gcc/config/sparc/linux64.h

   1 /* Definitions for 64-bit SPARC running Linux-based GNU systems with ELF.
   2    Copyright (C) 1996-2024 Free Software Foundation, Inc.
   3    Contributed by David S. Miller (davem@caip.rutgers.edu)
   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_ARCH64)                        \
  26         builtin_define ("_LONGLONG");           \
  27       if (TARGET_ARCH32                         \
  28           && TARGET_LONG_DOUBLE_128)            \
  29         builtin_define ("__LONG_DOUBLE_128__"); \
  30     }                                           \
  31   while (0)
  32
  33 /* On Linux, the combination sparc64-* --with-cpu=v8 is supported and
  34    selects a 32-bit compiler.  */
  35 #if defined(TARGET_64BIT_DEFAULT) && TARGET_CPU_DEFAULT >= TARGET_CPU_v9
  36 #undef TARGET_DEFAULT
  37 #define TARGET_DEFAULT \
  38   (MASK_V9 + MASK_64BIT + MASK_PTR64 + MASK_STACK_BIAS + \
  39    MASK_V8PLUS + MASK_APP_REGS + MASK_FPU + MASK_LONG_DOUBLE_128)
  40 #endif
  41
  42 /* This must be v9a not just v9 because by default we enable
  43    -mvis.  */
  44 #undef ASM_CPU64_DEFAULT_SPEC
  45 #define ASM_CPU64_DEFAULT_SPEC "-Av9a"
  46
  47 #undef  ENDFILE_SPEC
  48 #define ENDFILE_SPEC \
  49   GNU_USER_TARGET_ENDFILE_SPEC \
  50   "%{Ofast|ffast-math|funsafe-math-optimizations:%{!shared:crtfastmath.o%s}}"
  51
  52 /* The default code model.  */
  53 #undef SPARC_DEFAULT_CMODEL
  54 #define SPARC_DEFAULT_CMODEL CM_MEDLOW
  55
  56 #undef WCHAR_TYPE
  57 #define WCHAR_TYPE "int"
  58
  59 #undef WCHAR_TYPE_SIZE
  60 #define WCHAR_TYPE_SIZE 32
  61
  62 /* Define for support of TFmode long double.
  63    SPARC ABI says that long double is 4 words.  */
  64 #undef SPARC_LONG_DOUBLE_TYPE_SIZE
  65 #define SPARC_LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
  66
  67 #undef CPP_SUBTARGET_SPEC
  68 #define CPP_SUBTARGET_SPEC "\
  69 %{posix:-D_POSIX_SOURCE} \
  70 %{pthread:-D_REENTRANT} \
  71 "
  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_LINKER32 "/lib/ld-linux.so.2"
  82 #define GLIBC_DYNAMIC_LINKER64 "/lib64/ld-linux.so.2"
  83
  84 #ifdef SPARC_BI_ARCH
  85
  86 #undef SUBTARGET_EXTRA_SPECS
  87 #define SUBTARGET_EXTRA_SPECS \
  88   { "link_arch32",       LINK_ARCH32_SPEC },              \
  89   { "link_arch64",       LINK_ARCH64_SPEC },              \
  90   { "link_arch_default", LINK_ARCH_DEFAULT_SPEC },        \
  91   { "link_arch",         LINK_ARCH_SPEC },
  92
  93 #define LINK_ARCH32_SPEC "-m elf32_sparc %{shared:-shared} \
  94   %{!shared: \
  95     %{!static: \
  96       %{rdynamic:-export-dynamic} \
  97       -dynamic-linker " GNU_USER_DYNAMIC_LINKER32 "} \
  98       %{static:-static}} \
  99 "
 100
 101 #define LINK_ARCH64_SPEC "-m elf64_sparc %{shared:-shared} \
 102   %{!shared: \
 103     %{!static: \
 104       %{rdynamic:-export-dynamic} \
 105       -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \
 106       %{static:-static}} \
 107 "
 108
 109 #define LINK_ARCH_SPEC "\
 110 %{m32:%(link_arch32)} \
 111 %{m64:%(link_arch64)} \
 112 %{!m32:%{!m64:%(link_arch_default)}} \
 113 "
 114
 115 #define LINK_ARCH_DEFAULT_SPEC \
 116 (DEFAULT_ARCH32_P ? LINK_ARCH32_SPEC : LINK_ARCH64_SPEC)
 117
 118 #undef  LINK_SPEC
 119 #define LINK_SPEC "\
 120 %(link_arch) \
 121 %{!mno-relax:%{!r:-relax}} \
 122 "
 123
 124 /* -mcpu=native handling only makes sense with compiler running on
 125    a SPARC chip.  */
 126 #if defined(__sparc__) && defined(__linux__)
 127 extern const char *host_detect_local_cpu (int argc, const char **argv);
 128 # define EXTRA_SPEC_FUNCTIONS                                           \
 129   { "local_cpu_detect", host_detect_local_cpu },
 130
 131 # define MCPU_MTUNE_NATIVE_SPECS                                        \
 132    " %{mcpu=native:%<mcpu=native %:local_cpu_detect(cpu)}"              \
 133    " %{mtune=native:%<mtune=native %:local_cpu_detect(tune)}"
 134 #else
 135 # define MCPU_MTUNE_NATIVE_SPECS ""
 136 #endif
 137
 138 #define DRIVER_SELF_SPECS MCPU_MTUNE_NATIVE_SPECS
 139
 140 /* -fsanitize=address is currently only supported for 32-bit.  */
 141 #define ASAN_REJECT_SPEC \
 142   "%{!%:sanitize(thread):%e-fsanitize=address is not supported in this configuration}"
 143
 144 #undef  ASAN_CC1_SPEC
 145 #if DEFAULT_ARCH32_P
 146 #define ASAN_CC1_SPEC \
 147   "%{%:sanitize(address):-funwind-tables %{m64:" ASAN_REJECT_SPEC "}}"
 148 #else
 149 #define ASAN_CC1_SPEC \
 150   "%{%:sanitize(address):-funwind-tables %{!m32:" ASAN_REJECT_SPEC "}}"
 151 #endif
 152
 153 #undef  CC1_SPEC
 154 #if DEFAULT_ARCH32_P
 155 #define CC1_SPEC GNU_USER_TARGET_CC1_SPEC ASAN_CC1_SPEC \
 156 "%{m32:%{m64:%emay not use both -m32 and -m64}} \
 157 %{m64:-mptr64 -mstack-bias -mlong-double-128 \
 158   %{!mcpu*:-mcpu=ultrasparc} \
 159   %{!mno-vis:%{!mcpu=v9:-mvis}}}"
 160 #else
 161 #define CC1_SPEC GNU_USER_TARGET_CC1_SPEC ASAN_CC1_SPEC \
 162 "%{m32:%{m64:%emay not use both -m32 and -m64}} \
 163 %{m32:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
 164   %{!mcpu*:-mcpu=cypress}} \
 165 %{mv8plus:-mptr32 -mno-stack-bias %{!mlong-double-128:-mlong-double-64} \
 166   %{!mcpu*:-mcpu=v9}} \
 167 %{!m32:%{!mcpu*:-mcpu=ultrasparc}} \
 168 %{!mno-vis:%{!m32:%{!mcpu=v9:-mvis}}}"
 169 #endif
 170
 171 /* Support for a compile-time default CPU, et cetera.  The rules are:
 172    --with-cpu is ignored if -mcpu is specified; likewise --with-cpu-32
 173      and --with-cpu-64.
 174    --with-tune is ignored if -mtune is specified; likewise --with-tune-32
 175      and --with-tune-64.
 176    --with-float is ignored if -mhard-float, -msoft-float, -mfpu, or -mno-fpu
 177      are specified.
 178    In the SPARC_BI_ARCH compiler we cannot pass %{!mcpu=*:-mcpu=%(VALUE)}
 179    here, otherwise say -mcpu=v7 would be passed even when -m64.
 180    CC1_SPEC above takes care of this instead.
 181
 182    Note that the order of the cpu* and tune* options matters: the
 183    config.gcc file always sets with_cpu to some value, even if the
 184    user didn't use --with-cpu when invoking the configure script.
 185    This value is based on the target name.  Therefore we have to make
 186    sure that --with-cpu-32 takes precedence to --with-cpu in < v9
 187    systems, and that --with-cpu-64 takes precedence to --with-cpu in
 188    >= v9 systems.  As for the tune* options, in some platforms
 189    config.gcc also sets a default value for it if the user didn't use
 190    --with-tune when invoking the configure script.  */
 191 #undef OPTION_DEFAULT_SPECS
 192 #if DEFAULT_ARCH32_P
 193 #define OPTION_DEFAULT_SPECS \
 194   {"cpu_32", "%{!m64:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 195   {"cpu_64", "%{m64:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 196   {"cpu", "%{!m64:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 197   {"tune_32", "%{!m64:%{!mtune=*:-mtune=%(VALUE)}}" }, \
 198   {"tune_64", "%{m64:%{!mtune=*:-mtune=%(VALUE)}}" }, \
 199   {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
 200   {"float", "%{!msoft-float:%{!mhard-float:%{!mfpu:%{!mno-fpu:-m%(VALUE)-float}}}}" }
 201 #else
 202 #define OPTION_DEFAULT_SPECS \
 203   {"cpu_32", "%{m32:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 204   {"cpu_64", "%{!m32:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 205   {"cpu", "%{!m32:%{!mcpu=*:-mcpu=%(VALUE)}}" }, \
 206   {"tune_32", "%{m32:%{!mtune=*:-mtune=%(VALUE)}}" },   \
 207   {"tune_64", "%{!m32:%{!mtune=*:-mtune=%(VALUE)}}" },  \
 208   {"tune", "%{!mtune=*:-mtune=%(VALUE)}" }, \
 209   {"float", "%{!msoft-float:%{!mhard-float:%{!mfpu:%{!mno-fpu:-m%(VALUE)-float}}}}" }
 210 #endif
 211
 212 #if DEFAULT_ARCH32_P
 213 #define MULTILIB_DEFAULTS { "m32" }
 214 #else
 215 #define MULTILIB_DEFAULTS { "m64" }
 216 #endif
 217
 218 #else /* !SPARC_BI_ARCH */
 219
 220 #undef LINK_SPEC
 221 #define LINK_SPEC "-m elf64_sparc -Y P,%R/usr/lib64 %{shared:-shared} \
 222   %{!shared: \
 223     %{!static: \
 224       %{rdynamic:-export-dynamic} \
 225       -dynamic-linker " GNU_USER_DYNAMIC_LINKER64 "} \
 226     %{static:-static}} \
 227 %{!mno-relax:%{!r:-relax}} \
 228 "
 229
 230 #endif /* !SPARC_BI_ARCH */
 231
 232 /* It's safe to pass -s always, even if -g is not used.  */
 233 #undef ASM_SPEC
 234 #define ASM_SPEC "\
 235 -s \
 236 %{" FPIE_OR_FPIC_SPEC ":-K PIC} \
 237 %{!.c:%{findirect-dispatch:-K PIC}} \
 238 %(asm_cpu) %(asm_arch) %(asm_relax)"
 239
 240 #undef ASM_OUTPUT_ALIGNED_LOCAL
 241 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 242 do {                                                                    \
 243   fputs ("\t.local\t", (FILE));         \
 244   assemble_name ((FILE), (NAME));                                       \
 245   putc ('\n', (FILE));                                                  \
 246   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 247 } while (0)
 248
 249 #undef COMMON_ASM_OP
 250 #define COMMON_ASM_OP "\t.common\t"
 251
 252 #undef  LOCAL_LABEL_PREFIX
 253 #define LOCAL_LABEL_PREFIX  "."
 254
 255 /* DWARF bits.  */
 256
 257 /* Follow Irix 6 and not the Dwarf2 draft in using 64-bit offsets.
 258    Obviously the Dwarf2 folks haven't tried to actually build systems
 259    with their spec.  On a 64-bit system, only 64-bit relocs become
 260    RELATIVE relocations.  */
 261
 262 /* #define DWARF_OFFSET_SIZE PTR_SIZE */
 263
 264 #undef DITF_CONVERSION_LIBFUNCS
 265 #define DITF_CONVERSION_LIBFUNCS 1
 266 \f
 267 #ifdef HAVE_AS_TLS
 268 #undef TARGET_SUN_TLS
 269 #undef TARGET_GNU_TLS
 270 #define TARGET_SUN_TLS 0
 271 #define TARGET_GNU_TLS 1
 272 #endif
 273 \f
 274 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 275 #undef CTORS_SECTION_ASM_OP
 276 #undef DTORS_SECTION_ASM_OP
 277
 278 /* Static stack checking is supported by means of probes.  */
 279 #define STACK_CHECK_STATIC_BUILTIN 1
 280
 281 #undef NEED_INDICATE_EXEC_STACK
 282 #define NEED_INDICATE_EXEC_STACK 1
 283
 284 #ifdef TARGET_LIBC_PROVIDES_SSP
 285 /* sparc glibc provides __stack_chk_guard in [%g7 + 0x14],
 286    sparc64 glibc provides it at [%g7 + 0x28].  */
 287 #define TARGET_THREAD_SSP_OFFSET        (TARGET_ARCH64 ? 0x28 : 0x14)
 288 #endif
 289
 290 /* Define if long doubles should be mangled as 'g'.  */
 291 #define TARGET_ALTERNATE_LONG_DOUBLE_MANGLING
 292
 293 /* We use glibc _mcount for profiling.  */
 294 #undef NO_PROFILE_COUNTERS
 295 #define NO_PROFILE_COUNTERS     1