blob: 00210e9bf202e53eb4ceca0f527f8b4e03a80c97 [file] [log] [blame]
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
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
Al Viro8569c912008-08-17 13:48:37 -040021MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/shared/skas
Linus Torvalds1da177e2005-04-16 15:20:36 -070022
Al Viro7bbe7202011-08-18 20:06:29 +010023HEADER_ARCH := $(SUBARCH)
24
25# Additional ARCH settings for x86
26ifeq ($(SUBARCH),i386)
27 HEADER_ARCH := x86
28endif
29ifeq ($(SUBARCH),x86_64)
30 HEADER_ARCH := x86
31endif
32
Al Viro5c48b102011-08-18 20:06:39 +010033HOST_DIR := arch/$(HEADER_ARCH)
34
Jeff Dike42fda662007-10-16 01:26:50 -070035include $(srctree)/$(ARCH_DIR)/Makefile-skas
Al Viro5c48b102011-08-18 20:06:39 +010036include $(srctree)/$(HOST_DIR)/Makefile.um
37
38core-y += $(HOST_DIR)/um/
Linus Torvalds1da177e2005-04-16 15:20:36 -070039
Al Viro22409f92009-01-05 17:18:42 +000040SHARED_HEADERS := $(ARCH_DIR)/include/shared
41ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS)
Al Viro5c48b102011-08-18 20:06:39 +010042ARCH_INCLUDE += -I$(srctree)/$(HOST_DIR)/um/shared
43KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/um
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
Paolo 'Blaisorblade' Giarrusso98105d42006-02-01 03:06:25 -080045# -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
46# named - it's a common symbol in libpcap, so we get a binary which crashes.
Paolo 'Blaisorblade' Giarrussofd748102005-09-21 18:39:32 +020047#
Paolo 'Blaisorblade' Giarrusso98105d42006-02-01 03:06:25 -080048# Same things for in6addr_loopback and mktime - found in libc. For these two we
49# only get link-time error, luckily.
50#
51# These apply to USER_CFLAGS to.
Paolo 'Blaisorblade' Giarrussoecc354a2005-07-14 00:33:41 -070052
Jeff Dike260c0cb2008-02-04 22:31:02 -080053KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
Paolo 'Blaisorblade' Giarrusso98105d42006-02-01 03:06:25 -080054 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
Jeff Dike818f6ef2007-10-16 01:26:45 -070055 -Din6addr_loopback=kernel_in6addr_loopback \
Al Viro2c51a4b2011-09-14 16:21:38 -070056 -Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
Paolo 'Blaisorblade' Giarrussofd748102005-09-21 18:39:32 +020057
Sam Ravnborg222d3942007-10-15 21:59:31 +020058KBUILD_AFLAGS += $(ARCH_INCLUDE)
Paolo 'Blaisorblade' Giarrussoecc354a2005-07-14 00:33:41 -070059
akpm@osdl.orgd45e44d2006-10-29 22:46:42 -080060USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
Sam Ravnborga0f97e02007-10-14 22:21:35 +020061 $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
Al Viro4d45db92011-08-18 20:00:59 +010062 $(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64 -idirafter include
akpm@osdl.orgd45e44d2006-10-29 22:46:42 -080063
akpm@osdl.orgd45e44d2006-10-29 22:46:42 -080064#This will adjust *FLAGS accordingly to the platform.
65include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
Paolo 'Blaisorblade' Giarrussoecc354a2005-07-14 00:33:41 -070066
H. Peter Anvinc9b284b2011-12-05 16:03:30 -080067KBUILD_CPPFLAGS += -I$(srctree)/$(HOST_DIR)/include \
68 -I$(HOST_DIR)/include/generated
Al Viro1de15022008-08-17 22:54:55 -040069
Linus Torvalds1da177e2005-04-16 15:20:36 -070070# -Derrno=kernel_errno - This turns all kernel references to errno into
71# kernel_errno to separate them from the libc errno. This allows -fno-common
Sam Ravnborga0f97e02007-10-14 22:21:35 +020072# in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different
Linus Torvalds1da177e2005-04-16 15:20:36 -070073# errnos.
Paolo 'Blaisorblade' Giarrusso98105d42006-02-01 03:06:25 -080074# These apply to kernelspace only.
Jeff Dikef15cf512007-11-05 14:50:59 -080075#
76# strip leading and trailing whitespace to make the USER_CFLAGS removal of these
77# defines more robust
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
Jeff Dikef15cf512007-11-05 14:50:59 -080079KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
80 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
Sam Ravnborga0f97e02007-10-14 22:21:35 +020081KBUILD_CFLAGS += $(KERNEL_DEFINES)
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
Paul Smith4f193362006-03-05 17:14:10 -050083PHONY += linux
Linus Torvalds1da177e2005-04-16 15:20:36 -070084
85all: linux
86
87linux: vmlinux
Jeff Dikea4b741e2006-05-01 12:16:06 -070088 @echo ' LINK $@'
Paolo 'Blaisorblade' Giarrussocb8aa3d2006-05-01 12:16:03 -070089 $(Q)ln -f $< $@
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
91define archhelp
92 echo '* linux - Binary kernel image (./linux) - for backward'
93 echo ' compatibility only, this creates a hard link to the'
Matt LaPlante4b3f6862006-10-03 22:21:02 +020094 echo ' real kernel binary, the "vmlinux" binary you'
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 echo ' find in the kernel root.'
96endef
97
Al Viro5c48b102011-08-18 20:06:39 +010098KBUILD_KCONFIG := $(HOST_DIR)/um/Kconfig
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
H. Peter Anvinc9b284b2011-12-05 16:03:30 -0800100archheaders:
101 $(Q)$(MAKE) -C '$(KBUILD_SRC)' KBUILD_SRC= \
102 ARCH=$(SUBARCH) O='$(objtree)' archheaders
103
Al Viro4de1c5f2011-08-18 20:01:19 +0100104archprepare: include/generated/user_constants.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105
106LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
107LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
108
Paolo 'Blaisorblade' Giarrusso275e6e12006-05-01 12:16:04 -0700109CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
110 $(call cc-option, -fno-stack-protector,) \
111 $(call cc-option, -fno-stack-protector-all,)
112
Sam Ravnborg51b563f2009-09-20 12:28:22 +0200113# Options used by linker script
114export LDS_START := $(START)
115export LDS_ELF_ARCH := $(ELF_ARCH)
116export LDS_ELF_FORMAT := $(ELF_FORMAT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
Jeff Dike4c9e1382007-10-16 01:26:54 -0700118# The wrappers will select whether using "malloc" or the kernel allocator.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
120
Jeff Dike260c0cb2008-02-04 22:31:02 -0800121LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt))
Jeff Dike0ba7fe02008-02-04 22:30:45 -0800122
123CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124define cmd_vmlinux__
125 $(CC) $(CFLAGS_vmlinux) -o $@ \
126 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
127 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
Paolo 'Blaisorblade' Giarrusso776cfeb2005-05-05 16:15:18 -0700128 -lutil \
Al Viro75473c12007-07-20 02:01:16 +0100129 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 FORCE ,$^) ; rm -f linux
131endef
132
Jeff Dike4c9e1382007-10-16 01:26:54 -0700133# When cleaning we don't include .config, so we don't include
134# TT or skas makefiles and don't clean skas_ptregs.h.
Al Viro9e636452011-08-18 20:01:49 +0100135CLEAN_FILES += linux x.i gmon.out
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137archclean:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
139 -o -name '*.gcov' \) -type f -print | xargs rm -f
140
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141# Generated files
Jeff Dike4ee189a2006-01-11 12:17:23 -0800142
Al Viro5c48b102011-08-18 20:06:39 +0100143$(HOST_DIR)/um/user-offsets.s: FORCE
144 $(Q)$(MAKE) $(build)=$(HOST_DIR)/um $@
Jeff Dike4ee189a2006-01-11 12:17:23 -0800145
Sam Ravnborgf64a2272005-09-09 23:10:54 +0200146define filechk_gen-asm-offsets
147 (set -e; \
Sam Ravnborgf64a2272005-09-09 23:10:54 +0200148 echo "/*"; \
149 echo " * DO NOT MODIFY."; \
150 echo " *"; \
151 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
152 echo " *"; \
153 echo " */"; \
154 echo ""; \
155 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
Al Viroecba97d2005-09-28 22:27:23 +0100156 echo ""; )
Sam Ravnborgf64a2272005-09-09 23:10:54 +0200157endef
158
Al Viro5c48b102011-08-18 20:06:39 +0100159include/generated/user_constants.h: $(HOST_DIR)/um/user-offsets.s
Al Viro8d0b9dc2005-05-05 16:15:23 -0700160 $(call filechk,gen-asm-offsets)
161
Al Viro5c48b102011-08-18 20:06:39 +0100162export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS DEV_NULL_PATH