119 lines
2.3 KiB
ArmAsm
119 lines
2.3 KiB
ArmAsm
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||
|
|
/*
|
||
|
|
* 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.
|
||
|
|
*/
|
||
|
|
#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.
|
||
|
|
|
||
|
|
* add_reloc_offset(x) returns x + reloc_offset().
|
||
|
|
*/
|
||
|
|
|
||
|
|
_GLOBAL(reloc_offset)
|
||
|
|
li r3, 0
|
||
|
|
_GLOBAL(add_reloc_offset)
|
||
|
|
mflr r0
|
||
|
|
bcl 20,31,$+4
|
||
|
|
1: mflr r5
|
||
|
|
PPC_LL r4,(2f-1b)(r5)
|
||
|
|
subf r5,r4,r5
|
||
|
|
add r3,r3,r5
|
||
|
|
mtlr r0
|
||
|
|
blr
|
||
|
|
_ASM_NOKPROBE_SYMBOL(reloc_offset)
|
||
|
|
_ASM_NOKPROBE_SYMBOL(add_reloc_offset)
|
||
|
|
|
||
|
|
.align 3
|
||
|
|
2: PPC_LONG 1b
|
||
|
|
|
||
|
|
_GLOBAL(setjmp)
|
||
|
|
mflr r0
|
||
|
|
PPC_STL r0,0(r3)
|
||
|
|
PPC_STL r1,SZL(r3)
|
||
|
|
PPC_STL r2,2*SZL(r3)
|
||
|
|
#ifdef CONFIG_PPC32
|
||
|
|
mfcr r12
|
||
|
|
stmw r12, 3*SZL(r3)
|
||
|
|
#else
|
||
|
|
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)
|
||
|
|
#endif
|
||
|
|
li r3,0
|
||
|
|
blr
|
||
|
|
|
||
|
|
_GLOBAL(longjmp)
|
||
|
|
#ifdef CONFIG_PPC32
|
||
|
|
lmw r12, 3*SZL(r3)
|
||
|
|
mtcrf 0x38, r12
|
||
|
|
#else
|
||
|
|
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
|
||
|
|
#endif
|
||
|
|
PPC_LL r0,0(r3)
|
||
|
|
PPC_LL r1,SZL(r3)
|
||
|
|
PPC_LL r2,2*SZL(r3)
|
||
|
|
mtlr r0
|
||
|
|
mr. r3, r4
|
||
|
|
bnelr
|
||
|
|
li r3, 1
|
||
|
|
blr
|
||
|
|
|
||
|
|
_GLOBAL(current_stack_frame)
|
||
|
|
PPC_LL r3,0(r1)
|
||
|
|
blr
|
||
|
|
EXPORT_SYMBOL(current_stack_frame)
|