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1275 |
phoenix |
/*
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* Copyright (c) 1995
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* Ted Lemon (hereinafter referred to as the author)
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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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 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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/* elf2ecoff.c
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This program converts an elf executable to an ECOFF executable.
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No symbol table is retained. This is useful primarily in building
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net-bootable kernels for machines (e.g., DECstation and Alpha) which
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only support the ECOFF object file format. */
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#include <stdio.h>
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#include <string.h>
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| 38 |
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#include <errno.h>
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| 39 |
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#include <sys/types.h>
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| 40 |
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#include <fcntl.h>
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#include <unistd.h>
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#include <elf.h>
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#include <limits.h>
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#include <netinet/in.h>
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#include <stdlib.h>
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#include "ecoff.h"
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| 49 |
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/*
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* Some extra ELF definitions
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*/
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#define PT_MIPS_REGINFO 0x70000000 /* Register usage information */
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| 53 |
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| 54 |
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/* -------------------------------------------------------------------- */
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| 55 |
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| 56 |
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struct sect {
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unsigned long vaddr;
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unsigned long len;
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};
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| 61 |
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int *symTypeTable;
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int must_convert_endian = 0;
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int format_bigendian = 0;
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static void copy(int out, int in, off_t offset, off_t size)
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{
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char ibuf[4096];
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int remaining, cur, count;
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/* Go to the start of the ELF symbol table... */
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if (lseek(in, offset, SEEK_SET) < 0) {
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perror("copy: lseek");
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exit(1);
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}
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remaining = size;
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while (remaining) {
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cur = remaining;
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if (cur > sizeof(ibuf))
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cur = sizeof(ibuf);
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remaining -= cur;
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if ((count = read(in, ibuf, cur)) != cur) {
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fprintf(stderr, "copy: read: %s\n",
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count ? strerror(errno) :
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"premature end of file");
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exit(1);
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}
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if ((count = write(out, ibuf, cur)) != cur) {
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perror("copy: write");
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| 90 |
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exit(1);
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}
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}
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}
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| 95 |
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/*
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* Combine two segments, which must be contiguous. If pad is true, it's
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* okay for there to be padding between.
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*/
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static void combine(struct sect *base, struct sect *new, int pad)
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{
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if (!base->len)
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*base = *new;
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| 103 |
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else if (new->len) {
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| 104 |
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if (base->vaddr + base->len != new->vaddr) {
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| 105 |
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if (pad)
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base->len = new->vaddr - base->vaddr;
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else {
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fprintf(stderr,
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"Non-contiguous data can't be converted.\n");
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exit(1);
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}
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}
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base->len += new->len;
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}
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}
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static int phcmp(const void *v1, const void *v2)
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{
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const Elf32_Phdr *h1 = v1;
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const Elf32_Phdr *h2 = v2;
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| 122 |
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if (h1->p_vaddr > h2->p_vaddr)
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return 1;
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else if (h1->p_vaddr < h2->p_vaddr)
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return -1;
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else
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return 0;
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}
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| 130 |
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static char *saveRead(int file, off_t offset, off_t len, char *name)
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{
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char *tmp;
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int count;
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off_t off;
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if ((off = lseek(file, offset, SEEK_SET)) < 0) {
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fprintf(stderr, "%s: fseek: %s\n", name, strerror(errno));
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exit(1);
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}
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| 139 |
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if (!(tmp = (char *) malloc(len))) {
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fprintf(stderr, "%s: Can't allocate %ld bytes.\n", name,
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len);
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exit(1);
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| 143 |
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}
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count = read(file, tmp, len);
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| 145 |
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if (count != len) {
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fprintf(stderr, "%s: read: %s.\n",
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name,
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count ? strerror(errno) : "End of file reached");
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exit(1);
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| 150 |
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}
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return tmp;
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}
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| 154 |
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#define swab16(x) \
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((unsigned short)( \
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(((unsigned short)(x) & (unsigned short)0x00ffU) << 8) | \
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| 157 |
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(((unsigned short)(x) & (unsigned short)0xff00U) >> 8) ))
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| 158 |
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| 159 |
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#define swab32(x) \
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((unsigned int)( \
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(((unsigned int)(x) & (unsigned int)0x000000ffUL) << 24) | \
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(((unsigned int)(x) & (unsigned int)0x0000ff00UL) << 8) | \
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(((unsigned int)(x) & (unsigned int)0x00ff0000UL) >> 8) | \
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(((unsigned int)(x) & (unsigned int)0xff000000UL) >> 24) ))
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static void convert_elf_hdr(Elf32_Ehdr * e)
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{
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e->e_type = swab16(e->e_type);
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e->e_machine = swab16(e->e_machine);
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e->e_version = swab32(e->e_version);
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e->e_entry = swab32(e->e_entry);
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e->e_phoff = swab32(e->e_phoff);
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e->e_shoff = swab32(e->e_shoff);
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e->e_flags = swab32(e->e_flags);
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e->e_ehsize = swab16(e->e_ehsize);
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e->e_phentsize = swab16(e->e_phentsize);
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e->e_phnum = swab16(e->e_phnum);
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e->e_shentsize = swab16(e->e_shentsize);
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| 179 |
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e->e_shnum = swab16(e->e_shnum);
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| 180 |
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e->e_shstrndx = swab16(e->e_shstrndx);
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| 181 |
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}
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| 182 |
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| 183 |
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static void convert_elf_phdrs(Elf32_Phdr * p, int num)
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| 184 |
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{
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| 185 |
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int i;
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| 186 |
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| 187 |
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for (i = 0; i < num; i++, p++) {
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| 188 |
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p->p_type = swab32(p->p_type);
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| 189 |
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p->p_offset = swab32(p->p_offset);
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| 190 |
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p->p_vaddr = swab32(p->p_vaddr);
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| 191 |
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p->p_paddr = swab32(p->p_paddr);
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| 192 |
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p->p_filesz = swab32(p->p_filesz);
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| 193 |
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p->p_memsz = swab32(p->p_memsz);
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| 194 |
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p->p_flags = swab32(p->p_flags);
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| 195 |
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p->p_align = swab32(p->p_align);
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| 196 |
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}
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| 197 |
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| 198 |
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}
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| 199 |
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| 200 |
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static void convert_elf_shdrs(Elf32_Shdr * s, int num)
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| 201 |
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{
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| 202 |
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int i;
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| 203 |
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| 204 |
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for (i = 0; i < num; i++, s++) {
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| 205 |
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s->sh_name = swab32(s->sh_name);
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| 206 |
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s->sh_type = swab32(s->sh_type);
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| 207 |
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s->sh_flags = swab32(s->sh_flags);
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| 208 |
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s->sh_addr = swab32(s->sh_addr);
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| 209 |
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s->sh_offset = swab32(s->sh_offset);
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| 210 |
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s->sh_size = swab32(s->sh_size);
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| 211 |
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s->sh_link = swab32(s->sh_link);
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| 212 |
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s->sh_info = swab32(s->sh_info);
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| 213 |
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s->sh_addralign = swab32(s->sh_addralign);
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| 214 |
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s->sh_entsize = swab32(s->sh_entsize);
|
| 215 |
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}
|
| 216 |
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}
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| 217 |
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|
| 218 |
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static void convert_ecoff_filehdr(struct filehdr *f)
|
| 219 |
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{
|
| 220 |
|
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f->f_magic = swab16(f->f_magic);
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| 221 |
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f->f_nscns = swab16(f->f_nscns);
|
| 222 |
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f->f_timdat = swab32(f->f_timdat);
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| 223 |
|
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f->f_symptr = swab32(f->f_symptr);
|
| 224 |
|
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f->f_nsyms = swab32(f->f_nsyms);
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| 225 |
|
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f->f_opthdr = swab16(f->f_opthdr);
|
| 226 |
|
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f->f_flags = swab16(f->f_flags);
|
| 227 |
|
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}
|
| 228 |
|
|
|
| 229 |
|
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static void convert_ecoff_aouthdr(struct aouthdr *a)
|
| 230 |
|
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{
|
| 231 |
|
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a->magic = swab16(a->magic);
|
| 232 |
|
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a->vstamp = swab16(a->vstamp);
|
| 233 |
|
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a->tsize = swab32(a->tsize);
|
| 234 |
|
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a->dsize = swab32(a->dsize);
|
| 235 |
|
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a->bsize = swab32(a->bsize);
|
| 236 |
|
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a->entry = swab32(a->entry);
|
| 237 |
|
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a->text_start = swab32(a->text_start);
|
| 238 |
|
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a->data_start = swab32(a->data_start);
|
| 239 |
|
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a->bss_start = swab32(a->bss_start);
|
| 240 |
|
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a->gprmask = swab32(a->gprmask);
|
| 241 |
|
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a->cprmask[0] = swab32(a->cprmask[0]);
|
| 242 |
|
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a->cprmask[1] = swab32(a->cprmask[1]);
|
| 243 |
|
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a->cprmask[2] = swab32(a->cprmask[2]);
|
| 244 |
|
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a->cprmask[3] = swab32(a->cprmask[3]);
|
| 245 |
|
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a->gp_value = swab32(a->gp_value);
|
| 246 |
|
|
}
|
| 247 |
|
|
|
| 248 |
|
|
static void convert_ecoff_esecs(struct scnhdr *s, int num)
|
| 249 |
|
|
{
|
| 250 |
|
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int i;
|
| 251 |
|
|
|
| 252 |
|
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for (i = 0; i < num; i++, s++) {
|
| 253 |
|
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s->s_paddr = swab32(s->s_paddr);
|
| 254 |
|
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s->s_vaddr = swab32(s->s_vaddr);
|
| 255 |
|
|
s->s_size = swab32(s->s_size);
|
| 256 |
|
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s->s_scnptr = swab32(s->s_scnptr);
|
| 257 |
|
|
s->s_relptr = swab32(s->s_relptr);
|
| 258 |
|
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s->s_lnnoptr = swab32(s->s_lnnoptr);
|
| 259 |
|
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s->s_nreloc = swab16(s->s_nreloc);
|
| 260 |
|
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s->s_nlnno = swab16(s->s_nlnno);
|
| 261 |
|
|
s->s_flags = swab32(s->s_flags);
|
| 262 |
|
|
}
|
| 263 |
|
|
}
|
| 264 |
|
|
|
| 265 |
|
|
int main(int argc, char *argv[])
|
| 266 |
|
|
{
|
| 267 |
|
|
Elf32_Ehdr ex;
|
| 268 |
|
|
Elf32_Phdr *ph;
|
| 269 |
|
|
Elf32_Shdr *sh;
|
| 270 |
|
|
char *shstrtab;
|
| 271 |
|
|
int i, pad;
|
| 272 |
|
|
struct sect text, data, bss;
|
| 273 |
|
|
struct filehdr efh;
|
| 274 |
|
|
struct aouthdr eah;
|
| 275 |
|
|
struct scnhdr esecs[6];
|
| 276 |
|
|
int infile, outfile;
|
| 277 |
|
|
unsigned long cur_vma = ULONG_MAX;
|
| 278 |
|
|
int addflag = 0;
|
| 279 |
|
|
int nosecs;
|
| 280 |
|
|
|
| 281 |
|
|
text.len = data.len = bss.len = 0;
|
| 282 |
|
|
text.vaddr = data.vaddr = bss.vaddr = 0;
|
| 283 |
|
|
|
| 284 |
|
|
/* Check args... */
|
| 285 |
|
|
if (argc < 3 || argc > 4) {
|
| 286 |
|
|
usage:
|
| 287 |
|
|
fprintf(stderr,
|
| 288 |
|
|
"usage: elf2ecoff <elf executable> <ecoff executable> [-a]\n");
|
| 289 |
|
|
exit(1);
|
| 290 |
|
|
}
|
| 291 |
|
|
if (argc == 4) {
|
| 292 |
|
|
if (strcmp(argv[3], "-a"))
|
| 293 |
|
|
goto usage;
|
| 294 |
|
|
addflag = 1;
|
| 295 |
|
|
}
|
| 296 |
|
|
|
| 297 |
|
|
/* Try the input file... */
|
| 298 |
|
|
if ((infile = open(argv[1], O_RDONLY)) < 0) {
|
| 299 |
|
|
fprintf(stderr, "Can't open %s for read: %s\n",
|
| 300 |
|
|
argv[1], strerror(errno));
|
| 301 |
|
|
exit(1);
|
| 302 |
|
|
}
|
| 303 |
|
|
|
| 304 |
|
|
/* Read the header, which is at the beginning of the file... */
|
| 305 |
|
|
i = read(infile, &ex, sizeof(ex));
|
| 306 |
|
|
if (i != sizeof(ex)) {
|
| 307 |
|
|
fprintf(stderr, "ex: %s: %s.\n", argv[1],
|
| 308 |
|
|
i ? strerror(errno) : "End of file reached");
|
| 309 |
|
|
exit(1);
|
| 310 |
|
|
}
|
| 311 |
|
|
|
| 312 |
|
|
if (ex.e_ident[EI_DATA] == ELFDATA2MSB)
|
| 313 |
|
|
format_bigendian = 1;
|
| 314 |
|
|
|
| 315 |
|
|
if (ntohs(0xaa55) == 0xaa55) {
|
| 316 |
|
|
if (!format_bigendian)
|
| 317 |
|
|
must_convert_endian = 1;
|
| 318 |
|
|
} else {
|
| 319 |
|
|
if (format_bigendian)
|
| 320 |
|
|
must_convert_endian = 1;
|
| 321 |
|
|
}
|
| 322 |
|
|
if (must_convert_endian)
|
| 323 |
|
|
convert_elf_hdr(&ex);
|
| 324 |
|
|
|
| 325 |
|
|
/* Read the program headers... */
|
| 326 |
|
|
ph = (Elf32_Phdr *) saveRead(infile, ex.e_phoff,
|
| 327 |
|
|
ex.e_phnum * sizeof(Elf32_Phdr), "ph");
|
| 328 |
|
|
if (must_convert_endian)
|
| 329 |
|
|
convert_elf_phdrs(ph, ex.e_phnum);
|
| 330 |
|
|
/* Read the section headers... */
|
| 331 |
|
|
sh = (Elf32_Shdr *) saveRead(infile, ex.e_shoff,
|
| 332 |
|
|
ex.e_shnum * sizeof(Elf32_Shdr),
|
| 333 |
|
|
"sh");
|
| 334 |
|
|
if (must_convert_endian)
|
| 335 |
|
|
convert_elf_shdrs(sh, ex.e_shnum);
|
| 336 |
|
|
/* Read in the section string table. */
|
| 337 |
|
|
shstrtab = saveRead(infile, sh[ex.e_shstrndx].sh_offset,
|
| 338 |
|
|
sh[ex.e_shstrndx].sh_size, "shstrtab");
|
| 339 |
|
|
|
| 340 |
|
|
/* Figure out if we can cram the program header into an ECOFF
|
| 341 |
|
|
header... Basically, we can't handle anything but loadable
|
| 342 |
|
|
segments, but we can ignore some kinds of segments. We can't
|
| 343 |
|
|
handle holes in the address space. Segments may be out of order,
|
| 344 |
|
|
so we sort them first. */
|
| 345 |
|
|
|
| 346 |
|
|
qsort(ph, ex.e_phnum, sizeof(Elf32_Phdr), phcmp);
|
| 347 |
|
|
|
| 348 |
|
|
for (i = 0; i < ex.e_phnum; i++) {
|
| 349 |
|
|
/* Section types we can ignore... */
|
| 350 |
|
|
if (ph[i].p_type == PT_NULL || ph[i].p_type == PT_NOTE ||
|
| 351 |
|
|
ph[i].p_type == PT_PHDR
|
| 352 |
|
|
|| ph[i].p_type == PT_MIPS_REGINFO)
|
| 353 |
|
|
continue;
|
| 354 |
|
|
/* Section types we can't handle... */
|
| 355 |
|
|
else if (ph[i].p_type != PT_LOAD) {
|
| 356 |
|
|
fprintf(stderr,
|
| 357 |
|
|
"Program header %d type %d can't be converted.\n",
|
| 358 |
|
|
ex.e_phnum, ph[i].p_type);
|
| 359 |
|
|
exit(1);
|
| 360 |
|
|
}
|
| 361 |
|
|
/* Writable (data) segment? */
|
| 362 |
|
|
if (ph[i].p_flags & PF_W) {
|
| 363 |
|
|
struct sect ndata, nbss;
|
| 364 |
|
|
|
| 365 |
|
|
ndata.vaddr = ph[i].p_vaddr;
|
| 366 |
|
|
ndata.len = ph[i].p_filesz;
|
| 367 |
|
|
nbss.vaddr = ph[i].p_vaddr + ph[i].p_filesz;
|
| 368 |
|
|
nbss.len = ph[i].p_memsz - ph[i].p_filesz;
|
| 369 |
|
|
|
| 370 |
|
|
combine(&data, &ndata, 0);
|
| 371 |
|
|
combine(&bss, &nbss, 1);
|
| 372 |
|
|
} else {
|
| 373 |
|
|
struct sect ntxt;
|
| 374 |
|
|
|
| 375 |
|
|
ntxt.vaddr = ph[i].p_vaddr;
|
| 376 |
|
|
ntxt.len = ph[i].p_filesz;
|
| 377 |
|
|
|
| 378 |
|
|
combine(&text, &ntxt, 0);
|
| 379 |
|
|
}
|
| 380 |
|
|
/* Remember the lowest segment start address. */
|
| 381 |
|
|
if (ph[i].p_vaddr < cur_vma)
|
| 382 |
|
|
cur_vma = ph[i].p_vaddr;
|
| 383 |
|
|
}
|
| 384 |
|
|
|
| 385 |
|
|
/* Sections must be in order to be converted... */
|
| 386 |
|
|
if (text.vaddr > data.vaddr || data.vaddr > bss.vaddr ||
|
| 387 |
|
|
text.vaddr + text.len > data.vaddr
|
| 388 |
|
|
|| data.vaddr + data.len > bss.vaddr) {
|
| 389 |
|
|
fprintf(stderr,
|
| 390 |
|
|
"Sections ordering prevents a.out conversion.\n");
|
| 391 |
|
|
exit(1);
|
| 392 |
|
|
}
|
| 393 |
|
|
|
| 394 |
|
|
/*
|
| 395 |
|
|
* If there's a data section but no text section, then the loader
|
| 396 |
|
|
* combined everything into one section. That needs to be the text
|
| 397 |
|
|
* section, so just make the data section zero length following text.
|
| 398 |
|
|
*/
|
| 399 |
|
|
if (data.len && !text.len) {
|
| 400 |
|
|
text = data;
|
| 401 |
|
|
data.vaddr = text.vaddr + text.len;
|
| 402 |
|
|
data.len = 0;
|
| 403 |
|
|
}
|
| 404 |
|
|
|
| 405 |
|
|
/*
|
| 406 |
|
|
* If there is a gap between text and data, we'll fill it when we copy
|
| 407 |
|
|
* the data, so update the length of the text segment as represented in
|
| 408 |
|
|
* a.out to reflect that, since a.out doesn't allow gaps in the program
|
| 409 |
|
|
* address space.
|
| 410 |
|
|
*/
|
| 411 |
|
|
if (text.vaddr + text.len < data.vaddr)
|
| 412 |
|
|
text.len = data.vaddr - text.vaddr;
|
| 413 |
|
|
|
| 414 |
|
|
/* We now have enough information to cons up an a.out header... */
|
| 415 |
|
|
eah.magic = OMAGIC;
|
| 416 |
|
|
eah.vstamp = 200;
|
| 417 |
|
|
eah.tsize = text.len;
|
| 418 |
|
|
eah.dsize = data.len;
|
| 419 |
|
|
eah.bsize = bss.len;
|
| 420 |
|
|
eah.entry = ex.e_entry;
|
| 421 |
|
|
eah.text_start = text.vaddr;
|
| 422 |
|
|
eah.data_start = data.vaddr;
|
| 423 |
|
|
eah.bss_start = bss.vaddr;
|
| 424 |
|
|
eah.gprmask = 0xf3fffffe;
|
| 425 |
|
|
memset(&eah.cprmask, '\0', sizeof(eah.cprmask));
|
| 426 |
|
|
eah.gp_value = 0; /* unused. */
|
| 427 |
|
|
|
| 428 |
|
|
if (format_bigendian)
|
| 429 |
|
|
efh.f_magic = MIPSEBMAGIC;
|
| 430 |
|
|
else
|
| 431 |
|
|
efh.f_magic = MIPSELMAGIC;
|
| 432 |
|
|
if (addflag)
|
| 433 |
|
|
nosecs = 6;
|
| 434 |
|
|
else
|
| 435 |
|
|
nosecs = 3;
|
| 436 |
|
|
efh.f_nscns = nosecs;
|
| 437 |
|
|
efh.f_timdat = 0; /* bogus */
|
| 438 |
|
|
efh.f_symptr = 0;
|
| 439 |
|
|
efh.f_nsyms = 0;
|
| 440 |
|
|
efh.f_opthdr = sizeof(eah);
|
| 441 |
|
|
efh.f_flags = 0x100f; /* Stripped, not sharable. */
|
| 442 |
|
|
|
| 443 |
|
|
memset(esecs, 0, sizeof(esecs));
|
| 444 |
|
|
strcpy(esecs[0].s_name, ".text");
|
| 445 |
|
|
strcpy(esecs[1].s_name, ".data");
|
| 446 |
|
|
strcpy(esecs[2].s_name, ".bss");
|
| 447 |
|
|
if (addflag) {
|
| 448 |
|
|
strcpy(esecs[3].s_name, ".rdata");
|
| 449 |
|
|
strcpy(esecs[4].s_name, ".sdata");
|
| 450 |
|
|
strcpy(esecs[5].s_name, ".sbss");
|
| 451 |
|
|
}
|
| 452 |
|
|
esecs[0].s_paddr = esecs[0].s_vaddr = eah.text_start;
|
| 453 |
|
|
esecs[1].s_paddr = esecs[1].s_vaddr = eah.data_start;
|
| 454 |
|
|
esecs[2].s_paddr = esecs[2].s_vaddr = eah.bss_start;
|
| 455 |
|
|
if (addflag) {
|
| 456 |
|
|
esecs[3].s_paddr = esecs[3].s_vaddr = 0;
|
| 457 |
|
|
esecs[4].s_paddr = esecs[4].s_vaddr = 0;
|
| 458 |
|
|
esecs[5].s_paddr = esecs[5].s_vaddr = 0;
|
| 459 |
|
|
}
|
| 460 |
|
|
esecs[0].s_size = eah.tsize;
|
| 461 |
|
|
esecs[1].s_size = eah.dsize;
|
| 462 |
|
|
esecs[2].s_size = eah.bsize;
|
| 463 |
|
|
if (addflag) {
|
| 464 |
|
|
esecs[3].s_size = 0;
|
| 465 |
|
|
esecs[4].s_size = 0;
|
| 466 |
|
|
esecs[5].s_size = 0;
|
| 467 |
|
|
}
|
| 468 |
|
|
esecs[0].s_scnptr = N_TXTOFF(efh, eah);
|
| 469 |
|
|
esecs[1].s_scnptr = N_DATOFF(efh, eah);
|
| 470 |
|
|
#define ECOFF_SEGMENT_ALIGNMENT(a) 0x10
|
| 471 |
|
|
#define ECOFF_ROUND(s,a) (((s)+(a)-1)&~((a)-1))
|
| 472 |
|
|
esecs[2].s_scnptr = esecs[1].s_scnptr +
|
| 473 |
|
|
ECOFF_ROUND(esecs[1].s_size, ECOFF_SEGMENT_ALIGNMENT(&eah));
|
| 474 |
|
|
if (addflag) {
|
| 475 |
|
|
esecs[3].s_scnptr = 0;
|
| 476 |
|
|
esecs[4].s_scnptr = 0;
|
| 477 |
|
|
esecs[5].s_scnptr = 0;
|
| 478 |
|
|
}
|
| 479 |
|
|
esecs[0].s_relptr = esecs[1].s_relptr = esecs[2].s_relptr = 0;
|
| 480 |
|
|
esecs[0].s_lnnoptr = esecs[1].s_lnnoptr = esecs[2].s_lnnoptr = 0;
|
| 481 |
|
|
esecs[0].s_nreloc = esecs[1].s_nreloc = esecs[2].s_nreloc = 0;
|
| 482 |
|
|
esecs[0].s_nlnno = esecs[1].s_nlnno = esecs[2].s_nlnno = 0;
|
| 483 |
|
|
if (addflag) {
|
| 484 |
|
|
esecs[3].s_relptr = esecs[4].s_relptr
|
| 485 |
|
|
= esecs[5].s_relptr = 0;
|
| 486 |
|
|
esecs[3].s_lnnoptr = esecs[4].s_lnnoptr
|
| 487 |
|
|
= esecs[5].s_lnnoptr = 0;
|
| 488 |
|
|
esecs[3].s_nreloc = esecs[4].s_nreloc = esecs[5].s_nreloc =
|
| 489 |
|
|
0;
|
| 490 |
|
|
esecs[3].s_nlnno = esecs[4].s_nlnno = esecs[5].s_nlnno = 0;
|
| 491 |
|
|
}
|
| 492 |
|
|
esecs[0].s_flags = 0x20;
|
| 493 |
|
|
esecs[1].s_flags = 0x40;
|
| 494 |
|
|
esecs[2].s_flags = 0x82;
|
| 495 |
|
|
if (addflag) {
|
| 496 |
|
|
esecs[3].s_flags = 0x100;
|
| 497 |
|
|
esecs[4].s_flags = 0x200;
|
| 498 |
|
|
esecs[5].s_flags = 0x400;
|
| 499 |
|
|
}
|
| 500 |
|
|
|
| 501 |
|
|
/* Make the output file... */
|
| 502 |
|
|
if ((outfile = open(argv[2], O_WRONLY | O_CREAT, 0777)) < 0) {
|
| 503 |
|
|
fprintf(stderr, "Unable to create %s: %s\n", argv[2],
|
| 504 |
|
|
strerror(errno));
|
| 505 |
|
|
exit(1);
|
| 506 |
|
|
}
|
| 507 |
|
|
|
| 508 |
|
|
if (must_convert_endian)
|
| 509 |
|
|
convert_ecoff_filehdr(&efh);
|
| 510 |
|
|
/* Write the headers... */
|
| 511 |
|
|
i = write(outfile, &efh, sizeof(efh));
|
| 512 |
|
|
if (i != sizeof efh) {
|
| 513 |
|
|
perror("efh: write");
|
| 514 |
|
|
exit(1);
|
| 515 |
|
|
}
|
| 516 |
|
|
|
| 517 |
|
|
for (i = 0; i < nosecs; i++) {
|
| 518 |
|
|
printf("Section %d: %s phys %lx size %lx file offset %lx\n",
|
| 519 |
|
|
i, esecs[i].s_name, esecs[i].s_paddr,
|
| 520 |
|
|
esecs[i].s_size, esecs[i].s_scnptr);
|
| 521 |
|
|
}
|
| 522 |
|
|
fprintf(stderr, "wrote %d byte file header.\n", i);
|
| 523 |
|
|
|
| 524 |
|
|
if (must_convert_endian)
|
| 525 |
|
|
convert_ecoff_aouthdr(&eah);
|
| 526 |
|
|
i = write(outfile, &eah, sizeof(eah));
|
| 527 |
|
|
if (i != sizeof(eah)) {
|
| 528 |
|
|
perror("eah: write");
|
| 529 |
|
|
exit(1);
|
| 530 |
|
|
}
|
| 531 |
|
|
fprintf(stderr, "wrote %d byte a.out header.\n", i);
|
| 532 |
|
|
|
| 533 |
|
|
if (must_convert_endian)
|
| 534 |
|
|
convert_ecoff_esecs(&esecs[0], nosecs);
|
| 535 |
|
|
i = write(outfile, &esecs, nosecs * sizeof(struct scnhdr));
|
| 536 |
|
|
if (i != nosecs * sizeof(struct scnhdr)) {
|
| 537 |
|
|
perror("esecs: write");
|
| 538 |
|
|
exit(1);
|
| 539 |
|
|
}
|
| 540 |
|
|
fprintf(stderr, "wrote %d bytes of section headers.\n", i);
|
| 541 |
|
|
|
| 542 |
|
|
pad = (sizeof(efh) + sizeof(eah) + nosecs * sizeof(struct scnhdr)) & 15;
|
| 543 |
|
|
if (pad) {
|
| 544 |
|
|
pad = 16 - pad;
|
| 545 |
|
|
i = write(outfile, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0", pad);
|
| 546 |
|
|
if (i < 0) {
|
| 547 |
|
|
perror("ipad: write");
|
| 548 |
|
|
exit(1);
|
| 549 |
|
|
}
|
| 550 |
|
|
fprintf(stderr, "wrote %d byte pad.\n", i);
|
| 551 |
|
|
}
|
| 552 |
|
|
|
| 553 |
|
|
/*
|
| 554 |
|
|
* Copy the loadable sections. Zero-fill any gaps less than 64k;
|
| 555 |
|
|
* complain about any zero-filling, and die if we're asked to zero-fill
|
| 556 |
|
|
* more than 64k.
|
| 557 |
|
|
*/
|
| 558 |
|
|
for (i = 0; i < ex.e_phnum; i++) {
|
| 559 |
|
|
/*
|
| 560 |
|
|
* Unprocessable sections were handled above, so just verify
|
| 561 |
|
|
* that the section can be loaded before copying.
|
| 562 |
|
|
*/
|
| 563 |
|
|
if (ph[i].p_type != PT_LOAD || ph[i].p_filesz == 0)
|
| 564 |
|
|
continue;
|
| 565 |
|
|
|
| 566 |
|
|
if (cur_vma != ph[i].p_vaddr) {
|
| 567 |
|
|
unsigned long gap = ph[i].p_vaddr - cur_vma;
|
| 568 |
|
|
char obuf[1024];
|
| 569 |
|
|
|
| 570 |
|
|
if (gap > 65536) {
|
| 571 |
|
|
fprintf(stderr, "Intersegment gap (%ld "
|
| 572 |
|
|
"bytes) too large.\n", gap);
|
| 573 |
|
|
exit(1);
|
| 574 |
|
|
}
|
| 575 |
|
|
fprintf(stderr, "Warning: %ld byte intersegment gap.\n",
|
| 576 |
|
|
gap);
|
| 577 |
|
|
memset(obuf, 0, sizeof(obuf));
|
| 578 |
|
|
while (gap) {
|
| 579 |
|
|
int count = write(outfile, obuf,
|
| 580 |
|
|
gap > sizeof(obuf) ? sizeof(obuf) : gap);
|
| 581 |
|
|
if (count < 0) {
|
| 582 |
|
|
fprintf(stderr,
|
| 583 |
|
|
"Error writing gap: %s\n",
|
| 584 |
|
|
strerror(errno));
|
| 585 |
|
|
exit(1);
|
| 586 |
|
|
}
|
| 587 |
|
|
gap -= count;
|
| 588 |
|
|
}
|
| 589 |
|
|
}
|
| 590 |
|
|
fprintf(stderr, "writing %d bytes...\n", ph[i].p_filesz);
|
| 591 |
|
|
copy(outfile, infile, ph[i].p_offset, ph[i].p_filesz);
|
| 592 |
|
|
cur_vma = ph[i].p_vaddr + ph[i].p_filesz;
|
| 593 |
|
|
}
|
| 594 |
|
|
|
| 595 |
|
|
/*
|
| 596 |
|
|
* Write a page of padding for boot PROMS that read entire pages.
|
| 597 |
|
|
* Without this, they may attempt to read past the end of the
|
| 598 |
|
|
* data section, incur an error, and refuse to boot.
|
| 599 |
|
|
*/
|
| 600 |
|
|
{
|
| 601 |
|
|
char obuf[4096];
|
| 602 |
|
|
memset(obuf, 0, sizeof(obuf));
|
| 603 |
|
|
if (write(outfile, obuf, sizeof(obuf)) != sizeof(obuf)) {
|
| 604 |
|
|
fprintf(stderr, "Error writing PROM padding: %s\n",
|
| 605 |
|
|
strerror(errno));
|
| 606 |
|
|
exit(1);
|
| 607 |
|
|
}
|
| 608 |
|
|
}
|
| 609 |
|
|
|
| 610 |
|
|
/* Looks like we won... */
|
| 611 |
|
|
exit(0);
|
| 612 |
|
|
}
|
