gcc/config/ia64/sysv4.h

   1 /* Override definitions in elfos.h to be correct for IA64.
   2
   3 Copyright (C) 2000-2025 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 /* Various pseudo-ops for which the Intel assembler uses non-standard
  34    definitions.  */
  35
  36 #undef STRING_ASM_OP
  37 #define STRING_ASM_OP "\tstringz\t"
  38
  39 #undef SKIP_ASM_OP
  40 #define SKIP_ASM_OP "\t.skip\t"
  41
  42 #undef COMMON_ASM_OP
  43 #define COMMON_ASM_OP "\t.common\t"
  44
  45 #undef ASCII_DATA_ASM_OP
  46 #define ASCII_DATA_ASM_OP "\tstring\t"
  47
  48 /* ia64-specific options for gas
  49    ??? ia64 gas doesn't accept standard svr4 assembler options?  */
  50 #undef ASM_SPEC
  51 #define ASM_SPEC "-x %{mconstant-gp} %{mauto-pic} %(asm_extra)"
  52
  53 /* ??? Unfortunately, .lcomm doesn't work, because it puts things in either
  54    .bss or .sbss, and we can't control the decision of which is used.  When
  55    I use .lcomm, I get a cryptic "Section group has no member" error from
  56    the Intel simulator.  So we must explicitly put variables in .bss
  57    instead.  This matters only if we care about the Intel assembler.  */
  58
  59 /* This is asm_output_aligned_bss from varasm.cc without the
  60    (*targetm.asm_out.globalize_label) call at the beginning.  */
  61
  62 /* This is for final.cc, because it is used by ASM_DECLARE_OBJECT_NAME.  */
  63 extern int size_directive_output;
  64
  65 #undef ASM_OUTPUT_ALIGNED_LOCAL
  66 #define ASM_OUTPUT_ALIGNED_DECL_LOCAL(FILE, DECL, NAME, SIZE, ALIGN) \
  67 do {                                                                    \
  68   if ((DECL) && sdata_symbolic_operand (XEXP (DECL_RTL (DECL), 0), Pmode)) \
  69     switch_to_section (sbss_section);                                   \
  70   else                                                                  \
  71     switch_to_section (bss_section);                                    \
  72   ASM_OUTPUT_ALIGN (FILE, floor_log2 ((ALIGN) / BITS_PER_UNIT));        \
  73   ASM_DECLARE_OBJECT_NAME (FILE, NAME, DECL);                           \
  74   ASM_OUTPUT_SKIP (FILE, SIZE ? SIZE : 1);                              \
  75 } while (0)
  76
  77 /* The # tells the Intel assembler that this is not a register name.
  78    However, we can't emit the # in a label definition, so we set a variable
  79    in ASM_OUTPUT_LABEL to control whether we want the postfix here or not.
  80    We append the # to the label name, but since NAME can be an expression
  81    we have to scan it for a non-label character and insert the # there.  */
  82
  83 #undef ASM_OUTPUT_LABELREF
  84 #define ASM_OUTPUT_LABELREF(STREAM, NAME)       \
  85 do {                                            \
  86   const char *name_ = NAME;                     \
  87   if (*name_ == '*')                            \
  88     name_++;                                    \
  89   else                                          \
  90     fputs (user_label_prefix, STREAM);          \
  91   fputs (name_, STREAM);                        \
  92   if (!ia64_asm_output_label)                   \
  93     fputc ('#', STREAM);                        \
  94 } while (0)
  95
  96 /* Intel assembler requires both flags and type if declaring a non-predefined
  97    section.  */
  98 #undef INIT_SECTION_ASM_OP
  99 #define INIT_SECTION_ASM_OP     "\t.section\t.init,\"ax\",\"progbits\""
 100 #undef FINI_SECTION_ASM_OP
 101 #define FINI_SECTION_ASM_OP     "\t.section\t.fini,\"ax\",\"progbits\""
 102
 103 #define DEBUGGER_REGNO(REGNO) \
 104   ia64_debugger_regno(REGNO)
 105
 106 #undef SIZE_TYPE
 107 #define SIZE_TYPE "long unsigned int"
 108
 109 #undef PTRDIFF_TYPE
 110 #define PTRDIFF_TYPE "long int"
 111
 112 #undef WCHAR_TYPE
 113 #define WCHAR_TYPE "int"
 114
 115 #undef WCHAR_TYPE_SIZE
 116 #define WCHAR_TYPE_SIZE 32
 117
 118 /* We redefine this to use the ia64 .proc pseudo-op.  */
 119
 120 #undef ASM_DECLARE_FUNCTION_NAME
 121 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
 122   ia64_start_function(FILE,NAME,DECL)
 123
 124 /* We redefine this to use the ia64 .endp pseudo-op.  */
 125
 126 #undef ASM_DECLARE_FUNCTION_SIZE
 127 #define ASM_DECLARE_FUNCTION_SIZE(FILE, NAME, DECL) \
 128 do {                                                                    \
 129   fputs ("\t.endp ", FILE);                                             \
 130   assemble_name (FILE, NAME);                                           \
 131   fputc ('\n', FILE);                                                   \
 132 } while (0)
 133
 134 /* Override default elf definition.  */
 135 #undef  TARGET_ASM_RELOC_RW_MASK
 136 #define TARGET_ASM_RELOC_RW_MASK  ia64_reloc_rw_mask
 137 #undef  TARGET_ASM_SELECT_RTX_SECTION
 138 #define TARGET_ASM_SELECT_RTX_SECTION  ia64_select_rtx_section
 139
 140 #define SDATA_SECTION_ASM_OP "\t.sdata"
 141 #define SBSS_SECTION_ASM_OP "\t.sbss"