gcc/config/i386/freebsd.h

   1 /* Definitions for Intel 386 running FreeBSD with ELF format
   2    Copyright (C) 1996-2024 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   " FBSD_LINK_PG_NOTE " \
  84   %{v:-V} \
  85   %{assert*} %{R*} %{rpath*} %{defsym*} \
  86   %{shared:-Bshareable %{h*} %{soname*}} \
  87     %{!shared: \
  88       %{!static: \
  89         %{rdynamic:-export-dynamic} \
  90         -dynamic-linker %(fbsd_dynamic_linker) } \
  91     %{static:-Bstatic}} \
  92   %{symbolic:-Bsymbolic}"
  93
  94 /* A C statement to output to the stdio stream FILE an assembler
  95    command to advance the location counter to a multiple of 1<<LOG
  96    bytes if it is within MAX_SKIP bytes.  */
  97
  98 #define SUBALIGN_LOG 3
  99
 100 /* Don't default to pcc-struct-return, we want to retain compatibility with
 101    older gcc versions AND pcc-struct-return is nonreentrant.
 102    (even though the SVR4 ABI for the i386 says that records and unions are
 103    returned in memory).  */
 104
 105 #undef  DEFAULT_PCC_STRUCT_RETURN
 106 #define DEFAULT_PCC_STRUCT_RETURN 0
 107
 108 /* FreeBSD sets the rounding precision of the FPU to 53 bits.  Let the
 109    compiler get the contents of <float.h> and std::numeric_limits correct.  */
 110 #undef TARGET_96_ROUND_53_LONG_DOUBLE
 111 #define TARGET_96_ROUND_53_LONG_DOUBLE (!TARGET_64BIT)
 112
 113 /* Static stack checking is supported by means of probes.  */
 114 #define STACK_CHECK_STATIC_BUILTIN 1
 115
 116 #define SUBTARGET32_DEFAULT_CPU "i586"
 117
 118 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
 119
 120 /* Define the shadow offsets for asan.  */
 121 #undef SUBTARGET_SHADOW_OFFSET
 122 #define SUBTARGET_SHADOW_OFFSET \
 123   (TARGET_LP64 ? HOST_WIDE_INT_1 << 46 : HOST_WIDE_INT_1 << 30)