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authorJohn Gilmore <gnu@cygnus>1990-09-05 17:54:31 +0000
committerJohn Gilmore <gnu@cygnus>1990-09-05 17:54:31 +0000
commit831c851165e112139af1265f294e198401814c1f (patch)
tree5f155fecb9b690be9c428e822d519c2710fefd47 /gdb/frame.h
parent7a67dd45ca1c191a0220697a3ec9fa92993caf8c (diff)
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-/* Definitions for dealing with stack frames, for GDB, the GNU debugger.
- Copyright (C) 1986, 1989 Free Software Foundation, Inc.
-
-This file is part of GDB.
-
-GDB 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 1, or (at your option)
-any later version.
-
-GDB 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 GDB; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-/* Note that frame.h requires param.h! */
-
-/*
- * FRAME is the type of the identifier of a specific stack frame. It
- * is a pointer to the frame cache item corresponding to this frame.
- * Please note that frame id's are *not* constant over calls to the
- * inferior. Use frame addresses, which are.
- *
- * FRAME_ADDR is the type of the address of a specific frame. I
- * cannot imagine a case in which this would not be CORE_ADDR, so
- * maybe it's silly to give it it's own type. Life's rough.
- *
- * FRAME_FP is a macro which converts from a frame identifier into a
- * frame_address.
- *
- * FRAME_INFO_ID is a macro which "converts" from a frame info pointer
- * to a frame id. This is here in case I or someone else decides to
- * change the FRAME type again.
- *
- * This file and blockframe.c are the only places which are allowed to
- * use the equivalence between FRAME and struct frame_info *. EXCEPTION:
- * value.h uses CORE_ADDR instead of FRAME_ADDR because the compiler
- * will accept that in the absense of this file.
- */
-typedef struct frame_info *FRAME;
-typedef CORE_ADDR FRAME_ADDR;
-#define FRAME_FP(fr) ((fr)->frame)
-#define FRAME_INFO_ID(f) (f)
-
-/*
- * Caching structure for stack frames. This is also the structure
- * used for extended info about stack frames. May add more to this
- * structure as it becomes necessary.
- *
- * Note that the first entry in the cache will always refer to the
- * innermost executing frame. This value should be set (is it?
- * Check) in something like normal_stop.
- */
-struct frame_info
- {
- /* Nominal address of the frame described. */
- FRAME_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.
- This may be set even if there isn't a frame called by the one
- we are describing (.->next == 0); in that case it is simply the
- bottom of this frame */
- FRAME_ADDR next_frame;
- /* Anything extra for this structure that may have been defined
- in the machine depedent files. */
-#ifdef EXTRA_FRAME_INFO
- EXTRA_FRAME_INFO
-#endif
- /* Pointers to the next and previous frame_info's in this stack. */
- FRAME next, prev;
- };
-
-/* 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. */
- CORE_ADDR regs[NUM_REGS];
- };
-
-/* 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 *get_frame_info ();
-extern struct frame_info *get_prev_frame_info ();
-
-extern FRAME create_new_frame ();
-
-extern void get_frame_saved_regs ();
-
-extern FRAME get_prev_frame ();
-extern FRAME get_current_frame ();
-extern FRAME get_next_frame ();
-
-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 ();
-
-/* In stack.c */
-extern FRAME find_relative_frame ();
-
-/* Generic pointer value indicating "I don't know." */
-#define Frame_unknown (CORE_ADDR)-1