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gcc.gnu.org Git - gcc.git/blob - gcc/defaults.h
1 /* Definitions of various defaults for how to do assembler output
2 (most of which are designed to be appropriate for GAS or for
4 Copyright (C) 1992, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
5 Contributed by Ron Guilmette (rfg@monkeys.com)
7 This file is part of GNU CC.
9 GNU CC is free software; you can redistribute it and/or modify
10 it under the terms of the GNU General Public License as published by
11 the Free Software Foundation; either version 2, or (at your option)
14 GNU CC is distributed in the hope that it will be useful,
15 but WITHOUT ANY WARRANTY; without even the implied warranty of
16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 GNU General Public License for more details.
19 You should have received a copy of the GNU General Public License
20 along with GNU CC; see the file COPYING. If not, write to
21 the Free Software Foundation, 59 Temple Place - Suite 330,
22 Boston, MA 02111-1307, USA. */
24 /* Store in OUTPUT a string (made with alloca) containing
25 an assembler-name for a local static variable or function named NAME.
26 LABELNO is an integer which is different for each call. */
28 #ifndef ASM_FORMAT_PRIVATE_NAME
29 #define ASM_FORMAT_PRIVATE_NAME(OUTPUT, NAME, LABELNO) \
31 int len = strlen (NAME); \
32 char *temp = (char *) alloca (len + 3); \
34 strcpy (&temp[1], (NAME)); \
35 temp[len + 1] = '.'; \
37 (OUTPUT) = (char *) alloca (strlen (NAME) + 11); \
38 ASM_GENERATE_INTERNAL_LABEL (OUTPUT, temp, LABELNO); \
43 #define ASM_STABD_OP ".stabd"
46 /* This is how to output an element of a case-vector that is absolute.
47 Some targets don't use this, but we have to define it anyway. */
49 #ifndef ASM_OUTPUT_ADDR_VEC_ELT
50 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
51 do { fprintf (FILE, "\t%s\t", ASM_LONG); \
52 ASM_OUTPUT_INTERNAL_LABEL (FILE, "L", (VALUE)); \
57 /* Provide default for ASM_OUTPUT_ALTERNATE_LABEL_NAME. */
58 #ifndef ASM_OUTPUT_ALTERNATE_LABEL_NAME
59 #define ASM_OUTPUT_ALTERNATE_LABEL_NAME(FILE,INSN) \
60 do { ASM_OUTPUT_LABEL(FILE,LABEL_ALTERNATE_NAME (INSN)); } while (0)
63 /* choose a reasonable default for ASM_OUTPUT_ASCII. */
65 #ifndef ASM_OUTPUT_ASCII
66 #define ASM_OUTPUT_ASCII(MYFILE, MYSTRING, MYLENGTH) \
68 FILE *_hide_asm_out_file = (MYFILE); \
69 const unsigned char *_hide_p = (const unsigned char *) (MYSTRING); \
70 int _hide_thissize = (MYLENGTH); \
72 FILE *asm_out_file = _hide_asm_out_file; \
73 const unsigned char *p = _hide_p; \
74 int thissize = _hide_thissize; \
76 fprintf (asm_out_file, "\t.ascii \""); \
78 for (i = 0; i < thissize; i++) \
80 register int c = p[i]; \
81 if (c == '\"' || c == '\\') \
82 putc ('\\', asm_out_file); \
84 putc (c, asm_out_file); \
87 fprintf (asm_out_file, "\\%o", c); \
88 /* After an octal-escape, if a digit follows, \
89 terminate one string constant and start another. \
90 The Vax assembler fails to stop reading the escape \
91 after three digits, so this is the only way we \
92 can get it to parse the data properly. */ \
93 if (i < thissize - 1 && ISDIGIT(p[i + 1])) \
94 fprintf (asm_out_file, "\"\n\t.ascii \""); \
97 fprintf (asm_out_file, "\"\n"); \
103 #ifndef ASM_IDENTIFY_GCC
104 /* Default the definition, only if ASM_IDENTIFY_GCC is not set,
105 because if it is set, we might not want ASM_IDENTIFY_LANGUAGE
106 outputting labels, if we do want it to, then it must be defined
108 #ifndef ASM_IDENTIFY_LANGUAGE
109 #define ASM_IDENTIFY_LANGUAGE(FILE) output_lang_identify (FILE);
113 /* This is how we tell the assembler to equate two values. */
115 #ifndef ASM_OUTPUT_DEF
116 #define ASM_OUTPUT_DEF(FILE,LABEL1,LABEL2) \
117 do { fprintf ((FILE), "\t%s\t", SET_ASM_OP); \
118 assemble_name (FILE, LABEL1); \
119 fprintf (FILE, ","); \
120 assemble_name (FILE, LABEL2); \
121 fprintf (FILE, "\n"); \
126 /* This is how to output a reference to a user-level label named NAME. */
128 #ifndef ASM_OUTPUT_LABELREF
129 #define ASM_OUTPUT_LABELREF(FILE,NAME) asm_fprintf ((FILE), "%U%s", (NAME))
132 /* This determines whether or not we support weak symbols. */
133 #ifndef SUPPORTS_WEAK
134 #ifdef ASM_WEAKEN_LABEL
135 #define SUPPORTS_WEAK 1
137 #define SUPPORTS_WEAK 0
141 /* If the target supports weak symbols, define TARGET_ATTRIBUTE_WEAK to
142 provide a weak attribute. Else define it to nothing.
144 This would normally belong in gansidecl.h, but SUPPORTS_WEAK is
145 not available at that time.
147 Note, this is only for use by target files which we know are to be
149 #ifndef TARGET_ATTRIBUTE_WEAK
151 # define TARGET_ATTRIBUTE_WEAK __attribute__ ((weak))
153 # define TARGET_ATTRIBUTE_WEAK
157 /* If we have a definition of INCOMING_RETURN_ADDR_RTX, assume that
158 the rest of the DWARF 2 frame unwind support is also provided. */
159 #if !defined (DWARF2_UNWIND_INFO) && defined (INCOMING_RETURN_ADDR_RTX)
160 #define DWARF2_UNWIND_INFO 1
163 #if defined (DWARF2_UNWIND_INFO) && !defined (EH_FRAME_SECTION)
164 # if defined (EH_FRAME_SECTION_ASM_OP)
165 # define EH_FRAME_SECTION() eh_frame_section();
167 /* If we aren't using crtstuff to run ctors, don't use it for EH. */
168 # if defined (ASM_OUTPUT_SECTION_NAME) && defined (ASM_OUTPUT_CONSTRUCTOR)
169 # define EH_FRAME_SECTION_ASM_OP ".section\t.eh_frame,\"aw\""
170 # define EH_FRAME_SECTION() \
171 do { named_section (NULL_TREE, ".eh_frame", 0); } while (0)
176 /* By default, we generate a label at the beginning and end of the
177 text section, and compute the size of the text section by
178 subtracting the two. However, on some platforms that doesn't
179 work, and we use the section itself, rather than a label at the
180 beginning of it, to indicate the start of the section. On such
181 platforms, define this to zero. */
182 #ifndef DWARF2_GENERATE_TEXT_SECTION_LABEL
183 #define DWARF2_GENERATE_TEXT_SECTION_LABEL 1
186 /* Supply a default definition for PROMOTE_PROTOTYPES. */
187 #ifndef PROMOTE_PROTOTYPES
188 #define PROMOTE_PROTOTYPES 0
191 /* Number of hardware registers that go into the DWARF-2 unwind info.
192 If not defined, equals FIRST_PSEUDO_REGISTER */
194 #ifndef DWARF_FRAME_REGISTERS
195 #define DWARF_FRAME_REGISTERS FIRST_PSEUDO_REGISTER
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