merged mikas trees

[grml-scripts.git] / compile / vmware-detect.c

diff --git a/compile/vmware-detect.c b/compile/vmware-detect.c
index 8ee1a7c..c096460 100644 (file)
--- a/compile/vmware-detect.c
+++ b/compile/vmware-detect.c
@@ -1,114 +1,25 @@
-#include "string.h"
-#include "unistd.h"
-#include "stdio.h"
-#include "stdlib.h"
-
-#define WRITE(x) write(1, x, strlen(x))
-#define DWRITE(x) do{ \
-    if(debug) { \
-        WRITE(x); \
-    } \
-} while(0);
-#define FALSE 0
-#define TRUE !FALSE
-
-// from libowfat {{{
-static inline char tohex(char c) {
-  return c>=10?c-10+'a':c+'0';
-}
-
-unsigned int fmt_xlong(char *dest,unsigned long i) {
-  register unsigned long len,tmp;
-  /* first count the number of bytes needed */
-  for (len=1, tmp=i; tmp>15; ++len) tmp>>=4;
-  if (dest)
-    for (tmp=i, dest+=len; ; ) {
-      *--dest = tohex(tmp&15);
-      if (!(tmp>>=4)) break;
-    }
-  return len;
-}
-// }}}
-
-void printIdtr(const unsigned char* idtr, unsigned size)
-{
-    unsigned i;
-    for(i=0; i<=size; ++i) {
-        char out[4] = {0};
-        fmt_xlong(out, idtr[i]);
-        WRITE(out);
-    }
-    WRITE("\n");
-}
-
 #if defined (__i386__)
-int checkVmware(const int debug)
+int checkVmware()
 {
-    unsigned char idtr[6] = {0};
+    unsigned char idtr[6];
     asm("sidt %0" : "=m" (idtr));
-    if(debug)
-        printIdtr(idtr, 6);
-    return (0xff==idtr[5]) ? 1 : 0;
-}
-int checkVmwareIO()
-{
-    unsigned int vmaj, vmin, magic, dout;
-    __asm__ __volatile__(
-            "mov $0x564D5868, %%eax; /* magic number */"
-            "mov $0x3c6cf712, %%ebx; /* random number */"
-            "mov $0x0000000A, %%ecx; /* specifies command */"
-            "mov $0x5658, %%edx; /* VMware I/O port */"
-            "in %%dx, %%eax;"
-            "mov %%eax, %0;"
-            "mov %%ebx, %1;"
-            "mov %%ecx, %2;"
-            "mov %%edx, %3;"
-        : "=r"(vmaj), "=r"(magic), "=r"(vmin), "=r"(dout));
-    return (0x564D5868 == magic) ? 1 : 0;
+    return (0xff==idtr[5]) ? 0 : 1;
 }
 #elif defined (__x86_64__)
 // only guessed, possible need to check against 0xffff?
-int checkVmware(const int debug)
+int checkVmware()
 {
     unsigned char idtr[10];
     asm("sidt %0" : "=m" (idtr));
-    if(debug)
-        printIdtr(idtr, 10);
-    return (0xff==idtr[9]) ? 1 : 0;
+    return (0xff==idtr[9]) ? 0 : 1;
 }
-int checkVmwareIO() { return 0; }
 #else
 // vmware runs only on the archs above
-int checkVmware(const int) { return 0; }
-int checkVmwareIO() { return 0; }
+int checkVmware() { return 1; }
 #endif
 
-// returns 0 if running inside vmware, 1 otherwise
-int main(int argc, char* argv[]) {
-    int debug = FALSE;
-    if(argc == 2 && !strcmp(argv[1], "--debug"))
-        debug = TRUE;
-
-    int a, b;
-    // known to be false positives
-    a = checkVmware(debug);
-    DWRITE("idt-check: ")
-    if(!a) {
-        DWRITE("false\n");
-        return 1;
-    }
-    DWRITE("true\n");
-
-    // never returns if not running under vmware
-    void dummy() { DWRITE("false\n"); exit(1); }
-    signal(SIGSEGV, dummy);
-    DWRITE("ioport-check: ");
-    b = checkVmwareIO();
-    if(b) {
-        DWRITE("true\n");
-        return 0;
-    }
-    // never reached
-    return 1;
+int main() {
+    // returns 0 if running inside vmware, 1 otherwise
+    return checkVmware();
 }
 // vim: foldmethod=marker