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sparc64: Use a TS_RESTORE_SIGMASK

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This mirrors x86 changeset 5a8da0ea82
("signals: x86 TS_RESTORE_SIGMASK") on sparc64.

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2008-05-12 22:45:15 -07:00
parent faa6cfde74
commit 9a28dbf8af
4 changed files with 44 additions and 24 deletions
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6
arch/sparc64/kernel/rtrap.S
View file

@ -46,7 +46,7 @@ __handle_user_windows:
wrpr %g0, RTRAP_PSTATE_IRQOFF, %pstate
ldx [%g6 + TI_FLAGS], %l0
1: andcc %l0, (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), %g0
1: andcc %l0, _TIF_SIGPENDING, %g0
be,pt %xcc, __handle_user_windows_continue
nop
mov %l5, %o1
@ -86,7 +86,7 @@ __handle_perfctrs:
wrpr %g0, RTRAP_PSTATE, %pstate
wrpr %g0, RTRAP_PSTATE_IRQOFF, %pstate
ldx [%g6 + TI_FLAGS], %l0
1: andcc %l0, (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), %g0
1: andcc %l0, _TIF_SIGPENDING, %g0
be,pt %xcc, __handle_perfctrs_continue
sethi %hi(TSTATE_PEF), %o0
@ -195,7 +195,7 @@ __handle_preemption_continue:
andcc %l1, %o0, %g0
andcc %l0, _TIF_NEED_RESCHED, %g0
bne,pn %xcc, __handle_preemption
andcc %l0, (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK), %g0
andcc %l0, _TIF_SIGPENDING, %g0
bne,pn %xcc, __handle_signal
__handle_signal_continue:
ldub [%g6 + TI_WSAVED], %o2

21
arch/sparc64/kernel/signal.c
View file

@ -247,7 +247,9 @@ static long _sigpause_common(old_sigset_t set)
current->state = TASK_INTERRUPTIBLE;
schedule();
set_thread_flag(TIF_RESTORE_SIGMASK);
set_restore_sigmask();
return -ERESTARTNOHAND;
}
@ -537,7 +539,7 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
} else
restart_syscall = 0;
if (test_thread_flag(TIF_RESTORE_SIGMASK))
if (current_thread_info()->status & TS_RESTORE_SIGMASK)
oldset = &current->saved_sigmask;
else
oldset = &current->blocked;
@ -566,13 +568,12 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
syscall_restart(orig_i0, regs, &ka.sa);
handle_signal(signr, &ka, &info, oldset, regs);
/* a signal was successfully delivered; the saved
/* A signal was successfully delivered; the saved
* sigmask will have been stored in the signal frame,
* and will be restored by sigreturn, so we can simply
* clear the TIF_RESTORE_SIGMASK flag.
* clear the TS_RESTORE_SIGMASK flag.
*/
if (test_thread_flag(TIF_RESTORE_SIGMASK))
clear_thread_flag(TIF_RESTORE_SIGMASK);
current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
return;
}
if (restart_syscall &&
@ -591,17 +592,17 @@ static void do_signal(struct pt_regs *regs, unsigned long orig_i0)
regs->tnpc -= 4;
}
/* if there's no signal to deliver, we just put the saved sigmask
/* If there's no signal to deliver, we just put the saved sigmask
* back
*/
if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
clear_thread_flag(TIF_RESTORE_SIGMASK);
if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
}
}
void do_notify_resume(struct pt_regs *regs, unsigned long orig_i0, unsigned long thread_info_flags)
{
if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
if (thread_info_flags & _TIF_SIGPENDING)
do_signal(regs, orig_i0);
}

13
arch/sparc64/kernel/signal32.c
View file

@ -788,13 +788,12 @@ void do_signal32(sigset_t *oldset, struct pt_regs * regs,
syscall_restart32(orig_i0, regs, &ka.sa);
handle_signal32(signr, &ka, &info, oldset, regs);
/* a signal was successfully delivered; the saved
/* A signal was successfully delivered; the saved
* sigmask will have been stored in the signal frame,
* and will be restored by sigreturn, so we can simply
* clear the TIF_RESTORE_SIGMASK flag.
* clear the TS_RESTORE_SIGMASK flag.
*/
if (test_thread_flag(TIF_RESTORE_SIGMASK))
clear_thread_flag(TIF_RESTORE_SIGMASK);
current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
return;
}
if (restart_syscall &&
@ -813,11 +812,11 @@ void do_signal32(sigset_t *oldset, struct pt_regs * regs,
regs->tnpc -= 4;
}
/* if there's no signal to deliver, we just put the saved sigmask
/* If there's no signal to deliver, we just put the saved sigmask
* back
*/
if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
clear_thread_flag(TIF_RESTORE_SIGMASK);
if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
}
}

28
include/asm-sparc64/thread_info.h
View file

@ -38,7 +38,7 @@ struct thread_info {
struct task_struct *task;
unsigned long flags;
__u8 fpsaved[7];
__u8 pad;
__u8 status;
unsigned long ksp;
/* D$ line 2 */
@ -217,7 +217,7 @@ register struct thread_info *current_thread_info_reg asm("g6");
* nop
*/
#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
#define TIF_RESTORE_SIGMASK 1 /* restore signal mask in do_signal() */
/* flags bit 1 is available */
#define TIF_SIGPENDING 2 /* signal pending */
#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
#define TIF_PERFCTR 4 /* performance counters active */
@ -244,14 +244,34 @@ register struct thread_info *current_thread_info_reg asm("g6");
#define _TIF_32BIT (1<<TIF_32BIT)
#define _TIF_SECCOMP (1<<TIF_SECCOMP)
#define _TIF_SYSCALL_AUDIT (1<<TIF_SYSCALL_AUDIT)
#define _TIF_RESTORE_SIGMASK (1<<TIF_RESTORE_SIGMASK)
#define _TIF_ABI_PENDING (1<<TIF_ABI_PENDING)
#define _TIF_POLLING_NRFLAG (1<<TIF_POLLING_NRFLAG)
#define _TIF_USER_WORK_MASK ((0xff << TI_FLAG_WSAVED_SHIFT) | \
(_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK | \
(_TIF_SIGPENDING | \
_TIF_NEED_RESCHED | _TIF_PERFCTR))
/*
* Thread-synchronous status.
*
* This is different from the flags in that nobody else
* ever touches our thread-synchronous status, so we don't
* have to worry about atomic accesses.
*
* Note that there are only 8 bits available.
*/
#define TS_RESTORE_SIGMASK 0x0001 /* restore signal mask in do_signal() */
#ifndef __ASSEMBLY__
#define HAVE_SET_RESTORE_SIGMASK 1
static inline void set_restore_sigmask(void)
{
struct thread_info *ti = current_thread_info();
ti->status |= TS_RESTORE_SIGMASK;
set_bit(TIF_SIGPENDING, &ti->flags);
}
#endif /* !__ASSEMBLY__ */
#endif /* __KERNEL__ */
#endif /* _ASM_THREAD_INFO_H */