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Commit df791dc1 authored by Jiong Wang's avatar Jiong Wang Committed by Alexei Starovoitov
Browse files

tools: bpftool: teach cfg code about JMP32 



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

Reviewed-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: default avatarJiong Wang <jiong.wang@netronome.com>
Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 56cbd82e

tools/bpf/bpftool/cfg.c

+7 −2
Original line number Diff line number Diff line
@@ -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;