OpenCores
URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [gnu-old/] [gdb-6.8/] [gdb/] [dwarf2-frame.h] - Blame information for rev 853

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 24 jeremybenn
/* Frame unwinder for frames with DWARF Call Frame Information.
2
 
3
   Copyright (C) 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
4
 
5
   Contributed by Mark Kettenis.
6
 
7
   This file is part of GDB.
8
 
9
   This program is free software; you can redistribute it and/or modify
10
   it under the terms of the GNU General Public License as published by
11
   the Free Software Foundation; either version 3 of the License, or
12
   (at your option) any later version.
13
 
14
   This program is distributed in the hope that it will be useful,
15
   but WITHOUT ANY WARRANTY; without even the implied warranty of
16
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17
   GNU General Public License for more details.
18
 
19
   You should have received a copy of the GNU General Public License
20
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
21
 
22
#ifndef DWARF2_FRAME_H
23
#define DWARF2_FRAME_H 1
24
 
25
struct gdbarch;
26
struct objfile;
27
struct frame_info;
28
 
29
/* Register rule.  */
30
 
31
enum dwarf2_frame_reg_rule
32
{
33
  /* Make certain that 0 maps onto the correct enum value; the
34
     corresponding structure is being initialized using memset zero.
35
     This indicates that CFI didn't provide any information at all
36
     about a register, leaving how to obtain its value totally
37
     unspecified.  */
38
  DWARF2_FRAME_REG_UNSPECIFIED = 0,
39
 
40
  /* The term "undefined" comes from the DWARF2 CFI spec which this
41
     code is moddeling; it indicates that the register's value is
42
     "undefined".  GCC uses the less formal term "unsaved".  Its
43
     definition is a combination of REG_UNDEFINED and REG_UNSPECIFIED.
44
     The failure to differentiate the two helps explain a few problems
45
     with the CFI generated by GCC.  */
46
  DWARF2_FRAME_REG_UNDEFINED,
47
  DWARF2_FRAME_REG_SAVED_OFFSET,
48
  DWARF2_FRAME_REG_SAVED_REG,
49
  DWARF2_FRAME_REG_SAVED_EXP,
50
  DWARF2_FRAME_REG_SAME_VALUE,
51
 
52
  /* These are defined in Dwarf3.  */
53
  DWARF2_FRAME_REG_SAVED_VAL_OFFSET,
54
  DWARF2_FRAME_REG_SAVED_VAL_EXP,
55
 
56
  /* These aren't defined by the DWARF2 CFI specification, but are
57
     used internally by GDB.  */
58
  DWARF2_FRAME_REG_RA,          /* Return Address.  */
59
  DWARF2_FRAME_REG_RA_OFFSET,   /* Return Address with offset.  */
60
  DWARF2_FRAME_REG_CFA,         /* Call Frame Address.  */
61
  DWARF2_FRAME_REG_CFA_OFFSET   /* Call Frame Address with offset.  */
62
};
63
 
64
/* Register state.  */
65
 
66
struct dwarf2_frame_state_reg
67
{
68
  /* Each register save state can be described in terms of a CFA slot,
69
     another register, or a location expression.  */
70
  union {
71
    LONGEST offset;
72
    ULONGEST reg;
73
    unsigned char *exp;
74
  } loc;
75
  ULONGEST exp_len;
76
  enum dwarf2_frame_reg_rule how;
77
};
78
 
79
/* Set the architecture-specific register state initialization
80
   function for GDBARCH to INIT_REG.  */
81
 
82
extern void dwarf2_frame_set_init_reg (struct gdbarch *gdbarch,
83
                                       void (*init_reg) (struct gdbarch *, int,
84
                                             struct dwarf2_frame_state_reg *,
85
                                             struct frame_info *));
86
 
87
/* Set the architecture-specific signal trampoline recognition
88
   function for GDBARCH to SIGNAL_FRAME_P.  */
89
 
90
extern void
91
  dwarf2_frame_set_signal_frame_p (struct gdbarch *gdbarch,
92
                                   int (*signal_frame_p) (struct gdbarch *,
93
                                                          struct frame_info *));
94
 
95
/* Set the architecture-specific adjustment of .eh_frame and .debug_frame
96
   register numbers.  */
97
 
98
extern void
99
  dwarf2_frame_set_adjust_regnum (struct gdbarch *gdbarch,
100
                                  int (*adjust_regnum) (struct gdbarch *,
101
                                                        int, int));
102
 
103
/* Return the frame unwind methods for the function that contains PC,
104
   or NULL if it can't be handled by DWARF CFI frame unwinder.  */
105
 
106
extern const struct frame_unwind *
107
  dwarf2_frame_sniffer (struct frame_info *next_frame);
108
 
109
/* Return the frame base methods for the function that contains PC, or
110
   NULL if it can't be handled by the DWARF CFI frame unwinder.  */
111
 
112
extern const struct frame_base *
113
  dwarf2_frame_base_sniffer (struct frame_info *next_frame);
114
 
115
/* Register the DWARF CFI for OBJFILE.  */
116
 
117
void dwarf2_frame_build_info (struct objfile *objfile);
118
 
119
#endif /* dwarf2-frame.h */

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.