gcc/config/sparc/linux.h

   1 /* Definitions for SPARC running Linux-based GNU systems with ELF.
   2    Copyright (C) 1996, 1997, 1998, 1999, 2000, 2002 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 TARGET_OS_CPP_BUILTINS()                \
  23   do                                            \
  24     {                                           \
  25         builtin_define_std ("unix");            \
  26         builtin_define_std ("linux");           \
  27         builtin_define ("__gnu_linux__");       \
  28         builtin_assert ("system=unix");         \
  29         builtin_assert ("system=posix");        \
  30     }                                           \
  31   while (0)
  32
  33 #define LINUX_DEFAULT_ELF
  34
  35 /* Don't assume anything about the header files.  */
  36 #define NO_IMPLICIT_EXTERN_C
  37
  38 /* GNU/Linux uses ctype from glibc.a. I am not sure how complete it is.
  39    For now, we play safe. It may change later.  */
  40
  41 #if 0
  42 #undef MULTIBYTE_CHARS
  43 #define MULTIBYTE_CHARS 1
  44 #endif
  45
  46 #undef MD_EXEC_PREFIX
  47 #undef MD_STARTFILE_PREFIX
  48
  49 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  50    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  51    provides part of the support for getting C++ file-scope static
  52    object constructed before entering `main'.  */
  53
  54 #undef  STARTFILE_SPEC
  55 #ifdef USE_GNULIBC_1
  56 #define STARTFILE_SPEC \
  57   "%{!shared: \
  58      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
  59    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  60 #elif defined HAVE_LD_PIE
  61 #define STARTFILE_SPEC \
  62   "%{!shared: %{pg|p:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}\
  63    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
  64 #else
  65 #define STARTFILE_SPEC \
  66   "%{!shared: %{pg|p:gcrt1.o%s;:crt1.o%s}}\
  67    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
  68 #endif
  69
  70 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  71    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  72    provides part of the support for getting C++ file-scope static
  73    object constructed before entering `main', followed by a normal
  74    GNU/Linux "finalizer" file, `crtn.o'.  */
  75
  76 #undef  ENDFILE_SPEC
  77 #define ENDFILE_SPEC \
  78   "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
  79    %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
  80
  81 /* This is for -profile to use -lc_p instead of -lc.  */
  82 #undef  CC1_SPEC
  83 #define CC1_SPEC "%{profile:-p} \
  84 %{sun4:} %{target:} \
  85 %{mcypress:-mcpu=cypress} \
  86 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
  87 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
  88 "
  89
  90 /* The GNU C++ standard library requires that these macros be defined.  */
  91 #undef CPLUSPLUS_CPP_SPEC
  92 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  93
  94 #undef TARGET_VERSION
  95 #define TARGET_VERSION fprintf (stderr, " (sparc GNU/Linux with ELF)");
  96
  97 #undef SUBTARGET_SWITCHES
  98 #define SUBTARGET_SWITCHES \
  99 {"long-double-64", -MASK_LONG_DOUBLE_128, N_("Use 64 bit long doubles") }, \
 100 {"long-double-128", MASK_LONG_DOUBLE_128, N_("Use 128 bit long doubles") },
 101
 102 #undef SIZE_TYPE
 103 #define SIZE_TYPE "unsigned int"
 104
 105 #undef PTRDIFF_TYPE
 106 #define PTRDIFF_TYPE "int"
 107
 108 #undef WCHAR_TYPE
 109 #define WCHAR_TYPE "int"
 110
 111 #undef WCHAR_TYPE_SIZE
 112 #define WCHAR_TYPE_SIZE 32
 113
 114 #undef CPP_SUBTARGET_SPEC
 115 #ifdef USE_GNULIBC_1
 116 #define CPP_SUBTARGET_SPEC \
 117 "%{fPIC|fPIE|fpic|fpie:-D__PIC__ -D__pic__} %{posix:-D_POSIX_SOURCE} \
 118 %{mlong-double-128:-D__LONG_DOUBLE_128__}"
 119 #else
 120 #define CPP_SUBTARGET_SPEC \
 121 "%{fPIC|fPIE|fpic|fpie:-D__PIC__ -D__pic__} %{posix:-D_POSIX_SOURCE} \
 122 %{pthread:-D_REENTRANT} %{mlong-double-128:-D__LONG_DOUBLE_128__}"
 123 #endif
 124
 125 #undef LIB_SPEC
 126 /* We no longer link with libc_p.a or libg.a by default. If you
 127    want to profile or debug the GNU/Linux C library, please add
 128    -lc_p or -ggdb to LDFLAGS at the link time, respectively.  */
 129 #if 1
 130 #ifdef USE_GNULIBC_1
 131 #define LIB_SPEC \
 132   "%{!shared: %{p:-lgmon} %{pg:-lgmon} %{profile:-lgmon -lc_p} \
 133      %{!profile:%{!ggdb:-lc} %{ggdb:-lg}}}"
 134 #else
 135 #define LIB_SPEC \
 136   "%{pthread:-lpthread} \
 137    %{shared:-lc} \
 138    %{!shared:%{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}"
 139 #endif
 140 #else
 141 #define LIB_SPEC \
 142   "%{!shared: \
 143      %{mieee-fp:-lieee} %{p:-lgmon -lc_p} %{pg:-lgmon -lc_p} \
 144        %{!p:%{!pg:%{!g*:-lc} %{g*:-lg}}}}"
 145 #endif
 146
 147 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
 148    for the special GCC options -static and -shared, which allow us to
 149    link things in one of these three modes by applying the appropriate
 150    combinations of options at link-time. We like to support here for
 151    as many of the other GNU linker options as possible. But I don't
 152    have the time to search for those flags. I am sure how to add
 153    support for -soname shared_object_name. H.J.
 154
 155    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 156    -Wl,-V.
 157
 158    When the -shared link option is used a final link is not being
 159    done.  */
 160
 161 /* If ELF is the default format, we should not use /lib/elf.  */
 162
 163 #undef  LINK_SPEC
 164 #ifdef USE_GNULIBC_1
 165 #ifndef LINUX_DEFAULT_ELF
 166 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 167   %{!shared: \
 168     %{!ibcs: \
 169       %{!static: \
 170         %{rdynamic:-export-dynamic} \
 171         %{!dynamic-linker:-dynamic-linker /lib/elf/ld-linux.so.1} \
 172         %{!rpath:-rpath /lib/elf/}} %{static:-static}}}"
 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.1}} \
 180         %{static:-static}}}"
 181 #endif
 182 #else
 183 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 184   %{!mno-relax:%{!r:-relax}} \
 185   %{!shared: \
 186     %{!ibcs: \
 187       %{!static: \
 188         %{rdynamic:-export-dynamic} \
 189         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
 190         %{static:-static}}}"
 191 #endif
 192
 193 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 194    It's safe to pass -s always, even if -g is not used.  */
 195 #undef ASM_SPEC
 196 #define ASM_SPEC \
 197   "%{V} %{v:%{!V:-V}} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
 198    %{fpic|fPIC|fpie|fPIE:-K PIC} %(asm_cpu) %(asm_relax)"
 199
 200 /* Same as sparc.h */
 201 #undef DBX_REGISTER_NUMBER
 202 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 203
 204 #undef ASM_OUTPUT_ALIGNED_LOCAL
 205 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 206 do {                                                                    \
 207   fputs ("\t.local\t", (FILE));         \
 208   assemble_name ((FILE), (NAME));                                       \
 209   putc ('\n', (FILE));                                                  \
 210   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 211 } while (0)
 212
 213 #undef COMMON_ASM_OP
 214 #define COMMON_ASM_OP "\t.common\t"
 215
 216 #undef  LOCAL_LABEL_PREFIX
 217 #define LOCAL_LABEL_PREFIX  "."
 218
 219 /* This is how to output a reference to 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_LABELREF
 223 #define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM)   \
 224   fprintf (FILE, ".L%s%d", PREFIX, NUM)
 225
 226 /* This is how to store into the string LABEL
 227    the symbol_ref name of an internal numbered label where
 228    PREFIX is the class of label and NUM is the number within the class.
 229    This is suitable for output with `assemble_name'.  */
 230
 231 #undef  ASM_GENERATE_INTERNAL_LABEL
 232 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 233   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 234
 235 \f
 236 /* Define for support of TFmode long double.
 237    SPARC ABI says that long double is 4 words.  */
 238 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 239
 240 /* Constant which presents upper bound of the above value.  */
 241 #define MAX_LONG_DOUBLE_TYPE_SIZE 128
 242
 243 /* Define this to set long double type size to use in libgcc2.c, which can
 244    not depend on target_flags.  */
 245 #ifdef __LONG_DOUBLE_128__
 246 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 247 #else
 248 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 249 #endif
 250
 251 #if !defined(USE_GNULIBC_1) && defined(HAVE_LD_EH_FRAME_HDR)
 252 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
 253 #endif
 254 \f
 255 /* Don't be different from other Linux platforms in this regard.  */
 256 #define HANDLE_PRAGMA_PACK_PUSH_POP
 257
 258 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 259 #undef CTORS_SECTION_ASM_OP
 260 #undef DTORS_SECTION_ASM_OP
 261
 262 #define ASM_FILE_END(FILE) \
 263   do {                                                                  \
 264     named_section_flags (".note.GNU-stack",                             \
 265                          SECTION_DEBUG                                  \
 266                          | (trampolines_created ? SECTION_CODE : 0));   \
 267   } while (0)
 268
 269 /* Do code reading to identify a signal frame, and set the frame
 270    state data appropriately.  See unwind-dw2.c for the structs.  */
 271
 272 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)               \
 273   do {                                                                  \
 274     unsigned int *pc_ = (CONTEXT)->ra;                                  \
 275     int new_cfa_, i_, oldstyle_;                                        \
 276     int regs_off_, fpu_save_off_;                                       \
 277     int fpu_save_, this_cfa_;                                           \
 278                                                                         \
 279     if (pc_[1] != 0x91d02010)           /* ta 0x10 */                   \
 280       break;                                                            \
 281     if (pc_[0] == 0x821020d8)           /* mov NR_sigreturn, %g1 */     \
 282       oldstyle_ = 1;                                                    \
 283     else if (pc_[0] == 0x82102065)      /* mov NR_rt_sigreturn, %g1 */  \
 284       oldstyle_ = 0;                                                    \
 285     else                                                                \
 286       break;                                                            \
 287     if (oldstyle_)                                                      \
 288       {                                                                 \
 289         regs_off_ = 96;                                                 \
 290         fpu_save_off_ = regs_off_ + (4 * 4) + (16 * 4);                 \
 291       }                                                                 \
 292     else                                                                \
 293       {                                                                 \
 294         regs_off_ = 96 + 128;                                           \
 295         fpu_save_off_ = regs_off_ + (4 * 4) + (16 * 4) + (2 * 4);       \
 296       }                                                                 \
 297     this_cfa_ = (int) (CONTEXT)->cfa;                                   \
 298     new_cfa_ = *(int *)(((CONTEXT)->cfa) + (regs_off_+(4*4)+(14 * 4))); \
 299     fpu_save_ = *(int *)((this_cfa_) + (fpu_save_off_));                \
 300     (FS)->cfa_how = CFA_REG_OFFSET;                                     \
 301     (FS)->cfa_reg = 14;                                                 \
 302     (FS)->cfa_offset = new_cfa_ - (int) (CONTEXT)->cfa;                 \
 303     for (i_ = 1; i_ < 16; ++i_)                                         \
 304       {                                                                 \
 305         if (i_ == 14)                                                   \
 306           continue;                                                     \
 307         (FS)->regs.reg[i_].how = REG_SAVED_OFFSET;                      \
 308         (FS)->regs.reg[i_].loc.offset =                                 \
 309            this_cfa_ + (regs_off_+(4 * 4)+(i_ * 4)) - new_cfa_;         \
 310       }                                                                 \
 311     for (i_ = 0; i_ < 16; ++i_)                                         \
 312       {                                                                 \
 313         (FS)->regs.reg[i_ + 16].how = REG_SAVED_OFFSET;                 \
 314         (FS)->regs.reg[i_ + 16].loc.offset =                            \
 315           this_cfa_ + (i_ * 4) - new_cfa_;                              \
 316       }                                                                 \
 317     if (fpu_save_)                                                      \
 318       {                                                                 \
 319         for (i_ = 0; i_ < 32; ++i_)                                     \
 320           {                                                             \
 321             (FS)->regs.reg[i_ + 32].how = REG_SAVED_OFFSET;             \
 322             (FS)->regs.reg[i_ + 32].loc.offset =                        \
 323               (fpu_save_ + (i_ * 4)) - new_cfa_;                        \
 324           }                                                             \
 325       }                                                                 \
 326     /* Stick return address into %g0, same trick Alpha uses.  */        \
 327     (FS)->regs.reg[0].how = REG_SAVED_OFFSET;                           \
 328     (FS)->regs.reg[0].loc.offset = this_cfa_+(regs_off_+4)-new_cfa_;    \
 329     (FS)->retaddr_column = 0;                                           \
 330     goto SUCCESS;                                                       \
 331   } while (0)