Bug#768360: iceweasel: crashes with Illegal instruction at startup

[Ondrej Zary]

On Saturday 08 November 2014 08:04:08 Mike Hommey wrote:
> On Sat, Nov 08, 2014 at 12:04:09AM +0100, Ondrej Zary wrote:
> > On Friday 07 November 2014 23:32:55 Mike Hommey wrote:
> > > On Fri, Nov 07, 2014 at 09:24:23PM +0100, Ondrej Zary wrote:
> > > > Program received signal SIGILL, Illegal instruction.
> > > > [Switching to Thread 0xab7feb70 (LWP 7670)]
> > > > 0xad42fbf2 in ?? ()
> > > > (gdb) disassemble
> > > > No function contains program counter for selected frame.
> > > > (gdb) 
> > > 
> > > Try disassemble 0xad42fbf2,+10 (adapting to whatever new address you get
> > > on next attempt)
> > 
> > 
> > Thanks, it looks good now:
> > 
> > Program received signal SIGILL, Illegal instruction.
> > [Switching to Thread 0xab7feb70 (LWP 12776)]
> > 0xaec24272 in ?? ()
> > (gdb) disassemble 0xaec24272,+10
> > Dump of assembler code from 0xaec24272 to 0xaec2427c:
> > => 0xaec24272:  xorpd  %xmm0,%xmm0
> >    0xaec24276:  cvtsi2sd %edx,%xmm0
> >    0xaec2427a:  jmp    0xaec2428a
> > End of assembler dump.
> > 
> > xorpd is a SSE instruction :(. I wonder if this is just a compiler flag problem or this crap is generated by Firefox JIT compiler?
> 
> Could you give a try to version 33.0, 34.0 and/or 35.0 from
> mozilla.debian.net?

33.0-2~bpo70+1 crashes the same way even in safe mode:

Program received signal SIGILL, Illegal instruction.
[Switching to Thread 0xaaefeb70 (LWP 14874)]
0xac6350b2 in ?? ()
(gdb) disassemble 0xac6350b2,+10
Dump of assembler code from 0xac6350b2 to 0xac6350bc:
=> 0xac6350b2:  xorpd  %xmm0,%xmm0
   0xac6350b6:  cvtsi2sd %edx,%xmm0
   0xac6350ba:  jmp    0xac6350ca
End of assembler dump.


34.0~b1-1~bpo70+1 works in safe mode but crashes in normal mode:

Program received signal SIGILL, Illegal instruction.
0xb0d09a16 in ?? ()
(gdb) disassemble 0xb0d09a16,+10
Dump of assembler code from 0xb0d09a16 to 0xb0d09a20:
=> 0xb0d09a16:  movsd  %xmm7,0x38(%esp)
   0xb0d09a1c:  movsd  %xmm6,0x30(%esp)
End of assembler dump.


35.0~a2+20141017004001-1~bpo70+1 works in safe mode but crashes in normal mode:

Program received signal SIGILL, Illegal instruction.
0xafe0d4b7 in ?? ()
(gdb) disassemble 0xafe0d4b7,+10
Dump of assembler code from 0xafe0d4b7 to 0xafe0d4c1:
=> 0xafe0d4b7:  unpcklps %xmm7,%xmm0
   0xafe0d4ba:  cmp    $0xffffff80,%eax
   0xafe0d4bd:  jb     0xafe0d4d9
End of assembler dump.

(~/.mozilla removed before each run)

-- 
Ondrej Zary