1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * S390 Version 4*4882a593Smuzhiyun * Copyright IBM Corp. 2002, 2011 5*4882a593Smuzhiyun * Author(s): Thomas Spatzier (tspat@de.ibm.com) 6*4882a593Smuzhiyun * Author(s): Mahesh Salgaonkar (mahesh@linux.vnet.ibm.com) 7*4882a593Smuzhiyun * Author(s): Heinz Graalfs (graalfs@linux.vnet.ibm.com) 8*4882a593Smuzhiyun * Author(s): Andreas Krebbel (krebbel@linux.vnet.ibm.com) 9*4882a593Smuzhiyun * 10*4882a593Smuzhiyun * @remark Copyright 2002-2011 OProfile authors 11*4882a593Smuzhiyun */ 12*4882a593Smuzhiyun 13*4882a593Smuzhiyun #include <linux/oprofile.h> 14*4882a593Smuzhiyun #include <linux/init.h> 15*4882a593Smuzhiyun #include <asm/processor.h> 16*4882a593Smuzhiyun #include <asm/unwind.h> 17*4882a593Smuzhiyun s390_backtrace(struct pt_regs * regs,unsigned int depth)18*4882a593Smuzhiyunstatic void s390_backtrace(struct pt_regs *regs, unsigned int depth) 19*4882a593Smuzhiyun { 20*4882a593Smuzhiyun struct unwind_state state; 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun unwind_for_each_frame(&state, current, regs, 0) { 23*4882a593Smuzhiyun if (depth-- == 0) 24*4882a593Smuzhiyun break; 25*4882a593Smuzhiyun oprofile_add_trace(state.ip); 26*4882a593Smuzhiyun } 27*4882a593Smuzhiyun } 28*4882a593Smuzhiyun oprofile_arch_init(struct oprofile_operations * ops)29*4882a593Smuzhiyunint __init oprofile_arch_init(struct oprofile_operations *ops) 30*4882a593Smuzhiyun { 31*4882a593Smuzhiyun ops->backtrace = s390_backtrace; 32*4882a593Smuzhiyun return 0; 33*4882a593Smuzhiyun } 34*4882a593Smuzhiyun oprofile_arch_exit(void)35*4882a593Smuzhiyunvoid oprofile_arch_exit(void) 36*4882a593Smuzhiyun { 37*4882a593Smuzhiyun } 38