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sh: switch to saved_sigmask-based sigsuspend()/rt_sigsuspend() 

Complete the move of sh64 to it, trim the crap from prototypes,
tidy up a bit.  Infrastructure in do_signal() had already been
there, in signal_64 as well as in signal_32 (where it was already
used).

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-04-22 01:16:34 -04:00
parent 9ccc9c75c9
commit 9ef461adf9
4 changed files with 13 additions and 71 deletions
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4
arch/sh/include/asm/syscalls_32.h
View File

@ -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,

4
arch/sh/include/asm/unistd.h
View File

@ -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

4
arch/sh/kernel/signal_32.c
View File

@ -53,9 +53,7 @@ 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;
siginitset(&blocked, mask);

72
arch/sh/kernel/signal_64.c
View File

@ -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
@ -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);