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Load null selectors to all data registers

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This is required for some instructions such as iretq (ss must be valid or 0).

(cherry picked from commit 8f8b46a9b6)
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Philipp Oppermann
2017-01-14 16:38:33 +01:00
parent f0df9fb937
commit a91322017e
1 changed files with 8 additions and 0 deletions
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8
src/arch/x86_64/long_mode_init.asm
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@@ -13,6 +13,14 @@ extern rust_main
section .text section .text
bits 64 bits 64
long_mode_start: long_mode_start:
; load 0 into all data segment registers
mov ax, 0
mov ss, ax
mov ds, ax
mov es, ax
mov fs, ax
mov gs, ax
; call rust main (with multiboot pointer in rdi) ; call rust main (with multiboot pointer in rdi)
call rust_main call rust_main
.os_returned: .os_returned: