| 49,7 → 49,6 |
|---|
| .section K_TEXT_START, "ax" |
| .code16 |
| .global kernel_image_start |
| .global multiboot_image_start |
| kernel_image_start: |
| cli |
| xorw %ax,%ax |
| 96,21 → 95,8 |
|---|
| |
| multiboot_image_start: |
| movl $START_STACK, %esp # initialize stack pointer |
| |
| lgdt protected_bootstrap_gdtr + BOOT_OFFSET # initialize Global Descriptor Table register |
| # FIXME TODO |
| |
| movw $gdtselector(KDATA_DES), %cx |
| movw %cx, %es |
| movw %cx, %gs |
| movw %cx, %fs |
| movw %cx, %ds # kernel data + stack |
| movw %cx, %ss |
| |
| jmpl $gdtselector(KTEXT_DES), $multiboot_meeting_point + BOOT_OFFSET |
| multiboot_meeting_point: |
| |
| hlt |
| |
| # Protected 32-bit. We want to reuse the code-seg descriptor, |
| # the Default operand size must not be 1 when entering long mode |
| now_in_prot: |
| 222,8 → 208,3 |
|---|
| real_bootstrap_gdtr_boot: |
| .word gdtselector(GDT_ITEMS) |
| .long KA2PA(gdt)-BOOT_OFFSET |
| |
| .global protected_bootstrap_gdtr |
| protected_bootstrap_gdtr: |
| .word gdtselector(GDT_ITEMS) |
| .long KA2PA(gdt) |