1 /* dw2gencfi.h - Support for generating Dwarf2 CFI information. 2 Copyright (C) 2003-2014 Free Software Foundation, Inc. 3 Contributed by Michal Ludvig <mludvig (at) suse.cz> 4 5 This file is part of GAS, the GNU Assembler. 6 7 GAS is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3, or (at your option) 10 any later version. 11 12 GAS is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with GAS; see the file COPYING. If not, write to the Free 19 Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA 20 02110-1301, USA. */ 21 22 #ifndef DW2GENCFI_H 23 #define DW2GENCFI_H 24 25 #include "dwarf2.h" 26 27 struct symbol; 28 29 extern const pseudo_typeS cfi_pseudo_table[]; 30 31 /* cfi_finish() is called at the end of file. It will complain if 32 the last CFI wasn't properly closed by .cfi_endproc. */ 33 extern void cfi_finish (void); 34 35 /* Entry points for backends to add unwind information. */ 36 extern void cfi_new_fde (struct symbol *); 37 extern void cfi_end_fde (struct symbol *); 38 extern void cfi_set_return_column (unsigned); 39 extern void cfi_add_advance_loc (struct symbol *); 40 41 extern void cfi_add_CFA_offset (unsigned, offsetT); 42 extern void cfi_add_CFA_def_cfa (unsigned, offsetT); 43 extern void cfi_add_CFA_register (unsigned, unsigned); 44 extern void cfi_add_CFA_def_cfa_register (unsigned); 45 extern void cfi_add_CFA_def_cfa_offset (offsetT); 46 extern void cfi_add_CFA_restore (unsigned); 47 extern void cfi_add_CFA_undefined (unsigned); 48 extern void cfi_add_CFA_same_value (unsigned); 49 extern void cfi_add_CFA_remember_state (void); 50 extern void cfi_add_CFA_restore_state (void); 51 52 /* Structures for md_cfi_end. */ 53 54 #if defined (TE_PE) || defined (TE_PEP) 55 #define SUPPORT_FRAME_LINKONCE 1 56 #else 57 #define SUPPORT_FRAME_LINKONCE 0 58 #endif 59 60 struct cfi_insn_data 61 { 62 struct cfi_insn_data *next; 63 #if SUPPORT_FRAME_LINKONCE 64 segT cur_seg; 65 #endif 66 int insn; 67 union 68 { 69 struct 70 { 71 unsigned reg; 72 offsetT offset; 73 } ri; 74 75 struct 76 { 77 unsigned reg1; 78 unsigned reg2; 79 } rr; 80 81 unsigned r; 82 offsetT i; 83 84 struct 85 { 86 symbolS *lab1; 87 symbolS *lab2; 88 } ll; 89 90 struct cfi_escape_data *esc; 91 92 struct 93 { 94 unsigned reg, encoding; 95 expressionS exp; 96 } ea; 97 } u; 98 }; 99 100 struct fde_entry 101 { 102 struct fde_entry *next; 103 #if SUPPORT_FRAME_LINKONCE 104 segT cur_seg; 105 #endif 106 symbolS *start_address; 107 symbolS *end_address; 108 struct cfi_insn_data *data; 109 struct cfi_insn_data **last; 110 unsigned char per_encoding; 111 unsigned char lsda_encoding; 112 expressionS personality; 113 expressionS lsda; 114 unsigned int return_column; 115 unsigned int signal_frame; 116 #if SUPPORT_FRAME_LINKONCE 117 int handled; 118 #endif 119 }; 120 121 /* The list of all FDEs that have been collected. */ 122 extern struct fde_entry *all_fde_data; 123 124 /* Fake CFI type; outside the byte range of any real CFI insn. */ 125 #define CFI_adjust_cfa_offset 0x100 126 #define CFI_return_column 0x101 127 #define CFI_rel_offset 0x102 128 #define CFI_escape 0x103 129 #define CFI_signal_frame 0x104 130 #define CFI_val_encoded_addr 0x105 131 132 #endif /* DW2GENCFI_H */ 133
