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x64: Dump some important registers on an unsupported exception #138

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Dec 19, 2021
Merged

x64: Dump some important registers on an unsupported exception #138

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59 changes: 39 additions & 20 deletions runtime/x64/interrupt.rs
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Original file line number Diff line number Diff line change
@@ -1,5 +1,7 @@
use crate::{address::UserVAddr, handler};

use core::fmt;

use super::{apic::ack_interrupt, ioapic::VECTOR_IRQ_BASE, serial::SERIAL0_IRQ, PageFaultReason};
use x86::{
controlregs::cr2,
Expand All @@ -8,7 +10,7 @@ use x86::{
};

/// The interrupt stack frame.
#[derive(Debug, Copy, Clone)]
#[derive(Copy, Clone)]
#[repr(C, packed)]
struct InterruptFrame {
rax: u64,
Expand All @@ -34,6 +36,17 @@ struct InterruptFrame {
ss: u64,
}

impl fmt::Debug for InterruptFrame {
#[allow(unaligned_references)]
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(
f,
"RIP={:x}, RSP={:x}, CS={:x}, ERR={:x}",
self.rip, self.rsp, self.cs, self.error
)
}
}

extern "C" {
fn usercopy1();
fn usercopy2();
Expand Down Expand Up @@ -82,59 +95,65 @@ unsafe extern "C" fn x64_handle_interrupt(vec: u8, frame: *const InterruptFrame)
}
DIVIDE_ERROR_VECTOR => {
// TODO:
todo!("unsupported exception: DIVIDE_ERROR");
panic!("unsupported exception: DIVIDE_ERROR\n{:?}", frame);
}
DEBUG_VECTOR => {
// TODO:
todo!("unsupported exception: DEBUG");
panic!("unsupported exception: DEBUG\n{:?}", frame);
}
NONMASKABLE_INTERRUPT_VECTOR => {
// TODO:
todo!("unsupported exception: NONMASKABLE_INTERRUPT");
panic!("unsupported exception: NONMASKABLE_INTERRUPT\n{:?}", frame);
}
BREAKPOINT_VECTOR => {
// TODO:
todo!("unsupported exception: BREAKPOINT");
panic!("unsupported exception: BREAKPOINT\n{:?}", frame);
}
OVERFLOW_VECTOR => {
// TODO:
todo!("unsupported exception: OVERFLOW");
panic!("unsupported exception: OVERFLOW\n{:?}", frame);
}
BOUND_RANGE_EXCEEDED_VECTOR => {
// TODO:
todo!("unsupported exception: BOUND_RANGE_EXCEEDED");
panic!("unsupported exception: BOUND_RANGE_EXCEEDED\n{:?}", frame);
}
INVALID_OPCODE_VECTOR => {
// TODO:
todo!("unsupported exception: INVALID_OPCODE");
panic!("unsupported exception: INVALID_OPCODE\n{:?}", frame);
}
DEVICE_NOT_AVAILABLE_VECTOR => {
// TODO:
todo!("unsupported exception: DEVICE_NOT_AVAILABLE");
panic!("unsupported exception: DEVICE_NOT_AVAILABLE\n{:?}", frame);
}
DOUBLE_FAULT_VECTOR => {
// TODO:
todo!("unsupported exception: DOUBLE_FAULT");
panic!("unsupported exception: DOUBLE_FAULT\n{:?}", frame);
}
COPROCESSOR_SEGMENT_OVERRUN_VECTOR => {
// TODO:
todo!("unsupported exception: COPROCESSOR_SEGMENT_OVERRUN");
panic!(
"unsupported exception: COPROCESSOR_SEGMENT_OVERRUN\n{:?}",
frame
);
}
INVALID_TSS_VECTOR => {
// TODO:
todo!("unsupported exception: INVALID_TSS");
panic!("unsupported exception: INVALID_TSS\n{:?}", frame);
}
SEGMENT_NOT_PRESENT_VECTOR => {
// TODO:
todo!("unsupported exception: SEGMENT_NOT_PRESENT");
panic!("unsupported exception: SEGMENT_NOT_PRESENT\n{:?}", frame);
}
STACK_SEGEMENT_FAULT_VECTOR => {
// TODO:
todo!("unsupported exception: STACK_SEGEMENT_FAULT");
panic!("unsupported exception: STACK_SEGEMENT_FAULT\n{:?}", frame);
}
GENERAL_PROTECTION_FAULT_VECTOR => {
// TODO:
todo!("unsupported exception: GENERAL_PROTECTION_FAULT");
panic!(
"unsupported exception: GENERAL_PROTECTION_FAULT\n{:?}",
frame
);
}
PAGE_FAULT_VECTOR => {
let reason = PageFaultReason::from_bits_truncate(frame.error as u32);
Expand All @@ -159,23 +178,23 @@ unsafe extern "C" fn x64_handle_interrupt(vec: u8, frame: *const InterruptFrame)
}
X87_FPU_VECTOR => {
// TODO:
todo!("unsupported exception: X87_FPU");
panic!("unsupported exception: X87_FPU\n{:?}", frame);
}
ALIGNMENT_CHECK_VECTOR => {
// TODO:
todo!("unsupported exception: ALIGNMENT_CHECK");
panic!("unsupported exception: ALIGNMENT_CHECK\n{:?}", frame);
}
MACHINE_CHECK_VECTOR => {
// TODO:
todo!("unsupported exception: MACHINE_CHECK");
panic!("unsupported exception: MACHINE_CHECK\n{:?}", frame);
}
SIMD_FLOATING_POINT_VECTOR => {
// TODO:
todo!("unsupported exception: SIMD_FLOATING_POINT");
panic!("unsupported exception: SIMD_FLOATING_POINT\n{:?}", frame);
}
VIRTUALIZATION_VECTOR => {
// TODO:
todo!("unsupported exception: VIRTUALIZATION");
panic!("unsupported exception: VIRTUALIZATION\n{:?}", frame);
}
_ => {
panic!("unexpected interrupt: vec={}", vec);
Expand Down