Trying out proposed inline asm syntax

interrupts.rs

pub unsafe extern "C" fn irq0() {
    asm!{
        "
        push %rax
        movq $0, %rax
        ",
        // No inputs
        // No outputs
        clobber("rax", "rsp")
    };

    irq_common()
}

#[naked]
#[inline]
unsafe fn irq_common() -> ! {

    let irq: usize;
    let context_ptr: *mut IrqContext;

    // Save all registers
    asm!{
        "
        push %rbx
        push %rcx
        push %rdx
        push %rsi
        push %rdi
        push %rbp
        push %r8
        push %r9
        push %r10
        push %r11
        push %r12
        push %r13
        push %r14
        push %r15
        mov %cr2, %rbp
        push %rbp
        mov %rsp, {ctxp}
        mov %rax, {irq_num}
        ",
        // No inputs
        ctxp = out(reg) context_ptr,
        irq_num = out(reg) irq,
        clobber("rbp", "rax", "rsp"),
    };

    // Handle interrupt
    pic_irq(irq, &mut *context_ptr);

    // Pop arguments and iretq
    asm!{
        "
        pop %rbp
        mov %rbp, %cr2
        pop %r15
        pop %r14
        pop %r13
        pop %r12
        pop %r11
        pop %r10
        pop %r9
        pop %r8
        pop %rbp
        pop %rdi
        pop %rsi
        pop %rdx
        pop %rcx
        pop %rbx
        pop %rax
        iretq
        ",
        // No inputs
        // No outputs
        clobber("rax", "rbx", "rcx", "rdx", "rsi", "rdi", "rbp", "rsp", "r8",
                "r9", "r10", "r11", "r12", "r13", "r14", "r15"),
        flags("volatile") // Changes %cr2 and does iretq
    };

    panic!("Should never get here!");
}