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https://github.com/Atmosphere-NX/Atmosphere-libs.git
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59 lines
2.2 KiB
C++
59 lines
2.2 KiB
C++
/*
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* Copyright (c) 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 <stratosphere.hpp>
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#include <stratosphere/windows.hpp>
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namespace ams::os::impl {
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void SetMemoryPermissionImpl(uintptr_t address, size_t size, MemoryPermission perm) {
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DWORD old;
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uintptr_t cur_address = address;
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size_t remaining = size;
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while (remaining > 0) {
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const size_t cur_size = std::min<size_t>(remaining, 2_GB);
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switch (perm) {
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case MemoryPermission_None:
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{
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auto res = ::VirtualProtect(reinterpret_cast<LPVOID>(cur_address), static_cast<DWORD>(cur_size), PAGE_NOACCESS, std::addressof(old));
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AMS_ABORT_UNLESS(res);
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AMS_UNUSED(res);
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}
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break;
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case MemoryPermission_ReadOnly:
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{
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auto res = ::VirtualProtect(reinterpret_cast<LPVOID>(cur_address), static_cast<DWORD>(cur_size), PAGE_READONLY, std::addressof(old));
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AMS_ABORT_UNLESS(res);
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AMS_UNUSED(res);
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}
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break;
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case MemoryPermission_ReadWrite:
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{
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auto res = ::VirtualProtect(reinterpret_cast<LPVOID>(cur_address), static_cast<DWORD>(cur_size), PAGE_READWRITE, std::addressof(old));
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AMS_ABORT_UNLESS(res);
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AMS_UNUSED(res);
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}
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break;
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AMS_UNREACHABLE_DEFAULT_CASE();
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}
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cur_address += cur_size;
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remaining -= cur_size;
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}
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}
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}
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