gdb/hp300ux-xdep.c

   1 /* HP/UX interface for HP 300's, for GDB when running under Unix.
   2    Copyright (C) 1986, 1987, 1989, 1991 Free Software Foundation, Inc.
   3
   4 This file is part of GDB.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
  19
  20 #include <stdio.h>
  21 #include "defs.h"
  22 #include "frame.h"
  23 #include "inferior.h"
  24
  25 /* Defining this means some system include files define some extra stuff.  */
  26 #define WOPR
  27 #include <sys/param.h>
  28 #include <sys/dir.h>
  29 #include <signal.h>
  30 #include <sys/user.h>
  31 #include <sys/ioctl.h>
  32 #include <fcntl.h>
  33
  34 #include <sys/ptrace.h>
  35 #include <sys/reg.h>
  36 #include <sys/trap.h>
  37
  38 #include "gdbcore.h"
  39
  40 #include <sys/file.h>
  41 #include <sys/stat.h>
  42
  43 #define INFERIOR_AR0(u)                                                 \
  44   ((ptrace                                                              \
  45     (PT_RUAREA, inferior_pid, ((char *) &u.u_ar0 - (char *) &u), 0))    \
  46    - KERNEL_U_ADDR)
  47
  48 static void
  49 fetch_inferior_register (regno, regaddr)
  50      register int regno;
  51      register unsigned int regaddr;
  52 {
  53 #ifndef HPUX_VERSION_5
  54   if (regno == PS_REGNUM)
  55     {
  56       union { int i; short s[2]; } ps_val;
  57       int regval;
  58
  59       ps_val.i = (ptrace (PT_RUAREA, inferior_pid, regaddr, 0));
  60       regval = ps_val.s[0];
  61       supply_register (regno, &regval);
  62     }
  63   else
  64 #endif /* not HPUX_VERSION_5 */
  65     {
  66       char buf[MAX_REGISTER_RAW_SIZE];
  67       register int i;
  68
  69       for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
  70         {
  71           *(int *) &buf[i] = ptrace (PT_RUAREA, inferior_pid, regaddr, 0);
  72           regaddr += sizeof (int);
  73         }
  74       supply_register (regno, buf);
  75     }
  76   return;
  77 }
  78
  79 static void
  80 store_inferior_register_1 (regno, regaddr, value)
  81      int regno;
  82      unsigned int regaddr;
  83      int value;
  84 {
  85   errno = 0;
  86   ptrace (PT_WUAREA, inferior_pid, regaddr, value);
  87 #if 0
  88   /* HP-UX randomly sets errno to non-zero for regno == 25.
  89      However, the value is correctly written, so ignore errno. */
  90   if (errno != 0)
  91     {
  92       char string_buf[64];
  93
  94       sprintf (string_buf, "writing register number %d", regno);
  95       perror_with_name (string_buf);
  96     }
  97 #endif
  98   return;
  99 }
 100
 101 static void
 102 store_inferior_register (regno, regaddr)
 103      register int regno;
 104      register unsigned int regaddr;
 105 {
 106 #ifndef HPUX_VERSION_5
 107   if (regno == PS_REGNUM)
 108     {
 109       union { int i; short s[2]; } ps_val;
 110
 111       ps_val.i = (ptrace (PT_RUAREA, inferior_pid, regaddr, 0));
 112       ps_val.s[0] = (read_register (regno));
 113       store_inferior_register_1 (regno, regaddr, ps_val.i);
 114     }
 115   else
 116 #endif /* not HPUX_VERSION_5 */
 117     {
 118       char buf[MAX_REGISTER_RAW_SIZE];
 119       register int i;
 120       extern char registers[];
 121
 122       for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
 123         {
 124           store_inferior_register_1
 125             (regno, regaddr,
 126              (*(int *) &registers[(REGISTER_BYTE (regno)) + i]));
 127           regaddr += sizeof (int);
 128         }
 129     }
 130   return;
 131 }
 132
 133 void
 134 fetch_inferior_registers (regno)
 135      int regno;
 136 {
 137   struct user u;
 138   register unsigned int ar0_offset;
 139
 140   ar0_offset = (INFERIOR_AR0 (u));
 141   if (regno == -1)
 142     {
 143       for (regno = 0; (regno < FP0_REGNUM); regno++)
 144         fetch_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
 145       for (; (regno < NUM_REGS); regno++)
 146         fetch_inferior_register (regno, (FP_REGISTER_ADDR (u, regno)));
 147     }
 148   else
 149     fetch_inferior_register (regno,
 150                              (regno < FP0_REGNUM
 151                               ? REGISTER_ADDR (ar0_offset, regno)
 152                               : FP_REGISTER_ADDR (u, regno)));
 153 }
 154
 155 /* Store our register values back into the inferior.
 156    If REGNO is -1, do this for all registers.
 157    Otherwise, REGNO specifies which register (so we can save time).  */
 158
 159 void
 160 store_inferior_registers (regno)
 161      register int regno;
 162 {
 163   struct user u;
 164   register unsigned int ar0_offset;
 165   extern char registers[];
 166
 167   if (regno >= FP0_REGNUM)
 168     {
 169       store_inferior_register (regno, (FP_REGISTER_ADDR (u, regno)));
 170       return;
 171     }
 172
 173   ar0_offset = (INFERIOR_AR0 (u));
 174   if (regno >= 0)
 175     {
 176       store_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
 177       return;
 178     }
 179
 180   for (regno = 0; (regno < FP0_REGNUM); regno++)
 181     store_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
 182   for (; (regno < NUM_REGS); regno++)
 183     store_inferior_register (regno, (FP_REGISTER_ADDR (u, regno)));
 184   return;
 185 }
 186
 187 \f
 188 /* Take the register values out of a core file and store
 189    them where `read_register' will find them.  */
 190
 191 #ifdef HPUX_VERSION_5
 192 #define e_PS e_regs[PS]
 193 #define e_PC e_regs[PC]
 194 #endif /* HPUX_VERSION_5 */
 195
 196 void
 197 fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
 198      char *core_reg_sect;
 199      int core_reg_size;
 200      int which;
 201      unsigned int reg_addr;     /* Unused in this version */
 202 {
 203   int val, regno;
 204   struct user u;
 205   struct exception_stack *pes = (struct exception_stack *) core_reg_sect;
 206 #define es (*pes)
 207   char *buf;
 208
 209   if (which == 0) {
 210     if (core_reg_size <
 211                   ((char *) &es.e_offset - (char *) &es.e_regs[R0]))
 212           error ("Not enough registers in core file");
 213     for (regno = 0; (regno < PS_REGNUM); regno++)
 214       supply_register (regno, &es.e_regs[regno + R0]);
 215     val = es.e_PS;
 216     supply_register (regno++, &val);
 217     supply_register (regno++, &es.e_PC);
 218
 219   } else if (which == 2) {
 220
 221     /* FIXME: This may not work if the float regs and control regs are
 222        discontinuous.  */
 223     for (regno = FP0_REGNUM, buf = core_reg_sect;
 224          (regno < NUM_REGS);
 225          buf += REGISTER_RAW_SIZE (regno), regno++)
 226       {
 227         supply_register (regno, buf);
 228       }
 229   }
 230 }