freebsd.h revision 18604
1/* Definitions of target machine for GNU compiler for Intel 80386 2 running FreeBSD. 3 Copyright (C) 1988, 1992, 1994 Free Software Foundation, Inc. 4 Contributed by Poul-Henning Kamp <phk@login.dkuug.dk> 5 6This file is part of GNU CC. 7 8GNU CC 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 13GNU CC 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 GNU CC; see the file COPYING. If not, write to 20the Free Software Foundation, 59 Temple Place - Suite 330, 21Boston, MA 02111-1307, USA. */ 22 23/* This is tested by i386gas.h. */ 24#define YES_UNDERSCORES 25 26/* Don't assume anything about the header files. */ 27#define NO_IMPLICIT_EXTERN_C 28 29#include "i386/gstabs.h" 30 31/* Get perform_* macros to build libgcc.a. */ 32#include "i386/perform.h" 33 34/* This was cloned from ../netbsd.h. It and several other things in 35 this file should be in ../freebsd.h. */ 36/* FREEBSD_NATIVE is defined when gcc is integrated into the FreeBSD 37 source tree so it can be configured appropriately without using 38 the GNU configure/build mechanism. */ 39 40#ifdef FREEBSD_NATIVE 41 42/* Look for the include files in the system-defined places. */ 43 44#define GPLUSPLUS_INCLUDE_DIR "/usr/include/g++" 45 46#define GCC_INCLUDE_DIR "/usr/include" 47 48/* FreeBSD has GCC_INCLUDE_DIR first. */ 49#define INCLUDE_DEFAULTS \ 50 { \ 51 { GCC_INCLUDE_DIR, 0, 0 }, \ 52 { GPLUSPLUS_INCLUDE_DIR, 1, 1 }, \ 53 { 0, 0, 0 } \ 54 } 55 56/* Under FreeBSD, the normal location of the compiler back ends is the 57 /usr/libexec directory. */ 58 59#define STANDARD_EXEC_PREFIX "/usr/libexec/" 60 61/* Under FreeBSD, the normal location of the various *crt*.o files is the 62 /usr/lib directory. */ 63 64#define STANDARD_STARTFILE_PREFIX "/usr/lib/" 65 66/* On FreeBSD, gcc is called 'cc' */ 67#define GCC_NAME "cc" 68 69/* FreeBSD is 4.4BSD derived */ 70#define bsd4_4 71 72#endif /* FREEBSD_NATIVE */ 73 74#define MASK_PROFILER_EPILOGUE 010000000000 75 76#define TARGET_PROFILER_EPILOGUE (target_flags & MASK_PROFILER_EPILOGUE) 77 78#undef SUBTARGET_SWITCHES 79#define SUBTARGET_SWITCHES \ 80 { "profiler-epilogue", MASK_PROFILER_EPILOGUE}, \ 81 { "no-profiler-epilogue", -MASK_PROFILER_EPILOGUE}, 82 83 84#undef CPP_PREDEFINES 85#define CPP_PREDEFINES "-Dunix -Di386 -D__FreeBSD__=2 -Asystem(unix) -Asystem(FreeBSD) -Acpu(i386) -Amachine(i386)" 86 87#define ASM_SPEC " %| %{fpic:-k} %{fPIC:-k}" 88 89/* Like the default, except no -lg. */ 90#define LIB_SPEC "%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}" 91 92#define LINK_SPEC \ 93 "%{!nostdlib:%{!r:%{!e*:-e start}}} -dc -dp %{static:-Bstatic} %{assert*} \ 94 %{p:-Bstatic} %{pg:-Bstatic} %{Z} %{R*}" 95 96#define LINK_LIBGCC_SPECIAL_1 1 97 98#define STARTFILE_SPEC \ 99 "%{pg:gcrt0.o%s}%{!pg:%{p:mcrt0.o%s}%{!p:%{static:scrt0.o%s}%{!static:crt0.o%s}}}" 100 101/* This goes away when the math emulator is fixed. */ 102#undef TARGET_DEFAULT 103#define TARGET_DEFAULT (MASK_NO_FANCY_MATH_387 | 0301) 104 105#undef SIZE_TYPE 106#define SIZE_TYPE "unsigned int" 107 108#undef PTRDIFF_TYPE 109#define PTRDIFF_TYPE "int" 110 111#undef WCHAR_TYPE 112#define WCHAR_TYPE "int" 113 114#define WCHAR_UNSIGNED 0 115 116#undef WCHAR_TYPE_SIZE 117#define WCHAR_TYPE_SIZE BITS_PER_WORD 118 119#define HAVE_ATEXIT 120 121#define HAVE_PUTENV 122 123/* Override the default comment-starter of "/". */ 124 125#undef ASM_COMMENT_START 126#define ASM_COMMENT_START "#" 127 128#undef ASM_APP_ON 129#define ASM_APP_ON "#APP\n" 130 131#undef ASM_APP_OFF 132#define ASM_APP_OFF "#NO_APP\n" 133 134/* The following macros are stolen from i386v4.h */ 135/* These have to be defined to get PIC code correct */ 136 137/* This is how to output an element of a case-vector that is relative. 138 This is only used for PIC code. See comments by the `casesi' insn in 139 i386.md for an explanation of the expression this outputs. */ 140 141#undef ASM_OUTPUT_ADDR_DIFF_ELT 142#define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, VALUE, REL) \ 143 fprintf (FILE, "\t.long _GLOBAL_OFFSET_TABLE_+[.-%s%d]\n", LPREFIX, VALUE) 144 145/* Indicate that jump tables go in the text section. This is 146 necessary when compiling PIC code. */ 147 148#define JUMP_TABLES_IN_TEXT_SECTION 149 150/* Don't default to pcc-struct-return, because gcc is the only compiler, and 151 we want to retain compatibility with older gcc versions. */ 152#define DEFAULT_PCC_STRUCT_RETURN 0 153 154/* Tell final.c that we don't need a label passed to mcount. */ 155 156#define NO_PROFILE_DATA 157 158/* Redefine this to not pass an unused label in %edx. */ 159 160#undef FUNCTION_PROFILER 161#define FUNCTION_PROFILER(FILE, LABELNO) \ 162{ \ 163 if (flag_pic) \ 164 fprintf (FILE, "\tcall *mcount@GOT(%%ebx)\n"); \ 165 else \ 166 fprintf (FILE, "\tcall mcount\n"); \ 167} 168 169#define FUNCTION_PROFILER_EPILOGUE(FILE) \ 170{ \ 171 if (TARGET_PROFILER_EPILOGUE) \ 172 { \ 173 if (flag_pic) \ 174 fprintf (FILE, "\tcall *mexitcount@GOT(%%ebx)\n"); \ 175 else \ 176 fprintf (FILE, "\tcall mexitcount\n"); \ 177 } \ 178} 179 180/* 181 * Some imports from svr4.h in support of shared libraries. 182 * Currently, we need the DECLARE_OBJECT_SIZE stuff. 183 */ 184 185#define HANDLE_SYSV_PRAGMA 186 187/* Define the strings used for the special svr4 .type and .size directives. 188 These strings generally do not vary from one system running svr4 to 189 another, but if a given system (e.g. m88k running svr) needs to use 190 different pseudo-op names for these, they may be overridden in the 191 file which includes this one. */ 192 193#define TYPE_ASM_OP ".type" 194#define SIZE_ASM_OP ".size" 195#define SET_ASM_OP ".set" 196 197/* This is how we tell the assembler that a symbol is weak. */ 198#define ASM_WEAKEN_LABEL(FILE,NAME) \ 199 do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \ 200 fputc ('\n', FILE); } while (0) 201 202/* The following macro defines the format used to output the second 203 operand of the .type assembler directive. Different svr4 assemblers 204 expect various different forms for this operand. The one given here 205 is just a default. You may need to override it in your machine- 206 specific tm.h file (depending upon the particulars of your assembler). */ 207 208#define TYPE_OPERAND_FMT "@%s" 209 210/* Write the extra assembler code needed to declare a function's result. 211 Most svr4 assemblers don't require any special declaration of the 212 result value, but there are exceptions. */ 213 214#ifndef ASM_DECLARE_RESULT 215#define ASM_DECLARE_RESULT(FILE, RESULT) 216#endif 217 218/* These macros generate the special .type and .size directives which 219 are used to set the corresponding fields of the linker symbol table 220 entries in an ELF object file under SVR4. These macros also output 221 the starting labels for the relevant functions/objects. */ 222 223/* Write the extra assembler code needed to declare a function properly. 224 Some svr4 assemblers need to also have something extra said about the 225 function's return value. We allow for that here. */ 226 227#define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 228 do { \ 229 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \ 230 assemble_name (FILE, NAME); \ 231 putc (',', FILE); \ 232 fprintf (FILE, TYPE_OPERAND_FMT, "function"); \ 233 putc ('\n', FILE); \ 234 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \ 235 ASM_OUTPUT_LABEL(FILE, NAME); \ 236 } while (0) 237 238/* Write the extra assembler code needed to declare an object properly. */ 239 240#define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \ 241 do { \ 242 fprintf (FILE, "\t%s\t ", TYPE_ASM_OP); \ 243 assemble_name (FILE, NAME); \ 244 putc (',', FILE); \ 245 fprintf (FILE, TYPE_OPERAND_FMT, "object"); \ 246 putc ('\n', FILE); \ 247 size_directive_output = 0; \ 248 if (!flag_inhibit_size_directive && DECL_SIZE (DECL)) \ 249 { \ 250 size_directive_output = 1; \ 251 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \ 252 assemble_name (FILE, NAME); \ 253 fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL))); \ 254 } \ 255 ASM_OUTPUT_LABEL(FILE, NAME); \ 256 } while (0) 257 258/* Output the size directive for a decl in rest_of_decl_compilation 259 in the case where we did not do so before the initializer. 260 Once we find the error_mark_node, we know that the value of 261 size_directive_output was set 262 by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */ 263 264#define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \ 265do { \ 266 char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \ 267 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \ 268 && ! AT_END && TOP_LEVEL \ 269 && DECL_INITIAL (DECL) == error_mark_node \ 270 && !size_directive_output) \ 271 { \ 272 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \ 273 assemble_name (FILE, name); \ 274 fprintf (FILE, ",%d\n", int_size_in_bytes (TREE_TYPE (DECL)));\ 275 } \ 276 } while (0) 277 278 279/* This is how to declare the size of a function. */ 280 281#define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \ 282 do { \ 283 if (!flag_inhibit_size_directive) \ 284 { \ 285 char label[256]; \ 286 static int labelno; \ 287 labelno++; \ 288 ASM_GENERATE_INTERNAL_LABEL (label, "Lfe", labelno); \ 289 ASM_OUTPUT_INTERNAL_LABEL (FILE, "Lfe", labelno); \ 290 fprintf (FILE, "\t%s\t ", SIZE_ASM_OP); \ 291 assemble_name (FILE, (FNAME)); \ 292 fprintf (FILE, ","); \ 293 assemble_name (FILE, label); \ 294 fprintf (FILE, "-"); \ 295 assemble_name (FILE, (FNAME)); \ 296 putc ('\n', FILE); \ 297 } \ 298 } while (0) 299