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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [unwind-dw2.h] - Blame information for rev 280

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1 280 jeremybenn
/* DWARF2 frame unwind data structure.
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   Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2009
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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 3, or (at your option)
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   any later version.
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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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   Under Section 7 of GPL version 3, you are granted additional
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   permissions described in the GCC Runtime Library Exception, version
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   3.1, as published by the Free Software Foundation.
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   You should have received a copy of the GNU General Public License and
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   a copy of the GCC Runtime Library Exception along with this program;
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   see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
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   <http://www.gnu.org/licenses/>.  */
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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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        REG_UNDEFINED
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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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    /* 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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  } regs;
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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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