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Re: Display libc function names instead of address ?
- From: Daniel Jacobowitz <drow at false dot org>
- To: Eli Zaretskii <eliz at gnu dot org>
- Cc: victor dot stinner at haypocalc dot com, gdb at sources dot redhat dot com
- Date: Thu, 16 Jun 2005 14:29:36 -0400
- Subject: Re: Display libc function names instead of address ?
- References: <1118892960.12713.5.camel@haypopc> <u4qby2jmi.fsf@gnu.org>
On Thu, Jun 16, 2005 at 09:21:09PM +0200, Eli Zaretskii wrote:
> > Date: Thu, 16 Jun 2005 05:36:00 +0200
> > From: Victor STINNER <victor.stinner@haypocalc.com>
> >
> > I woud like to know if it is possible to display libc functions name
> > instead of their address. Example :
> >
> > (1) (...) // prepare parameters
> > call 0x8048728
> >
> > (2) jmp *0x804a6b0 // in relocation table, at 0x08048728
>
> In response of what command(s) would you like to see the function
> names? Can you post an example of a command and its current output?
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>
This doesn't work absolutely everywhere, of course. It requires
target-specific support inside BFD.
--
Daniel Jacobowitz
CodeSourcery, LLC