A ton of changes to improve C++ debugging. See ChangeLog.

[deliverable/binutils-gdb.git] / gdb / m88k-tdep.c

diff --git a/gdb/m88k-tdep.c b/gdb/m88k-tdep.c
index 65e39f6b0a88d8746ab36982cc4722e80d47db3c..1d71a512ba3a8fc16bd4c5dde06b9ba7a340cfde 100644 (file)
--- a/gdb/m88k-tdep.c
+++ b/gdb/m88k-tdep.c
@@ -17,9 +17,7 @@ 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.  */
 
-#include <stdio.h>
 #include "defs.h"
-#include "param.h"
 #include "frame.h"
 #include "inferior.h"
 #include "value.h"
@@ -93,14 +91,7 @@ frame_chain_valid (chain, thisframe)
      struct frame_info *thisframe;
 {
   return (chain != 0
-       && outside_startup_file (FRAME_SAVED_PC (thisframe)));
-}
-
-CORE_ADDR
-frame_chain_combine (chain, thisframe)
-     CORE_ADDR chain;
-{
-  return chain;
+       && !inside_entry_file (FRAME_SAVED_PC (thisframe)));
 }
 
 void
@@ -112,18 +103,6 @@ init_extra_frame_info (fromleaf, fi)
   fi->args_pointer = 0;                /* Unknown */
   fi->locals_pointer = 0;      /* Unknown */
 }
-
-void
-init_frame_pc (fromleaf, prev)
-     int fromleaf;
-     struct frame_info *prev;
-{
-  /* FIXME, for now it's the default from blockframe.c.   If it stays that
-     way, remove it entirely from here.  */
-  prev->pc = (fromleaf ? SAVED_PC_AFTER_CALL (prev->next) :
-              prev->next ? FRAME_SAVED_PC (prev->next) : read_pc ());
-
-}
 \f
 /* Examine an m88k function prologue, recording the addresses at which
    registers are saved explicitly by the prologue code, and returning
@@ -251,6 +230,32 @@ examine_prologue (ip, limit, frame_sp, fsr, fi)
   bzero (must_adjust, sizeof (must_adjust));
   next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2);
 
+  /* Accept move of incoming registers to other registers, using
+     "or rd,rs,0" or "or.u rd,rs,0" or "or rd,r0,rs" or "or rd,rs,r0".
+     We don't have to worry about walking into the first lines of code,
+     since the first line number will stop us (assuming we have symbols).
+     What we have actually seen is "or r10,r0,r12".  */
+
+#define        OR_MOVE_INSN    0x58000000              /* or/or.u with immed of 0 */
+#define        OR_MOVE_MASK    0xF800FFFF
+#define        OR_REG_MOVE1_INSN       0xF4005800      /* or rd,r0,rs */
+#define        OR_REG_MOVE1_MASK       0xFC1FFFE0
+#define        OR_REG_MOVE2_INSN       0xF4005800      /* or rd,rs,r0 */
+#define        OR_REG_MOVE2_MASK       0xFC00FFFF
+  while (next_ip && 
+        ((insn1 & OR_MOVE_MASK) == OR_MOVE_INSN ||
+         (insn1 & OR_REG_MOVE1_MASK) == OR_REG_MOVE1_INSN ||
+         (insn1 & OR_REG_MOVE2_MASK) == OR_REG_MOVE2_INSN
+        )
+       )
+    {
+      /* We don't care what moves to where.  The result of the moves 
+        has already been reflected in what the compiler tells us is the
+        location of these parameters.  */
+      ip = next_ip;
+      next_ip = NEXT_PROLOGUE_INSN (ip, limit, &insn1, &insn2);
+    }
+
   /* Accept an optional "subu sp,sp,n" to set up the stack pointer.  */
 
 #define        SUBU_SP_INSN    0x67ff0000