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