1 /* Definitions for Intel 386 running FreeBSD with ELF format 2 Copyright (C) 1996-2014 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 3, 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 COPYING3. If not see 22 <http://www.gnu.org/licenses/>. */ 23 24 25 /* Override the default comment-starter of "/". */ 26 #undef ASM_COMMENT_START 27 #define ASM_COMMENT_START "#" 28 29 #undef ASM_APP_ON 30 #define ASM_APP_ON "#APP\n" 31 32 #undef ASM_APP_OFF 33 #define ASM_APP_OFF "#NO_APP\n" 34 35 #undef DBX_REGISTER_NUMBER 36 #define DBX_REGISTER_NUMBER(n) \ 37 (TARGET_64BIT ? dbx64_register_map[n] : svr4_dbx_register_map[n]) 38 39 #undef NO_PROFILE_COUNTERS 40 #define NO_PROFILE_COUNTERS 1 41 42 /* Tell final.c that we don't need a label passed to mcount. */ 43 44 #undef MCOUNT_NAME 45 #define MCOUNT_NAME ".mcount" 46 47 /* Make gcc agree with <machine/ansi.h>. */ 48 49 #undef SIZE_TYPE 50 #define SIZE_TYPE (TARGET_64BIT ? "long unsigned int" : "unsigned int") 51 52 #undef PTRDIFF_TYPE 53 #define PTRDIFF_TYPE (TARGET_64BIT ? "long int" : "int") 54 55 #undef WCHAR_TYPE_SIZE 56 #define WCHAR_TYPE_SIZE (TARGET_64BIT ? 32 : BITS_PER_WORD) 57 58 #undef SUBTARGET_EXTRA_SPECS /* i386.h bogusly defines it. */ 59 #define SUBTARGET_EXTRA_SPECS \ 60 { "fbsd_dynamic_linker", FBSD_DYNAMIC_LINKER } 61 62 /* Provide a STARTFILE_SPEC appropriate for FreeBSD. Here we add 63 the magical crtbegin.o file (see crtstuff.c) which provides part 64 of the support for getting C++ file-scope static object constructed 65 before entering `main'. */ 66 67 #undef STARTFILE_SPEC 68 #define STARTFILE_SPEC \ 69 "%{!shared: \ 70 %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \ 71 %{!p:%{profile:gcrt1.o%s} \ 72 %{!profile:crt1.o%s}}}} \ 73 crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}" 74 75 /* Provide a ENDFILE_SPEC appropriate for FreeBSD. Here we tack on 76 the magical crtend.o file (see crtstuff.c) which provides part of 77 the support for getting C++ file-scope static object constructed 78 before entering `main', followed by a normal "finalizer" file, 79 `crtn.o'. */ 80 81 #undef ENDFILE_SPEC 82 #define ENDFILE_SPEC \ 83 "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s" 84 85 /* Provide a LINK_SPEC appropriate for FreeBSD. Here we provide support 86 for the special GCC options -static and -shared, which allow us to 87 link things in one of these three modes by applying the appropriate 88 combinations of options at link-time. 89 90 When the -shared link option is used a final link is not being 91 done. */ 92 93 #undef LINK_SPEC 94 #define LINK_SPEC "\ 95 %{p:%nconsider using '-pg' instead of '-p' with gprof(1)} \ 96 %{v:-V} \ 97 %{assert*} %{R*} %{rpath*} %{defsym*} \ 98 %{shared:-Bshareable %{h*} %{soname*}} \ 99 %{!shared: \ 100 %{!static: \ 101 %{rdynamic:-export-dynamic} \ 102 -dynamic-linker %(fbsd_dynamic_linker) } \ 103 %{static:-Bstatic}} \ 104 %{symbolic:-Bsymbolic}" 105 106 /* A C statement to output to the stdio stream FILE an assembler 107 command to advance the location counter to a multiple of 1<<LOG 108 bytes if it is within MAX_SKIP bytes. 109 110 This is used to align code labels according to Intel recommendations. */ 111 112 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN 113 #undef ASM_OUTPUT_MAX_SKIP_ALIGN 114 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE, LOG, MAX_SKIP) \ 115 if ((LOG) != 0) { \ 116 if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ 117 else fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \ 118 } 119 #endif 120 121 /* Don't default to pcc-struct-return, we want to retain compatibility with 122 older gcc versions AND pcc-struct-return is nonreentrant. 123 (even though the SVR4 ABI for the i386 says that records and unions are 124 returned in memory). */ 125 126 #undef DEFAULT_PCC_STRUCT_RETURN 127 #define DEFAULT_PCC_STRUCT_RETURN 0 128 129 /* FreeBSD sets the rounding precision of the FPU to 53 bits. Let the 130 compiler get the contents of <float.h> and std::numeric_limits correct. */ 131 #undef TARGET_96_ROUND_53_LONG_DOUBLE 132 #define TARGET_96_ROUND_53_LONG_DOUBLE (!TARGET_64BIT) 133 134 /* Put all *tf routines in libgcc. */ 135 #undef LIBGCC2_HAS_TF_MODE 136 #define LIBGCC2_HAS_TF_MODE 1 137 #define LIBGCC2_TF_CEXT q 138 #define TF_SIZE 113 139 140 /* Static stack checking is supported by means of probes. */ 141 #define STACK_CHECK_STATIC_BUILTIN 1 142 143 /* Support for i386 has been removed from FreeBSD 6.0 onward. */ 144 #if FBSD_MAJOR >= 6 145 #define SUBTARGET32_DEFAULT_CPU "i486" 146 #endif 147 148 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack 149 150