1 # SPDX-License-Identifier: GPL-2.0-only
2 config HAVE_GCC_PLUGINS
3 	bool
4 	help
5 	  An arch should select this symbol if it supports building with
6 	  GCC plugins.
7 
8 menuconfig GCC_PLUGINS
9 	bool "GCC plugins"
10 	depends on HAVE_GCC_PLUGINS
11 	depends on CC_IS_GCC
12 	depends on $(success,test -e $(shell,$(CC) -print-file-name=plugin)/include/plugin-version.h)
13 	default y
14 	help
15 	  GCC plugins are loadable modules that provide extra features to the
16 	  compiler. They are useful for runtime instrumentation and static analysis.
17 
18 	  See Documentation/kbuild/gcc-plugins.rst for details.
19 
20 if GCC_PLUGINS
21 
22 config GCC_PLUGIN_SANCOV
23 	bool
24 	# Plugin can be removed once the kernel only supports GCC 6+
25 	depends on !CC_HAS_SANCOV_TRACE_PC
26 	help
27 	  This plugin inserts a __sanitizer_cov_trace_pc() call at the start of
28 	  basic blocks. It supports all gcc versions with plugin support (from
29 	  gcc-4.5 on). It is based on the commit "Add fuzzing coverage support"
30 	  by Dmitry Vyukov <dvyukov@google.com>.
31 
32 config GCC_PLUGIN_LATENT_ENTROPY
33 	bool "Generate some entropy during boot and runtime"
34 	help
35 	  By saying Y here the kernel will instrument some kernel code to
36 	  extract some entropy from both original and artificially created
37 	  program state.  This will help especially embedded systems where
38 	  there is little 'natural' source of entropy normally.  The cost
39 	  is some slowdown of the boot process (about 0.5%) and fork and
40 	  irq processing.
41 
42 	  Note that entropy extracted this way is not cryptographically
43 	  secure!
44 
45 	  This plugin was ported from grsecurity/PaX. More information at:
46 	   * https://grsecurity.net/
47 	   * https://pax.grsecurity.net/
48 
49 config GCC_PLUGIN_ARM_SSP_PER_TASK
50 	bool
51 	depends on GCC_PLUGINS && ARM
52 
53 endif
54