Page Heap Implementation
It is a well-known fact that page heap is implemented by placing allocations at the end of pages with the next non-accessible page to catch buffer overruns leading to heap corruption (Volume 1, page 257). The best way to see it is to use !address command that dumps all such allocations:
0:004> !gflag Current NtGlobalFlag contents: 0x02000000 hpa - Place heap allocations at ends of pages
0:004> !address [...] 20b10000 20b11000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b11000 20b12000 1000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b12000 20b13000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b13000 20b14000 1000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b14000 20b15000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b15000 20b1a000 5000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b1a000 20b1b000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b1b000 20b1c000 1000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b1c000 20b1d000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b1d000 20b1e000 1000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b1e000 20b1f000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b1f000 20b20000 1000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] + 20b20000 20b21000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b21000 20b26000 5000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b26000 20b27000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b27000 20b28000 1000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b28000 20b29000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b29000 20b2a000 1000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b2a000 20b2b000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b2b000 20b2f000 4000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b2f000 20b30000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b30000 20b3f000 f000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b3f000 20b40000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b40000 20b41000 1000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b41000 20b42000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b42000 20b45000 3000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b45000 20b46000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b46000 20b4b000 5000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b4b000 20b4c000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b4c000 20b4d000 1000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b4d000 20b4e000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b4e000 20b4f000 1000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b4f000 20b50000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b50000 20b51000 1000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b51000 20b52000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b52000 20b57000 5000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b57000 20b58000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b58000 20b5d000 5000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b5d000 20b5e000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b5e000 20b5f000 1000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b5f000 20b60000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b60000 20b61000 1000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b61000 20b62000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b62000 20b6b000 9000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b6b000 20b6f000 4000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b6f000 20b71000 2000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b71000 20b72000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b72000 20b73000 1000 MEM_PRIVATE MEM_RESERVE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] 20b73000 20b74000 1000 MEM_PRIVATE MEM_COMMIT PAGE_READWRITE PageHeap [PageHeap: 1f241000; NormalHeap: 1f410000] [...]
0:004> dc 20b26000 20b27000 20b26000 00000000 00000000 00000000 00000000 ................ 20b26010 00000000 00000000 00000000 00000000 ................ 20b26020 00000000 00000000 00000000 00000000 ................ 20b26030 00000000 00000000 00000000 00000000 ................ 20b26040 00000000 00000000 00000000 00000000 ................ 20b26050 00000000 00000000 00000000 00000000 ................ 20b26060 00000000 00000000 00000000 00000000 ................ 20b26070 00000000 00000000 00000000 00000000 ................ 20b26080 00000000 00000000 00000000 00000000 ................ 20b26090 00000000 00000000 00000000 00000000 ................ 20b260a0 00000000 00000000 00000000 00000000 ................ 20b260b0 00000000 00000000 00000000 00000000 ................ 20b260c0 00000000 00000000 00000000 00000000 ................ 20b260d0 00000000 00000000 00000000 00000000 ................ 20b260e0 00000000 00000000 00000000 00000000 ................ 20b260f0 00000000 00000000 00000000 00000000 ................ 20b26100 00000000 00000000 00000000 00000000 ................ 20b26110 00000000 00000000 00000000 00000000 ................ 20b26120 00000000 00000000 00000000 00000000 ................ 20b26130 00000000 00000000 00000000 00000000 ................ 20b26140 00000000 00000000 00000000 00000000 ................ 20b26150 00000000 00000000 00000000 00000000 ................ 20b26160 00000000 00000000 00000000 00000000 ................ 20b26170 00000000 00000000 00000000 00000000 ................ 20b26180 00000000 00000000 00000000 00000000 ................ 20b26190 00000000 00000000 00000000 00000000 ................ 20b261a0 00000000 00000000 00000000 00000000 ................ 20b261b0 00000000 00000000 00000000 00000000 ................ 20b261c0 00000000 00000000 00000000 00000000 ................ 20b261d0 00000000 00000000 00000000 00000000 ................ 20b261e0 00000000 00000000 00000000 00000000 ................ 20b261f0 00000000 00000000 00000000 00000000 ................ 20b26200 00000000 00000000 00000000 00000000 ................ 20b26210 00000000 00000000 00000000 00000000 ................ 20b26220 00000000 00000000 00000000 00000000 ................ 20b26230 00000000 00000000 00000000 00000000 ................ 20b26240 00000000 00000000 00000000 00000000 ................ 20b26250 00000000 00000000 00000000 00000000 ................ 20b26260 00000000 00000000 00000000 00000000 ................ 20b26270 00000000 00000000 00000000 00000000 ................ 20b26280 00000000 00000000 00000000 00000000 ................ 20b26290 00000000 00000000 00000000 00000000 ................ 20b262a0 00000000 00000000 00000000 00000000 ................ 20b262b0 00000000 00000000 00000000 00000000 ................ 20b262c0 00000000 00000000 00000000 00000000 ................ 20b262d0 00000000 00000000 00000000 00000000 ................ 20b262e0 00000000 00000000 00000000 00000000 ................ 20b262f0 00000000 00000000 00000000 00000000 ................ 20b26300 00000000 00000000 00000000 00000000 ................ 20b26310 00000000 00000000 00000000 00000000 ................ 20b26320 00000000 00000000 00000000 00000000 ................ 20b26330 00000000 00000000 00000000 00000000 ................ 20b26340 00000000 00000000 00000000 00000000 ................ 20b26350 00000000 00000000 00000000 00000000 ................ 20b26360 00000000 00000000 00000000 00000000 ................ 20b26370 00000000 00000000 00000000 00000000 ................ 20b26380 00000000 00000000 00000000 00000000 ................ 20b26390 00000000 00000000 00000000 00000000 ................ 20b263a0 00000000 00000000 00000000 00000000 ................ 20b263b0 00000000 00000000 00000000 00000000 ................ 20b263c0 00000000 00000000 00000000 00000000 ................ 20b263d0 00000000 00000000 00000000 00000000 ................ 20b263e0 00000000 00000000 00000000 00000000 ................ 20b263f0 00000000 00000000 00000000 00000000 ................ 20b26400 00000000 00000000 00000000 00000000 ................ 20b26410 00000000 00000000 00000000 00000000 ................ 20b26420 00000000 00000000 00000000 00000000 ................ 20b26430 00000000 00000000 00000000 00000000 ................ 20b26440 00000000 00000000 00000000 00000000 ................ 20b26450 00000000 00000000 00000000 00000000 ................ 20b26460 00000000 00000000 00000000 00000000 ................ 20b26470 00000000 00000000 00000000 00000000 ................ 20b26480 00000000 00000000 00000000 00000000 ................ 20b26490 00000000 00000000 00000000 00000000 ................ 20b264a0 00000000 00000000 00000000 00000000 ................ 20b264b0 00000000 00000000 00000000 00000000 ................ 20b264c0 00000000 00000000 00000000 00000000 ................ 20b264d0 00000000 00000000 00000000 00000000 ................ 20b264e0 00000000 00000000 00000000 00000000 ................ 20b264f0 00000000 00000000 00000000 00000000 ................ 20b26500 00000000 00000000 00000000 00000000 ................ 20b26510 00000000 00000000 00000000 00000000 ................ 20b26520 00000000 00000000 00000000 00000000 ................ 20b26530 00000000 00000000 00000000 00000000 ................ 20b26540 00000000 00000000 00000000 00000000 ................ 20b26550 00000000 00000000 00000000 00000000 ................ 20b26560 00000000 00000000 00000000 00000000 ................ 20b26570 00000000 00000000 00000000 00000000 ................ 20b26580 00000000 00000000 00000000 00000000 ................ 20b26590 00000000 00000000 00000000 00000000 ................ 20b265a0 00000000 00000000 00000000 00000000 ................ 20b265b0 00000000 00000000 00000000 00000000 ................ 20b265c0 00000000 00000000 00000000 00000000 ................ 20b265d0 00000000 00000000 00000000 00000000 ................ 20b265e0 00000000 00000000 00000000 00000000 ................ 20b265f0 00000000 00000000 00000000 00000000 ................ 20b26600 00000000 00000000 00000000 00000000 ................ 20b26610 00000000 00000000 00000000 00000000 ................ 20b26620 00000000 00000000 00000000 00000000 ................ 20b26630 00000000 00000000 00000000 00000000 ................ 20b26640 00000000 00000000 00000000 00000000 ................ 20b26650 00000000 00000000 00000000 00000000 ................ 20b26660 00000000 00000000 00000000 00000000 ................ 20b26670 00000000 00000000 00000000 00000000 ................ 20b26680 00000000 00000000 00000000 00000000 ................ 20b26690 00000000 00000000 00000000 00000000 ................ 20b266a0 00000000 00000000 00000000 00000000 ................ 20b266b0 00000000 00000000 00000000 00000000 ................ 20b266c0 00000000 00000000 00000000 00000000 ................ 20b266d0 00000000 00000000 00000000 00000000 ................ 20b266e0 00000000 00000000 00000000 00000000 ................ 20b266f0 00000000 00000000 00000000 00000000 ................ 20b26700 00000000 00000000 00000000 00000000 ................ 20b26710 00000000 00000000 00000000 00000000 ................ 20b26720 00000000 00000000 00000000 00000000 ................ 20b26730 00000000 00000000 00000000 00000000 ................ 20b26740 00000000 00000000 00000000 00000000 ................ 20b26750 00000000 00000000 00000000 00000000 ................ 20b26760 00000000 00000000 00000000 00000000 ................ 20b26770 00000000 00000000 00000000 00000000 ................ 20b26780 00000000 00000000 00000000 00000000 ................ 20b26790 00000000 00000000 00000000 00000000 ................ 20b267a0 00000000 00000000 00000000 00000000 ................ 20b267b0 00000000 00000000 00000000 00000000 ................ 20b267c0 00000000 00000000 00000000 00000000 ................ 20b267d0 00000000 00000000 00000000 00000000 ................ 20b267e0 00000000 00000000 00000000 00000000 ................ 20b267f0 00000000 00000000 00000000 00000000 ................ 20b26800 00000000 00000000 00000000 00000000 ................ 20b26810 00000000 00000000 00000000 00000000 ................ 20b26820 00000000 00000000 00000000 00000000 ................ 20b26830 00000000 00000000 00000000 00000000 ................ 20b26840 00000000 00000000 00000000 00000000 ................ 20b26850 00000000 00000000 00000000 00000000 ................ 20b26860 00000000 00000000 00000000 00000000 ................ 20b26870 00000000 00000000 00000000 00000000 ................ 20b26880 00000000 00000000 00000000 00000000 ................ 20b26890 00000000 00000000 00000000 00000000 ................ 20b268a0 00000000 00000000 00000000 00000000 ................ 20b268b0 00000000 00000000 00000000 00000000 ................ 20b268c0 00000000 00000000 00000000 00000000 ................ 20b268d0 00000000 00000000 00000000 00000000 ................ 20b268e0 00000000 00000000 00000000 00000000 ................ 20b268f0 00000000 00000000 00000000 00000000 ................ 20b26900 00000000 00000000 00000000 00000000 ................ 20b26910 00000000 00000000 00000000 00000000 ................ 20b26920 00000000 00000000 00000000 00000000 ................ 20b26930 00000000 00000000 00000000 00000000 ................ 20b26940 00000000 00000000 00000000 00000000 ................ 20b26950 00000000 00000000 00000000 00000000 ................ 20b26960 00000000 00000000 00000000 00000000 ................ 20b26970 00000000 00000000 00000000 00000000 ................ 20b26980 00000000 00000000 00000000 00000000 ................ 20b26990 00000000 00000000 00000000 00000000 ................ 20b269a0 00000000 00000000 00000000 00000000 ................ 20b269b0 00000000 00000000 00000000 00000000 ................ 20b269c0 00000000 00000000 00000000 00000000 ................ 20b269d0 00000000 00000000 00000000 00000000 ................ 20b269e0 00000000 00000000 00000000 00000000 ................ 20b269f0 00000000 00000000 00000000 00000000 ................ 20b26a00 00000000 00000000 00000000 00000000 ................ 20b26a10 00000000 00000000 00000000 00000000 ................ 20b26a20 00000000 00000000 00000000 00000000 ................ 20b26a30 00000000 00000000 00000000 00000000 ................ 20b26a40 00000000 00000000 00000000 00000000 ................ 20b26a50 00000000 00000000 00000000 00000000 ................ 20b26a60 00000000 00000000 00000000 00000000 ................ 20b26a70 00000000 00000000 00000000 00000000 ................ 20b26a80 00000000 00000000 00000000 00000000 ................ 20b26a90 00000000 00000000 00000000 00000000 ................ 20b26aa0 00000000 00000000 00000000 00000000 ................ 20b26ab0 00000000 00000000 00000000 00000000 ................ 20b26ac0 00000000 00000000 00000000 00000000 ................ 20b26ad0 00000000 00000000 00000000 00000000 ................ 20b26ae0 00000000 00000000 00000000 00000000 ................ 20b26af0 00000000 00000000 00000000 00000000 ................ 20b26b00 00000000 00000000 00000000 00000000 ................ 20b26b10 00000000 00000000 00000000 00000000 ................ 20b26b20 00000000 00000000 00000000 00000000 ................ 20b26b30 00000000 00000000 00000000 00000000 ................ 20b26b40 00000000 00000000 00000000 00000000 ................ 20b26b50 00000000 00000000 00000000 00000000 ................ 20b26b60 00000000 00000000 00000000 00000000 ................ 20b26b70 00000000 00000000 00000000 00000000 ................ 20b26b80 00000000 00000000 00000000 00000000 ................ 20b26b90 00000000 00000000 00000000 00000000 ................ 20b26ba0 00000000 00000000 00000000 00000000 ................ 20b26bb0 00000000 00000000 00000000 00000000 ................ 20b26bc0 00000000 00000000 00000000 00000000 ................ 20b26bd0 00000000 00000000 00000000 00000000 ................ 20b26be0 00000000 00000000 00000000 00000000 ................ 20b26bf0 00000000 00000000 00000000 00000000 ................ 20b26c00 00000000 00000000 00000000 00000000 ................ 20b26c10 00000000 00000000 00000000 00000000 ................ 20b26c20 00000000 00000000 00000000 00000000 ................ 20b26c30 00000000 00000000 00000000 00000000 ................ 20b26c40 00000000 00000000 00000000 00000000 ................ 20b26c50 00000000 00000000 00000000 00000000 ................ 20b26c60 00000000 00000000 00000000 00000000 ................ 20b26c70 00000000 00000000 00000000 00000000 ................ 20b26c80 00000000 00000000 00000000 00000000 ................ 20b26c90 00000000 00000000 00000000 00000000 ................ 20b26ca0 00000000 00000000 00000000 00000000 ................ 20b26cb0 00000000 00000000 00000000 00000000 ................ 20b26cc0 00000000 00000000 00000000 00000000 ................ 20b26cd0 00000000 00000000 00000000 00000000 ................ 20b26ce0 00000000 00000000 00000000 00000000 ................ 20b26cf0 00000000 00000000 00000000 00000000 ................ 20b26d00 00000000 00000000 00000000 00000000 ................ 20b26d10 00000000 00000000 00000000 00000000 ................ 20b26d20 00000000 00000000 00000000 00000000 ................ 20b26d30 00000000 00000000 00000000 00000000 ................ 20b26d40 00000000 00000000 00000000 00000000 ................ 20b26d50 00000000 00000000 00000000 00000000 ................ 20b26d60 00000000 00000000 00000000 00000000 ................ 20b26d70 00000000 00000000 00000000 00000000 ................ 20b26d80 00000000 00000000 00000000 00000000 ................ 20b26d90 00000000 00000000 00000000 00000000 ................ 20b26da0 00000000 00000000 00000000 00000000 ................ 20b26db0 00000000 00000000 00000000 00000000 ................ 20b26dc0 00000000 00000000 00000000 00000000 ................ 20b26dd0 00000000 00000000 00000000 00000000 ................ 20b26de0 00000000 00000000 00000000 00000000 ................ 20b26df0 00000000 00000000 00000000 00000000 ................ 20b26e00 00000000 00000000 00000000 00000000 ................ 20b26e10 00000000 00000000 00000000 00000000 ................ 20b26e20 00000000 00000000 00000000 00000000 ................ 20b26e30 00000000 00000000 00000000 00000000 ................ 20b26e40 00000000 00000000 00000000 00000000 ................ 20b26e50 00000000 00000000 00000000 00000000 ................ 20b26e60 00000000 00000000 00000000 00000000 ................ 20b26e70 00000000 00000000 00000000 00000000 ................ 20b26e80 00000000 00000000 00000000 00000000 ................ 20b26e90 00000000 00000000 00000000 00000000 ................ 20b26ea0 00000000 00000000 00000000 00000000 ................ 20b26eb0 00000000 00000000 00000000 00000000 ................ 20b26ec0 00000000 00000000 00000000 00000000 ................ 20b26ed0 00000000 00000000 abcdbbbb 1f241000 ..............$. 20b26ee0 00000108 00000108 00000000 00000000 ................ 20b26ef0 011c6b10 dcbabbbb 1f1bc8b4 00000002 .k.............. 20b26f00 20b79fd0 20b85fd0 20b28fe8 20b2ffe0 ... ._. ... ... 20b26f10 20b3ffe0 20b4bfe8 20b51fe8 20b57fe8 ... ... ... ... 20b26f20 00000000 00000000 20b5dfa8 00000000 ........... .... 20b26f30 00000000 00000000 1f1bcbf0 00000000 ................ 20b26f40 20b71ff8 00000010 1f1bcbf0 00000000 ... ............ 20b26f50 20b73ff8 00000010 1f1bcbf0 00000000 .?. ............ 20b26f60 20b75ff8 00000010 1f1bcbf0 00000000 ._. ............ 20b26f70 20b77ff8 00000010 00000000 00000000 ... ............ 20b26f80 c0c0c001 00000000 c0c00000 00000002 ................ 20b26f90 01000000 00000101 00000000 00000000 ................ 20b26fa0 00000000 c0c0c000 00000000 00000001 ................ 20b26fb0 00000000 00000000 00000000 00000000 ................ 20b26fc0 00000000 00000000 00000000 00000000 ................ 20b26fd0 00000000 00000000 00000000 00000000 ................ 20b26fe0 00000000 00000000 00000000 00000000 ................ 20b26ff0 00000000 00000000 00000000 c0c0c000 ................ 20b27000 ???????? ????
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