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Differential D42441

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

Sponsored by: Arm Ltd

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rG FreeBSD src repository
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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?

andrew updated this revision to Diff 129776.Nov 6 2023, 3:54 PM
  • 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
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sys/
arm64/
arm64/
73 lines

Diff 134843

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sys/arm64/arm64/elf_machdep.c

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