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 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 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