kernel/tools/testing/selftests/bpf/disasm_helpers.c, branch linux-rolling-stableHosts the 0x221E linux distro kernel.https://universe.0xinfinity.dev/distro/kernel/atom?h=linux-rolling-stable2024-07-29T22:05:06Zselftests/bpf: print correct offset for pseudo calls in disasm_insn()2024-07-29T22:05:06ZEduard Zingermaneddyz87@gmail.com2024-07-22T23:38:39Zurn:sha1:203e6aba7692bca18fd97251b1354da0f5e2ba30
Adjust disasm_helpers.c:disasm_insn() to account for the following
part of the verifier.c:jit_subprogs:
for (i = 0, insn = prog->insnsi; i < prog->len; i++, insn++) {
/* ... */
if (!bpf_pseudo_call(insn))
continue;
insn->off = env->insn_aux_data[i].call_imm;
subprog = find_subprog(env, i + insn->off + 1);
insn->imm = subprog;
}
Where verifier moves offset of the subprogram to the insn->off field.
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20240722233844.1406874-6-eddyz87@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
selftests/bpf: extract utility function for BPF disassembly2024-07-29T22:05:05ZEduard Zingermaneddyz87@gmail.com2024-07-22T23:38:38Zurn:sha1:424ebaa3678b0d7f653dffb08eae90424740e0f4
struct bpf_insn *disasm_insn(struct bpf_insn *insn, char *buf, size_t buf_sz);
Disassembles instruction 'insn' to a text buffer 'buf'.
Removes insn->code hex prefix added by kernel disassembly routine.
Returns a pointer to the next instruction
(increments insn by either 1 or 2).
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/r/20240722233844.1406874-5-eddyz87@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>