gdb/tm-hp300hpux.h

   1 /* Parameters for execution on an HP 9000 model 320, for GDB, the GNU debugger.
   2    Copyright (C) 1986, 1987, 1989 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 /* Sequence of bytes for breakpoint instruction.  */
  21
  22 #define BREAKPOINT {0x4e, 0x41}
  23
  24 /* Define this if the C compiler puts an underscore at the front
  25    of external names before giving them to the linker.  */
  26
  27 #define NAMES_HAVE_UNDERSCORE
  28
  29 /* Debugger information will be in DBX format.  */
  30
  31 #define READ_DBX_FORMAT
  32
  33 /* Address of end of stack space.  */
  34
  35 #define STACK_END_ADDR 0xFFF00000
  36 \f
  37 /* Things needed for making the inferior call functions.  */
  38
  39 /* Push an empty stack frame, to record the current PC, etc.  */
  40
  41 #define PUSH_DUMMY_FRAME \
  42 { register CORE_ADDR sp = read_register (SP_REGNUM);                    \
  43   register int regnum;                                                  \
  44   char raw_buffer[12];                                                  \
  45   sp = push_word (sp, read_register (PC_REGNUM));                       \
  46   sp = push_word (sp, read_register (FP_REGNUM));                       \
  47   write_register (FP_REGNUM, sp);                                       \
  48   for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--)         \
  49     { read_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12);     \
  50       sp = push_bytes (sp, raw_buffer, 12); }                           \
  51   for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--)                   \
  52     sp = push_word (sp, read_register (regnum));                        \
  53   sp = push_word (sp, read_register (PS_REGNUM));                       \
  54   write_register (SP_REGNUM, sp);  }
  55
  56 /* Discard from the stack the innermost frame,
  57    restoring all saved registers.  */
  58
  59 #define POP_FRAME  \
  60 { register FRAME frame = get_current_frame ();                   \
  61   register CORE_ADDR fp;                                         \
  62   register int regnum;                                           \
  63   struct frame_saved_regs fsr;                                   \
  64   struct frame_info *fi;                                         \
  65   char raw_buffer[12];                                           \
  66   fi = get_frame_info (frame);                                   \
  67   fp = fi->frame;                                                \
  68   get_frame_saved_regs (fi, &fsr);                               \
  69   for (regnum = FP0_REGNUM + 7; regnum >= FP0_REGNUM; regnum--)  \
  70     if (fsr.regs[regnum])                                        \
  71       { read_memory (fsr.regs[regnum], raw_buffer, 12);          \
  72         write_register_bytes (REGISTER_BYTE (regnum), raw_buffer, 12); }\
  73   for (regnum = FP_REGNUM - 1; regnum >= 0; regnum--)            \
  74     if (fsr.regs[regnum])                                        \
  75       write_register (regnum, read_memory_integer (fsr.regs[regnum], 4)); \
  76   if (fsr.regs[PS_REGNUM])                                       \
  77     write_register (PS_REGNUM, read_memory_integer (fsr.regs[PS_REGNUM], 4)); \
  78   write_register (FP_REGNUM, read_memory_integer (fp, 4));       \
  79   write_register (PC_REGNUM, read_memory_integer (fp + 4, 4));   \
  80   write_register (SP_REGNUM, fp + 8);                            \
  81   flush_cached_frames ();                                        \
  82   set_current_frame (create_new_frame (read_register (FP_REGNUM),\
  83                                        read_pc ()));}
  84
  85 /* This sequence of words is the instructions
  86      fmovem 0xff,-(sp)
  87      moveml 0xfffc,-(sp)
  88      clrw -(sp)
  89      movew ccr,-(sp)
  90      /..* The arguments are pushed at this point by GDB;
  91         no code is needed in the dummy for this.
  92         The CALL_DUMMY_START_OFFSET gives the position of
  93         the following jsr instruction.  *../
  94      jsr @#32323232
  95      addl #69696969,sp
  96      bpt
  97      nop
  98 Note this is 28 bytes.
  99 We actually start executing at the jsr, since the pushing of the
 100 registers is done by PUSH_DUMMY_FRAME.  If this were real code,
 101 the arguments for the function called by the jsr would be pushed
 102 between the moveml and the jsr, and we could allow it to execute through.
 103 But the arguments have to be pushed by GDB after the PUSH_DUMMY_FRAME is done,
 104 and we cannot allow the moveml to push the registers again lest they be
 105 taken for the arguments.  */
 106
 107 #define CALL_DUMMY {0xf227e0ff, 0x48e7fffc, 0x426742e7, 0x4eb93232, 0x3232dffc, 0x69696969, 0x4e414e71}
 108
 109 #define CALL_DUMMY_LENGTH 28
 110
 111 #define CALL_DUMMY_START_OFFSET 12
 112
 113 /* Insert the specified number of args and function address
 114    into a call sequence of the above form stored at DUMMYNAME.  */
 115
 116 #define FIX_CALL_DUMMY(dummyname, pc, fun, nargs, args, type, gcc_p)     \
 117 { *(int *)((char *) dummyname + 20) = nargs * 4;  \
 118   *(int *)((char *) dummyname + 14) = fun; }
 119 \f
 120 #include HAVE_68881
 121
 122 #include "tm-68k.h"