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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119/* 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 <linux/export.h>#include <asm/ppc_asm.h>#include <asm/unistd.h>#include <asm/asm-compat.h>#include <asm/asm-offsets.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,$+41: 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 32: 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) blrEXPORT_SYMBOL(current_stack_frame)