From kde-bugs-dist  Sun May 11 14:43:29 2008
From: Julian Seward <jseward () acm ! org>
Date: Sun, 11 May 2008 14:43:29 +0000
To: kde-bugs-dist
Subject: [Bug 158730] ppc: illegal opcode crash on instruction fctiwz
Message-Id: <20080511144329.11306.qmail () ktown ! kde ! org>
X-MARC-Message: https://marc.info/?l=kde-bugs-dist&m=121051698827849

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------- Additional Comments From jseward acm org  2008-05-11 16:43 -------
Getting there ... maybe ..

In m_signals.c find this

	 if (event != NULL) {
	    if (haveaddr)
	       VG_(message)(Vg_UserMsg, " %s at address %p", 
			    event, info->VKI_SIGINFO_si_addr);

which is around line 1280 in the trunk sources.  I need to know
the value of *(UInt*)(info->VKI_SIGINFO_si_addr) when the message
is printed, iow change to

	       VG_(message)(Vg_UserMsg, " %s at address %p insn=0x%x", 
			    event, info->VKI_SIGINFO_si_addr,
                            *(UInt*)(info->VKI_SIGINFO_si_addr)
                            );

We could also (possibly) short-circuit all this: does your cpu have
some limitation on FP instruction support?  I ask because I think it
is barfing on the code that Valgrind generates for itself to run.