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boot: functional exception handling/rebooting to payload

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This commit is contained in:
Michael Scire 2019-05-02 17:55:50 -07:00
parent 9319463a6e
commit 505324f625
4 changed files with 123 additions and 4 deletions
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68
stratosphere/boot/source/boot_reboot_manager.cpp Normal file
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/*
* Copyright (c) 2018-2019 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <switch.h>
#include <stratosphere.hpp>
#include <strings.h>
#include "boot_reboot_manager.hpp"
#include "fusee-primary_bin.h"
static u8 g_work_page[0x1000] __attribute__ ((aligned (0x1000)));
static void ClearIram() {
/* Make page FFs. */
memset(g_work_page, 0xFF, sizeof(g_work_page));
/* Overwrite all of IRAM with FFs. */
for (size_t ofs = 0; ofs < IRAM_SIZE; ofs += sizeof(g_work_page)) {
CopyToIram(IRAM_BASE + ofs, g_work_page, sizeof(g_work_page));
}
}
static void DoRebootToPayload() {
/* Ensure clean IRAM state. */
ClearIram();
/* Copy in payload. */
for (size_t ofs = 0; ofs < fusee_primary_bin_size; ofs += 0x1000) {
std::memcpy(g_work_page, &fusee_primary_bin[ofs], std::min(static_cast<size_t>(fusee_primary_bin_size - ofs), size_t(0x1000)));
CopyToIram(IRAM_PAYLOAD_BASE + ofs, g_work_page, 0x1000);
}
RebootToIramPayload();
}
Result BootRebootManager::PerformReboot() {
DoRebootToPayload();
return ResultSuccess;
}
void BootRebootManager::RebootForFatalError(AtmosphereFatalErrorContext *ctx) {
/* Ensure clean IRAM state. */
ClearIram();
/* Copy in payload. */
for (size_t ofs = 0; ofs < fusee_primary_bin_size; ofs += 0x1000) {
std::memcpy(g_work_page, &fusee_primary_bin[ofs], std::min(static_cast<size_t>(fusee_primary_bin_size - ofs), size_t(0x1000)));
CopyToIram(IRAM_PAYLOAD_BASE + ofs, g_work_page, 0x1000);
}
std::memset(g_work_page, 0xCC, sizeof(g_work_page));
std::memcpy(g_work_page, ctx, sizeof(*ctx));
CopyToIram(IRAM_PAYLOAD_BASE + IRAM_PAYLOAD_MAX_SIZE, g_work_page, sizeof(g_work_page));
RebootToIramPayload();
}