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--- dyld/dyld-360.18/src/dyld.cpp
+++ dyld/dyld-95.3/src/dyld.cpp
@@ -1,6 +1,6 @@
/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
*
- * Copyright (c) 2004-2013 Apple Inc. All rights reserved.
+ * Copyright (c) 2004-2007 Apple Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
@@ -27,63 +27,18 @@
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
-#include <dirent.h>
#include <sys/param.h>
#include <mach/mach_time.h> // mach_absolute_time()
-#include <mach/mach_init.h>
#include <sys/types.h>
#include <sys/stat.h>
-#include <sys/syscall.h>
-#include <sys/socket.h>
-#include <sys/un.h>
-#include <sys/syslog.h>
-#include <sys/uio.h>
-#include <mach-o/fat.h>
+#include <mach-o/fat.h>
#include <mach-o/loader.h>
#include <mach-o/ldsyms.h>
#include <libkern/OSByteOrder.h>
-#include <libkern/OSAtomic.h>
#include <mach/mach.h>
#include <sys/sysctl.h>
#include <sys/mman.h>
#include <sys/dtrace.h>
-#include <libkern/OSAtomic.h>
-#include <Availability.h>
-#include <System/sys/codesign.h>
-#include <System/sys/csr.h>
-#include <_simple.h>
-#include <os/lock_private.h>
-
-
-#ifndef CPU_SUBTYPE_ARM_V5TEJ
- #define CPU_SUBTYPE_ARM_V5TEJ ((cpu_subtype_t) 7)
-#endif
-#ifndef CPU_SUBTYPE_ARM_XSCALE
- #define CPU_SUBTYPE_ARM_XSCALE ((cpu_subtype_t) 8)
-#endif
-#ifndef CPU_SUBTYPE_ARM_V7
- #define CPU_SUBTYPE_ARM_V7 ((cpu_subtype_t) 9)
-#endif
-#ifndef CPU_SUBTYPE_ARM_V7F
- #define CPU_SUBTYPE_ARM_V7F ((cpu_subtype_t) 10)
-#endif
-#ifndef CPU_SUBTYPE_ARM_V7S
- #define CPU_SUBTYPE_ARM_V7S ((cpu_subtype_t) 11)
-#endif
-#ifndef CPU_SUBTYPE_ARM_V7K
- #define CPU_SUBTYPE_ARM_V7K ((cpu_subtype_t) 12)
-#endif
-#ifndef LC_DYLD_ENVIRONMENT
- #define LC_DYLD_ENVIRONMENT 0x27
-#endif
-
-#ifndef CPU_SUBTYPE_X86_64_H
- #define CPU_SUBTYPE_X86_64_H ((cpu_subtype_t) 8)
-#endif
-
-#ifndef VM_PROT_SLIDE
- #define VM_PROT_SLIDE 0x20
-#endif
#include <vector>
#include <algorithm>
@@ -94,37 +49,24 @@
#include "ImageLoader.h"
#include "ImageLoaderMachO.h"
#include "dyldLibSystemInterface.h"
-#include "dyldSyscallInterface.h"
-#if DYLD_SHARED_CACHE_SUPPORT
#include "dyld_cache_format.h"
-#endif
-#include <coreSymbolicationDyldSupport.h>
-#if TARGET_IPHONE_SIMULATOR
- extern "C" void xcoresymbolication_load_notifier(void *connection, uint64_t load_timestamp, const char *image_path, const struct mach_header *mach_header);
- extern "C" void xcoresymbolication_unload_notifier(void *connection, uint64_t unload_timestamp, const char *image_path, const struct mach_header *mach_header);
- #define coresymbolication_load_notifier(c, t, p, h) xcoresymbolication_load_notifier(c, t, p, h)
- #define coresymbolication_unload_notifier(c, t, p, h) xcoresymbolication_unload_notifier(c, t, p, h)
-#endif
-
-// not libc header for send() syscall interface
-extern "C" ssize_t __sendto(int, const void *, size_t, int, const struct sockaddr *, socklen_t);
-
-
-// ARM and x86_64 are the only architecture that use cpu-sub-types
-#define CPU_SUBTYPES_SUPPORTED ((__arm__ || __x86_64__) && !TARGET_IPHONE_SIMULATOR)
-
-#if __LP64__
- #define LC_SEGMENT_COMMAND LC_SEGMENT_64
- #define LC_SEGMENT_COMMAND_WRONG LC_SEGMENT
- #define macho_segment_command segment_command_64
- #define macho_section section_64
-#else
- #define LC_SEGMENT_COMMAND LC_SEGMENT
- #define LC_SEGMENT_COMMAND_WRONG LC_SEGMENT_64
- #define macho_segment_command segment_command
- #define macho_section section
-#endif
-
+
+// from _simple.h in libc
+typedef struct _SIMPLE* _SIMPLE_STRING;
+extern "C" void _simple_vdprintf(int __fd, const char *__fmt, va_list __ap);
+extern "C" void _simple_dprintf(int __fd, const char *__fmt, ...);
+extern "C" _SIMPLE_STRING _simple_salloc(void);
+extern "C" int _simple_vsprintf(_SIMPLE_STRING __b, const char *__fmt, va_list __ap);
+extern "C" void _simple_sfree(_SIMPLE_STRING __b);
+extern "C" char * _simple_string(_SIMPLE_STRING __b);
+
+
+
+// 32-bit ppc is only architecture that uses cpu-sub-types
+#define CPU_SUBTYPES_SUPPORTED __ppc__
+
+
+#define OLD_GDB_DYLD_INTERFACE __ppc__ || __i386__
#define CPU_TYPE_MASK 0x00FFFFFF /* complement of CPU_ARCH_MASK */
@@ -133,9 +75,10 @@
/* implemented in dyld_gdb.cpp */
extern void addImagesToAllImages(uint32_t infoCount, const dyld_image_info info[]);
extern void removeImageFromAllImages(const mach_header* mh);
-extern void setAlImageInfosHalt(const char* message, uintptr_t flags);
-extern void addNonSharedCacheImageUUID(const dyld_uuid_info& info);
-extern const char* notifyGDB(enum dyld_image_states state, uint32_t infoCount, const dyld_image_info info[]);
+#if OLD_GDB_DYLD_INTERFACE
+extern void addImageForgdb(const mach_header* mh, uintptr_t slide, const char* physicalPath, const char* logicalPath);
+extern void removeImageForgdb(const struct mach_header* mh);
+#endif
// magic so CrashReporter logs message
extern "C" {
@@ -144,8 +87,6 @@
// implemented in dyldStartup.s for CrashReporter
extern "C" void dyld_fatal_error(const char* errString) __attribute__((noreturn));
-// magic linker symbol for start of dyld binary
-extern "C" const macho_header __dso_handle;
//
@@ -156,19 +97,7 @@
//
//
//
-namespace dyld {
- struct RegisteredDOF { const mach_header* mh; int registrationID; };
- struct DylibOverride { const char* installName; const char* override; };
-}
-
-
-VECTOR_NEVER_DESTRUCTED(ImageLoader*);
-VECTOR_NEVER_DESTRUCTED(dyld::RegisteredDOF);
-VECTOR_NEVER_DESTRUCTED(dyld::ImageCallback);
-VECTOR_NEVER_DESTRUCTED(dyld::DylibOverride);
-VECTOR_NEVER_DESTRUCTED(ImageLoader::DynamicReference);
-
-VECTOR_NEVER_DESTRUCTED(dyld_image_state_change_handler);
+
namespace dyld {
@@ -181,10 +110,9 @@
const char* const * DYLD_FALLBACK_FRAMEWORK_PATH;
const char* const * DYLD_LIBRARY_PATH;
const char* const * DYLD_FALLBACK_LIBRARY_PATH;
+ const char* const * DYLD_ROOT_PATH;
const char* const * DYLD_INSERT_LIBRARIES;
const char* const * LD_LIBRARY_PATH; // for unix conformance
- const char* const * DYLD_VERSIONED_LIBRARY_PATH;
- const char* const * DYLD_VERSIONED_FRAMEWORK_PATH;
bool DYLD_PRINT_LIBRARIES;
bool DYLD_PRINT_LIBRARIES_POST_LAUNCH;
bool DYLD_BIND_AT_LAUNCH;
@@ -192,10 +120,6 @@
bool DYLD_PRINT_OPTS;
bool DYLD_PRINT_ENV;
bool DYLD_DISABLE_DOFS;
- bool DYLD_PRINT_CS_NOTIFICATIONS;
- // DYLD_SHARED_CACHE_DONT_VALIDATE ==> sSharedCacheIgnoreInodeAndTimeStamp
- // DYLD_SHARED_CACHE_DIR ==> sSharedCacheDir
- // DYLD_ROOT_PATH ==> gLinkContext.rootPaths
// DYLD_IMAGE_SUFFIX ==> gLinkContext.imageSuffix
// DYLD_PRINT_OPTS ==> gLinkContext.verboseOpts
// DYLD_PRINT_ENV ==> gLinkContext.verboseEnv
@@ -203,7 +127,6 @@
// DYLD_PRINT_INITIALIZERS ==> gLinkContext.verboseInit
// DYLD_PRINT_SEGMENTS ==> gLinkContext.verboseMapping
// DYLD_PRINT_BINDINGS ==> gLinkContext.verboseBind
- // DYLD_PRINT_WEAK_BINDINGS ==> gLinkContext.verboseWeakBind
// DYLD_PRINT_REBASINGS ==> gLinkContext.verboseRebase
// DYLD_PRINT_DOFS ==> gLinkContext.verboseDOF
// DYLD_PRINT_APIS ==> gLogAPIs
@@ -212,62 +135,43 @@
// DYLD_NEW_LOCAL_SHARED_REGIONS ==> gLinkContext.sharedRegionMode
// DYLD_SHARED_REGION ==> gLinkContext.sharedRegionMode
// DYLD_PRINT_WARNINGS ==> gLinkContext.verboseWarnings
- // DYLD_PRINT_RPATHS ==> gLinkContext.verboseRPaths
- // DYLD_PRINT_INTERPOSING ==> gLinkContext.verboseInterposing
};
-
-
typedef std::vector<dyld_image_state_change_handler> StateHandlers;
-
-
-enum RestrictedReason { restrictedNot, restrictedBySetGUid, restrictedBySegment, restrictedByEntitlements };
-
+struct RegisteredDOF { const mach_header* mh; int registrationID; };
+
// all global state
static const char* sExecPath = NULL;
-static const char* sExecShortName = NULL;
-static const macho_header* sMainExecutableMachHeader = NULL;
-#if CPU_SUBTYPES_SUPPORTED
+static const struct mach_header* sMainExecutableMachHeader = NULL;
static cpu_type_t sHostCPU;
static cpu_subtype_t sHostCPUsubtype;
-#endif
static ImageLoader* sMainExecutable = NULL;
-static bool sProcessIsRestricted = false;
-static bool sProcessRequiresLibraryValidation = false;
-static RestrictedReason sRestrictedReason = restrictedNot;
-static size_t sInsertedDylibCount = 0;
+static bool sMainExecutableIsSetuid = false;
+static unsigned int sInsertedDylibCount = 0;
static std::vector<ImageLoader*> sAllImages;
static std::vector<ImageLoader*> sImageRoots;
static std::vector<ImageLoader*> sImageFilesNeedingTermination;
static std::vector<RegisteredDOF> sImageFilesNeedingDOFUnregistration;
+#if IMAGE_NOTIFY_SUPPORT
+static std::vector<ImageLoader*> sImagesToNotifyAboutOtherImages;
+#endif
static std::vector<ImageCallback> sAddImageCallbacks;
static std::vector<ImageCallback> sRemoveImageCallbacks;
-static bool sRemoveImageCallbacksInUse = false;
-static void* sSingleHandlers[7][3];
-static void* sBatchHandlers[7][3];
+static StateHandlers sSingleHandlers[7];
+static StateHandlers sBatchHandlers[7];
static ImageLoader* sLastImageByAddressCache;
static EnvironmentVariables sEnv;
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
static const char* sFrameworkFallbackPaths[] = { "$HOME/Library/Frameworks", "/Library/Frameworks", "/Network/Library/Frameworks", "/System/Library/Frameworks", NULL };
static const char* sLibraryFallbackPaths[] = { "$HOME/lib", "/usr/local/lib", "/usr/lib", NULL };
-#else
-static const char* sFrameworkFallbackPaths[] = { "/System/Library/Frameworks", NULL };
-static const char* sLibraryFallbackPaths[] = { "/usr/local/lib", "/usr/lib", NULL };
-#endif
+static BundleNotificationCallBack sBundleNotifier = NULL;
+static BundleLocatorCallBack sBundleLocation = NULL;
static UndefinedHandler sUndefinedHandler = NULL;
static ImageLoader* sBundleBeingLoaded = NULL; // hack until OFI is reworked
#if DYLD_SHARED_CACHE_SUPPORT
static const dyld_cache_header* sSharedCache = NULL;
-static long sSharedCacheSlide = 0;
-static bool sSharedCacheIgnoreInodeAndTimeStamp = false;
- bool gSharedCacheOverridden = false;
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
- static const char* sSharedCacheDir = IPHONE_DYLD_SHARED_CACHE_DIR;
- static bool sDylibsOverrideCache = false;
- #define ENABLE_DYLIBS_TO_OVERRIDE_CACHE_SIZE 1024
-#else
- static const char* sSharedCacheDir = MACOSX_DYLD_SHARED_CACHE_DIR;
-#endif
+bool gSharedCacheNotFound = false;
+bool gSharedCacheNeedsUpdating = false;
+bool gSharedCacheDontNotify = false;
#endif
ImageLoader::LinkContext gLinkContext;
bool gLogAPIs = false;
@@ -275,267 +179,53 @@
#if SUPPORT_OLD_CRT_INITIALIZATION
bool gRunInitializersOldWay = false;
#endif
-static std::vector<DylibOverride> sDylibOverrides;
-#if !TARGET_IPHONE_SIMULATOR
-static int sLogSocket = -1;
-#endif
-static bool sFrameworksFoundAsDylibs = false;
-#if __x86_64__
-static bool sHaswell = false;
-#endif
-static std::vector<ImageLoader::DynamicReference> sDynamicReferences;
-static OSSpinLock sDynamicReferencesLock = 0;
-static bool sLogToFile = false;
-static char sLoadingCrashMessage[1024] = "dyld: launch, loading dependent libraries";
-
-//
-// The MappedRanges structure is used for fast address->image lookups.
-// The table is only updated when the dyld lock is held, so we don't
-// need to worry about multiple writers. But readers may look at this
-// data without holding the lock. Therefore, all updates must be done
-// in an order that will never cause readers to see inconsistent data.
-// The general rule is that if the image field is non-NULL then
-// the other fields are valid.
-//
-struct MappedRanges
-{
- enum { count=400 };
- struct {
- ImageLoader* image;
- uintptr_t start;
- uintptr_t end;
- } array[count];
- MappedRanges* next;
-};
-
-static MappedRanges sMappedRangesStart;
-
-void addMappedRange(ImageLoader* image, uintptr_t start, uintptr_t end)
-{
- //dyld::log("addMappedRange(0x%lX->0x%lX) for %s\n", start, end, image->getShortName());
- for (MappedRanges* p = &sMappedRangesStart; p != NULL; p = p->next) {
- for (int i=0; i < MappedRanges::count; ++i) {
- if ( p->array[i].image == NULL ) {
- p->array[i].start = start;
- p->array[i].end = end;
- // add image field last with a barrier so that any reader will see consistent records
- OSMemoryBarrier();
- p->array[i].image = image;
- return;
- }
- }
- }
- // table must be full, chain another
- MappedRanges* newRanges = (MappedRanges*)malloc(sizeof(MappedRanges));
- bzero(newRanges, sizeof(MappedRanges));
- newRanges->array[0].start = start;
- newRanges->array[0].end = end;
- newRanges->array[0].image = image;
- for (MappedRanges* p = &sMappedRangesStart; p != NULL; p = p->next) {
- if ( p->next == NULL ) {
- OSMemoryBarrier();
- p->next = newRanges;
- break;
- }
- }
-}
-
-void removedMappedRanges(ImageLoader* image)
-{
- for (MappedRanges* p = &sMappedRangesStart; p != NULL; p = p->next) {
- for (int i=0; i < MappedRanges::count; ++i) {
- if ( p->array[i].image == image ) {
- // clear with a barrier so that any reader will see consistent records
- OSMemoryBarrier();
- p->array[i].image = NULL;
- }
- }
- }
-}
-
-ImageLoader* findMappedRange(uintptr_t target)
-{
- for (MappedRanges* p = &sMappedRangesStart; p != NULL; p = p->next) {
- for (int i=0; i < MappedRanges::count; ++i) {
- if ( p->array[i].image != NULL ) {
- if ( (p->array[i].start <= target) && (target < p->array[i].end) )
- return p->array[i].image;
- }
- }
- }
- return NULL;
-}
+#if __i386__
+static uint32_t sImportSegmentsStart = 0;
+static uint32_t sImportSegmentsSize = 0;
+#endif
const char* mkstringf(const char* format, ...)
-{
- _SIMPLE_STRING buf = _simple_salloc();
- if ( buf != NULL ) {
- va_list list;
- va_start(list, format);
- _simple_vsprintf(buf, format, list);
- va_end(list);
- const char* t = strdup(_simple_string(buf));
- _simple_sfree(buf);
- if ( t != NULL )
- return t;
- }
- return "mkstringf, out of memory error";
-}
-
-
-void throwf(const char* format, ...)
-{
- _SIMPLE_STRING buf = _simple_salloc();
- if ( buf != NULL ) {
- va_list list;
- va_start(list, format);
- _simple_vsprintf(buf, format, list);
- va_end(list);
- const char* t = strdup(_simple_string(buf));
- _simple_sfree(buf);
- if ( t != NULL )
- throw t;
- }
- throw "throwf, out of memory error";
-}
-
-
-#if !TARGET_IPHONE_SIMULATOR
-static int sLogfile = STDERR_FILENO;
-#endif
-
-#if LOG_BINDINGS
-static int sBindingsLogfile = -1;
-static void mysprintf(char* dst, const char* format, ...)
-{
- _SIMPLE_STRING buf = _simple_salloc();
- if ( buf != NULL ) {
- va_list list;
- va_start(list, format);
- _simple_vsprintf(buf, format, list);
- va_end(list);
- strcpy(dst, _simple_string(buf));
- _simple_sfree(buf);
- }
- else {
- strcpy(dst, "out of memory");
- }
-}
-void logBindings(const char* format, ...)
-{
- if ( sBindingsLogfile != -1 ) {
- va_list list;
- va_start(list, format);
- _simple_vdprintf(sBindingsLogfile, format, list);
- va_end(list);
- }
-}
-#endif
-
-#if !TARGET_IPHONE_SIMULATOR
-// based on CFUtilities.c: also_do_stderr()
-static bool useSyslog()
-{
- // Use syslog() for processes managed by launchd
- if ( (gLibSystemHelpers != NULL) && (gLibSystemHelpers->version >= 11) ) {
- if ( (*gLibSystemHelpers->isLaunchdOwned)() ) {
- return true;
- }
- }
-
- // If stderr is not available, use syslog()
- struct stat sb;
- int result = fstat(STDERR_FILENO, &sb);
- if ( result < 0 )
- return true; // file descriptor 2 is closed
-
- return false;
-}
-
-
-static void socket_syslogv(int priority, const char* format, va_list list)
-{
- // lazily create socket and connection to syslogd
- if ( sLogSocket == -1 ) {
- sLogSocket = ::socket(AF_UNIX, SOCK_DGRAM, 0);
- if (sLogSocket == -1)
- return; // cannot log
- ::fcntl(sLogSocket, F_SETFD, 1);
-
- struct sockaddr_un addr;
- addr.sun_family = AF_UNIX;
- strncpy(addr.sun_path, _PATH_LOG, sizeof(addr.sun_path));
- if ( ::connect(sLogSocket, (struct sockaddr *)&addr, sizeof(addr)) == -1 ) {
- ::close(sLogSocket);
- sLogSocket = -1;
- return;
- }
- }
-
- // format message to syslogd like: "<priority>Process[pid]: message"
- _SIMPLE_STRING buf = _simple_salloc();
- if ( buf == NULL )
- return;
- if ( _simple_sprintf(buf, "<%d>%s[%d]: ", LOG_USER|LOG_NOTICE, sExecShortName, getpid()) == 0 ) {
- if ( _simple_vsprintf(buf, format, list) == 0 ) {
- const char* p = _simple_string(buf);
- ::__sendto(sLogSocket, p, strlen(p), 0, NULL, 0);
- }
- }
- _simple_sfree(buf);
-}
-
-void vlog(const char* format, va_list list)
-{
- if ( !sLogToFile && useSyslog() )
- socket_syslogv(LOG_ERR, format, list);
- else {
- _simple_vdprintf(sLogfile, format, list);
- }
-}
-
-void log(const char* format, ...)
{
va_list list;
va_start(list, format);
- vlog(format, list);
+ _SIMPLE_STRING buf = _simple_salloc();
+ _simple_vsprintf(buf, format, list);
va_end(list);
-}
-
-
-void vwarn(const char* format, va_list list)
-{
- _simple_dprintf(sLogfile, "dyld: warning, ");
- _simple_vdprintf(sLogfile, format, list);
-}
-
-void warn(const char* format, ...)
+ const char* t = strdup(_simple_string(buf));
+ _simple_sfree(buf);
+ return t;
+}
+
+
+void throwf(const char* format, ...)
{
va_list list;
va_start(list, format);
- vwarn(format, list);
+ _SIMPLE_STRING buf = _simple_salloc();
+ _simple_vsprintf(buf, format, list);
va_end(list);
-}
-
-
-#endif // !TARGET_IPHONE_SIMULATOR
-
-
-// <rdar://problem/8867781> control access to sAllImages through a lock
-// because global dyld lock is not held during initialization phase of dlopen()
-// <rdar://problem/16145518> Use OSSpinLockLock to allow yielding
-static OSSpinLock sAllImagesLock = 0;
-
-static void allImagesLock()
-{
- OSSpinLockLock(&sAllImagesLock);
-}
-
-static void allImagesUnlock()
-{
- OSSpinLockUnlock(&sAllImagesLock);
+ const char* t = strdup(_simple_string(buf));
+ _simple_sfree(buf);
+ throw t;
+}
+
+void log(const char* format, ...)
+{
+ va_list list;
+ va_start(list, format);
+ _simple_vdprintf(STDERR_FILENO, format, list);
+ va_end(list);
+}
+
+void warn(const char* format, ...)
+{
+ _simple_dprintf(STDERR_FILENO, "dyld: warning, ");
+ va_list list;
+ va_start(list, format);
+ _simple_vdprintf(STDERR_FILENO, format, list);
+ va_end(list);
}
@@ -552,7 +242,7 @@
FileOpener::FileOpener(const char* path)
: fd(-1)
{
- fd = my_open(path, O_RDONLY, 0);
+ fd = open(path, O_RDONLY, 0);
}
FileOpener::~FileOpener()
@@ -562,9 +252,20 @@
}
+// forward declaration
+#if __ppc__ || __i386__
+bool isRosetta();
+#endif
+
+
static void registerDOFs(const std::vector<ImageLoader::DOFInfo>& dofs)
{
- const size_t dofSectionCount = dofs.size();
+#if __ppc__
+ // can't dtrace a program running emulated under rosetta rdar://problem/5179640
+ if ( isRosetta() )
+ return;
+#endif
+ const unsigned int dofSectionCount = dofs.size();
if ( !sEnv.DYLD_DISABLE_DOFS && (dofSectionCount != 0) ) {
int fd = open("/dev/" DTRACEMNR_HELPER, O_RDWR);
if ( fd < 0 ) {
@@ -594,13 +295,13 @@
info.registrationID = (int)(ioctlData->dofiod_helpers[i].dofhp_dof);
sImageFilesNeedingDOFUnregistration.push_back(info);
if ( gLinkContext.verboseDOF ) {
- dyld::log("dyld: registering DOF section %p in %s with dtrace, ID=0x%08X\n",
+ dyld::log("dyld: registering DOF section 0x%p in %s with dtrace, ID=0x%08X\n",
dofs[i].dof, dofs[i].imageShortName, info.registrationID);
}
}
}
else {
- //dyld::log( "dyld: ioctl to register dtrace DOF section failed\n");
+ dyld::log( "dyld: ioctl to register dtrace DOF section failed\n");
}
close(fd);
}
@@ -627,62 +328,77 @@
//
static void notifyAddImageCallbacks(ImageLoader* image)
{
- // use guard so that we cannot notify about the same image twice
- if ( ! image->addFuncNotified() ) {
- for (std::vector<ImageCallback>::iterator it=sAddImageCallbacks.begin(); it != sAddImageCallbacks.end(); it++)
- (*it)(image->machHeader(), image->getSlide());
- image->setAddFuncNotified();
- }
-}
-
+ for (std::vector<ImageCallback>::iterator it=sAddImageCallbacks.begin(); it != sAddImageCallbacks.end(); it++)
+ (*it)(image->machHeader(), image->getSlide());
+}
// notify gdb about these new images
-static const char* updateAllImages(enum dyld_image_states state, uint32_t infoCount, const struct dyld_image_info info[])
-{
- // <rdar://problem/8812589> don't add images without paths to all-image-info-list
- if ( info[0].imageFilePath != NULL )
- addImagesToAllImages(infoCount, info);
+static const char* notifyGDB(enum dyld_image_states state, uint32_t infoCount, const struct dyld_image_info info[])
+{
+ addImagesToAllImages(infoCount, info);
return NULL;
}
-
-static StateHandlers* stateToHandlers(dyld_image_states state, void* handlersArray[7][3])
+#if IMAGE_NOTIFY_SUPPORT
+// notify objc about these new images
+static void notifyAdding(const ImageLoader* const * images, unsigned int count)
+{
+ // build array
+ if ( count != 0 ) {
+ dyld_image_info infos[count];
+ for (unsigned int i=0; i < count; ++i) {
+ dyld_image_info* p = &infos[i];
+ const ImageLoader* image = images[i];
+ p->imageLoadAddress = image->machHeader();
+ p->imageFilePath = image->getPath();
+ p->imageFileModDate = image->lastModified();
+ //dyld::log("notifying objc about %s\n", image->getPath());
+ }
+
+ // tell all interested images (after gdb, so you can debug anything the notification does)
+ for (std::vector<ImageLoader*>::iterator it=sImagesToNotifyAboutOtherImages.begin(); it != sImagesToNotifyAboutOtherImages.end(); it++) {
+ (*it)->doNotification(dyld_image_adding, count, infos);
+ }
+ }
+}
+#endif
+
+static StateHandlers* stateToHandlers(dyld_image_states state, StateHandlers handlersArray[8])
{
switch ( state ) {
case dyld_image_state_mapped:
- return reinterpret_cast<StateHandlers*>(&handlersArray[0]);
+ return &handlersArray[0];
case dyld_image_state_dependents_mapped:
- return reinterpret_cast<StateHandlers*>(&handlersArray[1]);
+ return &handlersArray[1];
case dyld_image_state_rebased:
- return reinterpret_cast<StateHandlers*>(&handlersArray[2]);
+ return &handlersArray[2];
case dyld_image_state_bound:
- return reinterpret_cast<StateHandlers*>(&handlersArray[3]);
+ return &handlersArray[3];
case dyld_image_state_dependents_initialized:
- return reinterpret_cast<StateHandlers*>(&handlersArray[4]);
+ return &handlersArray[4];
case dyld_image_state_initialized:
- return reinterpret_cast<StateHandlers*>(&handlersArray[5]);
+ return &handlersArray[5];
case dyld_image_state_terminated:
- return reinterpret_cast<StateHandlers*>(&handlersArray[6]);
+ return &handlersArray[6];
}
return NULL;
}
-static void notifySingle(dyld_image_states state, const ImageLoader* image)
-{
- //dyld::log("notifySingle(state=%d, image=%s)\n", state, image->getPath());
+static void notifySingle(dyld_image_states state, const struct mach_header* mh, const char* path, time_t modDate)
+{
std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(state, sSingleHandlers);
if ( handlers != NULL ) {
dyld_image_info info;
- info.imageLoadAddress = image->machHeader();
- info.imageFilePath = image->getRealPath();
- info.imageFileModDate = image->lastModified();
+ info.imageLoadAddress = mh;
+ info.imageFilePath = path;
+ info.imageFileModDate = modDate;
for (std::vector<dyld_image_state_change_handler>::iterator it = handlers->begin(); it != handlers->end(); ++it) {
const char* result = (*it)(state, 1, &info);
if ( (result != NULL) && (state == dyld_image_state_mapped) ) {
@@ -693,68 +409,8 @@
}
}
}
- if ( state == dyld_image_state_mapped ) {
- // <rdar://problem/7008875> Save load addr + UUID for images from outside the shared cache
- if ( !image->inSharedCache() ) {
- dyld_uuid_info info;
- if ( image->getUUID(info.imageUUID) ) {
- info.imageLoadAddress = image->machHeader();
- addNonSharedCacheImageUUID(info);
- }
- }
- }
- // mach message csdlc about dynamically unloaded images
- if ( image->addFuncNotified() && (state == dyld_image_state_terminated) ) {
- uint64_t loadTimestamp = mach_absolute_time();
- if ( sEnv.DYLD_PRINT_CS_NOTIFICATIONS ) {
- dyld::log("dyld: coresymbolication_unload_notifier(%p, 0x%016llX, %p, %s)\n",
- dyld::gProcessInfo->coreSymbolicationShmPage, loadTimestamp, image->machHeader(), image->getPath());
- }
- if ( dyld::gProcessInfo->coreSymbolicationShmPage != NULL) {
- coresymbolication_unload_notifier(dyld::gProcessInfo->coreSymbolicationShmPage, loadTimestamp, image->getPath(), image->machHeader());
- }
- }
-}
-
-
-
-
-//
-// Normally, dyld_all_image_infos is only updated in batches after an entire
-// graph is loaded. But if there is an error loading the initial set of
-// dylibs needed by the main executable, dyld_all_image_infos is not yet set
-// up, leading to usually brief crash logs.
-//
-// This function manually adds the images loaded so far to dyld::gProcessInfo.
-// It should only be called before terminating.
-//
-void syncAllImages()
-{
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); ++it) {
- dyld_image_info info;
- ImageLoader* image = *it;
- info.imageLoadAddress = image->machHeader();
- info.imageFilePath = image->getRealPath();
- info.imageFileModDate = image->lastModified();
- // add to all_image_infos if not already there
- bool found = false;
- int existingCount = dyld::gProcessInfo->infoArrayCount;
- const dyld_image_info* existing = dyld::gProcessInfo->infoArray;
- if ( existing != NULL ) {
- for (int i=0; i < existingCount; ++i) {
- if ( existing[i].imageLoadAddress == info.imageLoadAddress ) {
- //dyld::log("not adding %s\n", info.imageFilePath);
- found = true;
- break;
- }
- }
- }
- if ( ! found ) {
- //dyld::log("adding %s\n", info.imageFilePath);
- addImagesToAllImages(1, &info);
- }
- }
-}
+}
+
static int imageSorter(const void* l, const void* r)
@@ -769,21 +425,19 @@
std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(state, sBatchHandlers);
if ( handlers != NULL ) {
// don't use a vector because it will use malloc/free and we want notifcation to be low cost
- allImagesLock();
- ImageLoader* images[sAllImages.size()+1];
- ImageLoader** end = images;
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- dyld_image_states imageState = (*it)->getState();
- if ( (imageState == state) || (orLater && (imageState > state)) )
- *end++ = *it;
- }
+ ImageLoader* images[sAllImages.size()+1];
+ ImageLoader** end = images;
+ for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
+ dyld_image_states imageState = (*it)->getState();
+ if ( (imageState == state) || (orLater && (imageState > state)) )
+ *end++ = *it;
+ }
if ( sBundleBeingLoaded != NULL ) {
dyld_image_states imageState = sBundleBeingLoaded->getState();
if ( (imageState == state) || (orLater && (imageState > state)) )
*end++ = sBundleBeingLoaded;
}
- const char* dontLoadReason = NULL;
- uint32_t count = (uint32_t)(end-images);
+ unsigned int count = end-images;
if ( end != images ) {
// sort bottom up
qsort(images, count, sizeof(ImageLoader*), &imageSorter);
@@ -794,7 +448,7 @@
ImageLoader* image = images[i];
//dyld::log(" state=%d, name=%s\n", state, image->getPath());
p->imageLoadAddress = image->machHeader();
- p->imageFilePath = image->getRealPath();
+ p->imageFilePath = image->getPath();
p->imageFileModDate = image->lastModified();
// special case for add_image hook
if ( state == dyld_image_state_bound )
@@ -806,7 +460,8 @@
if ( (result != NULL) && (state == dyld_image_state_dependents_mapped) ) {
//fprintf(stderr, " images rejected by handler=%p\n", onlyHandler);
// make copy of thrown string so that later catch clauses can free it
- dontLoadReason = strdup(result);
+ const char* str = strdup(result);
+ throw str;
}
}
else {
@@ -816,30 +471,14 @@
if ( (result != NULL) && (state == dyld_image_state_dependents_mapped) ) {
//fprintf(stderr, " images rejected by handler=%p\n", *it);
// make copy of thrown string so that later catch clauses can free it
- dontLoadReason = strdup(result);
- break;
+ const char* str = strdup(result);
+ throw str;
}
}
}
- if ( (state == dyld_image_state_dependents_mapped) && ((dyld::gProcessInfo->coreSymbolicationShmPage != NULL) || sEnv.DYLD_PRINT_CS_NOTIFICATIONS) ) {
- // mach message csdlc about loaded images
- uint64_t loadTimestamp = mach_absolute_time();
- for (unsigned j=0; j < count; ++j) {
- if ( sEnv.DYLD_PRINT_CS_NOTIFICATIONS ) {
- dyld::log("dyld: coresymbolication_load_notifier(%p, 0x%016llX, %p, %s)\n",
- dyld::gProcessInfo->coreSymbolicationShmPage, loadTimestamp, infos[j].imageLoadAddress, infos[j].imageFilePath);
- }
- coresymbolication_load_notifier(dyld::gProcessInfo->coreSymbolicationShmPage, loadTimestamp, infos[j].imageFilePath, infos[j].imageLoadAddress);
- }
- }
- }
- allImagesUnlock();
- if ( dontLoadReason != NULL )
- throw dontLoadReason;
- }
-}
-
-
+ }
+ }
+}
static void notifyBatch(dyld_image_states state)
{
@@ -857,6 +496,14 @@
sImageRoots.push_back(image);
}
+#if IMAGE_NOTIFY_SUPPORT
+// Objective-C will contain a __DATA/__image_notify section which contains pointers to a function to call
+// whenever any new image is loaded.
+static void addImageNeedingNotification(ImageLoader* image)
+{
+ sImagesToNotifyAboutOtherImages.push_back(image);
+}
+#endif
static void clearAllDepths()
{
@@ -864,18 +511,34 @@
(*it)->clearDepth();
}
-static void printAllDepths()
-{
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++)
- dyld::log("%03d %s\n", (*it)->getDepth(), (*it)->getShortName());
-}
-
-
static unsigned int imageCount()
{
- return (unsigned int)sAllImages.size();
-}
-
+ return sAllImages.size();
+}
+
+static void notifySharedCacheInvalid()
+{
+ gSharedCacheNeedsUpdating = true;
+}
+
+
+
+#if __i386__
+static void makeSharedCacheImportSegmentsWritable(bool writable)
+{
+ // if cache was built with read-only __IMPORT segments
+ if ( sImportSegmentsSize != 0 ) {
+ vm_prot_t prot = VM_PROT_EXECUTE | PROT_READ;
+ if ( writable )
+ prot |= VM_PROT_WRITE;
+ vm_protect(mach_task_self(), sImportSegmentsStart, sImportSegmentsSize, false, prot);
+ if ( gLinkContext.verboseMapping ) {
+ dyld::log("%18s at %p->%p altered permissions to %c%c%c\n", "", (char*)sImportSegmentsStart, (char*)sImportSegmentsStart+sImportSegmentsSize-1,
+ (prot & PROT_READ) ? 'r' : '.', (prot & PROT_WRITE) ? 'w' : '.', (prot & PROT_EXEC) ? 'x' : '.' );
+ }
+ }
+}
+#endif
static void setNewProgramVars(const ProgramVars& newVars)
{
@@ -896,88 +559,32 @@
}
#endif
-static void addDynamicReference(ImageLoader* from, ImageLoader* to) {
- // don't add dynamic reference if either are in the shared cache
- if( from->inSharedCache() )
- return;
- if( to->inSharedCache() )
- return;
-
- // don't add dynamic reference if there already is a static one
- if ( from->dependsOn(to) )
- return;
-
- // don't add if this combination already exists
- OSSpinLockLock(&sDynamicReferencesLock);
- for (std::vector<ImageLoader::DynamicReference>::iterator it=sDynamicReferences.begin(); it != sDynamicReferences.end(); ++it) {
- if ( (it->from == from) && (it->to == to) ) {
- OSSpinLockUnlock(&sDynamicReferencesLock);
- return;
- }
- }
-
- //dyld::log("addDynamicReference(%s, %s\n", from->getShortName(), to->getShortName());
- ImageLoader::DynamicReference t;
- t.from = from;
- t.to = to;
- sDynamicReferences.push_back(t);
- OSSpinLockUnlock(&sDynamicReferencesLock);
-}
-
static void addImage(ImageLoader* image)
{
// add to master list
- allImagesLock();
- sAllImages.push_back(image);
- allImagesUnlock();
-
- // update mapped ranges
- uintptr_t lastSegStart = 0;
- uintptr_t lastSegEnd = 0;
- for(unsigned int i=0, e=image->segmentCount(); i < e; ++i) {
- if ( image->segUnaccessible(i) )
- continue;
- uintptr_t start = image->segActualLoadAddress(i);
- uintptr_t end = image->segActualEndAddress(i);
- if ( start == lastSegEnd ) {
- // two segments are contiguous, just record combined segments
- lastSegEnd = end;
- }
- else {
- // non-contiguous segments, record last (if any)
- if ( lastSegEnd != 0 )
- addMappedRange(image, lastSegStart, lastSegEnd);
- lastSegStart = start;
- lastSegEnd = end;
- }
- }
- if ( lastSegEnd != 0 )
- addMappedRange(image, lastSegStart, lastSegEnd);
-
+ sAllImages.push_back(image);
if ( sEnv.DYLD_PRINT_LIBRARIES || (sEnv.DYLD_PRINT_LIBRARIES_POST_LAUNCH && (sMainExecutable!=NULL) && sMainExecutable->isLinked()) ) {
dyld::log("dyld: loaded: %s\n", image->getPath());
}
-}
-
-//
-// Helper for std::remove_if
-//
-class RefUsesImage {
-public:
- RefUsesImage(ImageLoader* image) : _image(image) {}
- bool operator()(const ImageLoader::DynamicReference& ref) const {
- return ( (ref.from == _image) || (ref.to == _image) );
- }
-private:
- ImageLoader* _image;
-};
-
-
+#if OLD_GDB_DYLD_INTERFACE
+ // let gdb find out about this
+ addImageForgdb(image->machHeader(), image->getSlide(), image->getPath(), image->getLogicalPath());
+#endif
+}
void removeImage(ImageLoader* image)
{
+ // if in termination list, pull it out and run terminator
+ for (std::vector<ImageLoader*>::iterator it=sImageFilesNeedingTermination.begin(); it != sImageFilesNeedingTermination.end(); it++) {
+ if ( *it == image ) {
+ sImageFilesNeedingTermination.erase(it);
+ image->doTermination(gLinkContext);
+ break;
+ }
+ }
+
// if has dtrace DOF section, tell dtrace it is going away, then remove from sImageFilesNeedingDOFUnregistration
for (std::vector<RegisteredDOF>::iterator it=sImageFilesNeedingDOFUnregistration.begin(); it != sImageFilesNeedingDOFUnregistration.end(); ) {
if ( it->mh == image->machHeader() ) {
@@ -990,40 +597,46 @@
}
}
- // tell all registered remove image handlers about this
+ // tell all register add image handlers about this
// do this before removing image from internal data structures so that the callback can query dyld about the image
if ( image->getState() >= dyld_image_state_bound ) {
- sRemoveImageCallbacksInUse = true; // This only runs inside dyld's global lock, so ok to use a global for the in-use flag.
for (std::vector<ImageCallback>::iterator it=sRemoveImageCallbacks.begin(); it != sRemoveImageCallbacks.end(); it++) {
(*it)(image->machHeader(), image->getSlide());
}
- sRemoveImageCallbacksInUse = false;
- }
-
- // notify
- notifySingle(dyld_image_state_terminated, image);
-
- // remove from mapped images table
- removedMappedRanges(image);
+ }
+
+#if IMAGE_NOTIFY_SUPPORT
+ // tell all interested images
+ for (std::vector<ImageLoader*>::iterator it=sImagesToNotifyAboutOtherImages.begin(); it != sImagesToNotifyAboutOtherImages.end(); it++) {
+ dyld_image_info info;
+ info.imageLoadAddress = image->machHeader();
+ info.imageFilePath = image->getPath();
+ info.imageFileModDate = image->lastModified();
+ (*it)->doNotification(dyld_image_removing, 1, &info);
+ }
+#endif
// remove from master list
- allImagesLock();
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- if ( *it == image ) {
- sAllImages.erase(it);
- break;
- }
- }
- allImagesUnlock();
-
- // remove from sDynamicReferences
- OSSpinLockLock(&sDynamicReferencesLock);
- sDynamicReferences.erase(std::remove_if(sDynamicReferences.begin(), sDynamicReferences.end(), RefUsesImage(image)), sDynamicReferences.end());
- OSSpinLockUnlock(&sDynamicReferencesLock);
-
+ for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
+ if ( *it == image ) {
+ sAllImages.erase(it);
+ break;
+ }
+ }
+
// flush find-by-address cache (do this after removed from master list, so there is no chance it can come back)
if ( sLastImageByAddressCache == image )
sLastImageByAddressCache = NULL;
+
+#if IMAGE_NOTIFY_SUPPORT
+ // if in announcement list, pull it out
+ for (std::vector<ImageLoader*>::iterator it=sImagesToNotifyAboutOtherImages.begin(); it != sImagesToNotifyAboutOtherImages.end(); it++) {
+ if ( *it == image ) {
+ sImagesToNotifyAboutOtherImages.erase(it);
+ break;
+ }
+ }
+#endif
// if in root list, pull it out
for (std::vector<ImageLoader*>::iterator it=sImageRoots.begin(); it != sImageRoots.end(); it++) {
@@ -1040,26 +653,14 @@
// tell gdb, new way
removeImageFromAllImages(image->machHeader());
-}
-
-
-void runImageStaticTerminators(ImageLoader* image)
-{
- // if in termination list, pull it out and run terminator
- bool mightBeMore;
- do {
- mightBeMore = false;
- for (std::vector<ImageLoader*>::iterator it=sImageFilesNeedingTermination.begin(); it != sImageFilesNeedingTermination.end(); it++) {
- if ( *it == image ) {
- sImageFilesNeedingTermination.erase(it);
- if (gLogAPIs) dyld::log("dlclose(), running static terminators for %p %s\n", image, image->getShortName());
- image->doTermination(gLinkContext);
- mightBeMore = true;
- break;
- }
- }
- } while ( mightBeMore );
-}
+
+#if OLD_GDB_DYLD_INTERFACE
+ // tell gdb, old way
+ removeImageForgdb(image->machHeader());
+ gdb_dyld_state_changed();
+#endif
+}
+
static void terminationRecorder(ImageLoader* image)
{
@@ -1071,47 +672,33 @@
return sExecPath;
}
-static void runAllStaticTerminators(void* extra)
-{
- try {
- const size_t imageCount = sImageFilesNeedingTermination.size();
- for(size_t i=imageCount; i > 0; --i){
- ImageLoader* image = sImageFilesNeedingTermination[i-1];
- image->doTermination(gLinkContext);
- }
- sImageFilesNeedingTermination.clear();
- notifyBatch(dyld_image_state_terminated);
- }
- catch (const char* msg) {
- halt(msg);
- }
-}
void initializeMainExecutable()
{
- // record that we've reached this step
- gLinkContext.startedInitializingMainExecutable = true;
+
+#if __i386__
+ // make all __IMPORT segments in the shared cache read-only
+ // before executing any code
+ makeSharedCacheImportSegmentsWritable(false);
+#endif
// run initialzers for any inserted dylibs
- ImageLoader::InitializerTimingList initializerTimes[sAllImages.size()];
- initializerTimes[0].count = 0;
- const size_t rootCount = sImageRoots.size();
+ const int rootCount = sImageRoots.size();
if ( rootCount > 1 ) {
- for(size_t i=1; i < rootCount; ++i) {
- sImageRoots[i]->runInitializers(gLinkContext, initializerTimes[0]);
- }
+ for(int i=1; i < rootCount; ++i)
+ sImageRoots[i]->runInitializers(gLinkContext);
}
// run initializers for main executable and everything it brings up
- sMainExecutable->runInitializers(gLinkContext, initializerTimes[0]);
-
- // register cxa_atexit() handler to run static terminators in all loaded images when this process exits
+ sMainExecutable->runInitializers(gLinkContext);
+
+ // register atexit() handler to run terminators in all loaded images when this process exits
if ( gLibSystemHelpers != NULL )
- (*gLibSystemHelpers->cxa_atexit)(&runAllStaticTerminators, NULL, NULL);
+ (*gLibSystemHelpers->cxa_atexit)(&runTerminators, NULL, NULL);
// dump info if requested
if ( sEnv.DYLD_PRINT_STATISTICS )
- ImageLoaderMachO::printStatistics((unsigned int)sAllImages.size(), initializerTimes[0]);
+ ImageLoaderMachO::printStatistics(sAllImages.size());
}
bool mainExecutablePrebound()
@@ -1125,142 +712,29 @@
}
-
-
-#if SUPPORT_VERSIONED_PATHS
-
-// forward reference
-static bool getDylibVersionAndInstallname(const char* dylibPath, uint32_t* version, char* installName);
-
-
-//
-// Examines a dylib file and if its current_version is newer than the installed
-// dylib at its install_name, then add the dylib file to sDylibOverrides.
-//
-static void checkDylibOverride(const char* dylibFile)
-{
- //dyld::log("checkDylibOverride('%s')\n", dylibFile);
- uint32_t altVersion;
- char sysInstallName[PATH_MAX];
- if ( getDylibVersionAndInstallname(dylibFile, &altVersion, sysInstallName) && (sysInstallName[0] =='/') ) {
- //dyld::log("%s has version 0x%08X and install name %s\n", dylibFile, altVersion, sysInstallName);
- uint32_t sysVersion;
- if ( getDylibVersionAndInstallname(sysInstallName, &sysVersion, NULL) ) {
- //dyld::log("%s has version 0x%08X\n", sysInstallName, sysVersion);
- if ( altVersion > sysVersion ) {
- //dyld::log("override found: %s -> %s\n", sysInstallName, dylibFile);
- // see if there already is an override for this dylib
- bool entryExists = false;
- for (std::vector<DylibOverride>::iterator it = sDylibOverrides.begin(); it != sDylibOverrides.end(); ++it) {
- if ( strcmp(it->installName, sysInstallName) == 0 ) {
- entryExists = true;
- uint32_t prevVersion;
- if ( getDylibVersionAndInstallname(it->override, &prevVersion, NULL) ) {
- if ( altVersion > prevVersion ) {
- // found an even newer override
- free((void*)(it->override));
- char resolvedPath[PATH_MAX];
- if ( realpath(dylibFile, resolvedPath) != NULL )
- it->override = strdup(resolvedPath);
- else
- it->override = strdup(dylibFile);
- break;
- }
- }
- }
- }
- if ( ! entryExists ) {
- DylibOverride entry;
- entry.installName = strdup(sysInstallName);
- char resolvedPath[PATH_MAX];
- if ( realpath(dylibFile, resolvedPath) != NULL )
- entry.override = strdup(resolvedPath);
- else
- entry.override = strdup(dylibFile);
- sDylibOverrides.push_back(entry);
- //dyld::log("added override: %s -> %s\n", entry.installName, entry.override);
- }
- }
- }
- }
-
-}
-
-static void checkDylibOverridesInDir(const char* dirPath)
-{
- //dyld::log("checkDylibOverridesInDir('%s')\n", dirPath);
- char dylibPath[PATH_MAX];
- if ( strlcpy(dylibPath, dirPath, PATH_MAX) >= PATH_MAX )
- return;
- DIR* dirp = opendir(dirPath);
- if ( dirp != NULL) {
- dirent entry;
- dirent* entp = NULL;
- while ( readdir_r(dirp, &entry, &entp) == 0 ) {
- if ( entp == NULL )
- break;
- if ( entp->d_type != DT_REG )
- continue;
- if ( strlcat(dylibPath, "/", PATH_MAX) >= PATH_MAX )
- continue;
- if ( strlcat(dylibPath, entp->d_name, PATH_MAX) >= PATH_MAX )
- continue;
- checkDylibOverride(dylibPath);
- }
- closedir(dirp);
- }
-}
-
-
-static void checkFrameworkOverridesInDir(const char* dirPath)
-{
- //dyld::log("checkFrameworkOverridesInDir('%s')\n", dirPath);
- char frameworkPath[PATH_MAX];
- if ( strlcpy(frameworkPath, dirPath, PATH_MAX) >= PATH_MAX )
- return;
- DIR* dirp = opendir(dirPath);
- if ( dirp != NULL) {
- dirent entry;
- dirent* entp = NULL;
- while ( readdir_r(dirp, &entry, &entp) == 0 ) {
- if ( entp == NULL )
- break;
- if ( entp->d_type != DT_DIR )
- continue;
- if ( strlcat(frameworkPath, "/", PATH_MAX) >= PATH_MAX )
- continue;
- int dirNameLen = strlen(entp->d_name);
- if ( dirNameLen < 11 )
- continue;
- if ( strcmp(&entp->d_name[dirNameLen-10], ".framework") != 0 )
- continue;
- if ( strlcat(frameworkPath, entp->d_name, PATH_MAX) >= PATH_MAX )
- continue;
- if ( strlcat(frameworkPath, "/", PATH_MAX) >= PATH_MAX )
- continue;
- if ( strlcat(frameworkPath, entp->d_name, PATH_MAX) >= PATH_MAX )
- continue;
- frameworkPath[strlen(frameworkPath)-10] = '\0';
- checkDylibOverride(frameworkPath);
- }
- closedir(dirp);
- }
-}
-#endif // SUPPORT_VERSIONED_PATHS
-
-
-//
-// Turns a colon separated list of strings into a NULL terminated array
-// of string pointers. If mainExecutableDir param is not NULL,
-// substitutes @loader_path with main executable's dir.
-//
-static const char** parseColonList(const char* list, const char* mainExecutableDir)
-{
- static const char* sEmptyList[] = { NULL };
-
- if ( list[0] == '\0' )
- return sEmptyList;
-
+void runTerminators(void* extra)
+{
+ const unsigned int imageCount = sImageFilesNeedingTermination.size();
+ for(unsigned int i=imageCount; i > 0; --i){
+ ImageLoader* image = sImageFilesNeedingTermination[i-1];
+ image->doTermination(gLinkContext);
+ notifySingle(dyld_image_state_terminated, image->machHeader(), image->getPath(), image->lastModified());
+ }
+ sImageFilesNeedingTermination.clear();
+ notifyBatch(dyld_image_state_terminated);
+}
+
+
+//
+// Turns a colon separated list of strings
+// into a NULL terminated array of string
+// pointers.
+//
+static const char** parseColonList(const char* list)
+{
+ if ( list[0] == '\0' )
+ return NULL;
+
int colonCount = 0;
for(const char* s=list; *s != '\0'; ++s) {
if (*s == ':')
@@ -1272,89 +746,21 @@
char** result = new char*[colonCount+2];
for(const char* s=list; *s != '\0'; ++s) {
if (*s == ':') {
- size_t len = s-start;
- if ( (mainExecutableDir != NULL) && (strncmp(start, "@loader_path/", 13) == 0) ) {
- size_t mainExecDirLen = strlen(mainExecutableDir);
- char* str = new char[mainExecDirLen+len+1];
- strcpy(str, mainExecutableDir);
- strlcat(str, &start[13], mainExecDirLen+len+1);
- str[mainExecDirLen+len-13] = '\0';
- start = &s[1];
- result[index++] = str;
- }
- else if ( (mainExecutableDir != NULL) && (strncmp(start, "@executable_path/", 17) == 0) ) {
- size_t mainExecDirLen = strlen(mainExecutableDir);
- char* str = new char[mainExecDirLen+len+1];
- strcpy(str, mainExecutableDir);
- strlcat(str, &start[17], mainExecDirLen+len+1);
- str[mainExecDirLen+len-17] = '\0';
- start = &s[1];
- result[index++] = str;
- }
- else {
- char* str = new char[len+1];
- strncpy(str, start, len);
- str[len] = '\0';
- start = &s[1];
- result[index++] = str;
- }
- }
- }
- size_t len = strlen(start);
- if ( (mainExecutableDir != NULL) && (strncmp(start, "@loader_path/", 13) == 0) ) {
- size_t mainExecDirLen = strlen(mainExecutableDir);
- char* str = new char[mainExecDirLen+len+1];
- strcpy(str, mainExecutableDir);
- strlcat(str, &start[13], mainExecDirLen+len+1);
- str[mainExecDirLen+len-13] = '\0';
- result[index++] = str;
- }
- else if ( (mainExecutableDir != NULL) && (strncmp(start, "@executable_path/", 17) == 0) ) {
- size_t mainExecDirLen = strlen(mainExecutableDir);
- char* str = new char[mainExecDirLen+len+1];
- strcpy(str, mainExecutableDir);
- strlcat(str, &start[17], mainExecDirLen+len+1);
- str[mainExecDirLen+len-17] = '\0';
- result[index++] = str;
- }
- else {
- char* str = new char[len+1];
- strcpy(str, start);
- result[index++] = str;
- }
+ int len = s-start;
+ char* str = new char[len+1];
+ strncpy(str, start, len);
+ str[len] = '\0';
+ start = &s[1];
+ result[index++] = str;
+ }
+ }
+ int len = strlen(start);
+ char* str = new char[len+1];
+ strcpy(str, start);
+ result[index++] = str;
result[index] = NULL;
- //dyld::log("parseColonList(%s)\n", list);
- //for(int i=0; result[i] != NULL; ++i)
- // dyld::log(" %s\n", result[i]);
return (const char**)result;
-}
-
-static void appendParsedColonList(const char* list, const char* mainExecutableDir, const char* const ** storage)
-{
- const char** newlist = parseColonList(list, mainExecutableDir);
- if ( *storage == NULL ) {
- // first time, just set
- *storage = newlist;
- }
- else {
- // need to append to existing list
- const char* const* existing = *storage;
- int count = 0;
- for(int i=0; existing[i] != NULL; ++i)
- ++count;
- for(int i=0; newlist[i] != NULL; ++i)
- ++count;
- const char** combinedList = new const char*[count+2];
- int index = 0;
- for(int i=0; existing[i] != NULL; ++i)
- combinedList[index++] = existing[i];
- for(int i=0; newlist[i] != NULL; ++i)
- combinedList[index++] = newlist[i];
- combinedList[index] = NULL;
- // leak old arrays
- *storage = combinedList;
- }
}
@@ -1422,37 +828,44 @@
}
}
-void processDyldEnvironmentVariable(const char* key, const char* value, const char* mainExecutableDir)
+void processDyldEnvironmentVarible(const char* key, const char* value)
{
if ( strcmp(key, "DYLD_FRAMEWORK_PATH") == 0 ) {
- appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_FRAMEWORK_PATH);
+ sEnv.DYLD_FRAMEWORK_PATH = parseColonList(value);
+ gSharedCacheDontNotify = true;
}
else if ( strcmp(key, "DYLD_FALLBACK_FRAMEWORK_PATH") == 0 ) {
- appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_FALLBACK_FRAMEWORK_PATH);
+ sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = parseColonList(value);
+ gSharedCacheDontNotify = true;
}
else if ( strcmp(key, "DYLD_LIBRARY_PATH") == 0 ) {
- appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_LIBRARY_PATH);
+ sEnv.DYLD_LIBRARY_PATH = parseColonList(value);
+ gSharedCacheDontNotify = true;
}
else if ( strcmp(key, "DYLD_FALLBACK_LIBRARY_PATH") == 0 ) {
- appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_FALLBACK_LIBRARY_PATH);
+ sEnv.DYLD_FALLBACK_LIBRARY_PATH = parseColonList(value);
+ gSharedCacheDontNotify = true;
}
else if ( (strcmp(key, "DYLD_ROOT_PATH") == 0) || (strcmp(key, "DYLD_PATHS_ROOT") == 0) ) {
+ gSharedCacheDontNotify = true;
if ( strcmp(value, "/") != 0 ) {
- gLinkContext.rootPaths = parseColonList(value, mainExecutableDir);
- for (int i=0; gLinkContext.rootPaths[i] != NULL; ++i) {
- if ( gLinkContext.rootPaths[i][0] != '/' ) {
+ sEnv.DYLD_ROOT_PATH = parseColonList(value);
+ for (int i=0; sEnv.DYLD_ROOT_PATH[i] != NULL; ++i) {
+ if ( sEnv.DYLD_ROOT_PATH[i][0] != '/' ) {
dyld::warn("DYLD_ROOT_PATH not used because it contains a non-absolute path\n");
- gLinkContext.rootPaths = NULL;
+ sEnv.DYLD_ROOT_PATH = NULL;
break;
}
}
}
}
else if ( strcmp(key, "DYLD_IMAGE_SUFFIX") == 0 ) {
+ gSharedCacheDontNotify = true;
gLinkContext.imageSuffix = value;
}
else if ( strcmp(key, "DYLD_INSERT_LIBRARIES") == 0 ) {
- sEnv.DYLD_INSERT_LIBRARIES = parseColonList(value, NULL);
+ sEnv.DYLD_INSERT_LIBRARIES = parseColonList(value);
+ gSharedCacheDontNotify = true;
}
else if ( strcmp(key, "DYLD_PRINT_OPTS") == 0 ) {
sEnv.DYLD_PRINT_OPTS = true;
@@ -1482,6 +895,7 @@
// ignore, no longer relevant but some scripts still set it
}
else if ( strcmp(key, "DYLD_NO_FIX_PREBINDING") == 0 ) {
+ gSharedCacheDontNotify = true;
}
else if ( strcmp(key, "DYLD_PREBIND_DEBUG") == 0 ) {
gLinkContext.verbosePrebinding = true;
@@ -1501,9 +915,6 @@
else if ( strcmp(key, "DYLD_PRINT_BINDINGS") == 0 ) {
gLinkContext.verboseBind = true;
}
- else if ( strcmp(key, "DYLD_PRINT_WEAK_BINDINGS") == 0 ) {
- gLinkContext.verboseWeakBind = true;
- }
else if ( strcmp(key, "DYLD_PRINT_REBASINGS") == 0 ) {
gLinkContext.verboseRebase = true;
}
@@ -1513,19 +924,8 @@
else if ( strcmp(key, "DYLD_PRINT_WARNINGS") == 0 ) {
gLinkContext.verboseWarnings = true;
}
- else if ( strcmp(key, "DYLD_PRINT_RPATHS") == 0 ) {
- gLinkContext.verboseRPaths = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_CS_NOTIFICATIONS") == 0 ) {
- sEnv.DYLD_PRINT_CS_NOTIFICATIONS = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_INTERPOSING") == 0 ) {
- gLinkContext.verboseInterposing = true;
- }
- else if ( strcmp(key, "DYLD_PRINT_CODE_SIGNATURES") == 0 ) {
- gLinkContext.verboseCodeSignatures = true;
- }
else if ( strcmp(key, "DYLD_SHARED_REGION") == 0 ) {
+ gSharedCacheDontNotify = true;
if ( strcmp(value, "private") == 0 ) {
gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
}
@@ -1542,15 +942,8 @@
dyld::warn("unknown option to DYLD_SHARED_REGION. Valid options are: use, private, avoid\n");
}
}
-#if DYLD_SHARED_CACHE_SUPPORT
- else if ( strcmp(key, "DYLD_SHARED_CACHE_DIR") == 0 ) {
- sSharedCacheDir = value;
- }
- else if ( strcmp(key, "DYLD_SHARED_CACHE_DONT_VALIDATE") == 0 ) {
- sSharedCacheIgnoreInodeAndTimeStamp = true;
- }
-#endif
else if ( strcmp(key, "DYLD_IGNORE_PREBINDING") == 0 ) {
+ gSharedCacheDontNotify = true;
if ( strcmp(value, "all") == 0 ) {
gLinkContext.prebindUsage = ImageLoader::kUseNoPrebinding;
}
@@ -1567,110 +960,10 @@
dyld::warn("unknown option to DYLD_IGNORE_PREBINDING. Valid options are: all, app, nonsplit\n");
}
}
-#if SUPPORT_VERSIONED_PATHS
- else if ( strcmp(key, "DYLD_VERSIONED_LIBRARY_PATH") == 0 ) {
- appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_VERSIONED_LIBRARY_PATH);
- }
- else if ( strcmp(key, "DYLD_VERSIONED_FRAMEWORK_PATH") == 0 ) {
- appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_VERSIONED_FRAMEWORK_PATH);
- }
-#endif
-#if !TARGET_IPHONE_SIMULATOR
- else if ( (strcmp(key, "DYLD_PRINT_TO_FILE") == 0) && (mainExecutableDir == NULL) ) {
- int fd = open(value, O_WRONLY | O_CREAT | O_APPEND, 0644);
- if ( fd != -1 ) {
- sLogfile = fd;
- sLogToFile = true;
- }
- else {
- dyld::log("dyld: could not open DYLD_PRINT_TO_FILE='%s', errno=%d\n", value, errno);
- }
- }
-#endif
else {
dyld::warn("unknown environment variable: %s\n", key);
}
}
-
-
-#if SUPPORT_LC_DYLD_ENVIRONMENT
-static void checkLoadCommandEnvironmentVariables()
-{
- // <rdar://problem/8440934> Support augmenting dyld environment variables in load commands
- const uint32_t cmd_count = sMainExecutableMachHeader->ncmds;
- const struct load_command* const cmds = (struct load_command*)(((char*)sMainExecutableMachHeader)+sizeof(macho_header));
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- switch (cmd->cmd) {
- case LC_DYLD_ENVIRONMENT:
- {
- const struct dylinker_command* envcmd = (struct dylinker_command*)cmd;
- const char* keyEqualsValue = (char*)envcmd + envcmd->name.offset;
- char mainExecutableDir[strlen(sExecPath)+2];
- strcpy(mainExecutableDir, sExecPath);
- char* lastSlash = strrchr(mainExecutableDir, '/');
- if ( lastSlash != NULL)
- lastSlash[1] = '\0';
- // only process variables that start with DYLD_ and end in _PATH
- if ( (strncmp(keyEqualsValue, "DYLD_", 5) == 0) ) {
- const char* equals = strchr(keyEqualsValue, '=');
- if ( equals != NULL ) {
- if ( strncmp(&equals[-5], "_PATH", 5) == 0 ) {
- const char* value = &equals[1];
- const size_t keyLen = equals-keyEqualsValue;
- // <rdar://problem/22799635> don't let malformed load command overflow stack
- if ( keyLen < 40 ) {
- char key[keyLen+1];
- strncpy(key, keyEqualsValue, keyLen);
- key[keyLen] = '\0';
- //dyld::log("processing: %s\n", keyEqualsValue);
- //dyld::log("mainExecutableDir: %s\n", mainExecutableDir);
- processDyldEnvironmentVariable(key, value, mainExecutableDir);
- }
- }
- }
- }
- }
- break;
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- }
-}
-#endif // SUPPORT_LC_DYLD_ENVIRONMENT
-
-
-static bool hasCodeSignatureLoadCommand(const macho_header* mh)
-{
- const uint32_t cmd_count = mh->ncmds;
- const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- if (cmd->cmd == LC_CODE_SIGNATURE)
- return true;
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- }
- return false;
-}
-
-
-#if SUPPORT_VERSIONED_PATHS
-static void checkVersionedPaths()
-{
- // search DYLD_VERSIONED_LIBRARY_PATH directories for dylibs and check if they are newer
- if ( sEnv.DYLD_VERSIONED_LIBRARY_PATH != NULL ) {
- for(const char* const* lp = sEnv.DYLD_VERSIONED_LIBRARY_PATH; *lp != NULL; ++lp) {
- checkDylibOverridesInDir(*lp);
- }
- }
-
- // search DYLD_VERSIONED_FRAMEWORK_PATH directories for dylibs and check if they are newer
- if ( sEnv.DYLD_VERSIONED_FRAMEWORK_PATH != NULL ) {
- for(const char* const* fp = sEnv.DYLD_VERSIONED_FRAMEWORK_PATH; *fp != NULL; ++fp) {
- checkFrameworkOverridesInDir(*fp);
- }
- }
-}
-#endif
//
@@ -1680,6 +973,9 @@
//
static void pruneEnvironmentVariables(const char* envp[], const char*** applep)
{
+ // setuit binaries don't trigger a cache rebuild
+ gSharedCacheDontNotify = true;
+
// delete all DYLD_* and LD_LIBRARY_PATH environment variables
int removedCount = 0;
const char** d = envp;
@@ -1692,222 +988,119 @@
}
}
*d++ = NULL;
-// <rdar://11894054> Disable warnings about DYLD_ env vars being ignored. The warnings are causing too much confusion.
-#if 0
- if ( removedCount != 0 ) {
- dyld::log("dyld: DYLD_ environment variables being ignored because ");
- switch (sRestrictedReason) {
- case restrictedNot:
- break;
- case restrictedBySetGUid:
- dyld::log("main executable (%s) is setuid or setgid\n", sExecPath);
- break;
- case restrictedBySegment:
- dyld::log("main executable (%s) has __RESTRICT/__restrict section\n", sExecPath);
- break;
- case restrictedByEntitlements:
- dyld::log("main executable (%s) is code signed with entitlements\n", sExecPath);
- break;
- }
- }
-#endif
+
// slide apple parameters
if ( removedCount > 0 ) {
*applep = d;
do {
*d = d[removedCount];
} while ( *d++ != NULL );
- for(int i=0; i < removedCount; ++i)
- *d++ = NULL;
}
// disable framework and library fallback paths for setuid binaries rdar://problem/4589305
sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = NULL;
sEnv.DYLD_FALLBACK_LIBRARY_PATH = NULL;
-
- if ( removedCount > 0 )
- strlcat(sLoadingCrashMessage, ", ignoring DYLD_* env vars", sizeof(sLoadingCrashMessage));
-}
-
-static void defaultUninitializedFallbackPaths(const char* envp[])
-{
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- // default value for DYLD_FALLBACK_FRAMEWORK_PATH, if not set in environment
- const char* home = _simple_getenv(envp, "HOME");;
- if ( sEnv.DYLD_FALLBACK_FRAMEWORK_PATH == NULL ) {
- const char** fpaths = sFrameworkFallbackPaths;
- if ( home == NULL )
- removePathWithPrefix(fpaths, "$HOME");
- else
- paths_expand_roots(fpaths, "$HOME", home);
- sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = fpaths;
- }
-
- // default value for DYLD_FALLBACK_LIBRARY_PATH, if not set in environment
- if ( sEnv.DYLD_FALLBACK_LIBRARY_PATH == NULL ) {
- const char** lpaths = sLibraryFallbackPaths;
- if ( home == NULL )
- removePathWithPrefix(lpaths, "$HOME");
- else
- paths_expand_roots(lpaths, "$HOME", home);
- sEnv.DYLD_FALLBACK_LIBRARY_PATH = lpaths;
- }
-#else
- if ( sEnv.DYLD_FALLBACK_FRAMEWORK_PATH == NULL )
- sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = sFrameworkFallbackPaths;
-
- if ( sEnv.DYLD_FALLBACK_LIBRARY_PATH == NULL )
- sEnv.DYLD_FALLBACK_LIBRARY_PATH = sLibraryFallbackPaths;
-#endif
-}
-
-
-static void checkEnvironmentVariables(const char* envp[])
-{
+}
+
+
+static void checkEnvironmentVariables(const char* envp[], bool ignoreEnviron)
+{
+ const char* home = NULL;
const char** p;
for(p = envp; *p != NULL; p++) {
const char* keyEqualsValue = *p;
if ( strncmp(keyEqualsValue, "DYLD_", 5) == 0 ) {
const char* equals = strchr(keyEqualsValue, '=');
- if ( equals != NULL ) {
- strlcat(sLoadingCrashMessage, "\n", sizeof(sLoadingCrashMessage));
- strlcat(sLoadingCrashMessage, keyEqualsValue, sizeof(sLoadingCrashMessage));
+ if ( (equals != NULL) && !ignoreEnviron ) {
const char* value = &equals[1];
- const size_t keyLen = equals-keyEqualsValue;
+ const int keyLen = equals-keyEqualsValue;
char key[keyLen+1];
strncpy(key, keyEqualsValue, keyLen);
key[keyLen] = '\0';
- processDyldEnvironmentVariable(key, value, NULL);
- }
+ processDyldEnvironmentVarible(key, value);
+ }
+ }
+ else if ( strncmp(keyEqualsValue, "HOME=", 5) == 0 ) {
+ home = &keyEqualsValue[5];
}
else if ( strncmp(keyEqualsValue, "LD_LIBRARY_PATH=", 16) == 0 ) {
const char* path = &keyEqualsValue[16];
- sEnv.LD_LIBRARY_PATH = parseColonList(path, NULL);
- }
- }
-
-#if SUPPORT_LC_DYLD_ENVIRONMENT
- checkLoadCommandEnvironmentVariables();
-#endif // SUPPORT_LC_DYLD_ENVIRONMENT
-
- // <rdar://problem/11281064> DYLD_IMAGE_SUFFIX and DYLD_ROOT_PATH cannot be used together
- if ( (gLinkContext.imageSuffix != NULL) && (gLinkContext.rootPaths != NULL) ) {
- dyld::warn("Ignoring DYLD_IMAGE_SUFFIX because DYLD_ROOT_PATH is used.\n");
- gLinkContext.imageSuffix = NULL;
- }
-}
-
-#if __x86_64__
-static bool isGCProgram(const macho_header* mh, uintptr_t slide)
-{
- const uint32_t cmd_count = mh->ncmds;
- const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- switch (cmd->cmd) {
- case LC_SEGMENT_COMMAND:
- {
- const struct macho_segment_command* seg = (struct macho_segment_command*)cmd;
- if (strcmp(seg->segname, "__DATA") == 0) {
- const struct macho_section* const sectionsStart = (struct macho_section*)((char*)seg + sizeof(struct macho_segment_command));
- const struct macho_section* const sectionsEnd = §ionsStart[seg->nsects];
- for (const struct macho_section* sect=sectionsStart; sect < sectionsEnd; ++sect) {
- if (strncmp(sect->sectname, "__objc_imageinfo", 16) == 0) {
- const uint32_t* objcInfo = (uint32_t*)(sect->addr + slide);
- return (objcInfo[1] & 6); // 6 = (OBJC_IMAGE_SUPPORTS_GC | OBJC_IMAGE_REQUIRES_GC)
- }
- }
- }
- }
- break;
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- }
- return false;
-}
-#endif
-static void getHostInfo(const macho_header* mainExecutableMH, uintptr_t mainExecutableSlide)
-{
-#if CPU_SUBTYPES_SUPPORTED
-#if __ARM_ARCH_7K__
- sHostCPU = CPU_TYPE_ARM;
- sHostCPUsubtype = CPU_SUBTYPE_ARM_V7K;
-#elif __ARM_ARCH_7A__
- sHostCPU = CPU_TYPE_ARM;
- sHostCPUsubtype = CPU_SUBTYPE_ARM_V7;
-#elif __ARM_ARCH_6K__
- sHostCPU = CPU_TYPE_ARM;
- sHostCPUsubtype = CPU_SUBTYPE_ARM_V6;
-#elif __ARM_ARCH_7F__
- sHostCPU = CPU_TYPE_ARM;
- sHostCPUsubtype = CPU_SUBTYPE_ARM_V7F;
-#elif __ARM_ARCH_7S__
- sHostCPU = CPU_TYPE_ARM;
- sHostCPUsubtype = CPU_SUBTYPE_ARM_V7S;
-#else
+ sEnv.LD_LIBRARY_PATH = parseColonList(path);
+ }
+ }
+
+ // default value for DYLD_FALLBACK_FRAMEWORK_PATH, if not set in environment
+ if ( sEnv.DYLD_FALLBACK_FRAMEWORK_PATH == NULL ) {
+ const char** paths = sFrameworkFallbackPaths;
+ if ( home == NULL )
+ removePathWithPrefix(paths, "$HOME");
+ else
+ paths_expand_roots(paths, "$HOME", home);
+ sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = paths;
+ }
+
+ // default value for DYLD_FALLBACK_LIBRARY_PATH, if not set in environment
+ if ( sEnv.DYLD_FALLBACK_LIBRARY_PATH == NULL ) {
+ const char** paths = sLibraryFallbackPaths;
+ if ( home == NULL )
+ removePathWithPrefix(paths, "$HOME");
+ else
+ paths_expand_roots(paths, "$HOME", home);
+ sEnv.DYLD_FALLBACK_LIBRARY_PATH = paths;
+ }
+}
+
+
+static void getHostInfo()
+{
+#if 1
struct host_basic_info info;
mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
mach_port_t hostPort = mach_host_self();
kern_return_t result = host_info(hostPort, HOST_BASIC_INFO, (host_info_t)&info, &count);
+ mach_port_deallocate(mach_task_self(), hostPort);
if ( result != KERN_SUCCESS )
throw "host_info() failed";
+
sHostCPU = info.cpu_type;
sHostCPUsubtype = info.cpu_subtype;
- mach_port_deallocate(mach_task_self(), hostPort);
- #if __x86_64__
- #if TARGET_IPHONE_SIMULATOR
- sHaswell = false;
- #else
- sHaswell = (sHostCPUsubtype == CPU_SUBTYPE_X86_64_H);
- // <rdar://problem/18528074> x86_64h: Fall back to the x86_64 slice if an app requires GC.
- if ( sHaswell ) {
- if ( isGCProgram(mainExecutableMH, mainExecutableSlide) ) {
- // When running a GC program on a haswell machine, don't use and 'h slices
- sHostCPUsubtype = CPU_SUBTYPE_X86_64_ALL;
- sHaswell = false;
- gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
- }
- }
- #endif
- #endif
-#endif
+#else
+ size_t valSize = sizeof(sHostCPU);
+ if (sysctlbyname ("hw.cputype", &sHostCPU, &valSize, NULL, 0) != 0)
+ throw "sysctlbyname(hw.cputype) failed";
+ valSize = sizeof(sHostCPUsubtype);
+ if (sysctlbyname ("hw.cpusubtype", &sHostCPUsubtype, &valSize, NULL, 0) != 0)
+ throw "sysctlbyname(hw.cpusubtype) failed";
#endif
}
static void checkSharedRegionDisable()
{
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
+ #if __ppc__ || __i386__
// if main executable has segments that overlap the shared region,
// then disable using the shared region
- if ( sMainExecutable->overlapsWithAddressRange((void*)(uintptr_t)SHARED_REGION_BASE, (void*)(uintptr_t)(SHARED_REGION_BASE + SHARED_REGION_SIZE)) ) {
+ if ( sMainExecutable->overlapsWithAddressRange((void*)0x90000000, (void*)0xAFFFFFFF) ) {
gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
if ( gLinkContext.verboseMapping )
dyld::warn("disabling shared region because main executable overlaps\n");
}
-#if __i386__
- if ( sProcessIsRestricted ) {
- // <rdar://problem/15280847> use private or no shared region for suid processes
- gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
- }
-#endif
-#endif
- // iPhoneOS cannot run without shared region
+ #endif
}
bool validImage(const ImageLoader* possibleImage)
{
- const size_t imageCount = sAllImages.size();
- for(size_t i=0; i < imageCount; ++i) {
- if ( possibleImage == sAllImages[i] ) {
- return true;
- }
- }
+ const unsigned int imageCount = sAllImages.size();
+ for(unsigned int i=0; i < imageCount; ++i) {
+ if ( possibleImage == sAllImages[i] ) {
+ return true;
+ }
+ }
return false;
}
uint32_t getImageCount()
{
- return (uint32_t)sAllImages.size();
+ return sAllImages.size();
}
ImageLoader* getIndexedImage(unsigned int index)
@@ -1919,32 +1112,70 @@
ImageLoader* findImageByMachHeader(const struct mach_header* target)
{
- return findMappedRange((uintptr_t)target);
+ const unsigned int imageCount = sAllImages.size();
+ for(unsigned int i=0; i < imageCount; ++i) {
+ ImageLoader* anImage = sAllImages[i];
+ if ( anImage->machHeader() == target )
+ return anImage;
+ }
+ return NULL;
}
ImageLoader* findImageContainingAddress(const void* addr)
{
- return findMappedRange((uintptr_t)addr);
-}
-
-
-ImageLoader* findImageContainingSymbol(const void* symbol)
-{
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* anImage = *it;
- if ( anImage->containsSymbol(symbol) )
+#if FIND_STATS
+ static int cacheHit = 0;
+ static int cacheMiss = 0;
+ static int cacheNotMacho = 0;
+ if ( ((cacheHit+cacheMiss+cacheNotMacho) % 100) == 0 )
+ dyld::log("findImageContainingAddress(): cache hit = %d, miss = %d, unknown = %d\n", cacheHit, cacheMiss, cacheNotMacho);
+#endif
+ // first look in image where last address was found rdar://problem/3685517
+ if ( (sLastImageByAddressCache != NULL) && sLastImageByAddressCache->containsAddress(addr) ) {
+#if FIND_STATS
+ ++cacheHit;
+#endif
+ return sLastImageByAddressCache;
+ }
+ // do exhastive search
+ // todo: consider maintaining a list sorted by address ranges and do a binary search on that
+ const unsigned int imageCount = sAllImages.size();
+ for(unsigned int i=0; i < imageCount; ++i) {
+ ImageLoader* anImage = sAllImages[i];
+ if ( anImage->containsAddress(addr) ) {
+ sLastImageByAddressCache = anImage;
+#if FIND_STATS
+ ++cacheMiss;
+#endif
return anImage;
- }
+ }
+ }
+#if FIND_STATS
+ ++cacheNotMacho;
+#endif
return NULL;
}
+ImageLoader* findImageContainingAddressThreadSafe(const void* addr)
+{
+ // do exhastive search
+ // todo: consider maintaining a list sorted by address ranges and do a binary search on that
+ const unsigned int imageCount = sAllImages.size();
+ for(unsigned int i=0; i < imageCount; ++i) {
+ ImageLoader* anImage = sAllImages[i];
+ if ( anImage->containsAddress(addr) ) {
+ return anImage;
+ }
+ }
+ return NULL;
+}
void forEachImageDo( void (*callback)(ImageLoader*, void* userData), void* userData)
{
- const size_t imageCount = sAllImages.size();
- for(size_t i=0; i < imageCount; ++i) {
+ const unsigned int imageCount = sAllImages.size();
+ for(unsigned int i=0; i < imageCount; ++i) {
ImageLoader* anImage = sAllImages[i];
(*callback)(anImage, userData);
}
@@ -1952,8 +1183,8 @@
ImageLoader* findLoadedImage(const struct stat& stat_buf)
{
- const size_t imageCount = sAllImages.size();
- for(size_t i=0; i < imageCount; ++i){
+ const unsigned int imageCount = sAllImages.size();
+ for(unsigned int i=0; i < imageCount; ++i){
ImageLoader* anImage = sAllImages[i];
if ( anImage->statMatch(stat_buf) )
return anImage;
@@ -1964,7 +1195,7 @@
// based on ANSI-C strstr()
static const char* strrstr(const char* str, const char* sub)
{
- const size_t sublen = strlen(sub);
+ const int sublen = strlen(sub);
for(const char* p = &str[strlen(str)]; p != str; --p) {
if ( strncmp(p, sub, sublen) == 0 )
return p;
@@ -1994,7 +1225,7 @@
const char* frameworkStart = &dirStart[1];
if ( dirStart == path )
--frameworkStart;
- size_t len = dirDot - frameworkStart;
+ int len = dirDot - frameworkStart;
char framework[len+1];
strncpy(framework, frameworkStart, len);
framework[len] = '\0';
@@ -2047,76 +1278,34 @@
//
-#if __arm__
-//
-// ARM sub-type lists
-//
-const int kARM_RowCount = 8;
-static const cpu_subtype_t kARM[kARM_RowCount][9] = {
-
- // armv7f can run: v7f, v7, v6, v5, and v4
- { CPU_SUBTYPE_ARM_V7F, CPU_SUBTYPE_ARM_V7, CPU_SUBTYPE_ARM_V6, CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST },
-
- // armv7k can run: v7k
- { CPU_SUBTYPE_ARM_V7K, CPU_SUBTYPE_END_OF_LIST },
-
- // armv7s can run: v7s, v7, v7f, v7k, v6, v5, and v4
- { CPU_SUBTYPE_ARM_V7S, CPU_SUBTYPE_ARM_V7, CPU_SUBTYPE_ARM_V7F, CPU_SUBTYPE_ARM_V6, CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST },
-
- // armv7 can run: v7, v6, v5, and v4
- { CPU_SUBTYPE_ARM_V7, CPU_SUBTYPE_ARM_V6, CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST },
-
- // armv6 can run: v6, v5, and v4
- { CPU_SUBTYPE_ARM_V6, CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST },
-
- // xscale can run: xscale, v5, and v4
- { CPU_SUBTYPE_ARM_XSCALE, CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST },
-
- // armv5 can run: v5 and v4
- { CPU_SUBTYPE_ARM_V5TEJ, CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST },
-
- // armv4 can run: v4
- { CPU_SUBTYPE_ARM_V4T, CPU_SUBTYPE_ARM_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST },
+//
+// 32-bit PowerPC sub-type lists
+//
+const int kPPC_RowCount = 4;
+static const cpu_subtype_t kPPC32[kPPC_RowCount][6] = {
+ // G5 can run any code
+ { CPU_SUBTYPE_POWERPC_970, CPU_SUBTYPE_POWERPC_7450, CPU_SUBTYPE_POWERPC_7400, CPU_SUBTYPE_POWERPC_750, CPU_SUBTYPE_POWERPC_ALL, CPU_SUBTYPE_END_OF_LIST },
+
+ // G4 can run all but G5 code
+ { CPU_SUBTYPE_POWERPC_7450, CPU_SUBTYPE_POWERPC_7400, CPU_SUBTYPE_POWERPC_750, CPU_SUBTYPE_POWERPC_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST },
+ { CPU_SUBTYPE_POWERPC_7400, CPU_SUBTYPE_POWERPC_7450, CPU_SUBTYPE_POWERPC_750, CPU_SUBTYPE_POWERPC_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST },
+
+ // G3 cannot run G4 or G5 code
+ { CPU_SUBTYPE_POWERPC_750, CPU_SUBTYPE_POWERPC_ALL, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST, CPU_SUBTYPE_END_OF_LIST }
};
-#endif
-
-#if __x86_64__
-//
-// x86_64 sub-type lists
-//
-const int kX86_64_RowCount = 2;
-static const cpu_subtype_t kX86_64[kX86_64_RowCount][5] = {
-
- // x86_64h can run: x86_64h, x86_64h(lib), x86_64(lib), and x86_64
- { CPU_SUBTYPE_X86_64_H, CPU_SUBTYPE_LIB64|CPU_SUBTYPE_X86_64_H, CPU_SUBTYPE_LIB64|CPU_SUBTYPE_X86_64_ALL, CPU_SUBTYPE_X86_64_ALL, CPU_SUBTYPE_END_OF_LIST },
-
- // x86_64 can run: x86_64(lib) and x86_64
- { CPU_SUBTYPE_X86_64_ALL, CPU_SUBTYPE_LIB64|CPU_SUBTYPE_X86_64_ALL, CPU_SUBTYPE_END_OF_LIST },
-
-};
-#endif
+
// scan the tables above to find the cpu-sub-type-list for this machine
static const cpu_subtype_t* findCPUSubtypeList(cpu_type_t cpu, cpu_subtype_t subtype)
{
switch (cpu) {
-#if __arm__
- case CPU_TYPE_ARM:
- for (int i=0; i < kARM_RowCount ; ++i) {
- if ( kARM[i][0] == subtype )
- return kARM[i];
+ case CPU_TYPE_POWERPC:
+ for (int i=0; i < kPPC_RowCount ; ++i) {
+ if ( kPPC32[i][0] == subtype )
+ return kPPC32[i];
}
break;
-#endif
-#if __x86_64__
- case CPU_TYPE_X86_64:
- for (int i=0; i < kX86_64_RowCount ; ++i) {
- if ( kX86_64[i][0] == subtype )
- return kX86_64[i];
- }
- break;
-#endif
}
return NULL;
}
@@ -2163,24 +1352,13 @@
for(uint32_t i=0; i < OSSwapBigToHostInt32(fh->nfat_arch); ++i) {
if ( (cpu_type_t)OSSwapBigToHostInt32(archs[i].cputype) == cpu) {
switch (cpu) {
-#if __arm__
- case CPU_TYPE_ARM:
- if ( (cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == CPU_SUBTYPE_ARM_ALL ) {
+ case CPU_TYPE_POWERPC:
+ if ( (cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == CPU_SUBTYPE_POWERPC_ALL ) {
*offset = OSSwapBigToHostInt32(archs[i].offset);
*len = OSSwapBigToHostInt32(archs[i].size);
return true;
}
break;
-#endif
-#if __x86_64__
- case CPU_TYPE_X86_64:
- if ( (cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == CPU_SUBTYPE_X86_64_ALL ) {
- *offset = OSSwapBigToHostInt32(archs[i].offset);
- *len = OSSwapBigToHostInt32(archs[i].size);
- return true;
- }
- break;
-#endif
}
}
}
@@ -2235,7 +1413,7 @@
//
// This is used to validate if a non-fat (aka thin or raw) mach-o file can be used
// on the current processor. //
-bool isCompatibleMachO(const uint8_t* firstPage, const char* path)
+bool isCompatibleMachO(const uint8_t* firstPage)
{
#if CPU_SUBTYPES_SUPPORTED
// It is deemed compatible if any of the following are true:
@@ -2255,7 +1433,7 @@
return true;
}
// have list and not in list, so not compatible
- throwf("incompatible cpu-subtype: 0x%08X in %s", mh->cpusubtype, path);
+ throw "incompatible cpu-subtype";
}
// unknown cpu sub-type, but if exact match for current subtype then ok to use
if ( mh->cpusubtype == sHostCPUsubtype )
@@ -2264,6 +1442,12 @@
// cpu type has no ordered list of subtypes
switch (mh->cputype) {
+ case CPU_TYPE_POWERPC:
+ // allow _ALL to be used by any client
+ if ( mh->cpusubtype == CPU_SUBTYPE_POWERPC_ALL )
+ return true;
+ break;
+ case CPU_TYPE_POWERPC64:
case CPU_TYPE_I386:
case CPU_TYPE_X86_64:
// subtypes are not used or these architectures
@@ -2289,11 +1473,11 @@
// The kernel maps in main executable before dyld gets control. We need to
// make an ImageLoader* for the already mapped in main executable.
-static ImageLoader* instantiateFromLoadedImage(const macho_header* mh, uintptr_t slide, const char* path)
+static ImageLoader* instantiateFromLoadedImage(const struct mach_header* mh, uintptr_t slide, const char* path)
{
// try mach-o loader
- if ( isCompatibleMachO((const uint8_t*)mh, path) ) {
- ImageLoader* image = ImageLoaderMachO::instantiateMainExecutable(mh, slide, path, gLinkContext);
+ if ( isCompatibleMachO((const uint8_t*)mh) ) {
+ ImageLoader* image = new ImageLoaderMachO(mh, slide, path, gLinkContext);
addImage(image);
return image;
}
@@ -2301,84 +1485,35 @@
throw "main executable not a known format";
}
-
#if DYLD_SHARED_CACHE_SUPPORT
-static bool findInSharedCacheImage(const char* path, bool searchByPath, const struct stat* stat_buf, const macho_header** mh, const char** pathInCache, long* slide)
+static ImageLoader* findSharedCacheImage(const struct stat& stat_buf, const char* path)
{
if ( sSharedCache != NULL ) {
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- // Mac OS X always requires inode/mtime to valid cache
- // if stat() not done yet, do it now
- struct stat statb;
- if ( stat_buf == NULL ) {
- if ( my_stat(path, &statb) == -1 )
- return false;
- stat_buf = &statb;
- }
-#endif
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
- uint64_t hash = 0;
- for (const char* s=path; *s != '\0'; ++s)
- hash += hash*4 + *s;
-#endif
-
// walk shared cache to see if there is a cached image that matches the inode/mtime/path desired
const dyld_cache_image_info* const start = (dyld_cache_image_info*)((uint8_t*)sSharedCache + sSharedCache->imagesOffset);
const dyld_cache_image_info* const end = &start[sSharedCache->imagesCount];
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
- const bool cacheHasHashInfo = (start->modTime == 0);
-#endif
for( const dyld_cache_image_info* p = start; p != end; ++p) {
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
- // just check path
- const char* aPath = (char*)sSharedCache + p->pathFileOffset;
- if ( cacheHasHashInfo && (p->inode != hash) )
- continue;
- if ( strcmp(path, aPath) == 0 ) {
- // found image in cache
- *mh = (macho_header*)(p->address+sSharedCacheSlide);
- *pathInCache = aPath;
- *slide = sSharedCacheSlide;
- return true;
- }
-#elif __MAC_OS_X_VERSION_MIN_REQUIRED
// check mtime and inode first because it is fast
- bool inodeMatch = ( ((time_t)p->modTime == stat_buf->st_mtime) && ((ino_t)p->inode == stat_buf->st_ino) );
- if ( searchByPath || sSharedCacheIgnoreInodeAndTimeStamp || inodeMatch ) {
+ if ( ((time_t)p->modTime == stat_buf.st_mtime) && ((ino_t)p->inode == stat_buf.st_ino) ) {
// mod-time and inode match an image in the shared cache, now check path
- const char* aPath = (char*)sSharedCache + p->pathFileOffset;
- bool cacheHit = (strcmp(path, aPath) == 0);
- if ( inodeMatch && !cacheHit ) {
+ const char* pathInCache = (char*)sSharedCache + p->pathFileOffset;
+ bool cacheHit = (strcmp(path, pathInCache) == 0);
+ if ( ! cacheHit ) {
// path does not match install name of dylib in cache, but inode and mtime does match
// perhaps path is a symlink to the cached dylib
struct stat pathInCacheStatBuf;
- if ( my_stat(aPath, &pathInCacheStatBuf) != -1 )
- cacheHit = ( (pathInCacheStatBuf.st_dev == stat_buf->st_dev) && (pathInCacheStatBuf.st_ino == stat_buf->st_ino) );
+ if ( stat(pathInCache, &pathInCacheStatBuf) != -1 )
+ cacheHit = ( (pathInCacheStatBuf.st_dev == stat_buf.st_dev) && (pathInCacheStatBuf.st_ino == stat_buf.st_ino) );
}
if ( cacheHit ) {
- // found image in cache, return info
- *mh = (macho_header*)(p->address+sSharedCacheSlide);
- //dyld::log("findInSharedCacheImage(), mh=%p, p->address=0x%0llX, slid=0x%0lX, path=%p\n",
- // *mh, p->address, sSharedCacheSlide, aPath);
- *pathInCache = aPath;
- *slide = sSharedCacheSlide;
- return true;
+ // found image in cache, instantiate an ImageLoader with it
+ return new ImageLoaderMachO((struct mach_header*)(p->address), pathInCache, stat_buf, gLinkContext);
}
}
-#endif
}
}
- return false;
-}
-
-bool inSharedCache(const char* path)
-{
- const macho_header* mhInCache;
- const char* pathInCache;
- long slide;
- return findInSharedCacheImage(path, true, NULL, &mhInCache, &pathInCache, &slide);
-}
-
+ return NULL;
+}
#endif
static ImageLoader* checkandAddImage(ImageLoader* image, const LoadContext& context)
@@ -2392,8 +1527,7 @@
if ( installPath != NULL) {
if ( strcmp(loadedImageInstallPath, installPath) == 0 ) {
//dyld::log("duplicate(%s) => %p\n", installPath, anImage);
- removeImage(image);
- ImageLoader::deleteImage(image);
+ delete image;
return anImage;
}
}
@@ -2406,12 +1540,6 @@
if ( context.mustBeDylib && !image->isDylib() )
throw "not a dylib";
- // regular main executables cannot be loaded
- if ( image->isExecutable() ) {
- if ( !context.canBePIE || !image->isPositionIndependentExecutable() )
- throw "can't load a main executable";
- }
-
// don't add bundles to global list, they can be loaded but not linked. When linked it will be added to list
if ( ! image->isBundle() )
addImage(image);
@@ -2419,36 +1547,8 @@
return image;
}
-#if TARGET_IPHONE_SIMULATOR
-static bool isSimulatorBinary(const uint8_t* firstPage, const char* path)
-{
- const macho_header* mh = (macho_header*)firstPage;
- const uint32_t cmd_count = mh->ncmds;
- const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
- const struct load_command* const cmdsReadEnd = (struct load_command*)(((char*)mh)+4096);
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- switch (cmd->cmd) {
- case LC_VERSION_MIN_IPHONEOS:
- case LC_VERSION_MIN_TVOS:
- case LC_VERSION_MIN_WATCHOS:
- return true;
- case LC_VERSION_MIN_MACOSX:
- // grandfather in a few libSystem dylibs
- if (strstr(path, "/usr/lib/system") || strstr(path, "/usr/lib/libSystem"))
- return true;
- return false;
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- if ( cmd > cmdsReadEnd )
- return true;
- }
- return false;
-}
-#endif
-
// map in file and instantiate an ImageLoader
-static ImageLoader* loadPhase6(int fd, const struct stat& stat_buf, const char* path, const LoadContext& context)
+static ImageLoader* loadPhase6(int fd, struct stat& stat_buf, const char* path, const LoadContext& context)
{
//dyld::log("%s(%s)\n", __func__ , path);
uint64_t fileOffset = 0;
@@ -2463,23 +1563,18 @@
// min mach-o file is 4K
if ( fileLength < 4096 ) {
- if ( pread(fd, firstPage, fileLength, 0) != (ssize_t)fileLength )
- throwf("pread of short file failed: %d", errno);
+ pread(fd, firstPage, fileLength, 0);
shortPage = true;
}
else {
- if ( pread(fd, firstPage, 4096,0) != 4096 )
- throwf("pread of first 4K failed: %d", errno);
+ pread(fd, firstPage, 4096,0);
}
// if fat wrapper, find usable sub-file
const fat_header* fileStartAsFat = (fat_header*)firstPage;
if ( fileStartAsFat->magic == OSSwapBigToHostInt32(FAT_MAGIC) ) {
if ( fatFindBest(fileStartAsFat, &fileOffset, &fileLength) ) {
- if ( (fileOffset+fileLength) > (uint64_t)(stat_buf.st_size) )
- throwf("truncated fat file. file length=%llu, but needed slice goes to %llu", stat_buf.st_size, fileOffset+fileLength);
- if (pread(fd, firstPage, 4096, fileOffset) != 4096)
- throwf("pread of fat file failed: %d", errno);
+ pread(fd, firstPage, 4096, fileOffset);
}
else {
throw "no matching architecture in universal wrapper";
@@ -2487,33 +1582,12 @@
}
// try mach-o loader
- if ( shortPage )
- throw "file too short";
- if ( isCompatibleMachO(firstPage, path) ) {
-
- // only MH_BUNDLE, MH_DYLIB, and some MH_EXECUTE can be dynamically loaded
- switch ( ((mach_header*)firstPage)->filetype ) {
- case MH_EXECUTE:
- case MH_DYLIB:
- case MH_BUNDLE:
- break;
- default:
- throw "mach-o, but wrong filetype";
- }
-
-#if TARGET_IPHONE_SIMULATOR
- #if TARGET_OS_WATCH || TARGET_OS_TV
- // disable error during bring up of these simulators
- #else
- // <rdar://problem/14168872> dyld_sim should restrict loading osx binaries
- if ( !isSimulatorBinary(firstPage, path) ) {
- throw "mach-o, but not built for iOS simulator";
- }
- #endif
-#endif
+ if ( isCompatibleMachO(firstPage) ) {
+ if ( shortPage )
+ throw "file too short";
// instantiate an image
- ImageLoader* image = ImageLoaderMachO::instantiateFromFile(path, fd, firstPage, fileOffset, fileLength, stat_buf, gLinkContext);
+ ImageLoader* image = new ImageLoaderMachO(path, fd, firstPage, fileOffset, fileLength, stat_buf, gLinkContext);
// validate
return checkandAddImage(image, context);
@@ -2536,22 +1610,45 @@
}
-static ImageLoader* loadPhase5open(const char* path, const LoadContext& context, const struct stat& stat_buf, std::vector<const char*>* exceptions)
+// try to open file
+static ImageLoader* loadPhase5open(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
{
//dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
-
+ ImageLoader* image = NULL;
+
+ // just return NULL if file not found, but record any other errors
+ struct stat stat_buf;
+ if ( stat(path, &stat_buf) == -1 ) {
+ int err = errno;
+ if ( err != ENOENT ) {
+ exceptions->push_back(dyld::mkstringf("%s: stat() failed with errno=%d", path, err));
+ }
+ return NULL;
+ }
+
+ // in case image was renamed or found via symlinks, check for inode match
+ image = findLoadedImage(stat_buf);
+ if ( image != NULL )
+ return image;
+
+ // do nothing if not already loaded and if RTLD_NOLOAD or NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED
+ if ( context.dontLoad )
+ return NULL;
+
+#if DYLD_SHARED_CACHE_SUPPORT
+ // see if this image is in shared cache
+ image = findSharedCacheImage(stat_buf, path);
+ if ( image != NULL ) {
+ return checkandAddImage(image, context);
+ }
+#endif
+
// open file (automagically closed when this function exits)
FileOpener file(path);
- // just return NULL if file not found, but record any other errors
- if ( file.getFileDescriptor() == -1 ) {
- int err = errno;
- if ( err != ENOENT ) {
- const char* newMsg = dyld::mkstringf("%s: open() failed with errno=%d", path, err);
- exceptions->push_back(newMsg);
- }
- return NULL;
- }
+ // just return NULL if file not found
+ if ( file.getFileDescriptor() == -1 )
+ return NULL;
try {
return loadPhase6(file.getFileDescriptor(), stat_buf, path, context);
@@ -2564,154 +1661,21 @@
}
}
-
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
-static ImageLoader* loadPhase5load(const char* path, const char* orgPath, const LoadContext& context, std::vector<const char*>* exceptions)
-{
- //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
- ImageLoader* image = NULL;
-
- // just return NULL if file not found, but record any other errors
- struct stat stat_buf;
- if ( my_stat(path, &stat_buf) == -1 ) {
- int err = errno;
- if ( err != ENOENT ) {
- exceptions->push_back(dyld::mkstringf("%s: stat() failed with errno=%d", path, err));
- }
- return NULL;
- }
-
- // in case image was renamed or found via symlinks, check for inode match
- image = findLoadedImage(stat_buf);
- if ( image != NULL )
- return image;
-
- // do nothing if not already loaded and if RTLD_NOLOAD or NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED
- if ( context.dontLoad )
- return NULL;
-
-#if DYLD_SHARED_CACHE_SUPPORT
- // see if this image is in shared cache
- const macho_header* mhInCache;
- const char* pathInCache;
- long slideInCache;
- if ( findInSharedCacheImage(path, false, &stat_buf, &mhInCache, &pathInCache, &slideInCache) ) {
- image = ImageLoaderMachO::instantiateFromCache(mhInCache, pathInCache, slideInCache, stat_buf, gLinkContext);
- return checkandAddImage(image, context);
- }
-#endif
- // file exists and is not in dyld shared cache, so open it
- return loadPhase5open(path, context, stat_buf, exceptions);
-}
-#endif // __MAC_OS_X_VERSION_MIN_REQUIRED
-
-
-
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
-static ImageLoader* loadPhase5stat(const char* path, const LoadContext& context, struct stat* stat_buf,
- int* statErrNo, bool* imageFound, std::vector<const char*>* exceptions)
-{
- ImageLoader* image = NULL;
- *imageFound = false;
- *statErrNo = 0;
- if ( my_stat(path, stat_buf) == 0 ) {
- // in case image was renamed or found via symlinks, check for inode match
- image = findLoadedImage(*stat_buf);
- if ( image != NULL ) {
- *imageFound = true;
- return image;
- }
- // do nothing if not already loaded and if RTLD_NOLOAD
- if ( context.dontLoad ) {
- *imageFound = true;
- return NULL;
- }
- image = loadPhase5open(path, context, *stat_buf, exceptions);
- if ( image != NULL ) {
- *imageFound = true;
- return image;
- }
- }
- else {
- *statErrNo = errno;
- }
- return NULL;
-}
-
-// try to open file
-static ImageLoader* loadPhase5load(const char* path, const char* orgPath, const LoadContext& context, std::vector<const char*>* exceptions)
-{
- //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
- struct stat stat_buf;
- bool imageFound;
- int statErrNo;
- ImageLoader* image;
-#if DYLD_SHARED_CACHE_SUPPORT
- if ( sDylibsOverrideCache ) {
- // flag is set that allows installed framework roots to override dyld shared cache
- image = loadPhase5stat(path, context, &stat_buf, &statErrNo, &imageFound, exceptions);
- if ( imageFound )
- return image;
- }
- // see if this image is in shared cache
- const macho_header* mhInCache;
- const char* pathInCache;
- long slideInCache;
- if ( findInSharedCacheImage(path, true, NULL, &mhInCache, &pathInCache, &slideInCache) ) {
- // see if this image in the cache was already loaded via a different path
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); ++it) {
- ImageLoader* anImage = *it;
- if ( (const macho_header*)anImage->machHeader() == mhInCache )
- return anImage;
- }
- // do nothing if not already loaded and if RTLD_NOLOAD
- if ( context.dontLoad )
- return NULL;
- // nope, so instantiate a new image from dyld shared cache
- // <rdar://problem/7014995> zero out stat buffer so mtime, etc are zero for items from the shared cache
- bzero(&stat_buf, sizeof(stat_buf));
- image = ImageLoaderMachO::instantiateFromCache(mhInCache, pathInCache, slideInCache, stat_buf, gLinkContext);
- return checkandAddImage(image, context);
- }
-
- if ( !sDylibsOverrideCache ) {
- // flag is not set, and not in cache to try opening it
- image = loadPhase5stat(path, context, &stat_buf, &statErrNo, &imageFound, exceptions);
- if ( imageFound )
- return image;
- }
-#else
- image = loadPhase5stat(path, context, &stat_buf, &statErrNo, &imageFound, exceptions);
- if ( imageFound )
- return image;
-#endif
- // just return NULL if file not found, but record any other errors
- if ( (statErrNo != ENOENT) && (statErrNo != 0) ) {
- exceptions->push_back(dyld::mkstringf("%s: stat() failed with errno=%d", path, statErrNo));
- }
- return NULL;
-}
-#endif // __IPHONE_OS_VERSION_MIN_REQUIRED
-
-
// look for path match with existing loaded images
-static ImageLoader* loadPhase5check(const char* path, const char* orgPath, const LoadContext& context)
-{
- //dyld::log("%s(%s, %s)\n", __func__ , path, orgPath);
+static ImageLoader* loadPhase5check(const char* path, const LoadContext& context)
+{
+ //dyld::log("%s(%s)\n", __func__ , path);
// search path against load-path and install-path of all already loaded images
uint32_t hash = ImageLoader::hash(path);
- //dyld::log("check() hash=%d, path=%s\n", hash, path);
for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
ImageLoader* anImage = *it;
- // check hash first to cut down on strcmp calls
- //dyld::log(" check() hash=%d, path=%s\n", anImage->getPathHash(), anImage->getPath());
- if ( anImage->getPathHash() == hash ) {
+ // check has first to cut down on strcmp calls
+ if ( anImage->getPathHash() == hash )
if ( strcmp(path, anImage->getPath()) == 0 ) {
// if we are looking for a dylib don't return something else
if ( !context.mustBeDylib || anImage->isDylib() )
return anImage;
}
- }
if ( context.matchByInstallName || anImage->matchInstallPath() ) {
const char* installPath = anImage->getInstallPath();
if ( installPath != NULL) {
@@ -2722,16 +1686,6 @@
}
}
}
- // an install name starting with @rpath should match by install name, not just real path
- if ( (orgPath[0] == '@') && (strncmp(orgPath, "@rpath/", 7) == 0) ) {
- const char* installPath = anImage->getInstallPath();
- if ( installPath != NULL) {
- if ( !context.mustBeDylib || anImage->isDylib() ) {
- if ( strcmp(orgPath, installPath) == 0 )
- return anImage;
- }
- }
- }
}
//dyld::log("%s(%s) => NULL\n", __func__, path);
@@ -2740,53 +1694,45 @@
// open or check existing
-static ImageLoader* loadPhase5(const char* path, const char* orgPath, const LoadContext& context, std::vector<const char*>* exceptions)
+static ImageLoader* loadPhase5(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
{
//dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
-
- // check for specific dylib overrides
- for (std::vector<DylibOverride>::iterator it = sDylibOverrides.begin(); it != sDylibOverrides.end(); ++it) {
- if ( strcmp(it->installName, path) == 0 ) {
- path = it->override;
- break;
- }
- }
-
if ( exceptions != NULL )
- return loadPhase5load(path, orgPath, context, exceptions);
+ return loadPhase5open(path, context, exceptions);
else
- return loadPhase5check(path, orgPath, context);
+ return loadPhase5check(path, context);
}
// try with and without image suffix
-static ImageLoader* loadPhase4(const char* path, const char* orgPath, const LoadContext& context, std::vector<const char*>* exceptions)
+static ImageLoader* loadPhase4(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
{
//dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
ImageLoader* image = NULL;
if ( gLinkContext.imageSuffix != NULL ) {
char pathWithSuffix[strlen(path)+strlen( gLinkContext.imageSuffix)+2];
ImageLoader::addSuffix(path, gLinkContext.imageSuffix, pathWithSuffix);
- image = loadPhase5(pathWithSuffix, orgPath, context, exceptions);
+ image = loadPhase5(pathWithSuffix, context, exceptions);
}
if ( image == NULL )
- image = loadPhase5(path, orgPath, context, exceptions);
+ image = loadPhase5(path, context, exceptions);
return image;
}
-static ImageLoader* loadPhase2(const char* path, const char* orgPath, const LoadContext& context,
+static ImageLoader* loadPhase2(const char* path, const LoadContext& context,
const char* const frameworkPaths[], const char* const libraryPaths[],
std::vector<const char*>* exceptions); // forward reference
// expand @ variables
-static ImageLoader* loadPhase3(const char* path, const char* orgPath, const LoadContext& context, std::vector<const char*>* exceptions)
+static ImageLoader* loadPhase3(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
{
//dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
ImageLoader* image = NULL;
if ( strncmp(path, "@executable_path/", 17) == 0 ) {
// executable_path cannot be in used in any binary in a setuid process rdar://problem/4589305
- if ( sProcessIsRestricted && !sProcessRequiresLibraryValidation )
- throwf("unsafe use of @executable_path in %s with restricted binary", context.origin);
+ if ( sMainExecutableIsSetuid ) {
+ throwf("unsafe use of @executable_path in %s with setuid binary", context.origin);
+ }
// handle @executable_path path prefix
const char* executablePath = sExecPath;
char newPath[strlen(executablePath) + strlen(path)];
@@ -2796,7 +1742,7 @@
strcpy(&addPoint[1], &path[17]);
else
strcpy(newPath, &path[17]);
- image = loadPhase4(newPath, orgPath, context, exceptions);
+ image = loadPhase4(newPath, context, exceptions);
if ( image != NULL )
return image;
@@ -2810,15 +1756,16 @@
strcpy(&addPoint[1], &path[17]);
else
strcpy(newRealPath, &path[17]);
- image = loadPhase4(newRealPath, orgPath, context, exceptions);
+ image = loadPhase4(newRealPath, context, exceptions);
if ( image != NULL )
return image;
}
}
else if ( (strncmp(path, "@loader_path/", 13) == 0) && (context.origin != NULL) ) {
// @loader_path cannot be used from the main executable of a setuid process rdar://problem/4589305
- if ( sProcessIsRestricted && (strcmp(context.origin, sExecPath) == 0) && !sProcessRequiresLibraryValidation )
- throwf("unsafe use of @loader_path in %s with restricted binary", context.origin);
+ if ( sMainExecutableIsSetuid && (strcmp(context.origin, sExecPath) == 0) )
+ throwf("unsafe use of @loader_path in %s with setuid binary", context.origin);
+
// handle @loader_path path prefix
char newPath[strlen(context.origin) + strlen(path)];
strcpy(newPath, context.origin);
@@ -2827,7 +1774,7 @@
strcpy(&addPoint[1], &path[13]);
else
strcpy(newPath, &path[13]);
- image = loadPhase4(newPath, orgPath, context, exceptions);
+ image = loadPhase4(newPath, context, exceptions);
if ( image != NULL )
return image;
@@ -2841,7 +1788,7 @@
strcpy(&addPoint[1], &path[13]);
else
strcpy(newRealPath, &path[13]);
- image = loadPhase4(newRealPath, orgPath, context, exceptions);
+ image = loadPhase4(newRealPath, context, exceptions);
if ( image != NULL )
return image;
}
@@ -2857,13 +1804,7 @@
strcpy(newPath, anRPath);
strcat(newPath, "/");
strcat(newPath, trailingPath);
- image = loadPhase4(newPath, orgPath, context, exceptions);
- if ( gLinkContext.verboseRPaths && (exceptions != NULL) ) {
- if ( image != NULL )
- dyld::log("RPATH successful expansion of %s to: %s\n", orgPath, newPath);
- else
- dyld::log("RPATH failed to expanding %s to: %s\n", orgPath, newPath);
- }
+ image = loadPhase4(newPath, context, exceptions);
if ( image != NULL )
return image;
}
@@ -2872,7 +1813,7 @@
// substitute @rpath with LD_LIBRARY_PATH
if ( sEnv.LD_LIBRARY_PATH != NULL ) {
- image = loadPhase2(trailingPath, orgPath, context, NULL, sEnv.LD_LIBRARY_PATH, exceptions);
+ image = loadPhase2(trailingPath, context, NULL, sEnv.LD_LIBRARY_PATH, exceptions);
if ( image != NULL )
return image;
}
@@ -2881,16 +1822,16 @@
if ( (exceptions != NULL) && (trailingPath != path) )
return NULL;
}
- else if (sProcessIsRestricted && (path[0] != '/' ) && !sProcessRequiresLibraryValidation) {
- throwf("unsafe use of relative rpath %s in %s with restricted binary", path, context.origin);
- }
-
- return loadPhase4(path, orgPath, context, exceptions);
+ else if ( sMainExecutableIsSetuid && (path[0] != '/') ) {
+ throwf("unsafe use of relative rpath %s in %s with setuid binary", path, context.origin);
+ }
+
+ return loadPhase4(path, context, exceptions);
}
// try search paths
-static ImageLoader* loadPhase2(const char* path, const char* orgPath, const LoadContext& context,
+static ImageLoader* loadPhase2(const char* path, const LoadContext& context,
const char* const frameworkPaths[], const char* const libraryPaths[],
std::vector<const char*>* exceptions)
{
@@ -2899,31 +1840,29 @@
const char* frameworkPartialPath = getFrameworkPartialPath(path);
if ( frameworkPaths != NULL ) {
if ( frameworkPartialPath != NULL ) {
- const size_t frameworkPartialPathLen = strlen(frameworkPartialPath);
+ const int frameworkPartialPathLen = strlen(frameworkPartialPath);
for(const char* const* fp = frameworkPaths; *fp != NULL; ++fp) {
char npath[strlen(*fp)+frameworkPartialPathLen+8];
strcpy(npath, *fp);
strcat(npath, "/");
strcat(npath, frameworkPartialPath);
//dyld::log("dyld: fallback framework path used: %s() -> loadPhase4(\"%s\", ...)\n", __func__, npath);
- image = loadPhase4(npath, orgPath, context, exceptions);
+ image = loadPhase4(npath, context, exceptions);
if ( image != NULL )
return image;
}
}
}
- // <rdar://problem/12649639> An executable with the same name as a framework & DYLD_LIBRARY_PATH pointing to it gets loaded twice
- // <rdar://problem/14160846> Some apps depend on frameworks being found via library paths
- if ( (libraryPaths != NULL) && ((frameworkPartialPath == NULL) || sFrameworksFoundAsDylibs) ) {
+ if ( libraryPaths != NULL ) {
const char* libraryLeafName = getLibraryLeafName(path);
- const size_t libraryLeafNameLen = strlen(libraryLeafName);
+ const int libraryLeafNameLen = strlen(libraryLeafName);
for(const char* const* lp = libraryPaths; *lp != NULL; ++lp) {
char libpath[strlen(*lp)+libraryLeafNameLen+8];
strcpy(libpath, *lp);
strcat(libpath, "/");
strcat(libpath, libraryLeafName);
//dyld::log("dyld: fallback library path used: %s() -> loadPhase4(\"%s\", ...)\n", __func__, libpath);
- image = loadPhase4(libpath, orgPath, context, exceptions);
+ image = loadPhase4(libpath, context, exceptions);
if ( image != NULL )
return image;
}
@@ -2932,36 +1871,33 @@
}
// try search overrides and fallbacks
-static ImageLoader* loadPhase1(const char* path, const char* orgPath, const LoadContext& context, std::vector<const char*>* exceptions)
+static ImageLoader* loadPhase1(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
{
//dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
ImageLoader* image = NULL;
// handle LD_LIBRARY_PATH environment variables that force searching
if ( context.useLdLibraryPath && (sEnv.LD_LIBRARY_PATH != NULL) ) {
- image = loadPhase2(path, orgPath, context, NULL, sEnv.LD_LIBRARY_PATH, exceptions);
+ image = loadPhase2(path, context, NULL, sEnv.LD_LIBRARY_PATH, exceptions);
if ( image != NULL )
return image;
}
// handle DYLD_ environment variables that force searching
if ( context.useSearchPaths && ((sEnv.DYLD_FRAMEWORK_PATH != NULL) || (sEnv.DYLD_LIBRARY_PATH != NULL)) ) {
- image = loadPhase2(path, orgPath, context, sEnv.DYLD_FRAMEWORK_PATH, sEnv.DYLD_LIBRARY_PATH, exceptions);
+ image = loadPhase2(path, context, sEnv.DYLD_FRAMEWORK_PATH, sEnv.DYLD_LIBRARY_PATH, exceptions);
if ( image != NULL )
return image;
}
// try raw path
- image = loadPhase3(path, orgPath, context, exceptions);
+ image = loadPhase3(path, context, exceptions);
if ( image != NULL )
return image;
// try fallback paths during second time (will open file)
- const char* const* fallbackLibraryPaths = sEnv.DYLD_FALLBACK_LIBRARY_PATH;
- if ( (fallbackLibraryPaths != NULL) && !context.useFallbackPaths )
- fallbackLibraryPaths = NULL;
- if ( !context.dontLoad && (exceptions != NULL) && ((sEnv.DYLD_FALLBACK_FRAMEWORK_PATH != NULL) || (fallbackLibraryPaths != NULL)) ) {
- image = loadPhase2(path, orgPath, context, sEnv.DYLD_FALLBACK_FRAMEWORK_PATH, fallbackLibraryPaths, exceptions);
+ if ( !context.dontLoad && (exceptions != NULL) && ((sEnv.DYLD_FALLBACK_FRAMEWORK_PATH != NULL) || (sEnv.DYLD_FALLBACK_LIBRARY_PATH != NULL)) ) {
+ image = loadPhase2(path, context, sEnv.DYLD_FALLBACK_FRAMEWORK_PATH, sEnv.DYLD_FALLBACK_LIBRARY_PATH, exceptions);
if ( image != NULL )
return image;
}
@@ -2970,35 +1906,25 @@
}
// try root substitutions
-static ImageLoader* loadPhase0(const char* path, const char* orgPath, const LoadContext& context, std::vector<const char*>* exceptions)
+static ImageLoader* loadPhase0(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
{
//dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
// handle DYLD_ROOT_PATH which forces absolute paths to use a new root
- if ( (gLinkContext.rootPaths != NULL) && (path[0] == '/') ) {
- for(const char* const* rootPath = gLinkContext.rootPaths ; *rootPath != NULL; ++rootPath) {
+ if ( (sEnv.DYLD_ROOT_PATH != NULL) && (path[0] == '/') ) {
+ for(const char* const* rootPath = sEnv.DYLD_ROOT_PATH ; *rootPath != NULL; ++rootPath) {
char newPath[strlen(*rootPath) + strlen(path)+2];
strcpy(newPath, *rootPath);
strcat(newPath, path);
- ImageLoader* image = loadPhase1(newPath, orgPath, context, exceptions);
+ ImageLoader* image = loadPhase1(newPath, context, exceptions);
if ( image != NULL )
return image;
}
}
// try raw path
- return loadPhase1(path, orgPath, context, exceptions);
-}
-
-#if DYLD_SHARED_CACHE_SUPPORT
- static bool cacheablePath(const char* path) {
- if (strncmp(path, "/usr/lib/", 9) == 0)
- return true;
- if (strncmp(path, "/System/Library/", 16) == 0)
- return true;
- return false;
- }
-#endif
+ return loadPhase1(path, context, exceptions);
+}
//
// Given all the DYLD_ environment variables, the general case for loading libraries
@@ -3016,9 +1942,6 @@
//
ImageLoader* load(const char* path, const LoadContext& context)
{
- CRSetCrashLogMessage2(path);
- const char* orgPath = path;
-
//dyld::log("%s(%s)\n", __func__ , path);
char realPath[PATH_MAX];
// when DYLD_IMAGE_SUFFIX is in used, do a realpath(), otherwise a load of "Foo.framework/Foo" will not match
@@ -3028,73 +1951,26 @@
}
// try all path permutations and check against existing loaded images
- ImageLoader* image = loadPhase0(path, orgPath, context, NULL);
- if ( image != NULL ) {
- CRSetCrashLogMessage2(NULL);
+ ImageLoader* image = loadPhase0(path, context, NULL);
+ if ( image != NULL )
return image;
- }
-
- // try all path permutations and try open() until first success
+
+ // try all path permutations and try open() until first sucesss
std::vector<const char*> exceptions;
- image = loadPhase0(path, orgPath, context, &exceptions);
-#if __IPHONE_OS_VERSION_MIN_REQUIRED && DYLD_SHARED_CACHE_SUPPORT && !TARGET_IPHONE_SIMULATOR
- // <rdar://problem/16704628> support symlinks on disk to a path in dyld shared cache
- if ( (image == NULL) && cacheablePath(path) && !context.dontLoad ) {
- char resolvedPath[PATH_MAX];
- realpath(path, resolvedPath);
- int myerr = errno;
- // If realpath() resolves to a path which does not exist on disk, errno is set to ENOENT
- if ( (myerr == ENOENT) || (myerr == 0) )
- {
- // see if this image is in shared cache
- const macho_header* mhInCache;
- const char* pathInCache;
- long slideInCache;
- if ( findInSharedCacheImage(resolvedPath, false, NULL, &mhInCache, &pathInCache, &slideInCache) ) {
- struct stat stat_buf;
- bzero(&stat_buf, sizeof(stat_buf));
- try {
- image = ImageLoaderMachO::instantiateFromCache(mhInCache, pathInCache, slideInCache, stat_buf, gLinkContext);
- image = checkandAddImage(image, context);
- }
- catch (...) {
- image = NULL;
- }
- }
- }
- }
-#endif
- CRSetCrashLogMessage2(NULL);
- if ( image != NULL ) {
- // <rdar://problem/6916014> leak in dyld during dlopen when using DYLD_ variables
- for (std::vector<const char*>::iterator it = exceptions.begin(); it != exceptions.end(); ++it) {
- free((void*)(*it));
- }
-#if DYLD_SHARED_CACHE_SUPPORT
- // if loaded image is not from cache, but original path is in cache
- // set gSharedCacheOverridden flag to disable some ObjC optimizations
- if ( !gSharedCacheOverridden && !image->inSharedCache() && image->isDylib() && cacheablePath(path) && inSharedCache(path) ) {
- gSharedCacheOverridden = true;
- }
-#endif
+ image = loadPhase0(path, context, &exceptions);
+ if ( image != NULL )
return image;
- }
- else if ( exceptions.size() == 0 ) {
- if ( context.dontLoad ) {
- return NULL;
- }
- else
- throw "image not found";
- }
+ else if ( exceptions.size() == 0 )
+ throw "image not found";
else {
const char* msgStart = "no suitable image found. Did find:";
const char* delim = "\n\t";
size_t allsizes = strlen(msgStart)+8;
- for (size_t i=0; i < exceptions.size(); ++i)
+ for (unsigned int i=0; i < exceptions.size(); ++i)
allsizes += (strlen(exceptions[i]) + strlen(delim));
char* fullMsg = new char[allsizes];
strcpy(fullMsg, msgStart);
- for (size_t i=0; i < exceptions.size(); ++i) {
+ for (unsigned int i=0; i < exceptions.size(); ++i) {
strcat(fullMsg, delim);
strcat(fullMsg, exceptions[i]);
free((void*)exceptions[i]);
@@ -3105,82 +1981,54 @@
+
#if DYLD_SHARED_CACHE_SUPPORT
-
-#if __i386__
- #define ARCH_NAME "i386"
- #define ARCH_CACHE_MAGIC "dyld_v1 i386"
-#elif __x86_64__
- #define ARCH_NAME "x86_64"
- #define ARCH_CACHE_MAGIC "dyld_v1 x86_64"
- #define ARCH_NAME_H "x86_64h"
- #define ARCH_CACHE_MAGIC_H "dyld_v1 x86_64h"
-#elif __ARM_ARCH_5TEJ__
- #define ARCH_NAME "armv5"
- #define ARCH_CACHE_MAGIC "dyld_v1 armv5"
-#elif __ARM_ARCH_6K__
- #define ARCH_NAME "armv6"
- #define ARCH_CACHE_MAGIC "dyld_v1 armv6"
-#elif __ARM_ARCH_7F__
- #define ARCH_NAME "armv7f"
- #define ARCH_CACHE_MAGIC "dyld_v1 armv7f"
-#elif __ARM_ARCH_7K__
- #define ARCH_NAME "armv7k"
- #define ARCH_CACHE_MAGIC "dyld_v1 armv7k"
-#elif __ARM_ARCH_7A__
- #define ARCH_NAME "armv7"
- #define ARCH_CACHE_MAGIC "dyld_v1 armv7"
-#elif __ARM_ARCH_7S__
- #define ARCH_NAME "armv7s"
- #define ARCH_CACHE_MAGIC "dyld_v1 armv7s"
-#elif __arm64__
- #define ARCH_NAME "arm64"
- #define ARCH_CACHE_MAGIC "dyld_v1 arm64"
-#endif
+// hack until dyld no longer needs to run on Leopard kernels that don't have new shared region syscall
+static bool newSharedRegionSyscallAvailable()
+{
+ int shreg_version;
+ size_t buffer_size = sizeof(shreg_version);
+ if ( sysctlbyname("vm.shared_region_version", &shreg_version, &buffer_size, NULL, 0) == 0 ) {
+ if ( shreg_version == 3 )
+ return true;
+ }
+ return false;
+}
static int __attribute__((noinline)) _shared_region_check_np(uint64_t* start_address)
{
- if ( gLinkContext.sharedRegionMode == ImageLoader::kUseSharedRegion )
+ if ( (gLinkContext.sharedRegionMode == ImageLoader::kUseSharedRegion) && newSharedRegionSyscallAvailable() )
return syscall(294, start_address);
return -1;
}
-static int __attribute__((noinline)) _shared_region_map_and_slide_np(int fd, uint32_t count, const shared_file_mapping_np mappings[],
- int codeSignatureMappingIndex, long slide, void* slideInfo, unsigned long slideInfoSize)
-{
- // register code signature blob for whole dyld cache
- if ( codeSignatureMappingIndex != -1 ) {
- fsignatures_t siginfo;
- siginfo.fs_file_start = 0; // cache always starts at beginning of file
- siginfo.fs_blob_start = (void*)mappings[codeSignatureMappingIndex].sfm_file_offset;
- siginfo.fs_blob_size = mappings[codeSignatureMappingIndex].sfm_size;
- int result = fcntl(fd, F_ADDFILESIGS, &siginfo);
- // <rdar://problem/12891874> don't warn in chrooted case because mapping syscall is about to fail too
- if ( (result == -1) && gLinkContext.verboseMapping )
- dyld::log("dyld: code signature registration for shared cache failed with errno=%d\n", errno);
- }
-
- if ( gLinkContext.sharedRegionMode == ImageLoader::kUseSharedRegion ) {
- return syscall(438, fd, count, mappings, slide, slideInfo, slideInfoSize);
+static int __attribute__((noinline)) _shared_region_map_np(int fd, uint32_t count, const shared_file_mapping_np mappings[])
+{
+ int result;
+ if ( (gLinkContext.sharedRegionMode == ImageLoader::kUseSharedRegion) && newSharedRegionSyscallAvailable() ) {
+ return syscall(295, fd, count, mappings);
}
// remove the shared region sub-map
- vm_deallocate(mach_task_self(), (vm_address_t)SHARED_REGION_BASE, SHARED_REGION_SIZE);
-
- // notify gdb or other lurkers that this process is no longer using the shared region
- dyld::gProcessInfo->processDetachedFromSharedRegion = true;
-
+#if __ppc__ || __i386__
+ vm_address_t addr = (vm_address_t)0x90000000;
+ vm_deallocate(mach_task_self(), addr, 0x20000000);
+#elif __ppc64__ || __x86_64__
+ vm_address_t addr = (vm_address_t)0x7FFF60000000;
+ vm_deallocate(mach_task_self(), addr, 0x80000000);
+#endif
+
// map cache just for this process with mmap()
- const shared_file_mapping_np* const start = mappings;
- const shared_file_mapping_np* const end = &mappings[count];
+ bool failed = false;
+ const shared_file_mapping_np* start = mappings;
+ const shared_file_mapping_np* end = &mappings[count];
for (const shared_file_mapping_np* p = start; p < end; ++p ) {
void* mmapAddress = (void*)(uintptr_t)(p->sfm_address);
size_t size = p->sfm_size;
- //dyld::log("dyld: mapping address %p with size 0x%08lX\n", mmapAddress, size);
int protection = 0;
if ( p->sfm_init_prot & VM_PROT_EXECUTE )
protection |= PROT_EXEC;
@@ -3189,392 +2037,113 @@
if ( p->sfm_init_prot & VM_PROT_WRITE )
protection |= PROT_WRITE;
off_t offset = p->sfm_file_offset;
- if ( mmap(mmapAddress, size, protection, MAP_FIXED | MAP_PRIVATE, fd, offset) != mmapAddress ) {
- // failed to map some chunk of this shared cache file
- // clear shared region
- vm_deallocate(mach_task_self(), (vm_address_t)SHARED_REGION_BASE, SHARED_REGION_SIZE);
- // go back to not using shared region at all
- gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
- if ( gLinkContext.verboseMapping ) {
- dyld::log("dyld: shared cached region cannot be mapped at address %p with size 0x%08lX\n",
- mmapAddress, size);
- }
- // return failure
- return -1;
- }
- }
-
- // update all __DATA pages with slide info
- if ( slide != 0 ) {
- const uintptr_t dataPagesStart = mappings[1].sfm_address;
- const dyld_cache_slide_info* slideInfoHeader = (dyld_cache_slide_info*)slideInfo;
- const uint16_t* toc = (uint16_t*)((long)(slideInfoHeader) + slideInfoHeader->toc_offset);
- const uint8_t* entries = (uint8_t*)((long)(slideInfoHeader) + slideInfoHeader->entries_offset);
- for(uint32_t i=0; i < slideInfoHeader->toc_count; ++i) {
- const uint8_t* entry = &entries[toc[i]*slideInfoHeader->entries_size];
- const uint8_t* page = (uint8_t*)(long)(dataPagesStart + (4096*i));
- //dyld::log("page=%p toc[%d]=%d entries=%p\n", page, i, toc[i], entry);
- for(int j=0; j < 128; ++j) {
- uint8_t b = entry[j];
- //dyld::log(" entry[%d] = 0x%02X\n", j, b);
- if ( b != 0 ) {
- for(int k=0; k < 8; ++k) {
- if ( b & (1<<k) ) {
- uintptr_t* p = (uintptr_t*)(page + j*8*4 + k*4);
- uintptr_t value = *p;
- //dyld::log(" *%p was 0x%lX will be 0x%lX\n", p, value, value+sSharedCacheSlide);
- *p = value + slide;
- }
- }
- }
- }
- }
- }
-
- // succesfully mapped shared cache for just this process
- gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
-
- return 0;
-}
-
-
-const void* imMemorySharedCacheHeader()
-{
- return sSharedCache;
-}
-
-const char* getStandardSharedCacheFilePath()
-{
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
- return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME;
-#else
- #if __x86_64__
- if ( sHaswell ) {
- const char* path2 = MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME_H;
- struct stat statBuf;
- if ( my_stat(path2, &statBuf) == 0 )
- return path2;
- }
- #endif
- return MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME;
-#endif
-}
-
-int openSharedCacheFile()
-{
- char path[MAXPATHLEN];
- strlcpy(path, sSharedCacheDir, MAXPATHLEN);
- strlcat(path, "/", MAXPATHLEN);
-#if __x86_64__
- if ( sHaswell ) {
- strlcat(path, DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME_H, MAXPATHLEN);
- int fd = my_open(path, O_RDONLY, 0);
- if ( fd != -1 ) {
- if ( gLinkContext.verboseMapping )
- dyld::log("dyld: Mapping%s shared cache from %s\n", (gLinkContext.sharedRegionMode == ImageLoader::kUsePrivateSharedRegion) ? " private": "", path);
- return fd;
- }
- strlcpy(path, sSharedCacheDir, MAXPATHLEN);
- }
-#endif
- strlcat(path, DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME, MAXPATHLEN);
- if ( gLinkContext.verboseMapping )
- dyld::log("dyld: Mapping%s shared cache from %s\n", (gLinkContext.sharedRegionMode == ImageLoader::kUsePrivateSharedRegion) ? " private": "", path);
- return my_open(path, O_RDONLY, 0);
-}
-
-
-static void getCacheBounds(uint32_t mappingsCount, const shared_file_mapping_np mappings[], uint64_t& lowAddress, uint64_t& highAddress)
-{
- lowAddress = 0;
- highAddress = 0;
- for(uint32_t i=0; i < mappingsCount; ++i) {
- if ( lowAddress == 0 ) {
- lowAddress = mappings[i].sfm_address;
- highAddress = mappings[i].sfm_address + mappings[i].sfm_size;
- }
- else {
- if ( mappings[i].sfm_address < lowAddress )
- lowAddress = mappings[i].sfm_address;
- if ( (mappings[i].sfm_address + mappings[i].sfm_size) > highAddress )
- highAddress = mappings[i].sfm_address + mappings[i].sfm_size;
- }
- }
-}
-
-static long pickCacheSlide(uint32_t mappingsCount, shared_file_mapping_np mappings[])
-{
-#if __x86_64__
- // x86_64 has a two memory regions:
- // 256MB at 0x00007FFF70000000
- // 1024MB at 0x00007FFF80000000
- // Some old shared caches have r/w region after rx region, so all regions slide within 1GB range
- // Newer shared caches have r/w region based at 0x7FFF70000000 and r/o regions at 0x7FFF80000000, so each part has max slide
- if ( (mappingsCount >= 3) && (mappings[1].sfm_init_prot == (VM_PROT_READ|VM_PROT_WRITE)) && (mappings[1].sfm_address == 0x00007FFF70000000) ) {
- const uint64_t rwSize = mappings[1].sfm_size;
- const uint64_t rwSlop = 0x10000000ULL - rwSize;
- const uint64_t roSize = (mappings[2].sfm_address + mappings[2].sfm_size) - mappings[0].sfm_address;
- const uint64_t roSlop = 0x40000000ULL - roSize;
- const uint64_t space = (rwSlop < roSlop) ? rwSlop : roSlop;
-
- // choose new random slide
- long slide = (arc4random() % space) & (-4096);
- //dyld::log("rwSlop=0x%0llX, roSlop=0x%0llX\n", rwSlop, roSlop);
- //dyld::log("space=0x%0llX, slide=0x%0lX\n", space, slide);
-
- // update mappings
- for(uint32_t i=0; i < mappingsCount; ++i) {
- mappings[i].sfm_address += slide;
- }
-
- return slide;
- }
- // else fall through to handle old style cache
-#endif
- // get bounds of cache
- uint64_t lowAddress;
- uint64_t highAddress;
- getCacheBounds(mappingsCount, mappings, lowAddress, highAddress);
-
- // find slop space
- const uint64_t space = (SHARED_REGION_BASE + SHARED_REGION_SIZE) - highAddress;
-
- // choose new random slide
- long slide = dyld_page_trunc(arc4random() % space);
- //dyld::log("slideSpace=0x%0llX\n", space);
- //dyld::log("slide=0x%0lX\n", slide);
-
- // update mappings
- for(uint32_t i=0; i < mappingsCount; ++i) {
- mappings[i].sfm_address += slide;
- }
-
- return slide;
-}
+ mmapAddress = mmap(mmapAddress, size, protection, MAP_FIXED | MAP_PRIVATE, fd, offset);
+ if ( mmap(mmapAddress, size, protection, MAP_FIXED | MAP_PRIVATE, fd, offset) != mmapAddress )
+ failed = true;
+ }
+ if ( !failed ) {
+ result = 0;
+ gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
+ }
+ else {
+ result = -1;
+ gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
+ if ( gLinkContext.verboseMapping )
+ dyld::log("dyld: shared cached cannot be mapped\n");
+ }
+
+ return result;
+}
+
+
+
+#if __ppc__
+ #define ARCH_NAME "ppc"
+ #define ARCH_NAME_ROSETTA "rosetta"
+ #define ARCH_VALUE CPU_TYPE_POWERPC
+ #define ARCH_CACHE_MAGIC "dyld_v1 ppc"
+#elif __ppc64__
+ #define ARCH_NAME "ppc64"
+ #define ARCH_VALUE CPU_TYPE_POWERPC64
+ #define ARCH_CACHE_MAGIC "dyld_v1 ppc64"
+#elif __i386__
+ #define ARCH_NAME "i386"
+ #define ARCH_VALUE CPU_TYPE_I386
+ #define ARCH_CACHE_MAGIC "dyld_v1 i386"
+#elif __x86_64__
+ #define ARCH_NAME "x86_64"
+ #define ARCH_VALUE CPU_TYPE_X86_64
+ #define ARCH_CACHE_MAGIC "dyld_v1 x86_64"
+#endif
+
static void mapSharedCache()
-{
- uint64_t cacheBaseAddress = 0;
- // quick check if a cache is already mapped into shared region
+{
+ uint64_t cacheBaseAddress;
+ // quick check if a cache is alreay mapped into shared region
if ( _shared_region_check_np(&cacheBaseAddress) == 0 ) {
sSharedCache = (dyld_cache_header*)cacheBaseAddress;
// if we don't understand the currently mapped shared cache, then ignore
-#if __x86_64__
- const char* magic = (sHaswell ? ARCH_CACHE_MAGIC_H : ARCH_CACHE_MAGIC);
-#else
- const char* magic = ARCH_CACHE_MAGIC;
-#endif
- if ( strcmp(sSharedCache->magic, magic) != 0 ) {
+ if ( strcmp(sSharedCache->magic, ARCH_CACHE_MAGIC) != 0 ) {
sSharedCache = NULL;
- if ( gLinkContext.verboseMapping ) {
+ if ( gLinkContext.verboseMapping )
dyld::log("dyld: existing shared cached in memory is not compatible\n");
- return;
- }
- }
- // check if cache file is slidable
- const dyld_cache_header* header = sSharedCache;
- if ( (header->mappingOffset >= 0x48) && (header->slideInfoSize != 0) ) {
- // solve for slide by comparing loaded address to address of first region
- const uint8_t* loadedAddress = (uint8_t*)sSharedCache;
- const dyld_cache_mapping_info* const mappings = (dyld_cache_mapping_info*)(loadedAddress+header->mappingOffset);
- const uint8_t* preferedLoadAddress = (uint8_t*)(long)(mappings[0].address);
- sSharedCacheSlide = loadedAddress - preferedLoadAddress;
- dyld::gProcessInfo->sharedCacheSlide = sSharedCacheSlide;
- //dyld::log("sSharedCacheSlide=0x%08lX, loadedAddress=%p, preferedLoadAddress=%p\n", sSharedCacheSlide, loadedAddress, preferedLoadAddress);
- }
- // if cache has a uuid, copy it
- if ( header->mappingOffset >= 0x68 ) {
- memcpy(dyld::gProcessInfo->sharedCacheUUID, header->uuid, 16);
- }
- // verbose logging
- if ( gLinkContext.verboseMapping ) {
- dyld::log("dyld: re-using existing shared cache mapping\n");
}
}
else {
-#if __i386__ || __x86_64__
- // <rdar://problem/5925940> Safe Boot should disable dyld shared cache
- // if we are in safe-boot mode and the cache was not made during this boot cycle,
- // delete the cache file
- uint32_t safeBootValue = 0;
- size_t safeBootValueSize = sizeof(safeBootValue);
- if ( (sysctlbyname("kern.safeboot", &safeBootValue, &safeBootValueSize, NULL, 0) == 0) && (safeBootValue != 0) ) {
- // user booted machine in safe-boot mode
- struct stat dyldCacheStatInfo;
- // Don't use custom DYLD_SHARED_CACHE_DIR if provided, use standard path
- if ( my_stat(MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME, &dyldCacheStatInfo) == 0 ) {
- struct timeval bootTimeValue;
- size_t bootTimeValueSize = sizeof(bootTimeValue);
- if ( (sysctlbyname("kern.boottime", &bootTimeValue, &bootTimeValueSize, NULL, 0) == 0) && (bootTimeValue.tv_sec != 0) ) {
- // if the cache file was created before this boot, then throw it away and let it rebuild itself
- if ( dyldCacheStatInfo.st_mtime < bootTimeValue.tv_sec ) {
- ::unlink(MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME);
- gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
- return;
- }
- }
- }
- }
-#endif
// map in shared cache to shared region
- int fd = openSharedCacheFile();
+ int fd;
+#if __ppc__
+ // rosetta cannot handle optimized _ppc cache, so it use _rosetta cache instead, rdar://problem/5495438
+ if ( isRosetta() )
+ fd = open(DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME_ROSETTA, O_RDONLY);
+ else
+#endif
+ fd = open(DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME, O_RDONLY);
if ( fd != -1 ) {
- uint8_t firstPages[8192];
- if ( ::read(fd, firstPages, 8192) == 8192 ) {
- dyld_cache_header* header = (dyld_cache_header*)firstPages;
- #if __x86_64__
- const char* magic = (sHaswell ? ARCH_CACHE_MAGIC_H : ARCH_CACHE_MAGIC);
- #else
- const char* magic = ARCH_CACHE_MAGIC;
- #endif
- if ( strcmp(header->magic, magic) == 0 ) {
- const dyld_cache_mapping_info* const fileMappingsStart = (dyld_cache_mapping_info*)&firstPages[header->mappingOffset];
- const dyld_cache_mapping_info* const fileMappingsEnd = &fileMappingsStart[header->mappingCount];
- shared_file_mapping_np mappings[header->mappingCount+1]; // add room for code-sig
- unsigned int mappingCount = header->mappingCount;
- int codeSignatureMappingIndex = -1;
- int readWriteMappingIndex = -1;
- int readOnlyMappingIndex = -1;
+ uint8_t firstPage[4096];
+ if ( ::read(fd, firstPage, 4096) == 4096 ) {
+ dyld_cache_header* header = (dyld_cache_header*)firstPage;
+ if ( strcmp(header->magic, ARCH_CACHE_MAGIC) == 0 ) {
+ const shared_file_mapping_np* mappings = (shared_file_mapping_np*)&firstPage[header->mappingOffset];
+ const shared_file_mapping_np* const end = &mappings[header->mappingCount];
// validate that the cache file has not been truncated
bool goodCache = false;
struct stat stat_buf;
if ( fstat(fd, &stat_buf) == 0 ) {
goodCache = true;
- int i=0;
- for (const dyld_cache_mapping_info* p = fileMappingsStart; p < fileMappingsEnd; ++p, ++i) {
- mappings[i].sfm_address = p->address;
- mappings[i].sfm_size = p->size;
- mappings[i].sfm_file_offset = p->fileOffset;
- mappings[i].sfm_max_prot = p->maxProt;
- mappings[i].sfm_init_prot = p->initProt;
- // rdar://problem/5694507 old update_dyld_shared_cache tool could make a cache file
- // that is not page aligned, but otherwise ok.
- if ( p->fileOffset+p->size > (uint64_t)(stat_buf.st_size+4095 & (-4096)) ) {
- dyld::log("dyld: shared cached file is corrupt: %s" DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME "\n", sSharedCacheDir);
+ for (const shared_file_mapping_np* p = mappings; p < end; ++p) {
+ if ( p->sfm_file_offset+p->sfm_size > (uint64_t)stat_buf.st_size )
goodCache = false;
- }
- if ( (mappings[i].sfm_init_prot & (VM_PROT_READ|VM_PROT_WRITE)) == (VM_PROT_READ|VM_PROT_WRITE) ) {
- readWriteMappingIndex = i;
- }
- if ( mappings[i].sfm_init_prot == VM_PROT_READ ) {
- readOnlyMappingIndex = i;
- }
- }
- // if shared cache is code signed, add a mapping for the code signature
- uint64_t signatureSize = header->codeSignatureSize;
- // zero size in header means signature runs to end-of-file
- if ( signatureSize == 0 )
- signatureSize = stat_buf.st_size - header->codeSignatureOffset;
- if ( signatureSize != 0 ) {
- int linkeditMapping = mappingCount-1;
- codeSignatureMappingIndex = mappingCount++;
- mappings[codeSignatureMappingIndex].sfm_address = mappings[linkeditMapping].sfm_address + mappings[linkeditMapping].sfm_size;
-#if __arm__ || __arm64__
- mappings[codeSignatureMappingIndex].sfm_size = (signatureSize+16383) & (-16384);
-#else
- mappings[codeSignatureMappingIndex].sfm_size = (signatureSize+4095) & (-4096);
-#endif
- mappings[codeSignatureMappingIndex].sfm_file_offset = header->codeSignatureOffset;
- mappings[codeSignatureMappingIndex].sfm_max_prot = VM_PROT_READ;
- mappings[codeSignatureMappingIndex].sfm_init_prot = VM_PROT_READ;
}
}
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- // sanity check that /usr/lib/libSystem.B.dylib stat() info matches cache
- if ( header->imagesCount * sizeof(dyld_cache_image_info) + header->imagesOffset < 8192 ) {
- bool foundLibSystem = false;
- if ( my_stat("/usr/lib/libSystem.B.dylib", &stat_buf) == 0 ) {
- const dyld_cache_image_info* images = (dyld_cache_image_info*)&firstPages[header->imagesOffset];
- const dyld_cache_image_info* const imagesEnd = &images[header->imagesCount];
- for (const dyld_cache_image_info* p = images; p < imagesEnd; ++p) {
- if ( ((time_t)p->modTime == stat_buf.st_mtime) && ((ino_t)p->inode == stat_buf.st_ino) ) {
- foundLibSystem = true;
- break;
- }
- }
- }
- if ( !sSharedCacheIgnoreInodeAndTimeStamp && !foundLibSystem ) {
- dyld::log("dyld: shared cached file was built against a different libSystem.dylib, ignoring cache.\n"
- "to update dyld shared cache run: 'sudo update_dyld_shared_cache' then reboot.\n");
- goodCache = false;
+ if ( goodCache ) {
+ const shared_file_mapping_np* mappings = (shared_file_mapping_np*)&firstPage[header->mappingOffset];
+ if (_shared_region_map_np(fd, header->mappingCount, mappings) == 0) {
+ // sucessfully mapped cache into shared region
+ sSharedCache = (dyld_cache_header*)mappings[0].sfm_address;
}
}
-#endif
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
- {
- uint64_t lowAddress;
- uint64_t highAddress;
- getCacheBounds(mappingCount, mappings, lowAddress, highAddress);
- if ( (highAddress-lowAddress) > SHARED_REGION_SIZE )
- throw "dyld shared cache is too big to fit in shared region";
- }
-#endif
-
- if ( goodCache && (readWriteMappingIndex == -1) ) {
- dyld::log("dyld: shared cached file is missing read/write mapping: %s" DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME "\n", sSharedCacheDir);
- goodCache = false;
- }
- if ( goodCache && (readOnlyMappingIndex == -1) ) {
- dyld::log("dyld: shared cached file is missing read-only mapping: %s" DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME "\n", sSharedCacheDir);
- goodCache = false;
- }
- if ( goodCache ) {
- long cacheSlide = 0;
- void* slideInfo = NULL;
- uint64_t slideInfoSize = 0;
- // check if shared cache contains slid info
- if ( header->slideInfoSize != 0 ) {
- // <rdar://problem/8611968> don't slide shared cache if ASLR disabled (main executable didn't slide)
- if ( sMainExecutable->isPositionIndependentExecutable() && (sMainExecutable->getSlide() == 0) )
- cacheSlide = 0;
- else {
- // generate random slide amount
- cacheSlide = pickCacheSlide(mappingCount, mappings);
- slideInfo = (void*)(long)(mappings[readOnlyMappingIndex].sfm_address + (header->slideInfoOffset - mappings[readOnlyMappingIndex].sfm_file_offset));
- slideInfoSize = header->slideInfoSize;
- // add VM_PROT_SLIDE bit to __DATA area of cache
- mappings[readWriteMappingIndex].sfm_max_prot |= VM_PROT_SLIDE;
- mappings[readWriteMappingIndex].sfm_init_prot |= VM_PROT_SLIDE;
- }
- }
- if ( gLinkContext.verboseMapping ) {
- dyld::log("dyld: calling _shared_region_map_and_slide_np() with regions:\n");
- for (int i=0; i < mappingCount; ++i) {
- dyld::log(" address=0x%08llX, size=0x%08llX, fileOffset=0x%08llX\n", mappings[i].sfm_address, mappings[i].sfm_size, mappings[i].sfm_file_offset);
- }
- }
- if (_shared_region_map_and_slide_np(fd, mappingCount, mappings, codeSignatureMappingIndex, cacheSlide, slideInfo, slideInfoSize) == 0) {
- // successfully mapped cache into shared region
- sSharedCache = (dyld_cache_header*)mappings[0].sfm_address;
- sSharedCacheSlide = cacheSlide;
- dyld::gProcessInfo->sharedCacheSlide = cacheSlide;
- //dyld::log("sSharedCache=%p sSharedCacheSlide=0x%08lX\n", sSharedCache, sSharedCacheSlide);
- // if cache has a uuid, copy it
- if ( header->mappingOffset >= 0x68 ) {
- memcpy(dyld::gProcessInfo->sharedCacheUUID, header->uuid, 16);
- }
- }
- else {
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
- throw "dyld shared cache could not be mapped";
-#endif
- if ( gLinkContext.verboseMapping )
- dyld::log("dyld: shared cached file could not be mapped\n");
- }
+ else {
+ gSharedCacheNeedsUpdating = true;
+ dyld::log("dyld: shared cached file is corrupt: " DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME "\n");
}
}
else {
+ gSharedCacheNeedsUpdating = true;
if ( gLinkContext.verboseMapping )
dyld::log("dyld: shared cached file is invalid\n");
}
}
else {
+ gSharedCacheNeedsUpdating = true;
if ( gLinkContext.verboseMapping )
dyld::log("dyld: shared cached file cannot be read\n");
}
close(fd);
}
else {
+ gSharedCacheNotFound = true;
if ( gLinkContext.verboseMapping )
dyld::log("dyld: shared cached file cannot be opened\n");
}
@@ -3587,64 +2156,39 @@
// tell gdb where the shared cache is
if ( sSharedCache != NULL ) {
- const dyld_cache_mapping_info* const start = (dyld_cache_mapping_info*)((uint8_t*)sSharedCache + sSharedCache->mappingOffset);
+ const shared_file_mapping_np* const start = (shared_file_mapping_np*)((uint8_t*)sSharedCache + sSharedCache->mappingOffset);
dyld_shared_cache_ranges.sharedRegionsCount = sSharedCache->mappingCount;
// only room to tell gdb about first four regions
if ( dyld_shared_cache_ranges.sharedRegionsCount > 4 )
dyld_shared_cache_ranges.sharedRegionsCount = 4;
- const dyld_cache_mapping_info* const end = &start[dyld_shared_cache_ranges.sharedRegionsCount];
+ if ( gLinkContext.verboseMapping ) {
+ if ( gLinkContext.sharedRegionMode == ImageLoader::kUseSharedRegion )
+ dyld::log("dyld: Mapping shared cache\n");
+ else if ( gLinkContext.sharedRegionMode == ImageLoader::kUsePrivateSharedRegion )
+ dyld::log("dyld: Mapping private shared cache\n");
+ }
+ const shared_file_mapping_np* const end = &start[dyld_shared_cache_ranges.sharedRegionsCount];
int index = 0;
- for (const dyld_cache_mapping_info* p = start; p < end; ++p, ++index ) {
- dyld_shared_cache_ranges.ranges[index].start = p->address+sSharedCacheSlide;
- dyld_shared_cache_ranges.ranges[index].length = p->size;
+ for (const shared_file_mapping_np* p = start; p < end; ++p, ++index ) {
+ dyld_shared_cache_ranges.ranges[index].start = p->sfm_address;
+ dyld_shared_cache_ranges.ranges[index].length = p->sfm_size;
if ( gLinkContext.verboseMapping ) {
- dyld::log(" 0x%08llX->0x%08llX %s%s%s init=%x, max=%x\n",
- p->address+sSharedCacheSlide, p->address+sSharedCacheSlide+p->size-1,
- ((p->initProt & VM_PROT_READ) ? "read " : ""),
- ((p->initProt & VM_PROT_WRITE) ? "write " : ""),
- ((p->initProt & VM_PROT_EXECUTE) ? "execute " : ""), p->initProt, p->maxProt);
+ dyld::log(" 0x%08llX->0x%08llX %s%s%s init=%x, max=%x\n", p->sfm_address, p->sfm_address+p->sfm_size-1,
+ ((p->sfm_init_prot & VM_PROT_READ) ? "read " : ""),
+ ((p->sfm_init_prot & VM_PROT_WRITE) ? "write " : ""),
+ ((p->sfm_init_prot & VM_PROT_EXECUTE) ? "execute " : ""), p->sfm_init_prot, p->sfm_max_prot);
}
#if __i386__
- // If a non-writable and executable region is found in the R/W shared region, then this is __IMPORT segments
- // This is an old cache. Make writable. dyld no longer supports turn W on and off as it binds
- if ( (p->initProt == (VM_PROT_READ|VM_PROT_EXECUTE)) && ((p->address & 0xF0000000) == 0xA0000000) ) {
- if ( p->size != 0 ) {
- vm_prot_t prot = VM_PROT_EXECUTE | PROT_READ | VM_PROT_WRITE;
- vm_protect(mach_task_self(), p->address, p->size, false, prot);
- if ( gLinkContext.verboseMapping ) {
- dyld::log("%18s at 0x%08llX->0x%08llX altered permissions to %c%c%c\n", "", p->address,
- p->address+p->size-1,
- (prot & PROT_READ) ? 'r' : '.', (prot & PROT_WRITE) ? 'w' : '.', (prot & PROT_EXEC) ? 'x' : '.' );
- }
- }
+ // record if a non-writable and executable region is found in the R/W shared region
+ // this is the __IMPORT segments. dyld will turn write protection on and off as needed
+ if ( (p->sfm_init_prot == (VM_PROT_READ|VM_PROT_EXECUTE)) && ((p->sfm_address & 0xF0000000) == 0xA0000000) ) {
+ sImportSegmentsStart = p->sfm_address;
+ sImportSegmentsSize = p->sfm_size;
+ makeSharedCacheImportSegmentsWritable(true);
}
#endif
}
- if ( gLinkContext.verboseMapping ) {
- // list the code blob
- dyld_cache_header* header = (dyld_cache_header*)sSharedCache;
- uint64_t signatureSize = header->codeSignatureSize;
- // zero size in header means signature runs to end-of-file
- if ( signatureSize == 0 ) {
- struct stat stat_buf;
- // FIXME: need size of cache file actually used
- if ( my_stat(IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME, &stat_buf) == 0 )
- signatureSize = stat_buf.st_size - header->codeSignatureOffset;
- }
- if ( signatureSize != 0 ) {
- const dyld_cache_mapping_info* const last = &start[dyld_shared_cache_ranges.sharedRegionsCount-1];
- uint64_t codeBlobStart = last->address + last->size;
- dyld::log(" 0x%08llX->0x%08llX (code signature)\n", codeBlobStart, codeBlobStart+signatureSize);
- }
- }
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
- // check for file that enables dyld shared cache dylibs to be overridden
- struct stat enableStatBuf;
- // check file size to determine if correct file is in place.
- // See <rdar://problem/13591370> Need a way to disable roots without removing /S/L/C/com.apple.dyld/enable...
- sDylibsOverrideCache = ( (my_stat(IPHONE_DYLD_SHARED_CACHE_DIR "enable-dylibs-to-override-cache", &enableStatBuf) == 0)
- && (enableStatBuf.st_size < ENABLE_DYLIBS_TO_OVERRIDE_CACHE_SIZE) );
-#endif
+
}
}
#endif // #if DYLD_SHARED_CACHE_SUPPORT
@@ -3654,6 +2198,8 @@
// create when NSLinkModule is called for a second time on a bundle
ImageLoader* cloneImage(ImageLoader* image)
{
+ const uint64_t offsetInFat = image->getOffsetInFatFile();
+
// open file (automagically closed when this function exits)
FileOpener file(image->getPath());
@@ -3661,19 +2207,24 @@
if ( fstat(file.getFileDescriptor(), &stat_buf) == -1)
throw "stat error";
- dyld::LoadContext context;
- context.useSearchPaths = false;
- context.useFallbackPaths = false;
- context.useLdLibraryPath = false;
- context.implicitRPath = false;
- context.matchByInstallName = false;
- context.dontLoad = false;
- context.mustBeBundle = true;
- context.mustBeDylib = false;
- context.canBePIE = false;
- context.origin = NULL;
- context.rpath = NULL;
- return loadPhase6(file.getFileDescriptor(), stat_buf, image->getPath(), context);
+ // read first page of file
+ uint8_t firstPage[4096];
+ pread(file.getFileDescriptor(), firstPage, 4096, offsetInFat);
+
+ // fat length is only used for sanity checking, since this image was already loaded once, just use upper bound
+ uint64_t lenInFat = stat_buf.st_size - offsetInFat;
+
+ // try mach-o loader
+ if ( isCompatibleMachO(firstPage) ) {
+ ImageLoader* clone = new ImageLoaderMachO(image->getPath(), file.getFileDescriptor(), firstPage, offsetInFat, lenInFat, stat_buf, gLinkContext);
+ // don't add bundles to global list, they can be loaded but not linked. When linked it will be added to list
+ if ( ! image->isBundle() )
+ addImage(clone);
+ return clone;
+ }
+
+ // try other file formats...
+ throw "can't clone image";
}
@@ -3694,8 +2245,8 @@
}
// try each loader
- if ( isCompatibleMachO(mem, moduleName) ) {
- ImageLoader* image = ImageLoaderMachO::instantiateFromMemory(moduleName, (macho_header*)mem, len, gLinkContext);
+ if ( isCompatibleMachO(mem) ) {
+ ImageLoader* image = new ImageLoaderMachO(moduleName, (mach_header*)mem, len, gLinkContext);
// don't add bundles to global list, they can be loaded but not linked. When linked it will be added to list
if ( ! image->isBundle() )
addImage(image);
@@ -3733,9 +2284,6 @@
void registerRemoveCallback(ImageCallback func)
{
- // <rdar://problem/15025198> ignore calls to register a notification during a notification
- if ( sRemoveImageCallbacksInUse )
- return;
sRemoveImageCallbacks.push_back(func);
}
@@ -3747,7 +2295,8 @@
void setErrorMessage(const char* message)
{
// save off error message in global buffer for CrashReporter to find
- strlcpy(error_string, message, sizeof(error_string));
+ strncpy(error_string, message, sizeof(error_string)-1);
+ error_string[sizeof(error_string)-1] = '\0';
}
const char* getErrorMessage()
@@ -3756,24 +2305,13 @@
}
-void halt(const char* message)
+void halt(const char* message)
{
dyld::log("dyld: %s\n", message);
setErrorMessage(message);
- uintptr_t terminationFlags = 0;
- if ( !gLinkContext.startedInitializingMainExecutable )
- terminationFlags = 1;
- setAlImageInfosHalt(error_string, terminationFlags);
+ strncpy(error_string, message, sizeof(error_string)-1);
+ error_string[sizeof(error_string)-1] = '\0';
dyld_fatal_error(error_string);
-}
-
-static void setErrorStrings(unsigned errorCode, const char* errorClientOfDylibPath,
- const char* errorTargetDylibPath, const char* errorSymbol)
-{
- dyld::gProcessInfo->errorKind = errorCode;
- dyld::gProcessInfo->errorClientOfDylibPath = errorClientOfDylibPath;
- dyld::gProcessInfo->errorTargetDylibPath = errorTargetDylibPath;
- dyld::gProcessInfo->errorSymbol = errorSymbol;
}
@@ -3791,7 +2329,7 @@
#if __i386__
// fast stubs pass NULL for mh and image is instead found via the location of stub (aka lazyPointer)
if ( mh == NULL )
- target = dyld::findImageContainingAddress(lazyPointer);
+ target = dyld::findImageContainingAddressThreadSafe(lazyPointer);
else
target = dyld::findImageByMachHeader(mh);
#else
@@ -3816,36 +2354,12 @@
}
-uintptr_t fastBindLazySymbol(ImageLoader** imageLoaderCache, uintptr_t lazyBindingInfoOffset)
-{
- uintptr_t result = 0;
- // get image
- if ( *imageLoaderCache == NULL ) {
- // save in cache
- *imageLoaderCache = dyld::findMappedRange((uintptr_t)imageLoaderCache);
- if ( *imageLoaderCache == NULL ) {
- const char* message = "fast lazy binding from unknown image";
- dyld::log("dyld: %s\n", message);
- halt(message);
- }
- }
-
- // bind lazy pointer and return it
- try {
- result = (*imageLoaderCache)->doBindFastLazySymbol((uint32_t)lazyBindingInfoOffset, gLinkContext,
- (dyld::gLibSystemHelpers != NULL) ? dyld::gLibSystemHelpers->acquireGlobalDyldLock : NULL,
- (dyld::gLibSystemHelpers != NULL) ? dyld::gLibSystemHelpers->releaseGlobalDyldLock : NULL);
- }
- catch (const char* message) {
- dyld::log("dyld: lazy symbol binding failed: %s\n", message);
- halt(message);
- }
-
- // return target address to glue which jumps to it with real parameters restored
- return result;
-}
-
-
+// SPI used by ZeroLink to lazy load bundles
+void registerZeroLinkHandlers(BundleNotificationCallBack notify, BundleLocatorCallBack locate)
+{
+ sBundleNotifier = notify;
+ sBundleLocation = locate;
+}
void registerUndefinedHandler(UndefinedHandler handler)
{
@@ -3861,11 +2375,53 @@
static bool findExportedSymbol(const char* name, bool onlyInCoalesced, const ImageLoader::Symbol** sym, const ImageLoader** image)
{
+ // try ZeroLink short cut to finding bundle which exports this symbol
+ if ( sBundleLocation != NULL ) {
+ ImageLoader* zlImage = (*sBundleLocation)(name);
+ if ( zlImage == ((ImageLoader*)(-1)) ) {
+ // -1 is magic value that request symbol is in a bundle not yet linked into process
+ // try calling handler to link in that symbol
+ undefinedHandler(name);
+ // call locator again
+ zlImage = (*sBundleLocation)(name);
+ }
+ // if still not found, then ZeroLink has no idea where to find it
+ if ( zlImage == ((ImageLoader*)(-1)) )
+ return false;
+ if ( zlImage != NULL ) {
+ // ZeroLink cache knows where the symbol is
+ if ( onlyInCoalesced ) {
+ // but ZeroLink does not know about coalescing weak symbols, so ignore ZeroLink's hint when onlyInCoalesced==true
+ }
+ else {
+ *sym = zlImage->findExportedSymbol(name, NULL, false, image);
+ if ( *sym != NULL ) {
+ *image = zlImage;
+ return true;
+ }
+ }
+ }
+ else {
+ // ZeroLink says it is in some bundle already loaded, but not linked, walk them all
+ const unsigned int imageCount = sAllImages.size();
+ for(unsigned int i=0; i < imageCount; ++i){
+ ImageLoader* anImage = sAllImages[i];
+ if ( anImage->isBundle() && !anImage->hasHiddenExports() ) {
+ //dyld::log("dyld: search for %s in %s\n", name, anImage->getPath());
+ *sym = anImage->findExportedSymbol(name, NULL, false, image);
+ if ( *sym != NULL ) {
+ return true;
+ }
+ }
+ }
+ }
+ }
+
// search all images in order
const ImageLoader* firstWeakImage = NULL;
const ImageLoader::Symbol* firstWeakSym = NULL;
- const size_t imageCount = sAllImages.size();
- for(size_t i=0; i < imageCount; ++i) {
+ const unsigned int imageCount = sAllImages.size();
+ for(unsigned int i=0; i < imageCount; ++i) {
ImageLoader* anImage = sAllImages[i];
// the use of inserted libraries alters search order
// so that inserted libraries are found before the main executable
@@ -3876,7 +2432,7 @@
anImage = sAllImages[0];
}
if ( ! anImage->hasHiddenExports() && (!onlyInCoalesced || anImage->hasCoalescedExports()) ) {
- *sym = anImage->findExportedSymbol(name, false, image);
+ *sym = anImage->findExportedSymbol(name, NULL, false, image);
if ( *sym != NULL ) {
// if weak definition found, record first one found
if ( ((*image)->getExportedSymbolInfo(*sym) & ImageLoader::kWeakDefinition) != 0 ) {
@@ -3916,12 +2472,12 @@
bool flatFindExportedSymbolWithHint(const char* name, const char* librarySubstring, const ImageLoader::Symbol** sym, const ImageLoader** image)
{
// search all images in order
- const size_t imageCount = sAllImages.size();
- for(size_t i=0; i < imageCount; ++i){
+ const unsigned int imageCount = sAllImages.size();
+ for(unsigned int i=0; i < imageCount; ++i){
ImageLoader* anImage = sAllImages[i];
// only look at images whose paths contain the hint string (NULL hint string is wildcard)
if ( ! anImage->isBundle() && ((librarySubstring==NULL) || (strstr(anImage->getPath(), librarySubstring) != NULL)) ) {
- *sym = anImage->findExportedSymbol(name, false, image);
+ *sym = anImage->findExportedSymbol(name, NULL, false, image);
if ( *sym != NULL ) {
return true;
}
@@ -3929,20 +2485,6 @@
}
return false;
}
-
-unsigned int getCoalescedImages(ImageLoader* images[])
-{
- unsigned int count = 0;
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* image = *it;
- if ( image->participatesInCoalescing() ) {
- *images++ = *it;
- ++count;
- }
- }
- return count;
-}
-
static ImageLoader::MappedRegion* getMappedRegions(ImageLoader::MappedRegion* regions)
{
@@ -3963,19 +2505,14 @@
// add to list of handlers
std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(state, sSingleHandlers);
if ( handlers != NULL ) {
- // <rdar://problem/10332417> need updateAllImages() to be last in dyld_image_state_mapped list
- // so that if ObjC adds a handler that prevents a load, it happens before the gdb list is updated
- if ( state == dyld_image_state_mapped )
- handlers->insert(handlers->begin(), handler);
- else
- handlers->push_back(handler);
+ handlers->push_back(handler);
// call callback with all existing images
for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
ImageLoader* image = *it;
dyld_image_info info;
info.imageLoadAddress = image->machHeader();
- info.imageFilePath = image->getRealPath();
+ info.imageFilePath = image->getPath();
info.imageFileModDate = image->lastModified();
// should only call handler if state == image->state
if ( image->getState() == state )
@@ -4008,18 +2545,17 @@
}
}
-static ImageLoader* libraryLocator(const char* libraryName, bool search, const char* origin, const ImageLoader::RPathChain* rpaths)
+static ImageLoader* libraryLocator(const char* libraryName, bool search, bool findDLL, const char* origin, const ImageLoader::RPathChain* rpaths)
{
dyld::LoadContext context;
context.useSearchPaths = search;
- context.useFallbackPaths = search;
context.useLdLibraryPath = false;
context.implicitRPath = false;
context.matchByInstallName = false;
context.dontLoad = false;
context.mustBeBundle = false;
context.mustBeDylib = true;
- context.canBePIE = false;
+ context.findDLL = findDLL;
context.origin = origin;
context.rpath = rpaths;
return load(libraryName, context);
@@ -4035,14 +2571,17 @@
return last;
}
-static void setContext(const macho_header* mainExecutableMH, int argc, const char* argv[], const char* envp[], const char* apple[])
+static void setContext(const struct mach_header* mainExecutableMH, int argc, const char* argv[], const char* envp[], const char* apple[])
{
gLinkContext.loadLibrary = &libraryLocator;
gLinkContext.terminationRecorder = &terminationRecorder;
gLinkContext.flatExportFinder = &flatFindExportedSymbol;
gLinkContext.coalescedExportFinder = &findCoalescedExportedSymbol;
- gLinkContext.getCoalescedImages = &getCoalescedImages;
gLinkContext.undefinedHandler = &undefinedHandler;
+#if IMAGE_NOTIFY_SUPPORT
+ gLinkContext.addImageNeedingNotification = &addImageNeedingNotification;
+ gLinkContext.notifyAdding = ¬ifyAdding;
+#endif
gLinkContext.getAllMappedRegions = &getMappedRegions;
gLinkContext.bindingHandler = NULL;
gLinkContext.notifySingle = ¬ifySingle;
@@ -4050,18 +2589,15 @@
gLinkContext.removeImage = &removeImage;
gLinkContext.registerDOFs = ®isterDOFs;
gLinkContext.clearAllDepths = &clearAllDepths;
- gLinkContext.printAllDepths = &printAllDepths;
gLinkContext.imageCount = &imageCount;
+ gLinkContext.notifySharedCacheInvalid= ¬ifySharedCacheInvalid;
+#if __i386__
+ gLinkContext.makeSharedCacheImportSegmentsWritable = &makeSharedCacheImportSegmentsWritable;
+#endif
gLinkContext.setNewProgramVars = &setNewProgramVars;
-#if DYLD_SHARED_CACHE_SUPPORT
- gLinkContext.inSharedCache = &inSharedCache;
-#endif
- gLinkContext.setErrorStrings = &setErrorStrings;
#if SUPPORT_OLD_CRT_INITIALIZATION
gLinkContext.setRunInitialzersOldWay= &setRunInitialzersOldWay;
#endif
- gLinkContext.findImageContainingAddress = &findImageContainingAddress;
- gLinkContext.addDynamicReference = &addDynamicReference;
gLinkContext.bindingOptions = ImageLoader::kBindingNone;
gLinkContext.argc = argc;
gLinkContext.argv = argv;
@@ -4075,138 +2611,24 @@
gLinkContext.programVars.__prognamePtr=&gLinkContext.progname;
gLinkContext.mainExecutable = NULL;
gLinkContext.imageSuffix = NULL;
- gLinkContext.dynamicInterposeArray = NULL;
- gLinkContext.dynamicInterposeCount = 0;
gLinkContext.prebindUsage = ImageLoader::kUseAllPrebinding;
-#if TARGET_IPHONE_SIMULATOR
- gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
-#else
gLinkContext.sharedRegionMode = ImageLoader::kUseSharedRegion;
-#endif
-}
-
-
-
-//
-// Look for a special segment in the mach header.
-// Its presences means that the binary wants to have DYLD ignore
-// DYLD_ environment variables.
-//
-static bool hasRestrictedSegment(const macho_header* mh)
-{
- const uint32_t cmd_count = mh->ncmds;
- const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- switch (cmd->cmd) {
- case LC_SEGMENT_COMMAND:
- {
- const struct macho_segment_command* seg = (struct macho_segment_command*)cmd;
-
- //dyld::log("seg name: %s\n", seg->segname);
- if (strcmp(seg->segname, "__RESTRICT") == 0) {
- const struct macho_section* const sectionsStart = (struct macho_section*)((char*)seg + sizeof(struct macho_segment_command));
- const struct macho_section* const sectionsEnd = §ionsStart[seg->nsects];
- for (const struct macho_section* sect=sectionsStart; sect < sectionsEnd; ++sect) {
- if (strcmp(sect->sectname, "__restrict") == 0)
- return true;
- }
- }
- }
- break;
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- }
-
+}
+
+#if __ppc__ || __i386__
+bool isRosetta()
+{
+ int mib[] = { CTL_KERN, KERN_CLASSIC, getpid() };
+ int is_classic = 0;
+ size_t len = sizeof(int);
+ int ret = sysctl(mib, 3, &is_classic, &len, NULL, 0);
+ if ((ret != -1) && is_classic) {
+ // we're running under Rosetta
+ return true;
+ }
return false;
}
-
-
-#if SUPPORT_VERSIONED_PATHS
-
-static bool readFirstPage(const char* dylibPath, uint8_t firstPage[4096])
-{
- firstPage[0] = 0;
- // open file (automagically closed when this function exits)
- FileOpener file(dylibPath);
-
- if ( file.getFileDescriptor() == -1 )
- return false;
-
- if ( pread(file.getFileDescriptor(), firstPage, 4096, 0) != 4096 )
- return false;
-
- // if fat wrapper, find usable sub-file
- const fat_header* fileStartAsFat = (fat_header*)firstPage;
- if ( fileStartAsFat->magic == OSSwapBigToHostInt32(FAT_MAGIC) ) {
- uint64_t fileOffset;
- uint64_t fileLength;
- if ( fatFindBest(fileStartAsFat, &fileOffset, &fileLength) ) {
- if ( pread(file.getFileDescriptor(), firstPage, 4096, fileOffset) != 4096 )
- return false;
- }
- else {
- return false;
- }
- }
-
- return true;
-}
-
-//
-// Peeks at a dylib file and returns its current_version and install_name.
-// Returns false on error.
-//
-static bool getDylibVersionAndInstallname(const char* dylibPath, uint32_t* version, char* installName)
-{
- uint8_t firstPage[4096];
- const macho_header* mh = (macho_header*)firstPage;
- if ( !readFirstPage(dylibPath, firstPage) ) {
- #if DYLD_SHARED_CACHE_SUPPORT
- // If file cannot be read, check to see if path is in shared cache
- const macho_header* mhInCache;
- const char* pathInCache;
- long slideInCache;
- if ( !findInSharedCacheImage(dylibPath, true, NULL, &mhInCache, &pathInCache, &slideInCache) )
- return false;
- mh = mhInCache;
- #else
- return false;
- #endif
- }
-
- // check mach-o header
- if ( mh->magic != sMainExecutableMachHeader->magic )
- return false;
- if ( mh->cputype != sMainExecutableMachHeader->cputype )
- return false;
-
- // scan load commands for LC_ID_DYLIB
- const uint32_t cmd_count = mh->ncmds;
- const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
- const struct load_command* const cmdsReadEnd = (struct load_command*)(((char*)mh)+4096);
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- switch (cmd->cmd) {
- case LC_ID_DYLIB:
- {
- const struct dylib_command* id = (struct dylib_command*)cmd;
- *version = id->dylib.current_version;
- if ( installName != NULL )
- strlcpy(installName, (char *)id + id->dylib.name.offset, PATH_MAX);
- return true;
- }
- break;
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- if ( cmd > cmdsReadEnd )
- return false;
- }
-
- return false;
-}
-#endif // SUPPORT_VERSIONED_PATHS
-
+#endif
#if 0
static void printAllImages()
@@ -4215,13 +2637,14 @@
for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
ImageLoader* image = *it;
dyld_image_states imageState = image->getState();
- dyld::log(" state=%d, dlopen-count=%d, never-unload=%d, in-use=%d, name=%s\n",
- imageState, image->dlopenCount(), image->neverUnload(), image->isMarkedInUse(), image->getShortName());
- }
-}
-#endif
-
-void link(ImageLoader* image, bool forceLazysBound, bool neverUnload, const ImageLoader::RPathChain& loaderRPaths)
+ dyld::log(" state=%d, refcount=%d, name=%s\n", imageState, image->referenceCount(), image->getShortName());
+ image->printReferenceCounts();
+ }
+}
+#endif
+
+
+void link(ImageLoader* image, bool forceLazysBound, const ImageLoader::RPathChain& loaderRPaths)
{
// add to list of known images. This did not happen at creation time for bundles
if ( image->isBundle() && !image->isLinked() )
@@ -4231,136 +2654,61 @@
if ( !image->isLinked() )
addRootImage(image);
+ // notify ZeroLink of new image with concat of logical and physical name
+ if ( sBundleNotifier != NULL && image->isBundle() ) {
+ const int logicalLen = strlen(image->getLogicalPath());
+ char logAndPhys[strlen(image->getPath())+logicalLen+2];
+ strcpy(logAndPhys, image->getLogicalPath());
+ strcpy(&logAndPhys[logicalLen+1], image->getPath());
+ (*sBundleNotifier)(logAndPhys, image);
+ }
+
// process images
try {
- image->link(gLinkContext, forceLazysBound, false, neverUnload, loaderRPaths);
+ image->link(gLinkContext, forceLazysBound, false, loaderRPaths);
}
catch (const char* msg) {
garbageCollectImages();
throw;
}
+
+#if OLD_GDB_DYLD_INTERFACE
+ // notify gdb that loaded libraries have changed
+ gdb_dyld_state_changed();
+#endif
}
void runInitializers(ImageLoader* image)
{
// do bottom up initialization
- ImageLoader::InitializerTimingList initializerTimes[sAllImages.size()];
- initializerTimes[0].count = 0;
- image->runInitializers(gLinkContext, initializerTimes[0]);
-}
-
-// This function is called at the end of dlclose() when the reference count goes to zero.
-// The dylib being unloaded may have brought in other dependent dylibs when it was loaded.
-// Those dependent dylibs need to be unloaded, but only if they are not referenced by
-// something else. We use a standard mark and sweep garbage collection.
-//
-// The tricky part is that when a dylib is unloaded it may have a termination function that
-// can run and itself call dlclose() on yet another dylib. The problem is that this
-// sort of gabage collection is not re-entrant. Instead a terminator's call to dlclose()
-// which calls garbageCollectImages() will just set a flag to re-do the garbage collection
-// when the current pass is done.
-//
-// Also note that this is done within the dyld global lock, so it is always single threaded.
-//
+ image->runInitializers(gLinkContext);
+}
+
void garbageCollectImages()
{
- static bool sDoingGC = false;
- static bool sRedo = false;
-
- if ( sDoingGC ) {
- // GC is currently being run, just set a flag to have it run again.
- sRedo = true;
- return;
- }
-
- sDoingGC = true;
- do {
- sRedo = false;
-
- // mark phase: mark all images not-in-use
+ // keep scanning list of images until entire list is scanned with no unreferenced images
+ bool mightBeUnreferencedImages = true;
+ while ( mightBeUnreferencedImages ) {
+ mightBeUnreferencedImages = false;
for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
ImageLoader* image = *it;
- //dyld::log("gc: neverUnload=%d name=%s\n", image->neverUnload(), image->getShortName());
- image->markNotUsed();
- }
-
- // sweep phase: mark as in-use, images reachable from never-unload or in-use image
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* image = *it;
- if ( (image->dlopenCount() != 0) || image->neverUnload() ) {
- OSSpinLockLock(&sDynamicReferencesLock);
- image->markedUsedRecursive(sDynamicReferences);
- OSSpinLockUnlock(&sDynamicReferencesLock);
- }
- }
-
- // collect phase: build array of images not marked in-use
- ImageLoader* deadImages[sAllImages.size()];
- unsigned deadCount = 0;
- int maxRangeCount = 0;
- unsigned i = 0;
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* image = *it;
- if ( ! image->isMarkedInUse() ) {
- deadImages[i++] = image;
- if (gLogAPIs) dyld::log("dlclose(), found unused image %p %s\n", image, image->getShortName());
- ++deadCount;
- maxRangeCount += image->segmentCount();
- }
- }
-
- // collect phase: run termination routines for images not marked in-use
- __cxa_range_t ranges[maxRangeCount];
- int rangeCount = 0;
- for (unsigned i=0; i < deadCount; ++i) {
- ImageLoader* image = deadImages[i];
- for (unsigned int j=0; j < image->segmentCount(); ++j) {
- if ( !image->segExecutable(j) )
- continue;
- if ( rangeCount < maxRangeCount ) {
- ranges[rangeCount].addr = (const void*)image->segActualLoadAddress(j);
- ranges[rangeCount].length = image->segSize(j);
- ++rangeCount;
+ if ( (image->referenceCount() == 0) && !image->neverUnload() && !image->isBeingRemoved() ) {
+ try {
+ //dyld::log("garbageCollectImages: deleting %s\n", image->getPath());
+ image->setBeingRemoved();
+ removeImage(image);
+ delete image;
}
- }
- try {
- runImageStaticTerminators(image);
- }
- catch (const char* msg) {
- dyld::warn("problem running terminators for image: %s\n", msg);
- }
- }
-
- // <rdar://problem/14718598> dyld should call __cxa_finalize_ranges()
- if ( (rangeCount > 0) && (gLibSystemHelpers != NULL) && (gLibSystemHelpers->version >= 13) )
- (*gLibSystemHelpers->cxa_finalize_ranges)(ranges, rangeCount);
-
- // collect phase: delete all images which are not marked in-use
- bool mightBeMore;
- do {
- mightBeMore = false;
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* image = *it;
- if ( ! image->isMarkedInUse() ) {
- try {
- if (gLogAPIs) dyld::log("dlclose(), deleting %p %s\n", image, image->getShortName());
- removeImage(image);
- ImageLoader::deleteImage(image);
- mightBeMore = true;
- break; // interator in invalidated by this removal
- }
- catch (const char* msg) {
- dyld::warn("problem deleting image: %s\n", msg);
- }
+ catch (const char* msg) {
+ dyld::warn("problem deleting image: %s\n", msg);
}
- }
- } while ( mightBeMore );
- } while (sRedo);
- sDoingGC = false;
-
+ mightBeUnreferencedImages = true;
+ break;
+ }
+ }
+ }
//printAllImages();
-
}
@@ -4368,7 +2716,7 @@
{
if ( image->isBundle() ) {
removeImageFromAllImages(image->machHeader());
- ImageLoader::deleteImage(image);
+ delete image;
}
sBundleBeingLoaded = NULL;
dyld::garbageCollectImages();
@@ -4380,7 +2728,7 @@
try {
if ( image->isBundle() )
sBundleBeingLoaded = image; // hack
- image->link(gLinkContext, false, true, false, loaderRPaths);
+ image->link(gLinkContext, false, true, loaderRPaths);
}
catch (const char* msg) {
preflight_finally(image);
@@ -4395,341 +2743,22 @@
try {
LoadContext context;
context.useSearchPaths = false;
- context.useFallbackPaths = false;
context.useLdLibraryPath = false;
context.implicitRPath = false;
context.matchByInstallName = false;
context.dontLoad = false;
context.mustBeBundle = false;
context.mustBeDylib = true;
- context.canBePIE = false;
+ context.findDLL = false;
context.origin = NULL; // can't use @loader_path with DYLD_INSERT_LIBRARIES
context.rpath = NULL;
image = load(path, context);
- }
- catch (const char* msg) {
-#if TARGET_IPHONE_SIMULATOR
- dyld::log("dyld: warning: could not load inserted library '%s' because %s\n", path, msg);
-#else
- halt(dyld::mkstringf("could not load inserted library '%s' because %s\n", path, msg));
-#endif
+ image->setNeverUnload();
}
catch (...) {
- halt(dyld::mkstringf("could not load inserted library '%s'\n", path));
- }
-}
-
-static bool processRestricted(const macho_header* mainExecutableMH, bool* ignoreEnvVars, bool* processRequiresLibraryValidation)
-{
-#if TARGET_IPHONE_SIMULATOR
- gLinkContext.codeSigningEnforced = true;
-#else
- // ask kernel if code signature of program makes it restricted
- uint32_t flags;
- if ( csops(0, CS_OPS_STATUS, &flags, sizeof(flags)) != -1 ) {
- if (flags & CS_REQUIRE_LV)
- *processRequiresLibraryValidation = true;
-
- #if __MAC_OS_X_VERSION_MIN_REQUIRED
- if ( flags & CS_ENFORCEMENT ) {
- gLinkContext.codeSigningEnforced = true;
- }
- if ( ((flags & CS_RESTRICT) == CS_RESTRICT) && (csr_check(CSR_ALLOW_TASK_FOR_PID) != 0) ) {
- sRestrictedReason = restrictedByEntitlements;
- return true;
- }
- #else
- if ((flags & CS_ENFORCEMENT) && !(flags & CS_GET_TASK_ALLOW)) {
- *ignoreEnvVars = true;
- }
- gLinkContext.codeSigningEnforced = true;
- #endif
- }
-#endif
-
- // all processes with setuid or setgid bit set are restricted
- if ( issetugid() ) {
- sRestrictedReason = restrictedBySetGUid;
- return true;
- }
-
- // <rdar://problem/13158444&13245742> Respect __RESTRICT,__restrict section for root processes
- if ( hasRestrictedSegment(mainExecutableMH) ) {
- // existence of __RESTRICT/__restrict section make process restricted
- sRestrictedReason = restrictedBySegment;
- return true;
- }
- return false;
-}
-
-
-bool processIsRestricted()
-{
- return sProcessIsRestricted;
-}
-
-
-// <rdar://problem/10583252> Add dyld to uuidArray to enable symbolication of stackshots
-static void addDyldImageToUUIDList()
-{
- const struct macho_header* mh = (macho_header*)&__dso_handle;
- const uint32_t cmd_count = mh->ncmds;
- const struct load_command* const cmds = (struct load_command*)((char*)mh + sizeof(macho_header));
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- switch (cmd->cmd) {
- case LC_UUID: {
- uuid_command* uc = (uuid_command*)cmd;
- dyld_uuid_info info;
- info.imageLoadAddress = (mach_header*)mh;
- memcpy(info.imageUUID, uc->uuid, 16);
- addNonSharedCacheImageUUID(info);
- return;
- }
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- }
-}
-
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
-typedef int (*open_proc_t)(const char*, int, int);
-typedef int (*fcntl_proc_t)(int, int, void*);
-typedef int (*ioctl_proc_t)(int, unsigned long, void*);
-static void* getProcessInfo() { return dyld::gProcessInfo; }
-static SyscallHelpers sSysCalls = {
- 4,
- // added in version 1
- (open_proc_t)&open,
- &close,
- &pread,
- &write,
- &mmap,
- &munmap,
- &madvise,
- &stat,
- (fcntl_proc_t)&fcntl,
- (ioctl_proc_t)&ioctl,
- &issetugid,
- &getcwd,
- &realpath,
- &vm_allocate,
- &vm_deallocate,
- &vm_protect,
- &vlog,
- &vwarn,
- &pthread_mutex_lock,
- &pthread_mutex_unlock,
- &mach_thread_self,
- &mach_port_deallocate,
- &task_self_trap,
- &mach_timebase_info,
- &OSAtomicCompareAndSwapPtrBarrier,
- &OSMemoryBarrier,
- &getProcessInfo,
- &__error,
- &mach_absolute_time,
- // added in version 2
- &thread_switch,
- // added in version 3
- &opendir,
- &readdir_r,
- &closedir,
- // added in version 4
- &coresymbolication_load_notifier,
- &coresymbolication_unload_notifier
-};
-
-__attribute__((noinline))
-static uintptr_t useSimulatorDyld(int fd, const macho_header* mainExecutableMH, const char* dyldPath,
- int argc, const char* argv[], const char* envp[], const char* apple[], uintptr_t* startGlue)
-{
- *startGlue = 0;
-
- // verify simulator dyld file is owned by root
- struct stat sb;
- if ( fstat(fd, &sb) == -1 )
- return 0;
-
- // read first page of dyld file
- uint8_t firstPage[4096];
- if ( pread(fd, firstPage, 4096, 0) != 4096 )
- return 0;
-
- // if fat file, pick matching slice
- uint64_t fileOffset = 0;
- uint64_t fileLength = sb.st_size;
- const fat_header* fileStartAsFat = (fat_header*)firstPage;
- if ( fileStartAsFat->magic == OSSwapBigToHostInt32(FAT_MAGIC) ) {
- if ( !fatFindBest(fileStartAsFat, &fileOffset, &fileLength) )
- return 0;
- // re-read buffer from start of mach-o slice in fat file
- if ( pread(fd, firstPage, 4096, fileOffset) != 4096 )
- return 0;
- }
- else if ( !isCompatibleMachO(firstPage, dyldPath) ) {
- return 0;
- }
-
- // calculate total size of dyld segments
- const macho_header* mh = (const macho_header*)firstPage;
- struct macho_segment_command* lastSeg = NULL;
- struct macho_segment_command* firstSeg = NULL;
- uintptr_t mappingSize = 0;
- uintptr_t preferredLoadAddress = 0;
- const uint32_t cmd_count = mh->ncmds;
- if ( (sizeof(macho_header) + mh->sizeofcmds) > 4096 )
- return 0;
- const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
- const struct load_command* const endCmds = (struct load_command*)(((char*)mh) + sizeof(macho_header) + mh->sizeofcmds);
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- uint32_t cmdLength = cmd->cmdsize;
- if ( cmdLength < 8 )
- return 0;
- const struct load_command* const nextCmd = (const struct load_command*)(((char*)cmd)+cmdLength);
- if ( (nextCmd > endCmds) || (nextCmd < cmd) )
- return 0;
- switch (cmd->cmd) {
- case LC_SEGMENT_COMMAND:
- {
- struct macho_segment_command* seg = (struct macho_segment_command*)cmd;
- if ( seg->vmaddr + seg->vmsize < seg->vmaddr )
- return 0;
- if ( seg->vmsize < seg->filesize )
- return 0;
- if ( lastSeg == NULL ) {
- // first segment must be __TEXT and start at beginning of file/slice
- firstSeg = seg;
- if ( strcmp(seg->segname, "__TEXT") != 0 )
- return 0;
- if ( seg->fileoff != 0 )
- return 0;
- if ( seg->filesize < (sizeof(macho_header) + mh->sizeofcmds) )
- return 0;
- preferredLoadAddress = seg->vmaddr;
- }
- else {
- // other sements must be continguous with previous segment and not executable
- if ( lastSeg->fileoff + lastSeg->filesize != seg->fileoff )
- return 0;
- if ( lastSeg->vmaddr + lastSeg->vmsize != seg->vmaddr )
- return 0;
- if ( (seg->initprot & VM_PROT_EXECUTE) != 0 )
- return 0;
- }
- mappingSize += seg->vmsize;
- lastSeg = seg;
- }
- break;
- case LC_SEGMENT_COMMAND_WRONG:
- return 0;
- }
- cmd = nextCmd;
- }
- // last segment must be named __LINKEDIT and not writable
- if ( strcmp(lastSeg->segname, "__LINKEDIT") != 0 )
- return 0;
- if ( lastSeg->initprot & VM_PROT_WRITE )
- return 0;
-
- // reserve space, then mmap each segment
- vm_address_t loadAddress = 0;
- if ( ::vm_allocate(mach_task_self(), &loadAddress, mappingSize, VM_FLAGS_ANYWHERE) != 0 )
- return 0;
- cmd = cmds;
- struct linkedit_data_command* codeSigCmd = NULL;
- struct source_version_command* dyldVersionCmd = NULL;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- switch (cmd->cmd) {
- case LC_SEGMENT_COMMAND:
- {
- struct macho_segment_command* seg = (struct macho_segment_command*)cmd;
- uintptr_t requestedLoadAddress = seg->vmaddr - preferredLoadAddress + loadAddress;
- void* segAddress = ::mmap((void*)requestedLoadAddress, seg->filesize, seg->initprot, MAP_FIXED | MAP_PRIVATE, fd, fileOffset + seg->fileoff);
- //dyld::log("dyld_sim %s mapped at %p\n", seg->segname, segAddress);
- if ( segAddress == (void*)(-1) )
- return 0;
- }
- break;
- case LC_CODE_SIGNATURE:
- codeSigCmd = (struct linkedit_data_command*)cmd;
- break;
- case LC_SOURCE_VERSION:
- dyldVersionCmd = (struct source_version_command*)cmd;
- break;
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- }
-
- // must have code signature which is contained within LINKEDIT segment
- if ( codeSigCmd == NULL )
- return 0;
- if ( codeSigCmd->dataoff < lastSeg->fileoff )
- return 0;
- if ( (codeSigCmd->dataoff + codeSigCmd->datasize) > (lastSeg->fileoff + lastSeg->filesize) )
- return 0;
-
- fsignatures_t siginfo;
- siginfo.fs_file_start=fileOffset; // start of mach-o slice in fat file
- siginfo.fs_blob_start=(void*)(long)(codeSigCmd->dataoff); // start of code-signature in mach-o file
- siginfo.fs_blob_size=codeSigCmd->datasize; // size of code-signature
- int result = fcntl(fd, F_ADDFILESIGS_FOR_DYLD_SIM, &siginfo);
- if ( result == -1 ) {
- dyld::log("fcntl(F_ADDFILESIGS_FOR_DYLD_SIM) failed with errno=%d\n", errno);
- return 0;
- }
- close(fd);
- // file range covered by code signature must extend up to code signature itself
- if ( siginfo.fs_file_start < codeSigCmd->dataoff )
- return 0;
-
- // walk newly mapped dyld_sim __TEXT load commands to find entry point
- uintptr_t entry = 0;
- cmd = (struct load_command*)(((char*)loadAddress)+sizeof(macho_header));
- const uint32_t count = ((macho_header*)(loadAddress))->ncmds;
- for (uint32_t i = 0; i < count; ++i) {
- if (cmd->cmd == LC_UNIXTHREAD) {
- #if __i386__
- const i386_thread_state_t* registers = (i386_thread_state_t*)(((char*)cmd) + 16);
- // entry point must be in first segment
- if ( registers->__eip < firstSeg->vmaddr )
- return 0;
- if ( registers->__eip > (firstSeg->vmaddr + firstSeg->vmsize) )
- return 0;
- entry = (registers->__eip + loadAddress - preferredLoadAddress);
- #elif __x86_64__
- const x86_thread_state64_t* registers = (x86_thread_state64_t*)(((char*)cmd) + 16);
- // entry point must be in first segment
- if ( registers->__rip < firstSeg->vmaddr )
- return 0;
- if ( registers->__rip > (firstSeg->vmaddr + firstSeg->vmsize) )
- return 0;
- entry = (registers->__rip + loadAddress - preferredLoadAddress);
- #endif
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- }
-
- // notify debugger that dyld_sim is loaded
- dyld_image_info info;
- info.imageLoadAddress = (mach_header*)loadAddress;
- info.imageFilePath = strdup(dyldPath);
- info.imageFileModDate = sb.st_mtime;
- addImagesToAllImages(1, &info);
- dyld::gProcessInfo->notification(dyld_image_adding, 1, &info);
-
- const char** appleParams = apple;
- // jump into new simulator dyld
- typedef uintptr_t (*sim_entry_proc_t)(int argc, const char* argv[], const char* envp[], const char* apple[],
- const macho_header* mainExecutableMH, const macho_header* dyldMH, uintptr_t dyldSlide,
- const dyld::SyscallHelpers* vtable, uintptr_t* startGlue);
- sim_entry_proc_t newDyld = (sim_entry_proc_t)entry;
- return (*newDyld)(argc, argv, envp, appleParams, mainExecutableMH, (macho_header*)loadAddress,
- loadAddress - preferredLoadAddress,
- &sSysCalls, startGlue);
-}
-#endif
-
+ halt(dyld::mkstringf("could not load inserted library: %s\n", path));
+ }
+}
//
// Entry point for dyld. The kernel loads dyld and jumps to __dyld_start which
@@ -4738,60 +2767,23 @@
// Returns address of main() in target program which __dyld_start jumps to
//
uintptr_t
-_main(const macho_header* mainExecutableMH, uintptr_t mainExecutableSlide,
- int argc, const char* argv[], const char* envp[], const char* apple[],
- uintptr_t* startGlue)
-{
- uintptr_t result = 0;
- sMainExecutableMachHeader = mainExecutableMH;
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- // if this is host dyld, check to see if iOS simulator is being run
- const char* rootPath = _simple_getenv(envp, "DYLD_ROOT_PATH");
- if ( rootPath != NULL ) {
- // look to see if simulator has its own dyld
- char simDyldPath[PATH_MAX];
- strlcpy(simDyldPath, rootPath, PATH_MAX);
- strlcat(simDyldPath, "/usr/lib/dyld_sim", PATH_MAX);
- int fd = my_open(simDyldPath, O_RDONLY, 0);
- if ( fd != -1 ) {
- result = useSimulatorDyld(fd, mainExecutableMH, simDyldPath, argc, argv, envp, apple, startGlue);
- if ( !result && (*startGlue == 0) )
- halt("problem loading iOS simulator dyld");
- return result;
- }
- }
-#endif
-
- CRSetCrashLogMessage("dyld: launch started");
-
-#if LOG_BINDINGS
- char bindingsLogPath[256];
-
- const char* shortProgName = "unknown";
- if ( argc > 0 ) {
- shortProgName = strrchr(argv[0], '/');
- if ( shortProgName == NULL )
- shortProgName = argv[0];
- else
- ++shortProgName;
- }
- mysprintf(bindingsLogPath, "/tmp/bindings/%d-%s", getpid(), shortProgName);
- sBindingsLogfile = open(bindingsLogPath, O_WRONLY | O_CREAT, 0666);
- if ( sBindingsLogfile == -1 ) {
- ::mkdir("/tmp/bindings", 0777);
- sBindingsLogfile = open(bindingsLogPath, O_WRONLY | O_CREAT, 0666);
- }
- //dyld::log("open(%s) => %d, errno = %d\n", bindingsLogPath, sBindingsLogfile, errno);
-#endif
+_main(const struct mach_header* mainExecutableMH, uintptr_t mainExecutableSlide, int argc, const char* argv[], const char* envp[], const char* apple[])
+{
setContext(mainExecutableMH, argc, argv, envp, apple);
-
+
// Pickup the pointer to the exec path.
- sExecPath = _simple_getenv(apple, "executable_path");
-
- // <rdar://problem/13868260> Remove interim apple[0] transition code from dyld
- if (!sExecPath) sExecPath = apple[0];
-
+ sExecPath = apple[0];
bool ignoreEnvironmentVariables = false;
+#if __i386__
+ if ( isRosetta() ) {
+ // under Rosetta (x86 side)
+ // When a 32-bit ppc program is run under emulation on an Intel processor,
+ // we want any i386 dylibs (e.g. any used by Rosetta) to not load in the shared region
+ // because the shared region is being used by ppc dylibs
+ gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
+ ignoreEnvironmentVariables = true;
+ }
+#endif
if ( sExecPath[0] != '/' ) {
// have relative path, use cwd to make absolute
char cwdbuff[MAXPATHLEN];
@@ -4804,93 +2796,39 @@
sExecPath = s;
}
}
- // Remember short name of process for later logging
- sExecShortName = ::strrchr(sExecPath, '/');
- if ( sExecShortName != NULL )
- ++sExecShortName;
+ uintptr_t result = 0;
+ sMainExecutableMachHeader = mainExecutableMH;
+ sMainExecutableIsSetuid = issetugid();
+ if ( sMainExecutableIsSetuid )
+ pruneEnvironmentVariables(envp, &apple);
else
- sExecShortName = sExecPath;
- sProcessIsRestricted = processRestricted(mainExecutableMH, &ignoreEnvironmentVariables, &sProcessRequiresLibraryValidation);
- if ( sProcessIsRestricted ) {
-#if SUPPORT_LC_DYLD_ENVIRONMENT
- checkLoadCommandEnvironmentVariables();
-#endif
- pruneEnvironmentVariables(envp, &apple);
- // set again because envp and apple may have changed or moved
- setContext(mainExecutableMH, argc, argv, envp, apple);
- }
- else {
- if ( !ignoreEnvironmentVariables )
- checkEnvironmentVariables(envp);
- defaultUninitializedFallbackPaths(envp);
- }
- if ( sEnv.DYLD_PRINT_OPTS )
+ checkEnvironmentVariables(envp, ignoreEnvironmentVariables);
+ if ( sEnv.DYLD_PRINT_OPTS )
printOptions(argv);
if ( sEnv.DYLD_PRINT_ENV )
printEnvironmentVariables(envp);
- getHostInfo(mainExecutableMH, mainExecutableSlide);
+ getHostInfo();
// install gdb notifier
stateToHandlers(dyld_image_state_dependents_mapped, sBatchHandlers)->push_back(notifyGDB);
- stateToHandlers(dyld_image_state_mapped, sSingleHandlers)->push_back(updateAllImages);
// make initial allocations large enough that it is unlikely to need to be re-alloced
- sAllImages.reserve(INITIAL_IMAGE_COUNT);
+ sAllImages.reserve(200);
sImageRoots.reserve(16);
sAddImageCallbacks.reserve(4);
sRemoveImageCallbacks.reserve(4);
sImageFilesNeedingTermination.reserve(16);
sImageFilesNeedingDOFUnregistration.reserve(8);
-#ifdef WAIT_FOR_SYSTEM_ORDER_HANDSHAKE
- // <rdar://problem/6849505> Add gating mechanism to dyld support system order file generation process
- WAIT_FOR_SYSTEM_ORDER_HANDSHAKE(dyld::gProcessInfo->systemOrderFlag);
-#endif
-
-
try {
- // add dyld itself to UUID list
- addDyldImageToUUIDList();
- CRSetCrashLogMessage(sLoadingCrashMessage);
// instantiate ImageLoader for main executable
sMainExecutable = instantiateFromLoadedImage(mainExecutableMH, mainExecutableSlide, sExecPath);
+ sMainExecutable->setNeverUnload();
gLinkContext.mainExecutable = sMainExecutable;
- gLinkContext.processIsRestricted = sProcessIsRestricted;
- gLinkContext.processRequiresLibraryValidation = sProcessRequiresLibraryValidation;
- gLinkContext.mainExecutableCodeSigned = hasCodeSignatureLoadCommand(mainExecutableMH);
-
-#if TARGET_IPHONE_SIMULATOR
- #if TARGET_OS_WATCH || TARGET_OS_TV
- // disable error during bring up of these simulators
- #else
- // check main executable is not too new for this OS
- {
- if ( ! isSimulatorBinary((uint8_t*)mainExecutableMH, sExecPath) ) {
- throwf("program was built for Mac OS X and cannot be run in simulator");
- }
- uint32_t mainMinOS = sMainExecutable->minOSVersion();
- // dyld is always built for the current OS, so we can get the current OS version
- // from the load command in dyld itself.
- uint32_t dyldMinOS = ImageLoaderMachO::minOSVersion((const mach_header*)&__dso_handle);
- if ( mainMinOS > dyldMinOS ) {
- throwf("app was built for iOS %d.%d which is newer than this simulator %d.%d",
- mainMinOS >> 16, ((mainMinOS >> 8) & 0xFF),
- dyldMinOS >> 16, ((dyldMinOS >> 8) & 0xFF));
- }
- }
- #endif
-#endif
-
// load shared cache
checkSharedRegionDisable();
#if DYLD_SHARED_CACHE_SUPPORT
if ( gLinkContext.sharedRegionMode != ImageLoader::kDontUseSharedRegion )
mapSharedCache();
#endif
-
- // Now that shared cache is loaded, setup an versioned dylib overrides
- #if SUPPORT_VERSIONED_PATHS
- checkVersionedPaths();
- #endif
-
// load any inserted libraries
if ( sEnv.DYLD_INSERT_LIBRARIES != NULL ) {
for (const char* const* lib = sEnv.DYLD_INSERT_LIBRARIES; *lib != NULL; ++lib)
@@ -4902,12 +2840,13 @@
// link main executable
gLinkContext.linkingMainExecutable = true;
- link(sMainExecutable, sEnv.DYLD_BIND_AT_LAUNCH, true, ImageLoader::RPathChain(NULL, NULL));
- sMainExecutable->setNeverUnloadRecursive();
+ link(sMainExecutable, sEnv.DYLD_BIND_AT_LAUNCH, ImageLoader::RPathChain(NULL, NULL));
+ gLinkContext.linkingMainExecutable = false;
if ( sMainExecutable->forceFlat() ) {
gLinkContext.bindFlat = true;
gLinkContext.prebindUsage = ImageLoader::kUseNoPrebinding;
}
+ result = (uintptr_t)sMainExecutable->getMain();
// link any inserted libraries
// do this after linking main executable so that any dylibs pulled in by inserted
@@ -4915,74 +2854,30 @@
if ( sInsertedDylibCount > 0 ) {
for(unsigned int i=0; i < sInsertedDylibCount; ++i) {
ImageLoader* image = sAllImages[i+1];
- link(image, sEnv.DYLD_BIND_AT_LAUNCH, true, ImageLoader::RPathChain(NULL, NULL));
- image->setNeverUnloadRecursive();
- }
- // only INSERTED libraries can interpose
- // register interposing info after all inserted libraries are bound so chaining works
- for(unsigned int i=0; i < sInsertedDylibCount; ++i) {
- ImageLoader* image = sAllImages[i+1];
- image->registerInterposing();
- }
- }
-
- // <rdar://problem/19315404> dyld should support interposition even without DYLD_INSERT_LIBRARIES
- for (int i=sInsertedDylibCount+1; i < sAllImages.size(); ++i) {
- ImageLoader* image = sAllImages[i];
- if ( image->inSharedCache() )
- continue;
- image->registerInterposing();
- }
-
- // apply interposing to initial set of images
- for(int i=0; i < sImageRoots.size(); ++i) {
- sImageRoots[i]->applyInterposing(gLinkContext);
- }
- gLinkContext.linkingMainExecutable = false;
+ link(image, sEnv.DYLD_BIND_AT_LAUNCH, ImageLoader::RPathChain(NULL, NULL));
+ }
+ }
- // <rdar://problem/12186933> do weak binding only after all inserted images linked
- sMainExecutable->weakBind(gLinkContext);
-
- CRSetCrashLogMessage("dyld: launch, running initializers");
#if SUPPORT_OLD_CRT_INITIALIZATION
// Old way is to run initializers via a callback from crt1.o
if ( ! gRunInitializersOldWay )
- initializeMainExecutable();
- #else
- // run all initializers
- initializeMainExecutable();
#endif
- // find entry point for main executable
- result = (uintptr_t)sMainExecutable->getThreadPC();
- if ( result != 0 ) {
- // main executable uses LC_MAIN, needs to return to glue in libdyld.dylib
- if ( (gLibSystemHelpers != NULL) && (gLibSystemHelpers->version >= 9) )
- *startGlue = (uintptr_t)gLibSystemHelpers->startGlueToCallExit;
- else
- halt("libdyld.dylib support not present for LC_MAIN");
- }
- else {
- // main executable uses LC_UNIXTHREAD, dyld needs to let "start" in program set up for main()
- result = (uintptr_t)sMainExecutable->getMain();
- *startGlue = 0;
- }
+ initializeMainExecutable(); // run all initializers
}
catch(const char* message) {
- syncAllImages();
halt(message);
}
catch(...) {
dyld::log("dyld: launch failed\n");
}
- CRSetCrashLogMessage(NULL);
-
return result;
}
-} // namespace
-
-
-
+
+}; // namespace
+
+
+