1 /* Header file for unwinding stack frames for exception handling. */
2 /* Compile this one with gcc. */
3 /* Copyright (C) 1997, 1998, 1999 Free Software Foundation, Inc.
4 Contributed by Jason Merrill <jason@cygnus.com>.
6 This file is part of GNU CC.
8 GNU CC is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2, or (at your option)
13 GNU CC is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
24 #ifndef DWARF_FRAME_REGISTERS
25 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
28 typedef struct frame_state
34 long reg_or_offset
[DWARF_FRAME_REGISTERS
+1];
35 unsigned short cfa_reg
;
36 unsigned short retaddr_column
;
37 char saved
[DWARF_FRAME_REGISTERS
+1];
40 /* Values for 'saved' above. */
42 #define REG_SAVED_OFFSET 1
43 #define REG_SAVED_REG 2
45 /* The representation for an "object" to be searched for frame unwind info.
46 For targets with named sections, one object is an executable or shared
47 library; for other targets, one object is one translation unit.
49 A copy of this structure declaration is printed by collect2.c;
50 keep the copies synchronized! */
55 struct dwarf_fde
*fde_begin
;
56 struct dwarf_fde
**fde_array
;
61 /* Note the following routines are exported interfaces from libgcc; do not
62 change these interfaces. Instead create new interfaces. Also note
63 references to these functions may be made weak in files where they
66 extern void __register_frame (void * );
67 extern void __register_frame_table (void *);
68 extern void __deregister_frame (void *);
70 /* Called either from crtbegin.o or a static constructor to register the
71 unwind info for an object or translation unit, respectively. */
73 extern void __register_frame_info (void *, struct object
*);
75 /* Similar, but BEGIN is actually a pointer to a table of unwind entries
76 for different translation units. Called from the file generated by
78 extern void __register_frame_info_table (void *, struct object
*);
80 /* Called from crtend.o to deregister the unwind info for an object. */
82 extern void *__deregister_frame_info (void *);
84 /* Called from __throw to find the registers to restore for a given
85 PC_TARGET. The caller should allocate a local variable of `struct
86 frame_state' (declared in frame.h) and pass its address to STATE_IN.
87 Returns NULL on failure, otherwise returns STATE_IN. */
89 extern struct frame_state
*__frame_state_for (void *, struct frame_state
*);