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authorRichard Henderson <rth@twiddle.net>2007-05-29 16:03:28 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-30 10:07:54 -0700
commitb927b3e2c9bc39b7eeeaca91e4cd6c3ed59f165a (patch)
treeabdb72c2f2b8ab6cfaa954b558e8c078d04d1a85 /arch/alpha
parent74fd1b687fbeba566ceb59cc1fdbc7a64c5e0c0b (diff)
downloadlinux-linaro-b927b3e2c9bc39b7eeeaca91e4cd6c3ed59f165a.tar.gz
alpha: support new syscalls
Some of the new syscalls require supporting TIF_RESTORE_SIGMASK. Signed-off-by: Richard Henderson <rth@twiddle.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/alpha')
-rw-r--r--arch/alpha/kernel/entry.S7
-rw-r--r--arch/alpha/kernel/signal.c110
-rw-r--r--arch/alpha/kernel/systbls.S32
3 files changed, 98 insertions, 51 deletions
diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S
index c95e95e1ab0..debc8f03886 100644
--- a/arch/alpha/kernel/entry.S
+++ b/arch/alpha/kernel/entry.S
@@ -391,11 +391,10 @@ $work_resched:
bne $2, $work_resched
$work_notifysig:
- mov $sp, $17
+ mov $sp, $16
br $1, do_switch_stack
- mov $5, $21
- mov $sp, $18
- mov $31, $16
+ mov $sp, $17
+ mov $5, $18
jsr $26, do_notify_resume
bsr $1, undo_switch_stack
br restore_all
diff --git a/arch/alpha/kernel/signal.c b/arch/alpha/kernel/signal.c
index 7f64aa767d5..410af4f3140 100644
--- a/arch/alpha/kernel/signal.c
+++ b/arch/alpha/kernel/signal.c
@@ -32,8 +32,8 @@
#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
asmlinkage void ret_from_sys_call(void);
-static int do_signal(sigset_t *, struct pt_regs *, struct switch_stack *,
- unsigned long, unsigned long);
+static void do_signal(struct pt_regs *, struct switch_stack *,
+ unsigned long, unsigned long);
/*
@@ -146,11 +146,9 @@ sys_rt_sigaction(int sig, const struct sigaction __user *act,
asmlinkage int
do_sigsuspend(old_sigset_t mask, struct pt_regs *regs, struct switch_stack *sw)
{
- sigset_t oldset;
-
mask &= _BLOCKABLE;
spin_lock_irq(&current->sighand->siglock);
- oldset = current->blocked;
+ current->saved_sigmask = current->blocked;
siginitset(&current->blocked, mask);
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
@@ -160,19 +158,17 @@ do_sigsuspend(old_sigset_t mask, struct pt_regs *regs, struct switch_stack *sw)
regs->r0 = EINTR;
regs->r19 = 1;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- if (do_signal(&oldset, regs, sw, 0, 0))
- return -EINTR;
- }
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+ set_thread_flag(TIF_RESTORE_SIGMASK);
+ return -ERESTARTNOHAND;
}
asmlinkage int
do_rt_sigsuspend(sigset_t __user *uset, size_t sigsetsize,
struct pt_regs *regs, struct switch_stack *sw)
{
- sigset_t oldset, set;
+ sigset_t set;
/* XXX: Don't preclude handling different sized sigset_t's. */
if (sigsetsize != sizeof(sigset_t))
@@ -182,7 +178,7 @@ do_rt_sigsuspend(sigset_t __user *uset, size_t sigsetsize,
sigdelsetmask(&set, ~_BLOCKABLE);
spin_lock_irq(&current->sighand->siglock);
- oldset = current->blocked;
+ current->saved_sigmask = current->blocked;
current->blocked = set;
recalc_sigpending();
spin_unlock_irq(&current->sighand->siglock);
@@ -192,12 +188,10 @@ do_rt_sigsuspend(sigset_t __user *uset, size_t sigsetsize,
regs->r0 = EINTR;
regs->r19 = 1;
- while (1) {
- current->state = TASK_INTERRUPTIBLE;
- schedule();
- if (do_signal(&oldset, regs, sw, 0, 0))
- return -EINTR;
- }
+ current->state = TASK_INTERRUPTIBLE;
+ schedule();
+ set_thread_flag(TIF_RESTORE_SIGMASK);
+ return -ERESTARTNOHAND;
}
asmlinkage int
@@ -436,7 +430,7 @@ setup_sigcontext(struct sigcontext __user *sc, struct pt_regs *regs,
return err;
}
-static void
+static int
setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
struct pt_regs *regs, struct switch_stack * sw)
{
@@ -481,13 +475,14 @@ setup_frame(int sig, struct k_sigaction *ka, sigset_t *set,
current->comm, current->pid, frame, regs->pc, regs->r26);
#endif
- return;
+ return 0;
give_sigsegv:
force_sigsegv(sig, current);
+ return -EFAULT;
}
-static void
+static int
setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *set, struct pt_regs *regs, struct switch_stack * sw)
{
@@ -543,34 +538,38 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
current->comm, current->pid, frame, regs->pc, regs->r26);
#endif
- return;
+ return 0;
give_sigsegv:
force_sigsegv(sig, current);
+ return -EFAULT;
}
/*
* OK, we're invoking a handler.
*/
-static inline void
+static inline int
handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info,
sigset_t *oldset, struct pt_regs * regs, struct switch_stack *sw)
{
+ int ret;
+
if (ka->sa.sa_flags & SA_SIGINFO)
- setup_rt_frame(sig, ka, info, oldset, regs, sw);
+ ret = setup_rt_frame(sig, ka, info, oldset, regs, sw);
else
- setup_frame(sig, ka, oldset, regs, sw);
+ ret = setup_frame(sig, ka, oldset, regs, sw);
- if (ka->sa.sa_flags & SA_RESETHAND)
- 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);
+ }
- 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);
+ return ret;
}
static inline void
@@ -611,30 +610,42 @@ syscall_restart(unsigned long r0, unsigned long r19,
* restart. "r0" is also used as an indicator whether we can restart at
* all (if we get here from anything but a syscall return, it will be 0)
*/
-static int
-do_signal(sigset_t *oldset, struct pt_regs * regs, struct switch_stack * sw,
+static void
+do_signal(struct pt_regs * regs, struct switch_stack * sw,
unsigned long r0, unsigned long r19)
{
siginfo_t info;
int signr;
unsigned long single_stepping = ptrace_cancel_bpt(current);
struct k_sigaction ka;
+ sigset_t *oldset;
- if (!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);
+
/* ... so re-check the single stepping. */
single_stepping |= ptrace_cancel_bpt(current);
if (signr > 0) {
/* Whee! Actually deliver the signal. */
- if (r0) syscall_restart(r0, r19, regs, &ka);
- handle_signal(signr, &ka, &info, oldset, regs, sw);
+ 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);
+ }
if (single_stepping)
ptrace_set_bpt(current); /* re-set bpt */
- return 1;
+ return;
}
if (r0) {
@@ -654,17 +665,22 @@ do_signal(sigset_t *oldset, struct pt_regs * regs, struct switch_stack * sw,
break;
}
}
+
+ /* 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 (single_stepping)
ptrace_set_bpt(current); /* re-set breakpoint */
-
- return 0;
}
void
-do_notify_resume(sigset_t *oldset, struct pt_regs *regs,
- struct switch_stack *sw, unsigned long r0,
- unsigned long r19, unsigned long thread_info_flags)
+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)
- do_signal(oldset, regs, sw, r0, r19);
+ if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
+ do_signal(regs, sw, r0, r19);
}
diff --git a/arch/alpha/kernel/systbls.S b/arch/alpha/kernel/systbls.S
index f6cfe8ce3f9..79de99e32c3 100644
--- a/arch/alpha/kernel/systbls.S
+++ b/arch/alpha/kernel/systbls.S
@@ -465,6 +465,38 @@ sys_call_table:
.quad sys_inotify_init
.quad sys_inotify_add_watch /* 445 */
.quad sys_inotify_rm_watch
+ .quad sys_fdatasync
+ .quad sys_kexec_load
+ .quad sys_migrate_pages
+ .quad sys_openat /* 450 */
+ .quad sys_mkdirat
+ .quad sys_mknodat
+ .quad sys_fchownat
+ .quad sys_futimesat
+ .quad sys_fstatat64 /* 455 */
+ .quad sys_unlinkat
+ .quad sys_renameat
+ .quad sys_linkat
+ .quad sys_symlinkat
+ .quad sys_readlinkat /* 460 */
+ .quad sys_fchmodat
+ .quad sys_faccessat
+ .quad sys_pselect6
+ .quad sys_ppoll
+ .quad sys_unshare /* 465 */
+ .quad sys_set_robust_list
+ .quad sys_get_robust_list
+ .quad sys_splice
+ .quad sys_sync_file_range
+ .quad sys_tee /* 470 */
+ .quad sys_vmsplice
+ .quad sys_move_pages
+ .quad sys_getcpu
+ .quad sys_epoll_pwait
+ .quad sys_utimensat /* 475 */
+ .quad sys_signalfd
+ .quad sys_timerfd
+ .quad sys_eventfd
.size sys_call_table, . - sys_call_table
.type sys_call_table, @object