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ポインタ入門 i386 アセンブラ編

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January 03, 2025
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ポインタ入門 i386 アセンブラ編

C言語のポインタ経由の目盛り書き込みをi386のアセンブリ言語と比較します。

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7shi

January 03, 2025
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Transcript

  1. ポインタ入門 i386 アセンブラ編

  2. 00000000:00 00 00 00 00 00 00 00 00000008:00 00

    00 00 00 00 00 00 MOV BYTE PTR[0x00000001],0x12 MOV WORD PTR[0x00000004],0xFECA MOV DWORD PTR[0x0000000A],0xEFBEADDE

  3. 00000000:00 12 00 00 00 00 00 00 00000008:00 00

    00 00 00 00 00 00 MOV BYTE PTR[0x00000001],0x12 MOV WORD PTR[0x00000004],0xFECA MOV DWORD PTR[0x0000000A],0xEFBEADDE

  4. 00000000:00 12 00 00 CA FE 00 00 00000008:00 00

    00 00 00 00 00 00 MOV BYTE PTR[0x00000001],0x12 MOV WORD PTR[0x00000004],0xFECA MOV DWORD PTR[0x0000000A],0xEFBEADDE

  5. 00000000:00 12 00 00 CA FE 00 00 00000008:00 00

    DE AD BE EF 00 00 MOV BYTE PTR[0x00000001],0x12 MOV WORD PTR[0x00000004],0xFECA MOV DWORD PTR[0x0000000A],0xEFBEADDE

  6. 00000000:00 12 00 00 CA FE 00 00 00000008:00 00

    DE AD BE EF 00 00 MOV BYTE PTR[0x00000001],0x12 MOV WORD PTR[0x00000004],0xFECA MOV DWORD PTR[0x0000000A],0xEFBEADDE

  7. ポインタ入門 i386 C言語編

  8. 00000000:00 00 00 00 00 00 00 00 00000008:00 00

    00 00 00 00 00 00 *(char *)0x00000001 = 0x12; *(short *)0x00000004 = 0xFECA; *(long *)0x0000000A = 0xEFBEADDE;

  9. 00000000:00 12 00 00 00 00 00 00 00000008:00 00

    00 00 00 00 00 00 *(char *)0x00000001 = 0x12; *(short *)0x00000004 = 0xFECA; *(long *)0x0000000A = 0xEFBEADDE;

  10. 00000000:00 12 00 00 CA FE 00 00 00000008:00 00

    00 00 00 00 00 00 *(char *)0x00000001 = 0x12; *(short *)0x00000004 = 0xFECA; *(long *)0x0000000A = 0xEFBEADDE;

  11. 00000000:00 12 00 00 CA FE 00 00 00000008:00 00

    DE AD BE EF 00 00 *(char *)0x00000001 = 0x12; *(short *)0x00000004 = 0xFECA; *(long *)0x0000000A = 0xEFBEADDE;

  12. 00000000:00 12 00 00 CA FE 00 00 00000008:00 00

    DE AD BE EF 00 00 *(char *)0x00000001 = 0x12; *(short *)0x00000004 = 0xFECA; *(long *)0x0000000A = 0xEFBEADDE;