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/* crt0-efi-ia64.S - IA-64 EFI startup code.
Copyright (C) 1999 Hewlett-Packard Co.
Contributed by David Mosberger <davidm@hpl.hp.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
.psr abi64
.psr lsb
.lsb
.proc _start
_start:
alloc loc0=ar.pfs,2,2,2,0
mov loc1=rp
movl out0=@gprel(ImageBase) // out0 <- ImageBase (ldbase)
;;
add out0=out0,gp
movl out1=@gprel(_DYNAMIC) // out1 <- _DYNAMIC
;; // avoid WAW on CFM
add out1=out1,gp
br.call.sptk.few rp=_relocate
.Lret0:
cmp.ne p6,p0=r0,r8 // r8 == EFI_SUCCESS?
(p6) br.cond.sptk.few .exit // no ->
.Lret1:
mov out0=in0 // image handle
mov out1=in1 // systab
br.call.sptk.few rp=efi_main
.Lret2:
.exit:
mov ar.pfs=loc0
mov rp=loc1
;;
br.ret.sptk.few rp
.endp _start
// PE32+ wants a PLABEL, not the code address of the entry point:
.align 16
.global _start_plabel
.section .plabel, "a"
_start_plabel:
data8 _start
data8 __gp
// hand-craft a .reloc section for the plabel:
#define IMAGE_REL_BASED_DIR64 10
.section .reloc, "a"
data4 _start_plabel // Page RVA
data4 12 // Block Size (2*4+2*2)
data2 (IMAGE_REL_BASED_DIR64<<12) + 0 // reloc for plabel's entry point
data2 (IMAGE_REL_BASED_DIR64<<12) + 8 // reloc for plabel's global pointer
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