//
// 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);
}
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);
}
void init(void) {
memcpy(__data_begin__, __rodata_end__, __data_end__ - __data_begin__);
memset(__bss_begin__, 0, __bss_end__ - __bss_begin__);
mach_init();
set_trap_handler();
tlb_init();
pcb_init();
main();
}
