diff options
| author | Jan Beulich <jbeulich@novell.com> | 2006-01-11 22:43:00 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-01-11 19:01:13 -0800 |
| commit | b556b35e98ad2b9174a7a623d152cdf412d1a999 (patch) | |
| tree | 10f99d70e719fba811dee85d2f3a82b26d7a4ce8 /arch/x86_64/kernel/asm-offsets.c | |
| parent | ed8388a5d9db0445322f86ee8381b0f04a2057ee (diff) | |
[PATCH] x86_64: Move int 3 handler to debug stack and allow to increase it.
This
- switches the INT3 handler to run on an IST stack (to cope with
breakpoints set by a kernel debugger on places where the kernel's
%gs base hasn't been set up, yet); the IST stack used is shared with
the INT1 handler's
[AK: this also allows setting a kprobe on the interrupt/exception entry
points]
- allows nesting of INT1/INT3 handlers so that one can, with a kernel
debugger, debug (at least) the user-mode portions of the INT1/INT3
handling; the nesting isn't actively enabled here since a kernel-
debugger-free kernel doesn't need it
Signed-Off-By: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/kernel/asm-offsets.c')
| -rw-r--r-- | arch/x86_64/kernel/asm-offsets.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/asm-offsets.c b/arch/x86_64/kernel/asm-offsets.c index aaa6d383351..00a08d13230 100644 --- a/arch/x86_64/kernel/asm-offsets.c +++ b/arch/x86_64/kernel/asm-offsets.c @@ -64,5 +64,9 @@ int main(void) DEFINE(pbe_address, offsetof(struct pbe, address)); DEFINE(pbe_orig_address, offsetof(struct pbe, orig_address)); DEFINE(pbe_next, offsetof(struct pbe, next)); + BLANK(); +#if DEBUG_STKSZ > EXCEPTION_STKSZ + DEFINE(DEBUG_IST, DEBUG_STACK); +#endif return 0; } |