| // SPDX-License-Identifier: GPL-2.0 |
| #include "perf.h" |
| #include "util/util.h" |
| #include "util/debug.h" |
| #include <subcmd/parse-options.h> |
| #include "util/parse-regs-options.h" |
| |
| int |
| parse_regs(const struct option *opt, const char *str, int unset) |
| { |
| uint64_t *mode = (uint64_t *)opt->value; |
| const struct sample_reg *r; |
| char *s, *os = NULL, *p; |
| int ret = -1; |
| |
| if (unset) |
| return 0; |
| |
| /* |
| * cannot set it twice |
| */ |
| if (*mode) |
| return -1; |
| |
| /* str may be NULL in case no arg is passed to -I */ |
| if (str) { |
| /* because str is read-only */ |
| s = os = strdup(str); |
| if (!s) |
| return -1; |
| |
| for (;;) { |
| p = strchr(s, ','); |
| if (p) |
| *p = '\0'; |
| |
| if (!strcmp(s, "?")) { |
| fprintf(stderr, "available registers: "); |
| for (r = sample_reg_masks; r->name; r++) { |
| fprintf(stderr, "%s ", r->name); |
| } |
| fputc('\n', stderr); |
| /* just printing available regs */ |
| return -1; |
| } |
| for (r = sample_reg_masks; r->name; r++) { |
| if (!strcasecmp(s, r->name)) |
| break; |
| } |
| if (!r->name) { |
| ui__warning("unknown register %s," |
| " check man page\n", s); |
| goto error; |
| } |
| |
| *mode |= r->mask; |
| |
| if (!p) |
| break; |
| |
| s = p + 1; |
| } |
| } |
| ret = 0; |
| |
| /* default to all possible regs */ |
| if (*mode == 0) |
| *mode = PERF_REGS_MASK; |
| error: |
| free(os); |
| return ret; |
| } |