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rockbox/utils/imxtools/sbtools/elftosb1.c
Amaury Pouly 1e2e79d668 imxtools/sbtools: introduce elftosb1 for stmp36xx 
The tool still lacks some feature of the proprietary one but
can create files with all the basic features.

Change-Id: Ib0c91210940ca829291ce70945f88dc510a49974
2012-12-16 21:28:41 +01:00

543 lines
13 KiB
C
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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2012 Amaury Pouly
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#define _ISOC99_SOURCE
#define _POSIX_C_SOURCE 200809L /* for strdup */
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
#include <stdarg.h>
#include <strings.h>
#include "crypto.h"
#include "elf.h"
#include "sb1.h"
#include "misc.h"
#define ROUND_UP(val, round) ((((val) + (round) - 1) / (round)) * (round))
/**
* Globals
*/
char *g_output_file;
bool g_critical;
bool g_final;
bool g_strict = true;
uint32_t g_jump_arg;
/**
* Helpers
*/
typedef char* (*get_next_arg_t)(void *user);
struct cmd_line_next_arg_user_t
{
int argc;
char **argv;
};
static char *cmd_line_next_arg(void *user)
{
struct cmd_line_next_arg_user_t *uu = user;
if(uu->argc == 0)
return NULL;
uu->argc--;
uu->argv++;
return *(uu->argv - 1);
}
static bool elf_read(void *user, uint32_t addr, void *buf, size_t count)
{
if(fseek((FILE *)user, addr, SEEK_SET) == -1)
return false;
return fread(buf, 1, count, (FILE *)user) == count;
}
static void elf_printf(void *user, bool error, const char *fmt, ...)
{
if(!g_debug && !error)
return;
(void) user;
va_list args;
va_start(args, fmt);
vprintf(fmt, args);
va_end(args);
}
static int sb1_add_inst(struct sb1_file_t *sb, struct sb1_inst_t *insts, int nr_insts)
{
sb->insts = augment_array(sb->insts, sizeof(struct sb1_inst_t), sb->nr_insts,
insts, nr_insts);
sb->nr_insts += nr_insts;
return 0;
}
static int sb1_add_load(struct sb1_file_t *sb, void *data, int size, uint32_t addr)
{
while(size > 0)
{
int len = MIN(size, SB1_CMD_MAX_LOAD_SIZE);
struct sb1_inst_t inst;
memset(&inst, 0, sizeof(inst));
inst.cmd = SB1_INST_LOAD;
inst.size = len;
inst.addr = addr;
inst.critical = g_critical;
inst.data = xmalloc(len);
memcpy(inst.data, data, len);
if(g_debug)
printf("Add instruction: load %#x bytes at %#x\n", len, addr);
int ret = sb1_add_inst(sb, &inst, 1);
if(ret < 0)
return ret;
data += len;
size -= len;
addr += len;
}
return 0;
}
static int sb1_add_switch(struct sb1_file_t *sb, uint32_t driver)
{
struct sb1_inst_t inst;
memset(&inst, 0, sizeof(inst));
inst.cmd = SB1_INST_MODE;
inst.critical = g_critical;
inst.mode = driver;
if(g_debug)
printf("Add instruction: switch driver to %#x\n", driver);
g_final = true;
return sb1_add_inst(sb, &inst, 1);
}
static int sb1_add_sdram(struct sb1_file_t *sb, uint32_t cs, uint32_t size)
{
struct sb1_inst_t inst;
memset(&inst, 0, sizeof(inst));
inst.cmd = SB1_INST_SDRAM;
inst.critical = g_critical;
inst.sdram.chip_select = cs;
inst.sdram.size_index = sb1_sdram_index_by_size(size);
if(sb1_sdram_index_by_size(size) < 0)
bug("Unknown SDRAM size: %d MB\n", size);
if(g_debug)
printf("Add instruction: init SDRAM (chip select=%d, size=%d MB)\n", cs, size);
return sb1_add_inst(sb, &inst, 1);
}
static int sb1_add_call(struct sb1_file_t *sb, uint32_t addr, uint32_t arg)
{
struct sb1_inst_t inst;
memset(&inst, 0, sizeof(inst));
inst.cmd = SB1_INST_CALL;
inst.critical = g_critical;
inst.addr = addr;
inst.argument = arg;
if(g_debug)
printf("Add instruction: call %#x with argument %#x\n", addr, arg);
return sb1_add_inst(sb, &inst, 1);
}
static int sb1_add_jump(struct sb1_file_t *sb, uint32_t addr, uint32_t arg)
{
struct sb1_inst_t inst;
memset(&inst, 0, sizeof(inst));
inst.cmd = SB1_INST_JUMP;
inst.critical = g_critical;
inst.addr = addr;
inst.argument = arg;
if(g_debug)
printf("Add instruction: jump %#x with argument %#x\n", addr, arg);
g_final = true;
return sb1_add_inst(sb, &inst, 1);
}
static int sb1_add_fill(struct sb1_file_t *sb, uint32_t pattern, uint32_t size, uint32_t addr)
{
while(size > 0)
{
int len = MIN(size, SB1_CMD_MAX_FILL_SIZE);
struct sb1_inst_t inst;
memset(&inst, 0, sizeof(inst));
inst.cmd = SB1_INST_FILL;
inst.critical = g_critical;
inst.size = len;
inst.addr = addr;
inst.pattern = pattern;
inst.datatype = SB1_DATATYPE_UINT32;
if(g_debug)
printf("Add instruction: fill %#x bytes with pattern %#x at address %#x\n",
size, pattern, addr);
int ret = sb1_add_inst(sb, &inst, 1);
if(ret < 0)
return ret;
size -= len;
addr += len;
}
return 0;
}
/**
* SB file modification
*/
static void generate_default_sb_version(struct sb1_version_t *ver)
{
ver->major = ver->minor = ver->revision = 0x9999;
}
static struct sb1_file_t *create_sb1_file(void)
{
struct sb1_file_t *sb = xmalloc(sizeof(struct sb1_file_t));
memset(sb, 0, sizeof(struct sb1_file_t));
/* default versions and key, apply_args() will overwrite if specified */
generate_default_sb_version(&sb->product_ver);
generate_default_sb_version(&sb->component_ver);
sb1_get_default_key(&sb->key);
return sb;
}
static void *load_file(const char *filename, int *size)
{
FILE *fd = fopen(filename, "rb");
if(fd == NULL)
bug("cannot open '%s' for reading\n", filename);
if(g_debug)
printf("Loading binary file '%s'...\n", filename);
fseek(fd, 0, SEEK_END);
*size = ftell(fd);
fseek(fd, 0, SEEK_SET);
void *data = xmalloc(*size);
fread(data, 1, *size, fd);
fclose(fd);
return data;
}
/**
* Command line parsing
*/
#define MAX_NR_ARGS 2
#define ARG_STR 0
#define ARG_UINT 1
#define CMD_FN(name) \
int name(struct sb1_file_t *sb, union cmd_arg_t args[MAX_NR_ARGS])
union cmd_arg_t
{
char *str;
unsigned long uint;
};
typedef int (*process_arg_t)(struct sb1_file_t *sb, union cmd_arg_t args[MAX_NR_ARGS]);
struct cmd_entry_t
{
const char *name;
int nr_args;
int arg_type[MAX_NR_ARGS];
process_arg_t fn;
};
/* Callbacks */
static void usage(void);
CMD_FN(cmd_help)
{
(void) args;
(void) sb;
usage();
return 0;
}
CMD_FN(cmd_debug)
{
(void) args;
(void) sb;
g_debug = true;
return 0;
}
CMD_FN(cmd_drive_tag)
{
sb->drive_tag = args[0].uint;
return 0;
}
CMD_FN(cmd_load_binary)
{
int size;
void *data = load_file(args[0].str, &size);
int ret = sb1_add_load(sb, data, size, args[1].uint);
free(data);
return ret;
}
CMD_FN(cmd_output)
{
(void) sb;
g_output_file = strdup(args[0].str);
return 0;
}
CMD_FN(cmd_switch)
{
return sb1_add_switch(sb, args[0].uint);
}
CMD_FN(cmd_sdram)
{
return sb1_add_sdram(sb, args[0].uint, args[1].uint);
}
CMD_FN(cmd_critical)
{
(void) sb;
(void) args;
g_critical = true;
return 0;
}
CMD_FN(cmd_clear_critical)
{
(void) sb;
(void) args;
g_critical = false;
return 0;
}
CMD_FN(cmd_strict)
{
(void) sb;
(void) args;
g_strict = true;
return 0;
}
CMD_FN(cmd_clear_strict)
{
(void) sb;
(void) args;
g_strict = false;
return 0;
}
CMD_FN(cmd_call)
{
/* FIXME: the proprietary sbtoelf always sets argument to 0 ?! */
return sb1_add_call(sb, args[0].uint, g_jump_arg);
}
CMD_FN(cmd_jumparg)
{
(void) sb;
g_jump_arg = args[0].uint;
return 0;
}
static int load_elf(struct sb1_file_t *sb, const char *filename, int act)
{
struct elf_params_t elf;
FILE *fd = fopen(filename, "rb");
if(fd == NULL)
bug("cannot open '%s'\n", filename);
if(g_debug)
printf("Loading elf file '%s'...\n", filename);
elf_init(&elf);
bool loaded = elf_read_file(&elf, elf_read, elf_printf, fd);
fclose(fd);
if(!loaded)
bug("error loading elf file '%s'\n", filename);
//elf_translate_addresses(&elf);
elf_sort_by_address(&elf);
struct elf_section_t *esec = elf.first_section;
while(esec)
{
if(esec->type == EST_LOAD)
sb1_add_load(sb, esec->section, esec->size, esec->addr);
else if(esec->type == EST_FILL)
sb1_add_fill(sb, esec->pattern, esec->size, esec->addr);
esec = esec->next;
}
int ret = 0;
if(act == SB1_INST_JUMP || act == SB1_INST_CALL)
{
if(!elf.has_start_addr)
bug("Cannot jump/call: '%s' has no start address!\n", filename);
if(act == SB1_INST_JUMP)
ret = sb1_add_jump(sb, elf.start_addr, g_jump_arg);
else
ret = sb1_add_call(sb, elf.start_addr, g_jump_arg);
}
elf_release(&elf);
return ret;
}
CMD_FN(cmd_load)
{
return load_elf(sb, args[0].str, SB1_INST_LOAD);
}
CMD_FN(cmd_loadjump)
{
return load_elf(sb, args[0].str, SB1_INST_JUMP);
}
CMD_FN(cmd_loadjumpreturn)
{
return load_elf(sb, args[0].str, SB1_INST_CALL);
}
#define CMD(name,fn,nr_args,...) {name,nr_args,{__VA_ARGS__},fn},
struct cmd_entry_t g_cmds[] =
{
CMD("-d", cmd_debug, 0)
CMD("-debugon", cmd_debug, 0)
CMD("-h", cmd_help, 0)
CMD("-?", cmd_help, 0)
CMD("-load-binary", cmd_load_binary, 2, ARG_STR, ARG_UINT)
CMD("-drive-tag", cmd_drive_tag, 1, ARG_UINT)
CMD("-o", cmd_output, 1, ARG_STR)
CMD("-w", cmd_switch, 1, ARG_UINT)
CMD("-switchdriver", cmd_switch, 1, ARG_UINT)
CMD("-sdram", cmd_sdram, 2, ARG_UINT, ARG_UINT)
CMD("-c", cmd_critical, 0)
CMD("-critical", cmd_critical, 0)
CMD("-C", cmd_clear_critical, 0)
CMD("-noncritical", cmd_clear_critical, 0)
CMD("-n", cmd_strict, 0)
CMD("-strict", cmd_strict, 0)
CMD("-N", cmd_clear_strict, 0)
CMD("-nonstrict", cmd_clear_strict, 0)
CMD("-call", cmd_call, 1, ARG_UINT)
CMD("-jumparg", cmd_jumparg, 1, ARG_UINT)
CMD("-f", cmd_load, 1, ARG_STR)
CMD("-load", cmd_load, 1, ARG_STR)
CMD("-r", cmd_loadjumpreturn, 1, ARG_STR)
CMD("-loadjumpreturn", cmd_loadjumpreturn, 1, ARG_STR)
CMD("-j", cmd_loadjump, 1, ARG_STR)
CMD("-loadjump", cmd_loadjump, 1, ARG_STR)
};
#undef CMD
#define NR_CMDS (int)(sizeof(g_cmds) / sizeof(g_cmds[0]))
static int apply_args(struct sb1_file_t *sb, get_next_arg_t next, void *user)
{
while(true)
{
/* next command ? */
char *cmd = next(user);
if(cmd == NULL)
break;
/* switch */
int i = 0;
while(i < NR_CMDS && strcmp(cmd, g_cmds[i].name) != 0)
i++;
if(i == NR_CMDS)
bug("Unknown option '%s'\n", cmd);
union cmd_arg_t args[MAX_NR_ARGS];
for(int j = 0; j < g_cmds[i].nr_args; j++)
{
args[j].str = next(user);
if(args[j].str == NULL)
bug("Option '%s' requires %d arguments, only %d given\n", cmd, g_cmds[i].nr_args, j);
if(g_cmds[i].arg_type[j] == ARG_UINT)
{
char *end;
args[j].uint = strtoul(args[j].str, &end, 0);
if(*end)
bug("Option '%s' expects an integer as argument %d\n", cmd, j + 1);
}
}
int ret = g_cmds[i].fn(sb, args);
if(ret < 0)
return ret;
}
return 0;
}
static void usage(void)
{
printf("Usage: elftosb1 [options]\n");
printf("Options:\n");
printf(" -h/-?/-help\t\t\tDisplay this message\n");
printf(" -o <file>\t\t\tSet output file\n");
printf(" -d/-debugon\t\t\tEnable debug output\n");
printf(" -k <file>\t\t\tSet key file\n");
printf(" -load-binary <file> <addr>\tLoad a binary file at a specified address\n");
printf(" -drive-tag <tag>\t\tSpecify drive tag\n");
printf(" -w/-switchdriver <driver>\tSwitch driver\n");
printf(" -sdram <chip select> <size>\tInit SDRAM\n");
printf(" -f/-load <file>\t\tLoad a ELF file\n");
exit(1);
}
int main(int argc, char **argv)
{
if(argc <= 1)
usage();
struct sb1_file_t *sb = create_sb1_file();
struct cmd_line_next_arg_user_t u;
u.argc = argc - 1;
u.argv = argv + 1;
int ret = apply_args(sb, &cmd_line_next_arg, &u);
if(ret < 0)
{
sb1_free(sb);
return ret;
}
if(!g_output_file)
bug("You must specify an output file\n");
if(!g_final)
{
if(g_strict)
bug("There is no final command in this command stream!\n");
else
printf("Warning: there is no final command in this command stream!\n");
}
enum sb1_error_t err = sb1_write_file(sb, g_output_file);
if(err != SB1_SUCCESS)
printf("Error: %d\n", err);
return ret;
}
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