68 lines
2.1 KiB
Plaintext
68 lines
2.1 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
|
|
config HAVE_GCC_PLUGINS
|
|
bool
|
|
help
|
|
An arch should select this symbol if it supports building with
|
|
GCC plugins.
|
|
|
|
menuconfig GCC_PLUGINS
|
|
bool "GCC plugins"
|
|
depends on HAVE_GCC_PLUGINS
|
|
depends on CC_IS_GCC
|
|
depends on $(success,test -e $(shell,$(CC) -print-file-name=plugin)/include/plugin-version.h)
|
|
default y
|
|
help
|
|
GCC plugins are loadable modules that provide extra features to the
|
|
compiler. They are useful for runtime instrumentation and static analysis.
|
|
|
|
See Documentation/kbuild/gcc-plugins.rst for details.
|
|
|
|
if GCC_PLUGINS
|
|
|
|
config GCC_PLUGIN_CYC_COMPLEXITY
|
|
bool "Compute the cyclomatic complexity of a function" if EXPERT
|
|
depends on !COMPILE_TEST # too noisy
|
|
help
|
|
The complexity M of a function's control flow graph is defined as:
|
|
M = E - N + 2P
|
|
where
|
|
|
|
E = the number of edges
|
|
N = the number of nodes
|
|
P = the number of connected components (exit nodes).
|
|
|
|
Enabling this plugin reports the complexity to stderr during the
|
|
build. It mainly serves as a simple example of how to create a
|
|
gcc plugin for the kernel.
|
|
|
|
config GCC_PLUGIN_SANCOV
|
|
bool
|
|
help
|
|
This plugin inserts a __sanitizer_cov_trace_pc() call at the start of
|
|
basic blocks. It supports all gcc versions with plugin support (from
|
|
gcc-4.5 on). It is based on the commit "Add fuzzing coverage support"
|
|
by Dmitry Vyukov <dvyukov@google.com>.
|
|
|
|
config GCC_PLUGIN_LATENT_ENTROPY
|
|
bool "Generate some entropy during boot and runtime"
|
|
help
|
|
By saying Y here the kernel will instrument some kernel code to
|
|
extract some entropy from both original and artificially created
|
|
program state. This will help especially embedded systems where
|
|
there is little 'natural' source of entropy normally. The cost
|
|
is some slowdown of the boot process (about 0.5%) and fork and
|
|
irq processing.
|
|
|
|
Note that entropy extracted this way is not cryptographically
|
|
secure!
|
|
|
|
This plugin was ported from grsecurity/PaX. More information at:
|
|
* https://grsecurity.net/
|
|
* https://pax.grsecurity.net/
|
|
|
|
config GCC_PLUGIN_ARM_SSP_PER_TASK
|
|
bool
|
|
depends on GCC_PLUGINS && ARM
|
|
|
|
endif
|