1 /* General "disassemble this chunk" code. Used for debugging. */
7 /* Filled in by elfload.c. Simplistic, but will do for now. */
8 unsigned int disas_num_syms
;
10 const char *disas_strtab
;
12 /* Get LENGTH bytes from info's buffer, at target address memaddr.
13 Transfer them to myaddr. */
15 buffer_read_memory (memaddr
, myaddr
, length
, info
)
19 struct disassemble_info
*info
;
21 if (memaddr
< info
->buffer_vma
22 || memaddr
+ length
> info
->buffer_vma
+ info
->buffer_length
)
23 /* Out of bounds. Use EIO because GDB uses it. */
25 memcpy (myaddr
, info
->buffer
+ (memaddr
- info
->buffer_vma
), length
);
29 /* Print an error message. We can assume that this is in response to
30 an error return from buffer_read_memory. */
32 perror_memory (status
, memaddr
, info
)
35 struct disassemble_info
*info
;
39 (*info
->fprintf_func
) (info
->stream
, "Unknown error %d\n", status
);
41 /* Actually, address between memaddr and memaddr + len was
43 (*info
->fprintf_func
) (info
->stream
,
44 "Address 0x%x is out of bounds.\n", memaddr
);
47 /* This could be in a separate file, to save miniscule amounts of space
48 in statically linked executables. */
50 /* Just print the address is hex. This is included for completeness even
51 though both GDB and objdump provide their own (to print symbolic
55 generic_print_address (addr
, info
)
57 struct disassemble_info
*info
;
59 (*info
->fprintf_func
) (info
->stream
, "0x%x", addr
);
62 /* Just return the given address. */
65 generic_symbol_at_address (addr
, info
)
67 struct disassemble_info
* info
;
72 bfd_vma
bfd_getl32 (const bfd_byte
*addr
)
76 v
= (unsigned long) addr
[0];
77 v
|= (unsigned long) addr
[1] << 8;
78 v
|= (unsigned long) addr
[2] << 16;
79 v
|= (unsigned long) addr
[3] << 24;
83 bfd_vma
bfd_getb32 (const bfd_byte
*addr
)
87 v
= (unsigned long) addr
[0] << 24;
88 v
|= (unsigned long) addr
[1] << 16;
89 v
|= (unsigned long) addr
[2] << 8;
90 v
|= (unsigned long) addr
[3];
94 /* Disassemble this for me please... (debugging). */
95 void disas(FILE *out
, void *code
, unsigned long size
, enum disas_type type
)
99 struct disassemble_info disasm_info
;
100 int (*print_insn
)(bfd_vma pc
, disassemble_info
*info
);
102 INIT_DISASSEMBLE_INFO(disasm_info
, out
, fprintf
);
104 disasm_info
.buffer
= code
;
105 disasm_info
.buffer_vma
= (unsigned long)code
;
106 disasm_info
.buffer_length
= size
;
108 if (type
== DISAS_TARGET
) {
109 #ifdef WORDS_BIGENDIAN
110 disasm_info
.endian
= BFD_ENDIAN_BIG
;
112 disasm_info
.endian
= BFD_ENDIAN_LITTLE
;
115 disasm_info
.mach
= bfd_mach_i386_i386
;
116 print_insn
= print_insn_i386
;
117 #elif defined(__powerpc__)
118 print_insn
= print_insn_ppc
;
119 #elif defined(__alpha__)
120 print_insn
= print_insn_alpha
;
121 #elif defined(__sparc__)
122 print_insn
= print_insn_sparc
;
123 #elif defined(__arm__)
124 print_insn
= print_insn_arm
;
126 fprintf(out
, "Asm output not supported on this arch\n");
130 /* Currently only source supported in x86. */
131 disasm_info
.endian
= BFD_ENDIAN_LITTLE
;
132 if (type
== DISAS_I386_I386
)
133 disasm_info
.mach
= bfd_mach_i386_i386
;
135 disasm_info
.mach
= bfd_mach_i386_i8086
;
136 print_insn
= print_insn_i386
;
139 for (pc
= code
; pc
< (uint8_t *)code
+ size
; pc
+= count
) {
140 fprintf(out
, "0x%08lx: ", (long)pc
);
142 /* since data are included in the code, it is better to
143 display code data too */
144 if (type
== DISAS_TARGET
) {
145 fprintf(out
, "%08x ", (int)bfd_getl32((const bfd_byte
*)pc
));
148 count
= print_insn((unsigned long)pc
, &disasm_info
);
155 /* Look up symbol for debugging purpose. Returns "" if unknown. */
156 const char *lookup_symbol(void *orig_addr
)
159 /* Hack, because we know this is x86. */
160 Elf32_Sym
*sym
= disas_symtab
;
162 for (i
= 0; i
< disas_num_syms
; i
++) {
163 if (sym
[i
].st_shndx
== SHN_UNDEF
164 || sym
[i
].st_shndx
>= SHN_LORESERVE
)
167 if (ELF_ST_TYPE(sym
[i
].st_info
) != STT_FUNC
)
170 if ((long)orig_addr
>= sym
[i
].st_value
171 && (long)orig_addr
< sym
[i
].st_value
+ sym
[i
].st_size
)
172 return disas_strtab
+ sym
[i
].st_name
;