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
  23 #ifndef _WIN32_WINNT
  24 #define _WIN32_WINNT 0x500 /* For NTSTATUS */
  25 #endif
  26
  27 #include "ntstatus.h"
  28 #define WIN32_NO_STATUS
  29 #include "windef.h"
  30 #include "winbase.h"
  31 #include "winnt.h"
  32 #include "winreg.h"
  33 #include "winternl.h"
  34 #include "excpt.h"
  35 #include "wine/test.h"
  36
  37 #ifdef __i386__
  38
  39 static struct _TEB * (WINAPI *pNtCurrentTeb)(void);
  40
  41 /* Test various instruction combinations that cause a protection fault on the i386,
  42  * and check what the resulting exception looks like.
  43  */
  44
  45 static const struct exception
  46 {
  47     BYTE     code[18];   /* asm code */
  48     BYTE     offset;     /* offset of faulting instruction */
  49     BYTE     length;     /* length of faulting instruction */
  50     NTSTATUS status;     /* expected status code */
  51     DWORD    nb_params;  /* expected number of parameters */
  52     DWORD    params[4];  /* expected parameters */
  53 } exceptions[] =
  54 {
  55     /* test some privileged instructions */
  56     { { 0xfb, 0xc3 },  /* sti; ret */
  57       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  58     { { 0x6c, 0xc3 },  /* insb (%dx); ret */
  59       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  60     { { 0x6d, 0xc3 },  /* insl (%dx); ret */
  61       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  62     { { 0x6e, 0xc3 },  /* outsb (%dx); ret */
  63       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  64     { { 0x6f, 0xc3 },  /* outsl (%dx); ret */
  65       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  66     { { 0xe4, 0x11, 0xc3 },  /* inb $0x11,%al; ret */
  67       0, 2, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  68     { { 0xe5, 0x11, 0xc3 },  /* inl $0x11,%eax; ret */
  69       0, 2, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  70     { { 0xe6, 0x11, 0xc3 },  /* outb %al,$0x11; ret */
  71       0, 2, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  72     { { 0xe7, 0x11, 0xc3 },  /* outl %eax,$0x11; ret */
  73       0, 2, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  74     { { 0xed, 0xc3 },  /* inl (%dx),%eax; ret */
  75       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  76     { { 0xee, 0xc3 },  /* outb %al,(%dx); ret */
  77       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  78     { { 0xef, 0xc3 },  /* outl %eax,(%dx); ret */
  79       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  80     { { 0xf4, 0xc3 },  /* hlt; ret */
  81       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  82     { { 0xfa, 0xc3 },  /* cli; ret */
  83       0, 1, STATUS_PRIVILEGED_INSTRUCTION, 0 },
  84
  85     /* test long jump to invalid selector */
  86     { { 0xea, 0, 0, 0, 0, 0, 0, 0xc3 },  /* ljmp $0,$0; ret */
  87       0, 7, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
  88
  89     /* test iret to invalid selector */
  90     { { 0x6a, 0x00, 0x6a, 0x00, 0x6a, 0x00, 0xcf, 0x83, 0xc4, 0x0c, 0xc3 },
  91       /* pushl $0; pushl $0; pushl $0; iret; addl $12,%esp; ret */
  92       6, 1, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
  93
  94     /* test loading an invalid selector */
  95     { { 0xb8, 0xef, 0xbe, 0x00, 0x00, 0x8e, 0xe8, 0xc3 },  /* mov $beef,%ax; mov %ax,%gs; ret */
  96       5, 2, STATUS_ACCESS_VIOLATION, 2, { 0, 0xbee8 } },
  97
  98     /* test accessing a zero selector */
  99     { { 0x06, 0x31, 0xc0, 0x8e, 0xc0, 0x26, 0xa1, 0, 0, 0, 0, 0x07, 0xc3 },
 100           /* push %es; xor %eax,%eax; mov %ax,%es; mov %es:(0),%ax; pop %es */
 101       5, 6, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
 102
 103     /* test moving %cs -> %ss */
 104     { { 0x0e, 0x17, 0x58, 0xc3 },  /* pushl %cs; popl %ss; popl %eax; ret */
 105       1, 1, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
 106
 107     /* test overlong instruction (limit is 16 bytes) */
 108     { { 0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0xfa,0xc3 },
 109       0, 16, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
 110     { { 0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0x64,0xfa,0xc3 },
 111       0, 15, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 112
 113     /* test invalid interrupt */
 114     { { 0xcd, 0xff, 0xc3 },   /* int $0xff; ret */
 115       0, 2, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
 116
 117     /* test moves to/from Crx */
 118     { { 0x0f, 0x20, 0xc0, 0xc3 },  /* movl %cr0,%eax; ret */
 119       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 120     { { 0x0f, 0x20, 0xe0, 0xc3 },  /* movl %cr4,%eax; ret */
 121       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 122     { { 0x0f, 0x22, 0xc0, 0xc3 },  /* movl %eax,%cr0; ret */
 123       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 124     { { 0x0f, 0x22, 0xe0, 0xc3 },  /* movl %eax,%cr4; ret */
 125       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 126
 127     /* test moves to/from Drx */
 128     { { 0x0f, 0x21, 0xc0, 0xc3 },  /* movl %dr0,%eax; ret */
 129       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 130     { { 0x0f, 0x21, 0xc8, 0xc3 },  /* movl %dr1,%eax; ret */
 131       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 132     { { 0x0f, 0x21, 0xf8, 0xc3 },  /* movl %dr7,%eax; ret */
 133       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 134     { { 0x0f, 0x23, 0xc0, 0xc3 },  /* movl %eax,%dr0; ret */
 135       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 136     { { 0x0f, 0x23, 0xc8, 0xc3 },  /* movl %eax,%dr1; ret */
 137       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 138     { { 0x0f, 0x23, 0xf8, 0xc3 },  /* movl %eax,%dr7; ret */
 139       0, 3, STATUS_PRIVILEGED_INSTRUCTION, 0 },
 140
 141     /* test memory reads */
 142     { { 0xa1, 0xfc, 0xff, 0xff, 0xff, 0xc3 },  /* movl 0xfffffffc,%eax; ret */
 143       0, 5, STATUS_ACCESS_VIOLATION, 2, { 0, 0xfffffffc } },
 144     { { 0xa1, 0xfd, 0xff, 0xff, 0xff, 0xc3 },  /* movl 0xfffffffd,%eax; ret */
 145       0, 5, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
 146     { { 0xa1, 0xfe, 0xff, 0xff, 0xff, 0xc3 },  /* movl 0xfffffffe,%eax; ret */
 147       0, 5, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
 148     { { 0xa1, 0xff, 0xff, 0xff, 0xff, 0xc3 },  /* movl 0xffffffff,%eax; ret */
 149       0, 5, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
 150
 151     /* test memory writes */
 152     { { 0xa3, 0xfc, 0xff, 0xff, 0xff, 0xc3 },  /* movl %eax,0xfffffffc; ret */
 153       0, 5, STATUS_ACCESS_VIOLATION, 2, { 1, 0xfffffffc } },
 154     { { 0xa3, 0xfd, 0xff, 0xff, 0xff, 0xc3 },  /* movl %eax,0xfffffffd; ret */
 155       0, 5, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
 156     { { 0xa3, 0xfe, 0xff, 0xff, 0xff, 0xc3 },  /* movl %eax,0xfffffffe; ret */
 157       0, 5, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
 158     { { 0xa3, 0xff, 0xff, 0xff, 0xff, 0xc3 },  /* movl %eax,0xffffffff; ret */
 159       0, 5, STATUS_ACCESS_VIOLATION, 2, { 0, 0xffffffff } },
 160 };
 161
 162 static int got_exception;
 163
 164 static DWORD handler( EXCEPTION_RECORD *rec, EXCEPTION_REGISTRATION_RECORD *frame,
 165                       CONTEXT *context, EXCEPTION_REGISTRATION_RECORD **dispatcher )
 166 {
 167     const struct exception *except = *(const struct exception **)(frame + 1);
 168     unsigned int i, entry = except - exceptions;
 169
 170     got_exception++;
 171     trace( "exception: %lx flags:%lx addr:%p\n",
 172            rec->ExceptionCode, rec->ExceptionFlags, rec->ExceptionAddress );
 173
 174     ok( rec->ExceptionCode == except->status,
 175         "%u: Wrong exception code %lx/%lx\n", entry, rec->ExceptionCode, except->status );
 176     ok( rec->ExceptionAddress == except->code + except->offset,
 177         "%u: Wrong exception address %p/%p\n", entry,
 178         rec->ExceptionAddress, except->code + except->offset );
 179
 180     ok( rec->NumberParameters == except->nb_params,
 181         "%u: Wrong number of parameters %lu/%lu\n", entry, rec->NumberParameters, except->nb_params );
 182     for (i = 0; i < rec->NumberParameters; i++)
 183         ok( rec->ExceptionInformation[i] == except->params[i],
 184             "%u: Wrong parameter %d: %lx/%lx\n",
 185             entry, i, rec->ExceptionInformation[i], except->params[i] );
 186
 187     /* don't handle exception if it's not the address we expected */
 188     if (rec->ExceptionAddress != except->code + except->offset) return ExceptionContinueSearch;
 189
 190     context->Eip += except->length;
 191     return ExceptionContinueExecution;
 192 }
 193
 194 static void test_prot_fault(void)
 195 {
 196     unsigned int i;
 197     struct
 198     {
 199         EXCEPTION_REGISTRATION_RECORD frame;
 200         const struct exception       *except;
 201     } exc_frame;
 202
 203     pNtCurrentTeb = (void *)GetProcAddress( GetModuleHandleA("ntdll.dll"), "NtCurrentTeb" );
 204     if (!pNtCurrentTeb)
 205     {
 206         trace( "NtCurrentTeb not found, skipping tests\n" );
 207         return;
 208     }
 209
 210     exc_frame.frame.Handler = handler;
 211     exc_frame.frame.Prev = pNtCurrentTeb()->Tib.ExceptionList;
 212     pNtCurrentTeb()->Tib.ExceptionList = &exc_frame.frame;
 213     for (i = 0; i < sizeof(exceptions)/sizeof(exceptions[0]); i++)
 214     {
 215         void (*func)(void) = (void *)exceptions[i].code;
 216         exc_frame.except = &exceptions[i];
 217         got_exception = 0;
 218         func();
 219         if (!i && !got_exception)
 220         {
 221             trace( "No exception, assuming win9x, no point in testing further\n" );
 222             break;
 223         }
 224         ok( got_exception == (exceptions[i].status != 0),
 225             "%u: bad exception count %d\n", i, got_exception );
 226     }
 227     pNtCurrentTeb()->Tib.ExceptionList = exc_frame.frame.Prev;
 228 }
 229
 230 #endif  /* __i386__ */
 231
 232 START_TEST(exception)
 233 {
 234 #ifdef __i386__
 235     test_prot_fault();
 236 #endif
 237 }