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| author | Ilya Leoshkevich <iii@linux.ibm.com> | 2021-10-26 03:08:26 +0200 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2021-10-25 20:39:41 -0700 |
| commit | 45f2bebc8079788f62f22d9e8b2819afb1789d7b (patch) | |
| tree | cb673afcb1620226a4947ed05c75ef34d6734356 /tools/lib | |
| parent | 124c6003bf12351a6feef231849d570cd03c760c (diff) | |
| download | linux-45f2bebc8079788f62f22d9e8b2819afb1789d7b.tar.bz2 | |
libbpf: Fix endianness detection in BPF_CORE_READ_BITFIELD_PROBED()
__BYTE_ORDER is supposed to be defined by a libc, and __BYTE_ORDER__ -
by a compiler. bpf_core_read.h checks __BYTE_ORDER == __LITTLE_ENDIAN,
which is true if neither are defined, leading to incorrect behavior on
big-endian hosts if libc headers are not included, which is often the
case.
Fixes: ee26dade0e3b ("libbpf: Add support for relocatable bitfields")
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211026010831.748682-2-iii@linux.ibm.com
Diffstat (limited to 'tools/lib')
| -rw-r--r-- | tools/lib/bpf/bpf_core_read.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/lib/bpf/bpf_core_read.h b/tools/lib/bpf/bpf_core_read.h index 09ebe3db5f2f..e4aa9996a550 100644 --- a/tools/lib/bpf/bpf_core_read.h +++ b/tools/lib/bpf/bpf_core_read.h @@ -40,7 +40,7 @@ enum bpf_enum_value_kind { #define __CORE_RELO(src, field, info) \ __builtin_preserve_field_info((src)->field, BPF_FIELD_##info) -#if __BYTE_ORDER == __LITTLE_ENDIAN +#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ #define __CORE_BITFIELD_PROBE_READ(dst, src, fld) \ bpf_probe_read_kernel( \ (void *)dst, \ |