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 GNU CC.
   6
   7 GNU CC 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 GNU CC 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 GNU CC; 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 #define SUBTARGET_CPP_PREDEFINES " -D__ELF__"
  29
  30 /* Use DWARF2 debugging info.  */
  31 #ifndef DWARF2_DEBUGGING_INFO
  32 #define DWARF2_DEBUGGING_INFO 1
  33 #endif
  34
  35 #undef  PREFERRED_DEBUGGING_TYPE
  36 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
  37
  38 /* But allow DWARF 1 if the user wants it.  */
  39 #ifndef DWARF_DEBUGGING_INFO
  40 #define DWARF_DEBUGGING_INFO 1
  41 #endif
  42
  43 #define EXPORTS_SECTION_ASM_OP  "\t.section .exports"
  44
  45 #define SUBTARGET_EXTRA_SECTIONS in_exports
  46
  47 #define SUBTARGET_EXTRA_SECTION_FUNCTIONS       \
  48   EXPORT_SECTION_FUNCTION
  49
  50 #define EXPORT_SECTION_FUNCTION                                 \
  51 void                                                            \
  52 exports_section ()                                              \
  53 {                                                               \
  54   if (in_section != in_exports)                                 \
  55     {                                                           \
  56       fprintf (asm_out_file, "%s\n", EXPORTS_SECTION_ASM_OP);   \
  57       in_section = in_exports;                                  \
  58     }                                                           \
  59 }
  60
  61 #define SUBTARGET_SWITCH_SECTIONS               \
  62   case in_exports: exports_section (); break;
  63
  64
  65 #define MCORE_EXPORT_NAME(STREAM, NAME)                 \
  66   do                                                    \
  67     {                                                   \
  68       exports_section ();                               \
  69       fprintf (STREAM, "\t.ascii \" -export:%s\"\n",    \
  70                (* targetm.strip_name_encoding) (NAME)); \
  71     }                                                   \
  72   while (0);
  73
  74 /* Write the extra assembler code needed to declare a function properly.
  75    Some svr4 assemblers need to also have something extra said about the
  76    function's return value.  We allow for that here.  */
  77 #undef  ASM_DECLARE_FUNCTION_NAME
  78 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)     \
  79   do                                                    \
  80     {                                                   \
  81       if (mcore_dllexport_name_p (NAME))                \
  82         {                                               \
  83           MCORE_EXPORT_NAME (FILE, NAME);               \
  84           function_section (DECL);                      \
  85         }                                               \
  86       fprintf (FILE, "%s", TYPE_ASM_OP);                \
  87       assemble_name (FILE, NAME);                       \
  88       putc (',', FILE);                                 \
  89       fprintf (FILE, TYPE_OPERAND_FMT, "function");     \
  90       putc ('\n', FILE);                                \
  91       ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));    \
  92       ASM_OUTPUT_LABEL (FILE, NAME);                    \
  93     }                                                   \
  94   while (0)
  95
  96 /* Write the extra assembler code needed to declare an object properly.  */
  97 #undef  ASM_DECLARE_OBJECT_NAME
  98 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)                               \
  99   do                                                                            \
 100     {                                                                           \
 101       if (mcore_dllexport_name_p (NAME))                                        \
 102         {                                                                       \
 103           enum in_section save_section = in_section;                            \
 104           MCORE_EXPORT_NAME (FILE, NAME);                                       \
 105           switch_to_section (save_section, (DECL));                             \
 106         }                                                                       \
 107       fprintf (FILE, "%s", TYPE_ASM_OP);                                        \
 108       assemble_name (FILE, NAME);                                               \
 109       putc (',', FILE);                                                         \
 110       fprintf (FILE, TYPE_OPERAND_FMT, "object");                               \
 111       putc ('\n', FILE);                                                        \
 112       size_directive_output = 0;                                                \
 113       if (!flag_inhibit_size_directive && DECL_SIZE (DECL))                     \
 114         {                                                                       \
 115           size_directive_output = 1;                                            \
 116           fprintf (FILE, "%s", SIZE_ASM_OP);                                    \
 117           assemble_name (FILE, NAME);                                           \
 118           fprintf (FILE, ",%d\n",  int_size_in_bytes (TREE_TYPE (DECL)));       \
 119         }                                                                       \
 120       ASM_OUTPUT_LABEL(FILE, NAME);                                             \
 121     }                                                                           \
 122   while (0)
 123
 124 /* Output the size directive for a decl in rest_of_decl_compilation
 125    in the case where we did not do so before the initializer.
 126    Once we find the error_mark_node, we know that the value of
 127    size_directive_output was set
 128    by ASM_DECLARE_OBJECT_NAME when it was run for the same decl.  */
 129 #undef  ASM_FINISH_DECLARE_OBJECT
 130 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)         \
 131   do                                                                     \
 132     {                                                                    \
 133       const char * name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);           \
 134       if (!flag_inhibit_size_directive && DECL_SIZE (DECL)               \
 135           && ! AT_END && TOP_LEVEL                                       \
 136           && DECL_INITIAL (DECL) == error_mark_node                      \
 137           && !size_directive_output)                                     \
 138         {                                                                \
 139           fprintf (FILE, "%s", SIZE_ASM_OP);                             \
 140           assemble_name (FILE, name);                                    \
 141           fprintf (FILE, ",%d\n",  int_size_in_bytes (TREE_TYPE (DECL)));\
 142         }                                                                \
 143     }                                                                    \
 144   while (0)
 145
 146
 147 #undef  STARTFILE_SPEC
 148 #define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s"
 149
 150 /* Include the OS stub library, so that the code can be simulated.
 151    This is not the right way to do this.  Ideally this kind of thing
 152    should be done in the linker script - but I have not worked out how
 153    to specify the location of a linker script in a gcc command line yet.  */
 154 #undef  ENDFILE_SPEC
 155 #define ENDFILE_SPEC  "%{!mno-lsim:-lsim} crtend.o%s crtn.o%s"
 156
 157 /* The subroutine calls in the .init and .fini sections create literal
 158    pools which must be jumped around...  */
 159 #define FORCE_CODE_SECTION_ALIGN        asm ("br 1f ; .literals ; 1:");
 160
 161 #undef  CTORS_SECTION_ASM_OP
 162 #define CTORS_SECTION_ASM_OP    "\t.section\t.ctors,\"aw\""
 163 #undef  DTORS_SECTION_ASM_OP
 164 #define DTORS_SECTION_ASM_OP    "\t.section\t.dtors,\"aw\""
 165
 166 #endif /* __MCORE_ELF_H__ */