Commit | Line | Data |
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95382f42 | 1 | /* Pro-process emacs.exe for profiling by MSVC. |
62eda0e2 GM |
2 | Copyright (C) 1999, 2001, 2002, 2003, 2004, 2005, |
3 | 2006, 2007 Free Software Foundation, Inc. | |
95382f42 AI |
4 | |
5 | This file is part of GNU Emacs. | |
6 | ||
7 | GNU Emacs is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2, or (at your option) | |
10 | any later version. | |
11 | ||
12 | GNU Emacs is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with GNU Emacs; see the file COPYING. If not, write to | |
364c38d3 LK |
19 | the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
20 | Boston, MA 02110-1301, USA. | |
95382f42 AI |
21 | |
22 | Andrew Innes <andrewi@harlequin.co.uk> 16-Jan-1999 | |
23 | based on code from addsection.c | |
24 | */ | |
25 | ||
26 | #include <stdlib.h> | |
27 | #include <stdio.h> | |
28 | #include <fcntl.h> | |
29 | #include <time.h> | |
a1375c9f AI |
30 | #ifdef __GNUC__ |
31 | #define _ANONYMOUS_UNION | |
32 | #define _ANONYMOUS_STRUCT | |
33 | #endif | |
95382f42 AI |
34 | #include <windows.h> |
35 | ||
36 | /* Include relevant definitions from IMAGEHLP.H, which can be found | |
37 | in \\win32sdk\mstools\samples\image\include\imagehlp.h. */ | |
38 | ||
39 | PIMAGE_NT_HEADERS | |
40 | (__stdcall * pfnCheckSumMappedFile) (LPVOID BaseAddress, | |
41 | DWORD FileLength, | |
42 | LPDWORD HeaderSum, | |
43 | LPDWORD CheckSum); | |
44 | ||
45 | #undef min | |
46 | #undef max | |
47 | #define min(x, y) (((x) < (y)) ? (x) : (y)) | |
48 | #define max(x, y) (((x) > (y)) ? (x) : (y)) | |
49 | ||
50 | ||
51 | /* File handling. */ | |
52 | ||
53 | typedef struct file_data { | |
54 | char *name; | |
55 | unsigned long size; | |
56 | HANDLE file; | |
57 | HANDLE file_mapping; | |
58 | unsigned char *file_base; | |
59 | } file_data; | |
60 | ||
61 | int | |
62 | open_input_file (file_data *p_file, char *filename) | |
63 | { | |
64 | HANDLE file; | |
65 | HANDLE file_mapping; | |
66 | void *file_base; | |
67 | unsigned long size, upper_size; | |
68 | ||
69 | file = CreateFile (filename, GENERIC_READ, FILE_SHARE_READ, NULL, | |
70 | OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); | |
177c0ea7 | 71 | if (file == INVALID_HANDLE_VALUE) |
95382f42 AI |
72 | return FALSE; |
73 | ||
74 | size = GetFileSize (file, &upper_size); | |
177c0ea7 | 75 | file_mapping = CreateFileMapping (file, NULL, PAGE_READONLY, |
95382f42 | 76 | 0, size, NULL); |
177c0ea7 | 77 | if (!file_mapping) |
95382f42 AI |
78 | return FALSE; |
79 | ||
80 | file_base = MapViewOfFile (file_mapping, FILE_MAP_READ, 0, 0, size); | |
177c0ea7 | 81 | if (file_base == 0) |
95382f42 AI |
82 | return FALSE; |
83 | ||
84 | p_file->name = filename; | |
85 | p_file->size = size; | |
86 | p_file->file = file; | |
87 | p_file->file_mapping = file_mapping; | |
88 | p_file->file_base = file_base; | |
89 | ||
90 | return TRUE; | |
91 | } | |
92 | ||
93 | int | |
94 | open_output_file (file_data *p_file, char *filename, unsigned long size) | |
95 | { | |
96 | HANDLE file; | |
97 | HANDLE file_mapping; | |
98 | void *file_base; | |
99 | ||
100 | file = CreateFile (filename, GENERIC_READ | GENERIC_WRITE, 0, NULL, | |
101 | CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0); | |
177c0ea7 | 102 | if (file == INVALID_HANDLE_VALUE) |
95382f42 AI |
103 | return FALSE; |
104 | ||
177c0ea7 | 105 | file_mapping = CreateFileMapping (file, NULL, PAGE_READWRITE, |
95382f42 | 106 | 0, size, NULL); |
177c0ea7 | 107 | if (!file_mapping) |
95382f42 | 108 | return FALSE; |
177c0ea7 | 109 | |
95382f42 | 110 | file_base = MapViewOfFile (file_mapping, FILE_MAP_WRITE, 0, 0, size); |
177c0ea7 | 111 | if (file_base == 0) |
95382f42 | 112 | return FALSE; |
177c0ea7 | 113 | |
95382f42 AI |
114 | p_file->name = filename; |
115 | p_file->size = size; | |
116 | p_file->file = file; | |
117 | p_file->file_mapping = file_mapping; | |
118 | p_file->file_base = file_base; | |
119 | ||
120 | return TRUE; | |
121 | } | |
122 | ||
123 | int | |
124 | open_inout_file (file_data *p_file, char *filename) | |
125 | { | |
126 | HANDLE file; | |
127 | HANDLE file_mapping; | |
128 | void *file_base; | |
129 | unsigned long size, upper_size; | |
130 | ||
131 | file = CreateFile (filename, GENERIC_READ | GENERIC_WRITE, 0, NULL, | |
132 | OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); | |
177c0ea7 | 133 | if (file == INVALID_HANDLE_VALUE) |
95382f42 AI |
134 | return FALSE; |
135 | ||
136 | size = GetFileSize (file, &upper_size); | |
137 | file_mapping = CreateFileMapping (file, NULL, PAGE_READWRITE, | |
138 | 0, size, NULL); | |
177c0ea7 | 139 | if (!file_mapping) |
95382f42 AI |
140 | return FALSE; |
141 | ||
142 | file_base = MapViewOfFile (file_mapping, FILE_MAP_WRITE, 0, 0, size); | |
177c0ea7 | 143 | if (file_base == 0) |
95382f42 AI |
144 | return FALSE; |
145 | ||
146 | p_file->name = filename; | |
147 | p_file->size = size; | |
148 | p_file->file = file; | |
149 | p_file->file_mapping = file_mapping; | |
150 | p_file->file_base = file_base; | |
151 | ||
152 | return TRUE; | |
153 | } | |
154 | ||
155 | /* Close the system structures associated with the given file. */ | |
156 | void | |
157 | close_file_data (file_data *p_file) | |
158 | { | |
159 | UnmapViewOfFile (p_file->file_base); | |
160 | CloseHandle (p_file->file_mapping); | |
161 | /* For the case of output files, set final size. */ | |
162 | SetFilePointer (p_file->file, p_file->size, NULL, FILE_BEGIN); | |
163 | SetEndOfFile (p_file->file); | |
164 | CloseHandle (p_file->file); | |
165 | } | |
166 | ||
167 | ||
168 | /* Routines to manipulate NT executable file sections. */ | |
169 | ||
170 | unsigned long | |
171 | get_unrounded_section_size (PIMAGE_SECTION_HEADER p_section) | |
172 | { | |
173 | /* The true section size, before rounding, for an initialized data or | |
174 | code section. (Supposedly some linkers swap the meaning of these | |
175 | two values.) */ | |
176 | return min (p_section->SizeOfRawData, | |
177 | p_section->Misc.VirtualSize); | |
178 | } | |
179 | ||
180 | /* Return pointer to section header for named section. */ | |
181 | IMAGE_SECTION_HEADER * | |
182 | find_section (char * name, IMAGE_NT_HEADERS * nt_header) | |
183 | { | |
184 | PIMAGE_SECTION_HEADER section; | |
185 | int i; | |
186 | ||
187 | section = IMAGE_FIRST_SECTION (nt_header); | |
188 | ||
189 | for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++) | |
190 | { | |
191 | if (strcmp (section->Name, name) == 0) | |
192 | return section; | |
193 | section++; | |
194 | } | |
195 | return NULL; | |
196 | } | |
197 | ||
198 | /* Return pointer to section header for section containing the given | |
199 | relative virtual address. */ | |
200 | IMAGE_SECTION_HEADER * | |
201 | rva_to_section (DWORD rva, IMAGE_NT_HEADERS * nt_header) | |
202 | { | |
203 | PIMAGE_SECTION_HEADER section; | |
204 | int i; | |
205 | ||
206 | section = IMAGE_FIRST_SECTION (nt_header); | |
207 | ||
208 | for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++) | |
209 | { | |
210 | /* Some linkers (eg. the NT SDK linker I believe) swapped the | |
211 | meaning of these two values - or rather, they ignored | |
212 | VirtualSize entirely and always set it to zero. This affects | |
213 | some very old exes (eg. gzip dated Dec 1993). Since | |
214 | w32_executable_type relies on this function to work reliably, | |
215 | we need to cope with this. */ | |
216 | DWORD real_size = max (section->SizeOfRawData, | |
217 | section->Misc.VirtualSize); | |
218 | if (rva >= section->VirtualAddress | |
219 | && rva < section->VirtualAddress + real_size) | |
220 | return section; | |
221 | section++; | |
222 | } | |
223 | return NULL; | |
224 | } | |
225 | ||
226 | /* Return pointer to section header for section containing the given | |
227 | offset in its raw data area. */ | |
228 | IMAGE_SECTION_HEADER * | |
229 | offset_to_section (DWORD offset, IMAGE_NT_HEADERS * nt_header) | |
230 | { | |
231 | PIMAGE_SECTION_HEADER section; | |
232 | int i; | |
233 | ||
234 | section = IMAGE_FIRST_SECTION (nt_header); | |
235 | ||
236 | for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++) | |
237 | { | |
238 | if (offset >= section->PointerToRawData | |
239 | && offset < section->PointerToRawData + section->SizeOfRawData) | |
240 | return section; | |
241 | section++; | |
242 | } | |
243 | return NULL; | |
244 | } | |
245 | ||
246 | /* Return offset to an object in dst, given offset in src. We assume | |
247 | there is at least one section in both src and dst images, and that | |
248 | the some sections may have been added to dst (after sections in src). */ | |
249 | static DWORD | |
250 | relocate_offset (DWORD offset, | |
251 | IMAGE_NT_HEADERS * src_nt_header, | |
252 | IMAGE_NT_HEADERS * dst_nt_header) | |
253 | { | |
254 | PIMAGE_SECTION_HEADER src_section = IMAGE_FIRST_SECTION (src_nt_header); | |
255 | PIMAGE_SECTION_HEADER dst_section = IMAGE_FIRST_SECTION (dst_nt_header); | |
256 | int i = 0; | |
257 | ||
258 | while (offset >= src_section->PointerToRawData) | |
259 | { | |
260 | if (offset < src_section->PointerToRawData + src_section->SizeOfRawData) | |
261 | break; | |
262 | i++; | |
263 | if (i == src_nt_header->FileHeader.NumberOfSections) | |
264 | { | |
265 | /* Handle offsets after the last section. */ | |
266 | dst_section = IMAGE_FIRST_SECTION (dst_nt_header); | |
267 | dst_section += dst_nt_header->FileHeader.NumberOfSections - 1; | |
268 | while (dst_section->PointerToRawData == 0) | |
269 | dst_section--; | |
270 | while (src_section->PointerToRawData == 0) | |
271 | src_section--; | |
272 | return offset | |
273 | + (dst_section->PointerToRawData + dst_section->SizeOfRawData) | |
274 | - (src_section->PointerToRawData + src_section->SizeOfRawData); | |
275 | } | |
276 | src_section++; | |
277 | dst_section++; | |
278 | } | |
279 | return offset + | |
280 | (dst_section->PointerToRawData - src_section->PointerToRawData); | |
281 | } | |
282 | ||
283 | #define OFFSET_TO_RVA(offset, section) \ | |
284 | (section->VirtualAddress + ((DWORD)(offset) - section->PointerToRawData)) | |
285 | ||
286 | #define RVA_TO_OFFSET(rva, section) \ | |
287 | (section->PointerToRawData + ((DWORD)(rva) - section->VirtualAddress)) | |
288 | ||
289 | #define RVA_TO_SECTION_OFFSET(rva, section) \ | |
290 | ((DWORD)(rva) - section->VirtualAddress) | |
291 | ||
292 | #define RVA_TO_PTR(var,section,filedata) \ | |
293 | ((void *)(RVA_TO_OFFSET(var,section) + (filedata)->file_base)) | |
294 | ||
295 | /* Convert address in executing image to RVA. */ | |
296 | #define PTR_TO_RVA(ptr) ((DWORD)(ptr) - (DWORD) GetModuleHandle (NULL)) | |
297 | ||
298 | #define PTR_TO_OFFSET(ptr, pfile_data) \ | |
8b1709cc | 299 | ((unsigned char *)(ptr) - (pfile_data)->file_base) |
95382f42 AI |
300 | |
301 | #define OFFSET_TO_PTR(offset, pfile_data) \ | |
302 | ((pfile_data)->file_base + (DWORD)(offset)) | |
303 | ||
304 | #define ROUND_UP(p, align) (((DWORD)(p) + (align)-1) & ~((align)-1)) | |
305 | #define ROUND_DOWN(p, align) ((DWORD)(p) & ~((align)-1)) | |
306 | ||
307 | ||
308 | /* The MSVC prep program generates a ._xe file from .exe, where relevant | |
309 | function calls etc have been patched to go through thunks (generated | |
310 | by prep) that record timing/call information. Because the thunks | |
311 | need to make references to functions imported from profile.dll, the | |
312 | import table must be expanded; the end result is that all the | |
313 | sections following .rdata are relocated to higher RVAs (add a final | |
314 | code section is added holding all the thunks). The .reloc section is | |
315 | also expanded, so that the thunks themselves are relocatable. | |
316 | ||
317 | It is this relocation which kills emacs._xe, because the dumped heap | |
318 | pointers aren't relocated, because there is no relocation data for | |
319 | either the relevant global/static variables or the heap section | |
320 | itself, both of which contain pointers into the heap. [Note that | |
321 | static variables which aren't initialized during linking may become | |
322 | initialized with heap pointers, or even pointers to other static | |
323 | variables, because of dumping.] | |
324 | ||
325 | We could potentially generate the relocation data ourselves by making | |
326 | two versions of temacs, one with an extra dummmy section before | |
327 | EMHEAP to offset it, and then compare the dumped executables from | |
328 | both. That is a lot of work though, and it doesn't solve the problem | |
329 | of dumped pointers to static variables, which also can be relocated. | |
330 | ||
331 | A better solution is to pre-process emacs.exe so that the .rdata and | |
332 | .reloc sections are moved to the end of the section table, and thus | |
333 | prep won't relocate anything else. (Of course, we leave "dead" | |
334 | copies of these two sections in place, so that the virtual address of | |
335 | everything else is unaffected.) Relocating the .reloc data is | |
336 | trivial - we just update the IMAGE_BASE_RELOCATION address in the | |
337 | header (the data itself doesn't change). Relocating the import table | |
338 | is more complicated though, because the calls to imported functions | |
339 | must be patched up. That requires us to selectively apply the base | |
340 | relocations when we encounter references to imported functions (or | |
341 | variables) in other sections, but at least the base relocations are | |
342 | easy to parse. */ | |
343 | ||
344 | static void | |
177c0ea7 | 345 | copy_executable_and_move_sections (file_data *p_infile, |
95382f42 AI |
346 | file_data *p_outfile) |
347 | { | |
348 | unsigned char *dst; | |
349 | PIMAGE_DOS_HEADER dos_header; | |
350 | PIMAGE_NT_HEADERS nt_header; | |
351 | PIMAGE_NT_HEADERS dst_nt_header; | |
352 | PIMAGE_SECTION_HEADER section; | |
353 | PIMAGE_SECTION_HEADER dst_section; | |
354 | PIMAGE_SECTION_HEADER import_section; | |
355 | PIMAGE_SECTION_HEADER reloc_section; | |
356 | PIMAGE_DATA_DIRECTORY import_dir; | |
357 | PIMAGE_DATA_DIRECTORY reloc_dir; | |
358 | DWORD import_delta_rva; | |
359 | DWORD reloc_delta_rva; | |
360 | DWORD offset; | |
361 | int i; | |
362 | ||
363 | #define COPY_CHUNK(message, src, size) \ | |
364 | do { \ | |
365 | unsigned char *s = (void *)(src); \ | |
366 | unsigned long count = (size); \ | |
367 | printf ("%s\n", (message)); \ | |
368 | printf ("\t0x%08x Offset in input file.\n", s - p_infile->file_base); \ | |
369 | printf ("\t0x%08x Offset in output file.\n", dst - p_outfile->file_base); \ | |
370 | printf ("\t0x%08x Size in bytes.\n", count); \ | |
371 | memcpy (dst, s, count); \ | |
372 | dst += count; \ | |
373 | } while (0) | |
374 | ||
375 | #define DST_TO_OFFSET() PTR_TO_OFFSET (dst, p_outfile) | |
376 | #define ROUND_UP_DST_AND_ZERO(align) \ | |
377 | do { \ | |
378 | unsigned char *newdst = p_outfile->file_base \ | |
379 | + ROUND_UP (DST_TO_OFFSET (), (align)); \ | |
380 | /* Zero the alignment slop; it may actually initialize real data. */ \ | |
381 | memset (dst, 0, newdst - dst); \ | |
382 | dst = newdst; \ | |
383 | } while (0) | |
384 | ||
385 | /* Copy the source image sequentially, ie. section by section after | |
386 | copying the headers and section table, to simplify the process of | |
387 | relocating the .rdata and .reloc section table entries (which might | |
388 | force the raw section data to be relocated). | |
389 | ||
390 | Note that dst is updated implicitly by each COPY_CHUNK. */ | |
391 | ||
392 | dos_header = (PIMAGE_DOS_HEADER) p_infile->file_base; | |
177c0ea7 | 393 | nt_header = (PIMAGE_NT_HEADERS) (((unsigned long) dos_header) + |
95382f42 AI |
394 | dos_header->e_lfanew); |
395 | section = IMAGE_FIRST_SECTION (nt_header); | |
177c0ea7 | 396 | |
95382f42 AI |
397 | import_dir = &nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT]; |
398 | import_section = rva_to_section (import_dir->VirtualAddress, nt_header); | |
399 | ||
400 | reloc_dir = &nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC]; | |
401 | reloc_section = rva_to_section (reloc_dir->VirtualAddress, nt_header); | |
402 | if (!reloc_section) | |
403 | { | |
404 | printf ("No relocation data, cannot prepare for profile prepping.\n"); | |
405 | exit (1); | |
406 | } | |
407 | ||
408 | dst = (unsigned char *) p_outfile->file_base; | |
409 | ||
410 | COPY_CHUNK ("Copying DOS header...", dos_header, | |
411 | (DWORD) nt_header - (DWORD) dos_header); | |
412 | dst_nt_header = (PIMAGE_NT_HEADERS) dst; | |
413 | COPY_CHUNK ("Copying NT header...", nt_header, | |
414 | (DWORD) section - (DWORD) nt_header); | |
415 | dst_section = (PIMAGE_SECTION_HEADER) dst; | |
416 | COPY_CHUNK ("Copying section table...", section, | |
417 | nt_header->FileHeader.NumberOfSections * sizeof (*section)); | |
418 | ||
419 | /* Leave room for extra section table entries; filled in below. */ | |
420 | dst += 2 * sizeof (*section); | |
421 | ||
422 | /* Align the first section's raw data area, and set the header size | |
423 | field accordingly. */ | |
424 | ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment); | |
425 | dst_nt_header->OptionalHeader.SizeOfHeaders = DST_TO_OFFSET (); | |
426 | ||
427 | for (i = 0; i < nt_header->FileHeader.NumberOfSections; | |
428 | i++, section++, dst_section++) | |
429 | { | |
430 | char msg[100]; | |
431 | sprintf (msg, "Copying raw data for %s...", section->Name); | |
432 | ||
433 | /* "Blank out" the two sections being relocated. */ | |
434 | if (section == import_section || section == reloc_section) | |
435 | { | |
436 | dst_section->Name[0] = 'X'; | |
437 | dst_section->Misc.VirtualSize = | |
438 | ROUND_UP (dst_section->Misc.VirtualSize, | |
439 | dst_nt_header->OptionalHeader.SectionAlignment); | |
440 | dst_section->PointerToRawData = 0; | |
441 | dst_section->SizeOfRawData = 0; | |
442 | dst_section->Characteristics &= ~IMAGE_SCN_CNT_INITIALIZED_DATA; | |
443 | dst_section->Characteristics |= IMAGE_SCN_CNT_UNINITIALIZED_DATA; | |
444 | dst_section->Characteristics &= ~IMAGE_SCN_MEM_WRITE; | |
445 | continue; | |
446 | } | |
447 | ||
448 | /* Update the file-relative offset for this section's raw data (if | |
449 | it has any) in case things have been relocated; we will update | |
450 | the other offsets below once we know where everything is. */ | |
451 | if (dst_section->PointerToRawData) | |
452 | dst_section->PointerToRawData = DST_TO_OFFSET (); | |
453 | ||
454 | /* Copy the original raw data. */ | |
455 | COPY_CHUNK | |
456 | (msg, OFFSET_TO_PTR (section->PointerToRawData, p_infile), | |
457 | section->SizeOfRawData); | |
458 | ||
459 | /* Round up the raw data size to the new alignment. */ | |
460 | dst_section->SizeOfRawData = | |
461 | ROUND_UP (dst_section->SizeOfRawData, | |
462 | dst_nt_header->OptionalHeader.FileAlignment); | |
463 | ||
464 | /* Align the next section's raw data area. */ | |
465 | ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment); | |
466 | } | |
467 | ||
468 | /* Add the extra section entries, copying the raw data we skipped | |
469 | earlier. We'll patch up the data itself below. */ | |
470 | if (import_section != NULL) | |
471 | { | |
472 | dst_nt_header->FileHeader.NumberOfSections++; | |
473 | dst_nt_header->OptionalHeader.SizeOfImage += | |
474 | ROUND_UP (import_section->Misc.VirtualSize, | |
475 | dst_nt_header->OptionalHeader.SectionAlignment); | |
476 | *dst_section = *import_section; | |
477 | dst_section->VirtualAddress = | |
478 | dst_section[-1].VirtualAddress | |
479 | + ROUND_UP (dst_section[-1].Misc.VirtualSize, | |
480 | dst_nt_header->OptionalHeader.SectionAlignment); | |
481 | dst_section->PointerToRawData = DST_TO_OFFSET (); | |
482 | /* Remember delta applied to import section. */ | |
483 | import_delta_rva = dst_section->VirtualAddress - import_section->VirtualAddress; | |
484 | COPY_CHUNK | |
485 | ("Relocating import directory", | |
486 | OFFSET_TO_PTR (import_section->PointerToRawData, p_infile), | |
487 | import_section->SizeOfRawData); | |
488 | ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment); | |
489 | dst_section++; | |
490 | } | |
491 | if (reloc_section != NULL) | |
492 | { | |
493 | dst_nt_header->FileHeader.NumberOfSections++; | |
494 | dst_nt_header->OptionalHeader.SizeOfImage += | |
495 | ROUND_UP (reloc_section->Misc.VirtualSize, | |
496 | dst_nt_header->OptionalHeader.SectionAlignment); | |
497 | *dst_section = *reloc_section; | |
498 | dst_section->VirtualAddress = | |
499 | dst_section[-1].VirtualAddress | |
500 | + ROUND_UP (dst_section[-1].Misc.VirtualSize, | |
501 | dst_nt_header->OptionalHeader.SectionAlignment); | |
502 | dst_section->PointerToRawData = DST_TO_OFFSET (); | |
503 | /* Remember delta applied to reloc section. */ | |
504 | reloc_delta_rva = dst_section->VirtualAddress - reloc_section->VirtualAddress; | |
505 | COPY_CHUNK | |
506 | ("Relocating base relocations directory", | |
507 | OFFSET_TO_PTR (reloc_section->PointerToRawData, p_infile), | |
508 | reloc_section->SizeOfRawData); | |
509 | ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment); | |
510 | reloc_dir = &dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC]; | |
511 | reloc_dir->VirtualAddress += reloc_delta_rva; | |
512 | dst_section++; | |
513 | } | |
514 | ||
515 | /* Copy remainder of source image. */ | |
516 | section--; | |
517 | offset = ROUND_UP (section->PointerToRawData + section->SizeOfRawData, | |
518 | nt_header->OptionalHeader.FileAlignment); | |
519 | COPY_CHUNK | |
520 | ("Copying remainder of executable...", | |
521 | OFFSET_TO_PTR (offset, p_infile), | |
522 | p_infile->size - offset); | |
523 | ||
524 | /* Final size for new image. */ | |
525 | p_outfile->size = DST_TO_OFFSET (); | |
526 | ||
527 | /* Now patch up remaining file-relative offsets. */ | |
528 | printf ("Patching up raw data offsets...\n"); | |
529 | ||
530 | section = IMAGE_FIRST_SECTION (nt_header); | |
531 | dst_section = IMAGE_FIRST_SECTION (dst_nt_header); | |
532 | ||
533 | #define ADJUST_OFFSET(var) \ | |
534 | do { \ | |
535 | if ((var) != 0) \ | |
536 | (var) = relocate_offset ((var), nt_header, dst_nt_header); \ | |
537 | } while (0) | |
538 | ||
539 | #define ADJUST_IMPORT_RVA(var) \ | |
540 | do { \ | |
541 | if ((var) != 0) \ | |
542 | *((DWORD *)&(var)) += import_delta_rva; \ | |
543 | } while (0) | |
544 | ||
545 | dst_nt_header->OptionalHeader.SizeOfInitializedData = 0; | |
546 | dst_nt_header->OptionalHeader.SizeOfUninitializedData = 0; | |
547 | for (i = 0; i < dst_nt_header->FileHeader.NumberOfSections; i++) | |
548 | { | |
549 | /* Recompute data sizes for completeness. */ | |
550 | if (dst_section[i].Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA) | |
551 | dst_nt_header->OptionalHeader.SizeOfInitializedData += | |
552 | ROUND_UP (dst_section[i].Misc.VirtualSize, dst_nt_header->OptionalHeader.FileAlignment); | |
553 | else if (dst_section[i].Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) | |
554 | dst_nt_header->OptionalHeader.SizeOfUninitializedData += | |
555 | ROUND_UP (dst_section[i].Misc.VirtualSize, dst_nt_header->OptionalHeader.FileAlignment); | |
556 | ||
557 | ADJUST_OFFSET (dst_section[i].PointerToLinenumbers); | |
558 | } | |
559 | ||
560 | ADJUST_OFFSET (dst_nt_header->FileHeader.PointerToSymbolTable); | |
561 | ||
562 | /* Update offsets in debug directory entries. Note that the debug | |
563 | directory may be in the same section as the import table, so its | |
564 | RVA may need to be adjusted too. */ | |
565 | { | |
566 | PIMAGE_DATA_DIRECTORY debug_dir = | |
567 | &dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG]; | |
568 | PIMAGE_DEBUG_DIRECTORY debug_entry; | |
569 | ||
570 | /* Update debug_dir if part of import_section. */ | |
571 | if (rva_to_section (debug_dir->VirtualAddress, nt_header) == import_section) | |
572 | debug_dir->VirtualAddress += import_delta_rva; | |
573 | ||
574 | section = rva_to_section (debug_dir->VirtualAddress, dst_nt_header); | |
575 | if (section) | |
576 | { | |
577 | int size; | |
578 | ||
579 | debug_entry = RVA_TO_PTR (debug_dir->VirtualAddress, section, p_outfile); | |
580 | size = debug_dir->Size / sizeof (IMAGE_DEBUG_DIRECTORY); | |
581 | ||
582 | for (i = 0; i < size; i++, debug_entry++) | |
583 | { | |
584 | /* The debug data itself is normally not part of any | |
585 | section, but stored after all the raw section data. So | |
586 | let relocate_offset do the work. */ | |
587 | ADJUST_OFFSET (debug_entry->PointerToRawData); | |
588 | ADJUST_IMPORT_RVA (debug_entry->AddressOfRawData); | |
589 | } | |
590 | } | |
591 | } | |
592 | ||
593 | /* Update RVAs in import directory entries. */ | |
594 | { | |
595 | PIMAGE_IMPORT_DESCRIPTOR imports; | |
596 | PIMAGE_THUNK_DATA import_thunks; | |
597 | ||
598 | import_dir = &dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IMPORT]; | |
599 | import_dir->VirtualAddress += import_delta_rva; | |
600 | ||
601 | section = rva_to_section (import_dir->VirtualAddress, dst_nt_header); | |
602 | imports = RVA_TO_PTR (import_dir->VirtualAddress, section, p_outfile); | |
603 | ||
604 | for ( ; imports->Name != 0; imports++) | |
605 | { | |
606 | ADJUST_IMPORT_RVA (imports->OriginalFirstThunk); | |
607 | ADJUST_IMPORT_RVA (imports->FirstThunk); | |
608 | ADJUST_IMPORT_RVA (imports->Name); | |
609 | ||
610 | for (import_thunks = RVA_TO_PTR (imports->OriginalFirstThunk, section, p_outfile); | |
611 | import_thunks->u1.Function != 0; | |
612 | import_thunks++) | |
613 | if ((import_thunks->u1.Ordinal >> 31) == 0) | |
614 | ADJUST_IMPORT_RVA (import_thunks->u1.Ordinal); | |
615 | ||
616 | for (import_thunks = RVA_TO_PTR (imports->FirstThunk, section, p_outfile); | |
617 | import_thunks->u1.Function != 0; | |
618 | import_thunks++) | |
619 | if ((import_thunks->u1.Ordinal >> 31) == 0) | |
620 | ADJUST_IMPORT_RVA (import_thunks->u1.Ordinal); | |
621 | } | |
622 | ||
623 | import_dir = &dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_IAT]; | |
624 | import_dir->VirtualAddress += import_delta_rva; | |
625 | } | |
626 | ||
627 | /* Fix up references to the import section. */ | |
628 | printf ("Applying fixups to import references...\n"); | |
629 | ||
630 | { | |
631 | IMAGE_BASE_RELOCATION *relocs, *block, *start_block, *end_block; | |
632 | DWORD import_start = import_section->VirtualAddress + dst_nt_header->OptionalHeader.ImageBase; | |
633 | DWORD import_end = import_start + import_section->Misc.VirtualSize; | |
634 | DWORD len_import_relocs; | |
635 | DWORD len_remaining_relocs; | |
636 | int seen_high = 0; | |
637 | WORD * high_word; | |
638 | void * holder; | |
639 | ||
640 | reloc_dir = &dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_BASERELOC]; | |
641 | reloc_section = rva_to_section (reloc_dir->VirtualAddress, dst_nt_header); | |
642 | relocs = RVA_TO_PTR (reloc_dir->VirtualAddress, reloc_section, p_outfile); | |
643 | ||
644 | /* Move the base relocations for the import section, if there are | |
645 | any; the profiler needs to be able to patch RVAs in the import | |
646 | section itself. */ | |
647 | for (block = relocs, start_block = 0; | |
648 | (DWORD) block - (DWORD) relocs < reloc_dir->Size; | |
649 | block = (void *)((DWORD) block + block->SizeOfBlock)) | |
650 | { | |
651 | if (block->VirtualAddress >= import_section->VirtualAddress + import_section->Misc.VirtualSize) | |
652 | { | |
653 | end_block = block; | |
654 | break; | |
655 | } | |
656 | if (block->VirtualAddress >= import_section->VirtualAddress) | |
657 | { | |
658 | if (start_block == 0) | |
659 | start_block = block; | |
660 | block->VirtualAddress += import_delta_rva; | |
661 | } | |
662 | } | |
663 | if (start_block) | |
664 | { | |
665 | len_import_relocs = (DWORD) end_block - (DWORD) start_block; | |
666 | len_remaining_relocs = (DWORD) relocs + reloc_dir->Size - (DWORD) end_block; | |
667 | holder = malloc (len_import_relocs); | |
668 | if (holder == 0) | |
669 | abort (); | |
670 | memcpy (holder, start_block, len_import_relocs); | |
671 | memcpy (start_block, end_block, len_remaining_relocs); | |
672 | memcpy ((char *) start_block + len_remaining_relocs, holder, len_import_relocs); | |
673 | free (holder); | |
674 | } | |
675 | ||
676 | /* Walk up the list of base relocations, checking for references | |
677 | to the old import section location, and patching them to | |
678 | reference the new location. */ | |
679 | for (block = relocs; | |
680 | (DWORD) block - (DWORD) relocs < reloc_dir->Size; | |
681 | block = (void *)((DWORD) block + block->SizeOfBlock)) | |
682 | { | |
683 | DWORD page_rva = block->VirtualAddress; | |
684 | DWORD page_offset; | |
685 | union { | |
686 | WORD word; | |
687 | DWORD dword; | |
688 | } * ploc; | |
689 | WORD *fixup; | |
690 | ||
691 | section = rva_to_section (page_rva, dst_nt_header); | |
692 | /* Don't apply fixups to the blanked sections. */ | |
693 | if (section->Name[0] == 'X') | |
694 | continue; | |
695 | ||
696 | for (fixup = (WORD *) &block[1]; | |
697 | (DWORD) fixup - (DWORD) block < block->SizeOfBlock; | |
698 | fixup++) | |
699 | { | |
700 | page_offset = (*fixup) & 0xfff; | |
701 | ploc = RVA_TO_PTR (page_rva + page_offset, section, p_outfile); | |
702 | ||
703 | /* Unless our assumption is wrong, all low word fixups | |
704 | should immediately follow a high fixup. */ | |
705 | if (seen_high && ((*fixup) >> 12) != IMAGE_REL_BASED_LOW) | |
706 | abort (); | |
707 | ||
708 | switch ((*fixup) >> 12) | |
709 | { | |
710 | case IMAGE_REL_BASED_ABSOLUTE: | |
711 | break; | |
712 | case IMAGE_REL_BASED_HIGH: | |
713 | /* We must assume that high and low fixups occur in | |
714 | pairs, specifically a low fixup immediately follows a | |
715 | high fixup (normally separated by two bytes). We | |
716 | have to process the two fixups together, to find out | |
717 | the full pointer value and decide whether to apply | |
718 | the fixup. */ | |
719 | seen_high = 1; | |
720 | high_word = &ploc->word; | |
721 | break; | |
722 | case IMAGE_REL_BASED_LOW: | |
723 | offset = (*high_word << 16) + ploc->word; | |
724 | if (offset >= import_start && offset < import_end) | |
725 | { | |
726 | (*high_word) += import_delta_rva >> 16; | |
727 | ploc->dword += import_delta_rva & 0xffff; | |
728 | } | |
729 | seen_high = 0; | |
730 | break; | |
731 | case IMAGE_REL_BASED_HIGHLOW: | |
732 | /* Docs imply two words in big-endian order, so perhaps | |
733 | this is only used on big-endian platforms, in which | |
734 | case the obvious code will work. */ | |
735 | if (ploc->dword >= import_start && ploc->dword < import_end) | |
736 | ploc->dword += import_delta_rva; | |
737 | break; | |
738 | case IMAGE_REL_BASED_HIGHADJ: | |
739 | /* Docs don't say, but I guess this is the equivalent | |
740 | for little-endian platforms. */ | |
741 | if (ploc->dword >= import_start && ploc->dword < import_end) | |
742 | ploc->dword += import_delta_rva; | |
743 | break; | |
744 | case IMAGE_REL_BASED_MIPS_JMPADDR: | |
745 | /* Don't know how to handle this; MIPS support has been | |
746 | dropped from NT4 anyway. */ | |
747 | abort (); | |
748 | break; | |
f78b1e5e | 749 | #ifdef IMAGE_REL_BASED_SECTION |
95382f42 AI |
750 | case IMAGE_REL_BASED_SECTION: |
751 | case IMAGE_REL_BASED_REL32: | |
752 | /* Docs don't say what these values mean. */ | |
3102421f AI |
753 | #endif |
754 | default: | |
95382f42 AI |
755 | abort (); |
756 | } | |
757 | } | |
758 | } | |
759 | } | |
760 | } | |
761 | ||
762 | ||
763 | int | |
764 | main (int argc, char **argv) | |
765 | { | |
766 | PIMAGE_DOS_HEADER dos_header; | |
767 | PIMAGE_NT_HEADERS nt_header; | |
768 | file_data in_file, out_file; | |
769 | char out_filename[MAX_PATH], in_filename[MAX_PATH]; | |
770 | char *ptr; | |
771 | ||
772 | strcpy (in_filename, argv[1]); | |
773 | strcpy (out_filename, argv[2]); | |
774 | ||
775 | printf ("Preparing %s for profile prepping\n", out_filename); | |
776 | ||
777 | /* Open the original (dumped) executable file for reference. */ | |
778 | if (!open_input_file (&in_file, in_filename)) | |
779 | { | |
177c0ea7 | 780 | printf ("Failed to open %s (%d)...bailing.\n", |
95382f42 AI |
781 | in_filename, GetLastError ()); |
782 | exit (1); | |
783 | } | |
784 | ||
785 | /* Create a new image that can be prepped; we don't expect the size to | |
786 | change because we are only adding two new section table entries, | |
787 | which should fit in the alignment slop. */ | |
788 | if (!open_output_file (&out_file, out_filename, in_file.size)) | |
789 | { | |
177c0ea7 | 790 | printf ("Failed to open %s (%d)...bailing.\n", |
95382f42 AI |
791 | out_filename, GetLastError ()); |
792 | exit (1); | |
793 | } | |
794 | ||
795 | copy_executable_and_move_sections (&in_file, &out_file); | |
796 | ||
797 | /* Patch up header fields; profiler is picky about this. */ | |
798 | { | |
799 | HANDLE hImagehelp = LoadLibrary ("imagehlp.dll"); | |
800 | DWORD headersum; | |
801 | DWORD checksum; | |
802 | ||
803 | dos_header = (PIMAGE_DOS_HEADER) out_file.file_base; | |
804 | nt_header = (PIMAGE_NT_HEADERS) ((char *) dos_header + dos_header->e_lfanew); | |
805 | ||
806 | nt_header->OptionalHeader.CheckSum = 0; | |
807 | // nt_header->FileHeader.TimeDateStamp = time (NULL); | |
808 | // dos_header->e_cp = size / 512; | |
809 | // nt_header->OptionalHeader.SizeOfImage = size; | |
810 | ||
811 | pfnCheckSumMappedFile = (void *) GetProcAddress (hImagehelp, "CheckSumMappedFile"); | |
812 | if (pfnCheckSumMappedFile) | |
813 | { | |
814 | // nt_header->FileHeader.TimeDateStamp = time (NULL); | |
815 | pfnCheckSumMappedFile (out_file.file_base, | |
816 | out_file.size, | |
817 | &headersum, | |
818 | &checksum); | |
819 | nt_header->OptionalHeader.CheckSum = checksum; | |
820 | } | |
821 | FreeLibrary (hImagehelp); | |
822 | } | |
823 | ||
824 | close_file_data (&out_file); | |
825 | close_file_data (&in_file); | |
826 | ||
827 | return 0; | |
828 | } | |
829 | ||
830 | /* eof */ | |
ab5796a9 MB |
831 | |
832 | /* arch-tag: 144ca747-168e-43a0-9736-3f4c0ba1657f | |
833 | (do not change this comment) */ |