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elf-parser/disasm.c at master · TDMaker/elf-parser · GitHub
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elf-parser
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disasm.c
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#include
<elf-parser.h>
void
disassemble
(
int32_t
fd
,
Elf32_Ehdr
eh
,
Elf32_Shdr
*
sh_table
)
{
int32_t
i
;
char
*
sh_str
;
/* section-header string-table is also a section. */
char
*
buf
;
/* buffer to hold contents of the .text section */
/* Read section-header string-table */
debug
(
"eh.e_shstrndx = 0x%x\n"
,
eh
.
e_shstrndx
);
sh_str
=
read_section
(
fd
,
sh_table
[
eh
.
e_shstrndx
]);
for
(
i
=
0
;
i
<
eh
.
e_shnum
;
i
++
) {
if
(!
strcmp
(
".text"
, (
sh_str
+
sh_table
[
i
].
sh_name
))) {
printf
(
"Found section\t\".text\"\n"
);
printf
(
"at offset\t0x%08x\n"
,
sh_table
[
i
].
sh_offset
);
printf
(
"of size\t\t0x%08x\n"
,
sh_table
[
i
].
sh_size
);
break
;
}
}
assert
(
lseek
(
fd
,
sh_table
[
i
].
sh_offset
,
SEEK_SET
)
==
sh_table
[
i
].
sh_offset
);
buf
=
malloc
(
sh_table
[
i
].
sh_size
);
if
(!
buf
) {
printf
(
"Failed to allocate %dbytes!!\n"
,
sh_table
[
i
].
sh_size
);
printf
(
"Failed to disassemble!!\n"
);
return
;
}
assert
(
read
(
fd
,
buf
,
sh_table
[
i
].
sh_size
)
==
sh_table
[
i
].
sh_size
);
/* Now buf contains the instructions (4bytes each) */
}
void
disassemble64
(
int32_t
fd
,
Elf64_Ehdr
eh
,
Elf64_Shdr
*
sh_table
)
{
int32_t
i
;
char
*
sh_str
;
/* section-header string-table is also a section. */
char
*
buf
;
/* buffer to hold contents of the .text section */
/* Read section-header string-table */
debug
(
"eh.e_shstrndx = 0x%x\n"
,
eh
.
e_shstrndx
);
sh_str
=
read_section64
(
fd
,
sh_table
[
eh
.
e_shstrndx
]);
for
(
i
=
0
;
i
<
eh
.
e_shnum
;
i
++
) {
if
(!
strcmp
(
".text"
, (
sh_str
+
sh_table
[
i
].
sh_name
))) {
printf
(
"Found section\t\".text\"\n"
);
printf
(
"at offset\t0x%08lx\n"
,
sh_table
[
i
].
sh_offset
);
printf
(
"of size\t\t0x%08lx\n"
,
sh_table
[
i
].
sh_size
);
break
;
}
}
assert
(
lseek
(
fd
,
sh_table
[
i
].
sh_offset
,
SEEK_SET
)
==
sh_table
[
i
].
sh_offset
);
buf
=
malloc
(
sh_table
[
i
].
sh_size
);
if
(!
buf
) {
printf
(
"Failed to allocate %ldbytes!!\n"
,
sh_table
[
i
].
sh_size
);
printf
(
"Failed to disassemble!!\n"
);
return
;
}
assert
(
read
(
fd
,
buf
,
sh_table
[
i
].
sh_size
)
==
sh_table
[
i
].
sh_size
);
/* Now buf contains the instructions (4bytes each) */
}
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