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
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@ -170,6 +170,13 @@ CFLAGS+= -fno-omit-frame-pointer -mno-omit-leaf-frame-pointer
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CFLAGS+= -fPIC
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.endif
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.if ${MACHINE_CPUARCH} == "aarch64"
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# https://bugs.freebsd.org/264094
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# lld >= 14 and recent GNU ld can relax adrp+add and adrp+ldr instructions,
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# which breaks VNET.
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LDFLAGS+= --no-relax
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.endif
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# Temporary workaround for PR 196407, which contains the fascinating details.
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# Don't allow clang to use fpu instructions or registers in kernel modules.
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.if ${MACHINE_CPUARCH} == arm
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