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[/] [openrisc/] [trunk/] [gnu-old/] [gdb-6.8/] [gdb/] [dwarf2-frame.h] - Diff between revs 827 and 840

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/* Frame unwinder for frames with DWARF Call Frame Information.
/* Frame unwinder for frames with DWARF Call Frame Information.
 
 
   Copyright (C) 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
   Copyright (C) 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
 
 
   Contributed by Mark Kettenis.
   Contributed by Mark Kettenis.
 
 
   This file is part of GDB.
   This file is part of GDB.
 
 
   This program is free software; you can redistribute it and/or modify
   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
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.
   (at your option) any later version.
 
 
   This program is distributed in the hope that it will be useful,
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   GNU General Public License for more details.
 
 
   You should have received a copy of the GNU General Public License
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 
#ifndef DWARF2_FRAME_H
#ifndef DWARF2_FRAME_H
#define DWARF2_FRAME_H 1
#define DWARF2_FRAME_H 1
 
 
struct gdbarch;
struct gdbarch;
struct objfile;
struct objfile;
struct frame_info;
struct frame_info;
 
 
/* Register rule.  */
/* Register rule.  */
 
 
enum dwarf2_frame_reg_rule
enum dwarf2_frame_reg_rule
{
{
  /* Make certain that 0 maps onto the correct enum value; the
  /* Make certain that 0 maps onto the correct enum value; the
     corresponding structure is being initialized using memset zero.
     corresponding structure is being initialized using memset zero.
     This indicates that CFI didn't provide any information at all
     This indicates that CFI didn't provide any information at all
     about a register, leaving how to obtain its value totally
     about a register, leaving how to obtain its value totally
     unspecified.  */
     unspecified.  */
  DWARF2_FRAME_REG_UNSPECIFIED = 0,
  DWARF2_FRAME_REG_UNSPECIFIED = 0,
 
 
  /* The term "undefined" comes from the DWARF2 CFI spec which this
  /* The term "undefined" comes from the DWARF2 CFI spec which this
     code is moddeling; it indicates that the register's value is
     code is moddeling; it indicates that the register's value is
     "undefined".  GCC uses the less formal term "unsaved".  Its
     "undefined".  GCC uses the less formal term "unsaved".  Its
     definition is a combination of REG_UNDEFINED and REG_UNSPECIFIED.
     definition is a combination of REG_UNDEFINED and REG_UNSPECIFIED.
     The failure to differentiate the two helps explain a few problems
     The failure to differentiate the two helps explain a few problems
     with the CFI generated by GCC.  */
     with the CFI generated by GCC.  */
  DWARF2_FRAME_REG_UNDEFINED,
  DWARF2_FRAME_REG_UNDEFINED,
  DWARF2_FRAME_REG_SAVED_OFFSET,
  DWARF2_FRAME_REG_SAVED_OFFSET,
  DWARF2_FRAME_REG_SAVED_REG,
  DWARF2_FRAME_REG_SAVED_REG,
  DWARF2_FRAME_REG_SAVED_EXP,
  DWARF2_FRAME_REG_SAVED_EXP,
  DWARF2_FRAME_REG_SAME_VALUE,
  DWARF2_FRAME_REG_SAME_VALUE,
 
 
  /* These are defined in Dwarf3.  */
  /* These are defined in Dwarf3.  */
  DWARF2_FRAME_REG_SAVED_VAL_OFFSET,
  DWARF2_FRAME_REG_SAVED_VAL_OFFSET,
  DWARF2_FRAME_REG_SAVED_VAL_EXP,
  DWARF2_FRAME_REG_SAVED_VAL_EXP,
 
 
  /* These aren't defined by the DWARF2 CFI specification, but are
  /* These aren't defined by the DWARF2 CFI specification, but are
     used internally by GDB.  */
     used internally by GDB.  */
  DWARF2_FRAME_REG_RA,          /* Return Address.  */
  DWARF2_FRAME_REG_RA,          /* Return Address.  */
  DWARF2_FRAME_REG_RA_OFFSET,   /* Return Address with offset.  */
  DWARF2_FRAME_REG_RA_OFFSET,   /* Return Address with offset.  */
  DWARF2_FRAME_REG_CFA,         /* Call Frame Address.  */
  DWARF2_FRAME_REG_CFA,         /* Call Frame Address.  */
  DWARF2_FRAME_REG_CFA_OFFSET   /* Call Frame Address with offset.  */
  DWARF2_FRAME_REG_CFA_OFFSET   /* Call Frame Address with offset.  */
};
};
 
 
/* Register state.  */
/* Register state.  */
 
 
struct dwarf2_frame_state_reg
struct dwarf2_frame_state_reg
{
{
  /* Each register save state can be described in terms of a CFA slot,
  /* Each register save state can be described in terms of a CFA slot,
     another register, or a location expression.  */
     another register, or a location expression.  */
  union {
  union {
    LONGEST offset;
    LONGEST offset;
    ULONGEST reg;
    ULONGEST reg;
    unsigned char *exp;
    unsigned char *exp;
  } loc;
  } loc;
  ULONGEST exp_len;
  ULONGEST exp_len;
  enum dwarf2_frame_reg_rule how;
  enum dwarf2_frame_reg_rule how;
};
};
 
 
/* Set the architecture-specific register state initialization
/* Set the architecture-specific register state initialization
   function for GDBARCH to INIT_REG.  */
   function for GDBARCH to INIT_REG.  */
 
 
extern void dwarf2_frame_set_init_reg (struct gdbarch *gdbarch,
extern void dwarf2_frame_set_init_reg (struct gdbarch *gdbarch,
                                       void (*init_reg) (struct gdbarch *, int,
                                       void (*init_reg) (struct gdbarch *, int,
                                             struct dwarf2_frame_state_reg *,
                                             struct dwarf2_frame_state_reg *,
                                             struct frame_info *));
                                             struct frame_info *));
 
 
/* Set the architecture-specific signal trampoline recognition
/* Set the architecture-specific signal trampoline recognition
   function for GDBARCH to SIGNAL_FRAME_P.  */
   function for GDBARCH to SIGNAL_FRAME_P.  */
 
 
extern void
extern void
  dwarf2_frame_set_signal_frame_p (struct gdbarch *gdbarch,
  dwarf2_frame_set_signal_frame_p (struct gdbarch *gdbarch,
                                   int (*signal_frame_p) (struct gdbarch *,
                                   int (*signal_frame_p) (struct gdbarch *,
                                                          struct frame_info *));
                                                          struct frame_info *));
 
 
/* Set the architecture-specific adjustment of .eh_frame and .debug_frame
/* Set the architecture-specific adjustment of .eh_frame and .debug_frame
   register numbers.  */
   register numbers.  */
 
 
extern void
extern void
  dwarf2_frame_set_adjust_regnum (struct gdbarch *gdbarch,
  dwarf2_frame_set_adjust_regnum (struct gdbarch *gdbarch,
                                  int (*adjust_regnum) (struct gdbarch *,
                                  int (*adjust_regnum) (struct gdbarch *,
                                                        int, int));
                                                        int, int));
 
 
/* Return the frame unwind methods for the function that contains PC,
/* Return the frame unwind methods for the function that contains PC,
   or NULL if it can't be handled by DWARF CFI frame unwinder.  */
   or NULL if it can't be handled by DWARF CFI frame unwinder.  */
 
 
extern const struct frame_unwind *
extern const struct frame_unwind *
  dwarf2_frame_sniffer (struct frame_info *next_frame);
  dwarf2_frame_sniffer (struct frame_info *next_frame);
 
 
/* Return the frame base methods for the function that contains PC, or
/* 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.  */
   NULL if it can't be handled by the DWARF CFI frame unwinder.  */
 
 
extern const struct frame_base *
extern const struct frame_base *
  dwarf2_frame_base_sniffer (struct frame_info *next_frame);
  dwarf2_frame_base_sniffer (struct frame_info *next_frame);
 
 
/* Register the DWARF CFI for OBJFILE.  */
/* Register the DWARF CFI for OBJFILE.  */
 
 
void dwarf2_frame_build_info (struct objfile *objfile);
void dwarf2_frame_build_info (struct objfile *objfile);
 
 
#endif /* dwarf2-frame.h */
#endif /* dwarf2-frame.h */
 
 

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