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authorDavid S. Miller <davem@davemloft.net>2010-02-09 16:18:40 -0800
committerDavid S. Miller <davem@davemloft.net>2010-02-09 16:18:40 -0800
commitf036d9f3985a529a81e582f68aa984eb7b20d54d (patch)
treeeaf58cc5d2c81e3ca08e23b5cda76eacd515d166 /arch/sparc/kernel/signal32.c
parent6abce7711fcbd72b42f0c9632c1beccf4e674663 (diff)
downloadlinux-f036d9f3985a529a81e582f68aa984eb7b20d54d.tar.bz2
sparc: Align clone and signal stacks to 16 bytes.
This is mandatory for 64-bit processes, and doing it also for 32-bit processes saves a conditional in the compat case. This fixes the glibc/nptl/tst-stdio1 test case, as well as many others, on 64-bit. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/signal32.c')
-rw-r--r--arch/sparc/kernel/signal32.c10
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/sparc/kernel/signal32.c b/arch/sparc/kernel/signal32.c
index ba5b09ad6666..ea22cd373c64 100644
--- a/arch/sparc/kernel/signal32.c
+++ b/arch/sparc/kernel/signal32.c
@@ -120,8 +120,8 @@ struct rt_signal_frame32 {
};
/* Align macros */
-#define SF_ALIGNEDSZ (((sizeof(struct signal_frame32) + 7) & (~7)))
-#define RT_ALIGNEDSZ (((sizeof(struct rt_signal_frame32) + 7) & (~7)))
+#define SF_ALIGNEDSZ (((sizeof(struct signal_frame32) + 15) & (~15)))
+#define RT_ALIGNEDSZ (((sizeof(struct rt_signal_frame32) + 15) & (~15)))
int copy_siginfo_to_user32(compat_siginfo_t __user *to, siginfo_t *from)
{
@@ -420,15 +420,17 @@ static void __user *get_sigframe(struct sigaction *sa, struct pt_regs *regs, uns
sp = current->sas_ss_sp + current->sas_ss_size;
}
+ sp -= framesize;
+
/* Always align the stack frame. This handles two cases. First,
* sigaltstack need not be mindful of platform specific stack
* alignment. Second, if we took this signal because the stack
* is not aligned properly, we'd like to take the signal cleanly
* and report that.
*/
- sp &= ~7UL;
+ sp &= ~15UL;
- return (void __user *)(sp - framesize);
+ return (void __user *) sp;
}
static int save_fpu_state32(struct pt_regs *regs, __siginfo_fpu_t __user *fpu)