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Diffstat (limited to 'arch/xtensa/kernel/signal.c')
-rw-r--r--arch/xtensa/kernel/signal.c54
1 files changed, 15 insertions, 39 deletions
diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c
index 44e9329a6484..bb00cc470ca9 100644
--- a/arch/xtensa/kernel/signal.c
+++ b/arch/xtensa/kernel/signal.c
@@ -31,8 +31,6 @@
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset);
-
extern struct task_struct *coproc_owners[];
struct rt_sigframe
@@ -429,37 +427,6 @@ give_sigsegv:
return -EFAULT;
}
-/*
- * Atomically swap in the new signal mask, and wait for a signal.
- */
-
-asmlinkage long xtensa_rt_sigsuspend(sigset_t __user *unewset,
- size_t sigsetsize,
- long a2, long a3, long a4, long a5,
- struct pt_regs *regs)
-{
- 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);
- saveset = current->blocked;
- set_current_blocked(&newset);
-
- regs->areg[2] = -EINTR;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- if (do_signal(regs, &saveset))
- return -EINTR;
- }
-}
-
asmlinkage long xtensa_sigaltstack(const stack_t __user *uss,
stack_t __user *uoss,
long a2, long a3, long a4, long a5,
@@ -479,19 +446,22 @@ asmlinkage long xtensa_sigaltstack(const stack_t __user *uss,
* 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)
+void do_signal(struct pt_regs *regs)
{
siginfo_t info;
int signr;
struct k_sigaction ka;
+ sigset_t oldset;
if (!user_mode(regs))
- return 0;
+ return;
if (try_to_freeze())
goto no_signal;
- if (!oldset)
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ oldset = &current->saved_sigmask;
+ else
oldset = &current->blocked;
task_pt_regs(current)->icountlevel = 0;
@@ -535,13 +505,14 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset)
/* Set up the stack frame */
ret = setup_frame(signr, &ka, &info, oldset, regs);
if (ret)
- return ret;
+ return;
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
block_sigmask(&ka, signr);
if (current->ptrace & PT_SINGLESTEP)
task_pt_regs(current)->icountlevel = 1;
- return 1;
+ return;
}
no_signal:
@@ -561,8 +532,13 @@ no_signal:
break;
}
}
+
+ /* If there's no signal to deliver, we just restore the saved mask. */
+ if (test_and_clear_thread_flag(TIF_RESTORE_SIGMASK))
+ set_current_blocked(&current->saved_sigmask);
+
if (current->ptrace & PT_SINGLESTEP)
task_pt_regs(current)->icountlevel = 1;
- return 0;
+ return;
}