xref: /netbsd/external/gpl3/gcc/dist/gcc/config/i386/netbsd-elf.h (revision 9b6d9335)

/* Definitions of target machine for GCC,
   for i386/ELF NetBSD systems.
   Copyright (C) 2001-2020 Free Software Foundation, Inc.
   Contributed by matthew green <mrg@eterna.com.au>

This file is part of GCC.

GCC 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 3, or (at your option)
any later version.

GCC 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 GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */

#define TARGET_OS_CPP_BUILTINS()		\
  do						\
    {						\
      NETBSD_OS_CPP_BUILTINS_ELF();		\
    }						\
  while (0)


/* Provide a LINK_SPEC appropriate for a NetBSD/i386 ELF target.  */

#undef LINK_SPEC
#define LINK_SPEC NETBSD_LINK_SPEC_ELF

#define NETBSD_ENTRY_POINT "__start"


/* Provide a CPP_SPEC appropriate for NetBSD.  */

#undef CPP_SPEC
#define CPP_SPEC "%(netbsd_cpp_spec)"


/* Provide C11_SPEC/CC1PLUS_SPEC appropriate for NetBSD/i386.  */
#define NETBSD_CC1_CPU_SPEC " %(cc1_cpu) "

#undef CC1_SPEC
#define CC1_SPEC NETBSD_CC1_AND_CC1PLUS_SPEC NETBSD_CC1_CPU_SPEC

#undef CC1PLUS_SPEC
#define CC1PLUS_SPEC NETBSD_CC1_AND_CC1PLUS_SPEC NETBSD_CC1_CPU_SPEC


/* Make gcc agree with <machine/ansi.h> */

#undef SIZE_TYPE
#define SIZE_TYPE "unsigned int"

#undef PTRDIFF_TYPE
#define PTRDIFF_TYPE "int"

#undef ASM_APP_ON
#define ASM_APP_ON "#APP\n"

#undef ASM_APP_OFF
#define ASM_APP_OFF "#NO_APP\n"

#undef ASM_COMMENT_START
#define ASM_COMMENT_START "#"

#undef DBX_REGISTER_NUMBER
#define DBX_REGISTER_NUMBER(n)  svr4_dbx_register_map[n]


/* Output assembler code to FILE to call the profiler.  */

#undef NO_PROFILE_COUNTERS
#define NO_PROFILE_COUNTERS	1

#undef FUNCTION_PROFILER
#define FUNCTION_PROFILER(FILE, LABELNO)				\
{									\
  if (flag_pic)								\
    fprintf (FILE, "\tcall __mcount@PLT\n");				\
  else									\
    fprintf (FILE, "\tcall __mcount\n");				\
}


#undef HAS_INIT_SECTION

/* This is how we tell the assembler that two symbols have the same value.  */

#define ASM_OUTPUT_DEF(FILE,NAME1,NAME2) \
  do { assemble_name(FILE, NAME1); 	 \
       fputs(" = ", FILE);		 \
       assemble_name(FILE, NAME2);	 \
       fputc('\n', FILE); } while (0)

/* A C statement to output to the stdio stream FILE an assembler
   command to advance the location counter to a multiple of 1<<LOG
   bytes if it is within MAX_SKIP bytes.

   This is used to align code labels according to Intel recommendations.  */

#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN
#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP)			\
  if ((LOG) != 0) {							\
    if ((MAX_SKIP) == 0 || (MAX_SKIP) >= (1 << (LOG)) - 1)		\
      fprintf ((FILE), "\t.p2align %d\n", (LOG));			\
    else								\
      fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP));	\
  }
#endif

/* We always use gas here, so we don't worry about ECOFF assembler
   problems.  */
#undef TARGET_GAS
#define TARGET_GAS	1

/* Default to pcc-struct-return, because this is the ELF abi and
   we don't care about compatibility with older gcc versions.  */
#define DEFAULT_PCC_STRUCT_RETURN 1

#define HAVE_ENABLE_EXECUTE_STACK

#define IX86_MAYBE_NO_LIBGCC_TFMODE

/* Preserve i386 psABI  */
#undef PREFERRED_STACK_BOUNDARY_DEFAULT
#define PREFERRED_STACK_BOUNDARY_DEFAULT MIN_STACK_BOUNDARY

/* NetBSD/x86 on 32-bit places the ASAN shadow map at 0x40000000.  */
#undef X86_32_ASAN_BIT_OFFSET
#define X86_32_ASAN_BIT_OFFSET 30