Commit | Line | Data |
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54cfded0 | 1 | /* dw2gencfi.h - Support for generating Dwarf2 CFI information. |
219d1afa | 2 | Copyright (C) 2003-2018 Free Software Foundation, Inc. |
54cfded0 AM |
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 | |
ec2655a6 | 9 | the Free Software Foundation; either version 3, or (at your option) |
54cfded0 AM |
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 | |
4b4da160 NC |
19 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
20 | 02110-1301, USA. */ | |
54cfded0 AM |
21 | |
22 | #ifndef DW2GENCFI_H | |
23 | #define DW2GENCFI_H | |
24 | ||
fa8f86ff | 25 | #include "dwarf2.h" |
54cfded0 | 26 | |
a4447b93 | 27 | struct symbol; |
54cfded0 AM |
28 | |
29 | extern const pseudo_typeS cfi_pseudo_table[]; | |
30 | ||
54cfded0 AM |
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. */ | |
a4447b93 RH |
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); | |
2f0c68f2 | 39 | extern void cfi_set_sections (void); |
a4447b93 | 40 | extern void cfi_add_advance_loc (struct symbol *); |
69602580 | 41 | extern void cfi_add_label (const char *); |
2be24b54 | 42 | |
a4447b93 | 43 | extern void cfi_add_CFA_offset (unsigned, offsetT); |
084303b8 | 44 | extern void cfi_add_CFA_val_offset (unsigned, offsetT); |
a4447b93 RH |
45 | extern void cfi_add_CFA_def_cfa (unsigned, offsetT); |
46 | extern void cfi_add_CFA_register (unsigned, unsigned); | |
47 | extern void cfi_add_CFA_def_cfa_register (unsigned); | |
48 | extern void cfi_add_CFA_def_cfa_offset (offsetT); | |
2be24b54 ML |
49 | extern void cfi_add_CFA_restore (unsigned); |
50 | extern void cfi_add_CFA_undefined (unsigned); | |
51 | extern void cfi_add_CFA_same_value (unsigned); | |
52 | extern void cfi_add_CFA_remember_state (void); | |
53 | extern void cfi_add_CFA_restore_state (void); | |
54cfded0 | 54 | |
1bce6bd8 PB |
55 | /* Structures for md_cfi_end. */ |
56 | ||
57 | #if defined (TE_PE) || defined (TE_PEP) | |
58 | #define SUPPORT_FRAME_LINKONCE 1 | |
59 | #else | |
60 | #define SUPPORT_FRAME_LINKONCE 0 | |
61 | #endif | |
62 | ||
2f0c68f2 CM |
63 | #ifdef tc_cfi_reloc_for_encoding |
64 | #define SUPPORT_COMPACT_EH 1 | |
65 | #else | |
66 | #define SUPPORT_COMPACT_EH 0 | |
67 | #endif | |
68 | ||
69 | #define MULTIPLE_FRAME_SECTIONS (SUPPORT_FRAME_LINKONCE || SUPPORT_COMPACT_EH) | |
70 | ||
1bce6bd8 PB |
71 | struct cfi_insn_data |
72 | { | |
73 | struct cfi_insn_data *next; | |
2f0c68f2 | 74 | #if MULTIPLE_FRAME_SECTIONS |
1bce6bd8 PB |
75 | segT cur_seg; |
76 | #endif | |
77 | int insn; | |
78 | union | |
79 | { | |
80 | struct | |
81 | { | |
82 | unsigned reg; | |
83 | offsetT offset; | |
84 | } ri; | |
85 | ||
86 | struct | |
87 | { | |
88 | unsigned reg1; | |
89 | unsigned reg2; | |
90 | } rr; | |
91 | ||
92 | unsigned r; | |
93 | offsetT i; | |
94 | ||
95 | struct | |
96 | { | |
97 | symbolS *lab1; | |
98 | symbolS *lab2; | |
99 | } ll; | |
100 | ||
101 | struct cfi_escape_data *esc; | |
102 | ||
103 | struct | |
104 | { | |
105 | unsigned reg, encoding; | |
106 | expressionS exp; | |
107 | } ea; | |
69602580 JB |
108 | |
109 | const char *sym_name; | |
1bce6bd8 PB |
110 | } u; |
111 | }; | |
112 | ||
2f0c68f2 CM |
113 | /* An enumeration describing the Compact EH header format. The least |
114 | significant bit is used to distinguish the entries. | |
115 | ||
116 | Inline Compact: Function offset [0] | |
117 | Four chars of unwind data. | |
118 | Out-of-line Compact: Function offset [1] | |
119 | Compact unwind data offset [0] | |
120 | Legacy: Function offset [1] | |
121 | Unwind data offset [1] | |
122 | ||
123 | The header type is initialized to EH_COMPACT_UNKNOWN until the | |
124 | format is discovered by encountering a .fde_data entry. | |
125 | Failure to find a .fde_data entry will cause an EH_COMPACT_LEGACY | |
126 | header to be generated. */ | |
127 | ||
128 | enum { | |
129 | EH_COMPACT_UNKNOWN, | |
130 | EH_COMPACT_LEGACY, | |
131 | EH_COMPACT_INLINE, | |
132 | EH_COMPACT_OUTLINE, | |
133 | EH_COMPACT_OUTLINE_DONE, | |
134 | /* Outline if .cfi_inline_lsda used, otherwise legacy FDE. */ | |
135 | EH_COMPACT_HAS_LSDA | |
136 | }; | |
137 | ||
3a67e1a6 ST |
138 | /* Stack of old CFI data, for save/restore. */ |
139 | struct cfa_save_data | |
140 | { | |
141 | struct cfa_save_data *next; | |
142 | offsetT cfa_offset; | |
143 | }; | |
144 | ||
145 | /* Current open FDE entry. */ | |
146 | struct frch_cfi_data | |
147 | { | |
148 | struct fde_entry *cur_fde_data; | |
149 | symbolS *last_address; | |
150 | offsetT cur_cfa_offset; | |
151 | struct cfa_save_data *cfa_save_stack; | |
152 | }; | |
153 | ||
1bce6bd8 PB |
154 | struct fde_entry |
155 | { | |
156 | struct fde_entry *next; | |
2f0c68f2 | 157 | #if MULTIPLE_FRAME_SECTIONS |
1bce6bd8 PB |
158 | segT cur_seg; |
159 | #endif | |
160 | symbolS *start_address; | |
161 | symbolS *end_address; | |
162 | struct cfi_insn_data *data; | |
163 | struct cfi_insn_data **last; | |
164 | unsigned char per_encoding; | |
165 | unsigned char lsda_encoding; | |
2f0c68f2 | 166 | int personality_id; |
1bce6bd8 PB |
167 | expressionS personality; |
168 | expressionS lsda; | |
169 | unsigned int return_column; | |
170 | unsigned int signal_frame; | |
2f0c68f2 | 171 | #if MULTIPLE_FRAME_SECTIONS |
1bce6bd8 PB |
172 | int handled; |
173 | #endif | |
2f0c68f2 CM |
174 | int eh_header_type; |
175 | /* Compact unwinding opcodes, not including the PR byte or LSDA. */ | |
176 | int eh_data_size; | |
177 | bfd_byte *eh_data; | |
178 | /* For out of line tables and FDEs. */ | |
179 | symbolS *eh_loc; | |
180 | int sections; | |
09038062 ST |
181 | #ifdef tc_fde_entry_extras |
182 | tc_fde_entry_extras | |
183 | #endif | |
1bce6bd8 PB |
184 | }; |
185 | ||
af385746 RH |
186 | /* The list of all FDEs that have been collected. */ |
187 | extern struct fde_entry *all_fde_data; | |
188 | ||
1bce6bd8 PB |
189 | /* Fake CFI type; outside the byte range of any real CFI insn. */ |
190 | #define CFI_adjust_cfa_offset 0x100 | |
191 | #define CFI_return_column 0x101 | |
192 | #define CFI_rel_offset 0x102 | |
193 | #define CFI_escape 0x103 | |
194 | #define CFI_signal_frame 0x104 | |
195 | #define CFI_val_encoded_addr 0x105 | |
69602580 | 196 | #define CFI_label 0x106 |
1bce6bd8 | 197 | |
2f0c68f2 CM |
198 | /* By default emit .eh_frame only, not .debug_frame. */ |
199 | #define CFI_EMIT_eh_frame (1 << 0) | |
200 | #define CFI_EMIT_debug_frame (1 << 1) | |
201 | #define CFI_EMIT_target (1 << 2) | |
202 | #define CFI_EMIT_eh_frame_compact (1 << 3) | |
203 | ||
54cfded0 | 204 | #endif /* DW2GENCFI_H */ |