Atmosphere/stratosphere/loader/source/ldr_patcher.cpp

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/*
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* Copyright (c) 2018-2019 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/>.
*/
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#include <cstring>
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#include <stratosphere/patcher.hpp>
#include <stratosphere/ro.hpp>
#include "ldr_patcher.hpp"
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namespace sts::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, */
/* and also want to adjust offset relative to mapped location. */
constexpr size_t NsoPatchesProtectedSize = sizeof(NsoHeader);
constexpr size_t NsoPatchesProtectedOffset = sizeof(NsoHeader);
}
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/* Apply IPS patches. */
void LocateAndApplyIpsPatchesToModule(const u8 *build_id, uintptr_t mapped_nso, size_t mapped_size) {
ro::ModuleId module_id;
std::memcpy(&module_id.build_id, build_id, sizeof(module_id.build_id));
sts::patcher::LocateAndApplyIpsPatchesToModule(NsoPatchesDirectory, NsoPatchesProtectedSize, NsoPatchesProtectedOffset, &module_id, reinterpret_cast<u8 *>(mapped_nso), mapped_size);
}
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}