asm: add puts() macro to display strings

Signed-off-by: Pawel Wieczorkiewicz <[email protected]>
KernelTestFramework · Oct 28, 2020 · ccdb3fb · ccdb3fb
1 parent 812b6d1
commit ccdb3fb
Showing 1 changed file with 9 additions and 0 deletions.
diff --git a/include/arch/x86/asm-macros.h b/include/arch/x86/asm-macros.h
@@ -56,6 +56,15 @@
   outb %al, %dx;
 .endm
 
+.macro puts addr len
+    movw (com_ports), %dx
+    mov $\addr, %si
+    mov $\len, %cx
+
+    cld
+    rep outsb
+.endm
+
 .macro SAVE_REGS
     push %_ASM_AX
     push %_ASM_BX