src/basic/architecture.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2014 Lennart Poettering
   5
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <sys/utsname.h>
  21
  22 #include "architecture.h"
  23 #include "macro.h"
  24 #include "string-table.h"
  25 #include "string-util.h"
  26
  27 int uname_architecture(void) {
  28
  29         /* Return a sanitized enum identifying the architecture we are
  30          * running on. This is based on uname(), and the user may
  31          * hence control what this returns by using
  32          * personality(). This puts the user in control on systems
  33          * that can run binaries of multiple architectures.
  34          *
  35          * We do not translate the string returned by uname()
  36          * 1:1. Instead we try to clean it up and break down the
  37          * confusion on x86 and arm in particular.
  38          *
  39          * We do not try to distinguish CPUs not CPU features, but
  40          * actual architectures, i.e. that have genuinely different
  41          * code. */
  42
  43         static const struct {
  44                 const char *machine;
  45                 int arch;
  46         } arch_map[] = {
  47 #if defined(__x86_64__) || defined(__i386__)
  48                 { "x86_64",     ARCHITECTURE_X86_64   },
  49                 { "i686",       ARCHITECTURE_X86      },
  50                 { "i586",       ARCHITECTURE_X86      },
  51                 { "i486",       ARCHITECTURE_X86      },
  52                 { "i386",       ARCHITECTURE_X86      },
  53 #elif defined(__powerpc__) || defined(__powerpc64__)
  54                 { "ppc64",      ARCHITECTURE_PPC64    },
  55                 { "ppc64le",    ARCHITECTURE_PPC64_LE },
  56                 { "ppc",        ARCHITECTURE_PPC      },
  57                 { "ppcle",      ARCHITECTURE_PPC_LE   },
  58 #elif defined(__ia64__)
  59                 { "ia64",       ARCHITECTURE_IA64     },
  60 #elif defined(__hppa__) || defined(__hppa64__)
  61                 { "parisc64",   ARCHITECTURE_PARISC64 },
  62                 { "parisc",     ARCHITECTURE_PARISC   },
  63 #elif defined(__s390__) || defined(__s390x__)
  64                 { "s390x",      ARCHITECTURE_S390X    },
  65                 { "s390",       ARCHITECTURE_S390     },
  66 #elif defined(__sparc__)
  67                 { "sparc64",    ARCHITECTURE_SPARC64  },
  68                 { "sparc",      ARCHITECTURE_SPARC    },
  69 #elif defined(__mips__) || defined(__mips64__)
  70                 { "mips64",     ARCHITECTURE_MIPS64   },
  71                 { "mips",       ARCHITECTURE_MIPS     },
  72 #elif defined(__alpha__)
  73                 { "alpha" ,     ARCHITECTURE_ALPHA    },
  74 #elif defined(__arm__) || defined(__aarch64__)
  75                 { "aarch64",    ARCHITECTURE_ARM64    },
  76                 { "aarch64_be", ARCHITECTURE_ARM64_BE },
  77                 { "armv4l",     ARCHITECTURE_ARM      },
  78                 { "armv4b",     ARCHITECTURE_ARM_BE   },
  79                 { "armv4tl",    ARCHITECTURE_ARM      },
  80                 { "armv4tb",    ARCHITECTURE_ARM_BE   },
  81                 { "armv5tl",    ARCHITECTURE_ARM      },
  82                 { "armv5tb",    ARCHITECTURE_ARM_BE   },
  83                 { "armv5tel",   ARCHITECTURE_ARM      },
  84                 { "armv5teb" ,  ARCHITECTURE_ARM_BE   },
  85                 { "armv5tejl",  ARCHITECTURE_ARM      },
  86                 { "armv5tejb",  ARCHITECTURE_ARM_BE   },
  87                 { "armv6l",     ARCHITECTURE_ARM      },
  88                 { "armv6b",     ARCHITECTURE_ARM_BE   },
  89                 { "armv7l",     ARCHITECTURE_ARM      },
  90                 { "armv7b",     ARCHITECTURE_ARM_BE   },
  91                 { "armv7ml",    ARCHITECTURE_ARM      },
  92                 { "armv7mb",    ARCHITECTURE_ARM_BE   },
  93                 { "armv4l",     ARCHITECTURE_ARM      },
  94                 { "armv4b",     ARCHITECTURE_ARM_BE   },
  95                 { "armv4tl",    ARCHITECTURE_ARM      },
  96                 { "armv4tb",    ARCHITECTURE_ARM_BE   },
  97                 { "armv5tl",    ARCHITECTURE_ARM      },
  98                 { "armv5tb",    ARCHITECTURE_ARM_BE   },
  99                 { "armv5tel",   ARCHITECTURE_ARM      },
 100                 { "armv5teb",   ARCHITECTURE_ARM_BE   },
 101                 { "armv5tejl",  ARCHITECTURE_ARM      },
 102                 { "armv5tejb",  ARCHITECTURE_ARM_BE   },
 103                 { "armv6l",     ARCHITECTURE_ARM      },
 104                 { "armv6b",     ARCHITECTURE_ARM_BE   },
 105                 { "armv7l",     ARCHITECTURE_ARM      },
 106                 { "armv7b",     ARCHITECTURE_ARM_BE   },
 107                 { "armv7ml",    ARCHITECTURE_ARM      },
 108                 { "armv7mb",    ARCHITECTURE_ARM_BE   },
 109                 { "armv8l",     ARCHITECTURE_ARM      },
 110                 { "armv8b",     ARCHITECTURE_ARM_BE   },
 111 #elif defined(__sh__) || defined(__sh64__)
 112                 { "sh5",        ARCHITECTURE_SH64     },
 113                 { "sh2",        ARCHITECTURE_SH       },
 114                 { "sh2a",       ARCHITECTURE_SH       },
 115                 { "sh3",        ARCHITECTURE_SH       },
 116                 { "sh4",        ARCHITECTURE_SH       },
 117                 { "sh4a",       ARCHITECTURE_SH       },
 118 #elif defined(__m68k__)
 119                 { "m68k",       ARCHITECTURE_M68K     },
 120 #elif defined(__tilegx__)
 121                 { "tilegx",     ARCHITECTURE_TILEGX   },
 122 #elif defined(__cris__)
 123                 { "crisv32",    ARCHITECTURE_CRIS     },
 124 #elif defined(__nios2__)
 125                 { "nios2",      ARCHITECTURE_NIOS2    },
 126 #elif defined(__riscv__) || defined(__riscv)
 127         /* __riscv__ is obsolete, remove in 2018 */
 128                 { "riscv32",    ARCHITECTURE_RISCV32  },
 129                 { "riscv64",    ARCHITECTURE_RISCV64  },
 130 #  if __SIZEOF_POINTER__ == 4
 131                 { "riscv",      ARCHITECTURE_RISCV32  },
 132 #  elif __SIZEOF_POINTER__ == 8
 133                 { "riscv",      ARCHITECTURE_RISCV64  },
 134 #  endif
 135 #elif defined(__arc__)
 136                 { "arc",        ARCHITECTURE_ARC      },
 137                 { "arceb",      ARCHITECTURE_ARC_BE   },
 138 #else
 139 #error "Please register your architecture here!"
 140 #endif
 141         };
 142
 143         static int cached = _ARCHITECTURE_INVALID;
 144         struct utsname u;
 145         unsigned i;
 146
 147         if (cached != _ARCHITECTURE_INVALID)
 148                 return cached;
 149
 150         assert_se(uname(&u) >= 0);
 151
 152         for (i = 0; i < ELEMENTSOF(arch_map); i++)
 153                 if (streq(arch_map[i].machine, u.machine))
 154                         return cached = arch_map[i].arch;
 155
 156         assert_not_reached("Couldn't identify architecture. You need to patch systemd.");
 157         return _ARCHITECTURE_INVALID;
 158 }
 159
 160 static const char *const architecture_table[_ARCHITECTURE_MAX] = {
 161         [ARCHITECTURE_X86] = "x86",
 162         [ARCHITECTURE_X86_64] = "x86-64",
 163         [ARCHITECTURE_PPC] = "ppc",
 164         [ARCHITECTURE_PPC_LE] = "ppc-le",
 165         [ARCHITECTURE_PPC64] = "ppc64",
 166         [ARCHITECTURE_PPC64_LE] = "ppc64-le",
 167         [ARCHITECTURE_IA64] = "ia64",
 168         [ARCHITECTURE_PARISC] = "parisc",
 169         [ARCHITECTURE_PARISC64] = "parisc64",
 170         [ARCHITECTURE_S390] = "s390",
 171         [ARCHITECTURE_S390X] = "s390x",
 172         [ARCHITECTURE_SPARC] = "sparc",
 173         [ARCHITECTURE_SPARC64] = "sparc64",
 174         [ARCHITECTURE_MIPS] = "mips",
 175         [ARCHITECTURE_MIPS_LE] = "mips-le",
 176         [ARCHITECTURE_MIPS64] = "mips64",
 177         [ARCHITECTURE_MIPS64_LE] = "mips64-le",
 178         [ARCHITECTURE_ALPHA] = "alpha",
 179         [ARCHITECTURE_ARM] = "arm",
 180         [ARCHITECTURE_ARM_BE] = "arm-be",
 181         [ARCHITECTURE_ARM64] = "arm64",
 182         [ARCHITECTURE_ARM64_BE] = "arm64-be",
 183         [ARCHITECTURE_SH] = "sh",
 184         [ARCHITECTURE_SH64] = "sh64",
 185         [ARCHITECTURE_M68K] = "m68k",
 186         [ARCHITECTURE_TILEGX] = "tilegx",
 187         [ARCHITECTURE_CRIS] = "cris",
 188         [ARCHITECTURE_NIOS2] = "nios2",
 189         [ARCHITECTURE_RISCV32] = "riscv32",
 190         [ARCHITECTURE_RISCV64] = "riscv64",
 191         [ARCHITECTURE_ARC] = "arc",
 192         [ARCHITECTURE_ARC_BE] = "arc-be",
 193 };
 194
 195 DEFINE_STRING_TABLE_LOOKUP(architecture, int);