Bug 230000

Summary: GDB does not disassemble DFP / Power6 instructions
Product: [Fedora] Fedora Reporter: Jan Kratochvil <jan.kratochvil>
Component: gdbAssignee: Jan Kratochvil <jan.kratochvil>
Status: CLOSED RAWHIDE QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: cagney, konradr
Target Milestone: ---Keywords: Reopened
Target Release: ---   
Hardware: ppc64   
OS: Linux   
Whiteboard:
Fixed In Version: gdb-6.6-14.fc7 Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2007-04-28 21:53:05 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 227592    
Bug Blocks:    
Attachments:
Description Flags
Shell testcase from bauerman@br.ibm.com, requires gcc-4.2/4.3+ none

Description Jan Kratochvil 2007-02-25 18:36:48 UTC 
+++ This bug was initially created as a clone of Bug #227592 +++

GDB 6.6 is the first official release to include support for Power6's DFP
(Decimal Floating Point) instructions. DFP is an important feature for Power6 HW. 

IBM Confidential: no 

----- Additional Comments From thiagoju.com (prefers email at
bauerman.com)  2007-01-29 06:15 EDT -------
 
I just attached the testcase for the feature. 

----- Additional Comments From thiagoju.com (prefers email at
bauerman.com)  2007-01-31 19:37 EDT -------
 
Change disassembler to decode any ppc instruction

Hi,

This is the fix I mentioned in comment #6. It is needed even in GDB 6.6 to
make
GDB disassemble Power6 DFP instructions. With this fix, the attached
testcase
passes.

----- Additional Comments From thiagoju.com (prefers email at
bauerman.com)  2007-02-01 05:59 EDT -------
Sorry, I mentioned the wrong URL to the patch submission:

http://www.sourceware.org/ml/gdb-patches/2007-02/msg00000.html 

----- Additional Comments From thiagoju.com (prefers email at
bauerman.com)  2007-02-09 14:07 EDT -------
The patch was accepted upstream yesterday:

http://www.sourceware.org/ml/gdb-patches/2007-02/msg00091.html
Comment 1 Jan Kratochvil 2007-02-25 18:36:48 UTC 
Created attachment 148760 [details]
Shell testcase from bauerman.com, requires gcc-4.2/4.3+
Comment 2 Jan Kratochvil 2007-02-25 22:08:46 UTC 
* Sun Feb 25 2007 Jan Kratochvil <jan.kratochvil> - 6.6-4
- Backport + testcase for PPC Power6/DFP instructions disassembly (BZ 230000).

Provided only a simplified testcase not requiring GCC currently not yet present
even in RawHide.
Comment 3 Jan Kratochvil 2007-04-28 18:25:48 UTC 
lan Modra recently made this fix which is necessary to correctly disassemble DFP
instructions.

Here's the submission to upstream:

http://sources.redhat.com/ml/binutils/2007-04/msg00249.html
Comment 4 Jan Kratochvil 2007-04-28 21:53:05 UTC 
Comment 3 fix committed to Rawhide:
* Sat Apr 28 2007 Jan Kratochvil <jan.kratochvil> - 6.6-14
- Fixup for the PPC Power6/DFP instructions disassembly (BZ 230000).