/* Definitions for dealing with stack frames, for GDB, the GNU debugger.
- Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1996, 1997,
- 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
+
+ Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1996,
+ 1997, 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
This file is part of GDB.
For other frames, it is a pc saved in the next frame. */
CORE_ADDR pc;
+ /* Level of this frame. The inner-most (youngest) frame is at
+ level 0. As you move towards the outer-most (oldest) frame,
+ the level increases. This is a cached value. It could just as
+ easily be computed by counting back from the selected frame to
+ the inner most frame. */
+ /* NOTE: cagney/2002-04-05: Perhaphs a level of ``-1'' should be
+ reserved to indicate a bogus frame - one that has been created
+ just to keep GDB happy (GDB always needs a frame). For the
+ moment leave this as speculation. */
+ int level;
+
/* Nonzero if this is a frame associated with calling a signal handler.
Set by machine-dependent code. On some machines, if
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. */
+ special, the address here is the sp for the previous 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 */
+ CORE_ADDR *saved_regs; /*NUM_REGS + NUM_PSEUDO_REGS*/
#ifdef EXTRA_FRAME_INFO
/* XXXX - deprecated */
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;
+ /* If dwarf2 unwind frame informations is used, this structure holds all
+ related unwind data. */
+ struct unwind_contect *context;
+
+ /* Pointers to the next (down, inner) and previous (up, outer)
+ frame_info's in the frame cache. */
+ struct frame_info *next; /* down, inner */
+ struct frame_info *prev; /* up, outer */
};
/* Values for the source flag to be used in print_frame_info_base(). */
LOC_AND_ADDRESS
};
-/* Allocate additional space for appendices to a struct frame_info. */
+/* 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. */
-#ifndef SIZEOF_FRAME_SAVED_REGS
-#define SIZEOF_FRAME_SAVED_REGS (sizeof (CORE_ADDR) * (NUM_REGS))
+#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 *);
#define FRAME_FP(fi) ((fi)->frame)
+/* Level of the frame: 0 for innermost, 1 for its caller, ...; or -1
+ for an invalid frame. */
+
+extern int frame_relative_level (struct frame_info *fi);
+
/* 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 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. */
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 struct frame_info *get_next_frame (struct frame_info *);
-extern struct block *get_frame_block (struct frame_info *);
+extern struct block *get_frame_block (struct frame_info *,
+ CORE_ADDR *addr_in_block);
-extern struct block *get_current_block (void);
+extern struct block *get_current_block (CORE_ADDR *addr_in_block);
-extern struct block *get_selected_block (void);
+extern struct block *get_selected_block (CORE_ADDR *addr_in_block);
extern struct symbol *get_frame_function (struct frame_info *);
extern void show_stack_frame (struct frame_info *);
-extern void select_frame (struct frame_info *, int);
+extern void select_frame (struct frame_info *);
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);
struct frame_info *, int,
enum lval_type *);
+extern void generic_save_call_dummy_addr (CORE_ADDR lo, CORE_ADDR hi);
+
extern void get_saved_register (char *raw_buffer, int *optimized,
CORE_ADDR * addrp,
struct frame_info *frame,
int regnum, enum lval_type *lval);
+/* Return the register as found on the FRAME. Return zero if the
+ register could not be found. */
+extern int frame_register_read (struct frame_info *frame, int regnum,
+ void *buf);
+
#endif /* !defined (FRAME_H) */
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