mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
synced 2025-10-31 03:05:48 +01:00
67 lines
2.2 KiB
C++
67 lines
2.2 KiB
C++
/*
|
|
* Copyright (c) 2018-2020 Atmosphère-NX
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms and conditions of the GNU General Public License,
|
|
* version 2, as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
#include "ldr_patcher.hpp"
|
|
|
|
namespace ams::ldr {
|
|
|
|
namespace {
|
|
|
|
constexpr const char *NsoPatchesDirectory = "exefs_patches";
|
|
|
|
/* Exefs patches want to prevent modification of header, */
|
|
/* and also want to adjust offset relative to mapped location. */
|
|
constexpr size_t NsoPatchesProtectedSize = sizeof(NsoHeader);
|
|
constexpr size_t NsoPatchesProtectedOffset = sizeof(NsoHeader);
|
|
|
|
constexpr const char * const LoaderSdMountName = "#amsldr-sdpatch";
|
|
static_assert(sizeof(LoaderSdMountName) <= fs::MountNameLengthMax);
|
|
|
|
os::Mutex g_ldr_sd_lock(false);
|
|
bool g_mounted_sd;
|
|
|
|
bool EnsureSdCardMounted() {
|
|
std::scoped_lock lk(g_ldr_sd_lock);
|
|
|
|
if (g_mounted_sd) {
|
|
return true;
|
|
}
|
|
|
|
if (!cfg::IsSdCardInitialized()) {
|
|
return false;
|
|
}
|
|
|
|
if (R_FAILED(fs::MountSdCard(LoaderSdMountName))) {
|
|
return false;
|
|
}
|
|
|
|
return (g_mounted_sd = true);
|
|
}
|
|
|
|
|
|
}
|
|
|
|
/* Apply IPS patches. */
|
|
void LocateAndApplyIpsPatchesToModule(const u8 *build_id, uintptr_t mapped_nso, size_t mapped_size) {
|
|
if (!EnsureSdCardMounted()) {
|
|
return;
|
|
}
|
|
|
|
ro::ModuleId module_id;
|
|
std::memcpy(&module_id.build_id, build_id, sizeof(module_id.build_id));
|
|
ams::patcher::LocateAndApplyIpsPatchesToModule(LoaderSdMountName, NsoPatchesDirectory, NsoPatchesProtectedSize, NsoPatchesProtectedOffset, &module_id, reinterpret_cast<u8 *>(mapped_nso), mapped_size);
|
|
}
|
|
|
|
} |