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, 2004 Free Software Foundation, Inc. 4 Contributed by Ron Guilmette (rfg@monkeys.com). 5 6This file is part of GCC. 7 8GCC is free software; you can redistribute it and/or modify 9it under the terms of the GNU General Public License as published by 10the Free Software Foundation; either version 2, or (at your option) 11any later version. 12 13GCC is distributed in the hope that it will be useful, 14but WITHOUT ANY WARRANTY; without even the implied warranty of 15MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16GNU General Public License for more details. 17 18You should have received a copy of the GNU General Public License 19along with GCC; see the file COPYING. If not, write to 20the Free Software Foundation, 51 Franklin Street, Fifth Floor, 21Boston, MA 02110-1301, 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 switch_to_section (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/* System V Release 3 uses COFF debugging info. */ 74 75#define SDB_DEBUGGING_INFO 1 76 77/* We don't want to output DBX debugging information. */ 78 79#undef DBX_DEBUGGING_INFO 80 81/* Define the actual types of some ANSI-mandated types. These 82 definitions should work for most SVR3 systems. */ 83 84#undef SIZE_TYPE 85#define SIZE_TYPE "unsigned int" 86 87#undef PTRDIFF_TYPE 88#define PTRDIFF_TYPE "int" 89 90#undef WCHAR_TYPE 91#define WCHAR_TYPE "long int" 92 93#undef WCHAR_TYPE_SIZE 94#define WCHAR_TYPE_SIZE BITS_PER_WORD 95 96/* The prefix to add to user-visible assembler symbols. 97 98 For System V Release 3 the convention is to prepend a leading 99 underscore onto user-level symbol names. */ 100 101#undef USER_LABEL_PREFIX 102#define USER_LABEL_PREFIX "_" 103 104/* This is how to store into the string LABEL 105 the symbol_ref name of an internal numbered label where 106 PREFIX is the class of label and NUM is the number within the class. 107 This is suitable for output with `assemble_name'. 108 109 For most svr3 systems, the convention is that any symbol which begins 110 with a period is not put into the linker symbol table by the assembler. */ 111 112#undef ASM_GENERATE_INTERNAL_LABEL 113#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ 114 sprintf (LABEL, "*%s%s%ld", LOCAL_LABEL_PREFIX, PREFIX, (long)(NUM)) 115 116/* We want local labels to start with period if made with asm_fprintf. */ 117#undef LOCAL_LABEL_PREFIX 118#define LOCAL_LABEL_PREFIX "." 119 120/* Support const sections and the ctors and dtors sections for g++. */ 121 122/* Define a few machine-specific details of the implementation of 123 constructors. 124 125 The __CTORS_LIST__ goes in the .init section. Define CTOR_LIST_BEGIN 126 and CTOR_LIST_END to contribute to the .init section an instruction to 127 push a word containing 0 (or some equivalent of that). 128 129 Define TARGET_ASM_CONSTRUCTOR to push the address of the constructor. */ 130 131#define INIT_SECTION_ASM_OP "\t.section\t.init" 132#define FINI_SECTION_ASM_OP "\t.section .fini,\"x\"" 133#define DTORS_SECTION_ASM_OP FINI_SECTION_ASM_OP 134 135/* CTOR_LIST_BEGIN and CTOR_LIST_END are machine-dependent 136 because they push on the stack. */ 137 138#ifndef STACK_GROWS_DOWNWARD 139 140/* Constructor list on stack is in reverse order. Go to the end of the 141 list and go backwards to call constructors in the right order. */ 142#define DO_GLOBAL_CTORS_BODY \ 143do { \ 144 func_ptr *p, *beg = alloca (0); \ 145 for (p = beg; *p; p++) \ 146 ; \ 147 while (p != beg) \ 148 (*--p) (); \ 149} while (0) 150 151#else 152 153/* Constructor list on stack is in correct order. Just call them. */ 154#define DO_GLOBAL_CTORS_BODY \ 155do { \ 156 func_ptr *p, *beg = alloca (0); \ 157 for (p = beg; *p; ) \ 158 (*p++) (); \ 159} while (0) 160 161#endif /* STACK_GROWS_DOWNWARD */ 162