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da62e63311
Add frame debug info addresses: * frame-base.c: New file. * frame-base.h: New file. * frame.h (struct frame_base): Add opaque declaration. (get_frame_base): Update comment. (get_frame_base_address): Declare. (get_frame_locals_address): Declare. (get_frame_args_address): Declare. (struct frame_info): Add "base" and "base_cache". Update comments on the unwinder. * frame.c: Include "frame-base.h". (get_frame_locals_address): New function. (get_frame_base_address): New function. (get_frame_args_address): New function. * findvar.c (read_var_value): Use get_frame_locals_address and get_frame_args_address. * stack.c (frame_info): Use get_frame_locals_address and get_frame_args_address. (FRAME_ARGS_ADDRESS_CORRECT): Delete conditionally defined macro, moved to "frame-base.c". * printcmd.c (print_frame_nameless_args): Ditto. * symtab.h (address_class): Update comments. * dwarf2loc.c (dwarf_expr_frame_base): Add note about get_frame_base_address. * dwarf2expr.c (execute_stack_op): Ditto. * Makefile.in (frame_base_h): Define. (frame.o): Update dependencies. (frame-base.o): Add dependencies. (SFILES): Add frame-base.c. (COMMON_OBS): Add frame-base.o.
95 lines
3.2 KiB
C
95 lines
3.2 KiB
C
/* Definitions for a frame base, for GDB, the GNU debugger.
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Copyright 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_BASE_H)
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#define FRAME_BASE_H 1
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struct frame_info;
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struct frame_id;
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struct frame_unwind;
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struct frame_base;
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struct gdbarch;
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struct regcache;
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/* Return the frame base methods for the function that contains PC, or
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NULL if it can't handle this frame. */
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typedef const struct frame_base *(frame_base_p_ftype) (CORE_ADDR pc);
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/* Add a frame base handler to the list. The predicates are polled in
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the order that they are appended. */
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extern void frame_base_append_predicate (struct gdbarch *gdbarch,
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frame_base_p_ftype *p);
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/* Set the default frame base. If all else fails, this one is
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returned. If this isn't set, the default is to use legacy code
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that uses things like the frame ID's base (ulgh!). */
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extern void frame_base_set_default (struct gdbarch *gdbarch,
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const struct frame_base *def);
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/* Iterate through the list of frame base handlers until one returns
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an implementation. */
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extern const struct frame_base *frame_base_find_by_pc (struct gdbarch *gdbarch,
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CORE_ADDR pc);
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/* Assuming the frame chain: (outer) prev <-> this <-> next (inner);
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and that this is a `normal frame'; use the NEXT frame, and its
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register unwind method, to determine the address of THIS frame's
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`base'.
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The exact meaning of `base' is highly dependant on the type of the
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debug info. It is assumed that dwarf2, stabs, ... will each
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provide their own methods.
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A typical implmentation will return the same value for base,
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locals-base and args-base. That value, however, will likely be
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different to the frame ID's stack address. */
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/* A generic base address. */
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typedef CORE_ADDR (frame_this_base_ftype) (struct frame_info *next_frame,
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void **this_base_cache);
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/* The base address of the frame's local variables. */
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typedef CORE_ADDR (frame_this_locals_ftype) (struct frame_info *next_frame,
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void **this_base_cache);
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/* The base address of the frame's arguments / parameters. */
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typedef CORE_ADDR (frame_this_args_ftype) (struct frame_info *next_frame,
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void **this_base_cache);
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struct frame_base
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{
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/* If non-NULL, a low-level unwinder that shares its implementation
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with this high-level frame-base method. */
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const struct frame_unwind *unwind;
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frame_this_base_ftype *this_base;
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frame_this_locals_ftype *this_locals;
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frame_this_args_ftype *this_args;
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};
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#endif
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