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authorAl Viro <viro@zeniv.linux.org.uk>2012-12-23 03:46:05 -0500
committerAl Viro <viro@zeniv.linux.org.uk>2013-02-03 18:16:15 -0500
commit7a879a94d90dc5c494875b54499ae321400358d8 (patch)
tree677856f295ab1b41239a383c688ea67850638512
parent0aa0203fb43f04714004b2c4ad33b858e240555d (diff)
downloadop-kernel-dev-7a879a94d90dc5c494875b54499ae321400358d8.zip
op-kernel-dev-7a879a94d90dc5c494875b54499ae321400358d8.tar.gz
sh: switch to generic sigaltstack
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--arch/sh/Kconfig1
-rw-r--r--arch/sh/include/asm/syscalls_32.h3
-rw-r--r--arch/sh/kernel/signal_32.c20
-rw-r--r--arch/sh/kernel/signal_64.c19
4 files changed, 5 insertions, 38 deletions
diff --git a/arch/sh/Kconfig b/arch/sh/Kconfig
index babc2b8..fb4a212c 100644
--- a/arch/sh/Kconfig
+++ b/arch/sh/Kconfig
@@ -40,6 +40,7 @@ config SUPERH
select GENERIC_STRNLEN_USER
select HAVE_MOD_ARCH_SPECIFIC if DWARF_UNWINDER
select MODULES_USE_ELF_RELA
+ select GENERIC_SIGALTSTACK
help
The SuperH is a RISC processor targeted for use in embedded systems
and consumer electronics; it was also used in the Sega Dreamcast
diff --git a/arch/sh/include/asm/syscalls_32.h b/arch/sh/include/asm/syscalls_32.h
index cc25485..77e2054 100644
--- a/arch/sh/include/asm/syscalls_32.h
+++ b/arch/sh/include/asm/syscalls_32.h
@@ -12,9 +12,6 @@ struct pt_regs;
asmlinkage int sys_sigsuspend(old_sigset_t mask);
asmlinkage int sys_sigaction(int sig, const struct old_sigaction __user *act,
struct old_sigaction __user *oact);
-asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
- unsigned long r6, unsigned long r7,
- struct pt_regs __regs);
asmlinkage int sys_sigreturn(unsigned long r4, unsigned long r5,
unsigned long r6, unsigned long r7,
struct pt_regs __regs);
diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c
index 2f1f653..e540d07 100644
--- a/arch/sh/kernel/signal_32.c
+++ b/arch/sh/kernel/signal_32.c
@@ -89,17 +89,6 @@ sys_sigaction(int sig, const struct old_sigaction __user *act,
return ret;
}
-asmlinkage int
-sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
- unsigned long r6, unsigned long r7,
- struct pt_regs __regs)
-{
- struct pt_regs *regs = RELOC_HIDE(&__regs, 0);
-
- return do_sigaltstack(uss, uoss, regs->regs[15]);
-}
-
-
/*
* Do a signal return; undo the signal stack.
*/
@@ -257,8 +246,7 @@ asmlinkage int sys_rt_sigreturn(unsigned long r4, unsigned long r5,
if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &r0))
goto badframe;
- if (do_sigaltstack(&frame->uc.uc_stack, NULL,
- regs->regs[15]) == -EFAULT)
+ if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return r0;
@@ -423,11 +411,7 @@ 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 *)current->sas_ss_sp,
- &frame->uc.uc_stack.ss_sp);
- err |= __put_user(sas_ss_flags(regs->regs[15]),
- &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->regs[15]);
err |= setup_sigcontext(&frame->uc.uc_mcontext,
regs, set->sig[0]);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
diff --git a/arch/sh/kernel/signal_64.c b/arch/sh/kernel/signal_64.c
index d867cd9..0fba66e 100644
--- a/arch/sh/kernel/signal_64.c
+++ b/arch/sh/kernel/signal_64.c
@@ -170,15 +170,6 @@ sys_sigaction(int sig, const struct old_sigaction __user *act,
return ret;
}
-asmlinkage int
-sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
- unsigned long r4, unsigned long r5, unsigned long r6,
- unsigned long r7,
- struct pt_regs * regs)
-{
- return do_sigaltstack(uss, uoss, REF_REG_SP);
-}
-
/*
* Do a signal return; undo the signal stack.
*/
@@ -364,9 +355,7 @@ asmlinkage int sys_rt_sigreturn(unsigned long r2, unsigned long r3,
goto badframe;
regs->pc -= 4;
- /* It is more difficult to avoid calling this function than to
- call it and ignore errors. */
- if (do_sigaltstack(&frame->uc.uc_stack, NULL, REF_REG_SP) == -EFAULT)
+ if (restore_altstack(&frame->uc.uc_stack))
goto badframe;
return (int) ret;
@@ -560,11 +549,7 @@ 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(0, &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->regs[REG_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->regs[REG_SP]);
err |= setup_sigcontext(&frame->uc.uc_mcontext,
regs, set->sig[0]);
err |= __copy_to_user(&frame->uc.uc_sigmask, set, sizeof(*set));
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