1 /* Common VxWorks target definitions for GNU compiler. 2 Copyright (C) 1999-2014 Free Software Foundation, Inc. 3 Contributed by Wind River Systems. 4 Rewritten by CodeSourcery, LLC. 5 6 This file is part of GCC. 7 8 GCC is free software; you can redistribute it and/or modify it under 9 the terms of the GNU General Public License as published by the Free 10 Software Foundation; either version 3, or (at your option) any later 11 version. 12 13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY 14 WARRANTY; without even the implied warranty of MERCHANTABILITY or 15 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16 for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with GCC; see the file COPYING3. If not see 20 <http://www.gnu.org/licenses/>. */ 21 22 /* Assert that we are targeting VxWorks. */ 23 #undef TARGET_VXWORKS 24 #define TARGET_VXWORKS 1 25 26 /* In kernel mode, VxWorks provides all the libraries itself, as well as 27 the functionality of startup files, etc. In RTP mode, it behaves more 28 like a traditional Unix, with more external files. Most of our specs 29 must be aware of the difference. */ 30 31 /* We look for the VxWorks header files using the environment 32 variables that are set in VxWorks to indicate the location of the 33 system header files. We use -idirafter so that the GCC's own 34 header-file directories (containing <stddef.h>, etc.) come before 35 the VxWorks system header directories. */ 36 37 /* Since we provide a default -isystem, expand -isystem on the command 38 line early. */ 39 #undef VXWORKS_ADDITIONAL_CPP_SPEC 40 #define VXWORKS_ADDITIONAL_CPP_SPEC \ 41 "%{!nostdinc: \ 42 %{isystem*} -idirafter \ 43 %{mrtp: %:getenv(WIND_USR /h) \ 44 ;: %:getenv(WIND_BASE /target/h)}}" 45 46 /* The references to __init and __fini will be satisfied by 47 libc_internal.a. */ 48 #undef VXWORKS_LIB_SPEC 49 #define VXWORKS_LIB_SPEC \ 50 "%{mrtp:%{shared:-u " USER_LABEL_PREFIX "__init -u " USER_LABEL_PREFIX "__fini} \ 51 %{!shared:%{non-static:-u " USER_LABEL_PREFIX "_STI__6__rtld -ldl} \ 52 --start-group -lc -lgcc -lc_internal -lnet -ldsi \ 53 --end-group}}" 54 55 /* The no-op spec for "-shared" below is present because otherwise GCC 56 will treat it as an unrecognized option. */ 57 #undef VXWORKS_LINK_SPEC 58 #define VXWORKS_LINK_SPEC \ 59 "%{!mrtp:-r} \ 60 %{!shared: \ 61 %{mrtp:-q %{h*} \ 62 %{R*} %{!T*: %(link_start) } \ 63 %(link_target) %(link_os)}} \ 64 %{v:-v} \ 65 %{shared:-shared} \ 66 %{Bstatic:-Bstatic} \ 67 %{Bdynamic:-Bdynamic} \ 68 %{!Xbind-lazy:-z now} \ 69 %{Xbind-now:%{Xbind-lazy: \ 70 %e-Xbind-now and -Xbind-lazy are incompatible}} \ 71 %{mrtp:%{!shared:%{!non-static:-static} \ 72 %{non-static:--force-dynamic --export-dynamic}}}" 73 74 /* For VxWorks, the system provides libc_internal.a. This is a superset 75 of libgcc.a; we want to use it. Make sure not to dynamically export 76 any of its symbols, though. Always look for libgcc.a first so that 77 we get the latest versions of the GNU intrinsics during our builds. */ 78 #undef VXWORKS_LIBGCC_SPEC 79 #define VXWORKS_LIBGCC_SPEC \ 80 "-lgcc %{mrtp:--exclude-libs=libc_internal,libgcc -lc_internal}" 81 82 #undef VXWORKS_STARTFILE_SPEC 83 #define VXWORKS_STARTFILE_SPEC "%{mrtp:%{!shared:-l:crt0.o}}" 84 #define VXWORKS_ENDFILE_SPEC "" 85 86 /* Do VxWorks-specific parts of TARGET_OPTION_OVERRIDE. */ 87 #undef VXWORKS_OVERRIDE_OPTIONS 88 #define VXWORKS_OVERRIDE_OPTIONS vxworks_override_options () 89 extern void vxworks_override_options (void); 90 91 /* Only RTPs support prioritized constructors and destructors: 92 the implementation relies on numbered .ctors* sections. */ 93 #define SUPPORTS_INIT_PRIORITY TARGET_VXWORKS_RTP 94 95 /* VxWorks requires special handling of constructors and destructors. 96 All VxWorks configurations must use these functions. */ 97 #undef TARGET_ASM_CONSTRUCTOR 98 #define TARGET_ASM_CONSTRUCTOR vxworks_asm_out_constructor 99 #undef TARGET_ASM_DESTRUCTOR 100 #define TARGET_ASM_DESTRUCTOR vxworks_asm_out_destructor 101 extern void vxworks_asm_out_constructor (rtx symbol, int priority); 102 extern void vxworks_asm_out_destructor (rtx symbol, int priority); 103 104 /* Override the vxworks-dummy.h definitions. TARGET_VXWORKS_RTP 105 is defined by vxworks.opt. */ 106 #undef VXWORKS_GOTT_BASE 107 #define VXWORKS_GOTT_BASE "__GOTT_BASE__" 108 #undef VXWORKS_GOTT_INDEX 109 #define VXWORKS_GOTT_INDEX "__GOTT_INDEX__" 110 111 #undef PTRDIFF_TYPE 112 #define PTRDIFF_TYPE "int" 113 114 #undef SIZE_TYPE 115 #define SIZE_TYPE "unsigned int" 116 117 #undef TARGET_LIBC_HAS_FUNCTION 118 #define TARGET_LIBC_HAS_FUNCTION no_c99_libc_has_function 119 120 /* Both kernels and RTPs have the facilities required by this macro. */ 121 #define TARGET_POSIX_IO 122 123 /* A VxWorks implementation of TARGET_OS_CPP_BUILTINS. */ 124 #define VXWORKS_OS_CPP_BUILTINS() \ 125 do \ 126 { \ 127 builtin_define ("__vxworks"); \ 128 builtin_define ("__VXWORKS__"); \ 129 builtin_assert ("system=unix"); \ 130 if (TARGET_VXWORKS_RTP) \ 131 builtin_define ("__RTP__"); \ 132 else \ 133 builtin_define ("_WRS_KERNEL"); \ 134 } \ 135 while (0) 136 137 #define VXWORKS_KIND VXWORKS_KIND_NORMAL 138 139 /* The diab linker does not handle .gnu_attribute sections. */ 140 #undef HAVE_AS_GNU_ATTRIBUTE 141