1 // SPDX-License-Identifier: GPL-2.0
3 * Mapping of DWARF debug register numbers into register names.
5 * Copyright IBM Corp. 2010, 2017
6 * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
7 * Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
14 #include <linux/kernel.h>
15 #include <asm/ptrace.h>
17 #include <dwarf-regs.h>
18 #include "dwarf-regs-table.h"
20 const char *get_arch_regstr(unsigned int n)
22 return (n >= ARRAY_SIZE(s390_dwarf_regs)) ? NULL : s390_dwarf_regs[n];
26 * Convert the register name into an offset to struct pt_regs (kernel).
27 * This is required by the BPF prologue generator. The BPF
28 * program is called in the BPF overflow handler in the perf
31 int regs_query_register_offset(const char *name)
35 if (!name || strncmp(name, "%r", 2))
39 gpr = strtoul(name + 2, NULL, 10);
40 if (errno || gpr >= 16)
43 return offsetof(user_pt_regs, gprs) + 8 * gpr;