RE: remote XOpenDisplay in Solaris (SunOS 5.6)

[David Korn <dkorn@pixelpower.com>]

>-----Original Message-----
>From: Jerry Miller [ mailto:gmiller@cs.sunysb.edu ]
>Sent: 27 February 2001 19:17

>Here's a dump of the first few values in big-endian
>shortword format (patterned after od -x).  Does
>anyone know enough assembler for the UltraSparc 5
>(68XXX???) to be able to tell me where the address
>starts (and whether it is an actual address or a further
>indirection)?
>
>0300 099c 30bf fd98 0100 0000 0100 0000
>001f cb28 0000 0040 0000 0000 001f 802c
>
>A simple test program, which does nothing but call
>the dump function, instead yields:
>
>0300 0084 30bf ffde 0100 0000 0100 0000
>0002 0a88 0000 0000 0000 0000 0002 09b4

  Is this the actual linked code from memory, or are you dumping the 
object file here?  All those zeroes don't look right to me, so if this
is what's in memory, it looks like it hasn't been linked correctly.

>(Where's a disassembler when I need one?!?!)

  Right, let me think about this.  We know that the first few instructions
are the function prologue, so I'd reckon that those negative numbers
$fd98 and $ffde are the stack frame adjustments, so that would mean that
$30bf $xxxx is link #xxxx,a6.  $0a88 is one I vaguely recognize as well,
I think that's a load to a register....  All those zeroes just can't be
right though.

  I think your best bet is to run your program under gdb.  That will trap
on the segv and you can have a look at the stack frame and see which 
functions have been called by which other functions in which order.

       DaveK
-- 
 All your base are belong to us!


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