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