gcc/config/m88k/sysv3.h

/* Definitions of target machine for GNU compiler.
   Motorola m88100 running the AT&T/Unisoft/Motorola V.3 reference port.
   Copyright (C) 1990, 1991, 1997, 1998, 1999 Free Software Foundation, Inc.
   Contributed by Ray Essick (ressick@mot.com)
   Enhanced by Tom Wood (Tom_Wood@NeXT.com)

This file is part of GNU CC.

GNU CC 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, or (at your option)
any later version.

GNU CC 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 GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

#include "m88k/m88k.h"

/* Default switches */
#undef	TARGET_DEFAULT
#define TARGET_DEFAULT	(MASK_CHECK_ZERO_DIV	| \
			 MASK_OCS_DEBUG_INFO	| \
			 MASK_OCS_FRAME_POSITION)

/* Macros to be automatically defined.  */
#undef	CPP_PREDEFINES
#define CPP_PREDEFINES "-Dm88000 -Dm88k -Dunix -DsysV88 -D__CLASSIFY_TYPE__=2 -Asystem=unix -Asystem=svr3 -Acpu=m88k -Amachine=m88k"

/* Override svr3.h to link with ?crt0.o instead of ?crt1.o and ?crtn.o.
   From arul@sdsu.edu.  */
#undef	STARTFILE_SPEC
#define STARTFILE_SPEC \
   "%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}} crtbegin.o%s"

/* Profiled libraries live in a different directory but keep the same
   names other than that.  arul@sdsu.edu says -lg is always needed.  */
#undef	LIB_SPEC
#define LIB_SPEC "%{p:-L/lib/libp}%{pg:%{!p:-L/lib/libp}} -lg -lc crtend.o%s"

/* We need POSIX/XOPEN symbols; otherwise building libio will fail.  */
#define ADD_MISSING_POSIX 1
#define ADD_MISSING_XOPEN 1

/* Hot version of the profiler that uses r10 to pass the address of
   the counter.  the _gcc_mcount routine knows not to screw with
   the parameter registers.

   DG/UX does this; i wrote a gnu-c/88k specific version and put it
   in libgcc2.c -- RBE; this macro knows about the leading underscore
   convention.  */
#undef	FUNCTION_PROFILER
#define FUNCTION_PROFILER(FILE, LABELNO) \
  output_function_profiler (FILE, LABELNO, "_gcc_mcount", 0)

/* Various other changes that we want to have in place without
   too many changes to the m88k.h file.  */
#undef	USE_LIBG
#define	USE_LIBG

/* Define a few machine-specific details of the implementation of
   constructors.  */

/* Although the .init section is used, it is not automatically invoked.  */
#define INVOKE__main

#define CTOR_LIST_BEGIN	    		\
  asm (INIT_SECTION_ASM_OP);		\
  asm ("\tsubu\t r31,r31,16");	/* (STACK_BOUNDARY / BITS_PER_UNIT) == 16 */ \
  asm ("\tst\t r0,r31,32");	/* REG_PARM_STACK_SPACE (0) == 32 */
#define CTOR_LIST_END

#define TARGET_ASM_CONSTRUCTOR  m88k_svr3_asm_out_constructor
#define TARGET_ASM_DESTRUCTOR  m88k_svr3_asm_out_destructor

#undef	DO_GLOBAL_CTORS_BODY
#define DO_GLOBAL_CTORS_BODY						\
do {									\
  func_ptr *__CTOR_LIST__ = __builtin_alloca (1), *p;			\
  for (p = __CTOR_LIST__ + 4; *p; p += 4)				\
    (*p) ();								\
} while (0)

#define DTOR_LIST_BEGIN							\
  asm (FINI_SECTION_ASM_OP);						\
  func_ptr __DTOR_LIST__[4] = { (func_ptr) (-1), (func_ptr) (-1),	\
				(func_ptr) (-1), (func_ptr) (-1) }
#define DTOR_LIST_END						  	\
  asm (FINI_SECTION_ASM_OP);						\
  func_ptr __DTOR_END__[4] = { (func_ptr) 0, (func_ptr) 0,		\
			       (func_ptr) 0, (func_ptr) 0 }  

/* Walk the list looking for the terminating zero and ignoring all values of
   -1.  */
#undef	DO_GLOBAL_DTORS_BODY
#define DO_GLOBAL_DTORS_BODY			\
  do {						\
    int i;					\
    for (i = 0; __DTOR_LIST__[i] != 0; i++)	\
      if (((int *)__DTOR_LIST__)[i] != -1)	\
	__DTOR_LIST__[i] ();			\
  } while (0)					

#undef INITIALIZE_TRAMPOLINE 
#define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT)			\
{									\
  emit_move_insn (gen_rtx_MEM (SImode, plus_constant (TRAMP, 40)), FNADDR); \
  emit_move_insn (gen_rtx_MEM (SImode, plus_constant (TRAMP, 36)), CXT); \
  emit_call_insn (gen_call						\
		  (gen_rtx_MEM						\
		   (SImode,						\
		    gen_rtx_SYMBOL_REF (Pmode, "__enable_execute_stack")), \
		   const0_rtx));					\
}