mirror of
https://github.com/Atmosphere-NX/Atmosphere.git
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99 lines
No EOL
3.4 KiB
C++
99 lines
No EOL
3.4 KiB
C++
/*
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* Copyright (c) 2018-2020 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 <exosphere.hpp>
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#include "secmon_error.hpp"
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namespace ams::secmon {
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namespace {
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constexpr inline uintptr_t PMC = MemoryRegionVirtualDevicePmc.GetAddress();
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constinit std::atomic_bool g_is_locked = false;
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}
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void ExceptionHandlerImpl(uintptr_t lr, uintptr_t sp) {
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/* On release config, we won't actually use the passed parameters. */
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AMS_UNUSED(lr, sp);
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/* Ensure that previous logs have been flushed. */
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AMS_LOG_FLUSH();
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/* Get system registers. */
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uintptr_t far_el1, far_el3, elr_el3;
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util::BitPack32 esr_el3;
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HW_CPU_GET_FAR_EL1(far_el1);
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HW_CPU_GET_FAR_EL3(far_el3);
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HW_CPU_GET_ELR_EL3(elr_el3);
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HW_CPU_GET_ESR_EL3(esr_el3);
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/* Print some whitespace before the exception handler. */
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AMS_LOG("\n\n");
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AMS_SECMON_LOG("ExceptionHandler\n");
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AMS_SECMON_LOG("----------------\n");
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AMS_SECMON_LOG("esr: 0x%08X\n", esr_el3.value);
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AMS_SECMON_LOG(" Exception Class: 0x%02X\n", esr_el3.Get<hw::EsrEl3::Ec>());
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AMS_SECMON_LOG(" Instruction Length: %d\n", esr_el3.Get<hw::EsrEl3::Il>() ? 32 : 16);
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AMS_SECMON_LOG(" Instruction Specific Syndrome: 0x%07X\n", esr_el3.Get<hw::EsrEl3::Iss>());
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AMS_SECMON_LOG("far_el1: 0x%016lX\n", far_el1);
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AMS_SECMON_LOG("far_el3: 0x%016lX\n", far_el3);
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AMS_SECMON_LOG("elr_el3: 0x%016lX\n", elr_el3);
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AMS_SECMON_LOG("lr: 0x%016lX\n", lr);
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AMS_SECMON_LOG("sp: 0x%016lX\n", sp);
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AMS_DUMP(reinterpret_cast<void *>(sp), util::AlignUp(sp, mmu::PageSize) - sp);
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AMS_LOG_FLUSH();
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}
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NORETURN void ExceptionHandler() {
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/* Get link register and stack pointer. */
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u64 lr, sp;
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{
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__asm__ __volatile__("mov %0, lr" : "=r"(lr) :: "memory");
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__asm__ __volatile__("mov %0, sp" : "=r"(sp) :: "memory");
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}
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/* Acquire exclusive access to exception handling logic. */
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if (!g_is_locked.exchange(true)) {
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/* Invoke the exception handler impl. */
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ExceptionHandlerImpl(lr, sp);
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/* Lockout the security engine. */
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se::Lockout();
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/* Lockout fuses. */
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fuse::Lockout();
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/* Disable crypto operations after reboot. */
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reg::Write(PMC + APBDEV_PMC_CRYPTO_OP, 0);
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/* Perform an error reboot. */
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secmon::SetError(pkg1::ErrorInfo_UnknownAbort);
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secmon::ErrorReboot();
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} else {
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/* Wait forever while the first core prints the exception and reboots. */
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while (true) {
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util::WaitMicroSeconds(1000);
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}
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}
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}
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} |