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Re: Display libc function names instead of address ?
> Date: Thu, 16 Jun 2005 14:29:36 -0400
> From: Daniel Jacobowitz <drow@false.org>
> Cc: victor.stinner@haypocalc.com, gdb@sources.redhat.com
>
> Here's an example of the effect of the patch I just posted to
> gdb-patches. With an unpatched GDB, load gdb on a Linux system and run
> "disas captured_main":
>
> 0x0807c0ac <captured_main+76>: mov %eax,0x4(%esp)
> 0x0807c0b0 <captured_main+80>: movl $0x5,(%esp)
> 0x0807c0b7 <captured_main+87>: call 0x807b3a0 <_init+952>
> 0x0807c0bc <captured_main+92>: movl $0x0,(%esp)
> 0x0807c0c3 <captured_main+99>: mov $0x8239443,%eax
> 0x0807c0c8 <captured_main+104>: mov %eax,0x4(%esp)
> 0x0807c0cc <captured_main+108>: call 0x807b3a0 <_init+952>
>
> With the patch applied:
>
> 0x0807c0ac <captured_main+76>: mov %eax,0x4(%esp)
> 0x0807c0b0 <captured_main+80>: movl $0x5,(%esp)
> 0x0807c0b7 <captured_main+87>: call 0x807b3a0 <setlocale@plt>
> 0x0807c0bc <captured_main+92>: movl $0x0,(%esp)
> 0x0807c0c3 <captured_main+99>: mov $0x8239443,%eax
> 0x0807c0c8 <captured_main+104>: mov %eax,0x4(%esp)
> 0x0807c0cc <captured_main+108>: call 0x807b3a0 <setlocale@plt>
I don't understand: what is this "setlocale@plt" thingy?
Anyway, I tried this with GDB 6.1 on a Debian box and saw this:
0x0807a8ab <captured_main+75>: mov %eax,0xffffff10(%ebp)
0x0807a8b1 <captured_main+81>: add $0xfffffff8,%esp
0x0807a8b4 <captured_main+84>: push $0x81ca040
0x0807a8b9 <captured_main+89>: push $0x5
0x0807a8bb <captured_main+91>: call 0x8079bec <setlocale>
0x0807a8c0 <captured_main+96>: add $0xfffffff8,%esp
0x0807a8c3 <captured_main+99>: push $0x81ca040
0x0807a8c8 <captured_main+104>: push $0x0
0x0807a8ca <captured_main+106>: call 0x8079bec <setlocale>
0x0807a8cf <captured_main+111>: add $0x20,%esp
0x0807a8d2 <captured_main+114>: add $0xfffffff8,%esp
0x0807a8d5 <captured_main+117>: push $0x81ca041
which seems to show the names of library functions just fine.
I then tried this with GDB 6.3 and a MinGW build of Emacs on a
Windows XP box and saw things like this:
0x0100216d <main+341>: movl $0x1,0xffffffd4(%ebp)
0x01002174 <main+348>: movl $0x128a50f,0x4(%esp)
0x0100217c <main+356>: movl $0x0,(%esp)
0x01002183 <main+363>: call 0x114f7e0 <setlocale>
...
0x010021e1 <main+457>: movl $0x0,(%esp)
0x010021e8 <main+464>: call 0x114f7c0 <_isatty>
...
0x010021f5 <main+477>: mov 0xffffffe4(%ebp),%eax
0x010021f8 <main+480>: movl $0x128a646,0x4(%esp)
0x01002200 <main+488>: mov %eax,0x8(%esp)
0x01002204 <main+492>: mov 0x12fab38,%eax
0x01002209 <main+497>: add $0x40,%eax
0x0100220c <main+500>: mov %eax,(%esp)
0x0100220f <main+503>: call 0x114f830 <fprintf>
which again shows library functions with their full name.
So I'm unsure what is the problem. Am I missing something?