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| author | Keshavamurthy Anil S <anil.s.keshavamurthy@intel.com> | 2005-09-06 15:19:35 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-07 16:58:01 -0700 |
| commit | deac66ae454cacf942c051b86d9232af546fb187 (patch) | |
| tree | 17a72e7a2dcf2d1a93a6afdef661f290b1888f1c /include | |
| parent | bce0649417d6e71f6df8ab7b11103d247913b142 (diff) | |
| download | linux-3.10-deac66ae454cacf942c051b86d9232af546fb187.tar.gz linux-3.10-deac66ae454cacf942c051b86d9232af546fb187.tar.bz2 linux-3.10-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')
| -rw-r--r-- | include/asm-ia64/kprobes.h | 1 | ||||
| -rw-r--r-- | include/asm-ppc64/kprobes.h | 3 |
2 files changed, 4 insertions, 0 deletions
diff --git a/include/asm-ia64/kprobes.h b/include/asm-ia64/kprobes.h index bf36a32e37e..573a3574a24 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; }; diff --git a/include/asm-ppc64/kprobes.h b/include/asm-ppc64/kprobes.h index 0802919c323..d9129d2b038 100644 --- a/include/asm-ppc64/kprobes.h +++ b/include/asm-ppc64/kprobes.h @@ -42,6 +42,9 @@ typedef unsigned int kprobe_opcode_t; #define JPROBE_ENTRY(pentry) (kprobe_opcode_t *)((func_descr_t *)pentry) +#define is_trap(instr) (IS_TW(instr) || IS_TD(instr) || \ + IS_TWI(instr) || IS_TDI(instr)) + #define ARCH_SUPPORTS_KRETPROBES void kretprobe_trampoline(void); |