The realmode test does not initialize the IDTR, assuming that its base
is zero and its limit 0x3ff. Initialize it, as the BIOS might not set it
as such.
Signed-off-by: Nadav Amit <namit@xxxxxxxxxx>
---
x86/realmode.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/x86/realmode.c b/x86/realmode.c
index 234d607..ef79f7e 100644
--- a/x86/realmode.c
+++ b/x86/realmode.c
@@ -1799,6 +1799,7 @@ void realmode_start(void)
unsigned long long r_gdt[] = { 0, 0x9b000000ffff, 0x93000000ffff };
struct table_descr r_gdt_descr = { sizeof(r_gdt) - 1, &r_gdt };
+struct table_descr r_idt_descr = { 0x3ff, 0 };
asm(
".section .init \n\t"
@@ -1819,6 +1820,7 @@ asm(
".text \n\t"
"start: \n\t"
"lgdt r_gdt_descr \n\t"
+ "lidt r_idt_descr \n\t"
"ljmp $8, $1f; 1: \n\t"
".code16gcc \n\t"
"mov $16, %eax \n\t"
--
2.20.1
