forth

commit 56302df696f373955d894acabd53ba29d235cf43
parent d3727ac45a0773a291326f3056a42a60c508f479
Author: Christian Ermann <christianermann@gmail.com>
Date:   Sat, 25 Nov 2023 10:51:49 -0500

Fix sys_read_char

Diffstat:
M
efi.asm
 | 
9
+++++----

1 file changed, 5 insertions(+), 4 deletions(-)
diff --git a/efi.asm b/efi.asm
@@ -230,10 +230,6 @@ sys_read_char:
 ; The EFI ReadKeyStroke function actually returns a UTF-16 character but I only
 ; want to deal with ASCII characters for now.
 ;
-    mov rcx, [system_table]
-    mov rcx, [rcx + EFI_SYSTEM_TABLE.ConIn]
-    mov rbx, [rcx + SIMPLE_INPUT_INTERFACE.ReadKeyStroke]
-    mov rdx, .input_key
 
 .read_key:
 ; Call the EFI ReadKeyStroke function until a key is pressed.
@@ -242,6 +238,11 @@ sys_read_char:
 ; read, it is stored in the `.input_key` local variable through a pointer in
 ; the RDX register.
 ;
+    mov rcx, [system_table]
+    mov rcx, [rcx + EFI_SYSTEM_TABLE.ConIn]
+    mov rbx, [rcx + SIMPLE_INPUT_INTERFACE.ReadKeyStroke]
+    mov rdx, .input_key
+
     sub rsp, 32
     call rbx
     add rsp, 32