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/*
* <pef.c>
*
* Open Hack'Ware BIOS Classic MacOS executable file loader
*
* Copyright (c) 2004-2005 Jocelyn Mayer
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License V2
* as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <stdlib.h>
#include <stdio.h>
#include "bios.h"
#include "exec.h"
/* PEF (old MacOS executable format) */
typedef struct PEF_container_t PEF_container_t;
struct PEF_container_t {
uint32_t tag1;
uint32_t tag2;
uint32_t arch;
uint32_t version;
uint32_t timestamp;
uint32_t oldDefVersion;
uint32_t oldImpVersion;
uint32_t currentVersion;
uint16_t nb_sections;
uint16_t nb_inst_sections;
uint32_t pad;
} __attribute__ (( packed ));
typedef struct PEF_section_t PEF_section_t;
struct PEF_section_t {
int32_t name_offset;
uint32_t address;
uint32_t total_size;
uint32_t unpacked_size;
uint32_t packed_size;
uint32_t container_offset;
uint8_t section_kind;
uint8_t share_kind;
uint8_t align;
uint8_t pad;
} __attribute__ (( packed ));
typedef struct PEF_loader_t PEF_loader_t;
struct PEF_loader_t {
int32_t main_section;
uint32_t main_offset;
int32_t init_section;
uint32_t init_offset;
int32_t term_section;
uint32_t term_offset;
uint32_t nb_import_libs;
uint32_t nb_import_symbols;
uint32_t nb_reloc_sections;
uint32_t reloc_instr_offset;
uint32_t loader_strings_offset;
uint32_t export_hash_offset;
uint32_t export_hashtable_power;
uint32_t nb_export_symbols;
} __attribute__ (( packed ));
enum {
PEF_SECTION_CODE = 0,
PEF_SECTION_UNPDATA = 1,
PEF_SECTION_INIDATA = 2,
PEF_SECTION_CONSTANT = 3,
PEF_SECTION_LOADER = 4,
PEF_SECTION_DEBUG = 5,
PEF_SECTION_EXEC = 6,
PEF_SECTION_EXCP = 7,
PEF_SECTION_TRACE = 8,
};
enum {
PEF_SHARE_PROCESS = 1,
PEF_SHARE_GLOBAL = 4,
PEF_SHARE_PROTECTED = 5,
};
int exec_load_pef (inode_t *file, void **dest, void **entry, void **end,
uint32_t loffset)
{
PEF_container_t container;
PEF_section_t section;
PEF_loader_t loader;
void *first, *last, *addr, **sections;
uint32_t pos, padsize, size, lpos, main_offset;
uint8_t opcode;
int nb_sections, nb_inst_sections, main_section, i, n;
file_seek(file, loffset);
if (fs_read(file, &container, sizeof(PEF_container_t)) < 0) {
ERROR("Cannot load container header\n");
return -1;
}
pos = sizeof(PEF_container_t);
/* Check tags and architecture */
if (memcmp(&container.tag1, "Joy!", 4) != 0) {
DPRINTF("No joy, no PEF\n");
return -2;
}
if (memcmp(&container.tag2, "peff", 4) != 0) {
DPRINTF("No PEFF file\n");
return -2;
}
if (memcmp(&container.arch, "pwpc", 4) != 0) {
DPRINTF("PEFF file not for PPC\n");
return -2;
}
if (get_be32(&container.version) != 1) {
DPRINTF("Unknown PEFF container version\n");
return -2;
}
nb_sections = get_be32(&container.nb_sections);
sections = malloc(nb_sections * sizeof(void *));
if (sections == NULL) {
ERROR("Cannot allocate sections\n");
return -1;
}
nb_inst_sections = get_be32(&container.nb_inst_sections);
first = (void *)0xFFFFFFFF;
last = NULL;
main_section = -1;
main_offset = 0;
for (i = 0, n = 0; i < nb_sections; i++) {
file_seek(file, loffset + pos);
if (fs_read(file, §ion, sizeof(PEF_section_t)) < 0) {
ERROR("Cannot read section %d\n", i);
return -1;
}
pos += sizeof(PEF_section_t);
addr = (void *)get_be32(§ion.address);
sections[i] = addr;
if (addr < first)
first = addr;
size = get_be32(§ion.total_size);
lpos = get_be32(§ion.container_offset);
file_seek(file, loffset + lpos);
switch (section.section_kind) {
case PEF_SECTION_CODE:
case PEF_SECTION_UNPDATA:
/* Load as raw data */
padsize = get_be32(§ion.unpacked_size) - size;
file_seek(file, loffset + lpos);
if (fs_read(file, addr, size) < 0) {
ERROR("Cannot load section %d\n", i);
return -1;
}
addr = (char *)addr + size;
memset(addr, 0, padsize);
addr = (char *)addr + padsize;
break;
case PEF_SECTION_INIDATA:
case PEF_SECTION_CONSTANT:
case PEF_SECTION_EXEC:
/* Load as compressed data */
for (;;) {
void *ref;
uint32_t total;
uint8_t bsize, csize, count, j;
if (fs_read(file, &opcode, 1) < 0) {
ERROR("Cannot get opcode\n");
return -1;
}
bsize = opcode & 0x1F;
switch (opcode >> 5) {
case 0x0:
/* Initialize size bytes to zero */
memset(addr, 0, bsize);
addr = (char *)addr + bsize;
total = bsize;
break;
case 0x1:
/* Copy bloc */
if (fs_read(file, addr, bsize) < 0) {
ERROR("Cannot copy bloc\n");
return -1;
}
addr = (char *)addr + bsize;
total = bsize;
break;
case 0x2:
/* Repeat bloc */
if (fs_read(file, &count, 1) < 0) {
ERROR("Cannot read bloc size\n");
return -1;
}
total = 0;
if (count == 0) {
break;
}
if (fs_read(file, addr, bsize) < 0) {
ERROR("Cannot read repeat bloc\n");
return -1;
}
ref = addr;
addr = (char *)addr + bsize;
for (j = 1; j < count; j++) {
memcpy(addr, ref, bsize);
total += bsize;
addr = (char *)addr + bsize;
}
break;
case 0x3:
/* Interleave repeat bloc with bloc copy */
if (fs_read(file, &csize, 1) < 0 ||
fs_read(file, &count, 1) < 0) {
ERROR("Cannot read repeat params\n");
return -1;
}
ref = addr;
if (fs_read(file, addr, bsize) < 0) {
ERROR("Cannot read common data\n");
return -1;
}
addr = (char *)addr + bsize;
total = bsize;
for (j = 0; j < count; j++) {
if (fs_read(file, addr, csize) < 0) {
ERROR("Cannot read custom data\n");
return -1;
}
addr = (char *)addr + csize;
memcpy(addr, ref, bsize);
addr = (char *)addr + bsize;
total += csize + bsize;
}
break;
case 0x4:
/* Interleave repeat bloc with zero */
if (fs_read(file, &csize, 1) < 0 ||
fs_read(file, &count, 1) < 0) {
ERROR("Cannot read repeat params\n");
return -1;
}
total = 0;
for (j = 0; j < count; j++) {
memset(addr, 0, bsize);
addr = (char *)addr + bsize;
if (fs_read(file, addr, csize) < 0) {
ERROR("Cannot read repeat data\n");
return -1;
}
addr = (char *)addr + csize;
total += csize + bsize;
}
memset(addr, 0, bsize);
addr = (char *)addr + bsize;
total += bsize;
break;
default:
ERROR("Unknown opcode\n");
return -1;
}
if (addr > last)
last = addr;
if (total >= size)
break;
size -= total;
}
break;
case PEF_SECTION_LOADER:
/* find entry point */
if (fs_read(file, &loader, sizeof(PEF_loader_t)) < 0) {
ERROR("Cannot read loader header\n");
return -1;
}
main_section = get_be32(&loader.main_section);
main_offset = get_be32(&loader.main_offset);
if (main_section >= nb_sections) {
ERROR("Invalid main section\n");
return -1;
}
break;
case PEF_SECTION_DEBUG:
case PEF_SECTION_EXCP:
case PEF_SECTION_TRACE:
break;
default:
return -2;
}
}
*dest = first;
*end = last;
if (main_section == -1) {
*entry = first;
} else {
*entry = (char *)sections[main_section] + main_offset;
}
free(sections);
return 0;
}
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