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 LINUX_DEFAULT_ELF
  23
  24 #define HANDLE_PRAGMA_PACK_PUSH_POP
  25
  26 /* Don't assume anything about the header files.  */
  27 #define NO_IMPLICIT_EXTERN_C
  28
  29 /* GNU/Linux uses ctype from glibc.a. I am not sure how complete it is.
  30    For now, we play safe. It may change later.  */
  31
  32 #if 0
  33 #undef MULTIBYTE_CHARS
  34 #define MULTIBYTE_CHARS 1
  35 #endif
  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 #else
  52 #define STARTFILE_SPEC \
  53   "%{!shared: \
  54      %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} %{!p:crt1.o%s}}}\
  55    crti.o%s %{static:crtbeginT.o%s}\
  56    %{!static:%{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}}"
  57 #endif
  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   "%{ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
  68    %{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
  69
  70 /* This is for -profile to use -lc_p instead of -lc.  */
  71 #undef  CC1_SPEC
  72 #define CC1_SPEC "%{profile:-p} \
  73 %{sun4:} %{target:} \
  74 %{mcypress:-mcpu=cypress} \
  75 %{msparclite:-mcpu=sparclite} %{mf930:-mcpu=f930} %{mf934:-mcpu=f934} \
  76 %{mv8:-mcpu=v8} %{msupersparc:-mcpu=supersparc} \
  77 "
  78
  79 /* The GNU C++ standard library requires that these macros be defined.  */
  80 #undef CPLUSPLUS_CPP_SPEC
  81 #define CPLUSPLUS_CPP_SPEC "-D_GNU_SOURCE %(cpp)"
  82
  83 #undef TARGET_VERSION
  84 #define TARGET_VERSION fprintf (stderr, " (sparc GNU/Linux with ELF)");
  85
  86 #undef SUBTARGET_SWITCHES
  87 #define SUBTARGET_SWITCHES \
  88 {"long-double-64", -MASK_LONG_DOUBLE_128, N_("Use 64 bit long doubles") }, \
  89 {"long-double-128", MASK_LONG_DOUBLE_128, N_("Use 128 bit long doubles") },
  90
  91 #undef SIZE_TYPE
  92 #define SIZE_TYPE "unsigned int"
  93
  94 #undef PTRDIFF_TYPE
  95 #define PTRDIFF_TYPE "int"
  96
  97 #undef WCHAR_TYPE
  98 #define WCHAR_TYPE "int"
  99
 100 #undef WCHAR_TYPE_SIZE
 101 #define WCHAR_TYPE_SIZE 32
 102
 103 #undef CPP_PREDEFINES
 104 #define CPP_PREDEFINES "-D__ELF__ -Dunix -D__sparc__ -D__gnu_linux__ -Dlinux -Asystem=unix -Asystem=posix"
 105
 106 #undef CPP_SUBTARGET_SPEC
 107 #ifdef USE_GNULIBC_1
 108 #define CPP_SUBTARGET_SPEC \
 109 "%{fPIC:-D__PIC__ -D__pic__} %{fpic:-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:-D__PIC__ -D__pic__} %{fpic:-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   "%{shared: -lc} \
 129    %{!shared: %{mieee-fp:-lieee} %{pthread:-lpthread} \
 130      %{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 #ifndef LINUX_DEFAULT_ELF
 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/elf/ld-linux.so.1} \
 164         %{!rpath:-rpath /lib/elf/}} %{static:-static}}}"
 165 #else
 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/ld-linux.so.1}} \
 172         %{static:-static}}}"
 173 #endif
 174 #else
 175 #define LINK_SPEC "-m elf32_sparc -Y P,/usr/lib %{shared:-shared} \
 176   %{!mno-relax:%{!r:-relax}} \
 177   %{!shared: \
 178     %{!ibcs: \
 179       %{!static: \
 180         %{rdynamic:-export-dynamic} \
 181         %{!dynamic-linker:-dynamic-linker /lib/ld-linux.so.2}} \
 182         %{static:-static}}}"
 183 #endif
 184
 185 /* The sun bundled assembler doesn't accept -Yd, (and neither does gas).
 186    It's safe to pass -s always, even if -g is not used.  */
 187 #undef ASM_SPEC
 188 #define ASM_SPEC \
 189   "%{V} %{v:%{!V:-V}} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Wa,*:%*} -s %{fpic:-K PIC} \
 190    %{fPIC:-K PIC} %(asm_cpu) %(asm_relax)"
 191
 192 /* Same as sparc.h */
 193 #undef DBX_REGISTER_NUMBER
 194 #define DBX_REGISTER_NUMBER(REGNO) (REGNO)
 195
 196 #undef ASM_OUTPUT_ALIGNED_LOCAL
 197 #define ASM_OUTPUT_ALIGNED_LOCAL(FILE, NAME, SIZE, ALIGN)               \
 198 do {                                                                    \
 199   fputs ("\t.local\t", (FILE));         \
 200   assemble_name ((FILE), (NAME));                                       \
 201   putc ('\n', (FILE));                                                  \
 202   ASM_OUTPUT_ALIGNED_COMMON (FILE, NAME, SIZE, ALIGN);                  \
 203 } while (0)
 204
 205 #undef COMMON_ASM_OP
 206 #define COMMON_ASM_OP "\t.common\t"
 207
 208 #undef  LOCAL_LABEL_PREFIX
 209 #define LOCAL_LABEL_PREFIX  "."
 210
 211 /* This is how to output a definition of an internal numbered label where
 212    PREFIX is the class of label and NUM is the number within the class.  */
 213
 214 #undef  ASM_OUTPUT_INTERNAL_LABEL
 215 #define ASM_OUTPUT_INTERNAL_LABEL(FILE,PREFIX,NUM)      \
 216   fprintf (FILE, ".L%s%d:\n", PREFIX, NUM)
 217
 218 /* This is how to output a reference to an internal numbered label where
 219    PREFIX is the class of label and NUM is the number within the class.  */
 220
 221 #undef  ASM_OUTPUT_INTERNAL_LABELREF
 222 #define ASM_OUTPUT_INTERNAL_LABELREF(FILE,PREFIX,NUM)   \
 223   fprintf (FILE, ".L%s%d", PREFIX, NUM)
 224
 225 /* This is how to store into the string LABEL
 226    the symbol_ref name of an internal numbered label where
 227    PREFIX is the class of label and NUM is the number within the class.
 228    This is suitable for output with `assemble_name'.  */
 229
 230 #undef  ASM_GENERATE_INTERNAL_LABEL
 231 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM)   \
 232   sprintf (LABEL, "*.L%s%ld", PREFIX, (long)(NUM))
 233
 234 \f
 235 /* Define for support of TFmode long double.
 236    Sparc ABI says that long double is 4 words.  */
 237 #define LONG_DOUBLE_TYPE_SIZE (TARGET_LONG_DOUBLE_128 ? 128 : 64)
 238
 239 /* Constant which presents upper bound of the above value.  */
 240 #define MAX_LONG_DOUBLE_TYPE_SIZE 128
 241
 242 /* Define this to set long double type size to use in libgcc2.c, which can
 243    not depend on target_flags.  */
 244 #ifdef __LONG_DOUBLE_128__
 245 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 128
 246 #else
 247 #define LIBGCC2_LONG_DOUBLE_TYPE_SIZE 64
 248 #endif
 249
 250 #if !defined(USE_GNULIBC_1) && defined(HAVE_LD_EH_FRAME_HDR)
 251 #define LINK_EH_SPEC "%{!static:--eh-frame-hdr} "
 252 #endif
 253 \f
 254 /* Don't be different from other Linux platforms in this regard.  */
 255 #define HANDLE_PRAGMA_PACK_PUSH_POP
 256
 257 /* We use GNU ld so undefine this so that attribute((init_priority)) works.  */
 258 #undef CTORS_SECTION_ASM_OP
 259 #undef DTORS_SECTION_ASM_OP
 260
 261 /* Do code reading to identify a signal frame, and set the frame
 262    state data appropriately.  See unwind-dw2.c for the structs.  */
 263
 264 #define MD_FALLBACK_FRAME_STATE_FOR(CONTEXT, FS, SUCCESS)               \
 265   do {                                                                  \
 266     unsigned int *pc_ = (CONTEXT)->ra;                                  \
 267     int new_cfa_, i_, oldstyle_;                                        \
 268     int regs_off_, fpu_save_off_;                                       \
 269     int fpu_save_, this_cfa_;                                           \
 270                                                                         \
 271     if (pc_[1] != 0x91d02010)           /* ta 0x10 */                   \
 272       break;                                                            \
 273     if (pc_[0] == 0x821020d8)           /* mov NR_sigreturn, %g1 */     \
 274       oldstyle_ = 1;                                                    \
 275     else if (pc_[0] == 0x82102065)      /* mov NR_rt_sigreturn, %g1 */  \
 276       oldstyle_ = 0;                                                    \
 277     else                                                                \
 278       break;                                                            \
 279     if (oldstyle_)                                                      \
 280       {                                                                 \
 281         regs_off_ = 96;                                                 \
 282         fpu_save_off_ = regs_off_ + (4 * 4) + (16 * 4);                 \
 283       }                                                                 \
 284     else                                                                \
 285       {                                                                 \
 286         regs_off_ = 96 + 128;                                           \
 287         fpu_save_off_ = regs_off_ + (4 * 4) + (16 * 4) + (2 * 4);       \
 288       }                                                                 \
 289     this_cfa_ = (int) (CONTEXT)->cfa;                                   \
 290     new_cfa_ = *(int *)(((CONTEXT)->cfa) + (regs_off_+(4*4)+(14 * 4))); \
 291     fpu_save_ = *(int *)((this_cfa_) + (fpu_save_off_));                \
 292     (FS)->cfa_how = CFA_REG_OFFSET;                                     \
 293     (FS)->cfa_reg = 14;                                                 \
 294     (FS)->cfa_offset = new_cfa_ - (int) (CONTEXT)->cfa;                 \
 295     for (i_ = 1; i_ < 16; ++i_)                                         \
 296       {                                                                 \
 297         if (i_ == 14)                                                   \
 298           continue;                                                     \
 299         (FS)->regs.reg[i_].how = REG_SAVED_OFFSET;                      \
 300         (FS)->regs.reg[i_].loc.offset =                                 \
 301            this_cfa_ + (regs_off_+(4 * 4)+(i_ * 4)) - new_cfa_;         \
 302       }                                                                 \
 303     for (i_ = 0; i_ < 16; ++i_)                                         \
 304       {                                                                 \
 305         (FS)->regs.reg[i_ + 16].how = REG_SAVED_OFFSET;                 \
 306         (FS)->regs.reg[i_ + 16].loc.offset =                            \
 307           this_cfa_ + (i_ * 4) - new_cfa_;                              \
 308       }                                                                 \
 309     if (fpu_save_)                                                      \
 310       {                                                                 \
 311         for (i_ = 0; i_ < 32; ++i_)                                     \
 312           {                                                             \
 313             (FS)->regs.reg[i_ + 32].how = REG_SAVED_OFFSET;             \
 314             (FS)->regs.reg[i_ + 32].loc.offset =                        \
 315               (fpu_save_ + (i_ * 4)) - new_cfa_;                        \
 316           }                                                             \
 317       }                                                                 \
 318     /* Stick return address into %g0, same trick Alpha uses.  */        \
 319     (FS)->regs.reg[0].how = REG_SAVED_OFFSET;                           \
 320     (FS)->regs.reg[0].loc.offset = this_cfa_+(regs_off_+4)-new_cfa_;    \
 321     (FS)->retaddr_column = 0;                                           \
 322     goto SUCCESS;                                                       \
 323   } while (0)