| /* Code dealing with dummy stack frames, for GDB, the GNU debugger. |
| |
| Copyright 2002 Free Software Foundation, Inc. |
| |
| This file is part of GDB. |
| |
| This program 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 of the License, or |
| (at your option) any later version. |
| |
| This program 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 this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place - Suite 330, |
| Boston, MA 02111-1307, USA. */ |
| |
| #if !defined (DUMMY_FRAME_H) |
| #define DUMMY_FRAME_H 1 |
| |
| struct frame_info; |
| struct regcache; |
| |
| /* GENERIC DUMMY FRAMES |
| |
| The following code serves to maintain the dummy stack frames for |
| inferior function calls (ie. when gdb calls into the inferior via |
| call_function_by_hand). This code saves the machine state before |
| the call in host memory, so we must maintain an independent stack |
| and keep it consistant etc. I am attempting to make this code |
| generic enough to be used by many targets. |
| |
| The cheapest and most generic way to do CALL_DUMMY on a new target |
| is probably to define CALL_DUMMY to be empty, CALL_DUMMY_LENGTH to |
| zero, and CALL_DUMMY_LOCATION to AT_ENTRY. Then you must remember |
| to define PUSH_RETURN_ADDRESS, because no call instruction will be |
| being executed by the target. Also FRAME_CHAIN_VALID as |
| generic_{file,func}_frame_chain_valid and FIX_CALL_DUMMY as |
| generic_fix_call_dummy. */ |
| |
| /* Assuming that FRAME is a dummy, return a register value for the |
| previous frame. */ |
| |
| extern void dummy_frame_register_unwind (struct frame_info *frame, |
| void **unwind_cache, |
| int regnum, |
| int *optimized, |
| enum lval_type *lvalp, |
| CORE_ADDR *addrp, |
| int *realnump, |
| void *valuep); |
| |
| /* Return the regcache that belongs to the dummy-frame identifed by PC |
| and FP, or NULL if no such frame exists. */ |
| /* FIXME: cagney/2002-11-08: The function only exists because of |
| deprecated_generic_get_saved_register. Eliminate that function and |
| this, to, can go. */ |
| |
| extern struct regcache *generic_find_dummy_frame (CORE_ADDR pc, |
| CORE_ADDR fp); |
| #endif /* !defined (DUMMY_FRAME_H) */ |