/* * Mach-O object file loading * * Copyright (c) 2006 Pierre d'Herbemont * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <stdio.h> #include <sys/types.h> #include <fcntl.h> #include <sys/stat.h> #include <errno.h> #include <unistd.h> #include <sys/mman.h> #include <stdlib.h> #include <string.h> #include "qemu.h" #include "disas.h" #include <mach-o/loader.h> #include <mach-o/fat.h> #include <mach-o/nlist.h> #include <mach-o/reloc.h> #include <mach-o/ppc/reloc.h> //#define DEBUG_MACHLOAD #ifdef DEBUG_MACHLOAD # define DPRINTF(...) do { if(loglevel) fprintf(logfile, __VA_ARGS__); printf(__VA_ARGS__); } while(0) #else # define DPRINTF(...) do { if(loglevel) fprintf(logfile, __VA_ARGS__); } while(0) #endif # define check_mach_header(x) (x.magic == MH_CIGAM) extern const char *interp_prefix; /* we don't have a good implementation for this */ #define DONT_USE_DYLD_SHARED_MAP /* Pass extra arg to DYLD for debug */ //#define ACTIVATE_DYLD_TRACE //#define OVERRIDE_DYLINKER #ifdef OVERRIDE_DYLINKER # ifdef TARGET_I386 # define DYLINKER_NAME "/Users/steg/qemu/tests/i386-darwin-env/usr/lib/dyld" # else # define DYLINKER_NAME "/usr/lib/dyld" # endif #endif /* XXX: in an include */ struct nlist_extended { union { char *n_name; long n_strx; } n_un; unsigned char n_type; unsigned char n_sect; short st_desc; unsigned long st_value; unsigned long st_size; }; /* Print symbols in gdb */ void *macho_text_sect = 0; int macho_offset = 0; int load_object(const char *filename, struct target_pt_regs * regs, void ** mh); void qerror(const char *format, ...); #ifdef TARGET_I386 typedef struct mach_i386_thread_state { unsigned int eax; unsigned int ebx; unsigned int ecx; unsigned int edx; unsigned int edi; unsigned int esi; unsigned int ebp; unsigned int esp; unsigned int ss; unsigned int eflags; unsigned int eip; unsigned int cs; unsigned int ds; unsigned int es; unsigned int fs; unsigned int gs; } mach_i386_thread_state_t; void bswap_i386_thread_state(struct mach_i386_thread_state *ts) { bswap32s((uint32_t*)&ts->eax); bswap32s((uint32_t*)&ts->ebx); bswap32s((uint32_t*)&ts->ecx); bswap32s((uint32_t*)&ts->edx); bswap32s((uint32_t*)&ts->edi); bswap32s((uint32_t*)&ts->esi); bswap32s((uint32_t*)&ts->ebp); bswap32s((uint32_t*)&ts->esp); bswap32s((uint32_t*)&ts->ss); bswap32s((uint32_t*)&ts->eflags); bswap32s((uint32_t*)&ts->eip); bswap32s((uint32_t*)&ts->cs); bswap32s((uint32_t*)&ts->ds); bswap32s((uint32_t*)&ts->es); bswap32s((uint32_t*)&ts->fs); bswap32s((uint32_t*)&ts->gs); } #define target_thread_state mach_i386_thread_state #define TARGET_CPU_TYPE CPU_TYPE_I386 #define TARGET_CPU_NAME "i386" #endif #ifdef TARGET_PPC struct mach_ppc_thread_state { unsigned int srr0; /* Instruction address register (PC) */ unsigned int srr1; /* Machine state register (supervisor) */ unsigned int r0; unsigned int r1; unsigned int r2; unsigned int r3; unsigned int r4; unsigned int r5; unsigned int r6; unsigned int r7; unsigned int r8; unsigned int r9; unsigned int r10; unsigned int r11; unsigned int r12; unsigned int r13; unsigned int r14; unsigned int r15; unsigned int r16; unsigned int r17; unsigned int r18; unsigned int r19; unsigned int r20; unsigned int r21; unsigned int r22; unsigned int r23; unsigned int r24; unsigned int r25; unsigned int r26; unsigned int r27; unsigned int r28; unsigned int r29; unsigned int r30; unsigned int r31; unsigned int cr; /* Condition register */ unsigned int xer; /* User's integer exception register */ unsigned int lr; /* Link register */ unsigned int ctr; /* Count register */ unsigned int mq; /* MQ register (601 only) */ unsigned int vrsave; /* Vector Save Register */ }; void bswap_ppc_thread_state(struct mach_ppc_thread_state *ts) { bswap32s((uint32_t*)&ts->srr0); bswap32s((uint32_t*)&ts->srr1); bswap32s((uint32_t*)&ts->r0); bswap32s((uint32_t*)&ts->r1); bswap32s((uint32_t*)&ts->r2); bswap32s((uint32_t*)&ts->r3); bswap32s((uint32_t*)&ts->r4); bswap32s((uint32_t*)&ts->r5); bswap32s((uint32_t*)&ts->r6); bswap32s((uint32_t*)&ts->r7); bswap32s((uint32_t*)&ts->r8); bswap32s((uint32_t*)&ts->r9); bswap32s((uint32_t*)&ts->r10); bswap32s((uint32_t*)&ts->r11); bswap32s((uint32_t*)&ts->r12); bswap32s((uint32_t*)&ts->r13); bswap32s((uint32_t*)&ts->r14); bswap32s((uint32_t*)&ts->r15); bswap32s((uint32_t*)&ts->r16); bswap32s((uint32_t*)&ts->r17); bswap32s((uint32_t*)&ts->r18); bswap32s((uint32_t*)&ts->r19); bswap32s((uint32_t*)&ts->r20); bswap32s((uint32_t*)&ts->r21); bswap32s((uint32_t*)&ts->r22); bswap32s((uint32_t*)&ts->r23); bswap32s((uint32_t*)&ts->r24); bswap32s((uint32_t*)&ts->r25); bswap32s((uint32_t*)&ts->r26); bswap32s((uint32_t*)&ts->r27); bswap32s((uint32_t*)&ts->r28); bswap32s((uint32_t*)&ts->r29); bswap32s((uint32_t*)&ts->r30); bswap32s((uint32_t*)&ts->r31); bswap32s((uint32_t*)&ts->cr); bswap32s((uint32_t*)&ts->xer); bswap32s((uint32_t*)&ts->lr); bswap32s((uint32_t*)&ts->ctr); bswap32s((uint32_t*)&ts->mq); bswap32s((uint32_t*)&ts->vrsave); } #define target_thread_state mach_ppc_thread_state #define TARGET_CPU_TYPE CPU_TYPE_POWERPC #define TARGET_CPU_NAME "PowerPC" #endif struct target_thread_command { unsigned long cmd; /* LC_THREAD or LC_UNIXTHREAD */ unsigned long cmdsize; /* total size of this command */ unsigned long flavor; /* flavor of thread state */ unsigned long count; /* count of longs in thread state */ struct target_thread_state state; /* thread state for this flavor */ }; void bswap_tc(struct target_thread_command *tc) { bswap32s((uint32_t*)(&tc->flavor)); bswap32s((uint32_t*)&tc->count); #if defined(TARGET_I386) bswap_i386_thread_state(&tc->state); #elif defined(TARGET_PPC) bswap_ppc_thread_state(&tc->state); #else # error unknown TARGET_CPU_TYPE #endif } void bswap_mh(struct mach_header *mh) { bswap32s((uint32_t*)(&mh->magic)); bswap32s((uint32_t*)&mh->cputype); bswap32s((uint32_t*)&mh->cpusubtype); bswap32s((uint32_t*)&mh->filetype); bswap32s((uint32_t*)&mh->ncmds); bswap32s((uint32_t*)&mh->sizeofcmds); bswap32s((uint32_t*)&mh->flags); } void bswap_lc(struct load_command *lc) { bswap32s((uint32_t*)&lc->cmd); bswap32s((uint32_t*)&lc->cmdsize); } void bswap_fh(struct fat_header *fh) { bswap32s((uint32_t*)&fh->magic); bswap32s((uint32_t*)&fh->nfat_arch); } void bswap_fa(struct fat_arch *fa) { bswap32s((uint32_t*)&fa->cputype); bswap32s((uint32_t*)&fa->cpusubtype); bswap32s((uint32_t*)&fa->offset); bswap32s((uint32_t*)&fa->size); bswap32s((uint32_t*)&fa->align); } void bswap_segcmd(struct segment_command *sc) { bswap32s((uint32_t*)&sc->vmaddr); bswap32s((uint32_t*)&sc->vmsize); bswap32s((uint32_t*)&sc->fileoff); bswap32s((uint32_t*)&sc->filesize); bswap32s((uint32_t*)&sc->maxprot); bswap32s((uint32_t*)&sc->initprot); bswap32s((uint32_t*)&sc->nsects); bswap32s((uint32_t*)&sc->flags); } void bswap_symtabcmd(struct symtab_command *stc) { bswap32s((uint32_t*)&stc->cmd); bswap32s((uint32_t*)&stc->cmdsize); bswap32s((uint32_t*)&stc->symoff); bswap32s((uint32_t*)&stc->nsyms); bswap32s((uint32_t*)&stc->stroff); bswap32s((uint32_t*)&stc->strsize); } void bswap_sym(struct nlist *n) { bswap32s((uint32_t*)&n->n_un.n_strx); bswap16s((uint16_t*)&n->n_desc); bswap32s((uint32_t*)&n->n_value); } int load_thread(struct mach_header *mh, struct target_thread_command *tc, struct target_pt_regs * regs, int fd, int mh_pos, int need_bswap) { int entry; if(need_bswap) bswap_tc(tc); #if defined(TARGET_I386) entry = tc->state.eip; DPRINTF(" eax 0x%.8x\n ebx 0x%.8x\n ecx 0x%.8x\n edx 0x%.8x\n edi 0x%.8x\n esi 0x%.8x\n ebp 0x%.8x\n esp 0x%.8x\n ss 0x%.8x\n eflags 0x%.8x\n eip 0x%.8x\n cs 0x%.8x\n ds 0x%.8x\n es 0x%.8x\n fs 0x%.8x\n gs 0x%.8x\n", tc->state.eax, tc->state.ebx, tc->state.ecx, tc->state.edx, tc->state.edi, tc->state.esi, tc->state.ebp, tc->state.esp, tc->state.ss, tc->state.eflags, tc->state.eip, tc->state.cs, tc->state.ds, tc->state.es, tc->state.fs, tc->state.gs ); #define reg_copy(reg) regs->reg = tc->state.reg if(regs) { reg_copy(eax); reg_copy(ebx); reg_copy(ecx); reg_copy(edx); reg_copy(edi); reg_copy(esi); reg_copy(ebp); reg_copy(esp); reg_copy(eflags); reg_copy(eip); /* reg_copy(ss); reg_copy(cs); reg_copy(ds); reg_copy(es); reg_copy(fs); reg_copy(gs);*/ } #undef reg_copy #elif defined(TARGET_PPC) entry = tc->state.srr0; #endif DPRINTF("load_thread: entry 0x%x\n", entry); return entry; } int load_dylinker(struct mach_header *mh, struct dylinker_command *dc, int fd, int mh_pos, int need_bswap) { int size; char * dylinker_name; size = dc->cmdsize - sizeof(struct dylinker_command); if(need_bswap) dylinker_name = (char*)(bswap_32(dc->name.offset)+(int)dc); else dylinker_name = (char*)((dc->name.offset)+(int)dc); #ifdef OVERRIDE_DYLINKER dylinker_name = DYLINKER_NAME; #else if(asprintf(&dylinker_name, "%s%s", interp_prefix, dylinker_name) == -1) qerror("can't allocate the new dylinker name\n"); #endif DPRINTF("dylinker_name %s\n", dylinker_name); return load_object(dylinker_name, NULL, NULL); } int load_segment(struct mach_header *mh, struct segment_command *sc, int fd, int mh_pos, int need_bswap, int fixed, int slide) { unsigned long addr = sc->vmaddr; unsigned long size = sc->filesize; unsigned long error = 0; if(need_bswap) bswap_segcmd(sc); if(sc->vmaddr == 0) { DPRINTF("load_segment: sc->vmaddr == 0 returning\n"); return -1; } if (strcmp(sc->segname, "__PAGEZERO") == 0) { DPRINTF("load_segment: __PAGEZERO returning\n"); return -1; } /* Right now mmap memory */ /* XXX: should check to see that the space is free, because MAP_FIXED is dangerous */ DPRINTF("load_segment: mmaping %s to 0x%x-(0x%x|0x%x) + 0x%x\n", sc->segname, sc->vmaddr, sc->filesize, sc->vmsize, slide); if(sc->filesize > 0) { int opt = 0; if(fixed) opt |= MAP_FIXED; DPRINTF("sc->vmaddr 0x%x slide 0x%x add 0x%x\n", slide, sc->vmaddr, sc->vmaddr+slide); addr = target_mmap(sc->vmaddr+slide, sc->filesize, sc->initprot, opt, fd, mh_pos + sc->fileoff); if(addr==-1) qerror("load_segment: can't mmap at 0x%x\n", sc->vmaddr+slide); error = addr-sc->vmaddr; } else { addr = sc->vmaddr+slide; error = slide; } if(sc->vmsize > sc->filesize) { addr += sc->filesize; size = sc->vmsize-sc->filesize; addr = target_mmap(addr, size, sc->initprot, MAP_ANONYMOUS | MAP_FIXED, -1, 0); if(addr==-1) qerror("load_segment: can't mmap at 0x%x\n", sc->vmaddr+slide); } return error; } void *load_data(int fd, long offset, unsigned int size) { char *data; data = malloc(size); if (!data) return NULL; lseek(fd, offset, SEEK_SET); if (read(fd, data, size) != size) { free(data); return NULL; } return data; } /* load a mach-o object file */ int load_object(const char *filename, struct target_pt_regs * regs, void ** mh) { int need_bswap = 0; int entry_point = 0; int dyld_entry_point = 0; int slide, mmapfixed; int fd; struct load_command *lcmds, *lc; int is_fat = 0; unsigned int i, magic; int mach_hdr_pos = 0; struct mach_header mach_hdr; /* for symbol lookup whith -d flag. */ struct symtab_command * symtabcmd = 0; struct nlist_extended *symtab, *sym; struct nlist *symtab_std, *syment; char *strtab; fd = open(filename, O_RDONLY); if (fd < 0) qerror("can't open file '%s'", filename); /* Read magic header. */ if (read(fd, &magic, sizeof (magic)) != sizeof (magic)) qerror("unable to read Magic of '%s'", filename); /* Check Mach identification. */ if(magic == MH_MAGIC) { is_fat = 0; need_bswap = 0; } else if (magic == MH_CIGAM) { is_fat = 0; need_bswap = 1; } else if (magic == FAT_MAGIC) { is_fat = 1; need_bswap = 0; } else if (magic == FAT_CIGAM) { is_fat = 1; need_bswap = 1; } else qerror("Not a Mach-O file.", filename); DPRINTF("loading %s %s...\n", filename, is_fat ? "[FAT]": "[REGULAR]"); if(is_fat) { int found = 0; struct fat_header fh; struct fat_arch *fa; lseek(fd, 0, SEEK_SET); /* Read Fat header. */ if (read(fd, &fh, sizeof (fh)) != sizeof (fh)) qerror("unable to read file header"); if(need_bswap) bswap_fh(&fh); /* Read Fat Arch. */ fa = malloc(sizeof(struct fat_arch)*fh.nfat_arch); if (read(fd, fa, sizeof(struct fat_arch)*fh.nfat_arch) != sizeof(struct fat_arch)*fh.nfat_arch) qerror("unable to read file header"); for( i = 0; i < fh.nfat_arch; i++, fa++) { if(need_bswap) bswap_fa(fa); if(fa->cputype == TARGET_CPU_TYPE) { mach_hdr_pos = fa->offset; lseek(fd, mach_hdr_pos, SEEK_SET); /* Read Mach header. */ if (read(fd, &mach_hdr, sizeof(struct mach_header)) != sizeof (struct mach_header)) qerror("unable to read file header"); if(mach_hdr.magic == MH_MAGIC) need_bswap = 0; else if (mach_hdr.magic == MH_CIGAM) need_bswap = 1; else qerror("Invalid mach header in Fat Mach-O File"); found = 1; break; } } if(!found) qerror("%s: No %s CPU found in FAT Header", filename, TARGET_CPU_NAME); } else { lseek(fd, 0, SEEK_SET); /* Read Mach header */ if (read(fd, &mach_hdr, sizeof (mach_hdr)) != sizeof (mach_hdr)) qerror("%s: unable to read file header", filename); } if(need_bswap) bswap_mh(&mach_hdr); if ((mach_hdr.cputype) != TARGET_CPU_TYPE) qerror("%s: Unsupported CPU 0x%x (only 0x%x(%s) supported)", filename, mach_hdr.cputype, TARGET_CPU_TYPE, TARGET_CPU_NAME); switch(mach_hdr.filetype) { case MH_EXECUTE: break; case MH_FVMLIB: case MH_DYLIB: case MH_DYLINKER: break; default: qerror("%s: Unsupported Mach type (0x%x)", filename, mach_hdr.filetype); } /* read segment headers */ lcmds = malloc(mach_hdr.sizeofcmds); if(read(fd, lcmds, mach_hdr.sizeofcmds) != mach_hdr.sizeofcmds) qerror("%s: unable to read load_command", filename); slide = 0; mmapfixed = 0; for(i=0, lc = lcmds; i < (mach_hdr.ncmds) ; i++) { if(need_bswap) bswap_lc(lc); switch(lc->cmd) { case LC_SEGMENT: /* The main_exe can't be relocated */ if(mach_hdr.filetype == MH_EXECUTE) mmapfixed = 1; slide = load_segment(&mach_hdr, (struct segment_command*)lc, fd, mach_hdr_pos, need_bswap, mmapfixed, slide); /* other segment must be mapped according to slide exactly, if load_segment did something */ if(slide != -1) mmapfixed = 1; else slide = 0; /* load_segment didn't map the segment */ if(mach_hdr.filetype == MH_EXECUTE && slide != 0) qerror("%s: Warning executable can't be mapped at the right address (offset: 0x%x)\n", filename, slide); if(strcmp(((struct segment_command*)(lc))->segname, "__TEXT") == 0) { /* Text section */ if(mach_hdr.filetype == MH_EXECUTE) { /* return the mach_header */ *mh = (void*)(((struct segment_command*)(lc))->vmaddr + slide); } else { /* it is dyld save the section for gdb, we will be interested in dyld symbol while debuging */ macho_text_sect = (void*)(((struct segment_command*)(lc))->vmaddr + slide); macho_offset = slide; } } break; case LC_LOAD_DYLINKER: dyld_entry_point = load_dylinker( &mach_hdr, (struct dylinker_command*)lc, fd, mach_hdr_pos, need_bswap ); break; case LC_LOAD_DYLIB: /* dyld will do that for us */ break; case LC_THREAD: case LC_UNIXTHREAD: { struct target_pt_regs * _regs; if(mach_hdr.filetype == MH_DYLINKER) _regs = regs; else _regs = 0; entry_point = load_thread( &mach_hdr, (struct target_thread_command*)lc, _regs, fd, mach_hdr_pos, need_bswap ); } break; case LC_SYMTAB: /* Save the symtab and strtab */ symtabcmd = (struct symtab_command *)lc; break; case LC_ID_DYLINKER: case LC_ID_DYLIB: case LC_UUID: case LC_DYSYMTAB: case LC_TWOLEVEL_HINTS: case LC_PREBIND_CKSUM: case LC_SUB_LIBRARY: break; default: fprintf(stderr, "warning: unkown command 0x%x in '%s'\n", lc->cmd, filename); } lc = (struct load_command*)((int)(lc)+(lc->cmdsize)); } if(symtabcmd) { if(need_bswap) bswap_symtabcmd(symtabcmd); symtab_std = load_data(fd, symtabcmd->symoff+mach_hdr_pos, symtabcmd->nsyms * sizeof(struct nlist)); strtab = load_data(fd, symtabcmd->stroff+mach_hdr_pos, symtabcmd->strsize); symtab = malloc(sizeof(struct nlist_extended) * symtabcmd->nsyms); if(need_bswap) { for(i = 0, syment = symtab_std; i < symtabcmd->nsyms; i++, syment++) bswap_sym(syment); } for(i = 0, sym = symtab, syment = symtab_std; i < symtabcmd->nsyms; i++, sym++, syment++) { struct nlist *sym_follow, *sym_next = 0; unsigned int j; memset(sym, 0, sizeof(*sym)); sym->n_type = syment->n_type; if ( syment->n_type & N_STAB ) /* Debug symbols are skipped */ continue; memcpy(sym, syment, sizeof(*syment)); /* Find the following symbol in order to get the current symbol size */ for(j = 0, sym_follow = symtab_std; j < symtabcmd->nsyms; j++, sym_follow++) { if ( sym_follow->n_type & N_STAB || !(sym_follow->n_value > sym->st_value)) continue; if(!sym_next) { sym_next = sym_follow; continue; } if(!(sym_next->n_value > sym_follow->n_value)) continue; sym_next = sym_follow; } if(sym_next) sym->st_size = sym_next->n_value - sym->st_value; else sym->st_size = 10; /* XXX: text_sec_hdr->size + text_sec_hdr->offset - sym->st_value; */ sym->st_value += slide; } free((void*)symtab_std); { DPRINTF("saving symtab of %s (%d symbol(s))\n", filename, symtabcmd->nsyms); struct syminfo *s; s = malloc(sizeof(*s)); s->disas_symtab = symtab; s->disas_strtab = strtab; s->disas_num_syms = symtabcmd->nsyms; s->next = syminfos; syminfos = s; } } close(fd); if(mach_hdr.filetype == MH_EXECUTE && dyld_entry_point) return dyld_entry_point; else return entry_point+slide; } extern unsigned long stack_size; unsigned long setup_arg_pages(void * mh, char ** argv, char ** env) { unsigned long stack_base, error, size; int i; int * stack; int argc, envc; /* Create enough stack to hold everything. If we don't use * it for args, we'll use it for something else... */ size = stack_size; error = target_mmap(0, size + qemu_host_page_size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); if (error == -1) qerror("stk mmap"); /* we reserve one extra page at the top of the stack as guard */ target_mprotect(error + size, qemu_host_page_size, PROT_NONE); stack_base = error + size; stack = (void*)stack_base; /* * | STRING AREA | * +-------------+ * | 0 | * +-------------+ * | apple[n] | * +-------------+ * : * +-------------+ * | apple[0] | * +-------------+ * | 0 | * +-------------+ * | env[n] | * +-------------+ * : * : * +-------------+ * | env[0] | * +-------------+ * | 0 | * +-------------+ * | arg[argc-1] | * +-------------+ * : * : * +-------------+ * | arg[0] | * +-------------+ * | argc | * +-------------+ * sp-> | mh | address of where the a.out's file offset 0 is in memory * +-------------+ */ /* Construct the stack Stack grows down */ stack--; /* XXX: string should go up there */ *stack = 0; stack--; /* Push the absolute path of our executable */ DPRINTF("pushing apple %s (0x%x)\n", (char*)argv[0], (int)argv[0]); stl(stack, (int) argv[0]); stack--; stl(stack, 0); stack--; /* Get envc */ for(envc = 0; env[envc]; envc++); for(i = envc-1; i >= 0; i--) { DPRINTF("pushing env %s (0x%x)\n", (char*)env[i], (int)env[i]); stl(stack, (int)env[i]); stack--; /* XXX: remove that when string will be on top of the stack */ page_set_flags((int)env[i], (int)(env[i]+strlen(env[i])), PROT_READ | PAGE_VALID); } /* Add on the stack the interp_prefix choosen if so */ if(interp_prefix[0]) { char *dyld_root; asprintf(&dyld_root, "DYLD_ROOT_PATH=%s", interp_prefix); page_set_flags((int)dyld_root, (int)(dyld_root+strlen(interp_prefix)+1), PROT_READ | PAGE_VALID); stl(stack, (int)dyld_root); stack--; } #ifdef DONT_USE_DYLD_SHARED_MAP { char *shared_map_mode; asprintf(&shared_map_mode, "DYLD_SHARED_REGION=avoid"); page_set_flags((int)shared_map_mode, (int)(shared_map_mode+strlen(shared_map_mode)+1), PROT_READ | PAGE_VALID); stl(stack, (int)shared_map_mode); stack--; } #endif #ifdef ACTIVATE_DYLD_TRACE char * extra_env_static[] = {"DYLD_DEBUG_TRACE=yes", "DYLD_PREBIND_DEBUG=3", "DYLD_UNKNOW_TRACE=yes", "DYLD_PRINT_INITIALIZERS=yes", "DYLD_PRINT_SEGMENTS=yes", "DYLD_PRINT_REBASINGS=yes", "DYLD_PRINT_BINDINGS=yes", "DYLD_PRINT_INITIALIZERS=yes", "DYLD_PRINT_WARNINGS=yes" }; char ** extra_env = malloc(sizeof(extra_env_static)); bcopy(extra_env_static, extra_env, sizeof(extra_env_static)); page_set_flags((int)extra_env, (int)((void*)extra_env+sizeof(extra_env_static)), PROT_READ | PAGE_VALID); for(i = 0; i<9; i++) { DPRINTF("pushing (extra) env %s (0x%x)\n", (char*)extra_env[i], (int)extra_env[i]); stl(stack, (int) extra_env[i]); stack--; } #endif stl(stack, 0); stack--; /* Get argc */ for(argc = 0; argv[argc]; argc++); for(i = argc-1; i >= 0; i--) { DPRINTF("pushing arg %s (0x%x)\n", (char*)argv[i], (int)argv[i]); stl(stack, (int) argv[i]); stack--; /* XXX: remove that when string will be on top of the stack */ page_set_flags((int)argv[i], (int)(argv[i]+strlen(argv[i])), PROT_READ | PAGE_VALID); } DPRINTF("pushing argc %d \n", argc); stl(stack, argc); stack--; DPRINTF("pushing mh 0x%x \n", (int)mh); stl(stack, (int) mh); /* Stack points on the mh */ return (unsigned long)stack; } int mach_exec(const char * filename, char ** argv, char ** envp, struct target_pt_regs * regs) { int entrypoint, stack; void * mh; /* the Mach Header that will be used by dyld */ DPRINTF("mach_exec at 0x%x\n", (int)mach_exec); entrypoint = load_object(filename, regs, &mh); stack = setup_arg_pages(mh, argv, envp); #if defined(TARGET_I386) regs->eip = entrypoint; regs->esp = stack; #elif defined(TARGET_PPC) regs->nip = entrypoint; regs->gpr[1] = stack; #endif DPRINTF("mach_exec returns eip set to 0x%x esp 0x%x mh 0x%x\n", entrypoint, stack, (int)mh); if(!entrypoint) qerror("%s: no entry point!\n", filename); return 0; }