Viewing file:  signal.h (2.37 KB) -rw-r--r--
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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_X86_SIGNAL_H
#define _ASM_X86_SIGNAL_H
#ifndef __ASSEMBLY__
#include <linux/linkage.h>
/* Most things should be clean enough to redefine this at will, if care
is taken to make libc match. */
#define _NSIG 64
#ifdef __i386__
# define _NSIG_BPW 32
#else
# define _NSIG_BPW 64
#endif
#define _NSIG_WORDS (_NSIG / _NSIG_BPW)
typedef unsigned long old_sigset_t; /* at least 32 bits */
typedef struct {
unsigned long sig[_NSIG_WORDS];
} sigset_t;
/* non-uapi in-kernel SA_FLAGS for those indicates ABI for a signal frame */
#define SA_IA32_ABI 0x02000000u
#define SA_X32_ABI 0x01000000u
#ifndef CONFIG_COMPAT
#define compat_sigset_t compat_sigset_t
typedef sigset_t compat_sigset_t;
#endif
#endif /* __ASSEMBLY__ */
#include <uapi/asm/signal.h>
#ifndef __ASSEMBLY__
#define __ARCH_HAS_SA_RESTORER
#include <asm/asm.h>
#include <uapi/asm/sigcontext.h>
#ifdef __i386__
#define __HAVE_ARCH_SIG_BITOPS
#define sigaddset(set,sig) \
(__builtin_constant_p(sig) \
? __const_sigaddset((set), (sig)) \
: __gen_sigaddset((set), (sig)))
static inline void __gen_sigaddset(sigset_t *set, int _sig)
{
asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
}
static inline void __const_sigaddset(sigset_t *set, int _sig)
{
unsigned long sig = _sig - 1;
set->sig[sig / _NSIG_BPW] |= 1 << (sig % _NSIG_BPW);
}
#define sigdelset(set, sig) \
(__builtin_constant_p(sig) \
? __const_sigdelset((set), (sig)) \
: __gen_sigdelset((set), (sig)))
static inline void __gen_sigdelset(sigset_t *set, int _sig)
{
asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
}
static inline void __const_sigdelset(sigset_t *set, int _sig)
{
unsigned long sig = _sig - 1;
set->sig[sig / _NSIG_BPW] &= ~(1 << (sig % _NSIG_BPW));
}
static inline int __const_sigismember(sigset_t *set, int _sig)
{
unsigned long sig = _sig - 1;
return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
}
static inline int __gen_sigismember(sigset_t *set, int _sig)
{
bool ret;
asm("btl %2,%1" CC_SET(c)
: CC_OUT(c) (ret) : "m"(*set), "Ir"(_sig-1));
return ret;
}
#define sigismember(set, sig) \
(__builtin_constant_p(sig) \
? __const_sigismember((set), (sig)) \
: __gen_sigismember((set), (sig)))
struct pt_regs;
#else /* __i386__ */
#undef __HAVE_ARCH_SIG_BITOPS
#endif /* !__i386__ */
#endif /* __ASSEMBLY__ */
#endif /* _ASM_X86_SIGNAL_H */
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