mirror of
https://github.com/Atmosphere-NX/Atmosphere
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101 lines
3.5 KiB
C++
101 lines
3.5 KiB
C++
/*
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* Copyright (c) 2018 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 <stratosphere.hpp>
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#include <strings.h>
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#include "bpcmitm_reboot_manager.hpp"
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#include "../utils.hpp"
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/* TODO: Find a way to pre-populate this with the contents of fusee-primary. */
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static u8 g_reboot_payload[IRAM_PAYLOAD_MAX_SIZE] __attribute__ ((aligned (0x1000)));
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static u8 g_work_page[0x1000] __attribute__ ((aligned (0x1000)));
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static bool g_payload_loaded = false;
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static BpcRebootType g_reboot_type = BpcRebootType::ToPayload;
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void BpcRebootManager::Initialize() {
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/* Open payload file. */
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FsFile payload_file;
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if (R_FAILED(Utils::OpenSdFile("/atmosphere/reboot_payload.bin", FS_OPEN_READ, &payload_file))) {
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return;
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}
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ON_SCOPE_EXIT { fsFileClose(&payload_file); };
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/* Clear payload buffer */
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std::memset(g_reboot_payload, 0xFF, sizeof(g_reboot_payload));
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/* Read payload file. */
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size_t actual_size;
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fsFileRead(&payload_file, 0, g_reboot_payload, IRAM_PAYLOAD_MAX_SIZE, &actual_size);
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g_payload_loaded = true;
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/* Figure out what kind of reboot we're gonna be doing. */
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{
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char reboot_type[0x40] = {0};
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u64 reboot_type_size = 0;
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if (R_SUCCEEDED(Utils::GetSettingsItemValue("atmosphere", "power_menu_reboot_function", reboot_type, sizeof(reboot_type)-1, &reboot_type_size))) {
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if (strcasecmp(reboot_type, "stock") == 0 || strcasecmp(reboot_type, "normal") == 0 || strcasecmp(reboot_type, "standard") == 0) {
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g_reboot_type = BpcRebootType::Standard;
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} else if (strcasecmp(reboot_type, "rcm") == 0) {
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g_reboot_type = BpcRebootType::ToRcm;
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} else if (strcasecmp(reboot_type, "payload") == 0) {
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g_reboot_type = BpcRebootType::ToPayload;
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}
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}
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}
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}
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static void ClearIram() {
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/* Make page FFs. */
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memset(g_work_page, 0xFF, sizeof(g_work_page));
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/* Overwrite all of IRAM with FFs. */
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for (size_t ofs = 0; ofs < IRAM_PAYLOAD_MAX_SIZE; ofs += sizeof(g_work_page)) {
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CopyToIram(IRAM_PAYLOAD_BASE + ofs, g_work_page, sizeof(g_work_page));
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}
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}
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static void DoRebootToPayload() {
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/* If we don't actually have a payload loaded, just go to RCM. */
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if (!g_payload_loaded) {
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RebootToRcm();
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}
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/* Ensure clean IRAM state. */
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ClearIram();
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/* Copy in payload. */
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for (size_t ofs = 0; ofs < sizeof(g_reboot_payload); ofs += 0x1000) {
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CopyToIram(IRAM_PAYLOAD_BASE + ofs, &g_reboot_payload[ofs], 0x1000);
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}
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RebootToIramPayload();
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}
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Result BpcRebootManager::PerformReboot() {
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switch (g_reboot_type) {
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case BpcRebootType::Standard:
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return ResultAtmosphereMitmShouldForwardToSession;
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case BpcRebootType::ToRcm:
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RebootToRcm();
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return ResultSuccess;
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case BpcRebootType::ToPayload:
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default:
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DoRebootToPayload();
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return ResultSuccess;
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}
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}
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