}
}
+static uint8_t bpf_encode_jt_jf_offset(int off, int i)
+{
+ int delta = off - i - 1;
+
+ if (delta < 0 || delta > 255)
+ fprintf(stderr, "warning: insn #%d jumps to insn #%d, "
+ "which is out of range\n", i, off);
+ return (uint8_t) delta;
+}
+
static void bpf_reduce_jt_jumps(void)
{
int i;
for (i = 0; i < curr_instr; i++) {
if (labels_jt[i]) {
int off = bpf_find_insns_offset(labels_jt[i]);
- out[i].jt = (uint8_t) (off - i -1);
+ out[i].jt = bpf_encode_jt_jf_offset(off, i);
}
}
}
for (i = 0; i < curr_instr; i++) {
if (labels_jf[i]) {
int off = bpf_find_insns_offset(labels_jf[i]);
- out[i].jf = (uint8_t) (off - i - 1);
+ out[i].jf = bpf_encode_jt_jf_offset(off, i);
}
}
}