Commit | Line | Data |
---|---|---|
4f193362 PS |
1 | # |
2 | # This file is included by the global makefile so that you can add your own | |
3 | # architecture-specific flags and dependencies. | |
4 | # | |
4c9e1385 | 5 | # Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
1da177e4 LT |
6 | # Licensed under the GPL |
7 | # | |
8 | ||
e40f04d0 RR |
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 | ||
1da177e4 LT |
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 | ||
1da177e4 LT |
26 | core-y += $(ARCH_DIR)/kernel/ \ |
27 | $(ARCH_DIR)/drivers/ \ | |
28 | $(ARCH_DIR)/os-$(OS)/ | |
29 | ||
8569c914 | 30 | MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/shared/skas |
1da177e4 | 31 | |
7bbe7204 AV |
32 | HEADER_ARCH := $(SUBARCH) |
33 | ||
fff6540c RW |
34 | ifneq ($(filter $(SUBARCH),x86 x86_64 i386),) |
35 | HEADER_ARCH := x86 | |
7bbe7204 | 36 | endif |
fff6540c RW |
37 | |
38 | ifdef CONFIG_64BIT | |
12783aa0 | 39 | KBUILD_CFLAGS += -mcmodel=large |
7bbe7204 AV |
40 | endif |
41 | ||
5c48b108 AV |
42 | HOST_DIR := arch/$(HEADER_ARCH) |
43 | ||
d8285639 MY |
44 | include $(srctree)/$(ARCH_DIR)/Makefile-skas |
45 | include $(srctree)/$(HOST_DIR)/Makefile.um | |
5c48b108 AV |
46 | |
47 | core-y += $(HOST_DIR)/um/ | |
1da177e4 | 48 | |
22409f9c AV |
49 | SHARED_HEADERS := $(ARCH_DIR)/include/shared |
50 | ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS) | |
5c48b108 AV |
51 | ARCH_INCLUDE += -I$(srctree)/$(HOST_DIR)/um/shared |
52 | KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/um | |
1da177e4 | 53 | |
98105d47 PBG |
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. | |
fd748104 | 56 | # |
98105d47 PBG |
57 | # Same things for in6addr_loopback and mktime - found in libc. For these two we |
58 | # only get link-time error, luckily. | |
59 | # | |
f44f1e7d FF |
60 | # -Dlongjmp=kernel_longjmp prevents anything from referencing the libpthread.a |
61 | # embedded copy of longjmp, same thing for setjmp. | |
62 | # | |
98105d47 | 63 | # These apply to USER_CFLAGS to. |
1da177e4 | 64 | |
dc5be20a | 65 | KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ \ |
98105d47 | 66 | $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \ |
f44f1e7d | 67 | -Dlongjmp=kernel_longjmp -Dsetjmp=kernel_setjmp \ |
818f6ef4 | 68 | -Din6addr_loopback=kernel_in6addr_loopback \ |
2c51a4bc | 69 | -Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr |
fd748104 | 70 | |
905a7707 DG |
71 | KBUILD_RUSTFLAGS += -Crelocation-model=pie |
72 | ||
222d394d | 73 | KBUILD_AFLAGS += $(ARCH_INCLUDE) |
1da177e4 | 74 | |
298e20ba RW |
75 | USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \ |
76 | $(ARCH_INCLUDE) $(MODE_INCLUDE) $(filter -I%,$(CFLAGS)) \ | |
0b5aedfe | 77 | -D_FILE_OFFSET_BITS=64 -idirafter $(srctree)/include \ |
75dd4747 | 78 | -idirafter $(objtree)/include -D__KERNEL__ -D__UM_HOST__ |
d45e44d4 | 79 | |
d45e44d4 | 80 | #This will adjust *FLAGS accordingly to the platform. |
d8285639 | 81 | include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS) |
ecc354a9 | 82 | |
c9b284b2 | 83 | KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \ |
abbf1590 | 84 | -I$(srctree)/$(HOST_DIR)/include/uapi \ |
58ab5e0c AB |
85 | -I$(objtree)/$(HOST_DIR)/include/generated \ |
86 | -I$(objtree)/$(HOST_DIR)/include/generated/uapi | |
1de1502c | 87 | |
ecc354a9 PBG |
88 | # -Derrno=kernel_errno - This turns all kernel references to errno into |
89 | # kernel_errno to separate them from the libc errno. This allows -fno-common | |
a0f97e06 | 90 | # in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different |
ecc354a9 | 91 | # errnos. |
98105d47 | 92 | # These apply to kernelspace only. |
f15cf515 JD |
93 | # |
94 | # strip leading and trailing whitespace to make the USER_CFLAGS removal of these | |
95 | # defines more robust | |
ecc354a9 | 96 | |
f15cf515 JD |
97 | KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \ |
98 | -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES)) | |
a0f97e06 | 99 | KBUILD_CFLAGS += $(KERNEL_DEFINES) |
1da177e4 | 100 | |
4f193362 | 101 | PHONY += linux |
1da177e4 LT |
102 | |
103 | all: linux | |
104 | ||
105 | linux: vmlinux | |
a4b741e3 | 106 | @echo ' LINK $@' |
cb8aa3d2 | 107 | $(Q)ln -f $< $@ |
1da177e4 LT |
108 | |
109 | define archhelp | |
110 | echo '* linux - Binary kernel image (./linux) - for backward' | |
111 | echo ' compatibility only, this creates a hard link to the' | |
4b3f686d | 112 | echo ' real kernel binary, the "vmlinux" binary you' |
1da177e4 LT |
113 | echo ' find in the kernel root.' |
114 | endef | |
115 | ||
c9b284b2 | 116 | archheaders: |
0004438a | 117 | $(Q)$(MAKE) -f $(srctree)/Makefile ARCH=$(HEADER_ARCH) asm-generic archheaders |
699d7a57 | 118 | |
65bba042 MY |
119 | archprepare: |
120 | $(Q)$(MAKE) $(build)=$(HOST_DIR)/um include/generated/user_constants.h | |
1da177e4 LT |
121 | |
122 | LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static | |
386093c6 JB |
123 | LINK-$(CONFIG_LD_SCRIPT_DYN) += $(call cc-option, -no-pie) |
124 | LINK-$(CONFIG_LD_SCRIPT_DYN_RPATH) += -Wl,-rpath,/lib | |
1da177e4 | 125 | |
275e6e1e | 126 | CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \ |
893ab004 | 127 | -fno-stack-protector $(call cc-option, -fno-stack-protector-all) |
275e6e1e | 128 | |
51b563fc SR |
129 | # Options used by linker script |
130 | export LDS_START := $(START) | |
131 | export LDS_ELF_ARCH := $(ELF_ARCH) | |
132 | export LDS_ELF_FORMAT := $(ELF_FORMAT) | |
1da177e4 | 133 | |
4c9e1385 | 134 | # The wrappers will select whether using "malloc" or the kernel allocator. |
1da177e4 LT |
135 | LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc |
136 | ||
bd71558d DG |
137 | # Avoid binutils 2.39+ warnings by marking the stack non-executable and |
138 | # ignorning warnings for the kallsyms sections. | |
139 | LDFLAGS_EXECSTACK = -z noexecstack | |
140 | ifeq ($(CONFIG_LD_IS_BFD),y) | |
141 | LDFLAGS_EXECSTACK += $(call ld-option,--no-warn-rwx-segments) | |
142 | endif | |
143 | ||
6aa56115 | 144 | LD_FLAGS_CMDLINE = $(foreach opt,$(KBUILD_LDFLAGS) $(LDFLAGS_EXECSTACK),-Wl,$(opt)) |
0ba7fe03 | 145 | |
1f2bfbd0 | 146 | # Used by link-vmlinux.sh which has special support for um link |
83e913f5 | 147 | export CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE) $(CC_FLAGS_LTO) |
1da177e4 | 148 | |
4c9e1385 JD |
149 | # When cleaning we don't include .config, so we don't include |
150 | # TT or skas makefiles and don't clean skas_ptregs.h. | |
9e636452 | 151 | CLEAN_FILES += linux x.i gmon.out |
0663c68c | 152 | MRPROPER_FILES += arch/$(SUBARCH)/include/generated |
1da177e4 | 153 | |
1da177e4 | 154 | archclean: |
1da177e4 LT |
155 | @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \ |
156 | -o -name '*.gcov' \) -type f -print | xargs rm -f | |
157 | ||
79b05c1f | 158 | export HEADER_ARCH SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH |