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 SHARED_HEADERS := $(ARCH_DIR)/include/shared
26 ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS)
27 ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH)/shared
28 KBUILD_CPPFLAGS += -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH)
30 # -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
31 # named - it's a common symbol in libpcap, so we get a binary which crashes.
33 # Same things for in6addr_loopback and mktime - found in libc. For these two we
34 # only get link-time error, luckily.
36 # These apply to USER_CFLAGS to.
38 KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
39 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
40 -Din6addr_loopback=kernel_in6addr_loopback \
41 -Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
43 KBUILD_AFLAGS += $(ARCH_INCLUDE)
45 USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
46 $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
47 $(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64 -idirafter include
49 include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
51 #This will adjust *FLAGS accordingly to the platform.
52 include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
54 KBUILD_CPPFLAGS += -I$(srctree)/arch/$(HEADER_ARCH)/include
56 # -Derrno=kernel_errno - This turns all kernel references to errno into
57 # kernel_errno to separate them from the libc errno. This allows -fno-common
58 # in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different
60 # These apply to kernelspace only.
62 # strip leading and trailing whitespace to make the USER_CFLAGS removal of these
65 KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
66 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
67 KBUILD_CFLAGS += $(KERNEL_DEFINES)
78 echo '* linux - Binary kernel image (./linux) - for backward'
79 echo ' compatibility only, this creates a hard link to the'
80 echo ' real kernel binary, the "vmlinux" binary you'
81 echo ' find in the kernel root.'
84 KBUILD_KCONFIG := arch/um/Kconfig.$(HEADER_ARCH)
86 archprepare: include/generated/user_constants.h
88 LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
89 LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
91 CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
92 $(call cc-option, -fno-stack-protector,) \
93 $(call cc-option, -fno-stack-protector-all,)
95 # Options used by linker script
96 export LDS_START := $(START)
97 export LDS_ELF_ARCH := $(ELF_ARCH)
98 export LDS_ELF_FORMAT := $(ELF_FORMAT)
100 # The wrappers will select whether using "malloc" or the kernel allocator.
101 LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
103 LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt))
105 CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
107 $(CC) $(CFLAGS_vmlinux) -o $@ \
108 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
109 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
111 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o \
112 FORCE ,$^) ; rm -f linux
115 # When cleaning we don't include .config, so we don't include
116 # TT or skas makefiles and don't clean skas_ptregs.h.
117 CLEAN_FILES += linux x.i gmon.out
120 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
121 -o -name '*.gcov' \) -type f -print | xargs rm -f
125 $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s: FORCE
126 $(Q)$(MAKE) $(build)=$(ARCH_DIR)/sys-$(SUBARCH) $@
128 define filechk_gen-asm-offsets
131 echo " * DO NOT MODIFY."; \
133 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
137 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
141 include/generated/user_constants.h: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.s
142 $(call filechk,gen-asm-offsets)
144 export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS HEADER_ARCH DEV_NULL_PATH