48c6672556
* frame.h (struct frame_id): Add new field: special_addr.
(frame_id_build_special): New prototype.
* frame.c (frame_id_build_special): New function.
(frame_id_build): Change to call frame_id_build_special().
(frame_id_eq): Change to also test special_addr field.
(frame_id_inner): Update comment.
757 lines
32 KiB
C
757 lines
32 KiB
C
/* Definitions for dealing with stack frames, for GDB, the GNU debugger.
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Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1996,
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1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
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This file is part of GDB.
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This program 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 2 of the License, or
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(at your option) any later version.
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This program 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 this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#if !defined (FRAME_H)
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#define FRAME_H 1
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/* The following is the intended naming schema for frame functions.
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It isn't 100% consistent, but it is aproaching that. Frame naming
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schema:
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Prefixes:
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get_frame_WHAT...(): Get WHAT from the THIS frame (functionaly
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equivalent to THIS->next->unwind->what)
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frame_unwind_WHAT...(): Unwind THIS frame's WHAT from the NEXT
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frame.
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put_frame_WHAT...(): Put a value into this frame (unsafe, need to
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invalidate the frame / regcache afterwards) (better name more
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strongly hinting at its unsafeness)
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safe_....(): Safer version of various functions, doesn't throw an
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error (leave this for later?). Returns non-zero if the fetch
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succeeds. Return a freshly allocated error message?
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Suffixes:
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void /frame/_WHAT(): Read WHAT's value into the buffer parameter.
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ULONGEST /frame/_WHAT_unsigned(): Return an unsigned value (the
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alternative is *frame_unsigned_WHAT).
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LONGEST /frame/_WHAT_signed(): Return WHAT signed value.
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What:
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/frame/_memory* (frame, coreaddr, len [, buf]): Extract/return
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*memory.
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/frame/_register* (frame, regnum [, buf]): extract/return register.
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CORE_ADDR /frame/_{pc,sp,...} (frame): Resume address, innner most
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stack *address, ...
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*/
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struct symtab_and_line;
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struct frame_unwind;
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struct frame_base;
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struct block;
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struct gdbarch;
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struct ui_file;
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/* A legacy unwinder to prop up architectures using the old style
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saved regs array. */
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extern const struct frame_unwind *legacy_saved_regs_unwind;
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/* The frame object. */
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struct frame_info;
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/* The frame object's ID. This provides a per-frame unique identifier
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that can be used to relocate a `struct frame_info' after a target
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resume or a frame cache destruct. It of course assumes that the
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inferior hasn't unwound the stack past that frame. */
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struct frame_id
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{
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/* The frame's stack address. This shall be constant through out
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the lifetime of a frame. Note that this requirement applies to
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not just the function body, but also the prologue and (in theory
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at least) the epilogue. Since that value needs to fall either on
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the boundary, or within the frame's address range, the frame's
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outer-most address (the inner-most address of the previous frame)
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is used. Watch out for all the legacy targets that still use the
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function pointer register or stack pointer register. They are
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wrong. */
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CORE_ADDR stack_addr;
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/* The frame's code address. This shall be constant through out the
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lifetime of the frame. While the PC (a.k.a. resume address)
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changes as the function is executed, this code address cannot.
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Typically, it is set to the address of the entry point of the
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frame's function (as returned by frame_func_unwind(). */
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CORE_ADDR code_addr;
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/* The frame's special address. This shall be constant through out the
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lifetime of the frame. This is used for architectures that may have
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frames that do not change the stack but are still distinct and have
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some form of distinct identifier (e.g. the ia64 which uses a 2nd
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stack for registers). This field is treated as unordered - i.e. will
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not be used in frame ordering comparisons such as frame_id_inner().
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A zero in this field will be treated as a wild-card when comparing
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frames for equality. */
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CORE_ADDR special_addr;
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};
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/* Methods for constructing and comparing Frame IDs.
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NOTE: Given stackless functions A and B, where A calls B (and hence
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B is inner-to A). The relationships: !eq(A,B); !eq(B,A);
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!inner(A,B); !inner(B,A); all hold.
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This is because, while B is inner-to A, B is not strictly inner-to A.
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Being stackless, they have an identical .stack_addr value, and differ
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only by their unordered .code_addr and/or .special_addr values.
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Because frame_id_inner is only used as a safety net (e.g.,
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detect a corrupt stack) the lack of strictness is not a problem.
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Code needing to determine an exact relationship between two frames
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must instead use frame_id_eq and frame_id_unwind. For instance,
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in the above, to determine that A stepped-into B, the equation
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"A.id != B.id && A.id == id_unwind (B)" can be used. */
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/* For convenience. All fields are zero. */
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extern const struct frame_id null_frame_id;
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/* Construct a frame ID. The first parameter is the frame's constant
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stack address (typically the outer-bound), and the second the
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frame's constant code address (typically the entry point) (or zero,
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to indicate a wild card). The special identifier address is
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defaulted to zero. */
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extern struct frame_id frame_id_build (CORE_ADDR stack_addr,
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CORE_ADDR code_addr);
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/* Construct a special frame ID. The first parameter is the frame's constant
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stack address (typically the outer-bound), the second is the
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frame's constant code address (typically the entry point) (or zero,
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to indicate a wild card), and the third parameter is the frame's
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special identifier address (or zero to indicate a wild card or
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unused default). */
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extern struct frame_id frame_id_build_special (CORE_ADDR stack_addr,
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CORE_ADDR code_addr,
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CORE_ADDR special_addr);
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/* Returns non-zero when L is a valid frame (a valid frame has a
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non-zero .base). */
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extern int frame_id_p (struct frame_id l);
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/* Returns non-zero when L and R identify the same frame, or, if
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either L or R have a zero .func, then the same frame base. */
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extern int frame_id_eq (struct frame_id l, struct frame_id r);
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/* Returns non-zero when L is strictly inner-than R (they have
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different frame .bases). Neither L, nor R can be `null'. See note
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above about frameless functions. */
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extern int frame_id_inner (struct frame_id l, struct frame_id r);
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/* Write the internal representation of a frame ID on the specified
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stream. */
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extern void fprint_frame_id (struct ui_file *file, struct frame_id id);
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/* For every stopped thread, GDB tracks two frames: current and
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selected. Current frame is the inner most frame of the selected
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thread. Selected frame is the one being examined by the the GDB
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CLI (selected using `up', `down', ...). The frames are created
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on-demand (via get_prev_frame()) and then held in a frame cache. */
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/* FIXME: cagney/2002-11-28: Er, there is a lie here. If you do the
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sequence: `thread 1; up; thread 2; thread 1' you loose thread 1's
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selected frame. At present GDB only tracks the selected frame of
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the current thread. But be warned, that might change. */
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/* FIXME: cagney/2002-11-14: At any time, only one thread's selected
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and current frame can be active. Switching threads causes gdb to
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discard all that cached frame information. Ulgh! Instead, current
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and selected frame should be bound to a thread. */
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/* On demand, create the inner most frame using information found in
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the inferior. If the inner most frame can't be created, throw an
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error. */
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extern struct frame_info *get_current_frame (void);
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/* Invalidates the frame cache (this function should have been called
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invalidate_cached_frames).
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FIXME: cagney/2002-11-28: The only difference between
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flush_cached_frames() and reinit_frame_cache() is that the latter
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explicitly sets the selected frame back to the current frame there
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isn't any real difference (except that one delays the selection of
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a new frame). Code can instead simply rely on get_selected_frame()
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to reinit's the selected frame as needed. As for invalidating the
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cache, there should be two methods one that reverts the thread's
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selected frame back to current frame (for when the inferior
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resumes) and one that does not (for when the user modifies the
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target invalidating the frame cache). */
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extern void flush_cached_frames (void);
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extern void reinit_frame_cache (void);
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/* On demand, create the selected frame and then return it. If the
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selected frame can not be created, this function throws an error. */
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/* FIXME: cagney/2002-11-28: At present, when there is no selected
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frame, this function always returns the current (inner most) frame.
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It should instead, when a thread has previously had its frame
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selected (but not resumed) and the frame cache invalidated, find
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and then return that thread's previously selected frame. */
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extern struct frame_info *get_selected_frame (void);
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/* Select a specific frame. NULL, apparently implies re-select the
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inner most frame. */
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extern void select_frame (struct frame_info *);
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/* Given a FRAME, return the next (more inner, younger) or previous
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(more outer, older) frame. */
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extern struct frame_info *get_prev_frame (struct frame_info *);
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extern struct frame_info *get_next_frame (struct frame_info *);
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/* Given a FRAME, return the true next (more inner, younger) frame.
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This one exposes the sentinel frame and, hence, never returns NULL.
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It is here strictly to help old targets in their migration path to
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the new frame code - the new code requires the NEXT, and not THIS
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frame. */
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extern struct frame_info *deprecated_get_next_frame_hack (struct frame_info *);
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/* Given a frame's ID, relocate the frame. Returns NULL if the frame
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is not found. */
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extern struct frame_info *frame_find_by_id (struct frame_id id);
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/* Base attributes of a frame: */
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/* The frame's `resume' address. Where the program will resume in
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this frame.
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This replaced: frame->pc; */
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extern CORE_ADDR get_frame_pc (struct frame_info *);
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/* An address (not necessarily alligned to an instruction boundary)
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that falls within THIS frame's code block.
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When a function call is the last statement in a block, the return
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address for the call may land at the start of the next block.
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Similarly, if a no-return function call is the last statement in
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the function, the return address may end up pointing beyond the
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function, and possibly at the start of the next function.
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These methods make an allowance for this. For call frames, this
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function returns the frame's PC-1 which "should" be an address in
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the frame's block. */
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extern CORE_ADDR get_frame_address_in_block (struct frame_info *this_frame);
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extern CORE_ADDR frame_unwind_address_in_block (struct frame_info *next_frame);
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/* The frame's inner-most bound. AKA the stack-pointer. Confusingly
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known as top-of-stack. */
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extern CORE_ADDR get_frame_sp (struct frame_info *);
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extern CORE_ADDR frame_sp_unwind (struct frame_info *);
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/* Following on from the `resume' address. Return the entry point
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address of the function containing that resume address, or zero if
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that function isn't known. */
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extern CORE_ADDR frame_func_unwind (struct frame_info *fi);
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extern CORE_ADDR get_frame_func (struct frame_info *fi);
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/* Closely related to the resume address, various symbol table
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attributes that are determined by the PC. Note that for a normal
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frame, the PC refers to the resume address after the return, and
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not the call instruction. In such a case, the address is adjusted
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so that it (approximatly) identifies the call site (and not return
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site).
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NOTE: cagney/2002-11-28: The frame cache could be used to cache the
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computed value. Working on the assumption that the bottle-neck is
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in the single step code, and that code causes the frame cache to be
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constantly flushed, caching things in a frame is probably of little
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benefit. As they say `show us the numbers'.
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NOTE: cagney/2002-11-28: Plenty more where this one came from:
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find_frame_block(), find_frame_partial_function(),
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find_frame_symtab(), find_frame_function(). Each will need to be
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carefully considered to determine if the real intent was for it to
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apply to the PC or the adjusted PC. */
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extern void find_frame_sal (struct frame_info *frame,
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struct symtab_and_line *sal);
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/* Return the frame base (what ever that is) (DEPRECATED).
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Old code was trying to use this single method for two conflicting
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purposes. Such code needs to be updated to use either of:
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get_frame_id: A low level frame unique identifier, that consists of
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both a stack and a function address, that can be used to uniquely
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identify a frame. This value is determined by the frame's
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low-level unwinder, the stack part [typically] being the
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top-of-stack of the previous frame, and the function part being the
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function's start address. Since the correct identification of a
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frameless function requires both the a stack and function address,
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the old get_frame_base method was not sufficient.
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get_frame_base_address: get_frame_locals_address:
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get_frame_args_address: A set of high-level debug-info dependant
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addresses that fall within the frame. These addresses almost
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certainly will not match the stack address part of a frame ID (as
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returned by get_frame_base).
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This replaced: frame->frame; */
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extern CORE_ADDR get_frame_base (struct frame_info *);
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/* Return the per-frame unique identifer. Can be used to relocate a
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frame after a frame cache flush (and other similar operations). If
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FI is NULL, return the null_frame_id. */
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extern struct frame_id get_frame_id (struct frame_info *fi);
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/* Assuming that a frame is `normal', return its base-address, or 0 if
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the information isn't available. NOTE: This address is really only
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meaningful to the frame's high-level debug info. */
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extern CORE_ADDR get_frame_base_address (struct frame_info *);
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/* Assuming that a frame is `normal', return the base-address of the
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local variables, or 0 if the information isn't available. NOTE:
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This address is really only meaningful to the frame's high-level
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debug info. Typically, the argument and locals share a single
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base-address. */
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extern CORE_ADDR get_frame_locals_address (struct frame_info *);
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/* Assuming that a frame is `normal', return the base-address of the
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parameter list, or 0 if that information isn't available. NOTE:
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This address is really only meaningful to the frame's high-level
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debug info. Typically, the argument and locals share a single
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base-address. */
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extern CORE_ADDR get_frame_args_address (struct frame_info *);
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/* The frame's level: 0 for innermost, 1 for its caller, ...; or -1
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for an invalid frame). */
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extern int frame_relative_level (struct frame_info *fi);
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/* Return the frame's type. Some are real, some are signal
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trampolines, and some are completly artificial (dummy). */
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enum frame_type
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{
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/* The frame's type hasn't yet been defined. This is a catch-all
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for legacy code that uses really strange technicques, such as
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deprecated_set_frame_type, to set the frame's type. New code
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should not use this value. */
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UNKNOWN_FRAME,
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/* A true stack frame, created by the target program during normal
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execution. */
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NORMAL_FRAME,
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/* A fake frame, created by GDB when performing an inferior function
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call. */
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DUMMY_FRAME,
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/* In a signal handler, various OSs handle this in various ways.
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The main thing is that the frame may be far from normal. */
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SIGTRAMP_FRAME
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};
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extern enum frame_type get_frame_type (struct frame_info *);
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/* FIXME: cagney/2002-11-10: Some targets want to directly mark a
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frame as being of a specific type. This shouldn't be necessary.
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PC_IN_SIGTRAMP() indicates a SIGTRAMP_FRAME and
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DEPRECATED_PC_IN_CALL_DUMMY() indicates a DUMMY_FRAME. I suspect
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the real problem here is that get_prev_frame() only sets
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initialized after DEPRECATED_INIT_EXTRA_FRAME_INFO as been called.
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Consequently, some targets found that the frame's type was wrong
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and tried to fix it. The correct fix is to modify get_prev_frame()
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so that it initializes the frame's type before calling any other
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functions. */
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extern void deprecated_set_frame_type (struct frame_info *,
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enum frame_type type);
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/* Unwind the stack frame so that the value of REGNUM, in the previous
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(up, older) frame is returned. If VALUEP is NULL, don't
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fetch/compute the value. Instead just return the location of the
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value. */
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extern void frame_register_unwind (struct frame_info *frame, int regnum,
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int *optimizedp, enum lval_type *lvalp,
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CORE_ADDR *addrp, int *realnump,
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void *valuep);
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/* Fetch a register from this, or unwind a register from the next
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frame. Note that the get_frame methods are wrappers to
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frame->next->unwind. They all [potentially] throw an error if the
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fetch fails. */
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extern void frame_unwind_register (struct frame_info *frame,
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int regnum, void *buf);
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extern void get_frame_register (struct frame_info *frame,
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int regnum, void *buf);
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extern LONGEST frame_unwind_register_signed (struct frame_info *frame,
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int regnum);
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extern LONGEST get_frame_register_signed (struct frame_info *frame,
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int regnum);
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extern ULONGEST frame_unwind_register_unsigned (struct frame_info *frame,
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int regnum);
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extern ULONGEST get_frame_register_unsigned (struct frame_info *frame,
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int regnum);
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/* Use frame_unwind_register_signed. */
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extern void frame_unwind_signed_register (struct frame_info *frame,
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int regnum, LONGEST *val);
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/* Use frame_unwind_register_signed. */
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extern void frame_unwind_unsigned_register (struct frame_info *frame,
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int regnum, ULONGEST *val);
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/* Get the value of the register that belongs to this FRAME. This
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function is a wrapper to the call sequence ``frame_unwind_register
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(get_next_frame (FRAME))''. As per frame_register_unwind(), if
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VALUEP is NULL, the registers value is not fetched/computed. */
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extern void frame_register (struct frame_info *frame, int regnum,
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int *optimizedp, enum lval_type *lvalp,
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CORE_ADDR *addrp, int *realnump,
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void *valuep);
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/* The reverse. Store a register value relative to the specified
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frame. Note: this call makes the frame's state undefined. The
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register and frame caches must be flushed. */
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extern void put_frame_register (struct frame_info *frame, int regnum,
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const void *buf);
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/* Map between a frame register number and its name. A frame register
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space is a superset of the cooked register space --- it also
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includes builtin registers. If NAMELEN is negative, use the NAME's
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length when doing the comparison. */
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extern int frame_map_name_to_regnum (struct frame_info *frame,
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const char *name, int namelen);
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extern const char *frame_map_regnum_to_name (struct frame_info *frame,
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int regnum);
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/* Unwind the PC. Strictly speaking return the resume address of the
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calling frame. For GDB, `pc' is the resume address and not a
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specific register. */
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extern CORE_ADDR frame_pc_unwind (struct frame_info *frame);
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|
|
/* Discard the specified frame. Restoring the registers to the state
|
|
of the caller. */
|
|
extern void frame_pop (struct frame_info *frame);
|
|
|
|
/* Return memory from the specified frame. A frame knows its thread /
|
|
LWP and hence can find its way down to a target. The assumption
|
|
here is that the current and previous frame share a common address
|
|
space.
|
|
|
|
If the memory read fails, these methods throw an error.
|
|
|
|
NOTE: cagney/2003-06-03: Should there be unwind versions of these
|
|
methods? That isn't clear. Can code, for instance, assume that
|
|
this and the previous frame's memory or architecture are identical?
|
|
If architecture / memory changes are always separated by special
|
|
adaptor frames this should be ok. */
|
|
|
|
extern void get_frame_memory (struct frame_info *this_frame, CORE_ADDR addr,
|
|
void *buf, int len);
|
|
extern LONGEST get_frame_memory_signed (struct frame_info *this_frame,
|
|
CORE_ADDR memaddr, int len);
|
|
extern ULONGEST get_frame_memory_unsigned (struct frame_info *this_frame,
|
|
CORE_ADDR memaddr, int len);
|
|
|
|
/* Return this frame's architecture. */
|
|
|
|
extern struct gdbarch *get_frame_arch (struct frame_info *this_frame);
|
|
|
|
|
|
/* 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))
|
|
|
|
/* Allocate zero initialized memory from the frame cache obstack.
|
|
Appendices to the frame info (such as the unwind cache) should
|
|
allocate memory using this method. */
|
|
|
|
extern void *frame_obstack_zalloc (unsigned long size);
|
|
#define FRAME_OBSTACK_ZALLOC(TYPE) ((TYPE *) frame_obstack_zalloc (sizeof (TYPE)))
|
|
#define FRAME_OBSTACK_CALLOC(NUMBER,TYPE) ((TYPE *) frame_obstack_zalloc ((NUMBER) * sizeof (TYPE)))
|
|
|
|
/* If legacy_frame_chain_valid() returns zero it means that the given
|
|
frame is the outermost one and has no caller.
|
|
|
|
This method has been superseeded by the per-architecture
|
|
frame_unwind_pc() (returns 0 to indicate an invalid return address)
|
|
and per-frame this_id() (returns a NULL frame ID to indicate an
|
|
invalid frame). */
|
|
extern int legacy_frame_chain_valid (CORE_ADDR, struct frame_info *);
|
|
|
|
extern void generic_save_dummy_frame_tos (CORE_ADDR sp);
|
|
|
|
extern struct block *get_frame_block (struct frame_info *,
|
|
CORE_ADDR *addr_in_block);
|
|
|
|
/* Return the `struct block' that belongs to the selected thread's
|
|
selected frame. If the inferior has no state, return NULL.
|
|
|
|
NOTE: cagney/2002-11-29:
|
|
|
|
No state? Does the inferior have any execution state (a core file
|
|
does, an executable does not). At present the code tests
|
|
`target_has_stack' but I'm left wondering if it should test
|
|
`target_has_registers' or, even, a merged target_has_state.
|
|
|
|
Should it look at the most recently specified SAL? If the target
|
|
has no state, should this function try to extract a block from the
|
|
most recently selected SAL? That way `list foo' would give it some
|
|
sort of reference point. Then again, perhaphs that would confuse
|
|
things.
|
|
|
|
Calls to this function can be broken down into two categories: Code
|
|
that uses the selected block as an additional, but optional, data
|
|
point; Code that uses the selected block as a prop, when it should
|
|
have the relevant frame/block/pc explicitly passed in.
|
|
|
|
The latter can be eliminated by correctly parameterizing the code,
|
|
the former though is more interesting. Per the "address" command,
|
|
it occures in the CLI code and makes it possible for commands to
|
|
work, even when the inferior has no state. */
|
|
|
|
extern struct block *get_selected_block (CORE_ADDR *addr_in_block);
|
|
|
|
extern struct symbol *get_frame_function (struct frame_info *);
|
|
|
|
extern CORE_ADDR get_pc_function_start (CORE_ADDR);
|
|
|
|
extern int frameless_look_for_prologue (struct frame_info *);
|
|
|
|
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 show_stack_frame (struct frame_info *);
|
|
|
|
extern void print_frame_info (struct frame_info *, int, int, int);
|
|
|
|
extern void show_frame_info (struct frame_info *, int, int, int);
|
|
|
|
extern struct frame_info *block_innermost_frame (struct block *);
|
|
|
|
/* NOTE: cagney/2002-09-13: There is no need for this function.
|
|
Instead either of frame_unwind_signed_register() or
|
|
frame_unwind_unsigned_register() can be used. */
|
|
extern CORE_ADDR deprecated_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 int generic_pc_in_call_dummy (CORE_ADDR pc,
|
|
CORE_ADDR sp, CORE_ADDR fp);
|
|
|
|
/* 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
|
|
frame_register_unwind() to the next outer frame. */
|
|
|
|
extern char *deprecated_generic_find_dummy_frame (CORE_ADDR pc, CORE_ADDR fp);
|
|
|
|
|
|
/* The DEPRECATED_GET_SAVED_REGISTER architecture interface is
|
|
entirely redundant. New architectures should implement per-frame
|
|
unwinders (ref "frame-unwind.h"). */
|
|
extern void deprecated_generic_get_saved_register (char *, int *, CORE_ADDR *,
|
|
struct frame_info *, int,
|
|
enum lval_type *);
|
|
|
|
extern void generic_save_call_dummy_addr (CORE_ADDR lo, CORE_ADDR hi);
|
|
|
|
/* FIXME: cagney/2003-02-02: Should be deprecated or replaced with a
|
|
function called get_frame_register_p(). This slightly weird (and
|
|
older) variant of get_frame_register() returns zero (indicating the
|
|
register is unavailable) if either: the register isn't cached; or
|
|
the register has been optimized out. Problem is, neither check is
|
|
exactly correct. A register can't be optimized out (it may not
|
|
have been saved as part of a function call); The fact that a
|
|
register isn't in the register cache doesn't mean that the register
|
|
isn't available (it could have been fetched from memory). */
|
|
|
|
extern int frame_register_read (struct frame_info *frame, int regnum,
|
|
void *buf);
|
|
|
|
/* From stack.c. */
|
|
extern void args_info (char *, int);
|
|
|
|
extern void locals_info (char *, int);
|
|
|
|
extern void (*selected_frame_level_changed_hook) (int);
|
|
|
|
extern void return_command (char *, int);
|
|
|
|
|
|
/* NOTE: cagney/2002-11-27:
|
|
|
|
You might think that the below global can simply be replaced by a
|
|
call to either get_selected_frame() or select_frame().
|
|
|
|
Unfortunatly, it isn't that easy.
|
|
|
|
The relevant code needs to be audited to determine if it is
|
|
possible (or pratical) to instead pass the applicable frame in as a
|
|
parameter. For instance, DEPRECATED_DO_REGISTERS_INFO() relied on
|
|
the deprecated_selected_frame global, while its replacement,
|
|
PRINT_REGISTERS_INFO(), is parameterized with the selected frame.
|
|
The only real exceptions occure at the edge (in the CLI code) where
|
|
user commands need to pick up the selected frame before proceeding.
|
|
|
|
This is important. GDB is trying to stamp out the hack:
|
|
|
|
saved_frame = deprecated_selected_frame;
|
|
deprecated_selected_frame = ...;
|
|
hack_using_global_selected_frame ();
|
|
deprecated_selected_frame = saved_frame;
|
|
|
|
Take care! */
|
|
|
|
extern struct frame_info *deprecated_selected_frame;
|
|
|
|
/* NOTE: drow/2003-09-06:
|
|
|
|
This function is "a step sideways" for uses of deprecated_selected_frame.
|
|
They should be fixed as above, but meanwhile, we needed a solution for
|
|
cases where functions are called with a NULL frame meaning either "the
|
|
program is not running" or "use the selected frame". Lazy building of
|
|
deprecated_selected_frame confuses the situation, because now
|
|
deprecated_selected_frame can be NULL even when the inferior is running.
|
|
|
|
This function calls get_selected_frame if the inferior should have a
|
|
frame, or returns NULL otherwise. */
|
|
|
|
extern struct frame_info *deprecated_safe_get_selected_frame (void);
|
|
|
|
/* Create a frame using the specified BASE and PC. */
|
|
|
|
extern struct frame_info *create_new_frame (CORE_ADDR base, CORE_ADDR pc);
|
|
|
|
|
|
/* Create/access the frame's `extra info'. The extra info is used by
|
|
older code to store information such as the analyzed prologue. The
|
|
zalloc() should only be called by the INIT_EXTRA_INFO method. */
|
|
|
|
extern struct frame_extra_info *frame_extra_info_zalloc (struct frame_info *fi,
|
|
long size);
|
|
extern struct frame_extra_info *get_frame_extra_info (struct frame_info *fi);
|
|
|
|
/* Create/access the frame's `saved_regs'. The saved regs are used by
|
|
older code to store the address of each register (except for
|
|
SP_REGNUM where the value of the register in the previous frame is
|
|
stored). */
|
|
extern CORE_ADDR *frame_saved_regs_zalloc (struct frame_info *);
|
|
extern CORE_ADDR *deprecated_get_frame_saved_regs (struct frame_info *);
|
|
|
|
/* FIXME: cagney/2002-12-06: Has the PC in the current frame changed?
|
|
"infrun.c", Thanks to DECR_PC_AFTER_BREAK, can change the PC after
|
|
the initial frame create. This puts things back in sync.
|
|
|
|
This replaced: frame->pc = ....; */
|
|
extern void deprecated_update_frame_pc_hack (struct frame_info *frame,
|
|
CORE_ADDR pc);
|
|
|
|
/* FIXME: cagney/2002-12-18: Has the frame's base changed? Or to be
|
|
more exact, was that initial guess at the frame's base as returned
|
|
by deprecated_read_fp() wrong? If it was, fix it. This shouldn't
|
|
be necessary since the code should be getting the frame's base
|
|
correct from the outset.
|
|
|
|
This replaced: frame->frame = ....; */
|
|
extern void deprecated_update_frame_base_hack (struct frame_info *frame,
|
|
CORE_ADDR base);
|
|
|
|
/* FIXME: cagney/2003-01-04: Explicitly set the frame's saved_regs
|
|
and/or extra_info. Target code is allocating a fake frame and than
|
|
initializing that to get around the problem of, when creating the
|
|
inner most frame, there is no where to cache information such as
|
|
the prologue analysis. This is fixed by the new unwind mechanism -
|
|
even the inner most frame has somewhere to store things like the
|
|
prolog analysis (or at least will once the frame overhaul is
|
|
finished). */
|
|
extern void deprecated_set_frame_saved_regs_hack (struct frame_info *frame,
|
|
CORE_ADDR *saved_regs);
|
|
extern void deprecated_set_frame_extra_info_hack (struct frame_info *frame,
|
|
struct frame_extra_info *extra_info);
|
|
|
|
/* FIXME: cagney/2003-01-04: Allocate a frame from the heap (rather
|
|
than the frame obstack). Targets do this as a way of saving the
|
|
prologue analysis from the inner most frame before that frame has
|
|
been created. By always creating a frame, this problem goes away. */
|
|
extern struct frame_info *deprecated_frame_xmalloc (void);
|
|
|
|
/* FIXME: cagney/2003-01-05: Allocate a frame, along with the
|
|
saved_regs and extra_info. Set up cleanups for all three. Same as
|
|
for deprecated_frame_xmalloc, targets are calling this when
|
|
creating a scratch `struct frame_info'. The frame overhaul makes
|
|
this unnecessary since all frame queries are parameterized with a
|
|
common cache parameter and a frame. */
|
|
extern struct frame_info *deprecated_frame_xmalloc_with_cleanup (long sizeof_saved_regs,
|
|
long sizeof_extra_info);
|
|
|
|
/* FIXME: cagney/2003-01-07: These are just nasty. Code shouldn't be
|
|
doing this. I suspect it dates back to the days when every field
|
|
of an allocated structure was explicitly initialized. */
|
|
extern void deprecated_set_frame_next_hack (struct frame_info *fi,
|
|
struct frame_info *next);
|
|
extern void deprecated_set_frame_prev_hack (struct frame_info *fi,
|
|
struct frame_info *prev);
|
|
|
|
/* FIXME: cagney/2003-01-07: Instead of the dwarf2cfi having its own
|
|
dedicated `struct frame_info . context' field, the code should use
|
|
the per frame `unwind_cache' that is passed to the
|
|
frame_pc_unwind(), frame_register_unwind() and frame_id_unwind()
|
|
methods.
|
|
|
|
See "dummy-frame.c" for an example of how a cfi-frame object can be
|
|
implemented using this. */
|
|
extern struct context *deprecated_get_frame_context (struct frame_info *fi);
|
|
extern void deprecated_set_frame_context (struct frame_info *fi,
|
|
struct context *context);
|
|
|
|
/* Return non-zero if the architecture is relying on legacy frame
|
|
code. */
|
|
extern int legacy_frame_p (struct gdbarch *gdbarch);
|
|
|
|
#endif /* !defined (FRAME_H) */
|