core: add new ConditionArchitecture() that checks the architecture returned by uname()'s machine field.

1 files changed, 159 insertions, 0 deletions

diff --git a/src/shared/architecture.c b/src/shared/architecture.c
new file mode 100644
index 0000000000..1dc5fa5c0f
--- /dev/null
+++ b/src/shared/architecture.c
@@ -0,0 +1,159 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+  This file is part of systemd.
+
+  Copyright 2014 Lennart Poettering
+
+  systemd is free software; you can redistribute it and/or modify it
+  under the terms of the GNU Lesser General Public License as published by
+  the Free Software Foundation; either version 2.1 of the License, or
+  (at your option) any later version.
+
+  systemd is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <sys/utsname.h>
+
+#include "architecture.h"
+
+Architecture uname_architecture(void) {
+
+        /* Return a sanitized enum identifying the architecture we are
+         * running on. This is based on uname(), and the user may
+         * hence control what this returns by using
+         * personality(). This puts the user in control on systems
+         * that can run binaries of multiple architectures.
+         *
+         * We do not translate the string returned by uname()
+         * 1:1. Instead we try to clean it up and break down the
+         * confusion on x86 and arm in particular.
+         *
+         * We do not try to distuingish CPUs not CPU features, but
+         * actual architectures, i.e. that have genuinely different
+         * code. */
+
+        static const struct {
+                const char *machine;
+                Architecture arch;
+        } arch_map[] = {
+#if defined(__x86_64__) || defined(__i386__)
+                { "x86_64",     ARCHITECTURE_X86_64   },
+                { "i686",       ARCHITECTURE_X86      },
+                { "i586",       ARCHITECTURE_X86      },
+                { "i486",       ARCHITECTURE_X86      },
+                { "i386",       ARCHITECTURE_X86      },
+#elif defined(__powerpc__) || defined(__powerpc64__)
+                { "ppc64",      ARCHITECTURE_PPC64    },
+                { "ppc",        ARCHITECTURE_PPC      },
+#elif defined(__ia64__)
+                { "ia64",       ARCHITECTURE_IA64     },
+#elif defined(__hppa__) || defined(__hppa64__)
+                { "parisc64",   ARCHITECTURE_PARISC64 },
+                { "parisc",     ARCHITECTURE_PARISC   },
+#elif defined(__s390__) || defined(__s390x__)
+                { "s390x",      ARCHITECTURE_S390X    },
+                { "s390",       ARCHITECTURE_S390     },
+#elif defined(__sparc__) || defined(__sparc64__)
+                { "sparc64",    ARCHITECTURE_SPARC64  },
+                { "sparc",      ARCHITECTURE_SPARC    },
+#elif defined(__mips__) || defined(__mips64__)
+                { "mips64",     ARCHITECTURE_MIPS64   },
+                { "mips",       ARCHITECTURE_MIPS     },
+#elif defined(__alpha__)
+                { "alpha" ,     ARCHITECTURE_ALPHA    },
+#elif defined(__arm__) || defined(__aarch64__)
+                { "aarch64",    ARCHITECTURE_ARM64    },
+                { "aarch64_be", ARCHITECTURE_ARM64_BE },
+                { "armv4l",     ARCHITECTURE_ARM      },
+                { "armv4b",     ARCHITECTURE_ARM_BE   },
+                { "armv4tl",    ARCHITECTURE_ARM      },
+                { "armv4tb",    ARCHITECTURE_ARM_BE   },
+                { "armv5tl",    ARCHITECTURE_ARM      },
+                { "armv5tb",    ARCHITECTURE_ARM_BE   },
+                { "armv5tel",   ARCHITECTURE_ARM      },
+                { "armv5teb" ,  ARCHITECTURE_ARM_BE   },
+                { "armv5tejl",  ARCHITECTURE_ARM      },
+                { "armv5tejb",  ARCHITECTURE_ARM_BE   },
+                { "armv6l",     ARCHITECTURE_ARM      },
+                { "armv6b",     ARCHITECTURE_ARM_BE   },
+                { "armv7l",     ARCHITECTURE_ARM      },
+                { "armv7b",     ARCHITECTURE_ARM_BE   },
+                { "armv7ml",    ARCHITECTURE_ARM      },
+                { "armv7mb",    ARCHITECTURE_ARM_BE   },
+                { "armv4l",     ARCHITECTURE_ARM      },
+                { "armv4b",     ARCHITECTURE_ARM_BE   },
+                { "armv4tl",    ARCHITECTURE_ARM      },
+                { "armv4tb",    ARCHITECTURE_ARM_BE   },
+                { "armv5tl",    ARCHITECTURE_ARM      },
+                { "armv5tb",    ARCHITECTURE_ARM_BE   },
+                { "armv5tel",   ARCHITECTURE_ARM      },
+                { "armv5teb",   ARCHITECTURE_ARM_BE   },
+                { "armv5tejl",  ARCHITECTURE_ARM      },
+                { "armv5tejb",  ARCHITECTURE_ARM_BE   },
+                { "armv6l",     ARCHITECTURE_ARM      },
+                { "armv6b",     ARCHITECTURE_ARM_BE   },
+                { "armv7l",     ARCHITECTURE_ARM      },
+                { "armv7b",     ARCHITECTURE_ARM_BE   },
+                { "armv7ml",    ARCHITECTURE_ARM      },
+                { "armv7mb",    ARCHITECTURE_ARM_BE   },
+                { "armv8l",     ARCHITECTURE_ARM      },
+                { "armv8b",     ARCHITECTURE_ARM_BE   },
+#elif defined(__sh__) || defined(__sh64__)
+                { "sh64",       ARCHITECTURE_SH64     },
+                { "sh",         ARCHITECTURE_SH       },
+#elif defined(__m68k__)
+                { "m68k",       ARCHITECTURE_M68K     },
+#else
+#error "Please register your architecture here!"
+#endif
+        };
+
+        static Architecture cached = _ARCHITECTURE_INVALID;
+        struct utsname u;
+        unsigned i;
+
+        if (cached != _ARCHITECTURE_INVALID)
+                return cached;
+
+        assert_se(uname(&u) >= 0);
+
+        for (i = 0; i < ELEMENTSOF(arch_map); i++)
+                if (streq(arch_map[i].machine, u.machine))
+                        return cached = arch_map[i].arch;
+
+        assert_not_reached("Couldn't identify architecture. You need to patch systemd.");
+        return _ARCHITECTURE_INVALID;
+}
+
+static const char *const architecture_table[_ARCHITECTURE_MAX] = {
+        [ARCHITECTURE_X86] = "x86",
+        [ARCHITECTURE_X86_64] = "x86-64",
+        [ARCHITECTURE_PPC] = "ppc",
+        [ARCHITECTURE_PPC64] = "ppc64",
+        [ARCHITECTURE_IA64] = "ia64",
+        [ARCHITECTURE_PARISC] = "parisc",
+        [ARCHITECTURE_PARISC64] = "parisc64",
+        [ARCHITECTURE_S390] = "s390",
+        [ARCHITECTURE_S390X] = "s390x",
+        [ARCHITECTURE_SPARC] = "sparc",
+        [ARCHITECTURE_SPARC64] = "sparc64",
+        [ARCHITECTURE_MIPS] = "mips",
+        [ARCHITECTURE_MIPS64] = "mips64",
+        [ARCHITECTURE_ALPHA] = "alpha",
+        [ARCHITECTURE_ARM] = "arm",
+        [ARCHITECTURE_ARM_BE] = "arm-be",
+        [ARCHITECTURE_ARM64] = "arm64",
+        [ARCHITECTURE_ARM64_BE] = "arm64-be",
+        [ARCHITECTURE_SH] = "sh",
+        [ARCHITECTURE_SH64] = "sh64",
+        [ARCHITECTURE_M68K] = "m68k",
+};
+
+DEFINE_STRING_TABLE_LOOKUP(architecture, Architecture);