2003-06-08 Andrew Cagney <cagney@redhat.com>

	* Makefile.in (d10v-tdep.o): Update dependencies.
	(SFILES): Add trad-frame.c.
	(trad_frame_h): Define.
	(COMMON_OBS): Add trad-frame.o.
	(trad-frame.o): Specify dependencies.
	* d10v-tdep.c: Include "trad-frame.h".
	(saved_regs_unwinder): Delete function.
	(d10v_frame_prev_register): Use trad_frame_prev_register.
	(struct d10v_unwind_cache): Change type of "saved_regs" to "struct
	trad_frame", delete "regs" and "prev_sp".
	(prologue_find_regs): Use trad-frame.
	* trad-frame.h, trad-frame.c: New files.

1 files changed, 96 insertions, 0 deletions

diff --git a/gdb/trad-frame.c b/gdb/trad-frame.c
new file mode 100644
index 00000000000..0188a4dce17
--- /dev/null
+++ b/gdb/trad-frame.c
@@ -0,0 +1,96 @@
+/* Traditional frame unwind support, for GDB the GNU Debugger.
+
+   Copyright 2003 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   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., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.  */
+
+#include "defs.h"
+#include "frame.h"
+#include "trad-frame.h"
+#include "regcache.h"
+
+/* A traditional frame is unwound by analysing the function prologue
+   and using the information gathered to track registers.  For
+   non-optimized frames, the technique is reliable (just need to check
+   for all potential instruction sequences).  */
+
+struct trad_frame *
+trad_frame_alloc_saved_regs (struct frame_info *next_frame)
+{
+  int i;
+  struct gdbarch *gdbarch = get_frame_arch (next_frame);
+  int numregs = NUM_REGS + NUM_PSEUDO_REGS;
+  struct trad_frame *this_saved_regs
+    = FRAME_OBSTACK_CALLOC (numregs, struct trad_frame);
+  for (i = 0; i < numregs; i++)
+    this_saved_regs[i].regnum = i;
+  return this_saved_regs;
+}
+
+void
+trad_frame_register_value (struct trad_frame this_saved_regs[],
+			   int regnum, LONGEST val)
+{
+  /* Make the REGNUM invalid, indicating that the ADDR contains the
+     register's value.  */
+  this_saved_regs[regnum].regnum = -1;
+  this_saved_regs[regnum].addr = val;
+}
+
+void
+trad_frame_prev_register (struct frame_info *next_frame,
+			  struct trad_frame this_saved_regs[],
+			  int regnum, int *optimizedp,
+			  enum lval_type *lvalp, CORE_ADDR *addrp,
+			  int *realnump, void *bufferp)
+{
+  struct gdbarch *gdbarch = get_frame_arch (next_frame);
+  if (this_saved_regs[regnum].regnum >= 0
+      && this_saved_regs[regnum].addr != 0)
+    {
+      /* The register was saved on the stack, fetch it.  */
+      *optimizedp = 0;
+      *lvalp = lval_memory;
+      *addrp = this_saved_regs[regnum].addr;
+      *realnump = -1;
+      if (bufferp != NULL)
+	{
+	  /* Read the value in from memory.  */
+	  get_frame_memory (next_frame, this_saved_regs[regnum].addr, bufferp,
+			    register_size (gdbarch, regnum));
+	}
+    }
+  else if (this_saved_regs[regnum].regnum >= 0
+	   && this_saved_regs[regnum].addr == 0)
+    {
+      /* As the next frame to return the value of the register.  */
+      frame_register_unwind (next_frame, this_saved_regs[regnum].regnum,
+			     optimizedp, lvalp, addrp, realnump, bufferp);
+    }
+  else
+    {
+      /* The register's value is available.  */
+      *optimizedp = 0;
+      *lvalp = not_lval;
+      *addrp = 0;
+      *realnump = -1;
+      if (bufferp != NULL)
+	store_unsigned_integer (bufferp, register_size (gdbarch, regnum),
+				this_saved_regs[regnum].addr);
+    }
+}