diff options
Diffstat (limited to 'usr.bin/elf2aout')
| -rw-r--r-- | usr.bin/elf2aout/Makefile | 8 | ||||
| -rw-r--r-- | usr.bin/elf2aout/elf2aout.1 | 64 | ||||
| -rw-r--r-- | usr.bin/elf2aout/elf2aout.c | 159 |
3 files changed, 231 insertions, 0 deletions
diff --git a/usr.bin/elf2aout/Makefile b/usr.bin/elf2aout/Makefile new file mode 100644 index 000000000000..4ba44e7e3dc1 --- /dev/null +++ b/usr.bin/elf2aout/Makefile @@ -0,0 +1,8 @@ +# $FreeBSD$ + +PROG= elf2aout + +NO_WERROR= +WARNS?= 5 + +.include <bsd.prog.mk> diff --git a/usr.bin/elf2aout/elf2aout.1 b/usr.bin/elf2aout/elf2aout.1 new file mode 100644 index 000000000000..7b153e9b2432 --- /dev/null +++ b/usr.bin/elf2aout/elf2aout.1 @@ -0,0 +1,64 @@ +.\" Copyright (c) 2008 Tom Rhodes +.\" 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. +.\" +.\" $FreeBSD$ +.\" +.Dd December 23, 2008 +.Dt ELF2AOUT 1 +.Os +.Sh NAME +.Nm elf2aout +.Nd "Convert ELF binary to a.out format" +.Sh SYNOPSIS +.Nm +.Op Fl o outfile +.Ar infile +.Sh DESCRIPTION +The +.Nm +utility is used to convert an ELF formatted binary, +namely a kernel, to an a.out formatted one. +Most +.Tn OpenBoot +firmware require an a.out format or FCode boot image +and this utility is designed to accommodate. +If +.Ar infile +is not in ELF format, an error message will be presented. +.Sh SEE ALSO +.Xr elf 3 , +.Xr a.out 5 +.Sh HISTORY +The +.Nm +utility first appeared in +.Fx 4.6 . +.Sh AUTHORS +.An -nosplit +The +.Nm +utility was written by +.An Jake Burkholder Aq jake@FreeBSD.org . +This manual page was written by +.An Tom Rhodes Aq trhodes@FreeBSD.org . diff --git a/usr.bin/elf2aout/elf2aout.c b/usr.bin/elf2aout/elf2aout.c new file mode 100644 index 000000000000..4168f4e60560 --- /dev/null +++ b/usr.bin/elf2aout/elf2aout.c @@ -0,0 +1,159 @@ +/*- + * 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 <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +#include <sys/types.h> +#include <sys/elf64.h> +#include <sys/endian.h> +#include <sys/mman.h> +#include <sys/stat.h> + +#include <err.h> +#include <fcntl.h> +#include <string.h> +#include <unistd.h> + +#define xe16toh(x) ((data == ELFDATA2MSB) ? be16toh(x) : le16toh(x)) +#define xe32toh(x) ((data == ELFDATA2MSB) ? be32toh(x) : le32toh(x)) +#define xe64toh(x) ((data == ELFDATA2MSB) ? be64toh(x) : le64toh(x)) +#define htoxe32(x) ((data == ELFDATA2MSB) ? htobe32(x) : htole32(x)) + +struct exec { + u_int32_t a_magic; + u_int32_t a_text; + u_int32_t a_data; + u_int32_t a_bss; + u_int32_t a_syms; + u_int32_t a_entry; + u_int32_t a_trsize; + u_int32_t a_drsize; +}; +#define A_MAGIC 0x01030107 + +static void usage(void); + +/* + * elf to a.out converter for freebsd/sparc64 bootblocks. + */ +int +main(int ac, char **av) +{ + Elf64_Half phentsize; + Elf64_Half machine; + Elf64_Half phnum; + Elf64_Xword filesz; + Elf64_Xword memsz; + Elf64_Addr entry; + Elf64_Off offset; + Elf64_Off phoff; + Elf64_Word type; + unsigned char data; + struct stat sb; + struct exec a; + Elf64_Phdr *p; + Elf64_Ehdr *e; + void *v; + int efd; + int fd; + int c; + int i; + + fd = STDIN_FILENO; + 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"); + data = e->e_ident[EI_DATA]; + if (data != ELFDATA2MSB && data != ELFDATA2LSB) + errx(1, "wrong data format"); + if (e->e_ident[EI_VERSION] != EV_CURRENT) + errx(1, "wrong elf version"); + machine = xe16toh(e->e_machine); + if (machine != EM_SPARCV9 && machine != EM_ALPHA) + errx(1, "wrong machine type"); + phentsize = xe16toh(e->e_phentsize); + if (phentsize != sizeof(*p)) + errx(1, "phdr size mismatch"); + + entry = xe64toh(e->e_entry); + phoff = xe64toh(e->e_phoff); + phnum = xe16toh(e->e_phnum); + p = (Elf64_Phdr *)((char *)e + phoff); + bzero(&a, sizeof(a)); + for (i = 0; i < phnum; i++) { + type = xe32toh(p[i].p_type); + switch (type) { + case PT_LOAD: + if (a.a_magic != 0) + errx(1, "too many loadable segments"); + filesz = xe64toh(p[i].p_filesz); + memsz = xe64toh(p[i].p_memsz); + offset = xe64toh(p[i].p_offset); + a.a_magic = htoxe32(A_MAGIC); + a.a_text = htoxe32(filesz); + a.a_bss = htoxe32(memsz - filesz); + a.a_entry = htoxe32(entry); + if (write(fd, &a, sizeof(a)) != sizeof(a) || + write(fd, (char *)e + offset, filesz) != (ssize_t)filesz) + err(1, NULL); + break; + default: + break; + } + } + + return (0); +} + +static void +usage(void) +{ + + errx(1, "usage: elf2aout [-o outfile] infile"); +} |