// 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; }