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authorLinus Torvalds <torvalds@linux-foundation.org>2012-05-23 18:11:45 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-05-23 18:11:45 -0700
commitf9369910a6225b8d4892c3f20ae740a711cd5ace (patch)
tree8650ff79d7607bceb35509c028400ecf1c317de0 /arch
parent05f144a0d5c2207a0349348127f996e104ad7404 (diff)
parent415d04d08fec74b226c92c1fb54ad117c9c6bac4 (diff)
downloadlinux-linaro-stable-f9369910a6225b8d4892c3f20ae740a711cd5ace.tar.gz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull first series of signal handling cleanups from Al Viro: "This is just the first part of the queue (about a half of it); assorted fixes all over the place in signal handling. This one ends with all sigsuspend() implementations switched to generic one (->saved_sigmask-based). With this, a bunch of assorted old buglets are fixed and most of the missing bits of NOTIFY_RESUME hookup are in place. Two more fixes sit in arm and um trees respectively, and there's a couple of broken ones that need obvious fixes - parisc and avr32 check TIF_NOTIFY_RESUME only on one of two codepaths; fixes for that will happen in the next series" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (55 commits) unicore32: if there's no handler we need to restore sigmask, syscall or no syscall xtensa: add handling of TIF_NOTIFY_RESUME microblaze: drop 'oldset' argument of do_notify_resume() microblaze: handle TIF_NOTIFY_RESUME score: add handling of NOTIFY_RESUME to do_notify_resume() m68k: add TIF_NOTIFY_RESUME and handle it. sparc: kill ancient comment in sparc_sigaction() h8300: missing checks of __get_user()/__put_user() return values frv: missing checks of __get_user()/__put_user() return values cris: missing checks of __get_user()/__put_user() return values powerpc: missing checks of __get_user()/__put_user() return values sh: missing checks of __get_user()/__put_user() return values sparc: missing checks of __get_user()/__put_user() return values avr32: struct old_sigaction is never used m32r: struct old_sigaction is never used xtensa: xtensa_sigaction doesn't exist alpha: tidy signal delivery up score: don't open-code force_sigsegv() cris: don't open-code force_sigsegv() blackfin: don't open-code force_sigsegv() ...
Diffstat (limited to 'arch')
-rw-r--r--arch/alpha/kernel/signal.c80
-rw-r--r--arch/arm/kernel/signal.c11
-rw-r--r--arch/avr32/include/asm/signal.h7
-rw-r--r--arch/avr32/kernel/signal.c30
-rw-r--r--arch/blackfin/kernel/signal.c21
-rw-r--r--arch/c6x/kernel/signal.c3
-rw-r--r--arch/cris/arch-v10/kernel/signal.c50
-rw-r--r--arch/cris/arch-v32/kernel/signal.c66
-rw-r--r--arch/frv/kernel/signal.c47
-rw-r--r--arch/h8300/include/asm/unistd.h1
-rw-r--r--arch/h8300/kernel/signal.c122
-rw-r--r--arch/h8300/kernel/syscalls.S6
-rw-r--r--arch/hexagon/kernel/signal.c4
-rw-r--r--arch/ia64/kernel/signal.c15
-rw-r--r--arch/m32r/include/asm/signal.h7
-rw-r--r--arch/m32r/kernel/signal.c12
-rw-r--r--arch/m68k/include/asm/thread_info.h1
-rw-r--r--arch/m68k/kernel/entry_mm.S6
-rw-r--r--arch/m68k/kernel/signal.c41
-rw-r--r--arch/m68k/platform/68328/entry.S2
-rw-r--r--arch/m68k/platform/68360/entry.S2
-rw-r--r--arch/m68k/platform/coldfire/entry.S2
-rw-r--r--arch/microblaze/kernel/entry-nommu.S20
-rw-r--r--arch/microblaze/kernel/entry.S30
-rw-r--r--arch/microblaze/kernel/signal.c85
-rw-r--r--arch/mips/kernel/signal.c20
-rw-r--r--arch/mips/kernel/signal32.c20
-rw-r--r--arch/mips/kernel/signal_n32.c10
-rw-r--r--arch/mn10300/kernel/signal.c35
-rw-r--r--arch/parisc/kernel/signal.c15
-rw-r--r--arch/powerpc/kernel/signal_32.c17
-rw-r--r--arch/s390/kernel/signal.c9
-rw-r--r--arch/score/kernel/signal.c29
-rw-r--r--arch/sh/include/asm/syscalls_32.h4
-rw-r--r--arch/sh/include/asm/unistd.h4
-rw-r--r--arch/sh/kernel/signal_32.c53
-rw-r--r--arch/sh/kernel/signal_64.c84
-rw-r--r--arch/sparc/kernel/signal32.c10
-rw-r--r--arch/sparc/kernel/signal_32.c12
-rw-r--r--arch/sparc/kernel/signal_64.c13
-rw-r--r--arch/sparc/kernel/sys_sparc_32.c17
-rw-r--r--arch/um/kernel/signal.c9
-rw-r--r--arch/unicore32/kernel/signal.c18
-rw-r--r--arch/x86/ia32/ia32_signal.c12
-rw-r--r--arch/x86/kernel/signal.c12
-rw-r--r--arch/xtensa/include/asm/signal.h7
-rw-r--r--arch/xtensa/include/asm/syscall.h4
-rw-r--r--arch/xtensa/include/asm/thread_info.h1
-rw-r--r--arch/xtensa/include/asm/unistd.h2
-rw-r--r--arch/xtensa/kernel/entry.S6
-rw-r--r--arch/xtensa/kernel/signal.c73
51 files changed, 368 insertions, 799 deletions
diff --git a/arch/alpha/kernel/signal.c b/arch/alpha/kernel/signal.c
index 35f2ef44de12..10ab2d74ecbb 100644
--- a/arch/alpha/kernel/signal.c
+++ b/arch/alpha/kernel/signal.c
@@ -34,9 +34,6 @@
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
asmlinkage void ret_from_sys_call(void);
-static void do_signal(struct pt_regs *, struct switch_stack *,
- unsigned long, unsigned long);
-
/*
* The OSF/1 sigprocmask calling sequence is different from the
@@ -121,17 +118,8 @@ SYSCALL_DEFINE5(rt_sigaction, int, sig, const struct sigaction __user *, act,
SYSCALL_DEFINE1(sigsuspend, old_sigset_t, mask)
{
sigset_t blocked;
-
- current->saved_sigmask = current->blocked;
-
- mask &= _BLOCKABLE;
siginitset(&blocked, mask);
- set_current_blocked(&blocked);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_thread_flag(TIF_RESTORE_SIGMASK);
- return -ERESTARTNOHAND;
+ return sigsuspend(&blocked);
}
asmlinkage int
@@ -376,11 +364,11 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
oldsp = rdusp();
frame = get_sigframe(ka, oldsp, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- goto give_sigsegv;
+ return -EFAULT;
err |= setup_sigcontext(&frame->sc, regs, sw, set->sig[0], oldsp);
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
@@ -396,7 +384,7 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
/* Check that everything was written properly. */
if (err)
- goto give_sigsegv;
+ return err;
/* "Return" to the handler */
regs->r26 = r26;
@@ -410,12 +398,7 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
printk("SIG deliver (%s:%d): sp=%p pc=%p ra=%p\n",
current->comm, current->pid, frame, regs->pc, regs->r26);
#endif
-
return 0;
-
-give_sigsegv:
- force_sigsegv(sig, current);
- return -EFAULT;
}
static int
@@ -428,7 +411,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
oldsp = rdusp();
frame = get_sigframe(ka, oldsp, sizeof(*frame));
if (!access_ok(VERIFY_WRITE, frame, sizeof(*frame)))
- goto give_sigsegv;
+ return -EFAULT;
err |= copy_siginfo_to_user(&frame->info, info);
@@ -443,7 +426,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
set->sig[0], oldsp);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/* Set up to return from userspace. If provided, use a stub
already in userspace. */
@@ -459,7 +442,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
}
if (err)
- goto give_sigsegv;
+ return -EFAULT;
/* "Return" to the handler */
regs->r26 = r26;
@@ -475,31 +458,37 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
#endif
return 0;
-
-give_sigsegv:
- force_sigsegv(sig, current);
- return -EFAULT;
}
/*
* OK, we're invoking a handler.
*/
-static inline int
+static inline void
handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info,
- sigset_t *oldset, struct pt_regs * regs, struct switch_stack *sw)
+ struct pt_regs * regs, struct switch_stack *sw)
{
+ sigset_t *oldset = &current->blocked;
int ret;
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ oldset = &current->saved_sigmask;
+
if (ka->sa.sa_flags & SA_SIGINFO)
ret = setup_rt_frame(sig, ka, info, oldset, regs, sw);
else
ret = setup_frame(sig, ka, oldset, regs, sw);
- if (ret == 0)
- block_sigmask(ka, sig);
-
- return ret;
+ if (ret) {
+ force_sigsegv(sig, current);
+ return;
+ }
+ block_sigmask(ka, sig);
+ /* A signal was successfully delivered, and the
+ saved sigmask was stored on the signal frame,
+ and will be restored by sigreturn. So we can
+ simply clear the restore sigmask flag. */
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
}
static inline void
@@ -547,12 +536,6 @@ do_signal(struct pt_regs * regs, struct switch_stack * sw,
int signr;
unsigned long single_stepping = ptrace_cancel_bpt(current);
struct k_sigaction ka;
- sigset_t *oldset;
-
- if (test_thread_flag(TIF_RESTORE_SIGMASK))
- oldset = &current->saved_sigmask;
- else
- oldset = &current->blocked;
/* This lets the debugger run, ... */
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
@@ -564,14 +547,7 @@ do_signal(struct pt_regs * regs, struct switch_stack * sw,
/* Whee! Actually deliver the signal. */
if (r0)
syscall_restart(r0, r19, regs, &ka);
- if (handle_signal(signr, &ka, &info, oldset, regs, sw) == 0) {
- /* A signal was successfully delivered, and the
- saved sigmask was stored on the signal frame,
- and will be restored by sigreturn. So we can
- simply clear the restore sigmask flag. */
- if (test_thread_flag(TIF_RESTORE_SIGMASK))
- clear_thread_flag(TIF_RESTORE_SIGMASK);
- }
+ handle_signal(signr, &ka, &info, regs, sw);
if (single_stepping)
ptrace_set_bpt(current); /* re-set bpt */
return;
@@ -596,10 +572,8 @@ do_signal(struct pt_regs * regs, struct switch_stack * sw,
}
/* 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);
- }
+ if (test_and_clear_thread_flag(TIF_RESTORE_SIGMASK))
+ set_current_blocked(&current->saved_sigmask);
if (single_stepping)
ptrace_set_bpt(current); /* re-set breakpoint */
@@ -610,7 +584,7 @@ do_notify_resume(struct pt_regs *regs, struct switch_stack *sw,
unsigned long thread_info_flags,
unsigned long r0, unsigned long r19)
{
- if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
+ if (thread_info_flags & _TIF_SIGPENDING)
do_signal(regs, sw, r0, r19);
if (thread_info_flags & _TIF_NOTIFY_RESUME) {
diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c
index 73d9a420850d..4e5fdd9bd9e3 100644
--- a/arch/arm/kernel/signal.c
+++ b/arch/arm/kernel/signal.c
@@ -67,17 +67,8 @@ const unsigned long syscall_restart_code[2] = {
asmlinkage int sys_sigsuspend(int restart, unsigned long oldmask, old_sigset_t mask)
{
sigset_t blocked;
-
- current->saved_sigmask = current->blocked;
-
- mask &= _BLOCKABLE;
siginitset(&blocked, mask);
- set_current_blocked(&blocked);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_restore_sigmask();
- return -ERESTARTNOHAND;
+ return sigsuspend(&blocked);
}
asmlinkage int
diff --git a/arch/avr32/include/asm/signal.h b/arch/avr32/include/asm/signal.h
index 8790dfc10d5b..ae56849fdb2b 100644
--- a/arch/avr32/include/asm/signal.h
+++ b/arch/avr32/include/asm/signal.h
@@ -115,13 +115,6 @@ typedef unsigned long sigset_t;
#include <asm-generic/signal-defs.h>
#ifdef __KERNEL__
-struct old_sigaction {
- __sighandler_t sa_handler;
- old_sigset_t sa_mask;
- unsigned long sa_flags;
- __sigrestore_t sa_restorer;
-};
-
struct sigaction {
__sighandler_t sa_handler;
unsigned long sa_flags;
diff --git a/arch/avr32/kernel/signal.c b/arch/avr32/kernel/signal.c
index 64f886fac2ef..ae386c304bee 100644
--- a/arch/avr32/kernel/signal.c
+++ b/arch/avr32/kernel/signal.c
@@ -77,6 +77,9 @@ asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
struct rt_sigframe __user *frame;
sigset_t set;
+ /* Always make any pending restarted system calls return -EINTR */
+ current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
frame = (struct rt_sigframe __user *)regs->sp;
pr_debug("SIG return: frame = %p\n", frame);
@@ -87,10 +90,7 @@ asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
goto badframe;
@@ -238,22 +238,16 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
*/
ret |= !valid_user_regs(regs);
- /*
- * Block the signal if we were unsuccessful.
- */
- if (ret != 0 || !(ka->sa.sa_flags & SA_NODEFER)) {
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked, &current->blocked,
- &ka->sa.sa_mask);
- sigaddset(&current->blocked, sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
- }
-
- if (ret == 0)
+ if (ret != 0) {
+ force_sigsegv(sig, current);
return;
+ }
- force_sigsegv(sig, current);
+ /*
+ * Block the signal if we were successful.
+ */
+ block_sigmask(ka, sig);
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
}
/*
diff --git a/arch/blackfin/kernel/signal.c b/arch/blackfin/kernel/signal.c
index d536f35d1f43..e5bbc1a5edc2 100644
--- a/arch/blackfin/kernel/signal.c
+++ b/arch/blackfin/kernel/signal.c
@@ -99,10 +99,7 @@ asmlinkage int do_rt_sigreturn(unsigned long __unused)
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (rt_restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0))
goto badframe;
@@ -213,9 +210,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t * info,
return 0;
give_sigsegv:
- if (sig == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
- force_sig(SIGSEGV, current);
+ force_sigsegv(sig, current);
return -EFAULT;
}
@@ -266,15 +261,9 @@ handle_signal(int sig, siginfo_t *info, struct k_sigaction *ka,
/* set up the stack frame */
ret = setup_rt_frame(sig, ka, info, oldset, regs);
- if (ret == 0) {
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked, &current->blocked,
- &ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked, sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
- }
+ if (ret == 0)
+ block_sigmask(ka, sig);
+
return ret;
}
diff --git a/arch/c6x/kernel/signal.c b/arch/c6x/kernel/signal.c
index 3b5a05099989..cf37478c1169 100644
--- a/arch/c6x/kernel/signal.c
+++ b/arch/c6x/kernel/signal.c
@@ -69,6 +69,9 @@ asmlinkage int do_rt_sigreturn(struct pt_regs *regs)
struct rt_sigframe __user *frame;
sigset_t set;
+ /* Always make any pending restarted system calls return -EINTR */
+ current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
/*
* Since we stacked the signal on a dword boundary,
* 'sp' should be dword aligned here. If it's
diff --git a/arch/cris/arch-v10/kernel/signal.c b/arch/cris/arch-v10/kernel/signal.c
index 289c584ba499..e16f8f297f61 100644
--- a/arch/cris/arch-v10/kernel/signal.c
+++ b/arch/cris/arch-v10/kernel/signal.c
@@ -48,19 +48,11 @@ void do_signal(int canrestart, struct pt_regs *regs);
* dummy arguments to be able to reach the regs argument. (Note that this
* arrangement relies on old_sigset_t occupying one register.)
*/
-int sys_sigsuspend(old_sigset_t mask, long r11, long r12, long r13, long mof,
- long srp, struct pt_regs *regs)
+int sys_sigsuspend(old_sigset_t mask)
{
- mask &= _BLOCKABLE;
- spin_lock_irq(&current->sighand->siglock);
- current->saved_sigmask = current->blocked;
- siginitset(&current->blocked, mask);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_thread_flag(TIF_RESTORE_SIGMASK);
- return -ERESTARTNOHAND;
+ sigset_t blocked;
+ siginitset(&blocked, mask);
+ return sigsuspend(&blocked);
}
int sys_sigaction(int sig, const struct old_sigaction __user *act,
@@ -73,10 +65,10 @@ int sys_sigaction(int sig, const struct old_sigaction __user *act,
old_sigset_t mask;
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
- __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
+ __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
+ __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
+ __get_user(mask, &act->sa_mask))
return -EFAULT;
- __get_user(new_ka.sa.sa_flags, &act->sa_flags);
- __get_user(mask, &act->sa_mask);
siginitset(&new_ka.sa.sa_mask, mask);
}
@@ -85,10 +77,10 @@ int sys_sigaction(int sig, const struct old_sigaction __user *act,
if (!ret && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
- __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
+ __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
+ __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
+ __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
- __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
- __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
}
return ret;
@@ -185,10 +177,7 @@ asmlinkage int sys_sigreturn(long r10, long r11, long r12, long r13, long mof,
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->sc))
goto badframe;
@@ -224,10 +213,7 @@ asmlinkage int sys_rt_sigreturn(long r10, long r11, long r12, long r13,
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
goto badframe;
@@ -469,15 +455,9 @@ static inline int handle_signal(int canrestart, unsigned long sig,
else
ret = setup_frame(sig, ka, oldset, regs);
- if (ret == 0) {
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked, &current->blocked,
- &ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked, sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
- }
+ if (ret == 0)
+ block_sigmask(ka, sig);
+
return ret;
}
diff --git a/arch/cris/arch-v32/kernel/signal.c b/arch/cris/arch-v32/kernel/signal.c
index ce4ab1a5552c..b338d8fc0c12 100644
--- a/arch/cris/arch-v32/kernel/signal.c
+++ b/arch/cris/arch-v32/kernel/signal.c
@@ -59,19 +59,11 @@ void keep_debug_flags(unsigned long oldccs, unsigned long oldspc,
* dummy arguments to be able to reach the regs argument.
*/
int
-sys_sigsuspend(old_sigset_t mask, long r11, long r12, long r13, long mof,
- long srp, struct pt_regs *regs)
+sys_sigsuspend(old_sigset_t mask)
{
- mask &= _BLOCKABLE;
- spin_lock_irq(&current->sighand->siglock);
- current->saved_sigmask = current->blocked;
- siginitset(&current->blocked, mask);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_thread_flag(TIF_RESTORE_SIGMASK);
- return -ERESTARTNOHAND;
+ sigset_t blocked;
+ siginitset(&blocked, mask);
+ return sigsuspend(&blocked);
}
int
@@ -87,11 +79,11 @@ sys_sigaction(int signal, const struct old_sigaction *act,
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(newk.sa.sa_handler, &act->sa_handler) ||
- __get_user(newk.sa.sa_restorer, &act->sa_restorer))
+ __get_user(newk.sa.sa_restorer, &act->sa_restorer) ||
+ __get_user(newk.sa.sa_flags, &act->sa_flags) ||
+ __get_user(mask, &act->sa_mask))
return -EFAULT;
- __get_user(newk.sa.sa_flags, &act->sa_flags);
- __get_user(mask, &act->sa_mask);
siginitset(&newk.sa.sa_mask, mask);
}
@@ -100,11 +92,11 @@ sys_sigaction(int signal, const struct old_sigaction *act,
if (!retval && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(oldk.sa.sa_handler, &oact->sa_handler) ||
- __put_user(oldk.sa.sa_restorer, &oact->sa_restorer))
+ __put_user(oldk.sa.sa_restorer, &oact->sa_restorer) ||
+ __put_user(oldk.sa.sa_flags, &oact->sa_flags) ||
+ __put_user(oldk.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
- __put_user(oldk.sa.sa_flags, &oact->sa_flags);
- __put_user(oldk.sa.sa_mask.sig[0], &oact->sa_mask);
}
return retval;
@@ -176,12 +168,7 @@ sys_sigreturn(long r10, long r11, long r12, long r13, long mof, long srp,
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
-
- current->blocked = set;
-
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->sc))
goto badframe;
@@ -222,12 +209,7 @@ sys_rt_sigreturn(long r10, long r11, long r12, long r13, long mof, long srp,
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
-
- current->blocked = set;
-
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
goto badframe;
@@ -363,10 +345,7 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
return 0;
give_sigsegv:
- if (sig == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
-
- force_sig(SIGSEGV, current);
+ force_sigsegv(sig, current);
return -EFAULT;
}
@@ -450,10 +429,7 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
return 0;
give_sigsegv:
- if (sig == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
-
- force_sig(SIGSEGV, current);
+ force_sigsegv(sig, current);
return -EFAULT;
}
@@ -512,18 +488,8 @@ handle_signal(int canrestart, unsigned long sig,
else
ret = setup_frame(sig, ka, oldset, regs);
- if (ka->sa.sa_flags & SA_ONESHOT)
- ka->sa.sa_handler = SIG_DFL;
-
- if (ret == 0) {
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked, &current->blocked,
- &ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked, sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
- }
+ if (ret == 0)
+ block_sigmask(ka, sig);
return ret;
}
diff --git a/arch/frv/kernel/signal.c b/arch/frv/kernel/signal.c
index bab01298b58e..8cf5dca01758 100644
--- a/arch/frv/kernel/signal.c
+++ b/arch/frv/kernel/signal.c
@@ -40,17 +40,9 @@ struct fdpic_func_descriptor {
*/
asmlinkage int sys_sigsuspend(int history0, int history1, old_sigset_t mask)
{
- mask &= _BLOCKABLE;
- spin_lock_irq(&current->sighand->siglock);
- current->saved_sigmask = current->blocked;
- siginitset(&current->blocked, mask);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_thread_flag(TIF_RESTORE_SIGMASK);
- return -ERESTARTNOHAND;
+ sigset_t blocked;
+ siginitset(&blocked, mask);
+ return sigsuspend(&blocked);
}
asmlinkage int sys_sigaction(int sig,
@@ -64,10 +56,10 @@ asmlinkage int sys_sigaction(int sig,
old_sigset_t mask;
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
- __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
+ __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
+ __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
+ __get_user(mask, &act->sa_mask))
return -EFAULT;
- __get_user(new_ka.sa.sa_flags, &act->sa_flags);
- __get_user(mask, &act->sa_mask);
siginitset(&new_ka.sa.sa_mask, mask);
}
@@ -76,10 +68,10 @@ asmlinkage int sys_sigaction(int sig,
if (!ret && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
- __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
+ __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
+ __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
+ __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
- __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
- __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
}
return ret;
@@ -158,10 +150,7 @@ asmlinkage int sys_sigreturn(void)
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(&frame->sc, &gr8))
goto badframe;
@@ -184,10 +173,7 @@ asmlinkage int sys_rt_sigreturn(void)
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(&frame->uc.uc_mcontext, &gr8))
goto badframe;
@@ -474,15 +460,8 @@ static int handle_signal(unsigned long sig, siginfo_t *info,
else
ret = setup_frame(sig, ka, oldset);
- if (ret == 0) {
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked, &current->blocked,
- &ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked, sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
- }
+ if (ret == 0)
+ block_sigmask(ka, sig);
return ret;
diff --git a/arch/h8300/include/asm/unistd.h b/arch/h8300/include/asm/unistd.h
index 2c3f8e60b1e0..718511303b4e 100644
--- a/arch/h8300/include/asm/unistd.h
+++ b/arch/h8300/include/asm/unistd.h
@@ -356,6 +356,7 @@
#define __ARCH_WANT_SYS_SIGPENDING
#define __ARCH_WANT_SYS_SIGPROCMASK
#define __ARCH_WANT_SYS_RT_SIGACTION
+#define __ARCH_WANT_SYS_RT_SIGSUSPEND
/*
* "Conditional" syscalls
diff --git a/arch/h8300/kernel/signal.c b/arch/h8300/kernel/signal.c
index af842c369d24..d4b0555d2904 100644
--- a/arch/h8300/kernel/signal.c
+++ b/arch/h8300/kernel/signal.c
@@ -49,60 +49,15 @@
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset);
-
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
-asmlinkage int do_sigsuspend(struct pt_regs *regs)
-{
- old_sigset_t mask = regs->er3;
- sigset_t saveset;
-
- mask &= _BLOCKABLE;
- spin_lock_irq(&current->sighand->siglock);
- saveset = current->blocked;
- siginitset(&current->blocked, mask);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
- regs->er0 = -EINTR;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- if (do_signal(regs, &saveset))
- return -EINTR;
- }
-}
-
asmlinkage int
-do_rt_sigsuspend(struct pt_regs *regs)
+sys_sigsuspend(int unused1, int unused2, old_sigset_t mask)
{
- sigset_t *unewset = (sigset_t *)regs->er1;
- size_t sigsetsize = (size_t)regs->er2;
- 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);
-
- spin_lock_irq(&current->sighand->siglock);
- saveset = current->blocked;
- current->blocked = newset;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
- regs->er0 = -EINTR;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- if (do_signal(regs, &saveset))
- return -EINTR;
- }
+ sigset_t blocked;
+ siginitset(&blocked, mask);
+ return sigsuspend(&blocked);
}
asmlinkage int
@@ -116,10 +71,10 @@ sys_sigaction(int sig, const struct old_sigaction *act,
old_sigset_t mask;
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
- __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
+ __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
+ __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
+ __get_user(mask, &act->sa_mask))
return -EFAULT;
- __get_user(new_ka.sa.sa_flags, &act->sa_flags);
- __get_user(mask, &act->sa_mask);
siginitset(&new_ka.sa.sa_mask, mask);
}
@@ -128,10 +83,10 @@ sys_sigaction(int sig, const struct old_sigaction *act,
if (!ret && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
- __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
+ __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
+ __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
+ __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
- __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
- __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
}
return ret;
@@ -232,10 +187,7 @@ asmlinkage int do_sigreturn(unsigned long __unused,...)
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->sc, &er0))
goto badframe;
@@ -260,10 +212,7 @@ asmlinkage int do_rt_sigreturn(unsigned long __unused,...)
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_unlock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_lock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &er0))
goto badframe;
@@ -314,7 +263,7 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
return (void *)((usp - frame_size) & -8UL);
}
-static void setup_frame (int sig, struct k_sigaction *ka,
+static int setup_frame (int sig, struct k_sigaction *ka,
sigset_t *set, struct pt_regs *regs)
{
struct sigframe *frame;
@@ -375,13 +324,14 @@ static void setup_frame (int sig, struct k_sigaction *ka,
regs->er1 = (unsigned long)&(frame->sc);
regs->er5 = current->mm->start_data; /* GOT base */
- return;
+ return 0;
give_sigsegv:
force_sigsegv(sig, current);
+ return -EFAULT;
}
-static void setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
+static int setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs *regs)
{
struct rt_sigframe *frame;
@@ -450,10 +400,11 @@ static void setup_rt_frame (int sig, struct k_sigaction *ka, siginfo_t *info,
regs->er2 = (unsigned long)&frame->uc;
regs->er5 = current->mm->start_data; /* GOT base */
- return;
+ return 0;
give_sigsegv:
force_sigsegv(sig, current);
+ return -EFAULT;
}
/*
@@ -463,6 +414,7 @@ static void
handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
sigset_t *oldset, struct pt_regs * regs)
{
+ int ret;
/* are we from a system call? */
if (regs->orig_er0 >= 0) {
switch (regs->er0) {
@@ -485,16 +437,14 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
/* set up the stack frame */
if (ka->sa.sa_flags & SA_SIGINFO)
- setup_rt_frame(sig, ka, info, oldset, regs);
+ ret = setup_rt_frame(sig, ka, info, oldset, regs);
else
- setup_frame(sig, ka, oldset, regs);
-
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked,sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ ret = setup_frame(sig, ka, oldset, regs);
+
+ if (!ret) {
+ block_sigmask(ka, sig);
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+ }
}
/*
@@ -502,11 +452,12 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
* want to handle. Thus you cannot kill init even with a SIGKILL even by
* mistake.
*/
-asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset)
+statis 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
@@ -515,21 +466,23 @@ asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset)
* if so.
*/
if ((regs->ccr & 0x10))
- return 1;
+ return;
if (try_to_freeze())
goto no_signal;
current->thread.esp0 = (unsigned long) regs;
- 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, &info, &ka, oldset, regs);
- return 1;
+ return;
}
no_signal:
/* Did we come from a system call? */
@@ -546,13 +499,16 @@ asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset)
regs->pc -= 2;
}
}
- return 0;
+
+ /* 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);
}
asmlinkage void do_notify_resume(struct pt_regs *regs, u32 thread_info_flags)
{
- if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
- do_signal(regs, NULL);
+ if (thread_info_flags & _TIF_SIGPENDING)
+ do_signal(regs);
if (thread_info_flags & _TIF_NOTIFY_RESUME) {
clear_thread_flag(TIF_NOTIFY_RESUME);
diff --git a/arch/h8300/kernel/syscalls.S b/arch/h8300/kernel/syscalls.S
index 4be2ea2fbe26..9d77e715a2ed 100644
--- a/arch/h8300/kernel/syscalls.S
+++ b/arch/h8300/kernel/syscalls.S
@@ -343,12 +343,6 @@ SYMBOL_NAME_LABEL(sys_call_table)
SYMBOL_NAME_LABEL(sys_clone)
call_sp h8300_clone
-SYMBOL_NAME_LABEL(sys_sigsuspend)
- call_sp do_sigsuspend
-
-SYMBOL_NAME_LABEL(sys_rt_sigsuspend)
- call_sp do_rt_sigsuspend
-
SYMBOL_NAME_LABEL(sys_sigreturn)
call_sp do_sigreturn
diff --git a/arch/hexagon/kernel/signal.c b/arch/hexagon/kernel/signal.c
index ecbab3457606..434866eb0f1c 100644
--- a/arch/hexagon/kernel/signal.c
+++ b/arch/hexagon/kernel/signal.c
@@ -272,6 +272,7 @@ void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags)
if (thread_info_flags & _TIF_NOTIFY_RESUME) {
clear_thread_flag(TIF_NOTIFY_RESUME);
+ tracehook_notify_resume(regs);
if (current->replacement_session_keyring)
key_replace_session_keyring();
}
@@ -293,6 +294,9 @@ asmlinkage int sys_rt_sigreturn(void)
struct rt_sigframe __user *frame;
sigset_t blocked;
+ /* Always make any pending restarted system calls return -EINTR */
+ current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
frame = (struct rt_sigframe __user *)pt_psp(regs);
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
diff --git a/arch/ia64/kernel/signal.c b/arch/ia64/kernel/signal.c
index 7bdafc8788bd..7523501d3bc0 100644
--- a/arch/ia64/kernel/signal.c
+++ b/arch/ia64/kernel/signal.c
@@ -201,13 +201,7 @@ ia64_rt_sigreturn (struct sigscratch *scr)
goto give_sigsegv;
sigdelsetmask(&set, ~_BLOCKABLE);
-
- spin_lock_irq(&current->sighand->siglock);
- {
- current->blocked = set;
- recalc_sigpending();
- }
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(sc, scr))
goto give_sigsegv;
@@ -427,12 +421,7 @@ handle_signal (unsigned long sig, struct k_sigaction *ka, siginfo_t *info, sigse
if (!setup_frame(sig, ka, info, oldset, scr))
return 0;
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked, &current->blocked, &ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked, sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ block_sigmask(ka, sig);
/*
* Let tracing know that we've done the handler setup.
diff --git a/arch/m32r/include/asm/signal.h b/arch/m32r/include/asm/signal.h
index b2eeb0de1c8d..ea5f95e4079e 100644
--- a/arch/m32r/include/asm/signal.h
+++ b/arch/m32r/include/asm/signal.h
@@ -110,13 +110,6 @@ typedef unsigned long sigset_t;
#include <asm-generic/signal-defs.h>
#ifdef __KERNEL__
-struct old_sigaction {
- __sighandler_t sa_handler;
- old_sigset_t sa_mask;
- unsigned long sa_flags;
- __sigrestore_t sa_restorer;
-};
-
struct sigaction {
__sighandler_t sa_handler;
unsigned long sa_flags;
diff --git a/arch/m32r/kernel/signal.c b/arch/m32r/kernel/signal.c
index a08697f0886d..f54d96993ea1 100644
--- a/arch/m32r/kernel/signal.c
+++ b/arch/m32r/kernel/signal.c
@@ -112,10 +112,7 @@ sys_rt_sigreturn(unsigned long r0, unsigned long r1,
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &result))
goto badframe;
@@ -300,12 +297,7 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info,
if (setup_rt_frame(sig, ka, info, oldset, regs))
return -EFAULT;
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked,sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ block_sigmask(ka, sig);
return 0;
}
diff --git a/arch/m68k/include/asm/thread_info.h b/arch/m68k/include/asm/thread_info.h
index e8665e6f9464..126131f94a2c 100644
--- a/arch/m68k/include/asm/thread_info.h
+++ b/arch/m68k/include/asm/thread_info.h
@@ -71,6 +71,7 @@ static inline struct thread_info *current_thread_info(void)
* bits 0-7 are tested at every exception exit
* bits 8-15 are also tested at syscall exit
*/
+#define TIF_NOTIFY_RESUME 5 /* callback before returning to user */
#define TIF_SIGPENDING 6 /* signal pending */
#define TIF_NEED_RESCHED 7 /* rescheduling necessary */
#define TIF_DELAYED_TRACE 14 /* single step a syscall */
diff --git a/arch/m68k/kernel/entry_mm.S b/arch/m68k/kernel/entry_mm.S
index 675a854966a6..f29e73ca9dbb 100644
--- a/arch/m68k/kernel/entry_mm.S
+++ b/arch/m68k/kernel/entry_mm.S
@@ -148,7 +148,7 @@ syscall_exit_work:
jcs do_trace_exit
jmi do_delayed_trace
lslw #8,%d0
- jmi do_signal_return
+ jne do_signal_return
pea resume_userspace
jra schedule
@@ -172,7 +172,7 @@ exit_work:
| save top of frame
movel %sp,%curptr@(TASK_THREAD+THREAD_ESP0)
lslb #1,%d0
- jmi do_signal_return
+ jne do_signal_return
pea resume_userspace
jra schedule
@@ -182,7 +182,7 @@ do_signal_return:
subql #4,%sp | dummy return address
SAVE_SWITCH_STACK
pea %sp@(SWITCH_STACK_SIZE)
- bsrl do_signal
+ bsrl do_notify_resume
addql #4,%sp
RESTORE_SWITCH_STACK
addql #4,%sp
diff --git a/arch/m68k/kernel/signal.c b/arch/m68k/kernel/signal.c
index 1747c7030a33..d9f3d1900eed 100644
--- a/arch/m68k/kernel/signal.c
+++ b/arch/m68k/kernel/signal.c
@@ -43,6 +43,7 @@
#include <linux/tty.h>
#include <linux/binfmts.h>
#include <linux/module.h>
+#include <linux/tracehook.h>
#include <asm/setup.h>
#include <asm/uaccess.h>
@@ -230,18 +231,9 @@ static inline void push_cache(unsigned long vaddr)
asmlinkage int
sys_sigsuspend(int unused0, int unused1, old_sigset_t mask)
{
- mask &= _BLOCKABLE;
- spin_lock_irq(&current->sighand->siglock);
- current->saved_sigmask = current->blocked;
- siginitset(&current->blocked, mask);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_restore_sigmask();
-
- return -ERESTARTNOHAND;
+ sigset_t blocked;
+ siginitset(&blocked, mask);
+ return sigsuspend(&blocked);
}
asmlinkage int
@@ -804,8 +796,7 @@ asmlinkage int do_sigreturn(unsigned long __unused)
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- current->blocked = set;
- recalc_sigpending();
+ set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->sc, frame + 1))
goto badframe;
@@ -830,8 +821,7 @@ asmlinkage int do_rt_sigreturn(unsigned long __unused)
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- current->blocked = set;
- recalc_sigpending();
+ set_current_blocked(&set);
if (rt_restore_ucontext(regs, sw, &frame->uc))
goto badframe;
@@ -1150,10 +1140,7 @@ handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info,
if (err)
return;
- sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked,sig);
- recalc_sigpending();
+ block_sigmask(ka, sig);
if (test_thread_flag(TIF_DELAYED_TRACE)) {
regs->sr &= ~0x8000;
@@ -1168,7 +1155,7 @@ 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 void do_signal(struct pt_regs *regs)
+static void do_signal(struct pt_regs *regs)
{
siginfo_t info;
struct k_sigaction ka;
@@ -1200,3 +1187,15 @@ asmlinkage void do_signal(struct pt_regs *regs)
sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
}
}
+
+void do_notify_resume(struct pt_regs *regs)
+{
+ if (test_thread_flag(TIF_SIGPENDING))
+ do_signal(regs);
+
+ if (test_and_clear_thread_flag(TIF_NOTIFY_RESUME)) {
+ tracehook_notify_resume(regs);
+ if (current->replacement_session_keyring)
+ key_replace_session_keyring();
+ }
+}
diff --git a/arch/m68k/platform/68328/entry.S b/arch/m68k/platform/68328/entry.S
index 5c39b80ed7de..7f91c2fde509 100644
--- a/arch/m68k/platform/68328/entry.S
+++ b/arch/m68k/platform/68328/entry.S
@@ -119,7 +119,7 @@ Lsignal_return:
subql #4,%sp /* dummy return address*/
SAVE_SWITCH_STACK
pea %sp@(SWITCH_STACK_SIZE)
- bsrw do_signal
+ bsrw do_notify_resume
addql #4,%sp
RESTORE_SWITCH_STACK
addql #4,%sp
diff --git a/arch/m68k/platform/68360/entry.S b/arch/m68k/platform/68360/entry.S
index aa47d1d49929..904fd9a4af4e 100644
--- a/arch/m68k/platform/68360/entry.S
+++ b/arch/m68k/platform/68360/entry.S
@@ -115,7 +115,7 @@ Lsignal_return:
subql #4,%sp /* dummy return address*/
SAVE_SWITCH_STACK
pea %sp@(SWITCH_STACK_SIZE)
- bsrw do_signal
+ bsrw do_notify_resume
addql #4,%sp
RESTORE_SWITCH_STACK
addql #4,%sp
diff --git a/arch/m68k/platform/coldfire/entry.S b/arch/m68k/platform/coldfire/entry.S
index 281e38c2b6c7..881ab8e379d4 100644
--- a/arch/m68k/platform/coldfire/entry.S
+++ b/arch/m68k/platform/coldfire/entry.S
@@ -152,7 +152,7 @@ Lsignal_return:
subql #4,%sp /* dummy return address */
SAVE_SWITCH_STACK
pea %sp@(SWITCH_STACK_SIZE)
- jsr do_signal
+ jsr do_notify_resume
addql #4,%sp
RESTORE_SWITCH_STACK
addql #4,%sp
diff --git a/arch/microblaze/kernel/entry-nommu.S b/arch/microblaze/kernel/entry-nommu.S
index 34b526f59b43..75c3ea1f48a1 100644
--- a/arch/microblaze/kernel/entry-nommu.S
+++ b/arch/microblaze/kernel/entry-nommu.S
@@ -132,11 +132,10 @@ ret_from_intr:
beqi r11, 1f
bralid r15, schedule
nop
-1: andi r11, r19, _TIF_SIGPENDING
+1: andi r11, r19, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME
beqid r11, no_intr_resched
addk r5, r1, r0
- addk r7, r0, r0
- bralid r15, do_signal
+ bralid r15, do_notify_resume
addk r6, r0, r0
no_intr_resched:
@@ -292,8 +291,8 @@ ENTRY(_user_exception)
/*
* Debug traps are like a system call, but entered via brki r14, 0x60
- * All we need to do is send the SIGTRAP signal to current, ptrace and do_signal
- * will handle the rest
+ * All we need to do is send the SIGTRAP signal to current, ptrace and
+ * do_notify_resume will handle the rest
*/
ENTRY(_debug_exception)
swi r1, r0, PER_CPU(ENTRY_SP) /* save the current sp */
@@ -482,12 +481,11 @@ work_pending:
beqi r11, 1f
bralid r15, schedule
nop
-1: andi r11, r19, _TIF_SIGPENDING
+1: andi r11, r19, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME
beqi r11, no_work_pending
addk r5, r1, r0
- addik r7, r0, 1
- bralid r15, do_signal
- addk r6, r0, r0
+ bralid r15, do_notify_resume
+ addik r6, r0, 1
bri no_work_pending
ENTRY(ret_to_user)
@@ -569,10 +567,6 @@ sys_rt_sigreturn_wrapper:
brid sys_rt_sigreturn
addk r5, r1, r0
-sys_rt_sigsuspend_wrapper:
- brid sys_rt_sigsuspend
- addk r7, r1, r0
-
/* Interrupt vector table */
.section .init.ivt, "ax"
.org 0x0
diff --git a/arch/microblaze/kernel/entry.S b/arch/microblaze/kernel/entry.S
index 66e34a3bfe1b..daff9e5e4a1f 100644
--- a/arch/microblaze/kernel/entry.S
+++ b/arch/microblaze/kernel/entry.S
@@ -430,13 +430,12 @@ C_ENTRY(ret_from_trap):
5: /* get thread info from current task*/
lwi r11, CURRENT_TASK, TS_THREAD_INFO;
lwi r11, r11, TI_FLAGS; /* get flags in thread info */
- andi r11, r11, _TIF_SIGPENDING;
+ andi r11, r11, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
beqi r11, 1f; /* Signals to handle, handle them */
addik r5, r1, 0; /* Arg 1: struct pt_regs *regs */
- addi r7, r0, 1; /* Arg 3: int in_syscall */
- bralid r15, do_signal; /* Handle any signals */
- add r6, r0, r0; /* Arg 2: sigset_t *oldset */
+ bralid r15, do_notify_resume; /* Handle any signals */
+ addi r6, r0, 1; /* Arg 2: int in_syscall */
/* Finally, return to user state. */
1: set_bip; /* Ints masked for state restore */
@@ -622,7 +621,7 @@ C_ENTRY(ret_from_exc):
/* Maybe handle a signal */
5: lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */
lwi r11, r11, TI_FLAGS; /* get flags in thread info */
- andi r11, r11, _TIF_SIGPENDING;
+ andi r11, r11, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
beqi r11, 1f; /* Signals to handle, handle them */
/*
@@ -635,11 +634,10 @@ C_ENTRY(ret_from_exc):
* traps), but signal handlers may want to examine or change the
* complete register state. Here we save anything not saved by
* the normal entry sequence, so that it may be safely restored
- * (in a possibly modified form) after do_signal returns. */
+ * (in a possibly modified form) after do_notify_resume returns. */
addik r5, r1, 0; /* Arg 1: struct pt_regs *regs */
- addi r7, r0, 0; /* Arg 3: int in_syscall */
- bralid r15, do_signal; /* Handle any signals */
- add r6, r0, r0; /* Arg 2: sigset_t *oldset */
+ bralid r15, do_notify_resume; /* Handle any signals */
+ addi r6, r0, 0; /* Arg 2: int in_syscall */
/* Finally, return to user state. */
1: set_bip; /* Ints masked for state restore */
@@ -732,13 +730,12 @@ ret_from_irq:
/* Maybe handle a signal */
5: lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* MS: get thread info */
lwi r11, r11, TI_FLAGS; /* get flags in thread info */
- andi r11, r11, _TIF_SIGPENDING;
+ andi r11, r11, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
beqid r11, no_intr_resched
/* Handle a signal return; Pending signals should be in r18. */
- addi r7, r0, 0; /* Arg 3: int in_syscall */
addik r5, r1, 0; /* Arg 1: struct pt_regs *regs */
- bralid r15, do_signal; /* Handle any signals */
- add r6, r0, r0; /* Arg 2: sigset_t *oldset */
+ bralid r15, do_notify_resume; /* Handle any signals */
+ addi r6, r0, 0; /* Arg 2: int in_syscall */
/* Finally, return to user state. */
no_intr_resched:
@@ -869,13 +866,12 @@ dbtrap_call: /* Return point for kernel/user entry + 8 because of rtsd r15, 8 */
/* Maybe handle a signal */
5: lwi r11, CURRENT_TASK, TS_THREAD_INFO; /* get thread info */
lwi r11, r11, TI_FLAGS; /* get flags in thread info */
- andi r11, r11, _TIF_SIGPENDING;
+ andi r11, r11, _TIF_SIGPENDING | _TIF_NOTIFY_RESUME;
beqi r11, 1f; /* Signals to handle, handle them */
addik r5, r1, 0; /* Arg 1: struct pt_regs *regs */
- addi r7, r0, 0; /* Arg 3: int in_syscall */
- bralid r15, do_signal; /* Handle any signals */
- add r6, r0, r0; /* Arg 2: sigset_t *oldset */
+ bralid r15, do_notify_resume; /* Handle any signals */
+ addi r6, r0, 0; /* Arg 2: int in_syscall */
/* Finally, return to user state. */
1: swi CURRENT_TASK, r0, PER_CPU(CURRENT_SAVE); /* save current */
diff --git a/arch/microblaze/kernel/signal.c b/arch/microblaze/kernel/signal.c
index 599671168980..7f4c7bef1642 100644
--- a/arch/microblaze/kernel/signal.c
+++ b/arch/microblaze/kernel/signal.c
@@ -31,6 +31,7 @@
#include <linux/personality.h>
#include <linux/percpu.h>
#include <linux/linkage.h>
+#include <linux/tracehook.h>
#include <asm/entry.h>
#include <asm/ucontext.h>
#include <linux/uaccess.h>
@@ -42,8 +43,6 @@
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
-asmlinkage int do_signal(struct pt_regs *regs, sigset_t *oldset, int in_sycall);
-
asmlinkage long
sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
struct pt_regs *regs)
@@ -98,6 +97,9 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
sigset_t set;
int rval;
+ /* Always make any pending restarted system calls return -EINTR */
+ current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
@@ -105,10 +107,7 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &rval))
goto badframe;
@@ -169,7 +168,7 @@ get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
return (void __user *)((sp - frame_size) & -8UL);
}
-static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
+static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs *regs)
{
struct rt_sigframe __user *frame;
@@ -267,12 +266,11 @@ static void setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
current->comm, current->pid, frame, regs->pc);
#endif
- return;
+ return 0;
give_sigsegv:
- if (sig == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
- force_sig(SIGSEGV, current);
+ force_sigsegv(sig, current);
+ return -EFAULT;
}
/* Handle restarting system calls */
@@ -316,24 +314,20 @@ static int
handle_signal(unsigned long sig, struct k_sigaction *ka,
siginfo_t *info, sigset_t *oldset, struct pt_regs *regs)
{
+ int ret;
+
/* Set up the stack frame */
if (ka->sa.sa_flags & SA_SIGINFO)
- setup_rt_frame(sig, ka, info, oldset, regs);
+ ret = setup_rt_frame(sig, ka, info, oldset, regs);
else
- setup_rt_frame(sig, ka, NULL, oldset, regs);
-
- if (ka->sa.sa_flags & SA_ONESHOT)
- ka->sa.sa_handler = SIG_DFL;
-
- if (!(ka->sa.sa_flags & SA_NODEFER)) {
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked,
- &current->blocked, &ka->sa.sa_mask);
- sigaddset(&current->blocked, sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
- }
- return 1;
+ ret = setup_rt_frame(sig, ka, NULL, oldset, regs);
+
+ if (ret)
+ return ret;
+
+ block_sigmask(ka, sig);
+
+ return 0;
}
/*
@@ -345,24 +339,17 @@ handle_signal(unsigned long sig, struct k_sigaction *ka,
* 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, int in_syscall)
+static void do_signal(struct pt_regs *regs, int in_syscall)
{
siginfo_t info;
int signr;
struct k_sigaction ka;
+ sigset_t *oldset;
#ifdef DEBUG_SIG
- printk(KERN_INFO "do signal: %p %p %d\n", regs, oldset, in_syscall);
+ printk(KERN_INFO "do signal: %p %d\n", regs, in_syscall);
printk(KERN_INFO "do signal2: %lx %lx %ld [%lx]\n", regs->pc, regs->r1,
regs->r12, current_thread_info()->flags);
#endif
- /*
- * We want the common case to go fast, which
- * is why we may in certain cases get here from
- * kernel mode. Just return without doing anything
- * if so.
- */
- if (kernel_mode(regs))
- return 1;
if (current_thread_info()->status & TS_RESTORE_SIGMASK)
oldset = &current->saved_sigmask;
@@ -374,7 +361,7 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset, int in_syscall)
/* Whee! Actually deliver the signal. */
if (in_syscall)
handle_restart(regs, &ka, 1);
- if (handle_signal(signr, &ka, &info, oldset, regs)) {
+ if (!handle_signal(signr, &ka, &info, oldset, regs)) {
/*
* A signal was successfully delivered; the saved
* sigmask will have been stored in the signal frame,
@@ -384,7 +371,7 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset, int in_syscall)
current_thread_info()->status &=
~TS_RESTORE_SIGMASK;
}
- return 1;
+ return;
}
if (in_syscall)
@@ -398,7 +385,25 @@ int do_signal(struct pt_regs *regs, sigset_t *oldset, int in_syscall)
current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
}
+}
- /* Did we come from a system call? */
- return 0;
+void do_notify_resume(struct pt_regs *regs, int in_syscall)
+{
+ /*
+ * We want the common case to go fast, which
+ * is why we may in certain cases get here from
+ * kernel mode. Just return without doing anything
+ * if so.
+ */
+ if (kernel_mode(regs))
+ return;
+
+ if (test_thread_flag(TIF_SIGPENDING))
+ do_signal(regs, in_syscall);
+
+ if (test_and_clear_thread_flag(TIF_NOTIFY_RESUME)) {
+ tracehook_notify_resume(regs);
+ if (current->replacement_session_keyring)
+ key_replace_session_keyring();
+ }
}
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c
index d5a338a1739c..17f6ee30ad0d 100644
--- a/arch/mips/kernel/signal.c
+++ b/arch/mips/kernel/signal.c
@@ -255,15 +255,7 @@ asmlinkage int sys_sigsuspend(nabi_no_regargs struct pt_regs regs)
uset = (sigset_t __user *) regs.regs[4];
if (copy_from_user(&newset, uset, sizeof(sigset_t)))
return -EFAULT;
- sigdelsetmask(&newset, ~_BLOCKABLE);
-
- current->saved_sigmask = current->blocked;
- set_current_blocked(&newset);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_thread_flag(TIF_RESTORE_SIGMASK);
- return -ERESTARTNOHAND;
+ return sigsuspend(&newset);
}
#endif
@@ -281,15 +273,7 @@ asmlinkage int sys_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
unewset = (sigset_t __user *) regs.regs[4];
if (copy_from_user(&newset, unewset, sizeof(newset)))
return -EFAULT;
- sigdelsetmask(&newset, ~_BLOCKABLE);
-
- current->saved_sigmask = current->blocked;
- set_current_blocked(&newset);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_thread_flag(TIF_RESTORE_SIGMASK);
- return -ERESTARTNOHAND;
+ return sigsuspend(&newset);
}
#ifdef CONFIG_TRAD_SIGNALS
diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index ac3b8d89aae5..b4fe2eacbd5d 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -288,15 +288,7 @@ asmlinkage int sys32_sigsuspend(nabi_no_regargs struct pt_regs regs)
uset = (compat_sigset_t __user *) regs.regs[4];
if (get_sigset(&newset, uset))
return -EFAULT;
- sigdelsetmask(&newset, ~_BLOCKABLE);
-
- current->saved_sigmask = current->blocked;
- set_current_blocked(&newset);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_thread_flag(TIF_RESTORE_SIGMASK);
- return -ERESTARTNOHAND;
+ return sigsuspend(&newset);
}
asmlinkage int sys32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
@@ -313,15 +305,7 @@ asmlinkage int sys32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
uset = (compat_sigset_t __user *) regs.regs[4];
if (get_sigset(&newset, uset))
return -EFAULT;
- sigdelsetmask(&newset, ~_BLOCKABLE);
-
- current->saved_sigmask = current->blocked;
- set_current_blocked(&newset);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_thread_flag(TIF_RESTORE_SIGMASK);
- return -ERESTARTNOHAND;
+ return sigsuspend(&newset);
}
SYSCALL_DEFINE3(32_sigaction, long, sig, const struct sigaction32 __user *, act,
diff --git a/arch/mips/kernel/signal_n32.c b/arch/mips/kernel/signal_n32.c
index 86eb4b04631c..63ffac9af7c5 100644
--- a/arch/mips/kernel/signal_n32.c
+++ b/arch/mips/kernel/signal_n32.c
@@ -91,15 +91,7 @@ asmlinkage int sysn32_rt_sigsuspend(nabi_no_regargs struct pt_regs regs)
if (copy_from_user(&uset, unewset, sizeof(uset)))
return -EFAULT;
sigset_from_compat(&newset, &uset);
- sigdelsetmask(&newset, ~_BLOCKABLE);
-
- current->saved_sigmask = current->blocked;
- set_current_blocked(&newset);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_thread_flag(TIF_RESTORE_SIGMASK);
- return -ERESTARTNOHAND;
+ return sigsuspend(&newset);
}
asmlinkage void sysn32_rt_sigreturn(nabi_no_regargs struct pt_regs regs)
diff --git a/arch/mn10300/kernel/signal.c b/arch/mn10300/kernel/signal.c
index 690f4e9507d7..890cf91767cc 100644
--- a/arch/mn10300/kernel/signal.c
+++ b/arch/mn10300/kernel/signal.c
@@ -38,17 +38,9 @@
*/
asmlinkage long sys_sigsuspend(int history0, int history1, old_sigset_t mask)
{
- mask &= _BLOCKABLE;
- spin_lock_irq(&current->sighand->siglock);
- current->saved_sigmask = current->blocked;
- siginitset(&current->blocked, mask);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_thread_flag(TIF_RESTORE_SIGMASK);
- return -ERESTARTNOHAND;
+ sigset_t blocked;
+ siginitset(&blocked, mask);
+ return sigsuspend(&blocked);
}
/*
@@ -172,10 +164,7 @@ asmlinkage long sys_sigreturn(void)
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(current_frame(), &frame->sc, &d0))
goto badframe;
@@ -203,10 +192,7 @@ asmlinkage long sys_rt_sigreturn(void)
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
if (restore_sigcontext(current_frame(), &frame->uc.uc_mcontext, &d0))
goto badframe;
@@ -476,15 +462,8 @@ static int handle_signal(int sig,
else
ret = setup_frame(sig, ka, oldset, regs);
- if (ret == 0) {
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked, &current->blocked,
- &ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked, sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
- }
+ if (ret == 0)
+ block_sigmask(ka, sig);
return ret;
}
diff --git a/arch/parisc/kernel/signal.c b/arch/parisc/kernel/signal.c
index 12c1ed33dc18..4b9cb0d546d1 100644
--- a/arch/parisc/kernel/signal.c
+++ b/arch/parisc/kernel/signal.c
@@ -109,6 +109,7 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
sigframe_size = PARISC_RT_SIGFRAME_SIZE32;
#endif
+ current_thread_info()->restart_block.fn = do_no_restart_syscall;
/* Unwind the user stack to get the rt_sigframe structure. */
frame = (struct rt_sigframe __user *)
@@ -131,10 +132,7 @@ sys_rt_sigreturn(struct pt_regs *regs, int in_syscall)
}
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
/* Good thing we saved the old gr[30], eh? */
#ifdef CONFIG_64BIT
@@ -454,12 +452,7 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
if (!setup_rt_frame(sig, ka, info, oldset, regs, in_syscall))
return 0;
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked,sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ block_sigmask(ka, sig);
tracehook_signal_handler(sig, info, ka, regs,
test_thread_flag(TIF_SINGLESTEP) ||
@@ -474,8 +467,6 @@ syscall_restart(struct pt_regs *regs, struct k_sigaction *ka)
/* Check the return code */
switch (regs->gr[28]) {
case -ERESTART_RESTARTBLOCK:
- current_thread_info()->restart_block.fn =
- do_no_restart_syscall;
case -ERESTARTNOHAND:
DBG(1,"ERESTARTNOHAND: returning -EINTR\n");
regs->gr[28] = -EINTR;
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index 45eb998557f8..61f6aff25edc 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -204,10 +204,10 @@ static inline int get_old_sigaction(struct k_sigaction *new_ka,
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka->sa.sa_handler, &act->sa_handler) ||
- __get_user(new_ka->sa.sa_restorer, &act->sa_restorer))
+ __get_user(new_ka->sa.sa_restorer, &act->sa_restorer) ||
+ __get_user(new_ka->sa.sa_flags, &act->sa_flags) ||
+ __get_user(mask, &act->sa_mask))
return -EFAULT;
- __get_user(new_ka->sa.sa_flags, &act->sa_flags);
- __get_user(mask, &act->sa_mask);
siginitset(&new_ka->sa.sa_mask, mask);
return 0;
}
@@ -244,17 +244,8 @@ static inline int restore_general_regs(struct pt_regs *regs,
long sys_sigsuspend(old_sigset_t mask)
{
sigset_t blocked;
-
- current->saved_sigmask = current->blocked;
-
- mask &= _BLOCKABLE;
siginitset(&blocked, mask);
- set_current_blocked(&blocked);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_restore_sigmask();
- return -ERESTARTNOHAND;
+ return sigsuspend(&blocked);
}
long sys_sigaction(int sig, struct old_sigaction __user *act,
diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c
index 8a4e2b760d56..f626232e216c 100644
--- a/arch/s390/kernel/signal.c
+++ b/arch/s390/kernel/signal.c
@@ -59,15 +59,8 @@ typedef struct
SYSCALL_DEFINE3(sigsuspend, int, history0, int, history1, old_sigset_t, mask)
{
sigset_t blocked;
-
- current->saved_sigmask = current->blocked;
- mask &= _BLOCKABLE;
siginitset(&blocked, mask);
- set_current_blocked(&blocked);
- set_current_state(TASK_INTERRUPTIBLE);
- schedule();
- set_restore_sigmask();
- return -ERESTARTNOHAND;
+ return sigsuspend(&blocked);
}
SYSCALL_DEFINE3(sigaction, int, sig, const struct old_sigaction __user *, act,
diff --git a/arch/score/kernel/signal.c b/arch/score/kernel/signal.c
index aa57440e4973..d4a49011c48a 100644
--- a/arch/score/kernel/signal.c
+++ b/arch/score/kernel/signal.c
@@ -28,6 +28,7 @@
#include <linux/ptrace.h>
#include <linux/unistd.h>
#include <linux/uaccess.h>
+#include <linux/tracehook.h>
#include <asm/cacheflush.h>
#include <asm/syscalls.h>
@@ -152,6 +153,9 @@ score_rt_sigreturn(struct pt_regs *regs)
stack_t st;
int sig;
+ /* Always make any pending restarted system calls return -EINTR */
+ current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
frame = (struct rt_sigframe __user *) regs->regs[0];
if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
goto badframe;
@@ -159,10 +163,7 @@ score_rt_sigreturn(struct pt_regs *regs)
goto badframe;
sigdelsetmask(&set, ~_BLOCKABLE);
- spin_lock_irq(&current->sighand->siglock);
- current->blocked = set;
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ set_current_blocked(&set);
sig = restore_sigcontext(regs, &frame->rs_uc.uc_mcontext);
if (sig < 0)
@@ -236,9 +237,7 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
return 0;
give_sigsegv:
- if (signr == SIGSEGV)
- ka->sa.sa_handler = SIG_DFL;
- force_sig(SIGSEGV, current);
+ force_sigsegv(signr, current);
return -EFAULT;
}
@@ -272,12 +271,8 @@ static int handle_signal(unsigned long sig, siginfo_t *info,
*/
ret = setup_rt_frame(ka, regs, sig, oldset, info);
- spin_lock_irq(&current->sighand->siglock);
- sigorsets(&current->blocked, &current->blocked, &ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&current->blocked, sig);
- recalc_sigpending();
- spin_unlock_irq(&current->sighand->siglock);
+ if (ret == 0)
+ block_sigmask(ka, sig);
return ret;
}
@@ -356,6 +351,12 @@ asmlinkage void do_notify_resume(struct pt_regs *regs, void *unused,
__u32 thread_info_flags)
{
/* deal with pending signal delivery */
- if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
+ if (thread_info_flags & _TIF_SIGPENDING)
do_signal(regs);
+ if (thread_info_flags & _TIF_NOTIFY_RESUME) {
+ clear_thread_flag(TIF_NOTIFY_RESUME);
+ tracehook_notify_resume(regs);
+ if (current->replacement_session_keyring)
+ key_replace_session_keyring();
+ }
}
diff --git a/arch/sh/include/asm/syscalls_32.h b/arch/sh/include/asm/syscalls_32.h
index ae717e3c26d6..6c1fa559753c 100644
--- a/arch/sh/include/asm/syscalls_32.h
+++ b/arch/sh/include/asm/syscalls_32.h
@@ -23,9 +23,7 @@ asmlinkage int sys_execve(const char __user *ufilename,
const char __user *const __user *uargv,
const char __user *const __user *uenvp,
unsigned long r7, struct pt_regs __regs);
-asmlinkage int sys_sigsuspend(old_sigset_t mask, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs __regs);
+asmlinkage int sys_sigsuspend(old_sigset_t mask);
asmlinkage int sys_sigaction(int sig, const struct old_sigaction __user *act,
struct old_sigaction __user *oact);
asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
diff --git a/arch/sh/include/asm/unistd.h b/arch/sh/include/asm/unistd.h
index a42a5610a36a..e800a38c9f8d 100644
--- a/arch/sh/include/asm/unistd.h
+++ b/arch/sh/include/asm/unistd.h
@@ -1,13 +1,11 @@
#ifdef __KERNEL__
# ifdef CONFIG_SUPERH32
-
# include "unistd_32.h"
-# define __ARCH_WANT_SYS_RT_SIGSUSPEND
-
# else
# include "unistd_64.h"
# endif
+# define __ARCH_WANT_SYS_RT_SIGSUSPEND
# define __ARCH_WANT_IPC_PARSE_VERSION
# define __ARCH_WANT_OLD_READDIR
# define __ARCH_WANT_OLD_STAT
diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c
index 5901fba3176e..cb4172c8af7d 100644
--- a/arch/sh/kernel/signal_32.c
+++ b/arch/sh/kernel/signal_32.c
@@ -53,23 +53,11 @@ struct fdpic_func_descriptor {
* Atomically swap in the new signal mask, and wait for a signal.
*/
asmlinkage int
-sys_sigsuspend(old_sigset_t mask,
- unsigned long r5, unsigned long r6, unsigned long r7,
- struct pt_regs __regs)
+sys_sigsuspend(old_sigset_t mask)
{
sigset_t blocked;
-
- current->saved_sigmask = current->blocked;
-
- mask &= _BLOCKABLE;
siginitset(&blocked, mask);
- set_current_blocked(&blocked);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_restore_sigmask();
-
- return -ERESTARTNOHAND;
+ return sigsuspend(&blocked);
}
asmlinkage int
@@ -83,10 +71,10 @@ sys_sigaction(int sig, const struct old_sigaction __user *act,
old_sigset_t mask;
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
- __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
+ __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
+ __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
+ __get_user(mask, &act->sa_mask))
return -EFAULT;
- __get_user(new_ka.sa.sa_flags, &act->sa_flags);
- __get_user(mask, &act->sa_mask);
siginitset(&new_ka.sa.sa_mask, mask);
}
@@ -95,10 +83,10 @@ sys_sigaction(int sig, const struct old_sigaction __user *act,
if (!ret && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
- __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
+ __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
+ __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
+ __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
- __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
- __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
}
return ret;
@@ -162,12 +150,11 @@ static inline int save_sigcontext_fpu(struct sigcontext __user *sc,
if (!(boot_cpu_data.flags & CPU_HAS_FPU))
return 0;
- if (!used_math()) {
- __put_user(0, &sc->sc_ownedfp);
- return 0;
- }
+ if (!used_math())
+ return __put_user(0, &sc->sc_ownedfp);
- __put_user(1, &sc->sc_ownedfp);
+ if (__put_user(1, &sc->sc_ownedfp))
+ return -EFAULT;
/* This will cause a "finit" to be triggered by the next
attempted FPU operation by the 'current' process.
@@ -207,7 +194,7 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *sc, int *r0_p
regs->sr |= SR_FD; /* Release FPU */
clear_fpu(tsk, regs);
clear_used_math();
- __get_user (owned_fp, &sc->sc_ownedfp);
+ err |= __get_user (owned_fp, &sc->sc_ownedfp);
if (owned_fp)
err |= restore_sigcontext_fpu(sc);
}
@@ -398,11 +385,14 @@ static int setup_frame(int sig, struct k_sigaction *ka,
struct fdpic_func_descriptor __user *funcptr =
(struct fdpic_func_descriptor __user *)ka->sa.sa_handler;
- __get_user(regs->pc, &funcptr->text);
- __get_user(regs->regs[12], &funcptr->GOT);
+ err |= __get_user(regs->pc, &funcptr->text);
+ err |= __get_user(regs->regs[12], &funcptr->GOT);
} else
regs->pc = (unsigned long)ka->sa.sa_handler;
+ if (err)
+ goto give_sigsegv;
+
set_fs(USER_DS);
pr_debug("SIG deliver (%s:%d): sp=%p pc=%08lx pr=%08lx\n",
@@ -482,11 +472,14 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
struct fdpic_func_descriptor __user *funcptr =
(struct fdpic_func_descriptor __user *)ka->sa.sa_handler;
- __get_user(regs->pc, &funcptr->text);
- __get_user(regs->regs[12], &funcptr->GOT);
+ err |= __get_user(regs->pc, &funcptr->text);
+ err |= __get_user(regs->regs[12], &funcptr->GOT);
} else
regs->pc = (unsigned long)ka->sa.sa_handler;
+ if (err)
+ goto give_sigsegv;
+
set_fs(USER_DS);
pr_debug("SIG deliver (%s:%d): sp=%p pc=%08lx pr=%08lx\n",
diff --git a/arch/sh/kernel/signal_64.c b/arch/sh/kernel/signal_64.c
index 3c9a6f7dcdce..b589a354c069 100644
--- a/arch/sh/kernel/signal_64.c
+++ b/arch/sh/kernel/signal_64.c
@@ -83,11 +83,12 @@ handle_syscall_restart(struct pt_regs *regs, struct sigaction *sa)
* the kernel can handle, and then we build all the user-level signal handling
* stack-frames in one go after that.
*/
-static int do_signal(struct pt_regs *regs, sigset_t *oldset)
+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
@@ -96,11 +97,11 @@ static int do_signal(struct pt_regs *regs, sigset_t *oldset)
* if so.
*/
if (!user_mode(regs))
- return 1;
+ return;
if (current_thread_info()->status & TS_RESTORE_SIGMASK)
oldset = &current->saved_sigmask;
- else if (!oldset)
+ else
oldset = &current->blocked;
signr = get_signal_to_deliver(&info, &ka, regs, 0);
@@ -118,7 +119,7 @@ static int do_signal(struct pt_regs *regs, sigset_t *oldset)
tracehook_signal_handler(signr, &info, &ka, regs,
test_thread_flag(TIF_SINGLESTEP));
- return 1;
+ return;
}
}
@@ -147,71 +148,18 @@ static int do_signal(struct pt_regs *regs, sigset_t *oldset)
sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
}
- return 0;
+ return;
}
/*
* Atomically swap in the new signal mask, and wait for a signal.
*/
asmlinkage int
-sys_sigsuspend(old_sigset_t mask,
- unsigned long r3, unsigned long r4, unsigned long r5,
- unsigned long r6, unsigned long r7,
- struct pt_regs * regs)
+sys_sigsuspend(old_sigset_t mask)
{
- sigset_t saveset, blocked;
-
- saveset = current->blocked;
-
- mask &= _BLOCKABLE;
+ sigset_t blocked;
siginitset(&blocked, mask);
- set_current_blocked(&blocked);
-
- REF_REG_RET = -EINTR;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_restore_sigmask();
- regs->pc += 4; /* because sys_sigreturn decrements the pc */
- if (do_signal(regs, &saveset)) {
- /* pc now points at signal handler. Need to decrement
- it because entry.S will increment it. */
- regs->pc -= 4;
- return -EINTR;
- }
- }
-}
-
-asmlinkage int
-sys_rt_sigsuspend(sigset_t *unewset, size_t sigsetsize,
- unsigned long r4, unsigned long r5, unsigned long r6,
- unsigned long r7,
- 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);
-
- REF_REG_RET = -EINTR;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- regs->pc += 4; /* because sys_sigreturn decrements the pc */
- if (do_signal(regs, &saveset)) {
- /* pc now points at signal handler. Need to decrement
- it because entry.S will increment it. */
- regs->pc -= 4;
- return -EINTR;
- }
- }
+ return sigsuspend(&blocked);
}
asmlinkage int
@@ -225,10 +173,10 @@ sys_sigaction(int sig, const struct old_sigaction __user *act,
old_sigset_t mask;
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
- __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
+ __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
+ __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
+ __get_user(mask, &act->sa_mask))
return -EFAULT;
- __get_user(new_ka.sa.sa_flags, &act->sa_flags);
- __get_user(mask, &act->sa_mask);
siginitset(&new_ka.sa.sa_mask, mask);
}
@@ -237,10 +185,10 @@ sys_sigaction(int sig, const struct old_sigaction __user *act,
if (!ret && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
- __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
+ __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
+ __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
+ __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
- __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
- __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
}
return ret;
@@ -732,7 +680,7 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
asmlinkage void do_notify_resume(struct pt_regs *regs, unsigned long thread_info_flags)
{
if (thread_info_flags & _TIF_SIGPENDING)
- do_signal(regs, 0);
+ do_signal(regs);
if (thread_info_flags & _TIF_NOTIFY_RESUME) {
clear_thread_flag(TIF_NOTIFY_RESUME);
diff --git a/arch/sparc/kernel/signal32.c b/arch/sparc/kernel/signal32.c
index 948700fb9036..bb1513e45f1a 100644
--- a/arch/sparc/kernel/signal32.c
+++ b/arch/sparc/kernel/signal32.c
@@ -215,8 +215,9 @@ void do_sigreturn32(struct pt_regs *regs)
(((unsigned long) sf) & 3))
goto segv;
- get_user(pc, &sf->info.si_regs.pc);
- __get_user(npc, &sf->info.si_regs.npc);
+ if (get_user(pc, &sf->info.si_regs.pc) ||
+ __get_user(npc, &sf->info.si_regs.npc))
+ goto segv;
if ((pc | npc) & 3)
goto segv;
@@ -305,8 +306,9 @@ asmlinkage void do_rt_sigreturn32(struct pt_regs *regs)
(((unsigned long) sf) & 3))
goto segv;
- get_user(pc, &sf->regs.pc);
- __get_user(npc, &sf->regs.npc);
+ if (get_user(pc, &sf->regs.pc) ||
+ __get_user(npc, &sf->regs.npc))
+ goto segv;
if ((pc | npc) & 3)
goto segv;
diff --git a/arch/sparc/kernel/signal_32.c b/arch/sparc/kernel/signal_32.c
index ac8e66b50f07..2b7e849f7c65 100644
--- a/arch/sparc/kernel/signal_32.c
+++ b/arch/sparc/kernel/signal_32.c
@@ -64,18 +64,8 @@ struct rt_signal_frame {
static int _sigpause_common(old_sigset_t set)
{
sigset_t blocked;
-
- current->saved_sigmask = current->blocked;
-
- set &= _BLOCKABLE;
siginitset(&blocked, set);
- set_current_blocked(&blocked);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_thread_flag(TIF_RESTORE_SIGMASK);
-
- return -ERESTARTNOHAND;
+ return sigsuspend(&blocked);
}
asmlinkage int sys_sigsuspend(old_sigset_t set)
diff --git a/arch/sparc/kernel/signal_64.c b/arch/sparc/kernel/signal_64.c
index 48b0f57b65f7..eafaab486b2d 100644
--- a/arch/sparc/kernel/signal_64.c
+++ b/arch/sparc/kernel/signal_64.c
@@ -242,19 +242,8 @@ struct rt_signal_frame {
static long _sigpause_common(old_sigset_t set)
{
sigset_t blocked;
-
- current->saved_sigmask = current->blocked;
-
- set &= _BLOCKABLE;
siginitset(&blocked, set);
- set_current_blocked(&blocked);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
-
- set_restore_sigmask();
-
- return -ERESTARTNOHAND;
+ return sigsuspend(&blocked);
}
asmlinkage long sys_sigpause(unsigned int set)
diff --git a/arch/sparc/kernel/sys_sparc_32.c b/arch/sparc/kernel/sys_sparc_32.c
index 627e89af1d71..0c9b31b22e07 100644
--- a/arch/sparc/kernel/sys_sparc_32.c
+++ b/arch/sparc/kernel/sys_sparc_32.c
@@ -184,10 +184,10 @@ sparc_sigaction (int sig, const struct old_sigaction __user *act,
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
- __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
+ __get_user(new_ka.sa.sa_restorer, &act->sa_restorer) ||
+ __get_user(new_ka.sa.sa_flags, &act->sa_flags) ||
+ __get_user(mask, &act->sa_mask))
return -EFAULT;
- __get_user(new_ka.sa.sa_flags, &act->sa_flags);
- __get_user(mask, &act->sa_mask);
siginitset(&new_ka.sa.sa_mask, mask);
new_ka.ka_restorer = NULL;
}
@@ -195,17 +195,12 @@ sparc_sigaction (int sig, const struct old_sigaction __user *act,
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
- /* In the clone() case we could copy half consistent
- * state to the user, however this could sleep and
- * deadlock us if we held the signal lock on SMP. So for
- * now I take the easy way out and do no locking.
- */
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
- __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
+ __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer) ||
+ __put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
+ __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
- __put_user(old_ka.sa.sa_flags, &oact->sa_flags);
- __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask);
}
return ret;
diff --git a/arch/um/kernel/signal.c b/arch/um/kernel/signal.c
index 187118fbe1bc..292e706016c5 100644
--- a/arch/um/kernel/signal.c
+++ b/arch/um/kernel/signal.c
@@ -148,15 +148,8 @@ int do_signal(void)
long sys_sigsuspend(int history0, int history1, old_sigset_t mask)
{
sigset_t blocked;
-
- mask &= _BLOCKABLE;
siginitset(&blocked, mask);
- set_current_blocked(&blocked);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- set_thread_flag(TIF_RESTORE_SIGMASK);
- return -ERESTARTNOHAND;
+ return sigsuspend(&blocked);
}
long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss)
diff --git a/arch/unicore32/kernel/signal.c b/arch/unicore32/kernel/signal.c
index 911b549a6df5..7754df6ef7d4 100644
--- a/arch/unicore32/kernel/signal.c
+++ b/arch/unicore32/kernel/signal.c
@@ -370,10 +370,7 @@ static int handle_signal(unsigned long sig, struct k_sigaction *ka,
/*
* Block the signal if we were successful.
*/
- sigorsets(&blocked, &tsk->blocked, &ka->sa.sa_mask);
- if (!(ka->sa.sa_flags & SA_NODEFER))
- sigaddset(&blocked, sig);
- set_current_blocked(&blocked);
+ block_sigmask(ka, sig);
return 0;
}
@@ -450,15 +447,12 @@ static void do_signal(struct pt_regs *regs, int syscall)
regs->UCreg_00 == -ERESTARTNOINTR) {
setup_syscall_restart(regs);
}
-
- /* 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);
- sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
- }
}
+ /* If there's no signal to deliver, we just put the saved
+ * sigmask back.
+ */
+ if (test_and_clear_thread_flag(TIF_RESTORE_SIGMASK))
+ set_current_blocked(&current->saved_sigmask);
}
asmlinkage void do_notify_resume(struct pt_regs *regs,
diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
index 0b3f2354f6aa..98bd70faccc5 100644
--- a/arch/x86/ia32/ia32_signal.c
+++ b/arch/x86/ia32/ia32_signal.c
@@ -131,18 +131,8 @@ int copy_siginfo_from_user32(siginfo_t *to, compat_siginfo_t __user *from)
asmlinkage long sys32_sigsuspend(int history0, int history1, old_sigset_t mask)
{
sigset_t blocked;
-
- current->saved_sigmask = current->blocked;
-
- mask &= _BLOCKABLE;
siginitset(&blocked, mask);
- set_current_blocked(&blocked);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
-
- set_restore_sigmask();
- return -ERESTARTNOHAND;
+ return sigsuspend(&blocked);
}
asmlinkage long sys32_sigaltstack(const stack_ia32_t __user *uss_ptr,
diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
index 115eac431483..b68ccadd2ff4 100644
--- a/arch/x86/kernel/signal.c
+++ b/arch/x86/kernel/signal.c
@@ -478,18 +478,8 @@ asmlinkage int
sys_sigsuspend(int history0, int history1, old_sigset_t mask)
{
sigset_t blocked;
-
- current->saved_sigmask = current->blocked;
-
- mask &= _BLOCKABLE;
siginitset(&blocked, mask);
- set_current_blocked(&blocked);
-
- current->state = TASK_INTERRUPTIBLE;
- schedule();
-
- set_restore_sigmask();
- return -ERESTARTNOHAND;
+ return sigsuspend(&blocked);
}
asmlinkage int
diff --git a/arch/xtensa/include/asm/signal.h b/arch/xtensa/include/asm/signal.h
index 633ba73bc4d2..7f201b9d4195 100644
--- a/arch/xtensa/include/asm/signal.h
+++ b/arch/xtensa/include/asm/signal.h
@@ -120,13 +120,6 @@ typedef void (*__sighandler_t)(int);
#define SIG_ERR ((__sighandler_t)-1) /* error return from signal */
#ifdef __KERNEL__
-struct old_sigaction {
- __sighandler_t sa_handler;
- old_sigset_t sa_mask;
- unsigned long sa_flags;
- void (*sa_restorer)(void);
-};
-
struct sigaction {
__sighandler_t sa_handler;
unsigned long sa_flags;
diff --git a/arch/xtensa/include/asm/syscall.h b/arch/xtensa/include/asm/syscall.h
index efcf33b92e4c..0b9f2e13c781 100644
--- a/arch/xtensa/include/asm/syscall.h
+++ b/arch/xtensa/include/asm/syscall.h
@@ -15,10 +15,6 @@ asmlinkage long xtensa_clone(unsigned long, unsigned long, struct pt_regs*);
asmlinkage long xtensa_ptrace(long, long, long, long);
asmlinkage long xtensa_sigreturn(struct pt_regs*);
asmlinkage long xtensa_rt_sigreturn(struct pt_regs*);
-asmlinkage long xtensa_sigsuspend(struct pt_regs*);
-asmlinkage long xtensa_rt_sigsuspend(struct pt_regs*);
-asmlinkage long xtensa_sigaction(int, const struct old_sigaction*,
- struct old_sigaction*);
asmlinkage long xtensa_sigaltstack(struct pt_regs *regs);
asmlinkage long sys_rt_sigaction(int,
const struct sigaction __user *,
diff --git a/arch/xtensa/include/asm/thread_info.h b/arch/xtensa/include/asm/thread_info.h
index 6abbedd09d85..81abfd5d01ac 100644
--- a/arch/xtensa/include/asm/thread_info.h
+++ b/arch/xtensa/include/asm/thread_info.h
@@ -131,6 +131,7 @@ static inline struct thread_info *current_thread_info(void)
#define TIF_IRET 4 /* return with iret */
#define TIF_MEMDIE 5 /* is terminating due to OOM killer */
#define TIF_RESTORE_SIGMASK 6 /* restore signal mask in do_signal() */
+#define TIF_NOTIFY_RESUME 7 /* callback before returning to user */
#define TIF_POLLING_NRFLAG 16 /* true if poll_idle() is polling TIF_NEED_RESCHED */
#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
diff --git a/arch/xtensa/include/asm/unistd.h b/arch/xtensa/include/asm/unistd.h
index 798ee6d285a1..bc7e005faa60 100644
--- a/arch/xtensa/include/asm/unistd.h
+++ b/arch/xtensa/include/asm/unistd.h
@@ -507,7 +507,7 @@ __SYSCALL(229, sys_rt_sigtimedwait, 4)
#define __NR_rt_sigqueueinfo 230
__SYSCALL(230, sys_rt_sigqueueinfo, 3)
#define __NR_rt_sigsuspend 231
-__SYSCALL(231, xtensa_rt_sigsuspend, 2)
+__SYSCALL(231, sys_rt_sigsuspend, 2)
/* Message */
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S
index 6223f3346b5c..7e6236073397 100644
--- a/arch/xtensa/kernel/entry.S
+++ b/arch/xtensa/kernel/entry.S
@@ -409,16 +409,16 @@ common_exception_return:
l32i a4, a2, TI_FLAGS
_bbsi.l a4, TIF_NEED_RESCHED, 3f
+ _bbsi.l a4, TIF_NOTIFY_RESUME, 2f
_bbci.l a4, TIF_SIGPENDING, 4f
- l32i a4, a1, PT_DEPC
+2: l32i a4, a1, PT_DEPC
bgeui a4, VALID_DOUBLE_EXCEPTION_ADDRESS, 4f
/* Call do_signal() */
- movi a4, do_signal # int do_signal(struct pt_regs*, sigset_t*)
+ movi a4, do_notify_resume # int do_notify_resume(struct pt_regs*)
mov a6, a1
- movi a7, 0
callx4 a4
j 1b
diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c
index d78869a00b11..c5e4ec0598d2 100644
--- a/arch/xtensa/kernel/signal.c
+++ b/arch/xtensa/kernel/signal.c
@@ -20,6 +20,7 @@
#include <linux/ptrace.h>
#include <linux/personality.h>
#include <linux/freezer.h>
+#include <linux/tracehook.h>
#include <asm/ucontext.h>
#include <asm/uaccess.h>
@@ -31,8 +32,6 @@
#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
@@ -248,6 +247,9 @@ asmlinkage long xtensa_rt_sigreturn(long a0, long a1, long a2, long a3,
sigset_t set;
int ret;
+ /* Always make any pending restarted system calls return -EINTR */
+ current_thread_info()->restart_block.fn = do_no_restart_syscall;
+
if (regs->depc > 64)
panic("rt_sigreturn in double exception!\n");
@@ -426,37 +428,6 @@ 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,
@@ -476,19 +447,19 @@ 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)
+static void do_signal(struct pt_regs *regs)
{
siginfo_t info;
int signr;
struct k_sigaction ka;
-
- if (!user_mode(regs))
- return 0;
+ sigset_t oldset;
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;
@@ -532,13 +503,14 @@ 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:
@@ -558,8 +530,27 @@ 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;
}
+void do_notify_resume(struct pt_regs *regs)
+{
+ if (!user_mode(regs))
+ return;
+
+ if (test_thread_flag(TIF_SIGPENDING))
+ do_signal(regs);
+
+ if (test_and_clear_thread_flag(TIF_NOTIFY_RESUME)) {
+ tracehook_notify_resume(regs);
+ if (current->replacement_session_keyring)
+ key_replace_session_keyring();
+ }
+}