diff options
Diffstat (limited to 'arch/arm64/net/bpf_jit_comp.c')
| -rw-r--r-- | arch/arm64/net/bpf_jit_comp.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/arch/arm64/net/bpf_jit_comp.c b/arch/arm64/net/bpf_jit_comp.c index afd05b41ea9e..74dd29816f36 100644 --- a/arch/arm64/net/bpf_jit_comp.c +++ b/arch/arm64/net/bpf_jit_comp.c @@ -1452,6 +1452,10 @@ emit_bswap_uxt: emit(A64_ASR(is64, dst, dst, imm), ctx); break; + /* JUMP reg */ + case BPF_JMP | BPF_JA | BPF_X: + emit(A64_BR(dst), ctx); + break; /* JUMP off */ case BPF_JMP | BPF_JA: case BPF_JMP32 | BPF_JA: @@ -2231,6 +2235,13 @@ skip_init_ctx: for (i = 0; i <= prog->len; i++) ctx.offset[i] *= AARCH64_INSN_SIZE; bpf_prog_fill_jited_linfo(prog, ctx.offset + 1); + /* + * The bpf_prog_update_insn_ptrs function expects offsets to + * point to the first byte of the jitted instruction (unlike + * the bpf_prog_fill_jited_linfo above, which, for historical + * reasons, expects to point to the next instruction) + */ + bpf_prog_update_insn_ptrs(prog, ctx.offset, ctx.ro_image); out_off: if (!ro_header && priv_stack_ptr) { free_percpu(priv_stack_ptr); @@ -2923,8 +2934,9 @@ static int gen_branch_or_nop(enum aarch64_insn_branch_type type, void *ip, * The dummy_tramp is used to prevent another CPU from jumping to unknown * locations during the patching process, making the patching process easier. */ -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; u32 old_insn; @@ -2968,14 +2980,13 @@ int bpf_arch_text_poke(void *ip, enum bpf_text_poke_type poke_type, !poking_bpf_entry)) return -EINVAL; - if (poke_type == BPF_MOD_CALL) - branch_type = AARCH64_INSN_BRANCH_LINK; - else - branch_type = AARCH64_INSN_BRANCH_NOLINK; - + branch_type = old_t == BPF_MOD_CALL ? AARCH64_INSN_BRANCH_LINK : + AARCH64_INSN_BRANCH_NOLINK; if (gen_branch_or_nop(branch_type, ip, old_addr, plt, &old_insn) < 0) return -EFAULT; + branch_type = new_t == BPF_MOD_CALL ? AARCH64_INSN_BRANCH_LINK : + AARCH64_INSN_BRANCH_NOLINK; if (gen_branch_or_nop(branch_type, ip, new_addr, plt, &new_insn) < 0) return -EFAULT; |