tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#
2# Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
3# Licensed under the GPL
4#
5
6ARCH_DIR := arch/um
7OS := $(shell uname -s)
8# We require bash because the vmlinux link and loader script cpp use bash
9# features.
10SHELL := /bin/bash
11
12filechk_gen_header = $<
13
14core-y += $(ARCH_DIR)/kernel/ \
15 $(ARCH_DIR)/drivers/ \
16 $(ARCH_DIR)/os-$(OS)/
17
18# Have to precede the include because the included Makefiles reference them.
19SYMLINK_HEADERS := archparam.h system.h sigcontext.h processor.h ptrace.h \
20 module.h vm-flags.h elf.h
21SYMLINK_HEADERS := $(foreach header,$(SYMLINK_HEADERS),include/asm-um/$(header))
22
23# XXX: The "os" symlink is only used by arch/um/include/os.h, which includes
24# ../os/include/file.h
25#
26# These are cleaned up during mrproper. Please DO NOT fix it again, this is
27# the Correct Thing(tm) to do!
28ARCH_SYMLINKS = include/asm-um/arch $(ARCH_DIR)/include/sysdep $(ARCH_DIR)/os \
29 $(SYMLINK_HEADERS) $(ARCH_DIR)/include/uml-config.h
30
31GEN_HEADERS += $(ARCH_DIR)/include/task.h $(ARCH_DIR)/include/kern_constants.h
32
33um-modes-$(CONFIG_MODE_TT) += tt
34um-modes-$(CONFIG_MODE_SKAS) += skas
35
36MODE_INCLUDE += $(foreach mode,$(um-modes-y),\
37 -I$(srctree)/$(ARCH_DIR)/kernel/$(mode)/include)
38
39MAKEFILES-INCL += $(foreach mode,$(um-modes-y),\
40 $(srctree)/$(ARCH_DIR)/Makefile-$(mode))
41
42ifneq ($(MAKEFILES-INCL),)
43 include $(MAKEFILES-INCL)
44endif
45
46ARCH_INCLUDE := -I$(ARCH_DIR)/include
47ifneq ($(KBUILD_SRC),)
48ARCH_INCLUDE += -I$(ARCH_DIR)/include2
49ARCH_INCLUDE += -I$(srctree)/$(ARCH_DIR)/include
50MRPROPER_DIRS += $(ARCH_DIR)/include2
51endif
52SYS_DIR := $(ARCH_DIR)/include/sysdep-$(SUBARCH)
53
54# -Dvmap=kernel_vmap affects everything, and prevents anything from
55# referencing the libpcap.o symbol so named.
56
57CFLAGS += $(CFLAGS-y) -D__arch_um__ -DSUBARCH=\"$(SUBARCH)\" \
58 $(ARCH_INCLUDE) $(MODE_INCLUDE) -Dvmap=kernel_vmap
59AFLAGS += $(ARCH_INCLUDE)
60
61USER_CFLAGS := $(patsubst -I%,,$(CFLAGS))
62USER_CFLAGS := $(patsubst -D__KERNEL__,,$(USER_CFLAGS)) $(ARCH_INCLUDE) \
63 $(MODE_INCLUDE)
64
65# -Derrno=kernel_errno - This turns all kernel references to errno into
66# kernel_errno to separate them from the libc errno. This allows -fno-common
67# in CFLAGS. Otherwise, it would cause ld to complain about the two different
68# errnos.
69
70CFLAGS += -Derrno=kernel_errno -Dsigprocmask=kernel_sigprocmask
71CFLAGS += $(call cc-option,-fno-unit-at-a-time,)
72
73include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
74
75#This will adjust *FLAGS accordingly to the platform.
76include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
77
78# These are needed for clean and mrproper, since in that case .config is not
79# included; the values here are meaningless
80
81CONFIG_NEST_LEVEL ?= 0
82CONFIG_KERNEL_HALF_GIGS ?= 0
83
84SIZE = (($(CONFIG_NEST_LEVEL) + $(CONFIG_KERNEL_HALF_GIGS)) * 0x20000000)
85
86ifeq ($(CONFIG_MODE_SKAS), y)
87$(SYS_HEADERS) : $(ARCH_DIR)/include/skas_ptregs.h
88endif
89
90.PHONY: linux
91
92all: linux
93
94linux: vmlinux
95 ln -f $< $@
96
97define archhelp
98 echo '* linux - Binary kernel image (./linux) - for backward'
99 echo ' compatibility only, this creates a hard link to the'
100 echo ' real kernel binary, the the "vmlinux" binary you'
101 echo ' find in the kernel root.'
102endef
103
104ifneq ($(KBUILD_SRC),)
105$(shell mkdir -p $(ARCH_DIR) && ln -fsn $(srctree)/$(ARCH_DIR)/Kconfig.$(SUBARCH) $(ARCH_DIR)/Kconfig.arch)
106else
107$(shell cd $(ARCH_DIR) && ln -sf Kconfig.$(SUBARCH) Kconfig.arch)
108endif
109
110archprepare: $(ARCH_SYMLINKS) $(SYS_HEADERS) $(GEN_HEADERS)
111
112LINK-$(CONFIG_LD_SCRIPT_STATIC) += -static
113LINK-$(CONFIG_LD_SCRIPT_DYN) += -Wl,-rpath,/lib
114
115CPP_MODE-$(CONFIG_MODE_TT) := -DMODE_TT
116CONFIG_KERNEL_STACK_ORDER ?= 2
117STACK_SIZE := $(shell echo $$[ 4096 * (1 << $(CONFIG_KERNEL_STACK_ORDER)) ] )
118
119ifndef START
120 START = $(shell echo $$[ $(TOP_ADDR) - $(SIZE) ] )
121endif
122
123CPPFLAGS_vmlinux.lds = -U$(SUBARCH) \
124 -DSTART=$(START) -DELF_ARCH=$(ELF_ARCH) \
125 -DELF_FORMAT="$(ELF_FORMAT)" $(CPP_MODE-y) \
126 -DKERNEL_STACK_SIZE=$(STACK_SIZE) \
127 -DUNMAP_PATH=arch/um/sys-$(SUBARCH)/unmap_fin.o
128
129#The wrappers will select whether using "malloc" or the kernel allocator.
130LINK_WRAPS = -Wl,--wrap,malloc -Wl,--wrap,free -Wl,--wrap,calloc
131
132CFLAGS_vmlinux := $(LINK-y) $(LINK_WRAPS)
133define cmd_vmlinux__
134 $(CC) $(CFLAGS_vmlinux) -o $@ \
135 -Wl,-T,$(vmlinux-lds) $(vmlinux-init) \
136 -Wl,--start-group $(vmlinux-main) -Wl,--end-group \
137 -lutil \
138 $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) \
139 FORCE ,$^) ; rm -f linux
140endef
141
142#When cleaning we don't include .config, so we don't include
143#TT or skas makefiles and don't clean skas_ptregs.h.
144CLEAN_FILES += linux x.i gmon.out $(ARCH_DIR)/include/uml-config.h \
145 $(GEN_HEADERS) $(ARCH_DIR)/include/skas_ptregs.h \
146 $(ARCH_DIR)/include/user_constants.h $(ARCH_DIR)/Kconfig.arch
147
148MRPROPER_FILES += $(SYMLINK_HEADERS) $(ARCH_SYMLINKS) \
149 $(addprefix $(ARCH_DIR)/kernel/,$(KERN_SYMLINKS)) $(ARCH_DIR)/os
150
151archclean:
152 $(Q)$(MAKE) $(clean)=$(ARCH_DIR)/util
153 $(Q)$(MAKE) $(clean)=$(ARCH_DIR)/os-$(OS)/util
154 @find . \( -name '*.bb' -o -name '*.bbg' -o -name '*.da' \
155 -o -name '*.gcov' \) -type f -print | xargs rm -f
156
157$(SYMLINK_HEADERS):
158 @echo ' SYMLINK $@'
159ifneq ($(KBUILD_SRC),)
160 ln -fsn $(srctree)/include/asm-um/$(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $@
161else
162 $(Q)cd $(TOPDIR)/$(dir $@) ; \
163 ln -sf $(basename $(notdir $@))-$(SUBARCH)$(suffix $@) $(notdir $@)
164endif
165
166include/asm-um/arch:
167 @echo ' SYMLINK $@'
168ifneq ($(KBUILD_SRC),)
169 $(Q)mkdir -p include/asm-um
170 $(Q)ln -fsn $(srctree)/include/asm-$(SUBARCH) include/asm-um/arch
171else
172 $(Q)cd $(TOPDIR)/include/asm-um && ln -sf ../asm-$(SUBARCH) arch
173endif
174
175$(ARCH_DIR)/include/sysdep:
176 @echo ' SYMLINK $@'
177ifneq ($(KBUILD_SRC),)
178 $(Q)mkdir -p $(ARCH_DIR)/include
179 $(Q)mkdir -p $(ARCH_DIR)/include2
180 $(Q)ln -fsn sysdep-$(SUBARCH) $(ARCH_DIR)/include/sysdep
181 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/include/sysdep-$(SUBARCH) $(ARCH_DIR)/include2/sysdep
182else
183 $(Q)cd $(ARCH_DIR)/include && ln -sf sysdep-$(SUBARCH) sysdep
184endif
185
186$(ARCH_DIR)/os:
187 @echo ' SYMLINK $@'
188ifneq ($(KBUILD_SRC),)
189 $(Q)ln -fsn $(srctree)/$(ARCH_DIR)/os-$(OS) $(ARCH_DIR)/os
190else
191 $(Q)cd $(ARCH_DIR) && ln -sf os-$(OS) os
192endif
193
194# Generated files
195define filechk_umlconfig
196 sed 's/ CONFIG/ UML_CONFIG/'
197endef
198
199define filechk_gen-asm-offsets
200 (set -e; \
201 echo "#ifndef __ASM_OFFSETS_H__"; \
202 echo "#define __ASM_OFFSETS_H__"; \
203 echo "/*"; \
204 echo " * DO NOT MODIFY."; \
205 echo " *"; \
206 echo " * This file was generated by arch/$(ARCH)/Makefile"; \
207 echo " *"; \
208 echo " */"; \
209 echo ""; \
210 sed -ne "/^->/{s:^->\([^ ]*\) [\$$#]*\([^ ]*\) \(.*\):#define \1 \2 /* \3 */:; s:->::; p;}"; \
211 echo ""; \
212 echo "#endif" )
213endef
214
215$(ARCH_DIR)/include/uml-config.h : include/linux/autoconf.h
216 $(call filechk,umlconfig)
217
218$(ARCH_DIR)/user-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/user-offsets.c
219 $(CC) $(USER_CFLAGS) -S -o $@ $<
220
221$(ARCH_DIR)/user-offsets.h: $(ARCH_DIR)/user-offsets.s
222 $(call filechk,gen-asm-offsets)
223
224CLEAN_FILES += $(ARCH_DIR)/user-offsets.s $(ARCH_DIR)/user-offsets.h
225
226$(ARCH_DIR)/kernel-offsets.s: $(ARCH_DIR)/sys-$(SUBARCH)/kernel-offsets.c \
227 $(ARCH_SYMLINKS) \
228 $(SYS_DIR)/sc.h \
229 include/asm include/linux/version.h \
230 include/config/MARKER \
231 $(ARCH_DIR)/include/user_constants.h
232 $(CC) $(CFLAGS) $(NOSTDINC_FLAGS) $(CPPFLAGS) -S -o $@ $<
233
234$(ARCH_DIR)/kernel-offsets.h: $(ARCH_DIR)/kernel-offsets.s
235 $(call filechk,gen-asm-offsets)
236
237CLEAN_FILES += $(ARCH_DIR)/kernel-offsets.s $(ARCH_DIR)/kernel-offsets.h
238
239$(ARCH_DIR)/include/task.h: $(ARCH_DIR)/util/mk_task
240 $(call filechk,gen_header)
241
242$(ARCH_DIR)/include/user_constants.h: $(ARCH_DIR)/os-$(OS)/util/mk_user_constants
243 $(call filechk,gen_header)
244
245$(ARCH_DIR)/include/kern_constants.h: $(ARCH_DIR)/util/mk_constants
246 $(call filechk,gen_header)
247
248$(ARCH_DIR)/include/skas_ptregs.h: $(ARCH_DIR)/kernel/skas/util/mk_ptregs
249 $(call filechk,gen_header)
250
251$(ARCH_DIR)/os-$(OS)/util/mk_user_constants: $(ARCH_DIR)/os-$(OS)/util FORCE ;
252
253$(ARCH_DIR)/util/mk_task $(ARCH_DIR)/util/mk_constants: $(ARCH_DIR)/include/user_constants.h $(ARCH_DIR)/util \
254 FORCE ;
255
256$(ARCH_DIR)/kernel/skas/util/mk_ptregs: $(ARCH_DIR)/kernel/skas/util FORCE ;
257
258$(ARCH_DIR)/util: scripts_basic $(SYS_DIR)/sc.h $(ARCH_DIR)/kernel-offsets.h FORCE
259 $(Q)$(MAKE) $(build)=$@
260
261$(ARCH_DIR)/kernel/skas/util: scripts_basic $(ARCH_DIR)/user-offsets.h FORCE
262 $(Q)$(MAKE) $(build)=$@
263
264$(ARCH_DIR)/os-$(OS)/util: scripts_basic $(ARCH_DIR)/user-offsets.h FORCE
265 $(Q)$(MAKE) $(build)=$@
266
267export SUBARCH USER_CFLAGS OS