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 8 This file is part of GCC. 9 10 GCC 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 GCC 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 GCC; 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 26 #define TARGET_VERSION fprintf (stderr, " (i386 FreeBSD/ELF)"); 27 28 /* Override the default comment-starter of "/". */ 29 #undef ASM_COMMENT_START 30 #define ASM_COMMENT_START "#" 31 32 #undef ASM_APP_ON 33 #define ASM_APP_ON "#APP\n" 34 35 #undef ASM_APP_OFF 36 #define ASM_APP_OFF "#NO_APP\n" 37 38 #undef DBX_REGISTER_NUMBER 39 #define DBX_REGISTER_NUMBER(n) \ 40 (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n]) 41 42 #undef NO_PROFILE_COUNTERS 43 #define NO_PROFILE_COUNTERS 1 44 45 /* Tell final.c that we don't need a label passed to mcount. */ 46 47 #undef MCOUNT_NAME 48 #define MCOUNT_NAME ".mcount" 49 50 /* Make gcc agree with <machine/ansi.h>. */ 51 52 #undef SIZE_TYPE 53 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int") 54 55 #undef PTRDIFF_TYPE 56 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int") 57 58 #undef WCHAR_TYPE_SIZE 59 #define WCHAR_TYPE_SIZE (TARGET_64BIT ? 32 : BITS_PER_WORD) 60 61 #undef SUBTARGET_EXTRA_SPECS /* i386.h bogusly defines it. */ 62 #define SUBTARGET_EXTRA_SPECS \ 63 { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER } 64 65 /* Provide a STARTFILE_SPEC appropriate for FreeBSD. Here we add 66 the magical crtbegin.o file (see crtstuff.c) which provides part 67 of the support for getting C++ file-scope static object constructed 68 before entering `main'. */ 69 70 #undef STARTFILE_SPEC 71 #define STARTFILE_SPEC \ 72 "%{!shared: \ 73 %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \ 74 %{!p:%{profile:gcrt1.o%s} \ 75 %{!profile:crt1.o%s}}}} \ 76 crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}" 77 78 /* Provide a ENDFILE_SPEC appropriate for FreeBSD. Here we tack on 79 the magical crtend.o file (see crtstuff.c) which provides part of 80 the support for getting C++ file-scope static object constructed 81 before entering `main', followed by a normal "finalizer" file, 82 `crtn.o'. */ 83 84 #undef ENDFILE_SPEC 85 #define ENDFILE_SPEC \ 86 "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s" 87 88 /* Provide a LINK_SPEC appropriate for FreeBSD. Here we provide support 89 for the special GCC options -static and -shared, which allow us to 90 link things in one of these three modes by applying the appropriate 91 combinations of options at link-time. We like to support here for 92 as many of the other GNU linker options as possible. But I don't 93 have the time to search for those flags. I am sure how to add 94 support for -soname shared_object_name. H.J. 95 96 I took out %{v:%{!V:-V}}. It is too much :-(. They can use 97 -Wl,-V. 98 99 When the -shared link option is used a final link is not being 100 done. */ 101 102 #undef LINK_SPEC 103 #define LINK_SPEC "\ 104 %{p:%nconsider using `-pg' instead of `-p' with gprof(1)} \ 105 %{Wl,*:%*} \ 106 %{v:-V} \ 107 %{assert*} %{R*} %{rpath*} %{defsym*} \ 108 %{shared:-Bshareable %{h*} %{soname*}} \ 109 %{!shared: \ 110 %{!static: \ 111 %{rdynamic:-export-dynamic} \ 112 %{!dynamic-linker:-dynamic-linker %(fbsd_dynamic_linker) }} \ 113 %{static:-Bstatic}} \ 114 %{symbolic:-Bsymbolic}" 115 116 /* A C statement to output to the stdio stream FILE an assembler 117 command to advance the location counter to a multiple of 1<<LOG 118 bytes if it is within MAX_SKIP bytes. 119 120 This is used to align code labels according to Intel recommendations. */ 121 122 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN 123 #undef ASM_OUTPUT_MAX_SKIP_ALIGN 124 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \ 125 if ((LOG) != 0) { \ 126 if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ 127 else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \ 128 } 129 #endif 130 131 /* Don't default to pcc-struct-return, we want to retain compatibility with 132 older gcc versions AND pcc-struct-return is nonreentrant. 133 (even though the SVR4 ABI for the i386 says that records and unions are 134 returned in memory). */ 135 136 #undef DEFAULT_PCC_STRUCT_RETURN 137 #define DEFAULT_PCC_STRUCT_RETURN 0 138 139 /* FreeBSD sets the rounding precision of the FPU to 53 bits. Let the 140 compiler get the contents of <float.h> and std::numeric_limits correct. */ 141 #define SUBTARGET_OVERRIDE_OPTIONS \ 142 do { \ 143 if (!TARGET_64BIT) { \ 144 REAL_MODE_FORMAT (XFmode) \ 145 = &ieee_extended_intel_96_round_53_format; \ 146 REAL_MODE_FORMAT (TFmode) \ 147 = &ieee_extended_intel_96_round_53_format; \ 148 } \ 149 } while (0) 150