if1632/builtin.c

   1 /*
   2  * Built-in modules
   3  *
   4  * Copyright 1996 Alexandre Julliard
   5  */
   6
   7 #include <assert.h>
   8 #include <ctype.h>
   9 #include <string.h>
  10 #include <stdio.h>
  11 #include "winbase.h"
  12 #include "wine/winbase16.h"
  13 #include "builtin16.h"
  14 #include "global.h"
  15 #include "heap.h"
  16 #include "file.h"
  17 #include "module.h"
  18 #include "miscemu.h"
  19 #include "stackframe.h"
  20 #include "debugtools.h"
  21 #include "toolhelp.h"
  22
  23 DEFAULT_DEBUG_CHANNEL(module);
  24
  25 /* Table of all built-in DLLs */
  26
  27 #define MAX_DLLS 50
  28
  29 static const BUILTIN16_DESCRIPTOR *builtin_dlls[MAX_DLLS];
  30 static int nb_dlls;
  31
  32
  33 /* patch all the flat cs references of the code segment if necessary */
  34 inline static void patch_code_segment( void *code_segment )
  35 {
  36 #ifdef __i386__
  37     CALLFROM16 *call = code_segment;
  38     if (call->flatcs == __get_cs()) return;  /* nothing to patch */
  39     while (call->pushl == 0x68)
  40     {
  41         call->flatcs = __get_cs();
  42         call++;
  43     }
  44 #endif
  45 }
  46
  47
  48 /***********************************************************************
  49  *           BUILTIN_DoLoadModule16
  50  *
  51  * Load a built-in Win16 module. Helper function for BUILTIN_LoadModule.
  52  */
  53 static HMODULE16 BUILTIN_DoLoadModule16( const BUILTIN16_DESCRIPTOR *descr )
  54 {
  55     NE_MODULE *pModule;
  56     int minsize;
  57     SEGTABLEENTRY *pSegTable;
  58     HMODULE16 hModule;
  59
  60     hModule = GLOBAL_CreateBlock( GMEM_MOVEABLE, descr->module_start,
  61                                   descr->module_size, 0, WINE_LDT_FLAGS_DATA );
  62     if (!hModule) return 0;
  63     FarSetOwner16( hModule, hModule );
  64
  65     pModule = (NE_MODULE *)GlobalLock16( hModule );
  66     pModule->self = hModule;
  67     /* NOTE: (Ab)use the hRsrcMap parameter for resource data pointer */
  68     pModule->hRsrcMap = (void *)descr->rsrc;
  69
  70     TRACE( "Built-in %s: hmodule=%04x\n", descr->name, hModule );
  71
  72     /* Allocate the code segment */
  73
  74     pSegTable = NE_SEG_TABLE( pModule );
  75     pSegTable->hSeg = GLOBAL_CreateBlock( GMEM_FIXED, descr->code_start,
  76                                           pSegTable->minsize, hModule,
  77                                           WINE_LDT_FLAGS_CODE|WINE_LDT_FLAGS_32BIT );
  78     if (!pSegTable->hSeg) return 0;
  79     patch_code_segment( descr->code_start );
  80     pSegTable++;
  81
  82     /* Allocate the data segment */
  83
  84     minsize = pSegTable->minsize ? pSegTable->minsize : 0x10000;
  85     minsize += pModule->heap_size;
  86     if (minsize > 0x10000) minsize = 0x10000;
  87     pSegTable->hSeg = GlobalAlloc16( GMEM_FIXED, minsize );
  88     if (!pSegTable->hSeg) return 0;
  89     FarSetOwner16( pSegTable->hSeg, hModule );
  90     if (pSegTable->minsize) memcpy( GlobalLock16( pSegTable->hSeg ),
  91                                     descr->data_start, pSegTable->minsize);
  92     if (pModule->heap_size)
  93         LocalInit16( GlobalHandleToSel16(pSegTable->hSeg),
  94                 pSegTable->minsize, minsize );
  95
  96     if (descr->rsrc) NE_InitResourceHandler(hModule);
  97
  98     NE_RegisterModule( pModule );
  99     return hModule;
 100 }
 101
 102
 103 /***********************************************************************
 104  *           BUILTIN_LoadModule
 105  *
 106  * Load a built-in module.
 107  */
 108 HMODULE16 BUILTIN_LoadModule( LPCSTR name )
 109 {
 110     char dllname[20], *p;
 111     void *handle;
 112     int i;
 113
 114     /* Fix the name in case we have a full path and extension */
 115
 116     if ((p = strrchr( name, '\\' ))) name = p + 1;
 117     if ((p = strrchr( name, '/' ))) name = p + 1;
 118
 119     if (strlen(name) >= sizeof(dllname)-4) return (HMODULE16)2;
 120
 121     strcpy( dllname, name );
 122     p = strrchr( dllname, '.' );
 123     if (!p) strcat( dllname, ".dll" );
 124     for (p = dllname; *p; p++) *p = FILE_tolower(*p);
 125
 126     for (i = 0; i < nb_dlls; i++)
 127     {
 128         const BUILTIN16_DESCRIPTOR *descr = builtin_dlls[i];
 129         NE_MODULE *pModule = (NE_MODULE *)descr->module_start;
 130         OFSTRUCT *pOfs = (OFSTRUCT *)((LPBYTE)pModule + pModule->fileinfo);
 131         if (!FILE_strcasecmp( pOfs->szPathName, dllname ))
 132             return BUILTIN_DoLoadModule16( descr );
 133     }
 134
 135     if ((handle = BUILTIN32_dlopen( dllname )))
 136     {
 137         for (i = 0; i < nb_dlls; i++)
 138         {
 139             const BUILTIN16_DESCRIPTOR *descr = builtin_dlls[i];
 140             NE_MODULE *pModule = (NE_MODULE *)descr->module_start;
 141             OFSTRUCT *pOfs = (OFSTRUCT *)((LPBYTE)pModule + pModule->fileinfo);
 142             if (!FILE_strcasecmp( pOfs->szPathName, dllname ))
 143                 return BUILTIN_DoLoadModule16( descr );
 144         }
 145         ERR( "loaded .so but dll %s still not found\n", dllname );
 146         BUILTIN32_dlclose( handle );
 147     }
 148
 149     return (HMODULE16)2;
 150 }
 151
 152
 153 /***********************************************************************
 154  *           BUILTIN_GetEntryPoint16
 155  *
 156  * Return the ordinal, name, and type info corresponding to a CS:IP address.
 157  * This is used only by relay debugging.
 158  */
 159 LPCSTR BUILTIN_GetEntryPoint16( STACK16FRAME *frame, LPSTR name, WORD *pOrd )
 160 {
 161     WORD i, max_offset;
 162     register BYTE *p;
 163     NE_MODULE *pModule;
 164     ET_BUNDLE *bundle;
 165     ET_ENTRY *entry;
 166
 167     if (!(pModule = NE_GetPtr( FarGetOwner16( GlobalHandle16( frame->module_cs ) ))))
 168         return NULL;
 169
 170     max_offset = 0;
 171     *pOrd = 0;
 172     bundle = (ET_BUNDLE *)((BYTE *)pModule + pModule->entry_table);
 173     do
 174     {
 175         entry = (ET_ENTRY *)((BYTE *)bundle+6);
 176         for (i = bundle->first + 1; i <= bundle->last; i++)
 177         {
 178             if ((entry->offs < frame->entry_ip)
 179             && (entry->segnum == 1) /* code segment ? */
 180             && (entry->offs >= max_offset))
 181             {
 182                 max_offset = entry->offs;
 183                 *pOrd = i;
 184             }
 185             entry++;
 186         }
 187     } while ( (bundle->next)
 188            && (bundle = (ET_BUNDLE *)((BYTE *)pModule+bundle->next)));
 189
 190     /* Search for the name in the resident names table */
 191     /* (built-in modules have no non-resident table)   */
 192
 193     p = (BYTE *)pModule + pModule->name_table;
 194     while (*p)
 195     {
 196         p += *p + 1 + sizeof(WORD);
 197         if (*(WORD *)(p + *p + 1) == *pOrd) break;
 198     }
 199
 200     sprintf( name, "%.*s.%d: %.*s",
 201              *((BYTE *)pModule + pModule->name_table),
 202              (char *)pModule + pModule->name_table + 1,
 203              *pOrd, *p, (char *)(p + 1) );
 204
 205     /* Retrieve type info string */
 206     return *(LPCSTR *)((LPBYTE)MapSL( MAKESEGPTR( frame->module_cs, frame->callfrom_ip )) + 4);
 207 }
 208
 209
 210 /***********************************************************************
 211  *           __wine_register_dll_16
 212  *
 213  * Register a built-in DLL descriptor.
 214  */
 215 void __wine_register_dll_16( const BUILTIN16_DESCRIPTOR *descr )
 216 {
 217     assert( nb_dlls < MAX_DLLS );
 218     builtin_dlls[nb_dlls++] = descr;
 219 }