1 /* Definitions for dealing with stack frames, for GDB, the GNU debugger.
2 Copyright 1986, 1989, 1991, 1992, 1999 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 #if !defined (FRAME_H)
24 /* Describe the saved registers of a frame. */
26 #if defined (EXTRA_FRAME_INFO) || defined (FRAME_FIND_SAVED_REGS)
27 /* XXXX - deprecated */
28 struct frame_saved_regs
30 /* For each register R (except the SP), regs[R] is the address at
31 which it was saved on entry to the frame, or zero if it was not
32 saved on entry to this frame. This includes special registers
33 such as pc and fp saved in special ways in the stack frame.
35 regs[SP_REGNUM] is different. It holds the actual SP, not the
36 address at which it was saved. */
38 CORE_ADDR regs
[NUM_REGS
];
42 /* We keep a cache of stack frames, each of which is a "struct
43 frame_info". The innermost one gets allocated (in
44 wait_for_inferior) each time the inferior stops; current_frame
45 points to it. Additional frames get allocated (in
46 get_prev_frame) as needed, and are chained through the next
47 and prev fields. Any time that the frame cache becomes invalid
48 (most notably when we execute something, but also if we change how
49 we interpret the frames (e.g. "set heuristic-fence-post" in
50 mips-tdep.c, or anything which reads new symbols)), we should call
51 reinit_frame_cache. */
55 /* Nominal address of the frame described. See comments at FRAME_FP
56 about what this means outside the *FRAME* macros; in the *FRAME*
57 macros, it can mean whatever makes most sense for this machine. */
60 /* Address at which execution is occurring in this frame.
61 For the innermost frame, it's the current pc.
62 For other frames, it is a pc saved in the next frame. */
65 /* Nonzero if this is a frame associated with calling a signal handler.
67 Set by machine-dependent code. On some machines, if
68 the machine-dependent code fails to check for this, the backtrace
69 will look relatively normal. For example, on the i386
70 #3 0x158728 in sighold ()
71 On other machines (e.g. rs6000), the machine-dependent code better
72 set this to prevent us from trying to print it like a normal frame. */
73 int signal_handler_caller
;
75 /* For each register, address of where it was saved on entry to
76 the frame, or zero if it was not saved on entry to this frame.
77 This includes special registers such as pc and fp saved in
78 special ways in the stack frame. The SP_REGNUM is even more
79 special, the address here is the sp for the next frame, not the
80 address where the sp was saved. */
81 /* Allocated by frame_saved_regs_zalloc () which is called /
82 initialized by FRAME_INIT_SAVED_REGS(). */
83 CORE_ADDR
*saved_regs
; /*NUM_REGS */
85 #ifdef EXTRA_FRAME_INFO
86 /* XXXX - deprecated */
87 /* Anything extra for this structure that may have been defined
88 in the machine dependent files. */
92 /* Anything extra for this structure that may have been defined
93 in the machine dependent files. */
94 /* Allocated by frame_obstack_alloc () which is called /
95 initialized by INIT_EXTRA_FRAME_INFO */
96 struct frame_extra_info
*extra_info
;
98 /* Pointers to the next and previous frame_info's in the frame cache. */
99 struct frame_info
*next
, *prev
;
102 /* Allocate additional space for appendices to a struct frame_info. */
104 #ifndef SIZEOF_FRAME_SAVED_REGS
105 #define SIZEOF_FRAME_SAVED_REGS (sizeof (CORE_ADDR) * (NUM_REGS))
107 extern void *frame_obstack_alloc
PARAMS ((unsigned long size
));
108 extern void frame_saved_regs_zalloc
PARAMS ((struct frame_info
*));
110 /* Return the frame address from FR. Except in the machine-dependent
111 *FRAME* macros, a frame address has no defined meaning other than
112 as a magic cookie which identifies a frame over calls to the
113 inferior. The only known exception is inferior.h
114 (PC_IN_CALL_DUMMY) [ON_STACK]; see comments there. You cannot
115 assume that a frame address contains enough information to
116 reconstruct the frame; if you want more than just to identify the
117 frame (e.g. be able to fetch variables relative to that frame),
118 then save the whole struct frame_info (and the next struct
119 frame_info, since the latter is used for fetching variables on some
122 #define FRAME_FP(fi) ((fi)->frame)
124 /* Define a default FRAME_CHAIN_VALID, in the form that is suitable for most
125 targets. If FRAME_CHAIN_VALID returns zero it means that the given frame
126 is the outermost one and has no caller.
128 If a particular target needs a different definition, then it can override
129 the definition here by providing one in the tm file.
131 XXXX - both default and alternate frame_chain_valid functions are
132 deprecated. New code should use dummy frames and one of the
133 generic functions. */
135 extern int file_frame_chain_valid (CORE_ADDR
, struct frame_info
*);
136 extern int func_frame_chain_valid (CORE_ADDR
, struct frame_info
*);
137 extern int nonnull_frame_chain_valid
PARAMS ((CORE_ADDR
, struct frame_info
*));
138 extern int generic_file_frame_chain_valid (CORE_ADDR
, struct frame_info
*);
139 extern int generic_func_frame_chain_valid (CORE_ADDR
, struct frame_info
*);
140 extern void generic_save_dummy_frame_tos
PARAMS ((CORE_ADDR sp
));
142 #if !defined (FRAME_CHAIN_VALID)
143 #if !defined (FRAME_CHAIN_VALID_ALTERNATE)
144 #define FRAME_CHAIN_VALID(chain, thisframe) file_frame_chain_valid (chain, thisframe)
146 /* Use the alternate method of avoiding running up off the end of the frame
147 chain or following frames back into the startup code. See the comments
149 #define FRAME_CHAIN_VALID(chain, thisframe) func_frame_chain_valid (chain,thisframe)
150 #endif /* FRAME_CHAIN_VALID_ALTERNATE */
151 #endif /* FRAME_CHAIN_VALID */
153 /* The stack frame that the user has specified for commands to act on.
154 Note that one cannot assume this is the address of valid data. */
156 extern struct frame_info
*selected_frame
;
158 /* Level of the selected frame:
159 0 for innermost, 1 for its caller, ...
160 or -1 for frame specified by address with no defined level. */
162 extern int selected_frame_level
;
164 extern struct frame_info
*create_new_frame
PARAMS ((CORE_ADDR
, CORE_ADDR
));
166 extern void flush_cached_frames
PARAMS ((void));
168 extern void reinit_frame_cache
PARAMS ((void));
171 #ifdef FRAME_FIND_SAVED_REGS
172 /* XXX - deprecated */
173 #define FRAME_INIT_SAVED_REGS(FI) get_frame_saved_regs (FI, NULL)
174 extern void get_frame_saved_regs
PARAMS ((struct frame_info
*,
175 struct frame_saved_regs
*));
178 extern void set_current_frame
PARAMS ((struct frame_info
*));
180 extern struct frame_info
*get_prev_frame
PARAMS ((struct frame_info
*));
182 extern struct frame_info
*get_current_frame
PARAMS ((void));
184 extern struct frame_info
*get_next_frame
PARAMS ((struct frame_info
*));
186 extern struct block
*get_frame_block
PARAMS ((struct frame_info
*));
188 extern struct block
*get_current_block
PARAMS ((void));
190 extern struct block
*get_selected_block
PARAMS ((void));
192 extern struct symbol
*get_frame_function
PARAMS ((struct frame_info
*));
194 extern CORE_ADDR get_frame_pc
PARAMS ((struct frame_info
*));
196 extern CORE_ADDR get_pc_function_start
PARAMS ((CORE_ADDR
));
198 extern struct block
*block_for_pc
PARAMS ((CORE_ADDR
));
200 extern struct block
*block_for_pc_sect
PARAMS ((CORE_ADDR
, asection
*));
202 extern int frameless_look_for_prologue
PARAMS ((struct frame_info
*));
204 extern void print_frame_args
PARAMS ((struct symbol
*, struct frame_info
*,
207 extern struct frame_info
*find_relative_frame
PARAMS ((struct frame_info
*, int *));
209 extern void show_and_print_stack_frame
PARAMS ((struct frame_info
* fi
, int level
, int source
));
211 extern void print_stack_frame
PARAMS ((struct frame_info
*, int, int));
213 extern void print_only_stack_frame
PARAMS ((struct frame_info
*, int, int));
215 extern void show_stack_frame
PARAMS ((struct frame_info
*));
217 extern void select_frame
PARAMS ((struct frame_info
*, int));
219 extern void record_selected_frame
PARAMS ((CORE_ADDR
*, int *));
221 extern void select_and_print_frame
PARAMS ((struct frame_info
*, int));
223 extern void print_frame_info
PARAMS ((struct frame_info
*, int, int, int));
225 extern void show_frame_info
PARAMS ((struct frame_info
*, int, int, int));
227 extern CORE_ADDR find_saved_register
PARAMS ((struct frame_info
*, int));
229 extern struct frame_info
*block_innermost_frame
PARAMS ((struct block
*));
231 extern struct frame_info
*find_frame_addr_in_frame_chain
PARAMS ((CORE_ADDR
));
233 extern CORE_ADDR sigtramp_saved_pc
PARAMS ((struct frame_info
*));
235 extern CORE_ADDR generic_read_register_dummy
PARAMS ((CORE_ADDR pc
,
238 extern void generic_push_dummy_frame
PARAMS ((void));
239 extern void generic_pop_current_frame
PARAMS ((void (*)(struct frame_info
*)));
240 extern void generic_pop_dummy_frame
PARAMS ((void));
242 extern int generic_pc_in_call_dummy
PARAMS ((CORE_ADDR pc
,
245 extern char *generic_find_dummy_frame
PARAMS ((CORE_ADDR pc
,
248 extern void generic_fix_call_dummy
PARAMS ((char *dummy
, CORE_ADDR pc
, CORE_ADDR fun
,
249 int nargs
, struct value
** args
,
250 struct type
* type
, int gcc_p
));
252 extern void generic_get_saved_register
PARAMS ((char *, int *, CORE_ADDR
*, struct frame_info
*, int, enum lval_type
*));
254 #endif /* !defined (FRAME_H) */