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Diffstat (limited to 'libgcc/unwind-dw2.h')
-rw-r--r-- | libgcc/unwind-dw2.h | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/libgcc/unwind-dw2.h b/libgcc/unwind-dw2.h new file mode 100644 index 0000000..2c558b4 --- /dev/null +++ b/libgcc/unwind-dw2.h @@ -0,0 +1,87 @@ +/* DWARF2 frame unwind data structure. + Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2009 + Free Software Foundation, Inc. + + This file is part of GCC. + + GCC 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 3, or (at your option) + any later version. + + GCC 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. + + Under Section 7 of GPL version 3, you are granted additional + permissions described in the GCC Runtime Library Exception, version + 3.1, as published by the Free Software Foundation. + + You should have received a copy of the GNU General Public License and + a copy of the GCC Runtime Library Exception along with this program; + see the files COPYING3 and COPYING.RUNTIME respectively. If not, see + <http://www.gnu.org/licenses/>. */ + +/* A target can override (perhaps for backward compatibility) how + many dwarf2 columns are unwound. */ +#ifndef DWARF_FRAME_REGISTERS +#define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER +#endif + +/* The result of interpreting the frame unwind info for a frame. + This is all symbolic at this point, as none of the values can + be resolved until the target pc is located. */ +typedef struct +{ + /* Each register save state can be described in terms of a CFA slot, + another register, or a location expression. */ + struct frame_state_reg_info + { + struct { + union { + _Unwind_Word reg; + _Unwind_Sword offset; + const unsigned char *exp; + } loc; + enum { + REG_UNSAVED, + REG_SAVED_OFFSET, + REG_SAVED_REG, + REG_SAVED_EXP, + REG_SAVED_VAL_OFFSET, + REG_SAVED_VAL_EXP, + REG_UNDEFINED + } how; + } reg[DWARF_FRAME_REGISTERS+1]; + + /* Used to implement DW_CFA_remember_state. */ + struct frame_state_reg_info *prev; + + /* The CFA can be described in terms of a reg+offset or a + location expression. */ + _Unwind_Sword cfa_offset; + _Unwind_Word cfa_reg; + const unsigned char *cfa_exp; + enum { + CFA_UNSET, + CFA_REG_OFFSET, + CFA_EXP + } cfa_how; + } regs; + + /* The PC described by the current frame state. */ + void *pc; + + /* The information we care about from the CIE/FDE. */ + _Unwind_Personality_Fn personality; + _Unwind_Sword data_align; + _Unwind_Word code_align; + _Unwind_Word retaddr_column; + unsigned char fde_encoding; + unsigned char lsda_encoding; + unsigned char saw_z; + unsigned char signal_frame; + void *eh_ptr; +} _Unwind_FrameState; + |