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