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
   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=unix");         \
  30         builtin_assert ("system=posix");        \
  31     }                                           \
  32   while (0)
  33
  34 /* Don't assume anything about the header files.  */
  35 #define NO_IMPLICIT_EXTERN_C
  36
  37 #undef MD_EXEC_PREFIX
  38 #undef MD_STARTFILE_PREFIX
  39
  40 /* Provide a STARTFILE_SPEC appropriate for GNU/Linux.  Here we add
  41    the GNU/Linux magical crtbegin.o file (see crtstuff.c) which
  42    provides part of the support for getting C++ file-scope static
  43    object constructed before entering `main'.  */
  44
  45 #undef  STARTFILE_SPEC
  46 #ifdef USE_GNULIBC_1
  47 #define STARTFILE_SPEC \
  48   "%{!shared: \
  49      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
  50    crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
  51 #elif defined HAVE_LD_PIE
  52 #define STARTFILE_SPEC \
  53   "%{!shared: %{pg|p:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s}}\
  54    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
  55 #else
  56 #define STARTFILE_SPEC \
  57   "%{!shared: %{pg|p:gcrt1.o%s;:crt1.o%s}}\
  58    crti.o%s %{static:crtbeginT.o%s;shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
  59 #endif
  60
  61 /* Provide a ENDFILE_SPEC appropriate for GNU/Linux.  Here we tack on
  62    the GNU/Linux magical crtend.o file (see crtstuff.c) which
  63    provides part of the support for getting C++ file-scope static
  64    object constructed before entering `main', followed by a normal
  65    GNU/Linux "finalizer" file, `crtn.o'.  */
  66
  67 #undef  ENDFILE_SPEC
  68 #define ENDFILE_SPEC \
  69   "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
  70    %{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
  71
  72 /* This is for -profile to use -lc_p instead of -lc.  */
  73 #undef  CC1_SPEC
  74 #define CC1_SPEC "%{profile:-p} \
  75 %{sun4:} %{target:} \
  76 %{mcypress:-mcpu=cypress} \
  77 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
  78 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
  79 "
  80
  81 /* The GNU C++ standard library requires that these macros be defined.  */
  82 #undef CPLUSPLUS_CPP_SPEC
  83 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  84
  85 #undef TARGET_VERSION
  86 #define TARGET_VERSION fprintf (stderr, " (sparc GNU/Linux with ELF)");
  87
  88 #undef SUBTARGET_SWITCHES
  89 #define SUBTARGET_SWITCHES \
  90 {"long-double-64", -MASK_LONG_DOUBLE_128, N_("Use 64 bit long doubles") }, \
  91 {"long-double-128", MASK_LONG_DOUBLE_128, N_("Use 128 bit long doubles") },
  92
  93 #undef SIZE_TYPE
  94 #define SIZE_TYPE "unsigned int"
  95
  96 #undef PTRDIFF_TYPE
  97 #define PTRDIFF_TYPE "int"
  98
  99 #undef WCHAR_TYPE
 100 #define WCHAR_TYPE "int"
 101
 102 #undef WCHAR_TYPE_SIZE
 103 #define WCHAR_TYPE_SIZE 32
 104
 105 #undef CPP_SUBTARGET_SPEC
 106 #ifdef USE_GNULIBC_1
 107 #define CPP_SUBTARGET_SPEC \
 108 "%{fPIC|fPIE|fpic|fpie:-D__PIC__ -D__pic__} %{posix:-D_POSIX_SOURCE} \
 109 %{mlong-double-128:-D__LONG_DOUBLE_128__}"
 110 #else
 111 #define CPP_SUBTARGET_SPEC \
 112 "%{fPIC|fPIE|fpic|fpie:-D__PIC__ -D__pic__} %{posix:-D_POSIX_SOURCE} \
 113 %{pthread:-D_REENTRANT} %{mlong-double-128:-D__LONG_DOUBLE_128__}"
 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   "%{pthread:-lpthread} \
 128    %{shared:-lc} \
 129    %{!shared:%{mieee-fp:-lieee} %{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 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 157   %{!shared: \
 158     %{!ibcs: \
 159       %{!static: \
 160         %{rdynamic:-export-dynamic} \
 161         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.1}} \
 162         %{static:-static}}}"
 163 #else
 164 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 165   %{!mno-relax:%{!r:-relax}} \
 166   %{!shared: \
 167     %{!ibcs: \
 168       %{!static: \
 169         %{rdynamic:-export-dynamic} \
 170         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
 171         %{static:-static}}}"
 172 #endif
 173
 174 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 175    It's safe to pass -s always, even if -g is not used.  */
 176 #undef ASM_SPEC
 177 #define ASM_SPEC \
 178   "%{V} %{v:%{!V:-V}} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s \
 179    %{fpic|fPIC|fpie|fPIE:-K PIC} %(asm_cpu) %(asm_relax)"
 180
 181 /* Same as sparc.h */
 182 #undef DBX_REGISTER_NUMBER
 183 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 184
 185 #undef ASM_OUTPUT_ALIGNED_LOCAL
 186 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 187 do {                                                                    \
 188   fputs ("\t.local\t", (FILE));         \
 189   assemble_name ((FILE), (NAME));                                       \
 190   putc ('\n', (FILE));                                                  \
 191   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 192 } while (0)
 193
 194 #undef COMMON_ASM_OP
 195 #define COMMON_ASM_OP "\t.common\t"
 196
 197 #undef  LOCAL_LABEL_PREFIX
 198 #define LOCAL_LABEL_PREFIX  "."
 199
 200 /* This is how to output a reference to an internal numbered label where
 201    PREFIX is the class of label and NUM is the number within the class.  */
 202
 203 #undef  ASM_OUTPUT_INTERNAL_LABELREF
 204 #define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM)   \
 205   fprintf (FILE, ".L%s%d", PREFIX, NUM)
 206
 207 /* This is how to store into the string LABEL
 208    the symbol_ref name of an internal numbered label where
 209    PREFIX is the class of label and NUM is the number within the class.
 210    This is suitable for output with `assemble_name'.  */
 211
 212 #undef  ASM_GENERATE_INTERNAL_LABEL
 213 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 214   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 215
 216 \f
 217 /* Define for support of TFmode long double.
 218    SPARC ABI says that long double is 4 words.  */
 219 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 220
 221 /* Constant which presents upper bound of the above value.  */
 222 #define MAX_LONG_DOUBLE_TYPE_SIZE 128
 223
 224 /* Define this to set long double type size to use in libgcc2.c, which can
 225    not depend on target_flags.  */
 226 #ifdef __LONG_DOUBLE_128__
 227 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 228 #else
 229 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 230 #endif
 231
 232 #if !defined(USE_GNULIBC_1) && defined(HAVE_LD_EH_FRAME_HDR)
 233 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
 234 #endif
 235 \f
 236 #ifdef HAVE_AS_TLS
 237 #undef TARGET_SUN_TLS
 238 #undef TARGET_GNU_TLS
 239 #define TARGET_SUN_TLS 0
 240 #define TARGET_GNU_TLS 1
 241 #endif
 242 \f
 243 /* Don't be different from other Linux platforms in this regard.  */
 244 #define HANDLE_PRAGMA_PACK_PUSH_POP
 245
 246 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 247 #undef CTORS_SECTION_ASM_OP
 248 #undef DTORS_SECTION_ASM_OP
 249
 250 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack
 251
 252 #define LINK_GCC_C_SEQUENCE_SPEC \
 253   "%{static:--start-group} %G %L %{static:--end-group}%{!static:%G}"
 254
 255 /* Do code reading to identify a signal frame, and set the frame
 256    state data appropriately.  See unwind-dw2.c for the structs.  */
 257
 258 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)               \
 259   do {                                                                  \
 260     unsigned int *pc_ = (CONTEXT)->ra;                                  \
 261     int new_cfa_, i_, oldstyle_;                                        \
 262     int regs_off_, fpu_save_off_;                                       \
 263     int fpu_save_, this_cfa_;                                           \
 264                                                                         \
 265     if (pc_[1] != 0x91d02010)           /* ta 0x10 */                   \
 266       break;                                                            \
 267     if (pc_[0] == 0x821020d8)           /* mov NR_sigreturn, %g1 */     \
 268       oldstyle_ = 1;                                                    \
 269     else if (pc_[0] == 0x82102065)      /* mov NR_rt_sigreturn, %g1 */  \
 270       oldstyle_ = 0;                                                    \
 271     else                                                                \
 272       break;                                                            \
 273     if (oldstyle_)                                                      \
 274       {                                                                 \
 275         regs_off_ = 96;                                                 \
 276         fpu_save_off_ = regs_off_ + (4 * 4) + (16 * 4);                 \
 277       }                                                                 \
 278     else                                                                \
 279       {                                                                 \
 280         regs_off_ = 96 + 128;                                           \
 281         fpu_save_off_ = regs_off_ + (4 * 4) + (16 * 4) + (2 * 4);       \
 282       }                                                                 \
 283     this_cfa_ = (int) (CONTEXT)->cfa;                                   \
 284     new_cfa_ = *(int *)(((CONTEXT)->cfa) + (regs_off_+(4*4)+(14 * 4))); \
 285     fpu_save_ = *(int *)((this_cfa_) + (fpu_save_off_));                \
 286     (FS)->cfa_how = CFA_REG_OFFSET;                                     \
 287     (FS)->cfa_reg = 14;                                                 \
 288     (FS)->cfa_offset = new_cfa_ - (int) (CONTEXT)->cfa;                 \
 289     for (i_ = 1; i_ < 16; ++i_)                                         \
 290       {                                                                 \
 291         if (i_ == 14)                                                   \
 292           continue;                                                     \
 293         (FS)->regs.reg[i_].how = REG_SAVED_OFFSET;                      \
 294         (FS)->regs.reg[i_].loc.offset =                                 \
 295            this_cfa_ + (regs_off_+(4 * 4)+(i_ * 4)) - new_cfa_;         \
 296       }                                                                 \
 297     for (i_ = 0; i_ < 16; ++i_)                                         \
 298       {                                                                 \
 299         (FS)->regs.reg[i_ + 16].how = REG_SAVED_OFFSET;                 \
 300         (FS)->regs.reg[i_ + 16].loc.offset =                            \
 301           this_cfa_ + (i_ * 4) - new_cfa_;                              \
 302       }                                                                 \
 303     if (fpu_save_)                                                      \
 304       {                                                                 \
 305         for (i_ = 0; i_ < 32; ++i_)                                     \
 306           {                                                             \
 307             (FS)->regs.reg[i_ + 32].how = REG_SAVED_OFFSET;             \
 308             (FS)->regs.reg[i_ + 32].loc.offset =                        \
 309               (fpu_save_ + (i_ * 4)) - new_cfa_;                        \
 310           }                                                             \
 311       }                                                                 \
 312     /* Stick return address into %g0, same trick Alpha uses.  */        \
 313     (FS)->regs.reg[0].how = REG_SAVED_OFFSET;                           \
 314     (FS)->regs.reg[0].loc.offset = this_cfa_+(regs_off_+4)-new_cfa_;    \
 315     (FS)->retaddr_column = 0;                                           \
 316     goto SUCCESS;                                                       \
 317   } while (0)