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powerpc: switch to generic old sigaction()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-12-25 19:27:42 -05:00
parent 5aa1cde2ed
commit 09a4d5d015
4 changed files with 3 additions and 75 deletions
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2
arch/powerpc/Kconfig
View File

@ -150,6 +150,7 @@ config PPC
select GENERIC_COMPAT_RT_SIGPROCMASK select GENERIC_COMPAT_RT_SIGPROCMASK
select GENERIC_COMPAT_RT_SIGPENDING select GENERIC_COMPAT_RT_SIGPENDING
select OLD_SIGSUSPEND select OLD_SIGSUSPEND
select OLD_SIGACTION if PPC32
config EARLY_PRINTK config EARLY_PRINTK
bool bool
@ -160,6 +161,7 @@ config COMPAT
default y if PPC64 default y if PPC64
select COMPAT_BINFMT_ELF select COMPAT_BINFMT_ELF
select ARCH_WANT_OLD_COMPAT_IPC select ARCH_WANT_OLD_COMPAT_IPC
select COMPAT_OLD_SIGACTION
config SYSVIPC_COMPAT config SYSVIPC_COMPAT
bool bool

2
arch/powerpc/include/uapi/asm/signal.h
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@ -90,6 +90,7 @@ typedef struct {
#include <asm-generic/signal-defs.h> #include <asm-generic/signal-defs.h>
#ifndef __KERNEL__
struct old_sigaction { struct old_sigaction {
__sighandler_t sa_handler; __sighandler_t sa_handler;
old_sigset_t sa_mask; old_sigset_t sa_mask;
@ -97,7 +98,6 @@ struct old_sigaction {
__sigrestore_t sa_restorer; __sigrestore_t sa_restorer;
}; };
#ifndef __KERNEL__
struct sigaction { struct sigaction {
__sighandler_t sa_handler; __sighandler_t sa_handler;
unsigned long sa_flags; unsigned long sa_flags;

9
arch/powerpc/kernel/ppc32.h
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@ -16,15 +16,6 @@
/* These are here to support 32-bit syscalls on a 64-bit kernel. */ /* These are here to support 32-bit syscalls on a 64-bit kernel. */
#define __old_sigaction32 old_sigaction32
struct __old_sigaction32 {
compat_uptr_t sa_handler;
compat_old_sigset_t sa_mask;
unsigned int sa_flags;
compat_uptr_t sa_restorer; /* not used by Linux/SPARC yet */
};
struct pt_regs32 { struct pt_regs32 {
unsigned int gpr[32]; unsigned int gpr[32];
unsigned int nip; unsigned int nip;

65
arch/powerpc/kernel/signal_32.c
View File

@ -57,7 +57,6 @@
#ifdef CONFIG_PPC64 #ifdef CONFIG_PPC64
#define sys_rt_sigreturn compat_sys_rt_sigreturn #define sys_rt_sigreturn compat_sys_rt_sigreturn
#define sys_sigaction compat_sys_sigaction
#define sys_swapcontext compat_sys_swapcontext #define sys_swapcontext compat_sys_swapcontext
#define sys_sigreturn compat_sys_sigreturn #define sys_sigreturn compat_sys_sigreturn
@ -130,23 +129,6 @@ static inline int get_sigset_t(sigset_t *set,
return 0; return 0;
} }
static inline int get_old_sigaction(struct k_sigaction *new_ka,
struct old_sigaction __user *act)
{
compat_old_sigset_t mask;
compat_uptr_t handler, restorer;
if (get_user(handler, &act->sa_handler) ||
__get_user(restorer, &act->sa_restorer) ||
__get_user(new_ka->sa.sa_flags, &act->sa_flags) ||
__get_user(mask, &act->sa_mask))
return -EFAULT;
new_ka->sa.sa_handler = compat_ptr(handler);
new_ka->sa.sa_restorer = compat_ptr(restorer);
siginitset(&new_ka->sa.sa_mask, mask);
return 0;
}
#define to_user_ptr(p) ptr_to_compat(p) #define to_user_ptr(p) ptr_to_compat(p)
#define from_user_ptr(p) compat_ptr(p) #define from_user_ptr(p) compat_ptr(p)
@ -196,21 +178,6 @@ static inline int get_sigset_t(sigset_t *set, const sigset_t __user *uset)
return copy_from_user(set, uset, sizeof(*uset)); return copy_from_user(set, uset, sizeof(*uset));
} }
static inline int get_old_sigaction(struct k_sigaction *new_ka,
struct old_sigaction __user *act)
{
old_sigset_t mask;
if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
__get_user(new_ka->sa.sa_handler, &act->sa_handler) ||
__get_user(new_ka->sa.sa_restorer, &act->sa_restorer) ||
__get_user(new_ka->sa.sa_flags, &act->sa_flags) ||
__get_user(mask, &act->sa_mask))
return -EFAULT;
siginitset(&new_ka->sa.sa_mask, mask);
return 0;
}
#define to_user_ptr(p) ((unsigned long)(p)) #define to_user_ptr(p) ((unsigned long)(p))
#define from_user_ptr(p) ((void __user *)(p)) #define from_user_ptr(p) ((void __user *)(p))
@ -234,40 +201,8 @@ static inline int restore_general_regs(struct pt_regs *regs,
return -EFAULT; return -EFAULT;
return 0; return 0;
} }
#endif /* CONFIG_PPC64 */
long sys_sigaction(int sig, struct old_sigaction __user *act,
struct old_sigaction __user *oact)
{
struct k_sigaction new_ka, old_ka;
int ret;
#ifdef CONFIG_PPC64
if (sig < 0)
sig = -sig;
#endif #endif
if (act) {
if (get_old_sigaction(&new_ka, act))
return -EFAULT;
}
ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
if (!ret && oact) {
if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
__put_user(to_user_ptr(old_ka.sa.sa_handler),
&oact->sa_handler) ||
__put_user(to_user_ptr(old_ka.sa.sa_restorer),
&oact->sa_restorer) ||
__put_user(old_ka.sa.sa_flags, &oact->sa_flags) ||
__put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask))
return -EFAULT;
}
return ret;
}
/* /*
* When we have signals to deliver, we set up on the * When we have signals to deliver, we set up on the
* user stack, going down from the original stack pointer: * user stack, going down from the original stack pointer: