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awilliam
GitHub Repository: awilliam/linux-vfio
 Path: blob/master/arch/x86/platform/efi/efi_stub_64.S
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/*

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 * Function calling ABI conversion from Linux to EFI for x86_64

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 *

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 * Copyright (C) 2007 Intel Corp

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 *	Bibo Mao <[email protected]>

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 *	Huang Ying <[email protected]>

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 */

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#include <linux/linkage.h>

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#define SAVE_XMM			\

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	mov %rsp, %rax;			\

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	subq $0x70, %rsp;		\

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	and $~0xf, %rsp;		\

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	mov %rax, (%rsp);		\

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	mov %cr0, %rax;			\

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	clts;				\

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	mov %rax, 0x8(%rsp);		\

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	movaps %xmm0, 0x60(%rsp);	\

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	movaps %xmm1, 0x50(%rsp);	\

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	movaps %xmm2, 0x40(%rsp);	\

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	movaps %xmm3, 0x30(%rsp);	\

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	movaps %xmm4, 0x20(%rsp);	\

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	movaps %xmm5, 0x10(%rsp)

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#define RESTORE_XMM			\

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	movaps 0x60(%rsp), %xmm0;	\

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	movaps 0x50(%rsp), %xmm1;	\

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	movaps 0x40(%rsp), %xmm2;	\

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	movaps 0x30(%rsp), %xmm3;	\

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	movaps 0x20(%rsp), %xmm4;	\

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	movaps 0x10(%rsp), %xmm5;	\

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	mov 0x8(%rsp), %rsi;		\

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	mov %rsi, %cr0;			\

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	mov (%rsp), %rsp

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ENTRY(efi_call0)

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	SAVE_XMM

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	subq $32, %rsp

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	call *%rdi

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	addq $32, %rsp

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	RESTORE_XMM

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	ret

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ENDPROC(efi_call0)

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ENTRY(efi_call1)

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	SAVE_XMM

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	subq $32, %rsp

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	mov  %rsi, %rcx

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	call *%rdi

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	addq $32, %rsp

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	RESTORE_XMM

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	ret

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ENDPROC(efi_call1)

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ENTRY(efi_call2)

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	SAVE_XMM

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	subq $32, %rsp

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	mov  %rsi, %rcx

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	call *%rdi

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	addq $32, %rsp

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	RESTORE_XMM

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	ret

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ENDPROC(efi_call2)

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ENTRY(efi_call3)

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	SAVE_XMM

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	subq $32, %rsp

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	mov  %rcx, %r8

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	mov  %rsi, %rcx

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	call *%rdi

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	addq $32, %rsp

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	RESTORE_XMM

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	ret

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ENDPROC(efi_call3)

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ENTRY(efi_call4)

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	SAVE_XMM

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	subq $32, %rsp

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	mov %r8, %r9

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	mov %rcx, %r8

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	mov %rsi, %rcx

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	call *%rdi

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	addq $32, %rsp

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	RESTORE_XMM

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	ret

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ENDPROC(efi_call4)

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ENTRY(efi_call5)

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	SAVE_XMM

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	subq $48, %rsp

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	mov %r9, 32(%rsp)

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	mov %r8, %r9

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	mov %rcx, %r8

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	mov %rsi, %rcx

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	call *%rdi

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	addq $48, %rsp

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	RESTORE_XMM

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	ret

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ENDPROC(efi_call5)

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ENTRY(efi_call6)

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	SAVE_XMM

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	mov (%rsp), %rax

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	mov 8(%rax), %rax

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	subq $48, %rsp

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	mov %r9, 32(%rsp)

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	mov %rax, 40(%rsp)

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	mov %r8, %r9

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	mov %rcx, %r8

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	mov %rsi, %rcx

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	call *%rdi

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	addq $48, %rsp

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	RESTORE_XMM

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	ret

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ENDPROC(efi_call6)

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