Simplify non-pti syscall entry on amd64.
ClosedPublic
Actions

Authored by kib on Jul 19 2020, 9:54 AM.

Tags

None

Referenced Files

	Unknown Object (File)
	Thu, Oct 9, 3:56 AM

	Unknown Object (File)
	Tue, Sep 16, 12:47 AM

	Unknown Object (File)
	Sep 13 2025, 4:12 PM

	Unknown Object (File)
	Sep 12 2025, 7:50 PM

	Unknown Object (File)
	Sep 12 2025, 8:42 AM

	Unknown Object (File)
	Sep 12 2025, 4:29 AM

	Unknown Object (File)
	Sep 8 2025, 5:46 PM

	Unknown Object (File)
	Aug 25 2025, 5:34 AM

View All 81 Files

Subscribers

imp

pho

Details

Reviewers

alc
markj

Commits

rS363329: Simplify non-pti syscall entry on amd64.

Summary

Limit manipulations to use %rax as scratch to the pti portion of the syscall entry code.

Submitted by: alc

Diff Detail

Repository

rS FreeBSD src repository - subversion

Lint

Lint Not Applicable

Unit

Tests Not Applicable

Event Timeline

kib created this revision.Jul 19 2020, 9:54 AM

Herald added a subscriber: imp. · View Herald TranscriptJul 19 2020, 9:54 AM

kib requested review of this revision.Jul 19 2020, 9:54 AM

Harbormaster completed remote builds in B32412: Diff 74640.Jul 19 2020, 9:54 AM

kib mentioned this in D25483: amd64 pmap: microoptimize local shootdowns for PCID PTI configurations.Jul 19 2020, 9:55 AM

Thank you.

This revision is now accepted and ready to land.Jul 19 2020, 5:05 PM

markj accepted this revision.Jul 19 2020, 5:24 PM

Closed by commit rS363329: Simplify non-pti syscall entry on amd64. (authored by kib). · Explain WhyJul 19 2020, 5:48 PM

This revision was automatically updated to reflect the committed changes.

kib added a commit: rS363329: Simplify non-pti syscall entry on amd64..

Revision Contents
Changeset List

Path

Size

head/

sys/

amd64/

exception.S

5 lines

Diff 74652

View Options

head/sys/amd64/amd64/exception.S

Simplify non-pti syscall entry on amd64.ClosedPublicActions