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, 2003, 2004
   3    Free Software Foundation, Inc.
   4    Contributed by Eddie C. Dost (ecd@skynet.be)
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.  */
  22
  23 #define TARGET_OS_CPP_BUILTINS()                \
  24   do                                            \
  25     {                                           \
  26         builtin_define_std ("unix");            \
  27         builtin_define_std ("linux");           \
  28         builtin_define ("__gnu_linux__");       \
  29         builtin_assert ("system=linux");        \
  30         builtin_assert ("system=unix");         \
  31         builtin_assert ("system=posix");        \
  32     }                                           \
  33   while (0)
  34
  35 /* Don't assume anything about the header files.  */
  36 #define NO_IMPLICIT_EXTERN_C
  37
  38 #undef MD_EXEC_PREFIX
  39 #undef MD_STARTFILE_PREFIX
  40
  41 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  42    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  43    provides part of the support for getting C++ file-scope static
  44    object constructed before entering `main'.  */
  45
  46 #undef  STARTFILE_SPEC
  47 #ifdef USE_GNULIBC_1
  48 #define STARTFILE_SPEC \
  49   "%{!shared: \
  50      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
  51    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  52 #elif defined HAVE_LD_PIE
  53 #define STARTFILE_SPEC \
  54   "%{!shared: %{pg|p:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}\
  55    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
  56 #else
  57 #define STARTFILE_SPEC \
  58   "%{!shared: %{pg|p:gcrt1.o%s;:crt1.o%s}}\
  59    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
  60 #endif
  61
  62 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  63    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  64    provides part of the support for getting C++ file-scope static
  65    object constructed before entering `main', followed by a normal
  66    GNU/Linux "finalizer" file, `crtn.o'.  */
  67
  68 #undef  ENDFILE_SPEC
  69 #define ENDFILE_SPEC \
  70   "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
  71    %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
  72
  73 /* This is for -profile to use -lc_p instead of -lc.  */
  74 #undef  CC1_SPEC
  75 #define CC1_SPEC "%{profile:-p} \
  76 %{sun4:} %{target:} \
  77 %{mcypress:-mcpu=cypress} \
  78 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
  79 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
  80 "
  81
  82 /* The GNU C++ standard library requires that these macros be defined.  */
  83 #undef CPLUSPLUS_CPP_SPEC
  84 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  85
  86 #undef TARGET_VERSION
  87 #define TARGET_VERSION fprintf (stderr, " (sparc GNU/Linux with ELF)");
  88
  89 #undef SUBTARGET_SWITCHES
  90 #define SUBTARGET_SWITCHES \
  91 {"long-double-64", -MASK_LONG_DOUBLE_128, N_("Use 64 bit long doubles") }, \
  92 {"long-double-128", MASK_LONG_DOUBLE_128, N_("Use 128 bit long doubles") },
  93
  94 #undef SIZE_TYPE
  95 #define SIZE_TYPE "unsigned int"
  96
  97 #undef PTRDIFF_TYPE
  98 #define PTRDIFF_TYPE "int"
  99
 100 #undef WCHAR_TYPE
 101 #define WCHAR_TYPE "int"
 102
 103 #undef WCHAR_TYPE_SIZE
 104 #define WCHAR_TYPE_SIZE 32
 105
 106 #undef CPP_SUBTARGET_SPEC
 107 #ifdef USE_GNULIBC_1
 108 #define CPP_SUBTARGET_SPEC \
 109 "%{fPIC|fPIE|fpic|fpie:-D__PIC__ -D__pic__} %{posix:-D_POSIX_SOURCE} \
 110 %{mlong-double-128:-D__LONG_DOUBLE_128__}"
 111 #else
 112 #define CPP_SUBTARGET_SPEC \
 113 "%{fPIC|fPIE|fpic|fpie:-D__PIC__ -D__pic__} %{posix:-D_POSIX_SOURCE} \
 114 %{pthread:-D_REENTRANT} %{mlong-double-128:-D__LONG_DOUBLE_128__}"
 115 #endif
 116
 117 #undef LIB_SPEC
 118 /* We no longer link with libc_p.a or libg.a by default. If you
 119    want to profile or debug the GNU/Linux C library, please add
 120    -lc_p or -ggdb to LDFLAGS at the link time, respectively.  */
 121 #if 1
 122 #ifdef USE_GNULIBC_1
 123 #define LIB_SPEC \
 124   "%{!shared: %{p:-lgmon} %{pg:-lgmon} %{profile:-lgmon -lc_p} \
 125      %{!profile:%{!ggdb:-lc} %{ggdb:-lg}}}"
 126 #else
 127 #define LIB_SPEC \
 128   "%{pthread:-lpthread} \
 129    %{shared:-lc} \
 130    %{!shared:%{mieee-fp:-lieee} %{profile:-lc_p}%{!profile:-lc}}"
 131 #endif
 132 #else
 133 #define LIB_SPEC \
 134   "%{!shared: \
 135      %{mieee-fp:-lieee} %{p:-lgmon -lc_p} %{pg:-lgmon -lc_p} \
 136        %{!p:%{!pg:%{!g*:-lc} %{g*:-lg}}}}"
 137 #endif
 138
 139 /* Provide a LINK_SPEC appropriate for GNU/Linux.  Here we provide support
 140    for the special GCC options -static and -shared, which allow us to
 141    link things in one of these three modes by applying the appropriate
 142    combinations of options at link-time. We like to support here for
 143    as many of the other GNU linker options as possible. But I don't
 144    have the time to search for those flags. I am sure how to add
 145    support for -soname shared_object_name. H.J.
 146
 147    I took out %{v:%{!V:-V}}. It is too much :-(. They can use
 148    -Wl,-V.
 149
 150    When the -shared link option is used a final link is not being
 151    done.  */
 152
 153 /* If ELF is the default format, we should not use /lib/elf.  */
 154
 155 #undef  LINK_SPEC
 156 #ifdef USE_GNULIBC_1
 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/ld-linux.so.1}} \
 163         %{static:-static}}}"
 164 #else
 165 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 166   %{!mno-relax:%{!r:-relax}} \
 167   %{!shared: \
 168     %{!ibcs: \
 169       %{!static: \
 170         %{rdynamic:-export-dynamic} \
 171         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
 172         %{static:-static}}}"
 173 #endif
 174
 175 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 176    It's safe to pass -s always, even if -g is not used.  */
 177 #undef ASM_SPEC
 178 #define ASM_SPEC \
 179   "%{V} %{v:%{!V:-V}} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
 180    %{fpic|fPIC|fpie|fPIE:-K PIC} %(asm_cpu) %(asm_relax)"
 181
 182 /* Same as sparc.h */
 183 #undef DBX_REGISTER_NUMBER
 184 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 185
 186 #undef ASM_OUTPUT_ALIGNED_LOCAL
 187 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 188 do {                                                                    \
 189   fputs ("\t.local\t", (FILE));         \
 190   assemble_name ((FILE), (NAME));                                       \
 191   putc ('\n', (FILE));                                                  \
 192   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 193 } while (0)
 194
 195 #undef COMMON_ASM_OP
 196 #define COMMON_ASM_OP "\t.common\t"
 197
 198 #undef  LOCAL_LABEL_PREFIX
 199 #define LOCAL_LABEL_PREFIX  "."
 200
 201 /* This is how to output a reference to an internal numbered label where
 202    PREFIX is the class of label and NUM is the number within the class.  */
 203
 204 #undef  ASM_OUTPUT_INTERNAL_LABELREF
 205 #define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM)   \
 206   fprintf (FILE, ".L%s%d", PREFIX, NUM)
 207
 208 /* This is how to store into the string LABEL
 209    the symbol_ref name of an internal numbered label where
 210    PREFIX is the class of label and NUM is the number within the class.
 211    This is suitable for output with `assemble_name'.  */
 212
 213 #undef  ASM_GENERATE_INTERNAL_LABEL
 214 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 215   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 216
 217 \f
 218 /* Define for support of TFmode long double.
 219    SPARC ABI says that long double is 4 words.  */
 220 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 221
 222 /* Define this to set long double type size to use in libgcc2.c, which can
 223    not depend on target_flags.  */
 224 #ifdef __LONG_DOUBLE_128__
 225 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 226 #else
 227 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 228 #endif
 229
 230 #undef DITF_CONVERSION_LIBFUNCS
 231 #define DITF_CONVERSION_LIBFUNCS 1
 232
 233 #if !defined(USE_GNULIBC_1) && defined(HAVE_LD_EH_FRAME_HDR)
 234 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
 235 #endif
 236 \f
 237 #ifdef HAVE_AS_TLS
 238 #undef TARGET_SUN_TLS
 239 #undef TARGET_GNU_TLS
 240 #define TARGET_SUN_TLS 0
 241 #define TARGET_GNU_TLS 1
 242 #endif
 243 \f
 244 /* Don't be different from other Linux platforms in this regard.  */
 245 #define HANDLE_PRAGMA_PACK_PUSH_POP
 246
 247 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 248 #undef CTORS_SECTION_ASM_OP
 249 #undef DTORS_SECTION_ASM_OP
 250
 251 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
 252
 253 #define TARGET_HAS_F_SETLKW
 254
 255 #undef LINK_GCC_C_SEQUENCE_SPEC
 256 #define LINK_GCC_C_SEQUENCE_SPEC \
 257   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
 258
 259 /* Use --as-needed -lgcc_s for eh support.  */
 260 #ifdef HAVE_LD_AS_NEEDED
 261 #define USE_LD_AS_NEEDED 1
 262 #endif
 263
 264 /* Do code reading to identify a signal frame, and set the frame
 265    state data appropriately.  See unwind-dw2.c for the structs.  */
 266
 267 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)               \
 268   do {                                                                  \
 269     unsigned int *pc_ = (CONTEXT)->ra;                                  \
 270     int new_cfa_, i_, oldstyle_;                                        \
 271     int regs_off_, fpu_save_off_;                                       \
 272     int fpu_save_, this_cfa_;                                           \
 273                                                                         \
 274     if (pc_[1] != 0x91d02010)           /* ta 0x10 */                   \
 275       break;                                                            \
 276     if (pc_[0] == 0x821020d8)           /* mov NR_sigreturn, %g1 */     \
 277       oldstyle_ = 1;                                                    \
 278     else if (pc_[0] == 0x82102065)      /* mov NR_rt_sigreturn, %g1 */  \
 279       oldstyle_ = 0;                                                    \
 280     else                                                                \
 281       break;                                                            \
 282     if (oldstyle_)                                                      \
 283       {                                                                 \
 284         regs_off_ = 96;                                                 \
 285         fpu_save_off_ = regs_off_ + (4 * 4) + (16 * 4);                 \
 286       }                                                                 \
 287     else                                                                \
 288       {                                                                 \
 289         regs_off_ = 96 + 128;                                           \
 290         fpu_save_off_ = regs_off_ + (4 * 4) + (16 * 4) + (2 * 4);       \
 291       }                                                                 \
 292     this_cfa_ = (int) (CONTEXT)->cfa;                                   \
 293     new_cfa_ = *(int *)(((CONTEXT)->cfa) + (regs_off_+(4*4)+(14 * 4))); \
 294     fpu_save_ = *(int *)((this_cfa_) + (fpu_save_off_));                \
 295     (FS)->cfa_how = CFA_REG_OFFSET;                                     \
 296     (FS)->cfa_reg = 14;                                                 \
 297     (FS)->cfa_offset = new_cfa_ - (int) (CONTEXT)->cfa;                 \
 298     for (i_ = 1; i_ < 16; ++i_)                                         \
 299       {                                                                 \
 300         if (i_ == 14)                                                   \
 301           continue;                                                     \
 302         (FS)->regs.reg[i_].how = REG_SAVED_OFFSET;                      \
 303         (FS)->regs.reg[i_].loc.offset =                                 \
 304            this_cfa_ + (regs_off_+(4 * 4)+(i_ * 4)) - new_cfa_;         \
 305       }                                                                 \
 306     for (i_ = 0; i_ < 16; ++i_)                                         \
 307       {                                                                 \
 308         (FS)->regs.reg[i_ + 16].how = REG_SAVED_OFFSET;                 \
 309         (FS)->regs.reg[i_ + 16].loc.offset =                            \
 310           this_cfa_ + (i_ * 4) - new_cfa_;                              \
 311       }                                                                 \
 312     if (fpu_save_)                                                      \
 313       {                                                                 \
 314         for (i_ = 0; i_ < 32; ++i_)                                     \
 315           {                                                             \
 316             (FS)->regs.reg[i_ + 32].how = REG_SAVED_OFFSET;             \
 317             (FS)->regs.reg[i_ + 32].loc.offset =                        \
 318               (fpu_save_ + (i_ * 4)) - new_cfa_;                        \
 319           }                                                             \
 320       }                                                                 \
 321     /* Stick return address into %g0, same trick Alpha uses.  */        \
 322     (FS)->regs.reg[0].how = REG_SAVED_OFFSET;                           \
 323     (FS)->regs.reg[0].loc.offset = this_cfa_+(regs_off_+4)-new_cfa_;    \
 324     (FS)->retaddr_column = 0;                                           \
 325     goto SUCCESS;                                                       \
 326   } while (0)