Curle
d588e232c4
This branch has been dedicated to purely the UEFI bootloader. As such, all other code has been removed. This code can be compiled with Visual Studio, gcc or llvm.
88 lines
2.7 KiB
ArmAsm
88 lines
2.7 KiB
ArmAsm
/* 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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