From: Masami Hiramatsu <mhiramat@redhat.com>
Date: Mon, 15 Mar 2010 17:02:28 +0000 (-0400)
Subject: perf probe: Fix offset to allow signed value
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=67c7ff7c56f38a8ab338fbbfe366621ce6303ba1;p=openwrt%2Fstaging%2Fblogic.git

perf probe: Fix offset to allow signed value

Fix dereference offset to intmax_t from uintmax_t, because
it can have negative values (for example local variable's offset
from frame pointer).

Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com>
Cc: systemtap <systemtap@sources.redhat.com>
Cc: DLE <dle-develop@lists.sourceforge.net>
LKML-Reference: <20100315170228.31852.71946.stgit@localhost6.localdomain6>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/tools/perf/util/probe-finder.c b/tools/perf/util/probe-finder.c
index f9cbbf18e6ca..0e8c8f1594ec 100644
--- a/tools/perf/util/probe-finder.c
+++ b/tools/perf/util/probe-finder.c
@@ -333,8 +333,8 @@ static void show_location(Dwarf_Op *op, struct probe_finder *pf)
 		die("%u exceeds max register number.", regn);
 
 	if (deref)
-		ret = snprintf(pf->buf, pf->len, " %s=+%ju(%s)",
-			       pf->var, (uintmax_t)offs, regs);
+		ret = snprintf(pf->buf, pf->len, " %s=%+jd(%s)",
+			       pf->var, (intmax_t)offs, regs);
 	else
 		ret = snprintf(pf->buf, pf->len, " %s=%s", pf->var, regs);
 	DIE_IF(ret < 0);