Date: Wed, 26 Jul 2023 18:06:24 GMT From: Dimitry Andric <dim@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org Subject: git: 98e7f836e65e - stable/12 - Work around VNET and DPCPU related panics on aarch64 Message-ID: <202307261806.36QI6O1b087625@gitrepo.freebsd.org>
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The branch stable/12 has been updated by dim: URL: https://cgit.FreeBSD.org/src/commit/?id=98e7f836e65ee413cd0b383371a6aca0115084ed commit 98e7f836e65ee413cd0b383371a6aca0115084ed Author: Dimitry Andric <dim@FreeBSD.org> AuthorDate: 2023-07-23 13:48:36 +0000 Commit: Dimitry Andric <dim@FreeBSD.org> CommitDate: 2023-07-26 18:03:46 +0000 Work around VNET and DPCPU related panics on aarch64 lld >= 14 and recent GNU ld can relax adrp+add and adrp+ldr instructions, which breaks VNET and DPCPU when used in modules. Until VNET and DPCPU can be fixed to deal with these relaxed instructions, disable linker relaxation for now. PR: 264094 Reviewed by: markj MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D41156 (cherry picked from commit 80e4ac2964a11edef456a15b77e43aadeaf273a2) --- sys/conf/kmod.mk | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/sys/conf/kmod.mk b/sys/conf/kmod.mk index 610484ba7e36..f67be86eeb73 100644 --- a/sys/conf/kmod.mk +++ b/sys/conf/kmod.mk @@ -168,6 +168,13 @@ CFLAGS+= -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer CFLAGS+= -fPIC .endif +.if ${MACHINE_CPUARCH} == "aarch64" +# https://bugs.freebsd.org/264094 +# lld >= 14 and recent GNU ld can relax adrp+add and adrp+ldr instructions, +# which breaks VNET. +LDFLAGS+= --no-relax +.endif + # Temporary workaround for PR 196407, which contains the fascinating details. # Don't allow clang to use fpu instructions or registers in kernel modules. .if ${MACHINE_CPUARCH} == arm
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