mcore-elf.h revision 1.6 
1/* Definitions of MCore target.
2   Copyright (C) 1998-2016 Free Software Foundation, Inc.
3   Contributed by Cygnus Solutions.
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 3, or (at your option)
10any later version.
11
12GCC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along 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__ */
126