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/*
* 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 "user-internals.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(CPUArchState *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 */
#if TARGET_BIG_ENDIAN
#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_cpu(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 { \
memcpy((dest), (src), MIN(sizeof(src), sizeof(dest))); \
(dest)[sizeof(dest) - 1] = '\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;
}
}
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