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Add inline attribute to segment functions #430

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Aug 4, 2023
Merged

Add inline attribute to segment functions #430

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6 changes: 6 additions & 0 deletions src/instructions/segmentation.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@ use core::arch::asm;

macro_rules! get_reg_impl {
($name:literal) => {
#[inline]
fn get_reg() -> SegmentSelector {
let segment: u16;
unsafe {
Expand All @@ -25,6 +26,7 @@ macro_rules! segment_impl {
impl Segment for $type {
get_reg_impl!($name);

#[inline]
unsafe fn set_reg(sel: SegmentSelector) {
unsafe {
asm!(concat!("mov ", $name, ", {0:x}"), in(reg) sel.0, options(nostack, preserves_flags));
Expand All @@ -38,6 +40,7 @@ macro_rules! segment64_impl {
($type:ty, $name:literal, $base:ty) => {
impl Segment64 for $type {
const BASE: Msr = <$base>::MSR;
#[inline]
fn read_base() -> VirtAddr {
unsafe {
let val: u64;
Expand All @@ -46,6 +49,7 @@ macro_rules! segment64_impl {
}
}

#[inline]
unsafe fn write_base(base: VirtAddr) {
unsafe{
asm!(concat!("wr", $name, "base {}"), in(reg) base.as_u64(), options(nostack, preserves_flags));
Expand All @@ -66,6 +70,7 @@ impl Segment for CS {
/// Note we cannot use a "far call" (`lcall`) or "far jmp" (`ljmp`) to do this because then we
/// would only be able to jump to 32-bit instruction pointers. Only Intel implements support
/// for 64-bit far calls/jumps in long-mode, AMD does not.
#[inline]
unsafe fn set_reg(sel: SegmentSelector) {
unsafe {
asm!(
Expand Down Expand Up @@ -97,6 +102,7 @@ impl GS {
///
/// This function is unsafe because the caller must ensure that the
/// swap operation cannot lead to undefined behavior.
#[inline]
pub unsafe fn swap() {
unsafe {
asm!("swapgs", options(nostack, preserves_flags));
Expand Down