freebsd.h revision 132741
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 GCC. 9 10GCC 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 15GCC 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 GCC; 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 132741 2004-07-28 04:41:42Z 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 %(fbsd_dynamic_linker) }} \ 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#undef SUBTARGET_EXTRA_SPECS /* i386.h bogusly defines it. */ 89#define SUBTARGET_EXTRA_SPECS \ 90 { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER } 91 92#define TARGET_VERSION fprintf (stderr, " (i386 FreeBSD/ELF)"); 93 94#define MASK_PROFILER_EPILOGUE 010000000000 95 96#define TARGET_PROFILER_EPILOGUE (target_flags & MASK_PROFILER_EPILOGUE) 97#define TARGET_ELF 1 98 99#undef SUBTARGET_SWITCHES 100#define SUBTARGET_SWITCHES \ 101 { "profiler-epilogue", MASK_PROFILER_EPILOGUE, "Function profiler epilogue"}, \ 102 { "no-profiler-epilogue", -MASK_PROFILER_EPILOGUE, "No function profiler epilogue"}, 103 104/* This goes away when the math emulator is fixed. */ 105#undef TARGET_SUBTARGET_DEFAULT 106#define TARGET_SUBTARGET_DEFAULT \ 107 (MASK_80387 | MASK_IEEE_FP | MASK_FLOAT_RETURNS | MASK_NO_FANCY_MATH_387) 108 109/* Don't default to pcc-struct-return, we want to retain compatibility with 110 older gcc versions AND pcc-struct-return is nonreentrant. 111 (even though the SVR4 ABI for the i386 says that records and unions are 112 returned in memory). */ 113 114#undef DEFAULT_PCC_STRUCT_RETURN 115#define DEFAULT_PCC_STRUCT_RETURN 0 116 117/* FreeBSD sets the rounding precision of the FPU to 53 bits. Let the 118 compiler get the contents of <float.h> and std::numeric_limits correct. */ 119#define SUBTARGET_OVERRIDE_OPTIONS \ 120 do { \ 121 if (!TARGET_64BIT) { \ 122 REAL_MODE_FORMAT (XFmode) \ 123 = &ieee_extended_intel_96_round_53_format; \ 124 REAL_MODE_FORMAT (TFmode) \ 125 = &ieee_extended_intel_96_round_53_format; \ 126 } \ 127 } while (0) 128 129/* Tell final.c that we don't need a label passed to mcount. */ 130#define NO_PROFILE_COUNTERS 1 131 132/* Output assembler code to FILE to begin profiling of the current function. 133 LABELNO is an optional label. */ 134 135#undef MCOUNT_NAME 136#define MCOUNT_NAME ".mcount" 137 138/* Output assembler code to FILE to end profiling of the current function. */ 139 140#undef FUNCTION_PROFILER_EPILOGUE /* BDE will need to fix this. */ 141 142 143/************************[ Assembler stuff ]********************************/ 144 145/* Override the default comment-starter of "/" from unix.h. */ 146#undef ASM_COMMENT_START 147#define ASM_COMMENT_START "#" 148 149/* Override the default comment-starter of "/APP" from unix.h. */ 150#undef ASM_APP_ON 151#define ASM_APP_ON "#APP\n" 152#undef ASM_APP_OFF 153#define ASM_APP_OFF "#NO_APP\n" 154 155/* XXX:DEO do we still need this override to defaults.h ?? */ 156/* This is how to output a reference to a user-level label named NAME. */ 157#undef ASM_OUTPUT_LABELREF 158#define ASM_OUTPUT_LABELREF(FILE, NAME) \ 159 do { \ 160 const char *xname = (NAME); \ 161 /* Hack to avoid writing lots of rtl in \ 162 FUNCTION_PROFILER_EPILOGUE (). */ \ 163 if (*xname == '.' && strcmp(xname + 1, "mexitcount") == 0) \ 164 { \ 165 if (flag_pic) \ 166 fprintf ((FILE), "*%s@GOT(%%ebx)", xname); \ 167 else \ 168 fprintf ((FILE), "%s", xname); \ 169 } \ 170 else \ 171 { \ 172 if (xname[0] == '%') \ 173 xname += 2; \ 174 if (xname[0] == '*') \ 175 xname += 1; \ 176 else \ 177 fputs (user_label_prefix, FILE); \ 178 fputs (xname, FILE); \ 179 } \ 180} while (0) 181 182/* This is how to hack on the symbol code of certain relcalcitrant 183 symbols to modify their output in output_pic_addr_const (). */ 184 185#undef ASM_HACK_SYMBOLREF_CODE /* BDE will need to fix this. */ 186 187#undef ASM_OUTPUT_ALIGN 188#define ASM_OUTPUT_ALIGN(FILE, LOG) \ 189 do { \ 190 if ((LOG)!=0) { \ 191 if (in_text_section()) \ 192 fprintf ((FILE), "\t.p2align %d,0x90\n", (LOG)); \ 193 else \ 194 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ 195 } \ 196 } while (0) 197 198/* A C statement to output to the stdio stream FILE an assembler 199 command to advance the location counter to a multiple of 1<<LOG 200 bytes if it is within MAX_SKIP bytes. 201 202 This is used to align code labels according to Intel recommendations. */ 203 204/* XXX configuration of this is broken in the same way as HAVE_GAS_SHF_MERGE, 205 but it is easier to fix in an MD way. */ 206 207#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN 208#undef ASM_OUTPUT_MAX_SKIP_ALIGN 209#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \ 210 do { \ 211 if ((LOG) != 0) { \ 212 if ((MAX_SKIP) == 0) \ 213 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ 214 else \ 215 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \ 216 } \ 217 } while (0) 218#endif 219 220/* If defined, a C expression whose value is a string containing the 221 assembler operation to identify the following data as 222 uninitialized global data. If not defined, and neither 223 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined, 224 uninitialized global data will be output in the data section if 225 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be 226 used. */ 227#undef BSS_SECTION_ASM_OP 228#define BSS_SECTION_ASM_OP "\t.section\t.bss" 229 230/* Like `ASM_OUTPUT_BSS' except takes the required alignment as a 231 separate, explicit argument. If you define this macro, it is used 232 in place of `ASM_OUTPUT_BSS', and gives you more flexibility in 233 handling the required alignment of the variable. The alignment is 234 specified as the number of bits. 235 236 Try to use function `asm_output_aligned_bss' defined in file 237 `varasm.c' when defining this macro. */ 238#undef ASM_OUTPUT_ALIGNED_BSS 239#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 240 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) 241 242/************************[ Debugger stuff ]*********************************/ 243 244#undef DBX_REGISTER_NUMBER 245#define DBX_REGISTER_NUMBER(n) (TARGET_64BIT ? dbx64_register_map[n] \ 246 : (write_symbols == DWARF2_DEBUG \ 247 || write_symbols == DWARF_DEBUG) \ 248 ? svr4_dbx_register_map[(n)] \ 249 : dbx_register_map[(n)]) 250 251/* The same functions are used to creating the DWARF2 debug info and C++ 252 unwind info (except.c). Regardless of the debug format requested, the 253 register numbers used in exception unwinding sections still have to be 254 DWARF compatible. IMO the GCC folks may be abusing the DBX_REGISTER_NUMBER 255 macro to mean too much. */ 256#define DWARF_FRAME_REGNUM(n) (TARGET_64BIT ? dbx64_register_map[n] \ 257 : svr4_dbx_register_map[(n)]) 258 259/* stabs-in-elf has offsets relative to function beginning */ 260#undef DBX_OUTPUT_LBRAC 261#define DBX_OUTPUT_LBRAC(FILE, NAME) \ 262 do { \ 263 fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_LBRAC); \ 264 assemble_name (asmfile, buf); \ 265 fputc ('-', asmfile); \ 266 assemble_name (asmfile, \ 267 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \ 268 fprintf (asmfile, "\n"); \ 269 } while (0) 270 271#undef DBX_OUTPUT_RBRAC 272#define DBX_OUTPUT_RBRAC(FILE, NAME) \ 273 do { \ 274 fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_RBRAC); \ 275 assemble_name (asmfile, buf); \ 276 fputc ('-', asmfile); \ 277 assemble_name (asmfile, \ 278 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \ 279 fprintf (asmfile, "\n"); \ 280 } while (0) 281