xref: /reactos/ntoskrnl/ke/amd64/boot.S (revision 40462c92) 
1/*
2 * FILE:            ntoskrnl/ke/amd64/boot.S
3 * COPYRIGHT:       See COPYING in the top level directory
4 * PURPOSE:         FreeLDR Wrapper Bootstrap Code and Bootstrap Trampoline
5 * PROGRAMMER:      Timo Kreuzer (timo.kreuzer@reactos.org)
6 */
7
8/* INCLUDES ******************************************************************/
9
10#include <asm.inc>
11#include <ksamd64.inc>
12
13EXTERN KiSystemStartupBootStack:PROC
14
15/* GLOBALS *******************************************************************/
16
17
18/* FUNCTIONS *****************************************************************/
19
20.code64
21
22/**
23 * VOID
24 * KiSwitchToBootStack(
25 *     IN ULONG_PTR InitialStack<rcx>)
26 */
27PUBLIC KiSwitchToBootStack
28.PROC KiSwitchToBootStack
29
30    /* Setup the new stack */
31    mov ax, HEX(18)
32    mov ss, ax
33    mov rsp, rcx
34    // Note: 8 bytes extra to compensate for the missing return address on
35    // the stack. On function entry the stack is unaligned by 8!!
36    sub rsp, HEX(308) // FIXME
37    .ENDPROLOG
38
39    jmp KiSystemStartupBootStack
40
41.ENDP
42
43END
44
45