gdb/delta68-nat.c

   1 #include "defs.h"
   2 #include <sys/signal.h> /* for MAXSIG in sys/user.h */
   3 #include <sys/types.h>  /* for ushort in sys/dir.h */
   4 #include <sys/dir.h>    /* for struct direct in sys/user.h */
   5 #include <sys/user.h>
   6
   7 #include <nlist.h>
   8
   9 #if !defined (offsetof)
  10 #define offsetof(TYPE, MEMBER) ((unsigned long) &((TYPE *)0)->MEMBER)
  11 #endif
  12
  13 /* Return the address in the core dump or inferior of register REGNO.
  14    BLOCKEND is the address of the end of the user structure.  */
  15
  16 unsigned int
  17 register_addr (regno, blockend)
  18      int        regno;
  19      int        blockend;
  20 {
  21   static int    sysv68reg[] =
  22     { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, -1, 15, 16 };
  23
  24   if (regno >= 0 && regno < sizeof(sysv68reg) / sizeof(sysv68reg[0]))
  25     return blockend + sysv68reg[regno] * 4;
  26   else if (regno < FPC_REGNUM)
  27     return offsetof (struct user, u_fpu.regs.reg[regno - FP0_REGNUM]
  28   else if (regno == FPC_REGNUM)
  29     return offsetof (struct user, u_fpu.regs.control);
  30   else if (regno == FPS_REGNUM)
  31     return offsetof (struct user, u_fpu.regs.status);
  32   else if (regno == FPI_REGNUM)
  33     return offsetof (struct user, u_fpu.regs.iaddr);
  34   else
  35     {
  36       fprintf (stderr, "\
  37 Internal error: invalid register number %d in REGISTER_U_ADDR\n",
  38                regno);
  39       return blockend;
  40     }
  41 }
  42
  43 CORE_ADDR kernel_u_addr;
  44 static struct nlist nl[] = {{ "_u", -1, }, { (char *) 0, }};
  45
  46 /* Read the value of the u area from the kernel.  */
  47 void _initialize_kernel_u_addr ()
  48 {
  49   if (nlist ("/sysV68", nl) == 0)
  50     kernel_u_addr = nl[0].n_value;
  51   else
  52     {
  53       perror ("Cannot get kernel u area address");
  54       exit (1);
  55     }
  56 }