gcc/config/ia64/sysv4.h

   1 /* Override definitions in elfos.h to be correct for IA64.
   2
   3 Copyright (C) 2000-2018 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #undef TARGET_INIT_LIBFUNCS
  27 #define TARGET_INIT_LIBFUNCS ia64_sysv4_init_libfuncs
  28
  29 /* We want DWARF2 as specified by the IA64 ABI.  */
  30 #undef PREFERRED_DEBUGGING_TYPE
  31 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
  32
  33 /* Stabs does not work properly for 64-bit targets.  */
  34 #undef DBX_DEBUGGING_INFO
  35
  36 /* Various pseudo-ops for which the Intel assembler uses non-standard
  37    definitions.  */
  38
  39 #undef STRING_ASM_OP
  40 #define STRING_ASM_OP "\tstringz\t"
  41
  42 #undef SKIP_ASM_OP
  43 #define SKIP_ASM_OP "\t.skip\t"
  44
  45 #undef COMMON_ASM_OP
  46 #define COMMON_ASM_OP "\t.common\t"
  47
  48 #undef ASCII_DATA_ASM_OP
  49 #define ASCII_DATA_ASM_OP "\tstring\t"
  50
  51 /* ia64-specific options for gas
  52    ??? ia64 gas doesn't accept standard svr4 assembler options?  */
  53 #undef ASM_SPEC
  54 #define ASM_SPEC "-x %{mconstant-gp} %{mauto-pic} %(asm_extra)"
  55
  56 /* ??? Unfortunately, .lcomm doesn't work, because it puts things in either
  57    .bss or .sbss, and we can't control the decision of which is used.  When
  58    I use .lcomm, I get a cryptic "Section group has no member" error from
  59    the Intel simulator.  So we must explicitly put variables in .bss
  60    instead.  This matters only if we care about the Intel assembler.  */
  61
  62 /* This is asm_output_aligned_bss from varasm.c without the
  63    (*targetm.asm_out.globalize_label) call at the beginning.  */
  64
  65 /* This is for final.c, because it is used by ASM_DECLARE_OBJECT_NAME.  */
  66 extern int size_directive_output;
  67
  68 #undef ASM_OUTPUT_ALIGNED_LOCAL
  69 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
  70 do {                                                                    \
  71   if ((DECL) && sdata_symbolic_operand (XEXP (DECL_RTL (DECL), 0), Pmode)) \
  72     switch_to_section (sbss_section);                                   \
  73   else                                                                  \
  74     switch_to_section (bss_section);                                    \
  75   ASM_OUTPUT_ALIGN (FILE, floor_log2 ((ALIGN) / BITS_PER_UNIT));        \
  76   ASM_DECLARE_OBJECT_NAME (FILE, NAME, DECL);                           \
  77   ASM_OUTPUT_SKIP (FILE, SIZE ? SIZE : 1);                              \
  78 } while (0)
  79
  80 /* The # tells the Intel assembler that this is not a register name.
  81    However, we can't emit the # in a label definition, so we set a variable
  82    in ASM_OUTPUT_LABEL to control whether we want the postfix here or not.
  83    We append the # to the label name, but since NAME can be an expression
  84    we have to scan it for a non-label character and insert the # there.  */
  85
  86 #undef ASM_OUTPUT_LABELREF
  87 #define ASM_OUTPUT_LABELREF(STREAM, NAME)       \
  88 do {                                            \
  89   const char *name_ = NAME;                     \
  90   if (*name_ == '*')                            \
  91     name_++;                                    \
  92   else                                          \
  93     fputs (user_label_prefix, STREAM);          \
  94   fputs (name_, STREAM);                        \
  95   if (!ia64_asm_output_label)                   \
  96     fputc ('#', STREAM);                        \
  97 } while (0)
  98
  99 /* Intel assembler requires both flags and type if declaring a non-predefined
 100    section.  */
 101 #undef INIT_SECTION_ASM_OP
 102 #define INIT_SECTION_ASM_OP     "\t.section\t.init,\"ax\",\"progbits\""
 103 #undef FINI_SECTION_ASM_OP
 104 #define FINI_SECTION_ASM_OP     "\t.section\t.fini,\"ax\",\"progbits\""
 105
 106 #define DBX_REGISTER_NUMBER(REGNO) \
 107   ia64_dbx_register_number(REGNO)
 108
 109 #undef SIZE_TYPE
 110 #define SIZE_TYPE "long unsigned int"
 111
 112 #undef PTRDIFF_TYPE
 113 #define PTRDIFF_TYPE "long int"
 114
 115 #undef WCHAR_TYPE
 116 #define WCHAR_TYPE "int"
 117
 118 #undef WCHAR_TYPE_SIZE
 119 #define WCHAR_TYPE_SIZE 32
 120
 121 /* We redefine this to use the ia64 .proc pseudo-op.  */
 122
 123 #undef ASM_DECLARE_FUNCTION_NAME
 124 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
 125   ia64_start_function(FILE,NAME,DECL)
 126
 127 /* We redefine this to use the ia64 .endp pseudo-op.  */
 128
 129 #undef ASM_DECLARE_FUNCTION_SIZE
 130 #define ASM_DECLARE_FUNCTION_SIZE(FILE, NAME, DECL) \
 131 do {                                                                    \
 132   fputs ("\t.endp ", FILE);                                             \
 133   assemble_name (FILE, NAME);                                           \
 134   fputc ('\n', FILE);                                                   \
 135 } while (0)
 136
 137 /* Override default elf definition.  */
 138 #undef  TARGET_ASM_RELOC_RW_MASK
 139 #define TARGET_ASM_RELOC_RW_MASK  ia64_reloc_rw_mask
 140 #undef  TARGET_ASM_SELECT_RTX_SECTION
 141 #define TARGET_ASM_SELECT_RTX_SECTION  ia64_select_rtx_section
 142
 143 #define SDATA_SECTION_ASM_OP "\t.sdata"
 144 #define SBSS_SECTION_ASM_OP "\t.sbss"