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Only save preserved regs in aarch64 context switch

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This commit is contained in:
Jeremy Soller
2022-08-25 18:23:51 -06:00
parent 52434b359c
commit 82ac7a66f7
1 changed files with 0 additions and 77 deletions
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77
src/context/arch/aarch64.rs
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@@ -44,17 +44,6 @@ pub struct Context {
x21: usize, /* Callee saved Register */
x20: usize, /* Callee saved Register */
x19: usize, /* Callee saved Register */
x18: usize,
x17: usize,
x16: usize,
x15: usize, /* Temporary Register */
x14: usize, /* Temporary Register */
x13: usize, /* Temporary Register */
x12: usize, /* Temporary Register */
x11: usize, /* Temporary Register */
x10: usize, /* Temporary Register */
x9: usize, /* Temporary Register */
x8: usize, /* Indirect location Register */
}
impl Context {
@@ -80,17 +69,6 @@ impl Context {
x21: 0,
x20: 0,
x19: 0,
x18: 0,
x17: 0,
x16: 0,
x15: 0,
x14: 0,
x13: 0,
x12: 0,
x11: 0,
x10: 0,
x9: 0,
x8: 0,
}
}
@@ -154,17 +132,6 @@ impl Context {
println!("x21: 0x{:016x}", self.x21);
println!("x20: 0x{:016x}", self.x20);
println!("x19: 0x{:016x}", self.x19);
println!("x18: 0x{:016x}", self.x18);
println!("x17: 0x{:016x}", self.x17);
println!("x16: 0x{:016x}", self.x16);
println!("x15: 0x{:016x}", self.x15);
println!("x14: 0x{:016x}", self.x14);
println!("x13: 0x{:016x}", self.x13);
println!("x12: 0x{:016x}", self.x12);
println!("x11: 0x{:016x}", self.x11);
println!("x10: 0x{:016x}", self.x10);
println!("x9: 0x{:016x}", self.x9);
println!("x8: 0x{:016x}", self.x8);
}
}
@@ -280,39 +247,6 @@ pub unsafe fn switch_to(prev: &mut super::Context, next: &mut super::Context) {
unsafe extern "C" fn switch_to_inner(_prev: &mut Context, _next: &mut Context) {
core::arch::asm!(
"
str x8, [x0, #{off_x8}]
ldr x8, [x1, #{off_x8}]
str x9, [x0, #{off_x9}]
ldr x9, [x1, #{off_x9}]
str x10, [x0, #{off_x10}]
ldr x10, [x1, #{off_x10}]
str x11, [x0, #{off_x11}]
ldr x11, [x1, #{off_x11}]
str x12, [x0, #{off_x12}]
ldr x12, [x1, #{off_x12}]
str x13, [x0, #{off_x13}]
ldr x13, [x1, #{off_x13}]
str x14, [x0, #{off_x14}]
ldr x14, [x1, #{off_x14}]
str x15, [x0, #{off_x15}]
ldr x15, [x1, #{off_x15}]
str x16, [x0, #{off_x16}]
ldr x16, [x1, #{off_x16}]
str x17, [x0, #{off_x17}]
ldr x17, [x1, #{off_x17}]
str x18, [x0, #{off_x18}]
ldr x18, [x1, #{off_x18}]
str x19, [x0, #{off_x19}]
ldr x19, [x1, #{off_x19}]
@@ -386,17 +320,6 @@ unsafe extern "C" fn switch_to_inner(_prev: &mut Context, _next: &mut Context) {
b {switch_hook}
",
off_x8 = const(offset_of!(Context, x8)),
off_x9 = const(offset_of!(Context, x9)),
off_x10 = const(offset_of!(Context, x10)),
off_x11 = const(offset_of!(Context, x11)),
off_x12 = const(offset_of!(Context, x12)),
off_x13 = const(offset_of!(Context, x13)),
off_x14 = const(offset_of!(Context, x14)),
off_x15 = const(offset_of!(Context, x15)),
off_x16 = const(offset_of!(Context, x16)),
off_x17 = const(offset_of!(Context, x17)),
off_x18 = const(offset_of!(Context, x18)),
off_x19 = const(offset_of!(Context, x19)),
off_x20 = const(offset_of!(Context, x20)),
off_x21 = const(offset_of!(Context, x21)),