GDB segfaults on Pandaboard?

[jpf]

As said in the title I can't get GDB to work on the pandaboard (A3). Even calling gdb without arguments or only with --help causes a segfault. I use a up to date archlinuxARM system and tried the gdb from the repositories, recompiled the gdb package myself and compiled a gdb 7.2 package, all segfault.

Is this a known issue and is there anything that can be done about that?

[pepedog]

Mine seems ok (trimslice)
# gdb
GNU gdb (GDB) 7.3.1
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "armv7l-unknown-linux-gnueabi".
For bug reporting instructions, please see:
<http://www.gnu.org/software/gdb/bugs/>.

[jpf]

OK, using some printf debugging, I found the issue and it's not Pandaboard specific at all:
in arm-linux-nat.c there's a get_linux_version function. This function naively assumes that a linux kernel version number always has three parts, but 3.0-ARCH only has two! So the third part is null and strtoul crashes. Kinda stupid bug, I wonder why nobody else hit that till now. Will search the GDB bugtracker now if it's already been filed.

Patch:
$this->bbcode_second_pass_code('', 'diff -ur gdb-7.3.1/gdb/arm-linux-nat.c gdb-7.3.1.patched/gdb/arm-linux-nat.c
--- gdb-7.3.1/gdb/arm-linux-nat.c 2011-02-21 09:03:37.000000000 -0600
+++ gdb-7.3.1.patched/gdb/arm-linux-nat.c 2011-09-22 09:50:22.000000000 -0500
@@ -674,9 +674,15 @@
pminor = strtok (NULL, ".");
prelease = strtok (NULL, ".");

- *vmajor = (unsigned int) strtoul (pmajor, &tail, 0);
- *vminor = (unsigned int) strtoul (pminor, &tail, 0);
- *vrelease = (unsigned int) strtoul (prelease, &tail, 0);
+ *vmajor = 0;
+ *vminor = 0;
+ *vrelease = 0;
+ if(pmajor)
+ *vmajor = (unsigned int) strtoul (pmajor, &tail, 0);
+ if(pminor)
+ *vminor = (unsigned int) strtoul (pminor, &tail, 0);
+ if(prelease)
+ *vrelease = (unsigned int) strtoul (prelease, &tail, 0);

return ((*vmajor << 16) | (*vminor << 8) | *vrelease);
}
')

BUG: http://sourceware.org/bugzilla/show_bug.cgi?id=13218