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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [unwind-dw2.h] - Blame information for rev 816

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/* DWARF2 frame unwind data structure.
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   Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003
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   Free Software Foundation, Inc.
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   This file is part of GCC.
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   GCC is free software; you can redistribute it and/or modify it
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   under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 2, or (at your option)
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   any later version.
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   In addition to the permissions in the GNU General Public License, the
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   Free Software Foundation gives you unlimited permission to link the
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   compiled version of this file into combinations with other programs,
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   and to distribute those combinations without any restriction coming
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   from the use of this file.  (The General Public License restrictions
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   do apply in other respects; for example, they cover modification of
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   the file, and distribution when not linked into a combined
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   executable.)
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   GCC is distributed in the hope that it will be useful, but WITHOUT
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   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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   or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
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   License for more details.
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   You should have received a copy of the GNU General Public License
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   along with GCC; see the file COPYING.  If not, write to the Free
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   Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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   02110-1301, USA.  */
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/* A target can override (perhaps for backward compatibility) how
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   many dwarf2 columns are unwound.  */
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#ifndef DWARF_FRAME_REGISTERS
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#define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
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#endif
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/* The result of interpreting the frame unwind info for a frame.
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   This is all symbolic at this point, as none of the values can
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   be resolved until the target pc is located.  */
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typedef struct
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{
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  /* Each register save state can be described in terms of a CFA slot,
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     another register, or a location expression.  */
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  struct frame_state_reg_info
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  {
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    struct {
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      union {
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        _Unwind_Word reg;
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        _Unwind_Sword offset;
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        const unsigned char *exp;
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      } loc;
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      enum {
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        REG_UNSAVED,
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        REG_SAVED_OFFSET,
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        REG_SAVED_REG,
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        REG_SAVED_EXP,
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        REG_SAVED_VAL_OFFSET,
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        REG_SAVED_VAL_EXP
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      } how;
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    } reg[DWARF_FRAME_REGISTERS+1];
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    /* Used to implement DW_CFA_remember_state.  */
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    struct frame_state_reg_info *prev;
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  } regs;
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  /* The CFA can be described in terms of a reg+offset or a
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     location expression.  */
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  _Unwind_Sword cfa_offset;
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  _Unwind_Word cfa_reg;
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  const unsigned char *cfa_exp;
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  enum {
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    CFA_UNSET,
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    CFA_REG_OFFSET,
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    CFA_EXP
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  } cfa_how;
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  /* The PC described by the current frame state.  */
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  void *pc;
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  /* The information we care about from the CIE/FDE.  */
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  _Unwind_Personality_Fn personality;
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  _Unwind_Sword data_align;
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  _Unwind_Word code_align;
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  _Unwind_Word retaddr_column;
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  unsigned char fde_encoding;
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  unsigned char lsda_encoding;
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  unsigned char saw_z;
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  unsigned char signal_frame;
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  void *eh_ptr;
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} _Unwind_FrameState;
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