1  /* Definitions of MCore target. 
       2     Copyright (C) 1998-2023 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__ */