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microblaze: switch to generic sigaltstack 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-12-23 03:08:53 -05:00
parent 0aa0203fb4
commit 4a9d32d377
2 changed files with 3 additions and 15 deletions
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1
arch/microblaze/Kconfig
View File

@ -27,6 +27,7 @@ config MICROBLAZE
select GENERIC_CLOCKEVENTS
select MODULES_USE_ELF_RELA
select CLONE_BACKWARDS
select GENERIC_SIGALTSTACK
config SWAP
def_bool n

17
arch/microblaze/kernel/signal.c
View File

@ -41,13 +41,6 @@
#include <asm/cacheflush.h>
#include <asm/syscalls.h>
asmlinkage long
sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
struct pt_regs *regs)
{
return do_sigaltstack(uss, uoss, regs->r1);
}
/*
* Do a signal return; undo the signal stack.
*/
@ -109,9 +102,7 @@ asmlinkage long sys_rt_sigreturn(struct pt_regs *regs)
if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &rval))
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->r1) == -EFAULT)
if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return rval;
@ -194,11 +185,7 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
/* Create the ucontext. */
err |= __put_user(0, &frame->uc.uc_flags);
err |= __put_user(NULL, &frame->uc.uc_link);
err |= __put_user((void __user *)current->sas_ss_sp,
&frame->uc.uc_stack.ss_sp);
err |= __put_user(sas_ss_flags(regs->r1),
&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->r1);
err |= setup_sigcontext(&frame->uc.uc_mcontext,
regs, set->sig[0]);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));