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authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:34:07 +0000
commit071ea11e85eb9d529cc5eb3d35f6247466a21b99 (patch)
tree5deda65b8d7b04d1f4cbc534c3206d328e1267ec /gdb/frame.h
parent1730ec6b1848f0f32154277f788fb29f88d8475b (diff)
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Initial creation of sourceware repository
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-/* Definitions for dealing with stack frames, for GDB, the GNU debugger.
- Copyright 1986, 1989, 1991, 1992 Free Software Foundation, Inc.
-
-This file is part of GDB.
-
-This program 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 2 of the License, or
-(at your option) any later version.
-
-This program 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 this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-#if !defined (FRAME_H)
-#define FRAME_H 1
-
-/* Describe the saved registers of a frame. */
-
-struct frame_saved_regs
- {
-
- /* For each register, address of where it was saved on entry to
- the frame, or zero if it was not saved on entry to this frame.
- This includes special registers such as pc and fp saved in
- special ways in the stack frame. The SP_REGNUM is even more
- special, the address here is the sp for the next frame, not the
- address where the sp was saved. */
-
- CORE_ADDR regs[NUM_REGS];
- };
-
-/* We keep a cache of stack frames, each of which is a "struct
- frame_info". The innermost one gets allocated (in
- wait_for_inferior) each time the inferior stops; current_frame
- points to it. Additional frames get allocated (in
- get_prev_frame_info) as needed, and are chained through the next
- and prev fields. Any time that the frame cache becomes invalid
- (most notably when we execute something, but also if we change how
- we interpret the frames (e.g. "set heuristic-fence-post" in
- mips-tdep.c, or anything which reads new symbols)), we should call
- reinit_frame_cache. */
-
-struct frame_info
- {
- /* Nominal address of the frame described. See comments at FRAME_FP
- about what this means outside the *FRAME* macros; in the *FRAME*
- macros, it can mean whatever makes most sense for this machine. */
- CORE_ADDR frame;
-
- /* Address at which execution is occurring in this frame.
- For the innermost frame, it's the current pc.
- For other frames, it is a pc saved in the next frame. */
- CORE_ADDR pc;
-
- /* Nonzero if this is a frame associated with calling a signal handler.
-
- Set by machine-dependent code. On some machines, if
- the machine-dependent code fails to check for this, the backtrace
- will look relatively normal. For example, on the i386
- #3 0x158728 in sighold ()
- On other machines (e.g. rs6000), the machine-dependent code better
- set this to prevent us from trying to print it like a normal frame. */
- int signal_handler_caller;
-
- /* Anything extra for this structure that may have been defined
- in the machine dependent files. */
-#ifdef EXTRA_FRAME_INFO
- EXTRA_FRAME_INFO
-#endif
-
- /* We should probably also store a "struct frame_saved_regs" here.
- This is already done by some machines (e.g. config/m88k/tm-m88k.h)
- but there is no reason it couldn't be general. */
-
- /* Pointers to the next and previous frame_info's in the frame cache. */
- struct frame_info *next, *prev;
- };
-
-/* Dummy frame. This saves the processor state just prior to setting up the
- inferior function call. On most targets, the registers are saved on the
- target stack, but that really slows down function calls. */
-
-struct dummy_frame
-{
- struct dummy_frame *next;
-
- CORE_ADDR pc;
- CORE_ADDR fp;
- CORE_ADDR sp;
- char regs[REGISTER_BYTES];
-};
-
-/* Return the frame address from FR. Except in the machine-dependent
- *FRAME* macros, a frame address has no defined meaning other than
- as a magic cookie which identifies a frame over calls to the
- inferior. The only known exception is inferior.h
- (PC_IN_CALL_DUMMY) [ON_STACK]; see comments there. You cannot
- assume that a frame address contains enough information to
- reconstruct the frame; if you want more than just to identify the
- frame (e.g. be able to fetch variables relative to that frame),
- then save the whole struct frame_info (and the next struct
- frame_info, since the latter is used for fetching variables on some
- machines). */
-
-#define FRAME_FP(fi) ((fi)->frame)
-
-/* Define a default FRAME_CHAIN_VALID, in the form that is suitable for most
- targets. If FRAME_CHAIN_VALID returns zero it means that the given frame
- is the outermost one and has no caller.
-
- If a particular target needs a different definition, then it can override
- the definition here by providing one in the tm file.
-
- XXXX - both default and alternate frame_chain_valid functions are
- deprecated. New code should use generic dummy frames. */
-
-extern int default_frame_chain_valid PARAMS ((CORE_ADDR, struct frame_info *));
-extern int alternate_frame_chain_valid PARAMS ((CORE_ADDR, struct frame_info *));
-extern int nonnull_frame_chain_valid PARAMS ((CORE_ADDR, struct frame_info *));
-extern int generic_frame_chain_valid PARAMS ((CORE_ADDR, struct frame_info *));
-
-#if !defined (FRAME_CHAIN_VALID)
-#if !defined (FRAME_CHAIN_VALID_ALTERNATE)
-#define FRAME_CHAIN_VALID(chain, thisframe) default_frame_chain_valid (chain, thisframe)
-#else
-/* Use the alternate method of avoiding running up off the end of the frame
- chain or following frames back into the startup code. See the comments
- in objfiles.h. */
-#define FRAME_CHAIN_VALID(chain, thisframe) alternate_frame_chain_valid (chain,thisframe)
-#endif /* FRAME_CHAIN_VALID_ALTERNATE */
-#endif /* FRAME_CHAIN_VALID */
-
-/* The stack frame that the user has specified for commands to act on.
- Note that one cannot assume this is the address of valid data. */
-
-extern struct frame_info *selected_frame;
-
-/* Level of the selected frame:
- 0 for innermost, 1 for its caller, ...
- or -1 for frame specified by address with no defined level. */
-
-extern int selected_frame_level;
-
-extern struct frame_info *get_prev_frame_info PARAMS ((struct frame_info *));
-
-extern struct frame_info *create_new_frame PARAMS ((CORE_ADDR, CORE_ADDR));
-
-extern void flush_cached_frames PARAMS ((void));
-
-extern void reinit_frame_cache PARAMS ((void));
-
-extern void get_frame_saved_regs PARAMS ((struct frame_info *,
- struct frame_saved_regs *));
-
-extern void set_current_frame PARAMS ((struct frame_info *));
-
-extern struct frame_info *get_prev_frame PARAMS ((struct frame_info *));
-
-extern struct frame_info *get_current_frame PARAMS ((void));
-
-extern struct frame_info *get_next_frame PARAMS ((struct frame_info *));
-
-extern struct block *get_frame_block PARAMS ((struct frame_info *));
-
-extern struct block *get_current_block PARAMS ((void));
-
-extern struct block *get_selected_block PARAMS ((void));
-
-extern struct symbol *get_frame_function PARAMS ((struct frame_info *));
-
-extern CORE_ADDR get_frame_pc PARAMS ((struct frame_info *));
-
-extern CORE_ADDR get_pc_function_start PARAMS ((CORE_ADDR));
-
-extern struct block * block_for_pc PARAMS ((CORE_ADDR));
-
-extern struct block * block_for_pc_sect PARAMS ((CORE_ADDR, asection *));
-
-extern int frameless_look_for_prologue PARAMS ((struct frame_info *));
-
-extern void print_frame_args PARAMS ((struct symbol *, struct frame_info *,
- int, GDB_FILE *));
-
-extern struct frame_info *find_relative_frame PARAMS ((struct frame_info *, int*));
-
-extern void print_stack_frame PARAMS ((struct frame_info *, int, int));
-
-extern void print_only_stack_frame PARAMS ((struct frame_info *, int, int));
-
-extern void show_stack_frame PARAMS ((struct frame_info *));
-
-extern void select_frame PARAMS ((struct frame_info *, int));
-
-extern void record_selected_frame PARAMS ((CORE_ADDR *, int *));
-
-extern void print_frame_info PARAMS ((struct frame_info *, int, int, int));
-
-extern void show_frame_info PARAMS ((struct frame_info *, int, int, int));
-
-extern CORE_ADDR find_saved_register PARAMS ((struct frame_info *, int));
-
-extern struct frame_info *block_innermost_frame PARAMS ((struct block *));
-
-extern struct frame_info *find_frame_addr_in_frame_chain PARAMS ((CORE_ADDR));
-
-extern CORE_ADDR sigtramp_saved_pc PARAMS ((struct frame_info *));
-
-extern CORE_ADDR generic_read_register_dummy PARAMS ((CORE_ADDR pc,
- CORE_ADDR fp,
- int));
-extern void generic_push_dummy_frame PARAMS ((void));
-extern void generic_pop_current_frame PARAMS ((void (*) (struct frame_info *)));
-extern void generic_pop_dummy_frame PARAMS ((void));
-
-extern int generic_pc_in_call_dummy PARAMS ((CORE_ADDR pc,
- CORE_ADDR fp));
-extern char * generic_find_dummy_frame PARAMS ((CORE_ADDR pc,
- CORE_ADDR fp));
-
-#ifdef __GNUC__
-/* Some native compilers, even ones that are supposed to be ANSI and for which __STDC__
- is true, complain about forward decls of enums. */
-enum lval_type;
-extern void generic_get_saved_register PARAMS ((char *, int *, CORE_ADDR *, struct frame_info *, int, enum lval_type *));
-#endif
-
-#endif /* !defined (FRAME_H) */