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[PATCH] IA64: kprobe invalidate icache of jump buffer

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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 <[email protected]>
Acked-by: "Luck, Tony" <[email protected]>
Acked-by: Keshavamurthy Anil S <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
bibo, mao 2006-07-30 03:03:26 -07:00 • committed by Linus Torvalds
commit a9ad965ea9
7 changed files with 15 additions and 0 deletions
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1
kernel/kprobes.c
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@ -393,6 +393,7 @@ static int __kprobes add_new_kprobe(struct kprobe *old_p, struct kprobe *p)
static inline void add_aggr_kprobe(struct kprobe *ap, struct kprobe *p)
{
copy_kprobe(p, ap);
flush_insn_slot(ap);
ap->addr = p->addr;
ap->pre_handler = aggr_pre_handler;
ap->fault_handler = aggr_fault_handler;