+/* Functions specific to running gdb native on a Motorola Delta Series sysV68.
+ Copyright (C) 1993, 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+#include "defs.h"
+#include <sys/signal.h> /* for MAXSIG in sys/user.h */
+#include <sys/types.h> /* for ushort in sys/dir.h */
+#include <sys/dir.h> /* for struct direct in sys/user.h */
+#include <sys/user.h>
+
+#include <nlist.h>
+
+#if !defined (offsetof)
+#define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
+#endif
+
+/* Return the address in the core dump or inferior of register REGNO.
+ BLOCKEND is the address of the end of the user structure. */
+
+unsigned int
+register_addr (regno, blockend)
+ int regno;
+ int blockend;
+{
+ static int sysv68reg[] =
+ { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, -1, 15, 16 };
+
+ if (regno >= 0 && regno < sizeof(sysv68reg) / sizeof(sysv68reg[0]))
+ return blockend + sysv68reg[regno] * 4;
+ else if (regno < FPC_REGNUM)
+ return offsetof (struct user, u_fpu.regs.reg[regno - FP0_REGNUM][0]);
+ else if (regno == FPC_REGNUM)
+ return offsetof (struct user, u_fpu.regs.control);
+ else if (regno == FPS_REGNUM)
+ return offsetof (struct user, u_fpu.regs.status);
+ else if (regno == FPI_REGNUM)
+ return offsetof (struct user, u_fpu.regs.iaddr);
+ else
+ {
+ fprintf_unfiltered (gdb_stderr, "\
+Internal error: invalid register number %d in REGISTER_U_ADDR\n",
+ regno);
+ return blockend;
+ }
+}
+
+CORE_ADDR kernel_u_addr;
+
+/* Read the value of the u area from the kernel. */
+void
+_initialize_delta68_nat ()
+{
+ struct nlist nl[2];
+
+ nl[0].n_name = "u";
+ nl[1].n_name = NULL;
+ if (nlist ("/sysV68", nl) == 0 && nl[0].n_scnum != 0)
+ kernel_u_addr = nl[0].n_value;
+ else
+ {
+ perror ("Cannot get kernel u area address");
+ exit (1);
+ }
+}