| /* |
| * 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, see <http://www.gnu.org/licenses/>. |
| */ |
| #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 { qemu_log(__VA_ARGS__); printf(__VA_ARGS__); } while(0) |
| #else |
| # define DPRINTF(...) do { qemu_log(__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; |
| } |
