elf.h

linux下的gcc编译器

/* Target definitions for GNU compiler for VAX using ELF
   Copyright (C) 2002 Free Software Foundation, Inc.
   Contributed by Matt Thomas ([e-mail])

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.  */

#undef REGISTER_PREFIX
#undef REGISTER_NAMES
#define REGISTER_PREFIX "%"
#define REGISTER_NAMES \
{"%r0", "%r1",  "%r2",  "%r3", "%r4", "%r5", "%r6", "%r7", \
 "%r8", "%r9", "%r10", "%r11", "%ap", "%fp", "%sp", "%pc"}
  
#undef SIZE_TYPE
#define SIZE_TYPE "long unsigned int"

#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE "long int"

/* Profiling routine.  */
#undef VAX_FUNCTION_PROFILER_NAME
#define VAX_FUNCTION_PROFILER_NAME "__mcount"

/*  Let's be re-entrant.  */
#undef PCC_STATIC_STRUCT_RETURN

/* Make sure .stabs for a function are always the same section.  */
#define	DBX_OUTPUT_FUNCTION_END(file,decl) function_section(decl)

/* Before the prologue, the top of the frame is below the argument
   count pushed by the CALLS and before the start of the saved registers.  */
#define INCOMING_FRAME_SP_OFFSET 0

/* We use R2-R5 (call-clobbered) registers for exceptions.  */
#define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N) + 2 : INVALID_REGNUM)

/* Place the top of the stack for the DWARF2 EH stackadj value.  */
#define EH_RETURN_STACKADJ_RTX						\
  gen_rtx_MEM (SImode,							\
	       plus_constant (gen_rtx_REG (Pmode, FRAME_POINTER_REGNUM), \
			      -4))

/* Simple store the return handler into the call frame.  */
#define EH_RETURN_HANDLER_RTX						\
  gen_rtx_MEM (Pmode,							\
	       plus_constant (gen_rtx_REG (Pmode, FRAME_POINTER_REGNUM), \
			      16))


/* Reserve the top of the stack for exception handler stackadj value.  */
#undef STARTING_FRAME_OFFSET
#define STARTING_FRAME_OFFSET -4

/* The VAX wants no space between the case instruction and the jump table.  */
#undef  ASM_OUTPUT_BEFORE_CASE_LABEL
#define ASM_OUTPUT_BEFORE_CASE_LABEL(FILE, PREFIX, NUM, TABLE)

/* Get the udiv/urem calls out of the user's namespace.  */
#undef  UDIVSI3_LIBCALL
#define UDIVSI3_LIBCALL "*__udiv"
#undef  UMODSI3_LIBCALL
#define UMODSI3_LIBCALL "*__urem"

#undef OVERRIDE_OPTIONS
#define OVERRIDE_OPTIONS			\
  do						\
    {						\
      /* Do generic VAX overrides.  */		\
      override_options ();			\
						\
      /* Turn off function CSE if we're 	\
	 doing PIC.  */				\
      if (flag_pic) flag_no_function_cse = 1;	\
    }						\
  while (0)

/* VAX ELF is always gas; override the generic VAX ASM_SPEC.  */

#undef ASM_SPEC
#define ASM_SPEC ""