gdb/config/i386/tm-go32.h

   1 /* Target-dependent definitions for Intel x86 running DJGPP.
   2    Copyright 1995, 1996, 1997 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., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include "i386/tm-i386v.h"
  22
  23 /* Number of machine registers. */
  24
  25 #undef NUM_FREGS
  26 #define NUM_FREGS 15
  27 #undef NUM_REGS
  28 #define NUM_REGS (16+NUM_FREGS)
  29
  30 /* Initializer for an array of names of registers.  There should be
  31    NUM_REGS strings in this initializer.  */
  32
  33 /* The order of the first 8 registers must match the compiler's
  34    numbering scheme (which is the same as the 386 scheme).  */
  35
  36 #undef REGISTER_NAMES
  37 #define REGISTER_NAMES { "eax",  "ecx",   "edx",  "ebx",  \
  38                          "esp",  "ebp",   "esi",  "edi",  \
  39                          "eip",  "eflags","cs",   "ss",   \
  40                          "ds",   "es",    "fs",   "gs",   \
  41                          "st0",  "st1",   "st2",  "st3",  \
  42                          "st4",  "st5",   "st6",  "st7",  \
  43                          "fctrl","fstat", "ftag", "fcs",  \
  44                          "fopsel","fip",  "fopoff" }
  45
  46 #undef FP_REGNUM
  47 #define FP_REGNUM  5            /* (ebp) Contains addr of stack frame */
  48 #undef  SP_REGNUM
  49 #define SP_REGNUM  4            /* (usp) Contains address of top of stack */
  50 #undef  PS_REGNUM
  51 #define PS_REGNUM  9            /* (ps)  Contains processor status */
  52 #undef  PC_REGNUM
  53 #define PC_REGNUM  8            /* (eip) Contains program counter */
  54 #undef  FP0_REGNUM
  55 #define FP0_REGNUM 16           /* Floating point register 0 */
  56 #undef  FPC_REGNUM
  57 #define FPC_REGNUM 24           /* 80387 control register */
  58 #undef  FPCWD_REGNUM
  59 #define FPCWD_REGNUM FPC_REGNUM
  60 #undef  FPSWD_REGNUM
  61 #define FPSWD_REGNUM 25         /* 80387 status register */
  62 #undef  FPTWD_REGNUM
  63 #define FPTWD_REGNUM 26         /* 80387 tag register */
  64 #undef  FPIPO_REGNUM
  65 #define FPIPO_REGNUM 29         /* 80387 instruction pointer offset reg */
  66 #undef  FPIPS_REGNUM
  67 #define FPIPS_REGNUM 27         /* 80387 instruction pointer selector reg */
  68 #undef  FPOOS_REGNUM
  69 #define FPOOS_REGNUM 30         /* 80387 operand pointer offset reg */
  70 #undef  FPOPS_REGNUM
  71 #define FPOPS_REGNUM 28         /* 80387 operand pointer selector reg */
  72
  73 /* Total amount of space needed to store our copies of the machine's
  74    register state, the array `registers'.  */
  75
  76 #undef REGISTER_BYTES
  77 #define REGISTER_BYTES (10*4 + 6*2 + 8*10 + 5*2 + 2*4)
  78
  79 /* Index within `registers' of the first byte of the space for
  80    register N.  */
  81
  82 #undef REGISTER_BYTE
  83 #define REGBYTE_0  0
  84 #define REGBYTE_10 (REGBYTE_0+10*4)
  85 #define REGBYTE_16 (REGBYTE_10+6*2)
  86 #define REGBYTE_24 (REGBYTE_16+8*10)
  87 #define REGBYTE_29 (REGBYTE_24+5*2)
  88 #define REGISTER_BYTE(N) (((N) < 10) ? (N) * 4 : \
  89                           (N) < 16 ? REGBYTE_10 +((N) - 10) * 2 : \
  90                           (N) < 24 ? REGBYTE_16 +((N) - 16) * 10 : \
  91                           (N) < 29 ? REGBYTE_24 +((N) - 24) * 2 : \
  92                           REGBYTE_29 + ((N) - 29) * 4)
  93
  94 /* Number of bytes of storage in the actual machine representation
  95    for register N.  */
  96
  97 #undef REGISTER_RAW_SIZE
  98 #define REGISTER_RAW_SIZE(N) ((N) < 10 ? 4 : (N) < 16 ? 2 : (N) < 24 ? 10 : \
  99                               (N) < 29 ? 2 : 4)
 100
 101 /* Number of bytes of storage in the program's representation
 102    for register N. */
 103
 104 #undef REGISTER_VIRTUAL_SIZE
 105 #define REGISTER_VIRTUAL_SIZE(N) REGISTER_RAW_SIZE(N)
 106
 107 /* Largest value REGISTER_RAW_SIZE can have.  */
 108
 109 #undef MAX_REGISTER_RAW_SIZE
 110 #define MAX_REGISTER_RAW_SIZE 10
 111
 112 /* Largest value REGISTER_VIRTUAL_SIZE can have.  */
 113
 114 #undef MAX_REGISTER_VIRTUAL_SIZE
 115 #define MAX_REGISTER_VIRTUAL_SIZE 10
 116
 117 /* Nonzero if register N requires conversion
 118    from raw format to virtual format.  */
 119
 120 #undef REGISTER_CONVERTIBLE
 121 #define REGISTER_CONVERTIBLE(N) ((N) < FP0_REGNUM ? 0 :\
 122                                  (N) < FPC_REGNUM ? 1 : 0)
 123
 124 /* The host and target are i386 machines and the compiler supports
 125    long doubles. Long doubles on the host therefore have the same
 126    layout as a 387 FPU stack register. */
 127
 128 #if defined(HAVE_LONG_DOUBLE) && defined(HOST_I386)
 129 #undef LD_I387
 130 #define LD_I387
 131 #endif
 132
 133 /* Allow floating point numbers to be specified by a raw long double
 134    10 hex bytes number, e.g. 1.0 can be input as
 135    0x3fff8000000000000000 */
 136
 137 #ifdef LD_I387
 138 #define HEX_LONG_DOUBLE_INPUT(base,p,len,target) \
 139   ((base) == 16 && (len) == 20 \
 140    && i387_hex_long_double_input ((p), (target)))
 141 #endif
 142
 143 extern int i387_hex_long_double_input (char *p, long double *putithere);
 144
 145 #undef REGISTER_CONVERT_TO_VIRTUAL
 146 #ifdef LD_I387
 147 #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
 148 { \
 149   if (TYPE == REGISTER_VIRTUAL_TYPE (REGNUM)) \
 150     { \
 151       memcpy (TO, FROM, TYPE_LENGTH (TYPE)); \
 152     } \
 153   else \
 154     { \
 155       long double val = *((long double *)FROM); \
 156       store_floating ((TO), TYPE_LENGTH (TYPE), val); \
 157     } \
 158 }
 159 #else
 160 /* Convert data from raw format for register REGNUM in buffer FROM to
 161    virtual format with type TYPE in buffer TO.  */
 162 #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
 163 { \
 164   double val; \
 165   i387_to_double ((FROM), (char *)&val); \
 166   store_floating ((TO), TYPE_LENGTH (TYPE), val); \
 167 }
 168 #endif
 169
 170 extern void i387_to_double PARAMS ((char *, char *));
 171
 172 #undef REGISTER_CONVERT_TO_RAW
 173 #ifdef LD_I387
 174 #define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
 175 { \
 176   if (TYPE == REGISTER_VIRTUAL_TYPE (REGNUM)) \
 177     { \
 178       memcpy (TO, FROM, TYPE_LENGTH (TYPE)); \
 179     } \
 180   else \
 181     { \
 182       long double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \
 183       *((long double *)TO) = val; \
 184     } \
 185 }
 186 #else
 187 #define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
 188 { \
 189   double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \
 190   double_to_i387((char *)&val, (TO)); \
 191 }
 192 #endif
 193
 194 extern void double_to_i387 PARAMS ((char *, char *));
 195
 196 /* Return the GDB type object for the "standard" data type of data in
 197    register N.  */
 198
 199 #undef REGISTER_VIRTUAL_TYPE
 200 #ifdef LD_I387
 201 #define REGISTER_VIRTUAL_TYPE(N) \
 202   ((N < FP0_REGNUM) ? builtin_type_int : \
 203    (N < FPC_REGNUM) ? builtin_type_long_double : builtin_type_int)
 204 #else
 205 #define REGISTER_VIRTUAL_TYPE(N) \
 206   ((N < FP0_REGNUM) ? builtin_type_int : \
 207    (N < FPC_REGNUM) ? builtin_type_double : builtin_type_int)
 208 #endif
 209
 210 #undef TARGET_LONG_DOUBLE_BIT
 211 #define TARGET_LONG_DOUBLE_BIT 96