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/* Macro definitions for i386, Unix System V.
Copyright 1986, 1987, 1989, 1991, 1992, 1993 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#ifndef TM_I386V_H
#define TM_I386V_H 1
/* First pick up the generic *86 target file. */
#include "i386/tm-i386.h"
/* Number of traps that happen between exec'ing the shell to run an
inferior, and when we finally get to the inferior code. This is
2 on most implementations. Override here to 4. */
#undef START_INFERIOR_TRAPS_EXPECTED
#define START_INFERIOR_TRAPS_EXPECTED 4
/* Number of machine registers */
#undef NUM_REGS
#define NUM_REGS 16
/* Initializer for an array of names of registers.
There should be NUM_REGS strings in this initializer. */
/* the order of the first 8 registers must match the compiler's
* numbering scheme (which is the same as the 386 scheme)
* also, this table must match regmap in i386-pinsn.c.
*/
#undef REGISTER_NAMES
#define REGISTER_NAMES { "eax", "ecx", "edx", "ebx", \
"esp", "ebp", "esi", "edi", \
"eip", "ps", "cs", "ss", \
"ds", "es", "fs", "gs", \
}
/* Total amount of space needed to store our copies of the machine's
register state, the array `registers'. */
#undef REGISTER_BYTES
#define REGISTER_BYTES (NUM_REGS * 4)
/* Index within `registers' of the first byte of the space for
register N. */
#undef REGISTER_BYTE
#define REGISTER_BYTE(N) ((N)*4)
/* Number of bytes of storage in the actual machine representation
for register N. */
#undef REGISTER_RAW_SIZE
#define REGISTER_RAW_SIZE(N) (4)
/* Number of bytes of storage in the program's representation
for register N. */
#undef REGISTER_VIRTUAL_SIZE
#define REGISTER_VIRTUAL_SIZE(N) (4)
/* Largest value REGISTER_RAW_SIZE can have. */
#undef MAX_REGISTER_RAW_SIZE
#define MAX_REGISTER_RAW_SIZE 4
/* Largest value REGISTER_VIRTUAL_SIZE can have. */
#undef MAX_REGISTER_VIRTUAL_SIZE
#define MAX_REGISTER_VIRTUAL_SIZE 4
/* Return the GDB type object for the "standard" data type
of data in register N. */
/* Perhaps si and di should go here, but potentially they could be
used for things other than address. */
#undef REGISTER_VIRTUAL_TYPE
#define REGISTER_VIRTUAL_TYPE(N) \
((N) == PC_REGNUM || (N) == FP_REGNUM || (N) == SP_REGNUM ? \
lookup_pointer_type (builtin_type_void) : builtin_type_int)
/* Store the address of the place in which to copy the structure the
subroutine will return. This is called from call_function. */
#undef STORE_STRUCT_RETURN
#define STORE_STRUCT_RETURN(ADDR, SP) \
{ char buf[REGISTER_SIZE]; \
(SP) -= sizeof (ADDR); \
store_address (buf, sizeof (ADDR), ADDR); \
write_memory ((SP), buf, sizeof (ADDR)); }
/* Extract from an array REGBUF containing the (raw) register state
a function return value of type TYPE, and copy that, in virtual format,
into VALBUF. */
#undef EXTRACT_RETURN_VALUE
#define EXTRACT_RETURN_VALUE(TYPE,REGBUF,VALBUF) \
memcpy ((VALBUF), (REGBUF), TYPE_LENGTH (TYPE))
/* Write into appropriate registers a function return value
of type TYPE, given in virtual format. */
#undef STORE_RETURN_VALUE
#define STORE_RETURN_VALUE(TYPE,VALBUF) \
write_register_bytes (0, VALBUF, TYPE_LENGTH (TYPE))
/* Describe the pointer in each stack frame to the previous stack frame
(its caller). */
/* FRAME_CHAIN takes a frame's nominal address
and produces the frame's chain-pointer. */
#undef FRAME_CHAIN
#define FRAME_CHAIN(thisframe) \
(!inside_entry_file ((thisframe)->pc) ? \
read_memory_integer ((thisframe)->frame, 4) :\
0)
/* Define other aspects of the stack frame. */
/* A macro that tells us whether the function invocation represented
by FI does not have a frame on the stack associated with it. If it
does not, FRAMELESS is set to 1, else 0. */
#undef FRAMELESS_FUNCTION_INVOCATION
#define FRAMELESS_FUNCTION_INVOCATION(FI, FRAMELESS) \
(FRAMELESS) = frameless_look_for_prologue(FI)
#undef FRAME_SAVED_PC
#define FRAME_SAVED_PC(FRAME) (read_memory_integer ((FRAME)->frame + 4, 4))
/* Return number of args passed to a frame.
Can return -1, meaning no way to tell. */
#undef FRAME_NUM_ARGS
#define FRAME_NUM_ARGS(numargs, fi) (numargs) = -1
#ifdef __STDC__ /* Forward decl's for prototypes */
struct frame_info;
struct frame_saved_regs;
#endif
extern int
i386_frame_num_args PARAMS ((struct frame_info *));
#endif /* ifndef TM_I386V_H */
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