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fusee: attempt reboot to self if possible, better abort/fatal handlers

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This commit is contained in:
Michael Scire 2021-09-05 20:57:04 -07:00 committed by SciresM
parent 005aac5a2b
commit dda7ea6ac2
4 changed files with 71 additions and 46 deletions
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5
fusee/program/program.ld
View file

@ -22,11 +22,12 @@ SECTIONS
FILL(0x00000000)
KEEP(*(.text._ZN3ams4util15GetMicroSecondsEv))
KEEP(*(.text._ZN3ams4util16WaitMicroSecondsEi))
KEEP(*(.text._ZN3ams6nxboot14ShowFatalErrorEPKcz))
KEEP(*(.text._ZN3ams6nxboot10UncompressEPvjPKvj))
KEEP(*(.text.memcpy))
KEEP(*(.text.memset))
KEEP(*(.text.memcmp))
KEEP(*(.text._ZN3ams6nxboot14ShowFatalErrorEPKcz))
KEEP(*(.text._ZN3ams6nxboot10UncompressEPvjPKvj))
KEEP(*(.text._ZN3ams6nxboot12RebootToSelfEv))
_*.o(SORT(.text*))
*(.text.unlikely .text.*_unlikely .text.unlikely.*)
*(.text.exit .text.exit.*)

55
fusee/program/source/fusee_exception_handler.cpp
View file

@ -15,28 +15,12 @@
*/
#include <exosphere.hpp>
#include "fusee_exception_handler.hpp"
#include "fusee_fatal.hpp"
namespace ams::nxboot {
NORETURN void ErrorStop() {
/* ABORT? */
*reinterpret_cast<volatile u32 *>(0x40038000) = 0xDEADDEAD;
*reinterpret_cast<volatile u32 *>(0x7000E400) = 0x10;
/* Halt ourselves. */
while (true) {
reg::Write(secmon::MemoryRegionPhysicalDeviceFlowController.GetAddress() + FLOW_CTLR_HALT_COP_EVENTS, FLOW_REG_BITS_ENUM(HALT_COP_EVENTS_MODE, FLOW_MODE_STOP),
FLOW_REG_BITS_ENUM(HALT_COP_EVENTS_JTAG, ENABLED));
}
}
NORETURN void ExceptionHandlerImpl(s32 which, u32 lr, u32 svc_lr) {
/* TODO */
*reinterpret_cast<volatile u32 *>(0x40038004) = 0xCAFEBABE;
*reinterpret_cast<volatile u32 *>(0x40038008) = which;
*reinterpret_cast<volatile u32 *>(0x4003800C) = lr;
*reinterpret_cast<volatile u32 *>(0x40038010) = svc_lr;
ErrorStop();
ShowFatalError("Exception: which=%" PRId32 ", lr=%p, svc_lr=%p\n", which, reinterpret_cast<void *>(lr), reinterpret_cast<void *>(svc_lr));
}
}
@ -44,32 +28,39 @@ namespace ams::nxboot {
namespace ams::diag {
NORETURN void AbortImpl(const char *file, int line, const char *func, const char *expr, u64 value, const char *format, ...) {
AMS_UNUSED(file, line, func, expr, value, format);
{
AMS_UNUSED(file, line, func, expr, format);
u32 lr;
__asm__ __volatile__("mov %0, lr" : "=r"(lr) :: "memory");
*reinterpret_cast<volatile u32 *>(0x40038004) = lr;
}
ams::nxboot::ErrorStop();
nxboot::ShowFatalError("Abort called, lr=%p, value=%" PRIx64 "\n", reinterpret_cast<void *>(lr), value);
}
NORETURN void AbortImpl(const char *file, int line, const char *func, const char *expr, u64 value) {
AMS_UNUSED(file, line, func, expr, value);
{
AMS_UNUSED(file, line, func, expr);
u32 lr;
__asm__ __volatile__("mov %0, lr" : "=r"(lr) :: "memory");
*reinterpret_cast<volatile u32 *>(0x40038004) = lr;
}
ams::nxboot::ErrorStop();
nxboot::ShowFatalError("Abort called, lr=%p, value=%" PRIx64 "\n", reinterpret_cast<void *>(lr), value);
}
NORETURN void AbortImpl() {
{
u32 lr;
__asm__ __volatile__("mov %0, lr" : "=r"(lr) :: "memory");
*reinterpret_cast<volatile u32 *>(0x40038004) = lr;
}
ams::nxboot::ErrorStop();
nxboot::ShowFatalError("Abort called, lr=%p\n", reinterpret_cast<void *>(lr));
}
}
namespace ams::result::impl {
NORETURN void OnResultAbort(const char *file, int line, const char *func, const char *expr, Result result) {
::ams::diag::AbortImpl(file, line, func, expr, result.GetValue(), "Result Abort: 2%03" PRId32 "-%04" PRId32 "", result.GetModule(), result.GetDescription());
AMS_INFINITE_LOOP();
__builtin_unreachable();
}
NORETURN void OnResultAbort(Result result) {
OnResultAbort("", 0, "", "", result);
}
}

35
fusee/program/source/fusee_fatal.cpp
View file

@ -15,12 +15,15 @@
*/
#include <exosphere.hpp>
#include "fusee_fatal.hpp"
#include "fusee_external_package.hpp"
#include "fs/fusee_fs_api.hpp"
namespace ams::nxboot {
namespace {
constexpr inline const uintptr_t PMC = secmon::MemoryRegionPhysicalDevicePmc.GetAddress();
Result SaveFatalErrorContext(const ams::impl::FatalErrorContext *ctx) {
/* Create and open the file. */
fs::FileHandle file;
@ -47,6 +50,31 @@ namespace ams::nxboot {
}
NORETURN void RebootToSelf() {
/* Patch SDRAM init to perform an SVC immediately after second write. */
reg::Write(PMC + APBDEV_PMC_SCRATCH45, 0x2E38DFFF);
reg::Write(PMC + APBDEV_PMC_SCRATCH46, 0x6001DC28);
/* Set SVC handler to jump to reboot stub in IRAM. */
reg::Write(PMC + APBDEV_PMC_SCRATCH33, 0x4003F000);
reg::Write(PMC + APBDEV_PMC_SCRATCH40, 0x6000F208);
/* Set boot as warmboot. */
reg::Write(PMC + APBDEV_PMC_SCRATCH0, (1 << 0));
/* Copy reboot stub into high IRAM. */
std::memcpy(reinterpret_cast<void *>(0x4003F000), GetExternalPackage().reboot_stub, sizeof(GetExternalPackage().reboot_stub));
/* Copy our main payload into low IRAM. */
std::memcpy(reinterpret_cast<void *>(0x40010000), GetExternalPackage().fusee, sizeof(GetExternalPackage().fusee));
/* Reboot. */
reg::Write(PMC + APBDEV_PMC_CNTRL, PMC_REG_BITS_ENUM(CNTRL_MAIN_RESET, ENABLE));
/* Wait for the reboot to take. */
AMS_INFINITE_LOOP();
}
void SaveAndShowFatalError() {
/* Get the context (at static location in memory). */
ams::impl::FatalErrorContext *f_ctx = reinterpret_cast<ams::impl::FatalErrorContext *>(0x4003E000);
@ -81,11 +109,16 @@ namespace ams::nxboot {
AMS_INFINITE_LOOP();
}
/* TODO: Reboot to payload. */
/* Reboot to self, if we can. */
if (GetExternalPackage().header.magic == ExternalPackageHeader::Magic) {
RebootToSelf();
} else {
/* Just do a normal reboot. */
pmic::ShutdownSystem(true);
/* Wait for our reboot to complete. */
AMS_INFINITE_LOOP();
}
}
}

4
libraries/libstratosphere/source/result/result_on_assertion.cpp
View file

@ -18,7 +18,7 @@
namespace ams::result::impl {
NORETURN WEAK_SYMBOL void OnResultAbort(const char *file, int line, const char *func, const char *expr, Result result) {
::ams::diag::AbortImpl(file, line, func, expr, result.GetValue(), "Result Abort: %203d-%04d", result.GetModule(), result.GetDescription());
::ams::diag::AbortImpl(file, line, func, expr, result.GetValue(), "Result Abort: 2%03d-%04d", result.GetModule(), result.GetDescription());
AMS_INFINITE_LOOP();
__builtin_unreachable();
}
@ -28,7 +28,7 @@ namespace ams::result::impl {
}
NORETURN WEAK_SYMBOL void OnResultAssertion(const char *file, int line, const char *func, const char *expr, Result result) {
::ams::diag::AssertionFailureImpl(file, line, func, expr, result.GetValue(), "Result Assertion: %203d-%04d", result.GetModule(), result.GetDescription());
::ams::diag::AssertionFailureImpl(file, line, func, expr, result.GetValue(), "Result Assertion: 2%03d-%04d", result.GetModule(), result.GetDescription());
AMS_INFINITE_LOOP();
__builtin_unreachable();
}