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authorbibo, mao <bibo.mao@intel.com>2006-07-30 06:03:26 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-07-31 16:28:38 -0400
commita9ad965ea9a6d719daf333847a2ceb0e363994bd (patch)
tree9ecb71f533c16eb790909f13fefd67fd939ffb2b /kernel/kprobes.c
parent25c8716cb08dea386c7d6220b82eba732ccbf976 (diff)
[PATCH] IA64: kprobe invalidate icache of jump buffer
Kprobe inserts breakpoint instruction in probepoint and then jumps to instruction slot when breakpoint is hit, the instruction slot icache must be consistent with dcache. Here is the patch which invalidates instruction slot icache area. Without this patch, in some machines there will be fault when executing instruction slot where icache content is inconsistent with dcache. Signed-off-by: bibo,mao <bibo.mao@intel.com> Acked-by: "Luck, Tony" <tony.luck@intel.com> Acked-by: Keshavamurthy Anil S <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'kernel/kprobes.c')
-rw-r--r--kernel/kprobes.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 64aab081153b..3f57dfdc8f92 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -393,6 +393,7 @@ static int __kprobes add_new_kprobe(struct kprobe *old_p, struct kprobe *p)
393static inline void add_aggr_kprobe(struct kprobe *ap, struct kprobe *p) 393static inline void add_aggr_kprobe(struct kprobe *ap, struct kprobe *p)
394{ 394{
395 copy_kprobe(p, ap); 395 copy_kprobe(p, ap);
396 flush_insn_slot(ap);
396 ap->addr = p->addr; 397 ap->addr = p->addr;
397 ap->pre_handler = aggr_pre_handler; 398 ap->pre_handler = aggr_pre_handler;
398 ap->fault_handler = aggr_fault_handler; 399 ap->fault_handler = aggr_fault_handler;