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authorPaul Mundt <lethal@linux-sh.org>2008-09-12 22:08:20 +0900
committerPaul Mundt <lethal@linux-sh.org>2008-09-12 22:08:20 +0900
commitf8b890ab4ca60c05b5621b267712709d329f7612 (patch)
treeef79531765dd63e12b9506299b45abb24938de21 /arch/sh/kernel
parentcb700aa4f13d38726defab3060d3ebeaf67dc189 (diff)
sh: Flag T-bit for syscall restart.
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel')
-rw-r--r--arch/sh/kernel/signal_32.c53
1 files changed, 31 insertions, 22 deletions
diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c
index 345de2f1d53..be194d0bd7d 100644
--- a/arch/sh/kernel/signal_32.c
+++ b/arch/sh/kernel/signal_32.c
@@ -490,37 +490,43 @@ give_sigsegv:
return -EFAULT;
}
+static inline void
+handle_syscall_restart(unsigned long save_r0, struct pt_regs *regs,
+ struct sigaction *sa)
+{
+ /* If we're not from a syscall, bail out */
+ if (regs->tra < 0)
+ return;
+
+ /* check for system call restart.. */
+ switch (regs->regs[0]) {
+ case -ERESTART_RESTARTBLOCK:
+ case -ERESTARTNOHAND:
+ no_system_call_restart:
+ regs->regs[0] = -EINTR;
+ regs->sr |= 1;
+ break;
+
+ case -ERESTARTSYS:
+ if (!(sa->sa_flags & SA_RESTART))
+ goto no_system_call_restart;
+ /* fallthrough */
+ case -ERESTARTNOINTR:
+ regs->regs[0] = save_r0;
+ regs->pc -= instruction_size(ctrl_inw(regs->pc - 4));
+ break;
+ }
+}
+
/*
* OK, we're invoking a handler
*/
-
static int
handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *oldset, struct pt_regs *regs, unsigned int save_r0)
{
int ret;
- /* Are we from a system call? */
- if (regs->tra >= 0) {
- /* If so, check system call restarting.. */
- switch (regs->regs[0]) {
- case -ERESTART_RESTARTBLOCK:
- case -ERESTARTNOHAND:
- no_system_call_restart:
- regs->regs[0] = -EINTR;
- break;
-
- case -ERESTARTSYS:
- if (!(ka->sa.sa_flags & SA_RESTART))
- goto no_system_call_restart;
- /* fallthrough */
- case -ERESTARTNOINTR:
- regs->regs[0] = save_r0;
- regs->pc -= instruction_size(
- ctrl_inw(regs->pc - 4));
- break;
- }
- }
/* Set up the stack frame */
if (ka->sa.sa_flags & SA_SIGINFO)
@@ -578,6 +584,9 @@ static void do_signal(struct pt_regs *regs, unsigned int save_r0)
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (signr > 0) {
+ if (regs->sr & 1)
+ handle_syscall_restart(save_r0, regs, &ka.sa);
+
/* Whee! Actually deliver the signal. */
if (handle_signal(signr, &ka, &info, oldset,
regs, save_r0) == 0) {