[MPlayer-users] Segmentation fault in pre5
Stefan Sassenberg
stefan.sassenberg at gmx.de
Thu Oct 21 23:54:01 CEST 2004
On Thu, Oct 21, 2004 at 12:46:58AM +0100, Martin Simmons wrote:
> >>>>> On Mon, 18 Oct 2004 22:17:49 +0200, Stefan Sassenberg <stefan.sassenberg at gmx.de> said:
>
> These crashes always seem to involve memory accesses near to MMX instructions
> and gdb ofen reports inexplicable register contents. To me this suggests one
> or more of the following problems:
>
> 1) your machine could be faulty
> 2) the kind of CPU in your machine might not be 100% MMX-compliant
> 3) your OS might be faulty
> 4) gdb could be broken
> 5) MPlayer's MMX code could be broken
>
> Since it happens in various different functions, I favour 1, 2 or 3 as the
> reason.
>
> What is the output from
>
> cat /proc/cpuinfo
ds9:~ # cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 6
model : 6
model name : AMD Athlon(tm) XP 2100+
stepping : 2
cpu MHz : 1741.716
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse syscall mmxext 3dnowext 3dnow
bogomips : 3424.25
>
> and which Linux kernel are you running?
ds9:~ # uname -a
Linux ds9 2.4.21-144-athlon #1 Fri Nov 14 00:01:10 UTC 2003 i686 athlon i386 GNU/Linux
(It's a precompiled kernel shipped with SuSE Linux 9.0)
>
> Also, I suggest you do the following extra gdb command after 'info all-registers'
> next time it crashes:
>
> x/64x $esp
>
Regards
Stefan
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