Linux SNPS ARC Archive on lore.kernel.org
 help / color / Atom feed
From: Vineet Gupta <Vineet.Gupta1@synopsys.com>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: "linux-snps-arc@lists.infradead.org"
	<linux-snps-arc@lists.infradead.org>,
	"libc-alpha @ sourceware . org" <libc-alpha@sourceware.org>,
	Joseph Myers <joseph@codesourcery.com>
Subject: Re: __syscall_error (was Re: [PATCH v4 13/15] ARC: Build Infrastructure)
Date: Wed, 1 Apr 2020 21:38:35 +0000
Message-ID: <d96bf3d3-5cf0-e68e-c1f3-3ceb5286fb9d@synopsys.com> (raw)
In-Reply-To: <874ku3zlg3.fsf@igel.home>

On 4/1/20 12:58 AM, Andreas Schwab wrote:
> On Apr 01 2020, Vineet Gupta via Libc-alpha wrote:
> 
>> Looking as RISCV code, they opencode __syscall_error for !IS_IN (libc) which I was
>> hoping to avoid.
> 
> But that is the right way to do it.  The syscall error handler must be
> local to the library, it cannot afford to go through the PLT to call a
> function in a different library here.

Still, It needs to fetch (and runtime prepare) the GOT entry anyways.

The real point however is having the call avoids having to know/write asm code
with the errno codegen ABI for TLS model etc

Well its no big deal either way, not these days anyways (Given the ARC embedded
background, I've histrionically been more sensitive to code size, but that
boundary seems to be getting hazy/moot-point anyways...)
_______________________________________________
linux-snps-arc mailing list
linux-snps-arc@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-snps-arc

  reply index

Thread overview: 63+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-13  3:04 [PATCH v4 00/15] glibc port to ARC processors Vineet Gupta
2020-03-13  3:04 ` [PATCH v4 01/15] ARC: add definitions to elf/elf.h Vineet Gupta
2020-03-26  1:37   ` Joseph Myers
2020-03-26  1:52     ` Vineet Gupta
2020-03-13  3:04 ` [PATCH v4 02/15] ARC: ABI Implementation Vineet Gupta
2020-03-26  1:52   ` Joseph Myers
2020-03-26  2:39     ` Vineet Gupta
2020-03-26 18:48       ` Joseph Myers
2020-03-27  0:37         ` Vineet Gupta
2020-03-27 23:33         ` Vineet Gupta
2020-03-27 23:35           ` Joseph Myers
2020-03-27 23:47             ` Vineet Gupta
2020-03-31 21:08         ` Big Endian support as multi-ABI (was Re: [PATCH v4 02/15] ARC: ABI Implementation) Vineet Gupta
2020-03-31 21:27           ` Joseph Myers
2020-03-31 21:35             ` Vineet Gupta
2020-03-13  3:04 ` [PATCH v4 03/15] ARC: startup and dynamic linking code Vineet Gupta
2020-03-26  1:55   ` Joseph Myers
2020-03-26  2:45     ` Vineet Gupta
2020-03-13  3:04 ` [PATCH v4 04/15] ARC: Thread Local Storage support Vineet Gupta
2020-03-26  1:57   ` Joseph Myers
2020-03-26  2:47     ` Vineet Gupta
2020-03-13  3:04 ` [PATCH v4 05/15] ARC: Atomics and Locking primitives Vineet Gupta
2020-03-13  3:04 ` [PATCH v4 06/15] ARC: math soft float support Vineet Gupta
2020-03-26  1:59   ` Joseph Myers
2020-03-26  2:48     ` Vineet Gupta
2020-03-13  3:04 ` [PATCH v4 07/15] ARC: hardware floating point support Vineet Gupta
2020-03-26  2:06   ` Joseph Myers
2020-03-26  3:19     ` Vineet Gupta
2020-03-26 23:22   ` Joseph Myers
2020-03-27  1:50     ` Vineet Gupta
2020-03-27 18:37       ` Joseph Myers
2020-03-27 18:53         ` Vineet Gupta
2020-03-13  3:04 ` [PATCH v4 08/15] ARC: Linux Syscall Interface Vineet Gupta
2020-03-26 23:52   ` Joseph Myers
2020-03-27  4:34     ` Vineet Gupta
2020-03-27 18:38       ` Joseph Myers
2020-03-13  3:04 ` [PATCH v4 09/15] ARC: Linux ABI Vineet Gupta
2020-03-27  0:38   ` Joseph Myers
2020-03-27  4:45     ` Vineet Gupta
2020-03-13  3:04 ` [PATCH v4 10/15] ARC: Linux Startup and Dynamic Loading Vineet Gupta
2020-03-13  3:04 ` [PATCH v4 11/15] ARC: ABI lists Vineet Gupta
2020-03-27  0:40   ` Joseph Myers
2020-03-27  4:36     ` Vineet Gupta
2020-03-27 18:39       ` Joseph Myers
2020-03-27 19:09         ` Vineet Gupta
2020-03-13  3:04 ` [PATCH v4 12/15] ARC: Update syscall-names.list for ARC specific syscalls Vineet Gupta
2020-03-13  3:04 ` [PATCH v4 13/15] ARC: Build Infrastructure Vineet Gupta
2020-03-27 22:47   ` Joseph Myers
2020-03-28  6:42     ` Vineet Gupta
2020-03-31 22:02       ` Vineet Gupta
2020-03-31 22:48         ` Joseph Myers
2020-04-01  0:44           ` __syscall_error (was Re: [PATCH v4 13/15] ARC: Build Infrastructure) Vineet Gupta
2020-04-01  7:58             ` Andreas Schwab
2020-04-01 21:38               ` Vineet Gupta [this message]
2020-04-01 17:06             ` Joseph Myers
2020-04-02  0:00               ` Vineet Gupta
2020-04-02  8:50               ` Florian Weimer
2020-04-02 20:22                 ` Vineet Gupta
2020-03-13  3:04 ` [PATCH v4 14/15] build-many-glibcs.py: Enable ARC builds Vineet Gupta
2020-03-13  3:04 ` [PATCH v4 15/15] Documentation for ARC port Vineet Gupta
2020-03-27 22:49   ` Joseph Myers
2020-03-27 23:56     ` Vineet Gupta
2020-03-28  0:01       ` Joseph Myers

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=d96bf3d3-5cf0-e68e-c1f3-3ceb5286fb9d@synopsys.com \
    --to=vineet.gupta1@synopsys.com \
    --cc=joseph@codesourcery.com \
    --cc=libc-alpha@sourceware.org \
    --cc=linux-snps-arc@lists.infradead.org \
    --cc=schwab@linux-m68k.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux SNPS ARC Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-snps-arc/0 linux-snps-arc/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-snps-arc linux-snps-arc/ https://lore.kernel.org/linux-snps-arc \
		linux-snps-arc@lists.infradead.org
	public-inbox-index linux-snps-arc

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.infradead.lists.linux-snps-arc


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git