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d64f221a92
WiiUPluginSystem/loader/src/plugin/PluginLoader.cpp
Maschell d64f221a92 [ALL] Added more fields to the metadata 
- Now the plugin it holds the build timestamp and a description
- Added descriptions for all plugins
2018-02-18 18:43:51 +01:00

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/* based on module.c
* by Alex Chadwick
*
* Copyright (C) 2014, Alex Chadwick
* Modified 2018, Maschell
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <string>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include "ElfTools.h"
#include "PluginData.h"
#include "PluginLoader.h"
#include "utils/StringTools.h"
#include "common/retain_vars.h"
PluginLoader * PluginLoader::instance = NULL;
std::vector<PluginInformation *> PluginLoader::getPluginInformation(const char * path){
std::vector<PluginInformation *> result;
struct dirent *dp;
DIR *dfd = NULL;
if(path == NULL){
DEBUG_FUNCTION_LINE("Path was NULL");
return result;
}
if ((dfd = opendir(path)) == NULL){
DEBUG_FUNCTION_LINE("Couldn't open dir %s",path);
return result;
}
while ((dp = readdir(dfd)) != NULL){
struct stat stbuf ;
std::string full_file_path = StringTools::strfmt("%s/%s",path,dp->d_name);
StringTools::RemoveDoubleSlashs(full_file_path);
if( stat(full_file_path.c_str(),&stbuf ) == -1 ){
DEBUG_FUNCTION_LINE("Unable to stat file: %s\n",full_file_path.c_str()) ;
continue;
}
if ( ( stbuf.st_mode & S_IFMT ) == S_IFDIR ){ // Skip directories
continue;
}else{
DEBUG_FUNCTION_LINE("Found file: %s\n",full_file_path.c_str()) ;
PluginInformation * plugin = PluginInformation::loadPluginInformation(full_file_path);
if(plugin != NULL){
DEBUG_FUNCTION_LINE("Found plugin %s by %s. Built on %s Size: %d kb \n",plugin->getName().c_str(),plugin->getAuthor().c_str(),plugin->getBuildTimestamp().c_str(),plugin->getSize()/1024) ;
DEBUG_FUNCTION_LINE("Description: %s \n",plugin->getDescription().c_str()) ;
result.push_back(plugin);
} else {
DEBUG_FUNCTION_LINE("%s is not a valid plugin\n",full_file_path.c_str()) ;
}
}
}
return result;
}
std::vector<PluginInformation *> PluginLoader::getPluginsLoadedInMemory(){
std::vector<PluginInformation *> pluginInformation;
for(s32 i = 0; i < gbl_replacement_data.number_used_plugins; i++){
replacement_data_plugin_t * pluginInfo = &gbl_replacement_data.plugin_data[i];
PluginInformation * curPlugin = PluginInformation::loadPluginInformation(pluginInfo->path);
if(curPlugin != NULL){
pluginInformation.push_back(curPlugin);
}
}
return pluginInformation;
}
void PluginLoader::loadAndLinkPlugins(std::vector<PluginInformation *> pluginInformation){
std::vector<PluginData *> loadedPlugins;
for(size_t i = 0;i < pluginInformation.size(); i++){
PluginInformation * cur_info = pluginInformation[i];
PluginData * pluginData = loadAndLinkPlugin(cur_info);
if(pluginData == NULL){
DEBUG_FUNCTION_LINE("loadAndLinkPlugins failed for %d\n",i) ;
continue;
} else {
loadedPlugins.push_back(pluginData);
}
}
copyPluginDataIntoGlobalStruct(loadedPlugins);
clearPluginData(loadedPlugins);
}
void PluginLoader::clearPluginData(std::vector<PluginData *> pluginData){
for(size_t i = 0;i < pluginData.size(); i++){
PluginData * curPluginData = pluginData[i];
if(curPluginData != NULL){
delete curPluginData;
}
}
}
void PluginLoader::clearPluginInformation(std::vector<PluginInformation *> pluginInformation){
for(size_t i = 0;i < pluginInformation.size(); i++){
PluginInformation * curPluginInformation = pluginInformation[i];
if(curPluginInformation != NULL){
delete curPluginInformation;
}
}
}
PluginData * PluginLoader::loadAndLinkPlugin(PluginInformation * pluginInformation){
PluginData * result = NULL;
int fd = -1;
Elf *elf = NULL;
if(pluginInformation == NULL){
DEBUG_FUNCTION_LINE("pluginInformation was NULL\n");
goto exit_error;
}
if(pluginInformation->getSize() > ((u32) this->getCurrentStoreAddress() - (u32) this->startAddress)){
DEBUG_FUNCTION_LINE("Not enough space left to loader the plugin into memory\n");
goto exit_error;
}
/* check for compile errors */
if (elf_version(EV_CURRENT) == EV_NONE){
goto exit_error;
}
fd = open(pluginInformation->getPath().c_str(), O_RDONLY, 0);
if (fd == -1){
DEBUG_FUNCTION_LINE("failed to open '%s' \n", pluginInformation->getPath().c_str());
goto exit_error;
}
elf = elf_begin(fd, ELF_C_READ, NULL);
if (elf == NULL){
DEBUG_FUNCTION_LINE("elf was NULL\n");
goto exit_error;
}
result = new PluginData(pluginInformation);
if(result == NULL){
DEBUG_FUNCTION_LINE("Failed to create object\n");
goto exit_error;
}
if(!this->loadAndLinkElf(result, elf, this->getCurrentStoreAddress())){
delete result;
result = NULL;
}
exit_error:
if (elf != NULL){
elf_end(elf);
}
if (fd != -1){
close(fd);
}
return result;
}
bool PluginLoader::loadAndLinkElf(PluginData * pluginData, Elf *elf, void * endAddress) {
if(pluginData == NULL || elf == NULL || endAddress == NULL){
return false;
}
DEBUG_FUNCTION_LINE("\n");
u32 curAddress = (u32) endAddress;
Elf_Scn *scn;
size_t symtab_count, section_count, shstrndx, symtab_strndx, entries_count, hooks_count;
Elf32_Sym *symtab = NULL;
uint8_t **destinations = NULL;
wups_loader_entry_t *entries = NULL;
wups_loader_hook_t *hooks = NULL;
bool result = false;
std::vector<wups_loader_entry_t *> entry_t_list;
std::vector<wups_loader_hook_t *> hook_t_list;
std::vector<EntryData *> entry_data_list;
std::vector<HookData *> hook_data_list;
if (!ElfTools::loadElfSymtab(elf, &symtab, &symtab_count, &symtab_strndx)){
goto exit_error;
}
if(symtab == NULL){
goto exit_error;
}
if (elf_getshdrnum(elf, &section_count) != 0){
goto exit_error;
}
if (elf_getshdrstrndx(elf, &shstrndx) != 0){
goto exit_error;
}
destinations = (uint8_t **) malloc(sizeof(uint8_t *) * section_count);
for (scn = elf_nextscn(elf, NULL); scn != NULL; scn = elf_nextscn(elf, scn)) {
Elf32_Shdr *shdr;
shdr = elf32_getshdr(scn);
if (shdr == NULL){
continue;
}
if ((shdr->sh_type == SHT_PROGBITS || shdr->sh_type == SHT_NOBITS) &&
(shdr->sh_flags & SHF_ALLOC)) {
const char *name;
destinations[elf_ndxscn(scn)] = NULL;
name = elf_strptr(elf, shstrndx, shdr->sh_name);
if (name == NULL){
continue;
}
if (strcmp(name, ".wups.meta") == 0) {
continue;
} else if (strcmp(name, ".wups.load") == 0) {
if (entries != NULL){
goto exit_error;
}
entries_count = shdr->sh_size / sizeof(wups_loader_entry_t);
entries = (wups_loader_entry_t *) malloc(sizeof(wups_loader_entry_t) * entries_count);
if (entries == NULL){
goto exit_error;
}
destinations[elf_ndxscn(scn)] = (uint8_t *)entries;
if (!ElfTools::elfLoadSection(elf, scn, shdr, entries)){
goto exit_error;
}
ElfTools::elfLoadSymbols(elf_ndxscn(scn), entries, symtab, symtab_count);
for(size_t i = 0;i< entries_count;i++){
entry_t_list.push_back(&entries[i]);
}
}else if (strcmp(name, ".wups.hooks") == 0) {
if (hooks != NULL){
goto exit_error;
}
hooks_count = shdr->sh_size / sizeof(wups_loader_hook_t);
hooks = (wups_loader_hook_t *) malloc(sizeof(wups_loader_hook_t) * hooks_count);
if (hooks == NULL){
goto exit_error;
}
destinations[elf_ndxscn(scn)] = (uint8_t *)hooks;
if (!ElfTools::elfLoadSection(elf, scn, shdr, hooks)){
goto exit_error;
}
ElfTools::elfLoadSymbols(elf_ndxscn(scn), hooks, symtab, symtab_count);
for(size_t i = 0;i< hooks_count;i++){
hook_t_list.push_back(&hooks[i]);
}
} else {
curAddress -= shdr->sh_size;
if (shdr->sh_addralign > 3){
curAddress = (u32)((int)curAddress & ~(shdr->sh_addralign - 1));
} else {
curAddress = (u32)((int)curAddress & ~3);
}
destinations[elf_ndxscn(scn)] = (uint8_t *) curAddress;
if((u32) curAddress < (u32) this->startAddress){
DEBUG_FUNCTION_LINE("Not enough space to load function %s into memory at %08X.\n",name,curAddress);
goto exit_error;
}
DEBUG_FUNCTION_LINE("Copy section %s to %08X\n",name,curAddress);
if (!ElfTools::elfLoadSection(elf, scn, shdr, (void*) curAddress)){
goto exit_error;
}
ElfTools::elfLoadSymbols(elf_ndxscn(scn), (void*) curAddress, symtab, symtab_count);
}
}
}
if (entries == NULL){
goto exit_error;
}
for (scn = elf_nextscn(elf, NULL); scn != NULL; scn = elf_nextscn(elf, scn)) {
Elf32_Shdr *shdr;
shdr = elf32_getshdr(scn);
if (shdr == NULL){
continue;
}
if ((shdr->sh_type == SHT_PROGBITS || shdr->sh_type == SHT_NOBITS) &&
(shdr->sh_flags & SHF_ALLOC) &&
destinations[elf_ndxscn(scn)] != NULL) {
if (!ElfTools::elfLink(elf, elf_ndxscn(scn), destinations[elf_ndxscn(scn)], symtab, symtab_count, symtab_strndx, true)){
goto exit_error;
}
}
}
for(size_t j=0;j<hook_t_list.size();j++){
wups_loader_hook_t * hook = hook_t_list[j];
DEBUG_FUNCTION_LINE("Saving hook of plugin \"%s\". Type: %08X, target: %08X\n",pluginData->getPluginInformation()->getName().c_str(),hook->type,(void*) hook->target);
HookData * hook_data = new HookData((void *) hook->target,hook->type);
pluginData->addHookData(hook_data);
}
for(size_t j=0;j<entry_t_list.size();j++){
wups_loader_entry_t * entry = entry_t_list[j];
DEBUG_FUNCTION_LINE("Saving entry \"%s\" of plugin \"%s\". Library: %08X, target: %08X, call_addr: %08X\n",entry->_function.name,pluginData->getPluginInformation()->getName().c_str(),entry->_function.library,entry->_function.target, (void *) entry->_function.call_addr);
EntryData * entry_data = new EntryData(entry->_function.name,entry->_function.library, (void *) entry->_function.target, (void *) entry->_function.call_addr);
pluginData->addEntryData(entry_data);
}
this->setCurrentStoreAddress((void *) curAddress);
result = true;
exit_error:
if (!result) DEBUG_FUNCTION_LINE("exit_error\n");
if (destinations != NULL){
free(destinations);
}
if (symtab != NULL){
free(symtab);
}
if (hooks != NULL){
free(hooks);
}
if (entries != NULL){
free(entries);
}
return result;
}
void PluginLoader::copyPluginDataIntoGlobalStruct(std::vector<PluginData *> plugins){
// Reset data
memset((void*)&gbl_replacement_data,0,sizeof(gbl_replacement_data));
int plugin_index = 0;
// Copy data to global struct.
for(size_t i = 0; i< plugins.size();i++){
PluginData * cur_plugin = plugins.at(i);
PluginInformation * cur_pluginInformation = cur_plugin->getPluginInformation();
std::vector<EntryData *> entry_data_list = cur_plugin->getEntryDataList();
std::vector<HookData *> hook_data_list = cur_plugin->getHookDataList();
if(plugin_index >= MAXIMUM_PLUGINS ){
DEBUG_FUNCTION_LINE("Maximum of %d plugins reached. %s won't be loaded!\n",MAXIMUM_PLUGINS,cur_pluginInformation->getName().c_str());
continue;
}
if(entry_data_list.size() > MAXIMUM_FUNCTION_PER_PLUGIN){
DEBUG_FUNCTION_LINE("Plugin %s would replace to many function (%d, maximum is %d). It won't be loaded.\n",cur_pluginInformation->getName().c_str(),entry_data_list.size(),MAXIMUM_FUNCTION_PER_PLUGIN);
continue;
}
if(hook_data_list.size() > MAXIMUM_HOOKS_PER_PLUGIN){
DEBUG_FUNCTION_LINE("Plugin %s would set too many hooks (%d, maximum is %d). It won't be loaded.\n",cur_pluginInformation->getName().c_str(),hook_data_list.size(),MAXIMUM_HOOKS_PER_PLUGIN);
continue;
}
replacement_data_plugin_t * plugin_data = &gbl_replacement_data.plugin_data[plugin_index];
strncpy(plugin_data->plugin_name,cur_pluginInformation->getName().c_str(),MAXIMUM_PLUGIN_NAME_LENGTH-1);
strncpy(plugin_data->path,cur_pluginInformation->getPath().c_str(),MAXIMUM_PLUGIN_PATH_NAME_LENGTH-1);
for(size_t j = 0; j < entry_data_list.size();j++){
replacement_data_function_t * function_data = &plugin_data->functions[j];
EntryData * cur_entry = entry_data_list[j];
DEBUG_FUNCTION_LINE("Adding entry \"%s\" for plugin \"%s\"\n",cur_entry->getName().c_str(),plugin_data->plugin_name);
//TODO: Warning/Error if string is too long.
strncpy(function_data->function_name,cur_entry->getName().c_str(),MAXIMUM_FUNCTION_NAME_LENGTH-1);
function_data->library = cur_entry->getLibrary();
function_data->replaceAddr = (u32) cur_entry->getReplaceAddress();
function_data->replaceCall = (u32) cur_entry->getReplaceCall();
plugin_data->number_used_functions++;
}
DEBUG_FUNCTION_LINE("Entries for plugin \"%s\": %d\n",plugin_data->plugin_name,plugin_data->number_used_functions);
for(size_t j = 0; j < hook_data_list.size();j++){
replacement_data_hook_t * hook_data = &plugin_data->hooks[j];
HookData * hook_entry = hook_data_list[j];
DEBUG_FUNCTION_LINE("Set hook for plugin \"%s\" of type %08X to target %08X\n",plugin_data->plugin_name,hook_entry->getType(),(void*) hook_entry->getFunctionPointer());
hook_data->func_pointer = (void*) hook_entry->getFunctionPointer();
hook_data->type = hook_entry->getType();
plugin_data->number_used_hooks++;
}
DEBUG_FUNCTION_LINE("Hooks for plugin \"%s\": %d\n",plugin_data->plugin_name,plugin_data->number_used_hooks);
plugin_index++;
gbl_replacement_data.number_used_plugins++;
}
}
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