diff options
Diffstat (limited to 'stand/efi/loader/arch/i386/start.S')
| -rw-r--r-- | stand/efi/loader/arch/i386/start.S | 93 |
1 files changed, 50 insertions, 43 deletions
diff --git a/stand/efi/loader/arch/i386/start.S b/stand/efi/loader/arch/i386/start.S index b597f419d4a1..2754c81e509c 100644 --- a/stand/efi/loader/arch/i386/start.S +++ b/stand/efi/loader/arch/i386/start.S @@ -1,5 +1,6 @@ /*- - * Copyright (c) 2008-2010 Rui Paulo <rpaulo@FreeBSD.org> + * Copyright (C) 1999 Hewlett-Packard Co. + * Contributed by David Mosberger <davidm@hpl.hp.com>. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -10,59 +11,65 @@ * 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 AUTHOR 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 AUTHOR 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 + * 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. - * - * $FreeBSD$ + */ + +/* + * crt0-efi-ia32.S - x86 EFI startup code. */ .text + .align 4 -#include <machine/asm.h> + .globl _start +_start: + pushl %ebp + movl %esp, %ebp -#define EFI_SUCCESS 0 + pushl 12(%ebp) + pushl 8(%ebp) -/* - * EFI entry point. - * _start(EFI_IMAGE image_handle, EFI_SYSTEM_TABLE *system_table); - * - * We calculate the base address along with _DYNAMIC, relocate us and finally - * pass control to efi_main. - */ + call 0f +0: popl %eax + movl %eax, %ebx + + addl $ImageBase-0b, %eax + addl $_DYNAMIC-0b, %ebx -ENTRY(_start) - pushl %ebp - movl %esp, %ebp + pushl %ebx + pushl %eax + call self_reloc + popl %ebx + popl %ebx - pushl 12(%ebp) /* image_handle */ - pushl 8(%ebp) /* system_table */ - call 0f -0: popl %eax - movl %eax, %ebx - addl $ImageBase-0b, %eax - addl $_DYNAMIC-0b, %ebx - pushl %ebx /* dynamic */ - pushl %eax /* ImageBase */ - call self_reloc - popl %ebx /* remove ImageBase from the stack */ - popl %ebx /* remove dynamic from the stack */ - call efi_main -1: leave + call setup + +.exit: + leave ret -END(_start) + + /* + * hand-craft a dummy .reloc section so EFI knows it's a relocatable + * executable: + */ .data .section .reloc, "a" - .long 0 - .long 10 - .word 0 + .long 0 + .long 10 + .word 0 |