tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2#include "perf.h"
3#include "util/util.h"
4#include "util/debug.h"
5#include <subcmd/parse-options.h>
6#include "util/parse-regs-options.h"
7
8static int
9__parse_regs(const struct option *opt, const char *str, int unset, bool intr)
10{
11 uint64_t *mode = (uint64_t *)opt->value;
12 const struct sample_reg *r;
13 char *s, *os = NULL, *p;
14 int ret = -1;
15 uint64_t mask;
16
17 if (unset)
18 return 0;
19
20 /*
21 * cannot set it twice
22 */
23 if (*mode)
24 return -1;
25
26 if (intr)
27 mask = arch__intr_reg_mask();
28 else
29 mask = arch__user_reg_mask();
30
31 /* str may be NULL in case no arg is passed to -I */
32 if (str) {
33 /* because str is read-only */
34 s = os = strdup(str);
35 if (!s)
36 return -1;
37
38 for (;;) {
39 p = strchr(s, ',');
40 if (p)
41 *p = '\0';
42
43 if (!strcmp(s, "?")) {
44 fprintf(stderr, "available registers: ");
45 for (r = sample_reg_masks; r->name; r++) {
46 if (r->mask & mask)
47 fprintf(stderr, "%s ", r->name);
48 }
49 fputc('\n', stderr);
50 /* just printing available regs */
51 return -1;
52 }
53 for (r = sample_reg_masks; r->name; r++) {
54 if ((r->mask & mask) && !strcasecmp(s, r->name))
55 break;
56 }
57 if (!r->name) {
58 ui__warning("Unknown register \"%s\", check man page or run \"perf record %s?\"\n",
59 s, intr ? "-I" : "--user-regs=");
60 goto error;
61 }
62
63 *mode |= r->mask;
64
65 if (!p)
66 break;
67
68 s = p + 1;
69 }
70 }
71 ret = 0;
72
73 /* default to all possible regs */
74 if (*mode == 0)
75 *mode = mask;
76error:
77 free(os);
78 return ret;
79}
80
81int
82parse_user_regs(const struct option *opt, const char *str, int unset)
83{
84 return __parse_regs(opt, str, unset, false);
85}
86
87int
88parse_intr_regs(const struct option *opt, const char *str, int unset)
89{
90 return __parse_regs(opt, str, unset, true);
91}