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29 * $FreeBSD: src/sys/sys/sysent.h,v 1.27.2.5 2002/03/17 11:08:38 alfred Exp $
30 * $DragonFly: src/sys/sys/sysent.h,v 1.12 2007/02/21 15:45:37 corecode Exp $
33 #ifndef _SYS_SYSENT_H_
34 #define _SYS_SYSENT_H_
37 #include <sys/types.h>
42 typedef int sy_call_t (void *);
44 struct sysent
{ /* system call table */
45 int sy_narg
; /* number of arguments */
46 sy_call_t
*sy_call
; /* start function */
47 sy_call_t
*sy_abort
; /* abort function (only if start was async) */
50 #define SYF_ARGMASK 0x0000FFFF
52 #define SCARG(p,k) ((p)->k) /* get arg from args pointer */
53 /* placeholder till we integrate rest of lite2 syscallargs changes XXX */
61 int sv_size
; /* number of entries */
62 struct sysent
*sv_table
; /* pointer to sysent */
63 u_int sv_mask
; /* optional mask to index, else -1 */
64 int sv_sigsize
; /* size of signal translation table */
65 int *sv_sigtbl
; /* signal translation table */
66 int sv_errsize
; /* size of errno translation table */
67 int *sv_errtbl
; /* errno translation table */
68 int (*sv_transtrap
) (int, int);
69 /* translate trap-to-signal mapping */
70 int (*sv_fixup
) (register_t
**, struct image_params
*);
71 /* stack fixup function */
72 void (*sv_sendsig
) (void (*)(int), int,
73 struct __sigset
*, u_long
);
75 char *sv_sigcode
; /* start of sigtramp code */
76 int *sv_szsigcode
; /* size of sigtramp code */
77 /* prep syscall (must be MPSAFE) */
78 void (*sv_prepsyscall
) (struct trapframe
*, int *,
80 char *sv_name
; /* name of binary type */
81 int (*sv_coredump
) (struct lwp
*, int, struct vnode
*,
83 /* function to dump core, or NULL */
84 int (*sv_imgact_try
) (struct image_params
*);
85 int sv_minsigstksz
; /* minimum signal stack size */
89 extern struct sysentvec aout_sysvec
;
90 extern struct sysent sysent
[];
92 #define NO_SYSCALL (-1)
96 struct syscall_module_data
{
97 int (*chainevh
)(struct module
*, int, void *); /* next handler */
98 void *chainarg
; /* arg for next event handler */
99 int *offset
; /* offset into sysent */
100 struct sysent
*new_sysent
; /* new sysent */
101 struct sysent old_sysent
; /* old sysent */
104 #define SYSCALL_MODULE(name, offset, new_sysent, evh, arg) \
105 static struct syscall_module_data name##_syscall_mod = { \
106 evh, arg, offset, new_sysent, { 0, NULL } \
109 static moduledata_t name##_mod = { \
111 syscall_module_handler, \
112 &name##_syscall_mod \
114 DECLARE_MODULE(name, name##_mod, SI_SUB_DRIVERS, SI_ORDER_MIDDLE)
116 #define SYSCALL_MODULE_HELPER(syscallname) \
117 static int syscallname##_syscall = SYS_##syscallname; \
118 static struct sysent syscallname##_sysent = { \
119 ((sizeof(struct syscallname ## _args ) - sizeof(struct sysmsg)) \
120 / sizeof(register_t)), \
121 (sy_call_t *)& syscallname \
123 SYSCALL_MODULE(syscallname, \
124 & syscallname##_syscall, & syscallname##_sysent, \
127 int syscall_register (int *offset
, struct sysent
*new_sysent
,
128 struct sysent
*old_sysent
);
129 int syscall_deregister (int *offset
, struct sysent
*old_sysent
);
130 int syscall_module_handler (struct module
*mod
, int what
, void *arg
);
134 #endif /* !_SYS_SYSENT_H_ */