1 files changed, 156 insertions, 0 deletions
diff --git a/gdb/x86-bsd-nat.c b/gdb/x86-bsd-nat.c
new file mode 100644
index 0000000..1998476
--- /dev/null
+++ b/gdb/x86-bsd-nat.c
@@ -0,0 +1,156 @@
+/* Native-dependent code for X86 BSD's.
+
+   Copyright (C) 2003-2016 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 3 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, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+#include "inferior.h"
+#include "gdbthread.h"
+
+/* We include <signal.h> to make sure `struct fxsave64' is defined on
+   NetBSD, since NetBSD's <machine/reg.h> needs it.  */
+#include <signal.h>
+#include <sys/types.h>
+#include <sys/ptrace.h>
+#include <machine/reg.h>
+
+#include "x86-nat.h"
+#include "x86-bsd-nat.h"
+#include "inf-ptrace.h"
+
+
+#ifdef PT_GETXSTATE_INFO
+size_t x86bsd_xsave_len;
+#endif
+
+/* Support for debug registers.  */
+
+#ifdef HAVE_PT_GETDBREGS
+static void (*super_mourn_inferior) (struct target_ops *ops);
+
+/* Implement the "to_mourn_inferior" target_ops method.  */
+
+static void
+x86bsd_mourn_inferior (struct target_ops *ops)
+{
+  x86_cleanup_dregs ();
+  super_mourn_inferior (ops);
+}
+
+/* Not all versions of FreeBSD/i386 that support the debug registers
+   have this macro.  */
+#ifndef DBREG_DRX
+#define DBREG_DRX(d, x) ((&d->dr0)[x])
+#endif
+
+static unsigned long
+x86bsd_dr_get (ptid_t ptid, int regnum)
+{
+  struct dbreg dbregs;
+
+  if (ptrace (PT_GETDBREGS, get_ptrace_pid (inferior_ptid),
+	      (PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
+    perror_with_name (_("Couldn't read debug registers"));
+
+  return DBREG_DRX ((&dbregs), regnum);
+}
+
+static void
+x86bsd_dr_set (int regnum, unsigned long value)
+{
+  struct thread_info *thread;
+  struct dbreg dbregs;
+
+  if (ptrace (PT_GETDBREGS, get_ptrace_pid (inferior_ptid),
+              (PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
+    perror_with_name (_("Couldn't get debug registers"));
+
+  /* For some mysterious reason, some of the reserved bits in the
+     debug control register get set.  Mask these off, otherwise the
+     ptrace call below will fail.  */
+  DBREG_DRX ((&dbregs), 7) &= ~(0xffffffff0000fc00);
+
+  DBREG_DRX ((&dbregs), regnum) = value;
+
+  ALL_NON_EXITED_THREADS (thread)
+    if (thread->inf == current_inferior ())
+      {
+	if (ptrace (PT_SETDBREGS, get_ptrace_pid (thread->ptid),
+		    (PTRACE_TYPE_ARG3) &dbregs, 0) == -1)
+	  perror_with_name (_("Couldn't write debug registers"));
+      }
+}
+
+static void
+x86bsd_dr_set_control (unsigned long control)
+{
+  x86bsd_dr_set (7, control);
+}
+
+static void
+x86bsd_dr_set_addr (int regnum, CORE_ADDR addr)
+{
+  gdb_assert (regnum >= 0 && regnum <= 4);
+
+  x86bsd_dr_set (regnum, addr);
+}
+
+static CORE_ADDR
+x86bsd_dr_get_addr (int regnum)
+{
+  return x86bsd_dr_get (inferior_ptid, regnum);
+}
+
+static unsigned long
+x86bsd_dr_get_status (void)
+{
+  return x86bsd_dr_get (inferior_ptid, 6);
+}
+
+static unsigned long
+x86bsd_dr_get_control (void)
+{
+  return x86bsd_dr_get (inferior_ptid, 7);
+}
+
+#endif /* PT_GETDBREGS */
+
+/* Create a prototype *BSD/x86 target.  The client can override it
+   with local methods.  */
+
+struct target_ops *
+x86bsd_target (void)
+{
+  struct target_ops *t;
+
+  t = inf_ptrace_target ();
+
+#ifdef HAVE_PT_GETDBREGS
+  x86_use_watchpoints (t);
+
+  x86_dr_low.set_control = x86bsd_dr_set_control;
+  x86_dr_low.set_addr = x86bsd_dr_set_addr;
+  x86_dr_low.get_addr = x86bsd_dr_get_addr;
+  x86_dr_low.get_status = x86bsd_dr_get_status;
+  x86_dr_low.get_control = x86bsd_dr_get_control;
+  x86_set_debug_register_length (sizeof (void *));
+  super_mourn_inferior = t->to_mourn_inferior;
+  t->to_mourn_inferior = x86bsd_mourn_inferior;
+#endif /* HAVE_PT_GETDBREGS */
+
+  return t;
+}