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[tinycc.git] / tccdbg.c
blobd5bfbb776861e7fb5530d2e2b4b996647b49f719
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
574 if (!strcmp(file->filename, "<command line>")) {
575 dwarf_line.cur_file = 1;
576 return;
577 }
578 filename = strrchr(file->filename, '/');
579 if (filename == NULL) {
580 for (i = 1; i < dwarf_line.filename_size; i++)
581 if (dwarf_line.filename_table[i].dir_entry == 0 &&
582 strcmp(dwarf_line.filename_table[i].name,
583 file->filename) == 0) {
584 dwarf_line.cur_file = i;
585 return;
586 }
587 i = 0;
588 filename = file->filename;
589 }
590 else {
591 char *undo = filename;
592 char *dir = file->filename;
593
594 *filename++ = '\0';
595 for (i = 0; i < dwarf_line.dir_size; i++)
596 if (strcmp(dwarf_line.dir_table[i], dir) == 0) {
597 for (j = 1; j < dwarf_line.filename_size; j++)
598 if (dwarf_line.filename_table[j].dir_entry == i &&
599 strcmp(dwarf_line.filename_table[j].name,
600 filename) == 0) {
601 *undo = '/';
602 dwarf_line.cur_file = j;
603 return;
604 }
605 break;
606 }
607 if (i == dwarf_line.dir_size) {
608 dwarf_line.dir_size++;
609 dwarf_line.dir_table =
610 (char **) tcc_realloc(dwarf_line.dir_table,
611 dwarf_line.dir_size *
612 sizeof (char *));
613 dwarf_line.dir_table[i] = tcc_strdup(dir);
614 }
615 *undo = '/';
616 }
617 dwarf_line.filename_table =
618 (struct dwarf_filename_struct *)
619 tcc_realloc(dwarf_line.filename_table,
620 (dwarf_line.filename_size + 1) *
621 sizeof (struct dwarf_filename_struct));
622 dwarf_line.filename_table[dwarf_line.filename_size].dir_entry = i;
623 dwarf_line.filename_table[dwarf_line.filename_size].name =
624 tcc_strdup(filename);
625 dwarf_line.cur_file = dwarf_line.filename_size++;
626 return;
627 }
628
629 #if 0
630 static int dwarf_uleb128_size (unsigned long long value)
631 {
632 int size = 0;
633
634 do {
635 value >>= 7;
636 size++;
637 } while (value != 0);
638 return size;
639 }
640 #endif
641
642 static int dwarf_sleb128_size (long long value)
643 {
644 int size = 0;
645 long long end = value >> 63;
646 unsigned char last = end & 0x40;
647 unsigned char byte;
648
649 do {
650 byte = value & 0x7f;
651 value >>= 7;
652 size++;
653 } while (value != end || (byte & 0x40) != last);
654 return size;
655 }
656
657 static void dwarf_uleb128 (Section *s, unsigned long long value)
658 {
659 do {
660 unsigned char byte = value & 0x7f;
661
662 value >>= 7;
663 dwarf_data1(s, byte | (value ? 0x80 : 0));
664 } while (value != 0);
665 }
666
667 static void dwarf_sleb128 (Section *s, long long value)
668 {
669 int more;
670 long long end = value >> 63;
671 unsigned char last = end & 0x40;
672
673 do {
674 unsigned char byte = value & 0x7f;
675
676 value >>= 7;
677 more = value != end || (byte & 0x40) != last;
678 dwarf_data1(s, byte | (0x80 * more));
679 } while (more);
680 }
681
682 static void dwarf_uleb128_op (TCCState *s1, unsigned long long value)
683 {
684 do {
685 unsigned char byte = value & 0x7f;
686
687 value >>= 7;
688 dwarf_line_op(s1, byte | (value ? 0x80 : 0));
689 } while (value != 0);
690 }
691
692 static void dwarf_sleb128_op (TCCState *s1, long long value)
693 {
694 int more;
695 long long end = value >> 63;
696 unsigned char last = end & 0x40;
697
698 do {
699 unsigned char byte = value & 0x7f;
700
701 value >>= 7;
702 more = value != end || (byte & 0x40) != last;
703 dwarf_line_op(s1, byte | (0x80 * more));
704 } while (more);
705 }
706
707 /* start of translation unit info */
708 ST_FUNC void tcc_debug_start(TCCState *s1)
709 {
710 int i;
711 char buf[512];
712 char *filename;
713
714 /* an elf symbol of type STT_FILE must be put so that STB_LOCAL
715 symbols can be safely used */
716 filename = file->prev ? file->prev->filename : file->filename;
717 put_elf_sym(symtab_section, 0, 0,
718 ELFW(ST_INFO)(STB_LOCAL, STT_FILE), 0,
719 SHN_ABS, filename);
720
721 if (s1->do_debug) {
722
723 new_file = last_line_num = 0;
724 debug_next_type = N_DEFAULT_DEBUG;
725 debug_hash = NULL;
726 debug_anon_hash = NULL;
727 n_debug_hash = 0;
728 n_debug_anon_hash = 0;
729
730 getcwd(buf, sizeof(buf));
731 #ifdef _WIN32
732 normalize_slashes(buf);
733 #endif
734
735 if (s1->dwarf) {
736 int start_abbrev;
737 unsigned char *ptr;
738 char *undo;
739
740 /* dwarf_abbrev */
741 start_abbrev = dwarf_abbrev_section->data_offset;
742 ptr = section_ptr_add(dwarf_abbrev_section, sizeof(dwarf_abbrev_init));
743 memcpy(ptr, dwarf_abbrev_init, sizeof(dwarf_abbrev_init));
744
745 if (s1->dwarf < 5) {
746 while (*ptr) {
747 ptr += 3;
748 while (*ptr) {
749 if (ptr[1] == DW_FORM_line_strp)
750 ptr[1] = DW_FORM_strp;
751 if (s1->dwarf < 4) {
752 /* These are compatable for DW_TAG_compile_unit
753 DW_AT_stmt_list. */
754 if (ptr[1] == DW_FORM_sec_offset)
755 ptr[1] = DW_FORM_data4;
756 /* This code uses only size < 0x80 so these are
757 compatible. */
758 if (ptr[1] == DW_FORM_exprloc)
759 ptr[1] = DW_FORM_block1;
760 }
761 ptr += 2;
762 }
763 ptr += 2;
764 }
765 }
766
767 dwarf_sym.info = dwarf_get_section_sym(dwarf_info_section);
768 dwarf_sym.abbrev = dwarf_get_section_sym(dwarf_abbrev_section);
769 dwarf_sym.line = dwarf_get_section_sym(dwarf_line_section);
770 dwarf_sym.str = dwarf_get_section_sym(dwarf_str_section);
771 if (tcc_state->dwarf >= 5)
772 dwarf_sym.line_str = dwarf_get_section_sym(dwarf_line_str_section);
773 else {
774 dwarf_line_str_section = dwarf_str_section;
775 dwarf_sym.line_str = dwarf_sym.str;
776 }
777 section_sym = dwarf_get_section_sym(text_section);
778
779 /* dwarf_info */
780 dwarf_info.start = dwarf_info_section->data_offset;
781 dwarf_data4(dwarf_info_section, 0); // size
782 dwarf_data2(dwarf_info_section, s1->dwarf); // version
783 if (s1->dwarf >= 5) {
784 dwarf_data1(dwarf_info_section, DW_UT_compile); // unit type
785 dwarf_data1(dwarf_info_section, PTR_SIZE);
786 dwarf_reloc(dwarf_info_section, dwarf_sym.abbrev, R_DATA_32DW);
787 dwarf_data4(dwarf_info_section, start_abbrev);
788 }
789 else {
790 dwarf_reloc(dwarf_info_section, dwarf_sym.abbrev, R_DATA_32DW);
791 dwarf_data4(dwarf_info_section, start_abbrev);
792 dwarf_data1(dwarf_info_section, PTR_SIZE);
793 }
794
795 dwarf_data1(dwarf_info_section, DWARF_ABBREV_COMPILE_UNIT);
796 dwarf_strp(dwarf_info_section, "tcc " TCC_VERSION);
797 dwarf_data1(dwarf_info_section, DW_LANG_C11);
798 dwarf_line_strp(dwarf_info_section, filename);
799 dwarf_line_strp(dwarf_info_section, buf);
800 dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
801 #if PTR_SIZE == 4
802 dwarf_data4(dwarf_info_section, ind); // low pc
803 dwarf_data4(dwarf_info_section, 0); // high pc
804 #else
805 dwarf_data8(dwarf_info_section, ind); // low pc
806 dwarf_data8(dwarf_info_section, 0); // high pc
807 #endif
808 dwarf_reloc(dwarf_info_section, dwarf_sym.line, R_DATA_32DW);
809 dwarf_data4(dwarf_info_section, dwarf_line_section->data_offset); // stmt_list
810
811 /* dwarf_line */
812 dwarf_line.start = dwarf_line_section->data_offset;
813 dwarf_data4(dwarf_line_section, 0); // length
814 dwarf_data2(dwarf_line_section, s1->dwarf); // version
815 if (s1->dwarf >= 5) {
816 dwarf_data1(dwarf_line_section, PTR_SIZE); // address size
817 dwarf_data1(dwarf_line_section, 0); // segment selector
818 }
819 dwarf_data4(dwarf_line_section, 0); // prologue Length
820 dwarf_data1(dwarf_line_section, DWARF_MIN_INSTR_LEN);
821 if (s1->dwarf >= 4)
822 dwarf_data1(dwarf_line_section, 1); // maximum ops per instruction
823 dwarf_data1(dwarf_line_section, 1); // Initial value of 'is_stmt'
824 dwarf_data1(dwarf_line_section, DWARF_LINE_BASE);
825 dwarf_data1(dwarf_line_section, DWARF_LINE_RANGE);
826 dwarf_data1(dwarf_line_section, DWARF_OPCODE_BASE);
827 ptr = section_ptr_add(dwarf_line_section, sizeof(dwarf_line_opcodes));
828 memcpy(ptr, dwarf_line_opcodes, sizeof(dwarf_line_opcodes));
829 undo = strrchr(filename, '/');
830 if (undo)
831 *undo = 0;
832 dwarf_line.dir_size = 1 + (undo != NULL);
833 dwarf_line.dir_table = (char **) tcc_malloc(sizeof (char *) *
834 dwarf_line.dir_size);
835 dwarf_line.dir_table[0] = tcc_strdup(buf);
836 if (undo)
837 dwarf_line.dir_table[1] = tcc_strdup(filename);
838 dwarf_line.filename_size = 2;
839 dwarf_line.filename_table =
840 (struct dwarf_filename_struct *)
841 tcc_malloc(2*sizeof (struct dwarf_filename_struct));
842 dwarf_line.filename_table[0].dir_entry = 0;
843 if (undo) {
844 dwarf_line.filename_table[0].name = tcc_strdup(undo + 1);
845 dwarf_line.filename_table[1].dir_entry = 1;
846 dwarf_line.filename_table[1].name = tcc_strdup(undo + 1);
847 *undo = '/';
848 }
849 else {
850 dwarf_line.filename_table[0].name = tcc_strdup(filename);
851 dwarf_line.filename_table[1].dir_entry = 0;
852 dwarf_line.filename_table[1].name = tcc_strdup(filename);
853 }
854 dwarf_line.line_size = dwarf_line.line_max_size = 0;
855 dwarf_line.line_data = NULL;
856 dwarf_line.cur_file = 1;
857 dwarf_line.last_file = 0;
858 dwarf_line.last_pc = 0;
859 dwarf_line.last_line = 1;
860 dwarf_line_op(s1, 0); // extended
861 dwarf_uleb128_op(s1, 1 + PTR_SIZE); // extended size
862 dwarf_line_op(s1, DW_LNE_set_address);
863 for (i = 0; i < PTR_SIZE; i++)
864 dwarf_line_op(s1, 0);
865 memset(&dwarf_info.base_type_used, 0, sizeof(dwarf_info.base_type_used));
866 }
867 else
868 {
869 /* file info: full path + filename */
870 pstrcat(buf, sizeof(buf), "/");
871 section_sym = put_elf_sym(symtab_section, 0, 0,
872 ELFW(ST_INFO)(STB_LOCAL, STT_SECTION), 0,
873 text_section->sh_num, NULL);
874 put_stabs_r(s1, buf, N_SO, 0, 0,
875 text_section->data_offset, text_section, section_sym);
876 put_stabs_r(s1, filename, N_SO, 0, 0,
877 text_section->data_offset, text_section, section_sym);
878 for (i = 0; i < N_DEFAULT_DEBUG; i++)
879 put_stabs(s1, default_debug[i].name, N_LSYM, 0, 0, 0);
880 }
881 /* we're currently 'including' the <command line> */
882 tcc_debug_bincl(s1);
883 }
884 }
885
886 /* put end of translation unit info */
887 ST_FUNC void tcc_debug_end(TCCState *s1)
888 {
889 if (!s1->do_debug)
890 return;
891 if (s1->dwarf) {
892 int i, j;
893 int start_aranges;
894 unsigned char *ptr;
895 int text_size = text_section->data_offset;
896
897 /* dwarf_info */
898 for (i = 0; i < n_debug_anon_hash; i++) {
899 Sym *t = debug_anon_hash[i].type;
900 int pos = dwarf_info_section->data_offset;
901
902 dwarf_data1(dwarf_info_section,
903 IS_UNION (t->type.t) ? DWARF_ABBREV_UNION_EMPTY_TYPE
904 : DWARF_ABBREV_STRUCTURE_EMPTY_TYPE);
905 dwarf_strp(dwarf_info_section,
906 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
907 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL));
908 dwarf_uleb128(dwarf_info_section, 0);
909 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
910 dwarf_uleb128(dwarf_info_section, file->line_num);
911 for (j = 0; j < debug_anon_hash[i].n_debug_type; j++)
912 write32le(dwarf_info_section->data +
913 debug_anon_hash[i].debug_type[j],
914 pos - dwarf_info.start);
915 tcc_free (debug_anon_hash[i].debug_type);
916 }
917 tcc_free (debug_anon_hash);
918 dwarf_data1(dwarf_info_section, 0);
919 ptr = dwarf_info_section->data + dwarf_info.start;
920 write32le(ptr, dwarf_info_section->data_offset - dwarf_info.start - 4);
921 write32le(ptr + 25 + (s1->dwarf >= 5) + PTR_SIZE, text_size);
922
923 /* dwarf_aranges */
924 start_aranges = dwarf_aranges_section->data_offset;
925 dwarf_data4(dwarf_aranges_section, 0); // size
926 dwarf_data2(dwarf_aranges_section, 2); // version
927 dwarf_reloc(dwarf_aranges_section, dwarf_sym.info, R_DATA_32DW);
928 dwarf_data4(dwarf_aranges_section, 0); // dwarf_info
929 #if PTR_SIZE == 4
930 dwarf_data1(dwarf_aranges_section, 4); // address size
931 #else
932 dwarf_data1(dwarf_aranges_section, 8); // address size
933 #endif
934 dwarf_data1(dwarf_aranges_section, 0); // segment selector size
935 dwarf_data4(dwarf_aranges_section, 0); // padding
936 dwarf_reloc(dwarf_aranges_section, section_sym, R_DATA_PTR);
937 #if PTR_SIZE == 4
938 dwarf_data4(dwarf_aranges_section, 0); // Begin
939 dwarf_data4(dwarf_aranges_section, text_size); // End
940 dwarf_data4(dwarf_aranges_section, 0); // End list
941 dwarf_data4(dwarf_aranges_section, 0); // End list
942 #else
943 dwarf_data8(dwarf_aranges_section, 0); // Begin
944 dwarf_data8(dwarf_aranges_section, text_size); // End
945 dwarf_data8(dwarf_aranges_section, 0); // End list
946 dwarf_data8(dwarf_aranges_section, 0); // End list
947 #endif
948 ptr = dwarf_aranges_section->data + start_aranges;
949 write32le(ptr, dwarf_aranges_section->data_offset - start_aranges - 4);
950
951 /* dwarf_line */
952 if (s1->dwarf >= 5) {
953 dwarf_data1(dwarf_line_section, 1); /* col */
954 dwarf_uleb128(dwarf_line_section, DW_LNCT_path);
955 dwarf_uleb128(dwarf_line_section, DW_FORM_line_strp);
956 dwarf_uleb128(dwarf_line_section, dwarf_line.dir_size);
957 for (i = 0; i < dwarf_line.dir_size; i++)
958 dwarf_line_strp(dwarf_line_section, dwarf_line.dir_table[i]);
959 dwarf_data1(dwarf_line_section, 2); /* col */
960 dwarf_uleb128(dwarf_line_section, DW_LNCT_path);
961 dwarf_uleb128(dwarf_line_section, DW_FORM_line_strp);
962 dwarf_uleb128(dwarf_line_section, DW_LNCT_directory_index);
963 dwarf_uleb128(dwarf_line_section, DW_FORM_udata);
964 dwarf_uleb128(dwarf_line_section, dwarf_line.filename_size);
965 for (i = 0; i < dwarf_line.filename_size; i++) {
966 dwarf_line_strp(dwarf_line_section,
967 dwarf_line.filename_table[i].name);
968 dwarf_uleb128(dwarf_line_section,
969 dwarf_line.filename_table[i].dir_entry);
970 }
971 }
972 else {
973 int len;
974
975 for (i = 0; i < dwarf_line.dir_size; i++) {
976 len = strlen(dwarf_line.dir_table[i]) + 1;
977 ptr = section_ptr_add(dwarf_line_section, len);
978 memmove(ptr, dwarf_line.dir_table[i], len);
979 }
980 dwarf_data1(dwarf_line_section, 0); /* end dir */
981 for (i = 0; i < dwarf_line.filename_size; i++) {
982 len = strlen(dwarf_line.filename_table[i].name) + 1;
983 ptr = section_ptr_add(dwarf_line_section, len);
984 memmove(ptr, dwarf_line.filename_table[i].name, len);
985 dwarf_uleb128(dwarf_line_section,
986 dwarf_line.filename_table[i].dir_entry);
987 dwarf_uleb128(dwarf_line_section, 0); /* time */
988 dwarf_uleb128(dwarf_line_section, 0); /* size */
989 }
990 dwarf_data1(dwarf_line_section, 0); /* end file */
991 }
992 for (i = 0; i < dwarf_line.dir_size; i++)
993 tcc_free(dwarf_line.dir_table[i]);
994 tcc_free(dwarf_line.dir_table);
995 for (i = 0; i < dwarf_line.filename_size; i++)
996 tcc_free(dwarf_line.filename_table[i].name);
997 tcc_free(dwarf_line.filename_table);
998
999 dwarf_line_op(s1, 0); // extended
1000 dwarf_uleb128_op(s1, 1); // extended size
1001 dwarf_line_op(s1, DW_LNE_end_sequence);
1002 i = (s1->dwarf >= 5) * 2;
1003 write32le(&dwarf_line_section->data[dwarf_line.start + 6 + i],
1004 dwarf_line_section->data_offset - dwarf_line.start - (10 + i));
1005 section_ptr_add(dwarf_line_section, 3);
1006 dwarf_reloc(dwarf_line_section, section_sym, R_DATA_PTR);
1007 ptr = section_ptr_add(dwarf_line_section, dwarf_line.line_size - 3);
1008 memmove(ptr - 3, dwarf_line.line_data, dwarf_line.line_size);
1009 tcc_free(dwarf_line.line_data);
1010 write32le(dwarf_line_section->data + dwarf_line.start,
1011 dwarf_line_section->data_offset - dwarf_line.start - 4);
1012 }
1013 else
1014 {
1015 put_stabs_r(s1, NULL, N_SO, 0, 0,
1016 text_section->data_offset, text_section, section_sym);
1017 }
1018 tcc_free(debug_hash);
1019 }
1020
1021 static BufferedFile* put_new_file(TCCState *s1)
1022 {
1023 BufferedFile *f = file;
1024 /* use upper file if from inline ":asm:" */
1025 if (f->filename[0] == ':')
1026 f = f->prev;
1027 if (f && new_file) {
1028 new_file = last_line_num = 0;
1029 if (s1->dwarf)
1030 dwarf_file(s1);
1031 else
1032 put_stabs_r(s1, f->filename, N_SOL, 0, 0, ind, text_section, section_sym);
1033 }
1034 return f;
1035 }
1036
1037 /* put alternative filename */
1038 ST_FUNC void tcc_debug_putfile(TCCState *s1, const char *filename)
1039 {
1040 if (0 == strcmp(file->filename, filename))
1041 return;
1042 pstrcpy(file->filename, sizeof(file->filename), filename);
1043 if (!s1->do_debug)
1044 return;
1045 if (s1->dwarf)
1046 dwarf_file(s1);
1047 new_file = 1;
1048 }
1049
1050 /* begin of #include */
1051 ST_FUNC void tcc_debug_bincl(TCCState *s1)
1052 {
1053 if (!s1->do_debug)
1054 return;
1055 if (s1->dwarf)
1056 dwarf_file(s1);
1057 else
1058 put_stabs(s1, file->filename, N_BINCL, 0, 0, 0);
1059 new_file = 1;
1060 }
1061
1062 /* end of #include */
1063 ST_FUNC void tcc_debug_eincl(TCCState *s1)
1064 {
1065 if (!s1->do_debug)
1066 return;
1067 if (s1->dwarf)
1068 dwarf_file(s1);
1069 else
1070 put_stabn(s1, N_EINCL, 0, 0, 0);
1071 new_file = 1;
1072 }
1073
1074 /* generate line number info */
1075 ST_FUNC void tcc_debug_line(TCCState *s1)
1076 {
1077 BufferedFile *f;
1078
1079 if (!s1->do_debug)
1080 return;
1081 if (cur_text_section != text_section)
1082 return;
1083 f = put_new_file(s1);
1084 if (!f)
1085 return;
1086 if (last_line_num == f->line_num)
1087 return;
1088 last_line_num = f->line_num;
1089
1090 if (s1->dwarf) {
1091 int len_pc = (ind - dwarf_line.last_pc) / DWARF_MIN_INSTR_LEN;
1092 int len_line = f->line_num - dwarf_line.last_line;
1093 int n = len_pc * DWARF_LINE_RANGE + len_line + DWARF_OPCODE_BASE - DWARF_LINE_BASE;
1094
1095 if (dwarf_line.cur_file != dwarf_line.last_file) {
1096 dwarf_line.last_file = dwarf_line.cur_file;
1097 dwarf_line_op(s1, DW_LNS_set_file);
1098 #ifdef TCC_TARGET_MACHO
1099 dwarf_uleb128_op(s1, dwarf_line.cur_file + 1);
1100 #else
1101 dwarf_uleb128_op(s1, dwarf_line.cur_file);
1102 #endif
1103 }
1104 if (len_pc &&
1105 len_line >= DWARF_LINE_BASE && len_line <= (DWARF_OPCODE_BASE + DWARF_LINE_BASE) &&
1106 n >= DWARF_OPCODE_BASE && n <= 255)
1107 dwarf_line_op(s1, n);
1108 else {
1109 if (len_pc) {
1110 n = len_pc * DWARF_LINE_RANGE + 0 + DWARF_OPCODE_BASE - DWARF_LINE_BASE;
1111 if (n >= DWARF_OPCODE_BASE && n <= 255)
1112 dwarf_line_op(s1, n);
1113 else {
1114 dwarf_line_op(s1, DW_LNS_advance_pc);
1115 dwarf_uleb128_op(s1, len_pc);
1116 }
1117 }
1118 if (len_line) {
1119 n = 0 * DWARF_LINE_RANGE + len_line + DWARF_OPCODE_BASE - DWARF_LINE_BASE;
1120 if (len_line >= DWARF_LINE_BASE && len_line <= (DWARF_OPCODE_BASE + DWARF_LINE_BASE) &&
1121 n >= DWARF_OPCODE_BASE && n <= 255)
1122 dwarf_line_op(s1, n);
1123 else {
1124 dwarf_line_op(s1, DW_LNS_advance_line);
1125 dwarf_sleb128_op(s1, len_line);
1126 }
1127 }
1128 }
1129 dwarf_line.last_pc = ind;
1130 dwarf_line.last_line = f->line_num;
1131 }
1132 else
1133 {
1134 if (func_ind != -1) {
1135 put_stabn(s1, N_SLINE, 0, f->line_num, ind - func_ind);
1136 } else {
1137 /* from tcc_assemble */
1138 put_stabs_r(s1, NULL, N_SLINE, 0, f->line_num, ind, text_section, section_sym);
1139 }
1140 }
1141 }
1142
1143 static void tcc_debug_stabs (TCCState *s1, const char *str, int type, unsigned long value,
1144 Section *sec, int sym_index, int info)
1145 {
1146 struct debug_sym *s;
1147
1148 if (debug_info) {
1149 debug_info->sym =
1150 (struct debug_sym *)tcc_realloc (debug_info->sym,
1151 sizeof(struct debug_sym) *
1152 (debug_info->n_sym + 1));
1153 s = debug_info->sym + debug_info->n_sym++;
1154 s->type = type;
1155 s->value = value;
1156 s->str = tcc_strdup(str);
1157 s->sec = sec;
1158 s->sym_index = sym_index;
1159 s->info = info;
1160 s->file = dwarf_line.cur_file;
1161 s->line = file->line_num;
1162 }
1163 else if (sec)
1164 put_stabs_r (s1, str, type, 0, 0, value, sec, sym_index);
1165 else
1166 put_stabs (s1, str, type, 0, 0, value);
1167 }
1168
1169 ST_FUNC void tcc_debug_stabn(TCCState *s1, int type, int value)
1170 {
1171 if (!s1->do_debug)
1172 return;
1173 if (type == N_LBRAC) {
1174 struct _debug_info *info =
1175 (struct _debug_info *) tcc_mallocz(sizeof (*info));
1176
1177 info->start = value;
1178 info->parent = debug_info;
1179 if (debug_info) {
1180 if (debug_info->child) {
1181 if (debug_info->child->last)
1182 debug_info->child->last->next = info;
1183 else
1184 debug_info->child->next = info;
1185 debug_info->child->last = info;
1186 }
1187 else
1188 debug_info->child = info;
1189 }
1190 else
1191 debug_info_root = info;
1192 debug_info = info;
1193 }
1194 else {
1195 debug_info->end = value;
1196 debug_info = debug_info->parent;
1197 }
1198 }
1199
1200 static int tcc_debug_find(TCCState *s1, Sym *t, int dwarf)
1201 {
1202 int i;
1203
1204 if (!debug_info && dwarf &&
1205 (t->type.t & VT_BTYPE) == VT_STRUCT && t->c == -1) {
1206 for (i = 0; i < n_debug_anon_hash; i++)
1207 if (t == debug_anon_hash[i].type)
1208 return 0;
1209 debug_anon_hash = (struct _debug_anon_hash *)
1210 tcc_realloc (debug_anon_hash,
1211 (n_debug_anon_hash + 1) * sizeof(*debug_anon_hash));
1212 debug_anon_hash[n_debug_anon_hash].n_debug_type = 0;
1213 debug_anon_hash[n_debug_anon_hash].debug_type = NULL;
1214 debug_anon_hash[n_debug_anon_hash++].type = t;
1215 return 0;
1216 }
1217 for (i = 0; i < n_debug_hash; i++)
1218 if (t == debug_hash[i].type)
1219 return debug_hash[i].debug_type;
1220 return -1;
1221 }
1222
1223 static int tcc_get_dwarf_info(TCCState *s1, Sym *s);
1224
1225 static void tcc_debug_check_anon(TCCState *s1, Sym *t, int debug_type)
1226 {
1227 int i;
1228
1229 if (!debug_info && (t->type.t & VT_BTYPE) == VT_STRUCT && t->type.ref->c == -1)
1230 for (i = 0; i < n_debug_anon_hash; i++)
1231 if (t->type.ref == debug_anon_hash[i].type) {
1232 debug_anon_hash[i].debug_type =
1233 tcc_realloc(debug_anon_hash[i].debug_type,
1234 (debug_anon_hash[i].n_debug_type + 1) * sizeof(int));
1235 debug_anon_hash[i].debug_type[debug_anon_hash[i].n_debug_type++] =
1236 debug_type;
1237 }
1238 }
1239
1240 ST_FUNC void tcc_debug_fix_anon(TCCState *s1, CType *t)
1241 {
1242 int i, j, debug_type;
1243
1244 if (!s1->do_debug || !s1->dwarf || debug_info)
1245 return;
1246 if ((t->t & VT_BTYPE) == VT_STRUCT && t->ref->c != -1)
1247 for (i = 0; i < n_debug_anon_hash; i++)
1248 if (t->ref == debug_anon_hash[i].type) {
1249 Sym sym = {0}; sym .type = *t ;
1250
1251 /* Trick to not hash this struct */
1252 debug_info = (struct _debug_info *) t;
1253 debug_type = tcc_get_dwarf_info(s1, &sym);
1254 debug_info = NULL;
1255 for (j = 0; j < debug_anon_hash[i].n_debug_type; j++)
1256 write32le(dwarf_info_section->data +
1257 debug_anon_hash[i].debug_type[j],
1258 debug_type - dwarf_info.start);
1259 tcc_free(debug_anon_hash[i].debug_type);
1260 n_debug_anon_hash--;
1261 for (; i < n_debug_anon_hash; i++)
1262 debug_anon_hash[i] = debug_anon_hash[i + 1];
1263 }
1264 }
1265
1266 static int tcc_debug_add(TCCState *s1, Sym *t, int dwarf)
1267 {
1268 int offset = dwarf ? dwarf_info_section->data_offset : ++debug_next_type;
1269 debug_hash = (struct _debug_hash *)
1270 tcc_realloc (debug_hash,
1271 (n_debug_hash + 1) * sizeof(*debug_hash));
1272 debug_hash[n_debug_hash].debug_type = offset;
1273 debug_hash[n_debug_hash++].type = t;
1274 return offset;
1275 }
1276
1277 static void tcc_debug_remove(TCCState *s1, Sym *t)
1278 {
1279 int i;
1280
1281 for (i = 0; i < n_debug_hash; i++)
1282 if (t == debug_hash[i].type) {
1283 n_debug_hash--;
1284 for (; i < n_debug_hash; i++)
1285 debug_hash[i] = debug_hash[i+1];
1286 }
1287 }
1288
1289 static void tcc_get_debug_info(TCCState *s1, Sym *s, CString *result)
1290 {
1291 int type;
1292 int n = 0;
1293 int debug_type = -1;
1294 Sym *t = s;
1295 CString str;
1296
1297 for (;;) {
1298 type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
1299 if ((type & VT_BTYPE) != VT_BYTE)
1300 type &= ~VT_DEFSIGN;
1301 if (type == VT_PTR || type == (VT_PTR | VT_ARRAY))
1302 n++, t = t->type.ref;
1303 else
1304 break;
1305 }
1306 if ((type & VT_BTYPE) == VT_STRUCT) {
1307 Sym *e = t;
1308
1309 t = t->type.ref;
1310 debug_type = tcc_debug_find(s1, t, 0);
1311 if (debug_type == -1) {
1312 debug_type = tcc_debug_add(s1, t, 0);
1313 cstr_new (&str);
1314 cstr_printf (&str, "%s:T%d=%c%d",
1315 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
1316 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL),
1317 debug_type,
1318 IS_UNION (t->type.t) ? 'u' : 's',
1319 t->c);
1320 while (t->next) {
1321 int pos, size, align;
1322
1323 t = t->next;
1324 cstr_printf (&str, "%s:",
1325 (t->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
1326 ? "" : get_tok_str(t->v & ~SYM_FIELD, NULL));
1327 tcc_get_debug_info (s1, t, &str);
1328 if (t->type.t & VT_BITFIELD) {
1329 pos = t->c * 8 + BIT_POS(t->type.t);
1330 size = BIT_SIZE(t->type.t);
1331 }
1332 else {
1333 pos = t->c * 8;
1334 size = type_size(&t->type, &align) * 8;
1335 }
1336 cstr_printf (&str, ",%d,%d;", pos, size);
1337 }
1338 cstr_printf (&str, ";");
1339 tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0, 0);
1340 cstr_free (&str);
1341 if (debug_info)
1342 tcc_debug_remove(s1, e);
1343 }
1344 }
1345 else if (IS_ENUM(type)) {
1346 Sym *e = t = t->type.ref;
1347
1348 debug_type = tcc_debug_find(s1, t, 0);
1349 if (debug_type == -1) {
1350 debug_type = tcc_debug_add(s1, t, 0);
1351 cstr_new (&str);
1352 cstr_printf (&str, "%s:T%d=e",
1353 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
1354 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL),
1355 debug_type);
1356 while (t->next) {
1357 t = t->next;
1358 cstr_printf (&str, "%s:",
1359 (t->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
1360 ? "" : get_tok_str(t->v & ~SYM_FIELD, NULL));
1361 cstr_printf (&str, e->type.t & VT_UNSIGNED ? "%u," : "%d,",
1362 (int)t->enum_val);
1363 }
1364 cstr_printf (&str, ";");
1365 tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0, 0);
1366 cstr_free (&str);
1367 if (debug_info)
1368 tcc_debug_remove(s1, e);
1369 }
1370 }
1371 else if ((type & VT_BTYPE) != VT_FUNC) {
1372 type &= ~VT_STRUCT_MASK;
1373 for (debug_type = 1; debug_type <= N_DEFAULT_DEBUG; debug_type++)
1374 if (default_debug[debug_type - 1].type == type)
1375 break;
1376 if (debug_type > N_DEFAULT_DEBUG)
1377 return;
1378 }
1379 if (n > 0)
1380 cstr_printf (result, "%d=", ++debug_next_type);
1381 t = s;
1382 for (;;) {
1383 type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
1384 if ((type & VT_BTYPE) != VT_BYTE)
1385 type &= ~VT_DEFSIGN;
1386 if (type == VT_PTR)
1387 cstr_printf (result, "%d=*", ++debug_next_type);
1388 else if (type == (VT_PTR | VT_ARRAY))
1389 cstr_printf (result, "%d=ar1;0;%d;",
1390 ++debug_next_type, t->type.ref->c - 1);
1391 else if (type == VT_FUNC) {
1392 cstr_printf (result, "%d=f", ++debug_next_type);
1393 tcc_get_debug_info (s1, t->type.ref, result);
1394 return;
1395 }
1396 else
1397 break;
1398 t = t->type.ref;
1399 }
1400 cstr_printf (result, "%d", debug_type);
1401 }
1402
1403 static int tcc_get_dwarf_info(TCCState *s1, Sym *s)
1404 {
1405 int type;
1406 int debug_type = -1;
1407 Sym *e, *t = s;
1408 int i;
1409 int last_pos = -1;
1410 int retval;
1411
1412 if (new_file)
1413 put_new_file(s1);
1414 for (;;) {
1415 type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
1416 if ((type & VT_BTYPE) != VT_BYTE)
1417 type &= ~VT_DEFSIGN;
1418 if (type == VT_PTR || type == (VT_PTR | VT_ARRAY))
1419 t = t->type.ref;
1420 else
1421 break;
1422 }
1423 if ((type & VT_BTYPE) == VT_STRUCT) {
1424 t = t->type.ref;
1425 debug_type = tcc_debug_find(s1, t, 1);
1426 if (debug_type == -1) {
1427 int pos_sib = 0, i, *pos_type;
1428
1429 debug_type = tcc_debug_add(s1, t, 1);
1430 e = t;
1431 i = 0;
1432 while (e->next) {
1433 e = e->next;
1434 i++;
1435 }
1436 pos_type = (int *) tcc_malloc(i * sizeof(int));
1437 dwarf_data1(dwarf_info_section,
1438 IS_UNION (t->type.t)
1439 ? t->next ? DWARF_ABBREV_UNION_TYPE
1440 : DWARF_ABBREV_UNION_EMPTY_TYPE
1441 : t->next ? DWARF_ABBREV_STRUCTURE_TYPE
1442 : DWARF_ABBREV_STRUCTURE_EMPTY_TYPE);
1443 dwarf_strp(dwarf_info_section,
1444 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
1445 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL));
1446 dwarf_uleb128(dwarf_info_section, t->c);
1447 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1448 dwarf_uleb128(dwarf_info_section, file->line_num);
1449 if (t->next) {
1450 pos_sib = dwarf_info_section->data_offset;
1451 dwarf_data4(dwarf_info_section, 0);
1452 }
1453 e = t;
1454 i = 0;
1455 while (e->next) {
1456 e = e->next;
1457 dwarf_data1(dwarf_info_section,
1458 e->type.t & VT_BITFIELD ? DWARF_ABBREV_MEMBER_BF
1459 : DWARF_ABBREV_MEMBER);
1460 dwarf_strp(dwarf_info_section,
1461 (e->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
1462 ? "" : get_tok_str(e->v & ~SYM_FIELD, NULL));
1463 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1464 dwarf_uleb128(dwarf_info_section, file->line_num);
1465 pos_type[i++] = dwarf_info_section->data_offset;
1466 dwarf_data4(dwarf_info_section, 0);
1467 if (e->type.t & VT_BITFIELD) {
1468 int pos = e->c * 8 + BIT_POS(e->type.t);
1469 int size = BIT_SIZE(e->type.t);
1470
1471 dwarf_uleb128(dwarf_info_section, size);
1472 dwarf_uleb128(dwarf_info_section, pos);
1473 }
1474 else
1475 dwarf_uleb128(dwarf_info_section, e->c);
1476 }
1477 if (t->next) {
1478 dwarf_data1(dwarf_info_section, 0);
1479 write32le(dwarf_info_section->data + pos_sib,
1480 dwarf_info_section->data_offset - dwarf_info.start);
1481 }
1482 e = t;
1483 i = 0;
1484 while (e->next) {
1485 e = e->next;
1486 type = tcc_get_dwarf_info(s1, e);
1487 tcc_debug_check_anon(s1, e, pos_type[i]);
1488 write32le(dwarf_info_section->data + pos_type[i++],
1489 type - dwarf_info.start);
1490 }
1491 tcc_free(pos_type);
1492 if (debug_info)
1493 tcc_debug_remove(s1, t);
1494 }
1495 }
1496 else if (IS_ENUM(type)) {
1497 t = t->type.ref;
1498 debug_type = tcc_debug_find(s1, t, 1);
1499 if (debug_type == -1) {
1500 int pos_sib, pos_type;
1501 Sym sym = {0}; sym.type.t = VT_INT | (type & VT_UNSIGNED);
1502
1503 pos_type = tcc_get_dwarf_info(s1, &sym);
1504 debug_type = tcc_debug_add(s1, t, 1);
1505 dwarf_data1(dwarf_info_section, DWARF_ABBREV_ENUMERATION_TYPE);
1506 dwarf_strp(dwarf_info_section,
1507 (t->v & ~SYM_STRUCT) >= SYM_FIRST_ANOM
1508 ? "" : get_tok_str(t->v & ~SYM_STRUCT, NULL));
1509 dwarf_data1(dwarf_info_section,
1510 type & VT_UNSIGNED ? DW_ATE_unsigned : DW_ATE_signed );
1511 dwarf_data1(dwarf_info_section, 4);
1512 dwarf_data4(dwarf_info_section, pos_type - dwarf_info.start);
1513 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1514 dwarf_uleb128(dwarf_info_section, file->line_num);
1515 pos_sib = dwarf_info_section->data_offset;
1516 dwarf_data4(dwarf_info_section, 0);
1517 e = t;
1518 while (e->next) {
1519 e = e->next;
1520 dwarf_data1(dwarf_info_section,
1521 type & VT_UNSIGNED ? DWARF_ABBREV_ENUMERATOR_UNSIGNED
1522 : DWARF_ABBREV_ENUMERATOR_SIGNED);
1523 dwarf_strp(dwarf_info_section,
1524 (e->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
1525 ? "" : get_tok_str(e->v & ~SYM_FIELD, NULL));
1526 if (type & VT_UNSIGNED)
1527 dwarf_uleb128(dwarf_info_section, e->enum_val);
1528 else
1529 dwarf_sleb128(dwarf_info_section, e->enum_val);
1530 }
1531 dwarf_data1(dwarf_info_section, 0);
1532 write32le(dwarf_info_section->data + pos_sib,
1533 dwarf_info_section->data_offset - dwarf_info.start);
1534 if (debug_info)
1535 tcc_debug_remove(s1, t);
1536 }
1537 }
1538 else if ((type & VT_BTYPE) != VT_FUNC) {
1539 type &= ~VT_STRUCT_MASK;
1540 for (i = 1; i <= N_DEFAULT_DEBUG; i++)
1541 if (default_debug[i - 1].type == type)
1542 break;
1543 if (i > N_DEFAULT_DEBUG)
1544 return 0;
1545 debug_type = dwarf_info.base_type_used[i - 1];
1546 if (debug_type == 0) {
1547 char name[100];
1548
1549 debug_type = dwarf_info_section->data_offset;
1550 dwarf_data1(dwarf_info_section, DWARF_ABBREV_BASE_TYPE);
1551 dwarf_uleb128(dwarf_info_section, default_debug[i - 1].size);
1552 dwarf_data1(dwarf_info_section, default_debug[i - 1].encoding);
1553 strncpy(name, default_debug[i - 1].name, sizeof(name) -1);
1554 *strchr(name, ':') = 0;
1555 dwarf_strp(dwarf_info_section, name);
1556 dwarf_info.base_type_used[i - 1] = debug_type;
1557 }
1558 }
1559 retval = debug_type;
1560 e = NULL;
1561 t = s;
1562 for (;;) {
1563 type = t->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE | VT_VLA);
1564 if ((type & VT_BTYPE) != VT_BYTE)
1565 type &= ~VT_DEFSIGN;
1566 if (type == VT_PTR) {
1567 i = dwarf_info_section->data_offset;
1568 if (retval == debug_type)
1569 retval = i;
1570 dwarf_data1(dwarf_info_section, DWARF_ABBREV_POINTER);
1571 dwarf_data1(dwarf_info_section, PTR_SIZE);
1572 if (last_pos != -1) {
1573 tcc_debug_check_anon(s1, e, last_pos);
1574 write32le(dwarf_info_section->data + last_pos,
1575 i - dwarf_info.start);
1576 }
1577 last_pos = dwarf_info_section->data_offset;
1578 e = t->type.ref;
1579 dwarf_data4(dwarf_info_section, 0);
1580 }
1581 else if (type == (VT_PTR | VT_ARRAY)) {
1582 int sib_pos, sub_type;
1583 #if LONG_SIZE == 4
1584 Sym sym = {0}; sym.type.t = VT_LONG | VT_INT | VT_UNSIGNED;
1585 #else
1586 Sym sym = {0}; sym.type.t = VT_LLONG | VT_LONG | VT_UNSIGNED;
1587 #endif
1588
1589 sub_type = tcc_get_dwarf_info(s1, &sym);
1590 i = dwarf_info_section->data_offset;
1591 if (retval == debug_type)
1592 retval = i;
1593 dwarf_data1(dwarf_info_section, DWARF_ABBREV_ARRAY_TYPE);
1594 if (last_pos != -1) {
1595 tcc_debug_check_anon(s1, e, last_pos);
1596 write32le(dwarf_info_section->data + last_pos,
1597 i - dwarf_info.start);
1598 }
1599 last_pos = dwarf_info_section->data_offset;
1600 e = t->type.ref;
1601 dwarf_data4(dwarf_info_section, 0);
1602 sib_pos = dwarf_info_section->data_offset;
1603 dwarf_data4(dwarf_info_section, 0);
1604 for (;;) {
1605 dwarf_data1(dwarf_info_section, DWARF_ABBREV_SUBRANGE_TYPE);
1606 dwarf_data4(dwarf_info_section, sub_type - dwarf_info.start);
1607 dwarf_uleb128(dwarf_info_section, t->type.ref->c - 1);
1608 s = t->type.ref;
1609 type = s->type.t & ~(VT_STORAGE | VT_CONSTANT | VT_VOLATILE);
1610 if (type != (VT_PTR | VT_ARRAY))
1611 break;
1612 t = s;
1613 }
1614 dwarf_data1(dwarf_info_section, 0);
1615 write32le(dwarf_info_section->data + sib_pos,
1616 dwarf_info_section->data_offset - dwarf_info.start);
1617 }
1618 else if (type == VT_FUNC) {
1619 int sib_pos = 0, *pos_type;
1620 Sym *f;
1621
1622 i = dwarf_info_section->data_offset;
1623 debug_type = tcc_get_dwarf_info(s1, t->type.ref);
1624 if (retval == debug_type)
1625 retval = i;
1626 dwarf_data1(dwarf_info_section,
1627 t->type.ref->next ? DWARF_ABBREV_SUBROUTINE_TYPE
1628 : DWARF_ABBREV_SUBROUTINE_EMPTY_TYPE);
1629 if (last_pos != -1) {
1630 tcc_debug_check_anon(s1, e, last_pos);
1631 write32le(dwarf_info_section->data + last_pos,
1632 i - dwarf_info.start);
1633 }
1634 last_pos = dwarf_info_section->data_offset;
1635 e = t->type.ref;
1636 dwarf_data4(dwarf_info_section, 0);
1637 if (t->type.ref->next) {
1638 sib_pos = dwarf_info_section->data_offset;
1639 dwarf_data4(dwarf_info_section, 0);
1640 }
1641 f = t->type.ref;
1642 i = 0;
1643 while (f->next) {
1644 f = f->next;
1645 i++;
1646 }
1647 pos_type = (int *) tcc_malloc(i * sizeof(int));
1648 f = t->type.ref;
1649 i = 0;
1650 while (f->next) {
1651 f = f->next;
1652 dwarf_data1(dwarf_info_section, DWARF_ABBREV_FORMAL_PARAMETER2);
1653 pos_type[i++] = dwarf_info_section->data_offset;
1654 dwarf_data4(dwarf_info_section, 0);
1655 }
1656 if (t->type.ref->next) {
1657 dwarf_data1(dwarf_info_section, 0);
1658 write32le(dwarf_info_section->data + sib_pos,
1659 dwarf_info_section->data_offset - dwarf_info.start);
1660 }
1661 f = t->type.ref;
1662 i = 0;
1663 while (f->next) {
1664 f = f->next;
1665 type = tcc_get_dwarf_info(s1, f);
1666 tcc_debug_check_anon(s1, f, pos_type[i]);
1667 write32le(dwarf_info_section->data + pos_type[i++],
1668 type - dwarf_info.start);
1669 }
1670 tcc_free(pos_type);
1671 }
1672 else {
1673 if (last_pos != -1) {
1674 tcc_debug_check_anon(s1, e, last_pos);
1675 write32le(dwarf_info_section->data + last_pos,
1676 debug_type - dwarf_info.start);
1677 }
1678 break;
1679 }
1680 t = t->type.ref;
1681 }
1682 return retval;
1683 }
1684
1685 static void tcc_debug_finish (TCCState *s1, struct _debug_info *cur)
1686 {
1687 while (cur) {
1688 struct _debug_info *next = cur->next;
1689 int i;
1690
1691 if (s1->dwarf) {
1692
1693 for (i = cur->n_sym - 1; i >= 0; i--) {
1694 struct debug_sym *s = &cur->sym[i];
1695
1696 dwarf_data1(dwarf_info_section,
1697 s->type == N_PSYM
1698 ? DWARF_ABBREV_FORMAL_PARAMETER
1699 : s->type == N_GSYM
1700 ? DWARF_ABBREV_VARIABLE_EXTERNAL
1701 : s->type == N_STSYM
1702 ? DWARF_ABBREV_VARIABLE_STATIC
1703 : DWARF_ABBREV_VARIABLE_LOCAL);
1704 dwarf_strp(dwarf_info_section, s->str);
1705 if (s->type == N_GSYM || s->type == N_STSYM) {
1706 dwarf_uleb128(dwarf_info_section, s->file);
1707 dwarf_uleb128(dwarf_info_section, s->line);
1708 }
1709 dwarf_data4(dwarf_info_section, s->info - dwarf_info.start);
1710 if (s->type == N_GSYM || s->type == N_STSYM) {
1711 /* global/static */
1712 if (s->type == N_GSYM)
1713 dwarf_data1(dwarf_info_section, 1);
1714 dwarf_data1(dwarf_info_section, PTR_SIZE + 1);
1715 dwarf_data1(dwarf_info_section, DW_OP_addr);
1716 if (s->type == N_STSYM)
1717 dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
1718 #if PTR_SIZE == 4
1719 dwarf_data4(dwarf_info_section, s->value);
1720 #else
1721 dwarf_data8(dwarf_info_section, s->value);
1722 #endif
1723 }
1724 else {
1725 /* param/local */
1726 dwarf_data1(dwarf_info_section, dwarf_sleb128_size(s->value) + 1);
1727 dwarf_data1(dwarf_info_section, DW_OP_fbreg);
1728 dwarf_sleb128(dwarf_info_section, s->value);
1729 }
1730 tcc_free (s->str);
1731 }
1732 tcc_free (cur->sym);
1733 dwarf_data1(dwarf_info_section,
1734 cur->child ? DWARF_ABBREV_LEXICAL_BLOCK
1735 : DWARF_ABBREV_LEXICAL_EMPTY_BLOCK);
1736 dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
1737 #if PTR_SIZE == 4
1738 dwarf_data4(dwarf_info_section, func_ind + cur->start);
1739 dwarf_data4(dwarf_info_section, cur->end - cur->start);
1740 #else
1741 dwarf_data8(dwarf_info_section, func_ind + cur->start);
1742 dwarf_data8(dwarf_info_section, cur->end - cur->start);
1743 #endif
1744 tcc_debug_finish (s1, cur->child);
1745 if (cur->child)
1746 dwarf_data1(dwarf_info_section, 0);
1747 }
1748 else
1749 {
1750 for (i = 0; i < cur->n_sym; i++) {
1751 struct debug_sym *s = &cur->sym[i];
1752
1753 if (s->sec)
1754 put_stabs_r(s1, s->str, s->type, 0, 0, s->value,
1755 s->sec, s->sym_index);
1756 else
1757 put_stabs(s1, s->str, s->type, 0, 0, s->value);
1758 tcc_free (s->str);
1759 }
1760 tcc_free (cur->sym);
1761 put_stabn(s1, N_LBRAC, 0, 0, cur->start);
1762 tcc_debug_finish (s1, cur->child);
1763 put_stabn(s1, N_RBRAC, 0, 0, cur->end);
1764 }
1765 tcc_free (cur);
1766 cur = next;
1767 }
1768 }
1769
1770 ST_FUNC void tcc_add_debug_info(TCCState *s1, int param, Sym *s, Sym *e)
1771 {
1772 CString debug_str;
1773 if (!s1->do_debug)
1774 return;
1775 cstr_new (&debug_str);
1776 for (; s != e; s = s->prev) {
1777 if (!s->v || (s->r & VT_VALMASK) != VT_LOCAL)
1778 continue;
1779 if (s1->dwarf) {
1780 tcc_debug_stabs(s1, get_tok_str(s->v, NULL),
1781 param ? N_PSYM : N_LSYM, s->c, NULL, 0,
1782 tcc_get_dwarf_info(s1, s));
1783 }
1784 else
1785 {
1786 cstr_reset (&debug_str);
1787 cstr_printf (&debug_str, "%s:%s", get_tok_str(s->v, NULL),
1788 param ? "p" : "");
1789 tcc_get_debug_info(s1, s, &debug_str);
1790 tcc_debug_stabs(s1, debug_str.data, param ? N_PSYM : N_LSYM,
1791 s->c, NULL, 0, 0);
1792 }
1793 }
1794 cstr_free (&debug_str);
1795 }
1796
1797 /* put function symbol */
1798 ST_FUNC void tcc_debug_funcstart(TCCState *s1, Sym *sym)
1799 {
1800 CString debug_str;
1801 BufferedFile *f;
1802
1803 if (!s1->do_debug)
1804 return;
1805 debug_info_root = NULL;
1806 debug_info = NULL;
1807 tcc_debug_stabn(s1, N_LBRAC, ind - func_ind);
1808 f = put_new_file(s1);
1809 if (!f)
1810 return;
1811
1812 if (s1->dwarf) {
1813 tcc_debug_line(s1);
1814 dwarf_info.func = sym;
1815 dwarf_info.line = file->line_num;
1816 if (s1->do_backtrace) {
1817 int i, len;
1818
1819 dwarf_line_op(s1, 0); // extended
1820 dwarf_uleb128_op(s1, strlen(funcname) + 2);
1821 dwarf_line_op(s1, DW_LNE_hi_user - 1);
1822 len = strlen(funcname) + 1;
1823 for (i = 0; i < len; i++)
1824 dwarf_line_op(s1, funcname[i]);
1825 }
1826 }
1827 else
1828 {
1829 cstr_new (&debug_str);
1830 cstr_printf(&debug_str, "%s:%c", funcname, sym->type.t & VT_STATIC ? 'f' : 'F');
1831 tcc_get_debug_info(s1, sym->type.ref, &debug_str);
1832 put_stabs_r(s1, debug_str.data, N_FUN, 0, f->line_num, 0, cur_text_section, sym->c);
1833 cstr_free (&debug_str);
1834 tcc_debug_line(s1);
1835 }
1836 }
1837
1838 ST_FUNC void tcc_debug_prolog_epilog(TCCState *s1, int value)
1839 {
1840 if (!s1->do_debug)
1841 return;
1842 if (s1->dwarf) {
1843 dwarf_line_op(s1, value == 0 ? DW_LNS_set_prologue_end
1844 : DW_LNS_set_epilogue_begin);
1845 }
1846 }
1847
1848 /* put function size */
1849 ST_FUNC void tcc_debug_funcend(TCCState *s1, int size)
1850 {
1851 /* lldb does not like function end and next function start at same pc */
1852 int min_instr_len;
1853
1854 if (!s1->do_debug)
1855 return;
1856 min_instr_len = dwarf_line.last_pc == ind ? 0 : DWARF_MIN_INSTR_LEN;
1857 ind -= min_instr_len;
1858 tcc_debug_line(s1);
1859 ind += min_instr_len;
1860 tcc_debug_stabn(s1, N_RBRAC, size);
1861 if (s1->dwarf) {
1862 int func_sib = 0;
1863 Sym *sym = dwarf_info.func;
1864 int n_debug_info = tcc_get_dwarf_info(s1, sym->type.ref);
1865
1866 dwarf_data1(dwarf_info_section,
1867 sym->type.t & VT_STATIC ? DWARF_ABBREV_SUBPROGRAM_STATIC
1868 : DWARF_ABBREV_SUBPROGRAM_EXTERNAL);
1869 if ((sym->type.t & VT_STATIC) == 0)
1870 dwarf_data1(dwarf_info_section, 1);
1871 dwarf_strp(dwarf_info_section, funcname);
1872 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1873 dwarf_uleb128(dwarf_info_section, dwarf_info.line);
1874 tcc_debug_check_anon(s1, sym->type.ref, dwarf_info_section->data_offset);
1875 dwarf_data4(dwarf_info_section, n_debug_info - dwarf_info.start);
1876 dwarf_reloc(dwarf_info_section, section_sym, R_DATA_PTR);
1877 #if PTR_SIZE == 4
1878 dwarf_data4(dwarf_info_section, func_ind); // low_pc
1879 dwarf_data4(dwarf_info_section, size); // high_pc
1880 #else
1881 dwarf_data8(dwarf_info_section, func_ind); // low_pc
1882 dwarf_data8(dwarf_info_section, size); // high_pc
1883 #endif
1884 func_sib = dwarf_info_section->data_offset;
1885 dwarf_data4(dwarf_info_section, 0); // sibling
1886 dwarf_data1(dwarf_info_section, 1);
1887 #if defined(TCC_TARGET_I386)
1888 dwarf_data1(dwarf_info_section, DW_OP_reg5); // ebp
1889 #elif defined(TCC_TARGET_X86_64)
1890 dwarf_data1(dwarf_info_section, DW_OP_reg6); // rbp
1891 #elif defined TCC_TARGET_ARM
1892 dwarf_data1(dwarf_info_section, DW_OP_reg13); // sp
1893 #elif defined TCC_TARGET_ARM64
1894 dwarf_data1(dwarf_info_section, DW_OP_reg29); // reg 29
1895 #elif defined TCC_TARGET_RISCV64
1896 dwarf_data1(dwarf_info_section, DW_OP_reg8); // r8(s0)
1897 #else
1898 dwarf_data1(dwarf_info_section, DW_OP_call_frame_cfa);
1899 #endif
1900 tcc_debug_finish (s1, debug_info_root);
1901 dwarf_data1(dwarf_info_section, 0);
1902 write32le(dwarf_info_section->data + func_sib,
1903 dwarf_info_section->data_offset - dwarf_info.start);
1904 }
1905 else
1906 {
1907 tcc_debug_finish (s1, debug_info_root);
1908 }
1909 }
1910
1911
1912 ST_FUNC void tcc_debug_extern_sym(TCCState *s1, Sym *sym, int sh_num, int sym_bind, int sym_type)
1913 {
1914 if (!s1->do_debug)
1915 return;
1916 if (sym_type == STT_FUNC || sym->v >= SYM_FIRST_ANOM)
1917 return;
1918 if (s1->dwarf) {
1919 int debug_type;
1920
1921 debug_type = tcc_get_dwarf_info(s1, sym);
1922 dwarf_data1(dwarf_info_section,
1923 sym_bind == STB_GLOBAL
1924 ? DWARF_ABBREV_VARIABLE_EXTERNAL
1925 : DWARF_ABBREV_VARIABLE_STATIC);
1926 dwarf_strp(dwarf_info_section, get_tok_str(sym->v, NULL));
1927 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1928 dwarf_uleb128(dwarf_info_section, file->line_num);
1929 tcc_debug_check_anon(s1, sym, dwarf_info_section->data_offset);
1930 dwarf_data4(dwarf_info_section, debug_type - dwarf_info.start);
1931 if (sym_bind == STB_GLOBAL)
1932 dwarf_data1(dwarf_info_section, 1);
1933 dwarf_data1(dwarf_info_section, PTR_SIZE + 1);
1934 dwarf_data1(dwarf_info_section, DW_OP_addr);
1935 greloca(dwarf_info_section, sym, dwarf_info_section->data_offset,
1936 R_DATA_PTR, 0);
1937 #if PTR_SIZE == 4
1938 dwarf_data4(dwarf_info_section, 0);
1939 #else
1940 dwarf_data8(dwarf_info_section, 0);
1941 #endif
1942 }
1943 else
1944 {
1945 Section *s = sh_num == SHN_COMMON ? common_section
1946 : s1->sections[sh_num];
1947 CString str;
1948
1949 cstr_new (&str);
1950 cstr_printf (&str, "%s:%c",
1951 get_tok_str(sym->v, NULL),
1952 sym_bind == STB_GLOBAL ? 'G' : func_ind != -1 ? 'V' : 'S'
1953 );
1954 tcc_get_debug_info(s1, sym, &str);
1955 if (sym_bind == STB_GLOBAL)
1956 tcc_debug_stabs(s1, str.data, N_GSYM, 0, NULL, 0, 0);
1957 else
1958 tcc_debug_stabs(s1, str.data,
1959 (sym->type.t & VT_STATIC) && data_section == s
1960 ? N_STSYM : N_LCSYM, 0, s, sym->c, 0);
1961 cstr_free (&str);
1962 }
1963 }
1964
1965 ST_FUNC void tcc_debug_typedef(TCCState *s1, Sym *sym)
1966 {
1967 if (!s1->do_debug)
1968 return;
1969 if (s1->dwarf) {
1970 int debug_type;
1971
1972 debug_type = tcc_get_dwarf_info(s1, sym);
1973 if (debug_type != -1) {
1974 dwarf_data1(dwarf_info_section, DWARF_ABBREV_TYPEDEF);
1975 dwarf_strp(dwarf_info_section, get_tok_str(sym->v & ~SYM_FIELD, NULL));
1976 dwarf_uleb128(dwarf_info_section, dwarf_line.cur_file);
1977 dwarf_uleb128(dwarf_info_section, file->line_num);
1978 tcc_debug_check_anon(s1, sym, dwarf_info_section->data_offset);
1979 dwarf_data4(dwarf_info_section, debug_type - dwarf_info.start);
1980 }
1981 }
1982 else
1983 {
1984 CString str;
1985 cstr_new (&str);
1986 cstr_printf (&str, "%s:t",
1987 (sym->v & ~SYM_FIELD) >= SYM_FIRST_ANOM
1988 ? "" : get_tok_str(sym->v & ~SYM_FIELD, NULL));
1989 tcc_get_debug_info(s1, sym, &str);
1990 tcc_debug_stabs(s1, str.data, N_LSYM, 0, NULL, 0, 0);
1991 cstr_free (&str);
1992 }
1993 }
1994
1995 /* ------------------------------------------------------------------------- */
1996 /* for section layout see lib/tcov.c */
1997
1998 ST_FUNC void tcc_tcov_block_end(TCCState *s1, int line);
1999
2000 ST_FUNC void tcc_tcov_block_begin(TCCState *s1)
2001 {
2002 SValue sv;
2003 void *ptr;
2004 unsigned long last_offset = tcov_data.offset;
2005
2006 tcc_tcov_block_end (tcc_state, 0);
2007 if (s1->test_coverage == 0 || nocode_wanted)
2008 return;
2009
2010 if (tcov_data.last_file_name == 0 ||
2011 strcmp ((const char *)(tcov_section->data + tcov_data.last_file_name),
2012 file->true_filename) != 0) {
2013 char wd[1024];
2014 CString cstr;
2015
2016 if (tcov_data.last_func_name)
2017 section_ptr_add(tcov_section, 1);
2018 if (tcov_data.last_file_name)
2019 section_ptr_add(tcov_section, 1);
2020 tcov_data.last_func_name = 0;
2021 cstr_new (&cstr);
2022 if (file->true_filename[0] == '/') {
2023 tcov_data.last_file_name = tcov_section->data_offset;
2024 cstr_printf (&cstr, "%s", file->true_filename);
2025 }
2026 else {
2027 getcwd (wd, sizeof(wd));
2028 tcov_data.last_file_name = tcov_section->data_offset + strlen(wd) + 1;
2029 cstr_printf (&cstr, "%s/%s", wd, file->true_filename);
2030 }
2031 ptr = section_ptr_add(tcov_section, cstr.size + 1);
2032 strcpy((char *)ptr, cstr.data);
2033 #ifdef _WIN32
2034 normalize_slashes((char *)ptr);
2035 #endif
2036 cstr_free (&cstr);
2037 }
2038 if (tcov_data.last_func_name == 0 ||
2039 strcmp ((const char *)(tcov_section->data + tcov_data.last_func_name),
2040 funcname) != 0) {
2041 size_t len;
2042
2043 if (tcov_data.last_func_name)
2044 section_ptr_add(tcov_section, 1);
2045 tcov_data.last_func_name = tcov_section->data_offset;
2046 len = strlen (funcname);
2047 ptr = section_ptr_add(tcov_section, len + 1);
2048 strcpy((char *)ptr, funcname);
2049 section_ptr_add(tcov_section, -tcov_section->data_offset & 7);
2050 ptr = section_ptr_add(tcov_section, 8);
2051 write64le (ptr, file->line_num);
2052 }
2053 if (ind == tcov_data.ind && tcov_data.line == file->line_num)
2054 tcov_data.offset = last_offset;
2055 else {
2056 Sym label = {0};
2057 label.type.t = VT_LLONG | VT_STATIC;
2058
2059 ptr = section_ptr_add(tcov_section, 16);
2060 tcov_data.line = file->line_num;
2061 write64le (ptr, (tcov_data.line << 8) | 0xff);
2062 put_extern_sym(&label, tcov_section,
2063 ((unsigned char *)ptr - tcov_section->data) + 8, 0);
2064 sv.type = label.type;
2065 sv.r = VT_SYM | VT_LVAL | VT_CONST;
2066 sv.r2 = VT_CONST;
2067 sv.c.i = 0;
2068 sv.sym = &label;
2069 #if defined TCC_TARGET_I386 || defined TCC_TARGET_X86_64 || \
2070 defined TCC_TARGET_ARM || defined TCC_TARGET_ARM64 || \
2071 defined TCC_TARGET_RISCV64
2072 gen_increment_tcov (&sv);
2073 #else
2074 vpushv(&sv);
2075 inc(0, TOK_INC);
2076 vpop();
2077 #endif
2078 tcov_data.offset = (unsigned char *)ptr - tcov_section->data;
2079 tcov_data.ind = ind;
2080 }
2081 }
2082
2083 ST_FUNC void tcc_tcov_block_end(TCCState *s1, int line)
2084 {
2085 if (s1->test_coverage == 0)
2086 return;
2087 if (line == -1)
2088 line = tcov_data.line;
2089 if (tcov_data.offset) {
2090 void *ptr = tcov_section->data + tcov_data.offset;
2091 unsigned long long nline = line ? line : file->line_num;
2092
2093 write64le (ptr, (read64le (ptr) & 0xfffffffffull) | (nline << 36));
2094 tcov_data.offset = 0;
2095 }
2096 }
2097
2098 ST_FUNC void tcc_tcov_check_line(TCCState *s1, int start)
2099 {
2100 if (s1->test_coverage == 0)
2101 return;
2102 if (tcov_data.line != file->line_num) {
2103 if ((tcov_data.line + 1) != file->line_num) {
2104 tcc_tcov_block_end (s1, -1);
2105 if (start)
2106 tcc_tcov_block_begin (s1);
2107 }
2108 else
2109 tcov_data.line = file->line_num;
2110 }
2111 }
2112
2113 ST_FUNC void tcc_tcov_start(TCCState *s1)
2114 {
2115 if (s1->test_coverage == 0)
2116 return;
2117 if (!s1->dState)
2118 s1->dState = tcc_mallocz(sizeof *s1->dState);
2119 memset (&tcov_data, 0, sizeof (tcov_data));
2120 if (tcov_section == NULL) {
2121 tcov_section = new_section(tcc_state, ".tcov", SHT_PROGBITS,
2122 SHF_ALLOC | SHF_WRITE);
2123 section_ptr_add(tcov_section, 4); // pointer to executable name
2124 }
2125 }
2126
2127 ST_FUNC void tcc_tcov_end(TCCState *s1)
2128 {
2129 if (s1->test_coverage == 0)
2130 return;
2131 if (tcov_data.last_func_name)
2132 section_ptr_add(tcov_section, 1);
2133 if (tcov_data.last_file_name)
2134 section_ptr_add(tcov_section, 1);
2135 }
2136
2137 ST_FUNC void tcc_tcov_reset_ind(TCCState *s1)
2138 {
2139 tcov_data.ind = 0;
2140 }
2141
2142 /* ------------------------------------------------------------------------- */
2143 #undef last_line_num
2144 #undef new_file
2145 #undef section_sym
2146 #undef debug_next_type
2147 #undef debug_hash
2148 #undef n_debug_hash
2149 #undef debug_anon_hash
2150 #undef n_debug_anon_hash
2151 #undef debug_info
2152 #undef debug_info_root
2153 #undef dwarf_sym
2154 #undef dwarf_line
2155 #undef dwarf_info
2156 #undef tcov_data
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