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 "defs.h"
  21 #include "frame.h"
  22 #include "inferior.h"
  23
  24 /* Defining this means some system include files define some extra stuff.  */
  25 #define WOPR
  26 #include <sys/param.h>
  27 #include <sys/dir.h>
  28 #include <signal.h>
  29 #include <sys/user.h>
  30 #include <sys/ioctl.h>
  31 #include <fcntl.h>
  32
  33 #include <sys/ptrace.h>
  34 #include <sys/reg.h>
  35 #include <sys/trap.h>
  36
  37 #include "gdbcore.h"
  38
  39 #include <sys/file.h>
  40 #include <sys/stat.h>
  41
  42 #define INFERIOR_AR0(u)                                                 \
  43   ((ptrace                                                              \
  44     (PT_RUAREA, inferior_pid, ((char *) &u.u_ar0 - (char *) &u), 0))    \
  45    - KERNEL_U_ADDR)
  46
  47 static void
  48 fetch_inferior_register (regno, regaddr)
  49      register int regno;
  50      register unsigned int regaddr;
  51 {
  52 #ifndef HPUX_VERSION_5
  53   if (regno == PS_REGNUM)
  54     {
  55       union { int i; short s[2]; } ps_val;
  56       int regval;
  57
  58       ps_val.i = (ptrace (PT_RUAREA, inferior_pid, regaddr, 0));
  59       regval = ps_val.s[0];
  60       supply_register (regno, &regval);
  61     }
  62   else
  63 #endif /* not HPUX_VERSION_5 */
  64     {
  65       char buf[MAX_REGISTER_RAW_SIZE];
  66       register int i;
  67
  68       for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
  69         {
  70           *(int *) &buf[i] = ptrace (PT_RUAREA, inferior_pid, regaddr, 0);
  71           regaddr += sizeof (int);
  72         }
  73       supply_register (regno, buf);
  74     }
  75   return;
  76 }
  77
  78 static void
  79 store_inferior_register_1 (regno, regaddr, value)
  80      int regno;
  81      unsigned int regaddr;
  82      int value;
  83 {
  84   errno = 0;
  85   ptrace (PT_WUAREA, inferior_pid, regaddr, value);
  86 #if 0
  87   /* HP-UX randomly sets errno to non-zero for regno == 25.
  88      However, the value is correctly written, so ignore errno. */
  89   if (errno != 0)
  90     {
  91       char string_buf[64];
  92
  93       sprintf (string_buf, "writing register number %d", regno);
  94       perror_with_name (string_buf);
  95     }
  96 #endif
  97   return;
  98 }
  99
 100 static void
 101 store_inferior_register (regno, regaddr)
 102      register int regno;
 103      register unsigned int regaddr;
 104 {
 105 #ifndef HPUX_VERSION_5
 106   if (regno == PS_REGNUM)
 107     {
 108       union { int i; short s[2]; } ps_val;
 109
 110       ps_val.i = (ptrace (PT_RUAREA, inferior_pid, regaddr, 0));
 111       ps_val.s[0] = (read_register (regno));
 112       store_inferior_register_1 (regno, regaddr, ps_val.i);
 113     }
 114   else
 115 #endif /* not HPUX_VERSION_5 */
 116     {
 117       char buf[MAX_REGISTER_RAW_SIZE];
 118       register int i;
 119       extern char registers[];
 120
 121       for (i = 0; i < REGISTER_RAW_SIZE (regno); i += sizeof (int))
 122         {
 123           store_inferior_register_1
 124             (regno, regaddr,
 125              (*(int *) &registers[(REGISTER_BYTE (regno)) + i]));
 126           regaddr += sizeof (int);
 127         }
 128     }
 129   return;
 130 }
 131
 132 void
 133 fetch_inferior_registers (regno)
 134      int regno;
 135 {
 136   struct user u;
 137   register unsigned int ar0_offset;
 138
 139   ar0_offset = (INFERIOR_AR0 (u));
 140   if (regno == -1)
 141     {
 142       for (regno = 0; (regno < FP0_REGNUM); regno++)
 143         fetch_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
 144       for (; (regno < NUM_REGS); regno++)
 145         fetch_inferior_register (regno, (FP_REGISTER_ADDR (u, regno)));
 146     }
 147   else
 148     fetch_inferior_register (regno,
 149                              (regno < FP0_REGNUM
 150                               ? REGISTER_ADDR (ar0_offset, regno)
 151                               : FP_REGISTER_ADDR (u, regno)));
 152 }
 153
 154 /* Store our register values back into the inferior.
 155    If REGNO is -1, do this for all registers.
 156    Otherwise, REGNO specifies which register (so we can save time).  */
 157
 158 void
 159 store_inferior_registers (regno)
 160      register int regno;
 161 {
 162   struct user u;
 163   register unsigned int ar0_offset;
 164   extern char registers[];
 165
 166   if (regno >= FP0_REGNUM)
 167     {
 168       store_inferior_register (regno, (FP_REGISTER_ADDR (u, regno)));
 169       return;
 170     }
 171
 172   ar0_offset = (INFERIOR_AR0 (u));
 173   if (regno >= 0)
 174     {
 175       store_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
 176       return;
 177     }
 178
 179   for (regno = 0; (regno < FP0_REGNUM); regno++)
 180     store_inferior_register (regno, (REGISTER_ADDR (ar0_offset, regno)));
 181   for (; (regno < NUM_REGS); regno++)
 182     store_inferior_register (regno, (FP_REGISTER_ADDR (u, regno)));
 183   return;
 184 }
 185
 186 \f
 187 /* Take the register values out of a core file and store
 188    them where `read_register' will find them.  */
 189
 190 #ifdef HPUX_VERSION_5
 191 #define e_PS e_regs[PS]
 192 #define e_PC e_regs[PC]
 193 #endif /* HPUX_VERSION_5 */
 194
 195 void
 196 fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
 197      char *core_reg_sect;
 198      int core_reg_size;
 199      int which;
 200      unsigned int reg_addr;     /* Unused in this version */
 201 {
 202   int val, regno;
 203   struct user u;
 204   struct exception_stack *pes = (struct exception_stack *) core_reg_sect;
 205 #define es (*pes)
 206   char *buf;
 207
 208   if (which == 0) {
 209     if (core_reg_size <
 210                   ((char *) &es.e_offset - (char *) &es.e_regs[R0]))
 211           error ("Not enough registers in core file");
 212     for (regno = 0; (regno < PS_REGNUM); regno++)
 213       supply_register (regno, &es.e_regs[regno + R0]);
 214     val = es.e_PS;
 215     supply_register (regno++, &val);
 216     supply_register (regno++, &es.e_PC);
 217
 218   } else if (which == 2) {
 219
 220     /* FIXME: This may not work if the float regs and control regs are
 221        discontinuous.  */
 222     for (regno = FP0_REGNUM, buf = core_reg_sect;
 223          (regno < NUM_REGS);
 224          buf += REGISTER_RAW_SIZE (regno), regno++)
 225       {
 226         supply_register (regno, buf);
 227       }
 228   }
 229 }