From: Daniel Jacobowitz <drow@false.org>
To: Thinker Li <thinker@branda.to>
Cc: gdb-patches@sourceware.org
Subject: Re: Get backtrace at PLT and stepi into PLT
Date: Tue, 21 Jul 2009 18:15:00 -0000 [thread overview]
Message-ID: <20090721180907.GB11667@caradoc.them.org> (raw)
In-Reply-To: <19045.11906.492610.388479@bibi.branda.to>
On Tue, Jul 21, 2009 at 10:57:06AM +0800, Thinker Li wrote:
> You can not do backtrace when you stop at PLT with GDB.
> arm_stub_unwind_sniffer create a frame with NORMAL_FRAME type for
> PLT. But, when we do backtrace, get_prev_frame() will check if
> this frame inside_entry_func. Since we can not found any symbol for
> PLT, it:s func address is 0, and entry_point_address() is also 0 if
> symfile_objfile is NULL (no main symbol table). It makes problem on
> backtracing.
Thanks, that's much clearer. That's where the bug is. An unknown
function address should not be inside_entry_func.
--
Daniel Jacobowitz
CodeSourcery
next prev parent reply other threads:[~2009-07-21 18:09 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-17 8:48 Thinker Li
2009-07-17 14:26 ` Daniel Jacobowitz
[not found] ` <19040.34533.656545.753721@bibi.branda.to>
2009-07-17 15:07 ` Daniel Jacobowitz
[not found] ` <19044.7794.607077.330791@bibi.branda.to>
2009-07-20 13:15 ` Daniel Jacobowitz
2009-07-21 15:12 ` Thinker Li
2009-07-21 18:15 ` Daniel Jacobowitz [this message]
2009-07-22 12:12 ` Thinker Li
2009-07-22 15:49 ` Daniel Jacobowitz
-- strict thread matches above, loose matches on Subject: below --
2009-07-16 19:07 User Thinker
2009-07-16 19:11 ` Daniel Jacobowitz
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=20090721180907.GB11667@caradoc.them.org \
--to=drow@false.org \
--cc=gdb-patches@sourceware.org \
--cc=thinker@branda.to \
/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