From fca59bea770346cf1c1f9b0e00cb48a61b44a8f3 Mon Sep 17 00:00:00 2001 From: Harald Welte Date: Sun, 25 Oct 2015 21:00:20 +0100 Subject: import of old now defunct presentation slides svn repo --- 2009/gnufiish-iii-tw2009/gnufiish-fossin.mgp | 541 +++++++++++++++++++++ .../x800_application_processor.jpg | Bin 0 -> 133493 bytes .../x800_backside_nobat_nocover.jpg | Bin 0 -> 76428 bytes .../gnufiish-iii-tw2009/x800_backside_with_lcm.jpg | Bin 0 -> 62712 bytes 2009/gnufiish-iii-tw2009/x800_dbgconn_closeup.jpg | Bin 0 -> 91400 bytes 2009/gnufiish-iii-tw2009/x800_debcon_pcb.jpg | Bin 0 -> 86510 bytes 2009/gnufiish-iii-tw2009/x800_factorytest.jpg | Bin 0 -> 39570 bytes 2009/gnufiish-iii-tw2009/x800_hsdpa_modem.jpg | Bin 0 -> 127029 bytes 2009/gnufiish-iii-tw2009/x800_jtagfinder.jpg | Bin 0 -> 43885 bytes .../gnufiish-iii-tw2009/x800_jtagfinder_probes.jpg | Bin 0 -> 63122 bytes .../x800_mainboard_with_shielding.jpg | Bin 0 -> 78293 bytes 2009/gnufiish-iii-tw2009/x800_opening_the_case.jpg | Bin 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2009/gnufiish-iii-tw2009/x800_usbdownload.jpg (limited to '2009/gnufiish-iii-tw2009') diff --git a/2009/gnufiish-iii-tw2009/gnufiish-fossin.mgp b/2009/gnufiish-iii-tw2009/gnufiish-fossin.mgp new file mode 100644 index 0000000..bb57e45 --- /dev/null +++ b/2009/gnufiish-iii-tw2009/gnufiish-fossin.mgp @@ -0,0 +1,541 @@ +%include "default.mgp" +%default 1 bgrad +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +%nodefault +%back "blue" + +%center +%size 7 + +Reverse Engineering +and +Porting Linux +to a +Windows Mobile PDA Phone + +%center +%size 4 +by + +Harald Welte + + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Introduction + +Who is speaking to you? + an independent Free Software developer, consultant and trainer + 13 years experience using/deploying and developing for Linux on server and workstation + 10 years professional experience doing Linux system + kernel level development + strong focus on network security and embedded + expert in Free and Open Source Software (FOSS) copyright and licensing + digital board-level hardware design, esp. embedded systems + active developer and contributor to many FOSS projects + thus, a techie, who will therefore not have fancy animated slides ;) + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Introduction + + +My involvement in Linux on mobile phones + 2003/2004: gpl-violations.org / Motorola A780 + 2004: Started OpenEZX for A780 (now E680, A1200, E6, ...) + 06/2006-11/2007: Lead System Architect at Openmoko, Inc. + 10/2008: Started the 'gnufiish' project + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Introduction + + +Linux on mobile phones + is hardly something new + Vendors have been doing this since 2003, e.g. + Motorola EZX + (A760, A768, A780, E680, A1200, E6, ...) + Motorola MAGX + (ROKR2v8, ...) + lots of unknown Chinese vendors (E28, Haier, ..) + however, no 'really open' devices + proprietary UI libraries + proprietary kernel extensions + often no full source code + cryptographically locked down + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Openmoko + + +Linux on mobile phones + Openmoko is many things + the hardware + GTA01 (Neo 1973) + GTA02 (Neo FreeRunner) + the various UI's + One GTK+ based) + One is a mixture of Qtopia, GTK+ and e17 + One is FSO + e17 based + the distribution (based on Openembedded) + the company (Openmoko, Inc.) + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Openmoko + + +Why I'm not working on/for/with Openmoko hardware? + + Not true, I still contribute to Openmoko :) + Linux kernel port is quite complete and stable + Hardware has its limits + GPRS-only (no EDGE, UMTS, HSDPA) + quite big and heavy + no option for keyboard + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Community based projects + + +Linux mobile phone community ports + + The vendor ships WM or other OS, community replaces it + xda-developers.com community + mostly focused on HTC devices + way too little developers fro too many devices + hardware product cycles getting shorter / faster + many new devices based on completely undocumented chipsets + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Community based projects + + +Linux mobile phone community ports + + More smaller / fragmented projects + Most based on the fact that somebody bought the device and started osme hacking + Most are stuck + either in a quite early stage (kernel boots, not many drivers) + or advanced but hardware already end-of-life + Conclusion: + We need a new project with more prospect for success + Needs to be stable and full-feature while hardware still available + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Community based projects + + +Linux mobile phone community ports + + What if you want to start from scratch? + choose hardware that is as documented as possible + choose hardware where most peripherals have drivers + choose hardware that has good support in mainline Linux + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Community based projects + + +How to find such a Linux-friendly device? + + Look at hardware details of available devices + Use Google to find out what hardware they use + Use FCC database to get PCB photographs + Look at WM firmware images (registry/...) + At some point you buy one and take it apart + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Linux-friendly hardware + + +The E-TEN glofiish device family + + various devices with different parameters + screen full-VGA or QVGA + EDGE-only, UMTS or HSDPA + keyboard or no keyboard + GPS or no GPS + Wifi or no Wifi + application processor is always the same (S3C2442) + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Linux-friendly hardware + +I went through this process + I found the E-TEN glofiish devices + They are very similar to Openmoko + Samsung S3C2442 SoC MCP with NAND+SDRAM + TD028TTEC1 full-VGA LCM + Other hardware parts reasonably supported/known + Marvell 8686/libertas WiFi (SPI attached) + SiRF GPS (UART attached) + CSR Bluetooth (UART attached) + Only some unknown parts + CPLD for power management and kbd matrix + Ericsson GSM Modem (AT commandset documented!) + Cameras (I don't really care) + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Project gnufiish + + +Project 'gnufiish' + Port Linux to the E-TEN glofiish devices + Initially to the M800 and X800 + Almost all glofiish have very similar hardware + Openmoko merges all my patches in their kernel! + Official inclusion to Openmoko distribution + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Project gnufiish + +gnufiish Status + Kernel (2.6.24/2.6.27) booted on _first attempt_ + Working + I2C host controller + I2C communication to CPLD and FM Radio + USB Device mode (Ethernet gadget) + Touchscreen input + LCM Framebuffer + LCM Backlight control + GPS and Bluetooth power control + GPIO buttons + In the works + Audio Codec driver (50% done) + GSM Modem (SPI) driver (80% done) + M800 Keyboard + Capsense driver (25% done) + SPI glue to libertas WiFi driver (70% done) + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +HOWTO + +How was this done? + Various reverse engineering techniques + Take actual board apart, note major components + Use HaRET (hardwar reverse engineering tool) + Find + use JTAG testpads + Find + use serial console + Disassemble WinMobile drivers + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Take hardware apart + +Opening the case and void your warranty +%image "x800_backside_nobat_nocover.jpg" +Note the convenient test pads beneath the battery + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Take hardware apart + +Opening the case +%image "x800_opening_the_case.jpg" 800x600 +If you have a bit of experience in taking apart devices, you can do that without any damage... + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Take hardware apart + +The Mainboard with all its shielding covers +%image "x800_mainboard_with_shielding.jpg" 800x600 +Obvoiusly, the shielding needs to go + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Take hardware apart + +The application processor section +%image "x800_application_processor.jpg" + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Take hardware apart + +The HSDPA modem section +%image "x800_hsdpa_modem.jpg" + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Take hardware apart + +The backside +%image "x800_backside_with_lcm.jpg" + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +JTAG pins + + Find + use JTAG testpads + JTAG is basically a long shift register + Input, Output, Clock (TDI, TDO, TCK) + Therefore, you can try to shift data in and check if/where it comes out + Automatized JTAG search by project "jtagfinder" by Hunz (German CCC member) + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +JTAG pins + +Find + use JTAG testpads +%image "x800_dbgconn_closeup.jpg" + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +JTAG pins + +Find + use JTAG testpads +%image "x800_debcon_pcb.jpg" + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +JTAG pins + +Find + use JTAG testpads +%image "x800_jtagfinder_probes.jpg" + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +JTAG pins + +Find + use JTAG testpads +%image "x800_jtagfinder.jpg" + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +JTAG pins + + +Found JTAG pins + Chain 1 + Samsung S3C2442 Application Processor + Has standard ARM JTAG ICE + Chain 2 + CPLD programming interface + Remaining work + find the nTRST and nSRST pins + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Serial console + + +How to find the serial console + Just run some code that you think writes to it + Use a Scope to find typical patterns of a serial port + I haven't actually done (or needed) this on the glofiish yet, but on many other devices + RxD pin is harder to find, just trial+error usually works as soon as you have some interactive prompt that echo's the characters you write + Don't forget to add level shifter from 3.3/5V to RS232 levels + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +What's HaRET + +What is HaRET + a Windows executable program for any WinCE based OS + offers a control interface on a TCP port + connect to it using haretconsole (python script) on Linux PC + supports a number of popular ARM based SoC (PXA, S3C, MSM) + features include + GPIO state and tracing + MMIO read/write + virtual/physical memory mapping + IRQ tracing (by redirecting IRQ vectors) + load Linux into ram and boot it from within WinCE + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Using HaRET + +Using HaRET + run the program on the target device + connect to it using haretconsole over USB-Ethernet + read GPIO configuration + Create GPIO funciton map based on SoC data sheet + watch for GPIO changes + remove the signal from the noise + exclude unitneresting and frequently changing GPIOs + watch for GPIO changes while performing certain events + press every button and check + start/stop peripherals + insert/eject SD card + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Using HaRET + + +Using HARET + watch for IRQ changes/events + e.g. you see DMA3 interrupts while talking to the GSM + read MMIO config of DMA controller to determine user: SPI + read SPI controller configuration + DMA controller configuration + find RAM address of data buffers read/written by DMA + haretconsole writes logfiles + you can start to annotate the logfiles + of course, all of this could be done using JTAG, too. + but with HaRET, you mostly don't need it!!! + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Disassembling WinCE drivers + + +Disassmbling WinCE drivers + is the obvious thing to do, right? + is actually not all that easy, since + WinCE doesn't allow you to read the DLLs + not via ActiveSync neither WinCE filesystem API's + Apparently, they are pre-linked and not real files anymore + luckily, there are tools in the 'ROM cooking' scene + hundreds of different tools, almost all need Windows PC + therefore, not useful to me + conclusion: Need to understand the ROM image format + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Disassembling WinCE ROM files + +Disassembling WinCE ROM files + 'datextract' to extract different portions like OS image + 'x520.pl' to remove spare NAND OOB sectors from image and get a file + split resulting image in bootsplash, cabarchive and disk image + 'xx1.pl' to split cabarchive into CAB files + 'partextract' to split disk image in partitions + 'SRPX2XIP.exe' (wine) to decompress XPRS compressed partition0+1 + 'dumpxip.pl' to dump/recreate files in partition0 and 1 + 'ImgfsToDump.exe' to dump/recreate files in partition2 (imagefs) + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Disassembling WinCE Drivers + + +Disassembling WinCE Drivers + Now we finally have the re-created DLL's with the drivers + Use your favourite debugger/disassembler to take them apart + I'm a big fan of IDA (Interactive Disassembler) + The only proprietary software that I license+use in 15 years + There's actually a Linux x86 version + Was even using it with qemu on my Powerbook some years back + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Disassembling WinCE Drivers + +Important drivers + pwrbtn.dll: the power button ?!? + spkphn.dll: high-level device management + i2c.dll: S3C24xx I2C controller driver + spi.dll: The GSM Modem SPI driver + Sergsm.dll: S3C24xx UART driver, NOT for GSM + SerialCSR.dll: CSR Bluetooth driver + fm_si4700.dll: The FM Radio (I2C) + battdrvr.dll: Battery device (I2C) + keypad.dll: Keypad+Keyboard+Capsense (I2C) + GSPI8686.dll: Marvell WiFi driver (SPI) + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Disassembling WinCE Drivers + +Disassembling WinCE drivers + Is typically hard, they're completely stripped + Windows drivers are very data-driven, not many symbols/functions + However, debug statements left by developers are always helpful + After some time you get used to it + You know your hardware and the IO register bases + take it from there, look at register configuration + What I've learned about WinCE driver development + ... would be an entirely separate talk + MSDN luckily has full API documentation + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +WinCE Registry + + +WinCE has a registry, too + I never really understood what this registry is all about, but it doesn't matter ;) + You can use 'synce-registry' to dump it to Linux + Contains important information about + how drivers are interconnected + various configuration parameters of drivers + + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Links + + + + http://wiki.openezx.org/Glofiish_X800 + http://git.openezx.org/?p=gnufiish.git + http://eten-users.eu/ + http://wiki.xda-developers.com/ + + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%page +Reverse Engineering and Porting Linux to a WM PDA Phone +Thanks + + +Thanks to + Openmoko, Inc. for trying to create more open phones + Hunz for his jtagfinder + xda-developers.org for all their work on WinCE tools + eten-users.eu for the various ETEN related ROM cooking projects + Willem Jan Hengeveld (itsme) for his M700 ROM tools + An undisclosed Indian Company for showing commercial interest in this project + Samsung, for having 100% open source driver for their SoC's + Ericsson, for publishing the full AT command set for their modems + diff --git a/2009/gnufiish-iii-tw2009/x800_application_processor.jpg b/2009/gnufiish-iii-tw2009/x800_application_processor.jpg new file mode 100644 index 0000000..2d5fafb Binary files /dev/null and b/2009/gnufiish-iii-tw2009/x800_application_processor.jpg differ diff --git a/2009/gnufiish-iii-tw2009/x800_backside_nobat_nocover.jpg 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