2018-05-07 05:58:06 +08:00
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/* SPDX-License-Identifier: BSD-3-Clause */
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2015-08-05 02:33:46 +08:00
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/*
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* crt0-efi-ia32.S - x86 EFI startup code.
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*
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* Copyright (C) 1999 Hewlett-Packard Co.
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* Contributed by David Mosberger <davidm@hpl.hp.com>.
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* All rights reserved.
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*/
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.text
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.align 4
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.globl _start
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_start:
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pushl %ebp
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movl %esp,%ebp
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pushl 12(%ebp) # copy "image" argument
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pushl 8(%ebp) # copy "systab" argument
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call 0f
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0: popl %eax
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movl %eax,%ebx
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addl $image_base-0b,%eax # %eax = ldbase
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addl $_DYNAMIC-0b,%ebx # %ebx = _DYNAMIC
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pushl %ebx # pass _DYNAMIC as second argument
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pushl %eax # pass ldbase as first argument
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call _relocate
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popl %ebx
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popl %ebx
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testl %eax,%eax
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jne .exit
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call efi_main # call app with "image" and "systab" argument
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.exit: leave
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ret
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/*
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* hand-craft a dummy .reloc section so EFI knows it's a relocatable
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* executable:
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*/
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.data
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dummy: .long 0
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#define IMAGE_REL_ABSOLUTE 0
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.section .reloc
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.long dummy /* Page RVA */
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.long 10 /* Block Size (2*4+2) */
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.word (IMAGE_REL_ABSOLUTE << 12) + 0 /* reloc for dummy */
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