gdb/config/i386/tm-i386v.h

   1 /* Macro definitions for i386, Unix System V.
   2    Copyright 1986, 1987, 1989, 1991, 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 #ifndef TM_I386V_H
  21 #define TM_I386V_H 1
  22
  23 /* First pick up the generic *86 target file. */
  24
  25 #include "i386/tm-i386.h"
  26
  27 /* Number of traps that happen between exec'ing the shell to run an
  28    inferior, and when we finally get to the inferior code.  This is
  29    2 on most implementations.  Override here to 4. */
  30
  31 #undef  START_INFERIOR_TRAPS_EXPECTED
  32 #define START_INFERIOR_TRAPS_EXPECTED 4
  33
  34 /* Number of machine registers */
  35
  36 #undef  NUM_REGS
  37 #define NUM_REGS 16
  38
  39 /* Initializer for an array of names of registers.
  40    There should be NUM_REGS strings in this initializer.  */
  41
  42 /* the order of the first 8 registers must match the compiler's
  43  * numbering scheme (which is the same as the 386 scheme)
  44  * also, this table must match regmap in i386-pinsn.c.
  45  */
  46
  47 #undef  REGISTER_NAMES
  48 #define REGISTER_NAMES { "eax", "ecx", "edx", "ebx", \
  49                          "esp", "ebp", "esi", "edi", \
  50                          "eip", "ps", "cs", "ss", \
  51                          "ds", "es", "fs", "gs", \
  52                          }
  53
  54 /* Total amount of space needed to store our copies of the machine's
  55    register state, the array `registers'.  */
  56
  57 #undef  REGISTER_BYTES
  58 #define REGISTER_BYTES (NUM_REGS * 4)
  59
  60 /* Index within `registers' of the first byte of the space for
  61    register N.  */
  62
  63 #undef  REGISTER_BYTE
  64 #define REGISTER_BYTE(N) ((N)*4)
  65
  66 /* Number of bytes of storage in the actual machine representation
  67    for register N.  */
  68
  69 #undef  REGISTER_RAW_SIZE
  70 #define REGISTER_RAW_SIZE(N) (4)
  71
  72 /* Number of bytes of storage in the program's representation
  73    for register N. */
  74
  75 #undef  REGISTER_VIRTUAL_SIZE
  76 #define REGISTER_VIRTUAL_SIZE(N) (4)
  77
  78 /* Largest value REGISTER_RAW_SIZE can have.  */
  79
  80 #undef  MAX_REGISTER_RAW_SIZE
  81 #define MAX_REGISTER_RAW_SIZE 4
  82
  83 /* Largest value REGISTER_VIRTUAL_SIZE can have.  */
  84
  85 #undef  MAX_REGISTER_VIRTUAL_SIZE
  86 #define MAX_REGISTER_VIRTUAL_SIZE 4
  87
  88 /* Return the GDB type object for the "standard" data type
  89    of data in register N.  */
  90 /* Perhaps si and di should go here, but potentially they could be
  91    used for things other than address.  */
  92
  93 #undef  REGISTER_VIRTUAL_TYPE
  94 #define REGISTER_VIRTUAL_TYPE(N) \
  95   ((N) == PC_REGNUM || (N) == FP_REGNUM || (N) == SP_REGNUM ?         \
  96    lookup_pointer_type (builtin_type_void) : builtin_type_int)
  97
  98 /* Store the address of the place in which to copy the structure the
  99    subroutine will return.  This is called from call_function. */
 100
 101 #undef  STORE_STRUCT_RETURN
 102 #define STORE_STRUCT_RETURN(ADDR, SP) \
 103   { char buf[REGISTER_SIZE];    \
 104     (SP) -= sizeof (ADDR);      \
 105     store_address (buf, sizeof (ADDR), ADDR);   \
 106     write_memory ((SP), buf, sizeof (ADDR)); }
 107
 108 /* Extract from an array REGBUF containing the (raw) register state
 109    a function return value of type TYPE, and copy that, in virtual format,
 110    into VALBUF.  */
 111
 112 #undef  EXTRACT_RETURN_VALUE
 113 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
 114   memcpy ((VALBUF), (REGBUF), TYPE_LENGTH (TYPE))
 115
 116 /* Write into appropriate registers a function return value
 117    of type TYPE, given in virtual format.  */
 118
 119 #undef  STORE_RETURN_VALUE
 120 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
 121   write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
 122
 123 \f
 124 /* Describe the pointer in each stack frame to the previous stack frame
 125    (its caller).  */
 126
 127 /* FRAME_CHAIN takes a frame's nominal address
 128    and produces the frame's chain-pointer. */
 129
 130 #undef  FRAME_CHAIN
 131 #define FRAME_CHAIN(thisframe) \
 132   (!inside_entry_file ((thisframe)->pc) ? \
 133    read_memory_integer ((thisframe)->frame, 4) :\
 134    0)
 135
 136 /* Define other aspects of the stack frame.  */
 137
 138 /* A macro that tells us whether the function invocation represented
 139    by FI does not have a frame on the stack associated with it.  If it
 140    does not, FRAMELESS is set to 1, else 0.  */
 141
 142 #undef  FRAMELESS_FUNCTION_INVOCATION
 143 #define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
 144   (FRAMELESS) = frameless_look_for_prologue(FI)
 145
 146 #undef  FRAME_SAVED_PC
 147 #define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))
 148
 149 /* Return number of args passed to a frame.
 150    Can return -1, meaning no way to tell.  */
 151
 152 #undef  FRAME_NUM_ARGS
 153 #define FRAME_NUM_ARGS(numargs, fi) (numargs) = -1
 154
 155 #ifdef __STDC__         /* Forward decl's for prototypes */
 156 struct frame_info;
 157 struct frame_saved_regs;
 158 #endif
 159
 160 extern int
 161 i386_frame_num_args PARAMS ((struct frame_info *));
 162
 163 #endif  /* ifndef TM_I386V_H */