/* General "disassemble this chunk" code. Used for debugging. */ #include "config.h" #include "dis-asm.h" #include "elf.h" #include <errno.h> #include "cpu.h" #include "exec-all.h" #include "disas.h" /* Filled in by elfload.c. Simplistic, but will do for now. */ struct syminfo *syminfos = NULL; /* Get LENGTH bytes from info's buffer, at target address memaddr. Transfer them to myaddr. */ int buffer_read_memory (memaddr, myaddr, length, info) bfd_vma memaddr; bfd_byte *myaddr; int length; struct disassemble_info *info; { if (memaddr < info->buffer_vma || memaddr + length > info->buffer_vma + info->buffer_length) /* Out of bounds. Use EIO because GDB uses it. */ return EIO; memcpy (myaddr, info->buffer + (memaddr - info->buffer_vma), length); return 0; } /* Get LENGTH bytes from info's buffer, at target address memaddr. Transfer them to myaddr. */ static int target_read_memory (bfd_vma memaddr, bfd_byte *myaddr, int length, struct disassemble_info *info) { int i; for(i = 0; i < length; i++) { myaddr[i] = ldub_code(memaddr + i); } return 0; } /* Print an error message. We can assume that this is in response to an error return from buffer_read_memory. */ void perror_memory (status, memaddr, info) int status; bfd_vma memaddr; struct disassemble_info *info; { if (status != EIO) /* Can't happen. */ (*info->fprintf_func) (info->stream, "Unknown error %d\n", status); else /* Actually, address between memaddr and memaddr + len was out of bounds. */ (*info->fprintf_func) (info->stream, "Address 0x%" PRIx64 " is out of bounds.\n", memaddr); } /* This could be in a separate file, to save miniscule amounts of space in statically linked executables. */ /* Just print the address is hex. This is included for completeness even though both GDB and objdump provide their own (to print symbolic addresses). */ void generic_print_address (addr, info) bfd_vma addr; struct disassemble_info *info; { (*info->fprintf_func) (info->stream, "0x%" PRIx64, addr); } /* Just return the given address. */ int generic_symbol_at_address (addr, info) bfd_vma addr; struct disassemble_info * info; { return 1; } bfd_vma bfd_getl32 (const bfd_byte *addr) { unsigned long v; v = (unsigned long) addr[0]; v |= (unsigned long) addr[1] << 8; v |= (unsigned long) addr[2] << 16; v |= (unsigned long) addr[3] << 24; return (bfd_vma) v; } bfd_vma bfd_getb32 (const bfd_byte *addr) { unsigned long v; v = (unsigned long) addr[0] << 24; v |= (unsigned long) addr[1] << 16; v |= (unsigned long) addr[2] << 8; v |= (unsigned long) addr[3]; return (bfd_vma) v; } bfd_vma bfd_getl16 (const bfd_byte *addr) { unsigned long v; v = (unsigned long) addr[0]; v |= (unsigned long) addr[1] << 8; return (bfd_vma) v; } bfd_vma bfd_getb16 (const bfd_byte *addr) { unsigned long v; v = (unsigned long) addr[0] << 24; v |= (unsigned long) addr[1] << 16; return (bfd_vma) v; } #ifdef TARGET_ARM static int print_insn_thumb1(bfd_vma pc, disassemble_info *info) { return print_insn_arm(pc | 1, info); } #endif /* Disassemble this for me please... (debugging). 'flags' has teh following values: i386 - nonzero means 16 bit code arm - nonzero means thumb code ppc - nonzero means little endian other targets - unused */ void target_disas(FILE *out, target_ulong code, target_ulong size, int flags) { target_ulong pc; int count; struct disassemble_info disasm_info; int (*print_insn)(bfd_vma pc, disassemble_info *info); INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf); disasm_info.read_memory_func = target_read_memory; disasm_info.buffer_vma = code; disasm_info.buffer_length = size; #ifdef TARGET_WORDS_BIGENDIAN disasm_info.endian = BFD_ENDIAN_BIG; #else disasm_info.endian = BFD_ENDIAN_LITTLE; #endif #if defined(TARGET_I386) if (flags == 2) disasm_info.mach = bfd_mach_x86_64; else if (flags == 1) disasm_info.mach = bfd_mach_i386_i8086; else disasm_info.mach = bfd_mach_i386_i386; print_insn = print_insn_i386; #elif defined(TARGET_ARM) if (flags) print_insn = print_insn_thumb1; else print_insn = print_insn_arm; #elif defined(TARGET_SPARC) print_insn = print_insn_sparc; #ifdef TARGET_SPARC64 disasm_info.mach = bfd_mach_sparc_v9b; #endif #elif defined(TARGET_PPC) if (flags) disasm_info.endian = BFD_ENDIAN_LITTLE; #ifdef TARGET_PPC64 disasm_info.mach = bfd_mach_ppc64; #else disasm_info.mach = bfd_mach_ppc; #endif print_insn = print_insn_ppc; #elif defined(TARGET_M68K) print_insn = print_insn_m68k; #elif defined(TARGET_MIPS) #ifdef TARGET_WORDS_BIGENDIAN print_insn = print_insn_big_mips; #else print_insn = print_insn_little_mips; #endif #elif defined(TARGET_M68K) print_insn = print_insn_m68k; #elif defined(TARGET_SH4) disasm_info.mach = bfd_mach_sh4; print_insn = print_insn_sh; #else fprintf(out, "0x" TARGET_FMT_lx ": Asm output not supported on this arch\n", code); return; #endif for (pc = code; pc < code + size; pc += count) { fprintf(out, "0x" TARGET_FMT_lx ": ", pc); count = print_insn(pc, &disasm_info); #if 0 { int i; uint8_t b; fprintf(out, " {"); for(i = 0; i < count; i++) { target_read_memory(pc + i, &b, 1, &disasm_info); fprintf(out, " %02x", b); } fprintf(out, " }"); } #endif fprintf(out, "\n"); if (count < 0) break; } } /* Disassemble this for me please... (debugging). */ void disas(FILE *out, void *code, unsigned long size) { unsigned long pc; int count; struct disassemble_info disasm_info; int (*print_insn)(bfd_vma pc, disassemble_info *info); INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf); disasm_info.buffer = code; disasm_info.buffer_vma = (unsigned long)code; disasm_info.buffer_length = size; #ifdef WORDS_BIGENDIAN disasm_info.endian = BFD_ENDIAN_BIG; #else disasm_info.endian = BFD_ENDIAN_LITTLE; #endif #if defined(__i386__) disasm_info.mach = bfd_mach_i386_i386; print_insn = print_insn_i386; #elif defined(__x86_64__) disasm_info.mach = bfd_mach_x86_64; print_insn = print_insn_i386; #elif defined(__powerpc__) print_insn = print_insn_ppc; #elif defined(__alpha__) print_insn = print_insn_alpha; #elif defined(__sparc__) print_insn = print_insn_sparc; #elif defined(__arm__) print_insn = print_insn_arm; #elif defined(__MIPSEB__) print_insn = print_insn_big_mips; #elif defined(__MIPSEL__) print_insn = print_insn_little_mips; #elif defined(__m68k__) print_insn = print_insn_m68k; #else fprintf(out, "0x%lx: Asm output not supported on this arch\n", (long) code); return; #endif for (pc = (unsigned long)code; pc < (unsigned long)code + size; pc += count) { fprintf(out, "0x%08lx: ", pc); #ifdef __arm__ /* since data is included in the code, it is better to display code data too */ fprintf(out, "%08x ", (int)bfd_getl32((const bfd_byte *)pc)); #endif count = print_insn(pc, &disasm_info); fprintf(out, "\n"); if (count < 0) break; } } /* Look up symbol for debugging purpose. Returns "" if unknown. */ const char *lookup_symbol(target_ulong orig_addr) { unsigned int i; /* Hack, because we know this is x86. */ Elf32_Sym *sym; struct syminfo *s; target_ulong addr; for (s = syminfos; s; s = s->next) { sym = s->disas_symtab; for (i = 0; i < s->disas_num_syms; i++) { if (sym[i].st_shndx == SHN_UNDEF || sym[i].st_shndx >= SHN_LORESERVE) continue; if (ELF_ST_TYPE(sym[i].st_info) != STT_FUNC) continue; addr = sym[i].st_value; #ifdef TARGET_ARM /* The bottom address bit marks a Thumb symbol. */ addr &= ~(target_ulong)1; #endif if (orig_addr >= addr && orig_addr < addr + sym[i].st_size) return s->disas_strtab + sym[i].st_name; } } return ""; } #if !defined(CONFIG_USER_ONLY) void term_vprintf(const char *fmt, va_list ap); void term_printf(const char *fmt, ...); static int monitor_disas_is_physical; static CPUState *monitor_disas_env; static int monitor_read_memory (memaddr, myaddr, length, info) bfd_vma memaddr; bfd_byte *myaddr; int length; struct disassemble_info *info; { if (monitor_disas_is_physical) { cpu_physical_memory_rw(memaddr, myaddr, length, 0); } else { cpu_memory_rw_debug(monitor_disas_env, memaddr,myaddr, length, 0); } return 0; } static int monitor_fprintf(FILE *stream, const char *fmt, ...) { va_list ap; va_start(ap, fmt); term_vprintf(fmt, ap); va_end(ap); return 0; } void monitor_disas(CPUState *env, target_ulong pc, int nb_insn, int is_physical, int flags) { int count, i; struct disassemble_info disasm_info; int (*print_insn)(bfd_vma pc, disassemble_info *info); INIT_DISASSEMBLE_INFO(disasm_info, NULL, monitor_fprintf); monitor_disas_env = env; monitor_disas_is_physical = is_physical; disasm_info.read_memory_func = monitor_read_memory; disasm_info.buffer_vma = pc; #ifdef TARGET_WORDS_BIGENDIAN disasm_info.endian = BFD_ENDIAN_BIG; #else disasm_info.endian = BFD_ENDIAN_LITTLE; #endif #if defined(TARGET_I386) if (flags == 2) disasm_info.mach = bfd_mach_x86_64; else if (flags == 1) disasm_info.mach = bfd_mach_i386_i8086; else disasm_info.mach = bfd_mach_i386_i386; print_insn = print_insn_i386; #elif defined(TARGET_ARM) print_insn = print_insn_arm; #elif defined(TARGET_SPARC) print_insn = print_insn_sparc; #elif defined(TARGET_PPC) #ifdef TARGET_PPC64 disasm_info.mach = bfd_mach_ppc64; #else disasm_info.mach = bfd_mach_ppc; #endif print_insn = print_insn_ppc; #elif defined(TARGET_M68K) print_insn = print_insn_m68k; #elif defined(TARGET_MIPS) #ifdef TARGET_WORDS_BIGENDIAN print_insn = print_insn_big_mips; #else print_insn = print_insn_little_mips; #endif #elif defined(TARGET_M68K) print_insn = print_insn_m68k; #else term_printf("0x" TARGET_FMT_lx ": Asm output not supported on this arch\n", pc); return; #endif for(i = 0; i < nb_insn; i++) { term_printf("0x" TARGET_FMT_lx ": ", pc); count = print_insn(pc, &disasm_info); term_printf("\n"); if (count < 0) break; pc += count; } } #endif