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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 := $(SUBARCH)_defconfig
18endif
19
20ARCH_DIR := arch/um
21# We require bash because the vmlinux link and loader script cpp use bash
22# features.
23SHELL := /bin/bash
24
25MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/shared/skas
26
27HEADER_ARCH := $(SUBARCH)
28
29ifneq ($(filter $(SUBARCH),x86 x86_64 i386),)
30 HEADER_ARCH := x86
31endif
32
33ifdef CONFIG_64BIT
34 KBUILD_CFLAGS += -mcmodel=large
35endif
36
37HOST_DIR := arch/$(HEADER_ARCH)
38
39include $(srctree)/$(ARCH_DIR)/Makefile-skas
40include $(srctree)/$(HOST_DIR)/Makefile.um
41
42core-y += $(HOST_DIR)/um/
43
44SHARED_HEADERS := $(ARCH_DIR)/include/shared
45ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS)
46ARCH_INCLUDE += -I$(srctree)/$(HOST_DIR)/um/shared
47KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/um
48
49# -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
50# named - it's a common symbol in libpcap, so we get a binary which crashes.
51#
52# Same things for in6addr_loopback and mktime - found in libc. For these two we
53# only get link-time error, luckily.
54#
55# -Dlongjmp=kernel_longjmp prevents anything from referencing the libpthread.a
56# embedded copy of longjmp, same thing for setjmp.
57#
58# These apply to USER_CFLAGS to.
59
60KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ \
61 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
62 -Dlongjmp=kernel_longjmp -Dsetjmp=kernel_setjmp \
63 -Din6addr_loopback=kernel_in6addr_loopback \
64 -Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
65
66KBUILD_RUSTFLAGS += -Crelocation-model=pie
67
68KBUILD_AFLAGS += $(ARCH_INCLUDE)
69
70USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \
71 $(ARCH_INCLUDE) $(MODE_INCLUDE) $(filter -I%,$(CFLAGS)) \
72 -D_FILE_OFFSET_BITS=64 -idirafter $(srctree)/include \
73 -idirafter $(objtree)/include -D__KERNEL__ -D__UM_HOST__
74
75#This will adjust *FLAGS accordingly to the platform.
76include $(srctree)/$(ARCH_DIR)/Makefile-os-Linux
77
78KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \
79 -I$(srctree)/$(HOST_DIR)/include/uapi \
80 -I$(objtree)/$(HOST_DIR)/include/generated \
81 -I$(objtree)/$(HOST_DIR)/include/generated/uapi
82
83# -Derrno=kernel_errno - This turns all kernel references to errno into
84# kernel_errno to separate them from the libc errno. This allows -fno-common
85# in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different
86# errnos.
87# These apply to kernelspace only.
88#
89# strip leading and trailing whitespace to make the USER_CFLAGS removal of these
90# defines more robust
91
92KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
93 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
94KBUILD_CFLAGS += $(KERNEL_DEFINES)
95
96PHONY += linux
97
98all: linux
99
100linux: vmlinux
101 @echo ' LINK $@'
102 $(Q)ln -f $< $@
103
104define archhelp
105 echo '* linux - Binary kernel image (./linux) - for backward'
106 echo ' compatibility only, this creates a hard link to the'
107 echo ' real kernel binary, the "vmlinux" binary you'
108 echo ' find in the kernel root.'
109endef
110
111archheaders:
112 $(Q)$(MAKE) -f $(srctree)/Makefile ARCH=$(HEADER_ARCH) asm-generic archheaders
113
114archprepare:
115 $(Q)$(MAKE) $(build)=$(HOST_DIR)/um include/generated/user_constants.h
116
117LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
118ifdef CONFIG_LD_SCRIPT_DYN
119LINK-$(call gcc-min-version, 60100)$(CONFIG_CC_IS_CLANG) += -no-pie
120endif
121LINK-$(CONFIG_LD_SCRIPT_DYN_RPATH) += -Wl,-rpath,/lib
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 := $(ELF_FORMAT)
130
131# The wrappers will select whether using "malloc" or the kernel allocator.
132LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
133
134# Avoid binutils 2.39+ warnings by marking the stack non-executable and
135# ignorning warnings for the kallsyms sections.
136LDFLAGS_EXECSTACK = -z noexecstack
137ifeq ($(CONFIG_LD_IS_BFD),y)
138LDFLAGS_EXECSTACK += $(call ld-option,--no-warn-rwx-segments)
139endif
140
141LD_FLAGS_CMDLINE = $(foreach opt,$(KBUILD_LDFLAGS) $(LDFLAGS_EXECSTACK),-Wl,$(opt))
142
143# Used by link-vmlinux.sh which has special support for um link
144export CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE) $(CC_FLAGS_LTO)
145
146# When cleaning we don't include .config, so we don't include
147# TT or skas makefiles and don't clean skas_ptregs.h.
148CLEAN_FILES += linux x.i gmon.out
149MRPROPER_FILES += $(HOST_DIR)/include/generated
150
151archclean:
152 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
153 -o -name '*.gcov' \) -type f -print | xargs rm -f
154
155export HEADER_ARCH SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING 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
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# These apply to USER_CFLAGS to.
63
64KBUILD_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
69KBUILD_AFLAGS += $(ARCH_INCLUDE)
70
71USER_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.
77include $(ARCH_DIR)/Makefile-os-$(OS)
78
79KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \
80 -I$(srctree)/$(HOST_DIR)/include/uapi \
81 -I$(objtree)/$(HOST_DIR)/include/generated \
82 -I$(objtree)/$(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
93KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
94 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
95KBUILD_CFLAGS += $(KERNEL_DEFINES)
96
97PHONY += linux
98
99all: linux
100
101linux: vmlinux
102 @echo ' LINK $@'
103 $(Q)ln -f $< $@
104
105define 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.'
110endef
111
112KBUILD_KCONFIG := $(HOST_DIR)/um/Kconfig
113
114archheaders:
115 $(Q)$(MAKE) KBUILD_SRC= ARCH=$(HEADER_ARCH) archheaders
116
117archprepare: include/generated/user_constants.h
118
119LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
120LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
121
122CFLAGS_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
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 = $(foreach opt,$(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
142
143archclean:
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 $@
151
152define filechk_gen-asm-offsets
153 (set -e; \
154 echo "/*"; \
155 echo " * DO NOT MODIFY."; \
156 echo " *"; \
157 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
158 echo " *"; \
159 echo " */"; \
160 echo ""; \
161 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
162 echo ""; )
163endef
164
165include/generated/user_constants.h: $(HOST_DIR)/um/user-offsets.s
166 $(call filechk,gen-asm-offsets)
167
168export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH