wine/if1632/builtin.c
Alexandre Julliard aa5a1162a3 Patch flat cs of 16-bit entry points if current %cs is different from
compiled value, and retrieve flat ds from a global variable. This
should avoid problems with win4lin kernels.
2000-10-29 01:28:30 +00:00

220 lines
6.3 KiB
C

/*
* Built-in modules
*
* Copyright 1996 Alexandre Julliard
*/
#include <assert.h>
#include <ctype.h>
#include <string.h>
#include <stdio.h>
#include "winbase.h"
#include "wine/winbase16.h"
#include "wine/winestring.h"
#include "builtin16.h"
#include "global.h"
#include "heap.h"
#include "module.h"
#include "miscemu.h"
#include "stackframe.h"
#include "selectors.h"
#include "task.h"
#include "debugtools.h"
#include "toolhelp.h"
DEFAULT_DEBUG_CHANNEL(module);
/* Table of all built-in DLLs */
#define MAX_DLLS 50
static const BUILTIN16_DESCRIPTOR *builtin_dlls[MAX_DLLS];
static int nb_dlls;
/* patch all the flat cs references of the code segment if necessary */
inline static void patch_code_segment( void *code_segment )
{
#ifdef __i386__
CALLFROM16 *call = code_segment;
if (call->flatcs == __get_cs()) return; /* nothing to patch */
while (call->pushl == 0x68)
{
call->flatcs = __get_cs();
call++;
}
#endif
}
/***********************************************************************
* BUILTIN_DoLoadModule16
*
* Load a built-in Win16 module. Helper function for BUILTIN_LoadModule.
*/
static HMODULE16 BUILTIN_DoLoadModule16( const BUILTIN16_DESCRIPTOR *descr )
{
NE_MODULE *pModule;
int minsize;
SEGTABLEENTRY *pSegTable;
HMODULE16 hModule;
hModule = GLOBAL_CreateBlock( GMEM_MOVEABLE, descr->module_start,
descr->module_size, 0,
FALSE, FALSE, FALSE );
if (!hModule) return 0;
FarSetOwner16( hModule, hModule );
pModule = (NE_MODULE *)GlobalLock16( hModule );
pModule->self = hModule;
/* NOTE: (Ab)use the hRsrcMap parameter for resource data pointer */
pModule->hRsrcMap = (void *)descr->rsrc;
TRACE( "Built-in %s: hmodule=%04x\n", descr->name, hModule );
/* Allocate the code segment */
pSegTable = NE_SEG_TABLE( pModule );
pSegTable->hSeg = GLOBAL_CreateBlock( GMEM_FIXED, descr->code_start,
pSegTable->minsize, hModule, TRUE, TRUE, FALSE );
if (!pSegTable->hSeg) return 0;
patch_code_segment( descr->code_start );
pSegTable++;
/* Allocate the data segment */
minsize = pSegTable->minsize ? pSegTable->minsize : 0x10000;
minsize += pModule->heap_size;
if (minsize > 0x10000) minsize = 0x10000;
pSegTable->hSeg = GLOBAL_Alloc( GMEM_FIXED, minsize,
hModule, FALSE, FALSE, FALSE );
if (!pSegTable->hSeg) return 0;
if (pSegTable->minsize) memcpy( GlobalLock16( pSegTable->hSeg ),
descr->data_start, pSegTable->minsize);
if (pModule->heap_size)
LocalInit16( GlobalHandleToSel16(pSegTable->hSeg),
pSegTable->minsize, minsize );
if (descr->rsrc) NE_InitResourceHandler(hModule);
NE_RegisterModule( pModule );
return hModule;
}
/***********************************************************************
* BUILTIN_LoadModule
*
* Load a built-in module.
*/
HMODULE16 BUILTIN_LoadModule( LPCSTR name )
{
char dllname[20], *p;
void *handle;
int i;
/* Fix the name in case we have a full path and extension */
if ((p = strrchr( name, '\\' ))) name = p + 1;
if ((p = strrchr( name, '/' ))) name = p + 1;
if (strlen(name) >= sizeof(dllname)-4) return (HMODULE16)2;
strcpy( dllname, name );
p = strrchr( dllname, '.' );
if (!p) strcat( dllname, ".dll" );
for (i = 0; i < nb_dlls; i++)
{
const BUILTIN16_DESCRIPTOR *descr = builtin_dlls[i];
NE_MODULE *pModule = (NE_MODULE *)descr->module_start;
OFSTRUCT *pOfs = (OFSTRUCT *)((LPBYTE)pModule + pModule->fileinfo);
if (!strcasecmp( pOfs->szPathName, dllname ))
return BUILTIN_DoLoadModule16( descr );
}
if ((handle = BUILTIN32_dlopen( dllname )))
{
for (i = 0; i < nb_dlls; i++)
{
const BUILTIN16_DESCRIPTOR *descr = builtin_dlls[i];
NE_MODULE *pModule = (NE_MODULE *)descr->module_start;
OFSTRUCT *pOfs = (OFSTRUCT *)((LPBYTE)pModule + pModule->fileinfo);
if (!strcasecmp( pOfs->szPathName, dllname ))
return BUILTIN_DoLoadModule16( descr );
}
ERR( "loaded .so but dll %s still not found\n", dllname );
BUILTIN32_dlclose( handle );
}
return (HMODULE16)2;
}
/***********************************************************************
* BUILTIN_GetEntryPoint16
*
* Return the ordinal, name, and type info corresponding to a CS:IP address.
* This is used only by relay debugging.
*/
LPCSTR BUILTIN_GetEntryPoint16( STACK16FRAME *frame, LPSTR name, WORD *pOrd )
{
WORD i, max_offset;
register BYTE *p;
NE_MODULE *pModule;
ET_BUNDLE *bundle;
ET_ENTRY *entry;
if (!(pModule = NE_GetPtr( FarGetOwner16( GlobalHandle16( frame->module_cs ) ))))
return NULL;
max_offset = 0;
*pOrd = 0;
bundle = (ET_BUNDLE *)((BYTE *)pModule + pModule->entry_table);
do
{
entry = (ET_ENTRY *)((BYTE *)bundle+6);
for (i = bundle->first + 1; i <= bundle->last; i++)
{
if ((entry->offs < frame->entry_ip)
&& (entry->segnum == 1) /* code segment ? */
&& (entry->offs >= max_offset))
{
max_offset = entry->offs;
*pOrd = i;
}
entry++;
}
} while ( (bundle->next)
&& (bundle = (ET_BUNDLE *)((BYTE *)pModule+bundle->next)));
/* Search for the name in the resident names table */
/* (built-in modules have no non-resident table) */
p = (BYTE *)pModule + pModule->name_table;
while (*p)
{
p += *p + 1 + sizeof(WORD);
if (*(WORD *)(p + *p + 1) == *pOrd) break;
}
sprintf( name, "%.*s.%d: %.*s",
*((BYTE *)pModule + pModule->name_table),
(char *)pModule + pModule->name_table + 1,
*pOrd, *p, (char *)(p + 1) );
/* Retrieve type info string */
return *(LPCSTR *)((LPBYTE)PTR_SEG_OFF_TO_LIN( frame->module_cs, frame->callfrom_ip ) + 4);
}
/***********************************************************************
* BUILTIN_RegisterDLL
*
* Register a built-in DLL descriptor.
*/
void BUILTIN_RegisterDLL( const BUILTIN16_DESCRIPTOR *descr )
{
assert( nb_dlls < MAX_DLLS );
builtin_dlls[nb_dlls++] = descr;
}