1 files changed, 146 insertions, 0 deletions
diff --git a/gdb/vax-bsd-nat.c b/gdb/vax-bsd-nat.c
new file mode 100644
index 00000000000..60069b21fb7
--- /dev/null
+++ b/gdb/vax-bsd-nat.c
@@ -0,0 +1,146 @@
+/* Native-dependent code for modern VAX BSD's.
+
+   Copyright (C) 2004-2016 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 "regcache.h"
+#include "target.h"
+
+#include <sys/types.h>
+#include <sys/ptrace.h>
+#include <machine/reg.h>
+
+#include "vax-tdep.h"
+#include "inf-ptrace.h"
+
+/* Supply the general-purpose registers stored in GREGS to REGCACHE.  */
+
+static void
+vaxbsd_supply_gregset (struct regcache *regcache, const void *gregs)
+{
+  const gdb_byte *regs = gregs;
+  int regnum;
+
+  for (regnum = 0; regnum < VAX_NUM_REGS; regnum++)
+    regcache_raw_supply (regcache, regnum, regs + regnum * 4);
+}
+
+/* Collect the general-purpose registers from REGCACHE and store them
+   in GREGS.  */
+
+static void
+vaxbsd_collect_gregset (const struct regcache *regcache,
+			void *gregs, int regnum)
+{
+  gdb_byte *regs = gregs;
+  int i;
+
+  for (i = 0; i <= VAX_NUM_REGS; i++)
+    {
+      if (regnum == -1 || regnum == i)
+	regcache_raw_collect (regcache, i, regs + i * 4);
+    }
+}
+
+
+/* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
+   for all registers.  */
+
+static void
+vaxbsd_fetch_inferior_registers (struct target_ops *ops,
+				 struct regcache *regcache, int regnum)
+{
+  struct reg regs;
+
+  if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
+	      (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+    perror_with_name (_("Couldn't get registers"));
+
+  vaxbsd_supply_gregset (regcache, &regs);
+}
+
+/* Store register REGNUM back into the inferior.  If REGNUM is -1, do
+   this for all registers.  */
+
+static void
+vaxbsd_store_inferior_registers (struct target_ops *ops,
+				 struct regcache *regcache, int regnum)
+{
+  struct reg regs;
+
+  if (ptrace (PT_GETREGS, ptid_get_pid (inferior_ptid),
+	      (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+    perror_with_name (_("Couldn't get registers"));
+
+  vaxbsd_collect_gregset (regcache, &regs, regnum);
+
+  if (ptrace (PT_SETREGS, ptid_get_pid (inferior_ptid),
+	      (PTRACE_TYPE_ARG3) &regs, 0) == -1)
+    perror_with_name (_("Couldn't write registers"));
+}
+
+
+/* Support for debugging kernel virtual memory images.  */
+
+#include <machine/pcb.h>
+
+#include "bsd-kvm.h"
+
+static int
+vaxbsd_supply_pcb (struct regcache *regcache, struct pcb *pcb)
+{
+  int regnum;
+
+  /* The following is true for OpenBSD 3.5:
+
+     The pcb contains the register state at the context switch inside
+     cpu_switch().  */
+
+  /* The stack pointer shouldn't be zero.  */
+  if (pcb->KSP == 0)
+    return 0;
+
+  for (regnum = VAX_R0_REGNUM; regnum < VAX_AP_REGNUM; regnum++)
+    regcache_raw_supply (regcache, regnum, &pcb->R[regnum - VAX_R0_REGNUM]);
+  regcache_raw_supply (regcache, VAX_AP_REGNUM, &pcb->AP);
+  regcache_raw_supply (regcache, VAX_FP_REGNUM, &pcb->FP);
+  regcache_raw_supply (regcache, VAX_SP_REGNUM, &pcb->KSP);
+  regcache_raw_supply (regcache, VAX_PC_REGNUM, &pcb->PC);
+  regcache_raw_supply (regcache, VAX_PS_REGNUM, &pcb->PSL);
+
+  return 1;
+}
+
+
+/* Provide a prototype to silence -Wmissing-prototypes.  */
+void _initialize_vaxbsd_nat (void);
+
+void
+_initialize_vaxbsd_nat (void)
+{
+  struct target_ops *t;
+
+  t = inf_ptrace_target ();
+  t->to_fetch_registers = vaxbsd_fetch_inferior_registers;
+  t->to_store_registers = vaxbsd_store_inferior_registers;
+  add_target (t);
+
+  /* Support debugging kernel virtual memory images.  */
+  bsd_kvm_add_target (vaxbsd_supply_pcb);
+}