Loading...
--- dyld/dyld-551.3/src/dyld.cpp
+++ dyld/dyld-421.2/src/dyld.cpp
@@ -40,8 +40,6 @@
#include <sys/un.h>
#include <sys/syslog.h>
#include <sys/uio.h>
-#include <sys/xattr.h>
-#include <mach/mach.h>
#include <mach-o/fat.h>
#include <mach-o/loader.h>
#include <mach-o/ldsyms.h>
@@ -63,11 +61,7 @@
#include <sandbox.h>
#include <sandbox/private.h>
-extern "C" int __fork();
-
#include <array>
-#include <algorithm>
-#include <vector>
#ifndef CPU_SUBTYPE_ARM_V5TEJ
#define CPU_SUBTYPE_ARM_V5TEJ ((cpu_subtype_t) 7)
@@ -95,13 +89,12 @@
#define CPU_SUBTYPE_X86_64_H ((cpu_subtype_t) 8)
#endif
-#ifndef CPU_SUBTYPE_ARM64_E
- #define CPU_SUBTYPE_ARM64_E 2
-#endif
-
#ifndef VM_PROT_SLIDE
#define VM_PROT_SLIDE 0x20
#endif
+
+#include <vector>
+#include <algorithm>
#include "mach-o/dyld_gdb.h"
@@ -109,7 +102,9 @@
#include "ImageLoader.h"
#include "ImageLoaderMachO.h"
#include "dyldLibSystemInterface.h"
+#if DYLD_SHARED_CACHE_SUPPORT
#include "dyld_cache_format.h"
+#endif
#include "dyld_process_info_internal.h"
#include <coreSymbolicationDyldSupport.h>
#if TARGET_IPHONE_SIMULATOR
@@ -129,27 +124,13 @@
#include "dyldSyscallInterface.h"
#endif
-#include "LaunchCache.h"
-#include "libdyldEntryVector.h"
-#include "MachOParser.h"
-#include "Loading.h"
-#include "DyldSharedCache.h"
-#include "SharedCacheRuntime.h"
-#include "StringUtils.h"
-#include "Tracing.h"
-#include "DyldCacheParser.h"
-
-extern "C" {
- #include "closuredProtocol.h"
-}
-
// not libc header for send() syscall interface
extern "C" ssize_t __sendto(int, const void *, size_t, int, const struct sockaddr *, socklen_t);
// ARM and x86_64 are the only architecture that use cpu-sub-types
-#define CPU_SUBTYPES_SUPPORTED ((__arm__ || __arm64__ || __x86_64__) && !TARGET_IPHONE_SIMULATOR)
+#define CPU_SUBTYPES_SUPPORTED ((__arm__ || __x86_64__) && !TARGET_IPHONE_SIMULATOR)
#if __LP64__
#define LC_SEGMENT_COMMAND LC_SEGMENT_64
@@ -232,7 +213,8 @@
bool DYLD_PRINT_ENV;
bool DYLD_DISABLE_DOFS;
bool DYLD_PRINT_CS_NOTIFICATIONS;
- // DYLD_SHARED_CACHE_DIR ==> sSharedCacheOverrideDir
+ // 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
@@ -266,7 +248,6 @@
static const char* sExecPath = NULL;
static const char* sExecShortName = NULL;
static const macho_header* sMainExecutableMachHeader = NULL;
-static uintptr_t sMainExecutableSlide = 0;
#if CPU_SUBTYPES_SUPPORTED
static cpu_type_t sHostCPU;
static cpu_subtype_t sHostCPUsubtype;
@@ -288,17 +269,26 @@
#if __MAC_OS_X_VERSION_MIN_REQUIRED
static const char* sFrameworkFallbackPaths[] = { "$HOME/Library/Frameworks", "/Library/Frameworks", "/Network/Library/Frameworks", "/System/Library/Frameworks", NULL };
static const char* sLibraryFallbackPaths[] = { "$HOME/lib", "/usr/local/lib", "/usr/lib", NULL };
-static const char* sRestrictedFrameworkFallbackPaths[] = { "/System/Library/Frameworks", NULL };
-static const char* sRestrictedLibraryFallbackPaths[] = { "/usr/lib", NULL };
#else
static const char* sFrameworkFallbackPaths[] = { "/System/Library/Frameworks", NULL };
static const char* sLibraryFallbackPaths[] = { "/usr/local/lib", "/usr/lib", NULL };
#endif
+static const char* sRestrictedFrameworkFallbackPaths[] = { "/System/Library/Frameworks", NULL };
+static const char* sRestrictedLibraryFallbackPaths[] = { "/usr/lib", NULL };
static UndefinedHandler sUndefinedHandler = NULL;
static ImageLoader* sBundleBeingLoaded = NULL; // hack until OFI is reworked
-static dyld3::SharedCacheLoadInfo sSharedCacheLoadInfo;
-static const char* sSharedCacheOverrideDir;
- bool gSharedCacheOverridden = false;
+#if DYLD_SHARED_CACHE_SUPPORT
+static const dyld_cache_header* sSharedCache = NULL;
+static long sSharedCacheSlide = 0;
+static bool sSharedCacheIgnoreInodeAndTimeStamp = false;
+ bool gSharedCacheOverridden = false;
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ static const char* sSharedCacheDir = IPHONE_DYLD_SHARED_CACHE_DIR;
+ #define ENABLE_DYLIBS_TO_OVERRIDE_CACHE_SIZE 1024
+#else
+ static const char* sSharedCacheDir = MACOSX_DYLD_SHARED_CACHE_DIR;
+#endif
+#endif
ImageLoader::LinkContext gLinkContext;
bool gLogAPIs = false;
#if SUPPORT_ACCELERATE_TABLES
@@ -313,7 +303,7 @@
static int sLogSocket = -1;
#endif
static bool sFrameworksFoundAsDylibs = false;
-#if __x86_64__ && !TARGET_IPHONE_SIMULATOR
+#if __x86_64__ && DYLD_SHARED_CACHE_SUPPORT
static bool sHaswell = false;
#endif
static std::vector<ImageLoader::DynamicReference> sDynamicReferences;
@@ -322,7 +312,7 @@
static bool sLogToFile = false;
#endif
static char sLoadingCrashMessage[1024] = "dyld: launch, loading dependent libraries";
-static bool sSafeMode = false;
+
static _dyld_objc_notify_mapped sNotifyObjCMapped;
static _dyld_objc_notify_init sNotifyObjCInit;
static _dyld_objc_notify_unmapped sNotifyObjCUnmapped;
@@ -332,14 +322,11 @@
#endif
+
#if SUPPORT_ACCELERATE_TABLES
static ImageLoaderMegaDylib* sAllCacheImagesProxy = NULL;
static bool sDisableAcceleratorTables = false;
#endif
-
-bool gUseDyld3 = false;
-static bool sSkipMain = false;
-static bool sEnableClosures = false;
//
// The MappedRanges structure is used for fast address->image lookups.
@@ -570,8 +557,7 @@
va_end(list);
}
-#else
- extern void vlog(const char* format, va_list list);
+
#endif // !TARGET_IPHONE_SIMULATOR
@@ -769,19 +755,16 @@
#endif
static mach_port_t sNotifyReplyPorts[DYLD_MAX_PROCESS_INFO_NOTIFY_COUNT];
-static bool sZombieNotifiers[DYLD_MAX_PROCESS_INFO_NOTIFY_COUNT];
+
static void notifyMonitoringDyld(bool unloading, unsigned portSlot, unsigned imageCount, const dyld_image_info infos[])
{
- if ( sZombieNotifiers[portSlot] )
- return;
-
unsigned entriesSize = imageCount*sizeof(dyld_process_info_image_entry);
unsigned pathsSize = 0;
for (unsigned j=0; j < imageCount; ++j) {
pathsSize += (strlen(infos[j].imageFilePath) + 1);
}
- unsigned totalSize = (sizeof(dyld_process_info_notify_header) + MAX_TRAILER_SIZE + entriesSize + pathsSize + 127) & -128; // align
+ unsigned totalSize = (sizeof(dyld_process_info_notify_header) + entriesSize + pathsSize + 127) & -128; // align
if ( totalSize > DYLD_PROCESS_INFO_NOTIFY_MAX_BUFFER_SIZE ) {
// Putting all image paths into one message would make buffer too big.
// Instead split into two messages. Recurse as needed until paths fit in buffer.
@@ -796,7 +779,7 @@
header->imageCount = imageCount;
header->imagesOffset = sizeof(dyld_process_info_notify_header);
header->stringsOffset = sizeof(dyld_process_info_notify_header) + entriesSize;
- header->timestamp = dyld::gProcessInfo->infoArrayChangeTimestamp;
+ header->timestamp = mach_absolute_time();
dyld_process_info_image_entry* entries = (dyld_process_info_image_entry*)&buffer[header->imagesOffset];
char* const pathPoolStart = (char*)&buffer[header->stringsOffset];
char* pathPool = pathPoolStart;
@@ -839,7 +822,7 @@
h->msgh_reserved = 0;
h->msgh_size = (mach_msg_size_t)sizeof(buffer);
//dyld::log("sending to port[%d]=%d, size=%d, reply port=%d, id=0x%X\n", portSlot, dyld::gProcessInfo->notifyPorts[portSlot], h->msgh_size, sNotifyReplyPorts[portSlot], h->msgh_id);
- kern_return_t sendResult = mach_msg(h, MACH_SEND_MSG | MACH_RCV_MSG | MACH_RCV_TIMEOUT, h->msgh_size, h->msgh_size, sNotifyReplyPorts[portSlot], 5000, MACH_PORT_NULL);
+ kern_return_t sendResult = mach_msg(h, MACH_SEND_MSG | MACH_RCV_MSG | MACH_SEND_TIMEOUT, h->msgh_size, h->msgh_size, sNotifyReplyPorts[portSlot], 100, MACH_PORT_NULL);
//dyld::log("send result = 0x%X, msg_id=%d, msg_size=%d\n", sendResult, h->msgh_id, h->msgh_size);
if ( sendResult == MACH_SEND_INVALID_DEST ) {
// sender is not responding, detatch
@@ -849,61 +832,42 @@
dyld::gProcessInfo->notifyPorts[portSlot] = 0;
sNotifyReplyPorts[portSlot] = 0;
}
- else if ( sendResult == MACH_RCV_TIMED_OUT ) {
- // client took too long, ignore him from now on
- sZombieNotifiers[portSlot] = true;
- mach_port_deallocate(mach_task_self(), sNotifyReplyPorts[portSlot]);
- sNotifyReplyPorts[portSlot] = 0;
- }
-}
-
-static void notifyMonitoringDyldMain()
-{
- for (int slot=0; slot < DYLD_MAX_PROCESS_INFO_NOTIFY_COUNT; ++slot) {
- if ( (dyld::gProcessInfo->notifyPorts[slot] != 0 ) && !sZombieNotifiers[slot] ) {
- if ( sNotifyReplyPorts[slot] == 0 ) {
- if ( !mach_port_allocate(mach_task_self(), MACH_PORT_RIGHT_RECEIVE, &sNotifyReplyPorts[slot]) )
- mach_port_insert_right(mach_task_self(), sNotifyReplyPorts[slot], sNotifyReplyPorts[slot], MACH_MSG_TYPE_MAKE_SEND);
- //dyld::log("allocated reply port %d\n", sNotifyReplyPorts[slot]);
- }
- //dyld::log("found port to send to\n");
- uint8_t messageBuffer[sizeof(mach_msg_header_t) + MAX_TRAILER_SIZE];
- mach_msg_header_t* h = (mach_msg_header_t*)messageBuffer;
- h->msgh_bits = MACH_MSGH_BITS(MACH_MSG_TYPE_COPY_SEND,MACH_MSG_TYPE_MAKE_SEND); // MACH_MSG_TYPE_MAKE_SEND_ONCE
- h->msgh_id = DYLD_PROCESS_INFO_NOTIFY_MAIN_ID;
- h->msgh_local_port = sNotifyReplyPorts[slot];
- h->msgh_remote_port = dyld::gProcessInfo->notifyPorts[slot];
- h->msgh_reserved = 0;
- h->msgh_size = (mach_msg_size_t)sizeof(messageBuffer);
- //dyld::log("sending to port[%d]=%d, size=%d, reply port=%d, id=0x%X\n", slot, dyld::gProcessInfo->notifyPorts[slot], h->msgh_size, sNotifyReplyPorts[slot], h->msgh_id);
- kern_return_t sendResult = mach_msg(h, MACH_SEND_MSG | MACH_RCV_MSG | MACH_RCV_TIMEOUT, h->msgh_size, h->msgh_size, sNotifyReplyPorts[slot], 5000, MACH_PORT_NULL);
- //dyld::log("send result = 0x%X, msg_id=%d, msg_size=%d\n", sendResult, h->msgh_id, h->msgh_size);
- if ( sendResult == MACH_SEND_INVALID_DEST ) {
- // sender is not responding, detatch
- //dyld::log("process requesting notification gone. deallocation send port %d and receive port %d\n", dyld::gProcessInfo->notifyPorts[slot], sNotifyReplyPorts[slot]);
- mach_port_deallocate(mach_task_self(), dyld::gProcessInfo->notifyPorts[slot]);
- mach_port_deallocate(mach_task_self(), sNotifyReplyPorts[slot]);
- dyld::gProcessInfo->notifyPorts[slot] = 0;
- sNotifyReplyPorts[slot] = 0;
- }
- else if ( sendResult == MACH_RCV_TIMED_OUT ) {
- // client took too long, ignore him from now on
- sZombieNotifiers[slot] = true;
- mach_port_deallocate(mach_task_self(), sNotifyReplyPorts[slot]);
- sNotifyReplyPorts[slot] = 0;
- }
- }
- }
+}
+
+#define MAX_KERNEL_IMAGES_PER_CALL (100)
+
+static void flushKernelNotifications(bool loading, bool force, std::array<dyld_kernel_image_info_t,MAX_KERNEL_IMAGES_PER_CALL>& kernelInfos, uint32_t &kernelInfoCount) {
+ if ((force && kernelInfoCount != 0) || kernelInfoCount == MAX_KERNEL_IMAGES_PER_CALL) {
+ if (loading) {
+ task_register_dyld_image_infos(mach_task_self(), kernelInfos.data(), kernelInfoCount);
+ } else {
+ task_unregister_dyld_image_infos(mach_task_self(), kernelInfos.data(), kernelInfoCount);
+ }
+ kernelInfoCount = 0;
+ }
+}
+
+static
+void queueKernelNotification(const ImageLoader& image, bool loading, std::array<dyld_kernel_image_info_t,MAX_KERNEL_IMAGES_PER_CALL>& kernelInfos, uint32_t &kernelInfoCount) {
+ if ( !image.inSharedCache() ) {
+ ino_t inode = image.getInode();
+ image.getUUID(kernelInfos[kernelInfoCount].uuid);
+ memcpy(&kernelInfos[kernelInfoCount].fsobjid, &inode, 8);
+ kernelInfos[kernelInfoCount].load_addr = (uint64_t)image.machHeader();
+ // FIXME we should also be grabbing the device ID, but that is not necessary yet,
+ // and requires threading it through the ImageLoader
+ kernelInfos[kernelInfoCount].fsid.val[0] = 0;
+ kernelInfos[kernelInfoCount].fsid.val[1] = 0;
+ kernelInfoCount++;
+ }
+ flushKernelNotifications(loading, false, kernelInfos, kernelInfoCount);
}
void notifyKernel(const ImageLoader& image, bool loading) {
- if ( !image.inSharedCache() ) {
- uint32_t baseCode = loading ? DBG_DYLD_UUID_MAP_A : DBG_DYLD_UUID_UNMAP_A;
- uuid_t uuid;
- ino_t inode = image.getInode();
- image.getUUID(uuid);
- dyld3::kdebug_trace_dyld_image(baseCode, (const uuid_t *)&uuid, *(fsobj_id_t*)&inode, {{ image.getDevice(), 0 }}, image.machHeader());
- }
+ std::array<dyld_kernel_image_info_t,MAX_KERNEL_IMAGES_PER_CALL> kernelInfos;
+ uint32_t kernelInfoCount = 0;
+ queueKernelNotification(image, loading, kernelInfos, kernelInfoCount);
+ flushKernelNotifications(loading, true, kernelInfos, kernelInfoCount);
}
static void notifySingle(dyld_image_states state, const ImageLoader* image, ImageLoader::InitializerTimingList* timingInfo)
@@ -971,7 +935,6 @@
//dyld::log("deallocated reply port %d\n", sNotifyReplyPorts[slot]);
mach_port_deallocate(mach_task_self(), sNotifyReplyPorts[slot]);
sNotifyReplyPorts[slot] = 0;
- sZombieNotifiers[slot] = false;
}
}
}
@@ -1027,6 +990,9 @@
static void notifyBatchPartial(dyld_image_states state, bool orLater, dyld_image_state_change_handler onlyHandler, bool preflightOnly, bool onlyObjCMappedNotification)
{
std::vector<dyld_image_state_change_handler>* handlers = stateToHandlers(state, sBatchHandlers);
+ std::array<dyld_kernel_image_info_t,MAX_KERNEL_IMAGES_PER_CALL> kernelInfos;
+ uint32_t kernelInfoCount = 0;
+
if ( (handlers != NULL) || ((state == dyld_image_state_bound) && (sNotifyObjCMapped != NULL)) ) {
// don't use a vector because it will use malloc/free and we want notifcation to be low cost
allImagesLock();
@@ -1058,11 +1024,12 @@
p->imageFileModDate = image->lastModified();
// get these registered with the kernel as early as possible
if ( state == dyld_image_state_dependents_mapped)
- notifyKernel(*image, true);
+ queueKernelNotification(*image, true, kernelInfos, kernelInfoCount);
// special case for add_image hook
if ( state == dyld_image_state_bound )
notifyAddImageCallbacks(image);
}
+ flushKernelNotifications(true, true, kernelInfos, kernelInfoCount);
}
#if SUPPORT_ACCELERATE_TABLES
if ( sAllCacheImagesProxy != NULL ) {
@@ -1071,7 +1038,7 @@
if ( state == dyld_image_state_bound ) {
for (ImageCallback callback : sAddImageCallbacks) {
for (unsigned i=0; i < cacheCount; ++i)
- (*callback)(infos[imageCount+i].imageLoadAddress, sSharedCacheLoadInfo.slide);
+ (*callback)(infos[imageCount+i].imageLoadAddress, sSharedCacheSlide);
}
}
imageCount += cacheCount;
@@ -1793,8 +1760,6 @@
}
#endif
-
-
static void printOptions(const char* argv[])
{
uint32_t i = 0;
@@ -1938,7 +1903,7 @@
else if ( strcmp(key, "DYLD_PRINT_CODE_SIGNATURES") == 0 ) {
gLinkContext.verboseCodeSignatures = true;
}
- else if ( (strcmp(key, "DYLD_SHARED_REGION") == 0) && !sSafeMode ) {
+ else if ( strcmp(key, "DYLD_SHARED_REGION") == 0 ) {
if ( strcmp(value, "private") == 0 ) {
gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
}
@@ -1955,13 +1920,14 @@
dyld::warn("unknown option to DYLD_SHARED_REGION. Valid options are: use, private, avoid\n");
}
}
- else if ( (strcmp(key, "DYLD_SHARED_CACHE_DIR") == 0) && !sSafeMode ) {
- sSharedCacheOverrideDir = value;
- }
- else if ( strcmp(key, "DYLD_USE_CLOSURES") == 0 ) {
- if ( dyld3::loader::internalInstall() )
- sEnableClosures = true;
- }
+#if DYLD_SHARED_CACHE_SUPPORT
+ else if ( strcmp(key, "DYLD_SHARED_CACHE_DIR") == 0 ) {
+ sSharedCacheDir = value;
+ }
+ else if ( strcmp(key, "DYLD_SHARED_CACHE_DONT_VALIDATE") == 0 ) {
+ sSharedCacheIgnoreInodeAndTimeStamp = true;
+ }
+#endif
else if ( strcmp(key, "DYLD_IGNORE_PREBINDING") == 0 ) {
if ( strcmp(value, "all") == 0 ) {
gLinkContext.prebindUsage = ImageLoader::kUseNoPrebinding;
@@ -1994,7 +1960,7 @@
}
#endif
#if !TARGET_IPHONE_SIMULATOR
- else if ( (strcmp(key, "DYLD_PRINT_TO_FILE") == 0) && (mainExecutableDir == NULL) && !sSafeMode ) {
+ else if ( (strcmp(key, "DYLD_PRINT_TO_FILE") == 0) && (mainExecutableDir == NULL) ) {
int fd = open(value, O_WRONLY | O_CREAT | O_APPEND, 0644);
if ( fd != -1 ) {
sLogfile = fd;
@@ -2003,10 +1969,6 @@
else {
dyld::log("dyld: could not open DYLD_PRINT_TO_FILE='%s', errno=%d\n", value, errno);
}
- }
- else if ( (strcmp(key, "DYLD_SKIP_MAIN") == 0)) {
- if ( dyld3::loader::internalInstall() )
- sSkipMain = true;
}
#endif
else {
@@ -2107,17 +2069,10 @@
checkLoadCommandEnvironmentVariables();
#endif
- // Are we testing dyld on an internal config?
- if ( _simple_getenv(envp, "DYLD_SKIP_MAIN") != NULL ) {
- if ( dyld3::loader::internalInstall() )
- sSkipMain = true;
- }
-
// 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;
}
@@ -2225,7 +2180,7 @@
#endif
}
-#if __x86_64__ && !TARGET_IPHONE_SIMULATOR
+#if __x86_64__ && DYLD_SHARED_CACHE_SUPPORT
static bool isGCProgram(const macho_header* mh, uintptr_t slide)
{
const uint32_t cmd_count = mh->ncmds;
@@ -2273,12 +2228,6 @@
#elif __ARM_ARCH_7S__
sHostCPU = CPU_TYPE_ARM;
sHostCPUsubtype = CPU_SUBTYPE_ARM_V7S;
-#elif __arm64e__
- sHostCPU = CPU_TYPE_ARM64;
- sHostCPUsubtype = CPU_SUBTYPE_ARM64_E;
-#elif __arm64__
- sHostCPU = CPU_TYPE_ARM64;
- sHostCPUsubtype = CPU_SUBTYPE_ARM64_V8;
#else
struct host_basic_info info;
mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
@@ -2290,10 +2239,7 @@
sHostCPUsubtype = info.cpu_subtype;
mach_port_deallocate(mach_task_self(), hostPort);
#if __x86_64__
- // host_info returns CPU_TYPE_I386 even for x86_64. Override that here so that
- // we don't need to mask the cpu type later.
- sHostCPU = CPU_TYPE_X86_64;
- #if !TARGET_IPHONE_SIMULATOR
+ #if DYLD_SHARED_CACHE_SUPPORT
sHaswell = (sHostCPUsubtype == CPU_SUBTYPE_X86_64_H);
// <rdar://problem/18528074> x86_64h: Fall back to the x86_64 slice if an app requires GC.
if ( sHaswell ) {
@@ -2310,21 +2256,12 @@
#endif
}
-static void checkSharedRegionDisable(const mach_header* mainExecutableMH)
+static void checkSharedRegionDisable()
{
#if __MAC_OS_X_VERSION_MIN_REQUIRED
- // if main executable has segments that overlap the shared region,
+ // if main executable has segments that overlap the shared region,
// then disable using the shared region
- dyld3::MachOParser parser(mainExecutableMH);
- uintptr_t slide = parser.getSlide();
- dyld3::launch_cache::MemoryRange sharedRegion = { (void*)(long)(SHARED_REGION_BASE), SHARED_REGION_SIZE };
- __block bool disable = false;
- parser.forEachSegment(^(const char *segName, uint32_t fileOffset, uint32_t fileSize, uint64_t vmAddr, uint64_t vmSize, uint8_t protections, bool &stop) {
- dyld3::launch_cache::MemoryRange segRegion = { (void*)(long)(vmAddr+slide), vmSize };
- if ( segRegion.intersects(sharedRegion) )
- disable = true;
- });
- if ( disable ) {
+ 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");
@@ -2336,7 +2273,7 @@
}
#endif
#endif
- // iOS cannot run without shared region
+ // iPhoneOS cannot run without shared region
}
bool validImage(const ImageLoader* possibleImage)
@@ -2534,21 +2471,6 @@
};
#endif
-#if __arm64__
-//
-// ARM64 sub-type lists
-//
-const int kARM64_RowCount = 2;
-static const cpu_subtype_t kARM64[kARM64_RowCount][4] = {
-
- // armv64e can run: 64e, 64
- { CPU_SUBTYPE_ARM64_E, CPU_SUBTYPE_ARM64_V8, CPU_SUBTYPE_ARM64_ALL, CPU_SUBTYPE_END_OF_LIST },
-
- // armv64 can run: 64
- { CPU_SUBTYPE_ARM64_V8, CPU_SUBTYPE_ARM64_ALL, CPU_SUBTYPE_END_OF_LIST },
-};
-#endif
-
#if __x86_64__
//
// x86_64 sub-type lists
@@ -2557,10 +2479,10 @@
static const cpu_subtype_t kX86_64[kX86_64_RowCount][5] = {
// x86_64h can run: x86_64h, x86_64h(lib), x86_64(lib), and x86_64
- { CPU_SUBTYPE_X86_64_H, (cpu_subtype_t)(CPU_SUBTYPE_LIB64|CPU_SUBTYPE_X86_64_H), (cpu_subtype_t)(CPU_SUBTYPE_LIB64|CPU_SUBTYPE_X86_64_ALL), CPU_SUBTYPE_X86_64_ALL, CPU_SUBTYPE_END_OF_LIST },
+ { CPU_SUBTYPE_X86_64_H, CPU_SUBTYPE_LIB64|CPU_SUBTYPE_X86_64_H, CPU_SUBTYPE_LIB64|CPU_SUBTYPE_X86_64_ALL, CPU_SUBTYPE_X86_64_ALL, CPU_SUBTYPE_END_OF_LIST },
// x86_64 can run: x86_64(lib) and x86_64
- { CPU_SUBTYPE_X86_64_ALL, (cpu_subtype_t)(CPU_SUBTYPE_LIB64|CPU_SUBTYPE_X86_64_ALL), CPU_SUBTYPE_END_OF_LIST },
+ { CPU_SUBTYPE_X86_64_ALL, CPU_SUBTYPE_LIB64|CPU_SUBTYPE_X86_64_ALL, CPU_SUBTYPE_END_OF_LIST },
};
#endif
@@ -2575,14 +2497,6 @@
for (int i=0; i < kARM_RowCount ; ++i) {
if ( kARM[i][0] == subtype )
return kARM[i];
- }
- break;
-#endif
-#if __arm64__
- case CPU_TYPE_ARM64:
- for (int i=0; i < kARM64_RowCount ; ++i) {
- if ( kARM64[i][0] == subtype )
- return kARM64[i];
}
break;
#endif
@@ -2643,15 +2557,6 @@
#if __arm__
case CPU_TYPE_ARM:
if ( (cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == CPU_SUBTYPE_ARM_ALL ) {
- *offset = OSSwapBigToHostInt32(archs[i].offset);
- *len = OSSwapBigToHostInt32(archs[i].size);
- return true;
- }
- break;
-#endif
-#if __arm64__
- case CPU_TYPE_ARM64:
- if ( (cpu_subtype_t)OSSwapBigToHostInt32(archs[i].cpusubtype) == CPU_SUBTYPE_ARM64_ALL ) {
*offset = OSSwapBigToHostInt32(archs[i].offset);
*len = OSSwapBigToHostInt32(archs[i].size);
return true;
@@ -2750,7 +2655,7 @@
const cpu_type_t cpu = sMainExecutableMachHeader->cputype;
// We only know the subtype to use if the main executable cpu type matches the host
- if ( cpu == sHostCPU ) {
+ if ( (cpu & CPU_TYPE_MASK) == sHostCPU ) {
// get preference ordered list of subtypes
const cpu_subtype_t* subTypePreferenceList = findCPUSubtypeList(cpu, sHostCPUsubtype);
@@ -2796,7 +2701,7 @@
const mach_header* mh = (mach_header*)firstPage;
if ( mh->magic == sMainExecutableMachHeader->magic ) {
if ( mh->cputype == sMainExecutableMachHeader->cputype ) {
- if ( mh->cputype == sHostCPU ) {
+ if ( (mh->cputype & CPU_TYPE_MASK) == sHostCPU ) {
// get preference ordered list of subtypes that this machine can use
const cpu_subtype_t* subTypePreferenceList = findCPUSubtypeList(mh->cputype, sHostCPUsubtype);
if ( subTypePreferenceList != NULL ) {
@@ -2852,47 +2757,104 @@
throw "main executable not a known format";
}
-#if SUPPORT_ACCELERATE_TABLES
+#if DYLD_SHARED_CACHE_SUPPORT
+
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
static bool dylibsCanOverrideCache()
{
- if ( !dyld3::loader::internalInstall() )
+ uint32_t devFlags = *((uint32_t*)_COMM_PAGE_DEV_FIRM);
+ if ( (devFlags & 1) == 0 )
return false;
- return ( (sSharedCacheLoadInfo.loadAddress != nullptr) && (sSharedCacheLoadInfo.loadAddress->header.cacheType == kDyldSharedCacheTypeDevelopment) );
-}
-#endif
-
-const void* imMemorySharedCacheHeader()
-{
- return sSharedCacheLoadInfo.loadAddress;
-}
-
-
-const char* getStandardSharedCacheFilePath()
-{
- if ( sSharedCacheLoadInfo.loadAddress != nullptr )
- return sSharedCacheLoadInfo.path;
- else
- return nullptr;
-}
-
+ return ( (sSharedCache != NULL) && (sSharedCache->cacheType == kDyldSharedCacheTypeDevelopment) );
+}
+#endif
static bool findInSharedCacheImage(const char* path, bool searchByPath, const struct stat* stat_buf, const macho_header** mh, const char** pathInCache, long* slide)
{
- dyld3::SharedCacheFindDylibResults results;
- if ( dyld3::findInSharedCacheImage(sSharedCacheLoadInfo, path, &results) ) {
- *mh = (macho_header*)results.mhInCache;
- *pathInCache = results.pathInCache;
- *slide = results.slideInCache;
- return true;
+ if ( sSharedCache != NULL ) {
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
+ // Mac OS X always requires inode/mtime to valid cache
+ // if stat() not done yet, do it now
+ struct stat statb;
+ if ( stat_buf == NULL ) {
+ if ( my_stat(path, &statb) == -1 )
+ return false;
+ stat_buf = &statb;
+ }
+#endif
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ uint64_t hash = 0;
+ for (const char* s=path; *s != '\0'; ++s)
+ hash += hash*4 + *s;
+#endif
+
+ // walk shared cache to see if there is a cached image that matches the inode/mtime/path desired
+ const dyld_cache_image_info* const start = (dyld_cache_image_info*)((uint8_t*)sSharedCache + sSharedCache->imagesOffset);
+ const dyld_cache_image_info* const end = &start[sSharedCache->imagesCount];
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ const bool cacheHasHashInfo = (start->modTime == 0);
+#endif
+ for( const dyld_cache_image_info* p = start; p != end; ++p) {
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ // just check path
+ const char* aPath = (char*)sSharedCache + p->pathFileOffset;
+ if ( cacheHasHashInfo && (p->inode != hash) )
+ continue;
+ if ( strcmp(path, aPath) == 0 ) {
+ // found image in cache
+ *mh = (macho_header*)(p->address+sSharedCacheSlide);
+ *pathInCache = aPath;
+ *slide = sSharedCacheSlide;
+ if ( aPath < (char*)(*mh) ) {
+ // <rdar://problem/22056997> found alias, rescan list to get canonical name
+ for (const dyld_cache_image_info* p2 = start; p2 != end; ++p2) {
+ if ( p2->address == p->address ) {
+ *pathInCache = (char*)sSharedCache + p2->pathFileOffset;
+ break;
+ }
+ }
+ }
+ return true;
+ }
+#elif __MAC_OS_X_VERSION_MIN_REQUIRED
+ // check mtime and inode first because it is fast
+ bool inodeMatch = ( ((time_t)p->modTime == stat_buf->st_mtime) && ((ino_t)p->inode == stat_buf->st_ino) );
+ if ( searchByPath || sSharedCacheIgnoreInodeAndTimeStamp || inodeMatch ) {
+ // mod-time and inode match an image in the shared cache, now check path
+ const char* aPath = (char*)sSharedCache + p->pathFileOffset;
+ bool cacheHit = (strcmp(path, aPath) == 0);
+ if ( inodeMatch && !cacheHit ) {
+ // path does not match install name of dylib in cache, but inode and mtime does match
+ // perhaps path is a symlink to the cached dylib
+ struct stat pathInCacheStatBuf;
+ if ( my_stat(aPath, &pathInCacheStatBuf) != -1 )
+ cacheHit = ( (pathInCacheStatBuf.st_dev == stat_buf->st_dev) && (pathInCacheStatBuf.st_ino == stat_buf->st_ino) );
+ }
+ if ( 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=%s\n",
+ // *mh, p->address, sSharedCacheSlide, aPath);
+ *pathInCache = aPath;
+ *slide = sSharedCacheSlide;
+ return true;
+ }
+ }
+#endif
+ }
}
return false;
}
bool inSharedCache(const char* path)
{
- return dyld3::pathIsInSharedCacheImage(sSharedCacheLoadInfo, path);
-}
-
+ const macho_header* mhInCache;
+ const char* pathInCache;
+ long slide;
+ return findInSharedCacheImage(path, true, NULL, &mhInCache, &pathInCache, &slide);
+}
+
+#endif
static ImageLoader* checkandAddImage(ImageLoader* image, const LoadContext& context)
{
@@ -2984,7 +2946,7 @@
// min mach-o file is 4K
if ( fileLength < 4096 ) {
- if ( pread(fd, firstPages, (size_t)fileLength, 0) != (ssize_t)fileLength )
+ if ( pread(fd, firstPages, fileLength, 0) != (ssize_t)fileLength )
throwf("pread of short file failed: %d", errno);
shortPage = true;
}
@@ -3110,99 +3072,143 @@
}
+#if __MAC_OS_X_VERSION_MIN_REQUIRED
+static ImageLoader* loadPhase5load(const char* path, const char* orgPath, const LoadContext& context, unsigned& cacheIndex, std::vector<const char*>* exceptions)
+{
+ //dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
+ ImageLoader* image = NULL;
+
+ #if SUPPORT_ACCELERATE_TABLES
+ if ( sAllCacheImagesProxy != NULL ) {
+ unsigned index;
+ if ( sAllCacheImagesProxy->hasDylib(path, &index) )
+ return sAllCacheImagesProxy;
+ }
+ #endif
+
+ // just return NULL if file not found, but record any other errors
+ struct stat stat_buf;
+ if ( my_stat(path, &stat_buf) == -1 ) {
+ int err = errno;
+ if ( err != ENOENT ) {
+ if ( (err == EPERM) && sandboxBlockedStat(path) )
+ exceptions->push_back(dyld::mkstringf("%s: file system sandbox blocked stat()", path));
+ else
+ exceptions->push_back(dyld::mkstringf("%s: stat() failed with errno=%d", path, err));
+ }
+ return NULL;
+ }
+
+ // in case image was renamed or found via symlinks, check for inode match
+ image = findLoadedImage(stat_buf);
+ if ( image != NULL )
+ return image;
+
+ // do nothing if not already loaded and if RTLD_NOLOAD or NSADDIMAGE_OPTION_RETURN_ONLY_IF_LOADED
+ if ( context.dontLoad )
+ return NULL;
+
+#if DYLD_SHARED_CACHE_SUPPORT
+ // see if this image is in shared cache
+ const macho_header* mhInCache;
+ const char* pathInCache;
+ long slideInCache;
+ if ( findInSharedCacheImage(path, false, &stat_buf, &mhInCache, &pathInCache, &slideInCache) ) {
+ image = ImageLoaderMachO::instantiateFromCache(mhInCache, pathInCache, slideInCache, stat_buf, gLinkContext);
+ return checkandAddImage(image, context);
+ }
+#endif
+ // file exists and is not in dyld shared cache, so open it
+ return loadPhase5open(path, context, stat_buf, exceptions);
+}
+#endif // __MAC_OS_X_VERSION_MIN_REQUIRED
+
+
+
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+static ImageLoader* loadPhase5stat(const char* path, const LoadContext& context, struct stat* stat_buf,
+ int* statErrNo, bool* imageFound, std::vector<const char*>* exceptions)
+{
+ ImageLoader* image = NULL;
+ *imageFound = false;
+ *statErrNo = 0;
+ if ( my_stat(path, stat_buf) == 0 ) {
+ // in case image was renamed or found via symlinks, check for inode match
+ image = findLoadedImage(*stat_buf);
+ if ( image != NULL ) {
+ *imageFound = true;
+ return image;
+ }
+ // do nothing if not already loaded and if RTLD_NOLOAD
+ if ( context.dontLoad ) {
+ *imageFound = true;
+ return NULL;
+ }
+ image = loadPhase5open(path, context, *stat_buf, exceptions);
+ if ( image != NULL ) {
+ *imageFound = true;
+ return image;
+ }
+ }
+ else {
+ *statErrNo = errno;
+ }
+ return NULL;
+}
// try to open file
static ImageLoader* loadPhase5load(const char* path, const char* orgPath, const LoadContext& context, unsigned& cacheIndex, std::vector<const char*>* exceptions)
{
//dyld::log("%s(%s, %p)\n", __func__ , path, exceptions);
-#if SUPPORT_ACCELERATE_TABLES
+ struct stat stat_buf;
+ bool imageFound;
+ int statErrNo;
+ ImageLoader* image;
+#if DYLD_SHARED_CACHE_SUPPORT
+ #if SUPPORT_ACCELERATE_TABLES
if ( sAllCacheImagesProxy != NULL ) {
if ( sAllCacheImagesProxy->hasDylib(path, &cacheIndex) )
return sAllCacheImagesProxy;
}
-#endif
-#if TARGET_IPHONE_SIMULATOR
- // in simulators, 'path' has DYLD_ROOT_PATH prepended, but cache index does not have the prefix, so use orgPath
- const char* pathToFindInCache = orgPath;
-#else
- const char* pathToFindInCache = path;
-#endif
- uint statErrNo;
- struct stat statBuf;
- bool didStat = false;
- bool existsOnDisk;
- dyld3::SharedCacheFindDylibResults shareCacheResults;
- if ( dyld3::findInSharedCacheImage(sSharedCacheLoadInfo, pathToFindInCache, &shareCacheResults) ) {
+ #endif
+ if ( dylibsCanOverrideCache() ) {
+ // flag is set that allows installed framework roots to override dyld shared cache
+ image = loadPhase5stat(path, context, &stat_buf, &statErrNo, &imageFound, exceptions);
+ if ( imageFound )
+ return image;
+ }
+ // see if this image is in shared cache
+ const macho_header* mhInCache;
+ const char* pathInCache;
+ long slideInCache;
+ if ( findInSharedCacheImage(path, true, NULL, &mhInCache, &pathInCache, &slideInCache) ) {
// see if this image in the cache was already loaded via a different path
for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); ++it) {
ImageLoader* anImage = *it;
- if ( (const mach_header*)anImage->machHeader() == shareCacheResults.mhInCache )
+ if ( (const macho_header*)anImage->machHeader() == mhInCache )
return anImage;
}
- // if RTLD_NOLOAD, do nothing if not already loaded
- if ( context.dontLoad ) {
- // <rdar://33412890> possible that there is an override of cache
- if ( my_stat(path, &statBuf) == 0 ) {
- ImageLoader* imageLoader = findLoadedImage(statBuf);
- if ( imageLoader != NULL )
- return imageLoader;
- }
- return NULL;
- }
- bool useCache = false;
- if ( shareCacheResults.imageData == nullptr ) {
- // HACK to support old caches
- existsOnDisk = ( my_stat(path, &statBuf) == 0 );
- didStat = true;
- statErrNo = errno;
- useCache = !existsOnDisk;
- }
- else {
- // <rdar://problem/7014995> zero out stat buffer so mtime, etc are zero for items from the shared cache
- bzero(&statBuf, sizeof(statBuf));
- dyld3::launch_cache::Image image(shareCacheResults.imageData);
- if ( image.overridableDylib() ) {
- existsOnDisk = ( my_stat(path, &statBuf) == 0 );
- didStat = true;
- statErrNo = errno;
- if ( sSharedCacheLoadInfo.loadAddress->header.dylibsExpectedOnDisk ) {
- if ( (image.fileModTime() == statBuf.st_mtime) && (image.fileINode() == statBuf.st_ino) )
- useCache = true;
- }
- else {
- if ( !existsOnDisk )
- useCache = true;
- }
- }
- else {
- useCache = true;
- }
- }
- if ( useCache ) {
- ImageLoader* imageLoader = ImageLoaderMachO::instantiateFromCache((macho_header*)shareCacheResults.mhInCache, shareCacheResults.pathInCache, shareCacheResults.slideInCache, statBuf, gLinkContext);
- return checkandAddImage(imageLoader, context);
- }
- }
-
- // not in cache or cache not usable
- if ( !didStat ) {
- existsOnDisk = ( my_stat(path, &statBuf) == 0 );
- statErrNo = errno;
- }
- if ( existsOnDisk ) {
- // in case image was renamed or found via symlinks, check for inode match
- ImageLoader* imageLoader = findLoadedImage(statBuf);
- if ( imageLoader != NULL )
- return imageLoader;
// do nothing if not already loaded and if RTLD_NOLOAD
if ( context.dontLoad )
return NULL;
- // try opening file
- imageLoader = loadPhase5open(path, context, statBuf, exceptions);
- if ( imageLoader != NULL )
- return imageLoader;
- }
-
+ // 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 ( !dylibsCanOverrideCache() ) {
+ // 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) ) {
if ( (statErrNo == EPERM) && sandboxBlockedStat(path) )
@@ -3212,6 +3218,8 @@
}
return NULL;
}
+#endif // __IPHONE_OS_VERSION_MIN_REQUIRED
+
// look for path match with existing loaded images
static ImageLoader* loadPhase5check(const char* path, const char* orgPath, const LoadContext& context)
@@ -3414,23 +3422,6 @@
return loadPhase4(path, orgPath, context, cacheIndex, exceptions);
}
-static ImageLoader* loadPhase2cache(const char* path, const char *orgPath, const LoadContext& context, unsigned& cacheIndex, std::vector<const char*>* exceptions) {
- ImageLoader* image = NULL;
-#if !TARGET_IPHONE_SIMULATOR
- if ( exceptions != NULL) {
- char resolvedPath[PATH_MAX];
- realpath(path, resolvedPath);
- int myerr = errno;
- // If realpath() resolves to a path which does not exist on disk, errno is set to ENOENT
- if ( (myerr == ENOENT) || (myerr == 0) )
- {
- image = loadPhase4(resolvedPath, orgPath, context, cacheIndex, exceptions);
- }
- }
-#endif
- return image;
-}
-
// try search paths
static ImageLoader* loadPhase2(const char* path, const char* orgPath, const LoadContext& context,
@@ -3450,9 +3441,6 @@
strcat(npath, frameworkPartialPath);
//dyld::log("dyld: fallback framework path used: %s() -> loadPhase4(\"%s\", ...)\n", __func__, npath);
image = loadPhase4(npath, orgPath, context, cacheIndex, exceptions);
- // Look in the cache if appropriate
- if ( image == NULL)
- image = loadPhase2cache(npath, orgPath, context, cacheIndex, exceptions);
if ( image != NULL )
return image;
}
@@ -3470,9 +3458,6 @@
strcat(libpath, libraryLeafName);
//dyld::log("dyld: fallback library path used: %s() -> loadPhase4(\"%s\", ...)\n", __func__, libpath);
image = loadPhase4(libpath, orgPath, context, cacheIndex, exceptions);
- // Look in the cache if appropriate
- if ( image == NULL)
- image = loadPhase2cache(libpath, orgPath, context, cacheIndex, exceptions);
if ( image != NULL )
return image;
}
@@ -3541,13 +3526,15 @@
return loadPhase1(path, orgPath, context, cacheIndex, exceptions);
}
-static bool cacheablePath(const char* path) {
- if (strncmp(path, "/usr/lib/", 9) == 0)
- return true;
- if (strncmp(path, "/System/Library/", 16) == 0)
- return true;
- return false;
-}
+#if DYLD_SHARED_CACHE_SUPPORT
+ static bool cacheablePath(const char* path) {
+ if (strncmp(path, "/usr/lib/", 9) == 0)
+ return true;
+ if (strncmp(path, "/System/Library/", 16) == 0)
+ return true;
+ return false;
+ }
+#endif
//
// Given all the DYLD_ environment variables, the general case for loading libraries
@@ -3588,10 +3575,32 @@
// try all path permutations and try open() until first success
std::vector<const char*> exceptions;
image = loadPhase0(path, orgPath, context, cacheIndex, &exceptions);
-#if !TARGET_IPHONE_SIMULATOR
+#if __IPHONE_OS_VERSION_MIN_REQUIRED && DYLD_SHARED_CACHE_SUPPORT && !TARGET_IPHONE_SIMULATOR
// <rdar://problem/16704628> support symlinks on disk to a path in dyld shared cache
- if ( image == NULL)
- image = loadPhase2cache(path, orgPath, context, cacheIndex, &exceptions);
+ if ( (image == NULL) && cacheablePath(path) && !context.dontLoad ) {
+ char resolvedPath[PATH_MAX];
+ realpath(path, resolvedPath);
+ int myerr = errno;
+ // If realpath() resolves to a path which does not exist on disk, errno is set to ENOENT
+ if ( (myerr == ENOENT) || (myerr == 0) )
+ {
+ // see if this image is in shared cache
+ const macho_header* mhInCache;
+ const char* pathInCache;
+ long slideInCache;
+ if ( findInSharedCacheImage(resolvedPath, false, NULL, &mhInCache, &pathInCache, &slideInCache) ) {
+ struct stat stat_buf;
+ bzero(&stat_buf, sizeof(stat_buf));
+ try {
+ image = ImageLoaderMachO::instantiateFromCache(mhInCache, pathInCache, slideInCache, stat_buf, gLinkContext);
+ image = checkandAddImage(image, context);
+ }
+ catch (...) {
+ image = NULL;
+ }
+ }
+ }
+ }
#endif
CRSetCrashLogMessage2(NULL);
if ( image != NULL ) {
@@ -3599,11 +3608,13 @@
for (std::vector<const char*>::iterator it = exceptions.begin(); it != exceptions.end(); ++it) {
free((void*)(*it));
}
+#if DYLD_SHARED_CACHE_SUPPORT
// if loaded image is not from cache, but original path is in cache
// set gSharedCacheOverridden flag to disable some ObjC optimizations
if ( !gSharedCacheOverridden && !image->inSharedCache() && image->isDylib() && cacheablePath(path) && inSharedCache(path) ) {
gSharedCacheOverridden = true;
}
+#endif
return image;
}
else if ( exceptions.size() == 0 ) {
@@ -3632,41 +3643,685 @@
-
+#if DYLD_SHARED_CACHE_SUPPORT
+
+
+
+#if __i386__
+ #define ARCH_NAME "i386"
+ #define ARCH_CACHE_MAGIC "dyld_v1 i386"
+#elif __x86_64__
+ #define ARCH_NAME "x86_64"
+ #define ARCH_CACHE_MAGIC "dyld_v1 x86_64"
+ #define ARCH_NAME_H "x86_64h"
+ #define ARCH_CACHE_MAGIC_H "dyld_v1 x86_64h"
+#elif __ARM_ARCH_5TEJ__
+ #define ARCH_NAME "armv5"
+ #define ARCH_CACHE_MAGIC "dyld_v1 armv5"
+#elif __ARM_ARCH_6K__
+ #define ARCH_NAME "armv6"
+ #define ARCH_CACHE_MAGIC "dyld_v1 armv6"
+#elif __ARM_ARCH_7F__
+ #define ARCH_NAME "armv7f"
+ #define ARCH_CACHE_MAGIC "dyld_v1 armv7f"
+#elif __ARM_ARCH_7K__
+ #define ARCH_NAME "armv7k"
+ #define ARCH_CACHE_MAGIC "dyld_v1 armv7k"
+#elif __ARM_ARCH_7A__
+ #define ARCH_NAME "armv7"
+ #define ARCH_CACHE_MAGIC "dyld_v1 armv7"
+#elif __ARM_ARCH_7S__
+ #define ARCH_NAME "armv7s"
+ #define ARCH_CACHE_MAGIC "dyld_v1 armv7s"
+#elif __arm64__
+ #define ARCH_NAME "arm64"
+ #define ARCH_CACHE_MAGIC "dyld_v1 arm64"
+#endif
+
+
+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 void rebaseChain(uint8_t* pageContent, uint16_t startOffset, uintptr_t slideAmount, const dyld_cache_slide_info2* slideInfo)
+{
+ const uintptr_t deltaMask = (uintptr_t)(slideInfo->delta_mask);
+ const uintptr_t valueMask = ~deltaMask;
+ const uintptr_t valueAdd = (uintptr_t)(slideInfo->value_add);
+ const unsigned deltaShift = __builtin_ctzll(deltaMask) - 2;
+
+ uint32_t pageOffset = startOffset;
+ uint32_t delta = 1;
+ while ( delta != 0 ) {
+ uint8_t* loc = pageContent + pageOffset;
+ uintptr_t rawValue = *((uintptr_t*)loc);
+ delta = (uint32_t)((rawValue & deltaMask) >> deltaShift);
+ uintptr_t value = (rawValue & valueMask);
+ if ( value != 0 ) {
+ value += valueAdd;
+ value += slideAmount;
+ }
+ *((uintptr_t*)loc) = value;
+ //dyld::log(" pageOffset=0x%03X, loc=%p, org value=0x%08llX, new value=0x%08llX, delta=0x%X\n", pageOffset, loc, (uint64_t)rawValue, (uint64_t)value, delta);
+ pageOffset += delta;
+ }
+}
+
+
+static void loadAndCheckCodeSignature(int fd, uint32_t count, const shared_file_mapping_np mappings[],
+ off_t codeSignatureOffset, size_t codeSignatureSize,
+ const void *firstPages, size_t firstPagesSize)
+{
+ // register code signature blob for whole dyld cache
+ fsignatures_t siginfo;
+ siginfo.fs_file_start = 0; // cache always starts at beginning of file
+ siginfo.fs_blob_start = (void*)codeSignatureOffset;
+ siginfo.fs_blob_size = codeSignatureSize;
+
+ int result = fcntl(fd, F_ADDFILESIGS_RETURN, &siginfo);
+ // <rdar://problem/12891874> don't warn in chrooted case because mapping syscall is about to fail too
+ if ( result == -1 ) {
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ throwf("code signature registration for shared cache failed with errno=%d\n", errno);
+#else
+ if ( gLinkContext.verboseMapping )
+ dyld::log("dyld: code signature registration for shared cache failed with errno=%d\n", errno);
+#endif
+ }
+ uint64_t codeSignedLength = siginfo.fs_file_start;
+ for (uint32_t i = 0; i < count; ++i) {
+ if ( (mappings[i].sfm_size > codeSignedLength) || (mappings[i].sfm_file_offset > (codeSignedLength - mappings[i].sfm_size)) )
+ throw "dyld shared cache mapping not covered by code signature";
+ }
+
+ void *fdata = xmmap(NULL, firstPagesSize, PROT_READ|PROT_EXEC, MAP_PRIVATE, fd, 0);
+ if ( fdata == MAP_FAILED )
+ throwf("mmap() errno=%d validating first page of shared cache", errno);
+ if ( memcmp(fdata, firstPages, firstPagesSize) != 0 )
+ throwf("mmap() page compare failed for shared cache");
+ munmap(fdata, firstPagesSize);
+}
+
+static int __attribute__((noinline)) _shared_region_map_and_slide_np(int fd, uint32_t count, const shared_file_mapping_np mappings[],
+ long slide, void* slideInfo, unsigned long slideInfoSize)
+{
+ 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::gProcessInfo->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;
+ }
+ }
+
+ // update all __DATA pages with slide info
+ const dyld_cache_slide_info* slideInfoHeader = (dyld_cache_slide_info*)slideInfo;
+ if ( slideInfoHeader->version == 2 ) {
+ const dyld_cache_slide_info2* slideHeader = (dyld_cache_slide_info2*)slideInfo;
+ const uint32_t page_size = slideHeader->page_size;
+ const uint16_t* page_starts = (uint16_t*)((long)(slideInfo) + slideHeader->page_starts_offset);
+ const uint16_t* page_extras = (uint16_t*)((long)(slideInfo) + slideHeader->page_extras_offset);
+ const uintptr_t dataPagesStart = mappings[1].sfm_address;
+ for (int i=0; i < slideHeader->page_starts_count; ++i) {
+ uint8_t* page = (uint8_t*)(long)(dataPagesStart + (page_size*i));
+ uint16_t pageEntry = page_starts[i];
+ //dyld::log("page[%d]: page_starts[i]=0x%04X\n", i, pageEntry);
+ if ( pageEntry == DYLD_CACHE_SLIDE_PAGE_ATTR_NO_REBASE )
+ continue;
+ if ( pageEntry & DYLD_CACHE_SLIDE_PAGE_ATTR_EXTRA ) {
+ uint16_t chainIndex = (pageEntry & 0x3FFF);
+ bool done = false;
+ while ( !done ) {
+ uint16_t info = page_extras[chainIndex];
+ uint16_t pageStartOffset = (info & 0x3FFF)*4;
+ //dyld::log(" chain[%d] pageOffset=0x%03X\n", chainIndex, pageStartOffset);
+ rebaseChain(page, pageStartOffset, slide, slideHeader);
+ done = (info & DYLD_CACHE_SLIDE_PAGE_ATTR_END);
+ ++chainIndex;
+ }
+ }
+ else {
+ uint32_t pageOffset = pageEntry * 4;
+ //dyld::log(" start pageOffset=0x%03X\n", pageOffset);
+ rebaseChain(page, pageOffset, slide, slideHeader);
+ }
+ }
+ }
+ else if ( slide != 0 ) {
+ const uintptr_t dataPagesStart = mappings[1].sfm_address;
+ const uint16_t* toc = (uint16_t*)((long)(slideInfoHeader) + slideInfoHeader->toc_offset);
+ const uint8_t* entries = (uint8_t*)((long)(slideInfoHeader) + slideInfoHeader->entries_offset);
+ for(uint32_t i=0; i < slideInfoHeader->toc_count; ++i) {
+ const uint8_t* entry = &entries[toc[i]*slideInfoHeader->entries_size];
+ const uint8_t* page = (uint8_t*)(long)(dataPagesStart + (4096*i));
+ //dyld::log("page=%p toc[%d]=%d entries=%p\n", page, i, toc[i], entry);
+ for(int j=0; j < 128; ++j) {
+ uint8_t b = entry[j];
+ //dyld::log(" entry[%d] = 0x%02X\n", j, b);
+ if ( b != 0 ) {
+ for(int k=0; k < 8; ++k) {
+ if ( b & (1<<k) ) {
+ uintptr_t* p = (uintptr_t*)(page + j*8*4 + k*4);
+ uintptr_t value = *p;
+ //dyld::log(" *%p was 0x%lX will be 0x%lX\n", p, value, value+sSharedCacheSlide);
+ *p = value + slide;
+ }
+ }
+ }
+ }
+ }
+ }
+
+ // succesfully mapped shared cache for just this process
+ gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
+
+ return 0;
+}
+
+
+const void* imMemorySharedCacheHeader()
+{
+ return sSharedCache;
+}
+
+const char* getStandardSharedCacheFilePath()
+{
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ return IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME;
+#else
+ #if __x86_64__
+ if ( sHaswell ) {
+ const char* path2 = MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME_H;
+ struct stat statBuf;
+ if ( my_stat(path2, &statBuf) == 0 )
+ return path2;
+ }
+ #endif
+ return MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME;
+#endif
+}
+
+int openSharedCacheFile()
+{
+ char path[MAXPATHLEN];
+ strlcpy(path, sSharedCacheDir, MAXPATHLEN);
+ strlcat(path, "/", MAXPATHLEN);
+#if __x86_64__
+ if ( sHaswell ) {
+ strlcat(path, DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME_H, MAXPATHLEN);
+ int fd = my_open(path, O_RDONLY, 0);
+ if ( fd != -1 ) {
+ if ( gLinkContext.verboseMapping )
+ dyld::log("dyld: Mapping%s shared cache from %s\n", (gLinkContext.sharedRegionMode == ImageLoader::kUsePrivateSharedRegion) ? " private": "", path);
+ return fd;
+ }
+ strlcpy(path, sSharedCacheDir, MAXPATHLEN);
+ }
+#endif
+ strlcat(path, DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME, MAXPATHLEN);
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ struct stat enableStatBuf;
+ struct stat devCacheStatBuf;
+ struct stat prodCacheStatBuf;
+ if ( ((my_stat(IPHONE_DYLD_SHARED_CACHE_DIR "enable-dylibs-to-override-cache", &enableStatBuf) == 0)
+ && (enableStatBuf.st_size < ENABLE_DYLIBS_TO_OVERRIDE_CACHE_SIZE)
+ && (my_stat(IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME DYLD_SHARED_CACHE_DEVELOPMENT_EXT, &devCacheStatBuf) == 0))
+ || (my_stat(IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME, &prodCacheStatBuf) != 0))
+ strlcat(path, DYLD_SHARED_CACHE_DEVELOPMENT_EXT, MAXPATHLEN);
+#endif
+ if ( gLinkContext.verboseMapping )
+ dyld::log("dyld: Mapping%s shared cache from %s\n", (gLinkContext.sharedRegionMode == ImageLoader::kUsePrivateSharedRegion) ? " private": "", path);
+ return my_open(path, O_RDONLY, 0);
+}
+
+
+static void getCacheBounds(uint32_t mappingsCount, const shared_file_mapping_np mappings[], uint64_t& lowAddress, uint64_t& highAddress)
+{
+ lowAddress = 0;
+ highAddress = 0;
+ for(uint32_t i=0; i < mappingsCount; ++i) {
+ if ( lowAddress == 0 ) {
+ lowAddress = mappings[i].sfm_address;
+ highAddress = mappings[i].sfm_address + mappings[i].sfm_size;
+ }
+ else {
+ if ( mappings[i].sfm_address < lowAddress )
+ lowAddress = mappings[i].sfm_address;
+ if ( (mappings[i].sfm_address + mappings[i].sfm_size) > highAddress )
+ highAddress = mappings[i].sfm_address + mappings[i].sfm_size;
+ }
+ }
+}
+
+static long pickCacheSlide(uint32_t mappingsCount, shared_file_mapping_np mappings[])
+{
+#if __x86_64__
+ // x86_64 has a two memory regions:
+ // 256MB at 0x00007FFF70000000
+ // 1024MB at 0x00007FFF80000000
+ // Some old shared caches have r/w region after rx region, so all regions slide within 1GB range
+ // Newer shared caches have r/w region based at 0x7FFF70000000 and r/o regions at 0x7FFF80000000, so each part has max slide
+ if ( (mappingsCount >= 3) && (mappings[1].sfm_init_prot == (VM_PROT_READ|VM_PROT_WRITE)) && (mappings[1].sfm_address == 0x00007FFF70000000) ) {
+ const uint64_t rwSize = mappings[1].sfm_size;
+ const uint64_t rwSlop = 0x10000000ULL - rwSize;
+ const uint64_t roSize = (mappings[2].sfm_address + mappings[2].sfm_size) - mappings[0].sfm_address;
+ const uint64_t roSlop = 0x40000000ULL - roSize;
+ const uint64_t space = (rwSlop < roSlop) ? rwSlop : roSlop;
+
+ // choose new random slide
+ long slide = (arc4random() % space) & (-4096);
+ //dyld::log("rwSlop=0x%0llX, roSlop=0x%0llX\n", rwSlop, roSlop);
+ //dyld::log("space=0x%0llX, slide=0x%0lX\n", space, slide);
+
+ // update mappings
+ for(uint32_t i=0; i < mappingsCount; ++i) {
+ mappings[i].sfm_address += slide;
+ }
+
+ return slide;
+ }
+ // else fall through to handle old style cache
+#endif
+ // get bounds of cache
+ uint64_t lowAddress;
+ uint64_t highAddress;
+ getCacheBounds(mappingsCount, mappings, lowAddress, highAddress);
+
+ // find slop space
+ const uint64_t space = (SHARED_REGION_BASE + SHARED_REGION_SIZE) - highAddress;
+
+ // choose new random slide
+#if __arm__
+ // <rdar://problem/20848977> change shared cache slide for 32-bit arm to always be 16k aligned
+ long slide = ((arc4random() % space) & (-16384));
+#else
+ long slide = dyld_page_trunc(arc4random() % space);
+#endif
+ //dyld::log("slideSpace=0x%0llX\n", space);
+ //dyld::log("slide=0x%0lX\n", slide);
+
+ // update mappings
+ for(uint32_t i=0; i < mappingsCount; ++i) {
+ mappings[i].sfm_address += slide;
+ }
+
+ return slide;
+}
static void mapSharedCache()
{
- dyld3::SharedCacheOptions opts;
- opts.cacheDirOverride = sSharedCacheOverrideDir;
- opts.forcePrivate = (gLinkContext.sharedRegionMode == ImageLoader::kUsePrivateSharedRegion);
-#if __x86_64__ && !TARGET_IPHONE_SIMULATOR
- opts.useHaswell = sHaswell;
+ uint64_t cacheBaseAddress = 0;
+ // quick check if a cache is already mapped into shared region
+ if ( _shared_region_check_np(&cacheBaseAddress) == 0 ) {
+ sSharedCache = (dyld_cache_header*)cacheBaseAddress;
+ // if we don't understand the currently mapped shared cache, then ignore
+#if __x86_64__
+ const char* magic = (sHaswell ? ARCH_CACHE_MAGIC_H : ARCH_CACHE_MAGIC);
#else
- opts.useHaswell = false;
-#endif
- opts.verbose = gLinkContext.verboseMapping;
- loadDyldCache(opts, &sSharedCacheLoadInfo);
-
- // update global state
- if ( sSharedCacheLoadInfo.loadAddress != nullptr ) {
- dyld::gProcessInfo->processDetachedFromSharedRegion = opts.forcePrivate;
- dyld::gProcessInfo->sharedCacheSlide = sSharedCacheLoadInfo.slide;
- dyld::gProcessInfo->sharedCacheBaseAddress = (unsigned long)sSharedCacheLoadInfo.loadAddress;
- sSharedCacheLoadInfo.loadAddress->getUUID(dyld::gProcessInfo->sharedCacheUUID);
- dyld3::kdebug_trace_dyld_image(DBG_DYLD_UUID_SHARED_CACHE_A, (const uuid_t *)&dyld::gProcessInfo->sharedCacheUUID[0], {0,0}, {{ 0, 0 }}, (const mach_header *)sSharedCacheLoadInfo.loadAddress);
- }
-
-//#if __IPHONE_OS_VERSION_MIN_REQUIRED && !TARGET_IPHONE_SIMULATOR
-// RAM disk booting does not have shared cache yet
-// Don't make lack of a shared cache fatal in that case
-// if ( sSharedCacheLoadInfo.loadAddress == nullptr ) {
-// if ( sSharedCacheLoadInfo.errorMessage != nullptr )
-// halt(sSharedCacheLoadInfo.errorMessage);
-// else
-// halt("error loading dyld shared cache");
-// }
-//#endif
-}
+ const char* magic = ARCH_CACHE_MAGIC;
+#endif
+ if ( strcmp(sSharedCache->magic, magic) != 0 ) {
+ sSharedCache = NULL;
+ if ( gLinkContext.verboseMapping ) {
+ dyld::log("dyld: existing shared cached in memory is not compatible\n");
+ return;
+ }
+ }
+ // check if cache file is slidable
+ const dyld_cache_header* header = sSharedCache;
+ if ( (header->mappingOffset >= 0x48) && (header->slideInfoSize != 0) ) {
+ // solve for slide by comparing loaded address to address of first region
+ const uint8_t* loadedAddress = (uint8_t*)sSharedCache;
+ const dyld_cache_mapping_info* const mappings = (dyld_cache_mapping_info*)(loadedAddress+header->mappingOffset);
+ const uint8_t* preferedLoadAddress = (uint8_t*)(long)(mappings[0].address);
+ sSharedCacheSlide = loadedAddress - preferedLoadAddress;
+ dyld::gProcessInfo->sharedCacheSlide = sSharedCacheSlide;
+ dyld::gProcessInfo->sharedCacheBaseAddress = cacheBaseAddress;
+ //dyld::log("sSharedCacheSlide=0x%08lX, loadedAddress=%p, preferedLoadAddress=%p\n", sSharedCacheSlide, loadedAddress, preferedLoadAddress);
+ }
+ // if cache has a uuid, copy it
+ if ( header->mappingOffset >= 0x68 ) {
+ memcpy(dyld::gProcessInfo->sharedCacheUUID, header->uuid, 16);
+ }
+ // verbose logging
+ if ( gLinkContext.verboseMapping ) {
+ dyld::log("dyld: re-using existing %s shared cache mapping\n", (header->cacheType == kDyldSharedCacheTypeDevelopment ? "development" : "production"));
+ }
+ if (header->mappingOffset >= 0x68) {
+ dyld_kernel_image_info_t kernelCacheInfo;
+ memcpy(&kernelCacheInfo.uuid[0], &sSharedCache->uuid[0], sizeof(uuid_t));
+ kernelCacheInfo.load_addr = (uint64_t)sSharedCache;
+ kernelCacheInfo.fsobjid.fid_objno = 0;
+ kernelCacheInfo.fsobjid.fid_generation = 0;
+ kernelCacheInfo.fsid.val[0] = 0;
+ kernelCacheInfo.fsid.val[0] = 0;
+ task_register_dyld_shared_cache_image_info(mach_task_self(), kernelCacheInfo, false, false);
+ }
+ }
+ else {
+#if __i386__ || __x86_64__
+ // <rdar://problem/5925940> Safe Boot should disable dyld shared cache
+ // if we are in safe-boot mode and the cache was not made during this boot cycle,
+ // delete the cache file
+ uint32_t safeBootValue = 0;
+ size_t safeBootValueSize = sizeof(safeBootValue);
+ if ( (sysctlbyname("kern.safeboot", &safeBootValue, &safeBootValueSize, NULL, 0) == 0) && (safeBootValue != 0) ) {
+ // user booted machine in safe-boot mode
+ struct stat dyldCacheStatInfo;
+ // Don't use custom DYLD_SHARED_CACHE_DIR if provided, use standard path
+ if ( my_stat(MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME, &dyldCacheStatInfo) == 0 ) {
+ struct timeval bootTimeValue;
+ size_t bootTimeValueSize = sizeof(bootTimeValue);
+ if ( (sysctlbyname("kern.boottime", &bootTimeValue, &bootTimeValueSize, NULL, 0) == 0) && (bootTimeValue.tv_sec != 0) ) {
+ // if the cache file was created before this boot, then throw it away and let it rebuild itself
+ if ( dyldCacheStatInfo.st_mtime < bootTimeValue.tv_sec ) {
+ ::unlink(MACOSX_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME);
+ gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
+ return;
+ }
+ }
+ }
+ }
+#endif
+ // map in shared cache to shared region
+ int fd = openSharedCacheFile();
+ if ( fd != -1 ) {
+ uint8_t firstPages[8192];
+ if ( ::read(fd, firstPages, 8192) == 8192 ) {
+ dyld_cache_header* header = (dyld_cache_header*)firstPages;
+ #if __x86_64__
+ const char* magic = (sHaswell ? ARCH_CACHE_MAGIC_H : ARCH_CACHE_MAGIC);
+ #else
+ const char* magic = ARCH_CACHE_MAGIC;
+ #endif
+ if ( strcmp(header->magic, magic) == 0 ) {
+ const dyld_cache_mapping_info* const fileMappingsStart = (dyld_cache_mapping_info*)&firstPages[header->mappingOffset];
+ const dyld_cache_mapping_info* const fileMappingsEnd = &fileMappingsStart[header->mappingCount];
+ #if __IPHONE_OS_VERSION_MIN_REQUIRED
+ if ( (header->mappingCount != 3)
+ || (header->mappingOffset > 256)
+ || (fileMappingsStart[0].fileOffset != 0)
+ || (fileMappingsStart[0].address != SHARED_REGION_BASE)
+ || ((fileMappingsStart[0].address + fileMappingsStart[0].size) > fileMappingsStart[1].address)
+ || ((fileMappingsStart[1].address + fileMappingsStart[1].size) > fileMappingsStart[2].address)
+ || ((fileMappingsStart[0].fileOffset + fileMappingsStart[0].size) != fileMappingsStart[1].fileOffset)
+ || ((fileMappingsStart[1].fileOffset + fileMappingsStart[1].size) != fileMappingsStart[2].fileOffset) )
+ throw "dyld shared cache file is invalid";
+ #endif
+ shared_file_mapping_np mappings[header->mappingCount];
+ unsigned int mappingCount = header->mappingCount;
+ int readWriteMappingIndex = -1;
+ int readOnlyMappingIndex = -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 ( (mappings[i].sfm_init_prot & (VM_PROT_READ|VM_PROT_WRITE)) == (VM_PROT_READ|VM_PROT_WRITE) ) {
+ readWriteMappingIndex = i;
+ }
+ if ( mappings[i].sfm_init_prot == VM_PROT_READ ) {
+ readOnlyMappingIndex = i;
+ }
+ }
+ // if shared cache is code signed, add a mapping for the code signature
+ uint64_t signatureSize = header->codeSignatureSize;
+ // zero size in header means signature runs to end-of-file
+ if ( signatureSize == 0 )
+ signatureSize = stat_buf.st_size - header->codeSignatureOffset;
+ if ( signatureSize != 0 ) {
+#if __arm__ || __arm64__
+ size_t alignedSignatureSize = (signatureSize+16383) & (-16384);
+#else
+ size_t alignedSignatureSize = (signatureSize+4095) & (-4096);
+#endif
+ // <rdar://problem/23188073> validate code signature covers entire shared cache
+ loadAndCheckCodeSignature(fd, mappingCount, mappings, header->codeSignatureOffset, alignedSignatureSize, firstPages, sizeof(firstPages));
+ }
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ else {
+ throw "dyld shared cache file not code signed";
+ }
+#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 ( my_stat("/usr/lib/libSystem.B.dylib", &stat_buf) == 0 ) {
+ const dyld_cache_image_info* images = (dyld_cache_image_info*)&firstPages[header->imagesOffset];
+ const dyld_cache_image_info* const imagesEnd = &images[header->imagesCount];
+ for (const dyld_cache_image_info* p = images; p < imagesEnd; ++p) {
+ if ( ((time_t)p->modTime == stat_buf.st_mtime) && ((ino_t)p->inode == stat_buf.st_ino) ) {
+ foundLibSystem = true;
+ break;
+ }
+ }
+ }
+ if ( !sSharedCacheIgnoreInodeAndTimeStamp && !foundLibSystem ) {
+ dyld::log("dyld: shared cached file was built against a different libSystem.dylib, ignoring cache.\n"
+ "to update dyld shared cache run: 'sudo update_dyld_shared_cache' then reboot.\n");
+ goodCache = false;
+ }
+ }
+#endif
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ {
+ uint64_t lowAddress;
+ uint64_t highAddress;
+ getCacheBounds(mappingCount, mappings, lowAddress, highAddress);
+ if ( (highAddress-lowAddress) > SHARED_REGION_SIZE )
+ throw "dyld shared cache is too big to fit in shared region";
+ }
+#endif
+
+ if ( goodCache && (readWriteMappingIndex == -1) ) {
+ dyld::log("dyld: shared cached file is missing read/write mapping: %s" DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME "\n", sSharedCacheDir);
+ goodCache = false;
+ }
+ if ( goodCache && (readOnlyMappingIndex == -1) ) {
+ dyld::log("dyld: shared cached file is missing read-only mapping: %s" DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME "\n", sSharedCacheDir);
+ goodCache = false;
+ }
+ if ( goodCache ) {
+ long cacheSlide = 0;
+ void* slideInfo = (void*)(long)(mappings[readOnlyMappingIndex].sfm_address + (header->slideInfoOffset - mappings[readOnlyMappingIndex].sfm_file_offset));;
+ uint64_t slideInfoSize = header->slideInfoSize;
+ // check if shared cache contains slid info
+ if ( 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*)((uint8_t*)slideInfo + cacheSlide);
+ // add VM_PROT_SLIDE bit to __DATA area of cache
+ mappings[readWriteMappingIndex].sfm_max_prot |= VM_PROT_SLIDE;
+ mappings[readWriteMappingIndex].sfm_init_prot |= VM_PROT_SLIDE;
+ }
+ if ( gLinkContext.verboseMapping ) {
+ dyld::log("dyld: calling _shared_region_map_and_slide_np() with regions:\n");
+ for (int i=0; i < mappingCount; ++i) {
+ dyld::log(" address=0x%08llX, size=0x%08llX, fileOffset=0x%08llX\n", mappings[i].sfm_address, mappings[i].sfm_size, mappings[i].sfm_file_offset);
+ }
+ }
+
+ if (_shared_region_map_and_slide_np(fd, mappingCount, mappings, cacheSlide, slideInfo, slideInfoSize) == 0) {
+ // successfully mapped cache into shared region
+ sSharedCache = (dyld_cache_header*)mappings[0].sfm_address;
+ sSharedCacheSlide = cacheSlide;
+ dyld::gProcessInfo->sharedCacheSlide = cacheSlide;
+ dyld::gProcessInfo->sharedCacheBaseAddress = mappings[0].sfm_address;
+ //dyld::log("sSharedCache=%p sSharedCacheSlide=0x%08lX\n", sSharedCache, sSharedCacheSlide);
+ // if cache has a uuid, copy it
+ if ( header->mappingOffset >= 0x68 ) {
+ const bool privateSharedCache = gLinkContext.sharedRegionMode == ImageLoader::kUsePrivateSharedRegion;
+ memcpy(dyld::gProcessInfo->sharedCacheUUID, header->uuid, 16);
+ dyld_kernel_image_info_t kernelCacheInfo;
+ memcpy(&kernelCacheInfo.uuid[0], &sSharedCache->uuid[0], sizeof(uuid_t));
+ kernelCacheInfo.load_addr = (uint64_t)sSharedCache;
+ kernelCacheInfo.fsobjid.fid_objno = 0;
+ kernelCacheInfo.fsobjid.fid_generation = 0;
+ kernelCacheInfo.fsid.val[0] = 0;
+ kernelCacheInfo.fsid.val[0] = 0;
+ if (privateSharedCache) {
+ kernelCacheInfo.fsobjid = *(fsobj_id_t*)(&stat_buf.st_ino);
+ struct statfs statfs_buf;
+ if ( fstatfs(fd, &statfs_buf) == 0 ) {
+ kernelCacheInfo.fsid = statfs_buf.f_fsid;
+ }
+ }
+ task_register_dyld_shared_cache_image_info(mach_task_self(), kernelCacheInfo, false, privateSharedCache);
+ }
+ }
+ else {
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
+ throwf("dyld shared cache could not be mapped. errno=%d, slide=0x%08lX, slideInfo=%p, slideInfoSize=0x%08llX, mappingCount=%u, "
+ "address/size/off/init/max [0]=0x%0llX/0x%0llX/0x%0llX/0x%02X/0x%02X, [1]=0x%0llX/0x%0llX/0x%0llX/0x%02X/0x%02X, [2]=0x%0llX/0x%0llX/0x%0llX/0x%02X/0x%02X",
+ errno, cacheSlide, slideInfo, slideInfoSize, mappingCount,
+ mappings[0].sfm_address, mappings[0].sfm_size, mappings[0].sfm_file_offset, mappings[0].sfm_init_prot, mappings[0].sfm_max_prot,
+ mappings[1].sfm_address, mappings[1].sfm_size, mappings[1].sfm_file_offset, mappings[1].sfm_init_prot, mappings[1].sfm_max_prot,
+ mappings[2].sfm_address, mappings[2].sfm_size, mappings[2].sfm_file_offset, mappings[2].sfm_init_prot, mappings[2].sfm_max_prot);
+#endif
+ 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;
+ 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 ( gLinkContext.verboseMapping ) {
+ // list the code blob
+ dyld_cache_header* header = (dyld_cache_header*)sSharedCache;
+ uint64_t signatureSize = header->codeSignatureSize;
+ // zero size in header means signature runs to end-of-file
+ if ( signatureSize == 0 ) {
+ struct stat stat_buf;
+ // FIXME: need size of cache file actually used
+ if ( my_stat(IPHONE_DYLD_SHARED_CACHE_DIR DYLD_SHARED_CACHE_BASE_NAME ARCH_NAME, &stat_buf) == 0 )
+ signatureSize = stat_buf.st_size - header->codeSignatureOffset;
+ }
+ if ( signatureSize != 0 ) {
+ const dyld_cache_mapping_info* const last = &start[dyld_shared_cache_ranges.sharedRegionsCount-1];
+ uint64_t codeBlobStart = last->address + last->size;
+ dyld::log(" 0x%08llX->0x%08llX (code signature)\n", codeBlobStart, codeBlobStart+signatureSize);
+ }
+ }
+ #if SUPPORT_ACCELERATE_TABLES
+ if ( !dylibsCanOverrideCache() && !sDisableAcceleratorTables && (sSharedCache->mappingOffset > 0x80) && (sSharedCache->accelerateInfoAddr != 0) ) {
+ sAllCacheImagesProxy = ImageLoaderMegaDylib::makeImageLoaderMegaDylib(sSharedCache, sSharedCacheSlide, gLinkContext);
+ }
+ #endif
+ }
+}
+#endif // #if DYLD_SHARED_CACHE_SUPPORT
@@ -3753,7 +4408,7 @@
dyld_image_info infos[allImagesCount()+1];
unsigned cacheCount = sAllCacheImagesProxy->appendImagesToNotify(dyld_image_state_bound, true, infos);
for (unsigned i=0; i < cacheCount; ++i) {
- (*func)(infos[i].imageLoadAddress, sSharedCacheLoadInfo.slide);
+ (*func)(infos[i].imageLoadAddress, sSharedCacheSlide);
}
}
#endif
@@ -4102,23 +4757,19 @@
catch (const char* msg) {
// ignore request to abort during registration
}
-
- // <rdar://problem/32209809> call 'init' function on all images already init'ed (below libSystem)
- for (std::vector<ImageLoader*>::iterator it=sAllImages.begin(); it != sAllImages.end(); it++) {
- ImageLoader* image = *it;
- if ( (image->getState() == dyld_image_state_initialized) && image->notifyObjC() ) {
- (*sNotifyObjCInit)(image->getRealPath(), image->machHeader());
- }
- }
}
bool sharedCacheUUID(uuid_t uuid)
{
- if ( sSharedCacheLoadInfo.loadAddress == nullptr )
+#if DYLD_SHARED_CACHE_SUPPORT
+ if ( sSharedCache == NULL )
return false;
- sSharedCacheLoadInfo.loadAddress->getUUID(uuid);
+ memcpy(uuid, sSharedCache->uuid, 16);
return true;
+#else
+ return false;
+#endif
}
#if SUPPORT_ACCELERATE_TABLES
@@ -4127,27 +4778,14 @@
{
if ( sAllCacheImagesProxy == NULL )
return false;
- char fallbackPath[PATH_MAX];
bool result = sAllCacheImagesProxy->dlopenFromCache(gLinkContext, path, mode, handle);
if ( !result && (strchr(path, '/') == NULL) ) {
// POSIX says you can call dlopen() with a leaf name (e.g. dlopen("libz.dylb"))
+ char fallbackPath[PATH_MAX];
strcpy(fallbackPath, "/usr/lib/");
strlcat(fallbackPath, path, PATH_MAX);
result = sAllCacheImagesProxy->dlopenFromCache(gLinkContext, fallbackPath, mode, handle);
- if ( !result )
- path = fallbackPath;
- }
- if ( !result ) {
- // leaf name could be a symlink
- char resolvedPath[PATH_MAX];
- realpath(path, resolvedPath);
- int realpathErrno = errno;
- // If realpath() resolves to a path which does not exist on disk, errno is set to ENOENT
- if ( (realpathErrno == ENOENT) || (realpathErrno == 0) ) {
- result = sAllCacheImagesProxy->dlopenFromCache(gLinkContext, resolvedPath, mode, handle);
- }
- }
-
+ }
return result;
}
@@ -4255,7 +4893,9 @@
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;
@@ -4284,7 +4924,7 @@
gLinkContext.dynamicInterposeCount = 0;
gLinkContext.prebindUsage = ImageLoader::kUseAllPrebinding;
#if TARGET_IPHONE_SIMULATOR
- gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
+ gLinkContext.sharedRegionMode = ImageLoader::kDontUseSharedRegion;
#else
gLinkContext.sharedRegionMode = ImageLoader::kUseSharedRegion;
#endif
@@ -4297,7 +4937,6 @@
// Its presences means that the binary wants to have DYLD ignore
// DYLD_ environment variables.
//
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
static bool hasRestrictedSegment(const macho_header* mh)
{
const uint32_t cmd_count = mh->ncmds;
@@ -4326,9 +4965,8 @@
return false;
}
-#endif
-
-#if __IPHONE_OS_VERSION_MIN_REQUIRED && !TARGET_IPHONE_SIMULATOR
+
+#if __IPHONE_OS_VERSION_MIN_REQUIRED
static bool isFairPlayEncrypted(const macho_header* mh)
{
const uint32_t cmd_count = mh->ncmds;
@@ -4386,6 +5024,7 @@
uint8_t firstPage[4096];
const macho_header* mh = (macho_header*)firstPage;
if ( !readFirstPage(dylibPath, firstPage) ) {
+ #if DYLD_SHARED_CACHE_SUPPORT
// If file cannot be read, check to see if path is in shared cache
const macho_header* mhInCache;
const char* pathInCache;
@@ -4393,6 +5032,9 @@
if ( !findInSharedCacheImage(dylibPath, true, NULL, &mhInCache, &pathInCache, &slideInCache) )
return false;
mh = mhInCache;
+ #else
+ return false;
+ #endif
}
// check mach-o header
@@ -4663,13 +5305,13 @@
//
static void configureProcessRestrictions(const macho_header* mainExecutableMH)
{
+ uint32_t flags;
#if TARGET_IPHONE_SIMULATOR
sEnvMode = envAll;
gLinkContext.requireCodeSignature = true;
#elif __IPHONE_OS_VERSION_MIN_REQUIRED
sEnvMode = envNone;
gLinkContext.requireCodeSignature = true;
- uint32_t flags;
if ( csops(0, CS_OPS_STATUS, &flags, sizeof(flags)) != -1 ) {
if ( flags & CS_ENFORCEMENT ) {
if ( flags & CS_GET_TASK_ALLOW ) {
@@ -4703,11 +5345,9 @@
if ( issetugid() || hasRestrictedSegment(mainExecutableMH) ) {
gLinkContext.processIsRestricted = true;
}
- bool usingSIP = (csr_check(CSR_ALLOW_TASK_FOR_PID) != 0);
- uint32_t flags;
if ( csops(0, CS_OPS_STATUS, &flags, sizeof(flags)) != -1 ) {
// On OS X CS_RESTRICT means the program was signed with entitlements
- if ( ((flags & CS_RESTRICT) == CS_RESTRICT) && usingSIP ) {
+ if ( ((flags & CS_RESTRICT) == CS_RESTRICT) && (csr_check(CSR_ALLOW_TASK_FOR_PID) != 0) ) {
gLinkContext.processIsRestricted = true;
}
// Library Validation loosens searching but requires everything to be code signed
@@ -4715,7 +5355,6 @@
gLinkContext.processIsRestricted = false;
//gLinkContext.requireCodeSignature = true;
gLinkContext.processUsingLibraryValidation = true;
- sSafeMode = usingSIP;
}
}
#endif
@@ -4754,14 +5393,9 @@
}
}
-void notifyKernelAboutImage(const struct macho_header* mh, const char* fileInfo)
-{
- const char *endptr = nullptr;
- uint64_t fsid_scalar = hexToUInt64(fileInfo, &endptr);
- uint64_t fsobj_id_scalar = 0;
- if (endptr != nullptr) {
- fsobj_id_scalar = hexToUInt64(endptr+1, &endptr);
- }
+void notifyKernelAboutDyld()
+{
+ 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;
@@ -4770,7 +5404,14 @@
case LC_UUID: {
// Add dyld to the kernel image info
uuid_command* uc = (uuid_command*)cmd;
- dyld3::kdebug_trace_dyld_image(DBG_DYLD_UUID_MAP_A, (const uuid_t *)&uc->uuid[0], *reinterpret_cast<fsobj_id_t *>(&fsobj_id_scalar), *reinterpret_cast<fsid_t *>(&fsid_scalar), (const mach_header *)mh);
+ dyld_kernel_image_info_t kernelInfo;
+ memcpy(kernelInfo.uuid, uc->uuid, 16);
+ kernelInfo.load_addr = (uint64_t)mh;
+ kernelInfo.fsobjid.fid_objno = 0;
+ kernelInfo.fsobjid.fid_generation = 0;
+ kernelInfo.fsid.val[0] = 0;
+ kernelInfo.fsid.val[1] = 0;
+ task_register_dyld_image_infos(mach_task_self(), &kernelInfo, 1);
return;
}
}
@@ -4784,7 +5425,7 @@
typedef int (*ioctl_proc_t)(int, unsigned long, void*);
static void* getProcessInfo() { return dyld::gProcessInfo; }
static SyscallHelpers sSysCalls = {
- 8,
+ 7,
// added in version 1
(open_proc_t)&open,
&close,
@@ -4838,12 +5479,7 @@
&task_get_dyld_image_infos,
&task_register_dyld_shared_cache_image_info,
&task_register_dyld_set_dyld_state,
- &task_register_dyld_get_process_state,
- // Added in version 8
- &task_info,
- &thread_info,
- &kdebug_is_enabled,
- &kdebug_trace
+ &task_register_dyld_get_process_state
};
__attribute__((noinline))
@@ -4887,7 +5523,7 @@
return "pread(dyld_sim) failed";
}
else if ( !isCompatibleMachO(firstPage, dyldPath) ) {
- return "dyld_sim is not compatible with the loaded process, likely due to architecture mismatch";
+ return "dyld_sim not compatible mach-o";
}
// calculate total size of dyld segments
@@ -5010,6 +5646,7 @@
if ( siginfo.fs_file_start < codeSigCmd->dataoff )
return mkstringf("dyld_sim code signature does not cover all of dyld_sim. Signature covers up to 0x%08lX. Signature starts at 0x%08X", (unsigned long)siginfo.fs_file_start, codeSigCmd->dataoff);
+
// walk newly mapped dyld_sim __TEXT load commands to find entry point
uintptr_t entry = 0;
cmd = (struct load_command*)(((char*)loadAddress)+sizeof(macho_header));
@@ -5058,563 +5695,6 @@
}
#endif
-//
-// If the DYLD_SKIP_MAIN environment is set to 1, dyld will return the
-// address of this function instead of main() in the target program which
-// __dyld_start jumps to. Useful for qualifying dyld itself.
-//
-int
-fake_main()
-{
- return 0;
-}
-
-
-
-
-static bool envVarMatches(dyld3::launch_cache::Closure mainClosure, const char* envp[], const char* varName)
-{
- __block const char* valueFromClosure = nullptr;
- mainClosure.forEachEnvVar(^(const char* keyEqualValue, bool& stop) {
- size_t keyLen = strlen(varName);
- if ( (strncmp(varName, keyEqualValue, keyLen) == 0) && (keyEqualValue[keyLen] == '=') ) {
- valueFromClosure = &keyEqualValue[keyLen+1];
- stop = true;
- }
- });
-
- const char* valueFromEnv = _simple_getenv(envp, varName);
-
- bool inClosure = (valueFromClosure != nullptr);
- bool inEnv = (valueFromEnv != nullptr);
- if ( inClosure != inEnv )
- return false;
- if ( !inClosure && !inEnv )
- return true;
- return ( strcmp(valueFromClosure, valueFromEnv) == 0 );
-}
-
-static const char* const sEnvVarsToCheck[] = {
- "DYLD_LIBRARY_PATH",
- "DYLD_FRAMEWORK_PATH",
- "DYLD_FALLBACK_LIBRARY_PATH",
- "DYLD_FALLBACK_FRAMEWORK_PATH",
- "DYLD_INSERT_LIBRARIES",
- "DYLD_IMAGE_SUFFIX",
- "DYLD_VERSIONED_FRAMEWORK_PATH",
- "DYLD_VERSIONED_LIBRARY_PATH",
- "DYLD_ROOT_PATH"
-};
-
-static bool envVarsMatch(dyld3::launch_cache::Closure mainClosure, const char* envp[])
-{
- for (const char* envVar : sEnvVarsToCheck) {
- if ( !envVarMatches(mainClosure, envp, envVar) ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because %s changed\n", mainClosure.binaryData(), envVar);
- return false;
- }
- }
-
- return true;
-}
-
-static bool closureValid(const dyld3::launch_cache::BinaryClosureData* mainClosureData, const mach_header* mainExecutableMH, const uint8_t* mainExecutableCDHash, bool closureInCache, const char* envp[])
-{
- const dyld3::launch_cache::Closure mainClosure(mainClosureData);
- const dyld3::launch_cache::ImageGroup mainGroup = mainClosure.group();
-
- // verify current dyld cache is same as expected
- if ( sSharedCacheLoadInfo.loadAddress == nullptr ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p dyld cache not loaded\n", mainClosureData);
- return false;
- }
- if ( !closureInCache ) {
- // closures in cache don't have cache's UUID
- uuid_t cacheUUID;
- sSharedCacheLoadInfo.loadAddress->getUUID(cacheUUID);
- if ( memcmp(mainClosure.dyldCacheUUID(), cacheUUID, sizeof(uuid_t)) != 0 ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because built against different dyld cache\n", mainClosureData);
- return false;
- }
- }
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- else {
- // If the in-memory cache doesn't have the same UUID xattr as the on-disk cache then we must
- // have built a new cache but not rebooted. In this case, don't use dyld3.
- const char* sharedCachePath = getStandardSharedCacheFilePath();
- uuid_t inMemoryUUID;
- uuid_t onDiskUUID;
- sharedCacheUUID(inMemoryUUID);
- if (getxattr(sharedCachePath, "cacheUUID", (void*)&onDiskUUID, sizeof(uuid_t), 0, 0) != sizeof(uuid_t)) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p on disk cache doesn't have a UUID xattr\n", mainClosureData);
- return false;
- }
- if (memcmp(&inMemoryUUID, &onDiskUUID, sizeof(uuid_t)) != 0) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because current cache on disk and in memory cache have UUID mismatches\n", mainClosureData);
- return false;
- }
- }
-#endif
-
- // verify main executable file has not changed since closure was built
- const dyld3::launch_cache::Image mainImage = mainGroup.image(mainClosure.mainExecutableImageIndex());
- if ( mainImage.validateUsingModTimeAndInode() ) {
- struct stat statBuf;
- if ( ::stat(mainImage.path(), &statBuf) != 0 ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because stat() failed on main executable\n", mainClosureData);
- return false;
- }
- else if ( (statBuf.st_mtime != mainImage.fileModTime()) || (statBuf.st_ino != mainImage.fileINode()) ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because mtime/inode changed since closure was built\n", mainClosureData);
- return false;
- }
- }
-
- // verify cdHash of main executable is same as recorded in closure
- if ( mainImage.validateUsingCdHash() ) {
- if ( mainExecutableCDHash == nullptr ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because main executable is not code signed but was expected to be\n", mainClosureData);
- return false;
- }
- if ( memcmp(mainExecutableCDHash, mainClosure.cdHash(), 20) != 0 ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because main executable cd-hash changed since closure was built\n", mainClosureData);
- return false;
- }
- }
-
- // verify UUID of main executable is same as recorded in closure
- const uuid_t* closureMainUUID = mainImage.uuid();
- dyld3::MachOParser parser(mainExecutableMH);
- uuid_t actualUUID;
- parser.getUuid(actualUUID);
- if ( memcmp(actualUUID, closureMainUUID, sizeof(uuid_t)) != 0 ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because UUID of executable changed since closure was built\n", mainClosureData);
- return false;
- }
-
- // verify DYLD_* env vars are same as when closure was built
- if ( !envVarsMatch(mainClosure, envp) ) {
- return false;
- }
-
- // verify files that are supposed to be missing actually are missing
- __block bool foundFileThatInvalidatesClosure = false;
- mainClosure.forEachMustBeMissingFile(^(const char* path, bool& stop) {
- struct stat statBuf;
- if ( ::stat(path, &statBuf) == 0 ) {
- stop = true;
- foundFileThatInvalidatesClosure = true;
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because found unexpected file '%s'\n", mainClosureData, path);
- }
- });
-
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
- // verify no key frameworks have been overridden since cache was built
- if ( dyld3::loader::internalInstall() ) {
- dyld3::loader::forEachLineInFile("/AppleInternal/Library/Preferences/dyld-potential-framework-overrides", ^(const char* path, bool& stop) {
- dyld3::SharedCacheFindDylibResults shareCacheResults;
- if ( dyld3::findInSharedCacheImage(sSharedCacheLoadInfo, path, &shareCacheResults) ) {
- dyld3::launch_cache::Image image(shareCacheResults.imageData);
- struct stat statBuf;
- if ( ::stat(path, &statBuf) == 0 ) {
- if ( (image.fileModTime() != statBuf.st_mtime) || (image.fileINode() != statBuf.st_ino)) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closure %p not used because framework has changed: '%s'\n", mainClosureData, path);
- foundFileThatInvalidatesClosure = true;
- stop = true;
- }
- }
- }
- });
- }
-#endif
-
- return !foundFileThatInvalidatesClosure;
-}
-
-static bool nolog(const char* format, ...)
-{
- return false;
-}
-
-static bool dolog(const char* format, ...)
-{
- va_list list;
- va_start(list, format);
- vlog(format, list);
- va_end(list);
- return true;
-}
-
-static bool launchWithClosure(const dyld3::launch_cache::BinaryClosureData* mainClosureData,
- const DyldSharedCache* dyldCache,
- const mach_header* mainExecutableMH, uintptr_t mainExecutableSlide,
- int argc, const char* argv[], const char* envp[], const char* apple[],
- uintptr_t* entry, uintptr_t* startGlue)
-{
- dyld3::launch_cache::Closure mainClosure(mainClosureData);
- const dyld3::launch_cache::ImageGroup mainGroup = mainClosure.group();
- const uint32_t mainExecutableIndex = mainClosure.mainExecutableImageIndex();
- const dyld3::launch_cache::Image mainImage = mainGroup.image(mainExecutableIndex);
- const uint32_t loadedImageCount = mainClosure.initialImageCount();
-
- // construct array of groups
- dyld3::DyldCacheParser cacheParser(dyldCache, false);
- STACK_ALLOC_DYNARRAY(const dyld3::launch_cache::binary_format::ImageGroup*, 3, theGroups);
- theGroups[0] = cacheParser.cachedDylibsGroup();
- theGroups[1] = cacheParser.otherDylibsGroup();
- theGroups[2] = mainClosure.group().binaryData();
-
- // construct array of all Image*, starting with any inserted dylibs, then main executable
- const dyld3::launch_cache::BinaryImageData* images[loadedImageCount];
- dyld3::launch_cache::SlowLoadSet imageSet(&images[0], &images[loadedImageCount]);
- for (uint32_t i=0; i <= mainExecutableIndex; ++i) {
- imageSet.add(mainGroup.image(i).binaryData());
- }
- // add all dependents of main executable
- if ( !mainImage.recurseAllDependentImages(theGroups, imageSet, nullptr) ) {
- dyld::log("initial image list overflow, expected only %d\n", loadedImageCount);
- return false;
- }
- // add dependents of any inserted dylibs
- for (uint32_t i=0; i < mainExecutableIndex; ++i) {
- if ( !mainGroup.image(i).recurseAllDependentImages(theGroups, imageSet, nullptr) ) {
- dyld::log("initial image list overflow in inserted libraries, expected only %d\n", loadedImageCount);
- return false;
- }
- }
- const uint32_t actualImageCount = (uint32_t)imageSet.count();
- // construct array of allImages
- STACK_ALLOC_DYNARRAY(dyld3::loader::ImageInfo, actualImageCount, allImages);
- for (int i=0; i < actualImageCount; ++i) {
- dyld3::launch_cache::Image img(images[i]);
- dyld3::launch_cache::ImageGroup grp = img.group();
- allImages[i].imageData = img.binaryData();
- allImages[i].loadAddress = nullptr;
- allImages[i].groupNum = grp.groupNum();
- allImages[i].indexInGroup = grp.indexInGroup(img.binaryData());
- allImages[i].previouslyFixedUp = false;
- allImages[i].justMapped = false;
- allImages[i].justUsedFromDyldCache = false;
- allImages[i].neverUnload = false;
- }
- // prefill address of main executable to mark it is already loaded
- allImages[mainExecutableIndex].loadAddress = mainExecutableMH;
-
- // map new images and apply all fixups
- Diagnostics diag;
- mapAndFixupImages(diag, allImages, (const uint8_t*)dyldCache, (gLinkContext.verboseLoading ? &dolog : &nolog),
- (gLinkContext.verboseMapping ? &dolog : &nolog),
- (gLinkContext.verboseBind ? &dolog : &nolog),
- (gLinkContext.verboseDOF ? &dolog : &nolog));
- if ( diag.hasError() ) {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: %s\n", diag.errorMessage());
- return false;
- }
-
- //dyld::log("loaded image list:\n");
- //for (int i=0; i < allImages.count(); ++i) {
- // dyld3::launch_cache::Image img(allImages[i].imageData);
- // dyld::log("binImage[%d]=%p, mh=%p, path=%s\n", i, allImages[i].imageData, allImages[i].loadAddress, img.path());
- //}
-
- // find special images
- const dyld3::launch_cache::BinaryImageData* libSystemImage = mainClosure.libSystem(theGroups);
- const dyld3::launch_cache::BinaryImageData* libDyldImage = mainClosure.libDyld(theGroups);
- const mach_header* libdyldMH = nullptr;
- const mach_header* libSystemMH = nullptr;
- for (int i=0; i < allImages.count(); ++i) {
- if ( allImages[i].imageData == libSystemImage )
- libSystemMH = allImages[i].loadAddress;
- else if ( allImages[i].imageData == libDyldImage )
- libdyldMH = allImages[i].loadAddress;
- }
-
- // send info on all images to libdyld.dylb
- const dyld3::LibDyldEntryVector* libDyldEntry = (dyld3::LibDyldEntryVector*)((uint8_t*)libdyldMH + mainClosure.libdyldVectorOffset());
- libDyldEntry->setVars(mainExecutableMH, argc, argv, envp, apple);
- libDyldEntry->setHaltFunction(&halt);
- if ( libDyldEntry->vectorVersion > 2 )
- libDyldEntry->setChildForkFunction(&_dyld_fork_child);
-#if !TARGET_IPHONE_SIMULATOR
- if ( libDyldEntry->vectorVersion > 3 )
- libDyldEntry->setLogFunction(&dyld::vlog);
-#endif
- libDyldEntry->setOldAllImageInfo(gProcessInfo);
- libDyldEntry->setInitialImageList(mainClosureData, dyldCache, sSharedCacheLoadInfo.path, allImages, libSystemMH, libSystemImage);
- // run initializers
- CRSetCrashLogMessage("dyld3: launch, running initializers");
- libDyldEntry->runInitialzersBottomUp((mach_header*)mainExecutableMH);
- //dyld::log("returned from runInitialzersBottomUp()\n");
-
- dyld3::kdebug_trace_dyld_signpost(DBG_DYLD_SIGNPOST_START_MAIN, 0, 0);
- if ( mainClosure.mainExecutableUsesCRT() ) {
- // old style app linked with crt1.o
- // entry is "start" function in program
- *startGlue = 0;
- *entry = (uintptr_t)mainExecutableMH + mainClosure.mainExecutableEntryOffset();
- }
- else {
- // modern app with LC_MAIN
- // set startGlue to "start" function in libdyld.dylib
- // set entry to "main" function in program
- *startGlue = (uintptr_t)(libDyldEntry->startFunc);
- *entry =(uintptr_t)mainExecutableMH + mainClosure.mainExecutableEntryOffset();
- }
- CRSetCrashLogMessage(NULL);
- return true;
-}
-
-static void putHexNibble(uint8_t value, char*& p)
-{
- if ( value < 10 )
- *p++ = '0' + value;
- else
- *p++ = 'A' + value - 10;
-}
-
-static void putHexByte(uint8_t value, char*& p)
-{
- value &= 0xFF;
- putHexNibble(value >> 4, p);
- putHexNibble(value & 0x0F, p);
-}
-
-static void makeHexLong(unsigned long value, char* p)
-{
- *p++ = '0';
- *p++ = 'x';
-#if __LP64__
- putHexByte(value >> 56, p);
- putHexByte(value >> 48, p);
- putHexByte(value >> 40, p);
- putHexByte(value >> 32, p);
-#endif
- putHexByte(value >> 24, p);
- putHexByte(value >> 16, p);
- putHexByte(value >> 8, p);
- putHexByte(value, p);
- *p = '\0';
-}
-
-static void makeUUID(uint8_t uuid[16], char* p)
-{
- putHexByte(uuid[0], p);
- putHexByte(uuid[1], p);
- putHexByte(uuid[2], p);
- putHexByte(uuid[3], p);
- *p++ = '-';
- putHexByte(uuid[4], p);
- putHexByte(uuid[5], p);
- *p++ = '-';
- putHexByte(uuid[6], p);
- putHexByte(uuid[7], p);
- *p++ = '-';
- putHexByte(uuid[8], p);
- putHexByte(uuid[9], p);
- *p++ = '-';
- putHexByte(uuid[10], p);
- putHexByte(uuid[11], p);
- putHexByte(uuid[12], p);
- putHexByte(uuid[13], p);
- putHexByte(uuid[14], p);
- putHexByte(uuid[15], p);
- *p = '\0';
-}
-
-#if !TARGET_IPHONE_SIMULATOR
-static const dyld3::launch_cache::BinaryClosureData* callClosureDaemon(const char* mainExecPath, const char* envp[])
-{
- // temp, until we can get a bootstrap_lookup that works from dyld
-#if 1
- // Create a pipe
- int sockets[2];
- if ( ::pipe(sockets) < 0 ) {
- dyld::log("error opening stream socket pair to closured\n");
- return NULL;
- }
- //dyld::log("created sockets %d and %d\n", sockets[0], sockets[1]);
- // use fork/exec to launch closured
- int child = ::__fork();
- if ( child == -1 ) {
- dyld::log("error forking, errno=%d\n", errno);
- return NULL;
- }
- if ( child ) {
- // parent side
- //dyld::log("parent side pid=%d\n", getpid());
- ::close(sockets[1]);
- SocketBasedClousureHeader header;
- long amount = ::read(sockets[0], &header, sizeof(SocketBasedClousureHeader));
- if ( amount != sizeof(SocketBasedClousureHeader) ) {
- dyld::log("error reading, errno=%d\n", errno);
- return NULL;
- }
- vm_address_t bufferAddress = 0;
- if ( ::vm_allocate(mach_task_self(), &bufferAddress, header.length, VM_FLAGS_ANYWHERE) != 0 ) {
- dyld::log("error allocating buffer\n");
- return NULL;
- }
- amount = ::read(sockets[0], (void*)bufferAddress, header.length);
- close(sockets[0]);
- if ( amount != header.length ) {
- dyld::log("dyld: error reading buffer header from closured, amount=%ld, errno=%d\n", amount, errno);
- return NULL;
- }
- if ( header.success ) {
- // make buffer read-only
- vm_protect(mach_task_self(), bufferAddress, header.length, VM_PROT_READ, VM_PROT_READ);
- return (const dyld3::launch_cache::BinaryClosureData*)bufferAddress;
- }
- else {
- // buffer contains error message as to why closure could not be built
- dyld::log("%s", (char*)bufferAddress);
- ::vm_deallocate(mach_task_self(), bufferAddress, header.length);
- return NULL;
- }
- }
- else {
- // child side
- //dyld::log("child side pid=%d\n", getpid());
- close(sockets[0]);
- const char* closuredPath = "/usr/libexec/closured";
- char pipeStr[8];
- pipeStr[0] = '0' + sockets[1];
- pipeStr[1] = '\0';
- const char* argv[32];
- char cacheUuidString[64];
- char cacheAddrString[64];
- char cacheSizeString[64];
- int i = 0;
- uuid_t cacheUUID;
- sSharedCacheLoadInfo.loadAddress->getUUID(cacheUUID);
- makeHexLong((long)sSharedCacheLoadInfo.loadAddress, cacheAddrString);
- makeHexLong((long)sSharedCacheLoadInfo.loadAddress->mappedSize(), cacheSizeString);
- makeUUID(cacheUUID, cacheUuidString);
- argv[i++] = closuredPath;
- argv[i++] = "-create_closure";
- argv[i++] = mainExecPath;
- argv[i++] = "-pipefd";
- argv[i++] = pipeStr;
- argv[i++] = "-cache_uuid";
- argv[i++] = cacheUuidString;
- argv[i++] = "-cache_address";
- argv[i++] = cacheAddrString;
- argv[i++] = "-cache_size";
- argv[i++] = cacheSizeString;
- for (const char**p=envp; *p != NULL; ++p) {
- const char* envToCheck = *p;
- for (const char* dyldEnvVar : sEnvVarsToCheck) {
- size_t dyldEnvVarLen = strlen(dyldEnvVar);
- if ( (strncmp(dyldEnvVar, envToCheck, dyldEnvVarLen) == 0) && (envToCheck[dyldEnvVarLen] == '=') ) {
- argv[i++] = "-env";
- argv[i++] = envToCheck;
- }
- }
- }
- argv[i] = nullptr;
- //dyld::log("closured args:\n");
- //for (int j=0; argv[j] != nullptr; ++j)
- // dyld::log(" argv[%d]=%s\n", j, argv[j]);
- execve(closuredPath, (char**)argv, nullptr);
- dyld::log("exec() of closured failed, errno=%d\n", errno);
- }
- return NULL;
-
-#else
- // get port to closured
- mach_port_t serverPort = dyld3::loader::lookupClosuredPort();
- if ( serverPort == MACH_PORT_NULL )
- return NULL;
-
- // build env var list
- char envBuffer[2048];
- char* s = envBuffer;
- for (const char* envVar : sEnvVarsToCheck) {
- if ( const char* valueFromEnv = _simple_getenv(envp, envVar) ) {
- strcpy(s, envVar);
- strcat(s, "=");
- strcat(s, valueFromEnv);
- s += strlen(s)+1;
- }
- }
- *s++ = '\0';
-
- // get uuid of main executable
- dyld3::MachOParser mainParser((mach_header*)sMainExecutableMachHeader);
- uuid_t mainUuid;
- mainParser.getUuid(mainUuid);
-
- // message closured to build closure
- bool success = false;
- vm_offset_t reply = 0;
- uint32_t replySize = 0;
- if ( closured_CreateLaunchClosure(serverPort, sExecPath, sSharedCachePath, mainUuid, envBuffer, &success, &reply, &replySize) != KERN_SUCCESS )
- return NULL;
-
- // release server port
- mach_port_deallocate(mach_task_self(), serverPort);
-
- if ( success )
- return (const dyld3::launch_cache::BinaryClosureData*)reply;
-
- dyld::log("closure failed to build: %s\n", (char*)reply);
- return NULL;
-#endif
-}
-#endif // !TARGET_IPHONE_SIMULATOR
-
-
-#if !__MAC_OS_X_VERSION_MIN_REQUIRED
-static const char* sWhiteListDirs[] = {
- "/bin/",
- "/sbin/",
- "/usr/bin/"
-};
-#endif
-
-static bool inWhiteList(const char* execPath)
-{
- // First test to see if we forced in dyld2 via a kernel boot-arg
- if ( dyld3::loader::bootArgsContains("force_dyld2=1") )
- return false;
-
-#if __MAC_OS_X_VERSION_MIN_REQUIRED
-
- // rdar://problem/32701418: Don't use dyld3 for i386 for now.
-#if __i386__
- return false;
-#else
-
-
- return true;
-#endif // #if __i386__
-
-#else
- // <rdar://problem/33171968> enable dyld3 mode for all OS programs when using customer dyld cache (no roots)
- if ( (sSharedCacheLoadInfo.loadAddress != nullptr) && (sSharedCacheLoadInfo.loadAddress->header.cacheType == kDyldSharedCacheTypeProduction) )
- return true;
-
- for (const char* dir : sWhiteListDirs) {
- if ( strncmp(dir, sExecPath, strlen(dir)) == 0 ) {
- return true;
- }
- }
- return dyld3::loader::bootArgsContains("force_dyld3=1");
-#endif
-}
//
// Entry point for dyld. The kernel loads dyld and jumps to __dyld_start which
@@ -5627,28 +5707,14 @@
int argc, const char* argv[], const char* envp[], const char* apple[],
uintptr_t* startGlue)
{
- dyld3::kdebug_trace_dyld_signpost(DBG_DYLD_SIGNPOST_START_DYLD, 0, 0);
-
- // Grab the cdHash of the main executable from the environment
- uint8_t mainExecutableCDHashBuffer[20];
- const uint8_t* mainExecutableCDHash = nullptr;
- if ( hexToBytes(_simple_getenv(apple, "executable_cdhash"), 40, mainExecutableCDHashBuffer) )
- mainExecutableCDHash = mainExecutableCDHashBuffer;
-
- // Trace dyld's load
- notifyKernelAboutImage((macho_header*)&__dso_handle, _simple_getenv(apple, "dyld_file"));
-#if !TARGET_IPHONE_SIMULATOR
- // Trace the main executable's load
- notifyKernelAboutImage(mainExecutableMH, _simple_getenv(apple, "executable_file"));
-#endif
-
uintptr_t result = 0;
sMainExecutableMachHeader = mainExecutableMH;
- sMainExecutableSlide = mainExecutableSlide;
#if __MAC_OS_X_VERSION_MIN_REQUIRED
// if this is host dyld, check to see if iOS simulator is being run
const char* rootPath = _simple_getenv(envp, "DYLD_ROOT_PATH");
if ( rootPath != NULL ) {
+ // Add dyld to the kernel image info before we jump to the sim
+ notifyKernelAboutDyld();
// look to see if simulator has its own dyld
char simDyldPath[PATH_MAX];
@@ -5686,7 +5752,6 @@
sExecPath = s;
}
}
-
// Remember short name of process for later logging
sExecShortName = ::strrchr(sExecPath, '/');
if ( sExecShortName != NULL )
@@ -5713,96 +5778,6 @@
if ( sEnv.DYLD_PRINT_ENV )
printEnvironmentVariables(envp);
getHostInfo(mainExecutableMH, mainExecutableSlide);
-
- // load shared cache
- checkSharedRegionDisable((mach_header*)mainExecutableMH);
-#if TARGET_IPHONE_SIMULATOR
- // <HACK> until <rdar://30773711> is fixed
- gLinkContext.sharedRegionMode = ImageLoader::kUsePrivateSharedRegion;
- // </HACK>
-#endif
- if ( gLinkContext.sharedRegionMode != ImageLoader::kDontUseSharedRegion ) {
- mapSharedCache();
- }
-
- if ( (sEnableClosures || inWhiteList(sExecPath)) && (sSharedCacheLoadInfo.loadAddress != nullptr) ) {
- if ( sSharedCacheLoadInfo.loadAddress->header.formatVersion == dyld3::launch_cache::binary_format::kFormatVersion ) {
- const dyld3::launch_cache::BinaryClosureData* mainClosureData;
- // check for closure in cache first
- dyld3::DyldCacheParser cacheParser(sSharedCacheLoadInfo.loadAddress, false);
- mainClosureData = cacheParser.findClosure(sExecPath);
- #if __IPHONE_OS_VERSION_MIN_REQUIRED
- if ( mainClosureData == nullptr ) {
- // see if this is an OS app that was moved
- if ( strncmp(sExecPath, "/var/containers/Bundle/Application/", 35) == 0 ) {
- dyld3::MachOParser mainParser((mach_header*)mainExecutableMH);
- uint32_t textOffset;
- uint32_t textSize;
- if ( !mainParser.isFairPlayEncrypted(textOffset, textSize) ) {
- __block bool hasEmbeddedDylibs = false;
- mainParser.forEachDependentDylib(^(const char* loadPath, bool, bool, bool, uint32_t, uint32_t, bool& stop) {
- if ( loadPath[0] == '@' ) {
- hasEmbeddedDylibs = true;
- stop = true;
- }
- });
- if ( !hasEmbeddedDylibs ) {
- char altPath[1024];
- const char* lastSlash = strrchr(sExecPath, '/');
- if ( lastSlash != nullptr ) {
- strlcpy(altPath, "/private/var/staged_system_apps", sizeof(altPath));
- strlcat(altPath, lastSlash, sizeof(altPath));
- strlcat(altPath, ".app", sizeof(altPath));
- strlcat(altPath, lastSlash, sizeof(altPath));
- if ( gLinkContext.verboseWarnings )
- dyld::log("try path: %s\n", altPath);
- mainClosureData = cacheParser.findClosure(altPath);
- }
- }
- }
- }
- }
- #endif
- if ( gLinkContext.verboseWarnings && (mainClosureData != nullptr) )
- dyld::log("dyld: found closure %p in dyld shared cache\n", mainClosureData);
- #if !TARGET_IPHONE_SIMULATOR
- if ( (mainClosureData == nullptr) || !closureValid(mainClosureData, (mach_header*)mainExecutableMH, mainExecutableCDHash, true, envp) ) {
- mainClosureData = nullptr;
- if ( sEnableClosures ) {
- // if forcing closures, and no closure in cache, or it is invalid, then RPC to closured
- mainClosureData = callClosureDaemon(sExecPath, envp);
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: closured return %p for %s\n", mainClosureData, sExecPath);
- if ( (mainClosureData != nullptr) && !closureValid(mainClosureData, (mach_header*)mainExecutableMH, mainExecutableCDHash, false, envp) ) {
- // some how freshly generated closure is invalid...
- mainClosureData = nullptr;
- }
- }
- }
- #endif
- // try using launch closure
- if ( mainClosureData != nullptr ) {
- CRSetCrashLogMessage("dyld3: launch started");
- if ( launchWithClosure(mainClosureData, sSharedCacheLoadInfo.loadAddress, (mach_header*)mainExecutableMH, mainExecutableSlide,
- argc, argv, envp, apple, &result, startGlue) ) {
- if (sSkipMain)
- result = (uintptr_t)&fake_main;
- return result;
- }
- else {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: unable to use closure %p\n", mainClosureData);
- }
- }
- }
- else {
- if ( gLinkContext.verboseWarnings )
- dyld::log("dyld: not using closure because shared cache format version does not match dyld's\n");
- }
- // could not use closure info, launch old way
- }
-
-
// install gdb notifier
stateToHandlers(dyld_image_state_dependents_mapped, sBatchHandlers)->push_back(notifyGDB);
stateToHandlers(dyld_image_state_mapped, sSingleHandlers)->push_back(updateAllImages);
@@ -5824,14 +5799,10 @@
try {
// add dyld itself to UUID list
addDyldImageToUUIDList();
+ notifyKernelAboutDyld();
#if SUPPORT_ACCELERATE_TABLES
bool mainExcutableAlreadyRebased = false;
- if ( (sSharedCacheLoadInfo.loadAddress != nullptr) && !dylibsCanOverrideCache() && !sDisableAcceleratorTables && (sSharedCacheLoadInfo.loadAddress->header.accelerateInfoAddr != 0) ) {
- struct stat statBuf;
- if ( ::stat(IPHONE_DYLD_SHARED_CACHE_DIR "no-dyld2-accelerator-tables", &statBuf) != 0 )
- sAllCacheImagesProxy = ImageLoaderMegaDylib::makeImageLoaderMegaDylib(&sSharedCacheLoadInfo.loadAddress->header, sSharedCacheLoadInfo.slide, mainExecutableMH, gLinkContext);
- }
reloadAllImages:
#endif
@@ -5881,6 +5852,23 @@
gLinkContext.strictMachORequired = true;
#endif
+ // load shared cache
+ checkSharedRegionDisable();
+ #if DYLD_SHARED_CACHE_SUPPORT
+ if ( gLinkContext.sharedRegionMode != ImageLoader::kDontUseSharedRegion ) {
+ mapSharedCache();
+ } else {
+ dyld_kernel_image_info_t kernelCacheInfo;
+ bzero(&kernelCacheInfo.uuid[0], sizeof(uuid_t));
+ kernelCacheInfo.load_addr = 0;
+ kernelCacheInfo.fsobjid.fid_objno = 0;
+ kernelCacheInfo.fsobjid.fid_generation = 0;
+ kernelCacheInfo.fsid.val[0] = 0;
+ kernelCacheInfo.fsid.val[0] = 0;
+ task_register_dyld_shared_cache_image_info(mach_task_self(), kernelCacheInfo, true, false);
+ }
+ #endif
+
#if SUPPORT_ACCELERATE_TABLES
sAllImages.reserve((sAllCacheImagesProxy != NULL) ? 16 : INITIAL_IMAGE_COUNT);
#else
@@ -5905,10 +5893,8 @@
#endif
char dyldPathBuffer[MAXPATHLEN+1];
int len = proc_regionfilename(getpid(), (uint64_t)(long)addressInDyld, dyldPathBuffer, MAXPATHLEN);
- if ( len > 0 ) {
- dyldPathBuffer[len] = '\0'; // proc_regionfilename() does not zero terminate returned string
- if ( strcmp(dyldPathBuffer, gProcessInfo->dyldPath) != 0 )
- gProcessInfo->dyldPath = strdup(dyldPathBuffer);
+ if ( (len != 0) && (strcmp(dyldPathBuffer, gProcessInfo->dyldPath) != 0) ) {
+ gProcessInfo->dyldPath = strdup(dyldPathBuffer);
}
// load any inserted libraries
@@ -6000,15 +5986,16 @@
// <rdar://problem/12186933> do weak binding only after all inserted images linked
sMainExecutable->weakBind(gLinkContext);
+ #if DYLD_SHARED_CACHE_SUPPORT
// If cache has branch island dylibs, tell debugger about them
- if ( (sSharedCacheLoadInfo.loadAddress != NULL) && (sSharedCacheLoadInfo.loadAddress->header.mappingOffset >= 0x78) && (sSharedCacheLoadInfo.loadAddress->header.branchPoolsOffset != 0) ) {
- uint32_t count = sSharedCacheLoadInfo.loadAddress->header.branchPoolsCount;
+ if ( (sSharedCache != NULL) && (sSharedCache->mappingOffset >= 0x78) && (sSharedCache->branchPoolsOffset != 0) ) {
+ uint32_t count = sSharedCache->branchPoolsCount;
dyld_image_info info[count];
- const uint64_t* poolAddress = (uint64_t*)((char*)sSharedCacheLoadInfo.loadAddress + sSharedCacheLoadInfo.loadAddress->header.branchPoolsOffset);
+ const uint64_t* poolAddress = (uint64_t*)((char*)sSharedCache + sSharedCache->branchPoolsOffset);
// <rdar://problem/20799203> empty branch pools can be in development cache
if ( ((mach_header*)poolAddress)->magic == sMainExecutableMachHeader->magic ) {
for (int poolIndex=0; poolIndex < count; ++poolIndex) {
- uint64_t poolAddr = poolAddress[poolIndex] + sSharedCacheLoadInfo.slide;
+ uint64_t poolAddr = poolAddress[poolIndex] + sSharedCacheSlide;
info[poolIndex].imageLoadAddress = (mach_header*)(long)poolAddr;
info[poolIndex].imageFilePath = "dyld_shared_cache_branch_islands";
info[poolIndex].imageFileModDate = 0;
@@ -6019,6 +6006,7 @@
gProcessInfo->notification(dyld_image_adding, count, info);
}
}
+ #endif
CRSetCrashLogMessage("dyld: launch, running initializers");
#if SUPPORT_OLD_CRT_INITIALIZATION
@@ -6029,11 +6017,6 @@
// run all initializers
initializeMainExecutable();
#endif
-
- // notify any montoring proccesses that this process is about to enter main()
- dyld3::kdebug_trace_dyld_signpost(DBG_DYLD_SIGNPOST_START_MAIN_DYLD2, 0, 0);
- notifyMonitoringDyldMain();
-
// find entry point for main executable
result = (uintptr_t)sMainExecutable->getThreadPC();
if ( result != 0 ) {
@@ -6058,17 +6041,12 @@
}
CRSetCrashLogMessage(NULL);
-
- if (sSkipMain) {
- dyld3::kdebug_trace_dyld_signpost(DBG_DYLD_SIGNPOST_START_MAIN, 0, 0);
- result = (uintptr_t)&fake_main;
- *startGlue = (uintptr_t)gLibSystemHelpers->startGlueToCallExit;
- }
return result;
}
+
} // namespace