Commit b75e2b07 authored by Arvind Sankar's avatar Arvind Sankar Committed by Ard Biesheuvel

x86/boot: GDT limit value should be size - 1

The limit value for the GDTR should be such that adding it to the base
address gives the address of the last byte of the GDT, i.e. it should be
one less than the size, not the size.
Signed-off-by: default avatarArvind Sankar <nivedita@alum.mit.edu>
Link: https://lore.kernel.org/r/20200202171353.3736319-7-nivedita@alum.mit.eduSigned-off-by: default avatarArd Biesheuvel <ardb@kernel.org>
parent ef5a7b5e
...@@ -624,12 +624,12 @@ SYM_FUNC_END(.Lno_longmode) ...@@ -624,12 +624,12 @@ SYM_FUNC_END(.Lno_longmode)
.data .data
SYM_DATA_START_LOCAL(gdt64) SYM_DATA_START_LOCAL(gdt64)
.word gdt_end - gdt .word gdt_end - gdt - 1
.quad 0 .quad 0
SYM_DATA_END(gdt64) SYM_DATA_END(gdt64)
.balign 8 .balign 8
SYM_DATA_START_LOCAL(gdt) SYM_DATA_START_LOCAL(gdt)
.word gdt_end - gdt .word gdt_end - gdt - 1
.long gdt .long gdt
.word 0 .word 0
.quad 0x00cf9a000000ffff /* __KERNEL32_CS */ .quad 0x00cf9a000000ffff /* __KERNEL32_CS */
......
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