MS DOS 6.0 操作系统源码完整版,对于研制操作系统结构,构建个人的操作系统是非常有用的.
源代码在线查看： exe.h
/* exe.h - structure of an exe file header */
/* Include some new .exe file info from \link\newexe.h */
#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 */
#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
#define NEMAGIC 0x454E /* New magic number */
#define NERESBYTES 8 /* Eight bytes reserved (now) */
#define NECRC 8 /* Offset into new header of NE_CRC */
#define NEDEFSTUBMSG 0x4E /* Offset into file of default stub msg */
#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_IPHI(x) (x).ne_iphi
#define NE_SPHI(x) (x).ne_sphi
#define NE_RES(x) (x).ne_res
#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)
/*
* Format of NE_FLAGS(x):
*
* p Not-a-process
* x Unused
* e Errors in image
* xxxxx Unused
* f Floating-point instructions
* 3 386 instructions
* 2 286 instructions
* 0 8086 instructions
* P Protected mode only
* x Unused
* i Instance data
* s Solo data
*/
#define NENOTP 0x8000 /* Not a process */
#define NEIERR 0x2000 /* Errors in image */
#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 NEINST 0x0002 /* Instance data */
#define NESOLO 0x0001 /* Solo data */
struct exeType {
char signature[2]; /* zibo's signature */
unsigned cbPage; /* bytes in image mod 512 */
unsigned cPage; /* size of file in 512 byte pages */
unsigned cReloc; /* number of relocation items */
unsigned cParDir; /* number of paragraphs before image */
unsigned cMinAlloc; /* minimum number of paragrapsh */
unsigned cMaxAlloc; /* maximum number of paragrapsh */
unsigned sStack; /* segment of stack in image */
unsigned oStack; /* offset of stack in image */
unsigned chksum; /* checksum of file */
unsigned oEntry; /* offset of entry point */
unsigned sEntry; /* segment of entry point */
unsigned oReloc; /* offset in file of reloc table */
unsigned iOverlay; /* overlay number */
};
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 */
};
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_iphi; /* High word of initial IP */
unsigned short ne_sphi; /* High word of initial SP */
char ne_res[NERESBYTES];
/* Pad structure to 64 bytes */
};
enum exeKind {
IOERROR, /* Error, file cannot be accessed */
NOTANEXE, /* Error, file is not an .EXE file */
OLDEXE, /* "oldstyle" DOS 3.XX .exe */
NEWEXE, /* "new" .exe, OS is unknown */
WINDOWS, /* Windows executable */
DOS4, /* DOS 4.XX .EXE */
DOS286, /* 286DOS .EXE */
EXEBOUND, /* 286DOS .EXE, bound */
DYNALINK /* Dynamlink link module */
};
