Andrew Morton wrote:
 >ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.9-rc4/2.6.9-rc4-mm1/
[...]
 > kgdb-ga.patch
 >   kgdb stub for ia32 (George Anzinger's one)
 >   kgdbL warning fix
 >   kgdb buffer overflow fix
 >   kgdbL warning fix
 >   kgdb: CONFIG_DEBUG_INFO fix
 >   x86_64 fixes
 >   correct kgdb.txt Documentation link (against  2.6.1-rc1-mm2)
 >   kgdb: fix for recent gcc
 >   kgdb warning fixes
 >   THREAD_SIZE fixes for kgdb
 >   Fix stack overflow test for non-8k stacks
 >   kgdb-ga.patch fix for i386 single-step into sysenter
 >   fix TRAP_BAD_SYSCALL_EXITS on i386
 >   add TRAP_BAD_SYSCALL_EXITS config for i386

Hi Andrew,

When compiling on my P3 with CONFIG_KGDB, I get this error :

   CC      arch/i386/kernel/traps.o
arch/i386/kernel/traps.c: Dans la fonction « do_debug »:
arch/i386/kernel/traps.c:776: error: `sysenter_past_esp' undeclared 
(first use in this function)
arch/i386/kernel/traps.c:776: error: (Each undeclared identifier is 
reported only once
arch/i386/kernel/traps.c:776: error: for each function it appears in.)
make[1]: *** [arch/i386/kernel/traps.o] Erreur 1
make: *** [arch/i386/kernel] Erreur 2

sysenter_past_esp is declared (as extern). But it seems that 
kgdb-ga.patch moved it inside of the the print_context_stack
function so that it's not visible outside anymore.

Moving "extern void sysenter_past_esp()" outside of print_context_stack
seems to fix compiling. Hope this won't break anything else.
Patch attached.

Regards
Brice Goglin