source: trunk/src/kernel32/pefile.cpp@ 2007

Last change on this file since 2007 was 1811, checked in by sandervl, 26 years ago

Rewrite of PE loader code, EB's fixes + VirtualProtect bugfix
File size: 5.5 KB
Line 
1/* $Id: pefile.cpp,v 1.6 1999-11-22 20:35:51 sandervl Exp $ */
2
3/*
4 * PE2LX PE utility functions
5 *
6 * Project Odin Software License can be found in LICENSE.TXT
7 *
8 */
9#define INCL_BASE
10#include <os2wrap.h> //Odin32 OS/2 api wrappers
11#include <stdio.h>
12#include <string.h>
13#include <stdlib.h>
14#include <win32type.h>
15#include <pefile.h>
16#include <misc.h>
17#include <winres.h>
18
19//******************************************************************************
20//******************************************************************************
21char *UnicodeToFixedAsciiString(int length, WCHAR *NameString)
22{
23static char asciistring[256];
24int i;
25
26 if(length >= 255) length = 255;
27 for(i=0;i<length;i++) {
28 asciistring[i] = NameString[i] & 0xFF;
29 }
30 asciistring[length] = 0;
31 return(asciistring);
32}
33//******************************************************************************
34//******************************************************************************
35BOOL GetPEFileHeader (LPVOID lpFile, PIMAGE_FILE_HEADER pHeader)
36{
37 if(*(USHORT *)lpFile == IMAGE_DOS_SIGNATURE &&
38 *(DWORD *)PE_HEADER (lpFile) == IMAGE_NT_SIGNATURE)
39 {
40 memcpy ((LPVOID)pHeader, PEHEADEROFF (lpFile), sizeof (IMAGE_FILE_HEADER));
41 return TRUE;
42 }
43 else return FALSE;
44}
45//******************************************************************************
46//******************************************************************************
47BOOL GetPEOptionalHeader (LPVOID lpFile, PIMAGE_OPTIONAL_HEADER pHeader)
48{
49 if(*(USHORT *)lpFile == IMAGE_DOS_SIGNATURE &&
50 *(DWORD *)PE_HEADER (lpFile) == IMAGE_NT_SIGNATURE)
51 {
52 memcpy ((LPVOID)pHeader, OPTHEADEROFF (lpFile), sizeof (IMAGE_OPTIONAL_HEADER));
53 return TRUE;
54 }
55 else return FALSE;
56}
57//******************************************************************************
58//******************************************************************************
59LPVOID ImageDirectoryOffset (LPVOID lpFile, DWORD dwIMAGE_DIRECTORY)
60{
61 PIMAGE_OPTIONAL_HEADER poh = (PIMAGE_OPTIONAL_HEADER)OPTHEADEROFF (lpFile);
62 IMAGE_SECTION_HEADER sh;
63
64 if (dwIMAGE_DIRECTORY >= poh->NumberOfRvaAndSizes)
65 return NULL;
66
67 if(GetSectionHdrByRVA(lpFile, &sh, poh->DataDirectory[dwIMAGE_DIRECTORY].VirtualAddress) == FALSE)
68 {
69 return NULL;
70 }
71
72 return (LPVOID)((ULONG)lpFile + poh->DataDirectory[dwIMAGE_DIRECTORY].VirtualAddress);
73}
74//******************************************************************************
75//******************************************************************************
76BOOL GetSectionHdrByImageDir(LPVOID lpFile, DWORD dwIMAGE_DIRECTORY, PIMAGE_SECTION_HEADER pSect)
77{
78 PIMAGE_OPTIONAL_HEADER poh = (PIMAGE_OPTIONAL_HEADER)OPTHEADEROFF (lpFile);
79
80 if (dwIMAGE_DIRECTORY >= poh->NumberOfRvaAndSizes)
81 return FALSE;
82
83 return GetSectionHdrByRVA(lpFile, pSect, poh->DataDirectory[dwIMAGE_DIRECTORY].VirtualAddress);
84}
85//******************************************************************************
86//******************************************************************************
87BOOL IsImportSection(LPVOID lpFile, PIMAGE_SECTION_HEADER psh)
88{
89 PIMAGE_OPTIONAL_HEADER poh = (PIMAGE_OPTIONAL_HEADER)OPTHEADEROFF (lpFile);
90 int i = 0;
91 DWORD ImageDirVA;
92
93 ImageDirVA = poh->DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT].VirtualAddress;
94
95 if(psh->VirtualAddress <= ImageDirVA &&
96 psh->VirtualAddress + max(psh->Misc.VirtualSize,psh->SizeOfRawData) > ImageDirVA &&
97 strcmp(psh->Name, ".idata") == 0)
98 {
99 return TRUE;
100 }
101 return FALSE;
102}
103//******************************************************************************
104//******************************************************************************
105BOOL GetSectionHdrByName (LPVOID lpFile, IMAGE_SECTION_HEADER *sh, char *szSection)
106{
107 PIMAGE_SECTION_HEADER psh;
108 int nSections = NR_SECTIONS (lpFile);
109 int i;
110
111 if((psh = (PIMAGE_SECTION_HEADER)SECTIONHDROFF (lpFile)) != NULL)
112 {
113 for(i=0; i<nSections; i++)
114 {
115 if(strcmp (psh->Name, szSection) == 0)
116 {
117 memcpy ((LPVOID)sh, (LPVOID)psh, sizeof (IMAGE_SECTION_HEADER));
118 return TRUE;
119 }
120 else psh++;
121 }
122 }
123 return FALSE;
124}
125//******************************************************************************
126//******************************************************************************
127BOOL GetSectionHdrByType (LPVOID lpFile, IMAGE_SECTION_HEADER *sh, int type)
128{
129 PIMAGE_SECTION_HEADER psh;
130 int nSections = NR_SECTIONS (lpFile);
131 int i;
132
133 if((psh = (PIMAGE_SECTION_HEADER)SECTIONHDROFF (lpFile)) != NULL)
134 {
135 for(i=0; i<nSections; i++)
136 {
137 if(psh->Characteristics & type)
138 {
139 memcpy ((LPVOID)sh, (LPVOID)psh, sizeof (IMAGE_SECTION_HEADER));
140 return TRUE;
141 }
142 else psh++;
143 }
144 }
145 return FALSE;
146}
147/** Get Section Header for the given RVA - returns boolean according to the result
148 *
149 * knut [Jul 22 1998 2:53am]
150 */
151BOOL GetSectionHdrByRVA (LPVOID lpFile, IMAGE_SECTION_HEADER *sh, ULONG rva)
152{
153 PIMAGE_SECTION_HEADER psh;
154 int nSections = NR_SECTIONS (lpFile);
155 int i;
156
157 if ((psh = (PIMAGE_SECTION_HEADER)SECTIONHDROFF (lpFile)) != NULL)
158 {
159 for (i=0; i<nSections; i++)
160 {
161 if (rva >= psh->VirtualAddress && rva < psh->VirtualAddress + max(psh->Misc.VirtualSize,psh->SizeOfRawData))
162 {
163 memcpy (sh, psh, sizeof(IMAGE_SECTION_HEADER));
164 return TRUE;
165 }
166 else psh++;
167 }
168 }
169 return FALSE;
170}
171//******************************************************************************
172//******************************************************************************
Note: See TracBrowser for help on using the repository browser.