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| 2726 | vana | 1 | /* crt0-efi-ia64.S - IA-64 EFI startup code. |
| 2 | Copyright (C) 1999 Hewlett-Packard Co. |
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| 3 | Contributed by David Mosberger <davidm@hpl.hp.com>. |
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| 4 | |||
| 5 | This file is part of GNU-EFI, the GNU EFI development environment. |
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| 6 | |||
| 7 | GNU EFI is free software; you can redistribute it and/or modify |
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| 8 | it under the terms of the GNU General Public License as published by |
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| 9 | the Free Software Foundation; either version 2, or (at your option) |
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| 10 | any later version. |
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| 11 | |||
| 12 | GNU EFI is distributed in the hope that it will be useful, |
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| 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 15 | GNU General Public License for more details. |
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| 16 | |||
| 17 | You should have received a copy of the GNU General Public License |
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| 18 | along with GNU EFI; see the file COPYING. If not, write to the Free |
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| 19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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| 20 | 02111-1307, USA. */ |
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| 21 | |||
| 22 | .text |
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| 23 | .psr abi64 |
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| 24 | .psr lsb |
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| 25 | .lsb |
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| 26 | |||
| 27 | .proc _start |
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| 28 | _start: |
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| 29 | alloc loc0=ar.pfs,2,2,2,0 |
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| 30 | mov loc1=rp |
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| 31 | movl out0=@gprel(ImageBase) // out0 <- ImageBase (ldbase) |
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| 32 | ;; |
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| 33 | add out0=out0,gp |
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| 34 | movl out1=@gprel(_DYNAMIC) // out1 <- _DYNAMIC |
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| 35 | ;; // avoid WAW on CFM |
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| 36 | add out1=out1,gp |
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| 37 | br.call.sptk.few rp=_relocate |
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| 38 | .Lret0: |
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| 39 | cmp.ne p6,p0=r0,r8 // r8 == EFI_SUCCESS? |
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| 40 | (p6) br.cond.sptk.few .exit // no -> |
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| 41 | |||
| 42 | .Lret1: |
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| 43 | |||
| 44 | mov out0=in0 // image handle |
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| 45 | mov out1=in1 // systab |
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| 46 | br.call.sptk.few rp=efi_main |
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| 47 | .Lret2: |
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| 48 | .exit: |
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| 49 | mov ar.pfs=loc0 |
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| 50 | mov rp=loc1 |
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| 51 | ;; |
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| 52 | br.ret.sptk.few rp |
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| 53 | |||
| 54 | .endp _start |
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| 55 | |||
| 56 | |||
| 57 | // PE32+ wants a PLABEL, not the code address of the entry point: |
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| 58 | |||
| 59 | .align 16 |
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| 60 | .global _start_plabel |
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| 61 | .section .plabel, "a" |
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| 62 | _start_plabel: |
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| 63 | data8 _start |
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| 64 | data8 __gp |
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| 65 | |||
| 66 | // hand-craft a .reloc section for the plabel: |
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| 67 | |||
| 68 | #define IMAGE_REL_BASED_DIR64 10 |
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| 69 | |||
| 70 | .section .reloc, "a" |
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| 71 | data4 _start_plabel // Page RVA |
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| 72 | data4 12 // Block Size (2*4+2*2) |
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| 73 | data2 (IMAGE_REL_BASED_DIR64<<12) + 0 // reloc for plabel's entry point |
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| 74 | data2 (IMAGE_REL_BASED_DIR64<<12) + 8 // reloc for plabel's global pointer |