From: Mao Han <han_mao@c-sky.com>
To: "H.J. Lu" <hjl.tools@gmail.com>
Cc: c-sky_gcc_upstream@c-sky.com, gnu-csky@mentor.com,
libc-alpha@sourceware.org
Subject: Re: [PATCH v4 01/13] C-SKY: ABI related code
Date: Wed, 12 Sep 2018 07:07:00 -0000 [thread overview]
Message-ID: <20180912070735.GA3771@vmh-VirtualBox> (raw)
In-Reply-To: <CAMe9rOq1aukA=Df8Qx1kUpQ5DB7U0E6+HHWrpQNV3_UpgKvbtQ@mail.gmail.com>
On Tue, Sep 11, 2018 at 09:15:19PM -0700, H.J. Lu wrote:
> On Tue, Sep 11, 2018 at 7:56 PM, Mao Han <han_mao@c-sky.com> wrote:
> > Codes in this patch contains lots of C-SKY ABI related code. They are
> > written accroding to the registers assgnments, relocations, assemblly
> > described in C-SKY CPU ABI Standards and C-SKY architercure user guide.
> >
> > diff --git a/sysdeps/csky/abiv2/crti.S b/sysdeps/csky/abiv2/crti.S
> > new file mode 100644
> > index 0000000..4526a9e
> > --- /dev/null
> > +++ b/sysdeps/csky/abiv2/crti.S
> > @@ -0,0 +1,99 @@
> > +/* Special .init and .fini section support for C-SKY ABIV2.
> > + Copyright (C) 2018 Free Software Foundation, Inc.
> > + This file is part of the GNU C Library.
> > +
> > + The GNU C Library is free software; you can redistribute it and/or
> > + modify it under the terms of the GNU Lesser General Public
> > + License as published by the Free Software Foundation; either
> > + version 2.1 of the License, or (at your option) any later version.
> > +
> > + In addition to the permissions in the GNU Lesser General Public
> > + License, the Free Software Foundation gives you unlimited
> > + permission to link the compiled version of this file with other
> > + programs, and to distribute those programs without any restriction
> > + coming from the use of this file. (The GNU Lesser General Public
> > + License restrictions do apply in other respects; for example, they
> > + cover modification of the file, and distribution when not linked
> > + into another program.)
> > +
> > + Note that people who make modified versions of this file are not
> > + obligated to grant this special exception for their modified
> > + versions; it is their choice whether to do so. The GNU Lesser
> > + General Public License gives permission to release a modified
> > + version without this exception; this exception also makes it
> > + possible to release a modified version which carries forward this
> > + exception.
> > +
> > + The GNU C Library is distributed in the hope that it will be useful,
> > + but WITHOUT ANY WARRANTY; without even the implied warranty of
> > + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> > + Lesser General Public License for more details.
> > +
> > + You should have received a copy of the GNU Lesser General Public
> > + License along with the GNU C Library. If not, see
> > + <http://www.gnu.org/licenses/>. */
> > +
> > +/* crti.S puts a function prologue at the beginning of the .init and
> > + .fini sections and defines global symbols for those addresses, so
> > + they can be called as functions. The symbols _init and _fini are
> > + magic and cause the linker to emit DT_INIT and DT_FINI. */
> > +
> > +#include <libc-symbols.h>
> > +#include <sysdep.h>
> > +
> > +#ifndef PREINIT_FUNCTION
> > +# define PREINIT_FUNCTION __gmon_start__
> > +#endif
> > +
> > +#ifndef PREINIT_FUNCTION_WEAK
> > +# define PREINIT_FUNCTION_WEAK 1
> > +#endif
> > +
> > +#if PREINIT_FUNCTION_WEAK
> > + weak_extern (PREINIT_FUNCTION)
> > +#else
> > + .hidden PREINIT_FUNCTION
> > +#endif
> > +
> > + .section .init,"ax",@progbits
> > + .align 4
> > + .globl _init
> > + .hidden _init
>
> Does C-SKY really need _init and _fini?
>
>
> --
> H.J.
It seems used to call some pre-init function for libc, register transactional
memory clone tables and invoke global constructors on C-SKY. Althrough I
haven't found any constructors call by _init, I just tend to have _init and
_fini as most other arch have these.
Han Mao
next prev parent reply other threads:[~2018-09-12 7:07 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-09-12 2:56 [PATCH v4 00/13] port C-SKY to glibc Mao Han
[not found] ` <cover.1536720821.git.han_mao@c-sky.com>
2018-09-12 2:56 ` [PATCH v4 01/13] C-SKY: ABI related code Mao Han
2018-09-12 4:16 ` H.J. Lu
2018-09-12 7:07 ` Mao Han [this message]
2018-09-12 8:23 ` Florian Weimer
2018-09-12 9:06 ` Mao Han
2018-09-29 1:46 ` Palmer Dabbelt
2018-09-30 9:04 ` Manuel A. Fernandez Montecelo
2018-10-01 8:18 ` Richard W.M. Jones
2018-09-17 21:46 ` Joseph Myers
2018-09-18 6:09 ` Mao Han
2018-09-12 2:56 ` [PATCH v4 05/13] C-SKY: Linux Syscall Interface Mao Han
2018-09-12 2:56 ` [PATCH v4 02/13] C-SKY: TLS support Mao Han
2018-09-12 2:56 ` [PATCH v4 03/13] C-SKY: Math support Mao Han
2018-09-17 21:49 ` Joseph Myers
2018-09-18 6:05 ` Mao Han
2018-09-12 2:57 ` [PATCH v4 13/13] C-SKY: Skeleton documentation Mao Han
2018-09-12 2:57 ` [PATCH v4 06/13] C-SKY: Linux ABI Mao Han
2018-09-12 13:40 ` Arnd Bergmann
2018-09-12 14:21 ` Joseph Myers
2018-09-12 15:34 ` Arnd Bergmann
2018-09-12 21:28 ` struct elf_prstatus and Y2038 (was: Re: [PATCH v4 06/13] C-SKY: Linux ABI) Florian Weimer
2018-09-13 10:48 ` Arnd Bergmann
2018-09-13 10:56 ` struct elf_prstatus and Y2038 Florian Weimer
2018-09-13 8:17 ` [PATCH v4 06/13] C-SKY: Linux ABI Mao Han
2018-09-13 8:46 ` Arnd Bergmann
2018-09-13 15:32 ` [gnu-csky] " Joseph Myers
2018-09-13 16:35 ` Joseph Myers
2018-09-13 20:47 ` Arnd Bergmann
2018-09-13 20:59 ` Joseph Myers
2018-09-13 21:32 ` Arnd Bergmann
2018-09-13 22:57 ` Joseph Myers
2018-09-13 20:31 ` Arnd Bergmann
2018-09-13 20:49 ` Joseph Myers
2018-09-13 21:38 ` Arnd Bergmann
2018-09-12 2:57 ` [PATCH v4 08/13] C-SKY: Linux Startup and Dynamic Loading Code Mao Han
2018-09-12 2:57 ` [PATCH v4 12/13] C-SKY: Add build-many-glibcs.py support Mao Han
2018-09-12 2:57 ` [PATCH v4 11/13] C-SKY: Add ABI definitions in config.h.in Mao Han
2018-09-12 2:57 ` [PATCH v4 09/13] C-SKY: Add dynamic relocations to elf.h Mao Han
2018-09-12 3:05 ` [PATCH v4 04/13] C-SKY: NPTL support and Atomic Mao Han
2018-09-12 3:05 ` [PATCH v4 07/13] C-SKY: ABI Lists Mao Han
2018-09-12 6:51 ` Andreas Schwab
2018-09-12 7:12 ` Mao Han
2018-09-12 12:35 ` Joseph Myers
2018-09-12 13:46 ` Andreas Schwab
2018-09-12 15:19 ` Joseph Myers
2018-09-13 8:23 ` Mao Han
2018-09-12 3:05 ` [PATCH v4 10/13] C-SKY: Build Infastructure Mao Han
2018-09-17 21:52 ` Joseph Myers
2018-09-18 6:02 ` Mao Han
2018-09-12 3:05 ` [PATCH 1/1] Update config.guess and config.sub to current versions Mao Han
2018-09-12 12:31 ` [PATCH v4 00/13] port C-SKY to glibc Joseph Myers
2018-09-13 8:14 ` Mao Han
2018-09-13 12:36 ` Joseph Myers
2018-09-18 6:22 ` Mao Han
2018-09-18 7:18 ` Mao Han
2018-09-18 11:43 ` Joseph Myers
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