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Bug 24043 – DMD does not emit IBT/BTI instructions

Status: RESOLVED
Resolution: FIXED
Severity: enhancement
Priority: P1
Component: dmd
Product: D
Version: D2
Platform: All
OS: Other
Creation time: 2023-07-10T13:22:22Z
Last change time: 2023-07-31T12:54:17Z
Assigned to: No Owner
Creator: Brian Callahan
Blocks: 20933

Comments

Comment #0 by bcallah — 2023-07-10T13:22:22Z

I asked on the forum. Putting this here as well. OpenBSD moved to an IBT/BTI world. This causes binaries created with DMD to fail, as DMD does not emit the proper instructions for IBT/BTI. It would be good to bring DMD into the IBT/BTI world, as the world is likely moving in this direction.

Comment #1 by dkorpel — 2023-07-10T13:59:33Z

Forum link: https://forum.dlang.org/thread/[email protected]?page=1 It would help if you could explain or give references explaining what "proper instructions for IBT/BTI" are.

Comment #2 by bcallah — 2023-07-10T14:12:05Z

ENDBR and NOTRACK

Comment #3 by bcallah — 2023-07-10T14:42:08Z

For completeness, this is the -fcf-protection=branch flag on GCC and Clang.

Comment #4 by bcallah — 2023-07-31T12:54:17Z

Fixed in https://github.com/dlang/dmd/commit/f0b891f82bca4ef2f2bad0c3f92435687d98eab2