193310Sobrien/*- 293310Sobrien * Copyright (c) 2002 Jake Burkholder 393310Sobrien * All rights reserved. 493310Sobrien * 593310Sobrien * Redistribution and use in source and binary forms, with or without 693310Sobrien * modification, are permitted provided that the following conditions 793310Sobrien * are met: 893310Sobrien * 1. Redistributions of source code must retain the above copyright 993310Sobrien * notice, this list of conditions and the following disclaimer. 1093310Sobrien * 2. Redistributions in binary form must reproduce the above copyright 1193310Sobrien * notice, this list of conditions and the following disclaimer in the 1293310Sobrien * documentation and/or other materials provided with the distribution. 1393310Sobrien * 1493310Sobrien * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1593310Sobrien * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1693310Sobrien * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1793310Sobrien * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1893310Sobrien * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1993310Sobrien * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2093310Sobrien * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2193310Sobrien * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2293310Sobrien * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2393310Sobrien * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2493310Sobrien * SUCH DAMAGE. 2593310Sobrien */ 2693310Sobrien 2793310Sobrien#include <sys/cdefs.h> 2893310Sobrien__FBSDID("$FreeBSD$"); 2993310Sobrien 3097281Sru#include <sys/types.h> 3193310Sobrien#include <sys/elf64.h> 32112767Sobrien#include <sys/endian.h> 3393310Sobrien#include <sys/mman.h> 3493310Sobrien#include <sys/stat.h> 3593310Sobrien 3693310Sobrien#include <err.h> 3793310Sobrien#include <fcntl.h> 38203799Sru#include <stdio.h> 39203799Sru#include <stdlib.h> 4097281Sru#include <string.h> 4197281Sru#include <unistd.h> 4293310Sobrien 4397281Sru#define xe16toh(x) ((data == ELFDATA2MSB) ? be16toh(x) : le16toh(x)) 4497281Sru#define xe32toh(x) ((data == ELFDATA2MSB) ? be32toh(x) : le32toh(x)) 4597281Sru#define xe64toh(x) ((data == ELFDATA2MSB) ? be64toh(x) : le64toh(x)) 4697281Sru#define htoxe32(x) ((data == ELFDATA2MSB) ? htobe32(x) : htole32(x)) 4797281Sru 4893310Sobrienstruct exec { 4996981Sru u_int32_t a_magic; 5096981Sru u_int32_t a_text; 5196981Sru u_int32_t a_data; 5296981Sru u_int32_t a_bss; 5396981Sru u_int32_t a_syms; 5496981Sru u_int32_t a_entry; 5596981Sru u_int32_t a_trsize; 5696981Sru u_int32_t a_drsize; 5793310Sobrien}; 5893310Sobrien#define A_MAGIC 0x01030107 5993310Sobrien 6093310Sobrienstatic void usage(void); 6193310Sobrien 6293310Sobrien/* 6393310Sobrien * elf to a.out converter for freebsd/sparc64 bootblocks. 6493310Sobrien */ 6593310Sobrienint 6693310Sobrienmain(int ac, char **av) 6793310Sobrien{ 68153504Smarcel Elf64_Half phentsize; 69153504Smarcel Elf64_Half machine; 70153504Smarcel Elf64_Half phnum; 71153504Smarcel Elf64_Xword filesz; 72153504Smarcel Elf64_Xword memsz; 7393310Sobrien Elf64_Addr entry; 7493310Sobrien Elf64_Off offset; 7593310Sobrien Elf64_Off phoff; 76153504Smarcel Elf64_Word type; 7797281Sru unsigned char data; 7893310Sobrien struct stat sb; 7993310Sobrien struct exec a; 8093310Sobrien Elf64_Phdr *p; 8193310Sobrien Elf64_Ehdr *e; 8293310Sobrien void *v; 8393310Sobrien int efd; 8493310Sobrien int fd; 8593310Sobrien int c; 8693310Sobrien int i; 8793310Sobrien 8897281Sru fd = STDIN_FILENO; 8993310Sobrien while ((c = getopt(ac, av, "o:")) != -1) 9093310Sobrien switch (c) { 9193310Sobrien case 'o': 9293310Sobrien if ((fd = open(optarg, O_CREAT|O_RDWR, 0644)) < 0) 9393310Sobrien err(1, "%s", optarg); 9493310Sobrien break; 9593310Sobrien case '?': 9693310Sobrien default: 9793310Sobrien usage(); 9893310Sobrien } 9993310Sobrien ac -= optind; 10093310Sobrien av += optind; 10193310Sobrien if (ac == 0) 10293310Sobrien usage(); 10393310Sobrien 10493310Sobrien if ((efd = open(*av, O_RDONLY)) < 0 || fstat(efd, &sb) < 0) 10593310Sobrien err(1, NULL); 10693310Sobrien v = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, efd, 0); 10793310Sobrien if ((e = v) == MAP_FAILED) 10893310Sobrien err(1, NULL); 10993310Sobrien 11093310Sobrien if (!IS_ELF(*e)) 11193310Sobrien errx(1, "not an elf file"); 11293310Sobrien if (e->e_ident[EI_CLASS] != ELFCLASS64) 11393310Sobrien errx(1, "wrong class"); 11497281Sru data = e->e_ident[EI_DATA]; 11597281Sru if (data != ELFDATA2MSB && data != ELFDATA2LSB) 11693310Sobrien errx(1, "wrong data format"); 11793310Sobrien if (e->e_ident[EI_VERSION] != EV_CURRENT) 11893310Sobrien errx(1, "wrong elf version"); 11997281Sru machine = xe16toh(e->e_machine); 12097281Sru if (machine != EM_SPARCV9 && machine != EM_ALPHA) 12193310Sobrien errx(1, "wrong machine type"); 12297281Sru phentsize = xe16toh(e->e_phentsize); 12393310Sobrien if (phentsize != sizeof(*p)) 12493310Sobrien errx(1, "phdr size mismatch"); 12593310Sobrien 12697281Sru entry = xe64toh(e->e_entry); 12797281Sru phoff = xe64toh(e->e_phoff); 12897281Sru phnum = xe16toh(e->e_phnum); 12993310Sobrien p = (Elf64_Phdr *)((char *)e + phoff); 13093310Sobrien bzero(&a, sizeof(a)); 13193310Sobrien for (i = 0; i < phnum; i++) { 13297281Sru type = xe32toh(p[i].p_type); 13393310Sobrien switch (type) { 13493310Sobrien case PT_LOAD: 13593310Sobrien if (a.a_magic != 0) 13693310Sobrien errx(1, "too many loadable segments"); 13797281Sru filesz = xe64toh(p[i].p_filesz); 13897281Sru memsz = xe64toh(p[i].p_memsz); 13997281Sru offset = xe64toh(p[i].p_offset); 14097281Sru a.a_magic = htoxe32(A_MAGIC); 14197281Sru a.a_text = htoxe32(filesz); 14297281Sru a.a_bss = htoxe32(memsz - filesz); 14397281Sru a.a_entry = htoxe32(entry); 14493310Sobrien if (write(fd, &a, sizeof(a)) != sizeof(a) || 14597281Sru write(fd, (char *)e + offset, filesz) != (ssize_t)filesz) 14693310Sobrien err(1, NULL); 14793310Sobrien break; 14893310Sobrien default: 14993310Sobrien break; 15093310Sobrien } 15193310Sobrien } 15293310Sobrien 15393310Sobrien return (0); 15493310Sobrien} 15593310Sobrien 15693310Sobrienstatic void 15793310Sobrienusage(void) 15893310Sobrien{ 15993310Sobrien 160203799Sru fprintf(stderr, "usage: elf2aout [-o outfile] infile\n"); 161203799Sru exit(1); 16293310Sobrien} 163