add: RPM

src/TaxiDriver.c

@@ -1,4 +1,5 @@
 #include <linux/init.h>
+#include <linux/mm.h>
 #include <linux/module.h>
 #include <linux/fs.h>
 #include <linux/kernel.h>
@@ -22,6 +23,26 @@ static int device_release(struct inode *inode, struct file *file)
     return 0;
 }
 
+int RPM(t_RPM args) {
+    struct mm_struct *mm;
+    unsigned long value = 0;
+
+    printk(KERN_ALERT "TaxiDriver: RPM --> addr : 0x%lx, size : %ld\n", rpm_args.addr, rpm_args.size);
+    if (args.addr == 0)
+	return -1;
+    mm = get_task_mm(task);
+    if (mm != NULL) {
+        if (access_process_vm(task, args.addr, &value, args.size, 0) == args.size) {
+	    printk(KERN_INFO "TaxiDriver: Value at 0x%lx: %lu\n", args.addr, value);
+	    mmput(mm);
+	} else {
+	    printk(KERN_INFO "TaxiDriver: Failed to read value at 0x%lx\n", args.addr);
+	    return -1;
+	}
+    }
+    return (int)value;
+}
+
 static int init_process_by_pid(int target_pid) {
     printk(KERN_INFO "TaxiDriver: Accessing process with PID: %d\n", target_pid);
 
@@ -64,8 +85,7 @@ static long device_ioctl(struct file *file, unsigned int ioctl_num, unsigned lon
         case IOCTL_RPM:
             if (copy_from_user(&rpm_args, (int *)arg, sizeof(t_RPM)))
                 return -EFAULT;
-	    printk(KERN_ALERT "TaxiDriver: RPM --> addr : %ld, size : %ld\n", rpm_args.addr, rpm_args.size);
+	    return_value = RPM(rpm_args);
-	    return_value = 1337;
             break;
 
         case IOCTL_WPM:

src/client/main.c

@@ -4,18 +4,18 @@ int main() {
     if (!open_device())
 	return -1;
 
-    int pid = 25801;
+    int pid = 55803;
     if (!open_process(pid))
 	return -1;
     
     struct s_RPM args;
-    args.addr = 0x420;
+    args.addr = 0x55a813479d70;
-    args.size = 4;
+    args.size = sizeof(int);
     int val = (int)RPM(args);
     printf("Value from RPM: %d\n", val);
 
     struct s_WPM args_wpm;
-    args_wpm.addr = 0x420;
+    args_wpm.addr = 0x55a813479d7;
     args_wpm.size = 4;
     args_wpm.value = (uintptr_t)667;
     WPM(args_wpm);