gcc/config/mcore/mcore-elf.h

   1 /* Definitions of MCore target.
   2    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2004
   3    Free Software Foundation, Inc.
   4    Contributed by Cygnus Solutions.
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  21 Boston, MA 02110-1301, USA.  */
  22
  23 #ifndef __MCORE_ELF_H__
  24 #define __MCORE_ELF_H__
  25
  26 /* Run-time Target Specification.  */
  27 #define TARGET_VERSION fputs (" (Motorola MCORE/elf)", stderr)
  28
  29 /* Use DWARF2 debugging info.  */
  30 #define DWARF2_DEBUGGING_INFO 1
  31
  32 #undef  PREFERRED_DEBUGGING_TYPE
  33 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
  34
  35 #define EXPORTS_SECTION_ASM_OP  "\t.section .exports"
  36
  37 #define SUBTARGET_EXTRA_SECTIONS in_exports
  38
  39 #define SUBTARGET_EXTRA_SECTION_FUNCTIONS       \
  40   EXPORT_SECTION_FUNCTION
  41
  42 #define EXPORT_SECTION_FUNCTION                                 \
  43 void                                                            \
  44 exports_section ()                                              \
  45 {                                                               \
  46   if (in_section != in_exports)                                 \
  47     {                                                           \
  48       fprintf (asm_out_file, "%s\n", EXPORTS_SECTION_ASM_OP);   \
  49       in_section = in_exports;                                  \
  50     }                                                           \
  51 }
  52
  53 #define SUBTARGET_SWITCH_SECTIONS               \
  54   case in_exports: exports_section (); break;
  55
  56
  57 #define MCORE_EXPORT_NAME(STREAM, NAME)                 \
  58   do                                                    \
  59     {                                                   \
  60       exports_section ();                               \
  61       fprintf (STREAM, "\t.ascii \" -export:%s\"\n",    \
  62                (* targetm.strip_name_encoding) (NAME)); \
  63     }                                                   \
  64   while (0);
  65
  66 /* Write the extra assembler code needed to declare a function properly.
  67    Some svr4 assemblers need to also have something extra said about the
  68    function's return value.  We allow for that here.  */
  69 #undef  ASM_DECLARE_FUNCTION_NAME
  70 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
  71   do                                                            \
  72     {                                                           \
  73       if (mcore_dllexport_name_p (NAME))                        \
  74         {                                                       \
  75           MCORE_EXPORT_NAME (FILE, NAME);                       \
  76           function_section (DECL);                              \
  77         }                                                       \
  78       ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");       \
  79       ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));            \
  80       ASM_OUTPUT_LABEL (FILE, NAME);                            \
  81     }                                                           \
  82   while (0)
  83
  84 /* Write the extra assembler code needed to declare an object properly.  */
  85 #undef  ASM_DECLARE_OBJECT_NAME
  86 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)               \
  87   do                                                            \
  88     {                                                           \
  89       HOST_WIDE_INT size;                                       \
  90       if (mcore_dllexport_name_p (NAME))                        \
  91         {                                                       \
  92           enum in_section save_section = in_section;            \
  93           MCORE_EXPORT_NAME (FILE, NAME);                       \
  94           switch_to_section (save_section, (DECL));             \
  95         }                                                       \
  96       ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");         \
  97       size_directive_output = 0;                                \
  98       if (!flag_inhibit_size_directive && DECL_SIZE (DECL))     \
  99         {                                                       \
 100           size_directive_output = 1;                            \
 101           size = int_size_in_bytes (TREE_TYPE (DECL));          \
 102           ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size);         \
 103         }                                                       \
 104       ASM_OUTPUT_LABEL(FILE, NAME);                             \
 105     }                                                           \
 106   while (0)
 107
 108 /* Output the size directive for a decl in rest_of_decl_compilation
 109    in the case where we did not do so before the initializer.
 110    Once we find the error_mark_node, we know that the value of
 111    size_directive_output was set
 112    by ASM_DECLARE_OBJECT_NAME when it was run for the same decl.  */
 113 #undef  ASM_FINISH_DECLARE_OBJECT
 114 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)         \
 115   do                                                                     \
 116     {                                                                    \
 117       const char * name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);           \
 118       HOST_WIDE_INT size;                                                \
 119       if (!flag_inhibit_size_directive && DECL_SIZE (DECL)               \
 120           && ! AT_END && TOP_LEVEL                                       \
 121           && DECL_INITIAL (DECL) == error_mark_node                      \
 122           && !size_directive_output)                                     \
 123         {                                                                \
 124           size_directive_output = 1;                                     \
 125           size = int_size_in_bytes (TREE_TYPE (DECL));                   \
 126           ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size);                  \
 127         }                                                                \
 128     }                                                                    \
 129   while (0)
 130
 131
 132 #undef  STARTFILE_SPEC
 133 #define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s"
 134
 135 /* Include the OS stub library, so that the code can be simulated.
 136    This is not the right way to do this.  Ideally this kind of thing
 137    should be done in the linker script - but I have not worked out how
 138    to specify the location of a linker script in a gcc command line yet.  */
 139 #undef  ENDFILE_SPEC
 140 #define ENDFILE_SPEC  "%{!mno-lsim:-lsim} crtend.o%s crtn.o%s"
 141
 142 /* The subroutine calls in the .init and .fini sections create literal
 143    pools which must be jumped around....  */
 144 #define FORCE_CODE_SECTION_ALIGN        asm ("br 1f ; .literals ; 1:");
 145
 146 #undef  CTORS_SECTION_ASM_OP
 147 #define CTORS_SECTION_ASM_OP    "\t.section\t.ctors,\"aw\""
 148 #undef  DTORS_SECTION_ASM_OP
 149 #define DTORS_SECTION_ASM_OP    "\t.section\t.dtors,\"aw\""
 150
 151 #endif /* __MCORE_ELF_H__ */