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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
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