reactos/lib/rossym/fromfile.c
Timo Kreuzer 9ea495ba33 Create a branch for header work.
svn path=/branches/header-work/; revision=45691
2010-02-26 22:57:55 +00:00

148 lines
4.7 KiB
C

/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS kernel
* FILE: lib/rossym/fromfile.c
* PURPOSE: Creating rossym info from a file
*
* PROGRAMMERS: Ge van Geldorp (gvg@reactos.com)
*/
#define NTOSAPI
#include <ntddk.h>
#include <reactos/rossym.h>
#include "rossympriv.h"
#include <ntimage.h>
#define NDEBUG
#include <debug.h>
BOOLEAN
RosSymCreateFromFile(PVOID FileContext, PROSSYM_INFO *RosSymInfo)
{
IMAGE_DOS_HEADER DosHeader;
IMAGE_NT_HEADERS NtHeaders;
PIMAGE_SECTION_HEADER SectionHeaders, SectionHeader;
unsigned SectionIndex;
char SectionName[IMAGE_SIZEOF_SHORT_NAME];
ROSSYM_HEADER RosSymHeader;
/* Load DOS header */
if (! RosSymReadFile(FileContext, &DosHeader, sizeof(IMAGE_DOS_HEADER)))
{
DPRINT1("Failed to read DOS header\n");
return FALSE;
}
if (! ROSSYM_IS_VALID_DOS_HEADER(&DosHeader))
{
DPRINT1("Image doesn't have a valid DOS header\n");
return FALSE;
}
/* Load NT headers */
if (! RosSymSeekFile(FileContext, DosHeader.e_lfanew))
{
DPRINT1("Failed seeking to NT headers\n");
return FALSE;
}
if (! RosSymReadFile(FileContext, &NtHeaders, sizeof(IMAGE_NT_HEADERS)))
{
DPRINT1("Failed to read NT headers\n");
return FALSE;
}
if (! ROSSYM_IS_VALID_NT_HEADERS(&NtHeaders))
{
DPRINT1("Image doesn't have a valid PE header\n");
return FALSE;
}
/* Load section headers */
if (! RosSymSeekFile(FileContext, (char *) IMAGE_FIRST_SECTION(&NtHeaders) -
(char *) &NtHeaders + DosHeader.e_lfanew))
{
DPRINT1("Failed seeking to section headers\n");
return FALSE;
}
SectionHeaders = RosSymAllocMem(NtHeaders.FileHeader.NumberOfSections
* sizeof(IMAGE_SECTION_HEADER));
if (NULL == SectionHeaders)
{
DPRINT1("Failed to allocate memory for %u section headers\n",
NtHeaders.FileHeader.NumberOfSections);
return FALSE;
}
if (! RosSymReadFile(FileContext, SectionHeaders,
NtHeaders.FileHeader.NumberOfSections
* sizeof(IMAGE_SECTION_HEADER)))
{
RosSymFreeMem(SectionHeaders);
DPRINT1("Failed to read section headers\n");
return FALSE;
}
/* Search for the section header */
strncpy(SectionName, ROSSYM_SECTION_NAME, IMAGE_SIZEOF_SHORT_NAME);
SectionHeader = SectionHeaders;
for (SectionIndex = 0; SectionIndex < NtHeaders.FileHeader.NumberOfSections; SectionIndex++)
{
if (0 == memcmp(SectionName, SectionHeader->Name, IMAGE_SIZEOF_SHORT_NAME))
{
break;
}
SectionHeader++;
}
if (NtHeaders.FileHeader.NumberOfSections <= SectionIndex)
{
RosSymFreeMem(SectionHeaders);
DPRINT("No %s section found\n", ROSSYM_SECTION_NAME);
return FALSE;
}
/* Load rossym header */
if (! RosSymSeekFile(FileContext, SectionHeader->PointerToRawData))
{
RosSymFreeMem(SectionHeaders);
DPRINT1("Failed seeking to section data\n");
return FALSE;
}
RosSymFreeMem(SectionHeaders);
if (! RosSymReadFile(FileContext, &RosSymHeader, sizeof(ROSSYM_HEADER)))
{
DPRINT1("Failed to read rossym header\n");
return FALSE;
}
if (RosSymHeader.SymbolsOffset < sizeof(ROSSYM_HEADER)
|| RosSymHeader.StringsOffset < RosSymHeader.SymbolsOffset + RosSymHeader.SymbolsLength
|| 0 != (RosSymHeader.SymbolsLength % sizeof(ROSSYM_ENTRY)))
{
DPRINT1("Invalid ROSSYM_HEADER\n");
return FALSE;
}
*RosSymInfo = RosSymAllocMem(sizeof(ROSSYM_INFO) - sizeof(ROSSYM_HEADER)
+ RosSymHeader.StringsOffset + RosSymHeader.StringsLength + 1);
if (NULL == *RosSymInfo)
{
DPRINT1("Failed to allocate memory for rossym\n");
return FALSE;
}
(*RosSymInfo)->Symbols = (PROSSYM_ENTRY)((char *) *RosSymInfo + sizeof(ROSSYM_INFO)
- sizeof(ROSSYM_HEADER) + RosSymHeader.SymbolsOffset);
(*RosSymInfo)->SymbolsCount = RosSymHeader.SymbolsLength / sizeof(ROSSYM_ENTRY);
(*RosSymInfo)->Strings = (PCHAR) *RosSymInfo + sizeof(ROSSYM_INFO) - sizeof(ROSSYM_HEADER)
+ RosSymHeader.StringsOffset;
(*RosSymInfo)->StringsLength = RosSymHeader.StringsLength;
if (! RosSymReadFile(FileContext, *RosSymInfo + 1,
RosSymHeader.StringsOffset + RosSymHeader.StringsLength
- sizeof(ROSSYM_HEADER)))
{
DPRINT1("Failed to read rossym headers\n");
return FALSE;
}
/* Make sure the last string is null terminated, we allocated an extra byte for that */
(*RosSymInfo)->Strings[(*RosSymInfo)->StringsLength] = '\0';
return TRUE;
}
/* EOF */