The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/sys/sysent.h

Version: -  FREEBSD  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-2  -  FREEBSD-11-1  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-4  -  FREEBSD-10-3  -  FREEBSD-10-2  -  FREEBSD-10-1  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-3  -  FREEBSD-9-2  -  FREEBSD-9-1  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-4  -  FREEBSD-8-3  -  FREEBSD-8-2  -  FREEBSD-8-1  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-4  -  FREEBSD-7-3  -  FREEBSD-7-2  -  FREEBSD-7-1  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-4  -  FREEBSD-6-3  -  FREEBSD-6-2  -  FREEBSD-6-1  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-5  -  FREEBSD-5-4  -  FREEBSD-5-3  -  FREEBSD-5-2  -  FREEBSD-5-1  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  linux-2.6  -  linux-2.4.22  -  MK83  -  MK84  -  PLAN9  -  DFBSD  -  NETBSD  -  NETBSD5  -  NETBSD4  -  NETBSD3  -  NETBSD20  -  OPENBSD  -  xnu-517  -  xnu-792  -  xnu-792.6.70  -  xnu-1228  -  xnu-1456.1.26  -  xnu-1699.24.8  -  xnu-2050.18.24  -  OPENSOLARIS  -  minix-3-1-1 
SearchContext: -  none  -  3  -  10 

    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.
   13  * 4. Neither the name of the University nor the names of its contributors
   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: releng/11.1/sys/sys/sysent.h 314639 2017-03-04 00:33:41Z kib $
   30  */
   31 
   32 #ifndef _SYS_SYSENT_H_
   33 #define _SYS_SYSENT_H_
   34 
   35 #include <bsm/audit.h>
   36 
   37 struct rlimit;
   38 struct sysent;
   39 struct thread;
   40 struct ksiginfo;
   41 struct syscall_args;
   42 
   43 enum systrace_probe_t {
   44         SYSTRACE_ENTRY,
   45         SYSTRACE_RETURN,
   46 };
   47 
   48 typedef int     sy_call_t(struct thread *, void *);
   49 
   50 typedef void    (*systrace_probe_func_t)(struct syscall_args *,
   51                     enum systrace_probe_t, int);
   52 typedef void    (*systrace_args_func_t)(int, void *, uint64_t *, int *);
   53 
   54 extern systrace_probe_func_t    systrace_probe_func;
   55 
   56 struct sysent {                 /* system call table */
   57         int     sy_narg;        /* number of arguments */
   58         sy_call_t *sy_call;     /* implementing function */
   59         au_event_t sy_auevent;  /* audit event associated with syscall */
   60         systrace_args_func_t sy_systrace_args_func;
   61                                 /* optional argument conversion function. */
   62         u_int32_t sy_entry;     /* DTrace entry ID for systrace. */
   63         u_int32_t sy_return;    /* DTrace return ID for systrace. */
   64         u_int32_t sy_flags;     /* General flags for system calls. */
   65         u_int32_t sy_thrcnt;
   66 };
   67 
   68 /*
   69  * A system call is permitted in capability mode.
   70  */
   71 #define SYF_CAPENABLED  0x00000001
   72 
   73 #define SY_THR_FLAGMASK 0x7
   74 #define SY_THR_STATIC   0x1
   75 #define SY_THR_DRAINING 0x2
   76 #define SY_THR_ABSENT   0x4
   77 #define SY_THR_INCR     0x8
   78 
   79 #ifdef KLD_MODULE
   80 #define SY_THR_STATIC_KLD       0
   81 #else
   82 #define SY_THR_STATIC_KLD       SY_THR_STATIC
   83 #endif
   84 
   85 struct image_params;
   86 struct __sigset;
   87 struct trapframe;
   88 struct vnode;
   89 
   90 struct sysentvec {
   91         int             sv_size;        /* number of entries */
   92         struct sysent   *sv_table;      /* pointer to sysent */
   93         u_int           sv_mask;        /* optional mask to index */
   94         int             sv_errsize;     /* size of errno translation table */
   95         int             *sv_errtbl;     /* errno translation table */
   96         int             (*sv_transtrap)(int, int);
   97                                         /* translate trap-to-signal mapping */
   98         int             (*sv_fixup)(register_t **, struct image_params *);
   99                                         /* stack fixup function */
  100         void            (*sv_sendsig)(void (*)(int), struct ksiginfo *, struct __sigset *);
  101                                         /* send signal */
  102         char            *sv_sigcode;    /* start of sigtramp code */
  103         int             *sv_szsigcode;  /* size of sigtramp code */
  104         char            *sv_name;       /* name of binary type */
  105         int             (*sv_coredump)(struct thread *, struct vnode *, off_t, int);
  106                                         /* function to dump core, or NULL */
  107         int             (*sv_imgact_try)(struct image_params *);
  108         int             sv_minsigstksz; /* minimum signal stack size */
  109         int             sv_pagesize;    /* pagesize */
  110         vm_offset_t     sv_minuser;     /* VM_MIN_ADDRESS */
  111         vm_offset_t     sv_maxuser;     /* VM_MAXUSER_ADDRESS */
  112         vm_offset_t     sv_usrstack;    /* USRSTACK */
  113         vm_offset_t     sv_psstrings;   /* PS_STRINGS */
  114         int             sv_stackprot;   /* vm protection for stack */
  115         register_t      *(*sv_copyout_strings)(struct image_params *);
  116         void            (*sv_setregs)(struct thread *, struct image_params *,
  117                             u_long);
  118         void            (*sv_fixlimit)(struct rlimit *, int);
  119         u_long          *sv_maxssiz;
  120         u_int           sv_flags;
  121         void            (*sv_set_syscall_retval)(struct thread *, int);
  122         int             (*sv_fetch_syscall_args)(struct thread *, struct
  123                             syscall_args *);
  124         const char      **sv_syscallnames;
  125         vm_offset_t     sv_timekeep_base;
  126         vm_offset_t     sv_shared_page_base;
  127         vm_offset_t     sv_shared_page_len;
  128         vm_offset_t     sv_sigcode_base;
  129         void            *sv_shared_page_obj;
  130         void            (*sv_schedtail)(struct thread *);
  131         void            (*sv_thread_detach)(struct thread *);
  132         int             (*sv_trap)(struct thread *);
  133 };
  134 
  135 #define SV_ILP32        0x000100        /* 32-bit executable. */
  136 #define SV_LP64         0x000200        /* 64-bit executable. */
  137 #define SV_IA32         0x004000        /* Intel 32-bit executable. */
  138 #define SV_AOUT         0x008000        /* a.out executable. */
  139 #define SV_SHP          0x010000        /* Shared page. */
  140 #define SV_CAPSICUM     0x020000        /* Force cap_enter() on startup. */
  141 #define SV_TIMEKEEP     0x040000        /* Shared page timehands. */
  142 
  143 #define SV_ABI_MASK     0xff
  144 #define SV_ABI_ERRNO(p, e)      ((p)->p_sysent->sv_errsize <= 0 ? e :   \
  145         ((e) >= (p)->p_sysent->sv_errsize ? -1 : (p)->p_sysent->sv_errtbl[e]))
  146 #define SV_PROC_FLAG(p, x)      ((p)->p_sysent->sv_flags & (x))
  147 #define SV_PROC_ABI(p)          ((p)->p_sysent->sv_flags & SV_ABI_MASK)
  148 #define SV_CURPROC_FLAG(x)      SV_PROC_FLAG(curproc, x)
  149 #define SV_CURPROC_ABI()        SV_PROC_ABI(curproc)
  150 /* same as ELFOSABI_XXX, to prevent header pollution */
  151 #define SV_ABI_LINUX    3
  152 #define SV_ABI_FREEBSD  9
  153 #define SV_ABI_CLOUDABI 17
  154 #define SV_ABI_UNDEF    255
  155 
  156 #ifdef _KERNEL
  157 extern struct sysentvec aout_sysvec;
  158 extern struct sysent sysent[];
  159 extern const char *syscallnames[];
  160 
  161 #if defined(__amd64__)
  162 extern int i386_read_exec;
  163 #endif
  164 
  165 #define NO_SYSCALL (-1)
  166 
  167 struct module;
  168 
  169 struct syscall_module_data {
  170         int     (*chainevh)(struct module *, int, void *); /* next handler */
  171         void    *chainarg;              /* arg for next event handler */
  172         int     *offset;                /* offset into sysent */
  173         struct sysent *new_sysent;      /* new sysent */
  174         struct sysent old_sysent;       /* old sysent */
  175         int     flags;                  /* flags for syscall_register */
  176 };
  177 
  178 /* separate initialization vector so it can be used in a substructure */
  179 #define SYSENT_INIT_VALS(_syscallname) {                        \
  180         .sy_narg = (sizeof(struct _syscallname ## _args )       \
  181             / sizeof(register_t)),                              \
  182         .sy_call = (sy_call_t *)&sys_##_syscallname,            \
  183         .sy_auevent = SYS_AUE_##_syscallname,                   \
  184         .sy_systrace_args_func = NULL,                          \
  185         .sy_entry = 0,                                          \
  186         .sy_return = 0,                                         \
  187         .sy_flags = 0,                                          \
  188         .sy_thrcnt = 0                                          \
  189 }                                                       
  190 
  191 #define MAKE_SYSENT(syscallname)                                \
  192 static struct sysent syscallname##_sysent = SYSENT_INIT_VALS(syscallname);
  193 
  194 #define MAKE_SYSENT_COMPAT(syscallname)                         \
  195 static struct sysent syscallname##_sysent = {                   \
  196         (sizeof(struct syscallname ## _args )                   \
  197             / sizeof(register_t)),                              \
  198         (sy_call_t *)& syscallname,                             \
  199         SYS_AUE_##syscallname                                   \
  200 }
  201 
  202 #define SYSCALL_MODULE(name, offset, new_sysent, evh, arg)      \
  203 static struct syscall_module_data name##_syscall_mod = {        \
  204         evh, arg, offset, new_sysent, { 0, NULL, AUE_NULL }     \
  205 };                                                              \
  206                                                                 \
  207 static moduledata_t name##_mod = {                              \
  208         "sys/" #name,                                           \
  209         syscall_module_handler,                                 \
  210         &name##_syscall_mod                                     \
  211 };                                                              \
  212 DECLARE_MODULE(name, name##_mod, SI_SUB_SYSCALLS, SI_ORDER_MIDDLE)
  213 
  214 #define SYSCALL_MODULE_HELPER(syscallname)                      \
  215 static int syscallname##_syscall = SYS_##syscallname;           \
  216 MAKE_SYSENT(syscallname);                                       \
  217 SYSCALL_MODULE(syscallname,                                     \
  218     & syscallname##_syscall, & syscallname##_sysent,            \
  219     NULL, NULL)
  220 
  221 #define SYSCALL_MODULE_PRESENT(syscallname)                             \
  222         (sysent[SYS_##syscallname].sy_call != (sy_call_t *)lkmnosys &&  \
  223         sysent[SYS_##syscallname].sy_call != (sy_call_t *)lkmressys)
  224 
  225 /*
  226  * Syscall registration helpers with resource allocation handling.
  227  */
  228 struct syscall_helper_data {
  229         struct sysent new_sysent;
  230         struct sysent old_sysent;
  231         int syscall_no;
  232         int registered;
  233 };
  234 #define SYSCALL_INIT_HELPER(syscallname) {                      \
  235     .new_sysent = {                                             \
  236         .sy_narg = (sizeof(struct syscallname ## _args )        \
  237             / sizeof(register_t)),                              \
  238         .sy_call = (sy_call_t *)& sys_ ## syscallname,          \
  239         .sy_auevent = SYS_AUE_##syscallname                     \
  240     },                                                          \
  241     .syscall_no = SYS_##syscallname                             \
  242 }
  243 #define SYSCALL_INIT_HELPER_COMPAT(syscallname) {               \
  244     .new_sysent = {                                             \
  245         .sy_narg = (sizeof(struct syscallname ## _args )        \
  246             / sizeof(register_t)),                              \
  247         .sy_call = (sy_call_t *)& syscallname,                  \
  248         .sy_auevent = SYS_AUE_##syscallname                     \
  249     },                                                          \
  250     .syscall_no = SYS_##syscallname                             \
  251 }
  252 #define SYSCALL_INIT_LAST {                                     \
  253     .syscall_no = NO_SYSCALL                                    \
  254 }
  255 
  256 int     syscall_register(int *offset, struct sysent *new_sysent,
  257             struct sysent *old_sysent, int flags);
  258 int     syscall_deregister(int *offset, struct sysent *old_sysent);
  259 int     syscall_module_handler(struct module *mod, int what, void *arg);
  260 int     syscall_helper_register(struct syscall_helper_data *sd, int flags);
  261 int     syscall_helper_unregister(struct syscall_helper_data *sd);
  262 
  263 struct proc;
  264 const char *syscallname(struct proc *p, u_int code);
  265 
  266 /* Special purpose system call functions. */
  267 struct nosys_args;
  268 
  269 int     lkmnosys(struct thread *, struct nosys_args *);
  270 int     lkmressys(struct thread *, struct nosys_args *);
  271 
  272 int     syscall_thread_enter(struct thread *td, struct sysent *se);
  273 void    syscall_thread_exit(struct thread *td, struct sysent *se);
  274 
  275 int shared_page_alloc(int size, int align);
  276 int shared_page_fill(int size, int align, const void *data);
  277 void shared_page_write(int base, int size, const void *data);
  278 void exec_sysvec_init(void *param);
  279 void exec_inittk(void);
  280 
  281 #define INIT_SYSENTVEC(name, sv)                                        \
  282     SYSINIT(name, SI_SUB_EXEC, SI_ORDER_ANY,                            \
  283         (sysinit_cfunc_t)exec_sysvec_init, sv);
  284 
  285 #endif /* _KERNEL */
  286 
  287 #endif /* !_SYS_SYSENT_H_ */

Cache object: 38dbb9512542bd7736da173a86dfdc4f


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.