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1158 lines
25 KiB
1158 lines
25 KiB
/*++
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Copyright (c) 1989 Microsoft Corporation
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Module Name:
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genxx.c
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Abstract:
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This module implements a program which generates structure offset
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definitions for kernel structures that are accessed in assembly code.
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Author:
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Forrest C. Foltz (forrestf) 20-Jan-98
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To use:
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This program reads an OBJ file generated by the target platform's
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compiler.
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To generate such an OBJ, go to ke\up and do a "nmake UMAPPL=gen<plt>",
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where <plt> is a platform identifier like i386, etc.
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All you need from this latter step is the OBJ, the link phase will not
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succeed which is fine.
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Revision History:
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--*/
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#include <windows.h>
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#include <stdio.h>
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#include <stdlib.h>
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#define SKIP_M4
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#include <genxx.h>
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//
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// Internal structure definitions, macros, constants
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//
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#define ARRAY_SIZE( x ) (sizeof( x ) / sizeof( (x)[0] ))
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typedef struct _OUTPUT_FILE *POUTPUT_FILE;
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typedef struct _OUTPUT_FILE {
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POUTPUT_FILE Next;
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ULONG EnableMask;
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BOOLEAN IncFormat;
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FILE *File;
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} OUTPUT_FILE;
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//
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// Function prototypes follow
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//
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VOID
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ApplyFixupsToImage( VOID );
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VOID
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BuildHeaderFiles(
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STRUC_ELEMENT UNALIGNED *StrucArray
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);
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VOID
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__cdecl
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CheckCondition(
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int Condition,
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const char *format,
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...
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);
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VOID
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AddNewOutputFile(
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PUCHAR RootRelativePath,
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ULONG Flags
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);
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VOID
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AddNewAbsoluteOutputFile(
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PUCHAR AbsolutePath,
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ULONG Flags
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);
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VOID
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CloseOutputFiles( VOID );
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VOID
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_cdecl
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HeaderPrint(
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ULONG EnableFlags,
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ULONG Type,
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...
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);
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PSTRUC_ELEMENT
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FindStructureElementArray(
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PCHAR Buffer,
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ULONG BufferSize
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);
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VOID
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GetEnvironment( VOID );
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PSTRUC_ELEMENT
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LoadObjImage(
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PUCHAR ImagePath
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);
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PCHAR
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StripWhiteSpace(
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PCHAR String
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);
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VOID
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Usage( VOID );
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//
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// Constant tables follow
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//
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const char *PreprocessedFormatStringArray[] = {
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// SEF_EQUATE
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"#define %s 0x%0x\n",
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// SEF_EQUATE64
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"#define %s 0x%016I64x\n",
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// SEF_COMMENT
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"\n"
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"//\n"
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"// %s\n"
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"//\n"
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"\n",
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// SEF_STRING
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"%s\n",
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// SEF_BITFLD
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"#define %s_MASK 0x%I64x\n"
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"#define %s 0x%0x\n",
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// SEF_BITALIAS
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"#define %s 0x%0x\n",
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// SEF_STRUCTURE
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"struct %s {\n"
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" UCHAR fill[ %d ];\n"
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"}; // %s\n"
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};
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const char *Asm386FormatStringArray[] = {
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// SEF_EQUATE
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"%s equ 0%04XH\n",
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// SEF_EQUATE64
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"%s equ 0%016I64XH\n",
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// SEF_COMMENT
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"\n"
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";\n"
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"; %s\n"
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";\n"
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"\n",
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// SEF_STRING
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"%s",
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// SEF_BITFLD
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"%s_MASK equ 0%I64XH\n"
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"%s equ 0%0XH\n",
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// SEF_BITALIAS
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"%s equ 0%08XH\n",
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// SEF_STRUCTURE
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"%s struc\n"
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" db %d dup(0)\n"
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"%s ends\n"
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};
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//
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// Each platform contains a list of generated header files.
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//
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typedef struct {
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PCHAR HeaderPath;
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ULONG Flags;
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} HEADERPATH, *PHEADERPATH;
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HEADERPATH HeaderListi386[] = {
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{ "public\\sdk\\inc\\ks386.inc", SEF_KERNEL | SEF_INC_FORMAT },
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{ "base\\ntos\\inc\\hal386.inc", SEF_HAL | SEF_INC_FORMAT },
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{ NULL, 0 }
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};
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HEADERPATH HeaderListIa64[] = {
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{ "public\\sdk\\inc\\ksia64.h", SEF_KERNEL | SEF_H_FORMAT },
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{ "base\\ntos\\inc\\halia64.h", SEF_HAL | SEF_H_FORMAT },
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{ NULL, 0 }
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};
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HEADERPATH HeaderListVdm[] = {
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{ "public\\internal\\base\\inc\\vdmtib.inc", SEF_INC_FORMAT },
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{ NULL, 0 }
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};
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HEADERPATH HeaderListAmd64[] = {
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{ "public\\sdk\\inc\\ksamd64.inc", SEF_KERNEL | SEF_INC_FORMAT },
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{ "base\\ntos\\inc\\halamd64.inc", SEF_HAL | SEF_INC_FORMAT },
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{ NULL, 0 }
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};
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typedef struct {
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PCHAR PlatformName;
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PCHAR ObjPath;
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PHEADERPATH HeaderPathList;
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} PLATFORM, *PPLATFORM;
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PLATFORM PlatformList[] = {
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{ "i386",
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"base\\ntos\\ke\\up\\obj\\i386\\geni386.obj",
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HeaderListi386 },
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{ "ia64",
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"base\\ntos\\ke\\up\\obj\\ia64\\genia64.obj",
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HeaderListIa64 },
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{ "vdm",
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"base\\ntos\\vdm\\up\\obj\\i386\\genvdm.obj",
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HeaderListVdm },
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{ "amd64",
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"base\\ntos\\ke\\up\\obj\\amd64\\genamd64.obj",
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HeaderListAmd64 },
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{ NULL, NULL, NULL }
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};
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const char MarkerString[] = MARKER_STRING;
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//
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// Global vars follow
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//
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POUTPUT_FILE OutputFileList;
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PCHAR ObjImage;
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CHAR HalHeaderPath[ MAX_PATH ];
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CHAR KernelHeaderPath[ MAX_PATH ];
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CHAR HeaderPath[ MAX_PATH ];
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CHAR ObjectPath[ MAX_PATH ];
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CHAR NtRoot[ MAX_PATH ];
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CHAR TempBuf[ MAX_PATH ];
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BOOL fOutputSpecified;
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BOOL fHalHeaderPath;
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BOOL fKernelHeaderPath;
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BOOL fIncFormat;
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//
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// The actual code...
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//
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int
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__cdecl
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main(
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int argc,
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char *argv[]
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)
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{
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int argNum;
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char *arg;
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int platformIndex;
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int fileIndex;
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BOOL validSwitch;
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PSTRUC_ELEMENT strucArray;
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PPLATFORM platform;
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PHEADERPATH headerPath;
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GetEnvironment();
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//
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// Assume no platform specified, then see if we can find one.
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//
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ObjectPath[ 0 ] = '\0';
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for( argNum = 1; argNum < argc; argNum++ ){
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validSwitch = FALSE;
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arg = argv[ argNum ];
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if( *arg == '/' || *arg == '-' ){
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//
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// A switch was passed. See what it is.
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//
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arg++;
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switch( *arg ){
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case 'o':
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//
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// Specified an output file
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//
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fOutputSpecified = TRUE;
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strcpy( HeaderPath, arg+1 );
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validSwitch = TRUE;
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break;
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case 's':
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//
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// Specified include file suffix (either 'h' or 'inc')
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//
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if( _stricmp( arg+1, "inc" ) == 0 ){
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//
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// We would like the "inc" format, thanks
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//
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fIncFormat = TRUE;
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} else {
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CheckCondition( _stricmp( arg+1, "h" ) == 0,
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"Invalid suffix option: -s[inc|h]\n");
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}
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validSwitch = TRUE;
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break;
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case 'k':
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//
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// Kernel header path. Save off.
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//
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fKernelHeaderPath = TRUE;
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strcpy( KernelHeaderPath, arg+1 );
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validSwitch = TRUE;
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break;
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case 'h':
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//
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// Hal header path. Save off.
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//
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fHalHeaderPath = TRUE;
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strcpy( HalHeaderPath, arg+1 );
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validSwitch = TRUE;
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break;
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default:
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//
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// Check our platform list.
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//
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platform = PlatformList;
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while( platform->PlatformName != NULL ){
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if( _stricmp( platform->PlatformName,
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arg ) == 0 ){
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//
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// Platform was specified, we will build the path to
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// the obj.
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//
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sprintf( ObjectPath,
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"%s\\%s",
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NtRoot,
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platform->ObjPath );
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//
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// Add the header paths too.
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//
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headerPath = platform->HeaderPathList;
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while( headerPath->HeaderPath != NULL ){
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if (fHalHeaderPath && (headerPath->Flags & SEF_HAL)) {
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strcpy(TempBuf, HalHeaderPath);
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AddNewAbsoluteOutputFile( HalHeaderPath, headerPath->Flags );
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} else
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if (fKernelHeaderPath && (headerPath->Flags & SEF_KERNEL)) {
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strcpy(TempBuf, KernelHeaderPath);
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AddNewAbsoluteOutputFile( KernelHeaderPath, headerPath->Flags );
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} else {
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AddNewOutputFile( headerPath->HeaderPath,
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headerPath->Flags );
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}
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headerPath++;
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}
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validSwitch = TRUE;
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break;
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}
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platform++;
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}
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break;
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}
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if( validSwitch == FALSE ){
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Usage();
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}
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} else {
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//
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// We are dealing with something that is not a switch. The only
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// possibility is the path to the object file.
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//
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strcpy( ObjectPath, arg );
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}
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}
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CheckCondition( ObjectPath[0] != '\0',
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"Object path not specified\n" );
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if( fOutputSpecified != FALSE ){
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//
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// The output path was specified
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//
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AddNewAbsoluteOutputFile( HeaderPath,
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fIncFormat ? SEF_INC_FORMAT : SEF_H_FORMAT );
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}
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strucArray = LoadObjImage( ObjectPath );
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BuildHeaderFiles( strucArray );
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CloseOutputFiles();
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//
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// Indicate success.
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//
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return 0;
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}
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VOID
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AddNewAbsoluteOutputFile(
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PUCHAR AbsolutePath,
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ULONG Flags
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)
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{
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POUTPUT_FILE outputFile;
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outputFile = malloc( sizeof( OUTPUT_FILE ));
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CheckCondition( outputFile != NULL, "Out of memory\n" );
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outputFile->EnableMask = (ULONG)(Flags & SEF_ENABLE_MASK);
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if( (Flags & SEF_INC_FORMAT_MASK) == SEF_INC_FORMAT ){
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//
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// This file will be created in '.inc' format for the 386 assembler.
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//
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outputFile->IncFormat = TRUE;
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} else {
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//
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// This file will be created in '.h' format for the standard C
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// preprocessor.
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//
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outputFile->IncFormat = FALSE;
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}
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outputFile->File = fopen( AbsolutePath, "w" );
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CheckCondition( outputFile->File != NULL,
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"Cannot open %s for writing.\n",
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TempBuf );
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printf("%s -> %s\n", ObjectPath, TempBuf );
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//
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// Link this structure into the list of output files
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//
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outputFile->Next = OutputFileList;
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OutputFileList = outputFile;
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}
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VOID
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AddNewOutputFile(
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PUCHAR RootRelativePath,
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ULONG Flags
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)
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{
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//
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// Create the canonoical file path and open the file.
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//
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sprintf( TempBuf,
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"%s\\%s",
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NtRoot,
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RootRelativePath );
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AddNewAbsoluteOutputFile( TempBuf, Flags );
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}
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VOID
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CloseOutputFiles( VOID )
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{
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POUTPUT_FILE outputFile;
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outputFile = OutputFileList;
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while( outputFile != NULL ){
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fclose( outputFile->File );
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outputFile = outputFile->Next;
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}
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}
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PSTRUC_ELEMENT
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LoadObjImage(
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PUCHAR ImagePath
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)
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{
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long objImageSize;
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int result;
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PSTRUC_ELEMENT strucArray;
|
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FILE * objFile;
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//
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// Open up and read the platform-specific .obj file.
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//
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objFile = fopen( ImagePath, "rb" );
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CheckCondition( objFile != NULL,
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"Cannot open %s for reading.\n"
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"This file must have been created by the compiler for the "
|
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"target platform.\n",
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ImagePath );
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//
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// Get the file size, allocate a buffer, read it in, and close.
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//
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result = fseek( objFile, 0, SEEK_END );
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CheckCondition( result == 0,
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"fseek() failed, error %d\n",
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errno );
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objImageSize = ftell( objFile );
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CheckCondition( objImageSize != -1L,
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"ftell() failed, error %d\n",
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errno );
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CheckCondition( objImageSize > 0,
|
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"%s appears to be corrupt\n",
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ImagePath );
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ObjImage = malloc( objImageSize );
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CheckCondition( ObjImage != NULL,
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"Out of memory\n" );
|
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result = fseek( objFile, 0, SEEK_SET );
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CheckCondition( result == 0,
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"fseek() failed, error %d\n",
|
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errno );
|
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result = fread( ObjImage, 1, objImageSize, objFile );
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CheckCondition( result == objImageSize,
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"Error reading from %s\n",
|
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ImagePath );
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|
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fclose( objFile );
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|
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//
|
|
// Even though this is just an .obj file, we want it "fixed up"
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//
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ApplyFixupsToImage();
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//
|
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// Got the image, find the beginning of the array.
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//
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strucArray = FindStructureElementArray( ObjImage,
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objImageSize );
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CheckCondition( strucArray != NULL,
|
|
"%s does not contain a structure description array.\n",
|
|
ImagePath );
|
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return strucArray;
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}
|
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|
|
VOID
|
|
BuildHeaderFiles(
|
|
STRUC_ELEMENT UNALIGNED *StrucArray
|
|
)
|
|
{
|
|
STRUC_ELEMENT UNALIGNED *strucArray;
|
|
ULONG runningEnableMask;
|
|
ULONG enableMask;
|
|
ULONG sefType;
|
|
const char *formatString;
|
|
ULONG bitFieldStart;
|
|
PUINT64 bitFieldPtr;
|
|
UINT64 bitFieldData;
|
|
PCHAR name;
|
|
BOOLEAN finished;
|
|
|
|
//
|
|
// Process each element in the array. The first element is the
|
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// marker string element, so it is skipped.
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//
|
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runningEnableMask = 0;
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finished = FALSE;
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strucArray = StrucArray;
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do{
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strucArray++;
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sefType = (ULONG)(strucArray->Flags & SEF_TYPE_MASK);
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|
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if( sefType == SEF_BITFLD ){
|
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|
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//
|
|
// For bitfields, the enable mask is set explicitly
|
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//
|
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enableMask = (ULONG)(strucArray->Flags & SEF_ENABLE_MASK);
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|
|
} else {
|
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|
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//
|
|
// For everything else, we use the current runningEnableMask
|
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//
|
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|
|
enableMask = runningEnableMask;
|
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}
|
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|
|
switch( sefType ){
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|
|
case SEF_BITFLD:
|
|
|
|
//
|
|
// This kind of element is tricky. "Equate" is actually a
|
|
// pointer to a bitfield structure. This structure has had
|
|
// a portion of it (the bitfield) initialized to ones.
|
|
//
|
|
// It is the job of this case to poke around in that
|
|
// structure in order to determine where the bitfield landed.
|
|
//
|
|
|
|
bitFieldPtr = (PINT64)(strucArray->Equate);
|
|
bitFieldData = *bitFieldPtr;
|
|
|
|
//
|
|
// Determine the zero-based starting bitnumber of the field.
|
|
//
|
|
|
|
bitFieldStart = 0;
|
|
while( (bitFieldData & ((UINT64)1 << bitFieldStart)) == 0 ){
|
|
|
|
bitFieldStart++;
|
|
}
|
|
|
|
name = StripWhiteSpace( strucArray->Name );
|
|
|
|
if( *name != '\0'){
|
|
|
|
HeaderPrint( enableMask,
|
|
sefType,
|
|
name,
|
|
bitFieldData,
|
|
name,
|
|
bitFieldStart );
|
|
}
|
|
|
|
//
|
|
// A bitfield can be followed by any number of
|
|
// SEF_BITALIAS entries. These are alias names for the
|
|
// bitmask that was just defined.
|
|
//
|
|
|
|
while( TRUE ){
|
|
|
|
sefType = (ULONG)((strucArray+1)->Flags & SEF_TYPE_MASK);
|
|
if( sefType != SEF_BITALIAS ){
|
|
|
|
//
|
|
// No more aliases.
|
|
//
|
|
|
|
break;
|
|
}
|
|
|
|
//
|
|
// This is a bitmask alias field, process it.
|
|
//
|
|
|
|
strucArray++;
|
|
|
|
name = StripWhiteSpace( strucArray->Name );
|
|
|
|
HeaderPrint( enableMask,
|
|
sefType,
|
|
name,
|
|
bitFieldData );
|
|
|
|
}
|
|
break;
|
|
|
|
case SEF_END:
|
|
finished = TRUE;
|
|
break;
|
|
|
|
case SEF_EQUATE:
|
|
|
|
if( (LONG64)strucArray->Equate < 0 ){
|
|
|
|
//
|
|
// Negative constant
|
|
//
|
|
|
|
if( (LONG64)strucArray->Equate < LONG_MIN ){
|
|
|
|
//
|
|
// More negative than can be represented in 32 bits
|
|
//
|
|
|
|
sefType = SEF_EQUATE64;
|
|
|
|
} else {
|
|
|
|
//
|
|
// Falls within [LONG_MIN..0], Leave as SEF_EQUATE32
|
|
//
|
|
}
|
|
|
|
} else if( (ULONG64)strucArray->Equate > (ULONG_MAX) ){
|
|
|
|
//
|
|
// More positive than can be represented in 32 bits
|
|
//
|
|
|
|
sefType = SEF_EQUATE64;
|
|
}
|
|
|
|
//
|
|
// Fall through
|
|
//
|
|
|
|
case SEF_EQUATE64:
|
|
case SEF_COMMENT:
|
|
HeaderPrint( enableMask,
|
|
sefType,
|
|
strucArray->Name,
|
|
(UINT64)strucArray->Equate );
|
|
break;
|
|
|
|
case SEF_STRING:
|
|
HeaderPrint( enableMask,
|
|
sefType,
|
|
strucArray->Name,
|
|
strucArray->Equate );
|
|
break;
|
|
|
|
case SEF_STRUCTURE:
|
|
HeaderPrint( enableMask,
|
|
sefType,
|
|
strucArray->Name,
|
|
(ULONG)strucArray->Equate,
|
|
strucArray->Name );
|
|
break;
|
|
|
|
case SEF_SETMASK:
|
|
runningEnableMask |= strucArray->Equate;
|
|
break;
|
|
|
|
case SEF_CLRMASK:
|
|
runningEnableMask &= ~strucArray->Equate;
|
|
break;
|
|
|
|
case SEF_PATH:
|
|
|
|
//
|
|
// Add another output file to our list.
|
|
//
|
|
|
|
CheckCondition( fOutputSpecified == FALSE,
|
|
"setPath() in %s incompatible with -o flag\n",
|
|
ObjectPath );
|
|
|
|
AddNewOutputFile( strucArray->Name,
|
|
(ULONG)strucArray->Flags );
|
|
break;
|
|
|
|
default:
|
|
|
|
//
|
|
// Found an SEF_TYPE we don't know about. This is fatal.
|
|
//
|
|
|
|
CheckCondition( FALSE,
|
|
"Unknown structure type %d. "
|
|
"Need an updated genxx.exe?\n",
|
|
sefType );
|
|
break;
|
|
|
|
}
|
|
|
|
} while( finished == FALSE );
|
|
}
|
|
|
|
VOID
|
|
__cdecl
|
|
CheckCondition(
|
|
int Condition,
|
|
const char *FormatString,
|
|
...
|
|
)
|
|
{
|
|
va_list(arglist);
|
|
|
|
va_start(arglist, FormatString);
|
|
|
|
if( Condition == 0 ){
|
|
|
|
//
|
|
// A fatal error was encountered. Bail.
|
|
//
|
|
|
|
vprintf( FormatString, arglist );
|
|
perror( "genxx" );
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
VOID
|
|
_cdecl
|
|
HeaderPrint(
|
|
ULONG EnableFlags,
|
|
ULONG Type,
|
|
...
|
|
)
|
|
{
|
|
POUTPUT_FILE outputFile;
|
|
char const *formatString;
|
|
|
|
va_list arglist;
|
|
|
|
//
|
|
// Send the output to each output file as appropriate
|
|
//
|
|
|
|
outputFile = OutputFileList;
|
|
while( outputFile != NULL ){
|
|
|
|
va_start( arglist, Type );
|
|
|
|
if( outputFile->EnableMask == 0 ||
|
|
(outputFile->EnableMask & EnableFlags) != 0 ){
|
|
|
|
//
|
|
// Either this output file gets everything, or the mask
|
|
// matches. Figure out which format to use... '.h' or '.inc'
|
|
// style.
|
|
//
|
|
|
|
if( Type == SEF_STRING ){
|
|
|
|
//
|
|
// For SEF_STRING, strucArray->Name *is* the format string.
|
|
//
|
|
|
|
formatString = va_arg( arglist, PUCHAR );
|
|
|
|
} else if( outputFile->IncFormat != FALSE ){
|
|
|
|
//
|
|
// Use the ".inc" format
|
|
//
|
|
|
|
formatString = Asm386FormatStringArray[ Type ];
|
|
|
|
} else {
|
|
|
|
//
|
|
// Use the ".h" format
|
|
//
|
|
|
|
formatString = PreprocessedFormatStringArray[ Type ];
|
|
}
|
|
|
|
//
|
|
// Now send it
|
|
//
|
|
|
|
vfprintf( outputFile->File, formatString, arglist );
|
|
}
|
|
|
|
va_end( arglist );
|
|
|
|
//
|
|
// Process all current output files.
|
|
//
|
|
|
|
outputFile = outputFile->Next;
|
|
}
|
|
}
|
|
|
|
VOID
|
|
GetEnvironment( VOID )
|
|
{
|
|
char *ntDrive;
|
|
char *ntRoot;
|
|
|
|
//
|
|
// Set NtRoot = %_NTDRIVE%\%_NTROOT%
|
|
//
|
|
|
|
ntDrive = getenv( "_NTDRIVE" );
|
|
ntRoot = getenv( "_NTROOT" );
|
|
if( ntDrive != NULL && ntRoot != NULL ){
|
|
|
|
sprintf( NtRoot, "%s%s", ntDrive, ntRoot );
|
|
|
|
} else {
|
|
|
|
//
|
|
// If either _NTDRIVE or _NTROOT were not found in the environment,
|
|
// let's try with \nt.
|
|
//
|
|
|
|
strcpy( NtRoot, "\\nt" );
|
|
}
|
|
}
|
|
|
|
PSTRUC_ELEMENT
|
|
FindStructureElementArray(
|
|
PCHAR Buffer,
|
|
ULONG BufferSize
|
|
)
|
|
{
|
|
PCHAR searchPoint;
|
|
PCHAR searchEndPoint;
|
|
PSTRUC_ELEMENT strucElement;
|
|
|
|
//
|
|
// Search Buffer for the beginning of a structure element array.
|
|
// The first element in this array contains MARKER_STRING.
|
|
//
|
|
|
|
searchPoint = Buffer;
|
|
searchEndPoint = Buffer + BufferSize - sizeof( MarkerString );
|
|
|
|
do{
|
|
//
|
|
// We scan the buffer a character at a time until we find a character
|
|
// that matches the first character in MarkerString.
|
|
//
|
|
|
|
if( *searchPoint != MarkerString[ 0 ] ){
|
|
continue;
|
|
}
|
|
|
|
//
|
|
// When a matching char is found, the rest of the string is compared.
|
|
//
|
|
|
|
if( strcmp( searchPoint, MarkerString ) == 0 ){
|
|
|
|
//
|
|
// It matched too, we're done.
|
|
//
|
|
|
|
strucElement = CONTAINING_RECORD( searchPoint,
|
|
STRUC_ELEMENT,
|
|
Name );
|
|
return strucElement;
|
|
}
|
|
|
|
} while( searchPoint++ < searchEndPoint );
|
|
|
|
//
|
|
// Fell out of the loop, we couldn't find the string.
|
|
//
|
|
|
|
return NULL;
|
|
}
|
|
|
|
VOID
|
|
Usage( VOID ){
|
|
|
|
int platformIndex;
|
|
PPLATFORM platform;
|
|
|
|
|
|
printf("genxx: [");
|
|
platform = PlatformList;
|
|
while( platform->PlatformName != NULL ){
|
|
|
|
printf("-%s|", platform->PlatformName );
|
|
platform++;
|
|
}
|
|
|
|
printf("<objpath>] [-s<h|inc>] [-o<outputpath>]\n");
|
|
exit(1);
|
|
}
|
|
|
|
VOID
|
|
ApplyFixupsToImage( VOID )
|
|
{
|
|
//
|
|
// Applies fixups to the OBJ image loaded at ObjImage
|
|
//
|
|
|
|
PIMAGE_FILE_HEADER fileHeader;
|
|
PIMAGE_SECTION_HEADER sectionHeader;
|
|
PIMAGE_SECTION_HEADER sectionHeaderArray;
|
|
PIMAGE_SYMBOL symbolTable;
|
|
PIMAGE_SYMBOL symbol;
|
|
PIMAGE_RELOCATION reloc;
|
|
PIMAGE_RELOCATION relocArray;
|
|
ULONG sectionNum;
|
|
ULONG relocNum;
|
|
ULONG_PTR targetVa;
|
|
PULONG_PTR fixupVa;
|
|
|
|
fileHeader = (PIMAGE_FILE_HEADER)ObjImage;
|
|
|
|
//
|
|
// We need the symbol table to apply the fixups
|
|
//
|
|
|
|
symbolTable = (PIMAGE_SYMBOL)(ObjImage + fileHeader->PointerToSymbolTable);
|
|
|
|
//
|
|
// Get a pointer to the first element in the section header
|
|
//
|
|
|
|
sectionHeaderArray = (PIMAGE_SECTION_HEADER)(ObjImage +
|
|
sizeof( IMAGE_FILE_HEADER ) +
|
|
fileHeader->SizeOfOptionalHeader);
|
|
|
|
//
|
|
// Apply the fixups for each section
|
|
//
|
|
|
|
for( sectionNum = 0;
|
|
sectionNum < fileHeader->NumberOfSections;
|
|
sectionNum++ ){
|
|
|
|
sectionHeader = §ionHeaderArray[ sectionNum ];
|
|
|
|
if (memcmp(sectionHeader->Name, ".data", sizeof(".data")+1)) {
|
|
// Not .data - don't bother with the fixup
|
|
continue;
|
|
}
|
|
|
|
//
|
|
// Apply each fixup in this section
|
|
//
|
|
|
|
relocArray = (PIMAGE_RELOCATION)(ObjImage +
|
|
sectionHeader->PointerToRelocations);
|
|
for( relocNum = 0;
|
|
relocNum < sectionHeader->NumberOfRelocations;
|
|
relocNum++ ){
|
|
|
|
reloc = &relocArray[ relocNum ];
|
|
|
|
//
|
|
// The relocation gives us the position in the image of the
|
|
// relocation modification (VirtualAddress). To find out what
|
|
// to put there, we have to look the symbol up in the symbol index.
|
|
//
|
|
|
|
symbol = &symbolTable[ reloc->SymbolTableIndex ];
|
|
|
|
targetVa =
|
|
sectionHeaderArray[ symbol->SectionNumber-1 ].PointerToRawData;
|
|
|
|
targetVa += symbol->Value;
|
|
targetVa += (ULONG_PTR)ObjImage;
|
|
|
|
fixupVa = (PULONG_PTR)(ObjImage +
|
|
reloc->VirtualAddress +
|
|
sectionHeader->PointerToRawData );
|
|
|
|
*fixupVa = targetVa;
|
|
}
|
|
}
|
|
}
|
|
|
|
BOOLEAN
|
|
IsWhiteSpace(
|
|
CHAR Char
|
|
)
|
|
{
|
|
if( Char == '\t' ||
|
|
Char == ' ' ||
|
|
Char == '\r' ||
|
|
Char == '\n' ){
|
|
|
|
return TRUE;
|
|
} else {
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
PCHAR
|
|
StripWhiteSpace(
|
|
PCHAR String
|
|
)
|
|
{
|
|
PCHAR chr;
|
|
ULONG strLen;
|
|
|
|
strLen = strlen( String );
|
|
if( strLen == 0 ){
|
|
return String;
|
|
}
|
|
|
|
//
|
|
// Strip off trailing whitespace
|
|
//
|
|
|
|
chr = String + strLen - 1;
|
|
while( IsWhiteSpace( *chr )){
|
|
*chr = '\0';
|
|
chr--;
|
|
}
|
|
|
|
//
|
|
// Advance past leading whitespace
|
|
//
|
|
|
|
chr = String;
|
|
while( IsWhiteSpace( *chr )){
|
|
chr++;
|
|
}
|
|
|
|
return chr;
|
|
}
|
|
|