update all segment registers when setting the GDT

not doing that caused interrupts to break on Bochs

1 files changed, 10 insertions, 0 deletions

diff --git a/platform/boot.s b/platform/boot.s
index c2a06c3..d5bfda5 100644
--- a/platform/boot.s
+++ b/platform/boot.s
@@ -34,4 +34,14 @@ halt_cpu:
 1:	hlt
 	jmp 1b
 
+// temporary, will be moved to another file soon
+.global change_cs
+.type change_cs, @function
+change_cs:
+	/* retf pops off the return address and code segment off the stack.
+	 * it turns out that in the i386 cdecl calling convention they're in
+	 * the correct place already.
+	 */
+	retf
+
 .size _start, . - _start