gcc/config/mcore/mcore-elf.h

   1 /* Definitions of MCore target.
   2    Copyright (C) 1998-2016 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 3, 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 COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef __MCORE_ELF_H__
  22 #define __MCORE_ELF_H__
  23
  24 /* Use DWARF2 debugging info.  */
  25 #define DWARF2_DEBUGGING_INFO 1
  26
  27 #undef  PREFERRED_DEBUGGING_TYPE
  28 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
  29
  30 #define MCORE_EXPORT_NAME(STREAM, NAME)                 \
  31   do                                                    \
  32     {                                                   \
  33       fprintf (STREAM, "\t.section .exports\n");        \
  34       fprintf (STREAM, "\t.ascii \" -export:%s\"\n",    \
  35                (* targetm.strip_name_encoding) (NAME)); \
  36       in_section = NULL;                                \
  37     }                                                   \
  38   while (0);
  39
  40 /* Write the extra assembler code needed to declare a function properly.
  41    Some svr4 assemblers need to also have something extra said about the
  42    function's return value.  We allow for that here.  */
  43 #undef  ASM_DECLARE_FUNCTION_NAME
  44 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL)             \
  45   do                                                            \
  46     {                                                           \
  47       if (mcore_dllexport_name_p (NAME))                        \
  48         {                                                       \
  49           MCORE_EXPORT_NAME (FILE, NAME);                       \
  50           switch_to_section (function_section (DECL));          \
  51         }                                                       \
  52       ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function");       \
  53       ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL));            \
  54       ASM_OUTPUT_LABEL (FILE, NAME);                            \
  55     }                                                           \
  56   while (0)
  57
  58 /* Write the extra assembler code needed to declare an object properly.  */
  59 #undef  ASM_DECLARE_OBJECT_NAME
  60 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL)               \
  61   do                                                            \
  62     {                                                           \
  63       HOST_WIDE_INT size;                                       \
  64       if (mcore_dllexport_name_p (NAME))                        \
  65         {                                                       \
  66           section *save_section = in_section;                   \
  67           MCORE_EXPORT_NAME (FILE, NAME);                       \
  68           switch_to_section (save_section);                     \
  69         }                                                       \
  70       ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object");         \
  71       size_directive_output = 0;                                \
  72       if (!flag_inhibit_size_directive && DECL_SIZE (DECL))     \
  73         {                                                       \
  74           size_directive_output = 1;                            \
  75           size = int_size_in_bytes (TREE_TYPE (DECL));          \
  76           ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size);         \
  77         }                                                       \
  78       ASM_OUTPUT_LABEL(FILE, NAME);                             \
  79     }                                                           \
  80   while (0)
  81
  82 /* Output the size directive for a decl in rest_of_decl_compilation
  83    in the case where we did not do so before the initializer.
  84    Once we find the error_mark_node, we know that the value of
  85    size_directive_output was set
  86    by ASM_DECLARE_OBJECT_NAME when it was run for the same decl.  */
  87 #undef  ASM_FINISH_DECLARE_OBJECT
  88 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END)         \
  89   do                                                                     \
  90     {                                                                    \
  91       const char * name = XSTR (XEXP (DECL_RTL (DECL), 0), 0);           \
  92       HOST_WIDE_INT size;                                                \
  93       if (!flag_inhibit_size_directive && DECL_SIZE (DECL)               \
  94           && ! AT_END && TOP_LEVEL                                       \
  95           && DECL_INITIAL (DECL) == error_mark_node                      \
  96           && !size_directive_output)                                     \
  97         {                                                                \
  98           size_directive_output = 1;                                     \
  99           size = int_size_in_bytes (TREE_TYPE (DECL));                   \
 100           ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size);                  \
 101         }                                                                \
 102     }                                                                    \
 103   while (0)
 104
 105
 106 #undef  STARTFILE_SPEC
 107 #define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s"
 108
 109 /* Include the OS stub library, so that the code can be simulated.
 110    This is not the right way to do this.  Ideally this kind of thing
 111    should be done in the linker script - but I have not worked out how
 112    to specify the location of a linker script in a gcc command line yet.  */
 113 #undef  ENDFILE_SPEC
 114 #define ENDFILE_SPEC  "%{!mno-lsim:-lsim} crtend.o%s crtn.o%s"
 115
 116 /* The subroutine calls in the .init and .fini sections create literal
 117    pools which must be jumped around....  */
 118 #define FORCE_CODE_SECTION_ALIGN        asm ("br 1f ; .literals ; 1:");
 119
 120 #undef  CTORS_SECTION_ASM_OP
 121 #define CTORS_SECTION_ASM_OP    "\t.section\t.ctors,\"aw\""
 122 #undef  DTORS_SECTION_ASM_OP
 123 #define DTORS_SECTION_ASM_OP    "\t.section\t.dtors,\"aw\""
 124
 125 #endif /* __MCORE_ELF_H__ */