49 lines
1.5 KiB
C
49 lines
1.5 KiB
C
/** @file
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Copyright (C) 2019, vit9696. All rights reserved.
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All rights reserved.
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This program and the accompanying materials
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are licensed and made available under the terms and conditions of the BSD License
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which accompanies this distribution. The full text of the license may be found at
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http://opensource.org/licenses/bsd-license.php
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THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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**/
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#include "../BootCompatInternal.h"
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#include <Library/DebugLib.h>
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VOID
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AppleMapPlatformSaveState (
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IN OUT ASM_SUPPORT_STATE *AsmState,
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OUT ASM_KERNEL_JUMP *KernelJump
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)
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{
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//
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// Save current 64-bit state - will be used later in callback from kernel jump
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// to be able to transition to 64-bit in case 32-bit kernel startup code is used.
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//
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AsmAppleMapPlatformSaveState (AsmState);
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//
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// Assembly state must fit into 32-bit address as we may jumo from 32-bit kernel
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// startup code. This is used instead of GetBootCompatContext.
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//
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ASSERT ((UINT32)(UINTN) AsmState == (UINTN) AsmState);
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gOcAbcAsmStateAddr32 = (UINT32)(UINTN) AsmState;
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//
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// Kernel trampoline for jumping to kernel.
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//
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ASSERT (
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(UINT32)(UINTN) AsmAppleMapPlatformPrepareKernelState
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== (UINTN) AsmAppleMapPlatformPrepareKernelState
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);
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KernelJump->MovInst = 0xB9;
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KernelJump->Addr = (UINT32)(UINTN) AsmAppleMapPlatformPrepareKernelState;
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KernelJump->CallInst = 0xD1FF;
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}
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