| 1 | /* dw2gencfi.h - Support for generating Dwarf2 CFI information. |
| 2 | Copyright 2003, 2004, 2005, 2007, 2009 Free Software Foundation, Inc. |
| 3 | Contributed by Michal Ludvig <mludvig@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 */ |