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127efeb2 SR |
1 | /* |
2 | * This file contains miscellaneous low-level functions. | |
3 | * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org) | |
4 | * | |
5 | * Largely rewritten by Cort Dougan (cort@cs.nmt.edu) | |
6 | * and Paul Mackerras. | |
7 | * | |
8 | * Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com) | |
9 | * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com) | |
10 | * | |
11 | * This program is free software; you can redistribute it and/or | |
12 | * modify it under the terms of the GNU General Public License | |
13 | * as published by the Free Software Foundation; either version | |
14 | * 2 of the License, or (at your option) any later version. | |
15 | */ | |
16 | #include <asm/ppc_asm.h> | |
17 | ||
18 | .text | |
19 | ||
127efeb2 SR |
20 | /* |
21 | * Returns (address we are running at) - (address we were linked at) | |
22 | * for use before the text and data are mapped to KERNELBASE. | |
23 | */ | |
24 | ||
25 | _GLOBAL(reloc_offset) | |
26 | mflr r0 | |
27 | bl 1f | |
28 | 1: mflr r3 | |
29 | LOAD_REG_IMMEDIATE(r4,1b) | |
30 | subf r3,r4,r3 | |
31 | mtlr r0 | |
32 | blr | |
33 | ||
34 | /* | |
35 | * add_reloc_offset(x) returns x + reloc_offset(). | |
36 | */ | |
37 | _GLOBAL(add_reloc_offset) | |
38 | mflr r0 | |
39 | bl 1f | |
40 | 1: mflr r5 | |
41 | LOAD_REG_IMMEDIATE(r4,1b) | |
42 | subf r5,r4,r5 | |
43 | add r3,r3,r5 | |
44 | mtlr r0 | |
45 | blr |