Linux-m68k Archive on lore.kernel.org
 help / color / Atom feed
From: Michael Schmitz <schmitzmic@gmail.com>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,
	linux-m68k <linux-m68k@lists.linux-m68k.org>,
	Debian m68k <debian-68k@lists.debian.org>,
	Helge Deller <deller@gmx.de>
Subject: Re: Seccomp support for linux-m68k
Date: Mon, 27 Jul 2020 09:02:03 +1200
Message-ID: <460261ab-8c10-d625-a4e4-a4e755413018@gmail.com> (raw)
In-Reply-To: <87wo2q5yhx.fsf@igel.home>

Hi Andreas,

On 26/07/20 11:03 PM, Andreas Schwab wrote:
> On Jul 26 2020, Michael Schmitz wrote:
>
>> No particular reason - I had seen testb used in the syscall entry code and
> Where?  That may be bugs.

Here:

ENTRY(ret_from_signal)
         movel   %curptr@(TASK_STACK),%a1
         tstb    %a1@(TINFO_FLAGS+2)
         jge     1f
         jbsr    syscall_trace_leave
1:      RESTORE_SWITCH_STACK
         addql   #4,%sp
....

and here:

ENTRY(system_call)
         SAVE_ALL_SYS

         GET_CURRENT(%d1)
         movel   %d1,%a1

         | save top of frame
         movel   %sp,%curptr@(TASK_THREAD+THREAD_ESP0)

         | syscall trace?
         tstb    %a1@(TINFO_FLAGS+2)
         jmi     do_trace_entry
         cmpl    #NR_syscalls,%d0
         jcc     badsys

....

plus when saving the FPU context on resume (the comment there suggests 
FPUs keep 8 bits of status that must be tested, so that should be OK).

Cheers,

     Michael

>
> Andreas.
>

  reply index

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-03-20  8:46 John Paul Adrian Glaubitz
2020-03-20 22:49 ` Finn Thain
2020-03-20 22:59   ` John Paul Adrian Glaubitz
2020-03-20 23:08     ` Finn Thain
2020-03-21 22:18     ` Michael Schmitz
2020-03-21 22:48       ` John Paul Adrian Glaubitz
2020-03-21 23:01         ` John Paul Adrian Glaubitz
2020-07-21 15:13 ` John Paul Adrian Glaubitz
2020-07-25  9:29   ` Michael Schmitz
2020-07-25 11:55     ` Andreas Schwab
2020-07-26  1:23       ` Michael Schmitz
2020-07-26 11:03         ` Andreas Schwab
2020-07-26 21:02           ` Michael Schmitz [this message]
2020-07-26 21:08             ` Andreas Schwab
2020-07-26 21:39               ` Michael Schmitz
2020-07-27  6:35                 ` Andreas Schwab
2020-07-25 18:54     ` John Paul Adrian Glaubitz
2020-07-26  1:34       ` Michael Schmitz
2020-07-26  7:13         ` Michael Schmitz
2020-07-26 11:05         ` Andreas Schwab
2020-07-26 20:46           ` Michael Schmitz
2020-07-26 21:10             ` Andreas Schwab
2020-07-26 22:40               ` Michael Schmitz
2020-07-25 22:48     ` John Paul Adrian Glaubitz

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=460261ab-8c10-d625-a4e4-a4e755413018@gmail.com \
    --to=schmitzmic@gmail.com \
    --cc=debian-68k@lists.debian.org \
    --cc=deller@gmx.de \
    --cc=glaubitz@physik.fu-berlin.de \
    --cc=linux-m68k@lists.linux-m68k.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-m68k Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-m68k/0 linux-m68k/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-m68k linux-m68k/ https://lore.kernel.org/linux-m68k \
		linux-m68k@vger.kernel.org linux-m68k@lists.linux-m68k.org
	public-inbox-index linux-m68k

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-m68k


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