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Commit | Line | Data |
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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 | ||
9 | ARCH_DIR := arch/um | |
10 | OS := $(shell uname -s) | |
11 | # We require bash because the vmlinux link and loader script cpp use bash | |
12 | # features. | |
13 | SHELL := /bin/bash | |
14 | ||
15 | filechk_gen_header = $< | |
16 | ||
17 | core-y += $(ARCH_DIR)/kernel/ \ | |
18 | $(ARCH_DIR)/drivers/ \ | |
19 | $(ARCH_DIR)/os-$(OS)/ | |
20 | ||
8569c914 | 21 | MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/shared/skas |
1da177e4 | 22 | |
42fda663 | 23 | include $(srctree)/$(ARCH_DIR)/Makefile-skas |
1da177e4 | 24 | |
22409f9c AV |
25 | SHARED_HEADERS := $(ARCH_DIR)/include/shared |
26 | ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS) | |
aa7bd942 | 27 | ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH)/shared |
fd7aab9c | 28 | ifneq ($(KBUILD_SRC),) |
22409f9c | 29 | ARCH_INCLUDE += -I$(SHARED_HEADERS) |
fd7aab9c | 30 | endif |
aa7bd942 | 31 | KBUILD_CPPFLAGS += -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH) |
1da177e4 | 32 | |
98105d47 PBG |
33 | # -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so |
34 | # named - it's a common symbol in libpcap, so we get a binary which crashes. | |
fd748104 | 35 | # |
98105d47 PBG |
36 | # Same things for in6addr_loopback and mktime - found in libc. For these two we |
37 | # only get link-time error, luckily. | |
38 | # | |
39 | # These apply to USER_CFLAGS to. | |
1da177e4 | 40 | |
260c0cb8 | 41 | KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \ |
98105d47 | 42 | $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \ |
818f6ef4 JD |
43 | -Din6addr_loopback=kernel_in6addr_loopback \ |
44 | -Din6addr_any=kernel_in6addr_any | |
fd748104 | 45 | |
222d394d | 46 | KBUILD_AFLAGS += $(ARCH_INCLUDE) |
1da177e4 | 47 | |
d45e44d4 | 48 | USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\ |
a0f97e06 | 49 | $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \ |
260c0cb8 | 50 | $(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64 |
d45e44d4 | 51 | |
52 | include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH) | |
53 | ||
54 | #This will adjust *FLAGS accordingly to the platform. | |
55 | include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS) | |
ecc354a9 | 56 | |
1de1502c AV |
57 | KBUILD_CPPFLAGS += -I$(srctree)/arch/$(HEADER_ARCH)/include |
58 | ||
ecc354a9 PBG |
59 | # -Derrno=kernel_errno - This turns all kernel references to errno into |
60 | # kernel_errno to separate them from the libc errno. This allows -fno-common | |
a0f97e06 | 61 | # in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different |
ecc354a9 | 62 | # errnos. |
98105d47 | 63 | # These apply to kernelspace only. |
f15cf515 JD |
64 | # |
65 | # strip leading and trailing whitespace to make the USER_CFLAGS removal of these | |
66 | # defines more robust | |
ecc354a9 | 67 | |
f15cf515 JD |
68 | KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \ |
69 | -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES)) | |
a0f97e06 | 70 | KBUILD_CFLAGS += $(KERNEL_DEFINES) |
1da177e4 | 71 | |
4f193362 | 72 | PHONY += linux |
1da177e4 LT |
73 | |
74 | all: linux | |
75 | ||
76 | linux: vmlinux | |
a4b741e3 | 77 | @echo ' LINK $@' |
cb8aa3d2 | 78 | $(Q)ln -f $< $@ |
1da177e4 LT |
79 | |
80 | define archhelp | |
81 | echo '* linux - Binary kernel image (./linux) - for backward' | |
82 | echo ' compatibility only, this creates a hard link to the' | |
4b3f686d | 83 | echo ' real kernel binary, the "vmlinux" binary you' |
1da177e4 LT |
84 | echo ' find in the kernel root.' |
85 | endef | |
86 | ||
61bee204 | 87 | KBUILD_KCONFIG := arch/um/Kconfig.$(HEADER_ARCH) |
1da177e4 | 88 | |
22409f9c AV |
89 | archprepare: $(SHARED_HEADERS)/user_constants.h |
90 | archprepare: $(SHARED_HEADERS)/kern_constants.h | |
1da177e4 LT |
91 | |
92 | LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static | |
93 | LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib | |
94 | ||
275e6e1e PBG |
95 | CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \ |
96 | $(call cc-option, -fno-stack-protector,) \ | |
97 | $(call cc-option, -fno-stack-protector-all,) | |
98 | ||
1da177e4 LT |
99 | CONFIG_KERNEL_STACK_ORDER ?= 2 |
100 | STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] ) | |
101 | ||
42fda663 JD |
102 | CPPFLAGS_vmlinux.lds = -U$(SUBARCH) -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \ |
103 | -DELF_FORMAT="$(ELF_FORMAT)" -DKERNEL_STACK_SIZE=$(STACK_SIZE) | |
1da177e4 | 104 | |
4c9e1385 | 105 | # The wrappers will select whether using "malloc" or the kernel allocator. |
1da177e4 LT |
106 | LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc |
107 | ||
260c0cb8 | 108 | LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt)) |
0ba7fe03 JD |
109 | |
110 | CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE) | |
1da177e4 LT |
111 | define cmd_vmlinux__ |
112 | $(CC) $(CFLAGS_vmlinux) -o $@ \ | |
113 | -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \ | |
114 | -Wl,--start-group $(vmlinux-main) -Wl,--end-group \ | |
776cfebb | 115 | -lutil \ |
75473c1d | 116 | $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o \ |
1da177e4 LT |
117 | FORCE ,$^) ; rm -f linux |
118 | endef | |
119 | ||
4c9e1385 JD |
120 | # When cleaning we don't include .config, so we don't include |
121 | # TT or skas makefiles and don't clean skas_ptregs.h. | |
87e299e5 | 122 | CLEAN_FILES += linux x.i gmon.out \ |
22409f9c AV |
123 | $(SHARED_HEADERS)/user_constants.h \ |
124 | $(SHARED_HEADERS)/kern_constants.h | |
1da177e4 | 125 | |
1da177e4 | 126 | archclean: |
1da177e4 LT |
127 | @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \ |
128 | -o -name '*.gcov' \) -type f -print | xargs rm -f | |
129 | ||
1da177e4 | 130 | # Generated files |
4ee189a9 | 131 | |
cb8aa3d2 PBG |
132 | $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s: FORCE |
133 | $(Q)$(MAKE) $(build)=$(ARCH_DIR)/sys-$(SUBARCH) $@ | |
4ee189a9 | 134 | |
f64a227b SR |
135 | define filechk_gen-asm-offsets |
136 | (set -e; \ | |
f64a227b SR |
137 | echo "/*"; \ |
138 | echo " * DO NOT MODIFY."; \ | |
139 | echo " *"; \ | |
140 | echo " * This file was generated by arch/$(ARCH)/Makefile"; \ | |
141 | echo " *"; \ | |
142 | echo " */"; \ | |
143 | echo ""; \ | |
144 | sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \ | |
ecba97d4 | 145 | echo ""; ) |
f64a227b SR |
146 | endef |
147 | ||
22409f9c | 148 | $(SHARED_HEADERS)/user_constants.h: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s |
8d0b9dc9 AV |
149 | $(call filechk,gen-asm-offsets) |
150 | ||
22409f9c AV |
151 | $(SHARED_HEADERS)/kern_constants.h: |
152 | $(Q)mkdir -p $(dir $@) | |
153 | $(Q)echo '#include "../../../../include/asm/asm-offsets.h"' >$@ | |
1da177e4 | 154 | |
ec82c32d | 155 | export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS HEADER_ARCH DEV_NULL_PATH |