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Annotation of sys/kern/kern_xxx.c, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: kern_xxx.c,v 1.10 2005/11/28 00:14:29 jsg Exp $       */
        !             2: /*     $NetBSD: kern_xxx.c,v 1.32 1996/04/22 01:38:41 christos Exp $   */
        !             3:
        !             4: /*
        !             5:  * Copyright (c) 1982, 1986, 1989, 1993
        !             6:  *     The Regents of the University of California.  All rights reserved.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms, with or without
        !             9:  * modification, are permitted provided that the following conditions
        !            10:  * are met:
        !            11:  * 1. Redistributions of source code must retain the above copyright
        !            12:  *    notice, this list of conditions and the following disclaimer.
        !            13:  * 2. Redistributions in binary form must reproduce the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer in the
        !            15:  *    documentation and/or other materials provided with the distribution.
        !            16:  * 3. Neither the name of the University nor the names of its contributors
        !            17:  *    may be used to endorse or promote products derived from this software
        !            18:  *    without specific prior written permission.
        !            19:  *
        !            20:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            21:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            22:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            23:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            24:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            25:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            26:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            27:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            28:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            29:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            30:  * SUCH DAMAGE.
        !            31:  *
        !            32:  *     @(#)kern_xxx.c  8.2 (Berkeley) 11/14/93
        !            33:  */
        !            34:
        !            35: #include <sys/param.h>
        !            36: #include <sys/systm.h>
        !            37: #include <sys/kernel.h>
        !            38: #include <sys/proc.h>
        !            39: #include <sys/reboot.h>
        !            40: #include <uvm/uvm_extern.h>
        !            41: #include <sys/sysctl.h>
        !            42: #include <sys/mount.h>
        !            43: #include <sys/syscallargs.h>
        !            44:
        !            45: /* ARGSUSED */
        !            46: int
        !            47: sys_reboot(struct proc *p, void *v, register_t *retval)
        !            48: {
        !            49:        struct sys_reboot_args /* {
        !            50:                syscallarg(int) opt;
        !            51:        } */ *uap = v;
        !            52:        int error;
        !            53:
        !            54:        if ((error = suser(p, 0)) != 0)
        !            55:                return (error);
        !            56:        boot(SCARG(uap, opt));
        !            57:        return (0);
        !            58: }
        !            59:
        !            60: #if !defined(NO_PROPOLICE)
        !            61: void __stack_smash_handler(char [], int __attribute__((unused)));
        !            62:
        !            63: void
        !            64: __stack_smash_handler(char func[], int damaged)
        !            65: {
        !            66:        panic("smashed stack in %s", func);
        !            67: }
        !            68: #endif
        !            69:
        !            70: #ifdef SYSCALL_DEBUG
        !            71: #define        SCDEBUG_CALLS           0x0001  /* show calls */
        !            72: #define        SCDEBUG_RETURNS         0x0002  /* show returns */
        !            73: #define        SCDEBUG_ALL             0x0004  /* even syscalls that are implemented */
        !            74: #define        SCDEBUG_SHOWARGS        0x0008  /* show arguments to calls */
        !            75:
        !            76: int    scdebug = SCDEBUG_CALLS|SCDEBUG_RETURNS|SCDEBUG_SHOWARGS;
        !            77:
        !            78: void
        !            79: scdebug_call(struct proc *p, register_t code, register_t args[])
        !            80: {
        !            81:        struct sysent *sy;
        !            82:        struct emul *em;
        !            83:        int i;
        !            84:
        !            85:        if (!(scdebug & SCDEBUG_CALLS))
        !            86:                return;
        !            87:
        !            88:        em = p->p_emul;
        !            89:        sy = &em->e_sysent[code];
        !            90:        if (!(scdebug & SCDEBUG_ALL || code < 0 || code >= em->e_nsysent ||
        !            91:             sy->sy_call == sys_nosys))
        !            92:                return;
        !            93:
        !            94:        printf("proc %d (%s): %s num ", p->p_pid, p->p_comm, em->e_name);
        !            95:        if (code < 0 || code >= em->e_nsysent)
        !            96:                printf("OUT OF RANGE (%d)", code);
        !            97:        else {
        !            98:                printf("%d call: %s", code, em->e_syscallnames[code]);
        !            99:                if (scdebug & SCDEBUG_SHOWARGS) {
        !           100:                        printf("(");
        !           101:                        for (i = 0; i < sy->sy_argsize / sizeof(register_t);
        !           102:                            i++)
        !           103:                                printf("%s0x%lx", i == 0 ? "" : ", ",
        !           104:                                    (long)args[i]);
        !           105:                        printf(")");
        !           106:                }
        !           107:        }
        !           108:        printf("\n");
        !           109: }
        !           110:
        !           111: void
        !           112: scdebug_ret(struct proc *p, register_t code, int error, register_t retval[])
        !           113: {
        !           114:        struct sysent *sy;
        !           115:        struct emul *em;
        !           116:
        !           117:        if (!(scdebug & SCDEBUG_RETURNS))
        !           118:                return;
        !           119:
        !           120:        em = p->p_emul;
        !           121:        sy = &em->e_sysent[code];
        !           122:        if (!(scdebug & SCDEBUG_ALL || code < 0 || code >= em->e_nsysent ||
        !           123:            sy->sy_call == sys_nosys))
        !           124:                return;
        !           125:
        !           126:        printf("proc %d (%s): %s num ", p->p_pid, p->p_comm, em->e_name);
        !           127:        if (code < 0 || code >= em->e_nsysent)
        !           128:                printf("OUT OF RANGE (%d)", code);
        !           129:        else
        !           130:                printf("%d ret: err = %d, rv = 0x%lx,0x%lx", code,
        !           131:                    error, (long)retval[0], (long)retval[1]);
        !           132:        printf("\n");
        !           133: }
        !           134: #endif /* SYSCALL_DEBUG */