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
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
// SPDX-License-Identifier: GPL-2.0
#include <stdbool.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <stdio.h>
#include "util/debug.h"
#include <dwarf-regs.h>
#include <subcmd/parse-options.h>
#include "util/perf_regs.h"
#include "util/parse-regs-options.h"
static void list_perf_regs(FILE *fp, uint64_t mask)
{
const char *last_name = NULL;
fprintf(fp, "available registers: ");
for (int reg = 0; reg < 64; reg++) {
const char *name;
if (((1ULL << reg) & mask) == 0)
continue;
name = perf_reg_name(reg, EM_HOST, EF_HOST);
if (name && (!last_name || strcmp(last_name, name)))
fprintf(fp, "%s%s", reg > 0 ? " " : "", name);
last_name = name;
}
fputc('\n', fp);
}
static uint64_t name_to_perf_reg_mask(const char *to_match, uint64_t mask)
{
uint64_t reg_mask = 0;
for (int reg = 0; reg < 64; reg++) {
const char *name;
if (((1ULL << reg) & mask) == 0)
continue;
name = perf_reg_name(reg, EM_HOST, EF_HOST);
if (!name)
continue;
if (!strcasecmp(to_match, name))
reg_mask |= 1ULL << reg;
}
return reg_mask;
}
static int
__parse_regs(const struct option *opt, const char *str, int unset, bool intr)
{
uint64_t *mode = (uint64_t *)opt->value;
char *s, *os = NULL, *p;
int ret = -1;
uint64_t mask;
if (unset)
return 0;
/*
* cannot set it twice
*/
if (*mode)
return -1;
mask = intr ? perf_intr_reg_mask(EM_HOST) : perf_user_reg_mask(EM_HOST);
/* str may be NULL in case no arg is passed to -I */
if (!str) {
*mode = mask;
return 0;
}
/* because str is read-only */
s = os = strdup(str);
if (!s)
return -1;
for (;;) {
uint64_t reg_mask;
p = strchr(s, ',');
if (p)
*p = '\0';
if (!strcmp(s, "?")) {
list_perf_regs(stderr, mask);
goto error;
}
reg_mask = name_to_perf_reg_mask(s, mask);
if (reg_mask == 0) {
ui__warning("Unknown register \"%s\", check man page or run \"perf record %s?\"\n",
s, intr ? "-I" : "--user-regs=");
goto error;
}
*mode |= reg_mask;
if (!p)
break;
s = p + 1;
}
ret = 0;
error:
free(os);
return ret;
}
int
parse_user_regs(const struct option *opt, const char *str, int unset)
{
return __parse_regs(opt, str, unset, false);
}
int
parse_intr_regs(const struct option *opt, const char *str, int unset)
{
return __parse_regs(opt, str, unset, true);
}
|
