gcc/config/sparc/linux.h

   1 /* Definitions for SPARC running Linux-based GNU systems with ELF.
   2    Copyright (C) 1996, 1997, 1998, 1999 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 SIZE_TYPE
  91 #define SIZE_TYPE "unsigned int"
  92
  93 #undef PTRDIFF_TYPE
  94 #define PTRDIFF_TYPE "int"
  95
  96 #undef WCHAR_TYPE
  97 #define WCHAR_TYPE "int"
  98
  99 #undef WCHAR_TYPE_SIZE
 100 #define WCHAR_TYPE_SIZE 32
 101
 102 #undef MAX_WCHAR_TYPE_SIZE
 103
 104 #undef CPP_PREDEFINES
 105 #define CPP_PREDEFINES "-D__ELF__ -Dunix -D__sparc__ -Dlinux -Asystem(unix) -Asystem(posix)"
 106
 107 #undef CPP_SUBTARGET_SPEC
 108 #ifdef USE_GNULIBC_1
 109 #define CPP_SUBTARGET_SPEC \
 110 "%{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__} %{posix:-D_POSIX_SOURCE}"
 111 #else
 112 #define CPP_SUBTARGET_SPEC \
 113 "%{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__} %{posix:-D_POSIX_SOURCE} %{pthread:-D_REENTRANT}"
 114 #endif
 115
 116 #undef LIB_SPEC
 117 /* We no longer link with libc_p.a or libg.a by default. If you
 118    want to profile or debug the GNU/Linux C library, please add
 119    -lc_p or -ggdb to LDFLAGS at the link time, respectively.  */
 120 #if 1
 121 #ifdef USE_GNULIBC_1
 122 #define LIB_SPEC \
 123   "%{!shared: %{p:-lgmon} %{pg:-lgmon} %{profile:-lgmon -lc_p} \
 124      %{!profile:%{!ggdb:-lc} %{ggdb:-lg}}}"
 125 #else
 126 #define LIB_SPEC \
 127   "%{shared: -lc} \
 128    %{!shared: %{mieee-fp:-lieee} %{pthread:-lpthread} \
 129      %{profile:-lc_p} %{!profile: -lc}}"
 130 #endif
 131 #else
 132 #define LIB_SPEC \
 133   "%{!shared: \
 134      %{mieee-fp:-lieee} %{p:-lgmon -lc_p} %{pg:-lgmon -lc_p} \
 135        %{!p:%{!pg:%{!g*:-lc} %{g*:-lg}}}}"
 136 #endif
 137
 138 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
 139    for the special GCC options -static and -shared, which allow us to
 140    link things in one of these three modes by applying the appropriate
 141    combinations of options at link-time. We like to support here for
 142    as many of the other GNU linker options as possible. But I don't
 143    have the time to search for those flags. I am sure how to add
 144    support for -soname shared_object_name. H.J.
 145
 146    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 147    -Wl,-V.
 148
 149    When the -shared link option is used a final link is not being
 150    done.  */
 151
 152 /* If ELF is the default format, we should not use /lib/elf. */
 153
 154 #undef  LINK_SPEC
 155 #ifdef USE_GNULIBC_1
 156 #ifndef LINUX_DEFAULT_ELF
 157 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 158   %{!shared: \
 159     %{!ibcs: \
 160       %{!static: \
 161         %{rdynamic:-export-dynamic} \
 162         %{!dynamic-linker:-dynamic-linker /lib/elf/ld-linux.so.1} \
 163         %{!rpath:-rpath /lib/elf/}} %{static:-static}}}"
 164 #else
 165 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 166   %{!shared: \
 167     %{!ibcs: \
 168       %{!static: \
 169         %{rdynamic:-export-dynamic} \
 170         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.1}} \
 171         %{static:-static}}}"
 172 #endif
 173 #else
 174 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 175   %{!shared: \
 176     %{!ibcs: \
 177       %{!static: \
 178         %{rdynamic:-export-dynamic} \
 179         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
 180         %{static:-static}}}"
 181 #endif
 182
 183 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 184    It's safe to pass -s always, even if -g is not used. */
 185 #undef ASM_SPEC
 186 #define ASM_SPEC \
 187   "%{V} %{v:%{!V:-V}} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s %{fpic:-K PIC} %{fPIC:-K PIC}"
 188
 189 /* Same as sparc.h */
 190 #undef DBX_REGISTER_NUMBER
 191 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 192
 193 /* We use stabs-in-elf for debugging, because that is what the native
 194    toolchain uses.  XXX */
 195 #undef PREFERRED_DEBUGGING_TYPE
 196 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
 197
 198 #undef ASM_OUTPUT_ALIGNED_LOCAL
 199 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 200 do {                                                                    \
 201   fputs ("\t.local\t", (FILE));         \
 202   assemble_name ((FILE), (NAME));                                       \
 203   putc ('\n', (FILE));                                                  \
 204   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 205 } while (0)
 206
 207 #undef COMMON_ASM_OP
 208 #define COMMON_ASM_OP "\t.common"
 209
 210 /* This is how to output a definition of an internal numbered label where
 211    PREFIX is the class of label and NUM is the number within the class.  */
 212
 213 #undef  ASM_OUTPUT_INTERNAL_LABEL
 214 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)      \
 215   fprintf (FILE, ".L%s%d:\n", PREFIX, NUM)
 216
 217 /* This is how to output a reference to an internal numbered label where
 218    PREFIX is the class of label and NUM is the number within the class.  */
 219
 220 #undef  ASM_OUTPUT_INTERNAL_LABELREF
 221 #define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM)   \
 222   fprintf (FILE, ".L%s%d", PREFIX, NUM)
 223
 224 /* This is how to store into the string LABEL
 225    the symbol_ref name of an internal numbered label where
 226    PREFIX is the class of label and NUM is the number within the class.
 227    This is suitable for output with `assemble_name'.  */
 228
 229 #undef  ASM_GENERATE_INTERNAL_LABEL
 230 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 231   sprintf (LABEL, "*.L%s%d", PREFIX, NUM)
 232
 233 \f
 234 #if 0
 235 /* Define for support of TFmode long double and REAL_ARITHMETIC.
 236    Sparc ABI says that long double is 4 words. GNU/Linux does not support
 237    long double yet.  */
 238 #define LONG_DOUBLE_TYPE_SIZE 128
 239 #endif
 240 \f
 241 /* No weird SPARC variants on Linux */
 242 #undef TARGET_LIVE_G0
 243 #define TARGET_LIVE_G0                  0
 244 #undef TARGET_BROKEN_SAVERESTORE
 245 #define TARGET_BROKEN_SAVERESTORE       0
 246 \f
 247 /* Override MACHINE_STATE_{SAVE,RESTORE} because we have special
 248    traps available which can get and set the condition codes
 249    reliably.  */
 250 #undef MACHINE_STATE_SAVE
 251 #define MACHINE_STATE_SAVE(ID)                          \
 252   unsigned long int ms_flags, ms_saveret;               \
 253   asm volatile("ta      0x20\n\t"                       \
 254                "mov     %%g1, %0\n\t"                   \
 255                "mov     %%g2, %1\n\t"                   \
 256                : "=r" (ms_flags), "=r" (ms_saveret));
 257
 258 #undef MACHINE_STATE_RESTORE
 259 #define MACHINE_STATE_RESTORE(ID)                       \
 260   asm volatile("mov     %0, %%g1\n\t"                   \
 261                "mov     %1, %%g2\n\t"                   \
 262                "ta      0x21\n\t"                       \
 263                : /* no outputs */                       \
 264                : "r" (ms_flags), "r" (ms_saveret));