int target_query(what, aux, buf, offset, len)

[Andrew Cagney <ac131313 at redhat dot com>]

Hello,

Ref: The bottom of:
http://sources.redhat.com/ml/gdb-patches/2003-10/msg00158.html
and replies.

has identified the need to update target_query().  The present interface 
looks like:

int target_query (int /*char */ query_type,
                  char *buf,
                  char *outbuf,
                  int *bufsiz);

Where QUERY_TYPE and BUF are used to construct the query sent to the 
target.  I'd like to propose that it be changed to:

long
target_query (enum target_query_type query_type, const char *aux,
              void *outbuf, CORE_ADDR offset, long length);

It attempts to query OFFSET:LENGTH bytes returning them in outbuf.

The number of bytes actually transfered is returned, or zero if no more 
bytes are available, or -1 if the query isn't supported.  This allows 
short reads.

Defined QUERY_TYPEs include QUERY_TYPE_T, QUERY_TYPE_P, others can be 
added later.  Some queries require suplemental information and that can 
be passed using the string buffer AUX.

The "auxv" could be transfered using (QUERY_TYPE_PROC_AUXV, ...) or 
(QUERY_TYPE_PROC, "auxv", ...)

thoughts,
Andrew