/* Definitions for dealing with stack frames, for GDB, the GNU debugger.
- Copyright 1986, 1989, 1991, 1992, 1999 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.
#if !defined (FRAME_H)
#define FRAME_H 1
+/* Return the location (and possibly value) of REGNUM for the previous
+ (older, up) frame. All parameters except VALUEP can be assumed to
+ be non NULL. When VALUEP is NULL, just the location of the
+ register should be returned.
+
+ UNWIND_CACHE is provided as mechanism for implementing a per-frame
+ local cache. It's initial value being NULL. Memory for that cache
+ should be allocated using frame_obstack_alloc().
+
+ Register window architectures (eg SPARC) should note that REGNUM
+ identifies the register for the previous frame. For instance, a
+ request for the value of "o1" for the previous frame would be found
+ in the register "i1" in this FRAME. */
+
+typedef void (frame_register_unwind_ftype) (struct frame_info *frame,
+ void **unwind_cache,
+ int regnum,
+ int *optimized,
+ enum lval_type *lvalp,
+ CORE_ADDR *addrp,
+ int *realnump,
+ void *valuep);
+
/* Describe the saved registers of a frame. */
#if defined (EXTRA_FRAME_INFO) || defined (FRAME_FIND_SAVED_REGS)
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 context *context;
+
+ /* See description above. Return the register value for the
+ previous frame. */
+ frame_register_unwind_ftype *register_unwind;
+ void *register_unwind_cache;
+
+ /* 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(). */
+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. */
+/* 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
-extern void *frame_obstack_alloc PARAMS ((unsigned long size));
-extern void frame_saved_regs_zalloc PARAMS ((struct frame_info *));
+#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 FR. Except in the machine-dependent
+/* 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
#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 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 PARAMS ((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 PARAMS ((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 */
+extern void generic_save_dummy_frame_tos (CORE_ADDR sp);
/* 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 PARAMS ((CORE_ADDR, CORE_ADDR));
+extern struct frame_info *create_new_frame (CORE_ADDR, CORE_ADDR);
-extern void flush_cached_frames PARAMS ((void));
+extern void flush_cached_frames (void);
-extern void reinit_frame_cache PARAMS ((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 PARAMS ((struct frame_info *,
- struct frame_saved_regs *));
+extern void get_frame_saved_regs (struct frame_info *,
+ struct frame_saved_regs *);
#endif
-extern void set_current_frame PARAMS ((struct frame_info *));
+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 *,
+ CORE_ADDR *addr_in_block);
+
+extern struct block *get_current_block (CORE_ADDR *addr_in_block);
+
+extern struct block *get_selected_block (CORE_ADDR *addr_in_block);
+
+extern struct symbol *get_frame_function (struct frame_info *);
+
+extern CORE_ADDR get_frame_pc (struct frame_info *);
+
+extern CORE_ADDR frame_address_in_block (struct frame_info *);
+
+extern CORE_ADDR get_pc_function_start (CORE_ADDR);
+
+extern struct block *block_for_pc (CORE_ADDR);
-extern struct frame_info *get_prev_frame PARAMS ((struct frame_info *));
+extern struct block *block_for_pc_sect (CORE_ADDR, asection *);
-extern struct frame_info *get_current_frame PARAMS ((void));
+extern int frameless_look_for_prologue (struct frame_info *);
-extern struct frame_info *get_next_frame PARAMS ((struct frame_info *));
+extern void print_frame_args (struct symbol *, struct frame_info *,
+ int, struct ui_file *);
-extern struct block *get_frame_block PARAMS ((struct frame_info *));
+extern struct frame_info *find_relative_frame (struct frame_info *, int *);
-extern struct block *get_current_block PARAMS ((void));
+extern void show_and_print_stack_frame (struct frame_info *fi, int level,
+ int source);
-extern struct block *get_selected_block PARAMS ((void));
+extern void print_stack_frame (struct frame_info *, int, int);
-extern struct symbol *get_frame_function PARAMS ((struct frame_info *));
+extern void print_only_stack_frame (struct frame_info *, int, int);
-extern CORE_ADDR get_frame_pc PARAMS ((struct frame_info *));
+extern void show_stack_frame (struct frame_info *);
-extern CORE_ADDR get_pc_function_start PARAMS ((CORE_ADDR));
+extern void select_frame (struct frame_info *);
-extern struct block *block_for_pc PARAMS ((CORE_ADDR));
+/* Return an ID that can be used to re-find a frame. */
-extern struct block *block_for_pc_sect PARAMS ((CORE_ADDR, asection *));
+struct frame_id
+{
+ /* The frame's address. This should be constant through out the
+ lifetime of a frame. */
+ CORE_ADDR base;
+ /* The frame's current PC. While this changes, the function that
+ the PC falls into, does not. */
+ CORE_ADDR pc;
+};
-extern int frameless_look_for_prologue PARAMS ((struct frame_info *));
+extern void get_frame_id (struct frame_info *fi, struct frame_id *id);
-extern void print_frame_args PARAMS ((struct symbol *, struct frame_info *,
- int, GDB_FILE *));
+extern struct frame_info *frame_find_by_id (struct frame_id id);
-extern struct frame_info *find_relative_frame PARAMS ((struct frame_info *, int *));
+extern void print_frame_info (struct frame_info *, int, int, int);
-extern void show_and_print_stack_frame PARAMS ((struct frame_info * fi, int level, int source));
+extern void show_frame_info (struct frame_info *, int, int, int);
-extern void print_stack_frame PARAMS ((struct frame_info *, int, int));
+extern CORE_ADDR find_saved_register (struct frame_info *, int);
-extern void print_only_stack_frame PARAMS ((struct frame_info *, int, int));
+extern struct frame_info *block_innermost_frame (struct block *);
-extern void show_stack_frame PARAMS ((struct frame_info *));
+extern struct frame_info *find_frame_addr_in_frame_chain (CORE_ADDR);
-extern void select_frame PARAMS ((struct frame_info *, int));
+extern CORE_ADDR sigtramp_saved_pc (struct frame_info *);
-extern void record_selected_frame PARAMS ((CORE_ADDR *, int *));
+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 void select_and_print_frame PARAMS ((struct frame_info *, int));
+extern int generic_pc_in_call_dummy (CORE_ADDR pc,
+ CORE_ADDR sp, CORE_ADDR fp);
-extern void print_frame_info PARAMS ((struct frame_info *, int, int, int));
+/* NOTE: cagney/2002-06-26: Targets should no longer use this
+ function. Instead, the contents of a dummy frames registers can be
+ obtained by applying: frame_register_unwind to the dummy frame; or
+ get_saved_register to the next outer frame. */
-extern void show_frame_info PARAMS ((struct frame_info *, int, int, int));
+extern char *deprecated_generic_find_dummy_frame (CORE_ADDR pc, CORE_ADDR fp);
-extern CORE_ADDR find_saved_register PARAMS ((struct frame_info *, int));
+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 struct frame_info *block_innermost_frame PARAMS ((struct block *));
+extern void generic_get_saved_register (char *, int *, CORE_ADDR *,
+ struct frame_info *, int,
+ enum lval_type *);
-extern struct frame_info *find_frame_addr_in_frame_chain PARAMS ((CORE_ADDR));
+extern void generic_unwind_get_saved_register (char *raw_buffer,
+ int *optimized,
+ CORE_ADDR * addrp,
+ struct frame_info *frame,
+ int regnum,
+ enum lval_type *lval);
-extern CORE_ADDR sigtramp_saved_pc PARAMS ((struct frame_info *));
+/* Unwind the stack frame so that the value of REGNUM, in the previous
+ frame is returned. If VALUEP is NULL, don't fetch/compute the
+ value. Instead just return the location of the value. */
-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 void frame_register_unwind (struct frame_info *frame, int regnum,
+ int *optimizedp, enum lval_type *lvalp,
+ CORE_ADDR *addrp, int *realnump,
+ void *valuep);
-extern int generic_pc_in_call_dummy PARAMS ((CORE_ADDR pc,
- CORE_ADDR sp,
- CORE_ADDR fp));
-extern char *generic_find_dummy_frame PARAMS ((CORE_ADDR pc,
- CORE_ADDR fp));
+extern void generic_save_call_dummy_addr (CORE_ADDR lo, CORE_ADDR hi);
-extern void generic_fix_call_dummy PARAMS ((char *dummy, CORE_ADDR pc, CORE_ADDR fun,
- int nargs, struct value ** args,
- struct type * type, int gcc_p));
+extern void get_saved_register (char *raw_buffer, int *optimized,
+ CORE_ADDR * addrp,
+ struct frame_info *frame,
+ int regnum, enum lval_type *lval);
-extern void generic_get_saved_register PARAMS ((char *, int *, CORE_ADDR *, struct frame_info *, int, enum lval_type *));
+/* 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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