#define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
+void ret_from_user_signal(void);
+void ret_from_user_rt_signal(void);
asmlinkage int do_signal(sigset_t *oldset, struct pt_regs *regs);
/*
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;
regs->d1 = context.sc_d1;
regs->a0 = context.sc_a0;
regs->a1 = context.sc_a1;
+ ((struct switch_stack *)regs - 1)->a5 = context.sc_a5;
regs->sr = (regs->sr & 0xff00) | (context.sc_sr & 0xff);
regs->pc = context.sc_pc;
regs->orig_d0 = -1; /* disable syscall checks */
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;
sc->sc_d1 = regs->d1;
sc->sc_a0 = regs->a0;
sc->sc_a1 = regs->a1;
+ sc->sc_a5 = ((struct switch_stack *)regs - 1)->a5;
sc->sc_sr = regs->sr;
sc->sc_pc = regs->pc;
sc->sc_formatvec = regs->format << 12 | regs->vector;
return err;
}
-static inline void push_cache (unsigned long vaddr)
-{
-}
-
static inline void *
get_sigframe(struct k_sigaction *ka, struct pt_regs *regs, size_t frame_size)
{
/* This is the X/Open sanctioned signal stack switching. */
if (ka->sa.sa_flags & SA_ONSTACK) {
- if (!on_sig_stack(usp))
+ if (!sas_ss_flags(usp))
usp = current->sas_ss_sp + current->sas_ss_size;
}
return (void *)((usp - frame_size) & -8UL);
err |= copy_to_user (&frame->sc, &context, sizeof(context));
/* Set up to return from userspace. */
- err |= __put_user(frame->retcode, &frame->pretcode);
- /* moveq #,d0; trap #0 */
- err |= __put_user(0x70004e40 + (__NR_sigreturn << 16),
- (long *)(frame->retcode));
+ err |= __put_user((void *) ret_from_user_signal, &frame->pretcode);
if (err)
goto give_sigsegv;
- push_cache ((unsigned long) &frame->retcode);
-
/* Set up registers for signal handler */
wrusp ((unsigned long) frame);
regs->pc = (unsigned long) ka->sa.sa_handler;
+ ((struct switch_stack *)regs - 1)->a5 = current->mm->start_data;
+ regs->format = 0x4; /*set format byte to make stack appear modulo 4
+ which it will be when doing the rte */
adjust_stack:
/* Prepare to skip over the extra stuff in the exception frame. */
if (regs->stkadj) {
struct pt_regs *tregs =
(struct pt_regs *)((ulong)regs + regs->stkadj);
-#if DEBUG
+#if defined(DEBUG)
printk(KERN_DEBUG "Performing stackadjust=%04x\n", regs->stkadj);
#endif
/* This must be copied with decreasing addresses to
err |= copy_to_user (&frame->uc.uc_sigmask, set, sizeof(*set));
/* Set up to return from userspace. */
- err |= __put_user(frame->retcode, &frame->pretcode);
- /* moveq #,d0; notb d0; trap #0 */
- err |= __put_user(0x70004600 + ((__NR_rt_sigreturn ^ 0xff) << 16),
- (long *)(frame->retcode + 0));
- err |= __put_user(0x4e40, (short *)(frame->retcode + 4));
+ err |= __put_user((void *) ret_from_user_rt_signal, &frame->pretcode);
if (err)
goto give_sigsegv;
- push_cache ((unsigned long) &frame->retcode);
-
/* Set up registers for signal handler */
wrusp ((unsigned long) frame);
regs->pc = (unsigned long) ka->sa.sa_handler;
+ ((struct switch_stack *)regs - 1)->a5 = current->mm->start_data;
+ regs->format = 0x4; /*set format byte to make stack appear modulo 4
+ which it will be when doing the rte */
adjust_stack:
/* Prepare to skip over the extra stuff in the exception frame. */
if (regs->stkadj) {
struct pt_regs *tregs =
(struct pt_regs *)((ulong)regs + regs->stkadj);
-#if DEBUG
+#if defined(DEBUG)
printk(KERN_DEBUG "Performing stackadjust=%04x\n", regs->stkadj);
#endif
/* This must be copied with decreasing addresses to
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;
if (ka->sa.sa_flags & SA_ONESHOT)
ka->sa.sa_handler = SIG_DFL;
- if (!(ka->sa.sa_flags & SA_NODEFER)) {
- spin_lock_irq(¤t->sighand->siglock);
- sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask);
+ spin_lock_irq(¤t->sighand->siglock);
+ sigorsets(¤t->blocked,¤t->blocked,&ka->sa.sa_mask);
+ if (!(ka->sa.sa_flags & SA_NODEFER))
sigaddset(¤t->blocked,sig);
- recalc_sigpending();
- spin_unlock_irq(¤t->sighand->siglock);
- }
+ recalc_sigpending();
+ spin_unlock_irq(¤t->sighand->siglock);
}
/*
/* Did we come from a system call? */
if (regs->orig_d0 >= 0) {
/* Restart the system call - no handlers present */
- if (regs->d0 == -ERESTARTNOHAND
- || regs->d0 == -ERESTARTSYS
- || regs->d0 == -ERESTARTNOINTR) {
- regs->d0 = regs->orig_d0;
- regs->pc -= 2;
- } else if (regs->d0 == -ERESTART_RESTARTBLOCK) {
- regs->d0 = __NR_restart_syscall;
- regs->pc -= 2;
- }
+ handle_restart(regs, NULL, 0);
}
return 0;
}