1de7b4b805
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
165 lines
4.3 KiB
C
165 lines
4.3 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2002 Jake Burkholder
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <sys/elf64.h>
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#include <sys/endian.h>
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#define xe16toh(x) ((data == ELFDATA2MSB) ? be16toh(x) : le16toh(x))
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#define xe32toh(x) ((data == ELFDATA2MSB) ? be32toh(x) : le32toh(x))
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#define xe64toh(x) ((data == ELFDATA2MSB) ? be64toh(x) : le64toh(x))
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#define htoxe32(x) ((data == ELFDATA2MSB) ? htobe32(x) : htole32(x))
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struct exec {
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u_int32_t a_magic;
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u_int32_t a_text;
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u_int32_t a_data;
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u_int32_t a_bss;
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u_int32_t a_syms;
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u_int32_t a_entry;
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u_int32_t a_trsize;
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u_int32_t a_drsize;
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};
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#define A_MAGIC 0x01030107
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static void usage(void);
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/*
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* elf to a.out converter for freebsd/sparc64 bootblocks.
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*/
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int
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main(int ac, char **av)
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{
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Elf64_Half phentsize;
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Elf64_Half machine;
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Elf64_Half phnum;
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Elf64_Xword filesz;
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Elf64_Xword memsz;
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Elf64_Addr entry;
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Elf64_Off offset;
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Elf64_Off phoff;
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Elf64_Word type;
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unsigned char data;
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struct stat sb;
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struct exec a;
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Elf64_Phdr *p;
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Elf64_Ehdr *e;
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void *v;
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int efd;
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int fd;
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int c;
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int i;
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fd = STDIN_FILENO;
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while ((c = getopt(ac, av, "o:")) != -1)
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switch (c) {
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case 'o':
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if ((fd = open(optarg, O_CREAT|O_RDWR, 0644)) < 0)
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err(1, "%s", optarg);
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break;
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case '?':
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default:
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usage();
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}
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ac -= optind;
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av += optind;
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if (ac == 0)
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usage();
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if ((efd = open(*av, O_RDONLY)) < 0 || fstat(efd, &sb) < 0)
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err(1, NULL);
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v = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, efd, 0);
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if ((e = v) == MAP_FAILED)
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err(1, NULL);
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if (!IS_ELF(*e))
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errx(1, "not an elf file");
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if (e->e_ident[EI_CLASS] != ELFCLASS64)
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errx(1, "wrong class");
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data = e->e_ident[EI_DATA];
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if (data != ELFDATA2MSB && data != ELFDATA2LSB)
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errx(1, "wrong data format");
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if (e->e_ident[EI_VERSION] != EV_CURRENT)
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errx(1, "wrong elf version");
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machine = xe16toh(e->e_machine);
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if (machine != EM_SPARCV9 && machine != EM_ALPHA)
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errx(1, "wrong machine type");
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phentsize = xe16toh(e->e_phentsize);
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if (phentsize != sizeof(*p))
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errx(1, "phdr size mismatch");
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entry = xe64toh(e->e_entry);
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phoff = xe64toh(e->e_phoff);
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phnum = xe16toh(e->e_phnum);
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p = (Elf64_Phdr *)((char *)e + phoff);
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bzero(&a, sizeof(a));
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for (i = 0; i < phnum; i++) {
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type = xe32toh(p[i].p_type);
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switch (type) {
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case PT_LOAD:
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if (a.a_magic != 0)
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errx(1, "too many loadable segments");
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filesz = xe64toh(p[i].p_filesz);
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memsz = xe64toh(p[i].p_memsz);
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offset = xe64toh(p[i].p_offset);
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a.a_magic = htoxe32(A_MAGIC);
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a.a_text = htoxe32(filesz);
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a.a_bss = htoxe32(memsz - filesz);
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a.a_entry = htoxe32(entry);
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if (write(fd, &a, sizeof(a)) != sizeof(a) ||
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write(fd, (char *)e + offset, filesz) != (ssize_t)filesz)
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err(1, NULL);
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break;
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default:
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break;
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}
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}
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return (0);
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}
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static void
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usage(void)
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{
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fprintf(stderr, "usage: elf2aout [-o outfile] infile\n");
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exit(1);
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}
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