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
24 include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
26 SHARED_HEADERS := $(ARCH_DIR)/include/shared
27 ARCH_INCLUDE := -I$(srctree)/$(SHARED_HEADERS)
28 ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/sys-$(HEADER_ARCH)/shared
29 KBUILD_CPPFLAGS += -I$(srctree)/$(ARCH_DIR)/sys-$(HEADER_ARCH)
31 # -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
32 # named - it's a common symbol in libpcap, so we get a binary which crashes.
34 # Same things for in6addr_loopback and mktime - found in libc. For these two we
35 # only get link-time error, luckily.
37 # These apply to USER_CFLAGS to.
39 KBUILD_CFLAGS += $(CFLAGS) $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
40 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap \
41 -Din6addr_loopback=kernel_in6addr_loopback \
42 -Din6addr_any=kernel_in6addr_any -Dstrrchr=kernel_strrchr
44 KBUILD_AFLAGS += $(ARCH_INCLUDE)
46 USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
47 $(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
48 $(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64 -idirafter include
50 #This will adjust *FLAGS accordingly to the platform.
51 include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
53 KBUILD_CPPFLAGS += -I$(srctree)/arch/$(HEADER_ARCH)/include
55 # -Derrno=kernel_errno - This turns all kernel references to errno into
56 # kernel_errno to separate them from the libc errno. This allows -fno-common
57 # in KBUILD_CFLAGS. Otherwise, it would cause ld to complain about the two different
59 # These apply to kernelspace only.
61 # strip leading and trailing whitespace to make the USER_CFLAGS removal of these
64 KERNEL_DEFINES = $(strip -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask \
65 -Dmktime=kernel_mktime $(ARCH_KERNEL_DEFINES))
66 KBUILD_CFLAGS += $(KERNEL_DEFINES)
77 echo '* linux - Binary kernel image (./linux) - for backward'
78 echo ' compatibility only, this creates a hard link to the'
79 echo ' real kernel binary, the "vmlinux" binary you'
80 echo ' find in the kernel root.'
83 KBUILD_KCONFIG := arch/um/Kconfig.$(HEADER_ARCH)
85 archprepare: include/generated/user_constants.h
87 LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
88 LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
90 CFLAGS_NO_HARDENING := $(call cc-option, -fno-PIC,) $(call cc-option, -fno-pic,) \
91 $(call cc-option, -fno-stack-protector,) \
92 $(call cc-option, -fno-stack-protector-all,)
94 # Options used by linker script
95 export LDS_START := $(START)
96 export LDS_ELF_ARCH := $(ELF_ARCH)
97 export LDS_ELF_FORMAT := $(ELF_FORMAT)
99 # The wrappers will select whether using "malloc" or the kernel allocator.
100 LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
102 LD_FLAGS_CMDLINE = $(foreach opt,$(LDFLAGS),-Wl,$(opt))
104 CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS) $(LD_FLAGS_CMDLINE)
106 $(CC) $(CFLAGS_vmlinux) -o $@ \
107 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
108 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
110 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) vmlinux.o \
111 FORCE ,$^) ; rm -f linux
114 # When cleaning we don't include .config, so we don't include
115 # TT or skas makefiles and don't clean skas_ptregs.h.
116 CLEAN_FILES += linux x.i gmon.out
119 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
120 -o -name '*.gcov' \) -type f -print | xargs rm -f
124 $(ARCH_DIR)/sys-$(HEADER_ARCH)/user-offsets.s: FORCE
125 $(Q)$(MAKE) $(build)=$(ARCH_DIR)/sys-$(HEADER_ARCH) $@
127 define filechk_gen-asm-offsets
130 echo " * DO NOT MODIFY."; \
132 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
136 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
140 include/generated/user_constants.h: $(ARCH_DIR)/sys-$(HEADER_ARCH)/user-offsets.s
141 $(call filechk,gen-asm-offsets)
143 export SUBARCH USER_CFLAGS CFLAGS_NO_HARDENING OS HEADER_ARCH DEV_NULL_PATH