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authorAl Viro <viro@zeniv.linux.org.uk>2010-10-11 17:09:20 -0400
committerGeert Uytterhoeven <geert@linux-m68k.org>2011-01-07 14:06:59 +0100
commit710e91e455caf5cfec02892d667b41f312ec166c (patch)
tree9e6f3d5c3dcb387809cab3cbc04060768b8a75db /arch/m68knommu
parentbf814b45d560b22e8657ca44d0ae6941ab9d8d36 (diff)
downloadop-kernel-dev-710e91e455caf5cfec02892d667b41f312ec166c.zip
op-kernel-dev-710e91e455caf5cfec02892d667b41f312ec166c.tar.gz
m68knommu: Switch to saner sigsuspend
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Acked-by: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68knommu')
-rw-r--r--arch/m68knommu/kernel/entry.S16
-rw-r--r--arch/m68knommu/kernel/signal.c63
-rw-r--r--arch/m68knommu/platform/68328/entry.S3
-rw-r--r--arch/m68knommu/platform/68360/entry.S3
-rw-r--r--arch/m68knommu/platform/coldfire/entry.S3
5 files changed, 22 insertions, 66 deletions
diff --git a/arch/m68knommu/kernel/entry.S b/arch/m68knommu/kernel/entry.S
index aff6f57..2783f25 100644
--- a/arch/m68knommu/kernel/entry.S
+++ b/arch/m68knommu/kernel/entry.S
@@ -112,22 +112,6 @@ ENTRY(sys_clone)
RESTORE_SWITCH_STACK
rts
-ENTRY(sys_sigsuspend)
- SAVE_SWITCH_STACK
- pea %sp@(SWITCH_STACK_SIZE)
- jbsr do_sigsuspend
- addql #4,%sp
- RESTORE_SWITCH_STACK
- rts
-
-ENTRY(sys_rt_sigsuspend)
- SAVE_SWITCH_STACK
- pea %sp@(SWITCH_STACK_SIZE)
- jbsr do_rt_sigsuspend
- addql #4,%sp
- RESTORE_SWITCH_STACK
- rts
-
ENTRY(sys_sigreturn)
SAVE_SWITCH_STACK
jbsr do_sigreturn
diff --git a/arch/m68knommu/kernel/signal.c b/arch/m68knommu/kernel/signal.c
index 1934de7..c973230 100644
--- a/arch/m68knommu/kernel/signal.c
+++ b/arch/m68knommu/kernel/signal.c
@@ -53,60 +53,25 @@
void ret_from_user_signal(void);
void ret_from_user_rt_signal(void);
-asmlinkage int do_signal(sigset_t *oldset, struct pt_regs *regs);
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
-asmlinkage int do_sigsuspend(struct pt_regs *regs)
+asmlinkage int
+sys_sigsuspend(int unused0, int unused1, old_sigset_t mask)
{
- old_sigset_t mask = regs->d3;
- sigset_t saveset;
-
mask &= _BLOCKABLE;
spin_lock_irq(&current->sighand->siglock);
- saveset = current->blocked;
+ current->saved_sigmask = current->blocked;
siginitset(&current->blocked, mask);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
- regs->d0 = -EINTR;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- if (do_signal(&saveset, regs))
- return -EINTR;
- }
-}
-
-asmlinkage int
-do_rt_sigsuspend(struct pt_regs *regs)
-{
- sigset_t *unewset = (sigset_t *)regs->d1;
- size_t sigsetsize = (size_t)regs->d2;
- sigset_t saveset, newset;
-
- /* XXX: Don't preclude handling different sized sigset_t's. */
- if (sigsetsize != sizeof(sigset_t))
- return -EINVAL;
-
- if (copy_from_user(&newset, unewset, sizeof(newset)))
- return -EFAULT;
- sigdelsetmask(&newset, ~_BLOCKABLE);
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+ set_restore_sigmask();
- spin_lock_irq(&current->sighand->siglock);
- saveset = current->blocked;
- current->blocked = newset;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
- regs->d0 = -EINTR;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- if (do_signal(&saveset, regs))
- return -EINTR;
- }
+ return -ERESTARTNOHAND;
}
asmlinkage int
@@ -752,11 +717,12 @@ handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info,
* want to handle. Thus you cannot kill init even with a SIGKILL even by
* mistake.
*/
-asmlinkage int do_signal(sigset_t *oldset, struct pt_regs *regs)
+asmlinkage int do_signal(struct pt_regs *regs)
{
struct k_sigaction ka;
siginfo_t info;
int signr;
+ sigset_t *oldset;
/*
* We want the common case to go fast, which
@@ -767,13 +733,16 @@ asmlinkage int do_signal(sigset_t *oldset, struct pt_regs *regs)
if (!user_mode(regs))
return 1;
- if (!oldset)
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ oldset = &current->saved_sigmask;
+ else
oldset = &current->blocked;
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (signr > 0) {
/* Whee! Actually deliver the signal. */
handle_signal(signr, &ka, &info, oldset, regs);
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
return 1;
}
@@ -782,5 +751,11 @@ asmlinkage int do_signal(sigset_t *oldset, struct pt_regs *regs)
/* Restart the system call - no handlers present */
handle_restart(regs, NULL, 0);
}
+
+ /* If there's no signal to deliver, we just restore the saved mask. */
+ if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+ sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
+ }
return 0;
}
diff --git a/arch/m68knommu/platform/68328/entry.S b/arch/m68knommu/platform/68328/entry.S
index 27241e1..6eeb635 100644
--- a/arch/m68knommu/platform/68328/entry.S
+++ b/arch/m68knommu/platform/68328/entry.S
@@ -120,9 +120,8 @@ Lsignal_return:
subql #4,%sp /* dummy return address*/
SAVE_SWITCH_STACK
pea %sp@(SWITCH_STACK_SIZE)
- clrl %sp@-
bsrw do_signal
- addql #8,%sp
+ addql #4,%sp
RESTORE_SWITCH_STACK
addql #4,%sp
Lreturn:
diff --git a/arch/m68knommu/platform/68360/entry.S b/arch/m68knommu/platform/68360/entry.S
index c131c6e..2a671da 100644
--- a/arch/m68knommu/platform/68360/entry.S
+++ b/arch/m68knommu/platform/68360/entry.S
@@ -116,9 +116,8 @@ Lsignal_return:
subql #4,%sp /* dummy return address*/
SAVE_SWITCH_STACK
pea %sp@(SWITCH_STACK_SIZE)
- clrl %sp@-
bsrw do_signal
- addql #8,%sp
+ addql #4,%sp
RESTORE_SWITCH_STACK
addql #4,%sp
Lreturn:
diff --git a/arch/m68knommu/platform/coldfire/entry.S b/arch/m68knommu/platform/coldfire/entry.S
index 5e92bed..ed28788 100644
--- a/arch/m68knommu/platform/coldfire/entry.S
+++ b/arch/m68knommu/platform/coldfire/entry.S
@@ -167,9 +167,8 @@ Lsignal_return:
subql #4,%sp /* dummy return address */
SAVE_SWITCH_STACK
pea %sp@(SWITCH_STACK_SIZE)
- clrl %sp@-
jsr do_signal
- addql #8,%sp
+ addql #4,%sp
RESTORE_SWITCH_STACK
addql #4,%sp
jmp Lreturn
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