gcc/config/pa/elf.h

   1 /* Definitions for ELF assembler support.
   2    Copyright (C) 1999-2015 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 3, or (at your option)
   9 any later version.
  10
  11 GCC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 /* So we can conditionalize small amounts of code in pa.c or pa.md.  */
  21 #define OBJ_ELF
  22
  23 #define ENDFILE_SPEC "crtend.o%s"
  24
  25 #define STARTFILE_SPEC "%{!shared: \
  26                          %{!symbolic: \
  27                           %{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}}\
  28                         crtbegin.o%s"
  29
  30 #define TEXT_SECTION_ASM_OP "\t.text"
  31 #define DATA_SECTION_ASM_OP "\t.data"
  32 #define BSS_SECTION_ASM_OP "\t.section\t.bss"
  33
  34 #define TARGET_ASM_FILE_START pa_elf_file_start
  35
  36 #undef ASM_DECLARE_FUNCTION_NAME
  37 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
  38 do {  \
  39   if (TREE_PUBLIC (DECL)) \
  40     { \
  41       fputs ("\t.EXPORT ", FILE); \
  42       assemble_name (FILE, NAME); \
  43       fputs (",ENTRY\n", FILE); \
  44     } \
  45    } while (0)
  46
  47 /* This is how to output a command to make the user-level label
  48    named NAME defined for reference from other files.  We use
  49    assemble_name_raw instead of assemble_name since a symbol in
  50    a .IMPORT directive that isn't otherwise referenced is not
  51    placed in the symbol table of the assembled object.
  52
  53    Failure to import a function reference can cause the HP linker
  54    to segmentation fault!
  55
  56    Note that the SOM based tools need the symbol imported as a
  57    CODE symbol, while the ELF based tools require the symbol to
  58    be imported as an ENTRY symbol.  */
  59
  60 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME) \
  61   pa_hpux_asm_output_external ((FILE), (DECL), (NAME))
  62 #define ASM_OUTPUT_EXTERNAL_REAL(FILE, DECL, NAME) \
  63   do { fputs ("\t.IMPORT ", FILE);                                      \
  64        assemble_name_raw (FILE, NAME);                                  \
  65        if (FUNCTION_NAME_P (NAME))                                      \
  66          fputs (",ENTRY\n", FILE);                                      \
  67        else                                                             \
  68          fputs (",DATA\n", FILE);                                       \
  69      } while (0)
  70
  71 /* The bogus HP assembler requires ALL external references to be
  72    "imported", even library calls. They look a bit different, so
  73    here's this macro.
  74
  75    Also note not all libcall names are passed to
  76    targetm.encode_section_info (__main for example).  To make sure all
  77    libcall names have section info recorded in them, we do it here.  */
  78
  79 #undef ASM_OUTPUT_EXTERNAL_LIBCALL
  80 #define ASM_OUTPUT_EXTERNAL_LIBCALL(FILE, RTL) \
  81   do { fputs ("\t.IMPORT ", FILE);                                      \
  82        if (!function_label_operand (RTL, VOIDmode))                     \
  83          pa_encode_label (RTL);                                         \
  84        assemble_name (FILE, XSTR ((RTL), 0));                           \
  85        fputs (",ENTRY\n", FILE);                                        \
  86      } while (0)
  87
  88 /* Biggest alignment supported by the object file format of this
  89    machine.  Use this macro to limit the alignment which can be
  90    specified using the `__attribute__ ((aligned (N)))' construct.  If
  91    not defined, the default value is `BIGGEST_ALIGNMENT'.  */
  92 #define MAX_OFILE_ALIGNMENT (32768 * 8)