gdb/config/i386/tm-i386v.h

   1 /* Macro definitions for i386, Unix System V.
   2    Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1998, 1999,
   3    2000, 2001 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, write to the Free Software
  19    Foundation, Inc., 59 Temple Place - Suite 330,
  20    Boston, MA 02111-1307, USA.  */
  21
  22 #ifndef TM_I386V_H
  23 #define TM_I386V_H 1
  24
  25 /* First pick up the generic *86 target file. */
  26
  27 #include "regcache.h"
  28 #include "i386/tm-i386.h"
  29
  30 /* Number of traps that happen between exec'ing the shell to run an
  31    inferior, and when we finally get to the inferior code.  This is
  32    2 on most implementations.  Override here to 4. */
  33
  34 #undef  START_INFERIOR_TRAPS_EXPECTED
  35 #define START_INFERIOR_TRAPS_EXPECTED 4
  36
  37 /* Extract from an array REGBUF containing the (raw) register state
  38    a function return value of type TYPE, and copy that, in virtual format,
  39    into VALBUF.  */
  40
  41 #undef  EXTRACT_RETURN_VALUE
  42 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
  43   memcpy ((VALBUF), (REGBUF), TYPE_LENGTH (TYPE))
  44
  45 /* Write into appropriate registers a function return value
  46    of type TYPE, given in virtual format.  */
  47
  48 #undef  STORE_RETURN_VALUE
  49 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
  50   write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
  51 \f
  52
  53 /* Describe the pointer in each stack frame to the previous stack frame
  54    (its caller).  */
  55
  56 /* FRAME_CHAIN takes a frame's nominal address
  57    and produces the frame's chain-pointer. */
  58
  59 #undef  FRAME_CHAIN
  60 #define FRAME_CHAIN(thisframe) \
  61   (!inside_entry_file ((thisframe)->pc) ? \
  62    read_memory_integer ((thisframe)->frame, 4) :\
  63    0)
  64
  65 /* Define other aspects of the stack frame.  */
  66
  67 /* A macro that tells us whether the function invocation represented
  68    by FI does not have a frame on the stack associated with it.  If it
  69    does not, FRAMELESS is set to 1, else 0.  */
  70
  71 #undef  FRAMELESS_FUNCTION_INVOCATION
  72 #define FRAMELESS_FUNCTION_INVOCATION(FI) \
  73   (frameless_look_for_prologue (FI))
  74
  75 #undef  FRAME_SAVED_PC
  76 #define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))
  77
  78 /* Return number of args passed to a frame.
  79    Can return -1, meaning no way to tell.  */
  80
  81 #undef  FRAME_NUM_ARGS
  82 #define FRAME_NUM_ARGS(fi) (-1)
  83
  84 #endif /* ifndef TM_I386V_H */