Thu May 21 13:14:25 1998 John Metzler <jmetzler@cygnus.com>

[deliverable/binutils-gdb.git] / gdb / remote-vx29k.c

diff --git a/gdb/remote-vx29k.c b/gdb/remote-vx29k.c
index 519d9300eb3934b6753e55ebfe478862f0841b34..02554aaa31c4f9f8a8f6d79b7f2a1bda5d3b40e2 100644 (file)
--- a/gdb/remote-vx29k.c
+++ b/gdb/remote-vx29k.c
@@ -17,7 +17,7 @@ GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 
 #include <stdio.h>
 #include "defs.h"
@@ -32,7 +32,7 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 #include "symtab.h"
 #include "symfile.h"           /* for struct complaint */
 
-#include <string.h>
+#include "gdb_string.h"
 #include <errno.h>
 #include <signal.h>
 #include <fcntl.h>
@@ -97,7 +97,7 @@ vx_read_register (regno)
 
   /* PAD For now, don't care about exop register */
 
-  bzero (&registers[REGISTER_BYTE (EXO_REGNUM)], 1 * AM29K_GREG_SIZE);
+  memset (&registers[REGISTER_BYTE (EXO_REGNUM)], '\0', AM29K_GREG_SIZE);
 
   /* If the target has floating point registers, fetch them.
      Otherwise, zero the floating point register values in
@@ -113,16 +113,16 @@ vx_read_register (regno)
 
       /* PAD For now, don't care about registers (?) AI0 to q */
 
-      bzero (&registers[REGISTER_BYTE (161)], 21 * AM29K_FPREG_SIZE);
+      memset (&registers[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE);
     }
   else
     { 
-      bzero (&registers[REGISTER_BYTE (FPE_REGNUM)], 1 * AM29K_FPREG_SIZE);
-      bzero (&registers[REGISTER_BYTE (FPS_REGNUM)], 1 * AM29K_FPREG_SIZE);
+      memset (&registers[REGISTER_BYTE (FPE_REGNUM)], '\0', AM29K_FPREG_SIZE);
+      memset (&registers[REGISTER_BYTE (FPS_REGNUM)], '\0', AM29K_FPREG_SIZE);
 
       /* PAD For now, don't care about registers (?) AI0 to q */
 
-      bzero (&registers[REGISTER_BYTE (161)], 21 * AM29K_FPREG_SIZE);
+      memset (&registers[REGISTER_BYTE (161)], '\0', 21 * AM29K_FPREG_SIZE);
     }
 
   /* Mark the register cache valid.  */
@@ -167,3 +167,22 @@ vx_write_register (regno)
     }
 }
 
+/* VxWorks zeroes fp when the task is initialized; we use this
+   to terminate the frame chain. Chain means here the nominal address of
+   a frame, that is, the return address (lr0) address in the stack. To
+   obtain the frame pointer (lr1) contents, we must add 4 bytes.
+   Note : may be we should modify init_frame_info() to get the frame pointer
+          and store it into the frame_info struct rather than reading its
+          contents when FRAME_CHAIN_VALID is invoked. */
+
+int
+get_fp_contents (chain, thisframe)
+     CORE_ADDR chain;
+     struct frame_info *thisframe;      /* not used here */
+{
+   int fp_contents;
+
+   read_memory ((CORE_ADDR)(chain + 4), (char *) &fp_contents, 4);
+   return (fp_contents != 0);
+}
+