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win32: pe dwarf sections & option -g.pdb
[tinycc.git] / tccdbg.c
blob56d878dfa7209bfaf1cafe23a2343675804b77a8
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 || !s1->dwarf || debug_info)
1249 return;
1250 if ((t->t & VT_BTYPE) == VT_STRUCT && t->ref->c != -1)
1251 for (i = 0; i < n_debug_anon_hash; i++)
1252 if (t->ref == debug_anon_hash[i].type) {
1253 Sym sym = {0}; sym .type = *t ;
1254
1255 /* Trick to not hash this struct */
1256 debug_info = (struct _debug_info *) t;
1257 debug_type = tcc_get_dwarf_info(s1, &sym);
1258 debug_info = NULL;
1259 for (j = 0; j < debug_anon_hash[i].n_debug_type; j++)
1260 write32le(dwarf_info_section->data +
1261 debug_anon_hash[i].debug_type[j],
1262 debug_type - dwarf_info.start);
1263 tcc_free(debug_anon_hash[i].debug_type);
1264 n_debug_anon_hash--;
1265 for (; i < n_debug_anon_hash; i++)
1266 debug_anon_hash[i] = debug_anon_hash[i + 1];
1267 }
1268 }
1269
1270 static int tcc_debug_add(TCCState *s1, Sym *t, int dwarf)
1271 {
1272 int offset = dwarf ? dwarf_info_section->data_offset : ++debug_next_type;
1273 debug_hash = (struct _debug_hash *)
1274 tcc_realloc (debug_hash,
1275 (n_debug_hash + 1) * sizeof(*debug_hash));
1276 debug_hash[n_debug_hash].debug_type = offset;
1277 debug_hash[n_debug_hash++].type = t;
1278 return offset;
1279 }
1280
1281 static void tcc_debug_remove(TCCState *s1, Sym *t)
1282 {
1283 int i;
1284
1285 for (i = 0; i < n_debug_hash; i++)
1286 if (t == debug_hash[i].type) {
1287 n_debug_hash--;
1288 for (; i < n_debug_hash; i++)
1289 debug_hash[i] = debug_hash[i+1];
1290 }
1291 }
1292
1293 #define STRUCT_NODEBUG(s) \
1294 (s->a.nodebug || \
1295 ((s->v & ~SYM_FIELD) >= SYM_FIRST_ANOM && \
1296 ((s->type.t & VT_BTYPE) == VT_BYTE || \
1297 (s->type.t & VT_BTYPE) == VT_BOOL || \
1298 (s->type.t & VT_BTYPE) == VT_SHORT || \
1299 (s->type.t & VT_BTYPE) == VT_INT || \
1300 (s->type.t & VT_BTYPE) == VT_LLONG)))
1301
1302 static void tcc_get_debug_info(TCCState *s1, Sym *s, CString *result)
1303 {
1304 int type;
1305 int n = 0;
1306 int debug_type = -1;
1307 Sym *t = s;
1308 CString str;
1309
1310 for (;;) {
1311 type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
1312 if ((type & VT_BTYPE) != VT_BYTE)
1313 type &= ~VT_DEFSIGN;
1314 if (type == VT_PTR || type == (VT_PTR | VT_ARRAY))
1315 n++, t = t->type.ref;
1316 else
1317 break;
1318 }
1319 if ((type & VT_BTYPE) == VT_STRUCT) {
1320 Sym *e = t;
1321
1322 t = t->type.ref;
1323 debug_type = tcc_debug_find(s1, t, 0);
1324 if (debug_type == -1) {
1325 debug_type = tcc_debug_add(s1, t, 0);
1326 cstr_new (&str);
1327 cstr_printf (&str, "%s:T%d=%c%d",
1328 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
1329 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL),
1330 debug_type,
1331 IS_UNION (t->type.t) ? 'u' : 's',
1332 t->c);
1333 while (t->next) {
1334 int pos, size, align;
1335
1336 t = t->next;
1337 if (STRUCT_NODEBUG(t))
1338 continue;
1339 cstr_printf (&str, "%s:",
1340 get_tok_str(t->v & ~SYM_FIELD, NULL));
1341 tcc_get_debug_info (s1, t, &str);
1342 if (t->type.t & VT_BITFIELD) {
1343 pos = t->c * 8 + BIT_POS(t->type.t);
1344 size = BIT_SIZE(t->type.t);
1345 }
1346 else {
1347 pos = t->c * 8;
1348 size = type_size(&t->type, &align) * 8;
1349 }
1350 cstr_printf (&str, ",%d,%d;", pos, size);
1351 }
1352 cstr_printf (&str, ";");
1353 tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0, 0);
1354 cstr_free (&str);
1355 if (debug_info)
1356 tcc_debug_remove(s1, e);
1357 }
1358 }
1359 else if (IS_ENUM(type)) {
1360 Sym *e = t = t->type.ref;
1361
1362 debug_type = tcc_debug_find(s1, t, 0);
1363 if (debug_type == -1) {
1364 debug_type = tcc_debug_add(s1, t, 0);
1365 cstr_new (&str);
1366 cstr_printf (&str, "%s:T%d=e",
1367 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
1368 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL),
1369 debug_type);
1370 while (t->next) {
1371 t = t->next;
1372 cstr_printf (&str, "%s:",
1373 (t->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
1374 ? "" : get_tok_str(t->v & ~SYM_FIELD, NULL));
1375 cstr_printf (&str, e->type.t & VT_UNSIGNED ? "%u," : "%d,",
1376 (int)t->enum_val);
1377 }
1378 cstr_printf (&str, ";");
1379 tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0, 0);
1380 cstr_free (&str);
1381 if (debug_info)
1382 tcc_debug_remove(s1, e);
1383 }
1384 }
1385 else if ((type & VT_BTYPE) != VT_FUNC) {
1386 type &= ~VT_STRUCT_MASK;
1387 for (debug_type = 1; debug_type <= N_DEFAULT_DEBUG; debug_type++)
1388 if (default_debug[debug_type - 1].type == type)
1389 break;
1390 if (debug_type > N_DEFAULT_DEBUG)
1391 return;
1392 }
1393 if (n > 0)
1394 cstr_printf (result, "%d=", ++debug_next_type);
1395 t = s;
1396 for (;;) {
1397 type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
1398 if ((type & VT_BTYPE) != VT_BYTE)
1399 type &= ~VT_DEFSIGN;
1400 if (type == VT_PTR)
1401 cstr_printf (result, "%d=*", ++debug_next_type);
1402 else if (type == (VT_PTR | VT_ARRAY))
1403 cstr_printf (result, "%d=ar1;0;%d;",
1404 ++debug_next_type, t->type.ref->c - 1);
1405 else if (type == VT_FUNC) {
1406 cstr_printf (result, "%d=f", ++debug_next_type);
1407 tcc_get_debug_info (s1, t->type.ref, result);
1408 return;
1409 }
1410 else
1411 break;
1412 t = t->type.ref;
1413 }
1414 cstr_printf (result, "%d", debug_type);
1415 }
1416
1417 static int tcc_get_dwarf_info(TCCState *s1, Sym *s)
1418 {
1419 int type;
1420 int debug_type = -1;
1421 Sym *e, *t = s;
1422 int i;
1423 int last_pos = -1;
1424 int retval;
1425
1426 if (new_file)
1427 put_new_file(s1);
1428 for (;;) {
1429 type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
1430 if ((type & VT_BTYPE) != VT_BYTE)
1431 type &= ~VT_DEFSIGN;
1432 if (type == VT_PTR || type == (VT_PTR | VT_ARRAY))
1433 t = t->type.ref;
1434 else
1435 break;
1436 }
1437 if ((type & VT_BTYPE) == VT_STRUCT) {
1438 t = t->type.ref;
1439 debug_type = tcc_debug_find(s1, t, 1);
1440 if (debug_type == -1) {
1441 int pos_sib = 0, i, *pos_type;
1442
1443 debug_type = tcc_debug_add(s1, t, 1);
1444 e = t;
1445 i = 0;
1446 while (e->next) {
1447 e = e->next;
1448 if (STRUCT_NODEBUG(e))
1449 continue;
1450 i++;
1451 }
1452 pos_type = (int *) tcc_malloc(i * sizeof(int));
1453 dwarf_data1(dwarf_info_section,
1454 IS_UNION (t->type.t)
1455 ? t->next ? DWARF_ABBREV_UNION_TYPE
1456 : DWARF_ABBREV_UNION_EMPTY_TYPE
1457 : t->next ? DWARF_ABBREV_STRUCTURE_TYPE
1458 : DWARF_ABBREV_STRUCTURE_EMPTY_TYPE);
1459 dwarf_strp(dwarf_info_section,
1460 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
1461 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL));
1462 dwarf_uleb128(dwarf_info_section, t->c);
1463 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1464 dwarf_uleb128(dwarf_info_section, file->line_num);
1465 if (t->next) {
1466 pos_sib = dwarf_info_section->data_offset;
1467 dwarf_data4(dwarf_info_section, 0);
1468 }
1469 e = t;
1470 i = 0;
1471 while (e->next) {
1472 e = e->next;
1473 if (STRUCT_NODEBUG(e))
1474 continue;
1475 dwarf_data1(dwarf_info_section,
1476 e->type.t & VT_BITFIELD ? DWARF_ABBREV_MEMBER_BF
1477 : DWARF_ABBREV_MEMBER);
1478 dwarf_strp(dwarf_info_section,
1479 get_tok_str(e->v & ~SYM_FIELD, NULL));
1480 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1481 dwarf_uleb128(dwarf_info_section, file->line_num);
1482 pos_type[i++] = dwarf_info_section->data_offset;
1483 dwarf_data4(dwarf_info_section, 0);
1484 if (e->type.t & VT_BITFIELD) {
1485 int pos = e->c * 8 + BIT_POS(e->type.t);
1486 int size = BIT_SIZE(e->type.t);
1487
1488 dwarf_uleb128(dwarf_info_section, size);
1489 dwarf_uleb128(dwarf_info_section, pos);
1490 }
1491 else
1492 dwarf_uleb128(dwarf_info_section, e->c);
1493 }
1494 if (t->next) {
1495 dwarf_data1(dwarf_info_section, 0);
1496 write32le(dwarf_info_section->data + pos_sib,
1497 dwarf_info_section->data_offset - dwarf_info.start);
1498 }
1499 e = t;
1500 i = 0;
1501 while (e->next) {
1502 e = e->next;
1503 if (STRUCT_NODEBUG(e))
1504 continue;
1505 type = tcc_get_dwarf_info(s1, e);
1506 tcc_debug_check_anon(s1, e, pos_type[i]);
1507 write32le(dwarf_info_section->data + pos_type[i++],
1508 type - dwarf_info.start);
1509 }
1510 tcc_free(pos_type);
1511 if (debug_info)
1512 tcc_debug_remove(s1, t);
1513 }
1514 }
1515 else if (IS_ENUM(type)) {
1516 t = t->type.ref;
1517 debug_type = tcc_debug_find(s1, t, 1);
1518 if (debug_type == -1) {
1519 int pos_sib, pos_type;
1520 Sym sym = {0}; sym.type.t = VT_INT | (type & VT_UNSIGNED);
1521
1522 pos_type = tcc_get_dwarf_info(s1, &sym);
1523 debug_type = tcc_debug_add(s1, t, 1);
1524 dwarf_data1(dwarf_info_section, DWARF_ABBREV_ENUMERATION_TYPE);
1525 dwarf_strp(dwarf_info_section,
1526 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
1527 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL));
1528 dwarf_data1(dwarf_info_section,
1529 type & VT_UNSIGNED ? DW_ATE_unsigned : DW_ATE_signed );
1530 dwarf_data1(dwarf_info_section, 4);
1531 dwarf_data4(dwarf_info_section, pos_type - dwarf_info.start);
1532 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1533 dwarf_uleb128(dwarf_info_section, file->line_num);
1534 pos_sib = dwarf_info_section->data_offset;
1535 dwarf_data4(dwarf_info_section, 0);
1536 e = t;
1537 while (e->next) {
1538 e = e->next;
1539 dwarf_data1(dwarf_info_section,
1540 type & VT_UNSIGNED ? DWARF_ABBREV_ENUMERATOR_UNSIGNED
1541 : DWARF_ABBREV_ENUMERATOR_SIGNED);
1542 dwarf_strp(dwarf_info_section,
1543 (e->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
1544 ? "" : get_tok_str(e->v & ~SYM_FIELD, NULL));
1545 if (type & VT_UNSIGNED)
1546 dwarf_uleb128(dwarf_info_section, e->enum_val);
1547 else
1548 dwarf_sleb128(dwarf_info_section, e->enum_val);
1549 }
1550 dwarf_data1(dwarf_info_section, 0);
1551 write32le(dwarf_info_section->data + pos_sib,
1552 dwarf_info_section->data_offset - dwarf_info.start);
1553 if (debug_info)
1554 tcc_debug_remove(s1, t);
1555 }
1556 }
1557 else if ((type & VT_BTYPE) != VT_FUNC) {
1558 type &= ~VT_STRUCT_MASK;
1559 for (i = 1; i <= N_DEFAULT_DEBUG; i++)
1560 if (default_debug[i - 1].type == type)
1561 break;
1562 if (i > N_DEFAULT_DEBUG)
1563 return 0;
1564 debug_type = dwarf_info.base_type_used[i - 1];
1565 if (debug_type == 0) {
1566 char name[100];
1567
1568 debug_type = dwarf_info_section->data_offset;
1569 dwarf_data1(dwarf_info_section, DWARF_ABBREV_BASE_TYPE);
1570 dwarf_uleb128(dwarf_info_section, default_debug[i - 1].size);
1571 dwarf_data1(dwarf_info_section, default_debug[i - 1].encoding);
1572 strncpy(name, default_debug[i - 1].name, sizeof(name) -1);
1573 *strchr(name, ':') = 0;
1574 dwarf_strp(dwarf_info_section, name);
1575 dwarf_info.base_type_used[i - 1] = debug_type;
1576 }
1577 }
1578 retval = debug_type;
1579 e = NULL;
1580 t = s;
1581 for (;;) {
1582 type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
1583 if ((type & VT_BTYPE) != VT_BYTE)
1584 type &= ~VT_DEFSIGN;
1585 if (type == VT_PTR) {
1586 i = dwarf_info_section->data_offset;
1587 if (retval == debug_type)
1588 retval = i;
1589 dwarf_data1(dwarf_info_section, DWARF_ABBREV_POINTER);
1590 dwarf_data1(dwarf_info_section, PTR_SIZE);
1591 if (last_pos != -1) {
1592 tcc_debug_check_anon(s1, e, last_pos);
1593 write32le(dwarf_info_section->data + last_pos,
1594 i - dwarf_info.start);
1595 }
1596 last_pos = dwarf_info_section->data_offset;
1597 e = t->type.ref;
1598 dwarf_data4(dwarf_info_section, 0);
1599 }
1600 else if (type == (VT_PTR | VT_ARRAY)) {
1601 int sib_pos, sub_type;
1602 #if LONG_SIZE == 4
1603 Sym sym = {0}; sym.type.t = VT_LONG | VT_INT | VT_UNSIGNED;
1604 #else
1605 Sym sym = {0}; sym.type.t = VT_LLONG | VT_LONG | VT_UNSIGNED;
1606 #endif
1607
1608 sub_type = tcc_get_dwarf_info(s1, &sym);
1609 i = dwarf_info_section->data_offset;
1610 if (retval == debug_type)
1611 retval = i;
1612 dwarf_data1(dwarf_info_section, DWARF_ABBREV_ARRAY_TYPE);
1613 if (last_pos != -1) {
1614 tcc_debug_check_anon(s1, e, last_pos);
1615 write32le(dwarf_info_section->data + last_pos,
1616 i - dwarf_info.start);
1617 }
1618 last_pos = dwarf_info_section->data_offset;
1619 e = t->type.ref;
1620 dwarf_data4(dwarf_info_section, 0);
1621 sib_pos = dwarf_info_section->data_offset;
1622 dwarf_data4(dwarf_info_section, 0);
1623 for (;;) {
1624 dwarf_data1(dwarf_info_section, DWARF_ABBREV_SUBRANGE_TYPE);
1625 dwarf_data4(dwarf_info_section, sub_type - dwarf_info.start);
1626 dwarf_uleb128(dwarf_info_section, t->type.ref->c - 1);
1627 s = t->type.ref;
1628 type = s->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE);
1629 if (type != (VT_PTR | VT_ARRAY))
1630 break;
1631 t = s;
1632 }
1633 dwarf_data1(dwarf_info_section, 0);
1634 write32le(dwarf_info_section->data + sib_pos,
1635 dwarf_info_section->data_offset - dwarf_info.start);
1636 }
1637 else if (type == VT_FUNC) {
1638 int sib_pos = 0, *pos_type;
1639 Sym *f;
1640
1641 i = dwarf_info_section->data_offset;
1642 debug_type = tcc_get_dwarf_info(s1, t->type.ref);
1643 if (retval == debug_type)
1644 retval = i;
1645 dwarf_data1(dwarf_info_section,
1646 t->type.ref->next ? DWARF_ABBREV_SUBROUTINE_TYPE
1647 : DWARF_ABBREV_SUBROUTINE_EMPTY_TYPE);
1648 if (last_pos != -1) {
1649 tcc_debug_check_anon(s1, e, last_pos);
1650 write32le(dwarf_info_section->data + last_pos,
1651 i - dwarf_info.start);
1652 }
1653 last_pos = dwarf_info_section->data_offset;
1654 e = t->type.ref;
1655 dwarf_data4(dwarf_info_section, 0);
1656 if (t->type.ref->next) {
1657 sib_pos = dwarf_info_section->data_offset;
1658 dwarf_data4(dwarf_info_section, 0);
1659 }
1660 f = t->type.ref;
1661 i = 0;
1662 while (f->next) {
1663 f = f->next;
1664 i++;
1665 }
1666 pos_type = (int *) tcc_malloc(i * sizeof(int));
1667 f = t->type.ref;
1668 i = 0;
1669 while (f->next) {
1670 f = f->next;
1671 dwarf_data1(dwarf_info_section, DWARF_ABBREV_FORMAL_PARAMETER2);
1672 pos_type[i++] = dwarf_info_section->data_offset;
1673 dwarf_data4(dwarf_info_section, 0);
1674 }
1675 if (t->type.ref->next) {
1676 dwarf_data1(dwarf_info_section, 0);
1677 write32le(dwarf_info_section->data + sib_pos,
1678 dwarf_info_section->data_offset - dwarf_info.start);
1679 }
1680 f = t->type.ref;
1681 i = 0;
1682 while (f->next) {
1683 f = f->next;
1684 type = tcc_get_dwarf_info(s1, f);
1685 tcc_debug_check_anon(s1, f, pos_type[i]);
1686 write32le(dwarf_info_section->data + pos_type[i++],
1687 type - dwarf_info.start);
1688 }
1689 tcc_free(pos_type);
1690 }
1691 else {
1692 if (last_pos != -1) {
1693 tcc_debug_check_anon(s1, e, last_pos);
1694 write32le(dwarf_info_section->data + last_pos,
1695 debug_type - dwarf_info.start);
1696 }
1697 break;
1698 }
1699 t = t->type.ref;
1700 }
1701 return retval;
1702 }
1703
1704 static void tcc_debug_finish (TCCState *s1, struct _debug_info *cur)
1705 {
1706 while (cur) {
1707 struct _debug_info *next = cur->next;
1708 int i;
1709
1710 if (s1->dwarf) {
1711
1712 for (i = cur->n_sym - 1; i >= 0; i--) {
1713 struct debug_sym *s = &cur->sym[i];
1714
1715 dwarf_data1(dwarf_info_section,
1716 s->type == N_PSYM
1717 ? DWARF_ABBREV_FORMAL_PARAMETER
1718 : s->type == N_GSYM
1719 ? DWARF_ABBREV_VARIABLE_EXTERNAL
1720 : s->type == N_STSYM
1721 ? DWARF_ABBREV_VARIABLE_STATIC
1722 : DWARF_ABBREV_VARIABLE_LOCAL);
1723 dwarf_strp(dwarf_info_section, s->str);
1724 if (s->type == N_GSYM || s->type == N_STSYM) {
1725 dwarf_uleb128(dwarf_info_section, s->file);
1726 dwarf_uleb128(dwarf_info_section, s->line);
1727 }
1728 dwarf_data4(dwarf_info_section, s->info - dwarf_info.start);
1729 if (s->type == N_GSYM || s->type == N_STSYM) {
1730 /* global/static */
1731 if (s->type == N_GSYM)
1732 dwarf_data1(dwarf_info_section, 1);
1733 dwarf_data1(dwarf_info_section, PTR_SIZE + 1);
1734 dwarf_data1(dwarf_info_section, DW_OP_addr);
1735 if (s->type == N_STSYM)
1736 dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
1737 #if PTR_SIZE == 4
1738 dwarf_data4(dwarf_info_section, s->value);
1739 #else
1740 dwarf_data8(dwarf_info_section, s->value);
1741 #endif
1742 }
1743 else {
1744 /* param/local */
1745 dwarf_data1(dwarf_info_section, dwarf_sleb128_size(s->value) + 1);
1746 dwarf_data1(dwarf_info_section, DW_OP_fbreg);
1747 dwarf_sleb128(dwarf_info_section, s->value);
1748 }
1749 tcc_free (s->str);
1750 }
1751 tcc_free (cur->sym);
1752 dwarf_data1(dwarf_info_section,
1753 cur->child ? DWARF_ABBREV_LEXICAL_BLOCK
1754 : DWARF_ABBREV_LEXICAL_EMPTY_BLOCK);
1755 dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
1756 #if PTR_SIZE == 4
1757 dwarf_data4(dwarf_info_section, func_ind + cur->start);
1758 dwarf_data4(dwarf_info_section, cur->end - cur->start);
1759 #else
1760 dwarf_data8(dwarf_info_section, func_ind + cur->start);
1761 dwarf_data8(dwarf_info_section, cur->end - cur->start);
1762 #endif
1763 tcc_debug_finish (s1, cur->child);
1764 if (cur->child)
1765 dwarf_data1(dwarf_info_section, 0);
1766 }
1767 else
1768 {
1769 for (i = 0; i < cur->n_sym; i++) {
1770 struct debug_sym *s = &cur->sym[i];
1771
1772 if (s->sec)
1773 put_stabs_r(s1, s->str, s->type, 0, 0, s->value,
1774 s->sec, s->sym_index);
1775 else
1776 put_stabs(s1, s->str, s->type, 0, 0, s->value);
1777 tcc_free (s->str);
1778 }
1779 tcc_free (cur->sym);
1780 put_stabn(s1, N_LBRAC, 0, 0, cur->start);
1781 tcc_debug_finish (s1, cur->child);
1782 put_stabn(s1, N_RBRAC, 0, 0, cur->end);
1783 }
1784 tcc_free (cur);
1785 cur = next;
1786 }
1787 }
1788
1789 ST_FUNC void tcc_add_debug_info(TCCState *s1, int param, Sym *s, Sym *e)
1790 {
1791 CString debug_str;
1792 if (!s1->do_debug)
1793 return;
1794 cstr_new (&debug_str);
1795 for (; s != e; s = s->prev) {
1796 if (!s->v || (s->r & VT_VALMASK) != VT_LOCAL)
1797 continue;
1798 if (s1->dwarf) {
1799 tcc_debug_stabs(s1, get_tok_str(s->v, NULL),
1800 param ? N_PSYM : N_LSYM, s->c, NULL, 0,
1801 tcc_get_dwarf_info(s1, s));
1802 }
1803 else
1804 {
1805 cstr_reset (&debug_str);
1806 cstr_printf (&debug_str, "%s:%s", get_tok_str(s->v, NULL),
1807 param ? "p" : "");
1808 tcc_get_debug_info(s1, s, &debug_str);
1809 tcc_debug_stabs(s1, debug_str.data, param ? N_PSYM : N_LSYM,
1810 s->c, NULL, 0, 0);
1811 }
1812 }
1813 cstr_free (&debug_str);
1814 }
1815
1816 /* put function symbol */
1817 ST_FUNC void tcc_debug_funcstart(TCCState *s1, Sym *sym)
1818 {
1819 CString debug_str;
1820 BufferedFile *f;
1821
1822 if (!s1->do_debug)
1823 return;
1824 debug_info_root = NULL;
1825 debug_info = NULL;
1826 tcc_debug_stabn(s1, N_LBRAC, ind - func_ind);
1827 f = put_new_file(s1);
1828 if (!f)
1829 return;
1830
1831 if (s1->dwarf) {
1832 tcc_debug_line(s1);
1833 dwarf_info.func = sym;
1834 dwarf_info.line = file->line_num;
1835 if (s1->do_backtrace) {
1836 int i, len;
1837
1838 dwarf_line_op(s1, 0); // extended
1839 dwarf_uleb128_op(s1, strlen(funcname) + 2);
1840 dwarf_line_op(s1, DW_LNE_hi_user - 1);
1841 len = strlen(funcname) + 1;
1842 for (i = 0; i < len; i++)
1843 dwarf_line_op(s1, funcname[i]);
1844 }
1845 }
1846 else
1847 {
1848 cstr_new (&debug_str);
1849 cstr_printf(&debug_str, "%s:%c", funcname, sym->type.t & VT_STATIC ? 'f' : 'F');
1850 tcc_get_debug_info(s1, sym->type.ref, &debug_str);
1851 put_stabs_r(s1, debug_str.data, N_FUN, 0, f->line_num, 0, cur_text_section, sym->c);
1852 cstr_free (&debug_str);
1853 tcc_debug_line(s1);
1854 }
1855 }
1856
1857 ST_FUNC void tcc_debug_prolog_epilog(TCCState *s1, int value)
1858 {
1859 if (!s1->do_debug)
1860 return;
1861 if (s1->dwarf) {
1862 dwarf_line_op(s1, value == 0 ? DW_LNS_set_prologue_end
1863 : DW_LNS_set_epilogue_begin);
1864 }
1865 }
1866
1867 /* put function size */
1868 ST_FUNC void tcc_debug_funcend(TCCState *s1, int size)
1869 {
1870 /* lldb does not like function end and next function start at same pc */
1871 int min_instr_len;
1872
1873 if (!s1->do_debug)
1874 return;
1875 min_instr_len = dwarf_line.last_pc == ind ? 0 : DWARF_MIN_INSTR_LEN;
1876 ind -= min_instr_len;
1877 tcc_debug_line(s1);
1878 ind += min_instr_len;
1879 tcc_debug_stabn(s1, N_RBRAC, size);
1880 if (s1->dwarf) {
1881 int func_sib = 0;
1882 Sym *sym = dwarf_info.func;
1883 int n_debug_info = tcc_get_dwarf_info(s1, sym->type.ref);
1884
1885 dwarf_data1(dwarf_info_section,
1886 sym->type.t & VT_STATIC ? DWARF_ABBREV_SUBPROGRAM_STATIC
1887 : DWARF_ABBREV_SUBPROGRAM_EXTERNAL);
1888 if ((sym->type.t & VT_STATIC) == 0)
1889 dwarf_data1(dwarf_info_section, 1);
1890 dwarf_strp(dwarf_info_section, funcname);
1891 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1892 dwarf_uleb128(dwarf_info_section, dwarf_info.line);
1893 tcc_debug_check_anon(s1, sym->type.ref, dwarf_info_section->data_offset);
1894 dwarf_data4(dwarf_info_section, n_debug_info - dwarf_info.start);
1895 dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
1896 #if PTR_SIZE == 4
1897 dwarf_data4(dwarf_info_section, func_ind); // low_pc
1898 dwarf_data4(dwarf_info_section, size); // high_pc
1899 #else
1900 dwarf_data8(dwarf_info_section, func_ind); // low_pc
1901 dwarf_data8(dwarf_info_section, size); // high_pc
1902 #endif
1903 func_sib = dwarf_info_section->data_offset;
1904 dwarf_data4(dwarf_info_section, 0); // sibling
1905 dwarf_data1(dwarf_info_section, 1);
1906 #if defined(TCC_TARGET_I386)
1907 dwarf_data1(dwarf_info_section, DW_OP_reg5); // ebp
1908 #elif defined(TCC_TARGET_X86_64)
1909 dwarf_data1(dwarf_info_section, DW_OP_reg6); // rbp
1910 #elif defined TCC_TARGET_ARM
1911 dwarf_data1(dwarf_info_section, DW_OP_reg13); // sp
1912 #elif defined TCC_TARGET_ARM64
1913 dwarf_data1(dwarf_info_section, DW_OP_reg29); // reg 29
1914 #elif defined TCC_TARGET_RISCV64
1915 dwarf_data1(dwarf_info_section, DW_OP_reg8); // r8(s0)
1916 #else
1917 dwarf_data1(dwarf_info_section, DW_OP_call_frame_cfa);
1918 #endif
1919 tcc_debug_finish (s1, debug_info_root);
1920 dwarf_data1(dwarf_info_section, 0);
1921 write32le(dwarf_info_section->data + func_sib,
1922 dwarf_info_section->data_offset - dwarf_info.start);
1923 }
1924 else
1925 {
1926 tcc_debug_finish (s1, debug_info_root);
1927 }
1928 debug_info_root = 0;
1929 }
1930
1931
1932 ST_FUNC void tcc_debug_extern_sym(TCCState *s1, Sym *sym, int sh_num, int sym_bind, int sym_type)
1933 {
1934 if (!s1->do_debug)
1935 return;
1936 if (sym_type == STT_FUNC || sym->v >= SYM_FIRST_ANOM)
1937 return;
1938 if (s1->dwarf) {
1939 int debug_type;
1940
1941 debug_type = tcc_get_dwarf_info(s1, sym);
1942 dwarf_data1(dwarf_info_section,
1943 sym_bind == STB_GLOBAL
1944 ? DWARF_ABBREV_VARIABLE_EXTERNAL
1945 : DWARF_ABBREV_VARIABLE_STATIC);
1946 dwarf_strp(dwarf_info_section, get_tok_str(sym->v, NULL));
1947 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1948 dwarf_uleb128(dwarf_info_section, file->line_num);
1949 tcc_debug_check_anon(s1, sym, dwarf_info_section->data_offset);
1950 dwarf_data4(dwarf_info_section, debug_type - dwarf_info.start);
1951 if (sym_bind == STB_GLOBAL)
1952 dwarf_data1(dwarf_info_section, 1);
1953 dwarf_data1(dwarf_info_section, PTR_SIZE + 1);
1954 dwarf_data1(dwarf_info_section, DW_OP_addr);
1955 greloca(dwarf_info_section, sym, dwarf_info_section->data_offset,
1956 R_DATA_PTR, 0);
1957 #if PTR_SIZE == 4
1958 dwarf_data4(dwarf_info_section, 0);
1959 #else
1960 dwarf_data8(dwarf_info_section, 0);
1961 #endif
1962 }
1963 else
1964 {
1965 Section *s = sh_num == SHN_COMMON ? common_section
1966 : s1->sections[sh_num];
1967 CString str;
1968
1969 cstr_new (&str);
1970 cstr_printf (&str, "%s:%c",
1971 get_tok_str(sym->v, NULL),
1972 sym_bind == STB_GLOBAL ? 'G' : func_ind != -1 ? 'V' : 'S'
1973 );
1974 tcc_get_debug_info(s1, sym, &str);
1975 if (sym_bind == STB_GLOBAL)
1976 tcc_debug_stabs(s1, str.data, N_GSYM, 0, NULL, 0, 0);
1977 else
1978 tcc_debug_stabs(s1, str.data,
1979 (sym->type.t & VT_STATIC) && data_section == s
1980 ? N_STSYM : N_LCSYM, 0, s, sym->c, 0);
1981 cstr_free (&str);
1982 }
1983 }
1984
1985 ST_FUNC void tcc_debug_typedef(TCCState *s1, Sym *sym)
1986 {
1987 if (!s1->do_debug)
1988 return;
1989 if (s1->dwarf) {
1990 int debug_type;
1991
1992 debug_type = tcc_get_dwarf_info(s1, sym);
1993 if (debug_type != -1) {
1994 dwarf_data1(dwarf_info_section, DWARF_ABBREV_TYPEDEF);
1995 dwarf_strp(dwarf_info_section, get_tok_str(sym->v & ~SYM_FIELD, NULL));
1996 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1997 dwarf_uleb128(dwarf_info_section, file->line_num);
1998 tcc_debug_check_anon(s1, sym, dwarf_info_section->data_offset);
1999 dwarf_data4(dwarf_info_section, debug_type - dwarf_info.start);
2000 }
2001 }
2002 else
2003 {
2004 CString str;
2005 cstr_new (&str);
2006 cstr_printf (&str, "%s:t",
2007 (sym->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
2008 ? "" : get_tok_str(sym->v & ~SYM_FIELD, NULL));
2009 tcc_get_debug_info(s1, sym, &str);
2010 tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0, 0);
2011 cstr_free (&str);
2012 }
2013 }
2014
2015 /* ------------------------------------------------------------------------- */
2016 /* for section layout see lib/tcov.c */
2017
2018 ST_FUNC void tcc_tcov_block_end(TCCState *s1, int line);
2019
2020 ST_FUNC void tcc_tcov_block_begin(TCCState *s1)
2021 {
2022 SValue sv;
2023 void *ptr;
2024 unsigned long last_offset = tcov_data.offset;
2025
2026 tcc_tcov_block_end (tcc_state, 0);
2027 if (s1->test_coverage == 0 || nocode_wanted)
2028 return;
2029
2030 if (tcov_data.last_file_name == 0 ||
2031 strcmp ((const char *)(tcov_section->data + tcov_data.last_file_name),
2032 file->true_filename) != 0) {
2033 char wd[1024];
2034 CString cstr;
2035
2036 if (tcov_data.last_func_name)
2037 section_ptr_add(tcov_section, 1);
2038 if (tcov_data.last_file_name)
2039 section_ptr_add(tcov_section, 1);
2040 tcov_data.last_func_name = 0;
2041 cstr_new (&cstr);
2042 if (file->true_filename[0] == '/') {
2043 tcov_data.last_file_name = tcov_section->data_offset;
2044 cstr_printf (&cstr, "%s", file->true_filename);
2045 }
2046 else {
2047 getcwd (wd, sizeof(wd));
2048 tcov_data.last_file_name = tcov_section->data_offset + strlen(wd) + 1;
2049 cstr_printf (&cstr, "%s/%s", wd, file->true_filename);
2050 }
2051 ptr = section_ptr_add(tcov_section, cstr.size + 1);
2052 strcpy((char *)ptr, cstr.data);
2053 #ifdef _WIN32
2054 normalize_slashes((char *)ptr);
2055 #endif
2056 cstr_free (&cstr);
2057 }
2058 if (tcov_data.last_func_name == 0 ||
2059 strcmp ((const char *)(tcov_section->data + tcov_data.last_func_name),
2060 funcname) != 0) {
2061 size_t len;
2062
2063 if (tcov_data.last_func_name)
2064 section_ptr_add(tcov_section, 1);
2065 tcov_data.last_func_name = tcov_section->data_offset;
2066 len = strlen (funcname);
2067 ptr = section_ptr_add(tcov_section, len + 1);
2068 strcpy((char *)ptr, funcname);
2069 section_ptr_add(tcov_section, -tcov_section->data_offset & 7);
2070 ptr = section_ptr_add(tcov_section, 8);
2071 write64le (ptr, file->line_num);
2072 }
2073 if (ind == tcov_data.ind && tcov_data.line == file->line_num)
2074 tcov_data.offset = last_offset;
2075 else {
2076 Sym label = {0};
2077 label.type.t = VT_LLONG | VT_STATIC;
2078
2079 ptr = section_ptr_add(tcov_section, 16);
2080 tcov_data.line = file->line_num;
2081 write64le (ptr, (tcov_data.line << 8) | 0xff);
2082 put_extern_sym(&label, tcov_section,
2083 ((unsigned char *)ptr - tcov_section->data) + 8, 0);
2084 sv.type = label.type;
2085 sv.r = VT_SYM | VT_LVAL | VT_CONST;
2086 sv.r2 = VT_CONST;
2087 sv.c.i = 0;
2088 sv.sym = &label;
2089 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64 || \
2090 defined TCC_TARGET_ARM || defined TCC_TARGET_ARM64 || \
2091 defined TCC_TARGET_RISCV64
2092 gen_increment_tcov (&sv);
2093 #else
2094 vpushv(&sv);
2095 inc(0, TOK_INC);
2096 vpop();
2097 #endif
2098 tcov_data.offset = (unsigned char *)ptr - tcov_section->data;
2099 tcov_data.ind = ind;
2100 }
2101 }
2102
2103 ST_FUNC void tcc_tcov_block_end(TCCState *s1, int line)
2104 {
2105 if (s1->test_coverage == 0)
2106 return;
2107 if (line == -1)
2108 line = tcov_data.line;
2109 if (tcov_data.offset) {
2110 void *ptr = tcov_section->data + tcov_data.offset;
2111 unsigned long long nline = line ? line : file->line_num;
2112
2113 write64le (ptr, (read64le (ptr) & 0xfffffffffull) | (nline << 36));
2114 tcov_data.offset = 0;
2115 }
2116 }
2117
2118 ST_FUNC void tcc_tcov_check_line(TCCState *s1, int start)
2119 {
2120 if (s1->test_coverage == 0)
2121 return;
2122 if (tcov_data.line != file->line_num) {
2123 if ((tcov_data.line + 1) != file->line_num) {
2124 tcc_tcov_block_end (s1, -1);
2125 if (start)
2126 tcc_tcov_block_begin (s1);
2127 }
2128 else
2129 tcov_data.line = file->line_num;
2130 }
2131 }
2132
2133 ST_FUNC void tcc_tcov_start(TCCState *s1)
2134 {
2135 if (s1->test_coverage == 0)
2136 return;
2137 if (!s1->dState)
2138 s1->dState = tcc_mallocz(sizeof *s1->dState);
2139 memset (&tcov_data, 0, sizeof (tcov_data));
2140 if (tcov_section == NULL) {
2141 tcov_section = new_section(tcc_state, ".tcov", SHT_PROGBITS,
2142 SHF_ALLOC | SHF_WRITE);
2143 section_ptr_add(tcov_section, 4); // pointer to executable name
2144 }
2145 }
2146
2147 ST_FUNC void tcc_tcov_end(TCCState *s1)
2148 {
2149 if (s1->test_coverage == 0)
2150 return;
2151 if (tcov_data.last_func_name)
2152 section_ptr_add(tcov_section, 1);
2153 if (tcov_data.last_file_name)
2154 section_ptr_add(tcov_section, 1);
2155 }
2156
2157 ST_FUNC void tcc_tcov_reset_ind(TCCState *s1)
2158 {
2159 tcov_data.ind = 0;
2160 }
2161
2162 /* ------------------------------------------------------------------------- */
2163 #undef last_line_num
2164 #undef new_file
2165 #undef section_sym
2166 #undef debug_next_type
2167 #undef debug_hash
2168 #undef n_debug_hash
2169 #undef debug_anon_hash
2170 #undef n_debug_anon_hash
2171 #undef debug_info
2172 #undef debug_info_root
2173 #undef dwarf_sym
2174 #undef dwarf_line
2175 #undef dwarf_info
2176 #undef tcov_data
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