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use core::{mem, slice};
use core::ops::{Deref, DerefMut};
use super::error::{Error, Result};
macro_rules! syscall {
($($name:ident($a:ident, $($b:ident, $($c:ident, $($d:ident, $($e:ident, $($f:ident, )?)?)?)?)?);)+) => {
$(
pub unsafe fn $name($a: usize, $($b: usize, $($c: usize, $($d: usize, $($e: usize, $($f: usize)?)?)?)?)?) -> Result<usize> {
let ret: usize;
asm!(
"ecall",
in("a7") $a,
$(
in("a0") $b,
$(
in("a1") $c,
$(
in("a2") $d,
$(
in("a3") $e,
$(
in("a4") $f,
)?
)?
)?
)?
)?
lateout("a0") ret,
options(nostack),
);
Error::demux(ret)
}
)+
};
}
syscall! {
syscall0(a,);
syscall1(a, b,);
syscall2(a, b, c,);
syscall3(a, b, c, d,);
syscall4(a, b, c, d, e,);
syscall5(a, b, c, d, e, f,);
}
#[derive(Copy, Clone, Debug, Default)]
#[repr(C)]
pub struct IntRegisters {
//TODO
}
impl Deref for IntRegisters {
type Target = [u8];
fn deref(&self) -> &[u8] {
unsafe {
slice::from_raw_parts(self as *const IntRegisters as *const u8, mem::size_of::<IntRegisters>())
}
}
}
impl DerefMut for IntRegisters {
fn deref_mut(&mut self) -> &mut [u8] {
unsafe {
slice::from_raw_parts_mut(self as *mut IntRegisters as *mut u8, mem::size_of::<IntRegisters>())
}
}
}
#[derive(Clone, Copy, Debug, Default)]
#[repr(packed)]
pub struct FloatRegisters {
//TODO
}
impl Deref for FloatRegisters {
type Target = [u8];
fn deref(&self) -> &[u8] {
unsafe {
slice::from_raw_parts(self as *const FloatRegisters as *const u8, mem::size_of::<FloatRegisters>())
}
}
}
impl DerefMut for FloatRegisters {
fn deref_mut(&mut self) -> &mut [u8] {
unsafe {
slice::from_raw_parts_mut(self as *mut FloatRegisters as *mut u8, mem::size_of::<FloatRegisters>())
}
}
}
|
