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/* Definitions to make GDB run on an Alpha box under Linux. The
definitions here are used when the _target_ system is running Linux.
Copyright 1996 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. */
#ifndef TM_LINUXALPHA_H
#define TM_LINUXALPHA_H
#include "alpha/tm-alpha.h"
/* Are we currently handling a signal ? */
extern long alpha_linux_sigtramp_offset ();
#undef IN_SIGTRAMP
#define IN_SIGTRAMP(pc, name) (alpha_linux_sigtramp_offset (pc) >= 0)
/* Get start and end address of sigtramp handler. */
#define SIGTRAMP_START(pc) (pc - alpha_linux_sigtramp_offset (pc))
#define SIGTRAMP_END(pc) (SIGTRAMP_START(pc) + 3*4)
/* Number of traps that happen between exec'ing the shell to run an
inferior, and when we finally get to the inferior code. This is 2
on Linux and most implementations. */
#undef START_INFERIOR_TRAPS_EXPECTED
#define START_INFERIOR_TRAPS_EXPECTED 2
/* Return TRUE if procedure descriptor PROC is a procedure descriptor
that refers to a dynamically generated sigtramp function. */
#undef PROC_DESC_IS_DYN_SIGTRAMP
#define PROC_SIGTRAMP_MAGIC 0x0e0f0f0f
#define PROC_DESC_IS_DYN_SIGTRAMP(proc) ((proc)->pdr.isym \
== PROC_SIGTRAMP_MAGIC)
#undef SET_PROC_DESC_IS_DYN_SIGTRAMP
#define SET_PROC_DESC_IS_DYN_SIGTRAMP(proc) ((proc)->pdr.isym \
= PROC_SIGTRAMP_MAGIC)
/* If PC is inside a dynamically generated sigtramp function, return
how many bytes the program counter is beyond the start of that
function. Otherwise, return a negative value. */
#undef DYNAMIC_SIGTRAMP_OFFSET
#define DYNAMIC_SIGTRAMP_OFFSET(pc) (alpha_linux_sigtramp_offset (pc))
/* Translate a signal handler frame into the address of the sigcontext
structure. */
#undef SIGCONTEXT_ADDR
#define SIGCONTEXT_ADDR(frame) ((frame)->frame - 0x298)
/* If FRAME refers to a sigtramp frame, return the address of the next frame.
Under Linux, sigtramp handlers have dynamically generated procedure
descriptors that make this hack unnecessary. */
#undef FRAME_PAST_SIGTRAMP_FRAME
#define FRAME_PAST_SIGTRAMP_FRAME(frame, pc) (0)
#endif /* TM_LINUXALPHA_H */
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