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authorPaul Mundt <lethal@linux-sh.org>2006-09-27 17:22:49 +0900
committerPaul Mundt <lethal@linux-sh.org>2006-09-27 17:22:49 +0900
commit0b8929354cdeddb17e81bfda903812c9adfd0b67 (patch)
treeff3a450e750752bfde6afe414ee0c1b0eea3ac8e /arch/sh
parente96636ccfa373a00a0ee0558e1971baa7856d8b5 (diff)
sh: __NR_restart_syscall support.
This implements support for __NR_restart_syscall. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh')
-rw-r--r--arch/sh/kernel/entry.S2
-rw-r--r--arch/sh/kernel/signal.c16
-rw-r--r--arch/sh/kernel/syscalls.S2
3 files changed, 13 insertions, 7 deletions
diff --git a/arch/sh/kernel/entry.S b/arch/sh/kernel/entry.S
index b087d34dba35..fcbf50d4ee10 100644
--- a/arch/sh/kernel/entry.S
+++ b/arch/sh/kernel/entry.S
@@ -376,6 +376,7 @@ work_notifysig:
bt/s restore_all
mov r15, r4
mov #0, r5
+ mov r12, r6 ! set arg2(save_r0)
mov.l 2f, r1
mova restore_all, r0
jmp @r1
@@ -534,6 +535,7 @@ syscall_call:
mov.l @r9, r8
jsr @r8 ! jump to specific syscall handler
nop
+ mov.l @(OFF_R0,r15), r12 ! save r0
mov.l r0, @(OFF_R0,r15) ! save the return value
!
syscall_exit:
diff --git a/arch/sh/kernel/signal.c b/arch/sh/kernel/signal.c
index b475c4d2405f..eb6a3b97e46c 100644
--- a/arch/sh/kernel/signal.c
+++ b/arch/sh/kernel/signal.c
@@ -33,7 +33,8 @@
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset);
+asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset,
+ unsigned int save_r0);
/*
* Atomically swap in the new signal mask, and wait for a signal.
@@ -56,7 +57,7 @@ sys_sigsuspend(old_sigset_t mask,
while (1) {
current->state = TASK_INTERRUPTIBLE;
schedule();
- if (do_signal(&regs, &saveset))
+ if (do_signal(&regs, &saveset, regs.regs[0]))
return -EINTR;
}
}
@@ -85,7 +86,7 @@ sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize,
while (1) {
current->state = TASK_INTERRUPTIBLE;
schedule();
- if (do_signal(&regs, &saveset))
+ if (do_signal(&regs, &saveset, regs.regs[0]))
return -EINTR;
}
}
@@ -563,7 +564,7 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
* the kernel can handle, and then we build all the user-level signal handling
* stack-frames in one go after that.
*/
-int do_signal(struct pt_regs *regs, sigset_t *oldset)
+int do_signal(struct pt_regs *regs, sigset_t *oldset, unsigned int save_r0)
{
siginfo_t info;
int signr;
@@ -597,9 +598,12 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset)
/* Restart the system call - no handlers present */
if (regs->regs[0] == -ERESTARTNOHAND ||
regs->regs[0] == -ERESTARTSYS ||
- regs->regs[0] == -ERESTARTNOINTR ||
- regs->regs[0] == -ERESTART_RESTARTBLOCK) {
+ regs->regs[0] == -ERESTARTNOINTR) {
+ regs->regs[0] = save_r0;
regs->pc -= 2;
+ } else if (regs->regs[0] == -ERESTART_RESTARTBLOCK) {
+ regs->pc -= 2;
+ regs->regs[3] = __NR_restart_syscall;
}
}
return 0;
diff --git a/arch/sh/kernel/syscalls.S b/arch/sh/kernel/syscalls.S
index ada61b0d9a73..ea23b213c77f 100644
--- a/arch/sh/kernel/syscalls.S
+++ b/arch/sh/kernel/syscalls.S
@@ -34,7 +34,7 @@
.data
ENTRY(sys_call_table)
- .long sys_ni_syscall /* 0 - old "setup()" system call*/
+ .long sys_restart_syscall /* 0 - old "setup()" system call*/
.long sys_exit
.long sys_fork
.long sys_read