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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
9ARCH_DIR := arch/um
10OS := $(shell uname -s)
11# We require bash because the vmlinux link and loader script cpp use bash
12# features.
13SHELL := /bin/bash
14
15filechk_gen_header = $<
16
17core-y += $(ARCH_DIR)/kernel/ \
18 $(ARCH_DIR)/drivers/ \
19 $(ARCH_DIR)/os-$(OS)/
20
21MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/shared/skas
22
23HEADER_ARCH := $(SUBARCH)
24
25# Additional ARCH settings for x86
26ifeq ($(SUBARCH),i386)
27 HEADER_ARCH := x86
28endif
29ifeq ($(SUBARCH),x86_64)
30 HEADER_ARCH := x86
31 KBUILD_CFLAGS += -mcmodel=large
32endif
33
34HOST_DIR := arch/$(HEADER_ARCH)
35
36include $(srctree)/$(ARCH_DIR)/Makefile-skas
37include $(srctree)/$(HOST_DIR)/Makefile.um
38
39core-y += $(HOST_DIR)/um/
40
41SHARED_HEADERS := $(ARCH_DIR)/include/shared
42ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS)
43ARCH_INCLUDE += -I$(srctree)/$(HOST_DIR)/um/shared
44KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/um
45
46# -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
47# named - it's a common symbol in libpcap, so we get a binary which crashes.
48#
49# Same things for in6addr_loopback and mktime - found in libc. For these two we
50# only get link-time error, luckily.
51#
52# These apply to USER_CFLAGS to.
53
54KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ \
55 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
56 -Din6addr_loopback=kernel_in6addr_loopback \
57 -Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
58
59KBUILD_AFLAGS += $(ARCH_INCLUDE)
60
61USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
62 $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
63 $(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64 -idirafter include
64
65#This will adjust *FLAGS accordingly to the platform.
66include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
67
68KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \
69 -I$(HOST_DIR)/include/generated
70
71# -Derrno=kernel_errno - This turns all kernel references to errno into
72# kernel_errno to separate them from the libc errno. This allows -fno-common
73# in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different
74# errnos.
75# These apply to kernelspace only.
76#
77# strip leading and trailing whitespace to make the USER_CFLAGS removal of these
78# defines more robust
79
80KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
81 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
82KBUILD_CFLAGS += $(KERNEL_DEFINES)
83
84PHONY += linux
85
86all: linux
87
88linux: vmlinux
89 @echo ' LINK $@'
90 $(Q)ln -f $< $@
91
92define archhelp
93 echo '* linux - Binary kernel image (./linux) - for backward'
94 echo ' compatibility only, this creates a hard link to the'
95 echo ' real kernel binary, the "vmlinux" binary you'
96 echo ' find in the kernel root.'
97endef
98
99KBUILD_KCONFIG := $(HOST_DIR)/um/Kconfig
100
101archheaders:
102 $(Q)$(MAKE) -C '$(srctree)' KBUILD_SRC= \
103 ARCH=$(HEADER_ARCH) O='$(objtree)' archheaders
104
105archprepare: include/generated/user_constants.h
106
107LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
108LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
109
110CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
111 $(call cc-option, -fno-stack-protector,) \
112 $(call cc-option, -fno-stack-protector-all,)
113
114# Options used by linker script
115export LDS_START := $(START)
116export LDS_ELF_ARCH := $(ELF_ARCH)
117export LDS_ELF_FORMAT := $(ELF_FORMAT)
118
119# The wrappers will select whether using "malloc" or the kernel allocator.
120LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
121
122LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt))
123
124# Used by link-vmlinux.sh which has special support for um link
125export CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
126
127# When cleaning we don't include .config, so we don't include
128# TT or skas makefiles and don't clean skas_ptregs.h.
129CLEAN_FILES += linux x.i gmon.out
130
131archclean:
132 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
133 -o -name '*.gcov' \) -type f -print | xargs rm -f
134
135# Generated files
136
137$(HOST_DIR)/um/user-offsets.s: __headers FORCE
138 $(Q)$(MAKE) $(build)=$(HOST_DIR)/um $@
139
140define filechk_gen-asm-offsets
141 (set -e; \
142 echo "/*"; \
143 echo " * DO NOT MODIFY."; \
144 echo " *"; \
145 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
146 echo " *"; \
147 echo " */"; \
148 echo ""; \
149 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
150 echo ""; )
151endef
152
153include/generated/user_constants.h: $(HOST_DIR)/um/user-offsets.s
154 $(call filechk,gen-asm-offsets)
155
156export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH