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 8 static 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; 76 error: 77 free(os); 78 return ret; 79 } 80 81 int 82 parse_user_regs(const struct option *opt, const char *str, int unset) 83 { 84 return __parse_regs(opt, str, unset, false); 85 } 86 87 int 88 parse_intr_regs(const struct option *opt, const char *str, int unset) 89 { 90 return __parse_regs(opt, str, unset, true); 91 } 92