/* * cpu to uname machine name map * * Copyright (c) 2009 Loïc Minier * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "qemu/osdep.h" #include "qemu.h" //#include "qemu-common.h" #include "uname.h" /* return highest utsname machine name for emulated instruction set * * NB: the default emulated CPU ("any") might not match any existing CPU, e.g. * on ARM it has all features turned on, so there is no perfect arch string to * return here */ const char *cpu_to_uname_machine(void *cpu_env) { #if defined(TARGET_ARM) && !defined(TARGET_AARCH64) /* utsname machine name on linux arm is CPU arch name + endianness, e.g. * armv7l; to get a list of CPU arch names from the linux source, use: * grep arch_name: -A1 linux/arch/arm/mm/proc-*.S * see arch/arm/kernel/setup.c: setup_processor() */ /* in theory, endianness is configurable on some ARM CPUs, but this isn't * used in user mode emulation */ #ifdef TARGET_WORDS_BIGENDIAN #define utsname_suffix "b" #else #define utsname_suffix "l" #endif if (arm_feature(cpu_env, ARM_FEATURE_V7)) return "armv7" utsname_suffix; if (arm_feature(cpu_env, ARM_FEATURE_V6)) return "armv6" utsname_suffix; /* earliest emulated CPU is ARMv5TE; qemu can emulate the 1026, but not its * Jazelle support */ return "armv5te" utsname_suffix; #elif defined(TARGET_I386) && !defined(TARGET_X86_64) /* see arch/x86/kernel/cpu/bugs.c: check_bugs(), 386, 486, 586, 686 */ CPUState *cpu = ENV_GET_CPU((CPUX86State *)cpu_env); int family = object_property_get_int(OBJECT(cpu), "family", NULL); if (family == 4) { return "i486"; } if (family == 5) { return "i586"; } return "i686"; #else /* default is #define-d in each arch/ subdir */ return UNAME_MACHINE; #endif } #define COPY_UTSNAME_FIELD(dest, src) \ do { \ /* __NEW_UTS_LEN doesn't include terminating null */ \ (void) strncpy((dest), (src), __NEW_UTS_LEN); \ (dest)[__NEW_UTS_LEN] = '\0'; \ } while (0) int sys_uname(struct new_utsname *buf) { struct utsname uts_buf; if (uname(&uts_buf) < 0) return (-1); /* * Just in case these have some differences, we * translate utsname to new_utsname (which is the * struct linux kernel uses). */ memset(buf, 0, sizeof(*buf)); COPY_UTSNAME_FIELD(buf->sysname, uts_buf.sysname); COPY_UTSNAME_FIELD(buf->nodename, uts_buf.nodename); COPY_UTSNAME_FIELD(buf->release, uts_buf.release); COPY_UTSNAME_FIELD(buf->version, uts_buf.version); COPY_UTSNAME_FIELD(buf->machine, uts_buf.machine); #ifdef _GNU_SOURCE COPY_UTSNAME_FIELD(buf->domainname, uts_buf.domainname); #endif return (0); #undef COPY_UTSNAME_FIELD } static int relstr_to_int(const char *s) { /* Convert a uname release string like "2.6.18" to an integer * of the form 0x020612. (Beware that 0x020612 is *not* 2.6.12.) */ int i, n, tmp; tmp = 0; for (i = 0; i < 3; i++) { n = 0; while (*s >= '0' && *s <= '9') { n *= 10; n += *s - '0'; s++; } tmp = (tmp << 8) + n; if (*s == '.') { s++; } } return tmp; } int get_osversion(void) { static int osversion; struct new_utsname buf; const char *s; if (osversion) return osversion; if (qemu_uname_release && *qemu_uname_release) { s = qemu_uname_release; } else { if (sys_uname(&buf)) return 0; s = buf.release; } osversion = relstr_to_int(s); return osversion; } void init_qemu_uname_release(void) { /* Initialize qemu_uname_release for later use. * If the host kernel is too old and the user hasn't asked for * a specific fake version number, we might want to fake a minimum * target kernel version. */ struct new_utsname buf; if (qemu_uname_release && *qemu_uname_release) { return; } if (sys_uname(&buf)) { return; } if (relstr_to_int(buf.release) < relstr_to_int(UNAME_MINIMUM_RELEASE)) { qemu_uname_release = UNAME_MINIMUM_RELEASE; } }