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wine/dlls/kernel/ne_segment.c
Jonathan Ernst 360a3f9142 Update the address of the Free Software Foundation.
2006-05-23 14:11:13 +02:00

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/*
* NE segment loading
*
* Copyright 1993 Robert J. Amstadt
* Copyright 1995 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <fcntl.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <ctype.h>
#include <string.h>
#include "wine/winbase16.h"
#include "wownt32.h"
#include "winternl.h"
#include "wine/library.h"
#include "kernel_private.h"
#include "kernel16_private.h"
#include "toolhelp.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(fixup);
WINE_DECLARE_DEBUG_CHANNEL(dll);
WINE_DECLARE_DEBUG_CHANNEL(module);
/*
* Relocation table entry
*/
struct relocation_entry_s
{
BYTE address_type; /* Relocation address type */
BYTE relocation_type; /* Relocation type */
WORD offset; /* Offset in segment to fixup */
WORD target1; /* Target specification */
WORD target2; /* Target specification */
};
/*
* Relocation address types
*/
#define NE_RADDR_LOWBYTE 0
#define NE_RADDR_SELECTOR 2
#define NE_RADDR_POINTER32 3
#define NE_RADDR_OFFSET16 5
#define NE_RADDR_POINTER48 11
#define NE_RADDR_OFFSET32 13
/*
* Relocation types
*/
#define NE_RELTYPE_INTERNAL 0
#define NE_RELTYPE_ORDINAL 1
#define NE_RELTYPE_NAME 2
#define NE_RELTYPE_OSFIXUP 3
#define NE_RELFLAG_ADDITIVE 4
/* Self-loading modules contain this structure in their first segment */
typedef struct
{
WORD version; /* Must be "A0" (0x3041) */
WORD reserved;
FARPROC16 BootApp; /* startup procedure */
FARPROC16 LoadAppSeg; /* procedure to load a segment */
FARPROC16 reserved2;
FARPROC16 MyAlloc; /* memory allocation procedure,
* wine must write this field */
FARPROC16 EntryAddrProc;
FARPROC16 ExitProc; /* exit procedure */
WORD reserved3[4];
FARPROC16 SetOwner; /* Set Owner procedure, exported by wine */
} SELFLOADHEADER;
#define SEL(x) ((x)|1)
static void NE_FixupSegmentPrologs(NE_MODULE *pModule, WORD segnum);
/***********************************************************************
* NE_GetRelocAddrName
*/
static const char *NE_GetRelocAddrName( BYTE addr_type, int additive )
{
switch(addr_type & 0x7f)
{
case NE_RADDR_LOWBYTE: return additive ? "BYTE add" : "BYTE";
case NE_RADDR_OFFSET16: return additive ? "OFFSET16 add" : "OFFSET16";
case NE_RADDR_POINTER32: return additive ? "POINTER32 add" : "POINTER32";
case NE_RADDR_SELECTOR: return additive ? "SELECTOR add" : "SELECTOR";
case NE_RADDR_POINTER48: return additive ? "POINTER48 add" : "POINTER48";
case NE_RADDR_OFFSET32: return additive ? "OFFSET32 add" : "OFFSET32";
}
return "???";
}
/***********************************************************************
* NE_OpenFile
*/
static HFILE16 NE_OpenFile( NE_MODULE *pModule )
{
char *name = NE_MODULE_NAME( pModule );
HANDLE handle = CreateFileA( name, GENERIC_READ, FILE_SHARE_READ,
NULL, OPEN_EXISTING, 0, 0 );
if (handle == INVALID_HANDLE_VALUE)
{
ERR( "Can't open file '%s' for module %04x\n", name, pModule->self );
return HFILE_ERROR;
}
return Win32HandleToDosFileHandle( handle );
}
/***********************************************************************
* apply_relocations
*
* Apply relocations to a segment. Helper for NE_LoadSegment.
*/
static inline BOOL apply_relocations( NE_MODULE *pModule, const struct relocation_entry_s *rep,
int count, int segnum )
{
BYTE *func_name;
char buffer[256];
int i, ordinal;
WORD offset, *sp;
HMODULE16 module;
FARPROC16 address = 0;
HMODULE16 *pModuleTable = (HMODULE16 *)((char *)pModule + pModule->ne_modtab);
SEGTABLEENTRY *pSegTable = NE_SEG_TABLE( pModule );
SEGTABLEENTRY *pSeg = pSegTable + segnum - 1;
/*
* Go through the relocation table one entry at a time.
*/
for (i = 0; i < count; i++, rep++)
{
/*
* Get the target address corresponding to this entry.
*/
/* If additive, there is no target chain list. Instead, add source
and target */
int additive = rep->relocation_type & NE_RELFLAG_ADDITIVE;
switch (rep->relocation_type & 3)
{
case NE_RELTYPE_ORDINAL:
module = pModuleTable[rep->target1-1];
ordinal = rep->target2;
address = NE_GetEntryPoint( module, ordinal );
if (!address)
{
NE_MODULE *pTarget = NE_GetPtr( module );
if (!pTarget)
WARN_(module)("Module not found: %04x, reference %d of module %*.*s\n",
module, rep->target1,
*((BYTE *)pModule + pModule->ne_restab),
*((BYTE *)pModule + pModule->ne_restab),
(char *)pModule + pModule->ne_restab + 1 );
else
{
ERR("No implementation for %.*s.%d, setting to 0xdeadbeef\n",
*((BYTE *)pTarget + pTarget->ne_restab),
(char *)pTarget + pTarget->ne_restab + 1,
ordinal );
address = (FARPROC16)0xdeadbeef;
}
}
if (TRACE_ON(fixup))
{
NE_MODULE *pTarget = NE_GetPtr( module );
TRACE("%d: %.*s.%d=%04x:%04x %s\n", i + 1,
*((BYTE *)pTarget + pTarget->ne_restab),
(char *)pTarget + pTarget->ne_restab + 1,
ordinal, HIWORD(address), LOWORD(address),
NE_GetRelocAddrName( rep->address_type, additive ) );
}
break;
case NE_RELTYPE_NAME:
module = pModuleTable[rep->target1-1];
func_name = (BYTE *)pModule + pModule->ne_imptab + rep->target2;
memcpy( buffer, func_name+1, *func_name );
buffer[*func_name] = '\0';
ordinal = NE_GetOrdinal( module, buffer );
address = NE_GetEntryPoint( module, ordinal );
if (ERR_ON(fixup) && !address)
{
NE_MODULE *pTarget = NE_GetPtr( module );
ERR("No implementation for %.*s.%s, setting to 0xdeadbeef\n",
*((BYTE *)pTarget + pTarget->ne_restab),
(char *)pTarget + pTarget->ne_restab + 1, buffer );
}
if (!address) address = (FARPROC16) 0xdeadbeef;
if (TRACE_ON(fixup))
{
NE_MODULE *pTarget = NE_GetPtr( module );
TRACE("%d: %.*s.%s=%04x:%04x %s\n", i + 1,
*((BYTE *)pTarget + pTarget->ne_restab),
(char *)pTarget + pTarget->ne_restab + 1,
buffer, HIWORD(address), LOWORD(address),
NE_GetRelocAddrName( rep->address_type, additive ) );
}
break;
case NE_RELTYPE_INTERNAL:
if ((rep->target1 & 0xff) == 0xff)
{
address = NE_GetEntryPoint( pModule->self, rep->target2 );
}
else
{
address = (FARPROC16)MAKESEGPTR( SEL(pSegTable[rep->target1-1].hSeg), rep->target2 );
}
TRACE("%d: %04x:%04x %s\n",
i + 1, HIWORD(address), LOWORD(address),
NE_GetRelocAddrName( rep->address_type, additive ) );
break;
case NE_RELTYPE_OSFIXUP:
/* Relocation type 7:
*
* These appear to be used as fixups for the Windows
* floating point emulator. Let's just ignore them and
* try to use the hardware floating point. Linux should
* successfully emulate the coprocessor if it doesn't
* exist.
*/
TRACE("%d: TYPE %d, OFFSET %04x, TARGET %04x %04x %s\n",
i + 1, rep->relocation_type, rep->offset,
rep->target1, rep->target2,
NE_GetRelocAddrName( rep->address_type, additive ) );
continue;
}
offset = rep->offset;
/* Apparently, high bit of address_type is sometimes set; */
/* we ignore it for now */
if (rep->address_type > NE_RADDR_OFFSET32)
{
char module[10];
GetModuleName16( pModule->self, module, sizeof(module) );
ERR("WARNING: module %s: unknown reloc addr type = 0x%02x. Please report.\n",
module, rep->address_type );
}
if (additive)
{
sp = MapSL( MAKESEGPTR( SEL(pSeg->hSeg), offset ) );
TRACE(" %04x:%04x\n", offset, *sp );
switch (rep->address_type & 0x7f)
{
case NE_RADDR_LOWBYTE:
*(BYTE *)sp += LOBYTE((int)address);
break;
case NE_RADDR_OFFSET16:
*sp += LOWORD(address);
break;
case NE_RADDR_POINTER32:
*sp += LOWORD(address);
*(sp+1) = HIWORD(address);
break;
case NE_RADDR_SELECTOR:
/* Borland creates additive records with offset zero. Strange, but OK */
if (*sp)
ERR("Additive selector to %04x.Please report\n",*sp);
else
*sp = HIWORD(address);
break;
default:
goto unknown;
}
}
else /* non-additive fixup */
{
do
{
WORD next_offset;
sp = MapSL( MAKESEGPTR( SEL(pSeg->hSeg), offset ) );
next_offset = *sp;
TRACE(" %04x:%04x\n", offset, *sp );
switch (rep->address_type & 0x7f)
{
case NE_RADDR_LOWBYTE:
*(BYTE *)sp = LOBYTE((int)address);
break;
case NE_RADDR_OFFSET16:
*sp = LOWORD(address);
break;
case NE_RADDR_POINTER32:
*(FARPROC16 *)sp = address;
break;
case NE_RADDR_SELECTOR:
*sp = SELECTOROF(address);
break;
default:
goto unknown;
}
if (next_offset == offset) break; /* avoid infinite loop */
if (next_offset >= GlobalSize16(pSeg->hSeg)) break;
offset = next_offset;
} while (offset != 0xffff);
}
}
return TRUE;
unknown:
WARN("WARNING: %d: unknown ADDR TYPE %d, "
"TYPE %d, OFFSET %04x, TARGET %04x %04x\n",
i + 1, rep->address_type, rep->relocation_type,
rep->offset, rep->target1, rep->target2);
return FALSE;
}
/***********************************************************************
* NE_LoadSegment
*/
BOOL NE_LoadSegment( NE_MODULE *pModule, WORD segnum )
{
WORD count;
DWORD pos;
const struct relocation_entry_s *rep;
int size;
SEGTABLEENTRY *pSegTable = NE_SEG_TABLE( pModule );
SEGTABLEENTRY *pSeg = pSegTable + segnum - 1;
if (pSeg->flags & NE_SEGFLAGS_LOADED)
{
/* self-loader ? -> already loaded it */
if (pModule->ne_flags & NE_FFLAGS_SELFLOAD)
return TRUE;
/* leave, except for DGROUP, as this may be the second instance */
if (segnum != pModule->ne_autodata)
return TRUE;
}
if (!pSeg->filepos) return TRUE; /* No file image, just return */
TRACE_(module)("Loading segment %d, hSeg=%04x, flags=%04x\n",
segnum, pSeg->hSeg, pSeg->flags );
pos = pSeg->filepos << pModule->ne_align;
if (pSeg->size) size = pSeg->size;
else size = pSeg->minsize ? pSeg->minsize : 0x10000;
if (pModule->ne_flags & NE_FFLAGS_SELFLOAD && segnum > 1)
{
/* Implement self-loading segments */
SELFLOADHEADER *selfloadheader;
void *oldstack;
HFILE16 hFile16;
WORD args[3];
DWORD ret;
selfloadheader = MapSL( MAKESEGPTR(SEL(pSegTable->hSeg),0) );
oldstack = NtCurrentTeb()->WOW32Reserved;
NtCurrentTeb()->WOW32Reserved = (void *)MAKESEGPTR(pModule->self_loading_sel,
0xff00 - sizeof(STACK16FRAME));
hFile16 = NE_OpenFile( pModule );
TRACE_(dll)("Call LoadAppSegProc(hmodule=0x%04x,hf=%x,segnum=%d)\n",
pModule->self,hFile16,segnum );
args[2] = pModule->self;
args[1] = hFile16;
args[0] = segnum;
WOWCallback16Ex( (DWORD)selfloadheader->LoadAppSeg, WCB16_PASCAL, sizeof(args), args, &ret );
pSeg->hSeg = LOWORD(ret);
TRACE_(dll)("Ret LoadAppSegProc: hSeg=0x%04x\n", pSeg->hSeg);
_lclose16( hFile16 );
NtCurrentTeb()->WOW32Reserved = oldstack;
pSeg->flags |= NE_SEGFLAGS_LOADED;
return TRUE;
}
else if (!(pSeg->flags & NE_SEGFLAGS_ITERATED))
{
void *mem = GlobalLock16(pSeg->hSeg);
if (!NE_READ_DATA( pModule, mem, pos, size ))
return FALSE;
pos += size;
}
else
{
/*
The following bit of code for "iterated segments" was written without
any documentation on the format of these segments. It seems to work,
but may be missing something.
*/
const char *buff = NE_GET_DATA( pModule, pos, size );
const char* curr = buff;
char *mem = GlobalLock16(pSeg->hSeg);
pos += size;
if (buff == NULL) return FALSE;
while(curr < buff + size) {
unsigned int rept = ((short*)curr)[0];
unsigned int len = ((short*)curr)[1];
curr += 2*sizeof(short);
while (rept--)
{
memcpy( mem, curr, len );
mem += len;
}
curr += len;
}
}
pSeg->flags |= NE_SEGFLAGS_LOADED;
/* Perform exported function prolog fixups */
NE_FixupSegmentPrologs( pModule, segnum );
if (!(pSeg->flags & NE_SEGFLAGS_RELOC_DATA))
return TRUE; /* No relocation data, we are done */
if (!NE_READ_DATA( pModule, &count, pos, sizeof(count) ) || !count) return TRUE;
pos += sizeof(count);
TRACE("Fixups for %.*s, segment %d, hSeg %04x\n",
*((BYTE *)pModule + pModule->ne_restab),
(char *)pModule + pModule->ne_restab + 1,
segnum, pSeg->hSeg );
if (!(rep = NE_GET_DATA( pModule, pos, count * sizeof(struct relocation_entry_s) )))
return FALSE;
return apply_relocations( pModule, rep, count, segnum );
}
/***********************************************************************
* NE_LoadAllSegments
*/
BOOL NE_LoadAllSegments( NE_MODULE *pModule )
{
int i;
SEGTABLEENTRY * pSegTable = (SEGTABLEENTRY *) NE_SEG_TABLE(pModule);
if (pModule->ne_flags & NE_FFLAGS_SELFLOAD)
{
HFILE16 hFile16;
HGLOBAL16 sel;
/* Handle self-loading modules */
SELFLOADHEADER *selfloadheader;
HMODULE16 mod = GetModuleHandle16("KERNEL");
void *oldstack;
WORD args[2];
TRACE_(module)("%.*s is a self-loading module!\n",
*((BYTE*)pModule + pModule->ne_restab),
(char *)pModule + pModule->ne_restab + 1);
if (!NE_LoadSegment( pModule, 1 )) return FALSE;
selfloadheader = MapSL( MAKESEGPTR(SEL(pSegTable->hSeg), 0) );
selfloadheader->EntryAddrProc = GetProcAddress16(mod,"EntryAddrProc");
selfloadheader->MyAlloc = GetProcAddress16(mod,"MyAlloc");
selfloadheader->SetOwner = GetProcAddress16(mod,"FarSetOwner");
sel = GlobalAlloc16( GMEM_ZEROINIT, 0xFF00 );
pModule->self_loading_sel = SEL(sel);
FarSetOwner16( sel, pModule->self );
oldstack = NtCurrentTeb()->WOW32Reserved;
NtCurrentTeb()->WOW32Reserved = (void *)MAKESEGPTR(pModule->self_loading_sel,
0xff00 - sizeof(STACK16FRAME) );
hFile16 = NE_OpenFile(pModule);
TRACE_(dll)("CallBootAppProc(hModule=0x%04x,hf=0x%04x)\n",
pModule->self,hFile16);
args[1] = pModule->self;
args[0] = hFile16;
WOWCallback16Ex( (DWORD)selfloadheader->BootApp, WCB16_PASCAL, sizeof(args), args, NULL );
TRACE_(dll)("Return from CallBootAppProc\n");
_lclose16(hFile16);
NtCurrentTeb()->WOW32Reserved = oldstack;
for (i = 2; i <= pModule->ne_cseg; i++)
if (!NE_LoadSegment( pModule, i )) return FALSE;
}
else
{
for (i = 1; i <= pModule->ne_cseg; i++)
if (!NE_LoadSegment( pModule, i )) return FALSE;
}
return TRUE;
}
/***********************************************************************
* NE_FixupSegmentPrologs
*
* Fixup exported functions prologs of one segment
*/
static void NE_FixupSegmentPrologs(NE_MODULE *pModule, WORD segnum)
{
SEGTABLEENTRY *pSegTable = NE_SEG_TABLE( pModule );
ET_BUNDLE *bundle;
ET_ENTRY *entry;
WORD dgroup, num_entries, sel = SEL(pSegTable[segnum-1].hSeg);
BYTE *pSeg, *pFunc;
TRACE("(%d);\n", segnum);
if (pSegTable[segnum-1].flags & NE_SEGFLAGS_DATA)
{
pSegTable[segnum-1].flags |= NE_SEGFLAGS_LOADED;
return;
}
if (!pModule->ne_autodata) return;
if (!(dgroup = SEL(pSegTable[pModule->ne_autodata-1].hSeg))) return;
pSeg = MapSL( MAKESEGPTR(sel, 0) );
bundle = (ET_BUNDLE *)((BYTE *)pModule+pModule->ne_enttab);
do {
TRACE("num_entries: %d, bundle: %p, next: %04x, pSeg: %p\n", bundle->last - bundle->first, bundle, bundle->next, pSeg);
if (!(num_entries = bundle->last - bundle->first))
return;
entry = (ET_ENTRY *)((BYTE *)bundle+6);
while (num_entries--)
{
/*TRACE("entry: %p, entry->segnum: %d, entry->offs: %04x\n", entry, entry->segnum, entry->offs);*/
if (entry->segnum == segnum)
{
pFunc = ((BYTE *)pSeg+entry->offs);
TRACE("pFunc: %p, *(DWORD *)pFunc: %08lx, num_entries: %d\n", pFunc, *(DWORD *)pFunc, num_entries);
if (*(pFunc+2) == 0x90)
{
if (*(WORD *)pFunc == 0x581e) /* push ds, pop ax */
{
TRACE("patch %04x:%04x -> mov ax, ds\n", sel, entry->offs);
*(WORD *)pFunc = 0xd88c; /* mov ax, ds */
}
if (*(WORD *)pFunc == 0xd88c)
{
if ((entry->flags & 2)) /* public data ? */
{
TRACE("patch %04x:%04x -> mov ax, dgroup [%04x]\n", sel, entry->offs, dgroup);
*pFunc = 0xb8; /* mov ax, */
*(WORD *)(pFunc+1) = dgroup;
}
else if ((pModule->ne_flags & NE_FFLAGS_MULTIPLEDATA)
&& (entry->flags & 1)) /* exported ? */
{
TRACE("patch %04x:%04x -> nop, nop\n", sel, entry->offs);
*(WORD *)pFunc = 0x9090; /* nop, nop */
}
}
}
}
entry++;
}
} while ( (bundle->next) && (bundle = ((ET_BUNDLE *)((BYTE *)pModule + bundle->next))) );
}
/***********************************************************************
* PatchCodeHandle (KERNEL.110)
*
* Needed for self-loading modules.
*/
DWORD WINAPI PatchCodeHandle16(HANDLE16 hSeg)
{
WORD segnum;
WORD sel = SEL(hSeg);
NE_MODULE *pModule = NE_GetPtr(FarGetOwner16(sel));
SEGTABLEENTRY *pSegTable = NE_SEG_TABLE(pModule);
TRACE_(module)("(%04x);\n", hSeg);
/* find the segment number of the module that belongs to hSeg */
for (segnum = 1; segnum <= pModule->ne_cseg; segnum++)
{
if (SEL(pSegTable[segnum-1].hSeg) == sel)
{
NE_FixupSegmentPrologs(pModule, segnum);
break;
}
}
return MAKELONG(hSeg, sel);
}
/***********************************************************************
* NE_GetDLLInitParams
*/
static VOID NE_GetDLLInitParams( NE_MODULE *pModule,
WORD *hInst, WORD *ds, WORD *heap )
{
SEGTABLEENTRY *pSegTable = NE_SEG_TABLE( pModule );
if (!(pModule->ne_flags & NE_FFLAGS_SINGLEDATA))
{
if (pModule->ne_flags & NE_FFLAGS_MULTIPLEDATA || pModule->ne_autodata)
{
/* Not SINGLEDATA */
ERR_(dll)("Library is not marked SINGLEDATA\n");
exit(1);
}
else /* DATA NONE DLL */
{
*ds = 0;
*heap = 0;
}
}
else /* DATA SINGLE DLL */
{
if (pModule->ne_autodata) {
*ds = SEL(pSegTable[pModule->ne_autodata-1].hSeg);
*heap = pModule->ne_heap;
}
else /* hmm, DLL has no dgroup,
but why has it NE_FFLAGS_SINGLEDATA set ?
Buggy DLL compiler ? */
{
*ds = 0;
*heap = 0;
}
}
*hInst = *ds ? GlobalHandle16(*ds) : pModule->self;
}
/***********************************************************************
* NE_InitDLL
*
* Call the DLL initialization code
*/
static BOOL NE_InitDLL( NE_MODULE *pModule )
{
SEGTABLEENTRY *pSegTable;
WORD hInst, ds, heap;
CONTEXT86 context;
pSegTable = NE_SEG_TABLE( pModule );
if (!(pModule->ne_flags & NE_FFLAGS_LIBMODULE) ||
(pModule->ne_flags & NE_FFLAGS_WIN32)) return TRUE; /*not a library*/
/* Call USER signal handler for Win3.1 compatibility. */
NE_CallUserSignalProc( pModule->self, USIG16_DLL_LOAD );
if (!SELECTOROF(pModule->ne_csip)) return TRUE; /* no initialization code */
/* Registers at initialization must be:
* cx heap size
* di library instance
* ds data segment if any
* es:si command line (always 0)
*/
memset( &context, 0, sizeof(context) );
NE_GetDLLInitParams( pModule, &hInst, &ds, &heap );
context.Ecx = heap;
context.Edi = hInst;
context.SegDs = ds;
context.SegEs = ds; /* who knows ... */
context.SegFs = wine_get_fs();
context.SegGs = wine_get_gs();
context.SegCs = SEL(pSegTable[SELECTOROF(pModule->ne_csip)-1].hSeg);
context.Eip = OFFSETOF(pModule->ne_csip);
context.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + (WORD)&((STACK16FRAME*)0)->bp;
pModule->ne_csip = 0; /* Don't initialize it twice */
TRACE_(dll)("Calling LibMain for %.*s, cs:ip=%04lx:%04lx ds=%04lx di=%04x cx=%04x\n",
*((BYTE*)pModule + pModule->ne_restab),
(char *)pModule + pModule->ne_restab + 1,
context.SegCs, context.Eip, context.SegDs,
LOWORD(context.Edi), LOWORD(context.Ecx) );
WOWCallback16Ex( 0, WCB16_REGS, 0, NULL, (DWORD *)&context );
return TRUE;
}
/***********************************************************************
* NE_InitializeDLLs
*
* Recursively initialize all DLLs (according to the order in which
* they where loaded).
*/
void NE_InitializeDLLs( HMODULE16 hModule )
{
NE_MODULE *pModule;
HMODULE16 *pDLL;
if (!(pModule = NE_GetPtr( hModule ))) return;
assert( !(pModule->ne_flags & NE_FFLAGS_WIN32) );
if (pModule->dlls_to_init)
{
HGLOBAL16 to_init = pModule->dlls_to_init;
pModule->dlls_to_init = 0;
for (pDLL = (HMODULE16 *)GlobalLock16( to_init ); *pDLL; pDLL++)
{
NE_InitializeDLLs( *pDLL );
}
GlobalFree16( to_init );
}
NE_InitDLL( pModule );
}
/**********************************************************************
* NE_CallUserSignalProc
*
* According to "Undocumented Windows", the task signal proc is
* bypassed for module load/unload notifications, and the USER signal
* proc is called directly instead. This is what this function does.
*/
typedef DWORD (WINAPI *pSignalProc)( HANDLE16 module, UINT16 code, UINT16 exit,
HINSTANCE16 inst, HQUEUE16 queue );
void NE_CallUserSignalProc( HMODULE16 hModule, UINT16 code )
{
FARPROC16 proc;
HMODULE16 user = GetModuleHandle16("user.exe");
if (!user) return;
if ((proc = GetProcAddress16( user, "SignalProc" )))
{
/* USER is always a builtin dll */
pSignalProc sigproc = (pSignalProc)((ENTRYPOINT16 *)MapSL( (SEGPTR)proc ))->target;
sigproc( hModule, code, 0, 0, 0 );
}
}
/***********************************************************************
* NE_CallDllEntryPoint
*
* Call the DllEntryPoint of DLLs with subsystem >= 4.0
*/
typedef DWORD (WINAPI *WinNEEntryProc)(DWORD,WORD,WORD,WORD,DWORD,WORD);
static void NE_CallDllEntryPoint( NE_MODULE *pModule, DWORD dwReason )
{
WORD hInst, ds, heap;
FARPROC16 entryPoint;
if (!(pModule->ne_flags & NE_FFLAGS_LIBMODULE)) return;
if (!(pModule->ne_flags & NE_FFLAGS_BUILTIN) && pModule->ne_expver < 0x0400) return;
if (!(entryPoint = GetProcAddress16( pModule->self, "DllEntryPoint" ))) return;
NE_GetDLLInitParams( pModule, &hInst, &ds, &heap );
TRACE_(dll)( "Calling %s DllEntryPoint, cs:ip=%04x:%04x\n",
NE_MODULE_NAME( pModule ),
SELECTOROF(entryPoint), OFFSETOF(entryPoint) );
if ( pModule->ne_flags & NE_FFLAGS_BUILTIN )
{
WinNEEntryProc entryProc = (WinNEEntryProc)((ENTRYPOINT16 *)MapSL( (SEGPTR)entryPoint ))->target;
entryProc( dwReason, hInst, ds, heap, 0, 0 );
}
else
{
CONTEXT86 context;
WORD args[8];
memset( &context, 0, sizeof(context) );
context.SegDs = ds;
context.SegEs = ds; /* who knows ... */
context.SegFs = wine_get_fs();
context.SegGs = wine_get_gs();
context.SegCs = HIWORD(entryPoint);
context.Eip = LOWORD(entryPoint);
context.Ebp = OFFSETOF(NtCurrentTeb()->WOW32Reserved) + (WORD)&((STACK16FRAME*)0)->bp;
args[7] = HIWORD(dwReason);
args[6] = LOWORD(dwReason);
args[5] = hInst;
args[4] = ds;
args[3] = heap;
args[2] = 0; /* HIWORD(dwReserved1) */
args[1] = 0; /* LOWORD(dwReserved1) */
args[0] = 0; /* wReserved2 */
WOWCallback16Ex( 0, WCB16_REGS, sizeof(args), args, (DWORD *)&context );
}
}
/***********************************************************************
* NE_DllProcessAttach
*
* Call the DllEntryPoint of all modules this one (recursively)
* depends on, according to the order in which they were loaded.
*
* Note that --as opposed to the PE module case-- there is no notion
* of 'module loaded into a process' for NE modules, and hence we
* have no place to store the fact that the DllEntryPoint of a
* given module was already called on behalf of this process (e.g.
* due to some earlier LoadLibrary16 call).
*
* Thus, we just call the DllEntryPoint twice in that case. Win9x
* appears to behave this way as well ...
*
* This routine must only be called with the Win16Lock held.
*
* FIXME: We should actually abort loading in case the DllEntryPoint
* returns FALSE ...
*
*/
struct ne_init_list
{
int count;
int size;
NE_MODULE **module;
};
static void add_to_init_list( struct ne_init_list *list, NE_MODULE *hModule )
{
NE_MODULE **newModule = NULL;
if ( list->count == list->size )
{
int newSize = list->size + 128;
if (list->module)
newModule = HeapReAlloc( GetProcessHeap(), 0,
list->module, newSize*sizeof(NE_MODULE *) );
else
newModule = HeapAlloc( GetProcessHeap(), 0,
newSize*sizeof(NE_MODULE *) );
if ( !newModule )
{
FIXME_(dll)("Out of memory!\n");
return;
}
list->module = newModule;
list->size = newSize;
}
list->module[list->count++] = hModule;
}
static void free_init_list( struct ne_init_list *list )
{
if ( list->module )
{
HeapFree( GetProcessHeap(), 0, list->module );
memset( list, 0, sizeof(*list) );
}
}
static void fill_init_list( struct ne_init_list *list, HMODULE16 hModule )
{
NE_MODULE *pModule;
HMODULE16 *pModRef;
int i;
if (!(pModule = NE_GetPtr( hModule ))) return;
assert( !(pModule->ne_flags & NE_FFLAGS_WIN32) );
/* Never add a module twice */
for ( i = 0; i < list->count; i++ )
if ( list->module[i] == pModule )
return;
/* Check for recursive call */
if ( pModule->ne_flagsothers & 0x80 ) return;
TRACE_(dll)("(%s) - START\n", NE_MODULE_NAME(pModule) );
/* Tag current module to prevent recursive loop */
pModule->ne_flagsothers |= 0x80;
/* Recursively attach all DLLs this one depends on */
pModRef = (HMODULE16 *)((char *)pModule + pModule->ne_modtab);
for ( i = 0; i < pModule->ne_cmod; i++ )
if ( pModRef[i] ) fill_init_list( list, pModRef[i] );
/* Add current module */
add_to_init_list( list, pModule );
/* Remove recursion flag */
pModule->ne_flagsothers &= ~0x80;
TRACE_(dll)("(%s) - END\n", NE_MODULE_NAME(pModule) );
}
static void call_init_list( struct ne_init_list *list )
{
int i;
for ( i = 0; i < list->count; i++ )
NE_CallDllEntryPoint( list->module[i], DLL_PROCESS_ATTACH );
}
void NE_DllProcessAttach( HMODULE16 hModule )
{
struct ne_init_list list;
memset( &list, 0, sizeof(list) );
fill_init_list( &list, hModule );
call_init_list( &list );
free_init_list( &list );
}
/***********************************************************************
* NE_Ne2MemFlags
*
* This function translates NE segment flags to GlobalAlloc flags
*/
static WORD NE_Ne2MemFlags(WORD flags)
{
WORD memflags = 0;
#if 1
if (flags & NE_SEGFLAGS_DISCARDABLE)
memflags |= GMEM_DISCARDABLE;
if (flags & NE_SEGFLAGS_MOVEABLE ||
( ! (flags & NE_SEGFLAGS_DATA) &&
! (flags & NE_SEGFLAGS_LOADED) &&
! (flags & NE_SEGFLAGS_ALLOCATED)
)
)
memflags |= GMEM_MOVEABLE;
memflags |= GMEM_ZEROINIT;
#else
memflags = GMEM_ZEROINIT | GMEM_FIXED;
#endif
return memflags;
}
/***********************************************************************
* MyAlloc (KERNEL.668) Wine-specific export
*
* MyAlloc() function for self-loading apps.
*/
DWORD WINAPI MyAlloc16( WORD wFlags, WORD wSize, WORD wElem )
{
WORD size = wSize << wElem;
HANDLE16 hMem = 0;
if (wSize || (wFlags & NE_SEGFLAGS_MOVEABLE))
hMem = GlobalAlloc16( NE_Ne2MemFlags(wFlags), size);
if ( ((wFlags & 0x7) != 0x1) && /* DATA */
((wFlags & 0x7) != 0x7) ) /* DATA|ALLOCATED|LOADED */
{
WORD hSel = SEL(hMem);
WORD access = SelectorAccessRights16(hSel,0,0);
access |= 2<<2; /* SEGMENT_CODE */
SelectorAccessRights16(hSel,1,access);
}
if (size)
return MAKELONG( hMem, SEL(hMem) );
else
return MAKELONG( 0, hMem );
}
/***********************************************************************
* NE_GetInstance
*/
HINSTANCE16 NE_GetInstance( NE_MODULE *pModule )
{
if ( !pModule->ne_autodata )
return pModule->self;
else
{
SEGTABLEENTRY *pSeg;
pSeg = NE_SEG_TABLE( pModule ) + pModule->ne_autodata - 1;
return pSeg->hSeg;
}
}
/***********************************************************************
* NE_CreateSegment
*/
BOOL NE_CreateSegment( NE_MODULE *pModule, int segnum )
{
SEGTABLEENTRY *pSeg = NE_SEG_TABLE( pModule ) + segnum - 1;
int minsize;
unsigned char selflags;
assert( !(pModule->ne_flags & NE_FFLAGS_WIN32) );
if ( segnum < 1 || segnum > pModule->ne_cseg )
return FALSE;
if ( (pModule->ne_flags & NE_FFLAGS_SELFLOAD) && segnum != 1 )
return TRUE; /* selfloader allocates segment itself */
if ( (pSeg->flags & NE_SEGFLAGS_ALLOCATED) && segnum != pModule->ne_autodata )
return TRUE; /* all but DGROUP only allocated once */
minsize = pSeg->minsize ? pSeg->minsize : 0x10000;
if ( segnum == SELECTOROF(pModule->ne_sssp) ) minsize += pModule->ne_stack;
if ( segnum == pModule->ne_autodata ) minsize += pModule->ne_heap;
selflags = (pSeg->flags & NE_SEGFLAGS_DATA) ? WINE_LDT_FLAGS_DATA : WINE_LDT_FLAGS_CODE;
if (pSeg->flags & NE_SEGFLAGS_32BIT) selflags |= WINE_LDT_FLAGS_32BIT;
pSeg->hSeg = GLOBAL_Alloc( NE_Ne2MemFlags(pSeg->flags), minsize, pModule->self, selflags );
if (!pSeg->hSeg) return FALSE;
pSeg->flags |= NE_SEGFLAGS_ALLOCATED;
return TRUE;
}
/***********************************************************************
* NE_CreateAllSegments
*/
BOOL NE_CreateAllSegments( NE_MODULE *pModule )
{
int i;
for ( i = 1; i <= pModule->ne_cseg; i++ )
if ( !NE_CreateSegment( pModule, i ) )
return FALSE;
pModule->dgroup_entry = pModule->ne_autodata ? pModule->ne_segtab +
(pModule->ne_autodata - 1) * sizeof(SEGTABLEENTRY) : 0;
return TRUE;
}
/**********************************************************************
* IsSharedSelector (KERNEL.345)
*/
BOOL16 WINAPI IsSharedSelector16( HANDLE16 selector )
{
/* Check whether the selector belongs to a DLL */
NE_MODULE *pModule = NE_GetPtr( selector );
if (!pModule) return FALSE;
return (pModule->ne_flags & NE_FFLAGS_LIBMODULE) != 0;
}
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