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authorLinus Torvalds <torvalds@linux-foundation.org>2012-06-01 11:53:44 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-06-01 11:53:44 -0700
commit86c47b70f62a7072d441ba212aab33c2f82627c2 (patch)
treed03988bd2226966352bb7f3c2e82ff545353d2c4 /arch/m32r
parent1193755ac6328ad240ba987e6ec41d5e8baf0680 (diff)
parent44fbbb3dc687c9709a6f2236197316e5c79ab1eb (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull third pile of signal handling patches from Al Viro: "This time it's mostly helpers and conversions to them; there's a lot of stuff remaining in the tree, but that'll either go in -rc2 (isolated bug fixes, ideally via arch maintainers' trees) or will sit there until the next cycle." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: x86: get rid of calling do_notify_resume() when returning to kernel mode blackfin: check __get_user() return value whack-a-mole with TIF_FREEZE FRV: Optimise the system call exit path in entry.S [ver #2] FRV: Shrink TIF_WORK_MASK [ver #2] FRV: Prevent syscall exit tracing and notify_resume at end of kernel exceptions new helper: signal_delivered() powerpc: get rid of restore_sigmask() most of set_current_blocked() callers want SIGKILL/SIGSTOP removed from set set_restore_sigmask() is never called without SIGPENDING (and never should be) TIF_RESTORE_SIGMASK can be set only when TIF_SIGPENDING is set don't call try_to_freeze() from do_signal() pull clearing RESTORE_SIGMASK into block_sigmask() sh64: failure to build sigframe != signal without handler openrisc: tracehook_signal_handler() is supposed to be called on success new helper: sigmask_to_save() new helper: restore_saved_sigmask() new helpers: {clear,test,test_and_clear}_restore_sigmask() HAVE_RESTORE_SIGMASK is defined on all architectures now
Diffstat (limited to 'arch/m32r')
-rw-r--r--arch/m32r/kernel/signal.c32
1 files changed, 7 insertions, 25 deletions
diff --git a/arch/m32r/kernel/signal.c b/arch/m32r/kernel/signal.c
index 64804f1f5141..f3fb2c029cfc 100644
--- a/arch/m32r/kernel/signal.c
+++ b/arch/m32r/kernel/signal.c
@@ -28,8 +28,6 @@
#define DEBUG_SIG 0
-#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-
asmlinkage int
sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
unsigned long r2, unsigned long r3, unsigned long r4,
@@ -111,7 +109,6 @@ sys_rt_sigreturn(unsigned long r0, unsigned long r1,
if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
goto badframe;
- sigdelsetmask(&set, ~_BLOCKABLE);
set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &result))
@@ -267,9 +264,9 @@ static int prev_insn(struct pt_regs *regs)
* OK, we're invoking a handler
*/
-static int
+static void
handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
- sigset_t *oldset, struct pt_regs *regs)
+ struct pt_regs *regs)
{
/* Are we from a system call? */
if (regs->syscall_nr >= 0) {
@@ -294,11 +291,10 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
}
/* Set up the stack frame */
- if (setup_rt_frame(sig, ka, info, oldset, regs))
- return -EFAULT;
+ if (setup_rt_frame(sig, ka, info, sigmask_to_save(), regs))
+ return;
- block_sigmask(ka, sig);
- return 0;
+ signal_delivered(sig, info, ka, regs, 0);
}
/*
@@ -311,7 +307,6 @@ static void do_signal(struct pt_regs *regs)
siginfo_t info;
int signr;
struct k_sigaction ka;
- sigset_t *oldset;
/*
* We want the common case to go fast, which
@@ -322,14 +317,6 @@ static void do_signal(struct pt_regs *regs)
if (!user_mode(regs))
return;
- if (try_to_freeze())
- goto no_signal;
-
- 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) {
/* Re-enable any watchpoints before delivering the
@@ -339,13 +326,11 @@ static void do_signal(struct pt_regs *regs)
*/
/* Whee! Actually deliver the signal. */
- if (handle_signal(signr, &ka, &info, oldset, regs) == 0)
- clear_thread_flag(TIF_RESTORE_SIGMASK);
+ handle_signal(signr, &ka, &info, regs);
return;
}
- no_signal:
/* Did we come from a system call? */
if (regs->syscall_nr >= 0) {
/* Restart the system call - no handlers present */
@@ -360,10 +345,7 @@ static void do_signal(struct pt_regs *regs)
prev_insn(regs);
}
}
- if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
- clear_thread_flag(TIF_RESTORE_SIGMASK);
- sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
- }
+ restore_saved_sigmask();
}
/*