mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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103 lines
3.9 KiB
C++
103 lines
3.9 KiB
C++
/*
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* Copyright (c) 2018-2019 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/map.hpp>
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#include "ro_nro_utils.hpp"
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namespace sts::ro::impl {
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namespace {
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constexpr size_t MaxMapRetries = 0x200;
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}
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Result MapNro(u64 *out_base_address, Handle process_handle, u64 nro_heap_address, u64 nro_heap_size, u64 bss_heap_address, u64 bss_heap_size) {
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map::MappedCodeMemory nro_mcm(ResultRoInternalError);
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map::MappedCodeMemory bss_mcm(ResultRoInternalError);
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u64 base_address;
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/* Map the NRO, and map the BSS immediately after it. */
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size_t i;
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for (i = 0; i < MaxMapRetries; i++) {
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map::MappedCodeMemory tmp_nro_mcm(ResultRoInternalError);
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R_TRY(map::MapCodeMemoryInProcess(tmp_nro_mcm, process_handle, nro_heap_address, nro_heap_size));
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base_address = tmp_nro_mcm.GetDstAddress();
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if (bss_heap_size > 0) {
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map::MappedCodeMemory tmp_bss_mcm(process_handle, base_address + nro_heap_size, bss_heap_address, bss_heap_size);
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R_TRY_CATCH(tmp_bss_mcm.GetResult()) {
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R_CATCH(ResultKernelInvalidMemoryState) {
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continue;
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}
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} R_END_TRY_CATCH;
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if (!map::CanAddGuardRegionsInProcess(process_handle, base_address, nro_heap_size + bss_heap_size)) {
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continue;
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}
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bss_mcm = std::move(tmp_bss_mcm);
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} else {
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if (!map::CanAddGuardRegionsInProcess(process_handle, base_address, nro_heap_size)) {
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continue;
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}
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}
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nro_mcm = std::move(tmp_nro_mcm);
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break;
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}
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if (i == MaxMapRetries) {
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return ResultRoInsufficientAddressSpace;
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}
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/* Invalidation here actually prevents them from unmapping at scope exit. */
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nro_mcm.Invalidate();
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bss_mcm.Invalidate();
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*out_base_address = base_address;
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return ResultSuccess;
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}
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Result SetNroPerms(Handle 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(svcSetProcessMemoryPermission(process_handle, base_address + rx_offset, rx_size, Perm_Rx));
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R_TRY(svcSetProcessMemoryPermission(process_handle, base_address + ro_offset, ro_size, Perm_R ));
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R_TRY(svcSetProcessMemoryPermission(process_handle, base_address + rw_offset, rw_size, Perm_Rw));
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return ResultSuccess;
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}
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Result UnmapNro(Handle process_handle, u64 base_address, u64 nro_heap_address, u64 bss_heap_address, u64 bss_heap_size, u64 code_size, u64 rw_size) {
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/* First, unmap bss. */
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if (bss_heap_size > 0) {
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R_TRY(svcUnmapProcessCodeMemory(process_handle, base_address + code_size + rw_size, bss_heap_address, bss_heap_size));
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}
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/* Next, unmap .rwdata */
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if (rw_size > 0) {
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R_TRY(svcUnmapProcessCodeMemory(process_handle, base_address + code_size, nro_heap_address + code_size, rw_size));
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}
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/* Finally, unmap .text + .rodata. */
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R_TRY(svcUnmapProcessCodeMemory(process_handle, base_address, nro_heap_address, code_size));
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return ResultSuccess;
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}
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}
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