diff options
Diffstat (limited to 'arch/x86/platform/efi/efi_stub_64.S')
| -rw-r--r-- | arch/x86/platform/efi/efi_stub_64.S | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/arch/x86/platform/efi/efi_stub_64.S b/arch/x86/platform/efi/efi_stub_64.S new file mode 100644 index 000000000..2206b8bc4 --- /dev/null +++ b/arch/x86/platform/efi/efi_stub_64.S @@ -0,0 +1,27 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Function calling ABI conversion from Linux to EFI for x86_64 + * + * Copyright (C) 2007 Intel Corp + * Bibo Mao <bibo.mao@intel.com> + * Huang Ying <ying.huang@intel.com> + */ + +#include <linux/linkage.h> +#include <asm/nospec-branch.h> + +SYM_FUNC_START(__efi_call) + pushq %rbp + movq %rsp, %rbp + and $~0xf, %rsp + mov 16(%rbp), %rax + subq $48, %rsp + mov %r9, 32(%rsp) + mov %rax, 40(%rsp) + mov %r8, %r9 + mov %rcx, %r8 + mov %rsi, %rcx + CALL_NOSPEC rdi + leave + RET +SYM_FUNC_END(__efi_call) |