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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
| commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
| tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /tools/perf/util/perf_regs.c | |
| parent | Initial commit. (diff) | |
| download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip | |
Adding upstream version 4.19.249.upstream/4.19.249
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/perf/util/perf_regs.c')
| -rw-r--r-- | tools/perf/util/perf_regs.c | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/tools/perf/util/perf_regs.c b/tools/perf/util/perf_regs.c new file mode 100644 index 000000000..2acfcc527 --- /dev/null +++ b/tools/perf/util/perf_regs.c @@ -0,0 +1,40 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <errno.h> +#include "perf_regs.h" +#include "event.h" + +const struct sample_reg __weak sample_reg_masks[] = { + SMPL_REG_END +}; + +int __weak arch_sdt_arg_parse_op(char *old_op __maybe_unused, + char **new_op __maybe_unused) +{ + return SDT_ARG_SKIP; +} + +#ifdef HAVE_PERF_REGS_SUPPORT +int perf_reg_value(u64 *valp, struct regs_dump *regs, int id) +{ + int i, idx = 0; + u64 mask = regs->mask; + + if (regs->cache_mask & (1ULL << id)) + goto out; + + if (!(mask & (1ULL << id))) + return -EINVAL; + + for (i = 0; i < id; i++) { + if (mask & (1ULL << i)) + idx++; + } + + regs->cache_mask |= (1ULL << id); + regs->cache_regs[id] = regs->regs[idx]; + +out: + *valp = regs->cache_regs[id]; + return 0; +} +#endif |