88 lines
2.7 KiB
ArmAsm
88 lines
2.7 KiB
ArmAsm
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/* crt0-efi-ia64.S - IA-64 EFI startup code.
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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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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials
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provided with the distribution.
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* Neither the name of Hewlett-Packard Co. nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
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BE LIABLE FOR ANYDIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY,
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OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
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TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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SUCH DAMAGE.
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*/
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.text
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.psr abi64
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.psr lsb
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.lsb
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.proc _start
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_start:
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alloc loc0=ar.pfs,2,2,2,0
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mov loc1=rp
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movl out0=@gprel(ImageBase) // out0 <- ImageBase (ldbase)
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;;
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add out0=out0,gp
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movl out1=@gprel(_DYNAMIC) // out1 <- _DYNAMIC
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;; // avoid WAW on CFM
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add out1=out1,gp
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br.call.sptk.few rp=_relocate
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.Lret0:
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cmp.ne p6,p0=r0,r8 // r8 == EFI_SUCCESS?
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(p6) br.cond.sptk.few .exit // no ->
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.Lret1:
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mov out0=in0 // image handle
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mov out1=in1 // systab
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br.call.sptk.few rp=efi_main
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.Lret2:
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.exit:
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mov ar.pfs=loc0
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mov rp=loc1
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;;
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br.ret.sptk.few rp
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.endp _start
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// PE32+ wants a PLABEL, not the code address of the entry point:
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.align 16
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.global _start_plabel
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.section .plabel, "a"
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_start_plabel:
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data8 _start
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data8 __gp
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// hand-craft a .reloc section for the plabel:
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#define IMAGE_REL_BASED_DIR64 10
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.section .reloc, "a"
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data4 _start_plabel // Page RVA
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data4 12 // Block Size (2*4+2*2)
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data2 (IMAGE_REL_BASED_DIR64<<12) + 0 // reloc for plabel's entry point
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data2 (IMAGE_REL_BASED_DIR64<<12) + 8 // reloc for plabel's global pointer
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