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| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-12-23 01:52:54 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-02-03 18:15:46 -0500 |
| commit | ec93ac8663ad5fcccd44c3768b23c93b87610fc2 (patch) | |
| tree | 768f321442445310520b8c839c4228aaad1e4c1d | |
| parent | 0aa0203fb43f04714004b2c4ad33b858e240555d (diff) | |
| download | blackbird-obmc-linux-ec93ac8663ad5fcccd44c3768b23c93b87610fc2.tar.gz blackbird-obmc-linux-ec93ac8663ad5fcccd44c3768b23c93b87610fc2.zip | |
arm: switch to generic sigaltstack
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | arch/arm/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm/kernel/calls.S | 2 | ||||
| -rw-r--r-- | arch/arm/kernel/entry-common.S | 5 | ||||
| -rw-r--r-- | arch/arm/kernel/signal.c | 10 |
4 files changed, 4 insertions, 14 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 67874b82a4ed..caf0ba73ea38 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -56,6 +56,7 @@ config ARM select HAVE_MOD_ARCH_SPECIFIC if ARM_UNWIND select MODULES_USE_ELF_REL select CLONE_BACKWARDS + select GENERIC_SIGALTSTACK help The ARM series is a line of low-power-consumption RISC chip designs licensed by ARM Ltd and targeted at embedded applications and diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S index a4fda4e7a372..0cc57611fc4f 100644 --- a/arch/arm/kernel/calls.S +++ b/arch/arm/kernel/calls.S @@ -195,7 +195,7 @@ CALL(sys_getcwd) CALL(sys_capget) /* 185 */ CALL(sys_capset) - CALL(sys_sigaltstack_wrapper) + CALL(sys_sigaltstack) CALL(sys_sendfile) CALL(sys_ni_syscall) /* getpmsg */ CALL(sys_ni_syscall) /* putpmsg */ diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S index a6c301e90a3b..3248cde504ed 100644 --- a/arch/arm/kernel/entry-common.S +++ b/arch/arm/kernel/entry-common.S @@ -514,11 +514,6 @@ sys_rt_sigreturn_wrapper: b sys_rt_sigreturn ENDPROC(sys_rt_sigreturn_wrapper) -sys_sigaltstack_wrapper: - ldr r2, [sp, #S_OFF + S_SP] - b do_sigaltstack -ENDPROC(sys_sigaltstack_wrapper) - sys_statfs64_wrapper: teq r1, #88 moveq r1, #84 diff --git a/arch/arm/kernel/signal.c b/arch/arm/kernel/signal.c index 56f72d257ebd..f1f6d214050f 100644 --- a/arch/arm/kernel/signal.c +++ b/arch/arm/kernel/signal.c @@ -300,7 +300,7 @@ 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->ARM_sp) == -EFAULT) + if (restore_altstack(&frame->sig.uc.uc_stack)) goto badframe; return regs->ARM_r0; @@ -486,7 +486,6 @@ setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info, sigset_t *set, struct pt_regs *regs) { struct rt_sigframe __user *frame = get_sigframe(ka, regs, sizeof(*frame)); - stack_t stack; int err = 0; if (!frame) @@ -497,12 +496,7 @@ setup_rt_frame(int usig, struct k_sigaction *ka, siginfo_t *info, __put_user_error(0, &frame->sig.uc.uc_flags, err); __put_user_error(NULL, &frame->sig.uc.uc_link, err); - memset(&stack, 0, sizeof(stack)); - stack.ss_sp = (void __user *)current->sas_ss_sp; - stack.ss_flags = sas_ss_flags(regs->ARM_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->ARM_sp); err |= setup_sigframe(&frame->sig, regs, set); if (err == 0) err = setup_return(regs, ka, frame->sig.retcode, frame, usig); |
