60 lines
1.4 KiB
Rust
60 lines
1.4 KiB
Rust
#![no_std]
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#![no_main]
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#![feature(abi_x86_interrupt)]
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use core::panic::PanicInfo;
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use rust_os::serial_print;
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use lazy_static::lazy_static;
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use x86_64::structures::idt::InterruptDescriptorTable;
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use rust_os::{exit_qemu, QemuExitCode, serial_println};
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use x86_64::structures::idt::InterruptStackFrame;
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#[no_mangle]
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pub extern "C" fn _start() -> ! {
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serial_print!("stack_overflow::stack_overflow...\t");
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rust_os::gdt::init();
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init_test_idt();
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// trigger a stack overflow
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stack_overflow();
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panic!("Execution continued after stack overflow");
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}
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#[allow(unconditional_recursion)]
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fn stack_overflow() {
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stack_overflow(); // for each recursion, the return address is pushed
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volatile::Volatile::new(0).read(); // prevent tail recursion optimizations
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}
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#[panic_handler]
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fn panic(info: &PanicInfo) -> ! {
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rust_os::test_panic_handler(info)
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}
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lazy_static! {
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static ref TEST_IDT: InterruptDescriptorTable = {
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let mut idt = InterruptDescriptorTable::new();
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unsafe {
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idt.double_fault
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.set_handler_fn(test_double_fault_handler)
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.set_stack_index(rust_os::gdt::DOUBLE_FAULT_IST_INDEX);
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}
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idt
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};
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}
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pub fn init_test_idt() {
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TEST_IDT.load();
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}
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extern "x86-interrupt" fn test_double_fault_handler(
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_stack_frame: InterruptStackFrame,
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_error_code: u64,
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) -> ! {
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serial_println!("[ok]");
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exit_qemu(QemuExitCode::Success);
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loop {}
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} |