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| 2726 | vana | 1 | /* crt0-efi-ia32.S - x86 EFI startup code. |
| 2 | Copyright (C) 1999 Hewlett-Packard Co. |
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| 3 | Contributed by David Mosberger <davidm@hpl.hp.com>. |
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| 4 | |||
| 5 | This file is part of GNU-EFI, the GNU EFI development environment. |
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| 6 | |||
| 7 | GNU EFI is free software; you can redistribute it and/or modify |
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| 8 | it under the terms of the GNU General Public License as published by |
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| 9 | the Free Software Foundation; either version 2, or (at your option) |
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| 10 | any later version. |
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| 11 | |||
| 12 | GNU EFI is distributed in the hope that it will be useful, |
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 15 | GNU General Public License for more details. |
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| 16 | |||
| 17 | You should have received a copy of the GNU General Public License |
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| 18 | along with GNU EFI; see the file COPYING. If not, write to the Free |
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| 19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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| 20 | 02111-1307, USA. */ |
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| 21 | |||
| 22 | .text |
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| 23 | .align 4 |
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| 24 | |||
| 25 | .globl _start |
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| 26 | _start: |
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| 27 | pushl %ebp |
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| 28 | movl %esp,%ebp |
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| 29 | |||
| 30 | pushl 12(%ebp) # copy "image" argument |
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| 31 | pushl 8(%ebp) # copy "systab" argument |
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| 32 | |||
| 33 | call 0f |
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| 34 | 0: popl %eax |
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| 35 | movl %eax,%ebx |
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| 36 | |||
| 37 | addl $ImageBase-0b,%eax # %eax = ldbase |
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| 38 | addl $_DYNAMIC-0b,%ebx # %ebx = _DYNAMIC |
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| 39 | |||
| 40 | pushl %ebx # pass _DYNAMIC as second argument |
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| 41 | pushl %eax # pass ldbase as first argument |
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| 42 | call _relocate |
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| 43 | popl %ebx |
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| 44 | popl %ebx |
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| 45 | testl %eax,%eax |
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| 46 | jne .exit |
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| 47 | |||
| 48 | call efi_main # call app with "image" and "systab" argument |
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| 49 | |||
| 50 | .exit: leave |
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| 51 | ret |
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| 52 | |||
| 53 | // hand-craft a dummy .reloc section so EFI knows it's a relocatable executable: |
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| 54 | |||
| 55 | .data |
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| 56 | dummy: .long 0 |
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| 57 | |||
| 58 | #define IMAGE_REL_ABSOLUTE 0 |
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| 59 | .section .reloc, "a" |
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| 60 | .long dummy // Page RVA |
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| 61 | .long 10 // Block Size (2*4+2) |
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| 62 | .word (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy |