1 /* General "disassemble this chunk" code. Used for debugging. */
8 /* Filled in by elfload.c. Simplistic, but will do for now. */
9 unsigned int disas_num_syms;
11 const char *disas_strtab;
13 /* Get LENGTH bytes from info's buffer, at target address memaddr.
14 Transfer them to myaddr. */
16 buffer_read_memory (memaddr, myaddr, length, info)
20 struct disassemble_info *info;
22 if (memaddr < info->buffer_vma
23 || memaddr + length > info->buffer_vma + info->buffer_length)
24 /* Out of bounds. Use EIO because GDB uses it. */
26 memcpy (myaddr, info->buffer + (memaddr - info->buffer_vma), length);
30 /* Print an error message. We can assume that this is in response to
31 an error return from buffer_read_memory. */
33 perror_memory (status, memaddr, info)
36 struct disassemble_info *info;
40 (*info->fprintf_func) (info->stream, "Unknown error %d\n", status);
42 /* Actually, address between memaddr and memaddr + len was
44 (*info->fprintf_func) (info->stream,
45 "Address 0x%llx is out of bounds.\n", memaddr);
48 /* This could be in a separate file, to save miniscule amounts of space
49 in statically linked executables. */
51 /* Just print the address is hex. This is included for completeness even
52 though both GDB and objdump provide their own (to print symbolic
56 generic_print_address (addr, info)
58 struct disassemble_info *info;
60 (*info->fprintf_func) (info->stream, "0x%llx", addr);
63 /* Just return the given address. */
66 generic_symbol_at_address (addr, info)
68 struct disassemble_info * info;
73 bfd_vma bfd_getl32 (const bfd_byte *addr)
77 v = (unsigned long) addr[0];
78 v |= (unsigned long) addr[1] << 8;
79 v |= (unsigned long) addr[2] << 16;
80 v |= (unsigned long) addr[3] << 24;
84 bfd_vma bfd_getb32 (const bfd_byte *addr)
88 v = (unsigned long) addr[0] << 24;
89 v |= (unsigned long) addr[1] << 16;
90 v |= (unsigned long) addr[2] << 8;
91 v |= (unsigned long) addr[3];
95 /* Disassemble this for me please... (debugging). 'flags' is only used
96 for i386: non zero means 16 bit code */
97 void disas(FILE *out, void *code, unsigned long size, int is_host, int flags)
101 struct disassemble_info disasm_info;
102 int (*print_insn)(bfd_vma pc, disassemble_info *info);
104 INIT_DISASSEMBLE_INFO(disasm_info, out, fprintf);
106 disasm_info.buffer = code;
107 disasm_info.buffer_vma = (unsigned long)code;
108 disasm_info.buffer_length = size;
111 #ifdef WORDS_BIGENDIAN
112 disasm_info.endian = BFD_ENDIAN_BIG;
114 disasm_info.endian = BFD_ENDIAN_LITTLE;
117 disasm_info.mach = bfd_mach_i386_i386;
118 print_insn = print_insn_i386;
119 #elif defined(__powerpc__)
120 print_insn = print_insn_ppc;
121 #elif defined(__alpha__)
122 print_insn = print_insn_alpha;
123 #elif defined(__sparc__)
124 print_insn = print_insn_sparc;
125 #elif defined(__arm__)
126 print_insn = print_insn_arm;
128 fprintf(out, "Asm output not supported on this arch\n");
132 #ifdef TARGET_WORDS_BIGENDIAN
133 disasm_info.endian = BFD_ENDIAN_BIG;
135 disasm_info.endian = BFD_ENDIAN_LITTLE;
137 #if defined(TARGET_I386)
139 disasm_info.mach = bfd_mach_i386_i386;
141 disasm_info.mach = bfd_mach_i386_i8086;
142 print_insn = print_insn_i386;
143 #elif defined(TARGET_ARM)
144 print_insn = print_insn_arm;
146 fprintf(out, "Asm output not supported on this arch\n");
151 for (pc = code; pc < (uint8_t *)code + size; pc += count) {
152 fprintf(out, "0x%08lx: ", (long)pc);
154 /* since data are included in the code, it is better to
155 display code data too */
157 fprintf(out, "%08x ", (int)bfd_getl32((const bfd_byte *)pc));
160 count = print_insn((unsigned long)pc, &disasm_info);
167 /* Look up symbol for debugging purpose. Returns "" if unknown. */
168 const char *lookup_symbol(void *orig_addr)
171 /* Hack, because we know this is x86. */
172 Elf32_Sym *sym = disas_symtab;
174 for (i = 0; i < disas_num_syms; i++) {
175 if (sym[i].st_shndx == SHN_UNDEF
176 || sym[i].st_shndx >= SHN_LORESERVE)
179 if (ELF_ST_TYPE(sym[i].st_info) != STT_FUNC)
182 if ((long)orig_addr >= sym[i].st_value
183 && (long)orig_addr < sym[i].st_value + sym[i].st_size)
184 return disas_strtab + sym[i].st_name;