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

/* Add an uninitialized data section to an executable.
   Copyright (C) 1999, 2001-2012  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>
#ifdef __GNUC__
#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) (LPVOID BaseAddress,
				     DWORD FileLength,
				     LPDWORD HeaderSum,
				     LPDWORD 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 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 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 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
relocate_offset (DWORD 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)(offset) - section->PointerToRawData))

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

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

/* Convert address in executing image to RVA.  */
#define PTR_TO_RVA(ptr) ((DWORD)(ptr) - (DWORD) 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)(offset))

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


static void
copy_executable_and_add_section (file_data *p_infile,
				 file_data *p_outfile,
				 const char *new_section_name,
				 DWORD 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 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 long) 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) nt_header - (DWORD) dos_header, be_verbose);
  dst_nt_header = (PIMAGE_NT_HEADERS) dst;
  COPY_CHUNK ("Copying NT header...", nt_header,
	      (DWORD) section - (DWORD) 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  headersum;
    DWORD  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.
acaf905b	2	Copyright (C) 1999, 2001-2012 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>
a1375c9f AI	28	#ifdef __GNUC__
	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
	38	(__stdcall * pfnCheckSumMappedFile) (LPVOID BaseAddress,
0597ab06 JB	39	DWORD FileLength,
	40	LPDWORD HeaderSum,
	41	LPDWORD 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 *
	167	rva_to_section (DWORD rva, IMAGE_NT_HEADERS * nt_header)
	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. */
	182	DWORD real_size = max (section->SizeOfRawData,
	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 *
	195	offset_to_section (DWORD offset, IMAGE_NT_HEADERS * nt_header)
	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). */
215	static DWORD
216	relocate_offset (DWORD offset,
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) \
250	(section->VirtualAddress + ((DWORD)(offset) - section->PointerToRawData))
251
252	#define RVA_TO_OFFSET(rva, section) \
253	(section->PointerToRawData + ((DWORD)(rva) - section->VirtualAddress))
254
255	#define RVA_TO_SECTION_OFFSET(rva, section) \
256	((DWORD)(rva) - section->VirtualAddress)
257
258	/* Convert address in executing image to RVA. */
259	#define PTR_TO_RVA(ptr) ((DWORD)(ptr) - (DWORD) GetModuleHandle (NULL))
260
261	#define PTR_TO_OFFSET(ptr, pfile_data) \
0597ab06	262	((unsigned const char *)(ptr) - (pfile_data)->file_base)
6012853d AI	263
	264	#define OFFSET_TO_PTR(offset, pfile_data) \
	265	((pfile_data)->file_base + (DWORD)(offset))
	266
	267	#define ROUND_UP(p, align) (((DWORD)(p) + (align)-1) & ~((align)-1))
	268	#define ROUND_DOWN(p, align) ((DWORD)(p) & ~((align)-1))
	269
	270
	271	static void
177c0ea7	272	copy_executable_and_add_section (file_data *p_infile,
6012853d	273	file_data *p_outfile,
0597ab06	274	const char *new_section_name,
6012853d AI	275	DWORD new_section_size)
	276	{
	277	unsigned char *dst;
	278	PIMAGE_DOS_HEADER dos_header;
	279	PIMAGE_NT_HEADERS nt_header;
	280	PIMAGE_NT_HEADERS dst_nt_header;
	281	PIMAGE_SECTION_HEADER section;
	282	PIMAGE_SECTION_HEADER dst_section;
	283	DWORD offset;
	284	int i;
d2fcf769	285	int be_verbose = GetEnvironmentVariable ("DEBUG_DUMP", NULL, 0) > 0;
6012853d	286
d2fcf769	287	#define COPY_CHUNK(message, src, size, verbose) \
6012853d	288	do { \
0597ab06	289	unsigned const char s = (void )(src); \
6012853d	290	unsigned long count = (size); \
d2fcf769 EZ	291	if (verbose) \
	292	{ \
	293	printf ("%s\n", (message)); \
	294	printf ("\t0x%08x Offset in input file.\n", s - p_infile->file_base); \
	295	printf ("\t0x%08x Offset in output file.\n", dst - p_outfile->file_base); \
	296	printf ("\t0x%08x Size in bytes.\n", count); \
	297	} \
6012853d AI	298	memcpy (dst, s, count); \
	299	dst += count; \
	300	} while (0)
	301
	302	#define DST_TO_OFFSET() PTR_TO_OFFSET (dst, p_outfile)
7466aec4 AI	303	#define ROUND_UP_DST_AND_ZERO(align) \
	304	do { \
	305	unsigned char *newdst = p_outfile->file_base \
	306	+ ROUND_UP (DST_TO_OFFSET (), (align)); \
	307	/* Zero the alignment slop; it may actually initialize real data. */ \
	308	memset (dst, 0, newdst - dst); \
	309	dst = newdst; \
	310	} while (0)
6012853d AI	311
	312	/* Copy the source image sequentially, ie. section by section after
	313	copying the headers and section table, to simplify the process of
	314	adding an extra section table entry (which might force the raw
	315	section data to be relocated).
	316
	317	Note that dst is updated implicitly by each COPY_CHUNK. */
	318
	319	dos_header = (PIMAGE_DOS_HEADER) p_infile->file_base;
177c0ea7	320	nt_header = (PIMAGE_NT_HEADERS) (((unsigned long) dos_header) +
6012853d AI	321	dos_header->e_lfanew);
6012853d AI	322	section = IMAGE_FIRST_SECTION (nt_header);
177c0ea7	323
6012853d AI	324	dst = (unsigned char *) p_outfile->file_base;
	325
	326	COPY_CHUNK ("Copying DOS header...", dos_header,
d2fcf769	327	(DWORD) nt_header - (DWORD) dos_header, be_verbose);
6012853d AI	328	dst_nt_header = (PIMAGE_NT_HEADERS) dst;
6012853d AI	329	COPY_CHUNK ("Copying NT header...", nt_header,
d2fcf769	330	(DWORD) section - (DWORD) nt_header, be_verbose);
6012853d AI	331	dst_section = (PIMAGE_SECTION_HEADER) dst;
6012853d AI	332	COPY_CHUNK ("Copying section table...", section,
d2fcf769 EZ	333	nt_header->FileHeader.NumberOfSections * sizeof (*section),
d2fcf769 EZ	334	be_verbose);
6012853d AI	335
	336	/* To improve the efficiency of demand loading, make the file
	337	alignment match the section alignment (VC++ 6.0 does this by
	338	default anyway). */
	339	dst_nt_header->OptionalHeader.FileAlignment =
	340	dst_nt_header->OptionalHeader.SectionAlignment;
	341
	342	/* Add an uninitialized data section at the end, of the specified name
	343	and virtual size. */
	344	if (find_section (new_section_name, nt_header) == NULL)
	345	/* Leave room for extra section table entry; filled in below. */
	346	dst += sizeof (*section);
	347	else
	348	new_section_name = NULL;
	349
7466aec4 AI	350	/* Align the first section's raw data area, and set the header size
	351	field accordingly. */
	352	ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment);
	353	dst_nt_header->OptionalHeader.SizeOfHeaders = DST_TO_OFFSET ();
	354
6012853d AI	355	for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++)
	356	{
	357	char msg[100];
d2fcf769 EZ	358	/* Windows section names are fixed 8-char strings, only
	359	zero-terminated if the name is shorter than 8 characters. */
	360	sprintf (msg, "Copying raw data for %.8s...", section->Name);
6012853d	361
6012853d AI	362	/* Update the file-relative offset for this section's raw data (if
	363	it has any) in case things have been relocated; we will update
	364	the other offsets below once we know where everything is. */
	365	if (dst_section->PointerToRawData)
	366	dst_section->PointerToRawData = DST_TO_OFFSET ();
	367
	368	/* Can always copy the original raw data. */
	369	COPY_CHUNK
	370	(msg, OFFSET_TO_PTR (section->PointerToRawData, p_infile),
d2fcf769	371	section->SizeOfRawData, be_verbose);
6012853d AI	372
	373	/* Round up the raw data size to the new alignment. */
	374	dst_section->SizeOfRawData =
	375	ROUND_UP (dst_section->SizeOfRawData,
	376	dst_nt_header->OptionalHeader.FileAlignment);
	377
7466aec4 AI	378	/* Align the next section's raw data area. */
	379	ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment);
	380
6012853d AI	381	section++;
	382	dst_section++;
	383	}
	384
6012853d AI	385	/* Add the extra section entry (which adds no raw data). */
	386	if (new_section_name != NULL)
	387	{
	388	dst_nt_header->FileHeader.NumberOfSections++;
	389	dst_nt_header->OptionalHeader.SizeOfImage += new_section_size;
	390	strncpy (dst_section->Name, new_section_name, sizeof (dst_section->Name));
	391	dst_section->VirtualAddress =
	392	section[-1].VirtualAddress
	393	+ ROUND_UP (section[-1].Misc.VirtualSize,
	394	dst_nt_header->OptionalHeader.SectionAlignment);
	395	dst_section->Misc.VirtualSize = new_section_size;
	396	dst_section->PointerToRawData = 0;
	397	dst_section->SizeOfRawData = 0;
	398	dst_section->Characteristics =
	399	IMAGE_SCN_CNT_UNINITIALIZED_DATA
	400	\| IMAGE_SCN_MEM_READ
	401	\| IMAGE_SCN_MEM_WRITE;
	402	}
	403
	404	/* Copy remainder of source image. */
	405	section--;
	406	offset = ROUND_UP (section->PointerToRawData + section->SizeOfRawData,
	407	nt_header->OptionalHeader.FileAlignment);
	408	COPY_CHUNK
	409	("Copying remainder of executable...",
	410	OFFSET_TO_PTR (offset, p_infile),
d2fcf769	411	p_infile->size - offset, be_verbose);
6012853d AI	412
	413	/* Final size for new image. */
	414	p_outfile->size = DST_TO_OFFSET ();
	415
	416	/* Now patch up remaining file-relative offsets. */
	417	section = IMAGE_FIRST_SECTION (nt_header);
	418	dst_section = IMAGE_FIRST_SECTION (dst_nt_header);
	419
	420	#define ADJUST_OFFSET(var) \
	421	do { \
	422	if ((var) != 0) \
	423	(var) = relocate_offset ((var), nt_header, dst_nt_header); \
	424	} while (0)
	425
	426	dst_nt_header->OptionalHeader.SizeOfInitializedData = 0;
	427	dst_nt_header->OptionalHeader.SizeOfUninitializedData = 0;
	428	for (i = 0; i < dst_nt_header->FileHeader.NumberOfSections; i++)
	429	{
	430	/* Recompute data sizes for completeness. */
	431	if (dst_section[i].Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA)
	432	dst_nt_header->OptionalHeader.SizeOfInitializedData +=
	433	ROUND_UP (dst_section[i].Misc.VirtualSize, dst_nt_header->OptionalHeader.FileAlignment);
	434	else if (dst_section[i].Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA)
	435	dst_nt_header->OptionalHeader.SizeOfUninitializedData +=
	436	ROUND_UP (dst_section[i].Misc.VirtualSize, dst_nt_header->OptionalHeader.FileAlignment);
	437
	438	ADJUST_OFFSET (dst_section[i].PointerToLinenumbers);
	439	}
	440
	441	ADJUST_OFFSET (dst_nt_header->FileHeader.PointerToSymbolTable);
	442
	443	/* Update offsets in debug directory entries. */
	444	{
	445	IMAGE_DATA_DIRECTORY debug_dir =
	446	dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG];
	447	PIMAGE_DEBUG_DIRECTORY debug_entry;
	448
	449	section = rva_to_section (debug_dir.VirtualAddress, dst_nt_header);
	450	if (section)
	451	{
	452	debug_entry = (PIMAGE_DEBUG_DIRECTORY)
	453	(RVA_TO_OFFSET (debug_dir.VirtualAddress, section) + p_outfile->file_base);
	454	debug_dir.Size /= sizeof (IMAGE_DEBUG_DIRECTORY);
	455
	456	for (i = 0; i < debug_dir.Size; i++, debug_entry++)
	457	ADJUST_OFFSET (debug_entry->PointerToRawData);
	458	}
	459	}
	460	}
	461
	462
	463	int
	464	main (int argc, char **argv)
	465	{
	466	file_data in_file, out_file;
	467	char out_filename[MAX_PATH], in_filename[MAX_PATH];
	468	unsigned long size;
	469	PIMAGE_DOS_HEADER dos_header;
	470	PIMAGE_NT_HEADERS nt_header;
	471
	472	#define OLD_NAME argv[1]
	473	#define NEW_NAME argv[2]
	474	#define SECTION_NAME argv[3]
	475	#define SECTION_SIZE argv[4]
476
477	strcpy (in_filename, OLD_NAME);
478	strcpy (out_filename, NEW_NAME);
479
480	printf ("Dumping from %s\n", in_filename);
481	printf (" to %s\n", out_filename);
482
483	/* Open the undumped executable file. */
484	if (!open_input_file (&in_file, in_filename))
485	{
177c0ea7	486	printf ("Failed to open %s (%d)...bailing.\n",
6012853d AI	487	in_filename, GetLastError ());
	488	exit (1);
	489	}
	490	dos_header = (PIMAGE_DOS_HEADER) in_file.file_base;
	491	nt_header = (PIMAGE_NT_HEADERS) ((char *) dos_header + dos_header->e_lfanew);
	492	/* Allow for expansion due to increasing file align to section align.
	493	We can overestimate here, since close_file_data will update the
	494	size exactly. */
	495	size = in_file.size
	496	+ nt_header->OptionalHeader.SectionAlignment
	497	* nt_header->FileHeader.NumberOfSections;
	498	if (!open_output_file (&out_file, out_filename, size))
	499	{
177c0ea7	500	printf ("Failed to open %s (%d)...bailing.\n",
6012853d AI	501	out_filename, GetLastError ());
	502	exit (1);
	503	}
	504
	505	copy_executable_and_add_section (&in_file, &out_file,
	506	SECTION_NAME,
	507	atoi (SECTION_SIZE) * 1024 * 1024);
	508
	509	/* Patch up header fields; profiler is picky about this. */
	510	{
	511	HANDLE hImagehelp = LoadLibrary ("imagehlp.dll");
	512	DWORD headersum;
	513	DWORD checksum;
	514
	515	dos_header = (PIMAGE_DOS_HEADER) out_file.file_base;
	516	nt_header = (PIMAGE_NT_HEADERS) ((char *) dos_header + dos_header->e_lfanew);
	517
	518	nt_header->OptionalHeader.CheckSum = 0;
	519	// nt_header->FileHeader.TimeDateStamp = time (NULL);
	520	// dos_header->e_cp = size / 512;
	521	// nt_header->OptionalHeader.SizeOfImage = size;
	522
	523	pfnCheckSumMappedFile = (void *) GetProcAddress (hImagehelp, "CheckSumMappedFile");
	524	if (pfnCheckSumMappedFile)
	525	{
	526	// nt_header->FileHeader.TimeDateStamp = time (NULL);
	527	pfnCheckSumMappedFile (out_file.file_base,
	528	out_file.size,
	529	&headersum,
	530	&checksum);
	531	nt_header->OptionalHeader.CheckSum = checksum;
	532	}
	533	FreeLibrary (hImagehelp);
	534	}
	535
	536	close_file_data (&in_file);
	537	close_file_data (&out_file);
	538
	539	return 0;
	540	}
	541
	542	/* eof */
ab5796a9	543