arm64: Enable BTI in the kernel ELF loader
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Authored by andrew on Nov 2 2023, 10:32 AM.

Details

Reviewers

kib
markj
manu

Group Reviewers

arm64

Commits

rG670af174e27b: arm64: Enable BTI in the kernel ELF loader

Summary

Enable BTI in binaries loaded by the kernel. When the ELF file contains
the needed note indicating BTI is supported set the guarded page flag
for all segments.

Diff Detail

Repository

rG FreeBSD src repository

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Lint Not Applicable

Unit

Tests Not Applicable

Event Timeline

andrew created this revision.Nov 2 2023, 10:32 AM

Herald added a reviewer: manu. · View Herald TranscriptNov 2 2023, 10:32 AM

Herald added subscribers: emaste, imp. · View Herald Transcript

andrew requested review of this revision.Nov 2 2023, 10:32 AM

andrew added a parent revision: D42440: sysent: Add sv_protect.

Harbormaster completed remote builds in B54248: Diff 129624.Nov 2 2023, 10:33 AM

andrew added a reviewer: arm64.Nov 2 2023, 10:33 AM

andrew added a parent revision: D42442: imgact_elf: Move GNU_ABI_VENDOR to a common header.Nov 2 2023, 10:48 AM

andrew added a parent revision: D42328: arm64: Add BTI support to pmap.

markj added inline comments.Nov 2 2023, 2:33 PM

sys/arm64/arm64/elf_machdep.c
338	What does the 4 mean?

Catch up with nnew sv_protect KBI
Clean up length handling and add a comment

Harbormaster completed remote builds in B54302: Diff 129776.Nov 6 2023, 3:54 PM

markj accepted this revision.Nov 9 2023, 3:38 PM

This revision is now accepted and ready to land.Nov 9 2023, 3:38 PM

Closed by commit rG670af174e27b: arm64: Enable BTI in the kernel ELF loader (authored by andrew). · Explain WhyFeb 22 2024, 4:28 PM

This revision was automatically updated to reflect the committed changes.

andrew added a commit: rG670af174e27b: arm64: Enable BTI in the kernel ELF loader.

Revision Contents
Changeset List

Path

Size

sys/

arm64/

elf_machdep.c

73 lines

Diff 134843

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sys/arm64/arm64/elf_machdep.c

arm64: Enable BTI in the kernel ELF loaderClosedPublicActions