lkml.org 
[lkml]   [2003]   [Feb]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRE: zImage now holds vmlinux, System.map and config in sections. (fwd)
Date
>I don't know linker scripts very well.
>Can this be done for all architectures?
>I'd like to see a solution that is arch-independent.

In embedded systems it is probably not desirable to keep
System.map and config in zImage (takes too much valuable space).

/Mikael

-----Original Message-----
From: linux-kernel-owner@vger.kernel.org
[mailto:linux-kernel-owner@vger.kernel.org]On Behalf Of Randy.Dunlap
Sent: Monday, February 24, 2003 8:58 PM
To: linux-kernel@vger.kernel.org
Cc: tinglett@vnet.ibm.com; torvalds@transmeta.com
Subject: Re: zImage now holds vmlinux, System.map and config in
sections. (fwd)

| Date: Fri, 7 Feb 2003 21:36:21 +0000
| From: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
| To: BK Commits List: ;
| Subject: zImage now holds vmlinux, System.map and config in sections.
|
| ChangeSet 1.914.1.34, 2003/02/07 15:36:21-06:00, tinglett@vnet.ibm.com
|
| zImage now holds vmlinux, System.map and config in sections.


I'm very happy to see such a patch added to Linux (especially referring
to saving the .config file in the kernel image). This is nice.

I've had such a patch for several months now but it's not quite as
simple as this one....so... I don't know linker scripts very well.
Can this be done for all architectures?
I'd like to see a solution that is arch-independent.
And I do prefer to see the config data saved with the kernel image file
(like this) and accessible even when the kernel isn't running, instead
of only being available in /proc/config.gz when that kernel is running.

Thanks,
~Randy




| diff -Nru a/arch/ppc64/boot/Makefile b/arch/ppc64/boot/Makefile
| --- a/arch/ppc64/boot/Makefile Sat Feb 22 13:05:38 2003
| +++ b/arch/ppc64/boot/Makefile Sat Feb 22 13:05:38 2003
| @@ -24,35 +24,45 @@
| #CROSS32_COMPILE = /usr/local/ppc/bin/powerpc-linux-
|
| +#-----------------------------------------------------------
| +# ELF sections within the zImage bootloader/wrapper
| +#-----------------------------------------------------------
| +required := vmlinux .config System.map
| +initrd := initrd
| +
| +obj-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.o, $(section)))
| +src-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.c, $(section)))
| +gz-sec = $(foreach section, $(1), $(patsubst %,$(obj)/kernel-%.gz, $(section)))
| +
| +host-progs := piggy addnote addSystemMap addRamDisk
| +EXTRA_TARGETS += zImage zImage.initrd imagesize.c \
| + $(patsubst $(obj)/%,%, $(call obj-sec, $(required) $(initrd))) \
| + $(patsubst $(obj)/%,%, $(call src-sec, $(required) $(initrd))) \
| + $(patsubst $(obj)/%,%, $(call gz-sec, $(required) $(initrd))) \
| vmlinux.sm vmlinux.initrd vmlinux.sminitrd \
| sysmap.o initrd.o
|
| @@ -69,42 +79,48 @@
| $(obj)/vmlinux.sminitrd: $(obj)/vmlinux.sm $(obj)/addRamDisk $(obj)/ramdisk.image.gz FORCE
| $(call if_changed,ramdisk)
|
| +$(obj)/sysmap.o: System.map $(obj)/piggyback
| + $(call if_changed,piggy)
| +
| +addsection = $(BOOTOBJCOPY) $(1) \
| + --add-section=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $(1)))=$(patsubst %.o,%.gz, $(1)) \
| + --set-section-flags=.kernel:$(strip $(patsubst $(obj)/kernel-%.o,%, $(1)))=$(OBJCOPYFLAGS)
| +
| +quiet_cmd_addnote = ADDNOTE $@
| + cmd_addnote = $(BOOTLD) $(BOOTLFLAGS) -o $@ $(obj-boot) && $(obj)/addnote $@
|
| quiet_cmd_piggy = PIGGY $@
| cmd_piggy = $(obj)/piggyback $(@:.o=) < $< | $(BOOTAS) -o $@
|
| -$(obj)/image.o: $(obj)/vmlinux.gz $(obj)/piggyback FORCE
| - $(call if_changed,piggy)
| +$(call gz-sec, $(required)): $(obj)/kernel-%.gz: %
| + $(call if_changed,gzip)
|
| -$(obj)/sysmap.o: System.map $(obj)/piggyback FORCE
| - $(call if_changed,piggy)
| +$(obj)/kernel-initrd.gz: $(obj)/ramdisk.image.gz
| + cp -f $(obj)/ramdisk.image.gz $@
|
| -$(obj)/initrd.o: $(obj)/ramdisk.image.gz $(obj)/piggyback FORCE
| - $(call if_changed,piggy)
| +$(call src-sec, $(required) $(initrd)): $(obj)/kernel-%.c: $(obj)/kernel-%.gz
| + touch $@
|
| -quiet_cmd_addnote = ADDNOTE $@
| - cmd_addnote = $(BOOTLD) $(LD_ARGS) -T $(obj)/zImage.lds -o $@ $(OBJS) $<\
| - && $(obj)/addnote $@
| +$(call obj-sec, $(required) $(initrd)): $(obj)/kernel-%.o: $(obj)/kernel-%.c
| + $(call if_changed_dep,bootcc)
| + $(call addsection, $@)
|
| -$(obj)/zImage: $(obj)/no_initrd.o $(OBJS) $(obj)/addnote FORCE
| +$(obj)/zImage: obj-boot += $(call obj-sec, $(required))
| +$(obj)/zImage: $(call obj-sec, $(required)) $(obj-boot) $(obj)/addnote FORCE
| $(call if_changed,addnote)
|
| -$(obj)/zImage.initrd: $(obj)/initrd.o $(OBJS) $(obj)/addnote FORCE
| +$(obj)/zImage.initrd: obj-boot += $(call obj-sec, $(required) $(initrd))
| +$(obj)/zImage.initrd: $(call obj-sec, $(required) $(initrd)) $(obj-boot) $(obj)/addnote FORCE
| $(call if_changed,addnote)
|
| -$(obj)/vmlinux.bin: vmlinux FORCE
| - $(call if_changed,objcopy)
| -
| -$(obj)/vmlinux.gz: $(obj)/vmlinux.bin FORCE
| - $(call if_changed,gzip)
| -
| $(obj)/imagesize.c: vmlinux
| @echo Generating $@
| ls -l vmlinux | \
| awk '{printf "/* generated -- do not edit! */\n" \
| - "int uncompressed_size = %d;\n", $$5}' > $(obj)/imagesize.c
| + "unsigned long vmlinux_filesize = %d;\n", $$5}' > $(obj)/imagesize.c
| $(CROSS_COMPILE)nm -n vmlinux | tail -1 | \
| - awk '{printf "long vmlinux_end = 0x%s;\n", substr($$1,8)}' \
| + awk '{printf "unsigned long vmlinux_memsize = 0x%s;\n", substr($$1,8)}' \
| >> $(obj)/imagesize.c
|
| -clean-files := $(targets)
| +
| +clean-files := $(patsubst $(obj)/%,%, $(obj-boot))
| diff -Nru a/arch/ppc64/boot/README b/arch/ppc64/boot/README
| --- /dev/null Wed Dec 31 16:00:00 1969
| +++ b/arch/ppc64/boot/README Sat Feb 22 13:05:38 2003
| @@ -0,0 +1,11 @@
| +
| +To extract the kernel vmlinux, System.map, .config or initrd from the zImage binary:
| +
| +objcopy -j .kernel:vmlinux -O binary zImage vmlinux.gz
| +objcopy -j .kernel:System.map -O binary zImage System.map.gz
| +objcopy -j .kernel:.config -O binary zImage config.gz
| +objcopy -j .kernel:initrd -O binary zImage.initrd initrd.gz


| diff -Nru a/arch/ppc64/boot/zImage.lds b/arch/ppc64/boot/zImage.lds
| --- a/arch/ppc64/boot/zImage.lds Sat Feb 22 13:05:38 2003
| +++ b/arch/ppc64/boot/zImage.lds Sat Feb 22 13:05:38 2003
| @@ -58,6 +58,27 @@
| *(.dynamic)
| CONSTRUCTORS
| }
| +
| + . = ALIGN(4096);
| + _vmlinux_start = .;
| + .kernel:vmlinux : { *(.kernel:vmlinux) }
| + _vmlinux_end = .;
| +
| + . = ALIGN(4096);
| + _dotconfig_start = .;
| + .kernel:.config : { *(.kernel:.config) }
| + _dotconfig_end = .;
| +
| + . = ALIGN(4096);
| + _sysmap_start = .;
| + .kernel:System.map : { *(.kernel:System.map) }
| + _sysmap_end = .;
| +
| + . = ALIGN(4096);
| + _initrd_start = .;
| + .kernel:initrd : { *(.kernel:initrd) }
| + _initrd_end = .;
| +
| . = ALIGN(4096);
| _edata = .;
| PROVIDE (edata = .);
| -
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:33    [from the cache]
©2003-2014 Jasper Spaans. Advertise on this site