This reverts commit 97ee4d20ee67eb462581a7af01442de6586e390b.
Following change is adding more complexity to bpf_get_func_ip
helper for kprobe_multi programs, which can't be inlined easily.
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
kernel/bpf/verifier.c | 21 +--------------------
kernel/trace/bpf_trace.c | 1 -
2 files changed, 1 insertion(+), 21 deletions(-)
diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c
index 0287176bfe9a..cf92f9c01556 100644
--- a/kernel/bpf/verifier.c
+++ b/kernel/bpf/verifier.c
@@ -13678,7 +13678,7 @@ static int do_misc_fixups(struct bpf_verifier_env *env)
continue;
}
- /* Implement tracing bpf_get_func_ip inline. */
+ /* Implement bpf_get_func_ip inline. */
if (prog_type == BPF_PROG_TYPE_TRACING &&
insn->imm == BPF_FUNC_get_func_ip) {
/* Load IP address from ctx - 16 */
@@ -13693,25 +13693,6 @@ static int do_misc_fixups(struct bpf_verifier_env *env)
continue;
}
-#ifdef CONFIG_X86
- /* Implement kprobe_multi bpf_get_func_ip inline. */
- if (prog_type == BPF_PROG_TYPE_KPROBE &&
- eatype == BPF_TRACE_KPROBE_MULTI &&
- insn->imm == BPF_FUNC_get_func_ip) {
- /* Load IP address from ctx (struct pt_regs) ip */
- insn_buf[0] = BPF_LDX_MEM(BPF_DW, BPF_REG_0, BPF_REG_1,
- offsetof(struct pt_regs, ip));
-
- new_prog = bpf_patch_insn_data(env, i + delta, insn_buf, 1);
- if (!new_prog)
- return -ENOMEM;
-
- env->prog = prog = new_prog;
- insn = new_prog->insnsi + i + delta;
- continue;
- }
-#endif
-
patch_call_imm:
fn = env->ops->get_func_proto(insn->imm, env->prog);
/* all functions that have prototype and verifier allowed
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 9a7b6be655e4..52c2998e1dc3 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -1042,7 +1042,6 @@ static const struct bpf_func_proto bpf_get_func_ip_proto_kprobe = {
BPF_CALL_1(bpf_get_func_ip_kprobe_multi, struct pt_regs *, regs)
{
- /* This helper call is inlined by verifier on x86. */
return instruction_pointer(regs);
}
--
2.35.1
