clang/lib/Driver/ToolChains/AVR.cpp

   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/Optional.h"
  16 #include "llvm/ADT/StringExtras.h"
  17 #include "llvm/MC/MCSubtargetInfo.h"
  18 #include "llvm/MC/SubtargetFeature.h"
  19 #include "llvm/Option/ArgList.h"
  20 #include "llvm/Support/FileSystem.h"
  21 #include "llvm/Support/Path.h"
  22
  23 using namespace clang::driver;
  24 using namespace clang::driver::toolchains;
  25 using namespace clang::driver::tools;
  26 using namespace clang;
  27 using namespace llvm::opt;
  28
  29 namespace {
  30
  31 // NOTE: This list has been synchronized with gcc-avr 7.3.0 and avr-libc 2.0.0.
  32 constexpr struct {
  33   StringRef Name;
  34   StringRef SubPath;
  35   StringRef Family;
  36   unsigned DataAddr;
  37 } MCUInfo[] = {
  38     {"at90s1200", "", "avr1", 0},
  39     {"attiny11", "", "avr1", 0},
  40     {"attiny12", "", "avr1", 0},
  41     {"attiny15", "", "avr1", 0},
  42     {"attiny28", "", "avr1", 0},
  43     {"at90s2313", "tiny-stack", "avr2", 0x800060},
  44     {"at90s2323", "tiny-stack", "avr2", 0x800060},
  45     {"at90s2333", "tiny-stack", "avr2", 0x800060},
  46     {"at90s2343", "tiny-stack", "avr2", 0x800060},
  47     {"at90s4433", "tiny-stack", "avr2", 0x800060},
  48     {"attiny22", "tiny-stack", "avr2", 0x800060},
  49     {"attiny26", "tiny-stack", "avr2", 0x800060},
  50     {"at90s4414", "", "avr2", 0x800060},
  51     {"at90s4434", "", "avr2", 0x800060},
  52     {"at90s8515", "", "avr2", 0x800060},
  53     {"at90c8534", "", "avr2", 0x800060},
  54     {"at90s8535", "", "avr2", 0x800060},
  55     {"attiny13", "avr25/tiny-stack", "avr25", 0x800060},
  56     {"attiny13a", "avr25/tiny-stack", "avr25", 0x800060},
  57     {"attiny2313", "avr25/tiny-stack", "avr25", 0x800060},
  58     {"attiny2313a", "avr25/tiny-stack", "avr25", 0x800060},
  59     {"attiny24", "avr25/tiny-stack", "avr25", 0x800060},
  60     {"attiny24a", "avr25/tiny-stack", "avr25", 0x800060},
  61     {"attiny25", "avr25/tiny-stack", "avr25", 0x800060},
  62     {"attiny261", "avr25/tiny-stack", "avr25", 0x800060},
  63     {"attiny261a", "avr25/tiny-stack", "avr25", 0x800060},
  64     {"at86rf401", "avr25", "avr25", 0x800060},
  65     {"ata5272", "avr25", "avr25", 0x800100},
  66     {"ata6616c", "avr25", "avr25", 0x800100},
  67     {"attiny4313", "avr25", "avr25", 0x800060},
  68     {"attiny44", "avr25", "avr25", 0x800060},
  69     {"attiny44a", "avr25", "avr25", 0x800060},
  70     {"attiny84", "avr25", "avr25", 0x800060},
  71     {"attiny84a", "avr25", "avr25", 0x800060},
  72     {"attiny45", "avr25", "avr25", 0x800060},
  73     {"attiny85", "avr25", "avr25", 0x800060},
  74     {"attiny441", "avr25", "avr25", 0x800100},
  75     {"attiny461", "avr25", "avr25", 0x800060},
  76     {"attiny461a", "avr25", "avr25", 0x800060},
  77     {"attiny841", "avr25", "avr25", 0x800100},
  78     {"attiny861", "avr25", "avr25", 0x800060},
  79     {"attiny861a", "avr25", "avr25", 0x800060},
  80     {"attiny87", "avr25", "avr25", 0x800100},
  81     {"attiny43u", "avr25", "avr25", 0x800060},
  82     {"attiny48", "avr25", "avr25", 0x800100},
  83     {"attiny88", "avr25", "avr25", 0x800100},
  84     {"attiny828", "avr25", "avr25", 0x800100},
  85     {"at43usb355", "avr3", "avr3", 0x800100},
  86     {"at76c711", "avr3", "avr3", 0x800060},
  87     {"atmega103", "avr31", "avr31", 0x800060},
  88     {"at43usb320", "avr31", "avr31", 0x800060},
  89     {"attiny167", "avr35", "avr35", 0x800100},
  90     {"at90usb82", "avr35", "avr35", 0x800100},
  91     {"at90usb162", "avr35", "avr35", 0x800100},
  92     {"ata5505", "avr35", "avr35", 0x800100},
  93     {"ata6617c", "avr35", "avr35", 0x800100},
  94     {"ata664251", "avr35", "avr35", 0x800100},
  95     {"atmega8u2", "avr35", "avr35", 0x800100},
  96     {"atmega16u2", "avr35", "avr35", 0x800100},
  97     {"atmega32u2", "avr35", "avr35", 0x800100},
  98     {"attiny1634", "avr35", "avr35", 0x800100},
  99     {"atmega8", "avr4", "avr4", 0x800060},
 100     {"ata6289", "avr4", "avr4", 0x800100},
 101     {"atmega8a", "avr4", "avr4", 0x800060},
 102     {"ata6285", "avr4", "avr4", 0x800100},
 103     {"ata6286", "avr4", "avr4", 0x800100},
 104     {"ata6612c", "avr4", "avr4", 0x800100},
 105     {"atmega48", "avr4", "avr4", 0x800100},
 106     {"atmega48a", "avr4", "avr4", 0x800100},
 107     {"atmega48pa", "avr4", "avr4", 0x800100},
 108     {"atmega48pb", "avr4", "avr4", 0x800100},
 109     {"atmega48p", "avr4", "avr4", 0x800100},
 110     {"atmega88", "avr4", "avr4", 0x800100},
 111     {"atmega88a", "avr4", "avr4", 0x800100},
 112     {"atmega88p", "avr4", "avr4", 0x800100},
 113     {"atmega88pa", "avr4", "avr4", 0x800100},
 114     {"atmega88pb", "avr4", "avr4", 0x800100},
 115     {"atmega8515", "avr4", "avr4", 0x800060},
 116     {"atmega8535", "avr4", "avr4", 0x800060},
 117     {"atmega8hva", "avr4", "avr4", 0x800100},
 118     {"at90pwm1", "avr4", "avr4", 0x800100},
 119     {"at90pwm2", "avr4", "avr4", 0x800100},
 120     {"at90pwm2b", "avr4", "avr4", 0x800100},
 121     {"at90pwm3", "avr4", "avr4", 0x800100},
 122     {"at90pwm3b", "avr4", "avr4", 0x800100},
 123     {"at90pwm81", "avr4", "avr4", 0x800100},
 124     {"ata5702m322", "avr5", "avr5", 0x800200},
 125     {"ata5782", "avr5", "avr5", 0x800200},
 126     {"ata5790", "avr5", "avr5", 0x800100},
 127     {"ata5790n", "avr5", "avr5", 0x800100},
 128     {"ata5791", "avr5", "avr5", 0x800100},
 129     {"ata5795", "avr5", "avr5", 0x800100},
 130     {"ata5831", "avr5", "avr5", 0x800200},
 131     {"ata6613c", "avr5", "avr5", 0x800100},
 132     {"ata6614q", "avr5", "avr5", 0x800100},
 133     {"ata8210", "avr5", "avr5", 0x800200},
 134     {"ata8510", "avr5", "avr5", 0x800200},
 135     {"atmega16", "avr5", "avr5", 0x800060},
 136     {"atmega16a", "avr5", "avr5", 0x800060},
 137     {"atmega161", "avr5", "avr5", 0x800060},
 138     {"atmega162", "avr5", "avr5", 0x800100},
 139     {"atmega163", "avr5", "avr5", 0x800060},
 140     {"atmega164a", "avr5", "avr5", 0x800100},
 141     {"atmega164p", "avr5", "avr5", 0x800100},
 142     {"atmega164pa", "avr5", "avr5", 0x800100},
 143     {"atmega165", "avr5", "avr5", 0x800100},
 144     {"atmega165a", "avr5", "avr5", 0x800100},
 145     {"atmega165p", "avr5", "avr5", 0x800100},
 146     {"atmega165pa", "avr5", "avr5", 0x800100},
 147     {"atmega168", "avr5", "avr5", 0x800100},
 148     {"atmega168a", "avr5", "avr5", 0x800100},
 149     {"atmega168p", "avr5", "avr5", 0x800100},
 150     {"atmega168pa", "avr5", "avr5", 0x800100},
 151     {"atmega168pb", "avr5", "avr5", 0x800100},
 152     {"atmega169", "avr5", "avr5", 0x800100},
 153     {"atmega169a", "avr5", "avr5", 0x800100},
 154     {"atmega169p", "avr5", "avr5", 0x800100},
 155     {"atmega169pa", "avr5", "avr5", 0x800100},
 156     {"atmega32", "avr5", "avr5", 0x800060},
 157     {"atmega32a", "avr5", "avr5", 0x800060},
 158     {"atmega323", "avr5", "avr5", 0x800060},
 159     {"atmega324a", "avr5", "avr5", 0x800100},
 160     {"atmega324p", "avr5", "avr5", 0x800100},
 161     {"atmega324pa", "avr5", "avr5", 0x800100},
 162     {"atmega324pb", "avr5", "avr5", 0x800100},
 163     {"atmega325", "avr5", "avr5", 0x800100},
 164     {"atmega325a", "avr5", "avr5", 0x800100},
 165     {"atmega325p", "avr5", "avr5", 0x800100},
 166     {"atmega325pa", "avr5", "avr5", 0x800100},
 167     {"atmega3250", "avr5", "avr5", 0x800100},
 168     {"atmega3250a", "avr5", "avr5", 0x800100},
 169     {"atmega3250p", "avr5", "avr5", 0x800100},
 170     {"atmega3250pa", "avr5", "avr5", 0x800100},
 171     {"atmega328", "avr5", "avr5", 0x800100},
 172     {"atmega328p", "avr5", "avr5", 0x800100},
 173     {"atmega328pb", "avr5", "avr5", 0x800100},
 174     {"atmega329", "avr5", "avr5", 0x800100},
 175     {"atmega329a", "avr5", "avr5", 0x800100},
 176     {"atmega329p", "avr5", "avr5", 0x800100},
 177     {"atmega329pa", "avr5", "avr5", 0x800100},
 178     {"atmega3290", "avr5", "avr5", 0x800100},
 179     {"atmega3290a", "avr5", "avr5", 0x800100},
 180     {"atmega3290p", "avr5", "avr5", 0x800100},
 181     {"atmega3290pa", "avr5", "avr5", 0x800100},
 182     {"atmega406", "avr5", "avr5", 0x800100},
 183     {"atmega64", "avr5", "avr5", 0x800100},
 184     {"atmega64a", "avr5", "avr5", 0x800100},
 185     {"atmega640", "avr5", "avr5", 0x800200},
 186     {"atmega644", "avr5", "avr5", 0x800100},
 187     {"atmega644a", "avr5", "avr5", 0x800100},
 188     {"atmega644p", "avr5", "avr5", 0x800100},
 189     {"atmega644pa", "avr5", "avr5", 0x800100},
 190     {"atmega645", "avr5", "avr5", 0x800100},
 191     {"atmega645a", "avr5", "avr5", 0x800100},
 192     {"atmega645p", "avr5", "avr5", 0x800100},
 193     {"atmega649", "avr5", "avr5", 0x800100},
 194     {"atmega649a", "avr5", "avr5", 0x800100},
 195     {"atmega649p", "avr5", "avr5", 0x800100},
 196     {"atmega6450", "avr5", "avr5", 0x800100},
 197     {"atmega6450a", "avr5", "avr5", 0x800100},
 198     {"atmega6450p", "avr5", "avr5", 0x800100},
 199     {"atmega6490", "avr5", "avr5", 0x800100},
 200     {"atmega6490a", "avr5", "avr5", 0x800100},
 201     {"atmega6490p", "avr5", "avr5", 0x800100},
 202     {"atmega64rfr2", "avr5", "avr5", 0x800200},
 203     {"atmega644rfr2", "avr5", "avr5", 0x800200},
 204     {"atmega16hva", "avr5", "avr5", 0x800100},
 205     {"atmega16hva2", "avr5", "avr5", 0x800100},
 206     {"atmega16hvb", "avr5", "avr5", 0x800100},
 207     {"atmega16hvbrevb", "avr5", "avr5", 0x800100},
 208     {"atmega32hvb", "avr5", "avr5", 0x800100},
 209     {"atmega32hvbrevb", "avr5", "avr5", 0x800100},
 210     {"atmega64hve", "avr5", "avr5", 0x800100},
 211     {"atmega64hve2", "avr5", "avr5", 0x800100},
 212     {"at90can32", "avr5", "avr5", 0x800100},
 213     {"at90can64", "avr5", "avr5", 0x800100},
 214     {"at90pwm161", "avr5", "avr5", 0x800100},
 215     {"at90pwm216", "avr5", "avr5", 0x800100},
 216     {"at90pwm316", "avr5", "avr5", 0x800100},
 217     {"atmega32c1", "avr5", "avr5", 0x800100},
 218     {"atmega64c1", "avr5", "avr5", 0x800100},
 219     {"atmega16m1", "avr5", "avr5", 0x800100},
 220     {"atmega32m1", "avr5", "avr5", 0x800100},
 221     {"atmega64m1", "avr5", "avr5", 0x800100},
 222     {"atmega16u4", "avr5", "avr5", 0x800100},
 223     {"atmega32u4", "avr5", "avr5", 0x800100},
 224     {"atmega32u6", "avr5", "avr5", 0x800100},
 225     {"at90usb646", "avr5", "avr5", 0x800100},
 226     {"at90usb647", "avr5", "avr5", 0x800100},
 227     {"at90scr100", "avr5", "avr5", 0x800100},
 228     {"at94k", "avr5", "avr5", 0x800060},
 229     {"m3000", "avr5", "avr5", 0x800060},
 230     {"atmega128", "avr51", "avr51", 0x800100},
 231     {"atmega128a", "avr51", "avr51", 0x800100},
 232     {"atmega1280", "avr51", "avr51", 0x800200},
 233     {"atmega1281", "avr51", "avr51", 0x800200},
 234     {"atmega1284", "avr51", "avr51", 0x800100},
 235     {"atmega1284p", "avr51", "avr51", 0x800100},
 236     {"atmega128rfa1", "avr51", "avr51", 0x800200},
 237     {"atmega128rfr2", "avr51", "avr51", 0x800200},
 238     {"atmega1284rfr2", "avr51", "avr51", 0x800200},
 239     {"at90can128", "avr51", "avr51", 0x800200},
 240     {"at90usb1286", "avr51", "avr51", 0x800200},
 241     {"at90usb1287", "avr51", "avr51", 0x800200},
 242     {"atmega2560", "avr6", "avr6", 0x800200},
 243     {"atmega2561", "avr6", "avr6", 0x800200},
 244     {"atmega256rfr2", "avr6", "avr6", 0x800200},
 245     {"atmega2564rfr2", "avr6", "avr6", 0x800200},
 246     {"attiny4", "avrtiny", "avrtiny", 0x800040},
 247     {"attiny5", "avrtiny", "avrtiny", 0x800040},
 248     {"attiny9", "avrtiny", "avrtiny", 0x800040},
 249     {"attiny10", "avrtiny", "avrtiny", 0x800040},
 250     {"attiny20", "avrtiny", "avrtiny", 0x800040},
 251     {"attiny40", "avrtiny", "avrtiny", 0x800040},
 252     {"attiny102", "avrtiny", "avrtiny", 0x800040},
 253     {"attiny104", "avrtiny", "avrtiny", 0x800040},
 254     {"atxmega16a4", "avrxmega2", "avrxmega2", 0x802000},
 255     {"atxmega16a4u", "avrxmega2", "avrxmega2", 0x802000},
 256     {"atxmega16c4", "avrxmega2", "avrxmega2", 0x802000},
 257     {"atxmega16d4", "avrxmega2", "avrxmega2", 0x802000},
 258     {"atxmega32a4", "avrxmega2", "avrxmega2", 0x802000},
 259     {"atxmega32a4u", "avrxmega2", "avrxmega2", 0x802000},
 260     {"atxmega32c3", "avrxmega2", "avrxmega2", 0x802000},
 261     {"atxmega32c4", "avrxmega2", "avrxmega2", 0x802000},
 262     {"atxmega32d3", "avrxmega2", "avrxmega2", 0x802000},
 263     {"atxmega32d4", "avrxmega2", "avrxmega2", 0x802000},
 264     {"atxmega32e5", "avrxmega2", "avrxmega2", 0x802000},
 265     {"atxmega16e5", "avrxmega2", "avrxmega2", 0x802000},
 266     {"atxmega8e5", "avrxmega2", "avrxmega2", 0x802000},
 267     {"atxmega64a3", "avrxmega4", "avrxmega4", 0x802000},
 268     {"atxmega64a3u", "avrxmega4", "avrxmega4", 0x802000},
 269     {"atxmega64a4u", "avrxmega4", "avrxmega4", 0x802000},
 270     {"atxmega64b1", "avrxmega4", "avrxmega4", 0x802000},
 271     {"atxmega64b3", "avrxmega4", "avrxmega4", 0x802000},
 272     {"atxmega64c3", "avrxmega4", "avrxmega4", 0x802000},
 273     {"atxmega64d3", "avrxmega4", "avrxmega4", 0x802000},
 274     {"atxmega64d4", "avrxmega4", "avrxmega4", 0x802000},
 275     {"atxmega64a1", "avrxmega5", "avrxmega5", 0x802000},
 276     {"atxmega64a1u", "avrxmega5", "avrxmega5", 0x802000},
 277     {"atxmega128a3", "avrxmega6", "avrxmega6", 0x802000},
 278     {"atxmega128a3u", "avrxmega6", "avrxmega6", 0x802000},
 279     {"atxmega128b1", "avrxmega6", "avrxmega6", 0x802000},
 280     {"atxmega128b3", "avrxmega6", "avrxmega6", 0x802000},
 281     {"atxmega128c3", "avrxmega6", "avrxmega6", 0x802000},
 282     {"atxmega128d3", "avrxmega6", "avrxmega6", 0x802000},
 283     {"atxmega128d4", "avrxmega6", "avrxmega6", 0x802000},
 284     {"atxmega192a3", "avrxmega6", "avrxmega6", 0x802000},
 285     {"atxmega192a3u", "avrxmega6", "avrxmega6", 0x802000},
 286     {"atxmega192c3", "avrxmega6", "avrxmega6", 0x802000},
 287     {"atxmega192d3", "avrxmega6", "avrxmega6", 0x802000},
 288     {"atxmega256a3", "avrxmega6", "avrxmega6", 0x802000},
 289     {"atxmega256a3u", "avrxmega6", "avrxmega6", 0x802000},
 290     {"atxmega256a3b", "avrxmega6", "avrxmega6", 0x802000},
 291     {"atxmega256a3bu", "avrxmega6", "avrxmega6", 0x802000},
 292     {"atxmega256c3", "avrxmega6", "avrxmega6", 0x802000},
 293     {"atxmega256d3", "avrxmega6", "avrxmega6", 0x802000},
 294     {"atxmega384c3", "avrxmega6", "avrxmega6", 0x802000},
 295     {"atxmega384d3", "avrxmega6", "avrxmega6", 0x802000},
 296     {"atxmega128a1", "avrxmega7", "avrxmega7", 0x802000},
 297     {"atxmega128a1u", "avrxmega7", "avrxmega7", 0x802000},
 298     {"atxmega128a4u", "avrxmega7", "avrxmega7", 0x802000},
 299     {"attiny202", "avrxmega3/short-calls", "avrxmega3", 0x803F80},
 300     {"attiny204", "avrxmega3/short-calls", "avrxmega3", 0x803F80},
 301     {"attiny212", "avrxmega3/short-calls", "avrxmega3", 0x803F80},
 302     {"attiny214", "avrxmega3/short-calls", "avrxmega3", 0x803F80},
 303     {"attiny402", "avrxmega3/short-calls", "avrxmega3", 0x803F00},
 304     {"attiny404", "avrxmega3/short-calls", "avrxmega3", 0x803F00},
 305     {"attiny406", "avrxmega3/short-calls", "avrxmega3", 0x803F00},
 306     {"attiny412", "avrxmega3/short-calls", "avrxmega3", 0x803F00},
 307     {"attiny414", "avrxmega3/short-calls", "avrxmega3", 0x803F00},
 308     {"attiny416", "avrxmega3/short-calls", "avrxmega3", 0x803F00},
 309     {"attiny417", "avrxmega3/short-calls", "avrxmega3", 0x803F00},
 310     {"attiny804", "avrxmega3/short-calls", "avrxmega3", 0x803E00},
 311     {"attiny806", "avrxmega3/short-calls", "avrxmega3", 0x803E00},
 312     {"attiny807", "avrxmega3/short-calls", "avrxmega3", 0x803E00},
 313     {"attiny814", "avrxmega3/short-calls", "avrxmega3", 0x803E00},
 314     {"attiny816", "avrxmega3/short-calls", "avrxmega3", 0x803E00},
 315     {"attiny817", "avrxmega3/short-calls", "avrxmega3", 0x803E00},
 316     {"atmega808", "avrxmega3/short-calls", "avrxmega3", 0x803C00},
 317     {"atmega809", "avrxmega3/short-calls", "avrxmega3", 0x803C00},
 318     {"atmega1608", "avrxmega3", "avrxmega3", 0x803800},
 319     {"atmega1609", "avrxmega3", "avrxmega3", 0x803800},
 320     {"atmega3208", "avrxmega3", "avrxmega3", 0x803000},
 321     {"atmega3209", "avrxmega3", "avrxmega3", 0x803000},
 322     {"atmega4808", "avrxmega3", "avrxmega3", 0x802800},
 323     {"atmega4809", "avrxmega3", "avrxmega3", 0x802800},
 324     {"attiny1604", "avrxmega3", "avrxmega3", 0x803C00},
 325     {"attiny1606", "avrxmega3", "avrxmega3", 0x803C00},
 326     {"attiny1607", "avrxmega3", "avrxmega3", 0x803C00},
 327     {"attiny1614", "avrxmega3", "avrxmega3", 0x803800},
 328     {"attiny1616", "avrxmega3", "avrxmega3", 0x803800},
 329     {"attiny1617", "avrxmega3", "avrxmega3", 0x803800},
 330     {"attiny1624", "avrxmega3", "avrxmega3", 0x803800},
 331     {"attiny1626", "avrxmega3", "avrxmega3", 0x803800},
 332     {"attiny1627", "avrxmega3", "avrxmega3", 0x803800},
 333     {"attiny3216", "avrxmega3", "avrxmega3", 0x803800},
 334     {"attiny3217", "avrxmega3", "avrxmega3", 0x803800},
 335 };
 336
 337 std::string GetMCUSubPath(StringRef MCUName) {
 338   for (const auto &MCU : MCUInfo)
 339     if (MCU.Name == MCUName)
 340       return std::string(MCU.SubPath);
 341   return "";
 342 }
 343
 344 llvm::Optional<StringRef> GetMCUFamilyName(StringRef MCUName) {
 345   for (const auto &MCU : MCUInfo)
 346     if (MCU.Name == MCUName)
 347       return Optional<StringRef>(MCU.Family);
 348   return Optional<StringRef>();
 349 }
 350
 351 llvm::Optional<unsigned> GetMCUSectionAddressData(StringRef MCUName) {
 352   for (const auto &MCU : MCUInfo)
 353     if (MCU.Name == MCUName && MCU.DataAddr > 0)
 354       return Optional<unsigned>(MCU.DataAddr);
 355   return Optional<unsigned>();
 356 }
 357
 358 const StringRef PossibleAVRLibcLocations[] = {
 359     "/avr",
 360     "/usr/avr",
 361     "/usr/lib/avr",
 362 };
 363
 364 } // end anonymous namespace
 365
 366 /// AVR Toolchain
 367 AVRToolChain::AVRToolChain(const Driver &D, const llvm::Triple &Triple,
 368                            const ArgList &Args)
 369     : Generic_ELF(D, Triple, Args) {
 370   GCCInstallation.init(Triple, Args);
 371
 372   if (getCPUName(D, Args, Triple).empty())
 373     D.Diag(diag::warn_drv_avr_mcu_not_specified);
 374
 375   // Only add default libraries if the user hasn't explicitly opted out.
 376   if (!Args.hasArg(options::OPT_nostdlib) &&
 377       !Args.hasArg(options::OPT_nodefaultlibs) && GCCInstallation.isValid()) {
 378     GCCInstallPath = GCCInstallation.getInstallPath();
 379     std::string GCCParentPath(GCCInstallation.getParentLibPath());
 380     getProgramPaths().push_back(GCCParentPath + "/../bin");
 381   }
 382 }
 383
 384 void AVRToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
 385                                              ArgStringList &CC1Args) const {
 386   if (DriverArgs.hasArg(options::OPT_nostdinc) ||
 387       DriverArgs.hasArg(options::OPT_nostdlibinc))
 388     return;
 389
 390   // Omit if there is no avr-libc installed.
 391   Optional<std::string> AVRLibcRoot = findAVRLibcInstallation();
 392   if (!AVRLibcRoot)
 393     return;
 394
 395   // Add 'avr-libc/include' to clang system include paths if applicable.
 396   std::string AVRInc = *AVRLibcRoot + "/include";
 397   if (llvm::sys::fs::is_directory(AVRInc))
 398     addSystemInclude(DriverArgs, CC1Args, AVRInc);
 399 }
 400
 401 void AVRToolChain::addClangTargetOptions(
 402     const llvm::opt::ArgList &DriverArgs, llvm::opt::ArgStringList &CC1Args,
 403     Action::OffloadKind DeviceOffloadKind) const {
 404   // By default, use `.ctors` (not `.init_array`), as required by libgcc, which
 405   // runs constructors/destructors on AVR.
 406   if (!DriverArgs.hasFlag(options::OPT_fuse_init_array,
 407                           options::OPT_fno_use_init_array, false))
 408     CC1Args.push_back("-fno-use-init-array");
 409   // Use `-fno-use-cxa-atexit` as default, since avr-libc does not support
 410   // `__cxa_atexit()`.
 411   if (!DriverArgs.hasFlag(options::OPT_fuse_cxa_atexit,
 412                           options::OPT_fno_use_cxa_atexit, false))
 413     CC1Args.push_back("-fno-use-cxa-atexit");
 414 }
 415
 416 Tool *AVRToolChain::buildLinker() const {
 417   return new tools::AVR::Linker(getTriple(), *this);
 418 }
 419
 420 std::string
 421 AVRToolChain::getCompilerRT(const llvm::opt::ArgList &Args, StringRef Component,
 422                             FileType Type = ToolChain::FT_Static) const {
 423   assert(Type == ToolChain::FT_Static && "AVR only supports static libraries");
 424   // Since AVR can never be a host environment, its compiler-rt library files
 425   // should always have ".a" suffix, even on windows.
 426   SmallString<32> File("/libclang_rt.");
 427   File += Component.str();
 428   File += ".a";
 429   // Return the default compiler-rt path appended with
 430   // "avr/libclang_rt.$COMPONENT.a".
 431   SmallString<256> Path(ToolChain::getCompilerRTPath());
 432   llvm::sys::path::append(Path, "avr");
 433   llvm::sys::path::append(Path, File.str());
 434   return std::string(Path.str());
 435 }
 436
 437 void AVR::Linker::ConstructJob(Compilation &C, const JobAction &JA,
 438                                const InputInfo &Output,
 439                                const InputInfoList &Inputs, const ArgList &Args,
 440                                const char *LinkingOutput) const {
 441   const auto &TC = static_cast<const AVRToolChain &>(getToolChain());
 442   const Driver &D = getToolChain().getDriver();
 443
 444   // Compute information about the target AVR.
 445   std::string CPU = getCPUName(D, Args, getToolChain().getTriple());
 446   llvm::Optional<StringRef> FamilyName = GetMCUFamilyName(CPU);
 447   llvm::Optional<std::string> AVRLibcRoot = TC.findAVRLibcInstallation();
 448   llvm::Optional<unsigned> SectionAddressData = GetMCUSectionAddressData(CPU);
 449
 450   // Compute the linker program path, and use GNU "avr-ld" as default.
 451   const Arg *A = Args.getLastArg(options::OPT_fuse_ld_EQ);
 452   std::string Linker = A ? getToolChain().GetLinkerPath(nullptr)
 453                          : getToolChain().GetProgramPath(getShortName());
 454
 455   ArgStringList CmdArgs;
 456
 457   CmdArgs.push_back("-o");
 458   CmdArgs.push_back(Output.getFilename());
 459
 460   // Enable garbage collection of unused sections.
 461   CmdArgs.push_back("--gc-sections");
 462
 463   // Add library search paths before we specify libraries.
 464   Args.AddAllArgs(CmdArgs, options::OPT_L);
 465   getToolChain().AddFilePathLibArgs(Args, CmdArgs);
 466
 467   // Currently we only support libgcc and compiler-rt.
 468   auto RtLib = TC.GetRuntimeLibType(Args);
 469   assert(
 470       (RtLib == ToolChain::RLT_Libgcc || RtLib == ToolChain::RLT_CompilerRT) &&
 471       "unknown runtime library");
 472
 473   // Only add default libraries if the user hasn't explicitly opted out.
 474   bool LinkStdlib = false;
 475   if (!Args.hasArg(options::OPT_nostdlib) &&
 476       !Args.hasArg(options::OPT_nodefaultlibs)) {
 477     if (!CPU.empty()) {
 478       if (!FamilyName) {
 479         // We do not have an entry for this CPU in the family
 480         // mapping table yet.
 481         D.Diag(diag::warn_drv_avr_family_linking_stdlibs_not_implemented)
 482             << CPU;
 483       } else if (!AVRLibcRoot) {
 484         // No avr-libc found and so no runtime linked.
 485         D.Diag(diag::warn_drv_avr_libc_not_found);
 486       } else {
 487         std::string SubPath = GetMCUSubPath(CPU);
 488         // Add path of avr-libc.
 489         CmdArgs.push_back(
 490             Args.MakeArgString(Twine("-L") + *AVRLibcRoot + "/lib/" + SubPath));
 491         if (RtLib == ToolChain::RLT_Libgcc)
 492           CmdArgs.push_back(Args.MakeArgString("-L" + TC.getGCCInstallPath() +
 493                                                "/" + SubPath));
 494         LinkStdlib = true;
 495       }
 496     }
 497     if (!LinkStdlib)
 498       D.Diag(diag::warn_drv_avr_stdlib_not_linked);
 499   }
 500
 501   if (SectionAddressData) {
 502     std::string DataSectionArg =
 503         std::string("-Tdata=0x") + llvm::utohexstr(SectionAddressData.value());
 504     CmdArgs.push_back(Args.MakeArgString(DataSectionArg));
 505   } else {
 506     // We do not have an entry for this CPU in the address mapping table yet.
 507     D.Diag(diag::warn_drv_avr_linker_section_addresses_not_implemented) << CPU;
 508   }
 509
 510   // If the family name is known, we can link with the device-specific libgcc.
 511   // Without it, libgcc will simply not be linked. This matches avr-gcc
 512   // behavior.
 513   if (LinkStdlib) {
 514     assert(!CPU.empty() && "CPU name must be known in order to link stdlibs");
 515
 516     CmdArgs.push_back("--start-group");
 517
 518     // Add the object file for the CRT.
 519     std::string CrtFileName = std::string("-l:crt") + CPU + std::string(".o");
 520     CmdArgs.push_back(Args.MakeArgString(CrtFileName));
 521
 522     // Link to libgcc.
 523     if (RtLib == ToolChain::RLT_Libgcc)
 524       CmdArgs.push_back("-lgcc");
 525
 526     // Link to generic libraries of avr-libc.
 527     CmdArgs.push_back("-lm");
 528     CmdArgs.push_back("-lc");
 529
 530     // Add the link library specific to the MCU.
 531     CmdArgs.push_back(Args.MakeArgString(std::string("-l") + CPU));
 532
 533     // Add the relocatable inputs.
 534     AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
 535
 536     // We directly use libclang_rt.builtins.a as input file, instead of using
 537     // '-lclang_rt.builtins'.
 538     if (RtLib == ToolChain::RLT_CompilerRT) {
 539       std::string RtLib =
 540           getToolChain().getCompilerRT(Args, "builtins", ToolChain::FT_Static);
 541       if (llvm::sys::fs::exists(RtLib))
 542         CmdArgs.push_back(Args.MakeArgString(RtLib));
 543     }
 544
 545     CmdArgs.push_back("--end-group");
 546
 547     // Add user specified linker script.
 548     Args.AddAllArgs(CmdArgs, options::OPT_T);
 549
 550     // Specify the family name as the emulation mode to use.
 551     // This is almost always required because otherwise avr-ld
 552     // will assume 'avr2' and warn about the program being larger
 553     // than the bare minimum supports.
 554     if (Linker.find("avr-ld") != std::string::npos)
 555       CmdArgs.push_back(Args.MakeArgString(std::string("-m") + *FamilyName));
 556   } else {
 557     AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
 558   }
 559
 560   C.addCommand(std::make_unique<Command>(
 561       JA, *this, ResponseFileSupport::AtFileCurCP(), Args.MakeArgString(Linker),
 562       CmdArgs, Inputs, Output));
 563 }
 564
 565 llvm::Optional<std::string> AVRToolChain::findAVRLibcInstallation() const {
 566   // Search avr-libc installation according to avr-gcc installation.
 567   std::string GCCParent(GCCInstallation.getParentLibPath());
 568   std::string Path(GCCParent + "/avr");
 569   if (llvm::sys::fs::is_directory(Path))
 570     return Path;
 571   Path = GCCParent + "/../avr";
 572   if (llvm::sys::fs::is_directory(Path))
 573     return Path;
 574
 575   // Search avr-libc installation from possible locations, and return the first
 576   // one that exists, if there is no avr-gcc installed.
 577   for (StringRef PossiblePath : PossibleAVRLibcLocations) {
 578     std::string Path = getDriver().SysRoot + PossiblePath.str();
 579     if (llvm::sys::fs::is_directory(Path))
 580       return Path;
 581   }
 582
 583   return llvm::None;
 584 }