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 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 "i386/tm-i386.h"
  28
  29 /* Number of traps that happen between exec'ing the shell to run an
  30    inferior, and when we finally get to the inferior code.  This is
  31    2 on most implementations.  Override here to 4. */
  32
  33 #undef  START_INFERIOR_TRAPS_EXPECTED
  34 #define START_INFERIOR_TRAPS_EXPECTED 4
  35
  36 #undef  STORE_STRUCT_RETURN
  37 #define STORE_STRUCT_RETURN(ADDR, SP) \
  38   { char buf[REGISTER_SIZE];    \
  39     (SP) -= sizeof (ADDR);      \
  40     store_address (buf, sizeof (ADDR), ADDR);   \
  41     write_memory ((SP), buf, sizeof (ADDR)); }
  42
  43 /* Extract from an array REGBUF containing the (raw) register state
  44    a function return value of type TYPE, and copy that, in virtual format,
  45    into VALBUF.  */
  46
  47 #undef  EXTRACT_RETURN_VALUE
  48 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
  49   memcpy ((VALBUF), (REGBUF), TYPE_LENGTH (TYPE))
  50
  51 /* Write into appropriate registers a function return value
  52    of type TYPE, given in virtual format.  */
  53
  54 #undef  STORE_RETURN_VALUE
  55 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
  56   write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
  57 \f
  58
  59 /* Describe the pointer in each stack frame to the previous stack frame
  60    (its caller).  */
  61
  62 /* FRAME_CHAIN takes a frame's nominal address
  63    and produces the frame's chain-pointer. */
  64
  65 #undef  FRAME_CHAIN
  66 #define FRAME_CHAIN(thisframe) \
  67   (!inside_entry_file ((thisframe)->pc) ? \
  68    read_memory_integer ((thisframe)->frame, 4) :\
  69    0)
  70
  71 /* Define other aspects of the stack frame.  */
  72
  73 /* A macro that tells us whether the function invocation represented
  74    by FI does not have a frame on the stack associated with it.  If it
  75    does not, FRAMELESS is set to 1, else 0.  */
  76
  77 #undef  FRAMELESS_FUNCTION_INVOCATION
  78 #define FRAMELESS_FUNCTION_INVOCATION(FI) \
  79   (frameless_look_for_prologue (FI))
  80
  81 #undef  FRAME_SAVED_PC
  82 #define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))
  83
  84 /* Return number of args passed to a frame.
  85    Can return -1, meaning no way to tell.  */
  86
  87 #undef  FRAME_NUM_ARGS
  88 #define FRAME_NUM_ARGS(fi) (-1)
  89
  90 /* Forward decl's for prototypes */
  91 struct frame_info;
  92 struct frame_saved_regs;
  93
  94 extern int i386_frame_num_args (struct frame_info *);
  95
  96 #endif /* ifndef TM_I386V_H */