freebsd-src/usr.sbin/btxld/elfh.c
2024-04-28 21:24:47 -06:00

126 lines
4.4 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 1998 Robert Nordier
* 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/param.h>
#include <sys/endian.h>
#include <stddef.h>
#include "elfh.h"
#define SET_ME 0xeeeeeeee /* filled in by btxld */
/*
* ELF header template.
*/
const struct elfh elfhdr = {
{
{
ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3, /* e_ident */
ELFCLASS32, ELFDATA2LSB, EV_CURRENT, 0,
'F', 'r', 'e', 'e', 'B', 'S', 'D', 0
},
htole16(ET_EXEC), /* e_type */
htole16(EM_386), /* e_machine */
htole32(EV_CURRENT), /* e_version */
htole32(SET_ME), /* e_entry */
htole32(offsetof(struct elfh, p)), /* e_phoff */
htole32(offsetof(struct elfh, sh)), /* e_shoff */
0, /* e_flags */
htole16(sizeof(elfhdr.e)), /* e_ehsize */
htole16(sizeof(elfhdr.p[0])), /* e_phentsize */
htole16(nitems(elfhdr.p)), /* e_phnum */
htole16(sizeof(elfhdr.sh[0])), /* e_shentsize */
htole16(nitems(elfhdr.sh)), /* e_shnum */
htole16(1) /* e_shstrndx */
},
{
{
htole32(PT_LOAD), /* p_type */
htole32(sizeof(elfhdr)), /* p_offset */
htole32(SET_ME), /* p_vaddr */
htole32(SET_ME), /* p_paddr */
htole32(SET_ME), /* p_filesz */
htole32(SET_ME), /* p_memsz */
htole32(PF_R | PF_X), /* p_flags */
htole32(0x1000) /* p_align */
},
{
htole32(PT_LOAD), /* p_type */
htole32(SET_ME), /* p_offset */
htole32(SET_ME), /* p_vaddr */
htole32(SET_ME), /* p_paddr */
htole32(SET_ME), /* p_filesz */
htole32(SET_ME), /* p_memsz */
htole32(PF_R | PF_W), /* p_flags */
htole32(0x1000) /* p_align */
}
},
{
{
0, htole32(SHT_NULL), 0, 0, 0, 0, htole32(SHN_UNDEF), 0, 0, 0
},
{
htole32(1), /* sh_name */
htole32(SHT_STRTAB), /* sh_type */
0, /* sh_flags */
0, /* sh_addr */
htole32(offsetof(struct elfh, shstrtab)), /* sh_offset */
htole32(sizeof(elfhdr.shstrtab)), /* sh_size */
htole32(SHN_UNDEF), /* sh_link */
0, /* sh_info */
htole32(1), /* sh_addralign */
0 /* sh_entsize */
},
{
htole32(0xb), /* sh_name */
htole32(SHT_PROGBITS), /* sh_type */
htole32(SHF_EXECINSTR | SHF_ALLOC), /* sh_flags */
htole32(SET_ME), /* sh_addr */
htole32(SET_ME), /* sh_offset */
htole32(SET_ME), /* sh_size */
htole32(SHN_UNDEF), /* sh_link */
0, /* sh_info */
htole32(4), /* sh_addralign */
0 /* sh_entsize */
},
{
htole32(0x11), /* sh_name */
htole32(SHT_PROGBITS), /* sh_type */
htole32(SHF_ALLOC | SHF_WRITE), /* sh_flags */
htole32(SET_ME), /* sh_addr */
htole32(SET_ME), /* sh_offset */
htole32(SET_ME), /* sh_size */
htole32(SHN_UNDEF), /* sh_link */
0, /* sh_info */
htole32(4), /* sh_addralign */
0 /* sh_entsize */
}
},
"\0.shstrtab\0.text\0.data" /* shstrtab */
};