diff options
Diffstat (limited to 'scripts')
98 files changed, 2515 insertions, 1384 deletions
diff --git a/scripts/Makefile.btf b/scripts/Makefile.btf new file mode 100644 index 000000000000..82377e470aed --- /dev/null +++ b/scripts/Makefile.btf @@ -0,0 +1,19 @@ +# SPDX-License-Identifier: GPL-2.0 + +pahole-ver := $(CONFIG_PAHOLE_VERSION) +pahole-flags-y := + +# pahole 1.18 through 1.21 can't handle zero-sized per-CPU vars +ifeq ($(call test-le, $(pahole-ver), 121),y) +pahole-flags-$(call test-ge, $(pahole-ver), 118) += --skip_encoding_btf_vars +endif + +pahole-flags-$(call test-ge, $(pahole-ver), 121) += --btf_gen_floats + +pahole-flags-$(call test-ge, $(pahole-ver), 122) += -j + +pahole-flags-$(CONFIG_PAHOLE_HAS_LANG_EXCLUDE) += --lang_exclude=rust + +pahole-flags-$(call test-ge, $(pahole-ver), 125) += --skip_encoding_btf_inconsistent_proto --btf_gen_optimized + +export PAHOLE_FLAGS := $(pahole-flags-y) diff --git a/scripts/Makefile.build b/scripts/Makefile.build index 82e3fb19fdaf..dae447a1ad30 100644 --- a/scripts/Makefile.build +++ b/scripts/Makefile.build @@ -262,7 +262,7 @@ $(obj)/%.lst: $(src)/%.c FORCE # Compile Rust sources (.rs) # --------------------------------------------------------------------------- -rust_allowed_features := new_uninit +rust_allowed_features := new_uninit,offset_of # `--out-dir` is required to avoid temporaries being created by `rustc` in the # current working directory, which may be not accessible in the out-of-tree @@ -275,6 +275,7 @@ rust_common_cmd = \ --extern alloc --extern kernel \ --crate-type rlib -L $(objtree)/rust/ \ --crate-name $(basename $(notdir $@)) \ + --sysroot=/dev/null \ --out-dir $(dir $@) --emit=dep-info=$(depfile) # `--emit=obj`, `--emit=asm` and `--emit=llvm-ir` imply a single codegen unit @@ -425,7 +426,7 @@ $(obj)/lib.a: $(lib-y) FORCE $(call if_changed,ar) quiet_cmd_ld_multi_m = LD [M] $@ - cmd_ld_multi_m = $(LD) $(ld_flags) -r -o $@ @$(patsubst %.o,%.mod,$@) $(cmd_objtool) + cmd_ld_multi_m = $(LD) $(ld_flags) -r -o $@ @$< $(cmd_objtool) define rule_ld_multi_m $(call cmd_and_savecmd,ld_multi_m) diff --git a/scripts/Makefile.defconf b/scripts/Makefile.defconf index ab271b2051a2..226ea3df3b4b 100644 --- a/scripts/Makefile.defconf +++ b/scripts/Makefile.defconf @@ -9,8 +9,8 @@ # Input config fragments without '.config' suffix define merge_into_defconfig $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ - -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ - $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) + -m -O $(objtree) $(srctree)/arch/$(SRCARCH)/configs/$(1) \ + $(foreach config,$(2),$(srctree)/arch/$(SRCARCH)/configs/$(config).config) +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig endef @@ -23,7 +23,7 @@ endef # Input config fragments without '.config' suffix define merge_into_defconfig_override $(Q)$(CONFIG_SHELL) $(srctree)/scripts/kconfig/merge_config.sh \ - -Q -m -O $(objtree) $(srctree)/arch/$(ARCH)/configs/$(1) \ - $(foreach config,$(2),$(srctree)/arch/$(ARCH)/configs/$(config).config) + -Q -m -O $(objtree) $(srctree)/arch/$(SRCARCH)/configs/$(1) \ + $(foreach config,$(2),$(srctree)/arch/$(SRCARCH)/configs/$(config).config) +$(Q)$(MAKE) -f $(srctree)/Makefile olddefconfig endef diff --git a/scripts/Makefile.extrawarn b/scripts/Makefile.extrawarn index 40cd13eca82e..a9e552a1e910 100644 --- a/scripts/Makefile.extrawarn +++ b/scripts/Makefile.extrawarn @@ -6,16 +6,81 @@ # They are independent, and can be combined like W=12 or W=123e. # ========================================================================== -KBUILD_CFLAGS += $(call cc-disable-warning, packed-not-aligned) +# Default set of warnings, always enabled +KBUILD_CFLAGS += -Wall +KBUILD_CFLAGS += -Wundef +KBUILD_CFLAGS += -Werror=implicit-function-declaration +KBUILD_CFLAGS += -Werror=implicit-int +KBUILD_CFLAGS += -Werror=return-type +KBUILD_CFLAGS += -Werror=strict-prototypes +KBUILD_CFLAGS += -Wno-format-security +KBUILD_CFLAGS += -Wno-trigraphs +KBUILD_CFLAGS += $(call cc-disable-warning,frame-address,) +KBUILD_CFLAGS += $(call cc-disable-warning, address-of-packed-member) +KBUILD_CFLAGS += -Wmissing-declarations +KBUILD_CFLAGS += -Wmissing-prototypes + +ifneq ($(CONFIG_FRAME_WARN),0) +KBUILD_CFLAGS += -Wframe-larger-than=$(CONFIG_FRAME_WARN) +endif + +KBUILD_CPPFLAGS-$(CONFIG_WERROR) += -Werror +KBUILD_CPPFLAGS += $(KBUILD_CPPFLAGS-y) +KBUILD_CFLAGS-$(CONFIG_CC_NO_ARRAY_BOUNDS) += -Wno-array-bounds -# backward compatibility -KBUILD_EXTRA_WARN ?= $(KBUILD_ENABLE_EXTRA_GCC_CHECKS) +ifdef CONFIG_CC_IS_CLANG +# The kernel builds with '-std=gnu11' so use of GNU extensions is acceptable. +KBUILD_CFLAGS += -Wno-gnu +else -ifeq ("$(origin W)", "command line") - KBUILD_EXTRA_WARN := $(W) +# gcc inanely warns about local variables called 'main' +KBUILD_CFLAGS += -Wno-main endif -export KBUILD_EXTRA_WARN +# These warnings generated too much noise in a regular build. +# Use make W=1 to enable them (see scripts/Makefile.extrawarn) +KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) +KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) + +# These result in bogus false positives +KBUILD_CFLAGS += $(call cc-disable-warning, dangling-pointer) + +# Variable Length Arrays (VLAs) should not be used anywhere in the kernel +KBUILD_CFLAGS += -Wvla + +# disable pointer signed / unsigned warnings in gcc 4.0 +KBUILD_CFLAGS += -Wno-pointer-sign + +# In order to make sure new function cast mismatches are not introduced +# in the kernel (to avoid tripping CFI checking), the kernel should be +# globally built with -Wcast-function-type. +KBUILD_CFLAGS += $(call cc-option, -Wcast-function-type) + +# The allocators already balk at large sizes, so silence the compiler +# warnings for bounds checks involving those possible values. While +# -Wno-alloc-size-larger-than would normally be used here, earlier versions +# of gcc (<9.1) weirdly don't handle the option correctly when _other_ +# warnings are produced (?!). Using -Walloc-size-larger-than=SIZE_MAX +# doesn't work (as it is documented to), silently resolving to "0" prior to +# version 9.1 (and producing an error more recently). Numeric values larger +# than PTRDIFF_MAX also don't work prior to version 9.1, which are silently +# ignored, continuing to default to PTRDIFF_MAX. So, left with no other +# choice, we must perform a versioned check to disable this warning. +# https://lore.kernel.org/lkml/20210824115859.187f272f@canb.auug.org.au +KBUILD_CFLAGS-$(call gcc-min-version, 90100) += -Wno-alloc-size-larger-than +KBUILD_CFLAGS += $(KBUILD_CFLAGS-y) $(CONFIG_CC_IMPLICIT_FALLTHROUGH) + +# Prohibit date/time macros, which would make the build non-deterministic +KBUILD_CFLAGS += -Werror=date-time + +# enforce correct pointer usage +KBUILD_CFLAGS += $(call cc-option,-Werror=incompatible-pointer-types) + +# Require designated initializers for all marked structures +KBUILD_CFLAGS += $(call cc-option,-Werror=designated-init) + +# Warn if there is an enum types mismatch +KBUILD_CFLAGS += $(call cc-option,-Wenum-conversion) # # W=1 - warnings which may be relevant and do not occur too often @@ -23,20 +88,16 @@ export KBUILD_EXTRA_WARN ifneq ($(findstring 1, $(KBUILD_EXTRA_WARN)),) KBUILD_CFLAGS += -Wextra -Wunused -Wno-unused-parameter -KBUILD_CFLAGS += -Wmissing-declarations +KBUILD_CFLAGS += $(call cc-option, -Wrestrict) KBUILD_CFLAGS += -Wmissing-format-attribute -KBUILD_CFLAGS += -Wmissing-prototypes KBUILD_CFLAGS += -Wold-style-definition KBUILD_CFLAGS += -Wmissing-include-dirs KBUILD_CFLAGS += $(call cc-option, -Wunused-but-set-variable) KBUILD_CFLAGS += $(call cc-option, -Wunused-const-variable) KBUILD_CFLAGS += $(call cc-option, -Wpacked-not-aligned) +KBUILD_CFLAGS += $(call cc-option, -Wformat-overflow) +KBUILD_CFLAGS += $(call cc-option, -Wformat-truncation) KBUILD_CFLAGS += $(call cc-option, -Wstringop-truncation) -# The following turn off the warnings enabled by -Wextra -KBUILD_CFLAGS += -Wno-missing-field-initializers -KBUILD_CFLAGS += -Wno-sign-compare -KBUILD_CFLAGS += -Wno-type-limits -KBUILD_CFLAGS += -Wno-shift-negative-value KBUILD_CPPFLAGS += -Wundef KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN1 @@ -45,9 +106,15 @@ else # Some diagnostics enabled by default are noisy. # Suppress them by using -Wno... except for W=1. +KBUILD_CFLAGS += $(call cc-disable-warning, unused-but-set-variable) +KBUILD_CFLAGS += $(call cc-disable-warning, unused-const-variable) +KBUILD_CFLAGS += $(call cc-disable-warning, restrict) +KBUILD_CFLAGS += $(call cc-disable-warning, packed-not-aligned) +KBUILD_CFLAGS += $(call cc-disable-warning, format-overflow) +KBUILD_CFLAGS += $(call cc-disable-warning, format-truncation) +KBUILD_CFLAGS += $(call cc-disable-warning, stringop-truncation) ifdef CONFIG_CC_IS_CLANG -KBUILD_CFLAGS += -Wno-initializer-overrides # Clang before clang-16 would warn on default argument promotions. ifneq ($(call clang-min-version, 160000),y) # Disable -Wformat @@ -61,7 +128,6 @@ ifeq ($(call clang-min-version, 120000),y) KBUILD_CFLAGS += -Wformat-insufficient-args endif endif -KBUILD_CFLAGS += -Wno-sign-compare KBUILD_CFLAGS += $(call cc-disable-warning, pointer-to-enum-cast) KBUILD_CFLAGS += -Wno-tautological-constant-out-of-range-compare KBUILD_CFLAGS += $(call cc-disable-warning, unaligned-access) @@ -83,8 +149,25 @@ KBUILD_CFLAGS += -Wtype-limits KBUILD_CFLAGS += $(call cc-option, -Wmaybe-uninitialized) KBUILD_CFLAGS += $(call cc-option, -Wunused-macros) +ifdef CONFIG_CC_IS_CLANG +KBUILD_CFLAGS += -Winitializer-overrides +endif + KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN2 +else + +# The following turn off the warnings enabled by -Wextra +KBUILD_CFLAGS += -Wno-missing-field-initializers +KBUILD_CFLAGS += -Wno-type-limits +KBUILD_CFLAGS += -Wno-shift-negative-value + +ifdef CONFIG_CC_IS_CLANG +KBUILD_CFLAGS += -Wno-initializer-overrides +else +KBUILD_CFLAGS += -Wno-maybe-uninitialized +endif + endif # @@ -106,6 +189,11 @@ KBUILD_CFLAGS += $(call cc-option, -Wpacked-bitfield-compat) KBUILD_CPPFLAGS += -DKBUILD_EXTRA_WARN3 +else + +# The following turn off the warnings enabled by -Wextra +KBUILD_CFLAGS += -Wno-sign-compare + endif # diff --git a/scripts/Makefile.host b/scripts/Makefile.host index 8f7f842b54f9..08d83d9db31a 100644 --- a/scripts/Makefile.host +++ b/scripts/Makefile.host @@ -91,6 +91,8 @@ hostcxx_flags = -Wp,-MMD,$(depfile) \ # current working directory, which may be not accessible in the out-of-tree # modules case. hostrust_flags = --out-dir $(dir $@) --emit=dep-info=$(depfile) \ + -Clinker-flavor=gcc -Clinker=$(HOSTCC) \ + -Clink-args='$(call escsq,$(KBUILD_HOSTLDFLAGS))' \ $(KBUILD_HOSTRUSTFLAGS) $(HOST_EXTRARUSTFLAGS) \ $(HOSTRUSTFLAGS_$(target-stem)) diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib index 68d0134bdbf9..cd5b181060f1 100644 --- a/scripts/Makefile.lib +++ b/scripts/Makefile.lib @@ -83,8 +83,8 @@ dtb-$(CONFIG_OF_ALL_DTBS) += $(dtb-) multi-dtb-y := $(call multi-search, $(dtb-y), .dtb, -dtbs) # Primitive DTB compiled from *.dts real-dtb-y := $(call real-search, $(dtb-y), .dtb, -dtbs) -# Base DTB that overlay is applied onto (each first word of $(*-dtbs) expansion) -base-dtb-y := $(foreach m, $(multi-dtb-y), $(firstword $(call suffix-search, $m, .dtb, -dtbs))) +# Base DTB that overlay is applied onto +base-dtb-y := $(filter %.dtb, $(call real-search, $(multi-dtb-y), .dtb, -dtbs)) always-y += $(dtb-y) @@ -487,14 +487,14 @@ UIMAGE_OPTS-y ?= UIMAGE_TYPE ?= kernel UIMAGE_LOADADDR ?= arch_must_set_this UIMAGE_ENTRYADDR ?= $(UIMAGE_LOADADDR) -UIMAGE_NAME ?= 'Linux-$(KERNELRELEASE)' +UIMAGE_NAME ?= Linux-$(KERNELRELEASE) quiet_cmd_uimage = UIMAGE $@ cmd_uimage = $(BASH) $(MKIMAG |