gdb/config/i386/nm-i386v42mp.h

   1 /* Native support for i386 running SVR4.
   2    Copyright 1986, 1987, 1989, 1992, 1996, 1997, 1998, 2007
   3    Free Software Foundation, Inc.
   4    Changes for 80386 by Pace Willisson (pace@prep.ai.mit.edu), July 1988.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 2 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program; if not, write to the Free Software
  20    Foundation, Inc., 59 Temple Place - Suite 330,
  21    Boston, MA 02111-1307, USA.  */
  22
  23 #ifndef NM_I386V42MP_H
  24 #define NM_I386V42MP_H
  25
  26 /* SVR4 has /proc support, so use it instead of ptrace. */
  27
  28 #define USE_PROC_FS
  29
  30 /* define to select for other sysv4.2mp weirdness (see procfs.c) */
  31
  32 #define UNIXWARE
  33
  34 #if 0
  35 /* The following macros extract process and lwp/thread ids from a
  36    composite id.
  37
  38    For consistency with UnixWare core files, allocate bits 0-15 for
  39    process ids and bits 16 and up for lwp ids.  Reserve bit 31 for
  40    negative return values to indicate exceptions, and use bit 30 as a
  41    flag to indicate a user-mode thread, leaving 14 bits for lwp
  42    ids. */
  43
  44 /* Number of bits in composite id allocated to process number. */
  45 #define PIDBITS 16
  46
  47 /* Return the process id stored in composite PID. */
  48 #define PIDGET(PID)             (((PID) & ((1 << PIDBITS) - 1)))
  49
  50 /* Return the thread or lwp id stored in composite PID. */
  51 #define TIDGET(PID)             (((PID) & 0x3fffffff) >> PIDBITS)
  52 #define LIDGET(PID)             TIDGET(PID)
  53
  54 /* Construct a composite id from lwp LID and the process portion of
  55    composite PID. */
  56 #define MERGEPID(PID, LID)      (PIDGET(PID) | ((LID) << PIDBITS))
  57 #define MKLID(PID, LID)         MERGEPID(PID, LID)
  58
  59 /* Construct a composite id from thread TID and the process portion of
  60    composite PID. */
  61 #define MKTID(PID, TID)         (MERGEPID(PID, TID) | 0x40000000)
  62
  63 /* Return whether PID contains a user-space thread id. */
  64 #define ISTID(PID)              ((PID) & 0x40000000)
  65 #endif
  66
  67 /* New definitions of the ptid stuff.  Due to the way the
  68    code is structured in uw-thread.c, I'm overloading the thread id
  69    and lwp id onto the lwp field.  The tid field is used to indicate
  70    whether the lwp is a tid or not.
  71
  72    FIXME: Check that core file support is not broken.  (See original
  73    #if 0'd comments above.)
  74    FIXME: Restructure uw-thread.c so that the struct ptid fields
  75    can be used as intended. */
  76
  77 /* Return the process id stored in composite PID. */
  78 #define PIDGET(PID) (ptid_get_pid (PID))
  79
  80 /* Return the thread or lwp id stored in composite PID. */
  81 #define TIDGET(PID) (ptid_get_lwp (PID))
  82 #define LIDGET(PID) TIDGET(PID)
  83
  84 #define MERGEPID(PID, LID) (ptid_build ((PID), (LID), 0))
  85 #define MKLID(PID, LID) (ptid_build ((PID), (LID), 0))
  86
  87 /* Construct a composite id from thread TID and the process portion of
  88    composite PID. */
  89 #define MKTID(PID, TID) (ptid_build ((PID), (TID), 1))
  90
  91 /* Return whether PID contains a user-space thread id. */
  92 #define ISTID(PID) (ptid_get_tid (PID))
  93
  94 /* This is the amount to subtract from u.u_ar0
  95    to get the offset in the core file of the register values.  */
  96 #define KERNEL_U_ADDR 0xe0000000
  97
  98 #endif /* NM_I386V42MP_H */