1 /*- 2 * Copyright (C) 1999 T.Horiuchi(Brains, Corp.) and SAITOH Masanobu. 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 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 25 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <stdio.h> 29 #include <stdlib.h> 30 #include <sys/exec_coff.h> 31 #include <sys/param.h> 32 #include <sys/gmon.h> 33 #include <sys/stat.h> 34 #include <sys/sysctl.h> 35 #include <sys/socket.h> 36 #include <sys/file.h> 37 #include <uvm/uvm_param.h> 38 #include <machine/cpu.h> 39 40 #define vm_page_size (NBPG) 41 42 char *netbsd = "/netbsd"; 43 struct coff_filehdr FileHdr; 44 struct coff_aouthdr AoutHdr; 45 46 static int coff_find_section(FILE *, struct coff_filehdr *, 47 struct coff_scnhdr *, int); 48 49 void LoadAndReset(char *); 50 int main(int, char **); 51 52 static int 53 coff_find_section(FILE *fd, struct coff_filehdr *fp, struct coff_scnhdr *sh, int s_type) 54 { 55 int i, pos, siz; 56 57 pos = COFF_HDR_SIZE; 58 for (i = 0; i < fp->f_nscns; i++, pos += sizeof(struct coff_scnhdr)) { 59 siz = sizeof(struct coff_scnhdr); 60 if (fread(sh, 1, siz, fd) != siz) { 61 perror("osloader"); 62 exit(1); 63 } 64 65 if (sh->s_flags == s_type) 66 return (0); 67 } 68 return (-1); 69 } 70 71 void 72 LoadAndReset(char *osimage) 73 { 74 int mib[2]; 75 u_long val; 76 int len; 77 78 mib[0] = CTL_MACHDEP; 79 mib[1] = CPU_LOADANDRESET; 80 val = (u_long)osimage; 81 len = sizeof(val); 82 83 sysctl(mib, 2, NULL, NULL, &val, len); 84 } 85 86 int 87 main(int argc, char *argv[]) 88 { 89 FILE *fp; 90 int error; 91 long dsize; 92 struct coff_scnhdr sh; 93 u_long ep_taddr; 94 u_long ep_tsize; 95 u_long toffset; 96 u_long ep_daddr; 97 u_long ep_dsize; 98 u_long doffset; 99 char *osimage; 100 char *p; 101 int i; 102 u_long cksum; 103 u_long size; 104 105 fp = fopen(netbsd, "r"); 106 if (fp == NULL) { 107 perror("osloader"); 108 exit(1); 109 } 110 111 if (fread(&FileHdr, 1, sizeof(FileHdr), fp) != sizeof(FileHdr)) { 112 perror("osloader"); 113 exit(1); 114 } 115 116 if (fread(&AoutHdr, 1, sizeof(AoutHdr), fp) != sizeof(AoutHdr)) { 117 perror("osloader"); 118 exit(1); 119 } 120 121 /* set up command for text segment */ 122 error = coff_find_section(fp, &FileHdr, &sh, COFF_STYP_TEXT); 123 if (error) { 124 printf("can't find text section: %d\n", error); 125 exit(1); 126 } 127 128 ep_taddr = COFF_ALIGN(sh.s_vaddr); 129 toffset = sh.s_scnptr - (sh.s_vaddr - ep_taddr); 130 ep_tsize = sh.s_size + (sh.s_vaddr - ep_taddr); 131 132 printf("addr %lx size 0x%lx offset 0x%lx\n", ep_taddr, 133 ep_tsize, toffset); 134 135 /* set up command for data segment */ 136 error = coff_find_section(fp, &FileHdr, &sh, COFF_STYP_DATA); 137 if (error) { 138 printf("can't find data section: %d\n", error); 139 exit(1); 140 } 141 142 ep_daddr = COFF_ALIGN(sh.s_vaddr); 143 doffset = sh.s_scnptr - (sh.s_vaddr - ep_daddr); 144 dsize = sh.s_size + (sh.s_vaddr - ep_daddr); 145 ep_dsize = round_page(dsize) + AoutHdr.a_bsize; 146 147 printf("addr 0x%lx size 0x%lx offset 0x%lx\n", ep_daddr, 148 dsize, doffset); 149 150 osimage = malloc(ep_tsize+dsize+sizeof(u_long) * 2); 151 if (osimage == NULL) { 152 printf("osloader:no memory\n"); 153 exit(1); 154 } 155 156 *(u_long *)osimage = ep_tsize+dsize; 157 p = osimage + 2 * sizeof(u_long); 158 159 /* load text area */ 160 fseek(fp, toffset, SEEK_SET); 161 if (fread(p, 1, ep_tsize, fp) != ep_tsize) { 162 perror("osloader:"); 163 exit(1); 164 } 165 166 /* load data area */ 167 fseek(fp, doffset, SEEK_SET); 168 if (fread(p + ep_daddr - ep_taddr, 1, dsize, fp) != dsize) { 169 perror("osloader:"); 170 exit(1); 171 } 172 173 fclose(fp); 174 175 cksum = 0; 176 size = (ep_tsize + dsize) >> 2; 177 178 for(i = 0; i < size; i++) { 179 cksum += *(u_long *)p; 180 p += sizeof(u_long); 181 } 182 183 *(u_long *)(osimage+sizeof(u_long)) = cksum; 184 185 LoadAndReset(osimage); 186 187 return (0); /* NOTREACHED */ 188 } 189