Commit 9ddd2b8d authored by Hengqi Chen's avatar Hengqi Chen Committed by Huacai Chen

LoongArch: BPF: Support 32-bit offset jmp instructions

Add support for 32-bit offset jmp instruction. Currently, we use b
instruction which supports range within ±128MB for such jumps. This
should be large enough for BPF progs.
Signed-off-by: default avatarHengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 4ebf9216
......@@ -848,7 +848,11 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx, bool ext
/* PC += off */
case BPF_JMP | BPF_JA:
jmp_offset = bpf2la_offset(i, off, ctx);
case BPF_JMP32 | BPF_JA:
if (BPF_CLASS(code) == BPF_JMP)
jmp_offset = bpf2la_offset(i, off, ctx);
else
jmp_offset = bpf2la_offset(i, imm, ctx);
if (emit_uncond_jmp(ctx, jmp_offset) < 0)
goto toofar;
break;
......
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