diff options
| author | Alexander Nyberg <alexn@telia.com> | 2005-06-25 14:58:27 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-25 16:24:55 -0700 |
| commit | 4f339ecb30c759f94a29992d4635d9194132b6cf (patch) | |
| tree | 9a1438b35d87a1d3a3359c273a39ac4895578e1c /arch | |
| parent | 6e274d144302068a00794ec22e73520c0615cb6f (diff) | |
| download | kernel-crypto-4f339ecb30c759f94a29992d4635d9194132b6cf.tar.gz kernel-crypto-4f339ecb30c759f94a29992d4635d9194132b6cf.tar.xz kernel-crypto-4f339ecb30c759f94a29992d4635d9194132b6cf.zip | |
[PATCH] kdump: Save trap information for later analysis
If we are faulting in kernel it is quite possible this will lead to a
panic. Save trap number, cr2 (in case of page fault) and error_code in the
current thread (these fields already exist for signal delivery but are not
used here).
This helps later kdump crash analyzing from user-space (a script has been
submitted to dig this info out in gdb).
Signed-off-by: Alexander Nyberg <alexn@telia.com>
Cc: <fastboot@lists.osdl.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/i386/kernel/traps.c | 12 | ||||
| -rw-r--r-- | arch/i386/mm/fault.c | 3 |
2 files changed, 11 insertions, 4 deletions
diff --git a/arch/i386/kernel/traps.c b/arch/i386/kernel/traps.c index e458463ebc0..c6077a5ef7c 100644 --- a/arch/i386/kernel/traps.c +++ b/arch/i386/kernel/traps.c @@ -369,6 +369,10 @@ static inline void die_if_kernel(const char * str, struct pt_regs * regs, long e static void do_trap(int trapnr, int signr, char *str, int vm86, struct pt_regs * regs, long error_code, siginfo_t *info) { + struct task_struct *tsk = current; + tsk->thread.error_code = error_code; + tsk->thread.trap_no = trapnr; + if (regs->eflags & VM_MASK) { if (vm86) goto vm86_trap; @@ -379,9 +383,6 @@ static void do_trap(int trapnr, int signr, char *str, int vm86, goto kernel_trap; trap_signal: { - struct task_struct *tsk = current; - tsk->thread.error_code = error_code; - tsk->thread.trap_no = trapnr; if (info) force_sig_info(signr, info, tsk); else @@ -494,6 +495,9 @@ fastcall void do_general_protection(struct pt_regs * regs, long error_code) } put_cpu(); + current->thread.error_code = error_code; + current->thread.trap_no = 13; + if (regs->eflags & VM_MASK) goto gp_in_vm86; @@ -897,9 +901,9 @@ fastcall void do_simd_coprocessor_error(struct pt_regs * regs, error_code); return; } - die_if_kernel("cache flush denied", regs, error_code); current->thread.trap_no = 19; current->thread.error_code = error_code; + die_if_kernel("cache flush denied", regs, error_code); force_sig(SIGSEGV, current); } } diff --git a/arch/i386/mm/fault.c b/arch/i386/mm/fault.c index a509237c481..92ed6c0a55d 100644 --- a/arch/i386/mm/fault.c +++ b/arch/i386/mm/fault.c @@ -463,6 +463,9 @@ no_context: printk(KERN_ALERT "*pte = %08lx\n", page); } #endif + tsk->thread.cr2 = address; + tsk->thread.trap_no = 14; + tsk->thread.error_code = error_code; die("Oops", regs, error_code); bust_spinlocks(0); do_exit(SIGKILL); |