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xtensa: switch to generic rt_sigsuspend(2)

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-04-22 00:59:07 -04:00
parent 446cdd1327
commit 9ccc9c75c9
4 changed files with 16 additions and 43 deletions
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2
arch/xtensa/include/asm/syscall.h
View File

@ -15,8 +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);

2
arch/xtensa/include/asm/unistd.h
View File

@ -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 */

1
arch/xtensa/kernel/entry.S
View File

@ -418,7 +418,6 @@ common_exception_return:
movi a4, do_signal # int do_signal(struct pt_regs*, sigset_t*)
mov a6, a1
movi a7, 0
callx4 a4
j 1b

54
arch/xtensa/kernel/signal.c
View File

@ -31,8 +31,6 @@
#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
@ -429,37 +427,6 @@ 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,
@ -479,19 +446,22 @@ 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)
void do_signal(struct pt_regs *regs)
{
siginfo_t info;
int signr;
struct k_sigaction ka;
sigset_t oldset;
if (!user_mode(regs))
return 0;
return;
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;
@ -535,13 +505,14 @@ 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:
@ -561,8 +532,13 @@ 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;
}