diff options
Diffstat (limited to 'src/arch/x86/gdt_init.S')
| -rw-r--r-- | src/arch/x86/gdt_init.S | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/src/arch/x86/gdt_init.S b/src/arch/x86/gdt_init.S index f33a1517d8..30b39653c9 100644 --- a/src/arch/x86/gdt_init.S +++ b/src/arch/x86/gdt_init.S @@ -23,18 +23,6 @@ gdtptr: .section .init._gdt64_, "ax", @progbits .globl gdt_init64 gdt_init64: - /* Workaround a bug in the assembler. - * The following code doesn't work: - * lgdt gdtptr64 - * - * The assembler tries to save memory by using 32bit displacement addressing mode. - * Displacements are using signed integers. - * This is fine in protected mode, as the negative address points to the correct - * address > 2GiB, but in long mode this doesn't work at all. - * Tests showed that QEMU can gracefully handle it, but real CPUs can't. - * - * Use the movabs pseudo instruction to force using a 64bit absolute address. - */ movabs $gdtptr64, %rax lgdt (%rax) ret |