/* $NetBSD: crt0-efi-ia32.S,v 1.1.1.1 2014/04/01 16:16:08 jakllsch Exp $ */ /* crt0-efi-ia32.S - x86 EFI startup code. Copyright (C) 1999 Hewlett-Packard Co. Contributed by David Mosberger . All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * 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. * 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 ANYDIRECT, 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. */ .text .align 4 .globl _start _start: pushl %ebp movl %esp,%ebp pushl 12(%ebp) # copy "image" argument pushl 8(%ebp) # copy "systab" argument call 0f 0: popl %eax movl %eax,%ebx addl $ImageBase-0b,%eax # %eax = ldbase addl $_DYNAMIC-0b,%ebx # %ebx = _DYNAMIC pushl %ebx # pass _DYNAMIC as second argument pushl %eax # pass ldbase as first argument call _relocate popl %ebx popl %ebx testl %eax,%eax jne .exit call efi_main # call app with "image" and "systab" argument .exit: leave ret // hand-craft a dummy .reloc section so EFI knows it's a relocatable executable: .data dummy: .long 0 #define IMAGE_REL_ABSOLUTE 0 .section .reloc .long dummy // Page RVA .long 10 // Block Size (2*4+2) .word (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy