Annotation of sys/kern/kern_xxx.c, Revision 1.1.1.1
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 */
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