1/* Definitions for Intel 386 running FreeBSD with ELF format 2 Copyright (C) 1996, 2000, 2002, 2004 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, 51 Franklin Street, Fifth Floor, 23Boston, MA 02110-1301, USA. */ 24 25/* $FreeBSD$ */ 26 27#undef CC1_SPEC 28#define CC1_SPEC "%(cc1_cpu) %{profile:-p}" 29 30/* Provide a LINK_SPEC appropriate for FreeBSD. Here we provide support 31 for the special GCC options -static and -shared, which allow us to 32 link things in one of these three modes by applying the appropriate 33 combinations of options at link-time. We like to support here for 34 as many of the other GNU linker options as possible. But I don't 35 have the time to search for those flags. I am sure how to add 36 support for -soname shared_object_name. H.J. 37 38 When the -shared link option is used a final link is not being 39 done. */ 40 41#undef LINK_SPEC 42#define LINK_SPEC "\ 43 %{p:%nconsider using `-pg' instead of `-p' with gprof(1) } \ 44 %{v:-V} \ 45 %{assert*} %{R*} %{rpath*} %{defsym*} \ 46 %{shared:-Bshareable %{h*} %{soname*}} \ 47 %{!shared: \ 48 %{!static: \ 49 %{rdynamic: -export-dynamic} \ 50 %{!dynamic-linker:-dynamic-linker %(fbsd_dynamic_linker) }} \ 51 %{static:-Bstatic}} \ 52 %{!static:--hash-style=both --enable-new-dtags} \ 53 %{symbolic:-Bsymbolic}" 54 55/* Reset our STARTFILE_SPEC which was properly set in config/freebsd.h 56 but trashed by config/<cpu>/<file.h>. */ 57 58#undef STARTFILE_SPEC 59#define STARTFILE_SPEC FBSD_STARTFILE_SPEC 60 61/* Provide an ENDFILE_SPEC appropriate for FreeBSD/i386. */ 62 63#undef ENDFILE_SPEC 64#define ENDFILE_SPEC FBSD_ENDFILE_SPEC 65 66 67/************************[ Target stuff ]***********************************/ 68 69/* Define the actual types of some ANSI-mandated types. 70 Needs to agree with <machine/ansi.h>. GCC defaults come from c-decl.c, 71 c-common.c, and config/<arch>/<arch>.h. */ 72 73#undef SIZE_TYPE 74#define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int") 75 76#undef PTRDIFF_TYPE 77#define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int") 78 79#undef WCHAR_TYPE_SIZE 80#define WCHAR_TYPE_SIZE (TARGET_64BIT ? 32 : BITS_PER_WORD) 81 82#undef SUBTARGET_EXTRA_SPECS /* i386.h bogusly defines it. */ 83#define SUBTARGET_EXTRA_SPECS \ 84 { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER } 85 86#define TARGET_VERSION fprintf (stderr, " (i386 FreeBSD/ELF)"); 87 88#define TARGET_ELF 1 89 90/* Don't default to pcc-struct-return, we want to retain compatibility with 91 older gcc versions AND pcc-struct-return is nonreentrant. 92 (even though the SVR4 ABI for the i386 says that records and unions are 93 returned in memory). */ 94 95#undef DEFAULT_PCC_STRUCT_RETURN 96#define DEFAULT_PCC_STRUCT_RETURN 0 97 98/* FreeBSD sets the rounding precision of the FPU to 53 bits. Let the 99 compiler get the contents of <float.h> and std::numeric_limits correct. */ 100#undef TARGET_96_ROUND_53_LONG_DOUBLE 101#define TARGET_96_ROUND_53_LONG_DOUBLE (!TARGET_64BIT) 102 103/* Tell final.c that we don't need a label passed to mcount. */ 104#define NO_PROFILE_COUNTERS 1 105 106/* Output assembler code to FILE to begin profiling of the current function. 107 LABELNO is an optional label. */ 108 109#undef MCOUNT_NAME 110#define MCOUNT_NAME ".mcount" 111 112/* Output assembler code to FILE to end profiling of the current function. */ 113 114#undef FUNCTION_PROFILER_EPILOGUE /* BDE will need to fix this. */ 115 116 117/************************[ Assembler stuff ]********************************/ 118 119/* Override the default comment-starter of "/" from unix.h. */ 120#undef ASM_COMMENT_START 121#define ASM_COMMENT_START "#" 122 123/* Override the default comment-starter of "/APP" from unix.h. */ 124#undef ASM_APP_ON 125#define ASM_APP_ON "#APP\n" 126#undef ASM_APP_OFF 127#define ASM_APP_OFF "#NO_APP\n" 128 129/* XXX:DEO do we still need this override to defaults.h ?? */ 130/* This is how to output a reference to a user-level label named NAME. */ 131#undef ASM_OUTPUT_LABELREF 132#define ASM_OUTPUT_LABELREF(FILE, NAME) \ 133 do { \ 134 const char *xname = (NAME); \ 135 /* Hack to avoid writing lots of rtl in \ 136 FUNCTION_PROFILER_EPILOGUE (). */ \ 137 if (*xname == '.' && strcmp(xname + 1, "mexitcount") == 0) \ 138 { \ 139 if (flag_pic) \ 140 fprintf ((FILE), "*%s@GOT(%%ebx)", xname); \ 141 else \ 142 fprintf ((FILE), "%s", xname); \ 143 } \ 144 else \ 145 { \ 146 if (xname[0] == '%') \ 147 xname += 2; \ 148 if (xname[0] == '*') \ 149 xname += 1; \ 150 else \ 151 fputs (user_label_prefix, FILE); \ 152 fputs (xname, FILE); \ 153 } \ 154} while (0) 155 156/* This is how to hack on the symbol code of certain relcalcitrant 157 symbols to modify their output in output_pic_addr_const (). */ 158 159#undef ASM_HACK_SYMBOLREF_CODE /* BDE will need to fix this. */ 160 161/* A C statement to output to the stdio stream FILE an assembler 162 command to advance the location counter to a multiple of 1<<LOG 163 bytes if it is within MAX_SKIP bytes. 164 165 This is used to align code labels according to Intel recommendations. */ 166 167/* XXX configuration of this is broken in the same way as HAVE_GAS_SHF_MERGE, 168 but it is easier to fix in an MD way. */ 169 170#ifdef HAVE_GAS_MAX_SKIP_P2ALIGN 171#undef ASM_OUTPUT_MAX_SKIP_ALIGN 172#define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \ 173 do { \ 174 if ((LOG) != 0) { \ 175 if ((MAX_SKIP) == 0) \ 176 fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ 177 else \ 178 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \ 179 } \ 180 } while (0) 181#endif 182 183/* If defined, a C expression whose value is a string containing the 184 assembler operation to identify the following data as 185 uninitialized global data. If not defined, and neither 186 `ASM_OUTPUT_BSS' nor `ASM_OUTPUT_ALIGNED_BSS' are defined, 187 uninitialized global data will be output in the data section if 188 `-fno-common' is passed, otherwise `ASM_OUTPUT_COMMON' will be 189 used. */ 190#undef BSS_SECTION_ASM_OP 191#define BSS_SECTION_ASM_OP "\t.section\t.bss" 192 193/* Like `ASM_OUTPUT_BSS' except takes the required alignment as a 194 separate, explicit argument. If you define this macro, it is used 195 in place of `ASM_OUTPUT_BSS', and gives you more flexibility in 196 handling the required alignment of the variable. The alignment is 197 specified as the number of bits. 198 199 Try to use function `asm_output_aligned_bss' defined in file 200 `varasm.c' when defining this macro. */ 201#undef ASM_OUTPUT_ALIGNED_BSS 202#define ASM_OUTPUT_ALIGNED_BSS(FILE, DECL, NAME, SIZE, ALIGN) \ 203 asm_output_aligned_bss (FILE, DECL, NAME, SIZE, ALIGN) 204 205/************************[ Debugger stuff ]*********************************/ 206 207#undef DBX_REGISTER_NUMBER 208#define DBX_REGISTER_NUMBER(n) (TARGET_64BIT ? dbx64_register_map[n] \ 209 : (write_symbols == DWARF2_DEBUG) \ 210 ? svr4_dbx_register_map[(n)] \ 211 : dbx_register_map[(n)]) 212 213/* The same functions are used to creating the DWARF2 debug info and C++ 214 unwind info (except.c). Regardless of the debug format requested, the 215 register numbers used in exception unwinding sections still have to be 216 DWARF compatible. IMO the GCC folks may be abusing the DBX_REGISTER_NUMBER 217 macro to mean too much. */ 218#define DWARF_FRAME_REGNUM(n) (TARGET_64BIT ? dbx64_register_map[n] \ 219 : svr4_dbx_register_map[(n)]) 220 221/* stabs-in-elf has offsets relative to function beginning */ 222#undef DBX_OUTPUT_LBRAC 223#define DBX_OUTPUT_LBRAC(FILE, NAME) \ 224 do { \ 225 fprintf (asm_out_file, "%s %d,0,0,", ASM_STABN_OP, N_LBRAC); \ 226 assemble_name (asm_out_file, NAME); \ 227 fputc ('-', asm_out_file); \ 228 assemble_name (asm_out_file, \ 229 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \ 230 fprintf (asm_out_file, "\n"); \ 231 } while (0) 232 233#undef DBX_OUTPUT_RBRAC 234#define DBX_OUTPUT_RBRAC(FILE, NAME) \ 235 do { \ 236 fprintf (asm_out_file, "%s %d,0,0,", ASM_STABN_OP, N_RBRAC); \ 237 assemble_name (asm_out_file, NAME); \ 238 fputc ('-', asm_out_file); \ 239 assemble_name (asm_out_file, \ 240 XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0)); \ 241 fprintf (asm_out_file, "\n"); \ 242 } while (0) 243 244#undef NEED_INDICATE_EXEC_STACK 245#define NEED_INDICATE_EXEC_STACK 1 246