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 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  49    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  50    provides part of the support for getting C++ file-scope static
  51    object constructed before entering `main'. */
  52
  53 #undef  STARTFILE_SPEC
  54 #define STARTFILE_SPEC \
  55   "%{!shared: \
  56      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
  57    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  58
  59 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  60    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  61    provides part of the support for getting C++ file-scope static
  62    object constructed before entering `main', followed by a normal
  63    GNU/Linux "finalizer" file, `crtn.o'.  */
  64
  65 #undef  ENDFILE_SPEC
  66 #define ENDFILE_SPEC \
  67   "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
  68
  69 /* This is for -profile to use -lc_p instead of -lc. */
  70 #undef  CC1_SPEC
  71 #define CC1_SPEC "%{profile:-p} \
  72 %{sun4:} %{target:} \
  73 %{mcypress:-mcpu=cypress} \
  74 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
  75 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
  76 "
  77
  78 #undef TARGET_VERSION
  79 #define TARGET_VERSION fprintf (stderr, " (sparc GNU/Linux with ELF)");
  80
  81 #undef SUBTARGET_SWITCHES
  82 #define SUBTARGET_SWITCHES \
  83 {"long-double-64", -MASK_LONG_DOUBLE_128, N_("Use 64 bit long doubles") }, \
  84 {"long-double-128", MASK_LONG_DOUBLE_128, N_("Use 128 bit long doubles") },
  85
  86 #undef SIZE_TYPE
  87 #define SIZE_TYPE "unsigned int"
  88
  89 #undef PTRDIFF_TYPE
  90 #define PTRDIFF_TYPE "int"
  91
  92 #undef WCHAR_TYPE
  93 #define WCHAR_TYPE "int"
  94
  95 #undef WCHAR_TYPE_SIZE
  96 #define WCHAR_TYPE_SIZE 32
  97
  98 #undef MAX_WCHAR_TYPE_SIZE
  99
 100 #undef CPP_PREDEFINES
 101 #define CPP_PREDEFINES "-D__ELF__ -Dunix -D__sparc__ -Dlinux -Asystem=unix -Asystem=posix"
 102
 103 #undef CPP_SUBTARGET_SPEC
 104 #ifdef USE_GNULIBC_1
 105 #define CPP_SUBTARGET_SPEC \
 106 "%{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__} %{posix:-D_POSIX_SOURCE} \
 107 %{mlong-double-128:-D__LONG_DOUBLE_128__}"
 108 #else
 109 #define CPP_SUBTARGET_SPEC \
 110 "%{fPIC:-D__PIC__ -D__pic__} %{fpic:-D__PIC__ -D__pic__} %{posix:-D_POSIX_SOURCE} \
 111 %{pthread:-D_REENTRANT} %{mlong-double-128:-D__LONG_DOUBLE_128__}"
 112 #endif
 113
 114 #undef LIB_SPEC
 115 /* We no longer link with libc_p.a or libg.a by default. If you
 116    want to profile or debug the GNU/Linux C library, please add
 117    -lc_p or -ggdb to LDFLAGS at the link time, respectively.  */
 118 #if 1
 119 #ifdef USE_GNULIBC_1
 120 #define LIB_SPEC \
 121   "%{!shared: %{p:-lgmon} %{pg:-lgmon} %{profile:-lgmon -lc_p} \
 122      %{!profile:%{!ggdb:-lc} %{ggdb:-lg}}}"
 123 #else
 124 #define LIB_SPEC \
 125   "%{shared: -lc} \
 126    %{!shared: %{mieee-fp:-lieee} %{pthread:-lpthread} \
 127      %{profile:-lc_p} %{!profile: -lc}}"
 128 #endif
 129 #else
 130 #define LIB_SPEC \
 131   "%{!shared: \
 132      %{mieee-fp:-lieee} %{p:-lgmon -lc_p} %{pg:-lgmon -lc_p} \
 133        %{!p:%{!pg:%{!g*:-lc} %{g*:-lg}}}}"
 134 #endif
 135
 136 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
 137    for the special GCC options -static and -shared, which allow us to
 138    link things in one of these three modes by applying the appropriate
 139    combinations of options at link-time. We like to support here for
 140    as many of the other GNU linker options as possible. But I don't
 141    have the time to search for those flags. I am sure how to add
 142    support for -soname shared_object_name. H.J.
 143
 144    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 145    -Wl,-V.
 146
 147    When the -shared link option is used a final link is not being
 148    done.  */
 149
 150 /* If ELF is the default format, we should not use /lib/elf. */
 151
 152 #undef  LINK_SPEC
 153 #ifdef USE_GNULIBC_1
 154 #ifndef LINUX_DEFAULT_ELF
 155 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 156   %{!shared: \
 157     %{!ibcs: \
 158       %{!static: \
 159         %{rdynamic:-export-dynamic} \
 160         %{!dynamic-linker:-dynamic-linker /lib/elf/ld-linux.so.1} \
 161         %{!rpath:-rpath /lib/elf/}} %{static:-static}}}"
 162 #else
 163 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 164   %{!shared: \
 165     %{!ibcs: \
 166       %{!static: \
 167         %{rdynamic:-export-dynamic} \
 168         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.1}} \
 169         %{static:-static}}}"
 170 #endif
 171 #else
 172 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 173   %{!mno-relax:%{!r:-relax}} \
 174   %{!shared: \
 175     %{!ibcs: \
 176       %{!static: \
 177         %{rdynamic:-export-dynamic} \
 178         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
 179         %{static:-static}}}"
 180 #endif
 181
 182 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 183    It's safe to pass -s always, even if -g is not used. */
 184 #undef ASM_SPEC
 185 #define ASM_SPEC \
 186   "%{V} %{v:%{!V:-V}} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s %{fpic:-K PIC} \
 187    %{fPIC:-K PIC} %(asm_relax)"
 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\t"
 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 /* Define for support of TFmode long double and REAL_ARITHMETIC.
 235    Sparc ABI says that long double is 4 words.  */
 236 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 237
 238 /* Constant which presents upper bound of the above value.  */
 239 #define MAX_LONG_DOUBLE_TYPE_SIZE 128
 240
 241 /* Define this to set long double type size to use in libgcc2.c, which can
 242    not depend on target_flags.  */
 243 #ifdef __LONG_DOUBLE_128__
 244 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 245 #else
 246 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 247 #endif
 248 \f
 249 /* Override MACHINE_STATE_{SAVE,RESTORE} because we have special
 250    traps available which can get and set the condition codes
 251    reliably.  */
 252 #undef MACHINE_STATE_SAVE
 253 #define MACHINE_STATE_SAVE(ID)                          \
 254   unsigned long int ms_flags, ms_saveret;               \
 255   asm volatile("ta      0x20\n\t"                       \
 256                "mov     %%g1, %0\n\t"                   \
 257                "mov     %%g2, %1\n\t"                   \
 258                : "=r" (ms_flags), "=r" (ms_saveret));
 259
 260 #undef MACHINE_STATE_RESTORE
 261 #define MACHINE_STATE_RESTORE(ID)                       \
 262   asm volatile("mov     %0, %%g1\n\t"                   \
 263                "mov     %1, %%g2\n\t"                   \
 264                "ta      0x21\n\t"                       \
 265                : /* no outputs */                       \
 266                : "r" (ms_flags), "r" (ms_saveret));