# Power PC AIF ECOFF file Format

Assembler code

```
.text:00002054
.text:00002054 # =============== S U B R O U T I N E =======================================
.text:00002054
.text:00002054
.text:00002054 bpf_tap:
.text:00002054
.text:00002054 .set sender_sp, -0x50
.text:00002054 .set var_C, -0xC
.text:00002054 .set var_8, -8
.text:00002054 .set var_4, -4
.text:00002054 .set sender_lr,  8
.text:00002054
.text:00002054                 stw       r31, var_4(r1)
.text:00002058                 lwz       r31, 4(r3)
.text:0000205C                 mr        r6, r5
.text:00002060                 mflr      r0
.text:00002064                 cmpwi     r31, 0
.text:00002068                 lwz       r3, 0x28(r31)
.text:0000206C                 stw       r0, sender_lr(r1)
.text:00002070                 stwu      r1, sender_sp(r1)
.text:00002074                 addi      r0, r3, 1
.text:00002078                 stw       r5, 0x50+var_C(r1)
.text:0000207C                 lwz       r3, 0x24(r31)
.text:00002080                 stw       r4, 0x50+var_8(r1)
.text:00002084                 beq       loc_20EC
.text:00002088                 stw       r0, 0x28(r31)
.text:0000208C
.text:0000208C loc_208C:                               # CODE XREF: bpf_tap+80↓j
.text:0000208C                 bl        bpf_filter
.text:00002090                 nop
.text:00002094                 mr.       r6, r3
.text:00002098                 mr        r3, r31
.text:0000209C                 lwz       r4, 0x50+var_8(r1)
.text:000020A0                 lwz       r5, 0x50+var_C(r1)
.text:000020A4                 lwz       r7, off_4178  # off_40B4
```


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