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--- dyld/dyld-551.4/src/dyldInitialization.cpp
+++ /dev/null
@@ -1,282 +0,0 @@
-/* -*- mode: C++; c-basic-offset: 4; tab-width: 4 -*-
- *
- * Copyright (c) 2004-2008 Apple Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- *
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- *
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- *
- * @APPLE_LICENSE_HEADER_END@
- */
-
-#define __STDC_LIMIT_MACROS
-#include <stdint.h>
-#include <stddef.h>
-#include <string.h>
-#include <stdlib.h>
-#include <Availability.h>
-#include <mach/mach.h>
-#include <mach-o/loader.h>
-#include <mach-o/ldsyms.h>
-#include <mach-o/reloc.h>
-#if __x86_64__
- #include <mach-o/x86_64/reloc.h>
-#endif
-#include "dyld.h"
-#include "dyldSyscallInterface.h"
-
-// from dyld_gdb.cpp
-extern void addImagesToAllImages(uint32_t infoCount, const dyld_image_info info[]);
-extern void syncProcessInfo();
-
-#ifndef MH_PIE
- #define MH_PIE 0x200000
-#endif
-
-// currently dyld has no initializers, but if some come back, set this to non-zero
-#define DYLD_INITIALIZER_SUPPORT 0
-
-#if __LP64__
- #define LC_SEGMENT_COMMAND LC_SEGMENT_64
- #define macho_segment_command segment_command_64
- #define macho_section section_64
- #define RELOC_SIZE 3
-#else
- #define LC_SEGMENT_COMMAND LC_SEGMENT
- #define macho_segment_command segment_command
- #define macho_section section
- #define RELOC_SIZE 2
-#endif
-
-#if __x86_64__
- #define POINTER_RELOC X86_64_RELOC_UNSIGNED
-#else
- #define POINTER_RELOC GENERIC_RELOC_VANILLA
-#endif
-
-
-#if TARGET_IPHONE_SIMULATOR
-const dyld::SyscallHelpers* gSyscallHelpers = NULL;
-#endif
-
-
-//
-// Code to bootstrap dyld into a runnable state
-//
-//
-
-namespace dyldbootstrap {
-
-
-
-#if DYLD_INITIALIZER_SUPPORT
-
-typedef void (*Initializer)(int argc, const char* argv[], const char* envp[], const char* apple[]);
-
-extern const Initializer inits_start __asm("section$start$__DATA$__mod_init_func");
-extern const Initializer inits_end __asm("section$end$__DATA$__mod_init_func");
-
-//
-// For a regular executable, the crt code calls dyld to run the executables initializers.
-// For a static executable, crt directly runs the initializers.
-// dyld (should be static) but is a dynamic executable and needs this hack to run its own initializers.
-// We pass argc, argv, etc in case libc.a uses those arguments
-//
-static void runDyldInitializers(const struct macho_header* mh, intptr_t slide, int argc, const char* argv[], const char* envp[], const char* apple[])
-{
- for (const Initializer* p = &inits_start; p < &inits_end; ++p) {
- (*p)(argc, argv, envp, apple);
- }
-}
-#endif // DYLD_INITIALIZER_SUPPORT
-
-
-//
-// The kernel may have slid a Position Independent Executable
-//
-static uintptr_t slideOfMainExecutable(const struct macho_header* mh)
-{
- const uint32_t cmd_count = mh->ncmds;
- const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
- const struct load_command* cmd = cmds;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- if ( cmd->cmd == LC_SEGMENT_COMMAND ) {
- const struct macho_segment_command* segCmd = (struct macho_segment_command*)cmd;
- if ( (segCmd->fileoff == 0) && (segCmd->filesize != 0)) {
- return (uintptr_t)mh - segCmd->vmaddr;
- }
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- }
- return 0;
-}
-
-
-//
-// If the kernel does not load dyld at its preferred address, we need to apply
-// fixups to various initialized parts of the __DATA segment
-//
-static void rebaseDyld(const struct macho_header* mh, intptr_t slide)
-{
- // rebase non-lazy pointers (which all point internal to dyld, since dyld uses no shared libraries)
- // and get interesting pointers into dyld
- const uint32_t cmd_count = mh->ncmds;
- const struct load_command* const cmds = (struct load_command*)(((char*)mh)+sizeof(macho_header));
- const struct load_command* cmd = cmds;
- const struct macho_segment_command* linkEditSeg = NULL;
-#if __x86_64__
- const struct macho_segment_command* firstWritableSeg = NULL;
-#endif
- const struct dysymtab_command* dynamicSymbolTable = NULL;
- for (uint32_t i = 0; i < cmd_count; ++i) {
- switch (cmd->cmd) {
- case LC_SEGMENT_COMMAND:
- {
- const struct macho_segment_command* seg = (struct macho_segment_command*)cmd;
- if ( strcmp(seg->segname, "__LINKEDIT") == 0 )
- linkEditSeg = seg;
- const struct macho_section* const sectionsStart = (struct macho_section*)((char*)seg + sizeof(struct macho_segment_command));
- const struct macho_section* const sectionsEnd = §ionsStart[seg->nsects];
- for (const struct macho_section* sect=sectionsStart; sect < sectionsEnd; ++sect) {
- const uint8_t type = sect->flags & SECTION_TYPE;
- if ( type == S_NON_LAZY_SYMBOL_POINTERS ) {
- // rebase non-lazy pointers (which all point internal to dyld, since dyld uses no shared libraries)
- const uint32_t pointerCount = (uint32_t)(sect->size / sizeof(uintptr_t));
- uintptr_t* const symbolPointers = (uintptr_t*)(sect->addr + slide);
- for (uint32_t j=0; j < pointerCount; ++j) {
- symbolPointers[j] += slide;
- }
- }
- }
-#if __x86_64__
- if ( (firstWritableSeg == NULL) && (seg->initprot & VM_PROT_WRITE) )
- firstWritableSeg = seg;
-#endif
- }
- break;
- case LC_DYSYMTAB:
- dynamicSymbolTable = (struct dysymtab_command *)cmd;
- break;
- }
- cmd = (const struct load_command*)(((char*)cmd)+cmd->cmdsize);
- }
-
- // use reloc's to rebase all random data pointers
-#if __x86_64__
- const uintptr_t relocBase = firstWritableSeg->vmaddr + slide;
-#else
- const uintptr_t relocBase = (uintptr_t)mh;
-#endif
- const relocation_info* const relocsStart = (struct relocation_info*)(linkEditSeg->vmaddr + slide + dynamicSymbolTable->locreloff - linkEditSeg->fileoff);
- const relocation_info* const relocsEnd = &relocsStart[dynamicSymbolTable->nlocrel];
- for (const relocation_info* reloc=relocsStart; reloc < relocsEnd; ++reloc) {
- if ( reloc->r_length != RELOC_SIZE )
- throw "relocation in dyld has wrong size";
-
- if ( reloc->r_type != POINTER_RELOC )
- throw "relocation in dyld has wrong type";
-
- // update pointer by amount dyld slid
- *((uintptr_t*)(reloc->r_address + relocBase)) += slide;
- }
-}
-
-
-extern "C" void mach_init();
-extern "C" void __guard_setup(const char* apple[]);
-
-
-//
-// This is code to bootstrap dyld. This work in normally done for a program by dyld and crt.
-// In dyld we have to do this manually.
-//
-uintptr_t start(const struct macho_header* appsMachHeader, int argc, const char* argv[],
- intptr_t slide, const struct macho_header* dyldsMachHeader,
- uintptr_t* startGlue)
-{
- // if kernel had to slide dyld, we need to fix up load sensitive locations
- // we have to do this before using any global variables
- if ( slide != 0 ) {
- rebaseDyld(dyldsMachHeader, slide);
- }
-
- // allow dyld to use mach messaging
- mach_init();
-
- // kernel sets up env pointer to be just past end of agv array
- const char** envp = &argv[argc+1];
-
- // kernel sets up apple pointer to be just past end of envp array
- const char** apple = envp;
- while(*apple != NULL) { ++apple; }
- ++apple;
-
- // set up random value for stack canary
- __guard_setup(apple);
-
-#if DYLD_INITIALIZER_SUPPORT
- // run all C++ initializers inside dyld
- runDyldInitializers(dyldsMachHeader, slide, argc, argv, envp, apple);
-#endif
-
- // now that we are done bootstrapping dyld, call dyld's main
- uintptr_t appsSlide = slideOfMainExecutable(appsMachHeader);
- return dyld::_main(appsMachHeader, appsSlide, argc, argv, envp, apple, startGlue);
-}
-
-
-#if TARGET_IPHONE_SIMULATOR
-
-extern "C" uintptr_t start_sim(int argc, const char* argv[], const char* envp[], const char* apple[],
- const macho_header* mainExecutableMH, const macho_header* dyldMH, uintptr_t dyldSlide,
- const dyld::SyscallHelpers*, uintptr_t* startGlue);
-
-
-uintptr_t start_sim(int argc, const char* argv[], const char* envp[], const char* apple[],
- const macho_header* mainExecutableMH, const macho_header* dyldMH, uintptr_t dyldSlide,
- const dyld::SyscallHelpers* sc, uintptr_t* startGlue)
-{
- // if simulator dyld loaded slid, it needs to rebase itself
- // we have to do this before using any global variables
- if ( dyldSlide != 0 ) {
- rebaseDyld(dyldMH, dyldSlide);
- }
-
- // save table of syscall pointers
- gSyscallHelpers = sc;
-
- // allow dyld to use mach messaging
- mach_init();
-
- // set up random value for stack canary
- __guard_setup(apple);
-
- // setup gProcessInfo to point to host dyld's struct
- dyld::gProcessInfo = (struct dyld_all_image_infos*)(sc->getProcessInfo());
- syncProcessInfo();
-
- // now that we are done bootstrapping dyld, call dyld's main
- uintptr_t appsSlide = slideOfMainExecutable(mainExecutableMH);
- return dyld::_main(mainExecutableMH, appsSlide, argc, argv, envp, apple, startGlue);
-}
-#endif
-
-
-} // end of namespace
-
-
-
-