mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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113 lines
4.1 KiB
C++
113 lines
4.1 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 <switch.h>
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#include <cstdio>
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#include "ldr_map.hpp"
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Result MapUtils::LocateSpaceForMap(u64 *out, u64 out_size) {
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if (GetRuntimeFirmwareVersion() >= FirmwareVersion_200) {
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return LocateSpaceForMapModern(out, out_size);
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} else {
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return LocateSpaceForMapDeprecated(out, out_size);
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}
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}
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Result MapUtils::LocateSpaceForMapModern(u64 *out, u64 out_size) {
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MemoryInfo mem_info = {};
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AddressSpaceInfo address_space = {};
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u32 page_info = 0;
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u64 cur_base = 0, cur_end = 0;
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R_TRY(GetAddressSpaceInfo(&address_space, CUR_PROCESS_HANDLE));
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cur_base = address_space.addspace_base;
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cur_end = cur_base + out_size;
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if (cur_end <= cur_base) {
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return ResultKernelOutOfMemory;
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}
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while (true) {
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if (address_space.heap_size && (address_space.heap_base <= cur_end - 1 && cur_base <= address_space.heap_end - 1)) {
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/* If we overlap the heap region, go to the end of the heap region. */
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if (cur_base == address_space.heap_end) {
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return ResultKernelOutOfMemory;
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}
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cur_base = address_space.heap_end;
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} else if (address_space.map_size && (address_space.map_base <= cur_end - 1 && cur_base <= address_space.map_end - 1)) {
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/* If we overlap the map region, go to the end of the map region. */
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if (cur_base == address_space.map_end) {
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return ResultKernelOutOfMemory;
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}
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cur_base = address_space.map_end;
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} else {
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R_ASSERT(svcQueryMemory(&mem_info, &page_info, cur_base));
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if (mem_info.type == 0 && mem_info.addr - cur_base + mem_info.size >= out_size) {
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*out = cur_base;
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return ResultSuccess;
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}
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if (mem_info.addr + mem_info.size <= cur_base) {
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return ResultKernelOutOfMemory;
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}
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cur_base = mem_info.addr + mem_info.size;
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if (cur_base >= address_space.addspace_end) {
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return ResultKernelOutOfMemory;
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}
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}
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cur_end = cur_base + out_size;
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if (cur_base + out_size <= cur_base) {
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return ResultKernelOutOfMemory;
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}
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}
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}
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Result MapUtils::LocateSpaceForMapDeprecated(u64 *out, u64 out_size) {
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MemoryInfo mem_info = {};
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u32 page_info = 0;
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u64 cur_base = 0x8000000ULL;
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do {
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R_TRY(svcQueryMemory(&mem_info, &page_info, cur_base));
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if (mem_info.type == 0 && mem_info.addr - cur_base + mem_info.size >= out_size) {
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*out = cur_base;
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return ResultSuccess;
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}
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const u64 mem_end = mem_info.addr + mem_info.size;
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if (mem_info.type == 0x10 || mem_end < cur_base || (mem_end >> 31)) {
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return ResultKernelOutOfMemory;
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}
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cur_base = mem_end;
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} while (true);
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}
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Result MapUtils::GetAddressSpaceInfo(AddressSpaceInfo *out, Handle process_h) {
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R_TRY(svcGetInfo(&out->heap_base, 4, process_h, 0));
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R_TRY(svcGetInfo(&out->heap_size, 5, process_h, 0));
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R_TRY(svcGetInfo(&out->map_base, 2, process_h, 0));
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R_TRY(svcGetInfo(&out->map_size, 3, process_h, 0));
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R_TRY(svcGetInfo(&out->addspace_base, 12, process_h, 0));
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R_TRY(svcGetInfo(&out->addspace_size, 13, process_h, 0));
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out->heap_end = out->heap_base + out->heap_size;
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out->map_end = out->map_base + out->map_size;
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out->addspace_end = out->addspace_base + out->addspace_size;
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return ResultSuccess;
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}
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