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UserspaceEmulator: Add Emulator::dump_backtrace()

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This gives you a nice, symbolicated backtrace at the current EIP. :^)
This commit is contained in:
Andreas Kling 2020-07-12 19:57:03 +02:00
parent 584923445c
commit ddf7b817df
2 changed files with 21 additions and 0 deletions
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20
DevTools/UserspaceEmulator/Emulator.cpp
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@ -178,6 +178,25 @@ int Emulator::exec()
return m_exit_status; return m_exit_status;
} }
void Emulator::dump_backtrace()
{
u32 offset = 0;
String symbol = m_elf->symbolicate(m_cpu.eip(), &offset);
printf("> %#08x %s +%#x\n", m_cpu.eip(), symbol.characters(), offset);
u32 frame_ptr = m_cpu.ebp();
while (frame_ptr) {
u32 ret_ptr = m_mmu.read32({ 0x20, frame_ptr + 4 });
if (!ret_ptr)
return;
symbol = m_elf->symbolicate(ret_ptr, &offset);
printf("> %#08x %s +%#x\n", ret_ptr, symbol.characters(), offset);
frame_ptr = m_mmu.read32({ 0x20, frame_ptr });
}
}
u32 Emulator::virt_syscall(u32 function, u32 arg1, u32 arg2, u32 arg3) u32 Emulator::virt_syscall(u32 function, u32 arg1, u32 arg2, u32 arg3)
{ {
(void)arg2; (void)arg2;
@ -198,6 +217,7 @@ u32 Emulator::virt_syscall(u32 function, u32 arg1, u32 arg2, u32 arg3)
return 0; return 0;
default: default:
warn() << "Unimplemented syscall!"; warn() << "Unimplemented syscall!";
dump_backtrace();
TODO(); TODO();
} }
} }

1
DevTools/UserspaceEmulator/Emulator.h
View file

@ -40,6 +40,7 @@ public:
explicit Emulator(NonnullRefPtr<ELF::Loader>); explicit Emulator(NonnullRefPtr<ELF::Loader>);
bool load_elf(); bool load_elf();
void dump_backtrace();
int exec(); int exec();
u32 virt_syscall(u32 function, u32 arg1, u32 arg2, u32 arg3); u32 virt_syscall(u32 function, u32 arg1, u32 arg2, u32 arg3);