Phase 1 of the ptid_t changes.

[deliverable/binutils-gdb.git] / gdb / config / i386 / tm-i386v42mp.h

/* Macro definitions for GDB on an Intel i386 running SVR4.2MP
   Copyright 1991, 1994, 1997, 1999, 2000 Free Software Foundation, Inc.
   Written by Fred Fish at Cygnus Support (fnf@cygnus.com)

   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_I386V42MP_H
#define TM_I386V42MP_H 1

/* pick up more generic x86 sysv4 stuff */

#include "i386/tm-i386v4.h"

/* define to select for other sysv4.2mp weirdness (see procfs.c) */

#define UNIXWARE

/* The following macros extract process and lwp/thread ids from a
   composite id.

   For consistency with UnixWare core files, allocate bits 0-15 for
   process ids and bits 16 and up for lwp ids.  Reserve bit 31 for
   negative return values to indicate exceptions, and use bit 30 as a
   flag to indicate a user-mode thread, leaving 14 bits for lwp
   ids. */

/* Number of bits in composite id allocated to process number. */
#define PIDBITS 16

/* Return the process id stored in composite PID. */
#define PIDGET0(PID)            (((PID) & ((1 << PIDBITS) - 1)))
#define PIDGET(PID)             ((PIDGET0 (PID) == ((1 << PIDBITS) -1)) ? -1 : PIDGET0 (PID))

/* Return the thread or lwp id stored in composite PID. */
#define TIDGET(PID)             (((PID) & 0x3fffffff) >> PIDBITS)
#define LIDGET(PID)             TIDGET(PID)

/* Construct a composite id from lwp LID and the process portion of
   composite PID. */
#define MERGEPID(PID, LID)      (PIDGET(PID) | ((LID) << PIDBITS))
#define MKLID(PID, LID)         MERGEPID(PID, LID)

/* Construct a composite id from thread TID and the process portion of
   composite PID. */
#define MKTID(PID, TID)         (MERGEPID(PID, TID) | 0x40000000)

/* Return whether PID contains a user-space thread id. */
#define ISTID(PID)              ((PID) & 0x40000000)

#endif /* ifndef TM_I386V42MP_H */