FM / unwind

/usr/share/systemtap/runtime/unwind

Name	Size	Mode	Actions
arm.h	1861	0644	edit dl rm
arm64.h	3027	0644	edit dl rm
i386.h	4024	0644	edit dl rm
mips.h	2112	0644	edit dl rm
ppc64.h	3057	0644	edit dl rm
riscv.h	1915	0644	edit dl rm
s390x.h	1831	0644	edit dl rm
unwind.h	14005	0644	edit dl rm
x86_64.h	5443	0644	edit dl rm

Edit: /usr/share/systemtap/runtime/unwind/s390x.h (1831B)

/* -*- linux-c -*-
 *
 * s390x dwarf unwinder header file
 * Copyright (C) 2011 Red Hat, Inc.
 *
 * This file is part of systemtap, and is free software.  You can
 * redistribute it and/or modify it under the terms of the GNU General
 * Public License (GPL); either version 2, or (at your option) any
 * later version.
 */
#ifndef _STP_S390X_UNWIND_H
#define _STP_S390X_UNWIND_H

#include <linux/sched.h>
#include <asm/ptrace.h>

#define _stp_get_unaligned(ptr) (*(ptr))

#define UNW_PC(frame)        (frame)->regs.psw.addr
#define UNW_SP(frame)        (frame)->regs.gprs[15]

#define STACK_LIMIT(ptr)     (((ptr) - 1) & ~(THREAD_SIZE - 1))

#define UNW_REGISTER_INFO \
	PTREGS_INFO(gprs[0]), \
	PTREGS_INFO(gprs[1]), \
	PTREGS_INFO(gprs[2]), \
	PTREGS_INFO(gprs[3]), \
	PTREGS_INFO(gprs[4]), \
	PTREGS_INFO(gprs[5]), \
	PTREGS_INFO(gprs[6]), \
	PTREGS_INFO(gprs[7]), \
	PTREGS_INFO(gprs[8]), \
	PTREGS_INFO(gprs[9]), \
	PTREGS_INFO(gprs[10]), \
	PTREGS_INFO(gprs[11]), \
	PTREGS_INFO(gprs[12]), \
	PTREGS_INFO(gprs[13]), \
	PTREGS_INFO(gprs[14]), \
	PTREGS_INFO(gprs[15]), \
	PTREGS_INFO(psw.addr), \
	PTREGS_INFO(psw.mask)

#define DWARF_REG_MAP(r) \
        ((r >= 0 && r <= 15) ? r /* gpr0-15 */	\
         : (r == 64) ? 16 /* PSW addr */	\
         : (r == 65) ? 17 /* PSW mask */	\
         : 9999)

#define UNW_PC_IDX 16
#define UNW_SP_IDX 15

#define UNW_SP_FROM_CFA 0 /* Stack pointer is just gprs15, normal cfi. */

static inline void arch_unw_init_frame_info(struct unwind_frame_info *info,
                                            /*const*/ struct pt_regs *regs,
					    int sanitize)
{
	if (&info->regs == regs) { /* happens when unwinding kernel->user */
		info->call_frame = 1;
		return;
	}

memset(info, 0, sizeof(*info));
	/* XXX handle sanitize??? */
	info->regs = *regs;
}

#endif /* _STP_S390X_UNWIND_H */

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