dlls/krnl386.exe16/kernel16_private.h

   1 /*
   2  * Kernel 16-bit private definitions
   3  *
   4  * Copyright 1995 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #ifndef __WINE_KERNEL16_PRIVATE_H
  22 #define __WINE_KERNEL16_PRIVATE_H
  23
  24 #include "wine/winbase16.h"
  25 #include "winreg.h"
  26 #include "winternl.h"
  27 #include "wine/asm.h"
  28
  29 #include "pshpack1.h"
  30
  31 /* In-memory module structure. See 'Windows Internals' p. 219 */
  32 typedef struct _NE_MODULE
  33 {
  34     WORD      ne_magic;         /* 00 'NE' signature */
  35     WORD      count;            /* 02 Usage count (ne_ver/ne_rev on disk) */
  36     WORD      ne_enttab;        /* 04 Near ptr to entry table */
  37     HMODULE16 next;             /* 06 Selector to next module (ne_cbenttab on disk) */
  38     WORD      dgroup_entry;     /* 08 Near ptr to segment entry for DGROUP (ne_crc on disk) */
  39     WORD      fileinfo;         /* 0a Near ptr to file info (OFSTRUCT) (ne_crc on disk) */
  40     WORD      ne_flags;         /* 0c Module flags */
  41     WORD      ne_autodata;      /* 0e Logical segment for DGROUP */
  42     WORD      ne_heap;          /* 10 Initial heap size */
  43     WORD      ne_stack;         /* 12 Initial stack size */
  44     DWORD     ne_csip;          /* 14 Initial cs:ip */
  45     DWORD     ne_sssp;          /* 18 Initial ss:sp */
  46     WORD      ne_cseg;          /* 1c Number of segments in segment table */
  47     WORD      ne_cmod;          /* 1e Number of module references */
  48     WORD      ne_cbnrestab;     /* 20 Size of non-resident names table */
  49     WORD      ne_segtab;        /* 22 Near ptr to segment table */
  50     WORD      ne_rsrctab;       /* 24 Near ptr to resource table */
  51     WORD      ne_restab;        /* 26 Near ptr to resident names table */
  52     WORD      ne_modtab;        /* 28 Near ptr to module reference table */
  53     WORD      ne_imptab;        /* 2a Near ptr to imported names table */
  54     DWORD     ne_nrestab;       /* 2c File offset of non-resident names table */
  55     WORD      ne_cmovent;       /* 30 Number of moveable entries in entry table*/
  56     WORD      ne_align;         /* 32 Alignment shift count */
  57     WORD      ne_cres;          /* 34 # of resource segments */
  58     BYTE      ne_exetyp;        /* 36 Operating system flags */
  59     BYTE      ne_flagsothers;   /* 37 Misc. flags */
  60     HANDLE16  dlls_to_init;     /* 38 List of DLLs to initialize (ne_pretthunks on disk) */
  61     HANDLE16  nrname_handle;    /* 3a Handle to non-resident name table (ne_psegrefbytes on disk) */
  62     WORD      ne_swaparea;      /* 3c Min. swap area size */
  63     WORD      ne_expver;        /* 3e Expected Windows version */
  64     /* From here, these are extra fields not present in normal Windows */
  65     HMODULE   module32;         /* PE module handle for Win32 modules */
  66     HMODULE   owner32;          /* PE module containing this one for 16-bit builtins */
  67     HMODULE16 self;             /* Handle for this module */
  68     WORD      self_loading_sel; /* Selector used for self-loading apps. */
  69     LPVOID    rsrc32_map;       /* HRSRC 16->32 map (for 32-bit modules) */
  70     LPCVOID   mapping;          /* mapping of the binary file */
  71     SIZE_T    mapping_size;     /* size of the file mapping */
  72 } NE_MODULE;
  73
  74 typedef struct
  75 {
  76     BYTE type;
  77     BYTE flags;
  78     BYTE segnum;
  79     WORD offs;
  80 } ET_ENTRY;
  81
  82 typedef struct
  83 {
  84     WORD first; /* ordinal */
  85     WORD last;  /* ordinal */
  86     WORD next;  /* bundle */
  87 } ET_BUNDLE;
  88
  89
  90   /* In-memory segment table */
  91 typedef struct
  92 {
  93     WORD      filepos;   /* Position in file, in sectors */
  94     WORD      size;      /* Segment size on disk */
  95     WORD      flags;     /* Segment flags */
  96     WORD      minsize;   /* Min. size of segment in memory */
  97     HANDLE16  hSeg;      /* Selector or handle (selector - 1) of segment in memory */
  98 } SEGTABLEENTRY;
  99
 100 /* this structure is always located at offset 0 of the DGROUP segment */
 101 typedef struct
 102 {
 103     WORD null;        /* Always 0 */
 104     WORD old_sp;      /* Stack pointer; used by SwitchTaskTo() */
 105     WORD old_ss;
 106     WORD heap;        /* Pointer to the local heap information (if any) */
 107     WORD atomtable;   /* Pointer to the local atom table (if any) */
 108     WORD stacktop;    /* Top of the stack */
 109     WORD stackmin;    /* Lowest stack address used so far */
 110     WORD stackbottom; /* Bottom of the stack */
 111 } INSTANCEDATA;
 112
 113 /* relay entry points */
 114
 115 typedef struct
 116 {
 117     WORD   pushw_bp;               /* pushw %bp */
 118     BYTE   pushl;                  /* pushl $target */
 119     void  *target;
 120     WORD   call;                   /* call CALLFROM16 */
 121     short  callfrom16;
 122 } ENTRYPOINT16;
 123
 124 typedef struct
 125 {
 126     BYTE   pushl;                  /* pushl $relay */
 127     void  *relay;
 128     BYTE   lcall;                  /* lcall __FLATCS__:glue */
 129     void  *glue;
 130     WORD   flatcs;
 131     WORD   ret[5];                 /* return sequence */
 132     WORD   movl;                   /* movl arg_types[1],arg_types[0](%esi) */
 133     DWORD  arg_types[2];           /* type of each argument */
 134 } CALLFROM16;
 135
 136 /* THHOOK Kernel Data Structure */
 137 typedef struct _THHOOK
 138 {
 139     HANDLE16   hGlobalHeap;         /* 00 (handle BURGERMASTER) */
 140     WORD       pGlobalHeap;         /* 02 (selector BURGERMASTER) */
 141     HMODULE16  hExeHead;            /* 04 hFirstModule */
 142     HMODULE16  hExeSweep;           /* 06 (unused) */
 143     HANDLE16   TopPDB;              /* 08 (handle of KERNEL PDB) */
 144     HANDLE16   HeadPDB;             /* 0A (first PDB in list) */
 145     HANDLE16   TopSizePDB;          /* 0C (unused) */
 146     HTASK16    HeadTDB;             /* 0E hFirstTask */
 147     HTASK16    CurTDB;              /* 10 hCurrentTask */
 148     HTASK16    LoadTDB;             /* 12 (unused) */
 149     HTASK16    LockTDB;             /* 14 hLockedTask */
 150 } THHOOK;
 151
 152 extern LONG __wine_call_from_16(void);
 153 extern void __wine_call_from_16_regs(void);
 154
 155 extern THHOOK *pThhook;
 156
 157 #include "poppack.h"
 158
 159 #define NE_SEG_TABLE(pModule) \
 160     ((SEGTABLEENTRY *)((char *)(pModule) + (pModule)->ne_segtab))
 161
 162 #define NE_MODULE_NAME(pModule) \
 163     (((OFSTRUCT *)((char*)(pModule) + (pModule)->fileinfo))->szPathName)
 164
 165 #define NE_GET_DATA(pModule,offset,size) \
 166     ((const void *)(((offset)+(size) <= pModule->mapping_size) ? \
 167                     (const char *)pModule->mapping + (offset) : NULL))
 168
 169 #define NE_READ_DATA(pModule,buffer,offset,size) \
 170     (((offset)+(size) <= pModule->mapping_size) ? \
 171      (memcpy( buffer, (const char *)pModule->mapping + (offset), (size) ), TRUE) : FALSE)
 172
 173 /* push bytes on the 16-bit stack of a thread; return a segptr to the first pushed byte */
 174 static inline SEGPTR stack16_push( int size )
 175 {
 176     STACK16FRAME *frame = CURRENT_STACK16;
 177     memmove( (char*)frame - size, frame, sizeof(*frame) );
 178     CURRENT_SP -= size;
 179     return MAKESEGPTR( CURRENT_SS, CURRENT_SP + sizeof(*frame) );
 180 }
 181
 182 /* pop bytes from the 16-bit stack of a thread */
 183 static inline void stack16_pop( int size )
 184 {
 185     STACK16FRAME *frame = CURRENT_STACK16;
 186     memmove( (char*)frame + size, frame, sizeof(*frame) );
 187     CURRENT_SP += size;
 188 }
 189
 190 /* dosmem.c */
 191 extern BOOL   DOSMEM_Init(void);
 192 extern BOOL   DOSMEM_InitDosMemory(void);
 193 extern LPVOID DOSMEM_MapRealToLinear(DWORD); /* real-mode to linear */
 194 extern LPVOID DOSMEM_MapDosToLinear(UINT);   /* linear DOS to Wine */
 195 extern UINT   DOSMEM_MapLinearToDos(LPVOID); /* linear Wine to DOS */
 196 extern BOOL   DOSMEM_MapDosLayout(void);
 197 extern LPVOID DOSMEM_AllocBlock(UINT size, WORD* p);
 198 extern BOOL   DOSMEM_FreeBlock(void* ptr);
 199 extern UINT   DOSMEM_ResizeBlock(void* ptr, UINT size, BOOL exact);
 200 extern UINT   DOSMEM_Available(void);
 201
 202 /* global16.c */
 203 extern HGLOBAL16 GLOBAL_CreateBlock( UINT16 flags, void *ptr, DWORD size,
 204                                      HGLOBAL16 hOwner, unsigned char selflags );
 205 extern BOOL16 GLOBAL_FreeBlock( HGLOBAL16 handle );
 206 extern BOOL16 GLOBAL_MoveBlock( HGLOBAL16 handle, void *ptr, DWORD size );
 207 extern HGLOBAL16 GLOBAL_Alloc( WORD flags, DWORD size, HGLOBAL16 hOwner, unsigned char selflags );
 208
 209 /* instr.c */
 210 extern DWORD __wine_emulate_instruction( EXCEPTION_RECORD *rec, CONTEXT *context );
 211 extern LONG CALLBACK INSTR_vectored_handler( EXCEPTION_POINTERS *ptrs );
 212
 213 /* ne_module.c */
 214 extern NE_MODULE *NE_GetPtr( HMODULE16 hModule );
 215 extern WORD NE_GetOrdinal( HMODULE16 hModule, const char *name );
 216 extern FARPROC16 WINAPI NE_GetEntryPoint( HMODULE16 hModule, WORD ordinal );
 217 extern FARPROC16 NE_GetEntryPointEx( HMODULE16 hModule, WORD ordinal, BOOL16 snoop );
 218 extern BOOL16 NE_SetEntryPoint( HMODULE16 hModule, WORD ordinal, WORD offset );
 219 extern DWORD NE_StartTask(void);
 220
 221 /* ne_segment.c */
 222 extern BOOL NE_LoadSegment( NE_MODULE *pModule, WORD segnum );
 223 extern BOOL NE_LoadAllSegments( NE_MODULE *pModule );
 224 extern BOOL NE_CreateSegment( NE_MODULE *pModule, int segnum );
 225 extern BOOL NE_CreateAllSegments( NE_MODULE *pModule );
 226 extern HINSTANCE16 NE_GetInstance( NE_MODULE *pModule );
 227 extern void NE_InitializeDLLs( HMODULE16 hModule );
 228 extern void NE_DllProcessAttach( HMODULE16 hModule );
 229 extern void NE_CallUserSignalProc( HMODULE16 hModule, UINT16 code );
 230
 231 /* selector.c */
 232 #define LDT_SIZE 8192
 233 struct ldt_copy
 234 {
 235     void         *base[LDT_SIZE];
 236     unsigned int  limit[LDT_SIZE];
 237     unsigned char flags[LDT_SIZE];
 238 };
 239 extern const struct ldt_copy *ldt_copy;
 240
 241 #define LDT_FLAGS_DATA      0x13  /* Data segment */
 242 #define LDT_FLAGS_CODE      0x1b  /* Code segment */
 243 #define LDT_FLAGS_32BIT     0x40  /* Segment is 32-bit (code or stack) */
 244
 245 static inline void *ldt_get_base( WORD sel ) { return ldt_copy->base[sel >> 3]; }
 246 static inline unsigned int ldt_get_limit( WORD sel ) { return ldt_copy->limit[sel >> 3]; }
 247 static inline unsigned char ldt_get_flags( WORD sel ) { return ldt_copy->flags[sel >> 3]; }
 248
 249 extern void init_selectors(void);
 250 extern BOOL ldt_is_system( WORD sel );
 251 extern BOOL ldt_is_valid( WORD sel );
 252 extern void *ldt_get_ptr( WORD sel, DWORD offset );
 253 extern BOOL ldt_get_entry( WORD sel, LDT_ENTRY *entry );
 254 extern void ldt_set_entry( WORD sel, LDT_ENTRY entry );
 255 extern WORD SELECTOR_AllocBlock( const void *base, DWORD size, unsigned char flags );
 256 extern WORD SELECTOR_ReallocBlock( WORD sel, const void *base, DWORD size );
 257 extern void SELECTOR_FreeBlock( WORD sel );
 258 #define IS_SELECTOR_32BIT(sel) \
 259    (ldt_is_system(sel) || (ldt_copy->flags[LOWORD(sel) >> 3] & LDT_FLAGS_32BIT))
 260
 261 static inline WORD get_cs(void) { WORD res; __asm__( "movw %%cs,%0" : "=r" (res) ); return res; }
 262 static inline WORD get_ds(void) { WORD res; __asm__( "movw %%ds,%0" : "=r" (res) ); return res; }
 263 static inline WORD get_fs(void) { WORD res; __asm__( "movw %%fs,%0" : "=r" (res) ); return res; }
 264 static inline WORD get_gs(void) { WORD res; __asm__( "movw %%gs,%0" : "=r" (res) ); return res; }
 265
 266 /* relay16.c */
 267 extern int relay_call_from_16( void *entry_point, unsigned char *args16, CONTEXT *context );
 268 extern void RELAY16_InitDebugLists(void);
 269
 270 /* snoop16.c */
 271 extern void SNOOP16_RegisterDLL(HMODULE16,LPCSTR);
 272 extern FARPROC16 SNOOP16_GetProcAddress16(HMODULE16,DWORD,FARPROC16);
 273 extern BOOL SNOOP16_ShowDebugmsgSnoop(const char *dll,int ord,const char *fname);
 274
 275 /* syslevel.c */
 276 extern VOID SYSLEVEL_CheckNotLevel( INT level );
 277
 278 /* task.c */
 279 extern void TASK_CreateMainTask(void);
 280 extern HTASK16 TASK_SpawnTask( NE_MODULE *pModule, WORD cmdShow,
 281                                LPCSTR cmdline, BYTE len, HANDLE *hThread );
 282 extern void TASK_ExitTask(void);
 283 extern HTASK16 TASK_GetTaskFromThread( DWORD thread );
 284 extern TDB *TASK_GetCurrent(void);
 285 extern void TASK_InstallTHHook( THHOOK *pNewThook );
 286
 287 extern BOOL WOWTHUNK_Init(void);
 288
 289 extern WORD DOSMEM_0000H;
 290 extern WORD DOSMEM_BiosDataSeg;
 291 extern WORD DOSMEM_BiosSysSeg;
 292 extern DWORD CallTo16_DataSelector;
 293 extern DWORD CallTo16_TebSelector;
 294
 295 extern WORD cbclient_selector;
 296 extern WORD cbclientex_selector;
 297
 298 struct tagSYSLEVEL;
 299
 300 struct kernel_thread_data
 301 {
 302     SEGPTR              stack;          /* 16-bit stack pointer */
 303     WORD                stack_sel;      /* 16-bit stack selector */
 304     WORD                htask16;        /* Win16 task handle */
 305     DWORD               sys_count[4];   /* syslevel mutex entry counters */
 306     struct tagSYSLEVEL *sys_mutex[4];   /* syslevel mutex pointers */
 307 };
 308
 309 C_ASSERT( sizeof(struct kernel_thread_data) <= sizeof(((TEB *)0)->SystemReserved1) );
 310
 311 static inline struct kernel_thread_data *kernel_get_thread_data(void)
 312 {
 313     return (struct kernel_thread_data *)NtCurrentTeb()->SystemReserved1;
 314 }
 315
 316 /* Push a DWORD on the 32-bit stack */
 317 static inline void stack32_push( CONTEXT *context, DWORD val )
 318 {
 319     context->Esp -= sizeof(DWORD);
 320     *(DWORD *)context->Esp = val;
 321 }
 322
 323 /* Pop a DWORD from the 32-bit stack */
 324 static inline DWORD stack32_pop( CONTEXT *context )
 325 {
 326     DWORD ret = *(DWORD *)context->Esp;
 327     context->Esp += sizeof(DWORD);
 328     return ret;
 329 }
 330
 331 #define DEFINE_REGS_ENTRYPOINT(name) \
 332     __ASM_STDCALL_FUNC( name, 0,                                        \
 333                         "pushl %ebp\n\t"                                \
 334                         __ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")       \
 335                         __ASM_CFI(".cfi_rel_offset %ebp,0\n\t")         \
 336                         "movl %esp,%ebp\n\t"                            \
 337                         __ASM_CFI(".cfi_def_cfa_register %ebp\n\t")     \
 338                         "leal -(0x2cc+4)(%esp),%esp\n\t"  /* sizeof(CONTEXT) + space for %eax */ \
 339                         "movl %eax,-4(%ebp)\n\t"                        \
 340                         "pushl %esp\n\t"             /* context */      \
 341                         "call " __ASM_STDCALL("RtlCaptureContext",4) "\n\t" \
 342                         "movl -4(%ebp),%eax\n\t"                        \
 343                         "movl %eax,0xb0(%esp)\n\t"   /* context->Eax */ \
 344                         "pushl %esp\n\t"             /* context */      \
 345                         "call " __ASM_STDCALL("__regs_" #name,4) "\n\t" \
 346                         "pushl %esp\n\t"             /* context */      \
 347                         "pushl $-2\n\t"   /* GetCurrentThread() */      \
 348                         "call " __ASM_STDCALL("NtSetContextThread",8) "\n\t" \
 349                         "ret" ) /* fake ret to make copy protections happy */
 350
 351 #endif  /* __WINE_KERNEL16_PRIVATE_H */