gcc/config/i386/sol2.h

   1 /* Target definitions for GCC for Intel 80386 running Solaris 2
   2    Copyright (C) 1993-2022 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 cannot 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 #undef CPP_SPEC
  55 #define CPP_SPEC "%(cpp_subtarget)"
  56
  57 #undef CC1_SPEC
  58 #define CC1_SPEC "%(cc1_cpu) " ASAN_CC1_SPEC \
  59   " %{mx32:%e-mx32 is not supported on Solaris}"
  60
  61 /* GNU as understands --32 and --64, but the native Solaris
  62    assembler requires -xarch=generic or -xarch=generic64 instead.  */
  63 #ifdef USE_GAS
  64 #define ASM_CPU32_DEFAULT_SPEC "--32"
  65 #define ASM_CPU64_DEFAULT_SPEC "--64"
  66 #else
  67 #define ASM_CPU32_DEFAULT_SPEC "-xarch=generic"
  68 #define ASM_CPU64_DEFAULT_SPEC "-xarch=generic64"
  69 #endif
  70
  71 /* Since Studio 12.6, as needs -xbrace_comment=no so its AVX512 syntax is
  72    fully compatible with gas.  */
  73 #ifdef HAVE_AS_XBRACE_COMMENT_OPTION
  74 #define ASM_XBRACE_COMMENT_SPEC "-xbrace_comment=no"
  75 #else
  76 #define ASM_XBRACE_COMMENT_SPEC ""
  77 #endif
  78
  79 #undef ASM_CPU_SPEC
  80 #define ASM_CPU_SPEC "%(asm_cpu_default) " ASM_XBRACE_COMMENT_SPEC
  81
  82 /* Don't include ASM_PIC_SPEC.  While the Solaris 10+ assembler accepts -K PIC,
  83    it gives many warnings:
  84         Absolute relocation is used for symbol "<symbol>"
  85    GNU as doesn't recognize -K at all.  */
  86 #undef ASM_SPEC
  87 #define ASM_SPEC ASM_SPEC_BASE
  88
  89 #define DEFAULT_ARCH32_P !TARGET_64BIT_DEFAULT
  90
  91 #define ARCH64_SUBDIR "amd64"
  92
  93 #ifdef USE_GLD
  94 /* Since binutils 2.21, GNU ld supports new *_sol2 emulations to strictly
  95    follow the Solaris 2 ABI.  Prefer them if present.  */
  96 #ifdef HAVE_LD_SOL2_EMULATION
  97 #define ARCH32_EMULATION "elf_i386_sol2"
  98 #define ARCH64_EMULATION "elf_x86_64_sol2"
  99 #else
 100 #define ARCH32_EMULATION "elf_i386"
 101 #define ARCH64_EMULATION "elf_x86_64"
 102 #endif
 103 #endif
 104
 105 #define ENDFILE_ARCH_SPEC \
 106   "%{mpc32:crtprec32.o%s} \
 107    %{mpc64:crtprec64.o%s} \
 108    %{mpc80:crtprec80.o%s}"
 109
 110 #define SUBTARGET_CPU_EXTRA_SPECS \
 111   { "cpp_subtarget",     CPP_SUBTARGET_SPEC },          \
 112   { "asm_cpu",           ASM_CPU_SPEC },                \
 113   { "asm_cpu_default",   ASM_CPU_DEFAULT_SPEC },        \
 114
 115 /* Register the Solaris-specific #pragma directives.  */
 116 #define REGISTER_SUBTARGET_PRAGMAS() solaris_register_pragmas ()
 117
 118 #undef LOCAL_LABEL_PREFIX
 119 #define LOCAL_LABEL_PREFIX "."
 120
 121 /* The 32-bit Solaris assembler does not support .quad.  Do not use it.  */
 122 #ifndef HAVE_AS_IX86_QUAD
 123 #undef ASM_QUAD
 124 #endif
 125
 126 /* The native Solaris assembler can't calculate the difference between
 127    symbols in different sections, which causes problems for -fPIC jump
 128    tables in .rodata.  */
 129 #ifndef HAVE_AS_IX86_DIFF_SECT_DELTA
 130 #undef JUMP_TABLES_IN_TEXT_SECTION
 131 #define JUMP_TABLES_IN_TEXT_SECTION 1
 132
 133 /* The native Solaris assembler cannot handle the SYMBOL-. syntax, but
 134    requires SYMBOL@rel/@rel64 instead.  */
 135 #define ASM_OUTPUT_DWARF_PCREL(FILE, SIZE, LABEL)       \
 136   do {                                                  \
 137     fputs (integer_asm_op (SIZE, FALSE), FILE);         \
 138     assemble_name (FILE, LABEL);                        \
 139     fputs (SIZE == 8 ? "@rel64" : "@rel", FILE);        \
 140   } while (0)
 141 #endif
 142
 143 /* The Solaris assembler wants a .local for non-exported aliases.  */
 144 #define ASM_OUTPUT_DEF_FROM_DECLS(FILE, DECL, TARGET)   \
 145   do {                                                  \
 146     tree id = DECL_ASSEMBLER_NAME (DECL);               \
 147     ultimate_transparent_alias_target (&id);            \
 148     const char *declname = IDENTIFIER_POINTER (id);     \
 149     ASM_OUTPUT_DEF ((FILE), declname,                   \
 150                     IDENTIFIER_POINTER (TARGET));       \
 151     if (! TREE_PUBLIC (DECL))                           \
 152       {                                                 \
 153         fprintf ((FILE), "%s", LOCAL_ASM_OP);           \
 154         assemble_name ((FILE), declname);               \
 155         fprintf ((FILE), "\n");                         \
 156       }                                                 \
 157   } while (0)
 158
 159 #ifndef USE_GAS
 160 /* The Sun assembler uses .tcomm for TLS common sections.  */
 161 #define TLS_COMMON_ASM_OP ".tcomm"
 162
 163 /* Similar to the Sun assembler on SPARC, the native assembler requires
 164    TLS objects to be declared as @tls_obj (not @tls_object).  Unlike SPARC,
 165    gas doesn't understand this variant.  */
 166 #undef  ASM_DECLARE_OBJECT_NAME
 167 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)               \
 168   do                                                            \
 169     {                                                           \
 170       HOST_WIDE_INT size;                                       \
 171                                                                 \
 172       if (targetm.have_tls && DECL_THREAD_LOCAL_P (DECL))       \
 173         ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "tls_obj");      \
 174       else                                                      \
 175         ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");       \
 176                                                                 \
 177       size_directive_output = 0;                                \
 178       if (!flag_inhibit_size_directive                          \
 179           && (DECL) && DECL_SIZE (DECL))                        \
 180         {                                                       \
 181           size_directive_output = 1;                            \
 182           size = int_size_in_bytes (TREE_TYPE (DECL));          \
 183           ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size);         \
 184         }                                                       \
 185                                                                 \
 186       ASM_OUTPUT_LABEL (FILE, NAME);                            \
 187     }                                                           \
 188   while (0)
 189 #endif /* !USE_GAS */
 190
 191 /* As in sparc/sol2.h, override the default from i386/x86-64.h to work
 192    around Sun as TLS bug.  */
 193 #undef  ASM_OUTPUT_ALIGNED_DECL_COMMON
 194 #define ASM_OUTPUT_ALIGNED_DECL_COMMON(FILE, DECL, NAME, SIZE, ALIGN)   \
 195   do                                                                    \
 196     {                                                                   \
 197       if (TARGET_SUN_TLS                                                \
 198           && in_section                                                 \
 199           && ((in_section->common.flags & SECTION_TLS) == SECTION_TLS)) \
 200         switch_to_section (bss_section);                                \
 201       x86_elf_aligned_decl_common (FILE, DECL, NAME, SIZE, ALIGN);      \
 202     }                                                                   \
 203   while  (0)
 204
 205 /* Output a simple call for .init/.fini.  */
 206 #define ASM_OUTPUT_CALL(FILE, FN)                               \
 207   do                                                            \
 208     {                                                           \
 209       fprintf (FILE, "\tcall\t");                               \
 210       ix86_print_operand (FILE, XEXP (DECL_RTL (FN), 0), 'P');  \
 211       fprintf (FILE, "\n");                                     \
 212     }                                                           \
 213   while (0)
 214
 215 #undef TARGET_ASM_NAMED_SECTION
 216 #define TARGET_ASM_NAMED_SECTION i386_solaris_elf_named_section
 217
 218 /* Sun as requires "h" flag for large sections, GNU as can do without, but
 219    accepts "l".  */
 220 #ifdef USE_GAS
 221 #define MACH_DEP_SECTION_ASM_FLAG 'l'
 222 #else
 223 #define MACH_DEP_SECTION_ASM_FLAG 'h'
 224 #endif
 225
 226 #ifndef USE_GAS
 227 /* Emit COMDAT group signature symbols for Sun as.  */
 228 #undef TARGET_ASM_FILE_END
 229 #define TARGET_ASM_FILE_END solaris_file_end
 230 #endif
 231
 232 /* Unlike GNU ld, Sun ld doesn't coalesce .ctors.N/.dtors.N sections, so
 233    inhibit their creation.  Also cf. sparc/sysv4.h.  */
 234 #ifndef USE_GLD
 235 #define CTORS_SECTION_ASM_OP    "\t.section\t.ctors, \"aw\""
 236 #define DTORS_SECTION_ASM_OP    "\t.section\t.dtors, \"aw\""
 237 #endif
 238
 239 #ifndef USE_GAS
 240 #define LARGECOMM_SECTION_ASM_OP "\t.lbcomm\t"
 241 #endif
 242
 243 /* -fsanitize=address is currently only supported for 32-bit.  */
 244 #define ASAN_REJECT_SPEC \
 245   DEF_ARCH64_SPEC("%e-fsanitize=address is not supported in this configuration")
 246
 247 #undef NO_PROFILE_COUNTERS
 248
 249 #undef MCOUNT_NAME
 250 #define MCOUNT_NAME "_mcount"
 251
 252 /* We do not need NT_VERSION notes.  */
 253 #undef X86_FILE_START_VERSION_DIRECTIVE
 254 #define X86_FILE_START_VERSION_DIRECTIVE false