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/* |
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* Copyright (C) 2003-2005 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 1.88 2005/04/17 00:15:24 debug Exp $ |
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* |
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* This file contains functions which load executable images into (emulated) |
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* memory. File formats recognized so far: |
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* |
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* ELF 32-bit and 64-bit ELFs |
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* a.out old format used by OpenBSD 2.x pmax kernels |
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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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* |
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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> |
| 44 |
#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 "exec_aout.h" |
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#include "exec_ecoff.h" |
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#include "exec_elf.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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/* ELF machine types as strings: (same as exec_elf.h) */ |
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#define N_ELF_MACHINE_TYPES 64 |
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static char *elf_machine_type[N_ELF_MACHINE_TYPES] = { |
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"NONE", "M32", "SPARC", "386", /* 0..3 */ |
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"68K", "88K", "486", "860", /* 4..7 */ |
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"MIPS", "S370", "MIPS_RS3_LE", "RS6000", /* 8..11 */ |
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"unknown12", "unknown13", "unknown14", "PARISC", /* 12..15 */ |
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"NCUBE", "VPP500", "SPARC32PLUS", "960", /* 16..19 */ |
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"PPC", "PPC64", "unknown22", "unknown23", /* 20..23 */ |
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"unknown24", "unknown25", "unknown26", "unknown27", /* 24..27 */ |
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"unknown28", "unknown29", "unknown30", "unknown31", /* 28..31 */ |
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"unknown32", "unknown33", "unknown34", "unknown35", /* 32..35 */ |
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"V800", "FR20", "RH32", "RCE", /* 36..39 */ |
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"ARM", "ALPHA", "SH", "SPARCV9", /* 40..43 */ |
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"TRICORE", "ARC", "H8_300", "H8_300H", /* 44..47 */ |
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"H8S", "H8_500", "IA_64", "MIPS_X", /* 48..51 */ |
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"COLDFIRE", "68HC12", "unknown54", "unknown55", /* 52..55 */ |
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"unknown56", "unknown57", "unknown58", "unknown59", /* 56..59 */ |
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"unknown60", "unknown61", "AMD64", "unknown63" /* 60..63 */ |
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}; |
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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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struct aout_symbol { |
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uint32_t strindex; |
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uint32_t type; |
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uint32_t addr; |
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}; |
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|
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/* Special symbol format used by Microsoft-ish COFF files: */ |
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struct ms_sym { |
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unsigned char name[8]; |
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unsigned char value[4]; |
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unsigned char section[2]; |
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unsigned char type[2]; |
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unsigned char storage_class; |
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unsigned char n_aux_syms; |
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}; |
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|
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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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/* |
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* file_load_aout(): |
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* |
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* Loads an a.out binary image into the emulated memory. The entry point |
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* (read from the a.out header) is stored in the specified CPU's registers. |
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* |
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* TODO: This has to be rewritten / corrected to support multiple a.out |
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* formats, where text/data are aligned differently. |
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*/ |
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static void file_load_aout(struct machine *m, struct memory *mem, |
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char *filename, int osf1_hack, |
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uint64_t *entrypointp, int arch, int *byte_orderp) |
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{ |
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struct exec aout_header; |
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FILE *f; |
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int len; |
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int encoding = ELFDATA2LSB; |
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uint32_t entry, datasize, textsize; |
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int32_t symbsize = 0; |
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uint32_t vaddr, total_len; |
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unsigned char buf[4096]; |
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unsigned char *syms; |
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|
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f = fopen(filename, "r"); |
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if (f == NULL) { |
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perror(filename); |
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exit(1); |
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} |
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|
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if (osf1_hack) { |
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fread(&buf, 1, 32, f); |
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vaddr = buf[16] + (buf[17] << 8) + |
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(buf[18] << 16) + (buf[19] << 24); |
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entry = buf[20] + (buf[21] << 8) + |
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(buf[22] << 16) + (buf[23] << 24); |
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debug("OSF1 a.out, load address 0x%08lx, " |
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"entry point 0x%08x\n", (long)vaddr, (long)entry); |
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symbsize = 0; |
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fseek(f, 0, SEEK_END); |
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/* This is of course wrong, but should work anyway: */ |
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textsize = ftell(f) - 512; |
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datasize = 0; |
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fseek(f, 512, SEEK_SET); |
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} else { |
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len = fread(&aout_header, 1, sizeof(aout_header), f); |
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if (len != sizeof(aout_header)) { |
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fprintf(stderr, "%s: not a complete a.out image\n", |
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filename); |
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exit(1); |
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} |
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|
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unencode(entry, &aout_header.a_entry, uint32_t); |
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vaddr = entry; |
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debug("a.out, entry point 0x%08lx\n", (long)entry); |
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|
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unencode(textsize, &aout_header.a_text, uint32_t); |
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unencode(datasize, &aout_header.a_data, uint32_t); |
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debug("text + data = %i + %i bytes\n", textsize, datasize); |
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|
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unencode(symbsize, &aout_header.a_syms, uint32_t); |
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} |
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|
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/* Load text and data: */ |
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total_len = textsize + datasize; |
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while (total_len != 0) { |
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len = total_len > sizeof(buf) ? sizeof(buf) : total_len; |
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len = fread(buf, 1, len, f); |
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|
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/* printf("fread len=%i vaddr=%x buf[0..]=%02x %02x %02x\n", |
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len, (int)vaddr, buf[0], buf[1], buf[2]); */ |
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|
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if (len > 0) |
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m->cpus[0]->memory_rw(m->cpus[0], mem, vaddr, |
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&buf[0], len, MEM_WRITE, NO_EXCEPTIONS); |
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else { |
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if (osf1_hack) |
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break; |
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else { |
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fprintf(stderr, "could not read from %s\n", |
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filename); |
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exit(1); |
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} |
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} |
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|
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vaddr += len; |
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total_len -= len; |
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} |
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|
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if (symbsize != 0) { |
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struct aout_symbol *aout_symbol_ptr; |
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int i, n_symbols; |
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uint32_t type, addr, str_index; |
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uint32_t strings_len; |
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char *string_symbols; |
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off_t oldpos; |
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|
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debug("symbols: %i bytes @ 0x%x\n", symbsize, (int)ftell(f)); |
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syms = malloc(symbsize); |
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if (syms == NULL) { |
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fprintf(stderr, "out of memory\n"); |
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exit(1); |
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} |
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len = fread(syms, 1, symbsize, f); |
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if (len != symbsize) { |
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fprintf(stderr, "error reading symbols from %s\n", |
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filename); |
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exit(1); |
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} |
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|
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oldpos = ftell(f); |
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fseek(f, 0, SEEK_END); |
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strings_len = ftell(f) - oldpos; |
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fseek(f, oldpos, SEEK_SET); |
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debug("strings: %i bytes @ 0x%x\n", strings_len, (int)ftell(f)); |
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string_symbols = malloc(strings_len); |
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if (string_symbols == NULL) { |
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fprintf(stderr, "out of memory\n"); |
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exit(1); |
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} |
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fread(string_symbols, 1, strings_len, f); |
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|
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aout_symbol_ptr = (struct aout_symbol *) syms; |
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n_symbols = symbsize / sizeof(struct aout_symbol); |
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i = 0; |
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while (i < n_symbols) { |
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unencode(str_index, &aout_symbol_ptr[i].strindex, |
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uint32_t); |
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unencode(type, &aout_symbol_ptr[i].type, uint32_t); |
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unencode(addr, &aout_symbol_ptr[i].addr, uint32_t); |
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|
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/* debug("symbol type 0x%04x @ 0x%08x: %s\n", |
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type, addr, string_symbols + str_index); */ |
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|
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if (type != 0 && addr != 0) |
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add_symbol_name(&m->symbol_context, |
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addr, 0, string_symbols + str_index, 0); |
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i++; |
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} |
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|
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free(string_symbols); |
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free(syms); |
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} |
| 268 |
|
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fclose(f); |
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|
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*entrypointp = entry; |
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|
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if (encoding == ELFDATA2LSB) |
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*byte_orderp = EMUL_LITTLE_ENDIAN; |
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else |
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*byte_orderp = EMUL_BIG_ENDIAN; |
| 277 |
|
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n_executables_loaded ++; |
| 279 |
} |
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|
| 281 |
|
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/* |
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* file_load_ecoff(): |
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* |
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* Loads an ecoff binary image into the emulated memory. The entry point |
| 286 |
* (read from the ecoff header) is stored in the specified CPU's registers. |
| 287 |
*/ |
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static void file_load_ecoff(struct machine *m, struct memory *mem, |
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char *filename, uint64_t *entrypointp, |
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int arch, uint64_t *gpp, int *byte_orderp) |
| 291 |
{ |
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struct ecoff_exechdr exechdr; |
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int f_magic, f_nscns, f_nsyms; |
| 294 |
int a_magic; |
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off_t f_symptr, a_tsize, a_dsize, a_bsize; |
| 296 |
uint64_t a_entry, a_tstart, a_dstart, a_bstart, a_gp, end_addr=0; |
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char *format_name; |
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struct ecoff_scnhdr scnhdr; |
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FILE *f; |
| 300 |
int len, secn, total_len, chunk_size; |
| 301 |
int encoding = ELFDATA2LSB; /* Assume little-endian. See below */ |
| 302 |
int program_byte_order = -1; |
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unsigned char buf[8192]; |
| 304 |
|
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f = fopen(filename, "r"); |
| 306 |
if (f == NULL) { |
| 307 |
perror(filename); |
| 308 |
exit(1); |
| 309 |
} |
| 310 |
|
| 311 |
len = fread(&exechdr, 1, sizeof(exechdr), f); |
| 312 |
if (len != sizeof(exechdr)) { |
| 313 |
fprintf(stderr, " not a complete ecoff image\n"); |
| 314 |
exit(1); |
| 315 |
} |
| 316 |
|
| 317 |
/* |
| 318 |
* The following code looks a bit ugly, but it should work. The ECOFF |
| 319 |
* 16-bit magic value seems to be stored in MSB byte order for |
| 320 |
* big-endian binaries, and LSB byte order for little-endian binaries. |
| 321 |
* |
| 322 |
* The unencode() assumes little-endianness by default. |
| 323 |
*/ |
| 324 |
unencode(f_magic, &exechdr.f.f_magic, uint16_t); |
| 325 |
switch (f_magic) { |
| 326 |
case ((ECOFF_MAGIC_MIPSEB & 0xff) << 8) + |
| 327 |
((ECOFF_MAGIC_MIPSEB >> 8) & 0xff): |
| 328 |
format_name = "MIPS1 BE"; |
| 329 |
encoding = ELFDATA2MSB; |
| 330 |
break; |
| 331 |
case ECOFF_MAGIC_MIPSEB: |
| 332 |
/* NOTE: Big-endian header, little-endian code! */ |
| 333 |
format_name = "MIPS1 BE-LE"; |
| 334 |
encoding = ELFDATA2MSB; |
| 335 |
program_byte_order = ELFDATA2LSB; |
| 336 |
break; |
| 337 |
case ECOFF_MAGIC_MIPSEL: |
| 338 |
format_name = "MIPS1 LE"; |
| 339 |
encoding = ELFDATA2LSB; |
| 340 |
break; |
| 341 |
case ((ECOFF_MAGIC_MIPSEB2 & 0xff) << 8) + |
| 342 |
((ECOFF_MAGIC_MIPSEB2 >> 8) & 0xff): |
| 343 |
format_name = "MIPS2 BE"; |
| 344 |
encoding = ELFDATA2MSB; |
| 345 |
break; |
| 346 |
case ECOFF_MAGIC_MIPSEL2: |
| 347 |
format_name = "MIPS2 LE"; |
| 348 |
encoding = ELFDATA2LSB; |
| 349 |
break; |
| 350 |
case ((ECOFF_MAGIC_MIPSEB3 & 0xff) << 8) + |
| 351 |
((ECOFF_MAGIC_MIPSEB3 >> 8) & 0xff): |
| 352 |
format_name = "MIPS3 BE"; |
| 353 |
encoding = ELFDATA2MSB; |
| 354 |
break; |
| 355 |
case ECOFF_MAGIC_MIPSEL3: |
| 356 |
format_name = "MIPS3 LE"; |
| 357 |
encoding = ELFDATA2LSB; |
| 358 |
break; |
| 359 |
default: |
| 360 |
fprintf(stderr, "%s: unimplemented ECOFF format, magic = " |
| 361 |
"0x%04x\n", filename, (int)f_magic); |
| 362 |
exit(1); |
| 363 |
} |
| 364 |
|
| 365 |
/* Read various header information: */ |
| 366 |
unencode(f_nscns, &exechdr.f.f_nscns, uint16_t); |
| 367 |
unencode(f_symptr, &exechdr.f.f_symptr, uint32_t); |
| 368 |
unencode(f_nsyms, &exechdr.f.f_nsyms, uint32_t); |
| 369 |
debug("ECOFF, %s, %i sections, %i symbols @ 0x%lx\n", |
| 370 |
format_name, f_nscns, f_nsyms, (long)f_symptr); |
| 371 |
|
| 372 |
unencode(a_magic, &exechdr.a.magic, uint16_t); |
| 373 |
unencode(a_tsize, &exechdr.a.tsize, uint32_t); |
| 374 |
unencode(a_dsize, &exechdr.a.dsize, uint32_t); |
| 375 |
unencode(a_bsize, &exechdr.a.bsize, uint32_t); |
| 376 |
debug("magic 0x%04x, tsize 0x%x, dsize 0x%x, bsize 0x%x\n", |
| 377 |
a_magic, (int)a_tsize, (int)a_dsize, (int)a_bsize); |
| 378 |
|
| 379 |
unencode(a_tstart, &exechdr.a.text_start, uint32_t); |
| 380 |
unencode(a_dstart, &exechdr.a.data_start, uint32_t); |
| 381 |
unencode(a_bstart, &exechdr.a.bss_start, uint32_t); |
| 382 |
debug("text @ 0x%08x, data @ 0x%08x, bss @ 0x%08x\n", |
| 383 |
(int)a_tstart, (int)a_dstart, (int)a_bstart); |
| 384 |
|
| 385 |
unencode(a_entry, &exechdr.a.entry, uint32_t); |
| 386 |
unencode(a_gp, &exechdr.a.gp_value, uint32_t); |
| 387 |
debug("entrypoint 0x%08x, gp = 0x%08x\n", |
| 388 |
(int)a_entry, (int)a_gp); |
| 389 |
|
| 390 |
/* |
| 391 |
* Special hack for a MACH/pmax kernel, I don't know how applicable |
| 392 |
* this is for other files: |
| 393 |
* there are no sections (!), and a_magic = 0x0108 instead of |
| 394 |
* 0x0107 as it is on most other (E)COFF files I've seen. |
| 395 |
* |
| 396 |
* Then load everything after the header to the text start address. |
| 397 |
*/ |
| 398 |
if (f_nscns == 0 && a_magic == 0x108) { |
| 399 |
uint64_t where = a_tstart; |
| 400 |
total_len = 0; |
| 401 |
fseek(f, 0x50, SEEK_SET); |
| 402 |
while (!feof(f)) { |
| 403 |
chunk_size = 256; |
| 404 |
len = fread(buf, 1, chunk_size, f); |
| 405 |
|
| 406 |
if (len > 0) |
| 407 |
m->cpus[0]->memory_rw(m->cpus[0], mem, where, |
| 408 |
&buf[0], len, MEM_WRITE, NO_EXCEPTIONS); |
| 409 |
where += len; |
| 410 |
total_len += len; |
| 411 |
} |
| 412 |
debug("MACH/pmax hack (!), read 0x%x bytes\n", total_len); |
| 413 |
} |
| 414 |
|
| 415 |
/* Go through all the section headers: */ |
| 416 |
for (secn=0; secn<f_nscns; secn++) { |
| 417 |
off_t s_scnptr, s_relptr, s_lnnoptr, oldpos; |
| 418 |
int s_nreloc, s_nlnno, s_flags; |
| 419 |
int s_size; |
| 420 |
unsigned int i; |
| 421 |
uint64_t s_paddr, s_vaddr; |
| 422 |
|
| 423 |
/* Read a section header: */ |
| 424 |
len = fread(&scnhdr, 1, sizeof(scnhdr), f); |
| 425 |
if (len != sizeof(scnhdr)) { |
| 426 |
fprintf(stderr, "%s: incomplete section " |
| 427 |
"header %i\n", filename, secn); |
| 428 |
exit(1); |
| 429 |
} |
| 430 |
|
| 431 |
/* Show the section name: */ |
| 432 |
debug("section "); |
| 433 |
for (i=0; i<sizeof(scnhdr.s_name); i++) |
| 434 |
if (scnhdr.s_name[i] >= 32 && scnhdr.s_name[i] < 127) |
| 435 |
debug("%c", scnhdr.s_name[i]); |
| 436 |
else |
| 437 |
break; |
| 438 |
debug(" ("); |
| 439 |
|
| 440 |
unencode(s_paddr, &scnhdr.s_paddr, uint32_t); |
| 441 |
unencode(s_vaddr, &scnhdr.s_vaddr, uint32_t); |
| 442 |
unencode(s_size, &scnhdr.s_size, uint32_t); |
| 443 |
unencode(s_scnptr, &scnhdr.s_scnptr, uint32_t); |
| 444 |
unencode(s_relptr, &scnhdr.s_relptr, uint32_t); |
| 445 |
unencode(s_lnnoptr, &scnhdr.s_lnnoptr, uint32_t); |
| 446 |
unencode(s_nreloc, &scnhdr.s_nreloc, uint16_t); |
| 447 |
unencode(s_nlnno, &scnhdr.s_nlnno, uint16_t); |
| 448 |
unencode(s_flags, &scnhdr.s_flags, uint32_t); |
| 449 |
|
| 450 |
debug("0x%x @ 0x%08x, offset 0x%lx, flags 0x%x)\n", |
| 451 |
(int)s_size, (int)s_vaddr, (long)s_scnptr, (int)s_flags); |
| 452 |
|
| 453 |
end_addr = s_vaddr + s_size; |
| 454 |
|
| 455 |
if (s_relptr != 0) { |
| 456 |
/* |
| 457 |
* TODO: Read this url, or similar: |
| 458 |
* http://www.iecc.com/linker/linker07.html |
| 459 |
*/ |
| 460 |
fprintf(stderr, "%s: relocatable code/data in " |
| 461 |
"section nr %i: not yet implemented\n", |
| 462 |
filename, secn); |
| 463 |
exit(1); |
| 464 |
} |
| 465 |
|
| 466 |
/* Loadable? Then load the section: */ |
| 467 |
if (s_scnptr != 0 && s_size != 0 && |
| 468 |
s_vaddr != 0 && !(s_flags & 0x02)) { |
| 469 |
/* Remember the current file offset: */ |
| 470 |
oldpos = ftell(f); |
| 471 |
|
| 472 |
/* Load the section into emulated memory: */ |
| 473 |
fseek(f, s_scnptr, SEEK_SET); |
| 474 |
total_len = 0; |
| 475 |
chunk_size = 1; |
| 476 |
if ((s_vaddr & 0xf) == 0) chunk_size = 0x10; |
| 477 |
if ((s_vaddr & 0xff) == 0) chunk_size = 0x100; |
| 478 |
if ((s_vaddr & 0xfff) == 0) chunk_size = 0x1000; |
| 479 |
while (total_len < s_size) { |
| 480 |
len = chunk_size; |
| 481 |
if (total_len + len > s_size) |
| 482 |
len = s_size - total_len; |
| 483 |
len = fread(buf, 1, chunk_size, f); |
| 484 |
if (len == 0) { |
| 485 |
debug("!!! total_len = %i, " |
| 486 |
"chunk_size = %i, len = %i\n", |
| 487 |
total_len, chunk_size, len); |
| 488 |
break; |
| 489 |
} |
| 490 |
|
| 491 |
m->cpus[0]->memory_rw(m->cpus[0], mem, s_vaddr, |
| 492 |
&buf[0], len, MEM_WRITE, NO_EXCEPTIONS); |
| 493 |
s_vaddr += len; |
| 494 |
total_len += len; |
| 495 |
} |
| 496 |
|
| 497 |
/* Return to position inside the section headers: */ |
| 498 |
fseek(f, oldpos, SEEK_SET); |
| 499 |
} |
| 500 |
} |
| 501 |
|
| 502 |
if (f_symptr != 0 && f_nsyms != 0) { |
| 503 |
struct ecoff_symhdr symhdr; |
| 504 |
int sym_magic, iextMax, issExtMax, issMax, crfd; |
| 505 |
off_t cbRfdOffset, cbExtOffset, cbSsExtOffset, cbSsOffset; |
| 506 |
char *symbol_data; |
| 507 |
struct ecoff_extsym *extsyms; |
| 508 |
int nsymbols, sym_nr; |
| 509 |
|
| 510 |
fseek(f, f_symptr, SEEK_SET); |
| 511 |
|
| 512 |
len = fread(&symhdr, 1, sizeof(symhdr), f); |
| 513 |
if (len != sizeof(symhdr)) { |
| 514 |
fprintf(stderr, "%s: not a complete " |
| 515 |
"ecoff image: symhdr broken\n", filename); |
| 516 |
exit(1); |
| 517 |
} |
| 518 |
|
| 519 |
unencode(sym_magic, &symhdr.magic, uint16_t); |
| 520 |
unencode(crfd, &symhdr.crfd, uint32_t); |
| 521 |
unencode(cbRfdOffset, &symhdr.cbRfdOffset, uint32_t); |
| 522 |
unencode(issMax, &symhdr.issMax, uint32_t); |
| 523 |
unencode(cbSsOffset, &symhdr.cbSsOffset, uint32_t); |
| 524 |
unencode(issExtMax, &symhdr.issExtMax, uint32_t); |
| 525 |
unencode(cbSsExtOffset, &symhdr.cbSsExtOffset, uint32_t); |
| 526 |
unencode(iextMax, &symhdr.iextMax, uint32_t); |
| 527 |
unencode(cbExtOffset, &symhdr.cbExtOffset, uint32_t); |
| 528 |
|
| 529 |
if (sym_magic != MIPS_MAGIC_SYM) { |
| 530 |
unsigned char *ms_sym_buf; |
| 531 |
struct ms_sym *sym; |
| 532 |
int n_real_symbols = 0; |
| 533 |
|
| 534 |
debug("bad symbol magic, assuming Microsoft format: "); |
| 535 |
|
| 536 |
/* |
| 537 |
* See http://www.lisoleg.net/lisoleg/elfandlib/ |
| 538 |
* Microsoft%20Portable%20Executable%20COFF%20For |
| 539 |
* mat%20Specification.txt |
| 540 |
* for more details. |
| 541 |
*/ |
| 542 |
ms_sym_buf = malloc(sizeof(struct ms_sym) * f_nsyms); |
| 543 |
if (ms_sym_buf == NULL) { |
| 544 |
fprintf(stderr, "out of memory\n"); |
| 545 |
exit(1); |
| 546 |
} |
| 547 |
fseek(f, f_symptr, SEEK_SET); |
| 548 |
len = fread(ms_sym_buf, 1, |
| 549 |
sizeof(struct ms_sym) * f_nsyms, f); |
| 550 |
sym = (struct ms_sym *) ms_sym_buf; |
| 551 |
for (sym_nr=0; sym_nr<f_nsyms; sym_nr++) { |
| 552 |
char name[300]; |
| 553 |
uint32_t v, t, altname; |
| 554 |
/* debug("sym %5i: '", sym_nr); |
| 555 |
for (i=0; i<8 && sym->name[i]; i++) |
| 556 |
debug("%c", sym->name[i]); */ |
| 557 |
v = sym->value[0] + (sym->value[1] << 8) |
| 558 |
+ (sym->value[2] << 16) |
| 559 |
+ (sym->value[3] << 24); |
| 560 |
altname = sym->name[4] + (sym->name[5] << 8) |
| 561 |
+ (sym->name[6] << 16) |
| 562 |
+ (sym->name[3] << 24); |
| 563 |
t = (sym->type[1] << 8) + sym->type[0]; |
| 564 |
/* TODO: big endian COFF? */ |
| 565 |
/* debug("' value=0x%x type=0x%04x", v, t); */ |
| 566 |
|
| 567 |
if (t == 0x20 && sym->name[0]) { |
| 568 |
memcpy(name, sym->name, 8); |
| 569 |
name[8] = '\0'; |
| 570 |
add_symbol_name(&m->symbol_context, |
| 571 |
v, 0, name, 0); |
| 572 |
n_real_symbols ++; |
| 573 |
} else if (t == 0x20 && !sym->name[0]) { |
| 574 |
off_t ofs; |
| 575 |
ofs = f_symptr + altname + |
| 576 |
sizeof(struct ms_sym) * f_nsyms; |
| 577 |
fseek(f, ofs, SEEK_SET); |
| 578 |
fread(name, 1, sizeof(name), f); |
| 579 |
name[sizeof(name)-1] = '\0'; |
| 580 |
/* debug(" [altname=0x%x '%s']", |
| 581 |
altname, name); */ |
| 582 |
add_symbol_name(&m->symbol_context, |
| 583 |
v, 0, name, 0); |
| 584 |
n_real_symbols ++; |
| 585 |
} |
| 586 |
|
| 587 |
|
| 588 |
if (sym->n_aux_syms) { |
| 589 |
int n = sym->n_aux_syms; |
| 590 |
/* debug(" aux='"); */ |
| 591 |
while (n-- > 0) { |
| 592 |
sym ++; sym_nr ++; |
| 593 |
/* for (i=0; i<8 && |
| 594 |
sym->name[i]; i++) |
| 595 |
debug("%c", |
| 596 |
sym->name[i]); */ |
| 597 |
} |
| 598 |
/* debug("'"); */ |
| 599 |
} |
| 600 |
/* debug("\n"); */ |
| 601 |
sym ++; |
| 602 |
} |
| 603 |
|
| 604 |
debug("%i symbols\n", n_real_symbols); |
| 605 |
free(ms_sym_buf); |
| 606 |
|
| 607 |
goto skip_normal_coff_symbols; |
| 608 |
} |
| 609 |
|
| 610 |
debug("symbol header: magic = 0x%x\n", sym_magic); |
| 611 |
|
| 612 |
debug("%i symbols @ 0x%08x (strings @ 0x%08x)\n", |
| 613 |
iextMax, cbExtOffset, cbSsExtOffset); |
| 614 |
|
| 615 |
symbol_data = malloc(issExtMax + 2); |
| 616 |
if (symbol_data == NULL) { |
| 617 |
fprintf(stderr, "out of memory\n"); |
| 618 |
exit(1); |
| 619 |
} |
| 620 |
memset(symbol_data, 0, issExtMax + 2); |
| 621 |
fseek(f, cbSsExtOffset, SEEK_SET); |
| 622 |
fread(symbol_data, 1, issExtMax + 1, f); |
| 623 |
|
| 624 |
nsymbols = iextMax; |
| 625 |
|
| 626 |
extsyms = malloc(iextMax * sizeof(struct ecoff_extsym)); |
| 627 |
if (extsyms == NULL) { |
| 628 |
fprintf(stderr, "out of memory\n"); |
| 629 |
exit(1); |
| 630 |
} |
| 631 |
memset(extsyms, 0, iextMax * sizeof(struct ecoff_extsym)); |
| 632 |
fseek(f, cbExtOffset, SEEK_SET); |
| 633 |
fread(extsyms, 1, iextMax * sizeof(struct ecoff_extsym), f); |
| 634 |
|
| 635 |
/* Unencode the strindex and value first: */ |
| 636 |
for (sym_nr=0; sym_nr<nsymbols; sym_nr++) { |
| 637 |
uint64_t value, strindex; |
| 638 |
|
| 639 |
unencode(strindex, &extsyms[sym_nr].es_strindex, |
| 640 |
uint32_t); |
| 641 |
unencode(value, &extsyms[sym_nr].es_value, uint32_t); |
| 642 |
|
| 643 |
extsyms[sym_nr].es_strindex = strindex; |
| 644 |
extsyms[sym_nr].es_value = value; |
| 645 |
} |
| 646 |
|
| 647 |
for (sym_nr=0; sym_nr<nsymbols; sym_nr++) { |
| 648 |
/* debug("symbol%6i: 0x%08x = %s\n", |
| 649 |
sym_nr, (int)extsyms[sym_nr].es_value, |
| 650 |
symbol_data + extsyms[sym_nr].es_strindex); */ |
| 651 |
|
| 652 |
add_symbol_name(&m->symbol_context, |
| 653 |
extsyms[sym_nr].es_value, 0, |
| 654 |
symbol_data + extsyms[sym_nr].es_strindex, 0); |
| 655 |
} |
| 656 |
|
| 657 |
free(extsyms); |
| 658 |
free(symbol_data); |
| 659 |
|
| 660 |
skip_normal_coff_symbols: |
| 661 |
; |
| 662 |
} |
| 663 |
|
| 664 |
fclose(f); |
| 665 |
|
| 666 |
*entrypointp = a_entry; |
| 667 |
*gpp = a_gp; |
| 668 |
m->file_loaded_end_addr = end_addr; |
| 669 |
|
| 670 |
if (program_byte_order != -1) |
| 671 |
encoding = program_byte_order; |
| 672 |
|
| 673 |
if (encoding == ELFDATA2LSB) |
| 674 |
*byte_orderp = EMUL_LITTLE_ENDIAN; |
| 675 |
else |
| 676 |
*byte_orderp = EMUL_BIG_ENDIAN; |
| 677 |
|
| 678 |
n_executables_loaded ++; |
| 679 |
} |
| 680 |
|
| 681 |
|
| 682 |
/* |
| 683 |
* file_load_srec(): |
| 684 |
* |
| 685 |
* Loads a Motorola SREC file into emulated memory. Description of the SREC |
| 686 |
* file format can be found at here: |
| 687 |
* |
| 688 |
* http://www.ndsu.nodak.edu/instruct/tareski/373f98/notes/srecord.htm |
| 689 |
* or http://www.amelek.gda.pl/avr/uisp/srecord.htm |
| 690 |
*/ |
| 691 |
static void file_load_srec(struct machine *m, struct memory *mem, |
| 692 |
char *filename, uint64_t *entrypointp) |
| 693 |
{ |
| 694 |
FILE *f; |
| 695 |
unsigned char buf[516]; |
| 696 |
unsigned char bytes[270]; |
| 697 |
uint64_t entry = 0, vaddr = 0; |
| 698 |
int i, j, count; |
| 699 |
char ch; |
| 700 |
int buf_len, data_start = 0; |
| 701 |
int entry_set = 0; |
| 702 |
int warning = 0; |
| 703 |
int warning_len = 0; |
| 704 |
int total_bytes_loaded = 0; |
| 705 |
|
| 706 |
f = fopen(filename, "r"); |
| 707 |
if (f == NULL) { |
| 708 |
perror(filename); |
| 709 |
exit(1); |
| 710 |
} |
| 711 |
|
| 712 |
/* Load file contents: */ |
| 713 |
while (!feof(f)) { |
| 714 |
memset(buf, 0, sizeof(buf)); |
| 715 |
fgets((char *)buf, sizeof(buf)-1, f); |
| 716 |
|
| 717 |
if (buf[0] == 0 || buf[0]=='\r' || buf[0]=='\n') |
| 718 |
continue; |
| 719 |
|
| 720 |
if (buf[0] != 'S') { |
| 721 |
if (!warning) |
| 722 |
debug("WARNING! non-S-record found\n"); |
| 723 |
warning = 1; |
| 724 |
continue; |
| 725 |
} |
| 726 |
|
| 727 |
buf_len = strlen((char *)buf); |
| 728 |
|
| 729 |
if (buf_len < 10) { |
| 730 |
if (!warning_len) |
| 731 |
debug("WARNING! invalid S-record found\n"); |
| 732 |
warning_len = 1; |
| 733 |
continue; |
| 734 |
} |
| 735 |
|
| 736 |
/* |
| 737 |
* Stype count address data checksum |
| 738 |
* 01 23 4.. .. (last 2 bytes) |
| 739 |
* |
| 740 |
* TODO: actually check the checksum |
| 741 |
*/ |
| 742 |
|
| 743 |
j = 0; |
| 744 |
for (i=1; i<buf_len; i++) { |
| 745 |
if (buf[i]>='a' && buf[i]<='f') |
| 746 |
buf[i] += 10 - 'a'; |
| 747 |
else if (buf[i] >= 'A' && buf[i] <= 'F') |
| 748 |
buf[i] += 10 - 'A'; |
| 749 |
else if (buf[i] >= '0' && buf[i] <= '9') |
| 750 |
buf[i] -= '0'; |
| 751 |
else if (buf[i] == '\r' || buf[i] == '\n') { |
| 752 |
} else |
| 753 |
fatal("invalid characters '%c' in S-record\n", |
| 754 |
buf[i]); |
| 755 |
|
| 756 |
if (i >= 4) { |
| 757 |
if (i & 1) |
| 758 |
bytes[j++] += buf[i]; |
| 759 |
else |
| 760 |
bytes[j] = buf[i] * 16; |
| 761 |
} |
| 762 |
} |
| 763 |
|
| 764 |
count = buf[2] * 16 + buf[3]; |
| 765 |
/* debug("count=%i j=%i\n", count, j); */ |
| 766 |
/* count is j - 1. */ |
| 767 |
|
| 768 |
switch (buf[1]) { |
| 769 |
case 0: |
| 770 |
debug("SREC \""); |
| 771 |
for (i=2; i<count-1; i++) { |
| 772 |
ch = bytes[i]; |
| 773 |
if (ch >= ' ' && ch < 127) |
| 774 |
debug("%c", ch); |
| 775 |
else |
| 776 |
debug("?"); |
| 777 |
} |
| 778 |
debug("\"\n"); |
| 779 |
break; |
| 780 |
case 1: |
| 781 |
case 2: |
| 782 |
case 3: |
| 783 |
/* switch again, to get the load address: */ |
| 784 |
switch (buf[1]) { |
| 785 |
case 1: data_start = 2; |
| 786 |
vaddr = (bytes[0] << 8) + bytes[1]; |
| 787 |
break; |
| 788 |
case 2: data_start = 3; |
| 789 |
vaddr = (bytes[0] << 16) + (bytes[1] << 8) + |
| 790 |
bytes[2]; |
| 791 |
break; |
| 792 |
case 3: data_start = 4; |
| 793 |
vaddr = (bytes[0] << 24) + (bytes[1] << 16) + |
| 794 |
(bytes[2] << 8) + bytes[3]; |
| 795 |
} |
| 796 |
m->cpus[0]->memory_rw(m->cpus[0], mem, vaddr, |
| 797 |
&bytes[data_start], count - 1 - data_start, |
| 798 |
MEM_WRITE, NO_EXCEPTIONS); |
| 799 |
total_bytes_loaded += count - 1 - data_start; |
| 800 |
break; |
| 801 |
case 7: |
| 802 |
case 8: |
| 803 |
case 9: |
| 804 |
/* switch again, to get the entry point: */ |
| 805 |
switch (buf[1]) { |
| 806 |
case 7: entry = (bytes[0] << 24) + (bytes[1] << 16) + |
| 807 |
(bytes[2] << 8) + bytes[3]; |
| 808 |
break; |
| 809 |
case 8: entry = (bytes[0] << 16) + (bytes[1] << 8) + |
| 810 |
bytes[2]; |
| 811 |
break; |
| 812 |
case 9: entry = (bytes[0] << 8) + bytes[1]; |
| 813 |
break; |
| 814 |
} |
| 815 |
entry_set = 1; |
| 816 |
debug("entry point 0x%08x\n", (unsigned int)entry); |
| 817 |
break; |
| 818 |
default: |
| 819 |
debug("unimplemented S-record type %i\n", buf[1]); |
| 820 |
} |
| 821 |
} |
| 822 |
|
| 823 |
debug("0x%x bytes loaded\n", total_bytes_loaded); |
| 824 |
|
| 825 |
fclose(f); |
| 826 |
|
| 827 |
if (!entry_set) |
| 828 |
debug("WARNING! no entrypoint found!\n"); |
| 829 |
else |
| 830 |
*entrypointp = entry; |
| 831 |
|
| 832 |
n_executables_loaded ++; |
| 833 |
} |
| 834 |
|
| 835 |
|
| 836 |
/* |
| 837 |
* file_load_raw(): |
| 838 |
* |
| 839 |
* Loads a raw binary into emulated memory. The filename should be |
| 840 |
* of the following form: loadaddress:filename |
| 841 |
* or loadaddress:skiplen:filename |
| 842 |
* or loadaddress:skiplen:pc:filename |
| 843 |
*/ |
| 844 |
static void file_load_raw(struct machine *m, struct memory *mem, |
| 845 |
char *filename, uint64_t *entrypointp) |
| 846 |
{ |
| 847 |
FILE *f; |
| 848 |
int len; |
| 849 |
unsigned char buf[4096]; |
| 850 |
uint64_t entry, loadaddr, vaddr, skip = 0; |
| 851 |
char *p, *p2; |
| 852 |
|
| 853 |
p = strchr(filename, ':'); |
| 854 |
if (p == NULL) { |
| 855 |
fprintf(stderr, "\n"); |
| 856 |
perror(filename); |
| 857 |
exit(1); |
| 858 |
} |
| 859 |
|
| 860 |
loadaddr = vaddr = entry = strtoull(filename, NULL, 0); |
| 861 |
p2 = p+1; |
| 862 |
|
| 863 |
/* A second value? That's the optional skip value */ |
| 864 |
p = strchr(p2, ':'); |
| 865 |
if (p != NULL) { |
| 866 |
skip = strtoull(p2, NULL, 0); |
| 867 |
p = p+1; |
| 868 |
/* A third value? That's the initial pc: */ |
| 869 |
if (strchr(p, ':') != NULL) { |
| 870 |
entry = strtoull(p, NULL, 0); |
| 871 |
p = strchr(p, ':') + 1; |
| 872 |
} |
| 873 |
} else |
| 874 |
p = p2; |
| 875 |
|
| 876 |
f = fopen(strrchr(filename, ':')+1, "r"); |
| 877 |
if (f == NULL) { |
| 878 |
perror(p); |
| 879 |
exit(1); |
| 880 |
} |
| 881 |
|
| 882 |
fseek(f, skip, SEEK_SET); |
| 883 |
|
| 884 |
/* Load file contents: */ |
| 885 |
while (!feof(f)) { |
| 886 |
len = fread(buf, 1, sizeof(buf), f); |
| 887 |
|
| 888 |
if (len > 0) |
| 889 |
m->cpus[0]->memory_rw(m->cpus[0], mem, vaddr, &buf[0], |
| 890 |
len, MEM_WRITE, NO_EXCEPTIONS); |
| 891 |
|
| 892 |
vaddr += len; |
| 893 |
} |
| 894 |
|
| 895 |
debug("RAW: 0x%llx bytes @ 0x%08llx", |
| 896 |
(long long) (ftell(f) - skip), (long long)loadaddr); |
| 897 |
if (skip != 0) |
| 898 |
debug(" (0x%llx bytes of header skipped)", (long long)skip); |
| 899 |
debug("\n"); |
| 900 |
|
| 901 |
fclose(f); |
| 902 |
|
| 903 |
*entrypointp = entry; |
| 904 |
|
| 905 |
n_executables_loaded ++; |
| 906 |
} |
| 907 |
|
| 908 |
|
| 909 |
/* |
| 910 |
* file_load_elf(): |
| 911 |
* |
| 912 |
* Loads an ELF image into the emulated memory. The entry point (read from |
| 913 |
* the ELF header) and the initial value of the gp register (read from the |
| 914 |
* ELF symbol table) are stored in the specified CPU's registers. |
| 915 |
* |
| 916 |
* This is pretty heavy stuff, but is needed because of the heaviness of |
| 917 |
* ELF files. :-/ Hopefully it will be able to recognize most valid ELFs. |
| 918 |
*/ |
| 919 |
static void file_load_elf(struct machine *m, struct memory *mem, |
| 920 |
char *filename, uint64_t *entrypointp, int arch, uint64_t *gpp, |
| 921 |
int *byte_order, uint64_t *tocp) |
| 922 |
{ |
| 923 |
Elf32_Ehdr hdr32; |
| 924 |
Elf64_Ehdr hdr64; |
| 925 |
FILE *f; |
| 926 |
uint64_t eentry; |
| 927 |
int len, i, ok; |
| 928 |
int elf64, encoding, eflags; |
| 929 |
int etype, emachine; |
| 930 |
int ephnum, ephentsize, eshnum, eshentsize; |
| 931 |
off_t ephoff, eshoff; |
| 932 |
Elf32_Phdr phdr32; |
| 933 |
Elf64_Phdr phdr64; |
| 934 |
Elf32_Shdr shdr32; |
| 935 |
Elf64_Shdr shdr64; |
| 936 |
Elf32_Sym sym32; |
| 937 |
Elf64_Sym sym64; |
| 938 |
int ofs; |
| 939 |
int chunk_len = 1024, align_len; |
| 940 |
char *symbol_strings = NULL; size_t symbol_length = 0; |
| 941 |
char *s; |
| 942 |
Elf32_Sym *symbols_sym32 = NULL; int n_symbols = 0; |
| 943 |
Elf64_Sym *symbols_sym64 = NULL; |
| 944 |
|
| 945 |
f = fopen(filename, "r"); |
| 946 |
if (f == NULL) { |
| 947 |
perror(filename); |
| 948 |
exit(1); |
| 949 |
} |
| 950 |
|
| 951 |
len = fread(&hdr32, 1, sizeof(Elf32_Ehdr), f); |
| 952 |
if (len < (signed int)sizeof(Elf32_Ehdr)) { |
| 953 |
fprintf(stderr, "%s: not an ELF file image\n", filename); |
| 954 |
exit(1); |
| 955 |
} |
| 956 |
|
| 957 |
if (memcmp(&hdr32.e_ident[EI_MAG0], ELFMAG, SELFMAG) != 0) { |
| 958 |
fprintf(stderr, "%s: not an ELF file image\n", filename); |
| 959 |
exit(1); |
| 960 |
} |
| 961 |
|
| 962 |
switch (hdr32.e_ident[EI_CLASS]) { |
| 963 |
case ELFCLASS32: |
| 964 |
elf64 = 0; |
| 965 |
break; |
| 966 |
case ELFCLASS64: |
| 967 |
elf64 = 1; |
| 968 |
fseek(f, 0, SEEK_SET); |
| 969 |
len = fread(&hdr64, 1, sizeof(Elf64_Ehdr), f); |
| 970 |
if (len < (signed int)sizeof(Elf64_Ehdr)) { |
| 971 |
fprintf(stderr, "%s: not an ELF64 file image\n", |
| 972 |
filename); |
| 973 |
exit(1); |
| 974 |
} |
| 975 |
break; |
| 976 |
default: |
| 977 |
fprintf(stderr, "%s: unknown ELF class '%i'\n", |
| 978 |
filename, hdr32.e_ident[EI_CLASS]); |
| 979 |
exit(1); |
| 980 |
} |
| 981 |
|
| 982 |
encoding = hdr32.e_ident[EI_DATA]; |
| 983 |
if (encoding != ELFDATA2LSB && encoding != ELFDATA2MSB) { |
| 984 |
fprintf(stderr, "%s: unknown data encoding '%i'\n", |
| 985 |
filename, hdr32.e_ident[EI_DATA]); |
| 986 |
exit(1); |
| 987 |
} |
| 988 |
|
| 989 |
if (elf64) { |
| 990 |
unencode(etype, &hdr64.e_type, Elf64_Quarter); |
| 991 |
unencode(eflags, &hdr64.e_flags, Elf64_Half); |
| 992 |
unencode(emachine, &hdr64.e_machine, Elf64_Quarter); |
| 993 |
unencode(eentry, &hdr64.e_entry, Elf64_Addr); |
| 994 |
unencode(ephnum, &hdr64.e_phnum, Elf64_Quarter); |
| 995 |
unencode(ephentsize, &hdr64.e_phentsize, Elf64_Quarter); |
| 996 |
unencode(ephoff, &hdr64.e_phoff, Elf64_Off); |
| 997 |
unencode(eshnum, &hdr64.e_shnum, Elf64_Quarter); |
| 998 |
unencode(eshentsize, &hdr64.e_shentsize, Elf64_Quarter); |
| 999 |
unencode(eshoff, &hdr64.e_shoff, Elf64_Off); |
| 1000 |
if (ephentsize != sizeof(Elf64_Phdr)) { |
| 1001 |
fprintf(stderr, "%s: incorrect phentsize? %i, should " |
| 1002 |
"be %i\n", filename, (int)ephentsize, |
| 1003 |
(int)sizeof(Elf64_Phdr)); |
| 1004 |
exit(1); |
| 1005 |
} |
| 1006 |
if (eshentsize != sizeof(Elf64_Shdr)) { |
| 1007 |
fprintf(stderr, "%s: incorrect phentsize? %i, should " |
| 1008 |
"be %i\n", filename, (int)ephentsize, |
| 1009 |
(int)sizeof(Elf64_Shdr)); |
| 1010 |
exit(1); |
| 1011 |
} |
| 1012 |
} else { |
| 1013 |
unencode(etype, &hdr32.e_type, Elf32_Half); |
| 1014 |
unencode(eflags, &hdr32.e_flags, Elf32_Word); |
| 1015 |
unencode(emachine, &hdr32.e_machine, Elf32_Half); |
| 1016 |
unencode(eentry, &hdr32.e_entry, Elf32_Addr); |
| 1017 |
unencode(ephnum, &hdr32.e_phnum, Elf32_Half); |
| 1018 |
unencode(ephentsize, &hdr32.e_phentsize, Elf32_Half); |
| 1019 |
unencode(ephoff, &hdr32.e_phoff, Elf32_Off); |
| 1020 |
unencode(eshnum, &hdr32.e_shnum, Elf32_Half); |
| 1021 |
unencode(eshentsize, &hdr32.e_shentsize, Elf32_Half); |
| 1022 |
unencode(eshoff, &hdr32.e_shoff, Elf32_Off); |
| 1023 |
if (ephentsize != sizeof(Elf32_Phdr)) { |
| 1024 |
fprintf(stderr, "%s: incorrect phentsize? %i, should " |
| 1025 |
"be %i\n", filename, (int)ephentsize, |
| 1026 |
(int)sizeof(Elf32_Phdr)); |
| 1027 |
exit(1); |
| 1028 |
} |
| 1029 |
if (eshentsize != sizeof(Elf32_Shdr)) { |
| 1030 |
fprintf(stderr, "%s: incorrect phentsize? %i, should " |
| 1031 |
"be %i\n", filename, (int)ephentsize, |
| 1032 |
(int)sizeof(Elf32_Shdr)); |
| 1033 |
exit(1); |
| 1034 |
} |
| 1035 |
} |
| 1036 |
|
| 1037 |
if ( etype != ET_EXEC ) { |
| 1038 |
fprintf(stderr, "%s is not an ELF Executable file, type = %i\n", |
| 1039 |
filename, etype); |
| 1040 |
exit(1); |
| 1041 |
} |
| 1042 |
|
| 1043 |
ok = 0; |
| 1044 |
switch (arch) { |
| 1045 |
case ARCH_ALPHA: |
| 1046 |
switch (emachine) { |
| 1047 |
case EM_ALPHA: |
| 1048 |
case -28634: |
| 1049 |
ok = 1; |
| 1050 |
} |
| 1051 |
break; |
| 1052 |
case ARCH_HPPA: |
| 1053 |
switch (emachine) { |
| 1054 |
case EM_PARISC: |
| 1055 |
ok = 1; |
| 1056 |
} |
| 1057 |
break; |
| 1058 |
case ARCH_MIPS: |
| 1059 |
switch (emachine) { |
| 1060 |
case EM_MIPS: |
| 1061 |
case EM_MIPS_RS3_LE: |
| 1062 |
ok = 1; |
| 1063 |
} |
| 1064 |
break; |
| 1065 |
case ARCH_PPC: |
| 1066 |
switch (emachine) { |
| 1067 |
case EM_PPC: |
| 1068 |
case EM_PPC64: |
| 1069 |
ok = 1; |
| 1070 |
} |
| 1071 |
break; |
| 1072 |
case ARCH_SPARC: |
| 1073 |
switch (emachine) { |
| 1074 |
case EM_SPARC: |
| 1075 |
case EM_SPARCV9: |
| 1076 |
ok = 1; |
| 1077 |
} |
| 1078 |
break; |
| 1079 |
case ARCH_X86: |
| 1080 |
switch (emachine) { |
| 1081 |
case EM_386: |
| 1082 |
case EM_486: |
| 1083 |
ok = 1; |
| 1084 |
break; |
| 1085 |
case EM_AMD64: |
| 1086 |
*tocp = 1; |
| 1087 |
ok = 1; |
| 1088 |
break; |
| 1089 |
} |
| 1090 |
break; |
| 1091 |
default: |
| 1092 |
fatal("file.c: INTERNAL ERROR: Unimplemented arch!\n"); |
| 1093 |
} |
| 1094 |
if (!ok) { |
| 1095 |
fprintf(stderr, "%s: this is a ", filename); |
| 1096 |
if (emachine >= 0 && emachine < N_ELF_MACHINE_TYPES) |
| 1097 |
fprintf(stderr, elf_machine_type[emachine]); |
| 1098 |
else |
| 1099 |
fprintf(stderr, "machine type '%i'", emachine); |
| 1100 |
fprintf(stderr, " ELF binary!\n"); |
| 1101 |
exit(1); |
| 1102 |
} |
| 1103 |
|
| 1104 |
s = "entry point"; |
| 1105 |
if (elf64 && arch == ARCH_PPC) |
| 1106 |
s = "function descriptor at"; |
| 1107 |
|
| 1108 |
debug("ELF%i %s, %s 0x", elf64? 64 : 32, |
| 1109 |
encoding == ELFDATA2LSB? "LSB (LE)" : "MSB (BE)", s); |
| 1110 |
|
| 1111 |
if (elf64) |
| 1112 |
debug("%016llx\n", (long long)eentry); |
| 1113 |
else |
| 1114 |
debug("%08x\n", (int)eentry); |
| 1115 |
|
| 1116 |
/* |
| 1117 |
* MIPS16 encoding? |
| 1118 |
* |
| 1119 |
* TODO: Find out what e_flag actually contains. |
| 1120 |
* TODO 2: This only sets mips16 for cpu 0. Yuck. Fix this! |
| 1121 |
*/ |
| 1122 |
|
| 1123 |
if (((eflags >> 24) & 0xff) == 0x24) { |
| 1124 |
debug("MIPS16 encoding (e_flags = 0x%08x)\n", eflags); |
| 1125 |
#ifdef ENABLE_MIPS16 |
| 1126 |
m->cpus[0]->cd.mips.mips16 = 1; |
| 1127 |
#else |
| 1128 |
fatal("ENABLE_MIPS16 must be defined in misc.h.\n" |
| 1129 |
"(or use the --mips16 configure option)\n"); |
| 1130 |
exit(1); |
| 1131 |
#endif |
| 1132 |
} else if (eentry & 0x3) { |
| 1133 |
debug("MIPS16 encoding (eentry not 32-bit aligned)\n"); |
| 1134 |
#ifdef ENABLE_MIPS16 |
| 1135 |
m->cpus[0]->cd.mips.mips16 = 1; |
| 1136 |
#else |
| 1137 |
fatal("ENABLE_MIPS16 must be defined in misc.h.\n" |
| 1138 |
"(or use the --mips16 configure option)\n"); |
| 1139 |
exit(1); |
| 1140 |
#endif |
| 1141 |
} |
| 1142 |
|
| 1143 |
/* Read the program headers: */ |
| 1144 |
|
| 1145 |
for (i=0; i<ephnum; i++) { |
| 1146 |
int p_type; |
| 1147 |
uint64_t p_offset; |
| 1148 |
uint64_t p_vaddr; |
| 1149 |
uint64_t p_paddr; |
| 1150 |
uint64_t p_filesz; |
| 1151 |
uint64_t p_memsz; |
| 1152 |
int p_flags; |
| 1153 |
int p_align; |
| 1154 |
|
| 1155 |
fseek(f, ephoff + i * ephentsize, SEEK_SET); |
| 1156 |
|
| 1157 |
if (elf64) { |
| 1158 |
fread(&phdr64, 1, sizeof(Elf64_Phdr), f); |
| 1159 |
unencode(p_type, &phdr64.p_type, Elf64_Half); |
| 1160 |
unencode(p_flags, &phdr64.p_flags, Elf64_Half); |
| 1161 |
unencode(p_offset, &phdr64.p_offset, Elf64_Off); |
| 1162 |
unencode(p_vaddr, &phdr64.p_vaddr, Elf64_Addr); |
| 1163 |
unencode(p_paddr, &phdr64.p_paddr, Elf64_Addr); |
| 1164 |
unencode(p_filesz, &phdr64.p_filesz, Elf64_Xword); |
| 1165 |
unencode(p_memsz, &phdr64.p_memsz, Elf64_Xword); |
| 1166 |
unencode(p_align, &phdr64.p_align, Elf64_Xword); |
| 1167 |
} else { |
| 1168 |
fread(&phdr32, 1, sizeof(Elf32_Phdr), f); |
| 1169 |
unencode(p_type, &phdr32.p_type, Elf32_Word); |
| 1170 |
unencode(p_offset, &phdr32.p_offset, Elf32_Off); |
| 1171 |
unencode(p_vaddr, &phdr32.p_vaddr, Elf32_Addr); |
| 1172 |
unencode(p_paddr, &phdr32.p_paddr, Elf32_Addr); |
| 1173 |
unencode(p_filesz, &phdr32.p_filesz, Elf32_Word); |
| 1174 |
unencode(p_memsz, &phdr32.p_memsz, Elf32_Word); |
| 1175 |
unencode(p_flags, &phdr32.p_flags, Elf32_Word); |
| 1176 |
unencode(p_align, &phdr32.p_align, Elf32_Word); |
| 1177 |
} |
| 1178 |
|
| 1179 |
if (p_memsz != 0 && (p_type == PT_LOAD || |
| 1180 |
(p_type & PF_MASKPROC) == PT_MIPS_REGINFO)) { |
| 1181 |
debug("chunk %i (", i); |
| 1182 |
if (p_type == PT_LOAD) |
| 1183 |
debug("load"); |
| 1184 |
else |
| 1185 |
debug("0x%08x", (int)p_type); |
| 1186 |
|
| 1187 |
debug(") @ 0x%llx, vaddr 0x", (long long)p_offset); |
| 1188 |
|
| 1189 |
if (elf64) |
| 1190 |
debug("%016llx", (long long)p_vaddr); |
| 1191 |
else |
| 1192 |
debug("%08x", (int)p_vaddr); |
| 1193 |
|
| 1194 |
debug(" len=0x%llx\n", (long long)p_memsz); |
| 1195 |
|
| 1196 |
if (p_vaddr != p_paddr) { |
| 1197 |
fprintf(stderr, "%s: vaddr != paddr. TODO: " |
| 1198 |
"how to handle this? vaddr=%016llx paddr" |
| 1199 |
"=%016llx\n", filename, (long long)p_vaddr, |
| 1200 |
(long long)p_paddr); |
| 1201 |
exit(1); |
| 1202 |
} |
| 1203 |
|
| 1204 |
if (p_memsz < p_filesz) { |
| 1205 |
fprintf(stderr, "%s: memsz < filesz. TODO: how" |
| 1206 |
" to handle this? memsz=%016llx filesz=" |
| 1207 |
"%016llx\n", filename, (long long)p_memsz, |
| 1208 |
(long long)p_filesz); |
| 1209 |
exit(1); |
| 1210 |
} |
| 1211 |
|
| 1212 |
fseek(f, p_offset, SEEK_SET); |
| 1213 |
align_len = 1; |
| 1214 |
if ((p_vaddr & 0xf)==0) align_len = 0x10; |
| 1215 |
if ((p_vaddr & 0x3f)==0) align_len = 0x40; |
| 1216 |
if ((p_vaddr & 0xff)==0) align_len = 0x100; |
| 1217 |
if ((p_vaddr & 0xfff)==0) align_len = 0x1000; |
| 1218 |
if ((p_vaddr & 0x3fff)==0) align_len = 0x4000; |
| 1219 |
if ((p_vaddr & 0xffff)==0) align_len = 0x10000; |
| 1220 |
ofs = 0; len = chunk_len = align_len; |
| 1221 |
while (ofs < (int64_t)p_filesz && len==chunk_len) { |
| 1222 |
unsigned char *ch = malloc(chunk_len); |
| 1223 |
int i = 0; |
| 1224 |
|
| 1225 |
/* Switch to larger size, if possible: */ |
| 1226 |
if (align_len < 0x10000 && |
| 1227 |
((p_vaddr + ofs) & 0xffff)==0) { |
| 1228 |
align_len = 0x10000; |
| 1229 |
len = chunk_len = align_len; |
| 1230 |
free(ch); |
| 1231 |
ch = malloc(chunk_len); |
| 1232 |
} else if (align_len < 0x1000 && |
| 1233 |
((p_vaddr + ofs) & 0xfff)==0) { |
| 1234 |
align_len = 0x1000; |
| 1235 |
len = chunk_len = align_len; |
| 1236 |
free(ch); |
| 1237 |
ch = malloc(chunk_len); |
| 1238 |
} |
| 1239 |
|
| 1240 |
if (ch == NULL) { |
| 1241 |
fprintf(stderr, "out of memory\n"); |
| 1242 |
exit(1); |
| 1243 |
} |
| 1244 |
|
| 1245 |
len = fread(&ch[0], 1, chunk_len, f); |
| 1246 |
if (ofs + len > (int64_t)p_filesz) |
| 1247 |
len = p_filesz - ofs; |
| 1248 |
|
| 1249 |
while (i < len) { |
| 1250 |
size_t len_to_copy; |
| 1251 |
len_to_copy = (i + align_len) <= len? |
| 1252 |
align_len : len - i; |
| 1253 |
m->cpus[0]->memory_rw(m->cpus[0], mem, |
| 1254 |
p_vaddr + ofs, &ch[i], len_to_copy, |
| 1255 |
MEM_WRITE, NO_EXCEPTIONS); |
| 1256 |
ofs += align_len; |
| 1257 |
i += align_len; |
| 1258 |
} |
| 1259 |
|
| 1260 |
free(ch); |
| 1261 |
} |
| 1262 |
} |
| 1263 |
} |
| 1264 |
|
| 1265 |
/* Read the section headers to find the address of the _gp symbol: */ |
| 1266 |
|
| 1267 |
for (i=0; i<eshnum; i++) { |
| 1268 |
int sh_name, sh_type, sh_flags, sh_link, sh_info, sh_entsize; |
| 1269 |
uint64_t sh_addr, sh_size, sh_addralign; |
| 1270 |
off_t sh_offset; |
| 1271 |
int n_entries; /* for reading the symbol / string tables */ |
| 1272 |
|
| 1273 |
/* debug("section header %i at %016llx\n", i, |
| 1274 |
(long long) eshoff+i*eshentsize); */ |
| 1275 |
|
| 1276 |
fseek(f, eshoff + i * eshentsize, SEEK_SET); |
| 1277 |
|
| 1278 |
if (elf64) { |
| 1279 |
len = fread(&shdr64, 1, sizeof(Elf64_Shdr), f); |
| 1280 |
if (len != sizeof(Elf64_Shdr)) { |
| 1281 |
fprintf(stderr, "couldn't read header\n"); |
| 1282 |
exit(1); |
| 1283 |
} |
| 1284 |
unencode(sh_name, &shdr64.sh_name, Elf64_Half); |
| 1285 |
unencode(sh_type, &shdr64.sh_type, Elf64_Half); |
| 1286 |
unencode(sh_flags, &shdr64.sh_flags, Elf64_Xword); |
| 1287 |
unencode(sh_addr, &shdr64.sh_addr, Elf64_Addr); |
| 1288 |
unencode(sh_offset, &shdr64.sh_offset, Elf64_Off); |
| 1289 |
unencode(sh_size, &shdr64.sh_size, Elf64_Xword); |
| 1290 |
unencode(sh_link, &shdr64.sh_link, Elf64_Half); |
| 1291 |
unencode(sh_info, &shdr64.sh_info, Elf64_Half); |
| 1292 |
unencode(sh_addralign, &shdr64.sh_addralign, |
| 1293 |
Elf64_Xword); |
| 1294 |
unencode(sh_entsize, &shdr64.sh_entsize, Elf64_Xword); |
| 1295 |
} else { |
| 1296 |
len = fread(&shdr32, 1, sizeof(Elf32_Shdr), f); |
| 1297 |
if (len != sizeof(Elf32_Shdr)) { |
| 1298 |
fprintf(stderr, "couldn't read header\n"); |
| 1299 |
exit(1); |
| 1300 |
} |
| 1301 |
unencode(sh_name, &shdr32.sh_name, Elf32_Word); |
| 1302 |
unencode(sh_type, &shdr32.sh_type, Elf32_Word); |
| 1303 |
unencode(sh_flags, &shdr32.sh_flags, Elf32_Word); |
| 1304 |
unencode(sh_addr, &shdr32.sh_addr, Elf32_Addr); |
| 1305 |
unencode(sh_offset, &shdr32.sh_offset, Elf32_Off); |
| 1306 |
unencode(sh_size, &shdr32.sh_size, Elf32_Word); |
| 1307 |
unencode(sh_link, &shdr32.sh_link, Elf32_Word); |
| 1308 |
unencode(sh_info, &shdr32.sh_info, Elf32_Word); |
| 1309 |
unencode(sh_addralign, &shdr32.sh_addralign,Elf32_Word); |
| 1310 |
unencode(sh_entsize, &shdr32.sh_entsize, Elf32_Word); |
| 1311 |
} |
| 1312 |
|
| 1313 |
/* debug("sh_name=%04lx, sh_type=%08lx, sh_flags=%08lx" |
| 1314 |
" sh_size=%06lx sh_entsize=%03lx\n", |
| 1315 |
(long)sh_name, (long)sh_type, (long)sh_flags, |
| 1316 |
(long)sh_size, (long)sh_entsize); */ |
| 1317 |
|
| 1318 |
/* Perhaps it is bad to reuse sh_entsize like this? TODO */ |
| 1319 |
if (elf64) |
| 1320 |
sh_entsize = sizeof(Elf64_Sym); |
| 1321 |
else |
| 1322 |
sh_entsize = sizeof(Elf32_Sym); |
| 1323 |
|
| 1324 |
if (sh_type == SHT_SYMTAB) { |
| 1325 |
size_t len; |
| 1326 |
n_entries = sh_size / sh_entsize; |
| 1327 |
|
| 1328 |
fseek(f, sh_offset, SEEK_SET); |
| 1329 |
|
| 1330 |
if (elf64) { |
| 1331 |
if (symbols_sym64 != NULL) |
| 1332 |
free(symbols_sym64); |
| 1333 |
symbols_sym64 = malloc(sh_size); |
| 1334 |
if (symbols_sym64 == NULL) { |
| 1335 |
fprintf(stderr, "out of memory\n"); |
| 1336 |
exit(1); |
| 1337 |
} |
| 1338 |
|
| 1339 |
len = fread(symbols_sym64, 1, sh_entsize * |
| 1340 |
n_entries, f); |
| 1341 |
} else { |
| 1342 |
if (symbols_sym32 != NULL) |
| 1343 |
free(symbols_sym32); |
| 1344 |
symbols_sym32 = malloc(sh_size); |
| 1345 |
if (symbols_sym32 == NULL) { |
| 1346 |
fprintf(stderr, "out of memory\n"); |
| 1347 |
exit(1); |
| 1348 |
} |
| 1349 |
|
| 1350 |
len = fread(symbols_sym32, 1, |
| 1351 |
sh_entsize * n_entries, f); |
| 1352 |
} |
| 1353 |
|
| 1354 |
if (len != sh_size) { |
| 1355 |
fprintf(stderr, "could not read symbols from " |
| 1356 |
"%s\n", filename); |
| 1357 |
exit(1); |
| 1358 |
} |
| 1359 |
|
| 1360 |
debug("%i symbol entries at 0x%llx\n", |
| 1361 |
(int)n_entries, (long long)sh_offset); |
| 1362 |
|
| 1363 |
n_symbols = n_entries; |
| 1364 |
} |
| 1365 |
|
| 1366 |
/* |
| 1367 |
* TODO: This is incorrect, there may be several strtab |
| 1368 |
* sections. |
| 1369 |
* |
| 1370 |
* For now, the simple/stupid guess that the largest string |
| 1371 |
* table is the one to use seems to be good enough. |
| 1372 |
*/ |
| 1373 |
|
| 1374 |
if (sh_type == SHT_STRTAB && sh_size > symbol_length) { |
| 1375 |
size_t len; |
| 1376 |
|
| 1377 |
if (symbol_strings != NULL) |
| 1378 |
free(symbol_strings); |
| 1379 |
|
| 1380 |
symbol_strings = malloc(sh_size + 1); |
| 1381 |
if (symbol_strings == NULL) { |
| 1382 |
fprintf(stderr, "out of memory\n"); |
| 1383 |
exit(1); |
| 1384 |
} |
| 1385 |
|
| 1386 |
fseek(f, sh_offset, SEEK_SET); |
| 1387 |
len = fread(symbol_strings, 1, sh_size, f); |
| 1388 |
if (len != sh_size) { |
| 1389 |
fprintf(stderr, "could not read symbols from " |
| 1390 |
"%s\n", filename); |
| 1391 |
exit(1); |
| 1392 |
} |
| 1393 |
|
| 1394 |
debug("%i bytes of symbol strings at 0x%llx\n", |
| 1395 |
(int)sh_size, (long long)sh_offset); |
| 1396 |
|
| 1397 |
symbol_strings[sh_size] = '\0'; |
| 1398 |
symbol_length = sh_size; |
| 1399 |
} |
| 1400 |
} |
| 1401 |
|
| 1402 |
fclose(f); |
| 1403 |
|
| 1404 |
/* Decode symbols: */ |
| 1405 |
if (symbol_strings != NULL) { |
| 1406 |
for (i=0; i<n_symbols; i++) { |
| 1407 |
uint64_t st_name, addr, size; |
| 1408 |
int st_info; |
| 1409 |
|
| 1410 |
if (elf64) { |
| 1411 |
sym64 = symbols_sym64[i]; |
| 1412 |
unencode(st_name, &sym64.st_name, Elf64_Half); |
| 1413 |
unencode(st_info, &sym64.st_info, Elf_Byte); |
| 1414 |
unencode(addr, &sym64.st_value, Elf64_Addr); |
| 1415 |
unencode(size, &sym64.st_size, Elf64_Xword); |
| 1416 |
} else { |
| 1417 |
sym32 = symbols_sym32[i]; |
| 1418 |
unencode(st_name, &sym32.st_name, Elf32_Word); |
| 1419 |
unencode(st_info, &sym64.st_info, Elf_Byte); |
| 1420 |
unencode(addr, &sym32.st_value, Elf32_Word); |
| 1421 |
unencode(size, &sym32.st_size, Elf32_Word); |
| 1422 |
} |
| 1423 |
|
| 1424 |
if (size == 0) |
| 1425 |
size ++; |
| 1426 |
|
| 1427 |
if (addr != 0) { |
| 1428 |
/* debug("symbol info=0x%02x addr=0x%016llx" |
| 1429 |
" '%s'\n", st_info, (long long)addr, |
| 1430 |
symbol_strings + st_name); */ |
| 1431 |
add_symbol_name(&m->symbol_context, |
| 1432 |
addr, size, symbol_strings + st_name, 0); |
| 1433 |
} |
| 1434 |
|
| 1435 |
if (strcmp(symbol_strings + st_name, "_gp") == 0) { |
| 1436 |
debug("found _gp address: 0x"); |
| 1437 |
if (elf64) |
| 1438 |
debug("%016llx\n", (long long)addr); |
| 1439 |
else |
| 1440 |
debug("%08x\n", (int)addr); |
| 1441 |
*gpp = addr; |
| 1442 |
} |
| 1443 |
} |
| 1444 |
} |
| 1445 |
|
| 1446 |
*entrypointp = eentry; |
| 1447 |
|
| 1448 |
if (encoding == ELFDATA2LSB) |
| 1449 |
*byte_order = EMUL_LITTLE_ENDIAN; |
| 1450 |
else |
| 1451 |
*byte_order = EMUL_BIG_ENDIAN; |
| 1452 |
|
| 1453 |
if (elf64 && arch == ARCH_PPC) { |
| 1454 |
/* |
| 1455 |
* Special case for 64-bit PPC ELFs: |
| 1456 |
* |
| 1457 |
* The ELF starting symbol points to a ".opd" section |
| 1458 |
* which contains a function descriptor: |
| 1459 |
* |
| 1460 |
* uint64_t start; |
| 1461 |
* uint64_t toc_base; |
| 1462 |
* uint64_t something_else; (?) |
| 1463 |
*/ |
| 1464 |
int res; |
| 1465 |
unsigned char b[sizeof(uint64_t)]; |
| 1466 |
uint64_t toc_base; |
| 1467 |
|
| 1468 |
debug("PPC64: "); |
| 1469 |
|
| 1470 |
res = m->cpus[0]->memory_rw(m->cpus[0], mem, eentry, b, |
| 1471 |
sizeof(b), MEM_READ, NO_EXCEPTIONS); |
| 1472 |
if (!res) |
| 1473 |
debug(" [WARNING: could not read memory?] "); |
| 1474 |
|
| 1475 |
/* PPC are always big-endian: */ |
| 1476 |
*entrypointp = ((uint64_t)b[0] << 56) + |
| 1477 |
((uint64_t)b[1] << 48) + ((uint64_t)b[2] << 40) + |
| 1478 |
((uint64_t)b[3] << 32) + ((uint64_t)b[4] << 24) + |
| 1479 |
((uint64_t)b[5] << 16) + ((uint64_t)b[6] << 8) + |
| 1480 |
(uint64_t)b[7]; |
| 1481 |
|
| 1482 |
res = m->cpus[0]->memory_rw(m->cpus[0], mem, eentry + 8, |
| 1483 |
b, sizeof(b), MEM_READ, NO_EXCEPTIONS); |
| 1484 |
if (!res) |
| 1485 |
fatal(" [WARNING: could not read memory?] "); |
| 1486 |
|
| 1487 |
toc_base = ((uint64_t)b[0] << 56) + |
| 1488 |
((uint64_t)b[1] << 48) + ((uint64_t)b[2] << 40) + |
| 1489 |
((uint64_t)b[3] << 32) + ((uint64_t)b[4] << 24) + |
| 1490 |
((uint64_t)b[5] << 16) + ((uint64_t)b[6] << 8) + |
| 1491 |
(uint64_t)b[7]; |
| 1492 |
|
| 1493 |
debug("entrypoint 0x%016llx, toc_base 0x%016llx\n", |
| 1494 |
(long long)*entrypointp, (long long)toc_base); |
| 1495 |
if (tocp != NULL) |
| 1496 |
*tocp = toc_base; |
| 1497 |
} |
| 1498 |
|
| 1499 |
n_executables_loaded ++; |
| 1500 |
} |
| 1501 |
|
| 1502 |
|
| 1503 |
/* |
| 1504 |
* file_n_executables_loaded(): |
| 1505 |
* |
| 1506 |
* Returns the number of executable files loaded into emulated memory. |
| 1507 |
*/ |
| 1508 |
int file_n_executables_loaded(void) |
| 1509 |
{ |
| 1510 |
return n_executables_loaded; |
| 1511 |
} |
| 1512 |
|
| 1513 |
|
| 1514 |
/* |
| 1515 |
* file_load(): |
| 1516 |
* |
| 1517 |
* Sense the file format of a file (ELF, a.out, ecoff), and call the |
| 1518 |
* right file_load_XXX() function. If the file isn't of a recognized |
| 1519 |
* binary format, assume that it contains symbol definitions. |
| 1520 |
* |
| 1521 |
* If the filename doesn't exist, try to treat the name as |
| 1522 |
* "address:filename" and load the file as a raw binary. |
| 1523 |
*/ |
| 1524 |
void file_load(struct machine *machine, struct memory *mem, |
| 1525 |
char *filename, uint64_t *entrypointp, |
| 1526 |
int arch, uint64_t *gpp, int *byte_orderp, uint64_t *tocp) |
| 1527 |
{ |
| 1528 |
int iadd = 4; |
| 1529 |
FILE *f; |
| 1530 |
unsigned char buf[12]; |
| 1531 |
int len, i; |
| 1532 |
off_t size; |
| 1533 |
|
| 1534 |
if (byte_orderp == NULL) { |
| 1535 |
fprintf(stderr, "file_load(): byte_order == NULL\n"); |
| 1536 |
exit(1); |
| 1537 |
} |
| 1538 |
|
| 1539 |
if (arch == ARCH_NOARCH) { |
| 1540 |
fprintf(stderr, "file_load(): FATAL ERROR: no arch?\n"); |
| 1541 |
exit(1); |
| 1542 |
} |
| 1543 |
|
| 1544 |
if (mem == NULL || filename == NULL) { |
| 1545 |
fprintf(stderr, "file_load(): mem or filename is NULL\n"); |
| 1546 |
exit(1); |
| 1547 |
} |
| 1548 |
|
| 1549 |
/* Skip configuration files: */ |
| 1550 |
if (filename[0] == '@') |
| 1551 |
return; |
| 1552 |
|
| 1553 |
debug("loading %s:\n", filename); |
| 1554 |
debug_indentation(iadd); |
| 1555 |
|
| 1556 |
f = fopen(filename, "r"); |
| 1557 |
if (f == NULL) { |
| 1558 |
file_load_raw(machine, mem, filename, entrypointp); |
| 1559 |
goto ret; |
| 1560 |
} |
| 1561 |
|
| 1562 |
fseek(f, 0, SEEK_END); |
| 1563 |
size = ftell(f); |
| 1564 |
fseek(f, 0, SEEK_SET); |
| 1565 |
|
| 1566 |
memset(buf, 0, sizeof(buf)); |
| 1567 |
len = fread(buf, 1, sizeof(buf), f); |
| 1568 |
fclose(f); |
| 1569 |
|
| 1570 |
if (len < (signed int)sizeof(buf)) { |
| 1571 |
fprintf(stderr, "\nThis file is too small to contain " |
| 1572 |
"anything useful\n"); |
| 1573 |
exit(1); |
| 1574 |
} |
| 1575 |
|
| 1576 |
/* Is it an ELF? */ |
| 1577 |
if (buf[0] == 0x7f && buf[1]=='E' && buf[2]=='L' && buf[3]=='F') { |
| 1578 |
file_load_elf(machine, mem, filename, |
| 1579 |
entrypointp, arch, gpp, byte_orderp, tocp); |
| 1580 |
goto ret; |
| 1581 |
} |
| 1582 |
|
| 1583 |
/* Is it an a.out? (Special case for DEC OSF1 kernels.) */ |
| 1584 |
if (buf[0]==0x00 && buf[1]==0x8b && buf[2]==0x01 && buf[3]==0x07) { |
| 1585 |
file_load_aout(machine, mem, filename, 0, |
| 1586 |
entrypointp, arch, byte_orderp); |
| 1587 |
goto ret; |
| 1588 |
} |
| 1589 |
if (buf[0]==0x00 && buf[2]==0x00 && buf[8]==0x7a && buf[9]==0x75) { |
| 1590 |
file_load_aout(machine, mem, filename, 1, |
| 1591 |
entrypointp, arch, byte_orderp); |
| 1592 |
goto ret; |
| 1593 |
} |
| 1594 |
|
| 1595 |
/* |
| 1596 |
* Is it an ecoff? |
| 1597 |
* |
| 1598 |
* TODO: What's the deal with the magic value's byte order? Sometimes |
| 1599 |
* it seems to be reversed for BE when compared to LE, but not always? |
| 1600 |
*/ |
| 1601 |
if (buf[0]+256*buf[1] == ECOFF_MAGIC_MIPSEB || |
| 1602 |
buf[0]+256*buf[1] == ECOFF_MAGIC_MIPSEL || |
| 1603 |
buf[0]+256*buf[1] == ECOFF_MAGIC_MIPSEB2 || |
| 1604 |
buf[0]+256*buf[1] == ECOFF_MAGIC_MIPSEL2 || |
| 1605 |
buf[0]+256*buf[1] == ECOFF_MAGIC_MIPSEB3 || |
| 1606 |
buf[0]+256*buf[1] == ECOFF_MAGIC_MIPSEL3 || |
| 1607 |
buf[1]+256*buf[0] == ECOFF_MAGIC_MIPSEB || |
| 1608 |
buf[1]+256*buf[0] == ECOFF_MAGIC_MIPSEL || |
| 1609 |
buf[1]+256*buf[0] == ECOFF_MAGIC_MIPSEB2 || |
| 1610 |
buf[1]+256*buf[0] == ECOFF_MAGIC_MIPSEL2 || |
| 1611 |
buf[1]+256*buf[0] == ECOFF_MAGIC_MIPSEB3 || |
| 1612 |
buf[1]+256*buf[0] == ECOFF_MAGIC_MIPSEL3) { |
| 1613 |
file_load_ecoff(machine, mem, filename, entrypointp, |
| 1614 |
arch, gpp, byte_orderp); |
| 1615 |
goto ret; |
| 1616 |
} |
| 1617 |
|
| 1618 |
/* Is it a Motorola SREC file? */ |
| 1619 |
if ((buf[0]=='S' && buf[1]>='0' && buf[1]<='9')) { |
| 1620 |
file_load_srec(machine, mem, filename, entrypointp); |
| 1621 |
goto ret; |
| 1622 |
} |
| 1623 |
|
| 1624 |
/* gzipped files are not supported: */ |
| 1625 |
if (buf[0]==0x1f && buf[1]==0x8b) { |
| 1626 |
fprintf(stderr, "\nYou need to gunzip the file before you" |
| 1627 |
" try to use it.\n"); |
| 1628 |
exit(1); |
| 1629 |
} |
| 1630 |
|
| 1631 |
if (size > 24000000) { |
| 1632 |
fprintf(stderr, "\nThis file is very large (%lli bytes)\n", |
| 1633 |
(long long)size); |
| 1634 |
fprintf(stderr, "Are you sure it is a kernel and not a disk " |
| 1635 |
"image?\n"); |
| 1636 |
exit(1); |
| 1637 |
} |
| 1638 |
|
| 1639 |
if (size == 1474560) |
| 1640 |
fprintf(stderr, "Hm... this file is the size of a 1.44 MB " |
| 1641 |
"floppy image. Maybe you forgot the\n-d switch?\n"); |
| 1642 |
|
| 1643 |
/* |
| 1644 |
* Last resort: symbol definitions from nm (or nm -S): |
| 1645 |
* |
| 1646 |
* If the buf contains typical 'binary' characters, then print |
| 1647 |
* an error message and quit instead of assuming that it is a |
| 1648 |
* symbol file. |
| 1649 |
*/ |
| 1650 |
for (i=0; i<(signed)sizeof(buf); i++) |
| 1651 |
if (buf[i] < 32 && buf[i] != '\t' && |
| 1652 |
buf[i] != '\n' && buf[i] != '\r' && |
| 1653 |
buf[i] != '\f') { |
| 1654 |
fprintf(stderr, "\nThe file format of '%s' is " |
| 1655 |
"unknown.\n\n ", filename); |
| 1656 |
for (i=0; i<(signed)sizeof(buf); i++) |
| 1657 |
fprintf(stderr, " %02x", buf[i]); |
| 1658 |
fprintf(stderr, "\n\nPossible explanations:\n\n" |
| 1659 |
" o) If this is a disk image, you forgot '-d' " |
| 1660 |
"on the command line.\n" |
| 1661 |
" o) This is an unsupported binary format.\n\n"); |
| 1662 |
exit(1); |
| 1663 |
} |
| 1664 |
|
| 1665 |
symbol_readfile(&machine->symbol_context, filename); |
| 1666 |
|
| 1667 |
ret: |
| 1668 |
debug_indentation(-iadd); |
| 1669 |
} |
| 1670 |
|
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