1 /* crt0-efi-ia32.S - x86 EFI startup code.
2 Copyright (C) 1999 Hewlett-Packard Co.
3 Contributed by David Mosberger <davidm@hpl.hp.com>.
7 Redistribution and use in source and binary forms, with or without
8 modification, are permitted provided that the following conditions
11 * Redistributions of source code must retain the above copyright
12 notice, this list of conditions and the following disclaimer.
13 * Redistributions in binary form must reproduce the above
14 copyright notice, this list of conditions and the following
15 disclaimer in the documentation and/or other materials
16 provided with the distribution.
17 * Neither the name of Hewlett-Packard Co. nor the names of its
18 contributors may be used to endorse or promote products derived
19 from this software without specific prior written permission.
21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
22 CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
23 INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
24 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
25 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
26 BE LIABLE FOR ANYDIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
27 OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
28 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
29 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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32 THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
44 pushl 12(%ebp) # copy "image" argument
45 pushl 8(%ebp) # copy "systab" argument
51 addl $ImageBase-0b,%eax # %eax = ldbase
52 addl $_DYNAMIC-0b,%ebx # %ebx = _DYNAMIC
54 pushl %ebx # pass _DYNAMIC as second argument
55 pushl %eax # pass ldbase as first argument
62 call efi_main # call app with "image" and "systab" argument
67 // hand-craft a dummy .reloc section so EFI knows it's a relocatable executable:
72 #define IMAGE_REL_ABSOLUTE 0
74 .long dummy // Page RVA
75 .long 10 // Block Size (2*4+2)
76 .word (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy