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Nick Desaulniers
a661c34fe6
The register offset macros in <asm/ptrace-abi.h> are guarded by `defined(__ASSEMBLER__) || defined(__FRAME_OFFSETS)` for 64-bit, but were left unguarded for 32-bit. This causes havoc for userspace that happens to use identifiers colliding with these short macro names (e.g., EBX, ECX, EAX, DS, ES, FS, GS, CS, SS). Without this guard, userspace is forced to be super extra careful with include ordering to minimize the chance of collision. Wrap both the 32-bit and 64-bit register definitions under `#if defined(__ASSEMBLER__) || defined(__FRAME_OFFSETS)`, and ensure User-Mode Linux (UML) defines `__FRAME_OFFSETS` for 32-bit as well. Closes: https://github.com/llvm/llvm-project/issues/217413 Assisted-by: LLM Signed-off-by: Nick Desaulniers <[email protected]> Signed-off-by: Borislav Petkov (AMD) <[email protected]> Acked-by: Oleg Nesterov <[email protected]> Acked-by: Johannes Berg <[email protected]> Tested-by: Elliott Hughes <[email protected]> Link: https://patch.msgid.link/[email protected]