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Commit	Line	Data
984263bc MD	1	/*-
	2	* Copyright (c) 1982, 1988, 1991 The Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
2c64e990	13	* 3. Neither the name of the University nor the names of its contributors
984263bc MD	14	* may be used to endorse or promote products derived from this software
	15	* without specific prior written permission.
	16	*
	17	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	18	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	19	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	20	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	21	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	22	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	23	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	24	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	25	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	26	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	27	* SUCH DAMAGE.
	28	*
	29	* $FreeBSD: src/sys/sys/sysent.h,v 1.27.2.5 2002/03/17 11:08:38 alfred Exp $
	30	*/
	31
	32	#ifndef _SYS_SYSENT_H_
	33	#define _SYS_SYSENT_H_
	34
1bd40720 MD	35	#ifndef _SYS_TYPES_H_
	36	#include <sys/types.h>
	37	#endif
	38
7d20a8ff	39	struct lwp;
80d831e1	40	struct sysmsg;
984263bc	41
80d831e1	42	typedef int sy_call_t (struct sysmsg sysmsg, const void );
984263bc MD	43
984263bc MD	44	struct sysent { /* system call table */
0807c4ed MD	45	int32_t sy_narg; /* number of arguments */
0807c4ed MD	46	uint32_t sy_rsize; /* sizeof(result) */
1fa2b4b4 MD	47	sy_call_t sy_call; / start function */
1fa2b4b4 MD	48	sy_call_t sy_abort; / abort function (only if start was async) */
984263bc MD	49	};
984263bc MD	50
984263bc MD	51	struct image_params;
	52	struct __sigset;
	53	struct trapframe;
	54	struct vnode;
	55
	56	struct sysentvec {
	57	int sv_size; /* number of entries */
	58	struct sysent sv_table; / pointer to sysent */
984263bc MD	59	int sv_sigsize; /* size of signal translation table */
	60	int sv_sigtbl; / signal translation table */
	61	int sv_errsize; /* size of errno translation table */
	62	int sv_errtbl; / errno translation table */
b153f746	63	int (*sv_transtrap) (int, int);
984263bc	64	/* translate trap-to-signal mapping */
b153f746	65	int (sv_fixup) (register_t , struct image_params );
984263bc	66	/* stack fixup function */
b153f746 RG	67	void (sv_sendsig) (void ()(int), int,
b153f746 RG	68	struct __sigset *, u_long);
984263bc MD	69	/* send signal */
	70	char sv_sigcode; / start of sigtramp code */
	71	int sv_szsigcode; / size of sigtramp code */
270ac911	72	/* prep syscall (must be MPSAFE) */
984263bc	73	char sv_name; / name of binary type */
7d20a8ff	74	int (sv_coredump) (struct lwp , int, struct vnode *,
b153f746	75	off_t);
984263bc	76	/* function to dump core, or NULL */
b153f746	77	int (sv_imgact_try) (struct image_params );
984263bc MD	78	int sv_minsigstksz; /* minimum signal stack size */
	79	};
	80
	81	#ifdef _KERNEL
984263bc MD	82	extern struct sysent sysent[];
	83
	84	#define NO_SYSCALL (-1)
	85
	86	struct module;
	87
	88	struct syscall_module_data {
	89	int (chainevh)(struct module , int, void ); / next handler */
	90	void chainarg; / arg for next event handler */
	91	int offset; / offset into sysent */
	92	struct sysent new_sysent; / new sysent */
	93	struct sysent old_sysent; /* old sysent */
	94	};
	95
	96	#define SYSCALL_MODULE(name, offset, new_sysent, evh, arg) \
	97	static struct syscall_module_data name##_syscall_mod = { \
	98	evh, arg, offset, new_sysent, { 0, NULL } \
	99	}; \
	100	\
	101	static moduledata_t name##_mod = { \
	102	#name, \
	103	syscall_module_handler, \
	104	&name##_syscall_mod \
	105	}; \
	106	DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
	107
	108	#define SYSCALL_MODULE_HELPER(syscallname) \
	109	static int syscallname##_syscall = SYS_##syscallname; \
	110	static struct sysent syscallname##_sysent = { \
f9a13fc4 MD	111	((sizeof(struct syscallname ## _args ) - sizeof(struct sysmsg)) \
f9a13fc4 MD	112	/ sizeof(register_t)), \
984263bc MD	113	(sy_call_t *)& syscallname \
	114	}; \
	115	SYSCALL_MODULE(syscallname, \
	116	& syscallname##_syscall, & syscallname##_sysent, \
	117	NULL, NULL);
	118
b153f746 RG	119	int syscall_register (int offset, struct sysent new_sysent,
	120	struct sysent *old_sysent);
	121	int syscall_deregister (int offset, struct sysent old_sysent);
	122	int syscall_module_handler (struct module mod, int what, void arg);
984263bc MD	123
	124	#endif /* _KERNEL */
	125
	126	#endif /* !_SYS_SYSENT_H_ */