Diffusion FreeBSD src repository - subversion rS336876

Use SMAP on amd64.
rS336876
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Description

Use SMAP on amd64.

Ifuncs selectors dispatch copyin(9) family to the suitable variant, to
set rflags.AC around userspace access. Rflags.AC bit is cleared in
all kernel entry points unconditionally even on machines not
supporting SMAP.

Reviewed by: jhb
Sponsored by: The FreeBSD Foundation
Differential revision: https://reviews.freebsd.org/D13838

Details

Provenance

kib	Authored on

Reviewer

jhb

Differential Revision

D13838: Implement ifunc support for x86, use it to enable SMAP on amd64.

Parents

rS336875: audit(4): add tests for sysctl(3) and sysarch(2)

Branches

Unknown

Tags

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Event Timeline

kib committed rS336876: Use SMAP on amd64..Jul 29 2018, 8:47 PM

Changes (11)

Path

Size

head/

sys/

amd64/

ia32/

include/

conf/

dev/

hyperv/

vmbus/

amd64/

vmbus_vector.S

rS336876

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head/sys/amd64/amd64/copyout.c

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head/sys/amd64/amd64/exception.S

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head/sys/amd64/amd64/initcpu.c

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head/sys/amd64/amd64/machdep.c

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head/sys/amd64/amd64/pmap.c

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head/sys/amd64/amd64/support.S

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head/sys/amd64/amd64/trap.c

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head/sys/amd64/ia32/ia32_exception.S

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head/sys/amd64/include/asmacros.h

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head/sys/conf/files.amd64

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head/sys/dev/hyperv/vmbus/amd64/vmbus_vector.S

Use SMAP on amd64.rS336876Actions

Description

Details

Event Timeline

Changes (11)

rS336876

head/sys/amd64/amd64/copyout.c

head/sys/amd64/amd64/exception.S

head/sys/amd64/amd64/initcpu.c

head/sys/amd64/amd64/machdep.c

head/sys/amd64/amd64/pmap.c

head/sys/amd64/amd64/support.S

head/sys/amd64/amd64/trap.c

head/sys/amd64/ia32/ia32_exception.S

head/sys/amd64/include/asmacros.h

head/sys/conf/files.amd64

head/sys/dev/hyperv/vmbus/amd64/vmbus_vector.S

Use SMAP on amd64.
rS336876
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