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#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
 || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)

#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
#define MINSIGSTKSZ 6144
#define SIGSTKSZ 12288
#endif

#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
typedef unsigned long greg_t;
typedef unsigned long gregset_t[34];

typedef struct {
	long double vregs[32];
	unsigned int fpsr;
	unsigned int fpcr;
} fpregset_t;
typedef struct sigcontext {
	unsigned long fault_address;
	unsigned long regs[31];
	unsigned long sp, pc, pstate;
	long double __reserved[256];
} mcontext_t;

#define FPSIMD_MAGIC 0x46508001
#define ESR_MAGIC 0x45535201
struct _aarch64_ctx {
	unsigned int magic;
	unsigned int size;
};
struct fpsimd_context {
	struct _aarch64_ctx head;
	unsigned int fpsr;
	unsigned int fpcr;
	long double vregs[32];
};
struct esr_context {
	struct _aarch64_ctx head;
	unsigned long esr;
};
#else
typedef struct {
	long double __regs[18+256];
} mcontext_t;
#endif

struct sigaltstack {
	void *ss_sp;
	int ss_flags;
	size_t ss_size;
};

typedef struct __ucontext {
	unsigned long uc_flags;
	struct ucontext *uc_link;
	stack_t uc_stack;
	sigset_t uc_sigmask;
	mcontext_t uc_mcontext;
} ucontext_t;

#define SA_NOCLDSTOP  1
#define SA_NOCLDWAIT  2
#define SA_SIGINFO    4
#define SA_ONSTACK    0x08000000
#define SA_RESTART    0x10000000
#define SA_NODEFER    0x40000000
#define SA_RESETHAND  0x80000000
#define SA_RESTORER   0x04000000

#endif

#define SIGHUP    1
#define SIGINT    2
#define SIGQUIT   3
#define SIGILL    4
#define SIGTRAP   5
#define SIGABRT   6
#define SIGIOT    SIGABRT
#define SIGBUS    7
#define SIGFPE    8
#define SIGKILL   9
#define SIGUSR1   10
#define SIGSEGV   11
#define SIGUSR2   12
#define SIGPIPE   13
#define SIGALRM   14
#define SIGTERM   15
#define SIGSTKFLT 16
#define SIGCHLD   17
#define SIGCONT   18
#define SIGSTOP   19
#define SIGTSTP   20
#define SIGTTIN   21
#define SIGTTOU   22
#define SIGURG    23
#define SIGXCPU   24
#define SIGXFSZ   25
#define SIGVTALRM 26
#define SIGPROF   27
#define SIGWINCH  28
#define SIGIO     29
#define SIGPOLL   29
#define SIGPWR    30
#define SIGSYS    31
#define SIGUNUSED SIGSYS

#define _NSIG 65