gcc/config/sparc/linux.h

   1 /* Definitions for SPARC running Linux-based GNU systems with ELF.
   2    Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
   3    Contributed by Eddie C. Dost (ecd@skynet.be)
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC 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 2, or (at your option)
  10 any later version.
  11
  12 GNU CC 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 GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #define LINUX_DEFAULT_ELF
  23
  24 /* Don't assume anything about the header files. */
  25 #define NO_IMPLICIT_EXTERN_C
  26
  27 /* GNU/Linux uses ctype from glibc.a. I am not sure how complete it is.
  28    For now, we play safe. It may change later. */
  29
  30 #if 0
  31 #undef MULTIBYTE_CHARS
  32 #define MULTIBYTE_CHARS 1
  33 #endif
  34
  35 #ifndef USE_GNULIBC_1
  36 #undef DEFAULT_VTABLE_THUNKS
  37 #define DEFAULT_VTABLE_THUNKS 1
  38 #endif
  39
  40 /* Use stabs instead of DWARF debug format.  */
  41 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
  42
  43 #include <sparc/sysv4.h>
  44
  45 #undef MD_EXEC_PREFIX
  46 #undef MD_STARTFILE_PREFIX
  47
  48 /* Output at beginning of assembler file.  */
  49 /* The .file command should always begin the output.  */
  50 #undef ASM_FILE_START
  51 #define ASM_FILE_START(FILE)                                            \
  52   do {                                                                  \
  53         output_file_directive (FILE, main_input_filename);              \
  54         fprintf (FILE, "\t.version\t\"01.01\"\n");                      \
  55   } while (0)
  56
  57 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  58    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  59    provides part of the support for getting C++ file-scope static
  60    object constructed before entering `main'. */
  61
  62 #undef  STARTFILE_SPEC
  63 #define STARTFILE_SPEC \
  64   "%{!shared: \
  65      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
  66    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  67
  68 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  69    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  70    provides part of the support for getting C++ file-scope static
  71    object constructed before entering `main', followed by a normal
  72    GNU/Linux "finalizer" file, `crtn.o'.  */
  73
  74 #undef  ENDFILE_SPEC
  75 #define ENDFILE_SPEC \
  76   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
  77
  78 /* This is for -profile to use -lc_p instead of -lc. */
  79 #undef  CC1_SPEC
  80 #define CC1_SPEC "%{profile:-p} \
  81 %{sun4:} %{target:} \
  82 %{mcypress:-mcpu=cypress} \
  83 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
  84 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
  85 "
  86
  87 #undef TARGET_VERSION
  88 #define TARGET_VERSION fprintf (stderr, " (sparc GNU/Linux with ELF)");
  89
  90 #undef SUBTARGET_SWITCHES
  91 #define SUBTARGET_SWITCHES \
  92 {"long-double-64", -MASK_LONG_DOUBLE_128, N_("Use 64 bit long doubles") }, \
  93 {"long-double-128", MASK_LONG_DOUBLE_128, N_("Use 128 bit long doubles") },
  94
  95 #undef SIZE_TYPE
  96 #define SIZE_TYPE "unsigned int"
  97
  98 #undef PTRDIFF_TYPE
  99 #define PTRDIFF_TYPE "int"
 100
 101 #undef WCHAR_TYPE
 102 #define WCHAR_TYPE "int"
 103
 104 #undef WCHAR_TYPE_SIZE
 105 #define WCHAR_TYPE_SIZE 32
 106
 107 #undef MAX_WCHAR_TYPE_SIZE
 108
 109 #undef CPP_PREDEFINES
 110 #define CPP_PREDEFINES "-D__ELF__ -Dunix -D__sparc__ -Dlinux -Asystem=unix -Asystem=posix"
 111
 112 #undef CPP_SUBTARGET_SPEC
 113 #ifdef USE_GNULIBC_1
 114 #define CPP_SUBTARGET_SPEC \
 115 "%{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__} %{posix:-D_POSIX_SOURCE} \
 116 %{mlong-double-128:-D__LONG_DOUBLE_128__}"
 117 #else
 118 #define CPP_SUBTARGET_SPEC \
 119 "%{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__} %{posix:-D_POSIX_SOURCE} \
 120 %{pthread:-D_REENTRANT} %{mlong-double-128:-D__LONG_DOUBLE_128__}"
 121 #endif
 122
 123 #undef LIB_SPEC
 124 /* We no longer link with libc_p.a or libg.a by default. If you
 125    want to profile or debug the GNU/Linux C library, please add
 126    -lc_p or -ggdb to LDFLAGS at the link time, respectively.  */
 127 #if 1
 128 #ifdef USE_GNULIBC_1
 129 #define LIB_SPEC \
 130   "%{!shared: %{p:-lgmon} %{pg:-lgmon} %{profile:-lgmon -lc_p} \
 131      %{!profile:%{!ggdb:-lc} %{ggdb:-lg}}}"
 132 #else
 133 #define LIB_SPEC \
 134   "%{shared: -lc} \
 135    %{!shared: %{mieee-fp:-lieee} %{pthread:-lpthread} \
 136      %{profile:-lc_p} %{!profile: -lc}}"
 137 #endif
 138 #else
 139 #define LIB_SPEC \
 140   "%{!shared: \
 141      %{mieee-fp:-lieee} %{p:-lgmon -lc_p} %{pg:-lgmon -lc_p} \
 142        %{!p:%{!pg:%{!g*:-lc} %{g*:-lg}}}}"
 143 #endif
 144
 145 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
 146    for the special GCC options -static and -shared, which allow us to
 147    link things in one of these three modes by applying the appropriate
 148    combinations of options at link-time. We like to support here for
 149    as many of the other GNU linker options as possible. But I don't
 150    have the time to search for those flags. I am sure how to add
 151    support for -soname shared_object_name. H.J.
 152
 153    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 154    -Wl,-V.
 155
 156    When the -shared link option is used a final link is not being
 157    done.  */
 158
 159 /* If ELF is the default format, we should not use /lib/elf. */
 160
 161 #undef  LINK_SPEC
 162 #ifdef USE_GNULIBC_1
 163 #ifndef LINUX_DEFAULT_ELF
 164 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 165   %{!shared: \
 166     %{!ibcs: \
 167       %{!static: \
 168         %{rdynamic:-export-dynamic} \
 169         %{!dynamic-linker:-dynamic-linker /lib/elf/ld-linux.so.1} \
 170         %{!rpath:-rpath /lib/elf/}} %{static:-static}}}"
 171 #else
 172 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 173   %{!shared: \
 174     %{!ibcs: \
 175       %{!static: \
 176         %{rdynamic:-export-dynamic} \
 177         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.1}} \
 178         %{static:-static}}}"
 179 #endif
 180 #else
 181 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 182   %{!mno-relax:%{!r:-relax}} \
 183   %{!shared: \
 184     %{!ibcs: \
 185       %{!static: \
 186         %{rdynamic:-export-dynamic} \
 187         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
 188         %{static:-static}}}"
 189 #endif
 190
 191 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 192    It's safe to pass -s always, even if -g is not used. */
 193 #undef ASM_SPEC
 194 #define ASM_SPEC \
 195   "%{V} %{v:%{!V:-V}} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s %{fpic:-K PIC} \
 196    %{fPIC:-K PIC} %(asm_relax)"
 197
 198 /* Same as sparc.h */
 199 #undef DBX_REGISTER_NUMBER
 200 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 201
 202 /* We use stabs-in-elf for debugging, because that is what the native
 203    toolchain uses.  XXX */
 204 #undef PREFERRED_DEBUGGING_TYPE
 205 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 206
 207 #undef ASM_OUTPUT_ALIGNED_LOCAL
 208 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 209 do {                                                                    \
 210   fputs ("\t.local\t", (FILE));         \
 211   assemble_name ((FILE), (NAME));                                       \
 212   putc ('\n', (FILE));                                                  \
 213   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 214 } while (0)
 215
 216 #undef COMMON_ASM_OP
 217 #define COMMON_ASM_OP "\t.common\t"
 218
 219 /* This is how to output a definition of an internal numbered label where
 220    PREFIX is the class of label and NUM is the number within the class.  */
 221
 222 #undef  ASM_OUTPUT_INTERNAL_LABEL
 223 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)      \
 224   fprintf (FILE, ".L%s%d:\n", PREFIX, NUM)
 225
 226 /* This is how to output a reference to an internal numbered label where
 227    PREFIX is the class of label and NUM is the number within the class.  */
 228
 229 #undef  ASM_OUTPUT_INTERNAL_LABELREF
 230 #define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM)   \
 231   fprintf (FILE, ".L%s%d", PREFIX, NUM)
 232
 233 /* This is how to store into the string LABEL
 234    the symbol_ref name of an internal numbered label where
 235    PREFIX is the class of label and NUM is the number within the class.
 236    This is suitable for output with `assemble_name'.  */
 237
 238 #undef  ASM_GENERATE_INTERNAL_LABEL
 239 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 240   sprintf (LABEL, "*.L%s%d", PREFIX, NUM)
 241
 242 \f
 243 /* Define for support of TFmode long double and REAL_ARITHMETIC.
 244    Sparc ABI says that long double is 4 words.  */
 245 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 246
 247 /* Constant which presents upper bound of the above value.  */
 248 #define MAX_LONG_DOUBLE_TYPE_SIZE 128
 249
 250 /* Define this to set long double type size to use in libgcc2.c, which can
 251    not depend on target_flags.  */
 252 #ifdef __LONG_DOUBLE_128__
 253 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 254 #else
 255 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 256 #endif
 257 \f
 258 /* Override MACHINE_STATE_{SAVE,RESTORE} because we have special
 259    traps available which can get and set the condition codes
 260    reliably.  */
 261 #undef MACHINE_STATE_SAVE
 262 #define MACHINE_STATE_SAVE(ID)                          \
 263   unsigned long int ms_flags, ms_saveret;               \
 264   asm volatile("ta      0x20\n\t"                       \
 265                "mov     %%g1, %0\n\t"                   \
 266                "mov     %%g2, %1\n\t"                   \
 267                : "=r" (ms_flags), "=r" (ms_saveret));
 268
 269 #undef MACHINE_STATE_RESTORE
 270 #define MACHINE_STATE_RESTORE(ID)                       \
 271   asm volatile("mov     %0, %%g1\n\t"                   \
 272                "mov     %1, %%g2\n\t"                   \
 273                "ta      0x21\n\t"                       \
 274                : /* no outputs */                       \
 275                : "r" (ms_flags), "r" (ms_saveret));