1#
  2# This file is included by the global makefile so that you can add your own
  3# architecture-specific flags and dependencies.
  4#
  5# Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  6# Licensed under the GPL
  7#
  8
  9# select defconfig based on actual architecture
 10ifeq ($(SUBARCH),x86)
 11  ifeq ($(shell uname -m),x86_64)
 12        KBUILD_DEFCONFIG := x86_64_defconfig
 13  else
 14        KBUILD_DEFCONFIG := i386_defconfig
 15  endif
 16else
 17        KBUILD_DEFCONFIG := $(SUBARCH)_defconfig
 18endif
 19
 20ARCH_DIR := arch/um
 21OS := $(shell uname -s)
 22# We require bash because the vmlinux link and loader script cpp use bash
 23# features.
 24SHELL := /bin/bash
 25
 26core-y			+= $(ARCH_DIR)/kernel/		\
 27			   $(ARCH_DIR)/drivers/		\
 28			   $(ARCH_DIR)/os-$(OS)/
 29
 30MODE_INCLUDE	+= -I$(srctree)/$(ARCH_DIR)/include/shared/skas
 31
 32HEADER_ARCH 	:= $(SUBARCH)
 33
 34ifneq ($(filter $(SUBARCH),x86 x86_64 i386),)
 35	HEADER_ARCH := x86
 36endif
 37
 38ifdef CONFIG_64BIT
 39	KBUILD_CFLAGS += -mcmodel=large
 40endif
 41
 42HOST_DIR := arch/$(HEADER_ARCH)
 43
 44include $(ARCH_DIR)/Makefile-skas
 45include $(HOST_DIR)/Makefile.um
 46
 47core-y += $(HOST_DIR)/um/
 48
 49SHARED_HEADERS	:= $(ARCH_DIR)/include/shared
 50ARCH_INCLUDE	:= -I$(srctree)/$(SHARED_HEADERS)
 51ARCH_INCLUDE	+= -I$(srctree)/$(HOST_DIR)/um/shared
 52KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/um
 53
 54# -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
 55# named - it's a common symbol in libpcap, so we get a binary which crashes.
 56#
 57# Same things for in6addr_loopback and mktime - found in libc. For these two we
 58# only get link-time error, luckily.
 59#
 60# -Dlongjmp=kernel_longjmp prevents anything from referencing the libpthread.a
 61# embedded copy of longjmp, same thing for setjmp.
 62#
 63# These apply to USER_CFLAGS to.
 64
 65KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ \
 66	$(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap	\
 67	-Dlongjmp=kernel_longjmp -Dsetjmp=kernel_setjmp \
 68	-Din6addr_loopback=kernel_in6addr_loopback \
 69	-Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
 70
 
 
 71KBUILD_AFLAGS += $(ARCH_INCLUDE)
 72
 73USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \
 74		$(ARCH_INCLUDE) $(MODE_INCLUDE) $(filter -I%,$(CFLAGS)) \
 75		-D_FILE_OFFSET_BITS=64 -idirafter $(srctree)/include \
 76		-idirafter $(objtree)/include -D__KERNEL__ -D__UM_HOST__
 77
 78#This will adjust *FLAGS accordingly to the platform.
 79include $(ARCH_DIR)/Makefile-os-$(OS)
 80
 81KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \
 82		   -I$(srctree)/$(HOST_DIR)/include/uapi \
 83		   -I$(objtree)/$(HOST_DIR)/include/generated \
 84		   -I$(objtree)/$(HOST_DIR)/include/generated/uapi
 85
 86# -Derrno=kernel_errno - This turns all kernel references to errno into
 87# kernel_errno to separate them from the libc errno.  This allows -fno-common
 88# in KBUILD_CFLAGS.  Otherwise, it would cause ld to complain about the two different
 89# errnos.
 90# These apply to kernelspace only.
 91#
 92# strip leading and trailing whitespace to make the USER_CFLAGS removal of these
 93# defines more robust
 94
 95KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
 96			 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
 97KBUILD_CFLAGS += $(KERNEL_DEFINES)
 98
 99PHONY += linux
100
101all: linux
102
103linux: vmlinux
104	@echo '  LINK $@'
105	$(Q)ln -f $< $@
106
107define archhelp
108  echo '* linux		- Binary kernel image (./linux) - for backward'
109  echo '		   compatibility only, this creates a hard link to the'
110  echo '		   real kernel binary, the "vmlinux" binary you'
111  echo '		   find in the kernel root.'
112endef
113
114archheaders:
115	$(Q)$(MAKE) -f $(srctree)/Makefile ARCH=$(HEADER_ARCH) asm-generic archheaders
116
117archprepare:
118	$(Q)$(MAKE) $(build)=$(HOST_DIR)/um include/generated/user_constants.h
119
120LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
121LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib $(call cc-option, -no-pie)
 
 
 
122
123CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
124	-fno-stack-protector $(call cc-option, -fno-stack-protector-all)
125
126# Options used by linker script
127export LDS_START      := $(START)
128export LDS_ELF_ARCH   := $(ELF_ARCH)
129export LDS_ELF_FORMAT := $(ELF_FORMAT)
130
131# The wrappers will select whether using "malloc" or the kernel allocator.
132LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
133
134LD_FLAGS_CMDLINE = $(foreach opt,$(KBUILD_LDFLAGS),-Wl,$(opt))
 
 
 
 
 
 
 
135
136# Used by link-vmlinux.sh which has special support for um link
137export CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
138
139# When cleaning we don't include .config, so we don't include
140# TT or skas makefiles and don't clean skas_ptregs.h.
141CLEAN_FILES += linux x.i gmon.out
142MRPROPER_FILES += arch/$(SUBARCH)/include/generated
143
144archclean:
145	@find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
146		-o -name '*.gcov' \) -type f -print | xargs rm -f
147
148export HEADER_ARCH SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH

  1#
  2# This file is included by the global makefile so that you can add your own
  3# architecture-specific flags and dependencies.
  4#
  5# Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  6# Licensed under the GPL
  7#
  8
  9# select defconfig based on actual architecture
 10ifeq ($(SUBARCH),x86)
 11  ifeq ($(shell uname -m),x86_64)
 12        KBUILD_DEFCONFIG := x86_64_defconfig
 13  else
 14        KBUILD_DEFCONFIG := i386_defconfig
 15  endif
 16else
 17        KBUILD_DEFCONFIG := $(SUBARCH)_defconfig
 18endif
 19
 20ARCH_DIR := arch/um
 
 21# We require bash because the vmlinux link and loader script cpp use bash
 22# features.
 23SHELL := /bin/bash
 24
 
 
 
 
 25MODE_INCLUDE	+= -I$(srctree)/$(ARCH_DIR)/include/shared/skas
 26
 27HEADER_ARCH 	:= $(SUBARCH)
 28
 29ifneq ($(filter $(SUBARCH),x86 x86_64 i386),)
 30	HEADER_ARCH := x86
 31endif
 32
 33ifdef CONFIG_64BIT
 34	KBUILD_CFLAGS += -mcmodel=large
 35endif
 36
 37HOST_DIR := arch/$(HEADER_ARCH)
 38
 39include $(srctree)/$(ARCH_DIR)/Makefile-skas
 40include $(srctree)/$(HOST_DIR)/Makefile.um
 41
 42core-y += $(HOST_DIR)/um/
 43
 44SHARED_HEADERS	:= $(ARCH_DIR)/include/shared
 45ARCH_INCLUDE	:= -I$(srctree)/$(SHARED_HEADERS)
 46ARCH_INCLUDE	+= -I$(srctree)/$(HOST_DIR)/um/shared
 47KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/um
 48
 49# -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
 50# named - it's a common symbol in libpcap, so we get a binary which crashes.
 51#
 52# Same things for in6addr_loopback and mktime - found in libc. For these two we
 53# only get link-time error, luckily.
 54#
 55# -Dlongjmp=kernel_longjmp prevents anything from referencing the libpthread.a
 56# embedded copy of longjmp, same thing for setjmp.
 57#
 58# These apply to USER_CFLAGS to.
 59
 60KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ \
 61	$(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap	\
 62	-Dlongjmp=kernel_longjmp -Dsetjmp=kernel_setjmp \
 63	-Din6addr_loopback=kernel_in6addr_loopback \
 64	-Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
 65
 66KBUILD_RUSTFLAGS += -Crelocation-model=pie
 67
 68KBUILD_AFLAGS += $(ARCH_INCLUDE)
 69
 70USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \
 71		$(ARCH_INCLUDE) $(MODE_INCLUDE) $(filter -I%,$(CFLAGS)) \
 72		-D_FILE_OFFSET_BITS=64 -idirafter $(srctree)/include \
 73		-idirafter $(objtree)/include -D__KERNEL__ -D__UM_HOST__
 74
 75#This will adjust *FLAGS accordingly to the platform.
 76include $(srctree)/$(ARCH_DIR)/Makefile-os-Linux
 77
 78KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \
 79		   -I$(srctree)/$(HOST_DIR)/include/uapi \
 80		   -I$(objtree)/$(HOST_DIR)/include/generated \
 81		   -I$(objtree)/$(HOST_DIR)/include/generated/uapi
 82
 83# -Derrno=kernel_errno - This turns all kernel references to errno into
 84# kernel_errno to separate them from the libc errno.  This allows -fno-common
 85# in KBUILD_CFLAGS.  Otherwise, it would cause ld to complain about the two different
 86# errnos.
 87# These apply to kernelspace only.
 88#
 89# strip leading and trailing whitespace to make the USER_CFLAGS removal of these
 90# defines more robust
 91
 92KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
 93			 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
 94KBUILD_CFLAGS += $(KERNEL_DEFINES)
 95
 96PHONY += linux
 97
 98all: linux
 99
100linux: vmlinux
101	@echo '  LINK $@'
102	$(Q)ln -f $< $@
103
104define archhelp
105  echo '* linux		- Binary kernel image (./linux) - for backward'
106  echo '		   compatibility only, this creates a hard link to the'
107  echo '		   real kernel binary, the "vmlinux" binary you'
108  echo '		   find in the kernel root.'
109endef
110
111archheaders:
112	$(Q)$(MAKE) -f $(srctree)/Makefile ARCH=$(HEADER_ARCH) asm-generic archheaders
113
114archprepare:
115	$(Q)$(MAKE) $(build)=$(HOST_DIR)/um include/generated/user_constants.h
116
117LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
118ifdef CONFIG_LD_SCRIPT_DYN
119LINK-$(call gcc-min-version, 60100)$(CONFIG_CC_IS_CLANG) += -no-pie
120endif
121LINK-$(CONFIG_LD_SCRIPT_DYN_RPATH) += -Wl,-rpath,/lib
122
123CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
124	-fno-stack-protector $(call cc-option, -fno-stack-protector-all)
125
126# Options used by linker script
127export LDS_START      := $(START)
128export LDS_ELF_ARCH   := $(ELF_ARCH)
129export LDS_ELF_FORMAT := $(ELF_FORMAT)
130
131# The wrappers will select whether using "malloc" or the kernel allocator.
132LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
133
134# Avoid binutils 2.39+ warnings by marking the stack non-executable and
135# ignorning warnings for the kallsyms sections.
136LDFLAGS_EXECSTACK = -z noexecstack
137ifeq ($(CONFIG_LD_IS_BFD),y)
138LDFLAGS_EXECSTACK += $(call ld-option,--no-warn-rwx-segments)
139endif
140
141LD_FLAGS_CMDLINE = $(foreach opt,$(KBUILD_LDFLAGS) $(LDFLAGS_EXECSTACK),-Wl,$(opt))
142
143# Used by link-vmlinux.sh which has special support for um link
144export CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE) $(CC_FLAGS_LTO)
145
146# When cleaning we don't include .config, so we don't include
147# TT or skas makefiles and don't clean skas_ptregs.h.
148CLEAN_FILES += linux x.i gmon.out
149MRPROPER_FILES += $(HOST_DIR)/include/generated
150
151archclean:
152	@find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
153		-o -name '*.gcov' \) -type f -print | xargs rm -f
154
155export HEADER_ARCH SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING DEV_NULL_PATH