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Commit 710e91e4 authored by Al Viro's avatar Al Viro Committed by Geert Uytterhoeven
Browse files

m68knommu: Switch to saner sigsuspend 



Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Acked-by: default avatarGreg Ungerer <gerg@uclinux.org>
Signed-off-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
parent bf814b45

arch/m68k/include/asm/unistd.h

+0 −2
Original line number Diff line number Diff line
@@ -373,9 +373,7 @@ 
#define __ARCH_WANT_SYS_SIGPENDING

#define __ARCH_WANT_SYS_SIGPROCMASK

#define __ARCH_WANT_SYS_RT_SIGACTION

#ifndef __uClinux__

#define __ARCH_WANT_SYS_RT_SIGSUSPEND

#endif



/*

 * "Conditional" syscalls

arch/m68knommu/kernel/entry.S

+0 −16
Original line number Diff line number Diff line
@@ -112,22 +112,6 @@ ENTRY(sys_clone) 
	RESTORE_SWITCH_STACK

	rts



ENTRY(sys_sigsuspend)

	SAVE_SWITCH_STACK

	pea	%sp@(SWITCH_STACK_SIZE)

	jbsr	do_sigsuspend

	addql	#4,%sp

	RESTORE_SWITCH_STACK

	rts



ENTRY(sys_rt_sigsuspend)

	SAVE_SWITCH_STACK

	pea	%sp@(SWITCH_STACK_SIZE)

	jbsr	do_rt_sigsuspend

	addql	#4,%sp

	RESTORE_SWITCH_STACK

	rts



ENTRY(sys_sigreturn)

	SAVE_SWITCH_STACK

	jbsr	do_sigreturn

arch/m68knommu/kernel/signal.c

+19 −44
Original line number Diff line number Diff line
@@ -53,60 +53,25 @@ 


void ret_from_user_signal(void);

void ret_from_user_rt_signal(void);

asmlinkage int do_signal(sigset_t *oldset, struct pt_regs *regs);



/*

 * Atomically swap in the new signal mask, and wait for a signal.

 */

asmlinkage int do_sigsuspend(struct pt_regs *regs)

asmlinkage int

sys_sigsuspend(int unused0, int unused1, old_sigset_t mask)

{

	old_sigset_t mask = regs->d3;

	sigset_t saveset;



	mask &= _BLOCKABLE;

	spin_lock_irq(&current->sighand->siglock);

	saveset = current->blocked;

	current->saved_sigmask = current->blocked;

	siginitset(&current->blocked, mask);

	recalc_sigpending();

	spin_unlock_irq(&current->sighand->siglock);



	regs->d0 = -EINTR;

	while (1) {

	current->state = TASK_INTERRUPTIBLE;

	schedule();

		if (do_signal(&saveset, regs))

			return -EINTR;

	}

}



asmlinkage int

do_rt_sigsuspend(struct pt_regs *regs)

{

	sigset_t *unewset = (sigset_t *)regs->d1;

	size_t sigsetsize = (size_t)regs->d2;

	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);

	set_restore_sigmask();



	spin_lock_irq(&current->sighand->siglock);

	saveset = current->blocked;

	current->blocked = newset;

	recalc_sigpending();

	spin_unlock_irq(&current->sighand->siglock);



	regs->d0 = -EINTR;

	while (1) {

		current->state = TASK_INTERRUPTIBLE;

		schedule();

		if (do_signal(&saveset, regs))

			return -EINTR;

	}

	return -ERESTARTNOHAND;

}



asmlinkage int
@@ -752,11 +717,12 @@ handle_signal(int sig, struct k_sigaction *ka, siginfo_t *info, 
 * want to handle. Thus you cannot kill init even with a SIGKILL even by

 * mistake.

 */

asmlinkage int do_signal(sigset_t *oldset, struct pt_regs *regs)

asmlinkage int do_signal(struct pt_regs *regs)

{

	struct k_sigaction ka;

	siginfo_t info;

	int signr;

	sigset_t *oldset;



	/*

	 * We want the common case to go fast, which
@@ -767,13 +733,16 @@ asmlinkage int do_signal(sigset_t *oldset, struct pt_regs *regs) 
	if (!user_mode(regs))

		return 1;



	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, &ka, &info, oldset, regs);

		clear_thread_flag(TIF_RESTORE_SIGMASK);

		return 1;

	}
@@ -782,5 +751,11 @@ asmlinkage int do_signal(sigset_t *oldset, struct pt_regs *regs) 
		/* Restart the system call - no handlers present */

		handle_restart(regs, NULL, 0);

	}



	/* 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);

	}

	return 0;

}

arch/m68knommu/platform/68328/entry.S

+1 −2
Original line number Diff line number Diff line
@@ -120,9 +120,8 @@ Lsignal_return: 
	subql	#4,%sp			/* dummy return address*/

	SAVE_SWITCH_STACK

	pea	%sp@(SWITCH_STACK_SIZE)

	clrl	%sp@-

	bsrw	do_signal

	addql	#8,%sp

	addql	#4,%sp

	RESTORE_SWITCH_STACK

	addql	#4,%sp

Lreturn:

arch/m68knommu/platform/68360/entry.S

+1 −2
Original line number Diff line number Diff line
@@ -116,9 +116,8 @@ Lsignal_return: 
	subql	#4,%sp			/* dummy return address*/

	SAVE_SWITCH_STACK

	pea	%sp@(SWITCH_STACK_SIZE)

	clrl	%sp@-

	bsrw	do_signal

	addql	#8,%sp

	addql	#4,%sp

	RESTORE_SWITCH_STACK

	addql	#4,%sp

Lreturn: