gcc/config/sparc/linux.h

   1 /* Definitions for SPARC running Linux-based GNU systems with ELF.
   2    Copyright (C) 1996-2023 Free Software Foundation, Inc.
   3    Contributed by Eddie C. Dost (ecd@skynet.be)
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #define TARGET_OS_CPP_BUILTINS()                \
  22   do                                            \
  23     {                                           \
  24       GNU_USER_TARGET_OS_CPP_BUILTINS();        \
  25       if (TARGET_LONG_DOUBLE_128)               \
  26         builtin_define ("__LONG_DOUBLE_128__"); \
  27     }                                           \
  28   while (0)
  29
  30 #undef  ENDFILE_SPEC
  31 #define ENDFILE_SPEC \
  32   GNU_USER_TARGET_ENDFILE_SPEC \
  33   "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s}"
  34
  35 /* -mcpu=native handling only makes sense with compiler running on
  36    a SPARC chip.  */
  37 #if defined(__sparc__) && defined(__linux__)
  38 extern const char *host_detect_local_cpu (int argc, const char **argv);
  39 # define EXTRA_SPEC_FUNCTIONS                                           \
  40   { "local_cpu_detect", host_detect_local_cpu },
  41
  42 # define MCPU_MTUNE_NATIVE_SPECS                                        \
  43    " %{mcpu=native:%<mcpu=native %:local_cpu_detect(cpu)}"              \
  44    " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
  45 #else
  46 # define MCPU_MTUNE_NATIVE_SPECS ""
  47 #endif
  48
  49 #define DRIVER_SELF_SPECS MCPU_MTUNE_NATIVE_SPECS
  50
  51 #undef  ASAN_CC1_SPEC
  52 #define ASAN_CC1_SPEC "%{%:sanitize(address):-funwind-tables}"
  53
  54 #undef  CC1_SPEC
  55 #define CC1_SPEC GNU_USER_TARGET_CC1_SPEC ASAN_CC1_SPEC
  56
  57 #undef SIZE_TYPE
  58 #define SIZE_TYPE "unsigned int"
  59
  60 #undef PTRDIFF_TYPE
  61 #define PTRDIFF_TYPE "int"
  62
  63 #undef WCHAR_TYPE
  64 #define WCHAR_TYPE "int"
  65
  66 #undef WCHAR_TYPE_SIZE
  67 #define WCHAR_TYPE_SIZE 32
  68
  69 #undef CPP_SUBTARGET_SPEC
  70 #define CPP_SUBTARGET_SPEC \
  71 "%{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
  72
  73 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
  74    for the special GCC options -static and -shared, which allow us to
  75    link things in one of these three modes by applying the appropriate
  76    combinations of options at link-time.
  77
  78    When the -shared link option is used a final link is not being
  79    done.  */
  80
  81 #define GLIBC_DYNAMIC_LINKER "/lib/ld-linux.so.2"
  82
  83 #undef  LINK_SPEC
  84 #define LINK_SPEC "-m elf32_sparc %{shared:-shared} \
  85   %{!mno-relax:%{!r:-relax}} \
  86   %{!shared: \
  87     %{!static: \
  88       %{rdynamic:-export-dynamic} \
  89       -dynamic-linker " GNU_USER_DYNAMIC_LINKER "} \
  90       %{static:-static}}"
  91
  92 /* It's safe to pass -s always, even if -g is not used.  */
  93 #undef ASM_SPEC
  94 #define ASM_SPEC "\
  95 -s \
  96 %{" FPIE_OR_FPIC_SPEC ":-K PIC} \
  97 %{!.c:%{findirect-dispatch:-K PIC}} \
  98 %(asm_cpu) %(asm_relax)"
  99
 100 #undef ASM_OUTPUT_ALIGNED_LOCAL
 101 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 102 do {                                                                    \
 103   fputs ("\t.local\t", (FILE));         \
 104   assemble_name ((FILE), (NAME));                                       \
 105   putc ('\n', (FILE));                                                  \
 106   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 107 } while (0)
 108
 109 #undef COMMON_ASM_OP
 110 #define COMMON_ASM_OP "\t.common\t"
 111
 112 #undef  LOCAL_LABEL_PREFIX
 113 #define LOCAL_LABEL_PREFIX  "."
 114
 115 \f
 116 /* Define for support of TFmode long double.
 117    SPARC ABI says that long double is 4 words.  */
 118 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 119
 120 #undef DITF_CONVERSION_LIBFUNCS
 121 #define DITF_CONVERSION_LIBFUNCS 1
 122 \f
 123 #ifdef HAVE_AS_TLS
 124 #undef TARGET_SUN_TLS
 125 #undef TARGET_GNU_TLS
 126 #define TARGET_SUN_TLS 0
 127 #define TARGET_GNU_TLS 1
 128 #endif
 129 \f
 130 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 131 #undef CTORS_SECTION_ASM_OP
 132 #undef DTORS_SECTION_ASM_OP
 133
 134 /* Static stack checking is supported by means of probes.  */
 135 #define STACK_CHECK_STATIC_BUILTIN 1
 136
 137 #undef NEED_INDICATE_EXEC_STACK
 138 #define NEED_INDICATE_EXEC_STACK 1
 139
 140 #ifdef TARGET_LIBC_PROVIDES_SSP
 141 /* sparc glibc provides __stack_chk_guard in [%g7 + 0x14].  */
 142 #define TARGET_THREAD_SSP_OFFSET        0x14
 143 #endif
 144
 145 /* Define if long doubles should be mangled as 'g'.  */
 146 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
 147
 148 /* We use glibc _mcount for profiling.  */
 149 #undef NO_PROFILE_COUNTERS
 150 #define NO_PROFILE_COUNTERS     1