AuxXxilium/linux_dsm_epyc7002
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linux_dsm_epyc7002/arch/powerpc/boot
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Joel Stanley ee9d21b3b3 powerpc/boot: Ensure _zimage_start is a weak symbol 
When building with clang crt0's _zimage_start is not marked weak, which
breaks the build when linking the kernel image:

 $ objdump -t arch/powerpc/boot/crt0.o |grep _zimage_start$
 0000000000000058 g       .text  0000000000000000 _zimage_start

 ld: arch/powerpc/boot/wrapper.a(crt0.o): in function '_zimage_start':
 (.text+0x58): multiple definition of '_zimage_start';
 arch/powerpc/boot/pseries-head.o:(.text+0x0): first defined here

Clang requires the .weak directive to appear after the symbol is
declared. The binutils manual says:

 This directive sets the weak attribute on the comma separated list of
 symbol names. If the symbols do not already exist, they will be
 created.

So it appears this is different with clang. The only reference I could
see for this was an OpenBSD mailing list post[1].

Changing it to be after the declaration fixes building with Clang, and
still works with GCC.

 $ objdump -t arch/powerpc/boot/crt0.o |grep _zimage_start$
 0000000000000058  w      .text	0000000000000000 _zimage_start

Reported to clang as https://bugs.llvm.org/show_bug.cgi?id=38921

[1] https://groups.google.com/forum/#!topic/fa.openbsd.tech/PAgKKen2YCY

Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2018-09-19 22:08:12 +10:00
..
dts powerpc updates for 4.19 2018-08-17 11:32:50 -07:00
.gitignore .gitignore: move *.dtb and *.dtb.S patterns to the top-level .gitignore 2017-11-08 11:20:24 -06:00
4xx.c powerpc/44x: Fix mask and shift to zero bug 2017-08-31 14:26:06 +10:00
4xx.h
44x.h
addnote.c powerpc/boot: Add 64bit and little endian support to addnote 2014-04-28 17:36:00 +10:00
bamboo.c
cpm-serial.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
crt0.S powerpc/boot: Ensure _zimage_start is a weak symbol 2018-09-19 22:08:12 +10:00
crtsavres.S powerpc/64: Do not link crtsaveres.o in boot 2017-05-30 14:59:51 +10:00
cuboot-8xx.c
cuboot-52xx.c
cuboot-83xx.c
cuboot-85xx-cpm2.c
cuboot-85xx.c
cuboot-824x.c
cuboot-acadia.c
cuboot-amigaone.c
cuboot-bamboo.c
cuboot-ebony.c
cuboot-hotfoot.c
cuboot-katmai.c
cuboot-kilauea.c
cuboot-mpc7448hpc2.c
cuboot-pq2.c
cuboot-rainier.c
cuboot-sam440ep.c
cuboot-sequoia.c
cuboot-taishan.c
cuboot-warp.c
cuboot-yosemite.c
cuboot.c
cuboot.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
dcr.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
decompress.c powerpc/boot: Add support for XZ compression 2016-09-28 14:35:14 +10:00
devtree.c
div64.S powerpc/boot: Add extended precision shifts to the boot wrapper. 2011-12-09 07:49:27 -05:00
dummy.c
ebony.c
elf_util.c powerpc/boot: Add little endian support to elf utils 2014-04-28 17:36:04 +10:00
elf.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ep88xc.c
ep405.c
ep8248e.c
epapr-wrapper.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
epapr.c powerpc/zImage: make the "OF" wrapper support ePAPR boot 2013-09-25 14:18:44 +10:00
fixed-head.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
fixup-headers.sed powerpc/boot: Add sed script 2016-09-28 14:20:44 +10:00
fsl-soc.c
fsl-soc.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
gamecube-head.S
gamecube.c
hack-coff.c
holly.c
install.sh
io.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
libfdt_env.h powerpc/boot: Remove duplicate typedefs from libfdt_env.h 2018-04-01 00:47:47 +11:00
libfdt-wrapper.c powerpc/boot/fdt: Use unsigned long for pointer casts 2015-03-16 18:58:30 +11:00
main.c powerpc/boot: Fix the early OPAL console wrappers 2016-11-24 17:34:01 +11:00
Makefile powerpc/Makefiles: Convert ifeq to ifdef where possible 2018-08-08 00:32:36 +10:00
mktree.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
motload-head.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mpc8xx.c powerpc/boot: remove unused variable in mpc8xx 2018-06-04 00:39:17 +10:00
mpc8xx.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mpc52xx-psc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
mvme5100.c powerpc/embedded6xx: Add support for Motorola/Emerson MVME5100 2014-01-09 17:52:20 -06:00
mvme7100.c powerpc/86xx: Add support for Emerson/Artesyn MVME7100 2016-07-08 20:01:27 -05:00
ns16550.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
of.c powerpc/boot: Rework of_claim() to make it 64bit friendly 2014-04-28 17:35:43 +10:00
of.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ofconsole.c powerpc/boot: Add byteswapping routines in oflib 2014-04-28 17:35:35 +10:00
oflib.c powerpc/boot: Define a routine to enter prom 2014-04-28 17:36:08 +10:00
opal-calls.S powerpc/boot: Fix the early OPAL console wrappers 2016-11-24 17:34:01 +11:00
opal.c powerpc/boot: Fix build failure in 32-bit boot wrapper 2016-11-28 22:58:13 +11:00
ops.h powerpc/boot: Remove support for Marvell MPSC serial controller 2018-06-04 00:39:22 +10:00
page.h powerpc: Fix _ALIGN_* errors due to type difference. 2015-10-09 08:02:25 +11:00
planetcore.c powerpc/boot: drop planetcore_set_serial_speed 2015-03-16 18:50:17 +11:00
planetcore.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ppc_asm.h powerpc/time: refactor MFTB() to limit number of ifdefs 2017-08-10 23:32:09 +10:00
ppcboot-hotfoot.h
ppcboot.h powerpc/86xx: Add support for Emerson/Artesyn MVME7100 2016-07-08 20:01:27 -05:00
pq2.c
pq2.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ps3-head.S powerpc/ps3: Fix system hang with GCC 5 builds 2016-11-30 23:19:59 +11:00
ps3-hvcall.S
ps3.c powerpc/ps3: Fix system hang with GCC 5 builds 2016-11-30 23:19:59 +11:00
pseries-head.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
README
redboot-8xx.c
redboot-83xx.c
redboot.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
reg.h
rs6000.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
serial.c powerpc/boot: Remove support for Marvell MPSC serial controller 2018-06-04 00:39:22 +10:00
simple_alloc.c
simpleboot.c powerpc/simpleboot: fix comment 2014-08-26 09:35:57 +02:00
stdbool.h powerpc/boot: Add support for XZ compression 2016-09-28 14:35:14 +10:00
stdint.h powerpc/boot: Add support for XZ compression 2016-09-28 14:35:14 +10:00
stdio.c powerpc: boot: add strrchr function 2018-03-05 20:58:17 -06:00
stdio.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
stdlib.c
stdlib.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
string.h powerpc: boot: add strrchr function 2018-03-05 20:58:17 -06:00
string.S
swab.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
treeboot-akebono.c powerpc: Fix misspellings in comments. 2016-03-01 19:27:20 +11:00
treeboot-bamboo.c
treeboot-currituck.c powerpc: Fix misspellings in comments. 2016-03-01 19:27:20 +11:00
treeboot-ebony.c
treeboot-iss4xx.c powerpc: Fix misspellings in comments. 2016-03-01 19:27:20 +11:00
treeboot-walnut.c
types.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
uartlite.c
ugecon.c
ugecon.h
util.S powerpc/time: refactor MFTB() to limit number of ifdefs 2017-08-10 23:32:09 +10:00
virtex405-head.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
virtex.c
wii-head.S
wii.c
wrapper kbuild: Use ls(1) instead of stat(1) to obtain file size 2018-03-26 02:01:24 +09:00
xz_config.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
zImage.coff.lds.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
zImage.lds.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
zImage.ps3.lds.S License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00

README 

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


	Peter