1*4882a593Smuzhiyun/* 2*4882a593Smuzhiyun * crt0-efi-x86_64.S - x86_64 EFI startup code. 3*4882a593Smuzhiyun * Copyright (C) 1999 Hewlett-Packard Co. 4*4882a593Smuzhiyun * Contributed by David Mosberger <davidm@hpl.hp.com>. 5*4882a593Smuzhiyun * Copyright (C) 2005 Intel Co. 6*4882a593Smuzhiyun * Contributed by Fenghua Yu <fenghua.yu@intel.com>. 7*4882a593Smuzhiyun * 8*4882a593Smuzhiyun * All rights reserved. 9*4882a593Smuzhiyun * SPDX-License-Identifier: BSD-3-Clause 10*4882a593Smuzhiyun */ 11*4882a593Smuzhiyun .text 12*4882a593Smuzhiyun .align 4 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun .globl _start 15*4882a593Smuzhiyun_start: 16*4882a593Smuzhiyun subq $8, %rsp 17*4882a593Smuzhiyun pushq %rcx 18*4882a593Smuzhiyun pushq %rdx 19*4882a593Smuzhiyun 20*4882a593Smuzhiyun0: 21*4882a593Smuzhiyun lea image_base(%rip), %rdi 22*4882a593Smuzhiyun lea _DYNAMIC(%rip), %rsi 23*4882a593Smuzhiyun 24*4882a593Smuzhiyun popq %rcx 25*4882a593Smuzhiyun popq %rdx 26*4882a593Smuzhiyun pushq %rcx 27*4882a593Smuzhiyun pushq %rdx 28*4882a593Smuzhiyun call _relocate 29*4882a593Smuzhiyun 30*4882a593Smuzhiyun popq %rdi 31*4882a593Smuzhiyun popq %rsi 32*4882a593Smuzhiyun 33*4882a593Smuzhiyun call efi_main 34*4882a593Smuzhiyun addq $8, %rsp 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun.exit: 37*4882a593Smuzhiyun ret 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun /* 40*4882a593Smuzhiyun * hand-craft a dummy .reloc section so EFI knows it's a relocatable 41*4882a593Smuzhiyun * executable: 42*4882a593Smuzhiyun */ 43*4882a593Smuzhiyun .data 44*4882a593Smuzhiyundummy: .long 0 45*4882a593Smuzhiyun 46*4882a593Smuzhiyun#define IMAGE_REL_ABSOLUTE 0 47*4882a593Smuzhiyun .section .reloc, "a" 48*4882a593Smuzhiyunlabel1: 49*4882a593Smuzhiyun .long dummy-label1 /* Page RVA */ 50*4882a593Smuzhiyun .long 10 /* Block Size (2*4+2) */ 51*4882a593Smuzhiyun .word (IMAGE_REL_ABSOLUTE << 12) + 0 /* reloc for dummy */ 52