1  /* Definitions for Intel 386 running FreeBSD with ELF format
       2     Copyright (C) 1996-2023 Free Software Foundation, Inc.
       3     Contributed by Eric Youngdale.
       4     Modified for stabs-in-ELF by H.J. Lu.
       5     Adapted from GNU/Linux version by John Polstra.
       6     Continued development by David O'Brien <obrien@freebsd.org>
       7  
       8  This file is part of GCC.
       9  
      10  GCC is free software; you can redistribute it and/or modify
      11  it under the terms of the GNU General Public License as published by
      12  the Free Software Foundation; either version 3, or (at your option)
      13  any later version.
      14  
      15  GCC is distributed in the hope that it will be useful,
      16  but WITHOUT ANY WARRANTY; without even the implied warranty of
      17  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      18  GNU General Public License for more details.
      19  
      20  You should have received a copy of the GNU General Public License
      21  along with GCC; see the file COPYING3.  If not see
      22  <http://www.gnu.org/licenses/>.  */
      23  
      24  
      25  /* Override the default comment-starter of "/".  */
      26  #undef  ASM_COMMENT_START
      27  #define ASM_COMMENT_START "#"
      28  
      29  #undef  ASM_APP_ON
      30  #define ASM_APP_ON "#APP\n"
      31  
      32  #undef  ASM_APP_OFF
      33  #define ASM_APP_OFF "#NO_APP\n"
      34  
      35  #undef  DEBUGGER_REGNO
      36  #define DEBUGGER_REGNO(n) \
      37    (TARGET_64BIT ? debugger64_register_map[n] : svr4_debugger_register_map[n])
      38  
      39  #undef  NO_PROFILE_COUNTERS
      40  #define NO_PROFILE_COUNTERS	1
      41  
      42  /* Tell final.cc that we don't need a label passed to mcount.  */
      43  
      44  #undef  MCOUNT_NAME
      45  #define MCOUNT_NAME ".mcount"
      46  
      47  /* Make gcc agree with <machine/ansi.h>.  */
      48  
      49  #undef  SIZE_TYPE
      50  #define SIZE_TYPE	(TARGET_64BIT ? "long unsigned int" : "unsigned int")
      51   
      52  #undef  PTRDIFF_TYPE
      53  #define PTRDIFF_TYPE	(TARGET_64BIT ? "long int" : "int")
      54    
      55  #undef  WCHAR_TYPE_SIZE
      56  #define WCHAR_TYPE_SIZE	(TARGET_64BIT ? 32 : BITS_PER_WORD)
      57  
      58  #undef  SUBTARGET_EXTRA_SPECS	/* i386.h bogusly defines it.  */
      59  #define SUBTARGET_EXTRA_SPECS \
      60    { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER }
      61      
      62  /* Use the STARTFILE_SPEC from config/freebsd-spec.h.  */
      63  
      64  #undef  STARTFILE_SPEC
      65  #define STARTFILE_SPEC FBSD_STARTFILE_SPEC
      66  
      67  /* Use the ENDFILE_SPEC from config/freebsd-spec.h.  */
      68  
      69  #undef  ENDFILE_SPEC
      70  #define ENDFILE_SPEC FBSD_ENDFILE_SPEC
      71  
      72  /* Provide a LINK_SPEC appropriate for FreeBSD.  Here we provide support
      73     for the special GCC options -static and -shared, which allow us to
      74     link things in one of these three modes by applying the appropriate
      75     combinations of options at link-time.
      76  
      77     When the -shared link option is used a final link is not being
      78     done.  */
      79  
      80  #undef	LINK_SPEC
      81  #define LINK_SPEC "\
      82    %{p:%nconsider using '-pg' instead of '-p' with gprof(1)} \
      83    %{v:-V} \
      84    %{assert*} %{R*} %{rpath*} %{defsym*} \
      85    %{shared:-Bshareable %{h*} %{soname*}} \
      86      %{!shared: \
      87        %{!static: \
      88          %{rdynamic:-export-dynamic} \
      89          -dynamic-linker %(fbsd_dynamic_linker) } \
      90      %{static:-Bstatic}} \
      91    %{symbolic:-Bsymbolic}"
      92  
      93  /* A C statement to output to the stdio stream FILE an assembler
      94     command to advance the location counter to a multiple of 1<<LOG
      95     bytes if it is within MAX_SKIP bytes.  */
      96  
      97  #define SUBALIGN_LOG 3
      98  
      99  /* Don't default to pcc-struct-return, we want to retain compatibility with
     100     older gcc versions AND pcc-struct-return is nonreentrant.
     101     (even though the SVR4 ABI for the i386 says that records and unions are
     102     returned in memory).  */
     103  
     104  #undef  DEFAULT_PCC_STRUCT_RETURN
     105  #define DEFAULT_PCC_STRUCT_RETURN 0
     106  
     107  /* FreeBSD sets the rounding precision of the FPU to 53 bits.  Let the
     108     compiler get the contents of <float.h> and std::numeric_limits correct.  */
     109  #undef TARGET_96_ROUND_53_LONG_DOUBLE
     110  #define TARGET_96_ROUND_53_LONG_DOUBLE (!TARGET_64BIT)
     111  
     112  /* Static stack checking is supported by means of probes.  */
     113  #define STACK_CHECK_STATIC_BUILTIN 1
     114  
     115  #define SUBTARGET32_DEFAULT_CPU "i586"
     116  
     117  #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
     118  
     119  /* Define the shadow offsets for asan.  */
     120  #undef SUBTARGET_SHADOW_OFFSET
     121  #define SUBTARGET_SHADOW_OFFSET	\
     122    (TARGET_LP64 ? HOST_WIDE_INT_1 << 46 : HOST_WIDE_INT_1 << 30)