gcc/config/i386/sol2.h

   1 /* Target definitions for GCC for Intel 80386 running Solaris 2
   2    Copyright (C) 1993-2015 Free Software Foundation, Inc.
   3    Contributed by Fred Fish (fnf@cygnus.com).
   4
   5 This file is part of GCC.
   6
   7 GCC 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 3, or (at your option)
  10 any later version.
  11
  12 GCC 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 GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #define SUBTARGET_OPTIMIZATION_OPTIONS                          \
  22   { OPT_LEVELS_1_PLUS, OPT_momit_leaf_frame_pointer, NULL, 1 }
  23
  24 /* Old versions of the Solaris assembler can not handle the difference of
  25    labels in different sections, so force DW_EH_PE_datarel if so.  */
  26 #ifndef HAVE_AS_IX86_DIFF_SECT_DELTA
  27 #undef ASM_PREFERRED_EH_DATA_FORMAT
  28 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)                       \
  29   (flag_pic ? ((GLOBAL ? DW_EH_PE_indirect : 0)                         \
  30                | (TARGET_64BIT ? DW_EH_PE_pcrel | DW_EH_PE_sdata4       \
  31                   : DW_EH_PE_datarel))                                  \
  32    : DW_EH_PE_absptr)
  33 #endif
  34
  35 /* The Solaris linker will not merge a read-only .eh_frame section
  36    with a read-write .eh_frame section.  None of the encodings used
  37    with non-PIC code require runtime relocations.  In 64-bit mode,
  38    since there is no backwards compatibility issue, we use a read-only
  39    section for .eh_frame.  In 32-bit mode, we use a writable .eh_frame
  40    section in order to be compatible with G++ for Solaris x86.  */
  41 #undef EH_TABLES_CAN_BE_READ_ONLY
  42 #define EH_TABLES_CAN_BE_READ_ONLY (TARGET_64BIT)
  43
  44 /* Follow Sun requirements for TLS code sequences and use Sun assembler TLS
  45    syntax.  */
  46 #undef TARGET_SUN_TLS
  47 #define TARGET_SUN_TLS 1
  48
  49 /* Solaris 2/Intel as chokes on #line directives before Solaris 10.  */
  50 #undef CPP_SPEC
  51 #define CPP_SPEC "%{,assembler-with-cpp:-P} %(cpp_subtarget)"
  52
  53 /* GNU as understands --32 and --64, but the native Solaris
  54    assembler requires -xarch=generic or -xarch=generic64 instead.  */
  55 #ifdef USE_GAS
  56 #define ASM_CPU32_DEFAULT_SPEC "--32"
  57 #define ASM_CPU64_DEFAULT_SPEC "--64"
  58 #else
  59 #define ASM_CPU32_DEFAULT_SPEC "-xarch=generic"
  60 #define ASM_CPU64_DEFAULT_SPEC "-xarch=generic64"
  61 #endif
  62
  63 #undef ASM_CPU_SPEC
  64 #define ASM_CPU_SPEC "%(asm_cpu_default)"
  65
  66 /* Don't include ASM_PIC_SPEC.  While the Solaris 10+ assembler accepts -K PIC,
  67    it gives many warnings:
  68         Absolute relocation is used for symbol "<symbol>"
  69    GNU as doesn't recognize -K at all.  */
  70 #undef ASM_SPEC
  71 #define ASM_SPEC ASM_SPEC_BASE
  72
  73 #define DEFAULT_ARCH32_P !TARGET_64BIT_DEFAULT
  74
  75 #define ARCH64_SUBDIR "amd64"
  76
  77 #ifdef USE_GLD
  78 /* Since binutils 2.21, GNU ld supports new *_sol2 emulations to strictly
  79    follow the Solaris 2 ABI.  Prefer them if present.  */
  80 #ifdef HAVE_LD_SOL2_EMULATION
  81 #define ARCH32_EMULATION "elf_i386_sol2"
  82 #define ARCH64_EMULATION "elf_x86_64_sol2"
  83 #else
  84 #define ARCH32_EMULATION "elf_i386"
  85 #define ARCH64_EMULATION "elf_x86_64"
  86 #endif
  87 #endif
  88
  89 #undef  ENDFILE_SPEC
  90 #define ENDFILE_SPEC \
  91   "%{Ofast|ffast-math|funsafe-math-optimizations:crtfastmath.o%s} \
  92    %{mpc32:crtprec32.o%s} \
  93    %{mpc64:crtprec64.o%s} \
  94    %{mpc80:crtprec80.o%s} \
  95    crtend.o%s crtn.o%s"
  96
  97 #define SUBTARGET_CPU_EXTRA_SPECS \
  98   { "cpp_subtarget",     CPP_SUBTARGET_SPEC },          \
  99   { "asm_cpu",           ASM_CPU_SPEC },                \
 100   { "asm_cpu_default",   ASM_CPU_DEFAULT_SPEC },        \
 101
 102 /* Register the Solaris-specific #pragma directives.  */
 103 #define REGISTER_SUBTARGET_PRAGMAS() solaris_register_pragmas ()
 104
 105 #undef LOCAL_LABEL_PREFIX
 106 #define LOCAL_LABEL_PREFIX "."
 107
 108 /* The Solaris 10 FCS as doesn't accept "#" comments, while later versions
 109    do.  */
 110 #undef ASM_COMMENT_START
 111 #define ASM_COMMENT_START "/"
 112
 113 /* The 32-bit Solaris assembler does not support .quad.  Do not use it.  */
 114 #ifndef HAVE_AS_IX86_QUAD
 115 #undef ASM_QUAD
 116 #endif
 117
 118 /* The native Solaris assembler can't calculate the difference between
 119    symbols in different sections, which causes problems for -fPIC jump
 120    tables in .rodata.  */
 121 #ifndef HAVE_AS_IX86_DIFF_SECT_DELTA
 122 #undef JUMP_TABLES_IN_TEXT_SECTION
 123 #define JUMP_TABLES_IN_TEXT_SECTION 1
 124
 125 /* The native Solaris assembler cannot handle the SYMBOL-. syntax, but
 126    requires SYMBOL@rel/@rel64 instead.  */
 127 #define ASM_OUTPUT_DWARF_PCREL(FILE, SIZE, LABEL)       \
 128   do {                                                  \
 129     fputs (integer_asm_op (SIZE, FALSE), FILE);         \
 130     assemble_name (FILE, LABEL);                        \
 131     fputs (SIZE == 8 ? "@rel64" : "@rel", FILE);        \
 132   } while (0)
 133 #endif
 134
 135 /* The Solaris assembler wants a .local for non-exported aliases.  */
 136 #define ASM_OUTPUT_DEF_FROM_DECLS(FILE, DECL, TARGET)   \
 137   do {                                                  \
 138     const char *declname =                              \
 139       IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL));  \
 140     ASM_OUTPUT_DEF ((FILE), declname,                   \
 141                     IDENTIFIER_POINTER (TARGET));       \
 142     if (! TREE_PUBLIC (DECL))                           \
 143       {                                                 \
 144         fprintf ((FILE), "%s", LOCAL_ASM_OP);           \
 145         assemble_name ((FILE), declname);               \
 146         fprintf ((FILE), "\n");                         \
 147       }                                                 \
 148   } while (0)
 149
 150 #ifndef USE_GAS
 151 /* The Sun assembler uses .tcomm for TLS common sections.  */
 152 #define TLS_COMMON_ASM_OP ".tcomm"
 153
 154 /* Similar to the Sun assembler on SPARC, the native assembler requires
 155    TLS objects to be declared as @tls_obj (not @tls_object).  Unlike SPARC,
 156    gas doesn't understand this variant.  */
 157 #undef  ASM_DECLARE_OBJECT_NAME
 158 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)               \
 159   do                                                            \
 160     {                                                           \
 161       HOST_WIDE_INT size;                                       \
 162                                                                 \
 163       if (targetm.have_tls && DECL_THREAD_LOCAL_P (DECL))       \
 164         ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "tls_obj");      \
 165       else                                                      \
 166         ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");       \
 167                                                                 \
 168       size_directive_output = 0;                                \
 169       if (!flag_inhibit_size_directive                          \
 170           && (DECL) && DECL_SIZE (DECL))                        \
 171         {                                                       \
 172           size_directive_output = 1;                            \
 173           size = int_size_in_bytes (TREE_TYPE (DECL));          \
 174           ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size);         \
 175         }                                                       \
 176                                                                 \
 177       ASM_OUTPUT_LABEL (FILE, NAME);                            \
 178     }                                                           \
 179   while (0)
 180 #endif /* !USE_GAS */
 181
 182 /* As in sparc/sol2.h, override the default from i386/x86-64.h to work
 183    around Sun as TLS bug.  */
 184 #undef  ASM_OUTPUT_ALIGNED_COMMON
 185 #define ASM_OUTPUT_ALIGNED_COMMON(FILE, NAME, SIZE, ALIGN)              \
 186   do                                                                    \
 187     {                                                                   \
 188       if (TARGET_SUN_TLS                                                \
 189           && in_section                                                 \
 190           && ((in_section->common.flags & SECTION_TLS) == SECTION_TLS)) \
 191         switch_to_section (bss_section);                                \
 192       x86_elf_aligned_common (FILE, NAME, SIZE, ALIGN);                 \
 193     }                                                                   \
 194   while  (0)
 195
 196 /* Output a simple call for .init/.fini.  */
 197 #define ASM_OUTPUT_CALL(FILE, FN)                               \
 198   do                                                            \
 199     {                                                           \
 200       fprintf (FILE, "\tcall\t");                               \
 201       ix86_print_operand (FILE, XEXP (DECL_RTL (FN), 0), 'P');  \
 202       fprintf (FILE, "\n");                                     \
 203     }                                                           \
 204   while (0)
 205
 206 #undef TARGET_ASM_NAMED_SECTION
 207 #define TARGET_ASM_NAMED_SECTION i386_solaris_elf_named_section
 208
 209 #ifndef USE_GAS
 210 /* Emit COMDAT group signature symbols for Sun as.  */
 211 #undef TARGET_ASM_FILE_END
 212 #define TARGET_ASM_FILE_END solaris_file_end
 213 #endif
 214
 215 /* Unlike GNU ld, Sun ld doesn't coalesce .ctors.N/.dtors.N sections, so
 216    inhibit their creation.  Also cf. sparc/sysv4.h.  */
 217 #ifndef USE_GLD
 218 #define CTORS_SECTION_ASM_OP    "\t.section\t.ctors, \"aw\""
 219 #define DTORS_SECTION_ASM_OP    "\t.section\t.dtors, \"aw\""
 220 #endif
 221
 222 #define USE_IX86_FRAME_POINTER 1
 223 #define USE_X86_64_FRAME_POINTER 1
 224
 225 #undef NO_PROFILE_COUNTERS
 226
 227 #undef MCOUNT_NAME
 228 #define MCOUNT_NAME "_mcount"
 229
 230 /* We do not need NT_VERSION notes.  */
 231 #undef X86_FILE_START_VERSION_DIRECTIVE
 232 #define X86_FILE_START_VERSION_DIRECTIVE false
 233
 234 /* Only recent versions of Solaris 11 ld properly support hidden .gnu.linkonce
 235    sections, so don't use them.  */
 236 #ifndef USE_GLD
 237 #define USE_HIDDEN_LINKONCE 0
 238 #endif