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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
26filechk_gen_header = $<
27
28core-y += $(ARCH_DIR)/kernel/ \
29 $(ARCH_DIR)/drivers/ \
30 $(ARCH_DIR)/os-$(OS)/
31
32MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/shared/skas
33
34HEADER_ARCH := $(SUBARCH)
35
36ifneq ($(filter $(SUBARCH),x86 x86_64 i386),)
37 HEADER_ARCH := x86
38endif
39
40ifdef CONFIG_64BIT
41 KBUILD_CFLAGS += -mcmodel=large
42endif
43
44HOST_DIR := arch/$(HEADER_ARCH)
45
46include $(ARCH_DIR)/Makefile-skas
47include $(HOST_DIR)/Makefile.um
48
49core-y += $(HOST_DIR)/um/
50
51SHARED_HEADERS := $(ARCH_DIR)/include/shared
52ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS)
53ARCH_INCLUDE += -I$(srctree)/$(HOST_DIR)/um/shared
54KBUILD_CPPFLAGS += -I$(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# -Dlongjmp=kernel_longjmp prevents anything from referencing the libpthread.a
63# embedded copy of longjmp, same thing for setjmp.
64#
65# These apply to USER_CFLAGS to.
66
67KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ \
68 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
69 -Dlongjmp=kernel_longjmp -Dsetjmp=kernel_setjmp \
70 -Din6addr_loopback=kernel_in6addr_loopback \
71 -Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
72
73KBUILD_AFLAGS += $(ARCH_INCLUDE)
74
75USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \
76 $(ARCH_INCLUDE) $(MODE_INCLUDE) $(filter -I%,$(CFLAGS)) \
77 -D_FILE_OFFSET_BITS=64 -idirafter $(srctree)/include \
78 -idirafter $(obj)/include -D__KERNEL__ -D__UM_HOST__
79
80#This will adjust *FLAGS accordingly to the platform.
81include $(ARCH_DIR)/Makefile-os-$(OS)
82
83KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \
84 -I$(srctree)/$(HOST_DIR)/include/uapi \
85 -I$(objtree)/$(HOST_DIR)/include/generated \
86 -I$(objtree)/$(HOST_DIR)/include/generated/uapi
87
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
90# in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different
91# errnos.
92# These apply to kernelspace only.
93#
94# strip leading and trailing whitespace to make the USER_CFLAGS removal of these
95# defines more robust
96
97KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
98 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
99KBUILD_CFLAGS += $(KERNEL_DEFINES)
100
101PHONY += linux
102
103all: linux
104
105linux: vmlinux
106 @echo ' LINK $@'
107 $(Q)ln -f $< $@
108
109define archhelp
110 echo '* linux - Binary kernel image (./linux) - for backward'
111 echo ' compatibility only, this creates a hard link to the'
112 echo ' real kernel binary, the "vmlinux" binary you'
113 echo ' find in the kernel root.'
114endef
115
116KBUILD_KCONFIG := $(HOST_DIR)/um/Kconfig
117
118archheaders:
119 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
120 kbuild-file=$(HOST_DIR)/include/asm/Kbuild \
121 obj=$(HOST_DIR)/include/generated/asm
122 $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.asm-generic \
123 kbuild-file=$(HOST_DIR)/include/uapi/asm/Kbuild \
124 obj=$(HOST_DIR)/include/generated/uapi/asm
125 $(Q)$(MAKE) KBUILD_SRC= ARCH=$(HEADER_ARCH) archheaders
126
127
128archprepare: include/generated/user_constants.h
129
130LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
131LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib $(call cc-option, -no-pie)
132
133CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
134 $(call cc-option, -fno-stack-protector,) \
135 $(call cc-option, -fno-stack-protector-all,)
136
137# Options used by linker script
138export LDS_START := $(START)
139export LDS_ELF_ARCH := $(ELF_ARCH)
140export LDS_ELF_FORMAT := $(ELF_FORMAT)
141
142# The wrappers will select whether using "malloc" or the kernel allocator.
143LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
144
145LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt))
146
147# Used by link-vmlinux.sh which has special support for um link
148export CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
149
150# When cleaning we don't include .config, so we don't include
151# TT or skas makefiles and don't clean skas_ptregs.h.
152CLEAN_FILES += linux x.i gmon.out
153
154archclean:
155 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
156 -o -name '*.gcov' \) -type f -print | xargs rm -f
157
158# Generated files
159
160$(HOST_DIR)/um/user-offsets.s: __headers FORCE
161 $(Q)$(MAKE) $(build)=$(HOST_DIR)/um $@
162
163define filechk_gen-asm-offsets
164 (set -e; \
165 echo "/*"; \
166 echo " * DO NOT MODIFY."; \
167 echo " *"; \
168 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
169 echo " *"; \
170 echo " */"; \
171 echo ""; \
172 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
173 echo ""; )
174endef
175
176include/generated/user_constants.h: $(HOST_DIR)/um/user-offsets.s
177 $(call filechk,gen-asm-offsets)
178
179export 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
23include $(srctree)/$(ARCH_DIR)/Makefile-skas
24
25SHARED_HEADERS := $(ARCH_DIR)/include/shared
26ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS)
27ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH)/shared
28ifneq ($(KBUILD_SRC),)
29ARCH_INCLUDE += -I$(SHARED_HEADERS)
30endif
31KBUILD_CPPFLAGS += -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH)
32
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.
35#
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.
40
41KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
42 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
43 -Din6addr_loopback=kernel_in6addr_loopback \
44 -Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
45
46KBUILD_AFLAGS += $(ARCH_INCLUDE)
47
48USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
49 $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
50 $(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64
51
52include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
53
54#This will adjust *FLAGS accordingly to the platform.
55include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
56
57KBUILD_CPPFLAGS += -I$(srctree)/arch/$(HEADER_ARCH)/include
58
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
61# in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different
62# errnos.
63# These apply to kernelspace only.
64#
65# strip leading and trailing whitespace to make the USER_CFLAGS removal of these
66# defines more robust
67
68KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
69 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
70KBUILD_CFLAGS += $(KERNEL_DEFINES)
71
72PHONY += linux
73
74all: linux
75
76linux: vmlinux
77 @echo ' LINK $@'
78 $(Q)ln -f $< $@
79
80define archhelp
81 echo '* linux - Binary kernel image (./linux) - for backward'
82 echo ' compatibility only, this creates a hard link to the'
83 echo ' real kernel binary, the "vmlinux" binary you'
84 echo ' find in the kernel root.'
85endef
86
87KBUILD_KCONFIG := arch/um/Kconfig.$(HEADER_ARCH)
88
89archprepare: $(SHARED_HEADERS)/user_constants.h
90archprepare: $(SHARED_HEADERS)/kern_constants.h
91
92LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
93LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
94
95CFLAGS_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
99# Options used by linker script
100export LDS_START := $(START)
101export LDS_ELF_ARCH := $(ELF_ARCH)
102export LDS_ELF_FORMAT := $(ELF_FORMAT)
103
104# The wrappers will select whether using "malloc" or the kernel allocator.
105LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
106
107LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt))
108
109CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
110define cmd_vmlinux__
111 $(CC) $(CFLAGS_vmlinux) -o $@ \
112 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
113 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
114 -lutil \
115 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o \
116 FORCE ,$^) ; rm -f linux
117endef
118
119# When cleaning we don't include .config, so we don't include
120# TT or skas makefiles and don't clean skas_ptregs.h.
121CLEAN_FILES += linux x.i gmon.out \
122 $(SHARED_HEADERS)/user_constants.h \
123 $(SHARED_HEADERS)/kern_constants.h
124
125archclean:
126 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
127 -o -name '*.gcov' \) -type f -print | xargs rm -f
128
129# Generated files
130
131$(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s: FORCE
132 $(Q)$(MAKE) $(build)=$(ARCH_DIR)/sys-$(SUBARCH) $@
133
134define filechk_gen-asm-offsets
135 (set -e; \
136 echo "/*"; \
137 echo " * DO NOT MODIFY."; \
138 echo " *"; \
139 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
140 echo " *"; \
141 echo " */"; \
142 echo ""; \
143 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
144 echo ""; )
145endef
146
147$(SHARED_HEADERS)/user_constants.h: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s
148 $(call filechk,gen-asm-offsets)
149
150$(SHARED_HEADERS)/kern_constants.h:
151 $(Q)mkdir -p $(dir $@)
152 $(Q)echo '#include "../../../../include/generated/asm-offsets.h"' >$@
153
154export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS HEADER_ARCH DEV_NULL_PATH