https://bugs.llvm.org/show_bug.cgi?id=42095
Bug ID: 42095
Summary: [aarch64] implement
__attribute__(("branch-protection=none")) fn attribute
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: LLVM Codegen
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected], [email protected],
[email protected], [email protected],
[email protected], [email protected],
[email protected], [email protected],
[email protected]
via:
https://lore.kernel.org/linux-arm-kernel/201905300851.4A68705B0@keescook/T/#mab342863a3525c41af0d19c647c3c2b30907fb50
and: https://github.com/ClangBuiltLinux/linux/issues/501
It seems like ARMv8.3 Pointer Authentication instructions improve function
return address protection for the arm64 Linux kernel, but need to be able to
annotate functions as non-protected.
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