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; 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 = 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 return -1; 56 } 57 for (r = sample_reg_masks; r->name; r++) { 58 if ((r->mask & mask) && !strcasecmp(s, r->name)) 59 break; 60 } 61 if (!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