oskarwirga wrote:
Turns out there _is_ a fundamental reason NonLazyBind can't work on arm64e
today: the MachO ABI has no relocation type for compiler-emitted auth GOT
loads. `__auth_got` is entirely linker-internal; only linker-generated stubs
reference it. Apple hasn't made this relocation available, so getting
`NonLazyBind` working on arm64e would require an ABI extension that Apple
controls.
Apple's own toolchain actually has this same bug! Xcode emits unsigned GOT
loads on arm64e which is the same issue. Reproducible with:
```c
// repro.c
void external(void);
void caller(void) { external(); }
$ xcrun --sdk iphoneos clang -fno-plt -target arm64e-apple-ios16 -S -o -
repro.c | grep grep -A3 blr -B3
.cfi_offset w29, -16
adrp x8, _external@GOTPAGE
ldr x8, [x8, _external@GOTPAGEOFF]
blr x8 <----- This is bad
ldp x29, x30, [sp], #16 ; 16-byte Folded Reload
retab
.cfi_endproc
```
I think we keep this PR which suppresses NonLazyBind on arm64e. I've also
updated the tests and gating to use arm64e naming.
https://github.com/llvm/llvm-project/pull/188638
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