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#![feature(ptr_internals)]
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#![feature(lang_items)]
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#![feature(const_fn)]
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#![feature(alloc)]
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#![feature(const_unique_new, const_atomic_usize_new)]
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#![feature(unique)]
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#![feature(allocator_api)]
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#![feature(global_allocator)]
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#![feature(abi_x86_interrupt)]
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#![feature(iterator_step_by)]
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#![feature(unboxed_closures)]
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#![feature(naked_functions)]
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#![feature(asm)]
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#![no_std]
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#[macro_use]
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extern crate alloc;
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extern crate rlibc;
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extern crate volatile;
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extern crate spin;
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extern crate multiboot2;
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#[macro_use]
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extern crate bitflags;
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#[macro_use]
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extern crate x86_64;
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#[macro_use]
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extern crate once;
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extern crate linked_list_allocator;
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#[macro_use]
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extern crate lazy_static;
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extern crate bit_field;
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extern crate syscall;
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#[macro_use] // print!
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mod io;
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mod memory;
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mod lang;
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mod util;
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#[macro_use]
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mod macros;
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mod consts;
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mod process;
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#[allow(dead_code)]
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#[cfg(target_arch = "x86_64")]
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#[path = "arch/x86_64/mod.rs"]
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mod arch;
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// The entry point of Rust kernel
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#[no_mangle]
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pub extern "C" fn rust_main(multiboot_information_address: usize) -> ! {
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arch::cpu::init();
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// ATTENTION: we have a very small stack and no guard page
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println!("Hello World{}", "!");
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let boot_info = unsafe { multiboot2::load(multiboot_information_address) };
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// set up guard page and map the heap pages
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let mut memory_controller = memory::init(boot_info);
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unsafe {
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use consts::{KERNEL_HEAP_OFFSET, KERNEL_HEAP_SIZE};
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HEAP_ALLOCATOR.lock().init(KERNEL_HEAP_OFFSET, KERNEL_HEAP_SIZE);
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}
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arch::gdt::init();
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arch::idt::init();
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test!(global_allocator);
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test!(guard_page);
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test!(find_mp);
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let acpi = arch::driver::init(
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|addr: usize| memory_controller.map_page_identity(addr));
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// memory_controller.print_page_table();
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// FIXME: 开启SMP后，导致switch_to_user中设置rsp无效
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// arch::smp::start_other_cores(&acpi, &mut memory_controller);
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process::init(&mut memory_controller);
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unsafe{ arch::interrupt::enable(); }
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unsafe{
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use arch::syscall;
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// 在用户模式下触发时钟中断，会导致GPF
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// （可能是由于没有合理分离栈）
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no_interrupt!({
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syscall::switch_to_user();
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println!("Now in user mode");
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syscall::switch_to_kernel();
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println!("Now in kernel mode");
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});
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}
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loop{
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println!("init ...");
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let mut i = 0;
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while i < 1 << 22 {
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i += 1;
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}
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}
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test_end!();
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unreachable!();
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}
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#[no_mangle]
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pub extern "C" fn other_main() -> ! {
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arch::cpu::init();
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arch::gdt::init();
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arch::idt::init();
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arch::driver::apic::other_init();
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let cpu_id = arch::driver::apic::lapic_id();
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println!("Hello world! from CPU {}!", arch::driver::apic::lapic_id());
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unsafe{ arch::smp::notify_started(cpu_id); }
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// unsafe{ let a = *(0xdeadbeaf as *const u8); } // Page fault
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loop {}
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}
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use linked_list_allocator::LockedHeap;
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#[global_allocator]
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static HEAP_ALLOCATOR: LockedHeap = LockedHeap::empty();
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mod test {
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pub fn global_allocator() {
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for i in 0..10000 {
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format!("Some String");
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}
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}
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pub fn find_mp() {
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use arch;
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let mp = arch::driver::mp::find_mp();
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assert!(mp.is_some());
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}
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pub fn guard_page() {
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use x86_64;
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// invoke a breakpoint exception
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x86_64::instructions::interrupts::int3();
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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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}
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// trigger a stack overflow
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stack_overflow();
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println!("It did not crash!");
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}
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} |
