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--- dyld/dyld-210.2.3/src/dyld.cpp
+++ dyld/dyld-43/src/dyld.cpp
@@ -1,6 +1,6 @@
/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
*
- * Copyright (c) 2004-2010 Apple Inc. All rights reserved.
+ * Copyright (c) 2004-2005 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
@@ -25,105 +25,42 @@
#include <stdint.h>
#include <string.h>
#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 <sys/types.h>
#include <sys/stat.h>
-#include <sys/syscall.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 <Kernel/sys/codesign.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 VM_PROT_SLIDE
- #define VM_PROT_SLIDE 0x20
-#endif
#include <vector>
-#include <algorithm>
#include "mach-o/dyld_gdb.h"
#include "dyld.h"
#include "ImageLoader.h"
#include "ImageLoaderMachO.h"
-#include "dyldLibSystemInterface.h"
-#if DYLD_SHARED_CACHE_SUPPORT
-#include "dyld_cache_format.h"
+#include "dyldLibSystemThreadHelpers.h"
+
+
+#define CPU_TYPE_MASK 0x00FFFFFF /* complement of CPU_ARCH_MASK */
+
+
+/* implemented in dyld_gdb.cpp */
+void addImagesToAllImages(uint32_t infoCount, const dyld_image_info info[]);
+void removeImageFromAllImages(const mach_header* mh);
+#if OLD_GDB_DYLD_INTERFACE
+void addImageForgdb(const mach_header* mh, uintptr_t slide, const char* physicalPath, const char* logicalPath);
+void removeImageForgdb(const struct mach_header* mh);
#endif
-#if CORESYMBOLICATION_SUPPORT
-#include "coreSymbolicationDyldSupport.hpp"
-#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);
-
-
-
-// ARM is the only architecture that use cpu-sub-types
-#define CPU_SUBTYPES_SUPPORTED __arm__
-
-
-
-#define CPU_TYPE_MASK 0x00FFFFFF /* complement of CPU_ARCH_MASK */
-
-
-/* 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[]);
// magic so CrashReporter logs message
extern "C" {
char error_string[1024];
}
-// 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" void* __dso_handle;
//
@@ -147,21 +84,15 @@
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;
bool DYLD_PRINT_STATISTICS;
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
@@ -169,255 +100,38 @@
// 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
// DYLD_IGNORE_PREBINDING ==> gLinkContext.prebindUsage
// DYLD_PREBIND_DEBUG ==> gLinkContext.verbosePrebinding
// DYLD_NEW_LOCAL_SHARED_REGIONS ==> gLinkContext.sharedRegionMode
// DYLD_SHARED_REGION ==> gLinkContext.sharedRegionMode
+ // DYLD_SLIDE_AND_PACK_DYLIBS ==> gLinkContext.slideAndPackDylibs
// DYLD_PRINT_WARNINGS ==> gLinkContext.verboseWarnings
- // DYLD_PRINT_RPATHS ==> gLinkContext.verboseRPaths
- // DYLD_PRINT_INTERPOSING ==> gLinkContext.verboseInterposing
};
-
-typedef std::vector<dyld_image_state_change_handler> StateHandlers;
-struct RegisteredDOF { const mach_header* mh; int registrationID; };
-struct DylibOverride { const char* installName; const char* override; };
-
-enum RestrictedReason { restrictedNot, restrictedBySetGUid, restrictedBySegment, restrictedByEntitlements };
-
+
// all global state
static const char* sExecPath = 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 RestrictedReason sRestrictedReason = restrictedNot;
-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;
+static std::vector<ImageLoader*> sImagesToNotifyAboutOtherImages;
static std::vector<ImageCallback> sAddImageCallbacks;
static std::vector<ImageCallback> sRemoveImageCallbacks;
-static StateHandlers sSingleHandlers[7];
-static StateHandlers sBatchHandlers[7];
static ImageLoader* sLastImageByAddressCache;
static EnvironmentVariables sEnv;
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 };
+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;
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
- bool gSharedCacheOverridden = false;
- static const char* sSharedCacheDir = IPHONE_DYLD_SHARED_CACHE_DIR;
- static bool sDylibsOverrideCache = false;
-#else
- static const char* sSharedCacheDir = MACOSX_DYLD_SHARED_CACHE_DIR;
-#endif
-#endif
ImageLoader::LinkContext gLinkContext;
bool gLogAPIs = false;
-const struct LibSystemHelpers* gLibSystemHelpers = NULL;
-#if SUPPORT_OLD_CRT_INITIALIZATION
-bool gRunInitializersOldWay = false;
-#endif
-static std::vector<DylibOverride> sDylibOverrides;
-
-//
-// 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;
-}
-
-
-
-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";
-}
-
-
-//#define ALTERNATIVE_LOGFILE "/dev/console"
-
-static int sLogfile = STDERR_FILENO;
-
-#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
-
-void log(const char* format, ...)
-{
- va_list list;
- va_start(list, format);
- _simple_vdprintf(sLogfile, format, list);
- va_end(list);
-}
-
-void warn(const char* format, ...)
-{
- _simple_dprintf(sLogfile, "dyld: warning, ");
- va_list list;
- va_start(list, format);
- _simple_vdprintf(sLogfile, format, list);
- va_end(list);
-}
-
-
-// <rdar://problem/8867781> control access to sAllImages through a lock
-// because global dyld lock is not held during initialization phase of dlopen()
-static long sAllImagesLock = 0;
-
-static void allImagesLock()
-{
- //dyld::log("allImagesLock()\n");
- while ( ! OSAtomicCompareAndSwapPtrBarrier((void*)0, (void*)1, (void**)&sAllImagesLock) ) {
- // spin
- }
-}
-
-static void allImagesUnlock()
-{
- //dyld::log("allImagesUnlock()\n");
- while ( ! OSAtomicCompareAndSwapPtrBarrier((void*)1, (void*)0, (void**)&sAllImagesLock) ) {
- // spin
- }
-}
-
+const struct ThreadingHelpers* gThreadHelpers = NULL;
@@ -432,317 +146,60 @@
};
FileOpener::FileOpener(const char* path)
- : fd(-1)
{
fd = open(path, O_RDONLY, 0);
}
FileOpener::~FileOpener()
{
- if ( fd != -1 )
- close(fd);
-}
-
-
-static void registerDOFs(const std::vector<ImageLoader::DOFInfo>& dofs)
-{
- const unsigned int dofSectionCount = dofs.size();
- if ( !sEnv.DYLD_DISABLE_DOFS && (dofSectionCount != 0) ) {
- int fd = open("/dev/" DTRACEMNR_HELPER, O_RDWR);
- if ( fd < 0 ) {
- //dyld::warn("can't open /dev/" DTRACEMNR_HELPER " to register dtrace DOF sections\n");
- }
- else {
- // allocate a buffer on the stack for the variable length dof_ioctl_data_t type
- uint8_t buffer[sizeof(dof_ioctl_data_t) + dofSectionCount*sizeof(dof_helper_t)];
- dof_ioctl_data_t* ioctlData = (dof_ioctl_data_t*)buffer;
-
- // fill in buffer with one dof_helper_t per DOF section
- ioctlData->dofiod_count = dofSectionCount;
- for (unsigned int i=0; i < dofSectionCount; ++i) {
- strlcpy(ioctlData->dofiod_helpers[i].dofhp_mod, dofs[i].imageShortName, DTRACE_MODNAMELEN);
- ioctlData->dofiod_helpers[i].dofhp_dof = (uintptr_t)(dofs[i].dof);
- ioctlData->dofiod_helpers[i].dofhp_addr = (uintptr_t)(dofs[i].dof);
- }
-
- // tell kernel about all DOF sections en mas
- // pass pointer to ioctlData because ioctl() only copies a fixed size amount of data into kernel
- user_addr_t val = (user_addr_t)(unsigned long)ioctlData;
- if ( ioctl(fd, DTRACEHIOC_ADDDOF, &val) != -1 ) {
- // kernel returns a unique identifier for each section in the dofiod_helpers[].dofhp_dof field.
- for (unsigned int i=0; i < dofSectionCount; ++i) {
- RegisteredDOF info;
- info.mh = dofs[i].imageHeader;
- info.registrationID = (int)(ioctlData->dofiod_helpers[i].dofhp_dof);
- sImageFilesNeedingDOFUnregistration.push_back(info);
- if ( gLinkContext.verboseDOF ) {
- 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");
- }
- close(fd);
- }
- }
-}
-
-static void unregisterDOF(int registrationID)
-{
- int fd = open("/dev/" DTRACEMNR_HELPER, O_RDWR);
- if ( fd < 0 ) {
- dyld::warn("can't open /dev/" DTRACEMNR_HELPER " to unregister dtrace DOF section\n");
- }
- else {
- ioctl(fd, DTRACEHIOC_REMOVE, registrationID);
- close(fd);
- if ( gLinkContext.verboseInit )
- dyld::warn("unregistering DOF section ID=0x%08X with dtrace\n", registrationID);
- }
-}
-
-
-//
-// _dyld_register_func_for_add_image() is implemented as part of the general image state change notification
-//
-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();
- }
-}
-
-
-
-// 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);
- return NULL;
-}
-
-
-static StateHandlers* stateToHandlers(dyld_image_states state, StateHandlers handlersArray[8])
-{
- switch ( state ) {
- case dyld_image_state_mapped:
- return &handlersArray[0];
-
- case dyld_image_state_dependents_mapped:
- return &handlersArray[1];
-
- case dyld_image_state_rebased:
- return &handlersArray[2];
-
- case dyld_image_state_bound:
- return &handlersArray[3];
-
- case dyld_image_state_dependents_initialized:
- return &handlersArray[4];
-
- case dyld_image_state_initialized:
- return &handlersArray[5];
-
- case dyld_image_state_terminated:
- 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());
- 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();
- 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) ) {
- //fprintf(stderr, " image rejected by handler=%p\n", *it);
- // make copy of thrown string so that later catch clauses can free it
- const char* str = strdup(result);
- throw str;
- }
- }
- }
- 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);
- }
- }
- }
-#if CORESYMBOLICATION_SUPPORT
- // mach message csdlc about dynamically loaded images
- if ( image->addFuncNotified() && (state == dyld_image_state_terminated) ) {
- if ( sEnv.DYLD_PRINT_CS_NOTIFICATIONS ) {
- dyld::log("dyld core symbolication unload notification: %p %s\n", image->machHeader(), image->getPath());
- }
- if ( dyld_all_image_infos.coreSymbolicationShmPage != NULL) {
- CSCppDyldSharedMemoryPage* connection = (CSCppDyldSharedMemoryPage*)dyld_all_image_infos.coreSymbolicationShmPage;
- if ( connection->is_valid_version() ) {
- coresymbolication_unload_image(connection, image);
- }
- }
- }
-#endif
-}
-
-
-
-
-//
-// 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_all_image_infos.
-// 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_all_image_infos.infoArrayCount;
- const dyld_image_info* existing = dyld_all_image_infos.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)
-{
- const ImageLoader* left = *((ImageLoader**)l);
- const ImageLoader* right= *((ImageLoader**)r);
- return left->compare(right);
-}
-
-static void notifyBatchPartial(dyld_image_states state, bool orLater, dyld_image_state_change_handler onlyHandler)
-{
- 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;
- }
- if ( sBundleBeingLoaded != NULL ) {
- dyld_image_states imageState = sBundleBeingLoaded->getState();
- if ( (imageState == state) || (orLater && (imageState > state)) )
- *end++ = sBundleBeingLoaded;
- }
- const char* dontLoadReason = NULL;
- unsigned int count = end-images;
- if ( end != images ) {
- // sort bottom up
- qsort(images, count, sizeof(ImageLoader*), &imageSorter);
- // build info array
- dyld_image_info infos[count];
- for (unsigned int i=0; i < count; ++i) {
- dyld_image_info* p = &infos[i];
- ImageLoader* image = images[i];
- //dyld::log(" state=%d, name=%s\n", state, image->getPath());
- p->imageLoadAddress = image->machHeader();
- p->imageFilePath = image->getRealPath();
- p->imageFileModDate = image->lastModified();
- // special case for add_image hook
- if ( state == dyld_image_state_bound )
- notifyAddImageCallbacks(image);
- }
-
- if ( onlyHandler != NULL ) {
- const char* result = (*onlyHandler)(state, count, infos);
- 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);
- }
- }
- else {
- // call each handler with whole array
- for (std::vector<dyld_image_state_change_handler>::iterator it = handlers->begin(); it != handlers->end(); ++it) {
- const char* result = (*it)(state, count, infos);
- 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;
- }
- }
- }
- }
- allImagesUnlock();
- if ( dontLoadReason != NULL )
- throw dontLoadReason;
- }
-#if CORESYMBOLICATION_SUPPORT
- if ( state == dyld_image_state_rebased ) {
- if ( sEnv.DYLD_PRINT_CS_NOTIFICATIONS ) {
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- dyld_image_states imageState = (*it)->getState();
- if ( (imageState == dyld_image_state_rebased) || (orLater && (imageState > dyld_image_state_rebased)) )
- dyld::log("dyld core symbolication load notification: %p %s\n", (*it)->machHeader(), (*it)->getPath());
- }
- }
- if ( dyld_all_image_infos.coreSymbolicationShmPage != NULL) {
- CSCppDyldSharedMemoryPage* connection = (CSCppDyldSharedMemoryPage*)dyld_all_image_infos.coreSymbolicationShmPage;
- if ( connection->is_valid_version() ) {
- // This needs to be captured now
- uint64_t load_timestamp = mach_absolute_time();
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- dyld_image_states imageState = (*it)->getState();
- if ( (imageState == state) || (orLater && (imageState > state)) )
- coresymbolication_load_image(connection, *it, load_timestamp);
- }
- }
- }
- }
-#endif
-}
-
-
-
-static void notifyBatch(dyld_image_states state)
-{
- notifyBatchPartial(state, false, NULL);
-}
+ close(fd);
+}
+
+
+
+// Objective-C installs an addImage hook to dyld to get notified about new images
+// The callback needs to be run after the image is rebased and bound, but before its initializers are called
+static uint32_t imageNotification(ImageLoader* image, uint32_t startIndex)
+{
+ // tell all register add image handlers about this
+ const uint32_t callbackCount = sAddImageCallbacks.size();
+ for (uint32_t i=startIndex; i < callbackCount; ++i) {
+ ImageCallback cb = sAddImageCallbacks[i];
+ //fprintf(stderr, "dyld: calling add-image-callback[%d]=%p for %s\n", i, cb, image->getPath());
+ (cb)(image->machHeader(), image->getSlide());
+ }
+ return callbackCount;
+}
+
+
+
+// notify gdb et al about these new images
+static void notifyAdding(std::vector<ImageLoader*>& images)
+{
+ // build array
+ unsigned int len = images.size();
+ if ( len != 0 ) {
+ dyld_image_info infos[len];
+ for (unsigned int i=0; i < len; ++i) {
+ dyld_image_info* p = &infos[i];
+ ImageLoader* image = images[i];
+ p->imageLoadAddress = image->machHeader();
+ p->imageFilePath = image->getPath();
+ p->imageFileModDate = image->lastModified();
+ //fprintf(stderr, "notifying objc about %s\n", image->getPath());
+ }
+
+ // tell gdb
+ addImagesToAllImages(len, infos);
+
+ // 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, len, infos);
+ }
+ }
+}
+
+
// In order for register_func_for_add_image() callbacks to to be called bottom up,
// we need to maintain a list of root images. The main executable is usally the
@@ -750,89 +207,43 @@
// If DYLD_INSERT_LIBRARIES is used, those libraries are first.
static void addRootImage(ImageLoader* image)
{
- //dyld::log("addRootImage(%p, %s)\n", image, image->getPath());
+ //fprintf(stderr, "addRootImage(%p, %s)\n", image, image->getPath());
// add to list of roots
sImageRoots.push_back(image);
}
-
-static void clearAllDepths()
-{
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++)
- (*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 sAllImages.size();
-}
-
-
-static void setNewProgramVars(const ProgramVars& newVars)
-{
- // make a copy of the pointers to program variables
- gLinkContext.programVars = newVars;
-
- // now set each program global to their initial value
- *gLinkContext.programVars.NXArgcPtr = gLinkContext.argc;
- *gLinkContext.programVars.NXArgvPtr = gLinkContext.argv;
- *gLinkContext.programVars.environPtr = gLinkContext.envp;
- *gLinkContext.programVars.__prognamePtr = gLinkContext.progname;
-}
-
-#if SUPPORT_OLD_CRT_INITIALIZATION
-static void setRunInitialzersOldWay()
-{
- gRunInitializersOldWay = true;
-}
+// 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);
+}
+
+static void addImage(ImageLoader* image)
+{
+ // add to master list
+ sAllImages.push_back(image);
+
+ if ( sEnv.DYLD_PRINT_LIBRARIES || (sEnv.DYLD_PRINT_LIBRARIES_POST_LAUNCH && (sMainExecutable!=NULL) && sMainExecutable->isLinked()) ) {
+ uint64_t offset = image->getOffsetInFatFile();
+ if ( offset == 0 )
+ fprintf(stderr, "dyld: loaded: %s\n", image->getPath());
+ else
+ fprintf(stderr, "dyld: loaded: %s, cpu-sub-type: %d\n", image->getPath(), image->machHeader()->cpusubtype);
+ }
+
+#if OLD_GDB_DYLD_INTERFACE
+ // let gdb find out about this
+ addImageForgdb(image->machHeader(), image->getSlide(), image->getPath(), image->getLogicalPath());
#endif
-
-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);
-
-
- if ( sEnv.DYLD_PRINT_LIBRARIES || (sEnv.DYLD_PRINT_LIBRARIES_POST_LAUNCH && (sMainExecutable!=NULL) && sMainExecutable->isLinked()) ) {
- dyld::log("dyld: loaded: %s\n", image->getPath());
- }
-
}
void removeImage(ImageLoader* image)
{
+ // flush find-by-address cache
+ if ( sLastImageByAddressCache == image )
+ sLastImageByAddressCache = NULL;
+
// 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 ) {
@@ -842,49 +253,27 @@
}
}
- // 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() ) {
- unregisterDOF(it->registrationID);
- sImageFilesNeedingDOFUnregistration.erase(it);
- // don't increment iterator, the erase caused next element to be copied to where this iterator points
- }
- else {
- ++it;
- }
- }
-
- // tell all registered remove 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 ) {
- for (std::vector<ImageCallback>::iterator it=sRemoveImageCallbacks.begin(); it != sRemoveImageCallbacks.end(); it++) {
- (*it)(image->machHeader(), image->getSlide());
- }
- }
-
- // notify
- notifySingle(dyld_image_state_terminated, image);
-
- // <rdar://problem/7740779> dyld should directly call __cxa_finalize()
- if ( (gLibSystemHelpers != NULL) && (gLibSystemHelpers->version >= 8) )
- (*gLibSystemHelpers->cxa_finalize)(image->machHeader());
-
- // remove from mapped images table
- removedMappedRanges(image);
-
+ // tell all register add image handlers about this
+ // do this before removing image from internal data structures so that the callback can querey dyld about the image
+ for (std::vector<ImageCallback>::iterator it=sRemoveImageCallbacks.begin(); it != sRemoveImageCallbacks.end(); it++) {
+ (*it)(image->machHeader(), image->getSlide());
+ }
+
// 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();
-
- // 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;
+ for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
+ if ( *it == image ) {
+ sAllImages.erase(it);
+ break;
+ }
+ }
+
+ // 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;
+ }
+ }
// if in root list, pull it out
for (std::vector<ImageLoader*>::iterator it=sImageRoots.begin(); it != sImageRoots.end(); it++) {
@@ -894,13 +283,14 @@
}
}
- // log if requested
- if ( sEnv.DYLD_PRINT_LIBRARIES || (sEnv.DYLD_PRINT_LIBRARIES_POST_LAUNCH && (sMainExecutable!=NULL) && sMainExecutable->isLinked()) ) {
- dyld::log("dyld: unloaded: %s\n", image->getPath());
- }
-
// tell gdb, new way
removeImageFromAllImages(image->machHeader());
+
+#if OLD_GDB_DYLD_INTERFACE
+ // tell gdb, old way
+ removeImageForgdb(image->machHeader());
+ gdb_dyld_state_changed();
+#endif
}
@@ -917,34 +307,24 @@
void initializeMainExecutable()
{
- // apply interposing to initial set of images
- // do this before making the __IMPORT segments in shared cache read-only
- sMainExecutable->applyInterposing(gLinkContext);
-
- // record that we've reached this step
- gLinkContext.startedInitializingMainExecutable = true;
-
- // run initialzers for any inserted dylibs
- ImageLoader::InitializerTimingList initializerTimes[sAllImages.size()];
const int rootCount = sImageRoots.size();
- if ( rootCount > 1 ) {
- for(int i=1; i < rootCount; ++i) {
- initializerTimes[0].count = 0;
- sImageRoots[i]->runInitializers(gLinkContext, initializerTimes[0]);
- }
- }
-
- // run initializers for main executable and everything it brings up
- initializerTimes[0].count = 0;
- sMainExecutable->runInitializers(gLinkContext, initializerTimes[0]);
-
- // register atexit() handler to run terminators in all loaded images when this process exits
- if ( gLibSystemHelpers != NULL )
- (*gLibSystemHelpers->cxa_atexit)(&runTerminators, NULL, NULL);
-
- // dump info if requested
+ for(int i=0; i < rootCount; ++i) {
+ ImageLoader* image = sImageRoots[i];
+ //fprintf(stderr, "initializeMainExecutable: image = %p\n", image);
+ image->runInitializers(gLinkContext);
+ }
+/*
+ // this does not work???
+ for (std::vector<ImageLoader*>::iterator it=sImageRoots.begin(); it != sImageRoots.end(); it++) {
+ ImageLoader* image = *it;
+ fprintf(stderr, "initializeMainExecutable: image = %p\n", image);
+ // don't know why vector sometimes starts with NULL element???
+ if ( image != NULL )
+ image->runInitializers(gLinkContext);
+ }
+*/
if ( sEnv.DYLD_PRINT_STATISTICS )
- ImageLoaderMachO::printStatistics(sAllImages.size(), initializerTimes[0]);
+ ImageLoaderMachO::printStatistics(sAllImages.size());
}
bool mainExecutablePrebound()
@@ -958,149 +338,27 @@
}
-void runTerminators(void* extra)
-{
- try {
- const unsigned int imageCount = sImageFilesNeedingTermination.size();
- for(unsigned int 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);
- }
-}
-
-
-#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) ) {
- //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));
- it->override = strdup(dylibFile);
- break;
- }
- }
- }
- }
- if ( ! entryExists ) {
- DylibOverride entry;
- entry.installName = strdup(sysInstallName);
- 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];
- int dirPathLen = strlen(dirPath);
- strlcpy(dylibPath, dirPath, PATH_MAX);
- 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;
- dylibPath[dirPathLen] = '/';
- dylibPath[dirPathLen+1] = '\0';
- 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];
- int dirPathLen = strlen(dirPath);
- strlcpy(frameworkPath, dirPath, PATH_MAX);
- 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;
- frameworkPath[dirPathLen] = '/';
- frameworkPath[dirPathLen+1] = '\0';
- 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()
+{
+ const unsigned int imageCount = sImageFilesNeedingTermination.size();
+ for(unsigned int i=imageCount; i > 0; --i){
+ ImageLoader* image = sImageFilesNeedingTermination[i-1];
+ image->doTermination(gLinkContext);
+ }
+ sImageFilesNeedingTermination.clear();
+}
+
+
+//
+// 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 == ':')
@@ -1113,91 +371,53 @@
for(const char* s=list; *s != '\0'; ++s) {
if (*s == ':') {
int len = s-start;
- if ( (mainExecutableDir != NULL) && (strncmp(start, "@loader_path/", 13) == 0) ) {
- int 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) ) {
- int 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;
- }
+ char* str = new char[len+1];
+ strncpy(str, start, len);
+ str[len] = '\0';
+ start = &s[1];
+ result[index++] = str;
}
}
int len = strlen(start);
- if ( (mainExecutableDir != NULL) && (strncmp(start, "@loader_path/", 13) == 0) ) {
- int 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) ) {
- int 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;
- }
+ 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;
- }
-}
-
+/*
+ * Library path searching is not done for setuid programs
+ * which are not run by the real user. Futher the
+ * evironment varaible for the library path is cleared so
+ * that if this program executes a non-set uid program this
+ * part of the evironment will not be passed along so that
+ * that program also will not have it's libraries searched
+ * for.
+ */
+ static bool riskyUser()
+ {
+ static bool checked = false;
+ static bool risky = false;
+ if ( !checked ) {
+ risky = ( getuid() != 0 && (getuid() != geteuid() || getgid() != getegid()) );
+ checked = true;
+ }
+ return risky;
+ }
+
+static bool disableIfBadUser(char* rhs)
+{
+ bool didDisable = false;
+ if ( riskyUser() ) {
+ *rhs ='\0';
+ didDisable = true;
+ }
+ return didDisable;
+}
+
static void paths_expand_roots(const char **paths, const char *key, const char *val)
{
// assert(val != NULL);
@@ -1218,18 +438,13 @@
static void removePathWithPrefix(const char* paths[], const char* prefix)
{
- size_t prefixLen = strlen(prefix);
- int skip = 0;
- int i;
- for(i = 0; paths[i] != NULL; ++i) {
- if ( strncmp(paths[i], prefix, prefixLen) == 0 )
- ++skip;
- else
- paths[i-skip] = paths[i];
- }
- paths[i-skip] = NULL;
-}
-
+ size_t prefixLen = strlen(prefix);
+ for(int s=0,d=0; (paths[d] != NULL) && (paths[s] != NULL); ++s, ++d) {
+ if ( strncmp(paths[s], prefix, prefixLen) == 0 )
+ ++s;
+ paths[d] = paths[s];
+ }
+}
#if 0
static void paths_dump(const char **paths)
@@ -1238,7 +453,7 @@
const char **strs = paths;
while(*strs != NULL)
{
- dyld::log("\"%s\"\n", *strs);
+ fprintf(stderr, "\"%s\"\n", *strs);
strs++;
}
return;
@@ -1249,7 +464,7 @@
{
uint32_t i = 0;
while ( NULL != argv[i] ) {
- dyld::log("opt[%i] = \"%s\"\n", i, argv[i]);
+ fprintf(stderr, "opt[%i] = \"%s\"\n", i, argv[i]);
i++;
}
}
@@ -1257,42 +472,57 @@
static void printEnvironmentVariables(const char* envp[])
{
while ( NULL != *envp ) {
- dyld::log("%s\n", *envp);
+ fprintf(stderr, "%s\n", *envp);
envp++;
}
}
-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);
+ if ( !disableIfBadUser((char*)value) )
+ sEnv.DYLD_FRAMEWORK_PATH = parseColonList(value);
}
else if ( strcmp(key, "DYLD_FALLBACK_FRAMEWORK_PATH") == 0 ) {
- appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_FALLBACK_FRAMEWORK_PATH);
+ if ( !disableIfBadUser((char*)value) )
+ sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = parseColonList(value);
}
else if ( strcmp(key, "DYLD_LIBRARY_PATH") == 0 ) {
- appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_LIBRARY_PATH);
+ if ( !disableIfBadUser((char*)value) )
+ sEnv.DYLD_LIBRARY_PATH = parseColonList(value);
}
else if ( strcmp(key, "DYLD_FALLBACK_LIBRARY_PATH") == 0 ) {
- appendParsedColonList(value, mainExecutableDir, &sEnv.DYLD_FALLBACK_LIBRARY_PATH);
+ if ( !disableIfBadUser((char*)value) )
+ sEnv.DYLD_FALLBACK_LIBRARY_PATH = parseColonList(value);
}
else if ( (strcmp(key, "DYLD_ROOT_PATH") == 0) || (strcmp(key, "DYLD_PATHS_ROOT") == 0) ) {
- if ( strcmp(value, "/") != 0 ) {
- gLinkContext.rootPaths = parseColonList(value, mainExecutableDir);
- for (int i=0; gLinkContext.rootPaths[i] != NULL; ++i) {
- if ( gLinkContext.rootPaths[i][0] != '/' ) {
- dyld::warn("DYLD_ROOT_PATH not used because it contains a non-absolute path\n");
- gLinkContext.rootPaths = NULL;
- break;
+ if ( !disableIfBadUser((char*)value) ) {
+ if ( strcmp(value, "/") != 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] != '/' ) {
+ fprintf(stderr, "dyld: warning DYLD_ROOT_PATH not used because it contains a non-absolute path");
+ sEnv.DYLD_ROOT_PATH = NULL;
+ }
}
}
}
}
else if ( strcmp(key, "DYLD_IMAGE_SUFFIX") == 0 ) {
- gLinkContext.imageSuffix = value;
+ if ( !disableIfBadUser((char*)value) )
+ gLinkContext.imageSuffix = value;
}
else if ( strcmp(key, "DYLD_INSERT_LIBRARIES") == 0 ) {
- sEnv.DYLD_INSERT_LIBRARIES = parseColonList(value, NULL);
+ if ( !disableIfBadUser((char*)value) )
+ sEnv.DYLD_INSERT_LIBRARIES = parseColonList(value);
+ }
+ else if ( strcmp(key, "DYLD_DEBUG_TRACE") == 0 ) {
+ fprintf(stderr, "dyld: warning DYLD_DEBUG_TRACE not supported\n");
+ }
+ else if ( strcmp(key, "DYLD_ERROR_PRINT") == 0 ) {
+ fprintf(stderr, "dyld: warning DYLD_ERROR_PRINT not supported\n");
}
else if ( strcmp(key, "DYLD_PRINT_OPTS") == 0 ) {
sEnv.DYLD_PRINT_OPTS = true;
@@ -1300,38 +530,61 @@
else if ( strcmp(key, "DYLD_PRINT_ENV") == 0 ) {
sEnv.DYLD_PRINT_ENV = true;
}
- else if ( strcmp(key, "DYLD_DISABLE_DOFS") == 0 ) {
- sEnv.DYLD_DISABLE_DOFS = true;
- }
- else if ( strcmp(key, "DYLD_DISABLE_PREFETCH") == 0 ) {
- gLinkContext.preFetchDisabled = true;
- }
else if ( strcmp(key, "DYLD_PRINT_LIBRARIES") == 0 ) {
sEnv.DYLD_PRINT_LIBRARIES = true;
}
else if ( strcmp(key, "DYLD_PRINT_LIBRARIES_POST_LAUNCH") == 0 ) {
sEnv.DYLD_PRINT_LIBRARIES_POST_LAUNCH = true;
}
+ else if ( strcmp(key, "DYLD_TRACE") == 0 ) {
+ fprintf(stderr, "dyld: warning DYLD_TRACE not supported\n");
+ }
+ else if ( strcmp(key, "DYLD_EBADEXEC_ONLY") == 0 ) {
+ fprintf(stderr, "dyld: warning DYLD_EBADEXEC_ONLY not supported\n");
+ }
else if ( strcmp(key, "DYLD_BIND_AT_LAUNCH") == 0 ) {
sEnv.DYLD_BIND_AT_LAUNCH = true;
}
else if ( strcmp(key, "DYLD_FORCE_FLAT_NAMESPACE") == 0 ) {
gLinkContext.bindFlat = true;
}
+ else if ( strcmp(key, "DYLD_DEAD_LOCK_HANG") == 0 ) {
+ fprintf(stderr, "dyld: warning DYLD_DEAD_LOCK_HANG not supported\n");
+ }
+ else if ( strcmp(key, "DYLD_ABORT_MULTIPLE_INITS") == 0 ) {
+ fprintf(stderr, "dyld: warning DYLD_ABORT_MULTIPLE_INITS not supported\n");
+ }
else if ( strcmp(key, "DYLD_NEW_LOCAL_SHARED_REGIONS") == 0 ) {
- // ignore, no longer relevant but some scripts still set it
+ gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
+ }
+ else if ( strcmp(key, "DYLD_SLIDE_AND_PACK_DYLIBS") == 0 ) {
+ gLinkContext.slideAndPackDylibs = true;
}
else if ( strcmp(key, "DYLD_NO_FIX_PREBINDING") == 0 ) {
+ // since the new dyld never runs fix_prebinding, no need to warn if someone does not want it run
+ //fprintf(stderr, "dyld: warning DYLD_NO_FIX_PREBINDING not supported\n");
}
else if ( strcmp(key, "DYLD_PREBIND_DEBUG") == 0 ) {
gLinkContext.verbosePrebinding = true;
}
+ else if ( strcmp(key, "DYLD_HINTS_DEBUG") == 0 ) {
+ fprintf(stderr, "dyld: warning DYLD_HINTS_DEBUG not supported\n");
+ }
+ else if ( strcmp(key, "DYLD_SAMPLE_DEBUG") == 0 ) {
+ fprintf(stderr, "dyld: warning DYLD_SAMPLE_DEBUG not supported\n");
+ }
+ else if ( strcmp(key, "DYLD_EXECUTABLE_PATH_DEBUG") == 0 ) {
+ fprintf(stderr, "dyld: warning DYLD_EXECUTABLE_PATH_DEBUG not supported\n");
+ }
+ else if ( strcmp(key, "DYLD_TWO_LEVEL_DEBUG") == 0 ) {
+ fprintf(stderr, "dyld: warning DYLD_TWO_LEVEL_DEBUG not supported\n");
+ }
+ else if ( strcmp(key, "DYLD_LAZY_INITIALIZERS") == 0 ) {
+ fprintf(stderr, "dyld: warning DYLD_LAZY_INITIALIZERS not supported\n");
+ }
else if ( strcmp(key, "DYLD_PRINT_INITIALIZERS") == 0 ) {
gLinkContext.verboseInit = true;
}
- else if ( strcmp(key, "DYLD_PRINT_DOFS") == 0 ) {
- gLinkContext.verboseDOF = true;
- }
else if ( strcmp(key, "DYLD_PRINT_STATISTICS") == 0 ) {
sEnv.DYLD_PRINT_STATISTICS = true;
}
@@ -1341,9 +594,6 @@
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;
}
@@ -1352,15 +602,6 @@
}
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_SHARED_REGION") == 0 ) {
if ( strcmp(value, "private") == 0 ) {
@@ -1376,17 +617,9 @@
gLinkContext.sharedRegionMode = ImageLoader::kUseSharedRegion;
}
else {
- 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
+ fprintf(stderr, "dyld: warning unknown option to DYLD_SHARED_REGION. Valid options are: use, private, avoid\n");
+ }
+ }
else if ( strcmp(key, "DYLD_IGNORE_PREBINDING") == 0 ) {
if ( strcmp(value, "all") == 0 ) {
gLinkContext.prebindUsage = ImageLoader::kUseNoPrebinding;
@@ -1401,139 +634,15 @@
gLinkContext.prebindUsage = ImageLoader::kUseSplitSegPrebinding;
}
else {
- 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
+ fprintf(stderr, "dyld: warning unknown option to DYLD_IGNORE_PREBINDING. Valid options are: all, app, nonsplit\n");
+ }
+ }
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)];
- 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 int keyLen = equals-keyEqualsValue;
- 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
-
-
-#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
-
-
-//
-// For security, setuid programs ignore DYLD_* environment variables.
-// Additionally, the DYLD_* enviroment variables are removed
-// from the environment, so that any child processes don't see them.
-//
-static void pruneEnvironmentVariables(const char* envp[], const char*** applep)
-{
- // delete all DYLD_* and LD_LIBRARY_PATH environment variables
- int removedCount = 0;
- const char** d = envp;
- for(const char** s = envp; *s != NULL; s++) {
- if ( (strncmp(*s, "DYLD_", 5) != 0) && (strncmp(*s, "LD_LIBRARY_PATH=", 16) != 0) ) {
- *d++ = *s;
- }
- else {
- ++removedCount;
- }
- }
- *d++ = NULL;
- 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;
- }
- }
-
- // 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;
-}
-
-
-static void checkEnvironmentVariables(const char* envp[], bool ignoreEnviron)
+ fprintf(stderr, "dyld: warning, unknown environment variable: %s\n", key);
+ }
+}
+
+static void checkEnvironmentVariables(const char* envp[])
{
const char* home = NULL;
const char** p;
@@ -1541,13 +650,13 @@
const char* keyEqualsValue = *p;
if ( strncmp(keyEqualsValue, "DYLD_", 5) == 0 ) {
const char* equals = strchr(keyEqualsValue, '=');
- if ( (equals != NULL) && !ignoreEnviron ) {
+ if ( equals != NULL ) {
const char* value = &equals[1];
const int keyLen = equals-keyEqualsValue;
- char key[keyLen+1];
+ char key[keyLen];
strncpy(key, keyEqualsValue, keyLen);
key[keyLen] = '\0';
- processDyldEnvironmentVariable(key, value, NULL);
+ processDyldEnvironmentVarible(key, value);
}
}
else if ( strncmp(keyEqualsValue, "HOME=", 5) == 0 ) {
@@ -1555,93 +664,68 @@
}
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
+ if ( !disableIfBadUser((char*)path) )
+ 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);
+ if ( home != NULL ) {
+ if ( riskyUser() )
+ 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);
+ if ( home != NULL ) {
+ if ( riskyUser() )
+ removePathWithPrefix(paths, "$HOME");
+ else
+ paths_expand_roots(paths, "$HOME", home);
+ }
sEnv.DYLD_FALLBACK_LIBRARY_PATH = paths;
}
-
-#if SUPPORT_VERSIONED_PATHS
- checkVersionedPaths();
-#endif
}
static void getHostInfo()
{
-#if CPU_SUBTYPES_SUPPORTED
-#if __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;
-#elif __ARM_ARCH_7K__
- sHostCPU = CPU_TYPE_ARM;
- sHostCPUsubtype = CPU_SUBTYPE_ARM_V7K;
-#else
+#if 0
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;
#endif
-#endif
-}
-
-static void checkSharedRegionDisable()
-{
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- // 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)) ) {
- gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
- if ( gLinkContext.verboseMapping )
- dyld::warn("disabling shared region because main executable overlaps\n");
- }
-#endif
- // iPhoneOS cannot run without shared region
-}
-
-bool validImage(const ImageLoader* possibleImage)
-{
- const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i) {
- if ( possibleImage == sAllImages[i] ) {
- return true;
- }
- }
+
+ 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";
+}
+
+bool validImage(ImageLoader* possibleImage)
+{
+ const unsigned int imageCount = sAllImages.size();
+ for(unsigned int i=0; i < imageCount; ++i) {
+ if ( possibleImage == sAllImages[i] ) {
+ return true;
+ }
+ }
return false;
}
@@ -1654,31 +738,56 @@
{
if ( index < sAllImages.size() )
return sAllImages[index];
+ else
+ return NULL;
+}
+
+ImageLoader* findImageByMachHeader(const struct mach_header* 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* findImageByMachHeader(const struct mach_header* target)
-{
- return findMappedRange((uintptr_t)target);
-}
-
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 )
+ fprintf(stderr, "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;
}
-
void forEachImageDo( void (*callback)(ImageLoader*, void* userData), void* userData)
@@ -1768,8 +877,6 @@
}
-// only for architectures that use cpu-sub-types
-#if CPU_SUBTYPES_SUPPORTED
const cpu_subtype_t CPU_SUBTYPE_END_OF_LIST = -1;
@@ -1787,49 +894,60 @@
//
-#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, v6, v5, and v4
- { CPU_SUBTYPE_ARM_V7K, 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
+
+
+//
+// 64-bit PowerPC sub-type lists
+//
+const int kPPC64_RowCount = 1;
+static const cpu_subtype_t kPPC64[kPPC64_RowCount][3] = {
+ // G5 can run any 64-bit code
+ { CPU_SUBTYPE_POWERPC_970, CPU_SUBTYPE_POWERPC_ALL, CPU_SUBTYPE_END_OF_LIST },
+};
+
+
+
+//
+// 32-bit x86 sub-type lists
+//
+// TO-DO
+
// 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
+ case CPU_TYPE_POWERPC64:
+ for (int i=0; i < kPPC64_RowCount ; ++i) {
+ if ( kPPC64[i][0] == subtype )
+ return kPPC64[i];
+ }
+ break;
+ case CPU_TYPE_I386:
+ // To do
+ break;
}
return NULL;
}
@@ -1844,7 +962,7 @@
for (uint32_t subTypeIndex=0; list[subTypeIndex] != CPU_SUBTYPE_END_OF_LIST; ++subTypeIndex) {
for(uint32_t fatIndex=0; fatIndex < OSSwapBigToHostInt32(fh->nfat_arch); ++fatIndex) {
if ( ((cpu_type_t)OSSwapBigToHostInt32(archs[fatIndex].cputype) == cpu)
- && (list[subTypeIndex] == (cpu_subtype_t)OSSwapBigToHostInt32(archs[fatIndex].cpusubtype)) ) {
+ && (list[subTypeIndex] == archs[fatIndex].cpusubtype) ) {
*offset = OSSwapBigToHostInt32(archs[fatIndex].offset);
*len = OSSwapBigToHostInt32(archs[fatIndex].size);
return true;
@@ -1876,22 +994,27 @@
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:
+ case CPU_TYPE_POWERPC64:
+ 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
+ case CPU_TYPE_I386:
+ if ( (cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == CPU_SUBTYPE_I386_ALL ) {
+ *offset = OSSwapBigToHostInt32(archs[i].offset);
+ *len = OSSwapBigToHostInt32(archs[i].size);
+ return true;
+ }
+ break;
}
}
}
return false;
}
-#endif // CPU_SUBTYPES_SUPPORTED
//
// A fat file may contain multiple sub-images for the same cpu-type,
@@ -1900,7 +1023,6 @@
//
static bool fatFindBest(const fat_header* fh, uint64_t* offset, uint64_t* len)
{
-#if CPU_SUBTYPES_SUPPORTED
// assume all dylibs loaded must have same cpu type as main executable
const cpu_type_t cpu = sMainExecutableMachHeader->cputype;
@@ -1920,32 +1042,20 @@
// running on an uknown cpu, can only load generic code
return fatFindRunsOnAllCPUs(cpu, fh, offset, len);
-#else
- // just find first slice with matching architecture
- const fat_arch* archs = (fat_arch*)(((char*)fh)+sizeof(fat_header));
- for(uint32_t i=0; i < OSSwapBigToHostInt32(fh->nfat_arch); ++i) {
- if ( (cpu_type_t)OSSwapBigToHostInt32(archs[i].cputype) == sMainExecutableMachHeader->cputype) {
- *offset = OSSwapBigToHostInt32(archs[i].offset);
- *len = OSSwapBigToHostInt32(archs[i].size);
- return true;
- }
- }
- return false;
-#endif
}
//
// 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)
-{
-#if CPU_SUBTYPES_SUPPORTED
- // It is deemed compatible if any of the following are true:
- // 1) mach_header subtype is in list of compatible subtypes for running processor
- // 2) mach_header subtype is same as running processor subtype
- // 3) mach_header subtype runs on all processor variants
+// on the current processor. It is deemed compatible if any of the following are true:
+// 1) mach_header subtype is in list of compatible subtypes for running processor
+// 2) mach_header subtype is same as running processor subtype
+// 3) mach_header subtype runs on all processor variants
+//
+//
+bool isCompatibleMachO(const uint8_t* firstPage)
+{
const mach_header* mh = (mach_header*)firstPage;
if ( mh->magic == sMainExecutableMachHeader->magic ) {
if ( mh->cputype == sMainExecutableMachHeader->cputype ) {
@@ -1959,413 +1069,187 @@
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 )
return true;
}
- // cpu type has no ordered list of subtypes
+ // cpu unknown, so don't know if subtype is compatible
+ // only load _ALL variant
switch (mh->cputype) {
+ case CPU_TYPE_POWERPC:
+ case CPU_TYPE_POWERPC64:
+ if ( mh->cpusubtype == CPU_SUBTYPE_POWERPC_ALL )
+ return true;
+ break;
case CPU_TYPE_I386:
- case CPU_TYPE_X86_64:
- // subtypes are not used or these architectures
- return true;
- }
- }
- }
-#else
- // For architectures that don't support cpu-sub-types
- // this just check the cpu type.
- const mach_header* mh = (mach_header*)firstPage;
- if ( mh->magic == sMainExecutableMachHeader->magic ) {
- if ( mh->cputype == sMainExecutableMachHeader->cputype ) {
- return true;
- }
- }
-#endif
+ if ( mh->cpusubtype == CPU_SUBTYPE_I386_ALL )
+ return true;
+ break;
+ }
+ }
+ }
return false;
}
-
-
// 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, 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(path, mh, 0, gLinkContext);
addImage(image);
return image;
}
- throw "main executable not a known format";
-}
-
-
-#if DYLD_SHARED_CACHE_SUPPORT
-static bool findInSharedCacheImage(const char* path, const struct stat* stat_buf, const macho_header** mh, const char** pathInCache, long* slide)
-{
- 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 ( stat(path, &statb) == -1 )
- return false;
- stat_buf = &statb;
- }
-#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];
- 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 ( 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
- if ( sSharedCacheIgnoreInodeAndTimeStamp
- || ( ((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 ( ! 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 ( stat(aPath, &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;
- }
- }
-#endif
- }
- }
- return false;
-}
-
-bool inSharedCache(const char* path)
-{
- const macho_header* mhInCache;
- const char* pathInCache;
- long slide;
- return findInSharedCacheImage(path, NULL, &mhInCache, &pathInCache, &slide);
-}
-
-#endif
-
-static ImageLoader* checkandAddImage(ImageLoader* image, const LoadContext& context)
-{
- // now sanity check that this loaded image does not have the same install path as any existing image
- const char* loadedImageInstallPath = image->getInstallPath();
- if ( image->isDylib() && (loadedImageInstallPath != NULL) && (loadedImageInstallPath[0] == '/') ) {
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* anImage = *it;
- const char* installPath = anImage->getInstallPath();
- if ( installPath != NULL) {
- if ( strcmp(loadedImageInstallPath, installPath) == 0 ) {
- //dyld::log("duplicate(%s) => %p\n", installPath, anImage);
- removeImage(image);
- ImageLoader::deleteImage(image);
- return anImage;
- }
- }
- }
- }
-
- // some API's restrict what they can load
- if ( context.mustBeBundle && !image->isBundle() )
- throw "not a bundle";
- 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);
-
- return image;
-}
+ return NULL;
+}
+
+
+
// map in file and instantiate an ImageLoader
-static ImageLoader* loadPhase6(int fd, const struct stat& stat_buf, const char* path, const LoadContext& context)
-{
- //dyld::log("%s(%s)\n", __func__ , path);
+static ImageLoader* loadPhase6(int fd, struct stat& stat_buf, const char* path, const LoadContext& context)
+{
+ //fprintf(stderr, "%s(%s)\n", __func__ , path);
uint64_t fileOffset = 0;
uint64_t fileLength = stat_buf.st_size;
+#if __ppc64__
+ if ( *((uint32_t*)((char*)(&stat_buf)+0x60)) == 0xFEFEFEFE )
+ fileLength = *((uint64_t*)((char*)(&stat_buf)+0x30)); // HACK work around for kernel stat bug rdar://problem/3845883
+#endif
// validate it is a file (not directory)
if ( (stat_buf.st_mode & S_IFMT) != S_IFREG )
throw "not a file";
+ // min file is 4K
+ if ( fileLength < 4096 ) {
+ throw "file to short";
+ }
+
uint8_t firstPage[4096];
- bool shortPage = false;
-
- // 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);
- 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";
+ throw "no matching architecture in fat wrapper";
}
}
// 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 ( isCompatibleMachO(firstPage) ) {
+ char realFilePath[PATH_MAX];
+ if ( gLinkContext.slideAndPackDylibs ) {
+ // when prebinding, we always want to track the real path of images
+ if ( realpath(path, realFilePath) != NULL )
+ path = realFilePath;
+ }
+
+ // instantiate an image
+ ImageLoader* image = new ImageLoaderMachO(path, fd, firstPage, fileOffset, fileLength, stat_buf, gLinkContext);
- // instantiate an image
- ImageLoader* image = ImageLoaderMachO::instantiateFromFile(path, fd, firstPage, fileOffset, fileLength, stat_buf, gLinkContext);
-
- // validate
- return checkandAddImage(image, context);
- }
-
- // try other file formats here...
-
-
- // throw error about what was found
- switch (*(uint32_t*)firstPage) {
- case MH_MAGIC:
- case MH_CIGAM:
- case MH_MAGIC_64:
- case MH_CIGAM_64:
- throw "mach-o, but wrong architecture";
- default:
- throwf("unknown file type, first eight bytes: 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X",
- firstPage[0], firstPage[1], firstPage[2], firstPage[3], firstPage[4], firstPage[5], firstPage[6],firstPage[7]);
- }
-}
-
-
-static ImageLoader* loadPhase5open(const char* path, const LoadContext& context, const struct stat& stat_buf, std::vector<const char*>* exceptions)
-{
- //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
+ // now sanity check that this loaded image does not have the same install path as any existing image
+ const char* loadedImageInstallPath = image->getInstallPath();
+ if ( image->isDylib() && (loadedImageInstallPath != NULL) && (loadedImageInstallPath[0] == '/') ) {
+ for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
+ ImageLoader* anImage = *it;
+ const char* installPath = anImage->getInstallPath();
+ if ( installPath != NULL) {
+ if ( strcmp(loadedImageInstallPath, installPath) == 0 ) {
+ //fprintf(stderr, "duplicate(%s) => %p\n", installPath, anImage);
+ delete image;
+ return anImage;
+ }
+ }
+ }
+ }
+
+ // some API's restrict what they can load
+ if ( context.mustBeBundle && !image->isBundle() )
+ throw "not a bundle";
+ if ( context.mustBeDylib && !image->isDylib() )
+ throw "not a dylib";
+
+ // 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);
+
+ return image;
+ }
+
+ // try other file formats...
+
+ throwf("unknown file type, first eight bytes: 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X",
+ firstPage[0], firstPage[1], firstPage[2], firstPage[3], firstPage[4], firstPage[5], firstPage[6],firstPage[7]);
+}
+
+
+// try to open file
+static ImageLoader* loadPhase5open(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
+{
+ //fprintf(stdout, "%s(%s)\n", __func__, path);
+ ImageLoader* image = NULL;
// open file (automagically closed when this function exits)
FileOpener file(path);
+
+ //fprintf(stderr, "open(%s) => %d\n", path, file.getFileDescriptor() );
+
+ if ( file.getFileDescriptor() == -1 )
+ return NULL;
- // 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;
- }
-
- try {
- return loadPhase6(file.getFileDescriptor(), stat_buf, path, context);
- }
- catch (const char* msg) {
- const char* newMsg = dyld::mkstringf("%s: %s", path, msg);
- exceptions->push_back(newMsg);
- free((void*)msg);
- return NULL;
- }
-}
-
-
-#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 ( 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;
- }
+#if __ppc64__
+ memset(&stat_buf, 254, sizeof(struct stat)); // hack until rdar://problem/3845883 is fixed
+#endif
+ if ( fstat(file.getFileDescriptor(), &stat_buf) == -1)
+ throw "stat error";
// 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
+ // needed to implement 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, &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 ( 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, 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
-
+
+ try {
+ return loadPhase6(file.getFileDescriptor(), stat_buf, path, context);
+ }
+ catch (const char* msg) {
+ char* newMsg = new char[strlen(msg) + strlen(path) + 8];
+ sprintf(newMsg, "%s: %s", path, msg);
+ exceptions->push_back(newMsg);
+ return NULL;
+ }
+}
// 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)
+{
+ //fprintf(stderr, "%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) {
@@ -2376,71 +1260,45 @@
}
}
}
- // 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);
+ }
+
+ //fprintf(stderr, "check(%s) => NULL\n", path);
return NULL;
}
// open or check existing
-static ImageLoader* loadPhase5(const char* path, const char* orgPath, 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;
- }
- }
-
+static ImageLoader* loadPhase5(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
+{
+ //fprintf(stderr, "%s(%s)\n", __func__ , path);
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)
-{
- //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
+static ImageLoader* loadPhase4(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
+{
+ //fprintf(stderr, "%s(%s)\n", __func__ , path);
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,
- 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)
-{
- //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
+static ImageLoader* loadPhase3(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
+{
+ //fprintf(stderr, "%s(%s)\n", __func__ , path);
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 )
- throwf("unsafe use of @executable_path in %s with restricted binary", context.origin);
// handle @executable_path path prefix
const char* executablePath = sExecPath;
char newPath[strlen(executablePath) + strlen(path)];
@@ -2450,7 +1308,7 @@
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;
@@ -2464,15 +1322,12 @@
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) )
- throwf("unsafe use of @loader_path in %s with restricted binary", context.origin);
// handle @loader_path path prefix
char newPath[strlen(context.origin) + strlen(path)];
strcpy(newPath, context.origin);
@@ -2481,7 +1336,7 @@
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;
@@ -2495,60 +1350,22 @@
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;
}
}
- else if ( context.implicitRPath || (strncmp(path, "@rpath/", 7) == 0) ) {
- const char* trailingPath = (strncmp(path, "@rpath/", 7) == 0) ? &path[7] : path;
- // substitute @rpath with all -rpath paths up the load chain
- for(const ImageLoader::RPathChain* rp=context.rpath; rp != NULL; rp=rp->next) {
- if (rp->paths != NULL ) {
- for(std::vector<const char*>::iterator it=rp->paths->begin(); it != rp->paths->end(); ++it) {
- const char* anRPath = *it;
- char newPath[strlen(anRPath) + strlen(trailingPath)+2];
- 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);
- }
- if ( image != NULL )
- return image;
- }
- }
- }
-
- // substitute @rpath with LD_LIBRARY_PATH
- if ( sEnv.LD_LIBRARY_PATH != NULL ) {
- image = loadPhase2(trailingPath, orgPath, context, NULL, sEnv.LD_LIBRARY_PATH, exceptions);
- if ( image != NULL )
- return image;
- }
-
- // if this is the "open" pass, don't try to open @rpath/... as a relative path
- if ( (exceptions != NULL) && (trailingPath != path) )
- return NULL;
- }
- else if (sProcessIsRestricted && (path[0] != '/' )) {
- throwf("unsafe use of relative rpath %s in %s with restricted binary", path, context.origin);
- }
-
- return loadPhase4(path, orgPath, context, exceptions);
+
+ 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)
{
- //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
+ //fprintf(stderr, "%s(%s)\n", __func__ , path);
ImageLoader* image = NULL;
const char* frameworkPartialPath = getFrameworkPartialPath(path);
if ( frameworkPaths != NULL ) {
@@ -2559,8 +1376,8 @@
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);
+ //fprintf(stderr, "dyld: fallback framework path used: %s() -> loadPhase4(\"%s\", ...)\n", __func__, npath);
+ image = loadPhase4(npath, context, exceptions);
if ( image != NULL )
return image;
}
@@ -2574,8 +1391,8 @@
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);
+ //fprintf(stderr, "dyld: fallback library path used: %s() -> loadPhase4(\"%s\", ...)\n", __func__, libpath);
+ image = loadPhase4(libpath, context, exceptions);
if ( image != NULL )
return image;
}
@@ -2584,36 +1401,33 @@
}
// try search overrides and fallbacks
-static ImageLoader* loadPhase1(const char* path, const char* orgPath, const LoadContext& context, std::vector<const char*>* exceptions)
-{
- //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
+static ImageLoader* loadPhase1(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
+{
+ //fprintf(stderr, "%s(%s)\n", __func__ , path);
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);
+ // try fallback paths
+ if ( (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;
}
@@ -2622,24 +1436,24 @@
}
// try root substitutions
-static ImageLoader* loadPhase0(const char* path, const char* orgPath, const LoadContext& context, std::vector<const char*>* exceptions)
-{
- //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
-
+static ImageLoader* loadPhase0(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
+{
+ //fprintf(stderr, "%s(%s)\n", __func__ , path);
+
// 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);
+ return loadPhase1(path, context, exceptions);
}
//
@@ -2658,10 +1472,7 @@
//
ImageLoader* load(const char* path, const LoadContext& context)
{
- CRSetCrashLogMessage2(path);
- const char* orgPath = path;
-
- //dyld::log("%s(%s)\n", __func__ , path);
+ //fprintf(stderr, "%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
if ( context.useSearchPaths && ( gLinkContext.imageSuffix != NULL) ) {
@@ -2670,39 +1481,19 @@
}
// 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);
- 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 __IPHONE_OS_VERSION_MIN_REQUIRED
- // if loaded image is not from cache, but original path is in cache
- // set gSharedCacheOverridden flag to disable some ObjC optimizations
- if ( !gSharedCacheOverridden ) {
- if ( !image->inSharedCache() && 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 ( context.dontLoad )
+ return NULL;
+ else if ( exceptions.size() == 0 )
+ throw "image not found";
else {
const char* msgStart = "no suitable image found. Did find:";
const char* delim = "\n\t";
@@ -2714,533 +1505,65 @@
for (unsigned int i=0; i < exceptions.size(); ++i) {
strcat(fullMsg, delim);
strcat(fullMsg, exceptions[i]);
- free((void*)exceptions[i]);
}
throw (const char*)fullMsg;
}
}
-
-
-#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 SHARED_REGION_READ_ONLY_START 0x7FFF80000000LL
- #define SHARED_REGION_READ_ONLY_END 0x7FFFC0000000LL
- #define SHARED_REGION_WRITABLE_START 0x7FFF70000000LL
- #define SHARED_REGION_WRITABLE_END 0x7FFF80000000LL
- #define SLIDEABLE_CACHE_SUPPORT 1
-#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"
- #define SHARED_REGION_READ_ONLY_START 0x30000000
- #define SHARED_REGION_READ_ONLY_END 0x3E000000
- #define SHARED_REGION_WRITABLE_START 0x3E000000
- #define SHARED_REGION_WRITABLE_END 0x40000000
- #define SLIDEABLE_CACHE_SUPPORT 1
-#elif __ARM_ARCH_7A__
- #define ARCH_NAME "armv7"
- #define ARCH_CACHE_MAGIC "dyld_v1 armv7"
- #define SHARED_REGION_READ_ONLY_START 0x30000000
- #define SHARED_REGION_READ_ONLY_END 0x3E000000
- #define SHARED_REGION_WRITABLE_START 0x3E000000
- #define SHARED_REGION_WRITABLE_END 0x40000000
- #define SLIDEABLE_CACHE_SUPPORT 1
-#elif __ARM_ARCH_7K__
- #define ARCH_NAME "armv7k"
- #define ARCH_CACHE_MAGIC "dyld_v1 armv7k"
- #define SHARED_REGION_READ_ONLY_START 0x30000000
- #define SHARED_REGION_READ_ONLY_END 0x3E000000
- #define SHARED_REGION_WRITABLE_START 0x3E000000
- #define SHARED_REGION_WRITABLE_END 0x40000000
- #define SLIDEABLE_CACHE_SUPPORT 1
-#endif
-
-
-static int __attribute__((noinline)) _shared_region_check_np(uint64_t* start_address)
-{
- if ( gLinkContext.sharedRegionMode == ImageLoader::kUseSharedRegion )
- 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, int slide, void* slideInfo, uint32_t slideInfoSize)
-{
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
- // 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);
- if ( result == -1 )
- dyld::log("dyld: code signature for shared cache failed with errno=%d\n", errno);
- }
-#endif
- if ( gLinkContext.sharedRegionMode == ImageLoader::kUseSharedRegion ) {
- return syscall(438, fd, count, mappings, slide, slideInfo, slideInfoSize);
- }
-
- // 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_all_image_infos.processDetachedFromSharedRegion = true;
-
- // 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];
- 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;
- if ( p->sfm_init_prot & VM_PROT_READ )
- protection |= PROT_READ;
- 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;
- }
- }
-
-#if SLIDEABLE_CACHE_SUPPORT
- // 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;
- }
- }
- }
- }
- }
- }
-#endif // SLIDEABLE_CACHE_SUPPORT
-
- // succesfully mapped shared cache for just this process
- gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
-
- return 0;
-}
-
-
-const void* imMemorySharedCacheHeader()
-{
- return sSharedCache;
-}
-
-int openSharedCacheFile()
-{
- char path[1024];
- strcpy(path, sSharedCacheDir);
- strcat(path, "/");
- strcat(path, DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME);
- return ::open(path, O_RDONLY);
-}
-
-#if SLIDEABLE_CACHE_SUPPORT
-static long pickCacheSlide(uint32_t mappingsCount, shared_file_mapping_np mappings[])
-{
- // get bounds of cache
- uint64_t readOnlyLowAddress = 0;
- uint64_t readOnlyHighAddress = 0;
- uint64_t writableLowAddress = 0;
- uint64_t writableHighAddress = 0;
- for(uint32_t i=0; i < mappingsCount; ++i) {
- if ( mappings[i].sfm_init_prot & VM_PROT_WRITE ) {
- writableLowAddress = mappings[i].sfm_address;
- writableHighAddress = mappings[i].sfm_address + mappings[i].sfm_size;
- }
- else {
- if ( readOnlyLowAddress == 0 ) {
- readOnlyLowAddress = mappings[i].sfm_address;
- readOnlyHighAddress = mappings[i].sfm_address + mappings[i].sfm_size;
- }
- else {
- if ( readOnlyLowAddress < mappings[i].sfm_address ) {
- readOnlyHighAddress = mappings[i].sfm_address + mappings[i].sfm_size;
- }
- else {
- readOnlyLowAddress = mappings[i].sfm_address;
- }
- }
- }
- }
-
- // find read-only slop space
- uint64_t roSpace = SHARED_REGION_READ_ONLY_END - readOnlyHighAddress;
-
- // find writable slop space
- uint64_t rwSpace = SHARED_REGION_WRITABLE_END - writableHighAddress;
-
- // choose new random slide
- long slideSpace = (roSpace > rwSpace) ? rwSpace : roSpace;
- long slide = (arc4random() % slideSpace) & (-4096);
- //dyld::log("roSpace=0x%0llX\n", roSpace);
- //dyld::log("rwSpace=0x%0llX\n", rwSpace);
- //dyld::log("slideSpace=0x%0lX\n", slideSpace);
- //dyld::log("slide=0x%0lX\n", slide);
-
- // update mappings
- for(uint32_t i=0; i < mappingsCount; ++i) {
- mappings[i].sfm_address += slide;
- }
-
- return slide;
-}
-#endif // SLIDEABLE_CACHE_SUPPORT
-
-static void mapSharedCache()
-{
- 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 ( strcmp(sSharedCache->magic, ARCH_CACHE_MAGIC) != 0 ) {
- sSharedCache = NULL;
- if ( gLinkContext.verboseMapping )
- dyld::log("dyld: existing shared cached in memory is not compatible\n");
- }
- // check if cache file is slidable
- dyld_cache_header* header = (dyld_cache_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_all_image_infos.sharedCacheSlide = sSharedCacheSlide;
- //dyld::log("sSharedCacheSlide=0x%08lX, loadedAddress=%p, preferedLoadAddress=%p\n", sSharedCacheSlide, loadedAddress, preferedLoadAddress);
- }
- }
- 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 ( ::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();
- if ( fd != -1 ) {
- uint8_t firstPages[8192];
- if ( ::read(fd, firstPages, 8192) == 8192 ) {
- dyld_cache_header* header = (dyld_cache_header*)firstPages;
- if ( strcmp(header->magic, ARCH_CACHE_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;
- // 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);
- goodCache = false;
- }
- }
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
- // if shared cache is code signed, add a mapping for the code signature
- uint32_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;
- mappings[codeSignatureMappingIndex].sfm_size = (signatureSize+4095) & (-4096);
- mappings[codeSignatureMappingIndex].sfm_file_offset = header->codeSignatureOffset;
- mappings[codeSignatureMappingIndex].sfm_max_prot = VM_PROT_READ;
- mappings[codeSignatureMappingIndex].sfm_init_prot = VM_PROT_READ;
- }
-#endif
- }
-#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 ( 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;
- }
- }
-#endif
- if ( goodCache ) {
- long cacheSlide = 0;
- void* slideInfo = NULL;
- uint32_t slideInfoSize = 0;
- #if SLIDEABLE_CACHE_SUPPORT
- // 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[2].sfm_address + (header->slideInfoOffset - mappings[2].sfm_file_offset));
- slideInfoSize = header->slideInfoSize;
- // add VM_PROT_SLIDE bit to __DATA area of cache
- mappings[1].sfm_max_prot |= VM_PROT_SLIDE;
- mappings[1].sfm_init_prot |= VM_PROT_SLIDE;
- }
- }
- #endif
- 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_all_image_infos.sharedCacheSlide = cacheSlide;
- //dyld::log("sSharedCache=%p sSharedCacheSlide=0x%08lX\n", sSharedCache, sSharedCacheSlide);
- }
- else {
- if ( gLinkContext.verboseMapping )
- dyld::log("dyld: shared cached file could not be mapped\n");
- }
- }
- }
- else {
- if ( gLinkContext.verboseMapping )
- dyld::log("dyld: shared cached file is invalid\n");
- }
- }
- else {
- if ( gLinkContext.verboseMapping )
- dyld::log("dyld: shared cached file cannot be read\n");
- }
- close(fd);
- }
- else {
- if ( gLinkContext.verboseMapping )
- dyld::log("dyld: shared cached file cannot be opened\n");
- }
- }
-
- // remember if dyld loaded at same address as when cache built
- if ( sSharedCache != NULL ) {
- gLinkContext.dyldLoadedAtSameAddressNeededBySharedCache = ((uintptr_t)(sSharedCache->dyldBaseAddress) == (uintptr_t)&_mh_dylinker_header);
- }
-
- // 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);
- 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;
- if ( gLinkContext.verboseMapping ) {
- if ( gLinkContext.sharedRegionMode == ImageLoader::kUseSharedRegion )
- dyld::log("dyld: Mapping shared cache from %s/" DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME "\n", sSharedCacheDir);
- else if ( gLinkContext.sharedRegionMode == ImageLoader::kUsePrivateSharedRegion )
- dyld::log("dyld: Mapping private shared cache from %s/" DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME "\n", sSharedCacheDir);
- }
- const dyld_cache_mapping_info* 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;
- 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);
- }
- #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' : '.' );
- }
- }
- }
- #endif
- }
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
- if ( gLinkContext.verboseMapping ) {
- // list the code blob
- dyld_cache_header* header = (dyld_cache_header*)sSharedCache;
- uint32_t signatureSize = header->codeSignatureSize;
- // zero size in header means signature runs to end-of-file
- if ( signatureSize == 0 ) {
- struct stat stat_buf;
- if ( ::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);
- }
- }
- // check for file that enables dyld shared cache dylibs to be overridden
- struct stat enableStatBuf;
- sDylibsOverrideCache = ( ::stat(IPHONE_DYLD_SHARED_CACHE_DIR "enable-dylibs-to-override-cache", &enableStatBuf) == 0 );
-#endif
- }
-}
-#endif // #if DYLD_SHARED_CACHE_SUPPORT
// 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());
struct stat stat_buf;
+#if __ppc64__
+ memset(&stat_buf, 254, sizeof(struct stat)); // hack until rdar://problem/3845883 is fixed
+#endif
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";
}
ImageLoader* loadFromMemory(const uint8_t* mem, uint64_t len, const char* moduleName)
{
- // if fat wrapper, find usable sub-file
- const fat_header* memStartAsFat = (fat_header*)mem;
- uint64_t fileOffset = 0;
- uint64_t fileLength = len;
- if ( memStartAsFat->magic == OSSwapBigToHostInt32(FAT_MAGIC) ) {
- if ( fatFindBest(memStartAsFat, &fileOffset, &fileLength) ) {
- mem = &mem[fileOffset];
- len = fileLength;
- }
- else {
- throw "no matching architecture in universal wrapper";
- }
- }
-
- // try each loader
- if ( isCompatibleMachO(mem, moduleName) ) {
- ImageLoader* image = ImageLoaderMachO::instantiateFromMemory(moduleName, (macho_header*)mem, len, gLinkContext);
+ // try mach-o each loader
+ 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);
return image;
}
- // try other file formats here...
-
- // throw error about what was found
- switch (*(uint32_t*)mem) {
- case MH_MAGIC:
- case MH_CIGAM:
- case MH_MAGIC_64:
- case MH_CIGAM_64:
- throw "mach-o, but wrong architecture";
- default:
- throwf("unknown file type, first eight bytes: 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X",
- mem[0], mem[1], mem[2], mem[3], mem[4], mem[5], mem[6],mem[7]);
- }
+ // try other file formats...
+
+ throwf("unknown file type, first eight bytes: 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X 0x%02X",
+ mem[0], mem[1], mem[2], mem[3], mem[4], mem[5], mem[6],mem[7]);
}
@@ -3249,12 +1572,17 @@
// now add to list to get notified when any more images are added
sAddImageCallbacks.push_back(func);
- // call callback with all existing images
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* image = *it;
- if ( image->getState() >= dyld_image_state_bound && image->getState() < dyld_image_state_terminated )
- (*func)(image->machHeader(), image->getSlide());
- }
+ // call callback with all existing images, starting at roots
+ const int rootCount = sImageRoots.size();
+ for(int i=0; i < rootCount; ++i) {
+ ImageLoader* image = sImageRoots[i];
+ image->runNotification(gLinkContext, sAddImageCallbacks.size());
+ }
+
+// for (std::vector<ImageLoader*>::iterator it=sImageRoots.begin(); it != sImageRoots.end(); it++) {
+// ImageLoader* image = *it;
+// image->runNotification(gLinkContext, sAddImageCallbacks.size());
+// }
}
void registerRemoveCallback(ImageCallback func)
@@ -3270,7 +1598,8 @@
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()
@@ -3278,25 +1607,21 @@
return error_string;
}
-
-void halt(const char* message)
-{
- dyld::log("dyld: %s\n", message);
+void halt(const char* message)
+{
+ fprintf(stderr, "dyld: %s\n", message);
setErrorMessage(message);
- uintptr_t terminationFlags = 0;
- if ( !gLinkContext.startedInitializingMainExecutable )
- terminationFlags = 1;
- setAlImageInfosHalt(error_string, terminationFlags);
- dyld_fatal_error(error_string);
-}
-
-static void setErrorStrings(unsigned errorCode, const char* errorClientOfDylibPath,
- const char* errorTargetDylibPath, const char* errorSymbol)
-{
- dyld_all_image_infos.errorKind = errorCode;
- dyld_all_image_infos.errorClientOfDylibPath = errorClientOfDylibPath;
- dyld_all_image_infos.errorTargetDylibPath = errorTargetDylibPath;
- dyld_all_image_infos.errorSymbol = errorSymbol;
+ strncpy(error_string, message, sizeof(error_string)-1);
+ error_string[sizeof(error_string)-1] = '\0';
+
+#if __ppc__ || __ppc64__
+ __asm__ ("trap");
+#elif __i386__
+ __asm__ ("int3");
+#else
+ #error unknown architecture
+#endif
+ abort(); // needed to suppress warning that noreturn function returns
}
@@ -3305,70 +1630,37 @@
uintptr_t result = 0;
// acquire read-lock on dyld's data structures
#if 0 // rdar://problem/3811777 turn off locking until deadlock is resolved
- if ( gLibSystemHelpers != NULL )
- (*gLibSystemHelpers->lockForReading)();
+ if ( gThreadHelpers != NULL )
+ (*gThreadHelpers->lockForReading)();
#endif
// lookup and bind lazy pointer and get target address
try {
- ImageLoader* target;
- #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);
- else
- target = dyld::findImageByMachHeader(mh);
- #else
// note, target should always be mach-o, because only mach-o lazy handler wired up to this
- target = dyld::findImageByMachHeader(mh);
- #endif
+ ImageLoader* target = dyld::findImageByMachHeader(mh);
if ( target == NULL )
- throwf("image not found for lazy pointer at %p", lazyPointer);
+ throw "image not found for lazy pointer";
result = target->doBindLazySymbol(lazyPointer, gLinkContext);
}
catch (const char* message) {
- dyld::log("dyld: lazy symbol binding failed: %s\n", message);
+ fprintf(stderr, "dyld: lazy symbol binding failed: %s\n", message);
halt(message);
}
// release read-lock on dyld's data structures
#if 0
- if ( gLibSystemHelpers != NULL )
- (*gLibSystemHelpers->unlockForReading)();
+ if ( gThreadHelpers != NULL )
+ (*gThreadHelpers->unlockForReading)();
#endif
// return target address to glue which jumps to it with real parameters restored
return result;
}
-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(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)
{
@@ -3382,24 +1674,53 @@
}
}
-static bool findExportedSymbol(const char* name, bool onlyInCoalesced, const ImageLoader::Symbol** sym, const ImageLoader** image)
-{
+static bool findExportedSymbol(const char* name, bool onlyInCoalesced, const ImageLoader::Symbol** sym, 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
+ *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() ) {
+ //fprintf(stderr, "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;
+ ImageLoader* firstWeakImage = NULL;
const ImageLoader::Symbol* firstWeakSym = NULL;
const unsigned int imageCount = sAllImages.size();
- for(unsigned int i=0; i < imageCount; ++i) {
+ 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
- if ( sInsertedDylibCount > 0 ) {
- if ( i < sInsertedDylibCount )
- anImage = sAllImages[i+1];
- else if ( i == sInsertedDylibCount )
- 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 ) {
@@ -3425,18 +1746,18 @@
return false;
}
-bool flatFindExportedSymbol(const char* name, const ImageLoader::Symbol** sym, const ImageLoader** image)
+bool flatFindExportedSymbol(const char* name, const ImageLoader::Symbol** sym, ImageLoader** image)
{
return findExportedSymbol(name, false, sym, image);
}
-bool findCoalescedExportedSymbol(const char* name, const ImageLoader::Symbol** sym, const ImageLoader** image)
+bool findCoalescedExportedSymbol(const char* name, const ImageLoader::Symbol** sym, ImageLoader** image)
{
return findExportedSymbol(name, true, sym, image);
}
-bool flatFindExportedSymbolWithHint(const char* name, const char* librarySubstring, const ImageLoader::Symbol** sym, const ImageLoader** image)
+bool flatFindExportedSymbolWithHint(const char* name, const char* librarySubstring, const ImageLoader::Symbol** sym, ImageLoader** image)
{
// search all images in order
const unsigned int imageCount = sAllImages.size();
@@ -3444,7 +1765,7 @@
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;
}
@@ -3453,444 +1774,80 @@
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)
-{
- ImageLoader::MappedRegion* end = regions;
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- (*it)->getMappedRegions(end);
- }
- return end;
-}
-
-void registerImageStateSingleChangeHandler(dyld_image_states state, dyld_image_state_change_handler handler)
-{
- // mark the image that the handler is in as never-unload because dyld has a reference into it
- ImageLoader* handlerImage = findImageContainingAddress((void*)handler);
- if ( handlerImage != NULL )
- handlerImage->setNeverUnload();
-
- // 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);
-
- // 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.imageFileModDate = image->lastModified();
- // should only call handler if state == image->state
- if ( image->getState() == state )
- (*handler)(state, 1, &info);
- // ignore returned string, too late to do anything
- }
- }
-}
-
-void registerImageStateBatchChangeHandler(dyld_image_states state, dyld_image_state_change_handler handler)
-{
- // mark the image that the handler is in as never-unload because dyld has a reference into it
- ImageLoader* handlerImage = findImageContainingAddress((void*)handler);
- if ( handlerImage != NULL )
- handlerImage->setNeverUnload();
-
- // add to list of handlers
- std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(state, sBatchHandlers);
- if ( handlers != NULL ) {
- // insert at front, so that gdb handler is always last
- handlers->insert(handlers->begin(), handler);
-
- // call callback with all existing images
- try {
- notifyBatchPartial(state, true, handler);
- }
- catch (const char* msg) {
- // ignore request to abort during registration
- }
- }
-}
-
-static ImageLoader* libraryLocator(const char* libraryName, bool search, const char* origin, const ImageLoader::RPathChain* rpaths)
+static void getMappedRegions(ImageLoader::RegionsVector& regions)
+{
+ const unsigned int imageCount = sAllImages.size();
+ for(unsigned int i=0; i < imageCount; ++i){
+ ImageLoader* anImage = sAllImages[i];
+ anImage->addMappedRegions(regions);
+ }
+}
+
+
+static ImageLoader* libraryLocator(const char* libraryName, bool search, const char* origin, const char* rpath[])
{
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.matchByInstallName = false;
context.origin = origin;
- context.rpath = rpaths;
+ context.rpath = rpath;
return load(libraryName, context);
}
-static const char* basename(const char* path)
-{
- const char* last = path;
- for (const char* s = path; *s != '\0'; s++) {
- if (*s == '/')
- last = s+1;
- }
- return last;
-}
-
-static void setContext(const macho_header* mainExecutableMH, int argc, const char* argv[], const char* envp[], const char* apple[])
+
+static void setContext(int argc, const char* argv[], const char* envp[], const char* apple[])
{
gLinkContext.loadLibrary = &libraryLocator;
+ gLinkContext.imageNotification = &imageNotification;
gLinkContext.terminationRecorder = &terminationRecorder;
gLinkContext.flatExportFinder = &flatFindExportedSymbol;
gLinkContext.coalescedExportFinder = &findCoalescedExportedSymbol;
- gLinkContext.getCoalescedImages = &getCoalescedImages;
gLinkContext.undefinedHandler = &undefinedHandler;
+ gLinkContext.addImageNeedingNotification = &addImageNeedingNotification;
+ gLinkContext.notifyAdding = ¬ifyAdding;
gLinkContext.getAllMappedRegions = &getMappedRegions;
gLinkContext.bindingHandler = NULL;
- gLinkContext.notifySingle = ¬ifySingle;
- gLinkContext.notifyBatch = ¬ifyBatch;
- gLinkContext.removeImage = &removeImage;
- gLinkContext.registerDOFs = ®isterDOFs;
- gLinkContext.clearAllDepths = &clearAllDepths;
- gLinkContext.printAllDepths = &printAllDepths;
- gLinkContext.imageCount = &imageCount;
- 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.bindingOptions = ImageLoader::kBindingNone;
+ gLinkContext.mainExecutable = sMainExecutable;
gLinkContext.argc = argc;
gLinkContext.argv = argv;
gLinkContext.envp = envp;
gLinkContext.apple = apple;
- gLinkContext.progname = (argv[0] != NULL) ? basename(argv[0]) : "";
- gLinkContext.programVars.mh = mainExecutableMH;
- gLinkContext.programVars.NXArgcPtr = &gLinkContext.argc;
- gLinkContext.programVars.NXArgvPtr = &gLinkContext.argv;
- gLinkContext.programVars.environPtr = &gLinkContext.envp;
- gLinkContext.programVars.__prognamePtr=&gLinkContext.progname;
- gLinkContext.mainExecutable = NULL;
- gLinkContext.imageSuffix = NULL;
- gLinkContext.prebindUsage = ImageLoader::kUseAllPrebinding;
- gLinkContext.sharedRegionMode = ImageLoader::kUseSharedRegion;
-}
-
-
-#if __LP64__
- #define LC_SEGMENT_COMMAND LC_SEGMENT_64
- #define macho_segment_command segment_command_64
- #define macho_section section_64
-#else
- #define LC_SEGMENT_COMMAND LC_SEGMENT
- #define macho_segment_command segment_command
- #define macho_section section
-#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);
- }
-
- return false;
-}
-
-#if SUPPORT_VERSIONED_PATHS
-//
-// 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)
-{
- // open file (automagically closed when this function exits)
- FileOpener file(dylibPath);
-
- if ( file.getFileDescriptor() == -1 )
- return false;
-
- uint8_t firstPage[4096];
- 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;
- }
- }
-
- // check mach-o header
- const mach_header* mh = (mach_header*)firstPage;
- 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
-
-#if 0
-static void printAllImages()
-{
- dyld::log("printAllImages()\n");
- 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, refcount=%d, name=%s\n", imageState, image->referenceCount(), image->getShortName());
- image->printReferenceCounts();
- }
-}
-#endif
-
-void link(ImageLoader* image, bool forceLazysBound, const ImageLoader::RPathChain& loaderRPaths)
+}
+
+
+
+void link(ImageLoader* image, ImageLoader::BindingLaziness bindness, ImageLoader::InitializerRunning runInitializers)
{
// add to list of known images. This did not happen at creation time for bundles
- if ( image->isBundle() && !image->isLinked() )
+ if ( image->isBundle() )
addImage(image);
// we detect root images as those not linked in yet
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, loaderRPaths);
- }
- catch (const char* msg) {
- garbageCollectImages();
- throw;
- }
-}
-
-
-void runInitializers(ImageLoader* image)
-{
- // do bottom up initialization
- ImageLoader::InitializerTimingList initializerTimes[sAllImages.size()];
- initializerTimes[0].count = 0;
- image->runInitializers(gLinkContext, initializerTimes[0]);
-}
-
-void garbageCollectImages()
-{
- // 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;
- if ( (image->referenceCount() == 0) && !image->neverUnload() && !image->isBeingRemoved() ) {
- if ( image->isReferencedUpward() ) {
- // temp hack for rdar://problem/10973109
- // if an image is upwardly referenced, we really need to scan all images
- // to see if any are still using it.
- continue;
- }
- try {
- //dyld::log("garbageCollectImages: deleting %p %s\n", image, image->getPath());
- image->setBeingRemoved();
- removeImage(image);
- ImageLoader::deleteImage(image);
- }
- catch (const char* msg) {
- dyld::warn("problem deleting image: %s\n", msg);
- }
- mightBeUnreferencedImages = true;
- break;
- }
- }
- }
- //printAllImages();
-}
-
-
-static void preflight_finally(ImageLoader* image)
-{
- if ( image->isBundle() ) {
- removeImageFromAllImages(image->machHeader());
- ImageLoader::deleteImage(image);
- }
- sBundleBeingLoaded = NULL;
- dyld::garbageCollectImages();
-}
-
-
-void preflight(ImageLoader* image, const ImageLoader::RPathChain& loaderRPaths)
-{
- try {
- if ( image->isBundle() )
- sBundleBeingLoaded = image; // hack
- image->link(gLinkContext, false, true, loaderRPaths);
- }
- catch (const char* msg) {
- preflight_finally(image);
- throw;
- }
- preflight_finally(image);
-}
-
-static void loadInsertedDylib(const char* path)
-{
- ImageLoader* image = NULL;
- 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.origin = NULL; // can't use @loader_path with DYLD_INSERT_LIBRARIES
- context.rpath = NULL;
- image = load(path, context);
- image->setNeverUnload();
- }
- catch (...) {
- halt(dyld::mkstringf("could not load inserted library: %s\n", path));
- }
-}
-
-static bool processRestricted(const macho_header* mainExecutableMH)
-{
- // all processes with setuid or setgid bit set are restricted
- if ( issetugid() ) {
- sRestrictedReason = restrictedBySetGUid;
- return true;
- }
-
- const uid_t euid = geteuid();
- if ( (euid != 0) && hasRestrictedSegment(mainExecutableMH) ) {
- // existence of __RESTRICT/__restrict section make process restricted
- sRestrictedReason = restrictedBySegment;
- return true;
- }
-
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- // ask kernel if code signature of program makes it restricted
- uint32_t flags;
- if ( syscall(SYS_csops /* 169 */,
- 0 /* asking about myself */,
- CS_OPS_STATUS,
- &flags,
- sizeof(flags)) != -1) {
- if (flags & CS_RESTRICT) {
- sRestrictedReason = restrictedByEntitlements;
- return true;
- }
- }
+ image->link(gLinkContext, bindness, runInitializers, sAddImageCallbacks.size());
+
+#if OLD_GDB_DYLD_INTERFACE
+ // notify gdb that loaded libraries have changed
+ gdb_dyld_state_changed();
#endif
- return false;
-}
-
-
-
-
-// <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);
- }
-}
-
+}
//
@@ -3900,177 +1857,101 @@
// 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)
+_main(const struct mach_header* mainExecutableMH, int argc, const char* argv[], const char* envp[], const char* apple[])
{
- uintptr_t result = 0;
- CRSetCrashLogMessage("dyld: launch started");
-#ifdef ALTERNATIVE_LOGFILE
- sLogfile = open(ALTERNATIVE_LOGFILE, O_WRONLY | O_CREAT | O_APPEND);
- if ( sLogfile == -1 ) {
- sLogfile = STDERR_FILENO;
- dyld::log("error opening alternate log file %s, errno = %d\n", ALTERNATIVE_LOGFILE, errno);
- }
-#endif
-
-#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
- setContext(mainExecutableMH, argc, argv, envp, apple);
-
// Pickup the pointer to the exec path.
- sExecPath = apple[0];
- bool ignoreEnvironmentVariables = false;
- if ( sExecPath[0] != '/' ) {
+ const char* executable = apple[0];
+ if ( executable[0] == '/' ) {
+ // have full path, use it
+ sExecPath = executable;
+ }
+ else {
// have relative path, use cwd to make absolute
char cwdbuff[MAXPATHLEN];
if ( getcwd(cwdbuff, MAXPATHLEN) != NULL ) {
// maybe use static buffer to avoid calling malloc so early...
- char* s = new char[strlen(cwdbuff) + strlen(sExecPath) + 2];
+ char* s = new char[strlen(cwdbuff) + strlen(executable) + 2];
strcpy(s, cwdbuff);
strcat(s, "/");
- strcat(s, sExecPath);
+ strcat(s, executable);
sExecPath = s;
}
}
+ uintptr_t result = 0;
sMainExecutableMachHeader = mainExecutableMH;
- sProcessIsRestricted = processRestricted(mainExecutableMH);
- if ( sProcessIsRestricted ) {
-#if SUPPORT_LC_DYLD_ENVIRONMENT
- checkLoadCommandEnvironmentVariables();
-#if SUPPORT_VERSIONED_PATHS
- checkVersionedPaths();
-#endif
-#endif
- pruneEnvironmentVariables(envp, &apple);
- // set again because envp and apple may have changed or moved
- setContext(mainExecutableMH, argc, argv, envp, apple);
- }
- else
- checkEnvironmentVariables(envp, ignoreEnvironmentVariables);
+ checkEnvironmentVariables(envp);
if ( sEnv.DYLD_PRINT_OPTS )
printOptions(argv);
if ( sEnv.DYLD_PRINT_ENV )
printEnvironmentVariables(envp);
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);
- 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_all_image_infos.systemOrderFlag);
-#endif
-
+ setContext(argc, argv, envp, apple);
+ ImageLoader::BindingLaziness bindness = sEnv.DYLD_BIND_AT_LAUNCH ? ImageLoader::kLazyAndNonLazy : ImageLoader::kNonLazyOnly;
+
+ // load any inserted libraries before loading the main executable so that they are first in flat namespace
+ int insertLibrariesCount = 0;
+ if ( sEnv.DYLD_INSERT_LIBRARIES != NULL ) {
+ for (const char* const* lib = sEnv.DYLD_INSERT_LIBRARIES; *lib != NULL; ++lib) {
+ insertLibrariesCount++;
+ }
+ }
+ ImageLoader* insertedImages[insertLibrariesCount];
+ if ( insertLibrariesCount > 0 ) {
+ for (int i=0; i < insertLibrariesCount; ++i) {
+ try {
+ LoadContext context;
+ context.useSearchPaths = false;
+ context.useLdLibraryPath = false;
+ context.dontLoad = false;
+ context.mustBeBundle = false;
+ context.mustBeDylib = true;
+ context.matchByInstallName = false;
+ context.origin = NULL; // can't use @loader_path with DYLD_INSERT_LIBRARIES
+ context.rpath = NULL;
+ insertedImages[i] = load(sEnv.DYLD_INSERT_LIBRARIES[i], context);
+ }
+ catch (...) {
+ char buf[strlen(sEnv.DYLD_INSERT_LIBRARIES[i])+50];
+ sprintf(buf, "could not load inserted library: %s\n", sEnv.DYLD_INSERT_LIBRARIES[i]);
+ insertedImages[i] = NULL;
+ halt(buf);
+ }
+ }
+ }
+
+ // load and link main executable
try {
- // add dyld itself to UUID list
- addDyldImageToUUIDList();
- CRSetCrashLogMessage("dyld: launch, loading dependent libraries");
- // instantiate ImageLoader for main executable
- sMainExecutable = instantiateFromLoadedImage(mainExecutableMH, mainExecutableSlide, sExecPath);
- sMainExecutable->setNeverUnload();
+ sMainExecutable = instantiateFromLoadedImage(mainExecutableMH, sExecPath);
gLinkContext.mainExecutable = sMainExecutable;
- gLinkContext.processIsRestricted = sProcessIsRestricted;
- // load shared cache
- checkSharedRegionDisable();
- #if DYLD_SHARED_CACHE_SUPPORT
- if ( gLinkContext.sharedRegionMode != ImageLoader::kDontUseSharedRegion )
- mapSharedCache();
- #endif
- // load any inserted libraries
- if ( sEnv.DYLD_INSERT_LIBRARIES != NULL ) {
- for (const char* const* lib = sEnv.DYLD_INSERT_LIBRARIES; *lib != NULL; ++lib)
- loadInsertedDylib(*lib);
- }
- // record count of inserted libraries so that a flat search will look at
- // inserted libraries, then main, then others.
- sInsertedDylibCount = sAllImages.size()-1;
-
- // link main executable
- gLinkContext.linkingMainExecutable = true;
- link(sMainExecutable, sEnv.DYLD_BIND_AT_LAUNCH, ImageLoader::RPathChain(NULL, NULL));
- gLinkContext.linkingMainExecutable = false;
if ( sMainExecutable->forceFlat() ) {
gLinkContext.bindFlat = true;
gLinkContext.prebindUsage = ImageLoader::kUseNoPrebinding;
}
-
- // link any inserted libraries
- // do this after linking main executable so that any dylibs pulled in by inserted
- // dylibs (e.g. libSystem) will not be in front of dylibs the program uses
- if ( sInsertedDylibCount > 0 ) {
- for(unsigned int i=0; i < sInsertedDylibCount; ++i) {
- ImageLoader* image = sAllImages[i+1];
- link(image, sEnv.DYLD_BIND_AT_LAUNCH, ImageLoader::RPathChain(NULL, NULL));
- // only INSERTED libraries can interpose
- image->registerInterposing();
- }
- }
-
- 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 = NULL;
- }
+ link(sMainExecutable, bindness, ImageLoader::kDontRunInitializers);
+ result = (uintptr_t)sMainExecutable->getMain();
}
catch(const char* message) {
- syncAllImages();
halt(message);
}
catch(...) {
- dyld::log("dyld: launch failed\n");
- }
-
-#ifdef ALTERNATIVE_LOGFILE
- // only use alternate log during launch, otherwise file is open forever
- if ( sLogfile != STDERR_FILENO ) {
- close(sLogfile);
- sLogfile = STDERR_FILENO;
- }
-#endif
- CRSetCrashLogMessage(NULL);
+ fprintf(stderr, "dyld: launch failed\n");
+ }
+
+ // Link in any inserted libraries.
+ // Do this after link main executable so any extra libraries pulled in by inserted libraries are at end of flat namespace
+ if ( insertLibrariesCount > 0 ) {
+ for (int i=0; i < insertLibrariesCount; ++i) {
+ try {
+ if ( insertedImages[i] != NULL )
+ link(insertedImages[i], bindness, ImageLoader::kDontRunInitializers);
+ }
+ catch (const char* message) {
+ char buf[strlen(sEnv.DYLD_INSERT_LIBRARIES[i])+50+strlen(message)];
+ sprintf(buf, "could not link inserted library: %s\n%s\n", sEnv.DYLD_INSERT_LIBRARIES[i], message);
+ halt(buf);
+ }
+ }
+ }
return result;
}