GDB 6.1 (excluding .info files)

1 files changed, 134 insertions, 0 deletions

diff --git a/gnu/usr.bin/binutils/gdb/trad-frame.c b/gnu/usr.bin/binutils/gdb/trad-frame.c
new file mode 100644
index 00000000000..f397f5d8241
--- /dev/null
+++ b/gnu/usr.bin/binutils/gdb/trad-frame.c
@@ -0,0 +1,134 @@
+/* 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_saved_reg *
+trad_frame_alloc_saved_regs (struct frame_info *next_frame)
+{
+  int regnum;
+  struct gdbarch *gdbarch = get_frame_arch (next_frame);
+  int numregs = NUM_REGS + NUM_PSEUDO_REGS;
+  struct trad_frame_saved_reg *this_saved_regs
+    = FRAME_OBSTACK_CALLOC (numregs, struct trad_frame_saved_reg);
+  for (regnum = 0; regnum < numregs; regnum++)
+    {
+      this_saved_regs[regnum].realreg = regnum;
+      this_saved_regs[regnum].addr = -1;
+    }      
+  return this_saved_regs;
+}
+
+enum { REG_VALUE = -1, REG_UNKNOWN = -2 };
+
+int
+trad_frame_value_p (struct trad_frame_saved_reg this_saved_regs[], int regnum)
+{
+  return (this_saved_regs[regnum].realreg == REG_VALUE);
+}
+
+int
+trad_frame_addr_p (struct trad_frame_saved_reg this_saved_regs[], int regnum)
+{
+  return (this_saved_regs[regnum].realreg >= 0
+	  && this_saved_regs[regnum].addr != -1);
+}
+
+int
+trad_frame_realreg_p (struct trad_frame_saved_reg this_saved_regs[],
+		      int regnum)
+{
+  return (this_saved_regs[regnum].realreg >= 0
+	  && this_saved_regs[regnum].addr == -1);
+}
+
+void
+trad_frame_set_value (struct trad_frame_saved_reg this_saved_regs[],
+		      int regnum, LONGEST val)
+{
+  /* Make the REALREG invalid, indicating that the ADDR contains the
+     register's value.  */
+  this_saved_regs[regnum].realreg = REG_VALUE;
+  this_saved_regs[regnum].addr = val;
+}
+
+void
+trad_frame_set_unknown (struct trad_frame_saved_reg this_saved_regs[],
+			int regnum)
+{
+  /* Make the REALREG invalid, indicating that the value is not known.  */
+  this_saved_regs[regnum].realreg = REG_UNKNOWN;
+  this_saved_regs[regnum].addr = -1;
+}
+
+void
+trad_frame_prev_register (struct frame_info *next_frame,
+			  struct trad_frame_saved_reg this_saved_regs[],
+			  int regnum, int *optimizedp,
+			  enum lval_type *lvalp, CORE_ADDR *addrp,
+			  int *realregp, void *bufferp)
+{
+  struct gdbarch *gdbarch = get_frame_arch (next_frame);
+  if (trad_frame_addr_p (this_saved_regs, regnum))
+    {
+      /* The register was saved in memory.  */
+      *optimizedp = 0;
+      *lvalp = lval_memory;
+      *addrp = this_saved_regs[regnum].addr;
+      *realregp = -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 (trad_frame_realreg_p (this_saved_regs, regnum))
+    {
+      /* Ask the next frame to return the value of the register.  */
+      frame_register_unwind (next_frame, this_saved_regs[regnum].realreg,
+			     optimizedp, lvalp, addrp, realregp, bufferp);
+    }
+  else if (trad_frame_value_p (this_saved_regs, regnum))
+    {
+      /* The register's value is available.  */
+      *optimizedp = 0;
+      *lvalp = not_lval;
+      *addrp = 0;
+      *realregp = -1;
+      if (bufferp != NULL)
+	store_unsigned_integer (bufferp, register_size (gdbarch, regnum),
+				this_saved_regs[regnum].addr);
+    }
+  else
+    {
+      error ("Register %s not available",
+	     gdbarch_register_name (gdbarch, regnum));
+    }
+}