Bugzilla – Bug 153105
Hercules 3.03 complains about specification exception on CXGBR 0,11
Last modified: 2006-03-10 10:14:13 UTC
SLES10 Beta 5 for s390x isn't properly installable on Hercules 3.03 as Hercules complains about CXGBR-commands and throws specification exceptions on "mv" and "cp" (gcc-4.1 uses that opcode quite often...): starting yast... HHCCP014I CPU0000: Specification exception CODE=0006 ILC=4 CPU0000: PSW=0705E001 80000000 0000000080008604 INST=B3A6000B CXGBR 0,11 [..] /usr/lib/YaST2/startup/First-Stage/F07-config: line 9: 1652 Illegal instruction (core dumped) cp -f /proc/mounts /etc/mtab I found the following on the hercules-390 mailing list on this subject: To: hercules-390@yahoogroups.com Cc: zHercules@yahoogroups.com From: Pasi Pirhonen <upi@iki.fi> List-Id: <hercules-390.yahoogroups.com> Date: Wed, 15 Feb 2006 12:00:38 +0200 Subject: Re: [hercules-390] Do we have problem with emulation (Fedora Core 5 level linux stuff) Hi, On Wed, Feb 15, 2006 at 04:20:25AM -0500, Greg Smith wrote: > On Wed, 2006-02-15 at 10:31 +0200, Pasi Pirhonen wrote: > > > HHCCP014I CPU0001: Specification exception CODE=0006 ILC=4 > > CPU0001: PSW=0705E001 80000000 0000000080008B90 INST=B3A6000B CXGBR 0,11 > > > Hmmm, TFM says "For CXFBR and CXGBR, the R1 field must designate a valid > floating-point-register pair; otherwise, a specification exception is > recognized." > > But the code is doing `BFPREGPAIR2_CHECK(r1, r2, regs);'. This should > probably be `BFPREGPAIR2_CHECK(r1, 0, regs);' instead?? > --- hercules-cvs/ieee.c.BAD 2006-02-08 16:42:11.000000000 +0200 +++ hercules-cvs/ieee.c 2006-02-15 11:48:23.000000000 +0200 @@ -2032,7 +2032,7 @@ RRE(inst, regs, r1, r2); //logmsg("CXGBR r1=%d r2=%d\n", r1, r2); BFPINST_CHECK(regs); - BFPREGPAIR2_CHECK(r1, r2, regs); + BFPREGPAIR2_CHECK(r1, 0, regs); op2 = regs->GR_G(r2); [..]
Hmm, it complains about STSCH 0(3) now: HHCCP014I CPU0000: Operand exception CODE=0015 ILC=4 CPU0000: PSW=07041001 80000000 000000000033F0FA INST=B2343000 STSCH 0(3)
Hmm... Coming in this very minute: ---------- To: hercules-390@yahoogroups.com, hercules-390-announce@yahoogroups.com, zhercules@yahoogroups.com, ibm-main@bama.ua.edu, linux-390@vm.marist.edu From: Jay Maynard <jmaynard@conmicro.cx> Mailing-List: list hercules-390@yahoogroups.com; contact hercules-390-owner@yahoogroups.com Date: Fri, 24 Feb 2006 11:01:27 -0600 Subject: [hercules-390] Hercules 3.04 announcement What's new in release 3.04 Release date: 24 February 2006 CCKD garbage collection fix (Greg Smith) Reworked timing functions (Jan Jaeger) Codepage 1047 conversion tables (Kevin Leonard) Fixed off-by-one-day bug with SYSEPOCH other than 1900; added new config parameter, YROFFSET, and added warning if SYSEPOCH is not 1900 or 1960 (Jay Maynard, Jan Jaeger) New 2305 CKD disk emulation (Jay Maynard) Added floating point instructions CEGR, CDGR and CXGR (Bernard van der Helm) Added support for cgi-bin dynamic modules (David "Fish" Trout) Instruction fixes: PLO, CVB, CXFBR, CXGBR (Bernard van der Helm, David "Fish" Trout, Greg Smith, Pasi Pirhonen) Fix for Windows ..\relative path dasd files (David "Fish" Trout) This is a recommended update for all Hercules users. The CCKD garbage collection fix, in particular, fixes a problem that might cause CCKD DASD files to grow uncontrollably in unusual circumstances. -- Jay Maynard, K5ZC http://www.conmicro.cx http://jmaynard.livejournal.com http://www.tronguy.net http://www.hercules-390.org (Yes, that's me!) Buy Hercules stuff at http://www.cafepress.com/hercules-390 ---------- Does not mention the STSCH messages, but fixes various other issues as well.
Okay, the STSCH thing is still in 3.04... And it still needs the overflow patch...
Seems to be a kernel problem, see this mail by Cornelia Huck: http://permalink.gmane.org/gmane.linux.kernel/383551 Hannes, please get this patch into our kernel.
Already upstream & part of Beta7.