From: Florian Weimer <fweimer@redhat.com>
To: Ilya Leoshkevich <iii@linux.ibm.com>, libc-alpha@sourceware.org
Cc: stli@linux.ibm.com
Subject: Re: [PATCH 00/12] S390: Implement __fentry__
Date: Thu, 02 Aug 2018 09:17:00 -0000 [thread overview]
Message-ID: <ed187d53-0221-55ab-07a8-161302fd89c0@redhat.com> (raw)
In-Reply-To: <20180802075735.3457-1-iii@linux.ibm.com>
On 08/02/2018 09:57 AM, Ilya Leoshkevich wrote:
> This patch series adds the runtime support in glibc for the -mfentry
> gcc feature introduced in [1] and [2].
>
> Patches 1-9 deal with avoiding clobbering %r0 when calling lazily bound
> functions, so that the new __fentry__ symbol could be called with return
> address in that register.
Should GCC arrange for suitable ABI markup if -mfentry is used? I'm
worried that unexpected clobbers of r0 could be quite difficult to
figure out otherwise.
Thanks,
Florian
next prev parent reply other threads:[~2018-08-02 9:17 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-02 7:58 Ilya Leoshkevich
2018-08-02 7:58 ` [PATCH 03/12] S390: Use symbolic offsets for stack variables in 64-bit _dl_runtime_resolve Ilya Leoshkevich
2018-08-02 7:58 ` [PATCH 01/12] S390: Use symbolic offsets for stack variables in 32-bit _dl_runtime_resolve Ilya Leoshkevich
2018-08-02 7:58 ` [PATCH 02/12] S390: Use symbolic offsets for stack variables in 32-bit _dl_runtime_profile Ilya Leoshkevich
2018-08-02 7:59 ` [PATCH 05/12] S390: Do not clobber R0 in 32-bit _dl_runtime_resolve Ilya Leoshkevich
2018-08-02 7:59 ` [PATCH 08/12] S390: Do not clobber R0 in 64-bit _dl_runtime_profile Ilya Leoshkevich
2018-08-02 7:59 ` [PATCH 11/12] S390: Implement 64-bit __fentry__ Ilya Leoshkevich
2018-08-02 7:59 ` [PATCH 09/12] S390: Test that lazy binding does not clobber R0 Ilya Leoshkevich
2018-08-02 7:59 ` [PATCH 07/12] S390: Do not clobber R0 in 64-bit _dl_runtime_resolve Ilya Leoshkevich
2018-08-02 7:59 ` [PATCH 12/12] S390: Fix unwind in 32-bit _mcount Ilya Leoshkevich
2018-08-02 8:10 ` [PATCH 10/12] Move __fentry__ version definition to sysdeps/{i386,x86_64} Ilya Leoshkevich
2018-08-02 8:41 ` [PATCH 06/12] S390: Do not clobber R0 in 32-bit _dl_runtime_profile Ilya Leoshkevich
2018-08-02 9:00 ` [PATCH 04/12] S390: Use symbolic offsets for stack variables in 64-bit _dl_runtime_profile Ilya Leoshkevich
2018-08-02 9:17 ` Florian Weimer [this message]
2018-08-02 10:43 ` [PATCH 00/12] S390: Implement __fentry__ Ilya Leoshkevich
2018-08-02 18:32 ` Florian Weimer
2018-08-07 8:27 ` Stefan Liebler
2018-08-10 7:15 ` [COMMITTED] " Stefan Liebler
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