linux-user/cpu-uname.c

   1 /*
   2  *  cpu to uname machine name map
   3  *
   4  *  Copyright (c) 2009 Loïc Minier
   5  *
   6  *  This program is free software; you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation; either version 2 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <stdio.h>
  21
  22 #include "qemu.h"
  23 //#include "qemu-common.h"
  24 #include "cpu-uname.h"
  25
  26 /* return highest utsname machine name for emulated instruction set
  27  *
  28  * NB: the default emulated CPU ("any") might not match any existing CPU, e.g.
  29  * on ARM it has all features turned on, so there is no perfect arch string to
  30  * return here */
  31 const char *cpu_to_uname_machine(void *cpu_env)
  32 {
  33 #if defined(TARGET_ARM) && !defined(TARGET_AARCH64)
  34
  35     /* utsname machine name on linux arm is CPU arch name + endianness, e.g.
  36      * armv7l; to get a list of CPU arch names from the linux source, use:
  37      *     grep arch_name: -A1 linux/arch/arm/mm/proc-*.S
  38      * see arch/arm/kernel/setup.c: setup_processor()
  39      */
  40
  41     /* in theory, endianness is configurable on some ARM CPUs, but this isn't
  42      * used in user mode emulation */
  43 #ifdef TARGET_WORDS_BIGENDIAN
  44 #define utsname_suffix "b"
  45 #else
  46 #define utsname_suffix "l"
  47 #endif
  48     if (arm_feature(cpu_env, ARM_FEATURE_V7))
  49         return "armv7" utsname_suffix;
  50     if (arm_feature(cpu_env, ARM_FEATURE_V6))
  51         return "armv6" utsname_suffix;
  52     /* earliest emulated CPU is ARMv5TE; qemu can emulate the 1026, but not its
  53      * Jazelle support */
  54     return "armv5te" utsname_suffix;
  55 #elif defined(TARGET_X86_64)
  56     return "x86-64";
  57 #elif defined(TARGET_I386)
  58     /* see arch/x86/kernel/cpu/bugs.c: check_bugs(), 386, 486, 586, 686 */
  59     CPUState *cpu = ENV_GET_CPU((CPUX86State *)cpu_env);
  60     int family = object_property_get_int(OBJECT(cpu), "family", NULL);
  61     if (family == 4) {
  62         return "i486";
  63     }
  64     if (family == 5) {
  65         return "i586";
  66     }
  67     return "i686";
  68 #else
  69     /* default is #define-d in each arch/ subdir */
  70     return UNAME_MACHINE;
  71 #endif
  72 }