[PATCH 6.9 103/374] perf dwarf-aux: Fix build with HAVE_DWARF_CFI_SUPPORT

Greg Kroah-Hartman
2024-06-06T14:09:04Z

From: James Clark <james.clark@arm.com>

[ Upstream commit c9d492378faec5c1fb8ea1534c620f7320bbb23a ]

check_allowed_ops() is used from both HAVE_DWARF_GETLOCATIONS_SUPPORT
and HAVE_DWARF_CFI_SUPPORT sections, so move it into the right place so
that it's available when either are defined. This shows up when doing
a static cross compile for arm64:

$ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- LDFLAGS="-static" \
EXTRA_PERFLIBS="-lexpat"

util/dwarf-aux.c:1723:6: error: implicit declaration of function 'check_allowed_ops'

Fixes: 55442cc2f22d0727 ("perf dwarf-aux: Check allowed DWARF Ops")
Reviewed-by: Ian Rogers <irogers@google.com>
Signed-off-by: James Clark <james.clark@arm.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Leo Yan <leo.yan@linux.dev>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20240508141458.439017-1-james.clark@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
tools/perf/util/dwarf-aux.c | 56 ++++++++++++++++++-------------------
1 file changed, 28 insertions(+), 28 deletions(-)

diff --git a/tools/perf/util/dwarf-aux.c b/tools/perf/util/dwarf-aux.c
index ff1874ae0832e..f93e57e2fc42e 100644
--- a/tools/perf/util/dwarf-aux.c
+++ b/tools/perf/util/dwarf-aux.c
@@ -1168,6 +1168,34 @@ static int offset_from_dwarf_op(Dwarf_Op *op)
}
return -1;
}
+
+static bool check_allowed_ops(Dwarf_Op *ops, size_t nops)
+{
+ /* The first op is checked separately */
+ ops++;
+ nops--;
+
+ /*
+ * It needs to make sure if the location expression matches to the given
+ * register and offset exactly. Thus it rejects any complex expressions
+ * and only allows a few of selected operators that doesn't change the
+ * location.
+ */
+ while (nops) {
+ switch (ops->atom) {
+ case DW_OP_stack_value:
+ case DW_OP_deref_size:
+ case DW_OP_deref:
+ case DW_OP_piece:
+ break;
+ default:
+ return false;
+ }
+ ops++;
+ nops--;
+ }
+ return true;
+}
#endif /* HAVE_DWARF_GETLOCATIONS_SUPPORT || HAVE_DWARF_CFI_SUPPORT */

#ifdef HAVE_DWARF_GETLOCATIONS_SUPPORT
@@ -1345,34 +1373,6 @@ static bool match_var_offset(Dwarf_Die *die_mem, struct find_var_data *data,
return true;
}

-static bool check_allowed_ops(Dwarf_Op *ops, size_t nops)
-{
- /* The first op is checked separately */
- ops++;
- nops--;
-
- /*
- * It needs to make sure if the location expression matches to the given
- * register and offset exactly. Thus it rejects any complex expressions
- * and only allows a few of selected operators that doesn't change the
- * location.
- */
- while (nops) {
- switch (ops->atom) {
- case DW_OP_stack_value:
- case DW_OP_deref_size:
- case DW_OP_deref:
- case DW_OP_piece:
- break;
- default:
- return false;
- }
- ops++;
- nops--;
- }
- return true;
-}
-
/* Only checks direct child DIEs in the given scope. */
static int __die_find_var_reg_cb(Dwarf_Die *die_mem, void *arg)
{
--
2.43.0