l3-ENSL/dendrobates-t-azureus
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Use entry_point! to typecheck the entry point and get the boot info.

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This commit is contained in:
Guillaume DIDIER 2019-11-04 14:48:49 +01:00
parent f4cc148d83
commit 3d5cebdab4
1 changed files with 14 additions and 2 deletions
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16
src/main.rs
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@ -17,6 +17,8 @@ use vga_buffer; // required for custom panic handler
use dendrobates_tinctoreus_azureus::hlt_loop; use dendrobates_tinctoreus_azureus::hlt_loop;
use x86_64; use x86_64;
use bootloader::BootInfo;
// Custom panic handler, required for freestanding program // Custom panic handler, required for freestanding program
#[cfg(not(test))] #[cfg(not(test))]
#[panic_handler] #[panic_handler]
@ -28,9 +30,10 @@ fn panic(info: &PanicInfo) -> ! {
hlt_loop(); hlt_loop();
} }
entry_point!(kernel_main);
// Kernel entry point // Kernel entry point
#[no_mangle] pub extern "C" fn kernal_main(boot_info: &'static BootInfo) -> ! {
pub extern "C" fn _start() -> ! {
// TODO: Take care of cpuid stuff and set-up all floating point exetnsions // TODO: Take care of cpuid stuff and set-up all floating point exetnsions
// TODO: We may also need to enable debug registers ? // TODO: We may also need to enable debug registers ?
@ -44,6 +47,15 @@ pub extern "C" fn _start() -> ! {
x86_64::instructions::interrupts::int3(); x86_64::instructions::interrupts::int3();
use x86_64::registers::control::Cr3;
let (level_4_page_table, flags) = Cr3::read();
println!(
"Level 4 page table at: {:?}, flags {:?}",
level_4_page_table.start_address(),
flags
);
unsafe { unsafe {
*(0xdeadbeef as *mut u64) = 42; *(0xdeadbeef as *mut u64) = 42;
} }