?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Relicensing TinyCC
[tinycc.git] / tccdbg.c
blob2509baceabfd3fc4536f541475221118aab32477
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 /* stab debug support */
24
25 static const struct {
26 int type;
27 int size;
28 int encoding;
29 const char *name;
30 } default_debug[] = {
31 { VT_INT, 4, DW_ATE_signed, "int:t1=r1;-2147483648;2147483647;" },
32 { VT_BYTE, 1, DW_ATE_signed_char, "char:t2=r2;0;127;" },
33 #if LONG_SIZE == 4
34 { VT_LONG | VT_INT, 4, DW_ATE_signed, "long int:t3=r3;-2147483648;2147483647;" },
35 #else
36 { VT_LLONG | VT_LONG, 8, DW_ATE_signed, "long int:t3=r3;-9223372036854775808;9223372036854775807;" },
37 #endif
38 { VT_INT | VT_UNSIGNED, 4, DW_ATE_unsigned, "unsigned int:t4=r4;0;037777777777;" },
39 #if LONG_SIZE == 4
40 { VT_LONG | VT_INT | VT_UNSIGNED, 4, DW_ATE_unsigned, "long unsigned int:t5=r5;0;037777777777;" },
41 #else
42 /* use octal instead of -1 so size_t works (-gstabs+ in gcc) */
43 { VT_LLONG | VT_LONG | VT_UNSIGNED, 8, DW_ATE_unsigned, "long unsigned int:t5=r5;0;01777777777777777777777;" },
44 #endif
45 { VT_QLONG, 16, DW_ATE_signed, "__int128:t6=r6;0;-1;" },
46 { VT_QLONG | VT_UNSIGNED, 16, DW_ATE_unsigned, "__int128 unsigned:t7=r7;0;-1;" },
47 { VT_LLONG, 8, DW_ATE_signed, "long long int:t8=r8;-9223372036854775808;9223372036854775807;" },
48 { VT_LLONG | VT_UNSIGNED, 8, DW_ATE_unsigned, "long long unsigned int:t9=r9;0;01777777777777777777777;" },
49 { VT_SHORT, 2, DW_ATE_signed, "short int:t10=r10;-32768;32767;" },
50 { VT_SHORT | VT_UNSIGNED, 2, DW_ATE_unsigned, "short unsigned int:t11=r11;0;65535;" },
51 { VT_BYTE | VT_DEFSIGN, 1, DW_ATE_signed_char, "signed char:t12=r12;-128;127;" },
52 { VT_BYTE | VT_DEFSIGN | VT_UNSIGNED, 1, DW_ATE_unsigned_char, "unsigned char:t13=r13;0;255;" },
53 { VT_FLOAT, 4, DW_ATE_float, "float:t14=r1;4;0;" },
54 { VT_DOUBLE, 8, DW_ATE_float, "double:t15=r1;8;0;" },
55 #ifdef TCC_USING_DOUBLE_FOR_LDOUBLE
56 { VT_DOUBLE | VT_LONG, 8, DW_ATE_float, "long double:t16=r1;8;0;" },
57 #else
58 { VT_LDOUBLE, 16, DW_ATE_float, "long double:t16=r1;16;0;" },
59 #endif
60 { -1, -1, -1, "_Float32:t17=r1;4;0;" },
61 { -1, -1, -1, "_Float64:t18=r1;8;0;" },
62 { -1, -1, -1, "_Float128:t19=r1;16;0;" },
63 { -1, -1, -1, "_Float32x:t20=r1;8;0;" },
64 { -1, -1, -1, "_Float64x:t21=r1;16;0;" },
65 { -1, -1, -1, "_Decimal32:t22=r1;4;0;" },
66 { -1, -1, -1, "_Decimal64:t23=r1;8;0;" },
67 { -1, -1, -1, "_Decimal128:t24=r1;16;0;" },
68 /* if default char is unsigned */
69 { VT_BYTE | VT_UNSIGNED, 1, DW_ATE_unsigned_char, "unsigned char:t25=r25;0;255;" },
70 /* boolean type */
71 { VT_BOOL, 1, DW_ATE_boolean, "bool:t26=r26;0;255;" },
72 #if LONG_SIZE == 4
73 { VT_VOID, 1, DW_ATE_unsigned_char, "void:t27=27" },
74 #else
75 /* bitfields use these */
76 { VT_LONG | VT_INT, 8, DW_ATE_signed, "long int:t27=r27;-9223372036854775808;9223372036854775807;" },
77 { VT_LONG | VT_INT | VT_UNSIGNED, 8, DW_ATE_unsigned, "long unsigned int:t28=r28;0;01777777777777777777777;" },
78 { VT_VOID, 1, DW_ATE_unsigned_char, "void:t29=29" },
79 #endif
80 };
81
82 #define N_DEFAULT_DEBUG (sizeof (default_debug) / sizeof (default_debug[0]))
83
84 /* dwarf debug */
85
86 #define DWARF_LINE_BASE -5
87 #define DWARF_LINE_RANGE 14
88 #define DWARF_OPCODE_BASE 13
89
90 #if defined TCC_TARGET_ARM64
91 #define DWARF_MIN_INSTR_LEN 4
92 #elif defined TCC_TARGET_ARM
93 #define DWARF_MIN_INSTR_LEN 2
94 #else
95 #define DWARF_MIN_INSTR_LEN 1
96 #endif
97
98 #define DWARF_ABBREV_COMPILE_UNIT 1
99 #define DWARF_ABBREV_BASE_TYPE 2
100 #define DWARF_ABBREV_VARIABLE_EXTERNAL 3
101 #define DWARF_ABBREV_VARIABLE_STATIC 4
102 #define DWARF_ABBREV_VARIABLE_LOCAL 5
103 #define DWARF_ABBREV_FORMAL_PARAMETER 6
104 #define DWARF_ABBREV_POINTER 7
105 #define DWARF_ABBREV_ARRAY_TYPE 8
106 #define DWARF_ABBREV_SUBRANGE_TYPE 9
107 #define DWARF_ABBREV_TYPEDEF 10
108 #define DWARF_ABBREV_ENUMERATOR_SIGNED 11
109 #define DWARF_ABBREV_ENUMERATOR_UNSIGNED 12
110 #define DWARF_ABBREV_ENUMERATION_TYPE 13
111 #define DWARF_ABBREV_MEMBER 14
112 #define DWARF_ABBREV_MEMBER_BF 15
113 #define DWARF_ABBREV_STRUCTURE_TYPE 16
114 #define DWARF_ABBREV_STRUCTURE_EMPTY_TYPE 17
115 #define DWARF_ABBREV_UNION_TYPE 18
116 #define DWARF_ABBREV_UNION_EMPTY_TYPE 19
117 #define DWARF_ABBREV_SUBPROGRAM_EXTERNAL 20
118 #define DWARF_ABBREV_SUBPROGRAM_STATIC 21
119 #define DWARF_ABBREV_LEXICAL_BLOCK 22
120 #define DWARF_ABBREV_LEXICAL_EMPTY_BLOCK 23
121 #define DWARF_ABBREV_SUBROUTINE_TYPE 24
122 #define DWARF_ABBREV_SUBROUTINE_EMPTY_TYPE 25
123 #define DWARF_ABBREV_FORMAL_PARAMETER2 26
124
125 /* all entries should have been generated with dwarf_uleb128 except
126 has_children. All values are currently below 128 so this currently
127 works. */
128 static const unsigned char dwarf_abbrev_init[] = {
129 DWARF_ABBREV_COMPILE_UNIT, DW_TAG_compile_unit, 1,
130 DW_AT_producer, DW_FORM_strp,
131 DW_AT_language, DW_FORM_data1,
132 DW_AT_name, DW_FORM_line_strp,
133 DW_AT_comp_dir, DW_FORM_line_strp,
134 DW_AT_low_pc, DW_FORM_addr,
135 #if PTR_SIZE == 4
136 DW_AT_high_pc, DW_FORM_data4,
137 #else
138 DW_AT_high_pc, DW_FORM_data8,
139 #endif
140 DW_AT_stmt_list, DW_FORM_sec_offset,
141 0, 0,
142 DWARF_ABBREV_BASE_TYPE, DW_TAG_base_type, 0,
143 DW_AT_byte_size, DW_FORM_udata,
144 DW_AT_encoding, DW_FORM_data1,
145 DW_AT_name, DW_FORM_strp,
146 0, 0,
147 DWARF_ABBREV_VARIABLE_EXTERNAL, DW_TAG_variable, 0,
148 DW_AT_name, DW_FORM_strp,
149 DW_AT_decl_file, DW_FORM_udata,
150 DW_AT_decl_line, DW_FORM_udata,
151 DW_AT_type, DW_FORM_ref4,
152 DW_AT_external, DW_FORM_flag,
153 DW_AT_location, DW_FORM_exprloc,
154 0, 0,
155 DWARF_ABBREV_VARIABLE_STATIC, DW_TAG_variable, 0,
156 DW_AT_name, DW_FORM_strp,
157 DW_AT_decl_file, DW_FORM_udata,
158 DW_AT_decl_line, DW_FORM_udata,
159 DW_AT_type, DW_FORM_ref4,
160 DW_AT_location, DW_FORM_exprloc,
161 0, 0,
162 DWARF_ABBREV_VARIABLE_LOCAL, DW_TAG_variable, 0,
163 DW_AT_name, DW_FORM_strp,
164 DW_AT_type, DW_FORM_ref4,
165 DW_AT_location, DW_FORM_exprloc,
166 0, 0,
167 DWARF_ABBREV_FORMAL_PARAMETER, DW_TAG_formal_parameter, 0,
168 DW_AT_name, DW_FORM_strp,
169 DW_AT_type, DW_FORM_ref4,
170 DW_AT_location, DW_FORM_exprloc,
171 0, 0,
172 DWARF_ABBREV_POINTER, DW_TAG_pointer_type, 0,
173 DW_AT_byte_size, DW_FORM_data1,
174 DW_AT_type, DW_FORM_ref4,
175 0, 0,
176 DWARF_ABBREV_ARRAY_TYPE, DW_TAG_array_type, 1,
177 DW_AT_type, DW_FORM_ref4,
178 DW_AT_sibling, DW_FORM_ref4,
179 0, 0,
180 DWARF_ABBREV_SUBRANGE_TYPE, DW_TAG_subrange_type, 0,
181 DW_AT_type, DW_FORM_ref4,
182 DW_AT_upper_bound, DW_FORM_udata,
183 0, 0,
184 DWARF_ABBREV_TYPEDEF, DW_TAG_typedef, 0,
185 DW_AT_name, DW_FORM_strp,
186 DW_AT_decl_file, DW_FORM_udata,
187 DW_AT_decl_line, DW_FORM_udata,
188 DW_AT_type, DW_FORM_ref4,
189 0, 0,
190 DWARF_ABBREV_ENUMERATOR_SIGNED, DW_TAG_enumerator, 0,
191 DW_AT_name, DW_FORM_strp,
192 DW_AT_const_value, DW_FORM_sdata,
193 0, 0,
194 DWARF_ABBREV_ENUMERATOR_UNSIGNED, DW_TAG_enumerator, 0,
195 DW_AT_name, DW_FORM_strp,
196 DW_AT_const_value, DW_FORM_udata,
197 0, 0,
198 DWARF_ABBREV_ENUMERATION_TYPE, DW_TAG_enumeration_type, 1,
199 DW_AT_name, DW_FORM_strp,
200 DW_AT_encoding, DW_FORM_data1,
201 DW_AT_byte_size, DW_FORM_data1,
202 DW_AT_type, DW_FORM_ref4,
203 DW_AT_decl_file, DW_FORM_udata,
204 DW_AT_decl_line, DW_FORM_udata,
205 DW_AT_sibling, DW_FORM_ref4,
206 0, 0,
207 DWARF_ABBREV_MEMBER, DW_TAG_member, 0,
208 DW_AT_name, DW_FORM_strp,
209 DW_AT_decl_file, DW_FORM_udata,
210 DW_AT_decl_line, DW_FORM_udata,
211 DW_AT_type, DW_FORM_ref4,
212 DW_AT_data_member_location, DW_FORM_udata,
213 0, 0,
214 DWARF_ABBREV_MEMBER_BF, DW_TAG_member, 0,
215 DW_AT_name, DW_FORM_strp,
216 DW_AT_decl_file, DW_FORM_udata,
217 DW_AT_decl_line, DW_FORM_udata,
218 DW_AT_type, DW_FORM_ref4,
219 DW_AT_bit_size, DW_FORM_udata,
220 DW_AT_data_bit_offset, DW_FORM_udata,
221 0, 0,
222 DWARF_ABBREV_STRUCTURE_TYPE, DW_TAG_structure_type, 1,
223 DW_AT_name, DW_FORM_strp,
224 DW_AT_byte_size, DW_FORM_udata,
225 DW_AT_decl_file, DW_FORM_udata,
226 DW_AT_decl_line, DW_FORM_udata,
227 DW_AT_sibling, DW_FORM_ref4,
228 0, 0,
229 DWARF_ABBREV_STRUCTURE_EMPTY_TYPE, DW_TAG_structure_type, 0,
230 DW_AT_name, DW_FORM_strp,
231 DW_AT_byte_size, DW_FORM_udata,
232 DW_AT_decl_file, DW_FORM_udata,
233 DW_AT_decl_line, DW_FORM_udata,
234 0, 0,
235 DWARF_ABBREV_UNION_TYPE, DW_TAG_union_type, 1,
236 DW_AT_name, DW_FORM_strp,
237 DW_AT_byte_size, DW_FORM_udata,
238 DW_AT_decl_file, DW_FORM_udata,
239 DW_AT_decl_line, DW_FORM_udata,
240 DW_AT_sibling, DW_FORM_ref4,
241 0, 0,
242 DWARF_ABBREV_UNION_EMPTY_TYPE, DW_TAG_union_type, 0,
243 DW_AT_name, DW_FORM_strp,
244 DW_AT_byte_size, DW_FORM_udata,
245 DW_AT_decl_file, DW_FORM_udata,
246 DW_AT_decl_line, DW_FORM_udata,
247 0, 0,
248 DWARF_ABBREV_SUBPROGRAM_EXTERNAL, DW_TAG_subprogram, 1,
249 DW_AT_external, DW_FORM_flag,
250 DW_AT_name, DW_FORM_strp,
251 DW_AT_decl_file, DW_FORM_udata,
252 DW_AT_decl_line, DW_FORM_udata,
253 DW_AT_type, DW_FORM_ref4,
254 DW_AT_low_pc, DW_FORM_addr,
255 #if PTR_SIZE == 4
256 DW_AT_high_pc, DW_FORM_data4,
257 #else
258 DW_AT_high_pc, DW_FORM_data8,
259 #endif
260 DW_AT_sibling, DW_FORM_ref4,
261 DW_AT_frame_base, DW_FORM_exprloc,
262 0, 0,
263 DWARF_ABBREV_SUBPROGRAM_STATIC, DW_TAG_subprogram, 1,
264 DW_AT_name, DW_FORM_strp,
265 DW_AT_decl_file, DW_FORM_udata,
266 DW_AT_decl_line, DW_FORM_udata,
267 DW_AT_type, DW_FORM_ref4,
268 DW_AT_low_pc, DW_FORM_addr,
269 #if PTR_SIZE == 4
270 DW_AT_high_pc, DW_FORM_data4,
271 #else
272 DW_AT_high_pc, DW_FORM_data8,
273 #endif
274 DW_AT_sibling, DW_FORM_ref4,
275 DW_AT_frame_base, DW_FORM_exprloc,
276 0, 0,
277 DWARF_ABBREV_LEXICAL_BLOCK, DW_TAG_lexical_block, 1,
278 DW_AT_low_pc, DW_FORM_addr,
279 #if PTR_SIZE == 4
280 DW_AT_high_pc, DW_FORM_data4,
281 #else
282 DW_AT_high_pc, DW_FORM_data8,
283 #endif
284 0, 0,
285 DWARF_ABBREV_LEXICAL_EMPTY_BLOCK, DW_TAG_lexical_block, 0,
286 DW_AT_low_pc, DW_FORM_addr,
287 #if PTR_SIZE == 4
288 DW_AT_high_pc, DW_FORM_data4,
289 #else
290 DW_AT_high_pc, DW_FORM_data8,
291 #endif
292 0, 0,
293 DWARF_ABBREV_SUBROUTINE_TYPE, DW_TAG_subroutine_type, 1,
294 DW_AT_type, DW_FORM_ref4,
295 DW_AT_sibling, DW_FORM_ref4,
296 0, 0,
297 DWARF_ABBREV_SUBROUTINE_EMPTY_TYPE, DW_TAG_subroutine_type, 0,
298 DW_AT_type, DW_FORM_ref4,
299 0, 0,
300 DWARF_ABBREV_FORMAL_PARAMETER2, DW_TAG_formal_parameter, 0,
301 DW_AT_type, DW_FORM_ref4,
302 0, 0,
303 0
304 };
305
306 static const unsigned char dwarf_line_opcodes[] = {
307 0 ,1 ,1 ,1 ,1 ,0 ,0 ,0 ,1 ,0 ,0 ,1
308 };
309
310 /* ------------------------------------------------------------------------- */
311 /* debug state */
312
313 struct _tccdbg {
314
315 int last_line_num, new_file;
316 int section_sym;
317
318 int debug_next_type;
319
320 struct _debug_hash {
321 int debug_type;
322 Sym *type;
323 } *debug_hash;
324
325 struct _debug_anon_hash {
326 Sym *type;
327 int n_debug_type;
328 int *debug_type;
329 } *debug_anon_hash;
330
331 int n_debug_hash;
332 int n_debug_anon_hash;
333
334 struct _debug_info {
335 int start;
336 int end;
337 int n_sym;
338 struct debug_sym {
339 int type;
340 unsigned long value;
341 char *str;
342 Section *sec;
343 int sym_index;
344 int info;
345 int file;
346 int line;
347 } *sym;
348 struct _debug_info *child, *next, *last, *parent;
349 } *debug_info, *debug_info_root;
350
351 struct {
352 int info;
353 int abbrev;
354 int line;
355 int str;
356 int line_str;
357 } dwarf_sym;
358
359 struct {
360 int start;
361 int dir_size;
362 char **dir_table;
363 int filename_size;
364 struct dwarf_filename_struct {
365 int dir_entry;
366 char *name;
367 } *filename_table;
368 int line_size;
369 int line_max_size;
370 unsigned char *line_data;
371 int cur_file;
372 int last_file;
373 int last_pc;
374 int last_line;
375 } dwarf_line;
376
377 struct {
378 int start;
379 Sym *func;
380 int line;
381 int base_type_used[N_DEFAULT_DEBUG];
382 } dwarf_info;
383
384 /* test coverage */
385 struct {
386 unsigned long offset;
387 unsigned long last_file_name;
388 unsigned long last_func_name;
389 int ind;
390 int line;
391 } tcov_data;
392
393 };
394
395 #define last_line_num s1->dState->last_line_num
396 #define new_file s1->dState->new_file
397 #define section_sym s1->dState->section_sym
398 #define debug_next_type s1->dState->debug_next_type
399 #define debug_hash s1->dState->debug_hash
400 #define debug_anon_hash s1->dState->debug_anon_hash
401 #define n_debug_hash s1->dState->n_debug_hash
402 #define n_debug_anon_hash s1->dState->n_debug_anon_hash
403 #define debug_info s1->dState->debug_info
404 #define debug_info_root s1->dState->debug_info_root
405 #define dwarf_sym s1->dState->dwarf_sym
406 #define dwarf_line s1->dState->dwarf_line
407 #define dwarf_info s1->dState->dwarf_info
408 #define tcov_data s1->dState->tcov_data
409
410 /* ------------------------------------------------------------------------- */
411 static void put_stabs(TCCState *s1, const char *str, int type, int other,
412 int desc, unsigned long value);
413
414 ST_FUNC void tcc_debug_new(TCCState *s1)
415 {
416 int shf = 0;
417 if (!s1->dState)
418 s1->dState = tcc_mallocz(sizeof *s1->dState);
419 #ifdef CONFIG_TCC_BACKTRACE
420 /* include stab info with standalone backtrace support */
421 if (s1->do_backtrace
422 && (s1->output_type & (TCC_OUTPUT_EXE | TCC_OUTPUT_DLL)))
423 shf = SHF_ALLOC | SHF_WRITE; // SHF_WRITE needed for musl/SELINUX
424 #endif
425 if (s1->dwarf) {
426 s1->dwlo = s1->nb_sections;
427 dwarf_info_section =
428 new_section(s1, ".debug_info", SHT_PROGBITS, shf);
429 dwarf_abbrev_section =
430 new_section(s1, ".debug_abbrev", SHT_PROGBITS, shf);
431 dwarf_line_section =
432 new_section(s1, ".debug_line", SHT_PROGBITS, shf);
433 dwarf_aranges_section =
434 new_section(s1, ".debug_aranges", SHT_PROGBITS, shf);
435 shf |= SHF_MERGE | SHF_STRINGS;
436 dwarf_str_section =
437 new_section(s1, ".debug_str", SHT_PROGBITS, shf);
438 dwarf_str_section->sh_entsize = 1;
439 dwarf_info_section->sh_addralign =
440 dwarf_abbrev_section->sh_addralign =
441 dwarf_line_section->sh_addralign =
442 dwarf_aranges_section->sh_addralign =
443 dwarf_str_section->sh_addralign = 1;
444 if (s1->dwarf >= 5) {
445 dwarf_line_str_section =
446 new_section(s1, ".debug_line_str", SHT_PROGBITS, shf);
447 dwarf_line_str_section->sh_entsize = 1;
448 dwarf_line_str_section->sh_addralign = 1;
449 }
450 s1->dwhi = s1->nb_sections;
451 }
452 else
453 {
454 stab_section = new_section(s1, ".stab", SHT_PROGBITS, shf);
455 stab_section->sh_entsize = sizeof(Stab_Sym);
456 stab_section->sh_addralign = sizeof ((Stab_Sym*)0)->n_value;
457 stab_section->link = new_section(s1, ".stabstr", SHT_STRTAB, shf);
458 /* put first entry */
459 put_stabs(s1, "", 0, 0, 0, 0);
460 }
461 }
462
463 /* put stab debug information */
464 static void put_stabs(TCCState *s1, const char *str, int type, int other, int desc,
465 unsigned long value)
466 {
467 Stab_Sym *sym;
468
469 unsigned offset;
470 if (type == N_SLINE
471 && (offset = stab_section->data_offset)
472 && (sym = (Stab_Sym*)(stab_section->data + offset) - 1)
473 && sym->n_type == type
474 && sym->n_value == value) {
475 /* just update line_number in previous entry */
476 sym->n_desc = desc;
477 return;
478 }
479
480 sym = section_ptr_add(stab_section, sizeof(Stab_Sym));
481 if (str) {
482 sym->n_strx = put_elf_str(stab_section->link, str);
483 } else {
484 sym->n_strx = 0;
485 }
486 sym->n_type = type;
487 sym->n_other = other;
488 sym->n_desc = desc;
489 sym->n_value = value;
490 }
491
492 static void put_stabs_r(TCCState *s1, const char *str, int type, int other, int desc,
493 unsigned long value, Section *sec, int sym_index)
494 {
495 put_elf_reloc(symtab_section, stab_section,
496 stab_section->data_offset + 8,
497 sizeof ((Stab_Sym*)0)->n_value == PTR_SIZE ? R_DATA_PTR : R_DATA_32,
498 sym_index);
499 put_stabs(s1, str, type, other, desc, value);
500 }
501
502 static void put_stabn(TCCState *s1, int type, int other, int desc, int value)
503 {
504 put_stabs(s1, NULL, type, other, desc, value);
505 }
506
507 /* ------------------------------------------------------------------------- */
508 #define dwarf_data1(s,data) \
509 { unsigned char *p = section_ptr_add((s), 1); *p = (data); }
510 #define dwarf_data2(s,data) \
511 write16le(section_ptr_add((s), 2), (data))
512 #define dwarf_data4(s,data) \
513 write32le(section_ptr_add((s), 4), (data))
514 #define dwarf_data8(s,data) \
515 write64le(section_ptr_add((s), 8), (data))
516
517 static int dwarf_get_section_sym(Section *s)
518 {
519 TCCState *s1 = s->s1;
520 return put_elf_sym(symtab_section, 0, 0,
521 ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
522 s->sh_num, NULL);
523 }
524
525 static void dwarf_reloc(Section *s, int sym, int rel)
526 {
527 TCCState *s1 = s->s1;
528 put_elf_reloca(symtab_section, s, s->data_offset, rel, sym, 0);
529 }
530
531 static void dwarf_string(Section *s, Section *dw, int sym, const char *str)
532 {
533 TCCState *s1 = s->s1;
534 int offset, len;
535 char *ptr;
536
537 len = strlen(str) + 1;
538 offset = dw->data_offset;
539 ptr = section_ptr_add(dw, len);
540 memmove(ptr, str, len);
541 put_elf_reloca(symtab_section, s, s->data_offset, R_DATA_32DW, sym,
542 PTR_SIZE == 4 ? 0 : offset);
543 dwarf_data4(s, PTR_SIZE == 4 ? offset : 0);
544 }
545
546 static void dwarf_strp(Section *s, const char *str)
547 {
548 TCCState *s1 = s->s1;
549 dwarf_string(s, dwarf_str_section, dwarf_sym.str, str);
550 }
551
552 static void dwarf_line_strp(Section *s, const char *str)
553 {
554 TCCState *s1 = s->s1;
555 dwarf_string(s, dwarf_line_str_section, dwarf_sym.line_str, str);
556 }
557
558 static void dwarf_line_op(TCCState *s1, unsigned char op)
559 {
560 if (dwarf_line.line_size >= dwarf_line.line_max_size) {
561 dwarf_line.line_max_size += 1024;
562 dwarf_line.line_data =
563 (unsigned char *)tcc_realloc(dwarf_line.line_data,
564 dwarf_line.line_max_size);
565 }
566 dwarf_line.line_data[dwarf_line.line_size++] = op;
567 }
568
569 static void dwarf_file(TCCState *s1)
570 {
571 int i, j;
572 char *filename;
573 int index_offset = s1->dwarf < 5;
574
575 if (!strcmp(file->filename, "<command line>")) {
576 dwarf_line.cur_file = 1;
577 return;
578 }
579 filename = strrchr(file->filename, '/');
580 if (filename == NULL) {
581 for (i = 1; i < dwarf_line.filename_size; i++)
582 if (dwarf_line.filename_table[i].dir_entry == 0 &&
583 strcmp(dwarf_line.filename_table[i].name,
584 file->filename) == 0) {
585 dwarf_line.cur_file = i + index_offset;
586 return;
587 }
588 i = -index_offset;
589 filename = file->filename;
590 }
591 else {
592 char *undo = filename;
593 char *dir = file->filename;
594
595 *filename++ = '\0';
596 for (i = 0; i < dwarf_line.dir_size; i++)
597 if (strcmp(dwarf_line.dir_table[i], dir) == 0) {
598 for (j = 1; j < dwarf_line.filename_size; j++)
599 if (dwarf_line.filename_table[j].dir_entry - index_offset
600 == i &&
601 strcmp(dwarf_line.filename_table[j].name,
602 filename) == 0) {
603 *undo = '/';
604 dwarf_line.cur_file = j + index_offset;
605 return;
606 }
607 break;
608 }
609 if (i == dwarf_line.dir_size) {
610 dwarf_line.dir_size++;
611 dwarf_line.dir_table =
612 (char **) tcc_realloc(dwarf_line.dir_table,
613 dwarf_line.dir_size *
614 sizeof (char *));
615 dwarf_line.dir_table[i] = tcc_strdup(dir);
616 }
617 *undo = '/';
618 }
619 dwarf_line.filename_table =
620 (struct dwarf_filename_struct *)
621 tcc_realloc(dwarf_line.filename_table,
622 (dwarf_line.filename_size + 1) *
623 sizeof (struct dwarf_filename_struct));
624 dwarf_line.filename_table[dwarf_line.filename_size].dir_entry =
625 i + index_offset;
626 dwarf_line.filename_table[dwarf_line.filename_size].name =
627 tcc_strdup(filename);
628 dwarf_line.cur_file = dwarf_line.filename_size++ + index_offset;
629 return;
630 }
631
632 #if 0
633 static int dwarf_uleb128_size (unsigned long long value)
634 {
635 int size = 0;
636
637 do {
638 value >>= 7;
639 size++;
640 } while (value != 0);
641 return size;
642 }
643 #endif
644
645 static int dwarf_sleb128_size (long long value)
646 {
647 int size = 0;
648 long long end = value >> 63;
649 unsigned char last = end & 0x40;
650 unsigned char byte;
651
652 do {
653 byte = value & 0x7f;
654 value >>= 7;
655 size++;
656 } while (value != end || (byte & 0x40) != last);
657 return size;
658 }
659
660 static void dwarf_uleb128 (Section *s, unsigned long long value)
661 {
662 do {
663 unsigned char byte = value & 0x7f;
664
665 value >>= 7;
666 dwarf_data1(s, byte | (value ? 0x80 : 0));
667 } while (value != 0);
668 }
669
670 static void dwarf_sleb128 (Section *s, long long value)
671 {
672 int more;
673 long long end = value >> 63;
674 unsigned char last = end & 0x40;
675
676 do {
677 unsigned char byte = value & 0x7f;
678
679 value >>= 7;
680 more = value != end || (byte & 0x40) != last;
681 dwarf_data1(s, byte | (0x80 * more));
682 } while (more);
683 }
684
685 static void dwarf_uleb128_op (TCCState *s1, unsigned long long value)
686 {
687 do {
688 unsigned char byte = value & 0x7f;
689
690 value >>= 7;
691 dwarf_line_op(s1, byte | (value ? 0x80 : 0));
692 } while (value != 0);
693 }
694
695 static void dwarf_sleb128_op (TCCState *s1, long long value)
696 {
697 int more;
698 long long end = value >> 63;
699 unsigned char last = end & 0x40;
700
701 do {
702 unsigned char byte = value & 0x7f;
703
704 value >>= 7;
705 more = value != end || (byte & 0x40) != last;
706 dwarf_line_op(s1, byte | (0x80 * more));
707 } while (more);
708 }
709
710 /* start of translation unit info */
711 ST_FUNC void tcc_debug_start(TCCState *s1)
712 {
713 int i;
714 char buf[512];
715 char *filename;
716
717 /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
718 symbols can be safely used */
719 filename = file->prev ? file->prev->filename : file->filename;
720 put_elf_sym(symtab_section, 0, 0,
721 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
722 SHN_ABS, filename);
723
724 if (s1->do_debug) {
725
726 new_file = last_line_num = 0;
727 debug_next_type = N_DEFAULT_DEBUG;
728 debug_hash = NULL;
729 debug_anon_hash = NULL;
730 n_debug_hash = 0;
731 n_debug_anon_hash = 0;
732
733 getcwd(buf, sizeof(buf));
734 #ifdef _WIN32
735 normalize_slashes(buf);
736 #endif
737
738 if (s1->dwarf) {
739 int start_abbrev;
740 unsigned char *ptr;
741 char *undo;
742
743 /* dwarf_abbrev */
744 start_abbrev = dwarf_abbrev_section->data_offset;
745 ptr = section_ptr_add(dwarf_abbrev_section, sizeof(dwarf_abbrev_init));
746 memcpy(ptr, dwarf_abbrev_init, sizeof(dwarf_abbrev_init));
747
748 if (s1->dwarf < 5) {
749 while (*ptr) {
750 ptr += 3;
751 while (*ptr) {
752 if (ptr[1] == DW_FORM_line_strp)
753 ptr[1] = DW_FORM_strp;
754 if (s1->dwarf < 4) {
755 /* These are compatable for DW_TAG_compile_unit
756 DW_AT_stmt_list. */
757 if (ptr[1] == DW_FORM_sec_offset)
758 ptr[1] = DW_FORM_data4;
759 /* This code uses only size < 0x80 so these are
760 compatible. */
761 if (ptr[1] == DW_FORM_exprloc)
762 ptr[1] = DW_FORM_block1;
763 }
764 ptr += 2;
765 }
766 ptr += 2;
767 }
768 }
769
770 dwarf_sym.info = dwarf_get_section_sym(dwarf_info_section);
771 dwarf_sym.abbrev = dwarf_get_section_sym(dwarf_abbrev_section);
772 dwarf_sym.line = dwarf_get_section_sym(dwarf_line_section);
773 dwarf_sym.str = dwarf_get_section_sym(dwarf_str_section);
774 if (tcc_state->dwarf >= 5)
775 dwarf_sym.line_str = dwarf_get_section_sym(dwarf_line_str_section);
776 else {
777 dwarf_line_str_section = dwarf_str_section;
778 dwarf_sym.line_str = dwarf_sym.str;
779 }
780 section_sym = dwarf_get_section_sym(text_section);
781
782 /* dwarf_info */
783 dwarf_info.start = dwarf_info_section->data_offset;
784 dwarf_data4(dwarf_info_section, 0); // size
785 dwarf_data2(dwarf_info_section, s1->dwarf); // version
786 if (s1->dwarf >= 5) {
787 dwarf_data1(dwarf_info_section, DW_UT_compile); // unit type
788 dwarf_data1(dwarf_info_section, PTR_SIZE);
789 dwarf_reloc(dwarf_info_section, dwarf_sym.abbrev, R_DATA_32DW);
790 dwarf_data4(dwarf_info_section, start_abbrev);
791 }
792 else {
793 dwarf_reloc(dwarf_info_section, dwarf_sym.abbrev, R_DATA_32DW);
794 dwarf_data4(dwarf_info_section, start_abbrev);
795 dwarf_data1(dwarf_info_section, PTR_SIZE);
796 }
797
798 dwarf_data1(dwarf_info_section, DWARF_ABBREV_COMPILE_UNIT);
799 dwarf_strp(dwarf_info_section, "tcc " TCC_VERSION);
800 dwarf_data1(dwarf_info_section, DW_LANG_C11);
801 dwarf_line_strp(dwarf_info_section, filename);
802 dwarf_line_strp(dwarf_info_section, buf);
803 dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
804 #if PTR_SIZE == 4
805 dwarf_data4(dwarf_info_section, ind); // low pc
806 dwarf_data4(dwarf_info_section, 0); // high pc
807 #else
808 dwarf_data8(dwarf_info_section, ind); // low pc
809 dwarf_data8(dwarf_info_section, 0); // high pc
810 #endif
811 dwarf_reloc(dwarf_info_section, dwarf_sym.line, R_DATA_32DW);
812 dwarf_data4(dwarf_info_section, dwarf_line_section->data_offset); // stmt_list
813
814 /* dwarf_line */
815 dwarf_line.start = dwarf_line_section->data_offset;
816 dwarf_data4(dwarf_line_section, 0); // length
817 dwarf_data2(dwarf_line_section, s1->dwarf); // version
818 if (s1->dwarf >= 5) {
819 dwarf_data1(dwarf_line_section, PTR_SIZE); // address size
820 dwarf_data1(dwarf_line_section, 0); // segment selector
821 }
822 dwarf_data4(dwarf_line_section, 0); // prologue Length
823 dwarf_data1(dwarf_line_section, DWARF_MIN_INSTR_LEN);
824 if (s1->dwarf >= 4)
825 dwarf_data1(dwarf_line_section, 1); // maximum ops per instruction
826 dwarf_data1(dwarf_line_section, 1); // Initial value of 'is_stmt'
827 dwarf_data1(dwarf_line_section, DWARF_LINE_BASE);
828 dwarf_data1(dwarf_line_section, DWARF_LINE_RANGE);
829 dwarf_data1(dwarf_line_section, DWARF_OPCODE_BASE);
830 ptr = section_ptr_add(dwarf_line_section, sizeof(dwarf_line_opcodes));
831 memcpy(ptr, dwarf_line_opcodes, sizeof(dwarf_line_opcodes));
832 undo = strrchr(filename, '/');
833 if (undo)
834 *undo = 0;
835 dwarf_line.dir_size = 1 + (undo != NULL);
836 dwarf_line.dir_table = (char **) tcc_malloc(sizeof (char *) *
837 dwarf_line.dir_size);
838 dwarf_line.dir_table[0] = tcc_strdup(buf);
839 if (undo)
840 dwarf_line.dir_table[1] = tcc_strdup(filename);
841 dwarf_line.filename_size = 2;
842 dwarf_line.filename_table =
843 (struct dwarf_filename_struct *)
844 tcc_malloc(2*sizeof (struct dwarf_filename_struct));
845 dwarf_line.filename_table[0].dir_entry = 0;
846 if (undo) {
847 dwarf_line.filename_table[0].name = tcc_strdup(undo + 1);
848 dwarf_line.filename_table[1].dir_entry = 1;
849 dwarf_line.filename_table[1].name = tcc_strdup(undo + 1);
850 *undo = '/';
851 }
852 else {
853 dwarf_line.filename_table[0].name = tcc_strdup(filename);
854 dwarf_line.filename_table[1].dir_entry = 0;
855 dwarf_line.filename_table[1].name = tcc_strdup(filename);
856 }
857 dwarf_line.line_size = dwarf_line.line_max_size = 0;
858 dwarf_line.line_data = NULL;
859 dwarf_line.cur_file = 1;
860 dwarf_line.last_file = 0;
861 dwarf_line.last_pc = 0;
862 dwarf_line.last_line = 1;
863 dwarf_line_op(s1, 0); // extended
864 dwarf_uleb128_op(s1, 1 + PTR_SIZE); // extended size
865 dwarf_line_op(s1, DW_LNE_set_address);
866 for (i = 0; i < PTR_SIZE; i++)
867 dwarf_line_op(s1, 0);
868 memset(&dwarf_info.base_type_used, 0, sizeof(dwarf_info.base_type_used));
869 }
870 else
871 {
872 /* file info: full path + filename */
873 pstrcat(buf, sizeof(buf), "/");
874 section_sym = put_elf_sym(symtab_section, 0, 0,
875 ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
876 text_section->sh_num, NULL);
877 put_stabs_r(s1, buf, N_SO, 0, 0,
878 text_section->data_offset, text_section, section_sym);
879 put_stabs_r(s1, filename, N_SO, 0, 0,
880 text_section->data_offset, text_section, section_sym);
881 for (i = 0; i < N_DEFAULT_DEBUG; i++)
882 put_stabs(s1, default_debug[i].name, N_LSYM, 0, 0, 0);
883 }
884 /* we're currently 'including' the <command line> */
885 tcc_debug_bincl(s1);
886 }
887 }
888
889 /* put end of translation unit info */
890 ST_FUNC void tcc_debug_end(TCCState *s1)
891 {
892 if (!s1->do_debug || debug_next_type == 0)
893 return;
894
895 if (debug_info_root)
896 tcc_debug_funcend(s1, 0); /* free stuff in case of errors */
897
898 if (s1->dwarf) {
899 int i, j;
900 int start_aranges;
901 unsigned char *ptr;
902 int text_size = text_section->data_offset;
903
904 /* dwarf_info */
905 for (i = 0; i < n_debug_anon_hash; i++) {
906 Sym *t = debug_anon_hash[i].type;
907 int pos = dwarf_info_section->data_offset;
908
909 dwarf_data1(dwarf_info_section,
910 IS_UNION (t->type.t) ? DWARF_ABBREV_UNION_EMPTY_TYPE
911 : DWARF_ABBREV_STRUCTURE_EMPTY_TYPE);
912 dwarf_strp(dwarf_info_section,
913 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
914 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL));
915 dwarf_uleb128(dwarf_info_section, 0);
916 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
917 dwarf_uleb128(dwarf_info_section, file->line_num);
918 for (j = 0; j < debug_anon_hash[i].n_debug_type; j++)
919 write32le(dwarf_info_section->data +
920 debug_anon_hash[i].debug_type[j],
921 pos - dwarf_info.start);
922 tcc_free (debug_anon_hash[i].debug_type);
923 }
924 tcc_free (debug_anon_hash);
925 dwarf_data1(dwarf_info_section, 0);
926 ptr = dwarf_info_section->data + dwarf_info.start;
927 write32le(ptr, dwarf_info_section->data_offset - dwarf_info.start - 4);
928 write32le(ptr + 25 + (s1->dwarf >= 5) + PTR_SIZE, text_size);
929
930 /* dwarf_aranges */
931 start_aranges = dwarf_aranges_section->data_offset;
932 dwarf_data4(dwarf_aranges_section, 0); // size
933 dwarf_data2(dwarf_aranges_section, 2); // version
934 dwarf_reloc(dwarf_aranges_section, dwarf_sym.info, R_DATA_32DW);
935 dwarf_data4(dwarf_aranges_section, 0); // dwarf_info
936 #if PTR_SIZE == 4
937 dwarf_data1(dwarf_aranges_section, 4); // address size
938 #else
939 dwarf_data1(dwarf_aranges_section, 8); // address size
940 #endif
941 dwarf_data1(dwarf_aranges_section, 0); // segment selector size
942 dwarf_data4(dwarf_aranges_section, 0); // padding
943 dwarf_reloc(dwarf_aranges_section, section_sym, R_DATA_PTR);
944 #if PTR_SIZE == 4
945 dwarf_data4(dwarf_aranges_section, 0); // Begin
946 dwarf_data4(dwarf_aranges_section, text_size); // End
947 dwarf_data4(dwarf_aranges_section, 0); // End list
948 dwarf_data4(dwarf_aranges_section, 0); // End list
949 #else
950 dwarf_data8(dwarf_aranges_section, 0); // Begin
951 dwarf_data8(dwarf_aranges_section, text_size); // End
952 dwarf_data8(dwarf_aranges_section, 0); // End list
953 dwarf_data8(dwarf_aranges_section, 0); // End list
954 #endif
955 ptr = dwarf_aranges_section->data + start_aranges;
956 write32le(ptr, dwarf_aranges_section->data_offset - start_aranges - 4);
957
958 /* dwarf_line */
959 if (s1->dwarf >= 5) {
960 dwarf_data1(dwarf_line_section, 1); /* col */
961 dwarf_uleb128(dwarf_line_section, DW_LNCT_path);
962 dwarf_uleb128(dwarf_line_section, DW_FORM_line_strp);
963 dwarf_uleb128(dwarf_line_section, dwarf_line.dir_size);
964 for (i = 0; i < dwarf_line.dir_size; i++)
965 dwarf_line_strp(dwarf_line_section, dwarf_line.dir_table[i]);
966 dwarf_data1(dwarf_line_section, 2); /* col */
967 dwarf_uleb128(dwarf_line_section, DW_LNCT_path);
968 dwarf_uleb128(dwarf_line_section, DW_FORM_line_strp);
969 dwarf_uleb128(dwarf_line_section, DW_LNCT_directory_index);
970 dwarf_uleb128(dwarf_line_section, DW_FORM_udata);
971 dwarf_uleb128(dwarf_line_section, dwarf_line.filename_size);
972 for (i = 0; i < dwarf_line.filename_size; i++) {
973 dwarf_line_strp(dwarf_line_section,
974 dwarf_line.filename_table[i].name);
975 dwarf_uleb128(dwarf_line_section,
976 dwarf_line.filename_table[i].dir_entry);
977 }
978 }
979 else {
980 int len;
981
982 for (i = 0; i < dwarf_line.dir_size; i++) {
983 len = strlen(dwarf_line.dir_table[i]) + 1;
984 ptr = section_ptr_add(dwarf_line_section, len);
985 memmove(ptr, dwarf_line.dir_table[i], len);
986 }
987 dwarf_data1(dwarf_line_section, 0); /* end dir */
988 for (i = 0; i < dwarf_line.filename_size; i++) {
989 len = strlen(dwarf_line.filename_table[i].name) + 1;
990 ptr = section_ptr_add(dwarf_line_section, len);
991 memmove(ptr, dwarf_line.filename_table[i].name, len);
992 dwarf_uleb128(dwarf_line_section,
993 dwarf_line.filename_table[i].dir_entry);
994 dwarf_uleb128(dwarf_line_section, 0); /* time */
995 dwarf_uleb128(dwarf_line_section, 0); /* size */
996 }
997 dwarf_data1(dwarf_line_section, 0); /* end file */
998 }
999 for (i = 0; i < dwarf_line.dir_size; i++)
1000 tcc_free(dwarf_line.dir_table[i]);
1001 tcc_free(dwarf_line.dir_table);
1002 for (i = 0; i < dwarf_line.filename_size; i++)
1003 tcc_free(dwarf_line.filename_table[i].name);
1004 tcc_free(dwarf_line.filename_table);
1005
1006 dwarf_line_op(s1, 0); // extended
1007 dwarf_uleb128_op(s1, 1); // extended size
1008 dwarf_line_op(s1, DW_LNE_end_sequence);
1009 i = (s1->dwarf >= 5) * 2;
1010 write32le(&dwarf_line_section->data[dwarf_line.start + 6 + i],
1011 dwarf_line_section->data_offset - dwarf_line.start - (10 + i));
1012 section_ptr_add(dwarf_line_section, 3);
1013 dwarf_reloc(dwarf_line_section, section_sym, R_DATA_PTR);
1014 ptr = section_ptr_add(dwarf_line_section, dwarf_line.line_size - 3);
1015 memmove(ptr - 3, dwarf_line.line_data, dwarf_line.line_size);
1016 tcc_free(dwarf_line.line_data);
1017 write32le(dwarf_line_section->data + dwarf_line.start,
1018 dwarf_line_section->data_offset - dwarf_line.start - 4);
1019 }
1020 else
1021 {
1022 put_stabs_r(s1, NULL, N_SO, 0, 0,
1023 text_section->data_offset, text_section, section_sym);
1024 }
1025 tcc_free(debug_hash);
1026 debug_next_type = 0;
1027 }
1028
1029 static BufferedFile* put_new_file(TCCState *s1)
1030 {
1031 BufferedFile *f = file;
1032 /* use upper file if from inline ":asm:" */
1033 if (f->filename[0] == ':')
1034 f = f->prev;
1035 if (f && new_file) {
1036 new_file = last_line_num = 0;
1037 if (s1->dwarf)
1038 dwarf_file(s1);
1039 else
1040 put_stabs_r(s1, f->filename, N_SOL, 0, 0, ind, text_section, section_sym);
1041 }
1042 return f;
1043 }
1044
1045 /* put alternative filename */
1046 ST_FUNC void tcc_debug_putfile(TCCState *s1, const char *filename)
1047 {
1048 if (0 == strcmp(file->filename, filename))
1049 return;
1050 pstrcpy(file->filename, sizeof(file->filename), filename);
1051 if (!s1->do_debug)
1052 return;
1053 if (s1->dwarf)
1054 dwarf_file(s1);
1055 new_file = 1;
1056 }
1057
1058 /* begin of #include */
1059 ST_FUNC void tcc_debug_bincl(TCCState *s1)
1060 {
1061 if (!s1->do_debug)
1062 return;
1063 if (s1->dwarf)
1064 dwarf_file(s1);
1065 else
1066 put_stabs(s1, file->filename, N_BINCL, 0, 0, 0);
1067 new_file = 1;
1068 }
1069
1070 /* end of #include */
1071 ST_FUNC void tcc_debug_eincl(TCCState *s1)
1072 {
1073 if (!s1->do_debug)
1074 return;
1075 if (s1->dwarf)
1076 dwarf_file(s1);
1077 else
1078 put_stabn(s1, N_EINCL, 0, 0, 0);
1079 new_file = 1;
1080 }
1081
1082 /* generate line number info */
1083 ST_FUNC void tcc_debug_line(TCCState *s1)
1084 {
1085 BufferedFile *f;
1086
1087 if (!s1->do_debug)
1088 return;
1089 if (cur_text_section != text_section || nocode_wanted)
1090 return;
1091 f = put_new_file(s1);
1092 if (!f)
1093 return;
1094 if (last_line_num == f->line_num)
1095 return;
1096 last_line_num = f->line_num;
1097
1098 if (s1->dwarf) {
1099 int len_pc = (ind - dwarf_line.last_pc) / DWARF_MIN_INSTR_LEN;
1100 int len_line = f->line_num - dwarf_line.last_line;
1101 int n = len_pc * DWARF_LINE_RANGE + len_line + DWARF_OPCODE_BASE - DWARF_LINE_BASE;
1102
1103 if (dwarf_line.cur_file != dwarf_line.last_file) {
1104 dwarf_line.last_file = dwarf_line.cur_file;
1105 dwarf_line_op(s1, DW_LNS_set_file);
1106 dwarf_uleb128_op(s1, dwarf_line.cur_file);
1107 }
1108 if (len_pc &&
1109 len_line >= DWARF_LINE_BASE && len_line <= (DWARF_OPCODE_BASE + DWARF_LINE_BASE) &&
1110 n >= DWARF_OPCODE_BASE && n <= 255)
1111 dwarf_line_op(s1, n);
1112 else {
1113 if (len_pc) {
1114 n = len_pc * DWARF_LINE_RANGE + 0 + DWARF_OPCODE_BASE - DWARF_LINE_BASE;
1115 if (n >= DWARF_OPCODE_BASE && n <= 255)
1116 dwarf_line_op(s1, n);
1117 else {
1118 dwarf_line_op(s1, DW_LNS_advance_pc);
1119 dwarf_uleb128_op(s1, len_pc);
1120 }
1121 }
1122 if (len_line) {
1123 n = 0 * DWARF_LINE_RANGE + len_line + DWARF_OPCODE_BASE - DWARF_LINE_BASE;
1124 if (len_line >= DWARF_LINE_BASE && len_line <= (DWARF_OPCODE_BASE + DWARF_LINE_BASE) &&
1125 n >= DWARF_OPCODE_BASE && n <= 255)
1126 dwarf_line_op(s1, n);
1127 else {
1128 dwarf_line_op(s1, DW_LNS_advance_line);
1129 dwarf_sleb128_op(s1, len_line);
1130 }
1131 }
1132 }
1133 dwarf_line.last_pc = ind;
1134 dwarf_line.last_line = f->line_num;
1135 }
1136 else
1137 {
1138 if (func_ind != -1) {
1139 put_stabn(s1, N_SLINE, 0, f->line_num, ind - func_ind);
1140 } else {
1141 /* from tcc_assemble */
1142 put_stabs_r(s1, NULL, N_SLINE, 0, f->line_num, ind, text_section, section_sym);
1143 }
1144 }
1145 }
1146
1147 static void tcc_debug_stabs (TCCState *s1, const char *str, int type, unsigned long value,
1148 Section *sec, int sym_index, int info)
1149 {
1150 struct debug_sym *s;
1151
1152 if (debug_info) {
1153 debug_info->sym =
1154 (struct debug_sym *)tcc_realloc (debug_info->sym,
1155 sizeof(struct debug_sym) *
1156 (debug_info->n_sym + 1));
1157 s = debug_info->sym + debug_info->n_sym++;
1158 s->type = type;
1159 s->value = value;
1160 s->str = tcc_strdup(str);
1161 s->sec = sec;
1162 s->sym_index = sym_index;
1163 s->info = info;
1164 s->file = dwarf_line.cur_file;
1165 s->line = file->line_num;
1166 }
1167 else if (sec)
1168 put_stabs_r (s1, str, type, 0, 0, value, sec, sym_index);
1169 else
1170 put_stabs (s1, str, type, 0, 0, value);
1171 }
1172
1173 ST_FUNC void tcc_debug_stabn(TCCState *s1, int type, int value)
1174 {
1175 if (!s1->do_debug)
1176 return;
1177 if (type == N_LBRAC) {
1178 struct _debug_info *info =
1179 (struct _debug_info *) tcc_mallocz(sizeof (*info));
1180
1181 info->start = value;
1182 info->parent = debug_info;
1183 if (debug_info) {
1184 if (debug_info->child) {
1185 if (debug_info->child->last)
1186 debug_info->child->last->next = info;
1187 else
1188 debug_info->child->next = info;
1189 debug_info->child->last = info;
1190 }
1191 else
1192 debug_info->child = info;
1193 }
1194 else
1195 debug_info_root = info;
1196 debug_info = info;
1197 }
1198 else {
1199 debug_info->end = value;
1200 debug_info = debug_info->parent;
1201 }
1202 }
1203
1204 static int tcc_debug_find(TCCState *s1, Sym *t, int dwarf)
1205 {
1206 int i;
1207
1208 if (!debug_info && dwarf &&
1209 (t->type.t & VT_BTYPE) == VT_STRUCT && t->c == -1) {
1210 for (i = 0; i < n_debug_anon_hash; i++)
1211 if (t == debug_anon_hash[i].type)
1212 return 0;
1213 debug_anon_hash = (struct _debug_anon_hash *)
1214 tcc_realloc (debug_anon_hash,
1215 (n_debug_anon_hash + 1) * sizeof(*debug_anon_hash));
1216 debug_anon_hash[n_debug_anon_hash].n_debug_type = 0;
1217 debug_anon_hash[n_debug_anon_hash].debug_type = NULL;
1218 debug_anon_hash[n_debug_anon_hash++].type = t;
1219 return 0;
1220 }
1221 for (i = 0; i < n_debug_hash; i++)
1222 if (t == debug_hash[i].type)
1223 return debug_hash[i].debug_type;
1224 return -1;
1225 }
1226
1227 static int tcc_get_dwarf_info(TCCState *s1, Sym *s);
1228
1229 static void tcc_debug_check_anon(TCCState *s1, Sym *t, int debug_type)
1230 {
1231 int i;
1232
1233 if (!debug_info && (t->type.t & VT_BTYPE) == VT_STRUCT && t->type.ref->c == -1)
1234 for (i = 0; i < n_debug_anon_hash; i++)
1235 if (t->type.ref == debug_anon_hash[i].type) {
1236 debug_anon_hash[i].debug_type =
1237 tcc_realloc(debug_anon_hash[i].debug_type,
1238 (debug_anon_hash[i].n_debug_type + 1) * sizeof(int));
1239 debug_anon_hash[i].debug_type[debug_anon_hash[i].n_debug_type++] =
1240 debug_type;
1241 }
1242 }
1243
1244 ST_FUNC void tcc_debug_fix_anon(TCCState *s1, CType *t)
1245 {
1246 int i, j, debug_type;
1247
1248 if (!(s1->do_debug & 2) || !s1->dwarf || debug_info)
1249 return;
1250
1251 if ((t->t & VT_BTYPE) == VT_STRUCT && t->ref->c != -1)
1252 for (i = 0; i < n_debug_anon_hash; i++)
1253 if (t->ref == debug_anon_hash[i].type) {
1254 Sym sym = {0}; sym .type = *t ;
1255
1256 /* Trick to not hash this struct */
1257 debug_info = (struct _debug_info *) t;
1258 debug_type = tcc_get_dwarf_info(s1, &sym);
1259 debug_info = NULL;
1260 for (j = 0; j < debug_anon_hash[i].n_debug_type; j++)
1261 write32le(dwarf_info_section->data +
1262 debug_anon_hash[i].debug_type[j],
1263 debug_type - dwarf_info.start);
1264 tcc_free(debug_anon_hash[i].debug_type);
1265 n_debug_anon_hash--;
1266 for (; i < n_debug_anon_hash; i++)
1267 debug_anon_hash[i] = debug_anon_hash[i + 1];
1268 }
1269 }
1270
1271 static int tcc_debug_add(TCCState *s1, Sym *t, int dwarf)
1272 {
1273 int offset = dwarf ? dwarf_info_section->data_offset : ++debug_next_type;
1274 debug_hash = (struct _debug_hash *)
1275 tcc_realloc (debug_hash,
1276 (n_debug_hash + 1) * sizeof(*debug_hash));
1277 debug_hash[n_debug_hash].debug_type = offset;
1278 debug_hash[n_debug_hash++].type = t;
1279 return offset;
1280 }
1281
1282 static void tcc_debug_remove(TCCState *s1, Sym *t)
1283 {
1284 int i;
1285
1286 for (i = 0; i < n_debug_hash; i++)
1287 if (t == debug_hash[i].type) {
1288 n_debug_hash--;
1289 for (; i < n_debug_hash; i++)
1290 debug_hash[i] = debug_hash[i+1];
1291 }
1292 }
1293
1294 #define STRUCT_NODEBUG(s) \
1295 (s->a.nodebug || \
1296 ((s->v & ~SYM_FIELD) >= SYM_FIRST_ANOM && \
1297 ((s->type.t & VT_BTYPE) == VT_BYTE || \
1298 (s->type.t & VT_BTYPE) == VT_BOOL || \
1299 (s->type.t & VT_BTYPE) == VT_SHORT || \
1300 (s->type.t & VT_BTYPE) == VT_INT || \
1301 (s->type.t & VT_BTYPE) == VT_LLONG)))
1302
1303 static void tcc_get_debug_info(TCCState *s1, Sym *s, CString *result)
1304 {
1305 int type;
1306 int n = 0;
1307 int debug_type = -1;
1308 Sym *t = s;
1309 CString str;
1310
1311 for (;;) {
1312 type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
1313 if ((type & VT_BTYPE) != VT_BYTE)
1314 type &= ~VT_DEFSIGN;
1315 if (type == VT_PTR || type == (VT_PTR | VT_ARRAY))
1316 n++, t = t->type.ref;
1317 else
1318 break;
1319 }
1320 if ((type & VT_BTYPE) == VT_STRUCT) {
1321 Sym *e = t;
1322
1323 t = t->type.ref;
1324 debug_type = tcc_debug_find(s1, t, 0);
1325 if (debug_type == -1) {
1326 debug_type = tcc_debug_add(s1, t, 0);
1327 cstr_new (&str);
1328 cstr_printf (&str, "%s:T%d=%c%d",
1329 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
1330 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL),
1331 debug_type,
1332 IS_UNION (t->type.t) ? 'u' : 's',
1333 t->c);
1334 while (t->next) {
1335 int pos, size, align;
1336
1337 t = t->next;
1338 if (STRUCT_NODEBUG(t))
1339 continue;
1340 cstr_printf (&str, "%s:",
1341 get_tok_str(t->v & ~SYM_FIELD, NULL));
1342 tcc_get_debug_info (s1, t, &str);
1343 if (t->type.t & VT_BITFIELD) {
1344 pos = t->c * 8 + BIT_POS(t->type.t);
1345 size = BIT_SIZE(t->type.t);
1346 }
1347 else {
1348 pos = t->c * 8;
1349 size = type_size(&t->type, &align) * 8;
1350 }
1351 cstr_printf (&str, ",%d,%d;", pos, size);
1352 }
1353 cstr_printf (&str, ";");
1354 tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0, 0);
1355 cstr_free (&str);
1356 if (debug_info)
1357 tcc_debug_remove(s1, e);
1358 }
1359 }
1360 else if (IS_ENUM(type)) {
1361 Sym *e = t = t->type.ref;
1362
1363 debug_type = tcc_debug_find(s1, t, 0);
1364 if (debug_type == -1) {
1365 debug_type = tcc_debug_add(s1, t, 0);
1366 cstr_new (&str);
1367 cstr_printf (&str, "%s:T%d=e",
1368 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
1369 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL),
1370 debug_type);
1371 while (t->next) {
1372 t = t->next;
1373 cstr_printf (&str, "%s:",
1374 (t->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
1375 ? "" : get_tok_str(t->v & ~SYM_FIELD, NULL));
1376 cstr_printf (&str, e->type.t & VT_UNSIGNED ? "%u," : "%d,",
1377 (int)t->enum_val);
1378 }
1379 cstr_printf (&str, ";");
1380 tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0, 0);
1381 cstr_free (&str);
1382 if (debug_info)
1383 tcc_debug_remove(s1, e);
1384 }
1385 }
1386 else if ((type & VT_BTYPE) != VT_FUNC) {
1387 type &= ~VT_STRUCT_MASK;
1388 for (debug_type = 1; debug_type <= N_DEFAULT_DEBUG; debug_type++)
1389 if (default_debug[debug_type - 1].type == type)
1390 break;
1391 if (debug_type > N_DEFAULT_DEBUG)
1392 return;
1393 }
1394 if (n > 0)
1395 cstr_printf (result, "%d=", ++debug_next_type);
1396 t = s;
1397 for (;;) {
1398 type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
1399 if ((type & VT_BTYPE) != VT_BYTE)
1400 type &= ~VT_DEFSIGN;
1401 if (type == VT_PTR)
1402 cstr_printf (result, "%d=*", ++debug_next_type);
1403 else if (type == (VT_PTR | VT_ARRAY))
1404 cstr_printf (result, "%d=ar1;0;%d;",
1405 ++debug_next_type, t->type.ref->c - 1);
1406 else if (type == VT_FUNC) {
1407 cstr_printf (result, "%d=f", ++debug_next_type);
1408 tcc_get_debug_info (s1, t->type.ref, result);
1409 return;
1410 }
1411 else
1412 break;
1413 t = t->type.ref;
1414 }
1415 cstr_printf (result, "%d", debug_type);
1416 }
1417
1418 static int tcc_get_dwarf_info(TCCState *s1, Sym *s)
1419 {
1420 int type;
1421 int debug_type = -1;
1422 Sym *e, *t = s;
1423 int i;
1424 int last_pos = -1;
1425 int retval;
1426
1427 if (new_file)
1428 put_new_file(s1);
1429 for (;;) {
1430 type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
1431 if ((type & VT_BTYPE) != VT_BYTE)
1432 type &= ~VT_DEFSIGN;
1433 if (type == VT_PTR || type == (VT_PTR | VT_ARRAY))
1434 t = t->type.ref;
1435 else
1436 break;
1437 }
1438 if ((type & VT_BTYPE) == VT_STRUCT) {
1439 t = t->type.ref;
1440 debug_type = tcc_debug_find(s1, t, 1);
1441 if (debug_type == -1) {
1442 int pos_sib = 0, i, *pos_type;
1443
1444 debug_type = tcc_debug_add(s1, t, 1);
1445 e = t;
1446 i = 0;
1447 while (e->next) {
1448 e = e->next;
1449 if (STRUCT_NODEBUG(e))
1450 continue;
1451 i++;
1452 }
1453 pos_type = (int *) tcc_malloc(i * sizeof(int));
1454 dwarf_data1(dwarf_info_section,
1455 IS_UNION (t->type.t)
1456 ? t->next ? DWARF_ABBREV_UNION_TYPE
1457 : DWARF_ABBREV_UNION_EMPTY_TYPE
1458 : t->next ? DWARF_ABBREV_STRUCTURE_TYPE
1459 : DWARF_ABBREV_STRUCTURE_EMPTY_TYPE);
1460 dwarf_strp(dwarf_info_section,
1461 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
1462 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL));
1463 dwarf_uleb128(dwarf_info_section, t->c);
1464 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1465 dwarf_uleb128(dwarf_info_section, file->line_num);
1466 if (t->next) {
1467 pos_sib = dwarf_info_section->data_offset;
1468 dwarf_data4(dwarf_info_section, 0);
1469 }
1470 e = t;
1471 i = 0;
1472 while (e->next) {
1473 e = e->next;
1474 if (STRUCT_NODEBUG(e))
1475 continue;
1476 dwarf_data1(dwarf_info_section,
1477 e->type.t & VT_BITFIELD ? DWARF_ABBREV_MEMBER_BF
1478 : DWARF_ABBREV_MEMBER);
1479 dwarf_strp(dwarf_info_section,
1480 get_tok_str(e->v & ~SYM_FIELD, NULL));
1481 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1482 dwarf_uleb128(dwarf_info_section, file->line_num);
1483 pos_type[i++] = dwarf_info_section->data_offset;
1484 dwarf_data4(dwarf_info_section, 0);
1485 if (e->type.t & VT_BITFIELD) {
1486 int pos = e->c * 8 + BIT_POS(e->type.t);
1487 int size = BIT_SIZE(e->type.t);
1488
1489 dwarf_uleb128(dwarf_info_section, size);
1490 dwarf_uleb128(dwarf_info_section, pos);
1491 }
1492 else
1493 dwarf_uleb128(dwarf_info_section, e->c);
1494 }
1495 if (t->next) {
1496 dwarf_data1(dwarf_info_section, 0);
1497 write32le(dwarf_info_section->data + pos_sib,
1498 dwarf_info_section->data_offset - dwarf_info.start);
1499 }
1500 e = t;
1501 i = 0;
1502 while (e->next) {
1503 e = e->next;
1504 if (STRUCT_NODEBUG(e))
1505 continue;
1506 type = tcc_get_dwarf_info(s1, e);
1507 tcc_debug_check_anon(s1, e, pos_type[i]);
1508 write32le(dwarf_info_section->data + pos_type[i++],
1509 type - dwarf_info.start);
1510 }
1511 tcc_free(pos_type);
1512 if (debug_info)
1513 tcc_debug_remove(s1, t);
1514 }
1515 }
1516 else if (IS_ENUM(type)) {
1517 t = t->type.ref;
1518 debug_type = tcc_debug_find(s1, t, 1);
1519 if (debug_type == -1) {
1520 int pos_sib, pos_type;
1521 Sym sym = {0}; sym.type.t = VT_INT | (type & VT_UNSIGNED);
1522
1523 pos_type = tcc_get_dwarf_info(s1, &sym);
1524 debug_type = tcc_debug_add(s1, t, 1);
1525 dwarf_data1(dwarf_info_section, DWARF_ABBREV_ENUMERATION_TYPE);
1526 dwarf_strp(dwarf_info_section,
1527 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
1528 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL));
1529 dwarf_data1(dwarf_info_section,
1530 type & VT_UNSIGNED ? DW_ATE_unsigned : DW_ATE_signed );
1531 dwarf_data1(dwarf_info_section, 4);
1532 dwarf_data4(dwarf_info_section, pos_type - dwarf_info.start);
1533 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1534 dwarf_uleb128(dwarf_info_section, file->line_num);
1535 pos_sib = dwarf_info_section->data_offset;
1536 dwarf_data4(dwarf_info_section, 0);
1537 e = t;
1538 while (e->next) {
1539 e = e->next;
1540 dwarf_data1(dwarf_info_section,
1541 type & VT_UNSIGNED ? DWARF_ABBREV_ENUMERATOR_UNSIGNED
1542 : DWARF_ABBREV_ENUMERATOR_SIGNED);
1543 dwarf_strp(dwarf_info_section,
1544 (e->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
1545 ? "" : get_tok_str(e->v & ~SYM_FIELD, NULL));
1546 if (type & VT_UNSIGNED)
1547 dwarf_uleb128(dwarf_info_section, e->enum_val);
1548 else
1549 dwarf_sleb128(dwarf_info_section, e->enum_val);
1550 }
1551 dwarf_data1(dwarf_info_section, 0);
1552 write32le(dwarf_info_section->data + pos_sib,
1553 dwarf_info_section->data_offset - dwarf_info.start);
1554 if (debug_info)
1555 tcc_debug_remove(s1, t);
1556 }
1557 }
1558 else if ((type & VT_BTYPE) != VT_FUNC) {
1559 type &= ~VT_STRUCT_MASK;
1560 for (i = 1; i <= N_DEFAULT_DEBUG; i++)
1561 if (default_debug[i - 1].type == type)
1562 break;
1563 if (i > N_DEFAULT_DEBUG)
1564 return 0;
1565 debug_type = dwarf_info.base_type_used[i - 1];
1566 if (debug_type == 0) {
1567 char name[100];
1568
1569 debug_type = dwarf_info_section->data_offset;
1570 dwarf_data1(dwarf_info_section, DWARF_ABBREV_BASE_TYPE);
1571 dwarf_uleb128(dwarf_info_section, default_debug[i - 1].size);
1572 dwarf_data1(dwarf_info_section, default_debug[i - 1].encoding);
1573 strncpy(name, default_debug[i - 1].name, sizeof(name) -1);
1574 *strchr(name, ':') = 0;
1575 dwarf_strp(dwarf_info_section, name);
1576 dwarf_info.base_type_used[i - 1] = debug_type;
1577 }
1578 }
1579 retval = debug_type;
1580 e = NULL;
1581 t = s;
1582 for (;;) {
1583 type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
1584 if ((type & VT_BTYPE) != VT_BYTE)
1585 type &= ~VT_DEFSIGN;
1586 if (type == VT_PTR) {
1587 i = dwarf_info_section->data_offset;
1588 if (retval == debug_type)
1589 retval = i;
1590 dwarf_data1(dwarf_info_section, DWARF_ABBREV_POINTER);
1591 dwarf_data1(dwarf_info_section, PTR_SIZE);
1592 if (last_pos != -1) {
1593 tcc_debug_check_anon(s1, e, last_pos);
1594 write32le(dwarf_info_section->data + last_pos,
1595 i - dwarf_info.start);
1596 }
1597 last_pos = dwarf_info_section->data_offset;
1598 e = t->type.ref;
1599 dwarf_data4(dwarf_info_section, 0);
1600 }
1601 else if (type == (VT_PTR | VT_ARRAY)) {
1602 int sib_pos, sub_type;
1603 #if LONG_SIZE == 4
1604 Sym sym = {0}; sym.type.t = VT_LONG | VT_INT | VT_UNSIGNED;
1605 #else
1606 Sym sym = {0}; sym.type.t = VT_LLONG | VT_LONG | VT_UNSIGNED;
1607 #endif
1608
1609 sub_type = tcc_get_dwarf_info(s1, &sym);
1610 i = dwarf_info_section->data_offset;
1611 if (retval == debug_type)
1612 retval = i;
1613 dwarf_data1(dwarf_info_section, DWARF_ABBREV_ARRAY_TYPE);
1614 if (last_pos != -1) {
1615 tcc_debug_check_anon(s1, e, last_pos);
1616 write32le(dwarf_info_section->data + last_pos,
1617 i - dwarf_info.start);
1618 }
1619 last_pos = dwarf_info_section->data_offset;
1620 e = t->type.ref;
1621 dwarf_data4(dwarf_info_section, 0);
1622 sib_pos = dwarf_info_section->data_offset;
1623 dwarf_data4(dwarf_info_section, 0);
1624 for (;;) {
1625 dwarf_data1(dwarf_info_section, DWARF_ABBREV_SUBRANGE_TYPE);
1626 dwarf_data4(dwarf_info_section, sub_type - dwarf_info.start);
1627 dwarf_uleb128(dwarf_info_section, t->type.ref->c - 1);
1628 s = t->type.ref;
1629 type = s->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE);
1630 if (type != (VT_PTR | VT_ARRAY))
1631 break;
1632 t = s;
1633 }
1634 dwarf_data1(dwarf_info_section, 0);
1635 write32le(dwarf_info_section->data + sib_pos,
1636 dwarf_info_section->data_offset - dwarf_info.start);
1637 }
1638 else if (type == VT_FUNC) {
1639 int sib_pos = 0, *pos_type;
1640 Sym *f;
1641
1642 i = dwarf_info_section->data_offset;
1643 debug_type = tcc_get_dwarf_info(s1, t->type.ref);
1644 if (retval == debug_type)
1645 retval = i;
1646 dwarf_data1(dwarf_info_section,
1647 t->type.ref->next ? DWARF_ABBREV_SUBROUTINE_TYPE
1648 : DWARF_ABBREV_SUBROUTINE_EMPTY_TYPE);
1649 if (last_pos != -1) {
1650 tcc_debug_check_anon(s1, e, last_pos);
1651 write32le(dwarf_info_section->data + last_pos,
1652 i - dwarf_info.start);
1653 }
1654 last_pos = dwarf_info_section->data_offset;
1655 e = t->type.ref;
1656 dwarf_data4(dwarf_info_section, 0);
1657 if (t->type.ref->next) {
1658 sib_pos = dwarf_info_section->data_offset;
1659 dwarf_data4(dwarf_info_section, 0);
1660 }
1661 f = t->type.ref;
1662 i = 0;
1663 while (f->next) {
1664 f = f->next;
1665 i++;
1666 }
1667 pos_type = (int *) tcc_malloc(i * sizeof(int));
1668 f = t->type.ref;
1669 i = 0;
1670 while (f->next) {
1671 f = f->next;
1672 dwarf_data1(dwarf_info_section, DWARF_ABBREV_FORMAL_PARAMETER2);
1673 pos_type[i++] = dwarf_info_section->data_offset;
1674 dwarf_data4(dwarf_info_section, 0);
1675 }
1676 if (t->type.ref->next) {
1677 dwarf_data1(dwarf_info_section, 0);
1678 write32le(dwarf_info_section->data + sib_pos,
1679 dwarf_info_section->data_offset - dwarf_info.start);
1680 }
1681 f = t->type.ref;
1682 i = 0;
1683 while (f->next) {
1684 f = f->next;
1685 type = tcc_get_dwarf_info(s1, f);
1686 tcc_debug_check_anon(s1, f, pos_type[i]);
1687 write32le(dwarf_info_section->data + pos_type[i++],
1688 type - dwarf_info.start);
1689 }
1690 tcc_free(pos_type);
1691 }
1692 else {
1693 if (last_pos != -1) {
1694 tcc_debug_check_anon(s1, e, last_pos);
1695 write32le(dwarf_info_section->data + last_pos,
1696 debug_type - dwarf_info.start);
1697 }
1698 break;
1699 }
1700 t = t->type.ref;
1701 }
1702 return retval;
1703 }
1704
1705 static void tcc_debug_finish (TCCState *s1, struct _debug_info *cur)
1706 {
1707 while (cur) {
1708 struct _debug_info *next = cur->next;
1709 int i;
1710
1711 if (s1->dwarf) {
1712
1713 for (i = cur->n_sym - 1; i >= 0; i--) {
1714 struct debug_sym *s = &cur->sym[i];
1715
1716 dwarf_data1(dwarf_info_section,
1717 s->type == N_PSYM
1718 ? DWARF_ABBREV_FORMAL_PARAMETER
1719 : s->type == N_GSYM
1720 ? DWARF_ABBREV_VARIABLE_EXTERNAL
1721 : s->type == N_STSYM
1722 ? DWARF_ABBREV_VARIABLE_STATIC
1723 : DWARF_ABBREV_VARIABLE_LOCAL);
1724 dwarf_strp(dwarf_info_section, s->str);
1725 if (s->type == N_GSYM || s->type == N_STSYM) {
1726 dwarf_uleb128(dwarf_info_section, s->file);
1727 dwarf_uleb128(dwarf_info_section, s->line);
1728 }
1729 dwarf_data4(dwarf_info_section, s->info - dwarf_info.start);
1730 if (s->type == N_GSYM || s->type == N_STSYM) {
1731 /* global/static */
1732 if (s->type == N_GSYM)
1733 dwarf_data1(dwarf_info_section, 1);
1734 dwarf_data1(dwarf_info_section, PTR_SIZE + 1);
1735 dwarf_data1(dwarf_info_section, DW_OP_addr);
1736 if (s->type == N_STSYM)
1737 dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
1738 #if PTR_SIZE == 4
1739 dwarf_data4(dwarf_info_section, s->value);
1740 #else
1741 dwarf_data8(dwarf_info_section, s->value);
1742 #endif
1743 }
1744 else {
1745 /* param/local */
1746 dwarf_data1(dwarf_info_section, dwarf_sleb128_size(s->value) + 1);
1747 dwarf_data1(dwarf_info_section, DW_OP_fbreg);
1748 dwarf_sleb128(dwarf_info_section, s->value);
1749 }
1750 tcc_free (s->str);
1751 }
1752 tcc_free (cur->sym);
1753 dwarf_data1(dwarf_info_section,
1754 cur->child ? DWARF_ABBREV_LEXICAL_BLOCK
1755 : DWARF_ABBREV_LEXICAL_EMPTY_BLOCK);
1756 dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
1757 #if PTR_SIZE == 4
1758 dwarf_data4(dwarf_info_section, func_ind + cur->start);
1759 dwarf_data4(dwarf_info_section, cur->end - cur->start);
1760 #else
1761 dwarf_data8(dwarf_info_section, func_ind + cur->start);
1762 dwarf_data8(dwarf_info_section, cur->end - cur->start);
1763 #endif
1764 tcc_debug_finish (s1, cur->child);
1765 if (cur->child)
1766 dwarf_data1(dwarf_info_section, 0);
1767 }
1768 else
1769 {
1770 for (i = 0; i < cur->n_sym; i++) {
1771 struct debug_sym *s = &cur->sym[i];
1772
1773 if (s->sec)
1774 put_stabs_r(s1, s->str, s->type, 0, 0, s->value,
1775 s->sec, s->sym_index);
1776 else
1777 put_stabs(s1, s->str, s->type, 0, 0, s->value);
1778 tcc_free (s->str);
1779 }
1780 tcc_free (cur->sym);
1781 put_stabn(s1, N_LBRAC, 0, 0, cur->start);
1782 tcc_debug_finish (s1, cur->child);
1783 put_stabn(s1, N_RBRAC, 0, 0, cur->end);
1784 }
1785 tcc_free (cur);
1786 cur = next;
1787 }
1788 }
1789
1790 ST_FUNC void tcc_add_debug_info(TCCState *s1, int param, Sym *s, Sym *e)
1791 {
1792 CString debug_str;
1793
1794 if (!(s1->do_debug & 2))
1795 return;
1796
1797 cstr_new (&debug_str);
1798 for (; s != e; s = s->prev) {
1799 if (!s->v || (s->r & VT_VALMASK) != VT_LOCAL)
1800 continue;
1801 if (s1->dwarf) {
1802 tcc_debug_stabs(s1, get_tok_str(s->v, NULL),
1803 param ? N_PSYM : N_LSYM, s->c, NULL, 0,
1804 tcc_get_dwarf_info(s1, s));
1805 }
1806 else
1807 {
1808 cstr_reset (&debug_str);
1809 cstr_printf (&debug_str, "%s:%s", get_tok_str(s->v, NULL),
1810 param ? "p" : "");
1811 tcc_get_debug_info(s1, s, &debug_str);
1812 tcc_debug_stabs(s1, debug_str.data, param ? N_PSYM : N_LSYM,
1813 s->c, NULL, 0, 0);
1814 }
1815 }
1816 cstr_free (&debug_str);
1817 }
1818
1819 /* put function symbol */
1820 ST_FUNC void tcc_debug_funcstart(TCCState *s1, Sym *sym)
1821 {
1822 CString debug_str;
1823 BufferedFile *f;
1824
1825 if (!s1->do_debug)
1826 return;
1827 debug_info_root = NULL;
1828 debug_info = NULL;
1829 tcc_debug_stabn(s1, N_LBRAC, ind - func_ind);
1830 f = put_new_file(s1);
1831 if (!f)
1832 return;
1833
1834 if (s1->dwarf) {
1835 tcc_debug_line(s1);
1836 dwarf_info.func = sym;
1837 dwarf_info.line = file->line_num;
1838 if (s1->do_backtrace) {
1839 int i, len;
1840
1841 dwarf_line_op(s1, 0); // extended
1842 dwarf_uleb128_op(s1, strlen(funcname) + 2);
1843 dwarf_line_op(s1, DW_LNE_hi_user - 1);
1844 len = strlen(funcname) + 1;
1845 for (i = 0; i < len; i++)
1846 dwarf_line_op(s1, funcname[i]);
1847 }
1848 }
1849 else
1850 {
1851 cstr_new (&debug_str);
1852 cstr_printf(&debug_str, "%s:%c", funcname, sym->type.t & VT_STATIC ? 'f' : 'F');
1853 tcc_get_debug_info(s1, sym->type.ref, &debug_str);
1854 put_stabs_r(s1, debug_str.data, N_FUN, 0, f->line_num, 0, cur_text_section, sym->c);
1855 cstr_free (&debug_str);
1856 tcc_debug_line(s1);
1857 }
1858 }
1859
1860 ST_FUNC void tcc_debug_prolog_epilog(TCCState *s1, int value)
1861 {
1862 if (!s1->do_debug)
1863 return;
1864 if (s1->dwarf) {
1865 dwarf_line_op(s1, value == 0 ? DW_LNS_set_prologue_end
1866 : DW_LNS_set_epilogue_begin);
1867 }
1868 }
1869
1870 /* put function size */
1871 ST_FUNC void tcc_debug_funcend(TCCState *s1, int size)
1872 {
1873 /* lldb does not like function end and next function start at same pc */
1874 int min_instr_len;
1875
1876 if (!s1->do_debug)
1877 return;
1878 min_instr_len = dwarf_line.last_pc == ind ? 0 : DWARF_MIN_INSTR_LEN;
1879 ind -= min_instr_len;
1880 tcc_debug_line(s1);
1881 ind += min_instr_len;
1882 tcc_debug_stabn(s1, N_RBRAC, size);
1883 if (s1->dwarf) {
1884 int func_sib = 0;
1885 Sym *sym = dwarf_info.func;
1886 int n_debug_info = tcc_get_dwarf_info(s1, sym->type.ref);
1887
1888 dwarf_data1(dwarf_info_section,
1889 sym->type.t & VT_STATIC ? DWARF_ABBREV_SUBPROGRAM_STATIC
1890 : DWARF_ABBREV_SUBPROGRAM_EXTERNAL);
1891 if ((sym->type.t & VT_STATIC) == 0)
1892 dwarf_data1(dwarf_info_section, 1);
1893 dwarf_strp(dwarf_info_section, funcname);
1894 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1895 dwarf_uleb128(dwarf_info_section, dwarf_info.line);
1896 tcc_debug_check_anon(s1, sym->type.ref, dwarf_info_section->data_offset);
1897 dwarf_data4(dwarf_info_section, n_debug_info - dwarf_info.start);
1898 dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
1899 #if PTR_SIZE == 4
1900 dwarf_data4(dwarf_info_section, func_ind); // low_pc
1901 dwarf_data4(dwarf_info_section, size); // high_pc
1902 #else
1903 dwarf_data8(dwarf_info_section, func_ind); // low_pc
1904 dwarf_data8(dwarf_info_section, size); // high_pc
1905 #endif
1906 func_sib = dwarf_info_section->data_offset;
1907 dwarf_data4(dwarf_info_section, 0); // sibling
1908 dwarf_data1(dwarf_info_section, 1);
1909 #if defined(TCC_TARGET_I386)
1910 dwarf_data1(dwarf_info_section, DW_OP_reg5); // ebp
1911 #elif defined(TCC_TARGET_X86_64)
1912 dwarf_data1(dwarf_info_section, DW_OP_reg6); // rbp
1913 #elif defined TCC_TARGET_ARM
1914 dwarf_data1(dwarf_info_section, DW_OP_reg13); // sp
1915 #elif defined TCC_TARGET_ARM64
1916 dwarf_data1(dwarf_info_section, DW_OP_reg29); // reg 29
1917 #elif defined TCC_TARGET_RISCV64
1918 dwarf_data1(dwarf_info_section, DW_OP_reg8); // r8(s0)
1919 #else
1920 dwarf_data1(dwarf_info_section, DW_OP_call_frame_cfa);
1921 #endif
1922 tcc_debug_finish (s1, debug_info_root);
1923 dwarf_data1(dwarf_info_section, 0);
1924 write32le(dwarf_info_section->data + func_sib,
1925 dwarf_info_section->data_offset - dwarf_info.start);
1926 }
1927 else
1928 {
1929 tcc_debug_finish (s1, debug_info_root);
1930 }
1931 debug_info_root = 0;
1932 }
1933
1934
1935 ST_FUNC void tcc_debug_extern_sym(TCCState *s1, Sym *sym, int sh_num, int sym_bind, int sym_type)
1936 {
1937 if (!(s1->do_debug & 2))
1938 return;
1939
1940 if (sym_type == STT_FUNC || sym->v >= SYM_FIRST_ANOM)
1941 return;
1942 if (s1->dwarf) {
1943 int debug_type;
1944
1945 debug_type = tcc_get_dwarf_info(s1, sym);
1946 dwarf_data1(dwarf_info_section,
1947 sym_bind == STB_GLOBAL
1948 ? DWARF_ABBREV_VARIABLE_EXTERNAL
1949 : DWARF_ABBREV_VARIABLE_STATIC);
1950 dwarf_strp(dwarf_info_section, get_tok_str(sym->v, NULL));
1951 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1952 dwarf_uleb128(dwarf_info_section, file->line_num);
1953 tcc_debug_check_anon(s1, sym, dwarf_info_section->data_offset);
1954 dwarf_data4(dwarf_info_section, debug_type - dwarf_info.start);
1955 if (sym_bind == STB_GLOBAL)
1956 dwarf_data1(dwarf_info_section, 1);
1957 dwarf_data1(dwarf_info_section, PTR_SIZE + 1);
1958 dwarf_data1(dwarf_info_section, DW_OP_addr);
1959 greloca(dwarf_info_section, sym, dwarf_info_section->data_offset,
1960 R_DATA_PTR, 0);
1961 #if PTR_SIZE == 4
1962 dwarf_data4(dwarf_info_section, 0);
1963 #else
1964 dwarf_data8(dwarf_info_section, 0);
1965 #endif
1966 }
1967 else
1968 {
1969 Section *s = sh_num == SHN_COMMON ? common_section
1970 : s1->sections[sh_num];
1971 CString str;
1972
1973 cstr_new (&str);
1974 cstr_printf (&str, "%s:%c",
1975 get_tok_str(sym->v, NULL),
1976 sym_bind == STB_GLOBAL ? 'G' : func_ind != -1 ? 'V' : 'S'
1977 );
1978 tcc_get_debug_info(s1, sym, &str);
1979 if (sym_bind == STB_GLOBAL)
1980 tcc_debug_stabs(s1, str.data, N_GSYM, 0, NULL, 0, 0);
1981 else
1982 tcc_debug_stabs(s1, str.data,
1983 (sym->type.t & VT_STATIC) && data_section == s
1984 ? N_STSYM : N_LCSYM, 0, s, sym->c, 0);
1985 cstr_free (&str);
1986 }
1987 }
1988
1989 ST_FUNC void tcc_debug_typedef(TCCState *s1, Sym *sym)
1990 {
1991 if (!(s1->do_debug & 2))
1992 return;
1993
1994 if (s1->dwarf) {
1995 int debug_type;
1996
1997 debug_type = tcc_get_dwarf_info(s1, sym);
1998 if (debug_type != -1) {
1999 dwarf_data1(dwarf_info_section, DWARF_ABBREV_TYPEDEF);
2000 dwarf_strp(dwarf_info_section, get_tok_str(sym->v & ~SYM_FIELD, NULL));
2001 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
2002 dwarf_uleb128(dwarf_info_section, file->line_num);
2003 tcc_debug_check_anon(s1, sym, dwarf_info_section->data_offset);
2004 dwarf_data4(dwarf_info_section, debug_type - dwarf_info.start);
2005 }
2006 }
2007 else
2008 {
2009 CString str;
2010 cstr_new (&str);
2011 cstr_printf (&str, "%s:t",
2012 (sym->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
2013 ? "" : get_tok_str(sym->v & ~SYM_FIELD, NULL));
2014 tcc_get_debug_info(s1, sym, &str);
2015 tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0, 0);
2016 cstr_free (&str);
2017 }
2018 }
2019
2020 /* ------------------------------------------------------------------------- */
2021 /* for section layout see lib/tcov.c */
2022
2023 ST_FUNC void tcc_tcov_block_end(TCCState *s1, int line);
2024
2025 ST_FUNC void tcc_tcov_block_begin(TCCState *s1)
2026 {
2027 SValue sv;
2028 void *ptr;
2029 unsigned long last_offset = tcov_data.offset;
2030
2031 tcc_tcov_block_end (tcc_state, 0);
2032 if (s1->test_coverage == 0 || nocode_wanted)
2033 return;
2034
2035 if (tcov_data.last_file_name == 0 ||
2036 strcmp ((const char *)(tcov_section->data + tcov_data.last_file_name),
2037 file->true_filename) != 0) {
2038 char wd[1024];
2039 CString cstr;
2040
2041 if (tcov_data.last_func_name)
2042 section_ptr_add(tcov_section, 1);
2043 if (tcov_data.last_file_name)
2044 section_ptr_add(tcov_section, 1);
2045 tcov_data.last_func_name = 0;
2046 cstr_new (&cstr);
2047 if (file->true_filename[0] == '/') {
2048 tcov_data.last_file_name = tcov_section->data_offset;
2049 cstr_printf (&cstr, "%s", file->true_filename);
2050 }
2051 else {
2052 getcwd (wd, sizeof(wd));
2053 tcov_data.last_file_name = tcov_section->data_offset + strlen(wd) + 1;
2054 cstr_printf (&cstr, "%s/%s", wd, file->true_filename);
2055 }
2056 ptr = section_ptr_add(tcov_section, cstr.size + 1);
2057 strcpy((char *)ptr, cstr.data);
2058 #ifdef _WIN32
2059 normalize_slashes((char *)ptr);
2060 #endif
2061 cstr_free (&cstr);
2062 }
2063 if (tcov_data.last_func_name == 0 ||
2064 strcmp ((const char *)(tcov_section->data + tcov_data.last_func_name),
2065 funcname) != 0) {
2066 size_t len;
2067
2068 if (tcov_data.last_func_name)
2069 section_ptr_add(tcov_section, 1);
2070 tcov_data.last_func_name = tcov_section->data_offset;
2071 len = strlen (funcname);
2072 ptr = section_ptr_add(tcov_section, len + 1);
2073 strcpy((char *)ptr, funcname);
2074 section_ptr_add(tcov_section, -tcov_section->data_offset & 7);
2075 ptr = section_ptr_add(tcov_section, 8);
2076 write64le (ptr, file->line_num);
2077 }
2078 if (ind == tcov_data.ind && tcov_data.line == file->line_num)
2079 tcov_data.offset = last_offset;
2080 else {
2081 Sym label = {0};
2082 label.type.t = VT_LLONG | VT_STATIC;
2083
2084 ptr = section_ptr_add(tcov_section, 16);
2085 tcov_data.line = file->line_num;
2086 write64le (ptr, (tcov_data.line << 8) | 0xff);
2087 put_extern_sym(&label, tcov_section,
2088 ((unsigned char *)ptr - tcov_section->data) + 8, 0);
2089 sv.type = label.type;
2090 sv.r = VT_SYM | VT_LVAL | VT_CONST;
2091 sv.r2 = VT_CONST;
2092 sv.c.i = 0;
2093 sv.sym = &label;
2094 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64 || \
2095 defined TCC_TARGET_ARM || defined TCC_TARGET_ARM64 || \
2096 defined TCC_TARGET_RISCV64
2097 gen_increment_tcov (&sv);
2098 #else
2099 vpushv(&sv);
2100 inc(0, TOK_INC);
2101 vpop();
2102 #endif
2103 tcov_data.offset = (unsigned char *)ptr - tcov_section->data;
2104 tcov_data.ind = ind;
2105 }
2106 }
2107
2108 ST_FUNC void tcc_tcov_block_end(TCCState *s1, int line)
2109 {
2110 if (s1->test_coverage == 0)
2111 return;
2112 if (line == -1)
2113 line = tcov_data.line;
2114 if (tcov_data.offset) {
2115 void *ptr = tcov_section->data + tcov_data.offset;
2116 unsigned long long nline = line ? line : file->line_num;
2117
2118 write64le (ptr, (read64le (ptr) & 0xfffffffffull) | (nline << 36));
2119 tcov_data.offset = 0;
2120 }
2121 }
2122
2123 ST_FUNC void tcc_tcov_check_line(TCCState *s1, int start)
2124 {
2125 if (s1->test_coverage == 0)
2126 return;
2127 if (tcov_data.line != file->line_num) {
2128 if ((tcov_data.line + 1) != file->line_num) {
2129 tcc_tcov_block_end (s1, -1);
2130 if (start)
2131 tcc_tcov_block_begin (s1);
2132 }
2133 else
2134 tcov_data.line = file->line_num;
2135 }
2136 }
2137
2138 ST_FUNC void tcc_tcov_start(TCCState *s1)
2139 {
2140 if (s1->test_coverage == 0)
2141 return;
2142 if (!s1->dState)
2143 s1->dState = tcc_mallocz(sizeof *s1->dState);
2144 memset (&tcov_data, 0, sizeof (tcov_data));
2145 if (tcov_section == NULL) {
2146 tcov_section = new_section(tcc_state, ".tcov", SHT_PROGBITS,
2147 SHF_ALLOC | SHF_WRITE);
2148 section_ptr_add(tcov_section, 4); // pointer to executable name
2149 }
2150 }
2151
2152 ST_FUNC void tcc_tcov_end(TCCState *s1)
2153 {
2154 if (s1->test_coverage == 0)
2155 return;
2156 if (tcov_data.last_func_name)
2157 section_ptr_add(tcov_section, 1);
2158 if (tcov_data.last_file_name)
2159 section_ptr_add(tcov_section, 1);
2160 }
2161
2162 ST_FUNC void tcc_tcov_reset_ind(TCCState *s1)
2163 {
2164 tcov_data.ind = 0;
2165 }
2166
2167 /* ------------------------------------------------------------------------- */
2168 #undef last_line_num
2169 #undef new_file
2170 #undef section_sym
2171 #undef debug_next_type
2172 #undef debug_hash
2173 #undef n_debug_hash
2174 #undef debug_anon_hash
2175 #undef n_debug_anon_hash
2176 #undef debug_info
2177 #undef debug_info_root
2178 #undef dwarf_sym
2179 #undef dwarf_line
2180 #undef dwarf_info
2181 #undef tcov_data
Tiny C Compiler main repository