Fixes from PR

- Update system table crc32

Signed-off-by: Ayush Singh <ayushdevel1325@gmail.com>

Author: Ayush1325

library/std/src/sys/pal/uefi/process.rs

@@ -393,7 +393,9 @@ mod uefi_command_internal {
             }
         }
 
-        pub fn start_image(&self) -> io::Result<r_efi::efi::Status> {
+        pub fn start_image(&mut self) -> io::Result<r_efi::efi::Status> {
+            self.update_st_crc32()?;
+
             let boot_services: NonNull<r_efi::efi::BootServices> = boot_services()
                 .ok_or_else(|| const_io_error!(io::ErrorKind::NotFound, "Boot Services not found"))?
                 .cast();
@@ -476,6 +478,27 @@ mod uefi_command_internal {
 
             self.args = Some(args);
         }
+
+        fn update_st_crc32(&mut self) -> io::Result<()> {
+            let bt: NonNull<r_efi::efi::BootServices> = boot_services().unwrap().cast();
+            let st_size = self.st.hdr.header_size as usize;
+            let mut crc32: u32 = 0;
+
+            let r = unsafe {
+                ((*bt.as_ptr()).calculate_crc32)(
+                    self.st.as_mut() as *mut r_efi::efi::SystemTable as *mut crate::ffi::c_void,
+                    st_size,
+                    &mut crc32,
+                )
+            };
+
+            if r.is_error() {
+                Err(io::Error::from_raw_os_error(r.as_usize()))
+            } else {
+                self.st.hdr.crc32 = crc32;
+                Ok(())
+            }
+        }
     }
 
     impl Drop for Command {