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 "architecture.h"
  25
  26 int uname_architecture(void) {
  27
  28         /* Return a sanitized enum identifying the architecture we are
  29          * running on. This is based on uname(), and the user may
  30          * hence control what this returns by using
  31          * personality(). This puts the user in control on systems
  32          * that can run binaries of multiple architectures.
  33          *
  34          * We do not translate the string returned by uname()
  35          * 1:1. Instead we try to clean it up and break down the
  36          * confusion on x86 and arm in particular.
  37          *
  38          * We do not try to distuingish CPUs not CPU features, but
  39          * actual architectures, i.e. that have genuinely different
  40          * code. */
  41
  42         static const struct {
  43                 const char *machine;
  44                 int arch;
  45         } arch_map[] = {
  46 #if defined(__x86_64__) || defined(__i386__)
  47                 { "x86_64",     ARCHITECTURE_X86_64   },
  48                 { "i686",       ARCHITECTURE_X86      },
  49                 { "i586",       ARCHITECTURE_X86      },
  50                 { "i486",       ARCHITECTURE_X86      },
  51                 { "i386",       ARCHITECTURE_X86      },
  52 #elif defined(__powerpc__) || defined(__powerpc64__)
  53                 { "ppc64",      ARCHITECTURE_PPC64    },
  54                 { "ppc64le",    ARCHITECTURE_PPC64_LE },
  55                 { "ppc",        ARCHITECTURE_PPC      },
  56                 { "ppcle",      ARCHITECTURE_PPC_LE   },
  57 #elif defined(__ia64__)
  58                 { "ia64",       ARCHITECTURE_IA64     },
  59 #elif defined(__hppa__) || defined(__hppa64__)
  60                 { "parisc64",   ARCHITECTURE_PARISC64 },
  61                 { "parisc",     ARCHITECTURE_PARISC   },
  62 #elif defined(__s390__) || defined(__s390x__)
  63                 { "s390x",      ARCHITECTURE_S390X    },
  64                 { "s390",       ARCHITECTURE_S390     },
  65 #elif defined(__sparc__) || defined(__sparc64__)
  66                 { "sparc64",    ARCHITECTURE_SPARC64  },
  67                 { "sparc",      ARCHITECTURE_SPARC    },
  68 #elif defined(__mips__) || defined(__mips64__)
  69                 { "mips64",     ARCHITECTURE_MIPS64   },
  70                 { "mips",       ARCHITECTURE_MIPS     },
  71 #elif defined(__alpha__)
  72                 { "alpha" ,     ARCHITECTURE_ALPHA    },
  73 #elif defined(__arm__) || defined(__aarch64__)
  74                 { "aarch64",    ARCHITECTURE_ARM64    },
  75                 { "aarch64_be", ARCHITECTURE_ARM64_BE },
  76                 { "armv4l",     ARCHITECTURE_ARM      },
  77                 { "armv4b",     ARCHITECTURE_ARM_BE   },
  78                 { "armv4tl",    ARCHITECTURE_ARM      },
  79                 { "armv4tb",    ARCHITECTURE_ARM_BE   },
  80                 { "armv5tl",    ARCHITECTURE_ARM      },
  81                 { "armv5tb",    ARCHITECTURE_ARM_BE   },
  82                 { "armv5tel",   ARCHITECTURE_ARM      },
  83                 { "armv5teb" ,  ARCHITECTURE_ARM_BE   },
  84                 { "armv5tejl",  ARCHITECTURE_ARM      },
  85                 { "armv5tejb",  ARCHITECTURE_ARM_BE   },
  86                 { "armv6l",     ARCHITECTURE_ARM      },
  87                 { "armv6b",     ARCHITECTURE_ARM_BE   },
  88                 { "armv7l",     ARCHITECTURE_ARM      },
  89                 { "armv7b",     ARCHITECTURE_ARM_BE   },
  90                 { "armv7ml",    ARCHITECTURE_ARM      },
  91                 { "armv7mb",    ARCHITECTURE_ARM_BE   },
  92                 { "armv4l",     ARCHITECTURE_ARM      },
  93                 { "armv4b",     ARCHITECTURE_ARM_BE   },
  94                 { "armv4tl",    ARCHITECTURE_ARM      },
  95                 { "armv4tb",    ARCHITECTURE_ARM_BE   },
  96                 { "armv5tl",    ARCHITECTURE_ARM      },
  97                 { "armv5tb",    ARCHITECTURE_ARM_BE   },
  98                 { "armv5tel",   ARCHITECTURE_ARM      },
  99                 { "armv5teb",   ARCHITECTURE_ARM_BE   },
 100                 { "armv5tejl",  ARCHITECTURE_ARM      },
 101                 { "armv5tejb",  ARCHITECTURE_ARM_BE   },
 102                 { "armv6l",     ARCHITECTURE_ARM      },
 103                 { "armv6b",     ARCHITECTURE_ARM_BE   },
 104                 { "armv7l",     ARCHITECTURE_ARM      },
 105                 { "armv7b",     ARCHITECTURE_ARM_BE   },
 106                 { "armv7ml",    ARCHITECTURE_ARM      },
 107                 { "armv7mb",    ARCHITECTURE_ARM_BE   },
 108                 { "armv8l",     ARCHITECTURE_ARM      },
 109                 { "armv8b",     ARCHITECTURE_ARM_BE   },
 110 #elif defined(__sh__) || defined(__sh64__)
 111                 { "sh64",       ARCHITECTURE_SH64     },
 112                 { "sh",         ARCHITECTURE_SH       },
 113 #elif defined(__m68k__)
 114                 { "m68k",       ARCHITECTURE_M68K     },
 115 #elif defined(__tilegx__)
 116                 { "tilegx",     ARCHITECTURE_TILEGX   },
 117 #elif defined(__cris__)
 118                 { "crisv32",    ARCHITECTURE_CRIS     },
 119 #else
 120 #error "Please register your architecture here!"
 121 #endif
 122         };
 123
 124         static int cached = _ARCHITECTURE_INVALID;
 125         struct utsname u;
 126         unsigned i;
 127
 128         if (cached != _ARCHITECTURE_INVALID)
 129                 return cached;
 130
 131         assert_se(uname(&u) >= 0);
 132
 133         for (i = 0; i < ELEMENTSOF(arch_map); i++)
 134                 if (streq(arch_map[i].machine, u.machine))
 135                         return cached = arch_map[i].arch;
 136
 137         assert_not_reached("Couldn't identify architecture. You need to patch systemd.");
 138         return _ARCHITECTURE_INVALID;
 139 }
 140
 141 static const char *const architecture_table[_ARCHITECTURE_MAX] = {
 142         [ARCHITECTURE_X86] = "x86",
 143         [ARCHITECTURE_X86_64] = "x86-64",
 144         [ARCHITECTURE_PPC] = "ppc",
 145         [ARCHITECTURE_PPC_LE] = "ppc-le",
 146         [ARCHITECTURE_PPC64] = "ppc64",
 147         [ARCHITECTURE_PPC64_LE] = "ppc64-le",
 148         [ARCHITECTURE_IA64] = "ia64",
 149         [ARCHITECTURE_PARISC] = "parisc",
 150         [ARCHITECTURE_PARISC64] = "parisc64",
 151         [ARCHITECTURE_S390] = "s390",
 152         [ARCHITECTURE_S390X] = "s390x",
 153         [ARCHITECTURE_SPARC] = "sparc",
 154         [ARCHITECTURE_SPARC64] = "sparc64",
 155         [ARCHITECTURE_MIPS] = "mips",
 156         [ARCHITECTURE_MIPS_LE] = "mips-le",
 157         [ARCHITECTURE_MIPS64] = "mips64",
 158         [ARCHITECTURE_MIPS64_LE] = "mips64-le",
 159         [ARCHITECTURE_ALPHA] = "alpha",
 160         [ARCHITECTURE_ARM] = "arm",
 161         [ARCHITECTURE_ARM_BE] = "arm-be",
 162         [ARCHITECTURE_ARM64] = "arm64",
 163         [ARCHITECTURE_ARM64_BE] = "arm64-be",
 164         [ARCHITECTURE_SH] = "sh",
 165         [ARCHITECTURE_SH64] = "sh64",
 166         [ARCHITECTURE_M68K] = "m68k",
 167         [ARCHITECTURE_TILEGX] = "tilegx",
 168         [ARCHITECTURE_CRIS] = "cris",
 169 };
 170
 171 DEFINE_STRING_TABLE_LOOKUP(architecture, int);