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h8300: switch to saved_sigmask-based sigsuspend/rt_sigsuspend 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-04-22 01:30:05 -04:00
parent 8b6c3309c9
commit 7ae4e32a65
3 changed files with 21 additions and 59 deletions
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1
arch/h8300/include/asm/unistd.h
View File

@ -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

73
arch/h8300/kernel/signal.c
View File

@ -49,56 +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, blocked;
saveset = current->blocked;
mask &= _BLOCKABLE;
siginitset(&blocked, mask);
set_current_blocked(&blocked);
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);
saveset = current->blocked;
set_current_blocked(&newset);
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
@ -482,8 +441,10 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
else
ret = setup_frame(sig, ka, oldset, regs);
if (!ret)
if (!ret) {
block_sigmask(ka, sig);
clear_thread_flag(TIF_RESTORE_SIGMASK);
}
}
/*
@ -491,11 +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
@ -504,21 +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? */
@ -535,13 +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);

6
arch/h8300/kernel/syscalls.S
View File

@ -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