From: Holger Brunck <holger.brunck@keymile.com>
To: Lukas Berk <lberk@redhat.com>
Cc: Mark Wielaard <mjw@redhat.com>, systemtap@sourceware.org
Subject: Re: print_ubacktrace() and ppc 32
Date: Wed, 07 Aug 2013 07:16:00 -0000 [thread overview]
Message-ID: <5201F432.3000800@keymile.com> (raw)
In-Reply-To: <20130806190715.GA3387@redhat.com>
On 08/06/2013 09:07 PM, Lukas Berk wrote:
>>
>> So there is still something missing for ppc32.
>
> Ah too bad it wasn't a simple plug and play :) Would you mind trying
> again but running your script with the added stap option
> '-DDEBUG_UNWIND=99' and supplying the output? (ie, stap -DDEBUG_UNWIND=99
> --ldd -ve 'probe... )
>
probe compiled with:
stap -DDEBUG_UNWIND=99 -g -a powerpc -B CROSS_COMPILE=powerpc-linux- script.stp
On the target the trace output of staprun is:
_stp_stack_unwind_one_user:460: STARTING user unwind
0x10000448 : foo+0x1c/0x7c [/usr/local/bin/main]
_stp_stack_unwind_one_user:476: CONTINUING user unwind to depth 1
unwind:1452: pc=10000448, 10000448
unwind:1492: trying debug_frame
unwind_frame:1168: Module /usr/local/bin/main: no unwind frame data
unwind:1496: debug_frame failed: -5, trying eh_frame
unwind_frame:1168: Module /usr/local/bin/main: no unwind frame data
unwind:1504: unwinding failed: -5
_stp_stack_unwind_one_user:500: ret=-5 PC=10000448 SP=bfffd640
And the probed binary is crashing:
stap_ac60c2e404cade1c833497ae4f16b820_1577: systemtap: 2.3/0.152, base:
cc581000, memory: 34data/68text/3ctx/2058net/8alloc kb, probes: 1
Unable to handle kernel paging request for data at address 0xbffffb10
Faulting instruction address: 0xc04965d4
Oops: Kernel access of bad area, sig: 11 [#2]
PREEMPT km82xx
Modules linked in: stap_ac60c2e404cade1c833497ae4f16b820_1577(O) [last unloaded:
stap_ac60c2e404cade1c833497ae4f16b820_1577]
CPU: 0 PID: 407 Comm: main Tainted: G D O 3.10.0-04826-gc82c8d0-dirty #7
task: c7bab160 ti: c7b8c000 task.ti: c7b8c000
NIP: c04965d4 LR: c0000028 CTR: c03c742c
REGS: c7b8de10 TRAP: 0300 Tainted: G D O (3.10.0-04826-gc82c8d0-dirty)
MSR: 00009032 <EE,ME,IR,DR,RI> CR: 44000284 XER: 20000000
DAR: bffffb10, DSISR: 20000000
GPR00: c00bd950 c7b8dec0 c7bab160 c69d2104 c7b8df50 00000002 cc902209 38205350
GPR08: c0000000 c050b668 00000000 3b9aca00 28000288 10018794 00000000 00000000
GPR16: 00000000 00000000 00000000 00000000 100ab3f5 10081f20 c0440928 00000000
GPR24: c69d20d0 c69d2104 c69d20c0 00000000 c7b8c000 c7b8df50 c0000028 00000002
NIP [c04965d4] prom_init+0x28/0xfc0
LR [c0000028] __start+0x1c/0x30
Call Trace:
[c7b8dec0] [c00bd950] uprobe_notify_resume+0x4dc/0x920 (unreliable)
[c7b8df30] [c00099b0] do_notify_resume+0x78/0x94
[c7b8df40] [c0010848] do_user_signal+0x74/0xc4
--- Exception: 700 at 0x10000448
LR = 0x100004ec
Instruction dump:
9361004c 7cbb2b78 93a10054 7c9d2378 93c10058 7fc802a6 93e1005c 7cbf2b78
90010064 91c10018 93810050 91810014 <821efae8> 823eff98 88040000 829efaec
---[ end trace e21ded4f2ec79037 ]---
Segmentation fault
Version numbers:
Kernel: v3.10
gcc: powerpc-gcc (GCC) 4.6.4 20120303 (prerelease)
systemtap: 2.3-32645
Best regards
Holger
next prev parent reply other threads:[~2013-08-07 7:16 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-17 14:24 Holger Brunck
2013-06-17 17:43 ` Mark Wielaard
2013-06-17 18:00 ` Lukas Berk
2013-06-17 18:05 ` Mark Wielaard
2013-06-18 7:01 ` Holger Brunck
2013-08-03 1:12 ` Lukas Berk
2013-08-05 8:46 ` Holger Brunck
2013-08-06 19:07 ` Lukas Berk
2013-08-07 7:16 ` Holger Brunck [this message]
2013-08-09 15:21 ` Lukas Berk
2013-08-12 8:58 ` Holger Brunck
2013-06-18 6:46 ` Holger Brunck
2013-06-17 17:46 ` David Smith
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=5201F432.3000800@keymile.com \
--to=holger.brunck@keymile.com \
--cc=lberk@redhat.com \
--cc=mjw@redhat.com \
--cc=systemtap@sourceware.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
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 read-only IMAP folder(s) and NNTP newsgroup(s).