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Differential D51005

sys: Add AT_HWCAP3 and AT_HWCAP4
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Authored by andrew on Jun 24 2025, 11:40 AM.
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emaste
imp
jhibbits
olce

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kib
brooks
jhb
markj
manu
imp
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rG85007872d122: sys: Add AT_HWCAP3 and AT_HWCAP4
Summary

It is likely we will need these on arm64. Add them in preparation for
flags in these to be added at some point in the future.

Sponsored by: Arm Ltd

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rG FreeBSD src repository
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Event Timeline

andrew created this revision.Jun 24 2025, 11:40 AM
Herald added a reviewer: manu. · View Herald TranscriptJun 24 2025, 11:40 AM
Herald added subscribers: olce, jhibbits, emaste, imp. · View Herald Transcript
andrew requested review of this revision.Jun 24 2025, 11:40 AM
Harbormaster completed remote builds in B65044: Diff 157510.Jun 24 2025, 11:40 AM
andrew added a child revision: D51006: libsys: Add AT_HWCAP3 and AT_HWCAP4.Jun 24 2025, 11:40 AM
emaste added inline comments.Jun 24 2025, 11:55 AM
sys/compat/linux/linux_misc.h
89–90

third part, fourth part? Or perhaps just CPU capabilities, continued for all of them

andrew updated this revision to Diff 157516.Jun 24 2025, 1:02 PM

Fix the LINUX_AT_HWCAP* comments

Harbormaster completed remote builds in B65049: Diff 157516.Jun 24 2025, 1:02 PM
brooks accepted this revision.Jun 24 2025, 2:54 PM

Looks good.

I've verified that we don't have any more AT_ flags in CheriBSD yet.

I wish we would be nice to switch to a less explicit struct sysentvec initialization style so changes didn't produce so much churn, but that would be for another review.

This revision is now accepted and ready to land.Jun 24 2025, 2:54 PM
kib accepted this revision.Jun 24 2025, 3:25 PM
imp accepted this revision.Jun 24 2025, 3:32 PM
Closed by commit rG85007872d122: sys: Add AT_HWCAP3 and AT_HWCAP4 (authored by andrew). · Explain WhyJun 25 2025, 9:25 AM
This revision was automatically updated to reflect the committed changes.
andrew added a commit: rG85007872d122: sys: Add AT_HWCAP3 and AT_HWCAP4.

Revision Contents
Changeset List

PathSize
sys/
amd64/
linux/
2 lines
linux32/
2 lines
arm/
arm/
2 lines
arm64/
arm64/
2 lines
2 lines
linux/
2 lines
compat/
linux/
4 lines
i386/
linux/
4 lines
kern/
4 lines
powerpc/
powerpc/
2 lines
4 lines
1 line
sys/
4 lines
2 lines

Diff 157581

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sys/amd64/linux/linux_sysvec.c

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sys/amd64/linux32/linux32_sysvec.c

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sys/arm/arm/elf_machdep.c

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sys/arm64/arm64/elf32_machdep.c

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sys/arm64/arm64/elf_machdep.c

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sys/arm64/linux/linux_sysvec.c

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sys/compat/linux/linux_misc.h

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sys/i386/linux/linux_sysvec.c

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sys/kern/imgact_elf.c

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sys/powerpc/powerpc/elf32_machdep.c

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sys/powerpc/powerpc/elf64_machdep.c

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sys/powerpc/powerpc/elf_common.c

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sys/sys/elf_common.h

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sys/sys/sysent.h

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