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