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 | ||
200 | #ifndef CFRONT_PRODUCER | |
201 | #define CFRONT_PRODUCER "CFRONT " /* A wild a** guess... */ | |
202 | #endif | |
203 | ||
93bb6e65 FF |
204 | /* start-sanitize-chill */ |
205 | #ifndef CHILL_PRODUCER | |
206 | #define CHILL_PRODUCER "GNU Chill " | |
207 | #endif | |
208 | /* end-sanitize-chill */ | |
209 | ||
13b5a7ff FF |
210 | /* Flags to target_to_host() that tell whether or not the data object is |
211 | expected to be signed. Used, for example, when fetching a signed | |
212 | integer in the target environment which is used as a signed integer | |
213 | in the host environment, and the two environments have different sized | |
214 | ints. In this case, *somebody* has to sign extend the smaller sized | |
215 | int. */ | |
216 | ||
217 | #define GET_UNSIGNED 0 /* No sign extension required */ | |
218 | #define GET_SIGNED 1 /* Sign extension required */ | |
219 | ||
220 | /* Defines for things which are specified in the document "DWARF Debugging | |
221 | Information Format" published by UNIX International, Programming Languages | |
222 | SIG. These defines are based on revision 1.0.0, Jan 20, 1992. */ | |
223 | ||
224 | #define SIZEOF_DIE_LENGTH 4 | |
225 | #define SIZEOF_DIE_TAG 2 | |
226 | #define SIZEOF_ATTRIBUTE 2 | |
227 | #define SIZEOF_FORMAT_SPECIFIER 1 | |
228 | #define SIZEOF_FMT_FT 2 | |
229 | #define SIZEOF_LINETBL_LENGTH 4 | |
230 | #define SIZEOF_LINETBL_LINENO 4 | |
231 | #define SIZEOF_LINETBL_STMT 2 | |
232 | #define SIZEOF_LINETBL_DELTA 4 | |
233 | #define SIZEOF_LOC_ATOM_CODE 1 | |
234 | ||
235 | #define FORM_FROM_ATTR(attr) ((attr) & 0xF) /* Implicitly specified */ | |
236 | ||
237 | /* Macros that return the sizes of various types of data in the target | |
238 | environment. | |
239 | ||
2d6d969c FF |
240 | FIXME: Currently these are just compile time constants (as they are in |
241 | other parts of gdb as well). They need to be able to get the right size | |
242 | either from the bfd or possibly from the DWARF info. It would be nice if | |
243 | the DWARF producer inserted DIES that describe the fundamental types in | |
244 | the target environment into the DWARF info, similar to the way dbx stabs | |
245 | producers produce information about their fundamental types. */ | |
246 | ||
247 | #define TARGET_FT_POINTER_SIZE(objfile) (TARGET_PTR_BIT / TARGET_CHAR_BIT) | |
248 | #define TARGET_FT_LONG_SIZE(objfile) (TARGET_LONG_BIT / TARGET_CHAR_BIT) | |
95967e73 | 249 | |
768be6e1 FF |
250 | /* The Amiga SVR4 header file <dwarf.h> defines AT_element_list as a |
251 | FORM_BLOCK2, and this is the value emitted by the AT&T compiler. | |
252 | However, the Issue 2 DWARF specification from AT&T defines it as | |
253 | a FORM_BLOCK4, as does the latest specification from UI/PLSIG. | |
254 | For backwards compatibility with the AT&T compiler produced executables | |
255 | we define AT_short_element_list for this variant. */ | |
256 | ||
257 | #define AT_short_element_list (0x00f0|FORM_BLOCK2) | |
258 | ||
259 | /* External variables referenced. */ | |
260 | ||
35f5886e | 261 | extern int info_verbose; /* From main.c; nonzero => verbose */ |
318bf84f | 262 | extern char *warning_pre_print; /* From utils.c */ |
35f5886e FF |
263 | |
264 | /* The DWARF debugging information consists of two major pieces, | |
265 | one is a block of DWARF Information Entries (DIE's) and the other | |
266 | is a line number table. The "struct dieinfo" structure contains | |
267 | the information for a single DIE, the one currently being processed. | |
268 | ||
269 | In order to make it easier to randomly access the attribute fields | |
13b5a7ff | 270 | of the current DIE, which are specifically unordered within the DIE, |
35f5886e FF |
271 | each DIE is scanned and an instance of the "struct dieinfo" |
272 | structure is initialized. | |
273 | ||
274 | Initialization is done in two levels. The first, done by basicdieinfo(), | |
275 | just initializes those fields that are vital to deciding whether or not | |
276 | to use this DIE, how to skip past it, etc. The second, done by the | |
277 | function completedieinfo(), fills in the rest of the information. | |
278 | ||
279 | Attributes which have block forms are not interpreted at the time | |
280 | the DIE is scanned, instead we just save pointers to the start | |
281 | of their value fields. | |
282 | ||
283 | Some fields have a flag <name>_p that is set when the value of the | |
284 | field is valid (I.E. we found a matching attribute in the DIE). Since | |
285 | we may want to test for the presence of some attributes in the DIE, | |
2d6186f4 | 286 | such as AT_low_pc, without restricting the values of the field, |
35f5886e FF |
287 | we need someway to note that we found such an attribute. |
288 | ||
289 | */ | |
290 | ||
291 | typedef char BLOCK; | |
292 | ||
293 | struct dieinfo { | |
13b5a7ff FF |
294 | char * die; /* Pointer to the raw DIE data */ |
295 | unsigned long die_length; /* Length of the raw DIE data */ | |
296 | DIE_REF die_ref; /* Offset of this DIE */ | |
297 | unsigned short die_tag; /* Tag for this DIE */ | |
298 | unsigned long at_padding; | |
299 | unsigned long at_sibling; | |
300 | BLOCK * at_location; | |
301 | char * at_name; | |
302 | unsigned short at_fund_type; | |
303 | BLOCK * at_mod_fund_type; | |
304 | unsigned long at_user_def_type; | |
305 | BLOCK * at_mod_u_d_type; | |
306 | unsigned short at_ordering; | |
307 | BLOCK * at_subscr_data; | |
308 | unsigned long at_byte_size; | |
309 | unsigned short at_bit_offset; | |
310 | unsigned long at_bit_size; | |
311 | BLOCK * at_element_list; | |
312 | unsigned long at_stmt_list; | |
313 | unsigned long at_low_pc; | |
314 | unsigned long at_high_pc; | |
315 | unsigned long at_language; | |
316 | unsigned long at_member; | |
317 | unsigned long at_discr; | |
318 | BLOCK * at_discr_value; | |
13b5a7ff FF |
319 | BLOCK * at_string_length; |
320 | char * at_comp_dir; | |
321 | char * at_producer; | |
13b5a7ff FF |
322 | unsigned long at_start_scope; |
323 | unsigned long at_stride_size; | |
324 | unsigned long at_src_info; | |
325 | char * at_prototyped; | |
326 | unsigned int has_at_low_pc:1; | |
327 | unsigned int has_at_stmt_list:1; | |
50055e94 | 328 | unsigned int has_at_byte_size:1; |
13b5a7ff | 329 | unsigned int short_element_list:1; |
35f5886e FF |
330 | }; |
331 | ||
332 | static int diecount; /* Approximate count of dies for compilation unit */ | |
333 | static struct dieinfo *curdie; /* For warnings and such */ | |
334 | ||
335 | static char *dbbase; /* Base pointer to dwarf info */ | |
4090fe1c | 336 | static int dbsize; /* Size of dwarf info in bytes */ |
35f5886e FF |
337 | static int dbroff; /* Relative offset from start of .debug section */ |
338 | static char *lnbase; /* Base pointer to line section */ | |
339 | static int isreg; /* Kludge to identify register variables */ | |
a5bd5ba6 | 340 | static int offreg; /* Kludge to identify basereg references */ |
35f5886e | 341 | |
2670f34d JG |
342 | /* This value is added to each symbol value. FIXME: Generalize to |
343 | the section_offsets structure used by dbxread. */ | |
35f5886e FF |
344 | static CORE_ADDR baseaddr; /* Add to each symbol value */ |
345 | ||
2670f34d JG |
346 | /* The section offsets used in the current psymtab or symtab. FIXME, |
347 | only used to pass one value (baseaddr) at the moment. */ | |
348 | static struct section_offsets *base_section_offsets; | |
349 | ||
35f5886e FF |
350 | /* Each partial symbol table entry contains a pointer to private data for the |
351 | read_symtab() function to use when expanding a partial symbol table entry | |
352 | to a full symbol table entry. For DWARF debugging info, this data is | |
353 | contained in the following structure and macros are provided for easy | |
354 | access to the members given a pointer to a partial symbol table entry. | |
355 | ||
356 | dbfoff Always the absolute file offset to the start of the ".debug" | |
357 | section for the file containing the DIE's being accessed. | |
358 | ||
359 | dbroff Relative offset from the start of the ".debug" access to the | |
360 | first DIE to be accessed. When building the partial symbol | |
361 | table, this value will be zero since we are accessing the | |
362 | entire ".debug" section. When expanding a partial symbol | |
363 | table entry, this value will be the offset to the first | |
364 | DIE for the compilation unit containing the symbol that | |
365 | triggers the expansion. | |
366 | ||
367 | dblength The size of the chunk of DIE's being examined, in bytes. | |
368 | ||
369 | lnfoff The absolute file offset to the line table fragment. Ignored | |
370 | when building partial symbol tables, but used when expanding | |
371 | them, and contains the absolute file offset to the fragment | |
372 | of the ".line" section containing the line numbers for the | |
373 | current compilation unit. | |
374 | */ | |
375 | ||
376 | struct dwfinfo { | |
d5931d79 | 377 | file_ptr dbfoff; /* Absolute file offset to start of .debug section */ |
35f5886e FF |
378 | int dbroff; /* Relative offset from start of .debug section */ |
379 | int dblength; /* Size of the chunk of DIE's being examined */ | |
d5931d79 | 380 | file_ptr lnfoff; /* Absolute file offset to line table fragment */ |
35f5886e FF |
381 | }; |
382 | ||
383 | #define DBFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbfoff) | |
384 | #define DBROFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbroff) | |
385 | #define DBLENGTH(p) (((struct dwfinfo *)((p)->read_symtab_private))->dblength) | |
386 | #define LNFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->lnfoff) | |
387 | ||
4d315a07 FF |
388 | /* The generic symbol table building routines have separate lists for |
389 | file scope symbols and all all other scopes (local scopes). So | |
390 | we need to select the right one to pass to add_symbol_to_list(). | |
391 | We do it by keeping a pointer to the correct list in list_in_scope. | |
35f5886e | 392 | |
4d315a07 FF |
393 | FIXME: The original dwarf code just treated the file scope as the first |
394 | local scope, and all other local scopes as nested local scopes, and worked | |
395 | fine. Check to see if we really need to distinguish these in buildsym.c */ | |
35f5886e | 396 | |
99140c31 | 397 | struct pending **list_in_scope = &file_symbols; |
35f5886e FF |
398 | |
399 | /* DIES which have user defined types or modified user defined types refer to | |
400 | other DIES for the type information. Thus we need to associate the offset | |
401 | of a DIE for a user defined type with a pointer to the type information. | |
402 | ||
403 | Originally this was done using a simple but expensive algorithm, with an | |
404 | array of unsorted structures, each containing an offset/type-pointer pair. | |
405 | This array was scanned linearly each time a lookup was done. The result | |
406 | was that gdb was spending over half it's startup time munging through this | |
407 | array of pointers looking for a structure that had the right offset member. | |
408 | ||
409 | The second attempt used the same array of structures, but the array was | |
410 | sorted using qsort each time a new offset/type was recorded, and a binary | |
411 | search was used to find the type pointer for a given DIE offset. This was | |
412 | even slower, due to the overhead of sorting the array each time a new | |
413 | offset/type pair was entered. | |
414 | ||
415 | The third attempt uses a fixed size array of type pointers, indexed by a | |
416 | value derived from the DIE offset. Since the minimum DIE size is 4 bytes, | |
417 | we can divide any DIE offset by 4 to obtain a unique index into this fixed | |
418 | size array. Since each element is a 4 byte pointer, it takes exactly as | |
419 | much memory to hold this array as to hold the DWARF info for a given | |
bf229b4e FF |
420 | compilation unit. But it gets freed as soon as we are done with it. |
421 | This has worked well in practice, as a reasonable tradeoff between memory | |
422 | consumption and speed, without having to resort to much more complicated | |
423 | algorithms. */ | |
35f5886e FF |
424 | |
425 | static struct type **utypes; /* Pointer to array of user type pointers */ | |
426 | static int numutypes; /* Max number of user type pointers */ | |
427 | ||
bf229b4e FF |
428 | /* Maintain an array of referenced fundamental types for the current |
429 | compilation unit being read. For DWARF version 1, we have to construct | |
430 | the fundamental types on the fly, since no information about the | |
431 | fundamental types is supplied. Each such fundamental type is created by | |
432 | calling a language dependent routine to create the type, and then a | |
433 | pointer to that type is then placed in the array at the index specified | |
434 | by it's FT_<TYPENAME> value. The array has a fixed size set by the | |
435 | FT_NUM_MEMBERS compile time constant, which is the number of predefined | |
436 | fundamental types gdb knows how to construct. */ | |
437 | ||
438 | static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */ | |
439 | ||
95ff889e FF |
440 | /* Record the language for the compilation unit which is currently being |
441 | processed. We know it once we have seen the TAG_compile_unit DIE, | |
442 | and we need it while processing the DIE's for that compilation unit. | |
443 | It is eventually saved in the symtab structure, but we don't finalize | |
444 | the symtab struct until we have processed all the DIE's for the | |
bf229b4e FF |
445 | compilation unit. We also need to get and save a pointer to the |
446 | language struct for this language, so we can call the language | |
447 | dependent routines for doing things such as creating fundamental | |
448 | types. */ | |
95ff889e FF |
449 | |
450 | static enum language cu_language; | |
bf229b4e | 451 | static const struct language_defn *cu_language_defn; |
95ff889e | 452 | |
35f5886e | 453 | /* Forward declarations of static functions so we don't have to worry |
1ab3bf1b JG |
454 | about ordering within this file. */ |
455 | ||
13b5a7ff FF |
456 | static int |
457 | attribute_size PARAMS ((unsigned int)); | |
458 | ||
459 | static unsigned long | |
460 | target_to_host PARAMS ((char *, int, int, struct objfile *)); | |
95967e73 | 461 | |
1ab3bf1b JG |
462 | static void |
463 | add_enum_psymbol PARAMS ((struct dieinfo *, struct objfile *)); | |
464 | ||
2dbde378 FF |
465 | static void |
466 | handle_producer PARAMS ((char *)); | |
467 | ||
1ab3bf1b JG |
468 | static void |
469 | read_file_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); | |
35f5886e | 470 | |
58050209 | 471 | static void |
1ab3bf1b | 472 | read_func_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
473 | |
474 | static void | |
1ab3bf1b JG |
475 | read_lexical_block_scope PARAMS ((struct dieinfo *, char *, char *, |
476 | struct objfile *)); | |
35f5886e | 477 | |
35f5886e | 478 | static void |
1ab3bf1b | 479 | scan_partial_symbols PARAMS ((char *, char *, struct objfile *)); |
35f5886e | 480 | |
35f5886e | 481 | static void |
d5931d79 JG |
482 | scan_compilation_units PARAMS ((char *, char *, file_ptr, |
483 | file_ptr, struct objfile *)); | |
35f5886e FF |
484 | |
485 | static void | |
1ab3bf1b | 486 | add_partial_symbol PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e FF |
487 | |
488 | static void | |
1ab3bf1b | 489 | init_psymbol_list PARAMS ((struct objfile *, int)); |
35f5886e FF |
490 | |
491 | static void | |
95967e73 | 492 | basicdieinfo PARAMS ((struct dieinfo *, char *, struct objfile *)); |
35f5886e FF |
493 | |
494 | static void | |
95967e73 | 495 | completedieinfo PARAMS ((struct dieinfo *, struct objfile *)); |
1ab3bf1b JG |
496 | |
497 | static void | |
498 | dwarf_psymtab_to_symtab PARAMS ((struct partial_symtab *)); | |
499 | ||
500 | static void | |
501 | psymtab_to_symtab_1 PARAMS ((struct partial_symtab *)); | |
35f5886e FF |
502 | |
503 | static struct symtab * | |
1ab3bf1b | 504 | read_ofile_symtab PARAMS ((struct partial_symtab *)); |
35f5886e FF |
505 | |
506 | static void | |
1ab3bf1b | 507 | process_dies PARAMS ((char *, char *, struct objfile *)); |
35f5886e FF |
508 | |
509 | static void | |
1ab3bf1b JG |
510 | read_structure_scope PARAMS ((struct dieinfo *, char *, char *, |
511 | struct objfile *)); | |
35f5886e FF |
512 | |
513 | static struct type * | |
84ffdec2 | 514 | decode_array_element_type PARAMS ((char *)); |
35f5886e FF |
515 | |
516 | static struct type * | |
85f0a848 | 517 | decode_subscript_data_item PARAMS ((char *, char *)); |
35f5886e FF |
518 | |
519 | static void | |
1ab3bf1b | 520 | dwarf_read_array_type PARAMS ((struct dieinfo *)); |
35f5886e | 521 | |
9e4c1921 | 522 | static void |
1ab3bf1b | 523 | read_tag_pointer_type PARAMS ((struct dieinfo *dip)); |
9e4c1921 | 524 | |
ec16f701 FF |
525 | static void |
526 | read_tag_string_type PARAMS ((struct dieinfo *dip)); | |
527 | ||
35f5886e | 528 | static void |
1ab3bf1b | 529 | read_subroutine_type PARAMS ((struct dieinfo *, char *, char *)); |
35f5886e FF |
530 | |
531 | static void | |
1ab3bf1b | 532 | read_enumeration PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
533 | |
534 | static struct type * | |
1ab3bf1b | 535 | struct_type PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
536 | |
537 | static struct type * | |
1ab3bf1b | 538 | enum_type PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e | 539 | |
35f5886e | 540 | static void |
1ab3bf1b | 541 | decode_line_numbers PARAMS ((char *)); |
35f5886e FF |
542 | |
543 | static struct type * | |
1ab3bf1b | 544 | decode_die_type PARAMS ((struct dieinfo *)); |
35f5886e FF |
545 | |
546 | static struct type * | |
1ab3bf1b | 547 | decode_mod_fund_type PARAMS ((char *)); |
35f5886e FF |
548 | |
549 | static struct type * | |
1ab3bf1b | 550 | decode_mod_u_d_type PARAMS ((char *)); |
35f5886e FF |
551 | |
552 | static struct type * | |
1c92ca6f | 553 | decode_modified_type PARAMS ((char *, unsigned int, int)); |
35f5886e FF |
554 | |
555 | static struct type * | |
1ab3bf1b | 556 | decode_fund_type PARAMS ((unsigned int)); |
35f5886e FF |
557 | |
558 | static char * | |
1ab3bf1b | 559 | create_name PARAMS ((char *, struct obstack *)); |
35f5886e | 560 | |
35f5886e | 561 | static struct type * |
13b5a7ff | 562 | lookup_utype PARAMS ((DIE_REF)); |
35f5886e FF |
563 | |
564 | static struct type * | |
13b5a7ff | 565 | alloc_utype PARAMS ((DIE_REF, struct type *)); |
35f5886e FF |
566 | |
567 | static struct symbol * | |
1ab3bf1b | 568 | new_symbol PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e | 569 | |
95ff889e FF |
570 | static void |
571 | synthesize_typedef PARAMS ((struct dieinfo *, struct objfile *, | |
572 | struct type *)); | |
573 | ||
35f5886e | 574 | static int |
1ab3bf1b | 575 | locval PARAMS ((char *)); |
35f5886e FF |
576 | |
577 | static void | |
1ab3bf1b JG |
578 | record_minimal_symbol PARAMS ((char *, CORE_ADDR, enum minimal_symbol_type, |
579 | struct objfile *)); | |
35f5886e | 580 | |
95ff889e FF |
581 | static void |
582 | set_cu_language PARAMS ((struct dieinfo *)); | |
583 | ||
bf229b4e FF |
584 | static struct type * |
585 | dwarf_fundamental_type PARAMS ((struct objfile *, int)); | |
586 | ||
587 | ||
588 | /* | |
589 | ||
590 | LOCAL FUNCTION | |
591 | ||
592 | dwarf_fundamental_type -- lookup or create a fundamental type | |
593 | ||
594 | SYNOPSIS | |
595 | ||
596 | struct type * | |
597 | dwarf_fundamental_type (struct objfile *objfile, int typeid) | |
598 | ||
599 | DESCRIPTION | |
600 | ||
601 | DWARF version 1 doesn't supply any fundamental type information, | |
602 | so gdb has to construct such types. It has a fixed number of | |
603 | fundamental types that it knows how to construct, which is the | |
604 | union of all types that it knows how to construct for all languages | |
605 | that it knows about. These are enumerated in gdbtypes.h. | |
606 | ||
607 | As an example, assume we find a DIE that references a DWARF | |
608 | fundamental type of FT_integer. We first look in the ftypes | |
609 | array to see if we already have such a type, indexed by the | |
610 | gdb internal value of FT_INTEGER. If so, we simply return a | |
611 | pointer to that type. If not, then we ask an appropriate | |
612 | language dependent routine to create a type FT_INTEGER, using | |
613 | defaults reasonable for the current target machine, and install | |
614 | that type in ftypes for future reference. | |
615 | ||
616 | RETURNS | |
617 | ||
618 | Pointer to a fundamental type. | |
619 | ||
620 | */ | |
621 | ||
622 | static struct type * | |
623 | dwarf_fundamental_type (objfile, typeid) | |
624 | struct objfile *objfile; | |
625 | int typeid; | |
626 | { | |
627 | if (typeid < 0 || typeid >= FT_NUM_MEMBERS) | |
628 | { | |
629 | error ("internal error - invalid fundamental type id %d", typeid); | |
630 | } | |
631 | ||
632 | /* Look for this particular type in the fundamental type vector. If one is | |
633 | not found, create and install one appropriate for the current language | |
634 | and the current target machine. */ | |
635 | ||
636 | if (ftypes[typeid] == NULL) | |
637 | { | |
638 | ftypes[typeid] = cu_language_defn -> la_fund_type(objfile, typeid); | |
639 | } | |
640 | ||
641 | return (ftypes[typeid]); | |
642 | } | |
643 | ||
95ff889e FF |
644 | /* |
645 | ||
646 | LOCAL FUNCTION | |
647 | ||
648 | set_cu_language -- set local copy of language for compilation unit | |
649 | ||
650 | SYNOPSIS | |
651 | ||
652 | void | |
653 | set_cu_language (struct dieinfo *dip) | |
654 | ||
655 | DESCRIPTION | |
656 | ||
657 | Decode the language attribute for a compilation unit DIE and | |
658 | remember what the language was. We use this at various times | |
659 | when processing DIE's for a given compilation unit. | |
660 | ||
661 | RETURNS | |
662 | ||
663 | No return value. | |
664 | ||
665 | */ | |
666 | ||
667 | static void | |
668 | set_cu_language (dip) | |
669 | struct dieinfo *dip; | |
670 | { | |
671 | switch (dip -> at_language) | |
672 | { | |
673 | case LANG_C89: | |
674 | case LANG_C: | |
675 | cu_language = language_c; | |
676 | break; | |
677 | case LANG_C_PLUS_PLUS: | |
678 | cu_language = language_cplus; | |
679 | break; | |
19cfe25d | 680 | /* start-sanitize-chill */ |
e58de8a2 FF |
681 | case LANG_CHILL: |
682 | cu_language = language_chill; | |
683 | break; | |
19cfe25d | 684 | /* end-sanitize-chill */ |
e58de8a2 FF |
685 | case LANG_MODULA2: |
686 | cu_language = language_m2; | |
687 | break; | |
95ff889e FF |
688 | case LANG_ADA83: |
689 | case LANG_COBOL74: | |
690 | case LANG_COBOL85: | |
691 | case LANG_FORTRAN77: | |
692 | case LANG_FORTRAN90: | |
693 | case LANG_PASCAL83: | |
2e4964ad | 694 | /* We don't know anything special about these yet. */ |
95ff889e FF |
695 | cu_language = language_unknown; |
696 | break; | |
2e4964ad FF |
697 | default: |
698 | /* If no at_language, try to deduce one from the filename */ | |
699 | cu_language = deduce_language_from_filename (dip -> at_name); | |
700 | break; | |
95ff889e | 701 | } |
bf229b4e | 702 | cu_language_defn = language_def (cu_language); |
95ff889e FF |
703 | } |
704 | ||
35f5886e FF |
705 | /* |
706 | ||
707 | GLOBAL FUNCTION | |
708 | ||
709 | dwarf_build_psymtabs -- build partial symtabs from DWARF debug info | |
710 | ||
711 | SYNOPSIS | |
712 | ||
d5931d79 | 713 | void dwarf_build_psymtabs (struct objfile *objfile, |
2670f34d | 714 | struct section_offsets *section_offsets, |
d5931d79 JG |
715 | int mainline, file_ptr dbfoff, unsigned int dbfsize, |
716 | file_ptr lnoffset, unsigned int lnsize) | |
35f5886e FF |
717 | |
718 | DESCRIPTION | |
719 | ||
720 | This function is called upon to build partial symtabs from files | |
721 | containing DIE's (Dwarf Information Entries) and DWARF line numbers. | |
722 | ||
d5931d79 | 723 | It is passed a bfd* containing the DIES |
35f5886e FF |
724 | and line number information, the corresponding filename for that |
725 | file, a base address for relocating the symbols, a flag indicating | |
726 | whether or not this debugging information is from a "main symbol | |
727 | table" rather than a shared library or dynamically linked file, | |
728 | and file offset/size pairs for the DIE information and line number | |
729 | information. | |
730 | ||
731 | RETURNS | |
732 | ||
733 | No return value. | |
734 | ||
735 | */ | |
736 | ||
737 | void | |
d5931d79 JG |
738 | dwarf_build_psymtabs (objfile, section_offsets, mainline, dbfoff, dbfsize, |
739 | lnoffset, lnsize) | |
740 | struct objfile *objfile; | |
2670f34d | 741 | struct section_offsets *section_offsets; |
1ab3bf1b | 742 | int mainline; |
d5931d79 | 743 | file_ptr dbfoff; |
4090fe1c | 744 | unsigned int dbfsize; |
d5931d79 | 745 | file_ptr lnoffset; |
1ab3bf1b | 746 | unsigned int lnsize; |
35f5886e | 747 | { |
d5931d79 | 748 | bfd *abfd = objfile->obfd; |
35f5886e FF |
749 | struct cleanup *back_to; |
750 | ||
95967e73 | 751 | current_objfile = objfile; |
4090fe1c | 752 | dbsize = dbfsize; |
35f5886e FF |
753 | dbbase = xmalloc (dbsize); |
754 | dbroff = 0; | |
d5931d79 JG |
755 | if ((bfd_seek (abfd, dbfoff, L_SET) != 0) || |
756 | (bfd_read (dbbase, dbsize, 1, abfd) != dbsize)) | |
35f5886e FF |
757 | { |
758 | free (dbbase); | |
d5931d79 | 759 | error ("can't read DWARF data from '%s'", bfd_get_filename (abfd)); |
35f5886e FF |
760 | } |
761 | back_to = make_cleanup (free, dbbase); | |
762 | ||
763 | /* If we are reinitializing, or if we have never loaded syms yet, init. | |
764 | Since we have no idea how many DIES we are looking at, we just guess | |
765 | some arbitrary value. */ | |
766 | ||
13b5a7ff FF |
767 | if (mainline || objfile -> global_psymbols.size == 0 || |
768 | objfile -> static_psymbols.size == 0) | |
35f5886e | 769 | { |
1ab3bf1b | 770 | init_psymbol_list (objfile, 1024); |
35f5886e FF |
771 | } |
772 | ||
84ffdec2 | 773 | /* Save the relocation factor where everybody can see it. */ |
f8b76e70 | 774 | |
2670f34d JG |
775 | base_section_offsets = section_offsets; |
776 | baseaddr = ANOFFSET (section_offsets, 0); | |
f8b76e70 | 777 | |
35f5886e FF |
778 | /* Follow the compilation unit sibling chain, building a partial symbol |
779 | table entry for each one. Save enough information about each compilation | |
780 | unit to locate the full DWARF information later. */ | |
781 | ||
d5931d79 | 782 | scan_compilation_units (dbbase, dbbase + dbsize, dbfoff, lnoffset, objfile); |
35f5886e | 783 | |
35f5886e | 784 | do_cleanups (back_to); |
95967e73 | 785 | current_objfile = NULL; |
35f5886e FF |
786 | } |
787 | ||
788 | ||
789 | /* | |
790 | ||
791 | LOCAL FUNCTION | |
792 | ||
1ab3bf1b | 793 | record_minimal_symbol -- add entry to gdb's minimal symbol table |
35f5886e FF |
794 | |
795 | SYNOPSIS | |
796 | ||
1ab3bf1b JG |
797 | static void record_minimal_symbol (char *name, CORE_ADDR address, |
798 | enum minimal_symbol_type ms_type, | |
799 | struct objfile *objfile) | |
35f5886e FF |
800 | |
801 | DESCRIPTION | |
802 | ||
803 | Given a pointer to the name of a symbol that should be added to the | |
1ab3bf1b | 804 | minimal symbol table, and the address associated with that |
35f5886e | 805 | symbol, records this information for later use in building the |
1ab3bf1b | 806 | minimal symbol table. |
35f5886e | 807 | |
35f5886e FF |
808 | */ |
809 | ||
810 | static void | |
1ab3bf1b JG |
811 | record_minimal_symbol (name, address, ms_type, objfile) |
812 | char *name; | |
813 | CORE_ADDR address; | |
814 | enum minimal_symbol_type ms_type; | |
815 | struct objfile *objfile; | |
35f5886e | 816 | { |
1ab3bf1b JG |
817 | name = obsavestring (name, strlen (name), &objfile -> symbol_obstack); |
818 | prim_record_minimal_symbol (name, address, ms_type); | |
35f5886e FF |
819 | } |
820 | ||
821 | /* | |
822 | ||
35f5886e FF |
823 | LOCAL FUNCTION |
824 | ||
825 | read_lexical_block_scope -- process all dies in a lexical block | |
826 | ||
827 | SYNOPSIS | |
828 | ||
829 | static void read_lexical_block_scope (struct dieinfo *dip, | |
830 | char *thisdie, char *enddie) | |
831 | ||
832 | DESCRIPTION | |
833 | ||
834 | Process all the DIES contained within a lexical block scope. | |
835 | Start a new scope, process the dies, and then close the scope. | |
836 | ||
837 | */ | |
838 | ||
839 | static void | |
1ab3bf1b JG |
840 | read_lexical_block_scope (dip, thisdie, enddie, objfile) |
841 | struct dieinfo *dip; | |
842 | char *thisdie; | |
843 | char *enddie; | |
844 | struct objfile *objfile; | |
35f5886e | 845 | { |
4d315a07 FF |
846 | register struct context_stack *new; |
847 | ||
4ed3a9ea | 848 | push_context (0, dip -> at_low_pc); |
13b5a7ff | 849 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 FF |
850 | new = pop_context (); |
851 | if (local_symbols != NULL) | |
852 | { | |
853 | finish_block (0, &local_symbols, new -> old_blocks, new -> start_addr, | |
1ab3bf1b | 854 | dip -> at_high_pc, objfile); |
4d315a07 FF |
855 | } |
856 | local_symbols = new -> locals; | |
35f5886e FF |
857 | } |
858 | ||
859 | /* | |
860 | ||
861 | LOCAL FUNCTION | |
862 | ||
863 | lookup_utype -- look up a user defined type from die reference | |
864 | ||
865 | SYNOPSIS | |
866 | ||
13b5a7ff | 867 | static type *lookup_utype (DIE_REF die_ref) |
35f5886e FF |
868 | |
869 | DESCRIPTION | |
870 | ||
871 | Given a DIE reference, lookup the user defined type associated with | |
872 | that DIE, if it has been registered already. If not registered, then | |
873 | return NULL. Alloc_utype() can be called to register an empty | |
874 | type for this reference, which will be filled in later when the | |
875 | actual referenced DIE is processed. | |
876 | */ | |
877 | ||
878 | static struct type * | |
13b5a7ff FF |
879 | lookup_utype (die_ref) |
880 | DIE_REF die_ref; | |
35f5886e FF |
881 | { |
882 | struct type *type = NULL; | |
883 | int utypeidx; | |
884 | ||
13b5a7ff | 885 | utypeidx = (die_ref - dbroff) / 4; |
35f5886e FF |
886 | if ((utypeidx < 0) || (utypeidx >= numutypes)) |
887 | { | |
51b80b00 | 888 | complain (&bad_die_ref, DIE_ID, DIE_NAME); |
35f5886e FF |
889 | } |
890 | else | |
891 | { | |
892 | type = *(utypes + utypeidx); | |
893 | } | |
894 | return (type); | |
895 | } | |
896 | ||
897 | ||
898 | /* | |
899 | ||
900 | LOCAL FUNCTION | |
901 | ||
902 | alloc_utype -- add a user defined type for die reference | |
903 | ||
904 | SYNOPSIS | |
905 | ||
13b5a7ff | 906 | static type *alloc_utype (DIE_REF die_ref, struct type *utypep) |
35f5886e FF |
907 | |
908 | DESCRIPTION | |
909 | ||
13b5a7ff | 910 | Given a die reference DIE_REF, and a possible pointer to a user |
35f5886e FF |
911 | defined type UTYPEP, register that this reference has a user |
912 | defined type and either use the specified type in UTYPEP or | |
913 | make a new empty type that will be filled in later. | |
914 | ||
915 | We should only be called after calling lookup_utype() to verify that | |
13b5a7ff | 916 | there is not currently a type registered for DIE_REF. |
35f5886e FF |
917 | */ |
918 | ||
919 | static struct type * | |
13b5a7ff FF |
920 | alloc_utype (die_ref, utypep) |
921 | DIE_REF die_ref; | |
1ab3bf1b | 922 | struct type *utypep; |
35f5886e FF |
923 | { |
924 | struct type **typep; | |
925 | int utypeidx; | |
926 | ||
13b5a7ff | 927 | utypeidx = (die_ref - dbroff) / 4; |
35f5886e FF |
928 | typep = utypes + utypeidx; |
929 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
930 | { | |
bf229b4e | 931 | utypep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
51b80b00 | 932 | complain (&bad_die_ref, DIE_ID, DIE_NAME); |
35f5886e FF |
933 | } |
934 | else if (*typep != NULL) | |
935 | { | |
936 | utypep = *typep; | |
51b80b00 | 937 | complain (&dup_user_type_allocation, DIE_ID, DIE_NAME); |
35f5886e FF |
938 | } |
939 | else | |
940 | { | |
941 | if (utypep == NULL) | |
942 | { | |
8050a57b | 943 | utypep = alloc_type (current_objfile); |
35f5886e FF |
944 | } |
945 | *typep = utypep; | |
946 | } | |
947 | return (utypep); | |
948 | } | |
949 | ||
950 | /* | |
951 | ||
952 | LOCAL FUNCTION | |
953 | ||
954 | decode_die_type -- return a type for a specified die | |
955 | ||
956 | SYNOPSIS | |
957 | ||
958 | static struct type *decode_die_type (struct dieinfo *dip) | |
959 | ||
960 | DESCRIPTION | |
961 | ||
962 | Given a pointer to a die information structure DIP, decode the | |
963 | type of the die and return a pointer to the decoded type. All | |
964 | dies without specific types default to type int. | |
965 | */ | |
966 | ||
967 | static struct type * | |
1ab3bf1b JG |
968 | decode_die_type (dip) |
969 | struct dieinfo *dip; | |
35f5886e FF |
970 | { |
971 | struct type *type = NULL; | |
972 | ||
973 | if (dip -> at_fund_type != 0) | |
974 | { | |
975 | type = decode_fund_type (dip -> at_fund_type); | |
976 | } | |
977 | else if (dip -> at_mod_fund_type != NULL) | |
978 | { | |
979 | type = decode_mod_fund_type (dip -> at_mod_fund_type); | |
980 | } | |
981 | else if (dip -> at_user_def_type) | |
982 | { | |
983 | if ((type = lookup_utype (dip -> at_user_def_type)) == NULL) | |
984 | { | |
985 | type = alloc_utype (dip -> at_user_def_type, NULL); | |
986 | } | |
987 | } | |
988 | else if (dip -> at_mod_u_d_type) | |
989 | { | |
990 | type = decode_mod_u_d_type (dip -> at_mod_u_d_type); | |
991 | } | |
992 | else | |
993 | { | |
bf229b4e | 994 | type = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
35f5886e FF |
995 | } |
996 | return (type); | |
997 | } | |
998 | ||
999 | /* | |
1000 | ||
1001 | LOCAL FUNCTION | |
1002 | ||
1003 | struct_type -- compute and return the type for a struct or union | |
1004 | ||
1005 | SYNOPSIS | |
1006 | ||
1007 | static struct type *struct_type (struct dieinfo *dip, char *thisdie, | |
8b5b6fae | 1008 | char *enddie, struct objfile *objfile) |
35f5886e FF |
1009 | |
1010 | DESCRIPTION | |
1011 | ||
1012 | Given pointer to a die information structure for a die which | |
715cafcb FF |
1013 | defines a union or structure (and MUST define one or the other), |
1014 | and pointers to the raw die data that define the range of dies which | |
1015 | define the members, compute and return the user defined type for the | |
1016 | structure or union. | |
35f5886e FF |
1017 | */ |
1018 | ||
1019 | static struct type * | |
1ab3bf1b JG |
1020 | struct_type (dip, thisdie, enddie, objfile) |
1021 | struct dieinfo *dip; | |
1022 | char *thisdie; | |
1023 | char *enddie; | |
1024 | struct objfile *objfile; | |
35f5886e FF |
1025 | { |
1026 | struct type *type; | |
1027 | struct nextfield { | |
1028 | struct nextfield *next; | |
1029 | struct field field; | |
1030 | }; | |
1031 | struct nextfield *list = NULL; | |
1032 | struct nextfield *new; | |
1033 | int nfields = 0; | |
1034 | int n; | |
1035 | char *tpart1; | |
35f5886e | 1036 | struct dieinfo mbr; |
8b5b6fae | 1037 | char *nextdie; |
a8a69e63 | 1038 | #if !BITS_BIG_ENDIAN |
50055e94 | 1039 | int anonymous_size; |
a8a69e63 | 1040 | #endif |
35f5886e | 1041 | |
13b5a7ff | 1042 | if ((type = lookup_utype (dip -> die_ref)) == NULL) |
35f5886e | 1043 | { |
5edf98d7 | 1044 | /* No forward references created an empty type, so install one now */ |
13b5a7ff | 1045 | type = alloc_utype (dip -> die_ref, NULL); |
35f5886e | 1046 | } |
a3723a43 | 1047 | INIT_CPLUS_SPECIFIC(type); |
13b5a7ff | 1048 | switch (dip -> die_tag) |
35f5886e | 1049 | { |
95ff889e FF |
1050 | case TAG_class_type: |
1051 | TYPE_CODE (type) = TYPE_CODE_CLASS; | |
1052 | tpart1 = "class"; | |
1053 | break; | |
715cafcb | 1054 | case TAG_structure_type: |
5edf98d7 | 1055 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
715cafcb FF |
1056 | tpart1 = "struct"; |
1057 | break; | |
1058 | case TAG_union_type: | |
1059 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
1060 | tpart1 = "union"; | |
1061 | break; | |
1062 | default: | |
1063 | /* Should never happen */ | |
1064 | TYPE_CODE (type) = TYPE_CODE_UNDEF; | |
1065 | tpart1 = "???"; | |
51b80b00 | 1066 | complain (&missing_tag, DIE_ID, DIE_NAME); |
715cafcb | 1067 | break; |
35f5886e | 1068 | } |
5edf98d7 FF |
1069 | /* Some compilers try to be helpful by inventing "fake" names for |
1070 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1071 | Thanks, but no thanks... */ | |
715cafcb FF |
1072 | if (dip -> at_name != NULL |
1073 | && *dip -> at_name != '~' | |
1074 | && *dip -> at_name != '.') | |
35f5886e | 1075 | { |
95967e73 | 1076 | TYPE_NAME (type) = obconcat (&objfile -> type_obstack, |
1ab3bf1b | 1077 | tpart1, " ", dip -> at_name); |
35f5886e | 1078 | } |
50055e94 FF |
1079 | /* Use whatever size is known. Zero is a valid size. We might however |
1080 | wish to check has_at_byte_size to make sure that some byte size was | |
1081 | given explicitly, but DWARF doesn't specify that explicit sizes of | |
1082 | zero have to present, so complaining about missing sizes should | |
1083 | probably not be the default. */ | |
1084 | TYPE_LENGTH (type) = dip -> at_byte_size; | |
13b5a7ff | 1085 | thisdie += dip -> die_length; |
35f5886e FF |
1086 | while (thisdie < enddie) |
1087 | { | |
95967e73 FF |
1088 | basicdieinfo (&mbr, thisdie, objfile); |
1089 | completedieinfo (&mbr, objfile); | |
13b5a7ff | 1090 | if (mbr.die_length <= SIZEOF_DIE_LENGTH) |
35f5886e FF |
1091 | { |
1092 | break; | |
1093 | } | |
8b5b6fae FF |
1094 | else if (mbr.at_sibling != 0) |
1095 | { | |
1096 | nextdie = dbbase + mbr.at_sibling - dbroff; | |
1097 | } | |
1098 | else | |
1099 | { | |
13b5a7ff | 1100 | nextdie = thisdie + mbr.die_length; |
8b5b6fae | 1101 | } |
13b5a7ff | 1102 | switch (mbr.die_tag) |
35f5886e FF |
1103 | { |
1104 | case TAG_member: | |
1105 | /* Get space to record the next field's data. */ | |
1106 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1107 | new -> next = list; | |
1108 | list = new; | |
1109 | /* Save the data. */ | |
50e0dc41 FF |
1110 | list -> field.name = |
1111 | obsavestring (mbr.at_name, strlen (mbr.at_name), | |
1112 | &objfile -> type_obstack); | |
35f5886e FF |
1113 | list -> field.type = decode_die_type (&mbr); |
1114 | list -> field.bitpos = 8 * locval (mbr.at_location); | |
4db8e515 FF |
1115 | /* Handle bit fields. */ |
1116 | list -> field.bitsize = mbr.at_bit_size; | |
1117 | #if BITS_BIG_ENDIAN | |
1118 | /* For big endian bits, the at_bit_offset gives the additional | |
1119 | bit offset from the MSB of the containing anonymous object to | |
1120 | the MSB of the field. We don't have to do anything special | |
1121 | since we don't need to know the size of the anonymous object. */ | |
1122 | list -> field.bitpos += mbr.at_bit_offset; | |
1123 | #else | |
1124 | /* For little endian bits, we need to have a non-zero at_bit_size, | |
1125 | so that we know we are in fact dealing with a bitfield. Compute | |
1126 | the bit offset to the MSB of the anonymous object, subtract off | |
1127 | the number of bits from the MSB of the field to the MSB of the | |
1128 | object, and then subtract off the number of bits of the field | |
1129 | itself. The result is the bit offset of the LSB of the field. */ | |
1130 | if (mbr.at_bit_size > 0) | |
1131 | { | |
50055e94 FF |
1132 | if (mbr.has_at_byte_size) |
1133 | { | |
1134 | /* The size of the anonymous object containing the bit field | |
1135 | is explicit, so use the indicated size (in bytes). */ | |
1136 | anonymous_size = mbr.at_byte_size; | |
1137 | } | |
1138 | else | |
1139 | { | |
1140 | /* The size of the anonymous object containing the bit field | |
1141 | matches the size of an object of the bit field's type. | |
1142 | DWARF allows at_byte_size to be left out in such cases, | |
1143 | as a debug information size optimization. */ | |
1144 | anonymous_size = TYPE_LENGTH (list -> field.type); | |
1145 | } | |
4db8e515 | 1146 | list -> field.bitpos += |
50055e94 | 1147 | anonymous_size * 8 - mbr.at_bit_offset - mbr.at_bit_size; |
4db8e515 FF |
1148 | } |
1149 | #endif | |
35f5886e FF |
1150 | nfields++; |
1151 | break; | |
1152 | default: | |
8b5b6fae | 1153 | process_dies (thisdie, nextdie, objfile); |
35f5886e FF |
1154 | break; |
1155 | } | |
8b5b6fae | 1156 | thisdie = nextdie; |
35f5886e | 1157 | } |
5edf98d7 FF |
1158 | /* Now create the vector of fields, and record how big it is. We may |
1159 | not even have any fields, if this DIE was generated due to a reference | |
1160 | to an anonymous structure or union. In this case, TYPE_FLAG_STUB is | |
1161 | set, which clues gdb in to the fact that it needs to search elsewhere | |
1162 | for the full structure definition. */ | |
1163 | if (nfields == 0) | |
35f5886e | 1164 | { |
5edf98d7 FF |
1165 | TYPE_FLAGS (type) |= TYPE_FLAG_STUB; |
1166 | } | |
1167 | else | |
1168 | { | |
1169 | TYPE_NFIELDS (type) = nfields; | |
1170 | TYPE_FIELDS (type) = (struct field *) | |
dac9734e | 1171 | TYPE_ALLOC (type, sizeof (struct field) * nfields); |
5edf98d7 FF |
1172 | /* Copy the saved-up fields into the field vector. */ |
1173 | for (n = nfields; list; list = list -> next) | |
1174 | { | |
1175 | TYPE_FIELD (type, --n) = list -> field; | |
1176 | } | |
1177 | } | |
35f5886e FF |
1178 | return (type); |
1179 | } | |
1180 | ||
1181 | /* | |
1182 | ||
1183 | LOCAL FUNCTION | |
1184 | ||
1185 | read_structure_scope -- process all dies within struct or union | |
1186 | ||
1187 | SYNOPSIS | |
1188 | ||
1189 | static void read_structure_scope (struct dieinfo *dip, | |
8b5b6fae | 1190 | char *thisdie, char *enddie, struct objfile *objfile) |
35f5886e FF |
1191 | |
1192 | DESCRIPTION | |
1193 | ||
1194 | Called when we find the DIE that starts a structure or union | |
1195 | scope (definition) to process all dies that define the members | |
1196 | of the structure or union. DIP is a pointer to the die info | |
1197 | struct for the DIE that names the structure or union. | |
1198 | ||
1199 | NOTES | |
1200 | ||
1201 | Note that we need to call struct_type regardless of whether or not | |
84ce6717 FF |
1202 | the DIE has an at_name attribute, since it might be an anonymous |
1203 | structure or union. This gets the type entered into our set of | |
1204 | user defined types. | |
1205 | ||
1206 | However, if the structure is incomplete (an opaque struct/union) | |
1207 | then suppress creating a symbol table entry for it since gdb only | |
1208 | wants to find the one with the complete definition. Note that if | |
1209 | it is complete, we just call new_symbol, which does it's own | |
1210 | checking about whether the struct/union is anonymous or not (and | |
1211 | suppresses creating a symbol table entry itself). | |
1212 | ||
35f5886e FF |
1213 | */ |
1214 | ||
1215 | static void | |
1ab3bf1b JG |
1216 | read_structure_scope (dip, thisdie, enddie, objfile) |
1217 | struct dieinfo *dip; | |
1218 | char *thisdie; | |
1219 | char *enddie; | |
1220 | struct objfile *objfile; | |
35f5886e FF |
1221 | { |
1222 | struct type *type; | |
1223 | struct symbol *sym; | |
1224 | ||
8b5b6fae | 1225 | type = struct_type (dip, thisdie, enddie, objfile); |
84ce6717 | 1226 | if (!(TYPE_FLAGS (type) & TYPE_FLAG_STUB)) |
35f5886e | 1227 | { |
95ff889e FF |
1228 | sym = new_symbol (dip, objfile); |
1229 | if (sym != NULL) | |
84ce6717 FF |
1230 | { |
1231 | SYMBOL_TYPE (sym) = type; | |
95ff889e FF |
1232 | if (cu_language == language_cplus) |
1233 | { | |
1234 | synthesize_typedef (dip, objfile, type); | |
1235 | } | |
84ce6717 | 1236 | } |
35f5886e FF |
1237 | } |
1238 | } | |
1239 | ||
1240 | /* | |
1241 | ||
1242 | LOCAL FUNCTION | |
1243 | ||
1244 | decode_array_element_type -- decode type of the array elements | |
1245 | ||
1246 | SYNOPSIS | |
1247 | ||
1248 | static struct type *decode_array_element_type (char *scan, char *end) | |
1249 | ||
1250 | DESCRIPTION | |
1251 | ||
1252 | As the last step in decoding the array subscript information for an | |
1253 | array DIE, we need to decode the type of the array elements. We are | |
1254 | passed a pointer to this last part of the subscript information and | |
1255 | must return the appropriate type. If the type attribute is not | |
1256 | recognized, just warn about the problem and return type int. | |
1257 | */ | |
1258 | ||
1259 | static struct type * | |
84ffdec2 | 1260 | decode_array_element_type (scan) |
1ab3bf1b | 1261 | char *scan; |
35f5886e FF |
1262 | { |
1263 | struct type *typep; | |
13b5a7ff FF |
1264 | DIE_REF die_ref; |
1265 | unsigned short attribute; | |
35f5886e | 1266 | unsigned short fundtype; |
13b5a7ff | 1267 | int nbytes; |
35f5886e | 1268 | |
13b5a7ff FF |
1269 | attribute = target_to_host (scan, SIZEOF_ATTRIBUTE, GET_UNSIGNED, |
1270 | current_objfile); | |
1271 | scan += SIZEOF_ATTRIBUTE; | |
1272 | if ((nbytes = attribute_size (attribute)) == -1) | |
1273 | { | |
51b80b00 | 1274 | complain (&bad_array_element_type, DIE_ID, DIE_NAME, attribute); |
bf229b4e | 1275 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff FF |
1276 | } |
1277 | else | |
1278 | { | |
1279 | switch (attribute) | |
1280 | { | |
1281 | case AT_fund_type: | |
1282 | fundtype = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1283 | current_objfile); | |
1284 | typep = decode_fund_type (fundtype); | |
1285 | break; | |
1286 | case AT_mod_fund_type: | |
1287 | typep = decode_mod_fund_type (scan); | |
1288 | break; | |
1289 | case AT_user_def_type: | |
1290 | die_ref = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1291 | current_objfile); | |
1292 | if ((typep = lookup_utype (die_ref)) == NULL) | |
1293 | { | |
1294 | typep = alloc_utype (die_ref, NULL); | |
1295 | } | |
1296 | break; | |
1297 | case AT_mod_u_d_type: | |
1298 | typep = decode_mod_u_d_type (scan); | |
1299 | break; | |
1300 | default: | |
51b80b00 | 1301 | complain (&bad_array_element_type, DIE_ID, DIE_NAME, attribute); |
bf229b4e | 1302 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff FF |
1303 | break; |
1304 | } | |
35f5886e FF |
1305 | } |
1306 | return (typep); | |
1307 | } | |
1308 | ||
1309 | /* | |
1310 | ||
1311 | LOCAL FUNCTION | |
1312 | ||
85f0a848 | 1313 | decode_subscript_data_item -- decode array subscript item |
35f5886e FF |
1314 | |
1315 | SYNOPSIS | |
1316 | ||
85f0a848 FF |
1317 | static struct type * |
1318 | decode_subscript_data_item (char *scan, char *end) | |
35f5886e FF |
1319 | |
1320 | DESCRIPTION | |
1321 | ||
1322 | The array subscripts and the data type of the elements of an | |
1323 | array are described by a list of data items, stored as a block | |
1324 | of contiguous bytes. There is a data item describing each array | |
1325 | dimension, and a final data item describing the element type. | |
1326 | The data items are ordered the same as their appearance in the | |
1327 | source (I.E. leftmost dimension first, next to leftmost second, | |
1328 | etc). | |
1329 | ||
85f0a848 FF |
1330 | The data items describing each array dimension consist of four |
1331 | parts: (1) a format specifier, (2) type type of the subscript | |
1332 | index, (3) a description of the low bound of the array dimension, | |
1333 | and (4) a description of the high bound of the array dimension. | |
1334 | ||
1335 | The last data item is the description of the type of each of | |
1336 | the array elements. | |
1337 | ||
35f5886e | 1338 | We are passed a pointer to the start of the block of bytes |
85f0a848 FF |
1339 | containing the remaining data items, and a pointer to the first |
1340 | byte past the data. This function recursively decodes the | |
1341 | remaining data items and returns a type. | |
1342 | ||
1343 | If we somehow fail to decode some data, we complain about it | |
1344 | and return a type "array of int". | |
35f5886e FF |
1345 | |
1346 | BUGS | |
1347 | FIXME: This code only implements the forms currently used | |
1348 | by the AT&T and GNU C compilers. | |
1349 | ||
1350 | The end pointer is supplied for error checking, maybe we should | |
1351 | use it for that... | |
1352 | */ | |
1353 | ||
1354 | static struct type * | |
85f0a848 | 1355 | decode_subscript_data_item (scan, end) |
1ab3bf1b JG |
1356 | char *scan; |
1357 | char *end; | |
35f5886e | 1358 | { |
85f0a848 FF |
1359 | struct type *typep = NULL; /* Array type we are building */ |
1360 | struct type *nexttype; /* Type of each element (may be array) */ | |
1361 | struct type *indextype; /* Type of this index */ | |
a8a69e63 | 1362 | struct type *rangetype; |
13b5a7ff FF |
1363 | unsigned int format; |
1364 | unsigned short fundtype; | |
1365 | unsigned long lowbound; | |
1366 | unsigned long highbound; | |
1367 | int nbytes; | |
35f5886e | 1368 | |
13b5a7ff FF |
1369 | format = target_to_host (scan, SIZEOF_FORMAT_SPECIFIER, GET_UNSIGNED, |
1370 | current_objfile); | |
1371 | scan += SIZEOF_FORMAT_SPECIFIER; | |
35f5886e FF |
1372 | switch (format) |
1373 | { | |
1374 | case FMT_ET: | |
84ffdec2 | 1375 | typep = decode_array_element_type (scan); |
35f5886e FF |
1376 | break; |
1377 | case FMT_FT_C_C: | |
13b5a7ff FF |
1378 | fundtype = target_to_host (scan, SIZEOF_FMT_FT, GET_UNSIGNED, |
1379 | current_objfile); | |
85f0a848 | 1380 | indextype = decode_fund_type (fundtype); |
13b5a7ff | 1381 | scan += SIZEOF_FMT_FT; |
160be0de FF |
1382 | nbytes = TARGET_FT_LONG_SIZE (current_objfile); |
1383 | lowbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1384 | scan += nbytes; | |
1385 | highbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1386 | scan += nbytes; | |
85f0a848 FF |
1387 | nexttype = decode_subscript_data_item (scan, end); |
1388 | if (nexttype == NULL) | |
35f5886e | 1389 | { |
85f0a848 | 1390 | /* Munged subscript data or other problem, fake it. */ |
51b80b00 | 1391 | complain (&subscript_data_items, DIE_ID, DIE_NAME); |
85f0a848 FF |
1392 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1393 | } | |
a8a69e63 FF |
1394 | rangetype = create_range_type ((struct type *) NULL, indextype, |
1395 | lowbound, highbound); | |
1396 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
35f5886e FF |
1397 | break; |
1398 | case FMT_FT_C_X: | |
1399 | case FMT_FT_X_C: | |
1400 | case FMT_FT_X_X: | |
1401 | case FMT_UT_C_C: | |
1402 | case FMT_UT_C_X: | |
1403 | case FMT_UT_X_C: | |
1404 | case FMT_UT_X_X: | |
51b80b00 | 1405 | complain (&unhandled_array_subscript_format, DIE_ID, DIE_NAME, format); |
a8a69e63 FF |
1406 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1407 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1408 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
35f5886e FF |
1409 | break; |
1410 | default: | |
51b80b00 | 1411 | complain (&unknown_array_subscript_format, DIE_ID, DIE_NAME, format); |
a8a69e63 FF |
1412 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1413 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1414 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
35f5886e FF |
1415 | break; |
1416 | } | |
1417 | return (typep); | |
1418 | } | |
1419 | ||
1420 | /* | |
1421 | ||
1422 | LOCAL FUNCTION | |
1423 | ||
4d315a07 | 1424 | dwarf_read_array_type -- read TAG_array_type DIE |
35f5886e FF |
1425 | |
1426 | SYNOPSIS | |
1427 | ||
4d315a07 | 1428 | static void dwarf_read_array_type (struct dieinfo *dip) |
35f5886e FF |
1429 | |
1430 | DESCRIPTION | |
1431 | ||
1432 | Extract all information from a TAG_array_type DIE and add to | |
1433 | the user defined type vector. | |
1434 | */ | |
1435 | ||
1436 | static void | |
1ab3bf1b JG |
1437 | dwarf_read_array_type (dip) |
1438 | struct dieinfo *dip; | |
35f5886e FF |
1439 | { |
1440 | struct type *type; | |
af213624 | 1441 | struct type *utype; |
35f5886e FF |
1442 | char *sub; |
1443 | char *subend; | |
13b5a7ff FF |
1444 | unsigned short blocksz; |
1445 | int nbytes; | |
35f5886e FF |
1446 | |
1447 | if (dip -> at_ordering != ORD_row_major) | |
1448 | { | |
1449 | /* FIXME: Can gdb even handle column major arrays? */ | |
51b80b00 | 1450 | complain (¬_row_major, DIE_ID, DIE_NAME); |
35f5886e FF |
1451 | } |
1452 | if ((sub = dip -> at_subscr_data) != NULL) | |
1453 | { | |
13b5a7ff FF |
1454 | nbytes = attribute_size (AT_subscr_data); |
1455 | blocksz = target_to_host (sub, nbytes, GET_UNSIGNED, current_objfile); | |
1456 | subend = sub + nbytes + blocksz; | |
1457 | sub += nbytes; | |
85f0a848 FF |
1458 | type = decode_subscript_data_item (sub, subend); |
1459 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) | |
35f5886e | 1460 | { |
85f0a848 FF |
1461 | /* Install user defined type that has not been referenced yet. */ |
1462 | alloc_utype (dip -> die_ref, type); | |
1463 | } | |
1464 | else if (TYPE_CODE (utype) == TYPE_CODE_UNDEF) | |
1465 | { | |
1466 | /* Ick! A forward ref has already generated a blank type in our | |
1467 | slot, and this type probably already has things pointing to it | |
1468 | (which is what caused it to be created in the first place). | |
1469 | If it's just a place holder we can plop our fully defined type | |
1470 | on top of it. We can't recover the space allocated for our | |
1471 | new type since it might be on an obstack, but we could reuse | |
1472 | it if we kept a list of them, but it might not be worth it | |
1473 | (FIXME). */ | |
1474 | *utype = *type; | |
35f5886e FF |
1475 | } |
1476 | else | |
1477 | { | |
85f0a848 FF |
1478 | /* Double ick! Not only is a type already in our slot, but |
1479 | someone has decorated it. Complain and leave it alone. */ | |
51b80b00 | 1480 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); |
35f5886e FF |
1481 | } |
1482 | } | |
1483 | } | |
1484 | ||
1485 | /* | |
1486 | ||
9e4c1921 FF |
1487 | LOCAL FUNCTION |
1488 | ||
1489 | read_tag_pointer_type -- read TAG_pointer_type DIE | |
1490 | ||
1491 | SYNOPSIS | |
1492 | ||
1493 | static void read_tag_pointer_type (struct dieinfo *dip) | |
1494 | ||
1495 | DESCRIPTION | |
1496 | ||
1497 | Extract all information from a TAG_pointer_type DIE and add to | |
1498 | the user defined type vector. | |
1499 | */ | |
1500 | ||
1501 | static void | |
1ab3bf1b JG |
1502 | read_tag_pointer_type (dip) |
1503 | struct dieinfo *dip; | |
9e4c1921 FF |
1504 | { |
1505 | struct type *type; | |
1506 | struct type *utype; | |
9e4c1921 FF |
1507 | |
1508 | type = decode_die_type (dip); | |
13b5a7ff | 1509 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) |
9e4c1921 FF |
1510 | { |
1511 | utype = lookup_pointer_type (type); | |
4ed3a9ea | 1512 | alloc_utype (dip -> die_ref, utype); |
9e4c1921 FF |
1513 | } |
1514 | else | |
1515 | { | |
1516 | TYPE_TARGET_TYPE (utype) = type; | |
1517 | TYPE_POINTER_TYPE (type) = utype; | |
1518 | ||
1519 | /* We assume the machine has only one representation for pointers! */ | |
1520 | /* FIXME: This confuses host<->target data representations, and is a | |
1521 | poor assumption besides. */ | |
1522 | ||
1523 | TYPE_LENGTH (utype) = sizeof (char *); | |
1524 | TYPE_CODE (utype) = TYPE_CODE_PTR; | |
1525 | } | |
1526 | } | |
1527 | ||
1528 | /* | |
1529 | ||
ec16f701 FF |
1530 | LOCAL FUNCTION |
1531 | ||
1532 | read_tag_string_type -- read TAG_string_type DIE | |
1533 | ||
1534 | SYNOPSIS | |
1535 | ||
1536 | static void read_tag_string_type (struct dieinfo *dip) | |
1537 | ||
1538 | DESCRIPTION | |
1539 | ||
1540 | Extract all information from a TAG_string_type DIE and add to | |
1541 | the user defined type vector. It isn't really a user defined | |
1542 | type, but it behaves like one, with other DIE's using an | |
1543 | AT_user_def_type attribute to reference it. | |
1544 | */ | |
1545 | ||
1546 | static void | |
1547 | read_tag_string_type (dip) | |
1548 | struct dieinfo *dip; | |
1549 | { | |
1550 | struct type *utype; | |
1551 | struct type *indextype; | |
1552 | struct type *rangetype; | |
1553 | unsigned long lowbound = 0; | |
1554 | unsigned long highbound; | |
1555 | ||
1556 | if ((utype = lookup_utype (dip -> die_ref)) != NULL) | |
1557 | { | |
1558 | /* Ack, someone has stuck a type in the slot we want. Complain | |
1559 | about it. */ | |
1560 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); | |
1561 | } | |
1562 | else | |
1563 | { | |
1564 | if (dip -> has_at_byte_size) | |
1565 | { | |
1566 | /* A fixed bounds string */ | |
1567 | highbound = dip -> at_byte_size - 1; | |
1568 | } | |
1569 | else | |
1570 | { | |
1571 | /* A varying length string. Stub for now. (FIXME) */ | |
1572 | highbound = 1; | |
1573 | } | |
1574 | indextype = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1575 | rangetype = create_range_type ((struct type *) NULL, indextype, | |
1576 | lowbound, highbound); | |
1577 | utype = create_string_type ((struct type *) NULL, rangetype); | |
1578 | alloc_utype (dip -> die_ref, utype); | |
1579 | } | |
1580 | } | |
1581 | ||
1582 | /* | |
1583 | ||
35f5886e FF |
1584 | LOCAL FUNCTION |
1585 | ||
1586 | read_subroutine_type -- process TAG_subroutine_type dies | |
1587 | ||
1588 | SYNOPSIS | |
1589 | ||
1590 | static void read_subroutine_type (struct dieinfo *dip, char thisdie, | |
1591 | char *enddie) | |
1592 | ||
1593 | DESCRIPTION | |
1594 | ||
1595 | Handle DIES due to C code like: | |
1596 | ||
1597 | struct foo { | |
1598 | int (*funcp)(int a, long l); (Generates TAG_subroutine_type DIE) | |
1599 | int b; | |
1600 | }; | |
1601 | ||
1602 | NOTES | |
1603 | ||
1604 | The parameter DIES are currently ignored. See if gdb has a way to | |
1605 | include this info in it's type system, and decode them if so. Is | |
1606 | this what the type structure's "arg_types" field is for? (FIXME) | |
1607 | */ | |
1608 | ||
1609 | static void | |
1ab3bf1b JG |
1610 | read_subroutine_type (dip, thisdie, enddie) |
1611 | struct dieinfo *dip; | |
1612 | char *thisdie; | |
1613 | char *enddie; | |
35f5886e | 1614 | { |
af213624 FF |
1615 | struct type *type; /* Type that this function returns */ |
1616 | struct type *ftype; /* Function that returns above type */ | |
35f5886e | 1617 | |
af213624 FF |
1618 | /* Decode the type that this subroutine returns */ |
1619 | ||
35f5886e | 1620 | type = decode_die_type (dip); |
af213624 FF |
1621 | |
1622 | /* Check to see if we already have a partially constructed user | |
1623 | defined type for this DIE, from a forward reference. */ | |
1624 | ||
13b5a7ff | 1625 | if ((ftype = lookup_utype (dip -> die_ref)) == NULL) |
af213624 FF |
1626 | { |
1627 | /* This is the first reference to one of these types. Make | |
1628 | a new one and place it in the user defined types. */ | |
1629 | ftype = lookup_function_type (type); | |
4ed3a9ea | 1630 | alloc_utype (dip -> die_ref, ftype); |
af213624 | 1631 | } |
85f0a848 | 1632 | else if (TYPE_CODE (ftype) == TYPE_CODE_UNDEF) |
af213624 FF |
1633 | { |
1634 | /* We have an existing partially constructed type, so bash it | |
1635 | into the correct type. */ | |
1636 | TYPE_TARGET_TYPE (ftype) = type; | |
1637 | TYPE_FUNCTION_TYPE (type) = ftype; | |
1638 | TYPE_LENGTH (ftype) = 1; | |
1639 | TYPE_CODE (ftype) = TYPE_CODE_FUNC; | |
1640 | } | |
85f0a848 FF |
1641 | else |
1642 | { | |
51b80b00 | 1643 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); |
85f0a848 | 1644 | } |
35f5886e FF |
1645 | } |
1646 | ||
1647 | /* | |
1648 | ||
1649 | LOCAL FUNCTION | |
1650 | ||
1651 | read_enumeration -- process dies which define an enumeration | |
1652 | ||
1653 | SYNOPSIS | |
1654 | ||
1655 | static void read_enumeration (struct dieinfo *dip, char *thisdie, | |
1ab3bf1b | 1656 | char *enddie, struct objfile *objfile) |
35f5886e FF |
1657 | |
1658 | DESCRIPTION | |
1659 | ||
1660 | Given a pointer to a die which begins an enumeration, process all | |
1661 | the dies that define the members of the enumeration. | |
1662 | ||
1663 | NOTES | |
1664 | ||
1665 | Note that we need to call enum_type regardless of whether or not we | |
1666 | have a symbol, since we might have an enum without a tag name (thus | |
1667 | no symbol for the tagname). | |
1668 | */ | |
1669 | ||
1670 | static void | |
1ab3bf1b JG |
1671 | read_enumeration (dip, thisdie, enddie, objfile) |
1672 | struct dieinfo *dip; | |
1673 | char *thisdie; | |
1674 | char *enddie; | |
1675 | struct objfile *objfile; | |
35f5886e FF |
1676 | { |
1677 | struct type *type; | |
1678 | struct symbol *sym; | |
1679 | ||
1ab3bf1b | 1680 | type = enum_type (dip, objfile); |
95ff889e FF |
1681 | sym = new_symbol (dip, objfile); |
1682 | if (sym != NULL) | |
35f5886e FF |
1683 | { |
1684 | SYMBOL_TYPE (sym) = type; | |
95ff889e FF |
1685 | if (cu_language == language_cplus) |
1686 | { | |
1687 | synthesize_typedef (dip, objfile, type); | |
1688 | } | |
35f5886e FF |
1689 | } |
1690 | } | |
1691 | ||
1692 | /* | |
1693 | ||
1694 | LOCAL FUNCTION | |
1695 | ||
1696 | enum_type -- decode and return a type for an enumeration | |
1697 | ||
1698 | SYNOPSIS | |
1699 | ||
1ab3bf1b | 1700 | static type *enum_type (struct dieinfo *dip, struct objfile *objfile) |
35f5886e FF |
1701 | |
1702 | DESCRIPTION | |
1703 | ||
1704 | Given a pointer to a die information structure for the die which | |
1705 | starts an enumeration, process all the dies that define the members | |
1706 | of the enumeration and return a type pointer for the enumeration. | |
98618bf7 | 1707 | |
715cafcb FF |
1708 | At the same time, for each member of the enumeration, create a |
1709 | symbol for it with namespace VAR_NAMESPACE and class LOC_CONST, | |
1710 | and give it the type of the enumeration itself. | |
1711 | ||
1712 | NOTES | |
1713 | ||
98618bf7 FF |
1714 | Note that the DWARF specification explicitly mandates that enum |
1715 | constants occur in reverse order from the source program order, | |
1716 | for "consistency" and because this ordering is easier for many | |
1ab3bf1b | 1717 | compilers to generate. (Draft 6, sec 3.8.5, Enumeration type |
715cafcb FF |
1718 | Entries). Because gdb wants to see the enum members in program |
1719 | source order, we have to ensure that the order gets reversed while | |
98618bf7 | 1720 | we are processing them. |
35f5886e FF |
1721 | */ |
1722 | ||
1723 | static struct type * | |
1ab3bf1b JG |
1724 | enum_type (dip, objfile) |
1725 | struct dieinfo *dip; | |
1726 | struct objfile *objfile; | |
35f5886e FF |
1727 | { |
1728 | struct type *type; | |
1729 | struct nextfield { | |
1730 | struct nextfield *next; | |
1731 | struct field field; | |
1732 | }; | |
1733 | struct nextfield *list = NULL; | |
1734 | struct nextfield *new; | |
1735 | int nfields = 0; | |
1736 | int n; | |
35f5886e FF |
1737 | char *scan; |
1738 | char *listend; | |
13b5a7ff | 1739 | unsigned short blocksz; |
715cafcb | 1740 | struct symbol *sym; |
13b5a7ff | 1741 | int nbytes; |
35f5886e | 1742 | |
13b5a7ff | 1743 | if ((type = lookup_utype (dip -> die_ref)) == NULL) |
35f5886e | 1744 | { |
84ce6717 | 1745 | /* No forward references created an empty type, so install one now */ |
13b5a7ff | 1746 | type = alloc_utype (dip -> die_ref, NULL); |
35f5886e FF |
1747 | } |
1748 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
84ce6717 FF |
1749 | /* Some compilers try to be helpful by inventing "fake" names for |
1750 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1751 | Thanks, but no thanks... */ | |
715cafcb FF |
1752 | if (dip -> at_name != NULL |
1753 | && *dip -> at_name != '~' | |
1754 | && *dip -> at_name != '.') | |
35f5886e | 1755 | { |
95967e73 | 1756 | TYPE_NAME (type) = obconcat (&objfile -> type_obstack, "enum", |
1ab3bf1b | 1757 | " ", dip -> at_name); |
35f5886e | 1758 | } |
715cafcb | 1759 | if (dip -> at_byte_size != 0) |
35f5886e FF |
1760 | { |
1761 | TYPE_LENGTH (type) = dip -> at_byte_size; | |
35f5886e | 1762 | } |
35f5886e FF |
1763 | if ((scan = dip -> at_element_list) != NULL) |
1764 | { | |
768be6e1 FF |
1765 | if (dip -> short_element_list) |
1766 | { | |
13b5a7ff | 1767 | nbytes = attribute_size (AT_short_element_list); |
768be6e1 FF |
1768 | } |
1769 | else | |
1770 | { | |
13b5a7ff | 1771 | nbytes = attribute_size (AT_element_list); |
768be6e1 | 1772 | } |
13b5a7ff FF |
1773 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); |
1774 | listend = scan + nbytes + blocksz; | |
1775 | scan += nbytes; | |
35f5886e FF |
1776 | while (scan < listend) |
1777 | { | |
1778 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1779 | new -> next = list; | |
1780 | list = new; | |
1781 | list -> field.type = NULL; | |
1782 | list -> field.bitsize = 0; | |
13b5a7ff FF |
1783 | list -> field.bitpos = |
1784 | target_to_host (scan, TARGET_FT_LONG_SIZE (objfile), GET_SIGNED, | |
1785 | objfile); | |
1786 | scan += TARGET_FT_LONG_SIZE (objfile); | |
50e0dc41 FF |
1787 | list -> field.name = obsavestring (scan, strlen (scan), |
1788 | &objfile -> type_obstack); | |
35f5886e FF |
1789 | scan += strlen (scan) + 1; |
1790 | nfields++; | |
715cafcb | 1791 | /* Handcraft a new symbol for this enum member. */ |
1ab3bf1b | 1792 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
715cafcb | 1793 | sizeof (struct symbol)); |
4ed3a9ea | 1794 | memset (sym, 0, sizeof (struct symbol)); |
13b5a7ff FF |
1795 | SYMBOL_NAME (sym) = create_name (list -> field.name, |
1796 | &objfile->symbol_obstack); | |
7532cf10 | 1797 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); |
715cafcb FF |
1798 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
1799 | SYMBOL_CLASS (sym) = LOC_CONST; | |
1800 | SYMBOL_TYPE (sym) = type; | |
1801 | SYMBOL_VALUE (sym) = list -> field.bitpos; | |
4d315a07 | 1802 | add_symbol_to_list (sym, list_in_scope); |
35f5886e | 1803 | } |
84ce6717 | 1804 | /* Now create the vector of fields, and record how big it is. This is |
0efe20a6 | 1805 | where we reverse the order, by pulling the members off the list in |
84ce6717 FF |
1806 | reverse order from how they were inserted. If we have no fields |
1807 | (this is apparently possible in C++) then skip building a field | |
1808 | vector. */ | |
1809 | if (nfields > 0) | |
1810 | { | |
1811 | TYPE_NFIELDS (type) = nfields; | |
1812 | TYPE_FIELDS (type) = (struct field *) | |
1ab3bf1b | 1813 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct field) * nfields); |
84ce6717 FF |
1814 | /* Copy the saved-up fields into the field vector. */ |
1815 | for (n = 0; (n < nfields) && (list != NULL); list = list -> next) | |
1816 | { | |
1817 | TYPE_FIELD (type, n++) = list -> field; | |
1818 | } | |
1819 | } | |
35f5886e | 1820 | } |
35f5886e FF |
1821 | return (type); |
1822 | } | |
1823 | ||
1824 | /* | |
1825 | ||
1826 | LOCAL FUNCTION | |
1827 | ||
1828 | read_func_scope -- process all dies within a function scope | |
1829 | ||
35f5886e FF |
1830 | DESCRIPTION |
1831 | ||
1832 | Process all dies within a given function scope. We are passed | |
1833 | a die information structure pointer DIP for the die which | |
1834 | starts the function scope, and pointers into the raw die data | |
1835 | that define the dies within the function scope. | |
1836 | ||
1837 | For now, we ignore lexical block scopes within the function. | |
1838 | The problem is that AT&T cc does not define a DWARF lexical | |
1839 | block scope for the function itself, while gcc defines a | |
1840 | lexical block scope for the function. We need to think about | |
1841 | how to handle this difference, or if it is even a problem. | |
1842 | (FIXME) | |
1843 | */ | |
1844 | ||
1845 | static void | |
1ab3bf1b JG |
1846 | read_func_scope (dip, thisdie, enddie, objfile) |
1847 | struct dieinfo *dip; | |
1848 | char *thisdie; | |
1849 | char *enddie; | |
1850 | struct objfile *objfile; | |
35f5886e | 1851 | { |
4d315a07 | 1852 | register struct context_stack *new; |
35f5886e | 1853 | |
5e2e79f8 FF |
1854 | if (objfile -> ei.entry_point >= dip -> at_low_pc && |
1855 | objfile -> ei.entry_point < dip -> at_high_pc) | |
35f5886e | 1856 | { |
5e2e79f8 FF |
1857 | objfile -> ei.entry_func_lowpc = dip -> at_low_pc; |
1858 | objfile -> ei.entry_func_highpc = dip -> at_high_pc; | |
35f5886e | 1859 | } |
4d315a07 | 1860 | if (STREQ (dip -> at_name, "main")) /* FIXME: hardwired name */ |
35f5886e | 1861 | { |
5e2e79f8 FF |
1862 | objfile -> ei.main_func_lowpc = dip -> at_low_pc; |
1863 | objfile -> ei.main_func_highpc = dip -> at_high_pc; | |
35f5886e | 1864 | } |
4d315a07 | 1865 | new = push_context (0, dip -> at_low_pc); |
1ab3bf1b | 1866 | new -> name = new_symbol (dip, objfile); |
4d315a07 | 1867 | list_in_scope = &local_symbols; |
13b5a7ff | 1868 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 FF |
1869 | new = pop_context (); |
1870 | /* Make a block for the local symbols within. */ | |
1871 | finish_block (new -> name, &local_symbols, new -> old_blocks, | |
1ab3bf1b | 1872 | new -> start_addr, dip -> at_high_pc, objfile); |
4d315a07 | 1873 | list_in_scope = &file_symbols; |
35f5886e FF |
1874 | } |
1875 | ||
2dbde378 FF |
1876 | |
1877 | /* | |
1878 | ||
1879 | LOCAL FUNCTION | |
1880 | ||
1881 | handle_producer -- process the AT_producer attribute | |
1882 | ||
1883 | DESCRIPTION | |
1884 | ||
1885 | Perform any operations that depend on finding a particular | |
1886 | AT_producer attribute. | |
1887 | ||
1888 | */ | |
1889 | ||
1890 | static void | |
1891 | handle_producer (producer) | |
1892 | char *producer; | |
1893 | { | |
1894 | ||
1895 | /* If this compilation unit was compiled with g++ or gcc, then set the | |
1896 | processing_gcc_compilation flag. */ | |
1897 | ||
1898 | processing_gcc_compilation = | |
1899 | STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER)) | |
93bb6e65 FF |
1900 | /* start-sanitize-chill */ |
1901 | || STREQN (producer, CHILL_PRODUCER, strlen (CHILL_PRODUCER)) | |
1902 | /* end-sanitize-chill */ | |
2dbde378 FF |
1903 | || STREQN (producer, GCC_PRODUCER, strlen (GCC_PRODUCER)); |
1904 | ||
1905 | /* Select a demangling style if we can identify the producer and if | |
1906 | the current style is auto. We leave the current style alone if it | |
1907 | is not auto. We also leave the demangling style alone if we find a | |
1908 | gcc (cc1) producer, as opposed to a g++ (cc1plus) producer. */ | |
1909 | ||
d23639b2 | 1910 | #if 1 /* Works, but is experimental. -fnf */ |
3dc755fb | 1911 | if (AUTO_DEMANGLING) |
2dbde378 FF |
1912 | { |
1913 | if (STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER))) | |
1914 | { | |
1915 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); | |
1916 | } | |
1917 | else if (STREQN (producer, LCC_PRODUCER, strlen (LCC_PRODUCER))) | |
1918 | { | |
1919 | set_demangling_style (LUCID_DEMANGLING_STYLE_STRING); | |
1920 | } | |
1921 | else if (STREQN (producer, CFRONT_PRODUCER, strlen (CFRONT_PRODUCER))) | |
1922 | { | |
1923 | set_demangling_style (CFRONT_DEMANGLING_STYLE_STRING); | |
1924 | } | |
1925 | } | |
1926 | #endif | |
1927 | } | |
1928 | ||
1929 | ||
35f5886e FF |
1930 | /* |
1931 | ||
1932 | LOCAL FUNCTION | |
1933 | ||
1934 | read_file_scope -- process all dies within a file scope | |
1935 | ||
35f5886e FF |
1936 | DESCRIPTION |
1937 | ||
1938 | Process all dies within a given file scope. We are passed a | |
1939 | pointer to the die information structure for the die which | |
1940 | starts the file scope, and pointers into the raw die data which | |
1941 | mark the range of dies within the file scope. | |
1942 | ||
1943 | When the partial symbol table is built, the file offset for the line | |
1944 | number table for each compilation unit is saved in the partial symbol | |
1945 | table entry for that compilation unit. As the symbols for each | |
1946 | compilation unit are read, the line number table is read into memory | |
1947 | and the variable lnbase is set to point to it. Thus all we have to | |
1948 | do is use lnbase to access the line number table for the current | |
1949 | compilation unit. | |
1950 | */ | |
1951 | ||
1952 | static void | |
1ab3bf1b JG |
1953 | read_file_scope (dip, thisdie, enddie, objfile) |
1954 | struct dieinfo *dip; | |
1955 | char *thisdie; | |
1956 | char *enddie; | |
1957 | struct objfile *objfile; | |
35f5886e FF |
1958 | { |
1959 | struct cleanup *back_to; | |
4d315a07 | 1960 | struct symtab *symtab; |
35f5886e | 1961 | |
5e2e79f8 FF |
1962 | if (objfile -> ei.entry_point >= dip -> at_low_pc && |
1963 | objfile -> ei.entry_point < dip -> at_high_pc) | |
35f5886e | 1964 | { |
5e2e79f8 FF |
1965 | objfile -> ei.entry_file_lowpc = dip -> at_low_pc; |
1966 | objfile -> ei.entry_file_highpc = dip -> at_high_pc; | |
35f5886e | 1967 | } |
95ff889e | 1968 | set_cu_language (dip); |
4d315a07 FF |
1969 | if (dip -> at_producer != NULL) |
1970 | { | |
2dbde378 | 1971 | handle_producer (dip -> at_producer); |
4d315a07 | 1972 | } |
35f5886e FF |
1973 | numutypes = (enddie - thisdie) / 4; |
1974 | utypes = (struct type **) xmalloc (numutypes * sizeof (struct type *)); | |
1975 | back_to = make_cleanup (free, utypes); | |
4ed3a9ea | 1976 | memset (utypes, 0, numutypes * sizeof (struct type *)); |
bf229b4e | 1977 | memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *)); |
d4902ab0 | 1978 | start_symtab (dip -> at_name, dip -> at_comp_dir, dip -> at_low_pc); |
35f5886e | 1979 | decode_line_numbers (lnbase); |
13b5a7ff | 1980 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 | 1981 | symtab = end_symtab (dip -> at_high_pc, 0, 0, objfile); |
7b5d9650 | 1982 | if (symtab != NULL) |
4d315a07 | 1983 | { |
95ff889e | 1984 | symtab -> language = cu_language; |
7b5d9650 | 1985 | } |
35f5886e FF |
1986 | do_cleanups (back_to); |
1987 | utypes = NULL; | |
1988 | numutypes = 0; | |
1989 | } | |
1990 | ||
1991 | /* | |
1992 | ||
35f5886e FF |
1993 | LOCAL FUNCTION |
1994 | ||
1995 | process_dies -- process a range of DWARF Information Entries | |
1996 | ||
1997 | SYNOPSIS | |
1998 | ||
8b5b6fae FF |
1999 | static void process_dies (char *thisdie, char *enddie, |
2000 | struct objfile *objfile) | |
35f5886e FF |
2001 | |
2002 | DESCRIPTION | |
2003 | ||
2004 | Process all DIE's in a specified range. May be (and almost | |
2005 | certainly will be) called recursively. | |
2006 | */ | |
2007 | ||
2008 | static void | |
1ab3bf1b JG |
2009 | process_dies (thisdie, enddie, objfile) |
2010 | char *thisdie; | |
2011 | char *enddie; | |
2012 | struct objfile *objfile; | |
35f5886e FF |
2013 | { |
2014 | char *nextdie; | |
2015 | struct dieinfo di; | |
2016 | ||
2017 | while (thisdie < enddie) | |
2018 | { | |
95967e73 | 2019 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2020 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2021 | { |
2022 | break; | |
2023 | } | |
13b5a7ff | 2024 | else if (di.die_tag == TAG_padding) |
35f5886e | 2025 | { |
13b5a7ff | 2026 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2027 | } |
2028 | else | |
2029 | { | |
95967e73 | 2030 | completedieinfo (&di, objfile); |
35f5886e FF |
2031 | if (di.at_sibling != 0) |
2032 | { | |
2033 | nextdie = dbbase + di.at_sibling - dbroff; | |
2034 | } | |
2035 | else | |
2036 | { | |
13b5a7ff | 2037 | nextdie = thisdie + di.die_length; |
35f5886e | 2038 | } |
13b5a7ff | 2039 | switch (di.die_tag) |
35f5886e FF |
2040 | { |
2041 | case TAG_compile_unit: | |
a048c8f5 | 2042 | read_file_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2043 | break; |
2044 | case TAG_global_subroutine: | |
2045 | case TAG_subroutine: | |
2d6186f4 | 2046 | if (di.has_at_low_pc) |
35f5886e | 2047 | { |
a048c8f5 | 2048 | read_func_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2049 | } |
2050 | break; | |
2051 | case TAG_lexical_block: | |
a048c8f5 | 2052 | read_lexical_block_scope (&di, thisdie, nextdie, objfile); |
35f5886e | 2053 | break; |
95ff889e | 2054 | case TAG_class_type: |
35f5886e FF |
2055 | case TAG_structure_type: |
2056 | case TAG_union_type: | |
8b5b6fae | 2057 | read_structure_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2058 | break; |
2059 | case TAG_enumeration_type: | |
1ab3bf1b | 2060 | read_enumeration (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2061 | break; |
2062 | case TAG_subroutine_type: | |
2063 | read_subroutine_type (&di, thisdie, nextdie); | |
2064 | break; | |
2065 | case TAG_array_type: | |
4d315a07 | 2066 | dwarf_read_array_type (&di); |
35f5886e | 2067 | break; |
9e4c1921 FF |
2068 | case TAG_pointer_type: |
2069 | read_tag_pointer_type (&di); | |
2070 | break; | |
ec16f701 FF |
2071 | case TAG_string_type: |
2072 | read_tag_string_type (&di); | |
2073 | break; | |
35f5886e | 2074 | default: |
4ed3a9ea | 2075 | new_symbol (&di, objfile); |
35f5886e FF |
2076 | break; |
2077 | } | |
2078 | } | |
2079 | thisdie = nextdie; | |
2080 | } | |
2081 | } | |
2082 | ||
2083 | /* | |
2084 | ||
35f5886e FF |
2085 | LOCAL FUNCTION |
2086 | ||
2087 | decode_line_numbers -- decode a line number table fragment | |
2088 | ||
2089 | SYNOPSIS | |
2090 | ||
2091 | static void decode_line_numbers (char *tblscan, char *tblend, | |
2092 | long length, long base, long line, long pc) | |
2093 | ||
2094 | DESCRIPTION | |
2095 | ||
2096 | Translate the DWARF line number information to gdb form. | |
2097 | ||
2098 | The ".line" section contains one or more line number tables, one for | |
2099 | each ".line" section from the objects that were linked. | |
2100 | ||
2101 | The AT_stmt_list attribute for each TAG_source_file entry in the | |
2102 | ".debug" section contains the offset into the ".line" section for the | |
2103 | start of the table for that file. | |
2104 | ||
2105 | The table itself has the following structure: | |
2106 | ||
2107 | <table length><base address><source statement entry> | |
2108 | 4 bytes 4 bytes 10 bytes | |
2109 | ||
2110 | The table length is the total size of the table, including the 4 bytes | |
2111 | for the length information. | |
2112 | ||
2113 | The base address is the address of the first instruction generated | |
2114 | for the source file. | |
2115 | ||
2116 | Each source statement entry has the following structure: | |
2117 | ||
2118 | <line number><statement position><address delta> | |
2119 | 4 bytes 2 bytes 4 bytes | |
2120 | ||
2121 | The line number is relative to the start of the file, starting with | |
2122 | line 1. | |
2123 | ||
2124 | The statement position either -1 (0xFFFF) or the number of characters | |
2125 | from the beginning of the line to the beginning of the statement. | |
2126 | ||
2127 | The address delta is the difference between the base address and | |
2128 | the address of the first instruction for the statement. | |
2129 | ||
2130 | Note that we must copy the bytes from the packed table to our local | |
2131 | variables before attempting to use them, to avoid alignment problems | |
2132 | on some machines, particularly RISC processors. | |
2133 | ||
2134 | BUGS | |
2135 | ||
2136 | Does gdb expect the line numbers to be sorted? They are now by | |
2137 | chance/luck, but are not required to be. (FIXME) | |
2138 | ||
2139 | The line with number 0 is unused, gdb apparently can discover the | |
2140 | span of the last line some other way. How? (FIXME) | |
2141 | */ | |
2142 | ||
2143 | static void | |
1ab3bf1b JG |
2144 | decode_line_numbers (linetable) |
2145 | char *linetable; | |
35f5886e FF |
2146 | { |
2147 | char *tblscan; | |
2148 | char *tblend; | |
13b5a7ff FF |
2149 | unsigned long length; |
2150 | unsigned long base; | |
2151 | unsigned long line; | |
2152 | unsigned long pc; | |
35f5886e FF |
2153 | |
2154 | if (linetable != NULL) | |
2155 | { | |
2156 | tblscan = tblend = linetable; | |
13b5a7ff FF |
2157 | length = target_to_host (tblscan, SIZEOF_LINETBL_LENGTH, GET_UNSIGNED, |
2158 | current_objfile); | |
2159 | tblscan += SIZEOF_LINETBL_LENGTH; | |
35f5886e | 2160 | tblend += length; |
13b5a7ff FF |
2161 | base = target_to_host (tblscan, TARGET_FT_POINTER_SIZE (objfile), |
2162 | GET_UNSIGNED, current_objfile); | |
2163 | tblscan += TARGET_FT_POINTER_SIZE (objfile); | |
35f5886e | 2164 | base += baseaddr; |
35f5886e FF |
2165 | while (tblscan < tblend) |
2166 | { | |
13b5a7ff FF |
2167 | line = target_to_host (tblscan, SIZEOF_LINETBL_LINENO, GET_UNSIGNED, |
2168 | current_objfile); | |
2169 | tblscan += SIZEOF_LINETBL_LINENO + SIZEOF_LINETBL_STMT; | |
2170 | pc = target_to_host (tblscan, SIZEOF_LINETBL_DELTA, GET_UNSIGNED, | |
2171 | current_objfile); | |
2172 | tblscan += SIZEOF_LINETBL_DELTA; | |
35f5886e | 2173 | pc += base; |
13b5a7ff | 2174 | if (line != 0) |
35f5886e | 2175 | { |
4d315a07 | 2176 | record_line (current_subfile, line, pc); |
35f5886e FF |
2177 | } |
2178 | } | |
2179 | } | |
2180 | } | |
2181 | ||
2182 | /* | |
2183 | ||
35f5886e FF |
2184 | LOCAL FUNCTION |
2185 | ||
2186 | locval -- compute the value of a location attribute | |
2187 | ||
2188 | SYNOPSIS | |
2189 | ||
2190 | static int locval (char *loc) | |
2191 | ||
2192 | DESCRIPTION | |
2193 | ||
2194 | Given pointer to a string of bytes that define a location, compute | |
2195 | the location and return the value. | |
2196 | ||
2197 | When computing values involving the current value of the frame pointer, | |
2198 | the value zero is used, which results in a value relative to the frame | |
2199 | pointer, rather than the absolute value. This is what GDB wants | |
2200 | anyway. | |
2201 | ||
2202 | When the result is a register number, the global isreg flag is set, | |
2203 | otherwise it is cleared. This is a kludge until we figure out a better | |
2204 | way to handle the problem. Gdb's design does not mesh well with the | |
2205 | DWARF notion of a location computing interpreter, which is a shame | |
2206 | because the flexibility goes unused. | |
2207 | ||
2208 | NOTES | |
2209 | ||
2210 | Note that stack[0] is unused except as a default error return. | |
2211 | Note that stack overflow is not yet handled. | |
2212 | */ | |
2213 | ||
2214 | static int | |
1ab3bf1b JG |
2215 | locval (loc) |
2216 | char *loc; | |
35f5886e FF |
2217 | { |
2218 | unsigned short nbytes; | |
13b5a7ff FF |
2219 | unsigned short locsize; |
2220 | auto long stack[64]; | |
35f5886e FF |
2221 | int stacki; |
2222 | char *end; | |
2223 | long regno; | |
13b5a7ff FF |
2224 | int loc_atom_code; |
2225 | int loc_value_size; | |
35f5886e | 2226 | |
13b5a7ff FF |
2227 | nbytes = attribute_size (AT_location); |
2228 | locsize = target_to_host (loc, nbytes, GET_UNSIGNED, current_objfile); | |
2229 | loc += nbytes; | |
2230 | end = loc + locsize; | |
35f5886e FF |
2231 | stacki = 0; |
2232 | stack[stacki] = 0; | |
2233 | isreg = 0; | |
a5bd5ba6 | 2234 | offreg = 0; |
13b5a7ff FF |
2235 | loc_value_size = TARGET_FT_LONG_SIZE (current_objfile); |
2236 | while (loc < end) | |
35f5886e | 2237 | { |
13b5a7ff FF |
2238 | loc_atom_code = target_to_host (loc, SIZEOF_LOC_ATOM_CODE, GET_UNSIGNED, |
2239 | current_objfile); | |
2240 | loc += SIZEOF_LOC_ATOM_CODE; | |
2241 | switch (loc_atom_code) | |
2242 | { | |
2243 | case 0: | |
2244 | /* error */ | |
2245 | loc = end; | |
2246 | break; | |
2247 | case OP_REG: | |
2248 | /* push register (number) */ | |
2249 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2250 | GET_UNSIGNED, current_objfile); | |
2251 | loc += loc_value_size; | |
2252 | isreg = 1; | |
2253 | break; | |
2254 | case OP_BASEREG: | |
2255 | /* push value of register (number) */ | |
2256 | /* Actually, we compute the value as if register has 0 */ | |
2257 | offreg = 1; | |
2258 | regno = target_to_host (loc, loc_value_size, GET_UNSIGNED, | |
2259 | current_objfile); | |
2260 | loc += loc_value_size; | |
2261 | if (regno == R_FP) | |
2262 | { | |
2263 | stack[++stacki] = 0; | |
2264 | } | |
2265 | else | |
2266 | { | |
2267 | stack[++stacki] = 0; | |
51b80b00 FF |
2268 | |
2269 | complain (&basereg_not_handled, DIE_ID, DIE_NAME, regno); | |
13b5a7ff FF |
2270 | } |
2271 | break; | |
2272 | case OP_ADDR: | |
2273 | /* push address (relocated address) */ | |
2274 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2275 | GET_UNSIGNED, current_objfile); | |
2276 | loc += loc_value_size; | |
2277 | break; | |
2278 | case OP_CONST: | |
2279 | /* push constant (number) FIXME: signed or unsigned! */ | |
2280 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2281 | GET_SIGNED, current_objfile); | |
2282 | loc += loc_value_size; | |
2283 | break; | |
2284 | case OP_DEREF2: | |
2285 | /* pop, deref and push 2 bytes (as a long) */ | |
51b80b00 | 2286 | complain (&op_deref2, DIE_ID, DIE_NAME, stack[stacki]); |
13b5a7ff FF |
2287 | break; |
2288 | case OP_DEREF4: /* pop, deref and push 4 bytes (as a long) */ | |
51b80b00 | 2289 | complain (&op_deref4, DIE_ID, DIE_NAME, stack[stacki]); |
13b5a7ff FF |
2290 | break; |
2291 | case OP_ADD: /* pop top 2 items, add, push result */ | |
2292 | stack[stacki - 1] += stack[stacki]; | |
2293 | stacki--; | |
2294 | break; | |
2295 | } | |
35f5886e FF |
2296 | } |
2297 | return (stack[stacki]); | |
2298 | } | |
2299 | ||
2300 | /* | |
2301 | ||
2302 | LOCAL FUNCTION | |
2303 | ||
2304 | read_ofile_symtab -- build a full symtab entry from chunk of DIE's | |
2305 | ||
2306 | SYNOPSIS | |
2307 | ||
a048c8f5 | 2308 | static struct symtab *read_ofile_symtab (struct partial_symtab *pst) |
35f5886e FF |
2309 | |
2310 | DESCRIPTION | |
2311 | ||
1ab3bf1b JG |
2312 | When expanding a partial symbol table entry to a full symbol table |
2313 | entry, this is the function that gets called to read in the symbols | |
2314 | for the compilation unit. | |
2315 | ||
2316 | Returns a pointer to the newly constructed symtab (which is now | |
2317 | the new first one on the objfile's symtab list). | |
35f5886e FF |
2318 | */ |
2319 | ||
2320 | static struct symtab * | |
1ab3bf1b JG |
2321 | read_ofile_symtab (pst) |
2322 | struct partial_symtab *pst; | |
35f5886e FF |
2323 | { |
2324 | struct cleanup *back_to; | |
13b5a7ff | 2325 | unsigned long lnsize; |
d5931d79 | 2326 | file_ptr foffset; |
1ab3bf1b | 2327 | bfd *abfd; |
13b5a7ff | 2328 | char lnsizedata[SIZEOF_LINETBL_LENGTH]; |
1ab3bf1b JG |
2329 | |
2330 | abfd = pst -> objfile -> obfd; | |
2331 | current_objfile = pst -> objfile; | |
2332 | ||
35f5886e FF |
2333 | /* Allocate a buffer for the entire chunk of DIE's for this compilation |
2334 | unit, seek to the location in the file, and read in all the DIE's. */ | |
2335 | ||
2336 | diecount = 0; | |
4090fe1c FF |
2337 | dbsize = DBLENGTH (pst); |
2338 | dbbase = xmalloc (dbsize); | |
35f5886e FF |
2339 | dbroff = DBROFF(pst); |
2340 | foffset = DBFOFF(pst) + dbroff; | |
2670f34d JG |
2341 | base_section_offsets = pst->section_offsets; |
2342 | baseaddr = ANOFFSET (pst->section_offsets, 0); | |
d5931d79 | 2343 | if (bfd_seek (abfd, foffset, L_SET) || |
4090fe1c | 2344 | (bfd_read (dbbase, dbsize, 1, abfd) != dbsize)) |
35f5886e FF |
2345 | { |
2346 | free (dbbase); | |
2347 | error ("can't read DWARF data"); | |
2348 | } | |
2349 | back_to = make_cleanup (free, dbbase); | |
2350 | ||
2351 | /* If there is a line number table associated with this compilation unit | |
13b5a7ff FF |
2352 | then read the size of this fragment in bytes, from the fragment itself. |
2353 | Allocate a buffer for the fragment and read it in for future | |
35f5886e FF |
2354 | processing. */ |
2355 | ||
2356 | lnbase = NULL; | |
2357 | if (LNFOFF (pst)) | |
2358 | { | |
d5931d79 | 2359 | if (bfd_seek (abfd, LNFOFF (pst), L_SET) || |
13b5a7ff FF |
2360 | (bfd_read ((PTR) lnsizedata, sizeof (lnsizedata), 1, abfd) != |
2361 | sizeof (lnsizedata))) | |
35f5886e FF |
2362 | { |
2363 | error ("can't read DWARF line number table size"); | |
2364 | } | |
13b5a7ff FF |
2365 | lnsize = target_to_host (lnsizedata, SIZEOF_LINETBL_LENGTH, |
2366 | GET_UNSIGNED, pst -> objfile); | |
35f5886e | 2367 | lnbase = xmalloc (lnsize); |
d5931d79 | 2368 | if (bfd_seek (abfd, LNFOFF (pst), L_SET) || |
a048c8f5 | 2369 | (bfd_read (lnbase, lnsize, 1, abfd) != lnsize)) |
35f5886e FF |
2370 | { |
2371 | free (lnbase); | |
2372 | error ("can't read DWARF line numbers"); | |
2373 | } | |
2374 | make_cleanup (free, lnbase); | |
2375 | } | |
2376 | ||
4090fe1c | 2377 | process_dies (dbbase, dbbase + dbsize, pst -> objfile); |
35f5886e | 2378 | do_cleanups (back_to); |
1ab3bf1b JG |
2379 | current_objfile = NULL; |
2380 | return (pst -> objfile -> symtabs); | |
35f5886e FF |
2381 | } |
2382 | ||
2383 | /* | |
2384 | ||
2385 | LOCAL FUNCTION | |
2386 | ||
2387 | psymtab_to_symtab_1 -- do grunt work for building a full symtab entry | |
2388 | ||
2389 | SYNOPSIS | |
2390 | ||
a048c8f5 | 2391 | static void psymtab_to_symtab_1 (struct partial_symtab *pst) |
35f5886e FF |
2392 | |
2393 | DESCRIPTION | |
2394 | ||
2395 | Called once for each partial symbol table entry that needs to be | |
2396 | expanded into a full symbol table entry. | |
2397 | ||
2398 | */ | |
2399 | ||
2400 | static void | |
1ab3bf1b JG |
2401 | psymtab_to_symtab_1 (pst) |
2402 | struct partial_symtab *pst; | |
35f5886e FF |
2403 | { |
2404 | int i; | |
d07734e3 | 2405 | struct cleanup *old_chain; |
35f5886e | 2406 | |
1ab3bf1b | 2407 | if (pst != NULL) |
35f5886e | 2408 | { |
1ab3bf1b | 2409 | if (pst->readin) |
35f5886e | 2410 | { |
318bf84f | 2411 | warning ("psymtab for %s already read in. Shouldn't happen.", |
1ab3bf1b JG |
2412 | pst -> filename); |
2413 | } | |
2414 | else | |
2415 | { | |
2416 | /* Read in all partial symtabs on which this one is dependent */ | |
2417 | for (i = 0; i < pst -> number_of_dependencies; i++) | |
2418 | { | |
2419 | if (!pst -> dependencies[i] -> readin) | |
2420 | { | |
2421 | /* Inform about additional files that need to be read in. */ | |
2422 | if (info_verbose) | |
2423 | { | |
2424 | fputs_filtered (" ", stdout); | |
2425 | wrap_here (""); | |
2426 | fputs_filtered ("and ", stdout); | |
2427 | wrap_here (""); | |
2428 | printf_filtered ("%s...", | |
2429 | pst -> dependencies[i] -> filename); | |
2430 | wrap_here (""); | |
2431 | fflush (stdout); /* Flush output */ | |
2432 | } | |
2433 | psymtab_to_symtab_1 (pst -> dependencies[i]); | |
2434 | } | |
2435 | } | |
2436 | if (DBLENGTH (pst)) /* Otherwise it's a dummy */ | |
2437 | { | |
d07734e3 FF |
2438 | buildsym_init (); |
2439 | old_chain = make_cleanup (really_free_pendings, 0); | |
1ab3bf1b JG |
2440 | pst -> symtab = read_ofile_symtab (pst); |
2441 | if (info_verbose) | |
2442 | { | |
2443 | printf_filtered ("%d DIE's, sorting...", diecount); | |
2444 | wrap_here (""); | |
2445 | fflush (stdout); | |
2446 | } | |
2447 | sort_symtab_syms (pst -> symtab); | |
d07734e3 | 2448 | do_cleanups (old_chain); |
1ab3bf1b JG |
2449 | } |
2450 | pst -> readin = 1; | |
35f5886e | 2451 | } |
35f5886e | 2452 | } |
35f5886e FF |
2453 | } |
2454 | ||
2455 | /* | |
2456 | ||
2457 | LOCAL FUNCTION | |
2458 | ||
2459 | dwarf_psymtab_to_symtab -- build a full symtab entry from partial one | |
2460 | ||
2461 | SYNOPSIS | |
2462 | ||
2463 | static void dwarf_psymtab_to_symtab (struct partial_symtab *pst) | |
2464 | ||
2465 | DESCRIPTION | |
2466 | ||
2467 | This is the DWARF support entry point for building a full symbol | |
2468 | table entry from a partial symbol table entry. We are passed a | |
2469 | pointer to the partial symbol table entry that needs to be expanded. | |
2470 | ||
2471 | */ | |
2472 | ||
2473 | static void | |
1ab3bf1b JG |
2474 | dwarf_psymtab_to_symtab (pst) |
2475 | struct partial_symtab *pst; | |
35f5886e | 2476 | { |
7d9884b9 | 2477 | |
1ab3bf1b | 2478 | if (pst != NULL) |
35f5886e | 2479 | { |
1ab3bf1b | 2480 | if (pst -> readin) |
35f5886e | 2481 | { |
318bf84f | 2482 | warning ("psymtab for %s already read in. Shouldn't happen.", |
1ab3bf1b | 2483 | pst -> filename); |
35f5886e | 2484 | } |
1ab3bf1b | 2485 | else |
35f5886e | 2486 | { |
1ab3bf1b JG |
2487 | if (DBLENGTH (pst) || pst -> number_of_dependencies) |
2488 | { | |
2489 | /* Print the message now, before starting serious work, to avoid | |
2490 | disconcerting pauses. */ | |
2491 | if (info_verbose) | |
2492 | { | |
2493 | printf_filtered ("Reading in symbols for %s...", | |
2494 | pst -> filename); | |
2495 | fflush (stdout); | |
2496 | } | |
2497 | ||
2498 | psymtab_to_symtab_1 (pst); | |
2499 | ||
2500 | #if 0 /* FIXME: Check to see what dbxread is doing here and see if | |
2501 | we need to do an equivalent or is this something peculiar to | |
2502 | stabs/a.out format. | |
2503 | Match with global symbols. This only needs to be done once, | |
2504 | after all of the symtabs and dependencies have been read in. | |
2505 | */ | |
2506 | scan_file_globals (pst -> objfile); | |
2507 | #endif | |
2508 | ||
2509 | /* Finish up the verbose info message. */ | |
2510 | if (info_verbose) | |
2511 | { | |
2512 | printf_filtered ("done.\n"); | |
2513 | fflush (stdout); | |
2514 | } | |
2515 | } | |
35f5886e FF |
2516 | } |
2517 | } | |
2518 | } | |
2519 | ||
2520 | /* | |
2521 | ||
2522 | LOCAL FUNCTION | |
2523 | ||
2524 | init_psymbol_list -- initialize storage for partial symbols | |
2525 | ||
2526 | SYNOPSIS | |
2527 | ||
1ab3bf1b | 2528 | static void init_psymbol_list (struct objfile *objfile, int total_symbols) |
35f5886e FF |
2529 | |
2530 | DESCRIPTION | |
2531 | ||
2532 | Initializes storage for all of the partial symbols that will be | |
2533 | created by dwarf_build_psymtabs and subsidiaries. | |
2534 | */ | |
2535 | ||
2536 | static void | |
1ab3bf1b JG |
2537 | init_psymbol_list (objfile, total_symbols) |
2538 | struct objfile *objfile; | |
2539 | int total_symbols; | |
35f5886e FF |
2540 | { |
2541 | /* Free any previously allocated psymbol lists. */ | |
2542 | ||
1ab3bf1b | 2543 | if (objfile -> global_psymbols.list) |
35f5886e | 2544 | { |
84ffdec2 | 2545 | mfree (objfile -> md, (PTR)objfile -> global_psymbols.list); |
35f5886e | 2546 | } |
1ab3bf1b | 2547 | if (objfile -> static_psymbols.list) |
35f5886e | 2548 | { |
84ffdec2 | 2549 | mfree (objfile -> md, (PTR)objfile -> static_psymbols.list); |
35f5886e FF |
2550 | } |
2551 | ||
2552 | /* Current best guess is that there are approximately a twentieth | |
2553 | of the total symbols (in a debugging file) are global or static | |
2554 | oriented symbols */ | |
2555 | ||
1ab3bf1b JG |
2556 | objfile -> global_psymbols.size = total_symbols / 10; |
2557 | objfile -> static_psymbols.size = total_symbols / 10; | |
2558 | objfile -> global_psymbols.next = | |
2559 | objfile -> global_psymbols.list = (struct partial_symbol *) | |
318bf84f | 2560 | xmmalloc (objfile -> md, objfile -> global_psymbols.size |
1ab3bf1b JG |
2561 | * sizeof (struct partial_symbol)); |
2562 | objfile -> static_psymbols.next = | |
2563 | objfile -> static_psymbols.list = (struct partial_symbol *) | |
318bf84f | 2564 | xmmalloc (objfile -> md, objfile -> static_psymbols.size |
1ab3bf1b | 2565 | * sizeof (struct partial_symbol)); |
35f5886e FF |
2566 | } |
2567 | ||
35f5886e FF |
2568 | /* |
2569 | ||
715cafcb FF |
2570 | LOCAL FUNCTION |
2571 | ||
2572 | add_enum_psymbol -- add enumeration members to partial symbol table | |
2573 | ||
2574 | DESCRIPTION | |
2575 | ||
2576 | Given pointer to a DIE that is known to be for an enumeration, | |
2577 | extract the symbolic names of the enumeration members and add | |
2578 | partial symbols for them. | |
2579 | */ | |
2580 | ||
2581 | static void | |
1ab3bf1b JG |
2582 | add_enum_psymbol (dip, objfile) |
2583 | struct dieinfo *dip; | |
2584 | struct objfile *objfile; | |
715cafcb FF |
2585 | { |
2586 | char *scan; | |
2587 | char *listend; | |
13b5a7ff FF |
2588 | unsigned short blocksz; |
2589 | int nbytes; | |
715cafcb FF |
2590 | |
2591 | if ((scan = dip -> at_element_list) != NULL) | |
2592 | { | |
2593 | if (dip -> short_element_list) | |
2594 | { | |
13b5a7ff | 2595 | nbytes = attribute_size (AT_short_element_list); |
715cafcb FF |
2596 | } |
2597 | else | |
2598 | { | |
13b5a7ff | 2599 | nbytes = attribute_size (AT_element_list); |
715cafcb | 2600 | } |
13b5a7ff FF |
2601 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); |
2602 | scan += nbytes; | |
2603 | listend = scan + blocksz; | |
715cafcb FF |
2604 | while (scan < listend) |
2605 | { | |
13b5a7ff | 2606 | scan += TARGET_FT_LONG_SIZE (objfile); |
b440b1e9 | 2607 | ADD_PSYMBOL_TO_LIST (scan, strlen (scan), VAR_NAMESPACE, LOC_CONST, |
2e4964ad FF |
2608 | objfile -> static_psymbols, 0, cu_language, |
2609 | objfile); | |
715cafcb FF |
2610 | scan += strlen (scan) + 1; |
2611 | } | |
2612 | } | |
2613 | } | |
2614 | ||
2615 | /* | |
2616 | ||
35f5886e FF |
2617 | LOCAL FUNCTION |
2618 | ||
2619 | add_partial_symbol -- add symbol to partial symbol table | |
2620 | ||
2621 | DESCRIPTION | |
2622 | ||
2623 | Given a DIE, if it is one of the types that we want to | |
2624 | add to a partial symbol table, finish filling in the die info | |
2625 | and then add a partial symbol table entry for it. | |
2626 | ||
95ff889e FF |
2627 | NOTES |
2628 | ||
2629 | The caller must ensure that the DIE has a valid name attribute. | |
35f5886e FF |
2630 | */ |
2631 | ||
2632 | static void | |
1ab3bf1b JG |
2633 | add_partial_symbol (dip, objfile) |
2634 | struct dieinfo *dip; | |
2635 | struct objfile *objfile; | |
35f5886e | 2636 | { |
13b5a7ff | 2637 | switch (dip -> die_tag) |
35f5886e FF |
2638 | { |
2639 | case TAG_global_subroutine: | |
1ab3bf1b JG |
2640 | record_minimal_symbol (dip -> at_name, dip -> at_low_pc, mst_text, |
2641 | objfile); | |
b440b1e9 | 2642 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2643 | VAR_NAMESPACE, LOC_BLOCK, |
2644 | objfile -> global_psymbols, | |
2e4964ad | 2645 | dip -> at_low_pc, cu_language, objfile); |
35f5886e FF |
2646 | break; |
2647 | case TAG_global_variable: | |
1ab3bf1b JG |
2648 | record_minimal_symbol (dip -> at_name, locval (dip -> at_location), |
2649 | mst_data, objfile); | |
b440b1e9 | 2650 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2651 | VAR_NAMESPACE, LOC_STATIC, |
2652 | objfile -> global_psymbols, | |
2e4964ad | 2653 | 0, cu_language, objfile); |
35f5886e FF |
2654 | break; |
2655 | case TAG_subroutine: | |
b440b1e9 | 2656 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2657 | VAR_NAMESPACE, LOC_BLOCK, |
2658 | objfile -> static_psymbols, | |
2e4964ad | 2659 | dip -> at_low_pc, cu_language, objfile); |
35f5886e FF |
2660 | break; |
2661 | case TAG_local_variable: | |
b440b1e9 | 2662 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2663 | VAR_NAMESPACE, LOC_STATIC, |
2664 | objfile -> static_psymbols, | |
2e4964ad | 2665 | 0, cu_language, objfile); |
35f5886e FF |
2666 | break; |
2667 | case TAG_typedef: | |
b440b1e9 | 2668 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2669 | VAR_NAMESPACE, LOC_TYPEDEF, |
2670 | objfile -> static_psymbols, | |
2e4964ad | 2671 | 0, cu_language, objfile); |
35f5886e | 2672 | break; |
95ff889e | 2673 | case TAG_class_type: |
35f5886e FF |
2674 | case TAG_structure_type: |
2675 | case TAG_union_type: | |
95ff889e | 2676 | case TAG_enumeration_type: |
b440b1e9 | 2677 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2678 | STRUCT_NAMESPACE, LOC_TYPEDEF, |
2679 | objfile -> static_psymbols, | |
2e4964ad | 2680 | 0, cu_language, objfile); |
95ff889e | 2681 | if (cu_language == language_cplus) |
715cafcb | 2682 | { |
95ff889e | 2683 | /* For C++, these implicitly act as typedefs as well. */ |
b440b1e9 | 2684 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
95ff889e | 2685 | VAR_NAMESPACE, LOC_TYPEDEF, |
1ab3bf1b | 2686 | objfile -> static_psymbols, |
2e4964ad | 2687 | 0, cu_language, objfile); |
715cafcb | 2688 | } |
715cafcb | 2689 | break; |
35f5886e FF |
2690 | } |
2691 | } | |
2692 | ||
2693 | /* | |
2694 | ||
2695 | LOCAL FUNCTION | |
2696 | ||
2697 | scan_partial_symbols -- scan DIE's within a single compilation unit | |
2698 | ||
2699 | DESCRIPTION | |
2700 | ||
2701 | Process the DIE's within a single compilation unit, looking for | |
2702 | interesting DIE's that contribute to the partial symbol table entry | |
a679650f | 2703 | for this compilation unit. |
35f5886e | 2704 | |
2d6186f4 FF |
2705 | NOTES |
2706 | ||
a679650f FF |
2707 | There are some DIE's that may appear both at file scope and within |
2708 | the scope of a function. We are only interested in the ones at file | |
2709 | scope, and the only way to tell them apart is to keep track of the | |
2710 | scope. For example, consider the test case: | |
2711 | ||
2712 | static int i; | |
2713 | main () { int j; } | |
2714 | ||
2715 | for which the relevant DWARF segment has the structure: | |
2716 | ||
2717 | 0x51: | |
2718 | 0x23 global subrtn sibling 0x9b | |
2719 | name main | |
2720 | fund_type FT_integer | |
2721 | low_pc 0x800004cc | |
2722 | high_pc 0x800004d4 | |
2723 | ||
2724 | 0x74: | |
2725 | 0x23 local var sibling 0x97 | |
2726 | name j | |
2727 | fund_type FT_integer | |
2728 | location OP_BASEREG 0xe | |
2729 | OP_CONST 0xfffffffc | |
2730 | OP_ADD | |
2731 | 0x97: | |
2732 | 0x4 | |
2733 | ||
2734 | 0x9b: | |
2735 | 0x1d local var sibling 0xb8 | |
2736 | name i | |
2737 | fund_type FT_integer | |
2738 | location OP_ADDR 0x800025dc | |
2739 | ||
2740 | 0xb8: | |
2741 | 0x4 | |
2742 | ||
2743 | We want to include the symbol 'i' in the partial symbol table, but | |
2744 | not the symbol 'j'. In essence, we want to skip all the dies within | |
2745 | the scope of a TAG_global_subroutine DIE. | |
2746 | ||
715cafcb FF |
2747 | Don't attempt to add anonymous structures or unions since they have |
2748 | no name. Anonymous enumerations however are processed, because we | |
2749 | want to extract their member names (the check for a tag name is | |
2750 | done later). | |
2d6186f4 | 2751 | |
715cafcb FF |
2752 | Also, for variables and subroutines, check that this is the place |
2753 | where the actual definition occurs, rather than just a reference | |
2754 | to an external. | |
35f5886e FF |
2755 | */ |
2756 | ||
2757 | static void | |
1ab3bf1b JG |
2758 | scan_partial_symbols (thisdie, enddie, objfile) |
2759 | char *thisdie; | |
2760 | char *enddie; | |
2761 | struct objfile *objfile; | |
35f5886e FF |
2762 | { |
2763 | char *nextdie; | |
a679650f | 2764 | char *temp; |
35f5886e FF |
2765 | struct dieinfo di; |
2766 | ||
2767 | while (thisdie < enddie) | |
2768 | { | |
95967e73 | 2769 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2770 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2771 | { |
2772 | break; | |
2773 | } | |
2774 | else | |
2775 | { | |
13b5a7ff | 2776 | nextdie = thisdie + di.die_length; |
715cafcb FF |
2777 | /* To avoid getting complete die information for every die, we |
2778 | only do it (below) for the cases we are interested in. */ | |
13b5a7ff | 2779 | switch (di.die_tag) |
35f5886e FF |
2780 | { |
2781 | case TAG_global_subroutine: | |
35f5886e | 2782 | case TAG_subroutine: |
a679650f FF |
2783 | completedieinfo (&di, objfile); |
2784 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2785 | { | |
2786 | add_partial_symbol (&di, objfile); | |
2787 | /* If there is a sibling attribute, adjust the nextdie | |
2788 | pointer to skip the entire scope of the subroutine. | |
2789 | Apply some sanity checking to make sure we don't | |
2790 | overrun or underrun the range of remaining DIE's */ | |
2791 | if (di.at_sibling != 0) | |
2792 | { | |
2793 | temp = dbbase + di.at_sibling - dbroff; | |
2794 | if ((temp < thisdie) || (temp >= enddie)) | |
2795 | { | |
51b80b00 FF |
2796 | complain (&bad_die_ref, DIE_ID, DIE_NAME, |
2797 | di.at_sibling); | |
a679650f FF |
2798 | } |
2799 | else | |
2800 | { | |
2801 | nextdie = temp; | |
2802 | } | |
2803 | } | |
2804 | } | |
2805 | break; | |
2d6186f4 | 2806 | case TAG_global_variable: |
35f5886e | 2807 | case TAG_local_variable: |
95967e73 | 2808 | completedieinfo (&di, objfile); |
2d6186f4 FF |
2809 | if (di.at_name && (di.has_at_low_pc || di.at_location)) |
2810 | { | |
1ab3bf1b | 2811 | add_partial_symbol (&di, objfile); |
2d6186f4 FF |
2812 | } |
2813 | break; | |
35f5886e | 2814 | case TAG_typedef: |
95ff889e | 2815 | case TAG_class_type: |
35f5886e FF |
2816 | case TAG_structure_type: |
2817 | case TAG_union_type: | |
95967e73 | 2818 | completedieinfo (&di, objfile); |
2d6186f4 | 2819 | if (di.at_name) |
35f5886e | 2820 | { |
1ab3bf1b | 2821 | add_partial_symbol (&di, objfile); |
35f5886e FF |
2822 | } |
2823 | break; | |
715cafcb | 2824 | case TAG_enumeration_type: |
95967e73 | 2825 | completedieinfo (&di, objfile); |
95ff889e FF |
2826 | if (di.at_name) |
2827 | { | |
2828 | add_partial_symbol (&di, objfile); | |
2829 | } | |
2830 | add_enum_psymbol (&di, objfile); | |
715cafcb | 2831 | break; |
35f5886e FF |
2832 | } |
2833 | } | |
2834 | thisdie = nextdie; | |
2835 | } | |
2836 | } | |
2837 | ||
2838 | /* | |
2839 | ||
2840 | LOCAL FUNCTION | |
2841 | ||
2842 | scan_compilation_units -- build a psymtab entry for each compilation | |
2843 | ||
2844 | DESCRIPTION | |
2845 | ||
2846 | This is the top level dwarf parsing routine for building partial | |
2847 | symbol tables. | |
2848 | ||
2849 | It scans from the beginning of the DWARF table looking for the first | |
2850 | TAG_compile_unit DIE, and then follows the sibling chain to locate | |
2851 | each additional TAG_compile_unit DIE. | |
2852 | ||
2853 | For each TAG_compile_unit DIE it creates a partial symtab structure, | |
2854 | calls a subordinate routine to collect all the compilation unit's | |
2855 | global DIE's, file scope DIEs, typedef DIEs, etc, and then links the | |
2856 | new partial symtab structure into the partial symbol table. It also | |
2857 | records the appropriate information in the partial symbol table entry | |
2858 | to allow the chunk of DIE's and line number table for this compilation | |
2859 | unit to be located and re-read later, to generate a complete symbol | |
2860 | table entry for the compilation unit. | |
2861 | ||
2862 | Thus it effectively partitions up a chunk of DIE's for multiple | |
2863 | compilation units into smaller DIE chunks and line number tables, | |
2864 | and associates them with a partial symbol table entry. | |
2865 | ||
2866 | NOTES | |
2867 | ||
2868 | If any compilation unit has no line number table associated with | |
2869 | it for some reason (a missing at_stmt_list attribute, rather than | |
2870 | just one with a value of zero, which is valid) then we ensure that | |
2871 | the recorded file offset is zero so that the routine which later | |
2872 | reads line number table fragments knows that there is no fragment | |
2873 | to read. | |
2874 | ||
2875 | RETURNS | |
2876 | ||
2877 | Returns no value. | |
2878 | ||
2879 | */ | |
2880 | ||
2881 | static void | |
d5931d79 | 2882 | scan_compilation_units (thisdie, enddie, dbfoff, lnoffset, objfile) |
1ab3bf1b JG |
2883 | char *thisdie; |
2884 | char *enddie; | |
d5931d79 JG |
2885 | file_ptr dbfoff; |
2886 | file_ptr lnoffset; | |
1ab3bf1b | 2887 | struct objfile *objfile; |
35f5886e FF |
2888 | { |
2889 | char *nextdie; | |
2890 | struct dieinfo di; | |
2891 | struct partial_symtab *pst; | |
2892 | int culength; | |
2893 | int curoff; | |
d5931d79 | 2894 | file_ptr curlnoffset; |
35f5886e FF |
2895 | |
2896 | while (thisdie < enddie) | |
2897 | { | |
95967e73 | 2898 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2899 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2900 | { |
2901 | break; | |
2902 | } | |
13b5a7ff | 2903 | else if (di.die_tag != TAG_compile_unit) |
35f5886e | 2904 | { |
13b5a7ff | 2905 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2906 | } |
2907 | else | |
2908 | { | |
95967e73 | 2909 | completedieinfo (&di, objfile); |
95ff889e | 2910 | set_cu_language (&di); |
35f5886e FF |
2911 | if (di.at_sibling != 0) |
2912 | { | |
2913 | nextdie = dbbase + di.at_sibling - dbroff; | |
2914 | } | |
2915 | else | |
2916 | { | |
13b5a7ff | 2917 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2918 | } |
2919 | curoff = thisdie - dbbase; | |
2920 | culength = nextdie - thisdie; | |
2d6186f4 | 2921 | curlnoffset = di.has_at_stmt_list ? lnoffset + di.at_stmt_list : 0; |
1ab3bf1b JG |
2922 | |
2923 | /* First allocate a new partial symbol table structure */ | |
2924 | ||
95ff889e FF |
2925 | pst = start_psymtab_common (objfile, base_section_offsets, |
2926 | di.at_name, di.at_low_pc, | |
1ab3bf1b JG |
2927 | objfile -> global_psymbols.next, |
2928 | objfile -> static_psymbols.next); | |
2929 | ||
2930 | pst -> texthigh = di.at_high_pc; | |
2931 | pst -> read_symtab_private = (char *) | |
2932 | obstack_alloc (&objfile -> psymbol_obstack, | |
2933 | sizeof (struct dwfinfo)); | |
2934 | DBFOFF (pst) = dbfoff; | |
2935 | DBROFF (pst) = curoff; | |
2936 | DBLENGTH (pst) = culength; | |
2937 | LNFOFF (pst) = curlnoffset; | |
2938 | pst -> read_symtab = dwarf_psymtab_to_symtab; | |
2939 | ||
2940 | /* Now look for partial symbols */ | |
2941 | ||
13b5a7ff | 2942 | scan_partial_symbols (thisdie + di.die_length, nextdie, objfile); |
1ab3bf1b JG |
2943 | |
2944 | pst -> n_global_syms = objfile -> global_psymbols.next - | |
2945 | (objfile -> global_psymbols.list + pst -> globals_offset); | |
2946 | pst -> n_static_syms = objfile -> static_psymbols.next - | |
2947 | (objfile -> static_psymbols.list + pst -> statics_offset); | |
2948 | sort_pst_symbols (pst); | |
35f5886e FF |
2949 | /* If there is already a psymtab or symtab for a file of this name, |
2950 | remove it. (If there is a symtab, more drastic things also | |
2951 | happen.) This happens in VxWorks. */ | |
2952 | free_named_symtabs (pst -> filename); | |
35f5886e FF |
2953 | } |
2954 | thisdie = nextdie; | |
2955 | } | |
2956 | } | |
2957 | ||
2958 | /* | |
2959 | ||
2960 | LOCAL FUNCTION | |
2961 | ||
2962 | new_symbol -- make a symbol table entry for a new symbol | |
2963 | ||
2964 | SYNOPSIS | |
2965 | ||
1ab3bf1b JG |
2966 | static struct symbol *new_symbol (struct dieinfo *dip, |
2967 | struct objfile *objfile) | |
35f5886e FF |
2968 | |
2969 | DESCRIPTION | |
2970 | ||
2971 | Given a pointer to a DWARF information entry, figure out if we need | |
2972 | to make a symbol table entry for it, and if so, create a new entry | |
2973 | and return a pointer to it. | |
2974 | */ | |
2975 | ||
2976 | static struct symbol * | |
1ab3bf1b JG |
2977 | new_symbol (dip, objfile) |
2978 | struct dieinfo *dip; | |
2979 | struct objfile *objfile; | |
35f5886e FF |
2980 | { |
2981 | struct symbol *sym = NULL; | |
2982 | ||
2983 | if (dip -> at_name != NULL) | |
2984 | { | |
1ab3bf1b | 2985 | sym = (struct symbol *) obstack_alloc (&objfile -> symbol_obstack, |
35f5886e | 2986 | sizeof (struct symbol)); |
4ed3a9ea | 2987 | memset (sym, 0, sizeof (struct symbol)); |
95ff889e FF |
2988 | SYMBOL_NAME (sym) = create_name (dip -> at_name, |
2989 | &objfile->symbol_obstack); | |
35f5886e FF |
2990 | /* default assumptions */ |
2991 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2992 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2993 | SYMBOL_TYPE (sym) = decode_die_type (dip); | |
2e4964ad FF |
2994 | |
2995 | /* If this symbol is from a C++ compilation, then attempt to cache the | |
2996 | demangled form for future reference. This is a typical time versus | |
2997 | space tradeoff, that was decided in favor of time because it sped up | |
2998 | C++ symbol lookups by a factor of about 20. */ | |
2999 | ||
3000 | SYMBOL_LANGUAGE (sym) = cu_language; | |
7532cf10 | 3001 | SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile -> symbol_obstack); |
13b5a7ff | 3002 | switch (dip -> die_tag) |
35f5886e FF |
3003 | { |
3004 | case TAG_label: | |
4d315a07 | 3005 | SYMBOL_VALUE (sym) = dip -> at_low_pc; |
35f5886e FF |
3006 | SYMBOL_CLASS (sym) = LOC_LABEL; |
3007 | break; | |
3008 | case TAG_global_subroutine: | |
3009 | case TAG_subroutine: | |
4d315a07 | 3010 | SYMBOL_VALUE (sym) = dip -> at_low_pc; |
35f5886e FF |
3011 | SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym)); |
3012 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
13b5a7ff | 3013 | if (dip -> die_tag == TAG_global_subroutine) |
35f5886e FF |
3014 | { |
3015 | add_symbol_to_list (sym, &global_symbols); | |
3016 | } | |
3017 | else | |
3018 | { | |
4d315a07 | 3019 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
3020 | } |
3021 | break; | |
3022 | case TAG_global_variable: | |
35f5886e FF |
3023 | if (dip -> at_location != NULL) |
3024 | { | |
3025 | SYMBOL_VALUE (sym) = locval (dip -> at_location); | |
35f5886e FF |
3026 | add_symbol_to_list (sym, &global_symbols); |
3027 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
3028 | SYMBOL_VALUE (sym) += baseaddr; | |
3029 | } | |
a5bd5ba6 FF |
3030 | break; |
3031 | case TAG_local_variable: | |
3032 | if (dip -> at_location != NULL) | |
35f5886e | 3033 | { |
a5bd5ba6 | 3034 | SYMBOL_VALUE (sym) = locval (dip -> at_location); |
4d315a07 | 3035 | add_symbol_to_list (sym, list_in_scope); |
a5bd5ba6 FF |
3036 | if (isreg) |
3037 | { | |
3038 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
3039 | } | |
3040 | else if (offreg) | |
35f5886e | 3041 | { |
a5bd5ba6 | 3042 | SYMBOL_CLASS (sym) = LOC_LOCAL; |
35f5886e FF |
3043 | } |
3044 | else | |
3045 | { | |
3046 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
3047 | SYMBOL_VALUE (sym) += baseaddr; | |
3048 | } | |
3049 | } | |
3050 | break; | |
3051 | case TAG_formal_parameter: | |
3052 | if (dip -> at_location != NULL) | |
3053 | { | |
3054 | SYMBOL_VALUE (sym) = locval (dip -> at_location); | |
3055 | } | |
4d315a07 | 3056 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
3057 | if (isreg) |
3058 | { | |
3059 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
3060 | } | |
3061 | else | |
3062 | { | |
3063 | SYMBOL_CLASS (sym) = LOC_ARG; | |
3064 | } | |
3065 | break; | |
3066 | case TAG_unspecified_parameters: | |
3067 | /* From varargs functions; gdb doesn't seem to have any interest in | |
3068 | this information, so just ignore it for now. (FIXME?) */ | |
3069 | break; | |
95ff889e | 3070 | case TAG_class_type: |
35f5886e FF |
3071 | case TAG_structure_type: |
3072 | case TAG_union_type: | |
3073 | case TAG_enumeration_type: | |
3074 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3075 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
4d315a07 | 3076 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
3077 | break; |
3078 | case TAG_typedef: | |
3079 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3080 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
4d315a07 | 3081 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
3082 | break; |
3083 | default: | |
3084 | /* Not a tag we recognize. Hopefully we aren't processing trash | |
3085 | data, but since we must specifically ignore things we don't | |
3086 | recognize, there is nothing else we should do at this point. */ | |
3087 | break; | |
3088 | } | |
3089 | } | |
3090 | return (sym); | |
3091 | } | |
3092 | ||
3093 | /* | |
3094 | ||
95ff889e FF |
3095 | LOCAL FUNCTION |
3096 | ||
3097 | synthesize_typedef -- make a symbol table entry for a "fake" typedef | |
3098 | ||
3099 | SYNOPSIS | |
3100 | ||
3101 | static void synthesize_typedef (struct dieinfo *dip, | |
3102 | struct objfile *objfile, | |
3103 | struct type *type); | |
3104 | ||
3105 | DESCRIPTION | |
3106 | ||
3107 | Given a pointer to a DWARF information entry, synthesize a typedef | |
3108 | for the name in the DIE, using the specified type. | |
3109 | ||
3110 | This is used for C++ class, structs, unions, and enumerations to | |
3111 | set up the tag name as a type. | |
3112 | ||
3113 | */ | |
3114 | ||
3115 | static void | |
3116 | synthesize_typedef (dip, objfile, type) | |
3117 | struct dieinfo *dip; | |
3118 | struct objfile *objfile; | |
3119 | struct type *type; | |
3120 | { | |
3121 | struct symbol *sym = NULL; | |
3122 | ||
3123 | if (dip -> at_name != NULL) | |
3124 | { | |
3125 | sym = (struct symbol *) | |
3126 | obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symbol)); | |
3127 | memset (sym, 0, sizeof (struct symbol)); | |
3128 | SYMBOL_NAME (sym) = create_name (dip -> at_name, | |
3129 | &objfile->symbol_obstack); | |
7532cf10 | 3130 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); |
95ff889e FF |
3131 | SYMBOL_TYPE (sym) = type; |
3132 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3133 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
3134 | add_symbol_to_list (sym, list_in_scope); | |
3135 | } | |
3136 | } | |
3137 | ||
3138 | /* | |
3139 | ||
35f5886e FF |
3140 | LOCAL FUNCTION |
3141 | ||
3142 | decode_mod_fund_type -- decode a modified fundamental type | |
3143 | ||
3144 | SYNOPSIS | |
3145 | ||
3146 | static struct type *decode_mod_fund_type (char *typedata) | |
3147 | ||
3148 | DESCRIPTION | |
3149 | ||
3150 | Decode a block of data containing a modified fundamental | |
3151 | type specification. TYPEDATA is a pointer to the block, | |
13b5a7ff FF |
3152 | which starts with a length containing the size of the rest |
3153 | of the block. At the end of the block is a fundmental type | |
3154 | code value that gives the fundamental type. Everything | |
35f5886e FF |
3155 | in between are type modifiers. |
3156 | ||
3157 | We simply compute the number of modifiers and call the general | |
3158 | function decode_modified_type to do the actual work. | |
3159 | */ | |
3160 | ||
3161 | static struct type * | |
1ab3bf1b JG |
3162 | decode_mod_fund_type (typedata) |
3163 | char *typedata; | |
35f5886e FF |
3164 | { |
3165 | struct type *typep = NULL; | |
3166 | unsigned short modcount; | |
13b5a7ff | 3167 | int nbytes; |
35f5886e FF |
3168 | |
3169 | /* Get the total size of the block, exclusive of the size itself */ | |
13b5a7ff FF |
3170 | |
3171 | nbytes = attribute_size (AT_mod_fund_type); | |
3172 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3173 | typedata += nbytes; | |
3174 | ||
35f5886e | 3175 | /* Deduct the size of the fundamental type bytes at the end of the block. */ |
13b5a7ff FF |
3176 | |
3177 | modcount -= attribute_size (AT_fund_type); | |
3178 | ||
35f5886e | 3179 | /* Now do the actual decoding */ |
13b5a7ff FF |
3180 | |
3181 | typep = decode_modified_type (typedata, modcount, AT_mod_fund_type); | |
35f5886e FF |
3182 | return (typep); |
3183 | } | |
3184 | ||
3185 | /* | |
3186 | ||
3187 | LOCAL FUNCTION | |
3188 | ||
3189 | decode_mod_u_d_type -- decode a modified user defined type | |
3190 | ||
3191 | SYNOPSIS | |
3192 | ||
3193 | static struct type *decode_mod_u_d_type (char *typedata) | |
3194 | ||
3195 | DESCRIPTION | |
3196 | ||
3197 | Decode a block of data containing a modified user defined | |
3198 | type specification. TYPEDATA is a pointer to the block, | |
3199 | which consists of a two byte length, containing the size | |
3200 | of the rest of the block. At the end of the block is a | |
3201 | four byte value that gives a reference to a user defined type. | |
3202 | Everything in between are type modifiers. | |
3203 | ||
3204 | We simply compute the number of modifiers and call the general | |
3205 | function decode_modified_type to do the actual work. | |
3206 | */ | |
3207 | ||
3208 | static struct type * | |
1ab3bf1b JG |
3209 | decode_mod_u_d_type (typedata) |
3210 | char *typedata; | |
35f5886e FF |
3211 | { |
3212 | struct type *typep = NULL; | |
3213 | unsigned short modcount; | |
13b5a7ff | 3214 | int nbytes; |
35f5886e FF |
3215 | |
3216 | /* Get the total size of the block, exclusive of the size itself */ | |
13b5a7ff FF |
3217 | |
3218 | nbytes = attribute_size (AT_mod_u_d_type); | |
3219 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3220 | typedata += nbytes; | |
3221 | ||
35f5886e | 3222 | /* Deduct the size of the reference type bytes at the end of the block. */ |
13b5a7ff FF |
3223 | |
3224 | modcount -= attribute_size (AT_user_def_type); | |
3225 | ||
35f5886e | 3226 | /* Now do the actual decoding */ |
13b5a7ff FF |
3227 | |
3228 | typep = decode_modified_type (typedata, modcount, AT_mod_u_d_type); | |
35f5886e FF |
3229 | return (typep); |
3230 | } | |
3231 | ||
3232 | /* | |
3233 | ||
3234 | LOCAL FUNCTION | |
3235 | ||
3236 | decode_modified_type -- decode modified user or fundamental type | |
3237 | ||
3238 | SYNOPSIS | |
3239 | ||
1c92ca6f | 3240 | static struct type *decode_modified_type (char *modifiers, |
35f5886e FF |
3241 | unsigned short modcount, int mtype) |
3242 | ||
3243 | DESCRIPTION | |
3244 | ||
3245 | Decode a modified type, either a modified fundamental type or | |
3246 | a modified user defined type. MODIFIERS is a pointer to the | |
3247 | block of bytes that define MODCOUNT modifiers. Immediately | |
3248 | following the last modifier is a short containing the fundamental | |
3249 | type or a long containing the reference to the user defined | |
3250 | type. Which one is determined by MTYPE, which is either | |
3251 | AT_mod_fund_type or AT_mod_u_d_type to indicate what modified | |
3252 | type we are generating. | |
3253 | ||
3254 | We call ourself recursively to generate each modified type,` | |
3255 | until MODCOUNT reaches zero, at which point we have consumed | |
3256 | all the modifiers and generate either the fundamental type or | |
3257 | user defined type. When the recursion unwinds, each modifier | |
3258 | is applied in turn to generate the full modified type. | |
3259 | ||
3260 | NOTES | |
3261 | ||
3262 | If we find a modifier that we don't recognize, and it is not one | |
3263 | of those reserved for application specific use, then we issue a | |
3264 | warning and simply ignore the modifier. | |
3265 | ||
3266 | BUGS | |
3267 | ||
3268 | We currently ignore MOD_const and MOD_volatile. (FIXME) | |
3269 | ||
3270 | */ | |
3271 | ||
3272 | static struct type * | |
1ab3bf1b | 3273 | decode_modified_type (modifiers, modcount, mtype) |
1c92ca6f | 3274 | char *modifiers; |
1ab3bf1b JG |
3275 | unsigned int modcount; |
3276 | int mtype; | |
35f5886e FF |
3277 | { |
3278 | struct type *typep = NULL; | |
3279 | unsigned short fundtype; | |
13b5a7ff | 3280 | DIE_REF die_ref; |
1c92ca6f | 3281 | char modifier; |
13b5a7ff | 3282 | int nbytes; |
35f5886e FF |
3283 | |
3284 | if (modcount == 0) | |
3285 | { | |
3286 | switch (mtype) | |
3287 | { | |
3288 | case AT_mod_fund_type: | |
13b5a7ff FF |
3289 | nbytes = attribute_size (AT_fund_type); |
3290 | fundtype = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3291 | current_objfile); | |
35f5886e FF |
3292 | typep = decode_fund_type (fundtype); |
3293 | break; | |
3294 | case AT_mod_u_d_type: | |
13b5a7ff FF |
3295 | nbytes = attribute_size (AT_user_def_type); |
3296 | die_ref = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3297 | current_objfile); | |
3298 | if ((typep = lookup_utype (die_ref)) == NULL) | |
35f5886e | 3299 | { |
13b5a7ff | 3300 | typep = alloc_utype (die_ref, NULL); |
35f5886e FF |
3301 | } |
3302 | break; | |
3303 | default: | |
51b80b00 | 3304 | complain (&botched_modified_type, DIE_ID, DIE_NAME, mtype); |
bf229b4e | 3305 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
35f5886e FF |
3306 | break; |
3307 | } | |
3308 | } | |
3309 | else | |
3310 | { | |
3311 | modifier = *modifiers++; | |
3312 | typep = decode_modified_type (modifiers, --modcount, mtype); | |
3313 | switch (modifier) | |
3314 | { | |
13b5a7ff FF |
3315 | case MOD_pointer_to: |
3316 | typep = lookup_pointer_type (typep); | |
3317 | break; | |
3318 | case MOD_reference_to: | |
3319 | typep = lookup_reference_type (typep); | |
3320 | break; | |
3321 | case MOD_const: | |
51b80b00 | 3322 | complain (&const_ignored, DIE_ID, DIE_NAME); /* FIXME */ |
13b5a7ff FF |
3323 | break; |
3324 | case MOD_volatile: | |
51b80b00 | 3325 | complain (&volatile_ignored, DIE_ID, DIE_NAME); /* FIXME */ |
13b5a7ff FF |
3326 | break; |
3327 | default: | |
1c92ca6f FF |
3328 | if (!(MOD_lo_user <= (unsigned char) modifier |
3329 | && (unsigned char) modifier <= MOD_hi_user)) | |
13b5a7ff | 3330 | { |
51b80b00 | 3331 | complain (&unknown_type_modifier, DIE_ID, DIE_NAME, modifier); |
13b5a7ff FF |
3332 | } |
3333 | break; | |
35f5886e FF |
3334 | } |
3335 | } | |
3336 | return (typep); | |
3337 | } | |
3338 | ||
3339 | /* | |
3340 | ||
3341 | LOCAL FUNCTION | |
3342 | ||
3343 | decode_fund_type -- translate basic DWARF type to gdb base type | |
3344 | ||
3345 | DESCRIPTION | |
3346 | ||
3347 | Given an integer that is one of the fundamental DWARF types, | |
3348 | translate it to one of the basic internal gdb types and return | |
3349 | a pointer to the appropriate gdb type (a "struct type *"). | |
3350 | ||
3351 | NOTES | |
3352 | ||
85f0a848 FF |
3353 | For robustness, if we are asked to translate a fundamental |
3354 | type that we are unprepared to deal with, we return int so | |
3355 | callers can always depend upon a valid type being returned, | |
3356 | and so gdb may at least do something reasonable by default. | |
3357 | If the type is not in the range of those types defined as | |
3358 | application specific types, we also issue a warning. | |
35f5886e FF |
3359 | */ |
3360 | ||
3361 | static struct type * | |
1ab3bf1b JG |
3362 | decode_fund_type (fundtype) |
3363 | unsigned int fundtype; | |
35f5886e FF |
3364 | { |
3365 | struct type *typep = NULL; | |
3366 | ||
3367 | switch (fundtype) | |
3368 | { | |
3369 | ||
3370 | case FT_void: | |
bf229b4e | 3371 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); |
35f5886e FF |
3372 | break; |
3373 | ||
1ab3bf1b | 3374 | case FT_boolean: /* Was FT_set in AT&T version */ |
bf229b4e | 3375 | typep = dwarf_fundamental_type (current_objfile, FT_BOOLEAN); |
1ab3bf1b JG |
3376 | break; |
3377 | ||
35f5886e | 3378 | case FT_pointer: /* (void *) */ |
bf229b4e | 3379 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); |
1ab3bf1b | 3380 | typep = lookup_pointer_type (typep); |
35f5886e FF |
3381 | break; |
3382 | ||
3383 | case FT_char: | |
bf229b4e | 3384 | typep = dwarf_fundamental_type (current_objfile, FT_CHAR); |
1ab3bf1b JG |
3385 | break; |
3386 | ||
35f5886e | 3387 | case FT_signed_char: |
bf229b4e | 3388 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_CHAR); |
1ab3bf1b JG |
3389 | break; |
3390 | ||
3391 | case FT_unsigned_char: | |
bf229b4e | 3392 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); |
35f5886e FF |
3393 | break; |
3394 | ||
3395 | case FT_short: | |
bf229b4e | 3396 | typep = dwarf_fundamental_type (current_objfile, FT_SHORT); |
1ab3bf1b JG |
3397 | break; |
3398 | ||
35f5886e | 3399 | case FT_signed_short: |
bf229b4e | 3400 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_SHORT); |
1ab3bf1b JG |
3401 | break; |
3402 | ||
3403 | case FT_unsigned_short: | |
bf229b4e | 3404 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); |
35f5886e FF |
3405 | break; |
3406 | ||
3407 | case FT_integer: | |
bf229b4e | 3408 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1ab3bf1b JG |
3409 | break; |
3410 | ||
35f5886e | 3411 | case FT_signed_integer: |
bf229b4e | 3412 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_INTEGER); |
1ab3bf1b JG |
3413 | break; |
3414 | ||
3415 | case FT_unsigned_integer: | |
bf229b4e | 3416 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); |
35f5886e FF |
3417 | break; |
3418 | ||
3419 | case FT_long: | |
bf229b4e | 3420 | typep = dwarf_fundamental_type (current_objfile, FT_LONG); |
1ab3bf1b JG |
3421 | break; |
3422 | ||
35f5886e | 3423 | case FT_signed_long: |
bf229b4e | 3424 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG); |
35f5886e FF |
3425 | break; |
3426 | ||
1ab3bf1b | 3427 | case FT_unsigned_long: |
bf229b4e | 3428 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG); |
35f5886e FF |
3429 | break; |
3430 | ||
1ab3bf1b | 3431 | case FT_long_long: |
bf229b4e | 3432 | typep = dwarf_fundamental_type (current_objfile, FT_LONG_LONG); |
35f5886e | 3433 | break; |
1ab3bf1b JG |
3434 | |
3435 | case FT_signed_long_long: | |
bf229b4e | 3436 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG_LONG); |
35f5886e | 3437 | break; |
1ab3bf1b JG |
3438 | |
3439 | case FT_unsigned_long_long: | |
bf229b4e | 3440 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); |
35f5886e | 3441 | break; |
1ab3bf1b JG |
3442 | |
3443 | case FT_float: | |
bf229b4e | 3444 | typep = dwarf_fundamental_type (current_objfile, FT_FLOAT); |
35f5886e FF |
3445 | break; |
3446 | ||
1ab3bf1b | 3447 | case FT_dbl_prec_float: |
bf229b4e | 3448 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); |
35f5886e FF |
3449 | break; |
3450 | ||
3451 | case FT_ext_prec_float: | |
bf229b4e | 3452 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); |
35f5886e FF |
3453 | break; |
3454 | ||
3455 | case FT_complex: | |
bf229b4e | 3456 | typep = dwarf_fundamental_type (current_objfile, FT_COMPLEX); |
35f5886e FF |
3457 | break; |
3458 | ||
3459 | case FT_dbl_prec_complex: | |
bf229b4e | 3460 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_COMPLEX); |
35f5886e FF |
3461 | break; |
3462 | ||
1ab3bf1b | 3463 | case FT_ext_prec_complex: |
bf229b4e | 3464 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_COMPLEX); |
35f5886e | 3465 | break; |
1ab3bf1b | 3466 | |
35f5886e FF |
3467 | } |
3468 | ||
85f0a848 | 3469 | if (typep == NULL) |
35f5886e | 3470 | { |
85f0a848 FF |
3471 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
3472 | if (!(FT_lo_user <= fundtype && fundtype <= FT_hi_user)) | |
3473 | { | |
51b80b00 | 3474 | complain (&unexpected_fund_type, DIE_ID, DIE_NAME, fundtype); |
85f0a848 | 3475 | } |
35f5886e FF |
3476 | } |
3477 | ||
3478 | return (typep); | |
3479 | } | |
3480 | ||
3481 | /* | |
3482 | ||
3483 | LOCAL FUNCTION | |
3484 | ||
3485 | create_name -- allocate a fresh copy of a string on an obstack | |
3486 | ||
3487 | DESCRIPTION | |
3488 | ||
3489 | Given a pointer to a string and a pointer to an obstack, allocates | |
3490 | a fresh copy of the string on the specified obstack. | |
3491 | ||
3492 | */ | |
3493 | ||
3494 | static char * | |
1ab3bf1b JG |
3495 | create_name (name, obstackp) |
3496 | char *name; | |
3497 | struct obstack *obstackp; | |
35f5886e FF |
3498 | { |
3499 | int length; | |
3500 | char *newname; | |
3501 | ||
3502 | length = strlen (name) + 1; | |
3503 | newname = (char *) obstack_alloc (obstackp, length); | |
4ed3a9ea | 3504 | strcpy (newname, name); |
35f5886e FF |
3505 | return (newname); |
3506 | } | |
3507 | ||
3508 | /* | |
3509 | ||
3510 | LOCAL FUNCTION | |
3511 | ||
3512 | basicdieinfo -- extract the minimal die info from raw die data | |
3513 | ||
3514 | SYNOPSIS | |
3515 | ||
95967e73 FF |
3516 | void basicdieinfo (char *diep, struct dieinfo *dip, |
3517 | struct objfile *objfile) | |
35f5886e FF |
3518 | |
3519 | DESCRIPTION | |
3520 | ||
3521 | Given a pointer to raw DIE data, and a pointer to an instance of a | |
3522 | die info structure, this function extracts the basic information | |
3523 | from the DIE data required to continue processing this DIE, along | |
3524 | with some bookkeeping information about the DIE. | |
3525 | ||
3526 | The information we absolutely must have includes the DIE tag, | |
3527 | and the DIE length. If we need the sibling reference, then we | |
3528 | will have to call completedieinfo() to process all the remaining | |
3529 | DIE information. | |
3530 | ||
3531 | Note that since there is no guarantee that the data is properly | |
3532 | aligned in memory for the type of access required (indirection | |
95967e73 FF |
3533 | through anything other than a char pointer), and there is no |
3534 | guarantee that it is in the same byte order as the gdb host, | |
3535 | we call a function which deals with both alignment and byte | |
3536 | swapping issues. Possibly inefficient, but quite portable. | |
35f5886e FF |
3537 | |
3538 | We also take care of some other basic things at this point, such | |
3539 | as ensuring that the instance of the die info structure starts | |
3540 | out completely zero'd and that curdie is initialized for use | |
3541 | in error reporting if we have a problem with the current die. | |
3542 | ||
3543 | NOTES | |
3544 | ||
3545 | All DIE's must have at least a valid length, thus the minimum | |
13b5a7ff FF |
3546 | DIE size is SIZEOF_DIE_LENGTH. In order to have a valid tag, the |
3547 | DIE size must be at least SIZEOF_DIE_TAG larger, otherwise they | |
35f5886e FF |
3548 | are forced to be TAG_padding DIES. |
3549 | ||
13b5a7ff FF |
3550 | Padding DIES must be at least SIZEOF_DIE_LENGTH in length, implying |
3551 | that if a padding DIE is used for alignment and the amount needed is | |
3552 | less than SIZEOF_DIE_LENGTH, then the padding DIE has to be big | |
3553 | enough to align to the next alignment boundry. | |
4090fe1c FF |
3554 | |
3555 | We do some basic sanity checking here, such as verifying that the | |
3556 | length of the die would not cause it to overrun the recorded end of | |
3557 | the buffer holding the DIE info. If we find a DIE that is either | |
3558 | too small or too large, we force it's length to zero which should | |
3559 | cause the caller to take appropriate action. | |
35f5886e FF |
3560 | */ |
3561 | ||
3562 | static void | |
95967e73 | 3563 | basicdieinfo (dip, diep, objfile) |
1ab3bf1b JG |
3564 | struct dieinfo *dip; |
3565 | char *diep; | |
95967e73 | 3566 | struct objfile *objfile; |
35f5886e FF |
3567 | { |
3568 | curdie = dip; | |
4ed3a9ea | 3569 | memset (dip, 0, sizeof (struct dieinfo)); |
35f5886e | 3570 | dip -> die = diep; |
13b5a7ff FF |
3571 | dip -> die_ref = dbroff + (diep - dbbase); |
3572 | dip -> die_length = target_to_host (diep, SIZEOF_DIE_LENGTH, GET_UNSIGNED, | |
3573 | objfile); | |
4090fe1c FF |
3574 | if ((dip -> die_length < SIZEOF_DIE_LENGTH) || |
3575 | ((diep + dip -> die_length) > (dbbase + dbsize))) | |
35f5886e | 3576 | { |
51b80b00 | 3577 | complain (&malformed_die, DIE_ID, DIE_NAME, dip -> die_length); |
4090fe1c | 3578 | dip -> die_length = 0; |
35f5886e | 3579 | } |
13b5a7ff | 3580 | else if (dip -> die_length < (SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG)) |
35f5886e | 3581 | { |
13b5a7ff | 3582 | dip -> die_tag = TAG_padding; |
35f5886e FF |
3583 | } |
3584 | else | |
3585 | { | |
13b5a7ff FF |
3586 | diep += SIZEOF_DIE_LENGTH; |
3587 | dip -> die_tag = target_to_host (diep, SIZEOF_DIE_TAG, GET_UNSIGNED, | |
3588 | objfile); | |
35f5886e FF |
3589 | } |
3590 | } | |
3591 | ||
3592 | /* | |
3593 | ||
3594 | LOCAL FUNCTION | |
3595 | ||
3596 | completedieinfo -- finish reading the information for a given DIE | |
3597 | ||
3598 | SYNOPSIS | |
3599 | ||
95967e73 | 3600 | void completedieinfo (struct dieinfo *dip, struct objfile *objfile) |
35f5886e FF |
3601 | |
3602 | DESCRIPTION | |
3603 | ||
3604 | Given a pointer to an already partially initialized die info structure, | |
3605 | scan the raw DIE data and finish filling in the die info structure | |
3606 | from the various attributes found. | |
3607 | ||
3608 | Note that since there is no guarantee that the data is properly | |
3609 | aligned in memory for the type of access required (indirection | |
95967e73 FF |
3610 | through anything other than a char pointer), and there is no |
3611 | guarantee that it is in the same byte order as the gdb host, | |
3612 | we call a function which deals with both alignment and byte | |
3613 | swapping issues. Possibly inefficient, but quite portable. | |
35f5886e FF |
3614 | |
3615 | NOTES | |
3616 | ||
3617 | Each time we are called, we increment the diecount variable, which | |
3618 | keeps an approximate count of the number of dies processed for | |
3619 | each compilation unit. This information is presented to the user | |
3620 | if the info_verbose flag is set. | |
3621 | ||
3622 | */ | |
3623 | ||
3624 | static void | |
95967e73 | 3625 | completedieinfo (dip, objfile) |
1ab3bf1b | 3626 | struct dieinfo *dip; |
95967e73 | 3627 | struct objfile *objfile; |
35f5886e FF |
3628 | { |
3629 | char *diep; /* Current pointer into raw DIE data */ | |
3630 | char *end; /* Terminate DIE scan here */ | |
3631 | unsigned short attr; /* Current attribute being scanned */ | |
3632 | unsigned short form; /* Form of the attribute */ | |
13b5a7ff | 3633 | int nbytes; /* Size of next field to read */ |
35f5886e FF |
3634 | |
3635 | diecount++; | |
3636 | diep = dip -> die; | |
13b5a7ff FF |
3637 | end = diep + dip -> die_length; |
3638 | diep += SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG; | |
35f5886e FF |
3639 | while (diep < end) |
3640 | { | |
13b5a7ff FF |
3641 | attr = target_to_host (diep, SIZEOF_ATTRIBUTE, GET_UNSIGNED, objfile); |
3642 | diep += SIZEOF_ATTRIBUTE; | |
3643 | if ((nbytes = attribute_size (attr)) == -1) | |
3644 | { | |
51b80b00 | 3645 | complain (&unknown_attribute_length, DIE_ID, DIE_NAME); |
13b5a7ff FF |
3646 | diep = end; |
3647 | continue; | |
3648 | } | |
35f5886e FF |
3649 | switch (attr) |
3650 | { | |
3651 | case AT_fund_type: | |
13b5a7ff FF |
3652 | dip -> at_fund_type = target_to_host (diep, nbytes, GET_UNSIGNED, |
3653 | objfile); | |
35f5886e FF |
3654 | break; |
3655 | case AT_ordering: | |
13b5a7ff FF |
3656 | dip -> at_ordering = target_to_host (diep, nbytes, GET_UNSIGNED, |
3657 | objfile); | |
35f5886e FF |
3658 | break; |
3659 | case AT_bit_offset: | |
13b5a7ff FF |
3660 | dip -> at_bit_offset = target_to_host (diep, nbytes, GET_UNSIGNED, |
3661 | objfile); | |
35f5886e | 3662 | break; |
35f5886e | 3663 | case AT_sibling: |
13b5a7ff FF |
3664 | dip -> at_sibling = target_to_host (diep, nbytes, GET_UNSIGNED, |
3665 | objfile); | |
35f5886e FF |
3666 | break; |
3667 | case AT_stmt_list: | |
13b5a7ff FF |
3668 | dip -> at_stmt_list = target_to_host (diep, nbytes, GET_UNSIGNED, |
3669 | objfile); | |
2d6186f4 | 3670 | dip -> has_at_stmt_list = 1; |
35f5886e FF |
3671 | break; |
3672 | case AT_low_pc: | |
13b5a7ff FF |
3673 | dip -> at_low_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3674 | objfile); | |
4d315a07 | 3675 | dip -> at_low_pc += baseaddr; |
2d6186f4 | 3676 | dip -> has_at_low_pc = 1; |
35f5886e FF |
3677 | break; |
3678 | case AT_high_pc: | |
13b5a7ff FF |
3679 | dip -> at_high_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3680 | objfile); | |
4d315a07 | 3681 | dip -> at_high_pc += baseaddr; |
35f5886e FF |
3682 | break; |
3683 | case AT_language: | |
13b5a7ff FF |
3684 | dip -> at_language = target_to_host (diep, nbytes, GET_UNSIGNED, |
3685 | objfile); | |
35f5886e FF |
3686 | break; |
3687 | case AT_user_def_type: | |
13b5a7ff FF |
3688 | dip -> at_user_def_type = target_to_host (diep, nbytes, |
3689 | GET_UNSIGNED, objfile); | |
35f5886e FF |
3690 | break; |
3691 | case AT_byte_size: | |
13b5a7ff FF |
3692 | dip -> at_byte_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3693 | objfile); | |
50055e94 | 3694 | dip -> has_at_byte_size = 1; |
35f5886e FF |
3695 | break; |
3696 | case AT_bit_size: | |
13b5a7ff FF |
3697 | dip -> at_bit_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3698 | objfile); | |
35f5886e FF |
3699 | break; |
3700 | case AT_member: | |
13b5a7ff FF |
3701 | dip -> at_member = target_to_host (diep, nbytes, GET_UNSIGNED, |
3702 | objfile); | |
35f5886e FF |
3703 | break; |
3704 | case AT_discr: | |
13b5a7ff FF |
3705 | dip -> at_discr = target_to_host (diep, nbytes, GET_UNSIGNED, |
3706 | objfile); | |
35f5886e | 3707 | break; |
35f5886e FF |
3708 | case AT_location: |
3709 | dip -> at_location = diep; | |
3710 | break; | |
3711 | case AT_mod_fund_type: | |
3712 | dip -> at_mod_fund_type = diep; | |
3713 | break; | |
3714 | case AT_subscr_data: | |
3715 | dip -> at_subscr_data = diep; | |
3716 | break; | |
3717 | case AT_mod_u_d_type: | |
3718 | dip -> at_mod_u_d_type = diep; | |
3719 | break; | |
35f5886e FF |
3720 | case AT_element_list: |
3721 | dip -> at_element_list = diep; | |
768be6e1 FF |
3722 | dip -> short_element_list = 0; |
3723 | break; | |
3724 | case AT_short_element_list: | |
3725 | dip -> at_element_list = diep; | |
3726 | dip -> short_element_list = 1; | |
35f5886e FF |
3727 | break; |
3728 | case AT_discr_value: | |
3729 | dip -> at_discr_value = diep; | |
3730 | break; | |
3731 | case AT_string_length: | |
3732 | dip -> at_string_length = diep; | |
3733 | break; | |
3734 | case AT_name: | |
3735 | dip -> at_name = diep; | |
3736 | break; | |
3737 | case AT_comp_dir: | |
d4902ab0 FF |
3738 | /* For now, ignore any "hostname:" portion, since gdb doesn't |
3739 | know how to deal with it. (FIXME). */ | |
3740 | dip -> at_comp_dir = strrchr (diep, ':'); | |
3741 | if (dip -> at_comp_dir != NULL) | |
3742 | { | |
3743 | dip -> at_comp_dir++; | |
3744 | } | |
3745 | else | |
3746 | { | |
3747 | dip -> at_comp_dir = diep; | |
3748 | } | |
35f5886e FF |
3749 | break; |
3750 | case AT_producer: | |
3751 | dip -> at_producer = diep; | |
3752 | break; | |
35f5886e | 3753 | case AT_start_scope: |
13b5a7ff FF |
3754 | dip -> at_start_scope = target_to_host (diep, nbytes, GET_UNSIGNED, |
3755 | objfile); | |
35f5886e FF |
3756 | break; |
3757 | case AT_stride_size: | |
13b5a7ff FF |
3758 | dip -> at_stride_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3759 | objfile); | |
35f5886e FF |
3760 | break; |
3761 | case AT_src_info: | |
13b5a7ff FF |
3762 | dip -> at_src_info = target_to_host (diep, nbytes, GET_UNSIGNED, |
3763 | objfile); | |
35f5886e FF |
3764 | break; |
3765 | case AT_prototyped: | |
13b5a7ff | 3766 | dip -> at_prototyped = diep; |
35f5886e | 3767 | break; |
35f5886e FF |
3768 | default: |
3769 | /* Found an attribute that we are unprepared to handle. However | |
3770 | it is specifically one of the design goals of DWARF that | |
3771 | consumers should ignore unknown attributes. As long as the | |
3772 | form is one that we recognize (so we know how to skip it), | |
3773 | we can just ignore the unknown attribute. */ | |
3774 | break; | |
3775 | } | |
13b5a7ff | 3776 | form = FORM_FROM_ATTR (attr); |
35f5886e FF |
3777 | switch (form) |
3778 | { | |
3779 | case FORM_DATA2: | |
13b5a7ff | 3780 | diep += 2; |
35f5886e FF |
3781 | break; |
3782 | case FORM_DATA4: | |
13b5a7ff FF |
3783 | case FORM_REF: |
3784 | diep += 4; | |
35f5886e FF |
3785 | break; |
3786 | case FORM_DATA8: | |
13b5a7ff | 3787 | diep += 8; |
35f5886e FF |
3788 | break; |
3789 | case FORM_ADDR: | |
13b5a7ff | 3790 | diep += TARGET_FT_POINTER_SIZE (objfile); |
35f5886e FF |
3791 | break; |
3792 | case FORM_BLOCK2: | |
13b5a7ff | 3793 | diep += 2 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); |
35f5886e FF |
3794 | break; |
3795 | case FORM_BLOCK4: | |
13b5a7ff | 3796 | diep += 4 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); |
35f5886e FF |
3797 | break; |
3798 | case FORM_STRING: | |
3799 | diep += strlen (diep) + 1; | |
3800 | break; | |
3801 | default: | |
51b80b00 | 3802 | complain (&unknown_attribute_form, DIE_ID, DIE_NAME, form); |
35f5886e FF |
3803 | diep = end; |
3804 | break; | |
3805 | } | |
3806 | } | |
3807 | } | |
95967e73 | 3808 | |
13b5a7ff | 3809 | /* |
95967e73 | 3810 | |
13b5a7ff FF |
3811 | LOCAL FUNCTION |
3812 | ||
3813 | target_to_host -- swap in target data to host | |
3814 | ||
3815 | SYNOPSIS | |
3816 | ||
3817 | target_to_host (char *from, int nbytes, int signextend, | |
3818 | struct objfile *objfile) | |
3819 | ||
3820 | DESCRIPTION | |
3821 | ||
3822 | Given pointer to data in target format in FROM, a byte count for | |
3823 | the size of the data in NBYTES, a flag indicating whether or not | |
3824 | the data is signed in SIGNEXTEND, and a pointer to the current | |
3825 | objfile in OBJFILE, convert the data to host format and return | |
3826 | the converted value. | |
3827 | ||
3828 | NOTES | |
3829 | ||
3830 | FIXME: If we read data that is known to be signed, and expect to | |
3831 | use it as signed data, then we need to explicitly sign extend the | |
3832 | result until the bfd library is able to do this for us. | |
3833 | ||
3834 | */ | |
3835 | ||
3836 | static unsigned long | |
3837 | target_to_host (from, nbytes, signextend, objfile) | |
95967e73 FF |
3838 | char *from; |
3839 | int nbytes; | |
13b5a7ff | 3840 | int signextend; /* FIXME: Unused */ |
95967e73 FF |
3841 | struct objfile *objfile; |
3842 | { | |
13b5a7ff | 3843 | unsigned long rtnval; |
95967e73 FF |
3844 | |
3845 | switch (nbytes) | |
3846 | { | |
95967e73 | 3847 | case 8: |
13b5a7ff | 3848 | rtnval = bfd_get_64 (objfile -> obfd, (bfd_byte *) from); |
95967e73 | 3849 | break; |
95967e73 | 3850 | case 4: |
13b5a7ff | 3851 | rtnval = bfd_get_32 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3852 | break; |
3853 | case 2: | |
13b5a7ff | 3854 | rtnval = bfd_get_16 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3855 | break; |
3856 | case 1: | |
13b5a7ff | 3857 | rtnval = bfd_get_8 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3858 | break; |
3859 | default: | |
51b80b00 | 3860 | complain (&no_bfd_get_N, DIE_ID, DIE_NAME, nbytes); |
13b5a7ff | 3861 | rtnval = 0; |
95967e73 FF |
3862 | break; |
3863 | } | |
13b5a7ff | 3864 | return (rtnval); |
95967e73 FF |
3865 | } |
3866 | ||
13b5a7ff FF |
3867 | /* |
3868 | ||
3869 | LOCAL FUNCTION | |
3870 | ||
3871 | attribute_size -- compute size of data for a DWARF attribute | |
3872 | ||
3873 | SYNOPSIS | |
3874 | ||
3875 | static int attribute_size (unsigned int attr) | |
3876 | ||
3877 | DESCRIPTION | |
3878 | ||
3879 | Given a DWARF attribute in ATTR, compute the size of the first | |
3880 | piece of data associated with this attribute and return that | |
3881 | size. | |
3882 | ||
3883 | Returns -1 for unrecognized attributes. | |
3884 | ||
3885 | */ | |
3886 | ||
3887 | static int | |
3888 | attribute_size (attr) | |
3889 | unsigned int attr; | |
3890 | { | |
3891 | int nbytes; /* Size of next data for this attribute */ | |
3892 | unsigned short form; /* Form of the attribute */ | |
3893 | ||
3894 | form = FORM_FROM_ATTR (attr); | |
3895 | switch (form) | |
3896 | { | |
3897 | case FORM_STRING: /* A variable length field is next */ | |
3898 | nbytes = 0; | |
3899 | break; | |
3900 | case FORM_DATA2: /* Next 2 byte field is the data itself */ | |
3901 | case FORM_BLOCK2: /* Next 2 byte field is a block length */ | |
3902 | nbytes = 2; | |
3903 | break; | |
3904 | case FORM_DATA4: /* Next 4 byte field is the data itself */ | |
3905 | case FORM_BLOCK4: /* Next 4 byte field is a block length */ | |
3906 | case FORM_REF: /* Next 4 byte field is a DIE offset */ | |
3907 | nbytes = 4; | |
3908 | break; | |
3909 | case FORM_DATA8: /* Next 8 byte field is the data itself */ | |
3910 | nbytes = 8; | |
3911 | break; | |
3912 | case FORM_ADDR: /* Next field size is target sizeof(void *) */ | |
3913 | nbytes = TARGET_FT_POINTER_SIZE (objfile); | |
3914 | break; | |
3915 | default: | |
51b80b00 | 3916 | complain (&unknown_attribute_form, DIE_ID, DIE_NAME, form); |
13b5a7ff FF |
3917 | nbytes = -1; |
3918 | break; | |
3919 | } | |
3920 | return (nbytes); | |
3921 | } |