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From: J K <ellips@yahoo.com>
To: gdb@sources.redhat.com
Subject: gdb print /x always big endian order?
Date: Thu, 05 Feb 2004 18:00:00 -0000	[thread overview]
Message-ID: <20040205180043.68640.qmail@web13509.mail.yahoo.com> (raw)


 Hello,

 I've used a simple code to examine the storage
 of a short on a big and little endian machine.

 It seems in GNU gdb Red Hat Linux (5.1-1) when
 I do a print /x the order is Big Endian regardless
 of the host architecture. Just wondering if this
 is expected, I didn't see anything in the docs.

    short short_val = 31415;
    unsigned char buff[8];
    memcpy(buff,&short_val,2);
    printf("Short bytes 0x%x 0x%x\n",buff[0],buff[1]);
  
 on Little Endian machine:
    Short bytes 0xb7 0x7a  

 on Big Endian machine: 
    Short bytes 0x7a 0xb7  

  On the Little Endian machine in gdb:
(gdb) p short_val
$18 = 31415
(gdb) p /x short_val
$19 = 0x7ab7           <- not what I expected.
(gdb) x/2xb &short_val
0xbffff82a:     0xb7    0x7a
(gdb) x/2ub &short_val
0xbffff82a:     183     122 
  
  Memory is in the order I would expect but the
  print /x shows the order as Big Endian.
  
  Thanks,
  J.K.

   





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             reply	other threads:[~2004-02-05 18:00 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-02-05 18:00 J K [this message]
2004-02-05 18:04 ` Daniel Jacobowitz
2004-02-06  1:03 ` Andreas Schwab
2004-02-06  1:14   ` Bill Gatliff

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