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,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #ifndef TM_I386V_H
  22 #define TM_I386V_H 1
  23
  24 /* First pick up the generic *86 target file. */
  25
  26 #include "i386/tm-i386.h"
  27
  28 /* Number of traps that happen between exec'ing the shell to run an
  29    inferior, and when we finally get to the inferior code.  This is
  30    2 on most implementations.  Override here to 4. */
  31
  32 #undef  START_INFERIOR_TRAPS_EXPECTED
  33 #define START_INFERIOR_TRAPS_EXPECTED 4
  34
  35 #undef  STORE_STRUCT_RETURN
  36 #define STORE_STRUCT_RETURN(ADDR, SP) \
  37   { char buf[REGISTER_SIZE];    \
  38     (SP) -= sizeof (ADDR);      \
  39     store_address (buf, sizeof (ADDR), ADDR);   \
  40     write_memory ((SP), buf, sizeof (ADDR)); }
  41
  42 /* Extract from an array REGBUF containing the (raw) register state
  43    a function return value of type TYPE, and copy that, in virtual format,
  44    into VALBUF.  */
  45
  46 #undef  EXTRACT_RETURN_VALUE
  47 #define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
  48   memcpy ((VALBUF), (REGBUF), TYPE_LENGTH (TYPE))
  49
  50 /* Write into appropriate registers a function return value
  51    of type TYPE, given in virtual format.  */
  52
  53 #undef  STORE_RETURN_VALUE
  54 #define STORE_RETURN_VALUE(TYPE,VALBUF) \
  55   write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
  56 \f
  57
  58 /* Describe the pointer in each stack frame to the previous stack frame
  59    (its caller).  */
  60
  61 /* FRAME_CHAIN takes a frame's nominal address
  62    and produces the frame's chain-pointer. */
  63
  64 #undef  FRAME_CHAIN
  65 #define FRAME_CHAIN(thisframe) \
  66   (!inside_entry_file ((thisframe)->pc) ? \
  67    read_memory_integer ((thisframe)->frame, 4) :\
  68    0)
  69
  70 /* Define other aspects of the stack frame.  */
  71
  72 /* A macro that tells us whether the function invocation represented
  73    by FI does not have a frame on the stack associated with it.  If it
  74    does not, FRAMELESS is set to 1, else 0.  */
  75
  76 #undef  FRAMELESS_FUNCTION_INVOCATION
  77 #define FRAMELESS_FUNCTION_INVOCATION(FI) \
  78   (frameless_look_for_prologue (FI))
  79
  80 #undef  FRAME_SAVED_PC
  81 #define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))
  82
  83 /* Return number of args passed to a frame.
  84    Can return -1, meaning no way to tell.  */
  85
  86 #undef  FRAME_NUM_ARGS
  87 #define FRAME_NUM_ARGS(fi) (-1)
  88
  89 /* Forward decl's for prototypes */
  90 struct frame_info;
  91 struct frame_saved_regs;
  92
  93 extern int
  94 i386_frame_num_args PARAMS ((struct frame_info *));
  95
  96 #endif /* ifndef TM_I386V_H */