44 lines
1.3 KiB
C
44 lines
1.3 KiB
C
/**
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Some assembler helper functions plus boot.efi kernel jump callback
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by dmazar
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**/
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#include <Library/BaseLib.h>
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/** Read stack pointer. */
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UINT64 EFIAPI MyAsmReadSp(VOID);
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/** Save 64 bit state that will be restored on callback. */
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VOID EFIAPI MyAsmPrepareJumpFromKernel(VOID);
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/** Start and end address of the 32 and 64 bit code
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that is copied to kernel entry address to jump back
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to our code, to MyAsmJumpFromKernel().
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*/
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extern UINT8 MyAsmEntryPatchCode;
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extern UINT8 MyAsmEntryPatchCodeEnd;
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/** Callback function, 32 and 64 bit, that is called when boot.efi jumps to kernel address. */
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VOID EFIAPI MyAsmJumpFromKernel(VOID);
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/** 32 bit function start and end that copies kernel to proper mem and jumps to kernel. */
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extern UINT8 MyAsmCopyAndJumpToKernel;
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extern UINT8 MyAsmCopyAndJumpToKernel32;
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extern UINT8 MyAsmCopyAndJumpToKernel64;
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extern UINT8 MyAsmCopyAndJumpToKernelEnd;
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extern UINTN SavedCR3;
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extern IA32_DESCRIPTOR SavedGDTR;
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extern IA32_DESCRIPTOR SavedIDTR;
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extern UINT64 AsmKernelEntry;
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extern UINT64 AsmKernelImageStartReloc;
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extern UINT64 AsmKernelImageStart;
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extern UINT64 AsmKernelImageSize;
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extern UINT64 MyAsmCopyAndJumpToKernel32Addr;
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extern UINT64 MyAsmCopyAndJumpToKernel64Addr;
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