b2a: a binary2ascii converter for LKET

It is used to convert the binary trace data generated by systemtap
with LKET into readable data in ascii format.

It uses the pre-cpu binary trace data files as inputs, and generates
an output file named "lket.out". You can use "stap -b -M" with LKET 
to get those pre-cpu files (stpd_cpu*) before using it.

How to build:
	gcc -O2 -o b2a lket_b2a.c

How to use:
	./b2a stpd_cpuX [stpd_cpuY ...]
	or
	./b2a stpd_cpu*

The following is a typical output of b2a:

LKET Magic:	0xAEFCDB6B
InitHdrLen:	4
Version Major:	0
Version Minor:	1
Big endian:	YES
Bits width:	2
0.0 App1[PID:24456 PPID:24371 TID:24456] CPU:3 HOOKGRP:2 HOOKID:1 HOOKDATA:0 swapper
0.3 App1[PID:24456 PPID:24371 TID:24456] CPU:3 HOOKGRP:2 HOOKID:1 HOOKDATA:1 init
...
0.723810 App9[PID:3345 PPID:1 TID:3345] CPU:7 HOOKGRP:1 HOOKID:1 HOOKDATA:sys_gettimeofday
0.723814 App9[PID:3345 PPID:1 TID:3345] CPU:7 HOOKGRP:1 HOOKID:2 HOOKDATA:sys_gettimeofday
0.723820 App9[PID:3345 PPID:1 TID:3345] CPU:7 HOOKGRP:1 HOOKID:1 HOOKDATA:sys_poll
0.723837 App9[PID:3345 PPID:1 TID:3345] CPU:7 HOOKGRP:4 HOOKID:2 HOOKDATA:3345 c0000000004418c4 c000000007400040 c0000000004418b4 c0000000004433cc c0000000000cce80 c00000000002a408 80d0b2154c 80d2da7b40
...
36.365564 App35[PID:24491 PPID:18767 TID:24491] CPU:3 HOOKGRP:6 HOOKID:1 HOOKDATA:268585192 0
36.365571 App35[PID:24491 PPID:18767 TID:24491] CPU:3 HOOKGRP:1 HOOKID:1 HOOKDATA:compat_sys_execve
36.365579 App35[PID:24491 PPID:18767 TID:24491] CPU:3 HOOKGRP:2 HOOKID:2 HOOKDATA:/bin/ls
...
37.495705 App35[PID:24491 PPID:18767 TID:24491] CPU:4 HOOKGRP:1 HOOKID:1 HOOKDATA:sys_getdents64
37.495730 App35[PID:24491 PPID:18767 TID:24491] CPU:4 HOOKGRP:3 HOOKID:2 HOOKDATA:anticipatory 8 0
37.495738 App35[PID:24491 PPID:18767 TID:24491] CPU:4 HOOKGRP:3 HOOKID:1 HOOKDATA:anticipatory -1 -1
37.495769 App35[PID:24491 PPID:18767 TID:24491] CPU:4 HOOKGRP:5 HOOKID:1 HOOKDATA:8 0 2 c0000000002fd8dc c000000002a52d48 c0000000001f160c 
37.495775 App35[PID:24491 PPID:18767 TID:24491] CPU:4 HOOKGRP:5 HOOKID:1 HOOKDATA:8 0 2
37.495784 App35[PID:24491 PPID:18767 TID:24491] CPU:4 HOOKGRP:5 HOOKID:2 HOOKDATA:2 1 2 -4611686018331225216 4096 45812
...
37.516707 App32[PID:18763 PPID:3079 TID:18763] CPU:5 HOOKGRP:7 HOOKID:2 HOOKDATA:eth0 106 2048 1880
...
37.517938 App4[PID:0 PPID:1 TID:0] CPU:1 HOOKGRP:7 HOOKID:1 HOOKDATA:eth0 46 2048 728
...