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365e01cc9f
Run "TZ=UTC0 admin/update-copyright $(git ls-files)".
828 lines
28 KiB
C
828 lines
28 KiB
C
/* Pre-process emacs.exe for profiling by MSVC.
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Copyright (C) 1999, 2001-2020 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 (at
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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 <https://www.gnu.org/licenses/>.
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Andrew Innes <andrewi@harlequin.co.uk> 16-Jan-1999
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based on code from addsection.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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#if defined(__GNUC__) && !defined(MINGW_W64)
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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 (__stdcall * pfnCheckSumMappedFile) (LPVOID BaseAddress,
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DWORD_PTR FileLength,
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PDWORD_PTR HeaderSum,
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PDWORD_PTR 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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int
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open_inout_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 | GENERIC_WRITE, 0, 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_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_PTR 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_PTR 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_PTR 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_PTR
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relocate_offset (DWORD_PTR 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_PTR)(offset) - (section)->PointerToRawData))
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#define RVA_TO_OFFSET(rva, section) \
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((section)->PointerToRawData + ((DWORD_PTR)(rva) - (section)->VirtualAddress))
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#define RVA_TO_SECTION_OFFSET(rva, section) \
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((DWORD_PTR)(rva) - (section)->VirtualAddress)
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#define RVA_TO_PTR(var,section,filedata) \
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((void *)((unsigned char *)(RVA_TO_OFFSET(var,section) + (filedata)->file_base)))
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/* Convert address in executing image to RVA. */
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#define PTR_TO_RVA(ptr) ((DWORD_PTR)(ptr) - (DWORD_PTR) 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_PTR)(offset))
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#define ROUND_UP(p, align) \
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(((DWORD_PTR)(p) + (align)-1) & ~((DWORD_PTR)(align)-1))
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#define ROUND_DOWN(p, align) ((DWORD_PTR)(p) & ~((DWORD_PTR)(align)-1))
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/* The MSVC prep program generates a ._xe file from .exe, where relevant
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function calls etc have been patched to go through thunks (generated
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by prep) that record timing/call information. Because the thunks
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need to make references to functions imported from profile.dll, the
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import table must be expanded; the end result is that all the
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sections following .rdata are relocated to higher RVAs (add a final
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code section is added holding all the thunks). The .reloc section is
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also expanded, so that the thunks themselves are relocatable.
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It is this relocation which kills emacs._xe, because the dumped heap
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pointers aren't relocated, because there is no relocation data for
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either the relevant global/static variables or the heap section
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itself, both of which contain pointers into the heap. [Note that
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static variables which aren't initialized during linking may become
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initialized with heap pointers, or even pointers to other static
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variables, because of dumping.]
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We could potentially generate the relocation data ourselves by making
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two versions of temacs, one with an extra dummy section before
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EMHEAP to offset it, and then compare the dumped executables from
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both. That is a lot of work though, and it doesn't solve the problem
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of dumped pointers to static variables, which also can be relocated.
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A better solution is to pre-process emacs.exe so that the .rdata and
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.reloc sections are moved to the end of the section table, and thus
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prep won't relocate anything else. (Of course, we leave "dead"
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copies of these two sections in place, so that the virtual address of
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everything else is unaffected.) Relocating the .reloc data is
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trivial - we just update the IMAGE_BASE_RELOCATION address in the
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header (the data itself doesn't change). Relocating the import table
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is more complicated though, because the calls to imported functions
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must be patched up. That requires us to selectively apply the base
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relocations when we encounter references to imported functions (or
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variables) in other sections, but at least the base relocations are
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easy to parse. */
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static void
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copy_executable_and_move_sections (file_data *p_infile,
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file_data *p_outfile)
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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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PIMAGE_SECTION_HEADER import_section;
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PIMAGE_SECTION_HEADER reloc_section;
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PIMAGE_DATA_DIRECTORY import_dir;
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PIMAGE_DATA_DIRECTORY reloc_dir;
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DWORD_PTR import_delta_rva;
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DWORD_PTR reloc_delta_rva;
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DWORD_PTR offset;
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int i;
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#define COPY_CHUNK(message, src, size) \
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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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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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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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relocating the .rdata and .reloc section table entries (which might
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force the raw 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 char *) dos_header) +
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dos_header->e_lfanew);
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section = IMAGE_FIRST_SECTION (nt_header);
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import_dir = &nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT];
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import_section = rva_to_section (import_dir->VirtualAddress, nt_header);
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reloc_dir = &nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
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reloc_section = rva_to_section (reloc_dir->VirtualAddress, nt_header);
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if (!reloc_section)
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{
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printf ("No relocation data, cannot prepare for profile prepping.\n");
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exit (1);
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}
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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_PTR) nt_header - (DWORD_PTR) dos_header);
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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_PTR) section - (DWORD_PTR) nt_header);
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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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/* Leave room for extra section table entries; filled in below. */
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dst += 2 * sizeof (*section);
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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;
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i++, section++, dst_section++)
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{
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char msg[100];
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sprintf (msg, "Copying raw data for %s...", section->Name);
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/* "Blank out" the two sections being relocated. */
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if (section == import_section || section == reloc_section)
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{
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dst_section->Name[0] = 'X';
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dst_section->Misc.VirtualSize =
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ROUND_UP (dst_section->Misc.VirtualSize,
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dst_nt_header->OptionalHeader.SectionAlignment);
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dst_section->PointerToRawData = 0;
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dst_section->SizeOfRawData = 0;
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dst_section->Characteristics &= ~IMAGE_SCN_CNT_INITIALIZED_DATA;
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dst_section->Characteristics |= IMAGE_SCN_CNT_UNINITIALIZED_DATA;
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dst_section->Characteristics &= ~IMAGE_SCN_MEM_WRITE;
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continue;
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}
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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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/* 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);
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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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}
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/* Add the extra section entries, copying the raw data we skipped
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earlier. We'll patch up the data itself below. */
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|
if (import_section != NULL)
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{
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dst_nt_header->FileHeader.NumberOfSections++;
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dst_nt_header->OptionalHeader.SizeOfImage +=
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ROUND_UP (import_section->Misc.VirtualSize,
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dst_nt_header->OptionalHeader.SectionAlignment);
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*dst_section = *import_section;
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dst_section->VirtualAddress =
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dst_section[-1].VirtualAddress
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+ ROUND_UP (dst_section[-1].Misc.VirtualSize,
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dst_nt_header->OptionalHeader.SectionAlignment);
|
|
dst_section->PointerToRawData = DST_TO_OFFSET ();
|
|
/* Remember delta applied to import section. */
|
|
import_delta_rva = dst_section->VirtualAddress - import_section->VirtualAddress;
|
|
COPY_CHUNK
|
|
("Relocating import directory",
|
|
OFFSET_TO_PTR (import_section->PointerToRawData, p_infile),
|
|
import_section->SizeOfRawData);
|
|
ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment);
|
|
dst_section++;
|
|
}
|
|
if (reloc_section != NULL)
|
|
{
|
|
dst_nt_header->FileHeader.NumberOfSections++;
|
|
dst_nt_header->OptionalHeader.SizeOfImage +=
|
|
ROUND_UP (reloc_section->Misc.VirtualSize,
|
|
dst_nt_header->OptionalHeader.SectionAlignment);
|
|
*dst_section = *reloc_section;
|
|
dst_section->VirtualAddress =
|
|
dst_section[-1].VirtualAddress
|
|
+ ROUND_UP (dst_section[-1].Misc.VirtualSize,
|
|
dst_nt_header->OptionalHeader.SectionAlignment);
|
|
dst_section->PointerToRawData = DST_TO_OFFSET ();
|
|
/* Remember delta applied to reloc section. */
|
|
reloc_delta_rva = dst_section->VirtualAddress - reloc_section->VirtualAddress;
|
|
COPY_CHUNK
|
|
("Relocating base relocations directory",
|
|
OFFSET_TO_PTR (reloc_section->PointerToRawData, p_infile),
|
|
reloc_section->SizeOfRawData);
|
|
ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment);
|
|
reloc_dir = &dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
|
|
reloc_dir->VirtualAddress += reloc_delta_rva;
|
|
dst_section++;
|
|
}
|
|
|
|
/* 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);
|
|
|
|
/* Final size for new image. */
|
|
p_outfile->size = DST_TO_OFFSET ();
|
|
|
|
/* Now patch up remaining file-relative offsets. */
|
|
printf ("Patching up raw data offsets...\n");
|
|
|
|
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)
|
|
|
|
#define ADJUST_IMPORT_RVA(var) \
|
|
do { \
|
|
if ((var) != 0) \
|
|
*((DWORD_PTR *)&(var)) += import_delta_rva; \
|
|
} 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. Note that the debug
|
|
directory may be in the same section as the import table, so its
|
|
RVA may need to be adjusted too. */
|
|
{
|
|
PIMAGE_DATA_DIRECTORY debug_dir =
|
|
&dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG];
|
|
PIMAGE_DEBUG_DIRECTORY debug_entry;
|
|
|
|
/* Update debug_dir if part of import_section. */
|
|
if (rva_to_section (debug_dir->VirtualAddress, nt_header) == import_section)
|
|
debug_dir->VirtualAddress += import_delta_rva;
|
|
|
|
section = rva_to_section (debug_dir->VirtualAddress, dst_nt_header);
|
|
if (section)
|
|
{
|
|
int size;
|
|
|
|
debug_entry = RVA_TO_PTR (debug_dir->VirtualAddress, section, p_outfile);
|
|
size = debug_dir->Size / sizeof (IMAGE_DEBUG_DIRECTORY);
|
|
|
|
for (i = 0; i < size; i++, debug_entry++)
|
|
{
|
|
/* The debug data itself is normally not part of any
|
|
section, but stored after all the raw section data. So
|
|
let relocate_offset do the work. */
|
|
ADJUST_OFFSET (debug_entry->PointerToRawData);
|
|
ADJUST_IMPORT_RVA (debug_entry->AddressOfRawData);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Update RVAs in import directory entries. */
|
|
{
|
|
PIMAGE_IMPORT_DESCRIPTOR imports;
|
|
PIMAGE_THUNK_DATA import_thunks;
|
|
|
|
import_dir = &dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT];
|
|
import_dir->VirtualAddress += import_delta_rva;
|
|
|
|
section = rva_to_section (import_dir->VirtualAddress, dst_nt_header);
|
|
imports = RVA_TO_PTR (import_dir->VirtualAddress, section, p_outfile);
|
|
|
|
for ( ; imports->Name != 0; imports++)
|
|
{
|
|
ADJUST_IMPORT_RVA (imports->OriginalFirstThunk);
|
|
ADJUST_IMPORT_RVA (imports->FirstThunk);
|
|
ADJUST_IMPORT_RVA (imports->Name);
|
|
|
|
for (import_thunks = RVA_TO_PTR (imports->OriginalFirstThunk, section, p_outfile);
|
|
import_thunks->u1.Function != 0;
|
|
import_thunks++)
|
|
if ((import_thunks->u1.Ordinal >> 31) == 0)
|
|
ADJUST_IMPORT_RVA (import_thunks->u1.Ordinal);
|
|
|
|
for (import_thunks = RVA_TO_PTR (imports->FirstThunk, section, p_outfile);
|
|
import_thunks->u1.Function != 0;
|
|
import_thunks++)
|
|
if ((import_thunks->u1.Ordinal >> 31) == 0)
|
|
ADJUST_IMPORT_RVA (import_thunks->u1.Ordinal);
|
|
}
|
|
|
|
import_dir = &dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IAT];
|
|
import_dir->VirtualAddress += import_delta_rva;
|
|
}
|
|
|
|
/* Fix up references to the import section. */
|
|
printf ("Applying fixups to import references...\n");
|
|
|
|
{
|
|
IMAGE_BASE_RELOCATION *relocs, *block, *start_block, *end_block;
|
|
DWORD_PTR import_start = import_section->VirtualAddress + dst_nt_header->OptionalHeader.ImageBase;
|
|
DWORD_PTR import_end = import_start + import_section->Misc.VirtualSize;
|
|
DWORD_PTR len_import_relocs;
|
|
DWORD_PTR len_remaining_relocs;
|
|
int seen_high = 0;
|
|
WORD * high_word;
|
|
void * holder;
|
|
|
|
reloc_dir = &dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
|
|
reloc_section = rva_to_section (reloc_dir->VirtualAddress, dst_nt_header);
|
|
relocs = RVA_TO_PTR (reloc_dir->VirtualAddress, reloc_section, p_outfile);
|
|
|
|
/* Move the base relocations for the import section, if there are
|
|
any; the profiler needs to be able to patch RVAs in the import
|
|
section itself. */
|
|
for (block = relocs, start_block = 0;
|
|
(DWORD_PTR) block - (DWORD_PTR) relocs < reloc_dir->Size;
|
|
block = (void *)((DWORD_PTR) block + block->SizeOfBlock))
|
|
{
|
|
if (block->VirtualAddress >= import_section->VirtualAddress + import_section->Misc.VirtualSize)
|
|
{
|
|
end_block = block;
|
|
break;
|
|
}
|
|
if (block->VirtualAddress >= import_section->VirtualAddress)
|
|
{
|
|
if (start_block == 0)
|
|
start_block = block;
|
|
block->VirtualAddress += import_delta_rva;
|
|
}
|
|
}
|
|
if (start_block)
|
|
{
|
|
len_import_relocs = (DWORD_PTR) end_block - (DWORD_PTR) start_block;
|
|
len_remaining_relocs = (DWORD_PTR) relocs + reloc_dir->Size - (DWORD_PTR) end_block;
|
|
holder = malloc (len_import_relocs);
|
|
if (holder == 0)
|
|
abort ();
|
|
memcpy (holder, start_block, len_import_relocs);
|
|
memcpy (start_block, end_block, len_remaining_relocs);
|
|
memcpy ((char *) start_block + len_remaining_relocs, holder, len_import_relocs);
|
|
free (holder);
|
|
}
|
|
|
|
/* Walk up the list of base relocations, checking for references
|
|
to the old import section location, and patching them to
|
|
reference the new location. */
|
|
for (block = relocs;
|
|
(DWORD_PTR) block - (DWORD_PTR) relocs < reloc_dir->Size;
|
|
block = (void *)((DWORD_PTR) block + block->SizeOfBlock))
|
|
{
|
|
DWORD_PTR page_rva = block->VirtualAddress;
|
|
DWORD_PTR page_offset;
|
|
union {
|
|
WORD word;
|
|
DWORD_PTR dword;
|
|
} * ploc;
|
|
WORD *fixup;
|
|
|
|
section = rva_to_section (page_rva, dst_nt_header);
|
|
/* Don't apply fixups to the blanked sections. */
|
|
if (section->Name[0] == 'X')
|
|
continue;
|
|
|
|
for (fixup = (WORD *) &block[1];
|
|
(DWORD_PTR) fixup - (DWORD_PTR) block < block->SizeOfBlock;
|
|
fixup++)
|
|
{
|
|
page_offset = (*fixup) & 0xfff;
|
|
ploc = RVA_TO_PTR (page_rva + page_offset, section, p_outfile);
|
|
|
|
/* Unless our assumption is wrong, all low word fixups
|
|
should immediately follow a high fixup. */
|
|
if (seen_high && ((*fixup) >> 12) != IMAGE_REL_BASED_LOW)
|
|
abort ();
|
|
|
|
switch ((*fixup) >> 12)
|
|
{
|
|
case IMAGE_REL_BASED_ABSOLUTE:
|
|
break;
|
|
case IMAGE_REL_BASED_HIGH:
|
|
/* We must assume that high and low fixups occur in
|
|
pairs, specifically a low fixup immediately follows a
|
|
high fixup (normally separated by two bytes). We
|
|
have to process the two fixups together, to find out
|
|
the full pointer value and decide whether to apply
|
|
the fixup. */
|
|
seen_high = 1;
|
|
high_word = &ploc->word;
|
|
break;
|
|
case IMAGE_REL_BASED_LOW:
|
|
offset = (*high_word << 16) + ploc->word;
|
|
if (offset >= import_start && offset < import_end)
|
|
{
|
|
(*high_word) += import_delta_rva >> 16;
|
|
ploc->dword += import_delta_rva & 0xffff;
|
|
}
|
|
seen_high = 0;
|
|
break;
|
|
case IMAGE_REL_BASED_HIGHLOW:
|
|
/* Docs imply two words in big-endian order, so perhaps
|
|
this is only used on big-endian platforms, in which
|
|
case the obvious code will work. */
|
|
if (ploc->dword >= import_start && ploc->dword < import_end)
|
|
ploc->dword += import_delta_rva;
|
|
break;
|
|
case IMAGE_REL_BASED_HIGHADJ:
|
|
/* Docs don't say, but I guess this is the equivalent
|
|
for little-endian platforms. */
|
|
if (ploc->dword >= import_start && ploc->dword < import_end)
|
|
ploc->dword += import_delta_rva;
|
|
break;
|
|
case IMAGE_REL_BASED_MIPS_JMPADDR:
|
|
/* Don't know how to handle this; MIPS support has been
|
|
dropped from NT4 anyway. */
|
|
abort ();
|
|
break;
|
|
#ifdef IMAGE_REL_BASED_SECTION
|
|
case IMAGE_REL_BASED_SECTION:
|
|
case IMAGE_REL_BASED_REL32:
|
|
/* Docs don't say what these values mean. */
|
|
#endif
|
|
default:
|
|
abort ();
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
PIMAGE_DOS_HEADER dos_header;
|
|
PIMAGE_NT_HEADERS nt_header;
|
|
file_data in_file, out_file;
|
|
char out_filename[MAX_PATH], in_filename[MAX_PATH];
|
|
|
|
strcpy (in_filename, argv[1]);
|
|
strcpy (out_filename, argv[2]);
|
|
|
|
printf ("Preparing %s for profile prepping\n", out_filename);
|
|
|
|
/* Open the original (dumped) executable file for reference. */
|
|
if (!open_input_file (&in_file, in_filename))
|
|
{
|
|
printf ("Failed to open %s (%d)...bailing.\n",
|
|
in_filename, GetLastError ());
|
|
exit (1);
|
|
}
|
|
|
|
/* Create a new image that can be prepped; we don't expect the size to
|
|
change because we are only adding two new section table entries,
|
|
which should fit in the alignment slop. */
|
|
if (!open_output_file (&out_file, out_filename, in_file.size))
|
|
{
|
|
printf ("Failed to open %s (%d)...bailing.\n",
|
|
out_filename, GetLastError ());
|
|
exit (1);
|
|
}
|
|
|
|
copy_executable_and_move_sections (&in_file, &out_file);
|
|
|
|
/* 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 (&out_file);
|
|
close_file_data (&in_file);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* eof */
|