File: dw2gencfi.h

package info (click to toggle)
binutils 2.24.90.20141014-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental
  • size: 223,720 kB
  • sloc: ansic: 1,320,112; asm: 552,010; cpp: 110,351; exp: 58,197; makefile: 51,941; sh: 19,773; yacc: 14,696; lisp: 14,000; perl: 1,791; lex: 1,612; pascal: 307; sed: 195; python: 154; awk: 26
file content (132 lines) | stat: -rw-r--r-- 3,393 bytes parent folder | download | duplicates (5)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
/* dw2gencfi.h - Support for generating Dwarf2 CFI information.
   Copyright (C) 2003-2014 Free Software Foundation, Inc.
   Contributed by Michal Ludvig <mludvig@suse.cz>

   This file is part of GAS, the GNU Assembler.

   GAS 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.

   GAS 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.

   You should have received a copy of the GNU General Public License
   along with GAS; see the file COPYING.  If not, write to the Free
   Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
   02110-1301, USA.  */

#ifndef DW2GENCFI_H
#define DW2GENCFI_H

#include "dwarf2.h"

struct symbol;

extern const pseudo_typeS cfi_pseudo_table[];

/* cfi_finish() is called at the end of file. It will complain if
   the last CFI wasn't properly closed by .cfi_endproc.  */
extern void cfi_finish (void);

/* Entry points for backends to add unwind information.  */
extern void cfi_new_fde (struct symbol *);
extern void cfi_end_fde (struct symbol *);
extern void cfi_set_return_column (unsigned);
extern void cfi_add_advance_loc (struct symbol *);

extern void cfi_add_CFA_offset (unsigned, offsetT);
extern void cfi_add_CFA_def_cfa (unsigned, offsetT);
extern void cfi_add_CFA_register (unsigned, unsigned);
extern void cfi_add_CFA_def_cfa_register (unsigned);
extern void cfi_add_CFA_def_cfa_offset (offsetT);
extern void cfi_add_CFA_restore (unsigned);
extern void cfi_add_CFA_undefined (unsigned);
extern void cfi_add_CFA_same_value (unsigned);
extern void cfi_add_CFA_remember_state (void);
extern void cfi_add_CFA_restore_state (void);

/* Structures for md_cfi_end.  */

#if defined (TE_PE) || defined (TE_PEP)
#define SUPPORT_FRAME_LINKONCE 1
#else
#define SUPPORT_FRAME_LINKONCE 0
#endif

struct cfi_insn_data
{
  struct cfi_insn_data *next;
#if SUPPORT_FRAME_LINKONCE
  segT cur_seg;
#endif
  int insn;
  union
  {
    struct
    {
      unsigned reg;
      offsetT offset;
    } ri;

    struct
    {
      unsigned reg1;
      unsigned reg2;
    } rr;

    unsigned r;
    offsetT i;

    struct
    {
      symbolS *lab1;
      symbolS *lab2;
    } ll;

    struct cfi_escape_data *esc;

    struct
    {
      unsigned reg, encoding;
      expressionS exp;
    } ea;
  } u;
};

struct fde_entry
{
  struct fde_entry *next;
#if SUPPORT_FRAME_LINKONCE
  segT cur_seg;
#endif
  symbolS *start_address;
  symbolS *end_address;
  struct cfi_insn_data *data;
  struct cfi_insn_data **last;
  unsigned char per_encoding;
  unsigned char lsda_encoding;
  expressionS personality;
  expressionS lsda;
  unsigned int return_column;
  unsigned int signal_frame;
#if SUPPORT_FRAME_LINKONCE
  int handled;
#endif
};

/* The list of all FDEs that have been collected.  */
extern struct fde_entry *all_fde_data;

/* Fake CFI type; outside the byte range of any real CFI insn.  */
#define CFI_adjust_cfa_offset	0x100
#define CFI_return_column	0x101
#define CFI_rel_offset		0x102
#define CFI_escape		0x103
#define CFI_signal_frame	0x104
#define CFI_val_encoded_addr	0x105

#endif /* DW2GENCFI_H */