diff options
Diffstat (limited to 'tools/gbafix/gbafix.c')
| -rw-r--r-- | tools/gbafix/gbafix.c | 317 |
1 files changed, 317 insertions, 0 deletions
diff --git a/tools/gbafix/gbafix.c b/tools/gbafix/gbafix.c new file mode 100644 index 0000000..9088cdc --- /dev/null +++ b/tools/gbafix/gbafix.c @@ -0,0 +1,317 @@ +/* + "$Id: gbafix.c,v 1.2 2008-07-30 17:12:51 wntrmute Exp $" + + DevkitPro GBA ROM fix utility + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + This library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with this library; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 + USA. + + Please report all bugs and problems through the bug tracker at + "http://sourceforge.net/tracker/?group_id=114505&atid=668551". + + "$Header: /lvm/shared/ds/ds/cvs/devkitpro-cvsbackup/tools/gba/gbatools/gbafix.c,v 1.2 2008-07-30 17:12:51 wntrmute Exp $" + +*/ +//--------------------------------------------------------------------------------- +// gbafix.c +//--------------------------------------------------------------------------------- +/* + Gameboy Advance ROM fixer (by Dark Fader / BlackThunder / WinterMute / Diegoisawesome) + Validates header of GBA roms. + + History + ------- + v1.07 - added support for ELF input, (PikalaxALT) + v1.06 - added output silencing, (Diegoisawesome) + v1.05 - added debug offset argument, (Diegoisawesome) + v1.04 - converted to plain C, (WinterMute) + v1.03 - header.fixed, header.device_type + v1.02 - redefined the options (rgbfix style), checksum=0 + v1.01 - fix in parameters + v1.00 - logo, complement +*/ + +#pragma pack(1) + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <stdint.h> +#include "elf.h" + +#define VER "1.07" +#define ARGV argv[arg] +#define VALUE (ARGV+2) +#define NUMBER strtoul(VALUE, NULL, 0) + +typedef struct +{ + uint32_t start_code; // B instruction + uint8_t logo[0xA0-0x04]; // logo data + uint8_t title[0xC]; // game title name + uint32_t game_code; // + uint16_t maker_code; // + uint8_t fixed; // 0x96 + uint8_t unit_code; // 0x00 + uint8_t device_type; // 0x00 + uint8_t unused[7]; // + uint8_t game_version; // 0x00 + uint8_t complement; // 800000A0..800000BC + uint16_t checksum; // 0x0000 +} Header; + + +Header header; + +unsigned short checksum_without_header = 0; + +const Header good_header = +{ + // start_code + 0xEA00002E, + // logo + { 0x24,0xFF,0xAE,0x51,0x69,0x9A,0xA2,0x21,0x3D,0x84,0x82,0x0A,0x84,0xE4,0x09,0xAD, + 0x11,0x24,0x8B,0x98,0xC0,0x81,0x7F,0x21,0xA3,0x52,0xBE,0x19,0x93,0x09,0xCE,0x20, + 0x10,0x46,0x4A,0x4A,0xF8,0x27,0x31,0xEC,0x58,0xC7,0xE8,0x33,0x82,0xE3,0xCE,0xBF, + 0x85,0xF4,0xDF,0x94,0xCE,0x4B,0x09,0xC1,0x94,0x56,0x8A,0xC0,0x13,0x72,0xA7,0xFC, + 0x9F,0x84,0x4D,0x73,0xA3,0xCA,0x9A,0x61,0x58,0x97,0xA3,0x27,0xFC,0x03,0x98,0x76, + 0x23,0x1D,0xC7,0x61,0x03,0x04,0xAE,0x56,0xBF,0x38,0x84,0x00,0x40,0xA7,0x0E,0xFD, + 0xFF,0x52,0xFE,0x03,0x6F,0x95,0x30,0xF1,0x97,0xFB,0xC0,0x85,0x60,0xD6,0x80,0x25, + 0xA9,0x63,0xBE,0x03,0x01,0x4E,0x38,0xE2,0xF9,0xA2,0x34,0xFF,0xBB,0x3E,0x03,0x44, + 0x78,0x00,0x90,0xCB,0x88,0x11,0x3A,0x94,0x65,0xC0,0x7C,0x63,0x87,0xF0,0x3C,0xAF, + 0xD6,0x25,0xE4,0x8B,0x38,0x0A,0xAC,0x72,0x21,0xD4,0xF8,0x07 } , + // title + { 0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, + // game code + 0x00000000, + // maker code + 0x3130, + // fixed + 0x96, + // unit_code + 0x00, + // device type + 0x00, + // unused + { 0x00,0x00,0x00,0x00,0x00,0x00,0x00 }, + // game version + 0x00, + // complement + 0x00, + // checksum + 0x0000 +}; + +//--------------------------------------------------------------------------------- +char HeaderComplement() +/*--------------------------------------------------------------------------------- + Calculate Header complement check +---------------------------------------------------------------------------------*/ +{ + int n; + char c = 0; + char *p = (char *)&header + 0xA0; + for (n=0; n<0xBD-0xA0; n++) + { + c += *p++; + } + return -(0x19+c); +} + + +//--------------------------------------------------------------------------------- +int main(int argc, char *argv[]) +//--------------------------------------------------------------------------------- +{ + int arg; + char *argfile = 0; + FILE *infile; + int silent = 0; + int schedule_pad = 0; + + int size,bit; + + // show syntax + if (argc <= 1) + { + printf("GBA ROM fixer v"VER" by Dark Fader / BlackThunder / WinterMute / Diegoisawesome \n"); + printf("Syntax: gbafix <rom.gba> [-p] [-t[title]] [-c<game_code>] [-m<maker_code>] [-r<version>] [-d<debug>] [--silent]\n"); + printf("\n"); + printf("parameters:\n"); + printf(" -p Pad to next exact power of 2. No minimum size!\n"); + printf(" -t[<title>] Patch title. Stripped filename if none given.\n"); + printf(" -c<game_code> Patch game code (four characters)\n"); + printf(" -m<maker_code> Patch maker code (two characters)\n"); + printf(" -r<version> Patch game version (number)\n"); + printf(" -d<debug> Enable debugging handler and set debug entry point (0 or 1)\n"); + printf(" --silent Silence non-error output\n"); + return -1; + } + + // get filename + for (arg=1; arg<argc; arg++) + { + if (ARGV[0] != '-') { argfile=ARGV; } + if (strncmp("--silent", &ARGV[0], 7) == 0) { silent = 1; } + } + + // check filename + if (!argfile) + { + fprintf(stderr, "Filename needed!\n"); + return -1; + } + + uint32_t sh_offset = 0; + + // read file + infile = fopen(argfile, "r+b"); + if (!infile) { fprintf(stderr, "Error opening input file!\n"); return -1; } + fseek(infile, sh_offset, SEEK_SET); + fread(&header, sizeof(header), 1, infile); + + // elf check + Elf32_Shdr secHeader; + if (memcmp(&header, ELFMAG, 4) == 0) { + Elf32_Ehdr *elfHeader = (Elf32_Ehdr *)&header; + fseek(infile, elfHeader->e_shoff, SEEK_SET); + int i; + for (i = 0; i < elfHeader->e_shnum; i++) { + fread(&secHeader, sizeof(Elf32_Shdr), 1, infile); + if (secHeader.sh_type == SHT_PROGBITS && secHeader.sh_addr == elfHeader->e_entry) break; + } + if (i == elfHeader->e_shnum) { fprintf(stderr, "Error finding entry point!\n"); return 1; } + fseek(infile, secHeader.sh_offset, SEEK_SET); + sh_offset = secHeader.sh_offset; + fread(&header, sizeof(header), 1, infile); + } + + // fix some data + memcpy(header.logo, good_header.logo, sizeof(header.logo)); + memcpy(&header.fixed, &good_header.fixed, sizeof(header.fixed)); + memcpy(&header.device_type, &good_header.device_type, sizeof(header.device_type)); + + // parse command line + for (arg=1; arg<argc; arg++) + { + if ((ARGV[0] == '-')) + { + switch (ARGV[1]) + { + case 'p': // pad + { + schedule_pad = 1; + break; + } + + case 't': // title + { + char title[256]; + memset(title, 0, sizeof(title)); + if (VALUE[0]) + { + strncpy(title, VALUE, sizeof(header.title)); + } + else + { + // use filename + char s[256], *begin=s, *t; strcpy(s, argfile); + t = strrchr(s, '\\'); if (t) begin = t+1; + t = strrchr(s, '/'); if (t) begin = t+1; + t = strrchr(s, '.'); if (t) *t = 0; + strncpy(title, begin, sizeof(header.title)); + if (!silent) printf("%s\n",begin); + } + memcpy(header.title, title, sizeof(header.title)); // copy + break; + } + + case 'c': // game code + { + //if (!VALUE[0]) { fprintf(stderr, "Need value for %s\n", ARGV); break; } + //header.game_code = NUMBER; + header.game_code = VALUE[0] | VALUE[1]<<8 | VALUE[2]<<16 | VALUE[3]<<24; + break; + } + + case 'm': // maker code + { + //if (!VALUE[0]) { fprintf(stderr, "Need value for %s\n", ARGV); break; } + //header.maker_code = (unsigned short)NUMBER; + header.maker_code = VALUE[0] | VALUE[1]<<8; + break; + } + + case 'v': // ignored, compatability with other gbafix + { + break; + } + + case 'r': // version + { + if (!VALUE[0]) { fprintf(stderr, "Need value for %s\n", ARGV); break; } + header.game_version = (unsigned char)NUMBER; + break; + } + + case 'd': // debug + { + if (!VALUE[0]) { fprintf(stderr, "Need value for %s\n", ARGV); break; } + header.logo[0x9C-0x04] = 0xA5; // debug enable + header.device_type = (unsigned char)((NUMBER & 1) << 7); // debug handler entry point + break; + } + case '-': // long arguments + { + if (strncmp("silent", &ARGV[2], 6) == 0) { continue; } + break; + } + default: + { + printf("Invalid option: %s\n", ARGV); + } + } + } + } + + // update complement check & total checksum + header.complement = 0; + header.checksum = 0; // must be 0 + header.complement = HeaderComplement(); + //header.checksum = checksum_without_header + HeaderChecksum(); + + if (schedule_pad) { + if (sh_offset != 0) { + fprintf(stderr, "Warning: Cannot safely pad an ELF\n"); + } else { + fseek(infile, 0, SEEK_END); + size = ftell(infile); + for (bit=31; bit>=0; bit--) if (size & (1<<bit)) break; + if (size != (1<<bit)) + { + int todo = (1<<(bit+1)) - size; + while (todo--) fputc(0xFF, infile); + } + } + } + + fseek(infile, sh_offset, SEEK_SET); + fwrite(&header, sizeof(header), 1, infile); + fclose(infile); + + if (!silent) printf("ROM fixed!\n"); + + return 0; +} |