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