1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <stdlib.h> 30 #include <fcntl.h> 31 #include <strings.h> 32 #include <stdio.h> 33 #include <errno.h> 34 #include <sys/types.h> 35 #include <sys/inttypes.h> 36 #include <sys/elf.h> 37 #include <sys/elf_notes.h> 38 #include <sys/mman.h> 39 #include <sys/stat.h> 40 #include <sys/statvfs.h> 41 42 static char *pname; 43 static char *fname; 44 static char *image; /* pointer to the ELF file in memory */ 45 46 #define ELFSEEK(offset) ((void *)(image + offset)) 47 48 /* 49 * Extract the PT_LOAD bits and format them into a .s 50 */ 51 static void 52 extract32(Elf32_Ehdr *eh) 53 { 54 Elf32_Phdr *phdr; 55 caddr_t allphdrs; 56 int i; 57 int c; 58 unsigned char *bytes; 59 uint_t cnt = 10; 60 61 allphdrs = NULL; 62 63 if (eh->e_type != ET_EXEC) { 64 (void) fprintf(stderr, "%s: not ET_EXEC, e_type = 0x%x\n", 65 pname, eh->e_type); 66 exit(1); 67 } 68 if (eh->e_phnum == 0 || eh->e_phoff == 0) { 69 (void) fprintf(stderr, "%s: no program headers\n", pname); 70 exit(1); 71 } 72 73 /* 74 * Get the program headers. 75 */ 76 allphdrs = ELFSEEK(eh->e_phoff); 77 if (allphdrs == NULL) { 78 (void) fprintf(stderr, "%s: Failed to get %d program hdrs\n", 79 pname, eh->e_phnum); 80 exit(1); 81 } 82 83 /* 84 * Find the PT_LOAD section 85 */ 86 for (i = 0; i < eh->e_phnum; i++) { 87 /*LINTED [ELF program header alignment]*/ 88 phdr = (Elf32_Phdr *)(allphdrs + eh->e_phentsize * i); 89 90 if (phdr->p_type != PT_LOAD) 91 continue; 92 93 if (phdr->p_memsz == 0) 94 continue; 95 96 bytes = ELFSEEK(phdr->p_offset); 97 for (c = 0; c < phdr->p_filesz; ++c) { 98 if (c % cnt == 0) 99 (void) printf("\n .byte "); 100 else 101 (void) printf(","); 102 (void) printf("0x%x", bytes[c]); 103 } 104 for (; c < phdr->p_memsz; ++c) { 105 if (c % cnt == 0) { 106 (void) printf("\n .byte "); 107 cnt = 20; 108 } else { 109 (void) printf(", "); 110 } 111 (void) printf("0"); 112 } 113 (void) printf("\n"); 114 return; 115 } 116 117 (void) fprintf(stderr, "%s: Failed finding PT_LOAD section\n", pname); 118 exit(1); 119 } 120 121 static void 122 extract64(Elf64_Ehdr *eh) 123 { 124 Elf64_Phdr *phdr; 125 caddr_t allphdrs; 126 int i; 127 int c; 128 unsigned char *bytes; 129 uint_t cnt = 10; 130 131 allphdrs = NULL; 132 133 if (eh->e_type != ET_EXEC) { 134 (void) fprintf(stderr, "%s: not ET_EXEC, e_type = 0x%x\n", 135 pname, eh->e_type); 136 exit(1); 137 } 138 if (eh->e_phnum == 0 || eh->e_phoff == 0) { 139 (void) fprintf(stderr, "%s: no program headers\n", pname); 140 exit(1); 141 } 142 143 /* 144 * Get the program headers. 145 */ 146 allphdrs = ELFSEEK(eh->e_phoff); 147 if (allphdrs == NULL) { 148 (void) fprintf(stderr, "%s: Failed to get %d program hdrs\n", 149 pname, eh->e_phnum); 150 exit(1); 151 } 152 153 /* 154 * Find the PT_LOAD section 155 */ 156 for (i = 0; i < eh->e_phnum; i++) { 157 /*LINTED [ELF program header alignment]*/ 158 phdr = (Elf64_Phdr *)(allphdrs + eh->e_phentsize * i); 159 160 if (phdr->p_type != PT_LOAD) 161 continue; 162 163 if (phdr->p_memsz == 0) 164 continue; 165 166 bytes = ELFSEEK(phdr->p_offset); 167 for (c = 0; c < phdr->p_filesz; ++c) { 168 if (c % cnt == 0) 169 (void) printf("\n .byte "); 170 else 171 (void) printf(","); 172 (void) printf("0x%x", bytes[c]); 173 } 174 for (; c < phdr->p_memsz; ++c) { 175 if (c % cnt == 0) { 176 (void) printf("\n .byte "); 177 cnt = 20; 178 } else { 179 (void) printf(", "); 180 } 181 (void) printf("0"); 182 } 183 (void) printf("\n"); 184 return; 185 } 186 187 (void) fprintf(stderr, "%s: Failed finding PT_LOAD section\n", pname); 188 exit(1); 189 } 190 191 int 192 main(int argc, char **argv) 193 { 194 int fd; 195 uchar_t *ident; 196 void *hdr = NULL; 197 struct stat stats; 198 ssize_t r; 199 size_t pgsz; 200 uint_t len; 201 202 /* 203 * we expect one argument -- the elf file 204 */ 205 if (argc != 2) { 206 (void) fprintf(stderr, "usage: %s <unix-elf-file>\n", argv[0]); 207 exit(1); 208 } 209 210 pname = strrchr(argv[0], '/'); 211 if (pname == NULL) 212 pname = argv[0]; 213 else 214 ++pname; 215 216 fname = argv[1]; 217 fd = open(fname, O_RDONLY); 218 if (fd < 0) { 219 (void) fprintf(stderr, "%s: open(%s, O_RDONLY) failed, %s\n", 220 pname, fname, strerror(errno)); 221 exit(1); 222 } 223 224 if (stat(fname, &stats) < 0) { 225 (void) fprintf(stderr, "%s: stat(%s, ...) failed, %s\n", 226 pname, fname, strerror(errno)); 227 exit(1); 228 } 229 230 pgsz = getpagesize(); 231 len = (stats.st_size + (pgsz - 1)) & (~(pgsz - 1)); 232 233 /* 234 * mmap the file 235 */ 236 image = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0); 237 if (image == MAP_FAILED) { 238 (void) fprintf(stderr, "%s: mmap() of %s failed, %s\n", 239 pname, fname, strerror(errno)); 240 exit(1); 241 } 242 243 ident = ELFSEEK(0); 244 if (ident[EI_MAG0] != ELFMAG0 || ident[EI_MAG1] != ELFMAG1 || 245 ident[EI_MAG2] != ELFMAG2 || ident[EI_MAG3] != ELFMAG3) { 246 (void) fprintf(stderr, "%s: not an ELF file!\n", pname); 247 exit(1); 248 } 249 250 if (ident[EI_CLASS] == ELFCLASS32) { 251 hdr = ELFSEEK(0); 252 extract32(hdr); 253 } else if (ident[EI_CLASS] == ELFCLASS64) { 254 hdr = ELFSEEK(0); 255 extract64(hdr); 256 } else { 257 (void) fprintf(stderr, "%s: Wrong ELF class 0x%x\n", pname, 258 ident[EI_CLASS]); 259 exit(1); 260 } 261 return (0); 262 } 263