summaryrefslogtreecommitdiff
path: root/tools/perf
diff options
context:
space:
mode:
authorNaveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>2016-04-28 15:01:10 +0530
committerMichael Ellerman <mpe@ellerman.id.au>2016-05-11 21:54:06 +1000
commitf47822078dece7189cad0a5f472f148e5e916736 (patch)
tree5a8b4aa8b1123d1d1fb28dd7c97fb3edb795ed60 /tools/perf
parentc4522469e6418fb547fbcd9d3aeb73bea0f6f859 (diff)
downloadlinux-f47822078dece7189cad0a5f472f148e5e916736.tar.gz
perf tools: Fix perf regs mask generation
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 <naveen.n.rao@linux.vnet.ibm.com> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'tools/perf')
-rw-r--r--tools/perf/util/perf_regs.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/tools/perf/util/perf_regs.c b/tools/perf/util/perf_regs.c
index 6b8eb13e14e4..c4023f22f287 100644
--- a/tools/perf/util/perf_regs.c
+++ b/tools/perf/util/perf_regs.c
@@ -12,18 +12,18 @@ 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: