diff options
Diffstat (limited to 'stand/efi/loader/arch/i386/start.S')
| -rw-r--r-- | stand/efi/loader/arch/i386/start.S | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/stand/efi/loader/arch/i386/start.S b/stand/efi/loader/arch/i386/start.S new file mode 100644 index 000000000000..b597f419d4a1 --- /dev/null +++ b/stand/efi/loader/arch/i386/start.S @@ -0,0 +1,68 @@ +/*- + * Copyright (c) 2008-2010 Rui Paulo <rpaulo@FreeBSD.org> + * 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. + * + * 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 + * SUCH DAMAGE. + * + * $FreeBSD$ + */ + + .text + +#include <machine/asm.h> + +#define EFI_SUCCESS 0 + +/* + * 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. + */ + +ENTRY(_start) + pushl %ebp + movl %esp, %ebp + + 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 + ret +END(_start) + + .data + .section .reloc, "a" + .long 0 + .long 10 + .word 0 |