150397Sobrien/* Operating system specific defines to be used when targeting GCC for 250397Sobrien generic System V Release 3 system. 3169689Skan Copyright (C) 1991, 1996, 2000, 2002, 2004 Free Software Foundation, Inc. 450397Sobrien Contributed by Ron Guilmette (rfg@monkeys.com). 518334Speter 6132718SkanThis file is part of GCC. 718334Speter 8132718SkanGCC is free software; you can redistribute it and/or modify 918334Speterit under the terms of the GNU General Public License as published by 1018334Speterthe Free Software Foundation; either version 2, or (at your option) 1118334Speterany later version. 1218334Speter 13132718SkanGCC is distributed in the hope that it will be useful, 1418334Speterbut WITHOUT ANY WARRANTY; without even the implied warranty of 1518334SpeterMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1618334SpeterGNU General Public License for more details. 1718334Speter 1818334SpeterYou should have received a copy of the GNU General Public License 19132718Skanalong with GCC; see the file COPYING. If not, write to 20169689Skanthe Free Software Foundation, 51 Franklin Street, Fifth Floor, 21169689SkanBoston, MA 02110-1301, USA. */ 2218334Speter 2318334Speter/* Define a symbol indicating that we are using svr3.h. */ 2418334Speter#define USING_SVR3_H 2518334Speter 2618334Speter/* Define a symbol so that libgcc* can know what sort of operating 2718334Speter environment and assembler syntax we are targeting for. */ 2818334Speter#define SVR3_target 2918334Speter 30132718Skan/* Assembler, linker, library, and startfile spec's. */ 3118334Speter 3218334Speter/* The .file command should always begin the output. */ 33132718Skan#define TARGET_ASM_FILE_START_FILE_DIRECTIVE true 3418334Speter 3518334Speter/* This says how to output an assembler line 3618334Speter to define a global common symbol. */ 3718334Speter/* We don't use ROUNDED because the standard compiler doesn't, 3818334Speter and the linker gives error messages if a common symbol 3918334Speter has more than one length value. */ 4018334Speter 4118334Speter#undef ASM_OUTPUT_COMMON 4218334Speter#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ 4318334Speter( fputs (".comm ", (FILE)), \ 4418334Speter assemble_name ((FILE), (NAME)), \ 45132718Skan fprintf ((FILE), ",%lu\n", (unsigned long)(SIZE))) 4618334Speter 4718334Speter/* This says how to output an assembler line 4818334Speter to define a local common symbol. */ 4918334Speter 5018334Speter/* Note that using bss_section here caused errors 5118334Speter in building shared libraries on system V.3. */ 5218334Speter#undef ASM_OUTPUT_LOCAL 5318334Speter#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ 5418334Speter do { \ 5518334Speter int align = exact_log2 (ROUNDED); \ 5618334Speter if (align > 2) align = 2; \ 57169689Skan switch_to_section (data_section); \ 5818334Speter ASM_OUTPUT_ALIGN ((FILE), align == -1 ? 2 : align); \ 5918334Speter ASM_OUTPUT_LABEL ((FILE), (NAME)); \ 60132718Skan fprintf ((FILE), "\t.set .,.+%u\n", (int)(ROUNDED)); \ 6118334Speter } while (0) 6218334Speter 6318334Speter/* Output #ident as a .ident. */ 6418334Speter 6590075Sobrien#undef ASM_OUTPUT_IDENT 6618334Speter#define ASM_OUTPUT_IDENT(FILE, NAME) \ 6718334Speter fprintf (FILE, "\t.ident \"%s\"\n", NAME); 6818334Speter 6918334Speter/* Use periods rather than dollar signs in special g++ assembler names. */ 7018334Speter 7118334Speter#define NO_DOLLAR_IN_LABEL 7218334Speter 7318334Speter/* System V Release 3 uses COFF debugging info. */ 7418334Speter 75117395Skan#define SDB_DEBUGGING_INFO 1 7618334Speter 7718334Speter/* We don't want to output DBX debugging information. */ 7818334Speter 7918334Speter#undef DBX_DEBUGGING_INFO 8018334Speter 8118334Speter/* Define the actual types of some ANSI-mandated types. These 8218334Speter definitions should work for most SVR3 systems. */ 8318334Speter 8418334Speter#undef SIZE_TYPE 8518334Speter#define SIZE_TYPE "unsigned int" 8618334Speter 8718334Speter#undef PTRDIFF_TYPE 8818334Speter#define PTRDIFF_TYPE "int" 8918334Speter 9018334Speter#undef WCHAR_TYPE 9118334Speter#define WCHAR_TYPE "long int" 9218334Speter 9318334Speter#undef WCHAR_TYPE_SIZE 9418334Speter#define WCHAR_TYPE_SIZE BITS_PER_WORD 9518334Speter 9650397Sobrien/* The prefix to add to user-visible assembler symbols. 9718334Speter 9818334Speter For System V Release 3 the convention is to prepend a leading 9918334Speter underscore onto user-level symbol names. */ 10018334Speter 10150397Sobrien#undef USER_LABEL_PREFIX 10250397Sobrien#define USER_LABEL_PREFIX "_" 10318334Speter 10418334Speter/* This is how to store into the string LABEL 10518334Speter the symbol_ref name of an internal numbered label where 10618334Speter PREFIX is the class of label and NUM is the number within the class. 10718334Speter This is suitable for output with `assemble_name'. 10818334Speter 10918334Speter For most svr3 systems, the convention is that any symbol which begins 11018334Speter with a period is not put into the linker symbol table by the assembler. */ 11118334Speter 11218334Speter#undef ASM_GENERATE_INTERNAL_LABEL 11318334Speter#define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \ 11490075Sobrien sprintf (LABEL, "*%s%s%ld", LOCAL_LABEL_PREFIX, PREFIX, (long)(NUM)) 11518334Speter 11618334Speter/* We want local labels to start with period if made with asm_fprintf. */ 11718334Speter#undef LOCAL_LABEL_PREFIX 11818334Speter#define LOCAL_LABEL_PREFIX "." 11918334Speter 120117395Skan/* Support const sections and the ctors and dtors sections for g++. */ 12118334Speter 12218334Speter/* Define a few machine-specific details of the implementation of 12318334Speter constructors. 12418334Speter 12518334Speter The __CTORS_LIST__ goes in the .init section. Define CTOR_LIST_BEGIN 12618334Speter and CTOR_LIST_END to contribute to the .init section an instruction to 12718334Speter push a word containing 0 (or some equivalent of that). 12818334Speter 12990075Sobrien Define TARGET_ASM_CONSTRUCTOR to push the address of the constructor. */ 13018334Speter 13190075Sobrien#define INIT_SECTION_ASM_OP "\t.section\t.init" 13290075Sobrien#define FINI_SECTION_ASM_OP "\t.section .fini,\"x\"" 13318334Speter#define DTORS_SECTION_ASM_OP FINI_SECTION_ASM_OP 13418334Speter 13518334Speter/* CTOR_LIST_BEGIN and CTOR_LIST_END are machine-dependent 13618334Speter because they push on the stack. */ 13718334Speter 13818334Speter#ifndef STACK_GROWS_DOWNWARD 13918334Speter 14018334Speter/* Constructor list on stack is in reverse order. Go to the end of the 14118334Speter list and go backwards to call constructors in the right order. */ 14218334Speter#define DO_GLOBAL_CTORS_BODY \ 14318334Speterdo { \ 14418334Speter func_ptr *p, *beg = alloca (0); \ 14518334Speter for (p = beg; *p; p++) \ 14618334Speter ; \ 14718334Speter while (p != beg) \ 14818334Speter (*--p) (); \ 14918334Speter} while (0) 15018334Speter 15118334Speter#else 15218334Speter 15318334Speter/* Constructor list on stack is in correct order. Just call them. */ 15418334Speter#define DO_GLOBAL_CTORS_BODY \ 15518334Speterdo { \ 15618334Speter func_ptr *p, *beg = alloca (0); \ 15718334Speter for (p = beg; *p; ) \ 15818334Speter (*p++) (); \ 15918334Speter} while (0) 16018334Speter 16118334Speter#endif /* STACK_GROWS_DOWNWARD */ 162