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[PATCH] kprobes: prevent possible race conditions i386 changes

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This patch contains the i386 architecture specific changes to prevent the
possible race conditions.

Signed-off-by: Prasanna S Panchamukhi <prasanna@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Prasanna S Panchamukhi
2005-09-06 15:19:27 -07:00
committed by Linus Torvalds
parent d0aaff9796
commit 3d97ae5b95
5 changed files with 34 additions and 25 deletions
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12
arch/i386/kernel/traps.c
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@@ -363,8 +363,9 @@ static inline void die_if_kernel(const char * str, struct pt_regs * regs, long e
die(str, regs, err);
}
static void do_trap(int trapnr, int signr, char *str, int vm86,
struct pt_regs * regs, long error_code, siginfo_t *info)
static void __kprobes do_trap(int trapnr, int signr, char *str, int vm86,
struct pt_regs * regs, long error_code,
siginfo_t *info)
{
struct task_struct *tsk = current;
tsk->thread.error_code = error_code;
@@ -460,7 +461,8 @@ DO_ERROR(12, SIGBUS, "stack segment", stack_segment)
DO_ERROR_INFO(17, SIGBUS, "alignment check", alignment_check, BUS_ADRALN, 0)
DO_ERROR_INFO(32, SIGSEGV, "iret exception", iret_error, ILL_BADSTK, 0)
fastcall void do_general_protection(struct pt_regs * regs, long error_code)
fastcall void __kprobes do_general_protection(struct pt_regs * regs,
long error_code)
{
int cpu = get_cpu();
struct tss_struct *tss = &per_cpu(init_tss, cpu);
@@ -676,7 +678,7 @@ void unset_nmi_callback(void)
EXPORT_SYMBOL_GPL(unset_nmi_callback);
#ifdef CONFIG_KPROBES
fastcall void do_int3(struct pt_regs *regs, long error_code)
fastcall void __kprobes do_int3(struct pt_regs *regs, long error_code)
{
if (notify_die(DIE_INT3, "int3", regs, error_code, 3, SIGTRAP)
== NOTIFY_STOP)
@@ -710,7 +712,7 @@ fastcall void do_int3(struct pt_regs *regs, long error_code)
* find every occurrence of the TF bit that could be saved away even
* by user code)
*/
fastcall void do_debug(struct pt_regs * regs, long error_code)
fastcall void __kprobes do_debug(struct pt_regs * regs, long error_code)
{
unsigned int condition;
struct task_struct *tsk = current;