* a29k-tdep.c (get_longjmp_target): add this function, from WRS.

        * remote-vx.c: move read_register and write_register out to
        target specific files.
        * remote-vx29k.c (get_fp_contnets): add this function, from WRS.

1 files changed, 24 insertions, 5 deletions

diff --git a/gdb/remote-vx29k.c b/gdb/remote-vx29k.c
index 519d930..5621bce 100644
--- a/gdb/remote-vx29k.c
+++ b/gdb/remote-vx29k.c
@@ -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);
+}
+