1 //===--- AVR.cpp - AVR ToolChain Implementations ----------------*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "AVR.h" 10 #include "CommonArgs.h" 11 #include "clang/Driver/Compilation.h" 12 #include "clang/Driver/DriverDiagnostic.h" 13 #include "clang/Driver/InputInfo.h" 14 #include "clang/Driver/Options.h" 15 #include "llvm/ADT/StringExtras.h" 16 #include "llvm/MC/MCSubtargetInfo.h" 17 #include "llvm/MC/SubtargetFeature.h" 18 #include "llvm/Option/ArgList.h" 19 #include "llvm/Support/FileSystem.h" 20 #include "llvm/Support/Path.h" 21 22 using namespace clang::driver; 23 using namespace clang::driver::toolchains; 24 using namespace clang::driver::tools; 25 using namespace clang; 26 using namespace llvm::opt; 27 28 namespace { 29 30 // NOTE: This list has been synchronized with gcc-avr 7.3.0 and avr-libc 2.0.0. 31 constexpr struct { 32 StringRef Name; 33 StringRef SubPath; 34 StringRef Family; 35 unsigned DataAddr; 36 } MCUInfo[] = { 37 {"at90s1200", "", "avr1", 0}, 38 {"attiny11", "", "avr1", 0}, 39 {"attiny12", "", "avr1", 0}, 40 {"attiny15", "", "avr1", 0}, 41 {"attiny28", "", "avr1", 0}, 42 {"at90s2313", "tiny-stack", "avr2", 0x800060}, 43 {"at90s2323", "tiny-stack", "avr2", 0x800060}, 44 {"at90s2333", "tiny-stack", "avr2", 0x800060}, 45 {"at90s2343", "tiny-stack", "avr2", 0x800060}, 46 {"at90s4433", "tiny-stack", "avr2", 0x800060}, 47 {"attiny22", "tiny-stack", "avr2", 0x800060}, 48 {"attiny26", "tiny-stack", "avr2", 0x800060}, 49 {"at90s4414", "", "avr2", 0x800060}, 50 {"at90s4434", "", "avr2", 0x800060}, 51 {"at90s8515", "", "avr2", 0x800060}, 52 {"at90c8534", "", "avr2", 0x800060}, 53 {"at90s8535", "", "avr2", 0x800060}, 54 {"attiny13", "avr25/tiny-stack", "avr25", 0x800060}, 55 {"attiny13a", "avr25/tiny-stack", "avr25", 0x800060}, 56 {"attiny2313", "avr25/tiny-stack", "avr25", 0x800060}, 57 {"attiny2313a", "avr25/tiny-stack", "avr25", 0x800060}, 58 {"attiny24", "avr25/tiny-stack", "avr25", 0x800060}, 59 {"attiny24a", "avr25/tiny-stack", "avr25", 0x800060}, 60 {"attiny25", "avr25/tiny-stack", "avr25", 0x800060}, 61 {"attiny261", "avr25/tiny-stack", "avr25", 0x800060}, 62 {"attiny261a", "avr25/tiny-stack", "avr25", 0x800060}, 63 {"at86rf401", "avr25", "avr25", 0x800060}, 64 {"ata5272", "avr25", "avr25", 0x800100}, 65 {"ata6616c", "avr25", "avr25", 0x800100}, 66 {"attiny4313", "avr25", "avr25", 0x800060}, 67 {"attiny44", "avr25", "avr25", 0x800060}, 68 {"attiny44a", "avr25", "avr25", 0x800060}, 69 {"attiny84", "avr25", "avr25", 0x800060}, 70 {"attiny84a", "avr25", "avr25", 0x800060}, 71 {"attiny45", "avr25", "avr25", 0x800060}, 72 {"attiny85", "avr25", "avr25", 0x800060}, 73 {"attiny441", "avr25", "avr25", 0x800100}, 74 {"attiny461", "avr25", "avr25", 0x800060}, 75 {"attiny461a", "avr25", "avr25", 0x800060}, 76 {"attiny841", "avr25", "avr25", 0x800100}, 77 {"attiny861", "avr25", "avr25", 0x800060}, 78 {"attiny861a", "avr25", "avr25", 0x800060}, 79 {"attiny87", "avr25", "avr25", 0x800100}, 80 {"attiny43u", "avr25", "avr25", 0x800060}, 81 {"attiny48", "avr25", "avr25", 0x800100}, 82 {"attiny88", "avr25", "avr25", 0x800100}, 83 {"attiny828", "avr25", "avr25", 0x800100}, 84 {"at43usb355", "avr3", "avr3", 0x800100}, 85 {"at76c711", "avr3", "avr3", 0x800060}, 86 {"atmega103", "avr31", "avr31", 0x800060}, 87 {"at43usb320", "avr31", "avr31", 0x800060}, 88 {"attiny167", "avr35", "avr35", 0x800100}, 89 {"at90usb82", "avr35", "avr35", 0x800100}, 90 {"at90usb162", "avr35", "avr35", 0x800100}, 91 {"ata5505", "avr35", "avr35", 0x800100}, 92 {"ata6617c", "avr35", "avr35", 0x800100}, 93 {"ata664251", "avr35", "avr35", 0x800100}, 94 {"atmega8u2", "avr35", "avr35", 0x800100}, 95 {"atmega16u2", "avr35", "avr35", 0x800100}, 96 {"atmega32u2", "avr35", "avr35", 0x800100}, 97 {"attiny1634", "avr35", "avr35", 0x800100}, 98 {"atmega8", "avr4", "avr4", 0x800060}, 99 {"ata6289", "avr4", "avr4", 0x800100}, 100 {"atmega8a", "avr4", "avr4", 0x800060}, 101 {"ata6285", "avr4", "avr4", 0x800100}, 102 {"ata6286", "avr4", "avr4", 0x800100}, 103 {"ata6612c", "avr4", "avr4", 0x800100}, 104 {"atmega48", "avr4", "avr4", 0x800100}, 105 {"atmega48a", "avr4", "avr4", 0x800100}, 106 {"atmega48pa", "avr4", "avr4", 0x800100}, 107 {"atmega48pb", "avr4", "avr4", 0x800100}, 108 {"atmega48p", "avr4", "avr4", 0x800100}, 109 {"atmega88", "avr4", "avr4", 0x800100}, 110 {"atmega88a", "avr4", "avr4", 0x800100}, 111 {"atmega88p", "avr4", "avr4", 0x800100}, 112 {"atmega88pa", "avr4", "avr4", 0x800100}, 113 {"atmega88pb", "avr4", "avr4", 0x800100}, 114 {"atmega8515", "avr4", "avr4", 0x800060}, 115 {"atmega8535", "avr4", "avr4", 0x800060}, 116 {"atmega8hva", "avr4", "avr4", 0x800100}, 117 {"at90pwm1", "avr4", "avr4", 0x800100}, 118 {"at90pwm2", "avr4", "avr4", 0x800100}, 119 {"at90pwm2b", "avr4", "avr4", 0x800100}, 120 {"at90pwm3", "avr4", "avr4", 0x800100}, 121 {"at90pwm3b", "avr4", "avr4", 0x800100}, 122 {"at90pwm81", "avr4", "avr4", 0x800100}, 123 {"ata5702m322", "avr5", "avr5", 0x800200}, 124 {"ata5782", "avr5", "avr5", 0x800200}, 125 {"ata5790", "avr5", "avr5", 0x800100}, 126 {"ata5790n", "avr5", "avr5", 0x800100}, 127 {"ata5791", "avr5", "avr5", 0x800100}, 128 {"ata5795", "avr5", "avr5", 0x800100}, 129 {"ata5831", "avr5", "avr5", 0x800200}, 130 {"ata6613c", "avr5", "avr5", 0x800100}, 131 {"ata6614q", "avr5", "avr5", 0x800100}, 132 {"ata8210", "avr5", "avr5", 0x800200}, 133 {"ata8510", "avr5", "avr5", 0x800200}, 134 {"atmega16", "avr5", "avr5", 0x800060}, 135 {"atmega16a", "avr5", "avr5", 0x800060}, 136 {"atmega161", "avr5", "avr5", 0x800060}, 137 {"atmega162", "avr5", "avr5", 0x800100}, 138 {"atmega163", "avr5", "avr5", 0x800060}, 139 {"atmega164a", "avr5", "avr5", 0x800100}, 140 {"atmega164p", "avr5", "avr5", 0x800100}, 141 {"atmega164pa", "avr5", "avr5", 0x800100}, 142 {"atmega165", "avr5", "avr5", 0x800100}, 143 {"atmega165a", "avr5", "avr5", 0x800100}, 144 {"atmega165p", "avr5", "avr5", 0x800100}, 145 {"atmega165pa", "avr5", "avr5", 0x800100}, 146 {"atmega168", "avr5", "avr5", 0x800100}, 147 {"atmega168a", "avr5", "avr5", 0x800100}, 148 {"atmega168p", "avr5", "avr5", 0x800100}, 149 {"atmega168pa", "avr5", "avr5", 0x800100}, 150 {"atmega168pb", "avr5", "avr5", 0x800100}, 151 {"atmega169", "avr5", "avr5", 0x800100}, 152 {"atmega169a", "avr5", "avr5", 0x800100}, 153 {"atmega169p", "avr5", "avr5", 0x800100}, 154 {"atmega169pa", "avr5", "avr5", 0x800100}, 155 {"atmega32", "avr5", "avr5", 0x800060}, 156 {"atmega32a", "avr5", "avr5", 0x800060}, 157 {"atmega323", "avr5", "avr5", 0x800060}, 158 {"atmega324a", "avr5", "avr5", 0x800100}, 159 {"atmega324p", "avr5", "avr5", 0x800100}, 160 {"atmega324pa", "avr5", "avr5", 0x800100}, 161 {"atmega324pb", "avr5", "avr5", 0x800100}, 162 {"atmega325", "avr5", "avr5", 0x800100}, 163 {"atmega325a", "avr5", "avr5", 0x800100}, 164 {"atmega325p", "avr5", "avr5", 0x800100}, 165 {"atmega325pa", "avr5", "avr5", 0x800100}, 166 {"atmega3250", "avr5", "avr5", 0x800100}, 167 {"atmega3250a", "avr5", "avr5", 0x800100}, 168 {"atmega3250p", "avr5", "avr5", 0x800100}, 169 {"atmega3250pa", "avr5", "avr5", 0x800100}, 170 {"atmega328", "avr5", "avr5", 0x800100}, 171 {"atmega328p", "avr5", "avr5", 0x800100}, 172 {"atmega328pb", "avr5", "avr5", 0x800100}, 173 {"atmega329", "avr5", "avr5", 0x800100}, 174 {"atmega329a", "avr5", "avr5", 0x800100}, 175 {"atmega329p", "avr5", "avr5", 0x800100}, 176 {"atmega329pa", "avr5", "avr5", 0x800100}, 177 {"atmega3290", "avr5", "avr5", 0x800100}, 178 {"atmega3290a", "avr5", "avr5", 0x800100}, 179 {"atmega3290p", "avr5", "avr5", 0x800100}, 180 {"atmega3290pa", "avr5", "avr5", 0x800100}, 181 {"atmega406", "avr5", "avr5", 0x800100}, 182 {"atmega64", "avr5", "avr5", 0x800100}, 183 {"atmega64a", "avr5", "avr5", 0x800100}, 184 {"atmega640", "avr5", "avr5", 0x800200}, 185 {"atmega644", "avr5", "avr5", 0x800100}, 186 {"atmega644a", "avr5", "avr5", 0x800100}, 187 {"atmega644p", "avr5", "avr5", 0x800100}, 188 {"atmega644pa", "avr5", "avr5", 0x800100}, 189 {"atmega645", "avr5", "avr5", 0x800100}, 190 {"atmega645a", "avr5", "avr5", 0x800100}, 191 {"atmega645p", "avr5", "avr5", 0x800100}, 192 {"atmega649", "avr5", "avr5", 0x800100}, 193 {"atmega649a", "avr5", "avr5", 0x800100}, 194 {"atmega649p", "avr5", "avr5", 0x800100}, 195 {"atmega6450", "avr5", "avr5", 0x800100}, 196 {"atmega6450a", "avr5", "avr5", 0x800100}, 197 {"atmega6450p", "avr5", "avr5", 0x800100}, 198 {"atmega6490", "avr5", "avr5", 0x800100}, 199 {"atmega6490a", "avr5", "avr5", 0x800100}, 200 {"atmega6490p", "avr5", "avr5", 0x800100}, 201 {"atmega64rfr2", "avr5", "avr5", 0x800200}, 202 {"atmega644rfr2", "avr5", "avr5", 0x800200}, 203 {"atmega16hva", "avr5", "avr5", 0x800100}, 204 {"atmega16hva2", "avr5", "avr5", 0x800100}, 205 {"atmega16hvb", "avr5", "avr5", 0x800100}, 206 {"atmega16hvbrevb", "avr5", "avr5", 0x800100}, 207 {"atmega32hvb", "avr5", "avr5", 0x800100}, 208 {"atmega32hvbrevb", "avr5", "avr5", 0x800100}, 209 {"atmega64hve", "avr5", "avr5", 0x800100}, 210 {"atmega64hve2", "avr5", "avr5", 0x800100}, 211 {"at90can32", "avr5", "avr5", 0x800100}, 212 {"at90can64", "avr5", "avr5", 0x800100}, 213 {"at90pwm161", "avr5", "avr5", 0x800100}, 214 {"at90pwm216", "avr5", "avr5", 0x800100}, 215 {"at90pwm316", "avr5", "avr5", 0x800100}, 216 {"atmega32c1", "avr5", "avr5", 0x800100}, 217 {"atmega64c1", "avr5", "avr5", 0x800100}, 218 {"atmega16m1", "avr5", "avr5", 0x800100}, 219 {"atmega32m1", "avr5", "avr5", 0x800100}, 220 {"atmega64m1", "avr5", "avr5", 0x800100}, 221 {"atmega16u4", "avr5", "avr5", 0x800100}, 222 {"atmega32u4", "avr5", "avr5", 0x800100}, 223 {"atmega32u6", "avr5", "avr5", 0x800100}, 224 {"at90usb646", "avr5", "avr5", 0x800100}, 225 {"at90usb647", "avr5", "avr5", 0x800100}, 226 {"at90scr100", "avr5", "avr5", 0x800100}, 227 {"at94k", "avr5", "avr5", 0x800060}, 228 {"m3000", "avr5", "avr5", 0x800060}, 229 {"atmega128", "avr51", "avr51", 0x800100}, 230 {"atmega128a", "avr51", "avr51", 0x800100}, 231 {"atmega1280", "avr51", "avr51", 0x800200}, 232 {"atmega1281", "avr51", "avr51", 0x800200}, 233 {"atmega1284", "avr51", "avr51", 0x800100}, 234 {"atmega1284p", "avr51", "avr51", 0x800100}, 235 {"atmega128rfa1", "avr51", "avr51", 0x800200}, 236 {"atmega128rfr2", "avr51", "avr51", 0x800200}, 237 {"atmega1284rfr2", "avr51", "avr51", 0x800200}, 238 {"at90can128", "avr51", "avr51", 0x800200}, 239 {"at90usb1286", "avr51", "avr51", 0x800200}, 240 {"at90usb1287", "avr51", "avr51", 0x800200}, 241 {"atmega2560", "avr6", "avr6", 0x800200}, 242 {"atmega2561", "avr6", "avr6", 0x800200}, 243 {"atmega256rfr2", "avr6", "avr6", 0x800200}, 244 {"atmega2564rfr2", "avr6", "avr6", 0x800200}, 245 {"attiny4", "avrtiny", "avrtiny", 0x800040}, 246 {"attiny5", "avrtiny", "avrtiny", 0x800040}, 247 {"attiny9", "avrtiny", "avrtiny", 0x800040}, 248 {"attiny10", "avrtiny", "avrtiny", 0x800040}, 249 {"attiny20", "avrtiny", "avrtiny", 0x800040}, 250 {"attiny40", "avrtiny", "avrtiny", 0x800040}, 251 {"attiny102", "avrtiny", "avrtiny", 0x800040}, 252 {"attiny104", "avrtiny", "avrtiny", 0x800040}, 253 {"atxmega16a4", "avrxmega2", "avrxmega2", 0x802000}, 254 {"atxmega16a4u", "avrxmega2", "avrxmega2", 0x802000}, 255 {"atxmega16c4", "avrxmega2", "avrxmega2", 0x802000}, 256 {"atxmega16d4", "avrxmega2", "avrxmega2", 0x802000}, 257 {"atxmega32a4", "avrxmega2", "avrxmega2", 0x802000}, 258 {"atxmega32a4u", "avrxmega2", "avrxmega2", 0x802000}, 259 {"atxmega32c3", "avrxmega2", "avrxmega2", 0x802000}, 260 {"atxmega32c4", "avrxmega2", "avrxmega2", 0x802000}, 261 {"atxmega32d3", "avrxmega2", "avrxmega2", 0x802000}, 262 {"atxmega32d4", "avrxmega2", "avrxmega2", 0x802000}, 263 {"atxmega32e5", "avrxmega2", "avrxmega2", 0x802000}, 264 {"atxmega16e5", "avrxmega2", "avrxmega2", 0x802000}, 265 {"atxmega8e5", "avrxmega2", "avrxmega2", 0x802000}, 266 {"atxmega64a3", "avrxmega4", "avrxmega4", 0x802000}, 267 {"atxmega64a3u", "avrxmega4", "avrxmega4", 0x802000}, 268 {"atxmega64a4u", "avrxmega4", "avrxmega4", 0x802000}, 269 {"atxmega64b1", "avrxmega4", "avrxmega4", 0x802000}, 270 {"atxmega64b3", "avrxmega4", "avrxmega4", 0x802000}, 271 {"atxmega64c3", "avrxmega4", "avrxmega4", 0x802000}, 272 {"atxmega64d3", "avrxmega4", "avrxmega4", 0x802000}, 273 {"atxmega64d4", "avrxmega4", "avrxmega4", 0x802000}, 274 {"atxmega64a1", "avrxmega5", "avrxmega5", 0x802000}, 275 {"atxmega64a1u", "avrxmega5", "avrxmega5", 0x802000}, 276 {"atxmega128a3", "avrxmega6", "avrxmega6", 0x802000}, 277 {"atxmega128a3u", "avrxmega6", "avrxmega6", 0x802000}, 278 {"atxmega128b1", "avrxmega6", "avrxmega6", 0x802000}, 279 {"atxmega128b3", "avrxmega6", "avrxmega6", 0x802000}, 280 {"atxmega128c3", "avrxmega6", "avrxmega6", 0x802000}, 281 {"atxmega128d3", "avrxmega6", "avrxmega6", 0x802000}, 282 {"atxmega128d4", "avrxmega6", "avrxmega6", 0x802000}, 283 {"atxmega192a3", "avrxmega6", "avrxmega6", 0x802000}, 284 {"atxmega192a3u", "avrxmega6", "avrxmega6", 0x802000}, 285 {"atxmega192c3", "avrxmega6", "avrxmega6", 0x802000}, 286 {"atxmega192d3", "avrxmega6", "avrxmega6", 0x802000}, 287 {"atxmega256a3", "avrxmega6", "avrxmega6", 0x802000}, 288 {"atxmega256a3u", "avrxmega6", "avrxmega6", 0x802000}, 289 {"atxmega256a3b", "avrxmega6", "avrxmega6", 0x802000}, 290 {"atxmega256a3bu", "avrxmega6", "avrxmega6", 0x802000}, 291 {"atxmega256c3", "avrxmega6", "avrxmega6", 0x802000}, 292 {"atxmega256d3", "avrxmega6", "avrxmega6", 0x802000}, 293 {"atxmega384c3", "avrxmega6", "avrxmega6", 0x802000}, 294 {"atxmega384d3", "avrxmega6", "avrxmega6", 0x802000}, 295 {"atxmega128a1", "avrxmega7", "avrxmega7", 0x802000}, 296 {"atxmega128a1u", "avrxmega7", "avrxmega7", 0x802000}, 297 {"atxmega128a4u", "avrxmega7", "avrxmega7", 0x802000}, 298 {"attiny202", "avrxmega3/short-calls", "avrxmega3", 0x803F80}, 299 {"attiny204", "avrxmega3/short-calls", "avrxmega3", 0x803F80}, 300 {"attiny212", "avrxmega3/short-calls", "avrxmega3", 0x803F80}, 301 {"attiny214", "avrxmega3/short-calls", "avrxmega3", 0x803F80}, 302 {"attiny402", "avrxmega3/short-calls", "avrxmega3", 0x803F00}, 303 {"attiny404", "avrxmega3/short-calls", "avrxmega3", 0x803F00}, 304 {"attiny406", "avrxmega3/short-calls", "avrxmega3", 0x803F00}, 305 {"attiny412", "avrxmega3/short-calls", "avrxmega3", 0x803F00}, 306 {"attiny414", "avrxmega3/short-calls", "avrxmega3", 0x803F00}, 307 {"attiny416", "avrxmega3/short-calls", "avrxmega3", 0x803F00}, 308 {"attiny417", "avrxmega3/short-calls", "avrxmega3", 0x803F00}, 309 {"attiny804", "avrxmega3/short-calls", "avrxmega3", 0x803E00}, 310 {"attiny806", "avrxmega3/short-calls", "avrxmega3", 0x803E00}, 311 {"attiny807", "avrxmega3/short-calls", "avrxmega3", 0x803E00}, 312 {"attiny814", "avrxmega3/short-calls", "avrxmega3", 0x803E00}, 313 {"attiny816", "avrxmega3/short-calls", "avrxmega3", 0x803E00}, 314 {"attiny817", "avrxmega3/short-calls", "avrxmega3", 0x803E00}, 315 {"atmega808", "avrxmega3/short-calls", "avrxmega3", 0x803C00}, 316 {"atmega809", "avrxmega3/short-calls", "avrxmega3", 0x803C00}, 317 {"atmega1608", "avrxmega3", "avrxmega3", 0x803800}, 318 {"atmega1609", "avrxmega3", "avrxmega3", 0x803800}, 319 {"atmega3208", "avrxmega3", "avrxmega3", 0x803000}, 320 {"atmega3209", "avrxmega3", "avrxmega3", 0x803000}, 321 {"atmega4808", "avrxmega3", "avrxmega3", 0x802800}, 322 {"atmega4809", "avrxmega3", "avrxmega3", 0x802800}, 323 {"attiny1604", "avrxmega3", "avrxmega3", 0x803C00}, 324 {"attiny1606", "avrxmega3", "avrxmega3", 0x803C00}, 325 {"attiny1607", "avrxmega3", "avrxmega3", 0x803C00}, 326 {"attiny1614", "avrxmega3", "avrxmega3", 0x803800}, 327 {"attiny1616", "avrxmega3", "avrxmega3", 0x803800}, 328 {"attiny1617", "avrxmega3", "avrxmega3", 0x803800}, 329 {"attiny1624", "avrxmega3", "avrxmega3", 0x803800}, 330 {"attiny1626", "avrxmega3", "avrxmega3", 0x803800}, 331 {"attiny1627", "avrxmega3", "avrxmega3", 0x803800}, 332 {"attiny3216", "avrxmega3", "avrxmega3", 0x803800}, 333 {"attiny3217", "avrxmega3", "avrxmega3", 0x803800}, 334 }; 335 336 std::string GetMCUSubPath(StringRef MCUName) { 337 for (const auto &MCU : MCUInfo) 338 if (MCU.Name == MCUName) 339 return std::string(MCU.SubPath); 340 return ""; 341 } 342 343 std::optional<StringRef> GetMCUFamilyName(StringRef MCUName) { 344 for (const auto &MCU : MCUInfo) 345 if (MCU.Name == MCUName) 346 return std::optional<StringRef>(MCU.Family); 347 return std::nullopt; 348 } 349 350 std::optional<unsigned> GetMCUSectionAddressData(StringRef MCUName) { 351 for (const auto &MCU : MCUInfo) 352 if (MCU.Name == MCUName && MCU.DataAddr > 0) 353 return std::optional<unsigned>(MCU.DataAddr); 354 return std::nullopt; 355 } 356 357 const StringRef PossibleAVRLibcLocations[] = { 358 "/avr", 359 "/usr/avr", 360 "/usr/lib/avr", 361 }; 362 363 } // end anonymous namespace 364 365 /// AVR Toolchain 366 AVRToolChain::AVRToolChain(const Driver &D, const llvm::Triple &Triple, 367 const ArgList &Args) 368 : Generic_ELF(D, Triple, Args) { 369 GCCInstallation.init(Triple, Args); 370 371 if (getCPUName(D, Args, Triple).empty()) 372 D.Diag(diag::warn_drv_avr_mcu_not_specified); 373 374 // Only add default libraries if the user hasn't explicitly opted out. 375 if (!Args.hasArg(options::OPT_nostdlib) && 376 !Args.hasArg(options::OPT_nodefaultlibs) && GCCInstallation.isValid()) { 377 GCCInstallPath = GCCInstallation.getInstallPath(); 378 std::string GCCParentPath(GCCInstallation.getParentLibPath()); 379 getProgramPaths().push_back(GCCParentPath + "/../bin"); 380 } 381 } 382 383 void AVRToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs, 384 ArgStringList &CC1Args) const { 385 if (DriverArgs.hasArg(options::OPT_nostdinc) || 386 DriverArgs.hasArg(options::OPT_nostdlibinc)) 387 return; 388 389 // Omit if there is no avr-libc installed. 390 std::optional<std::string> AVRLibcRoot = findAVRLibcInstallation(); 391 if (!AVRLibcRoot) 392 return; 393 394 // Add 'avr-libc/include' to clang system include paths if applicable. 395 std::string AVRInc = *AVRLibcRoot + "/include"; 396 if (llvm::sys::fs::is_directory(AVRInc)) 397 addSystemInclude(DriverArgs, CC1Args, AVRInc); 398 } 399 400 void AVRToolChain::addClangTargetOptions( 401 const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args, 402 Action::OffloadKind DeviceOffloadKind) const { 403 // By default, use `.ctors` (not `.init_array`), as required by libgcc, which 404 // runs constructors/destructors on AVR. 405 if (!DriverArgs.hasFlag(options::OPT_fuse_init_array, 406 options::OPT_fno_use_init_array, false)) 407 CC1Args.push_back("-fno-use-init-array"); 408 // Use `-fno-use-cxa-atexit` as default, since avr-libc does not support 409 // `__cxa_atexit()`. 410 if (!DriverArgs.hasFlag(options::OPT_fuse_cxa_atexit, 411 options::OPT_fno_use_cxa_atexit, false)) 412 CC1Args.push_back("-fno-use-cxa-atexit"); 413 } 414 415 Tool *AVRToolChain::buildLinker() const { 416 return new tools::AVR::Linker(getTriple(), *this); 417 } 418 419 std::string 420 AVRToolChain::getCompilerRT(const llvm::opt::ArgList &Args, StringRef Component, 421 FileType Type = ToolChain::FT_Static) const { 422 assert(Type == ToolChain::FT_Static && "AVR only supports static libraries"); 423 // Since AVR can never be a host environment, its compiler-rt library files 424 // should always have ".a" suffix, even on windows. 425 SmallString<32> File("/libclang_rt."); 426 File += Component.str(); 427 File += ".a"; 428 // Return the default compiler-rt path appended with 429 // "avr/libclang_rt.$COMPONENT.a". 430 SmallString<256> Path(ToolChain::getCompilerRTPath()); 431 llvm::sys::path::append(Path, "avr"); 432 llvm::sys::path::append(Path, File.str()); 433 return std::string(Path.str()); 434 } 435 436 void AVR::Linker::ConstructJob(Compilation &C, const JobAction &JA, 437 const InputInfo &Output, 438 const InputInfoList &Inputs, const ArgList &Args, 439 const char *LinkingOutput) const { 440 const auto &TC = static_cast<const AVRToolChain &>(getToolChain()); 441 const Driver &D = getToolChain().getDriver(); 442 443 // Compute information about the target AVR. 444 std::string CPU = getCPUName(D, Args, getToolChain().getTriple()); 445 std::optional<StringRef> FamilyName = GetMCUFamilyName(CPU); 446 std::optional<std::string> AVRLibcRoot = TC.findAVRLibcInstallation(); 447 std::optional<unsigned> SectionAddressData = GetMCUSectionAddressData(CPU); 448 449 // Compute the linker program path, and use GNU "avr-ld" as default. 450 const Arg *A = Args.getLastArg(options::OPT_fuse_ld_EQ); 451 std::string Linker = A ? getToolChain().GetLinkerPath(nullptr) 452 : getToolChain().GetProgramPath(getShortName()); 453 454 ArgStringList CmdArgs; 455 456 CmdArgs.push_back("-o"); 457 CmdArgs.push_back(Output.getFilename()); 458 459 // Enable garbage collection of unused sections. 460 CmdArgs.push_back("--gc-sections"); 461 462 // Add library search paths before we specify libraries. 463 Args.AddAllArgs(CmdArgs, options::OPT_L); 464 getToolChain().AddFilePathLibArgs(Args, CmdArgs); 465 466 // Currently we only support libgcc and compiler-rt. 467 auto RtLib = TC.GetRuntimeLibType(Args); 468 assert( 469 (RtLib == ToolChain::RLT_Libgcc || RtLib == ToolChain::RLT_CompilerRT) && 470 "unknown runtime library"); 471 472 // Only add default libraries if the user hasn't explicitly opted out. 473 bool LinkStdlib = false; 474 if (!Args.hasArg(options::OPT_nostdlib) && 475 !Args.hasArg(options::OPT_nodefaultlibs)) { 476 if (!CPU.empty()) { 477 if (!FamilyName) { 478 // We do not have an entry for this CPU in the family 479 // mapping table yet. 480 D.Diag(diag::warn_drv_avr_family_linking_stdlibs_not_implemented) 481 << CPU; 482 } else if (!AVRLibcRoot) { 483 // No avr-libc found and so no runtime linked. 484 D.Diag(diag::warn_drv_avr_libc_not_found); 485 } else { 486 std::string SubPath = GetMCUSubPath(CPU); 487 // Add path of avr-libc. 488 CmdArgs.push_back( 489 Args.MakeArgString(Twine("-L") + *AVRLibcRoot + "/lib/" + SubPath)); 490 if (RtLib == ToolChain::RLT_Libgcc) 491 CmdArgs.push_back(Args.MakeArgString("-L" + TC.getGCCInstallPath() + 492 "/" + SubPath)); 493 LinkStdlib = true; 494 } 495 } 496 if (!LinkStdlib) 497 D.Diag(diag::warn_drv_avr_stdlib_not_linked); 498 } 499 500 if (SectionAddressData) { 501 CmdArgs.push_back(Args.MakeArgString( 502 "-Tdata=0x" + Twine::utohexstr(*SectionAddressData))); 503 } else { 504 // We do not have an entry for this CPU in the address mapping table yet. 505 D.Diag(diag::warn_drv_avr_linker_section_addresses_not_implemented) << CPU; 506 } 507 508 // If the family name is known, we can link with the device-specific libgcc. 509 // Without it, libgcc will simply not be linked. This matches avr-gcc 510 // behavior. 511 if (LinkStdlib) { 512 assert(!CPU.empty() && "CPU name must be known in order to link stdlibs"); 513 514 CmdArgs.push_back("--start-group"); 515 516 // Add the object file for the CRT. 517 std::string CrtFileName = std::string("-l:crt") + CPU + std::string(".o"); 518 CmdArgs.push_back(Args.MakeArgString(CrtFileName)); 519 520 // Link to libgcc. 521 if (RtLib == ToolChain::RLT_Libgcc) 522 CmdArgs.push_back("-lgcc"); 523 524 // Link to generic libraries of avr-libc. 525 CmdArgs.push_back("-lm"); 526 CmdArgs.push_back("-lc"); 527 528 // Add the link library specific to the MCU. 529 CmdArgs.push_back(Args.MakeArgString(std::string("-l") + CPU)); 530 531 // Add the relocatable inputs. 532 AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA); 533 534 // We directly use libclang_rt.builtins.a as input file, instead of using 535 // '-lclang_rt.builtins'. 536 if (RtLib == ToolChain::RLT_CompilerRT) { 537 std::string RtLib = 538 getToolChain().getCompilerRT(Args, "builtins", ToolChain::FT_Static); 539 if (llvm::sys::fs::exists(RtLib)) 540 CmdArgs.push_back(Args.MakeArgString(RtLib)); 541 } 542 543 CmdArgs.push_back("--end-group"); 544 545 // Add user specified linker script. 546 Args.AddAllArgs(CmdArgs, options::OPT_T); 547 548 // Specify the family name as the emulation mode to use. 549 // This is almost always required because otherwise avr-ld 550 // will assume 'avr2' and warn about the program being larger 551 // than the bare minimum supports. 552 if (Linker.find("avr-ld") != std::string::npos) 553 CmdArgs.push_back(Args.MakeArgString(std::string("-m") + *FamilyName)); 554 } else { 555 AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA); 556 } 557 558 C.addCommand(std::make_unique<Command>( 559 JA, *this, ResponseFileSupport::AtFileCurCP(), Args.MakeArgString(Linker), 560 CmdArgs, Inputs, Output)); 561 } 562 563 std::optional<std::string> AVRToolChain::findAVRLibcInstallation() const { 564 // Search avr-libc installation according to avr-gcc installation. 565 std::string GCCParent(GCCInstallation.getParentLibPath()); 566 std::string Path(GCCParent + "/avr"); 567 if (llvm::sys::fs::is_directory(Path)) 568 return Path; 569 Path = GCCParent + "/../avr"; 570 if (llvm::sys::fs::is_directory(Path)) 571 return Path; 572 573 // Search avr-libc installation from possible locations, and return the first 574 // one that exists, if there is no avr-gcc installed. 575 for (StringRef PossiblePath : PossibleAVRLibcLocations) { 576 std::string Path = getDriver().SysRoot + PossiblePath.str(); 577 if (llvm::sys::fs::is_directory(Path)) 578 return Path; 579 } 580 581 return std::nullopt; 582 } 583