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[PATCH] kprobe cleanup for VM_MASK judgement 

When trap happens in user space, kprobe_exceptions_notify() funtion will
skip it.  This patch deletes some unnecessary code for VM_MASK judgement in
eflags.

Signed-off-by: bibo, mao <bibo.mao@intel.com>
Cc: Masami Hiramatsu <hiramatu@sdl.hitachi.co.jp>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Acked-by: "Keshavamurthy, Anil S" <anil.s.keshavamurthy@intel.com>
Acked-by: Prasanna S Panchamukhi <prasanna@in.ibm.com>
Cc: Jim Keniston <jkenisto@us.ibm.com>
Cc: Yumiko Sugita <sugita@sdl.hitachi.co.jp>
Cc: Satoshi Oshima <soshima@redhat.com>
Cc: Hideo Aoki <haoki@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
mao, bibo 2006-04-27 18:39:44 -07:00 committed by Linus Torvalds
parent 9539d4e79f
commit bf661987da
1 changed files with 0 additions and 9 deletions
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9
arch/i386/kernel/kprobes.c
View File

@ -242,10 +242,6 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
kcb->kprobe_status = KPROBE_REENTER; kcb->kprobe_status = KPROBE_REENTER;
return 1; return 1;
} else { } else {
if (regs->eflags & VM_MASK) {
/* We are in virtual-8086 mode. Return 0 */
goto no_kprobe;
}
if (*addr != BREAKPOINT_INSTRUCTION) { if (*addr != BREAKPOINT_INSTRUCTION) {
/* The breakpoint instruction was removed by /* The breakpoint instruction was removed by
* another cpu right after we hit, no further * another cpu right after we hit, no further
@ -265,11 +261,6 @@ static int __kprobes kprobe_handler(struct pt_regs *regs)
p = get_kprobe(addr); p = get_kprobe(addr);
if (!p) { if (!p) {
if (regs->eflags & VM_MASK) {
/* We are in virtual-8086 mode. Return 0 */
goto no_kprobe;
}
if (*addr != BREAKPOINT_INSTRUCTION) { if (*addr != BREAKPOINT_INSTRUCTION) {
/* /*
* The breakpoint instruction was removed right * The breakpoint instruction was removed right