[PATCH bpf-next v4 05/16] tools: bpftool: teach cfg code about JMP32

[Jiong Wang]

The cfg code need to be aware of the new JMP32 instruction class so it
could partition functions correctly.

Reviewed-by: Jakub Kicinski <jakub.kicin...@netronome.com>
Signed-off-by: Jiong Wang <jiong.w...@netronome.com>
---
 tools/bpf/bpftool/cfg.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/tools/bpf/bpftool/cfg.c b/tools/bpf/bpftool/cfg.c
index 31f0db4..3e21f99 100644
--- a/tools/bpf/bpftool/cfg.c
+++ b/tools/bpf/bpftool/cfg.c
@@ -157,6 +157,11 @@ static bool cfg_partition_funcs(struct cfg *cfg, struct 
bpf_insn *cur,
        return false;
 }
 
+static bool is_jmp_insn(u8 code)
+{
+       return BPF_CLASS(code) == BPF_JMP || BPF_CLASS(code) == BPF_JMP32;
+}
+
 static bool func_partition_bb_head(struct func_node *func)
 {
        struct bpf_insn *cur, *end;
@@ -170,7 +175,7 @@ static bool func_partition_bb_head(struct func_node *func)
                return true;
 
        for (; cur <= end; cur++) {
-               if (BPF_CLASS(cur->code) == BPF_JMP) {
+               if (is_jmp_insn(cur->code)) {
                        u8 opcode = BPF_OP(cur->code);
 
                        if (opcode == BPF_EXIT || opcode == BPF_CALL)
@@ -296,7 +301,7 @@ static bool func_add_bb_edges(struct func_node *func)
                e->src = bb;
 
                insn = bb->tail;
-               if (BPF_CLASS(insn->code) != BPF_JMP ||
+               if (!is_jmp_insn(insn->code) ||
                    BPF_OP(insn->code) == BPF_EXIT) {
                        e->dst = bb_next(bb);
                        e->flags |= EDGE_FLAG_FALLTHROUGH;
-- 
2.7.4