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authorJohn Denker <jsd@av8n.com>2012-06-03 01:38:28 (GMT)
committerJohn Denker <jsd@av8n.com>2012-06-03 01:38:28 (GMT)
commit78488dc84afac1398e582ae6bbaf9606d07afa1e (patch)
tree71723e916f23a6a07422587de275dece3ea60252 /checkpasswd/x86cpuid.c
parent81b5f8f3ab26a7969956faef29a90499ece40ff5 (diff)
checkpassword ... as downloaded
Diffstat (limited to 'checkpasswd/x86cpuid.c')
-rw-r--r--checkpasswd/x86cpuid.c38
1 files changed, 38 insertions, 0 deletions
diff --git a/checkpasswd/x86cpuid.c b/checkpasswd/x86cpuid.c
new file mode 100644
index 0000000..900d7d5
--- /dev/null
+++ b/checkpasswd/x86cpuid.c
@@ -0,0 +1,38 @@
+#include <signal.h>
+
+void nope()
+{
+ exit(1);
+}
+
+main()
+{
+ unsigned long x[4];
+ unsigned long y[4];
+ int i;
+ int j;
+ char c;
+
+ signal(SIGILL,nope);
+
+ x[0] = 0;
+ x[1] = 0;
+ x[2] = 0;
+ x[3] = 0;
+
+ asm volatile(".byte 15;.byte 162" : "=a"(x[0]),"=b"(x[1]),"=c"(x[3]),"=d"(x[2]) : "0"(0) );
+ if (!x[0]) return 0;
+ asm volatile(".byte 15;.byte 162" : "=a"(y[0]),"=b"(y[1]),"=c"(y[2]),"=d"(y[3]) : "0"(1) );
+
+ for (i = 1;i < 4;++i)
+ for (j = 0;j < 4;++j) {
+ c = x[i] >> (8 * j);
+ if (c < 32) c = 32;
+ if (c > 126) c = 126;
+ putchar(c);
+ }
+
+ printf("-%08x-%08x\n",y[0],y[3]);
+
+ return 0;
+}