Loading...
--- dyld/dyld-46.16/src/dyld.cpp
+++ dyld/dyld-96.2/src/dyld.cpp
@@ -1,6 +1,6 @@
/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
*
- * Copyright (c) 2004-2006 Apple Computer, Inc. All rights reserved.
+ * Copyright (c) 2004-2007 Apple Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
@@ -25,6 +25,7 @@
#include <stdint.h>
#include <string.h>
#include <unistd.h>
+#include <errno.h>
#include <fcntl.h>
#include <sys/param.h>
#include <mach/mach_time.h> // mach_absolute_time()
@@ -32,35 +33,60 @@
#include <sys/stat.h>
#include <mach-o/fat.h>
#include <mach-o/loader.h>
+#include <mach-o/ldsyms.h>
#include <libkern/OSByteOrder.h>
#include <mach/mach.h>
#include <sys/sysctl.h>
+#include <sys/mman.h>
+#include <sys/dtrace.h>
#include <vector>
+#include <algorithm>
#include "mach-o/dyld_gdb.h"
#include "dyld.h"
#include "ImageLoader.h"
#include "ImageLoaderMachO.h"
-#include "dyldLibSystemThreadHelpers.h"
+#include "dyldLibSystemInterface.h"
+#include "dyld_cache_format.h"
+
+// from _simple.h in libc
+typedef struct _SIMPLE* _SIMPLE_STRING;
+extern "C" void _simple_vdprintf(int __fd, const char *__fmt, va_list __ap);
+extern "C" void _simple_dprintf(int __fd, const char *__fmt, ...);
+extern "C" _SIMPLE_STRING _simple_salloc(void);
+extern "C" int _simple_vsprintf(_SIMPLE_STRING __b, const char *__fmt, va_list __ap);
+extern "C" void _simple_sfree(_SIMPLE_STRING __b);
+extern "C" char * _simple_string(_SIMPLE_STRING __b);
+
+
+
+// 32-bit ppc is only architecture that uses cpu-sub-types
+#define CPU_SUBTYPES_SUPPORTED __ppc__
+
+
+#define OLD_GDB_DYLD_INTERFACE __ppc__ || __i386__
#define CPU_TYPE_MASK 0x00FFFFFF /* complement of CPU_ARCH_MASK */
/* implemented in dyld_gdb.cpp */
-void addImagesToAllImages(uint32_t infoCount, const dyld_image_info info[]);
-void removeImageFromAllImages(const mach_header* mh);
+extern void addImagesToAllImages(uint32_t infoCount, const dyld_image_info info[]);
+extern 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);
+extern void addImageForgdb(const mach_header* mh, uintptr_t slide, const char* physicalPath, const char* logicalPath);
+extern void removeImageForgdb(const struct mach_header* mh);
#endif
// magic so CrashReporter logs message
extern "C" {
char error_string[1024];
}
+// implemented in dyldStartup.s for CrashReporter
+extern "C" void dyld_fatal_error(const char* errString) __attribute__((noreturn));
+
//
@@ -93,6 +119,7 @@
bool DYLD_PRINT_STATISTICS;
bool DYLD_PRINT_OPTS;
bool DYLD_PRINT_ENV;
+ bool DYLD_DISABLE_DOFS;
// DYLD_IMAGE_SUFFIX ==> gLinkContext.imageSuffix
// DYLD_PRINT_OPTS ==> gLinkContext.verboseOpts
// DYLD_PRINT_ENV ==> gLinkContext.verboseEnv
@@ -101,14 +128,17 @@
// DYLD_PRINT_SEGMENTS ==> gLinkContext.verboseMapping
// DYLD_PRINT_BINDINGS ==> gLinkContext.verboseBind
// 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
};
+
+typedef std::vector<dyld_image_state_change_handler> StateHandlers;
+struct RegisteredDOF { const mach_header* mh; int registrationID; };
// all global state
static const char* sExecPath = NULL;
@@ -116,13 +146,19 @@
static cpu_type_t sHostCPU;
static cpu_subtype_t sHostCPUsubtype;
static ImageLoader* sMainExecutable = NULL;
-static bool sAllImagesMightContainUnlinkedImages; // necessary until will support dylib unloading
+static bool sMainExecutableIsSetuid = false;
+static unsigned int sInsertedDylibCount = 0;
static std::vector<ImageLoader*> sAllImages;
static std::vector<ImageLoader*> sImageRoots;
static std::vector<ImageLoader*> sImageFilesNeedingTermination;
+static std::vector<RegisteredDOF> sImageFilesNeedingDOFUnregistration;
+#if IMAGE_NOTIFY_SUPPORT
static std::vector<ImageLoader*> sImagesToNotifyAboutOtherImages;
+#endif
static std::vector<ImageCallback> sAddImageCallbacks;
static std::vector<ImageCallback> sRemoveImageCallbacks;
+static 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 };
@@ -130,10 +166,67 @@
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;
+bool gSharedCacheNotFound = false;
+bool gSharedCacheNeedsUpdating = false;
+bool gSharedCacheDontNotify = false;
+#endif
ImageLoader::LinkContext gLinkContext;
bool gLogAPIs = false;
-const struct ThreadingHelpers* gThreadHelpers = NULL;
-
+const struct LibSystemHelpers* gLibSystemHelpers = NULL;
+#if SUPPORT_OLD_CRT_INITIALIZATION
+bool gRunInitializersOldWay = false;
+#endif
+#if __i386__
+static uint32_t sImportSegmentsStart = 0;
+static uint32_t sImportSegmentsSize = 0;
+#endif
+
+
+
+const char* mkstringf(const char* format, ...)
+{
+ va_list list;
+ va_start(list, format);
+ _SIMPLE_STRING buf = _simple_salloc();
+ _simple_vsprintf(buf, format, list);
+ va_end(list);
+ const char* t = strdup(_simple_string(buf));
+ _simple_sfree(buf);
+ return t;
+}
+
+
+void throwf(const char* format, ...)
+{
+ va_list list;
+ va_start(list, format);
+ _SIMPLE_STRING buf = _simple_salloc();
+ _simple_vsprintf(buf, format, list);
+ va_end(list);
+ const char* t = strdup(_simple_string(buf));
+ _simple_sfree(buf);
+ throw t;
+}
+
+void log(const char* format, ...)
+{
+ va_list list;
+ va_start(list, format);
+ _simple_vdprintf(STDERR_FILENO, format, list);
+ va_end(list);
+}
+
+void warn(const char* format, ...)
+{
+ _simple_dprintf(STDERR_FILENO, "dyld: warning, ");
+ va_list list;
+ va_start(list, format);
+ _simple_vdprintf(STDERR_FILENO, format, list);
+ va_end(list);
+}
// utility class to assure files are closed when an exception is thrown
@@ -147,60 +240,254 @@
};
FileOpener::FileOpener(const char* path)
+ : fd(-1)
{
fd = open(path, O_RDONLY, 0);
}
FileOpener::~FileOpener()
{
- 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)
+ if ( fd != -1 )
+ close(fd);
+}
+
+
+// forward declaration
+#if __ppc__ || __i386__
+bool isRosetta();
+#endif
+
+
+static void registerDOFs(const std::vector<ImageLoader::DOFInfo>& dofs)
+{
+#if __ppc__
+ // can't dtrace a program running emulated under rosetta rdar://problem/5179640
+ if ( isRosetta() )
+ return;
+#endif
+ const unsigned int dofSectionCount = dofs.size();
+ if ( !sEnv.DYLD_DISABLE_DOFS && (dofSectionCount != 0) ) {
+ int fd = open("/dev/" DTRACEMNR_HELPER, O_RDWR);
+ if ( fd < 0 ) {
+ //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* notifyGDB(enum dyld_image_states state, uint32_t infoCount, const struct dyld_image_info info[])
+{
+ addImagesToAllImages(infoCount, info);
+ return NULL;
+}
+
+#if IMAGE_NOTIFY_SUPPORT
+// notify objc about these new images
+static void notifyAdding(const ImageLoader* const * images, unsigned int count)
{
// build array
- unsigned int len = images.size();
- if ( len != 0 ) {
- dyld_image_info infos[len];
- for (unsigned int i=0; i < len; ++i) {
+ if ( count != 0 ) {
+ dyld_image_info infos[count];
+ for (unsigned int i=0; i < count; ++i) {
dyld_image_info* p = &infos[i];
- ImageLoader* image = images[i];
+ const 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());
+ //dyld::log("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);
- }
- }
-}
-
-
+ (*it)->doNotification(dyld_image_adding, count, infos);
+ }
+ }
+}
+#endif
+
+static StateHandlers* stateToHandlers(dyld_image_states state, StateHandlers handlersArray[8])
+{
+ switch ( state ) {
+ case dyld_image_state_mapped:
+ return &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 struct mach_header* mh, const char* path, time_t modDate)
+{
+ std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(state, sSingleHandlers);
+ if ( handlers != NULL ) {
+ dyld_image_info info;
+ info.imageLoadAddress = mh;
+ info.imageFilePath = path;
+ info.imageFileModDate = modDate;
+ for (std::vector<dyld_image_state_change_handler>::iterator it = handlers->begin(); it != handlers->end(); ++it) {
+ const char* result = (*it)(state, 1, &info);
+ if ( (result != NULL) && (state == dyld_image_state_mapped) ) {
+ //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;
+ }
+ }
+ }
+}
+
+
+
+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
+ 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;
+ }
+ 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->getPath();
+ 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
+ const char* str = strdup(result);
+ throw str;
+ }
+ }
+ 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
+ const char* str = strdup(result);
+ throw str;
+ }
+ }
+ }
+ }
+ }
+}
+
+static void notifyBatch(dyld_image_states state)
+{
+ notifyBatchPartial(state, false, NULL);
+}
// 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
@@ -208,17 +495,73 @@
// If DYLD_INSERT_LIBRARIES is used, those libraries are first.
static void addRootImage(ImageLoader* image)
{
- //fprintf(stderr, "addRootImage(%p, %s)\n", image, image->getPath());
+ //dyld::log("addRootImage(%p, %s)\n", image, image->getPath());
// add to list of roots
sImageRoots.push_back(image);
}
+#if IMAGE_NOTIFY_SUPPORT
// Objective-C will contain a __DATA/__image_notify section which contains pointers to a function to call
// whenever any new image is loaded.
static void addImageNeedingNotification(ImageLoader* image)
{
sImagesToNotifyAboutOtherImages.push_back(image);
}
+#endif
+
+static void clearAllDepths()
+{
+ for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++)
+ (*it)->clearDepth();
+}
+
+static unsigned int imageCount()
+{
+ return sAllImages.size();
+}
+
+static void notifySharedCacheInvalid()
+{
+ gSharedCacheNeedsUpdating = true;
+}
+
+
+
+#if __i386__
+static void makeSharedCacheImportSegmentsWritable(bool writable)
+{
+ // if cache was built with read-only __IMPORT segments
+ if ( sImportSegmentsSize != 0 ) {
+ vm_prot_t prot = VM_PROT_EXECUTE | PROT_READ;
+ if ( writable )
+ prot |= VM_PROT_WRITE;
+ vm_protect(mach_task_self(), sImportSegmentsStart, sImportSegmentsSize, false, prot);
+ if ( gLinkContext.verboseMapping ) {
+ dyld::log("%18s at %p->%p altered permissions to %c%c%c\n", "", (char*)sImportSegmentsStart, (char*)sImportSegmentsStart+sImportSegmentsSize-1,
+ (prot & PROT_READ) ? 'r' : '.', (prot & PROT_WRITE) ? 'w' : '.', (prot & PROT_EXEC) ? 'x' : '.' );
+ }
+ }
+}
+#endif
+
+static void setNewProgramVars(const ProgramVars& newVars)
+{
+ // 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;
+}
+#endif
static void addImage(ImageLoader* image)
{
@@ -226,11 +569,7 @@
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);
+ dyld::log("dyld: loaded: %s\n", image->getPath());
}
#if OLD_GDB_DYLD_INTERFACE
@@ -250,12 +589,27 @@
}
}
+ // 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 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());
- }
-
+ // 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());
+ }
+ }
+
+#if IMAGE_NOTIFY_SUPPORT
// tell all interested images
for (std::vector<ImageLoader*>::iterator it=sImagesToNotifyAboutOtherImages.begin(); it != sImagesToNotifyAboutOtherImages.end(); it++) {
dyld_image_info info;
@@ -264,6 +618,7 @@
info.imageFileModDate = image->lastModified();
(*it)->doNotification(dyld_image_removing, 1, &info);
}
+#endif
// remove from master list
for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
@@ -273,10 +628,11 @@
}
}
- // flush find-by-address cache
+ // flush find-by-address cache (do this after removed from master list, so there is no chance it can come back)
if ( sLastImageByAddressCache == image )
sLastImageByAddressCache = NULL;
+#if IMAGE_NOTIFY_SUPPORT
// if in announcement list, pull it out
for (std::vector<ImageLoader*>::iterator it=sImagesToNotifyAboutOtherImages.begin(); it != sImagesToNotifyAboutOtherImages.end(); it++) {
if ( *it == image ) {
@@ -284,6 +640,7 @@
break;
}
}
+#endif
// if in root list, pull it out
for (std::vector<ImageLoader*>::iterator it=sImageRoots.begin(); it != sImageRoots.end(); it++) {
@@ -293,6 +650,11 @@
}
}
+ // 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());
@@ -317,22 +679,31 @@
void initializeMainExecutable()
{
+
+ // record that we've reached this step
+ gLinkContext.startedInitializingMainExecutable = true;
+
+#if __i386__
+ // make all __IMPORT segments in the shared cache read-only
+ // before executing any code
+ makeSharedCacheImportSegmentsWritable(false);
+#endif
+
+ // run initialzers for any inserted dylibs
const int rootCount = sImageRoots.size();
- 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 ( rootCount > 1 ) {
+ for(int i=1; i < rootCount; ++i)
+ sImageRoots[i]->runInitializers(gLinkContext);
+ }
+
+ // run initializers for main executable and everything it brings up
+ sMainExecutable->runInitializers(gLinkContext);
+
+ // 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
if ( sEnv.DYLD_PRINT_STATISTICS )
ImageLoaderMachO::printStatistics(sAllImages.size());
}
@@ -348,14 +719,16 @@
}
-void runTerminators()
+void runTerminators(void* extra)
{
const unsigned int imageCount = sImageFilesNeedingTermination.size();
for(unsigned int i=imageCount; i > 0; --i){
ImageLoader* image = sImageFilesNeedingTermination[i-1];
image->doTermination(gLinkContext);
+ notifySingle(dyld_image_state_terminated, image->machHeader(), image->getPath(), image->lastModified());
}
sImageFilesNeedingTermination.clear();
+ notifyBatch(dyld_image_state_terminated);
}
@@ -397,6 +770,7 @@
return (const char**)result;
}
+
static void paths_expand_roots(const char **paths, const char *key, const char *val)
{
// assert(val != NULL);
@@ -417,13 +791,18 @@
static void removePathWithPrefix(const char* paths[], const char* prefix)
{
- 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];
- }
-}
+ 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;
+}
+
#if 0
static void paths_dump(const char **paths)
@@ -432,7 +811,7 @@
const char **strs = paths;
while(*strs != NULL)
{
- fprintf(stderr, "\"%s\"\n", *strs);
+ dyld::log("\"%s\"\n", *strs);
strs++;
}
return;
@@ -443,7 +822,7 @@
{
uint32_t i = 0;
while ( NULL != argv[i] ) {
- fprintf(stderr, "opt[%i] = \"%s\"\n", i, argv[i]);
+ dyld::log("opt[%i] = \"%s\"\n", i, argv[i]);
i++;
}
}
@@ -451,33 +830,36 @@
static void printEnvironmentVariables(const char* envp[])
{
while ( NULL != *envp ) {
- fprintf(stderr, "%s\n", *envp);
+ dyld::log("%s\n", *envp);
envp++;
}
}
-
-
void processDyldEnvironmentVarible(const char* key, const char* value)
{
if ( strcmp(key, "DYLD_FRAMEWORK_PATH") == 0 ) {
sEnv.DYLD_FRAMEWORK_PATH = parseColonList(value);
+ gSharedCacheDontNotify = true;
}
else if ( strcmp(key, "DYLD_FALLBACK_FRAMEWORK_PATH") == 0 ) {
sEnv.DYLD_FALLBACK_FRAMEWORK_PATH = parseColonList(value);
+ gSharedCacheDontNotify = true;
}
else if ( strcmp(key, "DYLD_LIBRARY_PATH") == 0 ) {
sEnv.DYLD_LIBRARY_PATH = parseColonList(value);
+ gSharedCacheDontNotify = true;
}
else if ( strcmp(key, "DYLD_FALLBACK_LIBRARY_PATH") == 0 ) {
sEnv.DYLD_FALLBACK_LIBRARY_PATH = parseColonList(value);
+ gSharedCacheDontNotify = true;
}
else if ( (strcmp(key, "DYLD_ROOT_PATH") == 0) || (strcmp(key, "DYLD_PATHS_ROOT") == 0) ) {
+ gSharedCacheDontNotify = true;
if ( strcmp(value, "/") != 0 ) {
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\n");
+ dyld::warn("DYLD_ROOT_PATH not used because it contains a non-absolute path\n");
sEnv.DYLD_ROOT_PATH = NULL;
break;
}
@@ -485,16 +867,12 @@
}
}
else if ( strcmp(key, "DYLD_IMAGE_SUFFIX") == 0 ) {
+ gSharedCacheDontNotify = true;
gLinkContext.imageSuffix = value;
}
else if ( strcmp(key, "DYLD_INSERT_LIBRARIES") == 0 ) {
sEnv.DYLD_INSERT_LIBRARIES = parseColonList(value);
- }
- 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");
+ gSharedCacheDontNotify = true;
}
else if ( strcmp(key, "DYLD_PRINT_OPTS") == 0 ) {
sEnv.DYLD_PRINT_OPTS = true;
@@ -502,61 +880,39 @@
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 ) {
- gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
- }
- else if ( strcmp(key, "DYLD_SLIDE_AND_PACK_DYLIBS") == 0 ) {
- gLinkContext.slideAndPackDylibs = true;
+ // ignore, no longer relevant but some scripts still set it
}
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");
+ gSharedCacheDontNotify = true;
}
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;
}
@@ -576,6 +932,7 @@
gLinkContext.verboseWarnings = true;
}
else if ( strcmp(key, "DYLD_SHARED_REGION") == 0 ) {
+ gSharedCacheDontNotify = true;
if ( strcmp(value, "private") == 0 ) {
gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
}
@@ -589,10 +946,11 @@
gLinkContext.sharedRegionMode = ImageLoader::kUseSharedRegion;
}
else {
- fprintf(stderr, "dyld: warning unknown option to DYLD_SHARED_REGION. Valid options are: use, private, avoid\n");
+ dyld::warn("unknown option to DYLD_SHARED_REGION. Valid options are: use, private, avoid\n");
}
}
else if ( strcmp(key, "DYLD_IGNORE_PREBINDING") == 0 ) {
+ gSharedCacheDontNotify = true;
if ( strcmp(value, "all") == 0 ) {
gLinkContext.prebindUsage = ImageLoader::kUseNoPrebinding;
}
@@ -606,13 +964,14 @@
gLinkContext.prebindUsage = ImageLoader::kUseSplitSegPrebinding;
}
else {
- fprintf(stderr, "dyld: warning unknown option to DYLD_IGNORE_PREBINDING. Valid options are: all, app, nonsplit\n");
+ dyld::warn("unknown option to DYLD_IGNORE_PREBINDING. Valid options are: all, app, nonsplit\n");
}
}
else {
- fprintf(stderr, "dyld: warning, unknown environment variable: %s\n", key);
- }
-}
+ dyld::warn("unknown environment variable: %s\n", key);
+ }
+}
+
//
// For security, setuid programs ignore DYLD_* environment variables.
@@ -621,6 +980,9 @@
//
static void pruneEnvironmentVariables(const char* envp[], const char*** applep)
{
+ // setuit binaries don't trigger a cache rebuild
+ gSharedCacheDontNotify = true;
+
// delete all DYLD_* and LD_LIBRARY_PATH environment variables
int removedCount = 0;
const char** d = envp;
@@ -642,20 +1004,11 @@
} while ( *d++ != NULL );
}
- // setup DYLD_FALLBACK_FRAMEWORK_PATH, if not set in environment
- if ( sEnv.DYLD_FALLBACK_FRAMEWORK_PATH == NULL ) {
- const char** paths = sFrameworkFallbackPaths;
- removePathWithPrefix(paths, "$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;
- removePathWithPrefix(paths, "$HOME");
- sEnv.DYLD_FALLBACK_LIBRARY_PATH = paths;
- }
-}
+ // 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)
{
@@ -682,7 +1035,7 @@
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;
@@ -707,7 +1060,7 @@
static void getHostInfo()
{
-#if 0
+#if 1
struct host_basic_info info;
mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
mach_port_t hostPort = mach_host_self();
@@ -718,17 +1071,30 @@
sHostCPU = info.cpu_type;
sHostCPUsubtype = info.cpu_subtype;
-#endif
-
+#else
size_t valSize = sizeof(sHostCPU);
if (sysctlbyname ("hw.cputype", &sHostCPU, &valSize, NULL, 0) != 0)
throw "sysctlbyname(hw.cputype) failed";
valSize = sizeof(sHostCPUsubtype);
if (sysctlbyname ("hw.cpusubtype", &sHostCPUsubtype, &valSize, NULL, 0) != 0)
throw "sysctlbyname(hw.cpusubtype) failed";
-}
-
-bool validImage(ImageLoader* possibleImage)
+#endif
+}
+
+static void checkSharedRegionDisable()
+{
+ #if __ppc__ || __i386__
+ // if main executable has segments that overlap the shared region,
+ // then disable using the shared region
+ if ( sMainExecutable->overlapsWithAddressRange((void*)0x90000000, (void*)0xAFFFFFFF) ) {
+ gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
+ if ( gLinkContext.verboseMapping )
+ dyld::warn("disabling shared region because main executable overlaps\n");
+ }
+ #endif
+}
+
+bool validImage(const ImageLoader* possibleImage)
{
const unsigned int imageCount = sAllImages.size();
for(unsigned int i=0; i < imageCount; ++i) {
@@ -741,35 +1107,13 @@
uint32_t getImageCount()
{
- if ( sAllImagesMightContainUnlinkedImages ) {
- uint32_t count = 0;
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- if ( (*it)->isLinked() )
- ++count;
- }
- return count;
- }
- else {
- return sAllImages.size();
- }
+ return sAllImages.size();
}
ImageLoader* getIndexedImage(unsigned int index)
{
- if ( sAllImagesMightContainUnlinkedImages ) {
- uint32_t count = 0;
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- if ( (*it)->isLinked() ) {
- if ( index == count )
- return *it;
- ++count;
- }
- }
- }
- else {
- if ( index < sAllImages.size() )
- return sAllImages[index];
- }
+ if ( index < sAllImages.size() )
+ return sAllImages[index];
return NULL;
}
@@ -792,7 +1136,7 @@
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);
+ dyld::log("findImageContainingAddress(): cache hit = %d, miss = %d, unknown = %d\n", cacheHit, cacheMiss, cacheNotMacho);
#endif
// first look in image where last address was found rdar://problem/3685517
if ( (sLastImageByAddressCache != NULL) && sLastImageByAddressCache->containsAddress(addr) ) {
@@ -922,6 +1266,8 @@
}
+// only for architectures that use cpu-sub-types
+#if CPU_SUBTYPES_SUPPORTED
const cpu_subtype_t CPU_SUBTYPE_END_OF_LIST = -1;
@@ -956,23 +1302,6 @@
};
-//
-// 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)
@@ -984,15 +1313,6 @@
return kPPC32[i];
}
break;
- 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;
}
@@ -1007,7 +1327,7 @@
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] == archs[fatIndex].cpusubtype) ) {
+ && (list[subTypeIndex] == (cpu_subtype_t)OSSwapBigToHostInt32(archs[fatIndex].cpusubtype)) ) {
*offset = OSSwapBigToHostInt32(archs[fatIndex].offset);
*len = OSSwapBigToHostInt32(archs[fatIndex].size);
return true;
@@ -1040,33 +1360,19 @@
if ( (cpu_type_t)OSSwapBigToHostInt32(archs[i].cputype) == cpu) {
switch (cpu) {
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;
- 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;
- case CPU_TYPE_X86_64:
- if ( (cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == CPU_SUBTYPE_X86_64_ALL ) {
- *offset = OSSwapBigToHostInt32(archs[i].offset);
- *len = OSSwapBigToHostInt32(archs[i].size);
- return true;
- }
- break;
}
}
}
return false;
}
+#endif // CPU_SUBTYPES_SUPPORTED
//
// A fat file may contain multiple sub-images for the same cpu-type,
@@ -1075,6 +1381,7 @@
//
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;
@@ -1094,20 +1401,32 @@
// 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. 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. //
bool isCompatibleMachO(const uint8_t* firstPage)
{
+#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
const mach_header* mh = (mach_header*)firstPage;
if ( mh->magic == sMainExecutableMachHeader->magic ) {
if ( mh->cputype == sMainExecutableMachHeader->cputype ) {
@@ -1128,36 +1447,44 @@
return true;
}
- // cpu unknown, so don't know if subtype is compatible
- // only load _ALL variant
+ // cpu type has no ordered list of subtypes
switch (mh->cputype) {
case CPU_TYPE_POWERPC:
- case CPU_TYPE_POWERPC64:
+ // allow _ALL to be used by any client
if ( mh->cpusubtype == CPU_SUBTYPE_POWERPC_ALL )
return true;
break;
+ case CPU_TYPE_POWERPC64:
case CPU_TYPE_I386:
- if ( mh->cpusubtype == CPU_SUBTYPE_I386_ALL )
- return true;
- break;
case CPU_TYPE_X86_64:
- if ( mh->cpusubtype == CPU_SUBTYPE_X86_64_ALL )
- return true;
- break;
- }
- }
- }
+ // 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
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 struct mach_header* mh, const char* path)
+static ImageLoader* instantiateFromLoadedImage(const struct mach_header* mh, uintptr_t slide, const char* path)
{
// try mach-o loader
if ( isCompatibleMachO((const uint8_t*)mh) ) {
- ImageLoader* image = new ImageLoaderMachO(path, mh, 0, gLinkContext);
+ ImageLoader* image = new ImageLoaderMachO(mh, slide, path, gLinkContext);
addImage(image);
return image;
}
@@ -1165,31 +1492,90 @@
throw "main executable not a known format";
}
-
-
+#if DYLD_SHARED_CACHE_SUPPORT
+static ImageLoader* findSharedCacheImage(const struct stat& stat_buf, const char* path)
+{
+ if ( sSharedCache != NULL ) {
+ // 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) {
+ // check mtime and inode first because it is fast
+ if ( ((time_t)p->modTime == stat_buf.st_mtime) && ((ino_t)p->inode == stat_buf.st_ino) ) {
+ // mod-time and inode match an image in the shared cache, now check path
+ const char* pathInCache = (char*)sSharedCache + p->pathFileOffset;
+ bool cacheHit = (strcmp(path, pathInCache) == 0);
+ if ( ! cacheHit ) {
+ // path does not match install name of dylib in cache, but inode and mtime does match
+ // perhaps path is a symlink to the cached dylib
+ struct stat pathInCacheStatBuf;
+ if ( stat(pathInCache, &pathInCacheStatBuf) != -1 )
+ cacheHit = ( (pathInCacheStatBuf.st_dev == stat_buf.st_dev) && (pathInCacheStatBuf.st_ino == stat_buf.st_ino) );
+ }
+ if ( cacheHit ) {
+ // found image in cache, instantiate an ImageLoader with it
+ return new ImageLoaderMachO((struct mach_header*)(p->address), pathInCache, stat_buf, gLinkContext);
+ }
+ }
+ }
+ }
+ return NULL;
+}
+#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);
+ 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;
+}
// map in file and instantiate an ImageLoader
static ImageLoader* loadPhase6(int fd, struct stat& stat_buf, const char* path, const LoadContext& context)
{
- //fprintf(stderr, "%s(%s)\n", __func__ , path);
+ //dyld::log("%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
+ uint8_t firstPage[4096];
+ bool shortPage = false;
+
+ // min mach-o file is 4K
if ( fileLength < 4096 ) {
- throw "file to short";
- }
-
- uint8_t firstPage[4096];
- pread(fd, firstPage, 4096,0);
+ pread(fd, firstPage, fileLength, 0);
+ shortPage = true;
+ }
+ else {
+ pread(fd, firstPage, 4096,0);
+ }
// if fat wrapper, find usable sub-file
const fat_header* fileStartAsFat = (fat_header*)firstPage;
@@ -1204,46 +1590,17 @@
// try mach-o loader
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;
- }
+ if ( shortPage )
+ throw "file too short";
// instantiate an image
ImageLoader* image = new ImageLoaderMachO(path, fd, firstPage, fileOffset, fileLength, stat_buf, gLinkContext);
- // 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...
+ // validate
+ return checkandAddImage(image, context);
+ }
+
+ // try other file formats here...
// throw error about what was found
@@ -1263,40 +1620,50 @@
// 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);
+ //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
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 )
+ // 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;
-
- 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";
+ }
// in case image was renamed or found via symlinks, check for inode match
image = findLoadedImage(stat_buf);
if ( image != NULL )
return image;
- // needed to implement NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED
+ // do nothing if not already loaded and if RTLD_NOLOAD or NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED
if ( context.dontLoad )
return NULL;
-
+
+#if DYLD_SHARED_CACHE_SUPPORT
+ // see if this image is in shared cache
+ image = findSharedCacheImage(stat_buf, path);
+ if ( image != NULL ) {
+ return checkandAddImage(image, context);
+ }
+#endif
+
+ // open file (automagically closed when this function exits)
+ FileOpener file(path);
+
+ // just return NULL if file not found
+ if ( file.getFileDescriptor() == -1 )
+ return NULL;
+
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);
+ const char* newMsg = dyld::mkstringf("%s: %s", path, msg);
exceptions->push_back(newMsg);
+ free((void*)msg);
return NULL;
}
}
@@ -1304,7 +1671,7 @@
// look for path match with existing loaded images
static ImageLoader* loadPhase5check(const char* path, const LoadContext& context)
{
- //fprintf(stderr, "%s(%s)\n", __func__ , path);
+ //dyld::log("%s(%s)\n", __func__ , path);
// search path against load-path and install-path of all already loaded images
uint32_t hash = ImageLoader::hash(path);
for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
@@ -1328,7 +1695,7 @@
}
}
- //fprintf(stderr, "check(%s) => NULL\n", path);
+ //dyld::log("%s(%s) => NULL\n", __func__, path);
return NULL;
}
@@ -1336,7 +1703,7 @@
// open or check existing
static ImageLoader* loadPhase5(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
{
- //fprintf(stderr, "%s(%s)\n", __func__ , path);
+ //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
if ( exceptions != NULL )
return loadPhase5open(path, context, exceptions);
else
@@ -1346,7 +1713,7 @@
// try with and without image suffix
static ImageLoader* loadPhase4(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
{
- //fprintf(stderr, "%s(%s)\n", __func__ , path);
+ //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
ImageLoader* image = NULL;
if ( gLinkContext.imageSuffix != NULL ) {
char pathWithSuffix[strlen(path)+strlen( gLinkContext.imageSuffix)+2];
@@ -1358,13 +1725,21 @@
return image;
}
+static ImageLoader* loadPhase2(const char* path, const LoadContext& context,
+ const char* const frameworkPaths[], const char* const libraryPaths[],
+ std::vector<const char*>* exceptions); // forward reference
+
// expand @ variables
static ImageLoader* loadPhase3(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
{
- //fprintf(stderr, "%s(%s)\n", __func__ , path);
+ //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
ImageLoader* image = NULL;
if ( strncmp(path, "@executable_path/", 17) == 0 ) {
+ // executable_path cannot be in used in any binary in a setuid process rdar://problem/4589305
+ if ( sMainExecutableIsSetuid ) {
+ throwf("unsafe use of @executable_path in %s with setuid binary", context.origin);
+ }
// handle @executable_path path prefix
const char* executablePath = sExecPath;
char newPath[strlen(executablePath) + strlen(path)];
@@ -1394,6 +1769,10 @@
}
}
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 ( sMainExecutableIsSetuid && (strcmp(context.origin, sExecPath) == 0) )
+ throwf("unsafe use of @loader_path in %s with setuid binary", context.origin);
+
// handle @loader_path path prefix
char newPath[strlen(context.origin) + strlen(path)];
strcpy(newPath, context.origin);
@@ -1421,6 +1800,38 @@
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, context, exceptions);
+ if ( image != NULL )
+ return image;
+ }
+ }
+ }
+
+ // substitute @rpath with LD_LIBRARY_PATH
+ if ( sEnv.LD_LIBRARY_PATH != NULL ) {
+ image = loadPhase2(trailingPath, 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 ( sMainExecutableIsSetuid && (path[0] != '/') ) {
+ throwf("unsafe use of relative rpath %s in %s with setuid binary", path, context.origin);
+ }
return loadPhase4(path, context, exceptions);
}
@@ -1431,7 +1842,7 @@
const char* const frameworkPaths[], const char* const libraryPaths[],
std::vector<const char*>* exceptions)
{
- //fprintf(stderr, "%s(%s)\n", __func__ , path);
+ //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
ImageLoader* image = NULL;
const char* frameworkPartialPath = getFrameworkPartialPath(path);
if ( frameworkPaths != NULL ) {
@@ -1442,7 +1853,7 @@
strcpy(npath, *fp);
strcat(npath, "/");
strcat(npath, frameworkPartialPath);
- //fprintf(stderr, "dyld: fallback framework path used: %s() -> loadPhase4(\"%s\", ...)\n", __func__, npath);
+ //dyld::log("dyld: fallback framework path used: %s() -> loadPhase4(\"%s\", ...)\n", __func__, npath);
image = loadPhase4(npath, context, exceptions);
if ( image != NULL )
return image;
@@ -1457,7 +1868,7 @@
strcpy(libpath, *lp);
strcat(libpath, "/");
strcat(libpath, libraryLeafName);
- //fprintf(stderr, "dyld: fallback library path used: %s() -> loadPhase4(\"%s\", ...)\n", __func__, libpath);
+ //dyld::log("dyld: fallback library path used: %s() -> loadPhase4(\"%s\", ...)\n", __func__, libpath);
image = loadPhase4(libpath, context, exceptions);
if ( image != NULL )
return image;
@@ -1469,7 +1880,7 @@
// try search overrides and fallbacks
static ImageLoader* loadPhase1(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
{
- //fprintf(stderr, "%s(%s)\n", __func__ , path);
+ //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
ImageLoader* image = NULL;
// handle LD_LIBRARY_PATH environment variables that force searching
@@ -1492,7 +1903,7 @@
return image;
// try fallback paths during second time (will open file)
- if ( (exceptions != NULL) && ((sEnv.DYLD_FALLBACK_FRAMEWORK_PATH != NULL) || (sEnv.DYLD_FALLBACK_LIBRARY_PATH != NULL)) ) {
+ if ( !context.dontLoad && (exceptions != NULL) && ((sEnv.DYLD_FALLBACK_FRAMEWORK_PATH != NULL) || (sEnv.DYLD_FALLBACK_LIBRARY_PATH != NULL)) ) {
image = loadPhase2(path, context, sEnv.DYLD_FALLBACK_FRAMEWORK_PATH, sEnv.DYLD_FALLBACK_LIBRARY_PATH, exceptions);
if ( image != NULL )
return image;
@@ -1504,8 +1915,8 @@
// try root substitutions
static ImageLoader* loadPhase0(const char* path, const LoadContext& context, std::vector<const char*>* exceptions)
{
- //fprintf(stderr, "%s(%s)\n", __func__ , path);
-
+ //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
+
// handle DYLD_ROOT_PATH which forces absolute paths to use a new root
if ( (sEnv.DYLD_ROOT_PATH != NULL) && (path[0] == '/') ) {
for(const char* const* rootPath = sEnv.DYLD_ROOT_PATH ; *rootPath != NULL; ++rootPath) {
@@ -1538,7 +1949,7 @@
//
ImageLoader* load(const char* path, const LoadContext& context)
{
- //fprintf(stderr, "%s(%s)\n", __func__ , path);
+ //dyld::log("%s(%s)\n", __func__ , path);
char realPath[PATH_MAX];
// when DYLD_IMAGE_SUFFIX is in used, do a realpath(), otherwise a load of "Foo.framework/Foo" will not match
if ( context.useSearchPaths && ( gLinkContext.imageSuffix != NULL) ) {
@@ -1550,14 +1961,12 @@
ImageLoader* image = loadPhase0(path, context, NULL);
if ( image != NULL )
return image;
-
+
// try all path permutations and try open() until first sucesss
std::vector<const char*> exceptions;
image = loadPhase0(path, context, &exceptions);
if ( image != NULL )
return image;
- else if ( context.dontLoad )
- return NULL;
else if ( exceptions.size() == 0 )
throw "image not found";
else {
@@ -1571,11 +1980,235 @@
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
+
+
+// hack until dyld no longer needs to run on Leopard kernels that don't have new shared region syscall
+static bool newSharedRegionSyscallAvailable()
+{
+ int shreg_version;
+ size_t buffer_size = sizeof(shreg_version);
+ if ( sysctlbyname("vm.shared_region_version", &shreg_version, &buffer_size, NULL, 0) == 0 ) {
+ if ( shreg_version == 3 )
+ return true;
+ }
+ return false;
+}
+
+
+static int __attribute__((noinline)) _shared_region_check_np(uint64_t* start_address)
+{
+ if ( (gLinkContext.sharedRegionMode == ImageLoader::kUseSharedRegion) && newSharedRegionSyscallAvailable() )
+ return syscall(294, start_address);
+ return -1;
+}
+
+
+static int __attribute__((noinline)) _shared_region_map_np(int fd, uint32_t count, const shared_file_mapping_np mappings[])
+{
+ int result;
+ if ( (gLinkContext.sharedRegionMode == ImageLoader::kUseSharedRegion) && newSharedRegionSyscallAvailable() ) {
+ return syscall(295, fd, count, mappings);
+ }
+
+ // remove the shared region sub-map
+#if __ppc__ || __i386__
+ vm_address_t addr = (vm_address_t)0x90000000;
+ vm_deallocate(mach_task_self(), addr, 0x20000000);
+#elif __ppc64__ || __x86_64__
+ vm_address_t addr = (vm_address_t)0x7FFF60000000;
+ vm_deallocate(mach_task_self(), addr, 0x80000000);
+#endif
+
+ // map cache just for this process with mmap()
+ bool failed = false;
+ const shared_file_mapping_np* start = mappings;
+ const shared_file_mapping_np* end = &mappings[count];
+ for (const shared_file_mapping_np* p = start; p < end; ++p ) {
+ void* mmapAddress = (void*)(uintptr_t)(p->sfm_address);
+ size_t size = p->sfm_size;
+ 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;
+ mmapAddress = mmap(mmapAddress, size, protection, MAP_FIXED | MAP_PRIVATE, fd, offset);
+ if ( mmap(mmapAddress, size, protection, MAP_FIXED | MAP_PRIVATE, fd, offset) != mmapAddress )
+ failed = true;
+ }
+ if ( !failed ) {
+ result = 0;
+ gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
+ }
+ else {
+ result = -1;
+ gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
+ if ( gLinkContext.verboseMapping )
+ dyld::log("dyld: shared cached cannot be mapped\n");
+ }
+
+ return result;
+}
+
+
+
+#if __ppc__
+ #define ARCH_NAME "ppc"
+ #define ARCH_NAME_ROSETTA "rosetta"
+ #define ARCH_VALUE CPU_TYPE_POWERPC
+ #define ARCH_CACHE_MAGIC "dyld_v1 ppc"
+#elif __ppc64__
+ #define ARCH_NAME "ppc64"
+ #define ARCH_VALUE CPU_TYPE_POWERPC64
+ #define ARCH_CACHE_MAGIC "dyld_v1 ppc64"
+#elif __i386__
+ #define ARCH_NAME "i386"
+ #define ARCH_VALUE CPU_TYPE_I386
+ #define ARCH_CACHE_MAGIC "dyld_v1 i386"
+#elif __x86_64__
+ #define ARCH_NAME "x86_64"
+ #define ARCH_VALUE CPU_TYPE_X86_64
+ #define ARCH_CACHE_MAGIC "dyld_v1 x86_64"
+#endif
+
+const void* imMemorySharedCacheHeader()
+{
+ return sSharedCache;
+}
+
+int openSharedCacheFile()
+{
+#if __ppc__
+ // rosetta cannot handle optimized _ppc cache, so it use _rosetta cache instead, rdar://problem/5495438
+ if ( isRosetta() )
+ return ::open(DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME_ROSETTA, O_RDONLY);
+ else
+#endif
+ return ::open(DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME, O_RDONLY);
+}
+
+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");
+ }
+ }
+ else {
+ // map in shared cache to shared region
+ int fd = openSharedCacheFile();
+ if ( fd != -1 ) {
+ uint8_t firstPage[4096];
+ if ( ::read(fd, firstPage, 4096) == 4096 ) {
+ dyld_cache_header* header = (dyld_cache_header*)firstPage;
+ if ( strcmp(header->magic, ARCH_CACHE_MAGIC) == 0 ) {
+ const shared_file_mapping_np* mappings = (shared_file_mapping_np*)&firstPage[header->mappingOffset];
+ const shared_file_mapping_np* const end = &mappings[header->mappingCount];
+ // validate that the cache file has not been truncated
+ bool goodCache = false;
+ struct stat stat_buf;
+ if ( fstat(fd, &stat_buf) == 0 ) {
+ goodCache = true;
+ for (const shared_file_mapping_np* p = mappings; p < end; ++p) {
+ // rdar://problem/5694507 old update_dyld_shared_cache tool could make a cache file
+ // that is not page aligned, but otherwise ok.
+ if ( p->sfm_file_offset+p->sfm_size > (uint64_t)(stat_buf.st_size+4095 & (-4096)) )
+ goodCache = false;
+ }
+ }
+ if ( goodCache ) {
+ const shared_file_mapping_np* mappings = (shared_file_mapping_np*)&firstPage[header->mappingOffset];
+ if (_shared_region_map_np(fd, header->mappingCount, mappings) == 0) {
+ // sucessfully mapped cache into shared region
+ sSharedCache = (dyld_cache_header*)mappings[0].sfm_address;
+ }
+ }
+ else {
+ gSharedCacheNeedsUpdating = true;
+ dyld::log("dyld: shared cached file is corrupt: " DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME "\n");
+ }
+ }
+ else {
+ gSharedCacheNeedsUpdating = true;
+ if ( gLinkContext.verboseMapping )
+ dyld::log("dyld: shared cached file is invalid\n");
+ }
+ }
+ else {
+ gSharedCacheNeedsUpdating = true;
+ if ( gLinkContext.verboseMapping )
+ dyld::log("dyld: shared cached file cannot be read\n");
+ }
+ close(fd);
+ }
+ else {
+ gSharedCacheNotFound = true;
+ if ( gLinkContext.verboseMapping )
+ dyld::log("dyld: shared cached file cannot be opened\n");
+ }
+ }
+
+ // 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 shared_file_mapping_np* const start = (shared_file_mapping_np*)((uint8_t*)sSharedCache + sSharedCache->mappingOffset);
+ dyld_shared_cache_ranges.sharedRegionsCount = sSharedCache->mappingCount;
+ // only room to tell gdb about first four regions
+ if ( dyld_shared_cache_ranges.sharedRegionsCount > 4 )
+ dyld_shared_cache_ranges.sharedRegionsCount = 4;
+ if ( gLinkContext.verboseMapping ) {
+ if ( gLinkContext.sharedRegionMode == ImageLoader::kUseSharedRegion )
+ dyld::log("dyld: Mapping shared cache\n");
+ else if ( gLinkContext.sharedRegionMode == ImageLoader::kUsePrivateSharedRegion )
+ dyld::log("dyld: Mapping private shared cache\n");
+ }
+ const shared_file_mapping_np* const end = &start[dyld_shared_cache_ranges.sharedRegionsCount];
+ int index = 0;
+ for (const shared_file_mapping_np* p = start; p < end; ++p, ++index ) {
+ dyld_shared_cache_ranges.ranges[index].start = p->sfm_address;
+ dyld_shared_cache_ranges.ranges[index].length = p->sfm_size;
+ if ( gLinkContext.verboseMapping ) {
+ dyld::log(" 0x%08llX->0x%08llX %s%s%s init=%x, max=%x\n", p->sfm_address, p->sfm_address+p->sfm_size-1,
+ ((p->sfm_init_prot & VM_PROT_READ) ? "read " : ""),
+ ((p->sfm_init_prot & VM_PROT_WRITE) ? "write " : ""),
+ ((p->sfm_init_prot & VM_PROT_EXECUTE) ? "execute " : ""), p->sfm_init_prot, p->sfm_max_prot);
+ }
+ #if __i386__
+ // record if a non-writable and executable region is found in the R/W shared region
+ // this is the __IMPORT segments. dyld will turn write protection on and off as needed
+ if ( (p->sfm_init_prot == (VM_PROT_READ|VM_PROT_EXECUTE)) && ((p->sfm_address & 0xF0000000) == 0xA0000000) ) {
+ sImportSegmentsStart = p->sfm_address;
+ sImportSegmentsSize = p->sfm_size;
+ makeSharedCacheImportSegmentsWritable(true);
+ }
+ #endif
+ }
+
+ }
+}
+#endif // #if DYLD_SHARED_CACHE_SUPPORT
@@ -1588,9 +2221,6 @@
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";
@@ -1631,7 +2261,7 @@
}
}
- // try mach-o each loader
+ // try 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
@@ -1640,7 +2270,7 @@
return image;
}
- // try other file formats...
+ // try other file formats here...
// throw error about what was found
switch (*(uint32_t*)mem) {
@@ -1661,17 +2291,12 @@
// now add to list to get notified when any more images are added
sAddImageCallbacks.push_back(func);
- // 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());
-// }
+ // 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());
+ }
}
void registerRemoveCallback(ImageCallback func)
@@ -1696,21 +2321,14 @@
return error_string;
}
+
void halt(const char* message)
{
- fprintf(stderr, "dyld: %s\n", message);
+ dyld::log("dyld: %s\n", message);
setErrorMessage(message);
strncpy(error_string, message, sizeof(error_string)-1);
error_string[sizeof(error_string)-1] = '\0';
-
-#if __ppc__ || __ppc64__
- __asm__ ("trap");
-#elif __i386__ || __x86_64__
- __asm__ ("int3");
-#else
- #error unknown architecture
-#endif
- abort(); // needed to suppress warning that noreturn function returns
+ dyld_fatal_error(error_string);
}
@@ -1719,8 +2337,8 @@
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 ( gThreadHelpers != NULL )
- (*gThreadHelpers->lockForReading)();
+ if ( gLibSystemHelpers != NULL )
+ (*gLibSystemHelpers->lockForReading)();
#endif
// lookup and bind lazy pointer and get target address
try {
@@ -1736,17 +2354,17 @@
target = dyld::findImageByMachHeader(mh);
#endif
if ( target == NULL )
- throw "image not found for lazy pointer";
+ throwf("image not found for lazy pointer at %p", lazyPointer);
result = target->doBindLazySymbol(lazyPointer, gLinkContext);
}
catch (const char* message) {
- fprintf(stderr, "dyld: lazy symbol binding failed: %s\n", message);
+ dyld::log("dyld: lazy symbol binding failed: %s\n", message);
halt(message);
}
// release read-lock on dyld's data structures
#if 0
- if ( gThreadHelpers != NULL )
- (*gThreadHelpers->unlockForReading)();
+ if ( gLibSystemHelpers != NULL )
+ (*gLibSystemHelpers->unlockForReading)();
#endif
// return target address to glue which jumps to it with real parameters restored
return result;
@@ -1772,7 +2390,7 @@
}
}
-static bool findExportedSymbol(const char* name, bool onlyInCoalesced, const ImageLoader::Symbol** sym, ImageLoader** image)
+static bool findExportedSymbol(const char* name, bool onlyInCoalesced, const ImageLoader::Symbol** sym, const ImageLoader** image)
{
// try ZeroLink short cut to finding bundle which exports this symbol
if ( sBundleLocation != NULL ) {
@@ -1789,10 +2407,15 @@
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;
+ if ( onlyInCoalesced ) {
+ // but ZeroLink does not know about coalescing weak symbols, so ignore ZeroLink's hint when onlyInCoalesced==true
+ }
+ else {
+ *sym = zlImage->findExportedSymbol(name, NULL, false, image);
+ if ( *sym != NULL ) {
+ *image = zlImage;
+ return true;
+ }
}
}
else {
@@ -1801,7 +2424,7 @@
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());
+ //dyld::log("dyld: search for %s in %s\n", name, anImage->getPath());
*sym = anImage->findExportedSymbol(name, NULL, false, image);
if ( *sym != NULL ) {
return true;
@@ -1812,11 +2435,19 @@
}
// search all images in order
- ImageLoader* firstWeakImage = NULL;
+ const 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, NULL, false, image);
if ( *sym != NULL ) {
@@ -1844,18 +2475,18 @@
return false;
}
-bool flatFindExportedSymbol(const char* name, const ImageLoader::Symbol** sym, ImageLoader** image)
+bool flatFindExportedSymbol(const char* name, const ImageLoader::Symbol** sym, const ImageLoader** image)
{
return findExportedSymbol(name, false, sym, image);
}
-bool findCoalescedExportedSymbol(const char* name, const ImageLoader::Symbol** sym, ImageLoader** image)
+bool findCoalescedExportedSymbol(const char* name, const ImageLoader::Symbol** sym, const ImageLoader** image)
{
return findExportedSymbol(name, true, sym, image);
}
-bool flatFindExportedSymbolWithHint(const char* name, const char* librarySubstring, const ImageLoader::Symbol** sym, ImageLoader** image)
+bool flatFindExportedSymbolWithHint(const char* name, const char* librarySubstring, const ImageLoader::Symbol** sym, const ImageLoader** image)
{
// search all images in order
const unsigned int imageCount = sAllImages.size();
@@ -1872,52 +2503,137 @@
return false;
}
-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[])
+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 ) {
+ 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->getPath();
+ 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, bool findDLL, const char* origin, const ImageLoader::RPathChain* rpaths)
{
dyld::LoadContext context;
context.useSearchPaths = search;
context.useLdLibraryPath = false;
+ context.implicitRPath = false;
+ context.matchByInstallName = false;
context.dontLoad = false;
context.mustBeBundle = false;
context.mustBeDylib = true;
- context.matchByInstallName = false;
+ context.findDLL = findDLL;
context.origin = origin;
- context.rpath = rpath;
+ context.rpath = rpaths;
return load(libraryName, context);
}
-
-static void setContext(int argc, const char* argv[], const char* envp[], const char* apple[])
+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 struct mach_header* mainExecutableMH, 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.undefinedHandler = &undefinedHandler;
+#if IMAGE_NOTIFY_SUPPORT
gLinkContext.addImageNeedingNotification = &addImageNeedingNotification;
gLinkContext.notifyAdding = ¬ifyAdding;
+#endif
gLinkContext.getAllMappedRegions = &getMappedRegions;
gLinkContext.bindingHandler = NULL;
+ gLinkContext.notifySingle = ¬ifySingle;
+ gLinkContext.notifyBatch = ¬ifyBatch;
+ gLinkContext.removeImage = &removeImage;
+ gLinkContext.registerDOFs = ®isterDOFs;
+ gLinkContext.clearAllDepths = &clearAllDepths;
+ gLinkContext.imageCount = &imageCount;
+ gLinkContext.notifySharedCacheInvalid= ¬ifySharedCacheInvalid;
+#if __i386__
+ gLinkContext.makeSharedCacheImportSegmentsWritable = &makeSharedCacheImportSegmentsWritable;
+#endif
+ gLinkContext.setNewProgramVars = &setNewProgramVars;
+#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;
-}
-
-static bool isRosetta()
+ 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 __ppc__ || __i386__
+bool isRosetta()
{
int mib[] = { CTL_KERN, KERN_CLASSIC, getpid() };
int is_classic = 0;
@@ -1929,11 +2645,26 @@
}
return false;
}
-
-void link(ImageLoader* image, ImageLoader::BindingLaziness bindness, ImageLoader::InitializerRunning runInitializers)
+#endif
+
+#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)
{
// add to list of known images. This did not happen at creation time for bundles
- if ( image->isBundle() )
+ if ( image->isBundle() && !image->isLinked() )
addImage(image);
// we detect root images as those not linked in yet
@@ -1951,11 +2682,11 @@
// process images
try {
- image->link(gLinkContext, bindness, runInitializers, sAddImageCallbacks.size());
+ image->link(gLinkContext, forceLazysBound, false, loaderRPaths);
}
catch (const char* msg) {
- sAllImagesMightContainUnlinkedImages = true;
- throw msg;
+ garbageCollectImages();
+ throw;
}
#if OLD_GDB_DYLD_INTERFACE
@@ -1965,16 +2696,86 @@
}
-//
-// _pthread_keys is partitioned in a lower part that dyld will use; libSystem
-// will use the upper part. We set __pthread_tsd_first to 1 as the start of
-// the lower part. Libc will take #1 and c++ exceptions will take #2. There
-// is one free key=3 left.
-//
-extern "C" {
- extern int __pthread_tsd_first;
-}
-
+void runInitializers(ImageLoader* image)
+{
+ // do bottom up initialization
+ image->runInitializers(gLinkContext);
+}
+
+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() ) {
+ try {
+ //dyld::log("garbageCollectImages: deleting %s\n", image->getPath());
+ image->setBeingRemoved();
+ removeImage(image);
+ delete 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());
+ delete 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.useLdLibraryPath = false;
+ context.implicitRPath = false;
+ context.matchByInstallName = false;
+ context.dontLoad = false;
+ context.mustBeBundle = false;
+ context.mustBeDylib = true;
+ context.findDLL = 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));
+ }
+}
//
// Entry point for dyld. The kernel loads dyld and jumps to __dyld_start which
@@ -1983,10 +2784,9 @@
// Returns address of main() in target program which __dyld_start jumps to
//
uintptr_t
-_main(const struct mach_header* mainExecutableMH, int argc, const char* argv[], const char* envp[], const char* apple[])
+_main(const struct mach_header* mainExecutableMH, uintptr_t mainExecutableSlide, int argc, const char* argv[], const char* envp[], const char* apple[])
{
- // set pthread keys to dyld range
- __pthread_tsd_first = 1;
+ setContext(mainExecutableMH, argc, argv, envp, apple);
// Pickup the pointer to the exec path.
sExecPath = apple[0];
@@ -1998,7 +2798,6 @@
// we want any i386 dylibs (e.g. any used by Rosetta) to not load in the shared region
// because the shared region is being used by ppc dylibs
gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
- sExecPath = strdup(apple[0] + strlen(apple[0]) + 1);
ignoreEnvironmentVariables = true;
}
#endif
@@ -2016,7 +2815,8 @@
}
uintptr_t result = 0;
sMainExecutableMachHeader = mainExecutableMH;
- if ( issetugid() )
+ sMainExecutableIsSetuid = issetugid();
+ if ( sMainExecutableIsSetuid )
pruneEnvironmentVariables(envp, &apple);
else
checkEnvironmentVariables(envp, ignoreEnvironmentVariables);
@@ -2025,75 +2825,69 @@
if ( sEnv.DYLD_PRINT_ENV )
printEnvironmentVariables(envp);
getHostInfo();
- 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
+ // install gdb notifier
+ stateToHandlers(dyld_image_state_dependents_mapped, sBatchHandlers)->push_back(notifyGDB);
+ // make initial allocations large enough that it is unlikely to need to be re-alloced
+ sAllImages.reserve(200);
+ sImageRoots.reserve(16);
+ sAddImageCallbacks.reserve(4);
+ sRemoveImageCallbacks.reserve(4);
+ sImageFilesNeedingTermination.reserve(16);
+ sImageFilesNeedingDOFUnregistration.reserve(8);
+
try {
- sMainExecutable = instantiateFromLoadedImage(mainExecutableMH, sExecPath);
+ // instantiate ImageLoader for main executable
+ sMainExecutable = instantiateFromLoadedImage(mainExecutableMH, mainExecutableSlide, sExecPath);
+ sMainExecutable->setNeverUnload();
gLinkContext.mainExecutable = sMainExecutable;
+ // 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(sMainExecutable, bindness, ImageLoader::kDontRunInitializers);
result = (uintptr_t)sMainExecutable->getMain();
+
+ // 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));
+ }
+ }
+
+ #if SUPPORT_OLD_CRT_INITIALIZATION
+ // Old way is to run initializers via a callback from crt1.o
+ if ( ! gRunInitializersOldWay )
+ #endif
+ initializeMainExecutable(); // run all initializers
}
catch(const char* message) {
halt(message);
}
catch(...) {
- fprintf(stderr, "dyld: launch failed\n");
- }
-
-
- // Link in any inserted libraries.
- // Do this after linking 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);
- }
- }
- }
-
+ dyld::log("dyld: launch failed\n");
+ }
+
return result;
}