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OpenCloudOS-Kernel
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m68knommu: fix syscall restarting 

Make restart blocks working, required for proper syscall restarting.
Derived from same changes for m68k arch by Andreas Schwab <schwab@suse.de>

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
This commit is contained in:
Greg Ungerer 2009-01-13 16:27:03 +10:00
parent d88ffccbca
commit f3221a39de
2 changed files with 16 additions and 1 deletions
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15
arch/m68knommu/kernel/signal.c
View File

@ -279,6 +279,9 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext *usc, void *fp,
struct sigcontext context;
int err = 0;
/* 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;
@ -316,6 +319,9 @@ 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;
@ -692,6 +698,15 @@ 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;

2
arch/m68knommu/kernel/syscalltable.S
View File

@ -18,7 +18,7 @@
.text
ALIGN
ENTRY(sys_call_table)
.long sys_ni_syscall /* 0 - old "setup()" system call*/
.long sys_restart_syscall /* 0 - old "setup()" system call */
.long sys_exit
.long sys_fork
.long sys_read