1 // SPDX-License-Identifier: GPL-2.0
2 #include <stdbool.h>
3 #include <stdlib.h>
4 #include <stdint.h>
5 #include <string.h>
6 #include <stdio.h>
7 #include "util/debug.h"
8 #include <subcmd/parse-options.h>
9 #include "util/perf_regs.h"
10 #include "util/parse-regs-options.h"
11
12 static int
__parse_regs(const struct option * opt,const char * str,int unset,bool intr)13 __parse_regs(const struct option *opt, const char *str, int unset, bool intr)
14 {
15 uint64_t *mode = (uint64_t *)opt->value;
16 const struct sample_reg *r = NULL;
17 char *s, *os = NULL, *p;
18 int ret = -1;
19 uint64_t mask;
20
21 if (unset)
22 return 0;
23
24 /*
25 * cannot set it twice
26 */
27 if (*mode)
28 return -1;
29
30 if (intr)
31 mask = arch__intr_reg_mask();
32 else
33 mask = arch__user_reg_mask();
34
35 /* str may be NULL in case no arg is passed to -I */
36 if (str) {
37 /* because str is read-only */
38 s = os = strdup(str);
39 if (!s)
40 return -1;
41
42 for (;;) {
43 p = strchr(s, ',');
44 if (p)
45 *p = '\0';
46
47 if (!strcmp(s, "?")) {
48 fprintf(stderr, "available registers: ");
49 #ifdef HAVE_PERF_REGS_SUPPORT
50 for (r = sample_reg_masks; r->name; r++) {
51 if (r->mask & mask)
52 fprintf(stderr, "%s ", r->name);
53 }
54 #endif
55 fputc('\n', stderr);
56 /* just printing available regs */
57 goto error;
58 }
59 #ifdef HAVE_PERF_REGS_SUPPORT
60 for (r = sample_reg_masks; r->name; r++) {
61 if ((r->mask & mask) && !strcasecmp(s, r->name))
62 break;
63 }
64 #endif
65 if (!r || !r->name) {
66 ui__warning("Unknown register \"%s\", check man page or run \"perf record %s?\"\n",
67 s, intr ? "-I" : "--user-regs=");
68 goto error;
69 }
70
71 *mode |= r->mask;
72
73 if (!p)
74 break;
75
76 s = p + 1;
77 }
78 }
79 ret = 0;
80
81 /* default to all possible regs */
82 if (*mode == 0)
83 *mode = mask;
84 error:
85 free(os);
86 return ret;
87 }
88
89 int
parse_user_regs(const struct option * opt,const char * str,int unset)90 parse_user_regs(const struct option *opt, const char *str, int unset)
91 {
92 return __parse_regs(opt, str, unset, false);
93 }
94
95 int
parse_intr_regs(const struct option * opt,const char * str,int unset)96 parse_intr_regs(const struct option *opt, const char *str, int unset)
97 {
98 return __parse_regs(opt, str, unset, true);
99 }
100