From 5d5aa91800681d66bae766a63c23f0749d1c3883 Mon Sep 17 00:00:00 2001 From: "David E. O'Brien" Date: Thu, 28 Mar 2002 02:17:27 +0000 Subject: [PATCH] Utility to create a.out [kernels] from an ELF one. This is needed on sparc64 (and maybe all OpenFirmware based machines) as most [all?] OpenBoot PROM's require either an a.out or FCode boot image. Submitted by: jake --- usr.bin/elf2aout/elf2aout.c | 156 +++++++++++++++++++++++++++++++++++ usr.sbin/elf2aout/elf2aout.c | 156 +++++++++++++++++++++++++++++++++++ 2 files changed, 312 insertions(+) create mode 100644 usr.bin/elf2aout/elf2aout.c create mode 100644 usr.sbin/elf2aout/elf2aout.c diff --git a/usr.bin/elf2aout/elf2aout.c b/usr.bin/elf2aout/elf2aout.c new file mode 100644 index 000000000000..71df171163db --- /dev/null +++ b/usr.bin/elf2aout/elf2aout.c @@ -0,0 +1,156 @@ +/*- + * Copyright (c) 2002 Jake Burkholder + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include +__FBSDID("$FreeBSD$"); + +#include +#include +#include +#include + +#include +#include + +#define be16toh(x) (x) +#define be32toh(x) (x) +#define be64toh(x) (x) +#define htobe32(x) (x) + +struct exec { + u_int a_magic; + u_int a_text; + u_int a_data; + u_int a_bss; + u_int a_syms; + u_int a_entry; + u_int a_trsize; + u_int a_drsize; +}; +#define A_MAGIC 0x01030107 + +extern char *optarg; +extern int optind; + +static void usage(void); + +/* + * elf to a.out converter for freebsd/sparc64 bootblocks. + */ +int +main(int ac, char **av) +{ + Elf64_Quarter phentsize; + Elf64_Quarter machine; + Elf64_Quarter phnum; + Elf64_Size filesz; + Elf64_Size memsz; + Elf64_Addr entry; + Elf64_Off offset; + Elf64_Off phoff; + Elf64_Half type; + struct stat sb; + struct exec a; + Elf64_Phdr *p; + Elf64_Ehdr *e; + void *v; + int efd; + int fd; + int c; + int i; + + while ((c = getopt(ac, av, "o:")) != -1) + switch (c) { + case 'o': + if ((fd = open(optarg, O_CREAT|O_RDWR, 0644)) < 0) + err(1, "%s", optarg); + break; + case '?': + default: + usage(); + } + ac -= optind; + av += optind; + if (ac == 0) + usage(); + + if ((efd = open(*av, O_RDONLY)) < 0 || fstat(efd, &sb) < 0) + err(1, NULL); + v = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, efd, 0); + if ((e = v) == MAP_FAILED) + err(1, NULL); + + if (!IS_ELF(*e)) + errx(1, "not an elf file"); + if (e->e_ident[EI_CLASS] != ELFCLASS64) + errx(1, "wrong class"); + if (e->e_ident[EI_DATA] != ELFDATA2MSB) + errx(1, "wrong data format"); + if (e->e_ident[EI_VERSION] != EV_CURRENT) + errx(1, "wrong elf version"); + machine = be16toh(e->e_machine); + if (machine != EM_SPARCV9) + errx(1, "wrong machine type"); + phentsize = be16toh(e->e_phentsize); + if (phentsize != sizeof(*p)) + errx(1, "phdr size mismatch"); + + entry = be64toh(e->e_entry); + phoff = be64toh(e->e_phoff); + phnum = be16toh(e->e_phnum); + p = (Elf64_Phdr *)((char *)e + phoff); + bzero(&a, sizeof(a)); + for (i = 0; i < phnum; i++) { + type = be32toh(p[i].p_type); + switch (type) { + case PT_LOAD: + if (a.a_magic != 0) + errx(1, "too many loadable segments"); + filesz = be64toh(p[i].p_filesz); + memsz = be64toh(p[i].p_memsz); + offset = be64toh(p[i].p_offset); + a.a_magic = htobe32(A_MAGIC); + a.a_text = htobe32(filesz); + a.a_bss = htobe32(memsz - filesz); + a.a_entry = htobe32(entry); + if (write(fd, &a, sizeof(a)) != sizeof(a) || + write(fd, (char *)e + offset, filesz) != filesz) + err(1, NULL); + break; + default: + break; + } + } + + return (0); +} + +static void +usage(void) +{ + + errx(1, "usage: elftoaout -o outfile infile"); +} diff --git a/usr.sbin/elf2aout/elf2aout.c b/usr.sbin/elf2aout/elf2aout.c new file mode 100644 index 000000000000..71df171163db --- /dev/null +++ b/usr.sbin/elf2aout/elf2aout.c @@ -0,0 +1,156 @@ +/*- + * Copyright (c) 2002 Jake Burkholder + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include +__FBSDID("$FreeBSD$"); + +#include +#include +#include +#include + +#include +#include + +#define be16toh(x) (x) +#define be32toh(x) (x) +#define be64toh(x) (x) +#define htobe32(x) (x) + +struct exec { + u_int a_magic; + u_int a_text; + u_int a_data; + u_int a_bss; + u_int a_syms; + u_int a_entry; + u_int a_trsize; + u_int a_drsize; +}; +#define A_MAGIC 0x01030107 + +extern char *optarg; +extern int optind; + +static void usage(void); + +/* + * elf to a.out converter for freebsd/sparc64 bootblocks. + */ +int +main(int ac, char **av) +{ + Elf64_Quarter phentsize; + Elf64_Quarter machine; + Elf64_Quarter phnum; + Elf64_Size filesz; + Elf64_Size memsz; + Elf64_Addr entry; + Elf64_Off offset; + Elf64_Off phoff; + Elf64_Half type; + struct stat sb; + struct exec a; + Elf64_Phdr *p; + Elf64_Ehdr *e; + void *v; + int efd; + int fd; + int c; + int i; + + while ((c = getopt(ac, av, "o:")) != -1) + switch (c) { + case 'o': + if ((fd = open(optarg, O_CREAT|O_RDWR, 0644)) < 0) + err(1, "%s", optarg); + break; + case '?': + default: + usage(); + } + ac -= optind; + av += optind; + if (ac == 0) + usage(); + + if ((efd = open(*av, O_RDONLY)) < 0 || fstat(efd, &sb) < 0) + err(1, NULL); + v = mmap(NULL, sb.st_size, PROT_READ, MAP_SHARED, efd, 0); + if ((e = v) == MAP_FAILED) + err(1, NULL); + + if (!IS_ELF(*e)) + errx(1, "not an elf file"); + if (e->e_ident[EI_CLASS] != ELFCLASS64) + errx(1, "wrong class"); + if (e->e_ident[EI_DATA] != ELFDATA2MSB) + errx(1, "wrong data format"); + if (e->e_ident[EI_VERSION] != EV_CURRENT) + errx(1, "wrong elf version"); + machine = be16toh(e->e_machine); + if (machine != EM_SPARCV9) + errx(1, "wrong machine type"); + phentsize = be16toh(e->e_phentsize); + if (phentsize != sizeof(*p)) + errx(1, "phdr size mismatch"); + + entry = be64toh(e->e_entry); + phoff = be64toh(e->e_phoff); + phnum = be16toh(e->e_phnum); + p = (Elf64_Phdr *)((char *)e + phoff); + bzero(&a, sizeof(a)); + for (i = 0; i < phnum; i++) { + type = be32toh(p[i].p_type); + switch (type) { + case PT_LOAD: + if (a.a_magic != 0) + errx(1, "too many loadable segments"); + filesz = be64toh(p[i].p_filesz); + memsz = be64toh(p[i].p_memsz); + offset = be64toh(p[i].p_offset); + a.a_magic = htobe32(A_MAGIC); + a.a_text = htobe32(filesz); + a.a_bss = htobe32(memsz - filesz); + a.a_entry = htobe32(entry); + if (write(fd, &a, sizeof(a)) != sizeof(a) || + write(fd, (char *)e + offset, filesz) != filesz) + err(1, NULL); + break; + default: + break; + } + } + + return (0); +} + +static void +usage(void) +{ + + errx(1, "usage: elftoaout -o outfile infile"); +}