From e9c95ab5e76f8385f30ae210493e9429a2d48ce8 Mon Sep 17 00:00:00 2001 From: "Naveen N. Rao" Date: Thu, 28 Apr 2016 15:01:10 +0530 Subject: perf tools: Fix perf regs mask generation commit f47822078dece7189cad0a5f472f148e5e916736 upstream. On some architectures (powerpc in particular), the number of registers exceeds what can be represented in an integer bitmask. Ensure we generate the proper bitmask on such platforms. Fixes: 71ad0f5e4 ("perf tools: Support for DWARF CFI unwinding on post processing") Signed-off-by: Naveen N. Rao Acked-by: Arnaldo Carvalho de Melo Signed-off-by: Michael Ellerman Signed-off-by: Ben Hutchings --- tools/perf/util/perf_regs.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'tools') diff --git a/tools/perf/util/perf_regs.c b/tools/perf/util/perf_regs.c index 43168fb0d9a2..2fb6f2afb84f 100644 --- a/tools/perf/util/perf_regs.c +++ b/tools/perf/util/perf_regs.c @@ -7,18 +7,18 @@ int perf_reg_value(u64 *valp, struct regs_dump *regs, int id) int i, idx = 0; u64 mask = regs->mask; - if (regs->cache_mask & (1 << id)) + if (regs->cache_mask & (1ULL << id)) goto out; - if (!(mask & (1 << id))) + if (!(mask & (1ULL << id))) return -EINVAL; for (i = 0; i < id; i++) { - if (mask & (1 << i)) + if (mask & (1ULL << i)) idx++; } - regs->cache_mask |= (1 << id); + regs->cache_mask |= (1ULL << id); regs->cache_regs[id] = regs->regs[idx]; out: -- cgit v1.2.3