Commit c162564e authored by Andreas Schwab's avatar Andreas Schwab Committed by Geert Uytterhoeven
Browse files

m68k: Wire up sys_restart_syscall 



Make restart blocks working, required for proper syscall restarting.

Signed-off-by: default avatarAndreas Schwab <schwab@suse.de>
Signed-off-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
parent 1fa0b29f

arch/m68k/kernel/entry.S

+1 −1
Original line number Diff line number Diff line
@@ -424,7 +424,7 @@ resume: 
.data

ALIGN

sys_call_table:

	.long sys_ni_syscall	/* 0  -  old "setup()" system call*/

	.long sys_restart_syscall	/* 0 - old "setup()" system call, used for restarting */

	.long sys_exit

	.long sys_fork

	.long sys_read

arch/m68k/kernel/signal.c

+15 −0
Original line number Diff line number Diff line
@@ -326,6 +326,9 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext __user *usc, void __u 
	struct sigcontext context;

	int err;



	/* Always make any pending restarted system calls return -EINTR */

	current_thread_info()->restart_block.fn = do_no_restart_syscall;



	/* get previous context */

	if (copy_from_user(&context, usc, sizeof(context)))

		goto badframe;
@@ -411,6 +414,9 @@ rt_restore_ucontext(struct pt_regs *regs, struct switch_stack *sw, 
	unsigned long usp;

	int err;



	/* Always make any pending restarted system calls return -EINTR */

	current_thread_info()->restart_block.fn = do_no_restart_syscall;



	err = __get_user(temp, &uc->uc_mcontext.version);

	if (temp != MCONTEXT_VERSION)

		goto badframe;
@@ -937,6 +943,15 @@ handle_restart(struct pt_regs *regs, struct k_sigaction *ka, int has_handler) 
		regs->d0 = -EINTR;

		break;



	case -ERESTART_RESTARTBLOCK:

		if (!has_handler) {

			regs->d0 = __NR_restart_syscall;

			regs->pc -= 2;

			break;

		}

		regs->d0 = -EINTR;

		break;



	case -ERESTARTSYS:

		if (has_handler && !(ka->sa.sa_flags & SA_RESTART)) {

			regs->d0 = -EINTR;

include/asm-m68k/unistd.h

+1 −3
Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ 
 * This file contains the system call numbers.

 */



#define __NR_restart_syscall	  0

#define __NR_exit		  1

#define __NR_fork		  2

#define __NR_read		  3
@@ -359,9 +360,6 @@ 
#define __ARCH_WANT_SYS_SIGPROCMASK

#define __ARCH_WANT_SYS_RT_SIGACTION



/* whitelist for checksyscalls */

#define __IGNORE_restart_syscall



/*

 * "Conditional" syscalls

 *