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dpavlin |
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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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dpavlin |
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* $Id: file_aout.c,v 1.2 2007/04/19 15:18:16 debug Exp $ |
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dpavlin |
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* |
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* a.out file support. |
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*/ |
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/* Note: Included from file.c. */ |
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#include "exec_aout.h" |
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#define AOUT_FLAG_DECOSF1 1 |
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#define AOUT_FLAG_FROM_BEGINNING 2 |
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#define AOUT_FLAG_VADDR_ZERO_HACK 4 |
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#define AOUT_FLAG_NO_SIZES 8 |
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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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* 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 flags, |
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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[65536]; |
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unsigned char *syms; |
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if (m->cpus[0]->byte_order == EMUL_BIG_ENDIAN) |
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encoding = ELFDATA2MSB; |
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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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if (flags & AOUT_FLAG_DECOSF1) { |
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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) + ((uint64_t)buf[19] << 24); |
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entry = buf[20] + (buf[21] << 8) + |
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(buf[22] << 16) + ((uint64_t)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 = ftello(f) - 512; |
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datasize = 0; |
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fseek(f, 512, SEEK_SET); |
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} else if (flags & AOUT_FLAG_NO_SIZES) { |
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fseek(f, 0, SEEK_END); |
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textsize = ftello(f) - 32; |
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datasize = 0; |
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vaddr = entry = 0; |
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fseek(f, 32, 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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unencode(entry, &aout_header.a_entry, uint32_t); |
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debug("a.out, entry point 0x%08lx\n", (long)entry); |
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vaddr = entry; |
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if (flags & AOUT_FLAG_VADDR_ZERO_HACK) |
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vaddr = 0; |
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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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unencode(symbsize, &aout_header.a_syms, uint32_t); |
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} |
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if (flags & AOUT_FLAG_FROM_BEGINNING) { |
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fseek(f, 0, SEEK_SET); |
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vaddr &= ~0xfff; |
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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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/* printf("fread len=%i vaddr=%x buf[0..]=%02x %02x %02x\n", |
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(int)len, (int)vaddr, buf[0], buf[1], buf[2]); */ |
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if (len > 0) { |
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int len2 = 0; |
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uint64_t vaddr1 = vaddr & |
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((1 << BITS_PER_MEMBLOCK) - 1); |
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uint64_t vaddr2 = (vaddr + |
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len) & ((1 << BITS_PER_MEMBLOCK) - 1); |
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if (vaddr2 < vaddr1) { |
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len2 = len - vaddr2; |
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m->cpus[0]->memory_rw(m->cpus[0], mem, vaddr, |
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&buf[0], len2, MEM_WRITE, NO_EXCEPTIONS); |
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} |
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m->cpus[0]->memory_rw(m->cpus[0], mem, vaddr + len2, |
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&buf[len2], len-len2, MEM_WRITE, NO_EXCEPTIONS); |
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} else { |
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if (flags & AOUT_FLAG_DECOSF1) |
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break; |
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else { |
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dpavlin |
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fprintf(stderr, "could not read from %s," |
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" wanted to read %i bytes\n", filename, |
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(int) total_len); |
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dpavlin |
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exit(1); |
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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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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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debug("symbols: %i bytes @ 0x%x\n", symbsize, (int)ftello(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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oldpos = ftello(f); |
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fseek(f, 0, SEEK_END); |
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strings_len = ftello(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)ftello(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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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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/* debug("symbol type 0x%04x @ 0x%08x: %s\n", |
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type, addr, string_symbols + str_index); */ |
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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, -1); |
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i++; |
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} |
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free(string_symbols); |
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free(syms); |
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} |
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fclose(f); |
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*entrypointp = (int32_t)entry; |
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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; |
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n_executables_loaded ++; |
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} |
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