Commit | Line | Data |
---|---|---|
3b7ad313 | 1 | /* unexec for GNU Emacs on Windows NT. |
ba318903 | 2 | Copyright (C) 1994, 2001-2014 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 | 85 | |
e05d3a05 FP |
86 | /* MinGW64 doesn't add a leading underscore to external symbols, |
87 | whereas configure.ac sets up LD_SWITCH_SYSTEM_TEMACS to force the | |
88 | entry point at __start, with two underscores. */ | |
89 | #ifdef __MINGW64__ | |
90 | #define _start __start | |
91 | #endif | |
92 | ||
2147fb50 KH |
93 | /* Startup code for running on NT. When we are running as the dumped |
94 | version, we need to bootstrap our heap and .bss section into our | |
95 | address space before we can actually hand off control to the startup | |
96 | code supplied by NT (primarily because that code relies upon malloc ()). */ | |
97 | void | |
98 | _start (void) | |
99 | { | |
100 | extern void mainCRTStartup (void); | |
101 | ||
7fef47a3 | 102 | #if 1 |
43640c4d GV |
103 | /* Give us a way to debug problems with crashes on startup when |
104 | running under the MSVC profiler. */ | |
105 | if (GetEnvironmentVariable ("EMACS_DEBUG", NULL, 0) > 0) | |
106 | DebugBreak (); | |
107 | #endif | |
108 | ||
2147fb50 KH |
109 | /* Cache system info, e.g., the NT page size. */ |
110 | cache_system_info (); | |
111 | ||
5b79dba5 AI |
112 | /* Grab our malloc arena space now, before CRT starts up. */ |
113 | init_heap (); | |
2147fb50 | 114 | |
2147fb50 KH |
115 | /* This prevents ctrl-c's in shells running while we're suspended from |
116 | having us exit. */ | |
117 | SetConsoleCtrlHandler ((PHANDLER_ROUTINE) ctrl_c_handler, TRUE); | |
118 | ||
467af476 AI |
119 | /* Prevent Emacs from being locked up (eg. in batch mode) when |
120 | accessing devices that aren't mounted (eg. removable media drives). */ | |
121 | SetErrorMode (SEM_FAILCRITICALERRORS); | |
2147fb50 KH |
122 | mainCRTStartup (); |
123 | } | |
124 | ||
2147fb50 KH |
125 | |
126 | /* File handling. */ | |
127 | ||
17788cb3 EZ |
128 | /* Implementation note: this and the next functions work with ANSI |
129 | codepage encoded file names! */ | |
43640c4d | 130 | int |
2147fb50 KH |
131 | open_input_file (file_data *p_file, char *filename) |
132 | { | |
133 | HANDLE file; | |
134 | HANDLE file_mapping; | |
135 | void *file_base; | |
136 | unsigned long size, upper_size; | |
137 | ||
17788cb3 EZ |
138 | file = CreateFileA (filename, GENERIC_READ, FILE_SHARE_READ, NULL, |
139 | OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0); | |
177c0ea7 | 140 | if (file == INVALID_HANDLE_VALUE) |
43640c4d | 141 | return FALSE; |
2147fb50 KH |
142 | |
143 | size = GetFileSize (file, &upper_size); | |
177c0ea7 | 144 | file_mapping = CreateFileMapping (file, NULL, PAGE_READONLY, |
2147fb50 | 145 | 0, size, NULL); |
177c0ea7 | 146 | if (!file_mapping) |
43640c4d | 147 | return FALSE; |
2147fb50 KH |
148 | |
149 | file_base = MapViewOfFile (file_mapping, FILE_MAP_READ, 0, 0, size); | |
177c0ea7 | 150 | if (file_base == 0) |
43640c4d | 151 | return FALSE; |
2147fb50 KH |
152 | |
153 | p_file->name = filename; | |
154 | p_file->size = size; | |
155 | p_file->file = file; | |
156 | p_file->file_mapping = file_mapping; | |
157 | p_file->file_base = file_base; | |
43640c4d GV |
158 | |
159 | return TRUE; | |
2147fb50 KH |
160 | } |
161 | ||
43640c4d | 162 | int |
2147fb50 KH |
163 | open_output_file (file_data *p_file, char *filename, unsigned long size) |
164 | { | |
165 | HANDLE file; | |
166 | HANDLE file_mapping; | |
167 | void *file_base; | |
cd6885f3 | 168 | |
2d0d2952 EZ |
169 | /* We delete any existing FILENAME because loadup.el will create a |
170 | hard link to it under the name emacs-XX.YY.ZZ.nn.exe. Evidently, | |
171 | overwriting a file on Unix breaks any hard links to it, but that | |
172 | doesn't happen on Windows. If we don't delete the file before | |
173 | creating it, all the emacs-XX.YY.ZZ.nn.exe end up being hard | |
174 | links to the same file, which defeats the purpose of these hard | |
175 | links: being able to run previous builds. */ | |
17788cb3 EZ |
176 | DeleteFileA (filename); |
177 | file = CreateFileA (filename, GENERIC_READ | GENERIC_WRITE, 0, NULL, | |
178 | CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0); | |
177c0ea7 | 179 | if (file == INVALID_HANDLE_VALUE) |
43640c4d GV |
180 | return FALSE; |
181 | ||
177c0ea7 | 182 | file_mapping = CreateFileMapping (file, NULL, PAGE_READWRITE, |
2147fb50 | 183 | 0, size, NULL); |
177c0ea7 | 184 | if (!file_mapping) |
43640c4d | 185 | return FALSE; |
177c0ea7 | 186 | |
2147fb50 | 187 | file_base = MapViewOfFile (file_mapping, FILE_MAP_WRITE, 0, 0, size); |
177c0ea7 | 188 | if (file_base == 0) |
43640c4d | 189 | return FALSE; |
177c0ea7 | 190 | |
2147fb50 KH |
191 | p_file->name = filename; |
192 | p_file->size = size; | |
193 | p_file->file = file; | |
194 | p_file->file_mapping = file_mapping; | |
195 | p_file->file_base = file_base; | |
43640c4d GV |
196 | |
197 | return TRUE; | |
2147fb50 KH |
198 | } |
199 | ||
200 | /* Close the system structures associated with the given file. */ | |
43640c4d | 201 | void |
2147fb50 KH |
202 | close_file_data (file_data *p_file) |
203 | { | |
5b79dba5 AI |
204 | UnmapViewOfFile (p_file->file_base); |
205 | CloseHandle (p_file->file_mapping); | |
206 | /* For the case of output files, set final size. */ | |
207 | SetFilePointer (p_file->file, p_file->size, NULL, FILE_BEGIN); | |
208 | SetEndOfFile (p_file->file); | |
209 | CloseHandle (p_file->file); | |
2147fb50 KH |
210 | } |
211 | ||
212 | ||
213 | /* Routines to manipulate NT executable file sections. */ | |
214 | ||
43640c4d GV |
215 | /* Return pointer to section header for named section. */ |
216 | IMAGE_SECTION_HEADER * | |
217 | find_section (char * name, IMAGE_NT_HEADERS * nt_header) | |
218 | { | |
219 | PIMAGE_SECTION_HEADER section; | |
220 | int i; | |
221 | ||
222 | section = IMAGE_FIRST_SECTION (nt_header); | |
223 | ||
224 | for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++) | |
225 | { | |
226 | if (strcmp (section->Name, name) == 0) | |
227 | return section; | |
228 | section++; | |
229 | } | |
230 | return NULL; | |
231 | } | |
232 | ||
233 | /* Return pointer to section header for section containing the given | |
234 | relative virtual address. */ | |
235 | IMAGE_SECTION_HEADER * | |
62aba0d4 | 236 | rva_to_section (DWORD_PTR rva, IMAGE_NT_HEADERS * nt_header) |
43640c4d GV |
237 | { |
238 | PIMAGE_SECTION_HEADER section; | |
239 | int i; | |
240 | ||
241 | section = IMAGE_FIRST_SECTION (nt_header); | |
242 | ||
243 | for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++) | |
2147fb50 | 244 | { |
5b79dba5 AI |
245 | /* Some linkers (eg. the NT SDK linker I believe) swapped the |
246 | meaning of these two values - or rather, they ignored | |
247 | VirtualSize entirely and always set it to zero. This affects | |
248 | some very old exes (eg. gzip dated Dec 1993). Since | |
249 | w32_executable_type relies on this function to work reliably, | |
250 | we need to cope with this. */ | |
62aba0d4 | 251 | DWORD_PTR real_size = max (section->SizeOfRawData, |
5b79dba5 | 252 | section->Misc.VirtualSize); |
43640c4d | 253 | if (rva >= section->VirtualAddress |
5b79dba5 AI |
254 | && rva < section->VirtualAddress + real_size) |
255 | return section; | |
256 | section++; | |
257 | } | |
258 | return NULL; | |
259 | } | |
260 | ||
261 | /* Return pointer to section header for section containing the given | |
262 | offset in its raw data area. */ | |
263 | IMAGE_SECTION_HEADER * | |
62aba0d4 | 264 | offset_to_section (DWORD_PTR offset, IMAGE_NT_HEADERS * nt_header) |
5b79dba5 AI |
265 | { |
266 | PIMAGE_SECTION_HEADER section; | |
267 | int i; | |
268 | ||
269 | section = IMAGE_FIRST_SECTION (nt_header); | |
270 | ||
271 | for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++) | |
272 | { | |
273 | if (offset >= section->PointerToRawData | |
274 | && offset < section->PointerToRawData + section->SizeOfRawData) | |
43640c4d GV |
275 | return section; |
276 | section++; | |
2147fb50 | 277 | } |
43640c4d | 278 | return NULL; |
2147fb50 KH |
279 | } |
280 | ||
5b79dba5 AI |
281 | /* Return offset to an object in dst, given offset in src. We assume |
282 | there is at least one section in both src and dst images, and that | |
283 | the some sections may have been added to dst (after sections in src). */ | |
62aba0d4 FP |
284 | DWORD_PTR |
285 | relocate_offset (DWORD_PTR offset, | |
5b79dba5 AI |
286 | IMAGE_NT_HEADERS * src_nt_header, |
287 | IMAGE_NT_HEADERS * dst_nt_header) | |
288 | { | |
289 | PIMAGE_SECTION_HEADER src_section = IMAGE_FIRST_SECTION (src_nt_header); | |
290 | PIMAGE_SECTION_HEADER dst_section = IMAGE_FIRST_SECTION (dst_nt_header); | |
291 | int i = 0; | |
292 | ||
293 | while (offset >= src_section->PointerToRawData) | |
294 | { | |
295 | if (offset < src_section->PointerToRawData + src_section->SizeOfRawData) | |
296 | break; | |
297 | i++; | |
298 | if (i == src_nt_header->FileHeader.NumberOfSections) | |
299 | { | |
300 | /* Handle offsets after the last section. */ | |
301 | dst_section = IMAGE_FIRST_SECTION (dst_nt_header); | |
302 | dst_section += dst_nt_header->FileHeader.NumberOfSections - 1; | |
303 | while (dst_section->PointerToRawData == 0) | |
304 | dst_section--; | |
305 | while (src_section->PointerToRawData == 0) | |
306 | src_section--; | |
307 | return offset | |
308 | + (dst_section->PointerToRawData + dst_section->SizeOfRawData) | |
309 | - (src_section->PointerToRawData + src_section->SizeOfRawData); | |
310 | } | |
311 | src_section++; | |
312 | dst_section++; | |
313 | } | |
314 | return offset + | |
315 | (dst_section->PointerToRawData - src_section->PointerToRawData); | |
316 | } | |
317 | ||
318 | #define OFFSET_TO_RVA(offset, section) \ | |
2d7d1608 | 319 | ((section)->VirtualAddress + ((DWORD_PTR)(offset) - (section)->PointerToRawData)) |
5b79dba5 AI |
320 | |
321 | #define RVA_TO_OFFSET(rva, section) \ | |
2d7d1608 | 322 | ((section)->PointerToRawData + ((DWORD_PTR)(rva) - (section)->VirtualAddress)) |
5b79dba5 AI |
323 | |
324 | #define RVA_TO_SECTION_OFFSET(rva, section) \ | |
2d7d1608 | 325 | ((DWORD_PTR)(rva) - (section)->VirtualAddress) |
5b79dba5 AI |
326 | |
327 | /* Convert address in executing image to RVA. */ | |
62aba0d4 | 328 | #define PTR_TO_RVA(ptr) ((DWORD_PTR)(ptr) - (DWORD_PTR) GetModuleHandle (NULL)) |
5b79dba5 | 329 | |
e9bdb9c9 | 330 | #define RVA_TO_PTR(var,section,filedata) \ |
2d7d1608 | 331 | ((unsigned char *)(RVA_TO_OFFSET (var,section) + (filedata).file_base)) |
e9bdb9c9 | 332 | |
5b79dba5 | 333 | #define PTR_TO_OFFSET(ptr, pfile_data) \ |
49dc9682 | 334 | ((unsigned char *)(ptr) - (pfile_data)->file_base) |
5b79dba5 AI |
335 | |
336 | #define OFFSET_TO_PTR(offset, pfile_data) \ | |
62aba0d4 | 337 | ((pfile_data)->file_base + (DWORD_PTR)(offset)) |
5b79dba5 | 338 | |
43640c4d | 339 | |
2147fb50 | 340 | /* Flip through the executable and cache the info necessary for dumping. */ |
49dc9682 | 341 | void |
2147fb50 KH |
342 | get_section_info (file_data *p_infile) |
343 | { | |
344 | PIMAGE_DOS_HEADER dos_header; | |
345 | PIMAGE_NT_HEADERS nt_header; | |
5b79dba5 | 346 | int overlap; |
177c0ea7 | 347 | |
2147fb50 | 348 | dos_header = (PIMAGE_DOS_HEADER) p_infile->file_base; |
177c0ea7 | 349 | if (dos_header->e_magic != IMAGE_DOS_SIGNATURE) |
2147fb50 KH |
350 | { |
351 | printf ("Unknown EXE header in %s...bailing.\n", p_infile->name); | |
352 | exit (1); | |
353 | } | |
62aba0d4 | 354 | nt_header = (PIMAGE_NT_HEADERS) (((DWORD_PTR) dos_header) + |
2147fb50 | 355 | dos_header->e_lfanew); |
177c0ea7 | 356 | if (nt_header == NULL) |
2147fb50 | 357 | { |
177c0ea7 | 358 | printf ("Failed to find IMAGE_NT_HEADER in %s...bailing.\n", |
2147fb50 KH |
359 | p_infile->name); |
360 | exit (1); | |
361 | } | |
362 | ||
363 | /* Check the NT header signature ... */ | |
177c0ea7 | 364 | if (nt_header->Signature != IMAGE_NT_SIGNATURE) |
2147fb50 KH |
365 | { |
366 | printf ("Invalid IMAGE_NT_SIGNATURE 0x%x in %s...bailing.\n", | |
367 | nt_header->Signature, p_infile->name); | |
5b79dba5 | 368 | exit (1); |
2147fb50 KH |
369 | } |
370 | ||
5b79dba5 AI |
371 | /* Locate the ".data" and ".bss" sections for Emacs. (Note that the |
372 | actual section names are probably different from these, and might | |
373 | actually be the same section.) | |
374 | ||
375 | We do this as follows: first we determine the virtual address | |
376 | ranges in this process for the data and bss variables that we wish | |
377 | to preserve. Then we map these VAs to the section entries in the | |
378 | source image. Finally, we determine the new size of the raw data | |
379 | area for the bss section, so we can make the new image the correct | |
380 | size. */ | |
381 | ||
e3ddd18c AI |
382 | /* We arrange for the Emacs initialized data to be in a separate |
383 | section if possible, because we cannot rely on my_begdata and | |
384 | my_edata marking out the full extent of the initialized data, at | |
385 | least on the Alpha where the linker freely reorders variables | |
386 | across libraries. If we can arrange for this, all we need to do is | |
387 | find the start and size of the EMDATA section. */ | |
388 | data_section = find_section ("EMDATA", nt_header); | |
389 | if (data_section) | |
2147fb50 | 390 | { |
e3ddd18c AI |
391 | data_start = (char *) nt_header->OptionalHeader.ImageBase + |
392 | data_section->VirtualAddress; | |
393 | data_size = data_section->Misc.VirtualSize; | |
394 | } | |
395 | else | |
396 | { | |
397 | /* Fallback on the old method if compiler doesn't support the | |
398 | data_set #pragma (or its equivalent). */ | |
399 | data_start = my_begdata; | |
400 | data_size = my_edata - my_begdata; | |
401 | data_section = rva_to_section (PTR_TO_RVA (my_begdata), nt_header); | |
402 | if (data_section != rva_to_section (PTR_TO_RVA (my_edata), nt_header)) | |
403 | { | |
404 | printf ("Initialized data is not in a single section...bailing\n"); | |
405 | exit (1); | |
406 | } | |
5b79dba5 AI |
407 | } |
408 | ||
409 | /* As noted in lastfile.c, the Alpha (but not the Intel) MSVC linker | |
410 | globally segregates all static and public bss data (ie. across all | |
411 | linked modules, not just per module), so we must take both static | |
412 | and public bss areas into account to determine the true extent of | |
413 | the bss area used by Emacs. | |
414 | ||
415 | To be strictly correct, we dump the static and public bss areas | |
416 | used by Emacs separately if non-overlapping (since otherwise we are | |
417 | dumping bss data belonging to system libraries, eg. the static bss | |
418 | system data on the Alpha). */ | |
419 | ||
420 | bss_start = my_begbss; | |
421 | bss_size = my_endbss - my_begbss; | |
422 | bss_section = rva_to_section (PTR_TO_RVA (my_begbss), nt_header); | |
423 | if (bss_section != rva_to_section (PTR_TO_RVA (my_endbss), nt_header)) | |
424 | { | |
425 | printf ("Uninitialized data is not in a single section...bailing\n"); | |
426 | exit (1); | |
427 | } | |
428 | /* Compute how much the .bss section's raw data will grow. */ | |
429 | extra_bss_size = | |
430 | ROUND_UP (RVA_TO_SECTION_OFFSET (PTR_TO_RVA (my_endbss), bss_section), | |
431 | nt_header->OptionalHeader.FileAlignment) | |
432 | - bss_section->SizeOfRawData; | |
433 | ||
434 | bss_start_static = my_begbss_static; | |
435 | bss_size_static = my_endbss_static - my_begbss_static; | |
436 | bss_section_static = rva_to_section (PTR_TO_RVA (my_begbss_static), nt_header); | |
437 | if (bss_section_static != rva_to_section (PTR_TO_RVA (my_endbss_static), nt_header)) | |
438 | { | |
439 | printf ("Uninitialized static data is not in a single section...bailing\n"); | |
440 | exit (1); | |
441 | } | |
442 | /* Compute how much the static .bss section's raw data will grow. */ | |
443 | extra_bss_size_static = | |
444 | ROUND_UP (RVA_TO_SECTION_OFFSET (PTR_TO_RVA (my_endbss_static), bss_section_static), | |
445 | nt_header->OptionalHeader.FileAlignment) | |
446 | - bss_section_static->SizeOfRawData; | |
447 | ||
448 | /* Combine the bss sections into one if they overlap. */ | |
972ee7e0 AI |
449 | #ifdef _ALPHA_ |
450 | overlap = 1; /* force all bss data to be dumped */ | |
451 | #else | |
5b79dba5 | 452 | overlap = 0; |
972ee7e0 | 453 | #endif |
5b79dba5 AI |
454 | if (bss_start < bss_start_static) |
455 | { | |
456 | if (bss_start_static < bss_start + bss_size) | |
457 | overlap = 1; | |
458 | } | |
459 | else | |
460 | { | |
461 | if (bss_start < bss_start_static + bss_size_static) | |
462 | overlap = 1; | |
463 | } | |
464 | if (overlap) | |
465 | { | |
466 | if (bss_section != bss_section_static) | |
2147fb50 | 467 | { |
5b79dba5 AI |
468 | printf ("BSS data not in a single section...bailing\n"); |
469 | exit (1); | |
2147fb50 | 470 | } |
5b79dba5 AI |
471 | bss_start = min (bss_start, bss_start_static); |
472 | bss_size = max (my_endbss, my_endbss_static) - bss_start; | |
473 | bss_section_static = 0; | |
474 | extra_bss_size_static = 0; | |
475 | } | |
5b79dba5 AI |
476 | } |
477 | ||
478 | ||
479 | /* The dump routines. */ | |
480 | ||
49dc9682 | 481 | void |
177c0ea7 | 482 | copy_executable_and_dump_data (file_data *p_infile, |
5b79dba5 AI |
483 | file_data *p_outfile) |
484 | { | |
485 | unsigned char *dst, *dst_save; | |
486 | PIMAGE_DOS_HEADER dos_header; | |
487 | PIMAGE_NT_HEADERS nt_header; | |
488 | PIMAGE_NT_HEADERS dst_nt_header; | |
489 | PIMAGE_SECTION_HEADER section; | |
490 | PIMAGE_SECTION_HEADER dst_section; | |
62aba0d4 | 491 | DWORD_PTR offset; |
5b79dba5 | 492 | int i; |
4162f25f | 493 | int be_verbose = GetEnvironmentVariable ("DEBUG_DUMP", NULL, 0) > 0; |
5b79dba5 | 494 | |
4162f25f | 495 | #define COPY_CHUNK(message, src, size, verbose) \ |
5b79dba5 AI |
496 | do { \ |
497 | unsigned char *s = (void *)(src); \ | |
498 | unsigned long count = (size); \ | |
4162f25f EZ |
499 | if (verbose) \ |
500 | { \ | |
501 | printf ("%s\n", (message)); \ | |
502 | printf ("\t0x%08x Offset in input file.\n", s - p_infile->file_base); \ | |
503 | printf ("\t0x%08x Offset in output file.\n", dst - p_outfile->file_base); \ | |
504 | printf ("\t0x%08x Size in bytes.\n", count); \ | |
505 | } \ | |
5b79dba5 AI |
506 | memcpy (dst, s, count); \ |
507 | dst += count; \ | |
508 | } while (0) | |
509 | ||
4162f25f | 510 | #define COPY_PROC_CHUNK(message, src, size, verbose) \ |
5b79dba5 AI |
511 | do { \ |
512 | unsigned char *s = (void *)(src); \ | |
513 | unsigned long count = (size); \ | |
4162f25f EZ |
514 | if (verbose) \ |
515 | { \ | |
516 | printf ("%s\n", (message)); \ | |
587fd086 FP |
517 | printf ("\t0x%p Address in process.\n", s); \ |
518 | printf ("\t0x%p Base output file.\n", p_outfile->file_base); \ | |
519 | printf ("\t0x%p Offset in output file.\n", dst - p_outfile->file_base); \ | |
520 | printf ("\t0x%p Address in output file.\n", dst); \ | |
521 | printf ("\t0x%p Size in bytes.\n", count); \ | |
4162f25f | 522 | } \ |
5b79dba5 AI |
523 | memcpy (dst, s, count); \ |
524 | dst += count; \ | |
525 | } while (0) | |
526 | ||
527 | #define DST_TO_OFFSET() PTR_TO_OFFSET (dst, p_outfile) | |
528 | #define ROUND_UP_DST(align) \ | |
529 | (dst = p_outfile->file_base + ROUND_UP (DST_TO_OFFSET (), (align))) | |
7fef47a3 AI |
530 | #define ROUND_UP_DST_AND_ZERO(align) \ |
531 | do { \ | |
532 | unsigned char *newdst = p_outfile->file_base \ | |
533 | + ROUND_UP (DST_TO_OFFSET (), (align)); \ | |
534 | /* Zero the alignment slop; it may actually initialize real data. */ \ | |
535 | memset (dst, 0, newdst - dst); \ | |
536 | dst = newdst; \ | |
537 | } while (0) | |
5b79dba5 AI |
538 | |
539 | /* Copy the source image sequentially, ie. section by section after | |
540 | copying the headers and section table, to simplify the process of | |
541 | dumping the raw data for the bss and heap sections. | |
542 | ||
543 | Note that dst is updated implicitly by each COPY_CHUNK. */ | |
544 | ||
545 | dos_header = (PIMAGE_DOS_HEADER) p_infile->file_base; | |
62aba0d4 | 546 | nt_header = (PIMAGE_NT_HEADERS) (((DWORD_PTR) dos_header) + |
5b79dba5 AI |
547 | dos_header->e_lfanew); |
548 | section = IMAGE_FIRST_SECTION (nt_header); | |
177c0ea7 | 549 | |
5b79dba5 AI |
550 | dst = (unsigned char *) p_outfile->file_base; |
551 | ||
552 | COPY_CHUNK ("Copying DOS header...", dos_header, | |
62aba0d4 | 553 | (DWORD_PTR) nt_header - (DWORD_PTR) dos_header, be_verbose); |
5b79dba5 AI |
554 | dst_nt_header = (PIMAGE_NT_HEADERS) dst; |
555 | COPY_CHUNK ("Copying NT header...", nt_header, | |
62aba0d4 | 556 | (DWORD_PTR) section - (DWORD_PTR) nt_header, be_verbose); |
5b79dba5 AI |
557 | dst_section = (PIMAGE_SECTION_HEADER) dst; |
558 | COPY_CHUNK ("Copying section table...", section, | |
4162f25f EZ |
559 | nt_header->FileHeader.NumberOfSections * sizeof (*section), |
560 | be_verbose); | |
5b79dba5 | 561 | |
7fef47a3 AI |
562 | /* Align the first section's raw data area, and set the header size |
563 | field accordingly. */ | |
564 | ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment); | |
565 | dst_nt_header->OptionalHeader.SizeOfHeaders = DST_TO_OFFSET (); | |
566 | ||
5b79dba5 AI |
567 | for (i = 0; i < nt_header->FileHeader.NumberOfSections; i++) |
568 | { | |
569 | char msg[100]; | |
4162f25f EZ |
570 | /* Windows section names are fixed 8-char strings, only |
571 | zero-terminated if the name is shorter than 8 characters. */ | |
572 | sprintf (msg, "Copying raw data for %.8s...", section->Name); | |
5b79dba5 | 573 | |
5b79dba5 AI |
574 | dst_save = dst; |
575 | ||
576 | /* Update the file-relative offset for this section's raw data (if | |
577 | it has any) in case things have been relocated; we will update | |
578 | the other offsets below once we know where everything is. */ | |
579 | if (dst_section->PointerToRawData) | |
580 | dst_section->PointerToRawData = DST_TO_OFFSET (); | |
581 | ||
582 | /* Can always copy the original raw data. */ | |
583 | COPY_CHUNK | |
584 | (msg, OFFSET_TO_PTR (section->PointerToRawData, p_infile), | |
4162f25f | 585 | section->SizeOfRawData, be_verbose); |
7fef47a3 AI |
586 | /* Ensure alignment slop is zeroed. */ |
587 | ROUND_UP_DST_AND_ZERO (dst_nt_header->OptionalHeader.FileAlignment); | |
5b79dba5 AI |
588 | |
589 | /* Note that various sections below may be aliases. */ | |
590 | if (section == data_section) | |
2147fb50 | 591 | { |
5b79dba5 AI |
592 | dst = dst_save |
593 | + RVA_TO_SECTION_OFFSET (PTR_TO_RVA (data_start), dst_section); | |
4162f25f EZ |
594 | COPY_PROC_CHUNK ("Dumping initialized data...", |
595 | data_start, data_size, be_verbose); | |
5b79dba5 | 596 | dst = dst_save + dst_section->SizeOfRawData; |
2147fb50 | 597 | } |
5b79dba5 | 598 | if (section == bss_section) |
43640c4d | 599 | { |
5b79dba5 AI |
600 | /* Dump contents of bss variables, adjusting the section's raw |
601 | data size as necessary. */ | |
602 | dst = dst_save | |
603 | + RVA_TO_SECTION_OFFSET (PTR_TO_RVA (bss_start), dst_section); | |
4162f25f EZ |
604 | COPY_PROC_CHUNK ("Dumping bss data...", bss_start, |
605 | bss_size, be_verbose); | |
5b79dba5 AI |
606 | ROUND_UP_DST (dst_nt_header->OptionalHeader.FileAlignment); |
607 | dst_section->PointerToRawData = PTR_TO_OFFSET (dst_save, p_outfile); | |
608 | /* Determine new size of raw data area. */ | |
609 | dst = max (dst, dst_save + dst_section->SizeOfRawData); | |
610 | dst_section->SizeOfRawData = dst - dst_save; | |
611 | dst_section->Characteristics &= ~IMAGE_SCN_CNT_UNINITIALIZED_DATA; | |
612 | dst_section->Characteristics |= IMAGE_SCN_CNT_INITIALIZED_DATA; | |
43640c4d | 613 | } |
5b79dba5 AI |
614 | if (section == bss_section_static) |
615 | { | |
616 | /* Dump contents of static bss variables, adjusting the | |
617 | section's raw data size as necessary. */ | |
618 | dst = dst_save | |
619 | + RVA_TO_SECTION_OFFSET (PTR_TO_RVA (bss_start_static), dst_section); | |
4162f25f EZ |
620 | COPY_PROC_CHUNK ("Dumping static bss data...", bss_start_static, |
621 | bss_size_static, be_verbose); | |
5b79dba5 AI |
622 | ROUND_UP_DST (dst_nt_header->OptionalHeader.FileAlignment); |
623 | dst_section->PointerToRawData = PTR_TO_OFFSET (dst_save, p_outfile); | |
624 | /* Determine new size of raw data area. */ | |
625 | dst = max (dst, dst_save + dst_section->SizeOfRawData); | |
626 | dst_section->SizeOfRawData = dst - dst_save; | |
627 | dst_section->Characteristics &= ~IMAGE_SCN_CNT_UNINITIALIZED_DATA; | |
628 | dst_section->Characteristics |= IMAGE_SCN_CNT_INITIALIZED_DATA; | |
629 | } | |
5b79dba5 | 630 | |
7fef47a3 AI |
631 | /* Align the section's raw data area. */ |
632 | ROUND_UP_DST (dst_nt_header->OptionalHeader.FileAlignment); | |
633 | ||
2147fb50 | 634 | section++; |
5b79dba5 | 635 | dst_section++; |
2147fb50 | 636 | } |
a610993d | 637 | |
5b79dba5 AI |
638 | /* Copy remainder of source image. */ |
639 | do | |
640 | section--; | |
641 | while (section->PointerToRawData == 0); | |
642 | offset = ROUND_UP (section->PointerToRawData + section->SizeOfRawData, | |
643 | nt_header->OptionalHeader.FileAlignment); | |
644 | COPY_CHUNK | |
645 | ("Copying remainder of executable...", | |
646 | OFFSET_TO_PTR (offset, p_infile), | |
4162f25f | 647 | p_infile->size - offset, be_verbose); |
5b79dba5 AI |
648 | |
649 | /* Final size for new image. */ | |
650 | p_outfile->size = DST_TO_OFFSET (); | |
651 | ||
652 | /* Now patch up remaining file-relative offsets. */ | |
653 | section = IMAGE_FIRST_SECTION (nt_header); | |
654 | dst_section = IMAGE_FIRST_SECTION (dst_nt_header); | |
655 | ||
656 | #define ADJUST_OFFSET(var) \ | |
657 | do { \ | |
658 | if ((var) != 0) \ | |
659 | (var) = relocate_offset ((var), nt_header, dst_nt_header); \ | |
660 | } while (0) | |
661 | ||
662 | dst_nt_header->OptionalHeader.SizeOfInitializedData = 0; | |
663 | dst_nt_header->OptionalHeader.SizeOfUninitializedData = 0; | |
664 | for (i = 0; i < dst_nt_header->FileHeader.NumberOfSections; i++) | |
a610993d | 665 | { |
5b79dba5 AI |
666 | /* Recompute data sizes for completeness. */ |
667 | if (dst_section[i].Characteristics & IMAGE_SCN_CNT_INITIALIZED_DATA) | |
668 | dst_nt_header->OptionalHeader.SizeOfInitializedData += | |
669 | ROUND_UP (dst_section[i].Misc.VirtualSize, dst_nt_header->OptionalHeader.FileAlignment); | |
670 | else if (dst_section[i].Characteristics & IMAGE_SCN_CNT_UNINITIALIZED_DATA) | |
671 | dst_nt_header->OptionalHeader.SizeOfUninitializedData += | |
672 | ROUND_UP (dst_section[i].Misc.VirtualSize, dst_nt_header->OptionalHeader.FileAlignment); | |
673 | ||
674 | ADJUST_OFFSET (dst_section[i].PointerToLinenumbers); | |
a610993d | 675 | } |
2147fb50 | 676 | |
5b79dba5 | 677 | ADJUST_OFFSET (dst_nt_header->FileHeader.PointerToSymbolTable); |
2147fb50 | 678 | |
5b79dba5 AI |
679 | /* Update offsets in debug directory entries. */ |
680 | { | |
681 | IMAGE_DATA_DIRECTORY debug_dir = | |
682 | dst_nt_header->OptionalHeader.DataDirectory[IMAGE_DIRECTORY_ENTRY_DEBUG]; | |
683 | PIMAGE_DEBUG_DIRECTORY debug_entry; | |
2147fb50 | 684 | |
5b79dba5 AI |
685 | section = rva_to_section (debug_dir.VirtualAddress, dst_nt_header); |
686 | if (section) | |
687 | { | |
688 | debug_entry = (PIMAGE_DEBUG_DIRECTORY) | |
689 | (RVA_TO_OFFSET (debug_dir.VirtualAddress, section) + p_outfile->file_base); | |
690 | debug_dir.Size /= sizeof (IMAGE_DEBUG_DIRECTORY); | |
2147fb50 | 691 | |
5b79dba5 AI |
692 | for (i = 0; i < debug_dir.Size; i++, debug_entry++) |
693 | ADJUST_OFFSET (debug_entry->PointerToRawData); | |
694 | } | |
695 | } | |
2147fb50 KH |
696 | } |
697 | ||
698 | ||
5b79dba5 | 699 | /* Dump out .data and .bss sections into a new executable. */ |
381259ef | 700 | void |
dd5ecd6b | 701 | unexec (const char *new_name, const char *old_name) |
9c8056fe | 702 | { |
5b79dba5 | 703 | file_data in_file, out_file; |
17788cb3 | 704 | char out_filename[MAX_PATH], in_filename[MAX_PATH], new_name_a[MAX_PATH]; |
5b79dba5 | 705 | unsigned long size; |
49dc9682 AI |
706 | char *p; |
707 | char *q; | |
708 | ||
709 | /* Ignore old_name, and get our actual location from the OS. */ | |
1fd201bb | 710 | if (!GetModuleFileNameA (NULL, in_filename, MAX_PATH)) |
49dc9682 | 711 | abort (); |
1fd201bb EZ |
712 | |
713 | /* Can't use dostounix_filename here, since that needs its file name | |
714 | argument encoded in UTF-8. */ | |
715 | for (p = in_filename; *p; p = CharNextA (p)) | |
716 | if (*p == '\\') | |
717 | *p = '/'; | |
718 | ||
49dc9682 | 719 | strcpy (out_filename, in_filename); |
17788cb3 | 720 | filename_to_ansi (new_name, new_name_a); |
49dc9682 AI |
721 | |
722 | /* Change the base of the output filename to match the requested name. */ | |
723 | if ((p = strrchr (out_filename, '/')) == NULL) | |
724 | abort (); | |
725 | /* The filenames have already been expanded, and will be in Unix | |
726 | format, so it is safe to expect an absolute name. */ | |
17788cb3 | 727 | if ((q = strrchr (new_name_a, '/')) == NULL) |
49dc9682 AI |
728 | abort (); |
729 | strcpy (p, q); | |
177c0ea7 | 730 | |
d2ff520a EZ |
731 | #ifdef ENABLE_CHECKING |
732 | report_temacs_memory_usage (); | |
733 | #endif | |
734 | ||
49dc9682 AI |
735 | /* Make sure that the output filename has the ".exe" extension...patch |
736 | it up if not. */ | |
737 | p = out_filename + strlen (out_filename) - 4; | |
738 | if (strcmp (p, ".exe")) | |
5b79dba5 | 739 | strcat (out_filename, ".exe"); |
2147fb50 | 740 | |
5b79dba5 AI |
741 | printf ("Dumping from %s\n", in_filename); |
742 | printf (" to %s\n", out_filename); | |
2147fb50 | 743 | |
5b79dba5 AI |
744 | /* Open the undumped executable file. */ |
745 | if (!open_input_file (&in_file, in_filename)) | |
746 | { | |
177c0ea7 | 747 | printf ("Failed to open %s (%d)...bailing.\n", |
5b79dba5 AI |
748 | in_filename, GetLastError ()); |
749 | exit (1); | |
750 | } | |
2147fb50 | 751 | |
5b79dba5 AI |
752 | /* Get the interesting section info, like start and size of .bss... */ |
753 | get_section_info (&in_file); | |
2147fb50 | 754 | |
5b79dba5 AI |
755 | /* The size of the dumped executable is the size of the original |
756 | executable plus the size of the heap and the size of the .bss section. */ | |
757 | size = in_file.size + | |
5b79dba5 AI |
758 | extra_bss_size + |
759 | extra_bss_size_static; | |
760 | if (!open_output_file (&out_file, out_filename, size)) | |
198fdd15 | 761 | { |
177c0ea7 | 762 | printf ("Failed to open %s (%d)...bailing.\n", |
5b79dba5 AI |
763 | out_filename, GetLastError ()); |
764 | exit (1); | |
198fdd15 GV |
765 | } |
766 | ||
5b79dba5 AI |
767 | /* Set the flag (before dumping). */ |
768 | using_dynamic_heap = TRUE; | |
198fdd15 | 769 | |
5b79dba5 | 770 | copy_executable_and_dump_data (&in_file, &out_file); |
587fd086 FP |
771 | |
772 | /* Unset it because it is plain wrong to keep it after dumping. | |
773 | Malloc can still occur! */ | |
774 | using_dynamic_heap = FALSE; | |
198fdd15 | 775 | |
5b79dba5 AI |
776 | /* Patch up header fields; profiler is picky about this. */ |
777 | { | |
778 | PIMAGE_DOS_HEADER dos_header; | |
779 | PIMAGE_NT_HEADERS nt_header; | |
780 | HANDLE hImagehelp = LoadLibrary ("imagehlp.dll"); | |
781 | DWORD headersum; | |
782 | DWORD checksum; | |
198fdd15 | 783 | |
5b79dba5 AI |
784 | dos_header = (PIMAGE_DOS_HEADER) out_file.file_base; |
785 | nt_header = (PIMAGE_NT_HEADERS) ((char *) dos_header + dos_header->e_lfanew); | |
198fdd15 | 786 | |
5b79dba5 AI |
787 | nt_header->OptionalHeader.CheckSum = 0; |
788 | // nt_header->FileHeader.TimeDateStamp = time (NULL); | |
789 | // dos_header->e_cp = size / 512; | |
790 | // nt_header->OptionalHeader.SizeOfImage = size; | |
791 | ||
792 | pfnCheckSumMappedFile = (void *) GetProcAddress (hImagehelp, "CheckSumMappedFile"); | |
793 | if (pfnCheckSumMappedFile) | |
794 | { | |
795 | // nt_header->FileHeader.TimeDateStamp = time (NULL); | |
796 | pfnCheckSumMappedFile (out_file.file_base, | |
797 | out_file.size, | |
798 | &headersum, | |
799 | &checksum); | |
800 | nt_header->OptionalHeader.CheckSum = checksum; | |
801 | } | |
802 | FreeLibrary (hImagehelp); | |
803 | } | |
198fdd15 | 804 | |
5b79dba5 AI |
805 | close_file_data (&in_file); |
806 | close_file_data (&out_file); | |
2147fb50 | 807 | } |
5b79dba5 AI |
808 | |
809 | /* eof */ |