1 /*
2 * KSYSCALLS.C
3 *
4 * cc -I/usr/src/sys ksyscalls.c -o /usr/local/bin/ksyscalls -lkvm
5 *
6 * Dump syscall debugging info
7 *
8 * Copyright (c) 2011 The DragonFly Project. All rights reserved.
9 *
10 * This code is derived from software contributed to The DragonFly Project
11 * by Matthew Dillon <dillon@backplane.com>
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 *
17 * 1. Redistributions of source code must retain the above copyright
18 * notice, this list of conditions and the following disclaimer.
19 * 2. Redistributions in binary form must reproduce the above copyright
20 * notice, this list of conditions and the following disclaimer in
21 * the documentation and/or other materials provided with the
22 * distribution.
23 * 3. Neither the name of The DragonFly Project nor the names of its
24 * contributors may be used to endorse or promote products derived
25 * from this software without specific, prior written permission.
26 *
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
30 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
31 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
32 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
33 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
34 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
35 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
36 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
37 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 */
40
41 #define _KERNEL_STRUCTURES_
42 #include <sys/param.h>
43 #include <sys/user.h>
44 #include <sys/malloc.h>
45 #include <sys/signalvar.h>
46 #include <sys/vnode.h>
47 #include <sys/namecache.h>
48 #include <sys/syscall.h>
49
50 #include <vm/vm.h>
51 #include <vm/vm_page.h>
52 #include <vm/vm_kern.h>
53 #include <vm/vm_object.h>
54 #include <vm/vm_map.h>
55 #include <vm/swap_pager.h>
56 #include <vm/vnode_pager.h>
57
58 #include <stdio.h>
59 #include <stdlib.h>
60 #include <string.h>
61 #include <fcntl.h>
62 #include <kvm.h>
63 #include <nlist.h>
64 #include <getopt.h>
65
66 struct nlist Nl[] = {
67 { "_SysCallsWorstCase" },
68 { NULL }
69 };
70
71 static void kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes);
72
73 int
main(int ac,char ** av)74 main(int ac, char **av)
75 {
76 const char *corefile = NULL;
77 const char *sysfile = NULL;
78 kvm_t *kd;
79 int ch;
80 int i;
81 uint64_t syscallsworstcase[SYS_MAXSYSCALL];
82
83 while ((ch = getopt(ac, av, "M:N:")) != -1) {
84 switch(ch) {
85 case 'M':
86 corefile = optarg;
87 break;
88 case 'N':
89 sysfile = optarg;
90 break;
91 default:
92 fprintf(stderr, "%s [-M core] [-N system]\n", av[0]);
93 exit(1);
94 }
95 }
96 ac -= optind;
97 av += optind;
98
99 if ((kd = kvm_open(sysfile, corefile, NULL, O_RDONLY, "kvm:")) == NULL) {
100 perror("kvm_open");
101 exit(1);
102 }
103 if (kvm_nlist(kd, Nl) != 0) {
104 perror("kvm_nlist");
105 exit(1);
106 }
107 kkread(kd, Nl[0].n_value, syscallsworstcase, sizeof(syscallsworstcase));
108
109 for (i = 0; i < SYS_MAXSYSCALL; ++i) {
110 if (syscallsworstcase[i])
111 printf("call %3d %6jduS\n", i, (intmax_t)syscallsworstcase[i]);
112 }
113 }
114
115 static void
kkread(kvm_t * kd,u_long addr,void * buf,size_t nbytes)116 kkread(kvm_t *kd, u_long addr, void *buf, size_t nbytes)
117 {
118 if (kvm_read(kd, addr, buf, nbytes) != nbytes) {
119 perror("kvm_read");
120 exit(1);
121 }
122 }
123