mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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76 lines
3.2 KiB
C++
76 lines
3.2 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 "ro_nro_utils.hpp"
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#include "ro_random.hpp"
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namespace ams::ro::impl {
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namespace {
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ALWAYS_INLINE size_t SetupNroProcessMemoryRegions(os::ProcessMemoryRegion *regions, u64 nro_heap_address, u64 nro_heap_size, u64 bss_heap_address, u64 bss_heap_size) {
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/* Reset region count. */
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size_t num_regions = 0;
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/* We always want a region for the nro. */
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regions[num_regions++] = { nro_heap_address, nro_heap_size };
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/* If we have bss, create a region for bss. */
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if (bss_heap_size > 0) {
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regions[num_regions++] = { bss_heap_address, bss_heap_size };
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}
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return num_regions;
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}
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}
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Result MapNro(u64 *out_base_address, os::NativeHandle process_handle, u64 nro_heap_address, u64 nro_heap_size, u64 bss_heap_address, u64 bss_heap_size) {
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/* Set up the process memory regions. */
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os::ProcessMemoryRegion regions[2];
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const size_t num_regions = SetupNroProcessMemoryRegions(regions, nro_heap_address, nro_heap_size, bss_heap_address, bss_heap_size);
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/* Re-map the nro/bss as code memory in the destination process. */
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R_TRY_CATCH(os::MapProcessCodeMemory(out_base_address, process_handle, regions, num_regions, ro::impl::GenerateSecureRandom)) {
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R_CONVERT(os::ResultOutOfAddressSpace, ro::ResultOutOfAddressSpace())
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} R_END_TRY_CATCH;
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R_SUCCEED();
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}
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Result SetNroPerms(os::NativeHandle process_handle, u64 base_address, u64 rx_size, u64 ro_size, u64 rw_size) {
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const u64 rx_offset = 0;
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const u64 ro_offset = rx_offset + rx_size;
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const u64 rw_offset = ro_offset + ro_size;
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R_TRY(os::SetProcessMemoryPermission(process_handle, base_address + rx_offset, rx_size, os::MemoryPermission_ReadExecute));
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R_TRY(os::SetProcessMemoryPermission(process_handle, base_address + ro_offset, ro_size, os::MemoryPermission_ReadOnly));
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R_TRY(os::SetProcessMemoryPermission(process_handle, base_address + rw_offset, rw_size, os::MemoryPermission_ReadWrite));
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R_SUCCEED();
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}
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Result UnmapNro(os::NativeHandle process_handle, u64 base_address, u64 nro_heap_address, u64 nro_heap_size, u64 bss_heap_address, u64 bss_heap_size) {
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/* Set up the process memory regions. */
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os::ProcessMemoryRegion regions[2];
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const size_t num_regions = SetupNroProcessMemoryRegions(regions, nro_heap_address, nro_heap_size, bss_heap_address, bss_heap_size);
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/* Unmap the nro/bss. */
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R_RETURN(os::UnmapProcessCodeMemory(process_handle, base_address, regions, num_regions));
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}
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}
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