objdump/nm
1,objdump -h jprobe_example.o
jprobe_example.o: file format elf32-i386
Sections:
Idx Name Size VMA LMA File off Algn
0 .text 0000002a 00000000 00000000 00000040 2**4
CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
1 .data 00000044 00000000 00000000 00000080 2**5
CONTENTS, ALLOC, LOAD, RELOC, DATA
2 .bss 00000000 00000000 00000000 000000c4 2**2
ALLOC
3 .rodata.str1.1 00000026 00000000 00000000 000000c4 2**0
CONTENTS, ALLOC, LOAD, READONLY, DATA
4 .exit.text 00000027 00000000 00000000 000000ea 2**0
CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
5 .rodata.str1.4 00000096 00000000 00000000 00000114 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
6 .init.text 0000004b 00000000 00000000 000001aa 2**0
CONTENTS, ALLOC, LOAD, RELOC, READONLY, CODE
7 .modinfo 0000000c 00000000 00000000 000001f5 2**0
CONTENTS, ALLOC, LOAD, READONLY, DATA
8 .comment 00000024 00000000 00000000 00000201 2**0
CONTENTS, READONLY
9 .note.GNU-stack 00000000 00000000 00000000 00000225 2**0
2, objdump -t jprobe_example.o
jprobe_example.o: file format elf32-i386
SYMBOL TABLE:
00000000 l df *ABS* 00000000 jprobe_example.c
00000000 l d .text 00000000 .text
00000000 l d .data 00000000 .data
00000000 l d .bss 00000000 .bss
00000000 l d .rodata.str1.1 00000000 .rodata.str1.1
00000000 l d .exit.text 00000000 .exit.text
00000000 l F .exit.text 00000027 jprobe_exit
00000000 l O .data 00000044 my_jprobe
00000000 l d .rodata.str1.4 00000000 .rodata.str1.4
00000000 l F .text 0000002a jdo_fork
00000000 l d .init.text 00000000 .init.text
00000000 l F .init.text 0000004b jprobe_init
00000000 l d .modinfo 00000000 .modinfo
00000000 l O .modinfo 0000000c __mod_license68
00000000 l d .note.GNU-stack 00000000 .note.GNU-stack
00000000 l d .comment 00000000 .comment
00000000 *UND* 00000000 unregister_jprobe
00000000 *UND* 00000000 printk
00000000 *UND* 00000000 jprobe_return
00000000 *UND* 00000000 register_jprobe
00000000 g F .init.text 0000004b init_module
00000000 g F .exit.text 00000027 cleanup_module
3,objdump -d jprobe_example.o
jprobe_example.o: file format elf32-i386
Disassembly of section .text:
00000000
0: 55 push %ebp
1: 89 e5 mov %esp,%ebp
3: 83 ec 10 sub $0x10,%esp
6: 8b 55 08 mov 0x8(%ebp),%edx
9: 89 4c 24 0c mov %ecx,0xc(%esp)
d: 89 44 24 04 mov %eax,0x4(%esp)
11: c7 04 24 00 00 00 00 movl $0x0,(%esp)
18: 89 54 24 08 mov %edx,0x8(%esp)
1c: e8 fc ff ff ff call 1d
21: e8 fc ff ff ff call 22
26: 31 c0 xor %eax,%eax
28: c9 leave
29: c3 ret
Disassembly of section .exit.text:
...
objdump [-a|--archive-headers]
[-b bfdname|--target=bfdname]
[-C|--demangle[=style] ]
[-d|--disassemble]
[-D|--disassemble-all]
[-z|--disassemble-zeroes]
[-EB|-EL|--endian={big | little }]
[-f|--file-headers]
[-F|--file-offsets]
[--file-start-context]
[-g|--debugging]
[-e|--debugging-tags]
[-h|--section-headers|--headers]
[-i|--info]
[-j section|--section=section]
[-l|--line-numbers]
[-S|--source]
[-m machine|--architecture=machine]
[-M options|--disassembler-options=options]
[-p|--private-headers]
[-r|--reloc]
[-R|--dynamic-reloc]
[-s|--full-contents]
[-W[lLiaprmfFsoR]|
--dwarf[=rawline,=decodedline,=info,=abbrev,=pubnames,=aranges,=macro,=frames,=frames-interp,=str,=loc,=Ranges]]
[-G|--stabs]
[-t|--syms]
[-T|--dynamic-syms]
[-x|--all-headers]
[-w|--wide]
[--start-address=address]
[--stop-address=address]
[--prefix-addresses]
[--[no-]show-raw-insn]
[--adjust-vma=offset]
[--special-syms]
[--prefix=prefix]
[--prefix-strip=level]
[--insn-width=width]
[-V|--version]
[-H|--help]
objfile...
4, nm jprobe_example.o
00000000 r __mod_license68
00000000 T cleanup_module
00000000 T init_module
00000000 t jdo_fork
00000000 t jprobe_exit
00000000 t jprobe_init
U jprobe_return
00000000 d my_jprobe
U printk
U register_jprobe
U unregister_jprobe
nm [-a|--debug-syms]
[-g|--extern-only][--plugin name]
[-B] [-C|--demangle[=style]] [-D|--dynamic]
[-S|--print-size] [-s|--print-armap]
[-A|-o|--print-file-name][--special-syms]
[-n|-v|--numeric-sort] [-p|--no-sort]
[-r|--reverse-sort] [--size-sort] [-u|--undefined-only]
[-t radix|--radix=radix] [-P|--portability]
[--target=bfdname] [-fformat|--format=format]
[--defined-only] [-l|--line-numbers] [--no-demangle]
[-V|--version] [-X 32_64] [--help] [objfile...]