dyldAPIsInLibSystem.cpp [plain text]
#include <stddef.h>
#include <string.h>
#include <malloc/malloc.h>
#include <sys/mman.h>
#include <execinfo.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 <fcntl.h>
#include <System/sys/codesign.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 "APIs.h"
#include "AllImages.h"
#include "StartGlue.h"
#include "Tracing.h"
extern "C" {
const struct dyld_all_image_infos* _dyld_get_all_image_infos() __attribute__((visibility("hidden")));
}
extern "C" int __cxa_atexit(void (*func)(void *), void *arg, void *dso);
extern "C" void __cxa_finalize(const void *dso);
extern "C" void __cxa_finalize_ranges(const struct __cxa_range_t ranges[], int count);
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;
#if __IPHONE_OS_VERSION_MIN_REQUIRED || TARGET_OS_DRIVERKIT
#define DEPRECATED_APIS_SUPPORTED 0
#else
#define DEPRECATED_APIS_SUPPORTED 1
#endif
static
bool
names_match(
const char *install_name,
const char* libraryName)
{
const char *basename;
unsigned long n;
basename = strrchr(install_name, '/');
if(basename == NULL)
basename = install_name;
else
basename++;
if(strcmp(basename, libraryName) == 0)
return true;
if(strncmp(basename, "lib", 3) ==0){
n = strlen(libraryName);
if(strncmp(basename+3, libraryName, n) == 0){
if(strncmp(basename+3+n, ".dylib", 6) == 0)
return true;
if(basename[3+n] == '.' &&
basename[3+n+1] != '\0' &&
strncmp(basename+3+n+2, ".dylib", 6) == 0)
return true;
}
}
return false;
}
#if DEPRECATED_APIS_SUPPORTED
void NSInstallLinkEditErrorHandlers(
const NSLinkEditErrorHandlers* handlers)
{
if ( gUseDyld3 )
return dyld3::NSInstallLinkEditErrorHandlers(handlers);
DYLD_LOCK_THIS_BLOCK;
typedef void (*ucallback_t)(const char* symbol_name);
typedef NSModule (*mcallback_t)(NSSymbol s, NSModule old, NSModule newhandler);
typedef void (*lcallback_t)(NSLinkEditErrors c, int errorNumber,
const char* fileName, const char* errorString);
static void (*p)(ucallback_t undefined, mcallback_t multiple, lcallback_t linkEdit) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_install_handlers", (void**)&p);
mcallback_t m = handlers->multiple;
p(handlers->undefined, m, handlers->linkEdit);
}
const char*
NSNameOfModule(
NSModule module)
{
if ( gUseDyld3 )
return dyld3::NSNameOfModule(module);
DYLD_LOCK_THIS_BLOCK;
static const char* (*p)(NSModule module) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSNameOfModule", (void**)&p);
return(p(module));
}
const char*
NSLibraryNameForModule(
NSModule module)
{
if ( gUseDyld3 )
return dyld3::NSLibraryNameForModule(module);
DYLD_LOCK_THIS_BLOCK;
static const char* (*p)(NSModule module) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSLibraryNameForModule", (void**)&p);
return(p(module));
}
bool
NSIsSymbolNameDefined(
const char* symbolName)
{
if ( gUseDyld3 )
return dyld3::NSIsSymbolNameDefined(symbolName);
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const char* symbolName) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSIsSymbolNameDefined", (void**)&p);
return(p(symbolName));
}
bool
NSIsSymbolNameDefinedWithHint(
const char* symbolName,
const char* libraryNameHint)
{
if ( gUseDyld3 )
return dyld3::NSIsSymbolNameDefinedWithHint(symbolName, libraryNameHint);
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const char* symbolName,
const char* libraryNameHint) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSIsSymbolNameDefinedWithHint", (void**)&p);
return(p(symbolName, libraryNameHint));
}
bool
NSIsSymbolNameDefinedInImage(
const struct mach_header *image,
const char* symbolName)
{
if ( gUseDyld3 )
return dyld3::NSIsSymbolNameDefinedInImage(image, symbolName);
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const struct mach_header *image,
const char* symbolName) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSIsSymbolNameDefinedInImage", (void**)&p);
return(p(image, symbolName));
}
NSSymbol
NSLookupAndBindSymbol(
const char* symbolName)
{
if ( gUseDyld3 )
return dyld3::NSLookupAndBindSymbol(symbolName);
DYLD_LOCK_THIS_BLOCK;
static NSSymbol (*p)(const char* symbolName) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSLookupAndBindSymbol", (void**)&p);
return(p(symbolName));
}
NSSymbol
NSLookupAndBindSymbolWithHint(
const char* symbolName,
const char* libraryNameHint)
{
if ( gUseDyld3 )
return dyld3::NSLookupAndBindSymbolWithHint(symbolName, libraryNameHint);
DYLD_LOCK_THIS_BLOCK;
static NSSymbol (*p)(const char* symbolName,
const char* libraryNameHint) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSLookupAndBindSymbolWithHint", (void**)&p);
return(p(symbolName, libraryNameHint));
}
NSSymbol
NSLookupSymbolInModule(
NSModule module,
const char* symbolName)
{
if ( gUseDyld3 )
return dyld3::NSLookupSymbolInModule(module, symbolName);
DYLD_LOCK_THIS_BLOCK;
static NSSymbol (*p)(NSModule module, const char* symbolName) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSLookupSymbolInModule", (void**)&p);
return(p(module, symbolName));
}
NSSymbol
NSLookupSymbolInImage(
const struct mach_header *image,
const char* symbolName,
uint32_t options)
{
if ( gUseDyld3 )
return dyld3::NSLookupSymbolInImage(image, symbolName, options);
DYLD_LOCK_THIS_BLOCK;
static NSSymbol (*p)(const struct mach_header *image,
const char* symbolName,
uint32_t options) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSLookupSymbolInImage", (void**)&p);
return(p(image, symbolName, options));
}
const char*
NSNameOfSymbol(
NSSymbol symbol)
{
if ( gUseDyld3 )
return dyld3::NSNameOfSymbol(symbol);
DYLD_LOCK_THIS_BLOCK;
static char * (*p)(NSSymbol symbol) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSNameOfSymbol",(void**)&p);
return(p(symbol));
}
void *
NSAddressOfSymbol(
NSSymbol symbol)
{
if ( gUseDyld3 )
return dyld3::NSAddressOfSymbol(symbol);
DYLD_LOCK_THIS_BLOCK;
static void * (*p)(NSSymbol symbol) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSAddressOfSymbol", (void**)&p);
return(p(symbol));
}
NSModule
NSModuleForSymbol(
NSSymbol symbol)
{
if ( gUseDyld3 )
return dyld3::NSModuleForSymbol(symbol);
DYLD_LOCK_THIS_BLOCK;
static NSModule (*p)(NSSymbol symbol) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSModuleForSymbol", (void**)&p);
return(p(symbol));
}
bool
NSAddLibrary(
const char* pathName)
{
if ( gUseDyld3 )
return dyld3::NSAddLibrary(pathName);
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const char* pathName) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSAddLibrary", (void**)&p);
return(p(pathName));
}
bool
NSAddLibraryWithSearching(
const char* pathName)
{
if ( gUseDyld3 )
return dyld3::NSAddLibrary(pathName);
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const char* pathName) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSAddLibraryWithSearching", (void**)&p);
return(p(pathName));
}
const struct mach_header *
NSAddImage(
const char* image_name,
uint32_t options)
{
if ( gUseDyld3 )
return dyld3::NSAddImage(image_name, options);
DYLD_LOCK_THIS_BLOCK;
static const struct mach_header * (*p)(const char* image_name,
uint32_t options) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSAddImage", (void**)&p);
return(p(image_name, options));
}
#endif // DEPRECATED_APIS_SUPPORTED
int32_t NSVersionOfLinkTimeLibrary(const char* libraryName)
{
if ( gUseDyld3 )
return dyld3::NSVersionOfLinkTimeLibrary(libraryName);
#if __LP64__
static mach_header_64* mh = NULL;
#else
static mach_header* mh = NULL;
#endif
if ( mh == NULL )
mh = _NSGetMachExecuteHeader();
#if __LP64__
const load_command* lc = (load_command*)((char*)mh + sizeof(mach_header_64));
#else
const load_command* lc = (load_command*)((char*)mh + sizeof(mach_header));
#endif
for(uint32_t i = 0; i < mh->ncmds; i++){
switch ( lc->cmd ) {
case LC_LOAD_DYLIB:
case LC_LOAD_WEAK_DYLIB:
case LC_LOAD_UPWARD_DYLIB:
const dylib_command* dl = (dylib_command *)lc;
const char* install_name = (char*)dl + dl->dylib.name.offset;
if ( names_match(install_name, libraryName) )
return dl->dylib.current_version;
break;
}
lc = (load_command*)((char*)lc + lc->cmdsize);
}
return (-1);
}
int32_t NSVersionOfRunTimeLibrary(const char* libraryName)
{
if ( gUseDyld3 )
return dyld3::NSVersionOfRunTimeLibrary(libraryName);
uint32_t n = _dyld_image_count();
for(uint32_t i = 0; i < n; i++){
const mach_header* mh = _dyld_get_image_header(i);
if ( mh == NULL )
continue;
if ( mh->filetype != MH_DYLIB )
continue;
#if __LP64__
const load_command* lc = (load_command*)((char*)mh + sizeof(mach_header_64));
#else
const load_command* lc = (load_command*)((char*)mh + sizeof(mach_header));
#endif
for(uint32_t j = 0; j < mh->ncmds; j++){
if ( lc->cmd == LC_ID_DYLIB ) {
const dylib_command* dl = (dylib_command*)lc;
const char* install_name = (char *)dl + dl->dylib.name.offset;
if ( names_match(install_name, libraryName) )
return dl->dylib.current_version;
}
lc = (load_command*)((char*)lc + lc->cmdsize);
}
}
return (-1);
}
#if TARGET_OS_WATCH
uint32_t dyld_get_program_sdk_watch_os_version()
{
if (gUseDyld3)
return dyld3::dyld_get_program_sdk_watch_os_version();
__block uint32_t retval = 0;
__block bool versionFound = false;
dyld3::dyld_get_image_versions((mach_header*)_NSGetMachExecuteHeader(), ^(dyld_platform_t platform, uint32_t sdk_version, uint32_t min_version) {
if (versionFound) return;
if (dyld_get_base_platform(platform) == PLATFORM_WATCHOS) {
versionFound = true;
retval = sdk_version;
}
});
return retval;
}
uint32_t dyld_get_program_min_watch_os_version()
{
if (gUseDyld3)
return dyld3::dyld_get_program_min_watch_os_version();
__block uint32_t retval = 0;
__block bool versionFound = false;
dyld3::dyld_get_image_versions((mach_header*)_NSGetMachExecuteHeader(), ^(dyld_platform_t platform, uint32_t sdk_version, uint32_t min_version) {
if (versionFound) return;
if (dyld_get_base_platform(platform) == PLATFORM_WATCHOS) {
versionFound = true;
retval = min_version;
}
});
return retval;
}
#endif
#if TARGET_OS_BRIDGE
uint32_t dyld_get_program_sdk_bridge_os_version()
{
if (gUseDyld3)
return dyld3::dyld_get_program_sdk_bridge_os_version();
__block uint32_t retval = 0;
__block bool versionFound = false;
dyld3::dyld_get_image_versions((mach_header*)_NSGetMachExecuteHeader(), ^(dyld_platform_t platform, uint32_t sdk_version, uint32_t min_version) {
if (versionFound) return;
if (dyld_get_base_platform(platform) == PLATFORM_BRIDGEOS) {
versionFound = true;
retval = sdk_version;
}
});
return retval;
}
uint32_t dyld_get_program_min_bridge_os_version()
{
if (gUseDyld3)
return dyld3::dyld_get_program_min_bridge_os_version();
__block uint32_t retval = 0;
__block bool versionFound = false;
dyld3::dyld_get_image_versions((mach_header*)_NSGetMachExecuteHeader(), ^(dyld_platform_t platform, uint32_t sdk_version, uint32_t min_version) {
if (versionFound) return;
if (dyld_get_base_platform(platform) == PLATFORM_BRIDGEOS) {
versionFound = true;
retval = min_version;
}
});
return retval;
}
#endif
uint32_t dyld_get_sdk_version(const mach_header* mh)
{
return dyld3::dyld_get_sdk_version(mh);
}
uint32_t dyld_get_program_sdk_version()
{
return dyld3::dyld_get_sdk_version((mach_header*)_NSGetMachExecuteHeader());
}
uint32_t dyld_get_min_os_version(const struct mach_header* mh)
{
return dyld3::dyld_get_min_os_version(mh);
}
uint32_t dyld_get_program_min_os_version()
{
return dyld3::dyld_get_min_os_version((mach_header*)_NSGetMachExecuteHeader());
}
bool _dyld_get_image_uuid(const struct mach_header* mh, uuid_t uuid)
{
if ( gUseDyld3 )
return dyld3::_dyld_get_image_uuid(mh, uuid);
const load_command* startCmds = NULL;
if ( mh->magic == MH_MAGIC_64 )
startCmds = (load_command*)((char *)mh + sizeof(mach_header_64));
else if ( mh->magic == MH_MAGIC )
startCmds = (load_command*)((char *)mh + sizeof(mach_header));
else
return false;
const load_command* const cmdsEnd = (load_command*)((char*)startCmds + mh->sizeofcmds);
const load_command* cmd = startCmds;
for(uint32_t i = 0; i < mh->ncmds; ++i) {
const load_command* nextCmd = (load_command*)((char *)cmd + cmd->cmdsize);
if ( (cmd->cmdsize < 8) || (nextCmd > cmdsEnd) || (nextCmd < startCmds)) {
return false;
}
if ( cmd->cmd == LC_UUID ) {
const uuid_command* uuidCmd = (uuid_command*)cmd;
memcpy(uuid, uuidCmd->uuid, 16);
return true;
}
cmd = nextCmd;
}
bzero(uuid, 16);
return false;
}
dyld_platform_t dyld_get_active_platform(void) {
if (gUseDyld3) { return dyld3::dyld_get_active_platform(); }
if (_dyld_get_all_image_infos()->version >= 16) { return (dyld_platform_t)_dyld_get_all_image_infos()->platform; }
__block dyld_platform_t result;
dyld3::dyld_get_image_versions((mach_header*)_NSGetMachExecuteHeader(), ^(dyld_platform_t platform, uint32_t sdk_version, uint32_t min_version) {
result = platform;
});
return result;
}
dyld_platform_t dyld_get_base_platform(dyld_platform_t platform) {
return dyld3::dyld_get_base_platform(platform);
}
bool dyld_is_simulator_platform(dyld_platform_t platform) {
return dyld3::dyld_is_simulator_platform(platform);
}
bool dyld_sdk_at_least(const struct mach_header* mh, dyld_build_version_t version) {
return dyld3::dyld_sdk_at_least(mh, version);
}
bool dyld_minos_at_least(const struct mach_header* mh, dyld_build_version_t version) {
return dyld3::dyld_minos_at_least(mh, version);
}
bool dyld_program_sdk_at_least(dyld_build_version_t version) {
return dyld3::dyld_sdk_at_least((mach_header*)_NSGetMachExecuteHeader(),version);
}
bool dyld_program_minos_at_least(dyld_build_version_t version) {
return dyld3::dyld_minos_at_least((mach_header*)_NSGetMachExecuteHeader(), version);
}
void dyld_get_image_versions(const struct mach_header* mh, void (^callback)(dyld_platform_t platform, uint32_t sdk_version, uint32_t min_version)) {
dyld3::dyld_get_image_versions(mh, callback);
}
#if DEPRECATED_APIS_SUPPORTED
NSObjectFileImageReturnCode
NSCreateObjectFileImageFromFile(
const char* pathName,
NSObjectFileImage *objectFileImage)
{
if ( gUseDyld3 )
return dyld3::NSCreateObjectFileImageFromFile(pathName, objectFileImage);
DYLD_LOCK_THIS_BLOCK;
static NSObjectFileImageReturnCode (*p)(const char*, NSObjectFileImage*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSCreateObjectFileImageFromFile", (void**)&p);
return p(pathName, objectFileImage);
}
NSObjectFileImageReturnCode
NSCreateObjectFileImageFromMemory(
const void* address,
size_t size,
NSObjectFileImage *objectFileImage)
{
uint32_t flags;
if ( csops(0, CS_OPS_STATUS, &flags, sizeof(flags)) != -1 ) {
if ( (flags & (CS_ENFORCEMENT|CS_KILL)) == (CS_ENFORCEMENT|CS_KILL) ) {
return NSObjectFileImageAccess;
}
}
if ( gUseDyld3 )
return dyld3::NSCreateObjectFileImageFromMemory(address, size, objectFileImage);
DYLD_LOCK_THIS_BLOCK;
static NSObjectFileImageReturnCode (*p)(const void*, size_t, NSObjectFileImage*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSCreateObjectFileImageFromMemory", (void**)&p);
return p(address, size, objectFileImage);
}
#if OBSOLETE_DYLD_API
NSObjectFileImageReturnCode
NSCreateCoreFileImageFromFile(
const char* pathName,
NSObjectFileImage *objectFileImage)
{
DYLD_LOCK_THIS_BLOCK;
static NSObjectFileImageReturnCode (*p)(const char*, NSObjectFileImage*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSCreateCoreFileImageFromFile", (void**)&p);
return p(pathName, objectFileImage);
}
#endif
bool
NSDestroyObjectFileImage(
NSObjectFileImage objectFileImage)
{
if ( gUseDyld3 )
return dyld3::NSDestroyObjectFileImage(objectFileImage);
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(NSObjectFileImage) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSDestroyObjectFileImage", (void**)&p);
return p(objectFileImage);
}
NSModule
NSLinkModule(
NSObjectFileImage objectFileImage,
const char* moduleName,
uint32_t options)
{
if ( gUseDyld3 )
return dyld3::NSLinkModule(objectFileImage, moduleName, options);
DYLD_LOCK_THIS_BLOCK;
static NSModule (*p)(NSObjectFileImage, const char*, unsigned long) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSLinkModule", (void**)&p);
return p(objectFileImage, moduleName, options);
}
uint32_t
NSSymbolDefinitionCountInObjectFileImage(
NSObjectFileImage objectFileImage)
{
if ( gUseDyld3 )
return dyld3::NSSymbolDefinitionCountInObjectFileImage(objectFileImage);
DYLD_LOCK_THIS_BLOCK;
static uint32_t (*p)(NSObjectFileImage) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSSymbolDefinitionCountInObjectFileImage", (void**)&p);
return p(objectFileImage);
}
const char*
NSSymbolDefinitionNameInObjectFileImage(
NSObjectFileImage objectFileImage,
uint32_t ordinal)
{
if ( gUseDyld3 )
return dyld3::NSSymbolDefinitionNameInObjectFileImage(objectFileImage, ordinal);
DYLD_LOCK_THIS_BLOCK;
static const char* (*p)(NSObjectFileImage, uint32_t) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSSymbolDefinitionNameInObjectFileImage", (void**)&p);
return p(objectFileImage, ordinal);
}
uint32_t
NSSymbolReferenceCountInObjectFileImage(
NSObjectFileImage objectFileImage)
{
if ( gUseDyld3 )
return dyld3::NSSymbolReferenceCountInObjectFileImage(objectFileImage);
DYLD_LOCK_THIS_BLOCK;
static uint32_t (*p)(NSObjectFileImage) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSSymbolReferenceCountInObjectFileImage", (void**)&p);
return p(objectFileImage);
}
const char*
NSSymbolReferenceNameInObjectFileImage(
NSObjectFileImage objectFileImage,
uint32_t ordinal,
bool *tentative_definition)
{
if ( gUseDyld3 )
return dyld3::NSSymbolReferenceNameInObjectFileImage(objectFileImage, ordinal, tentative_definition);
DYLD_LOCK_THIS_BLOCK;
static const char* (*p)(NSObjectFileImage, uint32_t, bool*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSSymbolReferenceNameInObjectFileImage", (void**)&p);
return p(objectFileImage, ordinal, tentative_definition);
}
bool
NSIsSymbolDefinedInObjectFileImage(
NSObjectFileImage objectFileImage,
const char* symbolName)
{
if ( gUseDyld3 )
return dyld3::NSIsSymbolDefinedInObjectFileImage(objectFileImage, symbolName);
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(NSObjectFileImage, const char*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSIsSymbolDefinedInObjectFileImage", (void**)&p);
return p(objectFileImage, symbolName);
}
void *
NSGetSectionDataInObjectFileImage(
NSObjectFileImage objectFileImage,
const char* segmentName,
const char* sectionName,
unsigned long *size)
{
if ( gUseDyld3 )
return dyld3::NSGetSectionDataInObjectFileImage(objectFileImage, segmentName, sectionName, size);
DYLD_LOCK_THIS_BLOCK;
static void* (*p)(NSObjectFileImage, const char*, const char*, unsigned long*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_NSGetSectionDataInObjectFileImage", (void**)&p);
return p(objectFileImage, segmentName, sectionName, size);
}
void
NSLinkEditError(
NSLinkEditErrors *c,
int *errorNumber,
const char* *fileName,
const char* *errorString)
{
if ( gUseDyld3 )
return dyld3::NSLinkEditError(c, errorNumber, fileName, errorString);
DYLD_LOCK_THIS_BLOCK;
static void (*p)(NSLinkEditErrors *c,
int *errorNumber,
const char* *fileName,
const char* *errorString) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_link_edit_error", (void**)&p);
if(p != NULL)
p(c, errorNumber, fileName, errorString);
}
bool
NSUnLinkModule(
NSModule module,
uint32_t options)
{
if ( gUseDyld3 )
return dyld3::NSUnLinkModule(module, options);
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(NSModule module, uint32_t options) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_unlink_module", (void**)&p);
return p(module, options);
}
#if OBSOLETE_DYLD_API
NSModule
NSReplaceModule(
NSModule moduleToReplace,
NSObjectFileImage newObjectFileImage,
uint32_t options)
{
return(NULL);
}
#endif
#endif // DEPRECATED_APIS_SUPPORTED
int
_NSGetExecutablePath(
char *buf,
uint32_t *bufsize)
{
if ( gUseDyld3 )
return dyld3::_NSGetExecutablePath(buf, bufsize);
DYLD_NO_LOCK_THIS_BLOCK;
static int (*p)(char *buf, uint32_t *bufsize) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld__NSGetExecutablePath", (void**)&p);
return(p(buf, bufsize));
}
#if DEPRECATED_APIS_SUPPORTED
void
_dyld_lookup_and_bind(
const char* symbol_name,
void** address,
NSModule* module)
{
DYLD_LOCK_THIS_BLOCK;
static void (*p)(const char*, void** , NSModule*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_lookup_and_bind", (void**)&p);
p(symbol_name, address, module);
}
void
_dyld_lookup_and_bind_with_hint(
const char* symbol_name,
const char* library_name_hint,
void** address,
NSModule* module)
{
DYLD_LOCK_THIS_BLOCK;
static void (*p)(const char*, const char*, void**, NSModule*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_lookup_and_bind_with_hint", (void**)&p);
p(symbol_name, library_name_hint, address, module);
}
#if OBSOLETE_DYLD_API
void
_dyld_lookup_and_bind_objc(
const char* symbol_name,
void** address,
NSModule* module)
{
DYLD_LOCK_THIS_BLOCK;
static void (*p)(const char* , void**, NSModule*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_lookup_and_bind_objc", (void**)&p);
p(symbol_name, address, module);
}
#endif
void
_dyld_lookup_and_bind_fully(
const char* symbol_name,
void** address,
NSModule* module)
{
DYLD_LOCK_THIS_BLOCK;
static void (*p)(const char*, void**, NSModule*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_lookup_and_bind_fully", (void**)&p);
p(symbol_name, address, module);
}
bool
_dyld_bind_fully_image_containing_address(
const void* address)
{
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const void*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_bind_fully_image_containing_address", (void**)&p);
return p(address);
}
#endif // DEPRECATED_APIS_SUPPORTED
void
_dyld_register_func_for_add_image(
void (*func)(const struct mach_header *mh, intptr_t vmaddr_slide))
{
if ( gUseDyld3 )
return dyld3::_dyld_register_func_for_add_image(func);
DYLD_LOCK_THIS_BLOCK;
typedef void (*callback_t)(const struct mach_header *mh, intptr_t vmaddr_slide);
static void (*p)(callback_t func) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_register_func_for_add_image", (void**)&p);
p(func);
}
void
_dyld_register_func_for_remove_image(
void (*func)(const struct mach_header *mh, intptr_t vmaddr_slide))
{
if ( gUseDyld3 )
return dyld3::_dyld_register_func_for_remove_image(func);
DYLD_LOCK_THIS_BLOCK;
typedef void (*callback_t)(const struct mach_header *mh, intptr_t vmaddr_slide);
static void (*p)(callback_t func) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_register_func_for_remove_image", (void**)&p);
p(func);
}
#if OBSOLETE_DYLD_API
void
_dyld_register_func_for_link_module(
void (*func)(NSModule module))
{
DYLD_LOCK_THIS_BLOCK;
static void (*p)(void (*func)(NSModule module)) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_register_func_for_link_module", (void**)&p);
p(func);
}
void
_dyld_register_func_for_unlink_module(
void (*func)(NSModule module))
{
DYLD_LOCK_THIS_BLOCK;
static void (*p)(void (*func)(NSModule module)) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_register_func_for_unlink_module", (void**)&p);
p(func);
}
void
_dyld_register_func_for_replace_module(
void (*func)(NSModule oldmodule, NSModule newmodule))
{
DYLD_LOCK_THIS_BLOCK;
static void (*p)(void (*func)(NSModule oldmodule,
NSModule newmodule)) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_register_func_for_replace_module", (void**)&p);
p(func);
}
void
_dyld_get_objc_module_sect_for_module(
NSModule module,
void **objc_module,
unsigned long *size)
{
DYLD_LOCK_THIS_BLOCK;
static void (*p)(NSModule module,
void **objc_module,
unsigned long *size) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_get_objc_module_sect_for_module", (void**)&p);
p(module, objc_module, size);
}
#endif
#if DEPRECATED_APIS_SUPPORTED
bool
_dyld_present(void)
{
return true;
}
#endif
uint32_t
_dyld_image_count(void)
{
if ( gUseDyld3 )
return dyld3::_dyld_image_count();
DYLD_NO_LOCK_THIS_BLOCK;
static uint32_t (*p)(void) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_image_count", (void**)&p);
return(p());
}
const struct mach_header *
_dyld_get_image_header(uint32_t image_index)
{
if ( gUseDyld3 )
return dyld3::_dyld_get_image_header(image_index);
DYLD_NO_LOCK_THIS_BLOCK;
static struct mach_header * (*p)(uint32_t image_index) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_get_image_header", (void**)&p);
return(p(image_index));
}
intptr_t
_dyld_get_image_vmaddr_slide(uint32_t image_index)
{
if ( gUseDyld3 )
return dyld3::_dyld_get_image_vmaddr_slide(image_index);
DYLD_NO_LOCK_THIS_BLOCK;
static unsigned long (*p)(uint32_t image_index) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_get_image_vmaddr_slide", (void**)&p);
return(p(image_index));
}
const char*
_dyld_get_image_name(uint32_t image_index)
{
if ( gUseDyld3 )
return dyld3::_dyld_get_image_name(image_index);
DYLD_NO_LOCK_THIS_BLOCK;
static const char* (*p)(uint32_t image_index) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_get_image_name", (void**)&p);
return(p(image_index));
}
intptr_t _dyld_get_image_slide(const struct mach_header* mh)
{
return dyld3::_dyld_get_image_slide(mh);
}
#if DEPRECATED_APIS_SUPPORTED
bool
_dyld_image_containing_address(const void* address)
{
if ( gUseDyld3 )
return dyld3::_dyld_image_containing_address(address);
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const void*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_image_containing_address", (void**)&p);
return(p(address));
}
const struct mach_header *
_dyld_get_image_header_containing_address(
const void* address)
{
if ( gUseDyld3 )
return dyld3::_dyld_get_image_header_containing_address(address);
DYLD_LOCK_THIS_BLOCK;
static const struct mach_header * (*p)(const void*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_get_image_header_containing_address", (void**)&p);
return p(address);
}
bool _dyld_launched_prebound(void)
{
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(void) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_launched_prebound", (void**)&p);
return(p());
}
bool _dyld_all_twolevel_modules_prebound(void)
{
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(void) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_all_twolevel_modules_prebound", (void**)&p);
return(p());
}
#endif // DEPRECATED_APIS_SUPPORTED
#include <dlfcn.h>
#include <stddef.h>
#include <pthread.h>
#include <stdlib.h>
#include <mach-o/dyld.h>
#include "dyldLibSystemInterface.h"
static pthread_key_t dlerrorPerThreadKey;
static bool dlerrorPerThreadKeyInitialized = false;
struct dlerrorPerThreadData
{
size_t sizeAllocated;
char message[1];
};
static char* getPerThreadBufferFor_dlerror(size_t sizeRequired)
{
if (!dlerrorPerThreadKeyInitialized ) {
pthread_key_create(&dlerrorPerThreadKey, &free);
dlerrorPerThreadKeyInitialized = true;
}
const size_t size = (sizeRequired < 256) ? 256 : sizeRequired;
dlerrorPerThreadData* data = (dlerrorPerThreadData*)pthread_getspecific(dlerrorPerThreadKey);
if ( data == NULL ) {
const size_t mallocSize = sizeof(dlerrorPerThreadData)+size;
data = (dlerrorPerThreadData*)malloc(mallocSize);
data->sizeAllocated = size;
pthread_setspecific(dlerrorPerThreadKey, data);
}
else if ( data->sizeAllocated < sizeRequired ) {
free(data);
const size_t mallocSize = sizeof(dlerrorPerThreadData)+size;
data = (dlerrorPerThreadData*)malloc(mallocSize);
data->sizeAllocated = size;
pthread_setspecific(dlerrorPerThreadKey, data);
}
return data->message;
}
static bool hasPerThreadBufferFor_dlerror()
{
if (!dlerrorPerThreadKeyInitialized )
return false;
return (pthread_getspecific(dlerrorPerThreadKey) != NULL);
}
#if TARGET_OS_DRIVERKIT
static bool isLaunchdOwned()
{
return false;
}
#else
typedef vproc_err_t (*vswapproc)(vproc_t vp, vproc_gsk_t key,int64_t *inval, int64_t *outval);
static vswapproc swapProc = &vproc_swap_integer;
static bool isLaunchdOwned()
{
static bool checked = false;
static bool result = false;
if ( !checked ) {
checked = true;
int64_t val = 0;
(*swapProc)(NULL, VPROC_GSK_IS_MANAGED, NULL, &val);
result = ( val != 0 );
}
return result;
}
#endif
static void shared_cache_missing()
{
}
static void shared_cache_out_of_date()
{
}
static dyld::LibSystemHelpers sHelpers = { 13, &dyldGlobalLockAcquire, &dyldGlobalLockRelease,
&getPerThreadBufferFor_dlerror, &malloc, &free, &__cxa_atexit,
&shared_cache_missing, &shared_cache_out_of_date,
NULL, NULL,
&pthread_key_create, &pthread_setspecific,
&malloc_size,
&pthread_getspecific,
&__cxa_finalize,
address_of_start,
&hasPerThreadBufferFor_dlerror,
&isLaunchdOwned,
&vm_allocate,
&mmap,
&__cxa_finalize_ranges
};
static const objc_opt::objc_opt_t* gObjCOpt = nullptr;
extern "C" void tlv_initializer();
void _dyld_initializer()
{
void (*p)(dyld::LibSystemHelpers*);
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
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);
if(p != NULL)
p(&sHelpers);
}
tlv_initializer();
}
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 ) {
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;
}
#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 ) {
timer.setData4(result);
return dyld3::dlclose(handle);
}
DYLD_LOCK_THIS_BLOCK;
static int (*p)(void* handle) = NULL;
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)
{
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));
timer.setData4(result);
return result;
}
DYLD_NO_LOCK_THIS_BLOCK;
static void* (*p)(const char* path, int, void*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_dlopen_internal", (void**)&p);
result = p(path, mode, __builtin_return_address(0));
__asm__ volatile("");
timer.setData4(result);
return result;
}
bool dlopen_preflight(const char* path)
{
dyld3::ScopedTimer timer(DBG_DYLD_TIMING_DLOPEN_PREFLIGHT, path, 0, 0);
bool result = false;
if ( gUseDyld3 ) {
result = dyld3::dlopen_preflight_internal(path);
timer.setData4(result);
return result;
}
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const char* path, void* callerAddress) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_dlopen_preflight_internal", (void**)&p);
result = p(path, __builtin_return_address(0));
timer.setData4(result);
return result;
}
void* dlsym(void* handle, const char* symbol)
{
dyld3::ScopedTimer timer(DBG_DYLD_TIMING_DLSYM, handle, symbol, 0);
void* result = nullptr;
if ( gUseDyld3 ) {
result = dyld3::dlsym_internal(handle, symbol, __builtin_return_address(0));
timer.setData4(result);
return result;
}
DYLD_LOCK_THIS_BLOCK;
static void* (*p)(void* handle, const char* symbol, void *callerAddress) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_dlsym_internal", (void**)&p);
result = p(handle, symbol, __builtin_return_address(0));
timer.setData4(result);
return result;
}
#endif // !TARGET_OS_DRIVERKIT
const struct dyld_all_image_infos* _dyld_get_all_image_infos()
{
if ( gUseDyld3 )
return dyld3::_dyld_get_all_image_infos();
DYLD_NO_LOCK_THIS_BLOCK;
static struct dyld_all_image_infos* (*p)() = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_get_all_image_infos", (void**)&p);
return p();
}
#if SUPPORT_ZERO_COST_EXCEPTIONS
bool _dyld_find_unwind_sections(void* addr, dyld_unwind_sections* info)
{
if ( gUseDyld3 )
return dyld3::_dyld_find_unwind_sections(addr, info);
DYLD_NO_LOCK_THIS_BLOCK;
static void* (*p)(void*, dyld_unwind_sections*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_find_unwind_sections", (void**)&p);
return p(addr, info);
}
#endif
#if __i386__ || __x86_64__ || __arm__ || __arm64__
__attribute__((visibility("hidden")))
void* _dyld_fast_stub_entry(void* loadercache, long lazyinfo)
{
DYLD_NO_LOCK_THIS_BLOCK;
static void* (*p)(void*, long) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_fast_stub_entry", (void**)&p);
return p(loadercache, lazyinfo);
}
#endif
const char* dyld_image_path_containing_address(const void* addr)
{
if ( gUseDyld3 )
return dyld3::dyld_image_path_containing_address(addr);
DYLD_NO_LOCK_THIS_BLOCK;
static const char* (*p)(const void*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_image_path_containing_address", (void**)&p);
return p(addr);
}
const struct mach_header* dyld_image_header_containing_address(const void* addr)
{
if ( gUseDyld3 )
return dyld3::dyld_image_header_containing_address(addr);
DYLD_NO_LOCK_THIS_BLOCK;
static const mach_header* (*p)(const void*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_get_image_header_containing_address", (void**)&p);
return p(addr);
}
bool dyld_shared_cache_some_image_overridden()
{
if ( gUseDyld3 )
return dyld3::dyld_shared_cache_some_image_overridden();
DYLD_NO_LOCK_THIS_BLOCK;
static bool (*p)() = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_shared_cache_some_image_overridden", (void**)&p);
return p();
}
bool _dyld_get_shared_cache_uuid(uuid_t uuid)
{
if ( gUseDyld3 )
return dyld3::_dyld_get_shared_cache_uuid(uuid);
DYLD_NO_LOCK_THIS_BLOCK;
static bool (*p)(uuid_t) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_get_shared_cache_uuid", (void**)&p);
return p(uuid);
}
const void* _dyld_get_shared_cache_range(size_t* length)
{
if ( gUseDyld3 )
return dyld3::_dyld_get_shared_cache_range(length);
DYLD_NO_LOCK_THIS_BLOCK;
static const void* (*p)(size_t*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_get_shared_cache_range", (void**)&p);
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;
}
void _dyld_images_for_addresses(unsigned count, const void* addresses[], struct dyld_image_uuid_offset infos[])
{
if ( gUseDyld3 )
return dyld3::_dyld_images_for_addresses(count, addresses, infos);
DYLD_NO_LOCK_THIS_BLOCK;
static const void (*p)(unsigned, const void*[], struct dyld_image_uuid_offset[]) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_images_for_addresses", (void**)&p);
return p(count, addresses, infos);
}
void _dyld_register_for_image_loads(void (*func)(const mach_header* mh, const char* path, bool unloadable))
{
if ( gUseDyld3 )
return dyld3::_dyld_register_for_image_loads(func);
DYLD_NO_LOCK_THIS_BLOCK;
static const void (*p)(void (*)(const mach_header* mh, const char* path, bool unloadable)) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_register_for_image_loads", (void**)&p);
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* tempDir)
{
return dyld3::dyld_need_closure(execPath, tempDir);
}
bool dyld_process_is_restricted()
{
if ( gUseDyld3 )
return dyld3::dyld_process_is_restricted();
DYLD_NO_LOCK_THIS_BLOCK;
static bool (*p)() = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_process_is_restricted", (void**)&p);
return p();
}
const char* dyld_shared_cache_file_path()
{
if ( gUseDyld3 )
return dyld3::dyld_shared_cache_file_path();
DYLD_NO_LOCK_THIS_BLOCK;
static const char* (*p)() = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_shared_cache_file_path", (void**)&p);
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();
}
void dyld_dynamic_interpose(const struct mach_header* mh, const struct dyld_interpose_tuple array[], size_t count)
{
if ( gUseDyld3 )
return dyld3::dyld_dynamic_interpose(mh, array, count);
DYLD_LOCK_THIS_BLOCK;
static void (*p)(const struct mach_header* mh, const struct dyld_interpose_tuple array[], size_t count) = NULL;
if (p == NULL)
_dyld_func_lookup("__dyld_dynamic_interpose", (void**)&p);
p(mh, array, count);
}
void _dyld_atfork_prepare()
{
if ( gUseDyld3 )
return dyld3::_dyld_atfork_prepare();
}
void _dyld_atfork_parent()
{
if ( gUseDyld3 )
return dyld3::_dyld_atfork_parent();
}
void _dyld_fork_child()
{
if ( gUseDyld3 )
return dyld3::_dyld_fork_child();
DYLD_NO_LOCK_THIS_BLOCK;
static void (*p)() = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_fork_child", (void**)&p);
return p();
}
static void* mapStartOfCache(const char* path, size_t length)
{
struct stat statbuf;
if ( ::stat(path, &statbuf) == -1 )
return NULL;
if ( (size_t)statbuf.st_size < length )
return NULL;
int cache_fd = ::open(path, O_RDONLY);
if ( cache_fd < 0 )
return NULL;
void* result = ::mmap(NULL, length, PROT_READ, MAP_PRIVATE, cache_fd, 0);
close(cache_fd);
if ( result == MAP_FAILED )
return NULL;
return result;
}
static const dyld_cache_header* findCacheInDirAndMap(const uuid_t cacheUuid, const char* dirPath)
{
DIR* dirp = ::opendir(dirPath);
if ( dirp != NULL) {
dirent entry;
dirent* entp = NULL;
char cachePath[PATH_MAX];
while ( ::readdir_r(dirp, &entry, &entp) == 0 ) {
if ( entp == NULL )
break;
if ( entp->d_type != DT_REG )
continue;
if ( strlcpy(cachePath, dirPath, PATH_MAX) >= PATH_MAX )
continue;
if ( strlcat(cachePath, "/", PATH_MAX) >= PATH_MAX )
continue;
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 ) {
::munmap((void*)cacheHeader, 0x00100000);
}
else {
closedir(dirp);
return cacheHeader;
}
}
}
closedir(dirp);
}
return NULL;
}
int dyld_shared_cache_find_iterate_text(const uuid_t cacheUuid, const char* extraSearchDirs[], void (^callback)(const dyld_shared_cache_dylib_text_info* info))
{
if ( gUseDyld3 )
return dyld3::dyld_shared_cache_find_iterate_text(cacheUuid, extraSearchDirs, callback);
const dyld_cache_header* cacheHeader = NULL;
bool needToUnmap = true;
const dyld_all_image_infos* allInfo = _dyld_get_all_image_infos();
if ( (allInfo != NULL) && (allInfo->sharedCacheBaseAddress != 0) && (memcmp(allInfo->sharedCacheUUID, cacheUuid, 16) == 0) ) {
cacheHeader = (dyld_cache_header*)(allInfo->sharedCacheBaseAddress);
needToUnmap = false;
}
else {
#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 ( cacheHeader == NULL ) {
for (const char** p = extraSearchDirs; *p != NULL; ++p) {
cacheHeader = findCacheInDirAndMap(cacheUuid, *p);
if ( cacheHeader != NULL )
break;
}
}
}
if ( cacheHeader == NULL )
return -1;
if ( cacheHeader->mappingOffset < sizeof(dyld_cache_header) ) {
if ( needToUnmap )
::munmap((void*)cacheHeader, 0x00100000);
return -1;
}
const dyld_cache_mapping_info* mappings = (dyld_cache_mapping_info*)((char*)cacheHeader + cacheHeader->mappingOffset);
const uint64_t cacheUnslidBaseAddress = mappings[0].address;
const dyld_cache_image_text_info* imagesText = (dyld_cache_image_text_info*)((char*)cacheHeader + cacheHeader->imagesTextOffset);
const dyld_cache_image_text_info* imagesTextEnd = &imagesText[cacheHeader->imagesTextCount];
for (const dyld_cache_image_text_info* p=imagesText; p < imagesTextEnd; ++p) {
dyld_shared_cache_dylib_text_info dylibTextInfo;
dylibTextInfo.version = 2;
dylibTextInfo.loadAddressUnslid = p->loadAddress;
dylibTextInfo.textSegmentSize = p->textSegmentSize;
dylibTextInfo.path = (char*)cacheHeader + p->pathOffset;
::memcpy(dylibTextInfo.dylibUuid, p->uuid, 16);
dylibTextInfo.textSegmentOffset = p->loadAddress - cacheUnslidBaseAddress;
callback(&dylibTextInfo);
}
if ( needToUnmap )
::munmap((void*)cacheHeader, 0x00100000);
return 0;
}
int dyld_shared_cache_iterate_text(const uuid_t cacheUuid, void (^callback)(const dyld_shared_cache_dylib_text_info* info))
{
if ( gUseDyld3 )
return dyld3::dyld_shared_cache_iterate_text(cacheUuid, callback);
const char* extraSearchDirs[] = { NULL };
return dyld_shared_cache_find_iterate_text(cacheUuid, extraSearchDirs, callback);
}
bool _dyld_is_memory_immutable(const void* addr, size_t length)
{
if ( gUseDyld3 )
return dyld3::_dyld_is_memory_immutable(addr, length);
DYLD_NO_LOCK_THIS_BLOCK;
static bool (*p)(const void*, size_t) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_is_memory_immutable", (void**)&p);
return p(addr, length);
}
void _dyld_objc_notify_register(_dyld_objc_notify_mapped mapped,
_dyld_objc_notify_init init,
_dyld_objc_notify_unmapped unmapped)
{
if ( gUseDyld3 )
return dyld3::_dyld_objc_notify_register(mapped, init, unmapped);
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(_dyld_objc_notify_mapped, _dyld_objc_notify_init, _dyld_objc_notify_unmapped) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_objc_notify_register", (void**)&p);
p(mapped, init, unmapped);
}
void _dyld_missing_symbol_abort()
{
return dyld3::_dyld_missing_symbol_abort();
}
const char* _dyld_get_objc_selector(const char* selName)
{
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))
{
static bool (*p)(void (*mainFunc)(void)) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_register_driverkit_main", (void**)&p);
p(mainFunc);
}