1/* crt0-efi-ia64.S - IA-64 EFI startup code. 2 Copyright (C) 1999 Hewlett-Packard Co. 3 Contributed by David Mosberger <davidm@hpl.hp.com>. 4 5 All rights reserved. 6 7 Redistribution and use in source and binary forms, with or without 8 modification, are permitted provided that the following conditions 9 are met: 10 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. 20 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 31 TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 32 THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 SUCH DAMAGE. 34*/ 35 .text 36 .psr abi64 37 .psr lsb 38 .lsb 39 40 .proc _start 41_start: 42 alloc loc0=ar.pfs,2,2,2,0 43 mov loc1=rp 44 movl out0=@gprel(ImageBase) // out0 <- ImageBase (ldbase) 45 ;; 46 add out0=out0,gp 47 movl out1=@gprel(_DYNAMIC) // out1 <- _DYNAMIC 48 ;; // avoid WAW on CFM 49 add out1=out1,gp 50 br.call.sptk.few rp=_relocate 51.Lret0: 52 cmp.ne p6,p0=r0,r8 // r8 == EFI_SUCCESS? 53(p6) br.cond.sptk.few .exit // no -> 54 55.Lret1: 56 57 mov out0=in0 // image handle 58 mov out1=in1 // systab 59 br.call.sptk.few rp=efi_main 60.Lret2: 61.exit: 62 mov ar.pfs=loc0 63 mov rp=loc1 64 ;; 65 br.ret.sptk.few rp 66 67 .endp _start 68 69 70 // PE32+ wants a PLABEL, not the code address of the entry point: 71 72 .align 16 73 .global _start_plabel 74 .section .plabel, "a" 75_start_plabel: 76 data8 _start 77 data8 __gp 78 79 // hand-craft a .reloc section for the plabel: 80 81#define IMAGE_REL_BASED_DIR64 10 82 83 .section .reloc, "a" 84 data4 _start_plabel // Page RVA 85 data4 12 // Block Size (2*4+2*2) 86 data2 (IMAGE_REL_BASED_DIR64<<12) + 0 // reloc for plabel's entry point 87 data2 (IMAGE_REL_BASED_DIR64<<12) + 8 // reloc for plabel's global pointer 88