1 /* Definitions of target machine for GCC, 2 for ARM with targeting the VXWorks run time environment. 3 Copyright (C) 1999-2020 Free Software Foundation, Inc. 4 5 Contributed by: Mike Stump <mrs@wrs.com> 6 Brought up to date by CodeSourcery, LLC. 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 Under Section 7 of GPL version 3, you are granted additional 21 permissions described in the GCC Runtime Library Exception, version 22 3.1, as published by the Free Software Foundation. 23 24 You should have received a copy of the GNU General Public License and 25 a copy of the GCC Runtime Library Exception along with this program; 26 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 27 <http://www.gnu.org/licenses/>. */ 28 29 /* TARGET_OS_CPP_BUILTINS, down to BPABI if defined. */ 30 31 #if defined (TARGET_BPABI_CPP_BUILTINS) 32 #define MAYBE_TARGET_BPABI_CPP_BUILTINS TARGET_BPABI_CPP_BUILTINS 33 #else 34 #define MAYBE_TARGET_BPABI_CPP_BUILTINS() 35 #endif 36 37 #undef TARGET_OS_CPP_BUILTINS 38 #define TARGET_OS_CPP_BUILTINS() \ 39 do { \ 40 if (TARGET_BIG_END) \ 41 builtin_define ("ARMEB"); \ 42 else \ 43 builtin_define ("ARMEL"); \ 44 \ 45 if (arm_arch_xscale) \ 46 builtin_define ("_VX_CPU=XSCALE"); \ 47 if (arm_arch8) \ 48 builtin_define ("_VX_CPU=ARMARCH8A"); \ 49 else if (arm_arch7) \ 50 { \ 51 if (!arm_arch_notm) \ 52 builtin_define ("_VX_CPU=ARMARCH7M"); \ 53 else if (TARGET_THUMB) \ 54 builtin_define ("_VX_CPU=ARMARCH7_T2"); \ 55 else \ 56 builtin_define ("_VX_CPU=ARMARCH7"); \ 57 } \ 58 else if (arm_arch6) \ 59 { \ 60 if (TARGET_THUMB) \ 61 builtin_define ("_VX_CPU=ARMARCH6_T"); \ 62 else \ 63 builtin_define ("_VX_CPU=ARMARCH6"); \ 64 } \ 65 else if (arm_arch5t) \ 66 builtin_define ("_VX_CPU=ARMARCH5_T"); \ 67 else if (arm_arch4) \ 68 { \ 69 if (TARGET_THUMB) \ 70 builtin_define ("_VX_CPU=ARMARCH4_T"); \ 71 else \ 72 builtin_define ("_VX_CPU=ARMARCH4"); \ 73 } \ 74 VXWORKS_OS_CPP_BUILTINS (); \ 75 MAYBE_TARGET_BPABI_CPP_BUILTINS (); \ 76 } while (0) 77 78 #undef SUBTARGET_OVERRIDE_OPTIONS 79 #define SUBTARGET_OVERRIDE_OPTIONS VXWORKS_OVERRIDE_OPTIONS 80 81 /* Subsume the arm/elf.h definition, and add RTP hooks. */ 82 #undef SUBTARGET_CPP_SPEC 83 #define SUBTARGET_CPP_SPEC "-D__ELF__" VXWORKS_ADDITIONAL_CPP_SPEC 84 85 /* .text.hot and .text.unlikely sections are badly handled by the 86 VxWorks kernel mode loader for ARM style exceptions. */ 87 #undef CC1_SPEC 88 #define CC1_SPEC VXWORKS_CC1_SPEC " %{!mrtp:-fno-reorder-functions}" 89 90 /* Translate an explicit -mbig-endian as an explicit -EB to assembler 91 and linker, and pass abi options matching the target expectations 92 or command-line requests. */ 93 #define VXWORKS_ENDIAN_SPEC "%{mbig-endian:-EB}" 94 95 #if defined (TARGET_BPABI_CPP_BUILTINS) 96 #define MAYBE_ASM_ABI_SPEC \ 97 "%{mabi=apcs-gnu|mabi=atpcs:-meabi=gnu;:-meabi=5}" TARGET_FIX_V4BX_SPEC 98 #else 99 #define MAYBE_ASM_ABI_SPEC 100 #endif 101 102 #undef SUBTARGET_EXTRA_ASM_SPEC 103 #define SUBTARGET_EXTRA_ASM_SPEC MAYBE_ASM_ABI_SPEC " " VXWORKS_ENDIAN_SPEC 104 105 #undef LINK_SPEC 106 #define LINK_SPEC VXWORKS_LINK_SPEC " " VXWORKS_ENDIAN_SPEC 107 108 #undef LIB_SPEC 109 #define LIB_SPEC VXWORKS_LIB_SPEC 110 111 #undef STARTFILE_SPEC 112 #define STARTFILE_SPEC VXWORKS_STARTFILE_SPEC 113 114 #undef ENDFILE_SPEC 115 #define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC 116 117 /* There is no default multilib. */ 118 #undef MULTILIB_DEFAULTS 119 120 #undef FUNCTION_PROFILER 121 #define FUNCTION_PROFILER VXWORKS_FUNCTION_PROFILER 122 123 /* We want to be compatible with a version of "2.96" at one point in 124 the past before this macro was changed. */ 125 #undef DEFAULT_STRUCTURE_SIZE_BOUNDARY 126 #define DEFAULT_STRUCTURE_SIZE_BOUNDARY 8 127 128 /* The kernel loader does not allow relocations to overflow, so we 129 cannot allow arbitrary relocation addends in kernel modules or RTP 130 executables. Also, the dynamic loader uses the resolved relocation 131 value to distinguish references to the text and data segments, so we 132 cannot allow arbitrary offsets for shared libraries either. */ 133 #undef ARM_OFFSETS_MUST_BE_WITHIN_SECTIONS_P 134 #define ARM_OFFSETS_MUST_BE_WITHIN_SECTIONS_P 1 135 136 #undef TARGET_DEFAULT_WORD_RELOCATIONS 137 #define TARGET_DEFAULT_WORD_RELOCATIONS 1 138 139 /* Define this to be nonzero if static stack checking is supported. */ 140 #define STACK_CHECK_STATIC_BUILTIN 1 141 142 /* This platform supports the probing method of stack checking (RTP mode). 143 8K is reserved in the stack to propagate exceptions in case of overflow. */ 144 #define STACK_CHECK_PROTECT 8192 145 146 /* Unless overridded by the target options, the default is little-endian. */ 147 #define TARGET_ENDIAN_DEFAULT 0 148 149 /* The VxWorks environment on ARM is llvm based and we need to link 150 against libllvm.a to resolve __aeabi_memcpy4. */ 151 152 #undef VXWORKS_PERSONALITY 153 #define VXWORKS_PERSONALITY "llvm" 154 155 #undef VXWORKS_EXTRA_LIBS_RTP 156 #define VXWORKS_EXTRA_LIBS_RTP "-lllvm" 157