リセットとフリーズで解析する電子辞書リバエン記 / reverse-engineer-e-dictionaries-with-reset-and-freeze

Kernel/VM 探検隊 online part4 LT
小説版: https://www.zopfco.de/entry/reset_freeze_re

Transcript

1. Kernel/VM online part 4 LT @puhitaku
2. Takumi Sueda @puhitaku NICT 
 HOMMA Inc. 
 Twitter 

3. SHARP Brain SHARP Windows CE 
 CE exe (PE) 2011 TOSHIBA TMPA 9 10 CRAXBG (armv 5 tej) + 64 MiB DRAM Windows CE 2012 2020 NXP i.MX 2 83 (armv 5 tej) + 12 8 MiB DRAM Windows CE 2021 ??? SHARP Brain 3 https://jp.sharp/edictionary/products/pwsh 1 _overviiew.html
4. SHARP Brain 2019 2020 SHARP Brain PW-SH 1 Linux + i.MX 283 Raspberry Pi Brain Linux SD Brain Linux 4 https://jp.sharp/edictionary/products/pwsh 1 _overviiew.html
5. 2021 1 Brain
6. Brain https://jp.sharp/edictionary/topics/ 6
7. Brain https://brain-library.com/ 7
8. Brain OS 
 SoC i.MX 283 8
9. Brain 9
10. Brain 10
11. Brain 11
12. Brain SoC NXP i.MX 7 ULP i.MX 7 ULP = Cortex-A 7 + Cortex-M 4 12
13. Brain (Windows CE PE) OS 13
15. 
 objdump 0 Arm 15
16. 
 as ELF .text 16
17. 17
18. resource hog 18 

19. _start return 19
20. 20
21. 0x 00 0000 00 
 21
22. return 0 x 0 00000 0 0 22
23. U-Boot
24. U-Boot 1 . MMU 2 . MMU U-Boot U-Boot 24
25. U-Boot & OS API JTAG UART TX UART 
 I/O 25
26. U-Boot 
 
 1bit 26
27. U-Boot 1 MMU
28. U-Boot MMU MMU mrc SCTSR MMU mcr MMU 28 SCTSR
29. U-Boot MMU mrc 
 29
30. U-Boot MMU 30
31. U-Boot MMU mrc SCTSR return 31
32. U-Boot 2 U-Boot
33. U-Boot U-Boot U-Boot MMU 
 U-Boot 3 : 1 . Brain 2 . DRAM 1. 1. 3 . 2. 64 KiB (large page) 1. U-Boot 33
34. U-Boot 2 U-Boot 1
35. U-Boot U-Boot 1 35 Brain 1 MiB NOP mov pc, lr NOP = mov r0, r0
36. U-Boot U-Boot 1 36 1 5 MiB Brain 15 MiB 1 ( 4 Bytes) 1 5 MiB DRAM 128 MiB 11.7%
37. U-Boot 2 U-Boot 2 

38. U-Boot U-Boot 38 NOP MMU NOP 1 NOP 6 4 KiB NOP NOP ……… 2 1
39. U-Boot U-Boot 2 39 Virtual 
 Memory 1 5 MiB 1 MMU Physical 
 Memory MMU
40. U-Boot U-Boot 2 40 1 Physical 
 Memory 0 x 6000 000 0 0 x 6800 000 0 1 
 !"#$ %&'( !"#$ 1
41. U-Boot U-Boot 2 41 1 Physical 
 Memory 0 x 6 78000 0 0 DRAM 15 MiB 
 %&'( 0 x 6000 000 0 0 x 6800 000 0
42. U-Boot 2 U-Boot 3 

43. U-Boot U-Boot 43 2 
 MMU NOP NOP 6 4 KiB NOP 3 1 NOP NOP NOP NOP
44. U-Boot U-Boot 44 112 64 KiB NOP NOP 6 4 KiB 3 1 NOP NOP NOP NOP 112 …
45. U-Boot U-Boot 1 . ✅ U-Boot 2 . ✅ MMU 3 . ✅ MMU U-Boot 1 5 MiB 0x 7 0 0 0 0 0 u-boot.bin 
 0x 67 800000 U-Boot U-Boot 45
46. U-Boot
47. U-Boot i.MX 7 ULP con fi g 
 47
48. U-Boot 48
49. U-Boot U-Boot shell 49
50. Linux
51. Linux U-Boot Image printk UART Linux 51
52. Linux @pepepper_cpp Mailbox Unit Linux MU NXP upstream MU merge 52
53. Linux Linux Linux 53
55. μITRON RTOS I/O I/O 55
56. & Speakerdeck 56