blob: dfddb3099bfa561e7648b8162613da34029da0e5 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
// SPDX-License-Identifier: GPL-2.0
/*
* Mapping of DWARF debug register numbers into register names.
*
* Copyright IBM Corp. 2010, 2017
* Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
*
*/
#include <errno.h>
#include <stddef.h>
#include <stdlib.h>
#include <linux/kernel.h>
#include <asm/ptrace.h>
#include <string.h>
#include <dwarf-regs.h>
#include "dwarf-regs-table.h"
const char *get_arch_regstr(unsigned int n)
{
return (n >= ARRAY_SIZE(s390_dwarf_regs)) ? NULL : s390_dwarf_regs[n];
}
/*
* Convert the register name into an offset to struct pt_regs (kernel).
* This is required by the BPF prologue generator. The BPF
* program is called in the BPF overflow handler in the perf
* core.
*/
int regs_query_register_offset(const char *name)
{
unsigned long gpr;
if (!name || strncmp(name, "%r", 2))
return -EINVAL;
errno = 0;
gpr = strtoul(name + 2, NULL, 10);
if (errno || gpr >= 16)
return -EINVAL;
return offsetof(user_pt_regs, gprs) + 8 * gpr;
}
|
