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cheaty way of setting the frame pointer

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Folkert 2023-09-16 12:20:50 +02:00
parent 0259c11565
commit 8021f3809c
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1 changed files with 13 additions and 1 deletions
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14
crates/compiler/gen_dev/src/generic64/aarch64.rs
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@ -370,23 +370,35 @@ impl CallConv<AArch64GeneralReg, AArch64FloatReg, AArch64Assembler> for AArch64C
Some(size) => size,
_ => internal_error!("Ran out of stack space"),
};
let alignment = if full_stack_size <= 0 {
0
} else {
full_stack_size % STACK_ALIGNMENT as i32
};
let offset = if alignment == 0 {
0
} else {
STACK_ALIGNMENT - alignment as u8
};
if let Some(aligned_stack_size) = full_stack_size.checked_add(offset as i32) {
if aligned_stack_size > 0 {
AArch64Assembler::mov_reg64_reg64(
// // mov x29, sp
// AArch64Assembler::mov_reg64_reg64(
// buf,
// AArch64GeneralReg::FP,
// AArch64GeneralReg::ZRSP,
// );
AArch64Assembler::sub_reg64_reg64_imm32(
buf,
AArch64GeneralReg::FP,
AArch64GeneralReg::ZRSP,
0,
);
// sub sp, sp, #0x10
AArch64Assembler::sub_reg64_reg64_imm32(
buf,
AArch64GeneralReg::ZRSP,