start.S

/*-
 * Copyright (C) 1999 Hewlett-Packard Co.
 *     Contributed by David Mosberger <[email protected]>.
 * Copyright (C) 2005 Intel Co.
 *     Contributed by Fenghua Yu <[email protected]>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of Hewlett-Packard Co. nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
 * TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*
 * crt0-efi-x86_64.S - x86_64 EFI startup code.
 */

	.text
	.align 4

	.globl _start
_start:
	subq $8, %rsp
	pushq %rcx
	pushq %rdx

0:
	lea ImageBase(%rip), %rdi
	lea _DYNAMIC(%rip), %rsi

	popq %rcx
	popq %rdx
	pushq %rcx
	pushq %rdx
	call self_reloc

	popq %rdi
	popq %rsi

	call efi_main
	addq $8, %rsp

.exit:
	ret

	/*
	 * hand-craft a dummy .reloc section so EFI knows it's a relocatable
	 * executable:
	 */

	.data
	.section .reloc, "a"
	.long   0
	.long   10
	.word   0