gcc/config/sparc/sysv4.h

   1 /* Target definitions for GNU compiler for SPARC running System V.4
   2    Copyright (C) 1991, 1992, 1995, 1996, 1997, 1998, 2000, 2002, 2007, 2009,
   3    2010
   4    Free Software Foundation, Inc.
   5    Contributed by Ron Guilmette (rfg@monkeys.com).
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 3, or (at your option)
  12 any later version.
  13
  14 GCC is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GCC; see the file COPYING3.  If not see
  21 <http://www.gnu.org/licenses/>.  */
  22
  23 #ifndef TARGET_VERSION
  24 #define TARGET_VERSION fprintf (stderr, " (sparc ELF)");
  25 #endif
  26
  27 /* ??? Put back the SIZE_TYPE/PTRDIFF_TYPE definitions set by sparc.h.
  28    Why, exactly, is svr4.h messing with this?  Seems like the chip
  29    would know best.  */
  30
  31 #undef SIZE_TYPE
  32 #define SIZE_TYPE (TARGET_ARCH64 ? "long unsigned int" : "unsigned int")
  33
  34 #undef PTRDIFF_TYPE
  35 #define PTRDIFF_TYPE (TARGET_ARCH64 ? "long int" : "int")
  36
  37 /* Undefined some symbols which are defined in "svr4.h" but which are
  38    appropriate only for typical svr4 systems, but not for the specific
  39    case of svr4 running on a SPARC.  */
  40
  41 #undef INIT_SECTION_ASM_OP
  42 #undef FINI_SECTION_ASM_OP
  43 #undef READONLY_DATA_SECTION_ASM_OP
  44 #undef TYPE_OPERAND_FMT
  45 #undef STRING_ASM_OP
  46 #undef COMMON_ASM_OP
  47 #undef SKIP_ASM_OP
  48 #undef SET_ASM_OP       /* Has no equivalent.  See ASM_OUTPUT_DEF below.  */
  49
  50 /* Pass -K to the assembler when PIC.  */
  51 #undef ASM_SPEC
  52 #define ASM_SPEC \
  53   "%{v:-V} %{Qy:} %{!Qn:-Qy} %{n} %{T} %{Ym,*} %{Yd,*} %{Wa,*:%*} \
  54    %{fpic|fPIC|fpie|fPIE:-K PIC} %(asm_cpu)"
  55
  56 /* Define the names of various pseudo-op used by the SPARC/svr4 assembler.
  57    Note that many of these are different from the typical pseudo-ops used
  58    by most svr4 assemblers.  That is probably due to a (misguided?) attempt
  59    to keep the SPARC/svr4 assembler somewhat compatible with the SPARC/SunOS
  60    assembler.  */
  61
  62 #define STRING_ASM_OP           "\t.asciz\t"
  63 #define COMMON_ASM_OP           "\t.common\t"
  64 #define SKIP_ASM_OP             "\t.skip\t"
  65
  66 /* This is the format used to print the second operand of a .type pseudo-op
  67    for the SPARC/svr4 assembler.  */
  68
  69 #define TYPE_OPERAND_FMT      "#%s"
  70
  71 #undef ASM_OUTPUT_CASE_LABEL
  72 #define ASM_OUTPUT_CASE_LABEL(FILE, PREFIX, NUM, JUMPTABLE)             \
  73 do { ASM_OUTPUT_ALIGN ((FILE), Pmode == SImode ? 2 : 3);                \
  74      (*targetm.asm_out.internal_label) ((FILE), PREFIX, NUM);           \
  75    } while (0)
  76
  77 /* This is how to equate one symbol to another symbol.  The syntax used is
  78    `SYM1=SYM2'.  Note that this is different from the way equates are done
  79    with most svr4 assemblers, where the syntax is `.set SYM1,SYM2'.  */
  80
  81 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
  82  do {   fprintf ((FILE), "\t");                                         \
  83         assemble_name (FILE, LABEL1);                                   \
  84         fprintf (FILE, " = ");                                          \
  85         assemble_name (FILE, LABEL2);                                   \
  86         fprintf (FILE, "\n");                                           \
  87   } while (0)
  88
  89 /* A set of symbol definitions for assembly pseudo-ops which will
  90    get us switched to various sections of interest.  These are used
  91    in all places where we simply want to switch to a section, and
  92    *not* to push the previous section name onto the assembler's
  93    section names stack (as we do often in dwarfout.c).  */
  94
  95 #define TEXT_SECTION_ASM_OP     "\t.section\t\".text\""
  96 #define DATA_SECTION_ASM_OP     "\t.section\t\".data\""
  97 #define BSS_SECTION_ASM_OP      "\t.section\t\".bss\""
  98 #define READONLY_DATA_SECTION_ASM_OP "\t.section\t\".rodata\""
  99 #define INIT_SECTION_ASM_OP     "\t.section\t\".init\""
 100 #define FINI_SECTION_ASM_OP     "\t.section\t\".fini\""
 101
 102 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
 103
 104    Note that we want to give these sections the SHF_WRITE attribute
 105    because these sections will actually contain data (i.e. tables of
 106    addresses of functions in the current root executable or shared library
 107    file) and, in the case of a shared library, the relocatable addresses
 108    will have to be properly resolved/relocated (and then written into) by
 109    the dynamic linker when it actually attaches the given shared library
 110    to the executing process.  (Note that on SVR4, you may wish to use the
 111    `-z text' option to the ELF linker, when building a shared library, as
 112    an additional check that you are doing everything right.  But if you do
 113    use the `-z text' option when building a shared library, you will get
 114    errors unless the .ctors and .dtors sections are marked as writable
 115    via the SHF_WRITE attribute.)  */
 116
 117 #undef CTORS_SECTION_ASM_OP
 118 #define CTORS_SECTION_ASM_OP    "\t.section\t\".ctors\",#alloc,#write"
 119 #undef DTORS_SECTION_ASM_OP
 120 #define DTORS_SECTION_ASM_OP    "\t.section\t\".dtors\",#alloc,#write"
 121
 122 #undef ASM_OUTPUT_ALIGNED_BSS
 123 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
 124   asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
 125
 126 /* Override the name of the mcount profiling function.  */
 127
 128 #undef MCOUNT_FUNCTION
 129 #define MCOUNT_FUNCTION "*_mcount"