/*
* SCCSID = @(#)newexe.h 13.4 89/06/26
*
* Title
*
* newexe.h
* Pete Stewart
* (C) Copyright Microsoft Corp 1984-1998
* 17 August 1984
*
* Description
*
* Data structure definitions for the DOS 4.0/Windows 2.0
* executable file format.
*
* Modification History
*
* 84/08/17 Pete Stewart Initial version
* 84/10/17 Pete Stewart Changed some constants to match OMF
* 84/10/23 Pete Stewart Updates to match .EXE format revision
* 84/11/20 Pete Stewart Substantial .EXE format revision
* 85/01/09 Pete Stewart Added constants ENEWEXE and ENEWHDR
* 85/01/10 Steve Wood Added resource definitions
* 85/03/04 Vic Heller Reconciled Windows and DOS 4.0 versions
* 85/03/07 Pete Stewart Added movable entry count
* 85/04/01 Pete Stewart Segment alignment field, error bit
* 85/10/03 Reuben Borman Removed segment discard priority
* 85/10/11 Vic Heller Added PIF header fields
* 86/03/10 Reuben Borman Changes for DOS 5.0
* 86/09/02 Reuben Borman NSPURE ==> NSSHARED
* 87/05/04 Reuben Borman Added ne_cres and NSCONFORM
* 87/07/08 Reuben Borman Added NEAPPTYPE definitions
* 88/03/24 Wieslaw Kalkus Added 32-bit .EXE format
* 89/03/23 Wieslaw Kalkus Added ne_flagsothers for OS/2 1.2
*/
/*INT32*/
/*_________________________________________________________________*
| |
| |
| DOS3 .EXE FILE HEADER DEFINITION |
| |
|_________________________________________________________________|
* */
#define EMAGIC 0x5A4D /* Old magic number */
#define ENEWEXE sizeof(struct exe_hdr)
/* Value of E_LFARLC for new .EXEs */
#define ENEWHDR 0x003C /* Offset in old hdr. of ptr. to new */
#define ERESWDS 0x0010 /* No. of reserved words (OLD) */
#define ERES1WDS 0x0004 /* No. of reserved words in e_res */
#define ERES2WDS 0x000A /* No. of reserved words in e_res2 */
#define ECP 0x0004 /* Offset in struct of E_CP */
#define ECBLP 0x0002 /* Offset in struct of E_CBLP */
#define EMINALLOC 0x000A /* Offset in struct of E_MINALLOC */
struct exe_hdr { /* DOS 1, 2, 3 .EXE header */
unsigned short e_magic; /* Magic number */
unsigned short e_cblp; /* Bytes on last page of file */
unsigned short e_cp; /* Pages in file */
unsigned short e_crlc; /* Relocations */
unsigned short e_cparhdr; /* Size of header in paragraphs */
unsigned short e_minalloc; /* Minimum extra paragraphs needed */
unsigned short e_maxalloc; /* Maximum extra paragraphs needed */
unsigned short e_ss; /* Initial (relative) SS value */
unsigned short e_sp; /* Initial SP value */
unsigned short e_csum; /* Checksum */
unsigned short e_ip; /* Initial IP value */
unsigned short e_cs; /* Initial (relative) CS value */
unsigned short e_lfarlc; /* File address of relocation table */
unsigned short e_ovno; /* Overlay number */
unsigned short e_res[ERES1WDS];/* Reserved words */
unsigned short e_oemid; /* OEM identifier (for e_oeminfo) */
unsigned short e_oeminfo; /* OEM information; e_oemid specific */
unsigned short e_res2[ERES2WDS];/* Reserved words */
long e_lfanew; /* File address of new exe header */
};
/* XLATOFF */
#define E_MAGIC(x) (x).e_magic
#define E_CBLP(x) (x).e_cblp
#define E_CP(x) (x).e_cp
#define E_CRLC(x) (x).e_crlc
#define E_CPARHDR(x) (x).e_cparhdr
#define E_MINALLOC(x) (x).e_minalloc
#define E_MAXALLOC(x) (x).e_maxalloc
#define E_SS(x) (x).e_ss
#define E_SP(x) (x).e_sp
#define E_CSUM(x) (x).e_csum
#define E_IP(x) (x).e_ip
#define E_CS(x) (x).e_cs
#define E_LFARLC(x) (x).e_lfarlc
#define E_OVNO(x) (x).e_ovno
#define E_RES(x) (x).e_res
#define E_OEMID(x) (x).e_oemid
#define E_OEMINFO(x) (x).e_oeminfo
#define E_RES2(x) (x).e_res2
#define E_LFANEW(x) (x).e_lfanew
/* XLATON */
/*_________________________________________________________________*
| |
| |
| OS/2 & WINDOWS .EXE FILE HEADER DEFINITION - 286 version |
| |
|_________________________________________________________________|
* */
#define NEMAGIC 0x454E /* New magic number */
#define NECRC 8 /* Offset into new header of NE_CRC */
#ifdef CRUISER
#define NERESBYTES 8 /* Eight bytes reserved (now) */
struct new_exe { /* New .EXE header */
unsigned short ne_magic; /* Magic number NE_MAGIC */
unsigned char ne_ver; /* Version number */
unsigned char ne_rev; /* Revision number */
unsigned short ne_enttab; /* Offset of Entry Table */
unsigned short ne_cbenttab; /* Number of bytes in Entry Table */
long ne_crc; /* Checksum of whole file */
unsigned short ne_flags; /* Flag word */
unsigned short ne_autodata; /* Automatic data segment number */
unsigned short ne_heap; /* Initial heap allocation */
unsigned short ne_stack; /* Initial stack allocation */
long ne_csip; /* Initial CS:IP setting */
long ne_sssp; /* Initial SS:SP setting */
unsigned short ne_cseg; /* Count of file segments */
unsigned short ne_cmod; /* Entries in Module Reference Table */
unsigned short ne_cbnrestab; /* Size of non-resident name table */
unsigned short ne_segtab; /* Offset of Segment Table */
unsigned short ne_rsrctab; /* Offset of Resource Table */
unsigned short ne_restab; /* Offset of resident name table */
unsigned short ne_modtab; /* Offset of Module Reference Table */
unsigned short ne_imptab; /* Offset of Imported Names Table */
long ne_nrestab; /* Offset of Non-resident Names Table */
unsigned short ne_cmovent; /* Count of movable entries */
unsigned short ne_align; /* Segment alignment shift count */
unsigned short ne_cres; /* Count of resource entries */
unsigned char ne_exetyp; /* Target operating system */
unsigned char ne_flagsothers; /* Other .EXE flags */
char ne_res[NERESBYTES];
/* Pad structure to 64 bytes */
};
#else
#define NERESBYTES 0
struct new_exe { /* New .EXE header */
unsigned short int ne_magic; /* Magic number NE_MAGIC */
char ne_ver; /* Version number */
char ne_rev; /* Revision number */
unsigned short int ne_enttab; /* Offset of Entry Table */
unsigned short int ne_cbenttab; /* Number of bytes in Entry Table */
long ne_crc; /* Checksum of whole file */
unsigned short int ne_flags; /* Flag word */
unsigned short int ne_autodata; /* Automatic data segment number */
unsigned short int ne_heap; /* Initial heap allocation */
unsigned short int ne_stack; /* Initial stack allocation */
long ne_csip; /* Initial CS:IP setting */
long ne_sssp; /* Initial SS:SP setting */
unsigned short int ne_cseg; /* Count of file segments */
unsigned short int ne_cmod; /* Entries in Module Reference Table */
unsigned short int ne_cbnrestab; /* Size of non-resident name table */
unsigned short int ne_segtab; /* Offset of Segment Table */
unsigned short int ne_rsrctab; /* Offset of Resource Table */
unsigned short int ne_restab; /* Offset of resident name table */
unsigned short int ne_modtab; /* Offset of Module Reference Table */
unsigned short int ne_imptab; /* Offset of Imported Names Table */
long ne_nrestab; /* Offset of Non-resident Names Table */
unsigned short int ne_cmovent; /* Count of movable entries */
unsigned short int ne_align; /* Segment alignment shift count */
unsigned short int ne_cres; /* Count of resource segments */
unsigned char ne_exetyp; /* Target operating system */
unsigned char ne_flagsothers; /* Other .EXE flags */
unsigned short int ne_pretthunks; /* offset to return thunks */
unsigned short int ne_psegrefbytes;/* offset to segment ref. bytes */
unsigned short int ne_swaparea; /* Minimum code swap area size */
unsigned short int ne_expver; /* Expected Windows version number */
};
#endif
/* ASM
; Chksum not supported unless ne_psegcsum defined in NEW_EXE structure
ne_psegcsum = word ptr ne_exetyp
ne_onextexe = word ptr ne_crc
; New 3.0 Gang Load area description
ne_gang_start = ne_pretthunks
ne_gang_length = ne_psegrefbytes
new_exe1 struc
dw ?
ne_usage dw ?
dw ?
ne_pnextexe dw ?
ne_pautodata dw ?
ne_pfileinfo dw ?
new_exe1 ends
*/
/* XLATOFF */
#define NE_MAGIC(x) (x).ne_magic
#define NE_VER(x) (x).ne_ver
#define NE_REV(x) (x).ne_rev
#define NE_ENTTAB(x) (x).ne_enttab
#define NE_CBENTTAB(x) (x).ne_cbenttab
#define NE_CRC(x) (x).ne_crc
#define NE_FLAGS(x) (x).ne_flags
#define NE_AUTODATA(x) (x).ne_autodata
#define NE_HEAP(x) (x).ne_heap
#define NE_STACK(x) (x).ne_stack
#define NE_CSIP(x) (x).ne_csip
#define NE_SSSP(x) (x).ne_sssp
#define NE_CSEG(x) (x).ne_cseg
#define NE_CMOD(x) (x).ne_cmod
#define NE_CBNRESTAB(x) (x).ne_cbnrestab
#define NE_SEGTAB(x) (x).ne_segtab
#define NE_RSRCTAB(x) (x).ne_rsrctab
#define NE_RESTAB(x) (x).ne_restab
#define NE_MODTAB(x) (x).ne_modtab
#define NE_IMPTAB(x) (x).ne_imptab
#define NE_NRESTAB(x) (x).ne_nrestab
#define NE_CMOVENT(x) (x).ne_cmovent
#define NE_ALIGN(x) (x).ne_align
#define NE_CRES(x) (x).ne_cres
#define NE_RES(x) (x).ne_res
#define NE_EXETYP(x) (x).ne_exetyp
#define NE_FLAGSOTHERS(x) (x).ne_flagsothers
#define NE_USAGE(x) (WORD)*((WORD *)(x)+1)
#define NE_PNEXTEXE(x) (WORD)(x).ne_cbenttab
#define NE_ONEWEXE(x) (WORD)(x).ne_crc
#define NE_PFILEINFO(x) (WORD)((DWORD)(x).ne_crc >> 16)
#ifdef DOS5
#define NE_MTE(x) (x).ne_psegcsum /* DOS 5 MTE handle for this module */
#endif
/* XLATON */
/*
* Format of NE_FLAGS(x):
*
* p Not-a-process
* x Unused
* e Errors in image
* x Unused
* b Bound Family/API
* ttt Application type
* f Floating-point instructions
* 3 386 instructions
* 2 286 instructions
* 0 8086 instructions
* P Protected mode only
* p Per-process library initialization
* i Instance data
* s Solo data
*/
#define NENOTP 0x8000 /* Not a process */
#define NENONC 0x4000 /* Non-conforming program */
#define NEPRIVLIB 0x4000 /* A lib which lives above the line */
#define NEIERR 0x2000 /* Errors in image */
#define NEBOUND 0x0800 /* Bound Family/API */
#define NEAPPTYP 0x0700 /* Application type mask */
#define NENOTWINCOMPAT 0x0100 /* Not compatible with P.M. Windowing */
#define NEWINCOMPAT 0x0200 /* Compatible with P.M. Windowing */
#define NEWINAPI 0x0300 /* Uses P.M. Windowing API */
#define NEFLTP 0x0080 /* Floating-point instructions */
#define NEI386 0x0040 /* 386 instructions */
#define NEI286 0x0020 /* 286 instructions */
#define NEI086 0x0010 /* 8086 instructions */
#define NEPROT 0x0008 /* Runs in protected mode only */
#define NEREAL 0x0004 /* Runs in real mode */
#define NEPPLI 0x0004 /* Per-Process Library Initialization */
#define NEINST 0x0002 /* Instance data */
#define NESOLO 0x0001 /* Solo data */
/*
* Below are the private bits used by the Windows 2.0 loader. All are
* in the file, with the exception of NENONRES and NEWINPROT which are
* runtime only flags.
*/
#define NEWINPROT NEIERR
#define NENONRES NEFLTP /* Contains non-resident code segments */
#define NEALLOCHIGH NEI386 /* Private allocs above the line okay */
#define NEEMSSEPINST NEI286 /* Want each instance in separate */
#define NELIM32 NEI086 /* Uses LIM 3.2 API (Intel Above board) */
/*
* Format of NE_FLAGSOTHERS(x):
*
* 7 6 5 4 3 2 1 0 - bit no
* | | | |
* | | | +---------------- Support for long file names
* | | +------------------------ Reserved for Win16 loader: must be 0
* | +---------------------------- Intl versions use this for ml shell
* +------------------------------ Some segs of this module get patched
*/
#define NELONGNAMES 0x01
#define NEFORCESTUB 0x02 /* WIN40 - Always run the stub from DOS */
#define NEINFONT 0x02 /* WIN30 - 2.x app runs in 3.x prot mode */
#define NEINPROT 0x04 /* WIN30 - 2.x app gets proportional font */
#define NEGANGLOAD 0x08 /* WIN30 - Contains gangload area */
#define NEASSUMENODEP 0x10 /* Reserved for Win16 loader. Must be 0 in file */
#define NEINTLAPP 0x40 /* WIN31 - intl versions use this. */
#define NEHASPATCH 0x80 /* WIN40 - Some segs of this module get patched */
/*
* Target operating systems
*/
#define NE_UNKNOWN 0x0 /* Unknown (any "new-format" OS) */
#define NE_OS2 0x1 /* Microsoft/IBM OS/2 (default) */
#define NE_WINDOWS 0x2 /* Microsoft Windows */
#define NE_DOS4 0x3 /* Microsoft MS-DOS 4.x */
#define NE_DEV386 0x4 /* Microsoft Windows 386 */
#ifndef NO_APPLOADER
#define NEAPPLOADER 0x0800 /* set if app has its own loader */
#endif /* !NO_APPLOADER */
struct new_seg { /* New .EXE segment table entry */
unsigned short ns_sector; /* File sector of start of segment */
unsigned short ns_cbseg; /* Number of bytes in file */
unsigned short ns_flags; /* Attribute flags */
unsigned short ns_minalloc; /* Minimum allocation in bytes */
};
/* ASM
new_seg1 struc
db size new_seg dup (?)
ns_handle dw ?
new_seg1 ends
*/
/* XLATOFF */
struct new_seg1 { /* New .EXE segment table entry */
unsigned short ns_sector; /* File sector of start of segment */
unsigned short ns_cbseg; /* Number of bytes in file */
unsigned short ns_flags; /* Attribute flags */
unsigned short ns_minalloc; /* Minimum allocation in bytes */
unsigned short ns_handle; /* Handle of segment */
};
#define NS_SECTOR(x) (x).ns_sector
#define NS_CBSEG(x) (x).ns_cbseg
#define NS_FLAGS(x) (x).ns_flags
#define NS_MINALLOC(x) (x).ns_minalloc
/* XLATON */
/*
* Format of NS_FLAGS(x)
*
* Flag word has the following format:
*
* 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 - bit no
* | | | | | | | | | | | | | | |
* | | | | | | | | | | | | +-+-+--- Segment type DATA/CODE
* | | | | | | | | | | | +--------- Iterated segment
* | | | | | | | | | | +----------- Movable segment
* | | | | | | | | | +------------- Segment can be shared
* | | | | | | | | +--------------- Preload segment
* | | | | | | | +----------------- Execute/read-only for code/data segment
* | | | | | | +------------------- Segment has relocations
* | | | | | +--------------------- Code conforming/Data is expand down
* | | | +--+----------------------- I/O privilege level
* | | +----------------------------- Discardable segment
* | +-------------------------------- 32-bit code segment
* +----------------------------------- Huge segment/GDT allocation requested
*
*/
#define NSTYPE 0x0007 /* Segment type mask */
#define NSCODE 0x0000 /* Code segment */
#define NSDATA 0x0001 /* Data segment */
#define NSITER 0x0008 /* Iterated segment flag */
#define NSMOVE 0x0010 /* Movable segment flag */
#define NSPURE 0x0020 /* Pure segment flag */
#define NSSHARED 0x0020 /* Shared segment flag */
#define NSSHARE 0x0020
#define NSPRELOAD 0x0040 /* Preload segment flag */
#define NSEXRD 0x0080 /* Execute-only (code segment) or */
#define NSERONLY 0x0080 /* read-only (data segment) */
#define NSRELOC 0x0100 /* Segment has relocations */
#define NSCONFORM 0x0200 /* Conforming segment */
#define NSEXPDOWN 0x0200 /* Data segment is expand down */
#define NSDEBUG 0x0200 /* Segment has debug info */
#define NSDPL 0x0C00 /* I/O privilege level (286 DPL bits) */
#define SHIFTDPL 10 /* Left shift count for SEGDPL field */
#define NSDISCARD 0x1000 /* Segment is discardable */
#define NS32BIT 0x2000 /* 32-bit code segment */
#define NSHUGE 0x4000 /* Huge memory segment, length of
segment and minimum allocation
size are in segment sector units */
#define NSGDT 0x8000 /* GDT allocation requested */
#define NS286DOS 0xEE06 /* These bits only used by 286DOS */
#define NSALIGN 9 /* Segment data aligned on 512 byte
boundaries */
#define NSALLOCED 0x0002 /* Set if ns_handle points to
uninitialized mem */
#define NSLOADED 0x0004 /* ns_sector field contains memory
address */
#define NSUSESDATA 0x0400 /* Set if an entry point in this
segment uses the automatic data
segment of a SOLO library */
#define NSGETHIGH 0x0200
#define NSINDIRECT 0x2000
#define NSWINCODE 0x4000 /* flag for code */
#define NSKCACHED 0x0800 /* cached by kernel */
#define NSPRIVLIB NSITER
#define NSNOTP 0x8000
#ifndef NO_APPLOADER
#define NSCACHED 0x8000 /* in AppLoader Cache */
#endif /*!NO_APPLOADER */
/* XLATOFF */
struct new_segdata { /* Segment data */
union {
struct {
unsigned short ns_niter; /* number of iterations */
unsigned short ns_nbytes; /* number of bytes */
char ns_iterdata; /* iterated data bytes */
} ns_iter;
struct {
char ns_data; /* data bytes */
} ns_noniter;
} ns_union;
};
/* XLATON */
struct new_rlcinfo { /* Relocation info */
unsigned short nr_nreloc; /* number of relocation items that */
}; /* follow */
/* XLATOFF */
#pragma pack(1)
struct new_rlc { /* Relocation item */
char nr_stype; /* Source type */
char nr_flags; /* Flag byte */
unsigned short nr_soff; /* Source offset */
union {
struct {
char nr_segno; /* Target segment number */
char nr_res; /* Reserved */
unsigned short nr_entry; /* Target Entry Table offset */
} nr_intref; /* Internal reference */
struct {
unsigned short nr_mod; /* Index into Module Reference Table */
unsigned short nr_proc; /* Procedure ordinal or name offset */
} nr_import; /* Import */
struct {
unsigned short nr_ostype; /* OSFIXUP type */
unsigned short nr_osres; /* reserved */
} nr_osfix; /* Operating system fixup */
} nr_union; /* Union */
};
#pragma pack()
/* XLATON */
/* ASM
new_rlc struc
nr_stype db ?
nr_flags db ?
nr_soff dw ?
nr_mod dw ?
nr_proc dw ?
new_rlc ends
nr_segno equ nr_flags+3
nr_entry equ nr_proc
*/
/* XLATOFF */
#define NR_STYPE(x) (x).nr_stype
#define NR_FLAGS(x) (x).nr_flags
#define NR_SOFF(x) (x).nr_soff
#define NR_SEGNO(x) (x).nr_union.nr_intref.nr_segno
#define NR_RES(x) (x).nr_union.nr_intref.nr_res
#define NR_ENTRY(x) (x).nr_union.nr_intref.nr_entry
#define NR_MOD(x) (x).nr_union.nr_import.nr_mod
#define NR_PROC(x) (x).nr_union.nr_import.nr_proc
#define NR_OSTYPE(x) (x).nr_union.nr_osfix.nr_ostype
#define NR_OSRES(x) (x).nr_union.nr_osfix.nr_osres
/* XLATON */
/*
* Format of NR_STYPE(x) and R32_STYPE(x):
*
* 7 6 5 4 3 2 1 0 - bit no
* | | | |
* +-+-+-+--- source type
*
*/
#define NRSTYP 0x0f /* Source type mask */
#define NRSBYT 0x00 /* lo byte (8-bits)*/
#define NRSBYTE 0x00
#define NRSSEG 0x02 /* 16-bit segment (16-bits) */
#define NRSPTR 0x03 /* 16:16 pointer (32-bits) */
#define NRSOFF 0x05 /* 16-bit offset (16-bits) */
#define NRPTR48 0x06 /* 16:32 pointer (48-bits) */
#define NROFF32 0x07 /* 32-bit offset (32-bits) */
#define NRSOFF32 0x08 /* 32-bit self-relative offset (32-bits) */
/*
* Format of NR_FLAGS(x) and R32_FLAGS(x):
*
* 7 6 5 4 3 2 1 0 - bit no
* | | |
* | +-+--- Reference type
* +------- Additive fixup
*/
#define NRADD 0x04 /* Additive fixup */
#define NRRTYP 0x03 /* Reference type mask */
#define NRRINT 0x00 /* Internal reference */
#define NRRORD 0x01 /* Import by ordinal */
#define NRRNAM 0x02 /* Import by name */
#define NRROSF 0x03 /* Operating system fixup */
#define OSFIXUP NRROSF
/* Resource type or name string */
struct rsrc_string {
char rs_len; /* number of bytes in string */
char rs_string[ 1 ]; /* text of string */
};
/* XLATOFF */
#define RS_LEN( x ) (x).rs_len
#define RS_STRING( x ) (x).rs_string
/* XLATON */
/* Resource type information block */
struct rsrc_typeinfo {
unsigned short rt_id;
unsigned short rt_nres;
long rt_proc;
};
/* XLATOFF */
#define RT_ID( x ) (x).rt_id
#define RT_NRES( x ) (x).rt_nres
#define RT_PROC( x ) (x).rt_proc
/* XLATON */
/* Resource name information block */
struct rsrc_nameinfo {
/* The following two fields must be shifted left by the value of */
/* the rs_align field to compute their actual value. This allows */
/* resources to be larger than 64k, but they do not need to be */
/* aligned on 512 byte boundaries, the way segments are */
unsigned short rn_offset; /* file offset to resource data */
unsigned short rn_length; /* length of resource data */
unsigned short rn_flags; /* resource flags */
unsigned short rn_id; /* resource name id */
unsigned short rn_handle; /* If loaded, then global handle */
unsigned short rn_usage; /* Initially zero. Number of times */
/* the handle for this resource has */
/* been given out */
};
/* XLATOFF */
#define RN_OFFSET( x ) (x).rn_offset
#define RN_LENGTH( x ) (x).rn_length
#define RN_FLAGS( x ) (x).rn_flags
#define RN_ID( x ) (x).rn_id
#define RN_HANDLE( x ) (x).rn_handle
#define RN_USAGE( x ) (x).rn_usage
/* XLATON */
#define RSORDID 0x8000 /* if high bit of ID set then integer id */
/* otherwise ID is offset of string from
the beginning of the resource table */
/* Ideally these are the same as the */
/* corresponding segment flags */
#define RNMOVE 0x0010 /* Moveable resource */
#define RNPURE 0x0020 /* Pure (read-only) resource */
#define RNPRELOAD 0x0040 /* Preloaded resource */
#define RNDISCARD 0x1000 /* Discard priority level for resource */
#define RNLOADED 0x0004 /* True if handler proc return handle */
#define RNUNUSED 0x0EF8B /* Unused resource flags */
/* XLATOFF */
/* Resource table */
struct new_rsrc {
unsigned short rs_align; /* alignment shift count for resources */
struct rsrc_typeinfo rs_typeinfo;
};
#define RS_ALIGN( x ) (x).rs_align
/* XLATON */
/* ASM
new_rsrc struc
rs_align dw ?
new_rsrc ends
entfixed struc
entflags db ?
entoffset dw ?
entfixed ends
pent struc
penttype db ?
pentflags db ?
pentsegno db ?
pentoffset dw ?
pent ends
pm_entstruc struc
pm_entstart dw ?
pm_entend dw ?
pm_entnext dw ?
pm_entstruc ends
ENT_UNUSED = 000h
ENT_ABSSEG = 0FEh
ENT_MOVEABLE = 0FFh
ENT_PUBLIC = 001h
ENT_DATA = 002h
INTOPCODE = 0CDh
savedCS = 4
savedIP = 2
savedBP = 0
savedDS = -2
*/