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authorHiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>2008-11-11 19:09:29 -0800
committerIngo Molnar <mingo@elte.hu>2008-11-12 12:28:01 +0100
commit4a61204856e8b28e9f5489a7875cb3a60afd1e43 (patch)
tree6593c26bd66a417df89ae4db707f21393adc43a7
parent15002fa9bf3a79ac9dcafba7ff308586936088b2 (diff)
x86: signal_32: introduce retcode and rt_retcode
Impact: cleanup Introduce retcode and rt_retcode to replace setting up frame->retcode. Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--arch/x86/kernel/signal_32.c30
1 files changed, 24 insertions, 6 deletions
diff --git a/arch/x86/kernel/signal_32.c b/arch/x86/kernel/signal_32.c
index 27a5c817432..514171ac0d0 100644
--- a/arch/x86/kernel/signal_32.c
+++ b/arch/x86/kernel/signal_32.c
@@ -45,6 +45,28 @@
# define FIX_EFLAGS __FIX_EFLAGS
#endif
+static const struct {
+ u16 poplmovl;
+ u32 val;
+ u16 int80;
+} __attribute__((packed)) retcode = {
+ 0xb858, /* popl %eax; movl $..., %eax */
+ __NR_sigreturn,
+ 0x80cd, /* int $0x80 */
+};
+
+static const struct {
+ u8 movl;
+ u32 val;
+ u16 int80;
+ u8 pad;
+} __attribute__((packed)) rt_retcode = {
+ 0xb8, /* movl $..., %eax */
+ __NR_rt_sigreturn,
+ 0x80cd, /* int $0x80 */
+ 0
+};
+
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
@@ -427,9 +449,7 @@ __setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
* reasons and because gdb uses it as a signature to notice
* signal handler stack frames.
*/
- err |= __put_user(0xb858, (short __user *)(frame->retcode+0));
- err |= __put_user(__NR_sigreturn, (int __user *)(frame->retcode+2));
- err |= __put_user(0x80cd, (short __user *)(frame->retcode+6));
+ err |= __put_user(*((u64 *)&retcode), (u64 *)frame->retcode);
if (err)
return -EFAULT;
@@ -498,9 +518,7 @@ static int __setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
* reasons and because gdb uses it as a signature to notice
* signal handler stack frames.
*/
- err |= __put_user(0xb8, (char __user *)(frame->retcode+0));
- err |= __put_user(__NR_rt_sigreturn, (int __user *)(frame->retcode+1));
- err |= __put_user(0x80cd, (short __user *)(frame->retcode+5));
+ err |= __put_user(*((u64 *)&rt_retcode), (u64 *)frame->retcode);
if (err)
return -EFAULT;