1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
/* $Id$ */
/** @file
* IPRT - No-CRT - Basic allocators, Windows.
*/
/*
* Copyright (C) 2006-2022 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "internal/nocrt.h"
#include <iprt/asm.h>
#include <iprt/asm-amd64-x86.h>
#ifndef IPRT_NOCRT_WITHOUT_FATAL_WRITE
# include <iprt/assert.h>
#endif
#include "internal/compiler-vcc.h"
/*********************************************************************************************************************************
* Structures and Typedefs *
*********************************************************************************************************************************/
/** Variable descriptor. */
typedef struct RTC_VAR_DESC_T
{
int32_t offFrame;
uint32_t cbVar;
const char *pszName;
} RTC_VAR_DESC_T;
/** Frame descriptor. */
typedef struct RTC_FRAME_DESC_T
{
uint32_t cVars;
RTC_VAR_DESC_T const *paVars;
} RTC_FRAME_DESC_T;
#define VARIABLE_MARKER_PRE 0xcccccccc
#define VARIABLE_MARKER_POST 0xcccccccc
/**
* Alloca allocation entry.
* @note For whatever reason the pNext and cb members are misaligned on 64-bit
* targets. 32-bit targets OTOH adds padding to keep the structure size
* and pNext + cb offsets the same.
*/
#pragma pack(4)
typedef struct RTC_ALLOC_ENTRY
{
uint32_t uGuard1;
RTC_ALLOC_ENTRY *pNext;
#if ARCH_BITS == 32
uint32_t pNextPad;
#endif
size_t cb;
#if ARCH_BITS == 32
uint32_t cbPad;
#endif
uint32_t auGuard2[3];
} RTC_ALLOC_ENTRY;
#pragma pack()
#define ALLOCA_FILLER_BYTE 0xcc
#define ALLOCA_FILLER_32 0xcccccccc
/*********************************************************************************************************************************
* External Symbols *
*********************************************************************************************************************************/
extern "C" void __fastcall _RTC_CheckStackVars(uint8_t *pbFrame, RTC_VAR_DESC_T const *pVar); /* nocrt-stack.asm */
extern "C" uintptr_t __security_cookie;
/**
* Initializes the security cookie value.
*
* This must be called as the first thing by the startup code. We must also no
* do anything fancy here.
*/
void rtVccInitSecurityCookie(void) RT_NOEXCEPT
{
__security_cookie = (uintptr_t)ASMReadTSC() ^ (uintptr_t)&__security_cookie;
}
DECLASM(void) _RTC_StackVarCorrupted(uint8_t *pbFrame, RTC_VAR_DESC_T const *pVar)
{
#ifdef IPRT_NOCRT_WITHOUT_FATAL_WRITE
RTAssertMsg2("\n\n!!Stack corruption!!\n\n"
"%p LB %#x - %s\n",
pbFrame + pVar->offFrame, pVar->cbVar, pVar->pszName);
#else
rtNoCrtFatalWriteBegin(RT_STR_TUPLE("\r\n\r\n!!Stack corruption!!\r\n\r\n"));
rtNoCrtFatalWritePtr(pbFrame + pVar->offFrame);
rtNoCrtFatalWrite(RT_STR_TUPLE(" LB "));
rtNoCrtFatalWriteX32(pVar->cbVar);
rtNoCrtFatalWrite(RT_STR_TUPLE(" - "));
rtNoCrtFatalWriteStr(pVar->pszName);
rtNoCrtFatalWriteEnd(RT_STR_TUPLE("\r\n"));
#endif
RT_BREAKPOINT();
}
DECLASM(void) _RTC_SecurityCookieMismatch(uintptr_t uCookie)
{
#ifdef IPRT_NOCRT_WITHOUT_FATAL_WRITE
RTAssertMsg2("\n\n!!Stack cookie corruption!!\n\n"
"expected %p, found %p\n",
__security_cookie, uCookie);
#else
rtNoCrtFatalWriteBegin(RT_STR_TUPLE("\r\n\r\n!!Stack cookie corruption!!\r\n\r\n"
"expected"));
rtNoCrtFatalWritePtr((void *)__security_cookie);
rtNoCrtFatalWrite(RT_STR_TUPLE(", found "));
rtNoCrtFatalWritePtr((void *)uCookie);
rtNoCrtFatalWriteEnd(RT_STR_TUPLE("\r\n"));
#endif
RT_BREAKPOINT();
}
#ifdef RT_ARCH_X86
DECLASM(void) _RTC_CheckEspFailed(uintptr_t uEip, uintptr_t uEsp, uintptr_t uEbp)
{
# ifdef IPRT_NOCRT_WITHOUT_FATAL_WRITE
RTAssertMsg2("\n\n!!ESP check failed!!\n\n"
"eip=%p esp=%p ebp=%p\n",
uEip, uEsp, uEbp);
# else
rtNoCrtFatalWriteBegin(RT_STR_TUPLE("\r\n\r\n!!ESP check failed!!\r\n\r\n"
"eip="));
rtNoCrtFatalWritePtr((void *)uEip);
rtNoCrtFatalWrite(RT_STR_TUPLE(" esp="));
rtNoCrtFatalWritePtr((void *)uEsp);
rtNoCrtFatalWrite(RT_STR_TUPLE(" ebp="));
rtNoCrtFatalWritePtr((void *)uEbp);
rtNoCrtFatalWriteEnd(RT_STR_TUPLE("\r\n"));
# endif
RT_BREAKPOINT();
}
#endif
extern "C" void __cdecl _RTC_UninitUse(const char *pszVar)
{
#ifdef IPRT_NOCRT_WITHOUT_FATAL_WRITE
RTAssertMsg2("\n\n!!Used uninitialized variable %s at %p!!\n\n",
pszVar ? pszVar : "", ASMReturnAddress());
#else
rtNoCrtFatalWriteBegin(RT_STR_TUPLE("\r\n\r\n!!Used uninitialized variable "));
rtNoCrtFatalWriteStr(pszVar);
rtNoCrtFatalWrite(RT_STR_TUPLE(" at "));
rtNoCrtFatalWritePtr(ASMReturnAddress());
rtNoCrtFatalWriteEnd(RT_STR_TUPLE("!!\r\n\r\n"));
#endif
RT_BREAKPOINT();
}
/** @todo reimplement in assembly (feeling too lazy right now). */
extern "C" void __fastcall _RTC_CheckStackVars2(uint8_t *pbFrame, RTC_VAR_DESC_T const *pVar, RTC_ALLOC_ENTRY *pHead)
{
while (pHead)
{
if ( pHead->uGuard1 == ALLOCA_FILLER_32
#if 1 && ARCH_BITS == 32
&& pHead->pNextPad == ALLOCA_FILLER_32
&& pHead->cbPad == ALLOCA_FILLER_32
#endif
&& pHead->auGuard2[0] == ALLOCA_FILLER_32
&& pHead->auGuard2[1] == ALLOCA_FILLER_32
&& pHead->auGuard2[2] == ALLOCA_FILLER_32
&& *(uint32_t const *)((uint8_t const *)pHead + pHead->cb - sizeof(uint32_t)) == ALLOCA_FILLER_32)
{ /* likely */ }
else
{
#ifdef IPRT_NOCRT_WITHOUT_FATAL_WRITE
RTAssertMsg2("\n\n!!Stack corruption (alloca)!!\n\n"
"%p LB %#x\n",
pHead, pHead->cb);
#else
rtNoCrtFatalWriteBegin(RT_STR_TUPLE("\r\n\r\n!!Stack corruption (alloca)!!\r\n\r\n"));
rtNoCrtFatalWritePtr(pHead);
rtNoCrtFatalWrite(RT_STR_TUPLE(" LB "));
rtNoCrtFatalWriteX64(pHead->cb);
rtNoCrtFatalWriteEnd(RT_STR_TUPLE("\r\n"));
#endif
RT_BREAKPOINT();
}
pHead = pHead->pNext;
}
_RTC_CheckStackVars(pbFrame, pVar);
}
|
