/* 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; #ifdef FRAME_SECTION_DESCRIPTOR FRAME_SECTION_DESCRIPTOR #endif }; /* 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 *);