diff --git a/qiling/hw/gpio/stm32f4xx_gpio.py b/qiling/hw/gpio/stm32f4xx_gpio.py
index f93e75bb..dca8d2d4 100644
--- a/qiling/hw/gpio/stm32f4xx_gpio.py
+++ b/qiling/hw/gpio/stm32f4xx_gpio.py
@@ -98,7 +98,7 @@ class STM32F4xxGpio(QlPeripheral, GpioHooks):
                     if new_bit:
                         self.set_pin(i)                        
                     else:
-                        self.reset_pin(i - 16)                        
+                        self.reset_pin(i)                        
             
             return    
         
diff --git a/qiling/os/posix/syscall/prctl.py b/qiling/os/posix/syscall/prctl.py
index fabaa3bb..3652c2bd 100644
--- a/qiling/os/posix/syscall/prctl.py
+++ b/qiling/os/posix/syscall/prctl.py
@@ -20,9 +20,9 @@ def ql_syscall_arch_prctl(ql: Qiling, code: int, addr: int):
     }
 
     if code not in handlers:
-        raise NotImplementedError(f'prctl code {code:#x} not implemented')
-
-    handlers[code]()
+        ql.log.warning(f'prctl code {code:#x} not implemented')
+    else:
+        handlers[code]()
 
     return 0
 
diff --git a/qiling/os/posix/syscall/unistd.py b/qiling/os/posix/syscall/unistd.py
index 682108bf..0f8a1f7c 100644
--- a/qiling/os/posix/syscall/unistd.py
+++ b/qiling/os/posix/syscall/unistd.py
@@ -266,7 +266,7 @@ def ql_syscall_write(ql: Qiling, fd: int, buf: int, count: int):
     except:
         regreturn = -1
     else:
-        ql.log.debug(f'write() CONTENT: {data.decode()!r}')
+        ql.log.debug(f'write() CONTENT: {bytes(data)}')
 
         if hasattr(ql.os.fd[fd], 'write'):
             ql.os.fd[fd].write(data)