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score: 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 03:43:28 -05:00
parent 0aa0203fb4
commit b774cc5cb6
4 changed files with 3 additions and 25 deletions
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1
arch/score/Kconfig
View File

@ -14,6 +14,7 @@ config SCORE
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_REL
select CLONE_BACKWARDS
select GENERIC_SIGALTSTACK
choice
prompt "System type"

1
arch/score/include/asm/syscalls.h
View File

@ -1,7 +1,6 @@
#ifndef _ASM_SCORE_SYSCALLS_H
#define _ASM_SCORE_SYSCALLS_H
asmlinkage long score_sigaltstack(struct pt_regs *regs);
asmlinkage long score_rt_sigreturn(struct pt_regs *regs);
#include <asm-generic/syscalls.h>

5
arch/score/kernel/entry.S
View File

@ -491,8 +491,3 @@ ENTRY(sys_rt_sigreturn)
mv r4, r0
la r8, score_rt_sigreturn
br r8
ENTRY(sys_sigaltstack)
mv r4, r0
la r8, score_sigaltstack
br r8

21
arch/score/kernel/signal.c
View File

@ -133,16 +133,6 @@ static void __user *get_sigframe(struct k_sigaction *ka,
return (void __user*)((sp - frame_size) & ~7);
}
asmlinkage long
score_sigaltstack(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[0];
return do_sigaltstack(uss, uoss, usp);
}
asmlinkage long
score_rt_sigreturn(struct pt_regs *regs)
{
@ -167,9 +157,7 @@ score_rt_sigreturn(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. */
if (do_sigaltstack(&frame->rs_uc.uc_stack, NULL, regs->regs[0]) == -EFAULT)
if (restore_altstack(&frame->rs_uc.uc_stack))
goto badframe;
regs->is_syscall = 0;
@ -209,12 +197,7 @@ static int setup_rt_frame(struct k_sigaction *ka, struct pt_regs *regs,
err |= copy_siginfo_to_user(&frame->rs_info, info);
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[0]),
&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[0]);
err |= setup_sigcontext(regs, &frame->rs_uc.uc_mcontext);
err |= __copy_to_user(&frame->rs_uc.uc_sigmask, set, sizeof(*set));