/* * 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. * * PPC64 updates by Dave Engebretsen (engebret@us.ibm.com) * * setjmp/longjmp code by Paul Mackerras. * * 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>#include <asm/asm-compat.h>#include <asm/asm-offsets.h>#include <asm/export.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	1f1:	mflr	r3	PPC_LL	r4,(2f-1b)(r3)	subf	r3,r4,r3	mtlr	r0	blr 	.align	32:	PPC_LONG 1b /* * add_reloc_offset(x) returns x + reloc_offset(). */_GLOBAL(add_reloc_offset)	mflr	r0	bl	1f1:	mflr	r5	PPC_LL	r4,(2f-1b)(r5)	subf	r5,r4,r5	add	r3,r3,r5	mtlr	r0	blr 	.align	32:	PPC_LONG 1b _GLOBAL(setjmp)	mflr	r0	PPC_STL	r0,0(r3)	PPC_STL	r1,SZL(r3)	PPC_STL	r2,2*SZL(r3)	mfcr	r0	PPC_STL	r0,3*SZL(r3)	PPC_STL	r13,4*SZL(r3)	PPC_STL	r14,5*SZL(r3)	PPC_STL	r15,6*SZL(r3)	PPC_STL	r16,7*SZL(r3)	PPC_STL	r17,8*SZL(r3)	PPC_STL	r18,9*SZL(r3)	PPC_STL	r19,10*SZL(r3)	PPC_STL	r20,11*SZL(r3)	PPC_STL	r21,12*SZL(r3)	PPC_STL	r22,13*SZL(r3)	PPC_STL	r23,14*SZL(r3)	PPC_STL	r24,15*SZL(r3)	PPC_STL	r25,16*SZL(r3)	PPC_STL	r26,17*SZL(r3)	PPC_STL	r27,18*SZL(r3)	PPC_STL	r28,19*SZL(r3)	PPC_STL	r29,20*SZL(r3)	PPC_STL	r30,21*SZL(r3)	PPC_STL	r31,22*SZL(r3)	li	r3,0	blr _GLOBAL(longjmp)	PPC_LCMPI r4,0	bne	1f	li	r4,11:	PPC_LL	r13,4*SZL(r3)	PPC_LL	r14,5*SZL(r3)	PPC_LL	r15,6*SZL(r3)	PPC_LL	r16,7*SZL(r3)	PPC_LL	r17,8*SZL(r3)	PPC_LL	r18,9*SZL(r3)	PPC_LL	r19,10*SZL(r3)	PPC_LL	r20,11*SZL(r3)	PPC_LL	r21,12*SZL(r3)	PPC_LL	r22,13*SZL(r3)	PPC_LL	r23,14*SZL(r3)	PPC_LL	r24,15*SZL(r3)	PPC_LL	r25,16*SZL(r3)	PPC_LL	r26,17*SZL(r3)	PPC_LL	r27,18*SZL(r3)	PPC_LL	r28,19*SZL(r3)	PPC_LL	r29,20*SZL(r3)	PPC_LL	r30,21*SZL(r3)	PPC_LL	r31,22*SZL(r3)	PPC_LL	r0,3*SZL(r3)	mtcrf	0x38,r0	PPC_LL	r0,0(r3)	PPC_LL	r1,SZL(r3)	PPC_LL	r2,2*SZL(r3)	mtlr	r0	mr	r3,r4	blr _GLOBAL(current_stack_pointer)	PPC_LL	r3,0(r1)	blrEXPORT_SYMBOL(current_stack_pointer)