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gcm.c
817 lines (737 loc) · 28.8 KB
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gcm.c
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#include <stdio.h>
#include <gccore.h> /*** Wrapper to include common libogc headers ***/
#include <ogcsys.h> /*** Needed for console support ***/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <malloc.h>
#include "dvd.h"
#include "elf.h"
#include "gcm.h"
#include "main.h"
#include "nkit.h"
#include "util.h"
#include "swiss.h"
#include "cheats.h"
#include "patcher.h"
#include "sidestep.h"
#include "devices/deviceHandler.h"
#include "gui/FrameBufferMagic.h"
#include "gui/IPLFontWrite.h"
#include "psoarchive/PRS.h"
#include "xxhash/xxhash.h"
#define FST_ENTRY_SIZE 12
// Parse disc header & read FST into a buffer
DiskHeader *get_gcm_header(file_handle *file) {
DiskHeader *diskHeader;
// Grab disc header
diskHeader=(DiskHeader*)memalign(32,sizeof(DiskHeader));
if(!diskHeader) return NULL;
if(devices[DEVICE_CUR] == &__device_dvd && file->fileAttrib == IS_DIR) {
if(DVD_Read(diskHeader, 0, sizeof(DiskHeader)) != sizeof(DiskHeader)) {
free(diskHeader);
return NULL;
}
}
else {
devices[DEVICE_CUR]->seekFile(file,0,DEVICE_HANDLER_SEEK_SET);
if(devices[DEVICE_CUR]->readFile(file,diskHeader,sizeof(DiskHeader)) != sizeof(DiskHeader)) {
free(diskHeader);
return NULL;
}
}
if(!valid_gcm_magic(diskHeader)) {
free(diskHeader);
return NULL;
}
return diskHeader;
}
char *get_fst(file_handle *file, u32 file_offset, u32 file_size) {
char *FST;
// Alloc and read FST
FST=(char*)memalign(32,file_size);
if(!FST) return NULL;
if(devices[DEVICE_CUR] == &__device_dvd && file->fileAttrib == IS_DIR) {
if(DVD_Read(FST, file_offset, file_size) != file_size) {
free(FST);
return NULL;
}
}
else {
devices[DEVICE_CUR]->seekFile(file,file_offset,DEVICE_HANDLER_SEEK_SET);
if(devices[DEVICE_CUR]->readFile(file,FST,file_size) != file_size) {
free(FST);
return NULL;
}
}
return FST;
}
// Populate the file_offset and file_size for searchFileName from the GCM FST
void get_fst_details(char *FST, char *searchFileName, u32 *file_offset, u32 *file_size) {
u32 filename_offset, entries, string_table_offset, offset, i;
char filename[256];
// number of entries and string table location
entries = *(unsigned int*)&FST[8];
string_table_offset=12*entries;
// go through every entry
for (i=1;i<entries;i++)
{
offset=i*0x0c;
if(FST[offset]==0) //skip directories
{
filename_offset=(unsigned int)FST[offset+1]*256*256+(unsigned int)FST[offset+2]*256+(unsigned int)FST[offset+3];
memset(filename,0,256);
strcpy(filename,&FST[string_table_offset+filename_offset]);
if(!strcasecmp(filename,searchFileName))
{
memcpy(file_offset,&FST[offset+4],4);
memcpy(file_size,&FST[offset+8],4);
return;
}
}
}
*file_offset = -1;
}
//Lets parse the entire game FST in search for the banner
void get_gcm_banner(file_handle *file, u32 *file_offset, u32 *file_size) {
DiskHeader *diskHeader = get_gcm_header(file);
if(!diskHeader) return;
char *FST = get_fst(file, diskHeader->FSTOffset, diskHeader->FSTSize);
if(!FST) return;
get_fst_details(FST, "opening.bnr", file_offset, file_size);
free(FST);
free(diskHeader);
}
// Add a file to our current filesToPatch based on fileName
void parse_gcm_add(file_handle *file, ExecutableFile *filesToPatch, int *numToPatch, char *fileName) {
DiskHeader *diskHeader = get_gcm_header(file);
if(!diskHeader) return;
char *FST = get_fst(file, diskHeader->FSTOffset, diskHeader->FSTSize);
if(!FST) return;
u32 file_offset, file_size;
get_fst_details(FST, fileName, &file_offset, &file_size);
free(FST);
free(diskHeader);
if(file_offset != -1) {
filesToPatch[*numToPatch].file = file;
filesToPatch[*numToPatch].offset = file_offset;
filesToPatch[*numToPatch].size = file_size;
filesToPatch[*numToPatch].type = endsWith(fileName,".prs") ? PATCH_OTHER_PRS:PATCH_OTHER;
memcpy(&filesToPatch[*numToPatch].name,fileName,64);
*numToPatch += 1;
}
}
bool valid_dol_file(file_handle *file, u32 file_offset, u32 file_size) {
bool valid = false;
if(file_size % 32 || file_size < DOLHDRLENGTH) {
return false;
}
DOLHEADER dolhdr;
devices[DEVICE_CUR]->seekFile(file, file_offset, DEVICE_HANDLER_SEEK_SET);
devices[DEVICE_CUR]->readFile(file, &dolhdr, DOLHDRLENGTH);
int i;
for(i = 0; i < MAXTEXTSECTION; i++) {
if(dolhdr.textOffset[i]) {
if(dolhdr.textOffset[i] % 32 || dolhdr.textOffset[i] < DOLHDRLENGTH || dolhdr.textOffset[i] + dolhdr.textLength[i] > file_size) {
return false;
}
if(dolhdr.textAddress[i] % 32 || dolhdr.textAddress[i] < 0x80003100 || dolhdr.textAddress[i] + dolhdr.textLength[i] > 0x81200000) {
return false;
}
if(dolhdr.entryPoint >= dolhdr.textAddress[i] && dolhdr.entryPoint < dolhdr.textAddress[i] + dolhdr.textLength[i]) {
valid = true;
}
}
}
for(i = 0; i < MAXDATASECTION; i++) {
if(dolhdr.dataOffset[i]) {
if(dolhdr.dataOffset[i] % 32 || dolhdr.dataOffset[i] < DOLHDRLENGTH || dolhdr.dataOffset[i] + dolhdr.dataLength[i] > file_size) {
return false;
}
if(dolhdr.dataAddress[i] % 32 || dolhdr.dataAddress[i] < 0x80003100 || dolhdr.dataAddress[i] + dolhdr.dataLength[i] > 0x81200000) {
return false;
}
}
}
if(dolhdr.bssLength) {
if(dolhdr.bssAddress % 32 || dolhdr.bssAddress < 0x80003100 || dolhdr.bssAddress + dolhdr.bssLength > 0x81200000) {
return false;
}
}
return valid;
}
u32 calc_elf_segments_size(file_handle *file, u32 file_offset, u32 *file_size) {
u32 size = 0;
Elf32_Ehdr *ehdr = calloc(1, sizeof(Elf32_Ehdr));
devices[DEVICE_CUR]->seekFile(file, file_offset, DEVICE_HANDLER_SEEK_SET);
devices[DEVICE_CUR]->readFile(file, ehdr, sizeof(Elf32_Ehdr));
if(!valid_elf_image(ehdr)) {
free(ehdr);
return size;
}
Elf32_Phdr *phdr = calloc(ehdr->e_phnum, sizeof(Elf32_Phdr));
devices[DEVICE_CUR]->seekFile(file, file_offset + ehdr->e_phoff, DEVICE_HANDLER_SEEK_SET);
devices[DEVICE_CUR]->readFile(file, phdr, ehdr->e_phnum * sizeof(Elf32_Phdr));
*file_size = ehdr->e_phoff + ehdr->e_phnum * sizeof(Elf32_Phdr);
int i;
for(i = 0; i < ehdr->e_phnum; i++) {
if(phdr[i].p_type == PT_LOAD) {
phdr[i].p_filesz = (phdr[i].p_filesz + 31) & ~31;
if(phdr[i].p_offset + phdr[i].p_filesz > *file_size) {
*file_size = phdr[i].p_offset + phdr[i].p_filesz;
}
size += phdr[i].p_filesz;
}
}
free(ehdr);
free(phdr);
return size;
}
// Returns the number of filesToPatch and fills out the filesToPatch array passed in (pre-allocated)
int parse_gcm(file_handle *file, file_handle *file2, ExecutableFile *filesToPatch) {
char filename[256];
int dolOffset = 0, dolSize = 0, numFiles = 0;
DiskHeader *diskHeader = get_gcm_header(file);
if(!diskHeader) return 0;
if(diskHeader->MaxFSTSize > GCMDisk.MaxFSTSize) {
GCMDisk.MaxFSTSize = diskHeader->MaxFSTSize;
}
// Patch the apploader too!
// Calc Apploader size
ApploaderHeader apploaderHeader;
devices[DEVICE_CUR]->seekFile(file,0x2440,DEVICE_HANDLER_SEEK_SET);
if(devices[DEVICE_CUR]->readFile(file,&apploaderHeader,sizeof(ApploaderHeader)) != sizeof(ApploaderHeader)) {
DrawPublish(DrawMessageBox(D_FAIL, "Failed to read Apploader Header"));
while(1);
}
filesToPatch[numFiles].file = file;
filesToPatch[numFiles].offset = 0x2440;
filesToPatch[numFiles].size = sizeof(ApploaderHeader) + ((apploaderHeader.size + 31) & ~31) + ((apploaderHeader.rebootSize + 31) & ~31);
filesToPatch[numFiles].type = PATCH_APPLOADER;
sprintf(filesToPatch[numFiles].name, "apploader.img");
numFiles++;
if(diskHeader->DOLOffset != 0) {
if(is_datel_disc(diskHeader)) {
filesToPatch[numFiles].file = file;
filesToPatch[numFiles].offset = diskHeader->DOLOffset;
filesToPatch[numFiles].size = 0x400000;
filesToPatch[numFiles].hash = get_gcm_boot_hash(diskHeader, file->meta);
filesToPatch[numFiles].type = PATCH_BIN;
filesToPatch[numFiles].fstOffset = diskHeader->FSTOffset;
filesToPatch[numFiles].fstSize = diskHeader->FSTSize;
sprintf(filesToPatch[numFiles].name, "default.bin");
numFiles++;
}
else {
// Multi-DOL games may re-load the main DOL, so make sure we patch it too.
// Calc size
DOLHEADER dolhdr;
devices[DEVICE_CUR]->seekFile(file,diskHeader->DOLOffset,DEVICE_HANDLER_SEEK_SET);
if(devices[DEVICE_CUR]->readFile(file,&dolhdr,DOLHDRLENGTH) != DOLHDRLENGTH) {
DrawPublish(DrawMessageBox(D_FAIL, "Failed to read Main DOL Header"));
while(1);
}
filesToPatch[numFiles].file = file;
filesToPatch[numFiles].offset = dolOffset = diskHeader->DOLOffset;
filesToPatch[numFiles].size = dolSize = DOLSize(&dolhdr);
filesToPatch[numFiles].hash = get_gcm_boot_hash(diskHeader, file->meta);
filesToPatch[numFiles].type = PATCH_DOL;
filesToPatch[numFiles].fstOffset = diskHeader->FSTOffset;
filesToPatch[numFiles].fstSize = diskHeader->FSTSize;
sprintf(filesToPatch[numFiles].name, "default.dol");
numFiles++;
}
}
char *FST = get_fst(file, diskHeader->FSTOffset, diskHeader->FSTSize);
if(!FST) return 0;
u32 entries=*(unsigned int*)&FST[8];
u32 string_table_offset=FST_ENTRY_SIZE*entries;
int i;
// go through every entry
for (i=1;i<entries;i++)
{
u32 offset=i*0x0c;
if(FST[offset]==0) //skip directories
{
u32 file_offset,size = 0;
u32 filename_offset=((*(unsigned int*)&FST[offset]) & 0x00FFFFFF);
memset(&filename[0],0,256);
memcpy(&filename[0],&FST[string_table_offset+filename_offset],255);
memcpy(&file_offset,&FST[offset+4],4);
memcpy(&size,&FST[offset+8],4);
if(endsWith(filename,".dol")) {
if(strcasecmp(filename,"ffe.dol")) {
// Some games contain a single "default.dol", these do not need
// pre-patching because they are what is actually pointed to by the apploader (and loaded by us)
if(dolOffset == file_offset || dolSize == size || !valid_dol_file(file, file_offset, size)) {
continue;
}
}
filesToPatch[numFiles].file = file;
filesToPatch[numFiles].offset = file_offset;
filesToPatch[numFiles].size = size;
filesToPatch[numFiles].type = PATCH_DOL;
filesToPatch[numFiles].fstOffset = diskHeader->FSTOffset;
filesToPatch[numFiles].fstSize = diskHeader->FSTSize;
memcpy(&filesToPatch[numFiles].name,&filename[0],64);
numFiles++;
}
if(!strcasecmp(filename,"switcher.prs")) {
filesToPatch[numFiles].file = file;
filesToPatch[numFiles].offset = file_offset;
filesToPatch[numFiles].size = size;
filesToPatch[numFiles].type = PATCH_DOL_PRS;
filesToPatch[numFiles].fstOffset = diskHeader->FSTOffset;
filesToPatch[numFiles].fstSize = diskHeader->FSTSize;
memcpy(&filesToPatch[numFiles].name,&filename[0],64);
numFiles++;
}
if(endsWith(filename,".elf")) {
if(strcasecmp(filename,"STUBRDVD.ELF")) {
if(dolSize == calc_elf_segments_size(file, file_offset, &size) + DOLHDRLENGTH) {
continue;
}
}
filesToPatch[numFiles].file = file;
filesToPatch[numFiles].offset = file_offset;
filesToPatch[numFiles].size = size;
filesToPatch[numFiles].type = PATCH_ELF;
filesToPatch[numFiles].fstOffset = diskHeader->FSTOffset;
filesToPatch[numFiles].fstSize = diskHeader->FSTSize;
memcpy(&filesToPatch[numFiles].name,&filename[0],64);
numFiles++;
}
if(!strcasecmp(filename,"appl2.img") || !strcasecmp(filename,"appl2D.img")) {
filesToPatch[numFiles].file = file;
filesToPatch[numFiles].offset = file_offset;
filesToPatch[numFiles].size = size;
filesToPatch[numFiles].type = PATCH_APPLOADER;
memcpy(&filesToPatch[numFiles].name,&filename[0],64);
numFiles++;
}
if(!strcasecmp(filename,"exec.img") || !strcasecmp(filename,"execD.img")) {
filesToPatch[numFiles].file = file;
filesToPatch[numFiles].offset = file_offset;
filesToPatch[numFiles].size = size;
filesToPatch[numFiles].type = PATCH_EXEC;
memcpy(&filesToPatch[numFiles].name,&filename[0],64);
numFiles++;
}
if(endsWith(filename,".tgc")) {
// Go through all the TGC's internal files
numFiles += parse_tgc(file, &filesToPatch[numFiles], file_offset, filename);
}
}
}
free(FST);
free(diskHeader);
if(file2) {
numFiles += parse_gcm(file2, NULL, &filesToPatch[numFiles]);
}
// This need to be last.
filesToPatch[numFiles].file = file;
filesToPatch[numFiles].offset = 0;
filesToPatch[numFiles].size = 0x2440;
filesToPatch[numFiles].type = PATCH_OTHER;
sprintf(filesToPatch[numFiles].name, "boot.bin");
numFiles++;
return numFiles;
}
// Adjust TGC FST entries in case we load a DOL from one directly
void adjust_tgc_fst(char* FST, u32 tgc_base, u32 fileAreaStart, u32 fakeAmount) {
u32 entries=*(unsigned int*)&FST[8];
int i;
// go through every entry
for (i=1;i<entries;i++)
{
u32 offset=i*0x0c;
if(FST[offset]==0) //skip directories
{
u32 file_offset = 0;
memcpy(&file_offset, &FST[offset+4], 4);
*(unsigned int*)&FST[offset+4] = (file_offset-fakeAmount) + (tgc_base+fileAreaStart);
}
}
}
int parse_tgc(file_handle *file, ExecutableFile *filesToPatch, u32 tgc_base, char* tgcname) {
char filename[256];
int numFiles = 0;
TGCHeader tgcHeader;
devices[DEVICE_CUR]->seekFile(file,tgc_base,DEVICE_HANDLER_SEEK_SET);
devices[DEVICE_CUR]->readFile(file,&tgcHeader,sizeof(TGCHeader));
if(tgcHeader.magic != TGC_MAGIC) return 0;
if(tgcHeader.fstMaxLength > GCMDisk.MaxFSTSize) {
GCMDisk.MaxFSTSize = tgcHeader.fstMaxLength;
}
if(tgcHeader.apploaderOffset != 0) {
ApploaderHeader apploaderHeader;
devices[DEVICE_CUR]->seekFile(file,tgc_base+tgcHeader.apploaderOffset,DEVICE_HANDLER_SEEK_SET);
devices[DEVICE_CUR]->readFile(file,&apploaderHeader,sizeof(ApploaderHeader));
filesToPatch[numFiles].file = file;
filesToPatch[numFiles].offset = tgc_base+tgcHeader.apploaderOffset;
filesToPatch[numFiles].size = sizeof(ApploaderHeader) + ((apploaderHeader.size + 31) & ~31) + ((apploaderHeader.rebootSize + 31) & ~31);
filesToPatch[numFiles].type = PATCH_APPLOADER;
sprintf(filesToPatch[numFiles].name, "%s/%s", tgcname, "apploader.img");
numFiles++;
}
filesToPatch[numFiles].file = file;
filesToPatch[numFiles].offset = tgc_base+tgcHeader.dolStart;
filesToPatch[numFiles].size = tgcHeader.dolLength;
filesToPatch[numFiles].type = PATCH_DOL;
filesToPatch[numFiles].fstOffset = tgc_base+tgcHeader.fstStart;
filesToPatch[numFiles].fstSize = tgcHeader.fstLength;
filesToPatch[numFiles].tgcBase = tgc_base+file->fileBase;
filesToPatch[numFiles].tgcFileStartArea = tgcHeader.userStart;
filesToPatch[numFiles].tgcFakeOffset = tgcHeader.gcmUserStart;
sprintf(filesToPatch[numFiles].name, "%s/%s", tgcname, "default.dol");
numFiles++;
// Alloc and read FST
char *FST = get_fst(file, tgc_base + tgcHeader.fstStart, tgcHeader.fstLength);
// Adjust TGC FST offsets
adjust_tgc_fst(FST, tgc_base, tgcHeader.userStart, tgcHeader.gcmUserStart);
u32 entries=*(unsigned int*)&FST[8];
u32 string_table_offset=FST_ENTRY_SIZE*entries;
int i;
// go through every entry
for (i=1;i<entries;i++)
{
u32 offset=i*0x0c;
if(FST[offset]==0) //skip directories
{
u32 file_offset,size = 0;
u32 filename_offset=((*(unsigned int*)&FST[offset]) & 0x00FFFFFF);
memset(&filename[0],0,256);
memcpy(&filename[0],&FST[string_table_offset+filename_offset],255);
memcpy(&file_offset,&FST[offset+4],4);
memcpy(&size,&FST[offset+8],4);
if(endsWith(filename,".dol")) {
if(tgcHeader.dolLength == size || !valid_dol_file(file, file_offset, size)) {
continue;
}
filesToPatch[numFiles].file = file;
filesToPatch[numFiles].offset = file_offset;
filesToPatch[numFiles].size = size;
filesToPatch[numFiles].type = PATCH_DOL;
filesToPatch[numFiles].fstOffset = tgc_base+tgcHeader.fstStart;
filesToPatch[numFiles].fstSize = tgcHeader.fstLength;
filesToPatch[numFiles].tgcBase = tgc_base+file->fileBase;
filesToPatch[numFiles].tgcFileStartArea = tgcHeader.userStart;
filesToPatch[numFiles].tgcFakeOffset = tgcHeader.gcmUserStart;
memcpy(&filesToPatch[numFiles].name,&filename[0],64);
numFiles++;
}
if(endsWith(filename,".elf")) {
if(tgcHeader.dolLength == calc_elf_segments_size(file, file_offset, &size) + DOLHDRLENGTH) {
continue;
}
filesToPatch[numFiles].file = file;
filesToPatch[numFiles].offset = file_offset;
filesToPatch[numFiles].size = size;
filesToPatch[numFiles].type = PATCH_ELF;
filesToPatch[numFiles].fstOffset = tgc_base+tgcHeader.fstStart;
filesToPatch[numFiles].fstSize = tgcHeader.fstLength;
filesToPatch[numFiles].tgcBase = tgc_base+file->fileBase;
filesToPatch[numFiles].tgcFileStartArea = tgcHeader.userStart;
filesToPatch[numFiles].tgcFakeOffset = tgcHeader.gcmUserStart;
memcpy(&filesToPatch[numFiles].name,&filename[0],64);
numFiles++;
}
if(!strcasecmp(filename,"appl2.img") || !strcasecmp(filename,"appl2D.img")) {
filesToPatch[numFiles].file = file;
filesToPatch[numFiles].offset = file_offset;
filesToPatch[numFiles].size = size;
filesToPatch[numFiles].type = PATCH_APPLOADER;
memcpy(&filesToPatch[numFiles].name,&filename[0],64);
numFiles++;
}
if(!strcasecmp(filename,"exec.img") || !strcasecmp(filename,"execD.img")) {
filesToPatch[numFiles].file = file;
filesToPatch[numFiles].offset = file_offset;
filesToPatch[numFiles].size = size;
filesToPatch[numFiles].type = PATCH_EXEC;
memcpy(&filesToPatch[numFiles].name,&filename[0],64);
numFiles++;
}
}
}
free(FST);
return numFiles;
}
int patch_gcm(ExecutableFile *filesToPatch, int numToPatch) {
int i, num_patched = 0;
// If the current device isn't SD via EXI, init one slot to write patches.
// TODO expand this to support IDE-EXI and other writable devices (requires dvd patch re-write/modularity)
bool patchDeviceReady = false;
if(devices[DEVICE_CUR]->features & FEAT_PATCHES) {
if(devices[DEVICE_CUR] == &__device_gcloader && (devices[DEVICE_CONFIG] == &__device_sd_a || devices[DEVICE_CONFIG] == &__device_sd_b || devices[DEVICE_CONFIG] == &__device_sd_c)) {
devices[DEVICE_PATCHES] = devices[DEVICE_CONFIG];
}
else {
devices[DEVICE_PATCHES] = devices[DEVICE_CUR];
patchDeviceReady = true;
}
}
else {
if(devices[DEVICE_CONFIG] == &__device_sd_a || devices[DEVICE_CONFIG] == &__device_sd_b || devices[DEVICE_CONFIG] == &__device_sd_c) {
devices[DEVICE_PATCHES] = devices[DEVICE_CONFIG];
}
else if(deviceHandler_getDeviceAvailable(&__device_sd_c)) {
devices[DEVICE_PATCHES] = &__device_sd_c;
}
else if(deviceHandler_getDeviceAvailable(&__device_sd_b)) {
devices[DEVICE_PATCHES] = &__device_sd_b;
}
else if(deviceHandler_getDeviceAvailable(&__device_sd_a)) {
devices[DEVICE_PATCHES] = &__device_sd_a;
}
else {
devices[DEVICE_PATCHES] = NULL;
}
}
if(devices[DEVICE_PATCHES] == NULL) {
if(numToPatch > 0) {
uiDrawObj_t *msgBox = DrawPublish(DrawMessageBox(D_FAIL, "No writable device available.\nAn SD Card Adapter is necessary in order\nfor patches to survive application restart."));
sleep(5);
DrawDispose(msgBox);
}
return 0;
}
char* gameID = (char*)&GCMDisk;
// Go through all the possible files we think need patching..
for(i = 0; i < numToPatch; i++) {
ExecutableFile *fileToPatch = &filesToPatch[i];
sprintf(txtbuffer, "Patching File %i/%i\n%s [%iKB]",i+1,numToPatch,fileToPatch->name,fileToPatch->size/1024);
if(fileToPatch->size > 8*1024*1024) {
print_gecko("Skipping %s %iKB too large\r\n", fileToPatch->name, fileToPatch->size/1024);
continue;
}
print_gecko("Checking %s %iKb\r\n", fileToPatch->name, fileToPatch->size/1024);
if(!strcasecmp(fileToPatch->name, "iwanagaD.dol") || !strcasecmp(fileToPatch->name, "switcherD.dol")) {
continue; // skip unused PSO files
}
uiDrawObj_t* progBox = DrawPublish(DrawProgressBar(true, 0, txtbuffer));
const char* message = NULL;
u32 sizeToRead = (fileToPatch->size + 31) & ~31;
void *buffer = memalign(32, sizeToRead);
devices[DEVICE_CUR]->seekFile(fileToPatch->file,fileToPatch->offset,DEVICE_HANDLER_SEEK_SET);
int ret = devices[DEVICE_CUR]->readFile(fileToPatch->file,buffer,sizeToRead);
print_gecko("Read from %08X Size %08X - Result: %08X\r\n", fileToPatch->offset, sizeToRead, ret);
if(ret != sizeToRead) {
message = "Failed to read file!";
goto fail;
}
fileToPatch->hash = XXH3_64bits(buffer, sizeToRead);
if(!valid_file_xxh3(&GCMDisk, fileToPatch)) {
message = "Failed integrity check!";
goto fail;
}
u8 *oldBuffer = NULL, *newBuffer = NULL;
if(fileToPatch->type == PATCH_DOL_PRS || fileToPatch->type == PATCH_OTHER_PRS) {
ret = pso_prs_decompress_buf(buffer, &newBuffer, fileToPatch->size);
if(ret < 0) {
message = "Failed to decompress file!";
goto fail;
}
sizeToRead = ret;
oldBuffer = buffer;
buffer = newBuffer;
}
int patched;
// Patch raw files for certain games
if(fileToPatch->type == PATCH_OTHER || fileToPatch->type == PATCH_OTHER_PRS) {
patched = Patch_GameSpecificFile(buffer, sizeToRead, gameID, fileToPatch->name);
}
else {
// Patch executable files
patched = Patch_ExecutableFile(&buffer, &sizeToRead, gameID, fileToPatch->type);
}
if(fileToPatch->type == PATCH_DOL_PRS || fileToPatch->type == PATCH_OTHER_PRS) {
ret = pso_prs_compress2(buffer, oldBuffer, sizeToRead, fileToPatch->size);
if(ret < 0) {
message = "Failed to recompress file!";
free(oldBuffer);
goto fail;
}
fileToPatch->size = ret;
sizeToRead = (fileToPatch->size + 31) & ~31;
buffer = oldBuffer;
oldBuffer = NULL;
free(newBuffer);
newBuffer = NULL;
}
// Make patch trailer
XXH128_hash_t old_hash, new_hash = XXH3_128bits(buffer, sizeToRead);
if(patched) {
if(!patchDeviceReady) {
deviceHandler_setStatEnabled(0);
if(devices[DEVICE_PATCHES]->init(devices[DEVICE_PATCHES]->initial)) {
deviceHandler_setStatEnabled(1);
free(buffer);
DrawDispose(progBox);
uiDrawObj_t *msgBox = DrawPublish(DrawMessageBox(D_FAIL, "No writable device available.\nAn SD Card Adapter is necessary in order\nfor patches to survive application restart."));
sleep(5);
DrawDispose(msgBox);
return 0;
}
deviceHandler_setStatEnabled(1);
patchDeviceReady = true;
}
// Make /swiss/, it'll likely exist already anyway.
ensure_path(DEVICE_PATCHES, "swiss", NULL);
// If the old directory exists, lets move it to the new location (swiss_patches is now just patches under /swiss/)
ensure_path(DEVICE_PATCHES, "swiss/patches", "swiss_patches"); // TODO kill this off in our next major release.
ensure_path(DEVICE_PATCHES, "swiss/patches/game", NULL);
// File handle for a patch we might need to write
fileToPatch->patchFile = calloc(1, sizeof(file_handle));
if(devices[DEVICE_PATCHES] == &__device_fsp)
concatf_path(fileToPatch->patchFile->name, devices[DEVICE_PATCHES]->initial->name, "swiss/patches/game/%016llx%016llx.bin", new_hash.high64, new_hash.low64);
else
concatf_path(fileToPatch->patchFile->name, devices[DEVICE_PATCHES]->initial->name, "swiss/patches/game/%08x.bin", (u32)fileToPatch->hash);
// See if this file already exists, if it does, match hash
if(!devices[DEVICE_PATCHES]->readFile(fileToPatch->patchFile, NULL, 0)) {
if(devices[DEVICE_PATCHES]->seekFile(fileToPatch->patchFile, -sizeof(old_hash), DEVICE_HANDLER_SEEK_END) == sizeToRead &&
devices[DEVICE_PATCHES]->readFile(fileToPatch->patchFile, &old_hash, sizeof(old_hash)) == sizeof(old_hash) &&
XXH128_isEqual(old_hash, new_hash)) {
print_gecko("Hash matched, no need to patch again\r\n");
num_patched++;
free(buffer);
DrawDispose(progBox);
continue;
}
else {
devices[DEVICE_PATCHES]->deleteFile(fileToPatch->patchFile);
print_gecko("Hash mismatch, writing patch again\r\n");
}
}
// Otherwise, write a file out for this game with the patched buffer inside.
print_gecko("Writing patch file: %s %i bytes (disc offset %08X)\r\n", fileToPatch->patchFile->name, fileToPatch->size, fileToPatch->offset);
devices[DEVICE_PATCHES]->seekFile(fileToPatch->patchFile, 0, DEVICE_HANDLER_SEEK_SET);
if(devices[DEVICE_PATCHES]->writeFile(fileToPatch->patchFile, buffer, sizeToRead) == sizeToRead &&
devices[DEVICE_PATCHES]->writeFile(fileToPatch->patchFile, &new_hash, sizeof(new_hash)) == sizeof(new_hash) &&
!devices[DEVICE_PATCHES]->closeFile(fileToPatch->patchFile)) {
num_patched++;
}
else {
devices[DEVICE_PATCHES]->deleteFile(fileToPatch->patchFile);
message = "Failed to write file!";
goto fail;
}
}
fail:
free(buffer);
DrawDispose(progBox);
if(message) {
uiDrawObj_t *msgBox = DrawPublish(DrawMessageBox(D_FAIL, message));
sleep(2);
DrawDispose(msgBox);
}
}
return num_patched;
}
u64 calc_fst_entries_size(char *FST) {
u64 totalSize = 0LL;
u32 entries=*(unsigned int*)&FST[8];
int i;
for (i=1;i<entries;i++) // go through every entry
{
if(!FST[i*0x0c]) { // Skip directories
totalSize += *(u32*)&FST[(i*0x0c)+8];
}
}
return totalSize;
}
// Returns the number of filesToPatch and fills out the filesToPatch array passed in (pre-allocated)
int read_fst(file_handle *file, file_handle** dir, u64 *usedSpace) {
print_gecko("Read dir for directory: %s\r\n",file->name);
char filename[PATHNAME_MAX];
int numFiles = 1, idx = 0;
int isRoot = file->fileBase == 0;
DiskHeader *diskHeader = get_gcm_header(file);
if(!diskHeader) return -1;
char *FST = get_fst(file, diskHeader->FSTOffset, diskHeader->FSTSize);
if(!FST) return -1;
// Get the space taken up by this disc
if(usedSpace) *usedSpace = calc_fst_entries_size(FST);
if(isRoot) {
// Add the disc itself as a "file"
*dir = calloc(numFiles, sizeof(file_handle));
concatf_path((*dir)[idx].name, file->name, "%.64s.gcm", diskHeader->GameName);
(*dir)[idx].fileBase = 0;
(*dir)[idx].offset = 0;
(*dir)[idx].size = DISC_SIZE;
(*dir)[idx].fileAttrib = IS_FILE;
(*dir)[idx].meta = 0;
idx++;
}
u32 entries=*(unsigned int*)&FST[8];
u32 string_table_offset=FST_ENTRY_SIZE*entries;
int i;
// Go through the FST and find our DIR (or ROOT)
int parent_dir_offset = (u32)file->fileBase;
int dir_end_offset = isRoot ? *(u32*)&FST[8] : 0;
u32 filename_offset=((*(u32*)&FST[parent_dir_offset*0x0C]) & 0x00FFFFFF);
concat_path(filename, file->name, &FST[string_table_offset+filename_offset]);
dir_end_offset = *(u32*)&FST[(parent_dir_offset*0x0C) + 8];
if(!isRoot) {
// Add a special ".." dir which will take us back up a dir
*dir = calloc(numFiles, sizeof(file_handle));
concat_path((*dir)[idx].name, file->name, "..");
(*dir)[idx].fileBase = *(u32*)&FST[(parent_dir_offset*0x0C)+4];
(*dir)[idx].offset = 0;
(*dir)[idx].size = 0;
(*dir)[idx].fileAttrib = IS_SPECIAL;
(*dir)[idx].meta = 0;
idx++;
}
//print_gecko("Found DIR [%03i]:%s\r\n",parent_dir_offset,isRoot ? "ROOT":filename);
// Traverse the FST now adding all the files which come under our DIR
for (i=parent_dir_offset;i<dir_end_offset;i++) {
if(i==0) continue;
u32 offset=i*0x0c;
u32 file_offset,size = 0;
u32 filename_offset=((*(unsigned int*)&FST[offset]) & 0x00FFFFFF);
concat_path(filename, file->name, &FST[string_table_offset+filename_offset]);
memcpy(&file_offset,&FST[offset+4],4);
memcpy(&size,&FST[offset+8],4);
// Is this a sub dir of our dir?
if(FST[offset]) {
if(file_offset == parent_dir_offset) {
//print_gecko("Adding: [%03i]%s:%s offset %08X length %08X\r\n",i,!FST[offset] ? "File" : "Dir",filename,file_offset,size);
if(idx == numFiles){
++numFiles;
*dir = reallocarray(*dir, numFiles, sizeof(file_handle));
}
memset(&(*dir)[idx], 0, sizeof(file_handle));
strcpy((*dir)[idx].name, filename);
(*dir)[idx].fileBase = i;
(*dir)[idx].offset = 0;
(*dir)[idx].size = size;
(*dir)[idx].fileAttrib = IS_DIR;
(*dir)[idx].meta = 0;
idx++;
// Skip the entries that sit in this dir
i = size-1;
}
}
else {
// File, add it.
//print_gecko("Adding: [%03i]%s:%s offset %08X length %08X\r\n",i,!FST[offset] ? "File" : "Dir",filename,file_offset,size);
if(idx == numFiles){
++numFiles;
*dir = reallocarray(*dir, numFiles, sizeof(file_handle));
}
memset(&(*dir)[idx], 0, sizeof(file_handle));
strcpy((*dir)[idx].name, filename);
(*dir)[idx].fileBase = file_offset;
(*dir)[idx].offset = 0;
(*dir)[idx].size = size;
(*dir)[idx].fileAttrib = IS_FILE;
(*dir)[idx].meta = 0;
idx++;
}
}
free(FST);
free(diskHeader);
return numFiles;
}