Re: [Qemu-devel] Printing bogus values in ne2000_asic_ioport_read()/ ne2000_receive()

["Joseph Stewart" <joseph.stewart@gmail.com>]

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Change the function argument from signed to unsigned and see it printf
handles prints the values correctly. I.E.

static void print_packet(unsigned char *s, int len) ...

-joe

On 2/25/06, Umamaheswararao Karyampudi <kumrao2003@yahoo.com> wrote:
>
> Hi,
> I am using QEMU in one of my research projects. I
> landed in a problem where I see bogus numbers being
> printed when I printed the packet/each word that is
> received from ne2000.
>
> In ne2000_receive(), I copied the packet received to a
> static char [] and printed the packet using
> static void print_packet(char *s, int len)
> {
>   int i,j;
>   for (i=0;i<len;i++) {
>       if (i%20 == 0)
>           printf("\n");
>       printf("%02x ", s[i]);
>   }
>           printf("\n");
> }
> And some bytes it prints as fffffffff<last byte>
> instead of just the last byte.
> For eg:
> 52 54 00 12 34 56 00 ffffffff 4f 0a 46 05 08 00 45 00
> 00 ffffff80 00 00
> 40 00 40 01 ffffffbc 2b ffffffc0 ffffffa8 fffffffe
> fffffffe ffffffc0 ffffffa8 ff
>
> Similarly in ne2000_asic_ioport_read(), I print each
> word that is read from NetDriverState.s->mem using the
> following -
> printf("\n %02x %02x", (char)(ret &0xff), (char) (
> (ret >> 8) && 0xff));
> And occasionally I see the 4 bytes printed instead of
> 1 byte for each value.
>
> Any reason why it happens? Also,
> ne2000_asic_ioport_read(), reads 6 bytes before
> reading actual packet? I can think of 4 bytes for CRC
> but not for the remaining 2 bytes  - eg - If pak is -
> 52 54 00 12 34 56 00 ffffffff 4f 0a 46 05 08 00 45 00
> 00 ffffff80 00 00
> 40 00 40 01 ffffffbc 2b
> In asic_ioport_read() -
> rdw 01 59
> rdw 92 00
> rdw 52 54
> rdw 52 54
> rdw 00 12
> rdw 34 56
>
> Anyhelp is greatly appreciated.
>
> Thanks
> Uma
>
>
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