1999-10-16 06:09:09 +00:00
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/* Header file for unwinding stack frames for exception handling. */
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/* Compile this one with gcc. */
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/* Copyright (C) 1997, 1998 Free Software Foundation, Inc.
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Contributed by Jason Merrill <jason@cygnus.com>.
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This file is part of GNU CC.
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GNU CC 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, or (at your option)
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any later version.
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GNU CC 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 GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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1999-08-26 09:30:50 +00:00
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typedef struct frame_state
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{
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void *cfa;
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void *eh_ptr;
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long cfa_offset;
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long args_size;
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long reg_or_offset[FIRST_PSEUDO_REGISTER+1];
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unsigned short cfa_reg;
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unsigned short retaddr_column;
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char saved[FIRST_PSEUDO_REGISTER+1];
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} frame_state;
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/* Values for 'saved' above. */
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#define REG_UNSAVED 0
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#define REG_SAVED_OFFSET 1
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#define REG_SAVED_REG 2
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/* The representation for an "object" to be searched for frame unwind info.
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For targets with named sections, one object is an executable or shared
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library; for other targets, one object is one translation unit.
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A copy of this structure declaration is printed by collect2.c;
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keep the copies synchronized! */
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struct object {
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void *pc_begin;
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void *pc_end;
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struct dwarf_fde *fde_begin;
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struct dwarf_fde **fde_array;
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size_t count;
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struct object *next;
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};
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/* Note the following routines are exported interfaces from libgcc; do not
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change these interfaces. Instead create new interfaces. Also note
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references to these functions may be made weak in files where they
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are referenced. */
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extern void __register_frame (void * );
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extern void __register_frame_table (void *);
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extern void __deregister_frame (void *);
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/* Called either from crtbegin.o or a static constructor to register the
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unwind info for an object or translation unit, respectively. */
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extern void __register_frame_info (void *, struct object *);
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/* Similar, but BEGIN is actually a pointer to a table of unwind entries
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for different translation units. Called from the file generated by
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collect2. */
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extern void __register_frame_info_table (void *, struct object *);
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/* Called from crtend.o to deregister the unwind info for an object. */
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extern void *__deregister_frame_info (void *);
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/* Called from __throw to find the registers to restore for a given
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PC_TARGET. The caller should allocate a local variable of `struct
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frame_state' (declared in frame.h) and pass its address to STATE_IN.
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Returns NULL on failure, otherwise returns STATE_IN. */
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extern struct frame_state *__frame_state_for (void *, struct frame_state *);
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