mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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75 lines
3.3 KiB
C++
75 lines
3.3 KiB
C++
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/*
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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 <mesosphere.hpp>
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namespace ams::kern {
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namespace {
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KVirtualAddress GetInitialProcessBinaryAddress() {
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return KMemoryLayout::GetPageTableHeapRegion().GetEndAddress() - InitialProcessBinarySizeMax;
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}
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void LoadInitialProcessBinaryHeader(InitialProcessBinaryHeader *header) {
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if (header->magic != InitialProcessBinaryMagic) {
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*header = *GetPointer<InitialProcessBinaryHeader>(GetInitialProcessBinaryAddress());
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}
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MESOSPHERE_ABORT_UNLESS(header->magic == InitialProcessBinaryMagic);
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MESOSPHERE_ABORT_UNLESS(header->num_processes <= init::GetSlabResourceCounts().num_KProcess);
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}
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KVirtualAddress g_initial_process_binary_address;
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InitialProcessBinaryHeader g_initial_process_binary_header;
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u64 g_initial_process_id_min = std::numeric_limits<u64>::max();
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u64 g_initial_process_id_max = std::numeric_limits<u64>::min();
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}
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u64 GetInitialProcessIdMin() {
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return g_initial_process_id_min;
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}
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u64 GetInitialProcessIdMax() {
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return g_initial_process_id_max;
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}
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void CopyInitialProcessBinaryToKernelMemory() {
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LoadInitialProcessBinaryHeader(&g_initial_process_binary_header);
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if (g_initial_process_binary_header.num_processes > 0) {
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/* Reserve pages for the initial process binary from the system resource limit. */
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auto &mm = Kernel::GetMemoryManager();
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const size_t total_size = util::AlignUp(g_initial_process_binary_header.size, PageSize);
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const size_t num_pages = total_size / PageSize;
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MESOSPHERE_ABORT_UNLESS(Kernel::GetSystemResourceLimit().Reserve(ams::svc::LimitableResource_PhysicalMemoryMax, total_size));
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/* Allocate memory for the image. */
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const KMemoryManager::Pool pool = static_cast<KMemoryManager::Pool>(KSystemControl::GetInitialProcessBinaryPool());
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const auto allocate_option = KMemoryManager::EncodeOption(pool, KMemoryManager::Direction_FromFront);
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KVirtualAddress allocated_memory = mm.AllocateContinuous(num_pages, 1, allocate_option);
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MESOSPHERE_ABORT_UNLESS(allocated_memory != Null<KVirtualAddress>);
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mm.Open(allocated_memory, num_pages);
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/* Relocate the image. */
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std::memmove(GetVoidPointer(allocated_memory), GetVoidPointer(GetInitialProcessBinaryAddress()), g_initial_process_binary_header.size);
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std::memset(GetVoidPointer(GetInitialProcessBinaryAddress()), 0, g_initial_process_binary_header.size);
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g_initial_process_binary_address = allocated_memory;
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}
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}
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}
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