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devel/objfw: add BTCFI landing pads for amd64 and arm64
Fixed upstream: https://objfw.nil.im/info/262baf76e7e66bc4 https://objfw.nil.im/info/d73a388ecaf73b2a New release: https://objfw.nil.im/downloads/objfw-1.0.10.tar.gz https://objfw.nil.im/downloads/objfw-1.0.10.tar.gz.sig Am 24.02.24 um 22:17 schrieb Mark Kettenis: > Ah, right. What happens in that case is that the branch will use > register X16 or X17 and those are special in the sense that both "bti > c" and "bti j" landing pads are ok. Ah. Is that OpenBSD specific or on every OS? I used "bti jc" upstream now to be on the safe side. I think security-wise it shouldn't make much of a difference since it's still before the function prologue? > No, functions referenced from .init_array need a landing pad. So the > init function in src/forwarding/forwarding-arm64-elf.S would indeed > need a "bti c" at its start. That's what I already did upstream, after quickly checking what clang does :). -- Jonathan
devel/objfw: add BTCFI landing pads for amd64 and arm64