Source code of Windows XP (NT5)
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/* SCCSID = @(#)vm.h 4.2 86/07/21 *//*
* vm.h * * The following macros are used to define * the virtual memory model. */
/* Definition for FPN type (file page number */typedef unsigned short FPN;#define LG2FPN 1
/* Length of long in bits */#define LONGLN (BYTELN*sizeof(long))
/* Log (base 2) of page size */#define LG2PAG 9
/* Log (base 2) of memory size */#define LG2MEM 31
/* Length of page in bytes */#define PAGLEN (1U << LG2PAG)
/* Page offset of virtual address */#define OFFSET(x) ((short)((x) & ~(~0L << LG2PAG)))
/* Page number of virtual address */#define PAGE(x) ((x) >> LG2PAG)
/* Virtual address of page table entry for some virtual address x */#define PTADDR(x) (((x) >> (LG2PAG - LG2FPN)) & (~0L << LG2FPN))
/* Page number of page table entry for some virtual address x */#define PTPAGE(x) ((x) >> (LG2PAG + LG2PAG - LG2FPN))
/* Upper virtual address limit of PT0 */#define LG2LP0 (LG2MEM - LG2PAG + LG2FPN)
#define LIMPT0 (1L << LG2LP0)
/* Upper virtual address limit of PT1 */#define LG2LP1 (LG2LP0 - LG2PAG + LG2FPN)
#define LIMPT1 (1L << LG2LP1)
/* Upper virtual address limit of PT2 */#define LG2LP2 (LG2LP1 - LG2PAG + LG2FPN)
#define LIMPT2 (1L << LG2LP2)
/* Length of PT2 in entries (longs) */#define PT2LEN (1L << (LG2LP1 - LG2PAG))
/* Maximum number of page buffers (hash table can be chars if MAXBUF <= 128) */#if CPU386
#define MAXBUF 128
#elif OSEGEXE
#define MAXBUF 96
#else
#define MAXBUF 64
#endif
/* Virtual memory area definitions *//*
* REMEMBER !!!!!!!!!!!!!!!!!! * * EVERY item you store in virtual memory MUST !!!!! * meet the condition PAGLEN % sizeof(your-item) == 0. */
#define AREASYMS LIMPT0 /* Symbol table VM area start */
#define AREASRCLIN (AREASYMS + (RBMAX << SYMSCALE))
/* $$SRCLINES area start */#define AREAPROPLST (AREASRCLIN + (1L << 20))
#define AREABAKPAT (AREAPROPLST + LXIVK)
#if EXE386
/* Begin area definitions for linear-executable */
#define AREAIMPS (AREABAKPAT + LXIVK)
/* Imported names table area */#define AREAEAT (AREAIMPS + 10*MEGABYTE)
/* Export Address Table area */#define AREAEATAUX (AREAEAT + MEGABYTE)
/* Auxiliary Data Table area */#define AREAEP (AREAEATAUX + MEGABYTE)
/* Entry point area */#define LG2BKT 6 /* Log of hash bucket size */
#define BKTLEN (1 << LG2BKT) /* Bucket length in bytes */
#define AREAHRC (AREAEP + (LXIVK * sizeof(EPTYPE)))
/* Chained relocation hash tables */#define AREARC (AREAHRC + MEGABYTE)
/* Chained relocation hash buckets */#define AREANAMEPTR (AREARC + ((long) BKTLEN << WORDLN))
/* Export Name Pointer Table */#define NAMEPTRSIZE MEGABYTE /* 1Mb */
#define AREAORD (AREANAMEPTR + NAMEPTRSIZE)
/* Export Ordinal Table */#define ORDTABSIZE 8*LXIVK /* 0.5Mb */
#define AREAEXPNAME (AREAORD + ORDTABSIZE)
/* Export Name Table */#define EXPNAMESIZE 64*MEGABYTE /* 64Mb */
#define AREAST (AREAEXPNAME + EXPNAMESIZE)
#define AREAMOD (AREAST + LXIVK)
/* Module Reference Table Area */#define AREAHD (AREAMOD + MEGABYTE)
#define AREAPDIR (AREAHD + MEGABYTE)
#define AREAIMPMOD (AREAPDIR + MEGABYTE)
#define AREAFPAGE (AREAIMPMOD + MEGABYTE)
#define AREACV (AREAFPAGE + MEGABYTE)
#define AREASORT (AREACV + (32*MEGABYTE))
#define AREAEXESTR (AREASORT + LXIVK)
#define AREACONTRIBUTION (AREAEXESTR + LXIVK)
#define AREAPAGERANGE (AREACONTRIBUTION + LXIVK)
#define AREACVDNT (AREAPAGERANGE + (8*MEGABYTE))
#define AREAFSA (AREACVDNT + LXIVK)
/* Segment area start */#define AREASA(sa) (mpsaVMArea[sa]) /* Virtual address of nth object */
#define AREAFREE (0xffffffffL)
/* First free VM address */#else
/* Begin area definitions for protect-mode exes */
#define AREANRNT (AREABAKPAT + LXIVK)
#define AREARNT (AREANRNT + LXIVK)
#define AREAIMPS (AREARNT + LXIVK)
/* Imported names table area */#define AREAET (AREAIMPS + LXIVK)
/* Entry Table area */#define AREAEP (AREAET + LXIVK)/* Entry point area */
#define LG2BKT 6 /* Log of hash bucket size */
#define BKTLEN (1 << LG2BKT) /* Bucket length in bytes */
#define AREAHRC (AREAEP + (LXIVK * sizeof(EPTYPE)))
/* Chained relocation hash tables */#define AREARC (AREAHRC + ((long) SAMAX * PAGLEN / 2))
/* Chained relocation hash buckets */#define AREAST (AREARC + ((long) BKTLEN << WORDLN))
#define AREAMOD (AREAST + LXIVK)/* Module Reference Table Area */
#define AREASORT (AREAMOD + LXIVK)
#define AREAEXESTR (AREASORT + (LXIVK << 2))
#define AREACONTRIBUTION (AREAEXESTR + LXIVK)
#define AREACVDNT (AREACONTRIBUTION + LXIVK)
#define AREAFSA (AREACVDNT + LXIVK)
#define AREASA(sa) (AREAFSA + ((long) (sa) << WORDLN))
/* Virtual address of nth segment */#define AREAFREE (AREAFSA + ((long) SAMAX << WORDLN))
/* First free VM address */#define AREACV (AREAPACKRGRLE + MEGABYTE)
#endif
/* Virtual memory area definitions for DOS 3 exes */#define AREAFSG AREAFSA /* Segment area start */
#define AREARGRLE (AREAFSG + ((long) GSNMAX << 16))
/* Relocation table area start */#define LG2ARLE 17 /* Log (base 2) of reloc table size */
#define AREAPACKRGRLE (AREARGRLE + (IOVMAX * (1L << LG2ARLE)))
/* Packed relocation area start */
#define VPLIB1ST (1L << (LG2MEM - LG2PAG))
/* First page of library area
* NOTE: This page number cannot * be derived from any legal virtual * address. Libraries will always be * accessed by page number. */
/* Index of virtual page touched most recently */short picur;
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