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s390: switch to generic sigaltstack

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2012-12-23 03:36:41 -05:00
parent 0aa0203fb4
commit e214125aa8
7 changed files with 7 additions and 83 deletions
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15
arch/s390/kernel/signal.c
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@@ -89,13 +89,6 @@ SYSCALL_DEFINE3(sigaction, int, sig, const struct old_sigaction __user *, act,
return ret;
}
SYSCALL_DEFINE2(sigaltstack, const stack_t __user *, uss,
stack_t __user *, uoss)
{
struct pt_regs *regs = task_pt_regs(current);
return do_sigaltstack(uss, uoss, regs->gprs[15]);
}
/* Returns non-zero on fault. */
static int save_sigregs(struct pt_regs *regs, _sigregs __user *sregs)
{
@@ -190,8 +183,7 @@ SYSCALL_DEFINE0(rt_sigreturn)
set_current_blocked(&set);
if (restore_sigregs(regs, &frame->uc.uc_mcontext))
goto badframe;
if (do_sigaltstack(&frame->uc.uc_stack, NULL,
regs->gprs[15]) == -EFAULT)
if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return regs->gprs[2];
badframe:
@@ -325,10 +317,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
err |= __put_user(NULL, &frame->uc.uc_link);
err |= __put_user((void __user *)current->sas_ss_sp, &frame->uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(regs->gprs[15]),
&frame->uc.uc_stack.ss_flags);
err |= __put_user(current->sas_ss_size, &frame->uc.uc_stack.ss_size);
err |= __save_altstack(&frame->uc.uc_stack, regs->gprs[15]);
err |= save_sigregs(regs, &frame->uc.uc_mcontext);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
if (err)