uefi: Fix shell_get_execution_break_flag() to check execution_break event

get_page_break only returns whether page break mode is enabled, not
whether the user requested an execution break (e.g. by pressing 'q'
during pagination or Ctrl+C). Use boot::check_event on the
execution_break Event instead, matching the edk2 ShellGetExecutionBreakFlag
implementation.

Signed-off-by: Daniel Schaefer <dhs@frame.work>

Author: JohnAZoidberg

framework_lib/src/fw_uefi/mod.rs

@@ -39,7 +39,13 @@ fn get_shell_protocol() -> &'static ShellProtocol {
 /// Returns true when the execution break was requested, false otherwise
 pub fn shell_get_execution_break_flag() -> bool {
     let shell = get_shell_protocol();
-    unsafe { (shell.get_page_break)().into() }
+    let raw_event = shell.execution_break;
+    // SAFETY: The execution_break event is created by the shell and remains valid
+    if let Some(event) = unsafe { uefi::Event::from_ptr(raw_event) } {
+        boot::check_event(event).unwrap_or(false)
+    } else {
+        false
+    }
 }
 
 /// Enable pagination in UEFI shell