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c906108c | 1 | /* DWARF debugging format support for GDB. |
b6ba6518 KB |
2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
3 | 2001 | |
c906108c SS |
4 | Free Software Foundation, Inc. |
5 | Written by Fred Fish at Cygnus Support. Portions based on dbxread.c, | |
6 | mipsread.c, coffread.c, and dwarfread.c from a Data General SVR4 gdb port. | |
7 | ||
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
10 | This program is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
c906108c | 14 | |
c5aa993b JM |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
c906108c | 19 | |
c5aa993b JM |
20 | You should have received a copy of the GNU General Public License |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
c906108c SS |
23 | |
24 | /* | |
25 | ||
c5aa993b JM |
26 | FIXME: Do we need to generate dependencies in partial symtabs? |
27 | (Perhaps we don't need to). | |
c906108c | 28 | |
c5aa993b JM |
29 | FIXME: Resolve minor differences between what information we put in the |
30 | partial symbol table and what dbxread puts in. For example, we don't yet | |
31 | put enum constants there. And dbxread seems to invent a lot of typedefs | |
32 | we never see. Use the new printpsym command to see the partial symbol table | |
33 | contents. | |
c906108c | 34 | |
c5aa993b JM |
35 | FIXME: Figure out a better way to tell gdb about the name of the function |
36 | contain the user's entry point (I.E. main()) | |
c906108c | 37 | |
c5aa993b JM |
38 | FIXME: See other FIXME's and "ifdef 0" scattered throughout the code for |
39 | other things to work on, if you get bored. :-) | |
c906108c | 40 | |
c5aa993b | 41 | */ |
c906108c SS |
42 | |
43 | #include "defs.h" | |
44 | #include "symtab.h" | |
45 | #include "gdbtypes.h" | |
46 | #include "symfile.h" | |
47 | #include "objfiles.h" | |
48 | #include "elf/dwarf.h" | |
49 | #include "buildsym.h" | |
50 | #include "demangle.h" | |
c5aa993b | 51 | #include "expression.h" /* Needed for enum exp_opcode in language.h, sigh... */ |
c906108c SS |
52 | #include "language.h" |
53 | #include "complaints.h" | |
54 | ||
55 | #include <fcntl.h> | |
56 | #include "gdb_string.h" | |
57 | ||
58 | /* Some macros to provide DIE info for complaints. */ | |
59 | ||
60 | #define DIE_ID (curdie!=NULL ? curdie->die_ref : 0) | |
61 | #define DIE_NAME (curdie!=NULL && curdie->at_name!=NULL) ? curdie->at_name : "" | |
62 | ||
63 | /* Complaints that can be issued during DWARF debug info reading. */ | |
64 | ||
65 | struct complaint no_bfd_get_N = | |
66 | { | |
67 | "DIE @ 0x%x \"%s\", no bfd support for %d byte data object", 0, 0 | |
68 | }; | |
69 | ||
70 | struct complaint malformed_die = | |
71 | { | |
72 | "DIE @ 0x%x \"%s\", malformed DIE, bad length (%d bytes)", 0, 0 | |
73 | }; | |
74 | ||
75 | struct complaint bad_die_ref = | |
76 | { | |
77 | "DIE @ 0x%x \"%s\", reference to DIE (0x%x) outside compilation unit", 0, 0 | |
78 | }; | |
79 | ||
80 | struct complaint unknown_attribute_form = | |
81 | { | |
82 | "DIE @ 0x%x \"%s\", unknown attribute form (0x%x)", 0, 0 | |
83 | }; | |
84 | ||
85 | struct complaint unknown_attribute_length = | |
86 | { | |
87 | "DIE @ 0x%x \"%s\", unknown attribute length, skipped remaining attributes", 0, 0 | |
88 | }; | |
89 | ||
90 | struct complaint unexpected_fund_type = | |
91 | { | |
92 | "DIE @ 0x%x \"%s\", unexpected fundamental type 0x%x", 0, 0 | |
93 | }; | |
94 | ||
95 | struct complaint unknown_type_modifier = | |
96 | { | |
97 | "DIE @ 0x%x \"%s\", unknown type modifier %u", 0, 0 | |
98 | }; | |
99 | ||
100 | struct complaint volatile_ignored = | |
101 | { | |
102 | "DIE @ 0x%x \"%s\", type modifier 'volatile' ignored", 0, 0 | |
103 | }; | |
104 | ||
105 | struct complaint const_ignored = | |
106 | { | |
107 | "DIE @ 0x%x \"%s\", type modifier 'const' ignored", 0, 0 | |
108 | }; | |
109 | ||
110 | struct complaint botched_modified_type = | |
111 | { | |
112 | "DIE @ 0x%x \"%s\", botched modified type decoding (mtype 0x%x)", 0, 0 | |
113 | }; | |
114 | ||
115 | struct complaint op_deref2 = | |
116 | { | |
117 | "DIE @ 0x%x \"%s\", OP_DEREF2 address 0x%x not handled", 0, 0 | |
118 | }; | |
119 | ||
120 | struct complaint op_deref4 = | |
121 | { | |
122 | "DIE @ 0x%x \"%s\", OP_DEREF4 address 0x%x not handled", 0, 0 | |
123 | }; | |
124 | ||
125 | struct complaint basereg_not_handled = | |
126 | { | |
127 | "DIE @ 0x%x \"%s\", BASEREG %d not handled", 0, 0 | |
128 | }; | |
129 | ||
130 | struct complaint dup_user_type_allocation = | |
131 | { | |
132 | "DIE @ 0x%x \"%s\", internal error: duplicate user type allocation", 0, 0 | |
133 | }; | |
134 | ||
135 | struct complaint dup_user_type_definition = | |
136 | { | |
137 | "DIE @ 0x%x \"%s\", internal error: duplicate user type definition", 0, 0 | |
138 | }; | |
139 | ||
140 | struct complaint missing_tag = | |
141 | { | |
142 | "DIE @ 0x%x \"%s\", missing class, structure, or union tag", 0, 0 | |
143 | }; | |
144 | ||
145 | struct complaint bad_array_element_type = | |
146 | { | |
147 | "DIE @ 0x%x \"%s\", bad array element type attribute 0x%x", 0, 0 | |
148 | }; | |
149 | ||
150 | struct complaint subscript_data_items = | |
151 | { | |
152 | "DIE @ 0x%x \"%s\", can't decode subscript data items", 0, 0 | |
153 | }; | |
154 | ||
155 | struct complaint unhandled_array_subscript_format = | |
156 | { | |
157 | "DIE @ 0x%x \"%s\", array subscript format 0x%x not handled yet", 0, 0 | |
158 | }; | |
159 | ||
160 | struct complaint unknown_array_subscript_format = | |
161 | { | |
162 | "DIE @ 0x%x \"%s\", unknown array subscript format %x", 0, 0 | |
163 | }; | |
164 | ||
165 | struct complaint not_row_major = | |
166 | { | |
167 | "DIE @ 0x%x \"%s\", array not row major; not handled correctly", 0, 0 | |
168 | }; | |
169 | ||
170 | struct complaint missing_at_name = | |
171 | { | |
172 | "DIE @ 0x%x, AT_name tag missing", 0, 0 | |
173 | }; | |
174 | ||
175 | typedef unsigned int DIE_REF; /* Reference to a DIE */ | |
176 | ||
177 | #ifndef GCC_PRODUCER | |
178 | #define GCC_PRODUCER "GNU C " | |
179 | #endif | |
180 | ||
181 | #ifndef GPLUS_PRODUCER | |
182 | #define GPLUS_PRODUCER "GNU C++ " | |
183 | #endif | |
184 | ||
185 | #ifndef LCC_PRODUCER | |
186 | #define LCC_PRODUCER "NCR C/C++" | |
187 | #endif | |
188 | ||
189 | #ifndef CHILL_PRODUCER | |
190 | #define CHILL_PRODUCER "GNU Chill " | |
191 | #endif | |
192 | ||
c906108c SS |
193 | /* Flags to target_to_host() that tell whether or not the data object is |
194 | expected to be signed. Used, for example, when fetching a signed | |
195 | integer in the target environment which is used as a signed integer | |
196 | in the host environment, and the two environments have different sized | |
197 | ints. In this case, *somebody* has to sign extend the smaller sized | |
198 | int. */ | |
199 | ||
200 | #define GET_UNSIGNED 0 /* No sign extension required */ | |
201 | #define GET_SIGNED 1 /* Sign extension required */ | |
202 | ||
203 | /* Defines for things which are specified in the document "DWARF Debugging | |
204 | Information Format" published by UNIX International, Programming Languages | |
205 | SIG. These defines are based on revision 1.0.0, Jan 20, 1992. */ | |
206 | ||
207 | #define SIZEOF_DIE_LENGTH 4 | |
208 | #define SIZEOF_DIE_TAG 2 | |
209 | #define SIZEOF_ATTRIBUTE 2 | |
210 | #define SIZEOF_FORMAT_SPECIFIER 1 | |
211 | #define SIZEOF_FMT_FT 2 | |
212 | #define SIZEOF_LINETBL_LENGTH 4 | |
213 | #define SIZEOF_LINETBL_LINENO 4 | |
214 | #define SIZEOF_LINETBL_STMT 2 | |
215 | #define SIZEOF_LINETBL_DELTA 4 | |
216 | #define SIZEOF_LOC_ATOM_CODE 1 | |
217 | ||
218 | #define FORM_FROM_ATTR(attr) ((attr) & 0xF) /* Implicitly specified */ | |
219 | ||
220 | /* Macros that return the sizes of various types of data in the target | |
221 | environment. | |
222 | ||
223 | FIXME: Currently these are just compile time constants (as they are in | |
224 | other parts of gdb as well). They need to be able to get the right size | |
225 | either from the bfd or possibly from the DWARF info. It would be nice if | |
226 | the DWARF producer inserted DIES that describe the fundamental types in | |
227 | the target environment into the DWARF info, similar to the way dbx stabs | |
228 | producers produce information about their fundamental types. */ | |
229 | ||
230 | #define TARGET_FT_POINTER_SIZE(objfile) (TARGET_PTR_BIT / TARGET_CHAR_BIT) | |
231 | #define TARGET_FT_LONG_SIZE(objfile) (TARGET_LONG_BIT / TARGET_CHAR_BIT) | |
232 | ||
233 | /* The Amiga SVR4 header file <dwarf.h> defines AT_element_list as a | |
234 | FORM_BLOCK2, and this is the value emitted by the AT&T compiler. | |
235 | However, the Issue 2 DWARF specification from AT&T defines it as | |
236 | a FORM_BLOCK4, as does the latest specification from UI/PLSIG. | |
237 | For backwards compatibility with the AT&T compiler produced executables | |
238 | we define AT_short_element_list for this variant. */ | |
239 | ||
240 | #define AT_short_element_list (0x00f0|FORM_BLOCK2) | |
241 | ||
242 | /* External variables referenced. */ | |
243 | ||
c5aa993b JM |
244 | extern int info_verbose; /* From main.c; nonzero => verbose */ |
245 | extern char *warning_pre_print; /* From utils.c */ | |
c906108c SS |
246 | |
247 | /* The DWARF debugging information consists of two major pieces, | |
248 | one is a block of DWARF Information Entries (DIE's) and the other | |
249 | is a line number table. The "struct dieinfo" structure contains | |
250 | the information for a single DIE, the one currently being processed. | |
251 | ||
252 | In order to make it easier to randomly access the attribute fields | |
253 | of the current DIE, which are specifically unordered within the DIE, | |
254 | each DIE is scanned and an instance of the "struct dieinfo" | |
255 | structure is initialized. | |
256 | ||
257 | Initialization is done in two levels. The first, done by basicdieinfo(), | |
258 | just initializes those fields that are vital to deciding whether or not | |
259 | to use this DIE, how to skip past it, etc. The second, done by the | |
260 | function completedieinfo(), fills in the rest of the information. | |
261 | ||
262 | Attributes which have block forms are not interpreted at the time | |
263 | the DIE is scanned, instead we just save pointers to the start | |
264 | of their value fields. | |
265 | ||
266 | Some fields have a flag <name>_p that is set when the value of the | |
267 | field is valid (I.E. we found a matching attribute in the DIE). Since | |
268 | we may want to test for the presence of some attributes in the DIE, | |
269 | such as AT_low_pc, without restricting the values of the field, | |
270 | we need someway to note that we found such an attribute. | |
c5aa993b | 271 | |
c906108c | 272 | */ |
c5aa993b | 273 | |
c906108c SS |
274 | typedef char BLOCK; |
275 | ||
c5aa993b JM |
276 | struct dieinfo |
277 | { | |
278 | char *die; /* Pointer to the raw DIE data */ | |
279 | unsigned long die_length; /* Length of the raw DIE data */ | |
280 | DIE_REF die_ref; /* Offset of this DIE */ | |
281 | unsigned short die_tag; /* Tag for this DIE */ | |
282 | unsigned long at_padding; | |
283 | unsigned long at_sibling; | |
284 | BLOCK *at_location; | |
285 | char *at_name; | |
286 | unsigned short at_fund_type; | |
287 | BLOCK *at_mod_fund_type; | |
288 | unsigned long at_user_def_type; | |
289 | BLOCK *at_mod_u_d_type; | |
290 | unsigned short at_ordering; | |
291 | BLOCK *at_subscr_data; | |
292 | unsigned long at_byte_size; | |
293 | unsigned short at_bit_offset; | |
294 | unsigned long at_bit_size; | |
295 | BLOCK *at_element_list; | |
296 | unsigned long at_stmt_list; | |
297 | CORE_ADDR at_low_pc; | |
298 | CORE_ADDR at_high_pc; | |
299 | unsigned long at_language; | |
300 | unsigned long at_member; | |
301 | unsigned long at_discr; | |
302 | BLOCK *at_discr_value; | |
303 | BLOCK *at_string_length; | |
304 | char *at_comp_dir; | |
305 | char *at_producer; | |
306 | unsigned long at_start_scope; | |
307 | unsigned long at_stride_size; | |
308 | unsigned long at_src_info; | |
309 | char *at_prototyped; | |
310 | unsigned int has_at_low_pc:1; | |
311 | unsigned int has_at_stmt_list:1; | |
312 | unsigned int has_at_byte_size:1; | |
313 | unsigned int short_element_list:1; | |
314 | ||
315 | /* Kludge to identify register variables */ | |
316 | ||
317 | unsigned int isreg; | |
318 | ||
319 | /* Kludge to identify optimized out variables */ | |
320 | ||
321 | unsigned int optimized_out; | |
322 | ||
323 | /* Kludge to identify basereg references. | |
324 | Nonzero if we have an offset relative to a basereg. */ | |
325 | ||
326 | unsigned int offreg; | |
327 | ||
328 | /* Kludge to identify which base register is it relative to. */ | |
329 | ||
330 | unsigned int basereg; | |
331 | }; | |
c906108c | 332 | |
c5aa993b | 333 | static int diecount; /* Approximate count of dies for compilation unit */ |
c906108c SS |
334 | static struct dieinfo *curdie; /* For warnings and such */ |
335 | ||
c5aa993b JM |
336 | static char *dbbase; /* Base pointer to dwarf info */ |
337 | static int dbsize; /* Size of dwarf info in bytes */ | |
338 | static int dbroff; /* Relative offset from start of .debug section */ | |
339 | static char *lnbase; /* Base pointer to line section */ | |
c906108c SS |
340 | |
341 | /* This value is added to each symbol value. FIXME: Generalize to | |
342 | the section_offsets structure used by dbxread (once this is done, | |
343 | pass the appropriate section number to end_symtab). */ | |
344 | static CORE_ADDR baseaddr; /* Add to each symbol value */ | |
345 | ||
346 | /* The section offsets used in the current psymtab or symtab. FIXME, | |
347 | only used to pass one value (baseaddr) at the moment. */ | |
348 | static struct section_offsets *base_section_offsets; | |
349 | ||
350 | /* We put a pointer to this structure in the read_symtab_private field | |
351 | of the psymtab. */ | |
352 | ||
c5aa993b JM |
353 | struct dwfinfo |
354 | { | |
355 | /* Always the absolute file offset to the start of the ".debug" | |
356 | section for the file containing the DIE's being accessed. */ | |
357 | file_ptr dbfoff; | |
358 | /* Relative offset from the start of the ".debug" section to the | |
359 | first DIE to be accessed. When building the partial symbol | |
360 | table, this value will be zero since we are accessing the | |
361 | entire ".debug" section. When expanding a partial symbol | |
362 | table entry, this value will be the offset to the first | |
363 | DIE for the compilation unit containing the symbol that | |
364 | triggers the expansion. */ | |
365 | int dbroff; | |
366 | /* The size of the chunk of DIE's being examined, in bytes. */ | |
367 | int dblength; | |
368 | /* The absolute file offset to the line table fragment. Ignored | |
369 | when building partial symbol tables, but used when expanding | |
370 | them, and contains the absolute file offset to the fragment | |
371 | of the ".line" section containing the line numbers for the | |
372 | current compilation unit. */ | |
373 | file_ptr lnfoff; | |
374 | }; | |
c906108c SS |
375 | |
376 | #define DBFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbfoff) | |
377 | #define DBROFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbroff) | |
378 | #define DBLENGTH(p) (((struct dwfinfo *)((p)->read_symtab_private))->dblength) | |
379 | #define LNFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->lnfoff) | |
380 | ||
381 | /* The generic symbol table building routines have separate lists for | |
382 | file scope symbols and all all other scopes (local scopes). So | |
383 | we need to select the right one to pass to add_symbol_to_list(). | |
384 | We do it by keeping a pointer to the correct list in list_in_scope. | |
385 | ||
386 | FIXME: The original dwarf code just treated the file scope as the first | |
387 | local scope, and all other local scopes as nested local scopes, and worked | |
388 | fine. Check to see if we really need to distinguish these in buildsym.c */ | |
389 | ||
390 | struct pending **list_in_scope = &file_symbols; | |
391 | ||
392 | /* DIES which have user defined types or modified user defined types refer to | |
393 | other DIES for the type information. Thus we need to associate the offset | |
394 | of a DIE for a user defined type with a pointer to the type information. | |
395 | ||
396 | Originally this was done using a simple but expensive algorithm, with an | |
397 | array of unsorted structures, each containing an offset/type-pointer pair. | |
398 | This array was scanned linearly each time a lookup was done. The result | |
399 | was that gdb was spending over half it's startup time munging through this | |
400 | array of pointers looking for a structure that had the right offset member. | |
401 | ||
402 | The second attempt used the same array of structures, but the array was | |
403 | sorted using qsort each time a new offset/type was recorded, and a binary | |
404 | search was used to find the type pointer for a given DIE offset. This was | |
405 | even slower, due to the overhead of sorting the array each time a new | |
406 | offset/type pair was entered. | |
407 | ||
408 | The third attempt uses a fixed size array of type pointers, indexed by a | |
409 | value derived from the DIE offset. Since the minimum DIE size is 4 bytes, | |
410 | we can divide any DIE offset by 4 to obtain a unique index into this fixed | |
411 | size array. Since each element is a 4 byte pointer, it takes exactly as | |
412 | much memory to hold this array as to hold the DWARF info for a given | |
413 | compilation unit. But it gets freed as soon as we are done with it. | |
414 | This has worked well in practice, as a reasonable tradeoff between memory | |
415 | consumption and speed, without having to resort to much more complicated | |
416 | algorithms. */ | |
417 | ||
418 | static struct type **utypes; /* Pointer to array of user type pointers */ | |
419 | static int numutypes; /* Max number of user type pointers */ | |
420 | ||
421 | /* Maintain an array of referenced fundamental types for the current | |
422 | compilation unit being read. For DWARF version 1, we have to construct | |
423 | the fundamental types on the fly, since no information about the | |
424 | fundamental types is supplied. Each such fundamental type is created by | |
425 | calling a language dependent routine to create the type, and then a | |
426 | pointer to that type is then placed in the array at the index specified | |
427 | by it's FT_<TYPENAME> value. The array has a fixed size set by the | |
428 | FT_NUM_MEMBERS compile time constant, which is the number of predefined | |
429 | fundamental types gdb knows how to construct. */ | |
430 | ||
c5aa993b | 431 | static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */ |
c906108c SS |
432 | |
433 | /* Record the language for the compilation unit which is currently being | |
434 | processed. We know it once we have seen the TAG_compile_unit DIE, | |
435 | and we need it while processing the DIE's for that compilation unit. | |
436 | It is eventually saved in the symtab structure, but we don't finalize | |
437 | the symtab struct until we have processed all the DIE's for the | |
438 | compilation unit. We also need to get and save a pointer to the | |
439 | language struct for this language, so we can call the language | |
440 | dependent routines for doing things such as creating fundamental | |
441 | types. */ | |
442 | ||
443 | static enum language cu_language; | |
444 | static const struct language_defn *cu_language_defn; | |
445 | ||
446 | /* Forward declarations of static functions so we don't have to worry | |
447 | about ordering within this file. */ | |
448 | ||
a14ed312 | 449 | static void free_utypes (PTR); |
c906108c | 450 | |
a14ed312 | 451 | static int attribute_size (unsigned int); |
c906108c | 452 | |
a14ed312 | 453 | static CORE_ADDR target_to_host (char *, int, int, struct objfile *); |
c906108c | 454 | |
a14ed312 | 455 | static void add_enum_psymbol (struct dieinfo *, struct objfile *); |
c906108c | 456 | |
a14ed312 | 457 | static void handle_producer (char *); |
c906108c SS |
458 | |
459 | static void | |
a14ed312 | 460 | read_file_scope (struct dieinfo *, char *, char *, struct objfile *); |
c906108c SS |
461 | |
462 | static void | |
a14ed312 | 463 | read_func_scope (struct dieinfo *, char *, char *, struct objfile *); |
c906108c SS |
464 | |
465 | static void | |
a14ed312 | 466 | read_lexical_block_scope (struct dieinfo *, char *, char *, struct objfile *); |
c906108c | 467 | |
a14ed312 | 468 | static void scan_partial_symbols (char *, char *, struct objfile *); |
c906108c SS |
469 | |
470 | static void | |
a14ed312 | 471 | scan_compilation_units (char *, char *, file_ptr, file_ptr, struct objfile *); |
c906108c | 472 | |
a14ed312 | 473 | static void add_partial_symbol (struct dieinfo *, struct objfile *); |
c906108c | 474 | |
a14ed312 | 475 | static void basicdieinfo (struct dieinfo *, char *, struct objfile *); |
c906108c | 476 | |
a14ed312 | 477 | static void completedieinfo (struct dieinfo *, struct objfile *); |
c906108c | 478 | |
a14ed312 | 479 | static void dwarf_psymtab_to_symtab (struct partial_symtab *); |
c906108c | 480 | |
a14ed312 | 481 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 482 | |
a14ed312 | 483 | static void read_ofile_symtab (struct partial_symtab *); |
c906108c | 484 | |
a14ed312 | 485 | static void process_dies (char *, char *, struct objfile *); |
c906108c SS |
486 | |
487 | static void | |
a14ed312 | 488 | read_structure_scope (struct dieinfo *, char *, char *, struct objfile *); |
c906108c | 489 | |
a14ed312 | 490 | static struct type *decode_array_element_type (char *); |
c906108c | 491 | |
a14ed312 | 492 | static struct type *decode_subscript_data_item (char *, char *); |
c906108c | 493 | |
a14ed312 | 494 | static void dwarf_read_array_type (struct dieinfo *); |
c906108c | 495 | |
a14ed312 | 496 | static void read_tag_pointer_type (struct dieinfo *dip); |
c906108c | 497 | |
a14ed312 | 498 | static void read_tag_string_type (struct dieinfo *dip); |
c906108c | 499 | |
a14ed312 | 500 | static void read_subroutine_type (struct dieinfo *, char *, char *); |
c906108c SS |
501 | |
502 | static void | |
a14ed312 | 503 | read_enumeration (struct dieinfo *, char *, char *, struct objfile *); |
c906108c | 504 | |
a14ed312 KB |
505 | static struct type *struct_type (struct dieinfo *, char *, char *, |
506 | struct objfile *); | |
c906108c | 507 | |
a14ed312 | 508 | static struct type *enum_type (struct dieinfo *, struct objfile *); |
c906108c | 509 | |
a14ed312 | 510 | static void decode_line_numbers (char *); |
c906108c | 511 | |
a14ed312 | 512 | static struct type *decode_die_type (struct dieinfo *); |
c906108c | 513 | |
a14ed312 | 514 | static struct type *decode_mod_fund_type (char *); |
c906108c | 515 | |
a14ed312 | 516 | static struct type *decode_mod_u_d_type (char *); |
c906108c | 517 | |
a14ed312 | 518 | static struct type *decode_modified_type (char *, unsigned int, int); |
c906108c | 519 | |
a14ed312 | 520 | static struct type *decode_fund_type (unsigned int); |
c906108c | 521 | |
a14ed312 | 522 | static char *create_name (char *, struct obstack *); |
c906108c | 523 | |
a14ed312 | 524 | static struct type *lookup_utype (DIE_REF); |
c906108c | 525 | |
a14ed312 | 526 | static struct type *alloc_utype (DIE_REF, struct type *); |
c906108c | 527 | |
a14ed312 | 528 | static struct symbol *new_symbol (struct dieinfo *, struct objfile *); |
c906108c SS |
529 | |
530 | static void | |
a14ed312 | 531 | synthesize_typedef (struct dieinfo *, struct objfile *, struct type *); |
c906108c | 532 | |
a14ed312 | 533 | static int locval (struct dieinfo *); |
c906108c | 534 | |
a14ed312 | 535 | static void set_cu_language (struct dieinfo *); |
c906108c | 536 | |
a14ed312 | 537 | static struct type *dwarf_fundamental_type (struct objfile *, int); |
c906108c SS |
538 | |
539 | ||
540 | /* | |
541 | ||
c5aa993b | 542 | LOCAL FUNCTION |
c906108c | 543 | |
c5aa993b | 544 | dwarf_fundamental_type -- lookup or create a fundamental type |
c906108c | 545 | |
c5aa993b | 546 | SYNOPSIS |
c906108c | 547 | |
c5aa993b JM |
548 | struct type * |
549 | dwarf_fundamental_type (struct objfile *objfile, int typeid) | |
c906108c | 550 | |
c5aa993b | 551 | DESCRIPTION |
c906108c | 552 | |
c5aa993b JM |
553 | DWARF version 1 doesn't supply any fundamental type information, |
554 | so gdb has to construct such types. It has a fixed number of | |
555 | fundamental types that it knows how to construct, which is the | |
556 | union of all types that it knows how to construct for all languages | |
557 | that it knows about. These are enumerated in gdbtypes.h. | |
c906108c | 558 | |
c5aa993b JM |
559 | As an example, assume we find a DIE that references a DWARF |
560 | fundamental type of FT_integer. We first look in the ftypes | |
561 | array to see if we already have such a type, indexed by the | |
562 | gdb internal value of FT_INTEGER. If so, we simply return a | |
563 | pointer to that type. If not, then we ask an appropriate | |
564 | language dependent routine to create a type FT_INTEGER, using | |
565 | defaults reasonable for the current target machine, and install | |
566 | that type in ftypes for future reference. | |
c906108c | 567 | |
c5aa993b | 568 | RETURNS |
c906108c | 569 | |
c5aa993b | 570 | Pointer to a fundamental type. |
c906108c | 571 | |
c5aa993b | 572 | */ |
c906108c SS |
573 | |
574 | static struct type * | |
fba45db2 | 575 | dwarf_fundamental_type (struct objfile *objfile, int typeid) |
c906108c SS |
576 | { |
577 | if (typeid < 0 || typeid >= FT_NUM_MEMBERS) | |
578 | { | |
579 | error ("internal error - invalid fundamental type id %d", typeid); | |
580 | } | |
581 | ||
582 | /* Look for this particular type in the fundamental type vector. If one is | |
583 | not found, create and install one appropriate for the current language | |
584 | and the current target machine. */ | |
585 | ||
586 | if (ftypes[typeid] == NULL) | |
587 | { | |
c5aa993b | 588 | ftypes[typeid] = cu_language_defn->la_fund_type (objfile, typeid); |
c906108c SS |
589 | } |
590 | ||
591 | return (ftypes[typeid]); | |
592 | } | |
593 | ||
594 | /* | |
595 | ||
c5aa993b | 596 | LOCAL FUNCTION |
c906108c | 597 | |
c5aa993b | 598 | set_cu_language -- set local copy of language for compilation unit |
c906108c | 599 | |
c5aa993b | 600 | SYNOPSIS |
c906108c | 601 | |
c5aa993b JM |
602 | void |
603 | set_cu_language (struct dieinfo *dip) | |
c906108c | 604 | |
c5aa993b | 605 | DESCRIPTION |
c906108c | 606 | |
c5aa993b JM |
607 | Decode the language attribute for a compilation unit DIE and |
608 | remember what the language was. We use this at various times | |
609 | when processing DIE's for a given compilation unit. | |
c906108c | 610 | |
c5aa993b | 611 | RETURNS |
c906108c | 612 | |
c5aa993b | 613 | No return value. |
c906108c SS |
614 | |
615 | */ | |
616 | ||
617 | static void | |
fba45db2 | 618 | set_cu_language (struct dieinfo *dip) |
c906108c | 619 | { |
c5aa993b | 620 | switch (dip->at_language) |
c906108c | 621 | { |
c5aa993b JM |
622 | case LANG_C89: |
623 | case LANG_C: | |
624 | cu_language = language_c; | |
625 | break; | |
626 | case LANG_C_PLUS_PLUS: | |
627 | cu_language = language_cplus; | |
628 | break; | |
629 | case LANG_CHILL: | |
630 | cu_language = language_chill; | |
631 | break; | |
632 | case LANG_MODULA2: | |
633 | cu_language = language_m2; | |
634 | break; | |
635 | case LANG_FORTRAN77: | |
636 | case LANG_FORTRAN90: | |
637 | cu_language = language_fortran; | |
638 | break; | |
639 | case LANG_ADA83: | |
640 | case LANG_COBOL74: | |
641 | case LANG_COBOL85: | |
642 | case LANG_PASCAL83: | |
643 | /* We don't know anything special about these yet. */ | |
644 | cu_language = language_unknown; | |
645 | break; | |
646 | default: | |
647 | /* If no at_language, try to deduce one from the filename */ | |
648 | cu_language = deduce_language_from_filename (dip->at_name); | |
649 | break; | |
c906108c SS |
650 | } |
651 | cu_language_defn = language_def (cu_language); | |
652 | } | |
653 | ||
654 | /* | |
655 | ||
c5aa993b | 656 | GLOBAL FUNCTION |
c906108c | 657 | |
c5aa993b | 658 | dwarf_build_psymtabs -- build partial symtabs from DWARF debug info |
c906108c | 659 | |
c5aa993b | 660 | SYNOPSIS |
c906108c | 661 | |
c5aa993b | 662 | void dwarf_build_psymtabs (struct objfile *objfile, |
c5aa993b JM |
663 | int mainline, file_ptr dbfoff, unsigned int dbfsize, |
664 | file_ptr lnoffset, unsigned int lnsize) | |
c906108c | 665 | |
c5aa993b | 666 | DESCRIPTION |
c906108c | 667 | |
c5aa993b JM |
668 | This function is called upon to build partial symtabs from files |
669 | containing DIE's (Dwarf Information Entries) and DWARF line numbers. | |
c906108c | 670 | |
c5aa993b JM |
671 | It is passed a bfd* containing the DIES |
672 | and line number information, the corresponding filename for that | |
673 | file, a base address for relocating the symbols, a flag indicating | |
674 | whether or not this debugging information is from a "main symbol | |
675 | table" rather than a shared library or dynamically linked file, | |
676 | and file offset/size pairs for the DIE information and line number | |
677 | information. | |
c906108c | 678 | |
c5aa993b | 679 | RETURNS |
c906108c | 680 | |
c5aa993b | 681 | No return value. |
c906108c SS |
682 | |
683 | */ | |
684 | ||
685 | void | |
fba45db2 KB |
686 | dwarf_build_psymtabs (struct objfile *objfile, int mainline, file_ptr dbfoff, |
687 | unsigned int dbfsize, file_ptr lnoffset, | |
688 | unsigned int lnsize) | |
c906108c SS |
689 | { |
690 | bfd *abfd = objfile->obfd; | |
691 | struct cleanup *back_to; | |
c5aa993b | 692 | |
c906108c SS |
693 | current_objfile = objfile; |
694 | dbsize = dbfsize; | |
695 | dbbase = xmalloc (dbsize); | |
696 | dbroff = 0; | |
697 | if ((bfd_seek (abfd, dbfoff, SEEK_SET) != 0) || | |
3a42e9d0 | 698 | (bfd_bread (dbbase, dbsize, abfd) != dbsize)) |
c906108c | 699 | { |
b8c9b27d | 700 | xfree (dbbase); |
c906108c SS |
701 | error ("can't read DWARF data from '%s'", bfd_get_filename (abfd)); |
702 | } | |
b8c9b27d | 703 | back_to = make_cleanup (xfree, dbbase); |
c5aa993b | 704 | |
c906108c SS |
705 | /* If we are reinitializing, or if we have never loaded syms yet, init. |
706 | Since we have no idea how many DIES we are looking at, we just guess | |
707 | some arbitrary value. */ | |
c5aa993b | 708 | |
ef96bde8 EZ |
709 | if (mainline |
710 | || (objfile->global_psymbols.size == 0 | |
711 | && objfile->static_psymbols.size == 0)) | |
c906108c SS |
712 | { |
713 | init_psymbol_list (objfile, 1024); | |
714 | } | |
c5aa993b | 715 | |
c906108c SS |
716 | /* Save the relocation factor where everybody can see it. */ |
717 | ||
d4f3574e SS |
718 | base_section_offsets = objfile->section_offsets; |
719 | baseaddr = ANOFFSET (objfile->section_offsets, 0); | |
c906108c SS |
720 | |
721 | /* Follow the compilation unit sibling chain, building a partial symbol | |
722 | table entry for each one. Save enough information about each compilation | |
723 | unit to locate the full DWARF information later. */ | |
c5aa993b | 724 | |
c906108c | 725 | scan_compilation_units (dbbase, dbbase + dbsize, dbfoff, lnoffset, objfile); |
c5aa993b | 726 | |
c906108c SS |
727 | do_cleanups (back_to); |
728 | current_objfile = NULL; | |
729 | } | |
730 | ||
731 | /* | |
732 | ||
c5aa993b | 733 | LOCAL FUNCTION |
c906108c | 734 | |
c5aa993b | 735 | read_lexical_block_scope -- process all dies in a lexical block |
c906108c | 736 | |
c5aa993b | 737 | SYNOPSIS |
c906108c | 738 | |
c5aa993b JM |
739 | static void read_lexical_block_scope (struct dieinfo *dip, |
740 | char *thisdie, char *enddie) | |
c906108c | 741 | |
c5aa993b | 742 | DESCRIPTION |
c906108c | 743 | |
c5aa993b JM |
744 | Process all the DIES contained within a lexical block scope. |
745 | Start a new scope, process the dies, and then close the scope. | |
c906108c SS |
746 | |
747 | */ | |
748 | ||
749 | static void | |
fba45db2 KB |
750 | read_lexical_block_scope (struct dieinfo *dip, char *thisdie, char *enddie, |
751 | struct objfile *objfile) | |
c906108c SS |
752 | { |
753 | register struct context_stack *new; | |
754 | ||
c5aa993b JM |
755 | push_context (0, dip->at_low_pc); |
756 | process_dies (thisdie + dip->die_length, enddie, objfile); | |
c906108c SS |
757 | new = pop_context (); |
758 | if (local_symbols != NULL) | |
759 | { | |
c5aa993b JM |
760 | finish_block (0, &local_symbols, new->old_blocks, new->start_addr, |
761 | dip->at_high_pc, objfile); | |
c906108c | 762 | } |
c5aa993b | 763 | local_symbols = new->locals; |
c906108c SS |
764 | } |
765 | ||
766 | /* | |
767 | ||
c5aa993b | 768 | LOCAL FUNCTION |
c906108c | 769 | |
c5aa993b | 770 | lookup_utype -- look up a user defined type from die reference |
c906108c | 771 | |
c5aa993b | 772 | SYNOPSIS |
c906108c | 773 | |
c5aa993b | 774 | static type *lookup_utype (DIE_REF die_ref) |
c906108c | 775 | |
c5aa993b | 776 | DESCRIPTION |
c906108c | 777 | |
c5aa993b JM |
778 | Given a DIE reference, lookup the user defined type associated with |
779 | that DIE, if it has been registered already. If not registered, then | |
780 | return NULL. Alloc_utype() can be called to register an empty | |
781 | type for this reference, which will be filled in later when the | |
782 | actual referenced DIE is processed. | |
c906108c SS |
783 | */ |
784 | ||
785 | static struct type * | |
fba45db2 | 786 | lookup_utype (DIE_REF die_ref) |
c906108c SS |
787 | { |
788 | struct type *type = NULL; | |
789 | int utypeidx; | |
c5aa993b | 790 | |
c906108c SS |
791 | utypeidx = (die_ref - dbroff) / 4; |
792 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
793 | { | |
794 | complain (&bad_die_ref, DIE_ID, DIE_NAME); | |
795 | } | |
796 | else | |
797 | { | |
798 | type = *(utypes + utypeidx); | |
799 | } | |
800 | return (type); | |
801 | } | |
802 | ||
803 | ||
804 | /* | |
805 | ||
c5aa993b | 806 | LOCAL FUNCTION |
c906108c | 807 | |
c5aa993b | 808 | alloc_utype -- add a user defined type for die reference |
c906108c | 809 | |
c5aa993b | 810 | SYNOPSIS |
c906108c | 811 | |
c5aa993b | 812 | static type *alloc_utype (DIE_REF die_ref, struct type *utypep) |
c906108c | 813 | |
c5aa993b | 814 | DESCRIPTION |
c906108c | 815 | |
c5aa993b JM |
816 | Given a die reference DIE_REF, and a possible pointer to a user |
817 | defined type UTYPEP, register that this reference has a user | |
818 | defined type and either use the specified type in UTYPEP or | |
819 | make a new empty type that will be filled in later. | |
c906108c | 820 | |
c5aa993b JM |
821 | We should only be called after calling lookup_utype() to verify that |
822 | there is not currently a type registered for DIE_REF. | |
c906108c SS |
823 | */ |
824 | ||
825 | static struct type * | |
fba45db2 | 826 | alloc_utype (DIE_REF die_ref, struct type *utypep) |
c906108c SS |
827 | { |
828 | struct type **typep; | |
829 | int utypeidx; | |
c5aa993b | 830 | |
c906108c SS |
831 | utypeidx = (die_ref - dbroff) / 4; |
832 | typep = utypes + utypeidx; | |
833 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
834 | { | |
835 | utypep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
836 | complain (&bad_die_ref, DIE_ID, DIE_NAME); | |
837 | } | |
838 | else if (*typep != NULL) | |
839 | { | |
840 | utypep = *typep; | |
841 | complain (&dup_user_type_allocation, DIE_ID, DIE_NAME); | |
842 | } | |
843 | else | |
844 | { | |
845 | if (utypep == NULL) | |
846 | { | |
847 | utypep = alloc_type (current_objfile); | |
848 | } | |
849 | *typep = utypep; | |
850 | } | |
851 | return (utypep); | |
852 | } | |
853 | ||
854 | /* | |
855 | ||
c5aa993b | 856 | LOCAL FUNCTION |
c906108c | 857 | |
c5aa993b | 858 | free_utypes -- free the utypes array and reset pointer & count |
c906108c | 859 | |
c5aa993b | 860 | SYNOPSIS |
c906108c | 861 | |
c5aa993b | 862 | static void free_utypes (PTR dummy) |
c906108c | 863 | |
c5aa993b | 864 | DESCRIPTION |
c906108c | 865 | |
c5aa993b JM |
866 | Called via do_cleanups to free the utypes array, reset the pointer to NULL, |
867 | and set numutypes back to zero. This ensures that the utypes does not get | |
868 | referenced after being freed. | |
c906108c SS |
869 | */ |
870 | ||
871 | static void | |
fba45db2 | 872 | free_utypes (PTR dummy) |
c906108c | 873 | { |
b8c9b27d | 874 | xfree (utypes); |
c906108c SS |
875 | utypes = NULL; |
876 | numutypes = 0; | |
877 | } | |
878 | ||
879 | ||
880 | /* | |
881 | ||
c5aa993b | 882 | LOCAL FUNCTION |
c906108c | 883 | |
c5aa993b | 884 | decode_die_type -- return a type for a specified die |
c906108c | 885 | |
c5aa993b | 886 | SYNOPSIS |
c906108c | 887 | |
c5aa993b | 888 | static struct type *decode_die_type (struct dieinfo *dip) |
c906108c | 889 | |
c5aa993b | 890 | DESCRIPTION |
c906108c | 891 | |
c5aa993b JM |
892 | Given a pointer to a die information structure DIP, decode the |
893 | type of the die and return a pointer to the decoded type. All | |
894 | dies without specific types default to type int. | |
c906108c SS |
895 | */ |
896 | ||
897 | static struct type * | |
fba45db2 | 898 | decode_die_type (struct dieinfo *dip) |
c906108c SS |
899 | { |
900 | struct type *type = NULL; | |
c5aa993b JM |
901 | |
902 | if (dip->at_fund_type != 0) | |
c906108c | 903 | { |
c5aa993b | 904 | type = decode_fund_type (dip->at_fund_type); |
c906108c | 905 | } |
c5aa993b | 906 | else if (dip->at_mod_fund_type != NULL) |
c906108c | 907 | { |
c5aa993b | 908 | type = decode_mod_fund_type (dip->at_mod_fund_type); |
c906108c | 909 | } |
c5aa993b | 910 | else if (dip->at_user_def_type) |
c906108c | 911 | { |
c5aa993b | 912 | if ((type = lookup_utype (dip->at_user_def_type)) == NULL) |
c906108c | 913 | { |
c5aa993b | 914 | type = alloc_utype (dip->at_user_def_type, NULL); |
c906108c SS |
915 | } |
916 | } | |
c5aa993b | 917 | else if (dip->at_mod_u_d_type) |
c906108c | 918 | { |
c5aa993b | 919 | type = decode_mod_u_d_type (dip->at_mod_u_d_type); |
c906108c SS |
920 | } |
921 | else | |
922 | { | |
923 | type = dwarf_fundamental_type (current_objfile, FT_VOID); | |
924 | } | |
925 | return (type); | |
926 | } | |
927 | ||
928 | /* | |
929 | ||
c5aa993b | 930 | LOCAL FUNCTION |
c906108c | 931 | |
c5aa993b | 932 | struct_type -- compute and return the type for a struct or union |
c906108c | 933 | |
c5aa993b | 934 | SYNOPSIS |
c906108c | 935 | |
c5aa993b JM |
936 | static struct type *struct_type (struct dieinfo *dip, char *thisdie, |
937 | char *enddie, struct objfile *objfile) | |
c906108c | 938 | |
c5aa993b | 939 | DESCRIPTION |
c906108c | 940 | |
c5aa993b JM |
941 | Given pointer to a die information structure for a die which |
942 | defines a union or structure (and MUST define one or the other), | |
943 | and pointers to the raw die data that define the range of dies which | |
944 | define the members, compute and return the user defined type for the | |
945 | structure or union. | |
c906108c SS |
946 | */ |
947 | ||
948 | static struct type * | |
fba45db2 KB |
949 | struct_type (struct dieinfo *dip, char *thisdie, char *enddie, |
950 | struct objfile *objfile) | |
c906108c SS |
951 | { |
952 | struct type *type; | |
c5aa993b JM |
953 | struct nextfield |
954 | { | |
955 | struct nextfield *next; | |
956 | struct field field; | |
957 | }; | |
c906108c SS |
958 | struct nextfield *list = NULL; |
959 | struct nextfield *new; | |
960 | int nfields = 0; | |
961 | int n; | |
962 | struct dieinfo mbr; | |
963 | char *nextdie; | |
964 | int anonymous_size; | |
c5aa993b JM |
965 | |
966 | if ((type = lookup_utype (dip->die_ref)) == NULL) | |
c906108c SS |
967 | { |
968 | /* No forward references created an empty type, so install one now */ | |
c5aa993b | 969 | type = alloc_utype (dip->die_ref, NULL); |
c906108c | 970 | } |
c5aa993b JM |
971 | INIT_CPLUS_SPECIFIC (type); |
972 | switch (dip->die_tag) | |
c906108c | 973 | { |
c5aa993b JM |
974 | case TAG_class_type: |
975 | TYPE_CODE (type) = TYPE_CODE_CLASS; | |
976 | break; | |
977 | case TAG_structure_type: | |
978 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
979 | break; | |
980 | case TAG_union_type: | |
981 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
982 | break; | |
983 | default: | |
984 | /* Should never happen */ | |
985 | TYPE_CODE (type) = TYPE_CODE_UNDEF; | |
986 | complain (&missing_tag, DIE_ID, DIE_NAME); | |
987 | break; | |
c906108c SS |
988 | } |
989 | /* Some compilers try to be helpful by inventing "fake" names for | |
990 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
991 | Thanks, but no thanks... */ | |
c5aa993b JM |
992 | if (dip->at_name != NULL |
993 | && *dip->at_name != '~' | |
994 | && *dip->at_name != '.') | |
c906108c | 995 | { |
c5aa993b JM |
996 | TYPE_TAG_NAME (type) = obconcat (&objfile->type_obstack, |
997 | "", "", dip->at_name); | |
c906108c SS |
998 | } |
999 | /* Use whatever size is known. Zero is a valid size. We might however | |
1000 | wish to check has_at_byte_size to make sure that some byte size was | |
1001 | given explicitly, but DWARF doesn't specify that explicit sizes of | |
1002 | zero have to present, so complaining about missing sizes should | |
1003 | probably not be the default. */ | |
c5aa993b JM |
1004 | TYPE_LENGTH (type) = dip->at_byte_size; |
1005 | thisdie += dip->die_length; | |
c906108c SS |
1006 | while (thisdie < enddie) |
1007 | { | |
1008 | basicdieinfo (&mbr, thisdie, objfile); | |
1009 | completedieinfo (&mbr, objfile); | |
1010 | if (mbr.die_length <= SIZEOF_DIE_LENGTH) | |
1011 | { | |
1012 | break; | |
1013 | } | |
1014 | else if (mbr.at_sibling != 0) | |
1015 | { | |
1016 | nextdie = dbbase + mbr.at_sibling - dbroff; | |
1017 | } | |
1018 | else | |
1019 | { | |
1020 | nextdie = thisdie + mbr.die_length; | |
1021 | } | |
1022 | switch (mbr.die_tag) | |
1023 | { | |
1024 | case TAG_member: | |
1025 | /* Get space to record the next field's data. */ | |
1026 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
c5aa993b | 1027 | new->next = list; |
c906108c SS |
1028 | list = new; |
1029 | /* Save the data. */ | |
c5aa993b JM |
1030 | list->field.name = |
1031 | obsavestring (mbr.at_name, strlen (mbr.at_name), | |
1032 | &objfile->type_obstack); | |
c906108c SS |
1033 | FIELD_TYPE (list->field) = decode_die_type (&mbr); |
1034 | FIELD_BITPOS (list->field) = 8 * locval (&mbr); | |
1035 | /* Handle bit fields. */ | |
1036 | FIELD_BITSIZE (list->field) = mbr.at_bit_size; | |
1037 | if (BITS_BIG_ENDIAN) | |
1038 | { | |
1039 | /* For big endian bits, the at_bit_offset gives the | |
c5aa993b JM |
1040 | additional bit offset from the MSB of the containing |
1041 | anonymous object to the MSB of the field. We don't | |
1042 | have to do anything special since we don't need to | |
1043 | know the size of the anonymous object. */ | |
c906108c SS |
1044 | FIELD_BITPOS (list->field) += mbr.at_bit_offset; |
1045 | } | |
1046 | else | |
1047 | { | |
1048 | /* For little endian bits, we need to have a non-zero | |
c5aa993b JM |
1049 | at_bit_size, so that we know we are in fact dealing |
1050 | with a bitfield. Compute the bit offset to the MSB | |
1051 | of the anonymous object, subtract off the number of | |
1052 | bits from the MSB of the field to the MSB of the | |
1053 | object, and then subtract off the number of bits of | |
1054 | the field itself. The result is the bit offset of | |
1055 | the LSB of the field. */ | |
c906108c SS |
1056 | if (mbr.at_bit_size > 0) |
1057 | { | |
1058 | if (mbr.has_at_byte_size) | |
1059 | { | |
1060 | /* The size of the anonymous object containing | |
c5aa993b JM |
1061 | the bit field is explicit, so use the |
1062 | indicated size (in bytes). */ | |
c906108c SS |
1063 | anonymous_size = mbr.at_byte_size; |
1064 | } | |
1065 | else | |
1066 | { | |
1067 | /* The size of the anonymous object containing | |
c5aa993b JM |
1068 | the bit field matches the size of an object |
1069 | of the bit field's type. DWARF allows | |
1070 | at_byte_size to be left out in such cases, as | |
1071 | a debug information size optimization. */ | |
1072 | anonymous_size = TYPE_LENGTH (list->field.type); | |
c906108c SS |
1073 | } |
1074 | FIELD_BITPOS (list->field) += | |
1075 | anonymous_size * 8 - mbr.at_bit_offset - mbr.at_bit_size; | |
1076 | } | |
1077 | } | |
1078 | nfields++; | |
1079 | break; | |
1080 | default: | |
1081 | process_dies (thisdie, nextdie, objfile); | |
1082 | break; | |
1083 | } | |
1084 | thisdie = nextdie; | |
1085 | } | |
1086 | /* Now create the vector of fields, and record how big it is. We may | |
1087 | not even have any fields, if this DIE was generated due to a reference | |
1088 | to an anonymous structure or union. In this case, TYPE_FLAG_STUB is | |
1089 | set, which clues gdb in to the fact that it needs to search elsewhere | |
1090 | for the full structure definition. */ | |
1091 | if (nfields == 0) | |
1092 | { | |
1093 | TYPE_FLAGS (type) |= TYPE_FLAG_STUB; | |
1094 | } | |
1095 | else | |
1096 | { | |
1097 | TYPE_NFIELDS (type) = nfields; | |
1098 | TYPE_FIELDS (type) = (struct field *) | |
1099 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
1100 | /* Copy the saved-up fields into the field vector. */ | |
c5aa993b | 1101 | for (n = nfields; list; list = list->next) |
c906108c | 1102 | { |
c5aa993b JM |
1103 | TYPE_FIELD (type, --n) = list->field; |
1104 | } | |
c906108c SS |
1105 | } |
1106 | return (type); | |
1107 | } | |
1108 | ||
1109 | /* | |
1110 | ||
c5aa993b | 1111 | LOCAL FUNCTION |
c906108c | 1112 | |
c5aa993b | 1113 | read_structure_scope -- process all dies within struct or union |
c906108c | 1114 | |
c5aa993b | 1115 | SYNOPSIS |
c906108c | 1116 | |
c5aa993b JM |
1117 | static void read_structure_scope (struct dieinfo *dip, |
1118 | char *thisdie, char *enddie, struct objfile *objfile) | |
c906108c | 1119 | |
c5aa993b | 1120 | DESCRIPTION |
c906108c | 1121 | |
c5aa993b JM |
1122 | Called when we find the DIE that starts a structure or union |
1123 | scope (definition) to process all dies that define the members | |
1124 | of the structure or union. DIP is a pointer to the die info | |
1125 | struct for the DIE that names the structure or union. | |
c906108c | 1126 | |
c5aa993b JM |
1127 | NOTES |
1128 | ||
1129 | Note that we need to call struct_type regardless of whether or not | |
1130 | the DIE has an at_name attribute, since it might be an anonymous | |
1131 | structure or union. This gets the type entered into our set of | |
1132 | user defined types. | |
1133 | ||
1134 | However, if the structure is incomplete (an opaque struct/union) | |
1135 | then suppress creating a symbol table entry for it since gdb only | |
1136 | wants to find the one with the complete definition. Note that if | |
1137 | it is complete, we just call new_symbol, which does it's own | |
1138 | checking about whether the struct/union is anonymous or not (and | |
1139 | suppresses creating a symbol table entry itself). | |
c906108c | 1140 | |
c906108c SS |
1141 | */ |
1142 | ||
1143 | static void | |
fba45db2 KB |
1144 | read_structure_scope (struct dieinfo *dip, char *thisdie, char *enddie, |
1145 | struct objfile *objfile) | |
c906108c SS |
1146 | { |
1147 | struct type *type; | |
1148 | struct symbol *sym; | |
c5aa993b | 1149 | |
c906108c SS |
1150 | type = struct_type (dip, thisdie, enddie, objfile); |
1151 | if (!(TYPE_FLAGS (type) & TYPE_FLAG_STUB)) | |
1152 | { | |
1153 | sym = new_symbol (dip, objfile); | |
1154 | if (sym != NULL) | |
1155 | { | |
1156 | SYMBOL_TYPE (sym) = type; | |
1157 | if (cu_language == language_cplus) | |
1158 | { | |
1159 | synthesize_typedef (dip, objfile, type); | |
1160 | } | |
1161 | } | |
1162 | } | |
1163 | } | |
1164 | ||
1165 | /* | |
1166 | ||
c5aa993b | 1167 | LOCAL FUNCTION |
c906108c | 1168 | |
c5aa993b | 1169 | decode_array_element_type -- decode type of the array elements |
c906108c | 1170 | |
c5aa993b | 1171 | SYNOPSIS |
c906108c | 1172 | |
c5aa993b | 1173 | static struct type *decode_array_element_type (char *scan, char *end) |
c906108c | 1174 | |
c5aa993b | 1175 | DESCRIPTION |
c906108c | 1176 | |
c5aa993b JM |
1177 | As the last step in decoding the array subscript information for an |
1178 | array DIE, we need to decode the type of the array elements. We are | |
1179 | passed a pointer to this last part of the subscript information and | |
1180 | must return the appropriate type. If the type attribute is not | |
1181 | recognized, just warn about the problem and return type int. | |
c906108c SS |
1182 | */ |
1183 | ||
1184 | static struct type * | |
fba45db2 | 1185 | decode_array_element_type (char *scan) |
c906108c SS |
1186 | { |
1187 | struct type *typep; | |
1188 | DIE_REF die_ref; | |
1189 | unsigned short attribute; | |
1190 | unsigned short fundtype; | |
1191 | int nbytes; | |
c5aa993b | 1192 | |
c906108c SS |
1193 | attribute = target_to_host (scan, SIZEOF_ATTRIBUTE, GET_UNSIGNED, |
1194 | current_objfile); | |
1195 | scan += SIZEOF_ATTRIBUTE; | |
1196 | if ((nbytes = attribute_size (attribute)) == -1) | |
1197 | { | |
1198 | complain (&bad_array_element_type, DIE_ID, DIE_NAME, attribute); | |
1199 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1200 | } | |
1201 | else | |
1202 | { | |
1203 | switch (attribute) | |
1204 | { | |
c5aa993b JM |
1205 | case AT_fund_type: |
1206 | fundtype = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1207 | current_objfile); | |
1208 | typep = decode_fund_type (fundtype); | |
1209 | break; | |
1210 | case AT_mod_fund_type: | |
1211 | typep = decode_mod_fund_type (scan); | |
1212 | break; | |
1213 | case AT_user_def_type: | |
1214 | die_ref = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1215 | current_objfile); | |
1216 | if ((typep = lookup_utype (die_ref)) == NULL) | |
1217 | { | |
1218 | typep = alloc_utype (die_ref, NULL); | |
1219 | } | |
1220 | break; | |
1221 | case AT_mod_u_d_type: | |
1222 | typep = decode_mod_u_d_type (scan); | |
1223 | break; | |
1224 | default: | |
1225 | complain (&bad_array_element_type, DIE_ID, DIE_NAME, attribute); | |
1226 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1227 | break; | |
1228 | } | |
c906108c SS |
1229 | } |
1230 | return (typep); | |
1231 | } | |
1232 | ||
1233 | /* | |
1234 | ||
c5aa993b | 1235 | LOCAL FUNCTION |
c906108c | 1236 | |
c5aa993b | 1237 | decode_subscript_data_item -- decode array subscript item |
c906108c | 1238 | |
c5aa993b | 1239 | SYNOPSIS |
c906108c | 1240 | |
c5aa993b JM |
1241 | static struct type * |
1242 | decode_subscript_data_item (char *scan, char *end) | |
c906108c | 1243 | |
c5aa993b | 1244 | DESCRIPTION |
c906108c | 1245 | |
c5aa993b JM |
1246 | The array subscripts and the data type of the elements of an |
1247 | array are described by a list of data items, stored as a block | |
1248 | of contiguous bytes. There is a data item describing each array | |
1249 | dimension, and a final data item describing the element type. | |
1250 | The data items are ordered the same as their appearance in the | |
1251 | source (I.E. leftmost dimension first, next to leftmost second, | |
1252 | etc). | |
c906108c | 1253 | |
c5aa993b JM |
1254 | The data items describing each array dimension consist of four |
1255 | parts: (1) a format specifier, (2) type type of the subscript | |
1256 | index, (3) a description of the low bound of the array dimension, | |
1257 | and (4) a description of the high bound of the array dimension. | |
c906108c | 1258 | |
c5aa993b JM |
1259 | The last data item is the description of the type of each of |
1260 | the array elements. | |
c906108c | 1261 | |
c5aa993b JM |
1262 | We are passed a pointer to the start of the block of bytes |
1263 | containing the remaining data items, and a pointer to the first | |
1264 | byte past the data. This function recursively decodes the | |
1265 | remaining data items and returns a type. | |
c906108c | 1266 | |
c5aa993b JM |
1267 | If we somehow fail to decode some data, we complain about it |
1268 | and return a type "array of int". | |
c906108c | 1269 | |
c5aa993b JM |
1270 | BUGS |
1271 | FIXME: This code only implements the forms currently used | |
1272 | by the AT&T and GNU C compilers. | |
c906108c | 1273 | |
c5aa993b JM |
1274 | The end pointer is supplied for error checking, maybe we should |
1275 | use it for that... | |
c906108c SS |
1276 | */ |
1277 | ||
1278 | static struct type * | |
fba45db2 | 1279 | decode_subscript_data_item (char *scan, char *end) |
c906108c SS |
1280 | { |
1281 | struct type *typep = NULL; /* Array type we are building */ | |
1282 | struct type *nexttype; /* Type of each element (may be array) */ | |
1283 | struct type *indextype; /* Type of this index */ | |
1284 | struct type *rangetype; | |
1285 | unsigned int format; | |
1286 | unsigned short fundtype; | |
1287 | unsigned long lowbound; | |
1288 | unsigned long highbound; | |
1289 | int nbytes; | |
c5aa993b | 1290 | |
c906108c SS |
1291 | format = target_to_host (scan, SIZEOF_FORMAT_SPECIFIER, GET_UNSIGNED, |
1292 | current_objfile); | |
1293 | scan += SIZEOF_FORMAT_SPECIFIER; | |
1294 | switch (format) | |
1295 | { | |
1296 | case FMT_ET: | |
1297 | typep = decode_array_element_type (scan); | |
1298 | break; | |
1299 | case FMT_FT_C_C: | |
1300 | fundtype = target_to_host (scan, SIZEOF_FMT_FT, GET_UNSIGNED, | |
1301 | current_objfile); | |
1302 | indextype = decode_fund_type (fundtype); | |
1303 | scan += SIZEOF_FMT_FT; | |
1304 | nbytes = TARGET_FT_LONG_SIZE (current_objfile); | |
1305 | lowbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1306 | scan += nbytes; | |
1307 | highbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1308 | scan += nbytes; | |
1309 | nexttype = decode_subscript_data_item (scan, end); | |
1310 | if (nexttype == NULL) | |
1311 | { | |
1312 | /* Munged subscript data or other problem, fake it. */ | |
1313 | complain (&subscript_data_items, DIE_ID, DIE_NAME); | |
1314 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1315 | } | |
1316 | rangetype = create_range_type ((struct type *) NULL, indextype, | |
c5aa993b | 1317 | lowbound, highbound); |
c906108c SS |
1318 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); |
1319 | break; | |
1320 | case FMT_FT_C_X: | |
1321 | case FMT_FT_X_C: | |
1322 | case FMT_FT_X_X: | |
1323 | case FMT_UT_C_C: | |
1324 | case FMT_UT_C_X: | |
1325 | case FMT_UT_X_C: | |
1326 | case FMT_UT_X_X: | |
1327 | complain (&unhandled_array_subscript_format, DIE_ID, DIE_NAME, format); | |
1328 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1329 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1330 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
1331 | break; | |
1332 | default: | |
1333 | complain (&unknown_array_subscript_format, DIE_ID, DIE_NAME, format); | |
1334 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1335 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1336 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
1337 | break; | |
1338 | } | |
1339 | return (typep); | |
1340 | } | |
1341 | ||
1342 | /* | |
1343 | ||
c5aa993b | 1344 | LOCAL FUNCTION |
c906108c | 1345 | |
c5aa993b | 1346 | dwarf_read_array_type -- read TAG_array_type DIE |
c906108c | 1347 | |
c5aa993b | 1348 | SYNOPSIS |
c906108c | 1349 | |
c5aa993b | 1350 | static void dwarf_read_array_type (struct dieinfo *dip) |
c906108c | 1351 | |
c5aa993b | 1352 | DESCRIPTION |
c906108c | 1353 | |
c5aa993b JM |
1354 | Extract all information from a TAG_array_type DIE and add to |
1355 | the user defined type vector. | |
c906108c SS |
1356 | */ |
1357 | ||
1358 | static void | |
fba45db2 | 1359 | dwarf_read_array_type (struct dieinfo *dip) |
c906108c SS |
1360 | { |
1361 | struct type *type; | |
1362 | struct type *utype; | |
1363 | char *sub; | |
1364 | char *subend; | |
1365 | unsigned short blocksz; | |
1366 | int nbytes; | |
c5aa993b JM |
1367 | |
1368 | if (dip->at_ordering != ORD_row_major) | |
c906108c SS |
1369 | { |
1370 | /* FIXME: Can gdb even handle column major arrays? */ | |
1371 | complain (¬_row_major, DIE_ID, DIE_NAME); | |
1372 | } | |
c5aa993b | 1373 | if ((sub = dip->at_subscr_data) != NULL) |
c906108c SS |
1374 | { |
1375 | nbytes = attribute_size (AT_subscr_data); | |
1376 | blocksz = target_to_host (sub, nbytes, GET_UNSIGNED, current_objfile); | |
1377 | subend = sub + nbytes + blocksz; | |
1378 | sub += nbytes; | |
1379 | type = decode_subscript_data_item (sub, subend); | |
c5aa993b | 1380 | if ((utype = lookup_utype (dip->die_ref)) == NULL) |
c906108c SS |
1381 | { |
1382 | /* Install user defined type that has not been referenced yet. */ | |
c5aa993b | 1383 | alloc_utype (dip->die_ref, type); |
c906108c SS |
1384 | } |
1385 | else if (TYPE_CODE (utype) == TYPE_CODE_UNDEF) | |
1386 | { | |
1387 | /* Ick! A forward ref has already generated a blank type in our | |
1388 | slot, and this type probably already has things pointing to it | |
1389 | (which is what caused it to be created in the first place). | |
1390 | If it's just a place holder we can plop our fully defined type | |
1391 | on top of it. We can't recover the space allocated for our | |
1392 | new type since it might be on an obstack, but we could reuse | |
1393 | it if we kept a list of them, but it might not be worth it | |
1394 | (FIXME). */ | |
1395 | *utype = *type; | |
1396 | } | |
1397 | else | |
1398 | { | |
1399 | /* Double ick! Not only is a type already in our slot, but | |
1400 | someone has decorated it. Complain and leave it alone. */ | |
1401 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); | |
1402 | } | |
1403 | } | |
1404 | } | |
1405 | ||
1406 | /* | |
1407 | ||
c5aa993b | 1408 | LOCAL FUNCTION |
c906108c | 1409 | |
c5aa993b | 1410 | read_tag_pointer_type -- read TAG_pointer_type DIE |
c906108c | 1411 | |
c5aa993b | 1412 | SYNOPSIS |
c906108c | 1413 | |
c5aa993b | 1414 | static void read_tag_pointer_type (struct dieinfo *dip) |
c906108c | 1415 | |
c5aa993b | 1416 | DESCRIPTION |
c906108c | 1417 | |
c5aa993b JM |
1418 | Extract all information from a TAG_pointer_type DIE and add to |
1419 | the user defined type vector. | |
c906108c SS |
1420 | */ |
1421 | ||
1422 | static void | |
fba45db2 | 1423 | read_tag_pointer_type (struct dieinfo *dip) |
c906108c SS |
1424 | { |
1425 | struct type *type; | |
1426 | struct type *utype; | |
c5aa993b | 1427 | |
c906108c | 1428 | type = decode_die_type (dip); |
c5aa993b | 1429 | if ((utype = lookup_utype (dip->die_ref)) == NULL) |
c906108c SS |
1430 | { |
1431 | utype = lookup_pointer_type (type); | |
c5aa993b | 1432 | alloc_utype (dip->die_ref, utype); |
c906108c SS |
1433 | } |
1434 | else | |
1435 | { | |
1436 | TYPE_TARGET_TYPE (utype) = type; | |
1437 | TYPE_POINTER_TYPE (type) = utype; | |
1438 | ||
1439 | /* We assume the machine has only one representation for pointers! */ | |
1440 | /* FIXME: Possably a poor assumption */ | |
c5aa993b | 1441 | TYPE_LENGTH (utype) = TARGET_PTR_BIT / TARGET_CHAR_BIT; |
c906108c SS |
1442 | TYPE_CODE (utype) = TYPE_CODE_PTR; |
1443 | } | |
1444 | } | |
1445 | ||
1446 | /* | |
1447 | ||
c5aa993b | 1448 | LOCAL FUNCTION |
c906108c | 1449 | |
c5aa993b | 1450 | read_tag_string_type -- read TAG_string_type DIE |
c906108c | 1451 | |
c5aa993b | 1452 | SYNOPSIS |
c906108c | 1453 | |
c5aa993b | 1454 | static void read_tag_string_type (struct dieinfo *dip) |
c906108c | 1455 | |
c5aa993b | 1456 | DESCRIPTION |
c906108c | 1457 | |
c5aa993b JM |
1458 | Extract all information from a TAG_string_type DIE and add to |
1459 | the user defined type vector. It isn't really a user defined | |
1460 | type, but it behaves like one, with other DIE's using an | |
1461 | AT_user_def_type attribute to reference it. | |
c906108c SS |
1462 | */ |
1463 | ||
1464 | static void | |
fba45db2 | 1465 | read_tag_string_type (struct dieinfo *dip) |
c906108c SS |
1466 | { |
1467 | struct type *utype; | |
1468 | struct type *indextype; | |
1469 | struct type *rangetype; | |
1470 | unsigned long lowbound = 0; | |
1471 | unsigned long highbound; | |
1472 | ||
c5aa993b | 1473 | if (dip->has_at_byte_size) |
c906108c SS |
1474 | { |
1475 | /* A fixed bounds string */ | |
c5aa993b | 1476 | highbound = dip->at_byte_size - 1; |
c906108c SS |
1477 | } |
1478 | else | |
1479 | { | |
1480 | /* A varying length string. Stub for now. (FIXME) */ | |
1481 | highbound = 1; | |
1482 | } | |
1483 | indextype = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1484 | rangetype = create_range_type ((struct type *) NULL, indextype, lowbound, | |
1485 | highbound); | |
c5aa993b JM |
1486 | |
1487 | utype = lookup_utype (dip->die_ref); | |
c906108c SS |
1488 | if (utype == NULL) |
1489 | { | |
1490 | /* No type defined, go ahead and create a blank one to use. */ | |
c5aa993b | 1491 | utype = alloc_utype (dip->die_ref, (struct type *) NULL); |
c906108c SS |
1492 | } |
1493 | else | |
1494 | { | |
1495 | /* Already a type in our slot due to a forward reference. Make sure it | |
c5aa993b | 1496 | is a blank one. If not, complain and leave it alone. */ |
c906108c SS |
1497 | if (TYPE_CODE (utype) != TYPE_CODE_UNDEF) |
1498 | { | |
1499 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); | |
1500 | return; | |
1501 | } | |
1502 | } | |
1503 | ||
1504 | /* Create the string type using the blank type we either found or created. */ | |
1505 | utype = create_string_type (utype, rangetype); | |
1506 | } | |
1507 | ||
1508 | /* | |
1509 | ||
c5aa993b | 1510 | LOCAL FUNCTION |
c906108c | 1511 | |
c5aa993b | 1512 | read_subroutine_type -- process TAG_subroutine_type dies |
c906108c | 1513 | |
c5aa993b | 1514 | SYNOPSIS |
c906108c | 1515 | |
c5aa993b JM |
1516 | static void read_subroutine_type (struct dieinfo *dip, char thisdie, |
1517 | char *enddie) | |
c906108c | 1518 | |
c5aa993b | 1519 | DESCRIPTION |
c906108c | 1520 | |
c5aa993b | 1521 | Handle DIES due to C code like: |
c906108c | 1522 | |
c5aa993b JM |
1523 | struct foo { |
1524 | int (*funcp)(int a, long l); (Generates TAG_subroutine_type DIE) | |
1525 | int b; | |
1526 | }; | |
c906108c | 1527 | |
c5aa993b | 1528 | NOTES |
c906108c | 1529 | |
c5aa993b JM |
1530 | The parameter DIES are currently ignored. See if gdb has a way to |
1531 | include this info in it's type system, and decode them if so. Is | |
1532 | this what the type structure's "arg_types" field is for? (FIXME) | |
c906108c SS |
1533 | */ |
1534 | ||
1535 | static void | |
fba45db2 | 1536 | read_subroutine_type (struct dieinfo *dip, char *thisdie, char *enddie) |
c906108c SS |
1537 | { |
1538 | struct type *type; /* Type that this function returns */ | |
1539 | struct type *ftype; /* Function that returns above type */ | |
c5aa993b | 1540 | |
c906108c SS |
1541 | /* Decode the type that this subroutine returns */ |
1542 | ||
1543 | type = decode_die_type (dip); | |
1544 | ||
1545 | /* Check to see if we already have a partially constructed user | |
1546 | defined type for this DIE, from a forward reference. */ | |
1547 | ||
c5aa993b | 1548 | if ((ftype = lookup_utype (dip->die_ref)) == NULL) |
c906108c SS |
1549 | { |
1550 | /* This is the first reference to one of these types. Make | |
c5aa993b | 1551 | a new one and place it in the user defined types. */ |
c906108c | 1552 | ftype = lookup_function_type (type); |
c5aa993b | 1553 | alloc_utype (dip->die_ref, ftype); |
c906108c SS |
1554 | } |
1555 | else if (TYPE_CODE (ftype) == TYPE_CODE_UNDEF) | |
1556 | { | |
1557 | /* We have an existing partially constructed type, so bash it | |
c5aa993b | 1558 | into the correct type. */ |
c906108c SS |
1559 | TYPE_TARGET_TYPE (ftype) = type; |
1560 | TYPE_LENGTH (ftype) = 1; | |
1561 | TYPE_CODE (ftype) = TYPE_CODE_FUNC; | |
1562 | } | |
1563 | else | |
1564 | { | |
1565 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | /* | |
1570 | ||
c5aa993b | 1571 | LOCAL FUNCTION |
c906108c | 1572 | |
c5aa993b | 1573 | read_enumeration -- process dies which define an enumeration |
c906108c | 1574 | |
c5aa993b | 1575 | SYNOPSIS |
c906108c | 1576 | |
c5aa993b JM |
1577 | static void read_enumeration (struct dieinfo *dip, char *thisdie, |
1578 | char *enddie, struct objfile *objfile) | |
c906108c | 1579 | |
c5aa993b | 1580 | DESCRIPTION |
c906108c | 1581 | |
c5aa993b JM |
1582 | Given a pointer to a die which begins an enumeration, process all |
1583 | the dies that define the members of the enumeration. | |
c906108c | 1584 | |
c5aa993b | 1585 | NOTES |
c906108c | 1586 | |
c5aa993b JM |
1587 | Note that we need to call enum_type regardless of whether or not we |
1588 | have a symbol, since we might have an enum without a tag name (thus | |
1589 | no symbol for the tagname). | |
c906108c SS |
1590 | */ |
1591 | ||
1592 | static void | |
fba45db2 KB |
1593 | read_enumeration (struct dieinfo *dip, char *thisdie, char *enddie, |
1594 | struct objfile *objfile) | |
c906108c SS |
1595 | { |
1596 | struct type *type; | |
1597 | struct symbol *sym; | |
c5aa993b | 1598 | |
c906108c SS |
1599 | type = enum_type (dip, objfile); |
1600 | sym = new_symbol (dip, objfile); | |
1601 | if (sym != NULL) | |
1602 | { | |
1603 | SYMBOL_TYPE (sym) = type; | |
1604 | if (cu_language == language_cplus) | |
1605 | { | |
1606 | synthesize_typedef (dip, objfile, type); | |
1607 | } | |
1608 | } | |
1609 | } | |
1610 | ||
1611 | /* | |
1612 | ||
c5aa993b | 1613 | LOCAL FUNCTION |
c906108c | 1614 | |
c5aa993b | 1615 | enum_type -- decode and return a type for an enumeration |
c906108c | 1616 | |
c5aa993b | 1617 | SYNOPSIS |
c906108c | 1618 | |
c5aa993b | 1619 | static type *enum_type (struct dieinfo *dip, struct objfile *objfile) |
c906108c | 1620 | |
c5aa993b | 1621 | DESCRIPTION |
c906108c | 1622 | |
c5aa993b JM |
1623 | Given a pointer to a die information structure for the die which |
1624 | starts an enumeration, process all the dies that define the members | |
1625 | of the enumeration and return a type pointer for the enumeration. | |
c906108c | 1626 | |
c5aa993b JM |
1627 | At the same time, for each member of the enumeration, create a |
1628 | symbol for it with namespace VAR_NAMESPACE and class LOC_CONST, | |
1629 | and give it the type of the enumeration itself. | |
c906108c | 1630 | |
c5aa993b | 1631 | NOTES |
c906108c | 1632 | |
c5aa993b JM |
1633 | Note that the DWARF specification explicitly mandates that enum |
1634 | constants occur in reverse order from the source program order, | |
1635 | for "consistency" and because this ordering is easier for many | |
1636 | compilers to generate. (Draft 6, sec 3.8.5, Enumeration type | |
1637 | Entries). Because gdb wants to see the enum members in program | |
1638 | source order, we have to ensure that the order gets reversed while | |
1639 | we are processing them. | |
c906108c SS |
1640 | */ |
1641 | ||
1642 | static struct type * | |
fba45db2 | 1643 | enum_type (struct dieinfo *dip, struct objfile *objfile) |
c906108c SS |
1644 | { |
1645 | struct type *type; | |
c5aa993b JM |
1646 | struct nextfield |
1647 | { | |
1648 | struct nextfield *next; | |
1649 | struct field field; | |
1650 | }; | |
c906108c SS |
1651 | struct nextfield *list = NULL; |
1652 | struct nextfield *new; | |
1653 | int nfields = 0; | |
1654 | int n; | |
1655 | char *scan; | |
1656 | char *listend; | |
1657 | unsigned short blocksz; | |
1658 | struct symbol *sym; | |
1659 | int nbytes; | |
1660 | int unsigned_enum = 1; | |
c5aa993b JM |
1661 | |
1662 | if ((type = lookup_utype (dip->die_ref)) == NULL) | |
c906108c SS |
1663 | { |
1664 | /* No forward references created an empty type, so install one now */ | |
c5aa993b | 1665 | type = alloc_utype (dip->die_ref, NULL); |
c906108c SS |
1666 | } |
1667 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
1668 | /* Some compilers try to be helpful by inventing "fake" names for | |
1669 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1670 | Thanks, but no thanks... */ | |
c5aa993b JM |
1671 | if (dip->at_name != NULL |
1672 | && *dip->at_name != '~' | |
1673 | && *dip->at_name != '.') | |
c906108c | 1674 | { |
c5aa993b JM |
1675 | TYPE_TAG_NAME (type) = obconcat (&objfile->type_obstack, |
1676 | "", "", dip->at_name); | |
c906108c | 1677 | } |
c5aa993b | 1678 | if (dip->at_byte_size != 0) |
c906108c | 1679 | { |
c5aa993b | 1680 | TYPE_LENGTH (type) = dip->at_byte_size; |
c906108c | 1681 | } |
c5aa993b | 1682 | if ((scan = dip->at_element_list) != NULL) |
c906108c | 1683 | { |
c5aa993b | 1684 | if (dip->short_element_list) |
c906108c SS |
1685 | { |
1686 | nbytes = attribute_size (AT_short_element_list); | |
1687 | } | |
1688 | else | |
1689 | { | |
1690 | nbytes = attribute_size (AT_element_list); | |
1691 | } | |
1692 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); | |
1693 | listend = scan + nbytes + blocksz; | |
1694 | scan += nbytes; | |
1695 | while (scan < listend) | |
1696 | { | |
1697 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
c5aa993b | 1698 | new->next = list; |
c906108c SS |
1699 | list = new; |
1700 | FIELD_TYPE (list->field) = NULL; | |
1701 | FIELD_BITSIZE (list->field) = 0; | |
1702 | FIELD_BITPOS (list->field) = | |
1703 | target_to_host (scan, TARGET_FT_LONG_SIZE (objfile), GET_SIGNED, | |
1704 | objfile); | |
1705 | scan += TARGET_FT_LONG_SIZE (objfile); | |
c5aa993b JM |
1706 | list->field.name = obsavestring (scan, strlen (scan), |
1707 | &objfile->type_obstack); | |
c906108c SS |
1708 | scan += strlen (scan) + 1; |
1709 | nfields++; | |
1710 | /* Handcraft a new symbol for this enum member. */ | |
1711 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, | |
1712 | sizeof (struct symbol)); | |
1713 | memset (sym, 0, sizeof (struct symbol)); | |
c5aa993b | 1714 | SYMBOL_NAME (sym) = create_name (list->field.name, |
c906108c SS |
1715 | &objfile->symbol_obstack); |
1716 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); | |
1717 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1718 | SYMBOL_CLASS (sym) = LOC_CONST; | |
1719 | SYMBOL_TYPE (sym) = type; | |
1720 | SYMBOL_VALUE (sym) = FIELD_BITPOS (list->field); | |
1721 | if (SYMBOL_VALUE (sym) < 0) | |
1722 | unsigned_enum = 0; | |
1723 | add_symbol_to_list (sym, list_in_scope); | |
1724 | } | |
1725 | /* Now create the vector of fields, and record how big it is. This is | |
c5aa993b JM |
1726 | where we reverse the order, by pulling the members off the list in |
1727 | reverse order from how they were inserted. If we have no fields | |
1728 | (this is apparently possible in C++) then skip building a field | |
1729 | vector. */ | |
c906108c SS |
1730 | if (nfields > 0) |
1731 | { | |
1732 | if (unsigned_enum) | |
1733 | TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED; | |
1734 | TYPE_NFIELDS (type) = nfields; | |
1735 | TYPE_FIELDS (type) = (struct field *) | |
1736 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct field) * nfields); | |
1737 | /* Copy the saved-up fields into the field vector. */ | |
c5aa993b | 1738 | for (n = 0; (n < nfields) && (list != NULL); list = list->next) |
c906108c | 1739 | { |
c5aa993b JM |
1740 | TYPE_FIELD (type, n++) = list->field; |
1741 | } | |
c906108c SS |
1742 | } |
1743 | } | |
1744 | return (type); | |
1745 | } | |
1746 | ||
1747 | /* | |
1748 | ||
c5aa993b | 1749 | LOCAL FUNCTION |
c906108c | 1750 | |
c5aa993b | 1751 | read_func_scope -- process all dies within a function scope |
c906108c | 1752 | |
c5aa993b | 1753 | DESCRIPTION |
c906108c | 1754 | |
c5aa993b JM |
1755 | Process all dies within a given function scope. We are passed |
1756 | a die information structure pointer DIP for the die which | |
1757 | starts the function scope, and pointers into the raw die data | |
1758 | that define the dies within the function scope. | |
1759 | ||
1760 | For now, we ignore lexical block scopes within the function. | |
1761 | The problem is that AT&T cc does not define a DWARF lexical | |
1762 | block scope for the function itself, while gcc defines a | |
1763 | lexical block scope for the function. We need to think about | |
1764 | how to handle this difference, or if it is even a problem. | |
1765 | (FIXME) | |
c906108c SS |
1766 | */ |
1767 | ||
1768 | static void | |
fba45db2 KB |
1769 | read_func_scope (struct dieinfo *dip, char *thisdie, char *enddie, |
1770 | struct objfile *objfile) | |
c906108c SS |
1771 | { |
1772 | register struct context_stack *new; | |
c5aa993b | 1773 | |
c906108c SS |
1774 | /* AT_name is absent if the function is described with an |
1775 | AT_abstract_origin tag. | |
1776 | Ignore the function description for now to avoid GDB core dumps. | |
1777 | FIXME: Add code to handle AT_abstract_origin tags properly. */ | |
c5aa993b | 1778 | if (dip->at_name == NULL) |
c906108c SS |
1779 | { |
1780 | complain (&missing_at_name, DIE_ID); | |
1781 | return; | |
1782 | } | |
1783 | ||
c5aa993b JM |
1784 | if (objfile->ei.entry_point >= dip->at_low_pc && |
1785 | objfile->ei.entry_point < dip->at_high_pc) | |
c906108c | 1786 | { |
c5aa993b JM |
1787 | objfile->ei.entry_func_lowpc = dip->at_low_pc; |
1788 | objfile->ei.entry_func_highpc = dip->at_high_pc; | |
c906108c | 1789 | } |
c5aa993b JM |
1790 | new = push_context (0, dip->at_low_pc); |
1791 | new->name = new_symbol (dip, objfile); | |
c906108c | 1792 | list_in_scope = &local_symbols; |
c5aa993b | 1793 | process_dies (thisdie + dip->die_length, enddie, objfile); |
c906108c SS |
1794 | new = pop_context (); |
1795 | /* Make a block for the local symbols within. */ | |
c5aa993b JM |
1796 | finish_block (new->name, &local_symbols, new->old_blocks, |
1797 | new->start_addr, dip->at_high_pc, objfile); | |
c906108c SS |
1798 | list_in_scope = &file_symbols; |
1799 | } | |
1800 | ||
1801 | ||
1802 | /* | |
1803 | ||
c5aa993b | 1804 | LOCAL FUNCTION |
c906108c | 1805 | |
c5aa993b | 1806 | handle_producer -- process the AT_producer attribute |
c906108c | 1807 | |
c5aa993b | 1808 | DESCRIPTION |
c906108c | 1809 | |
c5aa993b JM |
1810 | Perform any operations that depend on finding a particular |
1811 | AT_producer attribute. | |
c906108c SS |
1812 | |
1813 | */ | |
1814 | ||
1815 | static void | |
fba45db2 | 1816 | handle_producer (char *producer) |
c906108c SS |
1817 | { |
1818 | ||
1819 | /* If this compilation unit was compiled with g++ or gcc, then set the | |
1820 | processing_gcc_compilation flag. */ | |
1821 | ||
1822 | if (STREQN (producer, GCC_PRODUCER, strlen (GCC_PRODUCER))) | |
1823 | { | |
1824 | char version = producer[strlen (GCC_PRODUCER)]; | |
1825 | processing_gcc_compilation = (version == '2' ? 2 : 1); | |
1826 | } | |
1827 | else | |
1828 | { | |
1829 | processing_gcc_compilation = | |
1830 | STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER)) | |
1831 | || STREQN (producer, CHILL_PRODUCER, strlen (CHILL_PRODUCER)); | |
1832 | } | |
1833 | ||
1834 | /* Select a demangling style if we can identify the producer and if | |
1835 | the current style is auto. We leave the current style alone if it | |
1836 | is not auto. We also leave the demangling style alone if we find a | |
1837 | gcc (cc1) producer, as opposed to a g++ (cc1plus) producer. */ | |
1838 | ||
1839 | if (AUTO_DEMANGLING) | |
1840 | { | |
1841 | if (STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER))) | |
1842 | { | |
8052a17a JM |
1843 | #if 0 |
1844 | /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't | |
1845 | know whether it will use the old style or v3 mangling. */ | |
c906108c | 1846 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); |
8052a17a | 1847 | #endif |
c906108c SS |
1848 | } |
1849 | else if (STREQN (producer, LCC_PRODUCER, strlen (LCC_PRODUCER))) | |
1850 | { | |
1851 | set_demangling_style (LUCID_DEMANGLING_STYLE_STRING); | |
1852 | } | |
1853 | } | |
1854 | } | |
1855 | ||
1856 | ||
1857 | /* | |
1858 | ||
c5aa993b | 1859 | LOCAL FUNCTION |
c906108c | 1860 | |
c5aa993b | 1861 | read_file_scope -- process all dies within a file scope |
c906108c | 1862 | |
c5aa993b JM |
1863 | DESCRIPTION |
1864 | ||
1865 | Process all dies within a given file scope. We are passed a | |
1866 | pointer to the die information structure for the die which | |
1867 | starts the file scope, and pointers into the raw die data which | |
1868 | mark the range of dies within the file scope. | |
c906108c | 1869 | |
c5aa993b JM |
1870 | When the partial symbol table is built, the file offset for the line |
1871 | number table for each compilation unit is saved in the partial symbol | |
1872 | table entry for that compilation unit. As the symbols for each | |
1873 | compilation unit are read, the line number table is read into memory | |
1874 | and the variable lnbase is set to point to it. Thus all we have to | |
1875 | do is use lnbase to access the line number table for the current | |
1876 | compilation unit. | |
c906108c SS |
1877 | */ |
1878 | ||
1879 | static void | |
fba45db2 KB |
1880 | read_file_scope (struct dieinfo *dip, char *thisdie, char *enddie, |
1881 | struct objfile *objfile) | |
c906108c SS |
1882 | { |
1883 | struct cleanup *back_to; | |
1884 | struct symtab *symtab; | |
c5aa993b JM |
1885 | |
1886 | if (objfile->ei.entry_point >= dip->at_low_pc && | |
1887 | objfile->ei.entry_point < dip->at_high_pc) | |
c906108c | 1888 | { |
c5aa993b JM |
1889 | objfile->ei.entry_file_lowpc = dip->at_low_pc; |
1890 | objfile->ei.entry_file_highpc = dip->at_high_pc; | |
c906108c SS |
1891 | } |
1892 | set_cu_language (dip); | |
c5aa993b | 1893 | if (dip->at_producer != NULL) |
c906108c | 1894 | { |
c5aa993b | 1895 | handle_producer (dip->at_producer); |
c906108c SS |
1896 | } |
1897 | numutypes = (enddie - thisdie) / 4; | |
1898 | utypes = (struct type **) xmalloc (numutypes * sizeof (struct type *)); | |
1899 | back_to = make_cleanup (free_utypes, NULL); | |
1900 | memset (utypes, 0, numutypes * sizeof (struct type *)); | |
1901 | memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *)); | |
c5aa993b | 1902 | start_symtab (dip->at_name, dip->at_comp_dir, dip->at_low_pc); |
c906108c SS |
1903 | record_debugformat ("DWARF 1"); |
1904 | decode_line_numbers (lnbase); | |
c5aa993b | 1905 | process_dies (thisdie + dip->die_length, enddie, objfile); |
c906108c | 1906 | |
c5aa993b | 1907 | symtab = end_symtab (dip->at_high_pc, objfile, 0); |
c906108c SS |
1908 | if (symtab != NULL) |
1909 | { | |
c5aa993b JM |
1910 | symtab->language = cu_language; |
1911 | } | |
c906108c SS |
1912 | do_cleanups (back_to); |
1913 | } | |
1914 | ||
1915 | /* | |
1916 | ||
c5aa993b | 1917 | LOCAL FUNCTION |
c906108c | 1918 | |
c5aa993b | 1919 | process_dies -- process a range of DWARF Information Entries |
c906108c | 1920 | |
c5aa993b | 1921 | SYNOPSIS |
c906108c | 1922 | |
c5aa993b JM |
1923 | static void process_dies (char *thisdie, char *enddie, |
1924 | struct objfile *objfile) | |
c906108c | 1925 | |
c5aa993b | 1926 | DESCRIPTION |
c906108c | 1927 | |
c5aa993b JM |
1928 | Process all DIE's in a specified range. May be (and almost |
1929 | certainly will be) called recursively. | |
c906108c SS |
1930 | */ |
1931 | ||
1932 | static void | |
fba45db2 | 1933 | process_dies (char *thisdie, char *enddie, struct objfile *objfile) |
c906108c SS |
1934 | { |
1935 | char *nextdie; | |
1936 | struct dieinfo di; | |
c5aa993b | 1937 | |
c906108c SS |
1938 | while (thisdie < enddie) |
1939 | { | |
1940 | basicdieinfo (&di, thisdie, objfile); | |
1941 | if (di.die_length < SIZEOF_DIE_LENGTH) | |
1942 | { | |
1943 | break; | |
1944 | } | |
1945 | else if (di.die_tag == TAG_padding) | |
1946 | { | |
1947 | nextdie = thisdie + di.die_length; | |
1948 | } | |
1949 | else | |
1950 | { | |
1951 | completedieinfo (&di, objfile); | |
1952 | if (di.at_sibling != 0) | |
1953 | { | |
1954 | nextdie = dbbase + di.at_sibling - dbroff; | |
1955 | } | |
1956 | else | |
1957 | { | |
1958 | nextdie = thisdie + di.die_length; | |
1959 | } | |
1960 | #ifdef SMASH_TEXT_ADDRESS | |
1961 | /* I think that these are always text, not data, addresses. */ | |
1962 | SMASH_TEXT_ADDRESS (di.at_low_pc); | |
1963 | SMASH_TEXT_ADDRESS (di.at_high_pc); | |
1964 | #endif | |
1965 | switch (di.die_tag) | |
1966 | { | |
1967 | case TAG_compile_unit: | |
1968 | /* Skip Tag_compile_unit if we are already inside a compilation | |
c5aa993b JM |
1969 | unit, we are unable to handle nested compilation units |
1970 | properly (FIXME). */ | |
c906108c SS |
1971 | if (current_subfile == NULL) |
1972 | read_file_scope (&di, thisdie, nextdie, objfile); | |
1973 | else | |
1974 | nextdie = thisdie + di.die_length; | |
1975 | break; | |
1976 | case TAG_global_subroutine: | |
1977 | case TAG_subroutine: | |
1978 | if (di.has_at_low_pc) | |
1979 | { | |
1980 | read_func_scope (&di, thisdie, nextdie, objfile); | |
1981 | } | |
1982 | break; | |
1983 | case TAG_lexical_block: | |
1984 | read_lexical_block_scope (&di, thisdie, nextdie, objfile); | |
1985 | break; | |
1986 | case TAG_class_type: | |
1987 | case TAG_structure_type: | |
1988 | case TAG_union_type: | |
1989 | read_structure_scope (&di, thisdie, nextdie, objfile); | |
1990 | break; | |
1991 | case TAG_enumeration_type: | |
1992 | read_enumeration (&di, thisdie, nextdie, objfile); | |
1993 | break; | |
1994 | case TAG_subroutine_type: | |
1995 | read_subroutine_type (&di, thisdie, nextdie); | |
1996 | break; | |
1997 | case TAG_array_type: | |
1998 | dwarf_read_array_type (&di); | |
1999 | break; | |
2000 | case TAG_pointer_type: | |
2001 | read_tag_pointer_type (&di); | |
2002 | break; | |
2003 | case TAG_string_type: | |
2004 | read_tag_string_type (&di); | |
2005 | break; | |
2006 | default: | |
2007 | new_symbol (&di, objfile); | |
2008 | break; | |
2009 | } | |
2010 | } | |
2011 | thisdie = nextdie; | |
2012 | } | |
2013 | } | |
2014 | ||
2015 | /* | |
2016 | ||
c5aa993b | 2017 | LOCAL FUNCTION |
c906108c | 2018 | |
c5aa993b | 2019 | decode_line_numbers -- decode a line number table fragment |
c906108c | 2020 | |
c5aa993b | 2021 | SYNOPSIS |
c906108c | 2022 | |
c5aa993b JM |
2023 | static void decode_line_numbers (char *tblscan, char *tblend, |
2024 | long length, long base, long line, long pc) | |
c906108c | 2025 | |
c5aa993b | 2026 | DESCRIPTION |
c906108c | 2027 | |
c5aa993b | 2028 | Translate the DWARF line number information to gdb form. |
c906108c | 2029 | |
c5aa993b JM |
2030 | The ".line" section contains one or more line number tables, one for |
2031 | each ".line" section from the objects that were linked. | |
c906108c | 2032 | |
c5aa993b JM |
2033 | The AT_stmt_list attribute for each TAG_source_file entry in the |
2034 | ".debug" section contains the offset into the ".line" section for the | |
2035 | start of the table for that file. | |
c906108c | 2036 | |
c5aa993b | 2037 | The table itself has the following structure: |
c906108c | 2038 | |
c5aa993b JM |
2039 | <table length><base address><source statement entry> |
2040 | 4 bytes 4 bytes 10 bytes | |
c906108c | 2041 | |
c5aa993b JM |
2042 | The table length is the total size of the table, including the 4 bytes |
2043 | for the length information. | |
c906108c | 2044 | |
c5aa993b JM |
2045 | The base address is the address of the first instruction generated |
2046 | for the source file. | |
c906108c | 2047 | |
c5aa993b | 2048 | Each source statement entry has the following structure: |
c906108c | 2049 | |
c5aa993b JM |
2050 | <line number><statement position><address delta> |
2051 | 4 bytes 2 bytes 4 bytes | |
c906108c | 2052 | |
c5aa993b JM |
2053 | The line number is relative to the start of the file, starting with |
2054 | line 1. | |
c906108c | 2055 | |
c5aa993b JM |
2056 | The statement position either -1 (0xFFFF) or the number of characters |
2057 | from the beginning of the line to the beginning of the statement. | |
c906108c | 2058 | |
c5aa993b JM |
2059 | The address delta is the difference between the base address and |
2060 | the address of the first instruction for the statement. | |
c906108c | 2061 | |
c5aa993b JM |
2062 | Note that we must copy the bytes from the packed table to our local |
2063 | variables before attempting to use them, to avoid alignment problems | |
2064 | on some machines, particularly RISC processors. | |
c906108c | 2065 | |
c5aa993b | 2066 | BUGS |
c906108c | 2067 | |
c5aa993b JM |
2068 | Does gdb expect the line numbers to be sorted? They are now by |
2069 | chance/luck, but are not required to be. (FIXME) | |
c906108c | 2070 | |
c5aa993b JM |
2071 | The line with number 0 is unused, gdb apparently can discover the |
2072 | span of the last line some other way. How? (FIXME) | |
c906108c SS |
2073 | */ |
2074 | ||
2075 | static void | |
fba45db2 | 2076 | decode_line_numbers (char *linetable) |
c906108c SS |
2077 | { |
2078 | char *tblscan; | |
2079 | char *tblend; | |
2080 | unsigned long length; | |
2081 | unsigned long base; | |
2082 | unsigned long line; | |
2083 | unsigned long pc; | |
c5aa993b | 2084 | |
c906108c SS |
2085 | if (linetable != NULL) |
2086 | { | |
2087 | tblscan = tblend = linetable; | |
2088 | length = target_to_host (tblscan, SIZEOF_LINETBL_LENGTH, GET_UNSIGNED, | |
2089 | current_objfile); | |
2090 | tblscan += SIZEOF_LINETBL_LENGTH; | |
2091 | tblend += length; | |
2092 | base = target_to_host (tblscan, TARGET_FT_POINTER_SIZE (objfile), | |
2093 | GET_UNSIGNED, current_objfile); | |
2094 | tblscan += TARGET_FT_POINTER_SIZE (objfile); | |
2095 | base += baseaddr; | |
2096 | while (tblscan < tblend) | |
2097 | { | |
2098 | line = target_to_host (tblscan, SIZEOF_LINETBL_LINENO, GET_UNSIGNED, | |
2099 | current_objfile); | |
2100 | tblscan += SIZEOF_LINETBL_LINENO + SIZEOF_LINETBL_STMT; | |
2101 | pc = target_to_host (tblscan, SIZEOF_LINETBL_DELTA, GET_UNSIGNED, | |
2102 | current_objfile); | |
2103 | tblscan += SIZEOF_LINETBL_DELTA; | |
2104 | pc += base; | |
2105 | if (line != 0) | |
2106 | { | |
2107 | record_line (current_subfile, line, pc); | |
2108 | } | |
2109 | } | |
2110 | } | |
2111 | } | |
2112 | ||
2113 | /* | |
2114 | ||
c5aa993b | 2115 | LOCAL FUNCTION |
c906108c | 2116 | |
c5aa993b | 2117 | locval -- compute the value of a location attribute |
c906108c | 2118 | |
c5aa993b | 2119 | SYNOPSIS |
c906108c | 2120 | |
c5aa993b | 2121 | static int locval (struct dieinfo *dip) |
c906108c | 2122 | |
c5aa993b | 2123 | DESCRIPTION |
c906108c | 2124 | |
c5aa993b JM |
2125 | Given pointer to a string of bytes that define a location, compute |
2126 | the location and return the value. | |
2127 | A location description containing no atoms indicates that the | |
2128 | object is optimized out. The optimized_out flag is set for those, | |
2129 | the return value is meaningless. | |
c906108c | 2130 | |
c5aa993b JM |
2131 | When computing values involving the current value of the frame pointer, |
2132 | the value zero is used, which results in a value relative to the frame | |
2133 | pointer, rather than the absolute value. This is what GDB wants | |
2134 | anyway. | |
c906108c | 2135 | |
c5aa993b JM |
2136 | When the result is a register number, the isreg flag is set, otherwise |
2137 | it is cleared. This is a kludge until we figure out a better | |
2138 | way to handle the problem. Gdb's design does not mesh well with the | |
2139 | DWARF notion of a location computing interpreter, which is a shame | |
2140 | because the flexibility goes unused. | |
2141 | ||
2142 | NOTES | |
2143 | ||
2144 | Note that stack[0] is unused except as a default error return. | |
2145 | Note that stack overflow is not yet handled. | |
c906108c SS |
2146 | */ |
2147 | ||
2148 | static int | |
fba45db2 | 2149 | locval (struct dieinfo *dip) |
c906108c SS |
2150 | { |
2151 | unsigned short nbytes; | |
2152 | unsigned short locsize; | |
2153 | auto long stack[64]; | |
2154 | int stacki; | |
2155 | char *loc; | |
2156 | char *end; | |
2157 | int loc_atom_code; | |
2158 | int loc_value_size; | |
c5aa993b JM |
2159 | |
2160 | loc = dip->at_location; | |
c906108c SS |
2161 | nbytes = attribute_size (AT_location); |
2162 | locsize = target_to_host (loc, nbytes, GET_UNSIGNED, current_objfile); | |
2163 | loc += nbytes; | |
2164 | end = loc + locsize; | |
2165 | stacki = 0; | |
2166 | stack[stacki] = 0; | |
c5aa993b JM |
2167 | dip->isreg = 0; |
2168 | dip->offreg = 0; | |
2169 | dip->optimized_out = 1; | |
c906108c SS |
2170 | loc_value_size = TARGET_FT_LONG_SIZE (current_objfile); |
2171 | while (loc < end) | |
2172 | { | |
c5aa993b | 2173 | dip->optimized_out = 0; |
c906108c SS |
2174 | loc_atom_code = target_to_host (loc, SIZEOF_LOC_ATOM_CODE, GET_UNSIGNED, |
2175 | current_objfile); | |
2176 | loc += SIZEOF_LOC_ATOM_CODE; | |
2177 | switch (loc_atom_code) | |
2178 | { | |
c5aa993b JM |
2179 | case 0: |
2180 | /* error */ | |
2181 | loc = end; | |
2182 | break; | |
2183 | case OP_REG: | |
2184 | /* push register (number) */ | |
2185 | stack[++stacki] | |
2186 | = DWARF_REG_TO_REGNUM (target_to_host (loc, loc_value_size, | |
2187 | GET_UNSIGNED, | |
2188 | current_objfile)); | |
2189 | loc += loc_value_size; | |
2190 | dip->isreg = 1; | |
2191 | break; | |
2192 | case OP_BASEREG: | |
2193 | /* push value of register (number) */ | |
2194 | /* Actually, we compute the value as if register has 0, so the | |
2195 | value ends up being the offset from that register. */ | |
2196 | dip->offreg = 1; | |
2197 | dip->basereg = target_to_host (loc, loc_value_size, GET_UNSIGNED, | |
2198 | current_objfile); | |
2199 | loc += loc_value_size; | |
2200 | stack[++stacki] = 0; | |
2201 | break; | |
2202 | case OP_ADDR: | |
2203 | /* push address (relocated address) */ | |
2204 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2205 | GET_UNSIGNED, current_objfile); | |
2206 | loc += loc_value_size; | |
2207 | break; | |
2208 | case OP_CONST: | |
2209 | /* push constant (number) FIXME: signed or unsigned! */ | |
2210 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2211 | GET_SIGNED, current_objfile); | |
2212 | loc += loc_value_size; | |
2213 | break; | |
2214 | case OP_DEREF2: | |
2215 | /* pop, deref and push 2 bytes (as a long) */ | |
2216 | complain (&op_deref2, DIE_ID, DIE_NAME, stack[stacki]); | |
2217 | break; | |
2218 | case OP_DEREF4: /* pop, deref and push 4 bytes (as a long) */ | |
2219 | complain (&op_deref4, DIE_ID, DIE_NAME, stack[stacki]); | |
2220 | break; | |
2221 | case OP_ADD: /* pop top 2 items, add, push result */ | |
2222 | stack[stacki - 1] += stack[stacki]; | |
2223 | stacki--; | |
2224 | break; | |
c906108c SS |
2225 | } |
2226 | } | |
2227 | return (stack[stacki]); | |
2228 | } | |
2229 | ||
2230 | /* | |
2231 | ||
c5aa993b | 2232 | LOCAL FUNCTION |
c906108c | 2233 | |
c5aa993b | 2234 | read_ofile_symtab -- build a full symtab entry from chunk of DIE's |
c906108c | 2235 | |
c5aa993b | 2236 | SYNOPSIS |
c906108c | 2237 | |
c5aa993b | 2238 | static void read_ofile_symtab (struct partial_symtab *pst) |
c906108c | 2239 | |
c5aa993b | 2240 | DESCRIPTION |
c906108c | 2241 | |
c5aa993b JM |
2242 | When expanding a partial symbol table entry to a full symbol table |
2243 | entry, this is the function that gets called to read in the symbols | |
2244 | for the compilation unit. A pointer to the newly constructed symtab, | |
2245 | which is now the new first one on the objfile's symtab list, is | |
2246 | stashed in the partial symbol table entry. | |
c906108c SS |
2247 | */ |
2248 | ||
2249 | static void | |
fba45db2 | 2250 | read_ofile_symtab (struct partial_symtab *pst) |
c906108c SS |
2251 | { |
2252 | struct cleanup *back_to; | |
2253 | unsigned long lnsize; | |
2254 | file_ptr foffset; | |
2255 | bfd *abfd; | |
2256 | char lnsizedata[SIZEOF_LINETBL_LENGTH]; | |
2257 | ||
c5aa993b JM |
2258 | abfd = pst->objfile->obfd; |
2259 | current_objfile = pst->objfile; | |
c906108c SS |
2260 | |
2261 | /* Allocate a buffer for the entire chunk of DIE's for this compilation | |
2262 | unit, seek to the location in the file, and read in all the DIE's. */ | |
2263 | ||
2264 | diecount = 0; | |
2265 | dbsize = DBLENGTH (pst); | |
2266 | dbbase = xmalloc (dbsize); | |
c5aa993b JM |
2267 | dbroff = DBROFF (pst); |
2268 | foffset = DBFOFF (pst) + dbroff; | |
c906108c SS |
2269 | base_section_offsets = pst->section_offsets; |
2270 | baseaddr = ANOFFSET (pst->section_offsets, 0); | |
2271 | if (bfd_seek (abfd, foffset, SEEK_SET) || | |
3a42e9d0 | 2272 | (bfd_bread (dbbase, dbsize, abfd) != dbsize)) |
c906108c | 2273 | { |
b8c9b27d | 2274 | xfree (dbbase); |
c906108c SS |
2275 | error ("can't read DWARF data"); |
2276 | } | |
b8c9b27d | 2277 | back_to = make_cleanup (xfree, dbbase); |
c906108c SS |
2278 | |
2279 | /* If there is a line number table associated with this compilation unit | |
2280 | then read the size of this fragment in bytes, from the fragment itself. | |
2281 | Allocate a buffer for the fragment and read it in for future | |
2282 | processing. */ | |
2283 | ||
2284 | lnbase = NULL; | |
2285 | if (LNFOFF (pst)) | |
2286 | { | |
2287 | if (bfd_seek (abfd, LNFOFF (pst), SEEK_SET) || | |
3a42e9d0 AM |
2288 | (bfd_bread ((PTR) lnsizedata, sizeof (lnsizedata), abfd) |
2289 | != sizeof (lnsizedata))) | |
c906108c SS |
2290 | { |
2291 | error ("can't read DWARF line number table size"); | |
2292 | } | |
2293 | lnsize = target_to_host (lnsizedata, SIZEOF_LINETBL_LENGTH, | |
c5aa993b | 2294 | GET_UNSIGNED, pst->objfile); |
c906108c SS |
2295 | lnbase = xmalloc (lnsize); |
2296 | if (bfd_seek (abfd, LNFOFF (pst), SEEK_SET) || | |
3a42e9d0 | 2297 | (bfd_bread (lnbase, lnsize, abfd) != lnsize)) |
c906108c | 2298 | { |
b8c9b27d | 2299 | xfree (lnbase); |
c906108c SS |
2300 | error ("can't read DWARF line numbers"); |
2301 | } | |
b8c9b27d | 2302 | make_cleanup (xfree, lnbase); |
c906108c SS |
2303 | } |
2304 | ||
c5aa993b | 2305 | process_dies (dbbase, dbbase + dbsize, pst->objfile); |
c906108c SS |
2306 | do_cleanups (back_to); |
2307 | current_objfile = NULL; | |
c5aa993b | 2308 | pst->symtab = pst->objfile->symtabs; |
c906108c SS |
2309 | } |
2310 | ||
2311 | /* | |
2312 | ||
c5aa993b | 2313 | LOCAL FUNCTION |
c906108c | 2314 | |
c5aa993b | 2315 | psymtab_to_symtab_1 -- do grunt work for building a full symtab entry |
c906108c | 2316 | |
c5aa993b | 2317 | SYNOPSIS |
c906108c | 2318 | |
c5aa993b | 2319 | static void psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 2320 | |
c5aa993b | 2321 | DESCRIPTION |
c906108c | 2322 | |
c5aa993b JM |
2323 | Called once for each partial symbol table entry that needs to be |
2324 | expanded into a full symbol table entry. | |
c906108c | 2325 | |
c5aa993b | 2326 | */ |
c906108c SS |
2327 | |
2328 | static void | |
fba45db2 | 2329 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c SS |
2330 | { |
2331 | int i; | |
2332 | struct cleanup *old_chain; | |
c5aa993b | 2333 | |
c906108c SS |
2334 | if (pst != NULL) |
2335 | { | |
2336 | if (pst->readin) | |
2337 | { | |
2338 | warning ("psymtab for %s already read in. Shouldn't happen.", | |
c5aa993b | 2339 | pst->filename); |
c906108c SS |
2340 | } |
2341 | else | |
2342 | { | |
2343 | /* Read in all partial symtabs on which this one is dependent */ | |
c5aa993b | 2344 | for (i = 0; i < pst->number_of_dependencies; i++) |
c906108c | 2345 | { |
c5aa993b | 2346 | if (!pst->dependencies[i]->readin) |
c906108c SS |
2347 | { |
2348 | /* Inform about additional files that need to be read in. */ | |
2349 | if (info_verbose) | |
2350 | { | |
2351 | fputs_filtered (" ", gdb_stdout); | |
2352 | wrap_here (""); | |
2353 | fputs_filtered ("and ", gdb_stdout); | |
2354 | wrap_here (""); | |
2355 | printf_filtered ("%s...", | |
c5aa993b | 2356 | pst->dependencies[i]->filename); |
c906108c | 2357 | wrap_here (""); |
c5aa993b | 2358 | gdb_flush (gdb_stdout); /* Flush output */ |
c906108c | 2359 | } |
c5aa993b | 2360 | psymtab_to_symtab_1 (pst->dependencies[i]); |
c906108c | 2361 | } |
c5aa993b JM |
2362 | } |
2363 | if (DBLENGTH (pst)) /* Otherwise it's a dummy */ | |
c906108c SS |
2364 | { |
2365 | buildsym_init (); | |
a0b3c4fd | 2366 | old_chain = make_cleanup (really_free_pendings, 0); |
c906108c SS |
2367 | read_ofile_symtab (pst); |
2368 | if (info_verbose) | |
2369 | { | |
2370 | printf_filtered ("%d DIE's, sorting...", diecount); | |
2371 | wrap_here (""); | |
2372 | gdb_flush (gdb_stdout); | |
2373 | } | |
c5aa993b | 2374 | sort_symtab_syms (pst->symtab); |
c906108c SS |
2375 | do_cleanups (old_chain); |
2376 | } | |
c5aa993b | 2377 | pst->readin = 1; |
c906108c SS |
2378 | } |
2379 | } | |
2380 | } | |
2381 | ||
2382 | /* | |
2383 | ||
c5aa993b | 2384 | LOCAL FUNCTION |
c906108c | 2385 | |
c5aa993b | 2386 | dwarf_psymtab_to_symtab -- build a full symtab entry from partial one |
c906108c | 2387 | |
c5aa993b | 2388 | SYNOPSIS |
c906108c | 2389 | |
c5aa993b | 2390 | static void dwarf_psymtab_to_symtab (struct partial_symtab *pst) |
c906108c | 2391 | |
c5aa993b | 2392 | DESCRIPTION |
c906108c | 2393 | |
c5aa993b JM |
2394 | This is the DWARF support entry point for building a full symbol |
2395 | table entry from a partial symbol table entry. We are passed a | |
2396 | pointer to the partial symbol table entry that needs to be expanded. | |
c906108c | 2397 | |
c5aa993b | 2398 | */ |
c906108c SS |
2399 | |
2400 | static void | |
fba45db2 | 2401 | dwarf_psymtab_to_symtab (struct partial_symtab *pst) |
c906108c SS |
2402 | { |
2403 | ||
2404 | if (pst != NULL) | |
2405 | { | |
c5aa993b | 2406 | if (pst->readin) |
c906108c SS |
2407 | { |
2408 | warning ("psymtab for %s already read in. Shouldn't happen.", | |
c5aa993b | 2409 | pst->filename); |
c906108c SS |
2410 | } |
2411 | else | |
2412 | { | |
c5aa993b | 2413 | if (DBLENGTH (pst) || pst->number_of_dependencies) |
c906108c SS |
2414 | { |
2415 | /* Print the message now, before starting serious work, to avoid | |
c5aa993b | 2416 | disconcerting pauses. */ |
c906108c SS |
2417 | if (info_verbose) |
2418 | { | |
2419 | printf_filtered ("Reading in symbols for %s...", | |
c5aa993b | 2420 | pst->filename); |
c906108c SS |
2421 | gdb_flush (gdb_stdout); |
2422 | } | |
c5aa993b | 2423 | |
c906108c | 2424 | psymtab_to_symtab_1 (pst); |
c5aa993b JM |
2425 | |
2426 | #if 0 /* FIXME: Check to see what dbxread is doing here and see if | |
2427 | we need to do an equivalent or is this something peculiar to | |
2428 | stabs/a.out format. | |
2429 | Match with global symbols. This only needs to be done once, | |
2430 | after all of the symtabs and dependencies have been read in. | |
2431 | */ | |
2432 | scan_file_globals (pst->objfile); | |
c906108c | 2433 | #endif |
c5aa993b | 2434 | |
c906108c SS |
2435 | /* Finish up the verbose info message. */ |
2436 | if (info_verbose) | |
2437 | { | |
2438 | printf_filtered ("done.\n"); | |
2439 | gdb_flush (gdb_stdout); | |
2440 | } | |
2441 | } | |
2442 | } | |
2443 | } | |
2444 | } | |
2445 | ||
2446 | /* | |
2447 | ||
c5aa993b | 2448 | LOCAL FUNCTION |
c906108c | 2449 | |
c5aa993b | 2450 | add_enum_psymbol -- add enumeration members to partial symbol table |
c906108c | 2451 | |
c5aa993b | 2452 | DESCRIPTION |
c906108c | 2453 | |
c5aa993b JM |
2454 | Given pointer to a DIE that is known to be for an enumeration, |
2455 | extract the symbolic names of the enumeration members and add | |
2456 | partial symbols for them. | |
2457 | */ | |
c906108c SS |
2458 | |
2459 | static void | |
fba45db2 | 2460 | add_enum_psymbol (struct dieinfo *dip, struct objfile *objfile) |
c906108c SS |
2461 | { |
2462 | char *scan; | |
2463 | char *listend; | |
2464 | unsigned short blocksz; | |
2465 | int nbytes; | |
c5aa993b JM |
2466 | |
2467 | if ((scan = dip->at_element_list) != NULL) | |
c906108c | 2468 | { |
c5aa993b | 2469 | if (dip->short_element_list) |
c906108c SS |
2470 | { |
2471 | nbytes = attribute_size (AT_short_element_list); | |
2472 | } | |
2473 | else | |
2474 | { | |
2475 | nbytes = attribute_size (AT_element_list); | |
2476 | } | |
2477 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); | |
2478 | scan += nbytes; | |
2479 | listend = scan + blocksz; | |
2480 | while (scan < listend) | |
2481 | { | |
2482 | scan += TARGET_FT_LONG_SIZE (objfile); | |
2483 | add_psymbol_to_list (scan, strlen (scan), VAR_NAMESPACE, LOC_CONST, | |
c5aa993b | 2484 | &objfile->static_psymbols, 0, 0, cu_language, |
c906108c SS |
2485 | objfile); |
2486 | scan += strlen (scan) + 1; | |
2487 | } | |
2488 | } | |
2489 | } | |
2490 | ||
2491 | /* | |
2492 | ||
c5aa993b | 2493 | LOCAL FUNCTION |
c906108c | 2494 | |
c5aa993b | 2495 | add_partial_symbol -- add symbol to partial symbol table |
c906108c | 2496 | |
c5aa993b | 2497 | DESCRIPTION |
c906108c | 2498 | |
c5aa993b JM |
2499 | Given a DIE, if it is one of the types that we want to |
2500 | add to a partial symbol table, finish filling in the die info | |
2501 | and then add a partial symbol table entry for it. | |
c906108c | 2502 | |
c5aa993b | 2503 | NOTES |
c906108c | 2504 | |
c5aa993b JM |
2505 | The caller must ensure that the DIE has a valid name attribute. |
2506 | */ | |
c906108c SS |
2507 | |
2508 | static void | |
fba45db2 | 2509 | add_partial_symbol (struct dieinfo *dip, struct objfile *objfile) |
c906108c | 2510 | { |
c5aa993b | 2511 | switch (dip->die_tag) |
c906108c SS |
2512 | { |
2513 | case TAG_global_subroutine: | |
c5aa993b JM |
2514 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
2515 | VAR_NAMESPACE, LOC_BLOCK, | |
2516 | &objfile->global_psymbols, | |
2517 | 0, dip->at_low_pc, cu_language, objfile); | |
c906108c SS |
2518 | break; |
2519 | case TAG_global_variable: | |
c5aa993b | 2520 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
c906108c | 2521 | VAR_NAMESPACE, LOC_STATIC, |
c5aa993b | 2522 | &objfile->global_psymbols, |
c906108c SS |
2523 | 0, 0, cu_language, objfile); |
2524 | break; | |
2525 | case TAG_subroutine: | |
c5aa993b JM |
2526 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
2527 | VAR_NAMESPACE, LOC_BLOCK, | |
2528 | &objfile->static_psymbols, | |
2529 | 0, dip->at_low_pc, cu_language, objfile); | |
c906108c SS |
2530 | break; |
2531 | case TAG_local_variable: | |
c5aa993b | 2532 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
c906108c | 2533 | VAR_NAMESPACE, LOC_STATIC, |
c5aa993b | 2534 | &objfile->static_psymbols, |
c906108c SS |
2535 | 0, 0, cu_language, objfile); |
2536 | break; | |
2537 | case TAG_typedef: | |
c5aa993b | 2538 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
c906108c | 2539 | VAR_NAMESPACE, LOC_TYPEDEF, |
c5aa993b | 2540 | &objfile->static_psymbols, |
c906108c SS |
2541 | 0, 0, cu_language, objfile); |
2542 | break; | |
2543 | case TAG_class_type: | |
2544 | case TAG_structure_type: | |
2545 | case TAG_union_type: | |
2546 | case TAG_enumeration_type: | |
2547 | /* Do not add opaque aggregate definitions to the psymtab. */ | |
c5aa993b | 2548 | if (!dip->has_at_byte_size) |
c906108c | 2549 | break; |
c5aa993b | 2550 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
c906108c | 2551 | STRUCT_NAMESPACE, LOC_TYPEDEF, |
c5aa993b | 2552 | &objfile->static_psymbols, |
c906108c SS |
2553 | 0, 0, cu_language, objfile); |
2554 | if (cu_language == language_cplus) | |
2555 | { | |
2556 | /* For C++, these implicitly act as typedefs as well. */ | |
c5aa993b | 2557 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
c906108c | 2558 | VAR_NAMESPACE, LOC_TYPEDEF, |
c5aa993b | 2559 | &objfile->static_psymbols, |
c906108c SS |
2560 | 0, 0, cu_language, objfile); |
2561 | } | |
2562 | break; | |
2563 | } | |
2564 | } | |
9846de1b | 2565 | /* *INDENT-OFF* */ |
c906108c SS |
2566 | /* |
2567 | ||
2568 | LOCAL FUNCTION | |
2569 | ||
2570 | scan_partial_symbols -- scan DIE's within a single compilation unit | |
2571 | ||
2572 | DESCRIPTION | |
2573 | ||
2574 | Process the DIE's within a single compilation unit, looking for | |
2575 | interesting DIE's that contribute to the partial symbol table entry | |
2576 | for this compilation unit. | |
2577 | ||
2578 | NOTES | |
2579 | ||
2580 | There are some DIE's that may appear both at file scope and within | |
2581 | the scope of a function. We are only interested in the ones at file | |
2582 | scope, and the only way to tell them apart is to keep track of the | |
2583 | scope. For example, consider the test case: | |
2584 | ||
2585 | static int i; | |
2586 | main () { int j; } | |
2587 | ||
2588 | for which the relevant DWARF segment has the structure: | |
2589 | ||
2590 | 0x51: | |
2591 | 0x23 global subrtn sibling 0x9b | |
2592 | name main | |
2593 | fund_type FT_integer | |
2594 | low_pc 0x800004cc | |
2595 | high_pc 0x800004d4 | |
2596 | ||
2597 | 0x74: | |
2598 | 0x23 local var sibling 0x97 | |
2599 | name j | |
2600 | fund_type FT_integer | |
2601 | location OP_BASEREG 0xe | |
2602 | OP_CONST 0xfffffffc | |
2603 | OP_ADD | |
2604 | 0x97: | |
2605 | 0x4 | |
2606 | ||
2607 | 0x9b: | |
2608 | 0x1d local var sibling 0xb8 | |
2609 | name i | |
2610 | fund_type FT_integer | |
2611 | location OP_ADDR 0x800025dc | |
2612 | ||
2613 | 0xb8: | |
2614 | 0x4 | |
2615 | ||
2616 | We want to include the symbol 'i' in the partial symbol table, but | |
2617 | not the symbol 'j'. In essence, we want to skip all the dies within | |
2618 | the scope of a TAG_global_subroutine DIE. | |
2619 | ||
2620 | Don't attempt to add anonymous structures or unions since they have | |
2621 | no name. Anonymous enumerations however are processed, because we | |
2622 | want to extract their member names (the check for a tag name is | |
2623 | done later). | |
2624 | ||
2625 | Also, for variables and subroutines, check that this is the place | |
2626 | where the actual definition occurs, rather than just a reference | |
2627 | to an external. | |
2628 | */ | |
9846de1b | 2629 | /* *INDENT-ON* */ |
c906108c | 2630 | |
c5aa993b JM |
2631 | |
2632 | ||
c906108c | 2633 | static void |
fba45db2 | 2634 | scan_partial_symbols (char *thisdie, char *enddie, struct objfile *objfile) |
c906108c SS |
2635 | { |
2636 | char *nextdie; | |
2637 | char *temp; | |
2638 | struct dieinfo di; | |
c5aa993b | 2639 | |
c906108c SS |
2640 | while (thisdie < enddie) |
2641 | { | |
2642 | basicdieinfo (&di, thisdie, objfile); | |
2643 | if (di.die_length < SIZEOF_DIE_LENGTH) | |
2644 | { | |
2645 | break; | |
2646 | } | |
2647 | else | |
2648 | { | |
2649 | nextdie = thisdie + di.die_length; | |
2650 | /* To avoid getting complete die information for every die, we | |
2651 | only do it (below) for the cases we are interested in. */ | |
2652 | switch (di.die_tag) | |
2653 | { | |
2654 | case TAG_global_subroutine: | |
2655 | case TAG_subroutine: | |
2656 | completedieinfo (&di, objfile); | |
2657 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2658 | { | |
2659 | add_partial_symbol (&di, objfile); | |
2660 | /* If there is a sibling attribute, adjust the nextdie | |
2661 | pointer to skip the entire scope of the subroutine. | |
2662 | Apply some sanity checking to make sure we don't | |
2663 | overrun or underrun the range of remaining DIE's */ | |
2664 | if (di.at_sibling != 0) | |
2665 | { | |
2666 | temp = dbbase + di.at_sibling - dbroff; | |
2667 | if ((temp < thisdie) || (temp >= enddie)) | |
2668 | { | |
2669 | complain (&bad_die_ref, DIE_ID, DIE_NAME, | |
2670 | di.at_sibling); | |
2671 | } | |
2672 | else | |
2673 | { | |
2674 | nextdie = temp; | |
2675 | } | |
2676 | } | |
2677 | } | |
2678 | break; | |
2679 | case TAG_global_variable: | |
2680 | case TAG_local_variable: | |
2681 | completedieinfo (&di, objfile); | |
2682 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2683 | { | |
2684 | add_partial_symbol (&di, objfile); | |
2685 | } | |
2686 | break; | |
2687 | case TAG_typedef: | |
2688 | case TAG_class_type: | |
2689 | case TAG_structure_type: | |
2690 | case TAG_union_type: | |
2691 | completedieinfo (&di, objfile); | |
2692 | if (di.at_name) | |
2693 | { | |
2694 | add_partial_symbol (&di, objfile); | |
2695 | } | |
2696 | break; | |
2697 | case TAG_enumeration_type: | |
2698 | completedieinfo (&di, objfile); | |
2699 | if (di.at_name) | |
2700 | { | |
2701 | add_partial_symbol (&di, objfile); | |
2702 | } | |
2703 | add_enum_psymbol (&di, objfile); | |
2704 | break; | |
2705 | } | |
2706 | } | |
2707 | thisdie = nextdie; | |
2708 | } | |
2709 | } | |
2710 | ||
2711 | /* | |
2712 | ||
c5aa993b | 2713 | LOCAL FUNCTION |
c906108c | 2714 | |
c5aa993b | 2715 | scan_compilation_units -- build a psymtab entry for each compilation |
c906108c | 2716 | |
c5aa993b | 2717 | DESCRIPTION |
c906108c | 2718 | |
c5aa993b JM |
2719 | This is the top level dwarf parsing routine for building partial |
2720 | symbol tables. | |
c906108c | 2721 | |
c5aa993b JM |
2722 | It scans from the beginning of the DWARF table looking for the first |
2723 | TAG_compile_unit DIE, and then follows the sibling chain to locate | |
2724 | each additional TAG_compile_unit DIE. | |
2725 | ||
2726 | For each TAG_compile_unit DIE it creates a partial symtab structure, | |
2727 | calls a subordinate routine to collect all the compilation unit's | |
2728 | global DIE's, file scope DIEs, typedef DIEs, etc, and then links the | |
2729 | new partial symtab structure into the partial symbol table. It also | |
2730 | records the appropriate information in the partial symbol table entry | |
2731 | to allow the chunk of DIE's and line number table for this compilation | |
2732 | unit to be located and re-read later, to generate a complete symbol | |
2733 | table entry for the compilation unit. | |
2734 | ||
2735 | Thus it effectively partitions up a chunk of DIE's for multiple | |
2736 | compilation units into smaller DIE chunks and line number tables, | |
2737 | and associates them with a partial symbol table entry. | |
2738 | ||
2739 | NOTES | |
c906108c | 2740 | |
c5aa993b JM |
2741 | If any compilation unit has no line number table associated with |
2742 | it for some reason (a missing at_stmt_list attribute, rather than | |
2743 | just one with a value of zero, which is valid) then we ensure that | |
2744 | the recorded file offset is zero so that the routine which later | |
2745 | reads line number table fragments knows that there is no fragment | |
2746 | to read. | |
c906108c | 2747 | |
c5aa993b | 2748 | RETURNS |
c906108c | 2749 | |
c5aa993b | 2750 | Returns no value. |
c906108c SS |
2751 | |
2752 | */ | |
2753 | ||
2754 | static void | |
fba45db2 KB |
2755 | scan_compilation_units (char *thisdie, char *enddie, file_ptr dbfoff, |
2756 | file_ptr lnoffset, struct objfile *objfile) | |
c906108c SS |
2757 | { |
2758 | char *nextdie; | |
2759 | struct dieinfo di; | |
2760 | struct partial_symtab *pst; | |
2761 | int culength; | |
2762 | int curoff; | |
2763 | file_ptr curlnoffset; | |
2764 | ||
2765 | while (thisdie < enddie) | |
2766 | { | |
2767 | basicdieinfo (&di, thisdie, objfile); | |
2768 | if (di.die_length < SIZEOF_DIE_LENGTH) | |
2769 | { | |
2770 | break; | |
2771 | } | |
2772 | else if (di.die_tag != TAG_compile_unit) | |
2773 | { | |
2774 | nextdie = thisdie + di.die_length; | |
2775 | } | |
2776 | else | |
2777 | { | |
2778 | completedieinfo (&di, objfile); | |
2779 | set_cu_language (&di); | |
2780 | if (di.at_sibling != 0) | |
2781 | { | |
2782 | nextdie = dbbase + di.at_sibling - dbroff; | |
2783 | } | |
2784 | else | |
2785 | { | |
2786 | nextdie = thisdie + di.die_length; | |
2787 | } | |
2788 | curoff = thisdie - dbbase; | |
2789 | culength = nextdie - thisdie; | |
2790 | curlnoffset = di.has_at_stmt_list ? lnoffset + di.at_stmt_list : 0; | |
2791 | ||
2792 | /* First allocate a new partial symbol table structure */ | |
2793 | ||
2794 | pst = start_psymtab_common (objfile, base_section_offsets, | |
2795 | di.at_name, di.at_low_pc, | |
c5aa993b JM |
2796 | objfile->global_psymbols.next, |
2797 | objfile->static_psymbols.next); | |
c906108c | 2798 | |
c5aa993b JM |
2799 | pst->texthigh = di.at_high_pc; |
2800 | pst->read_symtab_private = (char *) | |
2801 | obstack_alloc (&objfile->psymbol_obstack, | |
2802 | sizeof (struct dwfinfo)); | |
c906108c SS |
2803 | DBFOFF (pst) = dbfoff; |
2804 | DBROFF (pst) = curoff; | |
2805 | DBLENGTH (pst) = culength; | |
c5aa993b JM |
2806 | LNFOFF (pst) = curlnoffset; |
2807 | pst->read_symtab = dwarf_psymtab_to_symtab; | |
c906108c SS |
2808 | |
2809 | /* Now look for partial symbols */ | |
2810 | ||
2811 | scan_partial_symbols (thisdie + di.die_length, nextdie, objfile); | |
2812 | ||
c5aa993b JM |
2813 | pst->n_global_syms = objfile->global_psymbols.next - |
2814 | (objfile->global_psymbols.list + pst->globals_offset); | |
2815 | pst->n_static_syms = objfile->static_psymbols.next - | |
2816 | (objfile->static_psymbols.list + pst->statics_offset); | |
c906108c SS |
2817 | sort_pst_symbols (pst); |
2818 | /* If there is already a psymtab or symtab for a file of this name, | |
2819 | remove it. (If there is a symtab, more drastic things also | |
2820 | happen.) This happens in VxWorks. */ | |
c5aa993b | 2821 | free_named_symtabs (pst->filename); |
c906108c | 2822 | } |
c5aa993b | 2823 | thisdie = nextdie; |
c906108c SS |
2824 | } |
2825 | } | |
2826 | ||
2827 | /* | |
2828 | ||
c5aa993b | 2829 | LOCAL FUNCTION |
c906108c | 2830 | |
c5aa993b | 2831 | new_symbol -- make a symbol table entry for a new symbol |
c906108c | 2832 | |
c5aa993b | 2833 | SYNOPSIS |
c906108c | 2834 | |
c5aa993b JM |
2835 | static struct symbol *new_symbol (struct dieinfo *dip, |
2836 | struct objfile *objfile) | |
c906108c | 2837 | |
c5aa993b | 2838 | DESCRIPTION |
c906108c | 2839 | |
c5aa993b JM |
2840 | Given a pointer to a DWARF information entry, figure out if we need |
2841 | to make a symbol table entry for it, and if so, create a new entry | |
2842 | and return a pointer to it. | |
c906108c SS |
2843 | */ |
2844 | ||
2845 | static struct symbol * | |
fba45db2 | 2846 | new_symbol (struct dieinfo *dip, struct objfile *objfile) |
c906108c SS |
2847 | { |
2848 | struct symbol *sym = NULL; | |
c5aa993b JM |
2849 | |
2850 | if (dip->at_name != NULL) | |
c906108c | 2851 | { |
c5aa993b | 2852 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
c906108c SS |
2853 | sizeof (struct symbol)); |
2854 | OBJSTAT (objfile, n_syms++); | |
2855 | memset (sym, 0, sizeof (struct symbol)); | |
c5aa993b | 2856 | SYMBOL_NAME (sym) = create_name (dip->at_name, |
c906108c SS |
2857 | &objfile->symbol_obstack); |
2858 | /* default assumptions */ | |
2859 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2860 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2861 | SYMBOL_TYPE (sym) = decode_die_type (dip); | |
2862 | ||
2863 | /* If this symbol is from a C++ compilation, then attempt to cache the | |
c5aa993b JM |
2864 | demangled form for future reference. This is a typical time versus |
2865 | space tradeoff, that was decided in favor of time because it sped up | |
2866 | C++ symbol lookups by a factor of about 20. */ | |
c906108c SS |
2867 | |
2868 | SYMBOL_LANGUAGE (sym) = cu_language; | |
c5aa993b JM |
2869 | SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack); |
2870 | switch (dip->die_tag) | |
c906108c SS |
2871 | { |
2872 | case TAG_label: | |
c5aa993b | 2873 | SYMBOL_VALUE_ADDRESS (sym) = dip->at_low_pc; |
c906108c SS |
2874 | SYMBOL_CLASS (sym) = LOC_LABEL; |
2875 | break; | |
2876 | case TAG_global_subroutine: | |
2877 | case TAG_subroutine: | |
c5aa993b | 2878 | SYMBOL_VALUE_ADDRESS (sym) = dip->at_low_pc; |
c906108c | 2879 | SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym)); |
c5aa993b | 2880 | if (dip->at_prototyped) |
c906108c SS |
2881 | TYPE_FLAGS (SYMBOL_TYPE (sym)) |= TYPE_FLAG_PROTOTYPED; |
2882 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
c5aa993b | 2883 | if (dip->die_tag == TAG_global_subroutine) |
c906108c SS |
2884 | { |
2885 | add_symbol_to_list (sym, &global_symbols); | |
2886 | } | |
2887 | else | |
2888 | { | |
2889 | add_symbol_to_list (sym, list_in_scope); | |
2890 | } | |
2891 | break; | |
2892 | case TAG_global_variable: | |
c5aa993b | 2893 | if (dip->at_location != NULL) |
c906108c SS |
2894 | { |
2895 | SYMBOL_VALUE_ADDRESS (sym) = locval (dip); | |
2896 | add_symbol_to_list (sym, &global_symbols); | |
2897 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2898 | SYMBOL_VALUE (sym) += baseaddr; | |
2899 | } | |
2900 | break; | |
2901 | case TAG_local_variable: | |
c5aa993b | 2902 | if (dip->at_location != NULL) |
c906108c SS |
2903 | { |
2904 | int loc = locval (dip); | |
c5aa993b | 2905 | if (dip->optimized_out) |
c906108c SS |
2906 | { |
2907 | SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; | |
2908 | } | |
c5aa993b | 2909 | else if (dip->isreg) |
c906108c SS |
2910 | { |
2911 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
2912 | } | |
c5aa993b | 2913 | else if (dip->offreg) |
c906108c SS |
2914 | { |
2915 | SYMBOL_CLASS (sym) = LOC_BASEREG; | |
c5aa993b | 2916 | SYMBOL_BASEREG (sym) = dip->basereg; |
c906108c SS |
2917 | } |
2918 | else | |
2919 | { | |
2920 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2921 | SYMBOL_VALUE (sym) += baseaddr; | |
2922 | } | |
2923 | if (SYMBOL_CLASS (sym) == LOC_STATIC) | |
2924 | { | |
2925 | /* LOC_STATIC address class MUST use SYMBOL_VALUE_ADDRESS, | |
2926 | which may store to a bigger location than SYMBOL_VALUE. */ | |
2927 | SYMBOL_VALUE_ADDRESS (sym) = loc; | |
2928 | } | |
2929 | else | |
2930 | { | |
2931 | SYMBOL_VALUE (sym) = loc; | |
2932 | } | |
2933 | add_symbol_to_list (sym, list_in_scope); | |
2934 | } | |
2935 | break; | |
2936 | case TAG_formal_parameter: | |
c5aa993b | 2937 | if (dip->at_location != NULL) |
c906108c SS |
2938 | { |
2939 | SYMBOL_VALUE (sym) = locval (dip); | |
2940 | } | |
2941 | add_symbol_to_list (sym, list_in_scope); | |
c5aa993b | 2942 | if (dip->isreg) |
c906108c SS |
2943 | { |
2944 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
2945 | } | |
c5aa993b | 2946 | else if (dip->offreg) |
c906108c SS |
2947 | { |
2948 | SYMBOL_CLASS (sym) = LOC_BASEREG_ARG; | |
c5aa993b | 2949 | SYMBOL_BASEREG (sym) = dip->basereg; |
c906108c SS |
2950 | } |
2951 | else | |
2952 | { | |
2953 | SYMBOL_CLASS (sym) = LOC_ARG; | |
2954 | } | |
2955 | break; | |
2956 | case TAG_unspecified_parameters: | |
2957 | /* From varargs functions; gdb doesn't seem to have any interest in | |
2958 | this information, so just ignore it for now. (FIXME?) */ | |
2959 | break; | |
2960 | case TAG_class_type: | |
2961 | case TAG_structure_type: | |
2962 | case TAG_union_type: | |
2963 | case TAG_enumeration_type: | |
2964 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
2965 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
2966 | add_symbol_to_list (sym, list_in_scope); | |
2967 | break; | |
2968 | case TAG_typedef: | |
2969 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
2970 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2971 | add_symbol_to_list (sym, list_in_scope); | |
2972 | break; | |
2973 | default: | |
2974 | /* Not a tag we recognize. Hopefully we aren't processing trash | |
2975 | data, but since we must specifically ignore things we don't | |
2976 | recognize, there is nothing else we should do at this point. */ | |
2977 | break; | |
2978 | } | |
2979 | } | |
2980 | return (sym); | |
2981 | } | |
2982 | ||
2983 | /* | |
2984 | ||
c5aa993b | 2985 | LOCAL FUNCTION |
c906108c | 2986 | |
c5aa993b | 2987 | synthesize_typedef -- make a symbol table entry for a "fake" typedef |
c906108c | 2988 | |
c5aa993b | 2989 | SYNOPSIS |
c906108c | 2990 | |
c5aa993b JM |
2991 | static void synthesize_typedef (struct dieinfo *dip, |
2992 | struct objfile *objfile, | |
2993 | struct type *type); | |
c906108c | 2994 | |
c5aa993b | 2995 | DESCRIPTION |
c906108c | 2996 | |
c5aa993b JM |
2997 | Given a pointer to a DWARF information entry, synthesize a typedef |
2998 | for the name in the DIE, using the specified type. | |
c906108c | 2999 | |
c5aa993b JM |
3000 | This is used for C++ class, structs, unions, and enumerations to |
3001 | set up the tag name as a type. | |
c906108c SS |
3002 | |
3003 | */ | |
3004 | ||
3005 | static void | |
fba45db2 KB |
3006 | synthesize_typedef (struct dieinfo *dip, struct objfile *objfile, |
3007 | struct type *type) | |
c906108c SS |
3008 | { |
3009 | struct symbol *sym = NULL; | |
c5aa993b JM |
3010 | |
3011 | if (dip->at_name != NULL) | |
c906108c SS |
3012 | { |
3013 | sym = (struct symbol *) | |
c5aa993b | 3014 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); |
c906108c SS |
3015 | OBJSTAT (objfile, n_syms++); |
3016 | memset (sym, 0, sizeof (struct symbol)); | |
c5aa993b | 3017 | SYMBOL_NAME (sym) = create_name (dip->at_name, |
c906108c SS |
3018 | &objfile->symbol_obstack); |
3019 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); | |
3020 | SYMBOL_TYPE (sym) = type; | |
3021 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3022 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
3023 | add_symbol_to_list (sym, list_in_scope); | |
3024 | } | |
3025 | } | |
3026 | ||
3027 | /* | |
3028 | ||
c5aa993b | 3029 | LOCAL FUNCTION |
c906108c | 3030 | |
c5aa993b | 3031 | decode_mod_fund_type -- decode a modified fundamental type |
c906108c | 3032 | |
c5aa993b | 3033 | SYNOPSIS |
c906108c | 3034 | |
c5aa993b | 3035 | static struct type *decode_mod_fund_type (char *typedata) |
c906108c | 3036 | |
c5aa993b | 3037 | DESCRIPTION |
c906108c | 3038 | |
c5aa993b JM |
3039 | Decode a block of data containing a modified fundamental |
3040 | type specification. TYPEDATA is a pointer to the block, | |
3041 | which starts with a length containing the size of the rest | |
3042 | of the block. At the end of the block is a fundmental type | |
3043 | code value that gives the fundamental type. Everything | |
3044 | in between are type modifiers. | |
c906108c | 3045 | |
c5aa993b JM |
3046 | We simply compute the number of modifiers and call the general |
3047 | function decode_modified_type to do the actual work. | |
3048 | */ | |
c906108c SS |
3049 | |
3050 | static struct type * | |
fba45db2 | 3051 | decode_mod_fund_type (char *typedata) |
c906108c SS |
3052 | { |
3053 | struct type *typep = NULL; | |
3054 | unsigned short modcount; | |
3055 | int nbytes; | |
c5aa993b | 3056 | |
c906108c SS |
3057 | /* Get the total size of the block, exclusive of the size itself */ |
3058 | ||
3059 | nbytes = attribute_size (AT_mod_fund_type); | |
3060 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3061 | typedata += nbytes; | |
3062 | ||
3063 | /* Deduct the size of the fundamental type bytes at the end of the block. */ | |
3064 | ||
3065 | modcount -= attribute_size (AT_fund_type); | |
3066 | ||
3067 | /* Now do the actual decoding */ | |
3068 | ||
3069 | typep = decode_modified_type (typedata, modcount, AT_mod_fund_type); | |
3070 | return (typep); | |
3071 | } | |
3072 | ||
3073 | /* | |
3074 | ||
c5aa993b | 3075 | LOCAL FUNCTION |
c906108c | 3076 | |
c5aa993b | 3077 | decode_mod_u_d_type -- decode a modified user defined type |
c906108c | 3078 | |
c5aa993b | 3079 | SYNOPSIS |
c906108c | 3080 | |
c5aa993b | 3081 | static struct type *decode_mod_u_d_type (char *typedata) |
c906108c | 3082 | |
c5aa993b | 3083 | DESCRIPTION |
c906108c | 3084 | |
c5aa993b JM |
3085 | Decode a block of data containing a modified user defined |
3086 | type specification. TYPEDATA is a pointer to the block, | |
3087 | which consists of a two byte length, containing the size | |
3088 | of the rest of the block. At the end of the block is a | |
3089 | four byte value that gives a reference to a user defined type. | |
3090 | Everything in between are type modifiers. | |
c906108c | 3091 | |
c5aa993b JM |
3092 | We simply compute the number of modifiers and call the general |
3093 | function decode_modified_type to do the actual work. | |
3094 | */ | |
c906108c SS |
3095 | |
3096 | static struct type * | |
fba45db2 | 3097 | decode_mod_u_d_type (char *typedata) |
c906108c SS |
3098 | { |
3099 | struct type *typep = NULL; | |
3100 | unsigned short modcount; | |
3101 | int nbytes; | |
c5aa993b | 3102 | |
c906108c SS |
3103 | /* Get the total size of the block, exclusive of the size itself */ |
3104 | ||
3105 | nbytes = attribute_size (AT_mod_u_d_type); | |
3106 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3107 | typedata += nbytes; | |
3108 | ||
3109 | /* Deduct the size of the reference type bytes at the end of the block. */ | |
3110 | ||
3111 | modcount -= attribute_size (AT_user_def_type); | |
3112 | ||
3113 | /* Now do the actual decoding */ | |
3114 | ||
3115 | typep = decode_modified_type (typedata, modcount, AT_mod_u_d_type); | |
3116 | return (typep); | |
3117 | } | |
3118 | ||
3119 | /* | |
3120 | ||
c5aa993b | 3121 | LOCAL FUNCTION |
c906108c | 3122 | |
c5aa993b | 3123 | decode_modified_type -- decode modified user or fundamental type |
c906108c | 3124 | |
c5aa993b | 3125 | SYNOPSIS |
c906108c | 3126 | |
c5aa993b JM |
3127 | static struct type *decode_modified_type (char *modifiers, |
3128 | unsigned short modcount, int mtype) | |
c906108c | 3129 | |
c5aa993b | 3130 | DESCRIPTION |
c906108c | 3131 | |
c5aa993b JM |
3132 | Decode a modified type, either a modified fundamental type or |
3133 | a modified user defined type. MODIFIERS is a pointer to the | |
3134 | block of bytes that define MODCOUNT modifiers. Immediately | |
3135 | following the last modifier is a short containing the fundamental | |
3136 | type or a long containing the reference to the user defined | |
3137 | type. Which one is determined by MTYPE, which is either | |
3138 | AT_mod_fund_type or AT_mod_u_d_type to indicate what modified | |
3139 | type we are generating. | |
c906108c | 3140 | |
c5aa993b JM |
3141 | We call ourself recursively to generate each modified type,` |
3142 | until MODCOUNT reaches zero, at which point we have consumed | |
3143 | all the modifiers and generate either the fundamental type or | |
3144 | user defined type. When the recursion unwinds, each modifier | |
3145 | is applied in turn to generate the full modified type. | |
3146 | ||
3147 | NOTES | |
c906108c | 3148 | |
c5aa993b JM |
3149 | If we find a modifier that we don't recognize, and it is not one |
3150 | of those reserved for application specific use, then we issue a | |
3151 | warning and simply ignore the modifier. | |
c906108c | 3152 | |
c5aa993b | 3153 | BUGS |
c906108c | 3154 | |
c5aa993b | 3155 | We currently ignore MOD_const and MOD_volatile. (FIXME) |
c906108c SS |
3156 | |
3157 | */ | |
3158 | ||
3159 | static struct type * | |
fba45db2 | 3160 | decode_modified_type (char *modifiers, unsigned int modcount, int mtype) |
c906108c SS |
3161 | { |
3162 | struct type *typep = NULL; | |
3163 | unsigned short fundtype; | |
3164 | DIE_REF die_ref; | |
3165 | char modifier; | |
3166 | int nbytes; | |
c5aa993b | 3167 | |
c906108c SS |
3168 | if (modcount == 0) |
3169 | { | |
3170 | switch (mtype) | |
3171 | { | |
3172 | case AT_mod_fund_type: | |
3173 | nbytes = attribute_size (AT_fund_type); | |
3174 | fundtype = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3175 | current_objfile); | |
3176 | typep = decode_fund_type (fundtype); | |
3177 | break; | |
3178 | case AT_mod_u_d_type: | |
3179 | nbytes = attribute_size (AT_user_def_type); | |
3180 | die_ref = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3181 | current_objfile); | |
3182 | if ((typep = lookup_utype (die_ref)) == NULL) | |
3183 | { | |
3184 | typep = alloc_utype (die_ref, NULL); | |
3185 | } | |
3186 | break; | |
3187 | default: | |
3188 | complain (&botched_modified_type, DIE_ID, DIE_NAME, mtype); | |
3189 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
3190 | break; | |
3191 | } | |
3192 | } | |
3193 | else | |
3194 | { | |
3195 | modifier = *modifiers++; | |
3196 | typep = decode_modified_type (modifiers, --modcount, mtype); | |
3197 | switch (modifier) | |
3198 | { | |
c5aa993b JM |
3199 | case MOD_pointer_to: |
3200 | typep = lookup_pointer_type (typep); | |
3201 | break; | |
3202 | case MOD_reference_to: | |
3203 | typep = lookup_reference_type (typep); | |
3204 | break; | |
3205 | case MOD_const: | |
3206 | complain (&const_ignored, DIE_ID, DIE_NAME); /* FIXME */ | |
3207 | break; | |
3208 | case MOD_volatile: | |
3209 | complain (&volatile_ignored, DIE_ID, DIE_NAME); /* FIXME */ | |
3210 | break; | |
3211 | default: | |
3212 | if (!(MOD_lo_user <= (unsigned char) modifier | |
3213 | && (unsigned char) modifier <= MOD_hi_user)) | |
3214 | { | |
3215 | complain (&unknown_type_modifier, DIE_ID, DIE_NAME, modifier); | |
3216 | } | |
3217 | break; | |
c906108c SS |
3218 | } |
3219 | } | |
3220 | return (typep); | |
3221 | } | |
3222 | ||
3223 | /* | |
3224 | ||
c5aa993b | 3225 | LOCAL FUNCTION |
c906108c | 3226 | |
c5aa993b | 3227 | decode_fund_type -- translate basic DWARF type to gdb base type |
c906108c | 3228 | |
c5aa993b | 3229 | DESCRIPTION |
c906108c | 3230 | |
c5aa993b JM |
3231 | Given an integer that is one of the fundamental DWARF types, |
3232 | translate it to one of the basic internal gdb types and return | |
3233 | a pointer to the appropriate gdb type (a "struct type *"). | |
c906108c | 3234 | |
c5aa993b | 3235 | NOTES |
c906108c | 3236 | |
c5aa993b JM |
3237 | For robustness, if we are asked to translate a fundamental |
3238 | type that we are unprepared to deal with, we return int so | |
3239 | callers can always depend upon a valid type being returned, | |
3240 | and so gdb may at least do something reasonable by default. | |
3241 | If the type is not in the range of those types defined as | |
3242 | application specific types, we also issue a warning. | |
3243 | */ | |
c906108c SS |
3244 | |
3245 | static struct type * | |
fba45db2 | 3246 | decode_fund_type (unsigned int fundtype) |
c906108c SS |
3247 | { |
3248 | struct type *typep = NULL; | |
c5aa993b | 3249 | |
c906108c SS |
3250 | switch (fundtype) |
3251 | { | |
3252 | ||
3253 | case FT_void: | |
3254 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); | |
3255 | break; | |
c5aa993b | 3256 | |
c906108c SS |
3257 | case FT_boolean: /* Was FT_set in AT&T version */ |
3258 | typep = dwarf_fundamental_type (current_objfile, FT_BOOLEAN); | |
3259 | break; | |
3260 | ||
3261 | case FT_pointer: /* (void *) */ | |
3262 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); | |
3263 | typep = lookup_pointer_type (typep); | |
3264 | break; | |
c5aa993b | 3265 | |
c906108c SS |
3266 | case FT_char: |
3267 | typep = dwarf_fundamental_type (current_objfile, FT_CHAR); | |
3268 | break; | |
c5aa993b | 3269 | |
c906108c SS |
3270 | case FT_signed_char: |
3271 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_CHAR); | |
3272 | break; | |
3273 | ||
3274 | case FT_unsigned_char: | |
3275 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); | |
3276 | break; | |
c5aa993b | 3277 | |
c906108c SS |
3278 | case FT_short: |
3279 | typep = dwarf_fundamental_type (current_objfile, FT_SHORT); | |
3280 | break; | |
3281 | ||
3282 | case FT_signed_short: | |
3283 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_SHORT); | |
3284 | break; | |
c5aa993b | 3285 | |
c906108c SS |
3286 | case FT_unsigned_short: |
3287 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); | |
3288 | break; | |
c5aa993b | 3289 | |
c906108c SS |
3290 | case FT_integer: |
3291 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
3292 | break; | |
3293 | ||
3294 | case FT_signed_integer: | |
3295 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_INTEGER); | |
3296 | break; | |
c5aa993b | 3297 | |
c906108c SS |
3298 | case FT_unsigned_integer: |
3299 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); | |
3300 | break; | |
c5aa993b | 3301 | |
c906108c SS |
3302 | case FT_long: |
3303 | typep = dwarf_fundamental_type (current_objfile, FT_LONG); | |
3304 | break; | |
3305 | ||
3306 | case FT_signed_long: | |
3307 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG); | |
3308 | break; | |
c5aa993b | 3309 | |
c906108c SS |
3310 | case FT_unsigned_long: |
3311 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG); | |
3312 | break; | |
c5aa993b | 3313 | |
c906108c SS |
3314 | case FT_long_long: |
3315 | typep = dwarf_fundamental_type (current_objfile, FT_LONG_LONG); | |
3316 | break; | |
3317 | ||
3318 | case FT_signed_long_long: | |
3319 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG_LONG); | |
3320 | break; | |
3321 | ||
3322 | case FT_unsigned_long_long: | |
3323 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); | |
3324 | break; | |
3325 | ||
3326 | case FT_float: | |
3327 | typep = dwarf_fundamental_type (current_objfile, FT_FLOAT); | |
3328 | break; | |
c5aa993b | 3329 | |
c906108c SS |
3330 | case FT_dbl_prec_float: |
3331 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); | |
3332 | break; | |
c5aa993b | 3333 | |
c906108c SS |
3334 | case FT_ext_prec_float: |
3335 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); | |
3336 | break; | |
c5aa993b | 3337 | |
c906108c SS |
3338 | case FT_complex: |
3339 | typep = dwarf_fundamental_type (current_objfile, FT_COMPLEX); | |
3340 | break; | |
c5aa993b | 3341 | |
c906108c SS |
3342 | case FT_dbl_prec_complex: |
3343 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_COMPLEX); | |
3344 | break; | |
c5aa993b | 3345 | |
c906108c SS |
3346 | case FT_ext_prec_complex: |
3347 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_COMPLEX); | |
3348 | break; | |
c5aa993b | 3349 | |
c906108c SS |
3350 | } |
3351 | ||
3352 | if (typep == NULL) | |
3353 | { | |
3354 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
3355 | if (!(FT_lo_user <= fundtype && fundtype <= FT_hi_user)) | |
3356 | { | |
3357 | complain (&unexpected_fund_type, DIE_ID, DIE_NAME, fundtype); | |
3358 | } | |
3359 | } | |
c5aa993b | 3360 | |
c906108c SS |
3361 | return (typep); |
3362 | } | |
3363 | ||
3364 | /* | |
3365 | ||
c5aa993b | 3366 | LOCAL FUNCTION |
c906108c | 3367 | |
c5aa993b | 3368 | create_name -- allocate a fresh copy of a string on an obstack |
c906108c | 3369 | |
c5aa993b | 3370 | DESCRIPTION |
c906108c | 3371 | |
c5aa993b JM |
3372 | Given a pointer to a string and a pointer to an obstack, allocates |
3373 | a fresh copy of the string on the specified obstack. | |
c906108c | 3374 | |
c5aa993b | 3375 | */ |
c906108c SS |
3376 | |
3377 | static char * | |
fba45db2 | 3378 | create_name (char *name, struct obstack *obstackp) |
c906108c SS |
3379 | { |
3380 | int length; | |
3381 | char *newname; | |
3382 | ||
3383 | length = strlen (name) + 1; | |
3384 | newname = (char *) obstack_alloc (obstackp, length); | |
3385 | strcpy (newname, name); | |
3386 | return (newname); | |
3387 | } | |
3388 | ||
3389 | /* | |
3390 | ||
c5aa993b | 3391 | LOCAL FUNCTION |
c906108c | 3392 | |
c5aa993b | 3393 | basicdieinfo -- extract the minimal die info from raw die data |
c906108c | 3394 | |
c5aa993b | 3395 | SYNOPSIS |
c906108c | 3396 | |
c5aa993b JM |
3397 | void basicdieinfo (char *diep, struct dieinfo *dip, |
3398 | struct objfile *objfile) | |
c906108c | 3399 | |
c5aa993b | 3400 | DESCRIPTION |
c906108c | 3401 | |
c5aa993b JM |
3402 | Given a pointer to raw DIE data, and a pointer to an instance of a |
3403 | die info structure, this function extracts the basic information | |
3404 | from the DIE data required to continue processing this DIE, along | |
3405 | with some bookkeeping information about the DIE. | |
c906108c | 3406 | |
c5aa993b JM |
3407 | The information we absolutely must have includes the DIE tag, |
3408 | and the DIE length. If we need the sibling reference, then we | |
3409 | will have to call completedieinfo() to process all the remaining | |
3410 | DIE information. | |
c906108c | 3411 | |
c5aa993b JM |
3412 | Note that since there is no guarantee that the data is properly |
3413 | aligned in memory for the type of access required (indirection | |
3414 | through anything other than a char pointer), and there is no | |
3415 | guarantee that it is in the same byte order as the gdb host, | |
3416 | we call a function which deals with both alignment and byte | |
3417 | swapping issues. Possibly inefficient, but quite portable. | |
c906108c | 3418 | |
c5aa993b JM |
3419 | We also take care of some other basic things at this point, such |
3420 | as ensuring that the instance of the die info structure starts | |
3421 | out completely zero'd and that curdie is initialized for use | |
3422 | in error reporting if we have a problem with the current die. | |
c906108c | 3423 | |
c5aa993b JM |
3424 | NOTES |
3425 | ||
3426 | All DIE's must have at least a valid length, thus the minimum | |
3427 | DIE size is SIZEOF_DIE_LENGTH. In order to have a valid tag, the | |
3428 | DIE size must be at least SIZEOF_DIE_TAG larger, otherwise they | |
3429 | are forced to be TAG_padding DIES. | |
c906108c | 3430 | |
c5aa993b JM |
3431 | Padding DIES must be at least SIZEOF_DIE_LENGTH in length, implying |
3432 | that if a padding DIE is used for alignment and the amount needed is | |
3433 | less than SIZEOF_DIE_LENGTH, then the padding DIE has to be big | |
3434 | enough to align to the next alignment boundry. | |
3435 | ||
3436 | We do some basic sanity checking here, such as verifying that the | |
3437 | length of the die would not cause it to overrun the recorded end of | |
3438 | the buffer holding the DIE info. If we find a DIE that is either | |
3439 | too small or too large, we force it's length to zero which should | |
3440 | cause the caller to take appropriate action. | |
c906108c SS |
3441 | */ |
3442 | ||
3443 | static void | |
fba45db2 | 3444 | basicdieinfo (struct dieinfo *dip, char *diep, struct objfile *objfile) |
c906108c SS |
3445 | { |
3446 | curdie = dip; | |
3447 | memset (dip, 0, sizeof (struct dieinfo)); | |
c5aa993b JM |
3448 | dip->die = diep; |
3449 | dip->die_ref = dbroff + (diep - dbbase); | |
3450 | dip->die_length = target_to_host (diep, SIZEOF_DIE_LENGTH, GET_UNSIGNED, | |
3451 | objfile); | |
3452 | if ((dip->die_length < SIZEOF_DIE_LENGTH) || | |
3453 | ((diep + dip->die_length) > (dbbase + dbsize))) | |
c906108c | 3454 | { |
c5aa993b JM |
3455 | complain (&malformed_die, DIE_ID, DIE_NAME, dip->die_length); |
3456 | dip->die_length = 0; | |
c906108c | 3457 | } |
c5aa993b | 3458 | else if (dip->die_length < (SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG)) |
c906108c | 3459 | { |
c5aa993b | 3460 | dip->die_tag = TAG_padding; |
c906108c SS |
3461 | } |
3462 | else | |
3463 | { | |
3464 | diep += SIZEOF_DIE_LENGTH; | |
c5aa993b JM |
3465 | dip->die_tag = target_to_host (diep, SIZEOF_DIE_TAG, GET_UNSIGNED, |
3466 | objfile); | |
c906108c SS |
3467 | } |
3468 | } | |
3469 | ||
3470 | /* | |
3471 | ||
c5aa993b | 3472 | LOCAL FUNCTION |
c906108c | 3473 | |
c5aa993b | 3474 | completedieinfo -- finish reading the information for a given DIE |
c906108c | 3475 | |
c5aa993b | 3476 | SYNOPSIS |
c906108c | 3477 | |
c5aa993b | 3478 | void completedieinfo (struct dieinfo *dip, struct objfile *objfile) |
c906108c | 3479 | |
c5aa993b | 3480 | DESCRIPTION |
c906108c | 3481 | |
c5aa993b JM |
3482 | Given a pointer to an already partially initialized die info structure, |
3483 | scan the raw DIE data and finish filling in the die info structure | |
3484 | from the various attributes found. | |
c906108c | 3485 | |
c5aa993b JM |
3486 | Note that since there is no guarantee that the data is properly |
3487 | aligned in memory for the type of access required (indirection | |
3488 | through anything other than a char pointer), and there is no | |
3489 | guarantee that it is in the same byte order as the gdb host, | |
3490 | we call a function which deals with both alignment and byte | |
3491 | swapping issues. Possibly inefficient, but quite portable. | |
c906108c | 3492 | |
c5aa993b JM |
3493 | NOTES |
3494 | ||
3495 | Each time we are called, we increment the diecount variable, which | |
3496 | keeps an approximate count of the number of dies processed for | |
3497 | each compilation unit. This information is presented to the user | |
3498 | if the info_verbose flag is set. | |
c906108c SS |
3499 | |
3500 | */ | |
3501 | ||
3502 | static void | |
fba45db2 | 3503 | completedieinfo (struct dieinfo *dip, struct objfile *objfile) |
c906108c SS |
3504 | { |
3505 | char *diep; /* Current pointer into raw DIE data */ | |
3506 | char *end; /* Terminate DIE scan here */ | |
3507 | unsigned short attr; /* Current attribute being scanned */ | |
3508 | unsigned short form; /* Form of the attribute */ | |
3509 | int nbytes; /* Size of next field to read */ | |
c5aa993b | 3510 | |
c906108c | 3511 | diecount++; |
c5aa993b JM |
3512 | diep = dip->die; |
3513 | end = diep + dip->die_length; | |
c906108c SS |
3514 | diep += SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG; |
3515 | while (diep < end) | |
3516 | { | |
3517 | attr = target_to_host (diep, SIZEOF_ATTRIBUTE, GET_UNSIGNED, objfile); | |
3518 | diep += SIZEOF_ATTRIBUTE; | |
3519 | if ((nbytes = attribute_size (attr)) == -1) | |
3520 | { | |
3521 | complain (&unknown_attribute_length, DIE_ID, DIE_NAME); | |
3522 | diep = end; | |
3523 | continue; | |
3524 | } | |
3525 | switch (attr) | |
3526 | { | |
3527 | case AT_fund_type: | |
c5aa993b JM |
3528 | dip->at_fund_type = target_to_host (diep, nbytes, GET_UNSIGNED, |
3529 | objfile); | |
c906108c SS |
3530 | break; |
3531 | case AT_ordering: | |
c5aa993b JM |
3532 | dip->at_ordering = target_to_host (diep, nbytes, GET_UNSIGNED, |
3533 | objfile); | |
c906108c SS |
3534 | break; |
3535 | case AT_bit_offset: | |
c5aa993b JM |
3536 | dip->at_bit_offset = target_to_host (diep, nbytes, GET_UNSIGNED, |
3537 | objfile); | |
c906108c SS |
3538 | break; |
3539 | case AT_sibling: | |
c5aa993b JM |
3540 | dip->at_sibling = target_to_host (diep, nbytes, GET_UNSIGNED, |
3541 | objfile); | |
c906108c SS |
3542 | break; |
3543 | case AT_stmt_list: | |
c5aa993b JM |
3544 | dip->at_stmt_list = target_to_host (diep, nbytes, GET_UNSIGNED, |
3545 | objfile); | |
3546 | dip->has_at_stmt_list = 1; | |
c906108c SS |
3547 | break; |
3548 | case AT_low_pc: | |
c5aa993b JM |
3549 | dip->at_low_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3550 | objfile); | |
3551 | dip->at_low_pc += baseaddr; | |
3552 | dip->has_at_low_pc = 1; | |
c906108c SS |
3553 | break; |
3554 | case AT_high_pc: | |
c5aa993b JM |
3555 | dip->at_high_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3556 | objfile); | |
3557 | dip->at_high_pc += baseaddr; | |
c906108c SS |
3558 | break; |
3559 | case AT_language: | |
c5aa993b JM |
3560 | dip->at_language = target_to_host (diep, nbytes, GET_UNSIGNED, |
3561 | objfile); | |
c906108c SS |
3562 | break; |
3563 | case AT_user_def_type: | |
c5aa993b JM |
3564 | dip->at_user_def_type = target_to_host (diep, nbytes, |
3565 | GET_UNSIGNED, objfile); | |
c906108c SS |
3566 | break; |
3567 | case AT_byte_size: | |
c5aa993b JM |
3568 | dip->at_byte_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3569 | objfile); | |
3570 | dip->has_at_byte_size = 1; | |
c906108c SS |
3571 | break; |
3572 | case AT_bit_size: | |
c5aa993b JM |
3573 | dip->at_bit_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3574 | objfile); | |
c906108c SS |
3575 | break; |
3576 | case AT_member: | |
c5aa993b JM |
3577 | dip->at_member = target_to_host (diep, nbytes, GET_UNSIGNED, |
3578 | objfile); | |
c906108c SS |
3579 | break; |
3580 | case AT_discr: | |
c5aa993b JM |
3581 | dip->at_discr = target_to_host (diep, nbytes, GET_UNSIGNED, |
3582 | objfile); | |
c906108c SS |
3583 | break; |
3584 | case AT_location: | |
c5aa993b | 3585 | dip->at_location = diep; |
c906108c SS |
3586 | break; |
3587 | case AT_mod_fund_type: | |
c5aa993b | 3588 | dip->at_mod_fund_type = diep; |
c906108c SS |
3589 | break; |
3590 | case AT_subscr_data: | |
c5aa993b | 3591 | dip->at_subscr_data = diep; |
c906108c SS |
3592 | break; |
3593 | case AT_mod_u_d_type: | |
c5aa993b | 3594 | dip->at_mod_u_d_type = diep; |
c906108c SS |
3595 | break; |
3596 | case AT_element_list: | |
c5aa993b JM |
3597 | dip->at_element_list = diep; |
3598 | dip->short_element_list = 0; | |
c906108c SS |
3599 | break; |
3600 | case AT_short_element_list: | |
c5aa993b JM |
3601 | dip->at_element_list = diep; |
3602 | dip->short_element_list = 1; | |
c906108c SS |
3603 | break; |
3604 | case AT_discr_value: | |
c5aa993b | 3605 | dip->at_discr_value = diep; |
c906108c SS |
3606 | break; |
3607 | case AT_string_length: | |
c5aa993b | 3608 | dip->at_string_length = diep; |
c906108c SS |
3609 | break; |
3610 | case AT_name: | |
c5aa993b | 3611 | dip->at_name = diep; |
c906108c SS |
3612 | break; |
3613 | case AT_comp_dir: | |
3614 | /* For now, ignore any "hostname:" portion, since gdb doesn't | |
3615 | know how to deal with it. (FIXME). */ | |
c5aa993b JM |
3616 | dip->at_comp_dir = strrchr (diep, ':'); |
3617 | if (dip->at_comp_dir != NULL) | |
c906108c | 3618 | { |
c5aa993b | 3619 | dip->at_comp_dir++; |
c906108c SS |
3620 | } |
3621 | else | |
3622 | { | |
c5aa993b | 3623 | dip->at_comp_dir = diep; |
c906108c SS |
3624 | } |
3625 | break; | |
3626 | case AT_producer: | |
c5aa993b | 3627 | dip->at_producer = diep; |
c906108c SS |
3628 | break; |
3629 | case AT_start_scope: | |
c5aa993b JM |
3630 | dip->at_start_scope = target_to_host (diep, nbytes, GET_UNSIGNED, |
3631 | objfile); | |
c906108c SS |
3632 | break; |
3633 | case AT_stride_size: | |
c5aa993b JM |
3634 | dip->at_stride_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3635 | objfile); | |
c906108c SS |
3636 | break; |
3637 | case AT_src_info: | |
c5aa993b JM |
3638 | dip->at_src_info = target_to_host (diep, nbytes, GET_UNSIGNED, |
3639 | objfile); | |
c906108c SS |
3640 | break; |
3641 | case AT_prototyped: | |
c5aa993b | 3642 | dip->at_prototyped = diep; |
c906108c SS |
3643 | break; |
3644 | default: | |
3645 | /* Found an attribute that we are unprepared to handle. However | |
3646 | it is specifically one of the design goals of DWARF that | |
3647 | consumers should ignore unknown attributes. As long as the | |
3648 | form is one that we recognize (so we know how to skip it), | |
3649 | we can just ignore the unknown attribute. */ | |
3650 | break; | |
3651 | } | |
3652 | form = FORM_FROM_ATTR (attr); | |
3653 | switch (form) | |
3654 | { | |
3655 | case FORM_DATA2: | |
3656 | diep += 2; | |
3657 | break; | |
3658 | case FORM_DATA4: | |
3659 | case FORM_REF: | |
3660 | diep += 4; | |
3661 | break; | |
3662 | case FORM_DATA8: | |
3663 | diep += 8; | |
3664 | break; | |
3665 | case FORM_ADDR: | |
3666 | diep += TARGET_FT_POINTER_SIZE (objfile); | |
3667 | break; | |
3668 | case FORM_BLOCK2: | |
3669 | diep += 2 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); | |
3670 | break; | |
3671 | case FORM_BLOCK4: | |
3672 | diep += 4 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); | |
3673 | break; | |
3674 | case FORM_STRING: | |
3675 | diep += strlen (diep) + 1; | |
3676 | break; | |
3677 | default: | |
3678 | complain (&unknown_attribute_form, DIE_ID, DIE_NAME, form); | |
3679 | diep = end; | |
3680 | break; | |
3681 | } | |
3682 | } | |
3683 | } | |
3684 | ||
3685 | /* | |
3686 | ||
c5aa993b | 3687 | LOCAL FUNCTION |
c906108c | 3688 | |
c5aa993b | 3689 | target_to_host -- swap in target data to host |
c906108c | 3690 | |
c5aa993b | 3691 | SYNOPSIS |
c906108c | 3692 | |
c5aa993b JM |
3693 | target_to_host (char *from, int nbytes, int signextend, |
3694 | struct objfile *objfile) | |
c906108c | 3695 | |
c5aa993b | 3696 | DESCRIPTION |
c906108c | 3697 | |
c5aa993b JM |
3698 | Given pointer to data in target format in FROM, a byte count for |
3699 | the size of the data in NBYTES, a flag indicating whether or not | |
3700 | the data is signed in SIGNEXTEND, and a pointer to the current | |
3701 | objfile in OBJFILE, convert the data to host format and return | |
3702 | the converted value. | |
c906108c | 3703 | |
c5aa993b | 3704 | NOTES |
c906108c | 3705 | |
c5aa993b JM |
3706 | FIXME: If we read data that is known to be signed, and expect to |
3707 | use it as signed data, then we need to explicitly sign extend the | |
3708 | result until the bfd library is able to do this for us. | |
c906108c | 3709 | |
c5aa993b | 3710 | FIXME: Would a 32 bit target ever need an 8 byte result? |
c906108c SS |
3711 | |
3712 | */ | |
3713 | ||
3714 | static CORE_ADDR | |
fba45db2 KB |
3715 | target_to_host (char *from, int nbytes, int signextend, /* FIXME: Unused */ |
3716 | struct objfile *objfile) | |
c906108c SS |
3717 | { |
3718 | CORE_ADDR rtnval; | |
3719 | ||
3720 | switch (nbytes) | |
3721 | { | |
c5aa993b JM |
3722 | case 8: |
3723 | rtnval = bfd_get_64 (objfile->obfd, (bfd_byte *) from); | |
3724 | break; | |
3725 | case 4: | |
3726 | rtnval = bfd_get_32 (objfile->obfd, (bfd_byte *) from); | |
3727 | break; | |
3728 | case 2: | |
3729 | rtnval = bfd_get_16 (objfile->obfd, (bfd_byte *) from); | |
3730 | break; | |
3731 | case 1: | |
3732 | rtnval = bfd_get_8 (objfile->obfd, (bfd_byte *) from); | |
3733 | break; | |
3734 | default: | |
3735 | complain (&no_bfd_get_N, DIE_ID, DIE_NAME, nbytes); | |
3736 | rtnval = 0; | |
3737 | break; | |
c906108c SS |
3738 | } |
3739 | return (rtnval); | |
3740 | } | |
3741 | ||
3742 | /* | |
3743 | ||
c5aa993b | 3744 | LOCAL FUNCTION |
c906108c | 3745 | |
c5aa993b | 3746 | attribute_size -- compute size of data for a DWARF attribute |
c906108c | 3747 | |
c5aa993b | 3748 | SYNOPSIS |
c906108c | 3749 | |
c5aa993b | 3750 | static int attribute_size (unsigned int attr) |
c906108c | 3751 | |
c5aa993b | 3752 | DESCRIPTION |
c906108c | 3753 | |
c5aa993b JM |
3754 | Given a DWARF attribute in ATTR, compute the size of the first |
3755 | piece of data associated with this attribute and return that | |
3756 | size. | |
c906108c | 3757 | |
c5aa993b | 3758 | Returns -1 for unrecognized attributes. |
c906108c SS |
3759 | |
3760 | */ | |
3761 | ||
3762 | static int | |
fba45db2 | 3763 | attribute_size (unsigned int attr) |
c906108c SS |
3764 | { |
3765 | int nbytes; /* Size of next data for this attribute */ | |
3766 | unsigned short form; /* Form of the attribute */ | |
3767 | ||
3768 | form = FORM_FROM_ATTR (attr); | |
3769 | switch (form) | |
3770 | { | |
c5aa993b JM |
3771 | case FORM_STRING: /* A variable length field is next */ |
3772 | nbytes = 0; | |
3773 | break; | |
3774 | case FORM_DATA2: /* Next 2 byte field is the data itself */ | |
3775 | case FORM_BLOCK2: /* Next 2 byte field is a block length */ | |
3776 | nbytes = 2; | |
3777 | break; | |
3778 | case FORM_DATA4: /* Next 4 byte field is the data itself */ | |
3779 | case FORM_BLOCK4: /* Next 4 byte field is a block length */ | |
3780 | case FORM_REF: /* Next 4 byte field is a DIE offset */ | |
3781 | nbytes = 4; | |
3782 | break; | |
3783 | case FORM_DATA8: /* Next 8 byte field is the data itself */ | |
3784 | nbytes = 8; | |
3785 | break; | |
3786 | case FORM_ADDR: /* Next field size is target sizeof(void *) */ | |
3787 | nbytes = TARGET_FT_POINTER_SIZE (objfile); | |
3788 | break; | |
3789 | default: | |
3790 | complain (&unknown_attribute_form, DIE_ID, DIE_NAME, form); | |
3791 | nbytes = -1; | |
3792 | break; | |
3793 | } | |
c906108c SS |
3794 | return (nbytes); |
3795 | } |