diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-12-23 03:13:40 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-02-03 18:32:24 -0500 |
| commit | ea536ad4f231a0055792d9b144715605cbd670c1 (patch) | |
| tree | 31c7cd55f356cc80ba28b6e989e99af27fd2c567 /arch/mips/kernel/signal.c | |
| parent | c6489c147de592af4d0d1c5263e7b4f0e8e7d100 (diff) | |
mips: switch to generic sigaltstack
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/mips/kernel/signal.c')
| -rw-r--r-- | arch/mips/kernel/signal.c | 21 |
1 files changed, 3 insertions, 18 deletions
diff --git a/arch/mips/kernel/signal.c b/arch/mips/kernel/signal.c index 4d790d1f03d6..eab30865b2bd 100644 --- a/arch/mips/kernel/signal.c +++ b/arch/mips/kernel/signal.c @@ -313,15 +313,6 @@ SYSCALL_DEFINE3(sigaction, int, sig, const struct sigaction __user *, act, } #endif -asmlinkage int sys_sigaltstack(nabi_no_regargs struct pt_regs regs) -{ - const stack_t __user *uss = (const stack_t __user *) regs.regs[4]; - stack_t __user *uoss = (stack_t __user *) regs.regs[5]; - unsigned long usp = regs.regs[29]; - - return do_sigaltstack(uss, uoss, usp); -} - #ifdef CONFIG_TRAD_SIGNALS asmlinkage void sys_sigreturn(nabi_no_regargs struct pt_regs regs) { @@ -378,9 +369,8 @@ asmlinkage void sys_rt_sigreturn(nabi_no_regargs struct pt_regs regs) else if (sig) force_sig(sig, current); - /* It is more difficult to avoid calling this function than to - call it and ignore errors. */ - do_sigaltstack(&frame->rs_uc.uc_stack, NULL, regs.regs[29]); + if (restore_altstack(&frame->rs_uc.uc_stack)) + goto badframe; /* * Don't let your children do this ... @@ -457,12 +447,7 @@ static int setup_rt_frame(void *sig_return, struct k_sigaction *ka, /* Create the ucontext. */ err |= __put_user(0, &frame->rs_uc.uc_flags); err |= __put_user(NULL, &frame->rs_uc.uc_link); - err |= __put_user((void __user *)current->sas_ss_sp, - &frame->rs_uc.uc_stack.ss_sp); - err |= __put_user(sas_ss_flags(regs->regs[29]), - &frame->rs_uc.uc_stack.ss_flags); - err |= __put_user(current->sas_ss_size, - &frame->rs_uc.uc_stack.ss_size); + err |= __save_altstack(&frame->rs_uc.uc_stack, regs->regs[29]); err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext); err |= __copy_to_user(&frame->rs_uc.uc_sigmask, set, sizeof(*set)); |