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   1 /*
   2  * cstub.c
   3  *
   4  * Create DLL stublib
   5  *
   6  * © 1994-1998 Straylight
   7  */
   8
   9 /*----- Licensing note ----------------------------------------------------*
  10  *
  11  * This file is part of Straylight's Dynamic Linking System (SDLS)
  12  *
  13  * SDLS is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2, or (at your option)
  16  * any later version.
  17  *
  18  * SDLS is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with SDLS.  If not, write to the Free Software Foundation,
  25  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26  */
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30 #include <string.h>
  31 #include <stddef.h>
  32
  33 #include "cstub.h"
  34 #include "readdef.h"
  35 #include "aof/aof.h"
  36 #include "aof/chunk.h"
  37 #include "hashtable.h"
  38 #include "error.h"
  39
  40 typedef struct
  41 {
  42   aof_file f;
  43   int areaname;
  44   int abase;
  45   hashtable osym;
  46 }
  47 cstub__thing;
  48
  49 #define cstub__MAGIC 0x004c4c44
  50 #define cstub__VERSION 100
  51
  52 static int term;
  53
  54 static void cstub__enames(char *p,unsigned ord,void *handle)
  55 {
  56   cstub__thing *t=handle;
  57   if (ord==0xFFFFFFFF && hash_find(t->osym,p))
  58     aof_string(p,t->f.area);
  59 }
  60
  61 static void cstub__entries(char *p,unsigned ord,void *handle)
  62 {
  63   cstub__thing *t=handle;
  64   static int entry[1]={0xE3A0F000};             /* MOV  PC,#0           */
  65   if (hash_find(t->osym,p))
  66   {
  67     aof_addsym(p,t->f.area->next-t->abase,0,t->areaname,&t->f);
  68     if (ord==0xFFFFFFFF)
  69     {
  70       aof_add(entry,t->f.area);
  71       term=1;
  72     }
  73     else
  74       aof_add(ord,t->f.area);
  75   }
  76 }
  77
  78 void cstub(char *name,readdef_info *inf,hashtable osym)
  79 {
  80   FILE *fp;
  81   char buffer[256];
  82
  83   if (!inf->apptbl)
  84   {
  85     /* --- Don't check if we're creating application stubs --- */
  86
  87     if (!inf->name[0])
  88     {
  89       if (!(inf->errored & rd_name))
  90         error(NONAME);
  91       inf->errored|=rd_name;
  92     }
  93     if (inf->version==-1)
  94     {
  95       if (!(inf->errored & rd_version))
  96         error(NOVERSION);
  97       inf->errored|=rd_version;
  98       inf->version=100;
  99     }
 100     if (inf->errored & rd_name)
 101       return;
 102   }
 103
 104   fp=fopen(name,"wb");                  /* Open the output file         */
 105   if (!fp)                              /* If the file wasn't opened    */
 106     error(NOOPENOUT,name);              /* Better give an error         */
 107   else
 108   {
 109     char _buf[sizeof(chunk_fixedHeader)+5*sizeof(chunk_tableEntry)];
 110     chunk_header *h=(chunk_header *)&_buf; /* Allocate memory easily :-) */
 111
 112     aof_chunkinfo obj_idfn={0};
 113     aof_chunkinfo obj_head={0};
 114     aof_chunkinfo obj_area={0};
 115     aof_chunkinfo obj_symt={0};
 116     aof_chunkinfo obj_strt={0};
 117     aof_chunkinfo reloc={0};
 118     cstub__thing t;
 119
 120     int o;
 121     int osize=0;
 122     int orelocs=0;
 123
 124     int sym_dllName;
 125     int sym_dllEntries;
 126     int sym_dllStubs;
 127     int tmp;
 128
 129     t.f.area=&obj_area;
 130     t.osym=osym;
 131     t.f.symt=&obj_symt;
 132     t.f.strt=&obj_strt;
 133     t.f.reloc=&reloc;
 134
 135     h->hdr.id=chunk_MAGIC;              /* Fill in magic thingy         */
 136     h->hdr.maxChunks=h->hdr.numChunks=5; /* And number of chunks        */
 137
 138     aof_string("Straylight Dynamic Link Library building system 1.01",
 139                  &obj_idfn);
 140     aof_align(obj_idfn);
 141
 142     aof_int(0,&obj_strt);
 143
 144     aof_int((int)aof_RELOC,&obj_head);
 145     aof_int(150,&obj_head);
 146     aof_int((inf->apptbl ? 1 : 3),&obj_head);
 147     aof_int(obj_symt.next/sizeof(aof_symbol),&obj_head);
 148     aof_int(0,&obj_head);
 149     aof_int(0,&obj_head);
 150
 151     /* --- Do entry names for dll table --- */
 152
 153     if (inf->apptbl)
 154       t.areaname=aof_string("DLL$$AppEntry",&obj_strt);
 155     else
 156       t.areaname=aof_string("DLL$$Strings",&obj_strt);
 157     t.abase=obj_area.next;
 158
 159     if (!inf->apptbl)
 160     {
 161       sym_dllName=obj_symt.next/16;
 162       aof_addsym("_dll_name",
 163                  obj_area.next-t.abase,
 164                  1,
 165                  t.areaname,
 166                  &t.f);
 167
 168       if (inf->dllpath)
 169       {
 170         sprintf(buffer,"%s[%s]",inf->dllpath,inf->name);
 171         aof_string(buffer,&obj_area);
 172       }
 173       else
 174       {
 175         sprintf(buffer,"[%s]",inf->name);
 176         aof_string(buffer,&obj_area);
 177       }
 178
 179       sym_dllEntries=obj_symt.next/16;
 180       aof_addsym("_dll_entries",
 181                  obj_area.next-t.abase,
 182                  1,
 183                  t.areaname,
 184                  &t.f);
 185
 186       /* --- Hack for link v. 5.00 --- *
 187        *
 188        * We IMPORT the symbol _dll_findall in order to ensure that DLLLib
 189        * gets linked in.
 190        */
 191
 192       {
 193         aof_symbol sym={0};
 194         sym.name=aof_string("_dll_findall",&obj_strt);
 195         sym.defined=0;
 196         sym.export=1;
 197         aof_add(sym,&obj_symt);
 198       }
 199     }
 200     else
 201     {
 202       aof_addsym("DLL$$AppEntryNames",
 203                  obj_area.next-t.abase,
 204                  0,
 205                  t.areaname,
 206                  &t.f);
 207     }
 208
 209     hash_enumOrdered(inf->sym,cstub__enames,&t);
 210
 211     { char c=0; aof_add(c,&obj_area); }
 212
 213     aof_align(obj_area);
 214
 215     if (!inf->apptbl)
 216     {
 217       aof_int(t.areaname,&obj_head);
 218       aof_int(0x00002202,&obj_head);
 219       aof_int(obj_area.next-osize,&obj_head);
 220       aof_int(reloc.next/8-orelocs,&obj_head);
 221       aof_int(0,&obj_head);
 222       aof_addBlock(reloc.p,reloc.next,&obj_area);
 223       osize=obj_area.next;
 224       orelocs=reloc.next/8;
 225
 226       /* --- Do entry veneers table --- */
 227
 228       t.areaname=aof_string("DLL$$Stubs",&obj_strt);
 229       t.abase=obj_area.next;
 230
 231       sym_dllStubs=obj_symt.next/16;
 232       aof_addsym("_dll_stubs",
 233                  obj_area.next-t.abase,
 234                  1,
 235                  t.areaname,
 236                  &t.f);
 237     }
 238     else
 239     {
 240       aof_addsym("DLL$$AppEntryStubs",
 241                  obj_area.next-t.abase,
 242                  0,
 243                  t.areaname,
 244                  &t.f);
 245     }
 246
 247     term=0;
 248     hash_enumOrdered(inf->sym,cstub__entries,&t);
 249     if (!term)
 250       aof_int(-1,&obj_area);
 251
 252     aof_align(obj_area);
 253
 254     aof_int(t.areaname,&obj_head);
 255     aof_int(0x00002202,&obj_head);
 256     aof_int(obj_area.next-osize,&obj_head);
 257     aof_int(reloc.next/8-orelocs,&obj_head);
 258     aof_int(0,&obj_head);
 259     aof_addBlock(reloc.p,reloc.next,&obj_area);
 260     osize=obj_area.next;
 261     orelocs=reloc.next/8;
 262
 263     /* --- Do external DLL table area --- */
 264
 265     if (!inf->apptbl)
 266     {
 267       t.areaname=aof_string("DLL$$ExternalTable",&obj_strt);
 268       t.abase=obj_area.next;
 269
 270       tmp=aof_int(0,&obj_area)-t.abase;
 271       aof_add(tmp,&reloc);
 272       aof_int(0x000A0000 | sym_dllName,&reloc);
 273
 274       aof_int(inf->version,&obj_area);
 275
 276       tmp=aof_int(0,&obj_area)-t.abase;
 277       aof_add(tmp,&reloc);
 278       aof_int(0x000A0000 | sym_dllEntries,&reloc);
 279
 280       tmp=aof_int(0,&obj_area)-t.abase;
 281       aof_add(tmp,&reloc);
 282       aof_int(0x000A0000 | sym_dllStubs,&reloc);
 283
 284       aof_align(obj_area);
 285
 286       aof_int(t.areaname,&obj_head);
 287       aof_int(0x00002202,&obj_head);
 288       aof_int(obj_area.next-osize,&obj_head);
 289       aof_int(reloc.next/8-orelocs,&obj_head);
 290       aof_int(0,&obj_head);
 291       aof_addBlock(reloc.p,reloc.next,&obj_area);
 292       osize=obj_area.next;
 293       orelocs=reloc.next/8;
 294     }
 295
 296     aof_fill(obj_strt.next,0,&obj_strt);
 297     aof_align(obj_strt);
 298
 299     o=obj_symt.next/sizeof(aof_symbol);
 300     aof_fill(o,12,&obj_head);
 301
 302     memcpy(h->table[0].chunkName,"OBJ_IDFN",8);
 303     memcpy(h->table[1].chunkName,"OBJ_HEAD",8);
 304     memcpy(h->table[2].chunkName,"OBJ_AREA",8);
 305     memcpy(h->table[3].chunkName,"OBJ_SYMT",8);
 306     memcpy(h->table[4].chunkName,"OBJ_STRT",8);
 307
 308     o=sizeof(chunk_fixedHeader)+5*sizeof(chunk_tableEntry);
 309
 310     h->table[0].offset=o;
 311     h->table[0].size=obj_idfn.next;
 312     o+=obj_idfn.next;
 313
 314     h->table[1].offset=o;
 315     h->table[1].size=obj_head.next;
 316     o+=obj_head.next;
 317
 318     h->table[2].offset=o;
 319     h->table[2].size=obj_area.next;
 320     o+=obj_area.next;
 321
 322     h->table[3].offset=o;
 323     h->table[3].size=obj_symt.next;
 324     o+=obj_symt.next;
 325
 326     h->table[4].offset=o;
 327     h->table[4].size=obj_strt.next;
 328     o+=obj_strt.next;
 329
 330     fwrite(h,sizeof(chunk_fixedHeader)+5*sizeof(chunk_tableEntry),1,fp);
 331     fwrite(obj_idfn.p,obj_idfn.next,1,fp);
 332     fwrite(obj_head.p,obj_head.next,1,fp);
 333     fwrite(obj_area.p,obj_area.next,1,fp);
 334     fwrite(obj_symt.p,obj_symt.next,1,fp);
 335     fwrite(obj_strt.p,obj_strt.next,1,fp);
 336     fclose(fp);
 337
 338     free(obj_idfn.p);
 339     free(obj_area.p);
 340     free(obj_strt.p);
 341     free(obj_head.p);
 342     free(obj_symt.p);
 343   }
 344 }