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diff --git a/contrib/gdb/gdb/i386v-nat.c b/contrib/gdb/gdb/i386v-nat.c
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+/* Intel 386 native support for System V systems (pre-SVR4).
+
+ Copyright 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1998,
+ 1999, 2000, 2002 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. */
+
+#include "defs.h"
+
+#ifdef HAVE_PTRACE_H
+#include <ptrace.h>
+#else
+#ifdef HAVE_SYS_PTRACE_H
+#include <sys/ptrace.h>
+#endif
+#endif
+
+#include "frame.h"
+#include "inferior.h"
+#include "language.h"
+#include "gdbcore.h"
+
+#ifdef USG
+#include <sys/types.h>
+#endif
+
+#include <sys/param.h>
+#include <sys/dir.h>
+#include <signal.h>
+#include <sys/user.h>
+#include <sys/ioctl.h>
+#include <fcntl.h>
+
+#ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
+#include <sys/debugreg.h>
+#endif
+
+#include <sys/file.h>
+#include "gdb_stat.h"
+
+#ifdef HAVE_SYS_REG_H
+#include <sys/reg.h>
+#endif
+
+#include "floatformat.h"
+
+#include "target.h"
+
+#include "i386-tdep.h"
+
+
+/* Mapping between the general-purpose registers in `struct user'
+ format and GDB's register array layout. */
+static int regmap[] =
+{
+ EAX, ECX, EDX, EBX,
+ UESP, EBP, ESI, EDI,
+ EIP, EFL, CS, SS,
+ DS, ES, FS, GS,
+};
+
+/* Support for the user struct. */
+
+/* Return the address of register REGNUM. BLOCKEND is the value of
+ u.u_ar0, and points to the place where GS is stored. */
+
+CORE_ADDR
+register_u_addr (CORE_ADDR blockend, int regnum)
+{
+ struct user u;
+ CORE_ADDR fpstate;
+
+ if (i386_fp_regnum_p (regnum))
+ {
+#ifdef KSTKSZ /* SCO, and others? */
+ blockend += 4 * (SS + 1) - KSTKSZ;
+ fpstate = blockend + ((char *) &u.u_fps.u_fpstate - (char *) &u);
+ return (fpstate + 0x1c + 10 * (regnum - FP0_REGNUM));
+#else
+ fpstate = blockend + ((char *) &u.i387.st_space - (char *) &u);
+ return (fpstate + 10 * (regnum - FP0_REGNUM));
+#endif
+ }
+
+ return (blockend + 4 * regmap[regnum]);
+}
+
+/* Return the size of the user struct. */
+
+int
+kernel_u_size (void)
+{
+ return (sizeof (struct user));
+}
+
+#ifdef TARGET_HAS_HARDWARE_WATCHPOINTS
+
+#if !defined (offsetof)
+#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
+#endif
+
+/* Record the value of the debug control register. */
+static int debug_control_mirror;
+
+/* Record which address associates with which register. */
+static CORE_ADDR address_lookup[DR_LASTADDR - DR_FIRSTADDR + 1];
+
+static int i386_insert_aligned_watchpoint (int, CORE_ADDR, CORE_ADDR, int,
+ int);
+
+static int i386_insert_nonaligned_watchpoint (int, CORE_ADDR, CORE_ADDR, int,
+ int);
+
+/* Insert a watchpoint. */
+
+int
+i386_insert_watchpoint (int pid, CORE_ADDR addr, int len, int rw)
+{
+ return i386_insert_aligned_watchpoint (pid, addr, addr, len, rw);
+}
+
+static int
+i386_insert_aligned_watchpoint (int pid, CORE_ADDR waddr, CORE_ADDR addr,
+ int len, int rw)
+{
+ int i;
+ int read_write_bits, len_bits;
+ int free_debug_register;
+ int register_number;
+
+ /* Look for a free debug register. */
+ for (i = DR_FIRSTADDR; i <= DR_LASTADDR; i++)
+ {
+ if (address_lookup[i - DR_FIRSTADDR] == 0)
+ break;
+ }
+
+ /* No more debug registers! */
+ if (i > DR_LASTADDR)
+ return -1;
+
+ read_write_bits = (rw & 1) ? DR_RW_READ : DR_RW_WRITE;
+
+ if (len == 1)
+ len_bits = DR_LEN_1;
+ else if (len == 2)
+ {
+ if (addr % 2)
+ return i386_insert_nonaligned_watchpoint (pid, waddr, addr, len, rw);
+ len_bits = DR_LEN_2;
+ }
+
+ else if (len == 4)
+ {
+ if (addr % 4)
+ return i386_insert_nonaligned_watchpoint (pid, waddr, addr, len, rw);
+ len_bits = DR_LEN_4;
+ }
+ else
+ return i386_insert_nonaligned_watchpoint (pid, waddr, addr, len, rw);
+
+ free_debug_register = i;
+ register_number = free_debug_register - DR_FIRSTADDR;
+ debug_control_mirror |=
+ ((read_write_bits | len_bits)
+ << (DR_CONTROL_SHIFT + DR_CONTROL_SIZE * register_number));
+ debug_control_mirror |=
+ (1 << (DR_LOCAL_ENABLE_SHIFT + DR_ENABLE_SIZE * register_number));
+ debug_control_mirror |= DR_LOCAL_SLOWDOWN;
+ debug_control_mirror &= ~DR_CONTROL_RESERVED;
+
+ ptrace (6, pid, offsetof (struct user, u_debugreg[DR_CONTROL]),
+ debug_control_mirror);
+ ptrace (6, pid, offsetof (struct user, u_debugreg[free_debug_register]),
+ addr);
+
+ /* Record where we came from. */
+ address_lookup[register_number] = addr;
+ return 0;
+}
+
+static int
+i386_insert_nonaligned_watchpoint (int pid, CORE_ADDR waddr, CORE_ADDR addr,
+ int len, int rw)
+{
+ int align;
+ int size;
+ int rv;
+
+ static int size_try_array[4][4] =
+ {
+ { 1, 1, 1, 1 }, /* trying size one */
+ { 2, 1, 2, 1 }, /* trying size two */
+ { 2, 1, 2, 1 }, /* trying size three */
+ { 4, 1, 2, 1 } /* trying size four */
+ };
+
+ rv = 0;
+ while (len > 0)
+ {
+ align = addr % 4;
+ /* Four is the maximum length for 386. */
+ size = size_try_array[len > 4 ? 3 : len - 1][align];
+
+ rv = i386_insert_aligned_watchpoint (pid, waddr, addr, size, rw);
+ if (rv)
+ {
+ i386_remove_watchpoint (pid, waddr, size);
+ return rv;
+ }
+ addr += size;
+ len -= size;
+ }
+ return rv;
+}
+
+/* Remove a watchpoint. */
+
+int
+i386_remove_watchpoint (int pid, CORE_ADDR addr, int len)
+{
+ int i;
+ int register_number;
+
+ for (i = DR_FIRSTADDR; i <= DR_LASTADDR; i++)
+ {
+ register_number = i - DR_FIRSTADDR;
+ if (address_lookup[register_number] == addr)
+ {
+ debug_control_mirror &=
+ ~(1 << (DR_LOCAL_ENABLE_SHIFT + DR_ENABLE_SIZE * register_number));
+ address_lookup[register_number] = 0;
+ }
+ }
+ ptrace (6, pid, offsetof (struct user, u_debugreg[DR_CONTROL]),
+ debug_control_mirror);
+ ptrace (6, pid, offsetof (struct user, u_debugreg[DR_STATUS]), 0);
+
+ return 0;
+}
+
+/* Check if stopped by a watchpoint. */
+
+CORE_ADDR
+i386_stopped_by_watchpoint (int pid)
+{
+ int i;
+ int status;
+
+ status = ptrace (3, pid, offsetof (struct user, u_debugreg[DR_STATUS]), 0);
+ ptrace (6, pid, offsetof (struct user, u_debugreg[DR_STATUS]), 0);
+
+ for (i = DR_FIRSTADDR; i <= DR_LASTADDR; i++)
+ {
+ if (status & (1 << (i - DR_FIRSTADDR)))
+ return address_lookup[i - DR_FIRSTADDR];
+ }
+
+ return 0;
+}
+
+#endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */
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