diff options
Diffstat (limited to 'arch/x86/realmode/rm/trampoline_64.S')
| -rw-r--r-- | arch/x86/realmode/rm/trampoline_64.S | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/arch/x86/realmode/rm/trampoline_64.S b/arch/x86/realmode/rm/trampoline_64.S index 66e26f088288..1b9e1bc1ac5e 100644 --- a/arch/x86/realmode/rm/trampoline_64.S +++ b/arch/x86/realmode/rm/trampoline_64.S @@ -125,4 +125,29 @@ ENTRY(startup_64) # Now jump into the kernel using virtual addresses jmpq *tr_start(%rip) + .section ".rodata","a" + # Duplicate the global descriptor table + # so the kernel can live anywhere + .balign 16 + .globl tr_gdt +tr_gdt: + .short tr_gdt_end - tr_gdt - 1 # gdt limit + .long pa_tr_gdt + .short 0 + .quad 0x00cf9b000000ffff # __KERNEL32_CS + .quad 0x00af9b000000ffff # __KERNEL_CS + .quad 0x00cf93000000ffff # __KERNEL_DS +tr_gdt_end: + + .bss + .balign PAGE_SIZE +GLOBAL(trampoline_pgd) .space PAGE_SIZE + + .balign 8 +GLOBAL(trampoline_header) + tr_start: .space 8 + GLOBAL(tr_cr4) .space 4 + GLOBAL(tr_efer) .space 8 +END(trampoline_header) + #include "trampoline_common.S" |