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authorKeshavamurthy Anil S <anil.s.keshavamurthy@intel.com>2005-09-07 00:19:35 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-08 01:58:01 +0200
commitdeac66ae454cacf942c051b86d9232af546fb187 (patch)
tree17a72e7a2dcf2d1a93a6afdef661f290b1888f1c /include/asm-ia64/kprobes.h
parent[PATCH] kprobes: fix handling of simultaneous probe hit/unregister (diff)
downloadlinux-deac66ae454cacf942c051b86d9232af546fb187.tar.xz
linux-deac66ae454cacf942c051b86d9232af546fb187.zip
[PATCH] kprobes: fix bug when probed on task and isr functions
This patch fixes a race condition where in system used to hang or sometime crash within minutes when kprobes are inserted on ISR routine and a task routine. The fix has been stress tested on i386, ia64, pp64 and on x86_64. To reproduce the problem insert kprobes on schedule() and do_IRQ() functions and you should see hang or system crash. Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Acked-by: Prasanna S Panchamukhi <prasanna@in.ibm.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-ia64/kprobes.h')
-rw-r--r--include/asm-ia64/kprobes.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/asm-ia64/kprobes.h b/include/asm-ia64/kprobes.h
index bf36a32e37e4..573a3574a24f 100644
--- a/include/asm-ia64/kprobes.h
+++ b/include/asm-ia64/kprobes.h
@@ -92,6 +92,7 @@ struct arch_specific_insn {
kprobe_opcode_t insn;
#define INST_FLAG_FIX_RELATIVE_IP_ADDR 1
#define INST_FLAG_FIX_BRANCH_REG 2
+ #define INST_FLAG_BREAK_INST 4
unsigned long inst_flag;
unsigned short target_br_reg;
};