aout.c revision 1.8
1 /* $NetBSD: aout.c,v 1.8 2005/06/28 21:03:02 junyoung Exp $ */ 2 3 /*- 4 * Copyright (c) 1998 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Leo Weppelman. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 40 #ifdef TOSTOOLS 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <unistd.h> 44 #include <string.h> 45 #include <sys/types.h> 46 #include <a_out.h> 47 48 #define MALLOC(x) malloc(x) 49 50 #else 51 52 #include <lib/libsa/stand.h> 53 #include <atari_stand.h> 54 #include <string.h> 55 #include <libkern.h> 56 #include <sys/exec_aout.h> 57 58 #define MALLOC(x) alloc(x) 59 #endif 60 61 #include "libtos.h" 62 #include "kparamb.h" 63 #include "tosdefs.h" 64 #include "cread.h" 65 66 67 #ifdef TOSTOOLS 68 /* 69 * Assume compiling under TOS or MINT. The page-size will always 70 * be incorrect then (if it is defined anyway). 71 */ 72 #ifdef AOUT_LDPGSZ 73 #undef AOUT_LDPGSZ 74 #endif 75 76 #define AOUT_LDPGSZ (8*1024) /* Page size for NetBSD */ 77 78 #endif /* TOSTOOLS */ 79 80 /* 81 * Load an a.out image. 82 * Exit codes: 83 * -1 : Not an a.outfile 84 * 0 : OK 85 * error# : Error during load (*errp might contain error string). 86 */ 87 int 88 aout_load(int fd, osdsc_t *od, char **errp, int loadsyms) 89 { 90 long textsz, stringsz; 91 struct exec ehdr; 92 int err; 93 94 *errp = NULL; 95 96 lseek(fd, (off_t)0, SEEK_SET); 97 if (read(fd, (char *)&ehdr, sizeof(ehdr)) != sizeof(ehdr)) 98 return -1; 99 100 #ifdef TOSTOOLS 101 if ((ehdr.a_magic & 0xffff) != NMAGIC) 102 return -1; 103 #else 104 if ((N_GETMAGIC(ehdr) != NMAGIC) && (N_GETMAGIC(ehdr) != OMAGIC)) 105 return -1; 106 #endif 107 108 /* 109 * Extract various sizes from the kernel executable 110 */ 111 textsz = (ehdr.a_text + AOUT_LDPGSZ - 1) & ~(AOUT_LDPGSZ - 1); 112 od->k_esym = 0; 113 od->ksize = textsz + ehdr.a_data + ehdr.a_bss; 114 od->kentry = ehdr.a_entry; 115 116 if (loadsyms && ehdr.a_syms) { 117 err = 1; 118 if (lseek(fd, ehdr.a_text+ehdr.a_data+ehdr.a_syms+sizeof(ehdr), 119 0) <= 0) 120 goto error; 121 err = 2; 122 if (read(fd, (char *)&stringsz, sizeof(long)) != sizeof(long)) 123 goto error; 124 err = 3; 125 if (lseek(fd, sizeof(ehdr), 0) <= 0) 126 goto error; 127 od->ksize += ehdr.a_syms + sizeof(long) + stringsz; 128 } 129 130 err = 4; 131 if ((od->kstart = (u_char *)MALLOC(od->ksize)) == NULL) 132 goto error; 133 134 /* 135 * Read text & data, clear bss 136 */ 137 err = 5; 138 if ((read(fd, (char *)(od->kstart), ehdr.a_text) != ehdr.a_text) 139 ||(read(fd,(char *)(od->kstart+textsz),ehdr.a_data) != ehdr.a_data)) 140 goto error; 141 bzero(od->kstart + textsz + ehdr.a_data, ehdr.a_bss); 142 143 /* 144 * Read symbol and string table 145 */ 146 if (loadsyms && ehdr.a_syms) { 147 long *p; 148 149 p = (long *)((od->kstart) + textsz + ehdr.a_data + ehdr.a_bss); 150 *p++ = ehdr.a_syms; 151 err = 6; 152 if (read(fd, (char *)p, ehdr.a_syms) != ehdr.a_syms) 153 goto error; 154 p = (long *)((char *)p + ehdr.a_syms); 155 err = 7; 156 if (read(fd, (char *)p, stringsz) != stringsz) 157 goto error; 158 od->k_esym = (long)((char *)p-(char *)od->kstart +stringsz); 159 } 160 return 0; 161 162 error: 163 #ifdef TOSTOOLS 164 { 165 static char *errs[] = { 166 /* 1 */ "Cannot seek to string table", 167 /* 2 */ "Cannot read string-table size", 168 /* 3 */ "Cannot seek back to text start", 169 /* 4 */ "Cannot malloc kernel image space", 170 /* 5 */ "Unable to read kernel image", 171 /* 6 */ "Cannot read symbol table", 172 /* 7 */ "Cannot read string table" 173 }; 174 *errp = errs[err]; 175 } 176 #endif /* TOSTOOLS */ 177 178 return err; 179 } 180
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