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