gcc/config/mcore/mcore-elf.h

   1 /* Definitions of MCore target.
   2    Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
   3    Contributed by Cygnus Solutions.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #ifndef __MCORE_ELF_H__
  23 #define __MCORE_ELF_H__
  24
  25 /* Run-time Target Specification.  */
  26 #define TARGET_VERSION fputs (" (Motorola MCORE/elf)", stderr)
  27
  28 /* Use DWARF2 debugging info.  */
  29 #define DWARF2_DEBUGGING_INFO 1
  30
  31 #undef  PREFERRED_DEBUGGING_TYPE
  32 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
  33
  34 #define EXPORTS_SECTION_ASM_OP  "\t.section .exports"
  35
  36 #define SUBTARGET_EXTRA_SECTIONS in_exports
  37
  38 #define SUBTARGET_EXTRA_SECTION_FUNCTIONS       \
  39   EXPORT_SECTION_FUNCTION
  40
  41 #define EXPORT_SECTION_FUNCTION                                 \
  42 void                                                            \
  43 exports_section ()                                              \
  44 {                                                               \
  45   if (in_section != in_exports)                                 \
  46     {                                                           \
  47       fprintf (asm_out_file, "%s\n", EXPORTS_SECTION_ASM_OP);   \
  48       in_section = in_exports;                                  \
  49     }                                                           \
  50 }
  51
  52 #define SUBTARGET_SWITCH_SECTIONS               \
  53   case in_exports: exports_section (); break;
  54
  55
  56 #define MCORE_EXPORT_NAME(STREAM, NAME)                 \
  57   do                                                    \
  58     {                                                   \
  59       exports_section ();                               \
  60       fprintf (STREAM, "\t.ascii \" -export:%s\"\n",    \
  61                (* targetm.strip_name_encoding) (NAME)); \
  62     }                                                   \
  63   while (0);
  64
  65 /* Write the extra assembler code needed to declare a function properly.
  66    Some svr4 assemblers need to also have something extra said about the
  67    function's return value.  We allow for that here.  */
  68 #undef  ASM_DECLARE_FUNCTION_NAME
  69 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
  70   do                                                            \
  71     {                                                           \
  72       if (mcore_dllexport_name_p (NAME))                        \
  73         {                                                       \
  74           MCORE_EXPORT_NAME (FILE, NAME);                       \
  75           function_section (DECL);                              \
  76         }                                                       \
  77       ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");       \
  78       ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));            \
  79       ASM_OUTPUT_LABEL (FILE, NAME);                            \
  80     }                                                           \
  81   while (0)
  82
  83 /* Write the extra assembler code needed to declare an object properly.  */
  84 #undef  ASM_DECLARE_OBJECT_NAME
  85 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)               \
  86   do                                                            \
  87     {                                                           \
  88       HOST_WIDE_INT size;                                       \
  89       if (mcore_dllexport_name_p (NAME))                        \
  90         {                                                       \
  91           enum in_section save_section = in_section;            \
  92           MCORE_EXPORT_NAME (FILE, NAME);                       \
  93           switch_to_section (save_section, (DECL));             \
  94         }                                                       \
  95       ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");         \
  96       size_directive_output = 0;                                \
  97       if (!flag_inhibit_size_directive && DECL_SIZE (DECL))     \
  98         {                                                       \
  99           size_directive_output = 1;                            \
 100           size = int_size_in_bytes (TREE_TYPE (DECL));          \
 101           ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size);         \
 102         }                                                       \
 103       ASM_OUTPUT_LABEL(FILE, NAME);                             \
 104     }                                                           \
 105   while (0)
 106
 107 /* Output the size directive for a decl in rest_of_decl_compilation
 108    in the case where we did not do so before the initializer.
 109    Once we find the error_mark_node, we know that the value of
 110    size_directive_output was set
 111    by ASM_DECLARE_OBJECT_NAME when it was run for the same decl.  */
 112 #undef  ASM_FINISH_DECLARE_OBJECT
 113 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)         \
 114   do                                                                     \
 115     {                                                                    \
 116       const char * name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);           \
 117       HOST_WIDE_INT size;                                                \
 118       if (!flag_inhibit_size_directive && DECL_SIZE (DECL)               \
 119           && ! AT_END && TOP_LEVEL                                       \
 120           && DECL_INITIAL (DECL) == error_mark_node                      \
 121           && !size_directive_output)                                     \
 122         {                                                                \
 123           size_directive_output = 1;                                     \
 124           size = int_size_in_bytes (TREE_TYPE (DECL));                   \
 125           ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size);                  \
 126         }                                                                \
 127     }                                                                    \
 128   while (0)
 129
 130
 131 #undef  STARTFILE_SPEC
 132 #define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s"
 133
 134 /* Include the OS stub library, so that the code can be simulated.
 135    This is not the right way to do this.  Ideally this kind of thing
 136    should be done in the linker script - but I have not worked out how
 137    to specify the location of a linker script in a gcc command line yet.  */
 138 #undef  ENDFILE_SPEC
 139 #define ENDFILE_SPEC  "%{!mno-lsim:-lsim} crtend.o%s crtn.o%s"
 140
 141 /* The subroutine calls in the .init and .fini sections create literal
 142    pools which must be jumped around...  */
 143 #define FORCE_CODE_SECTION_ALIGN        asm ("br 1f ; .literals ; 1:");
 144
 145 #undef  CTORS_SECTION_ASM_OP
 146 #define CTORS_SECTION_ASM_OP    "\t.section\t.ctors,\"aw\""
 147 #undef  DTORS_SECTION_ASM_OP
 148 #define DTORS_SECTION_ASM_OP    "\t.section\t.dtors,\"aw\""
 149
 150 #endif /* __MCORE_ELF_H__ */