Commit | Line | Data |
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3b7ad313 | 1 | /* unexec for GNU Emacs on Windows NT. |
ab422c4d | 2 | Copyright (C) 1994, 2001-2013 Free Software Foundation, Inc. |
2147fb50 | 3 | |
3b7ad313 | 4 | This file is part of GNU Emacs. |
2147fb50 | 5 | |
9ec0b715 | 6 | GNU Emacs is free software: you can redistribute it and/or modify |
3b7ad313 | 7 | it under the terms of the GNU General Public License as published by |
9ec0b715 GM |
8 | the Free Software Foundation, either version 3 of the License, or |
9 | (at your option) any later version. | |
2147fb50 | 10 | |
3b7ad313 EN |
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. | |
2147fb50 | 15 | |
3b7ad313 | 16 | You should have received a copy of the GNU General Public License |
9ec0b715 | 17 | along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ |
2147fb50 | 18 | |
9ec0b715 | 19 | /* |
2147fb50 KH |
20 | Geoff Voelker (voelker@cs.washington.edu) 8-12-94 |
21 | */ | |
22 | ||
43640c4d | 23 | #include <config.h> |
ce701a33 | 24 | #include "unexec.h" |
a68089e4 | 25 | #include "lisp.h" |
501199a3 | 26 | #include "w32common.h" |
a68089e4 | 27 | #include "w32.h" |
43640c4d | 28 | |
2147fb50 KH |
29 | #include <stdio.h> |
30 | #include <fcntl.h> | |
43640c4d | 31 | #include <time.h> |
2147fb50 KH |
32 | #include <windows.h> |
33 | ||
43640c4d GV |
34 | /* Include relevant definitions from IMAGEHLP.H, which can be found |
35 | in \\win32sdk\mstools\samples\image\include\imagehlp.h. */ | |
2147fb50 | 36 | |
43640c4d GV |
37 | PIMAGE_NT_HEADERS |
38 | (__stdcall * pfnCheckSumMappedFile) (LPVOID BaseAddress, | |
39 | DWORD FileLength, | |
40 | LPDWORD HeaderSum, | |
41 | LPDWORD CheckSum); | |
2147fb50 | 42 | |
43640c4d GV |
43 | extern BOOL ctrl_c_handler (unsigned long type); |
44 | ||
45 | extern char my_begdata[]; | |
46 | extern char my_edata[]; | |
47 | extern char my_begbss[]; | |
48 | extern char my_endbss[]; | |
9c8056fe GV |
49 | extern char *my_begbss_static; |
50 | extern char *my_endbss_static; | |
2147fb50 | 51 | |
43640c4d | 52 | #include "w32heap.h" |
e54c8cd1 | 53 | |
03887dd3 KH |
54 | #undef min |
55 | #undef max | |
56 | #define min(x, y) (((x) < (y)) ? (x) : (y)) | |
57 | #define max(x, y) (((x) > (y)) ? (x) : (y)) | |
58 | ||
2147fb50 | 59 | /* Basically, our "initialized" flag. */ |
5b79dba5 | 60 | BOOL using_dynamic_heap = FALSE; |
2147fb50 | 61 | |
43640c4d GV |
62 | int open_input_file (file_data *p_file, char *name); |
63 | int open_output_file (file_data *p_file, char *name, unsigned long size); | |
2147fb50 KH |
64 | void close_file_data (file_data *p_file); |
65 | ||
66 | void get_section_info (file_data *p_file); | |
5b79dba5 | 67 | void copy_executable_and_dump_data (file_data *, file_data *); |
2147fb50 KH |
68 | void dump_bss_and_heap (file_data *p_infile, file_data *p_outfile); |
69 | ||
70 | /* Cached info about the .data section in the executable. */ | |
5b79dba5 | 71 | PIMAGE_SECTION_HEADER data_section; |
49dc9682 | 72 | PCHAR data_start = 0; |
62aba0d4 | 73 | DWORD_PTR data_size = 0; |
2147fb50 KH |
74 | |
75 | /* Cached info about the .bss section in the executable. */ | |
5b79dba5 | 76 | PIMAGE_SECTION_HEADER bss_section; |
49dc9682 | 77 | PCHAR bss_start = 0; |
62aba0d4 FP |
78 | DWORD_PTR bss_size = 0; |
79 | DWORD_PTR extra_bss_size = 0; | |
5b79dba5 AI |
80 | /* bss data that is static might be discontiguous from non-static. */ |
81 | PIMAGE_SECTION_HEADER bss_section_static; | |
49dc9682 | 82 | PCHAR bss_start_static = 0; |
62aba0d4 FP |
83 | DWORD_PTR bss_size_static = 0; |
84 | DWORD_PTR extra_bss_size_static = 0; | |
5b79dba5 AI |
85 | |
86 | PIMAGE_SECTION_HEADER heap_section; | |
2147fb50 KH |
87 | |
88 | /* Startup code for running on NT. When we are running as the dumped | |
89 | version, we need to bootstrap our heap and .bss section into our | |
90 | address space before we can actually hand off control to the startup | |
91 | code supplied by NT (primarily because that code relies upon malloc ()). */ | |
92 | void | |
93 | _start (void) | |
94 | { | |
95 | extern void mainCRTStartup (void); | |
96 | ||
7fef47a3 | 97 | #if 1 |
43640c4d GV |
98 | /* Give us a way to debug problems with crashes on startup when |
99 | running under the MSVC profiler. */ | |
100 | if (GetEnvironmentVariable ("EMACS_DEBUG", NULL, 0) > 0) | |
101 | DebugBreak (); | |
102 | #endif | |
103 | ||
2147fb50 KH |
104 | /* Cache system info, e.g., the NT page size. */ |
105 | cache_system_info (); | |
106 | ||
5b79dba5 AI |
107 | /* Grab our malloc arena space now, before CRT starts up. */ |
108 | init_heap (); | |
2147fb50 | 109 | |
2147fb50 KH |
110 | /* This prevents ctrl-c's in shells running while we're suspended from |
111 | having us exit. */ | |
112 | SetConsoleCtrlHandler ((PHANDLER_ROUTINE) ctrl_c_handler, TRUE); | |
113 | ||
467af476 AI |
114 | /* Prevent Emacs from being locked up (eg. in batch mode) when |
115 | accessing devices that aren't mounted (eg. removable media drives). */ | |
116 | SetErrorMode (SEM_FAILCRITICALERRORS); | |
2147fb50 KH |
117 | mainCRTStartup (); |
118 | } | |
119 | ||
2147fb50 KH |
120 | |
121 | /* File handling. */ | |
122 | ||
43640c4d | 123 | int |
2147fb50 KH |
124 | open_input_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, FILE_SHARE_READ, NULL, | |
132 | OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); | |
177c0ea7 | 133 | if (file == INVALID_HANDLE_VALUE) |
43640c4d | 134 | return FALSE; |
2147fb50 KH |
135 | |
136 | size = GetFileSize (file, &upper_size); | |
177c0ea7 | 137 | file_mapping = CreateFileMapping (file, NULL, PAGE_READONLY, |
2147fb50 | 138 | 0, size, NULL); |
177c0ea7 | 139 | if (!file_mapping) |
43640c4d | 140 | return FALSE; |
2147fb50 KH |
141 | |
142 | file_base = MapViewOfFile (file_mapping, FILE_MAP_READ, 0, 0, size); | |
177c0ea7 | 143 | if (file_base == 0) |
43640c4d | 144 | return FALSE; |
2147fb50 KH |
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; | |
43640c4d GV |
151 | |
152 | return TRUE; | |
2147fb50 KH |
153 | } |
154 | ||
43640c4d | 155 | int |
2147fb50 KH |
156 | open_output_file (file_data *p_file, char *filename, unsigned long size) |
157 | { | |
158 | HANDLE file; | |
159 | HANDLE file_mapping; | |
160 | void *file_base; | |
cd6885f3 | 161 | |
2147fb50 KH |
162 | file = CreateFile (filename, GENERIC_READ | GENERIC_WRITE, 0, NULL, |
163 | CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0); | |
177c0ea7 | 164 | if (file == INVALID_HANDLE_VALUE) |
43640c4d GV |
165 | return FALSE; |
166 | ||
177c0ea7 | 167 | file_mapping = CreateFileMapping (file, NULL, PAGE_READWRITE, |
2147fb50 | 168 | 0, size, NULL); |
177c0ea7 | 169 | if (!file_mapping) |
43640c4d | 170 | return FALSE; |
177c0ea7 | 171 | |
2147fb50 | 172 | file_base = MapViewOfFile (file_mapping, FILE_MAP_WRITE, 0, 0, size); |
177c0ea7 | 173 | if (file_base == 0) |
43640c4d | 174 | return FALSE; |
177c0ea7 | 175 | |
2147fb50 KH |
176 | p_file->name = filename; |
177 | p_file->size = size; | |
178 | p_file->file = file; | |
179 | p_file->file_mapping = file_mapping; | |
180 | p_file->file_base = file_base; | |
43640c4d GV |
181 | |
182 | return TRUE; | |
2147fb50 KH |
183 | } |
184 | ||
185 | /* Close the system structures associated with the given file. */ | |
43640c4d | 186 | void |
2147fb50 KH |
187 | close_file_data (file_data *p_file) |
188 | { | |
5b79dba5 AI |
189 | UnmapViewOfFile (p_file->file_base); |
190 | CloseHandle (p_file->file_mapping); | |
191 | /* For the case of output files, set final size. */ | |
192 | SetFilePointer (p_file->file, p_file->size, NULL, FILE_BEGIN); | |
193 | SetEndOfFile (p_file->file); | |
194 | CloseHandle (p_file->file); | |
2147fb50 KH |
195 | } |
196 | ||
197 | ||
198 | /* Routines to manipulate NT executable file sections. */ | |
199 | ||
43640c4d GV |
200 | /* Return pointer to section header for named section. */ |
201 | IMAGE_SECTION_HEADER * | |
202 | find_section (char * name, IMAGE_NT_HEADERS * nt_header) | |
203 | { | |
204 | PIMAGE_SECTION_HEADER section; | |
205 | int i; | |
206 | ||
207 | section = IMAGE_FIRST_SECTION (nt_header); | |
208 | ||
209 | for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++) | |
210 | { | |
211 | if (strcmp (section->Name, name) == 0) | |
212 | return section; | |
213 | section++; | |
214 | } | |
215 | return NULL; | |
216 | } | |
217 | ||
218 | /* Return pointer to section header for section containing the given | |
219 | relative virtual address. */ | |
220 | IMAGE_SECTION_HEADER * | |
62aba0d4 | 221 | rva_to_section (DWORD_PTR rva, IMAGE_NT_HEADERS * nt_header) |
43640c4d GV |
222 | { |
223 | PIMAGE_SECTION_HEADER section; | |
224 | int i; | |
225 | ||
226 | section = IMAGE_FIRST_SECTION (nt_header); | |
227 | ||
228 | for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++) | |
2147fb50 | 229 | { |
5b79dba5 AI |
230 | /* Some linkers (eg. the NT SDK linker I believe) swapped the |
231 | meaning of these two values - or rather, they ignored | |
232 | VirtualSize entirely and always set it to zero. This affects | |
233 | some very old exes (eg. gzip dated Dec 1993). Since | |
234 | w32_executable_type relies on this function to work reliably, | |
235 | we need to cope with this. */ | |
62aba0d4 | 236 | DWORD_PTR real_size = max (section->SizeOfRawData, |
5b79dba5 | 237 | section->Misc.VirtualSize); |
43640c4d | 238 | if (rva >= section->VirtualAddress |
5b79dba5 AI |
239 | && rva < section->VirtualAddress + real_size) |
240 | return section; | |
241 | section++; | |
242 | } | |
243 | return NULL; | |
244 | } | |
245 | ||
246 | /* Return pointer to section header for section containing the given | |
247 | offset in its raw data area. */ | |
248 | IMAGE_SECTION_HEADER * | |
62aba0d4 | 249 | offset_to_section (DWORD_PTR offset, IMAGE_NT_HEADERS * nt_header) |
5b79dba5 AI |
250 | { |
251 | PIMAGE_SECTION_HEADER section; | |
252 | int i; | |
253 | ||
254 | section = IMAGE_FIRST_SECTION (nt_header); | |
255 | ||
256 | for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++) | |
257 | { | |
258 | if (offset >= section->PointerToRawData | |
259 | && offset < section->PointerToRawData + section->SizeOfRawData) | |
43640c4d GV |
260 | return section; |
261 | section++; | |
2147fb50 | 262 | } |
43640c4d | 263 | return NULL; |
2147fb50 KH |
264 | } |
265 | ||
5b79dba5 AI |
266 | /* Return offset to an object in dst, given offset in src. We assume |
267 | there is at least one section in both src and dst images, and that | |
268 | the some sections may have been added to dst (after sections in src). */ | |
62aba0d4 FP |
269 | DWORD_PTR |
270 | relocate_offset (DWORD_PTR offset, | |
5b79dba5 AI |
271 | IMAGE_NT_HEADERS * src_nt_header, |
272 | IMAGE_NT_HEADERS * dst_nt_header) | |
273 | { | |
274 | PIMAGE_SECTION_HEADER src_section = IMAGE_FIRST_SECTION (src_nt_header); | |
275 | PIMAGE_SECTION_HEADER dst_section = IMAGE_FIRST_SECTION (dst_nt_header); | |
276 | int i = 0; | |
277 | ||
278 | while (offset >= src_section->PointerToRawData) | |
279 | { | |
280 | if (offset < src_section->PointerToRawData + src_section->SizeOfRawData) | |
281 | break; | |
282 | i++; | |
283 | if (i == src_nt_header->FileHeader.NumberOfSections) | |
284 | { | |
285 | /* Handle offsets after the last section. */ | |
286 | dst_section = IMAGE_FIRST_SECTION (dst_nt_header); | |
287 | dst_section += dst_nt_header->FileHeader.NumberOfSections - 1; | |
288 | while (dst_section->PointerToRawData == 0) | |
289 | dst_section--; | |
290 | while (src_section->PointerToRawData == 0) | |
291 | src_section--; | |
292 | return offset | |
293 | + (dst_section->PointerToRawData + dst_section->SizeOfRawData) | |
294 | - (src_section->PointerToRawData + src_section->SizeOfRawData); | |
295 | } | |
296 | src_section++; | |
297 | dst_section++; | |
298 | } | |
299 | return offset + | |
300 | (dst_section->PointerToRawData - src_section->PointerToRawData); | |
301 | } | |
302 | ||
303 | #define OFFSET_TO_RVA(offset, section) \ | |
2d7d1608 | 304 | ((section)->VirtualAddress + ((DWORD_PTR)(offset) - (section)->PointerToRawData)) |
5b79dba5 AI |
305 | |
306 | #define RVA_TO_OFFSET(rva, section) \ | |
2d7d1608 | 307 | ((section)->PointerToRawData + ((DWORD_PTR)(rva) - (section)->VirtualAddress)) |
5b79dba5 AI |
308 | |
309 | #define RVA_TO_SECTION_OFFSET(rva, section) \ | |
2d7d1608 | 310 | ((DWORD_PTR)(rva) - (section)->VirtualAddress) |
5b79dba5 AI |
311 | |
312 | /* Convert address in executing image to RVA. */ | |
62aba0d4 | 313 | #define PTR_TO_RVA(ptr) ((DWORD_PTR)(ptr) - (DWORD_PTR) GetModuleHandle (NULL)) |
5b79dba5 | 314 | |
e9bdb9c9 | 315 | #define RVA_TO_PTR(var,section,filedata) \ |
2d7d1608 | 316 | ((unsigned char *)(RVA_TO_OFFSET (var,section) + (filedata).file_base)) |
e9bdb9c9 | 317 | |
5b79dba5 | 318 | #define PTR_TO_OFFSET(ptr, pfile_data) \ |
49dc9682 | 319 | ((unsigned char *)(ptr) - (pfile_data)->file_base) |
5b79dba5 AI |
320 | |
321 | #define OFFSET_TO_PTR(offset, pfile_data) \ | |
62aba0d4 | 322 | ((pfile_data)->file_base + (DWORD_PTR)(offset)) |
5b79dba5 | 323 | |
43640c4d | 324 | |
2147fb50 | 325 | /* Flip through the executable and cache the info necessary for dumping. */ |
49dc9682 | 326 | void |
2147fb50 KH |
327 | get_section_info (file_data *p_infile) |
328 | { | |
329 | PIMAGE_DOS_HEADER dos_header; | |
330 | PIMAGE_NT_HEADERS nt_header; | |
5b79dba5 | 331 | int overlap; |
177c0ea7 | 332 | |
2147fb50 | 333 | dos_header = (PIMAGE_DOS_HEADER) p_infile->file_base; |
177c0ea7 | 334 | if (dos_header->e_magic != IMAGE_DOS_SIGNATURE) |
2147fb50 KH |
335 | { |
336 | printf ("Unknown EXE header in %s...bailing.\n", p_infile->name); | |
337 | exit (1); | |
338 | } | |
62aba0d4 | 339 | nt_header = (PIMAGE_NT_HEADERS) (((DWORD_PTR) dos_header) + |
2147fb50 | 340 | dos_header->e_lfanew); |
177c0ea7 | 341 | if (nt_header == NULL) |
2147fb50 | 342 | { |
177c0ea7 | 343 | printf ("Failed to find IMAGE_NT_HEADER in %s...bailing.\n", |
2147fb50 KH |
344 | p_infile->name); |
345 | exit (1); | |
346 | } | |
347 | ||
348 | /* Check the NT header signature ... */ | |
177c0ea7 | 349 | if (nt_header->Signature != IMAGE_NT_SIGNATURE) |
2147fb50 KH |
350 | { |
351 | printf ("Invalid IMAGE_NT_SIGNATURE 0x%x in %s...bailing.\n", | |
352 | nt_header->Signature, p_infile->name); | |
5b79dba5 | 353 | exit (1); |
2147fb50 KH |
354 | } |
355 | ||
5b79dba5 AI |
356 | /* Locate the ".data" and ".bss" sections for Emacs. (Note that the |
357 | actual section names are probably different from these, and might | |
358 | actually be the same section.) | |
359 | ||
360 | We do this as follows: first we determine the virtual address | |
361 | ranges in this process for the data and bss variables that we wish | |
362 | to preserve. Then we map these VAs to the section entries in the | |
363 | source image. Finally, we determine the new size of the raw data | |
364 | area for the bss section, so we can make the new image the correct | |
365 | size. */ | |
366 | ||
e3ddd18c AI |
367 | /* We arrange for the Emacs initialized data to be in a separate |
368 | section if possible, because we cannot rely on my_begdata and | |
369 | my_edata marking out the full extent of the initialized data, at | |
370 | least on the Alpha where the linker freely reorders variables | |
371 | across libraries. If we can arrange for this, all we need to do is | |
372 | find the start and size of the EMDATA section. */ | |
373 | data_section = find_section ("EMDATA", nt_header); | |
374 | if (data_section) | |
2147fb50 | 375 | { |
e3ddd18c AI |
376 | data_start = (char *) nt_header->OptionalHeader.ImageBase + |
377 | data_section->VirtualAddress; | |
378 | data_size = data_section->Misc.VirtualSize; | |
379 | } | |
380 | else | |
381 | { | |
382 | /* Fallback on the old method if compiler doesn't support the | |
383 | data_set #pragma (or its equivalent). */ | |
384 | data_start = my_begdata; | |
385 | data_size = my_edata - my_begdata; | |
386 | data_section = rva_to_section (PTR_TO_RVA (my_begdata), nt_header); | |
387 | if (data_section != rva_to_section (PTR_TO_RVA (my_edata), nt_header)) | |
388 | { | |
389 | printf ("Initialized data is not in a single section...bailing\n"); | |
390 | exit (1); | |
391 | } | |
5b79dba5 AI |
392 | } |
393 | ||
394 | /* As noted in lastfile.c, the Alpha (but not the Intel) MSVC linker | |
395 | globally segregates all static and public bss data (ie. across all | |
396 | linked modules, not just per module), so we must take both static | |
397 | and public bss areas into account to determine the true extent of | |
398 | the bss area used by Emacs. | |
399 | ||
400 | To be strictly correct, we dump the static and public bss areas | |
401 | used by Emacs separately if non-overlapping (since otherwise we are | |
402 | dumping bss data belonging to system libraries, eg. the static bss | |
403 | system data on the Alpha). */ | |
404 | ||
405 | bss_start = my_begbss; | |
406 | bss_size = my_endbss - my_begbss; | |
407 | bss_section = rva_to_section (PTR_TO_RVA (my_begbss), nt_header); | |
408 | if (bss_section != rva_to_section (PTR_TO_RVA (my_endbss), nt_header)) | |
409 | { | |
410 | printf ("Uninitialized data is not in a single section...bailing\n"); | |
411 | exit (1); | |
412 | } | |
413 | /* Compute how much the .bss section's raw data will grow. */ | |
414 | extra_bss_size = | |
415 | ROUND_UP (RVA_TO_SECTION_OFFSET (PTR_TO_RVA (my_endbss), bss_section), | |
416 | nt_header->OptionalHeader.FileAlignment) | |
417 | - bss_section->SizeOfRawData; | |
418 | ||
419 | bss_start_static = my_begbss_static; | |
420 | bss_size_static = my_endbss_static - my_begbss_static; | |
421 | bss_section_static = rva_to_section (PTR_TO_RVA (my_begbss_static), nt_header); | |
422 | if (bss_section_static != rva_to_section (PTR_TO_RVA (my_endbss_static), nt_header)) | |
423 | { | |
424 | printf ("Uninitialized static data is not in a single section...bailing\n"); | |
425 | exit (1); | |
426 | } | |
427 | /* Compute how much the static .bss section's raw data will grow. */ | |
428 | extra_bss_size_static = | |
429 | ROUND_UP (RVA_TO_SECTION_OFFSET (PTR_TO_RVA (my_endbss_static), bss_section_static), | |
430 | nt_header->OptionalHeader.FileAlignment) | |
431 | - bss_section_static->SizeOfRawData; | |
432 | ||
433 | /* Combine the bss sections into one if they overlap. */ | |
972ee7e0 AI |
434 | #ifdef _ALPHA_ |
435 | overlap = 1; /* force all bss data to be dumped */ | |
436 | #else | |
5b79dba5 | 437 | overlap = 0; |
972ee7e0 | 438 | #endif |
5b79dba5 AI |
439 | if (bss_start < bss_start_static) |
440 | { | |
441 | if (bss_start_static < bss_start + bss_size) | |
442 | overlap = 1; | |
443 | } | |
444 | else | |
445 | { | |
446 | if (bss_start < bss_start_static + bss_size_static) | |
447 | overlap = 1; | |
448 | } | |
449 | if (overlap) | |
450 | { | |
451 | if (bss_section != bss_section_static) | |
2147fb50 | 452 | { |
5b79dba5 AI |
453 | printf ("BSS data not in a single section...bailing\n"); |
454 | exit (1); | |
2147fb50 | 455 | } |
5b79dba5 AI |
456 | bss_start = min (bss_start, bss_start_static); |
457 | bss_size = max (my_endbss, my_endbss_static) - bss_start; | |
458 | bss_section_static = 0; | |
459 | extra_bss_size_static = 0; | |
460 | } | |
461 | ||
462 | heap_section = rva_to_section (PTR_TO_RVA (get_heap_start ()), nt_header); | |
463 | } | |
464 | ||
465 | ||
466 | /* The dump routines. */ | |
467 | ||
49dc9682 | 468 | void |
177c0ea7 | 469 | copy_executable_and_dump_data (file_data *p_infile, |
5b79dba5 AI |
470 | file_data *p_outfile) |
471 | { | |
472 | unsigned char *dst, *dst_save; | |
473 | PIMAGE_DOS_HEADER dos_header; | |
474 | PIMAGE_NT_HEADERS nt_header; | |
475 | PIMAGE_NT_HEADERS dst_nt_header; | |
476 | PIMAGE_SECTION_HEADER section; | |
477 | PIMAGE_SECTION_HEADER dst_section; | |
62aba0d4 | 478 | DWORD_PTR offset; |
5b79dba5 | 479 | int i; |
4162f25f | 480 | int be_verbose = GetEnvironmentVariable ("DEBUG_DUMP", NULL, 0) > 0; |
5b79dba5 | 481 | |
4162f25f | 482 | #define COPY_CHUNK(message, src, size, verbose) \ |
5b79dba5 AI |
483 | do { \ |
484 | unsigned char *s = (void *)(src); \ | |
485 | unsigned long count = (size); \ | |
4162f25f EZ |
486 | if (verbose) \ |
487 | { \ | |
488 | printf ("%s\n", (message)); \ | |
489 | printf ("\t0x%08x Offset in input file.\n", s - p_infile->file_base); \ | |
490 | printf ("\t0x%08x Offset in output file.\n", dst - p_outfile->file_base); \ | |
491 | printf ("\t0x%08x Size in bytes.\n", count); \ | |
492 | } \ | |
5b79dba5 AI |
493 | memcpy (dst, s, count); \ |
494 | dst += count; \ | |
495 | } while (0) | |
496 | ||
4162f25f | 497 | #define COPY_PROC_CHUNK(message, src, size, verbose) \ |
5b79dba5 AI |
498 | do { \ |
499 | unsigned char *s = (void *)(src); \ | |
500 | unsigned long count = (size); \ | |
4162f25f EZ |
501 | if (verbose) \ |
502 | { \ | |
503 | printf ("%s\n", (message)); \ | |
504 | printf ("\t0x%08x Address in process.\n", s); \ | |
505 | printf ("\t0x%08x Offset in output file.\n", dst - p_outfile->file_base); \ | |
506 | printf ("\t0x%08x Size in bytes.\n", count); \ | |
507 | } \ | |
5b79dba5 AI |
508 | memcpy (dst, s, count); \ |
509 | dst += count; \ | |
510 | } while (0) | |
511 | ||
512 | #define DST_TO_OFFSET() PTR_TO_OFFSET (dst, p_outfile) | |
513 | #define ROUND_UP_DST(align) \ | |
514 | (dst = p_outfile->file_base + ROUND_UP (DST_TO_OFFSET (), (align))) | |
7fef47a3 AI |
515 | #define ROUND_UP_DST_AND_ZERO(align) \ |
516 | do { \ | |
517 | unsigned char *newdst = p_outfile->file_base \ | |
518 | + ROUND_UP (DST_TO_OFFSET (), (align)); \ | |
519 | /* Zero the alignment slop; it may actually initialize real data. */ \ | |
520 | memset (dst, 0, newdst - dst); \ | |
521 | dst = newdst; \ | |
522 | } while (0) | |
5b79dba5 AI |
523 | |
524 | /* Copy the source image sequentially, ie. section by section after | |
525 | copying the headers and section table, to simplify the process of | |
526 | dumping the raw data for the bss and heap sections. | |
527 | ||
528 | Note that dst is updated implicitly by each COPY_CHUNK. */ | |
529 | ||
530 | dos_header = (PIMAGE_DOS_HEADER) p_infile->file_base; | |
62aba0d4 | 531 | nt_header = (PIMAGE_NT_HEADERS) (((DWORD_PTR) dos_header) + |
5b79dba5 AI |
532 | dos_header->e_lfanew); |
533 | section = IMAGE_FIRST_SECTION (nt_header); | |
177c0ea7 | 534 | |
5b79dba5 AI |
535 | dst = (unsigned char *) p_outfile->file_base; |
536 | ||
537 | COPY_CHUNK ("Copying DOS header...", dos_header, | |
62aba0d4 | 538 | (DWORD_PTR) nt_header - (DWORD_PTR) dos_header, be_verbose); |
5b79dba5 AI |
539 | dst_nt_header = (PIMAGE_NT_HEADERS) dst; |
540 | COPY_CHUNK ("Copying NT header...", nt_header, | |
62aba0d4 | 541 | (DWORD_PTR) section - (DWORD_PTR) nt_header, be_verbose); |
5b79dba5 AI |
542 | dst_section = (PIMAGE_SECTION_HEADER) dst; |
543 | COPY_CHUNK ("Copying section table...", section, | |
4162f25f EZ |
544 | nt_header->FileHeader.NumberOfSections * sizeof (*section), |
545 | be_verbose); | |
5b79dba5 | 546 | |
7fef47a3 AI |
547 | /* Align the first section's raw data area, and set the header size |
548 | field accordingly. */ | |
549 | ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment); | |
550 | dst_nt_header->OptionalHeader.SizeOfHeaders = DST_TO_OFFSET (); | |
551 | ||
5b79dba5 AI |
552 | for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++) |
553 | { | |
554 | char msg[100]; | |
4162f25f EZ |
555 | /* Windows section names are fixed 8-char strings, only |
556 | zero-terminated if the name is shorter than 8 characters. */ | |
557 | sprintf (msg, "Copying raw data for %.8s...", section->Name); | |
5b79dba5 | 558 | |
5b79dba5 AI |
559 | dst_save = dst; |
560 | ||
561 | /* Update the file-relative offset for this section's raw data (if | |
562 | it has any) in case things have been relocated; we will update | |
563 | the other offsets below once we know where everything is. */ | |
564 | if (dst_section->PointerToRawData) | |
565 | dst_section->PointerToRawData = DST_TO_OFFSET (); | |
566 | ||
567 | /* Can always copy the original raw data. */ | |
568 | COPY_CHUNK | |
569 | (msg, OFFSET_TO_PTR (section->PointerToRawData, p_infile), | |
4162f25f | 570 | section->SizeOfRawData, be_verbose); |
7fef47a3 AI |
571 | /* Ensure alignment slop is zeroed. */ |
572 | ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment); | |
5b79dba5 AI |
573 | |
574 | /* Note that various sections below may be aliases. */ | |
575 | if (section == data_section) | |
2147fb50 | 576 | { |
5b79dba5 AI |
577 | dst = dst_save |
578 | + RVA_TO_SECTION_OFFSET (PTR_TO_RVA (data_start), dst_section); | |
4162f25f EZ |
579 | COPY_PROC_CHUNK ("Dumping initialized data...", |
580 | data_start, data_size, be_verbose); | |
5b79dba5 | 581 | dst = dst_save + dst_section->SizeOfRawData; |
2147fb50 | 582 | } |
5b79dba5 | 583 | if (section == bss_section) |
43640c4d | 584 | { |
5b79dba5 AI |
585 | /* Dump contents of bss variables, adjusting the section's raw |
586 | data size as necessary. */ | |
587 | dst = dst_save | |
588 | + RVA_TO_SECTION_OFFSET (PTR_TO_RVA (bss_start), dst_section); | |
4162f25f EZ |
589 | COPY_PROC_CHUNK ("Dumping bss data...", bss_start, |
590 | bss_size, be_verbose); | |
5b79dba5 AI |
591 | ROUND_UP_DST (dst_nt_header->OptionalHeader.FileAlignment); |
592 | dst_section->PointerToRawData = PTR_TO_OFFSET (dst_save, p_outfile); | |
593 | /* Determine new size of raw data area. */ | |
594 | dst = max (dst, dst_save + dst_section->SizeOfRawData); | |
595 | dst_section->SizeOfRawData = dst - dst_save; | |
596 | dst_section->Characteristics &= ~IMAGE_SCN_CNT_UNINITIALIZED_DATA; | |
597 | dst_section->Characteristics |= IMAGE_SCN_CNT_INITIALIZED_DATA; | |
43640c4d | 598 | } |
5b79dba5 AI |
599 | if (section == bss_section_static) |
600 | { | |
601 | /* Dump contents of static bss variables, adjusting the | |
602 | section's raw data size as necessary. */ | |
603 | dst = dst_save | |
604 | + RVA_TO_SECTION_OFFSET (PTR_TO_RVA (bss_start_static), dst_section); | |
4162f25f EZ |
605 | COPY_PROC_CHUNK ("Dumping static bss data...", bss_start_static, |
606 | bss_size_static, be_verbose); | |
5b79dba5 AI |
607 | ROUND_UP_DST (dst_nt_header->OptionalHeader.FileAlignment); |
608 | dst_section->PointerToRawData = PTR_TO_OFFSET (dst_save, p_outfile); | |
609 | /* Determine new size of raw data area. */ | |
610 | dst = max (dst, dst_save + dst_section->SizeOfRawData); | |
611 | dst_section->SizeOfRawData = dst - dst_save; | |
612 | dst_section->Characteristics &= ~IMAGE_SCN_CNT_UNINITIALIZED_DATA; | |
613 | dst_section->Characteristics |= IMAGE_SCN_CNT_INITIALIZED_DATA; | |
614 | } | |
615 | if (section == heap_section) | |
616 | { | |
62aba0d4 FP |
617 | DWORD_PTR heap_start = (DWORD_PTR) get_heap_start (); |
618 | DWORD_PTR heap_size = get_committed_heap_size (); | |
5b79dba5 AI |
619 | |
620 | /* Dump the used portion of the predump heap, adjusting the | |
621 | section's size to the appropriate size. */ | |
622 | dst = dst_save | |
623 | + RVA_TO_SECTION_OFFSET (PTR_TO_RVA (heap_start), dst_section); | |
4162f25f EZ |
624 | COPY_PROC_CHUNK ("Dumping heap...", heap_start, heap_size, |
625 | be_verbose); | |
5b79dba5 AI |
626 | ROUND_UP_DST (dst_nt_header->OptionalHeader.FileAlignment); |
627 | dst_section->PointerToRawData = PTR_TO_OFFSET (dst_save, p_outfile); | |
628 | /* Determine new size of raw data area. */ | |
629 | dst = max (dst, dst_save + dst_section->SizeOfRawData); | |
630 | dst_section->SizeOfRawData = dst - dst_save; | |
631 | /* Reduce the size of the heap section to fit (must be last | |
632 | section). */ | |
633 | dst_nt_header->OptionalHeader.SizeOfImage -= | |
634 | dst_section->Misc.VirtualSize | |
635 | - ROUND_UP (dst_section->SizeOfRawData, | |
636 | dst_nt_header->OptionalHeader.SectionAlignment); | |
637 | dst_section->Misc.VirtualSize = | |
638 | ROUND_UP (dst_section->SizeOfRawData, | |
639 | dst_nt_header->OptionalHeader.SectionAlignment); | |
640 | dst_section->Characteristics &= ~IMAGE_SCN_CNT_UNINITIALIZED_DATA; | |
641 | dst_section->Characteristics |= IMAGE_SCN_CNT_INITIALIZED_DATA; | |
642 | } | |
643 | ||
7fef47a3 AI |
644 | /* Align the section's raw data area. */ |
645 | ROUND_UP_DST (dst_nt_header->OptionalHeader.FileAlignment); | |
646 | ||
2147fb50 | 647 | section++; |
5b79dba5 | 648 | dst_section++; |
2147fb50 | 649 | } |
a610993d | 650 | |
5b79dba5 AI |
651 | /* Copy remainder of source image. */ |
652 | do | |
653 | section--; | |
654 | while (section->PointerToRawData == 0); | |
655 | offset = ROUND_UP (section->PointerToRawData + section->SizeOfRawData, | |
656 | nt_header->OptionalHeader.FileAlignment); | |
657 | COPY_CHUNK | |
658 | ("Copying remainder of executable...", | |
659 | OFFSET_TO_PTR (offset, p_infile), | |
4162f25f | 660 | p_infile->size - offset, be_verbose); |
5b79dba5 AI |
661 | |
662 | /* Final size for new image. */ | |
663 | p_outfile->size = DST_TO_OFFSET (); | |
664 | ||
665 | /* Now patch up remaining file-relative offsets. */ | |
666 | section = IMAGE_FIRST_SECTION (nt_header); | |
667 | dst_section = IMAGE_FIRST_SECTION (dst_nt_header); | |
668 | ||
669 | #define ADJUST_OFFSET(var) \ | |
670 | do { \ | |
671 | if ((var) != 0) \ | |
672 | (var) = relocate_offset ((var), nt_header, dst_nt_header); \ | |
673 | } while (0) | |
674 | ||
675 | dst_nt_header->OptionalHeader.SizeOfInitializedData = 0; | |
676 | dst_nt_header->OptionalHeader.SizeOfUninitializedData = 0; | |
677 | for (i = 0; i < dst_nt_header->FileHeader.NumberOfSections; i++) | |
a610993d | 678 | { |
5b79dba5 AI |
679 | /* Recompute data sizes for completeness. */ |
680 | if (dst_section[i].Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA) | |
681 | dst_nt_header->OptionalHeader.SizeOfInitializedData += | |
682 | ROUND_UP (dst_section[i].Misc.VirtualSize, dst_nt_header->OptionalHeader.FileAlignment); | |
683 | else if (dst_section[i].Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) | |
684 | dst_nt_header->OptionalHeader.SizeOfUninitializedData += | |
685 | ROUND_UP (dst_section[i].Misc.VirtualSize, dst_nt_header->OptionalHeader.FileAlignment); | |
686 | ||
687 | ADJUST_OFFSET (dst_section[i].PointerToLinenumbers); | |
a610993d | 688 | } |
2147fb50 | 689 | |
5b79dba5 | 690 | ADJUST_OFFSET (dst_nt_header->FileHeader.PointerToSymbolTable); |
2147fb50 | 691 | |
5b79dba5 AI |
692 | /* Update offsets in debug directory entries. */ |
693 | { | |
694 | IMAGE_DATA_DIRECTORY debug_dir = | |
695 | dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG]; | |
696 | PIMAGE_DEBUG_DIRECTORY debug_entry; | |
2147fb50 | 697 | |
5b79dba5 AI |
698 | section = rva_to_section (debug_dir.VirtualAddress, dst_nt_header); |
699 | if (section) | |
700 | { | |
701 | debug_entry = (PIMAGE_DEBUG_DIRECTORY) | |
702 | (RVA_TO_OFFSET (debug_dir.VirtualAddress, section) + p_outfile->file_base); | |
703 | debug_dir.Size /= sizeof (IMAGE_DEBUG_DIRECTORY); | |
2147fb50 | 704 | |
5b79dba5 AI |
705 | for (i = 0; i < debug_dir.Size; i++, debug_entry++) |
706 | ADJUST_OFFSET (debug_entry->PointerToRawData); | |
707 | } | |
708 | } | |
2147fb50 KH |
709 | } |
710 | ||
711 | ||
5b79dba5 | 712 | /* Dump out .data and .bss sections into a new executable. */ |
381259ef | 713 | void |
dd5ecd6b | 714 | unexec (const char *new_name, const char *old_name) |
9c8056fe | 715 | { |
5b79dba5 AI |
716 | file_data in_file, out_file; |
717 | char out_filename[MAX_PATH], in_filename[MAX_PATH]; | |
718 | unsigned long size; | |
49dc9682 AI |
719 | char *p; |
720 | char *q; | |
721 | ||
722 | /* Ignore old_name, and get our actual location from the OS. */ | |
723 | if (!GetModuleFileName (NULL, in_filename, MAX_PATH)) | |
724 | abort (); | |
e7ac588e | 725 | dostounix_filename (in_filename, 0); |
49dc9682 AI |
726 | strcpy (out_filename, in_filename); |
727 | ||
728 | /* Change the base of the output filename to match the requested name. */ | |
729 | if ((p = strrchr (out_filename, '/')) == NULL) | |
730 | abort (); | |
731 | /* The filenames have already been expanded, and will be in Unix | |
732 | format, so it is safe to expect an absolute name. */ | |
733 | if ((q = strrchr (new_name, '/')) == NULL) | |
734 | abort (); | |
735 | strcpy (p, q); | |
177c0ea7 | 736 | |
49dc9682 AI |
737 | /* Make sure that the output filename has the ".exe" extension...patch |
738 | it up if not. */ | |
739 | p = out_filename + strlen (out_filename) - 4; | |
740 | if (strcmp (p, ".exe")) | |
5b79dba5 | 741 | strcat (out_filename, ".exe"); |
2147fb50 | 742 | |
5b79dba5 AI |
743 | printf ("Dumping from %s\n", in_filename); |
744 | printf (" to %s\n", out_filename); | |
2147fb50 | 745 | |
5b79dba5 AI |
746 | /* We need to round off our heap to NT's page size. */ |
747 | round_heap (get_page_size ()); | |
198fdd15 | 748 | |
5b79dba5 AI |
749 | /* Open the undumped executable file. */ |
750 | if (!open_input_file (&in_file, in_filename)) | |
751 | { | |
177c0ea7 | 752 | printf ("Failed to open %s (%d)...bailing.\n", |
5b79dba5 AI |
753 | in_filename, GetLastError ()); |
754 | exit (1); | |
755 | } | |
2147fb50 | 756 | |
5b79dba5 AI |
757 | /* Get the interesting section info, like start and size of .bss... */ |
758 | get_section_info (&in_file); | |
2147fb50 | 759 | |
5b79dba5 AI |
760 | /* The size of the dumped executable is the size of the original |
761 | executable plus the size of the heap and the size of the .bss section. */ | |
762 | size = in_file.size + | |
763 | get_committed_heap_size () + | |
764 | extra_bss_size + | |
765 | extra_bss_size_static; | |
766 | if (!open_output_file (&out_file, out_filename, size)) | |
198fdd15 | 767 | { |
177c0ea7 | 768 | printf ("Failed to open %s (%d)...bailing.\n", |
5b79dba5 AI |
769 | out_filename, GetLastError ()); |
770 | exit (1); | |
198fdd15 GV |
771 | } |
772 | ||
5b79dba5 AI |
773 | /* Set the flag (before dumping). */ |
774 | using_dynamic_heap = TRUE; | |
198fdd15 | 775 | |
5b79dba5 | 776 | copy_executable_and_dump_data (&in_file, &out_file); |
198fdd15 | 777 | |
5b79dba5 AI |
778 | /* Patch up header fields; profiler is picky about this. */ |
779 | { | |
780 | PIMAGE_DOS_HEADER dos_header; | |
781 | PIMAGE_NT_HEADERS nt_header; | |
782 | HANDLE hImagehelp = LoadLibrary ("imagehlp.dll"); | |
783 | DWORD headersum; | |
784 | DWORD checksum; | |
198fdd15 | 785 | |
5b79dba5 AI |
786 | dos_header = (PIMAGE_DOS_HEADER) out_file.file_base; |
787 | nt_header = (PIMAGE_NT_HEADERS) ((char *) dos_header + dos_header->e_lfanew); | |
198fdd15 | 788 | |
5b79dba5 AI |
789 | nt_header->OptionalHeader.CheckSum = 0; |
790 | // nt_header->FileHeader.TimeDateStamp = time (NULL); | |
791 | // dos_header->e_cp = size / 512; | |
792 | // nt_header->OptionalHeader.SizeOfImage = size; | |
793 | ||
794 | pfnCheckSumMappedFile = (void *) GetProcAddress (hImagehelp, "CheckSumMappedFile"); | |
795 | if (pfnCheckSumMappedFile) | |
796 | { | |
797 | // nt_header->FileHeader.TimeDateStamp = time (NULL); | |
798 | pfnCheckSumMappedFile (out_file.file_base, | |
799 | out_file.size, | |
800 | &headersum, | |
801 | &checksum); | |
802 | nt_header->OptionalHeader.CheckSum = checksum; | |
803 | } | |
804 | FreeLibrary (hImagehelp); | |
805 | } | |
198fdd15 | 806 | |
5b79dba5 AI |
807 | close_file_data (&in_file); |
808 | close_file_data (&out_file); | |
2147fb50 | 809 | } |
5b79dba5 AI |
810 | |
811 | /* eof */ |