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 [thread overview]
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.
>
next prev parent reply other threads:[~2020-07-26 21:02 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-20 8:46 Seccomp support for linux-m68k 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
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