diff options
Diffstat (limited to 'arch/x86/Makefile')
| -rw-r--r-- | arch/x86/Makefile | 45 |
1 files changed, 17 insertions, 28 deletions
diff --git a/arch/x86/Makefile b/arch/x86/Makefile index 1c4d012550ec..5b562e464009 100644 --- a/arch/x86/Makefile +++ b/arch/x86/Makefile @@ -31,8 +31,7 @@ endif CODE16GCC_CFLAGS := -m32 -Wa,$(srctree)/arch/x86/boot/code16gcc.h M16_CFLAGS := $(call cc-option, -m16, $(CODE16GCC_CFLAGS)) -REALMODE_CFLAGS := $(M16_CFLAGS) -g -Os -D__KERNEL__ \ - -DDISABLE_BRANCH_PROFILING \ +REALMODE_CFLAGS := $(M16_CFLAGS) -g -Os -DDISABLE_BRANCH_PROFILING \ -Wall -Wstrict-prototypes -march=i386 -mregparm=3 \ -fno-strict-aliasing -fomit-frame-pointer -fno-pic \ -mno-mmx -mno-sse @@ -81,11 +80,6 @@ ifeq ($(CONFIG_X86_32),y) # alignment instructions. KBUILD_CFLAGS += $(call cc-option,$(cc_stack_align4)) - # Disable unit-at-a-time mode on pre-gcc-4.0 compilers, it makes gcc use - # a lot more stack due to the lack of sharing of stacklots: - KBUILD_CFLAGS += $(call cc-ifversion, -lt, 0400, \ - $(call cc-option,-fno-unit-at-a-time)) - # CPU-specific tuning. Anything which can be shared with UML should go here. include arch/x86/Makefile_32.cpu KBUILD_CFLAGS += $(cflags-y) @@ -95,7 +89,7 @@ ifeq ($(CONFIG_X86_32),y) else BITS := 64 UTS_MACHINE := x86_64 - CHECKFLAGS += -D__x86_64__ -m64 + CHECKFLAGS += -D__x86_64__ biarch := -m64 KBUILD_AFLAGS += -m64 @@ -181,18 +175,6 @@ ifdef CONFIG_FUNCTION_GRAPH_TRACER endif endif -# -# Jump labels need '-maccumulate-outgoing-args' for gcc < 4.5.2 to prevent a -# GCC bug (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=46226). There's no way -# to test for this bug at compile-time because the test case needs to execute, -# which is a no-go for cross compilers. So check the GCC version instead. -# -ifdef CONFIG_JUMP_LABEL - ifneq ($(ACCUMULATE_OUTGOING_ARGS), 1) - ACCUMULATE_OUTGOING_ARGS = $(call cc-if-fullversion, -lt, 040502, 1) - endif -endif - ifeq ($(ACCUMULATE_OUTGOING_ARGS), 1) # This compiler flag is not supported by Clang: KBUILD_CFLAGS += $(call cc-option,-maccumulate-outgoing-args,) @@ -211,7 +193,6 @@ cfi-sections := $(call as-instr,.cfi_sections .debug_frame,-DCONFIG_AS_CFI_SECTI # does binutils support specific instructions? asinstr := $(call as-instr,fxsaveq (%rax),-DCONFIG_AS_FXSAVEQ=1) asinstr += $(call as-instr,pshufb %xmm0$(comma)%xmm0,-DCONFIG_AS_SSSE3=1) -asinstr += $(call as-instr,crc32l %eax$(comma)%eax,-DCONFIG_AS_CRC32=1) avx_instr := $(call as-instr,vxorps %ymm0$(comma)%ymm1$(comma)%ymm2,-DCONFIG_AS_AVX=1) avx2_instr :=$(call as-instr,vpbroadcastb %xmm0$(comma)%ymm1,-DCONFIG_AS_AVX2=1) avx512_instr :=$(call as-instr,vpmovm2b %k1$(comma)%zmm5,-DCONFIG_AS_AVX512=1) @@ -221,7 +202,7 @@ sha256_ni_instr :=$(call as-instr,sha256msg1 %xmm0$(comma)%xmm1,-DCONFIG_AS_SHA2 KBUILD_AFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) KBUILD_CFLAGS += $(cfi) $(cfi-sigframe) $(cfi-sections) $(asinstr) $(avx_instr) $(avx2_instr) $(avx512_instr) $(sha1_ni_instr) $(sha256_ni_instr) -LDFLAGS := -m elf_$(UTS_MACHINE) +KBUILD_LDFLAGS := -m elf_$(UTS_MACHINE) # # The 64-bit kernel must be aligned to 2MB. Pass -z max-page-size=0x200000 to @@ -229,7 +210,7 @@ LDFLAGS := -m elf_$(UTS_MACHINE) # by the linker. # ifdef CONFIG_X86_64 -LDFLAGS += $(call ld-option, -z max-page-size=0x200000) +KBUILD_LDFLAGS += $(call ld-option, -z max-page-size=0x200000) endif # Speed up the build @@ -255,10 +236,12 @@ archscripts: scripts_basic archheaders: $(Q)$(MAKE) $(build)=arch/x86/entry/syscalls all -archprepare: -ifeq ($(CONFIG_KEXEC_FILE),y) - $(Q)$(MAKE) $(build)=arch/x86/purgatory arch/x86/purgatory/kexec-purgatory.c -endif +archmacros: + $(Q)$(MAKE) $(build)=arch/x86/kernel arch/x86/kernel/macros.s + +ASM_MACRO_FLAGS = -Wa,arch/x86/kernel/macros.s -Wa,- +export ASM_MACRO_FLAGS +KBUILD_CFLAGS += $(ASM_MACRO_FLAGS) ### # Kernel objects @@ -319,12 +302,18 @@ PHONY += vdso_install vdso_install: $(Q)$(MAKE) $(build)=arch/x86/entry/vdso $@ +archprepare: checkbin +checkbin: +ifndef CC_HAVE_ASM_GOTO + @echo Compiler lacks asm-goto support. + @exit 1 +endif + archclean: $(Q)rm -rf $(objtree)/arch/i386 $(Q)rm -rf $(objtree)/arch/x86_64 $(Q)$(MAKE) $(clean)=$(boot) $(Q)$(MAKE) $(clean)=arch/x86/tools - $(Q)$(MAKE) $(clean)=arch/x86/purgatory define archhelp echo '* bzImage - Compressed kernel image (arch/x86/boot/bzImage)' |