OvmfPkg LoadLinuxLib: Convert X64/JumpToKernel.asm to NASM

The BaseTools/Scripts/ConvertMasmToNasm.py script was used to convert
X64/JumpToKernel.asm to X64/JumpToKernel.nasm

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jordan Justen <jordan.l.justen@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16288 6f19259b-4bc3-4df7-8a09-765794883524

3 files changed, 33 insertions, 127 deletions

diff --git a/OvmfPkg/Library/LoadLinuxLib/LoadLinuxLib.inf b/OvmfPkg/Library/LoadLinuxLib/LoadLinuxLib.inf
index 0d98c26f0b..12d2f4f084 100644
--- a/OvmfPkg/Library/LoadLinuxLib/LoadLinuxLib.inf
+++ b/OvmfPkg/Library/LoadLinuxLib/LoadLinuxLib.inf
@@ -34,8 +34,7 @@
   Ia32/JumpToKernel.nasm

 

 [Sources.X64]

-  X64/JumpToKernel.asm

-  X64/JumpToKernel.S

+  X64/JumpToKernel.nasm

 

 [Packages]

   MdePkg/MdePkg.dec

diff --git a/OvmfPkg/Library/LoadLinuxLib/X64/JumpToKernel.S b/OvmfPkg/Library/LoadLinuxLib/X64/JumpToKernel.S
deleted file mode 100644
index 056e3c013f..0000000000
--- a/OvmfPkg/Library/LoadLinuxLib/X64/JumpToKernel.S
+++ /dev/null
@@ -1,91 +0,0 @@
-#------------------------------------------------------------------------------

-#

-# Copyright (c) 2006 - 2013, Intel Corporation. All rights reserved.<BR>

-#

-# This program and the accompanying materials

-# are licensed and made available under the terms and conditions of the BSD License

-# which accompanies this distribution.  The full text of the license may be found at

-# http://opensource.org/licenses/bsd-license.php.

-#

-# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,

-# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

-#

-#------------------------------------------------------------------------------

-

-ASM_GLOBAL ASM_PFX(JumpToKernel)

-ASM_GLOBAL ASM_PFX(JumpToUefiKernel)

-

-#------------------------------------------------------------------------------

-# VOID

-# EFIAPI

-# JumpToKernel (

-#   VOID *KernelStart,         // %rcx

-#   VOID *KernelBootParams     // %rdx

-#   );

-#------------------------------------------------------------------------------

-ASM_PFX(JumpToKernel):

-

-    // Set up for executing kernel. BP in %esi, entry point on the stack

-    // (64-bit when the 'ret' will use it as 32-bit, but we're little-endian)

-    movq    %rdx, %rsi

-    pushq   %rcx

-

-    // Jump into the compatibility mode CS

-    pushq   $0x10

-    leaq    1f(%rip), %rax

-    pushq   %rax

-    .byte   0x48, 0xcb                      // retfq

-

-1:  // Now in compatibility mode

-.code32

-    movl    $0x18, %eax

-    movl    %eax, %ds

-    movl    %eax, %es

-    movl    %eax, %fs

-    movl    %eax, %gs

-    movl    %eax, %ss

-

-    // Disable paging

-    movl    %cr0, %eax

-    btcl    $31, %eax

-    movl    %eax, %cr0

-

-    // Disable long mode in EFER

-    movl    $0x0c0000080, %ecx

-    rdmsr

-    btcl    $8, %eax

-    wrmsr

-

-    // Disable PAE

-    movl    %cr4, %eax

-    btcl    $5, %eax

-    movl    %eax, %cr4

-

-    // Zero registers and 'return' to kernel

-    xorl    %ebp, %ebp

-    xorl    %edi, %edi

-    xorl    %ebx, %ebx

-    ret

-.code64

-

-#------------------------------------------------------------------------------

-# VOID

-# EFIAPI

-# JumpToUefiKernel (

-#   EFI_HANDLE ImageHandle,        // rcx

-#   EFI_SYSTEM_TABLE *SystemTable, // rdx

-#   VOID *KernelBootParams,        // r8

-#   VOID *KernelStart              // r9

-#   );

-#------------------------------------------------------------------------------

-ASM_PFX(JumpToUefiKernel):

-    movq    %rcx, %rdi

-    movq    %rdx, %rsi

-    movq    %r8, %rdx

-    xor     %rax, %rax

-    movl    0x264(%r8), %eax

-    addq    %rax, %r9

-    addq    $0x200, %r9

-    callq   %r9

-    ret

-

diff --git a/OvmfPkg/Library/LoadLinuxLib/X64/JumpToKernel.asm b/OvmfPkg/Library/LoadLinuxLib/X64/JumpToKernel.nasm
index fc07eab684..128dcef0f6 100644
--- a/OvmfPkg/Library/LoadLinuxLib/X64/JumpToKernel.asm
+++ b/OvmfPkg/Library/LoadLinuxLib/X64/JumpToKernel.nasm
@@ -12,7 +12,8 @@
 ;

 ;------------------------------------------------------------------------------

 

-  .code

+  DEFAULT REL

+  SECTION .text

 

 ;------------------------------------------------------------------------------

 ; VOID

@@ -22,7 +23,8 @@
 ;   VOID *KernelBootParams     // rdx

 ;   );

 ;------------------------------------------------------------------------------

-JumpToKernel PROC

+global ASM_PFX(JumpToKernel)

+ASM_PFX(JumpToKernel):

 

     ; Set up for executing kernel. BP in %esi, entry point on the stack

     ; (64-bit when the 'ret' will use it as 32-bit, but we're little-endian)

@@ -30,43 +32,41 @@ JumpToKernel PROC
     push   rcx

 

     ; Jump into the compatibility mode CS

-    push    10h

-    lea     rax, @F

+    push    0x10

+    lea     rax, [.0]

     push    rax

-    DB 048h, 0cbh                      ; retfq

+    DB 0x48, 0xcb                      ; retfq

 

-@@:

+.0:

     ; Now in compatibility mode.

 

-    DB 0b8h, 018h, 000h, 000h, 000h    ; movl    $0x18, %eax

-    DB 08eh, 0d8h                      ; movl    %eax, %ds

-    DB 08eh, 0c0h                      ; movl    %eax, %es

-    DB 08eh, 0e0h                      ; movl    %eax, %fs

-    DB 08eh, 0e8h                      ; movl    %eax, %gs

-    DB 08eh, 0d0h                      ; movl    %eax, %ss

+    DB 0xb8, 0x18, 0x0, 0x0, 0x0    ; movl    $0x18, %eax

+    DB 0x8e, 0xd8                      ; movl    %eax, %ds

+    DB 0x8e, 0xc0                      ; movl    %eax, %es

+    DB 0x8e, 0xe0                      ; movl    %eax, %fs

+    DB 0x8e, 0xe8                      ; movl    %eax, %gs

+    DB 0x8e, 0xd0                      ; movl    %eax, %ss

 

     ; Disable paging

-    DB 00fh, 020h, 0c0h                ; movl    %cr0, %eax

-    DB 00fh, 0bah, 0f8h, 01fh          ; btcl    $31, %eax

-    DB 00fh, 022h, 0c0h                ; movl    %eax, %cr0

+    DB 0xf, 0x20, 0xc0                ; movl    %cr0, %eax

+    DB 0xf, 0xba, 0xf8, 0x1f          ; btcl    $31, %eax

+    DB 0xf, 0x22, 0xc0                ; movl    %eax, %cr0

 

     ; Disable long mode in EFER

-    DB 0b9h, 080h, 000h, 000h, 0c0h    ; movl    $0x0c0000080, %ecx

-    DB 00fh, 032h                      ; rdmsr

-    DB 00fh, 0bah, 0f8h, 008h          ; btcl    $8, %eax

-    DB 00fh, 030h                      ; wrmsr

+    DB 0xb9, 0x80, 0x0, 0x0, 0xc0    ; movl    $0x0c0000080, %ecx

+    DB 0xf, 0x32                      ; rdmsr

+    DB 0xf, 0xba, 0xf8, 0x8          ; btcl    $8, %eax

+    DB 0xf, 0x30                      ; wrmsr

 

     ; Disable PAE

-    DB 00fh, 020h, 0e0h                ; movl    %cr4, %eax

-    DB 00fh, 0bah, 0f8h, 005h          ; btcl    $5, %eax

-    DB 00fh, 022h, 0e0h                ; movl    %eax, %cr4

+    DB 0xf, 0x20, 0xe0                ; movl    %cr4, %eax

+    DB 0xf, 0xba, 0xf8, 0x5          ; btcl    $5, %eax

+    DB 0xf, 0x22, 0xe0                ; movl    %eax, %cr4

 

-    DB 031h, 0edh                      ; xor     %ebp, %ebp

-    DB 031h, 0ffh                      ; xor     %edi, %edi

-    DB 031h, 0dbh                      ; xor     %ebx, %ebx

-    DB 0c3h                            ; ret

-

-JumpToKernel ENDP

+    DB 0x31, 0xed                      ; xor     %ebp, %ebp

+    DB 0x31, 0xff                      ; xor     %edi, %edi

+    DB 0x31, 0xdb                      ; xor     %ebx, %ebx

+    DB 0xc3                            ; ret

 

 ;------------------------------------------------------------------------------

 ; VOID

@@ -78,18 +78,16 @@ JumpToKernel ENDP
 ;   VOID *KernelStart,             // r9

 ;   );

 ;------------------------------------------------------------------------------

-JumpToUefiKernel PROC

+global ASM_PFX(JumpToUefiKernel)

+ASM_PFX(JumpToUefiKernel):

 

     mov     rdi, rcx

     mov     rsi, rdx

     mov     rdx, r8

     xor     rax, rax

-    mov     eax, [r8 + 264h]

+    mov     eax, [r8 + 0x264]

     add     r9, rax

-    add     r9, 200h

+    add     r9, 0x200

     call    r9

     ret

 

-JumpToUefiKernel ENDP

-

-END