tccgen: nocode_wanted: do not output constants
[tinycc.git] / libtcc.c
1 /*
2 * TCC - Tiny C Compiler
3 *
4 * Copyright (c) 2001-2004 Fabrice Bellard
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 /********************************************************/
24 /* global variables */
25
26 /* use GNU C extensions */
27 ST_DATA int gnu_ext = 1;
28
29 /* use TinyCC extensions */
30 ST_DATA int tcc_ext = 1;
31
32 /* XXX: get rid of this ASAP */
33 ST_DATA struct TCCState *tcc_state;
34
35 /********************************************************/
36
37 #ifdef ONE_SOURCE
38 #include "tccpp.c"
39 #include "tccgen.c"
40 #include "tccelf.c"
41 #include "tccrun.c"
42 #ifdef TCC_TARGET_I386
43 #include "i386-gen.c"
44 #endif
45 #ifdef TCC_TARGET_ARM
46 #include "arm-gen.c"
47 #endif
48 #ifdef TCC_TARGET_C67
49 #include "c67-gen.c"
50 #endif
51 #ifdef TCC_TARGET_X86_64
52 #include "x86_64-gen.c"
53 #endif
54 #ifdef CONFIG_TCC_ASM
55 #include "tccasm.c"
56 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64
57 #include "i386-asm.c"
58 #endif
59 #endif
60 #ifdef TCC_TARGET_COFF
61 #include "tcccoff.c"
62 #endif
63 #ifdef TCC_TARGET_PE
64 #include "tccpe.c"
65 #endif
66 #endif /* ONE_SOURCE */
67
68 /********************************************************/
69 #ifndef CONFIG_TCC_ASM
70 ST_FUNC void asm_instr(void)
71 {
72 tcc_error("inline asm() not supported");
73 }
74 ST_FUNC void asm_global_instr(void)
75 {
76 tcc_error("inline asm() not supported");
77 }
78 #endif
79
80 /********************************************************/
81 #ifdef _WIN32
82 static char *normalize_slashes(char *path)
83 {
84 char *p;
85 for (p = path; *p; ++p)
86 if (*p == '\\')
87 *p = '/';
88 return path;
89 }
90
91 static HMODULE tcc_module;
92
93 /* on win32, we suppose the lib and includes are at the location of 'tcc.exe' */
94 static void tcc_set_lib_path_w32(TCCState *s)
95 {
96 char path[1024], *p;
97 GetModuleFileNameA(tcc_module, path, sizeof path);
98 p = tcc_basename(normalize_slashes(strlwr(path)));
99 if (p - 5 > path && 0 == strncmp(p - 5, "/bin/", 5))
100 p -= 5;
101 else if (p > path)
102 p--;
103 *p = 0;
104 tcc_set_lib_path(s, path);
105 }
106
107 #ifdef TCC_TARGET_PE
108 static void tcc_add_systemdir(TCCState *s)
109 {
110 char buf[1000];
111 GetSystemDirectory(buf, sizeof buf);
112 tcc_add_library_path(s, normalize_slashes(buf));
113 }
114 #endif
115
116 #ifndef CONFIG_TCC_STATIC
117 void dlclose(void *p)
118 {
119 FreeLibrary((HMODULE)p);
120 }
121 #endif
122
123 #ifdef LIBTCC_AS_DLL
124 BOOL WINAPI DllMain (HINSTANCE hDll, DWORD dwReason, LPVOID lpReserved)
125 {
126 if (DLL_PROCESS_ATTACH == dwReason)
127 tcc_module = hDll;
128 return TRUE;
129 }
130 #endif
131 #endif
132
133 /********************************************************/
134 /* copy a string and truncate it. */
135 PUB_FUNC char *pstrcpy(char *buf, int buf_size, const char *s)
136 {
137 char *q, *q_end;
138 int c;
139
140 if (buf_size > 0) {
141 q = buf;
142 q_end = buf + buf_size - 1;
143 while (q < q_end) {
144 c = *s++;
145 if (c == '\0')
146 break;
147 *q++ = c;
148 }
149 *q = '\0';
150 }
151 return buf;
152 }
153
154 /* strcat and truncate. */
155 PUB_FUNC char *pstrcat(char *buf, int buf_size, const char *s)
156 {
157 int len;
158 len = strlen(buf);
159 if (len < buf_size)
160 pstrcpy(buf + len, buf_size - len, s);
161 return buf;
162 }
163
164 PUB_FUNC char *pstrncpy(char *out, const char *in, size_t num)
165 {
166 memcpy(out, in, num);
167 out[num] = '\0';
168 return out;
169 }
170
171 /* extract the basename of a file */
172 PUB_FUNC char *tcc_basename(const char *name)
173 {
174 char *p = strchr(name, 0);
175 while (p > name && !IS_DIRSEP(p[-1]))
176 --p;
177 return p;
178 }
179
180 /* extract extension part of a file
181 *
182 * (if no extension, return pointer to end-of-string)
183 */
184 PUB_FUNC char *tcc_fileextension (const char *name)
185 {
186 char *b = tcc_basename(name);
187 char *e = strrchr(b, '.');
188 return e ? e : strchr(b, 0);
189 }
190
191 /********************************************************/
192 /* memory management */
193
194 #undef free
195 #undef malloc
196 #undef realloc
197
198 #ifdef MEM_DEBUG
199 ST_DATA int mem_cur_size;
200 ST_DATA int mem_max_size;
201 unsigned malloc_usable_size(void*);
202 #endif
203
204 PUB_FUNC void tcc_free(void *ptr)
205 {
206 #ifdef MEM_DEBUG
207 mem_cur_size -= malloc_usable_size(ptr);
208 #endif
209 free(ptr);
210 }
211
212 PUB_FUNC void *tcc_malloc(unsigned long size)
213 {
214 void *ptr;
215 ptr = malloc(size);
216 if (!ptr && size)
217 tcc_error("memory full (malloc)");
218 #ifdef MEM_DEBUG
219 mem_cur_size += malloc_usable_size(ptr);
220 if (mem_cur_size > mem_max_size)
221 mem_max_size = mem_cur_size;
222 #endif
223 return ptr;
224 }
225
226 PUB_FUNC void *tcc_mallocz(unsigned long size)
227 {
228 void *ptr;
229 ptr = tcc_malloc(size);
230 memset(ptr, 0, size);
231 return ptr;
232 }
233
234 PUB_FUNC void *tcc_realloc(void *ptr, unsigned long size)
235 {
236 void *ptr1;
237 #ifdef MEM_DEBUG
238 mem_cur_size -= malloc_usable_size(ptr);
239 #endif
240 ptr1 = realloc(ptr, size);
241 if (!ptr1 && size)
242 tcc_error("memory full (realloc)");
243 #ifdef MEM_DEBUG
244 /* NOTE: count not correct if alloc error, but not critical */
245 mem_cur_size += malloc_usable_size(ptr1);
246 if (mem_cur_size > mem_max_size)
247 mem_max_size = mem_cur_size;
248 #endif
249 return ptr1;
250 }
251
252 PUB_FUNC char *tcc_strdup(const char *str)
253 {
254 char *ptr;
255 ptr = tcc_malloc(strlen(str) + 1);
256 strcpy(ptr, str);
257 return ptr;
258 }
259
260 PUB_FUNC void tcc_memstats(void)
261 {
262 #ifdef MEM_DEBUG
263 printf("memory: %d bytes, max = %d bytes\n", mem_cur_size, mem_max_size);
264 #endif
265 }
266
267 #define free(p) use_tcc_free(p)
268 #define malloc(s) use_tcc_malloc(s)
269 #define realloc(p, s) use_tcc_realloc(p, s)
270
271 /********************************************************/
272 /* dynarrays */
273
274 ST_FUNC void dynarray_add(void ***ptab, int *nb_ptr, void *data)
275 {
276 int nb, nb_alloc;
277 void **pp;
278
279 nb = *nb_ptr;
280 pp = *ptab;
281 /* every power of two we double array size */
282 if ((nb & (nb - 1)) == 0) {
283 if (!nb)
284 nb_alloc = 1;
285 else
286 nb_alloc = nb * 2;
287 pp = tcc_realloc(pp, nb_alloc * sizeof(void *));
288 *ptab = pp;
289 }
290 pp[nb++] = data;
291 *nb_ptr = nb;
292 }
293
294 ST_FUNC void dynarray_reset(void *pp, int *n)
295 {
296 void **p;
297 for (p = *(void***)pp; *n; ++p, --*n)
298 if (*p)
299 tcc_free(*p);
300 tcc_free(*(void**)pp);
301 *(void**)pp = NULL;
302 }
303
304 static void tcc_split_path(TCCState *s, void ***p_ary, int *p_nb_ary, const char *in)
305 {
306 const char *p;
307 do {
308 int c;
309 CString str;
310
311 cstr_new(&str);
312 for (p = in; c = *p, c != '\0' && c != PATHSEP; ++p) {
313 if (c == '{' && p[1] && p[2] == '}') {
314 c = p[1], p += 2;
315 if (c == 'B')
316 cstr_cat(&str, s->tcc_lib_path);
317 } else {
318 cstr_ccat(&str, c);
319 }
320 }
321 cstr_ccat(&str, '\0');
322 dynarray_add(p_ary, p_nb_ary, str.data);
323 in = p+1;
324 } while (*p);
325 }
326
327 /********************************************************/
328
329 ST_FUNC Section *new_section(TCCState *s1, const char *name, int sh_type, int sh_flags)
330 {
331 Section *sec;
332
333 sec = tcc_mallocz(sizeof(Section) + strlen(name));
334 strcpy(sec->name, name);
335 sec->sh_type = sh_type;
336 sec->sh_flags = sh_flags;
337 switch(sh_type) {
338 case SHT_HASH:
339 case SHT_REL:
340 case SHT_RELA:
341 case SHT_DYNSYM:
342 case SHT_SYMTAB:
343 case SHT_DYNAMIC:
344 sec->sh_addralign = 4;
345 break;
346 case SHT_STRTAB:
347 sec->sh_addralign = 1;
348 break;
349 default:
350 sec->sh_addralign = 32; /* default conservative alignment */
351 break;
352 }
353
354 if (sh_flags & SHF_PRIVATE) {
355 dynarray_add((void ***)&s1->priv_sections, &s1->nb_priv_sections, sec);
356 } else {
357 sec->sh_num = s1->nb_sections;
358 dynarray_add((void ***)&s1->sections, &s1->nb_sections, sec);
359 }
360
361 return sec;
362 }
363
364 static void free_section(Section *s)
365 {
366 tcc_free(s->data);
367 }
368
369 /* realloc section and set its content to zero */
370 ST_FUNC void section_realloc(Section *sec, unsigned long new_size)
371 {
372 unsigned long size;
373 unsigned char *data;
374
375 size = sec->data_allocated;
376 if (size == 0)
377 size = 1;
378 while (size < new_size)
379 size = size * 2;
380 data = tcc_realloc(sec->data, size);
381 memset(data + sec->data_allocated, 0, size - sec->data_allocated);
382 sec->data = data;
383 sec->data_allocated = size;
384 }
385
386 /* reserve at least 'size' bytes in section 'sec' from
387 sec->data_offset. */
388 ST_FUNC void *section_ptr_add(Section *sec, unsigned long size)
389 {
390 unsigned long offset, offset1;
391
392 offset = sec->data_offset;
393 offset1 = offset + size;
394 if (offset1 > sec->data_allocated)
395 section_realloc(sec, offset1);
396 sec->data_offset = offset1;
397 return sec->data + offset;
398 }
399
400 /* reserve at least 'size' bytes from section start */
401 ST_FUNC void section_reserve(Section *sec, unsigned long size)
402 {
403 if (size > sec->data_allocated)
404 section_realloc(sec, size);
405 if (size > sec->data_offset)
406 sec->data_offset = size;
407 }
408
409 /* return a reference to a section, and create it if it does not
410 exists */
411 ST_FUNC Section *find_section(TCCState *s1, const char *name)
412 {
413 Section *sec;
414 int i;
415 for(i = 1; i < s1->nb_sections; i++) {
416 sec = s1->sections[i];
417 if (!strcmp(name, sec->name))
418 return sec;
419 }
420 /* sections are created as PROGBITS */
421 return new_section(s1, name, SHT_PROGBITS, SHF_ALLOC);
422 }
423
424 /* update sym->c so that it points to an external symbol in section
425 'section' with value 'value' */
426 ST_FUNC void put_extern_sym2(Sym *sym, Section *section,
427 addr_t value, unsigned long size,
428 int can_add_underscore)
429 {
430 int sym_type, sym_bind, sh_num, info, other;
431 ElfW(Sym) *esym;
432 const char *name;
433 char buf1[256];
434
435 if (section == NULL)
436 sh_num = SHN_UNDEF;
437 else if (section == SECTION_ABS)
438 sh_num = SHN_ABS;
439 else
440 sh_num = section->sh_num;
441
442 if ((sym->type.t & VT_BTYPE) == VT_FUNC) {
443 sym_type = STT_FUNC;
444 } else if ((sym->type.t & VT_BTYPE) == VT_VOID) {
445 sym_type = STT_NOTYPE;
446 } else {
447 sym_type = STT_OBJECT;
448 }
449
450 if (sym->type.t & VT_STATIC)
451 sym_bind = STB_LOCAL;
452 else {
453 if (sym->type.t & VT_WEAK)
454 sym_bind = STB_WEAK;
455 else
456 sym_bind = STB_GLOBAL;
457 }
458
459 if (!sym->c) {
460 name = get_tok_str(sym->v, NULL);
461 #ifdef CONFIG_TCC_BCHECK
462 if (tcc_state->do_bounds_check) {
463 char buf[32];
464
465 /* XXX: avoid doing that for statics ? */
466 /* if bound checking is activated, we change some function
467 names by adding the "__bound" prefix */
468 switch(sym->v) {
469 #ifdef TCC_TARGET_PE
470 /* XXX: we rely only on malloc hooks */
471 case TOK_malloc:
472 case TOK_free:
473 case TOK_realloc:
474 case TOK_memalign:
475 case TOK_calloc:
476 #endif
477 case TOK_memcpy:
478 case TOK_memmove:
479 case TOK_memset:
480 case TOK_strlen:
481 case TOK_strcpy:
482 case TOK_alloca:
483 strcpy(buf, "__bound_");
484 strcat(buf, name);
485 name = buf;
486 break;
487 }
488 }
489 #endif
490 other = 0;
491
492 #ifdef TCC_TARGET_PE
493 if (sym->type.t & VT_EXPORT)
494 other |= ST_PE_EXPORT;
495 if (sym_type == STT_FUNC && sym->type.ref) {
496 Sym *ref = sym->type.ref;
497 if (ref->a.func_export)
498 other |= ST_PE_EXPORT;
499 if (ref->a.func_call == FUNC_STDCALL && can_add_underscore) {
500 sprintf(buf1, "_%s@%d", name, ref->a.func_args * PTR_SIZE);
501 name = buf1;
502 other |= ST_PE_STDCALL;
503 can_add_underscore = 0;
504 }
505 } else {
506 if (find_elf_sym(tcc_state->dynsymtab_section, name))
507 other |= ST_PE_IMPORT;
508 if (sym->type.t & VT_IMPORT)
509 other |= ST_PE_IMPORT;
510 }
511 #else
512 if (! (sym->type.t & VT_STATIC))
513 other = (sym->type.t & VT_VIS_MASK) >> VT_VIS_SHIFT;
514 #endif
515 if (tcc_state->leading_underscore && can_add_underscore) {
516 buf1[0] = '_';
517 pstrcpy(buf1 + 1, sizeof(buf1) - 1, name);
518 name = buf1;
519 }
520 if (sym->asm_label) {
521 name = sym->asm_label;
522 }
523 info = ELFW(ST_INFO)(sym_bind, sym_type);
524 sym->c = add_elf_sym(symtab_section, value, size, info, other, sh_num, name);
525 } else {
526 esym = &((ElfW(Sym) *)symtab_section->data)[sym->c];
527 esym->st_value = value;
528 esym->st_size = size;
529 esym->st_shndx = sh_num;
530 }
531 }
532
533 ST_FUNC void put_extern_sym(Sym *sym, Section *section,
534 addr_t value, unsigned long size)
535 {
536 put_extern_sym2(sym, section, value, size, 1);
537 }
538
539 /* add a new relocation entry to symbol 'sym' in section 's' */
540 ST_FUNC void greloc(Section *s, Sym *sym, unsigned long offset, int type)
541 {
542 int c = 0;
543 if (sym) {
544 if (0 == sym->c)
545 put_extern_sym(sym, NULL, 0, 0);
546 c = sym->c;
547 }
548 /* now we can add ELF relocation info */
549 put_elf_reloc(symtab_section, s, offset, type, c);
550 }
551
552 /********************************************************/
553
554 static void strcat_vprintf(char *buf, int buf_size, const char *fmt, va_list ap)
555 {
556 int len;
557 len = strlen(buf);
558 vsnprintf(buf + len, buf_size - len, fmt, ap);
559 }
560
561 static void strcat_printf(char *buf, int buf_size, const char *fmt, ...)
562 {
563 va_list ap;
564 va_start(ap, fmt);
565 strcat_vprintf(buf, buf_size, fmt, ap);
566 va_end(ap);
567 }
568
569 static void error1(TCCState *s1, int is_warning, const char *fmt, va_list ap)
570 {
571 char buf[2048];
572 BufferedFile **pf, *f;
573
574 buf[0] = '\0';
575 /* use upper file if inline ":asm:" or token ":paste:" */
576 for (f = file; f && f->filename[0] == ':'; f = f->prev)
577 ;
578 if (f) {
579 for(pf = s1->include_stack; pf < s1->include_stack_ptr; pf++)
580 strcat_printf(buf, sizeof(buf), "In file included from %s:%d:\n",
581 (*pf)->filename, (*pf)->line_num);
582 if (f->line_num > 0) {
583 strcat_printf(buf, sizeof(buf), "%s:%d: ",
584 f->filename, f->line_num);
585 } else {
586 strcat_printf(buf, sizeof(buf), "%s: ",
587 f->filename);
588 }
589 } else {
590 strcat_printf(buf, sizeof(buf), "tcc: ");
591 }
592 if (is_warning)
593 strcat_printf(buf, sizeof(buf), "warning: ");
594 else
595 strcat_printf(buf, sizeof(buf), "error: ");
596 strcat_vprintf(buf, sizeof(buf), fmt, ap);
597
598 if (!s1->error_func) {
599 /* default case: stderr */
600 fprintf(stderr, "%s\n", buf);
601 } else {
602 s1->error_func(s1->error_opaque, buf);
603 }
604 if (!is_warning || s1->warn_error)
605 s1->nb_errors++;
606 }
607
608 LIBTCCAPI void tcc_set_error_func(TCCState *s, void *error_opaque,
609 void (*error_func)(void *opaque, const char *msg))
610 {
611 s->error_opaque = error_opaque;
612 s->error_func = error_func;
613 }
614
615 /* error without aborting current compilation */
616 PUB_FUNC void tcc_error_noabort(const char *fmt, ...)
617 {
618 TCCState *s1 = tcc_state;
619 va_list ap;
620
621 va_start(ap, fmt);
622 error1(s1, 0, fmt, ap);
623 va_end(ap);
624 }
625
626 PUB_FUNC void tcc_error(const char *fmt, ...)
627 {
628 TCCState *s1 = tcc_state;
629 va_list ap;
630
631 va_start(ap, fmt);
632 error1(s1, 0, fmt, ap);
633 va_end(ap);
634 /* better than nothing: in some cases, we accept to handle errors */
635 if (s1->error_set_jmp_enabled) {
636 longjmp(s1->error_jmp_buf, 1);
637 } else {
638 /* XXX: eliminate this someday */
639 exit(1);
640 }
641 }
642
643 PUB_FUNC void tcc_warning(const char *fmt, ...)
644 {
645 TCCState *s1 = tcc_state;
646 va_list ap;
647
648 if (s1->warn_none)
649 return;
650
651 va_start(ap, fmt);
652 error1(s1, 1, fmt, ap);
653 va_end(ap);
654 }
655
656 /********************************************************/
657 /* I/O layer */
658
659 ST_FUNC void tcc_open_bf(TCCState *s1, const char *filename, int initlen)
660 {
661 BufferedFile *bf;
662 int buflen = initlen ? initlen : IO_BUF_SIZE;
663
664 bf = tcc_malloc(sizeof(BufferedFile) + buflen);
665 bf->buf_ptr = bf->buffer;
666 bf->buf_end = bf->buffer + initlen;
667 bf->buf_end[0] = CH_EOB; /* put eob symbol */
668 pstrcpy(bf->filename, sizeof(bf->filename), filename);
669 #ifdef _WIN32
670 normalize_slashes(bf->filename);
671 #endif
672 bf->line_num = 1;
673 bf->ifndef_macro = 0;
674 bf->ifdef_stack_ptr = s1->ifdef_stack_ptr;
675 bf->fd = -1;
676 bf->prev = file;
677 file = bf;
678 }
679
680 ST_FUNC void tcc_close(void)
681 {
682 BufferedFile *bf = file;
683 if (bf->fd > 0) {
684 close(bf->fd);
685 total_lines += bf->line_num;
686 }
687 file = bf->prev;
688 tcc_free(bf);
689 }
690
691 ST_FUNC int tcc_open(TCCState *s1, const char *filename)
692 {
693 int fd;
694 if (strcmp(filename, "-") == 0)
695 fd = 0, filename = "stdin";
696 else
697 fd = open(filename, O_RDONLY | O_BINARY);
698 if ((s1->verbose == 2 && fd >= 0) || s1->verbose == 3)
699 printf("%s %*s%s\n", fd < 0 ? "nf":"->",
700 (int)(s1->include_stack_ptr - s1->include_stack), "", filename);
701 if (fd < 0)
702 return -1;
703
704 tcc_open_bf(s1, filename, 0);
705 file->fd = fd;
706 return fd;
707 }
708
709 /* compile the C file opened in 'file'. Return non zero if errors. */
710 static int tcc_compile(TCCState *s1)
711 {
712 Sym *define_start;
713 SValue *pvtop;
714 char buf[512];
715 volatile int section_sym;
716
717 #ifdef INC_DEBUG
718 printf("%s: **** new file\n", file->filename);
719 #endif
720 preprocess_init(s1);
721
722 cur_text_section = NULL;
723 funcname = "";
724 anon_sym = SYM_FIRST_ANOM;
725
726 /* file info: full path + filename */
727 section_sym = 0; /* avoid warning */
728 if (s1->do_debug) {
729 section_sym = put_elf_sym(symtab_section, 0, 0,
730 ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
731 text_section->sh_num, NULL);
732 getcwd(buf, sizeof(buf));
733 #ifdef _WIN32
734 normalize_slashes(buf);
735 #endif
736 pstrcat(buf, sizeof(buf), "/");
737 put_stabs_r(buf, N_SO, 0, 0,
738 text_section->data_offset, text_section, section_sym);
739 put_stabs_r(file->filename, N_SO, 0, 0,
740 text_section->data_offset, text_section, section_sym);
741 }
742 /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
743 symbols can be safely used */
744 put_elf_sym(symtab_section, 0, 0,
745 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
746 SHN_ABS, file->filename);
747
748 /* define some often used types */
749 int_type.t = VT_INT;
750
751 char_pointer_type.t = VT_BYTE;
752 mk_pointer(&char_pointer_type);
753
754 #if PTR_SIZE == 4
755 size_type.t = VT_INT;
756 #else
757 size_type.t = VT_LLONG;
758 #endif
759
760 func_old_type.t = VT_FUNC;
761 func_old_type.ref = sym_push(SYM_FIELD, &int_type, FUNC_CDECL, FUNC_OLD);
762 #ifdef TCC_TARGET_ARM
763 arm_init(s1);
764 #endif
765
766 #if 0
767 /* define 'void *alloca(unsigned int)' builtin function */
768 {
769 Sym *s1;
770
771 p = anon_sym++;
772 sym = sym_push(p, mk_pointer(VT_VOID), FUNC_CDECL, FUNC_NEW);
773 s1 = sym_push(SYM_FIELD, VT_UNSIGNED | VT_INT, 0, 0);
774 s1->next = NULL;
775 sym->next = s1;
776 sym_push(TOK_alloca, VT_FUNC | (p << VT_STRUCT_SHIFT), VT_CONST, 0);
777 }
778 #endif
779
780 define_start = define_stack;
781
782 if (setjmp(s1->error_jmp_buf) == 0) {
783 s1->nb_errors = 0;
784 s1->error_set_jmp_enabled = 1;
785
786 ch = file->buf_ptr[0];
787 tok_flags = TOK_FLAG_BOL | TOK_FLAG_BOF;
788 parse_flags = PARSE_FLAG_PREPROCESS | PARSE_FLAG_TOK_NUM;
789 pvtop = vtop;
790 next();
791 decl(VT_CONST);
792 if (tok != TOK_EOF)
793 expect("declaration");
794 if (pvtop != vtop)
795 tcc_warning("internal compiler error: vstack leak? (%d)", vtop - pvtop);
796
797 /* end of translation unit info */
798 if (s1->do_debug) {
799 put_stabs_r(NULL, N_SO, 0, 0,
800 text_section->data_offset, text_section, section_sym);
801 }
802 }
803
804 s1->error_set_jmp_enabled = 0;
805
806 /* reset define stack, but leave -Dsymbols (may be incorrect if
807 they are undefined) */
808 free_defines(define_start);
809
810 gen_inline_functions();
811
812 sym_pop(&global_stack, NULL);
813 sym_pop(&local_stack, NULL);
814
815 return s1->nb_errors != 0 ? -1 : 0;
816 }
817
818 LIBTCCAPI int tcc_compile_string(TCCState *s, const char *str)
819 {
820 int len, ret;
821 len = strlen(str);
822
823 tcc_open_bf(s, "<string>", len);
824 memcpy(file->buffer, str, len);
825 ret = tcc_compile(s);
826 tcc_close();
827 return ret;
828 }
829
830 /* define a preprocessor symbol. A value can also be provided with the '=' operator */
831 LIBTCCAPI void tcc_define_symbol(TCCState *s1, const char *sym, const char *value)
832 {
833 int len1, len2;
834 /* default value */
835 if (!value)
836 value = "1";
837 len1 = strlen(sym);
838 len2 = strlen(value);
839
840 /* init file structure */
841 tcc_open_bf(s1, "<define>", len1 + len2 + 1);
842 memcpy(file->buffer, sym, len1);
843 file->buffer[len1] = ' ';
844 memcpy(file->buffer + len1 + 1, value, len2);
845
846 /* parse with define parser */
847 ch = file->buf_ptr[0];
848 next_nomacro();
849 parse_define();
850
851 tcc_close();
852 }
853
854 /* undefine a preprocessor symbol */
855 LIBTCCAPI void tcc_undefine_symbol(TCCState *s1, const char *sym)
856 {
857 TokenSym *ts;
858 Sym *s;
859 ts = tok_alloc(sym, strlen(sym));
860 s = define_find(ts->tok);
861 /* undefine symbol by putting an invalid name */
862 if (s)
863 define_undef(s);
864 }
865
866 /* cleanup all static data used during compilation */
867 static void tcc_cleanup(void)
868 {
869 int i, n;
870 if (NULL == tcc_state)
871 return;
872 tcc_state = NULL;
873
874 /* free -D defines */
875 free_defines(NULL);
876
877 /* free tokens */
878 n = tok_ident - TOK_IDENT;
879 for(i = 0; i < n; i++)
880 tcc_free(table_ident[i]);
881 tcc_free(table_ident);
882
883 /* free sym_pools */
884 dynarray_reset(&sym_pools, &nb_sym_pools);
885 /* string buffer */
886 cstr_free(&tokcstr);
887 /* reset symbol stack */
888 sym_free_first = NULL;
889 /* cleanup from error/setjmp */
890 macro_ptr = NULL;
891 }
892
893 LIBTCCAPI TCCState *tcc_new(void)
894 {
895 TCCState *s;
896 char buffer[100];
897 int a,b,c;
898
899 tcc_cleanup();
900
901 s = tcc_mallocz(sizeof(TCCState));
902 if (!s)
903 return NULL;
904 tcc_state = s;
905 #ifdef _WIN32
906 tcc_set_lib_path_w32(s);
907 #else
908 tcc_set_lib_path(s, CONFIG_TCCDIR);
909 #endif
910 s->output_type = TCC_OUTPUT_MEMORY;
911 preprocess_new();
912 s->include_stack_ptr = s->include_stack;
913
914 /* we add dummy defines for some special macros to speed up tests
915 and to have working defined() */
916 define_push(TOK___LINE__, MACRO_OBJ, NULL, NULL);
917 define_push(TOK___FILE__, MACRO_OBJ, NULL, NULL);
918 define_push(TOK___DATE__, MACRO_OBJ, NULL, NULL);
919 define_push(TOK___TIME__, MACRO_OBJ, NULL, NULL);
920
921 /* define __TINYC__ 92X */
922 sscanf(TCC_VERSION, "%d.%d.%d", &a, &b, &c);
923 sprintf(buffer, "%d", a*10000 + b*100 + c);
924 tcc_define_symbol(s, "__TINYC__", buffer);
925
926 /* standard defines */
927 tcc_define_symbol(s, "__STDC__", NULL);
928 tcc_define_symbol(s, "__STDC_VERSION__", "199901L");
929 tcc_define_symbol(s, "__STDC_HOSTED__", NULL);
930
931 /* target defines */
932 #if defined(TCC_TARGET_I386)
933 tcc_define_symbol(s, "__i386__", NULL);
934 tcc_define_symbol(s, "__i386", NULL);
935 tcc_define_symbol(s, "i386", NULL);
936 #elif defined(TCC_TARGET_X86_64)
937 tcc_define_symbol(s, "__x86_64__", NULL);
938 #elif defined(TCC_TARGET_ARM)
939 tcc_define_symbol(s, "__ARM_ARCH_4__", NULL);
940 tcc_define_symbol(s, "__arm_elf__", NULL);
941 tcc_define_symbol(s, "__arm_elf", NULL);
942 tcc_define_symbol(s, "arm_elf", NULL);
943 tcc_define_symbol(s, "__arm__", NULL);
944 tcc_define_symbol(s, "__arm", NULL);
945 tcc_define_symbol(s, "arm", NULL);
946 tcc_define_symbol(s, "__APCS_32__", NULL);
947 tcc_define_symbol(s, "__ARMEL__", NULL);
948 #if defined(TCC_ARM_EABI)
949 tcc_define_symbol(s, "__ARM_EABI__", NULL);
950 #endif
951 #if defined(TCC_ARM_HARDFLOAT)
952 s->float_abi = ARM_HARD_FLOAT;
953 tcc_define_symbol(s, "__ARM_PCS_VFP", NULL);
954 #else
955 s->float_abi = ARM_SOFTFP_FLOAT;
956 #endif
957 #endif
958
959 #ifdef TCC_TARGET_PE
960 tcc_define_symbol(s, "_WIN32", NULL);
961 # ifdef TCC_TARGET_X86_64
962 tcc_define_symbol(s, "_WIN64", NULL);
963 # endif
964 #else
965 tcc_define_symbol(s, "__unix__", NULL);
966 tcc_define_symbol(s, "__unix", NULL);
967 tcc_define_symbol(s, "unix", NULL);
968 # if defined(__linux)
969 tcc_define_symbol(s, "__linux__", NULL);
970 tcc_define_symbol(s, "__linux", NULL);
971 # endif
972 # if defined(__FreeBSD__)
973 # define str(s) #s
974 tcc_define_symbol(s, "__FreeBSD__", str( __FreeBSD__));
975 # undef str
976 # endif
977 # if defined(__FreeBSD_kernel__)
978 tcc_define_symbol(s, "__FreeBSD_kernel__", NULL);
979 # endif
980 #endif
981
982 /* TinyCC & gcc defines */
983 #if defined TCC_TARGET_PE && defined TCC_TARGET_X86_64
984 tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long long");
985 tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long long");
986 #else
987 tcc_define_symbol(s, "__SIZE_TYPE__", "unsigned long");
988 tcc_define_symbol(s, "__PTRDIFF_TYPE__", "long");
989 #endif
990
991 #ifdef TCC_TARGET_PE
992 tcc_define_symbol(s, "__WCHAR_TYPE__", "unsigned short");
993 tcc_define_symbol(s, "__WINT_TYPE__", "unsigned short");
994 #else
995 tcc_define_symbol(s, "__WCHAR_TYPE__", "int");
996 /* wint_t is unsigned int by default, but (signed) int on BSDs
997 and unsigned short on windows. Other OSes might have still
998 other conventions, sigh. */
999 #if defined(__FreeBSD__) || defined (__FreeBSD_kernel__)
1000 tcc_define_symbol(s, "__WINT_TYPE__", "int");
1001 #else
1002 tcc_define_symbol(s, "__WINT_TYPE__", "unsigned int");
1003 #endif
1004 #endif
1005
1006 #ifndef TCC_TARGET_PE
1007 /* glibc defines */
1008 tcc_define_symbol(s, "__REDIRECT(name, proto, alias)", "name proto __asm__ (#alias)");
1009 tcc_define_symbol(s, "__REDIRECT_NTH(name, proto, alias)", "name proto __asm__ (#alias) __THROW");
1010 /* paths for crt objects */
1011 tcc_split_path(s, (void ***)&s->crt_paths, &s->nb_crt_paths, CONFIG_TCC_CRTPREFIX);
1012 #endif
1013
1014 /* no section zero */
1015 dynarray_add((void ***)&s->sections, &s->nb_sections, NULL);
1016
1017 /* create standard sections */
1018 text_section = new_section(s, ".text", SHT_PROGBITS, SHF_ALLOC | SHF_EXECINSTR);
1019 data_section = new_section(s, ".data", SHT_PROGBITS, SHF_ALLOC | SHF_WRITE);
1020 bss_section = new_section(s, ".bss", SHT_NOBITS, SHF_ALLOC | SHF_WRITE);
1021
1022 /* symbols are always generated for linking stage */
1023 symtab_section = new_symtab(s, ".symtab", SHT_SYMTAB, 0,
1024 ".strtab",
1025 ".hashtab", SHF_PRIVATE);
1026 strtab_section = symtab_section->link;
1027 s->symtab = symtab_section;
1028
1029 /* private symbol table for dynamic symbols */
1030 s->dynsymtab_section = new_symtab(s, ".dynsymtab", SHT_SYMTAB, SHF_PRIVATE,
1031 ".dynstrtab",
1032 ".dynhashtab", SHF_PRIVATE);
1033 s->alacarte_link = 1;
1034 s->nocommon = 1;
1035
1036 #ifdef CHAR_IS_UNSIGNED
1037 s->char_is_unsigned = 1;
1038 #endif
1039 /* enable this if you want symbols with leading underscore on windows: */
1040 #if 0 /* def TCC_TARGET_PE */
1041 s->leading_underscore = 1;
1042 #endif
1043 #ifdef TCC_TARGET_I386
1044 s->seg_size = 32;
1045 #endif
1046 #ifdef TCC_IS_NATIVE
1047 s->runtime_main = "main";
1048 #endif
1049 return s;
1050 }
1051
1052 LIBTCCAPI void tcc_delete(TCCState *s1)
1053 {
1054 int i;
1055
1056 tcc_cleanup();
1057
1058 /* free all sections */
1059 for(i = 1; i < s1->nb_sections; i++)
1060 free_section(s1->sections[i]);
1061 dynarray_reset(&s1->sections, &s1->nb_sections);
1062
1063 for(i = 0; i < s1->nb_priv_sections; i++)
1064 free_section(s1->priv_sections[i]);
1065 dynarray_reset(&s1->priv_sections, &s1->nb_priv_sections);
1066
1067 /* free any loaded DLLs */
1068 #ifdef TCC_IS_NATIVE
1069 for ( i = 0; i < s1->nb_loaded_dlls; i++) {
1070 DLLReference *ref = s1->loaded_dlls[i];
1071 if ( ref->handle )
1072 dlclose(ref->handle);
1073 }
1074 #endif
1075
1076 /* free loaded dlls array */
1077 dynarray_reset(&s1->loaded_dlls, &s1->nb_loaded_dlls);
1078
1079 /* free library paths */
1080 dynarray_reset(&s1->library_paths, &s1->nb_library_paths);
1081 dynarray_reset(&s1->crt_paths, &s1->nb_crt_paths);
1082
1083 /* free include paths */
1084 dynarray_reset(&s1->cached_includes, &s1->nb_cached_includes);
1085 dynarray_reset(&s1->include_paths, &s1->nb_include_paths);
1086 dynarray_reset(&s1->sysinclude_paths, &s1->nb_sysinclude_paths);
1087
1088 tcc_free(s1->tcc_lib_path);
1089 tcc_free(s1->soname);
1090 tcc_free(s1->rpath);
1091 tcc_free(s1->init_symbol);
1092 tcc_free(s1->fini_symbol);
1093 tcc_free(s1->outfile);
1094 tcc_free(s1->deps_outfile);
1095 dynarray_reset(&s1->files, &s1->nb_files);
1096 dynarray_reset(&s1->target_deps, &s1->nb_target_deps);
1097
1098 #ifdef TCC_IS_NATIVE
1099 # ifdef HAVE_SELINUX
1100 munmap (s1->write_mem, s1->mem_size);
1101 munmap (s1->runtime_mem, s1->mem_size);
1102 # else
1103 tcc_free(s1->runtime_mem);
1104 # endif
1105 #endif
1106
1107 if(s1->sym_attrs) tcc_free(s1->sym_attrs);
1108
1109 tcc_free(s1);
1110 }
1111
1112 LIBTCCAPI int tcc_add_include_path(TCCState *s, const char *pathname)
1113 {
1114 tcc_split_path(s, (void ***)&s->include_paths, &s->nb_include_paths, pathname);
1115 return 0;
1116 }
1117
1118 LIBTCCAPI int tcc_add_sysinclude_path(TCCState *s, const char *pathname)
1119 {
1120 tcc_split_path(s, (void ***)&s->sysinclude_paths, &s->nb_sysinclude_paths, pathname);
1121 return 0;
1122 }
1123
1124 ST_FUNC int tcc_add_file_internal(TCCState *s1, const char *filename, int flags)
1125 {
1126 const char *ext;
1127 ElfW(Ehdr) ehdr;
1128 int fd, ret, size;
1129
1130 /* find source file type with extension */
1131 ext = tcc_fileextension(filename);
1132 if (ext[0])
1133 ext++;
1134
1135 #ifdef CONFIG_TCC_ASM
1136 /* if .S file, define __ASSEMBLER__ like gcc does */
1137 if (!strcmp(ext, "S"))
1138 tcc_define_symbol(s1, "__ASSEMBLER__", NULL);
1139 #endif
1140
1141 /* open the file */
1142 ret = tcc_open(s1, filename);
1143 if (ret < 0) {
1144 if (flags & AFF_PRINT_ERROR)
1145 tcc_error_noabort("file '%s' not found", filename);
1146 return ret;
1147 }
1148
1149 /* update target deps */
1150 dynarray_add((void ***)&s1->target_deps, &s1->nb_target_deps,
1151 tcc_strdup(filename));
1152
1153 if (flags & AFF_PREPROCESS) {
1154 ret = tcc_preprocess(s1);
1155 goto the_end;
1156 }
1157
1158 if (!ext[0] || !PATHCMP(ext, "c")) {
1159 /* C file assumed */
1160 ret = tcc_compile(s1);
1161 goto the_end;
1162 }
1163
1164 #ifdef CONFIG_TCC_ASM
1165 if (!strcmp(ext, "S")) {
1166 /* preprocessed assembler */
1167 ret = tcc_assemble(s1, 1);
1168 goto the_end;
1169 }
1170
1171 if (!strcmp(ext, "s")) {
1172 /* non preprocessed assembler */
1173 ret = tcc_assemble(s1, 0);
1174 goto the_end;
1175 }
1176 #endif
1177
1178 fd = file->fd;
1179 /* assume executable format: auto guess file type */
1180 size = read(fd, &ehdr, sizeof(ehdr));
1181 lseek(fd, 0, SEEK_SET);
1182 if (size <= 0) {
1183 tcc_error_noabort("could not read header");
1184 goto the_end;
1185 }
1186
1187 if (size == sizeof(ehdr) &&
1188 ehdr.e_ident[0] == ELFMAG0 &&
1189 ehdr.e_ident[1] == ELFMAG1 &&
1190 ehdr.e_ident[2] == ELFMAG2 &&
1191 ehdr.e_ident[3] == ELFMAG3) {
1192
1193 /* do not display line number if error */
1194 file->line_num = 0;
1195 if (ehdr.e_type == ET_REL) {
1196 ret = tcc_load_object_file(s1, fd, 0);
1197 goto the_end;
1198
1199 }
1200 #ifndef TCC_TARGET_PE
1201 if (ehdr.e_type == ET_DYN) {
1202 if (s1->output_type == TCC_OUTPUT_MEMORY) {
1203 #ifdef TCC_IS_NATIVE
1204 void *h;
1205 h = dlopen(filename, RTLD_GLOBAL | RTLD_LAZY);
1206 if (h)
1207 #endif
1208 ret = 0;
1209 } else {
1210 ret = tcc_load_dll(s1, fd, filename,
1211 (flags & AFF_REFERENCED_DLL) != 0);
1212 }
1213 goto the_end;
1214 }
1215 #endif
1216 tcc_error_noabort("unrecognized ELF file");
1217 goto the_end;
1218 }
1219
1220 if (memcmp((char *)&ehdr, ARMAG, 8) == 0) {
1221 file->line_num = 0; /* do not display line number if error */
1222 ret = tcc_load_archive(s1, fd);
1223 goto the_end;
1224 }
1225
1226 #ifdef TCC_TARGET_COFF
1227 if (*(uint16_t *)(&ehdr) == COFF_C67_MAGIC) {
1228 ret = tcc_load_coff(s1, fd);
1229 goto the_end;
1230 }
1231 #endif
1232
1233 #ifdef TCC_TARGET_PE
1234 ret = pe_load_file(s1, filename, fd);
1235 #else
1236 /* as GNU ld, consider it is an ld script if not recognized */
1237 ret = tcc_load_ldscript(s1);
1238 #endif
1239 if (ret < 0)
1240 tcc_error_noabort("unrecognized file type");
1241
1242 the_end:
1243 tcc_close();
1244 return ret;
1245 }
1246
1247 LIBTCCAPI int tcc_add_file(TCCState *s, const char *filename)
1248 {
1249 if (s->output_type == TCC_OUTPUT_PREPROCESS)
1250 return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR | AFF_PREPROCESS);
1251 else
1252 return tcc_add_file_internal(s, filename, AFF_PRINT_ERROR);
1253 }
1254
1255 LIBTCCAPI int tcc_add_library_path(TCCState *s, const char *pathname)
1256 {
1257 tcc_split_path(s, (void ***)&s->library_paths, &s->nb_library_paths, pathname);
1258 return 0;
1259 }
1260
1261 static int tcc_add_library_internal(TCCState *s, const char *fmt,
1262 const char *filename, int flags, char **paths, int nb_paths)
1263 {
1264 char buf[1024];
1265 int i;
1266
1267 for(i = 0; i < nb_paths; i++) {
1268 snprintf(buf, sizeof(buf), fmt, paths[i], filename);
1269 if (tcc_add_file_internal(s, buf, flags) == 0)
1270 return 0;
1271 }
1272 return -1;
1273 }
1274
1275 /* find and load a dll. Return non zero if not found */
1276 /* XXX: add '-rpath' option support ? */
1277 ST_FUNC int tcc_add_dll(TCCState *s, const char *filename, int flags)
1278 {
1279 return tcc_add_library_internal(s, "%s/%s", filename, flags,
1280 s->library_paths, s->nb_library_paths);
1281 }
1282
1283 ST_FUNC int tcc_add_crt(TCCState *s, const char *filename)
1284 {
1285 if (-1 == tcc_add_library_internal(s, "%s/%s",
1286 filename, 0, s->crt_paths, s->nb_crt_paths))
1287 tcc_error_noabort("file '%s' not found", filename);
1288 return 0;
1289 }
1290
1291 /* the library name is the same as the argument of the '-l' option */
1292 LIBTCCAPI int tcc_add_library(TCCState *s, const char *libraryname)
1293 {
1294 #ifdef TCC_TARGET_PE
1295 const char *libs[] = { "%s/%s.def", "%s/lib%s.def", "%s/%s.dll", "%s/lib%s.dll", "%s/lib%s.a", NULL };
1296 const char **pp = s->static_link ? libs + 4 : libs;
1297 #else
1298 const char *libs[] = { "%s/lib%s.so", "%s/lib%s.a", NULL };
1299 const char **pp = s->static_link ? libs + 1 : libs;
1300 #endif
1301 while (*pp) {
1302 if (0 == tcc_add_library_internal(s, *pp,
1303 libraryname, 0, s->library_paths, s->nb_library_paths))
1304 return 0;
1305 ++pp;
1306 }
1307 return -1;
1308 }
1309
1310 LIBTCCAPI int tcc_add_symbol(TCCState *s, const char *name, const void *val)
1311 {
1312 #ifdef TCC_TARGET_PE
1313 /* On x86_64 'val' might not be reachable with a 32bit offset.
1314 So it is handled here as if it were in a DLL. */
1315 pe_putimport(s, 0, name, (uintptr_t)val);
1316 #else
1317 add_elf_sym(symtab_section, (uintptr_t)val, 0,
1318 ELFW(ST_INFO)(STB_GLOBAL, STT_NOTYPE), 0,
1319 SHN_ABS, name);
1320 #endif
1321 return 0;
1322 }
1323
1324 LIBTCCAPI int tcc_set_output_type(TCCState *s, int output_type)
1325 {
1326 s->output_type = output_type;
1327
1328 if (!s->nostdinc) {
1329 /* default include paths */
1330 /* -isystem paths have already been handled */
1331 tcc_add_sysinclude_path(s, CONFIG_TCC_SYSINCLUDEPATHS);
1332 }
1333
1334 /* if bound checking, then add corresponding sections */
1335 #ifdef CONFIG_TCC_BCHECK
1336 if (s->do_bounds_check) {
1337 /* define symbol */
1338 tcc_define_symbol(s, "__BOUNDS_CHECKING_ON", NULL);
1339 /* create bounds sections */
1340 bounds_section = new_section(s, ".bounds",
1341 SHT_PROGBITS, SHF_ALLOC);
1342 lbounds_section = new_section(s, ".lbounds",
1343 SHT_PROGBITS, SHF_ALLOC);
1344 }
1345 #endif
1346
1347 if (s->char_is_unsigned) {
1348 tcc_define_symbol(s, "__CHAR_UNSIGNED__", NULL);
1349 }
1350
1351 /* add debug sections */
1352 if (s->do_debug) {
1353 /* stab symbols */
1354 stab_section = new_section(s, ".stab", SHT_PROGBITS, 0);
1355 stab_section->sh_entsize = sizeof(Stab_Sym);
1356 stabstr_section = new_section(s, ".stabstr", SHT_STRTAB, 0);
1357 put_elf_str(stabstr_section, "");
1358 stab_section->link = stabstr_section;
1359 /* put first entry */
1360 put_stabs("", 0, 0, 0, 0);
1361 }
1362
1363 tcc_add_library_path(s, CONFIG_TCC_LIBPATHS);
1364 #ifdef TCC_TARGET_PE
1365 # ifdef _WIN32
1366 tcc_add_systemdir(s);
1367 # endif
1368 #else
1369 /* add libc crt1/crti objects */
1370 if ((output_type == TCC_OUTPUT_EXE || output_type == TCC_OUTPUT_DLL) &&
1371 !s->nostdlib) {
1372 if (output_type != TCC_OUTPUT_DLL)
1373 tcc_add_crt(s, "crt1.o");
1374 tcc_add_crt(s, "crti.o");
1375 }
1376 #endif
1377 return 0;
1378 }
1379
1380 LIBTCCAPI void tcc_set_lib_path(TCCState *s, const char *path)
1381 {
1382 tcc_free(s->tcc_lib_path);
1383 s->tcc_lib_path = tcc_strdup(path);
1384 }
1385
1386 #define WD_ALL 0x0001 /* warning is activated when using -Wall */
1387 #define FD_INVERT 0x0002 /* invert value before storing */
1388
1389 typedef struct FlagDef {
1390 uint16_t offset;
1391 uint16_t flags;
1392 const char *name;
1393 } FlagDef;
1394
1395 static const FlagDef warning_defs[] = {
1396 { offsetof(TCCState, warn_unsupported), 0, "unsupported" },
1397 { offsetof(TCCState, warn_write_strings), 0, "write-strings" },
1398 { offsetof(TCCState, warn_error), 0, "error" },
1399 { offsetof(TCCState, warn_implicit_function_declaration), WD_ALL,
1400 "implicit-function-declaration" },
1401 };
1402
1403 ST_FUNC int set_flag(TCCState *s, const FlagDef *flags, int nb_flags,
1404 const char *name, int value)
1405 {
1406 int i;
1407 const FlagDef *p;
1408 const char *r;
1409
1410 r = name;
1411 if (r[0] == 'n' && r[1] == 'o' && r[2] == '-') {
1412 r += 3;
1413 value = !value;
1414 }
1415 for(i = 0, p = flags; i < nb_flags; i++, p++) {
1416 if (!strcmp(r, p->name))
1417 goto found;
1418 }
1419 return -1;
1420 found:
1421 if (p->flags & FD_INVERT)
1422 value = !value;
1423 *(int *)((uint8_t *)s + p->offset) = value;
1424 return 0;
1425 }
1426
1427 /* set/reset a warning */
1428 static int tcc_set_warning(TCCState *s, const char *warning_name, int value)
1429 {
1430 int i;
1431 const FlagDef *p;
1432
1433 if (!strcmp(warning_name, "all")) {
1434 for(i = 0, p = warning_defs; i < countof(warning_defs); i++, p++) {
1435 if (p->flags & WD_ALL)
1436 *(int *)((uint8_t *)s + p->offset) = 1;
1437 }
1438 return 0;
1439 } else {
1440 return set_flag(s, warning_defs, countof(warning_defs),
1441 warning_name, value);
1442 }
1443 }
1444
1445 static const FlagDef flag_defs[] = {
1446 { offsetof(TCCState, char_is_unsigned), 0, "unsigned-char" },
1447 { offsetof(TCCState, char_is_unsigned), FD_INVERT, "signed-char" },
1448 { offsetof(TCCState, nocommon), FD_INVERT, "common" },
1449 { offsetof(TCCState, leading_underscore), 0, "leading-underscore" },
1450 };
1451
1452 /* set/reset a flag */
1453 static int tcc_set_flag(TCCState *s, const char *flag_name, int value)
1454 {
1455 return set_flag(s, flag_defs, countof(flag_defs),
1456 flag_name, value);
1457 }
1458
1459
1460 static int strstart(const char *val, const char **str)
1461 {
1462 const char *p, *q;
1463 p = *str;
1464 q = val;
1465 while (*q) {
1466 if (*p != *q)
1467 return 0;
1468 p++;
1469 q++;
1470 }
1471 *str = p;
1472 return 1;
1473 }
1474
1475 /* Like strstart, but automatically takes into account that ld options can
1476 *
1477 * - start with double or single dash (e.g. '--soname' or '-soname')
1478 * - arguments can be given as separate or after '=' (e.g. '-Wl,-soname,x.so'
1479 * or '-Wl,-soname=x.so')
1480 *
1481 * you provide `val` always in 'option[=]' form (no leading -)
1482 */
1483 static int link_option(const char *str, const char *val, const char **ptr)
1484 {
1485 const char *p, *q;
1486
1487 /* there should be 1 or 2 dashes */
1488 if (*str++ != '-')
1489 return 0;
1490 if (*str == '-')
1491 str++;
1492
1493 /* then str & val should match (potentialy up to '=') */
1494 p = str;
1495 q = val;
1496
1497 while (*q != '\0' && *q != '=') {
1498 if (*p != *q)
1499 return 0;
1500 p++;
1501 q++;
1502 }
1503
1504 /* '=' near eos means ',' or '=' is ok */
1505 if (*q == '=') {
1506 if (*p != ',' && *p != '=')
1507 return 0;
1508 p++;
1509 q++;
1510 }
1511
1512 if (ptr)
1513 *ptr = p;
1514 return 1;
1515 }
1516
1517 static const char *skip_linker_arg(const char **str)
1518 {
1519 const char *s1 = *str;
1520 const char *s2 = strchr(s1, ',');
1521 *str = s2 ? s2++ : (s2 = s1 + strlen(s1));
1522 return s2;
1523 }
1524
1525 static char *copy_linker_arg(const char *p)
1526 {
1527 const char *q = p;
1528 skip_linker_arg(&q);
1529 return pstrncpy(tcc_malloc(q - p + 1), p, q - p);
1530 }
1531
1532 /* set linker options */
1533 static int tcc_set_linker(TCCState *s, const char *option)
1534 {
1535 while (option && *option) {
1536
1537 const char *p = option;
1538 char *end = NULL;
1539 int ignoring = 0;
1540
1541 if (link_option(option, "Bsymbolic", &p)) {
1542 s->symbolic = 1;
1543 } else if (link_option(option, "nostdlib", &p)) {
1544 s->nostdlib = 1;
1545 } else if (link_option(option, "fini=", &p)) {
1546 s->fini_symbol = copy_linker_arg(p);
1547 ignoring = 1;
1548 } else if (link_option(option, "image-base=", &p)
1549 || link_option(option, "Ttext=", &p)) {
1550 s->text_addr = strtoull(p, &end, 16);
1551 s->has_text_addr = 1;
1552 } else if (link_option(option, "init=", &p)) {
1553 s->init_symbol = copy_linker_arg(p);
1554 ignoring = 1;
1555 } else if (link_option(option, "oformat=", &p)) {
1556 #if defined(TCC_TARGET_PE)
1557 if (strstart("pe-", &p)) {
1558 #elif defined(TCC_TARGET_X86_64)
1559 if (strstart("elf64-", &p)) {
1560 #else
1561 if (strstart("elf32-", &p)) {
1562 #endif
1563 s->output_format = TCC_OUTPUT_FORMAT_ELF;
1564 } else if (!strcmp(p, "binary")) {
1565 s->output_format = TCC_OUTPUT_FORMAT_BINARY;
1566 #ifdef TCC_TARGET_COFF
1567 } else if (!strcmp(p, "coff")) {
1568 s->output_format = TCC_OUTPUT_FORMAT_COFF;
1569 #endif
1570 } else
1571 goto err;
1572
1573 } else if (link_option(option, "as-needed", &p)) {
1574 ignoring = 1;
1575 } else if (link_option(option, "O", &p)) {
1576 ignoring = 1;
1577 } else if (link_option(option, "rpath=", &p)) {
1578 s->rpath = copy_linker_arg(p);
1579 } else if (link_option(option, "section-alignment=", &p)) {
1580 s->section_align = strtoul(p, &end, 16);
1581 } else if (link_option(option, "soname=", &p)) {
1582 s->soname = copy_linker_arg(p);
1583 #ifdef TCC_TARGET_PE
1584 } else if (link_option(option, "file-alignment=", &p)) {
1585 s->pe_file_align = strtoul(p, &end, 16);
1586 } else if (link_option(option, "stack=", &p)) {
1587 s->pe_stack_size = strtoul(p, &end, 10);
1588 } else if (link_option(option, "subsystem=", &p)) {
1589 #if defined(TCC_TARGET_I386) || defined(TCC_TARGET_X86_64)
1590 if (!strcmp(p, "native")) {
1591 s->pe_subsystem = 1;
1592 } else if (!strcmp(p, "console")) {
1593 s->pe_subsystem = 3;
1594 } else if (!strcmp(p, "gui")) {
1595 s->pe_subsystem = 2;
1596 } else if (!strcmp(p, "posix")) {
1597 s->pe_subsystem = 7;
1598 } else if (!strcmp(p, "efiapp")) {
1599 s->pe_subsystem = 10;
1600 } else if (!strcmp(p, "efiboot")) {
1601 s->pe_subsystem = 11;
1602 } else if (!strcmp(p, "efiruntime")) {
1603 s->pe_subsystem = 12;
1604 } else if (!strcmp(p, "efirom")) {
1605 s->pe_subsystem = 13;
1606 #elif defined(TCC_TARGET_ARM)
1607 if (!strcmp(p, "wince")) {
1608 s->pe_subsystem = 9;
1609 #endif
1610 } else
1611 goto err;
1612 #endif
1613 } else
1614 goto err;
1615
1616 if (ignoring && s->warn_unsupported) err: {
1617 char buf[100], *e;
1618 pstrcpy(buf, sizeof buf, e = copy_linker_arg(option)), tcc_free(e);
1619 if (ignoring)
1620 tcc_warning("unsupported linker option '%s'", buf);
1621 else
1622 tcc_error("unsupported linker option '%s'", buf);
1623 }
1624 option = skip_linker_arg(&p);
1625 }
1626 return 0;
1627 }
1628
1629 typedef struct TCCOption {
1630 const char *name;
1631 uint16_t index;
1632 uint16_t flags;
1633 } TCCOption;
1634
1635 enum {
1636 TCC_OPTION_HELP,
1637 TCC_OPTION_I,
1638 TCC_OPTION_D,
1639 TCC_OPTION_U,
1640 TCC_OPTION_L,
1641 TCC_OPTION_B,
1642 TCC_OPTION_l,
1643 TCC_OPTION_bench,
1644 TCC_OPTION_bt,
1645 TCC_OPTION_b,
1646 TCC_OPTION_g,
1647 TCC_OPTION_c,
1648 TCC_OPTION_float_abi,
1649 TCC_OPTION_static,
1650 TCC_OPTION_shared,
1651 TCC_OPTION_soname,
1652 TCC_OPTION_o,
1653 TCC_OPTION_r,
1654 TCC_OPTION_s,
1655 TCC_OPTION_Wl,
1656 TCC_OPTION_W,
1657 TCC_OPTION_O,
1658 TCC_OPTION_m,
1659 TCC_OPTION_f,
1660 TCC_OPTION_isystem,
1661 TCC_OPTION_nostdinc,
1662 TCC_OPTION_nostdlib,
1663 TCC_OPTION_print_search_dirs,
1664 TCC_OPTION_rdynamic,
1665 TCC_OPTION_pedantic,
1666 TCC_OPTION_pthread,
1667 TCC_OPTION_run,
1668 TCC_OPTION_v,
1669 TCC_OPTION_w,
1670 TCC_OPTION_pipe,
1671 TCC_OPTION_E,
1672 TCC_OPTION_MD,
1673 TCC_OPTION_MF,
1674 TCC_OPTION_x,
1675 TCC_OPTION_dumpversion,
1676 };
1677
1678 #define TCC_OPTION_HAS_ARG 0x0001
1679 #define TCC_OPTION_NOSEP 0x0002 /* cannot have space before option and arg */
1680
1681 static const TCCOption tcc_options[] = {
1682 { "h", TCC_OPTION_HELP, 0 },
1683 { "-help", TCC_OPTION_HELP, 0 },
1684 { "?", TCC_OPTION_HELP, 0 },
1685 { "I", TCC_OPTION_I, TCC_OPTION_HAS_ARG },
1686 { "D", TCC_OPTION_D, TCC_OPTION_HAS_ARG },
1687 { "U", TCC_OPTION_U, TCC_OPTION_HAS_ARG },
1688 { "L", TCC_OPTION_L, TCC_OPTION_HAS_ARG },
1689 { "B", TCC_OPTION_B, TCC_OPTION_HAS_ARG },
1690 { "l", TCC_OPTION_l, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1691 { "bench", TCC_OPTION_bench, 0 },
1692 #ifdef CONFIG_TCC_BACKTRACE
1693 { "bt", TCC_OPTION_bt, TCC_OPTION_HAS_ARG },
1694 #endif
1695 #ifdef CONFIG_TCC_BCHECK
1696 { "b", TCC_OPTION_b, 0 },
1697 #endif
1698 { "g", TCC_OPTION_g, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1699 { "c", TCC_OPTION_c, 0 },
1700 #ifdef TCC_TARGET_ARM
1701 { "mfloat-abi", TCC_OPTION_float_abi, TCC_OPTION_HAS_ARG },
1702 #endif
1703 { "static", TCC_OPTION_static, 0 },
1704 { "shared", TCC_OPTION_shared, 0 },
1705 { "soname", TCC_OPTION_soname, TCC_OPTION_HAS_ARG },
1706 { "o", TCC_OPTION_o, TCC_OPTION_HAS_ARG },
1707 { "pedantic", TCC_OPTION_pedantic, 0},
1708 { "pthread", TCC_OPTION_pthread, 0},
1709 { "run", TCC_OPTION_run, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1710 { "rdynamic", TCC_OPTION_rdynamic, 0 },
1711 { "r", TCC_OPTION_r, 0 },
1712 { "s", TCC_OPTION_s, 0 },
1713 { "Wl,", TCC_OPTION_Wl, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1714 { "W", TCC_OPTION_W, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1715 { "O", TCC_OPTION_O, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1716 { "m", TCC_OPTION_m, TCC_OPTION_HAS_ARG },
1717 { "f", TCC_OPTION_f, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1718 { "isystem", TCC_OPTION_isystem, TCC_OPTION_HAS_ARG },
1719 { "nostdinc", TCC_OPTION_nostdinc, 0 },
1720 { "nostdlib", TCC_OPTION_nostdlib, 0 },
1721 { "print-search-dirs", TCC_OPTION_print_search_dirs, 0 },
1722 { "v", TCC_OPTION_v, TCC_OPTION_HAS_ARG | TCC_OPTION_NOSEP },
1723 { "w", TCC_OPTION_w, 0 },
1724 { "pipe", TCC_OPTION_pipe, 0},
1725 { "E", TCC_OPTION_E, 0},
1726 { "MD", TCC_OPTION_MD, 0},
1727 { "MF", TCC_OPTION_MF, TCC_OPTION_HAS_ARG },
1728 { "x", TCC_OPTION_x, TCC_OPTION_HAS_ARG },
1729 { "dumpversion", TCC_OPTION_dumpversion, 0},
1730 { NULL, 0, 0 },
1731 };
1732
1733 static void parse_option_D(TCCState *s1, const char *optarg)
1734 {
1735 char *sym = tcc_strdup(optarg);
1736 char *value = strchr(sym, '=');
1737 if (value)
1738 *value++ = '\0';
1739 tcc_define_symbol(s1, sym, value);
1740 tcc_free(sym);
1741 }
1742
1743 PUB_FUNC int tcc_parse_args(TCCState *s, int argc, char **argv)
1744 {
1745 const TCCOption *popt;
1746 const char *optarg, *r;
1747 int run = 0;
1748 int pthread = 0;
1749 int optind = 0;
1750
1751 /* collect -Wl options for input such as "-Wl,-rpath -Wl,<path>" */
1752 CString linker_arg;
1753 cstr_new(&linker_arg);
1754
1755 while (optind < argc) {
1756
1757 r = argv[optind++];
1758 if (r[0] != '-' || r[1] == '\0') {
1759 /* add a new file */
1760 dynarray_add((void ***)&s->files, &s->nb_files, tcc_strdup(r));
1761 if (run) {
1762 optind--;
1763 /* argv[0] will be this file */
1764 break;
1765 }
1766 continue;
1767 }
1768
1769 /* find option in table */
1770 for(popt = tcc_options; ; ++popt) {
1771 const char *p1 = popt->name;
1772 const char *r1 = r + 1;
1773 if (p1 == NULL)
1774 tcc_error("invalid option -- '%s'", r);
1775 if (!strstart(p1, &r1))
1776 continue;
1777 optarg = r1;
1778 if (popt->flags & TCC_OPTION_HAS_ARG) {
1779 if (*r1 == '\0' && !(popt->flags & TCC_OPTION_NOSEP)) {
1780 if (optind >= argc)
1781 tcc_error("argument to '%s' is missing", r);
1782 optarg = argv[optind++];
1783 }
1784 } else if (*r1 != '\0')
1785 continue;
1786 break;
1787 }
1788
1789 switch(popt->index) {
1790 case TCC_OPTION_HELP:
1791 return 0;
1792 case TCC_OPTION_I:
1793 if (tcc_add_include_path(s, optarg) < 0)
1794 tcc_error("too many include paths");
1795 break;
1796 case TCC_OPTION_D:
1797 parse_option_D(s, optarg);
1798 break;
1799 case TCC_OPTION_U:
1800 tcc_undefine_symbol(s, optarg);
1801 break;
1802 case TCC_OPTION_L:
1803 tcc_add_library_path(s, optarg);
1804 break;
1805 case TCC_OPTION_B:
1806 /* set tcc utilities path (mainly for tcc development) */
1807 tcc_set_lib_path(s, optarg);
1808 break;
1809 case TCC_OPTION_l:
1810 dynarray_add((void ***)&s->files, &s->nb_files, tcc_strdup(r));
1811 s->nb_libraries++;
1812 break;
1813 case TCC_OPTION_pthread:
1814 parse_option_D(s, "_REENTRANT");
1815 pthread = 1;
1816 break;
1817 case TCC_OPTION_bench:
1818 s->do_bench = 1;
1819 break;
1820 #ifdef CONFIG_TCC_BACKTRACE
1821 case TCC_OPTION_bt:
1822 tcc_set_num_callers(atoi(optarg));
1823 break;
1824 #endif
1825 #ifdef CONFIG_TCC_BCHECK
1826 case TCC_OPTION_b:
1827 s->do_bounds_check = 1;
1828 s->do_debug = 1;
1829 break;
1830 #endif
1831 case TCC_OPTION_g:
1832 s->do_debug = 1;
1833 break;
1834 case TCC_OPTION_c:
1835 s->output_type = TCC_OUTPUT_OBJ;
1836 break;
1837 #ifdef TCC_TARGET_ARM
1838 case TCC_OPTION_float_abi:
1839 /* tcc doesn't support soft float yet */
1840 if (!strcmp(optarg, "softfp")) {
1841 s->float_abi = ARM_SOFTFP_FLOAT;
1842 tcc_undefine_symbol(s, "__ARM_PCS_VFP");
1843 } else if (!strcmp(optarg, "hard"))
1844 s->float_abi = ARM_HARD_FLOAT;
1845 else
1846 tcc_error("unsupported float abi '%s'", optarg);
1847 break;
1848 #endif
1849 case TCC_OPTION_static:
1850 s->static_link = 1;
1851 break;
1852 case TCC_OPTION_shared:
1853 s->output_type = TCC_OUTPUT_DLL;
1854 break;
1855 case TCC_OPTION_soname:
1856 s->soname = tcc_strdup(optarg);
1857 break;
1858 case TCC_OPTION_m:
1859 s->option_m = tcc_strdup(optarg);
1860 break;
1861 case TCC_OPTION_o:
1862 s->outfile = tcc_strdup(optarg);
1863 break;
1864 case TCC_OPTION_r:
1865 /* generate a .o merging several output files */
1866 s->option_r = 1;
1867 s->output_type = TCC_OUTPUT_OBJ;
1868 break;
1869 case TCC_OPTION_isystem:
1870 tcc_add_sysinclude_path(s, optarg);
1871 break;
1872 case TCC_OPTION_nostdinc:
1873 s->nostdinc = 1;
1874 break;
1875 case TCC_OPTION_nostdlib:
1876 s->nostdlib = 1;
1877 break;
1878 case TCC_OPTION_print_search_dirs:
1879 s->print_search_dirs = 1;
1880 break;
1881 case TCC_OPTION_run:
1882 s->output_type = TCC_OUTPUT_MEMORY;
1883 tcc_set_options(s, optarg);
1884 run = 1;
1885 break;
1886 case TCC_OPTION_v:
1887 do ++s->verbose; while (*optarg++ == 'v');
1888 break;
1889 case TCC_OPTION_f:
1890 if (tcc_set_flag(s, optarg, 1) < 0 && s->warn_unsupported)
1891 goto unsupported_option;
1892 break;
1893 case TCC_OPTION_W:
1894 if (tcc_set_warning(s, optarg, 1) < 0 &&
1895 s->warn_unsupported)
1896 goto unsupported_option;
1897 break;
1898 case TCC_OPTION_w:
1899 s->warn_none = 1;
1900 break;
1901 case TCC_OPTION_rdynamic:
1902 s->rdynamic = 1;
1903 break;
1904 case TCC_OPTION_Wl:
1905 if (linker_arg.size)
1906 --linker_arg.size, cstr_ccat(&linker_arg, ',');
1907 cstr_cat(&linker_arg, optarg);
1908 cstr_ccat(&linker_arg, '\0');
1909 break;
1910 case TCC_OPTION_E:
1911 s->output_type = TCC_OUTPUT_PREPROCESS;
1912 break;
1913 case TCC_OPTION_MD:
1914 s->gen_deps = 1;
1915 break;
1916 case TCC_OPTION_MF:
1917 s->deps_outfile = tcc_strdup(optarg);
1918 break;
1919 case TCC_OPTION_dumpversion:
1920 printf ("%s\n", TCC_VERSION);
1921 exit(0);
1922 case TCC_OPTION_O:
1923 case TCC_OPTION_pedantic:
1924 case TCC_OPTION_pipe:
1925 case TCC_OPTION_s:
1926 case TCC_OPTION_x:
1927 /* ignored */
1928 break;
1929 default:
1930 if (s->warn_unsupported) {
1931 unsupported_option:
1932 tcc_warning("unsupported option '%s'", r);
1933 }
1934 break;
1935 }
1936 }
1937
1938 if (pthread && s->output_type != TCC_OUTPUT_OBJ)
1939 tcc_set_options(s, "-lpthread");
1940
1941 tcc_set_linker(s, (const char *)linker_arg.data);
1942 cstr_free(&linker_arg);
1943
1944 return optind;
1945 }
1946
1947 LIBTCCAPI int tcc_set_options(TCCState *s, const char *str)
1948 {
1949 const char *s1;
1950 char **argv, *arg;
1951 int argc, len;
1952 int ret;
1953
1954 argc = 0, argv = NULL;
1955 for(;;) {
1956 while (is_space(*str))
1957 str++;
1958 if (*str == '\0')
1959 break;
1960 s1 = str;
1961 while (*str != '\0' && !is_space(*str))
1962 str++;
1963 len = str - s1;
1964 arg = tcc_malloc(len + 1);
1965 pstrncpy(arg, s1, len);
1966 dynarray_add((void ***)&argv, &argc, arg);
1967 }
1968 ret = tcc_parse_args(s, argc, argv);
1969 dynarray_reset(&argv, &argc);
1970 return ret;
1971 }
1972
1973 PUB_FUNC void tcc_print_stats(TCCState *s, int64_t total_time)
1974 {
1975 double tt;
1976 tt = (double)total_time / 1000000.0;
1977 if (tt < 0.001)
1978 tt = 0.001;
1979 if (total_bytes < 1)
1980 total_bytes = 1;
1981 printf("%d idents, %d lines, %d bytes, %0.3f s, %d lines/s, %0.1f MB/s\n",
1982 tok_ident - TOK_IDENT, total_lines, total_bytes,
1983 tt, (int)(total_lines / tt),
1984 total_bytes / tt / 1000000.0);
1985 }
1986
1987 PUB_FUNC void tcc_set_environment(TCCState *s)
1988 {
1989 char * path;
1990
1991 path = getenv("C_INCLUDE_PATH");
1992 if(path != NULL) {
1993 tcc_add_include_path(s, path);
1994 }
1995 path = getenv("CPATH");
1996 if(path != NULL) {
1997 tcc_add_include_path(s, path);
1998 }
1999 path = getenv("LIBRARY_PATH");
2000 if(path != NULL) {
2001 tcc_add_library_path(s, path);
2002 }
2003 }