[rfa] fix invidious casting bug in infptrace.c with 64-bit CORE_ADDR

[Daniel Jacobowitz <dmj+@andrew.cmu.edu>]

This causes all sorts of interesting problems if memaddr happens to be, say,
0x17fffff00 (i.e. 33 bits).  There's something else wrong that memaddr was
so large, since ptrace on MIPS/Linux will truncate it back to 32-bit anyway,
but we still shouldn't let this happen.  memaddr and addr end up 4G apart,
and count is unimaginably too large.

OK to commit?


-- 
Daniel Jacobowitz                           Carnegie Mellon University
MontaVista Software                         Debian GNU/Linux Developer

2001-07-25  Daniel Jacobowitz  <drow@mvista.com>

	* infptrace.c (child_xfer_memory): Add cast to CORE_ADDR.

Index: infptrace.c
===================================================================
RCS file: /cvs/src/src/gdb/infptrace.c,v
retrieving revision 1.16
diff -u -r1.16 infptrace.c
--- infptrace.c	2001/06/15 23:50:46	1.16
+++ infptrace.c	2001/07/26 00:26:56
@@ -497,7 +497,7 @@
 {
   register int i;
   /* Round starting address down to longword boundary.  */
-  register CORE_ADDR addr = memaddr & -sizeof (PTRACE_XFER_TYPE);
+  register CORE_ADDR addr = memaddr & -(CORE_ADDR) sizeof (PTRACE_XFER_TYPE);
   /* Round ending address up; get number of longwords that makes.  */
   register int count
   = (((memaddr + len) - addr) + sizeof (PTRACE_XFER_TYPE) - 1)