mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-16 17:58:23 +00:00
53 lines
1 KiB
ArmAsm
53 lines
1 KiB
ArmAsm
|
/*
|
||
|
|
* crt0-efi-ia32.S - x86 EFI startup code.
|
||
|
|
*
|
||
|
|
* Copyright (C) 1999 Hewlett-Packard Co.
|
||
|
|
* Contributed by David Mosberger <davidm@hpl.hp.com>.
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
||
|
|
*/
|
||
|
|
|
||
|
|
.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 $image_base-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 */
|