Pointers
GDT_Buffers locates the GDT descriptor for the BUFSEG segment.
BUFSEG
旼컴컴컴컴컴컴컴컫컴컴컴쩡컴컴컫컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커�Field Name �Offset�Length�Type�Description � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫s_MRUHead �+0 �2 쿥 쿓ead of MRU buffer list (LRU tail) � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫s_MRUTail �+2 �2 쿥 쿟ail of MRU buffer list (LRU head) � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫s_FreeHead �+4 �2 쿥 쿓ead of Free buffer list � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫s_Handle �+6 �2 쿥 쿓andle for virtual memory manager � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫s_nBuffers �+8 �2 쿥 쿙umber of buffers in segment � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫s_buffsize �+a �2 쿥 쿞ize of buffer+header, in bytes. � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫s_seglimit �+c �2 쿥 쿗imit for entire buffer segment. � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫s_pStats �+e �2 쿥 쿚ffset of statistics block (for PROFILE)� 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫s_offRemMed �+10 �2 쿥 쿘inimum "legal" offset of buffer for � � � � � 퀁emovable media � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫s_MaxSec �+12 �2 쿥 쿘aximum sector size for block device � � � � � 쿭rivers � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫s_BigBufBase �+14 �2 쿥 쿍ase of big buffers pool � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫s_BigBufMap �+16 �2 쿥 쿍ig buffers usage bit map (bit0 - Buf0) � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫s_physBufSeg �+18 �4 쿏 쿍uffer segment Physical Address � 읕컴컴컴컴컴컴컴컨컴컴컴좔컴컴컨컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸
BUFFINFO
旼컴컴컴컴컴컴컴컫컴컴컴쩡컴컴컫컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 �Field Name �Offset�Length�Type�Description � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫uf_next �+0 �2 쿥 쿛ointer to next buffer in list (-1 = � � � � � 쿮nd) � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫uf_prev �+2 �2 쿥 쿛ointer to previous buffer in list (-1 =� � � � � 쿮nd) � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫uf_freeLink �+4 �2 쿥 쿛ointer to next free buffer (-1 = end) � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫uf_hVPB �+6 �1 쿥 퀂erial number of volume � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫uf_sector �+8 �4 쿏 쿞ector number of buffer � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫uf_wrtcnt �+c �1 쿍 쿑or FAT sectors, # times sector written � � � � � 쿽ut � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫uf_wrtcntinc �+d �2 쿥 쿑or FAT sectors, # sectors between each � � � � � 퀇rite � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫uf_flags �+f �1 쿍 쿑lags � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫uf_tid �+10 �2 쿥 퀃hread ID of buffer owner � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫uf_refcnt �+12 �2 쿥 쿻umber of threads using buffer for read � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫uf_fill �+14 �2 쿥 퀁andom debugging information � 쳐컴컴컴컴컴컴컴컵컴컴컴탠컴컴컵컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿫uf_pad �+16 �2 쿥 쿑orce dword alignment. � 읕컴컴컴컴컴컴컴컨컴컴컴좔컴컴컨컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸
buf_falgs flag definitions:
旼컴컴컴컴컴컴컴컴컴컫컴컴컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴커 쿙ame 쿍it Mask쿏escription � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿍UF_DIRTY �0x80 쿍it 7 = 1 if buffer dirty � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿍UF_VISIT �0x40 쿍it 6 = 1 if buffer seen in search � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿍UF_WANT �0x20 쿍it 5 = 1 if process waiting for buffer � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿍UF_BUSY �0x10 쿍it 4 = 1 if in use by process � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿍UF_ISDATA �0x08 쿍it 3 = 1 if buffer is DATA � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿍UF_ISDIR �0x04 쿍it 2 = 1 if buffer is DIR � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿍UF_ISFAT �0x02 쿍it 1 = 1 if buffer is FAT � 쳐컴컴컴컴컴컴컴컴컴컵컴컴컴컴탠컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴캑 쿍UF_ATTEMPTING_READ �0x01 쿍it 0 = 1 if buffer is in swapper pool � 읕컴컴컴컴컴컴컴컴컴컨컴컴컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴켸