gdb/config/i386/tm-i386v42mp.h

   1 /* Macro definitions for GDB on an Intel i386 running SVR4.2MP
   2    Copyright 1991, 1994, 1997, 1999, 2000 Free Software Foundation, Inc.
   3    Written by Fred Fish at Cygnus Support (fnf@cygnus.com)
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #ifndef TM_I386V42MP_H
  23 #define TM_I386V42MP_H 1
  24
  25 /* pick up more generic x86 sysv4 stuff */
  26
  27 #include "i386/tm-i386v4.h"
  28
  29 /* define to select for other sysv4.2mp weirdness (see procfs.c) */
  30
  31 #define UNIXWARE
  32
  33 /* The following macros extract process and lwp/thread ids from a
  34    composite id.
  35
  36    For consistency with UnixWare core files, allocate bits 0-15 for
  37    process ids and bits 16 and up for lwp ids.  Reserve bit 31 for
  38    negative return values to indicate exceptions, and use bit 30 as a
  39    flag to indicate a user-mode thread, leaving 14 bits for lwp
  40    ids. */
  41
  42 /* Number of bits in composite id allocated to process number. */
  43 #define PIDBITS 16
  44
  45 /* Return the process id stored in composite PID. */
  46 #define PIDGET0(PID)            (((PID) & ((1 << PIDBITS) - 1)))
  47 #define PIDGET(PID)             ((PIDGET0 (PID) == ((1 << PIDBITS) -1)) ? -1 : PIDGET0 (PID))
  48
  49 /* Return the thread or lwp id stored in composite PID. */
  50 #define TIDGET(PID)             (((PID) & 0x3fffffff) >> PIDBITS)
  51 #define LIDGET(PID)             TIDGET(PID)
  52
  53 /* Construct a composite id from lwp LID and the process portion of
  54    composite PID. */
  55 #define MERGEPID(PID, LID)      (PIDGET(PID) | ((LID) << PIDBITS))
  56 #define MKLID(PID, LID)         MERGEPID(PID, LID)
  57
  58 /* Construct a composite id from thread TID and the process portion of
  59    composite PID. */
  60 #define MKTID(PID, TID)         (MERGEPID(PID, TID) | 0x40000000)
  61
  62 /* Return whether PID contains a user-space thread id. */
  63 #define ISTID(PID)              ((PID) & 0x40000000)
  64
  65 #endif /* ifndef TM_I386V42MP_H */