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Document a limitation of the DW_CFA_AARCH64_negate_ra_state.
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DW_CFA_AARCH64_negate_ra_state depends on the previous state of the RA_SIGN_STATE
register which makes complex to handle in cases when the register is set by
DWARF expressions because expression are lasily evaulated in runtime.
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@DanielKristofKiss
DanielKristofKiss committed Feb 7, 2022
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Expand Up @@ -582,6 +582,9 @@ This ABI defines one vendor call frame instruction

The ``DW_CFA_AARCH64_negate_ra_state`` operation negates bit[0] of the
RA_SIGN_STATE pseudo-register. It does not take any operands.
The ``DW_CFA_AARCH64_negate_ra_state`` shall not be mixed with other DWARF operations on the
RA_SIGN_STATE pseudo-register in one Common Information Entry (CIE) and Frame Descriptor
Entry (FDE) program sequence.

.. _DWARF expression operations:

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