[PATCH 3/3] perf tools: Fix perf regs mask generation

[Chandan Kumar]

From: "Naveen N. Rao" <naveen.n....@linux.vnet.ibm.com>

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....@linux.vnet.ibm.com>
---
 tools/perf/util/perf_regs.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tools/perf/util/perf_regs.c b/tools/perf/util/perf_regs.c
index 6b8eb13..c4023f2 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:
-- 
1.9.3