Commit | Line | Data |
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35f5886e | 1 | /* DWARF debugging format support for GDB. |
1ab3bf1b JG |
2 | Copyright (C) 1991, 1992 Free Software Foundation, Inc. |
3 | Written by Fred Fish at Cygnus Support. Portions based on dbxread.c, | |
35f5886e FF |
4 | mipsread.c, coffread.c, and dwarfread.c from a Data General SVR4 gdb port. |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
21 | ||
22 | /* | |
23 | ||
24 | FIXME: Figure out how to get the frame pointer register number in the | |
25 | execution environment of the target. Remove R_FP kludge | |
26 | ||
27 | FIXME: Add generation of dependencies list to partial symtab code. | |
28 | ||
35f5886e FF |
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. | |
34 | ||
35f5886e FF |
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()) | |
37 | ||
35f5886e FF |
38 | FIXME: See other FIXME's and "ifdef 0" scattered throughout the code for |
39 | other things to work on, if you get bored. :-) | |
40 | ||
41 | */ | |
4d315a07 | 42 | |
d747e0af | 43 | #include "defs.h" |
35f5886e FF |
44 | #include "bfd.h" |
45 | #include "symtab.h" | |
1ab3bf1b | 46 | #include "gdbtypes.h" |
35f5886e | 47 | #include "symfile.h" |
5e2e79f8 | 48 | #include "objfiles.h" |
13b5a7ff | 49 | #include "libbfd.h" /* FIXME Secret Internal BFD stuff (bfd_read) */ |
f5f0679a | 50 | #include "elf/dwarf.h" |
4d315a07 | 51 | #include "buildsym.h" |
2dbde378 | 52 | #include "demangle.h" |
bf229b4e FF |
53 | #include "expression.h" /* Needed for enum exp_opcode in language.h, sigh... */ |
54 | #include "language.h" | |
51b80b00 | 55 | #include "complaints.h" |
35f5886e | 56 | |
d5931d79 JG |
57 | #include <fcntl.h> |
58 | #include <string.h> | |
603900c7 | 59 | #include <sys/types.h> |
51b80b00 | 60 | |
d5931d79 JG |
61 | #ifndef NO_SYS_FILE |
62 | #include <sys/file.h> | |
63 | #endif | |
64 | ||
65 | /* FIXME -- convert this to SEEK_SET a la POSIX, move to config files. */ | |
66 | #ifndef L_SET | |
67 | #define L_SET 0 | |
68 | #endif | |
69 | ||
51b80b00 FF |
70 | /* Some macros to provide DIE info for complaints. */ |
71 | ||
72 | #define DIE_ID (curdie!=NULL ? curdie->die_ref : 0) | |
73 | #define DIE_NAME (curdie!=NULL && curdie->at_name!=NULL) ? curdie->at_name : "" | |
74 | ||
75 | /* Complaints that can be issued during DWARF debug info reading. */ | |
76 | ||
77 | struct complaint no_bfd_get_N = | |
78 | { | |
79 | "DIE @ 0x%x \"%s\", no bfd support for %d byte data object", 0, 0 | |
80 | }; | |
81 | ||
82 | struct complaint malformed_die = | |
83 | { | |
84 | "DIE @ 0x%x \"%s\", malformed DIE, bad length (%d bytes)", 0, 0 | |
85 | }; | |
86 | ||
87 | struct complaint bad_die_ref = | |
88 | { | |
89 | "DIE @ 0x%x \"%s\", reference to DIE (0x%x) outside compilation unit", 0, 0 | |
90 | }; | |
91 | ||
92 | struct complaint unknown_attribute_form = | |
93 | { | |
94 | "DIE @ 0x%x \"%s\", unknown attribute form (0x%x)", 0, 0 | |
95 | }; | |
96 | ||
97 | struct complaint unknown_attribute_length = | |
98 | { | |
99 | "DIE @ 0x%x \"%s\", unknown attribute length, skipped remaining attributes", 0, 0 | |
100 | }; | |
101 | ||
102 | struct complaint unexpected_fund_type = | |
103 | { | |
104 | "DIE @ 0x%x \"%s\", unexpected fundamental type 0x%x", 0, 0 | |
105 | }; | |
106 | ||
107 | struct complaint unknown_type_modifier = | |
108 | { | |
109 | "DIE @ 0x%x \"%s\", unknown type modifier %u", 0, 0 | |
110 | }; | |
111 | ||
112 | struct complaint volatile_ignored = | |
113 | { | |
114 | "DIE @ 0x%x \"%s\", type modifier 'volatile' ignored", 0, 0 | |
115 | }; | |
116 | ||
117 | struct complaint const_ignored = | |
118 | { | |
119 | "DIE @ 0x%x \"%s\", type modifier 'const' ignored", 0, 0 | |
120 | }; | |
121 | ||
122 | struct complaint botched_modified_type = | |
123 | { | |
124 | "DIE @ 0x%x \"%s\", botched modified type decoding (mtype 0x%x)", 0, 0 | |
125 | }; | |
126 | ||
127 | struct complaint op_deref2 = | |
128 | { | |
129 | "DIE @ 0x%x \"%s\", OP_DEREF2 address 0x%x not handled", 0, 0 | |
130 | }; | |
131 | ||
132 | struct complaint op_deref4 = | |
133 | { | |
134 | "DIE @ 0x%x \"%s\", OP_DEREF4 address 0x%x not handled", 0, 0 | |
135 | }; | |
136 | ||
137 | struct complaint basereg_not_handled = | |
138 | { | |
139 | "DIE @ 0x%x \"%s\", BASEREG %d not handled", 0, 0 | |
140 | }; | |
141 | ||
142 | struct complaint dup_user_type_allocation = | |
143 | { | |
144 | "DIE @ 0x%x \"%s\", internal error: duplicate user type allocation", 0, 0 | |
145 | }; | |
146 | ||
147 | struct complaint dup_user_type_definition = | |
148 | { | |
149 | "DIE @ 0x%x \"%s\", internal error: duplicate user type definition", 0, 0 | |
150 | }; | |
151 | ||
152 | struct complaint missing_tag = | |
153 | { | |
154 | "DIE @ 0x%x \"%s\", missing class, structure, or union tag", 0, 0 | |
155 | }; | |
156 | ||
157 | struct complaint bad_array_element_type = | |
158 | { | |
159 | "DIE @ 0x%x \"%s\", bad array element type attribute 0x%x", 0, 0 | |
160 | }; | |
161 | ||
162 | struct complaint subscript_data_items = | |
163 | { | |
164 | "DIE @ 0x%x \"%s\", can't decode subscript data items", 0, 0 | |
165 | }; | |
166 | ||
167 | struct complaint unhandled_array_subscript_format = | |
168 | { | |
169 | "DIE @ 0x%x \"%s\", array subscript format 0x%x not handled yet", 0, 0 | |
170 | }; | |
171 | ||
172 | struct complaint unknown_array_subscript_format = | |
173 | { | |
174 | "DIE @ 0x%x \"%s\", unknown array subscript format %x", 0, 0 | |
175 | }; | |
176 | ||
177 | struct complaint not_row_major = | |
178 | { | |
179 | "DIE @ 0x%x \"%s\", array not row major; not handled correctly", 0, 0 | |
180 | }; | |
35f5886e FF |
181 | |
182 | #ifndef R_FP /* FIXME */ | |
183 | #define R_FP 14 /* Kludge to get frame pointer register number */ | |
184 | #endif | |
185 | ||
13b5a7ff | 186 | typedef unsigned int DIE_REF; /* Reference to a DIE */ |
35f5886e | 187 | |
4d315a07 FF |
188 | #ifndef GCC_PRODUCER |
189 | #define GCC_PRODUCER "GNU C " | |
190 | #endif | |
35f5886e | 191 | |
2dbde378 FF |
192 | #ifndef GPLUS_PRODUCER |
193 | #define GPLUS_PRODUCER "GNU C++ " | |
194 | #endif | |
195 | ||
196 | #ifndef LCC_PRODUCER | |
3dc755fb | 197 | #define LCC_PRODUCER "NCR C/C++" |
2dbde378 FF |
198 | #endif |
199 | ||
93bb6e65 FF |
200 | /* start-sanitize-chill */ |
201 | #ifndef CHILL_PRODUCER | |
202 | #define CHILL_PRODUCER "GNU Chill " | |
203 | #endif | |
204 | /* end-sanitize-chill */ | |
205 | ||
13b5a7ff FF |
206 | /* Flags to target_to_host() that tell whether or not the data object is |
207 | expected to be signed. Used, for example, when fetching a signed | |
208 | integer in the target environment which is used as a signed integer | |
209 | in the host environment, and the two environments have different sized | |
210 | ints. In this case, *somebody* has to sign extend the smaller sized | |
211 | int. */ | |
212 | ||
213 | #define GET_UNSIGNED 0 /* No sign extension required */ | |
214 | #define GET_SIGNED 1 /* Sign extension required */ | |
215 | ||
216 | /* Defines for things which are specified in the document "DWARF Debugging | |
217 | Information Format" published by UNIX International, Programming Languages | |
218 | SIG. These defines are based on revision 1.0.0, Jan 20, 1992. */ | |
219 | ||
220 | #define SIZEOF_DIE_LENGTH 4 | |
221 | #define SIZEOF_DIE_TAG 2 | |
222 | #define SIZEOF_ATTRIBUTE 2 | |
223 | #define SIZEOF_FORMAT_SPECIFIER 1 | |
224 | #define SIZEOF_FMT_FT 2 | |
225 | #define SIZEOF_LINETBL_LENGTH 4 | |
226 | #define SIZEOF_LINETBL_LINENO 4 | |
227 | #define SIZEOF_LINETBL_STMT 2 | |
228 | #define SIZEOF_LINETBL_DELTA 4 | |
229 | #define SIZEOF_LOC_ATOM_CODE 1 | |
230 | ||
231 | #define FORM_FROM_ATTR(attr) ((attr) & 0xF) /* Implicitly specified */ | |
232 | ||
233 | /* Macros that return the sizes of various types of data in the target | |
234 | environment. | |
235 | ||
2d6d969c FF |
236 | FIXME: Currently these are just compile time constants (as they are in |
237 | other parts of gdb as well). They need to be able to get the right size | |
238 | either from the bfd or possibly from the DWARF info. It would be nice if | |
239 | the DWARF producer inserted DIES that describe the fundamental types in | |
240 | the target environment into the DWARF info, similar to the way dbx stabs | |
241 | producers produce information about their fundamental types. */ | |
242 | ||
243 | #define TARGET_FT_POINTER_SIZE(objfile) (TARGET_PTR_BIT / TARGET_CHAR_BIT) | |
244 | #define TARGET_FT_LONG_SIZE(objfile) (TARGET_LONG_BIT / TARGET_CHAR_BIT) | |
95967e73 | 245 | |
768be6e1 FF |
246 | /* The Amiga SVR4 header file <dwarf.h> defines AT_element_list as a |
247 | FORM_BLOCK2, and this is the value emitted by the AT&T compiler. | |
248 | However, the Issue 2 DWARF specification from AT&T defines it as | |
249 | a FORM_BLOCK4, as does the latest specification from UI/PLSIG. | |
250 | For backwards compatibility with the AT&T compiler produced executables | |
251 | we define AT_short_element_list for this variant. */ | |
252 | ||
253 | #define AT_short_element_list (0x00f0|FORM_BLOCK2) | |
254 | ||
255 | /* External variables referenced. */ | |
256 | ||
35f5886e | 257 | extern int info_verbose; /* From main.c; nonzero => verbose */ |
318bf84f | 258 | extern char *warning_pre_print; /* From utils.c */ |
35f5886e FF |
259 | |
260 | /* The DWARF debugging information consists of two major pieces, | |
261 | one is a block of DWARF Information Entries (DIE's) and the other | |
262 | is a line number table. The "struct dieinfo" structure contains | |
263 | the information for a single DIE, the one currently being processed. | |
264 | ||
265 | In order to make it easier to randomly access the attribute fields | |
13b5a7ff | 266 | of the current DIE, which are specifically unordered within the DIE, |
35f5886e FF |
267 | each DIE is scanned and an instance of the "struct dieinfo" |
268 | structure is initialized. | |
269 | ||
270 | Initialization is done in two levels. The first, done by basicdieinfo(), | |
271 | just initializes those fields that are vital to deciding whether or not | |
272 | to use this DIE, how to skip past it, etc. The second, done by the | |
273 | function completedieinfo(), fills in the rest of the information. | |
274 | ||
275 | Attributes which have block forms are not interpreted at the time | |
276 | the DIE is scanned, instead we just save pointers to the start | |
277 | of their value fields. | |
278 | ||
279 | Some fields have a flag <name>_p that is set when the value of the | |
280 | field is valid (I.E. we found a matching attribute in the DIE). Since | |
281 | we may want to test for the presence of some attributes in the DIE, | |
2d6186f4 | 282 | such as AT_low_pc, without restricting the values of the field, |
35f5886e FF |
283 | we need someway to note that we found such an attribute. |
284 | ||
285 | */ | |
286 | ||
287 | typedef char BLOCK; | |
288 | ||
289 | struct dieinfo { | |
13b5a7ff FF |
290 | char * die; /* Pointer to the raw DIE data */ |
291 | unsigned long die_length; /* Length of the raw DIE data */ | |
292 | DIE_REF die_ref; /* Offset of this DIE */ | |
293 | unsigned short die_tag; /* Tag for this DIE */ | |
294 | unsigned long at_padding; | |
295 | unsigned long at_sibling; | |
296 | BLOCK * at_location; | |
297 | char * at_name; | |
298 | unsigned short at_fund_type; | |
299 | BLOCK * at_mod_fund_type; | |
300 | unsigned long at_user_def_type; | |
301 | BLOCK * at_mod_u_d_type; | |
302 | unsigned short at_ordering; | |
303 | BLOCK * at_subscr_data; | |
304 | unsigned long at_byte_size; | |
305 | unsigned short at_bit_offset; | |
306 | unsigned long at_bit_size; | |
307 | BLOCK * at_element_list; | |
308 | unsigned long at_stmt_list; | |
309 | unsigned long at_low_pc; | |
310 | unsigned long at_high_pc; | |
311 | unsigned long at_language; | |
312 | unsigned long at_member; | |
313 | unsigned long at_discr; | |
314 | BLOCK * at_discr_value; | |
13b5a7ff FF |
315 | BLOCK * at_string_length; |
316 | char * at_comp_dir; | |
317 | char * at_producer; | |
13b5a7ff FF |
318 | unsigned long at_start_scope; |
319 | unsigned long at_stride_size; | |
320 | unsigned long at_src_info; | |
321 | char * at_prototyped; | |
322 | unsigned int has_at_low_pc:1; | |
323 | unsigned int has_at_stmt_list:1; | |
50055e94 | 324 | unsigned int has_at_byte_size:1; |
13b5a7ff | 325 | unsigned int short_element_list:1; |
35f5886e FF |
326 | }; |
327 | ||
328 | static int diecount; /* Approximate count of dies for compilation unit */ | |
329 | static struct dieinfo *curdie; /* For warnings and such */ | |
330 | ||
331 | static char *dbbase; /* Base pointer to dwarf info */ | |
4090fe1c | 332 | static int dbsize; /* Size of dwarf info in bytes */ |
35f5886e FF |
333 | static int dbroff; /* Relative offset from start of .debug section */ |
334 | static char *lnbase; /* Base pointer to line section */ | |
335 | static int isreg; /* Kludge to identify register variables */ | |
a5bd5ba6 | 336 | static int offreg; /* Kludge to identify basereg references */ |
35f5886e | 337 | |
2670f34d JG |
338 | /* This value is added to each symbol value. FIXME: Generalize to |
339 | the section_offsets structure used by dbxread. */ | |
35f5886e FF |
340 | static CORE_ADDR baseaddr; /* Add to each symbol value */ |
341 | ||
2670f34d JG |
342 | /* The section offsets used in the current psymtab or symtab. FIXME, |
343 | only used to pass one value (baseaddr) at the moment. */ | |
344 | static struct section_offsets *base_section_offsets; | |
345 | ||
35f5886e FF |
346 | /* Each partial symbol table entry contains a pointer to private data for the |
347 | read_symtab() function to use when expanding a partial symbol table entry | |
348 | to a full symbol table entry. For DWARF debugging info, this data is | |
349 | contained in the following structure and macros are provided for easy | |
350 | access to the members given a pointer to a partial symbol table entry. | |
351 | ||
352 | dbfoff Always the absolute file offset to the start of the ".debug" | |
353 | section for the file containing the DIE's being accessed. | |
354 | ||
355 | dbroff Relative offset from the start of the ".debug" access to the | |
356 | first DIE to be accessed. When building the partial symbol | |
357 | table, this value will be zero since we are accessing the | |
358 | entire ".debug" section. When expanding a partial symbol | |
359 | table entry, this value will be the offset to the first | |
360 | DIE for the compilation unit containing the symbol that | |
361 | triggers the expansion. | |
362 | ||
363 | dblength The size of the chunk of DIE's being examined, in bytes. | |
364 | ||
365 | lnfoff The absolute file offset to the line table fragment. Ignored | |
366 | when building partial symbol tables, but used when expanding | |
367 | them, and contains the absolute file offset to the fragment | |
368 | of the ".line" section containing the line numbers for the | |
369 | current compilation unit. | |
370 | */ | |
371 | ||
372 | struct dwfinfo { | |
d5931d79 | 373 | file_ptr dbfoff; /* Absolute file offset to start of .debug section */ |
35f5886e FF |
374 | int dbroff; /* Relative offset from start of .debug section */ |
375 | int dblength; /* Size of the chunk of DIE's being examined */ | |
d5931d79 | 376 | file_ptr lnfoff; /* Absolute file offset to line table fragment */ |
35f5886e FF |
377 | }; |
378 | ||
379 | #define DBFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbfoff) | |
380 | #define DBROFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbroff) | |
381 | #define DBLENGTH(p) (((struct dwfinfo *)((p)->read_symtab_private))->dblength) | |
382 | #define LNFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->lnfoff) | |
383 | ||
4d315a07 FF |
384 | /* The generic symbol table building routines have separate lists for |
385 | file scope symbols and all all other scopes (local scopes). So | |
386 | we need to select the right one to pass to add_symbol_to_list(). | |
387 | We do it by keeping a pointer to the correct list in list_in_scope. | |
35f5886e | 388 | |
4d315a07 FF |
389 | FIXME: The original dwarf code just treated the file scope as the first |
390 | local scope, and all other local scopes as nested local scopes, and worked | |
391 | fine. Check to see if we really need to distinguish these in buildsym.c */ | |
35f5886e | 392 | |
99140c31 | 393 | struct pending **list_in_scope = &file_symbols; |
35f5886e FF |
394 | |
395 | /* DIES which have user defined types or modified user defined types refer to | |
396 | other DIES for the type information. Thus we need to associate the offset | |
397 | of a DIE for a user defined type with a pointer to the type information. | |
398 | ||
399 | Originally this was done using a simple but expensive algorithm, with an | |
400 | array of unsorted structures, each containing an offset/type-pointer pair. | |
401 | This array was scanned linearly each time a lookup was done. The result | |
402 | was that gdb was spending over half it's startup time munging through this | |
403 | array of pointers looking for a structure that had the right offset member. | |
404 | ||
405 | The second attempt used the same array of structures, but the array was | |
406 | sorted using qsort each time a new offset/type was recorded, and a binary | |
407 | search was used to find the type pointer for a given DIE offset. This was | |
408 | even slower, due to the overhead of sorting the array each time a new | |
409 | offset/type pair was entered. | |
410 | ||
411 | The third attempt uses a fixed size array of type pointers, indexed by a | |
412 | value derived from the DIE offset. Since the minimum DIE size is 4 bytes, | |
413 | we can divide any DIE offset by 4 to obtain a unique index into this fixed | |
414 | size array. Since each element is a 4 byte pointer, it takes exactly as | |
415 | much memory to hold this array as to hold the DWARF info for a given | |
bf229b4e FF |
416 | compilation unit. But it gets freed as soon as we are done with it. |
417 | This has worked well in practice, as a reasonable tradeoff between memory | |
418 | consumption and speed, without having to resort to much more complicated | |
419 | algorithms. */ | |
35f5886e FF |
420 | |
421 | static struct type **utypes; /* Pointer to array of user type pointers */ | |
422 | static int numutypes; /* Max number of user type pointers */ | |
423 | ||
bf229b4e FF |
424 | /* Maintain an array of referenced fundamental types for the current |
425 | compilation unit being read. For DWARF version 1, we have to construct | |
426 | the fundamental types on the fly, since no information about the | |
427 | fundamental types is supplied. Each such fundamental type is created by | |
428 | calling a language dependent routine to create the type, and then a | |
429 | pointer to that type is then placed in the array at the index specified | |
430 | by it's FT_<TYPENAME> value. The array has a fixed size set by the | |
431 | FT_NUM_MEMBERS compile time constant, which is the number of predefined | |
432 | fundamental types gdb knows how to construct. */ | |
433 | ||
434 | static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */ | |
435 | ||
95ff889e FF |
436 | /* Record the language for the compilation unit which is currently being |
437 | processed. We know it once we have seen the TAG_compile_unit DIE, | |
438 | and we need it while processing the DIE's for that compilation unit. | |
439 | It is eventually saved in the symtab structure, but we don't finalize | |
440 | the symtab struct until we have processed all the DIE's for the | |
bf229b4e FF |
441 | compilation unit. We also need to get and save a pointer to the |
442 | language struct for this language, so we can call the language | |
443 | dependent routines for doing things such as creating fundamental | |
444 | types. */ | |
95ff889e FF |
445 | |
446 | static enum language cu_language; | |
bf229b4e | 447 | static const struct language_defn *cu_language_defn; |
95ff889e | 448 | |
35f5886e | 449 | /* Forward declarations of static functions so we don't have to worry |
1ab3bf1b JG |
450 | about ordering within this file. */ |
451 | ||
13b5a7ff FF |
452 | static int |
453 | attribute_size PARAMS ((unsigned int)); | |
454 | ||
455 | static unsigned long | |
456 | target_to_host PARAMS ((char *, int, int, struct objfile *)); | |
95967e73 | 457 | |
1ab3bf1b JG |
458 | static void |
459 | add_enum_psymbol PARAMS ((struct dieinfo *, struct objfile *)); | |
460 | ||
2dbde378 FF |
461 | static void |
462 | handle_producer PARAMS ((char *)); | |
463 | ||
1ab3bf1b JG |
464 | static void |
465 | read_file_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); | |
35f5886e | 466 | |
58050209 | 467 | static void |
1ab3bf1b | 468 | read_func_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
469 | |
470 | static void | |
1ab3bf1b JG |
471 | read_lexical_block_scope PARAMS ((struct dieinfo *, char *, char *, |
472 | struct objfile *)); | |
35f5886e | 473 | |
35f5886e | 474 | static void |
1ab3bf1b | 475 | scan_partial_symbols PARAMS ((char *, char *, struct objfile *)); |
35f5886e | 476 | |
35f5886e | 477 | static void |
d5931d79 JG |
478 | scan_compilation_units PARAMS ((char *, char *, file_ptr, |
479 | file_ptr, struct objfile *)); | |
35f5886e FF |
480 | |
481 | static void | |
1ab3bf1b | 482 | add_partial_symbol PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e FF |
483 | |
484 | static void | |
1ab3bf1b | 485 | init_psymbol_list PARAMS ((struct objfile *, int)); |
35f5886e FF |
486 | |
487 | static void | |
95967e73 | 488 | basicdieinfo PARAMS ((struct dieinfo *, char *, struct objfile *)); |
35f5886e FF |
489 | |
490 | static void | |
95967e73 | 491 | completedieinfo PARAMS ((struct dieinfo *, struct objfile *)); |
1ab3bf1b JG |
492 | |
493 | static void | |
494 | dwarf_psymtab_to_symtab PARAMS ((struct partial_symtab *)); | |
495 | ||
496 | static void | |
497 | psymtab_to_symtab_1 PARAMS ((struct partial_symtab *)); | |
35f5886e FF |
498 | |
499 | static struct symtab * | |
1ab3bf1b | 500 | read_ofile_symtab PARAMS ((struct partial_symtab *)); |
35f5886e FF |
501 | |
502 | static void | |
1ab3bf1b | 503 | process_dies PARAMS ((char *, char *, struct objfile *)); |
35f5886e FF |
504 | |
505 | static void | |
1ab3bf1b JG |
506 | read_structure_scope PARAMS ((struct dieinfo *, char *, char *, |
507 | struct objfile *)); | |
35f5886e FF |
508 | |
509 | static struct type * | |
84ffdec2 | 510 | decode_array_element_type PARAMS ((char *)); |
35f5886e FF |
511 | |
512 | static struct type * | |
85f0a848 | 513 | decode_subscript_data_item PARAMS ((char *, char *)); |
35f5886e FF |
514 | |
515 | static void | |
1ab3bf1b | 516 | dwarf_read_array_type PARAMS ((struct dieinfo *)); |
35f5886e | 517 | |
9e4c1921 | 518 | static void |
1ab3bf1b | 519 | read_tag_pointer_type PARAMS ((struct dieinfo *dip)); |
9e4c1921 | 520 | |
ec16f701 FF |
521 | static void |
522 | read_tag_string_type PARAMS ((struct dieinfo *dip)); | |
523 | ||
35f5886e | 524 | static void |
1ab3bf1b | 525 | read_subroutine_type PARAMS ((struct dieinfo *, char *, char *)); |
35f5886e FF |
526 | |
527 | static void | |
1ab3bf1b | 528 | read_enumeration PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
529 | |
530 | static struct type * | |
1ab3bf1b | 531 | struct_type PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
532 | |
533 | static struct type * | |
1ab3bf1b | 534 | enum_type PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e | 535 | |
35f5886e | 536 | static void |
1ab3bf1b | 537 | decode_line_numbers PARAMS ((char *)); |
35f5886e FF |
538 | |
539 | static struct type * | |
1ab3bf1b | 540 | decode_die_type PARAMS ((struct dieinfo *)); |
35f5886e FF |
541 | |
542 | static struct type * | |
1ab3bf1b | 543 | decode_mod_fund_type PARAMS ((char *)); |
35f5886e FF |
544 | |
545 | static struct type * | |
1ab3bf1b | 546 | decode_mod_u_d_type PARAMS ((char *)); |
35f5886e FF |
547 | |
548 | static struct type * | |
1c92ca6f | 549 | decode_modified_type PARAMS ((char *, unsigned int, int)); |
35f5886e FF |
550 | |
551 | static struct type * | |
1ab3bf1b | 552 | decode_fund_type PARAMS ((unsigned int)); |
35f5886e FF |
553 | |
554 | static char * | |
1ab3bf1b | 555 | create_name PARAMS ((char *, struct obstack *)); |
35f5886e | 556 | |
35f5886e | 557 | static struct type * |
13b5a7ff | 558 | lookup_utype PARAMS ((DIE_REF)); |
35f5886e FF |
559 | |
560 | static struct type * | |
13b5a7ff | 561 | alloc_utype PARAMS ((DIE_REF, struct type *)); |
35f5886e FF |
562 | |
563 | static struct symbol * | |
1ab3bf1b | 564 | new_symbol PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e | 565 | |
95ff889e FF |
566 | static void |
567 | synthesize_typedef PARAMS ((struct dieinfo *, struct objfile *, | |
568 | struct type *)); | |
569 | ||
35f5886e | 570 | static int |
1ab3bf1b | 571 | locval PARAMS ((char *)); |
35f5886e FF |
572 | |
573 | static void | |
1ab3bf1b JG |
574 | record_minimal_symbol PARAMS ((char *, CORE_ADDR, enum minimal_symbol_type, |
575 | struct objfile *)); | |
35f5886e | 576 | |
95ff889e FF |
577 | static void |
578 | set_cu_language PARAMS ((struct dieinfo *)); | |
579 | ||
bf229b4e FF |
580 | static struct type * |
581 | dwarf_fundamental_type PARAMS ((struct objfile *, int)); | |
582 | ||
583 | ||
584 | /* | |
585 | ||
586 | LOCAL FUNCTION | |
587 | ||
588 | dwarf_fundamental_type -- lookup or create a fundamental type | |
589 | ||
590 | SYNOPSIS | |
591 | ||
592 | struct type * | |
593 | dwarf_fundamental_type (struct objfile *objfile, int typeid) | |
594 | ||
595 | DESCRIPTION | |
596 | ||
597 | DWARF version 1 doesn't supply any fundamental type information, | |
598 | so gdb has to construct such types. It has a fixed number of | |
599 | fundamental types that it knows how to construct, which is the | |
600 | union of all types that it knows how to construct for all languages | |
601 | that it knows about. These are enumerated in gdbtypes.h. | |
602 | ||
603 | As an example, assume we find a DIE that references a DWARF | |
604 | fundamental type of FT_integer. We first look in the ftypes | |
605 | array to see if we already have such a type, indexed by the | |
606 | gdb internal value of FT_INTEGER. If so, we simply return a | |
607 | pointer to that type. If not, then we ask an appropriate | |
608 | language dependent routine to create a type FT_INTEGER, using | |
609 | defaults reasonable for the current target machine, and install | |
610 | that type in ftypes for future reference. | |
611 | ||
612 | RETURNS | |
613 | ||
614 | Pointer to a fundamental type. | |
615 | ||
616 | */ | |
617 | ||
618 | static struct type * | |
619 | dwarf_fundamental_type (objfile, typeid) | |
620 | struct objfile *objfile; | |
621 | int typeid; | |
622 | { | |
623 | if (typeid < 0 || typeid >= FT_NUM_MEMBERS) | |
624 | { | |
625 | error ("internal error - invalid fundamental type id %d", typeid); | |
626 | } | |
627 | ||
628 | /* Look for this particular type in the fundamental type vector. If one is | |
629 | not found, create and install one appropriate for the current language | |
630 | and the current target machine. */ | |
631 | ||
632 | if (ftypes[typeid] == NULL) | |
633 | { | |
634 | ftypes[typeid] = cu_language_defn -> la_fund_type(objfile, typeid); | |
635 | } | |
636 | ||
637 | return (ftypes[typeid]); | |
638 | } | |
639 | ||
95ff889e FF |
640 | /* |
641 | ||
642 | LOCAL FUNCTION | |
643 | ||
644 | set_cu_language -- set local copy of language for compilation unit | |
645 | ||
646 | SYNOPSIS | |
647 | ||
648 | void | |
649 | set_cu_language (struct dieinfo *dip) | |
650 | ||
651 | DESCRIPTION | |
652 | ||
653 | Decode the language attribute for a compilation unit DIE and | |
654 | remember what the language was. We use this at various times | |
655 | when processing DIE's for a given compilation unit. | |
656 | ||
657 | RETURNS | |
658 | ||
659 | No return value. | |
660 | ||
661 | */ | |
662 | ||
663 | static void | |
664 | set_cu_language (dip) | |
665 | struct dieinfo *dip; | |
666 | { | |
667 | switch (dip -> at_language) | |
668 | { | |
669 | case LANG_C89: | |
670 | case LANG_C: | |
671 | cu_language = language_c; | |
672 | break; | |
673 | case LANG_C_PLUS_PLUS: | |
674 | cu_language = language_cplus; | |
675 | break; | |
19cfe25d | 676 | /* start-sanitize-chill */ |
e58de8a2 FF |
677 | case LANG_CHILL: |
678 | cu_language = language_chill; | |
679 | break; | |
19cfe25d | 680 | /* end-sanitize-chill */ |
e58de8a2 FF |
681 | case LANG_MODULA2: |
682 | cu_language = language_m2; | |
683 | break; | |
95ff889e FF |
684 | case LANG_ADA83: |
685 | case LANG_COBOL74: | |
686 | case LANG_COBOL85: | |
687 | case LANG_FORTRAN77: | |
688 | case LANG_FORTRAN90: | |
689 | case LANG_PASCAL83: | |
2e4964ad | 690 | /* We don't know anything special about these yet. */ |
95ff889e FF |
691 | cu_language = language_unknown; |
692 | break; | |
2e4964ad FF |
693 | default: |
694 | /* If no at_language, try to deduce one from the filename */ | |
695 | cu_language = deduce_language_from_filename (dip -> at_name); | |
696 | break; | |
95ff889e | 697 | } |
bf229b4e | 698 | cu_language_defn = language_def (cu_language); |
95ff889e FF |
699 | } |
700 | ||
35f5886e FF |
701 | /* |
702 | ||
703 | GLOBAL FUNCTION | |
704 | ||
705 | dwarf_build_psymtabs -- build partial symtabs from DWARF debug info | |
706 | ||
707 | SYNOPSIS | |
708 | ||
d5931d79 | 709 | void dwarf_build_psymtabs (struct objfile *objfile, |
2670f34d | 710 | struct section_offsets *section_offsets, |
d5931d79 JG |
711 | int mainline, file_ptr dbfoff, unsigned int dbfsize, |
712 | file_ptr lnoffset, unsigned int lnsize) | |
35f5886e FF |
713 | |
714 | DESCRIPTION | |
715 | ||
716 | This function is called upon to build partial symtabs from files | |
717 | containing DIE's (Dwarf Information Entries) and DWARF line numbers. | |
718 | ||
d5931d79 | 719 | It is passed a bfd* containing the DIES |
35f5886e FF |
720 | and line number information, the corresponding filename for that |
721 | file, a base address for relocating the symbols, a flag indicating | |
722 | whether or not this debugging information is from a "main symbol | |
723 | table" rather than a shared library or dynamically linked file, | |
724 | and file offset/size pairs for the DIE information and line number | |
725 | information. | |
726 | ||
727 | RETURNS | |
728 | ||
729 | No return value. | |
730 | ||
731 | */ | |
732 | ||
733 | void | |
d5931d79 JG |
734 | dwarf_build_psymtabs (objfile, section_offsets, mainline, dbfoff, dbfsize, |
735 | lnoffset, lnsize) | |
736 | struct objfile *objfile; | |
2670f34d | 737 | struct section_offsets *section_offsets; |
1ab3bf1b | 738 | int mainline; |
d5931d79 | 739 | file_ptr dbfoff; |
4090fe1c | 740 | unsigned int dbfsize; |
d5931d79 | 741 | file_ptr lnoffset; |
1ab3bf1b | 742 | unsigned int lnsize; |
35f5886e | 743 | { |
d5931d79 | 744 | bfd *abfd = objfile->obfd; |
35f5886e FF |
745 | struct cleanup *back_to; |
746 | ||
95967e73 | 747 | current_objfile = objfile; |
4090fe1c | 748 | dbsize = dbfsize; |
35f5886e FF |
749 | dbbase = xmalloc (dbsize); |
750 | dbroff = 0; | |
d5931d79 JG |
751 | if ((bfd_seek (abfd, dbfoff, L_SET) != 0) || |
752 | (bfd_read (dbbase, dbsize, 1, abfd) != dbsize)) | |
35f5886e FF |
753 | { |
754 | free (dbbase); | |
d5931d79 | 755 | error ("can't read DWARF data from '%s'", bfd_get_filename (abfd)); |
35f5886e FF |
756 | } |
757 | back_to = make_cleanup (free, dbbase); | |
758 | ||
759 | /* If we are reinitializing, or if we have never loaded syms yet, init. | |
760 | Since we have no idea how many DIES we are looking at, we just guess | |
761 | some arbitrary value. */ | |
762 | ||
13b5a7ff FF |
763 | if (mainline || objfile -> global_psymbols.size == 0 || |
764 | objfile -> static_psymbols.size == 0) | |
35f5886e | 765 | { |
1ab3bf1b | 766 | init_psymbol_list (objfile, 1024); |
35f5886e FF |
767 | } |
768 | ||
84ffdec2 | 769 | /* Save the relocation factor where everybody can see it. */ |
f8b76e70 | 770 | |
2670f34d JG |
771 | base_section_offsets = section_offsets; |
772 | baseaddr = ANOFFSET (section_offsets, 0); | |
f8b76e70 | 773 | |
35f5886e FF |
774 | /* Follow the compilation unit sibling chain, building a partial symbol |
775 | table entry for each one. Save enough information about each compilation | |
776 | unit to locate the full DWARF information later. */ | |
777 | ||
d5931d79 | 778 | scan_compilation_units (dbbase, dbbase + dbsize, dbfoff, lnoffset, objfile); |
35f5886e | 779 | |
35f5886e | 780 | do_cleanups (back_to); |
95967e73 | 781 | current_objfile = NULL; |
35f5886e FF |
782 | } |
783 | ||
784 | ||
785 | /* | |
786 | ||
787 | LOCAL FUNCTION | |
788 | ||
1ab3bf1b | 789 | record_minimal_symbol -- add entry to gdb's minimal symbol table |
35f5886e FF |
790 | |
791 | SYNOPSIS | |
792 | ||
1ab3bf1b JG |
793 | static void record_minimal_symbol (char *name, CORE_ADDR address, |
794 | enum minimal_symbol_type ms_type, | |
795 | struct objfile *objfile) | |
35f5886e FF |
796 | |
797 | DESCRIPTION | |
798 | ||
799 | Given a pointer to the name of a symbol that should be added to the | |
1ab3bf1b | 800 | minimal symbol table, and the address associated with that |
35f5886e | 801 | symbol, records this information for later use in building the |
1ab3bf1b | 802 | minimal symbol table. |
35f5886e | 803 | |
35f5886e FF |
804 | */ |
805 | ||
806 | static void | |
1ab3bf1b JG |
807 | record_minimal_symbol (name, address, ms_type, objfile) |
808 | char *name; | |
809 | CORE_ADDR address; | |
810 | enum minimal_symbol_type ms_type; | |
811 | struct objfile *objfile; | |
35f5886e | 812 | { |
1ab3bf1b JG |
813 | name = obsavestring (name, strlen (name), &objfile -> symbol_obstack); |
814 | prim_record_minimal_symbol (name, address, ms_type); | |
35f5886e FF |
815 | } |
816 | ||
817 | /* | |
818 | ||
35f5886e FF |
819 | LOCAL FUNCTION |
820 | ||
821 | read_lexical_block_scope -- process all dies in a lexical block | |
822 | ||
823 | SYNOPSIS | |
824 | ||
825 | static void read_lexical_block_scope (struct dieinfo *dip, | |
826 | char *thisdie, char *enddie) | |
827 | ||
828 | DESCRIPTION | |
829 | ||
830 | Process all the DIES contained within a lexical block scope. | |
831 | Start a new scope, process the dies, and then close the scope. | |
832 | ||
833 | */ | |
834 | ||
835 | static void | |
1ab3bf1b JG |
836 | read_lexical_block_scope (dip, thisdie, enddie, objfile) |
837 | struct dieinfo *dip; | |
838 | char *thisdie; | |
839 | char *enddie; | |
840 | struct objfile *objfile; | |
35f5886e | 841 | { |
4d315a07 FF |
842 | register struct context_stack *new; |
843 | ||
4ed3a9ea | 844 | push_context (0, dip -> at_low_pc); |
13b5a7ff | 845 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 FF |
846 | new = pop_context (); |
847 | if (local_symbols != NULL) | |
848 | { | |
849 | finish_block (0, &local_symbols, new -> old_blocks, new -> start_addr, | |
1ab3bf1b | 850 | dip -> at_high_pc, objfile); |
4d315a07 FF |
851 | } |
852 | local_symbols = new -> locals; | |
35f5886e FF |
853 | } |
854 | ||
855 | /* | |
856 | ||
857 | LOCAL FUNCTION | |
858 | ||
859 | lookup_utype -- look up a user defined type from die reference | |
860 | ||
861 | SYNOPSIS | |
862 | ||
13b5a7ff | 863 | static type *lookup_utype (DIE_REF die_ref) |
35f5886e FF |
864 | |
865 | DESCRIPTION | |
866 | ||
867 | Given a DIE reference, lookup the user defined type associated with | |
868 | that DIE, if it has been registered already. If not registered, then | |
869 | return NULL. Alloc_utype() can be called to register an empty | |
870 | type for this reference, which will be filled in later when the | |
871 | actual referenced DIE is processed. | |
872 | */ | |
873 | ||
874 | static struct type * | |
13b5a7ff FF |
875 | lookup_utype (die_ref) |
876 | DIE_REF die_ref; | |
35f5886e FF |
877 | { |
878 | struct type *type = NULL; | |
879 | int utypeidx; | |
880 | ||
13b5a7ff | 881 | utypeidx = (die_ref - dbroff) / 4; |
35f5886e FF |
882 | if ((utypeidx < 0) || (utypeidx >= numutypes)) |
883 | { | |
51b80b00 | 884 | complain (&bad_die_ref, DIE_ID, DIE_NAME); |
35f5886e FF |
885 | } |
886 | else | |
887 | { | |
888 | type = *(utypes + utypeidx); | |
889 | } | |
890 | return (type); | |
891 | } | |
892 | ||
893 | ||
894 | /* | |
895 | ||
896 | LOCAL FUNCTION | |
897 | ||
898 | alloc_utype -- add a user defined type for die reference | |
899 | ||
900 | SYNOPSIS | |
901 | ||
13b5a7ff | 902 | static type *alloc_utype (DIE_REF die_ref, struct type *utypep) |
35f5886e FF |
903 | |
904 | DESCRIPTION | |
905 | ||
13b5a7ff | 906 | Given a die reference DIE_REF, and a possible pointer to a user |
35f5886e FF |
907 | defined type UTYPEP, register that this reference has a user |
908 | defined type and either use the specified type in UTYPEP or | |
909 | make a new empty type that will be filled in later. | |
910 | ||
911 | We should only be called after calling lookup_utype() to verify that | |
13b5a7ff | 912 | there is not currently a type registered for DIE_REF. |
35f5886e FF |
913 | */ |
914 | ||
915 | static struct type * | |
13b5a7ff FF |
916 | alloc_utype (die_ref, utypep) |
917 | DIE_REF die_ref; | |
1ab3bf1b | 918 | struct type *utypep; |
35f5886e FF |
919 | { |
920 | struct type **typep; | |
921 | int utypeidx; | |
922 | ||
13b5a7ff | 923 | utypeidx = (die_ref - dbroff) / 4; |
35f5886e FF |
924 | typep = utypes + utypeidx; |
925 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
926 | { | |
bf229b4e | 927 | utypep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
51b80b00 | 928 | complain (&bad_die_ref, DIE_ID, DIE_NAME); |
35f5886e FF |
929 | } |
930 | else if (*typep != NULL) | |
931 | { | |
932 | utypep = *typep; | |
51b80b00 | 933 | complain (&dup_user_type_allocation, DIE_ID, DIE_NAME); |
35f5886e FF |
934 | } |
935 | else | |
936 | { | |
937 | if (utypep == NULL) | |
938 | { | |
8050a57b | 939 | utypep = alloc_type (current_objfile); |
35f5886e FF |
940 | } |
941 | *typep = utypep; | |
942 | } | |
943 | return (utypep); | |
944 | } | |
945 | ||
946 | /* | |
947 | ||
948 | LOCAL FUNCTION | |
949 | ||
950 | decode_die_type -- return a type for a specified die | |
951 | ||
952 | SYNOPSIS | |
953 | ||
954 | static struct type *decode_die_type (struct dieinfo *dip) | |
955 | ||
956 | DESCRIPTION | |
957 | ||
958 | Given a pointer to a die information structure DIP, decode the | |
959 | type of the die and return a pointer to the decoded type. All | |
960 | dies without specific types default to type int. | |
961 | */ | |
962 | ||
963 | static struct type * | |
1ab3bf1b JG |
964 | decode_die_type (dip) |
965 | struct dieinfo *dip; | |
35f5886e FF |
966 | { |
967 | struct type *type = NULL; | |
968 | ||
969 | if (dip -> at_fund_type != 0) | |
970 | { | |
971 | type = decode_fund_type (dip -> at_fund_type); | |
972 | } | |
973 | else if (dip -> at_mod_fund_type != NULL) | |
974 | { | |
975 | type = decode_mod_fund_type (dip -> at_mod_fund_type); | |
976 | } | |
977 | else if (dip -> at_user_def_type) | |
978 | { | |
979 | if ((type = lookup_utype (dip -> at_user_def_type)) == NULL) | |
980 | { | |
981 | type = alloc_utype (dip -> at_user_def_type, NULL); | |
982 | } | |
983 | } | |
984 | else if (dip -> at_mod_u_d_type) | |
985 | { | |
986 | type = decode_mod_u_d_type (dip -> at_mod_u_d_type); | |
987 | } | |
988 | else | |
989 | { | |
bf229b4e | 990 | type = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
35f5886e FF |
991 | } |
992 | return (type); | |
993 | } | |
994 | ||
995 | /* | |
996 | ||
997 | LOCAL FUNCTION | |
998 | ||
999 | struct_type -- compute and return the type for a struct or union | |
1000 | ||
1001 | SYNOPSIS | |
1002 | ||
1003 | static struct type *struct_type (struct dieinfo *dip, char *thisdie, | |
8b5b6fae | 1004 | char *enddie, struct objfile *objfile) |
35f5886e FF |
1005 | |
1006 | DESCRIPTION | |
1007 | ||
1008 | Given pointer to a die information structure for a die which | |
715cafcb FF |
1009 | defines a union or structure (and MUST define one or the other), |
1010 | and pointers to the raw die data that define the range of dies which | |
1011 | define the members, compute and return the user defined type for the | |
1012 | structure or union. | |
35f5886e FF |
1013 | */ |
1014 | ||
1015 | static struct type * | |
1ab3bf1b JG |
1016 | struct_type (dip, thisdie, enddie, objfile) |
1017 | struct dieinfo *dip; | |
1018 | char *thisdie; | |
1019 | char *enddie; | |
1020 | struct objfile *objfile; | |
35f5886e FF |
1021 | { |
1022 | struct type *type; | |
1023 | struct nextfield { | |
1024 | struct nextfield *next; | |
1025 | struct field field; | |
1026 | }; | |
1027 | struct nextfield *list = NULL; | |
1028 | struct nextfield *new; | |
1029 | int nfields = 0; | |
1030 | int n; | |
1031 | char *tpart1; | |
35f5886e | 1032 | struct dieinfo mbr; |
8b5b6fae | 1033 | char *nextdie; |
a8a69e63 | 1034 | #if !BITS_BIG_ENDIAN |
50055e94 | 1035 | int anonymous_size; |
a8a69e63 | 1036 | #endif |
35f5886e | 1037 | |
13b5a7ff | 1038 | if ((type = lookup_utype (dip -> die_ref)) == NULL) |
35f5886e | 1039 | { |
5edf98d7 | 1040 | /* No forward references created an empty type, so install one now */ |
13b5a7ff | 1041 | type = alloc_utype (dip -> die_ref, NULL); |
35f5886e | 1042 | } |
a3723a43 | 1043 | INIT_CPLUS_SPECIFIC(type); |
13b5a7ff | 1044 | switch (dip -> die_tag) |
35f5886e | 1045 | { |
95ff889e FF |
1046 | case TAG_class_type: |
1047 | TYPE_CODE (type) = TYPE_CODE_CLASS; | |
1048 | tpart1 = "class"; | |
1049 | break; | |
715cafcb | 1050 | case TAG_structure_type: |
5edf98d7 | 1051 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
715cafcb FF |
1052 | tpart1 = "struct"; |
1053 | break; | |
1054 | case TAG_union_type: | |
1055 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
1056 | tpart1 = "union"; | |
1057 | break; | |
1058 | default: | |
1059 | /* Should never happen */ | |
1060 | TYPE_CODE (type) = TYPE_CODE_UNDEF; | |
1061 | tpart1 = "???"; | |
51b80b00 | 1062 | complain (&missing_tag, DIE_ID, DIE_NAME); |
715cafcb | 1063 | break; |
35f5886e | 1064 | } |
5edf98d7 FF |
1065 | /* Some compilers try to be helpful by inventing "fake" names for |
1066 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1067 | Thanks, but no thanks... */ | |
715cafcb FF |
1068 | if (dip -> at_name != NULL |
1069 | && *dip -> at_name != '~' | |
1070 | && *dip -> at_name != '.') | |
35f5886e | 1071 | { |
95967e73 | 1072 | TYPE_NAME (type) = obconcat (&objfile -> type_obstack, |
1ab3bf1b | 1073 | tpart1, " ", dip -> at_name); |
35f5886e | 1074 | } |
50055e94 FF |
1075 | /* Use whatever size is known. Zero is a valid size. We might however |
1076 | wish to check has_at_byte_size to make sure that some byte size was | |
1077 | given explicitly, but DWARF doesn't specify that explicit sizes of | |
1078 | zero have to present, so complaining about missing sizes should | |
1079 | probably not be the default. */ | |
1080 | TYPE_LENGTH (type) = dip -> at_byte_size; | |
13b5a7ff | 1081 | thisdie += dip -> die_length; |
35f5886e FF |
1082 | while (thisdie < enddie) |
1083 | { | |
95967e73 FF |
1084 | basicdieinfo (&mbr, thisdie, objfile); |
1085 | completedieinfo (&mbr, objfile); | |
13b5a7ff | 1086 | if (mbr.die_length <= SIZEOF_DIE_LENGTH) |
35f5886e FF |
1087 | { |
1088 | break; | |
1089 | } | |
8b5b6fae FF |
1090 | else if (mbr.at_sibling != 0) |
1091 | { | |
1092 | nextdie = dbbase + mbr.at_sibling - dbroff; | |
1093 | } | |
1094 | else | |
1095 | { | |
13b5a7ff | 1096 | nextdie = thisdie + mbr.die_length; |
8b5b6fae | 1097 | } |
13b5a7ff | 1098 | switch (mbr.die_tag) |
35f5886e FF |
1099 | { |
1100 | case TAG_member: | |
1101 | /* Get space to record the next field's data. */ | |
1102 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1103 | new -> next = list; | |
1104 | list = new; | |
1105 | /* Save the data. */ | |
50e0dc41 FF |
1106 | list -> field.name = |
1107 | obsavestring (mbr.at_name, strlen (mbr.at_name), | |
1108 | &objfile -> type_obstack); | |
35f5886e FF |
1109 | list -> field.type = decode_die_type (&mbr); |
1110 | list -> field.bitpos = 8 * locval (mbr.at_location); | |
4db8e515 FF |
1111 | /* Handle bit fields. */ |
1112 | list -> field.bitsize = mbr.at_bit_size; | |
1113 | #if BITS_BIG_ENDIAN | |
1114 | /* For big endian bits, the at_bit_offset gives the additional | |
1115 | bit offset from the MSB of the containing anonymous object to | |
1116 | the MSB of the field. We don't have to do anything special | |
1117 | since we don't need to know the size of the anonymous object. */ | |
1118 | list -> field.bitpos += mbr.at_bit_offset; | |
1119 | #else | |
1120 | /* For little endian bits, we need to have a non-zero at_bit_size, | |
1121 | so that we know we are in fact dealing with a bitfield. Compute | |
1122 | the bit offset to the MSB of the anonymous object, subtract off | |
1123 | the number of bits from the MSB of the field to the MSB of the | |
1124 | object, and then subtract off the number of bits of the field | |
1125 | itself. The result is the bit offset of the LSB of the field. */ | |
1126 | if (mbr.at_bit_size > 0) | |
1127 | { | |
50055e94 FF |
1128 | if (mbr.has_at_byte_size) |
1129 | { | |
1130 | /* The size of the anonymous object containing the bit field | |
1131 | is explicit, so use the indicated size (in bytes). */ | |
1132 | anonymous_size = mbr.at_byte_size; | |
1133 | } | |
1134 | else | |
1135 | { | |
1136 | /* The size of the anonymous object containing the bit field | |
1137 | matches the size of an object of the bit field's type. | |
1138 | DWARF allows at_byte_size to be left out in such cases, | |
1139 | as a debug information size optimization. */ | |
1140 | anonymous_size = TYPE_LENGTH (list -> field.type); | |
1141 | } | |
4db8e515 | 1142 | list -> field.bitpos += |
50055e94 | 1143 | anonymous_size * 8 - mbr.at_bit_offset - mbr.at_bit_size; |
4db8e515 FF |
1144 | } |
1145 | #endif | |
35f5886e FF |
1146 | nfields++; |
1147 | break; | |
1148 | default: | |
8b5b6fae | 1149 | process_dies (thisdie, nextdie, objfile); |
35f5886e FF |
1150 | break; |
1151 | } | |
8b5b6fae | 1152 | thisdie = nextdie; |
35f5886e | 1153 | } |
5edf98d7 FF |
1154 | /* Now create the vector of fields, and record how big it is. We may |
1155 | not even have any fields, if this DIE was generated due to a reference | |
1156 | to an anonymous structure or union. In this case, TYPE_FLAG_STUB is | |
1157 | set, which clues gdb in to the fact that it needs to search elsewhere | |
1158 | for the full structure definition. */ | |
1159 | if (nfields == 0) | |
35f5886e | 1160 | { |
5edf98d7 FF |
1161 | TYPE_FLAGS (type) |= TYPE_FLAG_STUB; |
1162 | } | |
1163 | else | |
1164 | { | |
1165 | TYPE_NFIELDS (type) = nfields; | |
1166 | TYPE_FIELDS (type) = (struct field *) | |
dac9734e | 1167 | TYPE_ALLOC (type, sizeof (struct field) * nfields); |
5edf98d7 FF |
1168 | /* Copy the saved-up fields into the field vector. */ |
1169 | for (n = nfields; list; list = list -> next) | |
1170 | { | |
1171 | TYPE_FIELD (type, --n) = list -> field; | |
1172 | } | |
1173 | } | |
35f5886e FF |
1174 | return (type); |
1175 | } | |
1176 | ||
1177 | /* | |
1178 | ||
1179 | LOCAL FUNCTION | |
1180 | ||
1181 | read_structure_scope -- process all dies within struct or union | |
1182 | ||
1183 | SYNOPSIS | |
1184 | ||
1185 | static void read_structure_scope (struct dieinfo *dip, | |
8b5b6fae | 1186 | char *thisdie, char *enddie, struct objfile *objfile) |
35f5886e FF |
1187 | |
1188 | DESCRIPTION | |
1189 | ||
1190 | Called when we find the DIE that starts a structure or union | |
1191 | scope (definition) to process all dies that define the members | |
1192 | of the structure or union. DIP is a pointer to the die info | |
1193 | struct for the DIE that names the structure or union. | |
1194 | ||
1195 | NOTES | |
1196 | ||
1197 | Note that we need to call struct_type regardless of whether or not | |
84ce6717 FF |
1198 | the DIE has an at_name attribute, since it might be an anonymous |
1199 | structure or union. This gets the type entered into our set of | |
1200 | user defined types. | |
1201 | ||
1202 | However, if the structure is incomplete (an opaque struct/union) | |
1203 | then suppress creating a symbol table entry for it since gdb only | |
1204 | wants to find the one with the complete definition. Note that if | |
1205 | it is complete, we just call new_symbol, which does it's own | |
1206 | checking about whether the struct/union is anonymous or not (and | |
1207 | suppresses creating a symbol table entry itself). | |
1208 | ||
35f5886e FF |
1209 | */ |
1210 | ||
1211 | static void | |
1ab3bf1b JG |
1212 | read_structure_scope (dip, thisdie, enddie, objfile) |
1213 | struct dieinfo *dip; | |
1214 | char *thisdie; | |
1215 | char *enddie; | |
1216 | struct objfile *objfile; | |
35f5886e FF |
1217 | { |
1218 | struct type *type; | |
1219 | struct symbol *sym; | |
1220 | ||
8b5b6fae | 1221 | type = struct_type (dip, thisdie, enddie, objfile); |
84ce6717 | 1222 | if (!(TYPE_FLAGS (type) & TYPE_FLAG_STUB)) |
35f5886e | 1223 | { |
95ff889e FF |
1224 | sym = new_symbol (dip, objfile); |
1225 | if (sym != NULL) | |
84ce6717 FF |
1226 | { |
1227 | SYMBOL_TYPE (sym) = type; | |
95ff889e FF |
1228 | if (cu_language == language_cplus) |
1229 | { | |
1230 | synthesize_typedef (dip, objfile, type); | |
1231 | } | |
84ce6717 | 1232 | } |
35f5886e FF |
1233 | } |
1234 | } | |
1235 | ||
1236 | /* | |
1237 | ||
1238 | LOCAL FUNCTION | |
1239 | ||
1240 | decode_array_element_type -- decode type of the array elements | |
1241 | ||
1242 | SYNOPSIS | |
1243 | ||
1244 | static struct type *decode_array_element_type (char *scan, char *end) | |
1245 | ||
1246 | DESCRIPTION | |
1247 | ||
1248 | As the last step in decoding the array subscript information for an | |
1249 | array DIE, we need to decode the type of the array elements. We are | |
1250 | passed a pointer to this last part of the subscript information and | |
1251 | must return the appropriate type. If the type attribute is not | |
1252 | recognized, just warn about the problem and return type int. | |
1253 | */ | |
1254 | ||
1255 | static struct type * | |
84ffdec2 | 1256 | decode_array_element_type (scan) |
1ab3bf1b | 1257 | char *scan; |
35f5886e FF |
1258 | { |
1259 | struct type *typep; | |
13b5a7ff FF |
1260 | DIE_REF die_ref; |
1261 | unsigned short attribute; | |
35f5886e | 1262 | unsigned short fundtype; |
13b5a7ff | 1263 | int nbytes; |
35f5886e | 1264 | |
13b5a7ff FF |
1265 | attribute = target_to_host (scan, SIZEOF_ATTRIBUTE, GET_UNSIGNED, |
1266 | current_objfile); | |
1267 | scan += SIZEOF_ATTRIBUTE; | |
1268 | if ((nbytes = attribute_size (attribute)) == -1) | |
1269 | { | |
51b80b00 | 1270 | complain (&bad_array_element_type, DIE_ID, DIE_NAME, attribute); |
bf229b4e | 1271 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff FF |
1272 | } |
1273 | else | |
1274 | { | |
1275 | switch (attribute) | |
1276 | { | |
1277 | case AT_fund_type: | |
1278 | fundtype = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1279 | current_objfile); | |
1280 | typep = decode_fund_type (fundtype); | |
1281 | break; | |
1282 | case AT_mod_fund_type: | |
1283 | typep = decode_mod_fund_type (scan); | |
1284 | break; | |
1285 | case AT_user_def_type: | |
1286 | die_ref = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1287 | current_objfile); | |
1288 | if ((typep = lookup_utype (die_ref)) == NULL) | |
1289 | { | |
1290 | typep = alloc_utype (die_ref, NULL); | |
1291 | } | |
1292 | break; | |
1293 | case AT_mod_u_d_type: | |
1294 | typep = decode_mod_u_d_type (scan); | |
1295 | break; | |
1296 | default: | |
51b80b00 | 1297 | complain (&bad_array_element_type, DIE_ID, DIE_NAME, attribute); |
bf229b4e | 1298 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff FF |
1299 | break; |
1300 | } | |
35f5886e FF |
1301 | } |
1302 | return (typep); | |
1303 | } | |
1304 | ||
1305 | /* | |
1306 | ||
1307 | LOCAL FUNCTION | |
1308 | ||
85f0a848 | 1309 | decode_subscript_data_item -- decode array subscript item |
35f5886e FF |
1310 | |
1311 | SYNOPSIS | |
1312 | ||
85f0a848 FF |
1313 | static struct type * |
1314 | decode_subscript_data_item (char *scan, char *end) | |
35f5886e FF |
1315 | |
1316 | DESCRIPTION | |
1317 | ||
1318 | The array subscripts and the data type of the elements of an | |
1319 | array are described by a list of data items, stored as a block | |
1320 | of contiguous bytes. There is a data item describing each array | |
1321 | dimension, and a final data item describing the element type. | |
1322 | The data items are ordered the same as their appearance in the | |
1323 | source (I.E. leftmost dimension first, next to leftmost second, | |
1324 | etc). | |
1325 | ||
85f0a848 FF |
1326 | The data items describing each array dimension consist of four |
1327 | parts: (1) a format specifier, (2) type type of the subscript | |
1328 | index, (3) a description of the low bound of the array dimension, | |
1329 | and (4) a description of the high bound of the array dimension. | |
1330 | ||
1331 | The last data item is the description of the type of each of | |
1332 | the array elements. | |
1333 | ||
35f5886e | 1334 | We are passed a pointer to the start of the block of bytes |
85f0a848 FF |
1335 | containing the remaining data items, and a pointer to the first |
1336 | byte past the data. This function recursively decodes the | |
1337 | remaining data items and returns a type. | |
1338 | ||
1339 | If we somehow fail to decode some data, we complain about it | |
1340 | and return a type "array of int". | |
35f5886e FF |
1341 | |
1342 | BUGS | |
1343 | FIXME: This code only implements the forms currently used | |
1344 | by the AT&T and GNU C compilers. | |
1345 | ||
1346 | The end pointer is supplied for error checking, maybe we should | |
1347 | use it for that... | |
1348 | */ | |
1349 | ||
1350 | static struct type * | |
85f0a848 | 1351 | decode_subscript_data_item (scan, end) |
1ab3bf1b JG |
1352 | char *scan; |
1353 | char *end; | |
35f5886e | 1354 | { |
85f0a848 FF |
1355 | struct type *typep = NULL; /* Array type we are building */ |
1356 | struct type *nexttype; /* Type of each element (may be array) */ | |
1357 | struct type *indextype; /* Type of this index */ | |
a8a69e63 | 1358 | struct type *rangetype; |
13b5a7ff FF |
1359 | unsigned int format; |
1360 | unsigned short fundtype; | |
1361 | unsigned long lowbound; | |
1362 | unsigned long highbound; | |
1363 | int nbytes; | |
35f5886e | 1364 | |
13b5a7ff FF |
1365 | format = target_to_host (scan, SIZEOF_FORMAT_SPECIFIER, GET_UNSIGNED, |
1366 | current_objfile); | |
1367 | scan += SIZEOF_FORMAT_SPECIFIER; | |
35f5886e FF |
1368 | switch (format) |
1369 | { | |
1370 | case FMT_ET: | |
84ffdec2 | 1371 | typep = decode_array_element_type (scan); |
35f5886e FF |
1372 | break; |
1373 | case FMT_FT_C_C: | |
13b5a7ff FF |
1374 | fundtype = target_to_host (scan, SIZEOF_FMT_FT, GET_UNSIGNED, |
1375 | current_objfile); | |
85f0a848 | 1376 | indextype = decode_fund_type (fundtype); |
13b5a7ff | 1377 | scan += SIZEOF_FMT_FT; |
160be0de FF |
1378 | nbytes = TARGET_FT_LONG_SIZE (current_objfile); |
1379 | lowbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1380 | scan += nbytes; | |
1381 | highbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1382 | scan += nbytes; | |
85f0a848 FF |
1383 | nexttype = decode_subscript_data_item (scan, end); |
1384 | if (nexttype == NULL) | |
35f5886e | 1385 | { |
85f0a848 | 1386 | /* Munged subscript data or other problem, fake it. */ |
51b80b00 | 1387 | complain (&subscript_data_items, DIE_ID, DIE_NAME); |
85f0a848 FF |
1388 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1389 | } | |
a8a69e63 FF |
1390 | rangetype = create_range_type ((struct type *) NULL, indextype, |
1391 | lowbound, highbound); | |
1392 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
35f5886e FF |
1393 | break; |
1394 | case FMT_FT_C_X: | |
1395 | case FMT_FT_X_C: | |
1396 | case FMT_FT_X_X: | |
1397 | case FMT_UT_C_C: | |
1398 | case FMT_UT_C_X: | |
1399 | case FMT_UT_X_C: | |
1400 | case FMT_UT_X_X: | |
51b80b00 | 1401 | complain (&unhandled_array_subscript_format, DIE_ID, DIE_NAME, format); |
a8a69e63 FF |
1402 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1403 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1404 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
35f5886e FF |
1405 | break; |
1406 | default: | |
51b80b00 | 1407 | complain (&unknown_array_subscript_format, DIE_ID, DIE_NAME, format); |
a8a69e63 FF |
1408 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1409 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1410 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
35f5886e FF |
1411 | break; |
1412 | } | |
1413 | return (typep); | |
1414 | } | |
1415 | ||
1416 | /* | |
1417 | ||
1418 | LOCAL FUNCTION | |
1419 | ||
4d315a07 | 1420 | dwarf_read_array_type -- read TAG_array_type DIE |
35f5886e FF |
1421 | |
1422 | SYNOPSIS | |
1423 | ||
4d315a07 | 1424 | static void dwarf_read_array_type (struct dieinfo *dip) |
35f5886e FF |
1425 | |
1426 | DESCRIPTION | |
1427 | ||
1428 | Extract all information from a TAG_array_type DIE and add to | |
1429 | the user defined type vector. | |
1430 | */ | |
1431 | ||
1432 | static void | |
1ab3bf1b JG |
1433 | dwarf_read_array_type (dip) |
1434 | struct dieinfo *dip; | |
35f5886e FF |
1435 | { |
1436 | struct type *type; | |
af213624 | 1437 | struct type *utype; |
35f5886e FF |
1438 | char *sub; |
1439 | char *subend; | |
13b5a7ff FF |
1440 | unsigned short blocksz; |
1441 | int nbytes; | |
35f5886e FF |
1442 | |
1443 | if (dip -> at_ordering != ORD_row_major) | |
1444 | { | |
1445 | /* FIXME: Can gdb even handle column major arrays? */ | |
51b80b00 | 1446 | complain (¬_row_major, DIE_ID, DIE_NAME); |
35f5886e FF |
1447 | } |
1448 | if ((sub = dip -> at_subscr_data) != NULL) | |
1449 | { | |
13b5a7ff FF |
1450 | nbytes = attribute_size (AT_subscr_data); |
1451 | blocksz = target_to_host (sub, nbytes, GET_UNSIGNED, current_objfile); | |
1452 | subend = sub + nbytes + blocksz; | |
1453 | sub += nbytes; | |
85f0a848 FF |
1454 | type = decode_subscript_data_item (sub, subend); |
1455 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) | |
35f5886e | 1456 | { |
85f0a848 FF |
1457 | /* Install user defined type that has not been referenced yet. */ |
1458 | alloc_utype (dip -> die_ref, type); | |
1459 | } | |
1460 | else if (TYPE_CODE (utype) == TYPE_CODE_UNDEF) | |
1461 | { | |
1462 | /* Ick! A forward ref has already generated a blank type in our | |
1463 | slot, and this type probably already has things pointing to it | |
1464 | (which is what caused it to be created in the first place). | |
1465 | If it's just a place holder we can plop our fully defined type | |
1466 | on top of it. We can't recover the space allocated for our | |
1467 | new type since it might be on an obstack, but we could reuse | |
1468 | it if we kept a list of them, but it might not be worth it | |
1469 | (FIXME). */ | |
1470 | *utype = *type; | |
35f5886e FF |
1471 | } |
1472 | else | |
1473 | { | |
85f0a848 FF |
1474 | /* Double ick! Not only is a type already in our slot, but |
1475 | someone has decorated it. Complain and leave it alone. */ | |
51b80b00 | 1476 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); |
35f5886e FF |
1477 | } |
1478 | } | |
1479 | } | |
1480 | ||
1481 | /* | |
1482 | ||
9e4c1921 FF |
1483 | LOCAL FUNCTION |
1484 | ||
1485 | read_tag_pointer_type -- read TAG_pointer_type DIE | |
1486 | ||
1487 | SYNOPSIS | |
1488 | ||
1489 | static void read_tag_pointer_type (struct dieinfo *dip) | |
1490 | ||
1491 | DESCRIPTION | |
1492 | ||
1493 | Extract all information from a TAG_pointer_type DIE and add to | |
1494 | the user defined type vector. | |
1495 | */ | |
1496 | ||
1497 | static void | |
1ab3bf1b JG |
1498 | read_tag_pointer_type (dip) |
1499 | struct dieinfo *dip; | |
9e4c1921 FF |
1500 | { |
1501 | struct type *type; | |
1502 | struct type *utype; | |
9e4c1921 FF |
1503 | |
1504 | type = decode_die_type (dip); | |
13b5a7ff | 1505 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) |
9e4c1921 FF |
1506 | { |
1507 | utype = lookup_pointer_type (type); | |
4ed3a9ea | 1508 | alloc_utype (dip -> die_ref, utype); |
9e4c1921 FF |
1509 | } |
1510 | else | |
1511 | { | |
1512 | TYPE_TARGET_TYPE (utype) = type; | |
1513 | TYPE_POINTER_TYPE (type) = utype; | |
1514 | ||
1515 | /* We assume the machine has only one representation for pointers! */ | |
1516 | /* FIXME: This confuses host<->target data representations, and is a | |
1517 | poor assumption besides. */ | |
1518 | ||
1519 | TYPE_LENGTH (utype) = sizeof (char *); | |
1520 | TYPE_CODE (utype) = TYPE_CODE_PTR; | |
1521 | } | |
1522 | } | |
1523 | ||
1524 | /* | |
1525 | ||
ec16f701 FF |
1526 | LOCAL FUNCTION |
1527 | ||
1528 | read_tag_string_type -- read TAG_string_type DIE | |
1529 | ||
1530 | SYNOPSIS | |
1531 | ||
1532 | static void read_tag_string_type (struct dieinfo *dip) | |
1533 | ||
1534 | DESCRIPTION | |
1535 | ||
1536 | Extract all information from a TAG_string_type DIE and add to | |
1537 | the user defined type vector. It isn't really a user defined | |
1538 | type, but it behaves like one, with other DIE's using an | |
1539 | AT_user_def_type attribute to reference it. | |
1540 | */ | |
1541 | ||
1542 | static void | |
1543 | read_tag_string_type (dip) | |
1544 | struct dieinfo *dip; | |
1545 | { | |
1546 | struct type *utype; | |
1547 | struct type *indextype; | |
1548 | struct type *rangetype; | |
1549 | unsigned long lowbound = 0; | |
1550 | unsigned long highbound; | |
1551 | ||
b6236d6e | 1552 | if (dip -> has_at_byte_size) |
ec16f701 | 1553 | { |
b6236d6e FF |
1554 | /* A fixed bounds string */ |
1555 | highbound = dip -> at_byte_size - 1; | |
ec16f701 FF |
1556 | } |
1557 | else | |
1558 | { | |
b6236d6e FF |
1559 | /* A varying length string. Stub for now. (FIXME) */ |
1560 | highbound = 1; | |
1561 | } | |
1562 | indextype = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1563 | rangetype = create_range_type ((struct type *) NULL, indextype, lowbound, | |
1564 | highbound); | |
1565 | ||
1566 | utype = lookup_utype (dip -> die_ref); | |
1567 | if (utype == NULL) | |
1568 | { | |
1569 | /* No type defined, go ahead and create a blank one to use. */ | |
1570 | utype = alloc_utype (dip -> die_ref, (struct type *) NULL); | |
1571 | } | |
1572 | else | |
1573 | { | |
1574 | /* Already a type in our slot due to a forward reference. Make sure it | |
1575 | is a blank one. If not, complain and leave it alone. */ | |
1576 | if (TYPE_CODE (utype) != TYPE_CODE_UNDEF) | |
ec16f701 | 1577 | { |
b6236d6e FF |
1578 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); |
1579 | return; | |
ec16f701 | 1580 | } |
ec16f701 | 1581 | } |
b6236d6e FF |
1582 | |
1583 | /* Create the string type using the blank type we either found or created. */ | |
1584 | utype = create_string_type (utype, rangetype); | |
ec16f701 FF |
1585 | } |
1586 | ||
1587 | /* | |
1588 | ||
35f5886e FF |
1589 | LOCAL FUNCTION |
1590 | ||
1591 | read_subroutine_type -- process TAG_subroutine_type dies | |
1592 | ||
1593 | SYNOPSIS | |
1594 | ||
1595 | static void read_subroutine_type (struct dieinfo *dip, char thisdie, | |
1596 | char *enddie) | |
1597 | ||
1598 | DESCRIPTION | |
1599 | ||
1600 | Handle DIES due to C code like: | |
1601 | ||
1602 | struct foo { | |
1603 | int (*funcp)(int a, long l); (Generates TAG_subroutine_type DIE) | |
1604 | int b; | |
1605 | }; | |
1606 | ||
1607 | NOTES | |
1608 | ||
1609 | The parameter DIES are currently ignored. See if gdb has a way to | |
1610 | include this info in it's type system, and decode them if so. Is | |
1611 | this what the type structure's "arg_types" field is for? (FIXME) | |
1612 | */ | |
1613 | ||
1614 | static void | |
1ab3bf1b JG |
1615 | read_subroutine_type (dip, thisdie, enddie) |
1616 | struct dieinfo *dip; | |
1617 | char *thisdie; | |
1618 | char *enddie; | |
35f5886e | 1619 | { |
af213624 FF |
1620 | struct type *type; /* Type that this function returns */ |
1621 | struct type *ftype; /* Function that returns above type */ | |
35f5886e | 1622 | |
af213624 FF |
1623 | /* Decode the type that this subroutine returns */ |
1624 | ||
35f5886e | 1625 | type = decode_die_type (dip); |
af213624 FF |
1626 | |
1627 | /* Check to see if we already have a partially constructed user | |
1628 | defined type for this DIE, from a forward reference. */ | |
1629 | ||
13b5a7ff | 1630 | if ((ftype = lookup_utype (dip -> die_ref)) == NULL) |
af213624 FF |
1631 | { |
1632 | /* This is the first reference to one of these types. Make | |
1633 | a new one and place it in the user defined types. */ | |
1634 | ftype = lookup_function_type (type); | |
4ed3a9ea | 1635 | alloc_utype (dip -> die_ref, ftype); |
af213624 | 1636 | } |
85f0a848 | 1637 | else if (TYPE_CODE (ftype) == TYPE_CODE_UNDEF) |
af213624 FF |
1638 | { |
1639 | /* We have an existing partially constructed type, so bash it | |
1640 | into the correct type. */ | |
1641 | TYPE_TARGET_TYPE (ftype) = type; | |
1642 | TYPE_FUNCTION_TYPE (type) = ftype; | |
1643 | TYPE_LENGTH (ftype) = 1; | |
1644 | TYPE_CODE (ftype) = TYPE_CODE_FUNC; | |
1645 | } | |
85f0a848 FF |
1646 | else |
1647 | { | |
51b80b00 | 1648 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); |
85f0a848 | 1649 | } |
35f5886e FF |
1650 | } |
1651 | ||
1652 | /* | |
1653 | ||
1654 | LOCAL FUNCTION | |
1655 | ||
1656 | read_enumeration -- process dies which define an enumeration | |
1657 | ||
1658 | SYNOPSIS | |
1659 | ||
1660 | static void read_enumeration (struct dieinfo *dip, char *thisdie, | |
1ab3bf1b | 1661 | char *enddie, struct objfile *objfile) |
35f5886e FF |
1662 | |
1663 | DESCRIPTION | |
1664 | ||
1665 | Given a pointer to a die which begins an enumeration, process all | |
1666 | the dies that define the members of the enumeration. | |
1667 | ||
1668 | NOTES | |
1669 | ||
1670 | Note that we need to call enum_type regardless of whether or not we | |
1671 | have a symbol, since we might have an enum without a tag name (thus | |
1672 | no symbol for the tagname). | |
1673 | */ | |
1674 | ||
1675 | static void | |
1ab3bf1b JG |
1676 | read_enumeration (dip, thisdie, enddie, objfile) |
1677 | struct dieinfo *dip; | |
1678 | char *thisdie; | |
1679 | char *enddie; | |
1680 | struct objfile *objfile; | |
35f5886e FF |
1681 | { |
1682 | struct type *type; | |
1683 | struct symbol *sym; | |
1684 | ||
1ab3bf1b | 1685 | type = enum_type (dip, objfile); |
95ff889e FF |
1686 | sym = new_symbol (dip, objfile); |
1687 | if (sym != NULL) | |
35f5886e FF |
1688 | { |
1689 | SYMBOL_TYPE (sym) = type; | |
95ff889e FF |
1690 | if (cu_language == language_cplus) |
1691 | { | |
1692 | synthesize_typedef (dip, objfile, type); | |
1693 | } | |
35f5886e FF |
1694 | } |
1695 | } | |
1696 | ||
1697 | /* | |
1698 | ||
1699 | LOCAL FUNCTION | |
1700 | ||
1701 | enum_type -- decode and return a type for an enumeration | |
1702 | ||
1703 | SYNOPSIS | |
1704 | ||
1ab3bf1b | 1705 | static type *enum_type (struct dieinfo *dip, struct objfile *objfile) |
35f5886e FF |
1706 | |
1707 | DESCRIPTION | |
1708 | ||
1709 | Given a pointer to a die information structure for the die which | |
1710 | starts an enumeration, process all the dies that define the members | |
1711 | of the enumeration and return a type pointer for the enumeration. | |
98618bf7 | 1712 | |
715cafcb FF |
1713 | At the same time, for each member of the enumeration, create a |
1714 | symbol for it with namespace VAR_NAMESPACE and class LOC_CONST, | |
1715 | and give it the type of the enumeration itself. | |
1716 | ||
1717 | NOTES | |
1718 | ||
98618bf7 FF |
1719 | Note that the DWARF specification explicitly mandates that enum |
1720 | constants occur in reverse order from the source program order, | |
1721 | for "consistency" and because this ordering is easier for many | |
1ab3bf1b | 1722 | compilers to generate. (Draft 6, sec 3.8.5, Enumeration type |
715cafcb FF |
1723 | Entries). Because gdb wants to see the enum members in program |
1724 | source order, we have to ensure that the order gets reversed while | |
98618bf7 | 1725 | we are processing them. |
35f5886e FF |
1726 | */ |
1727 | ||
1728 | static struct type * | |
1ab3bf1b JG |
1729 | enum_type (dip, objfile) |
1730 | struct dieinfo *dip; | |
1731 | struct objfile *objfile; | |
35f5886e FF |
1732 | { |
1733 | struct type *type; | |
1734 | struct nextfield { | |
1735 | struct nextfield *next; | |
1736 | struct field field; | |
1737 | }; | |
1738 | struct nextfield *list = NULL; | |
1739 | struct nextfield *new; | |
1740 | int nfields = 0; | |
1741 | int n; | |
35f5886e FF |
1742 | char *scan; |
1743 | char *listend; | |
13b5a7ff | 1744 | unsigned short blocksz; |
715cafcb | 1745 | struct symbol *sym; |
13b5a7ff | 1746 | int nbytes; |
35f5886e | 1747 | |
13b5a7ff | 1748 | if ((type = lookup_utype (dip -> die_ref)) == NULL) |
35f5886e | 1749 | { |
84ce6717 | 1750 | /* No forward references created an empty type, so install one now */ |
13b5a7ff | 1751 | type = alloc_utype (dip -> die_ref, NULL); |
35f5886e FF |
1752 | } |
1753 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
84ce6717 FF |
1754 | /* Some compilers try to be helpful by inventing "fake" names for |
1755 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1756 | Thanks, but no thanks... */ | |
715cafcb FF |
1757 | if (dip -> at_name != NULL |
1758 | && *dip -> at_name != '~' | |
1759 | && *dip -> at_name != '.') | |
35f5886e | 1760 | { |
95967e73 | 1761 | TYPE_NAME (type) = obconcat (&objfile -> type_obstack, "enum", |
1ab3bf1b | 1762 | " ", dip -> at_name); |
35f5886e | 1763 | } |
715cafcb | 1764 | if (dip -> at_byte_size != 0) |
35f5886e FF |
1765 | { |
1766 | TYPE_LENGTH (type) = dip -> at_byte_size; | |
35f5886e | 1767 | } |
35f5886e FF |
1768 | if ((scan = dip -> at_element_list) != NULL) |
1769 | { | |
768be6e1 FF |
1770 | if (dip -> short_element_list) |
1771 | { | |
13b5a7ff | 1772 | nbytes = attribute_size (AT_short_element_list); |
768be6e1 FF |
1773 | } |
1774 | else | |
1775 | { | |
13b5a7ff | 1776 | nbytes = attribute_size (AT_element_list); |
768be6e1 | 1777 | } |
13b5a7ff FF |
1778 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); |
1779 | listend = scan + nbytes + blocksz; | |
1780 | scan += nbytes; | |
35f5886e FF |
1781 | while (scan < listend) |
1782 | { | |
1783 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1784 | new -> next = list; | |
1785 | list = new; | |
1786 | list -> field.type = NULL; | |
1787 | list -> field.bitsize = 0; | |
13b5a7ff FF |
1788 | list -> field.bitpos = |
1789 | target_to_host (scan, TARGET_FT_LONG_SIZE (objfile), GET_SIGNED, | |
1790 | objfile); | |
1791 | scan += TARGET_FT_LONG_SIZE (objfile); | |
50e0dc41 FF |
1792 | list -> field.name = obsavestring (scan, strlen (scan), |
1793 | &objfile -> type_obstack); | |
35f5886e FF |
1794 | scan += strlen (scan) + 1; |
1795 | nfields++; | |
715cafcb | 1796 | /* Handcraft a new symbol for this enum member. */ |
1ab3bf1b | 1797 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
715cafcb | 1798 | sizeof (struct symbol)); |
4ed3a9ea | 1799 | memset (sym, 0, sizeof (struct symbol)); |
13b5a7ff FF |
1800 | SYMBOL_NAME (sym) = create_name (list -> field.name, |
1801 | &objfile->symbol_obstack); | |
7532cf10 | 1802 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); |
715cafcb FF |
1803 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
1804 | SYMBOL_CLASS (sym) = LOC_CONST; | |
1805 | SYMBOL_TYPE (sym) = type; | |
1806 | SYMBOL_VALUE (sym) = list -> field.bitpos; | |
4d315a07 | 1807 | add_symbol_to_list (sym, list_in_scope); |
35f5886e | 1808 | } |
84ce6717 | 1809 | /* Now create the vector of fields, and record how big it is. This is |
0efe20a6 | 1810 | where we reverse the order, by pulling the members off the list in |
84ce6717 FF |
1811 | reverse order from how they were inserted. If we have no fields |
1812 | (this is apparently possible in C++) then skip building a field | |
1813 | vector. */ | |
1814 | if (nfields > 0) | |
1815 | { | |
1816 | TYPE_NFIELDS (type) = nfields; | |
1817 | TYPE_FIELDS (type) = (struct field *) | |
1ab3bf1b | 1818 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct field) * nfields); |
84ce6717 FF |
1819 | /* Copy the saved-up fields into the field vector. */ |
1820 | for (n = 0; (n < nfields) && (list != NULL); list = list -> next) | |
1821 | { | |
1822 | TYPE_FIELD (type, n++) = list -> field; | |
1823 | } | |
1824 | } | |
35f5886e | 1825 | } |
35f5886e FF |
1826 | return (type); |
1827 | } | |
1828 | ||
1829 | /* | |
1830 | ||
1831 | LOCAL FUNCTION | |
1832 | ||
1833 | read_func_scope -- process all dies within a function scope | |
1834 | ||
35f5886e FF |
1835 | DESCRIPTION |
1836 | ||
1837 | Process all dies within a given function scope. We are passed | |
1838 | a die information structure pointer DIP for the die which | |
1839 | starts the function scope, and pointers into the raw die data | |
1840 | that define the dies within the function scope. | |
1841 | ||
1842 | For now, we ignore lexical block scopes within the function. | |
1843 | The problem is that AT&T cc does not define a DWARF lexical | |
1844 | block scope for the function itself, while gcc defines a | |
1845 | lexical block scope for the function. We need to think about | |
1846 | how to handle this difference, or if it is even a problem. | |
1847 | (FIXME) | |
1848 | */ | |
1849 | ||
1850 | static void | |
1ab3bf1b JG |
1851 | read_func_scope (dip, thisdie, enddie, objfile) |
1852 | struct dieinfo *dip; | |
1853 | char *thisdie; | |
1854 | char *enddie; | |
1855 | struct objfile *objfile; | |
35f5886e | 1856 | { |
4d315a07 | 1857 | register struct context_stack *new; |
35f5886e | 1858 | |
5e2e79f8 FF |
1859 | if (objfile -> ei.entry_point >= dip -> at_low_pc && |
1860 | objfile -> ei.entry_point < dip -> at_high_pc) | |
35f5886e | 1861 | { |
5e2e79f8 FF |
1862 | objfile -> ei.entry_func_lowpc = dip -> at_low_pc; |
1863 | objfile -> ei.entry_func_highpc = dip -> at_high_pc; | |
35f5886e | 1864 | } |
4d315a07 | 1865 | if (STREQ (dip -> at_name, "main")) /* FIXME: hardwired name */ |
35f5886e | 1866 | { |
5e2e79f8 FF |
1867 | objfile -> ei.main_func_lowpc = dip -> at_low_pc; |
1868 | objfile -> ei.main_func_highpc = dip -> at_high_pc; | |
35f5886e | 1869 | } |
4d315a07 | 1870 | new = push_context (0, dip -> at_low_pc); |
1ab3bf1b | 1871 | new -> name = new_symbol (dip, objfile); |
4d315a07 | 1872 | list_in_scope = &local_symbols; |
13b5a7ff | 1873 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 FF |
1874 | new = pop_context (); |
1875 | /* Make a block for the local symbols within. */ | |
1876 | finish_block (new -> name, &local_symbols, new -> old_blocks, | |
1ab3bf1b | 1877 | new -> start_addr, dip -> at_high_pc, objfile); |
4d315a07 | 1878 | list_in_scope = &file_symbols; |
35f5886e FF |
1879 | } |
1880 | ||
2dbde378 FF |
1881 | |
1882 | /* | |
1883 | ||
1884 | LOCAL FUNCTION | |
1885 | ||
1886 | handle_producer -- process the AT_producer attribute | |
1887 | ||
1888 | DESCRIPTION | |
1889 | ||
1890 | Perform any operations that depend on finding a particular | |
1891 | AT_producer attribute. | |
1892 | ||
1893 | */ | |
1894 | ||
1895 | static void | |
1896 | handle_producer (producer) | |
1897 | char *producer; | |
1898 | { | |
1899 | ||
1900 | /* If this compilation unit was compiled with g++ or gcc, then set the | |
1901 | processing_gcc_compilation flag. */ | |
1902 | ||
1903 | processing_gcc_compilation = | |
1904 | STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER)) | |
93bb6e65 FF |
1905 | /* start-sanitize-chill */ |
1906 | || STREQN (producer, CHILL_PRODUCER, strlen (CHILL_PRODUCER)) | |
1907 | /* end-sanitize-chill */ | |
2dbde378 FF |
1908 | || STREQN (producer, GCC_PRODUCER, strlen (GCC_PRODUCER)); |
1909 | ||
1910 | /* Select a demangling style if we can identify the producer and if | |
1911 | the current style is auto. We leave the current style alone if it | |
1912 | is not auto. We also leave the demangling style alone if we find a | |
1913 | gcc (cc1) producer, as opposed to a g++ (cc1plus) producer. */ | |
1914 | ||
3dc755fb | 1915 | if (AUTO_DEMANGLING) |
2dbde378 FF |
1916 | { |
1917 | if (STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER))) | |
1918 | { | |
1919 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); | |
1920 | } | |
1921 | else if (STREQN (producer, LCC_PRODUCER, strlen (LCC_PRODUCER))) | |
1922 | { | |
1923 | set_demangling_style (LUCID_DEMANGLING_STYLE_STRING); | |
1924 | } | |
2dbde378 | 1925 | } |
2dbde378 FF |
1926 | } |
1927 | ||
1928 | ||
35f5886e FF |
1929 | /* |
1930 | ||
1931 | LOCAL FUNCTION | |
1932 | ||
1933 | read_file_scope -- process all dies within a file scope | |
1934 | ||
35f5886e FF |
1935 | DESCRIPTION |
1936 | ||
1937 | Process all dies within a given file scope. We are passed a | |
1938 | pointer to the die information structure for the die which | |
1939 | starts the file scope, and pointers into the raw die data which | |
1940 | mark the range of dies within the file scope. | |
1941 | ||
1942 | When the partial symbol table is built, the file offset for the line | |
1943 | number table for each compilation unit is saved in the partial symbol | |
1944 | table entry for that compilation unit. As the symbols for each | |
1945 | compilation unit are read, the line number table is read into memory | |
1946 | and the variable lnbase is set to point to it. Thus all we have to | |
1947 | do is use lnbase to access the line number table for the current | |
1948 | compilation unit. | |
1949 | */ | |
1950 | ||
1951 | static void | |
1ab3bf1b JG |
1952 | read_file_scope (dip, thisdie, enddie, objfile) |
1953 | struct dieinfo *dip; | |
1954 | char *thisdie; | |
1955 | char *enddie; | |
1956 | struct objfile *objfile; | |
35f5886e FF |
1957 | { |
1958 | struct cleanup *back_to; | |
4d315a07 | 1959 | struct symtab *symtab; |
35f5886e | 1960 | |
5e2e79f8 FF |
1961 | if (objfile -> ei.entry_point >= dip -> at_low_pc && |
1962 | objfile -> ei.entry_point < dip -> at_high_pc) | |
35f5886e | 1963 | { |
5e2e79f8 FF |
1964 | objfile -> ei.entry_file_lowpc = dip -> at_low_pc; |
1965 | objfile -> ei.entry_file_highpc = dip -> at_high_pc; | |
35f5886e | 1966 | } |
95ff889e | 1967 | set_cu_language (dip); |
4d315a07 FF |
1968 | if (dip -> at_producer != NULL) |
1969 | { | |
2dbde378 | 1970 | handle_producer (dip -> at_producer); |
4d315a07 | 1971 | } |
35f5886e FF |
1972 | numutypes = (enddie - thisdie) / 4; |
1973 | utypes = (struct type **) xmalloc (numutypes * sizeof (struct type *)); | |
1974 | back_to = make_cleanup (free, utypes); | |
4ed3a9ea | 1975 | memset (utypes, 0, numutypes * sizeof (struct type *)); |
bf229b4e | 1976 | memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *)); |
d4902ab0 | 1977 | start_symtab (dip -> at_name, dip -> at_comp_dir, dip -> at_low_pc); |
35f5886e | 1978 | decode_line_numbers (lnbase); |
13b5a7ff | 1979 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 | 1980 | symtab = end_symtab (dip -> at_high_pc, 0, 0, objfile); |
7b5d9650 | 1981 | if (symtab != NULL) |
4d315a07 | 1982 | { |
95ff889e | 1983 | symtab -> language = cu_language; |
7b5d9650 | 1984 | } |
35f5886e FF |
1985 | do_cleanups (back_to); |
1986 | utypes = NULL; | |
1987 | numutypes = 0; | |
1988 | } | |
1989 | ||
1990 | /* | |
1991 | ||
35f5886e FF |
1992 | LOCAL FUNCTION |
1993 | ||
1994 | process_dies -- process a range of DWARF Information Entries | |
1995 | ||
1996 | SYNOPSIS | |
1997 | ||
8b5b6fae FF |
1998 | static void process_dies (char *thisdie, char *enddie, |
1999 | struct objfile *objfile) | |
35f5886e FF |
2000 | |
2001 | DESCRIPTION | |
2002 | ||
2003 | Process all DIE's in a specified range. May be (and almost | |
2004 | certainly will be) called recursively. | |
2005 | */ | |
2006 | ||
2007 | static void | |
1ab3bf1b JG |
2008 | process_dies (thisdie, enddie, objfile) |
2009 | char *thisdie; | |
2010 | char *enddie; | |
2011 | struct objfile *objfile; | |
35f5886e FF |
2012 | { |
2013 | char *nextdie; | |
2014 | struct dieinfo di; | |
2015 | ||
2016 | while (thisdie < enddie) | |
2017 | { | |
95967e73 | 2018 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2019 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2020 | { |
2021 | break; | |
2022 | } | |
13b5a7ff | 2023 | else if (di.die_tag == TAG_padding) |
35f5886e | 2024 | { |
13b5a7ff | 2025 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2026 | } |
2027 | else | |
2028 | { | |
95967e73 | 2029 | completedieinfo (&di, objfile); |
35f5886e FF |
2030 | if (di.at_sibling != 0) |
2031 | { | |
2032 | nextdie = dbbase + di.at_sibling - dbroff; | |
2033 | } | |
2034 | else | |
2035 | { | |
13b5a7ff | 2036 | nextdie = thisdie + di.die_length; |
35f5886e | 2037 | } |
13b5a7ff | 2038 | switch (di.die_tag) |
35f5886e FF |
2039 | { |
2040 | case TAG_compile_unit: | |
a048c8f5 | 2041 | read_file_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2042 | break; |
2043 | case TAG_global_subroutine: | |
2044 | case TAG_subroutine: | |
2d6186f4 | 2045 | if (di.has_at_low_pc) |
35f5886e | 2046 | { |
a048c8f5 | 2047 | read_func_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2048 | } |
2049 | break; | |
2050 | case TAG_lexical_block: | |
a048c8f5 | 2051 | read_lexical_block_scope (&di, thisdie, nextdie, objfile); |
35f5886e | 2052 | break; |
95ff889e | 2053 | case TAG_class_type: |
35f5886e FF |
2054 | case TAG_structure_type: |
2055 | case TAG_union_type: | |
8b5b6fae | 2056 | read_structure_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2057 | break; |
2058 | case TAG_enumeration_type: | |
1ab3bf1b | 2059 | read_enumeration (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2060 | break; |
2061 | case TAG_subroutine_type: | |
2062 | read_subroutine_type (&di, thisdie, nextdie); | |
2063 | break; | |
2064 | case TAG_array_type: | |
4d315a07 | 2065 | dwarf_read_array_type (&di); |
35f5886e | 2066 | break; |
9e4c1921 FF |
2067 | case TAG_pointer_type: |
2068 | read_tag_pointer_type (&di); | |
2069 | break; | |
ec16f701 FF |
2070 | case TAG_string_type: |
2071 | read_tag_string_type (&di); | |
2072 | break; | |
35f5886e | 2073 | default: |
4ed3a9ea | 2074 | new_symbol (&di, objfile); |
35f5886e FF |
2075 | break; |
2076 | } | |
2077 | } | |
2078 | thisdie = nextdie; | |
2079 | } | |
2080 | } | |
2081 | ||
2082 | /* | |
2083 | ||
35f5886e FF |
2084 | LOCAL FUNCTION |
2085 | ||
2086 | decode_line_numbers -- decode a line number table fragment | |
2087 | ||
2088 | SYNOPSIS | |
2089 | ||
2090 | static void decode_line_numbers (char *tblscan, char *tblend, | |
2091 | long length, long base, long line, long pc) | |
2092 | ||
2093 | DESCRIPTION | |
2094 | ||
2095 | Translate the DWARF line number information to gdb form. | |
2096 | ||
2097 | The ".line" section contains one or more line number tables, one for | |
2098 | each ".line" section from the objects that were linked. | |
2099 | ||
2100 | The AT_stmt_list attribute for each TAG_source_file entry in the | |
2101 | ".debug" section contains the offset into the ".line" section for the | |
2102 | start of the table for that file. | |
2103 | ||
2104 | The table itself has the following structure: | |
2105 | ||
2106 | <table length><base address><source statement entry> | |
2107 | 4 bytes 4 bytes 10 bytes | |
2108 | ||
2109 | The table length is the total size of the table, including the 4 bytes | |
2110 | for the length information. | |
2111 | ||
2112 | The base address is the address of the first instruction generated | |
2113 | for the source file. | |
2114 | ||
2115 | Each source statement entry has the following structure: | |
2116 | ||
2117 | <line number><statement position><address delta> | |
2118 | 4 bytes 2 bytes 4 bytes | |
2119 | ||
2120 | The line number is relative to the start of the file, starting with | |
2121 | line 1. | |
2122 | ||
2123 | The statement position either -1 (0xFFFF) or the number of characters | |
2124 | from the beginning of the line to the beginning of the statement. | |
2125 | ||
2126 | The address delta is the difference between the base address and | |
2127 | the address of the first instruction for the statement. | |
2128 | ||
2129 | Note that we must copy the bytes from the packed table to our local | |
2130 | variables before attempting to use them, to avoid alignment problems | |
2131 | on some machines, particularly RISC processors. | |
2132 | ||
2133 | BUGS | |
2134 | ||
2135 | Does gdb expect the line numbers to be sorted? They are now by | |
2136 | chance/luck, but are not required to be. (FIXME) | |
2137 | ||
2138 | The line with number 0 is unused, gdb apparently can discover the | |
2139 | span of the last line some other way. How? (FIXME) | |
2140 | */ | |
2141 | ||
2142 | static void | |
1ab3bf1b JG |
2143 | decode_line_numbers (linetable) |
2144 | char *linetable; | |
35f5886e FF |
2145 | { |
2146 | char *tblscan; | |
2147 | char *tblend; | |
13b5a7ff FF |
2148 | unsigned long length; |
2149 | unsigned long base; | |
2150 | unsigned long line; | |
2151 | unsigned long pc; | |
35f5886e FF |
2152 | |
2153 | if (linetable != NULL) | |
2154 | { | |
2155 | tblscan = tblend = linetable; | |
13b5a7ff FF |
2156 | length = target_to_host (tblscan, SIZEOF_LINETBL_LENGTH, GET_UNSIGNED, |
2157 | current_objfile); | |
2158 | tblscan += SIZEOF_LINETBL_LENGTH; | |
35f5886e | 2159 | tblend += length; |
13b5a7ff FF |
2160 | base = target_to_host (tblscan, TARGET_FT_POINTER_SIZE (objfile), |
2161 | GET_UNSIGNED, current_objfile); | |
2162 | tblscan += TARGET_FT_POINTER_SIZE (objfile); | |
35f5886e | 2163 | base += baseaddr; |
35f5886e FF |
2164 | while (tblscan < tblend) |
2165 | { | |
13b5a7ff FF |
2166 | line = target_to_host (tblscan, SIZEOF_LINETBL_LINENO, GET_UNSIGNED, |
2167 | current_objfile); | |
2168 | tblscan += SIZEOF_LINETBL_LINENO + SIZEOF_LINETBL_STMT; | |
2169 | pc = target_to_host (tblscan, SIZEOF_LINETBL_DELTA, GET_UNSIGNED, | |
2170 | current_objfile); | |
2171 | tblscan += SIZEOF_LINETBL_DELTA; | |
35f5886e | 2172 | pc += base; |
13b5a7ff | 2173 | if (line != 0) |
35f5886e | 2174 | { |
4d315a07 | 2175 | record_line (current_subfile, line, pc); |
35f5886e FF |
2176 | } |
2177 | } | |
2178 | } | |
2179 | } | |
2180 | ||
2181 | /* | |
2182 | ||
35f5886e FF |
2183 | LOCAL FUNCTION |
2184 | ||
2185 | locval -- compute the value of a location attribute | |
2186 | ||
2187 | SYNOPSIS | |
2188 | ||
2189 | static int locval (char *loc) | |
2190 | ||
2191 | DESCRIPTION | |
2192 | ||
2193 | Given pointer to a string of bytes that define a location, compute | |
2194 | the location and return the value. | |
2195 | ||
2196 | When computing values involving the current value of the frame pointer, | |
2197 | the value zero is used, which results in a value relative to the frame | |
2198 | pointer, rather than the absolute value. This is what GDB wants | |
2199 | anyway. | |
2200 | ||
2201 | When the result is a register number, the global isreg flag is set, | |
2202 | otherwise it is cleared. This is a kludge until we figure out a better | |
2203 | way to handle the problem. Gdb's design does not mesh well with the | |
2204 | DWARF notion of a location computing interpreter, which is a shame | |
2205 | because the flexibility goes unused. | |
2206 | ||
2207 | NOTES | |
2208 | ||
2209 | Note that stack[0] is unused except as a default error return. | |
2210 | Note that stack overflow is not yet handled. | |
2211 | */ | |
2212 | ||
2213 | static int | |
1ab3bf1b JG |
2214 | locval (loc) |
2215 | char *loc; | |
35f5886e FF |
2216 | { |
2217 | unsigned short nbytes; | |
13b5a7ff FF |
2218 | unsigned short locsize; |
2219 | auto long stack[64]; | |
35f5886e FF |
2220 | int stacki; |
2221 | char *end; | |
2222 | long regno; | |
13b5a7ff FF |
2223 | int loc_atom_code; |
2224 | int loc_value_size; | |
35f5886e | 2225 | |
13b5a7ff FF |
2226 | nbytes = attribute_size (AT_location); |
2227 | locsize = target_to_host (loc, nbytes, GET_UNSIGNED, current_objfile); | |
2228 | loc += nbytes; | |
2229 | end = loc + locsize; | |
35f5886e FF |
2230 | stacki = 0; |
2231 | stack[stacki] = 0; | |
2232 | isreg = 0; | |
a5bd5ba6 | 2233 | offreg = 0; |
13b5a7ff FF |
2234 | loc_value_size = TARGET_FT_LONG_SIZE (current_objfile); |
2235 | while (loc < end) | |
35f5886e | 2236 | { |
13b5a7ff FF |
2237 | loc_atom_code = target_to_host (loc, SIZEOF_LOC_ATOM_CODE, GET_UNSIGNED, |
2238 | current_objfile); | |
2239 | loc += SIZEOF_LOC_ATOM_CODE; | |
2240 | switch (loc_atom_code) | |
2241 | { | |
2242 | case 0: | |
2243 | /* error */ | |
2244 | loc = end; | |
2245 | break; | |
2246 | case OP_REG: | |
2247 | /* push register (number) */ | |
2248 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2249 | GET_UNSIGNED, current_objfile); | |
2250 | loc += loc_value_size; | |
2251 | isreg = 1; | |
2252 | break; | |
2253 | case OP_BASEREG: | |
2254 | /* push value of register (number) */ | |
2255 | /* Actually, we compute the value as if register has 0 */ | |
2256 | offreg = 1; | |
2257 | regno = target_to_host (loc, loc_value_size, GET_UNSIGNED, | |
2258 | current_objfile); | |
2259 | loc += loc_value_size; | |
2260 | if (regno == R_FP) | |
2261 | { | |
2262 | stack[++stacki] = 0; | |
2263 | } | |
2264 | else | |
2265 | { | |
2266 | stack[++stacki] = 0; | |
51b80b00 FF |
2267 | |
2268 | complain (&basereg_not_handled, DIE_ID, DIE_NAME, regno); | |
13b5a7ff FF |
2269 | } |
2270 | break; | |
2271 | case OP_ADDR: | |
2272 | /* push address (relocated address) */ | |
2273 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2274 | GET_UNSIGNED, current_objfile); | |
2275 | loc += loc_value_size; | |
2276 | break; | |
2277 | case OP_CONST: | |
2278 | /* push constant (number) FIXME: signed or unsigned! */ | |
2279 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2280 | GET_SIGNED, current_objfile); | |
2281 | loc += loc_value_size; | |
2282 | break; | |
2283 | case OP_DEREF2: | |
2284 | /* pop, deref and push 2 bytes (as a long) */ | |
51b80b00 | 2285 | complain (&op_deref2, DIE_ID, DIE_NAME, stack[stacki]); |
13b5a7ff FF |
2286 | break; |
2287 | case OP_DEREF4: /* pop, deref and push 4 bytes (as a long) */ | |
51b80b00 | 2288 | complain (&op_deref4, DIE_ID, DIE_NAME, stack[stacki]); |
13b5a7ff FF |
2289 | break; |
2290 | case OP_ADD: /* pop top 2 items, add, push result */ | |
2291 | stack[stacki - 1] += stack[stacki]; | |
2292 | stacki--; | |
2293 | break; | |
2294 | } | |
35f5886e FF |
2295 | } |
2296 | return (stack[stacki]); | |
2297 | } | |
2298 | ||
2299 | /* | |
2300 | ||
2301 | LOCAL FUNCTION | |
2302 | ||
2303 | read_ofile_symtab -- build a full symtab entry from chunk of DIE's | |
2304 | ||
2305 | SYNOPSIS | |
2306 | ||
a048c8f5 | 2307 | static struct symtab *read_ofile_symtab (struct partial_symtab *pst) |
35f5886e FF |
2308 | |
2309 | DESCRIPTION | |
2310 | ||
1ab3bf1b JG |
2311 | When expanding a partial symbol table entry to a full symbol table |
2312 | entry, this is the function that gets called to read in the symbols | |
2313 | for the compilation unit. | |
2314 | ||
2315 | Returns a pointer to the newly constructed symtab (which is now | |
2316 | the new first one on the objfile's symtab list). | |
35f5886e FF |
2317 | */ |
2318 | ||
2319 | static struct symtab * | |
1ab3bf1b JG |
2320 | read_ofile_symtab (pst) |
2321 | struct partial_symtab *pst; | |
35f5886e FF |
2322 | { |
2323 | struct cleanup *back_to; | |
13b5a7ff | 2324 | unsigned long lnsize; |
d5931d79 | 2325 | file_ptr foffset; |
1ab3bf1b | 2326 | bfd *abfd; |
13b5a7ff | 2327 | char lnsizedata[SIZEOF_LINETBL_LENGTH]; |
1ab3bf1b JG |
2328 | |
2329 | abfd = pst -> objfile -> obfd; | |
2330 | current_objfile = pst -> objfile; | |
2331 | ||
35f5886e FF |
2332 | /* Allocate a buffer for the entire chunk of DIE's for this compilation |
2333 | unit, seek to the location in the file, and read in all the DIE's. */ | |
2334 | ||
2335 | diecount = 0; | |
4090fe1c FF |
2336 | dbsize = DBLENGTH (pst); |
2337 | dbbase = xmalloc (dbsize); | |
35f5886e FF |
2338 | dbroff = DBROFF(pst); |
2339 | foffset = DBFOFF(pst) + dbroff; | |
2670f34d JG |
2340 | base_section_offsets = pst->section_offsets; |
2341 | baseaddr = ANOFFSET (pst->section_offsets, 0); | |
d5931d79 | 2342 | if (bfd_seek (abfd, foffset, L_SET) || |
4090fe1c | 2343 | (bfd_read (dbbase, dbsize, 1, abfd) != dbsize)) |
35f5886e FF |
2344 | { |
2345 | free (dbbase); | |
2346 | error ("can't read DWARF data"); | |
2347 | } | |
2348 | back_to = make_cleanup (free, dbbase); | |
2349 | ||
2350 | /* If there is a line number table associated with this compilation unit | |
13b5a7ff FF |
2351 | then read the size of this fragment in bytes, from the fragment itself. |
2352 | Allocate a buffer for the fragment and read it in for future | |
35f5886e FF |
2353 | processing. */ |
2354 | ||
2355 | lnbase = NULL; | |
2356 | if (LNFOFF (pst)) | |
2357 | { | |
d5931d79 | 2358 | if (bfd_seek (abfd, LNFOFF (pst), L_SET) || |
13b5a7ff FF |
2359 | (bfd_read ((PTR) lnsizedata, sizeof (lnsizedata), 1, abfd) != |
2360 | sizeof (lnsizedata))) | |
35f5886e FF |
2361 | { |
2362 | error ("can't read DWARF line number table size"); | |
2363 | } | |
13b5a7ff FF |
2364 | lnsize = target_to_host (lnsizedata, SIZEOF_LINETBL_LENGTH, |
2365 | GET_UNSIGNED, pst -> objfile); | |
35f5886e | 2366 | lnbase = xmalloc (lnsize); |
d5931d79 | 2367 | if (bfd_seek (abfd, LNFOFF (pst), L_SET) || |
a048c8f5 | 2368 | (bfd_read (lnbase, lnsize, 1, abfd) != lnsize)) |
35f5886e FF |
2369 | { |
2370 | free (lnbase); | |
2371 | error ("can't read DWARF line numbers"); | |
2372 | } | |
2373 | make_cleanup (free, lnbase); | |
2374 | } | |
2375 | ||
4090fe1c | 2376 | process_dies (dbbase, dbbase + dbsize, pst -> objfile); |
35f5886e | 2377 | do_cleanups (back_to); |
1ab3bf1b JG |
2378 | current_objfile = NULL; |
2379 | return (pst -> objfile -> symtabs); | |
35f5886e FF |
2380 | } |
2381 | ||
2382 | /* | |
2383 | ||
2384 | LOCAL FUNCTION | |
2385 | ||
2386 | psymtab_to_symtab_1 -- do grunt work for building a full symtab entry | |
2387 | ||
2388 | SYNOPSIS | |
2389 | ||
a048c8f5 | 2390 | static void psymtab_to_symtab_1 (struct partial_symtab *pst) |
35f5886e FF |
2391 | |
2392 | DESCRIPTION | |
2393 | ||
2394 | Called once for each partial symbol table entry that needs to be | |
2395 | expanded into a full symbol table entry. | |
2396 | ||
2397 | */ | |
2398 | ||
2399 | static void | |
1ab3bf1b JG |
2400 | psymtab_to_symtab_1 (pst) |
2401 | struct partial_symtab *pst; | |
35f5886e FF |
2402 | { |
2403 | int i; | |
d07734e3 | 2404 | struct cleanup *old_chain; |
35f5886e | 2405 | |
1ab3bf1b | 2406 | if (pst != NULL) |
35f5886e | 2407 | { |
1ab3bf1b | 2408 | if (pst->readin) |
35f5886e | 2409 | { |
318bf84f | 2410 | warning ("psymtab for %s already read in. Shouldn't happen.", |
1ab3bf1b JG |
2411 | pst -> filename); |
2412 | } | |
2413 | else | |
2414 | { | |
2415 | /* Read in all partial symtabs on which this one is dependent */ | |
2416 | for (i = 0; i < pst -> number_of_dependencies; i++) | |
2417 | { | |
2418 | if (!pst -> dependencies[i] -> readin) | |
2419 | { | |
2420 | /* Inform about additional files that need to be read in. */ | |
2421 | if (info_verbose) | |
2422 | { | |
2423 | fputs_filtered (" ", stdout); | |
2424 | wrap_here (""); | |
2425 | fputs_filtered ("and ", stdout); | |
2426 | wrap_here (""); | |
2427 | printf_filtered ("%s...", | |
2428 | pst -> dependencies[i] -> filename); | |
2429 | wrap_here (""); | |
2430 | fflush (stdout); /* Flush output */ | |
2431 | } | |
2432 | psymtab_to_symtab_1 (pst -> dependencies[i]); | |
2433 | } | |
2434 | } | |
2435 | if (DBLENGTH (pst)) /* Otherwise it's a dummy */ | |
2436 | { | |
d07734e3 FF |
2437 | buildsym_init (); |
2438 | old_chain = make_cleanup (really_free_pendings, 0); | |
1ab3bf1b JG |
2439 | pst -> symtab = read_ofile_symtab (pst); |
2440 | if (info_verbose) | |
2441 | { | |
2442 | printf_filtered ("%d DIE's, sorting...", diecount); | |
2443 | wrap_here (""); | |
2444 | fflush (stdout); | |
2445 | } | |
2446 | sort_symtab_syms (pst -> symtab); | |
d07734e3 | 2447 | do_cleanups (old_chain); |
1ab3bf1b JG |
2448 | } |
2449 | pst -> readin = 1; | |
35f5886e | 2450 | } |
35f5886e | 2451 | } |
35f5886e FF |
2452 | } |
2453 | ||
2454 | /* | |
2455 | ||
2456 | LOCAL FUNCTION | |
2457 | ||
2458 | dwarf_psymtab_to_symtab -- build a full symtab entry from partial one | |
2459 | ||
2460 | SYNOPSIS | |
2461 | ||
2462 | static void dwarf_psymtab_to_symtab (struct partial_symtab *pst) | |
2463 | ||
2464 | DESCRIPTION | |
2465 | ||
2466 | This is the DWARF support entry point for building a full symbol | |
2467 | table entry from a partial symbol table entry. We are passed a | |
2468 | pointer to the partial symbol table entry that needs to be expanded. | |
2469 | ||
2470 | */ | |
2471 | ||
2472 | static void | |
1ab3bf1b JG |
2473 | dwarf_psymtab_to_symtab (pst) |
2474 | struct partial_symtab *pst; | |
35f5886e | 2475 | { |
7d9884b9 | 2476 | |
1ab3bf1b | 2477 | if (pst != NULL) |
35f5886e | 2478 | { |
1ab3bf1b | 2479 | if (pst -> readin) |
35f5886e | 2480 | { |
318bf84f | 2481 | warning ("psymtab for %s already read in. Shouldn't happen.", |
1ab3bf1b | 2482 | pst -> filename); |
35f5886e | 2483 | } |
1ab3bf1b | 2484 | else |
35f5886e | 2485 | { |
1ab3bf1b JG |
2486 | if (DBLENGTH (pst) || pst -> number_of_dependencies) |
2487 | { | |
2488 | /* Print the message now, before starting serious work, to avoid | |
2489 | disconcerting pauses. */ | |
2490 | if (info_verbose) | |
2491 | { | |
2492 | printf_filtered ("Reading in symbols for %s...", | |
2493 | pst -> filename); | |
2494 | fflush (stdout); | |
2495 | } | |
2496 | ||
2497 | psymtab_to_symtab_1 (pst); | |
2498 | ||
2499 | #if 0 /* FIXME: Check to see what dbxread is doing here and see if | |
2500 | we need to do an equivalent or is this something peculiar to | |
2501 | stabs/a.out format. | |
2502 | Match with global symbols. This only needs to be done once, | |
2503 | after all of the symtabs and dependencies have been read in. | |
2504 | */ | |
2505 | scan_file_globals (pst -> objfile); | |
2506 | #endif | |
2507 | ||
2508 | /* Finish up the verbose info message. */ | |
2509 | if (info_verbose) | |
2510 | { | |
2511 | printf_filtered ("done.\n"); | |
2512 | fflush (stdout); | |
2513 | } | |
2514 | } | |
35f5886e FF |
2515 | } |
2516 | } | |
2517 | } | |
2518 | ||
2519 | /* | |
2520 | ||
2521 | LOCAL FUNCTION | |
2522 | ||
2523 | init_psymbol_list -- initialize storage for partial symbols | |
2524 | ||
2525 | SYNOPSIS | |
2526 | ||
1ab3bf1b | 2527 | static void init_psymbol_list (struct objfile *objfile, int total_symbols) |
35f5886e FF |
2528 | |
2529 | DESCRIPTION | |
2530 | ||
2531 | Initializes storage for all of the partial symbols that will be | |
2532 | created by dwarf_build_psymtabs and subsidiaries. | |
2533 | */ | |
2534 | ||
2535 | static void | |
1ab3bf1b JG |
2536 | init_psymbol_list (objfile, total_symbols) |
2537 | struct objfile *objfile; | |
2538 | int total_symbols; | |
35f5886e FF |
2539 | { |
2540 | /* Free any previously allocated psymbol lists. */ | |
2541 | ||
1ab3bf1b | 2542 | if (objfile -> global_psymbols.list) |
35f5886e | 2543 | { |
84ffdec2 | 2544 | mfree (objfile -> md, (PTR)objfile -> global_psymbols.list); |
35f5886e | 2545 | } |
1ab3bf1b | 2546 | if (objfile -> static_psymbols.list) |
35f5886e | 2547 | { |
84ffdec2 | 2548 | mfree (objfile -> md, (PTR)objfile -> static_psymbols.list); |
35f5886e FF |
2549 | } |
2550 | ||
2551 | /* Current best guess is that there are approximately a twentieth | |
2552 | of the total symbols (in a debugging file) are global or static | |
2553 | oriented symbols */ | |
2554 | ||
1ab3bf1b JG |
2555 | objfile -> global_psymbols.size = total_symbols / 10; |
2556 | objfile -> static_psymbols.size = total_symbols / 10; | |
2557 | objfile -> global_psymbols.next = | |
2558 | objfile -> global_psymbols.list = (struct partial_symbol *) | |
318bf84f | 2559 | xmmalloc (objfile -> md, objfile -> global_psymbols.size |
1ab3bf1b JG |
2560 | * sizeof (struct partial_symbol)); |
2561 | objfile -> static_psymbols.next = | |
2562 | objfile -> static_psymbols.list = (struct partial_symbol *) | |
318bf84f | 2563 | xmmalloc (objfile -> md, objfile -> static_psymbols.size |
1ab3bf1b | 2564 | * sizeof (struct partial_symbol)); |
35f5886e FF |
2565 | } |
2566 | ||
35f5886e FF |
2567 | /* |
2568 | ||
715cafcb FF |
2569 | LOCAL FUNCTION |
2570 | ||
2571 | add_enum_psymbol -- add enumeration members to partial symbol table | |
2572 | ||
2573 | DESCRIPTION | |
2574 | ||
2575 | Given pointer to a DIE that is known to be for an enumeration, | |
2576 | extract the symbolic names of the enumeration members and add | |
2577 | partial symbols for them. | |
2578 | */ | |
2579 | ||
2580 | static void | |
1ab3bf1b JG |
2581 | add_enum_psymbol (dip, objfile) |
2582 | struct dieinfo *dip; | |
2583 | struct objfile *objfile; | |
715cafcb FF |
2584 | { |
2585 | char *scan; | |
2586 | char *listend; | |
13b5a7ff FF |
2587 | unsigned short blocksz; |
2588 | int nbytes; | |
715cafcb FF |
2589 | |
2590 | if ((scan = dip -> at_element_list) != NULL) | |
2591 | { | |
2592 | if (dip -> short_element_list) | |
2593 | { | |
13b5a7ff | 2594 | nbytes = attribute_size (AT_short_element_list); |
715cafcb FF |
2595 | } |
2596 | else | |
2597 | { | |
13b5a7ff | 2598 | nbytes = attribute_size (AT_element_list); |
715cafcb | 2599 | } |
13b5a7ff FF |
2600 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); |
2601 | scan += nbytes; | |
2602 | listend = scan + blocksz; | |
715cafcb FF |
2603 | while (scan < listend) |
2604 | { | |
13b5a7ff | 2605 | scan += TARGET_FT_LONG_SIZE (objfile); |
b440b1e9 | 2606 | ADD_PSYMBOL_TO_LIST (scan, strlen (scan), VAR_NAMESPACE, LOC_CONST, |
2e4964ad FF |
2607 | objfile -> static_psymbols, 0, cu_language, |
2608 | objfile); | |
715cafcb FF |
2609 | scan += strlen (scan) + 1; |
2610 | } | |
2611 | } | |
2612 | } | |
2613 | ||
2614 | /* | |
2615 | ||
35f5886e FF |
2616 | LOCAL FUNCTION |
2617 | ||
2618 | add_partial_symbol -- add symbol to partial symbol table | |
2619 | ||
2620 | DESCRIPTION | |
2621 | ||
2622 | Given a DIE, if it is one of the types that we want to | |
2623 | add to a partial symbol table, finish filling in the die info | |
2624 | and then add a partial symbol table entry for it. | |
2625 | ||
95ff889e FF |
2626 | NOTES |
2627 | ||
2628 | The caller must ensure that the DIE has a valid name attribute. | |
35f5886e FF |
2629 | */ |
2630 | ||
2631 | static void | |
1ab3bf1b JG |
2632 | add_partial_symbol (dip, objfile) |
2633 | struct dieinfo *dip; | |
2634 | struct objfile *objfile; | |
35f5886e | 2635 | { |
13b5a7ff | 2636 | switch (dip -> die_tag) |
35f5886e FF |
2637 | { |
2638 | case TAG_global_subroutine: | |
1ab3bf1b JG |
2639 | record_minimal_symbol (dip -> at_name, dip -> at_low_pc, mst_text, |
2640 | objfile); | |
b440b1e9 | 2641 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2642 | VAR_NAMESPACE, LOC_BLOCK, |
2643 | objfile -> global_psymbols, | |
2e4964ad | 2644 | dip -> at_low_pc, cu_language, objfile); |
35f5886e FF |
2645 | break; |
2646 | case TAG_global_variable: | |
1ab3bf1b JG |
2647 | record_minimal_symbol (dip -> at_name, locval (dip -> at_location), |
2648 | mst_data, objfile); | |
b440b1e9 | 2649 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2650 | VAR_NAMESPACE, LOC_STATIC, |
2651 | objfile -> global_psymbols, | |
2e4964ad | 2652 | 0, cu_language, objfile); |
35f5886e FF |
2653 | break; |
2654 | case TAG_subroutine: | |
b440b1e9 | 2655 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2656 | VAR_NAMESPACE, LOC_BLOCK, |
2657 | objfile -> static_psymbols, | |
2e4964ad | 2658 | dip -> at_low_pc, cu_language, objfile); |
35f5886e FF |
2659 | break; |
2660 | case TAG_local_variable: | |
b440b1e9 | 2661 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2662 | VAR_NAMESPACE, LOC_STATIC, |
2663 | objfile -> static_psymbols, | |
2e4964ad | 2664 | 0, cu_language, objfile); |
35f5886e FF |
2665 | break; |
2666 | case TAG_typedef: | |
b440b1e9 | 2667 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2668 | VAR_NAMESPACE, LOC_TYPEDEF, |
2669 | objfile -> static_psymbols, | |
2e4964ad | 2670 | 0, cu_language, objfile); |
35f5886e | 2671 | break; |
95ff889e | 2672 | case TAG_class_type: |
35f5886e FF |
2673 | case TAG_structure_type: |
2674 | case TAG_union_type: | |
95ff889e | 2675 | case TAG_enumeration_type: |
b440b1e9 | 2676 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2677 | STRUCT_NAMESPACE, LOC_TYPEDEF, |
2678 | objfile -> static_psymbols, | |
2e4964ad | 2679 | 0, cu_language, objfile); |
95ff889e | 2680 | if (cu_language == language_cplus) |
715cafcb | 2681 | { |
95ff889e | 2682 | /* For C++, these implicitly act as typedefs as well. */ |
b440b1e9 | 2683 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
95ff889e | 2684 | VAR_NAMESPACE, LOC_TYPEDEF, |
1ab3bf1b | 2685 | objfile -> static_psymbols, |
2e4964ad | 2686 | 0, cu_language, objfile); |
715cafcb | 2687 | } |
715cafcb | 2688 | break; |
35f5886e FF |
2689 | } |
2690 | } | |
2691 | ||
2692 | /* | |
2693 | ||
2694 | LOCAL FUNCTION | |
2695 | ||
2696 | scan_partial_symbols -- scan DIE's within a single compilation unit | |
2697 | ||
2698 | DESCRIPTION | |
2699 | ||
2700 | Process the DIE's within a single compilation unit, looking for | |
2701 | interesting DIE's that contribute to the partial symbol table entry | |
a679650f | 2702 | for this compilation unit. |
35f5886e | 2703 | |
2d6186f4 FF |
2704 | NOTES |
2705 | ||
a679650f FF |
2706 | There are some DIE's that may appear both at file scope and within |
2707 | the scope of a function. We are only interested in the ones at file | |
2708 | scope, and the only way to tell them apart is to keep track of the | |
2709 | scope. For example, consider the test case: | |
2710 | ||
2711 | static int i; | |
2712 | main () { int j; } | |
2713 | ||
2714 | for which the relevant DWARF segment has the structure: | |
2715 | ||
2716 | 0x51: | |
2717 | 0x23 global subrtn sibling 0x9b | |
2718 | name main | |
2719 | fund_type FT_integer | |
2720 | low_pc 0x800004cc | |
2721 | high_pc 0x800004d4 | |
2722 | ||
2723 | 0x74: | |
2724 | 0x23 local var sibling 0x97 | |
2725 | name j | |
2726 | fund_type FT_integer | |
2727 | location OP_BASEREG 0xe | |
2728 | OP_CONST 0xfffffffc | |
2729 | OP_ADD | |
2730 | 0x97: | |
2731 | 0x4 | |
2732 | ||
2733 | 0x9b: | |
2734 | 0x1d local var sibling 0xb8 | |
2735 | name i | |
2736 | fund_type FT_integer | |
2737 | location OP_ADDR 0x800025dc | |
2738 | ||
2739 | 0xb8: | |
2740 | 0x4 | |
2741 | ||
2742 | We want to include the symbol 'i' in the partial symbol table, but | |
2743 | not the symbol 'j'. In essence, we want to skip all the dies within | |
2744 | the scope of a TAG_global_subroutine DIE. | |
2745 | ||
715cafcb FF |
2746 | Don't attempt to add anonymous structures or unions since they have |
2747 | no name. Anonymous enumerations however are processed, because we | |
2748 | want to extract their member names (the check for a tag name is | |
2749 | done later). | |
2d6186f4 | 2750 | |
715cafcb FF |
2751 | Also, for variables and subroutines, check that this is the place |
2752 | where the actual definition occurs, rather than just a reference | |
2753 | to an external. | |
35f5886e FF |
2754 | */ |
2755 | ||
2756 | static void | |
1ab3bf1b JG |
2757 | scan_partial_symbols (thisdie, enddie, objfile) |
2758 | char *thisdie; | |
2759 | char *enddie; | |
2760 | struct objfile *objfile; | |
35f5886e FF |
2761 | { |
2762 | char *nextdie; | |
a679650f | 2763 | char *temp; |
35f5886e FF |
2764 | struct dieinfo di; |
2765 | ||
2766 | while (thisdie < enddie) | |
2767 | { | |
95967e73 | 2768 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2769 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2770 | { |
2771 | break; | |
2772 | } | |
2773 | else | |
2774 | { | |
13b5a7ff | 2775 | nextdie = thisdie + di.die_length; |
715cafcb FF |
2776 | /* To avoid getting complete die information for every die, we |
2777 | only do it (below) for the cases we are interested in. */ | |
13b5a7ff | 2778 | switch (di.die_tag) |
35f5886e FF |
2779 | { |
2780 | case TAG_global_subroutine: | |
35f5886e | 2781 | case TAG_subroutine: |
a679650f FF |
2782 | completedieinfo (&di, objfile); |
2783 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2784 | { | |
2785 | add_partial_symbol (&di, objfile); | |
2786 | /* If there is a sibling attribute, adjust the nextdie | |
2787 | pointer to skip the entire scope of the subroutine. | |
2788 | Apply some sanity checking to make sure we don't | |
2789 | overrun or underrun the range of remaining DIE's */ | |
2790 | if (di.at_sibling != 0) | |
2791 | { | |
2792 | temp = dbbase + di.at_sibling - dbroff; | |
2793 | if ((temp < thisdie) || (temp >= enddie)) | |
2794 | { | |
51b80b00 FF |
2795 | complain (&bad_die_ref, DIE_ID, DIE_NAME, |
2796 | di.at_sibling); | |
a679650f FF |
2797 | } |
2798 | else | |
2799 | { | |
2800 | nextdie = temp; | |
2801 | } | |
2802 | } | |
2803 | } | |
2804 | break; | |
2d6186f4 | 2805 | case TAG_global_variable: |
35f5886e | 2806 | case TAG_local_variable: |
95967e73 | 2807 | completedieinfo (&di, objfile); |
2d6186f4 FF |
2808 | if (di.at_name && (di.has_at_low_pc || di.at_location)) |
2809 | { | |
1ab3bf1b | 2810 | add_partial_symbol (&di, objfile); |
2d6186f4 FF |
2811 | } |
2812 | break; | |
35f5886e | 2813 | case TAG_typedef: |
95ff889e | 2814 | case TAG_class_type: |
35f5886e FF |
2815 | case TAG_structure_type: |
2816 | case TAG_union_type: | |
95967e73 | 2817 | completedieinfo (&di, objfile); |
2d6186f4 | 2818 | if (di.at_name) |
35f5886e | 2819 | { |
1ab3bf1b | 2820 | add_partial_symbol (&di, objfile); |
35f5886e FF |
2821 | } |
2822 | break; | |
715cafcb | 2823 | case TAG_enumeration_type: |
95967e73 | 2824 | completedieinfo (&di, objfile); |
95ff889e FF |
2825 | if (di.at_name) |
2826 | { | |
2827 | add_partial_symbol (&di, objfile); | |
2828 | } | |
2829 | add_enum_psymbol (&di, objfile); | |
715cafcb | 2830 | break; |
35f5886e FF |
2831 | } |
2832 | } | |
2833 | thisdie = nextdie; | |
2834 | } | |
2835 | } | |
2836 | ||
2837 | /* | |
2838 | ||
2839 | LOCAL FUNCTION | |
2840 | ||
2841 | scan_compilation_units -- build a psymtab entry for each compilation | |
2842 | ||
2843 | DESCRIPTION | |
2844 | ||
2845 | This is the top level dwarf parsing routine for building partial | |
2846 | symbol tables. | |
2847 | ||
2848 | It scans from the beginning of the DWARF table looking for the first | |
2849 | TAG_compile_unit DIE, and then follows the sibling chain to locate | |
2850 | each additional TAG_compile_unit DIE. | |
2851 | ||
2852 | For each TAG_compile_unit DIE it creates a partial symtab structure, | |
2853 | calls a subordinate routine to collect all the compilation unit's | |
2854 | global DIE's, file scope DIEs, typedef DIEs, etc, and then links the | |
2855 | new partial symtab structure into the partial symbol table. It also | |
2856 | records the appropriate information in the partial symbol table entry | |
2857 | to allow the chunk of DIE's and line number table for this compilation | |
2858 | unit to be located and re-read later, to generate a complete symbol | |
2859 | table entry for the compilation unit. | |
2860 | ||
2861 | Thus it effectively partitions up a chunk of DIE's for multiple | |
2862 | compilation units into smaller DIE chunks and line number tables, | |
2863 | and associates them with a partial symbol table entry. | |
2864 | ||
2865 | NOTES | |
2866 | ||
2867 | If any compilation unit has no line number table associated with | |
2868 | it for some reason (a missing at_stmt_list attribute, rather than | |
2869 | just one with a value of zero, which is valid) then we ensure that | |
2870 | the recorded file offset is zero so that the routine which later | |
2871 | reads line number table fragments knows that there is no fragment | |
2872 | to read. | |
2873 | ||
2874 | RETURNS | |
2875 | ||
2876 | Returns no value. | |
2877 | ||
2878 | */ | |
2879 | ||
2880 | static void | |
d5931d79 | 2881 | scan_compilation_units (thisdie, enddie, dbfoff, lnoffset, objfile) |
1ab3bf1b JG |
2882 | char *thisdie; |
2883 | char *enddie; | |
d5931d79 JG |
2884 | file_ptr dbfoff; |
2885 | file_ptr lnoffset; | |
1ab3bf1b | 2886 | struct objfile *objfile; |
35f5886e FF |
2887 | { |
2888 | char *nextdie; | |
2889 | struct dieinfo di; | |
2890 | struct partial_symtab *pst; | |
2891 | int culength; | |
2892 | int curoff; | |
d5931d79 | 2893 | file_ptr curlnoffset; |
35f5886e FF |
2894 | |
2895 | while (thisdie < enddie) | |
2896 | { | |
95967e73 | 2897 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2898 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2899 | { |
2900 | break; | |
2901 | } | |
13b5a7ff | 2902 | else if (di.die_tag != TAG_compile_unit) |
35f5886e | 2903 | { |
13b5a7ff | 2904 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2905 | } |
2906 | else | |
2907 | { | |
95967e73 | 2908 | completedieinfo (&di, objfile); |
95ff889e | 2909 | set_cu_language (&di); |
35f5886e FF |
2910 | if (di.at_sibling != 0) |
2911 | { | |
2912 | nextdie = dbbase + di.at_sibling - dbroff; | |
2913 | } | |
2914 | else | |
2915 | { | |
13b5a7ff | 2916 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2917 | } |
2918 | curoff = thisdie - dbbase; | |
2919 | culength = nextdie - thisdie; | |
2d6186f4 | 2920 | curlnoffset = di.has_at_stmt_list ? lnoffset + di.at_stmt_list : 0; |
1ab3bf1b JG |
2921 | |
2922 | /* First allocate a new partial symbol table structure */ | |
2923 | ||
95ff889e FF |
2924 | pst = start_psymtab_common (objfile, base_section_offsets, |
2925 | di.at_name, di.at_low_pc, | |
1ab3bf1b JG |
2926 | objfile -> global_psymbols.next, |
2927 | objfile -> static_psymbols.next); | |
2928 | ||
2929 | pst -> texthigh = di.at_high_pc; | |
2930 | pst -> read_symtab_private = (char *) | |
2931 | obstack_alloc (&objfile -> psymbol_obstack, | |
2932 | sizeof (struct dwfinfo)); | |
2933 | DBFOFF (pst) = dbfoff; | |
2934 | DBROFF (pst) = curoff; | |
2935 | DBLENGTH (pst) = culength; | |
2936 | LNFOFF (pst) = curlnoffset; | |
2937 | pst -> read_symtab = dwarf_psymtab_to_symtab; | |
2938 | ||
2939 | /* Now look for partial symbols */ | |
2940 | ||
13b5a7ff | 2941 | scan_partial_symbols (thisdie + di.die_length, nextdie, objfile); |
1ab3bf1b JG |
2942 | |
2943 | pst -> n_global_syms = objfile -> global_psymbols.next - | |
2944 | (objfile -> global_psymbols.list + pst -> globals_offset); | |
2945 | pst -> n_static_syms = objfile -> static_psymbols.next - | |
2946 | (objfile -> static_psymbols.list + pst -> statics_offset); | |
2947 | sort_pst_symbols (pst); | |
35f5886e FF |
2948 | /* If there is already a psymtab or symtab for a file of this name, |
2949 | remove it. (If there is a symtab, more drastic things also | |
2950 | happen.) This happens in VxWorks. */ | |
2951 | free_named_symtabs (pst -> filename); | |
35f5886e FF |
2952 | } |
2953 | thisdie = nextdie; | |
2954 | } | |
2955 | } | |
2956 | ||
2957 | /* | |
2958 | ||
2959 | LOCAL FUNCTION | |
2960 | ||
2961 | new_symbol -- make a symbol table entry for a new symbol | |
2962 | ||
2963 | SYNOPSIS | |
2964 | ||
1ab3bf1b JG |
2965 | static struct symbol *new_symbol (struct dieinfo *dip, |
2966 | struct objfile *objfile) | |
35f5886e FF |
2967 | |
2968 | DESCRIPTION | |
2969 | ||
2970 | Given a pointer to a DWARF information entry, figure out if we need | |
2971 | to make a symbol table entry for it, and if so, create a new entry | |
2972 | and return a pointer to it. | |
2973 | */ | |
2974 | ||
2975 | static struct symbol * | |
1ab3bf1b JG |
2976 | new_symbol (dip, objfile) |
2977 | struct dieinfo *dip; | |
2978 | struct objfile *objfile; | |
35f5886e FF |
2979 | { |
2980 | struct symbol *sym = NULL; | |
2981 | ||
2982 | if (dip -> at_name != NULL) | |
2983 | { | |
1ab3bf1b | 2984 | sym = (struct symbol *) obstack_alloc (&objfile -> symbol_obstack, |
35f5886e | 2985 | sizeof (struct symbol)); |
4ed3a9ea | 2986 | memset (sym, 0, sizeof (struct symbol)); |
95ff889e FF |
2987 | SYMBOL_NAME (sym) = create_name (dip -> at_name, |
2988 | &objfile->symbol_obstack); | |
35f5886e FF |
2989 | /* default assumptions */ |
2990 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2991 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2992 | SYMBOL_TYPE (sym) = decode_die_type (dip); | |
2e4964ad FF |
2993 | |
2994 | /* If this symbol is from a C++ compilation, then attempt to cache the | |
2995 | demangled form for future reference. This is a typical time versus | |
2996 | space tradeoff, that was decided in favor of time because it sped up | |
2997 | C++ symbol lookups by a factor of about 20. */ | |
2998 | ||
2999 | SYMBOL_LANGUAGE (sym) = cu_language; | |
7532cf10 | 3000 | SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile -> symbol_obstack); |
13b5a7ff | 3001 | switch (dip -> die_tag) |
35f5886e FF |
3002 | { |
3003 | case TAG_label: | |
4d315a07 | 3004 | SYMBOL_VALUE (sym) = dip -> at_low_pc; |
35f5886e FF |
3005 | SYMBOL_CLASS (sym) = LOC_LABEL; |
3006 | break; | |
3007 | case TAG_global_subroutine: | |
3008 | case TAG_subroutine: | |
4d315a07 | 3009 | SYMBOL_VALUE (sym) = dip -> at_low_pc; |
35f5886e FF |
3010 | SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym)); |
3011 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
13b5a7ff | 3012 | if (dip -> die_tag == TAG_global_subroutine) |
35f5886e FF |
3013 | { |
3014 | add_symbol_to_list (sym, &global_symbols); | |
3015 | } | |
3016 | else | |
3017 | { | |
4d315a07 | 3018 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
3019 | } |
3020 | break; | |
3021 | case TAG_global_variable: | |
35f5886e FF |
3022 | if (dip -> at_location != NULL) |
3023 | { | |
3024 | SYMBOL_VALUE (sym) = locval (dip -> at_location); | |
35f5886e FF |
3025 | add_symbol_to_list (sym, &global_symbols); |
3026 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
3027 | SYMBOL_VALUE (sym) += baseaddr; | |
3028 | } | |
a5bd5ba6 FF |
3029 | break; |
3030 | case TAG_local_variable: | |
3031 | if (dip -> at_location != NULL) | |
35f5886e | 3032 | { |
a5bd5ba6 | 3033 | SYMBOL_VALUE (sym) = locval (dip -> at_location); |
4d315a07 | 3034 | add_symbol_to_list (sym, list_in_scope); |
a5bd5ba6 FF |
3035 | if (isreg) |
3036 | { | |
3037 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
3038 | } | |
3039 | else if (offreg) | |
35f5886e | 3040 | { |
a5bd5ba6 | 3041 | SYMBOL_CLASS (sym) = LOC_LOCAL; |
35f5886e FF |
3042 | } |
3043 | else | |
3044 | { | |
3045 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
3046 | SYMBOL_VALUE (sym) += baseaddr; | |
3047 | } | |
3048 | } | |
3049 | break; | |
3050 | case TAG_formal_parameter: | |
3051 | if (dip -> at_location != NULL) | |
3052 | { | |
3053 | SYMBOL_VALUE (sym) = locval (dip -> at_location); | |
3054 | } | |
4d315a07 | 3055 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
3056 | if (isreg) |
3057 | { | |
3058 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
3059 | } | |
3060 | else | |
3061 | { | |
3062 | SYMBOL_CLASS (sym) = LOC_ARG; | |
3063 | } | |
3064 | break; | |
3065 | case TAG_unspecified_parameters: | |
3066 | /* From varargs functions; gdb doesn't seem to have any interest in | |
3067 | this information, so just ignore it for now. (FIXME?) */ | |
3068 | break; | |
95ff889e | 3069 | case TAG_class_type: |
35f5886e FF |
3070 | case TAG_structure_type: |
3071 | case TAG_union_type: | |
3072 | case TAG_enumeration_type: | |
3073 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3074 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
4d315a07 | 3075 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
3076 | break; |
3077 | case TAG_typedef: | |
3078 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3079 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
4d315a07 | 3080 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
3081 | break; |
3082 | default: | |
3083 | /* Not a tag we recognize. Hopefully we aren't processing trash | |
3084 | data, but since we must specifically ignore things we don't | |
3085 | recognize, there is nothing else we should do at this point. */ | |
3086 | break; | |
3087 | } | |
3088 | } | |
3089 | return (sym); | |
3090 | } | |
3091 | ||
3092 | /* | |
3093 | ||
95ff889e FF |
3094 | LOCAL FUNCTION |
3095 | ||
3096 | synthesize_typedef -- make a symbol table entry for a "fake" typedef | |
3097 | ||
3098 | SYNOPSIS | |
3099 | ||
3100 | static void synthesize_typedef (struct dieinfo *dip, | |
3101 | struct objfile *objfile, | |
3102 | struct type *type); | |
3103 | ||
3104 | DESCRIPTION | |
3105 | ||
3106 | Given a pointer to a DWARF information entry, synthesize a typedef | |
3107 | for the name in the DIE, using the specified type. | |
3108 | ||
3109 | This is used for C++ class, structs, unions, and enumerations to | |
3110 | set up the tag name as a type. | |
3111 | ||
3112 | */ | |
3113 | ||
3114 | static void | |
3115 | synthesize_typedef (dip, objfile, type) | |
3116 | struct dieinfo *dip; | |
3117 | struct objfile *objfile; | |
3118 | struct type *type; | |
3119 | { | |
3120 | struct symbol *sym = NULL; | |
3121 | ||
3122 | if (dip -> at_name != NULL) | |
3123 | { | |
3124 | sym = (struct symbol *) | |
3125 | obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symbol)); | |
3126 | memset (sym, 0, sizeof (struct symbol)); | |
3127 | SYMBOL_NAME (sym) = create_name (dip -> at_name, | |
3128 | &objfile->symbol_obstack); | |
7532cf10 | 3129 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); |
95ff889e FF |
3130 | SYMBOL_TYPE (sym) = type; |
3131 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3132 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
3133 | add_symbol_to_list (sym, list_in_scope); | |
3134 | } | |
3135 | } | |
3136 | ||
3137 | /* | |
3138 | ||
35f5886e FF |
3139 | LOCAL FUNCTION |
3140 | ||
3141 | decode_mod_fund_type -- decode a modified fundamental type | |
3142 | ||
3143 | SYNOPSIS | |
3144 | ||
3145 | static struct type *decode_mod_fund_type (char *typedata) | |
3146 | ||
3147 | DESCRIPTION | |
3148 | ||
3149 | Decode a block of data containing a modified fundamental | |
3150 | type specification. TYPEDATA is a pointer to the block, | |
13b5a7ff FF |
3151 | which starts with a length containing the size of the rest |
3152 | of the block. At the end of the block is a fundmental type | |
3153 | code value that gives the fundamental type. Everything | |
35f5886e FF |
3154 | in between are type modifiers. |
3155 | ||
3156 | We simply compute the number of modifiers and call the general | |
3157 | function decode_modified_type to do the actual work. | |
3158 | */ | |
3159 | ||
3160 | static struct type * | |
1ab3bf1b JG |
3161 | decode_mod_fund_type (typedata) |
3162 | char *typedata; | |
35f5886e FF |
3163 | { |
3164 | struct type *typep = NULL; | |
3165 | unsigned short modcount; | |
13b5a7ff | 3166 | int nbytes; |
35f5886e FF |
3167 | |
3168 | /* Get the total size of the block, exclusive of the size itself */ | |
13b5a7ff FF |
3169 | |
3170 | nbytes = attribute_size (AT_mod_fund_type); | |
3171 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3172 | typedata += nbytes; | |
3173 | ||
35f5886e | 3174 | /* Deduct the size of the fundamental type bytes at the end of the block. */ |
13b5a7ff FF |
3175 | |
3176 | modcount -= attribute_size (AT_fund_type); | |
3177 | ||
35f5886e | 3178 | /* Now do the actual decoding */ |
13b5a7ff FF |
3179 | |
3180 | typep = decode_modified_type (typedata, modcount, AT_mod_fund_type); | |
35f5886e FF |
3181 | return (typep); |
3182 | } | |
3183 | ||
3184 | /* | |
3185 | ||
3186 | LOCAL FUNCTION | |
3187 | ||
3188 | decode_mod_u_d_type -- decode a modified user defined type | |
3189 | ||
3190 | SYNOPSIS | |
3191 | ||
3192 | static struct type *decode_mod_u_d_type (char *typedata) | |
3193 | ||
3194 | DESCRIPTION | |
3195 | ||
3196 | Decode a block of data containing a modified user defined | |
3197 | type specification. TYPEDATA is a pointer to the block, | |
3198 | which consists of a two byte length, containing the size | |
3199 | of the rest of the block. At the end of the block is a | |
3200 | four byte value that gives a reference to a user defined type. | |
3201 | Everything in between are type modifiers. | |
3202 | ||
3203 | We simply compute the number of modifiers and call the general | |
3204 | function decode_modified_type to do the actual work. | |
3205 | */ | |
3206 | ||
3207 | static struct type * | |
1ab3bf1b JG |
3208 | decode_mod_u_d_type (typedata) |
3209 | char *typedata; | |
35f5886e FF |
3210 | { |
3211 | struct type *typep = NULL; | |
3212 | unsigned short modcount; | |
13b5a7ff | 3213 | int nbytes; |
35f5886e FF |
3214 | |
3215 | /* Get the total size of the block, exclusive of the size itself */ | |
13b5a7ff FF |
3216 | |
3217 | nbytes = attribute_size (AT_mod_u_d_type); | |
3218 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3219 | typedata += nbytes; | |
3220 | ||
35f5886e | 3221 | /* Deduct the size of the reference type bytes at the end of the block. */ |
13b5a7ff FF |
3222 | |
3223 | modcount -= attribute_size (AT_user_def_type); | |
3224 | ||
35f5886e | 3225 | /* Now do the actual decoding */ |
13b5a7ff FF |
3226 | |
3227 | typep = decode_modified_type (typedata, modcount, AT_mod_u_d_type); | |
35f5886e FF |
3228 | return (typep); |
3229 | } | |
3230 | ||
3231 | /* | |
3232 | ||
3233 | LOCAL FUNCTION | |
3234 | ||
3235 | decode_modified_type -- decode modified user or fundamental type | |
3236 | ||
3237 | SYNOPSIS | |
3238 | ||
1c92ca6f | 3239 | static struct type *decode_modified_type (char *modifiers, |
35f5886e FF |
3240 | unsigned short modcount, int mtype) |
3241 | ||
3242 | DESCRIPTION | |
3243 | ||
3244 | Decode a modified type, either a modified fundamental type or | |
3245 | a modified user defined type. MODIFIERS is a pointer to the | |
3246 | block of bytes that define MODCOUNT modifiers. Immediately | |
3247 | following the last modifier is a short containing the fundamental | |
3248 | type or a long containing the reference to the user defined | |
3249 | type. Which one is determined by MTYPE, which is either | |
3250 | AT_mod_fund_type or AT_mod_u_d_type to indicate what modified | |
3251 | type we are generating. | |
3252 | ||
3253 | We call ourself recursively to generate each modified type,` | |
3254 | until MODCOUNT reaches zero, at which point we have consumed | |
3255 | all the modifiers and generate either the fundamental type or | |
3256 | user defined type. When the recursion unwinds, each modifier | |
3257 | is applied in turn to generate the full modified type. | |
3258 | ||
3259 | NOTES | |
3260 | ||
3261 | If we find a modifier that we don't recognize, and it is not one | |
3262 | of those reserved for application specific use, then we issue a | |
3263 | warning and simply ignore the modifier. | |
3264 | ||
3265 | BUGS | |
3266 | ||
3267 | We currently ignore MOD_const and MOD_volatile. (FIXME) | |
3268 | ||
3269 | */ | |
3270 | ||
3271 | static struct type * | |
1ab3bf1b | 3272 | decode_modified_type (modifiers, modcount, mtype) |
1c92ca6f | 3273 | char *modifiers; |
1ab3bf1b JG |
3274 | unsigned int modcount; |
3275 | int mtype; | |
35f5886e FF |
3276 | { |
3277 | struct type *typep = NULL; | |
3278 | unsigned short fundtype; | |
13b5a7ff | 3279 | DIE_REF die_ref; |
1c92ca6f | 3280 | char modifier; |
13b5a7ff | 3281 | int nbytes; |
35f5886e FF |
3282 | |
3283 | if (modcount == 0) | |
3284 | { | |
3285 | switch (mtype) | |
3286 | { | |
3287 | case AT_mod_fund_type: | |
13b5a7ff FF |
3288 | nbytes = attribute_size (AT_fund_type); |
3289 | fundtype = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3290 | current_objfile); | |
35f5886e FF |
3291 | typep = decode_fund_type (fundtype); |
3292 | break; | |
3293 | case AT_mod_u_d_type: | |
13b5a7ff FF |
3294 | nbytes = attribute_size (AT_user_def_type); |
3295 | die_ref = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3296 | current_objfile); | |
3297 | if ((typep = lookup_utype (die_ref)) == NULL) | |
35f5886e | 3298 | { |
13b5a7ff | 3299 | typep = alloc_utype (die_ref, NULL); |
35f5886e FF |
3300 | } |
3301 | break; | |
3302 | default: | |
51b80b00 | 3303 | complain (&botched_modified_type, DIE_ID, DIE_NAME, mtype); |
bf229b4e | 3304 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
35f5886e FF |
3305 | break; |
3306 | } | |
3307 | } | |
3308 | else | |
3309 | { | |
3310 | modifier = *modifiers++; | |
3311 | typep = decode_modified_type (modifiers, --modcount, mtype); | |
3312 | switch (modifier) | |
3313 | { | |
13b5a7ff FF |
3314 | case MOD_pointer_to: |
3315 | typep = lookup_pointer_type (typep); | |
3316 | break; | |
3317 | case MOD_reference_to: | |
3318 | typep = lookup_reference_type (typep); | |
3319 | break; | |
3320 | case MOD_const: | |
51b80b00 | 3321 | complain (&const_ignored, DIE_ID, DIE_NAME); /* FIXME */ |
13b5a7ff FF |
3322 | break; |
3323 | case MOD_volatile: | |
51b80b00 | 3324 | complain (&volatile_ignored, DIE_ID, DIE_NAME); /* FIXME */ |
13b5a7ff FF |
3325 | break; |
3326 | default: | |
1c92ca6f FF |
3327 | if (!(MOD_lo_user <= (unsigned char) modifier |
3328 | && (unsigned char) modifier <= MOD_hi_user)) | |
13b5a7ff | 3329 | { |
51b80b00 | 3330 | complain (&unknown_type_modifier, DIE_ID, DIE_NAME, modifier); |
13b5a7ff FF |
3331 | } |
3332 | break; | |
35f5886e FF |
3333 | } |
3334 | } | |
3335 | return (typep); | |
3336 | } | |
3337 | ||
3338 | /* | |
3339 | ||
3340 | LOCAL FUNCTION | |
3341 | ||
3342 | decode_fund_type -- translate basic DWARF type to gdb base type | |
3343 | ||
3344 | DESCRIPTION | |
3345 | ||
3346 | Given an integer that is one of the fundamental DWARF types, | |
3347 | translate it to one of the basic internal gdb types and return | |
3348 | a pointer to the appropriate gdb type (a "struct type *"). | |
3349 | ||
3350 | NOTES | |
3351 | ||
85f0a848 FF |
3352 | For robustness, if we are asked to translate a fundamental |
3353 | type that we are unprepared to deal with, we return int so | |
3354 | callers can always depend upon a valid type being returned, | |
3355 | and so gdb may at least do something reasonable by default. | |
3356 | If the type is not in the range of those types defined as | |
3357 | application specific types, we also issue a warning. | |
35f5886e FF |
3358 | */ |
3359 | ||
3360 | static struct type * | |
1ab3bf1b JG |
3361 | decode_fund_type (fundtype) |
3362 | unsigned int fundtype; | |
35f5886e FF |
3363 | { |
3364 | struct type *typep = NULL; | |
3365 | ||
3366 | switch (fundtype) | |
3367 | { | |
3368 | ||
3369 | case FT_void: | |
bf229b4e | 3370 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); |
35f5886e FF |
3371 | break; |
3372 | ||
1ab3bf1b | 3373 | case FT_boolean: /* Was FT_set in AT&T version */ |
bf229b4e | 3374 | typep = dwarf_fundamental_type (current_objfile, FT_BOOLEAN); |
1ab3bf1b JG |
3375 | break; |
3376 | ||
35f5886e | 3377 | case FT_pointer: /* (void *) */ |
bf229b4e | 3378 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); |
1ab3bf1b | 3379 | typep = lookup_pointer_type (typep); |
35f5886e FF |
3380 | break; |
3381 | ||
3382 | case FT_char: | |
bf229b4e | 3383 | typep = dwarf_fundamental_type (current_objfile, FT_CHAR); |
1ab3bf1b JG |
3384 | break; |
3385 | ||
35f5886e | 3386 | case FT_signed_char: |
bf229b4e | 3387 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_CHAR); |
1ab3bf1b JG |
3388 | break; |
3389 | ||
3390 | case FT_unsigned_char: | |
bf229b4e | 3391 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); |
35f5886e FF |
3392 | break; |
3393 | ||
3394 | case FT_short: | |
bf229b4e | 3395 | typep = dwarf_fundamental_type (current_objfile, FT_SHORT); |
1ab3bf1b JG |
3396 | break; |
3397 | ||
35f5886e | 3398 | case FT_signed_short: |
bf229b4e | 3399 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_SHORT); |
1ab3bf1b JG |
3400 | break; |
3401 | ||
3402 | case FT_unsigned_short: | |
bf229b4e | 3403 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); |
35f5886e FF |
3404 | break; |
3405 | ||
3406 | case FT_integer: | |
bf229b4e | 3407 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1ab3bf1b JG |
3408 | break; |
3409 | ||
35f5886e | 3410 | case FT_signed_integer: |
bf229b4e | 3411 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_INTEGER); |
1ab3bf1b JG |
3412 | break; |
3413 | ||
3414 | case FT_unsigned_integer: | |
bf229b4e | 3415 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); |
35f5886e FF |
3416 | break; |
3417 | ||
3418 | case FT_long: | |
bf229b4e | 3419 | typep = dwarf_fundamental_type (current_objfile, FT_LONG); |
1ab3bf1b JG |
3420 | break; |
3421 | ||
35f5886e | 3422 | case FT_signed_long: |
bf229b4e | 3423 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG); |
35f5886e FF |
3424 | break; |
3425 | ||
1ab3bf1b | 3426 | case FT_unsigned_long: |
bf229b4e | 3427 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG); |
35f5886e FF |
3428 | break; |
3429 | ||
1ab3bf1b | 3430 | case FT_long_long: |
bf229b4e | 3431 | typep = dwarf_fundamental_type (current_objfile, FT_LONG_LONG); |
35f5886e | 3432 | break; |
1ab3bf1b JG |
3433 | |
3434 | case FT_signed_long_long: | |
bf229b4e | 3435 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG_LONG); |
35f5886e | 3436 | break; |
1ab3bf1b JG |
3437 | |
3438 | case FT_unsigned_long_long: | |
bf229b4e | 3439 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); |
35f5886e | 3440 | break; |
1ab3bf1b JG |
3441 | |
3442 | case FT_float: | |
bf229b4e | 3443 | typep = dwarf_fundamental_type (current_objfile, FT_FLOAT); |
35f5886e FF |
3444 | break; |
3445 | ||
1ab3bf1b | 3446 | case FT_dbl_prec_float: |
bf229b4e | 3447 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); |
35f5886e FF |
3448 | break; |
3449 | ||
3450 | case FT_ext_prec_float: | |
bf229b4e | 3451 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); |
35f5886e FF |
3452 | break; |
3453 | ||
3454 | case FT_complex: | |
bf229b4e | 3455 | typep = dwarf_fundamental_type (current_objfile, FT_COMPLEX); |
35f5886e FF |
3456 | break; |
3457 | ||
3458 | case FT_dbl_prec_complex: | |
bf229b4e | 3459 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_COMPLEX); |
35f5886e FF |
3460 | break; |
3461 | ||
1ab3bf1b | 3462 | case FT_ext_prec_complex: |
bf229b4e | 3463 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_COMPLEX); |
35f5886e | 3464 | break; |
1ab3bf1b | 3465 | |
35f5886e FF |
3466 | } |
3467 | ||
85f0a848 | 3468 | if (typep == NULL) |
35f5886e | 3469 | { |
85f0a848 FF |
3470 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
3471 | if (!(FT_lo_user <= fundtype && fundtype <= FT_hi_user)) | |
3472 | { | |
51b80b00 | 3473 | complain (&unexpected_fund_type, DIE_ID, DIE_NAME, fundtype); |
85f0a848 | 3474 | } |
35f5886e FF |
3475 | } |
3476 | ||
3477 | return (typep); | |
3478 | } | |
3479 | ||
3480 | /* | |
3481 | ||
3482 | LOCAL FUNCTION | |
3483 | ||
3484 | create_name -- allocate a fresh copy of a string on an obstack | |
3485 | ||
3486 | DESCRIPTION | |
3487 | ||
3488 | Given a pointer to a string and a pointer to an obstack, allocates | |
3489 | a fresh copy of the string on the specified obstack. | |
3490 | ||
3491 | */ | |
3492 | ||
3493 | static char * | |
1ab3bf1b JG |
3494 | create_name (name, obstackp) |
3495 | char *name; | |
3496 | struct obstack *obstackp; | |
35f5886e FF |
3497 | { |
3498 | int length; | |
3499 | char *newname; | |
3500 | ||
3501 | length = strlen (name) + 1; | |
3502 | newname = (char *) obstack_alloc (obstackp, length); | |
4ed3a9ea | 3503 | strcpy (newname, name); |
35f5886e FF |
3504 | return (newname); |
3505 | } | |
3506 | ||
3507 | /* | |
3508 | ||
3509 | LOCAL FUNCTION | |
3510 | ||
3511 | basicdieinfo -- extract the minimal die info from raw die data | |
3512 | ||
3513 | SYNOPSIS | |
3514 | ||
95967e73 FF |
3515 | void basicdieinfo (char *diep, struct dieinfo *dip, |
3516 | struct objfile *objfile) | |
35f5886e FF |
3517 | |
3518 | DESCRIPTION | |
3519 | ||
3520 | Given a pointer to raw DIE data, and a pointer to an instance of a | |
3521 | die info structure, this function extracts the basic information | |
3522 | from the DIE data required to continue processing this DIE, along | |
3523 | with some bookkeeping information about the DIE. | |
3524 | ||
3525 | The information we absolutely must have includes the DIE tag, | |
3526 | and the DIE length. If we need the sibling reference, then we | |
3527 | will have to call completedieinfo() to process all the remaining | |
3528 | DIE information. | |
3529 | ||
3530 | Note that since there is no guarantee that the data is properly | |
3531 | aligned in memory for the type of access required (indirection | |
95967e73 FF |
3532 | through anything other than a char pointer), and there is no |
3533 | guarantee that it is in the same byte order as the gdb host, | |
3534 | we call a function which deals with both alignment and byte | |
3535 | swapping issues. Possibly inefficient, but quite portable. | |
35f5886e FF |
3536 | |
3537 | We also take care of some other basic things at this point, such | |
3538 | as ensuring that the instance of the die info structure starts | |
3539 | out completely zero'd and that curdie is initialized for use | |
3540 | in error reporting if we have a problem with the current die. | |
3541 | ||
3542 | NOTES | |
3543 | ||
3544 | All DIE's must have at least a valid length, thus the minimum | |
13b5a7ff FF |
3545 | DIE size is SIZEOF_DIE_LENGTH. In order to have a valid tag, the |
3546 | DIE size must be at least SIZEOF_DIE_TAG larger, otherwise they | |
35f5886e FF |
3547 | are forced to be TAG_padding DIES. |
3548 | ||
13b5a7ff FF |
3549 | Padding DIES must be at least SIZEOF_DIE_LENGTH in length, implying |
3550 | that if a padding DIE is used for alignment and the amount needed is | |
3551 | less than SIZEOF_DIE_LENGTH, then the padding DIE has to be big | |
3552 | enough to align to the next alignment boundry. | |
4090fe1c FF |
3553 | |
3554 | We do some basic sanity checking here, such as verifying that the | |
3555 | length of the die would not cause it to overrun the recorded end of | |
3556 | the buffer holding the DIE info. If we find a DIE that is either | |
3557 | too small or too large, we force it's length to zero which should | |
3558 | cause the caller to take appropriate action. | |
35f5886e FF |
3559 | */ |
3560 | ||
3561 | static void | |
95967e73 | 3562 | basicdieinfo (dip, diep, objfile) |
1ab3bf1b JG |
3563 | struct dieinfo *dip; |
3564 | char *diep; | |
95967e73 | 3565 | struct objfile *objfile; |
35f5886e FF |
3566 | { |
3567 | curdie = dip; | |
4ed3a9ea | 3568 | memset (dip, 0, sizeof (struct dieinfo)); |
35f5886e | 3569 | dip -> die = diep; |
13b5a7ff FF |
3570 | dip -> die_ref = dbroff + (diep - dbbase); |
3571 | dip -> die_length = target_to_host (diep, SIZEOF_DIE_LENGTH, GET_UNSIGNED, | |
3572 | objfile); | |
4090fe1c FF |
3573 | if ((dip -> die_length < SIZEOF_DIE_LENGTH) || |
3574 | ((diep + dip -> die_length) > (dbbase + dbsize))) | |
35f5886e | 3575 | { |
51b80b00 | 3576 | complain (&malformed_die, DIE_ID, DIE_NAME, dip -> die_length); |
4090fe1c | 3577 | dip -> die_length = 0; |
35f5886e | 3578 | } |
13b5a7ff | 3579 | else if (dip -> die_length < (SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG)) |
35f5886e | 3580 | { |
13b5a7ff | 3581 | dip -> die_tag = TAG_padding; |
35f5886e FF |
3582 | } |
3583 | else | |
3584 | { | |
13b5a7ff FF |
3585 | diep += SIZEOF_DIE_LENGTH; |
3586 | dip -> die_tag = target_to_host (diep, SIZEOF_DIE_TAG, GET_UNSIGNED, | |
3587 | objfile); | |
35f5886e FF |
3588 | } |
3589 | } | |
3590 | ||
3591 | /* | |
3592 | ||
3593 | LOCAL FUNCTION | |
3594 | ||
3595 | completedieinfo -- finish reading the information for a given DIE | |
3596 | ||
3597 | SYNOPSIS | |
3598 | ||
95967e73 | 3599 | void completedieinfo (struct dieinfo *dip, struct objfile *objfile) |
35f5886e FF |
3600 | |
3601 | DESCRIPTION | |
3602 | ||
3603 | Given a pointer to an already partially initialized die info structure, | |
3604 | scan the raw DIE data and finish filling in the die info structure | |
3605 | from the various attributes found. | |
3606 | ||
3607 | Note that since there is no guarantee that the data is properly | |
3608 | aligned in memory for the type of access required (indirection | |
95967e73 FF |
3609 | through anything other than a char pointer), and there is no |
3610 | guarantee that it is in the same byte order as the gdb host, | |
3611 | we call a function which deals with both alignment and byte | |
3612 | swapping issues. Possibly inefficient, but quite portable. | |
35f5886e FF |
3613 | |
3614 | NOTES | |
3615 | ||
3616 | Each time we are called, we increment the diecount variable, which | |
3617 | keeps an approximate count of the number of dies processed for | |
3618 | each compilation unit. This information is presented to the user | |
3619 | if the info_verbose flag is set. | |
3620 | ||
3621 | */ | |
3622 | ||
3623 | static void | |
95967e73 | 3624 | completedieinfo (dip, objfile) |
1ab3bf1b | 3625 | struct dieinfo *dip; |
95967e73 | 3626 | struct objfile *objfile; |
35f5886e FF |
3627 | { |
3628 | char *diep; /* Current pointer into raw DIE data */ | |
3629 | char *end; /* Terminate DIE scan here */ | |
3630 | unsigned short attr; /* Current attribute being scanned */ | |
3631 | unsigned short form; /* Form of the attribute */ | |
13b5a7ff | 3632 | int nbytes; /* Size of next field to read */ |
35f5886e FF |
3633 | |
3634 | diecount++; | |
3635 | diep = dip -> die; | |
13b5a7ff FF |
3636 | end = diep + dip -> die_length; |
3637 | diep += SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG; | |
35f5886e FF |
3638 | while (diep < end) |
3639 | { | |
13b5a7ff FF |
3640 | attr = target_to_host (diep, SIZEOF_ATTRIBUTE, GET_UNSIGNED, objfile); |
3641 | diep += SIZEOF_ATTRIBUTE; | |
3642 | if ((nbytes = attribute_size (attr)) == -1) | |
3643 | { | |
51b80b00 | 3644 | complain (&unknown_attribute_length, DIE_ID, DIE_NAME); |
13b5a7ff FF |
3645 | diep = end; |
3646 | continue; | |
3647 | } | |
35f5886e FF |
3648 | switch (attr) |
3649 | { | |
3650 | case AT_fund_type: | |
13b5a7ff FF |
3651 | dip -> at_fund_type = target_to_host (diep, nbytes, GET_UNSIGNED, |
3652 | objfile); | |
35f5886e FF |
3653 | break; |
3654 | case AT_ordering: | |
13b5a7ff FF |
3655 | dip -> at_ordering = target_to_host (diep, nbytes, GET_UNSIGNED, |
3656 | objfile); | |
35f5886e FF |
3657 | break; |
3658 | case AT_bit_offset: | |
13b5a7ff FF |
3659 | dip -> at_bit_offset = target_to_host (diep, nbytes, GET_UNSIGNED, |
3660 | objfile); | |
35f5886e | 3661 | break; |
35f5886e | 3662 | case AT_sibling: |
13b5a7ff FF |
3663 | dip -> at_sibling = target_to_host (diep, nbytes, GET_UNSIGNED, |
3664 | objfile); | |
35f5886e FF |
3665 | break; |
3666 | case AT_stmt_list: | |
13b5a7ff FF |
3667 | dip -> at_stmt_list = target_to_host (diep, nbytes, GET_UNSIGNED, |
3668 | objfile); | |
2d6186f4 | 3669 | dip -> has_at_stmt_list = 1; |
35f5886e FF |
3670 | break; |
3671 | case AT_low_pc: | |
13b5a7ff FF |
3672 | dip -> at_low_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3673 | objfile); | |
4d315a07 | 3674 | dip -> at_low_pc += baseaddr; |
2d6186f4 | 3675 | dip -> has_at_low_pc = 1; |
35f5886e FF |
3676 | break; |
3677 | case AT_high_pc: | |
13b5a7ff FF |
3678 | dip -> at_high_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3679 | objfile); | |
4d315a07 | 3680 | dip -> at_high_pc += baseaddr; |
35f5886e FF |
3681 | break; |
3682 | case AT_language: | |
13b5a7ff FF |
3683 | dip -> at_language = target_to_host (diep, nbytes, GET_UNSIGNED, |
3684 | objfile); | |
35f5886e FF |
3685 | break; |
3686 | case AT_user_def_type: | |
13b5a7ff FF |
3687 | dip -> at_user_def_type = target_to_host (diep, nbytes, |
3688 | GET_UNSIGNED, objfile); | |
35f5886e FF |
3689 | break; |
3690 | case AT_byte_size: | |
13b5a7ff FF |
3691 | dip -> at_byte_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3692 | objfile); | |
50055e94 | 3693 | dip -> has_at_byte_size = 1; |
35f5886e FF |
3694 | break; |
3695 | case AT_bit_size: | |
13b5a7ff FF |
3696 | dip -> at_bit_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3697 | objfile); | |
35f5886e FF |
3698 | break; |
3699 | case AT_member: | |
13b5a7ff FF |
3700 | dip -> at_member = target_to_host (diep, nbytes, GET_UNSIGNED, |
3701 | objfile); | |
35f5886e FF |
3702 | break; |
3703 | case AT_discr: | |
13b5a7ff FF |
3704 | dip -> at_discr = target_to_host (diep, nbytes, GET_UNSIGNED, |
3705 | objfile); | |
35f5886e | 3706 | break; |
35f5886e FF |
3707 | case AT_location: |
3708 | dip -> at_location = diep; | |
3709 | break; | |
3710 | case AT_mod_fund_type: | |
3711 | dip -> at_mod_fund_type = diep; | |
3712 | break; | |
3713 | case AT_subscr_data: | |
3714 | dip -> at_subscr_data = diep; | |
3715 | break; | |
3716 | case AT_mod_u_d_type: | |
3717 | dip -> at_mod_u_d_type = diep; | |
3718 | break; | |
35f5886e FF |
3719 | case AT_element_list: |
3720 | dip -> at_element_list = diep; | |
768be6e1 FF |
3721 | dip -> short_element_list = 0; |
3722 | break; | |
3723 | case AT_short_element_list: | |
3724 | dip -> at_element_list = diep; | |
3725 | dip -> short_element_list = 1; | |
35f5886e FF |
3726 | break; |
3727 | case AT_discr_value: | |
3728 | dip -> at_discr_value = diep; | |
3729 | break; | |
3730 | case AT_string_length: | |
3731 | dip -> at_string_length = diep; | |
3732 | break; | |
3733 | case AT_name: | |
3734 | dip -> at_name = diep; | |
3735 | break; | |
3736 | case AT_comp_dir: | |
d4902ab0 FF |
3737 | /* For now, ignore any "hostname:" portion, since gdb doesn't |
3738 | know how to deal with it. (FIXME). */ | |
3739 | dip -> at_comp_dir = strrchr (diep, ':'); | |
3740 | if (dip -> at_comp_dir != NULL) | |
3741 | { | |
3742 | dip -> at_comp_dir++; | |
3743 | } | |
3744 | else | |
3745 | { | |
3746 | dip -> at_comp_dir = diep; | |
3747 | } | |
35f5886e FF |
3748 | break; |
3749 | case AT_producer: | |
3750 | dip -> at_producer = diep; | |
3751 | break; | |
35f5886e | 3752 | case AT_start_scope: |
13b5a7ff FF |
3753 | dip -> at_start_scope = target_to_host (diep, nbytes, GET_UNSIGNED, |
3754 | objfile); | |
35f5886e FF |
3755 | break; |
3756 | case AT_stride_size: | |
13b5a7ff FF |
3757 | dip -> at_stride_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3758 | objfile); | |
35f5886e FF |
3759 | break; |
3760 | case AT_src_info: | |
13b5a7ff FF |
3761 | dip -> at_src_info = target_to_host (diep, nbytes, GET_UNSIGNED, |
3762 | objfile); | |
35f5886e FF |
3763 | break; |
3764 | case AT_prototyped: | |
13b5a7ff | 3765 | dip -> at_prototyped = diep; |
35f5886e | 3766 | break; |
35f5886e FF |
3767 | default: |
3768 | /* Found an attribute that we are unprepared to handle. However | |
3769 | it is specifically one of the design goals of DWARF that | |
3770 | consumers should ignore unknown attributes. As long as the | |
3771 | form is one that we recognize (so we know how to skip it), | |
3772 | we can just ignore the unknown attribute. */ | |
3773 | break; | |
3774 | } | |
13b5a7ff | 3775 | form = FORM_FROM_ATTR (attr); |
35f5886e FF |
3776 | switch (form) |
3777 | { | |
3778 | case FORM_DATA2: | |
13b5a7ff | 3779 | diep += 2; |
35f5886e FF |
3780 | break; |
3781 | case FORM_DATA4: | |
13b5a7ff FF |
3782 | case FORM_REF: |
3783 | diep += 4; | |
35f5886e FF |
3784 | break; |
3785 | case FORM_DATA8: | |
13b5a7ff | 3786 | diep += 8; |
35f5886e FF |
3787 | break; |
3788 | case FORM_ADDR: | |
13b5a7ff | 3789 | diep += TARGET_FT_POINTER_SIZE (objfile); |
35f5886e FF |
3790 | break; |
3791 | case FORM_BLOCK2: | |
13b5a7ff | 3792 | diep += 2 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); |
35f5886e FF |
3793 | break; |
3794 | case FORM_BLOCK4: | |
13b5a7ff | 3795 | diep += 4 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); |
35f5886e FF |
3796 | break; |
3797 | case FORM_STRING: | |
3798 | diep += strlen (diep) + 1; | |
3799 | break; | |
3800 | default: | |
51b80b00 | 3801 | complain (&unknown_attribute_form, DIE_ID, DIE_NAME, form); |
35f5886e FF |
3802 | diep = end; |
3803 | break; | |
3804 | } | |
3805 | } | |
3806 | } | |
95967e73 | 3807 | |
13b5a7ff | 3808 | /* |
95967e73 | 3809 | |
13b5a7ff FF |
3810 | LOCAL FUNCTION |
3811 | ||
3812 | target_to_host -- swap in target data to host | |
3813 | ||
3814 | SYNOPSIS | |
3815 | ||
3816 | target_to_host (char *from, int nbytes, int signextend, | |
3817 | struct objfile *objfile) | |
3818 | ||
3819 | DESCRIPTION | |
3820 | ||
3821 | Given pointer to data in target format in FROM, a byte count for | |
3822 | the size of the data in NBYTES, a flag indicating whether or not | |
3823 | the data is signed in SIGNEXTEND, and a pointer to the current | |
3824 | objfile in OBJFILE, convert the data to host format and return | |
3825 | the converted value. | |
3826 | ||
3827 | NOTES | |
3828 | ||
3829 | FIXME: If we read data that is known to be signed, and expect to | |
3830 | use it as signed data, then we need to explicitly sign extend the | |
3831 | result until the bfd library is able to do this for us. | |
3832 | ||
3833 | */ | |
3834 | ||
3835 | static unsigned long | |
3836 | target_to_host (from, nbytes, signextend, objfile) | |
95967e73 FF |
3837 | char *from; |
3838 | int nbytes; | |
13b5a7ff | 3839 | int signextend; /* FIXME: Unused */ |
95967e73 FF |
3840 | struct objfile *objfile; |
3841 | { | |
13b5a7ff | 3842 | unsigned long rtnval; |
95967e73 FF |
3843 | |
3844 | switch (nbytes) | |
3845 | { | |
95967e73 | 3846 | case 8: |
13b5a7ff | 3847 | rtnval = bfd_get_64 (objfile -> obfd, (bfd_byte *) from); |
95967e73 | 3848 | break; |
95967e73 | 3849 | case 4: |
13b5a7ff | 3850 | rtnval = bfd_get_32 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3851 | break; |
3852 | case 2: | |
13b5a7ff | 3853 | rtnval = bfd_get_16 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3854 | break; |
3855 | case 1: | |
13b5a7ff | 3856 | rtnval = bfd_get_8 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3857 | break; |
3858 | default: | |
51b80b00 | 3859 | complain (&no_bfd_get_N, DIE_ID, DIE_NAME, nbytes); |
13b5a7ff | 3860 | rtnval = 0; |
95967e73 FF |
3861 | break; |
3862 | } | |
13b5a7ff | 3863 | return (rtnval); |
95967e73 FF |
3864 | } |
3865 | ||
13b5a7ff FF |
3866 | /* |
3867 | ||
3868 | LOCAL FUNCTION | |
3869 | ||
3870 | attribute_size -- compute size of data for a DWARF attribute | |
3871 | ||
3872 | SYNOPSIS | |
3873 | ||
3874 | static int attribute_size (unsigned int attr) | |
3875 | ||
3876 | DESCRIPTION | |
3877 | ||
3878 | Given a DWARF attribute in ATTR, compute the size of the first | |
3879 | piece of data associated with this attribute and return that | |
3880 | size. | |
3881 | ||
3882 | Returns -1 for unrecognized attributes. | |
3883 | ||
3884 | */ | |
3885 | ||
3886 | static int | |
3887 | attribute_size (attr) | |
3888 | unsigned int attr; | |
3889 | { | |
3890 | int nbytes; /* Size of next data for this attribute */ | |
3891 | unsigned short form; /* Form of the attribute */ | |
3892 | ||
3893 | form = FORM_FROM_ATTR (attr); | |
3894 | switch (form) | |
3895 | { | |
3896 | case FORM_STRING: /* A variable length field is next */ | |
3897 | nbytes = 0; | |
3898 | break; | |
3899 | case FORM_DATA2: /* Next 2 byte field is the data itself */ | |
3900 | case FORM_BLOCK2: /* Next 2 byte field is a block length */ | |
3901 | nbytes = 2; | |
3902 | break; | |
3903 | case FORM_DATA4: /* Next 4 byte field is the data itself */ | |
3904 | case FORM_BLOCK4: /* Next 4 byte field is a block length */ | |
3905 | case FORM_REF: /* Next 4 byte field is a DIE offset */ | |
3906 | nbytes = 4; | |
3907 | break; | |
3908 | case FORM_DATA8: /* Next 8 byte field is the data itself */ | |
3909 | nbytes = 8; | |
3910 | break; | |
3911 | case FORM_ADDR: /* Next field size is target sizeof(void *) */ | |
3912 | nbytes = TARGET_FT_POINTER_SIZE (objfile); | |
3913 | break; | |
3914 | default: | |
51b80b00 | 3915 | complain (&unknown_attribute_form, DIE_ID, DIE_NAME, form); |
13b5a7ff FF |
3916 | nbytes = -1; |
3917 | break; | |
3918 | } | |
3919 | return (nbytes); | |
3920 | } |