1 files changed, 98 insertions, 0 deletions
diff --git a/contrib/gdb/gdb/dwarf2-frame.h b/contrib/gdb/gdb/dwarf2-frame.h
new file mode 100644
index 0000000..1ae44b5
--- /dev/null
+++ b/contrib/gdb/gdb/dwarf2-frame.h
@@ -0,0 +1,98 @@
+/* Frame unwinder for frames with DWARF Call Frame Information.
+
+   Copyright 2003, 2004 Free Software Foundation, Inc.
+
+   Contributed by Mark Kettenis.
+
+   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.  */
+
+#ifndef DWARF2_FRAME_H
+#define DWARF2_FRAME_H 1
+
+struct gdbarch;
+struct objfile;
+struct frame_info;
+
+/* Register rule.  */
+
+enum dwarf2_frame_reg_rule
+{
+  /* Make certain that 0 maps onto the correct enum value; the
+     corresponding structure is being initialized using memset zero.
+     This indicates that CFI didn't provide any information at all
+     about a register, leaving how to obtain its value totally
+     unspecified.  */
+  DWARF2_FRAME_REG_UNSPECIFIED = 0,
+
+  /* The term "undefined" comes from the DWARF2 CFI spec which this
+     code is moddeling; it indicates that the register's value is
+     "undefined".  GCC uses the less formal term "unsaved".  Its
+     definition is a combination of REG_UNDEFINED and REG_UNSPECIFIED.
+     The failure to differentiate the two helps explain a few problems
+     with the CFI generated by GCC.  */
+  DWARF2_FRAME_REG_UNDEFINED,
+  DWARF2_FRAME_REG_SAVED_OFFSET,
+  DWARF2_FRAME_REG_SAVED_REG,
+  DWARF2_FRAME_REG_SAVED_EXP,
+  DWARF2_FRAME_REG_SAME_VALUE,
+
+  /* These aren't defined by the DWARF2 CFI specification, but are
+     used internally by GDB.  */
+  DWARF2_FRAME_REG_RA,		/* Return Address.  */
+  DWARF2_FRAME_REG_CFA		/* Call Frame Address.  */
+};
+
+/* Register state.  */
+
+struct dwarf2_frame_state_reg
+{
+  /* Each register save state can be described in terms of a CFA slot,
+     another register, or a location expression.  */
+  union {
+    LONGEST offset;
+    ULONGEST reg;
+    unsigned char *exp;
+  } loc;
+  ULONGEST exp_len;
+  enum dwarf2_frame_reg_rule how;
+};
+
+/* Set the architecture-specific register state initialization
+   function for GDBARCH to INIT_REG.  */
+
+extern void dwarf2_frame_set_init_reg (struct gdbarch *gdbarch,
+				       void (*init_reg) (struct gdbarch *, int,
+					     struct dwarf2_frame_state_reg *));
+
+/* Return the frame unwind methods for the function that contains PC,
+   or NULL if it can't be handled by DWARF CFI frame unwinder.  */
+
+extern const struct frame_unwind *
+  dwarf2_frame_sniffer (struct frame_info *next_frame);
+
+/* Return the frame base methods for the function that contains PC, or
+   NULL if it can't be handled by the DWARF CFI frame unwinder.  */
+
+extern const struct frame_base *
+  dwarf2_frame_base_sniffer (struct frame_info *next_frame);
+
+/* Register the DWARF CFI for OBJFILE.  */
+
+void dwarf2_frame_build_info (struct objfile *objfile);
+
+#endif /* dwarf2-frame.h */