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Optimize arithmetic with pointer to value on stack + constant
[tinycc/miki.git] / tccpe.c
blob6b68ff097185ed7e8b292f8b1d38d8cd06a9172c
1 /*
2 * TCCPE.C - PE file output for the Tiny C Compiler
3 *
4 * Copyright (c) 2005-2007 grischka
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library 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 GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20
21 #ifdef TCC_TARGET_PE
22
23 #define ST_FN static
24 #define ST_DATA static
25 #define PUB_FN
26
27 #ifndef _WIN32
28 #define stricmp strcasecmp
29 #define strnicmp strncasecmp
30 #endif
31
32 #ifndef MAX_PATH
33 #define MAX_PATH 260
34 #endif
35
36 #define PE_MERGE_DATA
37 // #define PE_PRINT_SECTIONS
38
39 /* ----------------------------------------------------------- */
40 #ifndef IMAGE_NT_SIGNATURE
41 /* ----------------------------------------------------------- */
42 /* definitions below are from winnt.h */
43
44 typedef unsigned char BYTE;
45 typedef unsigned short WORD;
46 typedef unsigned long DWORD;
47 #pragma pack(push, 1)
48
49 typedef struct _IMAGE_DOS_HEADER { /* DOS .EXE header */
50 WORD e_magic; /* Magic number */
51 WORD e_cblp; /* Bytes on last page of file */
52 WORD e_cp; /* Pages in file */
53 WORD e_crlc; /* Relocations */
54 WORD e_cparhdr; /* Size of header in paragraphs */
55 WORD e_minalloc; /* Minimum extra paragraphs needed */
56 WORD e_maxalloc; /* Maximum extra paragraphs needed */
57 WORD e_ss; /* Initial (relative) SS value */
58 WORD e_sp; /* Initial SP value */
59 WORD e_csum; /* Checksum */
60 WORD e_ip; /* Initial IP value */
61 WORD e_cs; /* Initial (relative) CS value */
62 WORD e_lfarlc; /* File address of relocation table */
63 WORD e_ovno; /* Overlay number */
64 WORD e_res[4]; /* Reserved words */
65 WORD e_oemid; /* OEM identifier (for e_oeminfo) */
66 WORD e_oeminfo; /* OEM information; e_oemid specific */
67 WORD e_res2[10]; /* Reserved words */
68 DWORD e_lfanew; /* File address of new exe header */
69 } IMAGE_DOS_HEADER, *PIMAGE_DOS_HEADER;
70
71 #define IMAGE_NT_SIGNATURE 0x00004550 /* PE00 */
72 #define SIZE_OF_NT_SIGNATURE 4
73
74 typedef struct _IMAGE_FILE_HEADER {
75 WORD Machine;
76 WORD NumberOfSections;
77 DWORD TimeDateStamp;
78 DWORD PointerToSymbolTable;
79 DWORD NumberOfSymbols;
80 WORD SizeOfOptionalHeader;
81 WORD Characteristics;
82 } IMAGE_FILE_HEADER, *PIMAGE_FILE_HEADER;
83
84
85 #define IMAGE_SIZEOF_FILE_HEADER 20
86
87 typedef struct _IMAGE_DATA_DIRECTORY {
88 DWORD VirtualAddress;
89 DWORD Size;
90 } IMAGE_DATA_DIRECTORY, *PIMAGE_DATA_DIRECTORY;
91
92
93 typedef struct _IMAGE_OPTIONAL_HEADER {
94 /* Standard fields. */
95 WORD Magic;
96 BYTE MajorLinkerVersion;
97 BYTE MinorLinkerVersion;
98 DWORD SizeOfCode;
99 DWORD SizeOfInitializedData;
100 DWORD SizeOfUninitializedData;
101 DWORD AddressOfEntryPoint;
102 DWORD BaseOfCode;
103 DWORD BaseOfData;
104
105 /* NT additional fields. */
106 DWORD ImageBase;
107 DWORD SectionAlignment;
108 DWORD FileAlignment;
109 WORD MajorOperatingSystemVersion;
110 WORD MinorOperatingSystemVersion;
111 WORD MajorImageVersion;
112 WORD MinorImageVersion;
113 WORD MajorSubsystemVersion;
114 WORD MinorSubsystemVersion;
115 DWORD Win32VersionValue;
116 DWORD SizeOfImage;
117 DWORD SizeOfHeaders;
118 DWORD CheckSum;
119 WORD Subsystem;
120 WORD DllCharacteristics;
121 DWORD SizeOfStackReserve;
122 DWORD SizeOfStackCommit;
123 DWORD SizeOfHeapReserve;
124 DWORD SizeOfHeapCommit;
125 DWORD LoaderFlags;
126 DWORD NumberOfRvaAndSizes;
127 IMAGE_DATA_DIRECTORY DataDirectory[16];
128
129 } IMAGE_OPTIONAL_HEADER, *PIMAGE_OPTIONAL_HEADER;
130
131
132 #define IMAGE_DIRECTORY_ENTRY_EXPORT 0 /* Export Directory */
133 #define IMAGE_DIRECTORY_ENTRY_IMPORT 1 /* Import Directory */
134 #define IMAGE_DIRECTORY_ENTRY_RESOURCE 2 /* Resource Directory */
135 #define IMAGE_DIRECTORY_ENTRY_EXCEPTION 3 /* Exception Directory */
136 #define IMAGE_DIRECTORY_ENTRY_SECURITY 4 /* Security Directory */
137 #define IMAGE_DIRECTORY_ENTRY_BASERELOC 5 /* Base Relocation Table */
138 #define IMAGE_DIRECTORY_ENTRY_DEBUG 6 /* Debug Directory */
139 /* IMAGE_DIRECTORY_ENTRY_COPYRIGHT 7 (X86 usage) */
140 #define IMAGE_DIRECTORY_ENTRY_ARCHITECTURE 7 /* Architecture Specific Data */
141 #define IMAGE_DIRECTORY_ENTRY_GLOBALPTR 8 /* RVA of GP */
142 #define IMAGE_DIRECTORY_ENTRY_TLS 9 /* TLS Directory */
143 #define IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG 10 /* Load Configuration Directory */
144 #define IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT 11 /* Bound Import Directory in headers */
145 #define IMAGE_DIRECTORY_ENTRY_IAT 12 /* Import Address Table */
146 #define IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT 13 /* Delay Load Import Descriptors */
147 #define IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR 14 /* COM Runtime descriptor */
148
149 /* Section header format. */
150 #define IMAGE_SIZEOF_SHORT_NAME 8
151
152 typedef struct _IMAGE_SECTION_HEADER {
153 BYTE Name[IMAGE_SIZEOF_SHORT_NAME];
154 union {
155 DWORD PhysicalAddress;
156 DWORD VirtualSize;
157 } Misc;
158 DWORD VirtualAddress;
159 DWORD SizeOfRawData;
160 DWORD PointerToRawData;
161 DWORD PointerToRelocations;
162 DWORD PointerToLinenumbers;
163 WORD NumberOfRelocations;
164 WORD NumberOfLinenumbers;
165 DWORD Characteristics;
166 } IMAGE_SECTION_HEADER, *PIMAGE_SECTION_HEADER;
167
168 #define IMAGE_SIZEOF_SECTION_HEADER 40
169
170 typedef struct _IMAGE_BASE_RELOCATION {
171 DWORD VirtualAddress;
172 DWORD SizeOfBlock;
173 // WORD TypeOffset[1];
174 } IMAGE_BASE_RELOCATION;
175
176 #define IMAGE_SIZEOF_BASE_RELOCATION 8
177
178 #define IMAGE_REL_BASED_ABSOLUTE 0
179 #define IMAGE_REL_BASED_HIGH 1
180 #define IMAGE_REL_BASED_LOW 2
181 #define IMAGE_REL_BASED_HIGHLOW 3
182 #define IMAGE_REL_BASED_HIGHADJ 4
183 #define IMAGE_REL_BASED_MIPS_JMPADDR 5
184 #define IMAGE_REL_BASED_SECTION 6
185 #define IMAGE_REL_BASED_REL32 7
186
187 #pragma pack(pop)
188
189 /* ----------------------------------------------------------- */
190 #endif /* ndef IMAGE_NT_SIGNATURE */
191 /* ----------------------------------------------------------- */
192
193 #pragma pack(push, 1)
194
195 struct pe_header
196 {
197 IMAGE_DOS_HEADER doshdr;
198 BYTE dosstub[0x40];
199 DWORD nt_sig;
200 IMAGE_FILE_HEADER filehdr;
201 IMAGE_OPTIONAL_HEADER opthdr;
202 };
203
204 struct pe_import_header {
205 DWORD first_entry;
206 DWORD time_date;
207 DWORD forwarder;
208 DWORD lib_name_offset;
209 DWORD first_thunk;
210 };
211
212 struct pe_export_header {
213 DWORD Characteristics;
214 DWORD TimeDateStamp;
215 DWORD Version;
216 DWORD Name;
217 DWORD Base;
218 DWORD NumberOfFunctions;
219 DWORD NumberOfNames;
220 DWORD AddressOfFunctions;
221 DWORD AddressOfNames;
222 DWORD AddressOfNameOrdinals;
223 };
224
225 struct pe_reloc_header {
226 DWORD offset;
227 DWORD size;
228 };
229
230 struct pe_rsrc_header {
231 struct _IMAGE_FILE_HEADER filehdr;
232 struct _IMAGE_SECTION_HEADER sectionhdr;
233 };
234
235 struct pe_rsrc_reloc {
236 DWORD offset;
237 DWORD size;
238 WORD type;
239 };
240
241 #pragma pack(pop)
242
243 /* ----------------------------------------------------------- */
244 ST_DATA struct pe_header pe_header = {
245 {
246 /* IMAGE_DOS_HEADER doshdr */
247 0x5A4D, /*WORD e_magic; Magic number */
248 0x0090, /*WORD e_cblp; Bytes on last page of file */
249 0x0003, /*WORD e_cp; Pages in file */
250 0x0000, /*WORD e_crlc; Relocations */
251
252 0x0004, /*WORD e_cparhdr; Size of header in paragraphs */
253 0x0000, /*WORD e_minalloc; Minimum extra paragraphs needed */
254 0xFFFF, /*WORD e_maxalloc; Maximum extra paragraphs needed */
255 0x0000, /*WORD e_ss; Initial (relative) SS value */
256
257 0x00B8, /*WORD e_sp; Initial SP value */
258 0x0000, /*WORD e_csum; Checksum */
259 0x0000, /*WORD e_ip; Initial IP value */
260 0x0000, /*WORD e_cs; Initial (relative) CS value */
261 0x0040, /*WORD e_lfarlc; File address of relocation table */
262 0x0000, /*WORD e_ovno; Overlay number */
263 {0,0,0,0}, /*WORD e_res[4]; Reserved words */
264 0x0000, /*WORD e_oemid; OEM identifier (for e_oeminfo) */
265 0x0000, /*WORD e_oeminfo; OEM information; e_oemid specific */
266 {0,0,0,0,0,0,0,0,0,0}, /*WORD e_res2[10]; Reserved words */
267 0x00000080 /*DWORD e_lfanew; File address of new exe header */
268 },{
269 /* BYTE dosstub[0x40] */
270 /* 14 code bytes + "This program cannot be run in DOS mode.\r\r\n$" + 6 * 0x00 */
271 0x0e,0x1f,0xba,0x0e,0x00,0xb4,0x09,0xcd,0x21,0xb8,0x01,0x4c,0xcd,0x21,0x54,0x68,
272 0x69,0x73,0x20,0x70,0x72,0x6f,0x67,0x72,0x61,0x6d,0x20,0x63,0x61,0x6e,0x6e,0x6f,
273 0x74,0x20,0x62,0x65,0x20,0x72,0x75,0x6e,0x20,0x69,0x6e,0x20,0x44,0x4f,0x53,0x20,
274 0x6d,0x6f,0x64,0x65,0x2e,0x0d,0x0d,0x0a,0x24,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
275 },
276 0x00004550, /* DWORD nt_sig = IMAGE_NT_SIGNATURE */
277 {
278 /* IMAGE_FILE_HEADER filehdr */
279 0x014C, /*WORD Machine; */
280 0x0003, /*WORD NumberOfSections; */
281 0x00000000, /*DWORD TimeDateStamp; */
282 0x00000000, /*DWORD PointerToSymbolTable; */
283 0x00000000, /*DWORD NumberOfSymbols; */
284 0x00E0, /*WORD SizeOfOptionalHeader; */
285 0x030F /*WORD Characteristics; */
286 },{
287 /* IMAGE_OPTIONAL_HEADER opthdr */
288 /* Standard fields. */
289 0x010B, /*WORD Magic; */
290 0x06, /*BYTE MajorLinkerVersion; */
291 0x00, /*BYTE MinorLinkerVersion; */
292 0x00000000, /*DWORD SizeOfCode; */
293 0x00000000, /*DWORD SizeOfInitializedData; */
294 0x00000000, /*DWORD SizeOfUninitializedData; */
295 0x00000000, /*DWORD AddressOfEntryPoint; */
296 0x00000000, /*DWORD BaseOfCode; */
297 0x00000000, /*DWORD BaseOfData; */
298
299 /* NT additional fields. */
300 0x00400000, /*DWORD ImageBase; */
301 0x00001000, /*DWORD SectionAlignment; */
302 0x00000200, /*DWORD FileAlignment; */
303 0x0004, /*WORD MajorOperatingSystemVersion; */
304 0x0000, /*WORD MinorOperatingSystemVersion; */
305 0x0000, /*WORD MajorImageVersion; */
306 0x0000, /*WORD MinorImageVersion; */
307 0x0004, /*WORD MajorSubsystemVersion; */
308 0x0000, /*WORD MinorSubsystemVersion; */
309 0x00000000, /*DWORD Win32VersionValue; */
310 0x00000000, /*DWORD SizeOfImage; */
311 0x00000200, /*DWORD SizeOfHeaders; */
312 0x00000000, /*DWORD CheckSum; */
313 0x0002, /*WORD Subsystem; */
314 0x0000, /*WORD DllCharacteristics; */
315 0x00100000, /*DWORD SizeOfStackReserve; */
316 0x00001000, /*DWORD SizeOfStackCommit; */
317 0x00100000, /*DWORD SizeOfHeapReserve; */
318 0x00001000, /*DWORD SizeOfHeapCommit; */
319 0x00000000, /*DWORD LoaderFlags; */
320 0x00000010, /*DWORD NumberOfRvaAndSizes; */
321
322 /* IMAGE_DATA_DIRECTORY DataDirectory[16]; */
323 {{0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0},
324 {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}}
325 }};
326
327 /* ------------------------------------------------------------- */
328 /* internal temporary structures */
329
330 /*
331 #define IMAGE_SCN_CNT_CODE 0x00000020
332 #define IMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040
333 #define IMAGE_SCN_CNT_UNINITIALIZED_DATA 0x00000080
334 #define IMAGE_SCN_MEM_DISCARDABLE 0x02000000
335 #define IMAGE_SCN_MEM_SHARED 0x10000000
336 #define IMAGE_SCN_MEM_EXECUTE 0x20000000
337 #define IMAGE_SCN_MEM_READ 0x40000000
338 #define IMAGE_SCN_MEM_WRITE 0x80000000
339 */
340
341 enum {
342 sec_text = 0,
343 sec_data ,
344 sec_bss ,
345 sec_idata ,
346 sec_rsrc ,
347 sec_stab ,
348 sec_reloc ,
349
350 sec_last
351 };
352
353 ST_DATA DWORD pe_sec_flags[] = {
354 0x60000020, /* ".text" , */
355 0xC0000040, /* ".data" , */
356 0xC0000080, /* ".bss" , */
357 0x40000040, /* ".idata" , */
358 0x40000040, /* ".rsrc" , */
359 0x42000802, /* ".stab" , */
360 0x42000040, /* ".reloc" , */
361 };
362
363 struct section_info {
364 int cls, ord;
365 char name[32];
366 DWORD sh_addr;
367 DWORD sh_size;
368 DWORD sh_flags;
369 unsigned char *data;
370 DWORD data_size;
371 IMAGE_SECTION_HEADER ish;
372 };
373
374 struct import_symbol {
375 int sym_index;
376 int iat_index;
377 int thk_offset;
378 };
379
380 struct pe_import_info {
381 int dll_index;
382 int sym_count;
383 struct import_symbol **symbols;
384 };
385
386 struct pe_info {
387 TCCState *s1;
388 Section *reloc;
389 Section *thunk;
390 const char *filename;
391 int type;
392 DWORD sizeofheaders;
393 DWORD imagebase;
394 DWORD start_addr;
395 DWORD imp_offs;
396 DWORD imp_size;
397 DWORD iat_offs;
398 DWORD iat_size;
399 DWORD exp_offs;
400 DWORD exp_size;
401 struct section_info *sec_info;
402 int sec_count;
403 struct pe_import_info **imp_info;
404 int imp_count;
405 };
406
407 /* ------------------------------------------------------------- */
408
409 #define PE_NUL 0
410 #define PE_DLL 1
411 #define PE_GUI 2
412 #define PE_EXE 3
413
414 void error_noabort(const char *, ...);
415
416 #ifdef _WIN32
417 void dbg_printf (const char *fmt, ...)
418 {
419 char buffer[4000];
420 va_list arg;
421 int x;
422 va_start(arg, fmt);
423 x = vsprintf (buffer, fmt, arg);
424 strcpy(buffer+x, "\n");
425 OutputDebugString(buffer);
426 }
427 #endif
428
429 /* --------------------------------------------*/
430
431 ST_FN const char* get_alt_symbol(char *buffer, const char *symbol)
432 {
433 const char *p;
434 p = strrchr(symbol, '@');
435 if (p && isnum(p[1]) && symbol[0] == '_') { /* stdcall decor */
436 strcpy(buffer, symbol+1)[p-symbol-1] = 0;
437 } else if (symbol[0] != '_') { /* try non-ansi function */
438 buffer[0] = '_', strcpy(buffer + 1, symbol);
439 } else if (0 == memcmp(symbol, "__imp__", 7)) { /* mingw 2.0 */
440 strcpy(buffer, symbol + 6);
441 } else if (0 == memcmp(symbol, "_imp___", 7)) { /* mingw 3.7 */
442 strcpy(buffer, symbol + 6);
443 } else {
444 return symbol;
445 }
446 return buffer;
447 }
448
449 ST_FN int pe_find_import(TCCState * s1, const char *symbol)
450 {
451 char buffer[200];
452 const char *s;
453 int sym_index, n = 0;
454 do {
455 s = n ? get_alt_symbol(buffer, symbol) : symbol;
456 sym_index = find_elf_sym(s1->dynsymtab_section, s);
457 // printf("find %d %s\n", sym_index, s);
458 } while (0 == sym_index && ++n < 2);
459 return sym_index;
460 }
461
462 #if defined _WIN32 || defined __CYGWIN__
463
464 #ifdef __CYGWIN__
465 # include <dlfcn.h>
466 # define LoadLibrary(s) dlopen(s, RTLD_NOW)
467 # define GetProcAddress(h,s) dlsym(h, s)
468 #else
469 # define dlclose(h) FreeLibrary(h)
470 #endif
471
472 /* for the -run option: dynamically load symbol from dll */
473 void *resolve_sym(struct TCCState *s1, const char *symbol, int type)
474 {
475 char buffer[100];
476 int sym_index, dll_index;
477 void *addr, **m;
478 DLLReference *dllref;
479
480 sym_index = pe_find_import(s1, symbol);
481 if (0 == sym_index)
482 return NULL;
483 dll_index = ((Elf32_Sym *)s1->dynsymtab_section->data + sym_index)->st_value;
484 dllref = s1->loaded_dlls[dll_index-1];
485 if ( !dllref->handle )
486 {
487 dllref->handle = LoadLibrary(dllref->name);
488 }
489 addr = GetProcAddress(dllref->handle, symbol);
490 if (NULL == addr)
491 addr = GetProcAddress(dllref->handle, get_alt_symbol(buffer, symbol));
492
493 if (addr && STT_OBJECT == type) {
494 /* need to return a pointer to the address for data objects */
495 m = (void**)tcc_malloc(sizeof addr), *m = addr, addr = m;
496 #ifdef MEM_DEBUG
497 /* yep, we don't free it */
498 mem_cur_size -= sizeof (void*);
499 #endif
500 }
501 return addr;
502 }
503 #endif
504
505 /*----------------------------------------------------------------------------*/
506
507 ST_FN int dynarray_assoc(void **pp, int n, int key)
508 {
509 int i;
510 for (i = 0; i < n; ++i, ++pp)
511 if (key == **(int **) pp)
512 return i;
513 return -1;
514 }
515
516 #if 0
517 ST_FN DWORD umin(DWORD a, DWORD b)
518 {
519 return a < b ? a : b;
520 }
521 #endif
522
523 ST_FN DWORD umax(DWORD a, DWORD b)
524 {
525 return a < b ? b : a;
526 }
527
528 ST_FN void pe_fpad(FILE *fp, DWORD new_pos)
529 {
530 DWORD pos = ftell(fp);
531 while (++pos <= new_pos)
532 fputc(0, fp);
533 }
534
535 ST_FN DWORD pe_file_align(DWORD n)
536 {
537 return (n + (0x200 - 1)) & ~(0x200 - 1);
538 }
539
540 ST_FN DWORD pe_virtual_align(DWORD n)
541 {
542 return (n + (0x1000 - 1)) & ~(0x1000 - 1);
543 }
544
545 ST_FN void pe_align_section(Section *s, int a)
546 {
547 int i = s->data_offset & (a-1);
548 if (i)
549 section_ptr_add(s, a - i);
550 }
551
552 ST_FN void pe_set_datadir(int dir, DWORD addr, DWORD size)
553 {
554 pe_header.opthdr.DataDirectory[dir].VirtualAddress = addr;
555 pe_header.opthdr.DataDirectory[dir].Size = size;
556 }
557
558 /*----------------------------------------------------------------------------*/
559 ST_FN int pe_write(struct pe_info *pe)
560 {
561 int i;
562 FILE *op;
563 DWORD file_offset, r;
564
565 op = fopen(pe->filename, "wb");
566 if (NULL == op) {
567 error_noabort("could not write '%s': %s", pe->filename, strerror(errno));
568 return 1;
569 }
570
571 pe->sizeofheaders = pe_file_align(
572 sizeof pe_header
573 + pe->sec_count * sizeof (IMAGE_SECTION_HEADER)
574 );
575
576 file_offset = pe->sizeofheaders;
577 pe_fpad(op, file_offset);
578
579 if (2 == verbose)
580 printf("-------------------------------"
581 "\n virt file size section" "\n");
582
583 for (i = 0; i < pe->sec_count; ++i) {
584 struct section_info *si = pe->sec_info + i;
585 const char *sh_name = si->name;
586 unsigned long addr = si->sh_addr - pe->imagebase;
587 unsigned long size = si->sh_size;
588 IMAGE_SECTION_HEADER *psh = &si->ish;
589
590 if (2 == verbose)
591 printf("%6lx %6lx %6lx %s\n",
592 addr, file_offset, size, sh_name);
593
594 switch (si->cls) {
595 case sec_text:
596 pe_header.opthdr.BaseOfCode = addr;
597 pe_header.opthdr.AddressOfEntryPoint = addr + pe->start_addr;
598 break;
599
600 case sec_data:
601 pe_header.opthdr.BaseOfData = addr;
602 break;
603
604 case sec_bss:
605 break;
606
607 case sec_reloc:
608 pe_set_datadir(IMAGE_DIRECTORY_ENTRY_BASERELOC, addr, size);
609 break;
610
611 case sec_rsrc:
612 pe_set_datadir(IMAGE_DIRECTORY_ENTRY_RESOURCE, addr, size);
613 break;
614
615 case sec_stab:
616 break;
617 }
618
619 if (pe->thunk == pe->s1->sections[si->ord]) {
620 if (pe->imp_size) {
621 pe_set_datadir(IMAGE_DIRECTORY_ENTRY_IMPORT,
622 pe->imp_offs + addr, pe->imp_size);
623 pe_set_datadir(IMAGE_DIRECTORY_ENTRY_IAT,
624 pe->iat_offs + addr, pe->iat_size);
625 }
626 if (pe->exp_size) {
627 pe_set_datadir(IMAGE_DIRECTORY_ENTRY_EXPORT,
628 pe->exp_offs + addr, pe->exp_size);
629 }
630 }
631
632 strcpy((char*)psh->Name, sh_name);
633
634 psh->Characteristics = pe_sec_flags[si->cls];
635 psh->VirtualAddress = addr;
636 psh->Misc.VirtualSize = size;
637 pe_header.opthdr.SizeOfImage =
638 umax(pe_virtual_align(size + addr), pe_header.opthdr.SizeOfImage);
639
640 if (si->data_size) {
641 psh->PointerToRawData = r = file_offset;
642 fwrite(si->data, 1, si->data_size, op);
643 file_offset = pe_file_align(file_offset + si->data_size);
644 psh->SizeOfRawData = file_offset - r;
645 pe_fpad(op, file_offset);
646 }
647 }
648
649 // pe_header.filehdr.TimeDateStamp = time(NULL);
650 pe_header.filehdr.NumberOfSections = pe->sec_count;
651 pe_header.opthdr.SizeOfHeaders = pe->sizeofheaders;
652 pe_header.opthdr.ImageBase = pe->imagebase;
653 if (PE_DLL == pe->type)
654 pe_header.filehdr.Characteristics = 0x230E;
655 else if (PE_GUI != pe->type)
656 pe_header.opthdr.Subsystem = 3;
657
658 fseek(op, SEEK_SET, 0);
659 fwrite(&pe_header, 1, sizeof pe_header, op);
660 for (i = 0; i < pe->sec_count; ++i)
661 fwrite(&pe->sec_info[i].ish, 1, sizeof(IMAGE_SECTION_HEADER), op);
662 fclose (op);
663
664 if (2 == verbose)
665 printf("-------------------------------\n");
666 if (verbose)
667 printf("<- %s (%lu bytes)\n", pe->filename, file_offset);
668
669 return 0;
670 }
671
672 /*----------------------------------------------------------------------------*/
673
674 ST_FN struct import_symbol *pe_add_import(struct pe_info *pe, int sym_index)
675 {
676 int i;
677 int dll_index;
678 struct pe_import_info *p;
679 struct import_symbol *s;
680
681 dll_index = ((Elf32_Sym *)pe->s1->dynsymtab_section->data + sym_index)->st_value;
682 if (0 == dll_index)
683 return NULL;
684
685 i = dynarray_assoc ((void**)pe->imp_info, pe->imp_count, dll_index);
686 if (-1 != i) {
687 p = pe->imp_info[i];
688 goto found_dll;
689 }
690 p = tcc_mallocz(sizeof *p);
691 p->dll_index = dll_index;
692 dynarray_add((void***)&pe->imp_info, &pe->imp_count, p);
693
694 found_dll:
695 i = dynarray_assoc ((void**)p->symbols, p->sym_count, sym_index);
696 if (-1 != i)
697 return p->symbols[i];
698
699 s = tcc_mallocz(sizeof *s);
700 dynarray_add((void***)&p->symbols, &p->sym_count, s);
701 s->sym_index = sym_index;
702 return s;
703 }
704
705 /*----------------------------------------------------------------------------*/
706 ST_FN void pe_build_imports(struct pe_info *pe)
707 {
708 int thk_ptr, ent_ptr, dll_ptr, sym_cnt, i;
709 DWORD rva_base = pe->thunk->sh_addr - pe->imagebase;
710 int ndlls = pe->imp_count;
711
712 for (sym_cnt = i = 0; i < ndlls; ++i)
713 sym_cnt += pe->imp_info[i]->sym_count;
714
715 if (0 == sym_cnt)
716 return;
717
718 pe_align_section(pe->thunk, 16);
719
720 pe->imp_offs = dll_ptr = pe->thunk->data_offset;
721 pe->imp_size = (ndlls + 1) * sizeof(struct pe_import_header);
722 pe->iat_offs = dll_ptr + pe->imp_size;
723 pe->iat_size = (sym_cnt + ndlls) * sizeof(DWORD);
724 section_ptr_add(pe->thunk, pe->imp_size + 2*pe->iat_size);
725
726 thk_ptr = pe->iat_offs;
727 ent_ptr = pe->iat_offs + pe->iat_size;
728
729 for (i = 0; i < pe->imp_count; ++i) {
730 struct pe_import_header *hdr;
731 int k, n, v;
732 struct pe_import_info *p = pe->imp_info[i];
733 const char *name = pe->s1->loaded_dlls[p->dll_index-1]->name;
734
735 /* put the dll name into the import header */
736 v = put_elf_str(pe->thunk, name);
737
738 hdr = (struct pe_import_header*)(pe->thunk->data + dll_ptr);
739 hdr->first_thunk = thk_ptr + rva_base;
740 hdr->first_entry = ent_ptr + rva_base;
741 hdr->lib_name_offset = v + rva_base;
742
743 for (k = 0, n = p->sym_count; k <= n; ++k) {
744 if (k < n) {
745 DWORD iat_index = p->symbols[k]->iat_index;
746 int sym_index = p->symbols[k]->sym_index;
747 Elf32_Sym *imp_sym = (Elf32_Sym *)pe->s1->dynsymtab_section->data + sym_index;
748 Elf32_Sym *org_sym = (Elf32_Sym *)symtab_section->data + iat_index;
749 const char *name = pe->s1->dynsymtab_section->link->data + imp_sym->st_name;
750
751 org_sym->st_value = thk_ptr;
752 org_sym->st_shndx = pe->thunk->sh_num;
753 v = pe->thunk->data_offset + rva_base;
754 section_ptr_add(pe->thunk, sizeof(WORD)); /* hint, not used */
755 put_elf_str(pe->thunk, name);
756
757 } else {
758 v = 0; /* last entry is zero */
759 }
760 *(DWORD*)(pe->thunk->data+thk_ptr) =
761 *(DWORD*)(pe->thunk->data+ent_ptr) = v;
762 thk_ptr += sizeof (DWORD);
763 ent_ptr += sizeof (DWORD);
764 }
765 dll_ptr += sizeof(struct pe_import_header);
766 dynarray_reset(&p->symbols, &p->sym_count);
767 }
768 dynarray_reset(&pe->imp_info, &pe->imp_count);
769 }
770
771 /* ------------------------------------------------------------- */
772 /*
773 For now only functions are exported. Export of data
774 would work, but import requires compiler support to
775 do an additional indirection.
776
777 For instance:
778 __declspec(dllimport) extern int something;
779
780 needs to be translated to:
781
782 *(int*)something
783 */
784
785 ST_FN int sym_cmp(const void *va, const void *vb)
786 {
787 const char *ca = ((const char **)va)[1];
788 const char *cb = ((const char **)vb)[1];
789 return strcmp(ca, cb);
790 }
791
792 ST_FN void pe_build_exports(struct pe_info *pe)
793 {
794 Elf32_Sym *sym;
795 int sym_index, sym_end;
796 DWORD rva_base, func_o, name_o, ord_o, str_o;
797 struct pe_export_header *hdr;
798 int sym_count, n, ord, *sorted, *sp;
799
800 FILE *op;
801 char buf[MAX_PATH];
802 const char *dllname;
803 const char *name;
804
805 rva_base = pe->thunk->sh_addr - pe->imagebase;
806 sym_count = 0, n = 1, sorted = NULL, op = NULL;
807
808 sym_end = symtab_section->data_offset / sizeof(Elf32_Sym);
809 for (sym_index = 1; sym_index < sym_end; ++sym_index) {
810 sym = (Elf32_Sym*)symtab_section->data + sym_index;
811 name = symtab_section->link->data + sym->st_name;
812 if ((sym->st_other & 1)
813 /* export only symbols from actually written sections */
814 && pe->s1->sections[sym->st_shndx]->sh_addr) {
815 dynarray_add((void***)&sorted, &sym_count, (void*)n);
816 dynarray_add((void***)&sorted, &sym_count, (void*)name);
817 }
818 ++n;
819 #if 0
820 if (sym->st_other & 1)
821 printf("export: %s\n", name);
822 if (sym->st_other & 2)
823 printf("stdcall: %s\n", name);
824 #endif
825 }
826
827 if (0 == sym_count)
828 return;
829 sym_count /= 2;
830
831 qsort (sorted, sym_count, 2 * sizeof sorted[0], sym_cmp);
832 pe_align_section(pe->thunk, 16);
833 dllname = tcc_basename(pe->filename);
834
835 pe->exp_offs = pe->thunk->data_offset;
836 func_o = pe->exp_offs + sizeof(struct pe_export_header);
837 name_o = func_o + sym_count * sizeof (DWORD);
838 ord_o = name_o + sym_count * sizeof (DWORD);
839 str_o = ord_o + sym_count * sizeof(WORD);
840
841 hdr = section_ptr_add(pe->thunk, str_o - pe->exp_offs);
842 hdr->Characteristics = 0;
843 hdr->Base = 1;
844 hdr->NumberOfFunctions = sym_count;
845 hdr->NumberOfNames = sym_count;
846 hdr->AddressOfFunctions = func_o + rva_base;
847 hdr->AddressOfNames = name_o + rva_base;
848 hdr->AddressOfNameOrdinals = ord_o + rva_base;
849 hdr->Name = str_o + rva_base;
850 put_elf_str(pe->thunk, dllname);
851
852 #if 1
853 /* automatically write exports to <output-filename>.def */
854 strcpy(buf, pe->filename);
855 strcpy(tcc_fileextension(buf), ".def");
856 op = fopen(buf, "w");
857 if (NULL == op) {
858 error_noabort("could not create '%s': %s", buf, strerror(errno));
859 } else {
860 fprintf(op, "LIBRARY %s\n\nEXPORTS\n", dllname);
861 if (verbose)
862 printf("<- %s (%d symbols)\n", buf, sym_count);
863 }
864 #endif
865
866 for (sp = sorted, ord = 0; ord < sym_count; ++ord, sp += 2)
867 {
868 sym_index = sp[0], name = (const char *)sp[1];
869 /* insert actual address later in pe_relocate_rva */
870 put_elf_reloc(symtab_section, pe->thunk,
871 func_o, R_386_RELATIVE, sym_index);
872 *(DWORD*)(pe->thunk->data + name_o)
873 = pe->thunk->data_offset + rva_base;
874 *(WORD*)(pe->thunk->data + ord_o)
875 = ord;
876 put_elf_str(pe->thunk, name);
877 func_o += sizeof (DWORD);
878 name_o += sizeof (DWORD);
879 ord_o += sizeof (WORD);
880
881 if (op)
882 fprintf(op, "%s\n", name);
883 }
884 pe->exp_size = pe->thunk->data_offset - pe->exp_offs;
885 tcc_free(sorted);
886 }
887
888 /* ------------------------------------------------------------- */
889 ST_FN void pe_build_reloc (struct pe_info *pe)
890 {
891 DWORD offset, block_ptr, addr;
892 int count, i;
893 Elf32_Rel *rel, *rel_end;
894 Section *s = NULL, *sr;
895
896 offset = addr = block_ptr = count = i = 0;
897 rel = rel_end = NULL;
898
899 for(;;) {
900 if (rel < rel_end) {
901 int type = ELF32_R_TYPE(rel->r_info);
902 addr = rel->r_offset + s->sh_addr;
903 ++ rel;
904 if (type != R_386_32)
905 continue;
906 if (count == 0) { /* new block */
907 block_ptr = pe->reloc->data_offset;
908 section_ptr_add(pe->reloc, sizeof(struct pe_reloc_header));
909 offset = addr & 0xFFFFFFFF<<12;
910 }
911 if ((addr -= offset) < (1<<12)) { /* one block spans 4k addresses */
912 WORD *wp = section_ptr_add(pe->reloc, sizeof (WORD));
913 *wp = addr | IMAGE_REL_BASED_HIGHLOW<<12;
914 ++count;
915 continue;
916 }
917 -- rel;
918
919 } else if (i < pe->sec_count) {
920 sr = (s = pe->s1->sections[pe->sec_info[i++].ord])->reloc;
921 if (sr) {
922 rel = (Elf32_Rel *)sr->data;
923 rel_end = (Elf32_Rel *)(sr->data + sr->data_offset);
924 }
925 continue;
926 }
927
928 if (count) {
929 /* store the last block and ready for a new one */
930 struct pe_reloc_header *hdr;
931 if (count & 1) /* align for DWORDS */
932 section_ptr_add(pe->reloc, sizeof(WORD)), ++count;
933 hdr = (struct pe_reloc_header *)(pe->reloc->data + block_ptr);
934 hdr -> offset = offset - pe->imagebase;
935 hdr -> size = count * sizeof(WORD) + sizeof(struct pe_reloc_header);
936 count = 0;
937 }
938
939 if (rel >= rel_end)
940 break;
941 }
942 }
943
944 /* ------------------------------------------------------------- */
945 ST_FN int pe_section_class(Section *s)
946 {
947 int type, flags;
948 const char *name;
949
950 type = s->sh_type;
951 flags = s->sh_flags;
952 name = s->name;
953 if (flags & SHF_ALLOC) {
954 if (type == SHT_PROGBITS) {
955 if (flags & SHF_EXECINSTR)
956 return sec_text;
957 if (flags & SHF_WRITE)
958 return sec_data;
959 if (0 == strcmp(name, ".rsrc"))
960 return sec_rsrc;
961 if (0 == strcmp(name, ".iedat"))
962 return sec_idata;
963 } else if (type == SHT_NOBITS) {
964 if (flags & SHF_WRITE)
965 return sec_bss;
966 }
967 } else {
968 if (0 == strcmp(name, ".reloc"))
969 return sec_reloc;
970 if (0 == strncmp(name, ".stab", 5)) /* .stab and .stabstr */
971 return sec_stab;
972 }
973 return -1;
974 }
975
976 ST_FN int pe_assign_addresses (struct pe_info *pe)
977 {
978 int i, k, o, c;
979 DWORD addr;
980 int *section_order;
981 struct section_info *si;
982 Section *s;
983
984 // pe->thunk = new_section(pe->s1, ".iedat", SHT_PROGBITS, SHF_ALLOC);
985
986 section_order = tcc_malloc(pe->s1->nb_sections * sizeof (int));
987 for (o = k = 0 ; k < sec_last; ++k) {
988 for (i = 1; i < pe->s1->nb_sections; ++i) {
989 s = pe->s1->sections[i];
990 if (k == pe_section_class(s)) {
991 // printf("%s %d\n", s->name, k);
992 s->sh_addr = pe->imagebase;
993 section_order[o++] = i;
994 }
995 }
996 }
997
998 pe->sec_info = tcc_mallocz(o * sizeof (struct section_info));
999 addr = pe->imagebase + 1;
1000
1001 for (i = 0; i < o; ++i)
1002 {
1003 k = section_order[i];
1004 s = pe->s1->sections[k];
1005 c = pe_section_class(s);
1006 si = &pe->sec_info[pe->sec_count];
1007
1008 #ifdef PE_MERGE_DATA
1009 if (c == sec_bss && pe->sec_count && si[-1].cls == sec_data) {
1010 /* append .bss to .data */
1011 s->sh_addr = addr = ((addr-1) | 15) + 1;
1012 addr += s->data_offset;
1013 si[-1].sh_size = addr - si[-1].sh_addr;
1014 continue;
1015 }
1016 #endif
1017 strcpy(si->name, s->name);
1018 si->cls = c;
1019 si->ord = k;
1020 si->sh_addr = s->sh_addr = addr = pe_virtual_align(addr);
1021 si->sh_flags = s->sh_flags;
1022
1023 if (c == sec_data && NULL == pe->thunk)
1024 pe->thunk = s;
1025
1026 if (s == pe->thunk) {
1027 pe_build_imports(pe);
1028 pe_build_exports(pe);
1029 }
1030
1031 if (c == sec_reloc)
1032 pe_build_reloc (pe);
1033
1034 if (s->data_offset)
1035 {
1036 if (s->sh_type != SHT_NOBITS) {
1037 si->data = s->data;
1038 si->data_size = s->data_offset;
1039 }
1040
1041 addr += s->data_offset;
1042 si->sh_size = s->data_offset;
1043 ++pe->sec_count;
1044 }
1045 // printf("%08x %05x %s\n", si->sh_addr, si->sh_size, si->name);
1046 }
1047
1048 #if 0
1049 for (i = 1; i < pe->s1->nb_sections; ++i) {
1050 Section *s = pe->s1->sections[i];
1051 int type = s->sh_type;
1052 int flags = s->sh_flags;
1053 printf("section %-16s %-10s %5x %s,%s,%s\n",
1054 s->name,
1055 type == SHT_PROGBITS ? "progbits" :
1056 type == SHT_NOBITS ? "nobits" :
1057 type == SHT_SYMTAB ? "symtab" :
1058 type == SHT_STRTAB ? "strtab" :
1059 type == SHT_REL ? "rel" : "???",
1060 s->data_offset,
1061 flags & SHF_ALLOC ? "alloc" : "",
1062 flags & SHF_WRITE ? "write" : "",
1063 flags & SHF_EXECINSTR ? "exec" : ""
1064 );
1065 }
1066 verbose = 2;
1067 #endif
1068
1069 tcc_free(section_order);
1070 return 0;
1071 }
1072
1073 /* ------------------------------------------------------------- */
1074 ST_FN void pe_relocate_rva (struct pe_info *pe, Section *s)
1075 {
1076 Section *sr = s->reloc;
1077 Elf32_Rel *rel, *rel_end;
1078 rel_end = (Elf32_Rel *)(sr->data + sr->data_offset);
1079 for(rel = (Elf32_Rel *)sr->data; rel < rel_end; rel++)
1080 if (ELF32_R_TYPE(rel->r_info) == R_386_RELATIVE) {
1081 int sym_index = ELF32_R_SYM(rel->r_info);
1082 DWORD addr = s->sh_addr;
1083 if (sym_index) {
1084 Elf32_Sym *sym = (Elf32_Sym *)symtab_section->data + sym_index;
1085 addr = sym->st_value;
1086 }
1087 *(DWORD*)(s->data + rel->r_offset) += addr - pe->imagebase;
1088 }
1089 }
1090
1091 /*----------------------------------------------------------------------------*/
1092 ST_FN int pe_check_symbols(struct pe_info *pe)
1093 {
1094 Elf32_Sym *sym;
1095 int sym_index, sym_end;
1096 int ret = 0;
1097
1098 pe_align_section(text_section, 8);
1099
1100 sym_end = symtab_section->data_offset / sizeof(Elf32_Sym);
1101 for (sym_index = 1; sym_index < sym_end; ++sym_index) {
1102
1103 sym = (Elf32_Sym*)symtab_section->data + sym_index;
1104 if (sym->st_shndx == SHN_UNDEF) {
1105
1106 const char *name = symtab_section->link->data + sym->st_name;
1107 unsigned type = ELF32_ST_TYPE(sym->st_info);
1108 int imp_sym = pe_find_import(pe->s1, name);
1109 struct import_symbol *is;
1110
1111 if (0 == imp_sym)
1112 goto not_found;
1113 is = pe_add_import(pe, imp_sym);
1114 if (!is)
1115 goto not_found;
1116
1117 if (type == STT_FUNC) {
1118 unsigned long offset = is->thk_offset;
1119 if (offset) {
1120 /* got aliased symbol, like stricmp and _stricmp */
1121
1122 } else {
1123 char buffer[100];
1124
1125 offset = text_section->data_offset;
1126 /* add the 'jmp IAT[x]' instruction */
1127 *(WORD*)section_ptr_add(text_section, 8) = 0x25FF;
1128
1129 /* add a helper symbol, will be patched later in
1130 pe_build_imports */
1131 sprintf(buffer, "IAT.%s", name);
1132 is->iat_index = put_elf_sym(
1133 symtab_section, 0, sizeof(DWORD),
1134 ELF32_ST_INFO(STB_GLOBAL, STT_OBJECT),
1135 0, SHN_UNDEF, buffer);
1136 put_elf_reloc(symtab_section, text_section,
1137 offset + 2, R_386_32, is->iat_index);
1138 is->thk_offset = offset;
1139 }
1140
1141 /* tcc_realloc might have altered sym's address */
1142 sym = (Elf32_Sym*)symtab_section->data + sym_index;
1143
1144 /* patch the original symbol */
1145 sym->st_value = offset;
1146 sym->st_shndx = text_section->sh_num;
1147 sym->st_other &= ~1; /* do not export */
1148 continue;
1149 }
1150
1151 if (type == STT_OBJECT) { /* data, ptr to that should be */
1152 if (0 == is->iat_index) {
1153 /* original symbol will be patched later in pe_build_imports */
1154 is->iat_index = sym_index;
1155 continue;
1156 }
1157 }
1158
1159 not_found:
1160 error_noabort("undefined symbol '%s'", name);
1161 ret = 1;
1162
1163 } else if (pe->s1->rdynamic
1164 && ELF32_ST_BIND(sym->st_info) != STB_LOCAL) {
1165 /* if -rdynamic option, then export all non local symbols */
1166 sym->st_other |= 1;
1167 }
1168 }
1169 return ret;
1170 }
1171
1172 /*----------------------------------------------------------------------------*/
1173 #ifdef PE_PRINT_SECTIONS
1174 ST_FN void pe_print_section(FILE * f, Section * s)
1175 {
1176 /* just if you'r curious */
1177 BYTE *p, *e, b;
1178 int i, n, l, m;
1179 p = s->data;
1180 e = s->data + s->data_offset;
1181 l = e - p;
1182
1183 fprintf(f, "section \"%s\"", s->name);
1184 if (s->link)
1185 fprintf(f, "\nlink \"%s\"", s->link->name);
1186 if (s->reloc)
1187 fprintf(f, "\nreloc \"%s\"", s->reloc->name);
1188 fprintf(f, "\nv_addr %08X", s->sh_addr);
1189 fprintf(f, "\ncontents %08X", l);
1190 fprintf(f, "\n\n");
1191
1192 if (s->sh_type == SHT_NOBITS)
1193 return;
1194
1195 if (0 == l)
1196 return;
1197
1198 if (s->sh_type == SHT_SYMTAB)
1199 m = sizeof(Elf32_Sym);
1200 if (s->sh_type == SHT_REL)
1201 m = sizeof(Elf32_Rel);
1202 else
1203 m = 16;
1204
1205 fprintf(f, "%-8s", "offset");
1206 for (i = 0; i < m; ++i)
1207 fprintf(f, " %02x", i);
1208 n = 56;
1209
1210 if (s->sh_type == SHT_SYMTAB || s->sh_type == SHT_REL) {
1211 const char *fields1[] = {
1212 "name",
1213 "value",
1214 "size",
1215 "bind",
1216 "type",
1217 "other",
1218 "shndx",
1219 NULL
1220 };
1221
1222 const char *fields2[] = {
1223 "offs",
1224 "type",
1225 "symb",
1226 NULL
1227 };
1228
1229 const char **p;
1230
1231 if (s->sh_type == SHT_SYMTAB)
1232 p = fields1, n = 106;
1233 else
1234 p = fields2, n = 58;
1235
1236 for (i = 0; p[i]; ++i)
1237 fprintf(f, "%6s", p[i]);
1238 fprintf(f, " symbol");
1239 }
1240
1241 fprintf(f, "\n");
1242 for (i = 0; i < n; ++i)
1243 fprintf(f, "-");
1244 fprintf(f, "\n");
1245
1246 for (i = 0; i < l;)
1247 {
1248 fprintf(f, "%08X", i);
1249 for (n = 0; n < m; ++n) {
1250 if (n + i < l)
1251 fprintf(f, " %02X", p[i + n]);
1252 else
1253 fprintf(f, " ");
1254 }
1255
1256 if (s->sh_type == SHT_SYMTAB) {
1257 Elf32_Sym *sym = (Elf32_Sym *) (p + i);
1258 const char *name = s->link->data + sym->st_name;
1259 fprintf(f, " %04X %04X %04X %02X %02X %02X %04X \"%s\"",
1260 sym->st_name,
1261 sym->st_value,
1262 sym->st_size,
1263 ELF32_ST_BIND(sym->st_info),
1264 ELF32_ST_TYPE(sym->st_info),
1265 sym->st_other, sym->st_shndx, name);
1266
1267 } else if (s->sh_type == SHT_REL) {
1268 Elf32_Rel *rel = (Elf32_Rel *) (p + i);
1269 Elf32_Sym *sym =
1270 (Elf32_Sym *) s->link->data + ELF32_R_SYM(rel->r_info);
1271 const char *name = s->link->link->data + sym->st_name;
1272 fprintf(f, " %04X %02X %04X \"%s\"",
1273 rel->r_offset,
1274 ELF32_R_TYPE(rel->r_info),
1275 ELF32_R_SYM(rel->r_info), name);
1276 } else {
1277 fprintf(f, " ");
1278 for (n = 0; n < m; ++n) {
1279 if (n + i < l) {
1280 b = p[i + n];
1281 if (b < 32 || b >= 127)
1282 b = '.';
1283 fprintf(f, "%c", b);
1284 }
1285 }
1286 }
1287 i += m;
1288 fprintf(f, "\n");
1289 }
1290 fprintf(f, "\n\n");
1291 }
1292
1293 ST_FN void pe_print_sections(TCCState *s1, const char *fname)
1294 {
1295 Section *s;
1296 FILE *f;
1297 int i;
1298 f = fopen(fname, "wt");
1299 for (i = 1; i < s1->nb_sections; ++i) {
1300 s = s1->sections[i];
1301 pe_print_section(f, s);
1302 }
1303 pe_print_section(f, s1->dynsymtab_section);
1304 fclose(f);
1305 }
1306 #endif
1307
1308 /* -------------------------------------------------------------
1309 * This is for compiled windows resources in 'coff' format
1310 * as generated by 'windres.exe -O coff ...'.
1311 */
1312
1313 PUB_FN int pe_test_res_file(void *v, int size)
1314 {
1315 struct pe_rsrc_header *p = (struct pe_rsrc_header *)v;
1316 return
1317 size >= IMAGE_SIZEOF_FILE_HEADER + IMAGE_SIZEOF_SHORT_NAME /* = 28 */
1318 && p->filehdr.Machine == 0x014C
1319 && 1 == p->filehdr.NumberOfSections
1320 && 0 == strcmp(p->sectionhdr.Name, ".rsrc")
1321 ;
1322 }
1323
1324 ST_FN int read_n(int fd, void *ptr, unsigned size)
1325 {
1326 return size == read(fd, ptr, size);
1327 }
1328
1329 PUB_FN int pe_load_res_file(TCCState *s1, int fd)
1330 {
1331 struct pe_rsrc_header hdr;
1332 Section *rsrc_section;
1333 int i, ret = -1;
1334 BYTE *ptr;
1335
1336 lseek (fd, 0, SEEK_SET);
1337 if (!read_n(fd, &hdr, sizeof hdr))
1338 goto quit;
1339 if (!pe_test_res_file(&hdr, sizeof hdr))
1340 goto quit;
1341
1342 rsrc_section = new_section(s1, ".rsrc", SHT_PROGBITS, SHF_ALLOC);
1343 ptr = section_ptr_add(rsrc_section, hdr.sectionhdr.SizeOfRawData);
1344 lseek (fd, hdr.sectionhdr.PointerToRawData, SEEK_SET);
1345 if (!read_n(fd, ptr, hdr.sectionhdr.SizeOfRawData))
1346 goto quit;
1347
1348 lseek (fd, hdr.sectionhdr.PointerToRelocations, SEEK_SET);
1349 for (i = 0; i < hdr.sectionhdr.NumberOfRelocations; ++i)
1350 {
1351 struct pe_rsrc_reloc rel;
1352 if (!read_n(fd, &rel, sizeof rel))
1353 goto quit;
1354 // printf("rsrc_reloc: %x %x %x\n", rel.offset, rel.size, rel.type);
1355 if (rel.type != 7) /* DIR32NB */
1356 goto quit;
1357 put_elf_reloc(symtab_section, rsrc_section,
1358 rel.offset, R_386_RELATIVE, 0);
1359 }
1360 ret = 0;
1361 quit:
1362 if (ret)
1363 error_noabort("unrecognized resource file format");
1364 return ret;
1365 }
1366
1367 /* ------------------------------------------------------------- */
1368 ST_FN char *trimfront(char *p)
1369 {
1370 while (*p && (unsigned char)*p <= ' ')
1371 ++p;
1372 return p;
1373 }
1374
1375 ST_FN char *trimback(char *a, char *e)
1376 {
1377 while (e > a && (unsigned char)e[-1] <= ' ')
1378 --e;
1379 *e = 0;;
1380 return a;
1381 }
1382
1383 ST_FN char *get_line(char *line, int size, FILE *fp)
1384 {
1385 if (NULL == fgets(line, size, fp))
1386 return NULL;
1387 trimback(line, strchr(line, 0));
1388 return trimfront(line);
1389 }
1390
1391 /* ------------------------------------------------------------- */
1392 PUB_FN int pe_load_def_file(TCCState *s1, int fd)
1393 {
1394 DLLReference *dllref;
1395 int state = 0, ret = -1;
1396 char line[400], dllname[80], *p;
1397 FILE *fp = fdopen(dup(fd), "rb");
1398
1399 if (NULL == fp)
1400 goto quit;
1401
1402 for (;;) {
1403 p = get_line(line, sizeof line, fp);
1404 if (NULL == p)
1405 break;
1406 if (0 == *p || ';' == *p)
1407 continue;
1408 switch (state) {
1409 case 0:
1410 if (0 != strnicmp(p, "LIBRARY", 7))
1411 goto quit;
1412 strcpy(dllname, trimfront(p+7));
1413 ++state;
1414 continue;
1415
1416 case 1:
1417 if (0 != stricmp(p, "EXPORTS"))
1418 goto quit;
1419 ++state;
1420 continue;
1421
1422 case 2:
1423 dllref = tcc_mallocz(sizeof(DLLReference) + strlen(dllname));
1424 strcpy(dllref->name, dllname);
1425 dynarray_add((void ***) &s1->loaded_dlls, &s1->nb_loaded_dlls, dllref);
1426 ++state;
1427
1428 default:
1429 add_elf_sym(s1->dynsymtab_section,
1430 s1->nb_loaded_dlls, 0,
1431 ELF32_ST_INFO(STB_GLOBAL, STT_FUNC), 0,
1432 text_section->sh_num, p);
1433 continue;
1434 }
1435 }
1436 ret = 0;
1437 quit:
1438 if (fp)
1439 fclose(fp);
1440 if (ret)
1441 error_noabort("unrecognized export definition file format");
1442 return ret;
1443 }
1444
1445 /* ------------------------------------------------------------- */
1446
1447 ST_FN void pe_add_runtime_ex(TCCState *s1, struct pe_info *pe)
1448 {
1449 const char *start_symbol;
1450 unsigned long addr = 0;
1451 int pe_type = 0;
1452
1453 if (find_elf_sym(symtab_section, "_WinMain@16"))
1454 pe_type = PE_GUI;
1455 else
1456 if (TCC_OUTPUT_DLL == s1->output_type) {
1457 pe_type = PE_DLL;
1458 /* need this for 'tccelf.c:relocate_section()' */
1459 s1->output_type = TCC_OUTPUT_EXE;
1460 }
1461
1462 start_symbol =
1463 TCC_OUTPUT_MEMORY == s1->output_type
1464 ? PE_GUI == pe_type ? "_runwinmain" : NULL
1465 : PE_DLL == pe_type ? "__dllstart@12"
1466 : PE_GUI == pe_type ? "_winstart" : "_start"
1467 ;
1468
1469 /* grab the startup code from libtcc1 */
1470 if (start_symbol)
1471 add_elf_sym(symtab_section,
1472 0, 0,
1473 ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), 0,
1474 SHN_UNDEF, start_symbol);
1475
1476 if (0 == s1->nostdlib) {
1477 tcc_add_library(s1, "tcc1");
1478 #ifdef __CYGWIN__
1479 tcc_add_library(s1, "cygwin1");
1480 #else
1481 tcc_add_library(s1, "msvcrt");
1482 #endif
1483 tcc_add_library(s1, "kernel32");
1484 if (PE_DLL == pe_type || PE_GUI == pe_type) {
1485 tcc_add_library(s1, "user32");
1486 tcc_add_library(s1, "gdi32");
1487 }
1488 }
1489
1490 if (start_symbol) {
1491 addr = (unsigned long)tcc_get_symbol_err(s1, start_symbol);
1492 if (s1->output_type == TCC_OUTPUT_MEMORY && addr)
1493 /* for -run GUI's, put '_runwinmain' instead of 'main' */
1494 add_elf_sym(symtab_section,
1495 addr, 0,
1496 ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), 0,
1497 text_section->sh_num, "main");
1498 }
1499
1500 if (pe) {
1501 pe->type = pe_type;
1502 pe->start_addr = addr;
1503 }
1504 }
1505
1506 PUB_FN void pe_add_runtime(TCCState *s1)
1507 {
1508 pe_add_runtime_ex(s1, NULL);
1509 }
1510
1511 PUB_FN int pe_output_file(TCCState * s1, const char *filename)
1512 {
1513 int ret;
1514 struct pe_info pe;
1515 int i;
1516
1517 memset(&pe, 0, sizeof pe);
1518 pe.filename = filename;
1519 pe.s1 = s1;
1520
1521 pe_add_runtime_ex(s1, &pe);
1522 relocate_common_syms(); /* assign bss adresses */
1523 tcc_add_linker_symbols(s1);
1524
1525 ret = pe_check_symbols(&pe);
1526 if (0 == ret) {
1527 if (PE_DLL == pe.type) {
1528 pe.reloc = new_section(pe.s1, ".reloc", SHT_PROGBITS, 0);
1529 pe.imagebase = 0x10000000;
1530 } else {
1531 pe.imagebase = 0x00400000;
1532 }
1533 pe_assign_addresses(&pe);
1534 relocate_syms(s1, 0);
1535 for (i = 1; i < s1->nb_sections; ++i) {
1536 Section *s = s1->sections[i];
1537 if (s->reloc) {
1538 relocate_section(s1, s);
1539 pe_relocate_rva(&pe, s);
1540 }
1541 }
1542 if (s1->nb_errors)
1543 ret = 1;
1544 else
1545 ret = pe_write(&pe);
1546 tcc_free(pe.sec_info);
1547 }
1548
1549 #ifdef PE_PRINT_SECTIONS
1550 pe_print_sections(s1, "tcc.log");
1551 #endif
1552 return ret;
1553 }
1554
1555 /* ------------------------------------------------------------- */
1556 #endif /* def TCC_TARGET_PE */
1557 /* ------------------------------------------------------------- */
tinycc fork to help me test changes before commit to mob