score: switch to generic sigaltstack
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/score/Kconfig b/arch/score/Kconfig
index 3b1482e..a125d72 100644
--- a/arch/score/Kconfig
+++ b/arch/score/Kconfig
@@ -14,6 +14,7 @@
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_REL
select CLONE_BACKWARDS
+ select GENERIC_SIGALTSTACK
choice
prompt "System type"
diff --git a/arch/score/include/asm/syscalls.h b/arch/score/include/asm/syscalls.h
index acaeed6..98d1df9 100644
--- a/arch/score/include/asm/syscalls.h
+++ b/arch/score/include/asm/syscalls.h
@@ -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>
diff --git a/arch/score/kernel/entry.S b/arch/score/kernel/entry.S
index 1557ca1..7234ed0 100644
--- a/arch/score/kernel/entry.S
+++ b/arch/score/kernel/entry.S
@@ -491,8 +491,3 @@
mv r4, r0
la r8, score_rt_sigreturn
br r8
-
-ENTRY(sys_sigaltstack)
- mv r4, r0
- la r8, score_sigaltstack
- br r8
diff --git a/arch/score/kernel/signal.c b/arch/score/kernel/signal.c
index 02353bd..a00fba3 100644
--- a/arch/score/kernel/signal.c
+++ b/arch/score/kernel/signal.c
@@ -134,16 +134,6 @@
}
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)
{
struct rt_sigframe __user *frame;
@@ -167,9 +157,7 @@
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 @@
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));