318 lines
11 KiB
C
318 lines
11 KiB
C
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/*
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"$Id: gbafix.c,v 1.2 2008-07-30 17:12:51 wntrmute Exp $"
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DevkitPro GBA ROM fix utility
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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Please report all bugs and problems through the bug tracker at
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"http://sourceforge.net/tracker/?group_id=114505&atid=668551".
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"$Header: /lvm/shared/ds/ds/cvs/devkitpro-cvsbackup/tools/gba/gbatools/gbafix.c,v 1.2 2008-07-30 17:12:51 wntrmute Exp $"
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*/
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//---------------------------------------------------------------------------------
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// gbafix.c
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//---------------------------------------------------------------------------------
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/*
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Gameboy Advance ROM fixer (by Dark Fader / BlackThunder / WinterMute / Sierraffinity)
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Validates header of GBA roms.
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History
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-------
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v1.07 - added support for ELF input, (PikalaxALT)
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v1.06 - added output silencing, (Sierraffinity)
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v1.05 - added debug offset argument, (Sierraffinity)
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v1.04 - converted to plain C, (WinterMute)
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v1.03 - header.fixed, header.device_type
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v1.02 - redefined the options (rgbfix style), checksum=0
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v1.01 - fix in parameters
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v1.00 - logo, complement
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*/
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#pragma pack(1)
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include "elf.h"
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#define VER "1.07"
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#define ARGV argv[arg]
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#define VALUE (ARGV+2)
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#define NUMBER strtoul(VALUE, NULL, 0)
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typedef struct
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{
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uint32_t start_code; // B instruction
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uint8_t logo[0xA0-0x04]; // logo data
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uint8_t title[0xC]; // game title name
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uint32_t game_code; //
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uint16_t maker_code; //
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uint8_t fixed; // 0x96
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uint8_t unit_code; // 0x00
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uint8_t device_type; // 0x00
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uint8_t unused[7]; //
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uint8_t game_version; // 0x00
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uint8_t complement; // 800000A0..800000BC
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uint16_t checksum; // 0x0000
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} Header;
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Header header;
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unsigned short checksum_without_header = 0;
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const Header good_header =
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{
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// start_code
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0xEA00002E,
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// logo
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{ 0x24,0xFF,0xAE,0x51,0x69,0x9A,0xA2,0x21,0x3D,0x84,0x82,0x0A,0x84,0xE4,0x09,0xAD,
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0x11,0x24,0x8B,0x98,0xC0,0x81,0x7F,0x21,0xA3,0x52,0xBE,0x19,0x93,0x09,0xCE,0x20,
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0x10,0x46,0x4A,0x4A,0xF8,0x27,0x31,0xEC,0x58,0xC7,0xE8,0x33,0x82,0xE3,0xCE,0xBF,
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0x85,0xF4,0xDF,0x94,0xCE,0x4B,0x09,0xC1,0x94,0x56,0x8A,0xC0,0x13,0x72,0xA7,0xFC,
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0x9F,0x84,0x4D,0x73,0xA3,0xCA,0x9A,0x61,0x58,0x97,0xA3,0x27,0xFC,0x03,0x98,0x76,
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0x23,0x1D,0xC7,0x61,0x03,0x04,0xAE,0x56,0xBF,0x38,0x84,0x00,0x40,0xA7,0x0E,0xFD,
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0xFF,0x52,0xFE,0x03,0x6F,0x95,0x30,0xF1,0x97,0xFB,0xC0,0x85,0x60,0xD6,0x80,0x25,
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0xA9,0x63,0xBE,0x03,0x01,0x4E,0x38,0xE2,0xF9,0xA2,0x34,0xFF,0xBB,0x3E,0x03,0x44,
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0x78,0x00,0x90,0xCB,0x88,0x11,0x3A,0x94,0x65,0xC0,0x7C,0x63,0x87,0xF0,0x3C,0xAF,
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0xD6,0x25,0xE4,0x8B,0x38,0x0A,0xAC,0x72,0x21,0xD4,0xF8,0x07 } ,
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// title
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{ 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
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// game code
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0x00000000,
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// maker code
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0x3130,
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// fixed
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0x96,
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// unit_code
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0x00,
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// device type
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0x00,
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// unused
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{ 0x00,0x00,0x00,0x00,0x00,0x00,0x00 },
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// game version
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0x00,
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// complement
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0x00,
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// checksum
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0x0000
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};
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//---------------------------------------------------------------------------------
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char HeaderComplement()
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/*---------------------------------------------------------------------------------
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Calculate Header complement check
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---------------------------------------------------------------------------------*/
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{
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int n;
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char c = 0;
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char *p = (char *)&header + 0xA0;
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for (n=0; n<0xBD-0xA0; n++)
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{
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c += *p++;
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}
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return -(0x19+c);
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}
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//---------------------------------------------------------------------------------
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int main(int argc, char *argv[])
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//---------------------------------------------------------------------------------
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{
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int arg;
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char *argfile = 0;
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FILE *infile;
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int silent = 0;
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int schedule_pad = 0;
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int size,bit;
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// show syntax
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if (argc <= 1)
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{
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printf("GBA ROM fixer v"VER" by Dark Fader / BlackThunder / WinterMute / Sierraffinity \n");
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printf("Syntax: gbafix <rom.gba> [-p] [-t[title]] [-c<game_code>] [-m<maker_code>] [-r<version>] [-d<debug>] [--silent]\n");
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printf("\n");
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printf("parameters:\n");
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printf(" -p Pad to next exact power of 2. No minimum size!\n");
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printf(" -t[<title>] Patch title. Stripped filename if none given.\n");
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printf(" -c<game_code> Patch game code (four characters)\n");
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printf(" -m<maker_code> Patch maker code (two characters)\n");
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printf(" -r<version> Patch game version (number)\n");
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printf(" -d<debug> Enable debugging handler and set debug entry point (0 or 1)\n");
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printf(" --silent Silence non-error output\n");
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return -1;
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}
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// get filename
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for (arg=1; arg<argc; arg++)
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{
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if (ARGV[0] != '-') { argfile=ARGV; }
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if (strncmp("--silent", &ARGV[0], 7) == 0) { silent = 1; }
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}
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// check filename
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if (!argfile)
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{
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fprintf(stderr, "Filename needed!\n");
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return -1;
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}
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uint32_t sh_offset = 0;
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// read file
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infile = fopen(argfile, "r+b");
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if (!infile) { fprintf(stderr, "Error opening input file!\n"); return -1; }
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fseek(infile, sh_offset, SEEK_SET);
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fread(&header, sizeof(header), 1, infile);
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// elf check
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Elf32_Shdr secHeader;
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if (memcmp(&header, ELFMAG, 4) == 0) {
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Elf32_Ehdr *elfHeader = (Elf32_Ehdr *)&header;
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fseek(infile, elfHeader->e_shoff, SEEK_SET);
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int i;
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for (i = 0; i < elfHeader->e_shnum; i++) {
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fread(&secHeader, sizeof(Elf32_Shdr), 1, infile);
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if (secHeader.sh_type == SHT_PROGBITS && secHeader.sh_addr == elfHeader->e_entry) break;
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}
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if (i == elfHeader->e_shnum) { fprintf(stderr, "Error finding entry point!\n"); return 1; }
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fseek(infile, secHeader.sh_offset, SEEK_SET);
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sh_offset = secHeader.sh_offset;
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fread(&header, sizeof(header), 1, infile);
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}
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// fix some data
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memcpy(header.logo, good_header.logo, sizeof(header.logo));
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memcpy(&header.fixed, &good_header.fixed, sizeof(header.fixed));
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memcpy(&header.device_type, &good_header.device_type, sizeof(header.device_type));
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// parse command line
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for (arg=1; arg<argc; arg++)
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{
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if (ARGV[0] == '-')
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{
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switch (ARGV[1])
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{
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case 'p': // pad
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{
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schedule_pad = 1;
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break;
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}
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case 't': // title
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{
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char title[256];
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memset(title, 0, sizeof(title));
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if (VALUE[0])
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{
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strncpy(title, VALUE, sizeof(header.title));
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}
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else
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{
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// use filename
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char s[256], *begin=s, *t; strcpy(s, argfile);
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t = strrchr(s, '\\'); if (t) begin = t+1;
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t = strrchr(s, '/'); if (t) begin = t+1;
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t = strrchr(s, '.'); if (t) *t = 0;
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strncpy(title, begin, sizeof(header.title));
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if (!silent) printf("%s\n",begin);
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}
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memcpy(header.title, title, sizeof(header.title)); // copy
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break;
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}
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case 'c': // game code
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{
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//if (!VALUE[0]) { fprintf(stderr, "Need value for %s\n", ARGV); break; }
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//header.game_code = NUMBER;
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header.game_code = VALUE[0] | VALUE[1]<<8 | VALUE[2]<<16 | VALUE[3]<<24;
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break;
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}
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case 'm': // maker code
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{
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//if (!VALUE[0]) { fprintf(stderr, "Need value for %s\n", ARGV); break; }
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//header.maker_code = (unsigned short)NUMBER;
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header.maker_code = VALUE[0] | VALUE[1]<<8;
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break;
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}
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case 'v': // ignored, compatability with other gbafix
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{
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break;
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}
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case 'r': // version
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{
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if (!VALUE[0]) { fprintf(stderr, "Need value for %s\n", ARGV); break; }
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header.game_version = (unsigned char)NUMBER;
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break;
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}
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case 'd': // debug
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{
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if (!VALUE[0]) { fprintf(stderr, "Need value for %s\n", ARGV); break; }
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header.logo[0x9C-0x04] = 0xA5; // debug enable
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header.device_type = (unsigned char)((NUMBER & 1) << 7); // debug handler entry point
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break;
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}
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case '-': // long arguments
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{
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if (strncmp("silent", &ARGV[2], 6) == 0) { continue; }
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break;
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}
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default:
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{
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printf("Invalid option: %s\n", ARGV);
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}
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}
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}
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}
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// update complement check & total checksum
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header.complement = 0;
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header.checksum = 0; // must be 0
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header.complement = HeaderComplement();
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//header.checksum = checksum_without_header + HeaderChecksum();
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if (schedule_pad) {
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if (sh_offset != 0) {
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fprintf(stderr, "Warning: Cannot safely pad an ELF\n");
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} else {
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fseek(infile, 0, SEEK_END);
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size = ftell(infile);
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for (bit=31; bit>=0; bit--) if (size & (1<<bit)) break;
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if (size != (1<<bit))
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{
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int todo = (1<<(bit+1)) - size;
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while (todo--) fputc(0xFF, infile);
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}
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}
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}
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fseek(infile, sh_offset, SEEK_SET);
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fwrite(&header, sizeof(header), 1, infile);
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fclose(infile);
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if (!silent) printf("ROM fixed!\n");
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return 0;
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}
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