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/* imvirt / VMware detection code
*
* Authors:
* Thomas Liske <liske@ibh.de>
*
* Copyright Holder:
* 2009 - 2012 (C) IBH IT-Service GmbH [http://www.ibh.de/]
*
* License:
* 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 package; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* This code tries to detect the VMware version using the VMware backdoor's
* GETVERSION command (http://chitchat.at.infoseek.co.jp/vmware/backdoor.html#cmd0ah).
*/
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include "detect.h"
#define VMWARE_MAGIC 0x564d5868
#define VMWARE_PORT 0x5658
#define VMWARE_CMD_GETVERSION 0x0a
#if defined(__i386__) && defined(__PIC__)
#define VMWARE_CMD(eax, ebx, ecx, edx) \
__asm__( \
"xchgl %%ebx, %1;" \
"inl (%%dx);" \
"xchgl %%ebx, %1" \
: "+a"(eax), "+r"(ebx), "+c"(ecx), "+d"(edx) \
);
#else
#define VMWARE_CMD(eax, ebx, ecx, edx) \
__asm__("inl (%%dx)" \
: "+a"(eax), "+b"(ebx), "+c"(ecx), "+d"(edx) \
);
#endif
static void vmware_cmd(uint32_t cmd, uint32_t *eax, uint32_t *ebx, uint32_t *ecx, uint32_t *edx) {
*eax = VMWARE_MAGIC;
*ebx = 0xffffffff;
*ecx = cmd;
*edx = VMWARE_PORT;
VMWARE_CMD(*eax, *ebx, *ecx, *edx);
}
static void sigh(int signum) {
exit(0);
}
static int do_vmware() {
uint32_t eax, ebx, ecx, edx;
struct sigaction sa;
/* ignore SIGSEGV (VMWARE_CMD will cause a SEGV on none VMware systems) */
sa.sa_handler = sigh;
sigemptyset(&sa.sa_mask);
sa.sa_flags = 0;
sigaction(SIGSEGV, &sa, NULL);
vmware_cmd(VMWARE_CMD_GETVERSION, &eax, &ebx, &ecx, &edx);
/* sanity check: maybe VMWARE_CMD did not SEGV if there was something
* on the I/O port - test if EBX has been set to VMWARE_MAGIC */
if ((uint32_t)-1 && ebx == VMWARE_MAGIC) {
char *product;
switch(ecx) {
case 0x01:
product = "Express";
break;
case 0x02:
product = "ESX Server";
break;
case 0x03:
product = "GSX Server";
break;
case 0x04:
product = "Workstation";
break;
default:
product = "?";
break;
}
printf("%s\n", product);
return 1;
}
return 0;
}
int main(int argc, char **argv) {
helper_main(argc, argv);
pid_t pid = fork();
switch (pid) {
case 0:
exit(do_vmware());
case -1:
return 0;
}
int status;
waitpid(pid, &status, 0);
if (WIFEXITED(status))
return WEXITSTATUS(status);
return 0;
}
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