/* Definitions for dealing with stack frames, for GDB, the GNU debugger.
- Copyright (C) 1986 Free Software Foundation, Inc.
+ Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1996, 1997,
+ 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
-GDB is distributed in the hope that it will be useful, but WITHOUT ANY
-WARRANTY. No author or distributor accepts responsibility to anyone
-for the consequences of using it or for whether it serves any
-particular purpose or works at all, unless he says so in writing.
-Refer to the GDB General Public License for full details.
+ This file is part of GDB.
-Everyone is granted permission to copy, modify and redistribute GDB,
-but only under the conditions described in the GDB General Public
-License. A copy of this license is supposed to have been given to you
-along with GDB so you can know your rights and responsibilities. It
-should be in a file named COPYING. Among other things, the copyright
-notice and this notice must be preserved on all copies.
+ 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.
-In other words, go ahead and share GDB, but don't try to stop
-anyone else from sharing it farther. Help stamp out software hoarding!
-*/
+ 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.
-/* Note that frame.h requires param.h! */
+ 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. */
-#define FRAME CORE_ADDR
+#if !defined (FRAME_H)
+#define FRAME_H 1
+
+/* Describe the saved registers of a frame. */
+
+#if defined (EXTRA_FRAME_INFO) || defined (FRAME_FIND_SAVED_REGS)
+/* XXXX - deprecated */
+struct frame_saved_regs
+ {
+ /* For each register R (except the SP), regs[R] is the address at
+ which 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.
+
+ regs[SP_REGNUM] is different. It holds the actual SP, not the
+ address at which it was saved. */
+
+ CORE_ADDR regs[NUM_REGS];
+ };
+#endif
+
+/* 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) 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. */
- FRAME frame;
+ /* 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;
- /* The frame called by the frame we are describing, or 0. */
- FRAME next_frame;
- };
-/* Describe the saved registers of a frame. */
+ /* Nonzero if this is a frame associated with calling a signal handler.
-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. */
- CORE_ADDR regs[NUM_REGS];
+ 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;
+
+ /* 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. */
+ /* Allocated by frame_saved_regs_zalloc () which is called /
+ initialized by FRAME_INIT_SAVED_REGS(). */
+ CORE_ADDR *saved_regs; /*NUM_REGS + NUM_PSEUDO_REGS*/
+
+#ifdef EXTRA_FRAME_INFO
+ /* XXXX - deprecated */
+ /* Anything extra for this structure that may have been defined
+ in the machine dependent files. */
+ EXTRA_FRAME_INFO
+#endif
+
+ /* Anything extra for this structure that may have been defined
+ in the machine dependent files. */
+ /* Allocated by frame_obstack_alloc () which is called /
+ initialized by INIT_EXTRA_FRAME_INFO */
+ struct frame_extra_info *extra_info;
+
+ /* Pointers to the next and previous frame_info's in the frame cache. */
+ struct frame_info *next, *prev;
+ };
+
+/* Values for the source flag to be used in print_frame_info_base(). */
+enum print_what
+ {
+ /* Print only the source line, like in stepi. */
+ SRC_LINE = -1,
+ /* Print only the location, i.e. level, address (sometimes)
+ function, args, file, line, line num. */
+ LOCATION,
+ /* Print both of the above. */
+ SRC_AND_LOC,
+ /* Print location only, but always include the address. */
+ LOC_AND_ADDRESS
};
+/* Allocate additional space for appendices to a struct frame_info.
+ NOTE: Much of GDB's code works on the assumption that the allocated
+ saved_regs[] array is the size specified below. If you try to make
+ that array smaller, GDB will happily walk off its end. */
+
+#ifdef SIZEOF_FRAME_SAVED_REGS
+#error "SIZEOF_FRAME_SAVED_REGS can not be re-defined"
+#endif
+#define SIZEOF_FRAME_SAVED_REGS \
+ (sizeof (CORE_ADDR) * (NUM_REGS+NUM_PSEUDO_REGS))
+
+extern void *frame_obstack_alloc (unsigned long size);
+extern void frame_saved_regs_zalloc (struct frame_info *);
+
+/* Return the frame address from FI. 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 dummy frames and one of the
+ generic functions. */
+
+extern int file_frame_chain_valid (CORE_ADDR, struct frame_info *);
+extern int func_frame_chain_valid (CORE_ADDR, struct frame_info *);
+extern int nonnull_frame_chain_valid (CORE_ADDR, struct frame_info *);
+extern int generic_file_frame_chain_valid (CORE_ADDR, struct frame_info *);
+extern int generic_func_frame_chain_valid (CORE_ADDR, struct frame_info *);
+extern void generic_save_dummy_frame_tos (CORE_ADDR sp);
+
+#if !defined (FRAME_CHAIN_VALID)
+#if !defined (FRAME_CHAIN_VALID_ALTERNATE)
+#define FRAME_CHAIN_VALID(chain, thisframe) file_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) func_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 FRAME selected_frame;
+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 *create_new_frame (CORE_ADDR, CORE_ADDR);
+
+extern void flush_cached_frames (void);
+
+extern void reinit_frame_cache (void);
+
+
+#ifdef FRAME_FIND_SAVED_REGS
+/* XXX - deprecated */
+#define FRAME_INIT_SAVED_REGS(FI) get_frame_saved_regs (FI, NULL)
+extern void get_frame_saved_regs (struct frame_info *,
+ struct frame_saved_regs *);
+#endif
+
+extern void set_current_frame (struct frame_info *);
+
+extern struct frame_info *get_prev_frame (struct frame_info *);
+
+extern struct frame_info *get_current_frame (void);
+
+extern struct frame_info *get_next_frame (struct frame_info *);
+
+extern struct block *get_frame_block (struct frame_info *);
+
+extern struct block *get_current_block (void);
+
+extern struct block *get_selected_block (void);
+
+extern struct symbol *get_frame_function (struct frame_info *);
+
+extern CORE_ADDR get_frame_pc (struct frame_info *);
+
+extern CORE_ADDR get_pc_function_start (CORE_ADDR);
+
+extern struct block *block_for_pc (CORE_ADDR);
+
+extern struct block *block_for_pc_sect (CORE_ADDR, asection *);
+
+extern int frameless_look_for_prologue (struct frame_info *);
+
+extern void print_frame_args (struct symbol *, struct frame_info *,
+ int, struct ui_file *);
+
+extern struct frame_info *find_relative_frame (struct frame_info *, int *);
+
+extern void show_and_print_stack_frame (struct frame_info *fi, int level,
+ int source);
+
+extern void print_stack_frame (struct frame_info *, int, int);
+
+extern void print_only_stack_frame (struct frame_info *, int, int);
+
+extern void show_stack_frame (struct frame_info *);
+
+extern void select_frame (struct frame_info *, int);
+
+extern void record_selected_frame (CORE_ADDR *, int *);
+
+extern void select_and_print_frame (struct frame_info *, int);
+
+extern void print_frame_info (struct frame_info *, int, int, int);
+
+extern void show_frame_info (struct frame_info *, int, int, int);
+
+extern CORE_ADDR find_saved_register (struct frame_info *, int);
+
+extern struct frame_info *block_innermost_frame (struct block *);
+
+extern struct frame_info *find_frame_addr_in_frame_chain (CORE_ADDR);
+
+extern CORE_ADDR sigtramp_saved_pc (struct frame_info *);
+
+extern CORE_ADDR generic_read_register_dummy (CORE_ADDR pc,
+ CORE_ADDR fp, int);
+extern void generic_push_dummy_frame (void);
+extern void generic_pop_current_frame (void (*)(struct frame_info *));
+extern void generic_pop_dummy_frame (void);
-extern struct frame_info get_frame_info ();
-extern struct frame_info get_prev_frame_info ();
+extern int generic_pc_in_call_dummy (CORE_ADDR pc,
+ CORE_ADDR sp, CORE_ADDR fp);
+extern char *generic_find_dummy_frame (CORE_ADDR pc, CORE_ADDR fp);
-extern void get_frame_saved_regs ();
+extern void generic_fix_call_dummy (char *dummy, CORE_ADDR pc, CORE_ADDR fun,
+ int nargs, struct value **args,
+ struct type *type, int gcc_p);
-extern FRAME get_prev_frame ();
+extern void generic_get_saved_register (char *, int *, CORE_ADDR *,
+ struct frame_info *, int,
+ enum lval_type *);
-extern FRAME get_current_frame ();
+extern void get_saved_register (char *raw_buffer, int *optimized,
+ CORE_ADDR * addrp,
+ struct frame_info *frame,
+ int regnum, enum lval_type *lval);
-extern struct block *get_frame_block ();
-extern struct block *get_current_block ();
-extern struct block *get_selected_block ();
-extern struct symbol *get_frame_function ();
-extern struct symbol *get_pc_function ();
+#endif /* !defined (FRAME_H) */
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