cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

signal.h (2428B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _ASM_X86_SIGNAL_H
      3#define _ASM_X86_SIGNAL_H
      4
      5#ifndef __ASSEMBLY__
      6#include <linux/linkage.h>
      7
      8/* Most things should be clean enough to redefine this at will, if care
      9   is taken to make libc match.  */
     10
     11#define _NSIG		64
     12
     13#ifdef __i386__
     14# define _NSIG_BPW	32
     15#else
     16# define _NSIG_BPW	64
     17#endif
     18
     19#define _NSIG_WORDS	(_NSIG / _NSIG_BPW)
     20
     21typedef unsigned long old_sigset_t;		/* at least 32 bits */
     22
     23typedef struct {
     24	unsigned long sig[_NSIG_WORDS];
     25} sigset_t;
     26
     27/* non-uapi in-kernel SA_FLAGS for those indicates ABI for a signal frame */
     28#define SA_IA32_ABI	0x02000000u
     29#define SA_X32_ABI	0x01000000u
     30
     31#ifndef CONFIG_COMPAT
     32#define compat_sigset_t compat_sigset_t
     33typedef sigset_t compat_sigset_t;
     34#endif
     35
     36#endif /* __ASSEMBLY__ */
     37#include <uapi/asm/signal.h>
     38#ifndef __ASSEMBLY__
     39
     40#define __ARCH_HAS_SA_RESTORER
     41
     42#include <asm/asm.h>
     43#include <uapi/asm/sigcontext.h>
     44
     45#ifdef __i386__
     46
     47#define __HAVE_ARCH_SIG_BITOPS
     48
     49#define sigaddset(set,sig)		    \
     50	(__builtin_constant_p(sig)	    \
     51	 ? __const_sigaddset((set), (sig))  \
     52	 : __gen_sigaddset((set), (sig)))
     53
     54static inline void __gen_sigaddset(sigset_t *set, int _sig)
     55{
     56	asm("btsl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
     57}
     58
     59static inline void __const_sigaddset(sigset_t *set, int _sig)
     60{
     61	unsigned long sig = _sig - 1;
     62	set->sig[sig / _NSIG_BPW] |= 1 << (sig % _NSIG_BPW);
     63}
     64
     65#define sigdelset(set, sig)		    \
     66	(__builtin_constant_p(sig)	    \
     67	 ? __const_sigdelset((set), (sig))  \
     68	 : __gen_sigdelset((set), (sig)))
     69
     70
     71static inline void __gen_sigdelset(sigset_t *set, int _sig)
     72{
     73	asm("btrl %1,%0" : "+m"(*set) : "Ir"(_sig - 1) : "cc");
     74}
     75
     76static inline void __const_sigdelset(sigset_t *set, int _sig)
     77{
     78	unsigned long sig = _sig - 1;
     79	set->sig[sig / _NSIG_BPW] &= ~(1 << (sig % _NSIG_BPW));
     80}
     81
     82static inline int __const_sigismember(sigset_t *set, int _sig)
     83{
     84	unsigned long sig = _sig - 1;
     85	return 1 & (set->sig[sig / _NSIG_BPW] >> (sig % _NSIG_BPW));
     86}
     87
     88static inline int __gen_sigismember(sigset_t *set, int _sig)
     89{
     90	bool ret;
     91	asm("btl %2,%1" CC_SET(c)
     92	    : CC_OUT(c) (ret) : "m"(*set), "Ir"(_sig-1));
     93	return ret;
     94}
     95
     96#define sigismember(set, sig)			\
     97	(__builtin_constant_p(sig)		\
     98	 ? __const_sigismember((set), (sig))	\
     99	 : __gen_sigismember((set), (sig)))
    100
    101struct pt_regs;
    102
    103#else /* __i386__ */
    104
    105#undef __HAVE_ARCH_SIG_BITOPS
    106
    107#endif /* !__i386__ */
    108
    109#endif /* __ASSEMBLY__ */
    110#endif /* _ASM_X86_SIGNAL_H */