116 lines
4.1 KiB
C
116 lines
4.1 KiB
C
/* Definitions for dealing with stack frames, for GDB, the GNU debugger.
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Copyright (C) 1986, 1989 Free Software Foundation, Inc.
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This file is part of GDB.
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GDB is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 1, or (at your option)
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any later version.
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GDB is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GDB; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* Note that frame.h requires param.h! */
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/*
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* FRAME is the type of the identifier of a specific stack frame. It
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* is a pointer to the frame cache item corresponding to this frame.
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* Please note that frame id's are *not* constant over calls to the
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* inferior. Use frame addresses, which are.
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*
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* FRAME_ADDR is the type of the address of a specific frame. I
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* cannot imagine a case in which this would not be CORE_ADDR, so
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* maybe it's silly to give it it's own type. Life's rough.
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*
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* FRAME_FP is a macro which converts from a frame identifier into a
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* frame_address.
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*
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* FRAME_INFO_ID is a macro which "converts" from a frame info pointer
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* to a frame id. This is here in case I or someone else decides to
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* change the FRAME type again.
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*
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* This file and blockframe.c are the only places which are allowed to
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* use the equivalence between FRAME and struct frame_info *. EXCEPTION:
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* value.h uses CORE_ADDR instead of FRAME_ADDR because the compiler
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* will accept that in the absense of this file.
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*/
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typedef struct frame_info *FRAME;
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typedef CORE_ADDR FRAME_ADDR;
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#define FRAME_FP(fr) ((fr)->frame)
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#define FRAME_INFO_ID(f) (f)
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/*
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* Caching structure for stack frames. This is also the structure
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* used for extended info about stack frames. May add more to this
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* structure as it becomes necessary.
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*
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* Note that the first entry in the cache will always refer to the
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* innermost executing frame. This value should be set (is it?
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* Check) in something like normal_stop.
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*/
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struct frame_info
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{
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/* Nominal address of the frame described. */
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FRAME_ADDR frame;
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/* Address at which execution is occurring in this frame.
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For the innermost frame, it's the current pc.
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For other frames, it is a pc saved in the next frame. */
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CORE_ADDR pc;
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/* The frame called by the frame we are describing, or 0.
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This may be set even if there isn't a frame called by the one
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we are describing (.->next == 0); in that case it is simply the
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bottom of this frame */
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FRAME_ADDR next_frame;
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/* Anything extra for this structure that may have been defined
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in the machine depedent files. */
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#ifdef EXTRA_FRAME_INFO
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EXTRA_FRAME_INFO
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#endif
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/* Pointers to the next and previous frame_info's in this stack. */
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FRAME next, prev;
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};
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/* Describe the saved registers of a frame. */
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struct frame_saved_regs
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{
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/* For each register, address of where it was saved on entry to the frame,
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or zero if it was not saved on entry to this frame. */
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CORE_ADDR regs[NUM_REGS];
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};
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/* The stack frame that the user has specified for commands to act on.
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Note that one cannot assume this is the address of valid data. */
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extern FRAME selected_frame;
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extern struct frame_info *get_frame_info ();
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extern struct frame_info *get_prev_frame_info ();
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extern FRAME create_new_frame ();
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extern void get_frame_saved_regs ();
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extern FRAME get_prev_frame ();
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extern FRAME get_current_frame ();
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extern FRAME get_next_frame ();
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extern struct block *get_frame_block ();
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extern struct block *get_current_block ();
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extern struct block *get_selected_block ();
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extern struct symbol *get_frame_function ();
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extern struct symbol *get_pc_function ();
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/* In stack.c */
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extern FRAME find_relative_frame ();
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/* Generic pointer value indicating "I don't know." */
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#define Frame_unknown (CORE_ADDR)-1
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