2006-06-27 21:55:49 -04:00
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/*
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* This file contains miscellaneous low-level functions.
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* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
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*
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* Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
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* and Paul Mackerras.
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*
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* Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com)
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* PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <asm/ppc_asm.h>
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2007-11-27 19:13:02 -05:00
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#include <asm/unistd.h>
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2006-06-27 21:55:49 -04:00
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.text
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/*
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* Returns (address we are running at) - (address we were linked at)
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* for use before the text and data are mapped to KERNELBASE.
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*/
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_GLOBAL(reloc_offset)
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mflr r0
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bl 1f
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1: mflr r3
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LOAD_REG_IMMEDIATE(r4,1b)
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subf r3,r4,r3
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mtlr r0
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blr
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/*
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* add_reloc_offset(x) returns x + reloc_offset().
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*/
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_GLOBAL(add_reloc_offset)
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mflr r0
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bl 1f
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1: mflr r5
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LOAD_REG_IMMEDIATE(r4,1b)
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subf r5,r4,r5
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add r3,r3,r5
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mtlr r0
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blr
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2007-11-27 19:13:02 -05:00
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_GLOBAL(kernel_execve)
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li r0,__NR_execve
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sc
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bnslr
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neg r3,r3
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blr
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