Commit | Line | Data |
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35f5886e | 1 | /* DWARF debugging format support for GDB. |
4386eff2 | 2 | Copyright (C) 1991, 1992, 1993, 1994 Free Software Foundation, Inc. |
1ab3bf1b | 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 | ||
9745ba07 JK |
24 | FIXME: Do we need to generate dependencies in partial symtabs? |
25 | (Perhaps we don't need to). | |
35f5886e | 26 | |
35f5886e FF |
27 | FIXME: Resolve minor differences between what information we put in the |
28 | partial symbol table and what dbxread puts in. For example, we don't yet | |
29 | put enum constants there. And dbxread seems to invent a lot of typedefs | |
30 | we never see. Use the new printpsym command to see the partial symbol table | |
31 | contents. | |
32 | ||
35f5886e FF |
33 | FIXME: Figure out a better way to tell gdb about the name of the function |
34 | contain the user's entry point (I.E. main()) | |
35 | ||
35f5886e FF |
36 | FIXME: See other FIXME's and "ifdef 0" scattered throughout the code for |
37 | other things to work on, if you get bored. :-) | |
38 | ||
39 | */ | |
4d315a07 | 40 | |
d747e0af | 41 | #include "defs.h" |
35f5886e FF |
42 | #include "bfd.h" |
43 | #include "symtab.h" | |
1ab3bf1b | 44 | #include "gdbtypes.h" |
35f5886e | 45 | #include "symfile.h" |
5e2e79f8 | 46 | #include "objfiles.h" |
791e4513 | 47 | #include <time.h> /* For time_t in libbfd.h. */ |
ddf5d7e8 | 48 | #include <sys/types.h> /* For time_t, if not in time.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> | |
51b80b00 | 59 | |
d5931d79 JG |
60 | #ifndef NO_SYS_FILE |
61 | #include <sys/file.h> | |
62 | #endif | |
63 | ||
64 | /* FIXME -- convert this to SEEK_SET a la POSIX, move to config files. */ | |
65 | #ifndef L_SET | |
66 | #define L_SET 0 | |
67 | #endif | |
68 | ||
51b80b00 FF |
69 | /* Some macros to provide DIE info for complaints. */ |
70 | ||
71 | #define DIE_ID (curdie!=NULL ? curdie->die_ref : 0) | |
72 | #define DIE_NAME (curdie!=NULL && curdie->at_name!=NULL) ? curdie->at_name : "" | |
73 | ||
74 | /* Complaints that can be issued during DWARF debug info reading. */ | |
75 | ||
76 | struct complaint no_bfd_get_N = | |
77 | { | |
78 | "DIE @ 0x%x \"%s\", no bfd support for %d byte data object", 0, 0 | |
79 | }; | |
80 | ||
81 | struct complaint malformed_die = | |
82 | { | |
83 | "DIE @ 0x%x \"%s\", malformed DIE, bad length (%d bytes)", 0, 0 | |
84 | }; | |
85 | ||
86 | struct complaint bad_die_ref = | |
87 | { | |
88 | "DIE @ 0x%x \"%s\", reference to DIE (0x%x) outside compilation unit", 0, 0 | |
89 | }; | |
90 | ||
91 | struct complaint unknown_attribute_form = | |
92 | { | |
93 | "DIE @ 0x%x \"%s\", unknown attribute form (0x%x)", 0, 0 | |
94 | }; | |
95 | ||
96 | struct complaint unknown_attribute_length = | |
97 | { | |
98 | "DIE @ 0x%x \"%s\", unknown attribute length, skipped remaining attributes", 0, 0 | |
99 | }; | |
100 | ||
101 | struct complaint unexpected_fund_type = | |
102 | { | |
103 | "DIE @ 0x%x \"%s\", unexpected fundamental type 0x%x", 0, 0 | |
104 | }; | |
105 | ||
106 | struct complaint unknown_type_modifier = | |
107 | { | |
108 | "DIE @ 0x%x \"%s\", unknown type modifier %u", 0, 0 | |
109 | }; | |
110 | ||
111 | struct complaint volatile_ignored = | |
112 | { | |
113 | "DIE @ 0x%x \"%s\", type modifier 'volatile' ignored", 0, 0 | |
114 | }; | |
115 | ||
116 | struct complaint const_ignored = | |
117 | { | |
118 | "DIE @ 0x%x \"%s\", type modifier 'const' ignored", 0, 0 | |
119 | }; | |
120 | ||
121 | struct complaint botched_modified_type = | |
122 | { | |
123 | "DIE @ 0x%x \"%s\", botched modified type decoding (mtype 0x%x)", 0, 0 | |
124 | }; | |
125 | ||
126 | struct complaint op_deref2 = | |
127 | { | |
128 | "DIE @ 0x%x \"%s\", OP_DEREF2 address 0x%x not handled", 0, 0 | |
129 | }; | |
130 | ||
131 | struct complaint op_deref4 = | |
132 | { | |
133 | "DIE @ 0x%x \"%s\", OP_DEREF4 address 0x%x not handled", 0, 0 | |
134 | }; | |
135 | ||
136 | struct complaint basereg_not_handled = | |
137 | { | |
138 | "DIE @ 0x%x \"%s\", BASEREG %d not handled", 0, 0 | |
139 | }; | |
140 | ||
141 | struct complaint dup_user_type_allocation = | |
142 | { | |
143 | "DIE @ 0x%x \"%s\", internal error: duplicate user type allocation", 0, 0 | |
144 | }; | |
145 | ||
146 | struct complaint dup_user_type_definition = | |
147 | { | |
148 | "DIE @ 0x%x \"%s\", internal error: duplicate user type definition", 0, 0 | |
149 | }; | |
150 | ||
151 | struct complaint missing_tag = | |
152 | { | |
153 | "DIE @ 0x%x \"%s\", missing class, structure, or union tag", 0, 0 | |
154 | }; | |
155 | ||
156 | struct complaint bad_array_element_type = | |
157 | { | |
158 | "DIE @ 0x%x \"%s\", bad array element type attribute 0x%x", 0, 0 | |
159 | }; | |
160 | ||
161 | struct complaint subscript_data_items = | |
162 | { | |
163 | "DIE @ 0x%x \"%s\", can't decode subscript data items", 0, 0 | |
164 | }; | |
165 | ||
166 | struct complaint unhandled_array_subscript_format = | |
167 | { | |
168 | "DIE @ 0x%x \"%s\", array subscript format 0x%x not handled yet", 0, 0 | |
169 | }; | |
170 | ||
171 | struct complaint unknown_array_subscript_format = | |
172 | { | |
173 | "DIE @ 0x%x \"%s\", unknown array subscript format %x", 0, 0 | |
174 | }; | |
175 | ||
176 | struct complaint not_row_major = | |
177 | { | |
178 | "DIE @ 0x%x \"%s\", array not row major; not handled correctly", 0, 0 | |
179 | }; | |
35f5886e | 180 | |
13b5a7ff | 181 | typedef unsigned int DIE_REF; /* Reference to a DIE */ |
35f5886e | 182 | |
4d315a07 FF |
183 | #ifndef GCC_PRODUCER |
184 | #define GCC_PRODUCER "GNU C " | |
185 | #endif | |
35f5886e | 186 | |
2dbde378 FF |
187 | #ifndef GPLUS_PRODUCER |
188 | #define GPLUS_PRODUCER "GNU C++ " | |
189 | #endif | |
190 | ||
191 | #ifndef LCC_PRODUCER | |
3dc755fb | 192 | #define LCC_PRODUCER "NCR C/C++" |
2dbde378 FF |
193 | #endif |
194 | ||
93bb6e65 FF |
195 | #ifndef CHILL_PRODUCER |
196 | #define CHILL_PRODUCER "GNU Chill " | |
197 | #endif | |
93bb6e65 | 198 | |
13b5a7ff FF |
199 | /* Flags to target_to_host() that tell whether or not the data object is |
200 | expected to be signed. Used, for example, when fetching a signed | |
201 | integer in the target environment which is used as a signed integer | |
202 | in the host environment, and the two environments have different sized | |
203 | ints. In this case, *somebody* has to sign extend the smaller sized | |
204 | int. */ | |
205 | ||
206 | #define GET_UNSIGNED 0 /* No sign extension required */ | |
207 | #define GET_SIGNED 1 /* Sign extension required */ | |
208 | ||
209 | /* Defines for things which are specified in the document "DWARF Debugging | |
210 | Information Format" published by UNIX International, Programming Languages | |
211 | SIG. These defines are based on revision 1.0.0, Jan 20, 1992. */ | |
212 | ||
213 | #define SIZEOF_DIE_LENGTH 4 | |
214 | #define SIZEOF_DIE_TAG 2 | |
215 | #define SIZEOF_ATTRIBUTE 2 | |
216 | #define SIZEOF_FORMAT_SPECIFIER 1 | |
217 | #define SIZEOF_FMT_FT 2 | |
218 | #define SIZEOF_LINETBL_LENGTH 4 | |
219 | #define SIZEOF_LINETBL_LINENO 4 | |
220 | #define SIZEOF_LINETBL_STMT 2 | |
221 | #define SIZEOF_LINETBL_DELTA 4 | |
222 | #define SIZEOF_LOC_ATOM_CODE 1 | |
223 | ||
224 | #define FORM_FROM_ATTR(attr) ((attr) & 0xF) /* Implicitly specified */ | |
225 | ||
226 | /* Macros that return the sizes of various types of data in the target | |
227 | environment. | |
228 | ||
2d6d969c FF |
229 | FIXME: Currently these are just compile time constants (as they are in |
230 | other parts of gdb as well). They need to be able to get the right size | |
231 | either from the bfd or possibly from the DWARF info. It would be nice if | |
232 | the DWARF producer inserted DIES that describe the fundamental types in | |
233 | the target environment into the DWARF info, similar to the way dbx stabs | |
234 | producers produce information about their fundamental types. */ | |
235 | ||
236 | #define TARGET_FT_POINTER_SIZE(objfile) (TARGET_PTR_BIT / TARGET_CHAR_BIT) | |
237 | #define TARGET_FT_LONG_SIZE(objfile) (TARGET_LONG_BIT / TARGET_CHAR_BIT) | |
95967e73 | 238 | |
768be6e1 FF |
239 | /* The Amiga SVR4 header file <dwarf.h> defines AT_element_list as a |
240 | FORM_BLOCK2, and this is the value emitted by the AT&T compiler. | |
241 | However, the Issue 2 DWARF specification from AT&T defines it as | |
242 | a FORM_BLOCK4, as does the latest specification from UI/PLSIG. | |
243 | For backwards compatibility with the AT&T compiler produced executables | |
244 | we define AT_short_element_list for this variant. */ | |
245 | ||
246 | #define AT_short_element_list (0x00f0|FORM_BLOCK2) | |
247 | ||
248 | /* External variables referenced. */ | |
249 | ||
35f5886e | 250 | extern int info_verbose; /* From main.c; nonzero => verbose */ |
318bf84f | 251 | extern char *warning_pre_print; /* From utils.c */ |
35f5886e FF |
252 | |
253 | /* The DWARF debugging information consists of two major pieces, | |
254 | one is a block of DWARF Information Entries (DIE's) and the other | |
255 | is a line number table. The "struct dieinfo" structure contains | |
256 | the information for a single DIE, the one currently being processed. | |
257 | ||
258 | In order to make it easier to randomly access the attribute fields | |
13b5a7ff | 259 | of the current DIE, which are specifically unordered within the DIE, |
35f5886e FF |
260 | each DIE is scanned and an instance of the "struct dieinfo" |
261 | structure is initialized. | |
262 | ||
263 | Initialization is done in two levels. The first, done by basicdieinfo(), | |
264 | just initializes those fields that are vital to deciding whether or not | |
265 | to use this DIE, how to skip past it, etc. The second, done by the | |
266 | function completedieinfo(), fills in the rest of the information. | |
267 | ||
268 | Attributes which have block forms are not interpreted at the time | |
269 | the DIE is scanned, instead we just save pointers to the start | |
270 | of their value fields. | |
271 | ||
272 | Some fields have a flag <name>_p that is set when the value of the | |
273 | field is valid (I.E. we found a matching attribute in the DIE). Since | |
274 | we may want to test for the presence of some attributes in the DIE, | |
2d6186f4 | 275 | such as AT_low_pc, without restricting the values of the field, |
35f5886e FF |
276 | we need someway to note that we found such an attribute. |
277 | ||
278 | */ | |
279 | ||
280 | typedef char BLOCK; | |
281 | ||
282 | struct dieinfo { | |
13b5a7ff FF |
283 | char * die; /* Pointer to the raw DIE data */ |
284 | unsigned long die_length; /* Length of the raw DIE data */ | |
285 | DIE_REF die_ref; /* Offset of this DIE */ | |
286 | unsigned short die_tag; /* Tag for this DIE */ | |
287 | unsigned long at_padding; | |
288 | unsigned long at_sibling; | |
289 | BLOCK * at_location; | |
290 | char * at_name; | |
291 | unsigned short at_fund_type; | |
292 | BLOCK * at_mod_fund_type; | |
293 | unsigned long at_user_def_type; | |
294 | BLOCK * at_mod_u_d_type; | |
295 | unsigned short at_ordering; | |
296 | BLOCK * at_subscr_data; | |
297 | unsigned long at_byte_size; | |
298 | unsigned short at_bit_offset; | |
299 | unsigned long at_bit_size; | |
300 | BLOCK * at_element_list; | |
301 | unsigned long at_stmt_list; | |
302 | unsigned long at_low_pc; | |
303 | unsigned long at_high_pc; | |
304 | unsigned long at_language; | |
305 | unsigned long at_member; | |
306 | unsigned long at_discr; | |
307 | BLOCK * at_discr_value; | |
13b5a7ff FF |
308 | BLOCK * at_string_length; |
309 | char * at_comp_dir; | |
310 | char * at_producer; | |
13b5a7ff FF |
311 | unsigned long at_start_scope; |
312 | unsigned long at_stride_size; | |
313 | unsigned long at_src_info; | |
314 | char * at_prototyped; | |
315 | unsigned int has_at_low_pc:1; | |
316 | unsigned int has_at_stmt_list:1; | |
50055e94 | 317 | unsigned int has_at_byte_size:1; |
13b5a7ff | 318 | unsigned int short_element_list:1; |
35f5886e FF |
319 | }; |
320 | ||
321 | static int diecount; /* Approximate count of dies for compilation unit */ | |
322 | static struct dieinfo *curdie; /* For warnings and such */ | |
323 | ||
324 | static char *dbbase; /* Base pointer to dwarf info */ | |
4090fe1c | 325 | static int dbsize; /* Size of dwarf info in bytes */ |
35f5886e FF |
326 | static int dbroff; /* Relative offset from start of .debug section */ |
327 | static char *lnbase; /* Base pointer to line section */ | |
328 | static int isreg; /* Kludge to identify register variables */ | |
a1c8d76e JK |
329 | /* Kludge to identify basereg references. Nonzero if we have an offset |
330 | relative to a basereg. */ | |
331 | static int offreg; | |
332 | /* Which base register is it relative to? */ | |
333 | static int basereg; | |
35f5886e | 334 | |
2670f34d | 335 | /* This value is added to each symbol value. FIXME: Generalize to |
3c02636b JK |
336 | the section_offsets structure used by dbxread (once this is done, |
337 | pass the appropriate section number to end_symtab). */ | |
35f5886e FF |
338 | static CORE_ADDR baseaddr; /* Add to each symbol value */ |
339 | ||
2670f34d JG |
340 | /* The section offsets used in the current psymtab or symtab. FIXME, |
341 | only used to pass one value (baseaddr) at the moment. */ | |
342 | static struct section_offsets *base_section_offsets; | |
343 | ||
35f5886e FF |
344 | /* Each partial symbol table entry contains a pointer to private data for the |
345 | read_symtab() function to use when expanding a partial symbol table entry | |
346 | to a full symbol table entry. For DWARF debugging info, this data is | |
347 | contained in the following structure and macros are provided for easy | |
348 | access to the members given a pointer to a partial symbol table entry. | |
349 | ||
350 | dbfoff Always the absolute file offset to the start of the ".debug" | |
351 | section for the file containing the DIE's being accessed. | |
352 | ||
353 | dbroff Relative offset from the start of the ".debug" access to the | |
354 | first DIE to be accessed. When building the partial symbol | |
355 | table, this value will be zero since we are accessing the | |
356 | entire ".debug" section. When expanding a partial symbol | |
357 | table entry, this value will be the offset to the first | |
358 | DIE for the compilation unit containing the symbol that | |
359 | triggers the expansion. | |
360 | ||
361 | dblength The size of the chunk of DIE's being examined, in bytes. | |
362 | ||
363 | lnfoff The absolute file offset to the line table fragment. Ignored | |
364 | when building partial symbol tables, but used when expanding | |
365 | them, and contains the absolute file offset to the fragment | |
366 | of the ".line" section containing the line numbers for the | |
367 | current compilation unit. | |
368 | */ | |
369 | ||
370 | struct dwfinfo { | |
d5931d79 | 371 | file_ptr dbfoff; /* Absolute file offset to start of .debug section */ |
35f5886e FF |
372 | int dbroff; /* Relative offset from start of .debug section */ |
373 | int dblength; /* Size of the chunk of DIE's being examined */ | |
d5931d79 | 374 | file_ptr lnfoff; /* Absolute file offset to line table fragment */ |
35f5886e FF |
375 | }; |
376 | ||
377 | #define DBFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbfoff) | |
378 | #define DBROFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbroff) | |
379 | #define DBLENGTH(p) (((struct dwfinfo *)((p)->read_symtab_private))->dblength) | |
380 | #define LNFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->lnfoff) | |
381 | ||
4d315a07 FF |
382 | /* The generic symbol table building routines have separate lists for |
383 | file scope symbols and all all other scopes (local scopes). So | |
384 | we need to select the right one to pass to add_symbol_to_list(). | |
385 | We do it by keeping a pointer to the correct list in list_in_scope. | |
35f5886e | 386 | |
4d315a07 FF |
387 | FIXME: The original dwarf code just treated the file scope as the first |
388 | local scope, and all other local scopes as nested local scopes, and worked | |
389 | fine. Check to see if we really need to distinguish these in buildsym.c */ | |
35f5886e | 390 | |
99140c31 | 391 | struct pending **list_in_scope = &file_symbols; |
35f5886e FF |
392 | |
393 | /* DIES which have user defined types or modified user defined types refer to | |
394 | other DIES for the type information. Thus we need to associate the offset | |
395 | of a DIE for a user defined type with a pointer to the type information. | |
396 | ||
397 | Originally this was done using a simple but expensive algorithm, with an | |
398 | array of unsorted structures, each containing an offset/type-pointer pair. | |
399 | This array was scanned linearly each time a lookup was done. The result | |
400 | was that gdb was spending over half it's startup time munging through this | |
401 | array of pointers looking for a structure that had the right offset member. | |
402 | ||
403 | The second attempt used the same array of structures, but the array was | |
404 | sorted using qsort each time a new offset/type was recorded, and a binary | |
405 | search was used to find the type pointer for a given DIE offset. This was | |
406 | even slower, due to the overhead of sorting the array each time a new | |
407 | offset/type pair was entered. | |
408 | ||
409 | The third attempt uses a fixed size array of type pointers, indexed by a | |
410 | value derived from the DIE offset. Since the minimum DIE size is 4 bytes, | |
411 | we can divide any DIE offset by 4 to obtain a unique index into this fixed | |
412 | size array. Since each element is a 4 byte pointer, it takes exactly as | |
413 | much memory to hold this array as to hold the DWARF info for a given | |
bf229b4e FF |
414 | compilation unit. But it gets freed as soon as we are done with it. |
415 | This has worked well in practice, as a reasonable tradeoff between memory | |
416 | consumption and speed, without having to resort to much more complicated | |
417 | algorithms. */ | |
35f5886e FF |
418 | |
419 | static struct type **utypes; /* Pointer to array of user type pointers */ | |
420 | static int numutypes; /* Max number of user type pointers */ | |
421 | ||
bf229b4e FF |
422 | /* Maintain an array of referenced fundamental types for the current |
423 | compilation unit being read. For DWARF version 1, we have to construct | |
424 | the fundamental types on the fly, since no information about the | |
425 | fundamental types is supplied. Each such fundamental type is created by | |
426 | calling a language dependent routine to create the type, and then a | |
427 | pointer to that type is then placed in the array at the index specified | |
428 | by it's FT_<TYPENAME> value. The array has a fixed size set by the | |
429 | FT_NUM_MEMBERS compile time constant, which is the number of predefined | |
430 | fundamental types gdb knows how to construct. */ | |
431 | ||
432 | static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */ | |
433 | ||
95ff889e FF |
434 | /* Record the language for the compilation unit which is currently being |
435 | processed. We know it once we have seen the TAG_compile_unit DIE, | |
436 | and we need it while processing the DIE's for that compilation unit. | |
437 | It is eventually saved in the symtab structure, but we don't finalize | |
438 | the symtab struct until we have processed all the DIE's for the | |
bf229b4e FF |
439 | compilation unit. We also need to get and save a pointer to the |
440 | language struct for this language, so we can call the language | |
441 | dependent routines for doing things such as creating fundamental | |
442 | types. */ | |
95ff889e FF |
443 | |
444 | static enum language cu_language; | |
bf229b4e | 445 | static const struct language_defn *cu_language_defn; |
95ff889e | 446 | |
35f5886e | 447 | /* Forward declarations of static functions so we don't have to worry |
1ab3bf1b JG |
448 | about ordering within this file. */ |
449 | ||
13b5a7ff FF |
450 | static int |
451 | attribute_size PARAMS ((unsigned int)); | |
452 | ||
453 | static unsigned long | |
454 | target_to_host PARAMS ((char *, int, int, struct objfile *)); | |
95967e73 | 455 | |
1ab3bf1b JG |
456 | static void |
457 | add_enum_psymbol PARAMS ((struct dieinfo *, struct objfile *)); | |
458 | ||
2dbde378 FF |
459 | static void |
460 | handle_producer PARAMS ((char *)); | |
461 | ||
1ab3bf1b JG |
462 | static void |
463 | read_file_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); | |
35f5886e | 464 | |
58050209 | 465 | static void |
1ab3bf1b | 466 | read_func_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
467 | |
468 | static void | |
1ab3bf1b JG |
469 | read_lexical_block_scope PARAMS ((struct dieinfo *, char *, char *, |
470 | struct objfile *)); | |
35f5886e | 471 | |
35f5886e | 472 | static void |
1ab3bf1b | 473 | scan_partial_symbols PARAMS ((char *, char *, struct objfile *)); |
35f5886e | 474 | |
35f5886e | 475 | static void |
d5931d79 JG |
476 | scan_compilation_units PARAMS ((char *, char *, file_ptr, |
477 | file_ptr, struct objfile *)); | |
35f5886e FF |
478 | |
479 | static void | |
1ab3bf1b | 480 | add_partial_symbol PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e FF |
481 | |
482 | static void | |
1ab3bf1b | 483 | init_psymbol_list PARAMS ((struct objfile *, int)); |
35f5886e FF |
484 | |
485 | static void | |
95967e73 | 486 | basicdieinfo PARAMS ((struct dieinfo *, char *, struct objfile *)); |
35f5886e FF |
487 | |
488 | static void | |
95967e73 | 489 | completedieinfo PARAMS ((struct dieinfo *, struct objfile *)); |
1ab3bf1b JG |
490 | |
491 | static void | |
492 | dwarf_psymtab_to_symtab PARAMS ((struct partial_symtab *)); | |
493 | ||
494 | static void | |
495 | psymtab_to_symtab_1 PARAMS ((struct partial_symtab *)); | |
35f5886e | 496 | |
c701c14c | 497 | static void |
1ab3bf1b | 498 | read_ofile_symtab PARAMS ((struct partial_symtab *)); |
35f5886e FF |
499 | |
500 | static void | |
1ab3bf1b | 501 | process_dies PARAMS ((char *, char *, struct objfile *)); |
35f5886e FF |
502 | |
503 | static void | |
1ab3bf1b JG |
504 | read_structure_scope PARAMS ((struct dieinfo *, char *, char *, |
505 | struct objfile *)); | |
35f5886e FF |
506 | |
507 | static struct type * | |
84ffdec2 | 508 | decode_array_element_type PARAMS ((char *)); |
35f5886e FF |
509 | |
510 | static struct type * | |
85f0a848 | 511 | decode_subscript_data_item PARAMS ((char *, char *)); |
35f5886e FF |
512 | |
513 | static void | |
1ab3bf1b | 514 | dwarf_read_array_type PARAMS ((struct dieinfo *)); |
35f5886e | 515 | |
9e4c1921 | 516 | static void |
1ab3bf1b | 517 | read_tag_pointer_type PARAMS ((struct dieinfo *dip)); |
9e4c1921 | 518 | |
ec16f701 FF |
519 | static void |
520 | read_tag_string_type PARAMS ((struct dieinfo *dip)); | |
521 | ||
35f5886e | 522 | static void |
1ab3bf1b | 523 | read_subroutine_type PARAMS ((struct dieinfo *, char *, char *)); |
35f5886e FF |
524 | |
525 | static void | |
1ab3bf1b | 526 | read_enumeration PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
527 | |
528 | static struct type * | |
1ab3bf1b | 529 | struct_type PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
530 | |
531 | static struct type * | |
1ab3bf1b | 532 | enum_type PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e | 533 | |
35f5886e | 534 | static void |
1ab3bf1b | 535 | decode_line_numbers PARAMS ((char *)); |
35f5886e FF |
536 | |
537 | static struct type * | |
1ab3bf1b | 538 | decode_die_type PARAMS ((struct dieinfo *)); |
35f5886e FF |
539 | |
540 | static struct type * | |
1ab3bf1b | 541 | decode_mod_fund_type PARAMS ((char *)); |
35f5886e FF |
542 | |
543 | static struct type * | |
1ab3bf1b | 544 | decode_mod_u_d_type PARAMS ((char *)); |
35f5886e FF |
545 | |
546 | static struct type * | |
1c92ca6f | 547 | decode_modified_type PARAMS ((char *, unsigned int, int)); |
35f5886e FF |
548 | |
549 | static struct type * | |
1ab3bf1b | 550 | decode_fund_type PARAMS ((unsigned int)); |
35f5886e FF |
551 | |
552 | static char * | |
1ab3bf1b | 553 | create_name PARAMS ((char *, struct obstack *)); |
35f5886e | 554 | |
35f5886e | 555 | static struct type * |
13b5a7ff | 556 | lookup_utype PARAMS ((DIE_REF)); |
35f5886e FF |
557 | |
558 | static struct type * | |
13b5a7ff | 559 | alloc_utype PARAMS ((DIE_REF, struct type *)); |
35f5886e FF |
560 | |
561 | static struct symbol * | |
1ab3bf1b | 562 | new_symbol PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e | 563 | |
95ff889e FF |
564 | static void |
565 | synthesize_typedef PARAMS ((struct dieinfo *, struct objfile *, | |
566 | struct type *)); | |
567 | ||
35f5886e | 568 | static int |
1ab3bf1b | 569 | locval PARAMS ((char *)); |
35f5886e | 570 | |
95ff889e FF |
571 | static void |
572 | set_cu_language PARAMS ((struct dieinfo *)); | |
573 | ||
bf229b4e FF |
574 | static struct type * |
575 | dwarf_fundamental_type PARAMS ((struct objfile *, int)); | |
576 | ||
577 | ||
578 | /* | |
579 | ||
580 | LOCAL FUNCTION | |
581 | ||
582 | dwarf_fundamental_type -- lookup or create a fundamental type | |
583 | ||
584 | SYNOPSIS | |
585 | ||
586 | struct type * | |
587 | dwarf_fundamental_type (struct objfile *objfile, int typeid) | |
588 | ||
589 | DESCRIPTION | |
590 | ||
591 | DWARF version 1 doesn't supply any fundamental type information, | |
592 | so gdb has to construct such types. It has a fixed number of | |
593 | fundamental types that it knows how to construct, which is the | |
594 | union of all types that it knows how to construct for all languages | |
595 | that it knows about. These are enumerated in gdbtypes.h. | |
596 | ||
597 | As an example, assume we find a DIE that references a DWARF | |
598 | fundamental type of FT_integer. We first look in the ftypes | |
599 | array to see if we already have such a type, indexed by the | |
600 | gdb internal value of FT_INTEGER. If so, we simply return a | |
601 | pointer to that type. If not, then we ask an appropriate | |
602 | language dependent routine to create a type FT_INTEGER, using | |
603 | defaults reasonable for the current target machine, and install | |
604 | that type in ftypes for future reference. | |
605 | ||
606 | RETURNS | |
607 | ||
608 | Pointer to a fundamental type. | |
609 | ||
610 | */ | |
611 | ||
612 | static struct type * | |
613 | dwarf_fundamental_type (objfile, typeid) | |
614 | struct objfile *objfile; | |
615 | int typeid; | |
616 | { | |
617 | if (typeid < 0 || typeid >= FT_NUM_MEMBERS) | |
618 | { | |
619 | error ("internal error - invalid fundamental type id %d", typeid); | |
620 | } | |
621 | ||
622 | /* Look for this particular type in the fundamental type vector. If one is | |
623 | not found, create and install one appropriate for the current language | |
624 | and the current target machine. */ | |
625 | ||
626 | if (ftypes[typeid] == NULL) | |
627 | { | |
628 | ftypes[typeid] = cu_language_defn -> la_fund_type(objfile, typeid); | |
629 | } | |
630 | ||
631 | return (ftypes[typeid]); | |
632 | } | |
633 | ||
95ff889e FF |
634 | /* |
635 | ||
636 | LOCAL FUNCTION | |
637 | ||
638 | set_cu_language -- set local copy of language for compilation unit | |
639 | ||
640 | SYNOPSIS | |
641 | ||
642 | void | |
643 | set_cu_language (struct dieinfo *dip) | |
644 | ||
645 | DESCRIPTION | |
646 | ||
647 | Decode the language attribute for a compilation unit DIE and | |
648 | remember what the language was. We use this at various times | |
649 | when processing DIE's for a given compilation unit. | |
650 | ||
651 | RETURNS | |
652 | ||
653 | No return value. | |
654 | ||
655 | */ | |
656 | ||
657 | static void | |
658 | set_cu_language (dip) | |
659 | struct dieinfo *dip; | |
660 | { | |
661 | switch (dip -> at_language) | |
662 | { | |
663 | case LANG_C89: | |
664 | case LANG_C: | |
665 | cu_language = language_c; | |
666 | break; | |
667 | case LANG_C_PLUS_PLUS: | |
668 | cu_language = language_cplus; | |
669 | break; | |
e58de8a2 FF |
670 | case LANG_CHILL: |
671 | cu_language = language_chill; | |
672 | break; | |
673 | case LANG_MODULA2: | |
674 | cu_language = language_m2; | |
675 | break; | |
95ff889e FF |
676 | case LANG_ADA83: |
677 | case LANG_COBOL74: | |
678 | case LANG_COBOL85: | |
679 | case LANG_FORTRAN77: | |
680 | case LANG_FORTRAN90: | |
681 | case LANG_PASCAL83: | |
2e4964ad | 682 | /* We don't know anything special about these yet. */ |
95ff889e FF |
683 | cu_language = language_unknown; |
684 | break; | |
2e4964ad FF |
685 | default: |
686 | /* If no at_language, try to deduce one from the filename */ | |
687 | cu_language = deduce_language_from_filename (dip -> at_name); | |
688 | break; | |
95ff889e | 689 | } |
bf229b4e | 690 | cu_language_defn = language_def (cu_language); |
95ff889e FF |
691 | } |
692 | ||
35f5886e FF |
693 | /* |
694 | ||
695 | GLOBAL FUNCTION | |
696 | ||
697 | dwarf_build_psymtabs -- build partial symtabs from DWARF debug info | |
698 | ||
699 | SYNOPSIS | |
700 | ||
d5931d79 | 701 | void dwarf_build_psymtabs (struct objfile *objfile, |
2670f34d | 702 | struct section_offsets *section_offsets, |
d5931d79 JG |
703 | int mainline, file_ptr dbfoff, unsigned int dbfsize, |
704 | file_ptr lnoffset, unsigned int lnsize) | |
35f5886e FF |
705 | |
706 | DESCRIPTION | |
707 | ||
708 | This function is called upon to build partial symtabs from files | |
709 | containing DIE's (Dwarf Information Entries) and DWARF line numbers. | |
710 | ||
d5931d79 | 711 | It is passed a bfd* containing the DIES |
35f5886e FF |
712 | and line number information, the corresponding filename for that |
713 | file, a base address for relocating the symbols, a flag indicating | |
714 | whether or not this debugging information is from a "main symbol | |
715 | table" rather than a shared library or dynamically linked file, | |
716 | and file offset/size pairs for the DIE information and line number | |
717 | information. | |
718 | ||
719 | RETURNS | |
720 | ||
721 | No return value. | |
722 | ||
723 | */ | |
724 | ||
725 | void | |
d5931d79 JG |
726 | dwarf_build_psymtabs (objfile, section_offsets, mainline, dbfoff, dbfsize, |
727 | lnoffset, lnsize) | |
728 | struct objfile *objfile; | |
2670f34d | 729 | struct section_offsets *section_offsets; |
1ab3bf1b | 730 | int mainline; |
d5931d79 | 731 | file_ptr dbfoff; |
4090fe1c | 732 | unsigned int dbfsize; |
d5931d79 | 733 | file_ptr lnoffset; |
1ab3bf1b | 734 | unsigned int lnsize; |
35f5886e | 735 | { |
d5931d79 | 736 | bfd *abfd = objfile->obfd; |
35f5886e FF |
737 | struct cleanup *back_to; |
738 | ||
95967e73 | 739 | current_objfile = objfile; |
4090fe1c | 740 | dbsize = dbfsize; |
35f5886e FF |
741 | dbbase = xmalloc (dbsize); |
742 | dbroff = 0; | |
d5931d79 JG |
743 | if ((bfd_seek (abfd, dbfoff, L_SET) != 0) || |
744 | (bfd_read (dbbase, dbsize, 1, abfd) != dbsize)) | |
35f5886e FF |
745 | { |
746 | free (dbbase); | |
d5931d79 | 747 | error ("can't read DWARF data from '%s'", bfd_get_filename (abfd)); |
35f5886e FF |
748 | } |
749 | back_to = make_cleanup (free, dbbase); | |
750 | ||
751 | /* If we are reinitializing, or if we have never loaded syms yet, init. | |
752 | Since we have no idea how many DIES we are looking at, we just guess | |
753 | some arbitrary value. */ | |
754 | ||
13b5a7ff FF |
755 | if (mainline || objfile -> global_psymbols.size == 0 || |
756 | objfile -> static_psymbols.size == 0) | |
35f5886e | 757 | { |
1ab3bf1b | 758 | init_psymbol_list (objfile, 1024); |
35f5886e FF |
759 | } |
760 | ||
84ffdec2 | 761 | /* Save the relocation factor where everybody can see it. */ |
f8b76e70 | 762 | |
2670f34d JG |
763 | base_section_offsets = section_offsets; |
764 | baseaddr = ANOFFSET (section_offsets, 0); | |
f8b76e70 | 765 | |
35f5886e FF |
766 | /* Follow the compilation unit sibling chain, building a partial symbol |
767 | table entry for each one. Save enough information about each compilation | |
768 | unit to locate the full DWARF information later. */ | |
769 | ||
d5931d79 | 770 | scan_compilation_units (dbbase, dbbase + dbsize, dbfoff, lnoffset, objfile); |
35f5886e | 771 | |
35f5886e | 772 | do_cleanups (back_to); |
95967e73 | 773 | current_objfile = NULL; |
35f5886e FF |
774 | } |
775 | ||
35f5886e FF |
776 | /* |
777 | ||
35f5886e FF |
778 | LOCAL FUNCTION |
779 | ||
780 | read_lexical_block_scope -- process all dies in a lexical block | |
781 | ||
782 | SYNOPSIS | |
783 | ||
784 | static void read_lexical_block_scope (struct dieinfo *dip, | |
785 | char *thisdie, char *enddie) | |
786 | ||
787 | DESCRIPTION | |
788 | ||
789 | Process all the DIES contained within a lexical block scope. | |
790 | Start a new scope, process the dies, and then close the scope. | |
791 | ||
792 | */ | |
793 | ||
794 | static void | |
1ab3bf1b JG |
795 | read_lexical_block_scope (dip, thisdie, enddie, objfile) |
796 | struct dieinfo *dip; | |
797 | char *thisdie; | |
798 | char *enddie; | |
799 | struct objfile *objfile; | |
35f5886e | 800 | { |
4d315a07 FF |
801 | register struct context_stack *new; |
802 | ||
4ed3a9ea | 803 | push_context (0, dip -> at_low_pc); |
13b5a7ff | 804 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 FF |
805 | new = pop_context (); |
806 | if (local_symbols != NULL) | |
807 | { | |
808 | finish_block (0, &local_symbols, new -> old_blocks, new -> start_addr, | |
1ab3bf1b | 809 | dip -> at_high_pc, objfile); |
4d315a07 FF |
810 | } |
811 | local_symbols = new -> locals; | |
35f5886e FF |
812 | } |
813 | ||
814 | /* | |
815 | ||
816 | LOCAL FUNCTION | |
817 | ||
818 | lookup_utype -- look up a user defined type from die reference | |
819 | ||
820 | SYNOPSIS | |
821 | ||
13b5a7ff | 822 | static type *lookup_utype (DIE_REF die_ref) |
35f5886e FF |
823 | |
824 | DESCRIPTION | |
825 | ||
826 | Given a DIE reference, lookup the user defined type associated with | |
827 | that DIE, if it has been registered already. If not registered, then | |
828 | return NULL. Alloc_utype() can be called to register an empty | |
829 | type for this reference, which will be filled in later when the | |
830 | actual referenced DIE is processed. | |
831 | */ | |
832 | ||
833 | static struct type * | |
13b5a7ff FF |
834 | lookup_utype (die_ref) |
835 | DIE_REF die_ref; | |
35f5886e FF |
836 | { |
837 | struct type *type = NULL; | |
838 | int utypeidx; | |
839 | ||
13b5a7ff | 840 | utypeidx = (die_ref - dbroff) / 4; |
35f5886e FF |
841 | if ((utypeidx < 0) || (utypeidx >= numutypes)) |
842 | { | |
51b80b00 | 843 | complain (&bad_die_ref, DIE_ID, DIE_NAME); |
35f5886e FF |
844 | } |
845 | else | |
846 | { | |
847 | type = *(utypes + utypeidx); | |
848 | } | |
849 | return (type); | |
850 | } | |
851 | ||
852 | ||
853 | /* | |
854 | ||
855 | LOCAL FUNCTION | |
856 | ||
857 | alloc_utype -- add a user defined type for die reference | |
858 | ||
859 | SYNOPSIS | |
860 | ||
13b5a7ff | 861 | static type *alloc_utype (DIE_REF die_ref, struct type *utypep) |
35f5886e FF |
862 | |
863 | DESCRIPTION | |
864 | ||
13b5a7ff | 865 | Given a die reference DIE_REF, and a possible pointer to a user |
35f5886e FF |
866 | defined type UTYPEP, register that this reference has a user |
867 | defined type and either use the specified type in UTYPEP or | |
868 | make a new empty type that will be filled in later. | |
869 | ||
870 | We should only be called after calling lookup_utype() to verify that | |
13b5a7ff | 871 | there is not currently a type registered for DIE_REF. |
35f5886e FF |
872 | */ |
873 | ||
874 | static struct type * | |
13b5a7ff FF |
875 | alloc_utype (die_ref, utypep) |
876 | DIE_REF die_ref; | |
1ab3bf1b | 877 | struct type *utypep; |
35f5886e FF |
878 | { |
879 | struct type **typep; | |
880 | int utypeidx; | |
881 | ||
13b5a7ff | 882 | utypeidx = (die_ref - dbroff) / 4; |
35f5886e FF |
883 | typep = utypes + utypeidx; |
884 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
885 | { | |
bf229b4e | 886 | utypep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
51b80b00 | 887 | complain (&bad_die_ref, DIE_ID, DIE_NAME); |
35f5886e FF |
888 | } |
889 | else if (*typep != NULL) | |
890 | { | |
891 | utypep = *typep; | |
51b80b00 | 892 | complain (&dup_user_type_allocation, DIE_ID, DIE_NAME); |
35f5886e FF |
893 | } |
894 | else | |
895 | { | |
896 | if (utypep == NULL) | |
897 | { | |
8050a57b | 898 | utypep = alloc_type (current_objfile); |
35f5886e FF |
899 | } |
900 | *typep = utypep; | |
901 | } | |
902 | return (utypep); | |
903 | } | |
904 | ||
905 | /* | |
906 | ||
907 | LOCAL FUNCTION | |
908 | ||
909 | decode_die_type -- return a type for a specified die | |
910 | ||
911 | SYNOPSIS | |
912 | ||
913 | static struct type *decode_die_type (struct dieinfo *dip) | |
914 | ||
915 | DESCRIPTION | |
916 | ||
917 | Given a pointer to a die information structure DIP, decode the | |
918 | type of the die and return a pointer to the decoded type. All | |
919 | dies without specific types default to type int. | |
920 | */ | |
921 | ||
922 | static struct type * | |
1ab3bf1b JG |
923 | decode_die_type (dip) |
924 | struct dieinfo *dip; | |
35f5886e FF |
925 | { |
926 | struct type *type = NULL; | |
927 | ||
928 | if (dip -> at_fund_type != 0) | |
929 | { | |
930 | type = decode_fund_type (dip -> at_fund_type); | |
931 | } | |
932 | else if (dip -> at_mod_fund_type != NULL) | |
933 | { | |
934 | type = decode_mod_fund_type (dip -> at_mod_fund_type); | |
935 | } | |
936 | else if (dip -> at_user_def_type) | |
937 | { | |
938 | if ((type = lookup_utype (dip -> at_user_def_type)) == NULL) | |
939 | { | |
940 | type = alloc_utype (dip -> at_user_def_type, NULL); | |
941 | } | |
942 | } | |
943 | else if (dip -> at_mod_u_d_type) | |
944 | { | |
945 | type = decode_mod_u_d_type (dip -> at_mod_u_d_type); | |
946 | } | |
947 | else | |
948 | { | |
bf229b4e | 949 | type = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
35f5886e FF |
950 | } |
951 | return (type); | |
952 | } | |
953 | ||
954 | /* | |
955 | ||
956 | LOCAL FUNCTION | |
957 | ||
958 | struct_type -- compute and return the type for a struct or union | |
959 | ||
960 | SYNOPSIS | |
961 | ||
962 | static struct type *struct_type (struct dieinfo *dip, char *thisdie, | |
8b5b6fae | 963 | char *enddie, struct objfile *objfile) |
35f5886e FF |
964 | |
965 | DESCRIPTION | |
966 | ||
967 | Given pointer to a die information structure for a die which | |
715cafcb FF |
968 | defines a union or structure (and MUST define one or the other), |
969 | and pointers to the raw die data that define the range of dies which | |
970 | define the members, compute and return the user defined type for the | |
971 | structure or union. | |
35f5886e FF |
972 | */ |
973 | ||
974 | static struct type * | |
1ab3bf1b JG |
975 | struct_type (dip, thisdie, enddie, objfile) |
976 | struct dieinfo *dip; | |
977 | char *thisdie; | |
978 | char *enddie; | |
979 | struct objfile *objfile; | |
35f5886e FF |
980 | { |
981 | struct type *type; | |
982 | struct nextfield { | |
983 | struct nextfield *next; | |
984 | struct field field; | |
985 | }; | |
986 | struct nextfield *list = NULL; | |
987 | struct nextfield *new; | |
988 | int nfields = 0; | |
989 | int n; | |
35f5886e | 990 | struct dieinfo mbr; |
8b5b6fae | 991 | char *nextdie; |
a8a69e63 | 992 | #if !BITS_BIG_ENDIAN |
50055e94 | 993 | int anonymous_size; |
a8a69e63 | 994 | #endif |
35f5886e | 995 | |
13b5a7ff | 996 | if ((type = lookup_utype (dip -> die_ref)) == NULL) |
35f5886e | 997 | { |
5edf98d7 | 998 | /* No forward references created an empty type, so install one now */ |
13b5a7ff | 999 | type = alloc_utype (dip -> die_ref, NULL); |
35f5886e | 1000 | } |
a3723a43 | 1001 | INIT_CPLUS_SPECIFIC(type); |
13b5a7ff | 1002 | switch (dip -> die_tag) |
35f5886e | 1003 | { |
95ff889e FF |
1004 | case TAG_class_type: |
1005 | TYPE_CODE (type) = TYPE_CODE_CLASS; | |
95ff889e | 1006 | break; |
715cafcb | 1007 | case TAG_structure_type: |
5edf98d7 | 1008 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
715cafcb FF |
1009 | break; |
1010 | case TAG_union_type: | |
1011 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
715cafcb FF |
1012 | break; |
1013 | default: | |
1014 | /* Should never happen */ | |
1015 | TYPE_CODE (type) = TYPE_CODE_UNDEF; | |
51b80b00 | 1016 | complain (&missing_tag, DIE_ID, DIE_NAME); |
715cafcb | 1017 | break; |
35f5886e | 1018 | } |
5edf98d7 FF |
1019 | /* Some compilers try to be helpful by inventing "fake" names for |
1020 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1021 | Thanks, but no thanks... */ | |
715cafcb FF |
1022 | if (dip -> at_name != NULL |
1023 | && *dip -> at_name != '~' | |
1024 | && *dip -> at_name != '.') | |
35f5886e | 1025 | { |
b2bebdb0 JK |
1026 | TYPE_TAG_NAME (type) = obconcat (&objfile -> type_obstack, |
1027 | "", "", dip -> at_name); | |
35f5886e | 1028 | } |
50055e94 FF |
1029 | /* Use whatever size is known. Zero is a valid size. We might however |
1030 | wish to check has_at_byte_size to make sure that some byte size was | |
1031 | given explicitly, but DWARF doesn't specify that explicit sizes of | |
1032 | zero have to present, so complaining about missing sizes should | |
1033 | probably not be the default. */ | |
1034 | TYPE_LENGTH (type) = dip -> at_byte_size; | |
13b5a7ff | 1035 | thisdie += dip -> die_length; |
35f5886e FF |
1036 | while (thisdie < enddie) |
1037 | { | |
95967e73 FF |
1038 | basicdieinfo (&mbr, thisdie, objfile); |
1039 | completedieinfo (&mbr, objfile); | |
13b5a7ff | 1040 | if (mbr.die_length <= SIZEOF_DIE_LENGTH) |
35f5886e FF |
1041 | { |
1042 | break; | |
1043 | } | |
8b5b6fae FF |
1044 | else if (mbr.at_sibling != 0) |
1045 | { | |
1046 | nextdie = dbbase + mbr.at_sibling - dbroff; | |
1047 | } | |
1048 | else | |
1049 | { | |
13b5a7ff | 1050 | nextdie = thisdie + mbr.die_length; |
8b5b6fae | 1051 | } |
13b5a7ff | 1052 | switch (mbr.die_tag) |
35f5886e FF |
1053 | { |
1054 | case TAG_member: | |
1055 | /* Get space to record the next field's data. */ | |
1056 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1057 | new -> next = list; | |
1058 | list = new; | |
1059 | /* Save the data. */ | |
50e0dc41 FF |
1060 | list -> field.name = |
1061 | obsavestring (mbr.at_name, strlen (mbr.at_name), | |
1062 | &objfile -> type_obstack); | |
35f5886e FF |
1063 | list -> field.type = decode_die_type (&mbr); |
1064 | list -> field.bitpos = 8 * locval (mbr.at_location); | |
4db8e515 FF |
1065 | /* Handle bit fields. */ |
1066 | list -> field.bitsize = mbr.at_bit_size; | |
1067 | #if BITS_BIG_ENDIAN | |
1068 | /* For big endian bits, the at_bit_offset gives the additional | |
1069 | bit offset from the MSB of the containing anonymous object to | |
1070 | the MSB of the field. We don't have to do anything special | |
1071 | since we don't need to know the size of the anonymous object. */ | |
1072 | list -> field.bitpos += mbr.at_bit_offset; | |
1073 | #else | |
1074 | /* For little endian bits, we need to have a non-zero at_bit_size, | |
1075 | so that we know we are in fact dealing with a bitfield. Compute | |
1076 | the bit offset to the MSB of the anonymous object, subtract off | |
1077 | the number of bits from the MSB of the field to the MSB of the | |
1078 | object, and then subtract off the number of bits of the field | |
1079 | itself. The result is the bit offset of the LSB of the field. */ | |
1080 | if (mbr.at_bit_size > 0) | |
1081 | { | |
50055e94 FF |
1082 | if (mbr.has_at_byte_size) |
1083 | { | |
1084 | /* The size of the anonymous object containing the bit field | |
1085 | is explicit, so use the indicated size (in bytes). */ | |
1086 | anonymous_size = mbr.at_byte_size; | |
1087 | } | |
1088 | else | |
1089 | { | |
1090 | /* The size of the anonymous object containing the bit field | |
1091 | matches the size of an object of the bit field's type. | |
1092 | DWARF allows at_byte_size to be left out in such cases, | |
1093 | as a debug information size optimization. */ | |
1094 | anonymous_size = TYPE_LENGTH (list -> field.type); | |
1095 | } | |
4db8e515 | 1096 | list -> field.bitpos += |
50055e94 | 1097 | anonymous_size * 8 - mbr.at_bit_offset - mbr.at_bit_size; |
4db8e515 FF |
1098 | } |
1099 | #endif | |
35f5886e FF |
1100 | nfields++; |
1101 | break; | |
1102 | default: | |
8b5b6fae | 1103 | process_dies (thisdie, nextdie, objfile); |
35f5886e FF |
1104 | break; |
1105 | } | |
8b5b6fae | 1106 | thisdie = nextdie; |
35f5886e | 1107 | } |
5edf98d7 FF |
1108 | /* Now create the vector of fields, and record how big it is. We may |
1109 | not even have any fields, if this DIE was generated due to a reference | |
1110 | to an anonymous structure or union. In this case, TYPE_FLAG_STUB is | |
1111 | set, which clues gdb in to the fact that it needs to search elsewhere | |
1112 | for the full structure definition. */ | |
1113 | if (nfields == 0) | |
35f5886e | 1114 | { |
5edf98d7 FF |
1115 | TYPE_FLAGS (type) |= TYPE_FLAG_STUB; |
1116 | } | |
1117 | else | |
1118 | { | |
1119 | TYPE_NFIELDS (type) = nfields; | |
1120 | TYPE_FIELDS (type) = (struct field *) | |
dac9734e | 1121 | TYPE_ALLOC (type, sizeof (struct field) * nfields); |
5edf98d7 FF |
1122 | /* Copy the saved-up fields into the field vector. */ |
1123 | for (n = nfields; list; list = list -> next) | |
1124 | { | |
1125 | TYPE_FIELD (type, --n) = list -> field; | |
1126 | } | |
1127 | } | |
35f5886e FF |
1128 | return (type); |
1129 | } | |
1130 | ||
1131 | /* | |
1132 | ||
1133 | LOCAL FUNCTION | |
1134 | ||
1135 | read_structure_scope -- process all dies within struct or union | |
1136 | ||
1137 | SYNOPSIS | |
1138 | ||
1139 | static void read_structure_scope (struct dieinfo *dip, | |
8b5b6fae | 1140 | char *thisdie, char *enddie, struct objfile *objfile) |
35f5886e FF |
1141 | |
1142 | DESCRIPTION | |
1143 | ||
1144 | Called when we find the DIE that starts a structure or union | |
1145 | scope (definition) to process all dies that define the members | |
1146 | of the structure or union. DIP is a pointer to the die info | |
1147 | struct for the DIE that names the structure or union. | |
1148 | ||
1149 | NOTES | |
1150 | ||
1151 | Note that we need to call struct_type regardless of whether or not | |
84ce6717 FF |
1152 | the DIE has an at_name attribute, since it might be an anonymous |
1153 | structure or union. This gets the type entered into our set of | |
1154 | user defined types. | |
1155 | ||
1156 | However, if the structure is incomplete (an opaque struct/union) | |
1157 | then suppress creating a symbol table entry for it since gdb only | |
1158 | wants to find the one with the complete definition. Note that if | |
1159 | it is complete, we just call new_symbol, which does it's own | |
1160 | checking about whether the struct/union is anonymous or not (and | |
1161 | suppresses creating a symbol table entry itself). | |
1162 | ||
35f5886e FF |
1163 | */ |
1164 | ||
1165 | static void | |
1ab3bf1b JG |
1166 | read_structure_scope (dip, thisdie, enddie, objfile) |
1167 | struct dieinfo *dip; | |
1168 | char *thisdie; | |
1169 | char *enddie; | |
1170 | struct objfile *objfile; | |
35f5886e FF |
1171 | { |
1172 | struct type *type; | |
1173 | struct symbol *sym; | |
1174 | ||
8b5b6fae | 1175 | type = struct_type (dip, thisdie, enddie, objfile); |
84ce6717 | 1176 | if (!(TYPE_FLAGS (type) & TYPE_FLAG_STUB)) |
35f5886e | 1177 | { |
95ff889e FF |
1178 | sym = new_symbol (dip, objfile); |
1179 | if (sym != NULL) | |
84ce6717 FF |
1180 | { |
1181 | SYMBOL_TYPE (sym) = type; | |
95ff889e FF |
1182 | if (cu_language == language_cplus) |
1183 | { | |
1184 | synthesize_typedef (dip, objfile, type); | |
1185 | } | |
84ce6717 | 1186 | } |
35f5886e FF |
1187 | } |
1188 | } | |
1189 | ||
1190 | /* | |
1191 | ||
1192 | LOCAL FUNCTION | |
1193 | ||
1194 | decode_array_element_type -- decode type of the array elements | |
1195 | ||
1196 | SYNOPSIS | |
1197 | ||
1198 | static struct type *decode_array_element_type (char *scan, char *end) | |
1199 | ||
1200 | DESCRIPTION | |
1201 | ||
1202 | As the last step in decoding the array subscript information for an | |
1203 | array DIE, we need to decode the type of the array elements. We are | |
1204 | passed a pointer to this last part of the subscript information and | |
1205 | must return the appropriate type. If the type attribute is not | |
1206 | recognized, just warn about the problem and return type int. | |
1207 | */ | |
1208 | ||
1209 | static struct type * | |
84ffdec2 | 1210 | decode_array_element_type (scan) |
1ab3bf1b | 1211 | char *scan; |
35f5886e FF |
1212 | { |
1213 | struct type *typep; | |
13b5a7ff FF |
1214 | DIE_REF die_ref; |
1215 | unsigned short attribute; | |
35f5886e | 1216 | unsigned short fundtype; |
13b5a7ff | 1217 | int nbytes; |
35f5886e | 1218 | |
13b5a7ff FF |
1219 | attribute = target_to_host (scan, SIZEOF_ATTRIBUTE, GET_UNSIGNED, |
1220 | current_objfile); | |
1221 | scan += SIZEOF_ATTRIBUTE; | |
1222 | if ((nbytes = attribute_size (attribute)) == -1) | |
1223 | { | |
51b80b00 | 1224 | complain (&bad_array_element_type, DIE_ID, DIE_NAME, attribute); |
bf229b4e | 1225 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff FF |
1226 | } |
1227 | else | |
1228 | { | |
1229 | switch (attribute) | |
1230 | { | |
1231 | case AT_fund_type: | |
1232 | fundtype = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1233 | current_objfile); | |
1234 | typep = decode_fund_type (fundtype); | |
1235 | break; | |
1236 | case AT_mod_fund_type: | |
1237 | typep = decode_mod_fund_type (scan); | |
1238 | break; | |
1239 | case AT_user_def_type: | |
1240 | die_ref = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1241 | current_objfile); | |
1242 | if ((typep = lookup_utype (die_ref)) == NULL) | |
1243 | { | |
1244 | typep = alloc_utype (die_ref, NULL); | |
1245 | } | |
1246 | break; | |
1247 | case AT_mod_u_d_type: | |
1248 | typep = decode_mod_u_d_type (scan); | |
1249 | break; | |
1250 | default: | |
51b80b00 | 1251 | complain (&bad_array_element_type, DIE_ID, DIE_NAME, attribute); |
bf229b4e | 1252 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff FF |
1253 | break; |
1254 | } | |
35f5886e FF |
1255 | } |
1256 | return (typep); | |
1257 | } | |
1258 | ||
1259 | /* | |
1260 | ||
1261 | LOCAL FUNCTION | |
1262 | ||
85f0a848 | 1263 | decode_subscript_data_item -- decode array subscript item |
35f5886e FF |
1264 | |
1265 | SYNOPSIS | |
1266 | ||
85f0a848 FF |
1267 | static struct type * |
1268 | decode_subscript_data_item (char *scan, char *end) | |
35f5886e FF |
1269 | |
1270 | DESCRIPTION | |
1271 | ||
1272 | The array subscripts and the data type of the elements of an | |
1273 | array are described by a list of data items, stored as a block | |
1274 | of contiguous bytes. There is a data item describing each array | |
1275 | dimension, and a final data item describing the element type. | |
1276 | The data items are ordered the same as their appearance in the | |
1277 | source (I.E. leftmost dimension first, next to leftmost second, | |
1278 | etc). | |
1279 | ||
85f0a848 FF |
1280 | The data items describing each array dimension consist of four |
1281 | parts: (1) a format specifier, (2) type type of the subscript | |
1282 | index, (3) a description of the low bound of the array dimension, | |
1283 | and (4) a description of the high bound of the array dimension. | |
1284 | ||
1285 | The last data item is the description of the type of each of | |
1286 | the array elements. | |
1287 | ||
35f5886e | 1288 | We are passed a pointer to the start of the block of bytes |
85f0a848 FF |
1289 | containing the remaining data items, and a pointer to the first |
1290 | byte past the data. This function recursively decodes the | |
1291 | remaining data items and returns a type. | |
1292 | ||
1293 | If we somehow fail to decode some data, we complain about it | |
1294 | and return a type "array of int". | |
35f5886e FF |
1295 | |
1296 | BUGS | |
1297 | FIXME: This code only implements the forms currently used | |
1298 | by the AT&T and GNU C compilers. | |
1299 | ||
1300 | The end pointer is supplied for error checking, maybe we should | |
1301 | use it for that... | |
1302 | */ | |
1303 | ||
1304 | static struct type * | |
85f0a848 | 1305 | decode_subscript_data_item (scan, end) |
1ab3bf1b JG |
1306 | char *scan; |
1307 | char *end; | |
35f5886e | 1308 | { |
85f0a848 FF |
1309 | struct type *typep = NULL; /* Array type we are building */ |
1310 | struct type *nexttype; /* Type of each element (may be array) */ | |
1311 | struct type *indextype; /* Type of this index */ | |
a8a69e63 | 1312 | struct type *rangetype; |
13b5a7ff FF |
1313 | unsigned int format; |
1314 | unsigned short fundtype; | |
1315 | unsigned long lowbound; | |
1316 | unsigned long highbound; | |
1317 | int nbytes; | |
35f5886e | 1318 | |
13b5a7ff FF |
1319 | format = target_to_host (scan, SIZEOF_FORMAT_SPECIFIER, GET_UNSIGNED, |
1320 | current_objfile); | |
1321 | scan += SIZEOF_FORMAT_SPECIFIER; | |
35f5886e FF |
1322 | switch (format) |
1323 | { | |
1324 | case FMT_ET: | |
84ffdec2 | 1325 | typep = decode_array_element_type (scan); |
35f5886e FF |
1326 | break; |
1327 | case FMT_FT_C_C: | |
13b5a7ff FF |
1328 | fundtype = target_to_host (scan, SIZEOF_FMT_FT, GET_UNSIGNED, |
1329 | current_objfile); | |
85f0a848 | 1330 | indextype = decode_fund_type (fundtype); |
13b5a7ff | 1331 | scan += SIZEOF_FMT_FT; |
160be0de FF |
1332 | nbytes = TARGET_FT_LONG_SIZE (current_objfile); |
1333 | lowbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1334 | scan += nbytes; | |
1335 | highbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1336 | scan += nbytes; | |
85f0a848 FF |
1337 | nexttype = decode_subscript_data_item (scan, end); |
1338 | if (nexttype == NULL) | |
35f5886e | 1339 | { |
85f0a848 | 1340 | /* Munged subscript data or other problem, fake it. */ |
51b80b00 | 1341 | complain (&subscript_data_items, DIE_ID, DIE_NAME); |
85f0a848 FF |
1342 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1343 | } | |
a8a69e63 FF |
1344 | rangetype = create_range_type ((struct type *) NULL, indextype, |
1345 | lowbound, highbound); | |
1346 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
35f5886e FF |
1347 | break; |
1348 | case FMT_FT_C_X: | |
1349 | case FMT_FT_X_C: | |
1350 | case FMT_FT_X_X: | |
1351 | case FMT_UT_C_C: | |
1352 | case FMT_UT_C_X: | |
1353 | case FMT_UT_X_C: | |
1354 | case FMT_UT_X_X: | |
51b80b00 | 1355 | complain (&unhandled_array_subscript_format, DIE_ID, DIE_NAME, format); |
a8a69e63 FF |
1356 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1357 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1358 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
35f5886e FF |
1359 | break; |
1360 | default: | |
51b80b00 | 1361 | complain (&unknown_array_subscript_format, DIE_ID, DIE_NAME, format); |
a8a69e63 FF |
1362 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1363 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1364 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
35f5886e FF |
1365 | break; |
1366 | } | |
1367 | return (typep); | |
1368 | } | |
1369 | ||
1370 | /* | |
1371 | ||
1372 | LOCAL FUNCTION | |
1373 | ||
4d315a07 | 1374 | dwarf_read_array_type -- read TAG_array_type DIE |
35f5886e FF |
1375 | |
1376 | SYNOPSIS | |
1377 | ||
4d315a07 | 1378 | static void dwarf_read_array_type (struct dieinfo *dip) |
35f5886e FF |
1379 | |
1380 | DESCRIPTION | |
1381 | ||
1382 | Extract all information from a TAG_array_type DIE and add to | |
1383 | the user defined type vector. | |
1384 | */ | |
1385 | ||
1386 | static void | |
1ab3bf1b JG |
1387 | dwarf_read_array_type (dip) |
1388 | struct dieinfo *dip; | |
35f5886e FF |
1389 | { |
1390 | struct type *type; | |
af213624 | 1391 | struct type *utype; |
35f5886e FF |
1392 | char *sub; |
1393 | char *subend; | |
13b5a7ff FF |
1394 | unsigned short blocksz; |
1395 | int nbytes; | |
35f5886e FF |
1396 | |
1397 | if (dip -> at_ordering != ORD_row_major) | |
1398 | { | |
1399 | /* FIXME: Can gdb even handle column major arrays? */ | |
51b80b00 | 1400 | complain (¬_row_major, DIE_ID, DIE_NAME); |
35f5886e FF |
1401 | } |
1402 | if ((sub = dip -> at_subscr_data) != NULL) | |
1403 | { | |
13b5a7ff FF |
1404 | nbytes = attribute_size (AT_subscr_data); |
1405 | blocksz = target_to_host (sub, nbytes, GET_UNSIGNED, current_objfile); | |
1406 | subend = sub + nbytes + blocksz; | |
1407 | sub += nbytes; | |
85f0a848 FF |
1408 | type = decode_subscript_data_item (sub, subend); |
1409 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) | |
35f5886e | 1410 | { |
85f0a848 FF |
1411 | /* Install user defined type that has not been referenced yet. */ |
1412 | alloc_utype (dip -> die_ref, type); | |
1413 | } | |
1414 | else if (TYPE_CODE (utype) == TYPE_CODE_UNDEF) | |
1415 | { | |
1416 | /* Ick! A forward ref has already generated a blank type in our | |
1417 | slot, and this type probably already has things pointing to it | |
1418 | (which is what caused it to be created in the first place). | |
1419 | If it's just a place holder we can plop our fully defined type | |
1420 | on top of it. We can't recover the space allocated for our | |
1421 | new type since it might be on an obstack, but we could reuse | |
1422 | it if we kept a list of them, but it might not be worth it | |
1423 | (FIXME). */ | |
1424 | *utype = *type; | |
35f5886e FF |
1425 | } |
1426 | else | |
1427 | { | |
85f0a848 FF |
1428 | /* Double ick! Not only is a type already in our slot, but |
1429 | someone has decorated it. Complain and leave it alone. */ | |
51b80b00 | 1430 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); |
35f5886e FF |
1431 | } |
1432 | } | |
1433 | } | |
1434 | ||
1435 | /* | |
1436 | ||
9e4c1921 FF |
1437 | LOCAL FUNCTION |
1438 | ||
1439 | read_tag_pointer_type -- read TAG_pointer_type DIE | |
1440 | ||
1441 | SYNOPSIS | |
1442 | ||
1443 | static void read_tag_pointer_type (struct dieinfo *dip) | |
1444 | ||
1445 | DESCRIPTION | |
1446 | ||
1447 | Extract all information from a TAG_pointer_type DIE and add to | |
1448 | the user defined type vector. | |
1449 | */ | |
1450 | ||
1451 | static void | |
1ab3bf1b JG |
1452 | read_tag_pointer_type (dip) |
1453 | struct dieinfo *dip; | |
9e4c1921 FF |
1454 | { |
1455 | struct type *type; | |
1456 | struct type *utype; | |
9e4c1921 FF |
1457 | |
1458 | type = decode_die_type (dip); | |
13b5a7ff | 1459 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) |
9e4c1921 FF |
1460 | { |
1461 | utype = lookup_pointer_type (type); | |
4ed3a9ea | 1462 | alloc_utype (dip -> die_ref, utype); |
9e4c1921 FF |
1463 | } |
1464 | else | |
1465 | { | |
1466 | TYPE_TARGET_TYPE (utype) = type; | |
1467 | TYPE_POINTER_TYPE (type) = utype; | |
1468 | ||
1469 | /* We assume the machine has only one representation for pointers! */ | |
1470 | /* FIXME: This confuses host<->target data representations, and is a | |
1471 | poor assumption besides. */ | |
1472 | ||
1473 | TYPE_LENGTH (utype) = sizeof (char *); | |
1474 | TYPE_CODE (utype) = TYPE_CODE_PTR; | |
1475 | } | |
1476 | } | |
1477 | ||
1478 | /* | |
1479 | ||
ec16f701 FF |
1480 | LOCAL FUNCTION |
1481 | ||
1482 | read_tag_string_type -- read TAG_string_type DIE | |
1483 | ||
1484 | SYNOPSIS | |
1485 | ||
1486 | static void read_tag_string_type (struct dieinfo *dip) | |
1487 | ||
1488 | DESCRIPTION | |
1489 | ||
1490 | Extract all information from a TAG_string_type DIE and add to | |
1491 | the user defined type vector. It isn't really a user defined | |
1492 | type, but it behaves like one, with other DIE's using an | |
1493 | AT_user_def_type attribute to reference it. | |
1494 | */ | |
1495 | ||
1496 | static void | |
1497 | read_tag_string_type (dip) | |
1498 | struct dieinfo *dip; | |
1499 | { | |
1500 | struct type *utype; | |
1501 | struct type *indextype; | |
1502 | struct type *rangetype; | |
1503 | unsigned long lowbound = 0; | |
1504 | unsigned long highbound; | |
1505 | ||
b6236d6e | 1506 | if (dip -> has_at_byte_size) |
ec16f701 | 1507 | { |
b6236d6e FF |
1508 | /* A fixed bounds string */ |
1509 | highbound = dip -> at_byte_size - 1; | |
ec16f701 FF |
1510 | } |
1511 | else | |
1512 | { | |
b6236d6e FF |
1513 | /* A varying length string. Stub for now. (FIXME) */ |
1514 | highbound = 1; | |
1515 | } | |
1516 | indextype = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1517 | rangetype = create_range_type ((struct type *) NULL, indextype, lowbound, | |
1518 | highbound); | |
1519 | ||
1520 | utype = lookup_utype (dip -> die_ref); | |
1521 | if (utype == NULL) | |
1522 | { | |
1523 | /* No type defined, go ahead and create a blank one to use. */ | |
1524 | utype = alloc_utype (dip -> die_ref, (struct type *) NULL); | |
1525 | } | |
1526 | else | |
1527 | { | |
1528 | /* Already a type in our slot due to a forward reference. Make sure it | |
1529 | is a blank one. If not, complain and leave it alone. */ | |
1530 | if (TYPE_CODE (utype) != TYPE_CODE_UNDEF) | |
ec16f701 | 1531 | { |
b6236d6e FF |
1532 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); |
1533 | return; | |
ec16f701 | 1534 | } |
ec16f701 | 1535 | } |
b6236d6e FF |
1536 | |
1537 | /* Create the string type using the blank type we either found or created. */ | |
1538 | utype = create_string_type (utype, rangetype); | |
ec16f701 FF |
1539 | } |
1540 | ||
1541 | /* | |
1542 | ||
35f5886e FF |
1543 | LOCAL FUNCTION |
1544 | ||
1545 | read_subroutine_type -- process TAG_subroutine_type dies | |
1546 | ||
1547 | SYNOPSIS | |
1548 | ||
1549 | static void read_subroutine_type (struct dieinfo *dip, char thisdie, | |
1550 | char *enddie) | |
1551 | ||
1552 | DESCRIPTION | |
1553 | ||
1554 | Handle DIES due to C code like: | |
1555 | ||
1556 | struct foo { | |
1557 | int (*funcp)(int a, long l); (Generates TAG_subroutine_type DIE) | |
1558 | int b; | |
1559 | }; | |
1560 | ||
1561 | NOTES | |
1562 | ||
1563 | The parameter DIES are currently ignored. See if gdb has a way to | |
1564 | include this info in it's type system, and decode them if so. Is | |
1565 | this what the type structure's "arg_types" field is for? (FIXME) | |
1566 | */ | |
1567 | ||
1568 | static void | |
1ab3bf1b JG |
1569 | read_subroutine_type (dip, thisdie, enddie) |
1570 | struct dieinfo *dip; | |
1571 | char *thisdie; | |
1572 | char *enddie; | |
35f5886e | 1573 | { |
af213624 FF |
1574 | struct type *type; /* Type that this function returns */ |
1575 | struct type *ftype; /* Function that returns above type */ | |
35f5886e | 1576 | |
af213624 FF |
1577 | /* Decode the type that this subroutine returns */ |
1578 | ||
35f5886e | 1579 | type = decode_die_type (dip); |
af213624 FF |
1580 | |
1581 | /* Check to see if we already have a partially constructed user | |
1582 | defined type for this DIE, from a forward reference. */ | |
1583 | ||
13b5a7ff | 1584 | if ((ftype = lookup_utype (dip -> die_ref)) == NULL) |
af213624 FF |
1585 | { |
1586 | /* This is the first reference to one of these types. Make | |
1587 | a new one and place it in the user defined types. */ | |
1588 | ftype = lookup_function_type (type); | |
4ed3a9ea | 1589 | alloc_utype (dip -> die_ref, ftype); |
af213624 | 1590 | } |
85f0a848 | 1591 | else if (TYPE_CODE (ftype) == TYPE_CODE_UNDEF) |
af213624 FF |
1592 | { |
1593 | /* We have an existing partially constructed type, so bash it | |
1594 | into the correct type. */ | |
1595 | TYPE_TARGET_TYPE (ftype) = type; | |
1596 | TYPE_FUNCTION_TYPE (type) = ftype; | |
1597 | TYPE_LENGTH (ftype) = 1; | |
1598 | TYPE_CODE (ftype) = TYPE_CODE_FUNC; | |
1599 | } | |
85f0a848 FF |
1600 | else |
1601 | { | |
51b80b00 | 1602 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); |
85f0a848 | 1603 | } |
35f5886e FF |
1604 | } |
1605 | ||
1606 | /* | |
1607 | ||
1608 | LOCAL FUNCTION | |
1609 | ||
1610 | read_enumeration -- process dies which define an enumeration | |
1611 | ||
1612 | SYNOPSIS | |
1613 | ||
1614 | static void read_enumeration (struct dieinfo *dip, char *thisdie, | |
1ab3bf1b | 1615 | char *enddie, struct objfile *objfile) |
35f5886e FF |
1616 | |
1617 | DESCRIPTION | |
1618 | ||
1619 | Given a pointer to a die which begins an enumeration, process all | |
1620 | the dies that define the members of the enumeration. | |
1621 | ||
1622 | NOTES | |
1623 | ||
1624 | Note that we need to call enum_type regardless of whether or not we | |
1625 | have a symbol, since we might have an enum without a tag name (thus | |
1626 | no symbol for the tagname). | |
1627 | */ | |
1628 | ||
1629 | static void | |
1ab3bf1b JG |
1630 | read_enumeration (dip, thisdie, enddie, objfile) |
1631 | struct dieinfo *dip; | |
1632 | char *thisdie; | |
1633 | char *enddie; | |
1634 | struct objfile *objfile; | |
35f5886e FF |
1635 | { |
1636 | struct type *type; | |
1637 | struct symbol *sym; | |
1638 | ||
1ab3bf1b | 1639 | type = enum_type (dip, objfile); |
95ff889e FF |
1640 | sym = new_symbol (dip, objfile); |
1641 | if (sym != NULL) | |
35f5886e FF |
1642 | { |
1643 | SYMBOL_TYPE (sym) = type; | |
95ff889e FF |
1644 | if (cu_language == language_cplus) |
1645 | { | |
1646 | synthesize_typedef (dip, objfile, type); | |
1647 | } | |
35f5886e FF |
1648 | } |
1649 | } | |
1650 | ||
1651 | /* | |
1652 | ||
1653 | LOCAL FUNCTION | |
1654 | ||
1655 | enum_type -- decode and return a type for an enumeration | |
1656 | ||
1657 | SYNOPSIS | |
1658 | ||
1ab3bf1b | 1659 | static type *enum_type (struct dieinfo *dip, struct objfile *objfile) |
35f5886e FF |
1660 | |
1661 | DESCRIPTION | |
1662 | ||
1663 | Given a pointer to a die information structure for the die which | |
1664 | starts an enumeration, process all the dies that define the members | |
1665 | of the enumeration and return a type pointer for the enumeration. | |
98618bf7 | 1666 | |
715cafcb FF |
1667 | At the same time, for each member of the enumeration, create a |
1668 | symbol for it with namespace VAR_NAMESPACE and class LOC_CONST, | |
1669 | and give it the type of the enumeration itself. | |
1670 | ||
1671 | NOTES | |
1672 | ||
98618bf7 FF |
1673 | Note that the DWARF specification explicitly mandates that enum |
1674 | constants occur in reverse order from the source program order, | |
1675 | for "consistency" and because this ordering is easier for many | |
1ab3bf1b | 1676 | compilers to generate. (Draft 6, sec 3.8.5, Enumeration type |
715cafcb FF |
1677 | Entries). Because gdb wants to see the enum members in program |
1678 | source order, we have to ensure that the order gets reversed while | |
98618bf7 | 1679 | we are processing them. |
35f5886e FF |
1680 | */ |
1681 | ||
1682 | static struct type * | |
1ab3bf1b JG |
1683 | enum_type (dip, objfile) |
1684 | struct dieinfo *dip; | |
1685 | struct objfile *objfile; | |
35f5886e FF |
1686 | { |
1687 | struct type *type; | |
1688 | struct nextfield { | |
1689 | struct nextfield *next; | |
1690 | struct field field; | |
1691 | }; | |
1692 | struct nextfield *list = NULL; | |
1693 | struct nextfield *new; | |
1694 | int nfields = 0; | |
1695 | int n; | |
35f5886e FF |
1696 | char *scan; |
1697 | char *listend; | |
13b5a7ff | 1698 | unsigned short blocksz; |
715cafcb | 1699 | struct symbol *sym; |
13b5a7ff | 1700 | int nbytes; |
35f5886e | 1701 | |
13b5a7ff | 1702 | if ((type = lookup_utype (dip -> die_ref)) == NULL) |
35f5886e | 1703 | { |
84ce6717 | 1704 | /* No forward references created an empty type, so install one now */ |
13b5a7ff | 1705 | type = alloc_utype (dip -> die_ref, NULL); |
35f5886e FF |
1706 | } |
1707 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
84ce6717 FF |
1708 | /* Some compilers try to be helpful by inventing "fake" names for |
1709 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1710 | Thanks, but no thanks... */ | |
715cafcb FF |
1711 | if (dip -> at_name != NULL |
1712 | && *dip -> at_name != '~' | |
1713 | && *dip -> at_name != '.') | |
35f5886e | 1714 | { |
b2bebdb0 JK |
1715 | TYPE_TAG_NAME (type) = obconcat (&objfile -> type_obstack, |
1716 | "", "", dip -> at_name); | |
35f5886e | 1717 | } |
715cafcb | 1718 | if (dip -> at_byte_size != 0) |
35f5886e FF |
1719 | { |
1720 | TYPE_LENGTH (type) = dip -> at_byte_size; | |
35f5886e | 1721 | } |
35f5886e FF |
1722 | if ((scan = dip -> at_element_list) != NULL) |
1723 | { | |
768be6e1 FF |
1724 | if (dip -> short_element_list) |
1725 | { | |
13b5a7ff | 1726 | nbytes = attribute_size (AT_short_element_list); |
768be6e1 FF |
1727 | } |
1728 | else | |
1729 | { | |
13b5a7ff | 1730 | nbytes = attribute_size (AT_element_list); |
768be6e1 | 1731 | } |
13b5a7ff FF |
1732 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); |
1733 | listend = scan + nbytes + blocksz; | |
1734 | scan += nbytes; | |
35f5886e FF |
1735 | while (scan < listend) |
1736 | { | |
1737 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1738 | new -> next = list; | |
1739 | list = new; | |
1740 | list -> field.type = NULL; | |
1741 | list -> field.bitsize = 0; | |
13b5a7ff FF |
1742 | list -> field.bitpos = |
1743 | target_to_host (scan, TARGET_FT_LONG_SIZE (objfile), GET_SIGNED, | |
1744 | objfile); | |
1745 | scan += TARGET_FT_LONG_SIZE (objfile); | |
50e0dc41 FF |
1746 | list -> field.name = obsavestring (scan, strlen (scan), |
1747 | &objfile -> type_obstack); | |
35f5886e FF |
1748 | scan += strlen (scan) + 1; |
1749 | nfields++; | |
715cafcb | 1750 | /* Handcraft a new symbol for this enum member. */ |
1ab3bf1b | 1751 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
715cafcb | 1752 | sizeof (struct symbol)); |
4ed3a9ea | 1753 | memset (sym, 0, sizeof (struct symbol)); |
13b5a7ff FF |
1754 | SYMBOL_NAME (sym) = create_name (list -> field.name, |
1755 | &objfile->symbol_obstack); | |
7532cf10 | 1756 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); |
715cafcb FF |
1757 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
1758 | SYMBOL_CLASS (sym) = LOC_CONST; | |
1759 | SYMBOL_TYPE (sym) = type; | |
1760 | SYMBOL_VALUE (sym) = list -> field.bitpos; | |
4d315a07 | 1761 | add_symbol_to_list (sym, list_in_scope); |
35f5886e | 1762 | } |
84ce6717 | 1763 | /* Now create the vector of fields, and record how big it is. This is |
0efe20a6 | 1764 | where we reverse the order, by pulling the members off the list in |
84ce6717 FF |
1765 | reverse order from how they were inserted. If we have no fields |
1766 | (this is apparently possible in C++) then skip building a field | |
1767 | vector. */ | |
1768 | if (nfields > 0) | |
1769 | { | |
1770 | TYPE_NFIELDS (type) = nfields; | |
1771 | TYPE_FIELDS (type) = (struct field *) | |
1ab3bf1b | 1772 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct field) * nfields); |
84ce6717 FF |
1773 | /* Copy the saved-up fields into the field vector. */ |
1774 | for (n = 0; (n < nfields) && (list != NULL); list = list -> next) | |
1775 | { | |
1776 | TYPE_FIELD (type, n++) = list -> field; | |
1777 | } | |
1778 | } | |
35f5886e | 1779 | } |
35f5886e FF |
1780 | return (type); |
1781 | } | |
1782 | ||
1783 | /* | |
1784 | ||
1785 | LOCAL FUNCTION | |
1786 | ||
1787 | read_func_scope -- process all dies within a function scope | |
1788 | ||
35f5886e FF |
1789 | DESCRIPTION |
1790 | ||
1791 | Process all dies within a given function scope. We are passed | |
1792 | a die information structure pointer DIP for the die which | |
1793 | starts the function scope, and pointers into the raw die data | |
1794 | that define the dies within the function scope. | |
1795 | ||
1796 | For now, we ignore lexical block scopes within the function. | |
1797 | The problem is that AT&T cc does not define a DWARF lexical | |
1798 | block scope for the function itself, while gcc defines a | |
1799 | lexical block scope for the function. We need to think about | |
1800 | how to handle this difference, or if it is even a problem. | |
1801 | (FIXME) | |
1802 | */ | |
1803 | ||
1804 | static void | |
1ab3bf1b JG |
1805 | read_func_scope (dip, thisdie, enddie, objfile) |
1806 | struct dieinfo *dip; | |
1807 | char *thisdie; | |
1808 | char *enddie; | |
1809 | struct objfile *objfile; | |
35f5886e | 1810 | { |
4d315a07 | 1811 | register struct context_stack *new; |
35f5886e | 1812 | |
5e2e79f8 FF |
1813 | if (objfile -> ei.entry_point >= dip -> at_low_pc && |
1814 | objfile -> ei.entry_point < dip -> at_high_pc) | |
35f5886e | 1815 | { |
5e2e79f8 FF |
1816 | objfile -> ei.entry_func_lowpc = dip -> at_low_pc; |
1817 | objfile -> ei.entry_func_highpc = dip -> at_high_pc; | |
35f5886e | 1818 | } |
4d315a07 | 1819 | if (STREQ (dip -> at_name, "main")) /* FIXME: hardwired name */ |
35f5886e | 1820 | { |
5e2e79f8 FF |
1821 | objfile -> ei.main_func_lowpc = dip -> at_low_pc; |
1822 | objfile -> ei.main_func_highpc = dip -> at_high_pc; | |
35f5886e | 1823 | } |
4d315a07 | 1824 | new = push_context (0, dip -> at_low_pc); |
1ab3bf1b | 1825 | new -> name = new_symbol (dip, objfile); |
4d315a07 | 1826 | list_in_scope = &local_symbols; |
13b5a7ff | 1827 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 FF |
1828 | new = pop_context (); |
1829 | /* Make a block for the local symbols within. */ | |
1830 | finish_block (new -> name, &local_symbols, new -> old_blocks, | |
1ab3bf1b | 1831 | new -> start_addr, dip -> at_high_pc, objfile); |
4d315a07 | 1832 | list_in_scope = &file_symbols; |
35f5886e FF |
1833 | } |
1834 | ||
2dbde378 FF |
1835 | |
1836 | /* | |
1837 | ||
1838 | LOCAL FUNCTION | |
1839 | ||
1840 | handle_producer -- process the AT_producer attribute | |
1841 | ||
1842 | DESCRIPTION | |
1843 | ||
1844 | Perform any operations that depend on finding a particular | |
1845 | AT_producer attribute. | |
1846 | ||
1847 | */ | |
1848 | ||
1849 | static void | |
1850 | handle_producer (producer) | |
1851 | char *producer; | |
1852 | { | |
1853 | ||
1854 | /* If this compilation unit was compiled with g++ or gcc, then set the | |
1855 | processing_gcc_compilation flag. */ | |
1856 | ||
1857 | processing_gcc_compilation = | |
1858 | STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER)) | |
93bb6e65 | 1859 | || STREQN (producer, CHILL_PRODUCER, strlen (CHILL_PRODUCER)) |
2dbde378 FF |
1860 | || STREQN (producer, GCC_PRODUCER, strlen (GCC_PRODUCER)); |
1861 | ||
1862 | /* Select a demangling style if we can identify the producer and if | |
1863 | the current style is auto. We leave the current style alone if it | |
1864 | is not auto. We also leave the demangling style alone if we find a | |
1865 | gcc (cc1) producer, as opposed to a g++ (cc1plus) producer. */ | |
1866 | ||
3dc755fb | 1867 | if (AUTO_DEMANGLING) |
2dbde378 FF |
1868 | { |
1869 | if (STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER))) | |
1870 | { | |
1871 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); | |
1872 | } | |
1873 | else if (STREQN (producer, LCC_PRODUCER, strlen (LCC_PRODUCER))) | |
1874 | { | |
1875 | set_demangling_style (LUCID_DEMANGLING_STYLE_STRING); | |
1876 | } | |
2dbde378 | 1877 | } |
2dbde378 FF |
1878 | } |
1879 | ||
1880 | ||
35f5886e FF |
1881 | /* |
1882 | ||
1883 | LOCAL FUNCTION | |
1884 | ||
1885 | read_file_scope -- process all dies within a file scope | |
1886 | ||
35f5886e FF |
1887 | DESCRIPTION |
1888 | ||
1889 | Process all dies within a given file scope. We are passed a | |
1890 | pointer to the die information structure for the die which | |
1891 | starts the file scope, and pointers into the raw die data which | |
1892 | mark the range of dies within the file scope. | |
1893 | ||
1894 | When the partial symbol table is built, the file offset for the line | |
1895 | number table for each compilation unit is saved in the partial symbol | |
1896 | table entry for that compilation unit. As the symbols for each | |
1897 | compilation unit are read, the line number table is read into memory | |
1898 | and the variable lnbase is set to point to it. Thus all we have to | |
1899 | do is use lnbase to access the line number table for the current | |
1900 | compilation unit. | |
1901 | */ | |
1902 | ||
1903 | static void | |
1ab3bf1b JG |
1904 | read_file_scope (dip, thisdie, enddie, objfile) |
1905 | struct dieinfo *dip; | |
1906 | char *thisdie; | |
1907 | char *enddie; | |
1908 | struct objfile *objfile; | |
35f5886e FF |
1909 | { |
1910 | struct cleanup *back_to; | |
4d315a07 | 1911 | struct symtab *symtab; |
35f5886e | 1912 | |
5e2e79f8 FF |
1913 | if (objfile -> ei.entry_point >= dip -> at_low_pc && |
1914 | objfile -> ei.entry_point < dip -> at_high_pc) | |
35f5886e | 1915 | { |
5e2e79f8 FF |
1916 | objfile -> ei.entry_file_lowpc = dip -> at_low_pc; |
1917 | objfile -> ei.entry_file_highpc = dip -> at_high_pc; | |
35f5886e | 1918 | } |
95ff889e | 1919 | set_cu_language (dip); |
4d315a07 FF |
1920 | if (dip -> at_producer != NULL) |
1921 | { | |
2dbde378 | 1922 | handle_producer (dip -> at_producer); |
4d315a07 | 1923 | } |
35f5886e FF |
1924 | numutypes = (enddie - thisdie) / 4; |
1925 | utypes = (struct type **) xmalloc (numutypes * sizeof (struct type *)); | |
1926 | back_to = make_cleanup (free, utypes); | |
4ed3a9ea | 1927 | memset (utypes, 0, numutypes * sizeof (struct type *)); |
bf229b4e | 1928 | memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *)); |
d4902ab0 | 1929 | start_symtab (dip -> at_name, dip -> at_comp_dir, dip -> at_low_pc); |
35f5886e | 1930 | decode_line_numbers (lnbase); |
13b5a7ff | 1931 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
3c02636b JK |
1932 | |
1933 | symtab = end_symtab (dip -> at_high_pc, 0, 0, objfile, 0); | |
7b5d9650 | 1934 | if (symtab != NULL) |
4d315a07 | 1935 | { |
95ff889e | 1936 | symtab -> language = cu_language; |
7b5d9650 | 1937 | } |
35f5886e FF |
1938 | do_cleanups (back_to); |
1939 | utypes = NULL; | |
1940 | numutypes = 0; | |
1941 | } | |
1942 | ||
1943 | /* | |
1944 | ||
35f5886e FF |
1945 | LOCAL FUNCTION |
1946 | ||
1947 | process_dies -- process a range of DWARF Information Entries | |
1948 | ||
1949 | SYNOPSIS | |
1950 | ||
8b5b6fae FF |
1951 | static void process_dies (char *thisdie, char *enddie, |
1952 | struct objfile *objfile) | |
35f5886e FF |
1953 | |
1954 | DESCRIPTION | |
1955 | ||
1956 | Process all DIE's in a specified range. May be (and almost | |
1957 | certainly will be) called recursively. | |
1958 | */ | |
1959 | ||
1960 | static void | |
1ab3bf1b JG |
1961 | process_dies (thisdie, enddie, objfile) |
1962 | char *thisdie; | |
1963 | char *enddie; | |
1964 | struct objfile *objfile; | |
35f5886e FF |
1965 | { |
1966 | char *nextdie; | |
1967 | struct dieinfo di; | |
1968 | ||
1969 | while (thisdie < enddie) | |
1970 | { | |
95967e73 | 1971 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 1972 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
1973 | { |
1974 | break; | |
1975 | } | |
13b5a7ff | 1976 | else if (di.die_tag == TAG_padding) |
35f5886e | 1977 | { |
13b5a7ff | 1978 | nextdie = thisdie + di.die_length; |
35f5886e FF |
1979 | } |
1980 | else | |
1981 | { | |
95967e73 | 1982 | completedieinfo (&di, objfile); |
35f5886e FF |
1983 | if (di.at_sibling != 0) |
1984 | { | |
1985 | nextdie = dbbase + di.at_sibling - dbroff; | |
1986 | } | |
1987 | else | |
1988 | { | |
13b5a7ff | 1989 | nextdie = thisdie + di.die_length; |
35f5886e | 1990 | } |
9fdb3f7a JK |
1991 | #ifdef SMASH_TEXT_ADDRESS |
1992 | /* I think that these are always text, not data, addresses. */ | |
1993 | SMASH_TEXT_ADDRESS (di.at_low_pc); | |
1994 | SMASH_TEXT_ADDRESS (di.at_high_pc); | |
1995 | #endif | |
13b5a7ff | 1996 | switch (di.die_tag) |
35f5886e FF |
1997 | { |
1998 | case TAG_compile_unit: | |
4386eff2 PS |
1999 | /* Skip Tag_compile_unit if we are already inside a compilation |
2000 | unit, we are unable to handle nested compilation units | |
2001 | properly (FIXME). */ | |
2002 | if (current_subfile == NULL) | |
2003 | read_file_scope (&di, thisdie, nextdie, objfile); | |
2004 | else | |
2005 | nextdie = thisdie + di.die_length; | |
35f5886e FF |
2006 | break; |
2007 | case TAG_global_subroutine: | |
2008 | case TAG_subroutine: | |
2d6186f4 | 2009 | if (di.has_at_low_pc) |
35f5886e | 2010 | { |
a048c8f5 | 2011 | read_func_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2012 | } |
2013 | break; | |
2014 | case TAG_lexical_block: | |
a048c8f5 | 2015 | read_lexical_block_scope (&di, thisdie, nextdie, objfile); |
35f5886e | 2016 | break; |
95ff889e | 2017 | case TAG_class_type: |
35f5886e FF |
2018 | case TAG_structure_type: |
2019 | case TAG_union_type: | |
8b5b6fae | 2020 | read_structure_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2021 | break; |
2022 | case TAG_enumeration_type: | |
1ab3bf1b | 2023 | read_enumeration (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2024 | break; |
2025 | case TAG_subroutine_type: | |
2026 | read_subroutine_type (&di, thisdie, nextdie); | |
2027 | break; | |
2028 | case TAG_array_type: | |
4d315a07 | 2029 | dwarf_read_array_type (&di); |
35f5886e | 2030 | break; |
9e4c1921 FF |
2031 | case TAG_pointer_type: |
2032 | read_tag_pointer_type (&di); | |
2033 | break; | |
ec16f701 FF |
2034 | case TAG_string_type: |
2035 | read_tag_string_type (&di); | |
2036 | break; | |
35f5886e | 2037 | default: |
4ed3a9ea | 2038 | new_symbol (&di, objfile); |
35f5886e FF |
2039 | break; |
2040 | } | |
2041 | } | |
2042 | thisdie = nextdie; | |
2043 | } | |
2044 | } | |
2045 | ||
2046 | /* | |
2047 | ||
35f5886e FF |
2048 | LOCAL FUNCTION |
2049 | ||
2050 | decode_line_numbers -- decode a line number table fragment | |
2051 | ||
2052 | SYNOPSIS | |
2053 | ||
2054 | static void decode_line_numbers (char *tblscan, char *tblend, | |
2055 | long length, long base, long line, long pc) | |
2056 | ||
2057 | DESCRIPTION | |
2058 | ||
2059 | Translate the DWARF line number information to gdb form. | |
2060 | ||
2061 | The ".line" section contains one or more line number tables, one for | |
2062 | each ".line" section from the objects that were linked. | |
2063 | ||
2064 | The AT_stmt_list attribute for each TAG_source_file entry in the | |
2065 | ".debug" section contains the offset into the ".line" section for the | |
2066 | start of the table for that file. | |
2067 | ||
2068 | The table itself has the following structure: | |
2069 | ||
2070 | <table length><base address><source statement entry> | |
2071 | 4 bytes 4 bytes 10 bytes | |
2072 | ||
2073 | The table length is the total size of the table, including the 4 bytes | |
2074 | for the length information. | |
2075 | ||
2076 | The base address is the address of the first instruction generated | |
2077 | for the source file. | |
2078 | ||
2079 | Each source statement entry has the following structure: | |
2080 | ||
2081 | <line number><statement position><address delta> | |
2082 | 4 bytes 2 bytes 4 bytes | |
2083 | ||
2084 | The line number is relative to the start of the file, starting with | |
2085 | line 1. | |
2086 | ||
2087 | The statement position either -1 (0xFFFF) or the number of characters | |
2088 | from the beginning of the line to the beginning of the statement. | |
2089 | ||
2090 | The address delta is the difference between the base address and | |
2091 | the address of the first instruction for the statement. | |
2092 | ||
2093 | Note that we must copy the bytes from the packed table to our local | |
2094 | variables before attempting to use them, to avoid alignment problems | |
2095 | on some machines, particularly RISC processors. | |
2096 | ||
2097 | BUGS | |
2098 | ||
2099 | Does gdb expect the line numbers to be sorted? They are now by | |
2100 | chance/luck, but are not required to be. (FIXME) | |
2101 | ||
2102 | The line with number 0 is unused, gdb apparently can discover the | |
2103 | span of the last line some other way. How? (FIXME) | |
2104 | */ | |
2105 | ||
2106 | static void | |
1ab3bf1b JG |
2107 | decode_line_numbers (linetable) |
2108 | char *linetable; | |
35f5886e FF |
2109 | { |
2110 | char *tblscan; | |
2111 | char *tblend; | |
13b5a7ff FF |
2112 | unsigned long length; |
2113 | unsigned long base; | |
2114 | unsigned long line; | |
2115 | unsigned long pc; | |
35f5886e FF |
2116 | |
2117 | if (linetable != NULL) | |
2118 | { | |
2119 | tblscan = tblend = linetable; | |
13b5a7ff FF |
2120 | length = target_to_host (tblscan, SIZEOF_LINETBL_LENGTH, GET_UNSIGNED, |
2121 | current_objfile); | |
2122 | tblscan += SIZEOF_LINETBL_LENGTH; | |
35f5886e | 2123 | tblend += length; |
13b5a7ff FF |
2124 | base = target_to_host (tblscan, TARGET_FT_POINTER_SIZE (objfile), |
2125 | GET_UNSIGNED, current_objfile); | |
2126 | tblscan += TARGET_FT_POINTER_SIZE (objfile); | |
35f5886e | 2127 | base += baseaddr; |
35f5886e FF |
2128 | while (tblscan < tblend) |
2129 | { | |
13b5a7ff FF |
2130 | line = target_to_host (tblscan, SIZEOF_LINETBL_LINENO, GET_UNSIGNED, |
2131 | current_objfile); | |
2132 | tblscan += SIZEOF_LINETBL_LINENO + SIZEOF_LINETBL_STMT; | |
2133 | pc = target_to_host (tblscan, SIZEOF_LINETBL_DELTA, GET_UNSIGNED, | |
2134 | current_objfile); | |
2135 | tblscan += SIZEOF_LINETBL_DELTA; | |
35f5886e | 2136 | pc += base; |
13b5a7ff | 2137 | if (line != 0) |
35f5886e | 2138 | { |
4d315a07 | 2139 | record_line (current_subfile, line, pc); |
35f5886e FF |
2140 | } |
2141 | } | |
2142 | } | |
2143 | } | |
2144 | ||
2145 | /* | |
2146 | ||
35f5886e FF |
2147 | LOCAL FUNCTION |
2148 | ||
2149 | locval -- compute the value of a location attribute | |
2150 | ||
2151 | SYNOPSIS | |
2152 | ||
2153 | static int locval (char *loc) | |
2154 | ||
2155 | DESCRIPTION | |
2156 | ||
2157 | Given pointer to a string of bytes that define a location, compute | |
2158 | the location and return the value. | |
2159 | ||
2160 | When computing values involving the current value of the frame pointer, | |
2161 | the value zero is used, which results in a value relative to the frame | |
2162 | pointer, rather than the absolute value. This is what GDB wants | |
2163 | anyway. | |
2164 | ||
2165 | When the result is a register number, the global isreg flag is set, | |
2166 | otherwise it is cleared. This is a kludge until we figure out a better | |
2167 | way to handle the problem. Gdb's design does not mesh well with the | |
2168 | DWARF notion of a location computing interpreter, which is a shame | |
2169 | because the flexibility goes unused. | |
2170 | ||
2171 | NOTES | |
2172 | ||
2173 | Note that stack[0] is unused except as a default error return. | |
2174 | Note that stack overflow is not yet handled. | |
2175 | */ | |
2176 | ||
2177 | static int | |
1ab3bf1b JG |
2178 | locval (loc) |
2179 | char *loc; | |
35f5886e FF |
2180 | { |
2181 | unsigned short nbytes; | |
13b5a7ff FF |
2182 | unsigned short locsize; |
2183 | auto long stack[64]; | |
35f5886e FF |
2184 | int stacki; |
2185 | char *end; | |
13b5a7ff FF |
2186 | int loc_atom_code; |
2187 | int loc_value_size; | |
35f5886e | 2188 | |
13b5a7ff FF |
2189 | nbytes = attribute_size (AT_location); |
2190 | locsize = target_to_host (loc, nbytes, GET_UNSIGNED, current_objfile); | |
2191 | loc += nbytes; | |
2192 | end = loc + locsize; | |
35f5886e FF |
2193 | stacki = 0; |
2194 | stack[stacki] = 0; | |
2195 | isreg = 0; | |
a5bd5ba6 | 2196 | offreg = 0; |
13b5a7ff FF |
2197 | loc_value_size = TARGET_FT_LONG_SIZE (current_objfile); |
2198 | while (loc < end) | |
35f5886e | 2199 | { |
13b5a7ff FF |
2200 | loc_atom_code = target_to_host (loc, SIZEOF_LOC_ATOM_CODE, GET_UNSIGNED, |
2201 | current_objfile); | |
2202 | loc += SIZEOF_LOC_ATOM_CODE; | |
2203 | switch (loc_atom_code) | |
2204 | { | |
2205 | case 0: | |
2206 | /* error */ | |
2207 | loc = end; | |
2208 | break; | |
2209 | case OP_REG: | |
2210 | /* push register (number) */ | |
2211 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2212 | GET_UNSIGNED, current_objfile); | |
2213 | loc += loc_value_size; | |
2214 | isreg = 1; | |
2215 | break; | |
2216 | case OP_BASEREG: | |
2217 | /* push value of register (number) */ | |
a1c8d76e JK |
2218 | /* Actually, we compute the value as if register has 0, so the |
2219 | value ends up being the offset from that register. */ | |
13b5a7ff | 2220 | offreg = 1; |
a1c8d76e JK |
2221 | basereg = target_to_host (loc, loc_value_size, GET_UNSIGNED, |
2222 | current_objfile); | |
13b5a7ff | 2223 | loc += loc_value_size; |
a1c8d76e | 2224 | stack[++stacki] = 0; |
13b5a7ff FF |
2225 | break; |
2226 | case OP_ADDR: | |
2227 | /* push address (relocated address) */ | |
2228 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2229 | GET_UNSIGNED, current_objfile); | |
2230 | loc += loc_value_size; | |
2231 | break; | |
2232 | case OP_CONST: | |
2233 | /* push constant (number) FIXME: signed or unsigned! */ | |
2234 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2235 | GET_SIGNED, current_objfile); | |
2236 | loc += loc_value_size; | |
2237 | break; | |
2238 | case OP_DEREF2: | |
2239 | /* pop, deref and push 2 bytes (as a long) */ | |
51b80b00 | 2240 | complain (&op_deref2, DIE_ID, DIE_NAME, stack[stacki]); |
13b5a7ff FF |
2241 | break; |
2242 | case OP_DEREF4: /* pop, deref and push 4 bytes (as a long) */ | |
51b80b00 | 2243 | complain (&op_deref4, DIE_ID, DIE_NAME, stack[stacki]); |
13b5a7ff FF |
2244 | break; |
2245 | case OP_ADD: /* pop top 2 items, add, push result */ | |
2246 | stack[stacki - 1] += stack[stacki]; | |
2247 | stacki--; | |
2248 | break; | |
2249 | } | |
35f5886e FF |
2250 | } |
2251 | return (stack[stacki]); | |
2252 | } | |
2253 | ||
2254 | /* | |
2255 | ||
2256 | LOCAL FUNCTION | |
2257 | ||
2258 | read_ofile_symtab -- build a full symtab entry from chunk of DIE's | |
2259 | ||
2260 | SYNOPSIS | |
2261 | ||
c701c14c | 2262 | static void read_ofile_symtab (struct partial_symtab *pst) |
35f5886e FF |
2263 | |
2264 | DESCRIPTION | |
2265 | ||
1ab3bf1b JG |
2266 | When expanding a partial symbol table entry to a full symbol table |
2267 | entry, this is the function that gets called to read in the symbols | |
c701c14c FF |
2268 | for the compilation unit. A pointer to the newly constructed symtab, |
2269 | which is now the new first one on the objfile's symtab list, is | |
2270 | stashed in the partial symbol table entry. | |
35f5886e FF |
2271 | */ |
2272 | ||
c701c14c | 2273 | static void |
1ab3bf1b JG |
2274 | read_ofile_symtab (pst) |
2275 | struct partial_symtab *pst; | |
35f5886e FF |
2276 | { |
2277 | struct cleanup *back_to; | |
13b5a7ff | 2278 | unsigned long lnsize; |
d5931d79 | 2279 | file_ptr foffset; |
1ab3bf1b | 2280 | bfd *abfd; |
13b5a7ff | 2281 | char lnsizedata[SIZEOF_LINETBL_LENGTH]; |
1ab3bf1b JG |
2282 | |
2283 | abfd = pst -> objfile -> obfd; | |
2284 | current_objfile = pst -> objfile; | |
2285 | ||
35f5886e FF |
2286 | /* Allocate a buffer for the entire chunk of DIE's for this compilation |
2287 | unit, seek to the location in the file, and read in all the DIE's. */ | |
2288 | ||
2289 | diecount = 0; | |
4090fe1c FF |
2290 | dbsize = DBLENGTH (pst); |
2291 | dbbase = xmalloc (dbsize); | |
35f5886e FF |
2292 | dbroff = DBROFF(pst); |
2293 | foffset = DBFOFF(pst) + dbroff; | |
2670f34d JG |
2294 | base_section_offsets = pst->section_offsets; |
2295 | baseaddr = ANOFFSET (pst->section_offsets, 0); | |
d5931d79 | 2296 | if (bfd_seek (abfd, foffset, L_SET) || |
4090fe1c | 2297 | (bfd_read (dbbase, dbsize, 1, abfd) != dbsize)) |
35f5886e FF |
2298 | { |
2299 | free (dbbase); | |
2300 | error ("can't read DWARF data"); | |
2301 | } | |
2302 | back_to = make_cleanup (free, dbbase); | |
2303 | ||
2304 | /* If there is a line number table associated with this compilation unit | |
13b5a7ff FF |
2305 | then read the size of this fragment in bytes, from the fragment itself. |
2306 | Allocate a buffer for the fragment and read it in for future | |
35f5886e FF |
2307 | processing. */ |
2308 | ||
2309 | lnbase = NULL; | |
2310 | if (LNFOFF (pst)) | |
2311 | { | |
d5931d79 | 2312 | if (bfd_seek (abfd, LNFOFF (pst), L_SET) || |
13b5a7ff FF |
2313 | (bfd_read ((PTR) lnsizedata, sizeof (lnsizedata), 1, abfd) != |
2314 | sizeof (lnsizedata))) | |
35f5886e FF |
2315 | { |
2316 | error ("can't read DWARF line number table size"); | |
2317 | } | |
13b5a7ff FF |
2318 | lnsize = target_to_host (lnsizedata, SIZEOF_LINETBL_LENGTH, |
2319 | GET_UNSIGNED, pst -> objfile); | |
35f5886e | 2320 | lnbase = xmalloc (lnsize); |
d5931d79 | 2321 | if (bfd_seek (abfd, LNFOFF (pst), L_SET) || |
a048c8f5 | 2322 | (bfd_read (lnbase, lnsize, 1, abfd) != lnsize)) |
35f5886e FF |
2323 | { |
2324 | free (lnbase); | |
2325 | error ("can't read DWARF line numbers"); | |
2326 | } | |
2327 | make_cleanup (free, lnbase); | |
2328 | } | |
2329 | ||
4090fe1c | 2330 | process_dies (dbbase, dbbase + dbsize, pst -> objfile); |
35f5886e | 2331 | do_cleanups (back_to); |
1ab3bf1b | 2332 | current_objfile = NULL; |
c701c14c | 2333 | pst -> symtab = pst -> objfile -> symtabs; |
35f5886e FF |
2334 | } |
2335 | ||
2336 | /* | |
2337 | ||
2338 | LOCAL FUNCTION | |
2339 | ||
2340 | psymtab_to_symtab_1 -- do grunt work for building a full symtab entry | |
2341 | ||
2342 | SYNOPSIS | |
2343 | ||
a048c8f5 | 2344 | static void psymtab_to_symtab_1 (struct partial_symtab *pst) |
35f5886e FF |
2345 | |
2346 | DESCRIPTION | |
2347 | ||
2348 | Called once for each partial symbol table entry that needs to be | |
2349 | expanded into a full symbol table entry. | |
2350 | ||
2351 | */ | |
2352 | ||
2353 | static void | |
1ab3bf1b JG |
2354 | psymtab_to_symtab_1 (pst) |
2355 | struct partial_symtab *pst; | |
35f5886e FF |
2356 | { |
2357 | int i; | |
d07734e3 | 2358 | struct cleanup *old_chain; |
35f5886e | 2359 | |
1ab3bf1b | 2360 | if (pst != NULL) |
35f5886e | 2361 | { |
1ab3bf1b | 2362 | if (pst->readin) |
35f5886e | 2363 | { |
318bf84f | 2364 | warning ("psymtab for %s already read in. Shouldn't happen.", |
1ab3bf1b JG |
2365 | pst -> filename); |
2366 | } | |
2367 | else | |
2368 | { | |
2369 | /* Read in all partial symtabs on which this one is dependent */ | |
2370 | for (i = 0; i < pst -> number_of_dependencies; i++) | |
2371 | { | |
2372 | if (!pst -> dependencies[i] -> readin) | |
2373 | { | |
2374 | /* Inform about additional files that need to be read in. */ | |
2375 | if (info_verbose) | |
2376 | { | |
199b2450 | 2377 | fputs_filtered (" ", gdb_stdout); |
1ab3bf1b | 2378 | wrap_here (""); |
199b2450 | 2379 | fputs_filtered ("and ", gdb_stdout); |
1ab3bf1b JG |
2380 | wrap_here (""); |
2381 | printf_filtered ("%s...", | |
2382 | pst -> dependencies[i] -> filename); | |
2383 | wrap_here (""); | |
199b2450 | 2384 | gdb_flush (gdb_stdout); /* Flush output */ |
1ab3bf1b JG |
2385 | } |
2386 | psymtab_to_symtab_1 (pst -> dependencies[i]); | |
2387 | } | |
2388 | } | |
2389 | if (DBLENGTH (pst)) /* Otherwise it's a dummy */ | |
2390 | { | |
d07734e3 FF |
2391 | buildsym_init (); |
2392 | old_chain = make_cleanup (really_free_pendings, 0); | |
c701c14c | 2393 | read_ofile_symtab (pst); |
1ab3bf1b JG |
2394 | if (info_verbose) |
2395 | { | |
2396 | printf_filtered ("%d DIE's, sorting...", diecount); | |
2397 | wrap_here (""); | |
199b2450 | 2398 | gdb_flush (gdb_stdout); |
1ab3bf1b JG |
2399 | } |
2400 | sort_symtab_syms (pst -> symtab); | |
d07734e3 | 2401 | do_cleanups (old_chain); |
1ab3bf1b JG |
2402 | } |
2403 | pst -> readin = 1; | |
35f5886e | 2404 | } |
35f5886e | 2405 | } |
35f5886e FF |
2406 | } |
2407 | ||
2408 | /* | |
2409 | ||
2410 | LOCAL FUNCTION | |
2411 | ||
2412 | dwarf_psymtab_to_symtab -- build a full symtab entry from partial one | |
2413 | ||
2414 | SYNOPSIS | |
2415 | ||
2416 | static void dwarf_psymtab_to_symtab (struct partial_symtab *pst) | |
2417 | ||
2418 | DESCRIPTION | |
2419 | ||
2420 | This is the DWARF support entry point for building a full symbol | |
2421 | table entry from a partial symbol table entry. We are passed a | |
2422 | pointer to the partial symbol table entry that needs to be expanded. | |
2423 | ||
2424 | */ | |
2425 | ||
2426 | static void | |
1ab3bf1b JG |
2427 | dwarf_psymtab_to_symtab (pst) |
2428 | struct partial_symtab *pst; | |
35f5886e | 2429 | { |
7d9884b9 | 2430 | |
1ab3bf1b | 2431 | if (pst != NULL) |
35f5886e | 2432 | { |
1ab3bf1b | 2433 | if (pst -> readin) |
35f5886e | 2434 | { |
318bf84f | 2435 | warning ("psymtab for %s already read in. Shouldn't happen.", |
1ab3bf1b | 2436 | pst -> filename); |
35f5886e | 2437 | } |
1ab3bf1b | 2438 | else |
35f5886e | 2439 | { |
1ab3bf1b JG |
2440 | if (DBLENGTH (pst) || pst -> number_of_dependencies) |
2441 | { | |
2442 | /* Print the message now, before starting serious work, to avoid | |
2443 | disconcerting pauses. */ | |
2444 | if (info_verbose) | |
2445 | { | |
2446 | printf_filtered ("Reading in symbols for %s...", | |
2447 | pst -> filename); | |
199b2450 | 2448 | gdb_flush (gdb_stdout); |
1ab3bf1b JG |
2449 | } |
2450 | ||
2451 | psymtab_to_symtab_1 (pst); | |
2452 | ||
2453 | #if 0 /* FIXME: Check to see what dbxread is doing here and see if | |
2454 | we need to do an equivalent or is this something peculiar to | |
2455 | stabs/a.out format. | |
2456 | Match with global symbols. This only needs to be done once, | |
2457 | after all of the symtabs and dependencies have been read in. | |
2458 | */ | |
2459 | scan_file_globals (pst -> objfile); | |
2460 | #endif | |
2461 | ||
2462 | /* Finish up the verbose info message. */ | |
2463 | if (info_verbose) | |
2464 | { | |
2465 | printf_filtered ("done.\n"); | |
199b2450 | 2466 | gdb_flush (gdb_stdout); |
1ab3bf1b JG |
2467 | } |
2468 | } | |
35f5886e FF |
2469 | } |
2470 | } | |
2471 | } | |
2472 | ||
2473 | /* | |
2474 | ||
2475 | LOCAL FUNCTION | |
2476 | ||
2477 | init_psymbol_list -- initialize storage for partial symbols | |
2478 | ||
2479 | SYNOPSIS | |
2480 | ||
1ab3bf1b | 2481 | static void init_psymbol_list (struct objfile *objfile, int total_symbols) |
35f5886e FF |
2482 | |
2483 | DESCRIPTION | |
2484 | ||
2485 | Initializes storage for all of the partial symbols that will be | |
2486 | created by dwarf_build_psymtabs and subsidiaries. | |
2487 | */ | |
2488 | ||
2489 | static void | |
1ab3bf1b JG |
2490 | init_psymbol_list (objfile, total_symbols) |
2491 | struct objfile *objfile; | |
2492 | int total_symbols; | |
35f5886e FF |
2493 | { |
2494 | /* Free any previously allocated psymbol lists. */ | |
2495 | ||
1ab3bf1b | 2496 | if (objfile -> global_psymbols.list) |
35f5886e | 2497 | { |
84ffdec2 | 2498 | mfree (objfile -> md, (PTR)objfile -> global_psymbols.list); |
35f5886e | 2499 | } |
1ab3bf1b | 2500 | if (objfile -> static_psymbols.list) |
35f5886e | 2501 | { |
84ffdec2 | 2502 | mfree (objfile -> md, (PTR)objfile -> static_psymbols.list); |
35f5886e FF |
2503 | } |
2504 | ||
2505 | /* Current best guess is that there are approximately a twentieth | |
2506 | of the total symbols (in a debugging file) are global or static | |
2507 | oriented symbols */ | |
2508 | ||
1ab3bf1b JG |
2509 | objfile -> global_psymbols.size = total_symbols / 10; |
2510 | objfile -> static_psymbols.size = total_symbols / 10; | |
2511 | objfile -> global_psymbols.next = | |
2512 | objfile -> global_psymbols.list = (struct partial_symbol *) | |
318bf84f | 2513 | xmmalloc (objfile -> md, objfile -> global_psymbols.size |
1ab3bf1b JG |
2514 | * sizeof (struct partial_symbol)); |
2515 | objfile -> static_psymbols.next = | |
2516 | objfile -> static_psymbols.list = (struct partial_symbol *) | |
318bf84f | 2517 | xmmalloc (objfile -> md, objfile -> static_psymbols.size |
1ab3bf1b | 2518 | * sizeof (struct partial_symbol)); |
35f5886e FF |
2519 | } |
2520 | ||
35f5886e FF |
2521 | /* |
2522 | ||
715cafcb FF |
2523 | LOCAL FUNCTION |
2524 | ||
2525 | add_enum_psymbol -- add enumeration members to partial symbol table | |
2526 | ||
2527 | DESCRIPTION | |
2528 | ||
2529 | Given pointer to a DIE that is known to be for an enumeration, | |
2530 | extract the symbolic names of the enumeration members and add | |
2531 | partial symbols for them. | |
2532 | */ | |
2533 | ||
2534 | static void | |
1ab3bf1b JG |
2535 | add_enum_psymbol (dip, objfile) |
2536 | struct dieinfo *dip; | |
2537 | struct objfile *objfile; | |
715cafcb FF |
2538 | { |
2539 | char *scan; | |
2540 | char *listend; | |
13b5a7ff FF |
2541 | unsigned short blocksz; |
2542 | int nbytes; | |
715cafcb FF |
2543 | |
2544 | if ((scan = dip -> at_element_list) != NULL) | |
2545 | { | |
2546 | if (dip -> short_element_list) | |
2547 | { | |
13b5a7ff | 2548 | nbytes = attribute_size (AT_short_element_list); |
715cafcb FF |
2549 | } |
2550 | else | |
2551 | { | |
13b5a7ff | 2552 | nbytes = attribute_size (AT_element_list); |
715cafcb | 2553 | } |
13b5a7ff FF |
2554 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); |
2555 | scan += nbytes; | |
2556 | listend = scan + blocksz; | |
715cafcb FF |
2557 | while (scan < listend) |
2558 | { | |
13b5a7ff | 2559 | scan += TARGET_FT_LONG_SIZE (objfile); |
b440b1e9 | 2560 | ADD_PSYMBOL_TO_LIST (scan, strlen (scan), VAR_NAMESPACE, LOC_CONST, |
2e4964ad FF |
2561 | objfile -> static_psymbols, 0, cu_language, |
2562 | objfile); | |
715cafcb FF |
2563 | scan += strlen (scan) + 1; |
2564 | } | |
2565 | } | |
2566 | } | |
2567 | ||
2568 | /* | |
2569 | ||
35f5886e FF |
2570 | LOCAL FUNCTION |
2571 | ||
2572 | add_partial_symbol -- add symbol to partial symbol table | |
2573 | ||
2574 | DESCRIPTION | |
2575 | ||
2576 | Given a DIE, if it is one of the types that we want to | |
2577 | add to a partial symbol table, finish filling in the die info | |
2578 | and then add a partial symbol table entry for it. | |
2579 | ||
95ff889e FF |
2580 | NOTES |
2581 | ||
2582 | The caller must ensure that the DIE has a valid name attribute. | |
35f5886e FF |
2583 | */ |
2584 | ||
2585 | static void | |
1ab3bf1b JG |
2586 | add_partial_symbol (dip, objfile) |
2587 | struct dieinfo *dip; | |
2588 | struct objfile *objfile; | |
35f5886e | 2589 | { |
13b5a7ff | 2590 | switch (dip -> die_tag) |
35f5886e FF |
2591 | { |
2592 | case TAG_global_subroutine: | |
b440b1e9 | 2593 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2594 | VAR_NAMESPACE, LOC_BLOCK, |
2595 | objfile -> global_psymbols, | |
2e4964ad | 2596 | dip -> at_low_pc, cu_language, objfile); |
35f5886e FF |
2597 | break; |
2598 | case TAG_global_variable: | |
b440b1e9 | 2599 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2600 | VAR_NAMESPACE, LOC_STATIC, |
2601 | objfile -> global_psymbols, | |
2e4964ad | 2602 | 0, cu_language, objfile); |
35f5886e FF |
2603 | break; |
2604 | case TAG_subroutine: | |
b440b1e9 | 2605 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2606 | VAR_NAMESPACE, LOC_BLOCK, |
2607 | objfile -> static_psymbols, | |
2e4964ad | 2608 | dip -> at_low_pc, cu_language, objfile); |
35f5886e FF |
2609 | break; |
2610 | case TAG_local_variable: | |
b440b1e9 | 2611 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2612 | VAR_NAMESPACE, LOC_STATIC, |
2613 | objfile -> static_psymbols, | |
2e4964ad | 2614 | 0, cu_language, objfile); |
35f5886e FF |
2615 | break; |
2616 | case TAG_typedef: | |
b440b1e9 | 2617 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2618 | VAR_NAMESPACE, LOC_TYPEDEF, |
2619 | objfile -> static_psymbols, | |
2e4964ad | 2620 | 0, cu_language, objfile); |
35f5886e | 2621 | break; |
95ff889e | 2622 | case TAG_class_type: |
35f5886e FF |
2623 | case TAG_structure_type: |
2624 | case TAG_union_type: | |
95ff889e | 2625 | case TAG_enumeration_type: |
4386eff2 PS |
2626 | /* Do not add opaque aggregate definitions to the psymtab. */ |
2627 | if (!dip -> has_at_byte_size) | |
2628 | break; | |
b440b1e9 | 2629 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2630 | STRUCT_NAMESPACE, LOC_TYPEDEF, |
2631 | objfile -> static_psymbols, | |
2e4964ad | 2632 | 0, cu_language, objfile); |
95ff889e | 2633 | if (cu_language == language_cplus) |
715cafcb | 2634 | { |
95ff889e | 2635 | /* For C++, these implicitly act as typedefs as well. */ |
b440b1e9 | 2636 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
95ff889e | 2637 | VAR_NAMESPACE, LOC_TYPEDEF, |
1ab3bf1b | 2638 | objfile -> static_psymbols, |
2e4964ad | 2639 | 0, cu_language, objfile); |
715cafcb | 2640 | } |
715cafcb | 2641 | break; |
35f5886e FF |
2642 | } |
2643 | } | |
2644 | ||
2645 | /* | |
2646 | ||
2647 | LOCAL FUNCTION | |
2648 | ||
2649 | scan_partial_symbols -- scan DIE's within a single compilation unit | |
2650 | ||
2651 | DESCRIPTION | |
2652 | ||
2653 | Process the DIE's within a single compilation unit, looking for | |
2654 | interesting DIE's that contribute to the partial symbol table entry | |
a679650f | 2655 | for this compilation unit. |
35f5886e | 2656 | |
2d6186f4 FF |
2657 | NOTES |
2658 | ||
a679650f FF |
2659 | There are some DIE's that may appear both at file scope and within |
2660 | the scope of a function. We are only interested in the ones at file | |
2661 | scope, and the only way to tell them apart is to keep track of the | |
2662 | scope. For example, consider the test case: | |
2663 | ||
2664 | static int i; | |
2665 | main () { int j; } | |
2666 | ||
2667 | for which the relevant DWARF segment has the structure: | |
2668 | ||
2669 | 0x51: | |
2670 | 0x23 global subrtn sibling 0x9b | |
2671 | name main | |
2672 | fund_type FT_integer | |
2673 | low_pc 0x800004cc | |
2674 | high_pc 0x800004d4 | |
2675 | ||
2676 | 0x74: | |
2677 | 0x23 local var sibling 0x97 | |
2678 | name j | |
2679 | fund_type FT_integer | |
2680 | location OP_BASEREG 0xe | |
2681 | OP_CONST 0xfffffffc | |
2682 | OP_ADD | |
2683 | 0x97: | |
2684 | 0x4 | |
2685 | ||
2686 | 0x9b: | |
2687 | 0x1d local var sibling 0xb8 | |
2688 | name i | |
2689 | fund_type FT_integer | |
2690 | location OP_ADDR 0x800025dc | |
2691 | ||
2692 | 0xb8: | |
2693 | 0x4 | |
2694 | ||
2695 | We want to include the symbol 'i' in the partial symbol table, but | |
2696 | not the symbol 'j'. In essence, we want to skip all the dies within | |
2697 | the scope of a TAG_global_subroutine DIE. | |
2698 | ||
715cafcb FF |
2699 | Don't attempt to add anonymous structures or unions since they have |
2700 | no name. Anonymous enumerations however are processed, because we | |
2701 | want to extract their member names (the check for a tag name is | |
2702 | done later). | |
2d6186f4 | 2703 | |
715cafcb FF |
2704 | Also, for variables and subroutines, check that this is the place |
2705 | where the actual definition occurs, rather than just a reference | |
2706 | to an external. | |
35f5886e FF |
2707 | */ |
2708 | ||
2709 | static void | |
1ab3bf1b JG |
2710 | scan_partial_symbols (thisdie, enddie, objfile) |
2711 | char *thisdie; | |
2712 | char *enddie; | |
2713 | struct objfile *objfile; | |
35f5886e FF |
2714 | { |
2715 | char *nextdie; | |
a679650f | 2716 | char *temp; |
35f5886e FF |
2717 | struct dieinfo di; |
2718 | ||
2719 | while (thisdie < enddie) | |
2720 | { | |
95967e73 | 2721 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2722 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2723 | { |
2724 | break; | |
2725 | } | |
2726 | else | |
2727 | { | |
13b5a7ff | 2728 | nextdie = thisdie + di.die_length; |
715cafcb FF |
2729 | /* To avoid getting complete die information for every die, we |
2730 | only do it (below) for the cases we are interested in. */ | |
13b5a7ff | 2731 | switch (di.die_tag) |
35f5886e FF |
2732 | { |
2733 | case TAG_global_subroutine: | |
35f5886e | 2734 | case TAG_subroutine: |
a679650f FF |
2735 | completedieinfo (&di, objfile); |
2736 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2737 | { | |
2738 | add_partial_symbol (&di, objfile); | |
2739 | /* If there is a sibling attribute, adjust the nextdie | |
2740 | pointer to skip the entire scope of the subroutine. | |
2741 | Apply some sanity checking to make sure we don't | |
2742 | overrun or underrun the range of remaining DIE's */ | |
2743 | if (di.at_sibling != 0) | |
2744 | { | |
2745 | temp = dbbase + di.at_sibling - dbroff; | |
2746 | if ((temp < thisdie) || (temp >= enddie)) | |
2747 | { | |
51b80b00 FF |
2748 | complain (&bad_die_ref, DIE_ID, DIE_NAME, |
2749 | di.at_sibling); | |
a679650f FF |
2750 | } |
2751 | else | |
2752 | { | |
2753 | nextdie = temp; | |
2754 | } | |
2755 | } | |
2756 | } | |
2757 | break; | |
2d6186f4 | 2758 | case TAG_global_variable: |
35f5886e | 2759 | case TAG_local_variable: |
95967e73 | 2760 | completedieinfo (&di, objfile); |
2d6186f4 FF |
2761 | if (di.at_name && (di.has_at_low_pc || di.at_location)) |
2762 | { | |
1ab3bf1b | 2763 | add_partial_symbol (&di, objfile); |
2d6186f4 FF |
2764 | } |
2765 | break; | |
35f5886e | 2766 | case TAG_typedef: |
95ff889e | 2767 | case TAG_class_type: |
35f5886e FF |
2768 | case TAG_structure_type: |
2769 | case TAG_union_type: | |
95967e73 | 2770 | completedieinfo (&di, objfile); |
2d6186f4 | 2771 | if (di.at_name) |
35f5886e | 2772 | { |
1ab3bf1b | 2773 | add_partial_symbol (&di, objfile); |
35f5886e FF |
2774 | } |
2775 | break; | |
715cafcb | 2776 | case TAG_enumeration_type: |
95967e73 | 2777 | completedieinfo (&di, objfile); |
95ff889e FF |
2778 | if (di.at_name) |
2779 | { | |
2780 | add_partial_symbol (&di, objfile); | |
2781 | } | |
2782 | add_enum_psymbol (&di, objfile); | |
715cafcb | 2783 | break; |
35f5886e FF |
2784 | } |
2785 | } | |
2786 | thisdie = nextdie; | |
2787 | } | |
2788 | } | |
2789 | ||
2790 | /* | |
2791 | ||
2792 | LOCAL FUNCTION | |
2793 | ||
2794 | scan_compilation_units -- build a psymtab entry for each compilation | |
2795 | ||
2796 | DESCRIPTION | |
2797 | ||
2798 | This is the top level dwarf parsing routine for building partial | |
2799 | symbol tables. | |
2800 | ||
2801 | It scans from the beginning of the DWARF table looking for the first | |
2802 | TAG_compile_unit DIE, and then follows the sibling chain to locate | |
2803 | each additional TAG_compile_unit DIE. | |
2804 | ||
2805 | For each TAG_compile_unit DIE it creates a partial symtab structure, | |
2806 | calls a subordinate routine to collect all the compilation unit's | |
2807 | global DIE's, file scope DIEs, typedef DIEs, etc, and then links the | |
2808 | new partial symtab structure into the partial symbol table. It also | |
2809 | records the appropriate information in the partial symbol table entry | |
2810 | to allow the chunk of DIE's and line number table for this compilation | |
2811 | unit to be located and re-read later, to generate a complete symbol | |
2812 | table entry for the compilation unit. | |
2813 | ||
2814 | Thus it effectively partitions up a chunk of DIE's for multiple | |
2815 | compilation units into smaller DIE chunks and line number tables, | |
2816 | and associates them with a partial symbol table entry. | |
2817 | ||
2818 | NOTES | |
2819 | ||
2820 | If any compilation unit has no line number table associated with | |
2821 | it for some reason (a missing at_stmt_list attribute, rather than | |
2822 | just one with a value of zero, which is valid) then we ensure that | |
2823 | the recorded file offset is zero so that the routine which later | |
2824 | reads line number table fragments knows that there is no fragment | |
2825 | to read. | |
2826 | ||
2827 | RETURNS | |
2828 | ||
2829 | Returns no value. | |
2830 | ||
2831 | */ | |
2832 | ||
2833 | static void | |
d5931d79 | 2834 | scan_compilation_units (thisdie, enddie, dbfoff, lnoffset, objfile) |
1ab3bf1b JG |
2835 | char *thisdie; |
2836 | char *enddie; | |
d5931d79 JG |
2837 | file_ptr dbfoff; |
2838 | file_ptr lnoffset; | |
1ab3bf1b | 2839 | struct objfile *objfile; |
35f5886e FF |
2840 | { |
2841 | char *nextdie; | |
2842 | struct dieinfo di; | |
2843 | struct partial_symtab *pst; | |
2844 | int culength; | |
2845 | int curoff; | |
d5931d79 | 2846 | file_ptr curlnoffset; |
35f5886e FF |
2847 | |
2848 | while (thisdie < enddie) | |
2849 | { | |
95967e73 | 2850 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2851 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2852 | { |
2853 | break; | |
2854 | } | |
13b5a7ff | 2855 | else if (di.die_tag != TAG_compile_unit) |
35f5886e | 2856 | { |
13b5a7ff | 2857 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2858 | } |
2859 | else | |
2860 | { | |
95967e73 | 2861 | completedieinfo (&di, objfile); |
95ff889e | 2862 | set_cu_language (&di); |
35f5886e FF |
2863 | if (di.at_sibling != 0) |
2864 | { | |
2865 | nextdie = dbbase + di.at_sibling - dbroff; | |
2866 | } | |
2867 | else | |
2868 | { | |
13b5a7ff | 2869 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2870 | } |
2871 | curoff = thisdie - dbbase; | |
2872 | culength = nextdie - thisdie; | |
2d6186f4 | 2873 | curlnoffset = di.has_at_stmt_list ? lnoffset + di.at_stmt_list : 0; |
1ab3bf1b JG |
2874 | |
2875 | /* First allocate a new partial symbol table structure */ | |
2876 | ||
95ff889e FF |
2877 | pst = start_psymtab_common (objfile, base_section_offsets, |
2878 | di.at_name, di.at_low_pc, | |
1ab3bf1b JG |
2879 | objfile -> global_psymbols.next, |
2880 | objfile -> static_psymbols.next); | |
2881 | ||
2882 | pst -> texthigh = di.at_high_pc; | |
2883 | pst -> read_symtab_private = (char *) | |
2884 | obstack_alloc (&objfile -> psymbol_obstack, | |
2885 | sizeof (struct dwfinfo)); | |
2886 | DBFOFF (pst) = dbfoff; | |
2887 | DBROFF (pst) = curoff; | |
2888 | DBLENGTH (pst) = culength; | |
2889 | LNFOFF (pst) = curlnoffset; | |
2890 | pst -> read_symtab = dwarf_psymtab_to_symtab; | |
2891 | ||
2892 | /* Now look for partial symbols */ | |
2893 | ||
13b5a7ff | 2894 | scan_partial_symbols (thisdie + di.die_length, nextdie, objfile); |
1ab3bf1b JG |
2895 | |
2896 | pst -> n_global_syms = objfile -> global_psymbols.next - | |
2897 | (objfile -> global_psymbols.list + pst -> globals_offset); | |
2898 | pst -> n_static_syms = objfile -> static_psymbols.next - | |
2899 | (objfile -> static_psymbols.list + pst -> statics_offset); | |
2900 | sort_pst_symbols (pst); | |
35f5886e FF |
2901 | /* If there is already a psymtab or symtab for a file of this name, |
2902 | remove it. (If there is a symtab, more drastic things also | |
2903 | happen.) This happens in VxWorks. */ | |
2904 | free_named_symtabs (pst -> filename); | |
35f5886e FF |
2905 | } |
2906 | thisdie = nextdie; | |
2907 | } | |
2908 | } | |
2909 | ||
2910 | /* | |
2911 | ||
2912 | LOCAL FUNCTION | |
2913 | ||
2914 | new_symbol -- make a symbol table entry for a new symbol | |
2915 | ||
2916 | SYNOPSIS | |
2917 | ||
1ab3bf1b JG |
2918 | static struct symbol *new_symbol (struct dieinfo *dip, |
2919 | struct objfile *objfile) | |
35f5886e FF |
2920 | |
2921 | DESCRIPTION | |
2922 | ||
2923 | Given a pointer to a DWARF information entry, figure out if we need | |
2924 | to make a symbol table entry for it, and if so, create a new entry | |
2925 | and return a pointer to it. | |
2926 | */ | |
2927 | ||
2928 | static struct symbol * | |
1ab3bf1b JG |
2929 | new_symbol (dip, objfile) |
2930 | struct dieinfo *dip; | |
2931 | struct objfile *objfile; | |
35f5886e FF |
2932 | { |
2933 | struct symbol *sym = NULL; | |
2934 | ||
2935 | if (dip -> at_name != NULL) | |
2936 | { | |
1ab3bf1b | 2937 | sym = (struct symbol *) obstack_alloc (&objfile -> symbol_obstack, |
35f5886e | 2938 | sizeof (struct symbol)); |
4ed3a9ea | 2939 | memset (sym, 0, sizeof (struct symbol)); |
95ff889e FF |
2940 | SYMBOL_NAME (sym) = create_name (dip -> at_name, |
2941 | &objfile->symbol_obstack); | |
35f5886e FF |
2942 | /* default assumptions */ |
2943 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2944 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2945 | SYMBOL_TYPE (sym) = decode_die_type (dip); | |
2e4964ad FF |
2946 | |
2947 | /* If this symbol is from a C++ compilation, then attempt to cache the | |
2948 | demangled form for future reference. This is a typical time versus | |
2949 | space tradeoff, that was decided in favor of time because it sped up | |
2950 | C++ symbol lookups by a factor of about 20. */ | |
2951 | ||
2952 | SYMBOL_LANGUAGE (sym) = cu_language; | |
7532cf10 | 2953 | SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile -> symbol_obstack); |
13b5a7ff | 2954 | switch (dip -> die_tag) |
35f5886e FF |
2955 | { |
2956 | case TAG_label: | |
4d315a07 | 2957 | SYMBOL_VALUE (sym) = dip -> at_low_pc; |
35f5886e FF |
2958 | SYMBOL_CLASS (sym) = LOC_LABEL; |
2959 | break; | |
2960 | case TAG_global_subroutine: | |
2961 | case TAG_subroutine: | |
4d315a07 | 2962 | SYMBOL_VALUE (sym) = dip -> at_low_pc; |
35f5886e FF |
2963 | SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym)); |
2964 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
13b5a7ff | 2965 | if (dip -> die_tag == TAG_global_subroutine) |
35f5886e FF |
2966 | { |
2967 | add_symbol_to_list (sym, &global_symbols); | |
2968 | } | |
2969 | else | |
2970 | { | |
4d315a07 | 2971 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2972 | } |
2973 | break; | |
2974 | case TAG_global_variable: | |
35f5886e FF |
2975 | if (dip -> at_location != NULL) |
2976 | { | |
2977 | SYMBOL_VALUE (sym) = locval (dip -> at_location); | |
35f5886e FF |
2978 | add_symbol_to_list (sym, &global_symbols); |
2979 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2980 | SYMBOL_VALUE (sym) += baseaddr; | |
2981 | } | |
a5bd5ba6 FF |
2982 | break; |
2983 | case TAG_local_variable: | |
2984 | if (dip -> at_location != NULL) | |
35f5886e | 2985 | { |
a5bd5ba6 | 2986 | SYMBOL_VALUE (sym) = locval (dip -> at_location); |
4d315a07 | 2987 | add_symbol_to_list (sym, list_in_scope); |
a5bd5ba6 FF |
2988 | if (isreg) |
2989 | { | |
2990 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
2991 | } | |
2992 | else if (offreg) | |
35f5886e | 2993 | { |
a1c8d76e JK |
2994 | SYMBOL_CLASS (sym) = LOC_BASEREG; |
2995 | SYMBOL_BASEREG (sym) = basereg; | |
35f5886e FF |
2996 | } |
2997 | else | |
2998 | { | |
2999 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
3000 | SYMBOL_VALUE (sym) += baseaddr; | |
3001 | } | |
3002 | } | |
3003 | break; | |
3004 | case TAG_formal_parameter: | |
3005 | if (dip -> at_location != NULL) | |
3006 | { | |
3007 | SYMBOL_VALUE (sym) = locval (dip -> at_location); | |
3008 | } | |
4d315a07 | 3009 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
3010 | if (isreg) |
3011 | { | |
3012 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
3013 | } | |
a1c8d76e JK |
3014 | else if (offreg) |
3015 | { | |
3016 | SYMBOL_CLASS (sym) = LOC_BASEREG_ARG; | |
3017 | SYMBOL_BASEREG (sym) = basereg; | |
3018 | } | |
35f5886e FF |
3019 | else |
3020 | { | |
3021 | SYMBOL_CLASS (sym) = LOC_ARG; | |
3022 | } | |
3023 | break; | |
3024 | case TAG_unspecified_parameters: | |
3025 | /* From varargs functions; gdb doesn't seem to have any interest in | |
3026 | this information, so just ignore it for now. (FIXME?) */ | |
3027 | break; | |
95ff889e | 3028 | case TAG_class_type: |
35f5886e FF |
3029 | case TAG_structure_type: |
3030 | case TAG_union_type: | |
3031 | case TAG_enumeration_type: | |
3032 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3033 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
4d315a07 | 3034 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
3035 | break; |
3036 | case TAG_typedef: | |
3037 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3038 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
4d315a07 | 3039 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
3040 | break; |
3041 | default: | |
3042 | /* Not a tag we recognize. Hopefully we aren't processing trash | |
3043 | data, but since we must specifically ignore things we don't | |
3044 | recognize, there is nothing else we should do at this point. */ | |
3045 | break; | |
3046 | } | |
3047 | } | |
3048 | return (sym); | |
3049 | } | |
3050 | ||
3051 | /* | |
3052 | ||
95ff889e FF |
3053 | LOCAL FUNCTION |
3054 | ||
3055 | synthesize_typedef -- make a symbol table entry for a "fake" typedef | |
3056 | ||
3057 | SYNOPSIS | |
3058 | ||
3059 | static void synthesize_typedef (struct dieinfo *dip, | |
3060 | struct objfile *objfile, | |
3061 | struct type *type); | |
3062 | ||
3063 | DESCRIPTION | |
3064 | ||
3065 | Given a pointer to a DWARF information entry, synthesize a typedef | |
3066 | for the name in the DIE, using the specified type. | |
3067 | ||
3068 | This is used for C++ class, structs, unions, and enumerations to | |
3069 | set up the tag name as a type. | |
3070 | ||
3071 | */ | |
3072 | ||
3073 | static void | |
3074 | synthesize_typedef (dip, objfile, type) | |
3075 | struct dieinfo *dip; | |
3076 | struct objfile *objfile; | |
3077 | struct type *type; | |
3078 | { | |
3079 | struct symbol *sym = NULL; | |
3080 | ||
3081 | if (dip -> at_name != NULL) | |
3082 | { | |
3083 | sym = (struct symbol *) | |
3084 | obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symbol)); | |
3085 | memset (sym, 0, sizeof (struct symbol)); | |
3086 | SYMBOL_NAME (sym) = create_name (dip -> at_name, | |
3087 | &objfile->symbol_obstack); | |
7532cf10 | 3088 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); |
95ff889e FF |
3089 | SYMBOL_TYPE (sym) = type; |
3090 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3091 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
3092 | add_symbol_to_list (sym, list_in_scope); | |
3093 | } | |
3094 | } | |
3095 | ||
3096 | /* | |
3097 | ||
35f5886e FF |
3098 | LOCAL FUNCTION |
3099 | ||
3100 | decode_mod_fund_type -- decode a modified fundamental type | |
3101 | ||
3102 | SYNOPSIS | |
3103 | ||
3104 | static struct type *decode_mod_fund_type (char *typedata) | |
3105 | ||
3106 | DESCRIPTION | |
3107 | ||
3108 | Decode a block of data containing a modified fundamental | |
3109 | type specification. TYPEDATA is a pointer to the block, | |
13b5a7ff FF |
3110 | which starts with a length containing the size of the rest |
3111 | of the block. At the end of the block is a fundmental type | |
3112 | code value that gives the fundamental type. Everything | |
35f5886e FF |
3113 | in between are type modifiers. |
3114 | ||
3115 | We simply compute the number of modifiers and call the general | |
3116 | function decode_modified_type to do the actual work. | |
3117 | */ | |
3118 | ||
3119 | static struct type * | |
1ab3bf1b JG |
3120 | decode_mod_fund_type (typedata) |
3121 | char *typedata; | |
35f5886e FF |
3122 | { |
3123 | struct type *typep = NULL; | |
3124 | unsigned short modcount; | |
13b5a7ff | 3125 | int nbytes; |
35f5886e FF |
3126 | |
3127 | /* Get the total size of the block, exclusive of the size itself */ | |
13b5a7ff FF |
3128 | |
3129 | nbytes = attribute_size (AT_mod_fund_type); | |
3130 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3131 | typedata += nbytes; | |
3132 | ||
35f5886e | 3133 | /* Deduct the size of the fundamental type bytes at the end of the block. */ |
13b5a7ff FF |
3134 | |
3135 | modcount -= attribute_size (AT_fund_type); | |
3136 | ||
35f5886e | 3137 | /* Now do the actual decoding */ |
13b5a7ff FF |
3138 | |
3139 | typep = decode_modified_type (typedata, modcount, AT_mod_fund_type); | |
35f5886e FF |
3140 | return (typep); |
3141 | } | |
3142 | ||
3143 | /* | |
3144 | ||
3145 | LOCAL FUNCTION | |
3146 | ||
3147 | decode_mod_u_d_type -- decode a modified user defined type | |
3148 | ||
3149 | SYNOPSIS | |
3150 | ||
3151 | static struct type *decode_mod_u_d_type (char *typedata) | |
3152 | ||
3153 | DESCRIPTION | |
3154 | ||
3155 | Decode a block of data containing a modified user defined | |
3156 | type specification. TYPEDATA is a pointer to the block, | |
3157 | which consists of a two byte length, containing the size | |
3158 | of the rest of the block. At the end of the block is a | |
3159 | four byte value that gives a reference to a user defined type. | |
3160 | Everything in between are type modifiers. | |
3161 | ||
3162 | We simply compute the number of modifiers and call the general | |
3163 | function decode_modified_type to do the actual work. | |
3164 | */ | |
3165 | ||
3166 | static struct type * | |
1ab3bf1b JG |
3167 | decode_mod_u_d_type (typedata) |
3168 | char *typedata; | |
35f5886e FF |
3169 | { |
3170 | struct type *typep = NULL; | |
3171 | unsigned short modcount; | |
13b5a7ff | 3172 | int nbytes; |
35f5886e FF |
3173 | |
3174 | /* Get the total size of the block, exclusive of the size itself */ | |
13b5a7ff FF |
3175 | |
3176 | nbytes = attribute_size (AT_mod_u_d_type); | |
3177 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3178 | typedata += nbytes; | |
3179 | ||
35f5886e | 3180 | /* Deduct the size of the reference type bytes at the end of the block. */ |
13b5a7ff FF |
3181 | |
3182 | modcount -= attribute_size (AT_user_def_type); | |
3183 | ||
35f5886e | 3184 | /* Now do the actual decoding */ |
13b5a7ff FF |
3185 | |
3186 | typep = decode_modified_type (typedata, modcount, AT_mod_u_d_type); | |
35f5886e FF |
3187 | return (typep); |
3188 | } | |
3189 | ||
3190 | /* | |
3191 | ||
3192 | LOCAL FUNCTION | |
3193 | ||
3194 | decode_modified_type -- decode modified user or fundamental type | |
3195 | ||
3196 | SYNOPSIS | |
3197 | ||
1c92ca6f | 3198 | static struct type *decode_modified_type (char *modifiers, |
35f5886e FF |
3199 | unsigned short modcount, int mtype) |
3200 | ||
3201 | DESCRIPTION | |
3202 | ||
3203 | Decode a modified type, either a modified fundamental type or | |
3204 | a modified user defined type. MODIFIERS is a pointer to the | |
3205 | block of bytes that define MODCOUNT modifiers. Immediately | |
3206 | following the last modifier is a short containing the fundamental | |
3207 | type or a long containing the reference to the user defined | |
3208 | type. Which one is determined by MTYPE, which is either | |
3209 | AT_mod_fund_type or AT_mod_u_d_type to indicate what modified | |
3210 | type we are generating. | |
3211 | ||
3212 | We call ourself recursively to generate each modified type,` | |
3213 | until MODCOUNT reaches zero, at which point we have consumed | |
3214 | all the modifiers and generate either the fundamental type or | |
3215 | user defined type. When the recursion unwinds, each modifier | |
3216 | is applied in turn to generate the full modified type. | |
3217 | ||
3218 | NOTES | |
3219 | ||
3220 | If we find a modifier that we don't recognize, and it is not one | |
3221 | of those reserved for application specific use, then we issue a | |
3222 | warning and simply ignore the modifier. | |
3223 | ||
3224 | BUGS | |
3225 | ||
3226 | We currently ignore MOD_const and MOD_volatile. (FIXME) | |
3227 | ||
3228 | */ | |
3229 | ||
3230 | static struct type * | |
1ab3bf1b | 3231 | decode_modified_type (modifiers, modcount, mtype) |
1c92ca6f | 3232 | char *modifiers; |
1ab3bf1b JG |
3233 | unsigned int modcount; |
3234 | int mtype; | |
35f5886e FF |
3235 | { |
3236 | struct type *typep = NULL; | |
3237 | unsigned short fundtype; | |
13b5a7ff | 3238 | DIE_REF die_ref; |
1c92ca6f | 3239 | char modifier; |
13b5a7ff | 3240 | int nbytes; |
35f5886e FF |
3241 | |
3242 | if (modcount == 0) | |
3243 | { | |
3244 | switch (mtype) | |
3245 | { | |
3246 | case AT_mod_fund_type: | |
13b5a7ff FF |
3247 | nbytes = attribute_size (AT_fund_type); |
3248 | fundtype = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3249 | current_objfile); | |
35f5886e FF |
3250 | typep = decode_fund_type (fundtype); |
3251 | break; | |
3252 | case AT_mod_u_d_type: | |
13b5a7ff FF |
3253 | nbytes = attribute_size (AT_user_def_type); |
3254 | die_ref = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3255 | current_objfile); | |
3256 | if ((typep = lookup_utype (die_ref)) == NULL) | |
35f5886e | 3257 | { |
13b5a7ff | 3258 | typep = alloc_utype (die_ref, NULL); |
35f5886e FF |
3259 | } |
3260 | break; | |
3261 | default: | |
51b80b00 | 3262 | complain (&botched_modified_type, DIE_ID, DIE_NAME, mtype); |
bf229b4e | 3263 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
35f5886e FF |
3264 | break; |
3265 | } | |
3266 | } | |
3267 | else | |
3268 | { | |
3269 | modifier = *modifiers++; | |
3270 | typep = decode_modified_type (modifiers, --modcount, mtype); | |
3271 | switch (modifier) | |
3272 | { | |
13b5a7ff FF |
3273 | case MOD_pointer_to: |
3274 | typep = lookup_pointer_type (typep); | |
3275 | break; | |
3276 | case MOD_reference_to: | |
3277 | typep = lookup_reference_type (typep); | |
3278 | break; | |
3279 | case MOD_const: | |
51b80b00 | 3280 | complain (&const_ignored, DIE_ID, DIE_NAME); /* FIXME */ |
13b5a7ff FF |
3281 | break; |
3282 | case MOD_volatile: | |
51b80b00 | 3283 | complain (&volatile_ignored, DIE_ID, DIE_NAME); /* FIXME */ |
13b5a7ff FF |
3284 | break; |
3285 | default: | |
1c92ca6f FF |
3286 | if (!(MOD_lo_user <= (unsigned char) modifier |
3287 | && (unsigned char) modifier <= MOD_hi_user)) | |
13b5a7ff | 3288 | { |
51b80b00 | 3289 | complain (&unknown_type_modifier, DIE_ID, DIE_NAME, modifier); |
13b5a7ff FF |
3290 | } |
3291 | break; | |
35f5886e FF |
3292 | } |
3293 | } | |
3294 | return (typep); | |
3295 | } | |
3296 | ||
3297 | /* | |
3298 | ||
3299 | LOCAL FUNCTION | |
3300 | ||
3301 | decode_fund_type -- translate basic DWARF type to gdb base type | |
3302 | ||
3303 | DESCRIPTION | |
3304 | ||
3305 | Given an integer that is one of the fundamental DWARF types, | |
3306 | translate it to one of the basic internal gdb types and return | |
3307 | a pointer to the appropriate gdb type (a "struct type *"). | |
3308 | ||
3309 | NOTES | |
3310 | ||
85f0a848 FF |
3311 | For robustness, if we are asked to translate a fundamental |
3312 | type that we are unprepared to deal with, we return int so | |
3313 | callers can always depend upon a valid type being returned, | |
3314 | and so gdb may at least do something reasonable by default. | |
3315 | If the type is not in the range of those types defined as | |
3316 | application specific types, we also issue a warning. | |
35f5886e FF |
3317 | */ |
3318 | ||
3319 | static struct type * | |
1ab3bf1b JG |
3320 | decode_fund_type (fundtype) |
3321 | unsigned int fundtype; | |
35f5886e FF |
3322 | { |
3323 | struct type *typep = NULL; | |
3324 | ||
3325 | switch (fundtype) | |
3326 | { | |
3327 | ||
3328 | case FT_void: | |
bf229b4e | 3329 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); |
35f5886e FF |
3330 | break; |
3331 | ||
1ab3bf1b | 3332 | case FT_boolean: /* Was FT_set in AT&T version */ |
bf229b4e | 3333 | typep = dwarf_fundamental_type (current_objfile, FT_BOOLEAN); |
1ab3bf1b JG |
3334 | break; |
3335 | ||
35f5886e | 3336 | case FT_pointer: /* (void *) */ |
bf229b4e | 3337 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); |
1ab3bf1b | 3338 | typep = lookup_pointer_type (typep); |
35f5886e FF |
3339 | break; |
3340 | ||
3341 | case FT_char: | |
bf229b4e | 3342 | typep = dwarf_fundamental_type (current_objfile, FT_CHAR); |
1ab3bf1b JG |
3343 | break; |
3344 | ||
35f5886e | 3345 | case FT_signed_char: |
bf229b4e | 3346 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_CHAR); |
1ab3bf1b JG |
3347 | break; |
3348 | ||
3349 | case FT_unsigned_char: | |
bf229b4e | 3350 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); |
35f5886e FF |
3351 | break; |
3352 | ||
3353 | case FT_short: | |
bf229b4e | 3354 | typep = dwarf_fundamental_type (current_objfile, FT_SHORT); |
1ab3bf1b JG |
3355 | break; |
3356 | ||
35f5886e | 3357 | case FT_signed_short: |
bf229b4e | 3358 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_SHORT); |
1ab3bf1b JG |
3359 | break; |
3360 | ||
3361 | case FT_unsigned_short: | |
bf229b4e | 3362 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); |
35f5886e FF |
3363 | break; |
3364 | ||
3365 | case FT_integer: | |
bf229b4e | 3366 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1ab3bf1b JG |
3367 | break; |
3368 | ||
35f5886e | 3369 | case FT_signed_integer: |
bf229b4e | 3370 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_INTEGER); |
1ab3bf1b JG |
3371 | break; |
3372 | ||
3373 | case FT_unsigned_integer: | |
bf229b4e | 3374 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); |
35f5886e FF |
3375 | break; |
3376 | ||
3377 | case FT_long: | |
bf229b4e | 3378 | typep = dwarf_fundamental_type (current_objfile, FT_LONG); |
1ab3bf1b JG |
3379 | break; |
3380 | ||
35f5886e | 3381 | case FT_signed_long: |
bf229b4e | 3382 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG); |
35f5886e FF |
3383 | break; |
3384 | ||
1ab3bf1b | 3385 | case FT_unsigned_long: |
bf229b4e | 3386 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG); |
35f5886e FF |
3387 | break; |
3388 | ||
1ab3bf1b | 3389 | case FT_long_long: |
bf229b4e | 3390 | typep = dwarf_fundamental_type (current_objfile, FT_LONG_LONG); |
35f5886e | 3391 | break; |
1ab3bf1b JG |
3392 | |
3393 | case FT_signed_long_long: | |
bf229b4e | 3394 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG_LONG); |
35f5886e | 3395 | break; |
1ab3bf1b JG |
3396 | |
3397 | case FT_unsigned_long_long: | |
bf229b4e | 3398 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); |
35f5886e | 3399 | break; |
1ab3bf1b JG |
3400 | |
3401 | case FT_float: | |
bf229b4e | 3402 | typep = dwarf_fundamental_type (current_objfile, FT_FLOAT); |
35f5886e FF |
3403 | break; |
3404 | ||
1ab3bf1b | 3405 | case FT_dbl_prec_float: |
bf229b4e | 3406 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); |
35f5886e FF |
3407 | break; |
3408 | ||
3409 | case FT_ext_prec_float: | |
bf229b4e | 3410 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); |
35f5886e FF |
3411 | break; |
3412 | ||
3413 | case FT_complex: | |
bf229b4e | 3414 | typep = dwarf_fundamental_type (current_objfile, FT_COMPLEX); |
35f5886e FF |
3415 | break; |
3416 | ||
3417 | case FT_dbl_prec_complex: | |
bf229b4e | 3418 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_COMPLEX); |
35f5886e FF |
3419 | break; |
3420 | ||
1ab3bf1b | 3421 | case FT_ext_prec_complex: |
bf229b4e | 3422 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_COMPLEX); |
35f5886e | 3423 | break; |
1ab3bf1b | 3424 | |
35f5886e FF |
3425 | } |
3426 | ||
85f0a848 | 3427 | if (typep == NULL) |
35f5886e | 3428 | { |
85f0a848 FF |
3429 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
3430 | if (!(FT_lo_user <= fundtype && fundtype <= FT_hi_user)) | |
3431 | { | |
51b80b00 | 3432 | complain (&unexpected_fund_type, DIE_ID, DIE_NAME, fundtype); |
85f0a848 | 3433 | } |
35f5886e FF |
3434 | } |
3435 | ||
3436 | return (typep); | |
3437 | } | |
3438 | ||
3439 | /* | |
3440 | ||
3441 | LOCAL FUNCTION | |
3442 | ||
3443 | create_name -- allocate a fresh copy of a string on an obstack | |
3444 | ||
3445 | DESCRIPTION | |
3446 | ||
3447 | Given a pointer to a string and a pointer to an obstack, allocates | |
3448 | a fresh copy of the string on the specified obstack. | |
3449 | ||
3450 | */ | |
3451 | ||
3452 | static char * | |
1ab3bf1b JG |
3453 | create_name (name, obstackp) |
3454 | char *name; | |
3455 | struct obstack *obstackp; | |
35f5886e FF |
3456 | { |
3457 | int length; | |
3458 | char *newname; | |
3459 | ||
3460 | length = strlen (name) + 1; | |
3461 | newname = (char *) obstack_alloc (obstackp, length); | |
4ed3a9ea | 3462 | strcpy (newname, name); |
35f5886e FF |
3463 | return (newname); |
3464 | } | |
3465 | ||
3466 | /* | |
3467 | ||
3468 | LOCAL FUNCTION | |
3469 | ||
3470 | basicdieinfo -- extract the minimal die info from raw die data | |
3471 | ||
3472 | SYNOPSIS | |
3473 | ||
95967e73 FF |
3474 | void basicdieinfo (char *diep, struct dieinfo *dip, |
3475 | struct objfile *objfile) | |
35f5886e FF |
3476 | |
3477 | DESCRIPTION | |
3478 | ||
3479 | Given a pointer to raw DIE data, and a pointer to an instance of a | |
3480 | die info structure, this function extracts the basic information | |
3481 | from the DIE data required to continue processing this DIE, along | |
3482 | with some bookkeeping information about the DIE. | |
3483 | ||
3484 | The information we absolutely must have includes the DIE tag, | |
3485 | and the DIE length. If we need the sibling reference, then we | |
3486 | will have to call completedieinfo() to process all the remaining | |
3487 | DIE information. | |
3488 | ||
3489 | Note that since there is no guarantee that the data is properly | |
3490 | aligned in memory for the type of access required (indirection | |
95967e73 FF |
3491 | through anything other than a char pointer), and there is no |
3492 | guarantee that it is in the same byte order as the gdb host, | |
3493 | we call a function which deals with both alignment and byte | |
3494 | swapping issues. Possibly inefficient, but quite portable. | |
35f5886e FF |
3495 | |
3496 | We also take care of some other basic things at this point, such | |
3497 | as ensuring that the instance of the die info structure starts | |
3498 | out completely zero'd and that curdie is initialized for use | |
3499 | in error reporting if we have a problem with the current die. | |
3500 | ||
3501 | NOTES | |
3502 | ||
3503 | All DIE's must have at least a valid length, thus the minimum | |
13b5a7ff FF |
3504 | DIE size is SIZEOF_DIE_LENGTH. In order to have a valid tag, the |
3505 | DIE size must be at least SIZEOF_DIE_TAG larger, otherwise they | |
35f5886e FF |
3506 | are forced to be TAG_padding DIES. |
3507 | ||
13b5a7ff FF |
3508 | Padding DIES must be at least SIZEOF_DIE_LENGTH in length, implying |
3509 | that if a padding DIE is used for alignment and the amount needed is | |
3510 | less than SIZEOF_DIE_LENGTH, then the padding DIE has to be big | |
3511 | enough to align to the next alignment boundry. | |
4090fe1c FF |
3512 | |
3513 | We do some basic sanity checking here, such as verifying that the | |
3514 | length of the die would not cause it to overrun the recorded end of | |
3515 | the buffer holding the DIE info. If we find a DIE that is either | |
3516 | too small or too large, we force it's length to zero which should | |
3517 | cause the caller to take appropriate action. | |
35f5886e FF |
3518 | */ |
3519 | ||
3520 | static void | |
95967e73 | 3521 | basicdieinfo (dip, diep, objfile) |
1ab3bf1b JG |
3522 | struct dieinfo *dip; |
3523 | char *diep; | |
95967e73 | 3524 | struct objfile *objfile; |
35f5886e FF |
3525 | { |
3526 | curdie = dip; | |
4ed3a9ea | 3527 | memset (dip, 0, sizeof (struct dieinfo)); |
35f5886e | 3528 | dip -> die = diep; |
13b5a7ff FF |
3529 | dip -> die_ref = dbroff + (diep - dbbase); |
3530 | dip -> die_length = target_to_host (diep, SIZEOF_DIE_LENGTH, GET_UNSIGNED, | |
3531 | objfile); | |
4090fe1c FF |
3532 | if ((dip -> die_length < SIZEOF_DIE_LENGTH) || |
3533 | ((diep + dip -> die_length) > (dbbase + dbsize))) | |
35f5886e | 3534 | { |
51b80b00 | 3535 | complain (&malformed_die, DIE_ID, DIE_NAME, dip -> die_length); |
4090fe1c | 3536 | dip -> die_length = 0; |
35f5886e | 3537 | } |
13b5a7ff | 3538 | else if (dip -> die_length < (SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG)) |
35f5886e | 3539 | { |
13b5a7ff | 3540 | dip -> die_tag = TAG_padding; |
35f5886e FF |
3541 | } |
3542 | else | |
3543 | { | |
13b5a7ff FF |
3544 | diep += SIZEOF_DIE_LENGTH; |
3545 | dip -> die_tag = target_to_host (diep, SIZEOF_DIE_TAG, GET_UNSIGNED, | |
3546 | objfile); | |
35f5886e FF |
3547 | } |
3548 | } | |
3549 | ||
3550 | /* | |
3551 | ||
3552 | LOCAL FUNCTION | |
3553 | ||
3554 | completedieinfo -- finish reading the information for a given DIE | |
3555 | ||
3556 | SYNOPSIS | |
3557 | ||
95967e73 | 3558 | void completedieinfo (struct dieinfo *dip, struct objfile *objfile) |
35f5886e FF |
3559 | |
3560 | DESCRIPTION | |
3561 | ||
3562 | Given a pointer to an already partially initialized die info structure, | |
3563 | scan the raw DIE data and finish filling in the die info structure | |
3564 | from the various attributes found. | |
3565 | ||
3566 | Note that since there is no guarantee that the data is properly | |
3567 | aligned in memory for the type of access required (indirection | |
95967e73 FF |
3568 | through anything other than a char pointer), and there is no |
3569 | guarantee that it is in the same byte order as the gdb host, | |
3570 | we call a function which deals with both alignment and byte | |
3571 | swapping issues. Possibly inefficient, but quite portable. | |
35f5886e FF |
3572 | |
3573 | NOTES | |
3574 | ||
3575 | Each time we are called, we increment the diecount variable, which | |
3576 | keeps an approximate count of the number of dies processed for | |
3577 | each compilation unit. This information is presented to the user | |
3578 | if the info_verbose flag is set. | |
3579 | ||
3580 | */ | |
3581 | ||
3582 | static void | |
95967e73 | 3583 | completedieinfo (dip, objfile) |
1ab3bf1b | 3584 | struct dieinfo *dip; |
95967e73 | 3585 | struct objfile *objfile; |
35f5886e FF |
3586 | { |
3587 | char *diep; /* Current pointer into raw DIE data */ | |
3588 | char *end; /* Terminate DIE scan here */ | |
3589 | unsigned short attr; /* Current attribute being scanned */ | |
3590 | unsigned short form; /* Form of the attribute */ | |
13b5a7ff | 3591 | int nbytes; /* Size of next field to read */ |
35f5886e FF |
3592 | |
3593 | diecount++; | |
3594 | diep = dip -> die; | |
13b5a7ff FF |
3595 | end = diep + dip -> die_length; |
3596 | diep += SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG; | |
35f5886e FF |
3597 | while (diep < end) |
3598 | { | |
13b5a7ff FF |
3599 | attr = target_to_host (diep, SIZEOF_ATTRIBUTE, GET_UNSIGNED, objfile); |
3600 | diep += SIZEOF_ATTRIBUTE; | |
3601 | if ((nbytes = attribute_size (attr)) == -1) | |
3602 | { | |
51b80b00 | 3603 | complain (&unknown_attribute_length, DIE_ID, DIE_NAME); |
13b5a7ff FF |
3604 | diep = end; |
3605 | continue; | |
3606 | } | |
35f5886e FF |
3607 | switch (attr) |
3608 | { | |
3609 | case AT_fund_type: | |
13b5a7ff FF |
3610 | dip -> at_fund_type = target_to_host (diep, nbytes, GET_UNSIGNED, |
3611 | objfile); | |
35f5886e FF |
3612 | break; |
3613 | case AT_ordering: | |
13b5a7ff FF |
3614 | dip -> at_ordering = target_to_host (diep, nbytes, GET_UNSIGNED, |
3615 | objfile); | |
35f5886e FF |
3616 | break; |
3617 | case AT_bit_offset: | |
13b5a7ff FF |
3618 | dip -> at_bit_offset = target_to_host (diep, nbytes, GET_UNSIGNED, |
3619 | objfile); | |
35f5886e | 3620 | break; |
35f5886e | 3621 | case AT_sibling: |
13b5a7ff FF |
3622 | dip -> at_sibling = target_to_host (diep, nbytes, GET_UNSIGNED, |
3623 | objfile); | |
35f5886e FF |
3624 | break; |
3625 | case AT_stmt_list: | |
13b5a7ff FF |
3626 | dip -> at_stmt_list = target_to_host (diep, nbytes, GET_UNSIGNED, |
3627 | objfile); | |
2d6186f4 | 3628 | dip -> has_at_stmt_list = 1; |
35f5886e FF |
3629 | break; |
3630 | case AT_low_pc: | |
13b5a7ff FF |
3631 | dip -> at_low_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3632 | objfile); | |
4d315a07 | 3633 | dip -> at_low_pc += baseaddr; |
2d6186f4 | 3634 | dip -> has_at_low_pc = 1; |
35f5886e FF |
3635 | break; |
3636 | case AT_high_pc: | |
13b5a7ff FF |
3637 | dip -> at_high_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3638 | objfile); | |
4d315a07 | 3639 | dip -> at_high_pc += baseaddr; |
35f5886e FF |
3640 | break; |
3641 | case AT_language: | |
13b5a7ff FF |
3642 | dip -> at_language = target_to_host (diep, nbytes, GET_UNSIGNED, |
3643 | objfile); | |
35f5886e FF |
3644 | break; |
3645 | case AT_user_def_type: | |
13b5a7ff FF |
3646 | dip -> at_user_def_type = target_to_host (diep, nbytes, |
3647 | GET_UNSIGNED, objfile); | |
35f5886e FF |
3648 | break; |
3649 | case AT_byte_size: | |
13b5a7ff FF |
3650 | dip -> at_byte_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3651 | objfile); | |
50055e94 | 3652 | dip -> has_at_byte_size = 1; |
35f5886e FF |
3653 | break; |
3654 | case AT_bit_size: | |
13b5a7ff FF |
3655 | dip -> at_bit_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3656 | objfile); | |
35f5886e FF |
3657 | break; |
3658 | case AT_member: | |
13b5a7ff FF |
3659 | dip -> at_member = target_to_host (diep, nbytes, GET_UNSIGNED, |
3660 | objfile); | |
35f5886e FF |
3661 | break; |
3662 | case AT_discr: | |
13b5a7ff FF |
3663 | dip -> at_discr = target_to_host (diep, nbytes, GET_UNSIGNED, |
3664 | objfile); | |
35f5886e | 3665 | break; |
35f5886e FF |
3666 | case AT_location: |
3667 | dip -> at_location = diep; | |
3668 | break; | |
3669 | case AT_mod_fund_type: | |
3670 | dip -> at_mod_fund_type = diep; | |
3671 | break; | |
3672 | case AT_subscr_data: | |
3673 | dip -> at_subscr_data = diep; | |
3674 | break; | |
3675 | case AT_mod_u_d_type: | |
3676 | dip -> at_mod_u_d_type = diep; | |
3677 | break; | |
35f5886e FF |
3678 | case AT_element_list: |
3679 | dip -> at_element_list = diep; | |
768be6e1 FF |
3680 | dip -> short_element_list = 0; |
3681 | break; | |
3682 | case AT_short_element_list: | |
3683 | dip -> at_element_list = diep; | |
3684 | dip -> short_element_list = 1; | |
35f5886e FF |
3685 | break; |
3686 | case AT_discr_value: | |
3687 | dip -> at_discr_value = diep; | |
3688 | break; | |
3689 | case AT_string_length: | |
3690 | dip -> at_string_length = diep; | |
3691 | break; | |
3692 | case AT_name: | |
3693 | dip -> at_name = diep; | |
3694 | break; | |
3695 | case AT_comp_dir: | |
d4902ab0 FF |
3696 | /* For now, ignore any "hostname:" portion, since gdb doesn't |
3697 | know how to deal with it. (FIXME). */ | |
3698 | dip -> at_comp_dir = strrchr (diep, ':'); | |
3699 | if (dip -> at_comp_dir != NULL) | |
3700 | { | |
3701 | dip -> at_comp_dir++; | |
3702 | } | |
3703 | else | |
3704 | { | |
3705 | dip -> at_comp_dir = diep; | |
3706 | } | |
35f5886e FF |
3707 | break; |
3708 | case AT_producer: | |
3709 | dip -> at_producer = diep; | |
3710 | break; | |
35f5886e | 3711 | case AT_start_scope: |
13b5a7ff FF |
3712 | dip -> at_start_scope = target_to_host (diep, nbytes, GET_UNSIGNED, |
3713 | objfile); | |
35f5886e FF |
3714 | break; |
3715 | case AT_stride_size: | |
13b5a7ff FF |
3716 | dip -> at_stride_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3717 | objfile); | |
35f5886e FF |
3718 | break; |
3719 | case AT_src_info: | |
13b5a7ff FF |
3720 | dip -> at_src_info = target_to_host (diep, nbytes, GET_UNSIGNED, |
3721 | objfile); | |
35f5886e FF |
3722 | break; |
3723 | case AT_prototyped: | |
13b5a7ff | 3724 | dip -> at_prototyped = diep; |
35f5886e | 3725 | break; |
35f5886e FF |
3726 | default: |
3727 | /* Found an attribute that we are unprepared to handle. However | |
3728 | it is specifically one of the design goals of DWARF that | |
3729 | consumers should ignore unknown attributes. As long as the | |
3730 | form is one that we recognize (so we know how to skip it), | |
3731 | we can just ignore the unknown attribute. */ | |
3732 | break; | |
3733 | } | |
13b5a7ff | 3734 | form = FORM_FROM_ATTR (attr); |
35f5886e FF |
3735 | switch (form) |
3736 | { | |
3737 | case FORM_DATA2: | |
13b5a7ff | 3738 | diep += 2; |
35f5886e FF |
3739 | break; |
3740 | case FORM_DATA4: | |
13b5a7ff FF |
3741 | case FORM_REF: |
3742 | diep += 4; | |
35f5886e FF |
3743 | break; |
3744 | case FORM_DATA8: | |
13b5a7ff | 3745 | diep += 8; |
35f5886e FF |
3746 | break; |
3747 | case FORM_ADDR: | |
13b5a7ff | 3748 | diep += TARGET_FT_POINTER_SIZE (objfile); |
35f5886e FF |
3749 | break; |
3750 | case FORM_BLOCK2: | |
13b5a7ff | 3751 | diep += 2 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); |
35f5886e FF |
3752 | break; |
3753 | case FORM_BLOCK4: | |
13b5a7ff | 3754 | diep += 4 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); |
35f5886e FF |
3755 | break; |
3756 | case FORM_STRING: | |
3757 | diep += strlen (diep) + 1; | |
3758 | break; | |
3759 | default: | |
51b80b00 | 3760 | complain (&unknown_attribute_form, DIE_ID, DIE_NAME, form); |
35f5886e FF |
3761 | diep = end; |
3762 | break; | |
3763 | } | |
3764 | } | |
3765 | } | |
95967e73 | 3766 | |
13b5a7ff | 3767 | /* |
95967e73 | 3768 | |
13b5a7ff FF |
3769 | LOCAL FUNCTION |
3770 | ||
3771 | target_to_host -- swap in target data to host | |
3772 | ||
3773 | SYNOPSIS | |
3774 | ||
3775 | target_to_host (char *from, int nbytes, int signextend, | |
3776 | struct objfile *objfile) | |
3777 | ||
3778 | DESCRIPTION | |
3779 | ||
3780 | Given pointer to data in target format in FROM, a byte count for | |
3781 | the size of the data in NBYTES, a flag indicating whether or not | |
3782 | the data is signed in SIGNEXTEND, and a pointer to the current | |
3783 | objfile in OBJFILE, convert the data to host format and return | |
3784 | the converted value. | |
3785 | ||
3786 | NOTES | |
3787 | ||
3788 | FIXME: If we read data that is known to be signed, and expect to | |
3789 | use it as signed data, then we need to explicitly sign extend the | |
3790 | result until the bfd library is able to do this for us. | |
3791 | ||
3792 | */ | |
3793 | ||
3794 | static unsigned long | |
3795 | target_to_host (from, nbytes, signextend, objfile) | |
95967e73 FF |
3796 | char *from; |
3797 | int nbytes; | |
13b5a7ff | 3798 | int signextend; /* FIXME: Unused */ |
95967e73 FF |
3799 | struct objfile *objfile; |
3800 | { | |
13b5a7ff | 3801 | unsigned long rtnval; |
95967e73 FF |
3802 | |
3803 | switch (nbytes) | |
3804 | { | |
95967e73 | 3805 | case 8: |
13b5a7ff | 3806 | rtnval = bfd_get_64 (objfile -> obfd, (bfd_byte *) from); |
95967e73 | 3807 | break; |
95967e73 | 3808 | case 4: |
13b5a7ff | 3809 | rtnval = bfd_get_32 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3810 | break; |
3811 | case 2: | |
13b5a7ff | 3812 | rtnval = bfd_get_16 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3813 | break; |
3814 | case 1: | |
13b5a7ff | 3815 | rtnval = bfd_get_8 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3816 | break; |
3817 | default: | |
51b80b00 | 3818 | complain (&no_bfd_get_N, DIE_ID, DIE_NAME, nbytes); |
13b5a7ff | 3819 | rtnval = 0; |
95967e73 FF |
3820 | break; |
3821 | } | |
13b5a7ff | 3822 | return (rtnval); |
95967e73 FF |
3823 | } |
3824 | ||
13b5a7ff FF |
3825 | /* |
3826 | ||
3827 | LOCAL FUNCTION | |
3828 | ||
3829 | attribute_size -- compute size of data for a DWARF attribute | |
3830 | ||
3831 | SYNOPSIS | |
3832 | ||
3833 | static int attribute_size (unsigned int attr) | |
3834 | ||
3835 | DESCRIPTION | |
3836 | ||
3837 | Given a DWARF attribute in ATTR, compute the size of the first | |
3838 | piece of data associated with this attribute and return that | |
3839 | size. | |
3840 | ||
3841 | Returns -1 for unrecognized attributes. | |
3842 | ||
3843 | */ | |
3844 | ||
3845 | static int | |
3846 | attribute_size (attr) | |
3847 | unsigned int attr; | |
3848 | { | |
3849 | int nbytes; /* Size of next data for this attribute */ | |
3850 | unsigned short form; /* Form of the attribute */ | |
3851 | ||
3852 | form = FORM_FROM_ATTR (attr); | |
3853 | switch (form) | |
3854 | { | |
3855 | case FORM_STRING: /* A variable length field is next */ | |
3856 | nbytes = 0; | |
3857 | break; | |
3858 | case FORM_DATA2: /* Next 2 byte field is the data itself */ | |
3859 | case FORM_BLOCK2: /* Next 2 byte field is a block length */ | |
3860 | nbytes = 2; | |
3861 | break; | |
3862 | case FORM_DATA4: /* Next 4 byte field is the data itself */ | |
3863 | case FORM_BLOCK4: /* Next 4 byte field is a block length */ | |
3864 | case FORM_REF: /* Next 4 byte field is a DIE offset */ | |
3865 | nbytes = 4; | |
3866 | break; | |
3867 | case FORM_DATA8: /* Next 8 byte field is the data itself */ | |
3868 | nbytes = 8; | |
3869 | break; | |
3870 | case FORM_ADDR: /* Next field size is target sizeof(void *) */ | |
3871 | nbytes = TARGET_FT_POINTER_SIZE (objfile); | |
3872 | break; | |
3873 | default: | |
51b80b00 | 3874 | complain (&unknown_attribute_form, DIE_ID, DIE_NAME, form); |
13b5a7ff FF |
3875 | nbytes = -1; |
3876 | break; | |
3877 | } | |
3878 | return (nbytes); | |
3879 | } |