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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Tom Saeger <tom.saeger@oracle.com>
Cc: Naresh Kamboju <naresh.kamboju@linaro.org>,
	John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
	Rich Felker <dalias@libc.org>,
	Masahiro Yamada <masahiroy@kernel.org>,
	Ard Biesheuvel <ardb@kernel.org>,
	Nathan Chancellor <nathan@kernel.org>,
	Dennis Gilmore <dennis@ausil.us>,
	Palmer Dabbelt <palmer@rivosinc.com>,
	Arnd Bergmann <arnd@arndb.de>,
	stable@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-sh@vger.kernel.org
Subject: Re: [PATCH 5.4 fix build id for arm64 6/6] sh: define RUNTIME_DISCARD_EXIT
Date: Fri, 27 Jan 2023 14:32:40 +0100	[thread overview]
Message-ID: <Y9PSeCYGegZwXxuv@kroah.com> (raw)
In-Reply-To: <20230127132540.agmyuzg64wlcwglo@oracle.com>

On Fri, Jan 27, 2023 at 07:25:40AM -0600, Tom Saeger wrote:
> On Fri, Jan 27, 2023 at 08:29:23AM +0100, Greg Kroah-Hartman wrote:
> > On Tue, Jan 24, 2023 at 02:14:23PM -0700, Tom Saeger wrote:
> > > sh vmlinux fails to link with GNU ld < 2.40 (likely < 2.36) since
> > > commit 99cb0d917ffa ("arch: fix broken BuildID for arm64 and riscv").
> > > 
> > > This is similar to fixes for powerpc and s390:
> > > commit 4b9880dbf3bd ("powerpc/vmlinux.lds: Define RUNTIME_DISCARD_EXIT").
> > > commit a494398bde27 ("s390: define RUNTIME_DISCARD_EXIT to fix link error
> > > with GNU ld < 2.36").
> > > 
> > >   $ sh4-linux-gnu-ld --version | head -n1
> > >   GNU ld (GNU Binutils for Debian) 2.35.2
> > > 
> > >   $ make ARCH=sh CROSS_COMPILE=sh4-linux-gnu- microdev_defconfig
> > >   $ make ARCH=sh CROSS_COMPILE=sh4-linux-gnu-
> > > 
> > >   `.exit.text' referenced in section `__bug_table' of crypto/algboss.o:
> > >   defined in discarded section `.exit.text' of crypto/algboss.o
> > >   `.exit.text' referenced in section `__bug_table' of
> > >   drivers/char/hw_random/core.o: defined in discarded section
> > >   `.exit.text' of drivers/char/hw_random/core.o
> > >   make[2]: *** [scripts/Makefile.vmlinux:34: vmlinux] Error 1
> > >   make[1]: *** [Makefile:1252: vmlinux] Error 2
> > > 
> > > arch/sh/kernel/vmlinux.lds.S keeps EXIT_TEXT:
> > > 
> > > 	/*
> > > 	 * .exit.text is discarded at runtime, not link time, to deal with
> > > 	 * references from __bug_table
> > > 	 */
> > > 	.exit.text : AT(ADDR(.exit.text)) { EXIT_TEXT }
> > > 
> > > However, EXIT_TEXT is thrown away by
> > > DISCARD(include/asm-generic/vmlinux.lds.h) because
> > > sh does not define RUNTIME_DISCARD_EXIT.
> > > 
> > > GNU ld 2.40 does not have this issue and builds fine.
> > > This corresponds with Masahiro's comments in a494398bde27:
> > > "Nathan [Chancellor] also found that binutils
> > > commit 21401fc7bf67 ("Duplicate output sections in scripts") cured this
> > > issue, so we cannot reproduce it with binutils 2.36+, but it is better
> > > to not rely on it."
> > > 
> > > Fixes: 99cb0d917ffa ("arch: fix broken BuildID for arm64 and riscv")
> > > Link: https://lore.kernel.org/all/Y7Jal56f6UBh1abE@dev-arch.thelio-3990X/
> > > Link: https://lore.kernel.org/all/20230123194218.47ssfzhrpnv3xfez@oracle.com/
> > > Signed-off-by: Tom Saeger <tom.saeger@oracle.com>
> > > ---
> > >  arch/sh/kernel/vmlinux.lds.S | 1 +
> > >  1 file changed, 1 insertion(+)
> > 
> > No upstream git id?
> > 
> > :(
> 
> No, not yet.  I'll try resending.


<formletter>

This is not the correct way to submit patches for inclusion in the
stable kernel tree.  Please read:
    https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html
for how to do this properly.

</formletter>

  parent reply	other threads:[~2023-01-27 13:33 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-01-24 21:14 [PATCH 5.4 fix build id for arm64 with CONFIG_MODVERSIONS 0/6] Tom Saeger
2023-01-24 21:14 ` [PATCH 5.4 fix build id for arm64 1/6] x86, vmlinux.lds: Add RUNTIME_DISCARD_EXIT to generic DISCARDS Tom Saeger
2023-01-24 21:14 ` [PATCH 5.4 fix build id for arm64 2/6] arch: fix broken BuildID for arm64 and riscv Tom Saeger
2023-01-24 21:14 ` [PATCH 5.4 fix build id for arm64 3/6] powerpc/vmlinux.lds: Define RUNTIME_DISCARD_EXIT Tom Saeger
2023-01-24 21:14 ` [PATCH 5.4 fix build id for arm64 4/6] powerpc/vmlinux.lds: Don't discard .rela* for relocatable builds Tom Saeger
2023-01-24 21:14 ` [PATCH 5.4 fix build id for arm64 5/6] s390: define RUNTIME_DISCARD_EXIT to fix link error with GNU ld < 2.36 Tom Saeger
2023-01-24 21:14 ` [PATCH 5.4 fix build id for arm64 6/6] sh: define RUNTIME_DISCARD_EXIT Tom Saeger
2023-01-24 21:17   ` kernel test robot
2023-01-27  7:29   ` Greg Kroah-Hartman
2023-01-27 13:25     ` Tom Saeger
2023-01-27 13:29       ` John Paul Adrian Glaubitz
2023-01-27 13:32       ` Greg Kroah-Hartman [this message]
2023-01-27  2:08 ` [PATCH 5.4 fix build id for arm64 with CONFIG_MODVERSIONS 0/6] Sasha Levin
2023-01-27  7:28   ` Greg Kroah-Hartman
2023-01-27 13:40     ` Tom Saeger

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