+++ /dev/null
-/* Pre-process emacs.exe for profiling by MSVC.
- Copyright (C) 1999, 2001-2023 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 <https://www.gnu.org/licenses/>.
-
-
- Andrew Innes <andrewi@harlequin.co.uk> 16-Jan-1999
- based on code from addsection.c
-*/
-
-#define DEFER_MS_W32_H
-#include <config.h>
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <fcntl.h>
-#include <time.h>
-#if defined(__GNUC__) && !defined(MINGW_W64)
-#define _ANONYMOUS_UNION
-#define _ANONYMOUS_STRUCT
-#endif
-#include <windows.h>
-
-/* Include relevant definitions from IMAGEHLP.H, which can be found
- in \\win32sdk\mstools\samples\image\include\imagehlp.h. */
-
-PIMAGE_NT_HEADERS (__stdcall * pfnCheckSumMappedFile) (LPVOID BaseAddress,
- DWORD_PTR FileLength,
- PDWORD_PTR HeaderSum,
- PDWORD_PTR CheckSum);
-
-#undef min
-#undef max
-#define min(x, y) (((x) < (y)) ? (x) : (y))
-#define max(x, y) (((x) > (y)) ? (x) : (y))
-
-
-/* File handling. */
-
-typedef struct file_data {
- const char *name;
- unsigned long size;
- HANDLE file;
- HANDLE file_mapping;
- unsigned char *file_base;
-} file_data;
-
-int
-open_input_file (file_data *p_file, const char *filename)
-{
- HANDLE file;
- HANDLE file_mapping;
- void *file_base;
- unsigned long size, upper_size;
-
- file = CreateFile (filename, GENERIC_READ, FILE_SHARE_READ, NULL,
- OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
- if (file == INVALID_HANDLE_VALUE)
- return FALSE;
-
- size = GetFileSize (file, &upper_size);
- file_mapping = CreateFileMapping (file, NULL, PAGE_READONLY,
- 0, size, NULL);
- if (!file_mapping)
- return FALSE;
-
- file_base = MapViewOfFile (file_mapping, FILE_MAP_READ, 0, 0, size);
- if (file_base == 0)
- return FALSE;
-
- p_file->name = filename;
- p_file->size = size;
- p_file->file = file;
- p_file->file_mapping = file_mapping;
- p_file->file_base = file_base;
-
- return TRUE;
-}
-
-int
-open_output_file (file_data *p_file, const char *filename, unsigned long size)
-{
- HANDLE file;
- HANDLE file_mapping;
- void *file_base;
-
- file = CreateFile (filename, GENERIC_READ | GENERIC_WRITE, 0, NULL,
- CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
- if (file == INVALID_HANDLE_VALUE)
- return FALSE;
-
- file_mapping = CreateFileMapping (file, NULL, PAGE_READWRITE,
- 0, size, NULL);
- if (!file_mapping)
- return FALSE;
-
- file_base = MapViewOfFile (file_mapping, FILE_MAP_WRITE, 0, 0, size);
- if (file_base == 0)
- return FALSE;
-
- p_file->name = filename;
- p_file->size = size;
- p_file->file = file;
- p_file->file_mapping = file_mapping;
- p_file->file_base = file_base;
-
- return TRUE;
-}
-
-int
-open_inout_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 | GENERIC_WRITE, 0, 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_READWRITE,
- 0, size, NULL);
- if (!file_mapping)
- return FALSE;
-
- file_base = MapViewOfFile (file_mapping, FILE_MAP_WRITE, 0, 0, size);
- if (file_base == 0)
- return FALSE;
-
- p_file->name = filename;
- p_file->size = size;
- p_file->file = file;
- p_file->file_mapping = file_mapping;
- p_file->file_base = file_base;
-
- return TRUE;
-}
-
-/* Close the system structures associated with the given file. */
-void
-close_file_data (file_data *p_file)
-{
- UnmapViewOfFile (p_file->file_base);
- CloseHandle (p_file->file_mapping);
- /* For the case of output files, set final size. */
- SetFilePointer (p_file->file, p_file->size, NULL, FILE_BEGIN);
- SetEndOfFile (p_file->file);
- CloseHandle (p_file->file);
-}
-
-
-/* Routines to manipulate NT executable file sections. */
-
-unsigned long
-get_unrounded_section_size (PIMAGE_SECTION_HEADER p_section)
-{
- /* The true section size, before rounding, for an initialized data or
- code section. (Supposedly some linkers swap the meaning of these
- two values.) */
- return min (p_section->SizeOfRawData,
- p_section->Misc.VirtualSize);
-}
-
-/* Return pointer to section header for named section. */
-IMAGE_SECTION_HEADER *
-find_section (const char *name, IMAGE_NT_HEADERS *nt_header)
-{
- PIMAGE_SECTION_HEADER section;
- int i;
-
- section = IMAGE_FIRST_SECTION (nt_header);
-
- for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++)
- {
- if (strcmp (section->Name, name) == 0)
- return section;
- section++;
- }
- return NULL;
-}
-
-/* Return pointer to section header for section containing the given
- relative virtual address. */
-IMAGE_SECTION_HEADER *
-rva_to_section (DWORD_PTR rva, IMAGE_NT_HEADERS * nt_header)
-{
- PIMAGE_SECTION_HEADER section;
- int i;
-
- section = IMAGE_FIRST_SECTION (nt_header);
-
- for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++)
- {
- /* Some linkers (eg. the NT SDK linker I believe) swapped the
- meaning of these two values - or rather, they ignored
- VirtualSize entirely and always set it to zero. This affects
- some very old exes (eg. gzip dated Dec 1993). Since
- w32_executable_type relies on this function to work reliably,
- we need to cope with this. */
- DWORD_PTR real_size = max (section->SizeOfRawData,
- section->Misc.VirtualSize);
- if (rva >= section->VirtualAddress
- && rva < section->VirtualAddress + real_size)
- return section;
- section++;
- }
- return NULL;
-}
-
-/* Return pointer to section header for section containing the given
- offset in its raw data area. */
-IMAGE_SECTION_HEADER *
-offset_to_section (DWORD_PTR offset, IMAGE_NT_HEADERS * nt_header)
-{
- PIMAGE_SECTION_HEADER section;
- int i;
-
- section = IMAGE_FIRST_SECTION (nt_header);
-
- for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++)
- {
- if (offset >= section->PointerToRawData
- && offset < section->PointerToRawData + section->SizeOfRawData)
- return section;
- section++;
- }
- return NULL;
-}
-
-/* Return offset to an object in dst, given offset in src. We assume
- there is at least one section in both src and dst images, and that
- the some sections may have been added to dst (after sections in src). */
-static DWORD_PTR
-relocate_offset (DWORD_PTR offset,
- IMAGE_NT_HEADERS * src_nt_header,
- IMAGE_NT_HEADERS * dst_nt_header)
-{
- PIMAGE_SECTION_HEADER src_section = IMAGE_FIRST_SECTION (src_nt_header);
- PIMAGE_SECTION_HEADER dst_section = IMAGE_FIRST_SECTION (dst_nt_header);
- int i = 0;
-
- while (offset >= src_section->PointerToRawData)
- {
- if (offset < src_section->PointerToRawData + src_section->SizeOfRawData)
- break;
- i++;
- if (i == src_nt_header->FileHeader.NumberOfSections)
- {
- /* Handle offsets after the last section. */
- dst_section = IMAGE_FIRST_SECTION (dst_nt_header);
- dst_section += dst_nt_header->FileHeader.NumberOfSections - 1;
- while (dst_section->PointerToRawData == 0)
- dst_section--;
- while (src_section->PointerToRawData == 0)
- src_section--;
- return offset
- + (dst_section->PointerToRawData + dst_section->SizeOfRawData)
- - (src_section->PointerToRawData + src_section->SizeOfRawData);
- }
- src_section++;
- dst_section++;
- }
- return offset +
- (dst_section->PointerToRawData - src_section->PointerToRawData);
-}
-
-#define OFFSET_TO_RVA(offset, section) \
- ((section)->VirtualAddress + ((DWORD_PTR)(offset) - (section)->PointerToRawData))
-
-#define RVA_TO_OFFSET(rva, section) \
- ((section)->PointerToRawData + ((DWORD_PTR)(rva) - (section)->VirtualAddress))
-
-#define RVA_TO_SECTION_OFFSET(rva, section) \
- ((DWORD_PTR)(rva) - (section)->VirtualAddress)
-
-#define RVA_TO_PTR(var,section,filedata) \
- ((void *)((unsigned char *)(RVA_TO_OFFSET(var,section) + (filedata)->file_base)))
-
-/* Convert address in executing image to RVA. */
-#define PTR_TO_RVA(ptr) ((DWORD_PTR)(ptr) - (DWORD_PTR) GetModuleHandle (NULL))
-
-#define PTR_TO_OFFSET(ptr, pfile_data) \
- ((unsigned const char *)(ptr) - (pfile_data)->file_base)
-
-#define OFFSET_TO_PTR(offset, pfile_data) \
- ((pfile_data)->file_base + (DWORD_PTR)(offset))
-
-#define ROUND_UP(p, align) \
- (((DWORD_PTR)(p) + (align)-1) & ~((DWORD_PTR)(align)-1))
-#define ROUND_DOWN(p, align) ((DWORD_PTR)(p) & ~((DWORD_PTR)(align)-1))
-
-
-/* The MSVC prep program generates a ._xe file from .exe, where relevant
- function calls etc have been patched to go through thunks (generated
- by prep) that record timing/call information. Because the thunks
- need to make references to functions imported from profile.dll, the
- import table must be expanded; the end result is that all the
- sections following .rdata are relocated to higher RVAs (add a final
- code section is added holding all the thunks). The .reloc section is
- also expanded, so that the thunks themselves are relocatable.
-
- It is this relocation which kills emacs._xe, because the dumped heap
- pointers aren't relocated, because there is no relocation data for
- either the relevant global/static variables or the heap section
- itself, both of which contain pointers into the heap. [Note that
- static variables which aren't initialized during linking may become
- initialized with heap pointers, or even pointers to other static
- variables, because of dumping.]
-
- We could potentially generate the relocation data ourselves by making
- two versions of temacs, one with an extra dummy section before
- EMHEAP to offset it, and then compare the dumped executables from
- both. That is a lot of work though, and it doesn't solve the problem
- of dumped pointers to static variables, which also can be relocated.
-
- A better solution is to pre-process emacs.exe so that the .rdata and
- .reloc sections are moved to the end of the section table, and thus
- prep won't relocate anything else. (Of course, we leave "dead"
- copies of these two sections in place, so that the virtual address of
- everything else is unaffected.) Relocating the .reloc data is
- trivial - we just update the IMAGE_BASE_RELOCATION address in the
- header (the data itself doesn't change). Relocating the import table
- is more complicated though, because the calls to imported functions
- must be patched up. That requires us to selectively apply the base
- relocations when we encounter references to imported functions (or
- variables) in other sections, but at least the base relocations are
- easy to parse. */
-
-static void
-copy_executable_and_move_sections (file_data *p_infile,
- file_data *p_outfile)
-{
- 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;
- PIMAGE_SECTION_HEADER import_section;
- PIMAGE_SECTION_HEADER reloc_section;
- PIMAGE_DATA_DIRECTORY import_dir;
- PIMAGE_DATA_DIRECTORY reloc_dir;
- DWORD_PTR import_delta_rva;
- DWORD_PTR reloc_delta_rva;
- DWORD_PTR offset;
- int i;
-
-#define COPY_CHUNK(message, src, size) \
- do { \
- unsigned const char *s = (void *)(src); \
- unsigned long count = (size); \
- 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
- relocating the .rdata and .reloc section table entries (which might
- force the raw section data to be relocated).
-
- Note that dst is updated implicitly by each COPY_CHUNK. */
-
- dos_header = (PIMAGE_DOS_HEADER) p_infile->file_base;
- nt_header = (PIMAGE_NT_HEADERS) (((unsigned char *) dos_header) +
- dos_header->e_lfanew);
- section = IMAGE_FIRST_SECTION (nt_header);
-
- import_dir = &nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT];
- import_section = rva_to_section (import_dir->VirtualAddress, nt_header);
-
- reloc_dir = &nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC];
- reloc_section = rva_to_section (reloc_dir->VirtualAddress, nt_header);
- if (!reloc_section)
- {
- printf ("No relocation data, cannot prepare for profile prepping.\n");
- exit (1);
- }
-
- dst = (unsigned char *) p_outfile->file_base;
-
- COPY_CHUNK ("Copying DOS header...", dos_header,
- (DWORD_PTR) nt_header - (DWORD_PTR) dos_header);
- dst_nt_header = (PIMAGE_NT_HEADERS) dst;
- COPY_CHUNK ("Copying NT header...", nt_header,
- (DWORD_PTR) section - (DWORD_PTR) nt_header);
- dst_section = (PIMAGE_SECTION_HEADER) dst;
- COPY_CHUNK ("Copying section table...", section,
- nt_header->FileHeader.NumberOfSections * sizeof (*section));
-
- /* Leave room for extra section table entries; filled in below. */
- dst += 2 * sizeof (*section);
-
- /* 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++, section++, dst_section++)
- {
- char msg[100];
- sprintf (msg, "Copying raw data for %s...", section->Name);
-
- /* "Blank out" the two sections being relocated. */
- if (section == import_section || section == reloc_section)
- {
- dst_section->Name[0] = 'X';
- dst_section->Misc.VirtualSize =
- ROUND_UP (dst_section->Misc.VirtualSize,
- dst_nt_header->OptionalHeader.SectionAlignment);
- dst_section->PointerToRawData = 0;
- dst_section->SizeOfRawData = 0;
- dst_section->Characteristics &= ~IMAGE_SCN_CNT_INITIALIZED_DATA;
- dst_section->Characteristics |= IMAGE_SCN_CNT_UNINITIALIZED_DATA;
- dst_section->Characteristics &= ~IMAGE_SCN_MEM_WRITE;
- continue;
- }
-
- /* 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 ();
-
- /* Copy the original raw data. */
- COPY_CHUNK
- (msg, OFFSET_TO_PTR (section->PointerToRawData, p_infile),
- section->SizeOfRawData);
-
- /* 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);
- }
-
- /* Add the extra section entries, copying the raw data we skipped
- earlier. We'll patch up the data itself below. */
- if (import_section != NULL)
- {
- dst_nt_header->FileHeader.NumberOfSections++;
- dst_nt_header->OptionalHeader.SizeOfImage +=
- ROUND_UP (import_section->Misc.VirtualSize,
- dst_nt_header->OptionalHeader.SectionAlignment);
- *dst_section = *import_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 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 */
projects / emacs.git / commitdiff