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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
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
Jeff Dike42fda662007-10-16 01:26:50 -070023include $(srctree)/$(ARCH_DIR)/Makefile-skas
Linus Torvalds1da177e2005-04-16 15:20:36 -070024
Al Viroaa7bd942008-08-23 17:28:20 -040025ARCH_INCLUDE := -I$(srctree)/$(ARCH_DIR)/include/shared
26ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH)/shared
Al Virofd7aab92005-05-05 16:15:29 -070027ifneq ($(KBUILD_SRC),)
Al Viro87e299e2008-10-11 18:39:18 -040028ARCH_INCLUDE += -I$(ARCH_DIR)/include/shared # for two generated files
Al Virofd7aab92005-05-05 16:15:29 -070029endif
Al Viroaa7bd942008-08-23 17:28:20 -040030KBUILD_CPPFLAGS += -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -070031
Paolo 'Blaisorblade' Giarrusso98105d42006-02-01 03:06:25 -080032# -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
33# named - it's a common symbol in libpcap, so we get a binary which crashes.
Paolo 'Blaisorblade' Giarrussofd748102005-09-21 18:39:32 +020034#
Paolo 'Blaisorblade' Giarrusso98105d42006-02-01 03:06:25 -080035# Same things for in6addr_loopback and mktime - found in libc. For these two we
36# only get link-time error, luckily.
37#
38# These apply to USER_CFLAGS to.
Paolo 'Blaisorblade' Giarrussoecc354a2005-07-14 00:33:41 -070039
Jeff Dike260c0cb2008-02-04 22:31:02 -080040KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
Paolo 'Blaisorblade' Giarrusso98105d42006-02-01 03:06:25 -080041 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
Jeff Dike818f6ef2007-10-16 01:26:45 -070042 -Din6addr_loopback=kernel_in6addr_loopback \
43 -Din6addr_any=kernel_in6addr_any
Paolo 'Blaisorblade' Giarrussofd748102005-09-21 18:39:32 +020044
Sam Ravnborg222d3942007-10-15 21:59:31 +020045KBUILD_AFLAGS += $(ARCH_INCLUDE)
Paolo 'Blaisorblade' Giarrussoecc354a2005-07-14 00:33:41 -070046
akpm@osdl.orgd45e44d2006-10-29 22:46:42 -080047USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
Sam Ravnborga0f97e02007-10-14 22:21:35 +020048 $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
Jeff Dike260c0cb2008-02-04 22:31:02 -080049 $(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64
akpm@osdl.orgd45e44d2006-10-29 22:46:42 -080050
51include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
52
53#This will adjust *FLAGS accordingly to the platform.
54include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
Paolo 'Blaisorblade' Giarrussoecc354a2005-07-14 00:33:41 -070055
Al Viro1de15022008-08-17 22:54:55 -040056KBUILD_CPPFLAGS += -I$(srctree)/arch/$(HEADER_ARCH)/include
57
Linus Torvalds1da177e2005-04-16 15:20:36 -070058# -Derrno=kernel_errno - This turns all kernel references to errno into
59# kernel_errno to separate them from the libc errno. This allows -fno-common
Sam Ravnborga0f97e02007-10-14 22:21:35 +020060# in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different
Linus Torvalds1da177e2005-04-16 15:20:36 -070061# errnos.
Paolo 'Blaisorblade' Giarrusso98105d42006-02-01 03:06:25 -080062# These apply to kernelspace only.
Jeff Dikef15cf512007-11-05 14:50:59 -080063#
64# strip leading and trailing whitespace to make the USER_CFLAGS removal of these
65# defines more robust
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
Jeff Dikef15cf512007-11-05 14:50:59 -080067KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
68 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
Sam Ravnborga0f97e02007-10-14 22:21:35 +020069KBUILD_CFLAGS += $(KERNEL_DEFINES)
Linus Torvalds1da177e2005-04-16 15:20:36 -070070
Paul Smith4f193362006-03-05 17:14:10 -050071PHONY += linux
Linus Torvalds1da177e2005-04-16 15:20:36 -070072
73all: linux
74
75linux: vmlinux
Jeff Dikea4b741e2006-05-01 12:16:06 -070076 @echo ' LINK $@'
Paolo 'Blaisorblade' Giarrussocb8aa3d2006-05-01 12:16:03 -070077 $(Q)ln -f $< $@
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79define archhelp
80 echo '* linux - Binary kernel image (./linux) - for backward'
81 echo ' compatibility only, this creates a hard link to the'
Matt LaPlante4b3f6862006-10-03 22:21:02 +020082 echo ' real kernel binary, the "vmlinux" binary you'
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 echo ' find in the kernel root.'
84endef
85
Al Viro61bee202008-08-25 04:51:27 -040086KBUILD_KCONFIG := arch/um/Kconfig.$(HEADER_ARCH)
Linus Torvalds1da177e2005-04-16 15:20:36 -070087
Al Viro87e299e2008-10-11 18:39:18 -040088archprepare: $(ARCH_DIR)/include/shared/user_constants.h
Al Viro8569c912008-08-17 13:48:37 -040089prepare: $(ARCH_DIR)/include/shared/kern_constants.h
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
91LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
92LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
93
Paolo 'Blaisorblade' Giarrusso275e6e12006-05-01 12:16:04 -070094CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
95 $(call cc-option, -fno-stack-protector,) \
96 $(call cc-option, -fno-stack-protector-all,)
97
Linus Torvalds1da177e2005-04-16 15:20:36 -070098CONFIG_KERNEL_STACK_ORDER ?= 2
99STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] )
100
Jeff Dike42fda662007-10-16 01:26:50 -0700101CPPFLAGS_vmlinux.lds = -U$(SUBARCH) -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \
102 -DELF_FORMAT="$(ELF_FORMAT)" -DKERNEL_STACK_SIZE=$(STACK_SIZE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
Jeff Dike4c9e1382007-10-16 01:26:54 -0700104# The wrappers will select whether using "malloc" or the kernel allocator.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
106
Jeff Dike260c0cb2008-02-04 22:31:02 -0800107LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt))
Jeff Dike0ba7fe02008-02-04 22:30:45 -0800108
109CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700110define cmd_vmlinux__
111 $(CC) $(CFLAGS_vmlinux) -o $@ \
112 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
113 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
Paolo 'Blaisorblade' Giarrusso776cfeb2005-05-05 16:15:18 -0700114 -lutil \
Al Viro75473c12007-07-20 02:01:16 +0100115 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116 FORCE ,$^) ; rm -f linux
117endef
118
Jeff Dike4c9e1382007-10-16 01:26:54 -0700119# When cleaning we don't include .config, so we don't include
120# TT or skas makefiles and don't clean skas_ptregs.h.
Al Viro87e299e2008-10-11 18:39:18 -0400121CLEAN_FILES += linux x.i gmon.out \
Al Viro8569c912008-08-17 13:48:37 -0400122 $(ARCH_DIR)/include/shared/user_constants.h \
Al Viro61bee202008-08-25 04:51:27 -0400123 $(ARCH_DIR)/include/shared/kern_constants.h
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125archclean:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
127 -o -name '*.gcov' \) -type f -print | xargs rm -f
128
Al Viro8569c912008-08-17 13:48:37 -0400129$(objtree)/$(ARCH_DIR)/include/shared:
Jeff Dikec6b7a1e2006-02-01 03:06:22 -0800130 @echo ' MKDIR $@'
131 $(Q)mkdir -p $@
132
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133# Generated files
Jeff Dike4ee189a2006-01-11 12:17:23 -0800134
Paolo 'Blaisorblade' Giarrussocb8aa3d2006-05-01 12:16:03 -0700135$(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s: FORCE
136 $(Q)$(MAKE) $(build)=$(ARCH_DIR)/sys-$(SUBARCH) $@
Jeff Dike4ee189a2006-01-11 12:17:23 -0800137
Sam Ravnborgf64a2272005-09-09 23:10:54 +0200138define filechk_gen-asm-offsets
139 (set -e; \
Sam Ravnborgf64a2272005-09-09 23:10:54 +0200140 echo "/*"; \
141 echo " * DO NOT MODIFY."; \
142 echo " *"; \
143 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
144 echo " *"; \
145 echo " */"; \
146 echo ""; \
147 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
Al Viroecba97d2005-09-28 22:27:23 +0100148 echo ""; )
Sam Ravnborgf64a2272005-09-09 23:10:54 +0200149endef
150
Al Viro8569c912008-08-17 13:48:37 -0400151$(ARCH_DIR)/include/shared/user_constants.h: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s
Al Viro8d0b9dc2005-05-05 16:15:23 -0700152 $(call filechk,gen-asm-offsets)
153
Al Viro8569c912008-08-17 13:48:37 -0400154$(ARCH_DIR)/include/shared/kern_constants.h: $(objtree)/$(ARCH_DIR)/include/shared
Jeff Dike4ee189a2006-01-11 12:17:23 -0800155 @echo ' SYMLINK $@'
Al Viro8ede0bd2008-08-17 19:13:17 -0400156 $(Q)ln -sf ../../../../include/asm/asm-offsets.h $@
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157
Al Viroec82c322008-08-25 04:14:29 -0400158export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS HEADER_ARCH DEV_NULL_PATH