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