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