dyldAPIsInLibSystem.cpp [plain text]
#include <stddef.h>
#include <string.h>
#include <malloc/malloc.h>
#include <sys/mman.h>
#include <crt_externs.h>
#include <Availability.h>
#include <vproc_priv.h>
#include <dirent.h>
#include <sys/stat.h>
#include "mach-o/dyld_images.h"
#include "mach-o/dyld.h"
#include "mach-o/dyld_priv.h"
#include "dyld_cache_format.h"
#include "ImageLoader.h"
#include "dyldLock.h"
#include "start_glue.h"
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);
#ifndef LC_VERSION_MIN_MACOSX
#define LC_VERSION_MIN_MACOSX 0x24
struct version_min_command {
uint32_t cmd;
uint32_t cmdsize;
uint32_t version;
uint32_t sdk;
};
#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)
#endif
#if __IPHONE_OS_VERSION_MIN_REQUIRED
#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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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 __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)
{
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);
}
#define PACKED_VERSION(major, minor, tiny) ((((major) & 0xffff) << 16) | (((minor) & 0xff) << 8) | ((tiny) & 0xff))
static bool getVersionLoadCommandInfo(const mach_header* mh, uint32_t* loadCommand, uint32_t* minOS, uint32_t* sdk)
{
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 0;
}
const version_min_command* versCmd;
switch ( cmd->cmd ) {
case LC_VERSION_MIN_IPHONEOS:
case LC_VERSION_MIN_MACOSX:
case LC_VERSION_MIN_TVOS:
case LC_VERSION_MIN_WATCHOS:
versCmd = (version_min_command*)cmd;
*loadCommand = versCmd->cmd;
*minOS = versCmd->version;
*sdk = versCmd->sdk;
return true;
}
cmd = nextCmd;
}
return false;
}
#if !__WATCH_OS_VERSION_MIN_REQUIRED && !__TV_OS_VERSION_MIN_REQUIRED
static uint32_t deriveSDKVersFromDylibs(const mach_header* mh)
{
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 0;
const load_command* const cmdsEnd = (load_command*)((char*)startCmds + mh->sizeofcmds);
const dylib_command* dylibCmd;
const load_command* cmd = startCmds;
const char* dylibName;
#if __IPHONE_OS_VERSION_MIN_REQUIRED
uint32_t foundationVers = 0;
#else
uint32_t libSystemVers = 0;
#endif
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 0;
}
switch ( cmd->cmd ) {
case LC_LOAD_DYLIB:
case LC_LOAD_WEAK_DYLIB:
case LC_LOAD_UPWARD_DYLIB:
dylibCmd = (dylib_command*)cmd;
if ( dylibCmd->dylib.name.offset > cmd->cmdsize )
return 0;
dylibName = (char*)dylibCmd + dylibCmd->dylib.name.offset;
#if __IPHONE_OS_VERSION_MIN_REQUIRED
if ( strcmp(dylibName, "/System/Library/Frameworks/Foundation.framework/Foundation") == 0 )
foundationVers = dylibCmd->dylib.current_version;
#else
if ( strcmp(dylibName, "/usr/lib/libSystem.B.dylib") == 0 )
libSystemVers = dylibCmd->dylib.current_version;
#endif
break;
}
cmd = nextCmd;
}
struct DylibToOSMapping {
uint32_t dylibVersion;
uint32_t osVersion;
};
#if __IPHONE_OS_VERSION_MIN_REQUIRED
static const DylibToOSMapping foundationMapping[] = {
{ PACKED_VERSION(678,24,0), 0x00020000 },
{ PACKED_VERSION(678,26,0), 0x00020100 },
{ PACKED_VERSION(678,29,0), 0x00020200 },
{ PACKED_VERSION(678,47,0), 0x00030000 },
{ PACKED_VERSION(678,51,0), 0x00030100 },
{ PACKED_VERSION(678,60,0), 0x00030200 },
{ PACKED_VERSION(751,32,0), 0x00040000 },
{ PACKED_VERSION(751,37,0), 0x00040100 },
{ PACKED_VERSION(751,49,0), 0x00040200 },
{ PACKED_VERSION(751,58,0), 0x00040300 },
{ PACKED_VERSION(881,0,0), 0x00050000 },
{ PACKED_VERSION(890,1,0), 0x00050100 },
{ PACKED_VERSION(992,0,0), 0x00060000 },
{ PACKED_VERSION(993,0,0), 0x00060100 },
{ PACKED_VERSION(1038,14,0),0x00070000 },
{ PACKED_VERSION(0,0,0), 0x00070000 }
};
if ( foundationVers != 0 ) {
uint32_t lastOsVersion = 0;
for (const DylibToOSMapping* p=foundationMapping; ; ++p) {
if ( p->dylibVersion == 0 )
return p->osVersion;
if ( foundationVers < p->dylibVersion )
return lastOsVersion;
lastOsVersion = p->osVersion;
}
}
#else
static const DylibToOSMapping libSystemMapping[] = {
{ PACKED_VERSION(88,1,3), 0x000A0400 },
{ PACKED_VERSION(111,0,0), 0x000A0500 },
{ PACKED_VERSION(123,0,0), 0x000A0600 },
{ PACKED_VERSION(159,0,0), 0x000A0700 },
{ PACKED_VERSION(169,3,0), 0x000A0800 },
{ PACKED_VERSION(1197,0,0), 0x000A0900 },
{ PACKED_VERSION(0,0,0), 0x000A0900 }
};
if ( libSystemVers != 0 ) {
uint32_t lastOsVersion = 0;
for (const DylibToOSMapping* p=libSystemMapping; ; ++p) {
if ( p->dylibVersion == 0 )
return p->osVersion;
if ( libSystemVers < p->dylibVersion )
return lastOsVersion;
lastOsVersion = p->osVersion;
}
}
#endif
return 0;
}
#endif
#if __WATCH_OS_VERSION_MIN_REQUIRED
static uint32_t watchVersToIOSVers(uint32_t vers)
{
return vers + 0x00070000;
}
uint32_t dyld_get_program_sdk_watch_os_version()
{
const mach_header* mh = (mach_header*)_NSGetMachExecuteHeader();
uint32_t loadCommand;
uint32_t minOS;
uint32_t sdk;
if ( getVersionLoadCommandInfo(mh, &loadCommand, &minOS, &sdk) ) {
if ( loadCommand == LC_VERSION_MIN_WATCHOS )
return sdk;
}
return 0;
}
uint32_t dyld_get_program_min_watch_os_version()
{
const mach_header* mh = (mach_header*)_NSGetMachExecuteHeader();
uint32_t loadCommand;
uint32_t minOS;
uint32_t sdk;
if ( getVersionLoadCommandInfo(mh, &loadCommand, &minOS, &sdk) ) {
if ( loadCommand == LC_VERSION_MIN_WATCHOS )
return minOS; }
return 0;
}
#endif
uint32_t dyld_get_sdk_version(const mach_header* mh)
{
uint32_t loadCommand;
uint32_t minOS;
uint32_t sdk;
if ( getVersionLoadCommandInfo(mh, &loadCommand, &minOS, &sdk) ) {
switch (loadCommand) {
#if __WATCH_OS_VERSION_MIN_REQUIRED
case LC_VERSION_MIN_WATCHOS:
return watchVersToIOSVers(sdk);
case LC_VERSION_MIN_IPHONEOS:
return sdk;
#elif __TV_OS_VERSION_MIN_REQUIRED
case LC_VERSION_MIN_TVOS:
case LC_VERSION_MIN_IPHONEOS:
return sdk;
#elif __IPHONE_OS_VERSION_MIN_REQUIRED
case LC_VERSION_MIN_IPHONEOS:
if ( sdk != 0 ) return sdk;
break;
#else
case LC_VERSION_MIN_MACOSX:
if ( sdk != 0 ) return sdk;
break;
#endif
}
}
#if __WATCH_OS_VERSION_MIN_REQUIRED ||__TV_OS_VERSION_MIN_REQUIRED
return 0;
#else
return deriveSDKVersFromDylibs(mh);
#endif
}
uint32_t dyld_get_program_sdk_version()
{
return dyld_get_sdk_version((mach_header*)_NSGetMachExecuteHeader());
}
uint32_t dyld_get_min_os_version(const struct mach_header* mh)
{
uint32_t loadCommand;
uint32_t minOS;
uint32_t sdk;
if ( getVersionLoadCommandInfo(mh, &loadCommand, &minOS, &sdk) ) {
switch (loadCommand) {
#if __WATCH_OS_VERSION_MIN_REQUIRED
case LC_VERSION_MIN_WATCHOS:
return watchVersToIOSVers(minOS);
case LC_VERSION_MIN_IPHONEOS:
return minOS;
#elif __TV_OS_VERSION_MIN_REQUIRED
case LC_VERSION_MIN_TVOS:
case LC_VERSION_MIN_IPHONEOS:
return minOS;
#elif __IPHONE_OS_VERSION_MIN_REQUIRED
case LC_VERSION_MIN_IPHONEOS:
return minOS;
#else
case LC_VERSION_MIN_MACOSX:
return minOS;
#endif
}
}
return 0;
}
uint32_t dyld_get_program_min_os_version()
{
return dyld_get_min_os_version((mach_header*)_NSGetMachExecuteHeader());
}
bool _dyld_get_image_uuid(const struct mach_header* mh, uuid_t 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;
}
#if DEPRECATED_APIS_SUPPORTED
NSObjectFileImageReturnCode
NSCreateObjectFileImageFromFile(
const char* pathName,
NSObjectFileImage *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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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)
{
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))
{
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))
{
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);
}
void
_dyld_bind_objc_module(const void* objc_module)
{
DYLD_LOCK_THIS_BLOCK;
static void (*p)(const void *objc_module) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_bind_objc_module", (void**)&p);
p(objc_module);
}
#endif
#if DEPRECATED_APIS_SUPPORTED
bool
_dyld_present(void)
{
return true;
}
#endif
uint32_t
_dyld_image_count(void)
{
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)
{
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)
{
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)
{
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)
{
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));
}
bool
_dyld_image_containing_address(const void* 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)
{
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);
}
#if DEPRECATED_APIS_SUPPORTED
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 <servers/bootstrap.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);
}
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()
{
int64_t val = 0;
(*swapProc)(NULL, VPROC_GSK_IS_MANAGED, NULL, &val);
return ( val != 0 );
}
#if DYLD_SHARED_CACHE_SUPPORT
static void shared_cache_missing()
{
}
static void shared_cache_out_of_date()
{
}
#endif // DYLD_SHARED_CACHE_SUPPORT
static dyld::LibSystemHelpers sHelpers = { 13, &dyldGlobalLockAcquire, &dyldGlobalLockRelease,
&getPerThreadBufferFor_dlerror, &malloc, &free, &__cxa_atexit,
#if DYLD_SHARED_CACHE_SUPPORT
&shared_cache_missing, &shared_cache_out_of_date,
#else
NULL, NULL,
#endif
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
};
extern "C" void tlv_initializer();
extern "C" void _dyld_initializer();
void _dyld_initializer()
{
void (*p)(dyld::LibSystemHelpers*);
_dyld_func_lookup("__dyld_register_thread_helpers", (void**)&p);
if(p != NULL)
p(&sHelpers);
tlv_initializer();
}
char* 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)
{
DYLD_LOCK_THIS_BLOCK;
static int (*p)(const void* , Dl_info*) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_dladdr", (void**)&p);
return(p(addr, info));
}
int dlclose(void* handle)
{
DYLD_LOCK_THIS_BLOCK;
static int (*p)(void* handle) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_dlclose", (void**)&p);
return(p(handle));
}
void* dlopen(const char* path, int mode)
{
DYLD_NO_LOCK_THIS_BLOCK;
static void* (*p)(const char* path, int) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_dlopen", (void**)&p);
void* result = p(path, mode);
__asm__ volatile("");
return result;
}
bool dlopen_preflight(const char* path)
{
DYLD_LOCK_THIS_BLOCK;
static bool (*p)(const char* path) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_dlopen_preflight", (void**)&p);
return(p(path));
}
void* dlsym(void* handle, const char* symbol)
{
DYLD_LOCK_THIS_BLOCK;
static void* (*p)(void* handle, const char* symbol) = NULL;
if(p == NULL)
_dyld_func_lookup("__dyld_dlsym", (void**)&p);
return(p(handle, symbol));
}
const struct dyld_all_image_infos* _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)
{
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)
{
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)
{
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()
{
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)
{
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)
{
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_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();
}
#if DYLD_SHARED_CACHE_SUPPORT
const char* 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();
}
#endif
void dyld_dynamic_interpose(const struct mach_header* mh, const struct dyld_interpose_tuple array[], size_t 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_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 ( 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))
{
const dyld_cache_header* cacheHeader = NULL;
bool needToUnmap = true;
const dyld_all_image_infos* allInfo = _dyld_get_all_image_infos();
if ( (allInfo != NULL) && (memcmp(allInfo->sharedCacheUUID, cacheUuid, 16) == 0) ) {
cacheHeader = (dyld_cache_header*)(SHARED_REGION_BASE + allInfo->sharedCacheSlide);
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_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 = 1;
dylibTextInfo.loadAddressUnslid = p->loadAddress;
dylibTextInfo.textSegmentSize = p->textSegmentSize;
dylibTextInfo.path = (char*)cacheHeader + p->pathOffset;
::memcpy(dylibTextInfo.dylibUuid, p->uuid, 16);
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))
{
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)
{
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)
{
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);
}