add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/riscv/net/bpf_jit.h
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@@ -69,6 +69,7 @@
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 	struct bpf_prog *prog;
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 	u16 *insns;		/* RV insns */
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 	int ninsns;
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+	int prologue_len;
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 	int epilogue_offset;
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 	int *offset;		/* BPF to RV */
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 	unsigned long flags;
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@@ -214,8 +215,8 @@
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 	int from, to;
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 	off++; /* BPF branch is from PC+1, RV is from PC */
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-	from = (insn > 0) ? ctx->offset[insn - 1] : 0;
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-	to = (insn + off > 0) ? ctx->offset[insn + off - 1] : 0;
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+	from = (insn > 0) ? ctx->offset[insn - 1] : ctx->prologue_len;
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+	to = (insn + off > 0) ? ctx->offset[insn + off - 1] : ctx->prologue_len;
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 	return ninsns_rvoff(to - from);
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 }
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