gdb/config/i386/tm-i386aix.h

   1 /* Macro defintions for IBM AIX PS/2 (i386).
   2    Copyright 1986, 1987, 1989, 1992, 1993 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 /*
  21  * Changes for IBM AIX PS/2 by Minh Tran-Le (tranle@intellicorp.com)
  22  * Revision:     5-May-93 00:11:35
  23  */
  24
  25 #ifndef TM_I386AIX_H
  26 #define TM_I386AIX_H 1
  27
  28 #include "i386/tm-i386v.h"
  29 #include <sys/reg.h>
  30
  31 #ifndef I386
  32 # define I386 1
  33 #endif
  34 #ifndef I386_AIX_TARGET
  35 # define I386_AIX_TARGET 1
  36 #endif
  37
  38 /* number of traps that happen between exec'ing the shell
  39  * to run an inferior, and when we finally get to
  40  * the inferior code.  This is 2 on most implementations.
  41  */
  42 #undef  START_INFERIOR_TRAPS_EXPECTED
  43 #define START_INFERIOR_TRAPS_EXPECTED 2
  44
  45 /* Number of machine registers */
  46 #undef  NUM_REGS
  47 #define NUM_REGS 24 /* 16+8 */
  48
  49 /* Initializer for an array of names of registers.
  50    There should be NUM_REGS strings in this initializer.  */
  51
  52 /* the order of the first 8 registers must match the compiler's
  53  * numbering scheme (which is the same as the 386 scheme)
  54  * also, this table must match regmap in i386-pinsn.c.
  55  */
  56 #undef  REGISTER_NAMES
  57 #define REGISTER_NAMES { "eax", "ecx", "edx", "ebx", \
  58                          "esp", "ebp", "esi", "edi", \
  59                          "eip", "eflags", "cs", "ss", \
  60                          "ds", "es", "fs", "gs", \
  61                          "st0", "st1", "st2", "st3", \
  62                          "st4", "st5", "st6", "st7", \
  63                          }
  64
  65 /* Register numbers of various important registers.
  66    Note that some of these values are "real" register numbers,
  67    and correspond to the general registers of the machine,
  68    and some are "phony" register numbers which are too large
  69    to be actual register numbers as far as the user is concerned
  70    but do serve to get the desired values when passed to read_register.  */
  71
  72 #undef  FP_REGNUM
  73 #define FP_REGNUM 5     /* (ebp) Contains address of executing stack frame */
  74 #undef  SP_REGNUM
  75 #define SP_REGNUM 4     /* (usp) Contains address of top of stack */
  76
  77 #undef  PC_REGNUM
  78 #define PC_REGNUM 8     /* (eip) Contains program counter */
  79 #undef  PS_REGNUM
  80 #define PS_REGNUM 9     /* (eflags) Contains processor status */
  81
  82 #define FP0_REGNUM 16   /*  (st0) 387 register */
  83
  84 /* Total amount of space needed to store our copies of the machine's
  85    register state, the array `registers'.  */
  86 /* 16 i386 registers and 8 i387 registers */
  87 #undef REGISTER_BYTES
  88 #define REGISTER_BYTES (16*4 + 8*10)
  89
  90 /* Index within `registers' of the first byte of the space for
  91    register N.  */
  92 #undef REGISTER_BYTE
  93 #define REGISTER_BYTE(N) \
  94   ((N < FP0_REGNUM) ? (N * 4) : \
  95    (((N - FP0_REGNUM) * 10) + 64))
  96
  97 /* Number of bytes of storage in the actual machine representation
  98  * for register N.  All registers are 4 bytes, except 387 st(0) - st(7),
  99  * which are 80 bits each.
 100  */
 101 #undef REGISTER_RAW_SIZE
 102 #define REGISTER_RAW_SIZE(N) \
 103   ((N < FP0_REGNUM) ? 4 : 10)
 104
 105 /* Largest value REGISTER_RAW_SIZE can have.  */
 106 #undef MAX_REGISTER_RAW_SIZE
 107 #define MAX_REGISTER_RAW_SIZE 10
 108
 109 /* Nonzero if register N requires conversion
 110    from raw format to virtual format.  */
 111 #undef REGISTER_CONVERTIBLE
 112 #define REGISTER_CONVERTIBLE(N) \
 113   ((N < FP0_REGNUM) ? 0 : 1)
 114
 115 /* Convert data from raw format for register REGNUM in buffer FROM
 116    to virtual format with type TYPE in buffer TO.  */
 117
 118 #undef REGISTER_CONVERT_TO_VIRTUAL
 119 #define REGISTER_CONVERT_TO_VIRTUAL(REGNUM,TYPE,FROM,TO) \
 120 { \
 121   double val; \
 122   i387_to_double ((FROM), (char *)&val); \
 123   store_floating ((TO), TYPE_LENGTH (TYPE), val); \
 124 }
 125 extern void
 126 i387_to_double PARAMS ((char *, char *));
 127
 128 /* Convert data from virtual format with type TYPE in buffer FROM
 129    to raw format for register REGNUM in buffer TO.  */
 130
 131 #undef REGISTER_CONVERT_TO_RAW
 132 #define REGISTER_CONVERT_TO_RAW(TYPE,REGNUM,FROM,TO) \
 133 { \
 134   double val = extract_floating ((FROM), TYPE_LENGTH (TYPE)); \
 135   double_to_i387((char *)&val, (TO)))
 136 }
 137 extern void
 138 double_to_i387 PARAMS ((char *, char *));
 139
 140 /* Return the GDB type object for the "standard" data type
 141    of data in register N.  */
 142 #undef REGISTER_VIRTUAL_TYPE
 143 #define REGISTER_VIRTUAL_TYPE(N) \
 144   ((N < FP0_REGNUM) ? builtin_type_int : \
 145    builtin_type_double)
 146
 147 /* Extract from an array REGBUF containing the (raw) register state
 148    a function return value of type TYPE, and copy that, in virtual format,
 149    into VALBUF.  */
 150 #undef  EXTRACT_RETURN_VALUE
 151 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
 152   i386_extract_return_value (TYPE,REGBUF,VALBUF)
 153
 154 /* Write into appropriate registers a function return value
 155    of type TYPE, given in virtual format.  */
 156 #undef STORE_RETURN_VALUE
 157 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
 158   {                                                                          \
 159     if (TYPE_CODE (TYPE) == TYPE_CODE_FLT)                                   \
 160       write_register_bytes (REGISTER_BYTE (FP0_REGNUM), (VALBUF),            \
 161                             TYPE_LENGTH (TYPE));                             \
 162     else                                                                     \
 163       write_register_bytes (0, (VALBUF), TYPE_LENGTH (TYPE));                \
 164   }
 165
 166 #endif /* TM_I386AIX_H */