X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gdb%2Fdwarf2-frame.h;h=0470cac07fed58033b663796448ab8f720fed799;hb=2117c711ae07700adb57ea5b5ca61e4c32d7e3d2;hp=4b4c1a5ab2f4ca4cc9700b4b18f9cc2320de25ba;hpb=cfc14b3aa68dffce6c9db5070f8346841c9bc8a4;p=deliverable%2Fbinutils-gdb.git

diff --git a/gdb/dwarf2-frame.h b/gdb/dwarf2-frame.h
index 4b4c1a5ab2..0470cac07f 100644
--- a/gdb/dwarf2-frame.h
+++ b/gdb/dwarf2-frame.h
@@ -1,6 +1,6 @@
 /* Frame unwinder for frames with DWARF Call Frame Information.
 
-   Copyright 2003 Free Software Foundation, Inc.
+   Copyright (C) 2003-2014 Free Software Foundation, Inc.
 
    Contributed by Mark Kettenis.
 
@@ -8,7 +8,7 @@
 
    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
+   the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
 
    This program is distributed in the hope that it will be useful,
@@ -17,27 +17,118 @@
    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.  */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #ifndef DWARF2_FRAME_H
 #define DWARF2_FRAME_H 1
 
+struct gdbarch;
 struct objfile;
+struct frame_info;
+struct dwarf2_per_cu_data;
+struct agent_expr;
+struct axs_value;
 
-/* Return the frame unwind methods for the function that contains PC,
-   or NULL if it can't be handled by DWARF CFI frame unwinder.  */
+/* Register rule.  */
 
-const struct frame_unwind *dwarf2_frame_p (CORE_ADDR pc);
+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 are defined in Dwarf3.  */
+  DWARF2_FRAME_REG_SAVED_VAL_OFFSET,
+  DWARF2_FRAME_REG_SAVED_VAL_EXP,
+
+  /* These aren't defined by the DWARF2 CFI specification, but are
+     used internally by GDB.  */
+  DWARF2_FRAME_REG_FN,		/* Call a registered function.  */
+  DWARF2_FRAME_REG_RA,		/* Return Address.  */
+  DWARF2_FRAME_REG_RA_OFFSET,	/* Return Address with offset.  */
+  DWARF2_FRAME_REG_CFA,		/* Call Frame Address.  */
+  DWARF2_FRAME_REG_CFA_OFFSET	/* Call Frame Address with offset.  */
+};
+
+/* 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;
+    const gdb_byte *exp;
+    struct value *(*fn) (struct frame_info *this_frame, void **this_cache,
+			 int regnum);
+  } 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 *,
+					     struct frame_info *));
+
+/* Set the architecture-specific signal trampoline recognition
+   function for GDBARCH to SIGNAL_FRAME_P.  */
+
+extern void
+  dwarf2_frame_set_signal_frame_p (struct gdbarch *gdbarch,
+				   int (*signal_frame_p) (struct gdbarch *,
+							  struct frame_info *));
+
+/* Set the architecture-specific adjustment of .eh_frame and .debug_frame
+   register numbers.  */
+
+extern void
+  dwarf2_frame_set_adjust_regnum (struct gdbarch *gdbarch,
+				  int (*adjust_regnum) (struct gdbarch *,
+							int, int));
+
+/* Append the DWARF-2 frame unwinders to GDBARCH's list.  */
+
+void dwarf2_append_unwinders (struct gdbarch *gdbarch);
 
 /* 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.  */
 
-const struct frame_base *dwarf2_frame_base_p (CORE_ADDR pc);
+extern const struct frame_base *
+  dwarf2_frame_base_sniffer (struct frame_info *this_frame);
+
+/* Compute the DWARF CFA for a frame.  */
+
+CORE_ADDR dwarf2_frame_cfa (struct frame_info *this_frame);
 
-/* Register the DWARF CFI for OBJFILE.  */
+/* Update the agent expression EXPR with code to compute the CFA for a
+   frame at PC.  GDBARCH is the architecture of the function at PC.
+   This function may call dwarf2_compile_expr_to_ax; DATA is passed
+   through to that function if needed.  */
 
-void dwarf2_frame_build_info (struct objfile *objfile);
+extern void dwarf2_compile_cfa_to_ax (struct agent_expr *expr,
+				      struct axs_value *loc,
+				      struct gdbarch *gdbarch,
+				      CORE_ADDR pc,
+				      struct dwarf2_per_cu_data *data);
 
 #endif /* dwarf2-frame.h */