We enabled X64 native version NT32, and made it works on Windows 7 X64 OS.

[mirror_edk2.git] / Nt32Pkg / Sec / StackX64.asm

;------------------------------------------------------------------------------\r
;\r
; Copyright (c) 2013, Intel Corporation. All rights reserved.<BR>\r
; This program and the accompanying materials\r
; are licensed and made available under the terms and conditions of the BSD License\r
; which accompanies this distribution.  The full text of the license may be found at\r
; http://opensource.org/licenses/bsd-license.php\r
;\r
; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r
; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r
;\r
; Module Name:\r
;\r
;   Stack.asm\r
;\r
; Abstract:\r
;\r
;   Switch the stack from temporary memory to permenent memory.\r
;\r
;------------------------------------------------------------------------------\r
\r
    .code\r
    \r
;------------------------------------------------------------------------------\r
; VOID\r
; EFIAPI\r
; SecSwitchStack (\r
;   UINT32   TemporaryMemoryBase,\r
;   UINT32   PermenentMemoryBase\r
;   );\r
;------------------------------------------------------------------------------    \r
SecSwitchStack   PROC\r
    mov [rsp + 08h], rcx\r
    mov [rsp + 10h], rdx\r
\r
    ;\r
    ; Save three register: eax, ebx, ecx\r
    ;\r
    push  rax\r
    push  rbx\r
    push  rcx\r
    push  rdx\r
    \r
    ;\r
    ; !!CAUTION!! this function address's is pushed into stack after\r
    ; migration of whole temporary memory, so need save it to permenent\r
    ; memory at first!\r
    ;\r
    \r
    mov   rbx, [rsp + 28h]          ; Save the first parameter\r
    mov   rcx, [rsp + 30h]          ; Save the second parameter\r
    \r
    ;\r
    ; Save this function's return address into permenent memory at first.\r
    ; Then, Fixup the esp point to permenent memory\r
    ;\r
    mov   rax, rsp\r
    sub   rax, rbx\r
    add   rax, rcx\r
    mov   rdx, qword ptr [rsp]         ; copy pushed register's value to permenent memory\r
    mov   qword ptr [rax], rdx    \r
    mov   rdx, qword ptr [rsp + 8]\r
    mov   qword ptr [rax + 8], rdx    \r
    mov   rdx, qword ptr [rsp + 10h]\r
    mov   qword ptr [rax + 10h], rdx    \r
    mov   rdx, qword ptr [rsp + 18h]\r
    mov   qword ptr [rax + 18h], rdx    \r
    mov   rdx, qword ptr [rsp + 20h]    ; Update this function's return address into permenent memory\r
    mov   qword ptr [rax + 20h], rdx    \r
    mov   rsp, rax                     ; From now, esp is pointed to permenent memory\r
        \r
    ;\r
    ; Fixup the ebp point to permenent memory\r
    ;\r
    mov   rax, rbp\r
    sub   rax, rbx\r
    add   rax, rcx\r
    mov   rbp, rax                ; From now, ebp is pointed to permenent memory\r
    \r
    pop   rdx\r
    pop   rcx\r
    pop   rbx\r
    pop   rax\r
    ret\r
SecSwitchStack   ENDP\r
\r
;------------------------------------------------------------------------------\r
; VOID\r
; EFIAPI\r
; PeiSwitchStacks (\r
;   IN      SWITCH_STACK_ENTRY_POINT  EntryPoint,\r
;   IN      VOID                      *Context1,  OPTIONAL\r
;   IN      VOID                      *Context2,  OPTIONAL\r
;   IN      VOID                      *Context3,  OPTIONAL\r
;   IN      VOID                      *NewStack\r
;   )\r
;------------------------------------------------------------------------------\r
PeiSwitchStacks   PROC\r
    mov  rax, rcx\r
    mov  rcx, rdx\r
    mov  rdx, r8\r
    mov  r8, r9\r
    mov  rsp, [rsp + 28h]\r
    sub  rsp, 20h\r
    call rax\r
    jmp $\r
    ret\r
PeiSwitchStacks   ENDP\r
\r
    END\r