1 # Makefile for making ELF bootable images for booting on CHRP
4 # Geert Uytterhoeven September 1997
6 # Based on coffboot by Paul Mackerras
7 # Simplified for ppc64 by Todd Inglett
9 # NOTE: this code is built for 32 bit in ELF32 format even though
10 # it packages a 64 bit kernel. We do this to simplify the
11 # bootloader and increase compatibility with OpenFirmware.
13 # To this end we need to define BOOTCC, etc, as the tools
14 # needed to build the 32 bit image. These are normally HOSTCC,
15 # but may be a third compiler if, for example, you are cross
16 # compiling from an intel box. Once the 64bit ppc gcc is
17 # stable it will probably simply be a compiler switch to
18 # compile for 32bit mode.
19 # To make it easier to setup a cross compiler,
20 # CROSS32_COMPILE is setup as a prefix just like CROSS_COMPILE
21 # in the toplevel makefile.
25 BOOTCFLAGS := $(HOSTCFLAGS) -fno-builtin -nostdinc -isystem \
26 $(shell $(CROSS32CC) -print-file-name=include) -fPIC
27 BOOTAFLAGS := -D__ASSEMBLY__ $(BOOTCFLAGS) -traditional -nostdinc
28 OBJCOPYFLAGS := contents,alloc,load,readonly,data
29 OBJCOPY_COFF_ARGS := -O aixcoff-rs6000 --set-start 0x500000
30 OBJCOPY_MIB_ARGS := -O aixcoff-rs6000 -R .stab -R .stabstr -R .comment
32 zlib := inffast.c inflate.c inftrees.c
33 zlibheader := inffast.h inffixed.h inflate.h inftrees.h infutil.h
34 zliblinuxheader := zlib.h zconf.h zutil.h
36 $(addprefix $(obj)/,$(zlib) main.o): $(addprefix $(obj)/,$(zliblinuxheader)) $(addprefix $(obj)/,$(zlibheader))
37 #$(addprefix $(obj)/,main.o): $(addprefix $(obj)/,zlib.h)
39 src-boot := crt0.S string.S prom.c stdio.c main.c div64.S
41 src-boot := $(addprefix $(obj)/, $(src-boot))
42 obj-boot := $(addsuffix .o, $(basename $(src-boot)))
44 ifeq ($(call cc-option-yn, -fstack-protector),y)
45 BOOTCFLAGS += -fno-stack-protector
48 BOOTCFLAGS += -I$(obj) -I$(srctree)/$(obj)
50 quiet_cmd_copy_zlib = COPY $@
51 cmd_copy_zlib = sed "s@__attribute_used__@@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
53 quiet_cmd_copy_zlibheader = COPY $@
54 cmd_copy_zlibheader = sed "s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
56 quiet_cmd_copy_zliblinuxheader = COPY $@
57 cmd_copy_zliblinuxheader = sed "s@<linux/string.h>@\"string.h\"@;s@<linux/kernel.h>@<stddef.h>@;s@<linux/\([^>]\+\).*@\"\1\"@" $< > $@
59 $(addprefix $(obj)/,$(zlib)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
62 $(addprefix $(obj)/,$(zlibheader)): $(obj)/%: $(srctree)/lib/zlib_inflate/%
63 $(call cmd,copy_zlibheader)
65 $(addprefix $(obj)/,$(zliblinuxheader)): $(obj)/%: $(srctree)/include/linux/%
66 $(call cmd,copy_zliblinuxheader)
68 clean-files := $(zlib) $(zlibheader) $(zliblinuxheader)
71 quiet_cmd_bootcc = BOOTCC $@
72 cmd_bootcc = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTCFLAGS) -c -o $@ $<
74 quiet_cmd_bootas = BOOTAS $@
75 cmd_bootas = $(CROSS32CC) -Wp,-MD,$(depfile) $(BOOTAFLAGS) -c -o $@ $<
77 quiet_cmd_bootld = BOOTLD $@
78 cmd_bootld = $(CROSS32LD) -T $(srctree)/$(src)/$(3) -o $@ $(2)
80 $(patsubst %.c,%.o, $(filter %.c, $(src-boot))): %.o: %.c
81 $(call if_changed_dep,bootcc)
82 $(patsubst %.S,%.o, $(filter %.S, $(src-boot))): %.o: %.S
83 $(call if_changed_dep,bootas)
85 #-----------------------------------------------------------
86 # ELF sections within the zImage bootloader/wrapper
87 #-----------------------------------------------------------
88 required := vmlinux.strip
91 obj-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.o, $(section)))
92 src-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.c, $(section)))
93 gz-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.gz, $(section)))
95 hostprogs-y := addnote addRamDisk hack-coff
97 targets += zImage.vmode zImage.initrd.vmode zImage zImage.initrd \
98 zImage.coff zImage.initrd.coff miboot.image miboot.initrd.image \
99 $(patsubst $(obj)/%,%, $(call obj-sec, $(required) $(initrd))) \
100 $(patsubst $(obj)/%,%, $(call src-sec, $(required) $(initrd))) \
101 $(patsubst $(obj)/%,%, $(call gz-sec, $(required) $(initrd))) \
102 vmlinux.initrd dummy.o
105 quiet_cmd_ramdisk = RAMDISK $@
106 cmd_ramdisk = $(obj)/addRamDisk $(obj)/ramdisk.image.gz $< $@
108 quiet_cmd_stripvm = STRIP $@
109 cmd_stripvm = $(STRIP) -s -R .comment $< -o $@
111 vmlinux.strip: vmlinux
112 $(call if_changed,stripvm)
113 $(obj)/vmlinux.initrd: vmlinux.strip $(obj)/addRamDisk $(obj)/ramdisk.image.gz
114 $(call if_changed,ramdisk)
116 quiet_cmd_addsection = ADDSEC $@
117 cmd_addsection = $(CROSS32OBJCOPY) $@ \
118 --add-section=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(patsubst %.o,%.gz, $@) \
119 --set-section-flags=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $@))=$(OBJCOPYFLAGS)
121 quiet_cmd_addnote = ADDNOTE $@
122 cmd_addnote = $(obj)/addnote $@
124 quiet_cmd_gen-miboot = GEN $@
125 cmd_gen-miboot = $(OBJCOPY) $(OBJCOPY_MIB_ARGS) \
126 --add-section=$1=$(word 2, $^) $< $@
128 quiet_cmd_gencoff = COFF $@
129 cmd_gencoff = $(OBJCOPY) $(OBJCOPY_COFF_ARGS) $@ && \
132 $(call gz-sec, $(required)): $(obj)/kernel-%.gz: %
133 $(call if_changed,gzip)
135 $(obj)/kernel-initrd.gz: $(obj)/ramdisk.image.gz
136 cp -f $(obj)/ramdisk.image.gz $@
138 $(call src-sec, $(required) $(initrd)): $(obj)/kernel-%.c: $(obj)/kernel-%.gz
141 $(call obj-sec, $(required) $(initrd)): $(obj)/kernel-%.o: $(obj)/kernel-%.c
142 $(call if_changed_dep,bootcc)
143 $(call cmd,addsection)
145 $(obj)/zImage.vmode $(obj)/zImage.coff: obj-boot += $(call obj-sec, $(required))
146 $(obj)/zImage.vmode: $(call obj-sec, $(required)) $(obj-boot) $(srctree)/$(src)/zImage.lds
147 $(call cmd,bootld,$(obj-boot),zImage.lds)
149 $(obj)/zImage.initrd.vmode $(obj)/zImage.initrd.coff: obj-boot += $(call obj-sec, $(required) $(initrd))
150 $(obj)/zImage.initrd.vmode: $(call obj-sec, $(required) $(initrd)) $(obj-boot) $(srctree)/$(src)/zImage.lds
151 $(call cmd,bootld,$(obj-boot),zImage.lds)
153 # For 32-bit powermacs, build the COFF and miboot images
154 # as well as the ELF images.
155 coffimage-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/zImage.coff
156 coffrdimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/zImage.initrd.coff
157 mibootimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/miboot.image
158 mibrdimg-$(CONFIG_PPC_PMAC)-$(CONFIG_PPC32) := $(obj)/miboot.initrd.image
160 $(obj)/zImage: $(obj)/zImage.vmode $(obj)/addnote $(coffimage-y-y) \
163 $(call if_changed,addnote)
165 $(obj)/zImage.initrd: $(obj)/zImage.initrd.vmode $(obj)/addnote \
166 $(coffrdimg-y-y) $(mibrdimg-y-y)
168 $(call if_changed,addnote)
170 $(obj)/zImage.coff: $(call obj-sec, $(required)) $(obj-boot) \
171 $(srctree)/$(src)/zImage.coff.lds $(obj)/hack-coff
172 $(call cmd,bootld,$(obj-boot),zImage.coff.lds)
175 $(obj)/zImage.initrd.coff: $(call obj-sec, $(required) $(initrd)) $(obj-boot) \
176 $(srctree)/$(src)/zImage.coff.lds $(obj)/hack-coff
177 $(call cmd,bootld,$(obj-boot),zImage.coff.lds)
180 $(obj)/miboot.image: $(obj)/dummy.o $(obj)/vmlinux.gz
181 $(call cmd,gen-miboot,image)
183 $(obj)/miboot.initrd.image: $(obj)/miboot.image $(images)/ramdisk.image.gz
184 $(call cmd,gen-miboot,initrd)
186 #-----------------------------------------------------------
187 # build u-boot images
188 #-----------------------------------------------------------
189 quiet_cmd_mygzip = GZIP $@
190 cmd_mygzip = gzip -f -9 < $< > $@.$$$$ && mv $@.$$$$ $@
192 quiet_cmd_objbin = OBJCOPY $@
193 cmd_objbin = $(OBJCOPY) -O binary $< $@
195 quiet_cmd_uimage = UIMAGE $@
196 cmd_uimage = $(CONFIG_SHELL) $(MKIMAGE) -A ppc -O linux -T kernel \
197 -C gzip -a 00000000 -e 00000000 -n 'Linux-$(KERNELRELEASE)' \
200 MKIMAGE := $(srctree)/scripts/mkuboot.sh
202 extra-y += vmlinux.bin vmlinux.gz
204 $(obj)/vmlinux.bin: vmlinux FORCE
205 $(call if_changed,objbin)
207 $(obj)/vmlinux.gz: $(obj)/vmlinux.bin FORCE
208 $(call if_changed,mygzip)
210 $(obj)/uImage: $(obj)/vmlinux.gz
213 @echo -n ' Image: $@ '
214 @if [ -f $@ ]; then echo 'is ready' ; else echo 'not made'; fi
216 install: $(CONFIGURE) $(BOOTIMAGE)
217 sh -x $(srctree)/$(src)/install.sh "$(KERNELRELEASE)" vmlinux System.map "$(INSTALL_PATH)" "$(BOOTIMAGE)"
219 clean-files += $(addprefix $(objtree)/, $(obj-boot) vmlinux.strip)