| /* 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 *); |