From: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
To: Fangrui Song <maskray@google.com>,
Adhemerval Zanella <adhemerval.zanella@linaro.org>
Cc: libc-alpha@sourceware.org
Subject: Re: [PATCH 0/3] Improve lld support and current status
Date: Wed, 27 Oct 2021 19:39:15 -0300 [thread overview]
Message-ID: <87lf2ejdnw.fsf@linux.ibm.com> (raw)
In-Reply-To: <20211026203327.6b2o5k4cmkuzzm6j@google.com>
Fangrui Song via Libc-alpha <libc-alpha@sourceware.org> writes:
> On 2021-10-26, Adhemerval Zanella wrote:
>>The powerpc64le fails at libc.so start:
>>
>> (gdb) bt
>> #0 0x00007ffff7f2a980 in __gep_setup___vmx__sigjmp_save ()
>> from
>> /home/azanella/glibc/build/powerpc64le-linux-gnu-power9-lld/libc.so.6
>> #1 0x00007ffff7d7ac5c in __libc_start_call_main ()
>> from
>> /home/azanella/glibc/build/powerpc64le-linux-gnu-power9-lld/libc.so.6
This is a local call from libc.so to libc.so.
It should be using the local entry point for __vmx__sigjmp_save.
>> #2 0x00007ffff7d7ae90 in __libc_start_main_impl ()
>> from
>> /home/azanella/glibc/build/powerpc64le-linux-gnu-power9-lld/libc.so.6
>> #3 0x0000000000000000 in ?? ()
>> (gdb) disas
>> Dump of assembler code for function __gep_setup___vmx__sigjmp_save:
>> => 0x00007ffff7f2a980 <+0>: .long 0x613ffe6
>> 0x00007ffff7f2a984 <+4>: li r12,-1280
This is a pla, but this GDB isn't able to disassemble it. This instruction
shouldn't be used unless when configuring glibc using --with-cpu=power10.
>>And powerpc64-linux-gnu fails on dynamic loaders start:
>>
>> (gdb) bt
>> #0 0x00007ffff7ffa9a8 in _start ()
>> (gdb) disas
>> Dump of assembler code for function _start:
>> => 0x00007ffff7ffa9a8 <+0>: .long 0x0
>> 0x00007ffff7ffa9ac <+4>: .long 0x0
>> 0x00007ffff7ffa9b0 <+8>: .long 0x0
>> 0x00007ffff7ffa9b4 <+12>: .long 0x0
I've been told that LLD doesn't support the powerpc ELFv1 yet.
> CCed the powerpc maintainer.
Thanks!
--
Tulio Magno
next prev parent reply other threads:[~2021-10-27 22:39 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-26 20:03 Adhemerval Zanella
2021-10-26 20:03 ` [PATCH 1/3] elf: Disable ifuncmain{1,5,5pic,5pie} when using LLD Adhemerval Zanella
2021-10-29 19:49 ` Fangrui Song
2021-10-26 20:03 ` [PATCH 2/3] Fix LIBC_PROG_BINUTILS for -fuse-ld=lld Adhemerval Zanella
2021-10-26 20:48 ` Fangrui Song
2021-10-27 11:42 ` Adhemerval Zanella
2021-10-26 20:03 ` [PATCH 3/3] Check if linker also support -mtls-dialect=gnu2 Adhemerval Zanella
2021-10-27 2:04 ` Fāng-ruì Sòng
2021-10-29 0:56 ` Fāng-ruì Sòng
2021-10-26 20:33 ` [PATCH 0/3] Improve lld support and current status Fangrui Song
2021-10-27 13:11 ` Adhemerval Zanella
2021-10-28 1:06 ` Fangrui Song
2021-10-28 1:18 ` Fangrui Song
2021-10-28 17:40 ` Adhemerval Zanella
2021-10-28 11:48 ` Adhemerval Zanella
2021-10-27 22:39 ` Tulio Magno Quites Machado Filho [this message]
2021-10-27 22:50 ` Tulio Magno Quites Machado Filho
2021-11-05 7:23 ` lld status with powerpc64 Fangrui Song
2021-11-05 7:45 ` Fangrui Song
2021-11-05 13:58 ` Adhemerval Zanella
2021-11-05 19:32 ` Adhemerval Zanella
2021-11-05 19:38 ` H.J. Lu
2021-11-05 19:40 ` H.J. Lu
2021-11-05 19:50 ` Fāng-ruì Sòng
2021-11-07 14:24 ` Bill Schmidt
2021-11-08 11:37 ` Adhemerval Zanella
2021-11-08 13:26 ` Bill Schmidt
2021-11-08 13:54 ` Adhemerval Zanella
2021-11-08 13:59 ` Bill Schmidt
2021-11-08 14:11 ` Adhemerval Zanella
2021-11-08 14:12 ` Bill Schmidt
[not found] ` <OFD215FC7A.323066CE-ON00258787.0051DA95-00258787.00532945@ibm.com>
2021-11-08 22:38 ` Fangrui Song
2021-11-09 12:20 ` Adhemerval Zanella
2021-10-27 23:37 ` [PATCH 0/3] Improve lld support and current status Fangrui Song
2021-10-28 17:27 ` Tulio Magno Quites Machado Filho
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