mirror of
https://git.savannah.gnu.org/git/emacs.git
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544 lines
17 KiB
C
544 lines
17 KiB
C
/* Add an uninitialized data section to an executable.
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Copyright (C) 1999, 2001-2011 Free Software Foundation, Inc.
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This file is part of GNU Emacs.
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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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GNU Emacs is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>.
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Andrew Innes <andrewi@harlequin.co.uk> 04-Jan-1999
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based on code from unexw32.c
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <time.h>
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#ifdef __GNUC__
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#define _ANONYMOUS_UNION
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#define _ANONYMOUS_STRUCT
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#endif
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#include <windows.h>
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/* Include relevant definitions from IMAGEHLP.H, which can be found
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in \\win32sdk\mstools\samples\image\include\imagehlp.h. */
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PIMAGE_NT_HEADERS
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(__stdcall * pfnCheckSumMappedFile) (LPVOID BaseAddress,
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DWORD FileLength,
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LPDWORD HeaderSum,
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LPDWORD CheckSum);
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#undef min
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#undef max
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#define min(x, y) (((x) < (y)) ? (x) : (y))
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#define max(x, y) (((x) > (y)) ? (x) : (y))
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/* File handling. */
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typedef struct file_data {
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const char *name;
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unsigned long size;
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HANDLE file;
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HANDLE file_mapping;
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unsigned char *file_base;
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} file_data;
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int
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open_input_file (file_data *p_file, const char *filename)
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{
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HANDLE file;
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HANDLE file_mapping;
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void *file_base;
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unsigned long size, upper_size;
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file = CreateFile (filename, GENERIC_READ, FILE_SHARE_READ, NULL,
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OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
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if (file == INVALID_HANDLE_VALUE)
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return FALSE;
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size = GetFileSize (file, &upper_size);
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file_mapping = CreateFileMapping (file, NULL, PAGE_READONLY,
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0, size, NULL);
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if (!file_mapping)
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return FALSE;
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file_base = MapViewOfFile (file_mapping, FILE_MAP_READ, 0, 0, size);
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if (file_base == 0)
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return FALSE;
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p_file->name = filename;
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p_file->size = size;
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p_file->file = file;
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p_file->file_mapping = file_mapping;
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p_file->file_base = file_base;
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return TRUE;
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}
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int
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open_output_file (file_data *p_file, const char *filename, unsigned long size)
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{
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HANDLE file;
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HANDLE file_mapping;
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void *file_base;
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file = CreateFile (filename, GENERIC_READ | GENERIC_WRITE, 0, NULL,
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CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
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if (file == INVALID_HANDLE_VALUE)
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return FALSE;
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file_mapping = CreateFileMapping (file, NULL, PAGE_READWRITE,
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0, size, NULL);
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if (!file_mapping)
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return FALSE;
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file_base = MapViewOfFile (file_mapping, FILE_MAP_WRITE, 0, 0, size);
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if (file_base == 0)
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return FALSE;
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p_file->name = filename;
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p_file->size = size;
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p_file->file = file;
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p_file->file_mapping = file_mapping;
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p_file->file_base = file_base;
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return TRUE;
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}
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/* Close the system structures associated with the given file. */
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void
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close_file_data (file_data *p_file)
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{
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UnmapViewOfFile (p_file->file_base);
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CloseHandle (p_file->file_mapping);
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/* For the case of output files, set final size. */
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SetFilePointer (p_file->file, p_file->size, NULL, FILE_BEGIN);
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SetEndOfFile (p_file->file);
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CloseHandle (p_file->file);
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}
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/* Routines to manipulate NT executable file sections. */
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unsigned long
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get_unrounded_section_size (PIMAGE_SECTION_HEADER p_section)
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{
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/* The true section size, before rounding, for an initialized data or
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code section. (Supposedly some linkers swap the meaning of these
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two values.) */
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return min (p_section->SizeOfRawData,
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p_section->Misc.VirtualSize);
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}
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/* Return pointer to section header for named section. */
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IMAGE_SECTION_HEADER *
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find_section (const char *name, IMAGE_NT_HEADERS *nt_header)
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{
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PIMAGE_SECTION_HEADER section;
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int i;
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section = IMAGE_FIRST_SECTION (nt_header);
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for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++)
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{
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if (strcmp (section->Name, name) == 0)
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return section;
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section++;
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}
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return NULL;
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}
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/* Return pointer to section header for section containing the given
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relative virtual address. */
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IMAGE_SECTION_HEADER *
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rva_to_section (DWORD rva, IMAGE_NT_HEADERS * nt_header)
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{
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PIMAGE_SECTION_HEADER section;
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int i;
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section = IMAGE_FIRST_SECTION (nt_header);
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for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++)
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{
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/* Some linkers (eg. the NT SDK linker I believe) swapped the
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meaning of these two values - or rather, they ignored
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VirtualSize entirely and always set it to zero. This affects
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some very old exes (eg. gzip dated Dec 1993). Since
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w32_executable_type relies on this function to work reliably,
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we need to cope with this. */
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DWORD real_size = max (section->SizeOfRawData,
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section->Misc.VirtualSize);
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if (rva >= section->VirtualAddress
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&& rva < section->VirtualAddress + real_size)
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return section;
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section++;
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}
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return NULL;
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}
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/* Return pointer to section header for section containing the given
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offset in its raw data area. */
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IMAGE_SECTION_HEADER *
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offset_to_section (DWORD offset, IMAGE_NT_HEADERS * nt_header)
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{
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PIMAGE_SECTION_HEADER section;
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int i;
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section = IMAGE_FIRST_SECTION (nt_header);
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for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++)
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{
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if (offset >= section->PointerToRawData
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&& offset < section->PointerToRawData + section->SizeOfRawData)
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return section;
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section++;
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}
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return NULL;
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}
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/* Return offset to an object in dst, given offset in src. We assume
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there is at least one section in both src and dst images, and that
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the some sections may have been added to dst (after sections in src). */
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static DWORD
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relocate_offset (DWORD offset,
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IMAGE_NT_HEADERS * src_nt_header,
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IMAGE_NT_HEADERS * dst_nt_header)
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{
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PIMAGE_SECTION_HEADER src_section = IMAGE_FIRST_SECTION (src_nt_header);
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PIMAGE_SECTION_HEADER dst_section = IMAGE_FIRST_SECTION (dst_nt_header);
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int i = 0;
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while (offset >= src_section->PointerToRawData)
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{
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if (offset < src_section->PointerToRawData + src_section->SizeOfRawData)
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break;
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i++;
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if (i == src_nt_header->FileHeader.NumberOfSections)
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{
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/* Handle offsets after the last section. */
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dst_section = IMAGE_FIRST_SECTION (dst_nt_header);
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dst_section += dst_nt_header->FileHeader.NumberOfSections - 1;
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while (dst_section->PointerToRawData == 0)
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dst_section--;
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while (src_section->PointerToRawData == 0)
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src_section--;
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return offset
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+ (dst_section->PointerToRawData + dst_section->SizeOfRawData)
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- (src_section->PointerToRawData + src_section->SizeOfRawData);
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}
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src_section++;
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dst_section++;
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}
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return offset +
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(dst_section->PointerToRawData - src_section->PointerToRawData);
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}
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#define OFFSET_TO_RVA(offset, section) \
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(section->VirtualAddress + ((DWORD)(offset) - section->PointerToRawData))
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#define RVA_TO_OFFSET(rva, section) \
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(section->PointerToRawData + ((DWORD)(rva) - section->VirtualAddress))
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#define RVA_TO_SECTION_OFFSET(rva, section) \
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((DWORD)(rva) - section->VirtualAddress)
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/* Convert address in executing image to RVA. */
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#define PTR_TO_RVA(ptr) ((DWORD)(ptr) - (DWORD) GetModuleHandle (NULL))
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#define PTR_TO_OFFSET(ptr, pfile_data) \
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((unsigned const char *)(ptr) - (pfile_data)->file_base)
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#define OFFSET_TO_PTR(offset, pfile_data) \
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((pfile_data)->file_base + (DWORD)(offset))
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#define ROUND_UP(p, align) (((DWORD)(p) + (align)-1) & ~((align)-1))
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#define ROUND_DOWN(p, align) ((DWORD)(p) & ~((align)-1))
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static void
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copy_executable_and_add_section (file_data *p_infile,
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file_data *p_outfile,
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const char *new_section_name,
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DWORD new_section_size)
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{
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unsigned char *dst;
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PIMAGE_DOS_HEADER dos_header;
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PIMAGE_NT_HEADERS nt_header;
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PIMAGE_NT_HEADERS dst_nt_header;
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PIMAGE_SECTION_HEADER section;
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PIMAGE_SECTION_HEADER dst_section;
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DWORD offset;
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int i;
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int be_verbose = GetEnvironmentVariable ("DEBUG_DUMP", NULL, 0) > 0;
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#define COPY_CHUNK(message, src, size, verbose) \
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do { \
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unsigned const char *s = (void *)(src); \
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unsigned long count = (size); \
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if (verbose) \
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{ \
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printf ("%s\n", (message)); \
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printf ("\t0x%08x Offset in input file.\n", s - p_infile->file_base); \
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printf ("\t0x%08x Offset in output file.\n", dst - p_outfile->file_base); \
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printf ("\t0x%08x Size in bytes.\n", count); \
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} \
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memcpy (dst, s, count); \
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dst += count; \
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} while (0)
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#define DST_TO_OFFSET() PTR_TO_OFFSET (dst, p_outfile)
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#define ROUND_UP_DST_AND_ZERO(align) \
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do { \
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unsigned char *newdst = p_outfile->file_base \
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+ ROUND_UP (DST_TO_OFFSET (), (align)); \
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/* Zero the alignment slop; it may actually initialize real data. */ \
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memset (dst, 0, newdst - dst); \
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dst = newdst; \
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} while (0)
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/* Copy the source image sequentially, ie. section by section after
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copying the headers and section table, to simplify the process of
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adding an extra section table entry (which might force the raw
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section data to be relocated).
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Note that dst is updated implicitly by each COPY_CHUNK. */
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dos_header = (PIMAGE_DOS_HEADER) p_infile->file_base;
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nt_header = (PIMAGE_NT_HEADERS) (((unsigned long) dos_header) +
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dos_header->e_lfanew);
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section = IMAGE_FIRST_SECTION (nt_header);
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dst = (unsigned char *) p_outfile->file_base;
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COPY_CHUNK ("Copying DOS header...", dos_header,
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(DWORD) nt_header - (DWORD) dos_header, be_verbose);
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dst_nt_header = (PIMAGE_NT_HEADERS) dst;
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COPY_CHUNK ("Copying NT header...", nt_header,
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(DWORD) section - (DWORD) nt_header, be_verbose);
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dst_section = (PIMAGE_SECTION_HEADER) dst;
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COPY_CHUNK ("Copying section table...", section,
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nt_header->FileHeader.NumberOfSections * sizeof (*section),
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be_verbose);
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/* To improve the efficiency of demand loading, make the file
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alignment match the section alignment (VC++ 6.0 does this by
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default anyway). */
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dst_nt_header->OptionalHeader.FileAlignment =
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dst_nt_header->OptionalHeader.SectionAlignment;
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/* Add an uninitialized data section at the end, of the specified name
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and virtual size. */
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if (find_section (new_section_name, nt_header) == NULL)
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/* Leave room for extra section table entry; filled in below. */
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dst += sizeof (*section);
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else
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new_section_name = NULL;
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/* Align the first section's raw data area, and set the header size
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field accordingly. */
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ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment);
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dst_nt_header->OptionalHeader.SizeOfHeaders = DST_TO_OFFSET ();
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for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++)
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{
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char msg[100];
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/* Windows section names are fixed 8-char strings, only
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zero-terminated if the name is shorter than 8 characters. */
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sprintf (msg, "Copying raw data for %.8s...", section->Name);
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/* Update the file-relative offset for this section's raw data (if
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it has any) in case things have been relocated; we will update
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the other offsets below once we know where everything is. */
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if (dst_section->PointerToRawData)
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dst_section->PointerToRawData = DST_TO_OFFSET ();
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/* Can always copy the original raw data. */
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COPY_CHUNK
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(msg, OFFSET_TO_PTR (section->PointerToRawData, p_infile),
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section->SizeOfRawData, be_verbose);
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/* Round up the raw data size to the new alignment. */
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dst_section->SizeOfRawData =
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ROUND_UP (dst_section->SizeOfRawData,
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dst_nt_header->OptionalHeader.FileAlignment);
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/* Align the next section's raw data area. */
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ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment);
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section++;
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dst_section++;
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}
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/* Add the extra section entry (which adds no raw data). */
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if (new_section_name != NULL)
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{
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dst_nt_header->FileHeader.NumberOfSections++;
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dst_nt_header->OptionalHeader.SizeOfImage += new_section_size;
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strncpy (dst_section->Name, new_section_name, sizeof (dst_section->Name));
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dst_section->VirtualAddress =
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section[-1].VirtualAddress
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+ ROUND_UP (section[-1].Misc.VirtualSize,
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dst_nt_header->OptionalHeader.SectionAlignment);
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dst_section->Misc.VirtualSize = new_section_size;
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dst_section->PointerToRawData = 0;
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dst_section->SizeOfRawData = 0;
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dst_section->Characteristics =
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IMAGE_SCN_CNT_UNINITIALIZED_DATA
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| IMAGE_SCN_MEM_READ
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| IMAGE_SCN_MEM_WRITE;
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}
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/* Copy remainder of source image. */
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section--;
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offset = ROUND_UP (section->PointerToRawData + section->SizeOfRawData,
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nt_header->OptionalHeader.FileAlignment);
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COPY_CHUNK
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("Copying remainder of executable...",
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OFFSET_TO_PTR (offset, p_infile),
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p_infile->size - offset, be_verbose);
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/* Final size for new image. */
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p_outfile->size = DST_TO_OFFSET ();
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/* Now patch up remaining file-relative offsets. */
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section = IMAGE_FIRST_SECTION (nt_header);
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dst_section = IMAGE_FIRST_SECTION (dst_nt_header);
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#define ADJUST_OFFSET(var) \
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do { \
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if ((var) != 0) \
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(var) = relocate_offset ((var), nt_header, dst_nt_header); \
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} while (0)
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dst_nt_header->OptionalHeader.SizeOfInitializedData = 0;
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dst_nt_header->OptionalHeader.SizeOfUninitializedData = 0;
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for (i = 0; i < dst_nt_header->FileHeader.NumberOfSections; i++)
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{
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/* Recompute data sizes for completeness. */
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if (dst_section[i].Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA)
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dst_nt_header->OptionalHeader.SizeOfInitializedData +=
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ROUND_UP (dst_section[i].Misc.VirtualSize, dst_nt_header->OptionalHeader.FileAlignment);
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else if (dst_section[i].Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA)
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dst_nt_header->OptionalHeader.SizeOfUninitializedData +=
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ROUND_UP (dst_section[i].Misc.VirtualSize, dst_nt_header->OptionalHeader.FileAlignment);
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ADJUST_OFFSET (dst_section[i].PointerToLinenumbers);
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}
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ADJUST_OFFSET (dst_nt_header->FileHeader.PointerToSymbolTable);
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/* Update offsets in debug directory entries. */
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{
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IMAGE_DATA_DIRECTORY debug_dir =
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dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG];
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PIMAGE_DEBUG_DIRECTORY debug_entry;
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section = rva_to_section (debug_dir.VirtualAddress, dst_nt_header);
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if (section)
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{
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debug_entry = (PIMAGE_DEBUG_DIRECTORY)
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(RVA_TO_OFFSET (debug_dir.VirtualAddress, section) + p_outfile->file_base);
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debug_dir.Size /= sizeof (IMAGE_DEBUG_DIRECTORY);
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for (i = 0; i < debug_dir.Size; i++, debug_entry++)
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ADJUST_OFFSET (debug_entry->PointerToRawData);
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}
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}
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}
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int
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main (int argc, char **argv)
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{
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file_data in_file, out_file;
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char out_filename[MAX_PATH], in_filename[MAX_PATH];
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unsigned long size;
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PIMAGE_DOS_HEADER dos_header;
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PIMAGE_NT_HEADERS nt_header;
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#define OLD_NAME argv[1]
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#define NEW_NAME argv[2]
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#define SECTION_NAME argv[3]
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#define SECTION_SIZE argv[4]
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strcpy (in_filename, OLD_NAME);
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strcpy (out_filename, NEW_NAME);
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printf ("Dumping from %s\n", in_filename);
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printf (" to %s\n", out_filename);
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/* Open the undumped executable file. */
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if (!open_input_file (&in_file, in_filename))
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{
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printf ("Failed to open %s (%d)...bailing.\n",
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in_filename, GetLastError ());
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exit (1);
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}
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dos_header = (PIMAGE_DOS_HEADER) in_file.file_base;
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|
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 */
|
|
|