1 /* Operating system specific defines to be used when targeting GCC for 2 generic System V Release 3 system. 3 Copyright (C) 1991, 1996, 2000, 2002 Free Software Foundation, Inc. 4 Contributed by Ron Guilmette (rfg@monkeys.com). 5 6 This file is part of GCC. 7 8 GCC 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) 11 any later version. 12 13 GCC 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. 17 18 You should have received a copy of the GNU General Public License 19 along with GCC; see the file COPYING. If not, write to 20 the Free Software Foundation, 59 Temple Place - Suite 330, 21 Boston, MA 02111-1307, USA. */ 22 23 /* Define a symbol indicating that we are using svr3.h. */ 24 #define USING_SVR3_H 25 26 /* Define a symbol so that libgcc* can know what sort of operating 27 environment and assembler syntax we are targeting for. */ 28 #define SVR3_target 29 30 /* Assembler, linker, library, and startfile spec's. */ 31 32 /* The .file command should always begin the output. */ 33 #define TARGET_ASM_FILE_START_FILE_DIRECTIVE true 34 35 /* This says how to output an assembler line 36 to define a global common symbol. */ 37 /* We don't use ROUNDED because the standard compiler doesn't, 38 and the linker gives error messages if a common symbol 39 has more than one length value. */ 40 41 #undef ASM_OUTPUT_COMMON 42 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ 43 ( fputs (".comm ", (FILE)), \ 44 assemble_name ((FILE), (NAME)), \ 45 fprintf ((FILE), ",%lu\n", (unsigned long)(SIZE))) 46 47 /* This says how to output an assembler line 48 to define a local common symbol. */ 49 50 /* Note that using bss_section here caused errors 51 in building shared libraries on system V.3. */ 52 #undef ASM_OUTPUT_LOCAL 53 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ 54 do { \ 55 int align = exact_log2 (ROUNDED); \ 56 if (align > 2) align = 2; \ 57 data_section (); \ 58 ASM_OUTPUT_ALIGN ((FILE), align == -1 ? 2 : align); \ 59 ASM_OUTPUT_LABEL ((FILE), (NAME)); \ 60 fprintf ((FILE), "\t.set .,.+%u\n", (int)(ROUNDED)); \ 61 } while (0) 62 63 /* Output #ident as a .ident. */ 64 65 #undef ASM_OUTPUT_IDENT 66 #define ASM_OUTPUT_IDENT(FILE, NAME) \ 67 fprintf (FILE, "\t.ident \"%s\"\n", NAME); 68 69 /* Use periods rather than dollar signs in special g++ assembler names. */ 70 71 #define NO_DOLLAR_IN_LABEL 72 73 /* Implicit library calls should use memcpy, not bcopy, etc. */ 74 75 #define TARGET_MEM_FUNCTIONS 76 77 /* System V Release 3 uses COFF debugging info. */ 78 79 #define SDB_DEBUGGING_INFO 1 80 81 /* We don't want to output DBX debugging information. */ 82 83 #undef DBX_DEBUGGING_INFO 84 85 /* Define the actual types of some ANSI-mandated types. These 86 definitions should work for most SVR3 systems. */ 87 88 #undef SIZE_TYPE 89 #define SIZE_TYPE "unsigned int" 90 91 #undef PTRDIFF_TYPE 92 #define PTRDIFF_TYPE "int" 93 94 #undef WCHAR_TYPE 95 #define WCHAR_TYPE "long int" 96 97 #undef WCHAR_TYPE_SIZE 98 #define WCHAR_TYPE_SIZE BITS_PER_WORD 99 100 /* The prefix to add to user-visible assembler symbols. 101 102 For System V Release 3 the convention is to prepend a leading 103 underscore onto user-level symbol names. */ 104 105 #undef USER_LABEL_PREFIX 106 #define USER_LABEL_PREFIX "_" 107 108 /* This is how to store into the string LABEL 109 the symbol_ref name of an internal numbered label where 110 PREFIX is the class of label and NUM is the number within the class. 111 This is suitable for output with `assemble_name'. 112 113 For most svr3 systems, the convention is that any symbol which begins 114 with a period is not put into the linker symbol table by the assembler. */ 115 116 #undef ASM_GENERATE_INTERNAL_LABEL 117 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ 118 sprintf (LABEL, "*%s%s%ld", LOCAL_LABEL_PREFIX, PREFIX, (long)(NUM)) 119 120 /* We want local labels to start with period if made with asm_fprintf. */ 121 #undef LOCAL_LABEL_PREFIX 122 #define LOCAL_LABEL_PREFIX "." 123 124 /* Support const sections and the ctors and dtors sections for g++. */ 125 126 /* Define a few machine-specific details of the implementation of 127 constructors. 128 129 The __CTORS_LIST__ goes in the .init section. Define CTOR_LIST_BEGIN 130 and CTOR_LIST_END to contribute to the .init section an instruction to 131 push a word containing 0 (or some equivalent of that). 132 133 Define TARGET_ASM_CONSTRUCTOR to push the address of the constructor. */ 134 135 #define INIT_SECTION_ASM_OP "\t.section\t.init" 136 #define FINI_SECTION_ASM_OP "\t.section .fini,\"x\"" 137 #define DTORS_SECTION_ASM_OP FINI_SECTION_ASM_OP 138 139 /* CTOR_LIST_BEGIN and CTOR_LIST_END are machine-dependent 140 because they push on the stack. */ 141 142 #ifndef STACK_GROWS_DOWNWARD 143 144 /* Constructor list on stack is in reverse order. Go to the end of the 145 list and go backwards to call constructors in the right order. */ 146 #define DO_GLOBAL_CTORS_BODY \ 147 do { \ 148 func_ptr *p, *beg = alloca (0); \ 149 for (p = beg; *p; p++) \ 150 ; \ 151 while (p != beg) \ 152 (*--p) (); \ 153 } while (0) 154 155 #else 156 157 /* Constructor list on stack is in correct order. Just call them. */ 158 #define DO_GLOBAL_CTORS_BODY \ 159 do { \ 160 func_ptr *p, *beg = alloca (0); \ 161 for (p = beg; *p; ) \ 162 (*p++) (); \ 163 } while (0) 164 165 #endif /* STACK_GROWS_DOWNWARD */ 166 167 #undef EXTRA_SECTIONS 168 #define EXTRA_SECTIONS in_init, in_fini 169 170 #undef EXTRA_SECTION_FUNCTIONS 171 #define EXTRA_SECTION_FUNCTIONS \ 172 INIT_SECTION_FUNCTION \ 173 FINI_SECTION_FUNCTION 174 175 #define INIT_SECTION_FUNCTION \ 176 void \ 177 init_section () \ 178 { \ 179 if (in_section != in_init) \ 180 { \ 181 fprintf (asm_out_file, "%s\n", INIT_SECTION_ASM_OP); \ 182 in_section = in_init; \ 183 } \ 184 } 185 186 #define FINI_SECTION_FUNCTION \ 187 void \ 188 fini_section () \ 189 { \ 190 if (in_section != in_fini) \ 191 { \ 192 fprintf (asm_out_file, "%s\n", FINI_SECTION_ASM_OP); \ 193 in_section = in_fini; \ 194 } \ 195 } 196