From 09da0d1cf88436495f5f0101a2381ca4ab27e905 Mon Sep 17 00:00:00 2001 From: Richard Stallman Date: Thu, 23 Jan 1992 18:32:58 +0000 Subject: [PATCH] Initial revision From-SVN: r232 --- gcc/config/svr3.h | 322 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 322 insertions(+) create mode 100644 gcc/config/svr3.h diff --git a/gcc/config/svr3.h b/gcc/config/svr3.h new file mode 100644 index 0000000..7726da1 --- /dev/null +++ b/gcc/config/svr3.h @@ -0,0 +1,322 @@ +/* svr3.h -- operating system specific defines to be used when + targeting GCC for some generic System V Release 3 system. + Copyright (C) 1991 Free Software Foundation, Inc. + + Written by Ron Guilmette (rfg@ncd.com). + +This file is part of GNU CC. + +GNU CC is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU CC is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU CC; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + + To use this file, make up a file with a name like: + + ?????svr3.h + + where ????? is replaced by the name of the basic hardware that you + are targeting for. Then, in the file ?????svr3.h, put something + like: + + #include "?????.h" + #include "svr3.h" + + followed by any really system-specific defines (or overrides of + defines) which you find that you need. For example, CPP_PREDEFINES + is defined here with only the defined -Dunix and -DSVR3. You should + probably override that in your target-specific ?????svr3.h file + with a set of defines that includes these, but also contains an + appropriate define for the type of hardware that you are targeting. +*/ + +/* Define a symbol so that libgcc* can know what sort of operating + environment and assembler syntax we are targeting for. */ +#define SVR3_target + +/* Cpp, assembler, linker, library, and startfile spec's. */ + +/* You should redefine CPP_PREDEFINES in any file which includes this one. + The definition should be appropriate for the type of target system + involved, and it should include any -A (assertion) options which are + appropriate for the given target system. */ + +#undef CPP_PREDEFINES + +/* Output at beginning of assembler file. */ +/* The .file command should always begin the output. */ + +#undef ASM_FILE_START +#define ASM_FILE_START(FILE) \ + do { output_file_directive ((FILE), main_input_filename); \ + if (optimize) ASM_FILE_START_1 (FILE); \ + } while (0) + +/* By default, do nothing: a few machines support .optim, but not most. */ +#undef ASM_FILE_START_1 +#define ASM_FILE_START_1(FILE) + +/* This says how to output an assembler line + to define a global common symbol. */ +/* We don't use ROUNDED because the standard compiler doesn't, + and the linker gives error messages if a common symbol + has more than one length value. */ + +#undef ASM_OUTPUT_COMMON +#define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \ +( fputs (".comm ", (FILE)), \ + assemble_name ((FILE), (NAME)), \ + fprintf ((FILE), ",%u\n", (SIZE))) + +/* This says how to output an assembler line + to define a local common symbol. */ + +/* Note that using bss_section here caused errors + in building shared libraries on system V.3. */ +#undef ASM_OUTPUT_LOCAL +#define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \ + do { \ + int align = exact_log2 (ROUNDED); \ + if (align > 2) align = 2; \ + data_section (); \ + ASM_OUTPUT_ALIGN ((FILE), align == -1 ? 2 : align); \ + ASM_OUTPUT_LABEL ((FILE), (NAME)); \ + fprintf ((FILE), "\t.set .,.+%u\n", (ROUNDED)); \ + } while (0) + +#if 0 /* For now, let's leave these machine-specific. */ +/* Use crt1.o as a startup file and crtn.o as a closing file. */ + +#define STARTFILE_SPEC \ + "%{pg:gcrt1.o%s}%{!pg:%{p:mcrt1.o%s}%{!p:crt1.o%s}}" + +#define LIB_SPEC "%{p:-L/usr/lib/libp}%{pg:-L/usr/lib/libp} -lc crtn.o%s" + +/* Special flags for the linker. I don't know what they do. */ + +#define LINK_SPEC "%{T*} %{z:-lm}" +#endif + +/* Allow #sccs in preprocessor. */ + +#define SCCS_DIRECTIVE + +/* Output #ident as a .ident. */ + +#define ASM_OUTPUT_IDENT(FILE, NAME) \ + fprintf (FILE, "\t.ident \"%s\"\n", NAME); + +/* Use periods rather than dollar signs in special g++ assembler names. */ + +#define NO_DOLLAR_IN_LABEL + +/* Implicit library calls should use memcpy, not bcopy, etc. */ + +#define TARGET_MEM_FUNCTIONS + +/* System V Release 3 uses COFF debugging info. */ + +#define SDB_DEBUGGING_INFO + +/* We don't want to output DBX debugging information. */ + +#undef DBX_DEBUGGING_INFO + +/* Define the actual types of some ANSI-mandated types. These + definitions should work for most SVR3 systems. */ + +#undef SIZE_TYPE +#define SIZE_TYPE "unsigned int" + +#undef PTRDIFF_TYPE +#define PTRDIFF_TYPE "int" + +#undef WCHAR_TYPE +#define WCHAR_TYPE "long int" + +#undef WCHAR_TYPE_SIZE +#define WCHAR_TYPE_SIZE BITS_PER_WORD + +/* Assembler pseudos to introduce constants of various size. These + definitions hsould work for most svr3 systems. */ + +#undef ASM_BYTE_OP +#define ASM_BYTE_OP "\t.byte" + +/* This is how to output a reference to a user-level label named NAME. + `assemble_name' uses this. + + For System V Release 3 the convention is to prepend a leading + underscore onto user-level symbol names. */ + +#undef ASM_OUTPUT_LABELREF +#define ASM_OUTPUT_LABELREF(FILE,NAME) fprintf (FILE, "_%s", NAME) + +/* Support const sections and the ctors and dtors sections for g++. + Note that there appears to be two different ways to support const + sections at the moment. You can either #define the symbol + READONLY_DATA_SECTION (giving it some code which switches to the + readonly data section) or else you can #define the symbols + EXTRA_SECTIONS, EXTRA_SECTION_FUNCTIONS, SELECT_SECTION, and + SELECT_RTX_SECTION. We do both here just to be on the safe side. + However, use of the const section is turned off by default + unless the specific tm.h file turns it on by defining + USE_CONST_SECTION as 1. */ + +/* The support for constructors and destructors depends on two + machine-specific macros that the individual tm.h file has to define: + + CTORS_SECTION_ASM_OP should be defined to concatenate + the macro INIT_SECTION_ASM_OP, a newline, and a push instruction + to push a word containing 0 (or some equivalent of that). + + ASM_OUTPUT_CONSTRUCTOR should be defined + to push the address of the constructor. */ + +#define USE_CONST_SECTION 0 + +#define INIT_SECTION_ASM_OP "\t.section\t.init" +#define FINI_SECTION_ASM_OP ".section .fini,\"x\"" +#define CONST_SECTION_ASM_OP "\t.section\t.rodata, \"x\"" + +#define DTORS_SECTION_ASM_OP FINI_SECTION_ASM_OP +/* CTORS_SECTION_ASM_OP is machine-dependent + because it pushes on the stack. */ + +#define DO_GLOBAL_CTORS_BODY \ +do { \ + func_ptr *__CTOR_LIST__ = __builtin_alloca (0), *p; \ + for (p = __CTOR_LIST__; *p; ) \ + (*p++) (); \ +} while (0) + +/* Add extra sections .init and .fini, in addition to .bss from att386.h. */ + +#undef EXTRA_SECTIONS +#define EXTRA_SECTIONS in_const, in_bss, in_init, in_fini + +#undef EXTRA_SECTION_FUNCTIONS +#define EXTRA_SECTION_FUNCTIONS \ + CONST_SECTION_FUNCTION \ + BSS_SECTION_FUNCTION \ + INIT_SECTION_FUNCTION \ + FINI_SECTION_FUNCTION + +#define INIT_SECTION_FUNCTION \ +void \ +init_section () \ +{ \ + if (in_section != in_init) \ + { \ + fprintf (asm_out_file, "\t%s\n", INIT_SECTION_ASM_OP); \ + in_section = in_init; \ + } \ +} + +#define FINI_SECTION_FUNCTION \ +void \ +fini_section () \ +{ \ + if (in_section != in_fini) \ + { \ + fprintf (asm_out_file, "\t%s\n", FINI_SECTION_ASM_OP); \ + in_section = in_fini; \ + } \ +} + +#define READONLY_DATA_SECTION() const_section () + +#define CONST_SECTION_FUNCTION \ +void \ +const_section () \ +{ \ + extern void text_section(); \ + if (!USE_CONST_SECTION) \ + text_section(); \ + else if (in_section != in_const) \ + { \ + fprintf (asm_out_file, "%s\n", CONST_SECTION_ASM_OP); \ + in_section = in_const; \ + } \ +} + +#if 0 +#define CTORS_SECTION_FUNCTION \ +void \ +ctors_section () \ +{ \ + if (in_section != in_ctors) \ + { \ + fprintf (asm_out_file, "%s\n", CTORS_SECTION_ASM_OP); \ + in_section = in_ctors; \ + } \ +} + +#define DTORS_SECTION_FUNCTION \ +void \ +dtors_section () \ +{ \ + if (in_section != in_dtors) \ + { \ + fprintf (asm_out_file, "%s\n", DTORS_SECTION_ASM_OP); \ + in_section = in_dtors; \ + } \ +} +#endif + +/* This is machine-dependent + because it needs to push something on the stack. */ +#undef ASM_OUTPUT_CONSTRUCTOR + +/* A C statement (sans semicolon) to output an element in the table of + global destructors. */ +#define ASM_OUTPUT_DESTRUCTOR(FILE,NAME) \ + do { \ + fini_section (); \ + fprintf (FILE, "%s\t ", ASM_LONG); \ + assemble_name (FILE, NAME); \ + fprintf (FILE, "\n"); \ + } while (0) + +/* A C statement or statements to switch to the appropriate + section for output of DECL. DECL is either a `VAR_DECL' node + or a constant of some sort. RELOC indicates whether forming + the initial value of DECL requires link-time relocations. */ + +#define SELECT_SECTION(DECL,RELOC) \ +{ \ + if (TREE_CODE (DECL) == STRING_CST) \ + { \ + if (! flag_writable_strings) \ + const_section (); \ + else \ + data_section (); \ + } \ + else if (TREE_CODE (DECL) == VAR_DECL) \ + { \ + if ((0 && RELOC) /* should be (flag_pic && RELOC) */ \ + || !TREE_READONLY (DECL) || TREE_SIDE_EFFECTS (DECL)) \ + data_section (); \ + else \ + const_section (); \ + } \ + else \ + const_section (); \ +} + +/* A C statement or statements to switch to the appropriate + section for output of RTX in mode MODE. RTX is some kind + of constant in RTL. The argument MODE is redundant except + in the case of a `const_int' rtx. Currently, these always + go into the const section. */ + +#define SELECT_RTX_SECTION(MODE,RTX) const_section() -- 2.7.4