summary refs log tree commit diff
path: root/src/x86cpuid.c
diff options
context:
space:
mode:
authorGerrit Pape <pape@smarden.org>2002-05-18 17:30:16 +0000
committerGerrit Pape <pape@smarden.org>2002-05-18 17:30:16 +0000
commit9cc46dc719566d4665f2e584cbd0b3b250d4b7d9 (patch)
tree3102f6853180830c6ad48d40c3e5fa5ef3d21d49 /src/x86cpuid.c
parenta3b07af346564647eb28477c80cc0d1b6929246b (diff)
downloadrunit-9cc46dc719566d4665f2e584cbd0b3b250d4b7d9.tar.gz
runit-9cc46dc719566d4665f2e584cbd0b3b250d4b7d9.tar.xz
runit-9cc46dc719566d4665f2e584cbd0b3b250d4b7d9.zip
* src/: include public domain sources to build byte.a, unix.a, time.a:
    runit builds without having daemontools' sources installed.
0.3.3.
Diffstat (limited to 'src/x86cpuid.c')
-rw-r--r--src/x86cpuid.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/src/x86cpuid.c b/src/x86cpuid.c
new file mode 100644
index 0000000..f81c593
--- /dev/null
+++ b/src/x86cpuid.c
@@ -0,0 +1,40 @@
+/* Public domain. */
+
+#include <signal.h>
+
+void nope()
+{
+  exit(1);
+}
+
+int 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;
+}