/* dlditool - Dynamically Linked Disk Interface patch tool Copyright (C) 2006 Michael Chisholm (Chishm) Send all queries to chishm@hotmail.com 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 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. * v1.24d - 2010-06-14 - zeromus * Modified for inclusion in desmume * v1.24 - 2007-08-02 - SmileyDude * Now using EXIT_SUCCESS and EXIT_FAILURE at the suggestion of MachinShin. * Defined EXIT_NO_DLDI_SECTION for when there is no DLDI section in a file. * Added cast to strcmp() call to appease the compiler. * v1.23 - 2007-01-23 - Chishm * Fixed bug when DLDI section doesn't exist * addr_t is now a signed int * v1.22 - 2007-01-12 - WinterMute * add search paths for dldi files * v1.21 - 2007-01-12 - Chishm * Improved error messages * v1.20 - 2007-01-11 - Chishm * Changed offset calculation method * v1.10 - 2007-01-07 - Chishm * Removed assumptions about endianess of computer * Word size shouldn't matter now either, except that an int type must be at least 32 bits long * Added *.sc.nds and *.gba.nds file extensions * Improved command line argument parsing * v1.01 - 2006-12-30 - Chishm * Minor bugfix parsing 3 arguments * v1.00 - 2006-12-25 - Chishm * Original release */ //#define VERSION "v1.24" #include #include #include #include #include #include #include "pstdint.h" #ifndef _MSC_VER # include # include #else #define MAXPATHLEN 1024 #endif #include namespace DLDI { typedef int32_t addr_t; typedef unsigned char data_t; #define FEATURE_MEDIUM_CANREAD 0x00000001 #define FEATURE_MEDIUM_CANWRITE 0x00000002 #define FEATURE_SLOT_GBA 0x00000010 #define FEATURE_SLOT_NDS 0x00000020 #define MAGIC_TOKEN 0xBF8DA5ED #define FIX_ALL 0x01 #define FIX_GLUE 0x02 #define FIX_GOT 0x04 #define FIX_BSS 0x08 #define DLDI_VERSION 1 #define EXIT_NO_DLDI_SECTION 2 enum DldiOffsets { DO_magicString = 0x00, // "\xED\xA5\x8D\xBF Chishm" DO_magicToken = 0x00, // 0xBF8DA5ED DO_magicShortString = 0x04, // " Chishm" DO_version = 0x0C, DO_driverSize = 0x0D, DO_fixSections = 0x0E, DO_allocatedSpace = 0x0F, DO_friendlyName = 0x10, DO_text_start = 0x40, // Data start DO_data_end = 0x44, // Data end DO_glue_start = 0x48, // Interworking glue start -- Needs address fixing DO_glue_end = 0x4C, // Interworking glue end DO_got_start = 0x50, // GOT start -- Needs address fixing DO_got_end = 0x54, // GOT end DO_bss_start = 0x58, // bss start -- Needs setting to zero DO_bss_end = 0x5C, // bss end // IO_INTERFACE data DO_ioType = 0x60, DO_features = 0x64, DO_startup = 0x68, DO_isInserted = 0x6C, DO_readSectors = 0x70, DO_writeSectors = 0x74, DO_clearStatus = 0x78, DO_shutdown = 0x7C, DO_code = 0x80 }; const data_t dldiMagicString[] = "\xED\xA5\x8D\xBF Chishm"; const char dldiFileExtension[] = ".dldi"; addr_t readAddr(data_t *mem, addr_t offset) { return static_cast(mem[offset + 0] | (mem[offset + 1] << 8) | (mem[offset + 2] << 16) | (mem[offset + 3] << 24)); } void writeAddr(data_t *mem, addr_t offset, addr_t value) { mem[offset + 0] = static_cast(value); mem[offset + 1] = static_cast(value >> 8); mem[offset + 2] = static_cast(value >> 16); mem[offset + 3] = static_cast(value >> 24); } int stringCaseInsensitiveCompare(const char *str1, const char *str2) { while (tolower(*str1) == tolower(*str2)) { if (!*str1) return 0; ++str1; ++str2; } return tolower(*str1) - tolower(*str2); } bool stringEndsWith(const char *str, const char *end) { if (strlen(str) < strlen(end)) return false; const char *strEnd = &str[strlen (str) - strlen(end)]; return !stringCaseInsensitiveCompare(strEnd, end); } bool stringStartsWith(const char *str, const char *start) { return strstr(str, start) == str; } addr_t quickFind(const data_t *data, const data_t *search, size_t dataLen, size_t searchLen) { const int32_t *dataChunk = reinterpret_cast(data); int searchChunk = reinterpret_cast(search)[0]; addr_t dataChunkEnd = static_cast(dataLen / sizeof(int32_t)); for (addr_t i = 0; i < dataChunkEnd; ++i) { if (dataChunk[i] == searchChunk) { if (i * sizeof(int32_t) + searchLen > dataLen) return -1; if (!memcmp(&data[i * sizeof(int32_t)], search, searchLen)) return i * sizeof(int32_t); } } return -1; } FILE *openDLDIFile(const char *argv0, char *dldiFileName ) { // add .dldi extension to filename if (!stringEndsWith(dldiFileName, dldiFileExtension)) strcat(dldiFileName, dldiFileExtension); printf("Trying \"%s\"\n", dldiFileName); // try opening from current directory FILE *dldiFile = fopen(dldiFileName, "rb"); if (dldiFile) return dldiFile; // check if the filename has a path component // check both slash varieties, win32 understands both // if we have a directory separator don't bother with search paths if (strstr(dldiFileName, "\\")) return nullptr; if (strstr(dldiFileName ,"/")) return nullptr; // check for DLDIPATH in environment char *dldiPATH = getenv("DLDIPATH"); char appPath[MAXPATHLEN]; if (dldiPATH) { strcpy(appPath, dldiPATH); if (appPath[strlen(appPath)] != '\\' && appPath[strlen(appPath)] != '/') strcat(appPath, "/"); strcat(appPath, dldiFileName); printf("Trying \"%s\"\n", appPath); dldiFile = fopen(appPath,"rb"); if (dldiFile) return dldiFile; } char *lastSlash = nullptr; char *ptr = const_cast(argv0); while (*(ptr++)) if (*ptr == '\\' || * ptr == '/') lastSlash = ptr; char appName[MAXPATHLEN]; char appPathName[MAXPATHLEN]; if (lastSlash) { *(lastSlash++) = '\0'; strcpy(appPath, argv0); strcpy(appName, lastSlash); strcat(appPath, "/"); } else { strcpy(appPath, ""); strcpy(appName, argv0); } // finally try in the application path // if argv0 contains a directory separator we have a path component if (!strstr(appPath,"\\") && !strstr(appPath,"/")) { // no path in argv0 so search system path char *sysPATH = getenv("PATH"); char *thisPATH = sysPATH; printf("Searching system path\n%s\n", sysPATH); while (1) { char *nextPATH = strstr(thisPATH, ":" ); // find next PATH separator if (nextPATH) *(nextPATH++) = '\0'; // terminate string, point to next component strcpy(appPath, thisPATH); strcat(appPath, "/"); strcpy(appPathName, appPath); strcat(appPathName, appName); // add application name struct stat buf; if (!stat(appPathName, &buf)) // if it exists we found the path break; thisPATH = nextPATH; strcpy(appPath, "");// empty path if (!thisPATH) break; } } strcat(appPath, "dldi/"); // add dldi folder strcat(appPath, dldiFileName); // add dldi filename to path printf("Trying \"%s\"\n", appPath); return fopen(appPath, "rb"); // no more places to check, just return this handle } // Source File: mpcf.dldi // Time: 6/14/2010 9:38 PM // Orig. Offset: 0 / 0x00000000 // Length: 1876 / 0x00000754 (bytes) data_t mpcf_dldi[] = { 0xED, 0xA5, 0x8D, 0xBF, 0x20, 0x43, 0x68, 0x69, 0x73, 0x68, 0x6D, 0x00, 0x01, 0x0B, 0x0C, 0x00, 0x47, 0x42, 0x41, 0x20, 0x4D, 0x6F, 0x76, 0x69, 0x65, 0x20, 0x50, 0x6C, 0x61, 0x79, 0x65, 0x72, 0x20, 0x28, 0x43, 0x6F, 0x6D, 0x70, 0x61, 0x63, 0x74, 0x20, 0x46, 0x6C, 0x61, 0x73, 0x68, 0x29, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xBF, 0x54, 0x07, 0x80, 0xBF, 0x98, 0x00, 0x80, 0xBF, 0x98, 0x00, 0x80, 0xBF, 0x50, 0x07, 0x80, 0xBF, 0x50, 0x07, 0x80, 0xBF, 0x54, 0x07, 0x80, 0xBF, 0x70, 0x07, 0x80, 0xBF, 0x4D, 0x50, 0x43, 0x46, 0x13, 0x00, 0x00, 0x00, 0x3C, 0x01, 0x80, 0xBF, 0x98, 0x01, 0x80, 0xBF, 0x78, 0x02, 0x80, 0xBF, 0xC8, 0x04, 0x80, 0xBF, 0xC8, 0x01, 0x80, 0xBF, 0x10, 0x07, 0x80, 0xBF, 0x0D, 0xC0, 0xA0, 0xE1, 0xF8, 0xDF, 0x2D, 0xE9, 0x04, 0xB0, 0x4C, 0xE2, 0x28, 0xD0, 0x4B, 0xE2, 0xF0, 0x6F, 0x9D, 0xE8, 0x1E, 0xFF, 0x2F, 0xE1, 0x10, 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0xD0, 0x4D, 0xE2, 0xAA, 0xFE, 0xFF, 0xEB, 0x04, 0xD0, 0x8D, 0xE2, 0x04, 0xE0, 0x9D, 0xE4, 0x1E, 0xFF, 0x2F, 0xE1, 0x0D, 0xC0, 0xA0, 0xE1, 0xF8, 0xDF, 0x2D, 0xE9, 0x04, 0xB0, 0x4C, 0xE2, 0x28, 0xD0, 0x4B, 0xE2, 0xF0, 0x6F, 0x9D, 0xE8, 0x1E, 0xFF, 0x2F, 0xE1, 0xDC, 0x00, 0x80, 0xBF, 0x98, 0x00, 0x80, 0xBF, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, }; //unsigned char mpcf_dldi[1876] bool tryPatch(void *data, size_t size) { // Find the DSDI reserved space in the file addr_t patchOffset = quickFind(static_cast(data), dldiMagicString, size, sizeof(dldiMagicString) / sizeof(char)); // no DLDI section if (patchOffset < 0) return false; data_t *pDH = mpcf_dldi; data_t *pAH = static_cast(data) + patchOffset; if (pDH[DO_driverSize] > pAH[DO_allocatedSpace]) { printf("Not enough space for patch. Available %d bytes, need %d bytes\n", 1 << pAH[DO_allocatedSpace], 1 << pDH[DO_driverSize]); return false; } if (memcmp(&pAH[DO_friendlyName], "Default (No interface)", 22)) { printf("Would have been a candidate for auto-patch DLDI, but there was already a patch installed."); return false; } //----should be able to patch OK----- addr_t memOffset; // Offset of DLDI after the file is loaded into memory addr_t relocationOffset; // Value added to all offsets within the patch to fix it properly addr_t ddmemOffset; // Original offset used in the DLDI file addr_t ddmemStart; // Start of range that offsets can be in the DLDI file addr_t ddmemEnd; // End of range that offsets can be in the DLDI file addr_t ddmemSize; // Size of range that offsets can be in the DLDI file addr_t addrIter; memOffset = readAddr(pAH, DO_text_start); if (!memOffset) memOffset = readAddr(pAH, DO_startup) - DO_code; ddmemOffset = readAddr(pDH, DO_text_start); relocationOffset = memOffset - ddmemOffset; printf("AUTO-PATCHING DLDI to MPCF! Lucky you!\n\n"); printf("Old driver: %s\n", &pAH[DO_friendlyName]); printf("New driver: %s\n", &pDH[DO_friendlyName]); printf("\n"); printf("Position in file: 0x%08X\n", patchOffset); printf("Position in memory: 0x%08X\n", memOffset); printf("Patch base address: 0x%08X\n", ddmemOffset); printf("Relocation offset: 0x%08X\n", relocationOffset); printf("\n"); ddmemStart = readAddr(pDH, DO_text_start); ddmemSize = 1 << pDH[DO_driverSize]; ddmemEnd = ddmemStart + ddmemSize; // Remember how much space is actually reserved pDH[DO_allocatedSpace] = pAH[DO_allocatedSpace]; // Copy the DLDI patch into the application memcpy(pAH, pDH, sizeof(mpcf_dldi)); // Fix the section pointers in the header writeAddr(pAH, DO_text_start, readAddr(pAH, DO_text_start) + relocationOffset); writeAddr(pAH, DO_data_end, readAddr(pAH, DO_data_end) + relocationOffset); writeAddr(pAH, DO_glue_start, readAddr(pAH, DO_glue_start) + relocationOffset); writeAddr(pAH, DO_glue_end, readAddr(pAH, DO_glue_end) + relocationOffset); writeAddr(pAH, DO_got_start, readAddr(pAH, DO_got_start) + relocationOffset); writeAddr(pAH, DO_got_end, readAddr(pAH, DO_got_end) + relocationOffset); writeAddr(pAH, DO_bss_start, readAddr(pAH, DO_bss_start) + relocationOffset); writeAddr(pAH, DO_bss_end, readAddr(pAH, DO_bss_end) + relocationOffset); // Fix the function pointers in the header writeAddr(pAH, DO_startup, readAddr(pAH, DO_startup) + relocationOffset); writeAddr(pAH, DO_isInserted, readAddr(pAH, DO_isInserted) + relocationOffset); writeAddr(pAH, DO_readSectors, readAddr(pAH, DO_readSectors) + relocationOffset); writeAddr(pAH, DO_writeSectors, readAddr(pAH, DO_writeSectors) + relocationOffset); writeAddr(pAH, DO_clearStatus, readAddr(pAH, DO_clearStatus) + relocationOffset); writeAddr(pAH, DO_shutdown, readAddr(pAH, DO_shutdown) + relocationOffset); if (pDH[DO_fixSections] & FIX_ALL) // Search through and fix pointers within the data section of the file for (addrIter = readAddr(pDH, DO_text_start) - ddmemStart; addrIter < readAddr(pDH, DO_data_end) - ddmemStart; ++addrIter) if (ddmemStart <= readAddr(pAH, addrIter) && readAddr(pAH, addrIter) < ddmemEnd) writeAddr(pAH, addrIter, readAddr(pAH, addrIter) + relocationOffset); if (pDH[DO_fixSections] & FIX_GLUE) // Search through and fix pointers within the glue section of the file for (addrIter = readAddr(pDH, DO_glue_start) - ddmemStart; addrIter < readAddr(pDH, DO_glue_end) - ddmemStart; ++addrIter) if (ddmemStart <= readAddr(pAH, addrIter) && readAddr(pAH, addrIter) < ddmemEnd) writeAddr(pAH, addrIter, readAddr(pAH, addrIter) + relocationOffset); if (pDH[DO_fixSections] & FIX_GOT) // Search through and fix pointers within the Global Offset Table section of the file for (addrIter = readAddr(pDH, DO_got_start) - ddmemStart; addrIter < readAddr(pDH, DO_got_end) - ddmemStart; ++addrIter) if (ddmemStart <= readAddr(pAH, addrIter) && readAddr(pAH, addrIter) < ddmemEnd) writeAddr(pAH, addrIter, readAddr(pAH, addrIter) + relocationOffset); if (pDH[DO_fixSections] & FIX_BSS) // Initialise the BSS to 0 memset(&pAH[readAddr(pDH, DO_bss_start) - ddmemStart] , 0, readAddr(pDH, DO_bss_end) - readAddr(pDH, DO_bss_start)); return true; } } //namespace DLDI