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40a75584e5
linux/arch/powerpc/boot
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Joel Stanley 40a75584e5 powerpc/boot: Build wrapper for an appropriate CPU 
Currently the boot wrapper lacks a -mcpu option, so it will be built for
the toolchain's default cpu. This is a problem if the toolchain defaults
to a cpu with newer instructions.

We could wire in TARGET_CPU but instead use the oldest supported option
so the wrapper runs anywhere.

The GCC documentation stays that -mcpu=powerpc64le will give us a
generic 64 bit powerpc machine:

 -mcpu=powerpc, -mcpu=powerpc64, and -mcpu=powerpc64le specify pure
 32-bit PowerPC (either endian), 64-bit big endian PowerPC and 64-bit
 little endian PowerPC architecture machine types, with an appropriate,
 generic processor model assumed for scheduling purposes.

So do that for each of the three machines.

This bug was found when building the kernel with a toolchain that
defaulted to powre10, resulting in a pcrel enabled wrapper which fails
to link:

 arch/powerpc/boot/wrapper.a(crt0.o): in function `p_base':
 (.text+0x150): call to `platform_init' lacks nop, can't restore toc; (toc save/adjust stub)
 (.text+0x154): call to `start' lacks nop, can't restore toc; (toc save/adjust stub)
 powerpc64le-buildroot-linux-gnu-ld: final link failed: bad value

Even with tha bug worked around the resulting kernel would crash on a
power9 box:

 $ qemu-system-ppc64 -nographic -nodefaults -M powernv9 -kernel arch/powerpc/boot/zImage.epapr -serial mon:stdio
 [    7.069331356,5] INIT: Starting kernel at 0x20010020, fdt at 0x3068c628 25694 bytes
 [    7.130374661,3] ***********************************************
 [    7.131072886,3] Fatal Exception 0xe40 at 00000000200101e4    MSR 9000000000000001
 [    7.131290613,3] CFAR : 000000002001027c MSR  : 9000000000000001
 [    7.131433759,3] SRR0 : 0000000020010050 SRR1 : 9000000000000001
 [    7.131577775,3] HSRR0: 00000000200101e4 HSRR1: 9000000000000001
 [    7.131733687,3] DSISR: 00000000         DAR  : 0000000000000000
 [    7.131905162,3] LR   : 0000000020010280 CTR  : 0000000000000000
 [    7.132068356,3] CR   : 44002004         XER  : 00000000

Signed-off-by: Joel Stanley <joel@jms.id.au>
Reviewed-by: Murilo Opsfelder Araujo <muriloo@linux.ibm.com>
Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
BugLink: https://github.com/linuxppc/issues/issues/400
Link: https://lore.kernel.org/r/20220330112437.540214-1-joel@jms.id.au
2022-04-27 13:03:16 +10:00
..
dts powerpc: dts: t1040rdb: fix ports names for Seville Ethernet switch 2022-02-02 20:32:10 +11:00
.gitignore powerpc/boot: Add otheros-too-big.bld to .gitignore 2022-02-15 22:29:52 +11:00
4xx.c powerpc/44x: Adjust indentation in ibm4xx_denali_fixup_memsize 2020-01-06 16:25:27 +11:00
4xx.h
44x.h
addnote.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
bamboo.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
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/toc: Future proof kernel toc 2021-12-23 22:35:01 +11:00
crtsavres.S powerpc/64: Do not link crtsaveres.o in boot 2017-05-30 14:59:51 +10:00
cuboot-8xx.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cuboot-52xx.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cuboot-83xx.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cuboot-85xx-cpm2.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cuboot-85xx.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cuboot-824x.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cuboot-acadia.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cuboot-amigaone.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cuboot-bamboo.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cuboot-ebony.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cuboot-hotfoot.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cuboot-katmai.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cuboot-kilauea.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cuboot-mpc7448hpc2.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 40 2019-05-24 17:27:12 +02:00
cuboot-pq2.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cuboot-rainier.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
cuboot-sam440ep.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cuboot-sequoia.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
cuboot-taishan.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cuboot-warp.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cuboot-yosemite.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
cuboot.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
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: Fix a typo in partial_decompress() comment 2021-05-17 15:27:16 +10:00
devtree.c powerpc/boot: Fixup device-tree on little endian 2021-06-21 21:16:32 +10:00
div64.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
dummy.c
ebony.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
elf_util.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
ep8248e.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
gamecube.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
hack-coff.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
holly.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
install.sh powerpc: make the install target not depend on any build artifact 2021-08-04 10:53:38 +10:00
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 libfdt: define INT32_MAX and UINT32_MAX in libfdt_env.h 2019-11-26 13:35:25 -07:00
libfdt-wrapper.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 161 2019-05-30 11:26:38 -07:00
main.c powerpc/boot: Use address-of operator on section symbols 2020-06-30 14:38:00 +10:00
Makefile powerpc/boot: Build wrapper for an appropriate CPU 2022-04-27 13:03:16 +10:00
microwatt.c powerpc/boot: Add a boot wrapper for Microwatt 2021-06-21 21:16:32 +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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
mvme7100.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ns16550.c powerpc/boot: Fixup device-tree on little endian 2021-06-21 21:16:32 +10:00
of.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
oflib.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
opal-calls.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
opal.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ops.h powerpc/boot: remove unused function find_node_by_linuxphandle() 2022-04-26 13:17:00 +10:00
page.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
planetcore.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ppcboot-hotfoot.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
ppcboot.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
pq2.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 167 2019-05-30 11:26:39 -07:00
ps3-hvcall.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 167 2019-05-30 11:26:39 -07:00
ps3.c powerpc/ps3: Drop unused DBG macro 2020-11-19 14:50:14 +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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
redboot-83xx.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
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: Use CONFIG_PPC_POWERNV to compile OPAL support 2021-10-13 16:45:12 +11:00
simple_alloc.c
simpleboot.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
stdbool.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
stdint.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
stdio.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
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 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
treeboot-bamboo.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 441 2019-06-05 17:37:17 +02:00
treeboot-currituck.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
treeboot-ebony.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
treeboot-iss4xx.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
types.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
ugecon.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
ugecon.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
util.S powerpc/boot: Make use of REL16 relocs in powerpc/boot/util.S 2020-12-04 01:00:44 +11:00
wii-head.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
wii.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
wrapper powerpc/boot: Set LC_ALL=C in wrapper script 2021-10-27 22:31:22 +11:00
xz_config.h powerpc/boot: add {get, put}_unaligned_be32 to xz_config.h 2019-07-10 13:20:44 +10:00
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 powerpc/toc: Future proof kernel toc 2021-12-23 22:35:01 +11:00
zImage.ps3.lds.S powerpc/ps3: Re-align DTB in image 2021-06-10 21:44:57 +10:00

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