1 /* Definitions of target machine for GCC, 2 for ARM with targeting the VXWorks run time environment. 3 Copyright (C) 1999-2018 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 ("CPU=XSCALE"); \ 47 else if (arm_arch7) \ 48 { \ 49 if (!arm_arch_notm) \ 50 builtin_define ("CPU=ARMARCH7M"); \ 51 else if (TARGET_THUMB) \ 52 builtin_define ("CPU=ARMARCH7_T2"); \ 53 else \ 54 builtin_define ("CPU=ARMARCH7"); \ 55 } \ 56 else if (arm_arch6) \ 57 { \ 58 if (TARGET_THUMB) \ 59 builtin_define ("CPU=ARMARCH6_T"); \ 60 else \ 61 builtin_define ("CPU=ARMARCH6"); \ 62 } \ 63 else if (arm_arch5) \ 64 { \ 65 if (TARGET_THUMB) \ 66 builtin_define ("CPU=ARMARCH5_T"); \ 67 else \ 68 builtin_define ("CPU=ARMARCH5"); \ 69 } \ 70 else if (arm_arch4) \ 71 { \ 72 if (TARGET_THUMB) \ 73 builtin_define ("CPU=ARMARCH4_T"); \ 74 else \ 75 builtin_define ("CPU=ARMARCH4"); \ 76 } \ 77 VXWORKS_OS_CPP_BUILTINS (); \ 78 MAYBE_TARGET_BPABI_CPP_BUILTINS (); \ 79 } while (0) 80 81 #undef SUBTARGET_OVERRIDE_OPTIONS 82 #define SUBTARGET_OVERRIDE_OPTIONS VXWORKS_OVERRIDE_OPTIONS 83 84 /* Subsume the arm/elf.h definition, and add RTP hooks. */ 85 #undef SUBTARGET_CPP_SPEC 86 #define SUBTARGET_CPP_SPEC "-D__ELF__" VXWORKS_ADDITIONAL_CPP_SPEC 87 88 /* .text.hot and .text.unlikely sections are badly handled by the 89 VxWorks kernel mode loader for ARM style exceptions. */ 90 91 #if ARM_UNWIND_INFO 92 #define EXTRA_CC1_SPEC "%{!mrtp:-fno-reorder-functions}" 93 #else 94 #define EXTRA_CC1_SPEC 95 #endif 96 97 #undef CC1_SPEC 98 #define CC1_SPEC "" EXTRA_CC1_SPEC 99 100 /* Translate an explicit -mbig-endian as an explicit -EB to assembler 101 and linker, and pass abi options matching the target expectations 102 or command-line requests. */ 103 #define VXWORKS_ENDIAN_SPEC "%{mbig-endian:-EB}" 104 105 #if defined (TARGET_BPABI_CPP_BUILTINS) 106 #define MAYBE_ASM_ABI_SPEC \ 107 "%{mabi=apcs-gnu|mabi=atpcs:-meabi=gnu;:-meabi=5}" TARGET_FIX_V4BX_SPEC 108 #else 109 #define MAYBE_ASM_ABI_SPEC 110 #endif 111 112 #undef SUBTARGET_EXTRA_ASM_SPEC 113 #define SUBTARGET_EXTRA_ASM_SPEC MAYBE_ASM_ABI_SPEC " " VXWORKS_ENDIAN_SPEC 114 115 #undef LINK_SPEC 116 #define LINK_SPEC VXWORKS_LINK_SPEC " " VXWORKS_ENDIAN_SPEC 117 118 #undef LIB_SPEC 119 #define LIB_SPEC VXWORKS_LIB_SPEC 120 121 #undef STARTFILE_SPEC 122 #define STARTFILE_SPEC VXWORKS_STARTFILE_SPEC 123 124 #undef ENDFILE_SPEC 125 #define ENDFILE_SPEC VXWORKS_ENDFILE_SPEC 126 127 /* For exceptions, pre VX7 uses DWARF2 info, VX7 uses ARM unwinding. */ 128 #undef DWARF2_UNWIND_INFO 129 #define DWARF2_UNWIND_INFO (!TARGET_VXWORKS7) 130 131 #undef ARM_TARGET2_DWARF_FORMAT 132 #define ARM_TARGET2_DWARF_FORMAT \ 133 (TARGET_VXWORKS_RTP ? DW_EH_PE_pcrel : DW_EH_PE_absptr) 134 135 /* There is no default multilib. */ 136 #undef MULTILIB_DEFAULTS 137 138 #undef FUNCTION_PROFILER 139 #define FUNCTION_PROFILER VXWORKS_FUNCTION_PROFILER 140 141 /* We want to be compatible with a version of "2.96" at one point in 142 the past before this macro was changed. */ 143 #undef DEFAULT_STRUCTURE_SIZE_BOUNDARY 144 #define DEFAULT_STRUCTURE_SIZE_BOUNDARY 8 145 146 /* The kernel loader does not allow relocations to overflow, so we 147 cannot allow arbitrary relocation addends in kernel modules or RTP 148 executables. Also, the dynamic loader uses the resolved relocation 149 value to distinguish references to the text and data segments, so we 150 cannot allow arbitrary offsets for shared libraries either. */ 151 #undef ARM_OFFSETS_MUST_BE_WITHIN_SECTIONS_P 152 #define ARM_OFFSETS_MUST_BE_WITHIN_SECTIONS_P 1 153 154 #undef TARGET_DEFAULT_WORD_RELOCATIONS 155 #define TARGET_DEFAULT_WORD_RELOCATIONS 1 156 157 /* Define this to be nonzero if static stack checking is supported. */ 158 #define STACK_CHECK_STATIC_BUILTIN 1 159 160 /* This platform supports the probing method of stack checking (RTP mode). 161 8K is reserved in the stack to propagate exceptions in case of overflow. */ 162 #define STACK_CHECK_PROTECT 8192 163 164 /* Unless overridded by the target options, the default is little-endian. */ 165 #define TARGET_ENDIAN_DEFAULT 0 166