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124 lines
3.8 KiB
C++
124 lines
3.8 KiB
C++
/**
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* vim: set ts=4 :
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* =============================================================================
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* SourceMod
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* Copyright (C) 2004-2017 AlliedModders LLC. All rights reserved.
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* =============================================================================
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License, version 3.0, as published by the
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* Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* As a special exception, AlliedModders LLC gives you permission to link the
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* code of this program (as well as its derivative works) to "Half-Life 2," the
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* "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
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* by the Valve Corporation. You must obey the GNU General Public License in
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* all respects for all other code used. Additionally, AlliedModders LLC grants
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* this exception to all derivative works. AlliedModders LLC defines further
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* exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
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* or <http://www.sourcemod.net/license.php>.
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*/
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#include "PseudoAddrManager.h"
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#include <bridge/include/CoreProvider.h>
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#ifdef PLATFORM_APPLE
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#include <mach/mach.h>
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#include <mach/vm_region.h>
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#endif
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#ifdef PLATFORM_LINUX
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#include <inttypes.h>
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#endif
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#ifdef PLATFORM_WINDOWS
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#include <Psapi.h>
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#endif
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PseudoAddressManager::PseudoAddressManager() : m_dictionary(am::IPlatform::GetDefault())
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{
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}
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void PseudoAddressManager::Initialize() {
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#ifdef PLATFORM_WINDOWS
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auto process = GetCurrentProcess();
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auto get_module_details = [process](const char* name, void*& baseAddress, size_t& moduleSize) {
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if (process == NULL) {
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return false;
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}
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auto hndl = GetModuleHandle(name);
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if (hndl == NULL) {
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return false;
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}
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MODULEINFO info;
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if (!GetModuleInformation(process, hndl, &info, sizeof(info))) {
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return false;
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}
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moduleSize = info.SizeOfImage;
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baseAddress = info.lpBaseOfDll;
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return true;
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};
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#endif
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#ifdef PLATFORM_LINUX
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auto get_module_details = [](const char* name, void* baseAddress, size_t& moduleSize) {
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auto hndl = dlopen(name, RTLD_NOLOAD);
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if (hndl == NULL) {
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return false;
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}
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void* addr = dlsym(hndl, "CreateInterface");
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dlclose(hndl);
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if (!addr) {
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return false;
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}
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Dl_info info;
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if (dladdr(addr, &info) == 0) {
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return false;
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}
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baseAddress = info.dli_fbase;
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// It doesn't matter much if we figure out the module size
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// libaddrz coalesce maps on linux
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moduleSize = 0;
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return true;
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};
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#endif
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// Early map commonly used modules, it's okay if not all of them are here
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// Everything else will be caught by "ToPseudoAddress" but you risk running out of ranges by then
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const char* libs[] = { "engine", "server", "tier0", "vstdlib" };
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char formattedName[64];
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for (int i = 0; i < sizeof(libs) / sizeof(const char*); i++) {
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bridge->FormatSourceBinaryName(libs[i], formattedName, sizeof(formattedName));
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void* base_addr = nullptr;
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size_t module_size = 0;
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if (get_module_details(formattedName, base_addr, module_size)) {
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// Create the mapping (hopefully)
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m_dictionary.Make32bitAddress(base_addr, module_size);
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}
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}
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}
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void *PseudoAddressManager::FromPseudoAddress(uint32_t paddr)
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{
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if (paddr == 0) {
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return nullptr;
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}
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return m_dictionary.RecoverAddress(paddr).value_or(nullptr);
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}
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uint32_t PseudoAddressManager::ToPseudoAddress(void *addr)
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{
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if (addr == nullptr) {
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return 0;
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}
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return m_dictionary.Make32bitAddress(addr).value_or(0);
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}
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