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linux(4): Add elf_hwcap2 to x86

Description

linux(4): Add elf_hwcap2 to x86

On x86 Linux via AT_HWCAP2 the user controlled (by tunables) processor
capabilities are exposed.

Reviewed by:
Differential Revision: https://reviews.freebsd.org/D41165
MFC after: 2 weeks

(cherry picked from commit 4281dab8bc11b3b2f3b58be5e0f67806329bddae)

Details

Provenance
dchaginAuthored on Jul 28 2023, 8:56 AM
Differential Revision
D41165: linux(4): Add elf_hwcap2 to x86
Parents
rG455b78443ee5: linux: binutils as requires %eflags instead of %flags for CFI.
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