Loading...
--- dyld/dyld-655.1/src/dyldAPIsInLibSystem.cpp
+++ dyld/dyld-832.7.1/src/dyldAPIsInLibSystem.cpp
@@ -28,26 +28,34 @@
#include <sys/mman.h>
#include <execinfo.h>
+#include <TargetConditionals.h>
#include <System/sys/csr.h>
#include <crt_externs.h>
#include <Availability.h>
+#if !TARGET_OS_DRIVERKIT
#include <vproc_priv.h>
-
+#endif
#include <dirent.h>
+#include <sys/types.h>
#include <sys/stat.h>
-
-#include "mach-o/dyld_images.h"
-#include "mach-o/dyld.h"
-#include "mach-o/dyld_priv.h"
+#include <fcntl.h>
+#include <System/sys/codesign.h>
+#include <libc_private.h>
+
+#include <mach-o/dyld_images.h>
+#include <mach-o/dyld.h>
+#include <mach-o/dyld_priv.h>
+
#include "dyld_cache_format.h"
+#include "objc-shared-cache.h"
#include "ImageLoader.h"
#include "dyldLock.h"
-#include "../dyld3/APIs.h"
-#include "../dyld3/AllImages.h"
-#include "../dyld3/StartGlue.h"
-#include "../dyld3/Tracing.h"
+#include "APIs.h"
+#include "AllImages.h"
+#include "StartGlue.h"
+#include "Tracing.h"
// this was in dyld_priv.h but it is no longer exported
@@ -65,78 +73,65 @@
//
extern "C" int _dyld_func_lookup(const char* dyld_func_name, void **address);
+#if TARGET_OS_IOS && !TARGET_OS_SIMULATOR
+namespace dyld3 {
+ extern int compatFuncLookup(const char* name, void** address) __API_AVAILABLE(ios(13.0));
+}
+extern "C" void setLookupFunc(void*);
+#endif
+
extern bool gUseDyld3;
-#ifndef LC_VERSION_MIN_MACOSX
- #define LC_VERSION_MIN_MACOSX 0x24
- struct version_min_command {
- uint32_t cmd; /* LC_VERSION_MIN_MACOSX or
- LC_VERSION_MIN_IPHONEOS */
- uint32_t cmdsize; /* sizeof(struct min_version_command) */
- uint32_t version; /* X.Y.Z is encoded in nibbles xxxx.yy.zz */
- uint32_t sdk; /* X.Y.Z is encoded in nibbles xxxx.yy.zz */
- };
-#endif
-
-#ifndef LC_VERSION_MIN_IPHONEOS
- #define LC_VERSION_MIN_IPHONEOS 0x25
-#endif
-
-#ifndef LC_VERSION_MIN_TVOS
- #define LC_VERSION_MIN_TVOS 0x2F
-#endif
-
-#ifndef LC_VERSION_MIN_WATCHOS
- #define LC_VERSION_MIN_WATCHOS 0x30
-#endif
-
-
-#ifndef LC_LOAD_UPWARD_DYLIB
- #define LC_LOAD_UPWARD_DYLIB (0x23|LC_REQ_DYLD) /* load of dylib whose initializers run later */
-#endif
-
-#ifndef LC_BUILD_VERSION
- #define LC_BUILD_VERSION 0x32 /* build for platform min OS version */
-
- /*
- * The build_version_command contains the min OS version on which this
- * binary was built to run for its platform. The list of known platforms and
- * tool values following it.
- */
- struct build_version_command {
- uint32_t cmd; /* LC_BUILD_VERSION */
- uint32_t cmdsize; /* sizeof(struct build_version_command) plus */
- /* ntools * sizeof(struct build_tool_version) */
- uint32_t platform; /* platform */
- uint32_t minos; /* X.Y.Z is encoded in nibbles xxxx.yy.zz */
- uint32_t sdk; /* X.Y.Z is encoded in nibbles xxxx.yy.zz */
- uint32_t ntools; /* number of tool entries following this */
- };
-
- struct build_tool_version {
- uint32_t tool; /* enum for the tool */
- uint32_t version; /* version number of the tool */
- };
-
- /* Known values for the platform field above. */
- #define PLATFORM_MACOS 1
- #define PLATFORM_IOS 2
- #define PLATFORM_TVOS 3
- #define PLATFORM_WATCHOS 4
- #define PLATFORM_BRIDGEOS 5
-
- /* Known values for the tool field above. */
- #define TOOL_CLANG 1
- #define TOOL_SWIFT 2
- #define TOOL_LD 3
-#endif
+
+// <rdar://problem/61161069> libdyld.dylib should use abort_with_payload() for asserts
+VIS_HIDDEN
+void abort_report_np(const char* format, ...)
+{
+ va_list list;
+ const char *str;
+ _SIMPLE_STRING s = _simple_salloc();
+ if ( s != NULL ) {
+ va_start(list, format);
+ _simple_vsprintf(s, format, list);
+ va_end(list);
+ str = _simple_string(s);
+ }
+ else {
+ // _simple_salloc failed, but at least format may have useful info by itself
+ str = format;
+ }
+ if ( gUseDyld3 ) {
+ dyld3::halt(str);
+ }
+ else {
+ void (*p)(const char* msg) __attribute__((__noreturn__));
+ _dyld_func_lookup("__dyld_halt", (void**)&p);
+ p(str);
+ }
+ // halt() doesn't return, so we can't call _simple_sfree
+}
+
+// libc uses assert()
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Winvalid-noreturn"
+VIS_HIDDEN
+void __assert_rtn(const char* func, const char* file, int line, const char* failedexpr)
+{
+ if (func == NULL) {
+ abort_report_np("Assertion failed: (%s), file %s, line %d.\n", failedexpr, file, line);
+ } else {
+ abort_report_np("Assertion failed: (%s), function %s, file %s, line %d.\n", failedexpr, func, file, line);
+ }
+}
+#pragma clang diagnostic pop
+
// deprecated APIs are still availble on Mac OS X, but not on iPhone OS
-#if __IPHONE_OS_VERSION_MIN_REQUIRED
+#if TARGET_OS_OSX
+ #define DEPRECATED_APIS_SUPPORTED 1
+#else
#define DEPRECATED_APIS_SUPPORTED 0
-#else
- #define DEPRECATED_APIS_SUPPORTED 1
#endif
/*
@@ -680,18 +675,7 @@
if (gUseDyld3)
return dyld3::dyld_get_active_platform();
- // HACK
- // Most of the new version SPIs have pure dyld3 implementations, but
- // They cannot get to the main executable, so we implement this here
- // and they can use this by calling ::dyld_get_active_platform() in the root namespace
- static dyld_platform_t sActivePlatform = 0;
- if (sActivePlatform) return sActivePlatform;
-
- dyld3::dyld_get_image_versions((mach_header*)_NSGetMachExecuteHeader(), ^(dyld_platform_t platform, uint32_t sdk_version, uint32_t min_version) {
- sActivePlatform = platform;
- //FIXME assert there is only one?
- });
- return sActivePlatform;
+ return (dyld_platform_t)_dyld_get_all_image_infos()->platform;
}
dyld_platform_t dyld_get_base_platform(dyld_platform_t platform) {
@@ -711,11 +695,11 @@
}
bool dyld_program_sdk_at_least(dyld_build_version_t version) {
- return dyld3::dyld_sdk_at_least((mach_header*)_NSGetMachExecuteHeader(),version);
+ return dyld3::dyld_program_sdk_at_least(version);
}
bool dyld_program_minos_at_least(dyld_build_version_t version) {
- return dyld3::dyld_minos_at_least((mach_header*)_NSGetMachExecuteHeader(), version);
+ return dyld3::dyld_program_minos_at_least(version);
}
// Function that walks through the load commands and calls the internal block for every version found
@@ -765,6 +749,15 @@
size_t size,
NSObjectFileImage *objectFileImage)
{
+ // <rdar://problem/51812762> NSCreatObjectFileImageFromMemory fail opaquely if Hardened runtime is enabled
+ uint32_t flags;
+ if ( csops(0, CS_OPS_STATUS, &flags, sizeof(flags)) != -1 ) {
+ if ( (flags & (CS_ENFORCEMENT|CS_KILL)) == (CS_ENFORCEMENT|CS_KILL) ) {
+ //fprintf(stderr, "dyld: warning: NSCreatObjectFileImageFromMemory() cannot be used in harden process 0x%08X\n", flags);
+ return NSObjectFileImageAccess;
+ }
+ }
+
if ( gUseDyld3 )
return dyld3::NSCreateObjectFileImageFromMemory(address, size, objectFileImage);
@@ -1054,6 +1047,9 @@
void** address,
NSModule* module)
{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_lookup_and_bind(symbol_name, address, module);
+
DYLD_LOCK_THIS_BLOCK;
static void (*p)(const char*, void** , NSModule*) = NULL;
@@ -1308,17 +1304,23 @@
// SPI in Mac OS X 10.6
intptr_t _dyld_get_image_slide(const struct mach_header* mh)
{
- if ( gUseDyld3 )
- return dyld3::_dyld_get_image_slide(mh);
-
- DYLD_NO_LOCK_THIS_BLOCK;
- static intptr_t (*p)(const struct mach_header*) = NULL;
-
- if(p == NULL)
- _dyld_func_lookup("__dyld_get_image_slide", (void**)&p);
- return(p(mh));
-}
-
+ // always use dyld3 version because it does better error handling
+ return dyld3::_dyld_get_image_slide(mh);
+}
+
+const struct mach_header *
+_dyld_get_prog_image_header()
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_get_prog_image_header();
+
+ DYLD_LOCK_THIS_BLOCK;
+ static const struct mach_header * (*p)(void) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_get_prog_image_header", (void**)&p);
+ return p();
+}
#if DEPRECATED_APIS_SUPPORTED
bool
@@ -1372,12 +1374,11 @@
#endif // DEPRECATED_APIS_SUPPORTED
-#include <dlfcn.h>
+#include <dlfcn_private.h>
#include <stddef.h>
#include <pthread.h>
#include <stdlib.h>
#include <mach-o/dyld.h>
-#include <servers/bootstrap.h>
#include "dyldLibSystemInterface.h"
@@ -1432,6 +1433,12 @@
return (pthread_getspecific(dlerrorPerThreadKey) != NULL);
}
+#if TARGET_OS_DRIVERKIT
+static bool isLaunchdOwned()
+{
+ return false;
+}
+#else
// use non-lazy pointer to vproc_swap_integer so that lazy binding does not recurse
typedef vproc_err_t (*vswapproc)(vproc_t vp, vproc_gsk_t key,int64_t *inval, int64_t *outval);
static vswapproc swapProc = &vproc_swap_integer;
@@ -1448,6 +1455,7 @@
}
return result;
}
+#endif
static void shared_cache_missing()
{
@@ -1477,7 +1485,7 @@
&__cxa_finalize_ranges
};
-
+static const objc_opt::objc_opt_t* gObjCOpt = nullptr;
//
// during initialization of libSystem this routine will run
// and call dyld, registering the helper functions.
@@ -1487,8 +1495,21 @@
{
void (*p)(dyld::LibSystemHelpers*);
+ // Get the optimized objc pointer now that the cache is loaded
+ const dyld_all_image_infos* allInfo = _dyld_get_all_image_infos();
+ if ( allInfo != nullptr ) {
+ const DyldSharedCache* cache = (const DyldSharedCache*)(allInfo->sharedCacheBaseAddress);
+ if ( cache != nullptr )
+ gObjCOpt = cache->objcOpt();
+ }
+
if ( gUseDyld3 ) {
dyld3::gAllImages.applyInitialImages();
+#if TARGET_OS_IOS && !TARGET_OS_SIMULATOR
+ // For binaries built before 13.0, set the lookup function if they need it
+ if (dyld_get_program_sdk_version() < DYLD_PACKED_VERSION(13,0,0))
+ setLookupFunc((void*)&dyld3::compatFuncLookup);
+#endif
}
else {
_dyld_func_lookup("__dyld_register_thread_helpers", (void**)&p);
@@ -1499,45 +1520,48 @@
tlv_initializer();
}
-
-char* dlerror()
-{
- if ( gUseDyld3 )
- return dyld3::dlerror();
-
- DYLD_LOCK_THIS_BLOCK;
- static char* (*p)() = NULL;
-
- if(p == NULL)
- _dyld_func_lookup("__dyld_dlerror", (void**)&p);
- return(p());
-}
-
int dladdr(const void* addr, Dl_info* info)
{
dyld3::ScopedTimer timer(DBG_DYLD_TIMING_DLADDR, (uint64_t)addr, 0, 0);
int result = 0;
- if ( gUseDyld3 )
- return dyld3::dladdr(addr, info);
-
- DYLD_LOCK_THIS_BLOCK;
- static int (*p)(const void* , Dl_info*) = NULL;
-
- if(p == NULL)
- _dyld_func_lookup("__dyld_dladdr", (void**)&p);
- result = p(addr, info);
+ if ( gUseDyld3 ) {
+ result = dyld3::dladdr(addr, info);
+ } else {
+ DYLD_LOCK_THIS_BLOCK;
+ static int (*p)(const void* , Dl_info*) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_dladdr", (void**)&p);
+ result = p(addr, info);
+ }
timer.setData4(result);
timer.setData5(info != NULL ? info->dli_fbase : 0);
timer.setData6(info != NULL ? info->dli_saddr : 0);
- return result;
+ return result;
+}
+
+#if !TARGET_OS_DRIVERKIT
+char* dlerror()
+{
+ if ( gUseDyld3 )
+ return dyld3::dlerror();
+
+ DYLD_LOCK_THIS_BLOCK;
+ static char* (*p)() = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_dlerror", (void**)&p);
+ return(p());
}
int dlclose(void* handle)
{
dyld3::ScopedTimer timer(DBG_DYLD_TIMING_DLCLOSE, (uint64_t)handle, 0, 0);
int result = 0;
- if ( gUseDyld3 )
+ if ( gUseDyld3 ) {
+ timer.setData4(result);
return dyld3::dlclose(handle);
+ }
DYLD_LOCK_THIS_BLOCK;
static int (*p)(void* handle) = NULL;
@@ -1545,16 +1569,17 @@
if(p == NULL)
_dyld_func_lookup("__dyld_dlclose", (void**)&p);
result = p(handle);
+ timer.setData4(result);
return result;
}
-void* dlopen(const char* path, int mode)
+static void* dlopen_internal(const char* path, int mode, void* callerAddress)
{
dyld3::ScopedTimer timer(DBG_DYLD_TIMING_DLOPEN, path, mode, 0);
void* result = nullptr;
-
if ( gUseDyld3 ) {
- result = dyld3::dlopen_internal(path, mode, __builtin_return_address(0));
+ result = dyld3::dlopen_internal(path, mode, callerAddress);
+ timer.setData4(result);
return result;
}
@@ -1565,41 +1590,40 @@
if(p == NULL)
_dyld_func_lookup("__dyld_dlopen_internal", (void**)&p);
- result = p(path, mode, __builtin_return_address(0));
+ result = p(path, mode, callerAddress);
// use asm block to prevent tail call optimization
// this is needed because dlopen uses __builtin_return_address() and depends on this glue being in the frame chain
// <rdar://problem/5313172 dlopen() looks too far up stack, can cause crash>
__asm__ volatile("");
timer.setData4(result);
-#if TARGET_OS_OSX
- // HACK for iOSMac bringup rdar://40945421
- if ( result == nullptr && dyld_get_active_platform() == PLATFORM_IOSMAC && csr_check(CSR_ALLOW_APPLE_INTERNAL) == 0) {
- if (hasPerThreadBufferFor_dlerror()) {
- // first char of buffer is flag whether string (starting at second char) is valid
- char* buffer = getPerThreadBufferFor_dlerror(2);
-
- if ( buffer[0] != '\0' && (strstr(&buffer[1], "macOS dylib cannot be loaded into iOSMac process")
- || strstr(&buffer[1], "mach-o, but not built for iOSMac")) ) {
- // if valid buffer and contains an iOSMac issue
- fprintf(stderr, "dyld: iOSMac ERROR: process attempted to dlopen() dylib with macOS dependency: \n");
- fprintf(stderr, "\tdlerror: %s\n", &buffer[1]);
- fprintf(stderr, "\tBacktrace:\n");
-
- void* stackPointers[128];
- int stackPointersCnt = backtrace(stackPointers, 128);
- char** symbolicatedStack = backtrace_symbols(stackPointers, stackPointersCnt);
- for (int32_t i = 0; i < stackPointersCnt; ++i) {
- fprintf(stderr, "\t\t%s\n", symbolicatedStack[i]);
- }
- free(symbolicatedStack);
- }
- }
- }
+ return result;
+}
+
+void* dlopen(const char* path, int mode)
+{
+ void* result = dlopen_internal(path, mode, __builtin_return_address(0));
+ if ( result )
+ return result;
+
+
+ return nullptr;
+}
+
+void* dlopen_from(const char* path, int mode, void* addressInCaller)
+{
+#if __has_feature(ptrauth_calls)
+ addressInCaller = __builtin_ptrauth_strip(addressInCaller, ptrauth_key_asia);
#endif
-
- return result;
-}
+ return dlopen_internal(path, mode, addressInCaller);
+}
+
+#if !__i386__
+void* dlopen_audited(const char* path, int mode)
+{
+ return dlopen(path, mode);
+}
+#endif // !__i386__
bool dlopen_preflight(const char* path)
{
@@ -1608,6 +1632,7 @@
if ( gUseDyld3 ) {
result = dyld3::dlopen_preflight_internal(path);
+ timer.setData4(result);
return result;
}
@@ -1628,6 +1653,7 @@
if ( gUseDyld3 ) {
result = dyld3::dlsym_internal(handle, symbol, __builtin_return_address(0));
+ timer.setData4(result);
return result;
}
@@ -1640,6 +1666,8 @@
timer.setData4(result);
return result;
}
+#endif // !TARGET_OS_DRIVERKIT
+
const struct dyld_all_image_infos* _dyld_get_all_image_infos()
{
@@ -1750,6 +1778,60 @@
return p(length);
}
+bool _dyld_shared_cache_optimized()
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_shared_cache_optimized();
+
+ const dyld_all_image_infos* allInfo = _dyld_get_all_image_infos();
+ if ( allInfo != nullptr ) {
+ const dyld_cache_header* cacheHeader = (dyld_cache_header*)(allInfo->sharedCacheBaseAddress);
+ if ( cacheHeader != nullptr )
+ return (cacheHeader->cacheType == kDyldSharedCacheTypeProduction);
+ }
+ return false;
+}
+
+bool _dyld_shared_cache_is_locally_built()
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_shared_cache_is_locally_built();
+
+ const dyld_all_image_infos* allInfo = _dyld_get_all_image_infos();
+ if ( allInfo != nullptr ) {
+ const dyld_cache_header* cacheHeader = (dyld_cache_header*)(allInfo->sharedCacheBaseAddress);
+ if ( cacheHeader != nullptr )
+ return (cacheHeader->locallyBuiltCache == 1);
+ }
+ return false;
+}
+
+const char* _dyld_shared_cache_real_path(const char* path)
+{
+ const dyld_all_image_infos* allInfo = _dyld_get_all_image_infos();
+ if ( allInfo != nullptr ) {
+ const DyldSharedCache* cache = (const DyldSharedCache*)(allInfo->sharedCacheBaseAddress);
+ if ( cache != nullptr )
+ return cache->getCanonicalPath(path);
+ }
+ return nullptr;
+}
+
+bool _dyld_shared_cache_contains_path(const char* path)
+{
+ return _dyld_shared_cache_real_path(path) != nullptr;
+}
+
+
+uint32_t _dyld_launch_mode()
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_launch_mode();
+
+ // in dyld2 mode all flag bits are zero
+ return 0;
+}
+
void _dyld_images_for_addresses(unsigned count, const void* addresses[], struct dyld_image_uuid_offset infos[])
{
if ( gUseDyld3 )
@@ -1776,6 +1858,24 @@
return p(func);
}
+void _dyld_register_for_bulk_image_loads(void (*func)(unsigned imageCount, const struct mach_header* mhs[], const char* paths[]))
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_register_for_bulk_image_loads(func);
+
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static const void (*p)(void (*)(unsigned imageCount, const mach_header* mhs[], const char* paths[])) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_register_for_bulk_image_loads", (void**)&p);
+ return p(func);
+}
+
+bool dyld_need_closure(const char* execPath, const char* dataContainerRootDir)
+{
+ return dyld3::dyld_need_closure(execPath, dataContainerRootDir);
+}
+
bool dyld_process_is_restricted()
{
if ( gUseDyld3 )
@@ -1802,6 +1902,26 @@
return p();
}
+bool dyld_has_inserted_or_interposing_libraries()
+{
+ if ( gUseDyld3 )
+ return dyld3::dyld_has_inserted_or_interposing_libraries();
+
+ DYLD_NO_LOCK_THIS_BLOCK;
+ static bool (*p)() = NULL;
+
+ if (p == NULL)
+ _dyld_func_lookup("__dyld_has_inserted_or_interposing_libraries", (void**)&p);
+ return p();
+}
+
+bool _dyld_has_fix_for_radar(const char *rdar) {
+ // There is no point in shimming this to dyld3, actual functionality can exist purely in libSystem for
+ // both dyld2 and dyld3.
+ return false;
+}
+
+
void dyld_dynamic_interpose(const struct mach_header* mh, const struct dyld_interpose_tuple array[], size_t count)
{
if ( gUseDyld3 )
@@ -1815,6 +1935,19 @@
p(mh, array, count);
}
+// SPI called __fork
+void _dyld_atfork_prepare()
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_atfork_prepare();
+}
+
+// SPI called __fork
+void _dyld_atfork_parent()
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_atfork_parent();
+}
// SPI called __fork
void _dyld_fork_child()
@@ -1835,13 +1968,13 @@
static void* mapStartOfCache(const char* path, size_t length)
{
struct stat statbuf;
- if ( ::stat(path, &statbuf) == -1 )
+ if ( dyld3::stat(path, &statbuf) == -1 )
return NULL;
if ( (size_t)statbuf.st_size < length )
return NULL;
- int cache_fd = ::open(path, O_RDONLY);
+ int cache_fd = dyld3::open(path, O_RDONLY, 0);
if ( cache_fd < 0 )
return NULL;
@@ -1874,7 +2007,7 @@
if ( strlcat(cachePath, entp->d_name, PATH_MAX) >= PATH_MAX )
continue;
if ( const dyld_cache_header* cacheHeader = (dyld_cache_header*)mapStartOfCache(cachePath, 0x00100000) ) {
- if ( ::memcmp(cacheHeader->uuid, cacheUuid, 16) != 0 ) {
+ if ( (::memcmp(cacheHeader, "dyld_", 5) != 0) || (::memcmp(cacheHeader->uuid, cacheUuid, 16) != 0) ) {
// wrong uuid, unmap and keep looking
::munmap((void*)cacheHeader, 0x00100000);
}
@@ -1907,12 +2040,11 @@
}
else {
// look first is default location for cache files
- #if __IPHONE_OS_VERSION_MIN_REQUIRED
- const char* defaultSearchDir = IPHONE_DYLD_SHARED_CACHE_DIR;
- #else
- const char* defaultSearchDir = MACOSX_DYLD_SHARED_CACHE_DIR;
- #endif
- cacheHeader = findCacheInDirAndMap(cacheUuid, defaultSearchDir);
+ #if TARGET_OS_IPHONE
+ cacheHeader = findCacheInDirAndMap(cacheUuid, IPHONE_DYLD_SHARED_CACHE_DIR);
+ #else
+ cacheHeader = findCacheInDirAndMap(cacheUuid, MACOSX_MRM_DYLD_SHARED_CACHE_DIR);
+ #endif
// if not there, look in extra search locations
if ( cacheHeader == NULL ) {
for (const char** p = extraSearchDirs; *p != NULL; ++p) {
@@ -1926,7 +2058,7 @@
if ( cacheHeader == NULL )
return -1;
- if ( cacheHeader->mappingOffset < sizeof(dyld_cache_header) ) {
+ if ( cacheHeader->mappingOffset <= __offsetof(dyld_cache_header, imagesTextOffset) ) {
// old cache without imagesText array
if ( needToUnmap )
::munmap((void*)cacheHeader, 0x00100000);
@@ -1994,5 +2126,110 @@
p(mapped, init, unmapped);
}
-
-
+void _dyld_missing_symbol_abort()
+{
+ return dyld3::_dyld_missing_symbol_abort();
+}
+
+const char* _dyld_get_objc_selector(const char* selName)
+{
+ // Check the shared cache table if it exists.
+ if ( gObjCOpt != nullptr ) {
+ if ( const objc_opt::objc_selopt_t* selopt = gObjCOpt->selopt() ) {
+ const char* name = selopt->get(selName);
+ if (name != nullptr)
+ return name;
+ }
+ }
+
+ if ( gUseDyld3 )
+ return dyld3::_dyld_get_objc_selector(selName);
+
+ return nullptr;
+}
+
+void _dyld_for_each_objc_class(const char* className,
+ void (^callback)(void* classPtr, bool isLoaded, bool* stop)) {
+ if ( gUseDyld3 )
+ return dyld3::_dyld_for_each_objc_class(className, callback);
+}
+
+void _dyld_for_each_objc_protocol(const char* protocolName,
+ void (^callback)(void* protocolPtr, bool isLoaded, bool* stop)) {
+ if ( gUseDyld3 )
+ return dyld3::_dyld_for_each_objc_protocol(protocolName, callback);
+}
+
+void _dyld_register_driverkit_main(void (*mainFunc)(void))
+{
+ if ( gUseDyld3 )
+ return dyld3::_dyld_register_driverkit_main(mainFunc);
+
+ static bool (*p)(void (*mainFunc)(void)) = NULL;
+
+ if(p == NULL)
+ _dyld_func_lookup("__dyld_register_driverkit_main", (void**)&p);
+ p(mainFunc);
+}
+
+// This is populated in the shared cache builder, so that the ranges are protected by __DATA_CONST
+// If we have a root, we can find this range in the shared cache libdyld at runtime
+typedef std::pair<const uint8_t*, const uint8_t*> ObjCConstantRange;
+
+#if TARGET_OS_OSX
+__attribute__((section(("__DATA, __objc_ranges"))))
+#else
+__attribute__((section(("__DATA_CONST, __objc_ranges"))))
+#endif
+__attribute__((used))
+static ObjCConstantRange gSharedCacheObjCConstantRanges[dyld_objc_string_kind + 1];
+
+static std::pair<const void*, uint64_t> getDyldCacheConstantRanges() {
+ const dyld_all_image_infos* allInfo = _dyld_get_all_image_infos();
+ if ( allInfo != nullptr ) {
+ const DyldSharedCache* cache = (const DyldSharedCache*)(allInfo->sharedCacheBaseAddress);
+ if ( cache != nullptr ) {
+ return cache->getObjCConstantRange();
+ }
+ }
+ return { nullptr, 0 };
+}
+
+bool _dyld_is_objc_constant(DyldObjCConstantKind kind, const void* addr) {
+ assert(kind <= dyld_objc_string_kind);
+ // The common case should be that the value is in range, as this is a security
+ // check, so first test against the values in the struct. If we have a root then
+ // we'll take the slow path later
+ if ( (addr >= gSharedCacheObjCConstantRanges[kind].first) && (addr < gSharedCacheObjCConstantRanges[kind].second) ) {
+ // Make sure that we are pointing at the start of a constant object, not in to the middle of it
+ uint64_t offset = (uint64_t)addr - (uint64_t)gSharedCacheObjCConstantRanges[kind].first;
+ return (offset % (uint64_t)DyldSharedCache::ConstantClasses::cfStringAtomSize) == 0;
+ }
+
+ // If we are in the shared cache, then the above check was sufficient, so this really isn't a valid constant address
+ extern void* __dso_handle;
+ const dyld3::MachOAnalyzer* ma = (const dyld3::MachOAnalyzer*)&__dso_handle;
+ if ( ma->inDyldCache() )
+ return false;
+
+ // We now know we are a root, so use the pointers in the shared cache libdyld version of gSharedCacheObjCConstantRanges
+ static std::pair<const void*, uint64_t> sharedCacheRanges = { nullptr, ~0ULL };
+
+ // FIXME: Should we fold this in as an inititalizer above?
+ // That would mean we need to link against somewhere to get ___cxa_guard_acquire/___cxa_guard_release
+ if ( sharedCacheRanges.second == ~0ULL )
+ sharedCacheRanges = getDyldCacheConstantRanges();
+
+ // We have the range of the section in libdyld in the shared cache, now get an array of ranges from it
+ uint64_t numRanges = sharedCacheRanges.second / sizeof(ObjCConstantRange);
+ if ( kind >= numRanges )
+ return false;
+
+ const ObjCConstantRange* rangeArrayBase = (const ObjCConstantRange*)sharedCacheRanges.first;
+ if ( (addr >= rangeArrayBase[kind].first) && (addr < rangeArrayBase[kind].second) ) {
+ // Make sure that we are pointing at the start of a constant object, not in to the middle of it
+ uint64_t offset = (uint64_t)addr - (uint64_t)rangeArrayBase[kind].first;
+ return (offset % (uint64_t)DyldSharedCache::ConstantClasses::cfStringAtomSize) == 0;
+ }
+ return false;
+}