freebsd.h revision 123715
1/* Definitions for Intel 386 running FreeBSD with ELF format 2 Copyright (C) 1996, 2000, 2002 Free Software Foundation, Inc. 3 Contributed by Eric Youngdale. 4 Modified for stabs-in-ELF by H.J. Lu. 5 Adapted from GNU/Linux version by John Polstra. 6 Continued development by David O'Brien <obrien@freebsd.org> 7 8This file is part of GNU CC. 9 10GNU CC is free software; you can redistribute it and/or modify 11it under the terms of the GNU General Public License as published by 12the Free Software Foundation; either version 2, or (at your option) 13any later version. 14 15GNU CC is distributed in the hope that it will be useful, 16but WITHOUT ANY WARRANTY; without even the implied warranty of 17MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18GNU General Public License for more details. 19 20You should have received a copy of the GNU General Public License 21along with GNU CC; see the file COPYING. If not, write to 22the Free Software Foundation, 59 Temple Place - Suite 330, 23Boston, MA 02111-1307, USA. */ 24 25/* $FreeBSD: head/contrib/gcc/config/i386/freebsd.h 123715 2003-12-22 04:27:17Z kan $ */ 26 27#undef CC1_SPEC 28#define CC1_SPEC "%(cc1_cpu) %{profile:-p}" 29 30#undef ASM_SPEC 31#define ASM_SPEC "%{v*: -v}" 32 33#undef ASM_FINAL_SPEC 34#define ASM_FINAL_SPEC "%|" 35 36/* Provide a LINK_SPEC appropriate for FreeBSD. Here we provide support 37 for the special GCC options -static and -shared, which allow us to 38 link things in one of these three modes by applying the appropriate 39 combinations of options at link-time. We like to support here for 40 as many of the other GNU linker options as possible. But I don't 41 have the time to search for those flags. I am sure how to add 42 support for -soname shared_object_name. H.J. 43 44 When the -shared link option is used a final link is not being 45 done. */ 46 47#undef LINK_SPEC 48#define LINK_SPEC "\ 49 %{p:%nconsider using `-pg' instead of `-p' with gprof(1) } \ 50 %{Wl,*:%*} \ 51 %{v:-V} \ 52 %{assert*} %{R*} %{rpath*} %{defsym*} \ 53 %{shared:-Bshareable %{h*} %{soname*}} \ 54 %{!shared: \ 55 %{!static: \ 56 %{rdynamic: -export-dynamic} \ 57 %{!dynamic-linker: -dynamic-linker /libexec/ld-elf.so.1}} \ 58 %{static:-Bstatic}} \ 59 %{symbolic:-Bsymbolic}" 60 61/* Reset our STARTFILE_SPEC which was properly set in config/freebsd.h 62 but trashed by config/<cpu>/<file.h>. */ 63 64#undef STARTFILE_SPEC 65#define STARTFILE_SPEC FBSD_STARTFILE_SPEC 66 67/* Provide an ENDFILE_SPEC appropriate for FreeBSD/i386. */ 68 69#undef ENDFILE_SPEC 70#define ENDFILE_SPEC FBSD_ENDFILE_SPEC 71 72 73/************************[ Target stuff ]***********************************/ 74 75/* Define the actual types of some ANSI-mandated types. 76 Needs to agree with <machine/ansi.h>. GCC defaults come from c-decl.c, 77 c-common.c, and config/<arch>/<arch>.h. */ 78 79#undef SIZE_TYPE 80#define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int") 81 82#undef PTRDIFF_TYPE 83#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int") 84 85#undef WCHAR_TYPE_SIZE 86#define WCHAR_TYPE_SIZE (TARGET_64BIT ? 32 : BITS_PER_WORD) 87 88#define TARGET_VERSION fprintf (stderr, " (i386 FreeBSD/ELF)"); 89 90#define MASK_PROFILER_EPILOGUE 010000000000 91 92#define TARGET_PROFILER_EPILOGUE (target_flags & MASK_PROFILER_EPILOGUE) 93#define TARGET_ELF 1 94 95#undef SUBTARGET_SWITCHES 96#define SUBTARGET_SWITCHES \ 97 { "profiler-epilogue", MASK_PROFILER_EPILOGUE, "Function profiler epilogue"}, \ 98 { "no-profiler-epilogue", -MASK_PROFILER_EPILOGUE, "No function profiler epilogue"}, 99 100/* This goes away when the math emulator is fixed. */ 101#undef TARGET_SUBTARGET_DEFAULT 102#define TARGET_SUBTARGET_DEFAULT \ 103 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_NO_FANCY_MATH_387) 104 105/* Don't default to pcc-struct-return, we want to retain compatibility with 106 older gcc versions AND pcc-struct-return is nonreentrant. 107 (even though the SVR4 ABI for the i386 says that records and unions are 108 returned in memory). */ 109 110#undef DEFAULT_PCC_STRUCT_RETURN 111#define DEFAULT_PCC_STRUCT_RETURN 0 112 113/* FreeBSD sets the rounding precision of the FPU to 53 bits. Let the 114 compiler get the contents of <float.h> and std::numeric_limits correct. */ 115#define SUBTARGET_OVERRIDE_OPTIONS \ 116 do { \ 117 if (!TARGET_64BIT) { \ 118 real_format_for_mode[XFmode - QFmode] \ 119 = &ieee_extended_intel_96_round_53_format; \ 120 real_format_for_mode[TFmode - QFmode] \ 121 = &ieee_extended_intel_96_round_53_format; \ 122 } \ 123 } while (0) 124 125/* Tell final.c that we don't need a label passed to mcount. */ 126#define NO_PROFILE_COUNTERS 1 127 128/* Output assembler code to FILE to begin profiling of the current function. 129 LABELNO is an optional label. */ 130 131#undef MCOUNT_NAME 132#define MCOUNT_NAME ".mcount" 133 134/* Output assembler code to FILE to end profiling of the current function. */ 135 136#undef FUNCTION_PROFILER_EPILOGUE /* BDE will need to fix this. */ 137 138 139/************************[ Assembler stuff ]********************************/ 140 141/* Override the default comment-starter of "/" from unix.h. */ 142#undef ASM_COMMENT_START 143#define ASM_COMMENT_START "#" 144 145/* Override the default comment-starter of "/APP" from unix.h. */ 146#undef ASM_APP_ON 147#define ASM_APP_ON "#APP\n" 148#undef ASM_APP_OFF 149#define ASM_APP_OFF "#NO_APP\n" 150 151/* XXX:DEO do we still need this override to defaults.h ?? */ 152/* This is how to output a reference to a user-level label named NAME. */ 153#undef ASM_OUTPUT_LABELREF 154#define ASM_OUTPUT_LABELREF(FILE, NAME) \ 155 do { \ 156 const char *xname = (NAME); \ 157 /* Hack to avoid writing lots of rtl in \ 158 FUNCTION_PROFILER_EPILOGUE (). */ \ 159 if (*xname == '.' && strcmp(xname + 1, "mexitcount") == 0) \ 160 { \ 161 if (flag_pic) \ 162 fprintf ((FILE), "*%s@GOT(%%ebx)", xname); \ 163 else \ 164 fprintf ((FILE), "%s", xname); \ 165 } \ 166 else \ 167 { \ 168 if (xname[0] == '%') \ 169 xname += 2; \ 170 if (xname[0] == '*') \ 171 xname += 1; \ 172 else \ 173 fputs (user_label_prefix, FILE); \ 174 fputs (xname, FILE); \ 175 } \ 176} while (0) 177 178/* This is how to hack on the symbol code of certain relcalcitrant 179 symbols to modify their output in output_pic_addr_const (). */ 180 181#undef ASM_HACK_SYMBOLREF_CODE /* BDE will need to fix this. */ 182 183#undef ASM_OUTPUT_ALIGN 184#define ASM_OUTPUT_ALIGN(FILE, LOG) \ 185 do { \ 186 if ((LOG)!=0) { \ 187 if (in_text_section()) \ 188 fprintf ((FILE), "\t.p2align %d,0x90\n", (LOG)); \ 189 else \ 190 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ 191 } \ 192 } while (0) 193 194/* A C statement to output to the stdio stream FILE an assembler 195 command to advance the location counter to a multiple of 1<<LOG 196 bytes if it is within MAX_SKIP bytes. 197 198 This is used to align code labels according to Intel recommendations. */ 199 200/* XXX configuration of this is broken in the same way as HAVE_GAS_SHF_MERGE, 201 but it is easier to fix in an MD way. */ 202 203#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN 204#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \ 205 do { \ 206 if ((LOG) != 0) { \ 207 if ((MAX_SKIP) == 0) \ 208 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ 209 else \ 210 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \ 211 } \ 212 } while (0) 213#endif 214 215/* If defined, a C expression whose value is a string containing the 216 assembler operation to identify the following data as 217 uninitialized global data. If not defined, and neither 218 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined, 219 uninitialized global data will be output in the data section if 220 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be 221 used. */ 222#undef BSS_SECTION_ASM_OP 223#define BSS_SECTION_ASM_OP "\t.section\t.bss" 224 225/* Like `ASM_OUTPUT_BSS' except takes the required alignment as a 226 separate, explicit argument. If you define this macro, it is used 227 in place of `ASM_OUTPUT_BSS', and gives you more flexibility in 228 handling the required alignment of the variable. The alignment is 229 specified as the number of bits. 230 231 Try to use function `asm_output_aligned_bss' defined in file 232 `varasm.c' when defining this macro. */ 233#undef ASM_OUTPUT_ALIGNED_BSS 234#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 235 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) 236 237/************************[ Debugger stuff ]*********************************/ 238 239#undef DBX_REGISTER_NUMBER 240#define DBX_REGISTER_NUMBER(n) (TARGET_64BIT ? dbx64_register_map[n] \ 241 : (write_symbols == DWARF2_DEBUG \ 242 || write_symbols == DWARF_DEBUG) \ 243 ? svr4_dbx_register_map[(n)] \ 244 : dbx_register_map[(n)]) 245 246/* The same functions are used to creating the DWARF2 debug info and C++ 247 unwind info (except.c). Regardless of the debug format requested, the 248 register numbers used in exception unwinding sections still have to be 249 DWARF compatible. IMO the GCC folks may be abusing the DBX_REGISTER_NUMBER 250 macro to mean too much. */ 251#define DWARF_FRAME_REGNUM(n) (TARGET_64BIT ? dbx64_register_map[n] \ 252 : svr4_dbx_register_map[(n)]) 253 254/* stabs-in-elf has offsets relative to function beginning */ 255#undef DBX_OUTPUT_LBRAC 256#define DBX_OUTPUT_LBRAC(FILE, NAME) \ 257 do { \ 258 fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_LBRAC); \ 259 assemble_name (asmfile, buf); \ 260 fputc ('-', asmfile); \ 261 assemble_name (asmfile, \ 262 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \ 263 fprintf (asmfile, "\n"); \ 264 } while (0) 265 266#undef DBX_OUTPUT_RBRAC 267#define DBX_OUTPUT_RBRAC(FILE, NAME) \ 268 do { \ 269 fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_RBRAC); \ 270 assemble_name (asmfile, buf); \ 271 fputc ('-', asmfile); \ 272 assemble_name (asmfile, \ 273 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \ 274 fprintf (asmfile, "\n"); \ 275 } while (0) 276