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openrisc: switch to generic sigaltstack 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-12-23 03:19:49 -05:00
parent 0aa0203fb4
commit faec5a96a0
3 changed files with 3 additions and 17 deletions
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1
arch/openrisc/Kconfig
View File

@ -22,6 +22,7 @@ config OPENRISC
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
select MODULES_USE_ELF_RELA
select GENERIC_SIGALTSTACK
config MMU
def_bool y

4
arch/openrisc/kernel/entry.S
View File

@ -1083,10 +1083,6 @@ ENTRY(__sys_fork)
l.j _fork_save_extra_regs_and_call
l.addi r3,r1,0
ENTRY(sys_sigaltstack)
l.j _sys_sigaltstack
l.addi r5,r1,0
ENTRY(sys_rt_sigreturn)
l.j _sys_rt_sigreturn
l.addi r3,r1,0

15
arch/openrisc/kernel/signal.c
View File

@ -33,12 +33,6 @@
#define DEBUG_SIG 0
asmlinkage long
_sys_sigaltstack(const stack_t *uss, stack_t *uoss, struct pt_regs *regs)
{
return do_sigaltstack(uss, uoss, regs->sp);
}
struct rt_sigframe {
struct siginfo *pinfo;
void *puc;
@ -103,9 +97,7 @@ asmlinkage long _sys_rt_sigreturn(struct pt_regs *regs)
if (restore_sigcontext(regs, &frame->uc.uc_mcontext))
goto badframe;
/* It is more difficult to avoid calling this function than to
call it and ignore errors. */
if (do_sigaltstack(&frame->uc.uc_stack, NULL, regs->sp) == -EFAULT)
if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return regs->gpr[11];
@ -205,10 +197,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
err |= __clear_user(&frame->uc, offsetof(struct ucontext, uc_mcontext));
err |= __put_user(0, &frame->uc.uc_flags);
err |= __put_user(NULL, &frame->uc.uc_link);
err |= __put_user((void *)current->sas_ss_sp,
&frame->uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(regs->sp), &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->sp);
err |= setup_sigcontext(&frame->uc.uc_mcontext, regs, set->sig[0]);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));