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Differential D51673

sysent: add a new NORETURN type flag
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Authored by brooks on Aug 1 2025, 12:45 PM.

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kib
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rG202ac0975edc: sysent: add a new NORETURN type flag

Summary

System calls of type NORETURN don't return and their stubs are declare
not to.

Diff Detail

Repository

rG FreeBSD src repository

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Tests Not Applicable

Event Timeline

brooks created this revision.Aug 1 2025, 12:45 PM

Herald added a subscriber: olce. · View Herald TranscriptAug 1 2025, 12:45 PM

brooks requested review of this revision.Aug 1 2025, 12:45 PM

Harbormaster completed remote builds in B65887: Diff 159546.Aug 1 2025, 12:45 PM

brooks added a child revision: D51674: syscalls.master: mark _exit as not returning.Aug 1 2025, 12:45 PM

kib accepted this revision.Aug 1 2025, 1:11 PM

This revision is now accepted and ready to land.Aug 1 2025, 1:11 PM

I did briefly wonder if there are any other attributes we might consider in the future, and if it'd be worth slightly expanding the flag/type syntax to allow a parameterized type for arbitrary attributes CAPENABLED|ATTR(_Noreturn, _Attr), but I think not.

Closed by commit rG202ac0975edc: sysent: add a new NORETURN type flag (authored by brooks). · Explain WhyAug 8 2025, 9:39 AM

This revision was automatically updated to reflect the committed changes.

brooks added a commit: rG202ac0975edc: sysent: add a new NORETURN type flag.

Revision Contents
Changeset List

Path

Size

sys/

kern/

syscalls.master

1 line

tools/

syscalls/

core/

1 line

scripts/

8 lines

Diff 160034

sys/kern/syscalls.master

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sys/tools/syscalls/core/syscall.lua

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sys/tools/syscalls/scripts/libsys_h.lua

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