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Paul Smith4f193362006-03-05 17:14:10 -05001#
2# This file is included by the global makefile so that you can add your own
3# architecture-specific flags and dependencies.
4#
Jeff Dike4c9e1382007-10-16 01:26:54 -07005# Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006# Licensed under the GPL
7#
8
Ramkumar Ramachandrae40f04d2013-09-27 09:44:46 +05309# 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070020ARCH_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
Al Viro8569c912008-08-17 13:48:37 -040032MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/shared/skas
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
Al Viro7bbe7202011-08-18 20:06:29 +010034HEADER_ARCH := $(SUBARCH)
35
Richard Weinbergerfff65402013-11-29 15:39:41 +010036ifneq ($(filter $(SUBARCH),x86 x86_64 i386),)
37 HEADER_ARCH := x86
Al Viro7bbe7202011-08-18 20:06:29 +010038endif
Richard Weinbergerfff65402013-11-29 15:39:41 +010039
40ifdef CONFIG_64BIT
Richard Weinberger12783aa2012-01-24 20:09:12 +010041 KBUILD_CFLAGS += -mcmodel=large
Al Viro7bbe7202011-08-18 20:06:29 +010042endif
43
Al Viro5c48b102011-08-18 20:06:39 +010044HOST_DIR := arch/$(HEADER_ARCH)
45
Masahiro Yamadaa436bb72015-03-27 20:43:36 +090046include $(ARCH_DIR)/Makefile-skas
47include $(HOST_DIR)/Makefile.um
Al Viro5c48b102011-08-18 20:06:39 +010048
49core-y += $(HOST_DIR)/um/
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Al Viro22409f92009-01-05 17:18:42 +000051SHARED_HEADERS := $(ARCH_DIR)/include/shared
52ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS)
Al Viro5c48b102011-08-18 20:06:39 +010053ARCH_INCLUDE += -I$(srctree)/$(HOST_DIR)/um/shared
54KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/um
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
Paolo 'Blaisorblade' Giarrusso98105d42006-02-01 03:06:25 -080056# -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.
Paolo 'Blaisorblade' Giarrussofd748102005-09-21 18:39:32 +020058#
Paolo 'Blaisorblade' Giarrusso98105d42006-02-01 03:06:25 -080059# Same things for in6addr_loopback and mktime - found in libc. For these two we
60# only get link-time error, luckily.
61#
Florian Fainellif44f1e72017-05-23 17:32:31 -070062# -Dlongjmp=kernel_longjmp prevents anything from referencing the libpthread.a
63# embedded copy of longjmp, same thing for setjmp.
64#
Paolo 'Blaisorblade' Giarrusso98105d42006-02-01 03:06:25 -080065# These apply to USER_CFLAGS to.
Paolo 'Blaisorblade' Giarrussoecc354a2005-07-14 00:33:41 -070066
Al Virodc5be202012-02-11 05:39:56 -050067KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ \
Paolo 'Blaisorblade' Giarrusso98105d42006-02-01 03:06:25 -080068 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
Florian Fainellif44f1e72017-05-23 17:32:31 -070069 -Dlongjmp=kernel_longjmp -Dsetjmp=kernel_setjmp \
Jeff Dike818f6ef2007-10-16 01:26:45 -070070 -Din6addr_loopback=kernel_in6addr_loopback \
Al Viro2c51a4b2011-09-14 16:21:38 -070071 -Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
Paolo 'Blaisorblade' Giarrussofd748102005-09-21 18:39:32 +020072
Sam Ravnborg222d3942007-10-15 21:59:31 +020073KBUILD_AFLAGS += $(ARCH_INCLUDE)
Paolo 'Blaisorblade' Giarrussoecc354a2005-07-14 00:33:41 -070074
Richard Weinberger298e20b2015-05-31 19:50:57 +020075USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -I%,,$(KBUILD_CFLAGS))) \
76 $(ARCH_INCLUDE) $(MODE_INCLUDE) $(filter -I%,$(CFLAGS)) \
Richard Weinberger0b5aedf2015-06-28 22:55:26 +020077 -D_FILE_OFFSET_BITS=64 -idirafter $(srctree)/include \
78 -idirafter $(obj)/include -D__KERNEL__ -D__UM_HOST__
akpm@osdl.orgd45e44d2006-10-29 22:46:42 -080079
akpm@osdl.orgd45e44d2006-10-29 22:46:42 -080080#This will adjust *FLAGS accordingly to the platform.
Masahiro Yamadaa436bb72015-03-27 20:43:36 +090081include $(ARCH_DIR)/Makefile-os-$(OS)
Paolo 'Blaisorblade' Giarrussoecc354a2005-07-14 00:33:41 -070082
H. Peter Anvinc9b284b2011-12-05 16:03:30 -080083KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \
David Howellsabbf1592012-10-02 18:01:26 +010084 -I$(srctree)/$(HOST_DIR)/include/uapi \
Arnd Bergmann58ab5e02016-06-15 17:45:46 +020085 -I$(objtree)/$(HOST_DIR)/include/generated \
86 -I$(objtree)/$(HOST_DIR)/include/generated/uapi
Al Viro1de15022008-08-17 22:54:55 -040087
Linus Torvalds1da177e2005-04-16 15:20:36 -070088# -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
Sam Ravnborga0f97e02007-10-14 22:21:35 +020090# in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different
Linus Torvalds1da177e2005-04-16 15:20:36 -070091# errnos.
Paolo 'Blaisorblade' Giarrusso98105d42006-02-01 03:06:25 -080092# These apply to kernelspace only.
Jeff Dikef15cf512007-11-05 14:50:59 -080093#
94# strip leading and trailing whitespace to make the USER_CFLAGS removal of these
95# defines more robust
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
Jeff Dikef15cf512007-11-05 14:50:59 -080097KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
98 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
Sam Ravnborga0f97e02007-10-14 22:21:35 +020099KBUILD_CFLAGS += $(KERNEL_DEFINES)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
Paul Smith4f193362006-03-05 17:14:10 -0500101PHONY += linux
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
103all: linux
104
105linux: vmlinux
Jeff Dikea4b741e2006-05-01 12:16:06 -0700106 @echo ' LINK $@'
Paolo 'Blaisorblade' Giarrussocb8aa3d2006-05-01 12:16:03 -0700107 $(Q)ln -f $< $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
109define archhelp
110 echo '* linux - Binary kernel image (./linux) - for backward'
111 echo ' compatibility only, this creates a hard link to the'
Matt LaPlante4b3f6862006-10-03 22:21:02 +0200112 echo ' real kernel binary, the "vmlinux" binary you'
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 echo ' find in the kernel root.'
114endef
115
Al Viro5c48b102011-08-18 20:06:39 +0100116KBUILD_KCONFIG := $(HOST_DIR)/um/Kconfig
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
H. Peter Anvinc9b284b2011-12-05 16:03:30 -0800118archheaders:
Al Viro699d7a52017-09-04 02:37:17 -0400119 $(Q)$(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
Michal Marekd4bc5902014-06-05 17:44:44 +0200125 $(Q)$(MAKE) KBUILD_SRC= ARCH=$(HEADER_ARCH) archheaders
H. Peter Anvinc9b284b2011-12-05 16:03:30 -0800126
Al Viro699d7a52017-09-04 02:37:17 -0400127
Al Viro4de1c5f2011-08-18 20:01:19 +0100128archprepare: include/generated/user_constants.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
130LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
Thomas Meyer883354a2017-08-20 13:26:04 +0200131LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib $(call cc-option, -no-pie)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132
Paolo 'Blaisorblade' Giarrusso275e6e12006-05-01 12:16:04 -0700133CFLAGS_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
Sam Ravnborg51b563f2009-09-20 12:28:22 +0200137# Options used by linker script
138export LDS_START := $(START)
139export LDS_ELF_ARCH := $(ELF_ARCH)
140export LDS_ELF_FORMAT := $(ELF_FORMAT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
Jeff Dike4c9e1382007-10-16 01:26:54 -0700142# The wrappers will select whether using "malloc" or the kernel allocator.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
144
Lorenzo Colittifb1770a2015-11-18 23:12:09 +0900145LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt))
Jeff Dike0ba7fe02008-02-04 22:30:45 -0800146
Sam Ravnborg1f2bfbd2012-05-05 10:18:41 +0200147# Used by link-vmlinux.sh which has special support for um link
148export CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149
Jeff Dike4c9e1382007-10-16 01:26:54 -0700150# When cleaning we don't include .config, so we don't include
151# TT or skas makefiles and don't clean skas_ptregs.h.
Al Viro9e636452011-08-18 20:01:49 +0100152CLEAN_FILES += linux x.i gmon.out
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154archclean:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
156 -o -name '*.gcov' \) -type f -print | xargs rm -f
157
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158# Generated files
Jeff Dike4ee189a2006-01-11 12:17:23 -0800159
H. Peter Anvin392f4b72011-12-05 16:06:02 -0800160$(HOST_DIR)/um/user-offsets.s: __headers FORCE
Al Viro5c48b102011-08-18 20:06:39 +0100161 $(Q)$(MAKE) $(build)=$(HOST_DIR)/um $@
Jeff Dike4ee189a2006-01-11 12:17:23 -0800162
Sam Ravnborgf64a2272005-09-09 23:10:54 +0200163define filechk_gen-asm-offsets
164 (set -e; \
Sam Ravnborgf64a2272005-09-09 23:10:54 +0200165 echo "/*"; \
166 echo " * DO NOT MODIFY."; \
167 echo " *"; \
168 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
169 echo " *"; \
170 echo " */"; \
171 echo ""; \
172 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
Al Viroecba97d2005-09-28 22:27:23 +0100173 echo ""; )
Sam Ravnborgf64a2272005-09-09 23:10:54 +0200174endef
175
Al Viro5c48b102011-08-18 20:06:39 +0100176include/generated/user_constants.h: $(HOST_DIR)/um/user-offsets.s
Al Viro8d0b9dc2005-05-05 16:15:23 -0700177 $(call filechk,gen-asm-offsets)
178
Al Viro5c48b102011-08-18 20:06:39 +0100179export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH