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0597ab06 | 1 | /* Pre-process emacs.exe for profiling by MSVC. |
acaf905b | 2 | Copyright (C) 1999, 2001-2012 Free Software Foundation, Inc. |
95382f42 AI |
3 | |
4 | This file is part of GNU Emacs. | |
5 | ||
eef0be9e | 6 | GNU Emacs is free software: you can redistribute it and/or modify |
95382f42 | 7 | it under the terms of the GNU General Public License as published by |
eef0be9e GM |
8 | the Free Software Foundation, either version 3 of the License, or |
9 | (at your option) any later version. | |
95382f42 AI |
10 | |
11 | GNU Emacs is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
eef0be9e GM |
17 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. |
18 | ||
95382f42 AI |
19 | |
20 | Andrew Innes <andrewi@harlequin.co.uk> 16-Jan-1999 | |
21 | based on code from addsection.c | |
22 | */ | |
23 | ||
24 | #include <stdlib.h> | |
25 | #include <stdio.h> | |
26 | #include <fcntl.h> | |
27 | #include <time.h> | |
a1375c9f AI |
28 | #ifdef __GNUC__ |
29 | #define _ANONYMOUS_UNION | |
30 | #define _ANONYMOUS_STRUCT | |
31 | #endif | |
95382f42 AI |
32 | #include <windows.h> |
33 | ||
34 | /* Include relevant definitions from IMAGEHLP.H, which can be found | |
35 | in \\win32sdk\mstools\samples\image\include\imagehlp.h. */ | |
36 | ||
37 | PIMAGE_NT_HEADERS | |
38 | (__stdcall * pfnCheckSumMappedFile) (LPVOID BaseAddress, | |
0597ab06 JB |
39 | DWORD FileLength, |
40 | LPDWORD HeaderSum, | |
41 | LPDWORD CheckSum); | |
95382f42 AI |
42 | |
43 | #undef min | |
44 | #undef max | |
45 | #define min(x, y) (((x) < (y)) ? (x) : (y)) | |
46 | #define max(x, y) (((x) > (y)) ? (x) : (y)) | |
47 | ||
48 | ||
49 | /* File handling. */ | |
50 | ||
51 | typedef struct file_data { | |
0597ab06 JB |
52 | const char *name; |
53 | unsigned long size; | |
54 | HANDLE file; | |
55 | HANDLE file_mapping; | |
56 | unsigned char *file_base; | |
95382f42 AI |
57 | } file_data; |
58 | ||
59 | int | |
0597ab06 | 60 | open_input_file (file_data *p_file, const char *filename) |
95382f42 AI |
61 | { |
62 | HANDLE file; | |
63 | HANDLE file_mapping; | |
64 | void *file_base; | |
65 | unsigned long size, upper_size; | |
66 | ||
67 | file = CreateFile (filename, GENERIC_READ, FILE_SHARE_READ, NULL, | |
68 | OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); | |
177c0ea7 | 69 | if (file == INVALID_HANDLE_VALUE) |
95382f42 AI |
70 | return FALSE; |
71 | ||
72 | size = GetFileSize (file, &upper_size); | |
177c0ea7 | 73 | file_mapping = CreateFileMapping (file, NULL, PAGE_READONLY, |
95382f42 | 74 | 0, size, NULL); |
177c0ea7 | 75 | if (!file_mapping) |
95382f42 AI |
76 | return FALSE; |
77 | ||
78 | file_base = MapViewOfFile (file_mapping, FILE_MAP_READ, 0, 0, size); | |
177c0ea7 | 79 | if (file_base == 0) |
95382f42 AI |
80 | return FALSE; |
81 | ||
82 | p_file->name = filename; | |
83 | p_file->size = size; | |
84 | p_file->file = file; | |
85 | p_file->file_mapping = file_mapping; | |
86 | p_file->file_base = file_base; | |
87 | ||
88 | return TRUE; | |
89 | } | |
90 | ||
91 | int | |
0597ab06 | 92 | open_output_file (file_data *p_file, const char *filename, unsigned long size) |
95382f42 AI |
93 | { |
94 | HANDLE file; | |
95 | HANDLE file_mapping; | |
96 | void *file_base; | |
97 | ||
98 | file = CreateFile (filename, GENERIC_READ | GENERIC_WRITE, 0, NULL, | |
99 | CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0); | |
177c0ea7 | 100 | if (file == INVALID_HANDLE_VALUE) |
95382f42 AI |
101 | return FALSE; |
102 | ||
177c0ea7 | 103 | file_mapping = CreateFileMapping (file, NULL, PAGE_READWRITE, |
95382f42 | 104 | 0, size, NULL); |
177c0ea7 | 105 | if (!file_mapping) |
95382f42 | 106 | return FALSE; |
177c0ea7 | 107 | |
95382f42 | 108 | file_base = MapViewOfFile (file_mapping, FILE_MAP_WRITE, 0, 0, size); |
177c0ea7 | 109 | if (file_base == 0) |
95382f42 | 110 | return FALSE; |
177c0ea7 | 111 | |
95382f42 AI |
112 | p_file->name = filename; |
113 | p_file->size = size; | |
114 | p_file->file = file; | |
115 | p_file->file_mapping = file_mapping; | |
116 | p_file->file_base = file_base; | |
117 | ||
118 | return TRUE; | |
119 | } | |
120 | ||
121 | int | |
0597ab06 | 122 | open_inout_file (file_data *p_file, const char *filename) |
95382f42 AI |
123 | { |
124 | HANDLE file; | |
125 | HANDLE file_mapping; | |
126 | void *file_base; | |
127 | unsigned long size, upper_size; | |
128 | ||
129 | file = CreateFile (filename, GENERIC_READ | GENERIC_WRITE, 0, NULL, | |
130 | OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); | |
177c0ea7 | 131 | if (file == INVALID_HANDLE_VALUE) |
95382f42 AI |
132 | return FALSE; |
133 | ||
134 | size = GetFileSize (file, &upper_size); | |
135 | file_mapping = CreateFileMapping (file, NULL, PAGE_READWRITE, | |
136 | 0, size, NULL); | |
177c0ea7 | 137 | if (!file_mapping) |
95382f42 AI |
138 | return FALSE; |
139 | ||
140 | file_base = MapViewOfFile (file_mapping, FILE_MAP_WRITE, 0, 0, size); | |
177c0ea7 | 141 | if (file_base == 0) |
95382f42 AI |
142 | return FALSE; |
143 | ||
144 | p_file->name = filename; | |
145 | p_file->size = size; | |
146 | p_file->file = file; | |
147 | p_file->file_mapping = file_mapping; | |
148 | p_file->file_base = file_base; | |
149 | ||
150 | return TRUE; | |
151 | } | |
152 | ||
153 | /* Close the system structures associated with the given file. */ | |
154 | void | |
155 | close_file_data (file_data *p_file) | |
156 | { | |
157 | UnmapViewOfFile (p_file->file_base); | |
158 | CloseHandle (p_file->file_mapping); | |
159 | /* For the case of output files, set final size. */ | |
160 | SetFilePointer (p_file->file, p_file->size, NULL, FILE_BEGIN); | |
161 | SetEndOfFile (p_file->file); | |
162 | CloseHandle (p_file->file); | |
163 | } | |
164 | ||
165 | ||
166 | /* Routines to manipulate NT executable file sections. */ | |
167 | ||
168 | unsigned long | |
169 | get_unrounded_section_size (PIMAGE_SECTION_HEADER p_section) | |
170 | { | |
171 | /* The true section size, before rounding, for an initialized data or | |
172 | code section. (Supposedly some linkers swap the meaning of these | |
173 | two values.) */ | |
174 | return min (p_section->SizeOfRawData, | |
175 | p_section->Misc.VirtualSize); | |
176 | } | |
177 | ||
178 | /* Return pointer to section header for named section. */ | |
179 | IMAGE_SECTION_HEADER * | |
0597ab06 | 180 | find_section (const char *name, IMAGE_NT_HEADERS *nt_header) |
95382f42 AI |
181 | { |
182 | PIMAGE_SECTION_HEADER section; | |
183 | int i; | |
184 | ||
185 | section = IMAGE_FIRST_SECTION (nt_header); | |
186 | ||
187 | for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++) | |
188 | { | |
189 | if (strcmp (section->Name, name) == 0) | |
190 | return section; | |
191 | section++; | |
192 | } | |
193 | return NULL; | |
194 | } | |
195 | ||
196 | /* Return pointer to section header for section containing the given | |
197 | relative virtual address. */ | |
198 | IMAGE_SECTION_HEADER * | |
199 | rva_to_section (DWORD rva, IMAGE_NT_HEADERS * nt_header) | |
200 | { | |
201 | PIMAGE_SECTION_HEADER section; | |
202 | int i; | |
203 | ||
204 | section = IMAGE_FIRST_SECTION (nt_header); | |
205 | ||
206 | for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++) | |
207 | { | |
208 | /* Some linkers (eg. the NT SDK linker I believe) swapped the | |
209 | meaning of these two values - or rather, they ignored | |
210 | VirtualSize entirely and always set it to zero. This affects | |
211 | some very old exes (eg. gzip dated Dec 1993). Since | |
212 | w32_executable_type relies on this function to work reliably, | |
213 | we need to cope with this. */ | |
214 | DWORD real_size = max (section->SizeOfRawData, | |
215 | section->Misc.VirtualSize); | |
216 | if (rva >= section->VirtualAddress | |
217 | && rva < section->VirtualAddress + real_size) | |
218 | return section; | |
219 | section++; | |
220 | } | |
221 | return NULL; | |
222 | } | |
223 | ||
224 | /* Return pointer to section header for section containing the given | |
225 | offset in its raw data area. */ | |
226 | IMAGE_SECTION_HEADER * | |
227 | offset_to_section (DWORD offset, IMAGE_NT_HEADERS * nt_header) | |
228 | { | |
229 | PIMAGE_SECTION_HEADER section; | |
230 | int i; | |
231 | ||
232 | section = IMAGE_FIRST_SECTION (nt_header); | |
233 | ||
234 | for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++) | |
235 | { | |
236 | if (offset >= section->PointerToRawData | |
237 | && offset < section->PointerToRawData + section->SizeOfRawData) | |
238 | return section; | |
239 | section++; | |
240 | } | |
241 | return NULL; | |
242 | } | |
243 | ||
244 | /* Return offset to an object in dst, given offset in src. We assume | |
245 | there is at least one section in both src and dst images, and that | |
246 | the some sections may have been added to dst (after sections in src). */ | |
247 | static DWORD | |
248 | relocate_offset (DWORD offset, | |
249 | IMAGE_NT_HEADERS * src_nt_header, | |
250 | IMAGE_NT_HEADERS * dst_nt_header) | |
251 | { | |
252 | PIMAGE_SECTION_HEADER src_section = IMAGE_FIRST_SECTION (src_nt_header); | |
253 | PIMAGE_SECTION_HEADER dst_section = IMAGE_FIRST_SECTION (dst_nt_header); | |
254 | int i = 0; | |
255 | ||
256 | while (offset >= src_section->PointerToRawData) | |
257 | { | |
258 | if (offset < src_section->PointerToRawData + src_section->SizeOfRawData) | |
259 | break; | |
260 | i++; | |
261 | if (i == src_nt_header->FileHeader.NumberOfSections) | |
262 | { | |
263 | /* Handle offsets after the last section. */ | |
264 | dst_section = IMAGE_FIRST_SECTION (dst_nt_header); | |
265 | dst_section += dst_nt_header->FileHeader.NumberOfSections - 1; | |
266 | while (dst_section->PointerToRawData == 0) | |
267 | dst_section--; | |
268 | while (src_section->PointerToRawData == 0) | |
269 | src_section--; | |
270 | return offset | |
271 | + (dst_section->PointerToRawData + dst_section->SizeOfRawData) | |
272 | - (src_section->PointerToRawData + src_section->SizeOfRawData); | |
273 | } | |
274 | src_section++; | |
275 | dst_section++; | |
276 | } | |
277 | return offset + | |
278 | (dst_section->PointerToRawData - src_section->PointerToRawData); | |
279 | } | |
280 | ||
281 | #define OFFSET_TO_RVA(offset, section) \ | |
282 | (section->VirtualAddress + ((DWORD)(offset) - section->PointerToRawData)) | |
283 | ||
284 | #define RVA_TO_OFFSET(rva, section) \ | |
285 | (section->PointerToRawData + ((DWORD)(rva) - section->VirtualAddress)) | |
286 | ||
287 | #define RVA_TO_SECTION_OFFSET(rva, section) \ | |
288 | ((DWORD)(rva) - section->VirtualAddress) | |
289 | ||
290 | #define RVA_TO_PTR(var,section,filedata) \ | |
291 | ((void *)(RVA_TO_OFFSET(var,section) + (filedata)->file_base)) | |
292 | ||
293 | /* Convert address in executing image to RVA. */ | |
294 | #define PTR_TO_RVA(ptr) ((DWORD)(ptr) - (DWORD) GetModuleHandle (NULL)) | |
295 | ||
296 | #define PTR_TO_OFFSET(ptr, pfile_data) \ | |
0597ab06 | 297 | ((unsigned const char *)(ptr) - (pfile_data)->file_base) |
95382f42 AI |
298 | |
299 | #define OFFSET_TO_PTR(offset, pfile_data) \ | |
300 | ((pfile_data)->file_base + (DWORD)(offset)) | |
301 | ||
302 | #define ROUND_UP(p, align) (((DWORD)(p) + (align)-1) & ~((align)-1)) | |
303 | #define ROUND_DOWN(p, align) ((DWORD)(p) & ~((align)-1)) | |
304 | ||
305 | ||
306 | /* The MSVC prep program generates a ._xe file from .exe, where relevant | |
307 | function calls etc have been patched to go through thunks (generated | |
308 | by prep) that record timing/call information. Because the thunks | |
309 | need to make references to functions imported from profile.dll, the | |
310 | import table must be expanded; the end result is that all the | |
311 | sections following .rdata are relocated to higher RVAs (add a final | |
312 | code section is added holding all the thunks). The .reloc section is | |
313 | also expanded, so that the thunks themselves are relocatable. | |
314 | ||
315 | It is this relocation which kills emacs._xe, because the dumped heap | |
316 | pointers aren't relocated, because there is no relocation data for | |
317 | either the relevant global/static variables or the heap section | |
318 | itself, both of which contain pointers into the heap. [Note that | |
319 | static variables which aren't initialized during linking may become | |
320 | initialized with heap pointers, or even pointers to other static | |
321 | variables, because of dumping.] | |
322 | ||
323 | We could potentially generate the relocation data ourselves by making | |
c7015153 | 324 | two versions of temacs, one with an extra dummy section before |
95382f42 AI |
325 | EMHEAP to offset it, and then compare the dumped executables from |
326 | both. That is a lot of work though, and it doesn't solve the problem | |
327 | of dumped pointers to static variables, which also can be relocated. | |
328 | ||
329 | A better solution is to pre-process emacs.exe so that the .rdata and | |
330 | .reloc sections are moved to the end of the section table, and thus | |
331 | prep won't relocate anything else. (Of course, we leave "dead" | |
332 | copies of these two sections in place, so that the virtual address of | |
333 | everything else is unaffected.) Relocating the .reloc data is | |
334 | trivial - we just update the IMAGE_BASE_RELOCATION address in the | |
335 | header (the data itself doesn't change). Relocating the import table | |
336 | is more complicated though, because the calls to imported functions | |
337 | must be patched up. That requires us to selectively apply the base | |
338 | relocations when we encounter references to imported functions (or | |
339 | variables) in other sections, but at least the base relocations are | |
340 | easy to parse. */ | |
341 | ||
342 | static void | |
177c0ea7 | 343 | copy_executable_and_move_sections (file_data *p_infile, |
95382f42 AI |
344 | file_data *p_outfile) |
345 | { | |
346 | unsigned char *dst; | |
347 | PIMAGE_DOS_HEADER dos_header; | |
348 | PIMAGE_NT_HEADERS nt_header; | |
349 | PIMAGE_NT_HEADERS dst_nt_header; | |
350 | PIMAGE_SECTION_HEADER section; | |
351 | PIMAGE_SECTION_HEADER dst_section; | |
352 | PIMAGE_SECTION_HEADER import_section; | |
353 | PIMAGE_SECTION_HEADER reloc_section; | |
354 | PIMAGE_DATA_DIRECTORY import_dir; | |
355 | PIMAGE_DATA_DIRECTORY reloc_dir; | |
356 | DWORD import_delta_rva; | |
357 | DWORD reloc_delta_rva; | |
358 | DWORD offset; | |
359 | int i; | |
360 | ||
361 | #define COPY_CHUNK(message, src, size) \ | |
362 | do { \ | |
0597ab06 | 363 | unsigned const char *s = (void *)(src); \ |
95382f42 AI |
364 | unsigned long count = (size); \ |
365 | printf ("%s\n", (message)); \ | |
366 | printf ("\t0x%08x Offset in input file.\n", s - p_infile->file_base); \ | |
367 | printf ("\t0x%08x Offset in output file.\n", dst - p_outfile->file_base); \ | |
368 | printf ("\t0x%08x Size in bytes.\n", count); \ | |
369 | memcpy (dst, s, count); \ | |
370 | dst += count; \ | |
371 | } while (0) | |
372 | ||
373 | #define DST_TO_OFFSET() PTR_TO_OFFSET (dst, p_outfile) | |
374 | #define ROUND_UP_DST_AND_ZERO(align) \ | |
375 | do { \ | |
376 | unsigned char *newdst = p_outfile->file_base \ | |
377 | + ROUND_UP (DST_TO_OFFSET (), (align)); \ | |
378 | /* Zero the alignment slop; it may actually initialize real data. */ \ | |
379 | memset (dst, 0, newdst - dst); \ | |
380 | dst = newdst; \ | |
381 | } while (0) | |
382 | ||
383 | /* Copy the source image sequentially, ie. section by section after | |
384 | copying the headers and section table, to simplify the process of | |
385 | relocating the .rdata and .reloc section table entries (which might | |
386 | force the raw section data to be relocated). | |
387 | ||
388 | Note that dst is updated implicitly by each COPY_CHUNK. */ | |
389 | ||
390 | dos_header = (PIMAGE_DOS_HEADER) p_infile->file_base; | |
177c0ea7 | 391 | nt_header = (PIMAGE_NT_HEADERS) (((unsigned long) dos_header) + |
95382f42 AI |
392 | dos_header->e_lfanew); |
393 | section = IMAGE_FIRST_SECTION (nt_header); | |
177c0ea7 | 394 | |
95382f42 AI |
395 | import_dir = &nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT]; |
396 | import_section = rva_to_section (import_dir->VirtualAddress, nt_header); | |
397 | ||
398 | reloc_dir = &nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC]; | |
399 | reloc_section = rva_to_section (reloc_dir->VirtualAddress, nt_header); | |
400 | if (!reloc_section) | |
401 | { | |
402 | printf ("No relocation data, cannot prepare for profile prepping.\n"); | |
403 | exit (1); | |
404 | } | |
405 | ||
406 | dst = (unsigned char *) p_outfile->file_base; | |
407 | ||
408 | COPY_CHUNK ("Copying DOS header...", dos_header, | |
409 | (DWORD) nt_header - (DWORD) dos_header); | |
410 | dst_nt_header = (PIMAGE_NT_HEADERS) dst; | |
411 | COPY_CHUNK ("Copying NT header...", nt_header, | |
412 | (DWORD) section - (DWORD) nt_header); | |
413 | dst_section = (PIMAGE_SECTION_HEADER) dst; | |
414 | COPY_CHUNK ("Copying section table...", section, | |
415 | nt_header->FileHeader.NumberOfSections * sizeof (*section)); | |
416 | ||
417 | /* Leave room for extra section table entries; filled in below. */ | |
418 | dst += 2 * sizeof (*section); | |
419 | ||
420 | /* Align the first section's raw data area, and set the header size | |
421 | field accordingly. */ | |
422 | ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment); | |
423 | dst_nt_header->OptionalHeader.SizeOfHeaders = DST_TO_OFFSET (); | |
424 | ||
425 | for (i = 0; i < nt_header->FileHeader.NumberOfSections; | |
426 | i++, section++, dst_section++) | |
427 | { | |
428 | char msg[100]; | |
429 | sprintf (msg, "Copying raw data for %s...", section->Name); | |
430 | ||
431 | /* "Blank out" the two sections being relocated. */ | |
432 | if (section == import_section || section == reloc_section) | |
433 | { | |
434 | dst_section->Name[0] = 'X'; | |
435 | dst_section->Misc.VirtualSize = | |
436 | ROUND_UP (dst_section->Misc.VirtualSize, | |
437 | dst_nt_header->OptionalHeader.SectionAlignment); | |
438 | dst_section->PointerToRawData = 0; | |
439 | dst_section->SizeOfRawData = 0; | |
440 | dst_section->Characteristics &= ~IMAGE_SCN_CNT_INITIALIZED_DATA; | |
441 | dst_section->Characteristics |= IMAGE_SCN_CNT_UNINITIALIZED_DATA; | |
442 | dst_section->Characteristics &= ~IMAGE_SCN_MEM_WRITE; | |
443 | continue; | |
444 | } | |
445 | ||
446 | /* Update the file-relative offset for this section's raw data (if | |
447 | it has any) in case things have been relocated; we will update | |
448 | the other offsets below once we know where everything is. */ | |
449 | if (dst_section->PointerToRawData) | |
450 | dst_section->PointerToRawData = DST_TO_OFFSET (); | |
451 | ||
452 | /* Copy the original raw data. */ | |
453 | COPY_CHUNK | |
454 | (msg, OFFSET_TO_PTR (section->PointerToRawData, p_infile), | |
455 | section->SizeOfRawData); | |
456 | ||
457 | /* Round up the raw data size to the new alignment. */ | |
458 | dst_section->SizeOfRawData = | |
459 | ROUND_UP (dst_section->SizeOfRawData, | |
460 | dst_nt_header->OptionalHeader.FileAlignment); | |
461 | ||
462 | /* Align the next section's raw data area. */ | |
463 | ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment); | |
464 | } | |
465 | ||
466 | /* Add the extra section entries, copying the raw data we skipped | |
467 | earlier. We'll patch up the data itself below. */ | |
468 | if (import_section != NULL) | |
469 | { | |
470 | dst_nt_header->FileHeader.NumberOfSections++; | |
471 | dst_nt_header->OptionalHeader.SizeOfImage += | |
472 | ROUND_UP (import_section->Misc.VirtualSize, | |
473 | dst_nt_header->OptionalHeader.SectionAlignment); | |
474 | *dst_section = *import_section; | |
475 | dst_section->VirtualAddress = | |
476 | dst_section[-1].VirtualAddress | |
477 | + ROUND_UP (dst_section[-1].Misc.VirtualSize, | |
478 | dst_nt_header->OptionalHeader.SectionAlignment); | |
479 | dst_section->PointerToRawData = DST_TO_OFFSET (); | |
480 | /* Remember delta applied to import section. */ | |
481 | import_delta_rva = dst_section->VirtualAddress - import_section->VirtualAddress; | |
482 | COPY_CHUNK | |
483 | ("Relocating import directory", | |
484 | OFFSET_TO_PTR (import_section->PointerToRawData, p_infile), | |
485 | import_section->SizeOfRawData); | |
486 | ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment); | |
487 | dst_section++; | |
488 | } | |
489 | if (reloc_section != NULL) | |
490 | { | |
491 | dst_nt_header->FileHeader.NumberOfSections++; | |
492 | dst_nt_header->OptionalHeader.SizeOfImage += | |
493 | ROUND_UP (reloc_section->Misc.VirtualSize, | |
494 | dst_nt_header->OptionalHeader.SectionAlignment); | |
495 | *dst_section = *reloc_section; | |
496 | dst_section->VirtualAddress = | |
497 | dst_section[-1].VirtualAddress | |
498 | + ROUND_UP (dst_section[-1].Misc.VirtualSize, | |
499 | dst_nt_header->OptionalHeader.SectionAlignment); | |
500 | dst_section->PointerToRawData = DST_TO_OFFSET (); | |
501 | /* Remember delta applied to reloc section. */ | |
502 | reloc_delta_rva = dst_section->VirtualAddress - reloc_section->VirtualAddress; | |
503 | COPY_CHUNK | |
504 | ("Relocating base relocations directory", | |
505 | OFFSET_TO_PTR (reloc_section->PointerToRawData, p_infile), | |
506 | reloc_section->SizeOfRawData); | |
507 | ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment); | |
508 | reloc_dir = &dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC]; | |
509 | reloc_dir->VirtualAddress += reloc_delta_rva; | |
510 | dst_section++; | |
511 | } | |
512 | ||
513 | /* Copy remainder of source image. */ | |
514 | section--; | |
515 | offset = ROUND_UP (section->PointerToRawData + section->SizeOfRawData, | |
516 | nt_header->OptionalHeader.FileAlignment); | |
517 | COPY_CHUNK | |
518 | ("Copying remainder of executable...", | |
519 | OFFSET_TO_PTR (offset, p_infile), | |
520 | p_infile->size - offset); | |
521 | ||
522 | /* Final size for new image. */ | |
523 | p_outfile->size = DST_TO_OFFSET (); | |
524 | ||
525 | /* Now patch up remaining file-relative offsets. */ | |
526 | printf ("Patching up raw data offsets...\n"); | |
527 | ||
528 | section = IMAGE_FIRST_SECTION (nt_header); | |
529 | dst_section = IMAGE_FIRST_SECTION (dst_nt_header); | |
530 | ||
531 | #define ADJUST_OFFSET(var) \ | |
532 | do { \ | |
533 | if ((var) != 0) \ | |
534 | (var) = relocate_offset ((var), nt_header, dst_nt_header); \ | |
535 | } while (0) | |
536 | ||
537 | #define ADJUST_IMPORT_RVA(var) \ | |
538 | do { \ | |
539 | if ((var) != 0) \ | |
540 | *((DWORD *)&(var)) += import_delta_rva; \ | |
541 | } while (0) | |
542 | ||
543 | dst_nt_header->OptionalHeader.SizeOfInitializedData = 0; | |
544 | dst_nt_header->OptionalHeader.SizeOfUninitializedData = 0; | |
545 | for (i = 0; i < dst_nt_header->FileHeader.NumberOfSections; i++) | |
546 | { | |
547 | /* Recompute data sizes for completeness. */ | |
548 | if (dst_section[i].Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA) | |
549 | dst_nt_header->OptionalHeader.SizeOfInitializedData += | |
550 | ROUND_UP (dst_section[i].Misc.VirtualSize, dst_nt_header->OptionalHeader.FileAlignment); | |
551 | else if (dst_section[i].Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) | |
552 | dst_nt_header->OptionalHeader.SizeOfUninitializedData += | |
553 | ROUND_UP (dst_section[i].Misc.VirtualSize, dst_nt_header->OptionalHeader.FileAlignment); | |
554 | ||
555 | ADJUST_OFFSET (dst_section[i].PointerToLinenumbers); | |
556 | } | |
557 | ||
558 | ADJUST_OFFSET (dst_nt_header->FileHeader.PointerToSymbolTable); | |
559 | ||
560 | /* Update offsets in debug directory entries. Note that the debug | |
561 | directory may be in the same section as the import table, so its | |
562 | RVA may need to be adjusted too. */ | |
563 | { | |
564 | PIMAGE_DATA_DIRECTORY debug_dir = | |
565 | &dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG]; | |
566 | PIMAGE_DEBUG_DIRECTORY debug_entry; | |
567 | ||
568 | /* Update debug_dir if part of import_section. */ | |
569 | if (rva_to_section (debug_dir->VirtualAddress, nt_header) == import_section) | |
570 | debug_dir->VirtualAddress += import_delta_rva; | |
571 | ||
572 | section = rva_to_section (debug_dir->VirtualAddress, dst_nt_header); | |
573 | if (section) | |
574 | { | |
575 | int size; | |
576 | ||
577 | debug_entry = RVA_TO_PTR (debug_dir->VirtualAddress, section, p_outfile); | |
578 | size = debug_dir->Size / sizeof (IMAGE_DEBUG_DIRECTORY); | |
579 | ||
580 | for (i = 0; i < size; i++, debug_entry++) | |
581 | { | |
582 | /* The debug data itself is normally not part of any | |
583 | section, but stored after all the raw section data. So | |
584 | let relocate_offset do the work. */ | |
585 | ADJUST_OFFSET (debug_entry->PointerToRawData); | |
586 | ADJUST_IMPORT_RVA (debug_entry->AddressOfRawData); | |
587 | } | |
588 | } | |
589 | } | |
590 | ||
591 | /* Update RVAs in import directory entries. */ | |
592 | { | |
593 | PIMAGE_IMPORT_DESCRIPTOR imports; | |
594 | PIMAGE_THUNK_DATA import_thunks; | |
595 | ||
596 | import_dir = &dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT]; | |
597 | import_dir->VirtualAddress += import_delta_rva; | |
598 | ||
599 | section = rva_to_section (import_dir->VirtualAddress, dst_nt_header); | |
600 | imports = RVA_TO_PTR (import_dir->VirtualAddress, section, p_outfile); | |
601 | ||
602 | for ( ; imports->Name != 0; imports++) | |
603 | { | |
604 | ADJUST_IMPORT_RVA (imports->OriginalFirstThunk); | |
605 | ADJUST_IMPORT_RVA (imports->FirstThunk); | |
606 | ADJUST_IMPORT_RVA (imports->Name); | |
607 | ||
608 | for (import_thunks = RVA_TO_PTR (imports->OriginalFirstThunk, section, p_outfile); | |
609 | import_thunks->u1.Function != 0; | |
610 | import_thunks++) | |
611 | if ((import_thunks->u1.Ordinal >> 31) == 0) | |
612 | ADJUST_IMPORT_RVA (import_thunks->u1.Ordinal); | |
613 | ||
614 | for (import_thunks = RVA_TO_PTR (imports->FirstThunk, section, p_outfile); | |
615 | import_thunks->u1.Function != 0; | |
616 | import_thunks++) | |
617 | if ((import_thunks->u1.Ordinal >> 31) == 0) | |
618 | ADJUST_IMPORT_RVA (import_thunks->u1.Ordinal); | |
619 | } | |
620 | ||
621 | import_dir = &dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IAT]; | |
622 | import_dir->VirtualAddress += import_delta_rva; | |
623 | } | |
624 | ||
625 | /* Fix up references to the import section. */ | |
626 | printf ("Applying fixups to import references...\n"); | |
627 | ||
628 | { | |
629 | IMAGE_BASE_RELOCATION *relocs, *block, *start_block, *end_block; | |
630 | DWORD import_start = import_section->VirtualAddress + dst_nt_header->OptionalHeader.ImageBase; | |
631 | DWORD import_end = import_start + import_section->Misc.VirtualSize; | |
632 | DWORD len_import_relocs; | |
633 | DWORD len_remaining_relocs; | |
634 | int seen_high = 0; | |
635 | WORD * high_word; | |
636 | void * holder; | |
637 | ||
638 | reloc_dir = &dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC]; | |
639 | reloc_section = rva_to_section (reloc_dir->VirtualAddress, dst_nt_header); | |
640 | relocs = RVA_TO_PTR (reloc_dir->VirtualAddress, reloc_section, p_outfile); | |
641 | ||
642 | /* Move the base relocations for the import section, if there are | |
643 | any; the profiler needs to be able to patch RVAs in the import | |
644 | section itself. */ | |
645 | for (block = relocs, start_block = 0; | |
646 | (DWORD) block - (DWORD) relocs < reloc_dir->Size; | |
647 | block = (void *)((DWORD) block + block->SizeOfBlock)) | |
648 | { | |
649 | if (block->VirtualAddress >= import_section->VirtualAddress + import_section->Misc.VirtualSize) | |
650 | { | |
651 | end_block = block; | |
652 | break; | |
653 | } | |
654 | if (block->VirtualAddress >= import_section->VirtualAddress) | |
655 | { | |
656 | if (start_block == 0) | |
657 | start_block = block; | |
658 | block->VirtualAddress += import_delta_rva; | |
659 | } | |
660 | } | |
661 | if (start_block) | |
662 | { | |
663 | len_import_relocs = (DWORD) end_block - (DWORD) start_block; | |
664 | len_remaining_relocs = (DWORD) relocs + reloc_dir->Size - (DWORD) end_block; | |
665 | holder = malloc (len_import_relocs); | |
666 | if (holder == 0) | |
667 | abort (); | |
668 | memcpy (holder, start_block, len_import_relocs); | |
669 | memcpy (start_block, end_block, len_remaining_relocs); | |
670 | memcpy ((char *) start_block + len_remaining_relocs, holder, len_import_relocs); | |
671 | free (holder); | |
672 | } | |
673 | ||
674 | /* Walk up the list of base relocations, checking for references | |
675 | to the old import section location, and patching them to | |
676 | reference the new location. */ | |
677 | for (block = relocs; | |
678 | (DWORD) block - (DWORD) relocs < reloc_dir->Size; | |
679 | block = (void *)((DWORD) block + block->SizeOfBlock)) | |
680 | { | |
681 | DWORD page_rva = block->VirtualAddress; | |
682 | DWORD page_offset; | |
683 | union { | |
684 | WORD word; | |
685 | DWORD dword; | |
686 | } * ploc; | |
687 | WORD *fixup; | |
688 | ||
689 | section = rva_to_section (page_rva, dst_nt_header); | |
690 | /* Don't apply fixups to the blanked sections. */ | |
691 | if (section->Name[0] == 'X') | |
692 | continue; | |
693 | ||
694 | for (fixup = (WORD *) &block[1]; | |
695 | (DWORD) fixup - (DWORD) block < block->SizeOfBlock; | |
696 | fixup++) | |
697 | { | |
698 | page_offset = (*fixup) & 0xfff; | |
699 | ploc = RVA_TO_PTR (page_rva + page_offset, section, p_outfile); | |
700 | ||
701 | /* Unless our assumption is wrong, all low word fixups | |
702 | should immediately follow a high fixup. */ | |
703 | if (seen_high && ((*fixup) >> 12) != IMAGE_REL_BASED_LOW) | |
704 | abort (); | |
705 | ||
706 | switch ((*fixup) >> 12) | |
707 | { | |
708 | case IMAGE_REL_BASED_ABSOLUTE: | |
709 | break; | |
710 | case IMAGE_REL_BASED_HIGH: | |
711 | /* We must assume that high and low fixups occur in | |
712 | pairs, specifically a low fixup immediately follows a | |
713 | high fixup (normally separated by two bytes). We | |
714 | have to process the two fixups together, to find out | |
715 | the full pointer value and decide whether to apply | |
716 | the fixup. */ | |
717 | seen_high = 1; | |
718 | high_word = &ploc->word; | |
719 | break; | |
720 | case IMAGE_REL_BASED_LOW: | |
721 | offset = (*high_word << 16) + ploc->word; | |
722 | if (offset >= import_start && offset < import_end) | |
723 | { | |
724 | (*high_word) += import_delta_rva >> 16; | |
725 | ploc->dword += import_delta_rva & 0xffff; | |
726 | } | |
727 | seen_high = 0; | |
728 | break; | |
729 | case IMAGE_REL_BASED_HIGHLOW: | |
730 | /* Docs imply two words in big-endian order, so perhaps | |
731 | this is only used on big-endian platforms, in which | |
732 | case the obvious code will work. */ | |
733 | if (ploc->dword >= import_start && ploc->dword < import_end) | |
734 | ploc->dword += import_delta_rva; | |
735 | break; | |
736 | case IMAGE_REL_BASED_HIGHADJ: | |
737 | /* Docs don't say, but I guess this is the equivalent | |
738 | for little-endian platforms. */ | |
739 | if (ploc->dword >= import_start && ploc->dword < import_end) | |
740 | ploc->dword += import_delta_rva; | |
741 | break; | |
742 | case IMAGE_REL_BASED_MIPS_JMPADDR: | |
743 | /* Don't know how to handle this; MIPS support has been | |
744 | dropped from NT4 anyway. */ | |
745 | abort (); | |
746 | break; | |
f78b1e5e | 747 | #ifdef IMAGE_REL_BASED_SECTION |
95382f42 AI |
748 | case IMAGE_REL_BASED_SECTION: |
749 | case IMAGE_REL_BASED_REL32: | |
750 | /* Docs don't say what these values mean. */ | |
3102421f AI |
751 | #endif |
752 | default: | |
95382f42 AI |
753 | abort (); |
754 | } | |
755 | } | |
756 | } | |
757 | } | |
758 | } | |
759 | ||
760 | ||
761 | int | |
762 | main (int argc, char **argv) | |
763 | { | |
764 | PIMAGE_DOS_HEADER dos_header; | |
765 | PIMAGE_NT_HEADERS nt_header; | |
766 | file_data in_file, out_file; | |
767 | char out_filename[MAX_PATH], in_filename[MAX_PATH]; | |
95382f42 AI |
768 | |
769 | strcpy (in_filename, argv[1]); | |
770 | strcpy (out_filename, argv[2]); | |
771 | ||
772 | printf ("Preparing %s for profile prepping\n", out_filename); | |
773 | ||
774 | /* Open the original (dumped) executable file for reference. */ | |
775 | if (!open_input_file (&in_file, in_filename)) | |
776 | { | |
177c0ea7 | 777 | printf ("Failed to open %s (%d)...bailing.\n", |
95382f42 AI |
778 | in_filename, GetLastError ()); |
779 | exit (1); | |
780 | } | |
781 | ||
782 | /* Create a new image that can be prepped; we don't expect the size to | |
783 | change because we are only adding two new section table entries, | |
784 | which should fit in the alignment slop. */ | |
785 | if (!open_output_file (&out_file, out_filename, in_file.size)) | |
786 | { | |
177c0ea7 | 787 | printf ("Failed to open %s (%d)...bailing.\n", |
95382f42 AI |
788 | out_filename, GetLastError ()); |
789 | exit (1); | |
790 | } | |
791 | ||
792 | copy_executable_and_move_sections (&in_file, &out_file); | |
793 | ||
794 | /* Patch up header fields; profiler is picky about this. */ | |
795 | { | |
796 | HANDLE hImagehelp = LoadLibrary ("imagehlp.dll"); | |
797 | DWORD headersum; | |
798 | DWORD checksum; | |
799 | ||
800 | dos_header = (PIMAGE_DOS_HEADER) out_file.file_base; | |
801 | nt_header = (PIMAGE_NT_HEADERS) ((char *) dos_header + dos_header->e_lfanew); | |
802 | ||
803 | nt_header->OptionalHeader.CheckSum = 0; | |
804 | // nt_header->FileHeader.TimeDateStamp = time (NULL); | |
805 | // dos_header->e_cp = size / 512; | |
806 | // nt_header->OptionalHeader.SizeOfImage = size; | |
807 | ||
808 | pfnCheckSumMappedFile = (void *) GetProcAddress (hImagehelp, "CheckSumMappedFile"); | |
809 | if (pfnCheckSumMappedFile) | |
810 | { | |
811 | // nt_header->FileHeader.TimeDateStamp = time (NULL); | |
812 | pfnCheckSumMappedFile (out_file.file_base, | |
813 | out_file.size, | |
814 | &headersum, | |
815 | &checksum); | |
816 | nt_header->OptionalHeader.CheckSum = checksum; | |
817 | } | |
818 | FreeLibrary (hImagehelp); | |
819 | } | |
820 | ||
821 | close_file_data (&out_file); | |
822 | close_file_data (&in_file); | |
823 | ||
824 | return 0; | |
825 | } | |
826 | ||
827 | /* eof */ |