1 /* Definitions of target machine for GNU compiler, for Advanced RISC Machines
2 ARM compilation, AOF Assembler.
3 Copyright (C) 1995, 1996, 1997, 2000 Free Software Foundation, Inc.
4 Contributed by Richard Earnshaw (rearnsha@armltd.co.uk)
6 This file is part of GNU CC.
8 GNU CC 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)
13 GNU CC 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.
18 You should have received a copy of the GNU General Public License
19 along with GNU CC; see the file COPYING. If not, write to
20 the Free Software Foundation, 59 Temple Place - Suite 330,
21 Boston, MA 02111-1307, USA. */
27 #define LINK_LIBGCC_SPECIAL 1
29 #define LINK_SPEC "%{aof} %{bin} %{aif} %{ihf} %{shl,*} %{reent*} %{split} \
30 %{ov*,*} %{reloc*} -nodebug"
32 #define STARTFILE_SPEC "crtbegin.o%s"
34 #define ENDFILE_SPEC "crtend.o%s"
37 #define ASM_SPEC "%{g -g} -arch 4 \
38 -apcs 3%{mapcs-32:/32bit}%{mapcs-26:/26bit}%{!mapcs-26:%{!macps-32:/26bit}}"
42 #define LIB_SPEC "%{Eb: armlib_h.32b%s}%{!Eb: armlib_h.32l%s}"
45 #define LIBGCC_SPEC "libgcc.a%s"
47 /* Dividing the Output into Sections (Text, Data, ...) */
48 /* AOF Assembler syntax is a nightmare when it comes to areas, since once
49 we change from one area to another, we can't go back again. Instead,
50 we must create a new area with the same attributes and add the new output
51 to that. Unfortunately, there is nothing we can do here to guarantee that
52 two areas with the same attributes will be linked adjacently in the
53 resulting executable, so we have to be careful not to do pc-relative
54 addressing across such boundaries. */
55 #define TEXT_SECTION_ASM_OP aof_text_section ()
57 #define SELECT_RTX_SECTION(MODE,RTX,ALIGN) text_section ();
59 #define DATA_SECTION_ASM_OP aof_data_section ()
61 #define EXTRA_SECTIONS in_zero_init, in_common
63 #define EXTRA_SECTION_FUNCTIONS \
67 #define ZERO_INIT_SECTION \
69 zero_init_section () \
71 static int zero_init_count = 1; \
72 if (in_section != in_zero_init) \
74 fprintf (asm_out_file, "\tAREA |C$$zidata%d|,NOINIT\n", \
76 in_section = in_zero_init; \
80 /* Used by ASM_OUTPUT_COMMON (below) to tell varasm.c that we've
82 #define COMMON_SECTION \
86 if (in_section != in_common) \
88 in_section = in_common; \
91 #define CTOR_LIST_BEGIN \
92 asm (CTORS_SECTION_ASM_OP); \
93 extern func_ptr __CTOR_END__[1]; \
94 func_ptr __CTOR_LIST__[1] = {__CTOR_END__};
96 #define CTOR_LIST_END \
97 asm (CTORS_SECTION_ASM_OP); \
98 func_ptr __CTOR_END__[1] = { (func_ptr) 0 };
100 #define DO_GLOBAL_CTORS_BODY \
102 func_ptr *ptr = __CTOR_LIST__ + 1; \
107 #define DTOR_LIST_BEGIN \
108 asm (DTORS_SECTION_ASM_OP); \
109 extern func_ptr __DTOR_END__[1]; \
110 func_ptr __DTOR_LIST__[1] = {__DTOR_END__};
112 #define DTOR_LIST_END \
113 asm (DTORS_SECTION_ASM_OP); \
114 func_ptr __DTOR_END__[1] = { (func_ptr) 0 };
116 #define DO_GLOBAL_DTORS_BODY \
118 func_ptr *ptr = __DTOR_LIST__ + 1; \
123 #define JUMP_TABLES_IN_TEXT_SECTION 1
126 #define ARM_OS_NAME "(generic)"
129 /* For the AOF linker, we need to reference __main to force the standard
130 library to get linked in. */
132 #define ASM_FILE_START(STREAM) \
134 fprintf ((STREAM), "%s Generated by gcc %s for ARM/%s\n", \
135 ASM_COMMENT_START, version_string, ARM_OS_NAME); \
136 fprintf ((STREAM), "__r0\tRN\t0\n"); \
137 fprintf ((STREAM), "__a1\tRN\t0\n"); \
138 fprintf ((STREAM), "__a2\tRN\t1\n"); \
139 fprintf ((STREAM), "__a3\tRN\t2\n"); \
140 fprintf ((STREAM), "__a4\tRN\t3\n"); \
141 fprintf ((STREAM), "__v1\tRN\t4\n"); \
142 fprintf ((STREAM), "__v2\tRN\t5\n"); \
143 fprintf ((STREAM), "__v3\tRN\t6\n"); \
144 fprintf ((STREAM), "__v4\tRN\t7\n"); \
145 fprintf ((STREAM), "__v5\tRN\t8\n"); \
146 fprintf ((STREAM), "__v6\tRN\t9\n"); \
147 fprintf ((STREAM), "__sl\tRN\t10\n"); \
148 fprintf ((STREAM), "__fp\tRN\t11\n"); \
149 fprintf ((STREAM), "__ip\tRN\t12\n"); \
150 fprintf ((STREAM), "__sp\tRN\t13\n"); \
151 fprintf ((STREAM), "__lr\tRN\t14\n"); \
152 fprintf ((STREAM), "__pc\tRN\t15\n"); \
153 fprintf ((STREAM), "__f0\tFN\t0\n"); \
154 fprintf ((STREAM), "__f1\tFN\t1\n"); \
155 fprintf ((STREAM), "__f2\tFN\t2\n"); \
156 fprintf ((STREAM), "__f3\tFN\t3\n"); \
157 fprintf ((STREAM), "__f4\tFN\t4\n"); \
158 fprintf ((STREAM), "__f5\tFN\t5\n"); \
159 fprintf ((STREAM), "__f6\tFN\t6\n"); \
160 fprintf ((STREAM), "__f7\tFN\t7\n"); \
164 /* Some systems use __main in a way incompatible with its use in gcc, in these
165 cases use the macros NAME__MAIN to give a quoted symbol and SYMBOL__MAIN to
166 give the same symbol without quotes for an alternative entry point. You
167 must define both, or neither. */
168 #define NAME__MAIN "__gccmain"
169 #define SYMBOL__MAIN __gccmain
171 #define ASM_FILE_END(STREAM) \
175 aof_dump_pic_table (STREAM); \
176 aof_dump_imports (STREAM); \
177 fputs ("\tEND\n", (STREAM)); \
180 #define ASM_COMMENT_START ";"
182 #define ASM_APP_ON ""
184 #define ASM_APP_OFF ""
186 #define ASM_OUTPUT_ASCII(STREAM,PTR,LEN) \
189 const char *ptr = (PTR); \
190 fprintf ((STREAM), "\tDCB"); \
191 for (i = 0; i < (long)(LEN); i++) \
192 fprintf ((STREAM), " &%02x%s", \
193 (unsigned ) *(ptr++), \
194 (i + 1 < (long)(LEN) \
195 ? ((i & 3) == 3 ? "\n\tDCB" : ",") \
199 #define IS_ASM_LOGICAL_LINE_SEPARATOR(C) ((C) == '\n')
201 /* Output of Uninitialized Variables */
203 #define ASM_OUTPUT_COMMON(STREAM,NAME,SIZE,ROUNDED) \
204 (common_section (), \
205 fprintf ((STREAM), "\tAREA "), \
206 assemble_name ((STREAM), (NAME)), \
207 fprintf ((STREAM), ", DATA, COMMON\n\t%% %d\t%s size=%d\n", \
208 (ROUNDED), ASM_COMMENT_START, SIZE))
210 #define ASM_OUTPUT_LOCAL(STREAM,NAME,SIZE,ROUNDED) \
211 (zero_init_section (), \
212 assemble_name ((STREAM), (NAME)), \
213 fprintf ((STREAM), "\n"), \
214 fprintf ((STREAM), "\t%% %d\t%s size=%d\n", \
215 (ROUNDED), ASM_COMMENT_START, SIZE))
217 /* Output and Generation of Labels */
219 extern int arm_main_function
;
221 #define ASM_GLOBALIZE_LABEL(STREAM,NAME) \
223 fprintf ((STREAM), "\tEXPORT\t"); \
224 assemble_name ((STREAM), (NAME)); \
225 fputc ('\n', (STREAM)); \
226 if ((NAME)[0] == 'm' && ! strcmp ((NAME), "main")) \
227 arm_main_function = 1; \
230 #define ASM_OUTPUT_LABEL(STREAM,NAME) \
232 assemble_name (STREAM,NAME); \
233 fputs ("\n", STREAM); \
236 #define ASM_DECLARE_FUNCTION_NAME(STREAM,NAME,DECL) \
238 if (TARGET_POKE_FUNCTION_NAME) \
239 arm_poke_function_name ((STREAM), (NAME)); \
240 ASM_OUTPUT_LABEL (STREAM, NAME); \
241 if (! TREE_PUBLIC (DECL)) \
243 fputs ("\tKEEP ", STREAM); \
244 ASM_OUTPUT_LABEL (STREAM, NAME); \
246 aof_delete_import ((NAME)); \
249 #define ASM_DECLARE_OBJECT_NAME(STREAM,NAME,DECL) \
251 ASM_OUTPUT_LABEL (STREAM, NAME); \
252 if (! TREE_PUBLIC (DECL)) \
254 fputs ("\tKEEP ", STREAM); \
255 ASM_OUTPUT_LABEL (STREAM, NAME); \
257 aof_delete_import ((NAME)); \
260 #define ASM_OUTPUT_EXTERNAL(STREAM,DECL,NAME) \
261 aof_add_import ((NAME))
263 #define ASM_OUTPUT_EXTERNAL_LIBCALL(STREAM,SYMREF) \
264 (fprintf ((STREAM), "\tIMPORT\t"), \
265 assemble_name ((STREAM), XSTR ((SYMREF), 0)), \
266 fputc ('\n', (STREAM)))
268 #define ASM_OUTPUT_LABELREF(STREAM,NAME) \
269 fprintf ((STREAM), "|%s|", NAME)
271 #define ASM_GENERATE_INTERNAL_LABEL(STRING,PREFIX,NUM) \
272 sprintf ((STRING), "*|%s..%ld|", (PREFIX), (long)(NUM))
274 #define ASM_FORMAT_PRIVATE_NAME(OUTVAR,NAME,NUMBER) \
275 ((OUTVAR) = (char *) alloca (strlen ((NAME)) + 10), \
276 sprintf ((OUTVAR), "%s.%d", (NAME), (NUMBER)))
278 /* How initialization functions are handled */
280 #define CTORS_SECTION_ASM_OP "\tAREA\t|C$$gnu_ctorsvec|, DATA, READONLY"
281 #define DTORS_SECTION_ASM_OP "\tAREA\t|C$$gnu_dtorsvec|, DATA, READONLY"
283 /* Output of Assembler Instructions */
285 #define REGISTER_NAMES \
287 "a1", "a2", "a3", "a4", \
288 "v1", "v2", "v3", "v4", \
289 "v5", "v6", "sl", "fp", \
290 "ip", "sp", "lr", "pc", \
291 "f0", "f1", "f2", "f3", \
292 "f4", "f5", "f6", "f7", \
296 #define ADDITIONAL_REGISTER_NAMES \
298 {"r0", 0}, {"a1", 0}, \
299 {"r1", 1}, {"a2", 1}, \
300 {"r2", 2}, {"a3", 2}, \
301 {"r3", 3}, {"a4", 3}, \
302 {"r4", 4}, {"v1", 4}, \
303 {"r5", 5}, {"v2", 5}, \
304 {"r6", 6}, {"v3", 6}, \
305 {"r7", 7}, {"wr", 7}, \
306 {"r8", 8}, {"v5", 8}, \
307 {"r9", 9}, {"v6", 9}, \
308 {"r10", 10}, {"sl", 10}, {"v7", 10}, \
309 {"r11", 11}, {"fp", 11}, \
310 {"r12", 12}, {"ip", 12}, \
311 {"r13", 13}, {"sp", 13}, \
312 {"r14", 14}, {"lr", 14}, \
313 {"r15", 15}, {"pc", 15} \
316 #define REGISTER_PREFIX "__"
317 #define USER_LABEL_PREFIX ""
318 #define LOCAL_LABEL_PREFIX ""
320 /* AOF does not prefix user function names with an underscore. */
321 #define ARM_MCOUNT_NAME "_mcount"
323 /* Output of Dispatch Tables */
325 #define ASM_OUTPUT_ADDR_DIFF_ELT(STREAM,BODY,VALUE,REL) \
326 fprintf ((STREAM), "\tb\t|L..%d|\n", (VALUE))
328 #define ASM_OUTPUT_ADDR_VEC_ELT(STREAM,VALUE) \
329 fprintf ((STREAM), "\tDCD\t|L..%d|\n", (VALUE))
331 /* A label marking the start of a jump table is a data label. */
332 #define ASM_OUTPUT_CASE_LABEL(STREAM,PREFIX,NUM,TABLE) \
333 fprintf ((STREAM), "\tALIGN\n|%s..%d|\n", (PREFIX), (NUM))
335 /* Assembler Commands for Alignment */
337 #define ASM_OUTPUT_SKIP(STREAM,NBYTES) \
338 fprintf ((STREAM), "\t%%\t%d\n", (NBYTES))
340 #define ASM_OUTPUT_ALIGN(STREAM,POWER) \
342 register int amount = 1 << (POWER); \
344 fprintf ((STREAM), "\tALIGN 2\n"); \
345 else if (amount == 4) \
346 fprintf ((STREAM), "\tALIGN\n"); \
348 fprintf ((STREAM), "\tALIGN %d\n", amount); \
351 #undef DBX_DEBUGGING_INFO