don't call slice::as_ptr

We want to avoid directly accessing the data in the .bootloader-config
section and slice::as_ptr gets a pointer to that data. Instead we cast
a reference to a reference to the data in .bootloader-config to an
address and pass that to the asm! block. The problem with as_ptr was
that it's a method on the slice and not the reference and so by
calling slice::as_ptr, we once again directly accessed the slice when
we only meant to access the reference to the reference to the data.

Author: Freax13

api/src/lib.rs

@@ -140,6 +140,6 @@ macro_rules! entry_point {
 
 #[doc(hidden)]
 pub fn __force_use(slice: &&[u8; BootloaderConfig::SERIALIZED_LEN]) {
-    let force_use = slice.as_ptr() as usize;
+    let force_use = slice as *const _ as usize;
     unsafe { core::arch::asm!("add {0}, 0", in(reg) force_use, options(nomem, nostack)) };
 }