/*-
* Copyright (c) 1982, 1988, 1991 The Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _SYS_SYSENT_H_
#define _SYS_SYSENT_H_
struct thread;
typedef int sy_call_t(struct thread *, void *);
struct sysent { /* system call table */
int sy_narg; /* number of arguments */
sy_call_t *sy_call; /* implementing function */
};
#define SYF_ARGMASK 0x0000FFFF
#define SYF_MPSAFE 0x00010000
#define SCARG(p,k) ((p)->k) /* get arg from args pointer */
/* placeholder till we integrate rest of lite2 syscallargs changes XXX */
struct image_params;
struct __sigset;
struct trapframe;
struct vnode;
struct sysentvec {
int sv_size; /* number of entries */
struct sysent *sv_table; /* pointer to sysent */
u_int sv_mask; /* optional mask to index */
int sv_sigsize; /* size of signal translation table */
int *sv_sigtbl; /* signal translation table */
int sv_errsize; /* size of errno translation table */
int *sv_errtbl; /* errno translation table */
int (*sv_transtrap)(int, int);
/* translate trap-to-signal mapping */
int (*sv_fixup)(register_t **, struct image_params *);
/* stack fixup function */
void (*sv_sendsig)(void (*)(int), int, struct __sigset *,
u_long); /* send signal */
char *sv_sigcode; /* start of sigtramp code */
int *sv_szsigcode; /* size of sigtramp code */
void (*sv_prepsyscall)(struct trapframe *, int *, u_int *,
caddr_t *);
char *sv_name; /* name of binary type */
int (*sv_coredump)(struct thread *, struct vnode *, off_t);
/* function to dump core, or NULL */
int (*sv_imgact_try)(struct image_params *);
int sv_minsigstksz; /* minimum signal stack size */
int sv_pagesize; /* pagesize */
vm_offset_t sv_minuser; /* VM_MIN_ADDRESS */
vm_offset_t sv_maxuser; /* VM_MAXUSER_ADDRESS */
vm_offset_t sv_usrstack; /* USRSTACK */
vm_offset_t sv_psstrings; /* PS_STRINGS */
int sv_stackprot; /* vm protection for stack */
register_t *(*sv_copyout_strings)(struct image_params *);
void (*sv_setregs)(struct thread *, u_long, u_long, u_long);
};
#ifdef _KERNEL
extern struct sysentvec aout_sysvec;
extern struct sysentvec elf_freebsd_sysvec;
extern struct sysentvec null_sysvec;
extern struct sysent sysent[];
#define NO_SYSCALL (-1)
struct module;
struct syscall_module_data {
int (*chainevh)(struct module *, int, void *); /* next handler */
void *chainarg; /* arg for next event handler */
int *offset; /* offset into sysent */
struct sysent *new_sysent; /* new sysent */
struct sysent old_sysent; /* old sysent */
};
#define SYSCALL_MODULE(name, offset, new_sysent, evh, arg) \
static struct syscall_module_data name##_syscall_mod = { \
evh, arg, offset, new_sysent, { 0, NULL } \
}; \
\
static moduledata_t name##_mod = { \
#name, \
syscall_module_handler, \
&name##_syscall_mod \
}; \
DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
#define SYSCALL_MODULE_HELPER(syscallname) \
static int syscallname##_syscall = SYS_##syscallname; \
static struct sysent syscallname##_sysent = { \
(sizeof(struct syscallname ## _args ) \
/ sizeof(register_t)), \
(sy_call_t *)& syscallname \
}; \
SYSCALL_MODULE(syscallname, \
& syscallname##_syscall, & syscallname##_sysent, \
NULL, NULL);
int syscall_register(int *offset, struct sysent *new_sysent,
struct sysent *old_sysent);
int syscall_deregister(int *offset, struct sysent *old_sysent);
int syscall_module_handler(struct module *mod, int what, void *arg);
#endif /* _KERNEL */
#endif /* !_SYS_SYSENT_H_ */
