[bpt/emacs.git] / nt / addsection.c

/* Add an uninitialized data section to an executable.
   Copyright (C) 1999, 2001-2013 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.


   Andrew Innes <andrewi@harlequin.co.uk>       04-Jan-1999
     based on code from unexw32.c
*/

#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <time.h>
#if defined(__GNUC__) && !defined(_W64)
#define _ANONYMOUS_UNION
#define _ANONYMOUS_STRUCT
#endif
#include <windows.h>

/* Include relevant definitions from IMAGEHLP.H, which can be found
   in \\win32sdk\mstools\samples\image\include\imagehlp.h. */

PIMAGE_NT_HEADERS
(__stdcall * pfnCheckSumMappedFile) (PVOID BaseAddress,
				     DWORD_PTR FileLength,
				     PDWORD_PTR HeaderSum,
				     PDWORD_PTR CheckSum);

#undef min
#undef max
#define min(x, y) (((x) < (y)) ? (x) : (y))
#define max(x, y) (((x) > (y)) ? (x) : (y))


/* File handling.  */

typedef struct file_data {
  const char    *name;
  unsigned long  size;
  HANDLE         file;
  HANDLE         file_mapping;
  unsigned char *file_base;
} file_data;

int
open_input_file (file_data *p_file, const char *filename)
{
  HANDLE file;
  HANDLE file_mapping;
  void  *file_base;
  unsigned long size, upper_size;

  file = CreateFile (filename, GENERIC_READ, FILE_SHARE_READ, NULL,
		     OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
  if (file == INVALID_HANDLE_VALUE)
    return FALSE;

  size = GetFileSize (file, &upper_size);
  file_mapping = CreateFileMapping (file, NULL, PAGE_READONLY,
				    0, size, NULL);
  if (!file_mapping)
    return FALSE;

  file_base = MapViewOfFile (file_mapping, FILE_MAP_READ, 0, 0, size);
  if (file_base == 0)
    return FALSE;

  p_file->name = filename;
  p_file->size = size;
  p_file->file = file;
  p_file->file_mapping = file_mapping;
  p_file->file_base = file_base;

  return TRUE;
}

int
open_output_file (file_data *p_file, const char *filename, unsigned long size)
{
  HANDLE file;
  HANDLE file_mapping;
  void  *file_base;

  file = CreateFile (filename, GENERIC_READ | GENERIC_WRITE, 0, NULL,
		     CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
  if (file == INVALID_HANDLE_VALUE)
    return FALSE;

  file_mapping = CreateFileMapping (file, NULL, PAGE_READWRITE,
				    0, size, NULL);
  if (!file_mapping)
    return FALSE;

  file_base = MapViewOfFile (file_mapping, FILE_MAP_WRITE, 0, 0, size);
  if (file_base == 0)
    return FALSE;

  p_file->name = filename;
  p_file->size = size;
  p_file->file = file;
  p_file->file_mapping = file_mapping;
  p_file->file_base = file_base;

  return TRUE;
}

/* Close the system structures associated with the given file.  */
void
close_file_data (file_data *p_file)
{
  UnmapViewOfFile (p_file->file_base);
  CloseHandle (p_file->file_mapping);
  /* For the case of output files, set final size.  */
  SetFilePointer (p_file->file, p_file->size, NULL, FILE_BEGIN);
  SetEndOfFile (p_file->file);
  CloseHandle (p_file->file);
}


/* Routines to manipulate NT executable file sections.  */

unsigned long
get_unrounded_section_size (PIMAGE_SECTION_HEADER p_section)
{
  /* The true section size, before rounding, for an initialized data or
     code section.  (Supposedly some linkers swap the meaning of these
     two values.)  */
  return min (p_section->SizeOfRawData,
	      p_section->Misc.VirtualSize);
}

/* Return pointer to section header for named section. */
IMAGE_SECTION_HEADER *
find_section (const char *name, IMAGE_NT_HEADERS *nt_header)
{
  PIMAGE_SECTION_HEADER section;
  int i;

  section = IMAGE_FIRST_SECTION (nt_header);

  for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++)
    {
      if (strcmp (section->Name, name) == 0)
	return section;
      section++;
    }
  return NULL;
}

/* Return pointer to section header for section containing the given
   relative virtual address. */
IMAGE_SECTION_HEADER *
rva_to_section (DWORD_PTR rva, IMAGE_NT_HEADERS * nt_header)
{
  PIMAGE_SECTION_HEADER section;
  int i;

  section = IMAGE_FIRST_SECTION (nt_header);

  for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++)
    {
      /* Some linkers (eg. the NT SDK linker I believe) swapped the
	 meaning of these two values - or rather, they ignored
	 VirtualSize entirely and always set it to zero.  This affects
	 some very old exes (eg. gzip dated Dec 1993).  Since
	 w32_executable_type relies on this function to work reliably,
	 we need to cope with this.  */
      DWORD_PTR real_size = max (section->SizeOfRawData,
			     section->Misc.VirtualSize);
      if (rva >= section->VirtualAddress
	  && rva < section->VirtualAddress + real_size)
	return section;
      section++;
    }
  return NULL;
}

/* Return pointer to section header for section containing the given
   offset in its raw data area. */
IMAGE_SECTION_HEADER *
offset_to_section (DWORD_PTR offset, IMAGE_NT_HEADERS * nt_header)
{
  PIMAGE_SECTION_HEADER section;
  int i;

  section = IMAGE_FIRST_SECTION (nt_header);

  for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++)
    {
      if (offset >= section->PointerToRawData
	  && offset < section->PointerToRawData + section->SizeOfRawData)
	return section;
      section++;
    }
  return NULL;
}

/* Return offset to an object in dst, given offset in src.  We assume
   there is at least one section in both src and dst images, and that
   the some sections may have been added to dst (after sections in src).  */
static DWORD_PTR
relocate_offset (DWORD_PTR offset,
		 IMAGE_NT_HEADERS * src_nt_header,
		 IMAGE_NT_HEADERS * dst_nt_header)
{
  PIMAGE_SECTION_HEADER src_section = IMAGE_FIRST_SECTION (src_nt_header);
  PIMAGE_SECTION_HEADER dst_section = IMAGE_FIRST_SECTION (dst_nt_header);
  int i = 0;

  while (offset >= src_section->PointerToRawData)
    {
      if (offset < src_section->PointerToRawData + src_section->SizeOfRawData)
	break;
      i++;
      if (i == src_nt_header->FileHeader.NumberOfSections)
	{
	  /* Handle offsets after the last section.  */
	  dst_section = IMAGE_FIRST_SECTION (dst_nt_header);
	  dst_section += dst_nt_header->FileHeader.NumberOfSections - 1;
	  while (dst_section->PointerToRawData == 0)
	    dst_section--;
	  while (src_section->PointerToRawData == 0)
	    src_section--;
	  return offset
	    + (dst_section->PointerToRawData + dst_section->SizeOfRawData)
	    - (src_section->PointerToRawData + src_section->SizeOfRawData);
	}
      src_section++;
      dst_section++;
    }
  return offset +
    (dst_section->PointerToRawData - src_section->PointerToRawData);
}

#define OFFSET_TO_RVA(offset, section) \
	  (section->VirtualAddress + ((DWORD_PTR)(offset) - section->PointerToRawData))

#define RVA_TO_OFFSET(rva, section) \
	  (section->PointerToRawData + ((DWORD_PTR)(rva) - section->VirtualAddress))

#define RVA_TO_SECTION_OFFSET(rva, section) \
	  ((DWORD_PTR)(rva) - section->VirtualAddress)

/* Convert address in executing image to RVA.  */
#define PTR_TO_RVA(ptr) ((DWORD_PTR)(ptr) - (DWORD_PTR) GetModuleHandle (NULL))

#define PTR_TO_OFFSET(ptr, pfile_data) \
          ((unsigned const char *)(ptr) - (pfile_data)->file_base)

#define OFFSET_TO_PTR(offset, pfile_data) \
          ((pfile_data)->file_base + (DWORD_PTR)(offset))

#define ROUND_UP(p, align) \
	  (((DWORD_PTR)(p) + (align)-1) & ~((DWORD_PTR)(align)-1))
#define ROUND_DOWN(p, align) ((DWORD_PTR)(p) & ~((DWORD_PTR)(align)-1))


static void
copy_executable_and_add_section (file_data *p_infile,
				 file_data *p_outfile,
				 const char *new_section_name,
				 DWORD_PTR new_section_size)
{
  unsigned char *dst;
  PIMAGE_DOS_HEADER dos_header;
  PIMAGE_NT_HEADERS nt_header;
  PIMAGE_NT_HEADERS dst_nt_header;
  PIMAGE_SECTION_HEADER section;
  PIMAGE_SECTION_HEADER dst_section;
  DWORD_PTR offset;
  int i;
  int be_verbose = GetEnvironmentVariable ("DEBUG_DUMP", NULL, 0) > 0;

#define COPY_CHUNK(message, src, size, verbose)					\
  do {										\
    unsigned const char *s = (void *)(src);						\
    unsigned long count = (size);						\
    if (verbose)								\
      {										\
	printf ("%s\n", (message));						\
	printf ("\t0x%08x Offset in input file.\n", s - p_infile->file_base); 	\
	printf ("\t0x%08x Offset in output file.\n", dst - p_outfile->file_base); \
	printf ("\t0x%08x Size in bytes.\n", count);				\
      }										\
    memcpy (dst, s, count);							\
    dst += count;								\
  } while (0)

#define DST_TO_OFFSET()  PTR_TO_OFFSET (dst, p_outfile)
#define ROUND_UP_DST_AND_ZERO(align)						\
  do {										\
    unsigned char *newdst = p_outfile->file_base				\
      + ROUND_UP (DST_TO_OFFSET (), (align));					\
    /* Zero the alignment slop; it may actually initialize real data.  */	\
    memset (dst, 0, newdst - dst);						\
    dst = newdst;								\
  } while (0)

  /* Copy the source image sequentially, ie. section by section after
     copying the headers and section table, to simplify the process of
     adding an extra section table entry (which might force the raw
     section data to be relocated).

     Note that dst is updated implicitly by each COPY_CHUNK.  */

  dos_header = (PIMAGE_DOS_HEADER) p_infile->file_base;
  nt_header = (PIMAGE_NT_HEADERS) (((unsigned char *) dos_header) +
				   dos_header->e_lfanew);
  section = IMAGE_FIRST_SECTION (nt_header);

  dst = (unsigned char *) p_outfile->file_base;

  COPY_CHUNK ("Copying DOS header...", dos_header,
	      (DWORD_PTR) nt_header - (DWORD_PTR) dos_header, be_verbose);
  dst_nt_header = (PIMAGE_NT_HEADERS) dst;
  COPY_CHUNK ("Copying NT header...", nt_header,
	      (DWORD_PTR) section - (DWORD_PTR) nt_header, be_verbose);
  dst_section = (PIMAGE_SECTION_HEADER) dst;
  COPY_CHUNK ("Copying section table...", section,
	      nt_header->FileHeader.NumberOfSections * sizeof (*section),
	      be_verbose);

  /* To improve the efficiency of demand loading, make the file
     alignment match the section alignment (VC++ 6.0 does this by
     default anyway).  */
  dst_nt_header->OptionalHeader.FileAlignment =
    dst_nt_header->OptionalHeader.SectionAlignment;

  /* Add an uninitialized data section at the end, of the specified name
     and virtual size.  */
  if (find_section (new_section_name, nt_header) == NULL)
    /* Leave room for extra section table entry; filled in below.  */
    dst += sizeof (*section);
  else
    new_section_name = NULL;

  /* Align the first section's raw data area, and set the header size
     field accordingly.  */
  ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment);
  dst_nt_header->OptionalHeader.SizeOfHeaders = DST_TO_OFFSET ();

  for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++)
    {
      char msg[100];
      /* Windows section names are fixed 8-char strings, only
	 zero-terminated if the name is shorter than 8 characters.  */
      sprintf (msg, "Copying raw data for %.8s...", section->Name);

      /* Update the file-relative offset for this section's raw data (if
         it has any) in case things have been relocated; we will update
         the other offsets below once we know where everything is.  */
      if (dst_section->PointerToRawData)
	dst_section->PointerToRawData = DST_TO_OFFSET ();

      /* Can always copy the original raw data.  */
      COPY_CHUNK
	(msg, OFFSET_TO_PTR (section->PointerToRawData, p_infile),
	 section->SizeOfRawData, be_verbose);

      /* Round up the raw data size to the new alignment.  */
      dst_section->SizeOfRawData =
	ROUND_UP (dst_section->SizeOfRawData,
		  dst_nt_header->OptionalHeader.FileAlignment);

      /* Align the next section's raw data area.  */
      ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment);

      section++;
      dst_section++;
    }

  /* Add the extra section entry (which adds no raw data).  */
  if (new_section_name != NULL)
    {
      dst_nt_header->FileHeader.NumberOfSections++;
      dst_nt_header->OptionalHeader.SizeOfImage += new_section_size;
      strncpy (dst_section->Name, new_section_name, sizeof (dst_section->Name));
      dst_section->VirtualAddress =
	section[-1].VirtualAddress
	+ ROUND_UP (section[-1].Misc.VirtualSize,
		    dst_nt_header->OptionalHeader.SectionAlignment);
      dst_section->Misc.VirtualSize = new_section_size;
      dst_section->PointerToRawData = 0;
      dst_section->SizeOfRawData = 0;
      dst_section->Characteristics =
	IMAGE_SCN_CNT_UNINITIALIZED_DATA
	| IMAGE_SCN_MEM_READ
	| IMAGE_SCN_MEM_WRITE;
    }

  /* Copy remainder of source image.  */
  section--;
  offset = ROUND_UP (section->PointerToRawData + section->SizeOfRawData,
		     nt_header->OptionalHeader.FileAlignment);
  COPY_CHUNK
    ("Copying remainder of executable...",
     OFFSET_TO_PTR (offset, p_infile),
     p_infile->size - offset, be_verbose);

  /* Final size for new image.  */
  p_outfile->size = DST_TO_OFFSET ();

  /* Now patch up remaining file-relative offsets.  */
  section = IMAGE_FIRST_SECTION (nt_header);
  dst_section = IMAGE_FIRST_SECTION (dst_nt_header);

#define ADJUST_OFFSET(var)						\
  do {									\
    if ((var) != 0)							\
      (var) = relocate_offset ((var), nt_header, dst_nt_header);	\
  } while (0)

  dst_nt_header->OptionalHeader.SizeOfInitializedData = 0;
  dst_nt_header->OptionalHeader.SizeOfUninitializedData = 0;
  for (i = 0; i < dst_nt_header->FileHeader.NumberOfSections; i++)
    {
      /* Recompute data sizes for completeness.  */
      if (dst_section[i].Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA)
	dst_nt_header->OptionalHeader.SizeOfInitializedData +=
	  ROUND_UP (dst_section[i].Misc.VirtualSize, dst_nt_header->OptionalHeader.FileAlignment);
      else if (dst_section[i].Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA)
	dst_nt_header->OptionalHeader.SizeOfUninitializedData +=
	  ROUND_UP (dst_section[i].Misc.VirtualSize, dst_nt_header->OptionalHeader.FileAlignment);

      ADJUST_OFFSET (dst_section[i].PointerToLinenumbers);
    }

  ADJUST_OFFSET (dst_nt_header->FileHeader.PointerToSymbolTable);

  /* Update offsets in debug directory entries. */
  {
    IMAGE_DATA_DIRECTORY debug_dir =
      dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG];
    PIMAGE_DEBUG_DIRECTORY debug_entry;

    section = rva_to_section (debug_dir.VirtualAddress, dst_nt_header);
    if (section)
      {
	debug_entry = (PIMAGE_DEBUG_DIRECTORY)
	  (RVA_TO_OFFSET (debug_dir.VirtualAddress, section) + p_outfile->file_base);
	debug_dir.Size /= sizeof (IMAGE_DEBUG_DIRECTORY);

	for (i = 0; i < debug_dir.Size; i++, debug_entry++)
	  ADJUST_OFFSET (debug_entry->PointerToRawData);
      }
  }
}


int
main (int argc, char **argv)
{
  file_data in_file, out_file;
  char out_filename[MAX_PATH], in_filename[MAX_PATH];
  unsigned long size;
  PIMAGE_DOS_HEADER dos_header;
  PIMAGE_NT_HEADERS nt_header;

#define OLD_NAME        argv[1]
#define NEW_NAME        argv[2]
#define SECTION_NAME    argv[3]
#define SECTION_SIZE    argv[4]

  strcpy (in_filename, OLD_NAME);
  strcpy (out_filename, NEW_NAME);

  printf ("Dumping from %s\n", in_filename);
  printf ("          to %s\n", out_filename);

  /* Open the undumped executable file.  */
  if (!open_input_file (&in_file, in_filename))
    {
      printf ("Failed to open %s (%d)...bailing.\n",
	      in_filename, GetLastError ());
      exit (1);
    }
  dos_header = (PIMAGE_DOS_HEADER) in_file.file_base;
  nt_header = (PIMAGE_NT_HEADERS) ((char *) dos_header + dos_header->e_lfanew);
  /* Allow for expansion due to increasing file align to section align.
     We can overestimate here, since close_file_data will update the
     size exactly.  */
  size = in_file.size
    + nt_header->OptionalHeader.SectionAlignment
    * nt_header->FileHeader.NumberOfSections;
  if (!open_output_file (&out_file, out_filename, size))
    {
      printf ("Failed to open %s (%d)...bailing.\n",
	      out_filename, GetLastError ());
      exit (1);
    }

  copy_executable_and_add_section (&in_file, &out_file,
				   SECTION_NAME,
				   atoi (SECTION_SIZE) * 1024 * 1024);

  /* Patch up header fields; profiler is picky about this. */
  {
    HANDLE hImagehelp = LoadLibrary ("imagehlp.dll");
    DWORD_PTR  headersum;
    DWORD_PTR  checksum;

    dos_header = (PIMAGE_DOS_HEADER) out_file.file_base;
    nt_header = (PIMAGE_NT_HEADERS) ((char *) dos_header + dos_header->e_lfanew);

    nt_header->OptionalHeader.CheckSum = 0;
//    nt_header->FileHeader.TimeDateStamp = time (NULL);
//    dos_header->e_cp = size / 512;
//    nt_header->OptionalHeader.SizeOfImage = size;

    pfnCheckSumMappedFile = (void *) GetProcAddress (hImagehelp, "CheckSumMappedFile");
    if (pfnCheckSumMappedFile)
      {
//	nt_header->FileHeader.TimeDateStamp = time (NULL);
	pfnCheckSumMappedFile (out_file.file_base,
			       out_file.size,
			       &headersum,
			       &checksum);
	nt_header->OptionalHeader.CheckSum = checksum;
      }
    FreeLibrary (hImagehelp);
  }

  close_file_data (&in_file);
  close_file_data (&out_file);

  return 0;
}

/* eof */
Commit	Line	Data
6012853d	1	/* Add an uninitialized data section to an executable.
ab422c4d	2	Copyright (C) 1999, 2001-2013 Free Software Foundation, Inc.
6012853d AI	3
	4	This file is part of GNU Emacs.
	5
eef0be9e	6	GNU Emacs is free software: you can redistribute it and/or modify
6012853d	7	it under the terms of the GNU General Public License as published by
eef0be9e GM	8	the Free Software Foundation, either version 3 of the License, or
eef0be9e GM	9	(at your option) any later version.
6012853d AI	10
	11	GNU Emacs is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
eef0be9e GM	17	along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
eef0be9e GM	18
6012853d AI	19
	20	Andrew Innes <andrewi@harlequin.co.uk> 04-Jan-1999
	21	based on code from unexw32.c
	22	*/
	23
	24	#include <stdlib.h>
	25	#include <stdio.h>
	26	#include <fcntl.h>
	27	#include <time.h>
9536ec02	28	#if defined(__GNUC__) && !defined(_W64)
a1375c9f AI	29	#define _ANONYMOUS_UNION
	30	#define _ANONYMOUS_STRUCT
	31	#endif
6012853d AI	32	#include <windows.h>
	33
	34	/* Include relevant definitions from IMAGEHLP.H, which can be found
	35	in \\win32sdk\mstools\samples\image\include\imagehlp.h. */
	36
	37	PIMAGE_NT_HEADERS
62aba0d4 FP	38	(__stdcall * pfnCheckSumMappedFile) (PVOID BaseAddress,
	39	DWORD_PTR FileLength,
	40	PDWORD_PTR HeaderSum,
	41	PDWORD_PTR CheckSum);
6012853d AI	42
	43	#undef min
	44	#undef max
	45	#define min(x, y) (((x) < (y)) ? (x) : (y))
	46	#define max(x, y) (((x) > (y)) ? (x) : (y))
	47
	48
	49	/* File handling. */
	50
	51	typedef struct file_data {
0597ab06 JB	52	const char *name;
	53	unsigned long size;
	54	HANDLE file;
	55	HANDLE file_mapping;
	56	unsigned char *file_base;
6012853d AI	57	} file_data;
	58
	59	int
0597ab06	60	open_input_file (file_data p_file, const char filename)
6012853d AI	61	{
	62	HANDLE file;
	63	HANDLE file_mapping;
	64	void *file_base;
	65	unsigned long size, upper_size;
	66
	67	file = CreateFile (filename, GENERIC_READ, FILE_SHARE_READ, NULL,
	68	OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
177c0ea7	69	if (file == INVALID_HANDLE_VALUE)
6012853d AI	70	return FALSE;
	71
	72	size = GetFileSize (file, &upper_size);
177c0ea7	73	file_mapping = CreateFileMapping (file, NULL, PAGE_READONLY,
6012853d	74	0, size, NULL);
177c0ea7	75	if (!file_mapping)
6012853d AI	76	return FALSE;
	77
	78	file_base = MapViewOfFile (file_mapping, FILE_MAP_READ, 0, 0, size);
177c0ea7	79	if (file_base == 0)
6012853d AI	80	return FALSE;
	81
	82	p_file->name = filename;
	83	p_file->size = size;
	84	p_file->file = file;
	85	p_file->file_mapping = file_mapping;
	86	p_file->file_base = file_base;
	87
	88	return TRUE;
	89	}
	90
	91	int
0597ab06	92	open_output_file (file_data p_file, const char filename, unsigned long size)
6012853d AI	93	{
	94	HANDLE file;
	95	HANDLE file_mapping;
	96	void *file_base;
	97
	98	file = CreateFile (filename, GENERIC_READ \| GENERIC_WRITE, 0, NULL,
	99	CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
177c0ea7	100	if (file == INVALID_HANDLE_VALUE)
6012853d AI	101	return FALSE;
6012853d AI	102
177c0ea7	103	file_mapping = CreateFileMapping (file, NULL, PAGE_READWRITE,
6012853d	104	0, size, NULL);
177c0ea7	105	if (!file_mapping)
6012853d	106	return FALSE;
177c0ea7	107
6012853d	108	file_base = MapViewOfFile (file_mapping, FILE_MAP_WRITE, 0, 0, size);
177c0ea7	109	if (file_base == 0)
6012853d	110	return FALSE;
177c0ea7	111
6012853d AI	112	p_file->name = filename;
	113	p_file->size = size;
	114	p_file->file = file;
	115	p_file->file_mapping = file_mapping;
	116	p_file->file_base = file_base;
	117
	118	return TRUE;
	119	}
	120
	121	/* Close the system structures associated with the given file. */
	122	void
	123	close_file_data (file_data *p_file)
	124	{
	125	UnmapViewOfFile (p_file->file_base);
	126	CloseHandle (p_file->file_mapping);
	127	/* For the case of output files, set final size. */
	128	SetFilePointer (p_file->file, p_file->size, NULL, FILE_BEGIN);
	129	SetEndOfFile (p_file->file);
	130	CloseHandle (p_file->file);
	131	}
	132
	133
	134	/* Routines to manipulate NT executable file sections. */
	135
	136	unsigned long
	137	get_unrounded_section_size (PIMAGE_SECTION_HEADER p_section)
	138	{
	139	/* The true section size, before rounding, for an initialized data or
	140	code section. (Supposedly some linkers swap the meaning of these
	141	two values.) */
	142	return min (p_section->SizeOfRawData,
	143	p_section->Misc.VirtualSize);
	144	}
	145
	146	/* Return pointer to section header for named section. */
	147	IMAGE_SECTION_HEADER *
0597ab06	148	find_section (const char name, IMAGE_NT_HEADERS nt_header)
6012853d AI	149	{
	150	PIMAGE_SECTION_HEADER section;
	151	int i;
	152
	153	section = IMAGE_FIRST_SECTION (nt_header);
	154
	155	for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++)
	156	{
	157	if (strcmp (section->Name, name) == 0)
	158	return section;
	159	section++;
	160	}
	161	return NULL;
	162	}
	163
	164	/* Return pointer to section header for section containing the given
	165	relative virtual address. */
	166	IMAGE_SECTION_HEADER *
62aba0d4	167	rva_to_section (DWORD_PTR rva, IMAGE_NT_HEADERS * nt_header)
6012853d AI	168	{
	169	PIMAGE_SECTION_HEADER section;
	170	int i;
	171
	172	section = IMAGE_FIRST_SECTION (nt_header);
	173
	174	for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++)
	175	{
	176	/* Some linkers (eg. the NT SDK linker I believe) swapped the
	177	meaning of these two values - or rather, they ignored
	178	VirtualSize entirely and always set it to zero. This affects
	179	some very old exes (eg. gzip dated Dec 1993). Since
	180	w32_executable_type relies on this function to work reliably,
	181	we need to cope with this. */
62aba0d4	182	DWORD_PTR real_size = max (section->SizeOfRawData,
6012853d AI	183	section->Misc.VirtualSize);
	184	if (rva >= section->VirtualAddress
	185	&& rva < section->VirtualAddress + real_size)
	186	return section;
	187	section++;
	188	}
	189	return NULL;
	190	}
	191
	192	/* Return pointer to section header for section containing the given
	193	offset in its raw data area. */
	194	IMAGE_SECTION_HEADER *
62aba0d4	195	offset_to_section (DWORD_PTR offset, IMAGE_NT_HEADERS * nt_header)
6012853d AI	196	{
	197	PIMAGE_SECTION_HEADER section;
	198	int i;
	199
	200	section = IMAGE_FIRST_SECTION (nt_header);
	201
	202	for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++)
	203	{
	204	if (offset >= section->PointerToRawData
	205	&& offset < section->PointerToRawData + section->SizeOfRawData)
	206	return section;
	207	section++;
	208	}
	209	return NULL;
	210	}
	211
	212	/* Return offset to an object in dst, given offset in src. We assume
	213	there is at least one section in both src and dst images, and that
	214	the some sections may have been added to dst (after sections in src). */
62aba0d4 FP	215	static DWORD_PTR
62aba0d4 FP	216	relocate_offset (DWORD_PTR offset,
6012853d AI	217	IMAGE_NT_HEADERS * src_nt_header,
	218	IMAGE_NT_HEADERS * dst_nt_header)
	219	{
	220	PIMAGE_SECTION_HEADER src_section = IMAGE_FIRST_SECTION (src_nt_header);
	221	PIMAGE_SECTION_HEADER dst_section = IMAGE_FIRST_SECTION (dst_nt_header);
	222	int i = 0;
	223
	224	while (offset >= src_section->PointerToRawData)
	225	{
	226	if (offset < src_section->PointerToRawData + src_section->SizeOfRawData)
	227	break;
	228	i++;
	229	if (i == src_nt_header->FileHeader.NumberOfSections)
	230	{
	231	/* Handle offsets after the last section. */
	232	dst_section = IMAGE_FIRST_SECTION (dst_nt_header);
	233	dst_section += dst_nt_header->FileHeader.NumberOfSections - 1;
	234	while (dst_section->PointerToRawData == 0)
	235	dst_section--;
	236	while (src_section->PointerToRawData == 0)
	237	src_section--;
	238	return offset
	239	+ (dst_section->PointerToRawData + dst_section->SizeOfRawData)
	240	- (src_section->PointerToRawData + src_section->SizeOfRawData);
	241	}
	242	src_section++;
	243	dst_section++;
	244	}
	245	return offset +
	246	(dst_section->PointerToRawData - src_section->PointerToRawData);
	247	}
	248
	249	#define OFFSET_TO_RVA(offset, section) \
62aba0d4	250	(section->VirtualAddress + ((DWORD_PTR)(offset) - section->PointerToRawData))
6012853d AI	251
6012853d AI	252	#define RVA_TO_OFFSET(rva, section) \
62aba0d4	253	(section->PointerToRawData + ((DWORD_PTR)(rva) - section->VirtualAddress))
6012853d AI	254
6012853d AI	255	#define RVA_TO_SECTION_OFFSET(rva, section) \
62aba0d4	256	((DWORD_PTR)(rva) - section->VirtualAddress)
6012853d AI	257
6012853d AI	258	/* Convert address in executing image to RVA. */
62aba0d4	259	#define PTR_TO_RVA(ptr) ((DWORD_PTR)(ptr) - (DWORD_PTR) GetModuleHandle (NULL))
6012853d AI	260
6012853d AI	261	#define PTR_TO_OFFSET(ptr, pfile_data) \
0597ab06	262	((unsigned const char *)(ptr) - (pfile_data)->file_base)
6012853d AI	263
6012853d AI	264	#define OFFSET_TO_PTR(offset, pfile_data) \
62aba0d4	265	((pfile_data)->file_base + (DWORD_PTR)(offset))
6012853d	266
62aba0d4 FP	267	#define ROUND_UP(p, align) \
	268	(((DWORD_PTR)(p) + (align)-1) & ~((DWORD_PTR)(align)-1))
	269	#define ROUND_DOWN(p, align) ((DWORD_PTR)(p) & ~((DWORD_PTR)(align)-1))
6012853d AI	270
	271
	272	static void
177c0ea7	273	copy_executable_and_add_section (file_data *p_infile,
6012853d	274	file_data *p_outfile,
0597ab06	275	const char *new_section_name,
62aba0d4	276	DWORD_PTR new_section_size)
6012853d AI	277	{
	278	unsigned char *dst;
	279	PIMAGE_DOS_HEADER dos_header;
	280	PIMAGE_NT_HEADERS nt_header;
	281	PIMAGE_NT_HEADERS dst_nt_header;
	282	PIMAGE_SECTION_HEADER section;
	283	PIMAGE_SECTION_HEADER dst_section;
62aba0d4	284	DWORD_PTR offset;
6012853d	285	int i;
d2fcf769	286	int be_verbose = GetEnvironmentVariable ("DEBUG_DUMP", NULL, 0) > 0;
6012853d	287
d2fcf769	288	#define COPY_CHUNK(message, src, size, verbose) \
6012853d	289	do { \
0597ab06	290	unsigned const char s = (void )(src); \
6012853d	291	unsigned long count = (size); \
d2fcf769 EZ	292	if (verbose) \
	293	{ \
	294	printf ("%s\n", (message)); \
	295	printf ("\t0x%08x Offset in input file.\n", s - p_infile->file_base); \
	296	printf ("\t0x%08x Offset in output file.\n", dst - p_outfile->file_base); \
	297	printf ("\t0x%08x Size in bytes.\n", count); \
	298	} \
6012853d AI	299	memcpy (dst, s, count); \
	300	dst += count; \
	301	} while (0)
	302
	303	#define DST_TO_OFFSET() PTR_TO_OFFSET (dst, p_outfile)
7466aec4 AI	304	#define ROUND_UP_DST_AND_ZERO(align) \
	305	do { \
	306	unsigned char *newdst = p_outfile->file_base \
	307	+ ROUND_UP (DST_TO_OFFSET (), (align)); \
	308	/* Zero the alignment slop; it may actually initialize real data. */ \
	309	memset (dst, 0, newdst - dst); \
	310	dst = newdst; \
	311	} while (0)
6012853d AI	312
	313	/* Copy the source image sequentially, ie. section by section after
	314	copying the headers and section table, to simplify the process of
	315	adding an extra section table entry (which might force the raw
	316	section data to be relocated).
	317
	318	Note that dst is updated implicitly by each COPY_CHUNK. */
	319
	320	dos_header = (PIMAGE_DOS_HEADER) p_infile->file_base;
62aba0d4	321	nt_header = (PIMAGE_NT_HEADERS) (((unsigned char *) dos_header) +
6012853d AI	322	dos_header->e_lfanew);
6012853d AI	323	section = IMAGE_FIRST_SECTION (nt_header);
177c0ea7	324
6012853d AI	325	dst = (unsigned char *) p_outfile->file_base;
	326
	327	COPY_CHUNK ("Copying DOS header...", dos_header,
62aba0d4	328	(DWORD_PTR) nt_header - (DWORD_PTR) dos_header, be_verbose);
6012853d AI	329	dst_nt_header = (PIMAGE_NT_HEADERS) dst;
6012853d AI	330	COPY_CHUNK ("Copying NT header...", nt_header,
62aba0d4	331	(DWORD_PTR) section - (DWORD_PTR) nt_header, be_verbose);
6012853d AI	332	dst_section = (PIMAGE_SECTION_HEADER) dst;
6012853d AI	333	COPY_CHUNK ("Copying section table...", section,
d2fcf769 EZ	334	nt_header->FileHeader.NumberOfSections * sizeof (*section),
d2fcf769 EZ	335	be_verbose);
6012853d AI	336
	337	/* To improve the efficiency of demand loading, make the file
	338	alignment match the section alignment (VC++ 6.0 does this by
	339	default anyway). */
	340	dst_nt_header->OptionalHeader.FileAlignment =
	341	dst_nt_header->OptionalHeader.SectionAlignment;
	342
	343	/* Add an uninitialized data section at the end, of the specified name
	344	and virtual size. */
	345	if (find_section (new_section_name, nt_header) == NULL)
	346	/* Leave room for extra section table entry; filled in below. */
	347	dst += sizeof (*section);
	348	else
	349	new_section_name = NULL;
	350
7466aec4 AI	351	/* Align the first section's raw data area, and set the header size
	352	field accordingly. */
	353	ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment);
	354	dst_nt_header->OptionalHeader.SizeOfHeaders = DST_TO_OFFSET ();
	355
6012853d AI	356	for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++)
	357	{
	358	char msg[100];
d2fcf769 EZ	359	/* Windows section names are fixed 8-char strings, only
	360	zero-terminated if the name is shorter than 8 characters. */
	361	sprintf (msg, "Copying raw data for %.8s...", section->Name);
6012853d	362
6012853d AI	363	/* Update the file-relative offset for this section's raw data (if
	364	it has any) in case things have been relocated; we will update
	365	the other offsets below once we know where everything is. */
	366	if (dst_section->PointerToRawData)
	367	dst_section->PointerToRawData = DST_TO_OFFSET ();
	368
	369	/* Can always copy the original raw data. */
	370	COPY_CHUNK
	371	(msg, OFFSET_TO_PTR (section->PointerToRawData, p_infile),
d2fcf769	372	section->SizeOfRawData, be_verbose);
6012853d AI	373
	374	/* Round up the raw data size to the new alignment. */
	375	dst_section->SizeOfRawData =
	376	ROUND_UP (dst_section->SizeOfRawData,
	377	dst_nt_header->OptionalHeader.FileAlignment);
	378
7466aec4 AI	379	/* Align the next section's raw data area. */
	380	ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment);
	381
6012853d AI	382	section++;
	383	dst_section++;
	384	}
	385
6012853d AI	386	/* Add the extra section entry (which adds no raw data). */
	387	if (new_section_name != NULL)
	388	{
	389	dst_nt_header->FileHeader.NumberOfSections++;
	390	dst_nt_header->OptionalHeader.SizeOfImage += new_section_size;
	391	strncpy (dst_section->Name, new_section_name, sizeof (dst_section->Name));
	392	dst_section->VirtualAddress =
	393	section[-1].VirtualAddress
	394	+ ROUND_UP (section[-1].Misc.VirtualSize,
	395	dst_nt_header->OptionalHeader.SectionAlignment);
	396	dst_section->Misc.VirtualSize = new_section_size;
	397	dst_section->PointerToRawData = 0;
	398	dst_section->SizeOfRawData = 0;
	399	dst_section->Characteristics =
	400	IMAGE_SCN_CNT_UNINITIALIZED_DATA
	401	\| IMAGE_SCN_MEM_READ
	402	\| IMAGE_SCN_MEM_WRITE;
	403	}
	404
	405	/* Copy remainder of source image. */
	406	section--;
	407	offset = ROUND_UP (section->PointerToRawData + section->SizeOfRawData,
	408	nt_header->OptionalHeader.FileAlignment);
	409	COPY_CHUNK
	410	("Copying remainder of executable...",
	411	OFFSET_TO_PTR (offset, p_infile),
d2fcf769	412	p_infile->size - offset, be_verbose);
6012853d AI	413
	414	/* Final size for new image. */
	415	p_outfile->size = DST_TO_OFFSET ();
	416
	417	/* Now patch up remaining file-relative offsets. */
	418	section = IMAGE_FIRST_SECTION (nt_header);
	419	dst_section = IMAGE_FIRST_SECTION (dst_nt_header);
	420
	421	#define ADJUST_OFFSET(var) \
	422	do { \
	423	if ((var) != 0) \
	424	(var) = relocate_offset ((var), nt_header, dst_nt_header); \
	425	} while (0)
	426
	427	dst_nt_header->OptionalHeader.SizeOfInitializedData = 0;
	428	dst_nt_header->OptionalHeader.SizeOfUninitializedData = 0;
	429	for (i = 0; i < dst_nt_header->FileHeader.NumberOfSections; i++)
	430	{
	431	/* Recompute data sizes for completeness. */
	432	if (dst_section[i].Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA)
	433	dst_nt_header->OptionalHeader.SizeOfInitializedData +=
	434	ROUND_UP (dst_section[i].Misc.VirtualSize, dst_nt_header->OptionalHeader.FileAlignment);
	435	else if (dst_section[i].Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA)
	436	dst_nt_header->OptionalHeader.SizeOfUninitializedData +=
	437	ROUND_UP (dst_section[i].Misc.VirtualSize, dst_nt_header->OptionalHeader.FileAlignment);
	438
	439	ADJUST_OFFSET (dst_section[i].PointerToLinenumbers);
	440	}
	441
	442	ADJUST_OFFSET (dst_nt_header->FileHeader.PointerToSymbolTable);
	443
	444	/* Update offsets in debug directory entries. */
	445	{
	446	IMAGE_DATA_DIRECTORY debug_dir =
	447	dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG];
	448	PIMAGE_DEBUG_DIRECTORY debug_entry;
	449
	450	section = rva_to_section (debug_dir.VirtualAddress, dst_nt_header);
	451	if (section)
	452	{
	453	debug_entry = (PIMAGE_DEBUG_DIRECTORY)
	454	(RVA_TO_OFFSET (debug_dir.VirtualAddress, section) + p_outfile->file_base);
	455	debug_dir.Size /= sizeof (IMAGE_DEBUG_DIRECTORY);
	456
	457	for (i = 0; i < debug_dir.Size; i++, debug_entry++)
	458	ADJUST_OFFSET (debug_entry->PointerToRawData);
	459	}
	460	}
	461	}
	462
	463
	464	int
	465	main (int argc, char **argv)
	466	{
	467	file_data in_file, out_file;
	468	char out_filename[MAX_PATH], in_filename[MAX_PATH];
	469	unsigned long size;
	470	PIMAGE_DOS_HEADER dos_header;
	471	PIMAGE_NT_HEADERS nt_header;
	472
	473	#define OLD_NAME argv[1]
	474	#define NEW_NAME argv[2]
	475	#define SECTION_NAME argv[3]
	476	#define SECTION_SIZE argv[4]
477
478	strcpy (in_filename, OLD_NAME);
479	strcpy (out_filename, NEW_NAME);
480
481	printf ("Dumping from %s\n", in_filename);
482	printf (" to %s\n", out_filename);
483
484	/* Open the undumped executable file. */
485	if (!open_input_file (&in_file, in_filename))
486	{
177c0ea7	487	printf ("Failed to open %s (%d)...bailing.\n",
6012853d AI	488	in_filename, GetLastError ());
	489	exit (1);
	490	}
	491	dos_header = (PIMAGE_DOS_HEADER) in_file.file_base;
	492	nt_header = (PIMAGE_NT_HEADERS) ((char *) dos_header + dos_header->e_lfanew);
	493	/* Allow for expansion due to increasing file align to section align.
	494	We can overestimate here, since close_file_data will update the
	495	size exactly. */
	496	size = in_file.size
	497	+ nt_header->OptionalHeader.SectionAlignment
	498	* nt_header->FileHeader.NumberOfSections;
	499	if (!open_output_file (&out_file, out_filename, size))
	500	{
177c0ea7	501	printf ("Failed to open %s (%d)...bailing.\n",
6012853d AI	502	out_filename, GetLastError ());
	503	exit (1);
	504	}
	505
	506	copy_executable_and_add_section (&in_file, &out_file,
	507	SECTION_NAME,
	508	atoi (SECTION_SIZE) * 1024 * 1024);
	509
	510	/* Patch up header fields; profiler is picky about this. */
	511	{
	512	HANDLE hImagehelp = LoadLibrary ("imagehlp.dll");
62aba0d4 FP	513	DWORD_PTR headersum;
62aba0d4 FP	514	DWORD_PTR checksum;
6012853d AI	515
	516	dos_header = (PIMAGE_DOS_HEADER) out_file.file_base;
	517	nt_header = (PIMAGE_NT_HEADERS) ((char *) dos_header + dos_header->e_lfanew);
	518
	519	nt_header->OptionalHeader.CheckSum = 0;
	520	// nt_header->FileHeader.TimeDateStamp = time (NULL);
	521	// dos_header->e_cp = size / 512;
	522	// nt_header->OptionalHeader.SizeOfImage = size;
	523
	524	pfnCheckSumMappedFile = (void *) GetProcAddress (hImagehelp, "CheckSumMappedFile");
	525	if (pfnCheckSumMappedFile)
	526	{
	527	// nt_header->FileHeader.TimeDateStamp = time (NULL);
	528	pfnCheckSumMappedFile (out_file.file_base,
	529	out_file.size,
	530	&headersum,
	531	&checksum);
	532	nt_header->OptionalHeader.CheckSum = checksum;
	533	}
	534	FreeLibrary (hImagehelp);
	535	}
	536
	537	close_file_data (&in_file);
	538	close_file_data (&out_file);
	539
	540	return 0;
	541	}
	542
	543	/* eof */
ab5796a9	544