[Bug target/98784] [8/9/10/11 Regression] sparcv8 regression

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From: "romain.naour at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/98784] [8/9/10/11 Regression] sparcv8 regression
Date: Sat, 23 Jan 2021 20:07:59 +0000	[thread overview]
Message-ID: <bug-98784-4-lNTgS6Bx08@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-98784-4@http.gcc.gnu.org/bugzilla/>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98784

--- Comment #6 from Romain Naour <romain.naour at gmail dot com> ---
Hello,

Thanks for the help,

The previous gcc command line was from the busybox build (without -fPIC) but
this is not busybox that crash... this is the libc.

See how the libc (uClibc) was built:

output/host/bin/sparc-buildroot-linux-uclibc-gcc -c libc/stdlib/atoll.c -o
libc/stdlib/atoll.os -Wall -Wstrict-prototypes -Wstrict-aliasing
-Wno-nonnull-compare -funsigned-char -fno-builtin -fcommon -fno-asm
-fmerge-all-constants -std=gnu99 -mcpu=v8 -fno-stack-protector -nostdinc
-I./include -I./include -include libc-symbols.h -I./libc/sysdeps/linux/sparc
-I./libc/sysdeps/linux -I./ldso/ldso/sparc -I./ldso/include -I. -Os
-fstrict-aliasing -D__USE_STDIO_FUTEXES__ -DHAVE_FORCED_UNWIND
-D_LIBC_REENTRANT -I./libpthread/nptl -I./libpthread/nptl
-I./libpthread/nptl/sysdeps/unix/sysv/linux/sparc
-I./libpthread/nptl/sysdeps/sparc -I./libpthread/nptl/sysdeps/sparc
-I./libpthread/nptl/sysdeps/unix/sysv/linux
-I./libpthread/nptl/sysdeps/unix/sysv/linux -I./libpthread/nptl/sysdeps/pthread
-I./libpthread/nptl/sysdeps/pthread/bits -I./libpthread/nptl/sysdeps/generic
-I./libc/sysdeps/linux/common -isystem
output/host/lib/gcc/sparc-buildroot-linux-uclibc/10.2.0/include-fixed -isystem
output/host/lib/gcc/sparc-buildroot-linux-uclibc/10.2.0/include
-Ioutput/build/linux-headers-5.4.88/usr/include/ -DNDEBUG -DIN_LIB=libc -fPIC
-MT libc/stdlib/atoll.os -MD -MP -MF libc/stdlib/.atoll.os.dep

Indeed we have "-fPIC"

The system boot correctly if I replace the libc library with a working one.

I'm not familiar with gcc internals but I tried to remove "!optimize" from the
if clauses [1] :

"if (!flag_pic || !crtl->uses_pic_offset_table)"

It seems to work (ok probably not the correct fix).
Is the issue related to the optimization level (Os vs O1) ?

[1]
https://gcc.gnu.org/git/?p=gcc.git;a=blob;f=gcc/config/sparc/sparc.c;h=aefced85fe142885b1b31fa878a0ff0dfd4e921a;hb=ee5c3db6c5b2c3332912fb4c9cfa2864569ebd9a#l13097

next prev parent reply	other threads:[~2021-01-23 20:07 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-21 22:13 [Bug c/98784] New: [gcc 8.4/9.3/10] " romain.naour at gmail dot com
2021-01-21 23:01 ` [Bug c/98784] " ebotcazou at gcc dot gnu.org
2021-01-21 23:26 ` romain.naour at gmail dot com
2021-01-21 23:43 ` ebotcazou at gcc dot gnu.org
2021-01-22  7:33 ` [Bug target/98784] [8/9/10/11 Regression] " rguenth at gcc dot gnu.org
2021-01-23 11:43 ` romain.naour at gmail dot com
2021-01-23 17:33 ` ebotcazou at gcc dot gnu.org
2021-01-23 20:07 ` romain.naour at gmail dot com [this message]
2021-01-23 21:56 ` [Bug target/98784] [8/9/10/11 Regression] problematic build of uClibc with -fPIC ebotcazou at gcc dot gnu.org
2021-01-24  9:17 ` ebotcazou at gcc dot gnu.org
2021-01-26 21:24 ` romain.naour at gmail dot com
2021-01-26 22:29 ` romain.naour at gmail dot com
2021-04-09  8:08 ` rguenth at gcc dot gnu.org
2021-05-14  9:54 ` [Bug target/98784] [9/10/11/12 " jakub at gcc dot gnu.org
2021-06-01  8:19 ` rguenth at gcc dot gnu.org
2021-06-28 16:40 ` yann at sionneau dot net
2021-06-28 16:50 ` yann at sionneau dot net
2022-05-27  9:44 ` [Bug target/98784] [10/11/12/13 " rguenth at gcc dot gnu.org
2022-06-28 10:43 ` jakub at gcc dot gnu.org
2023-07-07 10:38 ` [Bug target/98784] [11/12/13/14 " rguenth at gcc dot gnu.org
2023-08-08  9:51 ` wbx at openadk dot org
2024-04-30 15:05 ` [Bug target/98784] [11/12/13/14/15 " dm.chestnykh at gmail dot com
2024-04-30 17:55 ` dm.chestnykh at gmail dot com
2024-04-30 17:59 ` pinskia at gcc dot gnu.org

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