Add OpenBSD/m68k support.

* NEWS (New native configurations): Mention OpenBSD/m68k.
* m68kbsd-tdep.c: New file.
* m68kbsd-nat.c: New file.
* Makefile.in (ALLDEPFILES): Add m68kbsd-nat.c and m68kbsd-tdep.c.
(m68kbsd-nat.o, m68kbsd-tdep.o): New dependencies.
* configure.host: Add m68k-*-openbsd.
* configure.tgt: Add m68k-*-openbsd.
* config/m68k/tm-obsd.h: New file.
* config/m68k/obsd.mt: New file.
* config/m68k/obsd.mh: New file.
* config/djgpp/fnchange.lst: Add entries for m68kbsd-nat.c and
m68kbsd-tdep.c.

1 files changed, 170 insertions, 0 deletions

diff --git a/gdb/m68kbsd-nat.c b/gdb/m68kbsd-nat.c
new file mode 100644
index 00000000000..a53707cf0ef
--- /dev/null
+++ b/gdb/m68kbsd-nat.c
@@ -0,0 +1,170 @@
+/* Native-dependent code for Motorola 68000 BSD's.
+
+   Copyright 2004 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"
+#include "inferior.h"
+#include "regcache.h"
+
+#include "gdb_assert.h"
+#include <sys/types.h>
+#include <sys/ptrace.h>
+#include <machine/reg.h>
+
+#include "m68k-tdep.h"
+
+static int
+m68kbsd_gregset_supplies_p (int regnum)
+{
+  return (regnum >= M68K_D0_REGNUM && regnum <= M68K_PC_REGNUM);
+}
+
+static int
+m68kbsd_fpregset_supplies_p (int regnum)
+{
+  return (regnum >= M68K_FP0_REGNUM && regnum <= M68K_FPI_REGNUM);
+}
+
+/* Supply the general-purpose registers stored in GREGS to REGCACHE.  */
+
+static void
+m68kbsd_supply_gregset (struct regcache *regcache, const void *gregs)
+{
+  const char *regs = gregs;
+  int regnum;
+
+  for (regnum = M68K_D0_REGNUM; regnum <= M68K_PC_REGNUM; regnum++)
+    regcache_raw_supply (regcache, regnum, regs + regnum * 4);
+}
+
+/* Supply the floating-point registers stored in FPREGS to REGCACHE.  */
+
+static void
+m68kbsd_supply_fpregset (struct regcache *regcache, const void *fpregs)
+{
+  const char *regs = fpregs;
+  int regnum;
+
+  for (regnum = M68K_FP0_REGNUM; regnum <= M68K_FPI_REGNUM; regnum++)
+    regcache_raw_supply (regcache, regnum,
+			 regs + m68kbsd_fpreg_offset (regnum));
+}
+
+/* Collect the general-purpose registers from REGCACHE and store them
+   in GREGS.  */
+
+static void
+m68kbsd_collect_gregset (const struct regcache *regcache,
+			 void *gregs, int regnum)
+{
+  char *regs = gregs;
+  int i;
+
+  for (i = M68K_D0_REGNUM; i <= M68K_PC_REGNUM; i++)
+    {
+      if (regnum == -1 || regnum == i)
+	regcache_raw_collect (regcache, regnum, regs + i * 4);
+    }
+}
+
+/* Collect the floating-point registers from REGCACHE and store them
+   in FPREGS.  */
+
+static void
+m68kbsd_collect_fpregset (struct regcache *regcache,
+			  void *fpregs, int regnum)
+{
+  char *regs = fpregs;
+  int i;
+
+  for (i = M68K_FP0_REGNUM; i <= M68K_FPI_REGNUM; i++)
+    {
+      if (regnum == -1 || regnum == i)
+	regcache_raw_collect (regcache, regnum,
+			      regs + m68kbsd_fpreg_offset (i));
+    }
+}
+
+
+/* Fetch register REGNUM from the inferior.  If REGNUM is -1, do this
+   for all registers (including the floating-point registers).  */
+
+void
+fetch_inferior_registers (int regnum)
+{
+  if (regnum == -1 || m68kbsd_gregset_supplies_p (regnum))
+    {
+      struct reg regs;
+
+      if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
+		  (PTRACE_ARG3_TYPE) &regs, 0) == -1)
+	perror_with_name ("Couldn't get registers");
+
+      m68kbsd_supply_gregset (current_regcache, &regs);
+    }
+
+  if (regnum == -1 || m68kbsd_fpregset_supplies_p (regnum))
+    {
+      struct fpreg fpregs;
+
+      if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
+		  (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
+	perror_with_name ("Couldn't get floating point status");
+
+      m68kbsd_supply_fpregset (current_regcache, &fpregs);
+    }
+}
+
+/* Store register REGNUM back into the inferior.  If REGNUM is -1, do
+   this for all registers (including the floating-point registers).  */
+
+void
+store_inferior_registers (int regnum)
+{
+  if (regnum == -1 || m68kbsd_gregset_supplies_p (regnum))
+    {
+      struct reg regs;
+
+      if (ptrace (PT_GETREGS, PIDGET (inferior_ptid),
+                  (PTRACE_ARG3_TYPE) &regs, 0) == -1)
+        perror_with_name ("Couldn't get registers");
+
+      m68kbsd_collect_gregset (current_regcache, &regs, regnum);
+
+      if (ptrace (PT_SETREGS, PIDGET (inferior_ptid),
+	          (PTRACE_ARG3_TYPE) &regs, 0) == -1)
+        perror_with_name ("Couldn't write registers");
+    }
+
+  if (regnum == -1 || m68kbsd_fpregset_supplies_p (regnum))
+    {
+      struct fpreg fpregs;
+
+      if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
+		  (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
+	perror_with_name ("Couldn't get floating point status");
+
+      m68kbsd_collect_fpregset (current_regcache, &fpregs, regnum);
+
+      if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
+		  (PTRACE_ARG3_TYPE) &fpregs, 0) == -1)
+	perror_with_name ("Couldn't write floating point status");
+    }
+}