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OvmfPkg LoadLinuxLib: Use kernel's EFI entry point where available

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Usage of the EFI entry point was made feasible in the kernel
x64 boot protocol 2.12 where a 32-bit & 64-bit entry point
became well defined.

http://git.kernel.org/linus/09c205af

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14132 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
jljusten
2013-02-14 19:21:39 +00:00
parent 25ca06f9a0
commit dd71f6e287
6 changed files with 107 additions and 7 deletions
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19
OvmfPkg/Library/LoadLinuxLib/Ia32/JumpToKernel.S
View File

@@ -1,6 +1,6 @@
#------------------------------------------------------------------------------
#
# Copyright (c) 2006 - 2011, Intel Corporation. All rights reserved.<BR>
# 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
@@ -13,6 +13,7 @@
#------------------------------------------------------------------------------
ASM_GLOBAL ASM_PFX(JumpToKernel)
ASM_GLOBAL ASM_PFX(JumpToUefiKernel)
#------------------------------------------------------------------------------
# VOID
@@ -27,3 +28,19 @@ ASM_PFX(JumpToKernel):
calll 0x4(%esp)
ret
#------------------------------------------------------------------------------
# VOID
# EFIAPI
# JumpToUefiKernel (
# EFI_HANDLE ImageHandle,
# EFI_SYSTEM_TABLE *SystemTable,
# VOID *KernelBootParams,
# VOID *KernelStart
# );
#------------------------------------------------------------------------------
ASM_PFX(JumpToUefiKernel):
movl 0xc(%esp), %eax
movl 0x264(%eax), %eax
addl 0x10(%esp), %eax
jmp %eax

21
OvmfPkg/Library/LoadLinuxLib/Ia32/JumpToKernel.asm
View File

@@ -1,6 +1,6 @@
;------------------------------------------------------------------------------
;
; Copyright (c) 2006 - 2012, Intel Corporation. All rights reserved.<BR>
; 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
@@ -32,4 +32,23 @@ JumpToKernel PROC
JumpToKernel ENDP
;------------------------------------------------------------------------------
; VOID
; EFIAPI
; JumpToUefiKernel (
; EFI_HANDLE ImageHandle,
; EFI_SYSTEM_TABLE *SystemTable,
; VOID *KernelBootParams,
; VOID *KernelStart
; );
;------------------------------------------------------------------------------
JumpToUefiKernel PROC
mov eax, [esp + 12]
mov eax, [eax + 264h]
add eax, [esp + 16]
jmp eax
JumpToUefiKernel ENDP
END