1 /* Definitions of target machine for GNU compiler for Intel 80386 2 running FreeBSD. 3 Copyright (C) 1988, 1992, 1994, 1996, 1997, 1999, 2000, 2002, 2003 4 Free Software Foundation, Inc. 5 Contributed by Poul-Henning Kamp <phk@login.dkuug.dk> 6 Continued development by David O'Brien <obrien@NUXI.org> 7 8 This file is part of GNU CC. 9 10 GNU CC is free software; you can redistribute it and/or modify 11 it under the terms of the GNU General Public License as published by 12 the Free Software Foundation; either version 2, or (at your option) 13 any later version. 14 15 GNU CC is distributed in the hope that it will be useful, 16 but WITHOUT ANY WARRANTY; without even the implied warranty of 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 GNU General Public License for more details. 19 20 You should have received a copy of the GNU General Public License 21 along with GNU CC; see the file COPYING. If not, write to 22 the Free Software Foundation, 59 Temple Place - Suite 330, 23 Boston, MA 02111-1307, USA. */ 24 25 /* Don't assume anything about the header files. */ 26 #define NO_IMPLICIT_EXTERN_C 27 28 /* This goes away when the math-emulator is fixed */ 29 #undef TARGET_SUBTARGET_DEFAULT 30 #define TARGET_SUBTARGET_DEFAULT \ 31 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_NO_FANCY_MATH_387) 32 33 /* The macro defined in i386.h doesn't work with the old gas of 34 FreeBSD 2.x. The definition in sco.h and sol2.h appears to work, 35 but it turns out that, even though the assembler doesn't complain, 36 we get incorrect results. Fortunately, the definition in 37 defaults.h works. */ 38 #undef ASM_PREFERRED_EH_DATA_FORMAT 39 40 #define TARGET_OS_CPP_BUILTINS() \ 41 do \ 42 { \ 43 builtin_define_std ("unix"); \ 44 builtin_define ("__FreeBSD__"); \ 45 builtin_assert ("system=unix"); \ 46 builtin_assert ("system=bsd"); \ 47 builtin_assert ("system=FreeBSD"); \ 48 } \ 49 while (0) 50 51 /* Like the default, except no -lg. */ 52 #define LIB_SPEC "%{!shared:%{!pg:-lc}%{pg:-lc_p}}" 53 54 #undef SIZE_TYPE 55 #define SIZE_TYPE "unsigned int" 56 57 #undef PTRDIFF_TYPE 58 #define PTRDIFF_TYPE "int" 59 60 #undef WCHAR_TYPE 61 #define WCHAR_TYPE "int" 62 63 #undef WCHAR_TYPE_SIZE 64 #define WCHAR_TYPE_SIZE BITS_PER_WORD 65 66 /* Override the default comment-starter of "/". */ 67 68 #undef ASM_COMMENT_START 69 #define ASM_COMMENT_START "#" 70 71 #undef ASM_APP_ON 72 #define ASM_APP_ON "#APP\n" 73 74 #undef ASM_APP_OFF 75 #define ASM_APP_OFF "#NO_APP\n" 76 77 /* FreeBSD using a.out does not support DWARF2 unwinding mechanisms. */ 78 #define DWARF2_UNWIND_INFO 0 79 80 /* Don't default to pcc-struct-return, because in FreeBSD we prefer the 81 superior nature of the older gcc way. */ 82 #define DEFAULT_PCC_STRUCT_RETURN 0 83 84 /* Ensure we the configuration knows our system correctly so we can link with 85 libraries compiled with the native cc. */ 86 #undef NO_DOLLAR_IN_LABEL 87 88 /* i386 freebsd still uses old binutils that don't insert nops by default 89 when the .align directive demands to insert extra space in the text 90 segment. */ 91 #undef ASM_OUTPUT_ALIGN 92 #define ASM_OUTPUT_ALIGN(FILE,LOG) \ 93 if ((LOG)!=0) fprintf ((FILE), "\t.align %d,0x90\n", (LOG)) 94 95 /* Profiling routines, partially copied from i386/osfrose.h. */ 96 97 /* Tell final.c that we don't need a label passed to mcount. */ 98 #define NO_PROFILE_COUNTERS 1 99 100 #undef MCOUNT_NAME 101 #define MCOUNT_NAME "mcount" 102 #undef PROFILE_COUNT_REGISTER 103 #define PROFILE_COUNT_REGISTER "eax" 104 105 /* 106 * Some imports from svr4.h in support of shared libraries. 107 * Currently, we need the DECLARE_OBJECT_SIZE stuff. 108 */ 109 110 /* Define the strings used for the special svr4 .type and .size directives. 111 These strings generally do not vary from one system running svr4 to 112 another, but if a given system (e.g. m88k running svr) needs to use 113 different pseudo-op names for these, they may be overridden in the 114 file which includes this one. */ 115 116 #define TYPE_ASM_OP "\t.type\t" 117 #define SIZE_ASM_OP "\t.size\t" 118 #define SET_ASM_OP "\t.set\t" 119 120 /* The following macro defines the format used to output the second 121 operand of the .type assembler directive. Different svr4 assemblers 122 expect various different forms for this operand. The one given here 123 is just a default. You may need to override it in your machine- 124 specific tm.h file (depending upon the particulars of your assembler). */ 125 126 #define TYPE_OPERAND_FMT "@%s" 127 128 #define HANDLE_SYSV_PRAGMA 1 129 130 #define ASM_WEAKEN_LABEL(FILE,NAME) \ 131 do { fputs ("\t.weak\t", FILE); assemble_name (FILE, NAME); \ 132 fputc ('\n', FILE); } while (0) 133 134 /* Write the extra assembler code needed to declare a function's result. 135 Most svr4 assemblers don't require any special declaration of the 136 result value, but there are exceptions. */ 137 138 #ifndef ASM_DECLARE_RESULT 139 #define ASM_DECLARE_RESULT(FILE, RESULT) 140 #endif 141 142 /* These macros generate the special .type and .size directives which 143 are used to set the corresponding fields of the linker symbol table 144 entries in an ELF object file under SVR4. These macros also output 145 the starting labels for the relevant functions/objects. */ 146 147 /* Write the extra assembler code needed to declare a function properly. 148 Some svr4 assemblers need to also have something extra said about the 149 function's return value. We allow for that here. */ 150 151 #define ASM_DECLARE_FUNCTION_NAME(FILE, NAME, DECL) \ 152 do \ 153 { \ 154 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "function"); \ 155 ASM_DECLARE_RESULT (FILE, DECL_RESULT (DECL)); \ 156 ASM_OUTPUT_LABEL (FILE, NAME); \ 157 } \ 158 while (0) 159 160 /* Write the extra assembler code needed to declare an object properly. */ 161 162 #define ASM_DECLARE_OBJECT_NAME(FILE, NAME, DECL) \ 163 do \ 164 { \ 165 HOST_WIDE_INT size; \ 166 \ 167 ASM_OUTPUT_TYPE_DIRECTIVE (FILE, NAME, "object"); \ 168 \ 169 size_directive_output = 0; \ 170 if (!flag_inhibit_size_directive \ 171 && (DECL) && DECL_SIZE (DECL)) \ 172 { \ 173 size_directive_output = 1; \ 174 size = int_size_in_bytes (TREE_TYPE (DECL)); \ 175 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, NAME, size); \ 176 } \ 177 \ 178 ASM_OUTPUT_LABEL (FILE, NAME); \ 179 } \ 180 while (0) 181 182 /* Output the size directive for a decl in rest_of_decl_compilation 183 in the case where we did not do so before the initializer. 184 Once we find the error_mark_node, we know that the value of 185 size_directive_output was set 186 by ASM_DECLARE_OBJECT_NAME when it was run for the same decl. */ 187 188 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP_LEVEL, AT_END) \ 189 do { \ 190 const char *name = XSTR (XEXP (DECL_RTL (DECL), 0), 0); \ 191 HOST_WIDE_INT size; \ 192 if (!flag_inhibit_size_directive && DECL_SIZE (DECL) \ 193 && ! AT_END && TOP_LEVEL \ 194 && DECL_INITIAL (DECL) == error_mark_node \ 195 && !size_directive_output) \ 196 { \ 197 size_directive_output = 1; \ 198 size = int_size_in_bytes (TREE_TYPE (DECL)); \ 199 ASM_OUTPUT_SIZE_DIRECTIVE (FILE, name, size); \ 200 } \ 201 } while (0) 202 203 /* This is how to declare the size of a function. */ 204 205 #define ASM_DECLARE_FUNCTION_SIZE(FILE, FNAME, DECL) \ 206 do { \ 207 if (!flag_inhibit_size_directive) \ 208 ASM_OUTPUT_MEASURED_SIZE (FILE, FNAME); \ 209 } while (0) 210 211 #define ASM_SPEC " %| %{fpic:-k} %{fPIC:-k}" 212 #define LINK_SPEC \ 213 "%{p:%e`-p' not supported; use `-pg' and gprof(1)} \ 214 %{shared:-Bshareable} \ 215 %{!shared:%{!nostdlib:%{!r:%{!e*:-e start}}} -dc -dp %{static:-Bstatic} \ 216 %{pg:-Bstatic} %{Z}} \ 217 %{assert*} %{R*}" 218 219 #define STARTFILE_SPEC \ 220 "%{shared:c++rt0.o%s} \ 221 %{!shared:%{pg:gcrt0.o%s}%{!pg:%{static:scrt0.o%s}%{!static:crt0.o%s}}}" 222 223 /* Define this so we can compile MS code for use with WINE. */ 224 #define HANDLE_PRAGMA_PACK_PUSH_POP 225 226 /* FreeBSD 2.2.7's assembler does not support .quad properly. Do not 227 use it. */ 228 #undef ASM_QUAD 229