| /* DWARF2 frame unwind data structure. |
| Copyright (C) 1997-2023 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/>. */ |
| |
| enum { |
| REG_UNSAVED, |
| REG_SAVED_OFFSET, |
| REG_SAVED_REG, |
| REG_SAVED_EXP, |
| REG_SAVED_VAL_OFFSET, |
| REG_SAVED_VAL_EXP, |
| REG_UNSAVED_ARCHEXT, /* Target specific extension. */ |
| REG_UNDEFINED |
| }; |
| |
| /* 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; |
| } reg[__LIBGCC_DWARF_FRAME_REGISTERS__+1]; |
| unsigned char how[__LIBGCC_DWARF_FRAME_REGISTERS__+1]; |
| |
| enum { |
| CFA_UNSET, |
| CFA_REG_OFFSET, |
| CFA_EXP |
| } cfa_how : 8; |
| |
| /* 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; |
| } 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; |
| |