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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/source/kern_panic.cpp
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@ -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();
}