gcc/config/i386/sol2.h

   1 /* Target definitions for GCC for Intel 80386 running Solaris 2
   2    Copyright (C) 1993-2018 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 /* 32-bit Solaris/x86 only guarantees 4-byte stack alignment as required by
  25    the i386 psABI, so realign it as necessary for SSE instructions.  */
  26 #undef STACK_REALIGN_DEFAULT
  27 #define STACK_REALIGN_DEFAULT (TARGET_64BIT ? 0 : 1)
  28
  29 /* Old versions of the Solaris assembler can not handle the difference of
  30    labels in different sections, so force DW_EH_PE_datarel if so.  */
  31 #ifndef HAVE_AS_IX86_DIFF_SECT_DELTA
  32 #undef ASM_PREFERRED_EH_DATA_FORMAT
  33 #define ASM_PREFERRED_EH_DATA_FORMAT(CODE,GLOBAL)                       \
  34   (flag_pic ? ((GLOBAL ? DW_EH_PE_indirect : 0)                         \
  35                | (TARGET_64BIT ? DW_EH_PE_pcrel | DW_EH_PE_sdata4       \
  36                   : DW_EH_PE_datarel))                                  \
  37    : DW_EH_PE_absptr)
  38 #endif
  39
  40 /* The Solaris linker will not merge a read-only .eh_frame section
  41    with a read-write .eh_frame section.  None of the encodings used
  42    with non-PIC code require runtime relocations.  In 64-bit mode,
  43    since there is no backwards compatibility issue, we use a read-only
  44    section for .eh_frame.  In 32-bit mode, we use a writable .eh_frame
  45    section in order to be compatible with G++ for Solaris x86.  */
  46 #undef EH_TABLES_CAN_BE_READ_ONLY
  47 #define EH_TABLES_CAN_BE_READ_ONLY (TARGET_64BIT)
  48
  49 /* Follow Sun requirements for TLS code sequences and use Sun assembler TLS
  50    syntax.  */
  51 #undef TARGET_SUN_TLS
  52 #define TARGET_SUN_TLS 1
  53
  54 /* Solaris 2/Intel as chokes on #line directives before Solaris 10.  */
  55 #undef CPP_SPEC
  56 #define CPP_SPEC "%{,assembler-with-cpp:-P} %(cpp_subtarget)"
  57
  58 /* GNU as understands --32 and --64, but the native Solaris
  59    assembler requires -xarch=generic or -xarch=generic64 instead.  */
  60 #ifdef USE_GAS
  61 #define ASM_CPU32_DEFAULT_SPEC "--32"
  62 #define ASM_CPU64_DEFAULT_SPEC "--64"
  63 #else
  64 #define ASM_CPU32_DEFAULT_SPEC "-xarch=generic"
  65 #define ASM_CPU64_DEFAULT_SPEC "-xarch=generic64"
  66 #endif
  67
  68 /* Since Studio 12.6, as needs -xbrace_comment=no so its AVX512 syntax is
  69    fully compatible with gas.  */
  70 #ifdef HAVE_AS_XBRACE_COMMENT_OPTION
  71 #define ASM_XBRACE_COMMENT_SPEC "-xbrace_comment=no"
  72 #else
  73 #define ASM_XBRACE_COMMENT_SPEC ""
  74 #endif
  75
  76 #undef ASM_CPU_SPEC
  77 #define ASM_CPU_SPEC "%(asm_cpu_default) " ASM_XBRACE_COMMENT_SPEC
  78
  79 /* Don't include ASM_PIC_SPEC.  While the Solaris 10+ assembler accepts -K PIC,
  80    it gives many warnings:
  81         Absolute relocation is used for symbol "<symbol>"
  82    GNU as doesn't recognize -K at all.  */
  83 #undef ASM_SPEC
  84 #define ASM_SPEC ASM_SPEC_BASE
  85
  86 #define DEFAULT_ARCH32_P !TARGET_64BIT_DEFAULT
  87
  88 #define ARCH64_SUBDIR "amd64"
  89
  90 #ifdef USE_GLD
  91 /* Since binutils 2.21, GNU ld supports new *_sol2 emulations to strictly
  92    follow the Solaris 2 ABI.  Prefer them if present.  */
  93 #ifdef HAVE_LD_SOL2_EMULATION
  94 #define ARCH32_EMULATION "elf_i386_sol2"
  95 #define ARCH64_EMULATION "elf_x86_64_sol2"
  96 #else
  97 #define ARCH32_EMULATION "elf_i386"
  98 #define ARCH64_EMULATION "elf_x86_64"
  99 #endif
 100 #endif
 101
 102 #define ENDFILE_ARCH_SPEC \
 103   "%{mpc32:crtprec32.o%s} \
 104    %{mpc64:crtprec64.o%s} \
 105    %{mpc80:crtprec80.o%s}"
 106
 107 #define SUBTARGET_CPU_EXTRA_SPECS \
 108   { "cpp_subtarget",     CPP_SUBTARGET_SPEC },          \
 109   { "asm_cpu",           ASM_CPU_SPEC },                \
 110   { "asm_cpu_default",   ASM_CPU_DEFAULT_SPEC },        \
 111
 112 /* Register the Solaris-specific #pragma directives.  */
 113 #define REGISTER_SUBTARGET_PRAGMAS() solaris_register_pragmas ()
 114
 115 #undef LOCAL_LABEL_PREFIX
 116 #define LOCAL_LABEL_PREFIX "."
 117
 118 /* The Solaris 10 FCS as doesn't accept "#" comments, while later versions
 119    do.  */
 120 #undef ASM_COMMENT_START
 121 #define ASM_COMMENT_START "/"
 122
 123 /* The 32-bit Solaris assembler does not support .quad.  Do not use it.  */
 124 #ifndef HAVE_AS_IX86_QUAD
 125 #undef ASM_QUAD
 126 #endif
 127
 128 /* The native Solaris assembler can't calculate the difference between
 129    symbols in different sections, which causes problems for -fPIC jump
 130    tables in .rodata.  */
 131 #ifndef HAVE_AS_IX86_DIFF_SECT_DELTA
 132 #undef JUMP_TABLES_IN_TEXT_SECTION
 133 #define JUMP_TABLES_IN_TEXT_SECTION 1
 134
 135 /* The native Solaris assembler cannot handle the SYMBOL-. syntax, but
 136    requires SYMBOL@rel/@rel64 instead.  */
 137 #define ASM_OUTPUT_DWARF_PCREL(FILE, SIZE, LABEL)       \
 138   do {                                                  \
 139     fputs (integer_asm_op (SIZE, FALSE), FILE);         \
 140     assemble_name (FILE, LABEL);                        \
 141     fputs (SIZE == 8 ? "@rel64" : "@rel", FILE);        \
 142   } while (0)
 143 #endif
 144
 145 /* The Solaris assembler wants a .local for non-exported aliases.  */
 146 #define ASM_OUTPUT_DEF_FROM_DECLS(FILE, DECL, TARGET)   \
 147   do {                                                  \
 148     tree id = DECL_ASSEMBLER_NAME (DECL);               \
 149     ultimate_transparent_alias_target (&id);            \
 150     const char *declname = IDENTIFIER_POINTER (id);     \
 151     ASM_OUTPUT_DEF ((FILE), declname,                   \
 152                     IDENTIFIER_POINTER (TARGET));       \
 153     if (! TREE_PUBLIC (DECL))                           \
 154       {                                                 \
 155         fprintf ((FILE), "%s", LOCAL_ASM_OP);           \
 156         assemble_name ((FILE), declname);               \
 157         fprintf ((FILE), "\n");                         \
 158       }                                                 \
 159   } while (0)
 160
 161 #ifndef USE_GAS
 162 /* The Sun assembler uses .tcomm for TLS common sections.  */
 163 #define TLS_COMMON_ASM_OP ".tcomm"
 164
 165 /* Similar to the Sun assembler on SPARC, the native assembler requires
 166    TLS objects to be declared as @tls_obj (not @tls_object).  Unlike SPARC,
 167    gas doesn't understand this variant.  */
 168 #undef  ASM_DECLARE_OBJECT_NAME
 169 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)               \
 170   do                                                            \
 171     {                                                           \
 172       HOST_WIDE_INT size;                                       \
 173                                                                 \
 174       if (targetm.have_tls && DECL_THREAD_LOCAL_P (DECL))       \
 175         ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "tls_obj");      \
 176       else                                                      \
 177         ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");       \
 178                                                                 \
 179       size_directive_output = 0;                                \
 180       if (!flag_inhibit_size_directive                          \
 181           && (DECL) && DECL_SIZE (DECL))                        \
 182         {                                                       \
 183           size_directive_output = 1;                            \
 184           size = int_size_in_bytes (TREE_TYPE (DECL));          \
 185           ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size);         \
 186         }                                                       \
 187                                                                 \
 188       ASM_OUTPUT_LABEL (FILE, NAME);                            \
 189     }                                                           \
 190   while (0)
 191 #endif /* !USE_GAS */
 192
 193 /* As in sparc/sol2.h, override the default from i386/x86-64.h to work
 194    around Sun as TLS bug.  */
 195 #undef  ASM_OUTPUT_ALIGNED_DECL_COMMON
 196 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN)   \
 197   do                                                                    \
 198     {                                                                   \
 199       if (TARGET_SUN_TLS                                                \
 200           && in_section                                                 \
 201           && ((in_section->common.flags & SECTION_TLS) == SECTION_TLS)) \
 202         switch_to_section (bss_section);                                \
 203       x86_elf_aligned_decl_common (FILE, DECL, NAME, SIZE, ALIGN);      \
 204     }                                                                   \
 205   while  (0)
 206
 207 /* Output a simple call for .init/.fini.  */
 208 #define ASM_OUTPUT_CALL(FILE, FN)                               \
 209   do                                                            \
 210     {                                                           \
 211       fprintf (FILE, "\tcall\t");                               \
 212       ix86_print_operand (FILE, XEXP (DECL_RTL (FN), 0), 'P');  \
 213       fprintf (FILE, "\n");                                     \
 214     }                                                           \
 215   while (0)
 216
 217 #undef TARGET_ASM_NAMED_SECTION
 218 #define TARGET_ASM_NAMED_SECTION i386_solaris_elf_named_section
 219
 220 /* Sun as requires "h" flag for large sections, GNU as can do without, but
 221    accepts "l".  */
 222 #ifdef USE_GAS
 223 #define MACH_DEP_SECTION_ASM_FLAG 'l'
 224 #else
 225 #define MACH_DEP_SECTION_ASM_FLAG 'h'
 226 #endif
 227
 228 #ifndef USE_GAS
 229 /* Emit COMDAT group signature symbols for Sun as.  */
 230 #undef TARGET_ASM_FILE_END
 231 #define TARGET_ASM_FILE_END solaris_file_end
 232 #endif
 233
 234 /* Unlike GNU ld, Sun ld doesn't coalesce .ctors.N/.dtors.N sections, so
 235    inhibit their creation.  Also cf. sparc/sysv4.h.  */
 236 #ifndef USE_GLD
 237 #define CTORS_SECTION_ASM_OP    "\t.section\t.ctors, \"aw\""
 238 #define DTORS_SECTION_ASM_OP    "\t.section\t.dtors, \"aw\""
 239 #endif
 240
 241 #ifndef USE_GAS
 242 #define LARGECOMM_SECTION_ASM_OP "\t.lbcomm\t"
 243 #endif
 244
 245 #define USE_IX86_FRAME_POINTER 1
 246 #define USE_X86_64_FRAME_POINTER 1
 247
 248 #undef NO_PROFILE_COUNTERS
 249
 250 #undef MCOUNT_NAME
 251 #define MCOUNT_NAME "_mcount"
 252
 253 /* We do not need NT_VERSION notes.  */
 254 #undef X86_FILE_START_VERSION_DIRECTIVE
 255 #define X86_FILE_START_VERSION_DIRECTIVE false
 256
 257 /* Only recent versions of Solaris 11 ld properly support hidden .gnu.linkonce
 258    sections, so don't use them.  */
 259 #ifndef USE_GLD
 260 #define USE_HIDDEN_LINKONCE 0
 261 #endif