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authorDavid Woodhouse <dwmw2@infradead.org>2006-01-18 17:44:01 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-18 19:20:30 -0800
commitf27201da5c8f118cfe266f51447bdd108d5f081d (patch)
tree9d889f4afec179b5b6f422b58dd36fa7606f3eee /arch
parent283828f3c19ceb3a64a8544d42cc189003e8b0fe (diff)
downloadop-kernel-dev-f27201da5c8f118cfe266f51447bdd108d5f081d.zip
op-kernel-dev-f27201da5c8f118cfe266f51447bdd108d5f081d.tar.gz
[PATCH] TIF_RESTORE_SIGMASK support for arch/powerpc
Implement the TIF_RESTORE_SIGMASK flag in the new arch/powerpc kernel, for both 32-bit and 64-bit system call paths. Signed-off-by: David Woodhouse <dwmw2@infradead.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/kernel/entry_32.S8
-rw-r--r--arch/powerpc/kernel/entry_64.S2
-rw-r--r--arch/powerpc/kernel/signal_32.c20
-rw-r--r--arch/powerpc/kernel/signal_64.c20
-rw-r--r--arch/powerpc/kernel/systbl.S2
5 files changed, 40 insertions, 12 deletions
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index d8da2a3..f20a672 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -227,7 +227,7 @@ ret_from_syscall:
MTMSRD(r10)
lwz r9,TI_FLAGS(r12)
li r8,-_LAST_ERRNO
- andi. r0,r9,(_TIF_SYSCALL_T_OR_A|_TIF_SIGPENDING|_TIF_NEED_RESCHED|_TIF_RESTOREALL)
+ andi. r0,r9,(_TIF_SYSCALL_T_OR_A|_TIF_SIGPENDING|_TIF_NEED_RESCHED|_TIF_RESTOREALL|_TIF_RESTORE_SIGMASK)
bne- syscall_exit_work
cmplw 0,r3,r8
blt+ syscall_exit_cont
@@ -357,7 +357,7 @@ save_user_nvgprs_cont:
lwz r5,_MSR(r1)
andi. r5,r5,MSR_PR
beq ret_from_except
- andi. r0,r9,_TIF_SIGPENDING
+ andi. r0,r9,_TIF_SIGPENDING|_TIF_RESTORE_SIGMASK
beq ret_from_except
b do_user_signal
8:
@@ -683,7 +683,7 @@ user_exc_return: /* r10 contains MSR_KERNEL here */
/* Check current_thread_info()->flags */
rlwinm r9,r1,0,0,(31-THREAD_SHIFT)
lwz r9,TI_FLAGS(r9)
- andi. r0,r9,(_TIF_SIGPENDING|_TIF_NEED_RESCHED|_TIF_RESTOREALL)
+ andi. r0,r9,(_TIF_SIGPENDING|_TIF_NEED_RESCHED|_TIF_RESTOREALL|_TIF_RESTORE_SIGMASK)
bne do_work
restore_user:
@@ -917,7 +917,7 @@ recheck:
lwz r9,TI_FLAGS(r9)
andi. r0,r9,_TIF_NEED_RESCHED
bne- do_resched
- andi. r0,r9,_TIF_SIGPENDING
+ andi. r0,r9,_TIF_SIGPENDING|_TIF_RESTORE_SIGMASK
beq restore_user
do_user_signal: /* r10 contains MSR_KERNEL here */
ori r10,r10,MSR_EE
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index 5420363..388f861 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -160,7 +160,7 @@ syscall_exit:
mtmsrd r10,1
ld r9,TI_FLAGS(r12)
li r11,-_LAST_ERRNO
- andi. r0,r9,(_TIF_SYSCALL_T_OR_A|_TIF_SINGLESTEP|_TIF_SIGPENDING|_TIF_NEED_RESCHED|_TIF_RESTOREALL|_TIF_SAVE_NVGPRS|_TIF_NOERROR)
+ andi. r0,r9,(_TIF_SYSCALL_T_OR_A|_TIF_SINGLESTEP|_TIF_SIGPENDING|_TIF_NEED_RESCHED|_TIF_RESTOREALL|_TIF_SAVE_NVGPRS|_TIF_NOERROR|_TIF_RESTORE_SIGMASK)
bne- syscall_exit_work
cmpld r3,r11
ld r5,_CCR(r1)
diff --git a/arch/powerpc/kernel/signal_32.c b/arch/powerpc/kernel/signal_32.c
index 7f0d5ce..3747ab0 100644
--- a/arch/powerpc/kernel/signal_32.c
+++ b/arch/powerpc/kernel/signal_32.c
@@ -1128,7 +1128,7 @@ int do_signal(sigset_t *oldset, struct pt_regs *regs)
{
siginfo_t info;
struct k_sigaction ka;
- unsigned int frame, newsp;
+ unsigned int newsp;
int signr, ret;
#ifdef CONFIG_PPC32
@@ -1139,11 +1139,11 @@ int do_signal(sigset_t *oldset, struct pt_regs *regs)
}
#endif
- if (!oldset)
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ oldset = &current->saved_sigmask;
+ else if (!oldset)
oldset = &current->blocked;
- newsp = frame = 0;
-
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
#ifdef CONFIG_PPC32
no_signal:
@@ -1173,8 +1173,14 @@ no_signal:
}
}
- if (signr == 0)
+ if (signr == 0) {
+ /* No signal to deliver -- 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);
+ }
return 0; /* no signals delivered */
+ }
if ((ka.sa.sa_flags & SA_ONSTACK) && current->sas_ss_size
&& !on_sig_stack(regs->gpr[1]))
@@ -1207,6 +1213,10 @@ no_signal:
sigaddset(&current->blocked, signr);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
+ /* A signal was successfully delivered; the saved sigmask is in
+ its frame, and we can clear the TIF_RESTORE_SIGMASK flag */
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
}
return ret;
diff --git a/arch/powerpc/kernel/signal_64.c b/arch/powerpc/kernel/signal_64.c
index a4a6812..b319311 100644
--- a/arch/powerpc/kernel/signal_64.c
+++ b/arch/powerpc/kernel/signal_64.c
@@ -520,11 +520,15 @@ int do_signal(sigset_t *oldset, struct pt_regs *regs)
if (test_thread_flag(TIF_32BIT))
return do_signal32(oldset, regs);
- if (!oldset)
+ if (test_thread_flag(TIF_RESTORE_SIGMASK))
+ oldset = &current->saved_sigmask;
+ else if (!oldset)
oldset = &current->blocked;
signr = get_signal_to_deliver(&info, &ka, regs, NULL);
if (signr > 0) {
+ int ret;
+
/* Whee! Actually deliver the signal. */
if (TRAP(regs) == 0x0C00)
syscall_restart(regs, &ka);
@@ -537,7 +541,14 @@ int do_signal(sigset_t *oldset, struct pt_regs *regs)
if (current->thread.dabr)
set_dabr(current->thread.dabr);
- return handle_signal(signr, &ka, &info, oldset, regs);
+ ret = handle_signal(signr, &ka, &info, oldset, regs);
+
+ /* If a signal was successfully delivered, the saved sigmask is in
+ its frame, and we can clear the TIF_RESTORE_SIGMASK flag */
+ if (ret && test_thread_flag(TIF_RESTORE_SIGMASK))
+ clear_thread_flag(TIF_RESTORE_SIGMASK);
+
+ return ret;
}
if (TRAP(regs) == 0x0C00) { /* System Call! */
@@ -553,6 +564,11 @@ int do_signal(sigset_t *oldset, struct pt_regs *regs)
regs->result = 0;
}
}
+ /* No signal to deliver -- 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);
+ }
return 0;
}
diff --git a/arch/powerpc/kernel/systbl.S b/arch/powerpc/kernel/systbl.S
index 6801317..007b15e 100644
--- a/arch/powerpc/kernel/systbl.S
+++ b/arch/powerpc/kernel/systbl.S
@@ -321,3 +321,5 @@ SYSCALL(inotify_add_watch)
SYSCALL(inotify_rm_watch)
SYSCALL(spu_run)
SYSCALL(spu_create)
+COMPAT_SYS(pselect6)
+COMPAT_SYS(ppoll)
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