mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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67 lines
No EOL
2.2 KiB
C++
67 lines
No EOL
2.2 KiB
C++
/*
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* Copyright (c) 2018-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "ldr_patcher.hpp"
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namespace ams::ldr {
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namespace {
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constexpr const char *NsoPatchesDirectory = "exefs_patches";
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/* Exefs patches want to prevent modification of header, */
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/* and also want to adjust offset relative to mapped location. */
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constexpr size_t NsoPatchesProtectedSize = sizeof(NsoHeader);
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constexpr size_t NsoPatchesProtectedOffset = sizeof(NsoHeader);
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constexpr const char * const LoaderSdMountName = "#amsldr-sdpatch";
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static_assert(sizeof(LoaderSdMountName) <= fs::MountNameLengthMax);
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os::Mutex g_ldr_sd_lock(false);
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bool g_mounted_sd;
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bool EnsureSdCardMounted() {
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std::scoped_lock lk(g_ldr_sd_lock);
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if (g_mounted_sd) {
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return true;
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}
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if (!cfg::IsSdCardInitialized()) {
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return false;
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}
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if (R_FAILED(fs::MountSdCard(LoaderSdMountName))) {
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return false;
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}
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return (g_mounted_sd = true);
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}
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}
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/* Apply IPS patches. */
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void LocateAndApplyIpsPatchesToModule(const u8 *build_id, uintptr_t mapped_nso, size_t mapped_size) {
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if (!EnsureSdCardMounted()) {
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return;
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}
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ro::ModuleId module_id;
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std::memcpy(&module_id.build_id, build_id, sizeof(module_id.build_id));
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ams::patcher::LocateAndApplyIpsPatchesToModule(LoaderSdMountName, NsoPatchesDirectory, NsoPatchesProtectedSize, NsoPatchesProtectedOffset, &module_id, reinterpret_cast<u8 *>(mapped_nso), mapped_size);
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}
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} |