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1 | /* Definitions of MCore target. |
2 | Copyright (C) 1998, 1999, 2000 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 | #include "svr4.h" | |
31 | #include "mcore/mcore.h" | |
32 | ||
33 | /* Use DWARF2 debugging info. */ | |
34 | #ifndef DWARF2_DEBUGGING_INFO | |
35 | #define DWARF2_DEBUGGING_INFO 1 | |
36 | #endif | |
37 | ||
38 | #undef PREFERRED_DEBUGGING_TYPE | |
39 | #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG | |
40 | ||
41 | /* But allow DWARF 1 if the user wants it. */ | |
42 | #ifndef DWARF_DEBUGGING_INFO | |
43 | #define DWARF_DEBUGGING_INFO 1 | |
44 | #endif | |
45 | ||
46 | /* The numbers used to denote specific machine registers in the System V | |
47 | Release 4 DWARF debugging information are quite likely to be totally | |
48 | different from the numbers used in BSD stabs debugging information | |
49 | for the same kind of target machine. Thus, we undefine the macro | |
50 | DBX_REGISTER_NUMBER here as an extra inducement to get people to | |
51 | provide proper machine-specific definitions of DBX_REGISTER_NUMBER | |
52 | (which is also used to provide DWARF registers numbers in dwarfout.c) | |
53 | in their tm.h files which include this file. */ | |
54 | ||
55 | #undef DBX_REGISTER_NUMBER | |
56 | #define DBX_REGISTER_NUMBER(REGNO) (REGNO) | |
57 | ||
58 | /* When using stabs, gcc2_compiled must be a stabs entry, not an | |
59 | ordinary symbol, or gdb won't see it. The stabs entry must be | |
60 | before the N_SO in order for gdb to find it. */ | |
61 | #undef ASM_IDENTIFY_GCC | |
62 | #define ASM_IDENTIFY_GCC(FILE) \ | |
63 | do \ | |
64 | { \ | |
65 | if (write_symbols != DBX_DEBUG) \ | |
66 | fputs ("gcc2_compiled.:\n", FILE); \ | |
67 | else \ | |
68 | fputs ("\t.stabs\t\"gcc2_compiled.\", 0x3c, 0, 0, 0\n", FILE); \ | |
69 | } \ | |
70 | while (0) | |
71 | ||
72 | /* MCore defines .long and .short to NOT force any alignment. | |
73 | This lets you misalign as much as you wish. */ | |
74 | #define UNALIGNED_INT_ASM_OP ".long" | |
75 | #define UNALIGNED_SHORT_ASM_OP ".short" | |
76 | ||
77 | #define EXPORTS_SECTION_ASM_OP "\t.section .exports" | |
78 | ||
79 | #define SUBTARGET_EXTRA_SECTIONS in_const, in_exports | |
80 | ||
81 | #define SUBTARGET_EXTRA_SECTION_FUNCTIONS \ | |
82 | CONST_SECTION_FUNCTION \ | |
83 | EXPORT_SECTION_FUNCTION \ | |
84 | ||
85 | /* CONST_SECTION_FUNCTION is defined svr4.h. */ | |
86 | ||
87 | #define EXPORT_SECTION_FUNCTION \ | |
88 | void \ | |
89 | exports_section () \ | |
90 | { \ | |
91 | if (in_section != in_exports) \ | |
92 | { \ | |
93 | fprintf (asm_out_file, "%s\n", EXPORTS_SECTION_ASM_OP); \ | |
94 | in_section = in_exports; \ | |
95 | } \ | |
96 | } | |
97 | ||
98 | #define SUBTARGET_SWITCH_SECTIONS \ | |
99 | case in_exports: exports_section (); break; \ | |
100 | case in_const: const_section (); break; | |
101 | ||
102 | ||
103 | #define MCORE_EXPORT_NAME(STREAM, NAME) \ | |
104 | do \ | |
105 | { \ | |
106 | exports_section (); \ | |
107 | fprintf (STREAM, "\t.ascii \" -export:%s\"\n", \ | |
108 | MCORE_STRIP_NAME_ENCODING (NAME)); \ | |
109 | } \ | |
110 | while (0); | |
111 | ||
112 | /* Write the extra assembler code needed to declare a function properly. | |
113 | Some svr4 assemblers need to also have something extra said about the | |
114 | function's return value. We allow for that here. */ | |
115 | #undef ASM_DECLARE_FUNCTION_NAME | |
116 | #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ | |
117 | do \ | |
118 | { \ | |
119 | if (mcore_dllexport_name_p (NAME)) \ | |
120 | { \ | |
121 | MCORE_EXPORT_NAME (FILE, NAME); \ | |
122 | function_section (DECL); \ | |
123 | } \ | |
124 | fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \ | |
125 | assemble_name (FILE, NAME); \ | |
126 | putc (',', FILE); \ | |
127 | fprintf (FILE, TYPE_OPERAND_FMT, "function"); \ | |
128 | putc ('\n', FILE); \ | |
129 | ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \ | |
130 | ASM_OUTPUT_LABEL (FILE, NAME); \ | |
131 | } \ | |
132 | while (0) | |
133 | ||
134 | /* Write the extra assembler code needed to declare an object properly. */ | |
135 | #undef ASM_DECLARE_OBJECT_NAME | |
136 | #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \ | |
137 | do \ | |
138 | { \ | |
139 | if (mcore_dllexport_name_p (NAME)) \ | |
140 | { \ | |
141 | enum in_section save_section = in_section; \ | |
142 | MCORE_EXPORT_NAME (FILE, NAME); \ | |
143 | switch_to_section (save_section, (DECL)); \ | |
144 | } \ | |
145 | fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \ | |
146 | assemble_name (FILE, NAME); \ | |
147 | putc (',', FILE); \ | |
148 | fprintf (FILE, TYPE_OPERAND_FMT, "object"); \ | |
149 | putc ('\n', FILE); \ | |
150 | size_directive_output = 0; \ | |
151 | if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \ | |
152 | { \ | |
153 | size_directive_output = 1; \ | |
154 | fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \ | |
155 | assemble_name (FILE, NAME); \ | |
156 | fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \ | |
157 | } \ | |
158 | ASM_OUTPUT_LABEL(FILE, NAME); \ | |
159 | } \ | |
160 | while (0) | |
161 | ||
162 | /* Output the size directive for a decl in rest_of_decl_compilation | |
163 | in the case where we did not do so before the initializer. | |
164 | Once we find the error_mark_node, we know that the value of | |
165 | size_directive_output was set | |
166 | by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */ | |
167 | #undef ASM_FINISH_DECLARE_OBJECT | |
168 | #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \ | |
169 | do \ | |
170 | { \ | |
171 | char * name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \ | |
172 | if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \ | |
173 | && ! AT_END && TOP_LEVEL \ | |
174 | && DECL_INITIAL (DECL) == error_mark_node \ | |
175 | && !size_directive_output) \ | |
176 | { \ | |
177 | fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \ | |
178 | assemble_name (FILE, name); \ | |
179 | fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL)));\ | |
180 | } \ | |
181 | } \ | |
182 | while (0) | |
183 | ||
184 | ||
185 | #undef STARTFILE_SPEC | |
186 | #define STARTFILE_SPEC "crt0.o%s crti.o%s crtbegin.o%s" | |
187 | ||
188 | /* Include the OS stub library, so that the code can be simulated. | |
189 | This is not the right way to do this. Ideally this kind of thing | |
190 | should be done in the linker script - but I have not worked out how | |
191 | to specify the location of a linker script in a gcc command line yet. */ | |
192 | #undef ENDFILE_SPEC | |
193 | #define ENDFILE_SPEC "%{!mno-lsim:-lsim} crtend.o%s crtn.o%s" | |
194 | ||
195 | ||
196 | /* The subroutine calls in the .init and .fini sections create literal | |
197 | pools which must be jumped around... */ | |
198 | #define FORCE_INIT_SECTION_ALIGN asm ("br 1f ; .literals ; 1:") | |
199 | #define FORCE_FINI_SECTION_ALIGN asm ("br 1f ; .literals ; 1:") | |
200 | ||
201 | #undef CTORS_SECTION_ASM_OP | |
202 | #define CTORS_SECTION_ASM_OP ".section\t.ctors,\"aw\"" | |
203 | #undef DTORS_SECTION_ASM_OP | |
204 | #define DTORS_SECTION_ASM_OP ".section\t.dtors,\"aw\"" | |
205 | ||
206 | #endif /* __MCORE_ELF_H__ */ |