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/* |
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* Copyright (C) 2003-2007 Anders Gavare. 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 are met: |
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* |
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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 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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* |
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* $Id: file.c,v 1.1 2007/04/10 16:33:44 debug Exp $ |
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* |
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* This module contains functions which load executable images into (emulated) |
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* memory. File formats recognized so far are: |
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* |
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* a.out old format used by OpenBSD 2.x pmax kernels |
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* Mach-O MacOS X format, etc. |
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* ecoff old format used by Ultrix, Windows NT, etc |
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* srec Motorola SREC format |
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* raw raw binaries, "address:[skiplen:[entrypoint:]]filename" |
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* ELF 32-bit and 64-bit ELFs |
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* |
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* If a file is not of one of the above mentioned formats, it is assumed |
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* to be symbol data generated by 'nm' or 'nm -S'. |
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*/ |
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|
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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 <sys/types.h> |
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|
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#include "cpu.h" |
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#include "machine.h" |
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#include "memory.h" |
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#include "misc.h" |
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#include "symbol.h" |
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|
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|
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extern int quiet_mode; |
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extern int verbose; |
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|
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|
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/* |
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* This should be increased by every routine here that actually loads an |
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* executable file into memory. (For example, loading a symbol file should |
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* NOT increase this.) |
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*/ |
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static int n_executables_loaded = 0; |
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|
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|
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#include "exec_elf.h" /* Ugly; needed for ELFDATA2LSB etc. */ |
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|
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#define unencode(var,dataptr,typ) { \ |
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int Wi; unsigned char Wb; \ |
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unsigned char *Wp = (unsigned char *) dataptr; \ |
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int Wlen = sizeof(typ); \ |
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var = 0; \ |
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for (Wi=0; Wi<Wlen; Wi++) { \ |
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if (encoding == ELFDATA2LSB) \ |
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Wb = Wp[Wlen-1 - Wi]; \ |
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else \ |
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Wb = Wp[Wi]; \ |
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if (Wi == 0 && (Wb & 0x80)) { \ |
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var --; /* set var to -1 :-) */ \ |
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var <<= 8; \ |
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} \ |
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var |= Wb; \ |
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if (Wi < Wlen-1) \ |
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var <<= 8; \ |
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} \ |
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} |
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|
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|
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#include "file_aout.c" |
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#include "file_ecoff.c" |
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#include "file_elf.c" |
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#include "file_macho.c" |
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#include "file_raw.c" |
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#include "file_srec.c" |
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|
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|
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/* |
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* file_n_executables_loaded(): |
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* |
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* Returns the number of executable files loaded into emulated memory. |
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*/ |
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int file_n_executables_loaded(void) |
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{ |
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return n_executables_loaded; |
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} |
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|
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|
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/* |
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* file_load(): |
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* |
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* Sense the file format of a file (ELF, a.out, ecoff), and call the |
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* right file_load_XXX() function. If the file isn't of a recognized |
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* binary format, assume that it contains symbol definitions. |
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* |
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* If the filename doesn't exist, try to treat the name as |
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* "address:filename" and load the file as a raw binary. |
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*/ |
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void file_load(struct machine *machine, struct memory *mem, |
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char *filename, uint64_t *entrypointp, |
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int arch, uint64_t *gpp, int *byte_orderp, uint64_t *tocp) |
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{ |
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int iadd = DEBUG_INDENTATION, old_quiet_mode; |
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FILE *f; |
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unsigned char buf[12]; |
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unsigned char buf2[2]; |
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size_t len, len2, i; |
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off_t size; |
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|
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if (byte_orderp == NULL) { |
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fprintf(stderr, "file_load(): byte_order == NULL\n"); |
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exit(1); |
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} |
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|
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if (arch == ARCH_NOARCH) { |
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fprintf(stderr, "file_load(): FATAL ERROR: no arch?\n"); |
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exit(1); |
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} |
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|
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if (mem == NULL || filename == NULL) { |
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fprintf(stderr, "file_load(): mem or filename is NULL\n"); |
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exit(1); |
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} |
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|
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/* Skip configuration files: */ |
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if (filename[0] == '@') |
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return; |
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|
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debug("loading %s%s\n", filename, verbose >= 2? ":" : ""); |
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debug_indentation(iadd); |
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|
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old_quiet_mode = quiet_mode; |
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if (verbose < 2) |
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quiet_mode = 1; |
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|
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f = fopen(filename, "r"); |
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if (f == NULL) { |
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file_load_raw(machine, mem, filename, entrypointp); |
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goto ret; |
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} |
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|
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fseek(f, 0, SEEK_END); |
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size = ftello(f); |
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fseek(f, 0, SEEK_SET); |
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|
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memset(buf, 0, sizeof(buf)); |
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len = fread(buf, 1, sizeof(buf), f); |
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fseek(f, 510, SEEK_SET); |
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len2 = fread(buf2, 1, sizeof(buf2), f); |
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fclose(f); |
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|
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if (len < (signed int)sizeof(buf)) { |
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fprintf(stderr, "\nThis file is too small to contain " |
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"anything useful\n"); |
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exit(1); |
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} |
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|
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/* Is it an ELF? */ |
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if (buf[0] == 0x7f && buf[1]=='E' && buf[2]=='L' && buf[3]=='F') { |
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file_load_elf(machine, mem, filename, |
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entrypointp, arch, gpp, byte_orderp, tocp); |
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goto ret; |
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} |
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|
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/* Is it an a.out? */ |
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if (buf[0]==0x00 && buf[1]==0x8b && buf[2]==0x01 && buf[3]==0x07) { |
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/* MIPS a.out */ |
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file_load_aout(machine, mem, filename, 0, |
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entrypointp, arch, byte_orderp); |
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goto ret; |
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} |
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if (buf[0]==0x00 && buf[1]==0x87 && buf[2]==0x01 && buf[3]==0x08) { |
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/* M68K a.out */ |
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file_load_aout(machine, mem, filename, |
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AOUT_FLAG_VADDR_ZERO_HACK /* for OpenBSD/mac68k */, |
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entrypointp, arch, byte_orderp); |
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goto ret; |
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} |
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if (buf[0]==0x00 && buf[1]==0x8f && buf[2]==0x01 && buf[3]==0x0b) { |
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/* ARM a.out */ |
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file_load_aout(machine, mem, filename, AOUT_FLAG_FROM_BEGINNING, |
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entrypointp, arch, byte_orderp); |
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goto ret; |
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} |
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if (buf[0]==0x00 && buf[1]==0x86 && buf[2]==0x01 && buf[3]==0x0b) { |
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/* i386 a.out (old OpenBSD and NetBSD etc) */ |
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file_load_aout(machine, mem, filename, AOUT_FLAG_FROM_BEGINNING, |
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entrypointp, arch, byte_orderp); |
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goto ret; |
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} |
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if (buf[0]==0x01 && buf[1]==0x03 && buf[2]==0x01 && buf[3]==0x07) { |
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/* SPARC a.out (old 32-bit NetBSD etc) */ |
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file_load_aout(machine, mem, filename, AOUT_FLAG_NO_SIZES, |
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entrypointp, arch, byte_orderp); |
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goto ret; |
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} |
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if (buf[0]==0x00 && buf[2]==0x00 && buf[8]==0x7a && buf[9]==0x75) { |
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/* DEC OSF1 on MIPS: */ |
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file_load_aout(machine, mem, filename, AOUT_FLAG_DECOSF1, |
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entrypointp, arch, byte_orderp); |
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goto ret; |
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} |
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|
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/* |
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* Is it a Mach-O file? |
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*/ |
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if (buf[0] == 0xfe && buf[1] == 0xed && buf[2] == 0xfa && |
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(buf[3] == 0xce || buf[3] == 0xcf)) { |
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file_load_macho(machine, mem, filename, entrypointp, |
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arch, byte_orderp, buf[3] == 0xcf, 0); |
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goto ret; |
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} |
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if ((buf[0] == 0xce || buf[0] == 0xcf) && buf[1] == 0xfa && |
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buf[2] == 0xed && buf[3] == 0xfe) { |
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file_load_macho(machine, mem, filename, entrypointp, |
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arch, byte_orderp, buf[0] == 0xcf, 1); |
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goto ret; |
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} |
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|
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/* |
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* Is it an ecoff? |
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* |
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* TODO: What's the deal with the magic value's byte order? Sometimes |
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* it seems to be reversed for BE when compared to LE, but not always? |
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*/ |
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if (buf[0]+256*buf[1] == ECOFF_MAGIC_MIPSEB || |
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buf[0]+256*buf[1] == ECOFF_MAGIC_MIPSEL || |
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buf[0]+256*buf[1] == ECOFF_MAGIC_MIPSEB2 || |
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buf[0]+256*buf[1] == ECOFF_MAGIC_MIPSEL2 || |
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buf[0]+256*buf[1] == ECOFF_MAGIC_MIPSEB3 || |
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buf[0]+256*buf[1] == ECOFF_MAGIC_MIPSEL3 || |
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buf[1]+256*buf[0] == ECOFF_MAGIC_MIPSEB || |
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buf[1]+256*buf[0] == ECOFF_MAGIC_MIPSEL || |
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buf[1]+256*buf[0] == ECOFF_MAGIC_MIPSEB2 || |
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buf[1]+256*buf[0] == ECOFF_MAGIC_MIPSEL2 || |
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buf[1]+256*buf[0] == ECOFF_MAGIC_MIPSEB3 || |
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buf[1]+256*buf[0] == ECOFF_MAGIC_MIPSEL3) { |
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file_load_ecoff(machine, mem, filename, entrypointp, |
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arch, gpp, byte_orderp); |
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goto ret; |
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} |
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|
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/* Is it a Motorola SREC file? */ |
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if ((buf[0]=='S' && buf[1]>='0' && buf[1]<='9')) { |
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file_load_srec(machine, mem, filename, entrypointp); |
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goto ret; |
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} |
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|
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/* gzipped files are not supported: */ |
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if (buf[0]==0x1f && buf[1]==0x8b) { |
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fprintf(stderr, "\nYou need to gunzip the file before you" |
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" try to use it.\n"); |
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exit(1); |
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} |
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|
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if (size > 24000000) { |
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fprintf(stderr, "\nThis file is very large (%lli bytes)\n", |
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(long long)size); |
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fprintf(stderr, "Are you sure it is a kernel and not a disk " |
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"image? (Use the -d option.)\n"); |
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exit(1); |
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} |
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|
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if (size == 1474560) |
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fprintf(stderr, "Hm... this file is the size of a 1.44 MB " |
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"floppy image. Maybe you forgot the\n-d switch?\n"); |
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|
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/* |
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* Ugly hack for Dreamcast: When booting from a Dreamcast CDROM |
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* image, a temporary file is extracted into /tmp/gxemul.*, but this |
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* is a "scrambled" raw binary. This code unscrambles it, and loads |
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* it as a raw binary. |
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*/ |
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if (machine->machine_type == MACHINE_DREAMCAST && |
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strncmp(filename, "/tmp/gxemul.", 12) == 0) { |
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char *tmp_filename = malloc(strlen(filename) + 100); |
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snprintf(tmp_filename, strlen(filename) + 100, |
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"%s.descrambled", filename); |
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debug("descrambling into %s\n", tmp_filename); |
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dreamcast_descramble(filename, tmp_filename); |
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|
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snprintf(tmp_filename, strlen(filename) + 100, |
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"0x8c010000:%s.descrambled", filename); |
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debug("loading descrambled Dreamcast binary\n"); |
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file_load_raw(machine, mem, tmp_filename, entrypointp); |
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free(tmp_filename); |
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|
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/* Hack: Start a "boot from CDROM" sequence: */ |
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*entrypointp = 0x8c000080; |
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goto ret; |
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} |
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|
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/* |
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* Last resort: symbol definitions from nm (or nm -S): |
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* |
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* If the buf contains typical 'binary' characters, then print |
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* an error message and quit instead of assuming that it is a |
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* symbol file. |
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*/ |
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for (i=0; i<(signed)sizeof(buf); i++) |
| 322 |
if (buf[i] < 32 && buf[i] != '\t' && |
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buf[i] != '\n' && buf[i] != '\r' && |
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buf[i] != '\f') { |
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fprintf(stderr, "\nThe file format of '%s' is " |
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"unknown.\n\n ", filename); |
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for (i=0; i<(signed)sizeof(buf); i++) |
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fprintf(stderr, " %02x", buf[i]); |
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|
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if (len2 == 2 && buf2[0] == 0x55 && buf2[1] == 0xaa) |
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fprintf(stderr, "\n\nIt has a PC-style " |
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"bootsector marker."); |
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|
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fprintf(stderr, "\n\nPossible explanations:\n\n" |
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" o) If this is a disk image, you forgot '-d' " |
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"on the command line.\n" |
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" o) This is an unsupported binary format.\n\n"); |
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exit(1); |
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} |
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|
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symbol_readfile(&machine->symbol_context, filename); |
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|
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ret: |
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debug_indentation(-iadd); |
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quiet_mode = old_quiet_mode; |
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} |
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