From 76cb841cb886eef6b3bee341a2266c76578724ad Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Mon, 6 May 2024 03:02:30 +0200 Subject: Adding upstream version 4.19.249. Signed-off-by: Daniel Baumann --- tools/perf/util/perf_regs.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 tools/perf/util/perf_regs.c (limited to 'tools/perf/util/perf_regs.c') 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 +#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 -- cgit v1.2.3