diff options
Diffstat (limited to 'arch/loongarch/net/bpf_jit.c')
| -rw-r--r-- | arch/loongarch/net/bpf_jit.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/arch/loongarch/net/bpf_jit.c b/arch/loongarch/net/bpf_jit.c index cbe53d0b7fb0..8dc58781b8eb 100644 --- a/arch/loongarch/net/bpf_jit.c +++ b/arch/loongarch/net/bpf_jit.c @@ -1284,11 +1284,12 @@ void *bpf_arch_text_copy(void *dst, void *src, size_t len) return ret ? ERR_PTR(-EINVAL) : dst; } -int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type poke_type, - void *old_addr, void *new_addr) +int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type old_t, + enum bpf_text_poke_type new_t, void *old_addr, + void *new_addr) { int ret; - bool is_call = (poke_type == BPF_MOD_CALL); + bool is_call; u32 old_insns[LOONGARCH_LONG_JUMP_NINSNS] = {[0 ... 4] = INSN_NOP}; u32 new_insns[LOONGARCH_LONG_JUMP_NINSNS] = {[0 ... 4] = INSN_NOP}; @@ -1298,6 +1299,7 @@ int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type poke_type, if (!is_bpf_text_address((unsigned long)ip)) return -ENOTSUPP; + is_call = old_t == BPF_MOD_CALL; ret = emit_jump_or_nops(old_addr, ip, old_insns, is_call); if (ret) return ret; @@ -1305,6 +1307,7 @@ int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type poke_type, if (memcmp(ip, old_insns, LOONGARCH_LONG_JUMP_NBYTES)) return -EFAULT; + is_call = new_t == BPF_MOD_CALL; ret = emit_jump_or_nops(new_addr, ip, new_insns, is_call); if (ret) return ret; @@ -1624,6 +1627,9 @@ static int __arch_prepare_bpf_trampoline(struct jit_ctx *ctx, struct bpf_tramp_i /* Direct jump skips 5 NOP instructions */ else if (is_bpf_text_address((unsigned long)orig_call)) orig_call += LOONGARCH_BPF_FENTRY_NBYTES; + /* Module tracing not supported - cause kernel lockups */ + else if (is_module_text_address((unsigned long)orig_call)) + return -ENOTSUPP; if (flags & BPF_TRAMP_F_CALL_ORIG) { move_addr(ctx, LOONGARCH_GPR_A0, (const u64)im); |