compiler/rustc_error_codes/src/error_codes/E0781.md

   1 The `C-cmse-nonsecure-call` ABI can only be used with function pointers.
   2
   3 Erroneous code example:
   4
   5 ```compile_fail,E0781
   6 #![feature(abi_c_cmse_nonsecure_call)]
   7
   8 pub extern "C-cmse-nonsecure-call" fn test() {}
   9 ```
  10
  11 The `C-cmse-nonsecure-call` ABI should be used by casting function pointers to
  12 specific addresses.