mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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62 lines
2.0 KiB
C++
62 lines
2.0 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 <exosphere.hpp>
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#include "../secmon_map.hpp"
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#include "secmon_user_page_mapper.hpp"
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namespace ams::secmon::smc {
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bool UserPageMapper::Map() {
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this->virtual_address = MapSmcUserPage(this->physical_address);
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return this->virtual_address != 0;
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}
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void *UserPageMapper::GetPointerTo(uintptr_t phys, size_t size) const {
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/* Ensure we stay within the page. */
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if (util::AlignDown(phys, 4_KB) != this->physical_address) {
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return nullptr;
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}
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if (size != 0) {
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if (util::AlignDown(phys + size - 1, 4_KB) != this->physical_address) {
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return nullptr;
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}
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}
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return reinterpret_cast<void *>(phys + (this->virtual_address - this->physical_address));
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}
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bool UserPageMapper::CopyToUser(uintptr_t dst_phys, const void *src, size_t size) const {
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void * const dst = this->GetPointerTo(dst_phys, size);
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if (dst == nullptr) {
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return false;
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}
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std::memcpy(dst, src, size);
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return true;
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}
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bool UserPageMapper::CopyFromUser(void *dst, uintptr_t src_phys, size_t size) const {
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const void * const src = this->GetPointerTo(src_phys, size);
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if (src == nullptr) {
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return false;
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}
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std::memcpy(dst, src, size);
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return true;
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}
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}
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