relay32/relay386.c

   1 /*
   2  * 386-specific Win32 relay functions
   3  *
   4  * Copyright 1997 Alexandre Julliard
   5  */
   6
   7
   8 #include <assert.h>
   9 #include <string.h>
  10 #include "winnt.h"
  11 #include "windows.h"
  12 #include "builtin32.h"
  13 #include "selectors.h"
  14 #include "debugstr.h"
  15 #include "debug.h"
  16 #include "main.h"
  17
  18 char **debug_relay_excludelist = NULL, **debug_relay_includelist = NULL;
  19
  20 #ifdef __i386__
  21 /***********************************************************************
  22  *           RELAY_ShowDebugmsgRelay
  23  *
  24  * Simple function to decide if a particular debugging message is
  25  * wanted.  Called from RELAY_CallFrom32 and from in if1632/relay.c
  26  */
  27 int RELAY_ShowDebugmsgRelay(const char *func) {
  28
  29   if(debug_relay_excludelist || debug_relay_includelist) {
  30     const char *term = strchr(func, ':');
  31     char **listitem;
  32     int len, len2, itemlen, show;
  33
  34     if(debug_relay_excludelist) {
  35       show = 1;
  36       listitem = debug_relay_excludelist;
  37     } else {
  38       show = 0;
  39       listitem = debug_relay_includelist;
  40     }
  41     assert(term);
  42     assert(strlen(term) > 2);
  43     len = term - func;
  44     len2 = strchr(func, '.') - func;
  45     assert(len2 && len2 > 0 && len2 < 64);
  46     term += 2;
  47     for(; *listitem; listitem++) {
  48       itemlen = strlen(*listitem);
  49       if((itemlen == len && !strncmp(*listitem, func, len)) ||
  50          (itemlen == len2 && !strncmp(*listitem, func, len2)) ||
  51          !strcmp(*listitem, term)) {
  52         show = !show;
  53        break;
  54       }
  55     }
  56     return show;
  57   }
  58   return 1;
  59 }
  60
  61 /***********************************************************************
  62  *           RELAY_CallFrom32
  63  *
  64  * Stack layout on entry to this function:
  65  *  ...      ...
  66  * (esp+12)  arg2
  67  * (esp+8)   arg1
  68  * (esp+4)   ret_addr
  69  * (esp)     return addr to relay code
  70  */
  71 int RELAY_CallFrom32( int ret_addr, ... )
  72 {
  73     int i, ret;
  74     char buffer[80];
  75     FARPROC32 func;
  76     unsigned int mask, typemask;
  77     WORD fs;
  78
  79     int *args = &ret_addr;
  80     /* Relay addr is the return address for this function */
  81     BYTE *relay_addr = (BYTE *)args[-1];
  82     WORD nb_args = *(WORD *)(relay_addr + 1) / sizeof(int);
  83
  84     assert(TRACE_ON(relay));
  85     func = (FARPROC32)BUILTIN32_GetEntryPoint( buffer, relay_addr - 5,
  86                                                &typemask );
  87       DPRINTF( "Call %s(", buffer );
  88       args++;
  89       for (i = 0, mask = 3; i < nb_args; i++, mask <<= 2)
  90       {
  91         if (i) DPRINTF( "," );
  92         if ((typemask & mask) && HIWORD(args[i]))
  93         {
  94             if (typemask & (2<<(2*i)))
  95                 DPRINTF( "%08x L%s", args[i], debugstr_w((LPWSTR)args[i]) );
  96             else
  97                 DPRINTF( "%08x %s", args[i], debugstr_a((LPCSTR)args[i]) );
  98         }
  99         else DPRINTF( "%08x", args[i] );
 100       }
 101       GET_FS( fs );
 102       DPRINTF( ") ret=%08x fs=%04x\n", ret_addr, fs );
 103
 104     if (*relay_addr == 0xc3) /* cdecl */
 105     {
 106         LRESULT (*cfunc)() = (LRESULT(*)())func;
 107         switch(nb_args)
 108         {
 109         case 0: ret = cfunc(); break;
 110         case 1: ret = cfunc(args[0]); break;
 111         case 2: ret = cfunc(args[0],args[1]); break;
 112         case 3: ret = cfunc(args[0],args[1],args[2]); break;
 113         case 4: ret = cfunc(args[0],args[1],args[2],args[3]); break;
 114         case 5: ret = cfunc(args[0],args[1],args[2],args[3],args[4]); break;
 115         case 6: ret = cfunc(args[0],args[1],args[2],args[3],args[4],
 116                             args[5]); break;
 117         case 7: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 118                             args[6]); break;
 119         case 8: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 120                             args[6],args[7]); break;
 121         case 9: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 122                             args[6],args[7],args[8]); break;
 123         case 10: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 124                              args[6],args[7],args[8],args[9]); break;
 125         case 11: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 126                              args[6],args[7],args[8],args[9],args[10]); break;
 127         case 12: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 128                              args[6],args[7],args[8],args[9],args[10],
 129                              args[11]); break;
 130         case 13: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 131                              args[6],args[7],args[8],args[9],args[10],args[11],
 132                              args[12]); break;
 133         case 14: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 134                              args[6],args[7],args[8],args[9],args[10],args[11],
 135                              args[12],args[13]); break;
 136         case 15: ret = cfunc(args[0],args[1],args[2],args[3],args[4],args[5],
 137                              args[6],args[7],args[8],args[9],args[10],args[11],
 138                              args[12],args[13],args[14]); break;
 139         default:
 140             ERR(relay, "Unsupported nb args %d\n",
 141                      nb_args );
 142             assert(FALSE);
 143         }
 144     }
 145     else  /* stdcall */
 146     {
 147         switch(nb_args)
 148         {
 149         case 0: ret = func(); break;
 150         case 1: ret = func(args[0]); break;
 151         case 2: ret = func(args[0],args[1]); break;
 152         case 3: ret = func(args[0],args[1],args[2]); break;
 153         case 4: ret = func(args[0],args[1],args[2],args[3]); break;
 154         case 5: ret = func(args[0],args[1],args[2],args[3],args[4]); break;
 155         case 6: ret = func(args[0],args[1],args[2],args[3],args[4],
 156                            args[5]); break;
 157         case 7: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 158                            args[6]); break;
 159         case 8: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 160                            args[6],args[7]); break;
 161         case 9: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 162                            args[6],args[7],args[8]); break;
 163         case 10: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 164                             args[6],args[7],args[8],args[9]); break;
 165         case 11: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 166                             args[6],args[7],args[8],args[9],args[10]); break;
 167         case 12: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 168                             args[6],args[7],args[8],args[9],args[10],
 169                             args[11]); break;
 170         case 13: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 171                             args[6],args[7],args[8],args[9],args[10],args[11],
 172                             args[12]); break;
 173         case 14: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 174                             args[6],args[7],args[8],args[9],args[10],args[11],
 175                             args[12],args[13]); break;
 176         case 15: ret = func(args[0],args[1],args[2],args[3],args[4],args[5],
 177                             args[6],args[7],args[8],args[9],args[10],args[11],
 178                             args[12],args[13],args[14]); break;
 179         default:
 180             ERR(relay, "Unsupported nb args %d\n",nb_args );
 181             assert(FALSE);
 182         }
 183     }
 184     DPRINTF( "Ret  %s() retval=%08x ret=%08x fs=%04x\n",
 185              buffer, ret, ret_addr, fs );
 186     return ret;
 187 }
 188
 189
 190 /***********************************************************************
 191  *           RELAY_CallFrom32Regs
 192  *
 193  * 'context' contains the register contents at the point of call of
 194  * the REG_ENTRY_POINT. The stack layout of the stack pointed to by
 195  * ESP_reg(&context) is as follows:
 196  *
 197  * If debugmsg(relay) is OFF:
 198  *  ...    ...
 199  * (esp+4) args
 200  * (esp)   return addr to caller
 201  * (esp-4) function entry point
 202  *
 203  * If debugmsg(relay) is ON:
 204  *  ...    ...
 205  * (esp+8) args
 206  * (esp+4) return addr to caller
 207  * (esp)   return addr to DEBUG_ENTRY_POINT
 208  * (esp-4) function entry point
 209  *
 210  * As the called function might change the stack layout
 211  * (e.g. FT_Prolog, FT_ExitNN), we remove all modifications to the stack,
 212  * so that the called function sees (in both cases):
 213  *
 214  *  ...    ...
 215  * (esp+4) args
 216  * (esp)   return addr to caller
 217  *  ...    >128 bytes space free to be modified (ensured by the assembly glue)
 218  *
 219  * NOTE: This routine makes no assumption about the relative position of
 220  *       its own stack to the stack pointed to by ESP_reg(&context),
 221  *       except that the latter must have >128 bytes space to grow.
 222  *       This means the assembly glue could even switch stacks completely
 223  *       (e.g. to allow for large stacks).
 224  *
 225  */
 226
 227 void RELAY_CallFrom32Regs( CONTEXT context )
 228 {
 229     typedef void (CALLBACK *entry_point_t)(CONTEXT *);
 230     entry_point_t entry_point = *(entry_point_t*) (ESP_reg(&context) - 4);
 231
 232     __RESTORE_ES;
 233
 234     if (!TRACE_ON(relay))
 235     {
 236         /* Simply call the entry point */
 237         entry_point( &context );
 238     }
 239     else
 240     {
 241         char buffer[80];
 242         unsigned int typemask;
 243         BYTE *relay_addr;
 244
 245         /*
 246          * Fixup the context structure because of the extra parameter
 247          * pushed by the relay debugging code.
 248          * Note that this implicitly does a RET on the CALL from the
 249          * DEBUG_ENTRY_POINT to the REG_ENTRY_POINT;  setting the EIP register
 250          * ensures that the assembly glue will directly return to the
 251          * caller, just as in the non-debugging case.
 252          */
 253
 254         relay_addr = *(BYTE **) ESP_reg(&context);
 255         if (BUILTIN32_GetEntryPoint( buffer, relay_addr - 5, &typemask )) {
 256             /* correct win32 spec generated register function found.
 257              * remove extra call stuff from stack
 258              */
 259             ESP_reg(&context) += sizeof(BYTE *);
 260             EIP_reg(&context) = *(DWORD *)ESP_reg(&context);
 261             DPRINTF("Call %s(regs) ret=%08x\n", buffer, *(int *)ESP_reg(&context) );
 262             DPRINTF(" EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx ESI=%08lx EDI=%08lx\n",
 263                     EAX_reg(&context), EBX_reg(&context), ECX_reg(&context),
 264                     EDX_reg(&context), ESI_reg(&context), EDI_reg(&context) );
 265             DPRINTF(" EBP=%08lx ESP=%08lx EIP=%08lx DS=%04lx ES=%04lx FS=%04lx GS=%04lx EFL=%08lx\n",
 266                     EBP_reg(&context), ESP_reg(&context), EIP_reg(&context),
 267                     DS_reg(&context), ES_reg(&context), FS_reg(&context),
 268                     GS_reg(&context), EFL_reg(&context) );
 269
 270             /* Now call the real function */
 271             entry_point( &context );
 272
 273
 274             DPRINTF("Ret  %s() retval=regs ret=%08x\n", buffer, *(int *)ESP_reg(&context) );
 275             DPRINTF(" EAX=%08lx EBX=%08lx ECX=%08lx EDX=%08lx ESI=%08lx EDI=%08lx\n",
 276                     EAX_reg(&context), EBX_reg(&context), ECX_reg(&context),
 277                     EDX_reg(&context), ESI_reg(&context), EDI_reg(&context) );
 278             DPRINTF(" EBP=%08lx ESP=%08lx EIP=%08lx DS=%04lx ES=%04lx FS=%04lx GS=%04lx EFL=%08lx\n",
 279                     EBP_reg(&context), ESP_reg(&context), EIP_reg(&context),
 280                     DS_reg(&context), ES_reg(&context), FS_reg(&context),
 281                     GS_reg(&context), EFL_reg(&context) );
 282         } else
 283             /* WINE internal register function found. Do not remove anything.
 284              * Do not print any debuginfo (it is not a normal relayed one).
 285              * Currently only used for snooping.
 286              */
 287            entry_point( &context );
 288     }
 289 }
 290 #endif  /* __i386__ */