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
   3    Free Software Foundation, Inc.
   4    Contributed by Ron Guilmette (rfg@monkeys.com).
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 3, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.  */
  21
  22 #ifndef TARGET_VERSION
  23 #define TARGET_VERSION fprintf (stderr, " (sparc ELF)");
  24 #endif
  25
  26 /* ??? Put back the SIZE_TYPE/PTRDIFF_TYPE definitions set by sparc.h.
  27    Why, exactly, is svr4.h messing with this?  Seems like the chip
  28    would know best.  */
  29
  30 #undef SIZE_TYPE
  31 #define SIZE_TYPE (TARGET_ARCH64 ? "long unsigned int" : "unsigned int")
  32
  33 #undef PTRDIFF_TYPE
  34 #define PTRDIFF_TYPE (TARGET_ARCH64 ? "long int" : "int")
  35
  36 /* Undefined some symbols which are defined in "svr4.h" but which are
  37    appropriate only for typical svr4 systems, but not for the specific
  38    case of svr4 running on a SPARC.  */
  39
  40 #undef INIT_SECTION_ASM_OP
  41 #undef FINI_SECTION_ASM_OP
  42 #undef READONLY_DATA_SECTION_ASM_OP
  43 #undef TYPE_OPERAND_FMT
  44 #undef PUSHSECTION_FORMAT
  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 #define PUSHSECTION_ASM_OP      "\t.pushsection\t"
  66 #define POPSECTION_ASM_OP       "\t.popsection"
  67
  68 /* This is the format used to print the second operand of a .type pseudo-op
  69    for the SPARC/svr4 assembler.  */
  70
  71 #define TYPE_OPERAND_FMT      "#%s"
  72
  73 /* This is the format used to print a .pushsection pseudo-op (and its operand)
  74    for the SPARC/svr4 assembler.  */
  75
  76 #define PUSHSECTION_FORMAT      "%s\"%s\"\n"
  77
  78 #undef ASM_OUTPUT_CASE_LABEL
  79 #define ASM_OUTPUT_CASE_LABEL(FILE, PREFIX, NUM, JUMPTABLE)             \
  80 do { ASM_OUTPUT_ALIGN ((FILE), Pmode == SImode ? 2 : 3);                \
  81      (*targetm.asm_out.internal_label) ((FILE), PREFIX, NUM);           \
  82    } while (0)
  83
  84 /* This is how to equate one symbol to another symbol.  The syntax used is
  85    `SYM1=SYM2'.  Note that this is different from the way equates are done
  86    with most svr4 assemblers, where the syntax is `.set SYM1,SYM2'.  */
  87
  88 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2)                              \
  89  do {   fprintf ((FILE), "\t");                                         \
  90         assemble_name (FILE, LABEL1);                                   \
  91         fprintf (FILE, " = ");                                          \
  92         assemble_name (FILE, LABEL2);                                   \
  93         fprintf (FILE, "\n");                                           \
  94   } while (0)
  95
  96 /* Define how the SPARC registers should be numbered for Dwarf output.
  97    The numbering provided here should be compatible with the native
  98    svr4 SDB debugger in the SPARC/svr4 reference port.  The numbering
  99    is as follows:
 100
 101    Assembly name        gcc internal regno      Dwarf regno
 102    ----------------------------------------------------------
 103    g0-g7                0-7                     0-7
 104    o0-o7                8-15                    8-15
 105    l0-l7                16-23                   16-23
 106    i0-i7                24-31                   24-31
 107    f0-f31               32-63                   40-71
 108 */
 109
 110 #define DBX_REGISTER_NUMBER(REGNO) ((REGNO) < 32 ? (REGNO) : (REGNO) + 8)
 111
 112 /* A set of symbol definitions for assembly pseudo-ops which will
 113    get us switched to various sections of interest.  These are used
 114    in all places where we simply want to switch to a section, and
 115    *not* to push the previous section name onto the assembler's
 116    section names stack (as we do often in dwarfout.c).  */
 117
 118 #define TEXT_SECTION_ASM_OP     "\t.section\t\".text\""
 119 #define DATA_SECTION_ASM_OP     "\t.section\t\".data\""
 120 #define BSS_SECTION_ASM_OP      "\t.section\t\".bss\""
 121 #define READONLY_DATA_SECTION_ASM_OP "\t.section\t\".rodata\""
 122 #define INIT_SECTION_ASM_OP     "\t.section\t\".init\""
 123 #define FINI_SECTION_ASM_OP     "\t.section\t\".fini\""
 124
 125 /* Define the pseudo-ops used to switch to the .ctors and .dtors sections.
 126
 127    Note that we want to give these sections the SHF_WRITE attribute
 128    because these sections will actually contain data (i.e. tables of
 129    addresses of functions in the current root executable or shared library
 130    file) and, in the case of a shared library, the relocatable addresses
 131    will have to be properly resolved/relocated (and then written into) by
 132    the dynamic linker when it actually attaches the given shared library
 133    to the executing process.  (Note that on SVR4, you may wish to use the
 134    `-z text' option to the ELF linker, when building a shared library, as
 135    an additional check that you are doing everything right.  But if you do
 136    use the `-z text' option when building a shared library, you will get
 137    errors unless the .ctors and .dtors sections are marked as writable
 138    via the SHF_WRITE attribute.)  */
 139
 140 #undef CTORS_SECTION_ASM_OP
 141 #define CTORS_SECTION_ASM_OP    "\t.section\t\".ctors\",#alloc,#write"
 142 #undef DTORS_SECTION_ASM_OP
 143 #define DTORS_SECTION_ASM_OP    "\t.section\t\".dtors\",#alloc,#write"
 144
 145 /* Switch into a generic section.  */
 146 #undef TARGET_ASM_NAMED_SECTION
 147 #define TARGET_ASM_NAMED_SECTION  sparc_elf_asm_named_section
 148
 149 #undef ASM_OUTPUT_ALIGNED_BSS
 150 #define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \
 151   asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN)
 152
 153 /* Override the name of the mcount profiling function.  */
 154
 155 #undef MCOUNT_FUNCTION
 156 #define MCOUNT_FUNCTION "*_mcount"