From a7f8388e2c167c73b6abb3b749157aafd08f90ee Mon Sep 17 00:00:00 2001 From: Al Viro Date: Fri, 24 Sep 2010 06:20:35 +0100 Subject: m32r: fix rt_sigsuspend() do_signal() should know about saved_mask for it to work... Signed-off-by: Al Viro Signed-off-by: Linus Torvalds --- arch/m32r/kernel/entry.S | 3 +-- arch/m32r/kernel/signal.c | 48 ++++++++++++----------------------------------- 2 files changed, 13 insertions(+), 38 deletions(-) (limited to 'arch/m32r/kernel') diff --git a/arch/m32r/kernel/entry.S b/arch/m32r/kernel/entry.S index 403869833b98..90149daa560f 100644 --- a/arch/m32r/kernel/entry.S +++ b/arch/m32r/kernel/entry.S @@ -235,8 +235,7 @@ work_resched: work_notifysig: ; deal with pending signals and ; notify-resume requests mv r0, sp ; arg1 : struct pt_regs *regs - ldi r1, #0 ; arg2 : sigset_t *oldset - mv r2, r9 ; arg3 : __u32 thread_info_flags + ldi r1, r9 ; arg2 : __u32 thread_info_flags bl do_notify_resume bra restore_all diff --git a/arch/m32r/kernel/signal.c b/arch/m32r/kernel/signal.c index 144b0f124fc7..acd69f7f3357 100644 --- a/arch/m32r/kernel/signal.c +++ b/arch/m32r/kernel/signal.c @@ -28,37 +28,6 @@ #define DEBUG_SIG 0 -#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) - -int do_signal(struct pt_regs *, sigset_t *); - -asmlinkage int -sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize, - unsigned long r2, unsigned long r3, unsigned long r4, - unsigned long r5, unsigned long r6, struct pt_regs *regs) -{ - sigset_t 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, sigmask(SIGKILL)|sigmask(SIGSTOP)); - - spin_lock_irq(¤t->sighand->siglock); - current->saved_sigmask = current->blocked; - current->blocked = newset; - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - - current->state = TASK_INTERRUPTIBLE; - schedule(); - set_thread_flag(TIF_RESTORE_SIGMASK); - return -ERESTARTNOHAND; -} - asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss, unsigned long r2, unsigned long r3, unsigned long r4, @@ -332,12 +301,13 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info, * want to handle. Thus you cannot kill init even with a SIGKILL even by * mistake. */ -int do_signal(struct pt_regs *regs, sigset_t *oldset) +static int do_signal(struct pt_regs *regs) { siginfo_t info; int signr; struct k_sigaction ka; unsigned short inst; + sigset_t *oldset; /* * We want the common case to go fast, which @@ -351,7 +321,9 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset) if (try_to_freeze()) goto no_signal; - if (!oldset) + if (test_thread_flag(TIF_RESTORE_SIGMASK)) + oldset = ¤t->saved_sigmask; + else oldset = ¤t->blocked; signr = get_signal_to_deliver(&info, &ka, regs, NULL); @@ -364,6 +336,7 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset) /* Whee! Actually deliver the signal. */ handle_signal(signr, &ka, &info, oldset, regs); + clear_thread_flag(TIF_RESTORE_SIGMASK); return 1; } @@ -391,6 +364,10 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset) regs->bpc -= 4; } } + if (test_thread_flag(TIF_RESTORE_SIGMASK)) { + clear_thread_flag(TIF_RESTORE_SIGMASK); + sigprocmask(SIG_SETMASK, ¤t->saved_sigmask, NULL); + } return 0; } @@ -398,8 +375,7 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset) * notification of userspace execution resumption * - triggered by current->work.notify_resume */ -void do_notify_resume(struct pt_regs *regs, sigset_t *oldset, - __u32 thread_info_flags) +void do_notify_resume(struct pt_regs *regs, __u32 thread_info_flags) { /* Pending single-step? */ if (thread_info_flags & _TIF_SINGLESTEP) @@ -407,7 +383,7 @@ void do_notify_resume(struct pt_regs *regs, sigset_t *oldset, /* deal with pending signal delivery */ if (thread_info_flags & _TIF_SIGPENDING) - do_signal(regs,oldset); + do_signal(regs); if (thread_info_flags & _TIF_NOTIFY_RESUME) { clear_thread_flag(TIF_NOTIFY_RESUME); -- cgit v1.2.3-59-g8ed1b