2 # This file is included by the global makefile so that you can add your own
3 # architecture-specific flags and dependencies.
5 # Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
6 # Licensed under the GPL
9 # select defconfig based on actual architecture
11 ifeq ($(shell uname
-m
),x86_64
)
12 KBUILD_DEFCONFIG
:= x86_64_defconfig
14 KBUILD_DEFCONFIG
:= i386_defconfig
17 KBUILD_DEFCONFIG
:= $(SUBARCH
)_defconfig
21 OS
:= $(shell uname
-s
)
22 # We require bash because the vmlinux link and loader script cpp use bash
26 filechk_gen_header
= $<
28 core-y
+= $(ARCH_DIR
)/kernel
/ \
29 $(ARCH_DIR
)/drivers
/ \
32 MODE_INCLUDE
+= -I
$(srctree
)/$(ARCH_DIR
)/include/shared
/skas
34 HEADER_ARCH
:= $(SUBARCH
)
36 # Additional ARCH settings for x86
37 ifeq ($(SUBARCH
),i386
)
40 ifeq ($(SUBARCH
),x86_64
)
42 KBUILD_CFLAGS
+= -mcmodel
=large
45 HOST_DIR
:= arch
/$(HEADER_ARCH
)
47 include $(srctree
)/$(ARCH_DIR
)/Makefile-skas
48 include $(srctree
)/$(HOST_DIR
)/Makefile.um
50 core-y
+= $(HOST_DIR
)/um
/
52 SHARED_HEADERS
:= $(ARCH_DIR
)/include/shared
53 ARCH_INCLUDE
:= -I
$(srctree
)/$(SHARED_HEADERS
)
54 ARCH_INCLUDE
+= -I
$(srctree
)/$(HOST_DIR
)/um
/shared
55 KBUILD_CPPFLAGS
+= -I
$(srctree
)/$(HOST_DIR
)/um
57 # -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
58 # named - it's a common symbol in libpcap, so we get a binary which crashes.
60 # Same things for in6addr_loopback and mktime - found in libc. For these two we
61 # only get link-time error, luckily.
63 # These apply to USER_CFLAGS to.
65 KBUILD_CFLAGS
+= $(CFLAGS
) $(CFLAGS-y
) -D__arch_um__ \
66 $(ARCH_INCLUDE
) $(MODE_INCLUDE
) -Dvmap
=kernel_vmap \
67 -Din6addr_loopback
=kernel_in6addr_loopback \
68 -Din6addr_any
=kernel_in6addr_any
-Dstrrchr
=kernel_strrchr
70 KBUILD_AFLAGS
+= $(ARCH_INCLUDE
)
72 USER_CFLAGS
= $(patsubst $(KERNEL_DEFINES
),,$(patsubst -D__KERNEL__
,,\
73 $(patsubst -I
%,,$(KBUILD_CFLAGS
)))) $(ARCH_INCLUDE
) $(MODE_INCLUDE
) \
74 $(filter -I
%,$(CFLAGS
)) -D_FILE_OFFSET_BITS
=64 -idirafter
include
76 #This will adjust *FLAGS accordingly to the platform.
77 include $(srctree
)/$(ARCH_DIR
)/Makefile-os-
$(OS
)
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
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
88 # These apply to kernelspace only.
90 # strip leading and trailing whitespace to make the USER_CFLAGS removal of these
93 KERNEL_DEFINES
= $(strip -Derrno
=kernel_errno
-Dsigprocmask
=kernel_sigprocmask \
94 -Dmktime
=kernel_mktime
$(ARCH_KERNEL_DEFINES
))
95 KBUILD_CFLAGS
+= $(KERNEL_DEFINES
)
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.'
112 KBUILD_KCONFIG
:= $(HOST_DIR
)/um
/Kconfig
115 $(Q
)$(MAKE
) -C
'$(srctree)' KBUILD_SRC
= \
116 ARCH
=$(HEADER_ARCH
) O
='$(objtree)' archheaders
118 archprepare
: include/generated
/user_constants.h
120 LINK-
$(CONFIG_LD_SCRIPT_STATIC
) += -static
121 LINK-
$(CONFIG_LD_SCRIPT_DYN
) += -Wl
,-rpath
,/lib
123 CFLAGS_NO_HARDENING
:= $(call cc-option
, -fno-PIC
,) $(call cc-option
, -fno-pic
,) \
124 $(call cc-option
, -fno-stack-protector
,) \
125 $(call cc-option
, -fno-stack-protector-all
,)
127 # Options used by linker script
128 export LDS_START
:= $(START
)
129 export LDS_ELF_ARCH
:= $(ELF_ARCH
)
130 export LDS_ELF_FORMAT
:= $(ELF_FORMAT
)
132 # The wrappers will select whether using "malloc" or the kernel allocator.
133 LINK_WRAPS
= -Wl
,--wrap
,malloc
-Wl
,--wrap
,free
-Wl
,--wrap
,calloc
135 LD_FLAGS_CMDLINE
= $(foreach opt
,$(LDFLAGS
),-Wl
,$(opt
))
137 # Used by link-vmlinux.sh which has special support for um link
138 export CFLAGS_vmlinux
:= $(LINK-y
) $(LINK_WRAPS
) $(LD_FLAGS_CMDLINE
)
140 # When cleaning we don't include .config, so we don't include
141 # TT or skas makefiles and don't clean skas_ptregs.h.
142 CLEAN_FILES
+= linux x.i gmon.out
145 @find . \
( -name
'*.bb' -o
-name
'*.bbg' -o
-name
'*.da' \
146 -o
-name
'*.gcov' \
) -type f
-print | xargs
rm -f
150 $(HOST_DIR
)/um
/user-offsets.s
: __headers FORCE
151 $(Q
)$(MAKE
) $(build
)=$(HOST_DIR
)/um
$@
153 define filechk_gen-asm-offsets
156 echo
" * DO NOT MODIFY."; \
158 echo
" * This file was generated by arch/$(ARCH)/Makefile"; \
162 sed
-ne
"/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
166 include/generated
/user_constants.h
: $(HOST_DIR
)/um
/user-offsets.s
167 $(call filechk
,gen-asm-offsets
)
169 export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH