diff options
| author |   Ilya Leoshkevich <iii@linux.ibm.com> | 2021-10-13 18:09:01 +0200 |
|---|---|---|
| committer |   Andrii Nakryiko <andrii@kernel.org> | 2021-10-20 11:40:45 -0700 |
| commit | 961632d5416389a6f2e7478b674ac645c7e3ff01 (patch) | |
| tree | 85e4b85c09f0a2074a8cbcec4925bc80aecef238 /tools/lib/bpf/btf_dump.c | |
| parent | libbpf: Fix dumping big-endian bitfields (diff) | |
| download | wireguard-linux-961632d5416389a6f2e7478b674ac645c7e3ff01.tar.xz wireguard-linux-961632d5416389a6f2e7478b674ac645c7e3ff01.zip | |
libbpf: Fix dumping non-aligned __int128
Non-aligned integers are dumped as bitfields, which is supported for at
most 64-bit integers. Fix by using the same trick as
btf_dump_float_data(): copy non-aligned values to the local buffer.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211013160902.428340-4-iii@linux.ibm.com
Diffstat (limited to 'tools/lib/bpf/btf_dump.c')
| -rw-r--r-- | tools/lib/bpf/btf_dump.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/tools/lib/bpf/btf_dump.c b/tools/lib/bpf/btf_dump.c index 679bf34e3f47..e98c201f29b5 100644 --- a/tools/lib/bpf/btf_dump.c +++ b/tools/lib/bpf/btf_dump.c @@ -1670,9 +1670,10 @@ static int btf_dump_int_data(struct btf_dump *d, { __u8 encoding = btf_int_encoding(t); bool sign = encoding & BTF_INT_SIGNED; + char buf[16] __aligned(16); int sz = t->size; - if (sz == 0) { + if (sz == 0 || sz > sizeof(buf)) { pr_warn("unexpected size %d for id [%u]\n", sz, type_id); return -EINVAL; } @@ -1680,8 +1681,10 @@ static int btf_dump_int_data(struct btf_dump *d, /* handle packed int data - accesses of integers not aligned on * int boundaries can cause problems on some platforms. */ - if (!ptr_is_aligned(data, sz)) - return btf_dump_bitfield_data(d, t, data, 0, 0); + if (!ptr_is_aligned(data, sz)) { + memcpy(buf, data, sz); + data = buf; + } switch (sz) { case 16: { |