src/shared/architecture.c

   1 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
   2
   3 /***
   4   This file is part of systemd.
   5
   6   Copyright 2014 Lennart Poettering
   7
   8   systemd is free software; you can redistribute it and/or modify it
   9   under the terms of the GNU Lesser General Public License as published by
  10   the Free Software Foundation; either version 2.1 of the License, or
  11   (at your option) any later version.
  12
  13   systemd is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   Lesser General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  20 ***/
  21
  22 #include <sys/utsname.h>
  23
  24 #include "string-table.h"
  25 #include "string-util.h"
  26 #include "architecture.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__) || defined(__sparc64__)
  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 #else
 126 #error "Please register your architecture here!"
 127 #endif
 128         };
 129
 130         static int cached = _ARCHITECTURE_INVALID;
 131         struct utsname u;
 132         unsigned i;
 133
 134         if (cached != _ARCHITECTURE_INVALID)
 135                 return cached;
 136
 137         assert_se(uname(&u) >= 0);
 138
 139         for (i = 0; i < ELEMENTSOF(arch_map); i++)
 140                 if (streq(arch_map[i].machine, u.machine))
 141                         return cached = arch_map[i].arch;
 142
 143         assert_not_reached("Couldn't identify architecture. You need to patch systemd.");
 144         return _ARCHITECTURE_INVALID;
 145 }
 146
 147 static const char *const architecture_table[_ARCHITECTURE_MAX] = {
 148         [ARCHITECTURE_X86] = "x86",
 149         [ARCHITECTURE_X86_64] = "x86-64",
 150         [ARCHITECTURE_PPC] = "ppc",
 151         [ARCHITECTURE_PPC_LE] = "ppc-le",
 152         [ARCHITECTURE_PPC64] = "ppc64",
 153         [ARCHITECTURE_PPC64_LE] = "ppc64-le",
 154         [ARCHITECTURE_IA64] = "ia64",
 155         [ARCHITECTURE_PARISC] = "parisc",
 156         [ARCHITECTURE_PARISC64] = "parisc64",
 157         [ARCHITECTURE_S390] = "s390",
 158         [ARCHITECTURE_S390X] = "s390x",
 159         [ARCHITECTURE_SPARC] = "sparc",
 160         [ARCHITECTURE_SPARC64] = "sparc64",
 161         [ARCHITECTURE_MIPS] = "mips",
 162         [ARCHITECTURE_MIPS_LE] = "mips-le",
 163         [ARCHITECTURE_MIPS64] = "mips64",
 164         [ARCHITECTURE_MIPS64_LE] = "mips64-le",
 165         [ARCHITECTURE_ALPHA] = "alpha",
 166         [ARCHITECTURE_ARM] = "arm",
 167         [ARCHITECTURE_ARM_BE] = "arm-be",
 168         [ARCHITECTURE_ARM64] = "arm64",
 169         [ARCHITECTURE_ARM64_BE] = "arm64-be",
 170         [ARCHITECTURE_SH] = "sh",
 171         [ARCHITECTURE_SH64] = "sh64",
 172         [ARCHITECTURE_M68K] = "m68k",
 173         [ARCHITECTURE_TILEGX] = "tilegx",
 174         [ARCHITECTURE_CRIS] = "cris",
 175 };
 176
 177 DEFINE_STRING_TABLE_LOOKUP(architecture, int);