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[AArch64][PAC] Support BLRA* instructions in SLS Hardening pass
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Make SLS Hardening pass handle BLRA* instructions the same way it
handles BLR. The thunk names have the form

    __llvm_slsblr_thunk_xN            for BLR thunks
    __llvm_slsblr_thunk_(aaz|abz)_xN  for BLRAAZ and BLRABZ thunks
    __llvm_slsblr_thunk_(aa|ab)_xN_xM for BLRAA and BLRAB thunks

Now there are about 1800 possible thunk names, so do not rely on linear
thunk function's name lookup and parse the name instead.
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@atrosinenko
atrosinenko committed Jul 5, 2024
1 parent cc53b95 commit 38d720b
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