Thread (32 messages) 32 messages, 4 authors, 2021-02-26
STALE1956d REVIEWED: 4 (4M)
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  5. v5 [diff vs current]

[PATCH bpf-next v3 07/11] libbpf: move function is_ldimm64() earlier in libbpf.c

From: Yonghong Song <hidden>
Date: 2021-02-25 07:34:16
Subsystem: bpf [general] (safe dynamic programs and tools), bpf [library] (libbpf), the rest · Maintainers: Alexei Starovoitov, Daniel Borkmann, Andrii Nakryiko, Eduard Zingerman, Kumar Kartikeya Dwivedi, Linus Torvalds

Move function is_ldimm64() close to the beginning of libbpf.c,
so it can be reused by later code and the next patch as well.
There is no functionality change.

Acked-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Yonghong Song <redacted>
---
 tools/lib/bpf/libbpf.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index d43cc3f29dae..21a3eedf070d 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -574,6 +574,11 @@ static bool insn_is_subprog_call(const struct bpf_insn *insn)
 	       insn->off == 0;
 }
 
+static bool is_ldimm64(struct bpf_insn *insn)
+{
+	return insn->code == (BPF_LD | BPF_IMM | BPF_DW);
+}
+
 static int
 bpf_object__init_prog(struct bpf_object *obj, struct bpf_program *prog,
 		      const char *name, size_t sec_idx, const char *sec_name,
@@ -3395,7 +3400,7 @@ static int bpf_program__record_reloc(struct bpf_program *prog,
 		return 0;
 	}
 
-	if (insn->code != (BPF_LD | BPF_IMM | BPF_DW)) {
+	if (!is_ldimm64(insn)) {
 		pr_warn("prog '%s': invalid relo against '%s' for insns[%d].code 0x%x\n",
 			prog->name, sym_name, insn_idx, insn->code);
 		return -LIBBPF_ERRNO__RELOC;
@@ -5566,11 +5571,6 @@ static void bpf_core_poison_insn(struct bpf_program *prog, int relo_idx,
 	insn->imm = 195896080; /* => 0xbad2310 => "bad relo" */
 }
 
-static bool is_ldimm64(struct bpf_insn *insn)
-{
-	return insn->code == (BPF_LD | BPF_IMM | BPF_DW);
-}
-
 static int insn_bpf_size_to_bytes(struct bpf_insn *insn)
 {
 	switch (BPF_SIZE(insn->code)) {
-- 
2.24.1
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