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Kernel: Add ability to dump backtrace from provided frame pointer

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When an exception happens it is sometimes hard to figure out where
exactly the exception happened, so use the frame pointer of the trap
frame to print a backtrace.
This commit is contained in:
Timon Kruiper 2022-09-21 14:33:39 +02:00 committed by Andreas Kling
parent 57901a6f62
commit ad5e8bbb4f
3 changed files with 8 additions and 0 deletions
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2
Kernel/Arch/aarch64/init.cpp
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@ -49,6 +49,8 @@ extern "C" void exception_common(Kernel::TrapFrame const* const trap_frame)
auto esr_el1 = Kernel::Aarch64::ESR_EL1::read();
dbgln("esr_el1: EC({:#b}) IL({:#b}) ISS({:#b}) ISS2({:#b})", esr_el1.EC, esr_el1.IL, esr_el1.ISS, esr_el1.ISS2);
dump_backtrace_from_base_pointer(trap_frame->x[29]);
}
Kernel::Processor::halt();

5
Kernel/KSyms.cpp
View file

@ -161,6 +161,11 @@ NEVER_INLINE static void dump_backtrace_impl(FlatPtr base_pointer, bool use_ksym
}
}
void dump_backtrace_from_base_pointer(FlatPtr base_pointer)
{
dump_backtrace_impl(base_pointer, g_kernel_symbols_available, PrintToScreen::Yes);
}
void dump_backtrace(PrintToScreen print_to_screen)
{
static bool in_dump_backtrace = false;

1
Kernel/KSyms.h
View file

@ -29,5 +29,6 @@ extern FlatPtr g_lowest_kernel_symbol_address;
extern FlatPtr g_highest_kernel_symbol_address;
void dump_backtrace(PrintToScreen print_to_screen = PrintToScreen::No);
void dump_backtrace_from_base_pointer(FlatPtr base_pointer);
}