1 /* Definitions of target machine for GNU compiler.
2 For ARM with ELF obj format.
3 Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001
4 Free Software Foundation, Inc.
5 Contributed by Philip Blundell <philb@gnu.org> and
6 Catherine Moore <clm@cygnus.com>
8 This file is part of GNU CC.
10 GNU CC is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2, or (at your option)
15 GNU CC is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with GNU CC; see the file COPYING. If not, write to
22 the Free Software Foundation, 59 Temple Place - Suite 330,
23 Boston, MA 02111-1307, USA. */
26 #define OBJECT_FORMAT_ELF
28 #ifndef LOCAL_LABEL_PREFIX
29 #define LOCAL_LABEL_PREFIX "."
32 #ifndef USER_LABEL_PREFIX
33 #define USER_LABEL_PREFIX ""
36 #ifndef SUBTARGET_CPP_SPEC
37 #define SUBTARGET_CPP_SPEC "-D__ELF__"
40 #ifndef SUBTARGET_EXTRA_SPECS
41 #define SUBTARGET_EXTRA_SPECS \
42 { "subtarget_extra_asm_spec", SUBTARGET_EXTRA_ASM_SPEC },
45 #ifndef SUBTARGET_EXTRA_ASM_SPEC
46 #define SUBTARGET_EXTRA_ASM_SPEC ""
54 %{mapcs-*:-mapcs-%*} \
55 %{mapcs-float:-mfloat} \
56 %{msoft-float:-mno-fpu} \
57 %{mthumb-interwork:-mthumb-interwork} \
58 %(subtarget_extra_asm_spec)"
61 /* The following macro defines the format used to output the second
62 operand of the .type assembler directive. Different svr4 assemblers
63 expect various different forms for this operand. The one given here
64 is just a default. You may need to override it in your machine-
65 specific tm.h file (depending upon the particulars of your assembler). */
66 #define TYPE_OPERAND_FMT "%s"
68 /* Write the extra assembler code needed to declare a function's result.
69 Most svr4 assemblers don't require any special declaration of the
70 result value, but there are exceptions. */
71 #ifndef ASM_DECLARE_RESULT
72 #define ASM_DECLARE_RESULT(FILE, RESULT)
75 /* These macros generate the special .type and .size directives which
76 are used to set the corresponding fields of the linker symbol table
77 entries in an ELF object file under SVR4. These macros also output
78 the starting labels for the relevant functions/objects. */
79 #define TYPE_ASM_OP "\t.type\t"
80 #define SIZE_ASM_OP "\t.size\t"
82 /* Write the extra assembler code needed to declare a function properly.
83 Some svr4 assemblers need to also have something extra said about the
84 function's return value. We allow for that here. */
85 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \
88 ARM_DECLARE_FUNCTION_NAME (FILE, NAME, DECL); \
89 fprintf (FILE, "%s", TYPE_ASM_OP); \
90 assemble_name (FILE, NAME); \
92 fprintf (FILE, TYPE_OPERAND_FMT, "function"); \
94 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \
95 ASM_OUTPUT_LABEL(FILE, NAME); \
99 /* Write the extra assembler code needed to declare an object properly. */
100 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \
103 fprintf (FILE, "%s", TYPE_ASM_OP); \
104 assemble_name (FILE, NAME); \
106 fprintf (FILE, TYPE_OPERAND_FMT, "object"); \
108 size_directive_output = 0; \
109 if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \
111 size_directive_output = 1; \
112 fprintf (FILE, "%s", SIZE_ASM_OP); \
113 assemble_name (FILE, NAME); \
115 fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, \
116 int_size_in_bytes (TREE_TYPE (DECL))); \
117 fputc ('\n', FILE); \
119 ASM_OUTPUT_LABEL(FILE, NAME); \
123 /* Output the size directive for a decl in rest_of_decl_compilation
124 in the case where we did not do so before the initializer.
125 Once we find the error_mark_node, we know that the value of
126 size_directive_output was set
127 by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */
128 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \
131 const char * name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \
132 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \
133 && ! AT_END && TOP_LEVEL \
134 && DECL_INITIAL (DECL) == error_mark_node \
135 && !size_directive_output) \
137 size_directive_output = 1; \
138 fprintf (FILE, "%s", SIZE_ASM_OP); \
139 assemble_name (FILE, name); \
141 fprintf (FILE, HOST_WIDE_INT_PRINT_DEC, \
142 int_size_in_bytes (TREE_TYPE (DECL))); \
143 fputc ('\n', FILE); \
148 /* This is how to declare the size of a function. */
149 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \
152 ARM_DECLARE_FUNCTION_SIZE (FILE, FNAME, DECL); \
153 if (!flag_inhibit_size_directive) \
156 static int labelno; \
158 ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \
159 ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \
160 fprintf (FILE, "%s", SIZE_ASM_OP); \
161 assemble_name (FILE, (FNAME)); \
162 fprintf (FILE, ","); \
163 assemble_name (FILE, label); \
164 fprintf (FILE, "-"); \
165 assemble_name (FILE, (FNAME)); \
171 /* Define this macro if jump tables (for `tablejump' insns) should be
172 output in the text section, along with the assembler instructions.
173 Otherwise, the readonly data section is used. */
174 #define JUMP_TABLES_IN_TEXT_SECTION 1
177 #define LINK_SPEC "%{mbig-endian:-EB} -X"
180 /* Run-time Target Specification. */
181 #ifndef TARGET_VERSION
182 #define TARGET_VERSION fputs (" (ARM/elf)", stderr)
185 #ifndef TARGET_DEFAULT
186 #define TARGET_DEFAULT (ARM_FLAG_SOFT_FLOAT | ARM_FLAG_APCS_32 | ARM_FLAG_APCS_FRAME)
189 #ifndef MULTILIB_DEFAULTS
190 #define MULTILIB_DEFAULTS \
191 { "marm", "mlittle-endian", "msoft-float", "mapcs-32", "mno-thumb-interwork", "fno-leading-underscore" }
195 /* This outputs a lot of .req's to define alias for various registers.
196 Let's try to avoid this. */
197 #ifndef ASM_FILE_START
198 #define ASM_FILE_START(STREAM) \
201 fprintf (STREAM, "%s Generated by gcc %s for ARM/elf\n", \
202 ASM_COMMENT_START, version_string); \
203 output_file_directive (STREAM, main_input_filename); \
204 fprintf (STREAM, ASM_APP_OFF); \
209 /* Output an internal label definition. */
210 #ifndef ASM_OUTPUT_INTERNAL_LABEL
211 #define ASM_OUTPUT_INTERNAL_LABEL(STREAM, PREFIX, NUM) \
214 char * s = (char *) alloca (40 + strlen (PREFIX)); \
215 extern int arm_target_label, arm_ccfsm_state; \
216 extern rtx arm_target_insn; \
218 if (arm_ccfsm_state == 3 && arm_target_label == (NUM) \
219 && !strcmp (PREFIX, "L")) \
221 arm_ccfsm_state = 0; \
222 arm_target_insn = NULL; \
224 ASM_GENERATE_INTERNAL_LABEL (s, (PREFIX), (NUM)); \
225 ASM_OUTPUT_LABEL (STREAM, s); \
230 /* A list of other sections which the compiler might be "in" at any
232 #ifndef SUBTARGET_EXTRA_SECTIONS
233 #define SUBTARGET_EXTRA_SECTIONS
236 #ifndef EXTRA_SECTIONS
237 #define EXTRA_SECTIONS SUBTARGET_EXTRA_SECTIONS
240 /* A list of extra section function definitions. */
241 #ifndef SUBTARGET_EXTRA_SECTION_FUNCTIONS
242 #define SUBTARGET_EXTRA_SECTION_FUNCTIONS
245 #ifndef EXTRA_SECTION_FUNCTIONS
246 #define EXTRA_SECTION_FUNCTIONS \
247 SUBTARGET_EXTRA_SECTION_FUNCTIONS
250 /* Switch into a generic section. */
251 #undef TARGET_ASM_NAMED_SECTION
252 #define TARGET_ASM_NAMED_SECTION arm_elf_asm_named_section
254 /* Support the ctors/dtors sections for g++. */
256 #define INT_ASM_OP "\t.word\t"
259 /* This is how we tell the assembler that a symbol is weak. */
261 #define ASM_WEAKEN_LABEL(FILE, NAME) \
264 fputs ("\t.weak\t", FILE); \
265 assemble_name (FILE, NAME); \
266 fputc ('\n', FILE); \
270 #ifndef ASM_OUTPUT_ALIGNED_COMMON
271 #define ASM_OUTPUT_ALIGNED_COMMON(STREAM, NAME, SIZE, ALIGN) \
274 fprintf (STREAM, "\t.comm\t"); \
275 assemble_name (STREAM, NAME); \
276 fprintf (STREAM, ", %d, %d\n", SIZE, ALIGN); \
281 /* For PIC code we need to explicitly specify (PLT) and (GOT) relocs. */
282 #define NEED_PLT_RELOC flag_pic
283 #define NEED_GOT_RELOC flag_pic
285 /* The ELF assembler handles GOT addressing differently to NetBSD. */
288 /* Biggest alignment supported by the object file format of this
289 machine. Use this macro to limit the alignment which can be
290 specified using the `__attribute__ ((aligned (N)))' construct. If
291 not defined, the default value is `BIGGEST_ALIGNMENT'. */
292 #define MAX_OFILE_ALIGNMENT (32768 * 8)
294 /* Align output to a power of two. Note ".align 0" is redundant,
295 and also GAS will treat it as ".align 2" which we do not want. */
296 #define ASM_OUTPUT_ALIGN(STREAM, POWER) \
300 fprintf (STREAM, "\t.align\t%d\n", POWER); \