[bpf,2/6] tools: bpftool: fix format strings and arguments for jsonw_printf()
diff mbox series

Message ID 20190815143220.4199-3-quentin.monnet@netronome.com
State Accepted
Delegated to: BPF Maintainers
Headers show
Series
  • tools: bpftool: fix printf()-like functions
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Commit Message

Quentin Monnet Aug. 15, 2019, 2:32 p.m. UTC
There are some mismatches between format strings and arguments passed to
jsonw_printf() in the BTF dumper for bpftool, which seems harmless but
may result in warnings if the "__printf()" attribute is used correctly
for jsonw_printf(). Let's fix relevant format strings and type cast.

Fixes: b12d6ec09730 ("bpf: btf: add btf print functionality")
Signed-off-by: Quentin Monnet <quentin.monnet@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
---
 tools/bpf/bpftool/btf_dumper.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

Patch
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diff --git a/tools/bpf/bpftool/btf_dumper.c b/tools/bpf/bpftool/btf_dumper.c
index 8cafb9b31467..d66131f69689 100644
--- a/tools/bpf/bpftool/btf_dumper.c
+++ b/tools/bpf/bpftool/btf_dumper.c
@@ -26,9 +26,9 @@  static void btf_dumper_ptr(const void *data, json_writer_t *jw,
 			   bool is_plain_text)
 {
 	if (is_plain_text)
-		jsonw_printf(jw, "%p", *(unsigned long *)data);
+		jsonw_printf(jw, "%p", data);
 	else
-		jsonw_printf(jw, "%u", *(unsigned long *)data);
+		jsonw_printf(jw, "%lu", *(unsigned long *)data);
 }
 
 static int btf_dumper_modifier(const struct btf_dumper *d, __u32 type_id,
@@ -216,7 +216,7 @@  static int btf_dumper_int(const struct btf_type *t, __u8 bit_offset,
 	switch (BTF_INT_ENCODING(*int_type)) {
 	case 0:
 		if (BTF_INT_BITS(*int_type) == 64)
-			jsonw_printf(jw, "%lu", *(__u64 *)data);
+			jsonw_printf(jw, "%llu", *(__u64 *)data);
 		else if (BTF_INT_BITS(*int_type) == 32)
 			jsonw_printf(jw, "%u", *(__u32 *)data);
 		else if (BTF_INT_BITS(*int_type) == 16)
@@ -229,7 +229,7 @@  static int btf_dumper_int(const struct btf_type *t, __u8 bit_offset,
 		break;
 	case BTF_INT_SIGNED:
 		if (BTF_INT_BITS(*int_type) == 64)
-			jsonw_printf(jw, "%ld", *(long long *)data);
+			jsonw_printf(jw, "%lld", *(long long *)data);
 		else if (BTF_INT_BITS(*int_type) == 32)
 			jsonw_printf(jw, "%d", *(int *)data);
 		else if (BTF_INT_BITS(*int_type) == 16)