diff options
| author | Anton Protopopov <a.s.protopopov@gmail.com> | 2025-11-05 09:04:07 +0000 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2025-11-05 17:53:23 -0800 |
| commit | bc414d35831bffae725b249c8650669ed100e5f7 (patch) | |
| tree | 2a42aec9ee07f73dd44fc7face16b841c67c6f70 /kernel | |
| parent | 493d9e0d608339a32f568504d5fd411a261bb0af (diff) | |
bpf: disasm: add support for BPF_JMP|BPF_JA|BPF_X
Add support for indirect jump instruction.
Example output from bpftool:
0: (79) r3 = *(u64 *)(r1 +0)
1: (25) if r3 > 0x4 goto pc+666
2: (67) r3 <<= 3
3: (18) r1 = 0xffffbeefspameggs
5: (0f) r1 += r3
6: (79) r1 = *(u64 *)(r1 +0)
7: (0d) gotox r1
Signed-off-by: Anton Protopopov <a.s.protopopov@gmail.com>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20251105090410.1250500-10-a.s.protopopov@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/bpf/disasm.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/kernel/bpf/disasm.c b/kernel/bpf/disasm.c index 20883c6b1546..f8a3c7eb451e 100644 --- a/kernel/bpf/disasm.c +++ b/kernel/bpf/disasm.c @@ -358,6 +358,9 @@ void print_bpf_insn(const struct bpf_insn_cbs *cbs, } else if (insn->code == (BPF_JMP | BPF_JA)) { verbose(cbs->private_data, "(%02x) goto pc%+d\n", insn->code, insn->off); + } else if (insn->code == (BPF_JMP | BPF_JA | BPF_X)) { + verbose(cbs->private_data, "(%02x) gotox r%d\n", + insn->code, insn->dst_reg); } else if (insn->code == (BPF_JMP | BPF_JCOND) && insn->src_reg == BPF_MAY_GOTO) { verbose(cbs->private_data, "(%02x) may_goto pc%+d\n", |