[ECOS] Send function segment buf address is invalid

[mkhoyila@uci.edu]

Upon completing the eth0 initialization, eCos calls my send function. This
is partial code of my mips send function. memcpy fails because the address
of sg_list->buf passed is invalid. I checked it and it is
Hex: FFFF FFFF 8007 98D6

Can someone help me to see why such invalid address is passed. Thanks.

Michael


         for (last_sg = &sg_list[sg_len]; sg_list < last_sg; sg_list++) {
	    cyg_uint8 *from_p;
	    int l;

	    from_p = (cyg_uint8 *)(sg_list->buf); //invalid address here
	    l = sg_list->len;

	    if (l > total_len)
	       l = total_len;
	    memcpy((unsigned char *)to_p, from_p, l);

	    to_p += l;
	    total_len -= l;

	    if (total_len < 0)
	       continue; // Should exit via sg_last normally
	  }


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