Update calling convention syntax

src/kernel/arch/x86/boot.zig

@@ -66,7 +66,7 @@ export var kernel_stack: [16 * 1024]u8 align(16) linksection(".bss.stack") = und
 
 extern fn kmain() void;
 
-export nakedcc fn _start() align(16) linksection(".text.boot") noreturn {
+export fn _start() align(16) linksection(".text.boot") callconv(.Naked) noreturn {
     // Set the page directory to the boot directory
     asm volatile (
         \\.extern boot_page_directory
@@ -91,7 +91,7 @@ export nakedcc fn _start() align(16) linksection(".text.boot") noreturn {
     while (true) {}
 }
 
-export nakedcc fn start_higher_half() noreturn {
+export fn start_higher_half() callconv(.Naked) noreturn {
     // Invalidate the page for the first 4MiB as it's no longer needed
     asm volatile ("invlpg (0)");
 

src/kernel/arch/x86/idt.zig

@@ -48,7 +48,7 @@ pub const IdtPtr = packed struct {
     base: u32,
 };
 
-pub const InterruptHandler = nakedcc fn () void;
+pub const InterruptHandler = fn () callconv(.Naked) void;
 
 /// The error set for the IDT
 pub const IdtError = error{
@@ -189,8 +189,8 @@ pub fn init() void {
     if (build_options.rt_test) runtimeTests();
 }
 
-nakedcc fn testHandler0() void {}
-nakedcc fn testHandler1() void {}
+fn testHandler0() callconv(.Naked) void {}
+fn testHandler1() callconv(.Naked) void {}
 
 fn mock_lidt(ptr: *const IdtPtr) void {
     expectEqual(TABLE_SIZE, ptr.limit);

src/kernel/arch/x86/interrupts.zig

@@ -25,7 +25,7 @@ export fn handler(ctx: *arch.InterruptContext) void {
 ///
 /// The common assembly that all exceptions and interrupts will call.
 ///
-export nakedcc fn commonStub() void {
+export fn commonStub() callconv(.Naked) void {
     asm volatile (
         \\pusha
         \\push  %%ds
@@ -63,7 +63,7 @@ export nakedcc fn commonStub() void {
 ///
 pub fn getInterruptStub(comptime interrupt_num: u32) idt.InterruptHandler {
     return struct {
-        nakedcc fn func() void {
+        fn func() callconv(.Naked) void {
             asm volatile (
                 \\ cli
             );

src/kernel/arch/x86/irq.zig

@@ -140,7 +140,7 @@ pub fn init() void {
     if (build_options.rt_test) runtimeTests();
 }
 
-nakedcc fn testFunction0() void {}
+fn testFunction0() callconv(.Naked) void {}
 fn testFunction1(ctx: *arch.InterruptContext) void {}
 fn testFunction2(ctx: *arch.InterruptContext) void {}
 

src/kernel/arch/x86/isr.zig

@@ -248,7 +248,7 @@ pub fn init() void {
     if (build_options.rt_test) runtimeTests();
 }
 
-nakedcc fn testFunction0() void {}
+fn testFunction0() callconv(.Naked) void {}
 fn testFunction1(ctx: *arch.InterruptContext) void {}
 fn testFunction2(ctx: *arch.InterruptContext) void {}
 fn testFunction3(ctx: *arch.InterruptContext) void {}