Enum UnwindRuleAarch64

pub enum UnwindRuleAarch64 {
    NoOp,
    NoOpIfFirstFrameOtherwiseFp,
    OffsetSp {
        sp_offset_by_16: u16,
    },
    OffsetSpIfFirstFrameOtherwiseStackEndsHere {
        sp_offset_by_16: u16,
    },
    OffsetSpAndRestoreLr {
        sp_offset_by_16: u16,
        lr_storage_offset_from_sp_by_8: i16,
    },
    OffsetSpAndRestoreFpAndLr {
        sp_offset_by_16: u16,
        fp_storage_offset_from_sp_by_8: i16,
        lr_storage_offset_from_sp_by_8: i16,
    },
    UseFramePointer,
    UseFramepointerWithOffsets {
        sp_offset_from_fp_by_8: u16,
        fp_storage_offset_from_fp_by_8: i16,
        lr_storage_offset_from_fp_by_8: i16,
    },
}

Variants

NoOp

(sp, fp, lr) = (sp, fp, lr) Only possible for the first frame. Subsequent frames must get the return address from somewhere other than the lr register to avoid infinite loops.

NoOpIfFirstFrameOtherwiseFp

(sp, fp, lr) = if is_first_frame (sp, fp, lr) else (fp + 16, *fp, *(fp + 8)) Used as a fallback rule.

OffsetSp

(sp, fp, lr) = (sp + 16x, fp, lr) Only possible for the first frame. Subsequent frames must get the return address from somewhere other than the lr register to avoid infinite loops.

Fields

sp_offset_by_16: u16

OffsetSpIfFirstFrameOtherwiseStackEndsHere

(sp, fp, lr) = (sp + 16x, fp, lr) if is_first_frame This rule reflects an ambiguity in DWARF CFI information. When the return address is “undefined” because it was omitted, it could mean “same value”, but this is only allowed for the first frame.

Fields

sp_offset_by_16: u16

OffsetSpAndRestoreLr

(sp, fp, lr) = (sp + 16x, fp, *(sp + 8y))

Fields

sp_offset_by_16: u16

lr_storage_offset_from_sp_by_8: i16

OffsetSpAndRestoreFpAndLr

(sp, fp, lr) = (sp + 16x, *(sp + 8y), *(sp + 8z))

Fields

sp_offset_by_16: u16

fp_storage_offset_from_sp_by_8: i16

lr_storage_offset_from_sp_by_8: i16

UseFramePointer

(sp, fp, lr) = (fp + 16, *fp, *(fp + 8))

UseFramepointerWithOffsets

(sp, fp, lr) = (fp + 8x, *(fp + 8y), *(fp + 8z))

Fields

sp_offset_from_fp_by_8: u16

fp_storage_offset_from_fp_by_8: i16

lr_storage_offset_from_fp_by_8: i16

Trait Implementations

impl Clone for UnwindRuleAarch64

fn clone(&self) -> UnwindRuleAarch64

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for UnwindRuleAarch64

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for UnwindRuleAarch64

fn eq(&self, other: &UnwindRuleAarch64) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for UnwindRuleAarch64

impl Eq for UnwindRuleAarch64

impl StructuralPartialEq for UnwindRuleAarch64