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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
tree | a94efe259b9009378be6d90eb30d2b019d95c194 /tools/perf/util/parse-regs-options.c | |
parent | Initial commit. (diff) | |
download | linux-upstream.tar.xz linux-upstream.zip |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/perf/util/parse-regs-options.c')
-rw-r--r-- | tools/perf/util/parse-regs-options.c | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/tools/perf/util/parse-regs-options.c b/tools/perf/util/parse-regs-options.c new file mode 100644 index 000000000..a4a100425 --- /dev/null +++ b/tools/perf/util/parse-regs-options.c @@ -0,0 +1,99 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <stdbool.h> +#include <stdlib.h> +#include <stdint.h> +#include <string.h> +#include <stdio.h> +#include "util/debug.h" +#include <subcmd/parse-options.h> +#include "util/perf_regs.h" +#include "util/parse-regs-options.h" + +static int +__parse_regs(const struct option *opt, const char *str, int unset, bool intr) +{ + uint64_t *mode = (uint64_t *)opt->value; + const struct sample_reg *r = NULL; + char *s, *os = NULL, *p; + int ret = -1; + uint64_t mask; + + if (unset) + return 0; + + /* + * cannot set it twice + */ + if (*mode) + return -1; + + if (intr) + mask = arch__intr_reg_mask(); + else + mask = arch__user_reg_mask(); + + /* 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: "); +#ifdef HAVE_PERF_REGS_SUPPORT + for (r = sample_reg_masks; r->name; r++) { + if (r->mask & mask) + fprintf(stderr, "%s ", r->name); + } +#endif + fputc('\n', stderr); + /* just printing available regs */ + goto error; + } +#ifdef HAVE_PERF_REGS_SUPPORT + for (r = sample_reg_masks; r->name; r++) { + if ((r->mask & mask) && !strcasecmp(s, r->name)) + break; + } +#endif + if (!r || !r->name) { + ui__warning("Unknown register \"%s\", check man page or run \"perf record %s?\"\n", + s, intr ? "-I" : "--user-regs="); + goto error; + } + + *mode |= r->mask; + + if (!p) + break; + + s = p + 1; + } + } + ret = 0; + + /* default to all possible regs */ + if (*mode == 0) + *mode = mask; +error: + free(os); + return ret; +} + +int +parse_user_regs(const struct option *opt, const char *str, int unset) +{ + return __parse_regs(opt, str, unset, false); +} + +int +parse_intr_regs(const struct option *opt, const char *str, int unset) +{ + return __parse_regs(opt, str, unset, true); +} |