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 |
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 | for (r = arch__sample_reg_masks(); r->name; r++) { |
50 | if (r->mask & mask) |
51 | fprintf(stderr, "%s " , r->name); |
52 | } |
53 | fputc('\n', stderr); |
54 | /* just printing available regs */ |
55 | goto error; |
56 | } |
57 | for (r = arch__sample_reg_masks(); r->name; r++) { |
58 | if ((r->mask & mask) && !strcasecmp(s, r->name)) |
59 | break; |
60 | } |
61 | if (!r || !r->name) { |
62 | ui__warning("Unknown register \"%s\", check man page or run \"perf record %s?\"\n" , |
63 | s, intr ? "-I" : "--user-regs=" ); |
64 | goto error; |
65 | } |
66 | |
67 | *mode |= r->mask; |
68 | |
69 | if (!p) |
70 | break; |
71 | |
72 | s = p + 1; |
73 | } |
74 | } |
75 | ret = 0; |
76 | |
77 | /* default to all possible regs */ |
78 | if (*mode == 0) |
79 | *mode = mask; |
80 | error: |
81 | free(os); |
82 | return ret; |
83 | } |
84 | |
85 | int |
86 | parse_user_regs(const struct option *opt, const char *str, int unset) |
87 | { |
88 | return __parse_regs(opt, str, unset, false); |
89 | } |
90 | |
91 | int |
92 | parse_intr_regs(const struct option *opt, const char *str, int unset) |
93 | { |
94 | return __parse_regs(opt, str, unset, true); |
95 | } |
96 | |