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Atmosphere/exosphere/program/source/secmon_error.cpp
2020-07-02 14:06:42 -07:00

204 lines
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7.6 KiB
C++

/*
* Copyright (c) 2018-2020 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 <exosphere.hpp>
#include "secmon_error.hpp"
namespace ams {
namespace {
constexpr bool SaveSystemStateForDebug = false;
constexpr bool LogSystemStateForDebug = false;
void LogU64(u64 value) {
char buffer[2 * sizeof(value)];
for (size_t i = 0; i < sizeof(value); ++i) {
buffer[sizeof(buffer) - 1 - (2 * i) - 0] = "0123456789ABCDEF"[(value >> 0) & 0xF];
buffer[sizeof(buffer) - 1 - (2 * i) - 1] = "0123456789ABCDEF"[(value >> 4) & 0xF];
value >>= 8;
}
log::SendText(buffer, sizeof(buffer));
}
}
}
namespace ams::diag {
namespace {
ALWAYS_INLINE void SaveSystemStateForDebugAbort() {
*(volatile u32 *)(secmon::MemoryRegionVirtualDebug.GetAddress() + 0x00) = 0xDDDDDDDD;
u64 temp_reg;
__asm__ __volatile__("mov %0, lr" : "=r"(temp_reg) :: "memory");
*(volatile u32 *)(secmon::MemoryRegionVirtualDebug.GetAddress() + 0x10) = static_cast<u32>(temp_reg >> 0);
*(volatile u32 *)(secmon::MemoryRegionVirtualDebug.GetAddress() + 0x14) = static_cast<u32>(temp_reg >> 32);
__asm__ __volatile__("mov %0, sp" : "=r"(temp_reg) :: "memory");
for (int i = 0; i < 0x100; i += 4) {
*(volatile u32 *)(secmon::MemoryRegionVirtualDebug.GetAddress() + 0x20 + i) = *(volatile u32 *)(temp_reg + i);
}
*(volatile u32 *)(secmon::MemoryRegionVirtualDevicePmc.GetAddress() + 0x50) = 0x02;
*(volatile u32 *)(secmon::MemoryRegionVirtualDevicePmc.GetAddress() + 0x00) = 0x10;
util::WaitMicroSeconds(1000);
}
}
void AbortImpl() {
/* Perform any necessary (typically none) debugging. */
if constexpr (SaveSystemStateForDebug) {
SaveSystemStateForDebugAbort();
}
secmon::SetError(pkg1::ErrorInfo_UnknownAbort);
secmon::ErrorReboot();
}
}
namespace ams::secmon {
namespace {
constexpr inline uintptr_t PMC = MemoryRegionVirtualDevicePmc.GetAddress();
ALWAYS_INLINE void SaveSystemStateForDebugErrorReboot() {
u64 temp_reg;
*(volatile u32 *)(secmon::MemoryRegionVirtualDebug.GetAddress() + 0x00) = 0x5A5A5A5A;
__asm__ __volatile__("mrs %0, esr_el3" : "=r"(temp_reg) :: "memory");
*(volatile u32 *)(secmon::MemoryRegionVirtualDebug.GetAddress() + 0x08) = static_cast<u32>(temp_reg >> 0);
*(volatile u32 *)(secmon::MemoryRegionVirtualDebug.GetAddress() + 0x0C) = static_cast<u32>(temp_reg >> 32);
__asm__ __volatile__("mrs %0, elr_el3" : "=r"(temp_reg) :: "memory");
*(volatile u32 *)(secmon::MemoryRegionVirtualDebug.GetAddress() + 0x10) = static_cast<u32>(temp_reg >> 0);
*(volatile u32 *)(secmon::MemoryRegionVirtualDebug.GetAddress() + 0x14) = static_cast<u32>(temp_reg >> 32);
__asm__ __volatile__("mrs %0, far_el3" : "=r"(temp_reg) :: "memory");
*(volatile u32 *)(secmon::MemoryRegionVirtualDebug.GetAddress() + 0x18) = static_cast<u32>(temp_reg >> 0);
*(volatile u32 *)(secmon::MemoryRegionVirtualDebug.GetAddress() + 0x1C) = static_cast<u32>(temp_reg >> 32);
__asm__ __volatile__("mov %0, lr" : "=r"(temp_reg) :: "memory");
*(volatile u32 *)(secmon::MemoryRegionVirtualDebug.GetAddress() + 0x20) = static_cast<u32>(temp_reg >> 0);
*(volatile u32 *)(secmon::MemoryRegionVirtualDebug.GetAddress() + 0x24) = static_cast<u32>(temp_reg >> 32);
__asm__ __volatile__("mov %0, sp" : "=r"(temp_reg) :: "memory");
*(volatile u32 *)(secmon::MemoryRegionVirtualDebug.GetAddress() + 0x30) = static_cast<u32>(temp_reg >> 0);
*(volatile u32 *)(secmon::MemoryRegionVirtualDebug.GetAddress() + 0x34) = static_cast<u32>(temp_reg >> 32);
for (int i = 0; i < 0x100; i += 4) {
*(volatile u32 *)(secmon::MemoryRegionVirtualDebug.GetAddress() + 0x40 + i) = *(volatile u32 *)(temp_reg + i);
}
*(volatile u32 *)(secmon::MemoryRegionVirtualDevicePmc.GetAddress() + 0x50) = 0x02;
*(volatile u32 *)(secmon::MemoryRegionVirtualDevicePmc.GetAddress() + 0x00) = 0x10;
util::WaitMicroSeconds(1000);
}
ALWAYS_INLINE void LogSystemStateForDebugErrorReboot(u64 lr, u64 sp) {
log::SendText("*** Error Reboot ***\n", 21);
log::Flush();
u64 temp_reg;
__asm__ __volatile__("mrs %0, esr_el3" : "=r"(temp_reg) :: "memory");
log::SendText("ESR_EL3: ", 9);
LogU64(temp_reg);
log::SendText("\n", 1);
log::Flush();
__asm__ __volatile__("mrs %0, elr_el3" : "=r"(temp_reg) :: "memory");
log::SendText("ELR_EL3: ", 9);
LogU64(temp_reg);
log::SendText("\n", 1);
log::Flush();
__asm__ __volatile__("mrs %0, far_el3" : "=r"(temp_reg) :: "memory");
log::SendText("FAR_EL3: ", 9);
LogU64(temp_reg);
log::SendText("\n", 1);
log::Flush();
log::SendText("LR: ", 9);
LogU64(lr);
log::SendText("\n", 1);
log::Flush();
log::SendText("SP: ", 9);
LogU64(sp);
log::SendText("\n", 1);
log::Flush();
log::SendText("Stack:\n", 7);
log::Flush();
char buf[2];
for (int i = 0; i < 0x100; ++i) {
const u8 byte = *(volatile u8 *)(sp + i);
buf[0] = "0123456789ABCDEF"[(byte >> 4) & 0xF];
buf[1] = "0123456789ABCDEF"[(byte >> 0) & 0xF];
log::SendText(buf, 2);
log::Flush();
if (util::IsAligned(i + 1, 0x10)) {
log::SendText("\n", 1);
log::Flush();
}
}
}
}
void SetError(pkg1::ErrorInfo info) {
const uintptr_t address = secmon::MemoryRegionVirtualDevicePmc.GetAddress() + PKG1_SECURE_MONITOR_PMC_ERROR_SCRATCH;
if (reg::Read(address) == pkg1::ErrorInfo_None) {
reg::Write(address, info);
}
}
NORETURN void ErrorReboot() {
/* Perform any necessary (typically none) debugging. */
if constexpr (SaveSystemStateForDebug) {
SaveSystemStateForDebugErrorReboot();
}
if constexpr (LogSystemStateForDebug) {
u64 lr, sp;
__asm__ __volatile__("mov %0, lr" : "=r"(lr) :: "memory");
__asm__ __volatile__("mov %0, sp" : "=r"(sp) :: "memory");
LogSystemStateForDebugErrorReboot(lr, sp);
}
/* Lockout the security engine. */
se::Lockout();
/* Lockout fuses. */
fuse::Lockout();
/* Disable crypto operations after reboot. */
reg::Write(PMC + APBDEV_PMC_CRYPTO_OP, 0);
while (true) {
wdt::Reboot();
}
}
}