fn main() {
unsafe {
let foo = 1;
let mut o = 0;
core::arch::asm!(
"%input = OpLoad _ {0}",
concat!("%result = ", "bar", " _ %input"),
"OpStore {1} %result",
in(reg) &foo,
in(reg) &mut o,
);
let thread_id: usize;
core::arch::asm!("
mov {0}, gs:[0x30]
mov {0}, [{0}+0x48]
", out(reg) thread_id, options(pure, readonly, nostack));
static UNMAP_BASE: usize;
const MEM_RELEASE: usize;
static VirtualFree: usize;
const OffPtr: usize;
const OffFn: usize;
core::arch::asm!("
push {free_type}
push {free_size}
push {base}
mov eax, fs:[30h]
mov eax, [eax+8h]
add eax, {off_fn}
mov [eax-{off_fn}+{off_ptr}], eax
push eax
jmp {virtual_free}
",
off_ptr = const OffPtr,
off_fn = const OffFn,
free_size = const 0,
free_type = const MEM_RELEASE,
virtual_free = sym VirtualFree,
base = sym UNMAP_BASE,
options(noreturn),
);
}
}
#[inline]
pub unsafe fn bootstrap(msp: *const u32, rv: *const u32) -> ! {
let rv = (rv as u32) | 1;
let msp = msp as u32;
core::arch::asm!(
"mrs {tmp}, CONTROL",
"bics {tmp}, {spsel}",
"msr CONTROL, {tmp}",
"isb",
"msr MSP, {msp}",
"bx {rv}",
tmp = in(reg) 0,
spsel = in(reg) 2,
msp = in(reg) msp,
rv = in(reg) rv,
options(noreturn, nomem, nostack),
);
}