dlls/ntdll/tests/exception.c

   1 /*
   2  * Unit test suite for ntdll exceptions
   3  *
   4  * Copyright 2005 Alexandre Julliard
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include <stdarg.h>
  22 #include <stdio.h>
  23
  24 #ifndef _WIN32_WINNT
  25 #define _WIN32_WINNT 0x500 /* For NTSTATUS */
  26 #endif
  27
  28 #include "ntstatus.h"
  29 #define WIN32_NO_STATUS
  30 #include "windef.h"
  31 #include "winbase.h"
  32 #include "winnt.h"
  33 #include "winreg.h"
  34 #include "winternl.h"
  35 #include "excpt.h"
  36 #include "wine/test.h"
  37
  38 #ifdef __i386__
  39 static int      my_argc;
  40 static char**   my_argv;
  41 static int      test_stage;
  42
  43 static struct _TEB * (WINAPI *pNtCurrentTeb)(void);
  44 static NTSTATUS  (WINAPI *pNtGetContextThread)(HANDLE,CONTEXT*);
  45 static NTSTATUS  (WINAPI *pNtSetContextThread)(HANDLE,CONTEXT*);
  46 static NTSTATUS  (WINAPI *pRtlRaiseException)(EXCEPTION_RECORD *rec);
  47 static PVOID     (WINAPI *pRtlAddVectoredExceptionHandler)(ULONG first, PVECTORED_EXCEPTION_HANDLER func);
  48 static ULONG     (WINAPI *pRtlRemoveVectoredExceptionHandler)(PVOID handler);
  49 static NTSTATUS  (WINAPI *pNtReadVirtualMemory)(HANDLE, const void*, void*, SIZE_T, SIZE_T*);
  50 static NTSTATUS  (WINAPI *pNtTerminateProcess)(HANDLE handle, LONG exit_code);
  51 static void *code_mem;
  52
  53 /* Test various instruction combinations that cause a protection fault on the i386,
  54  * and check what the resulting exception looks like.
  55  */
  56
  57 static const struct exception
  58 {
  59     BYTE     code[18];   /* asm code */
  60     BYTE     offset;     /* offset of faulting instruction */
  61     BYTE     length;     /* length of faulting instruction */
  62     NTSTATUS status;     /* expected status code */
  63     DWORD    nb_params;  /* expected number of parameters */
  64     DWORD    params[4];  /* expected parameters */
  65 } exceptions[] =
  66 {
  67     /* test some privileged instructions */
  68     { { 0xfb, 0xc3 },  /* sti; ret */
  69       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  70     { { 0x6c, 0xc3 },  /* insb (%dx); ret */
  71       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  72     { { 0x6d, 0xc3 },  /* insl (%dx); ret */
  73       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  74     { { 0x6e, 0xc3 },  /* outsb (%dx); ret */
  75       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  76     { { 0x6f, 0xc3 },  /* outsl (%dx); ret */
  77       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  78     { { 0xe4, 0x11, 0xc3 },  /* inb $0x11,%al; ret */
  79       0, 2, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  80     { { 0xe5, 0x11, 0xc3 },  /* inl $0x11,%eax; ret */
  81       0, 2, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  82     { { 0xe6, 0x11, 0xc3 },  /* outb %al,$0x11; ret */
  83       0, 2, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  84     { { 0xe7, 0x11, 0xc3 },  /* outl %eax,$0x11; ret */
  85       0, 2, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  86     { { 0xed, 0xc3 },  /* inl (%dx),%eax; ret */
  87       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  88     { { 0xee, 0xc3 },  /* outb %al,(%dx); ret */
  89       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  90     { { 0xef, 0xc3 },  /* outl %eax,(%dx); ret */
  91       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  92     { { 0xf4, 0xc3 },  /* hlt; ret */
  93       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  94     { { 0xfa, 0xc3 },  /* cli; ret */
  95       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  96
  97     /* test long jump to invalid selector */
  98     { { 0xea, 0, 0, 0, 0, 0, 0, 0xc3 },  /* ljmp $0,$0; ret */
  99       0, 7, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
 100
 101     /* test iret to invalid selector */
 102     { { 0x6a, 0x00, 0x6a, 0x00, 0x6a, 0x00, 0xcf, 0x83, 0xc4, 0x0c, 0xc3 },
 103       /* pushl $0; pushl $0; pushl $0; iret; addl $12,%esp; ret */
 104       6, 1, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
 105
 106     /* test loading an invalid selector */
 107     { { 0xb8, 0xef, 0xbe, 0x00, 0x00, 0x8e, 0xe8, 0xc3 },  /* mov $beef,%ax; mov %ax,%gs; ret */
 108       5, 2, STATUS_ACCESS_VIOLATION, 2, { 0, 0xbee8 } },
 109
 110     /* test accessing a zero selector */
 111     { { 0x06, 0x31, 0xc0, 0x8e, 0xc0, 0x26, 0xa1, 0, 0, 0, 0, 0x07, 0xc3 },
 112           /* push %es; xor %eax,%eax; mov %ax,%es; mov %es:(0),%ax; pop %es */
 113       5, 6, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
 114
 115     /* test moving %cs -> %ss */
 116     { { 0x0e, 0x17, 0x58, 0xc3 },  /* pushl %cs; popl %ss; popl %eax; ret */
 117       1, 1, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
 118
 119     /* test overlong instruction (limit is 16 bytes) */
 120     { { 0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0xfa,0xc3 },
 121       0, 16, STATUS_ILLEGAL_INSTRUCTION, 0 },
 122     { { 0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0xfa,0xc3 },
 123       0, 15, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 124
 125     /* test invalid interrupt */
 126     { { 0xcd, 0xff, 0xc3 },   /* int $0xff; ret */
 127       0, 2, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
 128
 129     /* test moves to/from Crx */
 130     { { 0x0f, 0x20, 0xc0, 0xc3 },  /* movl %cr0,%eax; ret */
 131       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 132     { { 0x0f, 0x20, 0xe0, 0xc3 },  /* movl %cr4,%eax; ret */
 133       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 134     { { 0x0f, 0x22, 0xc0, 0xc3 },  /* movl %eax,%cr0; ret */
 135       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 136     { { 0x0f, 0x22, 0xe0, 0xc3 },  /* movl %eax,%cr4; ret */
 137       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 138
 139     /* test moves to/from Drx */
 140     { { 0x0f, 0x21, 0xc0, 0xc3 },  /* movl %dr0,%eax; ret */
 141       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 142     { { 0x0f, 0x21, 0xc8, 0xc3 },  /* movl %dr1,%eax; ret */
 143       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 144     { { 0x0f, 0x21, 0xf8, 0xc3 },  /* movl %dr7,%eax; ret */
 145       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 146     { { 0x0f, 0x23, 0xc0, 0xc3 },  /* movl %eax,%dr0; ret */
 147       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 148     { { 0x0f, 0x23, 0xc8, 0xc3 },  /* movl %eax,%dr1; ret */
 149       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 150     { { 0x0f, 0x23, 0xf8, 0xc3 },  /* movl %eax,%dr7; ret */
 151       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 152
 153     /* test memory reads */
 154     { { 0xa1, 0xfc, 0xff, 0xff, 0xff, 0xc3 },  /* movl 0xfffffffc,%eax; ret */
 155       0, 5, STATUS_ACCESS_VIOLATION, 2, { 0, 0xfffffffc } },
 156     { { 0xa1, 0xfd, 0xff, 0xff, 0xff, 0xc3 },  /* movl 0xfffffffd,%eax; ret */
 157       0, 5, STATUS_ACCESS_VIOLATION, 2, { 0, 0xfffffffd } },
 158     { { 0xa1, 0xfe, 0xff, 0xff, 0xff, 0xc3 },  /* movl 0xfffffffe,%eax; ret */
 159       0, 5, STATUS_ACCESS_VIOLATION, 2, { 0, 0xfffffffe } },
 160     { { 0xa1, 0xff, 0xff, 0xff, 0xff, 0xc3 },  /* movl 0xffffffff,%eax; ret */
 161       0, 5, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
 162
 163     /* test memory writes */
 164     { { 0xa3, 0xfc, 0xff, 0xff, 0xff, 0xc3 },  /* movl %eax,0xfffffffc; ret */
 165       0, 5, STATUS_ACCESS_VIOLATION, 2, { 1, 0xfffffffc } },
 166     { { 0xa3, 0xfd, 0xff, 0xff, 0xff, 0xc3 },  /* movl %eax,0xfffffffd; ret */
 167       0, 5, STATUS_ACCESS_VIOLATION, 2, { 1, 0xfffffffd } },
 168     { { 0xa3, 0xfe, 0xff, 0xff, 0xff, 0xc3 },  /* movl %eax,0xfffffffe; ret */
 169       0, 5, STATUS_ACCESS_VIOLATION, 2, { 1, 0xfffffffe } },
 170     { { 0xa3, 0xff, 0xff, 0xff, 0xff, 0xc3 },  /* movl %eax,0xffffffff; ret */
 171       0, 5, STATUS_ACCESS_VIOLATION, 2, { 1, 0xffffffff } },
 172 };
 173
 174 static int got_exception;
 175 static BOOL have_vectored_api;
 176
 177 static void run_exception_test(void *handler, const void* context,
 178                                const void *code, unsigned int code_size)
 179 {
 180     struct {
 181         EXCEPTION_REGISTRATION_RECORD frame;
 182         const void *context;
 183     } exc_frame;
 184     void (*func)(void) = code_mem;
 185
 186     exc_frame.frame.Handler = handler;
 187     exc_frame.frame.Prev = pNtCurrentTeb()->Tib.ExceptionList;
 188     exc_frame.context = context;
 189
 190     memcpy(code_mem, code, code_size);
 191
 192     pNtCurrentTeb()->Tib.ExceptionList = &exc_frame.frame;
 193     func();
 194     pNtCurrentTeb()->Tib.ExceptionList = exc_frame.frame.Prev;
 195 }
 196
 197 LONG CALLBACK rtlraiseexception_vectored_handler(EXCEPTION_POINTERS *ExceptionInfo)
 198 {
 199     PCONTEXT context = ExceptionInfo->ContextRecord;
 200     PEXCEPTION_RECORD rec = ExceptionInfo->ExceptionRecord;
 201     trace("vect. handler %08x addr:%p context.Eip:%x\n", rec->ExceptionCode,
 202           rec->ExceptionAddress, context->Eip);
 203
 204     todo_wine {
 205     ok(rec->ExceptionAddress == (char *)code_mem + 0xb, "ExceptionAddress at %p instead of %p\n",
 206        rec->ExceptionAddress, (char *)code_mem + 0xb);
 207
 208     if (pNtCurrentTeb()->Peb->BeingDebugged)
 209         ok((void *)context->Eax == pRtlRaiseException, "debugger managed to modify Eax to %x should be %p\n",
 210            context->Eax, pRtlRaiseException);
 211     }
 212
 213     /* check that context.Eip is fixed up only for EXCEPTION_BREAKPOINT
 214      * even if raised by RtlRaiseException
 215      */
 216     if(rec->ExceptionCode == EXCEPTION_BREAKPOINT)
 217     {
 218         ok(context->Eip == (DWORD)code_mem + 0xa, "Eip at %x instead of %x\n",
 219            context->Eip, (DWORD)code_mem + 0xa);
 220     }
 221     else
 222     {
 223         ok(context->Eip == (DWORD)code_mem + 0xb, "Eip at %x instead of %x\n",
 224            context->Eip, (DWORD)code_mem + 0xb);
 225     }
 226
 227     /* test if context change is preserved from vectored handler to stack handlers */
 228     context->Eax = 0xf00f00f0;
 229     return EXCEPTION_CONTINUE_SEARCH;
 230 }
 231
 232 static DWORD rtlraiseexception_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
 233                       CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
 234 {
 235     trace( "exception: %08x flags:%x addr:%p context: Eip:%x\n",
 236            rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress, context->Eip );
 237
 238     todo_wine {
 239     ok(rec->ExceptionAddress == (char *)code_mem + 0xb, "ExceptionAddress at %p instead of %p\n",
 240        rec->ExceptionAddress, (char *)code_mem + 0xb);
 241     }
 242
 243     /* check that context.Eip is fixed up only for EXCEPTION_BREAKPOINT
 244      * even if raised by RtlRaiseException
 245      */
 246     if(rec->ExceptionCode == EXCEPTION_BREAKPOINT)
 247     {
 248         ok(context->Eip == (DWORD)code_mem + 0xa, "Eip at %x instead of %x\n",
 249            context->Eip, (DWORD)code_mem + 0xa);
 250     }
 251     else
 252     {
 253         ok(context->Eip == (DWORD)code_mem + 0xb, "Eip at %x instead of %x\n",
 254            context->Eip, (DWORD)code_mem + 0xb);
 255     }
 256
 257     if(have_vectored_api)
 258         ok(context->Eax == 0xf00f00f0, "Eax is %x, should have been set to 0xf00f00f0 in vectored handler\n",
 259            context->Eax);
 260
 261     /* give the debugger a chance to examine the state a second time */
 262     /* without the exception handler changing Eip */
 263     if (test_stage == 2)
 264         return ExceptionContinueSearch;
 265
 266     /* Eip in context is decreased by 1
 267      * Increase it again, else execution will continue in the middle of a instruction */
 268     if(rec->ExceptionCode == EXCEPTION_BREAKPOINT && (context->Eip == (DWORD)code_mem + 0xa))
 269         context->Eip += 1;
 270     return ExceptionContinueExecution;
 271 }
 272
 273
 274 static const BYTE call_one_arg_code[] = {
 275         0x8b, 0x44, 0x24, 0x08, /* mov 0x8(%esp),%eax */
 276         0x50,                   /* push %eax */
 277         0x8b, 0x44, 0x24, 0x08, /* mov 0x8(%esp),%eax */
 278         0xff, 0xd0,             /* call *%eax */
 279         0x90,                   /* nop */
 280         0x90,                   /* nop */
 281         0x90,                   /* nop */
 282         0x90,                   /* nop */
 283         0xc3,                   /* ret */
 284 };
 285
 286
 287 static void run_rtlraiseexception_test(DWORD exceptioncode)
 288 {
 289     EXCEPTION_REGISTRATION_RECORD frame;
 290     EXCEPTION_RECORD record;
 291     PVOID vectored_handler = NULL;
 292
 293     void (*func)(void* function, EXCEPTION_RECORD* record) = code_mem;
 294
 295     record.ExceptionCode = exceptioncode;
 296     record.ExceptionFlags = 0;
 297     record.ExceptionRecord = NULL;
 298     record.ExceptionAddress = NULL; /* does not matter, copied return address */
 299     record.NumberParameters = 0;
 300
 301     frame.Handler = rtlraiseexception_handler;
 302     frame.Prev = pNtCurrentTeb()->Tib.ExceptionList;
 303
 304     memcpy(code_mem, call_one_arg_code, sizeof(call_one_arg_code));
 305
 306     pNtCurrentTeb()->Tib.ExceptionList = &frame;
 307     if (have_vectored_api)
 308     {
 309         vectored_handler = pRtlAddVectoredExceptionHandler(TRUE, &rtlraiseexception_vectored_handler);
 310         ok(vectored_handler != 0, "RtlAddVectoredExceptionHandler failed\n");
 311     }
 312
 313     func(pRtlRaiseException, &record);
 314
 315     if (have_vectored_api)
 316         pRtlRemoveVectoredExceptionHandler(vectored_handler);
 317     pNtCurrentTeb()->Tib.ExceptionList = frame.Prev;
 318 }
 319
 320 static void test_rtlraiseexception(void)
 321 {
 322     if (!pRtlRaiseException)
 323     {
 324         skip("RtlRaiseException not found\n");
 325         return;
 326     }
 327
 328     /* test without debugger */
 329     run_rtlraiseexception_test(0x12345);
 330     run_rtlraiseexception_test(EXCEPTION_BREAKPOINT);
 331     run_rtlraiseexception_test(EXCEPTION_INVALID_HANDLE);
 332 }
 333
 334 static DWORD handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
 335                       CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
 336 {
 337     const struct exception *except = *(const struct exception **)(frame + 1);
 338     unsigned int i, entry = except - exceptions;
 339
 340     got_exception++;
 341     trace( "exception: %x flags:%x addr:%p\n",
 342            rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
 343
 344     ok( rec->ExceptionCode == except->status,
 345         "%u: Wrong exception code %x/%x\n", entry, rec->ExceptionCode, except->status );
 346     ok( rec->ExceptionAddress == (char*)code_mem + except->offset,
 347         "%u: Wrong exception address %p/%p\n", entry,
 348         rec->ExceptionAddress, (char*)code_mem + except->offset );
 349
 350     ok( rec->NumberParameters == except->nb_params,
 351         "%u: Wrong number of parameters %u/%u\n", entry, rec->NumberParameters, except->nb_params );
 352
 353     /* Most CPUs (except Intel Core apparently) report a segment limit violation */
 354     /* instead of page faults for accesses beyond 0xffffffff */
 355     if (except->nb_params == 2 && except->params[1] >= 0xfffffffd)
 356     {
 357         if (rec->ExceptionInformation[0] == 0 && rec->ExceptionInformation[1] == 0xffffffff)
 358             goto skip_params;
 359     }
 360
 361     for (i = 0; i < rec->NumberParameters; i++)
 362         ok( rec->ExceptionInformation[i] == except->params[i],
 363             "%u: Wrong parameter %d: %lx/%x\n",
 364             entry, i, rec->ExceptionInformation[i], except->params[i] );
 365
 366 skip_params:
 367     /* don't handle exception if it's not the address we expected */
 368     if (rec->ExceptionAddress != (char*)code_mem + except->offset) return ExceptionContinueSearch;
 369
 370     context->Eip += except->length;
 371     return ExceptionContinueExecution;
 372 }
 373
 374 static void test_prot_fault(void)
 375 {
 376     unsigned int i;
 377
 378     for (i = 0; i < sizeof(exceptions)/sizeof(exceptions[0]); i++)
 379     {
 380         got_exception = 0;
 381         run_exception_test(handler, &exceptions[i], &exceptions[i].code,
 382                            sizeof(exceptions[i].code));
 383         if (!i && !got_exception)
 384         {
 385             trace( "No exception, assuming win9x, no point in testing further\n" );
 386             break;
 387         }
 388         ok( got_exception == (exceptions[i].status != 0),
 389             "%u: bad exception count %d\n", i, got_exception );
 390     }
 391 }
 392
 393 /* test handling of debug registers */
 394 static DWORD dreg_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
 395                       CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
 396 {
 397     context->Eip += 2;  /* Skips the popl (%eax) */
 398     context->Dr0 = 0x42424242;
 399     context->Dr1 = 0;
 400     context->Dr2 = 0;
 401     context->Dr3 = 0;
 402     context->Dr6 = 0;
 403     context->Dr7 = 0x155;
 404     return ExceptionContinueExecution;
 405 }
 406
 407 static const BYTE segfault_code[5] = {
 408         0x31, 0xc0, /* xor    %eax,%eax */
 409         0x8f, 0x00, /* popl   (%eax) - cause exception */
 410         0xc3        /* ret */
 411 };
 412
 413 /* test the single step exception behaviour */
 414 static DWORD single_step_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
 415                                   CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
 416 {
 417     got_exception++;
 418     ok (!(context->EFlags & 0x100), "eflags has single stepping bit set\n");
 419
 420     if( got_exception < 3)
 421         context->EFlags |= 0x100;  /* single step until popf instruction */
 422     else {
 423         /* show that the last single step exception on the popf instruction
 424          * (which removed the TF bit), still is a EXCEPTION_SINGLE_STEP exception */
 425         ok( rec->ExceptionCode == EXCEPTION_SINGLE_STEP,
 426             "exception is not EXCEPTION_SINGLE_STEP: %x\n", rec->ExceptionCode);
 427     }
 428
 429     return ExceptionContinueExecution;
 430 }
 431
 432 static const BYTE single_stepcode[] = {
 433     0x9c,               /* pushf */
 434     0x58,               /* pop   %eax */
 435     0x0d,0,1,0,0,       /* or    $0x100,%eax */
 436     0x50,               /* push   %eax */
 437     0x9d,               /* popf    */
 438     0x35,0,1,0,0,       /* xor    $0x100,%eax */
 439     0x50,               /* push   %eax */
 440     0x9d,               /* popf    */
 441     0xc3
 442 };
 443
 444 /* Test the alignment check (AC) flag handling. */
 445 static const BYTE align_check_code[] = {
 446     0x55,                       /* push   %ebp */
 447     0x89,0xe5,                  /* mov    %esp,%ebp */
 448     0x9c,                       /* pushf   */
 449     0x58,                       /* pop    %eax */
 450     0x0d,0,0,4,0,               /* or     $0x40000,%eax */
 451     0x50,                       /* push   %eax */
 452     0x9d,                       /* popf    */
 453     0x89,0xe0,                  /* mov %esp, %eax */
 454     0x8b,0x40,0x1,              /* mov 0x1(%eax), %eax - cause exception */
 455     0x9c,                       /* pushf   */
 456     0x58,                       /* pop    %eax */
 457     0x35,0,0,4,0,               /* xor    $0x40000,%eax */
 458     0x50,                       /* push   %eax */
 459     0x9d,                       /* popf    */
 460     0x5d,                       /* pop    %ebp */
 461     0xc3,                       /* ret     */
 462 };
 463
 464 static DWORD align_check_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
 465                                   CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
 466 {
 467     ok (!(context->EFlags & 0x40000), "eflags has AC bit set\n");
 468     got_exception++;
 469     return ExceptionContinueExecution;
 470 }
 471
 472 /* test single stepping over hardware breakpoint */
 473 static DWORD bpx_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
 474                           CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
 475 {
 476     got_exception++;
 477     ok( rec->ExceptionCode == EXCEPTION_SINGLE_STEP,
 478         "wrong exception code: %x\n", rec->ExceptionCode);
 479
 480     if(got_exception == 1) {
 481         /* hw bp exception on first nop */
 482         ok( context->Eip == (DWORD)code_mem, "eip is wrong:  %x instead of %x\n",
 483                                              context->Eip, (DWORD)code_mem);
 484         ok( (context->Dr6 & 0xf) == 1, "B0 flag is not set in Dr6\n");
 485         ok( !(context->Dr6 & 0x4000), "BS flag is set in Dr6\n");
 486         context->Dr0 = context->Dr0 + 1;  /* set hw bp again on next instruction */
 487         context->EFlags |= 0x100;       /* enable single stepping */
 488     } else if(  got_exception == 2) {
 489         /* single step exception on second nop */
 490         ok( context->Eip == (DWORD)code_mem + 1, "eip is wrong: %x instead of %x\n",
 491                                                  context->Eip, (DWORD)code_mem + 1);
 492         todo_wine{ ok( (context->Dr6 & 0x4000), "BS flag is not set in Dr6\n"); };
 493        /* depending on the win version the B0 bit is already set here as well
 494         ok( (context->Dr6 & 0xf) == 0, "B0...3 flags in Dr6 shouldn't be set\n"); */
 495         context->EFlags |= 0x100;
 496     } else if( got_exception == 3) {
 497         /* hw bp exception on second nop */
 498         ok( context->Eip == (DWORD)code_mem + 1, "eip is wrong: %x instead of %x\n",
 499                                                  context->Eip, (DWORD)code_mem + 1);
 500         todo_wine{ ok( (context->Dr6 & 0xf) == 1, "B0 flag is not set in Dr6\n"); };
 501         ok( !(context->Dr6 & 0x4000), "BS flag is set in Dr6\n");
 502         context->Dr0 = 0;       /* clear breakpoint */
 503         context->EFlags |= 0x100;
 504     } else {
 505         /* single step exception on ret */
 506         ok( context->Eip == (DWORD)code_mem + 2, "eip is wrong: %x instead of %x\n",
 507                                                  context->Eip, (DWORD)code_mem + 2);
 508         ok( (context->Dr6 & 0xf) == 0, "B0...3 flags in Dr6 shouldn't be set\n");
 509         todo_wine{ ok( (context->Dr6 & 0x4000), "BS flag is not set in Dr6\n"); };
 510     }
 511
 512     context->Dr6 = 0;  /* clear status register */
 513     return ExceptionContinueExecution;
 514 }
 515
 516 static const BYTE dummy_code[] = { 0x90, 0x90, 0xc3 };  /* nop, nop, ret */
 517
 518 /* test int3 handling */
 519 static DWORD int3_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
 520                            CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
 521 {
 522     ok( rec->ExceptionAddress == code_mem, "exception address not at: %p, but at %p\n",
 523                                            code_mem,  rec->ExceptionAddress);
 524     ok( context->Eip == (DWORD)code_mem, "eip not at: %p, but at %#x\n", code_mem, context->Eip);
 525     if(context->Eip == (DWORD)code_mem) context->Eip++; /* skip breakpoint */
 526
 527     return ExceptionContinueExecution;
 528 }
 529
 530 static const BYTE int3_code[] = { 0xCC, 0xc3 };  /* int 3, ret */
 531
 532
 533 static void test_exceptions(void)
 534 {
 535     CONTEXT ctx;
 536     NTSTATUS res;
 537
 538     if (!pNtGetContextThread || !pNtSetContextThread)
 539     {
 540         skip( "NtGetContextThread/NtSetContextThread not found\n" );
 541         return;
 542     }
 543
 544     /* test handling of debug registers */
 545     run_exception_test(dreg_handler, NULL, &segfault_code, sizeof(segfault_code));
 546
 547     ctx.ContextFlags = CONTEXT_DEBUG_REGISTERS;
 548     res = pNtGetContextThread(GetCurrentThread(), &ctx);
 549     ok (res == STATUS_SUCCESS,"NtGetContextThread failed with %x\n", res);
 550     ok(ctx.Dr0 == 0x42424242,"failed to set debugregister 0 to 0x42424242, got %x\n", ctx.Dr0);
 551     ok((ctx.Dr7 & ~0xdc00) == 0x155,"failed to set debugregister 7 to 0x155, got %x\n", ctx.Dr7);
 552
 553     /* test single stepping behavior */
 554     got_exception = 0;
 555     run_exception_test(single_step_handler, NULL, &single_stepcode, sizeof(single_stepcode));
 556     ok(got_exception == 3, "expected 3 single step exceptions, got %d\n", got_exception);
 557
 558     /* test alignment exceptions */
 559     got_exception = 0;
 560     run_exception_test(align_check_handler, NULL, align_check_code, sizeof(align_check_code));
 561     ok(got_exception == 0, "got %d alignment faults, expected 0\n", got_exception);
 562
 563     /* test single stepping over hardware breakpoint */
 564     memset(&ctx, 0, sizeof(ctx));
 565     ctx.Dr0 = (DWORD) code_mem;  /* set hw bp on first nop */
 566     ctx.Dr7 = 3;
 567     ctx.ContextFlags = CONTEXT_DEBUG_REGISTERS;
 568     res = pNtSetContextThread( GetCurrentThread(), &ctx);
 569     ok( res == STATUS_SUCCESS, "NtSetContextThread faild with %x\n", res);
 570
 571     got_exception = 0;
 572     run_exception_test(bpx_handler, NULL, dummy_code, sizeof(dummy_code));
 573     ok( got_exception == 4,"expected 4 exceptions, got %d\n", got_exception);
 574
 575     /* test int3 handling */
 576     run_exception_test(int3_handler, NULL, int3_code, sizeof(int3_code));
 577 }
 578
 579 static void test_debugger(void)
 580 {
 581     char cmdline[MAX_PATH];
 582     PROCESS_INFORMATION pi;
 583     STARTUPINFO si = { 0 };
 584     DEBUG_EVENT de;
 585     DWORD continuestatus;
 586     PVOID code_mem_address = NULL;
 587     NTSTATUS status;
 588     SIZE_T size_read;
 589     BOOL ret;
 590     int counter = 0;
 591     si.cb = sizeof(si);
 592
 593     if(!pNtGetContextThread || !pNtSetContextThread || !pNtReadVirtualMemory || !pNtTerminateProcess)
 594     {
 595         skip("NtGetContextThread, NtSetContextThread, NtReadVirtualMemory or NtTerminateProcess not found\n)");
 596         return;
 597     }
 598
 599     sprintf(cmdline, "%s %s %s", my_argv[0], my_argv[1], "debuggee");
 600     ret = CreateProcess(NULL, cmdline, NULL, NULL, FALSE, DEBUG_PROCESS, NULL, NULL, &si, &pi);
 601     ok(ret, "could not create child process error: %u\n", GetLastError());
 602     if (!ret)
 603         return;
 604
 605     do
 606     {
 607         continuestatus = DBG_CONTINUE;
 608         ok(WaitForDebugEvent(&de, INFINITE), "reading debug event\n");
 609
 610         if (de.dwThreadId != pi.dwThreadId)
 611         {
 612             trace("event %d not coming from main thread, ignoring\n", de.dwDebugEventCode);
 613             ContinueDebugEvent(de.dwProcessId, de.dwThreadId, DBG_CONTINUE);
 614             continue;
 615         }
 616
 617         if (de.dwDebugEventCode == CREATE_PROCESS_DEBUG_EVENT)
 618         {
 619             if(de.u.CreateProcessInfo.lpBaseOfImage != pNtCurrentTeb()->Peb->ImageBaseAddress)
 620             {
 621                 skip("child process loaded at different address, terminating it\n");
 622                 pNtTerminateProcess(pi.hProcess, 1);
 623             }
 624         }
 625         else if (de.dwDebugEventCode == EXCEPTION_DEBUG_EVENT)
 626         {
 627             CONTEXT ctx;
 628             int stage;
 629
 630             counter++;
 631             status = pNtReadVirtualMemory(pi.hProcess, &code_mem, &code_mem_address,
 632                                           sizeof(code_mem_address), &size_read);
 633             ok(!status,"NtReadVirtualMemory failed with 0x%x\n", status);
 634             status = pNtReadVirtualMemory(pi.hProcess, &test_stage, &stage,
 635                                           sizeof(stage), &size_read);
 636             ok(!status,"NtReadVirtualMemory failed with 0x%x\n", status);
 637
 638             ctx.ContextFlags = CONTEXT_FULL;
 639             status = pNtGetContextThread(pi.hThread, &ctx);
 640             ok(!status, "NtGetContextThread failed with 0x%x\n", status);
 641
 642             trace("exception 0x%x at %p firstchance=%d Eip=0x%x, Eax=0x%x\n",
 643                   de.u.Exception.ExceptionRecord.ExceptionCode,
 644                   de.u.Exception.ExceptionRecord.ExceptionAddress, de.u.Exception.dwFirstChance, ctx.Eip, ctx.Eax);
 645
 646             if (counter > 100)
 647             {
 648                 ok(FALSE, "got way too many exceptions, probaby caught in a infinite loop, terminating child\n");
 649                 pNtTerminateProcess(pi.hProcess, 1);
 650             }
 651             else if (counter >= 2) /* skip startup breakpoint */
 652             {
 653                 if (stage == 1)
 654                 {
 655                     ok((char *)ctx.Eip == (char *)code_mem_address + 0xb, "Eip at %x instead of %p\n",
 656                        ctx.Eip, (char *)code_mem_address + 0xb);
 657                     /* setting the context from debugger does not affect the context, the exception handlers gets */
 658                     /* uncomment once wine is fixed */
 659                     /* ctx.Eip = 0x12345; */
 660                     ctx.Eax = 0xf00f00f1;
 661
 662                     /* let the debuggee handle the exception */
 663                     continuestatus = DBG_EXCEPTION_NOT_HANDLED;
 664                 }
 665                 else if (stage == 2)
 666                 {
 667                     if (de.u.Exception.dwFirstChance)
 668                     {
 669                         /* debugger gets first chance exception with unmodified ctx.Eip */
 670                         ok((char *)ctx.Eip == (char *)code_mem_address + 0xb, "Eip at 0x%x instead of %p\n",
 671                             ctx.Eip, (char *)code_mem_address + 0xb);
 672
 673                         /* setting the context from debugger does not affect the context, the exception handlers gets */
 674                         /* uncomment once wine is fixed */
 675                         /* ctx.Eip = 0x12345; */
 676                         ctx.Eax = 0xf00f00f1;
 677
 678                         /* pass exception to debuggee
 679                          * exception will not be handled and
 680                          * a second chance exception will be raised */
 681                         continuestatus = DBG_EXCEPTION_NOT_HANDLED;
 682                     }
 683                     else
 684                     {
 685                         /* debugger gets context after exception handler has played with it */
 686                         /* ctx.Eip is the same value the exception handler got */
 687                         if (de.u.Exception.ExceptionRecord.ExceptionCode == EXCEPTION_BREAKPOINT)
 688                         {
 689                             ok((char *)ctx.Eip == (char *)code_mem_address + 0xa, "Eip at 0x%x instead of %p\n",
 690                                 ctx.Eip, (char *)code_mem_address + 0xa);
 691                             /* need to fixup Eip for debuggee */
 692                             if ((char *)ctx.Eip == (char *)code_mem_address + 0xa)
 693                                 ctx.Eip += 1;
 694                         }
 695                         else
 696                             ok((char *)ctx.Eip == (char *)code_mem_address + 0xb, "Eip at 0x%x instead of %p\n",
 697                                 ctx.Eip, (char *)code_mem_address + 0xb);
 698                         /* here we handle exception */
 699                     }
 700                 }
 701                 else
 702                     ok(FALSE, "unexpected stage %d\n", stage);
 703
 704                 status = pNtSetContextThread(pi.hThread, &ctx);
 705                 ok(!status, "NtSetContextThread failed with 0x%x\n", status);
 706             }
 707         }
 708
 709         ContinueDebugEvent(de.dwProcessId, de.dwThreadId, continuestatus);
 710
 711     } while (de.dwDebugEventCode != EXIT_PROCESS_DEBUG_EVENT);
 712
 713     ok(CloseHandle(pi.hThread) != 0, "error %u\n", GetLastError());
 714     ok(CloseHandle(pi.hProcess) != 0, "error %u\n", GetLastError());
 715
 716     return;
 717 }
 718
 719 static DWORD simd_fault_handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
 720                                  CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
 721 {
 722     int *stage = *(int **)(frame + 1);
 723
 724     got_exception++;
 725
 726     if( *stage == 1) {
 727         /* fault while executing sse instruction */
 728         context->Eip += 3; /* skip addps */
 729         return ExceptionContinueExecution;
 730     }
 731
 732     /* stage 2 - divide by zero fault */
 733     if( rec->ExceptionCode == EXCEPTION_ILLEGAL_INSTRUCTION)
 734         skip("system doesn't support SIMD exceptions\n");
 735     else {
 736         ok( rec->ExceptionCode ==  STATUS_FLOAT_MULTIPLE_TRAPS,
 737             "exception code: %#x, should be %#x\n",
 738             rec->ExceptionCode,  STATUS_FLOAT_MULTIPLE_TRAPS);
 739         ok( rec->NumberParameters == 1, "# of params: %i, should be 1\n",
 740             rec->NumberParameters);
 741         if( rec->NumberParameters == 1 )
 742             ok( rec->ExceptionInformation[0] == 0, "param #1: %lx, should be 0\n", rec->ExceptionInformation[0]);
 743     }
 744
 745     context->Eip += 3; /* skip divps */
 746
 747     return ExceptionContinueExecution;
 748 }
 749
 750 static const BYTE simd_exception_test[] = {
 751     0x83, 0xec, 0x4,                     /* sub $0x4, %esp       */
 752     0x0f, 0xae, 0x1c, 0x24,              /* stmxcsr (%esp)       */
 753     0x66, 0x81, 0x24, 0x24, 0xff, 0xfd,  /* andw $0xfdff,(%esp)  * enable divide by */
 754     0x0f, 0xae, 0x14, 0x24,              /* ldmxcsr (%esp)       * zero exceptions  */
 755     0x6a, 0x01,                          /* push   $0x1          */
 756     0x6a, 0x01,                          /* push   $0x1          */
 757     0x6a, 0x01,                          /* push   $0x1          */
 758     0x6a, 0x01,                          /* push   $0x1          */
 759     0x0f, 0x10, 0x0c, 0x24,              /* movups (%esp),%xmm1  * fill dividend  */
 760     0x0f, 0x57, 0xc0,                    /* xorps  %xmm0,%xmm0   * clear divisor  */
 761     0x0f, 0x5e, 0xc8,                    /* divps  %xmm0,%xmm1   * generate fault */
 762     0x83, 0xc4, 0x10,                    /* add    $0x10,%esp    */
 763     0x66, 0x81, 0x0c, 0x24, 0x00, 0x02,  /* orw    $0x200,(%esp) * disable exceptions */
 764     0x0f, 0xae, 0x14, 0x24,              /* ldmxcsr (%esp)       */
 765     0x83, 0xc4, 0x04,                    /* add    $0x4,%esp     */
 766     0xc3,                                /* ret */
 767 };
 768
 769 static const BYTE sse_check[] = {
 770     0x0f, 0x58, 0xc8,                    /* addps  %xmm0,%xmm1 */
 771     0xc3,                                /* ret */
 772 };
 773
 774 static void test_simd_exceptions(void)
 775 {
 776     int stage;
 777
 778     /* test if CPU & OS can do sse */
 779     stage = 1;
 780     got_exception = 0;
 781     run_exception_test(simd_fault_handler, &stage, sse_check, sizeof(sse_check));
 782     if(got_exception) {
 783         skip("system doesn't support SSE\n");
 784         return;
 785     }
 786
 787     /* generate a SIMD exception */
 788     stage = 2;
 789     got_exception = 0;
 790     run_exception_test(simd_fault_handler, &stage, simd_exception_test,
 791                        sizeof(simd_exception_test));
 792     ok( got_exception == 1, "got exception: %i, should be 1\n", got_exception);
 793 }
 794
 795 #endif  /* __i386__ */
 796
 797 START_TEST(exception)
 798 {
 799 #ifdef __i386__
 800     HMODULE hntdll = GetModuleHandleA("ntdll.dll");
 801
 802     pNtCurrentTeb        = (void *)GetProcAddress( hntdll, "NtCurrentTeb" );
 803     pNtGetContextThread  = (void *)GetProcAddress( hntdll, "NtGetContextThread" );
 804     pNtSetContextThread  = (void *)GetProcAddress( hntdll, "NtSetContextThread" );
 805     pNtReadVirtualMemory = (void *)GetProcAddress( hntdll, "NtReadVirtualMemory" );
 806     pRtlRaiseException   = (void *)GetProcAddress( hntdll, "RtlRaiseException" );
 807     pNtTerminateProcess  = (void *)GetProcAddress( hntdll, "NtTerminateProcess" );
 808     pRtlAddVectoredExceptionHandler    = (void *)GetProcAddress( hntdll,
 809                                                                  "RtlAddVectoredExceptionHandler" );
 810     pRtlRemoveVectoredExceptionHandler = (void *)GetProcAddress( hntdll,
 811                                                                  "RtlRemoveVectoredExceptionHandler" );
 812     if (!pNtCurrentTeb)
 813     {
 814         skip( "NtCurrentTeb not found\n" );
 815         return;
 816     }
 817
 818     if (pRtlAddVectoredExceptionHandler && pRtlRemoveVectoredExceptionHandler)
 819         have_vectored_api = TRUE;
 820     else
 821         skip("RtlAddVectoredExceptionHandler or RtlRemoveVectoredExceptionHandler not found\n");
 822
 823     /* 1024 byte should be sufficient */
 824     code_mem = VirtualAlloc(NULL, 1024, MEM_RESERVE | MEM_COMMIT, PAGE_EXECUTE_READWRITE);
 825     if(!code_mem) {
 826         trace("VirtualAlloc failed\n");
 827         return;
 828     }
 829
 830     my_argc = winetest_get_mainargs( &my_argv );
 831     if (my_argc >= 3)
 832     {
 833         /* child must be run under a debugger */
 834         if (!pNtCurrentTeb()->Peb->BeingDebugged)
 835         {
 836             ok(FALSE, "child process not being debugged?\n");
 837             return;
 838         }
 839
 840         if (pRtlRaiseException)
 841         {
 842             test_stage = 1;
 843             run_rtlraiseexception_test(0x12345);
 844             run_rtlraiseexception_test(EXCEPTION_BREAKPOINT);
 845             run_rtlraiseexception_test(EXCEPTION_INVALID_HANDLE);
 846             test_stage = 2;
 847             run_rtlraiseexception_test(0x12345);
 848             run_rtlraiseexception_test(EXCEPTION_BREAKPOINT);
 849             run_rtlraiseexception_test(EXCEPTION_INVALID_HANDLE);
 850         }
 851         else
 852             skip( "RtlRaiseException not found\n" );
 853
 854         /* rest of tests only run in parent */
 855         return;
 856     }
 857
 858     test_prot_fault();
 859     test_exceptions();
 860     test_rtlraiseexception();
 861     test_debugger();
 862     test_simd_exceptions();
 863
 864     VirtualFree(code_mem, 1024, MEM_RELEASE);
 865 #endif
 866 }