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-/* Signal trampoline unwinder.
-
- Copyright (C) 2004, 2005, 2007, 2008, 2009 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 3 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, see <http://www.gnu.org/licenses/>. */
-
-#ifndef TRAMP_FRAME_H
-#define TRAMP_FRAME_H
-
-#include "frame.h" /* For "enum frame_type". */
-
-struct trad_frame;
-struct frame_info;
-struct trad_frame_cache;
-
-/* A trampoline consists of a small sequence of instructions placed at
- an unspecified location in the inferior's address space. The only
- identifying attribute of the trampoline's address is that it does
- not fall inside an object file's section.
-
- The only way to identify a trampoline is to perform a brute force
- examination of the instructions at and around the PC.
-
- This module provides a convenient interface for performing that
- operation. */
-
-/* A trampoline descriptor. */
-
-/* Magic instruction that to mark the end of the signal trampoline
- instruction sequence. */
-#define TRAMP_SENTINEL_INSN ((LONGEST) -1)
-
-struct tramp_frame
-{
- /* The trampoline's type, some a signal trampolines, some are normal
- call-frame trampolines (aka thunks). */
- enum frame_type frame_type;
- /* The trampoline's entire instruction sequence. It consists of a
- bytes/mask pair. Search for this in the inferior at or around
- the frame's PC. It is assumed that the PC is INSN_SIZE aligned,
- and that each element of TRAMP contains one INSN_SIZE
- instruction. It is also assumed that INSN[0] contains the first
- instruction of the trampoline and hence the address of the
- instruction matching INSN[0] is the trampoline's "func" address.
- The instruction sequence is terminated by
- TRAMP_SENTINEL_INSN. */
- int insn_size;
- struct
- {
- ULONGEST bytes;
- ULONGEST mask;
- } insn[48];
- /* Initialize a trad-frame cache corresponding to the tramp-frame.
- FUNC is the address of the instruction TRAMP[0] in memory. */
- void (*init) (const struct tramp_frame *self,
- struct frame_info *this_frame,
- struct trad_frame_cache *this_cache,
- CORE_ADDR func);
-};
-
-void tramp_frame_prepend_unwinder (struct gdbarch *gdbarch,
- const struct tramp_frame *tramp);
-
-#endif