diff options
| author | Keith Owens <kaos@ocs.com.au> | 2006-08-30 13:37:19 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-08-30 19:05:16 -0400 |
| commit | 01ebb77b31149d847726a8847ad0d37631d7f049 (patch) | |
| tree | a91d01f8c17d24041a4f2015e093ddfbd9defa1e /arch/x86_64/kernel/init_task.c | |
| parent | 386dcafaacd212ef4a8aeed67a7db3ffbb44c7b2 (diff) | |
[PATCH] x86_64: Save original IST values for checking stack addresses
The values in init_tss.ist[] can change when an IST event occurs. Save
the original IST values for checking stack addresses when debugging or
doing stack traces.
Signed-off-by: Keith Owens <kaos@ocs.com.au>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/kernel/init_task.c')
| -rw-r--r-- | arch/x86_64/kernel/init_task.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/init_task.c b/arch/x86_64/kernel/init_task.c index ce31d904d601..3dc5854ba21e 100644 --- a/arch/x86_64/kernel/init_task.c +++ b/arch/x86_64/kernel/init_task.c | |||
| @@ -46,4 +46,9 @@ EXPORT_SYMBOL(init_task); | |||
| 46 | */ | 46 | */ |
| 47 | DEFINE_PER_CPU(struct tss_struct, init_tss) ____cacheline_internodealigned_in_smp = INIT_TSS; | 47 | DEFINE_PER_CPU(struct tss_struct, init_tss) ____cacheline_internodealigned_in_smp = INIT_TSS; |
| 48 | 48 | ||
| 49 | /* Copies of the original ist values from the tss are only accessed during | ||
| 50 | * debugging, no special alignment required. | ||
| 51 | */ | ||
| 52 | DEFINE_PER_CPU(struct orig_ist, orig_ist); | ||
| 53 | |||
| 49 | #define ALIGN_TO_4K __attribute__((section(".data.init_task"))) | 54 | #define ALIGN_TO_4K __attribute__((section(".data.init_task"))) |