src/basic/architecture.c

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