gcc/config/pa/elf.h

   1 /* Definitions for ELF assembler support.
   2    Copyright (C) 1999, 2003 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 2, 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 COPYING.  If not, write to
  18 the Free Software Foundation, 59 Temple Place - Suite 330,
  19 Boston, MA 02111-1307, USA.  */
  20
  21 /* So we can conditionalize small amounts of code in pa.c or pa.md.  */
  22 #define OBJ_ELF
  23
  24 #define ENDFILE_SPEC "crtend.o%s"
  25
  26 #define STARTFILE_SPEC "%{!shared: \
  27                          %{!symbolic: \
  28                           %{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:crt0.o%s}}}}\
  29                         crtbegin.o%s"
  30
  31 #define TEXT_SECTION_ASM_OP "\t.text"
  32 #define DATA_SECTION_ASM_OP "\t.data"
  33 #define BSS_SECTION_ASM_OP "\t.section\t.bss"
  34
  35 #define TARGET_ASM_FILE_START pa_elf_file_start
  36
  37 #undef ASM_DECLARE_FUNCTION_NAME
  38 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
  39 do {  \
  40   if (TREE_PUBLIC (DECL)) \
  41     { \
  42       fputs ("\t.EXPORT ", FILE); \
  43       assemble_name (FILE, NAME); \
  44       fputs (",ENTRY\n", FILE); \
  45     } \
  46    } while (0)
  47
  48 /* This is how to output a command to make the user-level label named NAME
  49    defined for reference from other files.
  50
  51    We call assemble_name, which in turn sets TREE_SYMBOL_REFERENCED.  This
  52    macro will restore the original value of TREE_SYMBOL_REFERENCED to avoid
  53    placing useless function definitions in the output file.
  54
  55    Also note that the SOM based tools need the symbol imported as a CODE
  56    symbol, while the ELF based tools require the symbol to be imported as
  57    an ENTRY symbol.  What a crock.  */
  58
  59 #define ASM_OUTPUT_EXTERNAL(FILE, DECL, NAME)   \
  60   do { int save_referenced;                                     \
  61        save_referenced = TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (DECL)); \
  62        fputs ("\t.IMPORT ", FILE);                                      \
  63          assemble_name (FILE, NAME);                            \
  64        if (FUNCTION_NAME_P (NAME))                              \
  65          fputs (",ENTRY\n", FILE);                              \
  66        else                                                     \
  67          fputs (",DATA\n", FILE);                               \
  68        TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (DECL)) = save_referenced; \
  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          hppa_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)