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unicore32: switch to generic sigaltstack 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-12-23 03:52:33 -05:00
parent 0aa0203fb4
commit 50b3c9e30a
3 changed files with 3 additions and 15 deletions
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1
arch/unicore32/Kconfig
View File

@ -16,6 +16,7 @@ config UNICORE32
select ARCH_WANT_FRAME_POINTERS
select GENERIC_IOMAP
select MODULES_USE_ELF_REL
select GENERIC_SIGALTSTACK
help
UniCore-32 is 32-bit Instruction Set Architecture,
including a series of low-power-consumption RISC chip

5
arch/unicore32/kernel/entry.S
View File

@ -674,11 +674,6 @@ ENTRY(sys_rt_sigreturn)
b __sys_rt_sigreturn
ENDPROC(sys_rt_sigreturn)
ENTRY(sys_sigaltstack)
ldw r2, [sp+], #S_OFF + S_SP
b do_sigaltstack
ENDPROC(sys_sigaltstack)
__INIT
/*

12
arch/unicore32/kernel/signal.c
View File

@ -123,8 +123,7 @@ asmlinkage int __sys_rt_sigreturn(struct pt_regs *regs)
if (restore_sigframe(regs, &frame->sig))
goto badframe;
if (do_sigaltstack(&frame->sig.uc.uc_stack, NULL, regs->UCreg_sp)
== -EFAULT)
if (restore_altstack(&frame->sig.uc.uc_stack))
goto badframe;
return regs->UCreg_00;
@ -265,7 +264,6 @@ static int setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
{
struct rt_sigframe __user *frame =
get_sigframe(ka, regs, sizeof(*frame));
stack_t stack;
int err = 0;
if (!frame)
@ -275,13 +273,7 @@ static int setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info,
err |= __put_user(0, &frame->sig.uc.uc_flags);
err |= __put_user(NULL, &frame->sig.uc.uc_link);
memset(&stack, 0, sizeof(stack));
stack.ss_sp = (void __user *)current->sas_ss_sp;
stack.ss_flags = sas_ss_flags(regs->UCreg_sp);
stack.ss_size = current->sas_ss_size;
err |= __copy_to_user(&frame->sig.uc.uc_stack, &stack, sizeof(stack));
err |= __save_altstack(&frame->sig.uc.uc_stack, regs->UCreg_sp);
err |= setup_sigframe(&frame->sig, regs, set);
if (err == 0)
err |= setup_return(regs, ka, frame->sig.retcode, frame, usig);