From: Andrii Nakryiko <andriin@fb.com>
To: <bpf@vger.kernel.org>, <netdev@vger.kernel.org>, <ast@fb.com>,
<daniel@iogearbox.net>
Cc: <andrii.nakryiko@gmail.com>, <kernel-team@fb.com>,
Andrii Nakryiko <andriin@fb.com>
Subject: [PATCH v3 bpf 6/9] libbpf: enforce 64-bitness of BTF for BPF object files
Date: Thu, 13 Aug 2020 13:49:42 -0700 [thread overview]
Message-ID: <20200813204945.1020225-7-andriin@fb.com> (raw)
In-Reply-To: <20200813204945.1020225-1-andriin@fb.com>
BPF object files are always targeting 64-bit BPF target architecture, so
enforce that at BTF level as well.
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
---
tools/lib/bpf/libbpf.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 4a8524b2dda1..738579c338a5 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -2434,6 +2434,8 @@ static int bpf_object__init_btf(struct bpf_object *obj,
BTF_ELF_SEC, err);
goto out;
}
+ /* enforce 8-byte pointers for BPF-targeted BTFs */
+ btf__set_pointer_size(obj->btf, 8);
err = 0;
}
if (btf_ext_data) {
@@ -2542,6 +2544,8 @@ static int bpf_object__sanitize_and_load_btf(struct bpf_object *obj)
if (IS_ERR(kern_btf))
return PTR_ERR(kern_btf);
+ /* enforce 8-byte pointers for BPF-targeted BTFs */
+ btf__set_pointer_size(obj->btf, 8);
bpf_object__sanitize_btf(obj, kern_btf);
}
--
2.24.1
next prev parent reply other threads:[~2020-08-13 21:10 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-13 20:49 [PATCH v3 bpf 0/9] Fix various issues with 32-bit libbpf Andrii Nakryiko
2020-08-13 20:49 ` [PATCH v3 bpf 1/9] tools/bpftool: fix compilation warnings in 32-bit mode Andrii Nakryiko
2020-08-13 20:49 ` [PATCH v3 bpf 2/9] selftest/bpf: " Andrii Nakryiko
2020-08-13 20:49 ` [PATCH v3 bpf 3/9] libbpf: fix BTF-defined map-in-map initialization on 32-bit host arches Andrii Nakryiko
2020-08-13 20:49 ` [PATCH v3 bpf 4/9] libbpf: handle BTF pointer sizes more carefully Andrii Nakryiko
2020-08-13 20:49 ` [PATCH v3 bpf 5/9] selftests/bpf: fix btf_dump test cases on 32-bit arches Andrii Nakryiko
2020-08-13 20:49 ` Andrii Nakryiko [this message]
2020-08-13 20:49 ` [PATCH v3 bpf 7/9] selftests/bpf: correct various core_reloc 64-bit assumptions Andrii Nakryiko
2020-08-13 20:49 ` [PATCH v3 bpf 8/9] tools/bpftool: generate data section struct with conservative alignment Andrii Nakryiko
2020-08-13 20:49 ` [PATCH v3 bpf 9/9] selftests/bpf: make test_varlen work with 32-bit user-space arch Andrii Nakryiko
2020-08-14 0:08 ` [PATCH v3 bpf 0/9] Fix various issues with 32-bit libbpf Alexei Starovoitov
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