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1 | /* crt0-efi-ia64.S - IA-64 EFI startup code. |
1 | /* crt0-efi-ia64.S - IA-64 EFI startup code. |
2 | Copyright (C) 1999 Hewlett-Packard Co. |
2 | Copyright (C) 1999 Hewlett-Packard Co. |
3 | Contributed by David Mosberger <davidm@hpl.hp.com>. |
3 | Contributed by David Mosberger <davidm@hpl.hp.com>. |
4 | 4 | ||
5 | This file is part of GNU-EFI, the GNU EFI development environment. |
5 | This file is part of GNU-EFI, the GNU EFI development environment. |
6 | 6 | ||
7 | GNU EFI is free software; you can redistribute it and/or modify |
7 | GNU EFI is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by |
8 | it under the terms of the GNU General Public License as published by |
9 | the Free Software Foundation; either version 2, or (at your option) |
9 | the Free Software Foundation; either version 2, or (at your option) |
10 | any later version. |
10 | any later version. |
11 | 11 | ||
12 | GNU EFI is distributed in the hope that it will be useful, |
12 | GNU EFI is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15 | GNU General Public License for more details. |
15 | GNU General Public License for more details. |
16 | 16 | ||
17 | You should have received a copy of the GNU General Public License |
17 | You should have received a copy of the GNU General Public License |
18 | along with GNU EFI; see the file COPYING. If not, write to the Free |
18 | along with GNU EFI; see the file COPYING. If not, write to the Free |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
19 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
20 | 02111-1307, USA. */ |
20 | 02111-1307, USA. */ |
21 | 21 | ||
22 | .text |
22 | .text |
23 | .psr abi64 |
23 | .psr abi64 |
24 | .psr lsb |
24 | .psr lsb |
25 | .lsb |
25 | .lsb |
26 | 26 | ||
27 | .proc _start |
27 | .proc _start |
28 | _start: |
28 | _start: |
29 | alloc loc0=ar.pfs,2,2,2,0 |
29 | alloc loc0=ar.pfs,2,2,2,0 |
30 | mov loc1=rp |
30 | mov loc1=rp |
31 | movl out0=@gprel(ImageBase) // out0 <- ImageBase (ldbase) |
31 | movl out0=@gprel(ImageBase) // out0 <- ImageBase (ldbase) |
32 | ;; |
32 | ;; |
33 | add out0=out0,gp |
33 | add out0=out0,gp |
34 | movl out1=@gprel(_DYNAMIC) // out1 <- _DYNAMIC |
34 | movl out1=@gprel(_DYNAMIC) // out1 <- _DYNAMIC |
35 | ;; // avoid WAW on CFM |
35 | ;; // avoid WAW on CFM |
36 | add out1=out1,gp |
36 | add out1=out1,gp |
37 | br.call.sptk.few rp=_relocate |
37 | br.call.sptk.few rp=_relocate |
38 | .Lret0: |
38 | .Lret0: |
39 | cmp.ne p6,p0=r0,r8 // r8 == EFI_SUCCESS? |
39 | cmp.ne p6,p0=r0,r8 // r8 == EFI_SUCCESS? |
40 | (p6) br.cond.sptk.few .exit // no -> |
40 | (p6) br.cond.sptk.few .exit // no -> |
41 | 41 | ||
42 | .Lret1: |
42 | .Lret1: |
43 | 43 | ||
44 | mov out0=in0 // image handle |
44 | mov out0=in0 // image handle |
45 | mov out1=in1 // systab |
45 | mov out1=in1 // systab |
46 | br.call.sptk.few rp=efi_main |
46 | br.call.sptk.few rp=efi_main |
47 | .Lret2: |
47 | .Lret2: |
48 | .exit: |
48 | .exit: |
49 | mov ar.pfs=loc0 |
49 | mov ar.pfs=loc0 |
50 | mov rp=loc1 |
50 | mov rp=loc1 |
51 | ;; |
51 | ;; |
52 | br.ret.sptk.few rp |
52 | br.ret.sptk.few rp |
53 | 53 | ||
54 | .endp _start |
54 | .endp _start |
55 | 55 | ||
56 | 56 | ||
57 | // PE32+ wants a PLABEL, not the code address of the entry point: |
57 | // PE32+ wants a PLABEL, not the code address of the entry point: |
58 | 58 | ||
59 | .align 16 |
59 | .align 16 |
60 | .global _start_plabel |
60 | .global _start_plabel |
61 | .section .plabel, "a" |
61 | .section .plabel, "a" |
62 | _start_plabel: |
62 | _start_plabel: |
63 | data8 _start |
63 | data8 _start |
64 | data8 __gp |
64 | data8 __gp |
65 | 65 | ||
66 | // hand-craft a .reloc section for the plabel: |
66 | // hand-craft a .reloc section for the plabel: |
67 | 67 | ||
68 | #define IMAGE_REL_BASED_DIR64 10 |
68 | #define IMAGE_REL_BASED_DIR64 10 |
69 | 69 | ||
70 | .section .reloc, "a" |
70 | .section .reloc, "a" |
71 | data4 _start_plabel // Page RVA |
71 | data4 _start_plabel // Page RVA |
72 | data4 12 // Block Size (2*4+2*2) |
72 | data4 12 // Block Size (2*4+2*2) |
73 | data2 (IMAGE_REL_BASED_DIR64<<12) + 0 // reloc for plabel's entry point |
73 | data2 (IMAGE_REL_BASED_DIR64<<12) + 0 // reloc for plabel's entry point |
74 | data2 (IMAGE_REL_BASED_DIR64<<12) + 8 // reloc for plabel's global pointer |
74 | data2 (IMAGE_REL_BASED_DIR64<<12) + 8 // reloc for plabel's global pointer |
75 | 75 |