linux-stable/arch/arm/vdso
Alexander Popov ddfaf0e43e ARM: vdso: Don't use gcc plugins for building vgettimeofday.c
Don't use gcc plugins for building arch/arm/vdso/vgettimeofday.c to
avoid unneeded instrumentation. As previously discussed[1]:

arm_ssp_per_task_plugin.c
	32-bit ARM only (but likely needs disabling for 32-bit ARM vDSO?)

cyc_complexity_plugin.c
	compile-time reporting only

latent_entropy_plugin.c
	this shouldn't get triggered for the vDSO (no __latent_entropy
	nor __init attributes in vDSO), but perhaps explicitly disabling
	it would be a sensible thing to do, just for robustness?

randomize_layout_plugin.c
	this shouldn't get triggered (again, lacking attributes), but
	should likely be disabled too.

sancov_plugin.c
	This should be tracking the KCOV directly (see
	scripts/Makefile.kcov), which is already disabled here.

structleak_plugin.c
	This should be fine in the vDSO, but there's no security
	boundary here, so it wouldn't be important to KEEP it enabled.

[1] https://lore.kernel.org/lkml/20200610073046.GA15939@willie-the-truck/

Signed-off-by: Alexander Popov <alex.popov@linux.com>
Link: https://lore.kernel.org/r/20200624123330.83226-3-alex.popov@linux.com
Signed-off-by: Kees Cook <keescook@chromium.org>
2020-06-24 07:48:27 -07:00
..
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
datapage.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
Makefile ARM: vdso: Don't use gcc plugins for building vgettimeofday.c 2020-06-24 07:48:27 -07:00
note.c ARM: 8930/1: Add support for generic vDSO 2019-11-15 22:21:12 +00:00
vdso.lds.S ARM: 8932/1: Add clock_gettime64 entry point 2019-11-15 22:21:15 +00:00
vdso.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
vdsomunge.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 340 2019-06-05 17:37:07 +02:00
vgettimeofday.c ARM: 8932/1: Add clock_gettime64 entry point 2019-11-15 22:21:15 +00:00