[ROSSYM]
[reactos.git] / reactos / lib / rossym / frommem.c
1 /*
2 * COPYRIGHT: See COPYING in the top level directory
3 * PROJECT: ReactOS kernel
4 * FILE: lib/rossym/frommem.c
5 * PURPOSE: Creating rossym info from an in-memory image
6 *
7 * PROGRAMMERS: Ge van Geldorp (gvg@reactos.com)
8 */
9
10 #define NTOSAPI
11 #include <ntdef.h>
12 #include <reactos/rossym.h>
13 #include "rossympriv.h"
14 #include <ntimage.h>
15
16 #define NDEBUG
17 #include <debug.h>
18
19 BOOLEAN
20 RosSymCreateFromMem(PVOID ImageStart, ULONG_PTR ImageSize, PROSSYM_INFO *RosSymInfo)
21 {
22 PIMAGE_DOS_HEADER DosHeader;
23 PIMAGE_NT_HEADERS NtHeaders;
24 PIMAGE_SECTION_HEADER SectionHeader;
25 ULONG SectionIndex;
26 BOOLEAN RosSymSectionFound = FALSE;
27 CHAR SectionName[IMAGE_SIZEOF_SHORT_NAME];
28
29 /* Check if MZ header is valid */
30 DosHeader = (PIMAGE_DOS_HEADER) ImageStart;
31 if (ImageSize < sizeof(IMAGE_DOS_HEADER)
32 || ! ROSSYM_IS_VALID_DOS_HEADER(DosHeader))
33 {
34 DPRINT1("Image doesn't have a valid DOS header\n");
35 return FALSE;
36 }
37
38 /* Locate NT header */
39 NtHeaders = (PIMAGE_NT_HEADERS)((char *) ImageStart + DosHeader->e_lfanew);
40 if (ImageSize < DosHeader->e_lfanew + sizeof(IMAGE_NT_HEADERS)
41 || ! ROSSYM_IS_VALID_NT_HEADERS(NtHeaders))
42 {
43 DPRINT1("Image doesn't have a valid PE header\n");
44 return FALSE;
45 }
46
47 /* Search for the section header */
48 SectionHeader = IMAGE_FIRST_SECTION(NtHeaders);
49 if (ImageSize < (ULONG_PTR)((char *) (SectionHeader + NtHeaders->FileHeader.NumberOfSections)
50 - (char *) ImageStart))
51 {
52 DPRINT1("Image doesn't have valid section headers\n");
53 return FALSE;
54 }
55 strncpy(SectionName, ROSSYM_SECTION_NAME, IMAGE_SIZEOF_SHORT_NAME);
56 for (SectionIndex = 0; SectionIndex < NtHeaders->FileHeader.NumberOfSections; SectionIndex++)
57 {
58 if (0 == memcmp(SectionName, SectionHeader->Name, IMAGE_SIZEOF_SHORT_NAME))
59 {
60 RosSymSectionFound = TRUE;
61 break;
62 }
63 SectionHeader++;
64 }
65
66 if (!RosSymSectionFound)
67 {
68 DPRINT("No %s section found\n", ROSSYM_SECTION_NAME);
69 return FALSE;
70 }
71
72 /* Locate the section itself */
73 if (ImageSize < SectionHeader->PointerToRawData + SectionHeader->SizeOfRawData
74 || SectionHeader->SizeOfRawData < sizeof(ROSSYM_HEADER))
75 {
76 DPRINT("Invalid %s section\n", ROSSYM_SECTION_NAME);
77 return FALSE;
78 }
79
80 if (SectionHeader->VirtualAddress + SectionHeader->Misc.VirtualSize > ImageSize)
81 {
82 DPRINT("Bad %s section virtual size!\n", ROSSYM_SECTION_NAME);
83 return FALSE;
84 }
85
86 /* Load it */
87 return RosSymCreateFromRaw((char *) ImageStart + SectionHeader->VirtualAddress,
88 SectionHeader->SizeOfRawData, RosSymInfo);
89 }
90
91 /* EOF */