82 lines
2.5 KiB
ArmAsm
82 lines
2.5 KiB
ArmAsm
/* crt0-efi-x86_64.S - x86_64 EFI startup code.
|
|
Copyright (C) 1999 Hewlett-Packard Co.
|
|
Contributed by David Mosberger <davidm@hpl.hp.com>.
|
|
Copyright (C) 2005 Intel Co.
|
|
Contributed by Fenghua Yu <fenghua.yu@intel.com>.
|
|
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
* Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
* 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.
|
|
* Neither the name of Hewlett-Packard Co. nor the names of its
|
|
contributors may be used to endorse or promote products derived
|
|
from this software without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER OR CONTRIBUTORS
|
|
BE LIABLE FOR ANYDIRECT, 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.
|
|
*/
|
|
.text
|
|
.align 4
|
|
|
|
.globl _start
|
|
.type _start,%function
|
|
_start:
|
|
subq $8, %rsp
|
|
pushq %rcx
|
|
pushq %rdx
|
|
|
|
0:
|
|
lea ImageBase(%rip), %rdi
|
|
lea _DYNAMIC(%rip), %rsi
|
|
|
|
popq %rcx
|
|
popq %rdx
|
|
pushq %rcx
|
|
pushq %rdx
|
|
call _relocate
|
|
|
|
popq %rdi
|
|
popq %rsi
|
|
|
|
call _entry
|
|
addq $8, %rsp
|
|
|
|
.exit:
|
|
ret
|
|
|
|
// hand-craft a dummy .reloc section so EFI knows it's a relocatable executable:
|
|
|
|
.data
|
|
dummy: .4byte 0
|
|
|
|
#define IMAGE_REL_ABSOLUTE 0
|
|
.section .reloc, "a"
|
|
label1:
|
|
.4byte dummy-label1 // Page RVA
|
|
.4byte 12 // Block Size (2*4+2*2), must be aligned by 32 Bits
|
|
.2byte (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy
|
|
.2byte (IMAGE_REL_ABSOLUTE<<12) + 0 // reloc for dummy
|
|
|
|
#if defined(__ELF__) && defined(__linux__)
|
|
.section .note.GNU-stack,"",%progbits
|
|
#endif
|