Initial release

1 files changed, 74 insertions, 0 deletions

diff --git a/smm.c b/smm.c
new file mode 100644
index 000000000000..4d16f32fe95e
--- /dev/null
+++ b/smm.c
@@ -0,0 +1,74 @@
+/*
+ * smm.c -- Utility to test SMM BIOS calls on Inspiron 8000 laptops
+ *
+ * Copyright (C) 2017 Vitor Augusto <vitorafsr@gmail.com>
+ * Copyright (C) 2001  Massimo Dal Zotto <dz@debian.org>
+ *
+ * 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, 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.
+ *
+ * WARNING!!! READ CAREFULLY BEFORE USING THIS PROGRAM!!!
+ *
+ * THIS PROGRAM IS VERY DANGEROUS. IT CAN CRASH YOUR COMPUTER, DESTROY DATA
+ * ON THE HARDISK, CORRUPT THE BIOS, PHYSICALLY DAMAGE YOUR HARDWARE AND
+ * MAKE YOUR COMPUTER TOTALLY UNUSABLE.
+ *
+ * DON'T USE THIS PROGRAM UNLESS YOU REALLY KNOW WHAT YOU ARE DOING. I WILL
+ * NOT BE RESPONSIBLE FOR ANY DIRECT OR INDIRECT DAMAGE CAUSED BY USING THIS
+ * PROGRAM.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <sys/io.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+
+#define I8K_SMM		_IOWR('i', 0x88, size_t)
+
+int
+main(int argc, char **argv)
+{
+	int registers[6];
+	if (argc < 2) {
+		fprintf(stderr, "Usage: %s eax ebx ecx edx esi edi\n", argv[0]);
+		exit(1);
+	}
+
+    if (argc > 1) registers[0] = strtol(argv[1],NULL,16);
+    if (argc > 2) registers[1] = strtol(argv[2],NULL,16);
+    if (argc > 3) registers[2] = strtol(argv[3],NULL,16);
+    if (argc > 4) registers[3] = strtol(argv[4],NULL,16);
+    if (argc > 5) registers[4] = strtol(argv[5],NULL,16);
+    if (argc > 6) registers[5] = strtol(argv[6],NULL,16);
+
+	int fp = open("/proc/i8k", O_WRONLY);
+	if (fp == -1) {
+		perror("Error opening file /proc/i8k\n");
+		return -1;
+	}
+
+	fp = ioctl(fp, I8K_SMM, &registers);
+	if (fp == -1) {
+		perror("Error on ioctl\n");
+		fprintf(stderr, "Err no. %d\n", fp);
+		close(fp);
+		return -1;
+	}
+
+	close(fp);
+
+    return 0;
+}
+
+/* end of file */