sw64: add signal handling support

/* SPDX-License-Identifier: GPL-2.0 */

#ifndef _ASM_SW64_SIGNAL_H

#define _ASM_SW64_SIGNAL_H

#include <uapi/asm/signal.h>

/* Digital Unix defines 64 signals.  Most things should be clean enough

 * to redefine this at will, if care is taken to make libc match.

 */

#define _NSIG		64

#define _NSIG_BPW	64

#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;

struct odd_sigaction {

	__sighandler_t	sa_handler;

	old_sigset_t	sa_mask;

	int		sa_flags;

};

#include <asm/sigcontext.h>

#endif /* _ASM_SW64_SIGNAL_H */

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

#ifndef _UAPI_ASM_SW64_SIGCONTEXT_H

#define _UAPI_ASM_SW64_SIGCONTEXT_H

/*

 * Signal context structure

 *

 * The context is saved before a signal handler is invoked, and it is

 * restored by sys_sigreturn / sys_rt_sigreturn.

 */

struct sigcontext {

	long		sc_onstack;

	long		sc_mask;

	long		sc_pc;

	long		sc_ps;

	long		sc_regs[32];

	long		sc_ownedfp;

	long		sc_fpregs[128];	/* SIMD-FP */

	unsigned long	sc_fpcr;

	/* TODO: Following are unused, to be removed and synced with libc */

	unsigned long	sc_fp_control;

	unsigned long	sc_reserved1, sc_reserved2;

	unsigned long	sc_ssize;

	char		*sc_sbase;

	unsigned long	sc_traparg_a0;

	unsigned long	sc_traparg_a1;

	unsigned long	sc_traparg_a2;

	unsigned long	sc_fp_trap_pc;

	unsigned long	sc_fp_trigger_sum;

	unsigned long	sc_fp_trigger_inst;

};

#endif /* _UAPI_ASM_SW64_SIGCONTEXT_H */

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

#ifndef _UAPI_ASM_SW64_SIGINFO_H

#define _UAPI_ASM_SW64_SIGINFO_H

#define __ARCH_SI_PREAMBLE_SIZE		(4 * sizeof(int))

#include <asm-generic/siginfo.h>

#endif /* _UAPI_ASM_SW64_SIGINFO_H */

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

#ifndef _UAPI_ASM_SW64_SIGNAL_H

#define _UAPI_ASM_SW64_SIGNAL_H

#include <linux/types.h>

/* Avoid too many header ordering problems.  */

struct siginfo;

#ifndef __KERNEL__

/* Here we must cater to libcs that poke about in kernel headers.  */

#define NSIG		32

typedef unsigned long sigset_t;

#endif /* __KERNEL__ */

/*

 * Linux/sw64 different signal numbers that Linux/i386.

 */

#define SIGHUP		 1

#define SIGINT		 2

#define SIGQUIT		 3

#define SIGILL		 4

#define SIGTRAP		 5

#define SIGABRT		 6

#define SIGEMT		 7

#define SIGFPE		 8

#define SIGKILL		 9

#define SIGBUS		10

#define SIGSEGV		11

#define SIGSYS		12

#define SIGPIPE		13

#define SIGALRM		14

#define SIGTERM		15

#define SIGURG		16

#define SIGSTOP		17

#define SIGTSTP		18

#define SIGCONT		19

#define SIGCHLD		20

#define SIGTTIN		21

#define SIGTTOU		22

#define SIGIO		23

#define SIGXCPU		24

#define SIGXFSZ		25

#define SIGVTALRM	26

#define SIGPROF		27

#define SIGWINCH	28

#define SIGINFO		29

#define SIGUSR1		30

#define SIGUSR2		31

#define SIGPOLL		SIGIO

#define SIGPWR		SIGINFO

#define SIGIOT		SIGABRT

/* These should not be considered constants from userland.  */

#define SIGRTMIN	32

#define SIGRTMAX	_NSIG

/*

 * SA_FLAGS values:

 *

 * SA_ONSTACK indicates that a registered stack_t will be used.

 * SA_RESTART flag to get restarting signals (which were the default long ago)

 * SA_NOCLDSTOP flag to turn off SIGCHLD when children stop.

 * SA_RESETHAND clears the handler when the signal is delivered.

 * SA_NOCLDWAIT flag on SIGCHLD to inhibit zombies.

 * SA_NODEFER prevents the current signal from being masked in the handler.

 *

 * SA_ONESHOT and SA_NOMASK are the historical Linux names for the Single

 * Unix names RESETHAND and NODEFER respectively.

 */

#define SA_ONSTACK	0x00000001

#define SA_RESTART	0x00000002

#define SA_NOCLDSTOP	0x00000004

#define SA_NODEFER	0x00000008

#define SA_RESETHAND	0x00000010

#define SA_NOCLDWAIT	0x00000020

#define SA_SIGINFO	0x00000040

#define SA_ONESHOT	SA_RESETHAND

#define SA_NOMASK	SA_NODEFER

#define MINSIGSTKSZ	4096

#define SIGSTKSZ	16384

#define SIG_BLOCK	1	/* for blocking signals */

#define SIG_UNBLOCK	2	/* for unblocking signals */

#define SIG_SETMASK	3	/* for setting the signal mask */

#include <asm-generic/signal-defs.h>

#ifndef __KERNEL__

/* Here we must cater to libcs that poke about in kernel headers.  */

struct sigaction {

	union {

		__sighandler_t	_sa_handler;

		void (*_sa_sigaction)(int sig, struct siginfo *info, void *ucontext);

	} _u;

	sigset_t	sa_mask;

	int		sa_flags;

};

#define sa_handler	_u._sa_handler

#define sa_sigaction	_u._sa_sigaction

#endif /* __KERNEL__ */

typedef struct sigaltstack {

	void __user *ss_sp;

	int ss_flags;

	size_t ss_size;

} stack_t;

#endif /* _UAPI_ASM_SW64_SIGNAL_H */

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */

#ifndef _UAPI_ASM_SW64_UCONTEXT_H

#define _UAPI_ASM_SW64_UCONTEXT_H

struct ucontext {

	unsigned long		uc_flags;

	struct ucontext		*uc_link;

	old_sigset_t		uc_old_sigmask;

	stack_t			uc_stack;

	struct sigcontext	uc_mcontext;

	sigset_t		uc_sigmask;	/* mask last for extensibility */

};

#endif /* _UAPI_ASM_SW64_UCONTEXT_H */