From: Andries Brouwer <aebr@win.tue.nl>
To: Pavel Machek <pavel@ucw.cz>
Cc: Alex LIU <alex.liu@st.com>, linux-kernel@vger.kernel.org
Subject: Re: The purpose of PT_TRACESYSGOOD
Date: Tue, 11 Jan 2005 03:30:03 +0100 [thread overview]
Message-ID: <20050111023003.GA2760@pclin040.win.tue.nl> (raw)
In-Reply-To: <20050110202427.GA1358@elf.ucw.cz>
>> What's the effect of PT_TRACESYSGOOD flag? I found it's used only set
>> in ptrace_setoptions, which is called in the function
>> ptrace_request. And the PT_TRACESYSGOOD flag will be requested in
>> do_syscall_trace. What's the purpose of that flag?
/*
* A child stopped at a syscall has status as if it received SIGTRAP.
* In order to distinguish between SIGTRAP and syscall, some kernel
* versions have the PTRACE_O_TRACESYSGOOD option, that sets an extra
* bit 0x80 in the syscall case.
*/
next prev parent reply other threads:[~2005-01-11 2:30 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-10 3:58 The purpose of PT_TRACESYSGOOD Alex LIU
2005-01-10 20:24 ` Pavel Machek
2005-01-11 2:30 ` Andries Brouwer [this message]
2005-01-11 6:28 ` Alex LIU
2005-01-11 11:10 ` Andries Brouwer
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=20050111023003.GA2760@pclin040.win.tue.nl \
--to=aebr@win.tue.nl \
--cc=alex.liu@st.com \
--cc=linux-kernel@vger.kernel.org \
--cc=pavel@ucw.cz \
/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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).