Kbuild updates for v4.18 (2nd)
- fix some bugs introduced by the recent Kconfig syntax extension
- add some symbols about compiler information in Kconfig, such as
CC_IS_GCC, CC_IS_CLANG, GCC_VERSION, etc.
- test compiler capability for the stack protector in Kconfig, and
clean-up Makefile
- test compiler capability for GCC-plugins in Kconfig, and clean-up
Makefile
- allow to enable GCC-plugins for COMPILE_TEST
- test compiler capability for KCOV in Kconfig and correct dependency
- remove auto-detect mode of the GCOV format, which is now more nicely
handled in Kconfig
- test compiler capability for mprofile-kernel on PowerPC, and
clean-up Makefile
- misc cleanups
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Merge tag 'kbuild-v4.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull more Kbuild updates from Masahiro Yamada:
- fix some bugs introduced by the recent Kconfig syntax extension
- add some symbols about compiler information in Kconfig, such as
CC_IS_GCC, CC_IS_CLANG, GCC_VERSION, etc.
- test compiler capability for the stack protector in Kconfig, and
clean-up Makefile
- test compiler capability for GCC-plugins in Kconfig, and clean-up
Makefile
- allow to enable GCC-plugins for COMPILE_TEST
- test compiler capability for KCOV in Kconfig and correct dependency
- remove auto-detect mode of the GCOV format, which is now more nicely
handled in Kconfig
- test compiler capability for mprofile-kernel on PowerPC, and clean-up
Makefile
- misc cleanups
* tag 'kbuild-v4.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
linux/linkage.h: replace VMLINUX_SYMBOL_STR() with __stringify()
kconfig: fix localmodconfig
sh: remove no-op macro VMLINUX_SYMBOL()
powerpc/kbuild: move -mprofile-kernel check to Kconfig
Documentation: kconfig: add recommended way to describe compiler support
gcc-plugins: disable GCC_PLUGIN_STRUCTLEAK_BYREF_ALL for COMPILE_TEST
gcc-plugins: allow to enable GCC_PLUGINS for COMPILE_TEST
gcc-plugins: test plugin support in Kconfig and clean up Makefile
gcc-plugins: move GCC version check for PowerPC to Kconfig
kcov: test compiler capability in Kconfig and correct dependency
gcov: remove CONFIG_GCOV_FORMAT_AUTODETECT
arm64: move GCC version check for ARCH_SUPPORTS_INT128 to Kconfig
kconfig: add CC_IS_CLANG and CLANG_VERSION
kconfig: add CC_IS_GCC and GCC_VERSION
stack-protector: test compiler capability in Kconfig and drop AUTO mode
kbuild: fix endless syncconfig in case arch Makefile sets CROSS_COMPILE
This commit is contained in:
Linus Torvalds
commit
be779f03d5
|
|
@ -473,6 +473,24 @@ config option to 'y' no matter the dependencies.
|
|||
The dependencies are moved to the symbol GENERIC_IOMAP and we avoid the
|
||||
situation where select forces a symbol equals to 'y'.
|
||||
|
||||
Adding features that need compiler support
|
||||
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
|
||||
|
||||
There are several features that need compiler support. The recommended way
|
||||
to describe the dependency on the compiler feature is to use "depends on"
|
||||
followed by a test macro.
|
||||
|
||||
config CC_STACKPROTECTOR
|
||||
bool "Stack Protector buffer overflow detection"
|
||||
depends on $(cc-option,-fstack-protector)
|
||||
...
|
||||
|
||||
If you need to expose a compiler capability to makefiles and/or C source files,
|
||||
CC_HAS_ is the recommended prefix for the config option.
|
||||
|
||||
config CC_HAS_STACKPROTECTOR_NONE
|
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def_bool $(cc-option,-fno-stack-protector)
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||||
|
||||
Build as module only
|
||||
~~~~~~~~~~~~~~~~~~~~
|
||||
To restrict a component build to module-only, qualify its config symbol
|
||||
|
|
|
|||
147
Makefile
147
Makefile
|
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@ -442,8 +442,6 @@ export KBUILD_AFLAGS_MODULE KBUILD_CFLAGS_MODULE KBUILD_LDFLAGS_MODULE
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|||
export KBUILD_AFLAGS_KERNEL KBUILD_CFLAGS_KERNEL
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||||
export KBUILD_ARFLAGS
|
||||
|
||||
export CC_VERSION_TEXT := $(shell $(CC) --version | head -n 1)
|
||||
|
||||
# When compiling out-of-tree modules, put MODVERDIR in the module
|
||||
# tree rather than in the kernel tree. The kernel tree might
|
||||
# even be read-only.
|
||||
|
|
@ -514,6 +512,12 @@ ifeq ($(shell $(CONFIG_SHELL) $(srctree)/scripts/cc-can-link.sh $(CC)), y)
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|||
export CC_CAN_LINK
|
||||
endif
|
||||
|
||||
# The expansion should be delayed until arch/$(SRCARCH)/Makefile is included.
|
||||
# Some architectures define CROSS_COMPILE in arch/$(SRCARCH)/Makefile.
|
||||
# CC_VERSION_TEXT is referenced from Kconfig (so it needs export),
|
||||
# and from include/config/auto.conf.cmd to detect the compiler upgrade.
|
||||
CC_VERSION_TEXT = $(shell $(CC) --version | head -n 1)
|
||||
|
||||
ifeq ($(config-targets),1)
|
||||
# ===========================================================================
|
||||
# *config targets only - make sure prerequisites are updated, and descend
|
||||
|
|
@ -523,7 +527,7 @@ ifeq ($(config-targets),1)
|
|||
# KBUILD_DEFCONFIG may point out an alternative default configuration
|
||||
# used for 'make defconfig'
|
||||
include arch/$(SRCARCH)/Makefile
|
||||
export KBUILD_DEFCONFIG KBUILD_KCONFIG
|
||||
export KBUILD_DEFCONFIG KBUILD_KCONFIG CC_VERSION_TEXT
|
||||
|
||||
config: scripts_basic outputmakefile FORCE
|
||||
$(Q)$(MAKE) $(build)=scripts/kconfig $@
|
||||
|
|
@ -585,12 +589,32 @@ virt-y := virt/
|
|||
endif # KBUILD_EXTMOD
|
||||
|
||||
ifeq ($(dot-config),1)
|
||||
# Read in config
|
||||
-include include/config/auto.conf
|
||||
endif
|
||||
|
||||
# The all: target is the default when no target is given on the
|
||||
# command line.
|
||||
# This allow a user to issue only 'make' to build a kernel including modules
|
||||
# Defaults to vmlinux, but the arch makefile usually adds further targets
|
||||
all: vmlinux
|
||||
|
||||
CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \
|
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$(call cc-option,-fno-tree-loop-im) \
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$(call cc-disable-warning,maybe-uninitialized,)
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||||
export CFLAGS_GCOV
|
||||
|
||||
# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
|
||||
# values of the respective KBUILD_* variables
|
||||
ARCH_CPPFLAGS :=
|
||||
ARCH_AFLAGS :=
|
||||
ARCH_CFLAGS :=
|
||||
include arch/$(SRCARCH)/Makefile
|
||||
|
||||
ifeq ($(dot-config),1)
|
||||
ifeq ($(KBUILD_EXTMOD),)
|
||||
# Read in dependencies to all Kconfig* files, make sure to run
|
||||
# oldconfig if changes are detected.
|
||||
# Read in dependencies to all Kconfig* files, make sure to run syncconfig if
|
||||
# changes are detected. This should be included after arch/$(SRCARCH)/Makefile
|
||||
# because some architectures define CROSS_COMPILE there.
|
||||
-include include/config/auto.conf.cmd
|
||||
|
||||
# To avoid any implicit rule to kick in, define an empty command
|
||||
|
|
@ -622,24 +646,6 @@ else
|
|||
include/config/auto.conf: ;
|
||||
endif # $(dot-config)
|
||||
|
||||
# The all: target is the default when no target is given on the
|
||||
# command line.
|
||||
# This allow a user to issue only 'make' to build a kernel including modules
|
||||
# Defaults to vmlinux, but the arch makefile usually adds further targets
|
||||
all: vmlinux
|
||||
|
||||
CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \
|
||||
$(call cc-option,-fno-tree-loop-im) \
|
||||
$(call cc-disable-warning,maybe-uninitialized,)
|
||||
export CFLAGS_GCOV CFLAGS_KCOV
|
||||
|
||||
# The arch Makefile can set ARCH_{CPP,A,C}FLAGS to override the default
|
||||
# values of the respective KBUILD_* variables
|
||||
ARCH_CPPFLAGS :=
|
||||
ARCH_AFLAGS :=
|
||||
ARCH_CFLAGS :=
|
||||
include arch/$(SRCARCH)/Makefile
|
||||
|
||||
KBUILD_CFLAGS += $(call cc-option,-fno-delete-null-pointer-checks,)
|
||||
KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,)
|
||||
KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation)
|
||||
|
|
@ -680,55 +686,11 @@ ifneq ($(CONFIG_FRAME_WARN),0)
|
|||
KBUILD_CFLAGS += $(call cc-option,-Wframe-larger-than=${CONFIG_FRAME_WARN})
|
||||
endif
|
||||
|
||||
# This selects the stack protector compiler flag. Testing it is delayed
|
||||
# until after .config has been reprocessed, in the prepare-compiler-check
|
||||
# target.
|
||||
ifdef CONFIG_CC_STACKPROTECTOR_AUTO
|
||||
stackp-flag := $(call cc-option,-fstack-protector-strong,$(call cc-option,-fstack-protector))
|
||||
stackp-name := AUTO
|
||||
else
|
||||
ifdef CONFIG_CC_STACKPROTECTOR_REGULAR
|
||||
stackp-flag := -fstack-protector
|
||||
stackp-name := REGULAR
|
||||
else
|
||||
ifdef CONFIG_CC_STACKPROTECTOR_STRONG
|
||||
stackp-flag := -fstack-protector-strong
|
||||
stackp-name := STRONG
|
||||
else
|
||||
# If either there is no stack protector for this architecture or
|
||||
# CONFIG_CC_STACKPROTECTOR_NONE is selected, we're done, and $(stackp-name)
|
||||
# is empty, skipping all remaining stack protector tests.
|
||||
#
|
||||
# Force off for distro compilers that enable stack protector by default.
|
||||
KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
|
||||
endif
|
||||
endif
|
||||
endif
|
||||
# Find arch-specific stack protector compiler sanity-checking script.
|
||||
ifdef stackp-name
|
||||
ifneq ($(stackp-flag),)
|
||||
stackp-path := $(srctree)/scripts/gcc-$(SRCARCH)_$(BITS)-has-stack-protector.sh
|
||||
stackp-check := $(wildcard $(stackp-path))
|
||||
# If the wildcard test matches a test script, run it to check functionality.
|
||||
ifdef stackp-check
|
||||
ifneq ($(shell $(CONFIG_SHELL) $(stackp-check) $(CC) $(KBUILD_CPPFLAGS) $(biarch)),y)
|
||||
stackp-broken := y
|
||||
endif
|
||||
endif
|
||||
ifndef stackp-broken
|
||||
# If the stack protector is functional, enable code that depends on it.
|
||||
KBUILD_CPPFLAGS += -DCONFIG_CC_STACKPROTECTOR
|
||||
# Either we've already detected the flag (for AUTO) or we'll fail the
|
||||
# build in the prepare-compiler-check rule (for specific flag).
|
||||
KBUILD_CFLAGS += $(stackp-flag)
|
||||
else
|
||||
# We have to make sure stack protector is unconditionally disabled if
|
||||
# the compiler is broken (in case we're going to continue the build in
|
||||
# AUTO mode).
|
||||
KBUILD_CFLAGS += $(call cc-option, -fno-stack-protector)
|
||||
endif
|
||||
endif
|
||||
endif
|
||||
stackp-flags-$(CONFIG_CC_HAS_STACKPROTECTOR_NONE) := -fno-stack-protector
|
||||
stackp-flags-$(CONFIG_CC_STACKPROTECTOR) := -fstack-protector
|
||||
stackp-flags-$(CONFIG_CC_STACKPROTECTOR_STRONG) := -fstack-protector-strong
|
||||
|
||||
KBUILD_CFLAGS += $(stackp-flags-y)
|
||||
|
||||
ifeq ($(cc-name),clang)
|
||||
KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,)
|
||||
|
|
@ -1112,7 +1074,7 @@ endif
|
|||
# prepare2 creates a makefile if using a separate output directory.
|
||||
# From this point forward, .config has been reprocessed, so any rules
|
||||
# that need to depend on updated CONFIG_* values can be checked here.
|
||||
prepare2: prepare3 prepare-compiler-check outputmakefile asm-generic
|
||||
prepare2: prepare3 outputmakefile asm-generic
|
||||
|
||||
prepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h \
|
||||
include/config/auto.conf
|
||||
|
|
@ -1138,43 +1100,6 @@ uapi-asm-generic:
|
|||
PHONY += prepare-objtool
|
||||
prepare-objtool: $(objtool_target)
|
||||
|
||||
# Check for CONFIG flags that require compiler support. Abort the build
|
||||
# after .config has been processed, but before the kernel build starts.
|
||||
#
|
||||
# For security-sensitive CONFIG options, we don't want to fallback and/or
|
||||
# silently change which compiler flags will be used, since that leads to
|
||||
# producing kernels with different security feature characteristics
|
||||
# depending on the compiler used. (For example, "But I selected
|
||||
# CC_STACKPROTECTOR_STRONG! Why did it build with _REGULAR?!")
|
||||
PHONY += prepare-compiler-check
|
||||
prepare-compiler-check: FORCE
|
||||
# Make sure compiler supports requested stack protector flag.
|
||||
ifdef stackp-name
|
||||
# Warn about CONFIG_CC_STACKPROTECTOR_AUTO having found no option.
|
||||
ifeq ($(stackp-flag),)
|
||||
@echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
|
||||
Compiler does not support any known stack-protector >&2
|
||||
else
|
||||
# Fail if specifically requested stack protector is missing.
|
||||
ifeq ($(call cc-option, $(stackp-flag)),)
|
||||
@echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
|
||||
$(stackp-flag) not supported by compiler >&2 && exit 1
|
||||
endif
|
||||
endif
|
||||
endif
|
||||
# Make sure compiler does not have buggy stack-protector support. If a
|
||||
# specific stack-protector was requested, fail the build, otherwise warn.
|
||||
ifdef stackp-broken
|
||||
ifeq ($(stackp-name),AUTO)
|
||||
@echo CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
|
||||
$(stackp-flag) available but compiler is broken: disabling >&2
|
||||
else
|
||||
@echo Cannot use CONFIG_CC_STACKPROTECTOR_$(stackp-name): \
|
||||
$(stackp-flag) available but compiler is broken >&2 && exit 1
|
||||
endif
|
||||
endif
|
||||
@:
|
||||
|
||||
# Generate some files
|
||||
# ---------------------------------------------------------------------------
|
||||
|
||||
|
|
|
|||
50
arch/Kconfig
50
arch/Kconfig
|
|
@ -405,6 +405,15 @@ config SECCOMP_FILTER
|
|||
|
||||
See Documentation/prctl/seccomp_filter.txt for details.
|
||||
|
||||
preferred-plugin-hostcc := $(if-success,[ $(gcc-version) -ge 40800 ],$(HOSTCXX),$(HOSTCC))
|
||||
|
||||
config PLUGIN_HOSTCC
|
||||
string
|
||||
default "$(shell,$(srctree)/scripts/gcc-plugin.sh "$(preferred-plugin-hostcc)" "$(HOSTCXX)" "$(CC)")"
|
||||
help
|
||||
Host compiler used to build GCC plugins. This can be $(HOSTCXX),
|
||||
$(HOSTCC), or a null string if GCC plugin is unsupported.
|
||||
|
||||
config HAVE_GCC_PLUGINS
|
||||
bool
|
||||
help
|
||||
|
|
@ -414,7 +423,7 @@ config HAVE_GCC_PLUGINS
|
|||
menuconfig GCC_PLUGINS
|
||||
bool "GCC plugins"
|
||||
depends on HAVE_GCC_PLUGINS
|
||||
depends on !COMPILE_TEST
|
||||
depends on PLUGIN_HOSTCC != ""
|
||||
help
|
||||
GCC plugins are loadable modules that provide extra features to the
|
||||
compiler. They are useful for runtime instrumentation and static analysis.
|
||||
|
|
@ -424,7 +433,7 @@ menuconfig GCC_PLUGINS
|
|||
config GCC_PLUGIN_CYC_COMPLEXITY
|
||||
bool "Compute the cyclomatic complexity of a function" if EXPERT
|
||||
depends on GCC_PLUGINS
|
||||
depends on !COMPILE_TEST
|
||||
depends on !COMPILE_TEST # too noisy
|
||||
help
|
||||
The complexity M of a function's control flow graph is defined as:
|
||||
M = E - N + 2P
|
||||
|
|
@ -484,6 +493,7 @@ config GCC_PLUGIN_STRUCTLEAK
|
|||
config GCC_PLUGIN_STRUCTLEAK_BYREF_ALL
|
||||
bool "Force initialize all struct type variables passed by reference"
|
||||
depends on GCC_PLUGIN_STRUCTLEAK
|
||||
depends on !COMPILE_TEST
|
||||
help
|
||||
Zero initialize any struct type local variable that may be passed by
|
||||
reference without having been initialized.
|
||||
|
|
@ -491,7 +501,7 @@ config GCC_PLUGIN_STRUCTLEAK_BYREF_ALL
|
|||
config GCC_PLUGIN_STRUCTLEAK_VERBOSE
|
||||
bool "Report forcefully initialized variables"
|
||||
depends on GCC_PLUGIN_STRUCTLEAK
|
||||
depends on !COMPILE_TEST
|
||||
depends on !COMPILE_TEST # too noisy
|
||||
help
|
||||
This option will cause a warning to be printed each time the
|
||||
structleak plugin finds a variable it thinks needs to be
|
||||
|
|
@ -531,7 +541,7 @@ config GCC_PLUGIN_RANDSTRUCT
|
|||
config GCC_PLUGIN_RANDSTRUCT_PERFORMANCE
|
||||
bool "Use cacheline-aware structure randomization"
|
||||
depends on GCC_PLUGIN_RANDSTRUCT
|
||||
depends on !COMPILE_TEST
|
||||
depends on !COMPILE_TEST # do not reduce test coverage
|
||||
help
|
||||
If you say Y here, the RANDSTRUCT randomization will make a
|
||||
best effort at restricting randomization to cacheline-sized
|
||||
|
|
@ -543,13 +553,16 @@ config HAVE_CC_STACKPROTECTOR
|
|||
bool
|
||||
help
|
||||
An arch should select this symbol if:
|
||||
- its compiler supports the -fstack-protector option
|
||||
- it has implemented a stack canary (e.g. __stack_chk_guard)
|
||||
|
||||
choice
|
||||
prompt "Stack Protector buffer overflow detection"
|
||||
config CC_HAS_STACKPROTECTOR_NONE
|
||||
def_bool $(cc-option,-fno-stack-protector)
|
||||
|
||||
config CC_STACKPROTECTOR
|
||||
bool "Stack Protector buffer overflow detection"
|
||||
depends on HAVE_CC_STACKPROTECTOR
|
||||
default CC_STACKPROTECTOR_AUTO
|
||||
depends on $(cc-option,-fstack-protector)
|
||||
default y
|
||||
help
|
||||
This option turns on the "stack-protector" GCC feature. This
|
||||
feature puts, at the beginning of functions, a canary value on
|
||||
|
|
@ -559,14 +572,6 @@ choice
|
|||
overwrite the canary, which gets detected and the attack is then
|
||||
neutralized via a kernel panic.
|
||||
|
||||
config CC_STACKPROTECTOR_NONE
|
||||
bool "None"
|
||||
help
|
||||
Disable "stack-protector" GCC feature.
|
||||
|
||||
config CC_STACKPROTECTOR_REGULAR
|
||||
bool "Regular"
|
||||
help
|
||||
Functions will have the stack-protector canary logic added if they
|
||||
have an 8-byte or larger character array on the stack.
|
||||
|
||||
|
|
@ -578,7 +583,10 @@ config CC_STACKPROTECTOR_REGULAR
|
|||
by about 0.3%.
|
||||
|
||||
config CC_STACKPROTECTOR_STRONG
|
||||
bool "Strong"
|
||||
bool "Strong Stack Protector"
|
||||
depends on CC_STACKPROTECTOR
|
||||
depends on $(cc-option,-fstack-protector-strong)
|
||||
default y
|
||||
help
|
||||
Functions will have the stack-protector canary logic added in any
|
||||
of the following conditions:
|
||||
|
|
@ -596,14 +604,6 @@ config CC_STACKPROTECTOR_STRONG
|
|||
about 20% of all kernel functions, which increases the kernel code
|
||||
size by about 2%.
|
||||
|
||||
config CC_STACKPROTECTOR_AUTO
|
||||
bool "Automatic"
|
||||
help
|
||||
If the compiler supports it, the best available stack-protector
|
||||
option will be chosen.
|
||||
|
||||
endchoice
|
||||
|
||||
config HAVE_ARCH_WITHIN_STACK_FRAMES
|
||||
bool
|
||||
help
|
||||
|
|
|
|||
|
|
@ -46,6 +46,7 @@ config ARM64
|
|||
select ARCH_USE_QUEUED_RWLOCKS
|
||||
select ARCH_SUPPORTS_MEMORY_FAILURE
|
||||
select ARCH_SUPPORTS_ATOMIC_RMW
|
||||
select ARCH_SUPPORTS_INT128 if GCC_VERSION >= 50000 || CC_IS_CLANG
|
||||
select ARCH_SUPPORTS_NUMA_BALANCING
|
||||
select ARCH_WANT_COMPAT_IPC_PARSE_VERSION
|
||||
select ARCH_WANT_FRAME_POINTERS
|
||||
|
|
|
|||
|
|
@ -56,12 +56,6 @@ KBUILD_AFLAGS += $(lseinstr) $(brokengasinst)
|
|||
KBUILD_CFLAGS += $(call cc-option,-mabi=lp64)
|
||||
KBUILD_AFLAGS += $(call cc-option,-mabi=lp64)
|
||||
|
||||
ifeq ($(cc-name),clang)
|
||||
KBUILD_CFLAGS += -DCONFIG_ARCH_SUPPORTS_INT128
|
||||
else
|
||||
KBUILD_CFLAGS += $(call cc-ifversion, -ge, 0500, -DCONFIG_ARCH_SUPPORTS_INT128)
|
||||
endif
|
||||
|
||||
ifeq ($(CONFIG_CPU_BIG_ENDIAN), y)
|
||||
KBUILD_CPPFLAGS += -mbig-endian
|
||||
CHECKFLAGS += -D__AARCH64EB__
|
||||
|
|
|
|||
|
|
@ -190,7 +190,7 @@ config PPC
|
|||
select HAVE_FTRACE_MCOUNT_RECORD
|
||||
select HAVE_FUNCTION_GRAPH_TRACER
|
||||
select HAVE_FUNCTION_TRACER
|
||||
select HAVE_GCC_PLUGINS
|
||||
select HAVE_GCC_PLUGINS if GCC_VERSION >= 50200 # plugin support on gcc <= 5.1 is buggy on PPC
|
||||
select HAVE_GENERIC_GUP
|
||||
select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
|
||||
select HAVE_IDE
|
||||
|
|
@ -461,23 +461,9 @@ config LD_HEAD_STUB_CATCH
|
|||
|
||||
If unsure, say "N".
|
||||
|
||||
config DISABLE_MPROFILE_KERNEL
|
||||
bool "Disable use of mprofile-kernel for kernel tracing"
|
||||
depends on PPC64 && CPU_LITTLE_ENDIAN
|
||||
default y
|
||||
help
|
||||
Selecting this options disables use of the mprofile-kernel ABI for
|
||||
kernel tracing. That will cause options such as live patching
|
||||
(CONFIG_LIVEPATCH) which depend on CONFIG_DYNAMIC_FTRACE_WITH_REGS to
|
||||
be disabled also.
|
||||
|
||||
If you have a toolchain which supports mprofile-kernel, then you can
|
||||
disable this. Otherwise leave it enabled. If you're not sure, say
|
||||
"Y".
|
||||
|
||||
config MPROFILE_KERNEL
|
||||
depends on PPC64 && CPU_LITTLE_ENDIAN
|
||||
def_bool !DISABLE_MPROFILE_KERNEL
|
||||
def_bool $(success,$(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__)
|
||||
|
||||
config HOTPLUG_CPU
|
||||
bool "Support for enabling/disabling CPUs"
|
||||
|
|
|
|||
|
|
@ -161,18 +161,7 @@ CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
|
|||
endif
|
||||
|
||||
ifdef CONFIG_MPROFILE_KERNEL
|
||||
ifeq ($(shell $(srctree)/arch/powerpc/tools/gcc-check-mprofile-kernel.sh $(CC) -I$(srctree)/include -D__KERNEL__),OK)
|
||||
CC_FLAGS_FTRACE := -pg -mprofile-kernel
|
||||
KBUILD_CPPFLAGS += -DCC_USING_MPROFILE_KERNEL
|
||||
else
|
||||
# If the user asked for mprofile-kernel but the toolchain doesn't
|
||||
# support it, emit a warning and deliberately break the build later
|
||||
# with mprofile-kernel-not-supported. We would prefer to make this an
|
||||
# error right here, but then the user would never be able to run
|
||||
# oldconfig to change their configuration.
|
||||
$(warning Compiler does not support mprofile-kernel, set CONFIG_DISABLE_MPROFILE_KERNEL)
|
||||
CC_FLAGS_FTRACE := -mprofile-kernel-not-supported
|
||||
endif
|
||||
endif
|
||||
|
||||
CFLAGS-$(CONFIG_CELL_CPU) += $(call cc-option,-mcpu=cell)
|
||||
|
|
|
|||
|
|
@ -14,7 +14,7 @@
|
|||
#include <asm-generic/module.h>
|
||||
|
||||
|
||||
#ifdef CC_USING_MPROFILE_KERNEL
|
||||
#ifdef CONFIG_MPROFILE_KERNEL
|
||||
#define MODULE_ARCH_VERMAGIC_FTRACE "mprofile-kernel "
|
||||
#else
|
||||
#define MODULE_ARCH_VERMAGIC_FTRACE ""
|
||||
|
|
|
|||
|
|
@ -466,7 +466,7 @@ static unsigned long stub_for_addr(const Elf64_Shdr *sechdrs,
|
|||
return (unsigned long)&stubs[i];
|
||||
}
|
||||
|
||||
#ifdef CC_USING_MPROFILE_KERNEL
|
||||
#ifdef CONFIG_MPROFILE_KERNEL
|
||||
static bool is_mprofile_mcount_callsite(const char *name, u32 *instruction)
|
||||
{
|
||||
if (strcmp("_mcount", name))
|
||||
|
|
@ -753,7 +753,7 @@ int apply_relocate_add(Elf64_Shdr *sechdrs,
|
|||
|
||||
#ifdef CONFIG_DYNAMIC_FTRACE
|
||||
|
||||
#ifdef CC_USING_MPROFILE_KERNEL
|
||||
#ifdef CONFIG_MPROFILE_KERNEL
|
||||
|
||||
#define PACATOC offsetof(struct paca_struct, kernel_toc)
|
||||
|
||||
|
|
|
|||
|
|
@ -144,7 +144,7 @@ __ftrace_make_nop(struct module *mod,
|
|||
return -EINVAL;
|
||||
}
|
||||
|
||||
#ifdef CC_USING_MPROFILE_KERNEL
|
||||
#ifdef CONFIG_MPROFILE_KERNEL
|
||||
/* When using -mkernel_profile there is no load to jump over */
|
||||
pop = PPC_INST_NOP;
|
||||
|
||||
|
|
@ -188,7 +188,7 @@ __ftrace_make_nop(struct module *mod,
|
|||
pr_err("Expected %08x found %08x\n", PPC_INST_LD_TOC, op);
|
||||
return -EINVAL;
|
||||
}
|
||||
#endif /* CC_USING_MPROFILE_KERNEL */
|
||||
#endif /* CONFIG_MPROFILE_KERNEL */
|
||||
|
||||
if (patch_instruction((unsigned int *)ip, pop)) {
|
||||
pr_err("Patching NOP failed.\n");
|
||||
|
|
@ -324,7 +324,7 @@ int ftrace_make_nop(struct module *mod,
|
|||
* They should effectively be a NOP, and follow formal constraints,
|
||||
* depending on the ABI. Return false if they don't.
|
||||
*/
|
||||
#ifndef CC_USING_MPROFILE_KERNEL
|
||||
#ifndef CONFIG_MPROFILE_KERNEL
|
||||
static int
|
||||
expected_nop_sequence(void *ip, unsigned int op0, unsigned int op1)
|
||||
{
|
||||
|
|
|
|||
|
|
@ -24,5 +24,4 @@ echo -e "#include <linux/compiler.h>\nnotrace int func() { return 0; }" | \
|
|||
2> /dev/null | grep -q "_mcount" && \
|
||||
exit 1
|
||||
|
||||
echo "OK"
|
||||
exit 0
|
||||
|
|
|
|||
|
|
@ -7,9 +7,9 @@
|
|||
#ifdef CONFIG_DWARF_UNWINDER
|
||||
#define DWARF_EH_FRAME \
|
||||
.eh_frame : AT(ADDR(.eh_frame) - LOAD_OFFSET) { \
|
||||
VMLINUX_SYMBOL(__start_eh_frame) = .; \
|
||||
__start_eh_frame = .; \
|
||||
*(.eh_frame) \
|
||||
VMLINUX_SYMBOL(__stop_eh_frame) = .; \
|
||||
__stop_eh_frame = .; \
|
||||
}
|
||||
#else
|
||||
#define DWARF_EH_FRAME
|
||||
|
|
|
|||
|
|
@ -130,7 +130,7 @@ config X86
|
|||
select HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD if X86_64
|
||||
select HAVE_ARCH_VMAP_STACK if X86_64
|
||||
select HAVE_ARCH_WITHIN_STACK_FRAMES
|
||||
select HAVE_CC_STACKPROTECTOR
|
||||
select HAVE_CC_STACKPROTECTOR if CC_HAS_SANE_STACKPROTECTOR
|
||||
select HAVE_CMPXCHG_DOUBLE
|
||||
select HAVE_CMPXCHG_LOCAL
|
||||
select HAVE_CONTEXT_TRACKING if X86_64
|
||||
|
|
@ -346,6 +346,15 @@ config PGTABLE_LEVELS
|
|||
default 2
|
||||
|
||||
source "init/Kconfig"
|
||||
|
||||
config CC_HAS_SANE_STACKPROTECTOR
|
||||
bool
|
||||
default $(success,$(srctree)/scripts/gcc-x86_64-has-stack-protector.sh $(CC)) if 64BIT
|
||||
default $(success,$(srctree)/scripts/gcc-x86_32-has-stack-protector.sh $(CC))
|
||||
help
|
||||
We have to make sure stack protector is unconditionally disabled if
|
||||
the compiler produces broken code.
|
||||
|
||||
source "kernel/Kconfig.freezer"
|
||||
|
||||
menu "Processor type and features"
|
||||
|
|
|
|||
|
|
@ -24,16 +24,16 @@
|
|||
|
||||
#ifndef cond_syscall
|
||||
#define cond_syscall(x) asm( \
|
||||
".weak " VMLINUX_SYMBOL_STR(x) "\n\t" \
|
||||
".set " VMLINUX_SYMBOL_STR(x) "," \
|
||||
VMLINUX_SYMBOL_STR(sys_ni_syscall))
|
||||
".weak " __stringify(x) "\n\t" \
|
||||
".set " __stringify(x) "," \
|
||||
__stringify(sys_ni_syscall))
|
||||
#endif
|
||||
|
||||
#ifndef SYSCALL_ALIAS
|
||||
#define SYSCALL_ALIAS(alias, name) asm( \
|
||||
".globl " VMLINUX_SYMBOL_STR(alias) "\n\t" \
|
||||
".set " VMLINUX_SYMBOL_STR(alias) "," \
|
||||
VMLINUX_SYMBOL_STR(name))
|
||||
".globl " __stringify(alias) "\n\t" \
|
||||
".set " __stringify(alias) "," \
|
||||
__stringify(name))
|
||||
#endif
|
||||
|
||||
#define __page_aligned_data __section(.data..page_aligned) __aligned(PAGE_SIZE)
|
||||
|
|
|
|||
15
init/Kconfig
15
init/Kconfig
|
|
@ -8,6 +8,21 @@ config DEFCONFIG_LIST
|
|||
default ARCH_DEFCONFIG
|
||||
default "arch/$(ARCH)/defconfig"
|
||||
|
||||
config CC_IS_GCC
|
||||
def_bool $(success,$(CC) --version | head -n 1 | grep -q gcc)
|
||||
|
||||
config GCC_VERSION
|
||||
int
|
||||
default $(shell,$(srctree)/scripts/gcc-version.sh -p $(CC) | sed 's/^0*//') if CC_IS_GCC
|
||||
default 0
|
||||
|
||||
config CC_IS_CLANG
|
||||
def_bool $(success,$(CC) --version | head -n 1 | grep -q clang)
|
||||
|
||||
config CLANG_VERSION
|
||||
int
|
||||
default $(shell,$(srctree)/scripts/clang-version.sh $(CC))
|
||||
|
||||
config CONSTRUCTORS
|
||||
bool
|
||||
depends on !UML
|
||||
|
|
|
|||
|
|
@ -53,23 +53,16 @@ config GCOV_PROFILE_ALL
|
|||
choice
|
||||
prompt "Specify GCOV format"
|
||||
depends on GCOV_KERNEL
|
||||
default GCOV_FORMAT_AUTODETECT
|
||||
---help---
|
||||
The gcov format is usually determined by the GCC version, but there are
|
||||
The gcov format is usually determined by the GCC version, and the
|
||||
default is chosen according to your GCC version. However, there are
|
||||
exceptions where format changes are integrated in lower-version GCCs.
|
||||
In such a case use this option to adjust the format used in the kernel
|
||||
accordingly.
|
||||
|
||||
If unsure, choose "Autodetect".
|
||||
|
||||
config GCOV_FORMAT_AUTODETECT
|
||||
bool "Autodetect"
|
||||
---help---
|
||||
Select this option to use the format that corresponds to your GCC
|
||||
version.
|
||||
In such a case, change this option to adjust the format used in the
|
||||
kernel accordingly.
|
||||
|
||||
config GCOV_FORMAT_3_4
|
||||
bool "GCC 3.4 format"
|
||||
depends on CC_IS_GCC && GCC_VERSION < 40700
|
||||
---help---
|
||||
Select this option to use the format defined by GCC 3.4.
|
||||
|
||||
|
|
|
|||
|
|
@ -4,5 +4,3 @@ ccflags-y := -DSRCTREE='"$(srctree)"' -DOBJTREE='"$(objtree)"'
|
|||
obj-y := base.o fs.o
|
||||
obj-$(CONFIG_GCOV_FORMAT_3_4) += gcc_3_4.o
|
||||
obj-$(CONFIG_GCOV_FORMAT_4_7) += gcc_4_7.o
|
||||
obj-$(CONFIG_GCOV_FORMAT_AUTODETECT) += $(call cc-ifversion, -lt, 0407, \
|
||||
gcc_3_4.o, gcc_4_7.o)
|
||||
|
|
|
|||
|
|
@ -736,12 +736,15 @@ config ARCH_HAS_KCOV
|
|||
only for x86_64. KCOV requires testing on other archs, and most likely
|
||||
disabling of instrumentation for some early boot code.
|
||||
|
||||
config CC_HAS_SANCOV_TRACE_PC
|
||||
def_bool $(cc-option,-fsanitize-coverage=trace-pc)
|
||||
|
||||
config KCOV
|
||||
bool "Code coverage for fuzzing"
|
||||
depends on ARCH_HAS_KCOV
|
||||
depends on CC_HAS_SANCOV_TRACE_PC || GCC_PLUGINS
|
||||
select DEBUG_FS
|
||||
select GCC_PLUGINS if !COMPILE_TEST
|
||||
select GCC_PLUGIN_SANCOV if !COMPILE_TEST
|
||||
select GCC_PLUGIN_SANCOV if !CC_HAS_SANCOV_TRACE_PC
|
||||
help
|
||||
KCOV exposes kernel code coverage information in a form suitable
|
||||
for coverage-guided fuzzing (randomized testing).
|
||||
|
|
@ -755,7 +758,7 @@ config KCOV
|
|||
config KCOV_ENABLE_COMPARISONS
|
||||
bool "Enable comparison operands collection by KCOV"
|
||||
depends on KCOV
|
||||
default n
|
||||
depends on $(cc-option,-fsanitize-coverage=trace-cmp)
|
||||
help
|
||||
KCOV also exposes operands of every comparison in the instrumented
|
||||
code along with operand sizes and PCs of the comparison instructions.
|
||||
|
|
@ -765,7 +768,7 @@ config KCOV_ENABLE_COMPARISONS
|
|||
config KCOV_INSTRUMENT_ALL
|
||||
bool "Instrument all code by default"
|
||||
depends on KCOV
|
||||
default y if KCOV
|
||||
default y
|
||||
help
|
||||
If you are doing generic system call fuzzing (like e.g. syzkaller),
|
||||
then you will want to instrument the whole kernel and you should
|
||||
|
|
|
|||
|
|
@ -25,3 +25,6 @@ cc-option = $(success,$(CC) -Werror $(1) -E -x c /dev/null -o /dev/null)
|
|||
# $(ld-option,<flag>)
|
||||
# Return y if the linker supports <flag>, n otherwise
|
||||
ld-option = $(success,$(LD) -v $(1))
|
||||
|
||||
# gcc version including patch level
|
||||
gcc-version := $(shell,$(srctree)/scripts/gcc-version.sh -p $(CC) | sed 's/^0*//')
|
||||
|
|
|
|||
|
|
@ -1,10 +1,4 @@
|
|||
# SPDX-License-Identifier: GPL-2.0
|
||||
ifdef CONFIG_GCC_PLUGINS
|
||||
__PLUGINCC := $(call cc-ifversion, -ge, 0408, $(HOSTCXX), $(HOSTCC))
|
||||
PLUGINCC := $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-plugin.sh "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)")
|
||||
|
||||
SANCOV_PLUGIN := -fplugin=$(objtree)/scripts/gcc-plugins/sancov_plugin.so
|
||||
|
||||
gcc-plugin-$(CONFIG_GCC_PLUGIN_CYC_COMPLEXITY) += cyc_complexity_plugin.so
|
||||
|
||||
gcc-plugin-$(CONFIG_GCC_PLUGIN_LATENT_ENTROPY) += latent_entropy_plugin.so
|
||||
|
|
@ -13,19 +7,7 @@ ifdef CONFIG_GCC_PLUGINS
|
|||
DISABLE_LATENT_ENTROPY_PLUGIN += -fplugin-arg-latent_entropy_plugin-disable
|
||||
endif
|
||||
|
||||
ifdef CONFIG_GCC_PLUGIN_SANCOV
|
||||
ifeq ($(strip $(CFLAGS_KCOV)),)
|
||||
# It is needed because of the gcc-plugin.sh and gcc version checks.
|
||||
gcc-plugin-$(CONFIG_GCC_PLUGIN_SANCOV) += sancov_plugin.so
|
||||
|
||||
ifneq ($(PLUGINCC),)
|
||||
CFLAGS_KCOV := $(SANCOV_PLUGIN)
|
||||
else
|
||||
$(warning warning: cannot use CONFIG_KCOV: -fsanitize-coverage=trace-pc is not supported by compiler)
|
||||
endif
|
||||
endif
|
||||
endif
|
||||
|
||||
gcc-plugin-$(CONFIG_GCC_PLUGIN_STRUCTLEAK) += structleak_plugin.so
|
||||
gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_VERBOSE) += -fplugin-arg-structleak_plugin-verbose
|
||||
gcc-plugin-cflags-$(CONFIG_GCC_PLUGIN_STRUCTLEAK_BYREF_ALL) += -fplugin-arg-structleak_plugin-byref-all
|
||||
|
|
@ -37,48 +19,19 @@ ifdef CONFIG_GCC_PLUGINS
|
|||
|
||||
GCC_PLUGINS_CFLAGS := $(strip $(addprefix -fplugin=$(objtree)/scripts/gcc-plugins/, $(gcc-plugin-y)) $(gcc-plugin-cflags-y))
|
||||
|
||||
export PLUGINCC GCC_PLUGINS_CFLAGS GCC_PLUGIN GCC_PLUGIN_SUBDIR
|
||||
export SANCOV_PLUGIN DISABLE_LATENT_ENTROPY_PLUGIN
|
||||
export GCC_PLUGINS_CFLAGS GCC_PLUGIN GCC_PLUGIN_SUBDIR
|
||||
export DISABLE_LATENT_ENTROPY_PLUGIN
|
||||
|
||||
ifneq ($(PLUGINCC),)
|
||||
# SANCOV_PLUGIN can be only in CFLAGS_KCOV because avoid duplication.
|
||||
GCC_PLUGINS_CFLAGS := $(filter-out $(SANCOV_PLUGIN), $(GCC_PLUGINS_CFLAGS))
|
||||
endif
|
||||
# sancov_plugin.so can be only in CFLAGS_KCOV because avoid duplication.
|
||||
GCC_PLUGINS_CFLAGS := $(filter-out %/sancov_plugin.so, $(GCC_PLUGINS_CFLAGS))
|
||||
|
||||
KBUILD_CFLAGS += $(GCC_PLUGINS_CFLAGS)
|
||||
GCC_PLUGIN := $(gcc-plugin-y)
|
||||
GCC_PLUGIN_SUBDIR := $(gcc-plugin-subdir-y)
|
||||
endif
|
||||
|
||||
# If plugins aren't supported, abort the build before hard-to-read compiler
|
||||
# errors start getting spewed by the main build.
|
||||
PHONY += gcc-plugins-check
|
||||
gcc-plugins-check: FORCE
|
||||
ifdef CONFIG_GCC_PLUGINS
|
||||
ifeq ($(PLUGINCC),)
|
||||
ifneq ($(GCC_PLUGINS_CFLAGS),)
|
||||
# Various gccs between 4.5 and 5.1 have bugs on powerpc due to missing
|
||||
# header files. gcc <= 4.6 doesn't work at all, gccs from 4.8 to 5.1 have
|
||||
# issues with 64-bit targets.
|
||||
ifeq ($(ARCH),powerpc)
|
||||
ifeq ($(call cc-ifversion, -le, 0501, y), y)
|
||||
@echo "Cannot use CONFIG_GCC_PLUGINS: plugin support on gcc <= 5.1 is buggy on powerpc, please upgrade to gcc 5.2 or newer" >&2 && exit 1
|
||||
endif
|
||||
endif
|
||||
ifeq ($(call cc-ifversion, -ge, 0405, y), y)
|
||||
$(Q)$(srctree)/scripts/gcc-plugin.sh --show-error "$(__PLUGINCC)" "$(HOSTCXX)" "$(CC)" || true
|
||||
@echo "Cannot use CONFIG_GCC_PLUGINS: your gcc installation does not support plugins, perhaps the necessary headers are missing?" >&2 && exit 1
|
||||
else
|
||||
@echo "Cannot use CONFIG_GCC_PLUGINS: your gcc version does not support plugins, you should upgrade it to at least gcc 4.5" >&2 && exit 1
|
||||
endif
|
||||
endif
|
||||
endif
|
||||
endif
|
||||
@:
|
||||
|
||||
# Actually do the build, if requested.
|
||||
PHONY += gcc-plugins
|
||||
gcc-plugins: scripts_basic gcc-plugins-check
|
||||
gcc-plugins: scripts_basic
|
||||
ifdef CONFIG_GCC_PLUGINS
|
||||
$(Q)$(MAKE) $(build)=scripts/gcc-plugins
|
||||
endif
|
||||
|
|
|
|||
|
|
@ -1,7 +1,9 @@
|
|||
ifdef CONFIG_KCOV
|
||||
CFLAGS_KCOV := $(call cc-option,-fsanitize-coverage=trace-pc,)
|
||||
ifeq ($(CONFIG_KCOV_ENABLE_COMPARISONS),y)
|
||||
CFLAGS_KCOV += $(call cc-option,-fsanitize-coverage=trace-cmp,)
|
||||
endif
|
||||
|
||||
kcov-flags-$(CONFIG_CC_HAS_SANCOV_TRACE_PC) += -fsanitize-coverage=trace-pc
|
||||
kcov-flags-$(CONFIG_KCOV_ENABLE_COMPARISONS) += -fsanitize-coverage=trace-cmp
|
||||
kcov-flags-$(CONFIG_GCC_PLUGIN_SANCOV) += -fplugin=$(objtree)/scripts/gcc-plugins/sancov_plugin.so
|
||||
|
||||
export CFLAGS_KCOV := $(kcov-flags-y)
|
||||
|
||||
endif
|
||||
|
|
|
|||
|
|
@ -10,24 +10,14 @@
|
|||
# clang-5.0.1 etc.
|
||||
#
|
||||
|
||||
if [ "$1" = "-p" ] ; then
|
||||
with_patchlevel=1;
|
||||
shift;
|
||||
fi
|
||||
|
||||
compiler="$*"
|
||||
|
||||
if [ ${#compiler} -eq 0 ]; then
|
||||
echo "Error: No compiler specified."
|
||||
printf "Usage:\n\t$0 <clang-command>\n"
|
||||
if !( $compiler --version | grep -q clang) ; then
|
||||
echo 0
|
||||
exit 1
|
||||
fi
|
||||
|
||||
MAJOR=$(echo __clang_major__ | $compiler -E -x c - | tail -n 1)
|
||||
MINOR=$(echo __clang_minor__ | $compiler -E -x c - | tail -n 1)
|
||||
if [ "x$with_patchlevel" != "x" ] ; then
|
||||
PATCHLEVEL=$(echo __clang_patchlevel__ | $compiler -E -x c - | tail -n 1)
|
||||
printf "%02d%02d%02d\\n" $MAJOR $MINOR $PATCHLEVEL
|
||||
else
|
||||
printf "%02d%02d\\n" $MAJOR $MINOR
|
||||
fi
|
||||
printf "%d%02d%02d\\n" $MAJOR $MINOR $PATCHLEVEL
|
||||
|
|
|
|||
|
|
@ -1,4 +1,5 @@
|
|||
# SPDX-License-Identifier: GPL-2.0
|
||||
PLUGINCC := $(CONFIG_PLUGIN_HOSTCC:"%"=%)
|
||||
GCC_PLUGINS_DIR := $(shell $(CC) -print-file-name=plugin)
|
||||
|
||||
ifeq ($(PLUGINCC),$(HOSTCC))
|
||||
|
|
@ -13,10 +14,6 @@ else
|
|||
export HOST_EXTRACXXFLAGS
|
||||
endif
|
||||
|
||||
ifneq ($(CFLAGS_KCOV), $(SANCOV_PLUGIN))
|
||||
GCC_PLUGIN := $(filter-out $(SANCOV_PLUGIN), $(GCC_PLUGIN))
|
||||
endif
|
||||
|
||||
export HOSTLIBS
|
||||
|
||||
$(obj)/randomize_layout_plugin.o: $(objtree)/$(obj)/randomize_layout_seed.h
|
||||
|
|
|
|||
|
|
@ -1,9 +1,4 @@
|
|||
#!/bin/sh
|
||||
# SPDX-License-Identifier: GPL-2.0
|
||||
|
||||
echo "int foo(void) { char X[200]; return 3; }" | $* -S -x c -c -O0 -fstack-protector - -o - 2> /dev/null | grep -q "%gs"
|
||||
if [ "$?" -eq "0" ] ; then
|
||||
echo y
|
||||
else
|
||||
echo n
|
||||
fi
|
||||
echo "int foo(void) { char X[200]; return 3; }" | $* -S -x c -c -m32 -O0 -fstack-protector - -o - 2> /dev/null | grep -q "%gs"
|
||||
|
|
|
|||
|
|
@ -2,8 +2,3 @@
|
|||
# SPDX-License-Identifier: GPL-2.0
|
||||
|
||||
echo "int foo(void) { char X[200]; return 3; }" | $* -S -x c -c -O0 -mcmodel=kernel -fno-PIE -fstack-protector - -o - 2> /dev/null | grep -q "%gs"
|
||||
if [ "$?" -eq "0" ] ; then
|
||||
echo y
|
||||
else
|
||||
echo n
|
||||
fi
|
||||
|
|
|
|||
|
|
@ -165,10 +165,10 @@ sub read_kconfig {
|
|||
my $last_source = "";
|
||||
|
||||
# Check for any environment variables used
|
||||
while ($source =~ /\$(\w+)/ && $last_source ne $source) {
|
||||
while ($source =~ /\$\((\w+)\)/ && $last_source ne $source) {
|
||||
my $env = $1;
|
||||
$last_source = $source;
|
||||
$source =~ s/\$$env/$ENV{$env}/;
|
||||
$source =~ s/\$\($env\)/$ENV{$env}/;
|
||||
}
|
||||
|
||||
open(my $kinfile, '<', $source) || die "Can't open $kconfig";
|
||||
|
|
|
|||
Loading…
Reference in New Issue