Release 4.16 tools/perf/arch/s390/util/dwarf-regs.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Mapping of DWARF debug register numbers into register names.
 *
 * Copyright IBM Corp. 2010, 2017
 * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>,
 *            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];
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
Heiko Carstens
23
82.14%
1
50.00%
Hendrik Brueckner
5
17.86%
1
50.00%
Total
28
100.00%
2
100.00%

/*
 * 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;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
Hendrik Brueckner
73
100.00%
1
100.00%
Total
73
100.00%
1
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Hendrik Brueckner
99
77.34%
2
40.00%
Heiko Carstens
27
21.09%
1
20.00%
Greg Kroah-Hartman
1
0.78%
1
20.00%
Cody P Schafer
1
0.78%
1
20.00%
Total
128
100.00%
5
100.00%
Directory: tools/perf/arch/s390/util

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