1 /* Definitions for Intel 386 running FreeBSD with ELF format 2 Copyright (C) 1996-2018 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 /* Use the STARTFILE_SPEC from config/freebsd-spec.h. */ 63 64 #undef STARTFILE_SPEC 65 #define STARTFILE_SPEC FBSD_STARTFILE_SPEC 66 67 /* Use the ENDFILE_SPEC from config/freebsd-spec.h. */ 68 69 #undef ENDFILE_SPEC 70 #define ENDFILE_SPEC FBSD_ENDFILE_SPEC 71 72 /* Provide a LINK_SPEC appropriate for FreeBSD. Here we provide support 73 for the special GCC options -static and -shared, which allow us to 74 link things in one of these three modes by applying the appropriate 75 combinations of options at link-time. 76 77 When the -shared link option is used a final link is not being 78 done. */ 79 80 #undef LINK_SPEC 81 #define LINK_SPEC "\ 82 %{p:%nconsider using '-pg' instead of '-p' with gprof(1)} \ 83 %{v:-V} \ 84 %{assert*} %{R*} %{rpath*} %{defsym*} \ 85 %{shared:-Bshareable %{h*} %{soname*}} \ 86 %{!shared: \ 87 %{!static: \ 88 %{rdynamic:-export-dynamic} \ 89 -dynamic-linker %(fbsd_dynamic_linker) } \ 90 %{static:-Bstatic}} \ 91 %{symbolic:-Bsymbolic}" 92 93 /* A C statement to output to the stdio stream FILE an assembler 94 command to advance the location counter to a multiple of 1<<LOG 95 bytes if it is within MAX_SKIP bytes. 96 97 This is used to align code labels according to Intel recommendations. */ 98 99 #ifdef HAVE_GAS_MAX_SKIP_P2ALIGN 100 #undef ASM_OUTPUT_MAX_SKIP_ALIGN 101 #define ASM_OUTPUT_MAX_SKIP_ALIGN(FILE,LOG,MAX_SKIP) \ 102 do { \ 103 if ((LOG) != 0) { \ 104 if ((MAX_SKIP) == 0) fprintf ((FILE), "\t.p2align %d\n", (LOG)); \ 105 else { \ 106 fprintf ((FILE), "\t.p2align %d,,%d\n", (LOG), (MAX_SKIP)); \ 107 /* Make sure that we have at least 8 byte alignment if > 8 byte \ 108 alignment is preferred. */ \ 109 if ((LOG) > 3 \ 110 && (1 << (LOG)) > ((MAX_SKIP) + 1) \ 111 && (MAX_SKIP) >= 7) \ 112 fputs ("\t.p2align 3\n", (FILE)); \ 113 } \ 114 } \ 115 } while (0) 116 #endif 117 118 /* Don't default to pcc-struct-return, we want to retain compatibility with 119 older gcc versions AND pcc-struct-return is nonreentrant. 120 (even though the SVR4 ABI for the i386 says that records and unions are 121 returned in memory). */ 122 123 #undef DEFAULT_PCC_STRUCT_RETURN 124 #define DEFAULT_PCC_STRUCT_RETURN 0 125 126 /* FreeBSD sets the rounding precision of the FPU to 53 bits. Let the 127 compiler get the contents of <float.h> and std::numeric_limits correct. */ 128 #undef TARGET_96_ROUND_53_LONG_DOUBLE 129 #define TARGET_96_ROUND_53_LONG_DOUBLE (!TARGET_64BIT) 130 131 /* Static stack checking is supported by means of probes. */ 132 #define STACK_CHECK_STATIC_BUILTIN 1 133 134 #define SUBTARGET32_DEFAULT_CPU "i586" 135 136 #define TARGET_ASM_FILE_END file_end_indicate_exec_stack 137 138