annotate doc/Roadmap @ 559:fba5efca2293

gsm-fw/L1/dsp/leadapi.h: #include fix
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Mon, 04 Aug 2014 17:59:41 +0000
parents 6500e1817d9b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
462
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
1 The ultimate goal of the FreeCalypso project is to produce a GSM firmware
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
2 version that:
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
3
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
4 a) runs on the Calypso targets of interest to us: not only the FIC/Openmoko
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
5 GTA0x GSM modem, but also some complete dumbphones like Mot C139 and/or
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
6 Pirelli DP-L10;
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
7
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
8 b) operates each target device it runs on in a way that is practically usable:
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
9 to me (lead developer Space Falcon) practical usability means providing a
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
10 standard AT command interface on modems like GTA0x and operating as a self-
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
11 contained standard cellphone with a UI on complete "dumbphone" targets;
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
12
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
13 c) is rebuildable from source in a way that would allow us to exercise the
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
14 traditional Four Freedoms of free software as defined by the FSF.
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
15
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
16 Our starting point is TI's Leonardo reference firmware version from Sotovik, a
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
17 mixture of source and linkable binary object modules. It can be built into a
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
18 complete and functional firmware image with TI's TMS470 compiler+linker+etc
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
19 toolchain, and can run on two hardware targets:
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
20
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
21 a) TI's Leonardo development board for the Calypso/Iota/Rita chipset -
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
22 legendary unobtainium hardware;
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
23
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
24 b) FIC/Openmoko GTA0x GSM modem - while this device is *not* what I wish to use
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
25 with the "end user" hat on, it is an available and working hw platform for
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
26 development.
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
27
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
28 This Leonardo starting point does kinda-sorta satisfy the "rebuildable from
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
29 source" requirement, as I was able to port it from the Leonardo board to the
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
30 GTA0x modem, but it is still quite far from what the FreeCalypso project
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
31 ultimately seeks to achieve.
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
32
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
33 What I, the lead developer, ultimately seek is not an AT-controlled modem
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
34 embedded in a "Linux" smartphone, but a complete and standalone "dumbphone",
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
35 with the UI driven by the Calypso. Transforming our starting and working
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
36 reference version from something that runs on the GTA0x modem and presents an
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
37 AT command interface into something that can run on a complete "dumbphone" and
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
38 present a self-contained UI can be done in several possible ways:
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
39
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
40 1. One could proceed further with the same approach that was used to produce
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
41 leo2moko: keep making small incremental changes to the Leonardo semi-src,
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
42 while keeping most of the binary object blobs intact at least initially, and
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
43 sticking with the original proprietary TMS470 compiler toolchain (running
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
44 under wine, as it's a bunch of M$ Windows binaries) throughout the journey.
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
45
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
46 Advantage: no massive "forklift" step required at the very beginning of the
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
47 journey, one can do small incremental steps instead. One possible roadmap
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
48 with this approach might be (just thinking out loud here) to start with
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
49 finding a way to redirect the AT command channel to something wrapped inside
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
50 RVTMUX, then port the fw to run on a target like Pirelli DP-L10, still
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
51 controlled via AT commands but passed via RVTMUX, and then try to add the
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
52 "dumbphone" UI layers. Some of the binary object blobs would certainly need
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
53 to be "cracked" and modified in this process, most sensibly by replacing
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
54 each blob in need of modification with a reconstructed source piece, but
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
55 this work would be done incrementally, rather than in a massive "forklift"
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
56 step upfront.
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
57
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
58 Disadvantage: this approach requires sticking with the original proprietary
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
59 compiler toolchain throughout at least most of the journey, which means
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
60 keeping the Weendoze poison that toolchain comes with. This aspect was
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
61 enough to turn me personally away from this approach.
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
62
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
63 2. One could move away from the proprietary compiler toolchain and replace it
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
64 with gcc, while still retaining those parts of the Leonardo firmware for
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
65 which we only have linkable binary objects but no C source, by teaching the
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
66 GNU toolchain (gcc+binutils) to emulate the TMS470 compiler's ABI: COFF
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
67 objects, a very different way of doing ARM/Thumb interworking, and a host of
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
68 other differences from how the GNU toolchain for ARM normally does things.
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
69 (I've done similar work on GCC and GNU Binutils in the past; let us not
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
70 forget that GNU started out by emulating various inter-component interfaces,
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
71 including ABIs, of various proprietary Unix versions.)
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
72
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
73 The advantage of this approach should be obvious. While in the long run we
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
74 would certainly like to get rid of all binary object blobs and replace them
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
75 with reconstructed source pieces, life would be much easier if we could do
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
76 this work incrementally, one blob at a time in a regression-tested working
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
77 fw version, rather than all upfront.
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
78
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
79 Disadvantage: teaching gcc and binutils to emulate TI's TMS470 ABI well
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
80 enough to where one could compile some sources with gcc, link the resulting
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
81 .o's with TI's blobs and get a working fw image at the end would be no easy
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
82 matter. In fact, it would be a massive amount of work, and considering that
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
83 this work would serve absolutely no purpose but to allow linking with some
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
84 proprietary binary blobs, finding the justification for the effort would be
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
85 difficult.
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
86
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
87 3. The approach I am currently following is the most ambitious one: start by
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
88 deblobbing the firmware, i.e., replacing all binary object blobs with
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
89 reconstructed source pieces, and then simply compile the all-C source with
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
90 the GNU toolchain for ARM7 in its default ABI.
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
91
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
92 Advantage: having the firmware in the form of full C source that builds with
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
93 a free compiler (a compiler that is itself bona fide Free Software) is
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
94 obviously the ultimate best. No blobs means no need to waste creative energy
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
95 on emulating proprietary compiler ABIs.
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
96
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
97 Disadvantage: all the hardest work is upfront, and needs to be done in a
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
98 "forklift" manner.
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
99
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
100 It should be obvious that incrementality, or division into manageable, bite-
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
101 sized pieces, is an essential requirement for successful execution of any large
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
102 scale project, and FreeCalypso is no different. Because our chosen approach
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
103 unfortunately does not allow us to make small incremental modifications to a
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
104 fully functional fw version, I currently achieve the needed incrementality in a
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
105 different way: by starting out with a firmware "skeleton" that compiles into an
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
106 image and runs on the hardware, but does nothing useful yet, and then slowly
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
107 adding chunks of "meat" to this skeleton in incremental steps aiming in the
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
108 direction of the complete & working fw version that is our reference. As I add
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
109 each "chunk of meat" to our gcc-built gsm-fw, I test it on the hardware and
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
110 compare its operation against the leo2moko reference version - that is our form
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
111 of pseudo-regression testing.
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
112
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
113 Where the missing source bits come from
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
114 =======================================
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
115
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
116 How can we replace a binary object blob with a corresponding source piece if we
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
117 lack the original source? In two ways:
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
118
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
119 1. In many cases we can lift the corresponding source piece from another TI
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
120 source leak, e.g., the LoCosto one. Calypso and LoCosto chipsets are
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
121 different, so code specific to LoCosto hardware won't run on Calypso targets,
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
122 but much of the code is chipset-independent. The LoCosto source leak is
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
123 important because it contains real C source for many of the chipset-
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
124 independent components for which our Leonardo reference version has only
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
125 binary blobs.
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
126
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
127 2. When no original or suitable substitute source can be found anywhere, we
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
128 have to bite the bullet, pass the blob through a suitable disassembler (I
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
129 wrote one that is specifically taylored for reversing code built with the
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
130 TMS470 compiler), and then write a piece of new C code that replicates the
6500e1817d9b doc/Roadmap: written
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
131 logic found in the disassembled blob.