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kern: print backtrace on panic

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This commit is contained in:
Michael Scire 2020-02-07 06:26:01 -08:00
parent cb6af379d8
commit 8cfffc69d5
7 changed files with 106 additions and 14 deletions
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45
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_cpu.hpp
View file

@ -59,6 +59,51 @@ namespace ams::kern::arm64::cpu {
EnsureInstructionConsistency();
}
/* Helper for address access. */
ALWAYS_INLINE bool GetPhysicalAddressWritable(KPhysicalAddress *out, KVirtualAddress addr, bool privileged = false) {
const uintptr_t va = GetInteger(addr);
if (privileged) {
__asm__ __volatile__("at s1e1w, %[va]" :: [va]"r"(va) : "memory");
} else {
__asm__ __volatile__("at s1e0w, %[va]" :: [va]"r"(va) : "memory");
}
InstructionMemoryBarrier();
u64 par = GetParEl1();
if (par & 0x1) {
return false;
}
if (out) {
*out = KPhysicalAddress((par & 0xFFFFFFFFF000ull) | (va & 0xFFFull));
}
return true;
}
ALWAYS_INLINE bool GetPhysicalAddressReadable(KPhysicalAddress *out, KVirtualAddress addr, bool privileged = false) {
const uintptr_t va = GetInteger(addr);
if (privileged) {
__asm__ __volatile__("at s1e1r, %[va]" :: [va]"r"(va) : "memory");
} else {
__asm__ __volatile__("at s1e0r, %[va]" :: [va]"r"(va) : "memory");
}
InstructionMemoryBarrier();
u64 par = GetParEl1();
if (par & 0x1) {
return false;
}
if (out) {
*out = KPhysicalAddress((par & 0xFFFFFFFFF000ull) | (va & 0xFFFull));
}
return true;
}
/* Synchronization helpers. */
NOINLINE void SynchronizeAllCores();

2
libraries/libmesosphere/include/mesosphere/arch/arm64/kern_cpu_system_registers.hpp
View file

@ -43,6 +43,8 @@ namespace ams::kern::arm64::cpu {
MESOSPHERE_CPU_DEFINE_SYSREG_ACCESSORS(VbarEl1, vbar_el1)
MESOSPHERE_CPU_DEFINE_SYSREG_ACCESSORS(ParEl1, par_el1)
MESOSPHERE_CPU_DEFINE_SYSREG_ACCESSORS(SctlrEl1, sctlr_el1)
MESOSPHERE_CPU_DEFINE_SYSREG_ACCESSORS(CpuActlrEl1, s3_1_c15_c2_0)

2
libraries/libmesosphere/include/mesosphere/kern_debug_log.hpp
View file

@ -24,7 +24,7 @@ namespace ams::kern {
public:
static NOINLINE void Initialize();
static NOINLINE void Printf(const char *format, ...);
static NOINLINE void Printf(const char *format, ...) __attribute__((format(printf, 1, 2)));
static NOINLINE void VPrintf(const char *format, ::std::va_list vl);
};

11
libraries/libmesosphere/include/mesosphere/kern_panic.hpp
View file

@ -19,7 +19,7 @@
namespace ams::kern {
NORETURN void Panic(const char *file, int line, const char *format, ...);
NORETURN void Panic(const char *file, int line, const char *format, ...) __attribute__((format(printf, 3, 4)));
NORETURN void Panic();
}
@ -33,7 +33,8 @@ namespace ams::kern {
#ifdef MESOSPHERE_ENABLE_ASSERTIONS
#define MESOSPHERE_ASSERT_IMPL(expr, ...) \
({ \
if (AMS_UNLIKELY(!(expr))) { \
const bool __tmp_meso_assert_val = (expr); \
if (AMS_UNLIKELY(!__tmp_meso_assert_val)) { \
MESOSPHERE_PANIC(__VA_ARGS__); \
} \
})
@ -56,14 +57,16 @@ namespace ams::kern {
#define MESOSPHERE_ABORT_UNLESS(expr) \
({ \
if (AMS_UNLIKELY(!(expr))) { \
const bool _tmp_meso_assert_val = (expr); \
if (AMS_UNLIKELY(!_tmp_meso_assert_val)) { \
MESOSPHERE_PANIC("Abort(): %s", #expr); \
} \
})
#define MESOSPHERE_INIT_ABORT_UNLESS(expr) \
({ \
if (AMS_UNLIKELY(!(expr))) { \
const bool __tmp_meso_assert_val = (expr); \
if (AMS_UNLIKELY(!__tmp_meso_assert_val)) { \
MESOSPHERE_INIT_ABORT(); \
} \
})

3
libraries/libmesosphere/source/init/kern_init_slab_setup.cpp
View file

@ -201,8 +201,7 @@ namespace ams::kern::init {
case KSlabType_KThread:
address = InitializeSlabHeap<KThread>(address, SLAB_COUNT(KThread));
break;
default:
MESOSPHERE_ABORT();
MESOSPHERE_UNREACHABLE_DEFAULT_CASE();
}
}
}

4
libraries/libmesosphere/source/kern_k_thread.cpp
View file

@ -50,8 +50,8 @@ namespace ams::kern {
[[fallthrough]];
case ThreadType_User:
{
MESOSPHERE_ASSERT((owner == nullptr) || (owner->GetCoreMask() | (1ul << core)) == owner->GetCoreMask());
MESOSPHERE_ASSERT((owner == nullptr) || (owner->GetPriorityMask() | (1ul << prio)) == owner->GetPriorityMask());
MESOSPHERE_ASSERT(((owner == nullptr) || (owner->GetCoreMask() | (1ul << core)) == owner->GetCoreMask()));
MESOSPHERE_ASSERT(((owner == nullptr) || (owner->GetPriorityMask() | (1ul << prio)) == owner->GetPriorityMask()));
}
break;
default:

45
libraries/libmesosphere/source/kern_panic.cpp
View file

@ -15,6 +15,8 @@
*/
#include <mesosphere.hpp>
extern "C" void _start();
namespace ams::result::impl {
NORETURN void OnResultAssertion(Result result) {
@ -27,14 +29,55 @@ namespace ams::kern {
namespace {
size_t g_panic_count = 0;
[[gnu::unused]] void PrintCurrentState() {
if (g_panic_count == 1) {
g_panic_count++;
MESOSPHERE_RELEASE_LOG("Base Address: %p\n", _start);
/* TODO: Dump register state. */
#ifdef ATMOSPHERE_ARCH_ARM64
MESOSPHERE_RELEASE_LOG("Backtrace:\n");
uintptr_t fp = reinterpret_cast<uintptr_t>(__builtin_frame_address(0));
for (size_t i = 0; i < 32 && fp && util::IsAligned(fp, 0x10) && cpu::GetPhysicalAddressWritable(nullptr, fp, true); i++) {
struct {
uintptr_t fp;
uintptr_t lr;
} *stack_frame = reinterpret_cast<decltype(stack_frame)>(fp);
MESOSPHERE_RELEASE_LOG(" [%02zx]: %p\n", i, reinterpret_cast<void *>(stack_frame->lr));
fp = stack_frame->fp;
}
#endif
}
}
NORETURN void StopSystem() {
#ifdef MESOSPHERE_BUILD_FOR_DEBUGGING
PrintCurrentState();
#endif
KSystemControl::StopSystem();
}
}
NORETURN WEAK_SYMBOL void Panic(const char *file, int line, const char *format, ...) {
/* TODO: Implement printing, log this information. */
#ifdef MESOSPHERE_BUILD_FOR_DEBUGGING
if (g_panic_count == 0) {
g_panic_count++;
::std::va_list vl;
va_start(vl, format);
MESOSPHERE_RELEASE_LOG("KernelPanic (Core %d): %s:%d\n", GetCurrentCoreId(), file, line);
MESOSPHERE_RELEASE_VLOG(format, vl);
MESOSPHERE_RELEASE_LOG("\n");
va_end(vl);
}
#endif
StopSystem();
}