linux-kernel - Re: [build fail] v6.11-rc2 from "ARM: 9404/1: arm32: enable HAVE_LD_DEAD_CODE_DATA

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Message-ID: <c11ba413-89f6-46b4-8d59-96306c9f1f14@huawei.com>
Date: Wed, 7 Aug 2024 17:49:52 +0800
From: "liuyuntao (F)" <liuyuntao12@...wei.com>
To: Harith George <mail2hgg@...il.com>, <arnd@...db.de>,
	<linus.walleij@...aro.org>, <rmk+kernel@...linux.org.uk>, <ardb@...nel.org>,
	<harith.g@...fsemi.com>
CC: <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [build fail] v6.11-rc2 from "ARM: 9404/1: arm32: enable
 HAVE_LD_DEAD_CODE_DATA_ELIMINATION"

It seems to be ok with vexpress_defconfig in mainline tree v6.11-rc2,
I may need your .config/code file for further testing.

On 2024/8/7 13:12, Harith George wrote:
> Hi,
> 
> I am seeing a regression in "make xipImage" builds in mainline tree 
> v6.11-rc2  with LD segmentation fault.
> 
> $ make V=1 xipImage
> ...
> + arm-poky-linux-musleabi-ld -EL -z noexecstack --no-undefined -X 
> --pic-veneer -z norelro --build-id=sha1 --orphan-handling=warn 
> --script=./arch/arm/kernel/vmlinux.lds -o vmlinux --whole-archive 
> vmlinux.a init/version-timestamp.o --no-whole-archive --start-group 
> arch/arm/lib/lib.a lib/lib.a --end-group
> scripts/link-vmlinux.sh: line 49: 3371164 Segmentation fault      (core 
> dumped) ${ld} ${ldflags} -o ${output} ${wl}--whole-archive ${objs} 
> ${wl}--no-whole-archive ${wl}--start-group ${libs} ${wl}--end-group 
> ${kallsymso} ${btf_vmlinux_bin_o} ${ldlibs}
> make[2]: *** [scripts/Makefile.vmlinux:34: vmlinux] Error 139
> make[2]: *** Deleting file 'vmlinux'
> make[1]: *** [/home/amol/hgg/mainline/linux/Makefile:1156: vmlinux] Error 2
> make: *** [Makefile:224: __sub-make] Error 2
> 
> git bisect pointed to ed0f941022515ff40473("ARM: 9404/1: arm32: enable 
> HAVE_LD_DEAD_CODE_DATA_ELIMINATION")
> 
> "CONFIG_HAVE_LD_DEAD_CODE_DATA_ELIMINATION=y" is getting set with the 
> commit in my .config.
> But, my .config is _not_ enabling the "LD_DEAD_CODE_DATA_ELIMINATION" flag.
> 
> Reverting commit ed0f94102251, resolves the linking fail.
> Infact, reverting just the ".reloc  .text, R_ARM_NONE, ." additions in 
> arch/arm/kernel/entry-armv.S resolves the linking fail.
> 
> My toolchain is
> arm-poky-linux-musleabi-gcc (GCC) 9.2.0
> GNU ld (GNU Binutils) 2.32.0.20190204
> 
> I am working on a new platform. Hence my .config/code has other platform 
> related additions which would not make sense on current mainline, which 
> is why I have not added it here. Do let me know if you would still like 
> to have the .config file.
> 
> 
> Thanks,
> Warm Regards,
> Harith
> 
> 
>