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Fix use-after-free in tccelf.c
[tinycc.git] / tccpe.c
blobdfe14454273a8bf62cac732edaee9f1f5183110e
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 #include "tcc.h"
22
23 #define PE_MERGE_DATA
24 /* #define PE_PRINT_SECTIONS */
25
26 #ifndef _WIN32
27 #define stricmp strcasecmp
28 #define strnicmp strncasecmp
29 #include <sys/stat.h> /* chmod() */
30 #endif
31
32 #ifdef TCC_TARGET_X86_64
33 # define ADDR3264 ULONGLONG
34 # define PE_IMAGE_REL IMAGE_REL_BASED_DIR64
35 # define REL_TYPE_DIRECT R_X86_64_64
36 # define R_XXX_THUNKFIX R_X86_64_PC32
37 # define R_XXX_RELATIVE R_X86_64_RELATIVE
38 # define IMAGE_FILE_MACHINE 0x8664
39 # define RSRC_RELTYPE 3
40
41 #elif defined TCC_TARGET_ARM
42 # define ADDR3264 DWORD
43 # define PE_IMAGE_REL IMAGE_REL_BASED_HIGHLOW
44 # define REL_TYPE_DIRECT R_ARM_ABS32
45 # define R_XXX_THUNKFIX R_ARM_ABS32
46 # define R_XXX_RELATIVE R_ARM_RELATIVE
47 # define IMAGE_FILE_MACHINE 0x01C0
48 # define RSRC_RELTYPE 7 /* ??? (not tested) */
49
50 #elif defined TCC_TARGET_I386
51 # define ADDR3264 DWORD
52 # define PE_IMAGE_REL IMAGE_REL_BASED_HIGHLOW
53 # define REL_TYPE_DIRECT R_386_32
54 # define R_XXX_THUNKFIX R_386_32
55 # define R_XXX_RELATIVE R_386_RELATIVE
56 # define IMAGE_FILE_MACHINE 0x014C
57 # define RSRC_RELTYPE 7 /* DIR32NB */
58
59 #endif
60
61 #ifndef IMAGE_NT_SIGNATURE
62 /* ----------------------------------------------------------- */
63 /* definitions below are from winnt.h */
64
65 typedef unsigned char BYTE;
66 typedef unsigned short WORD;
67 typedef unsigned int DWORD;
68 typedef unsigned long long ULONGLONG;
69 #pragma pack(push, 1)
70
71 typedef struct _IMAGE_DOS_HEADER { /* DOS .EXE header */
72 WORD e_magic; /* Magic number */
73 WORD e_cblp; /* Bytes on last page of file */
74 WORD e_cp; /* Pages in file */
75 WORD e_crlc; /* Relocations */
76 WORD e_cparhdr; /* Size of header in paragraphs */
77 WORD e_minalloc; /* Minimum extra paragraphs needed */
78 WORD e_maxalloc; /* Maximum extra paragraphs needed */
79 WORD e_ss; /* Initial (relative) SS value */
80 WORD e_sp; /* Initial SP value */
81 WORD e_csum; /* Checksum */
82 WORD e_ip; /* Initial IP value */
83 WORD e_cs; /* Initial (relative) CS value */
84 WORD e_lfarlc; /* File address of relocation table */
85 WORD e_ovno; /* Overlay number */
86 WORD e_res[4]; /* Reserved words */
87 WORD e_oemid; /* OEM identifier (for e_oeminfo) */
88 WORD e_oeminfo; /* OEM information; e_oemid specific */
89 WORD e_res2[10]; /* Reserved words */
90 DWORD e_lfanew; /* File address of new exe header */
91 } IMAGE_DOS_HEADER, *PIMAGE_DOS_HEADER;
92
93 #define IMAGE_NT_SIGNATURE 0x00004550 /* PE00 */
94 #define SIZE_OF_NT_SIGNATURE 4
95
96 typedef struct _IMAGE_FILE_HEADER {
97 WORD Machine;
98 WORD NumberOfSections;
99 DWORD TimeDateStamp;
100 DWORD PointerToSymbolTable;
101 DWORD NumberOfSymbols;
102 WORD SizeOfOptionalHeader;
103 WORD Characteristics;
104 } IMAGE_FILE_HEADER, *PIMAGE_FILE_HEADER;
105
106
107 #define IMAGE_SIZEOF_FILE_HEADER 20
108
109 typedef struct _IMAGE_DATA_DIRECTORY {
110 DWORD VirtualAddress;
111 DWORD Size;
112 } IMAGE_DATA_DIRECTORY, *PIMAGE_DATA_DIRECTORY;
113
114
115 typedef struct _IMAGE_OPTIONAL_HEADER {
116 /* Standard fields. */
117 WORD Magic;
118 BYTE MajorLinkerVersion;
119 BYTE MinorLinkerVersion;
120 DWORD SizeOfCode;
121 DWORD SizeOfInitializedData;
122 DWORD SizeOfUninitializedData;
123 DWORD AddressOfEntryPoint;
124 DWORD BaseOfCode;
125 #ifndef TCC_TARGET_X86_64
126 DWORD BaseOfData;
127 #endif
128 /* NT additional fields. */
129 ADDR3264 ImageBase;
130 DWORD SectionAlignment;
131 DWORD FileAlignment;
132 WORD MajorOperatingSystemVersion;
133 WORD MinorOperatingSystemVersion;
134 WORD MajorImageVersion;
135 WORD MinorImageVersion;
136 WORD MajorSubsystemVersion;
137 WORD MinorSubsystemVersion;
138 DWORD Win32VersionValue;
139 DWORD SizeOfImage;
140 DWORD SizeOfHeaders;
141 DWORD CheckSum;
142 WORD Subsystem;
143 WORD DllCharacteristics;
144 ADDR3264 SizeOfStackReserve;
145 ADDR3264 SizeOfStackCommit;
146 ADDR3264 SizeOfHeapReserve;
147 ADDR3264 SizeOfHeapCommit;
148 DWORD LoaderFlags;
149 DWORD NumberOfRvaAndSizes;
150 IMAGE_DATA_DIRECTORY DataDirectory[16];
151 } IMAGE_OPTIONAL_HEADER32, IMAGE_OPTIONAL_HEADER64, IMAGE_OPTIONAL_HEADER;
152
153 #define IMAGE_DIRECTORY_ENTRY_EXPORT 0 /* Export Directory */
154 #define IMAGE_DIRECTORY_ENTRY_IMPORT 1 /* Import Directory */
155 #define IMAGE_DIRECTORY_ENTRY_RESOURCE 2 /* Resource Directory */
156 #define IMAGE_DIRECTORY_ENTRY_EXCEPTION 3 /* Exception Directory */
157 #define IMAGE_DIRECTORY_ENTRY_SECURITY 4 /* Security Directory */
158 #define IMAGE_DIRECTORY_ENTRY_BASERELOC 5 /* Base Relocation Table */
159 #define IMAGE_DIRECTORY_ENTRY_DEBUG 6 /* Debug Directory */
160 /* IMAGE_DIRECTORY_ENTRY_COPYRIGHT 7 (X86 usage) */
161 #define IMAGE_DIRECTORY_ENTRY_ARCHITECTURE 7 /* Architecture Specific Data */
162 #define IMAGE_DIRECTORY_ENTRY_GLOBALPTR 8 /* RVA of GP */
163 #define IMAGE_DIRECTORY_ENTRY_TLS 9 /* TLS Directory */
164 #define IMAGE_DIRECTORY_ENTRY_LOAD_CONFIG 10 /* Load Configuration Directory */
165 #define IMAGE_DIRECTORY_ENTRY_BOUND_IMPORT 11 /* Bound Import Directory in headers */
166 #define IMAGE_DIRECTORY_ENTRY_IAT 12 /* Import Address Table */
167 #define IMAGE_DIRECTORY_ENTRY_DELAY_IMPORT 13 /* Delay Load Import Descriptors */
168 #define IMAGE_DIRECTORY_ENTRY_COM_DESCRIPTOR 14 /* COM Runtime descriptor */
169
170 /* Section header format. */
171 #define IMAGE_SIZEOF_SHORT_NAME 8
172
173 typedef struct _IMAGE_SECTION_HEADER {
174 BYTE Name[IMAGE_SIZEOF_SHORT_NAME];
175 union {
176 DWORD PhysicalAddress;
177 DWORD VirtualSize;
178 } Misc;
179 DWORD VirtualAddress;
180 DWORD SizeOfRawData;
181 DWORD PointerToRawData;
182 DWORD PointerToRelocations;
183 DWORD PointerToLinenumbers;
184 WORD NumberOfRelocations;
185 WORD NumberOfLinenumbers;
186 DWORD Characteristics;
187 } IMAGE_SECTION_HEADER, *PIMAGE_SECTION_HEADER;
188
189 #define IMAGE_SIZEOF_SECTION_HEADER 40
190
191 typedef struct _IMAGE_EXPORT_DIRECTORY {
192 DWORD Characteristics;
193 DWORD TimeDateStamp;
194 WORD MajorVersion;
195 WORD MinorVersion;
196 DWORD Name;
197 DWORD Base;
198 DWORD NumberOfFunctions;
199 DWORD NumberOfNames;
200 DWORD AddressOfFunctions;
201 DWORD AddressOfNames;
202 DWORD AddressOfNameOrdinals;
203 } IMAGE_EXPORT_DIRECTORY,*PIMAGE_EXPORT_DIRECTORY;
204
205 typedef struct _IMAGE_IMPORT_DESCRIPTOR {
206 union {
207 DWORD Characteristics;
208 DWORD OriginalFirstThunk;
209 };
210 DWORD TimeDateStamp;
211 DWORD ForwarderChain;
212 DWORD Name;
213 DWORD FirstThunk;
214 } IMAGE_IMPORT_DESCRIPTOR;
215
216 typedef struct _IMAGE_BASE_RELOCATION {
217 DWORD VirtualAddress;
218 DWORD SizeOfBlock;
219 // WORD TypeOffset[1];
220 } IMAGE_BASE_RELOCATION;
221
222 #define IMAGE_SIZEOF_BASE_RELOCATION 8
223
224 #define IMAGE_REL_BASED_ABSOLUTE 0
225 #define IMAGE_REL_BASED_HIGH 1
226 #define IMAGE_REL_BASED_LOW 2
227 #define IMAGE_REL_BASED_HIGHLOW 3
228 #define IMAGE_REL_BASED_HIGHADJ 4
229 #define IMAGE_REL_BASED_MIPS_JMPADDR 5
230 #define IMAGE_REL_BASED_SECTION 6
231 #define IMAGE_REL_BASED_REL32 7
232 #define IMAGE_REL_BASED_DIR64 10
233
234 #pragma pack(pop)
235
236 /* ----------------------------------------------------------- */
237 #endif /* ndef IMAGE_NT_SIGNATURE */
238 /* ----------------------------------------------------------- */
239
240 #ifndef IMAGE_REL_BASED_DIR64
241 # define IMAGE_REL_BASED_DIR64 10
242 #endif
243
244 #pragma pack(push, 1)
245 struct pe_header
246 {
247 IMAGE_DOS_HEADER doshdr;
248 BYTE dosstub[0x40];
249 DWORD nt_sig;
250 IMAGE_FILE_HEADER filehdr;
251 #ifdef TCC_TARGET_X86_64
252 IMAGE_OPTIONAL_HEADER64 opthdr;
253 #else
254 #ifdef _WIN64
255 IMAGE_OPTIONAL_HEADER32 opthdr;
256 #else
257 IMAGE_OPTIONAL_HEADER opthdr;
258 #endif
259 #endif
260 };
261
262 struct pe_reloc_header {
263 DWORD offset;
264 DWORD size;
265 };
266
267 struct pe_rsrc_header {
268 struct _IMAGE_FILE_HEADER filehdr;
269 struct _IMAGE_SECTION_HEADER sectionhdr;
270 };
271
272 struct pe_rsrc_reloc {
273 DWORD offset;
274 DWORD size;
275 WORD type;
276 };
277 #pragma pack(pop)
278
279 /* ------------------------------------------------------------- */
280 /* internal temporary structures */
281
282 /*
283 #define IMAGE_SCN_CNT_CODE 0x00000020
284 #define IMAGE_SCN_CNT_INITIALIZED_DATA 0x00000040
285 #define IMAGE_SCN_CNT_UNINITIALIZED_DATA 0x00000080
286 #define IMAGE_SCN_MEM_DISCARDABLE 0x02000000
287 #define IMAGE_SCN_MEM_SHARED 0x10000000
288 #define IMAGE_SCN_MEM_EXECUTE 0x20000000
289 #define IMAGE_SCN_MEM_READ 0x40000000
290 #define IMAGE_SCN_MEM_WRITE 0x80000000
291 */
292
293 enum {
294 sec_text = 0,
295 sec_data ,
296 sec_bss ,
297 sec_idata ,
298 sec_pdata ,
299 sec_other ,
300 sec_rsrc ,
301 sec_stab ,
302 sec_reloc ,
303 sec_last
304 };
305
306 static const DWORD pe_sec_flags[] = {
307 0x60000020, /* ".text" , */
308 0xC0000040, /* ".data" , */
309 0xC0000080, /* ".bss" , */
310 0x40000040, /* ".idata" , */
311 0x40000040, /* ".pdata" , */
312 0xE0000060, /* < other > , */
313 0x40000040, /* ".rsrc" , */
314 0x42000802, /* ".stab" , */
315 0x42000040, /* ".reloc" , */
316 };
317
318 struct section_info {
319 int cls, ord;
320 char name[32];
321 DWORD sh_addr;
322 DWORD sh_size;
323 DWORD sh_flags;
324 unsigned char *data;
325 DWORD data_size;
326 IMAGE_SECTION_HEADER ish;
327 };
328
329 struct import_symbol {
330 int sym_index;
331 int iat_index;
332 int thk_offset;
333 };
334
335 struct pe_import_info {
336 int dll_index;
337 int sym_count;
338 struct import_symbol **symbols;
339 };
340
341 struct pe_info {
342 TCCState *s1;
343 Section *reloc;
344 Section *thunk;
345 const char *filename;
346 int type;
347 DWORD sizeofheaders;
348 ADDR3264 imagebase;
349 const char *start_symbol;
350 DWORD start_addr;
351 DWORD imp_offs;
352 DWORD imp_size;
353 DWORD iat_offs;
354 DWORD iat_size;
355 DWORD exp_offs;
356 DWORD exp_size;
357 int subsystem;
358 DWORD section_align;
359 DWORD file_align;
360 struct section_info *sec_info;
361 int sec_count;
362 struct pe_import_info **imp_info;
363 int imp_count;
364 };
365
366 #define PE_NUL 0
367 #define PE_DLL 1
368 #define PE_GUI 2
369 #define PE_EXE 3
370 #define PE_RUN 4
371
372 /* --------------------------------------------*/
373
374 static const char *pe_export_name(TCCState *s1, ElfW(Sym) *sym)
375 {
376 const char *name = (char*)symtab_section->link->data + sym->st_name;
377 if (s1->leading_underscore && name[0] == '_' && !(sym->st_other & ST_PE_STDCALL))
378 return name + 1;
379 return name;
380 }
381
382 static int pe_find_import(TCCState * s1, ElfW(Sym) *sym)
383 {
384 char buffer[200];
385 const char *s, *p;
386 int sym_index = 0, n = 0;
387 int a, err = 0;
388
389 do {
390 s = pe_export_name(s1, sym);
391 a = 0;
392 if (n) {
393 /* second try: */
394 if (sym->st_other & ST_PE_STDCALL) {
395 /* try w/0 stdcall deco (windows API convention) */
396 p = strrchr(s, '@');
397 if (!p || s[0] != '_')
398 break;
399 strcpy(buffer, s+1)[p-s-1] = 0;
400 } else if (s[0] != '_') { /* try non-ansi function */
401 buffer[0] = '_', strcpy(buffer + 1, s);
402 } else if (0 == memcmp(s, "__imp_", 6)) { /* mingw 2.0 */
403 strcpy(buffer, s + 6), a = 1;
404 } else if (0 == memcmp(s, "_imp__", 6)) { /* mingw 3.7 */
405 strcpy(buffer, s + 6), a = 1;
406 } else {
407 continue;
408 }
409 s = buffer;
410 }
411 sym_index = find_elf_sym(s1->dynsymtab_section, s);
412 // printf("find (%d) %d %s\n", n, sym_index, s);
413 if (sym_index
414 && ELFW(ST_TYPE)(sym->st_info) == STT_OBJECT
415 && 0 == (sym->st_other & ST_PE_IMPORT)
416 && 0 == a
417 ) err = -1, sym_index = 0;
418 } while (0 == sym_index && ++n < 2);
419 return n == 2 ? err : sym_index;
420 }
421
422 /*----------------------------------------------------------------------------*/
423
424 static int dynarray_assoc(void **pp, int n, int key)
425 {
426 int i;
427 for (i = 0; i < n; ++i, ++pp)
428 if (key == **(int **) pp)
429 return i;
430 return -1;
431 }
432
433 #if 0
434 ST_FN DWORD umin(DWORD a, DWORD b)
435 {
436 return a < b ? a : b;
437 }
438 #endif
439
440 static DWORD umax(DWORD a, DWORD b)
441 {
442 return a < b ? b : a;
443 }
444
445 static DWORD pe_file_align(struct pe_info *pe, DWORD n)
446 {
447 return (n + (pe->file_align - 1)) & ~(pe->file_align - 1);
448 }
449
450 static DWORD pe_virtual_align(struct pe_info *pe, DWORD n)
451 {
452 return (n + (pe->section_align - 1)) & ~(pe->section_align - 1);
453 }
454
455 static void pe_align_section(Section *s, int a)
456 {
457 int i = s->data_offset & (a-1);
458 if (i)
459 section_ptr_add(s, a - i);
460 }
461
462 static void pe_set_datadir(struct pe_header *hdr, int dir, DWORD addr, DWORD size)
463 {
464 hdr->opthdr.DataDirectory[dir].VirtualAddress = addr;
465 hdr->opthdr.DataDirectory[dir].Size = size;
466 }
467
468 static int pe_fwrite(void *data, unsigned len, FILE *fp, DWORD *psum)
469 {
470 if (psum) {
471 DWORD sum = *psum;
472 WORD *p = data;
473 int i;
474 for (i = len; i > 0; i -= 2) {
475 sum += (i >= 2) ? *p++ : *(BYTE*)p;
476 sum = (sum + (sum >> 16)) & 0xFFFF;
477 }
478 *psum = sum;
479 }
480 return len == fwrite(data, 1, len, fp) ? 0 : -1;
481 }
482
483 static void pe_fpad(FILE *fp, DWORD new_pos)
484 {
485 DWORD pos = ftell(fp);
486 while (++pos <= new_pos)
487 fputc(0, fp);
488 }
489
490 /*----------------------------------------------------------------------------*/
491 static int pe_write(struct pe_info *pe)
492 {
493 static const struct pe_header pe_template = {
494 {
495 /* IMAGE_DOS_HEADER doshdr */
496 0x5A4D, /*WORD e_magic; Magic number */
497 0x0090, /*WORD e_cblp; Bytes on last page of file */
498 0x0003, /*WORD e_cp; Pages in file */
499 0x0000, /*WORD e_crlc; Relocations */
500
501 0x0004, /*WORD e_cparhdr; Size of header in paragraphs */
502 0x0000, /*WORD e_minalloc; Minimum extra paragraphs needed */
503 0xFFFF, /*WORD e_maxalloc; Maximum extra paragraphs needed */
504 0x0000, /*WORD e_ss; Initial (relative) SS value */
505
506 0x00B8, /*WORD e_sp; Initial SP value */
507 0x0000, /*WORD e_csum; Checksum */
508 0x0000, /*WORD e_ip; Initial IP value */
509 0x0000, /*WORD e_cs; Initial (relative) CS value */
510 0x0040, /*WORD e_lfarlc; File address of relocation table */
511 0x0000, /*WORD e_ovno; Overlay number */
512 {0,0,0,0}, /*WORD e_res[4]; Reserved words */
513 0x0000, /*WORD e_oemid; OEM identifier (for e_oeminfo) */
514 0x0000, /*WORD e_oeminfo; OEM information; e_oemid specific */
515 {0,0,0,0,0,0,0,0,0,0}, /*WORD e_res2[10]; Reserved words */
516 0x00000080 /*DWORD e_lfanew; File address of new exe header */
517 },{
518 /* BYTE dosstub[0x40] */
519 /* 14 code bytes + "This program cannot be run in DOS mode.\r\r\n$" + 6 * 0x00 */
520 0x0e,0x1f,0xba,0x0e,0x00,0xb4,0x09,0xcd,0x21,0xb8,0x01,0x4c,0xcd,0x21,0x54,0x68,
521 0x69,0x73,0x20,0x70,0x72,0x6f,0x67,0x72,0x61,0x6d,0x20,0x63,0x61,0x6e,0x6e,0x6f,
522 0x74,0x20,0x62,0x65,0x20,0x72,0x75,0x6e,0x20,0x69,0x6e,0x20,0x44,0x4f,0x53,0x20,
523 0x6d,0x6f,0x64,0x65,0x2e,0x0d,0x0d,0x0a,0x24,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
524 },
525 0x00004550, /* DWORD nt_sig = IMAGE_NT_SIGNATURE */
526 {
527 /* IMAGE_FILE_HEADER filehdr */
528 IMAGE_FILE_MACHINE, /*WORD Machine; */
529 0x0003, /*WORD NumberOfSections; */
530 0x00000000, /*DWORD TimeDateStamp; */
531 0x00000000, /*DWORD PointerToSymbolTable; */
532 0x00000000, /*DWORD NumberOfSymbols; */
533 #if defined(TCC_TARGET_X86_64)
534 0x00F0, /*WORD SizeOfOptionalHeader; */
535 0x022F /*WORD Characteristics; */
536 #define CHARACTERISTICS_DLL 0x222E
537 #elif defined(TCC_TARGET_I386)
538 0x00E0, /*WORD SizeOfOptionalHeader; */
539 0x030F /*WORD Characteristics; */
540 #define CHARACTERISTICS_DLL 0x230E
541 #elif defined(TCC_TARGET_ARM)
542 0x00E0, /*WORD SizeOfOptionalHeader; */
543 0x010F, /*WORD Characteristics; */
544 #define CHARACTERISTICS_DLL 0x230F
545 #endif
546 },{
547 /* IMAGE_OPTIONAL_HEADER opthdr */
548 /* Standard fields. */
549 #ifdef TCC_TARGET_X86_64
550 0x020B, /*WORD Magic; */
551 #else
552 0x010B, /*WORD Magic; */
553 #endif
554 0x06, /*BYTE MajorLinkerVersion; */
555 0x00, /*BYTE MinorLinkerVersion; */
556 0x00000000, /*DWORD SizeOfCode; */
557 0x00000000, /*DWORD SizeOfInitializedData; */
558 0x00000000, /*DWORD SizeOfUninitializedData; */
559 0x00000000, /*DWORD AddressOfEntryPoint; */
560 0x00000000, /*DWORD BaseOfCode; */
561 #ifndef TCC_TARGET_X86_64
562 0x00000000, /*DWORD BaseOfData; */
563 #endif
564 /* NT additional fields. */
565 #if defined(TCC_TARGET_ARM)
566 0x00100000, /*DWORD ImageBase; */
567 #else
568 0x00400000, /*DWORD ImageBase; */
569 #endif
570 0x00001000, /*DWORD SectionAlignment; */
571 0x00000200, /*DWORD FileAlignment; */
572 0x0004, /*WORD MajorOperatingSystemVersion; */
573 0x0000, /*WORD MinorOperatingSystemVersion; */
574 0x0000, /*WORD MajorImageVersion; */
575 0x0000, /*WORD MinorImageVersion; */
576 0x0004, /*WORD MajorSubsystemVersion; */
577 0x0000, /*WORD MinorSubsystemVersion; */
578 0x00000000, /*DWORD Win32VersionValue; */
579 0x00000000, /*DWORD SizeOfImage; */
580 0x00000200, /*DWORD SizeOfHeaders; */
581 0x00000000, /*DWORD CheckSum; */
582 0x0002, /*WORD Subsystem; */
583 0x0000, /*WORD DllCharacteristics; */
584 0x00100000, /*DWORD SizeOfStackReserve; */
585 0x00001000, /*DWORD SizeOfStackCommit; */
586 0x00100000, /*DWORD SizeOfHeapReserve; */
587 0x00001000, /*DWORD SizeOfHeapCommit; */
588 0x00000000, /*DWORD LoaderFlags; */
589 0x00000010, /*DWORD NumberOfRvaAndSizes; */
590
591 /* IMAGE_DATA_DIRECTORY DataDirectory[16]; */
592 {{0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0},
593 {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}, {0,0}}
594 }};
595
596 struct pe_header pe_header = pe_template;
597
598 int i;
599 FILE *op;
600 DWORD file_offset, sum;
601 struct section_info *si;
602 IMAGE_SECTION_HEADER *psh;
603
604 op = fopen(pe->filename, "wb");
605 if (NULL == op) {
606 tcc_error_noabort("could not write '%s': %s", pe->filename, strerror(errno));
607 return -1;
608 }
609
610 pe->sizeofheaders = pe_file_align(pe,
611 sizeof (struct pe_header)
612 + pe->sec_count * sizeof (IMAGE_SECTION_HEADER)
613 );
614
615 file_offset = pe->sizeofheaders;
616
617 if (2 == pe->s1->verbose)
618 printf("-------------------------------"
619 "\n virt file size section" "\n");
620 for (i = 0; i < pe->sec_count; ++i) {
621 DWORD addr, size;
622 const char *sh_name;
623
624 si = pe->sec_info + i;
625 sh_name = si->name;
626 addr = si->sh_addr - pe->imagebase;
627 size = si->sh_size;
628 psh = &si->ish;
629
630 if (2 == pe->s1->verbose)
631 printf("%6x %6x %6x %s\n",
632 (unsigned)addr, (unsigned)file_offset, (unsigned)size, sh_name);
633
634 switch (si->cls) {
635 case sec_text:
636 pe_header.opthdr.BaseOfCode = addr;
637 break;
638
639 case sec_data:
640 #ifndef TCC_TARGET_X86_64
641 pe_header.opthdr.BaseOfData = addr;
642 #endif
643 break;
644
645 case sec_bss:
646 break;
647
648 case sec_reloc:
649 pe_set_datadir(&pe_header, IMAGE_DIRECTORY_ENTRY_BASERELOC, addr, size);
650 break;
651
652 case sec_rsrc:
653 pe_set_datadir(&pe_header, IMAGE_DIRECTORY_ENTRY_RESOURCE, addr, size);
654 break;
655
656 case sec_pdata:
657 pe_set_datadir(&pe_header, IMAGE_DIRECTORY_ENTRY_EXCEPTION, addr, size);
658 break;
659
660 case sec_stab:
661 break;
662 }
663
664 if (pe->thunk == pe->s1->sections[si->ord]) {
665 if (pe->imp_size) {
666 pe_set_datadir(&pe_header, IMAGE_DIRECTORY_ENTRY_IMPORT,
667 pe->imp_offs + addr, pe->imp_size);
668 pe_set_datadir(&pe_header, IMAGE_DIRECTORY_ENTRY_IAT,
669 pe->iat_offs + addr, pe->iat_size);
670 }
671 if (pe->exp_size) {
672 pe_set_datadir(&pe_header, IMAGE_DIRECTORY_ENTRY_EXPORT,
673 pe->exp_offs + addr, pe->exp_size);
674 }
675 }
676
677 strncpy((char*)psh->Name, sh_name, sizeof psh->Name);
678
679 psh->Characteristics = pe_sec_flags[si->cls];
680 psh->VirtualAddress = addr;
681 psh->Misc.VirtualSize = size;
682 pe_header.opthdr.SizeOfImage =
683 umax(pe_virtual_align(pe, size + addr), pe_header.opthdr.SizeOfImage);
684
685 if (si->data_size) {
686 psh->PointerToRawData = file_offset;
687 file_offset = pe_file_align(pe, file_offset + si->data_size);
688 psh->SizeOfRawData = file_offset - psh->PointerToRawData;
689 if (si->cls == sec_text)
690 pe_header.opthdr.SizeOfCode += psh->SizeOfRawData;
691 else
692 pe_header.opthdr.SizeOfInitializedData += psh->SizeOfRawData;
693 }
694 }
695
696 //pe_header.filehdr.TimeDateStamp = time(NULL);
697 pe_header.filehdr.NumberOfSections = pe->sec_count;
698 pe_header.opthdr.AddressOfEntryPoint = pe->start_addr;
699 pe_header.opthdr.SizeOfHeaders = pe->sizeofheaders;
700 pe_header.opthdr.ImageBase = pe->imagebase;
701 pe_header.opthdr.Subsystem = pe->subsystem;
702 if (pe->s1->pe_stack_size)
703 pe_header.opthdr.SizeOfStackReserve = pe->s1->pe_stack_size;
704 if (PE_DLL == pe->type)
705 pe_header.filehdr.Characteristics = CHARACTERISTICS_DLL;
706 pe_header.filehdr.Characteristics |= pe->s1->pe_characteristics;
707
708 sum = 0;
709 pe_fwrite(&pe_header, sizeof pe_header, op, &sum);
710 for (i = 0; i < pe->sec_count; ++i)
711 pe_fwrite(&pe->sec_info[i].ish, sizeof(IMAGE_SECTION_HEADER), op, &sum);
712 pe_fpad(op, pe->sizeofheaders);
713 for (i = 0; i < pe->sec_count; ++i) {
714 si = pe->sec_info + i;
715 psh = &si->ish;
716 if (si->data_size) {
717 pe_fwrite(si->data, si->data_size, op, &sum);
718 file_offset = psh->PointerToRawData + psh->SizeOfRawData;
719 pe_fpad(op, file_offset);
720 }
721 }
722
723 pe_header.opthdr.CheckSum = sum + file_offset;
724 fseek(op, offsetof(struct pe_header, opthdr.CheckSum), SEEK_SET);
725 pe_fwrite(&pe_header.opthdr.CheckSum, sizeof pe_header.opthdr.CheckSum, op, NULL);
726 fclose (op);
727 #ifndef _WIN32
728 chmod(pe->filename, 0777);
729 #endif
730
731 if (2 == pe->s1->verbose)
732 printf("-------------------------------\n");
733 if (pe->s1->verbose)
734 printf("<- %s (%u bytes)\n", pe->filename, (unsigned)file_offset);
735
736 return 0;
737 }
738
739 /*----------------------------------------------------------------------------*/
740
741 static struct import_symbol *pe_add_import(struct pe_info *pe, int sym_index)
742 {
743 int i;
744 int dll_index;
745 struct pe_import_info *p;
746 struct import_symbol *s;
747 ElfW(Sym) *isym;
748
749 isym = (ElfW(Sym) *)pe->s1->dynsymtab_section->data + sym_index;
750 dll_index = isym->st_size;
751
752 i = dynarray_assoc ((void**)pe->imp_info, pe->imp_count, dll_index);
753 if (-1 != i) {
754 p = pe->imp_info[i];
755 goto found_dll;
756 }
757 p = tcc_mallocz(sizeof *p);
758 p->dll_index = dll_index;
759 dynarray_add(&pe->imp_info, &pe->imp_count, p);
760
761 found_dll:
762 i = dynarray_assoc ((void**)p->symbols, p->sym_count, sym_index);
763 if (-1 != i)
764 return p->symbols[i];
765
766 s = tcc_mallocz(sizeof *s);
767 dynarray_add(&p->symbols, &p->sym_count, s);
768 s->sym_index = sym_index;
769 return s;
770 }
771
772 void pe_free_imports(struct pe_info *pe)
773 {
774 int i;
775 for (i = 0; i < pe->imp_count; ++i) {
776 struct pe_import_info *p = pe->imp_info[i];
777 dynarray_reset(&p->symbols, &p->sym_count);
778 }
779 dynarray_reset(&pe->imp_info, &pe->imp_count);
780 }
781
782 /*----------------------------------------------------------------------------*/
783 static void pe_build_imports(struct pe_info *pe)
784 {
785 int thk_ptr, ent_ptr, dll_ptr, sym_cnt, i;
786 DWORD rva_base = pe->thunk->sh_addr - pe->imagebase;
787 int ndlls = pe->imp_count;
788
789 for (sym_cnt = i = 0; i < ndlls; ++i)
790 sym_cnt += pe->imp_info[i]->sym_count;
791
792 if (0 == sym_cnt)
793 return;
794
795 pe_align_section(pe->thunk, 16);
796
797 pe->imp_offs = dll_ptr = pe->thunk->data_offset;
798 pe->imp_size = (ndlls + 1) * sizeof(IMAGE_IMPORT_DESCRIPTOR);
799 pe->iat_offs = dll_ptr + pe->imp_size;
800 pe->iat_size = (sym_cnt + ndlls) * sizeof(ADDR3264);
801 section_ptr_add(pe->thunk, pe->imp_size + 2*pe->iat_size);
802
803 thk_ptr = pe->iat_offs;
804 ent_ptr = pe->iat_offs + pe->iat_size;
805
806 for (i = 0; i < pe->imp_count; ++i) {
807 IMAGE_IMPORT_DESCRIPTOR *hdr;
808 int k, n, dllindex;
809 ADDR3264 v;
810 struct pe_import_info *p = pe->imp_info[i];
811 const char *name;
812 DLLReference *dllref;
813
814 dllindex = p->dll_index;
815 if (dllindex)
816 name = (dllref = pe->s1->loaded_dlls[dllindex-1])->name;
817 else
818 name = "", dllref = NULL;
819
820 /* put the dll name into the import header */
821 v = put_elf_str(pe->thunk, name);
822 hdr = (IMAGE_IMPORT_DESCRIPTOR*)(pe->thunk->data + dll_ptr);
823 hdr->FirstThunk = thk_ptr + rva_base;
824 hdr->OriginalFirstThunk = ent_ptr + rva_base;
825 hdr->Name = v + rva_base;
826
827 for (k = 0, n = p->sym_count; k <= n; ++k) {
828 if (k < n) {
829 int iat_index = p->symbols[k]->iat_index;
830 int sym_index = p->symbols[k]->sym_index;
831 ElfW(Sym) *imp_sym = (ElfW(Sym) *)pe->s1->dynsymtab_section->data + sym_index;
832 ElfW(Sym) *org_sym = (ElfW(Sym) *)symtab_section->data + iat_index;
833 const char *name = (char*)pe->s1->dynsymtab_section->link->data + imp_sym->st_name;
834 int ordinal;
835
836 org_sym->st_value = thk_ptr;
837 org_sym->st_shndx = pe->thunk->sh_num;
838
839 if (dllref)
840 v = 0, ordinal = imp_sym->st_value; /* ordinal from pe_load_def */
841 else
842 ordinal = 0, v = imp_sym->st_value; /* address from tcc_add_symbol() */
843
844 #ifdef TCC_IS_NATIVE
845 if (pe->type == PE_RUN) {
846 if (dllref) {
847 if ( !dllref->handle )
848 dllref->handle = LoadLibrary(dllref->name);
849 v = (ADDR3264)GetProcAddress(dllref->handle, ordinal?(char*)0+ordinal:name);
850 }
851 if (!v)
852 tcc_error_noabort("can't build symbol '%s'", name);
853 } else
854 #endif
855 if (ordinal) {
856 v = ordinal | (ADDR3264)1 << (sizeof(ADDR3264)*8 - 1);
857 } else {
858 v = pe->thunk->data_offset + rva_base;
859 section_ptr_add(pe->thunk, sizeof(WORD)); /* hint, not used */
860 put_elf_str(pe->thunk, name);
861 }
862
863 } else {
864 v = 0; /* last entry is zero */
865 }
866
867 *(ADDR3264*)(pe->thunk->data+thk_ptr) =
868 *(ADDR3264*)(pe->thunk->data+ent_ptr) = v;
869 thk_ptr += sizeof (ADDR3264);
870 ent_ptr += sizeof (ADDR3264);
871 }
872 dll_ptr += sizeof(IMAGE_IMPORT_DESCRIPTOR);
873 }
874 }
875
876 /* ------------------------------------------------------------- */
877
878 struct pe_sort_sym
879 {
880 int index;
881 const char *name;
882 };
883
884 static int sym_cmp(const void *va, const void *vb)
885 {
886 const char *ca = (*(struct pe_sort_sym**)va)->name;
887 const char *cb = (*(struct pe_sort_sym**)vb)->name;
888 return strcmp(ca, cb);
889 }
890
891 static void pe_build_exports(struct pe_info *pe)
892 {
893 ElfW(Sym) *sym;
894 int sym_index, sym_end;
895 DWORD rva_base, func_o, name_o, ord_o, str_o;
896 IMAGE_EXPORT_DIRECTORY *hdr;
897 int sym_count, ord;
898 struct pe_sort_sym **sorted, *p;
899
900 FILE *op;
901 char buf[260];
902 const char *dllname;
903 const char *name;
904
905 rva_base = pe->thunk->sh_addr - pe->imagebase;
906 sym_count = 0, sorted = NULL, op = NULL;
907
908 sym_end = symtab_section->data_offset / sizeof(ElfW(Sym));
909 for (sym_index = 1; sym_index < sym_end; ++sym_index) {
910 sym = (ElfW(Sym)*)symtab_section->data + sym_index;
911 name = pe_export_name(pe->s1, sym);
912 if ((sym->st_other & ST_PE_EXPORT)
913 /* export only symbols from actually written sections */
914 && pe->s1->sections[sym->st_shndx]->sh_addr) {
915 p = tcc_malloc(sizeof *p);
916 p->index = sym_index;
917 p->name = name;
918 dynarray_add(&sorted, &sym_count, p);
919 }
920 #if 0
921 if (sym->st_other & ST_PE_EXPORT)
922 printf("export: %s\n", name);
923 if (sym->st_other & ST_PE_STDCALL)
924 printf("stdcall: %s\n", name);
925 #endif
926 }
927
928 if (0 == sym_count)
929 return;
930
931 qsort (sorted, sym_count, sizeof *sorted, sym_cmp);
932
933 pe_align_section(pe->thunk, 16);
934 dllname = tcc_basename(pe->filename);
935
936 pe->exp_offs = pe->thunk->data_offset;
937 func_o = pe->exp_offs + sizeof(IMAGE_EXPORT_DIRECTORY);
938 name_o = func_o + sym_count * sizeof (DWORD);
939 ord_o = name_o + sym_count * sizeof (DWORD);
940 str_o = ord_o + sym_count * sizeof(WORD);
941
942 hdr = section_ptr_add(pe->thunk, str_o - pe->exp_offs);
943 hdr->Characteristics = 0;
944 hdr->Base = 1;
945 hdr->NumberOfFunctions = sym_count;
946 hdr->NumberOfNames = sym_count;
947 hdr->AddressOfFunctions = func_o + rva_base;
948 hdr->AddressOfNames = name_o + rva_base;
949 hdr->AddressOfNameOrdinals = ord_o + rva_base;
950 hdr->Name = str_o + rva_base;
951 put_elf_str(pe->thunk, dllname);
952
953 #if 1
954 /* automatically write exports to <output-filename>.def */
955 pstrcpy(buf, sizeof buf, pe->filename);
956 strcpy(tcc_fileextension(buf), ".def");
957 op = fopen(buf, "wb");
958 if (NULL == op) {
959 tcc_error_noabort("could not create '%s': %s", buf, strerror(errno));
960 } else {
961 fprintf(op, "LIBRARY %s\n\nEXPORTS\n", dllname);
962 if (pe->s1->verbose)
963 printf("<- %s (%d symbol%s)\n", buf, sym_count, &"s"[sym_count < 2]);
964 }
965 #endif
966
967 for (ord = 0; ord < sym_count; ++ord)
968 {
969 p = sorted[ord], sym_index = p->index, name = p->name;
970 /* insert actual address later in relocate_section() */
971 put_elf_reloc(symtab_section, pe->thunk,
972 func_o, R_XXX_RELATIVE, sym_index);
973 *(DWORD*)(pe->thunk->data + name_o)
974 = pe->thunk->data_offset + rva_base;
975 *(WORD*)(pe->thunk->data + ord_o)
976 = ord;
977 put_elf_str(pe->thunk, name);
978 func_o += sizeof (DWORD);
979 name_o += sizeof (DWORD);
980 ord_o += sizeof (WORD);
981 if (op)
982 fprintf(op, "%s\n", name);
983 }
984 pe->exp_size = pe->thunk->data_offset - pe->exp_offs;
985 dynarray_reset(&sorted, &sym_count);
986 if (op)
987 fclose(op);
988 }
989
990 /* ------------------------------------------------------------- */
991 static void pe_build_reloc (struct pe_info *pe)
992 {
993 DWORD offset, block_ptr, addr;
994 int count, i;
995 ElfW_Rel *rel, *rel_end;
996 Section *s = NULL, *sr;
997
998 offset = addr = block_ptr = count = i = 0;
999 rel = rel_end = NULL;
1000
1001 for(;;) {
1002 if (rel < rel_end) {
1003 int type = ELFW(R_TYPE)(rel->r_info);
1004 addr = rel->r_offset + s->sh_addr;
1005 ++ rel;
1006 if (type != REL_TYPE_DIRECT)
1007 continue;
1008 if (count == 0) { /* new block */
1009 block_ptr = pe->reloc->data_offset;
1010 section_ptr_add(pe->reloc, sizeof(struct pe_reloc_header));
1011 offset = addr & 0xFFFFFFFF<<12;
1012 }
1013 if ((addr -= offset) < (1<<12)) { /* one block spans 4k addresses */
1014 WORD *wp = section_ptr_add(pe->reloc, sizeof (WORD));
1015 *wp = addr | PE_IMAGE_REL<<12;
1016 ++count;
1017 continue;
1018 }
1019 -- rel;
1020
1021 } else if (i < pe->sec_count) {
1022 sr = (s = pe->s1->sections[pe->sec_info[i++].ord])->reloc;
1023 if (sr) {
1024 rel = (ElfW_Rel *)sr->data;
1025 rel_end = (ElfW_Rel *)(sr->data + sr->data_offset);
1026 }
1027 continue;
1028 }
1029
1030 if (count) {
1031 /* store the last block and ready for a new one */
1032 struct pe_reloc_header *hdr;
1033 if (count & 1) /* align for DWORDS */
1034 section_ptr_add(pe->reloc, sizeof(WORD)), ++count;
1035 hdr = (struct pe_reloc_header *)(pe->reloc->data + block_ptr);
1036 hdr -> offset = offset - pe->imagebase;
1037 hdr -> size = count * sizeof(WORD) + sizeof(struct pe_reloc_header);
1038 count = 0;
1039 }
1040
1041 if (rel >= rel_end)
1042 break;
1043 }
1044 }
1045
1046 /* ------------------------------------------------------------- */
1047 static int pe_section_class(Section *s)
1048 {
1049 int type, flags;
1050 const char *name;
1051
1052 type = s->sh_type;
1053 flags = s->sh_flags;
1054 name = s->name;
1055 if (flags & SHF_ALLOC) {
1056 if (type == SHT_PROGBITS) {
1057 if (flags & SHF_EXECINSTR)
1058 return sec_text;
1059 if (flags & SHF_WRITE)
1060 return sec_data;
1061 if (0 == strcmp(name, ".rsrc"))
1062 return sec_rsrc;
1063 if (0 == strcmp(name, ".iedat"))
1064 return sec_idata;
1065 if (0 == strcmp(name, ".pdata"))
1066 return sec_pdata;
1067 return sec_other;
1068 } else if (type == SHT_NOBITS) {
1069 if (flags & SHF_WRITE)
1070 return sec_bss;
1071 }
1072 } else {
1073 if (0 == strcmp(name, ".reloc"))
1074 return sec_reloc;
1075 if (0 == strncmp(name, ".stab", 5)) /* .stab and .stabstr */
1076 return sec_stab;
1077 }
1078 return -1;
1079 }
1080
1081 static int pe_assign_addresses (struct pe_info *pe)
1082 {
1083 int i, k, o, c;
1084 DWORD addr;
1085 int *section_order;
1086 struct section_info *si;
1087 Section *s;
1088
1089 if (PE_DLL == pe->type)
1090 pe->reloc = new_section(pe->s1, ".reloc", SHT_PROGBITS, 0);
1091
1092 // pe->thunk = new_section(pe->s1, ".iedat", SHT_PROGBITS, SHF_ALLOC);
1093
1094 section_order = tcc_malloc(pe->s1->nb_sections * sizeof (int));
1095 for (o = k = 0 ; k < sec_last; ++k) {
1096 for (i = 1; i < pe->s1->nb_sections; ++i) {
1097 s = pe->s1->sections[i];
1098 if (k == pe_section_class(s)) {
1099 // printf("%s %d\n", s->name, k);
1100 s->sh_addr = pe->imagebase;
1101 section_order[o++] = i;
1102 }
1103 }
1104 }
1105
1106 pe->sec_info = tcc_mallocz(o * sizeof (struct section_info));
1107 addr = pe->imagebase + 1;
1108
1109 for (i = 0; i < o; ++i)
1110 {
1111 k = section_order[i];
1112 s = pe->s1->sections[k];
1113 c = pe_section_class(s);
1114 si = &pe->sec_info[pe->sec_count];
1115
1116 #ifdef PE_MERGE_DATA
1117 if (c == sec_bss && pe->sec_count && si[-1].cls == sec_data) {
1118 /* append .bss to .data */
1119 s->sh_addr = addr = ((addr-1) | (s->sh_addralign-1)) + 1;
1120 addr += s->data_offset;
1121 si[-1].sh_size = addr - si[-1].sh_addr;
1122 continue;
1123 }
1124 #endif
1125 if (c == sec_stab && 0 == pe->s1->do_debug)
1126 continue;
1127
1128 strcpy(si->name, s->name);
1129 si->cls = c;
1130 si->ord = k;
1131 si->sh_addr = s->sh_addr = addr = pe_virtual_align(pe, addr);
1132 si->sh_flags = s->sh_flags;
1133
1134 if (c == sec_data && NULL == pe->thunk)
1135 pe->thunk = s;
1136
1137 if (s == pe->thunk) {
1138 pe_build_imports(pe);
1139 pe_build_exports(pe);
1140 }
1141
1142 if (c == sec_reloc)
1143 pe_build_reloc (pe);
1144
1145 if (s->data_offset)
1146 {
1147 if (s->sh_type != SHT_NOBITS) {
1148 si->data = s->data;
1149 si->data_size = s->data_offset;
1150 }
1151
1152 addr += s->data_offset;
1153 si->sh_size = s->data_offset;
1154 ++pe->sec_count;
1155 }
1156 // printf("%08x %05x %s\n", si->sh_addr, si->sh_size, si->name);
1157 }
1158
1159 #if 0
1160 for (i = 1; i < pe->s1->nb_sections; ++i) {
1161 Section *s = pe->s1->sections[i];
1162 int type = s->sh_type;
1163 int flags = s->sh_flags;
1164 printf("section %-16s %-10s %5x %s,%s,%s\n",
1165 s->name,
1166 type == SHT_PROGBITS ? "progbits" :
1167 type == SHT_NOBITS ? "nobits" :
1168 type == SHT_SYMTAB ? "symtab" :
1169 type == SHT_STRTAB ? "strtab" :
1170 type == SHT_RELX ? "rel" : "???",
1171 s->data_offset,
1172 flags & SHF_ALLOC ? "alloc" : "",
1173 flags & SHF_WRITE ? "write" : "",
1174 flags & SHF_EXECINSTR ? "exec" : ""
1175 );
1176 }
1177 pe->s1->verbose = 2;
1178 #endif
1179
1180 tcc_free(section_order);
1181 return 0;
1182 }
1183
1184 /*----------------------------------------------------------------------------*/
1185
1186 static int pe_isafunc(int sym_index)
1187 {
1188 Section *sr = text_section->reloc;
1189 ElfW_Rel *rel, *rel_end;
1190 Elf32_Word info = ELF32_R_INFO(sym_index, R_386_PC32);
1191 if (!sr)
1192 return 0;
1193 rel_end = (ElfW_Rel *)(sr->data + sr->data_offset);
1194 for (rel = (ElfW_Rel *)sr->data; rel < rel_end; rel++)
1195 if (rel->r_info == info)
1196 return 1;
1197 return 0;
1198 }
1199
1200 /*----------------------------------------------------------------------------*/
1201 static int pe_check_symbols(struct pe_info *pe)
1202 {
1203 ElfW(Sym) *sym;
1204 int sym_index, sym_end;
1205 int ret = 0;
1206
1207 pe_align_section(text_section, 8);
1208
1209 sym_end = symtab_section->data_offset / sizeof(ElfW(Sym));
1210 for (sym_index = 1; sym_index < sym_end; ++sym_index) {
1211
1212 sym = (ElfW(Sym) *)symtab_section->data + sym_index;
1213 if (sym->st_shndx == SHN_UNDEF) {
1214
1215 const char *name = (char*)symtab_section->link->data + sym->st_name;
1216 unsigned type = ELFW(ST_TYPE)(sym->st_info);
1217 int imp_sym = pe_find_import(pe->s1, sym);
1218 struct import_symbol *is;
1219
1220 if (imp_sym <= 0)
1221 goto not_found;
1222
1223 if (type == STT_NOTYPE) {
1224 /* symbols from assembler have no type, find out which */
1225 if (pe_isafunc(sym_index))
1226 type = STT_FUNC;
1227 else
1228 type = STT_OBJECT;
1229 }
1230
1231 is = pe_add_import(pe, imp_sym);
1232
1233 if (type == STT_FUNC) {
1234 unsigned long offset = is->thk_offset;
1235 if (offset) {
1236 /* got aliased symbol, like stricmp and _stricmp */
1237
1238 } else {
1239 char buffer[100];
1240 WORD *p;
1241
1242 offset = text_section->data_offset;
1243 /* add the 'jmp IAT[x]' instruction */
1244 #ifdef TCC_TARGET_ARM
1245 p = section_ptr_add(text_section, 8+4); // room for code and address
1246 (*(DWORD*)(p)) = 0xE59FC000; // arm code ldr ip, [pc] ; PC+8+0 = 0001xxxx
1247 (*(DWORD*)(p+2)) = 0xE59CF000; // arm code ldr pc, [ip]
1248 #else
1249 p = section_ptr_add(text_section, 8);
1250 *p = 0x25FF;
1251 #ifdef TCC_TARGET_X86_64
1252 *(DWORD*)(p+1) = (DWORD)-4;
1253 #endif
1254 #endif
1255 /* add a helper symbol, will be patched later in
1256 pe_build_imports */
1257 sprintf(buffer, "IAT.%s", name);
1258 is->iat_index = put_elf_sym(
1259 symtab_section, 0, sizeof(DWORD),
1260 ELFW(ST_INFO)(STB_GLOBAL, STT_OBJECT),
1261 0, SHN_UNDEF, buffer);
1262 #ifdef TCC_TARGET_ARM
1263 put_elf_reloc(symtab_section, text_section,
1264 offset + 8, R_XXX_THUNKFIX, is->iat_index); // offset to IAT position
1265 #else
1266 put_elf_reloc(symtab_section, text_section,
1267 offset + 2, R_XXX_THUNKFIX, is->iat_index);
1268 #endif
1269 is->thk_offset = offset;
1270 }
1271
1272 /* tcc_realloc might have altered sym's address */
1273 sym = (ElfW(Sym) *)symtab_section->data + sym_index;
1274
1275 /* patch the original symbol */
1276 sym->st_value = offset;
1277 sym->st_shndx = text_section->sh_num;
1278 sym->st_other &= ~ST_PE_EXPORT; /* do not export */
1279 continue;
1280 }
1281
1282 if (type == STT_OBJECT) { /* data, ptr to that should be */
1283 if (0 == is->iat_index) {
1284 /* original symbol will be patched later in pe_build_imports */
1285 is->iat_index = sym_index;
1286 continue;
1287 }
1288 }
1289
1290 not_found:
1291 if (ELFW(ST_BIND)(sym->st_info) == STB_WEAK)
1292 /* STB_WEAK undefined symbols are accepted */
1293 continue;
1294 tcc_error_noabort("undefined symbol '%s'%s", name,
1295 imp_sym < 0 ? ", missing __declspec(dllimport)?":"");
1296 ret = -1;
1297
1298 } else if (pe->s1->rdynamic
1299 && ELFW(ST_BIND)(sym->st_info) != STB_LOCAL) {
1300 /* if -rdynamic option, then export all non local symbols */
1301 sym->st_other |= ST_PE_EXPORT;
1302 }
1303 }
1304 return ret;
1305 }
1306
1307 /*----------------------------------------------------------------------------*/
1308 #ifdef PE_PRINT_SECTIONS
1309 static void pe_print_section(FILE * f, Section * s)
1310 {
1311 /* just if you're curious */
1312 BYTE *p, *e, b;
1313 int i, n, l, m;
1314 p = s->data;
1315 e = s->data + s->data_offset;
1316 l = e - p;
1317
1318 fprintf(f, "section \"%s\"", s->name);
1319 if (s->link)
1320 fprintf(f, "\nlink \"%s\"", s->link->name);
1321 if (s->reloc)
1322 fprintf(f, "\nreloc \"%s\"", s->reloc->name);
1323 fprintf(f, "\nv_addr %08X", (unsigned)s->sh_addr);
1324 fprintf(f, "\ncontents %08X", (unsigned)l);
1325 fprintf(f, "\n\n");
1326
1327 if (s->sh_type == SHT_NOBITS)
1328 return;
1329
1330 if (0 == l)
1331 return;
1332
1333 if (s->sh_type == SHT_SYMTAB)
1334 m = sizeof(ElfW(Sym));
1335 else if (s->sh_type == SHT_RELX)
1336 m = sizeof(ElfW_Rel);
1337 else
1338 m = 16;
1339
1340 fprintf(f, "%-8s", "offset");
1341 for (i = 0; i < m; ++i)
1342 fprintf(f, " %02x", i);
1343 n = 56;
1344
1345 if (s->sh_type == SHT_SYMTAB || s->sh_type == SHT_RELX) {
1346 const char *fields1[] = {
1347 "name",
1348 "value",
1349 "size",
1350 "bind",
1351 "type",
1352 "other",
1353 "shndx",
1354 NULL
1355 };
1356
1357 const char *fields2[] = {
1358 "offs",
1359 "type",
1360 "symb",
1361 NULL
1362 };
1363
1364 const char **p;
1365
1366 if (s->sh_type == SHT_SYMTAB)
1367 p = fields1, n = 106;
1368 else
1369 p = fields2, n = 58;
1370
1371 for (i = 0; p[i]; ++i)
1372 fprintf(f, "%6s", p[i]);
1373 fprintf(f, " symbol");
1374 }
1375
1376 fprintf(f, "\n");
1377 for (i = 0; i < n; ++i)
1378 fprintf(f, "-");
1379 fprintf(f, "\n");
1380
1381 for (i = 0; i < l;)
1382 {
1383 fprintf(f, "%08X", i);
1384 for (n = 0; n < m; ++n) {
1385 if (n + i < l)
1386 fprintf(f, " %02X", p[i + n]);
1387 else
1388 fprintf(f, " ");
1389 }
1390
1391 if (s->sh_type == SHT_SYMTAB) {
1392 ElfW(Sym) *sym = (ElfW(Sym) *) (p + i);
1393 const char *name = s->link->data + sym->st_name;
1394 fprintf(f, " %04X %04X %04X %02X %02X %02X %04X \"%s\"",
1395 (unsigned)sym->st_name,
1396 (unsigned)sym->st_value,
1397 (unsigned)sym->st_size,
1398 (unsigned)ELFW(ST_BIND)(sym->st_info),
1399 (unsigned)ELFW(ST_TYPE)(sym->st_info),
1400 (unsigned)sym->st_other,
1401 (unsigned)sym->st_shndx,
1402 name);
1403
1404 } else if (s->sh_type == SHT_RELX) {
1405 ElfW_Rel *rel = (ElfW_Rel *) (p + i);
1406 ElfW(Sym) *sym =
1407 (ElfW(Sym) *) s->link->data + ELFW(R_SYM)(rel->r_info);
1408 const char *name = s->link->link->data + sym->st_name;
1409 fprintf(f, " %04X %02X %04X \"%s\"",
1410 (unsigned)rel->r_offset,
1411 (unsigned)ELFW(R_TYPE)(rel->r_info),
1412 (unsigned)ELFW(R_SYM)(rel->r_info),
1413 name);
1414 } else {
1415 fprintf(f, " ");
1416 for (n = 0; n < m; ++n) {
1417 if (n + i < l) {
1418 b = p[i + n];
1419 if (b < 32 || b >= 127)
1420 b = '.';
1421 fprintf(f, "%c", b);
1422 }
1423 }
1424 }
1425 i += m;
1426 fprintf(f, "\n");
1427 }
1428 fprintf(f, "\n\n");
1429 }
1430
1431 static void pe_print_sections(TCCState *s1, const char *fname)
1432 {
1433 Section *s;
1434 FILE *f;
1435 int i;
1436 f = fopen(fname, "w");
1437 for (i = 1; i < s1->nb_sections; ++i) {
1438 s = s1->sections[i];
1439 pe_print_section(f, s);
1440 }
1441 pe_print_section(f, s1->dynsymtab_section);
1442 fclose(f);
1443 }
1444 #endif
1445
1446 /* ------------------------------------------------------------- */
1447 /* helper function for load/store to insert one more indirection */
1448
1449 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
1450 ST_FUNC SValue *pe_getimport(SValue *sv, SValue *v2)
1451 {
1452 int r2;
1453 if ((sv->r & (VT_VALMASK|VT_SYM)) != (VT_CONST|VT_SYM) || (sv->r2 != VT_CONST))
1454 return sv;
1455 if (!sv->sym->a.dllimport)
1456 return sv;
1457 // printf("import %04x %04x %04x %s\n", sv->type.t, sv->sym->type.t, sv->r, get_tok_str(sv->sym->v, NULL));
1458 memset(v2, 0, sizeof *v2);
1459 v2->type.t = VT_PTR;
1460 v2->r = VT_CONST | VT_SYM | VT_LVAL;
1461 v2->sym = sv->sym;
1462
1463 r2 = get_reg(RC_INT);
1464 load(r2, v2);
1465 v2->r = r2;
1466 if ((uint32_t)sv->c.i) {
1467 vpushv(v2);
1468 vpushi(sv->c.i);
1469 gen_opi('+');
1470 *v2 = *vtop--;
1471 }
1472 v2->type.t = sv->type.t;
1473 v2->r |= sv->r & VT_LVAL;
1474 return v2;
1475 }
1476 #endif
1477
1478 ST_FUNC int pe_putimport(TCCState *s1, int dllindex, const char *name, addr_t value)
1479 {
1480 return set_elf_sym(
1481 s1->dynsymtab_section,
1482 value,
1483 dllindex, /* st_size */
1484 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE),
1485 0,
1486 value ? SHN_ABS : SHN_UNDEF,
1487 name
1488 );
1489 }
1490
1491 static int add_dllref(TCCState *s1, const char *dllname)
1492 {
1493 DLLReference *dllref;
1494 int i;
1495 for (i = 0; i < s1->nb_loaded_dlls; ++i)
1496 if (0 == strcmp(s1->loaded_dlls[i]->name, dllname))
1497 return i + 1;
1498 dllref = tcc_mallocz(sizeof(DLLReference) + strlen(dllname));
1499 strcpy(dllref->name, dllname);
1500 dynarray_add(&s1->loaded_dlls, &s1->nb_loaded_dlls, dllref);
1501 return s1->nb_loaded_dlls;
1502 }
1503
1504 /* ------------------------------------------------------------- */
1505
1506 static int read_mem(int fd, unsigned offset, void *buffer, unsigned len)
1507 {
1508 lseek(fd, offset, SEEK_SET);
1509 return len == read(fd, buffer, len);
1510 }
1511
1512 /* ------------------------------------------------------------- */
1513
1514 PUB_FUNC int tcc_get_dllexports(const char *filename, char **pp)
1515 {
1516 int l, i, n, n0, ret;
1517 char *p;
1518 int fd;
1519
1520 IMAGE_SECTION_HEADER ish;
1521 IMAGE_EXPORT_DIRECTORY ied;
1522 IMAGE_DOS_HEADER dh;
1523 IMAGE_FILE_HEADER ih;
1524 DWORD sig, ref, addr, ptr, namep;
1525
1526 int pef_hdroffset, opt_hdroffset, sec_hdroffset;
1527
1528 n = n0 = 0;
1529 p = NULL;
1530 ret = -1;
1531
1532 fd = open(filename, O_RDONLY | O_BINARY);
1533 if (fd < 0)
1534 goto the_end_1;
1535 ret = 1;
1536 if (!read_mem(fd, 0, &dh, sizeof dh))
1537 goto the_end;
1538 if (!read_mem(fd, dh.e_lfanew, &sig, sizeof sig))
1539 goto the_end;
1540 if (sig != 0x00004550)
1541 goto the_end;
1542 pef_hdroffset = dh.e_lfanew + sizeof sig;
1543 if (!read_mem(fd, pef_hdroffset, &ih, sizeof ih))
1544 goto the_end;
1545 opt_hdroffset = pef_hdroffset + sizeof ih;
1546 if (ih.Machine == 0x014C) {
1547 IMAGE_OPTIONAL_HEADER32 oh;
1548 sec_hdroffset = opt_hdroffset + sizeof oh;
1549 if (!read_mem(fd, opt_hdroffset, &oh, sizeof oh))
1550 goto the_end;
1551 if (IMAGE_DIRECTORY_ENTRY_EXPORT >= oh.NumberOfRvaAndSizes)
1552 goto the_end_0;
1553 addr = oh.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
1554 } else if (ih.Machine == 0x8664) {
1555 IMAGE_OPTIONAL_HEADER64 oh;
1556 sec_hdroffset = opt_hdroffset + sizeof oh;
1557 if (!read_mem(fd, opt_hdroffset, &oh, sizeof oh))
1558 goto the_end;
1559 if (IMAGE_DIRECTORY_ENTRY_EXPORT >= oh.NumberOfRvaAndSizes)
1560 goto the_end_0;
1561 addr = oh.DataDirectory[IMAGE_DIRECTORY_ENTRY_EXPORT].VirtualAddress;
1562 } else
1563 goto the_end;
1564
1565 //printf("addr: %08x\n", addr);
1566 for (i = 0; i < ih.NumberOfSections; ++i) {
1567 if (!read_mem(fd, sec_hdroffset + i * sizeof ish, &ish, sizeof ish))
1568 goto the_end;
1569 //printf("vaddr: %08x\n", ish.VirtualAddress);
1570 if (addr >= ish.VirtualAddress && addr < ish.VirtualAddress + ish.SizeOfRawData)
1571 goto found;
1572 }
1573 goto the_end_0;
1574
1575 found:
1576 ref = ish.VirtualAddress - ish.PointerToRawData;
1577 if (!read_mem(fd, addr - ref, &ied, sizeof ied))
1578 goto the_end;
1579
1580 namep = ied.AddressOfNames - ref;
1581 for (i = 0; i < ied.NumberOfNames; ++i) {
1582 if (!read_mem(fd, namep, &ptr, sizeof ptr))
1583 goto the_end;
1584 namep += sizeof ptr;
1585 for (l = 0;;) {
1586 if (n+1 >= n0)
1587 p = tcc_realloc(p, n0 = n0 ? n0 * 2 : 256);
1588 if (!read_mem(fd, ptr - ref + l++, p + n, 1)) {
1589 tcc_free(p), p = NULL;
1590 goto the_end;
1591 }
1592 if (p[n++] == 0)
1593 break;
1594 }
1595 }
1596 if (p)
1597 p[n] = 0;
1598 the_end_0:
1599 ret = 0;
1600 the_end:
1601 close(fd);
1602 the_end_1:
1603 *pp = p;
1604 return ret;
1605 }
1606
1607 /* -------------------------------------------------------------
1608 * This is for compiled windows resources in 'coff' format
1609 * as generated by 'windres.exe -O coff ...'.
1610 */
1611
1612 static int pe_load_res(TCCState *s1, int fd)
1613 {
1614 struct pe_rsrc_header hdr;
1615 Section *rsrc_section;
1616 int i, ret = -1, sym_index;
1617 BYTE *ptr;
1618 unsigned offs;
1619
1620 if (!read_mem(fd, 0, &hdr, sizeof hdr))
1621 goto quit;
1622
1623 if (hdr.filehdr.Machine != IMAGE_FILE_MACHINE
1624 || hdr.filehdr.NumberOfSections != 1
1625 || strcmp((char*)hdr.sectionhdr.Name, ".rsrc") != 0)
1626 goto quit;
1627
1628 rsrc_section = new_section(s1, ".rsrc", SHT_PROGBITS, SHF_ALLOC);
1629 ptr = section_ptr_add(rsrc_section, hdr.sectionhdr.SizeOfRawData);
1630 offs = hdr.sectionhdr.PointerToRawData;
1631 if (!read_mem(fd, offs, ptr, hdr.sectionhdr.SizeOfRawData))
1632 goto quit;
1633 offs = hdr.sectionhdr.PointerToRelocations;
1634 sym_index = put_elf_sym(symtab_section, 0, 0, 0, 0, rsrc_section->sh_num, ".rsrc");
1635 for (i = 0; i < hdr.sectionhdr.NumberOfRelocations; ++i) {
1636 struct pe_rsrc_reloc rel;
1637 if (!read_mem(fd, offs, &rel, sizeof rel))
1638 goto quit;
1639 // printf("rsrc_reloc: %x %x %x\n", rel.offset, rel.size, rel.type);
1640 if (rel.type != RSRC_RELTYPE)
1641 goto quit;
1642 put_elf_reloc(symtab_section, rsrc_section,
1643 rel.offset, R_XXX_RELATIVE, sym_index);
1644 offs += sizeof rel;
1645 }
1646 ret = 0;
1647 quit:
1648 return ret;
1649 }
1650
1651 /* ------------------------------------------------------------- */
1652
1653 static char *trimfront(char *p)
1654 {
1655 while (*p && (unsigned char)*p <= ' ')
1656 ++p;
1657 return p;
1658 }
1659
1660 static char *trimback(char *a, char *e)
1661 {
1662 while (e > a && (unsigned char)e[-1] <= ' ')
1663 --e;
1664 *e = 0;;
1665 return a;
1666 }
1667
1668 /* ------------------------------------------------------------- */
1669 static int pe_load_def(TCCState *s1, int fd)
1670 {
1671 int state = 0, ret = -1, dllindex = 0, ord;
1672 char line[400], dllname[80], *p, *x;
1673 FILE *fp;
1674
1675 fp = fdopen(dup(fd), "rb");
1676 while (fgets(line, sizeof line, fp))
1677 {
1678 p = trimfront(trimback(line, strchr(line, 0)));
1679 if (0 == *p || ';' == *p)
1680 continue;
1681
1682 switch (state) {
1683 case 0:
1684 if (0 != strnicmp(p, "LIBRARY", 7))
1685 goto quit;
1686 pstrcpy(dllname, sizeof dllname, trimfront(p+7));
1687 ++state;
1688 continue;
1689
1690 case 1:
1691 if (0 != stricmp(p, "EXPORTS"))
1692 goto quit;
1693 ++state;
1694 continue;
1695
1696 case 2:
1697 dllindex = add_dllref(s1, dllname);
1698 ++state;
1699 /* fall through */
1700 default:
1701 /* get ordinal and will store in sym->st_value */
1702 ord = 0;
1703 x = strchr(p, ' ');
1704 if (x) {
1705 *x = 0, x = strrchr(x + 1, '@');
1706 if (x) {
1707 char *d;
1708 ord = (int)strtol(x + 1, &d, 10);
1709 if (*d)
1710 ord = 0;
1711 }
1712 }
1713 pe_putimport(s1, dllindex, p, ord);
1714 continue;
1715 }
1716 }
1717 ret = 0;
1718 quit:
1719 fclose(fp);
1720 return ret;
1721 }
1722
1723 /* ------------------------------------------------------------- */
1724 static int pe_load_dll(TCCState *s1, const char *filename)
1725 {
1726 char *p, *q;
1727 int index, ret;
1728
1729 ret = tcc_get_dllexports(filename, &p);
1730 if (ret) {
1731 return -1;
1732 } else if (p) {
1733 index = add_dllref(s1, tcc_basename(filename));
1734 for (q = p; *q; q += 1 + strlen(q))
1735 pe_putimport(s1, index, q, 0);
1736 tcc_free(p);
1737 }
1738 return 0;
1739 }
1740
1741 /* ------------------------------------------------------------- */
1742 ST_FUNC int pe_load_file(struct TCCState *s1, const char *filename, int fd)
1743 {
1744 int ret = -1;
1745 char buf[10];
1746 if (0 == strcmp(tcc_fileextension(filename), ".def"))
1747 ret = pe_load_def(s1, fd);
1748 else if (pe_load_res(s1, fd) == 0)
1749 ret = 0;
1750 else if (read_mem(fd, 0, buf, 4) && 0 == memcmp(buf, "MZ", 2))
1751 ret = pe_load_dll(s1, filename);
1752 return ret;
1753 }
1754
1755 /* ------------------------------------------------------------- */
1756 #ifdef TCC_TARGET_X86_64
1757 static unsigned pe_add_uwwind_info(TCCState *s1)
1758 {
1759 if (NULL == s1->uw_pdata) {
1760 s1->uw_pdata = find_section(tcc_state, ".pdata");
1761 s1->uw_pdata->sh_addralign = 4;
1762 }
1763 if (0 == s1->uw_sym)
1764 s1->uw_sym = put_elf_sym(symtab_section, 0, 0, 0, 0, text_section->sh_num, ".uw_base");
1765 if (0 == s1->uw_offs) {
1766 /* As our functions all have the same stackframe, we use one entry for all */
1767 static const unsigned char uw_info[] = {
1768 0x01, // UBYTE: 3 Version , UBYTE: 5 Flags
1769 0x04, // UBYTE Size of prolog
1770 0x02, // UBYTE Count of unwind codes
1771 0x05, // UBYTE: 4 Frame Register (rbp), UBYTE: 4 Frame Register offset (scaled)
1772 // USHORT * n Unwind codes array
1773 // 0x0b, 0x01, 0xff, 0xff, // stack size
1774 0x04, 0x03, // set frame ptr (mov rsp -> rbp)
1775 0x01, 0x50 // push reg (rbp)
1776 };
1777
1778 Section *s = text_section;
1779 unsigned char *p;
1780
1781 section_ptr_add(s, -s->data_offset & 3); /* align */
1782 s1->uw_offs = s->data_offset;
1783 p = section_ptr_add(s, sizeof uw_info);
1784 memcpy(p, uw_info, sizeof uw_info);
1785 }
1786
1787 return s1->uw_offs;
1788 }
1789
1790 ST_FUNC void pe_add_unwind_data(unsigned start, unsigned end, unsigned stack)
1791 {
1792 TCCState *s1 = tcc_state;
1793 Section *pd;
1794 unsigned o, n, d;
1795 struct /* _RUNTIME_FUNCTION */ {
1796 DWORD BeginAddress;
1797 DWORD EndAddress;
1798 DWORD UnwindData;
1799 } *p;
1800
1801 d = pe_add_uwwind_info(s1);
1802 pd = s1->uw_pdata;
1803 o = pd->data_offset;
1804 p = section_ptr_add(pd, sizeof *p);
1805
1806 /* record this function */
1807 p->BeginAddress = start;
1808 p->EndAddress = end;
1809 p->UnwindData = d;
1810
1811 /* put relocations on it */
1812 for (n = o + sizeof *p; o < n; o += sizeof p->BeginAddress)
1813 put_elf_reloc(symtab_section, pd, o, R_XXX_RELATIVE, s1->uw_sym);
1814 }
1815 #endif
1816 /* ------------------------------------------------------------- */
1817 #ifdef TCC_TARGET_X86_64
1818 #define PE_STDSYM(n,s) n
1819 #else
1820 #define PE_STDSYM(n,s) "_" n s
1821 #endif
1822
1823 static void pe_add_runtime(TCCState *s1, struct pe_info *pe)
1824 {
1825 const char *start_symbol;
1826 int pe_type = 0;
1827 int unicode_entry = 0;
1828
1829 if (find_elf_sym(symtab_section, PE_STDSYM("WinMain","@16")))
1830 pe_type = PE_GUI;
1831 else
1832 if (find_elf_sym(symtab_section, PE_STDSYM("wWinMain","@16"))) {
1833 pe_type = PE_GUI;
1834 unicode_entry = PE_GUI;
1835 }
1836 else
1837 if (TCC_OUTPUT_DLL == s1->output_type) {
1838 pe_type = PE_DLL;
1839 /* need this for 'tccelf.c:relocate_section()' */
1840 s1->output_type = TCC_OUTPUT_EXE;
1841 }
1842 else {
1843 pe_type = PE_EXE;
1844 if (find_elf_sym(symtab_section, "wmain"))
1845 unicode_entry = PE_EXE;
1846 }
1847
1848 start_symbol =
1849 TCC_OUTPUT_MEMORY == s1->output_type
1850 ? PE_GUI == pe_type ? (unicode_entry ? "__runwwinmain" : "__runwinmain")
1851 : (unicode_entry ? "__runwmain" : "__runmain")
1852 : PE_DLL == pe_type ? PE_STDSYM("__dllstart","@12")
1853 : PE_GUI == pe_type ? (unicode_entry ? "__wwinstart": "__winstart")
1854 : (unicode_entry ? "__wstart" : "__start")
1855 ;
1856
1857 if (!s1->leading_underscore || strchr(start_symbol, '@'))
1858 ++start_symbol;
1859
1860 /* grab the startup code from libtcc1 */
1861 #ifdef TCC_IS_NATIVE
1862 if (TCC_OUTPUT_MEMORY != s1->output_type || s1->runtime_main)
1863 #endif
1864 set_elf_sym(symtab_section,
1865 0, 0,
1866 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1867 SHN_UNDEF, start_symbol);
1868
1869 if (0 == s1->nostdlib) {
1870 static const char *libs[] = {
1871 TCC_LIBTCC1, "msvcrt", "kernel32", "", "user32", "gdi32", NULL
1872 };
1873 const char **pp, *p;
1874 for (pp = libs; 0 != (p = *pp); ++pp) {
1875 if (0 == *p) {
1876 if (PE_DLL != pe_type && PE_GUI != pe_type)
1877 break;
1878 } else if (pp == libs && tcc_add_dll(s1, p, 0) >= 0) {
1879 continue;
1880 } else {
1881 tcc_add_library_err(s1, p);
1882 }
1883 }
1884 }
1885
1886 if (TCC_OUTPUT_MEMORY == s1->output_type)
1887 pe_type = PE_RUN;
1888 pe->type = pe_type;
1889 pe->start_symbol = start_symbol;
1890 }
1891
1892 static void pe_set_options(TCCState * s1, struct pe_info *pe)
1893 {
1894 if (PE_DLL == pe->type) {
1895 /* XXX: check if is correct for arm-pe target */
1896 pe->imagebase = 0x10000000;
1897 } else {
1898 #if defined(TCC_TARGET_ARM)
1899 pe->imagebase = 0x00010000;
1900 #else
1901 pe->imagebase = 0x00400000;
1902 #endif
1903 }
1904
1905 #if defined(TCC_TARGET_ARM)
1906 /* we use "console" subsystem by default */
1907 pe->subsystem = 9;
1908 #else
1909 if (PE_DLL == pe->type || PE_GUI == pe->type)
1910 pe->subsystem = 2;
1911 else
1912 pe->subsystem = 3;
1913 #endif
1914 /* Allow override via -Wl,-subsystem=... option */
1915 if (s1->pe_subsystem != 0)
1916 pe->subsystem = s1->pe_subsystem;
1917
1918 /* set default file/section alignment */
1919 if (pe->subsystem == 1) {
1920 pe->section_align = 0x20;
1921 pe->file_align = 0x20;
1922 } else {
1923 pe->section_align = 0x1000;
1924 pe->file_align = 0x200;
1925 }
1926
1927 if (s1->section_align != 0)
1928 pe->section_align = s1->section_align;
1929 if (s1->pe_file_align != 0)
1930 pe->file_align = s1->pe_file_align;
1931
1932 if ((pe->subsystem >= 10) && (pe->subsystem <= 12))
1933 pe->imagebase = 0;
1934
1935 if (s1->has_text_addr)
1936 pe->imagebase = s1->text_addr;
1937 }
1938
1939 ST_FUNC int pe_output_file(TCCState *s1, const char *filename)
1940 {
1941 int ret;
1942 struct pe_info pe;
1943 int i;
1944
1945 memset(&pe, 0, sizeof pe);
1946 pe.filename = filename;
1947 pe.s1 = s1;
1948
1949 tcc_add_runtime(s1);
1950 pe_add_runtime(s1, &pe);
1951 resolve_common_syms(s1);
1952 pe_set_options(s1, &pe);
1953
1954 ret = pe_check_symbols(&pe);
1955 if (ret)
1956 ;
1957 else if (filename) {
1958 pe_assign_addresses(&pe);
1959 relocate_syms(s1, s1->symtab, 0);
1960 s1->pe_imagebase = pe.imagebase;
1961 for (i = 1; i < s1->nb_sections; ++i) {
1962 Section *s = s1->sections[i];
1963 if (s->reloc) {
1964 relocate_section(s1, s);
1965 }
1966 }
1967 pe.start_addr = (DWORD)
1968 ((uintptr_t)tcc_get_symbol_err(s1, pe.start_symbol)
1969 - pe.imagebase);
1970 if (s1->nb_errors)
1971 ret = -1;
1972 else
1973 ret = pe_write(&pe);
1974 tcc_free(pe.sec_info);
1975 } else {
1976 #ifdef TCC_IS_NATIVE
1977 pe.thunk = data_section;
1978 pe_build_imports(&pe);
1979 s1->runtime_main = pe.start_symbol;
1980 #ifdef TCC_TARGET_X86_64
1981 s1->uw_pdata = find_section(s1, ".pdata");
1982 #endif
1983 #endif
1984 }
1985
1986 pe_free_imports(&pe);
1987
1988 #ifdef PE_PRINT_SECTIONS
1989 pe_print_sections(s1, "tcc.log");
1990 #endif
1991 return ret;
1992 }
1993
1994 /* ------------------------------------------------------------- */
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