style: change x86 inline asm from AT&T syntax to intel

hal-x86_64/src/cpu.rs

@@ -1,5 +1,5 @@
-use core::mem;
 use core::fmt;
+use core::mem;
 
 #[repr(transparent)]
 pub struct Port {
@@ -21,12 +21,12 @@ impl Port {
 
     pub unsafe fn readb(&self) -> u8 {
         let result: u8;
-        asm!("inb %dx, %al" : "={al}"(result) : "{dx}"(self.num) :: "volatile");
+        asm!("in al, dx" : "={al}"(result) : "{dx}"(self.num) :: "volatile", "intel");
         result
     }
 
     pub unsafe fn writeb(&self, value: u8) {
-        asm!("outb %al, %dx" :: "{dx}"(self.num), "{al}"(value) :: "volatile");
+        asm!("out dx, al" :: "{dx}"(self.num), "{al}"(value) :: "volatile", "intel");
     }
     // TODO(ixi): anything wider than a byte lol
 }

hal-x86_64/src/interrupt/idt.rs

@@ -184,7 +184,7 @@ impl Idt {
 
     pub fn load(&'static self) {
         let ptr = crate::cpu::DtablePtr::new(self);
-        unsafe { asm!("lidt ($0)" :: "r" (&ptr) : "memory") }
+        unsafe { asm!("lidt [$0]" :: "r" (&ptr) : "memory" : "intel") }
     }
 }
 

hal-x86_64/src/segment.rs

@@ -7,7 +7,7 @@ pub struct Selector(u16);
 /// Returns the current code segment selector in `%cs`.
 pub fn code_segment() -> Selector {
     let value: u16;
-    unsafe { asm!("mov %cs, $0" : "=r" (value)) };
+    unsafe { asm!("mov $0, cs"  : "=r" (value) ::: "intel") };
     Selector(value)
 }
 

src/arch/x86_64.rs

@@ -149,6 +149,7 @@ pub fn oops(cause: &dyn core::fmt::Display) -> ! {
     vga.set_color(vga::ColorSpec::new(vga::Color::Red, vga::Color::White));
     let _ = vga.write_str("OOPSIE WOOPSIE");
     vga.set_color(RED_BG);
+
     let _ = writeln!(vga, "\n  uwu we did a widdle fucky-wucky!\n{}", cause);
     let _ = vga.write_str("\n  it will never be safe to turn off your computer.");