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/tmp/gdb-7.10/gdb/trad-frame.h
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1 /* Traditional frame unwind support, for GDB the GNU Debugger.
2 
3  Copyright (C) 2003-2015 Free Software Foundation, Inc.
4 
5  This file is part of GDB.
6 
7  This program 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 of the License, or
10  (at your option) any later version.
11 
12  This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */
19 
20 #ifndef TRAD_FRAME_H
21 #define TRAD_FRAME_H
22 
23 #include "frame.h" /* For "struct frame_id". */
24 
25 struct frame_info;
26 struct trad_frame_cache;
27 
28 /* A simple, or traditional frame cache.
29 
30  The entire cache is populated in a single pass and then generic
31  routines are used to extract the various cache values. */
32 
34 
35 /* This frame's ID. */
36 void trad_frame_set_id (struct trad_frame_cache *this_trad_cache,
37  struct frame_id this_id);
38 void trad_frame_get_id (struct trad_frame_cache *this_trad_cache,
39  struct frame_id *this_id);
40 void trad_frame_set_this_base (struct trad_frame_cache *this_trad_cache,
42 CORE_ADDR trad_frame_get_this_base (struct trad_frame_cache *this_trad_cache);
43 
44 void trad_frame_set_reg_realreg (struct trad_frame_cache *this_trad_cache,
45  int regnum, int realreg);
46 void trad_frame_set_reg_addr (struct trad_frame_cache *this_trad_cache,
47  int regnum, CORE_ADDR addr);
48 void trad_frame_set_reg_value (struct trad_frame_cache *this_cache,
49  int regnum, LONGEST val);
50 
51 struct value *trad_frame_get_register (struct trad_frame_cache *this_trad_cache,
52  struct frame_info *this_frame,
53  int regnum);
54 
55 /* A traditional saved regs table, indexed by REGNUM, encoding where
56  the value of REGNUM for the previous frame can be found in this
57  frame.
58 
59  The table is initialized with an identity encoding (ADDR == -1,
60  REALREG == REGNUM) indicating that the value of REGNUM in the
61  previous frame can be found in register REGNUM (== REALREG) in this
62  frame.
63 
64  The initial encoding can then be changed:
65 
66  Modify ADDR (REALREG >= 0, ADDR != -1) to indicate that the value
67  of register REGNUM in the previous frame can be found in memory at
68  ADDR in this frame (addr_p, !realreg_p, !value_p).
69 
70  Modify REALREG (REALREG >= 0, ADDR == -1) to indicate that the
71  value of register REGNUM in the previous frame is found in register
72  REALREG in this frame (!addr_p, realreg_p, !value_p).
73 
74  Call trad_frame_set_value (REALREG == -1) to indicate that the
75  value of register REGNUM in the previous frame is found in ADDR
76  (!addr_p, !realreg_p, value_p).
77 
78  Call trad_frame_set_unknown (REALREG == -2) to indicate that the
79  register's value is not known. */
80 
82 {
83  LONGEST addr; /* A CORE_ADDR fits in a longest. */
84  int realreg;
85 };
86 
87 /* Encode REGNUM value in the trad-frame. */
88 void trad_frame_set_value (struct trad_frame_saved_reg this_saved_regs[],
89  int regnum, LONGEST val);
90 
91 /* Mark REGNUM as unknown. */
92 void trad_frame_set_unknown (struct trad_frame_saved_reg this_saved_regs[],
93  int regnum);
94 
95 /* Convenience functions, return non-zero if the register has been
96  encoded as specified. */
97 int trad_frame_value_p (struct trad_frame_saved_reg this_saved_regs[],
98  int regnum);
99 int trad_frame_addr_p (struct trad_frame_saved_reg this_saved_regs[],
100  int regnum);
101 int trad_frame_realreg_p (struct trad_frame_saved_reg this_saved_regs[],
102  int regnum);
103 
104 
105 /* Return a freshly allocated (and initialized) trad_frame array. */
107 
108 /* Given the trad_frame info, return the location of the specified
109  register. */
110 struct value *trad_frame_get_prev_register (struct frame_info *this_frame,
111  struct trad_frame_saved_reg this_saved_regs[],
112  int regnum);
113 
114 #endif
void trad_frame_set_reg_realreg(struct trad_frame_cache *this_trad_cache, int regnum, int realreg)
Definition: trad-frame.c:111
void trad_frame_set_id(struct trad_frame_cache *this_trad_cache, struct frame_id this_id)
Definition: trad-frame.c:164
void trad_frame_set_unknown(struct trad_frame_saved_reg this_saved_regs[], int regnum)
Definition: trad-frame.c:126
int trad_frame_addr_p(struct trad_frame_saved_reg this_saved_regs[], int regnum)
Definition: trad-frame.c:77
bfd_vma CORE_ADDR
Definition: common-types.h:41
int trad_frame_realreg_p(struct trad_frame_saved_reg this_saved_regs[], int regnum)
Definition: trad-frame.c:84
struct trad_frame_saved_reg * trad_frame_alloc_saved_regs(struct frame_info *)
Definition: trad-frame.c:52
CORE_ADDR trad_frame_get_this_base(struct trad_frame_cache *this_trad_cache)
Definition: trad-frame.c:185
CORE_ADDR this_base
Definition: trad-frame.c:30
int trad_frame_value_p(struct trad_frame_saved_reg this_saved_regs[], int regnum)
Definition: trad-frame.c:71
void trad_frame_set_value(struct trad_frame_saved_reg this_saved_regs[], int regnum, LONGEST val)
Definition: trad-frame.c:92
void trad_frame_get_id(struct trad_frame_cache *this_trad_cache, struct frame_id *this_id)
Definition: trad-frame.c:171
struct trad_frame_cache * trad_frame_cache_zalloc(struct frame_info *)
Definition: trad-frame.c:36
struct value * trad_frame_get_prev_register(struct frame_info *this_frame, struct trad_frame_saved_reg this_saved_regs[], int regnum)
Definition: trad-frame.c:135
void trad_frame_set_reg_value(struct trad_frame_cache *this_cache, int regnum, LONGEST val)
Definition: trad-frame.c:102
void trad_frame_set_this_base(struct trad_frame_cache *this_trad_cache, CORE_ADDR this_base)
Definition: trad-frame.c:178
int regnum
Definition: aarch64-tdep.c:69
Definition: value.c:172
struct frame_id this_id
Definition: trad-frame.c:32
struct value * trad_frame_get_register(struct trad_frame_cache *this_trad_cache, struct frame_info *this_frame, int regnum)
Definition: trad-frame.c:155
void trad_frame_set_reg_addr(struct trad_frame_cache *this_trad_cache, int regnum, CORE_ADDR addr)
Definition: trad-frame.c:119
long long LONGEST
Definition: common-types.h:52