Redefine ptid_t to be a struct rather than an int.

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

diff --git a/gdb/config/i386/tm-i386v42mp.h b/gdb/config/i386/tm-i386v42mp.h
index 29c4ba0495ede2f712ecae6b70841c520a4cc782..5671e42944c06aeb93b0f106b1229701fa78f6a7 100644 (file)
--- a/gdb/config/i386/tm-i386v42mp.h
+++ b/gdb/config/i386/tm-i386v42mp.h
@@ -1,5 +1,5 @@
 /* Macro definitions for GDB on an Intel i386 running SVR4.2MP
-   Copyright (C) 1991, 1994 Free Software Foundation, Inc.
+   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.
@@ -26,20 +26,68 @@
 
 #include "i386/tm-i386v4.h"
 
-/* procfs on this architecture has multiple fds (ctl, as, map, status)
-   including a control fd */
+/* define to select for other sysv4.2mp weirdness (see procfs.c) */
 
-#ifndef HAVE_MULTIPLE_PROC_FDS
-#define HAVE_MULTIPLE_PROC_FDS
+#define UNIXWARE
+
+#if 0
+/* 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 PIDGET(PID)             (((PID) & ((1 << PIDBITS) - 1)))
+
+/* 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
 
-/* procfs on this architecture communicates with read/write instead
-   of ioctl */
+/* New definitions of the ptid stuff.  Due to the way the
+   code is structured in uw-thread.c, I'm overloading the thread id
+   and lwp id onto the lwp field.  The tid field is used to indicate
+   whether the lwp is a tid or not.  
+   
+   FIXME: Check that core file support is not broken.  (See original
+   #if 0'd comments above.)
+   FIXME: Restructure uw-thread.c so that the struct ptid fields
+   can be used as intended. */
 
-#define PROCFS_USE_READ_WRITE
+/* Return the process id stored in composite PID. */
+#define PIDGET(PID) (ptid_get_pid (PID))
 
-/* define to select for other sysv4.2mp weirdness */
+/* Return the thread or lwp id stored in composite PID. */
+#define TIDGET(PID) (ptid_get_lwp (PID))
+#define LIDGET(PID) TIDGET(PID)
 
-#define UNIXWARE
+#define MERGEPID(PID, LID) (ptid_build ((PID), (LID), 0))
+#define MKLID(PID, LID) (ptid_build ((PID), (LID), 0))
+
+/* Construct a composite id from thread TID and the process portion of
+   composite PID. */
+#define MKTID(PID, TID) (ptid_build ((PID), (TID), 1))
+
+/* Return whether PID contains a user-space thread id. */
+#define ISTID(PID) (ptid_get_tid (PID))
 
 #endif /* ifndef TM_I386V42MP_H */