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mips: 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 03:13:40 -05:00
parent c6489c147d
commit ea536ad4f2
7 changed files with 20 additions and 127 deletions
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21
arch/mips/kernel/signal.c
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@@ -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));