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
10 OS := $(shell uname -s)
11 # We require bash because the vmlinux link and loader script cpp use bash
15 filechk_gen_header = $<
17 core-y += $(ARCH_DIR)/kernel/ \
18 $(ARCH_DIR)/drivers/ \
21 MODE_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include/shared/skas
23 include $(srctree)/$(ARCH_DIR)/Makefile-skas
25 ARCH_INCLUDE := -I$(srctree)/$(ARCH_DIR)/include/shared
26 ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH)/shared
27 ifneq ($(KBUILD_SRC),)
28 ARCH_INCLUDE += -I$(ARCH_DIR)/include/shared # for two generated files
30 KBUILD_CPPFLAGS += -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH)
32 # -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.
35 # Same things for in6addr_loopback and mktime - found in libc. For these two we
36 # only get link-time error, luckily.
38 # These apply to USER_CFLAGS to.
40 KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
41 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
42 -Din6addr_loopback=kernel_in6addr_loopback \
43 -Din6addr_any=kernel_in6addr_any
45 KBUILD_AFLAGS += $(ARCH_INCLUDE)
47 USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
48 $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
49 $(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64
51 include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
53 #This will adjust *FLAGS accordingly to the platform.
54 include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
56 KBUILD_CPPFLAGS += -I$(srctree)/arch/$(HEADER_ARCH)/include
58 # -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
60 # in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different
62 # These apply to kernelspace only.
64 # strip leading and trailing whitespace to make the USER_CFLAGS removal of these
67 KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
68 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
69 KBUILD_CFLAGS += $(KERNEL_DEFINES)
80 echo '* linux - Binary kernel image (./linux) - for backward'
81 echo ' compatibility only, this creates a hard link to the'
82 echo ' real kernel binary, the "vmlinux" binary you'
83 echo ' find in the kernel root.'
86 KBUILD_KCONFIG := arch/um/Kconfig.$(HEADER_ARCH)
88 archprepare: $(ARCH_DIR)/include/shared/user_constants.h
89 prepare: $(ARCH_DIR)/include/shared/kern_constants.h
91 LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
92 LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
94 CFLAGS_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,)
98 CONFIG_KERNEL_STACK_ORDER ?= 2
99 STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] )
101 CPPFLAGS_vmlinux.lds = -U$(SUBARCH) -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \
102 -DELF_FORMAT="$(ELF_FORMAT)" -DKERNEL_STACK_SIZE=$(STACK_SIZE)
104 # The wrappers will select whether using "malloc" or the kernel allocator.
105 LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
107 LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt))
109 CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
111 $(CC) $(CFLAGS_vmlinux) -o $@ \
112 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
113 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
115 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o \
116 FORCE ,$^) ; rm -f linux
119 # When cleaning we don't include .config, so we don't include
120 # TT or skas makefiles and don't clean skas_ptregs.h.
121 CLEAN_FILES += linux x.i gmon.out \
122 $(ARCH_DIR)/include/shared/user_constants.h \
123 $(ARCH_DIR)/include/shared/kern_constants.h
126 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
127 -o -name '*.gcov' \) -type f -print | xargs rm -f
129 $(objtree)/$(ARCH_DIR)/include/shared:
135 $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s: FORCE
136 $(Q)$(MAKE) $(build)=$(ARCH_DIR)/sys-$(SUBARCH) $@
138 define filechk_gen-asm-offsets
141 echo " * DO NOT MODIFY."; \
143 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
147 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
151 $(ARCH_DIR)/include/shared/user_constants.h: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s
152 $(call filechk,gen-asm-offsets)
154 $(ARCH_DIR)/include/shared/kern_constants.h: $(objtree)/$(ARCH_DIR)/include/shared
156 $(Q)ln -sf ../../../../include/asm/asm-offsets.h $@
158 export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS HEADER_ARCH DEV_NULL_PATH