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
dbg_printf(const char * fmt,...)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
get_alt_symbol(char * buffer,const char * symbol)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
pe_find_import(TCCState * s1,const char * symbol)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 #endif
469
470 /* for the -run option: dynamically load symbol from dll */
resolve_sym(struct TCCState * s1,const char * symbol,int type)471 void *resolve_sym(struct TCCState *s1, const char *symbol, int type)
472 {
473 char buffer[100];
474 int sym_index, dll_index;
475 void *hModule, *addr, **m;
476
477 sym_index = pe_find_import(s1, symbol);
478 if (0 == sym_index)
479 return NULL;
480 dll_index = ((Elf32_Sym *)s1->dynsymtab_section->data + sym_index)->st_value;
481 hModule = LoadLibrary(s1->loaded_dlls[dll_index-1]->name);
482 addr = GetProcAddress(hModule, symbol);
483 if (NULL == addr)
484 addr = GetProcAddress(hModule, get_alt_symbol(buffer, symbol));
485
486 if (addr && STT_OBJECT == type) {
487 /* need to return a pointer to the address for data objects */
488 m = (void**)tcc_malloc(sizeof addr), *m = addr, addr = m;
489 #ifdef MEM_DEBUG
490 /* yep, we don't free it */
491 mem_cur_size -= sizeof (void*);
492 #endif
493 }
494 return addr;
495 }
496 #endif
497
498 /*----------------------------------------------------------------------------*/
499
dynarray_assoc(void ** pp,int n,int key)500 ST_FN int dynarray_assoc(void **pp, int n, int key)
501 {
502 int i;
503 for (i = 0; i < n; ++i, ++pp)
504 if (key == **(int **) pp)
505 return i;
506 return -1;
507 }
508
509 #if 0
510 ST_FN DWORD umin(DWORD a, DWORD b)
511 {
512 return a < b ? a : b;
513 }
514 #endif
515
umax(DWORD a,DWORD b)516 ST_FN DWORD umax(DWORD a, DWORD b)
517 {
518 return a < b ? b : a;
519 }
520
pe_fpad(FILE * fp,DWORD new_pos)521 ST_FN void pe_fpad(FILE *fp, DWORD new_pos)
522 {
523 DWORD pos = ftell(fp);
524 while (++pos <= new_pos)
525 fputc(0, fp);
526 }
527
pe_file_align(DWORD n)528 ST_FN DWORD pe_file_align(DWORD n)
529 {
530 return (n + (0x200 - 1)) & ~(0x200 - 1);
531 }
532
pe_virtual_align(DWORD n)533 ST_FN DWORD pe_virtual_align(DWORD n)
534 {
535 return (n + (0x1000 - 1)) & ~(0x1000 - 1);
536 }
537
pe_align_section(Section * s,int a)538 ST_FN void pe_align_section(Section *s, int a)
539 {
540 int i = s->data_offset & (a-1);
541 if (i)
542 section_ptr_add(s, a - i);
543 }
544
pe_set_datadir(int dir,DWORD addr,DWORD size)545 ST_FN void pe_set_datadir(int dir, DWORD addr, DWORD size)
546 {
547 pe_header.opthdr.DataDirectory[dir].VirtualAddress = addr;
548 pe_header.opthdr.DataDirectory[dir].Size = size;
549 }
550
551 /*----------------------------------------------------------------------------*/
pe_write(struct pe_info * pe)552 ST_FN int pe_write(struct pe_info *pe)
553 {
554 int i;
555 FILE *op;
556 DWORD file_offset, r;
557
558 op = fopen(pe->filename, "wb");
559 if (NULL == op) {
560 error_noabort("could not write '%s': %s", pe->filename, strerror(errno));
561 return 1;
562 }
563
564 pe->sizeofheaders = pe_file_align(
565 sizeof pe_header
566 + pe->sec_count * sizeof (IMAGE_SECTION_HEADER)
567 );
568
569 file_offset = pe->sizeofheaders;
570 pe_fpad(op, file_offset);
571
572 if (2 == verbose)
573 printf("-------------------------------"
574 "\n virt file size section" "\n");
575
576 for (i = 0; i < pe->sec_count; ++i) {
577 struct section_info *si = pe->sec_info + i;
578 const char *sh_name = si->name;
579 unsigned long addr = si->sh_addr - pe->imagebase;
580 unsigned long size = si->sh_size;
581 IMAGE_SECTION_HEADER *psh = &si->ish;
582
583 if (2 == verbose)
584 printf("%6lx %6lx %6lx %s\n",
585 addr, file_offset, size, sh_name);
586
587 switch (si->cls) {
588 case sec_text:
589 pe_header.opthdr.BaseOfCode = addr;
590 pe_header.opthdr.AddressOfEntryPoint = addr + pe->start_addr;
591 break;
592
593 case sec_data:
594 pe_header.opthdr.BaseOfData = addr;
595 break;
596
597 case sec_bss:
598 break;
599
600 case sec_reloc:
601 pe_set_datadir(IMAGE_DIRECTORY_ENTRY_BASERELOC, addr, size);
602 break;
603
604 case sec_rsrc:
605 pe_set_datadir(IMAGE_DIRECTORY_ENTRY_RESOURCE, addr, size);
606 break;
607
608 case sec_stab:
609 break;
610 }
611
612 if (pe->thunk == pe->s1->sections[si->ord]) {
613 if (pe->imp_size) {
614 pe_set_datadir(IMAGE_DIRECTORY_ENTRY_IMPORT,
615 pe->imp_offs + addr, pe->imp_size);
616 pe_set_datadir(IMAGE_DIRECTORY_ENTRY_IAT,
617 pe->iat_offs + addr, pe->iat_size);
618 }
619 if (pe->exp_size) {
620 pe_set_datadir(IMAGE_DIRECTORY_ENTRY_EXPORT,
621 pe->exp_offs + addr, pe->exp_size);
622 }
623 }
624
625 strcpy((char*)psh->Name, sh_name);
626
627 psh->Characteristics = pe_sec_flags[si->cls];
628 psh->VirtualAddress = addr;
629 psh->Misc.VirtualSize = size;
630 pe_header.opthdr.SizeOfImage =
631 umax(pe_virtual_align(size + addr), pe_header.opthdr.SizeOfImage);
632
633 if (si->data_size) {
634 psh->PointerToRawData = r = file_offset;
635 fwrite(si->data, 1, si->data_size, op);
636 file_offset = pe_file_align(file_offset + si->data_size);
637 psh->SizeOfRawData = file_offset - r;
638 pe_fpad(op, file_offset);
639 }
640 }
641
642 // pe_header.filehdr.TimeDateStamp = time(NULL);
643 pe_header.filehdr.NumberOfSections = pe->sec_count;
644 pe_header.opthdr.SizeOfHeaders = pe->sizeofheaders;
645 pe_header.opthdr.ImageBase = pe->imagebase;
646 if (PE_DLL == pe->type)
647 pe_header.filehdr.Characteristics = 0x230E;
648 else if (PE_GUI != pe->type)
649 pe_header.opthdr.Subsystem = 3;
650
651 fseek(op, SEEK_SET, 0);
652 fwrite(&pe_header, 1, sizeof pe_header, op);
653 for (i = 0; i < pe->sec_count; ++i)
654 fwrite(&pe->sec_info[i].ish, 1, sizeof(IMAGE_SECTION_HEADER), op);
655 fclose (op);
656
657 if (2 == verbose)
658 printf("-------------------------------\n");
659 if (verbose)
660 printf("<- %s (%lu bytes)\n", pe->filename, file_offset);
661
662 return 0;
663 }
664
665 /*----------------------------------------------------------------------------*/
666
pe_add_import(struct pe_info * pe,int sym_index)667 ST_FN struct import_symbol *pe_add_import(struct pe_info *pe, int sym_index)
668 {
669 int i;
670 int dll_index;
671 struct pe_import_info *p;
672 struct import_symbol *s;
673
674 dll_index = ((Elf32_Sym *)pe->s1->dynsymtab_section->data + sym_index)->st_value;
675 if (0 == dll_index)
676 return NULL;
677
678 i = dynarray_assoc ((void**)pe->imp_info, pe->imp_count, dll_index);
679 if (-1 != i) {
680 p = pe->imp_info[i];
681 goto found_dll;
682 }
683 p = tcc_mallocz(sizeof *p);
684 p->dll_index = dll_index;
685 dynarray_add((void***)&pe->imp_info, &pe->imp_count, p);
686
687 found_dll:
688 i = dynarray_assoc ((void**)p->symbols, p->sym_count, sym_index);
689 if (-1 != i)
690 return p->symbols[i];
691
692 s = tcc_mallocz(sizeof *s);
693 dynarray_add((void***)&p->symbols, &p->sym_count, s);
694 s->sym_index = sym_index;
695 return s;
696 }
697
698 /*----------------------------------------------------------------------------*/
pe_build_imports(struct pe_info * pe)699 ST_FN void pe_build_imports(struct pe_info *pe)
700 {
701 int thk_ptr, ent_ptr, dll_ptr, sym_cnt, i;
702 DWORD rva_base = pe->thunk->sh_addr - pe->imagebase;
703 int ndlls = pe->imp_count;
704
705 for (sym_cnt = i = 0; i < ndlls; ++i)
706 sym_cnt += pe->imp_info[i]->sym_count;
707
708 if (0 == sym_cnt)
709 return;
710
711 pe_align_section(pe->thunk, 16);
712
713 pe->imp_offs = dll_ptr = pe->thunk->data_offset;
714 pe->imp_size = (ndlls + 1) * sizeof(struct pe_import_header);
715 pe->iat_offs = dll_ptr + pe->imp_size;
716 pe->iat_size = (sym_cnt + ndlls) * sizeof(DWORD);
717 section_ptr_add(pe->thunk, pe->imp_size + 2*pe->iat_size);
718
719 thk_ptr = pe->iat_offs;
720 ent_ptr = pe->iat_offs + pe->iat_size;
721
722 for (i = 0; i < pe->imp_count; ++i) {
723 struct pe_import_header *hdr;
724 int k, n, v;
725 struct pe_import_info *p = pe->imp_info[i];
726 const char *name = pe->s1->loaded_dlls[p->dll_index-1]->name;
727
728 /* put the dll name into the import header */
729 v = put_elf_str(pe->thunk, name);
730
731 hdr = (struct pe_import_header*)(pe->thunk->data + dll_ptr);
732 hdr->first_thunk = thk_ptr + rva_base;
733 hdr->first_entry = ent_ptr + rva_base;
734 hdr->lib_name_offset = v + rva_base;
735
736 for (k = 0, n = p->sym_count; k <= n; ++k) {
737 if (k < n) {
738 DWORD iat_index = p->symbols[k]->iat_index;
739 int sym_index = p->symbols[k]->sym_index;
740 Elf32_Sym *imp_sym = (Elf32_Sym *)pe->s1->dynsymtab_section->data + sym_index;
741 Elf32_Sym *org_sym = (Elf32_Sym *)symtab_section->data + iat_index;
742 const char *name = pe->s1->dynsymtab_section->link->data + imp_sym->st_name;
743
744 org_sym->st_value = thk_ptr;
745 org_sym->st_shndx = pe->thunk->sh_num;
746 v = pe->thunk->data_offset + rva_base;
747 section_ptr_add(pe->thunk, sizeof(WORD)); /* hint, not used */
748 put_elf_str(pe->thunk, name);
749
750 } else {
751 v = 0; /* last entry is zero */
752 }
753 *(DWORD*)(pe->thunk->data+thk_ptr) =
754 *(DWORD*)(pe->thunk->data+ent_ptr) = v;
755 thk_ptr += sizeof (DWORD);
756 ent_ptr += sizeof (DWORD);
757 }
758 dll_ptr += sizeof(struct pe_import_header);
759 dynarray_reset(&p->symbols, &p->sym_count);
760 }
761 dynarray_reset(&pe->imp_info, &pe->imp_count);
762 }
763
764 /* ------------------------------------------------------------- */
765 /*
766 For now only functions are exported. Export of data
767 would work, but import requires compiler support to
768 do an additional indirection.
769
770 For instance:
771 __declspec(dllimport) extern int something;
772
773 needs to be translated to:
774
775 *(int*)something
776 */
777
sym_cmp(const void * va,const void * vb)778 ST_FN int sym_cmp(const void *va, const void *vb)
779 {
780 const char *ca = ((const char **)va)[1];
781 const char *cb = ((const char **)vb)[1];
782 return strcmp(ca, cb);
783 }
784
pe_build_exports(struct pe_info * pe)785 ST_FN void pe_build_exports(struct pe_info *pe)
786 {
787 Elf32_Sym *sym;
788 int sym_index, sym_end;
789 DWORD rva_base, func_o, name_o, ord_o, str_o;
790 struct pe_export_header *hdr;
791 int sym_count, n, ord, *sorted, *sp;
792
793 FILE *op;
794 char buf[MAX_PATH];
795 const char *dllname;
796 const char *name;
797
798 rva_base = pe->thunk->sh_addr - pe->imagebase;
799 sym_count = 0, n = 1, sorted = NULL, op = NULL;
800
801 sym_end = symtab_section->data_offset / sizeof(Elf32_Sym);
802 for (sym_index = 1; sym_index < sym_end; ++sym_index) {
803 sym = (Elf32_Sym*)symtab_section->data + sym_index;
804 name = symtab_section->link->data + sym->st_name;
805 if ((sym->st_other & 1)
806 /* export only symbols from actually written sections */
807 && pe->s1->sections[sym->st_shndx]->sh_addr) {
808 dynarray_add((void***)&sorted, &sym_count, (void*)n);
809 dynarray_add((void***)&sorted, &sym_count, (void*)name);
810 }
811 ++n;
812 #if 0
813 if (sym->st_other & 1)
814 printf("export: %s\n", name);
815 if (sym->st_other & 2)
816 printf("stdcall: %s\n", name);
817 #endif
818 }
819
820 if (0 == sym_count)
821 return;
822 sym_count /= 2;
823
824 qsort (sorted, sym_count, 2 * sizeof sorted[0], sym_cmp);
825 pe_align_section(pe->thunk, 16);
826 dllname = tcc_basename(pe->filename);
827
828 pe->exp_offs = pe->thunk->data_offset;
829 func_o = pe->exp_offs + sizeof(struct pe_export_header);
830 name_o = func_o + sym_count * sizeof (DWORD);
831 ord_o = name_o + sym_count * sizeof (DWORD);
832 str_o = ord_o + sym_count * sizeof(WORD);
833
834 hdr = section_ptr_add(pe->thunk, str_o - pe->exp_offs);
835 hdr->Characteristics = 0;
836 hdr->Base = 1;
837 hdr->NumberOfFunctions = sym_count;
838 hdr->NumberOfNames = sym_count;
839 hdr->AddressOfFunctions = func_o + rva_base;
840 hdr->AddressOfNames = name_o + rva_base;
841 hdr->AddressOfNameOrdinals = ord_o + rva_base;
842 hdr->Name = str_o + rva_base;
843 put_elf_str(pe->thunk, dllname);
844
845 #if 1
846 /* automatically write exports to <output-filename>.def */
847 strcpy(buf, pe->filename);
848 strcpy(tcc_fileextension(buf), ".def");
849 op = fopen(buf, "w");
850 if (NULL == op) {
851 error_noabort("could not create '%s': %s", buf, strerror(errno));
852 } else {
853 fprintf(op, "LIBRARY %s\n\nEXPORTS\n", dllname);
854 if (verbose)
855 printf("<- %s (%d symbols)\n", buf, sym_count);
856 }
857 #endif
858
859 for (sp = sorted, ord = 0; ord < sym_count; ++ord, sp += 2)
860 {
861 sym_index = sp[0], name = (const char *)sp[1];
862 /* insert actual address later in pe_relocate_rva */
863 put_elf_reloc(symtab_section, pe->thunk,
864 func_o, R_386_RELATIVE, sym_index);
865 *(DWORD*)(pe->thunk->data + name_o)
866 = pe->thunk->data_offset + rva_base;
867 *(WORD*)(pe->thunk->data + ord_o)
868 = ord;
869 put_elf_str(pe->thunk, name);
870 func_o += sizeof (DWORD);
871 name_o += sizeof (DWORD);
872 ord_o += sizeof (WORD);
873
874 if (op)
875 fprintf(op, "%s\n", name);
876 }
877 pe->exp_size = pe->thunk->data_offset - pe->exp_offs;
878 tcc_free(sorted);
879 }
880
881 /* ------------------------------------------------------------- */
pe_build_reloc(struct pe_info * pe)882 ST_FN void pe_build_reloc (struct pe_info *pe)
883 {
884 DWORD offset, block_ptr, addr;
885 int count, i;
886 Elf32_Rel *rel, *rel_end;
887 Section *s = NULL, *sr;
888
889 offset = addr = block_ptr = count = i = 0;
890 rel = rel_end = NULL;
891
892 for(;;) {
893 if (rel < rel_end) {
894 int type = ELF32_R_TYPE(rel->r_info);
895 addr = rel->r_offset + s->sh_addr;
896 ++ rel;
897 if (type != R_386_32)
898 continue;
899 if (count == 0) { /* new block */
900 block_ptr = pe->reloc->data_offset;
901 section_ptr_add(pe->reloc, sizeof(struct pe_reloc_header));
902 offset = addr & 0xFFFFFFFF<<12;
903 }
904 if ((addr -= offset) < (1<<12)) { /* one block spans 4k addresses */
905 WORD *wp = section_ptr_add(pe->reloc, sizeof (WORD));
906 *wp = addr | IMAGE_REL_BASED_HIGHLOW<<12;
907 ++count;
908 continue;
909 }
910 -- rel;
911
912 } else if (i < pe->sec_count) {
913 sr = (s = pe->s1->sections[pe->sec_info[i++].ord])->reloc;
914 if (sr) {
915 rel = (Elf32_Rel *)sr->data;
916 rel_end = (Elf32_Rel *)(sr->data + sr->data_offset);
917 }
918 continue;
919 }
920
921 if (count) {
922 /* store the last block and ready for a new one */
923 struct pe_reloc_header *hdr;
924 if (count & 1) /* align for DWORDS */
925 section_ptr_add(pe->reloc, sizeof(WORD)), ++count;
926 hdr = (struct pe_reloc_header *)(pe->reloc->data + block_ptr);
927 hdr -> offset = offset - pe->imagebase;
928 hdr -> size = count * sizeof(WORD) + sizeof(struct pe_reloc_header);
929 count = 0;
930 }
931
932 if (rel >= rel_end)
933 break;
934 }
935 }
936
937 /* ------------------------------------------------------------- */
pe_section_class(Section * s)938 ST_FN int pe_section_class(Section *s)
939 {
940 int type, flags;
941 const char *name;
942
943 type = s->sh_type;
944 flags = s->sh_flags;
945 name = s->name;
946 if (flags & SHF_ALLOC) {
947 if (type == SHT_PROGBITS) {
948 if (flags & SHF_EXECINSTR)
949 return sec_text;
950 if (flags & SHF_WRITE)
951 return sec_data;
952 if (0 == strcmp(name, ".rsrc"))
953 return sec_rsrc;
954 if (0 == strcmp(name, ".iedat"))
955 return sec_idata;
956 } else if (type == SHT_NOBITS) {
957 if (flags & SHF_WRITE)
958 return sec_bss;
959 }
960 } else {
961 if (0 == strcmp(name, ".reloc"))
962 return sec_reloc;
963 if (0 == strncmp(name, ".stab", 5)) /* .stab and .stabstr */
964 return sec_stab;
965 }
966 return -1;
967 }
968
pe_assign_addresses(struct pe_info * pe)969 ST_FN int pe_assign_addresses (struct pe_info *pe)
970 {
971 int i, k, o, c;
972 DWORD addr;
973 int *section_order;
974 struct section_info *si;
975 Section *s;
976
977 // pe->thunk = new_section(pe->s1, ".iedat", SHT_PROGBITS, SHF_ALLOC);
978
979 section_order = tcc_malloc(pe->s1->nb_sections * sizeof (int));
980 for (o = k = 0 ; k < sec_last; ++k) {
981 for (i = 1; i < pe->s1->nb_sections; ++i) {
982 s = pe->s1->sections[i];
983 if (k == pe_section_class(s)) {
984 // printf("%s %d\n", s->name, k);
985 s->sh_addr = pe->imagebase;
986 section_order[o++] = i;
987 }
988 }
989 }
990
991 pe->sec_info = tcc_mallocz(o * sizeof (struct section_info));
992 addr = pe->imagebase + 1;
993
994 for (i = 0; i < o; ++i)
995 {
996 k = section_order[i];
997 s = pe->s1->sections[k];
998 c = pe_section_class(s);
999 si = &pe->sec_info[pe->sec_count];
1000
1001 #ifdef PE_MERGE_DATA
1002 if (c == sec_bss && pe->sec_count && si[-1].cls == sec_data) {
1003 /* append .bss to .data */
1004 s->sh_addr = addr = ((addr-1) | 15) + 1;
1005 addr += s->data_offset;
1006 si[-1].sh_size = addr - si[-1].sh_addr;
1007 continue;
1008 }
1009 #endif
1010 strcpy(si->name, s->name);
1011 si->cls = c;
1012 si->ord = k;
1013 si->sh_addr = s->sh_addr = addr = pe_virtual_align(addr);
1014 si->sh_flags = s->sh_flags;
1015
1016 if (c == sec_data && NULL == pe->thunk)
1017 pe->thunk = s;
1018
1019 if (s == pe->thunk) {
1020 pe_build_imports(pe);
1021 pe_build_exports(pe);
1022 }
1023
1024 if (c == sec_reloc)
1025 pe_build_reloc (pe);
1026
1027 if (s->data_offset)
1028 {
1029 if (s->sh_type != SHT_NOBITS) {
1030 si->data = s->data;
1031 si->data_size = s->data_offset;
1032 }
1033
1034 addr += s->data_offset;
1035 si->sh_size = s->data_offset;
1036 ++pe->sec_count;
1037 }
1038 // printf("%08x %05x %s\n", si->sh_addr, si->sh_size, si->name);
1039 }
1040
1041 #if 0
1042 for (i = 1; i < pe->s1->nb_sections; ++i) {
1043 Section *s = pe->s1->sections[i];
1044 int type = s->sh_type;
1045 int flags = s->sh_flags;
1046 printf("section %-16s %-10s %5x %s,%s,%s\n",
1047 s->name,
1048 type == SHT_PROGBITS ? "progbits" :
1049 type == SHT_NOBITS ? "nobits" :
1050 type == SHT_SYMTAB ? "symtab" :
1051 type == SHT_STRTAB ? "strtab" :
1052 type == SHT_REL ? "rel" : "???",
1053 s->data_offset,
1054 flags & SHF_ALLOC ? "alloc" : "",
1055 flags & SHF_WRITE ? "write" : "",
1056 flags & SHF_EXECINSTR ? "exec" : ""
1057 );
1058 }
1059 verbose = 2;
1060 #endif
1061
1062 tcc_free(section_order);
1063 return 0;
1064 }
1065
1066 /* ------------------------------------------------------------- */
pe_relocate_rva(struct pe_info * pe,Section * s)1067 ST_FN void pe_relocate_rva (struct pe_info *pe, Section *s)
1068 {
1069 Section *sr = s->reloc;
1070 Elf32_Rel *rel, *rel_end;
1071 rel_end = (Elf32_Rel *)(sr->data + sr->data_offset);
1072 for(rel = (Elf32_Rel *)sr->data; rel < rel_end; rel++)
1073 if (ELF32_R_TYPE(rel->r_info) == R_386_RELATIVE) {
1074 int sym_index = ELF32_R_SYM(rel->r_info);
1075 DWORD addr = s->sh_addr;
1076 if (sym_index) {
1077 Elf32_Sym *sym = (Elf32_Sym *)symtab_section->data + sym_index;
1078 addr = sym->st_value;
1079 }
1080 *(DWORD*)(s->data + rel->r_offset) += addr - pe->imagebase;
1081 }
1082 }
1083
1084 /*----------------------------------------------------------------------------*/
pe_check_symbols(struct pe_info * pe)1085 ST_FN int pe_check_symbols(struct pe_info *pe)
1086 {
1087 Elf32_Sym *sym;
1088 int sym_index, sym_end;
1089 int ret = 0;
1090
1091 pe_align_section(text_section, 8);
1092
1093 sym_end = symtab_section->data_offset / sizeof(Elf32_Sym);
1094 for (sym_index = 1; sym_index < sym_end; ++sym_index) {
1095
1096 sym = (Elf32_Sym*)symtab_section->data + sym_index;
1097 if (sym->st_shndx == SHN_UNDEF) {
1098
1099 const char *name = symtab_section->link->data + sym->st_name;
1100 unsigned type = ELF32_ST_TYPE(sym->st_info);
1101 int imp_sym = pe_find_import(pe->s1, name);
1102 struct import_symbol *is;
1103
1104 if (0 == imp_sym)
1105 goto not_found;
1106 is = pe_add_import(pe, imp_sym);
1107 if (!is)
1108 goto not_found;
1109
1110 if (type == STT_FUNC) {
1111 unsigned long offset = is->thk_offset;
1112 if (offset) {
1113 /* got aliased symbol, like stricmp and _stricmp */
1114
1115 } else {
1116 char buffer[100];
1117
1118 offset = text_section->data_offset;
1119 /* add the 'jmp IAT[x]' instruction */
1120 *(WORD*)section_ptr_add(text_section, 8) = 0x25FF;
1121
1122 /* add a helper symbol, will be patched later in
1123 pe_build_imports */
1124 sprintf(buffer, "IAT.%s", name);
1125 is->iat_index = put_elf_sym(
1126 symtab_section, 0, sizeof(DWORD),
1127 ELF32_ST_INFO(STB_GLOBAL, STT_OBJECT),
1128 0, SHN_UNDEF, buffer);
1129 put_elf_reloc(symtab_section, text_section,
1130 offset + 2, R_386_32, is->iat_index);
1131 is->thk_offset = offset;
1132 }
1133
1134 /* tcc_realloc might have altered sym's address */
1135 sym = (Elf32_Sym*)symtab_section->data + sym_index;
1136
1137 /* patch the original symbol */
1138 sym->st_value = offset;
1139 sym->st_shndx = text_section->sh_num;
1140 sym->st_other &= ~1; /* do not export */
1141 continue;
1142 }
1143
1144 if (type == STT_OBJECT) { /* data, ptr to that should be */
1145 if (0 == is->iat_index) {
1146 /* original symbol will be patched later in pe_build_imports */
1147 is->iat_index = sym_index;
1148 continue;
1149 }
1150 }
1151
1152 not_found:
1153 error_noabort("undefined symbol '%s'", name);
1154 ret = 1;
1155
1156 } else if (pe->s1->rdynamic
1157 && ELF32_ST_BIND(sym->st_info) != STB_LOCAL) {
1158 /* if -rdynamic option, then export all non local symbols */
1159 sym->st_other |= 1;
1160 }
1161 }
1162 return ret;
1163 }
1164
1165 /*----------------------------------------------------------------------------*/
1166 #ifdef PE_PRINT_SECTIONS
pe_print_section(FILE * f,Section * s)1167 ST_FN void pe_print_section(FILE * f, Section * s)
1168 {
1169 /* just if you'r curious */
1170 BYTE *p, *e, b;
1171 int i, n, l, m;
1172 p = s->data;
1173 e = s->data + s->data_offset;
1174 l = e - p;
1175
1176 fprintf(f, "section \"%s\"", s->name);
1177 if (s->link)
1178 fprintf(f, "\nlink \"%s\"", s->link->name);
1179 if (s->reloc)
1180 fprintf(f, "\nreloc \"%s\"", s->reloc->name);
1181 fprintf(f, "\nv_addr %08X", s->sh_addr);
1182 fprintf(f, "\ncontents %08X", l);
1183 fprintf(f, "\n\n");
1184
1185 if (s->sh_type == SHT_NOBITS)
1186 return;
1187
1188 if (0 == l)
1189 return;
1190
1191 if (s->sh_type == SHT_SYMTAB)
1192 m = sizeof(Elf32_Sym);
1193 if (s->sh_type == SHT_REL)
1194 m = sizeof(Elf32_Rel);
1195 else
1196 m = 16;
1197
1198 fprintf(f, "%-8s", "offset");
1199 for (i = 0; i < m; ++i)
1200 fprintf(f, " %02x", i);
1201 n = 56;
1202
1203 if (s->sh_type == SHT_SYMTAB || s->sh_type == SHT_REL) {
1204 const char *fields1[] = {
1205 "name",
1206 "value",
1207 "size",
1208 "bind",
1209 "type",
1210 "other",
1211 "shndx",
1212 NULL
1213 };
1214
1215 const char *fields2[] = {
1216 "offs",
1217 "type",
1218 "symb",
1219 NULL
1220 };
1221
1222 const char **p;
1223
1224 if (s->sh_type == SHT_SYMTAB)
1225 p = fields1, n = 106;
1226 else
1227 p = fields2, n = 58;
1228
1229 for (i = 0; p[i]; ++i)
1230 fprintf(f, "%6s", p[i]);
1231 fprintf(f, " symbol");
1232 }
1233
1234 fprintf(f, "\n");
1235 for (i = 0; i < n; ++i)
1236 fprintf(f, "-");
1237 fprintf(f, "\n");
1238
1239 for (i = 0; i < l;)
1240 {
1241 fprintf(f, "%08X", i);
1242 for (n = 0; n < m; ++n) {
1243 if (n + i < l)
1244 fprintf(f, " %02X", p[i + n]);
1245 else
1246 fprintf(f, " ");
1247 }
1248
1249 if (s->sh_type == SHT_SYMTAB) {
1250 Elf32_Sym *sym = (Elf32_Sym *) (p + i);
1251 const char *name = s->link->data + sym->st_name;
1252 fprintf(f, " %04X %04X %04X %02X %02X %02X %04X \"%s\"",
1253 sym->st_name,
1254 sym->st_value,
1255 sym->st_size,
1256 ELF32_ST_BIND(sym->st_info),
1257 ELF32_ST_TYPE(sym->st_info),
1258 sym->st_other, sym->st_shndx, name);
1259
1260 } else if (s->sh_type == SHT_REL) {
1261 Elf32_Rel *rel = (Elf32_Rel *) (p + i);
1262 Elf32_Sym *sym =
1263 (Elf32_Sym *) s->link->data + ELF32_R_SYM(rel->r_info);
1264 const char *name = s->link->link->data + sym->st_name;
1265 fprintf(f, " %04X %02X %04X \"%s\"",
1266 rel->r_offset,
1267 ELF32_R_TYPE(rel->r_info),
1268 ELF32_R_SYM(rel->r_info), name);
1269 } else {
1270 fprintf(f, " ");
1271 for (n = 0; n < m; ++n) {
1272 if (n + i < l) {
1273 b = p[i + n];
1274 if (b < 32 || b >= 127)
1275 b = '.';
1276 fprintf(f, "%c", b);
1277 }
1278 }
1279 }
1280 i += m;
1281 fprintf(f, "\n");
1282 }
1283 fprintf(f, "\n\n");
1284 }
1285
pe_print_sections(TCCState * s1,const char * fname)1286 ST_FN void pe_print_sections(TCCState *s1, const char *fname)
1287 {
1288 Section *s;
1289 FILE *f;
1290 int i;
1291 f = fopen(fname, "wt");
1292 for (i = 1; i < s1->nb_sections; ++i) {
1293 s = s1->sections[i];
1294 pe_print_section(f, s);
1295 }
1296 pe_print_section(f, s1->dynsymtab_section);
1297 fclose(f);
1298 }
1299 #endif
1300
1301 /* -------------------------------------------------------------
1302 * This is for compiled windows resources in 'coff' format
1303 * as generated by 'windres.exe -O coff ...'.
1304 */
1305
pe_test_res_file(void * v,int size)1306 PUB_FN int pe_test_res_file(void *v, int size)
1307 {
1308 struct pe_rsrc_header *p = (struct pe_rsrc_header *)v;
1309 return
1310 size >= IMAGE_SIZEOF_FILE_HEADER + IMAGE_SIZEOF_SHORT_NAME /* = 28 */
1311 && p->filehdr.Machine == 0x014C
1312 && 1 == p->filehdr.NumberOfSections
1313 && 0 == strcmp(p->sectionhdr.Name, ".rsrc")
1314 ;
1315 }
1316
read_n(int fd,void * ptr,unsigned size)1317 ST_FN int read_n(int fd, void *ptr, unsigned size)
1318 {
1319 return size == read(fd, ptr, size);
1320 }
1321
pe_load_res_file(TCCState * s1,int fd)1322 PUB_FN int pe_load_res_file(TCCState *s1, int fd)
1323 {
1324 struct pe_rsrc_header hdr;
1325 Section *rsrc_section;
1326 int i, ret = -1;
1327 BYTE *ptr;
1328
1329 lseek (fd, 0, SEEK_SET);
1330 if (!read_n(fd, &hdr, sizeof hdr))
1331 goto quit;
1332 if (!pe_test_res_file(&hdr, sizeof hdr))
1333 goto quit;
1334
1335 rsrc_section = new_section(s1, ".rsrc", SHT_PROGBITS, SHF_ALLOC);
1336 ptr = section_ptr_add(rsrc_section, hdr.sectionhdr.SizeOfRawData);
1337 lseek (fd, hdr.sectionhdr.PointerToRawData, SEEK_SET);
1338 if (!read_n(fd, ptr, hdr.sectionhdr.SizeOfRawData))
1339 goto quit;
1340
1341 lseek (fd, hdr.sectionhdr.PointerToRelocations, SEEK_SET);
1342 for (i = 0; i < hdr.sectionhdr.NumberOfRelocations; ++i)
1343 {
1344 struct pe_rsrc_reloc rel;
1345 if (!read_n(fd, &rel, sizeof rel))
1346 goto quit;
1347 // printf("rsrc_reloc: %x %x %x\n", rel.offset, rel.size, rel.type);
1348 if (rel.type != 7) /* DIR32NB */
1349 goto quit;
1350 put_elf_reloc(symtab_section, rsrc_section,
1351 rel.offset, R_386_RELATIVE, 0);
1352 }
1353 ret = 0;
1354 quit:
1355 if (ret)
1356 error_noabort("unrecognized resource file format");
1357 return ret;
1358 }
1359
1360 /* ------------------------------------------------------------- */
trimfront(char * p)1361 ST_FN char *trimfront(char *p)
1362 {
1363 while (*p && (unsigned char)*p <= ' ')
1364 ++p;
1365 return p;
1366 }
1367
trimback(char * a,char * e)1368 ST_FN char *trimback(char *a, char *e)
1369 {
1370 while (e > a && (unsigned char)e[-1] <= ' ')
1371 --e;
1372 *e = 0;;
1373 return a;
1374 }
1375
get_line(char * line,int size,FILE * fp)1376 ST_FN char *get_line(char *line, int size, FILE *fp)
1377 {
1378 if (NULL == fgets(line, size, fp))
1379 return NULL;
1380 trimback(line, strchr(line, 0));
1381 return trimfront(line);
1382 }
1383
1384 /* ------------------------------------------------------------- */
pe_load_def_file(TCCState * s1,int fd)1385 PUB_FN int pe_load_def_file(TCCState *s1, int fd)
1386 {
1387 DLLReference *dllref;
1388 int state = 0, ret = -1;
1389 char line[400], dllname[80], *p;
1390 FILE *fp = fdopen(dup(fd), "rb");
1391
1392 if (NULL == fp)
1393 goto quit;
1394
1395 for (;;) {
1396 p = get_line(line, sizeof line, fp);
1397 if (NULL == p)
1398 break;
1399 if (0 == *p || ';' == *p)
1400 continue;
1401 switch (state) {
1402 case 0:
1403 if (0 != strnicmp(p, "LIBRARY", 7))
1404 goto quit;
1405 strcpy(dllname, trimfront(p+7));
1406 ++state;
1407 continue;
1408
1409 case 1:
1410 if (0 != stricmp(p, "EXPORTS"))
1411 goto quit;
1412 ++state;
1413 continue;
1414
1415 case 2:
1416 dllref = tcc_malloc(sizeof(DLLReference) + strlen(dllname));
1417 strcpy(dllref->name, dllname);
1418 dllref->level = 0;
1419 dynarray_add((void ***) &s1->loaded_dlls, &s1->nb_loaded_dlls, dllref);
1420 ++state;
1421
1422 default:
1423 add_elf_sym(s1->dynsymtab_section,
1424 s1->nb_loaded_dlls, 0,
1425 ELF32_ST_INFO(STB_GLOBAL, STT_FUNC), 0,
1426 text_section->sh_num, p);
1427 continue;
1428 }
1429 }
1430 ret = 0;
1431 quit:
1432 if (fp)
1433 fclose(fp);
1434 if (ret)
1435 error_noabort("unrecognized export definition file format");
1436 return ret;
1437 }
1438
1439 /* ------------------------------------------------------------- */
1440
pe_add_runtime_ex(TCCState * s1,struct pe_info * pe)1441 ST_FN void pe_add_runtime_ex(TCCState *s1, struct pe_info *pe)
1442 {
1443 const char *start_symbol;
1444 unsigned long addr = 0;
1445 int pe_type = 0;
1446
1447 if (find_elf_sym(symtab_section, "_WinMain@16"))
1448 pe_type = PE_GUI;
1449 else
1450 if (TCC_OUTPUT_DLL == s1->output_type) {
1451 pe_type = PE_DLL;
1452 /* need this for 'tccelf.c:relocate_section()' */
1453 s1->output_type = TCC_OUTPUT_EXE;
1454 }
1455
1456 start_symbol =
1457 TCC_OUTPUT_MEMORY == s1->output_type
1458 ? PE_GUI == pe_type ? "_runwinmain" : NULL
1459 : PE_DLL == pe_type ? "__dllstart@12"
1460 : PE_GUI == pe_type ? "_winstart" : "_start"
1461 ;
1462
1463 /* grab the startup code from libtcc1 */
1464 if (start_symbol)
1465 add_elf_sym(symtab_section,
1466 0, 0,
1467 ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), 0,
1468 SHN_UNDEF, start_symbol);
1469
1470 if (0 == s1->nostdlib) {
1471 tcc_add_library(s1, "tcc1");
1472 #ifdef __CYGWIN__
1473 tcc_add_library(s1, "cygwin1");
1474 #else
1475 tcc_add_library(s1, "msvcrt");
1476 #endif
1477 tcc_add_library(s1, "kernel32");
1478 if (PE_DLL == pe_type || PE_GUI == pe_type) {
1479 tcc_add_library(s1, "user32");
1480 tcc_add_library(s1, "gdi32");
1481 }
1482 }
1483
1484 if (start_symbol) {
1485 addr = (unsigned long)tcc_get_symbol_err(s1, start_symbol);
1486 if (s1->output_type == TCC_OUTPUT_MEMORY && addr)
1487 /* for -run GUI's, put '_runwinmain' instead of 'main' */
1488 add_elf_sym(symtab_section,
1489 addr, 0,
1490 ELF32_ST_INFO(STB_GLOBAL, STT_NOTYPE), 0,
1491 text_section->sh_num, "main");
1492 }
1493
1494 if (pe) {
1495 pe->type = pe_type;
1496 pe->start_addr = addr;
1497 }
1498 }
1499
pe_add_runtime(TCCState * s1)1500 PUB_FN void pe_add_runtime(TCCState *s1)
1501 {
1502 pe_add_runtime_ex(s1, NULL);
1503 }
1504
pe_output_file(TCCState * s1,const char * filename)1505 PUB_FN int pe_output_file(TCCState * s1, const char *filename)
1506 {
1507 int ret;
1508 struct pe_info pe;
1509 int i;
1510
1511 memset(&pe, 0, sizeof pe);
1512 pe.filename = filename;
1513 pe.s1 = s1;
1514
1515 pe_add_runtime_ex(s1, &pe);
1516 relocate_common_syms(); /* assign bss adresses */
1517 tcc_add_linker_symbols(s1);
1518
1519 ret = pe_check_symbols(&pe);
1520 if (0 == ret) {
1521 if (PE_DLL == pe.type) {
1522 pe.reloc = new_section(pe.s1, ".reloc", SHT_PROGBITS, 0);
1523 pe.imagebase = 0x10000000;
1524 } else {
1525 pe.imagebase = 0x00400000;
1526 }
1527 pe_assign_addresses(&pe);
1528 relocate_syms(s1, 0);
1529 for (i = 1; i < s1->nb_sections; ++i) {
1530 Section *s = s1->sections[i];
1531 if (s->reloc) {
1532 relocate_section(s1, s);
1533 pe_relocate_rva(&pe, s);
1534 }
1535 }
1536 if (s1->nb_errors)
1537 ret = 1;
1538 else
1539 ret = pe_write(&pe);
1540 tcc_free(pe.sec_info);
1541 }
1542
1543 #ifdef PE_PRINT_SECTIONS
1544 pe_print_sections(s1, "tcc.log");
1545 #endif
1546 return ret;
1547 }
1548
1549 /* ------------------------------------------------------------- */
1550 #endif /* def TCC_TARGET_PE */
1551 /* ------------------------------------------------------------- */
1552