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#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include "vos_program_module.h"
static uint16_t big16(uint8_t ** src)
{
uint16_t ret = *((*src)++) << 8;
ret |= *((*src)++);
return ret;
}
static uint32_t big32(uint8_t ** src)
{
uint32_t ret = *((*src)++) << 24;
ret |= *((*src)++) << 16;
ret |= *((*src)++) << 8;
ret |= *((*src)++);
return ret;
}
static void string_(uint8_t ** src, uint16_t *len, char * str, uint32_t storage)
{
*len = big16(src);
memcpy(str, *src, storage);
*src += storage;
if (*len >= storage)
{
*len = storage;
} else {
str[*len] = 0;
}
if (storage & 1)
{
(*src)++;
}
}
#define string(src, field) string_(src, &(field).len, (field).str, sizeof((field).str))
int vos_read_header(FILE * f, vos_program_module *out)
{
uint8_t buffer[4096];
if (fread(buffer, 1, sizeof(buffer), f) != sizeof(buffer))
{
return 0;
}
uint8_t *cur = buffer;
out->version = big16(&cur);
string(&cur, out->binder_version);
string(&cur, out->binder_options);
string(&cur, out->system_name);
string(&cur, out->user_name);
out->date_bound = big32(&cur);
out->main_entry_link.code_address = big32(&cur);
out->main_entry_link.static_address = big32(&cur);
out->user_boundary = big32(&cur);
out->n_modules = big16(&cur);
out->n_external_vars = big16(&cur);
out->n_link_names = big16(&cur);
out->n_unsnapped_links = big16(&cur);
out->n_vm_pages = big16(&cur);
out->n_header_pages = big16(&cur);
for (int i = 0; i < 3; i++)
{
for (int j = 0; j < 4; j++)
{
out->info[i][j].address = big32(&cur);
out->info[i][j].len = big32(&cur);
}
}
out->module_map_address = big32(&cur);
out->module_map_len = big32(&cur);
out->external_vars_map_address = big32(&cur);
out->external_vars_map_len = big32(&cur);
out->link_names_map_address = big32(&cur);
out->link_names_map_len = big32(&cur);
out->link_map_address = big32(&cur);
out->link_map_len = big32(&cur);
out->header_address = big32(&cur);
out->header_len = big32(&cur);
memcpy(out->access_info, cur, sizeof(out->access_info));
cur += sizeof(out->access_info);
out->flags = big32(&cur);
out->n_tasks = big16(&cur);
for (int i = 0; i < 3; i++)
{
out->task_static_len[i] = big32(&cur);
}
out->stack_len = big32(&cur);
out->n_entries = big16(&cur);
out->entry_map_address = big32(&cur);
out->entry_map_len = big32(&cur);
out->pop_version = big16(&cur);
out->processor = big16(&cur);
string(&cur, out->release_name);
out->relocation_info.map_address = big32(&cur);
out->relocation_info.map_len = big32(&cur);
out->relocation_info.n_relocations = big32(&cur);
out->high_water_mark = big32(&cur);
string(&cur, out->copyright_notice);
for (int i = 0; i < 14; i++)
{
out->module_origins[i] = big32(&cur);
}
out->processor_family = big16(&cur);
string(&cur, out->program_name);
out->string_pool_address = big32(&cur);
out->string_pool_len = big32(&cur);
out->obj_dir_map_address = big32(&cur);
out->obj_dir_map_len = big32(&cur);
for (int i = 0; i < 3; i++)
{
out->global_offset_table_address[i] = big32(&cur);
}
for (int i = 0; i < 3; i++)
{
out->block_map_info[i].address = big32(&cur);
out->block_map_info[i].len = big32(&cur);
}
out->section_map_file_address = big32(&cur);
out->section_map_address = big32(&cur);
out->section_map_len = big32(&cur);
out->n_sections = big16(&cur);
out->max_heap_size = big32(&cur);
out->max_program_size = big32(&cur);
out->max_stack_size = big32(&cur);
out->stack_fence_size = big32(&cur);
out->module_map_entries = NULL;
out->external_vars = NULL;
return 1;
}
#define MODULE_MAP_ENTRY_SIZE 74
int vos_read_alloc_module_map(FILE * f, vos_program_module *header)
{
if (header->module_map_len != header->n_modules * MODULE_MAP_ENTRY_SIZE)
{
return 0;
}
uint8_t * buf = malloc(header->module_map_len);
fseek(f, header->module_map_address + 0x1000 - header->user_boundary, SEEK_SET);
if (fread(buf, 1, header->module_map_len, f) != header->module_map_len)
{
free(buf);
return 0;
}
uint8_t * cur = buf;
header->module_map_entries = malloc(sizeof(vos_module_map_entry) * header->n_modules);
for (int i = 0; i < header->n_modules; i++)
{
string(&cur, header->module_map_entries[i].name);
for (int j = 0; j < 5; j++)
{
header->module_map_entries[i].unknown[j] = big16(&cur);
}
header->module_map_entries[i].code_address = big32(&cur);
header->module_map_entries[i].code_length = big32(&cur);
header->module_map_entries[i].foo_address = big32(&cur);
header->module_map_entries[i].foo_length = big32(&cur);
header->module_map_entries[i].bar_address = big32(&cur);
header->module_map_entries[i].bar_length = big32(&cur);
for (int j = 0; j < 3; j++)
{
header->module_map_entries[i].unknown2[j] = big16(&cur);
}
}
return 1;
}
#define EXTERNAL_VAR_ENTRY_SIZE 44
int vos_read_alloc_external_vars(FILE * f, vos_program_module *header)
{
if (header->external_vars_map_len != header->n_external_vars * EXTERNAL_VAR_ENTRY_SIZE)
{
return 0;
}
uint8_t * buf = malloc(header->external_vars_map_len);
fseek(f, header->external_vars_map_address + 0x1000 - header->user_boundary, SEEK_SET);
if (fread(buf, 1, header->external_vars_map_len, f) != header->external_vars_map_len)
{
free(buf);
return 0;
}
uint8_t * cur = buf;
header->external_vars = malloc(sizeof(vos_external_var_entry) * header->n_external_vars);
for (int i = 0; i < header->n_external_vars; i++)
{
string(&cur, header->external_vars[i].name);
header->external_vars[i].address = big32(&cur);
for (int j = 0; j < 3; j++)
{
header->external_vars[i].unknown[j] = big16(&cur);
}
}
return 1;
}
void vos_header_cleanup(vos_program_module *header)
{
free(header->module_map_entries);
free(header->external_vars);
}
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