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[binutils.git] / gas / dw2gencfi.h
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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>
5 This file is part of GAS, the GNU Assembler.
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.
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.
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. */
22 #ifndef DW2GENCFI_H
23 #define DW2GENCFI_H
25 #include "dwarf2.h"
27 struct symbol;
29 extern const pseudo_typeS cfi_pseudo_table[];
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);
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 *);
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);
52 /* Structures for md_cfi_end. */
54 #if defined (TE_PE) || defined (TE_PEP)
55 #define SUPPORT_FRAME_LINKONCE 1
56 #else
57 #define SUPPORT_FRAME_LINKONCE 0
58 #endif
60 struct cfi_insn_data
62 struct cfi_insn_data *next;
63 #if SUPPORT_FRAME_LINKONCE
64 segT cur_seg;
65 #endif
66 int insn;
67 union
69 struct
71 unsigned reg;
72 offsetT offset;
73 } ri;
75 struct
77 unsigned reg1;
78 unsigned reg2;
79 } rr;
81 unsigned r;
82 offsetT i;
84 struct
86 symbolS *lab1;
87 symbolS *lab2;
88 } ll;
90 struct cfi_escape_data *esc;
92 struct
94 unsigned reg, encoding;
95 expressionS exp;
96 } ea;
97 } u;
100 struct fde_entry
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
121 /* Fake CFI type; outside the byte range of any real CFI insn. */
122 #define CFI_adjust_cfa_offset 0x100
123 #define CFI_return_column 0x101
124 #define CFI_rel_offset 0x102
125 #define CFI_escape 0x103
126 #define CFI_signal_frame 0x104
127 #define CFI_val_encoded_addr 0x105
129 #endif /* DW2GENCFI_H */