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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 | |
10 | ifeq ($(SUBARCH),x86) | |
11 | ifeq ($(shell uname -m),x86_64) | |
12 | KBUILD_DEFCONFIG := x86_64_defconfig | |
13 | else | |
14 | KBUILD_DEFCONFIG := i386_defconfig | |
15 | endif | |
16 | else | |
17 | KBUILD_DEFCONFIG := $(SUBARCH)_defconfig | |
18 | endif | |
19 | ||
20 | ARCH_DIR := arch/um | |
21 | OS := $(shell uname -s) | |
22 | # We require bash because the vmlinux link and loader script cpp use bash | |
23 | # features. | |
24 | SHELL := /bin/bash | |
25 | ||
26 | filechk_gen_header = $< | |
27 | ||
28 | core-y += $(ARCH_DIR)/kernel/ \ | |
29 | $(ARCH_DIR)/drivers/ \ | |
30 | $(ARCH_DIR)/os-$(OS)/ | |
31 | ||
32 | MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/shared/skas | |
33 | ||
34 | HEADER_ARCH := $(SUBARCH) | |
35 | ||
36 | ifneq ($(filter $(SUBARCH),x86 x86_64 i386),) | |
37 | HEADER_ARCH := x86 | |
38 | endif | |
39 | ||
40 | ifdef CONFIG_64BIT | |
41 | KBUILD_CFLAGS += -mcmodel=large | |
42 | endif | |
43 | ||
44 | HOST_DIR := arch/$(HEADER_ARCH) | |
45 | ||
46 | include $(ARCH_DIR)/Makefile-skas | |
47 | include $(HOST_DIR)/Makefile.um | |
48 | ||
49 | core-y += $(HOST_DIR)/um/ | |
50 | ||
51 | SHARED_HEADERS := $(ARCH_DIR)/include/shared | |
52 | ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS) | |
53 | ARCH_INCLUDE += -I$(srctree)/$(HOST_DIR)/um/shared | |
54 | KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/um | |
55 | ||
56 | # -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so | |
57 | # named - it's a common symbol in libpcap, so we get a binary which crashes. | |
58 | # | |
59 | # Same things for in6addr_loopback and mktime - found in libc. For these two we | |
60 | # only get link-time error, luckily. | |
61 | # | |
62 | # These apply to USER_CFLAGS to. | |
63 | ||
64 | KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ \ | |
65 | $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \ | |
66 | -Din6addr_loopback=kernel_in6addr_loopback \ | |
67 | -Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr | |
68 | ||
69 | KBUILD_AFLAGS += $(ARCH_INCLUDE) | |
70 | ||
71 | USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \ | |
72 | $(ARCH_INCLUDE) $(MODE_INCLUDE) $(filter -I%,$(CFLAGS)) \ | |
73 | -D_FILE_OFFSET_BITS=64 -idirafter $(srctree)/include \ | |
74 | -idirafter $(obj)/include -D__KERNEL__ -D__UM_HOST__ | |
75 | ||
76 | #This will adjust *FLAGS accordingly to the platform. | |
77 | include $(ARCH_DIR)/Makefile-os-$(OS) | |
78 | ||
79 | KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \ | |
80 | -I$(srctree)/$(HOST_DIR)/include/uapi \ | |
81 | -I$(HOST_DIR)/include/generated \ | |
82 | -I$(HOST_DIR)/include/generated/uapi | |
83 | ||
84 | # -Derrno=kernel_errno - This turns all kernel references to errno into | |
85 | # kernel_errno to separate them from the libc errno. This allows -fno-common | |
86 | # in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different | |
87 | # errnos. | |
88 | # These apply to kernelspace only. | |
89 | # | |
90 | # strip leading and trailing whitespace to make the USER_CFLAGS removal of these | |
91 | # defines more robust | |
92 | ||
93 | KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \ | |
94 | -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES)) | |
95 | KBUILD_CFLAGS += $(KERNEL_DEFINES) | |
96 | ||
97 | PHONY += linux | |
98 | ||
99 | all: linux | |
100 | ||
101 | linux: vmlinux | |
102 | @echo ' LINK $@' | |
103 | $(Q)ln -f $< $@ | |
104 | ||
105 | define archhelp | |
106 | echo '* linux - Binary kernel image (./linux) - for backward' | |
107 | echo ' compatibility only, this creates a hard link to the' | |
108 | echo ' real kernel binary, the "vmlinux" binary you' | |
109 | echo ' find in the kernel root.' | |
110 | endef | |
111 | ||
112 | KBUILD_KCONFIG := $(HOST_DIR)/um/Kconfig | |
113 | ||
114 | archheaders: | |
115 | $(Q)$(MAKE) KBUILD_SRC= ARCH=$(HEADER_ARCH) archheaders | |
116 | ||
117 | archprepare: include/generated/user_constants.h | |
118 | ||
119 | LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static | |
120 | LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib | |
121 | ||
122 | CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \ | |
123 | $(call cc-option, -fno-stack-protector,) \ | |
124 | $(call cc-option, -fno-stack-protector-all,) | |
125 | ||
126 | # Options used by linker script | |
127 | export LDS_START := $(START) | |
128 | export LDS_ELF_ARCH := $(ELF_ARCH) | |
129 | export LDS_ELF_FORMAT := $(ELF_FORMAT) | |
130 | ||
131 | # The wrappers will select whether using "malloc" or the kernel allocator. | |
132 | LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc | |
133 | ||
134 | LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt)) | |
135 | ||
136 | # Used by link-vmlinux.sh which has special support for um link | |
137 | export 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. | |
141 | CLEAN_FILES += linux x.i gmon.out | |
142 | ||
143 | archclean: | |
144 | @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \ | |
145 | -o -name '*.gcov' \) -type f -print | xargs rm -f | |
146 | ||
147 | # Generated files | |
148 | ||
149 | $(HOST_DIR)/um/user-offsets.s: __headers FORCE | |
150 | $(Q)$(MAKE) $(build)=$(HOST_DIR)/um $@ | |
151 | ||
152 | define filechk_gen-asm-offsets | |
153 | (set -e; \ | |
154 | echo "/*"; \ | |
155 | echo " * DO NOT MODIFY."; \ | |
156 | echo " *"; \ | |
157 | echo " * This file was generated by arch/$(ARCH)/Makefile"; \ | |
158 | echo " *"; \ | |
159 | echo " */"; \ | |
160 | echo ""; \ | |
161 | sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ | |
162 | echo ""; ) | |
163 | endef | |
164 | ||
165 | include/generated/user_constants.h: $(HOST_DIR)/um/user-offsets.s | |
166 | $(call filechk,gen-asm-offsets) | |
167 | ||
168 | export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH |