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 | 42 | #include "symtab.h" |
1ab3bf1b | 43 | #include "gdbtypes.h" |
35f5886e | 44 | #include "symfile.h" |
5e2e79f8 | 45 | #include "objfiles.h" |
f5f0679a | 46 | #include "elf/dwarf.h" |
4d315a07 | 47 | #include "buildsym.h" |
2dbde378 | 48 | #include "demangle.h" |
bf229b4e FF |
49 | #include "expression.h" /* Needed for enum exp_opcode in language.h, sigh... */ |
50 | #include "language.h" | |
51b80b00 | 51 | #include "complaints.h" |
35f5886e | 52 | |
d5931d79 JG |
53 | #include <fcntl.h> |
54 | #include <string.h> | |
51b80b00 | 55 | |
d5931d79 JG |
56 | #ifndef NO_SYS_FILE |
57 | #include <sys/file.h> | |
58 | #endif | |
59 | ||
60 | /* FIXME -- convert this to SEEK_SET a la POSIX, move to config files. */ | |
61 | #ifndef L_SET | |
62 | #define L_SET 0 | |
63 | #endif | |
64 | ||
51b80b00 FF |
65 | /* Some macros to provide DIE info for complaints. */ |
66 | ||
67 | #define DIE_ID (curdie!=NULL ? curdie->die_ref : 0) | |
68 | #define DIE_NAME (curdie!=NULL && curdie->at_name!=NULL) ? curdie->at_name : "" | |
69 | ||
70 | /* Complaints that can be issued during DWARF debug info reading. */ | |
71 | ||
72 | struct complaint no_bfd_get_N = | |
73 | { | |
74 | "DIE @ 0x%x \"%s\", no bfd support for %d byte data object", 0, 0 | |
75 | }; | |
76 | ||
77 | struct complaint malformed_die = | |
78 | { | |
79 | "DIE @ 0x%x \"%s\", malformed DIE, bad length (%d bytes)", 0, 0 | |
80 | }; | |
81 | ||
82 | struct complaint bad_die_ref = | |
83 | { | |
84 | "DIE @ 0x%x \"%s\", reference to DIE (0x%x) outside compilation unit", 0, 0 | |
85 | }; | |
86 | ||
87 | struct complaint unknown_attribute_form = | |
88 | { | |
89 | "DIE @ 0x%x \"%s\", unknown attribute form (0x%x)", 0, 0 | |
90 | }; | |
91 | ||
92 | struct complaint unknown_attribute_length = | |
93 | { | |
94 | "DIE @ 0x%x \"%s\", unknown attribute length, skipped remaining attributes", 0, 0 | |
95 | }; | |
96 | ||
97 | struct complaint unexpected_fund_type = | |
98 | { | |
99 | "DIE @ 0x%x \"%s\", unexpected fundamental type 0x%x", 0, 0 | |
100 | }; | |
101 | ||
102 | struct complaint unknown_type_modifier = | |
103 | { | |
104 | "DIE @ 0x%x \"%s\", unknown type modifier %u", 0, 0 | |
105 | }; | |
106 | ||
107 | struct complaint volatile_ignored = | |
108 | { | |
109 | "DIE @ 0x%x \"%s\", type modifier 'volatile' ignored", 0, 0 | |
110 | }; | |
111 | ||
112 | struct complaint const_ignored = | |
113 | { | |
114 | "DIE @ 0x%x \"%s\", type modifier 'const' ignored", 0, 0 | |
115 | }; | |
116 | ||
117 | struct complaint botched_modified_type = | |
118 | { | |
119 | "DIE @ 0x%x \"%s\", botched modified type decoding (mtype 0x%x)", 0, 0 | |
120 | }; | |
121 | ||
122 | struct complaint op_deref2 = | |
123 | { | |
124 | "DIE @ 0x%x \"%s\", OP_DEREF2 address 0x%x not handled", 0, 0 | |
125 | }; | |
126 | ||
127 | struct complaint op_deref4 = | |
128 | { | |
129 | "DIE @ 0x%x \"%s\", OP_DEREF4 address 0x%x not handled", 0, 0 | |
130 | }; | |
131 | ||
132 | struct complaint basereg_not_handled = | |
133 | { | |
134 | "DIE @ 0x%x \"%s\", BASEREG %d not handled", 0, 0 | |
135 | }; | |
136 | ||
137 | struct complaint dup_user_type_allocation = | |
138 | { | |
139 | "DIE @ 0x%x \"%s\", internal error: duplicate user type allocation", 0, 0 | |
140 | }; | |
141 | ||
142 | struct complaint dup_user_type_definition = | |
143 | { | |
144 | "DIE @ 0x%x \"%s\", internal error: duplicate user type definition", 0, 0 | |
145 | }; | |
146 | ||
147 | struct complaint missing_tag = | |
148 | { | |
149 | "DIE @ 0x%x \"%s\", missing class, structure, or union tag", 0, 0 | |
150 | }; | |
151 | ||
152 | struct complaint bad_array_element_type = | |
153 | { | |
154 | "DIE @ 0x%x \"%s\", bad array element type attribute 0x%x", 0, 0 | |
155 | }; | |
156 | ||
157 | struct complaint subscript_data_items = | |
158 | { | |
159 | "DIE @ 0x%x \"%s\", can't decode subscript data items", 0, 0 | |
160 | }; | |
161 | ||
162 | struct complaint unhandled_array_subscript_format = | |
163 | { | |
164 | "DIE @ 0x%x \"%s\", array subscript format 0x%x not handled yet", 0, 0 | |
165 | }; | |
166 | ||
167 | struct complaint unknown_array_subscript_format = | |
168 | { | |
169 | "DIE @ 0x%x \"%s\", unknown array subscript format %x", 0, 0 | |
170 | }; | |
171 | ||
172 | struct complaint not_row_major = | |
173 | { | |
174 | "DIE @ 0x%x \"%s\", array not row major; not handled correctly", 0, 0 | |
175 | }; | |
35f5886e | 176 | |
13b5a7ff | 177 | typedef unsigned int DIE_REF; /* Reference to a DIE */ |
35f5886e | 178 | |
4d315a07 FF |
179 | #ifndef GCC_PRODUCER |
180 | #define GCC_PRODUCER "GNU C " | |
181 | #endif | |
35f5886e | 182 | |
2dbde378 FF |
183 | #ifndef GPLUS_PRODUCER |
184 | #define GPLUS_PRODUCER "GNU C++ " | |
185 | #endif | |
186 | ||
187 | #ifndef LCC_PRODUCER | |
3dc755fb | 188 | #define LCC_PRODUCER "NCR C/C++" |
2dbde378 FF |
189 | #endif |
190 | ||
93bb6e65 FF |
191 | #ifndef CHILL_PRODUCER |
192 | #define CHILL_PRODUCER "GNU Chill " | |
193 | #endif | |
93bb6e65 | 194 | |
84bdfea6 PS |
195 | /* Provide a default mapping from a DWARF register number to a gdb REGNUM. */ |
196 | #ifndef DWARF_REG_TO_REGNUM | |
197 | #define DWARF_REG_TO_REGNUM(num) (num) | |
198 | #endif | |
199 | ||
13b5a7ff FF |
200 | /* Flags to target_to_host() that tell whether or not the data object is |
201 | expected to be signed. Used, for example, when fetching a signed | |
202 | integer in the target environment which is used as a signed integer | |
203 | in the host environment, and the two environments have different sized | |
204 | ints. In this case, *somebody* has to sign extend the smaller sized | |
205 | int. */ | |
206 | ||
207 | #define GET_UNSIGNED 0 /* No sign extension required */ | |
208 | #define GET_SIGNED 1 /* Sign extension required */ | |
209 | ||
210 | /* Defines for things which are specified in the document "DWARF Debugging | |
211 | Information Format" published by UNIX International, Programming Languages | |
212 | SIG. These defines are based on revision 1.0.0, Jan 20, 1992. */ | |
213 | ||
214 | #define SIZEOF_DIE_LENGTH 4 | |
215 | #define SIZEOF_DIE_TAG 2 | |
216 | #define SIZEOF_ATTRIBUTE 2 | |
217 | #define SIZEOF_FORMAT_SPECIFIER 1 | |
218 | #define SIZEOF_FMT_FT 2 | |
219 | #define SIZEOF_LINETBL_LENGTH 4 | |
220 | #define SIZEOF_LINETBL_LINENO 4 | |
221 | #define SIZEOF_LINETBL_STMT 2 | |
222 | #define SIZEOF_LINETBL_DELTA 4 | |
223 | #define SIZEOF_LOC_ATOM_CODE 1 | |
224 | ||
225 | #define FORM_FROM_ATTR(attr) ((attr) & 0xF) /* Implicitly specified */ | |
226 | ||
227 | /* Macros that return the sizes of various types of data in the target | |
228 | environment. | |
229 | ||
2d6d969c FF |
230 | FIXME: Currently these are just compile time constants (as they are in |
231 | other parts of gdb as well). They need to be able to get the right size | |
232 | either from the bfd or possibly from the DWARF info. It would be nice if | |
233 | the DWARF producer inserted DIES that describe the fundamental types in | |
234 | the target environment into the DWARF info, similar to the way dbx stabs | |
235 | producers produce information about their fundamental types. */ | |
236 | ||
237 | #define TARGET_FT_POINTER_SIZE(objfile) (TARGET_PTR_BIT / TARGET_CHAR_BIT) | |
238 | #define TARGET_FT_LONG_SIZE(objfile) (TARGET_LONG_BIT / TARGET_CHAR_BIT) | |
95967e73 | 239 | |
768be6e1 FF |
240 | /* The Amiga SVR4 header file <dwarf.h> defines AT_element_list as a |
241 | FORM_BLOCK2, and this is the value emitted by the AT&T compiler. | |
242 | However, the Issue 2 DWARF specification from AT&T defines it as | |
243 | a FORM_BLOCK4, as does the latest specification from UI/PLSIG. | |
244 | For backwards compatibility with the AT&T compiler produced executables | |
245 | we define AT_short_element_list for this variant. */ | |
246 | ||
247 | #define AT_short_element_list (0x00f0|FORM_BLOCK2) | |
248 | ||
249 | /* External variables referenced. */ | |
250 | ||
35f5886e | 251 | extern int info_verbose; /* From main.c; nonzero => verbose */ |
318bf84f | 252 | extern char *warning_pre_print; /* From utils.c */ |
35f5886e FF |
253 | |
254 | /* The DWARF debugging information consists of two major pieces, | |
255 | one is a block of DWARF Information Entries (DIE's) and the other | |
256 | is a line number table. The "struct dieinfo" structure contains | |
257 | the information for a single DIE, the one currently being processed. | |
258 | ||
259 | In order to make it easier to randomly access the attribute fields | |
13b5a7ff | 260 | of the current DIE, which are specifically unordered within the DIE, |
35f5886e FF |
261 | each DIE is scanned and an instance of the "struct dieinfo" |
262 | structure is initialized. | |
263 | ||
264 | Initialization is done in two levels. The first, done by basicdieinfo(), | |
265 | just initializes those fields that are vital to deciding whether or not | |
266 | to use this DIE, how to skip past it, etc. The second, done by the | |
267 | function completedieinfo(), fills in the rest of the information. | |
268 | ||
269 | Attributes which have block forms are not interpreted at the time | |
270 | the DIE is scanned, instead we just save pointers to the start | |
271 | of their value fields. | |
272 | ||
273 | Some fields have a flag <name>_p that is set when the value of the | |
274 | field is valid (I.E. we found a matching attribute in the DIE). Since | |
275 | we may want to test for the presence of some attributes in the DIE, | |
2d6186f4 | 276 | such as AT_low_pc, without restricting the values of the field, |
35f5886e FF |
277 | we need someway to note that we found such an attribute. |
278 | ||
279 | */ | |
280 | ||
281 | typedef char BLOCK; | |
282 | ||
283 | struct dieinfo { | |
13b5a7ff FF |
284 | char * die; /* Pointer to the raw DIE data */ |
285 | unsigned long die_length; /* Length of the raw DIE data */ | |
286 | DIE_REF die_ref; /* Offset of this DIE */ | |
287 | unsigned short die_tag; /* Tag for this DIE */ | |
288 | unsigned long at_padding; | |
289 | unsigned long at_sibling; | |
290 | BLOCK * at_location; | |
291 | char * at_name; | |
292 | unsigned short at_fund_type; | |
293 | BLOCK * at_mod_fund_type; | |
294 | unsigned long at_user_def_type; | |
295 | BLOCK * at_mod_u_d_type; | |
296 | unsigned short at_ordering; | |
297 | BLOCK * at_subscr_data; | |
298 | unsigned long at_byte_size; | |
299 | unsigned short at_bit_offset; | |
300 | unsigned long at_bit_size; | |
301 | BLOCK * at_element_list; | |
302 | unsigned long at_stmt_list; | |
306d27ca DE |
303 | CORE_ADDR at_low_pc; |
304 | CORE_ADDR at_high_pc; | |
13b5a7ff FF |
305 | unsigned long at_language; |
306 | unsigned long at_member; | |
307 | unsigned long at_discr; | |
308 | BLOCK * at_discr_value; | |
13b5a7ff FF |
309 | BLOCK * at_string_length; |
310 | char * at_comp_dir; | |
311 | char * at_producer; | |
13b5a7ff FF |
312 | unsigned long at_start_scope; |
313 | unsigned long at_stride_size; | |
314 | unsigned long at_src_info; | |
315 | char * at_prototyped; | |
316 | unsigned int has_at_low_pc:1; | |
317 | unsigned int has_at_stmt_list:1; | |
50055e94 | 318 | unsigned int has_at_byte_size:1; |
13b5a7ff | 319 | unsigned int short_element_list:1; |
35f5886e FF |
320 | }; |
321 | ||
322 | static int diecount; /* Approximate count of dies for compilation unit */ | |
323 | static struct dieinfo *curdie; /* For warnings and such */ | |
324 | ||
325 | static char *dbbase; /* Base pointer to dwarf info */ | |
4090fe1c | 326 | static int dbsize; /* Size of dwarf info in bytes */ |
35f5886e FF |
327 | static int dbroff; /* Relative offset from start of .debug section */ |
328 | static char *lnbase; /* Base pointer to line section */ | |
329 | static int isreg; /* Kludge to identify register variables */ | |
a1c8d76e JK |
330 | /* Kludge to identify basereg references. Nonzero if we have an offset |
331 | relative to a basereg. */ | |
332 | static int offreg; | |
333 | /* Which base register is it relative to? */ | |
334 | static int basereg; | |
35f5886e | 335 | |
2670f34d | 336 | /* This value is added to each symbol value. FIXME: Generalize to |
3c02636b JK |
337 | the section_offsets structure used by dbxread (once this is done, |
338 | pass the appropriate section number to end_symtab). */ | |
35f5886e FF |
339 | static CORE_ADDR baseaddr; /* Add to each symbol value */ |
340 | ||
2670f34d JG |
341 | /* The section offsets used in the current psymtab or symtab. FIXME, |
342 | only used to pass one value (baseaddr) at the moment. */ | |
343 | static struct section_offsets *base_section_offsets; | |
344 | ||
f133a597 JK |
345 | /* We put a pointer to this structure in the read_symtab_private field |
346 | of the psymtab. */ | |
35f5886e FF |
347 | |
348 | struct dwfinfo { | |
989d9cba JK |
349 | /* Always the absolute file offset to the start of the ".debug" |
350 | section for the file containing the DIE's being accessed. */ | |
351 | file_ptr dbfoff; | |
352 | /* Relative offset from the start of the ".debug" section to the | |
353 | first DIE to be accessed. When building the partial symbol | |
354 | table, this value will be zero since we are accessing the | |
355 | entire ".debug" section. When expanding a partial symbol | |
356 | table entry, this value will be the offset to the first | |
357 | DIE for the compilation unit containing the symbol that | |
358 | triggers the expansion. */ | |
359 | int dbroff; | |
360 | /* The size of the chunk of DIE's being examined, in bytes. */ | |
361 | int dblength; | |
362 | /* The absolute file offset to the line table fragment. Ignored | |
363 | when building partial symbol tables, but used when expanding | |
364 | them, and contains the absolute file offset to the fragment | |
365 | of the ".line" section containing the line numbers for the | |
366 | current compilation unit. */ | |
367 | file_ptr lnfoff; | |
35f5886e FF |
368 | }; |
369 | ||
370 | #define DBFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbfoff) | |
371 | #define DBROFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbroff) | |
372 | #define DBLENGTH(p) (((struct dwfinfo *)((p)->read_symtab_private))->dblength) | |
373 | #define LNFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->lnfoff) | |
374 | ||
4d315a07 FF |
375 | /* The generic symbol table building routines have separate lists for |
376 | file scope symbols and all all other scopes (local scopes). So | |
377 | we need to select the right one to pass to add_symbol_to_list(). | |
378 | We do it by keeping a pointer to the correct list in list_in_scope. | |
35f5886e | 379 | |
4d315a07 FF |
380 | FIXME: The original dwarf code just treated the file scope as the first |
381 | local scope, and all other local scopes as nested local scopes, and worked | |
382 | fine. Check to see if we really need to distinguish these in buildsym.c */ | |
35f5886e | 383 | |
99140c31 | 384 | struct pending **list_in_scope = &file_symbols; |
35f5886e FF |
385 | |
386 | /* DIES which have user defined types or modified user defined types refer to | |
387 | other DIES for the type information. Thus we need to associate the offset | |
388 | of a DIE for a user defined type with a pointer to the type information. | |
389 | ||
390 | Originally this was done using a simple but expensive algorithm, with an | |
391 | array of unsorted structures, each containing an offset/type-pointer pair. | |
392 | This array was scanned linearly each time a lookup was done. The result | |
393 | was that gdb was spending over half it's startup time munging through this | |
394 | array of pointers looking for a structure that had the right offset member. | |
395 | ||
396 | The second attempt used the same array of structures, but the array was | |
397 | sorted using qsort each time a new offset/type was recorded, and a binary | |
398 | search was used to find the type pointer for a given DIE offset. This was | |
399 | even slower, due to the overhead of sorting the array each time a new | |
400 | offset/type pair was entered. | |
401 | ||
402 | The third attempt uses a fixed size array of type pointers, indexed by a | |
403 | value derived from the DIE offset. Since the minimum DIE size is 4 bytes, | |
404 | we can divide any DIE offset by 4 to obtain a unique index into this fixed | |
405 | size array. Since each element is a 4 byte pointer, it takes exactly as | |
406 | much memory to hold this array as to hold the DWARF info for a given | |
bf229b4e FF |
407 | compilation unit. But it gets freed as soon as we are done with it. |
408 | This has worked well in practice, as a reasonable tradeoff between memory | |
409 | consumption and speed, without having to resort to much more complicated | |
410 | algorithms. */ | |
35f5886e FF |
411 | |
412 | static struct type **utypes; /* Pointer to array of user type pointers */ | |
413 | static int numutypes; /* Max number of user type pointers */ | |
414 | ||
bf229b4e FF |
415 | /* Maintain an array of referenced fundamental types for the current |
416 | compilation unit being read. For DWARF version 1, we have to construct | |
417 | the fundamental types on the fly, since no information about the | |
418 | fundamental types is supplied. Each such fundamental type is created by | |
419 | calling a language dependent routine to create the type, and then a | |
420 | pointer to that type is then placed in the array at the index specified | |
421 | by it's FT_<TYPENAME> value. The array has a fixed size set by the | |
422 | FT_NUM_MEMBERS compile time constant, which is the number of predefined | |
423 | fundamental types gdb knows how to construct. */ | |
424 | ||
425 | static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */ | |
426 | ||
95ff889e FF |
427 | /* Record the language for the compilation unit which is currently being |
428 | processed. We know it once we have seen the TAG_compile_unit DIE, | |
429 | and we need it while processing the DIE's for that compilation unit. | |
430 | It is eventually saved in the symtab structure, but we don't finalize | |
431 | the symtab struct until we have processed all the DIE's for the | |
bf229b4e FF |
432 | compilation unit. We also need to get and save a pointer to the |
433 | language struct for this language, so we can call the language | |
434 | dependent routines for doing things such as creating fundamental | |
435 | types. */ | |
95ff889e FF |
436 | |
437 | static enum language cu_language; | |
bf229b4e | 438 | static const struct language_defn *cu_language_defn; |
95ff889e | 439 | |
35f5886e | 440 | /* Forward declarations of static functions so we don't have to worry |
1ab3bf1b JG |
441 | about ordering within this file. */ |
442 | ||
13b5a7ff FF |
443 | static int |
444 | attribute_size PARAMS ((unsigned int)); | |
445 | ||
306d27ca | 446 | static CORE_ADDR |
13b5a7ff | 447 | target_to_host PARAMS ((char *, int, int, struct objfile *)); |
95967e73 | 448 | |
1ab3bf1b JG |
449 | static void |
450 | add_enum_psymbol PARAMS ((struct dieinfo *, struct objfile *)); | |
451 | ||
2dbde378 FF |
452 | static void |
453 | handle_producer PARAMS ((char *)); | |
454 | ||
1ab3bf1b JG |
455 | static void |
456 | read_file_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); | |
35f5886e | 457 | |
58050209 | 458 | static void |
1ab3bf1b | 459 | read_func_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
460 | |
461 | static void | |
1ab3bf1b JG |
462 | read_lexical_block_scope PARAMS ((struct dieinfo *, char *, char *, |
463 | struct objfile *)); | |
35f5886e | 464 | |
35f5886e | 465 | static void |
1ab3bf1b | 466 | scan_partial_symbols PARAMS ((char *, char *, struct objfile *)); |
35f5886e | 467 | |
35f5886e | 468 | static void |
d5931d79 JG |
469 | scan_compilation_units PARAMS ((char *, char *, file_ptr, |
470 | file_ptr, struct objfile *)); | |
35f5886e FF |
471 | |
472 | static void | |
1ab3bf1b | 473 | add_partial_symbol PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e | 474 | |
35f5886e | 475 | static void |
95967e73 | 476 | basicdieinfo PARAMS ((struct dieinfo *, char *, struct objfile *)); |
35f5886e FF |
477 | |
478 | static void | |
95967e73 | 479 | completedieinfo PARAMS ((struct dieinfo *, struct objfile *)); |
1ab3bf1b JG |
480 | |
481 | static void | |
482 | dwarf_psymtab_to_symtab PARAMS ((struct partial_symtab *)); | |
483 | ||
484 | static void | |
485 | psymtab_to_symtab_1 PARAMS ((struct partial_symtab *)); | |
35f5886e | 486 | |
c701c14c | 487 | static void |
1ab3bf1b | 488 | read_ofile_symtab PARAMS ((struct partial_symtab *)); |
35f5886e FF |
489 | |
490 | static void | |
1ab3bf1b | 491 | process_dies PARAMS ((char *, char *, struct objfile *)); |
35f5886e FF |
492 | |
493 | static void | |
1ab3bf1b JG |
494 | read_structure_scope PARAMS ((struct dieinfo *, char *, char *, |
495 | struct objfile *)); | |
35f5886e FF |
496 | |
497 | static struct type * | |
84ffdec2 | 498 | decode_array_element_type PARAMS ((char *)); |
35f5886e FF |
499 | |
500 | static struct type * | |
85f0a848 | 501 | decode_subscript_data_item PARAMS ((char *, char *)); |
35f5886e FF |
502 | |
503 | static void | |
1ab3bf1b | 504 | dwarf_read_array_type PARAMS ((struct dieinfo *)); |
35f5886e | 505 | |
9e4c1921 | 506 | static void |
1ab3bf1b | 507 | read_tag_pointer_type PARAMS ((struct dieinfo *dip)); |
9e4c1921 | 508 | |
ec16f701 FF |
509 | static void |
510 | read_tag_string_type PARAMS ((struct dieinfo *dip)); | |
511 | ||
35f5886e | 512 | static void |
1ab3bf1b | 513 | read_subroutine_type PARAMS ((struct dieinfo *, char *, char *)); |
35f5886e FF |
514 | |
515 | static void | |
1ab3bf1b | 516 | read_enumeration PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
517 | |
518 | static struct type * | |
1ab3bf1b | 519 | struct_type PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
520 | |
521 | static struct type * | |
1ab3bf1b | 522 | enum_type PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e | 523 | |
35f5886e | 524 | static void |
1ab3bf1b | 525 | decode_line_numbers PARAMS ((char *)); |
35f5886e FF |
526 | |
527 | static struct type * | |
1ab3bf1b | 528 | decode_die_type PARAMS ((struct dieinfo *)); |
35f5886e FF |
529 | |
530 | static struct type * | |
1ab3bf1b | 531 | decode_mod_fund_type PARAMS ((char *)); |
35f5886e FF |
532 | |
533 | static struct type * | |
1ab3bf1b | 534 | decode_mod_u_d_type PARAMS ((char *)); |
35f5886e FF |
535 | |
536 | static struct type * | |
1c92ca6f | 537 | decode_modified_type PARAMS ((char *, unsigned int, int)); |
35f5886e FF |
538 | |
539 | static struct type * | |
1ab3bf1b | 540 | decode_fund_type PARAMS ((unsigned int)); |
35f5886e FF |
541 | |
542 | static char * | |
1ab3bf1b | 543 | create_name PARAMS ((char *, struct obstack *)); |
35f5886e | 544 | |
35f5886e | 545 | static struct type * |
13b5a7ff | 546 | lookup_utype PARAMS ((DIE_REF)); |
35f5886e FF |
547 | |
548 | static struct type * | |
13b5a7ff | 549 | alloc_utype PARAMS ((DIE_REF, struct type *)); |
35f5886e FF |
550 | |
551 | static struct symbol * | |
1ab3bf1b | 552 | new_symbol PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e | 553 | |
95ff889e FF |
554 | static void |
555 | synthesize_typedef PARAMS ((struct dieinfo *, struct objfile *, | |
556 | struct type *)); | |
557 | ||
35f5886e | 558 | static int |
1ab3bf1b | 559 | locval PARAMS ((char *)); |
35f5886e | 560 | |
95ff889e FF |
561 | static void |
562 | set_cu_language PARAMS ((struct dieinfo *)); | |
563 | ||
bf229b4e FF |
564 | static struct type * |
565 | dwarf_fundamental_type PARAMS ((struct objfile *, int)); | |
566 | ||
567 | ||
568 | /* | |
569 | ||
570 | LOCAL FUNCTION | |
571 | ||
572 | dwarf_fundamental_type -- lookup or create a fundamental type | |
573 | ||
574 | SYNOPSIS | |
575 | ||
576 | struct type * | |
577 | dwarf_fundamental_type (struct objfile *objfile, int typeid) | |
578 | ||
579 | DESCRIPTION | |
580 | ||
581 | DWARF version 1 doesn't supply any fundamental type information, | |
582 | so gdb has to construct such types. It has a fixed number of | |
583 | fundamental types that it knows how to construct, which is the | |
584 | union of all types that it knows how to construct for all languages | |
585 | that it knows about. These are enumerated in gdbtypes.h. | |
586 | ||
587 | As an example, assume we find a DIE that references a DWARF | |
588 | fundamental type of FT_integer. We first look in the ftypes | |
589 | array to see if we already have such a type, indexed by the | |
590 | gdb internal value of FT_INTEGER. If so, we simply return a | |
591 | pointer to that type. If not, then we ask an appropriate | |
592 | language dependent routine to create a type FT_INTEGER, using | |
593 | defaults reasonable for the current target machine, and install | |
594 | that type in ftypes for future reference. | |
595 | ||
596 | RETURNS | |
597 | ||
598 | Pointer to a fundamental type. | |
599 | ||
600 | */ | |
601 | ||
602 | static struct type * | |
603 | dwarf_fundamental_type (objfile, typeid) | |
604 | struct objfile *objfile; | |
605 | int typeid; | |
606 | { | |
607 | if (typeid < 0 || typeid >= FT_NUM_MEMBERS) | |
608 | { | |
609 | error ("internal error - invalid fundamental type id %d", typeid); | |
610 | } | |
611 | ||
612 | /* Look for this particular type in the fundamental type vector. If one is | |
613 | not found, create and install one appropriate for the current language | |
614 | and the current target machine. */ | |
615 | ||
616 | if (ftypes[typeid] == NULL) | |
617 | { | |
618 | ftypes[typeid] = cu_language_defn -> la_fund_type(objfile, typeid); | |
619 | } | |
620 | ||
621 | return (ftypes[typeid]); | |
622 | } | |
623 | ||
95ff889e FF |
624 | /* |
625 | ||
626 | LOCAL FUNCTION | |
627 | ||
628 | set_cu_language -- set local copy of language for compilation unit | |
629 | ||
630 | SYNOPSIS | |
631 | ||
632 | void | |
633 | set_cu_language (struct dieinfo *dip) | |
634 | ||
635 | DESCRIPTION | |
636 | ||
637 | Decode the language attribute for a compilation unit DIE and | |
638 | remember what the language was. We use this at various times | |
639 | when processing DIE's for a given compilation unit. | |
640 | ||
641 | RETURNS | |
642 | ||
643 | No return value. | |
644 | ||
645 | */ | |
646 | ||
647 | static void | |
648 | set_cu_language (dip) | |
649 | struct dieinfo *dip; | |
650 | { | |
651 | switch (dip -> at_language) | |
652 | { | |
653 | case LANG_C89: | |
654 | case LANG_C: | |
655 | cu_language = language_c; | |
656 | break; | |
657 | case LANG_C_PLUS_PLUS: | |
658 | cu_language = language_cplus; | |
659 | break; | |
e58de8a2 FF |
660 | case LANG_CHILL: |
661 | cu_language = language_chill; | |
662 | break; | |
663 | case LANG_MODULA2: | |
664 | cu_language = language_m2; | |
665 | break; | |
95ff889e FF |
666 | case LANG_ADA83: |
667 | case LANG_COBOL74: | |
668 | case LANG_COBOL85: | |
669 | case LANG_FORTRAN77: | |
670 | case LANG_FORTRAN90: | |
671 | case LANG_PASCAL83: | |
2e4964ad | 672 | /* We don't know anything special about these yet. */ |
95ff889e FF |
673 | cu_language = language_unknown; |
674 | break; | |
2e4964ad FF |
675 | default: |
676 | /* If no at_language, try to deduce one from the filename */ | |
677 | cu_language = deduce_language_from_filename (dip -> at_name); | |
678 | break; | |
95ff889e | 679 | } |
bf229b4e | 680 | cu_language_defn = language_def (cu_language); |
95ff889e FF |
681 | } |
682 | ||
35f5886e FF |
683 | /* |
684 | ||
685 | GLOBAL FUNCTION | |
686 | ||
687 | dwarf_build_psymtabs -- build partial symtabs from DWARF debug info | |
688 | ||
689 | SYNOPSIS | |
690 | ||
d5931d79 | 691 | void dwarf_build_psymtabs (struct objfile *objfile, |
2670f34d | 692 | struct section_offsets *section_offsets, |
d5931d79 JG |
693 | int mainline, file_ptr dbfoff, unsigned int dbfsize, |
694 | file_ptr lnoffset, unsigned int lnsize) | |
35f5886e FF |
695 | |
696 | DESCRIPTION | |
697 | ||
698 | This function is called upon to build partial symtabs from files | |
699 | containing DIE's (Dwarf Information Entries) and DWARF line numbers. | |
700 | ||
d5931d79 | 701 | It is passed a bfd* containing the DIES |
35f5886e FF |
702 | and line number information, the corresponding filename for that |
703 | file, a base address for relocating the symbols, a flag indicating | |
704 | whether or not this debugging information is from a "main symbol | |
705 | table" rather than a shared library or dynamically linked file, | |
706 | and file offset/size pairs for the DIE information and line number | |
707 | information. | |
708 | ||
709 | RETURNS | |
710 | ||
711 | No return value. | |
712 | ||
713 | */ | |
714 | ||
715 | void | |
d5931d79 JG |
716 | dwarf_build_psymtabs (objfile, section_offsets, mainline, dbfoff, dbfsize, |
717 | lnoffset, lnsize) | |
718 | struct objfile *objfile; | |
2670f34d | 719 | struct section_offsets *section_offsets; |
1ab3bf1b | 720 | int mainline; |
d5931d79 | 721 | file_ptr dbfoff; |
4090fe1c | 722 | unsigned int dbfsize; |
d5931d79 | 723 | file_ptr lnoffset; |
1ab3bf1b | 724 | unsigned int lnsize; |
35f5886e | 725 | { |
d5931d79 | 726 | bfd *abfd = objfile->obfd; |
35f5886e FF |
727 | struct cleanup *back_to; |
728 | ||
95967e73 | 729 | current_objfile = objfile; |
4090fe1c | 730 | dbsize = dbfsize; |
35f5886e FF |
731 | dbbase = xmalloc (dbsize); |
732 | dbroff = 0; | |
d5931d79 JG |
733 | if ((bfd_seek (abfd, dbfoff, L_SET) != 0) || |
734 | (bfd_read (dbbase, dbsize, 1, abfd) != dbsize)) | |
35f5886e FF |
735 | { |
736 | free (dbbase); | |
d5931d79 | 737 | error ("can't read DWARF data from '%s'", bfd_get_filename (abfd)); |
35f5886e FF |
738 | } |
739 | back_to = make_cleanup (free, dbbase); | |
740 | ||
741 | /* If we are reinitializing, or if we have never loaded syms yet, init. | |
742 | Since we have no idea how many DIES we are looking at, we just guess | |
743 | some arbitrary value. */ | |
744 | ||
13b5a7ff FF |
745 | if (mainline || objfile -> global_psymbols.size == 0 || |
746 | objfile -> static_psymbols.size == 0) | |
35f5886e | 747 | { |
1ab3bf1b | 748 | init_psymbol_list (objfile, 1024); |
35f5886e FF |
749 | } |
750 | ||
84ffdec2 | 751 | /* Save the relocation factor where everybody can see it. */ |
f8b76e70 | 752 | |
2670f34d JG |
753 | base_section_offsets = section_offsets; |
754 | baseaddr = ANOFFSET (section_offsets, 0); | |
f8b76e70 | 755 | |
35f5886e FF |
756 | /* Follow the compilation unit sibling chain, building a partial symbol |
757 | table entry for each one. Save enough information about each compilation | |
758 | unit to locate the full DWARF information later. */ | |
759 | ||
d5931d79 | 760 | scan_compilation_units (dbbase, dbbase + dbsize, dbfoff, lnoffset, objfile); |
35f5886e | 761 | |
35f5886e | 762 | do_cleanups (back_to); |
95967e73 | 763 | current_objfile = NULL; |
35f5886e FF |
764 | } |
765 | ||
35f5886e FF |
766 | /* |
767 | ||
35f5886e FF |
768 | LOCAL FUNCTION |
769 | ||
770 | read_lexical_block_scope -- process all dies in a lexical block | |
771 | ||
772 | SYNOPSIS | |
773 | ||
774 | static void read_lexical_block_scope (struct dieinfo *dip, | |
775 | char *thisdie, char *enddie) | |
776 | ||
777 | DESCRIPTION | |
778 | ||
779 | Process all the DIES contained within a lexical block scope. | |
780 | Start a new scope, process the dies, and then close the scope. | |
781 | ||
782 | */ | |
783 | ||
784 | static void | |
1ab3bf1b JG |
785 | read_lexical_block_scope (dip, thisdie, enddie, objfile) |
786 | struct dieinfo *dip; | |
787 | char *thisdie; | |
788 | char *enddie; | |
789 | struct objfile *objfile; | |
35f5886e | 790 | { |
4d315a07 FF |
791 | register struct context_stack *new; |
792 | ||
4ed3a9ea | 793 | push_context (0, dip -> at_low_pc); |
13b5a7ff | 794 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 FF |
795 | new = pop_context (); |
796 | if (local_symbols != NULL) | |
797 | { | |
798 | finish_block (0, &local_symbols, new -> old_blocks, new -> start_addr, | |
1ab3bf1b | 799 | dip -> at_high_pc, objfile); |
4d315a07 FF |
800 | } |
801 | local_symbols = new -> locals; | |
35f5886e FF |
802 | } |
803 | ||
804 | /* | |
805 | ||
806 | LOCAL FUNCTION | |
807 | ||
808 | lookup_utype -- look up a user defined type from die reference | |
809 | ||
810 | SYNOPSIS | |
811 | ||
13b5a7ff | 812 | static type *lookup_utype (DIE_REF die_ref) |
35f5886e FF |
813 | |
814 | DESCRIPTION | |
815 | ||
816 | Given a DIE reference, lookup the user defined type associated with | |
817 | that DIE, if it has been registered already. If not registered, then | |
818 | return NULL. Alloc_utype() can be called to register an empty | |
819 | type for this reference, which will be filled in later when the | |
820 | actual referenced DIE is processed. | |
821 | */ | |
822 | ||
823 | static struct type * | |
13b5a7ff FF |
824 | lookup_utype (die_ref) |
825 | DIE_REF die_ref; | |
35f5886e FF |
826 | { |
827 | struct type *type = NULL; | |
828 | int utypeidx; | |
829 | ||
13b5a7ff | 830 | utypeidx = (die_ref - dbroff) / 4; |
35f5886e FF |
831 | if ((utypeidx < 0) || (utypeidx >= numutypes)) |
832 | { | |
51b80b00 | 833 | complain (&bad_die_ref, DIE_ID, DIE_NAME); |
35f5886e FF |
834 | } |
835 | else | |
836 | { | |
837 | type = *(utypes + utypeidx); | |
838 | } | |
839 | return (type); | |
840 | } | |
841 | ||
842 | ||
843 | /* | |
844 | ||
845 | LOCAL FUNCTION | |
846 | ||
847 | alloc_utype -- add a user defined type for die reference | |
848 | ||
849 | SYNOPSIS | |
850 | ||
13b5a7ff | 851 | static type *alloc_utype (DIE_REF die_ref, struct type *utypep) |
35f5886e FF |
852 | |
853 | DESCRIPTION | |
854 | ||
13b5a7ff | 855 | Given a die reference DIE_REF, and a possible pointer to a user |
35f5886e FF |
856 | defined type UTYPEP, register that this reference has a user |
857 | defined type and either use the specified type in UTYPEP or | |
858 | make a new empty type that will be filled in later. | |
859 | ||
860 | We should only be called after calling lookup_utype() to verify that | |
13b5a7ff | 861 | there is not currently a type registered for DIE_REF. |
35f5886e FF |
862 | */ |
863 | ||
864 | static struct type * | |
13b5a7ff FF |
865 | alloc_utype (die_ref, utypep) |
866 | DIE_REF die_ref; | |
1ab3bf1b | 867 | struct type *utypep; |
35f5886e FF |
868 | { |
869 | struct type **typep; | |
870 | int utypeidx; | |
871 | ||
13b5a7ff | 872 | utypeidx = (die_ref - dbroff) / 4; |
35f5886e FF |
873 | typep = utypes + utypeidx; |
874 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
875 | { | |
bf229b4e | 876 | utypep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
51b80b00 | 877 | complain (&bad_die_ref, DIE_ID, DIE_NAME); |
35f5886e FF |
878 | } |
879 | else if (*typep != NULL) | |
880 | { | |
881 | utypep = *typep; | |
51b80b00 | 882 | complain (&dup_user_type_allocation, DIE_ID, DIE_NAME); |
35f5886e FF |
883 | } |
884 | else | |
885 | { | |
886 | if (utypep == NULL) | |
887 | { | |
8050a57b | 888 | utypep = alloc_type (current_objfile); |
35f5886e FF |
889 | } |
890 | *typep = utypep; | |
891 | } | |
892 | return (utypep); | |
893 | } | |
894 | ||
895 | /* | |
896 | ||
897 | LOCAL FUNCTION | |
898 | ||
899 | decode_die_type -- return a type for a specified die | |
900 | ||
901 | SYNOPSIS | |
902 | ||
903 | static struct type *decode_die_type (struct dieinfo *dip) | |
904 | ||
905 | DESCRIPTION | |
906 | ||
907 | Given a pointer to a die information structure DIP, decode the | |
908 | type of the die and return a pointer to the decoded type. All | |
909 | dies without specific types default to type int. | |
910 | */ | |
911 | ||
912 | static struct type * | |
1ab3bf1b JG |
913 | decode_die_type (dip) |
914 | struct dieinfo *dip; | |
35f5886e FF |
915 | { |
916 | struct type *type = NULL; | |
917 | ||
918 | if (dip -> at_fund_type != 0) | |
919 | { | |
920 | type = decode_fund_type (dip -> at_fund_type); | |
921 | } | |
922 | else if (dip -> at_mod_fund_type != NULL) | |
923 | { | |
924 | type = decode_mod_fund_type (dip -> at_mod_fund_type); | |
925 | } | |
926 | else if (dip -> at_user_def_type) | |
927 | { | |
928 | if ((type = lookup_utype (dip -> at_user_def_type)) == NULL) | |
929 | { | |
930 | type = alloc_utype (dip -> at_user_def_type, NULL); | |
931 | } | |
932 | } | |
933 | else if (dip -> at_mod_u_d_type) | |
934 | { | |
935 | type = decode_mod_u_d_type (dip -> at_mod_u_d_type); | |
936 | } | |
937 | else | |
938 | { | |
bf229b4e | 939 | type = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
35f5886e FF |
940 | } |
941 | return (type); | |
942 | } | |
943 | ||
944 | /* | |
945 | ||
946 | LOCAL FUNCTION | |
947 | ||
948 | struct_type -- compute and return the type for a struct or union | |
949 | ||
950 | SYNOPSIS | |
951 | ||
952 | static struct type *struct_type (struct dieinfo *dip, char *thisdie, | |
8b5b6fae | 953 | char *enddie, struct objfile *objfile) |
35f5886e FF |
954 | |
955 | DESCRIPTION | |
956 | ||
957 | Given pointer to a die information structure for a die which | |
715cafcb FF |
958 | defines a union or structure (and MUST define one or the other), |
959 | and pointers to the raw die data that define the range of dies which | |
960 | define the members, compute and return the user defined type for the | |
961 | structure or union. | |
35f5886e FF |
962 | */ |
963 | ||
964 | static struct type * | |
1ab3bf1b JG |
965 | struct_type (dip, thisdie, enddie, objfile) |
966 | struct dieinfo *dip; | |
967 | char *thisdie; | |
968 | char *enddie; | |
969 | struct objfile *objfile; | |
35f5886e FF |
970 | { |
971 | struct type *type; | |
972 | struct nextfield { | |
973 | struct nextfield *next; | |
974 | struct field field; | |
975 | }; | |
976 | struct nextfield *list = NULL; | |
977 | struct nextfield *new; | |
978 | int nfields = 0; | |
979 | int n; | |
35f5886e | 980 | struct dieinfo mbr; |
8b5b6fae | 981 | char *nextdie; |
50055e94 | 982 | int anonymous_size; |
35f5886e | 983 | |
13b5a7ff | 984 | if ((type = lookup_utype (dip -> die_ref)) == NULL) |
35f5886e | 985 | { |
5edf98d7 | 986 | /* No forward references created an empty type, so install one now */ |
13b5a7ff | 987 | type = alloc_utype (dip -> die_ref, NULL); |
35f5886e | 988 | } |
a3723a43 | 989 | INIT_CPLUS_SPECIFIC(type); |
13b5a7ff | 990 | switch (dip -> die_tag) |
35f5886e | 991 | { |
95ff889e FF |
992 | case TAG_class_type: |
993 | TYPE_CODE (type) = TYPE_CODE_CLASS; | |
95ff889e | 994 | break; |
715cafcb | 995 | case TAG_structure_type: |
5edf98d7 | 996 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
715cafcb FF |
997 | break; |
998 | case TAG_union_type: | |
999 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
715cafcb FF |
1000 | break; |
1001 | default: | |
1002 | /* Should never happen */ | |
1003 | TYPE_CODE (type) = TYPE_CODE_UNDEF; | |
51b80b00 | 1004 | complain (&missing_tag, DIE_ID, DIE_NAME); |
715cafcb | 1005 | break; |
35f5886e | 1006 | } |
5edf98d7 FF |
1007 | /* Some compilers try to be helpful by inventing "fake" names for |
1008 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1009 | Thanks, but no thanks... */ | |
715cafcb FF |
1010 | if (dip -> at_name != NULL |
1011 | && *dip -> at_name != '~' | |
1012 | && *dip -> at_name != '.') | |
35f5886e | 1013 | { |
b2bebdb0 JK |
1014 | TYPE_TAG_NAME (type) = obconcat (&objfile -> type_obstack, |
1015 | "", "", dip -> at_name); | |
35f5886e | 1016 | } |
50055e94 FF |
1017 | /* Use whatever size is known. Zero is a valid size. We might however |
1018 | wish to check has_at_byte_size to make sure that some byte size was | |
1019 | given explicitly, but DWARF doesn't specify that explicit sizes of | |
1020 | zero have to present, so complaining about missing sizes should | |
1021 | probably not be the default. */ | |
1022 | TYPE_LENGTH (type) = dip -> at_byte_size; | |
13b5a7ff | 1023 | thisdie += dip -> die_length; |
35f5886e FF |
1024 | while (thisdie < enddie) |
1025 | { | |
95967e73 FF |
1026 | basicdieinfo (&mbr, thisdie, objfile); |
1027 | completedieinfo (&mbr, objfile); | |
13b5a7ff | 1028 | if (mbr.die_length <= SIZEOF_DIE_LENGTH) |
35f5886e FF |
1029 | { |
1030 | break; | |
1031 | } | |
8b5b6fae FF |
1032 | else if (mbr.at_sibling != 0) |
1033 | { | |
1034 | nextdie = dbbase + mbr.at_sibling - dbroff; | |
1035 | } | |
1036 | else | |
1037 | { | |
13b5a7ff | 1038 | nextdie = thisdie + mbr.die_length; |
8b5b6fae | 1039 | } |
13b5a7ff | 1040 | switch (mbr.die_tag) |
35f5886e FF |
1041 | { |
1042 | case TAG_member: | |
1043 | /* Get space to record the next field's data. */ | |
1044 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1045 | new -> next = list; | |
1046 | list = new; | |
1047 | /* Save the data. */ | |
50e0dc41 FF |
1048 | list -> field.name = |
1049 | obsavestring (mbr.at_name, strlen (mbr.at_name), | |
1050 | &objfile -> type_obstack); | |
35f5886e FF |
1051 | list -> field.type = decode_die_type (&mbr); |
1052 | list -> field.bitpos = 8 * locval (mbr.at_location); | |
4db8e515 FF |
1053 | /* Handle bit fields. */ |
1054 | list -> field.bitsize = mbr.at_bit_size; | |
b8176214 | 1055 | if (BITS_BIG_ENDIAN) |
4db8e515 | 1056 | { |
b8176214 ILT |
1057 | /* For big endian bits, the at_bit_offset gives the |
1058 | additional bit offset from the MSB of the containing | |
1059 | anonymous object to the MSB of the field. We don't | |
1060 | have to do anything special since we don't need to | |
1061 | know the size of the anonymous object. */ | |
1062 | list -> field.bitpos += mbr.at_bit_offset; | |
1063 | } | |
1064 | else | |
1065 | { | |
1066 | /* For little endian bits, we need to have a non-zero | |
1067 | at_bit_size, so that we know we are in fact dealing | |
1068 | with a bitfield. Compute the bit offset to the MSB | |
1069 | of the anonymous object, subtract off the number of | |
1070 | bits from the MSB of the field to the MSB of the | |
1071 | object, and then subtract off the number of bits of | |
1072 | the field itself. The result is the bit offset of | |
1073 | the LSB of the field. */ | |
1074 | if (mbr.at_bit_size > 0) | |
50055e94 | 1075 | { |
b8176214 ILT |
1076 | if (mbr.has_at_byte_size) |
1077 | { | |
1078 | /* The size of the anonymous object containing | |
1079 | the bit field is explicit, so use the | |
1080 | indicated size (in bytes). */ | |
1081 | anonymous_size = mbr.at_byte_size; | |
1082 | } | |
1083 | else | |
1084 | { | |
1085 | /* The size of the anonymous object containing | |
1086 | the bit field matches the size of an object | |
1087 | of the bit field's type. DWARF allows | |
1088 | at_byte_size to be left out in such cases, as | |
1089 | a debug information size optimization. */ | |
1090 | anonymous_size = TYPE_LENGTH (list -> field.type); | |
1091 | } | |
1092 | list -> field.bitpos += | |
1093 | anonymous_size * 8 - mbr.at_bit_offset - mbr.at_bit_size; | |
50055e94 | 1094 | } |
4db8e515 | 1095 | } |
35f5886e FF |
1096 | nfields++; |
1097 | break; | |
1098 | default: | |
8b5b6fae | 1099 | process_dies (thisdie, nextdie, objfile); |
35f5886e FF |
1100 | break; |
1101 | } | |
8b5b6fae | 1102 | thisdie = nextdie; |
35f5886e | 1103 | } |
5edf98d7 FF |
1104 | /* Now create the vector of fields, and record how big it is. We may |
1105 | not even have any fields, if this DIE was generated due to a reference | |
1106 | to an anonymous structure or union. In this case, TYPE_FLAG_STUB is | |
1107 | set, which clues gdb in to the fact that it needs to search elsewhere | |
1108 | for the full structure definition. */ | |
1109 | if (nfields == 0) | |
35f5886e | 1110 | { |
5edf98d7 FF |
1111 | TYPE_FLAGS (type) |= TYPE_FLAG_STUB; |
1112 | } | |
1113 | else | |
1114 | { | |
1115 | TYPE_NFIELDS (type) = nfields; | |
1116 | TYPE_FIELDS (type) = (struct field *) | |
dac9734e | 1117 | TYPE_ALLOC (type, sizeof (struct field) * nfields); |
5edf98d7 FF |
1118 | /* Copy the saved-up fields into the field vector. */ |
1119 | for (n = nfields; list; list = list -> next) | |
1120 | { | |
1121 | TYPE_FIELD (type, --n) = list -> field; | |
1122 | } | |
1123 | } | |
35f5886e FF |
1124 | return (type); |
1125 | } | |
1126 | ||
1127 | /* | |
1128 | ||
1129 | LOCAL FUNCTION | |
1130 | ||
1131 | read_structure_scope -- process all dies within struct or union | |
1132 | ||
1133 | SYNOPSIS | |
1134 | ||
1135 | static void read_structure_scope (struct dieinfo *dip, | |
8b5b6fae | 1136 | char *thisdie, char *enddie, struct objfile *objfile) |
35f5886e FF |
1137 | |
1138 | DESCRIPTION | |
1139 | ||
1140 | Called when we find the DIE that starts a structure or union | |
1141 | scope (definition) to process all dies that define the members | |
1142 | of the structure or union. DIP is a pointer to the die info | |
1143 | struct for the DIE that names the structure or union. | |
1144 | ||
1145 | NOTES | |
1146 | ||
1147 | Note that we need to call struct_type regardless of whether or not | |
84ce6717 FF |
1148 | the DIE has an at_name attribute, since it might be an anonymous |
1149 | structure or union. This gets the type entered into our set of | |
1150 | user defined types. | |
1151 | ||
1152 | However, if the structure is incomplete (an opaque struct/union) | |
1153 | then suppress creating a symbol table entry for it since gdb only | |
1154 | wants to find the one with the complete definition. Note that if | |
1155 | it is complete, we just call new_symbol, which does it's own | |
1156 | checking about whether the struct/union is anonymous or not (and | |
1157 | suppresses creating a symbol table entry itself). | |
1158 | ||
35f5886e FF |
1159 | */ |
1160 | ||
1161 | static void | |
1ab3bf1b JG |
1162 | read_structure_scope (dip, thisdie, enddie, objfile) |
1163 | struct dieinfo *dip; | |
1164 | char *thisdie; | |
1165 | char *enddie; | |
1166 | struct objfile *objfile; | |
35f5886e FF |
1167 | { |
1168 | struct type *type; | |
1169 | struct symbol *sym; | |
1170 | ||
8b5b6fae | 1171 | type = struct_type (dip, thisdie, enddie, objfile); |
84ce6717 | 1172 | if (!(TYPE_FLAGS (type) & TYPE_FLAG_STUB)) |
35f5886e | 1173 | { |
95ff889e FF |
1174 | sym = new_symbol (dip, objfile); |
1175 | if (sym != NULL) | |
84ce6717 FF |
1176 | { |
1177 | SYMBOL_TYPE (sym) = type; | |
95ff889e FF |
1178 | if (cu_language == language_cplus) |
1179 | { | |
1180 | synthesize_typedef (dip, objfile, type); | |
1181 | } | |
84ce6717 | 1182 | } |
35f5886e FF |
1183 | } |
1184 | } | |
1185 | ||
1186 | /* | |
1187 | ||
1188 | LOCAL FUNCTION | |
1189 | ||
1190 | decode_array_element_type -- decode type of the array elements | |
1191 | ||
1192 | SYNOPSIS | |
1193 | ||
1194 | static struct type *decode_array_element_type (char *scan, char *end) | |
1195 | ||
1196 | DESCRIPTION | |
1197 | ||
1198 | As the last step in decoding the array subscript information for an | |
1199 | array DIE, we need to decode the type of the array elements. We are | |
1200 | passed a pointer to this last part of the subscript information and | |
1201 | must return the appropriate type. If the type attribute is not | |
1202 | recognized, just warn about the problem and return type int. | |
1203 | */ | |
1204 | ||
1205 | static struct type * | |
84ffdec2 | 1206 | decode_array_element_type (scan) |
1ab3bf1b | 1207 | char *scan; |
35f5886e FF |
1208 | { |
1209 | struct type *typep; | |
13b5a7ff FF |
1210 | DIE_REF die_ref; |
1211 | unsigned short attribute; | |
35f5886e | 1212 | unsigned short fundtype; |
13b5a7ff | 1213 | int nbytes; |
35f5886e | 1214 | |
13b5a7ff FF |
1215 | attribute = target_to_host (scan, SIZEOF_ATTRIBUTE, GET_UNSIGNED, |
1216 | current_objfile); | |
1217 | scan += SIZEOF_ATTRIBUTE; | |
1218 | if ((nbytes = attribute_size (attribute)) == -1) | |
1219 | { | |
51b80b00 | 1220 | complain (&bad_array_element_type, DIE_ID, DIE_NAME, attribute); |
bf229b4e | 1221 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff FF |
1222 | } |
1223 | else | |
1224 | { | |
1225 | switch (attribute) | |
1226 | { | |
1227 | case AT_fund_type: | |
1228 | fundtype = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1229 | current_objfile); | |
1230 | typep = decode_fund_type (fundtype); | |
1231 | break; | |
1232 | case AT_mod_fund_type: | |
1233 | typep = decode_mod_fund_type (scan); | |
1234 | break; | |
1235 | case AT_user_def_type: | |
1236 | die_ref = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1237 | current_objfile); | |
1238 | if ((typep = lookup_utype (die_ref)) == NULL) | |
1239 | { | |
1240 | typep = alloc_utype (die_ref, NULL); | |
1241 | } | |
1242 | break; | |
1243 | case AT_mod_u_d_type: | |
1244 | typep = decode_mod_u_d_type (scan); | |
1245 | break; | |
1246 | default: | |
51b80b00 | 1247 | complain (&bad_array_element_type, DIE_ID, DIE_NAME, attribute); |
bf229b4e | 1248 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff FF |
1249 | break; |
1250 | } | |
35f5886e FF |
1251 | } |
1252 | return (typep); | |
1253 | } | |
1254 | ||
1255 | /* | |
1256 | ||
1257 | LOCAL FUNCTION | |
1258 | ||
85f0a848 | 1259 | decode_subscript_data_item -- decode array subscript item |
35f5886e FF |
1260 | |
1261 | SYNOPSIS | |
1262 | ||
85f0a848 FF |
1263 | static struct type * |
1264 | decode_subscript_data_item (char *scan, char *end) | |
35f5886e FF |
1265 | |
1266 | DESCRIPTION | |
1267 | ||
1268 | The array subscripts and the data type of the elements of an | |
1269 | array are described by a list of data items, stored as a block | |
1270 | of contiguous bytes. There is a data item describing each array | |
1271 | dimension, and a final data item describing the element type. | |
1272 | The data items are ordered the same as their appearance in the | |
1273 | source (I.E. leftmost dimension first, next to leftmost second, | |
1274 | etc). | |
1275 | ||
85f0a848 FF |
1276 | The data items describing each array dimension consist of four |
1277 | parts: (1) a format specifier, (2) type type of the subscript | |
1278 | index, (3) a description of the low bound of the array dimension, | |
1279 | and (4) a description of the high bound of the array dimension. | |
1280 | ||
1281 | The last data item is the description of the type of each of | |
1282 | the array elements. | |
1283 | ||
35f5886e | 1284 | We are passed a pointer to the start of the block of bytes |
85f0a848 FF |
1285 | containing the remaining data items, and a pointer to the first |
1286 | byte past the data. This function recursively decodes the | |
1287 | remaining data items and returns a type. | |
1288 | ||
1289 | If we somehow fail to decode some data, we complain about it | |
1290 | and return a type "array of int". | |
35f5886e FF |
1291 | |
1292 | BUGS | |
1293 | FIXME: This code only implements the forms currently used | |
1294 | by the AT&T and GNU C compilers. | |
1295 | ||
1296 | The end pointer is supplied for error checking, maybe we should | |
1297 | use it for that... | |
1298 | */ | |
1299 | ||
1300 | static struct type * | |
85f0a848 | 1301 | decode_subscript_data_item (scan, end) |
1ab3bf1b JG |
1302 | char *scan; |
1303 | char *end; | |
35f5886e | 1304 | { |
85f0a848 FF |
1305 | struct type *typep = NULL; /* Array type we are building */ |
1306 | struct type *nexttype; /* Type of each element (may be array) */ | |
1307 | struct type *indextype; /* Type of this index */ | |
a8a69e63 | 1308 | struct type *rangetype; |
13b5a7ff FF |
1309 | unsigned int format; |
1310 | unsigned short fundtype; | |
1311 | unsigned long lowbound; | |
1312 | unsigned long highbound; | |
1313 | int nbytes; | |
35f5886e | 1314 | |
13b5a7ff FF |
1315 | format = target_to_host (scan, SIZEOF_FORMAT_SPECIFIER, GET_UNSIGNED, |
1316 | current_objfile); | |
1317 | scan += SIZEOF_FORMAT_SPECIFIER; | |
35f5886e FF |
1318 | switch (format) |
1319 | { | |
1320 | case FMT_ET: | |
84ffdec2 | 1321 | typep = decode_array_element_type (scan); |
35f5886e FF |
1322 | break; |
1323 | case FMT_FT_C_C: | |
13b5a7ff FF |
1324 | fundtype = target_to_host (scan, SIZEOF_FMT_FT, GET_UNSIGNED, |
1325 | current_objfile); | |
85f0a848 | 1326 | indextype = decode_fund_type (fundtype); |
13b5a7ff | 1327 | scan += SIZEOF_FMT_FT; |
160be0de FF |
1328 | nbytes = TARGET_FT_LONG_SIZE (current_objfile); |
1329 | lowbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1330 | scan += nbytes; | |
1331 | highbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1332 | scan += nbytes; | |
85f0a848 FF |
1333 | nexttype = decode_subscript_data_item (scan, end); |
1334 | if (nexttype == NULL) | |
35f5886e | 1335 | { |
85f0a848 | 1336 | /* Munged subscript data or other problem, fake it. */ |
51b80b00 | 1337 | complain (&subscript_data_items, DIE_ID, DIE_NAME); |
85f0a848 FF |
1338 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1339 | } | |
a8a69e63 FF |
1340 | rangetype = create_range_type ((struct type *) NULL, indextype, |
1341 | lowbound, highbound); | |
1342 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
35f5886e FF |
1343 | break; |
1344 | case FMT_FT_C_X: | |
1345 | case FMT_FT_X_C: | |
1346 | case FMT_FT_X_X: | |
1347 | case FMT_UT_C_C: | |
1348 | case FMT_UT_C_X: | |
1349 | case FMT_UT_X_C: | |
1350 | case FMT_UT_X_X: | |
51b80b00 | 1351 | complain (&unhandled_array_subscript_format, DIE_ID, DIE_NAME, format); |
a8a69e63 FF |
1352 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1353 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1354 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
35f5886e FF |
1355 | break; |
1356 | default: | |
51b80b00 | 1357 | complain (&unknown_array_subscript_format, DIE_ID, DIE_NAME, format); |
a8a69e63 FF |
1358 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1359 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1360 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
35f5886e FF |
1361 | break; |
1362 | } | |
1363 | return (typep); | |
1364 | } | |
1365 | ||
1366 | /* | |
1367 | ||
1368 | LOCAL FUNCTION | |
1369 | ||
4d315a07 | 1370 | dwarf_read_array_type -- read TAG_array_type DIE |
35f5886e FF |
1371 | |
1372 | SYNOPSIS | |
1373 | ||
4d315a07 | 1374 | static void dwarf_read_array_type (struct dieinfo *dip) |
35f5886e FF |
1375 | |
1376 | DESCRIPTION | |
1377 | ||
1378 | Extract all information from a TAG_array_type DIE and add to | |
1379 | the user defined type vector. | |
1380 | */ | |
1381 | ||
1382 | static void | |
1ab3bf1b JG |
1383 | dwarf_read_array_type (dip) |
1384 | struct dieinfo *dip; | |
35f5886e FF |
1385 | { |
1386 | struct type *type; | |
af213624 | 1387 | struct type *utype; |
35f5886e FF |
1388 | char *sub; |
1389 | char *subend; | |
13b5a7ff FF |
1390 | unsigned short blocksz; |
1391 | int nbytes; | |
35f5886e FF |
1392 | |
1393 | if (dip -> at_ordering != ORD_row_major) | |
1394 | { | |
1395 | /* FIXME: Can gdb even handle column major arrays? */ | |
51b80b00 | 1396 | complain (¬_row_major, DIE_ID, DIE_NAME); |
35f5886e FF |
1397 | } |
1398 | if ((sub = dip -> at_subscr_data) != NULL) | |
1399 | { | |
13b5a7ff FF |
1400 | nbytes = attribute_size (AT_subscr_data); |
1401 | blocksz = target_to_host (sub, nbytes, GET_UNSIGNED, current_objfile); | |
1402 | subend = sub + nbytes + blocksz; | |
1403 | sub += nbytes; | |
85f0a848 FF |
1404 | type = decode_subscript_data_item (sub, subend); |
1405 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) | |
35f5886e | 1406 | { |
85f0a848 FF |
1407 | /* Install user defined type that has not been referenced yet. */ |
1408 | alloc_utype (dip -> die_ref, type); | |
1409 | } | |
1410 | else if (TYPE_CODE (utype) == TYPE_CODE_UNDEF) | |
1411 | { | |
1412 | /* Ick! A forward ref has already generated a blank type in our | |
1413 | slot, and this type probably already has things pointing to it | |
1414 | (which is what caused it to be created in the first place). | |
1415 | If it's just a place holder we can plop our fully defined type | |
1416 | on top of it. We can't recover the space allocated for our | |
1417 | new type since it might be on an obstack, but we could reuse | |
1418 | it if we kept a list of them, but it might not be worth it | |
1419 | (FIXME). */ | |
1420 | *utype = *type; | |
35f5886e FF |
1421 | } |
1422 | else | |
1423 | { | |
85f0a848 FF |
1424 | /* Double ick! Not only is a type already in our slot, but |
1425 | someone has decorated it. Complain and leave it alone. */ | |
51b80b00 | 1426 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); |
35f5886e FF |
1427 | } |
1428 | } | |
1429 | } | |
1430 | ||
1431 | /* | |
1432 | ||
9e4c1921 FF |
1433 | LOCAL FUNCTION |
1434 | ||
1435 | read_tag_pointer_type -- read TAG_pointer_type DIE | |
1436 | ||
1437 | SYNOPSIS | |
1438 | ||
1439 | static void read_tag_pointer_type (struct dieinfo *dip) | |
1440 | ||
1441 | DESCRIPTION | |
1442 | ||
1443 | Extract all information from a TAG_pointer_type DIE and add to | |
1444 | the user defined type vector. | |
1445 | */ | |
1446 | ||
1447 | static void | |
1ab3bf1b JG |
1448 | read_tag_pointer_type (dip) |
1449 | struct dieinfo *dip; | |
9e4c1921 FF |
1450 | { |
1451 | struct type *type; | |
1452 | struct type *utype; | |
9e4c1921 FF |
1453 | |
1454 | type = decode_die_type (dip); | |
13b5a7ff | 1455 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) |
9e4c1921 FF |
1456 | { |
1457 | utype = lookup_pointer_type (type); | |
4ed3a9ea | 1458 | alloc_utype (dip -> die_ref, utype); |
9e4c1921 FF |
1459 | } |
1460 | else | |
1461 | { | |
1462 | TYPE_TARGET_TYPE (utype) = type; | |
1463 | TYPE_POINTER_TYPE (type) = utype; | |
1464 | ||
1465 | /* We assume the machine has only one representation for pointers! */ | |
1466 | /* FIXME: This confuses host<->target data representations, and is a | |
1467 | poor assumption besides. */ | |
1468 | ||
1469 | TYPE_LENGTH (utype) = sizeof (char *); | |
1470 | TYPE_CODE (utype) = TYPE_CODE_PTR; | |
1471 | } | |
1472 | } | |
1473 | ||
1474 | /* | |
1475 | ||
ec16f701 FF |
1476 | LOCAL FUNCTION |
1477 | ||
1478 | read_tag_string_type -- read TAG_string_type DIE | |
1479 | ||
1480 | SYNOPSIS | |
1481 | ||
1482 | static void read_tag_string_type (struct dieinfo *dip) | |
1483 | ||
1484 | DESCRIPTION | |
1485 | ||
1486 | Extract all information from a TAG_string_type DIE and add to | |
1487 | the user defined type vector. It isn't really a user defined | |
1488 | type, but it behaves like one, with other DIE's using an | |
1489 | AT_user_def_type attribute to reference it. | |
1490 | */ | |
1491 | ||
1492 | static void | |
1493 | read_tag_string_type (dip) | |
1494 | struct dieinfo *dip; | |
1495 | { | |
1496 | struct type *utype; | |
1497 | struct type *indextype; | |
1498 | struct type *rangetype; | |
1499 | unsigned long lowbound = 0; | |
1500 | unsigned long highbound; | |
1501 | ||
b6236d6e | 1502 | if (dip -> has_at_byte_size) |
ec16f701 | 1503 | { |
b6236d6e FF |
1504 | /* A fixed bounds string */ |
1505 | highbound = dip -> at_byte_size - 1; | |
ec16f701 FF |
1506 | } |
1507 | else | |
1508 | { | |
b6236d6e FF |
1509 | /* A varying length string. Stub for now. (FIXME) */ |
1510 | highbound = 1; | |
1511 | } | |
1512 | indextype = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1513 | rangetype = create_range_type ((struct type *) NULL, indextype, lowbound, | |
1514 | highbound); | |
1515 | ||
1516 | utype = lookup_utype (dip -> die_ref); | |
1517 | if (utype == NULL) | |
1518 | { | |
1519 | /* No type defined, go ahead and create a blank one to use. */ | |
1520 | utype = alloc_utype (dip -> die_ref, (struct type *) NULL); | |
1521 | } | |
1522 | else | |
1523 | { | |
1524 | /* Already a type in our slot due to a forward reference. Make sure it | |
1525 | is a blank one. If not, complain and leave it alone. */ | |
1526 | if (TYPE_CODE (utype) != TYPE_CODE_UNDEF) | |
ec16f701 | 1527 | { |
b6236d6e FF |
1528 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); |
1529 | return; | |
ec16f701 | 1530 | } |
ec16f701 | 1531 | } |
b6236d6e FF |
1532 | |
1533 | /* Create the string type using the blank type we either found or created. */ | |
1534 | utype = create_string_type (utype, rangetype); | |
ec16f701 FF |
1535 | } |
1536 | ||
1537 | /* | |
1538 | ||
35f5886e FF |
1539 | LOCAL FUNCTION |
1540 | ||
1541 | read_subroutine_type -- process TAG_subroutine_type dies | |
1542 | ||
1543 | SYNOPSIS | |
1544 | ||
1545 | static void read_subroutine_type (struct dieinfo *dip, char thisdie, | |
1546 | char *enddie) | |
1547 | ||
1548 | DESCRIPTION | |
1549 | ||
1550 | Handle DIES due to C code like: | |
1551 | ||
1552 | struct foo { | |
1553 | int (*funcp)(int a, long l); (Generates TAG_subroutine_type DIE) | |
1554 | int b; | |
1555 | }; | |
1556 | ||
1557 | NOTES | |
1558 | ||
1559 | The parameter DIES are currently ignored. See if gdb has a way to | |
1560 | include this info in it's type system, and decode them if so. Is | |
1561 | this what the type structure's "arg_types" field is for? (FIXME) | |
1562 | */ | |
1563 | ||
1564 | static void | |
1ab3bf1b JG |
1565 | read_subroutine_type (dip, thisdie, enddie) |
1566 | struct dieinfo *dip; | |
1567 | char *thisdie; | |
1568 | char *enddie; | |
35f5886e | 1569 | { |
af213624 FF |
1570 | struct type *type; /* Type that this function returns */ |
1571 | struct type *ftype; /* Function that returns above type */ | |
35f5886e | 1572 | |
af213624 FF |
1573 | /* Decode the type that this subroutine returns */ |
1574 | ||
35f5886e | 1575 | type = decode_die_type (dip); |
af213624 FF |
1576 | |
1577 | /* Check to see if we already have a partially constructed user | |
1578 | defined type for this DIE, from a forward reference. */ | |
1579 | ||
13b5a7ff | 1580 | if ((ftype = lookup_utype (dip -> die_ref)) == NULL) |
af213624 FF |
1581 | { |
1582 | /* This is the first reference to one of these types. Make | |
1583 | a new one and place it in the user defined types. */ | |
1584 | ftype = lookup_function_type (type); | |
4ed3a9ea | 1585 | alloc_utype (dip -> die_ref, ftype); |
af213624 | 1586 | } |
85f0a848 | 1587 | else if (TYPE_CODE (ftype) == TYPE_CODE_UNDEF) |
af213624 FF |
1588 | { |
1589 | /* We have an existing partially constructed type, so bash it | |
1590 | into the correct type. */ | |
1591 | TYPE_TARGET_TYPE (ftype) = type; | |
af213624 FF |
1592 | TYPE_LENGTH (ftype) = 1; |
1593 | TYPE_CODE (ftype) = TYPE_CODE_FUNC; | |
1594 | } | |
85f0a848 FF |
1595 | else |
1596 | { | |
51b80b00 | 1597 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); |
85f0a848 | 1598 | } |
35f5886e FF |
1599 | } |
1600 | ||
1601 | /* | |
1602 | ||
1603 | LOCAL FUNCTION | |
1604 | ||
1605 | read_enumeration -- process dies which define an enumeration | |
1606 | ||
1607 | SYNOPSIS | |
1608 | ||
1609 | static void read_enumeration (struct dieinfo *dip, char *thisdie, | |
1ab3bf1b | 1610 | char *enddie, struct objfile *objfile) |
35f5886e FF |
1611 | |
1612 | DESCRIPTION | |
1613 | ||
1614 | Given a pointer to a die which begins an enumeration, process all | |
1615 | the dies that define the members of the enumeration. | |
1616 | ||
1617 | NOTES | |
1618 | ||
1619 | Note that we need to call enum_type regardless of whether or not we | |
1620 | have a symbol, since we might have an enum without a tag name (thus | |
1621 | no symbol for the tagname). | |
1622 | */ | |
1623 | ||
1624 | static void | |
1ab3bf1b JG |
1625 | read_enumeration (dip, thisdie, enddie, objfile) |
1626 | struct dieinfo *dip; | |
1627 | char *thisdie; | |
1628 | char *enddie; | |
1629 | struct objfile *objfile; | |
35f5886e FF |
1630 | { |
1631 | struct type *type; | |
1632 | struct symbol *sym; | |
1633 | ||
1ab3bf1b | 1634 | type = enum_type (dip, objfile); |
95ff889e FF |
1635 | sym = new_symbol (dip, objfile); |
1636 | if (sym != NULL) | |
35f5886e FF |
1637 | { |
1638 | SYMBOL_TYPE (sym) = type; | |
95ff889e FF |
1639 | if (cu_language == language_cplus) |
1640 | { | |
1641 | synthesize_typedef (dip, objfile, type); | |
1642 | } | |
35f5886e FF |
1643 | } |
1644 | } | |
1645 | ||
1646 | /* | |
1647 | ||
1648 | LOCAL FUNCTION | |
1649 | ||
1650 | enum_type -- decode and return a type for an enumeration | |
1651 | ||
1652 | SYNOPSIS | |
1653 | ||
1ab3bf1b | 1654 | static type *enum_type (struct dieinfo *dip, struct objfile *objfile) |
35f5886e FF |
1655 | |
1656 | DESCRIPTION | |
1657 | ||
1658 | Given a pointer to a die information structure for the die which | |
1659 | starts an enumeration, process all the dies that define the members | |
1660 | of the enumeration and return a type pointer for the enumeration. | |
98618bf7 | 1661 | |
715cafcb FF |
1662 | At the same time, for each member of the enumeration, create a |
1663 | symbol for it with namespace VAR_NAMESPACE and class LOC_CONST, | |
1664 | and give it the type of the enumeration itself. | |
1665 | ||
1666 | NOTES | |
1667 | ||
98618bf7 FF |
1668 | Note that the DWARF specification explicitly mandates that enum |
1669 | constants occur in reverse order from the source program order, | |
1670 | for "consistency" and because this ordering is easier for many | |
1ab3bf1b | 1671 | compilers to generate. (Draft 6, sec 3.8.5, Enumeration type |
715cafcb FF |
1672 | Entries). Because gdb wants to see the enum members in program |
1673 | source order, we have to ensure that the order gets reversed while | |
98618bf7 | 1674 | we are processing them. |
35f5886e FF |
1675 | */ |
1676 | ||
1677 | static struct type * | |
1ab3bf1b JG |
1678 | enum_type (dip, objfile) |
1679 | struct dieinfo *dip; | |
1680 | struct objfile *objfile; | |
35f5886e FF |
1681 | { |
1682 | struct type *type; | |
1683 | struct nextfield { | |
1684 | struct nextfield *next; | |
1685 | struct field field; | |
1686 | }; | |
1687 | struct nextfield *list = NULL; | |
1688 | struct nextfield *new; | |
1689 | int nfields = 0; | |
1690 | int n; | |
35f5886e FF |
1691 | char *scan; |
1692 | char *listend; | |
13b5a7ff | 1693 | unsigned short blocksz; |
715cafcb | 1694 | struct symbol *sym; |
13b5a7ff | 1695 | int nbytes; |
35f5886e | 1696 | |
13b5a7ff | 1697 | if ((type = lookup_utype (dip -> die_ref)) == NULL) |
35f5886e | 1698 | { |
84ce6717 | 1699 | /* No forward references created an empty type, so install one now */ |
13b5a7ff | 1700 | type = alloc_utype (dip -> die_ref, NULL); |
35f5886e FF |
1701 | } |
1702 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
84ce6717 FF |
1703 | /* Some compilers try to be helpful by inventing "fake" names for |
1704 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1705 | Thanks, but no thanks... */ | |
715cafcb FF |
1706 | if (dip -> at_name != NULL |
1707 | && *dip -> at_name != '~' | |
1708 | && *dip -> at_name != '.') | |
35f5886e | 1709 | { |
b2bebdb0 JK |
1710 | TYPE_TAG_NAME (type) = obconcat (&objfile -> type_obstack, |
1711 | "", "", dip -> at_name); | |
35f5886e | 1712 | } |
715cafcb | 1713 | if (dip -> at_byte_size != 0) |
35f5886e FF |
1714 | { |
1715 | TYPE_LENGTH (type) = dip -> at_byte_size; | |
35f5886e | 1716 | } |
35f5886e FF |
1717 | if ((scan = dip -> at_element_list) != NULL) |
1718 | { | |
768be6e1 FF |
1719 | if (dip -> short_element_list) |
1720 | { | |
13b5a7ff | 1721 | nbytes = attribute_size (AT_short_element_list); |
768be6e1 FF |
1722 | } |
1723 | else | |
1724 | { | |
13b5a7ff | 1725 | nbytes = attribute_size (AT_element_list); |
768be6e1 | 1726 | } |
13b5a7ff FF |
1727 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); |
1728 | listend = scan + nbytes + blocksz; | |
1729 | scan += nbytes; | |
35f5886e FF |
1730 | while (scan < listend) |
1731 | { | |
1732 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1733 | new -> next = list; | |
1734 | list = new; | |
1735 | list -> field.type = NULL; | |
1736 | list -> field.bitsize = 0; | |
13b5a7ff FF |
1737 | list -> field.bitpos = |
1738 | target_to_host (scan, TARGET_FT_LONG_SIZE (objfile), GET_SIGNED, | |
1739 | objfile); | |
1740 | scan += TARGET_FT_LONG_SIZE (objfile); | |
50e0dc41 FF |
1741 | list -> field.name = obsavestring (scan, strlen (scan), |
1742 | &objfile -> type_obstack); | |
35f5886e FF |
1743 | scan += strlen (scan) + 1; |
1744 | nfields++; | |
715cafcb | 1745 | /* Handcraft a new symbol for this enum member. */ |
1ab3bf1b | 1746 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
715cafcb | 1747 | sizeof (struct symbol)); |
4ed3a9ea | 1748 | memset (sym, 0, sizeof (struct symbol)); |
13b5a7ff FF |
1749 | SYMBOL_NAME (sym) = create_name (list -> field.name, |
1750 | &objfile->symbol_obstack); | |
7532cf10 | 1751 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); |
715cafcb FF |
1752 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
1753 | SYMBOL_CLASS (sym) = LOC_CONST; | |
1754 | SYMBOL_TYPE (sym) = type; | |
1755 | SYMBOL_VALUE (sym) = list -> field.bitpos; | |
4d315a07 | 1756 | add_symbol_to_list (sym, list_in_scope); |
35f5886e | 1757 | } |
84ce6717 | 1758 | /* Now create the vector of fields, and record how big it is. This is |
0efe20a6 | 1759 | where we reverse the order, by pulling the members off the list in |
84ce6717 FF |
1760 | reverse order from how they were inserted. If we have no fields |
1761 | (this is apparently possible in C++) then skip building a field | |
1762 | vector. */ | |
1763 | if (nfields > 0) | |
1764 | { | |
1765 | TYPE_NFIELDS (type) = nfields; | |
1766 | TYPE_FIELDS (type) = (struct field *) | |
1ab3bf1b | 1767 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct field) * nfields); |
84ce6717 FF |
1768 | /* Copy the saved-up fields into the field vector. */ |
1769 | for (n = 0; (n < nfields) && (list != NULL); list = list -> next) | |
1770 | { | |
1771 | TYPE_FIELD (type, n++) = list -> field; | |
1772 | } | |
1773 | } | |
35f5886e | 1774 | } |
35f5886e FF |
1775 | return (type); |
1776 | } | |
1777 | ||
1778 | /* | |
1779 | ||
1780 | LOCAL FUNCTION | |
1781 | ||
1782 | read_func_scope -- process all dies within a function scope | |
1783 | ||
35f5886e FF |
1784 | DESCRIPTION |
1785 | ||
1786 | Process all dies within a given function scope. We are passed | |
1787 | a die information structure pointer DIP for the die which | |
1788 | starts the function scope, and pointers into the raw die data | |
1789 | that define the dies within the function scope. | |
1790 | ||
1791 | For now, we ignore lexical block scopes within the function. | |
1792 | The problem is that AT&T cc does not define a DWARF lexical | |
1793 | block scope for the function itself, while gcc defines a | |
1794 | lexical block scope for the function. We need to think about | |
1795 | how to handle this difference, or if it is even a problem. | |
1796 | (FIXME) | |
1797 | */ | |
1798 | ||
1799 | static void | |
1ab3bf1b JG |
1800 | read_func_scope (dip, thisdie, enddie, objfile) |
1801 | struct dieinfo *dip; | |
1802 | char *thisdie; | |
1803 | char *enddie; | |
1804 | struct objfile *objfile; | |
35f5886e | 1805 | { |
4d315a07 | 1806 | register struct context_stack *new; |
35f5886e | 1807 | |
5e2e79f8 FF |
1808 | if (objfile -> ei.entry_point >= dip -> at_low_pc && |
1809 | objfile -> ei.entry_point < dip -> at_high_pc) | |
35f5886e | 1810 | { |
5e2e79f8 FF |
1811 | objfile -> ei.entry_func_lowpc = dip -> at_low_pc; |
1812 | objfile -> ei.entry_func_highpc = dip -> at_high_pc; | |
35f5886e | 1813 | } |
4d315a07 | 1814 | if (STREQ (dip -> at_name, "main")) /* FIXME: hardwired name */ |
35f5886e | 1815 | { |
5e2e79f8 FF |
1816 | objfile -> ei.main_func_lowpc = dip -> at_low_pc; |
1817 | objfile -> ei.main_func_highpc = dip -> at_high_pc; | |
35f5886e | 1818 | } |
4d315a07 | 1819 | new = push_context (0, dip -> at_low_pc); |
1ab3bf1b | 1820 | new -> name = new_symbol (dip, objfile); |
4d315a07 | 1821 | list_in_scope = &local_symbols; |
13b5a7ff | 1822 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 FF |
1823 | new = pop_context (); |
1824 | /* Make a block for the local symbols within. */ | |
1825 | finish_block (new -> name, &local_symbols, new -> old_blocks, | |
1ab3bf1b | 1826 | new -> start_addr, dip -> at_high_pc, objfile); |
4d315a07 | 1827 | list_in_scope = &file_symbols; |
35f5886e FF |
1828 | } |
1829 | ||
2dbde378 FF |
1830 | |
1831 | /* | |
1832 | ||
1833 | LOCAL FUNCTION | |
1834 | ||
1835 | handle_producer -- process the AT_producer attribute | |
1836 | ||
1837 | DESCRIPTION | |
1838 | ||
1839 | Perform any operations that depend on finding a particular | |
1840 | AT_producer attribute. | |
1841 | ||
1842 | */ | |
1843 | ||
1844 | static void | |
1845 | handle_producer (producer) | |
1846 | char *producer; | |
1847 | { | |
1848 | ||
1849 | /* If this compilation unit was compiled with g++ or gcc, then set the | |
1850 | processing_gcc_compilation flag. */ | |
1851 | ||
1852 | processing_gcc_compilation = | |
1853 | STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER)) | |
93bb6e65 | 1854 | || STREQN (producer, CHILL_PRODUCER, strlen (CHILL_PRODUCER)) |
2dbde378 FF |
1855 | || STREQN (producer, GCC_PRODUCER, strlen (GCC_PRODUCER)); |
1856 | ||
1857 | /* Select a demangling style if we can identify the producer and if | |
1858 | the current style is auto. We leave the current style alone if it | |
1859 | is not auto. We also leave the demangling style alone if we find a | |
1860 | gcc (cc1) producer, as opposed to a g++ (cc1plus) producer. */ | |
1861 | ||
3dc755fb | 1862 | if (AUTO_DEMANGLING) |
2dbde378 FF |
1863 | { |
1864 | if (STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER))) | |
1865 | { | |
1866 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); | |
1867 | } | |
1868 | else if (STREQN (producer, LCC_PRODUCER, strlen (LCC_PRODUCER))) | |
1869 | { | |
1870 | set_demangling_style (LUCID_DEMANGLING_STYLE_STRING); | |
1871 | } | |
2dbde378 | 1872 | } |
2dbde378 FF |
1873 | } |
1874 | ||
1875 | ||
35f5886e FF |
1876 | /* |
1877 | ||
1878 | LOCAL FUNCTION | |
1879 | ||
1880 | read_file_scope -- process all dies within a file scope | |
1881 | ||
35f5886e FF |
1882 | DESCRIPTION |
1883 | ||
1884 | Process all dies within a given file scope. We are passed a | |
1885 | pointer to the die information structure for the die which | |
1886 | starts the file scope, and pointers into the raw die data which | |
1887 | mark the range of dies within the file scope. | |
1888 | ||
1889 | When the partial symbol table is built, the file offset for the line | |
1890 | number table for each compilation unit is saved in the partial symbol | |
1891 | table entry for that compilation unit. As the symbols for each | |
1892 | compilation unit are read, the line number table is read into memory | |
1893 | and the variable lnbase is set to point to it. Thus all we have to | |
1894 | do is use lnbase to access the line number table for the current | |
1895 | compilation unit. | |
1896 | */ | |
1897 | ||
1898 | static void | |
1ab3bf1b JG |
1899 | read_file_scope (dip, thisdie, enddie, objfile) |
1900 | struct dieinfo *dip; | |
1901 | char *thisdie; | |
1902 | char *enddie; | |
1903 | struct objfile *objfile; | |
35f5886e FF |
1904 | { |
1905 | struct cleanup *back_to; | |
4d315a07 | 1906 | struct symtab *symtab; |
35f5886e | 1907 | |
5e2e79f8 FF |
1908 | if (objfile -> ei.entry_point >= dip -> at_low_pc && |
1909 | objfile -> ei.entry_point < dip -> at_high_pc) | |
35f5886e | 1910 | { |
5e2e79f8 FF |
1911 | objfile -> ei.entry_file_lowpc = dip -> at_low_pc; |
1912 | objfile -> ei.entry_file_highpc = dip -> at_high_pc; | |
35f5886e | 1913 | } |
95ff889e | 1914 | set_cu_language (dip); |
4d315a07 FF |
1915 | if (dip -> at_producer != NULL) |
1916 | { | |
2dbde378 | 1917 | handle_producer (dip -> at_producer); |
4d315a07 | 1918 | } |
35f5886e FF |
1919 | numutypes = (enddie - thisdie) / 4; |
1920 | utypes = (struct type **) xmalloc (numutypes * sizeof (struct type *)); | |
1921 | back_to = make_cleanup (free, utypes); | |
4ed3a9ea | 1922 | memset (utypes, 0, numutypes * sizeof (struct type *)); |
bf229b4e | 1923 | memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *)); |
d4902ab0 | 1924 | start_symtab (dip -> at_name, dip -> at_comp_dir, dip -> at_low_pc); |
35f5886e | 1925 | decode_line_numbers (lnbase); |
13b5a7ff | 1926 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
3c02636b JK |
1927 | |
1928 | symtab = end_symtab (dip -> at_high_pc, 0, 0, objfile, 0); | |
7b5d9650 | 1929 | if (symtab != NULL) |
4d315a07 | 1930 | { |
95ff889e | 1931 | symtab -> language = cu_language; |
7b5d9650 | 1932 | } |
35f5886e FF |
1933 | do_cleanups (back_to); |
1934 | utypes = NULL; | |
1935 | numutypes = 0; | |
1936 | } | |
1937 | ||
1938 | /* | |
1939 | ||
35f5886e FF |
1940 | LOCAL FUNCTION |
1941 | ||
1942 | process_dies -- process a range of DWARF Information Entries | |
1943 | ||
1944 | SYNOPSIS | |
1945 | ||
8b5b6fae FF |
1946 | static void process_dies (char *thisdie, char *enddie, |
1947 | struct objfile *objfile) | |
35f5886e FF |
1948 | |
1949 | DESCRIPTION | |
1950 | ||
1951 | Process all DIE's in a specified range. May be (and almost | |
1952 | certainly will be) called recursively. | |
1953 | */ | |
1954 | ||
1955 | static void | |
1ab3bf1b JG |
1956 | process_dies (thisdie, enddie, objfile) |
1957 | char *thisdie; | |
1958 | char *enddie; | |
1959 | struct objfile *objfile; | |
35f5886e FF |
1960 | { |
1961 | char *nextdie; | |
1962 | struct dieinfo di; | |
1963 | ||
1964 | while (thisdie < enddie) | |
1965 | { | |
95967e73 | 1966 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 1967 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
1968 | { |
1969 | break; | |
1970 | } | |
13b5a7ff | 1971 | else if (di.die_tag == TAG_padding) |
35f5886e | 1972 | { |
13b5a7ff | 1973 | nextdie = thisdie + di.die_length; |
35f5886e FF |
1974 | } |
1975 | else | |
1976 | { | |
95967e73 | 1977 | completedieinfo (&di, objfile); |
35f5886e FF |
1978 | if (di.at_sibling != 0) |
1979 | { | |
1980 | nextdie = dbbase + di.at_sibling - dbroff; | |
1981 | } | |
1982 | else | |
1983 | { | |
13b5a7ff | 1984 | nextdie = thisdie + di.die_length; |
35f5886e | 1985 | } |
9fdb3f7a JK |
1986 | #ifdef SMASH_TEXT_ADDRESS |
1987 | /* I think that these are always text, not data, addresses. */ | |
1988 | SMASH_TEXT_ADDRESS (di.at_low_pc); | |
1989 | SMASH_TEXT_ADDRESS (di.at_high_pc); | |
1990 | #endif | |
13b5a7ff | 1991 | switch (di.die_tag) |
35f5886e FF |
1992 | { |
1993 | case TAG_compile_unit: | |
4386eff2 PS |
1994 | /* Skip Tag_compile_unit if we are already inside a compilation |
1995 | unit, we are unable to handle nested compilation units | |
1996 | properly (FIXME). */ | |
1997 | if (current_subfile == NULL) | |
1998 | read_file_scope (&di, thisdie, nextdie, objfile); | |
1999 | else | |
2000 | nextdie = thisdie + di.die_length; | |
35f5886e FF |
2001 | break; |
2002 | case TAG_global_subroutine: | |
2003 | case TAG_subroutine: | |
2d6186f4 | 2004 | if (di.has_at_low_pc) |
35f5886e | 2005 | { |
a048c8f5 | 2006 | read_func_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2007 | } |
2008 | break; | |
2009 | case TAG_lexical_block: | |
a048c8f5 | 2010 | read_lexical_block_scope (&di, thisdie, nextdie, objfile); |
35f5886e | 2011 | break; |
95ff889e | 2012 | case TAG_class_type: |
35f5886e FF |
2013 | case TAG_structure_type: |
2014 | case TAG_union_type: | |
8b5b6fae | 2015 | read_structure_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2016 | break; |
2017 | case TAG_enumeration_type: | |
1ab3bf1b | 2018 | read_enumeration (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2019 | break; |
2020 | case TAG_subroutine_type: | |
2021 | read_subroutine_type (&di, thisdie, nextdie); | |
2022 | break; | |
2023 | case TAG_array_type: | |
4d315a07 | 2024 | dwarf_read_array_type (&di); |
35f5886e | 2025 | break; |
9e4c1921 FF |
2026 | case TAG_pointer_type: |
2027 | read_tag_pointer_type (&di); | |
2028 | break; | |
ec16f701 FF |
2029 | case TAG_string_type: |
2030 | read_tag_string_type (&di); | |
2031 | break; | |
35f5886e | 2032 | default: |
4ed3a9ea | 2033 | new_symbol (&di, objfile); |
35f5886e FF |
2034 | break; |
2035 | } | |
2036 | } | |
2037 | thisdie = nextdie; | |
2038 | } | |
2039 | } | |
2040 | ||
2041 | /* | |
2042 | ||
35f5886e FF |
2043 | LOCAL FUNCTION |
2044 | ||
2045 | decode_line_numbers -- decode a line number table fragment | |
2046 | ||
2047 | SYNOPSIS | |
2048 | ||
2049 | static void decode_line_numbers (char *tblscan, char *tblend, | |
2050 | long length, long base, long line, long pc) | |
2051 | ||
2052 | DESCRIPTION | |
2053 | ||
2054 | Translate the DWARF line number information to gdb form. | |
2055 | ||
2056 | The ".line" section contains one or more line number tables, one for | |
2057 | each ".line" section from the objects that were linked. | |
2058 | ||
2059 | The AT_stmt_list attribute for each TAG_source_file entry in the | |
2060 | ".debug" section contains the offset into the ".line" section for the | |
2061 | start of the table for that file. | |
2062 | ||
2063 | The table itself has the following structure: | |
2064 | ||
2065 | <table length><base address><source statement entry> | |
2066 | 4 bytes 4 bytes 10 bytes | |
2067 | ||
2068 | The table length is the total size of the table, including the 4 bytes | |
2069 | for the length information. | |
2070 | ||
2071 | The base address is the address of the first instruction generated | |
2072 | for the source file. | |
2073 | ||
2074 | Each source statement entry has the following structure: | |
2075 | ||
2076 | <line number><statement position><address delta> | |
2077 | 4 bytes 2 bytes 4 bytes | |
2078 | ||
2079 | The line number is relative to the start of the file, starting with | |
2080 | line 1. | |
2081 | ||
2082 | The statement position either -1 (0xFFFF) or the number of characters | |
2083 | from the beginning of the line to the beginning of the statement. | |
2084 | ||
2085 | The address delta is the difference between the base address and | |
2086 | the address of the first instruction for the statement. | |
2087 | ||
2088 | Note that we must copy the bytes from the packed table to our local | |
2089 | variables before attempting to use them, to avoid alignment problems | |
2090 | on some machines, particularly RISC processors. | |
2091 | ||
2092 | BUGS | |
2093 | ||
2094 | Does gdb expect the line numbers to be sorted? They are now by | |
2095 | chance/luck, but are not required to be. (FIXME) | |
2096 | ||
2097 | The line with number 0 is unused, gdb apparently can discover the | |
2098 | span of the last line some other way. How? (FIXME) | |
2099 | */ | |
2100 | ||
2101 | static void | |
1ab3bf1b JG |
2102 | decode_line_numbers (linetable) |
2103 | char *linetable; | |
35f5886e FF |
2104 | { |
2105 | char *tblscan; | |
2106 | char *tblend; | |
13b5a7ff FF |
2107 | unsigned long length; |
2108 | unsigned long base; | |
2109 | unsigned long line; | |
2110 | unsigned long pc; | |
35f5886e FF |
2111 | |
2112 | if (linetable != NULL) | |
2113 | { | |
2114 | tblscan = tblend = linetable; | |
13b5a7ff FF |
2115 | length = target_to_host (tblscan, SIZEOF_LINETBL_LENGTH, GET_UNSIGNED, |
2116 | current_objfile); | |
2117 | tblscan += SIZEOF_LINETBL_LENGTH; | |
35f5886e | 2118 | tblend += length; |
13b5a7ff FF |
2119 | base = target_to_host (tblscan, TARGET_FT_POINTER_SIZE (objfile), |
2120 | GET_UNSIGNED, current_objfile); | |
2121 | tblscan += TARGET_FT_POINTER_SIZE (objfile); | |
35f5886e | 2122 | base += baseaddr; |
35f5886e FF |
2123 | while (tblscan < tblend) |
2124 | { | |
13b5a7ff FF |
2125 | line = target_to_host (tblscan, SIZEOF_LINETBL_LINENO, GET_UNSIGNED, |
2126 | current_objfile); | |
2127 | tblscan += SIZEOF_LINETBL_LINENO + SIZEOF_LINETBL_STMT; | |
2128 | pc = target_to_host (tblscan, SIZEOF_LINETBL_DELTA, GET_UNSIGNED, | |
2129 | current_objfile); | |
2130 | tblscan += SIZEOF_LINETBL_DELTA; | |
35f5886e | 2131 | pc += base; |
13b5a7ff | 2132 | if (line != 0) |
35f5886e | 2133 | { |
4d315a07 | 2134 | record_line (current_subfile, line, pc); |
35f5886e FF |
2135 | } |
2136 | } | |
2137 | } | |
2138 | } | |
2139 | ||
2140 | /* | |
2141 | ||
35f5886e FF |
2142 | LOCAL FUNCTION |
2143 | ||
2144 | locval -- compute the value of a location attribute | |
2145 | ||
2146 | SYNOPSIS | |
2147 | ||
2148 | static int locval (char *loc) | |
2149 | ||
2150 | DESCRIPTION | |
2151 | ||
2152 | Given pointer to a string of bytes that define a location, compute | |
2153 | the location and return the value. | |
2154 | ||
2155 | When computing values involving the current value of the frame pointer, | |
2156 | the value zero is used, which results in a value relative to the frame | |
2157 | pointer, rather than the absolute value. This is what GDB wants | |
2158 | anyway. | |
2159 | ||
2160 | When the result is a register number, the global isreg flag is set, | |
2161 | otherwise it is cleared. This is a kludge until we figure out a better | |
2162 | way to handle the problem. Gdb's design does not mesh well with the | |
2163 | DWARF notion of a location computing interpreter, which is a shame | |
2164 | because the flexibility goes unused. | |
2165 | ||
2166 | NOTES | |
2167 | ||
2168 | Note that stack[0] is unused except as a default error return. | |
2169 | Note that stack overflow is not yet handled. | |
2170 | */ | |
2171 | ||
2172 | static int | |
1ab3bf1b JG |
2173 | locval (loc) |
2174 | char *loc; | |
35f5886e FF |
2175 | { |
2176 | unsigned short nbytes; | |
13b5a7ff FF |
2177 | unsigned short locsize; |
2178 | auto long stack[64]; | |
35f5886e FF |
2179 | int stacki; |
2180 | char *end; | |
13b5a7ff FF |
2181 | int loc_atom_code; |
2182 | int loc_value_size; | |
35f5886e | 2183 | |
13b5a7ff FF |
2184 | nbytes = attribute_size (AT_location); |
2185 | locsize = target_to_host (loc, nbytes, GET_UNSIGNED, current_objfile); | |
2186 | loc += nbytes; | |
2187 | end = loc + locsize; | |
35f5886e FF |
2188 | stacki = 0; |
2189 | stack[stacki] = 0; | |
2190 | isreg = 0; | |
a5bd5ba6 | 2191 | offreg = 0; |
13b5a7ff FF |
2192 | loc_value_size = TARGET_FT_LONG_SIZE (current_objfile); |
2193 | while (loc < end) | |
35f5886e | 2194 | { |
13b5a7ff FF |
2195 | loc_atom_code = target_to_host (loc, SIZEOF_LOC_ATOM_CODE, GET_UNSIGNED, |
2196 | current_objfile); | |
2197 | loc += SIZEOF_LOC_ATOM_CODE; | |
2198 | switch (loc_atom_code) | |
2199 | { | |
2200 | case 0: | |
2201 | /* error */ | |
2202 | loc = end; | |
2203 | break; | |
2204 | case OP_REG: | |
2205 | /* push register (number) */ | |
84bdfea6 PS |
2206 | stack[++stacki] |
2207 | = DWARF_REG_TO_REGNUM (target_to_host (loc, loc_value_size, | |
2208 | GET_UNSIGNED, | |
2209 | current_objfile)); | |
13b5a7ff FF |
2210 | loc += loc_value_size; |
2211 | isreg = 1; | |
2212 | break; | |
2213 | case OP_BASEREG: | |
2214 | /* push value of register (number) */ | |
a1c8d76e JK |
2215 | /* Actually, we compute the value as if register has 0, so the |
2216 | value ends up being the offset from that register. */ | |
13b5a7ff | 2217 | offreg = 1; |
a1c8d76e JK |
2218 | basereg = target_to_host (loc, loc_value_size, GET_UNSIGNED, |
2219 | current_objfile); | |
13b5a7ff | 2220 | loc += loc_value_size; |
a1c8d76e | 2221 | stack[++stacki] = 0; |
13b5a7ff FF |
2222 | break; |
2223 | case OP_ADDR: | |
2224 | /* push address (relocated address) */ | |
2225 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2226 | GET_UNSIGNED, current_objfile); | |
2227 | loc += loc_value_size; | |
2228 | break; | |
2229 | case OP_CONST: | |
2230 | /* push constant (number) FIXME: signed or unsigned! */ | |
2231 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2232 | GET_SIGNED, current_objfile); | |
2233 | loc += loc_value_size; | |
2234 | break; | |
2235 | case OP_DEREF2: | |
2236 | /* pop, deref and push 2 bytes (as a long) */ | |
51b80b00 | 2237 | complain (&op_deref2, DIE_ID, DIE_NAME, stack[stacki]); |
13b5a7ff FF |
2238 | break; |
2239 | case OP_DEREF4: /* pop, deref and push 4 bytes (as a long) */ | |
51b80b00 | 2240 | complain (&op_deref4, DIE_ID, DIE_NAME, stack[stacki]); |
13b5a7ff FF |
2241 | break; |
2242 | case OP_ADD: /* pop top 2 items, add, push result */ | |
2243 | stack[stacki - 1] += stack[stacki]; | |
2244 | stacki--; | |
2245 | break; | |
2246 | } | |
35f5886e FF |
2247 | } |
2248 | return (stack[stacki]); | |
2249 | } | |
2250 | ||
2251 | /* | |
2252 | ||
2253 | LOCAL FUNCTION | |
2254 | ||
2255 | read_ofile_symtab -- build a full symtab entry from chunk of DIE's | |
2256 | ||
2257 | SYNOPSIS | |
2258 | ||
c701c14c | 2259 | static void read_ofile_symtab (struct partial_symtab *pst) |
35f5886e FF |
2260 | |
2261 | DESCRIPTION | |
2262 | ||
1ab3bf1b JG |
2263 | When expanding a partial symbol table entry to a full symbol table |
2264 | entry, this is the function that gets called to read in the symbols | |
c701c14c FF |
2265 | for the compilation unit. A pointer to the newly constructed symtab, |
2266 | which is now the new first one on the objfile's symtab list, is | |
2267 | stashed in the partial symbol table entry. | |
35f5886e FF |
2268 | */ |
2269 | ||
c701c14c | 2270 | static void |
1ab3bf1b JG |
2271 | read_ofile_symtab (pst) |
2272 | struct partial_symtab *pst; | |
35f5886e FF |
2273 | { |
2274 | struct cleanup *back_to; | |
13b5a7ff | 2275 | unsigned long lnsize; |
d5931d79 | 2276 | file_ptr foffset; |
1ab3bf1b | 2277 | bfd *abfd; |
13b5a7ff | 2278 | char lnsizedata[SIZEOF_LINETBL_LENGTH]; |
1ab3bf1b JG |
2279 | |
2280 | abfd = pst -> objfile -> obfd; | |
2281 | current_objfile = pst -> objfile; | |
2282 | ||
35f5886e FF |
2283 | /* Allocate a buffer for the entire chunk of DIE's for this compilation |
2284 | unit, seek to the location in the file, and read in all the DIE's. */ | |
2285 | ||
2286 | diecount = 0; | |
4090fe1c FF |
2287 | dbsize = DBLENGTH (pst); |
2288 | dbbase = xmalloc (dbsize); | |
35f5886e FF |
2289 | dbroff = DBROFF(pst); |
2290 | foffset = DBFOFF(pst) + dbroff; | |
2670f34d JG |
2291 | base_section_offsets = pst->section_offsets; |
2292 | baseaddr = ANOFFSET (pst->section_offsets, 0); | |
d5931d79 | 2293 | if (bfd_seek (abfd, foffset, L_SET) || |
4090fe1c | 2294 | (bfd_read (dbbase, dbsize, 1, abfd) != dbsize)) |
35f5886e FF |
2295 | { |
2296 | free (dbbase); | |
2297 | error ("can't read DWARF data"); | |
2298 | } | |
2299 | back_to = make_cleanup (free, dbbase); | |
2300 | ||
2301 | /* If there is a line number table associated with this compilation unit | |
13b5a7ff FF |
2302 | then read the size of this fragment in bytes, from the fragment itself. |
2303 | Allocate a buffer for the fragment and read it in for future | |
35f5886e FF |
2304 | processing. */ |
2305 | ||
2306 | lnbase = NULL; | |
2307 | if (LNFOFF (pst)) | |
2308 | { | |
d5931d79 | 2309 | if (bfd_seek (abfd, LNFOFF (pst), L_SET) || |
13b5a7ff FF |
2310 | (bfd_read ((PTR) lnsizedata, sizeof (lnsizedata), 1, abfd) != |
2311 | sizeof (lnsizedata))) | |
35f5886e FF |
2312 | { |
2313 | error ("can't read DWARF line number table size"); | |
2314 | } | |
13b5a7ff FF |
2315 | lnsize = target_to_host (lnsizedata, SIZEOF_LINETBL_LENGTH, |
2316 | GET_UNSIGNED, pst -> objfile); | |
35f5886e | 2317 | lnbase = xmalloc (lnsize); |
d5931d79 | 2318 | if (bfd_seek (abfd, LNFOFF (pst), L_SET) || |
a048c8f5 | 2319 | (bfd_read (lnbase, lnsize, 1, abfd) != lnsize)) |
35f5886e FF |
2320 | { |
2321 | free (lnbase); | |
2322 | error ("can't read DWARF line numbers"); | |
2323 | } | |
2324 | make_cleanup (free, lnbase); | |
2325 | } | |
2326 | ||
4090fe1c | 2327 | process_dies (dbbase, dbbase + dbsize, pst -> objfile); |
35f5886e | 2328 | do_cleanups (back_to); |
1ab3bf1b | 2329 | current_objfile = NULL; |
c701c14c | 2330 | pst -> symtab = pst -> objfile -> symtabs; |
35f5886e FF |
2331 | } |
2332 | ||
2333 | /* | |
2334 | ||
2335 | LOCAL FUNCTION | |
2336 | ||
2337 | psymtab_to_symtab_1 -- do grunt work for building a full symtab entry | |
2338 | ||
2339 | SYNOPSIS | |
2340 | ||
a048c8f5 | 2341 | static void psymtab_to_symtab_1 (struct partial_symtab *pst) |
35f5886e FF |
2342 | |
2343 | DESCRIPTION | |
2344 | ||
2345 | Called once for each partial symbol table entry that needs to be | |
2346 | expanded into a full symbol table entry. | |
2347 | ||
2348 | */ | |
2349 | ||
2350 | static void | |
1ab3bf1b JG |
2351 | psymtab_to_symtab_1 (pst) |
2352 | struct partial_symtab *pst; | |
35f5886e FF |
2353 | { |
2354 | int i; | |
d07734e3 | 2355 | struct cleanup *old_chain; |
35f5886e | 2356 | |
1ab3bf1b | 2357 | if (pst != NULL) |
35f5886e | 2358 | { |
1ab3bf1b | 2359 | if (pst->readin) |
35f5886e | 2360 | { |
318bf84f | 2361 | warning ("psymtab for %s already read in. Shouldn't happen.", |
1ab3bf1b JG |
2362 | pst -> filename); |
2363 | } | |
2364 | else | |
2365 | { | |
2366 | /* Read in all partial symtabs on which this one is dependent */ | |
2367 | for (i = 0; i < pst -> number_of_dependencies; i++) | |
2368 | { | |
2369 | if (!pst -> dependencies[i] -> readin) | |
2370 | { | |
2371 | /* Inform about additional files that need to be read in. */ | |
2372 | if (info_verbose) | |
2373 | { | |
199b2450 | 2374 | fputs_filtered (" ", gdb_stdout); |
1ab3bf1b | 2375 | wrap_here (""); |
199b2450 | 2376 | fputs_filtered ("and ", gdb_stdout); |
1ab3bf1b JG |
2377 | wrap_here (""); |
2378 | printf_filtered ("%s...", | |
2379 | pst -> dependencies[i] -> filename); | |
2380 | wrap_here (""); | |
199b2450 | 2381 | gdb_flush (gdb_stdout); /* Flush output */ |
1ab3bf1b JG |
2382 | } |
2383 | psymtab_to_symtab_1 (pst -> dependencies[i]); | |
2384 | } | |
2385 | } | |
2386 | if (DBLENGTH (pst)) /* Otherwise it's a dummy */ | |
2387 | { | |
d07734e3 FF |
2388 | buildsym_init (); |
2389 | old_chain = make_cleanup (really_free_pendings, 0); | |
c701c14c | 2390 | read_ofile_symtab (pst); |
1ab3bf1b JG |
2391 | if (info_verbose) |
2392 | { | |
2393 | printf_filtered ("%d DIE's, sorting...", diecount); | |
2394 | wrap_here (""); | |
199b2450 | 2395 | gdb_flush (gdb_stdout); |
1ab3bf1b JG |
2396 | } |
2397 | sort_symtab_syms (pst -> symtab); | |
d07734e3 | 2398 | do_cleanups (old_chain); |
1ab3bf1b JG |
2399 | } |
2400 | pst -> readin = 1; | |
35f5886e | 2401 | } |
35f5886e | 2402 | } |
35f5886e FF |
2403 | } |
2404 | ||
2405 | /* | |
2406 | ||
2407 | LOCAL FUNCTION | |
2408 | ||
2409 | dwarf_psymtab_to_symtab -- build a full symtab entry from partial one | |
2410 | ||
2411 | SYNOPSIS | |
2412 | ||
2413 | static void dwarf_psymtab_to_symtab (struct partial_symtab *pst) | |
2414 | ||
2415 | DESCRIPTION | |
2416 | ||
2417 | This is the DWARF support entry point for building a full symbol | |
2418 | table entry from a partial symbol table entry. We are passed a | |
2419 | pointer to the partial symbol table entry that needs to be expanded. | |
2420 | ||
2421 | */ | |
2422 | ||
2423 | static void | |
1ab3bf1b JG |
2424 | dwarf_psymtab_to_symtab (pst) |
2425 | struct partial_symtab *pst; | |
35f5886e | 2426 | { |
7d9884b9 | 2427 | |
1ab3bf1b | 2428 | if (pst != NULL) |
35f5886e | 2429 | { |
1ab3bf1b | 2430 | if (pst -> readin) |
35f5886e | 2431 | { |
318bf84f | 2432 | warning ("psymtab for %s already read in. Shouldn't happen.", |
1ab3bf1b | 2433 | pst -> filename); |
35f5886e | 2434 | } |
1ab3bf1b | 2435 | else |
35f5886e | 2436 | { |
1ab3bf1b JG |
2437 | if (DBLENGTH (pst) || pst -> number_of_dependencies) |
2438 | { | |
2439 | /* Print the message now, before starting serious work, to avoid | |
2440 | disconcerting pauses. */ | |
2441 | if (info_verbose) | |
2442 | { | |
2443 | printf_filtered ("Reading in symbols for %s...", | |
2444 | pst -> filename); | |
199b2450 | 2445 | gdb_flush (gdb_stdout); |
1ab3bf1b JG |
2446 | } |
2447 | ||
2448 | psymtab_to_symtab_1 (pst); | |
2449 | ||
2450 | #if 0 /* FIXME: Check to see what dbxread is doing here and see if | |
2451 | we need to do an equivalent or is this something peculiar to | |
2452 | stabs/a.out format. | |
2453 | Match with global symbols. This only needs to be done once, | |
2454 | after all of the symtabs and dependencies have been read in. | |
2455 | */ | |
2456 | scan_file_globals (pst -> objfile); | |
2457 | #endif | |
2458 | ||
2459 | /* Finish up the verbose info message. */ | |
2460 | if (info_verbose) | |
2461 | { | |
2462 | printf_filtered ("done.\n"); | |
199b2450 | 2463 | gdb_flush (gdb_stdout); |
1ab3bf1b JG |
2464 | } |
2465 | } | |
35f5886e FF |
2466 | } |
2467 | } | |
2468 | } | |
2469 | ||
2470 | /* | |
2471 | ||
715cafcb FF |
2472 | LOCAL FUNCTION |
2473 | ||
2474 | add_enum_psymbol -- add enumeration members to partial symbol table | |
2475 | ||
2476 | DESCRIPTION | |
2477 | ||
2478 | Given pointer to a DIE that is known to be for an enumeration, | |
2479 | extract the symbolic names of the enumeration members and add | |
2480 | partial symbols for them. | |
2481 | */ | |
2482 | ||
2483 | static void | |
1ab3bf1b JG |
2484 | add_enum_psymbol (dip, objfile) |
2485 | struct dieinfo *dip; | |
2486 | struct objfile *objfile; | |
715cafcb FF |
2487 | { |
2488 | char *scan; | |
2489 | char *listend; | |
13b5a7ff FF |
2490 | unsigned short blocksz; |
2491 | int nbytes; | |
715cafcb FF |
2492 | |
2493 | if ((scan = dip -> at_element_list) != NULL) | |
2494 | { | |
2495 | if (dip -> short_element_list) | |
2496 | { | |
13b5a7ff | 2497 | nbytes = attribute_size (AT_short_element_list); |
715cafcb FF |
2498 | } |
2499 | else | |
2500 | { | |
13b5a7ff | 2501 | nbytes = attribute_size (AT_element_list); |
715cafcb | 2502 | } |
13b5a7ff FF |
2503 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); |
2504 | scan += nbytes; | |
2505 | listend = scan + blocksz; | |
715cafcb FF |
2506 | while (scan < listend) |
2507 | { | |
13b5a7ff | 2508 | scan += TARGET_FT_LONG_SIZE (objfile); |
b440b1e9 | 2509 | ADD_PSYMBOL_TO_LIST (scan, strlen (scan), VAR_NAMESPACE, LOC_CONST, |
2e4964ad FF |
2510 | objfile -> static_psymbols, 0, cu_language, |
2511 | objfile); | |
715cafcb FF |
2512 | scan += strlen (scan) + 1; |
2513 | } | |
2514 | } | |
2515 | } | |
2516 | ||
2517 | /* | |
2518 | ||
35f5886e FF |
2519 | LOCAL FUNCTION |
2520 | ||
2521 | add_partial_symbol -- add symbol to partial symbol table | |
2522 | ||
2523 | DESCRIPTION | |
2524 | ||
2525 | Given a DIE, if it is one of the types that we want to | |
2526 | add to a partial symbol table, finish filling in the die info | |
2527 | and then add a partial symbol table entry for it. | |
2528 | ||
95ff889e FF |
2529 | NOTES |
2530 | ||
2531 | The caller must ensure that the DIE has a valid name attribute. | |
35f5886e FF |
2532 | */ |
2533 | ||
2534 | static void | |
1ab3bf1b JG |
2535 | add_partial_symbol (dip, objfile) |
2536 | struct dieinfo *dip; | |
2537 | struct objfile *objfile; | |
35f5886e | 2538 | { |
13b5a7ff | 2539 | switch (dip -> die_tag) |
35f5886e FF |
2540 | { |
2541 | case TAG_global_subroutine: | |
b440b1e9 | 2542 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2543 | VAR_NAMESPACE, LOC_BLOCK, |
2544 | objfile -> global_psymbols, | |
2e4964ad | 2545 | dip -> at_low_pc, cu_language, objfile); |
35f5886e FF |
2546 | break; |
2547 | case TAG_global_variable: | |
b440b1e9 | 2548 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2549 | VAR_NAMESPACE, LOC_STATIC, |
2550 | objfile -> global_psymbols, | |
2e4964ad | 2551 | 0, cu_language, objfile); |
35f5886e FF |
2552 | break; |
2553 | case TAG_subroutine: | |
b440b1e9 | 2554 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2555 | VAR_NAMESPACE, LOC_BLOCK, |
2556 | objfile -> static_psymbols, | |
2e4964ad | 2557 | dip -> at_low_pc, cu_language, objfile); |
35f5886e FF |
2558 | break; |
2559 | case TAG_local_variable: | |
b440b1e9 | 2560 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2561 | VAR_NAMESPACE, LOC_STATIC, |
2562 | objfile -> static_psymbols, | |
2e4964ad | 2563 | 0, cu_language, objfile); |
35f5886e FF |
2564 | break; |
2565 | case TAG_typedef: | |
b440b1e9 | 2566 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2567 | VAR_NAMESPACE, LOC_TYPEDEF, |
2568 | objfile -> static_psymbols, | |
2e4964ad | 2569 | 0, cu_language, objfile); |
35f5886e | 2570 | break; |
95ff889e | 2571 | case TAG_class_type: |
35f5886e FF |
2572 | case TAG_structure_type: |
2573 | case TAG_union_type: | |
95ff889e | 2574 | case TAG_enumeration_type: |
4386eff2 PS |
2575 | /* Do not add opaque aggregate definitions to the psymtab. */ |
2576 | if (!dip -> has_at_byte_size) | |
2577 | break; | |
b440b1e9 | 2578 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2579 | STRUCT_NAMESPACE, LOC_TYPEDEF, |
2580 | objfile -> static_psymbols, | |
2e4964ad | 2581 | 0, cu_language, objfile); |
95ff889e | 2582 | if (cu_language == language_cplus) |
715cafcb | 2583 | { |
95ff889e | 2584 | /* For C++, these implicitly act as typedefs as well. */ |
b440b1e9 | 2585 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
95ff889e | 2586 | VAR_NAMESPACE, LOC_TYPEDEF, |
1ab3bf1b | 2587 | objfile -> static_psymbols, |
2e4964ad | 2588 | 0, cu_language, objfile); |
715cafcb | 2589 | } |
715cafcb | 2590 | break; |
35f5886e FF |
2591 | } |
2592 | } | |
2593 | ||
2594 | /* | |
2595 | ||
2596 | LOCAL FUNCTION | |
2597 | ||
2598 | scan_partial_symbols -- scan DIE's within a single compilation unit | |
2599 | ||
2600 | DESCRIPTION | |
2601 | ||
2602 | Process the DIE's within a single compilation unit, looking for | |
2603 | interesting DIE's that contribute to the partial symbol table entry | |
a679650f | 2604 | for this compilation unit. |
35f5886e | 2605 | |
2d6186f4 FF |
2606 | NOTES |
2607 | ||
a679650f FF |
2608 | There are some DIE's that may appear both at file scope and within |
2609 | the scope of a function. We are only interested in the ones at file | |
2610 | scope, and the only way to tell them apart is to keep track of the | |
2611 | scope. For example, consider the test case: | |
2612 | ||
2613 | static int i; | |
2614 | main () { int j; } | |
2615 | ||
2616 | for which the relevant DWARF segment has the structure: | |
2617 | ||
2618 | 0x51: | |
2619 | 0x23 global subrtn sibling 0x9b | |
2620 | name main | |
2621 | fund_type FT_integer | |
2622 | low_pc 0x800004cc | |
2623 | high_pc 0x800004d4 | |
2624 | ||
2625 | 0x74: | |
2626 | 0x23 local var sibling 0x97 | |
2627 | name j | |
2628 | fund_type FT_integer | |
2629 | location OP_BASEREG 0xe | |
2630 | OP_CONST 0xfffffffc | |
2631 | OP_ADD | |
2632 | 0x97: | |
2633 | 0x4 | |
2634 | ||
2635 | 0x9b: | |
2636 | 0x1d local var sibling 0xb8 | |
2637 | name i | |
2638 | fund_type FT_integer | |
2639 | location OP_ADDR 0x800025dc | |
2640 | ||
2641 | 0xb8: | |
2642 | 0x4 | |
2643 | ||
2644 | We want to include the symbol 'i' in the partial symbol table, but | |
2645 | not the symbol 'j'. In essence, we want to skip all the dies within | |
2646 | the scope of a TAG_global_subroutine DIE. | |
2647 | ||
715cafcb FF |
2648 | Don't attempt to add anonymous structures or unions since they have |
2649 | no name. Anonymous enumerations however are processed, because we | |
2650 | want to extract their member names (the check for a tag name is | |
2651 | done later). | |
2d6186f4 | 2652 | |
715cafcb FF |
2653 | Also, for variables and subroutines, check that this is the place |
2654 | where the actual definition occurs, rather than just a reference | |
2655 | to an external. | |
35f5886e FF |
2656 | */ |
2657 | ||
2658 | static void | |
1ab3bf1b JG |
2659 | scan_partial_symbols (thisdie, enddie, objfile) |
2660 | char *thisdie; | |
2661 | char *enddie; | |
2662 | struct objfile *objfile; | |
35f5886e FF |
2663 | { |
2664 | char *nextdie; | |
a679650f | 2665 | char *temp; |
35f5886e FF |
2666 | struct dieinfo di; |
2667 | ||
2668 | while (thisdie < enddie) | |
2669 | { | |
95967e73 | 2670 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2671 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2672 | { |
2673 | break; | |
2674 | } | |
2675 | else | |
2676 | { | |
13b5a7ff | 2677 | nextdie = thisdie + di.die_length; |
715cafcb FF |
2678 | /* To avoid getting complete die information for every die, we |
2679 | only do it (below) for the cases we are interested in. */ | |
13b5a7ff | 2680 | switch (di.die_tag) |
35f5886e FF |
2681 | { |
2682 | case TAG_global_subroutine: | |
35f5886e | 2683 | case TAG_subroutine: |
a679650f FF |
2684 | completedieinfo (&di, objfile); |
2685 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2686 | { | |
2687 | add_partial_symbol (&di, objfile); | |
2688 | /* If there is a sibling attribute, adjust the nextdie | |
2689 | pointer to skip the entire scope of the subroutine. | |
2690 | Apply some sanity checking to make sure we don't | |
2691 | overrun or underrun the range of remaining DIE's */ | |
2692 | if (di.at_sibling != 0) | |
2693 | { | |
2694 | temp = dbbase + di.at_sibling - dbroff; | |
2695 | if ((temp < thisdie) || (temp >= enddie)) | |
2696 | { | |
51b80b00 FF |
2697 | complain (&bad_die_ref, DIE_ID, DIE_NAME, |
2698 | di.at_sibling); | |
a679650f FF |
2699 | } |
2700 | else | |
2701 | { | |
2702 | nextdie = temp; | |
2703 | } | |
2704 | } | |
2705 | } | |
2706 | break; | |
2d6186f4 | 2707 | case TAG_global_variable: |
35f5886e | 2708 | case TAG_local_variable: |
95967e73 | 2709 | completedieinfo (&di, objfile); |
2d6186f4 FF |
2710 | if (di.at_name && (di.has_at_low_pc || di.at_location)) |
2711 | { | |
1ab3bf1b | 2712 | add_partial_symbol (&di, objfile); |
2d6186f4 FF |
2713 | } |
2714 | break; | |
35f5886e | 2715 | case TAG_typedef: |
95ff889e | 2716 | case TAG_class_type: |
35f5886e FF |
2717 | case TAG_structure_type: |
2718 | case TAG_union_type: | |
95967e73 | 2719 | completedieinfo (&di, objfile); |
2d6186f4 | 2720 | if (di.at_name) |
35f5886e | 2721 | { |
1ab3bf1b | 2722 | add_partial_symbol (&di, objfile); |
35f5886e FF |
2723 | } |
2724 | break; | |
715cafcb | 2725 | case TAG_enumeration_type: |
95967e73 | 2726 | completedieinfo (&di, objfile); |
95ff889e FF |
2727 | if (di.at_name) |
2728 | { | |
2729 | add_partial_symbol (&di, objfile); | |
2730 | } | |
2731 | add_enum_psymbol (&di, objfile); | |
715cafcb | 2732 | break; |
35f5886e FF |
2733 | } |
2734 | } | |
2735 | thisdie = nextdie; | |
2736 | } | |
2737 | } | |
2738 | ||
2739 | /* | |
2740 | ||
2741 | LOCAL FUNCTION | |
2742 | ||
2743 | scan_compilation_units -- build a psymtab entry for each compilation | |
2744 | ||
2745 | DESCRIPTION | |
2746 | ||
2747 | This is the top level dwarf parsing routine for building partial | |
2748 | symbol tables. | |
2749 | ||
2750 | It scans from the beginning of the DWARF table looking for the first | |
2751 | TAG_compile_unit DIE, and then follows the sibling chain to locate | |
2752 | each additional TAG_compile_unit DIE. | |
2753 | ||
2754 | For each TAG_compile_unit DIE it creates a partial symtab structure, | |
2755 | calls a subordinate routine to collect all the compilation unit's | |
2756 | global DIE's, file scope DIEs, typedef DIEs, etc, and then links the | |
2757 | new partial symtab structure into the partial symbol table. It also | |
2758 | records the appropriate information in the partial symbol table entry | |
2759 | to allow the chunk of DIE's and line number table for this compilation | |
2760 | unit to be located and re-read later, to generate a complete symbol | |
2761 | table entry for the compilation unit. | |
2762 | ||
2763 | Thus it effectively partitions up a chunk of DIE's for multiple | |
2764 | compilation units into smaller DIE chunks and line number tables, | |
2765 | and associates them with a partial symbol table entry. | |
2766 | ||
2767 | NOTES | |
2768 | ||
2769 | If any compilation unit has no line number table associated with | |
2770 | it for some reason (a missing at_stmt_list attribute, rather than | |
2771 | just one with a value of zero, which is valid) then we ensure that | |
2772 | the recorded file offset is zero so that the routine which later | |
2773 | reads line number table fragments knows that there is no fragment | |
2774 | to read. | |
2775 | ||
2776 | RETURNS | |
2777 | ||
2778 | Returns no value. | |
2779 | ||
2780 | */ | |
2781 | ||
2782 | static void | |
d5931d79 | 2783 | scan_compilation_units (thisdie, enddie, dbfoff, lnoffset, objfile) |
1ab3bf1b JG |
2784 | char *thisdie; |
2785 | char *enddie; | |
d5931d79 JG |
2786 | file_ptr dbfoff; |
2787 | file_ptr lnoffset; | |
1ab3bf1b | 2788 | struct objfile *objfile; |
35f5886e FF |
2789 | { |
2790 | char *nextdie; | |
2791 | struct dieinfo di; | |
2792 | struct partial_symtab *pst; | |
2793 | int culength; | |
2794 | int curoff; | |
d5931d79 | 2795 | file_ptr curlnoffset; |
35f5886e FF |
2796 | |
2797 | while (thisdie < enddie) | |
2798 | { | |
95967e73 | 2799 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2800 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2801 | { |
2802 | break; | |
2803 | } | |
13b5a7ff | 2804 | else if (di.die_tag != TAG_compile_unit) |
35f5886e | 2805 | { |
13b5a7ff | 2806 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2807 | } |
2808 | else | |
2809 | { | |
95967e73 | 2810 | completedieinfo (&di, objfile); |
95ff889e | 2811 | set_cu_language (&di); |
35f5886e FF |
2812 | if (di.at_sibling != 0) |
2813 | { | |
2814 | nextdie = dbbase + di.at_sibling - dbroff; | |
2815 | } | |
2816 | else | |
2817 | { | |
13b5a7ff | 2818 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2819 | } |
2820 | curoff = thisdie - dbbase; | |
2821 | culength = nextdie - thisdie; | |
2d6186f4 | 2822 | curlnoffset = di.has_at_stmt_list ? lnoffset + di.at_stmt_list : 0; |
1ab3bf1b JG |
2823 | |
2824 | /* First allocate a new partial symbol table structure */ | |
2825 | ||
95ff889e FF |
2826 | pst = start_psymtab_common (objfile, base_section_offsets, |
2827 | di.at_name, di.at_low_pc, | |
1ab3bf1b JG |
2828 | objfile -> global_psymbols.next, |
2829 | objfile -> static_psymbols.next); | |
2830 | ||
2831 | pst -> texthigh = di.at_high_pc; | |
2832 | pst -> read_symtab_private = (char *) | |
2833 | obstack_alloc (&objfile -> psymbol_obstack, | |
2834 | sizeof (struct dwfinfo)); | |
2835 | DBFOFF (pst) = dbfoff; | |
2836 | DBROFF (pst) = curoff; | |
2837 | DBLENGTH (pst) = culength; | |
2838 | LNFOFF (pst) = curlnoffset; | |
2839 | pst -> read_symtab = dwarf_psymtab_to_symtab; | |
2840 | ||
2841 | /* Now look for partial symbols */ | |
2842 | ||
13b5a7ff | 2843 | scan_partial_symbols (thisdie + di.die_length, nextdie, objfile); |
1ab3bf1b JG |
2844 | |
2845 | pst -> n_global_syms = objfile -> global_psymbols.next - | |
2846 | (objfile -> global_psymbols.list + pst -> globals_offset); | |
2847 | pst -> n_static_syms = objfile -> static_psymbols.next - | |
2848 | (objfile -> static_psymbols.list + pst -> statics_offset); | |
2849 | sort_pst_symbols (pst); | |
35f5886e FF |
2850 | /* If there is already a psymtab or symtab for a file of this name, |
2851 | remove it. (If there is a symtab, more drastic things also | |
2852 | happen.) This happens in VxWorks. */ | |
2853 | free_named_symtabs (pst -> filename); | |
35f5886e FF |
2854 | } |
2855 | thisdie = nextdie; | |
2856 | } | |
2857 | } | |
2858 | ||
2859 | /* | |
2860 | ||
2861 | LOCAL FUNCTION | |
2862 | ||
2863 | new_symbol -- make a symbol table entry for a new symbol | |
2864 | ||
2865 | SYNOPSIS | |
2866 | ||
1ab3bf1b JG |
2867 | static struct symbol *new_symbol (struct dieinfo *dip, |
2868 | struct objfile *objfile) | |
35f5886e FF |
2869 | |
2870 | DESCRIPTION | |
2871 | ||
2872 | Given a pointer to a DWARF information entry, figure out if we need | |
2873 | to make a symbol table entry for it, and if so, create a new entry | |
2874 | and return a pointer to it. | |
2875 | */ | |
2876 | ||
2877 | static struct symbol * | |
1ab3bf1b JG |
2878 | new_symbol (dip, objfile) |
2879 | struct dieinfo *dip; | |
2880 | struct objfile *objfile; | |
35f5886e FF |
2881 | { |
2882 | struct symbol *sym = NULL; | |
2883 | ||
2884 | if (dip -> at_name != NULL) | |
2885 | { | |
1ab3bf1b | 2886 | sym = (struct symbol *) obstack_alloc (&objfile -> symbol_obstack, |
35f5886e | 2887 | sizeof (struct symbol)); |
4ed3a9ea | 2888 | memset (sym, 0, sizeof (struct symbol)); |
95ff889e FF |
2889 | SYMBOL_NAME (sym) = create_name (dip -> at_name, |
2890 | &objfile->symbol_obstack); | |
35f5886e FF |
2891 | /* default assumptions */ |
2892 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2893 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2894 | SYMBOL_TYPE (sym) = decode_die_type (dip); | |
2e4964ad FF |
2895 | |
2896 | /* If this symbol is from a C++ compilation, then attempt to cache the | |
2897 | demangled form for future reference. This is a typical time versus | |
2898 | space tradeoff, that was decided in favor of time because it sped up | |
2899 | C++ symbol lookups by a factor of about 20. */ | |
2900 | ||
2901 | SYMBOL_LANGUAGE (sym) = cu_language; | |
7532cf10 | 2902 | SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile -> symbol_obstack); |
13b5a7ff | 2903 | switch (dip -> die_tag) |
35f5886e FF |
2904 | { |
2905 | case TAG_label: | |
4d315a07 | 2906 | SYMBOL_VALUE (sym) = dip -> at_low_pc; |
35f5886e FF |
2907 | SYMBOL_CLASS (sym) = LOC_LABEL; |
2908 | break; | |
2909 | case TAG_global_subroutine: | |
2910 | case TAG_subroutine: | |
4d315a07 | 2911 | SYMBOL_VALUE (sym) = dip -> at_low_pc; |
35f5886e FF |
2912 | SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym)); |
2913 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
13b5a7ff | 2914 | if (dip -> die_tag == TAG_global_subroutine) |
35f5886e FF |
2915 | { |
2916 | add_symbol_to_list (sym, &global_symbols); | |
2917 | } | |
2918 | else | |
2919 | { | |
4d315a07 | 2920 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2921 | } |
2922 | break; | |
2923 | case TAG_global_variable: | |
35f5886e FF |
2924 | if (dip -> at_location != NULL) |
2925 | { | |
2926 | SYMBOL_VALUE (sym) = locval (dip -> at_location); | |
35f5886e FF |
2927 | add_symbol_to_list (sym, &global_symbols); |
2928 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2929 | SYMBOL_VALUE (sym) += baseaddr; | |
2930 | } | |
a5bd5ba6 FF |
2931 | break; |
2932 | case TAG_local_variable: | |
2933 | if (dip -> at_location != NULL) | |
35f5886e | 2934 | { |
a5bd5ba6 | 2935 | SYMBOL_VALUE (sym) = locval (dip -> at_location); |
4d315a07 | 2936 | add_symbol_to_list (sym, list_in_scope); |
a5bd5ba6 FF |
2937 | if (isreg) |
2938 | { | |
2939 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
2940 | } | |
2941 | else if (offreg) | |
35f5886e | 2942 | { |
a1c8d76e JK |
2943 | SYMBOL_CLASS (sym) = LOC_BASEREG; |
2944 | SYMBOL_BASEREG (sym) = basereg; | |
35f5886e FF |
2945 | } |
2946 | else | |
2947 | { | |
2948 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2949 | SYMBOL_VALUE (sym) += baseaddr; | |
2950 | } | |
2951 | } | |
2952 | break; | |
2953 | case TAG_formal_parameter: | |
2954 | if (dip -> at_location != NULL) | |
2955 | { | |
2956 | SYMBOL_VALUE (sym) = locval (dip -> at_location); | |
2957 | } | |
4d315a07 | 2958 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2959 | if (isreg) |
2960 | { | |
2961 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
2962 | } | |
a1c8d76e JK |
2963 | else if (offreg) |
2964 | { | |
2965 | SYMBOL_CLASS (sym) = LOC_BASEREG_ARG; | |
2966 | SYMBOL_BASEREG (sym) = basereg; | |
2967 | } | |
35f5886e FF |
2968 | else |
2969 | { | |
2970 | SYMBOL_CLASS (sym) = LOC_ARG; | |
2971 | } | |
2972 | break; | |
2973 | case TAG_unspecified_parameters: | |
2974 | /* From varargs functions; gdb doesn't seem to have any interest in | |
2975 | this information, so just ignore it for now. (FIXME?) */ | |
2976 | break; | |
95ff889e | 2977 | case TAG_class_type: |
35f5886e FF |
2978 | case TAG_structure_type: |
2979 | case TAG_union_type: | |
2980 | case TAG_enumeration_type: | |
2981 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
2982 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
4d315a07 | 2983 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2984 | break; |
2985 | case TAG_typedef: | |
2986 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
2987 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
4d315a07 | 2988 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2989 | break; |
2990 | default: | |
2991 | /* Not a tag we recognize. Hopefully we aren't processing trash | |
2992 | data, but since we must specifically ignore things we don't | |
2993 | recognize, there is nothing else we should do at this point. */ | |
2994 | break; | |
2995 | } | |
2996 | } | |
2997 | return (sym); | |
2998 | } | |
2999 | ||
3000 | /* | |
3001 | ||
95ff889e FF |
3002 | LOCAL FUNCTION |
3003 | ||
3004 | synthesize_typedef -- make a symbol table entry for a "fake" typedef | |
3005 | ||
3006 | SYNOPSIS | |
3007 | ||
3008 | static void synthesize_typedef (struct dieinfo *dip, | |
3009 | struct objfile *objfile, | |
3010 | struct type *type); | |
3011 | ||
3012 | DESCRIPTION | |
3013 | ||
3014 | Given a pointer to a DWARF information entry, synthesize a typedef | |
3015 | for the name in the DIE, using the specified type. | |
3016 | ||
3017 | This is used for C++ class, structs, unions, and enumerations to | |
3018 | set up the tag name as a type. | |
3019 | ||
3020 | */ | |
3021 | ||
3022 | static void | |
3023 | synthesize_typedef (dip, objfile, type) | |
3024 | struct dieinfo *dip; | |
3025 | struct objfile *objfile; | |
3026 | struct type *type; | |
3027 | { | |
3028 | struct symbol *sym = NULL; | |
3029 | ||
3030 | if (dip -> at_name != NULL) | |
3031 | { | |
3032 | sym = (struct symbol *) | |
3033 | obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symbol)); | |
3034 | memset (sym, 0, sizeof (struct symbol)); | |
3035 | SYMBOL_NAME (sym) = create_name (dip -> at_name, | |
3036 | &objfile->symbol_obstack); | |
7532cf10 | 3037 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); |
95ff889e FF |
3038 | SYMBOL_TYPE (sym) = type; |
3039 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3040 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
3041 | add_symbol_to_list (sym, list_in_scope); | |
3042 | } | |
3043 | } | |
3044 | ||
3045 | /* | |
3046 | ||
35f5886e FF |
3047 | LOCAL FUNCTION |
3048 | ||
3049 | decode_mod_fund_type -- decode a modified fundamental type | |
3050 | ||
3051 | SYNOPSIS | |
3052 | ||
3053 | static struct type *decode_mod_fund_type (char *typedata) | |
3054 | ||
3055 | DESCRIPTION | |
3056 | ||
3057 | Decode a block of data containing a modified fundamental | |
3058 | type specification. TYPEDATA is a pointer to the block, | |
13b5a7ff FF |
3059 | which starts with a length containing the size of the rest |
3060 | of the block. At the end of the block is a fundmental type | |
3061 | code value that gives the fundamental type. Everything | |
35f5886e FF |
3062 | in between are type modifiers. |
3063 | ||
3064 | We simply compute the number of modifiers and call the general | |
3065 | function decode_modified_type to do the actual work. | |
3066 | */ | |
3067 | ||
3068 | static struct type * | |
1ab3bf1b JG |
3069 | decode_mod_fund_type (typedata) |
3070 | char *typedata; | |
35f5886e FF |
3071 | { |
3072 | struct type *typep = NULL; | |
3073 | unsigned short modcount; | |
13b5a7ff | 3074 | int nbytes; |
35f5886e FF |
3075 | |
3076 | /* Get the total size of the block, exclusive of the size itself */ | |
13b5a7ff FF |
3077 | |
3078 | nbytes = attribute_size (AT_mod_fund_type); | |
3079 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3080 | typedata += nbytes; | |
3081 | ||
35f5886e | 3082 | /* Deduct the size of the fundamental type bytes at the end of the block. */ |
13b5a7ff FF |
3083 | |
3084 | modcount -= attribute_size (AT_fund_type); | |
3085 | ||
35f5886e | 3086 | /* Now do the actual decoding */ |
13b5a7ff FF |
3087 | |
3088 | typep = decode_modified_type (typedata, modcount, AT_mod_fund_type); | |
35f5886e FF |
3089 | return (typep); |
3090 | } | |
3091 | ||
3092 | /* | |
3093 | ||
3094 | LOCAL FUNCTION | |
3095 | ||
3096 | decode_mod_u_d_type -- decode a modified user defined type | |
3097 | ||
3098 | SYNOPSIS | |
3099 | ||
3100 | static struct type *decode_mod_u_d_type (char *typedata) | |
3101 | ||
3102 | DESCRIPTION | |
3103 | ||
3104 | Decode a block of data containing a modified user defined | |
3105 | type specification. TYPEDATA is a pointer to the block, | |
3106 | which consists of a two byte length, containing the size | |
3107 | of the rest of the block. At the end of the block is a | |
3108 | four byte value that gives a reference to a user defined type. | |
3109 | Everything in between are type modifiers. | |
3110 | ||
3111 | We simply compute the number of modifiers and call the general | |
3112 | function decode_modified_type to do the actual work. | |
3113 | */ | |
3114 | ||
3115 | static struct type * | |
1ab3bf1b JG |
3116 | decode_mod_u_d_type (typedata) |
3117 | char *typedata; | |
35f5886e FF |
3118 | { |
3119 | struct type *typep = NULL; | |
3120 | unsigned short modcount; | |
13b5a7ff | 3121 | int nbytes; |
35f5886e FF |
3122 | |
3123 | /* Get the total size of the block, exclusive of the size itself */ | |
13b5a7ff FF |
3124 | |
3125 | nbytes = attribute_size (AT_mod_u_d_type); | |
3126 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3127 | typedata += nbytes; | |
3128 | ||
35f5886e | 3129 | /* Deduct the size of the reference type bytes at the end of the block. */ |
13b5a7ff FF |
3130 | |
3131 | modcount -= attribute_size (AT_user_def_type); | |
3132 | ||
35f5886e | 3133 | /* Now do the actual decoding */ |
13b5a7ff FF |
3134 | |
3135 | typep = decode_modified_type (typedata, modcount, AT_mod_u_d_type); | |
35f5886e FF |
3136 | return (typep); |
3137 | } | |
3138 | ||
3139 | /* | |
3140 | ||
3141 | LOCAL FUNCTION | |
3142 | ||
3143 | decode_modified_type -- decode modified user or fundamental type | |
3144 | ||
3145 | SYNOPSIS | |
3146 | ||
1c92ca6f | 3147 | static struct type *decode_modified_type (char *modifiers, |
35f5886e FF |
3148 | unsigned short modcount, int mtype) |
3149 | ||
3150 | DESCRIPTION | |
3151 | ||
3152 | Decode a modified type, either a modified fundamental type or | |
3153 | a modified user defined type. MODIFIERS is a pointer to the | |
3154 | block of bytes that define MODCOUNT modifiers. Immediately | |
3155 | following the last modifier is a short containing the fundamental | |
3156 | type or a long containing the reference to the user defined | |
3157 | type. Which one is determined by MTYPE, which is either | |
3158 | AT_mod_fund_type or AT_mod_u_d_type to indicate what modified | |
3159 | type we are generating. | |
3160 | ||
3161 | We call ourself recursively to generate each modified type,` | |
3162 | until MODCOUNT reaches zero, at which point we have consumed | |
3163 | all the modifiers and generate either the fundamental type or | |
3164 | user defined type. When the recursion unwinds, each modifier | |
3165 | is applied in turn to generate the full modified type. | |
3166 | ||
3167 | NOTES | |
3168 | ||
3169 | If we find a modifier that we don't recognize, and it is not one | |
3170 | of those reserved for application specific use, then we issue a | |
3171 | warning and simply ignore the modifier. | |
3172 | ||
3173 | BUGS | |
3174 | ||
3175 | We currently ignore MOD_const and MOD_volatile. (FIXME) | |
3176 | ||
3177 | */ | |
3178 | ||
3179 | static struct type * | |
1ab3bf1b | 3180 | decode_modified_type (modifiers, modcount, mtype) |
1c92ca6f | 3181 | char *modifiers; |
1ab3bf1b JG |
3182 | unsigned int modcount; |
3183 | int mtype; | |
35f5886e FF |
3184 | { |
3185 | struct type *typep = NULL; | |
3186 | unsigned short fundtype; | |
13b5a7ff | 3187 | DIE_REF die_ref; |
1c92ca6f | 3188 | char modifier; |
13b5a7ff | 3189 | int nbytes; |
35f5886e FF |
3190 | |
3191 | if (modcount == 0) | |
3192 | { | |
3193 | switch (mtype) | |
3194 | { | |
3195 | case AT_mod_fund_type: | |
13b5a7ff FF |
3196 | nbytes = attribute_size (AT_fund_type); |
3197 | fundtype = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3198 | current_objfile); | |
35f5886e FF |
3199 | typep = decode_fund_type (fundtype); |
3200 | break; | |
3201 | case AT_mod_u_d_type: | |
13b5a7ff FF |
3202 | nbytes = attribute_size (AT_user_def_type); |
3203 | die_ref = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3204 | current_objfile); | |
3205 | if ((typep = lookup_utype (die_ref)) == NULL) | |
35f5886e | 3206 | { |
13b5a7ff | 3207 | typep = alloc_utype (die_ref, NULL); |
35f5886e FF |
3208 | } |
3209 | break; | |
3210 | default: | |
51b80b00 | 3211 | complain (&botched_modified_type, DIE_ID, DIE_NAME, mtype); |
bf229b4e | 3212 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
35f5886e FF |
3213 | break; |
3214 | } | |
3215 | } | |
3216 | else | |
3217 | { | |
3218 | modifier = *modifiers++; | |
3219 | typep = decode_modified_type (modifiers, --modcount, mtype); | |
3220 | switch (modifier) | |
3221 | { | |
13b5a7ff FF |
3222 | case MOD_pointer_to: |
3223 | typep = lookup_pointer_type (typep); | |
3224 | break; | |
3225 | case MOD_reference_to: | |
3226 | typep = lookup_reference_type (typep); | |
3227 | break; | |
3228 | case MOD_const: | |
51b80b00 | 3229 | complain (&const_ignored, DIE_ID, DIE_NAME); /* FIXME */ |
13b5a7ff FF |
3230 | break; |
3231 | case MOD_volatile: | |
51b80b00 | 3232 | complain (&volatile_ignored, DIE_ID, DIE_NAME); /* FIXME */ |
13b5a7ff FF |
3233 | break; |
3234 | default: | |
1c92ca6f FF |
3235 | if (!(MOD_lo_user <= (unsigned char) modifier |
3236 | && (unsigned char) modifier <= MOD_hi_user)) | |
13b5a7ff | 3237 | { |
51b80b00 | 3238 | complain (&unknown_type_modifier, DIE_ID, DIE_NAME, modifier); |
13b5a7ff FF |
3239 | } |
3240 | break; | |
35f5886e FF |
3241 | } |
3242 | } | |
3243 | return (typep); | |
3244 | } | |
3245 | ||
3246 | /* | |
3247 | ||
3248 | LOCAL FUNCTION | |
3249 | ||
3250 | decode_fund_type -- translate basic DWARF type to gdb base type | |
3251 | ||
3252 | DESCRIPTION | |
3253 | ||
3254 | Given an integer that is one of the fundamental DWARF types, | |
3255 | translate it to one of the basic internal gdb types and return | |
3256 | a pointer to the appropriate gdb type (a "struct type *"). | |
3257 | ||
3258 | NOTES | |
3259 | ||
85f0a848 FF |
3260 | For robustness, if we are asked to translate a fundamental |
3261 | type that we are unprepared to deal with, we return int so | |
3262 | callers can always depend upon a valid type being returned, | |
3263 | and so gdb may at least do something reasonable by default. | |
3264 | If the type is not in the range of those types defined as | |
3265 | application specific types, we also issue a warning. | |
35f5886e FF |
3266 | */ |
3267 | ||
3268 | static struct type * | |
1ab3bf1b JG |
3269 | decode_fund_type (fundtype) |
3270 | unsigned int fundtype; | |
35f5886e FF |
3271 | { |
3272 | struct type *typep = NULL; | |
3273 | ||
3274 | switch (fundtype) | |
3275 | { | |
3276 | ||
3277 | case FT_void: | |
bf229b4e | 3278 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); |
35f5886e FF |
3279 | break; |
3280 | ||
1ab3bf1b | 3281 | case FT_boolean: /* Was FT_set in AT&T version */ |
bf229b4e | 3282 | typep = dwarf_fundamental_type (current_objfile, FT_BOOLEAN); |
1ab3bf1b JG |
3283 | break; |
3284 | ||
35f5886e | 3285 | case FT_pointer: /* (void *) */ |
bf229b4e | 3286 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); |
1ab3bf1b | 3287 | typep = lookup_pointer_type (typep); |
35f5886e FF |
3288 | break; |
3289 | ||
3290 | case FT_char: | |
bf229b4e | 3291 | typep = dwarf_fundamental_type (current_objfile, FT_CHAR); |
1ab3bf1b JG |
3292 | break; |
3293 | ||
35f5886e | 3294 | case FT_signed_char: |
bf229b4e | 3295 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_CHAR); |
1ab3bf1b JG |
3296 | break; |
3297 | ||
3298 | case FT_unsigned_char: | |
bf229b4e | 3299 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); |
35f5886e FF |
3300 | break; |
3301 | ||
3302 | case FT_short: | |
bf229b4e | 3303 | typep = dwarf_fundamental_type (current_objfile, FT_SHORT); |
1ab3bf1b JG |
3304 | break; |
3305 | ||
35f5886e | 3306 | case FT_signed_short: |
bf229b4e | 3307 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_SHORT); |
1ab3bf1b JG |
3308 | break; |
3309 | ||
3310 | case FT_unsigned_short: | |
bf229b4e | 3311 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); |
35f5886e FF |
3312 | break; |
3313 | ||
3314 | case FT_integer: | |
bf229b4e | 3315 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1ab3bf1b JG |
3316 | break; |
3317 | ||
35f5886e | 3318 | case FT_signed_integer: |
bf229b4e | 3319 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_INTEGER); |
1ab3bf1b JG |
3320 | break; |
3321 | ||
3322 | case FT_unsigned_integer: | |
bf229b4e | 3323 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); |
35f5886e FF |
3324 | break; |
3325 | ||
3326 | case FT_long: | |
bf229b4e | 3327 | typep = dwarf_fundamental_type (current_objfile, FT_LONG); |
1ab3bf1b JG |
3328 | break; |
3329 | ||
35f5886e | 3330 | case FT_signed_long: |
bf229b4e | 3331 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG); |
35f5886e FF |
3332 | break; |
3333 | ||
1ab3bf1b | 3334 | case FT_unsigned_long: |
bf229b4e | 3335 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG); |
35f5886e FF |
3336 | break; |
3337 | ||
1ab3bf1b | 3338 | case FT_long_long: |
bf229b4e | 3339 | typep = dwarf_fundamental_type (current_objfile, FT_LONG_LONG); |
35f5886e | 3340 | break; |
1ab3bf1b JG |
3341 | |
3342 | case FT_signed_long_long: | |
bf229b4e | 3343 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG_LONG); |
35f5886e | 3344 | break; |
1ab3bf1b JG |
3345 | |
3346 | case FT_unsigned_long_long: | |
bf229b4e | 3347 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); |
35f5886e | 3348 | break; |
1ab3bf1b JG |
3349 | |
3350 | case FT_float: | |
bf229b4e | 3351 | typep = dwarf_fundamental_type (current_objfile, FT_FLOAT); |
35f5886e FF |
3352 | break; |
3353 | ||
1ab3bf1b | 3354 | case FT_dbl_prec_float: |
bf229b4e | 3355 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); |
35f5886e FF |
3356 | break; |
3357 | ||
3358 | case FT_ext_prec_float: | |
bf229b4e | 3359 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); |
35f5886e FF |
3360 | break; |
3361 | ||
3362 | case FT_complex: | |
bf229b4e | 3363 | typep = dwarf_fundamental_type (current_objfile, FT_COMPLEX); |
35f5886e FF |
3364 | break; |
3365 | ||
3366 | case FT_dbl_prec_complex: | |
bf229b4e | 3367 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_COMPLEX); |
35f5886e FF |
3368 | break; |
3369 | ||
1ab3bf1b | 3370 | case FT_ext_prec_complex: |
bf229b4e | 3371 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_COMPLEX); |
35f5886e | 3372 | break; |
1ab3bf1b | 3373 | |
35f5886e FF |
3374 | } |
3375 | ||
85f0a848 | 3376 | if (typep == NULL) |
35f5886e | 3377 | { |
85f0a848 FF |
3378 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
3379 | if (!(FT_lo_user <= fundtype && fundtype <= FT_hi_user)) | |
3380 | { | |
51b80b00 | 3381 | complain (&unexpected_fund_type, DIE_ID, DIE_NAME, fundtype); |
85f0a848 | 3382 | } |
35f5886e FF |
3383 | } |
3384 | ||
3385 | return (typep); | |
3386 | } | |
3387 | ||
3388 | /* | |
3389 | ||
3390 | LOCAL FUNCTION | |
3391 | ||
3392 | create_name -- allocate a fresh copy of a string on an obstack | |
3393 | ||
3394 | DESCRIPTION | |
3395 | ||
3396 | Given a pointer to a string and a pointer to an obstack, allocates | |
3397 | a fresh copy of the string on the specified obstack. | |
3398 | ||
3399 | */ | |
3400 | ||
3401 | static char * | |
1ab3bf1b JG |
3402 | create_name (name, obstackp) |
3403 | char *name; | |
3404 | struct obstack *obstackp; | |
35f5886e FF |
3405 | { |
3406 | int length; | |
3407 | char *newname; | |
3408 | ||
3409 | length = strlen (name) + 1; | |
3410 | newname = (char *) obstack_alloc (obstackp, length); | |
4ed3a9ea | 3411 | strcpy (newname, name); |
35f5886e FF |
3412 | return (newname); |
3413 | } | |
3414 | ||
3415 | /* | |
3416 | ||
3417 | LOCAL FUNCTION | |
3418 | ||
3419 | basicdieinfo -- extract the minimal die info from raw die data | |
3420 | ||
3421 | SYNOPSIS | |
3422 | ||
95967e73 FF |
3423 | void basicdieinfo (char *diep, struct dieinfo *dip, |
3424 | struct objfile *objfile) | |
35f5886e FF |
3425 | |
3426 | DESCRIPTION | |
3427 | ||
3428 | Given a pointer to raw DIE data, and a pointer to an instance of a | |
3429 | die info structure, this function extracts the basic information | |
3430 | from the DIE data required to continue processing this DIE, along | |
3431 | with some bookkeeping information about the DIE. | |
3432 | ||
3433 | The information we absolutely must have includes the DIE tag, | |
3434 | and the DIE length. If we need the sibling reference, then we | |
3435 | will have to call completedieinfo() to process all the remaining | |
3436 | DIE information. | |
3437 | ||
3438 | Note that since there is no guarantee that the data is properly | |
3439 | aligned in memory for the type of access required (indirection | |
95967e73 FF |
3440 | through anything other than a char pointer), and there is no |
3441 | guarantee that it is in the same byte order as the gdb host, | |
3442 | we call a function which deals with both alignment and byte | |
3443 | swapping issues. Possibly inefficient, but quite portable. | |
35f5886e FF |
3444 | |
3445 | We also take care of some other basic things at this point, such | |
3446 | as ensuring that the instance of the die info structure starts | |
3447 | out completely zero'd and that curdie is initialized for use | |
3448 | in error reporting if we have a problem with the current die. | |
3449 | ||
3450 | NOTES | |
3451 | ||
3452 | All DIE's must have at least a valid length, thus the minimum | |
13b5a7ff FF |
3453 | DIE size is SIZEOF_DIE_LENGTH. In order to have a valid tag, the |
3454 | DIE size must be at least SIZEOF_DIE_TAG larger, otherwise they | |
35f5886e FF |
3455 | are forced to be TAG_padding DIES. |
3456 | ||
13b5a7ff FF |
3457 | Padding DIES must be at least SIZEOF_DIE_LENGTH in length, implying |
3458 | that if a padding DIE is used for alignment and the amount needed is | |
3459 | less than SIZEOF_DIE_LENGTH, then the padding DIE has to be big | |
3460 | enough to align to the next alignment boundry. | |
4090fe1c FF |
3461 | |
3462 | We do some basic sanity checking here, such as verifying that the | |
3463 | length of the die would not cause it to overrun the recorded end of | |
3464 | the buffer holding the DIE info. If we find a DIE that is either | |
3465 | too small or too large, we force it's length to zero which should | |
3466 | cause the caller to take appropriate action. | |
35f5886e FF |
3467 | */ |
3468 | ||
3469 | static void | |
95967e73 | 3470 | basicdieinfo (dip, diep, objfile) |
1ab3bf1b JG |
3471 | struct dieinfo *dip; |
3472 | char *diep; | |
95967e73 | 3473 | struct objfile *objfile; |
35f5886e FF |
3474 | { |
3475 | curdie = dip; | |
4ed3a9ea | 3476 | memset (dip, 0, sizeof (struct dieinfo)); |
35f5886e | 3477 | dip -> die = diep; |
13b5a7ff FF |
3478 | dip -> die_ref = dbroff + (diep - dbbase); |
3479 | dip -> die_length = target_to_host (diep, SIZEOF_DIE_LENGTH, GET_UNSIGNED, | |
3480 | objfile); | |
4090fe1c FF |
3481 | if ((dip -> die_length < SIZEOF_DIE_LENGTH) || |
3482 | ((diep + dip -> die_length) > (dbbase + dbsize))) | |
35f5886e | 3483 | { |
51b80b00 | 3484 | complain (&malformed_die, DIE_ID, DIE_NAME, dip -> die_length); |
4090fe1c | 3485 | dip -> die_length = 0; |
35f5886e | 3486 | } |
13b5a7ff | 3487 | else if (dip -> die_length < (SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG)) |
35f5886e | 3488 | { |
13b5a7ff | 3489 | dip -> die_tag = TAG_padding; |
35f5886e FF |
3490 | } |
3491 | else | |
3492 | { | |
13b5a7ff FF |
3493 | diep += SIZEOF_DIE_LENGTH; |
3494 | dip -> die_tag = target_to_host (diep, SIZEOF_DIE_TAG, GET_UNSIGNED, | |
3495 | objfile); | |
35f5886e FF |
3496 | } |
3497 | } | |
3498 | ||
3499 | /* | |
3500 | ||
3501 | LOCAL FUNCTION | |
3502 | ||
3503 | completedieinfo -- finish reading the information for a given DIE | |
3504 | ||
3505 | SYNOPSIS | |
3506 | ||
95967e73 | 3507 | void completedieinfo (struct dieinfo *dip, struct objfile *objfile) |
35f5886e FF |
3508 | |
3509 | DESCRIPTION | |
3510 | ||
3511 | Given a pointer to an already partially initialized die info structure, | |
3512 | scan the raw DIE data and finish filling in the die info structure | |
3513 | from the various attributes found. | |
3514 | ||
3515 | Note that since there is no guarantee that the data is properly | |
3516 | aligned in memory for the type of access required (indirection | |
95967e73 FF |
3517 | through anything other than a char pointer), and there is no |
3518 | guarantee that it is in the same byte order as the gdb host, | |
3519 | we call a function which deals with both alignment and byte | |
3520 | swapping issues. Possibly inefficient, but quite portable. | |
35f5886e FF |
3521 | |
3522 | NOTES | |
3523 | ||
3524 | Each time we are called, we increment the diecount variable, which | |
3525 | keeps an approximate count of the number of dies processed for | |
3526 | each compilation unit. This information is presented to the user | |
3527 | if the info_verbose flag is set. | |
3528 | ||
3529 | */ | |
3530 | ||
3531 | static void | |
95967e73 | 3532 | completedieinfo (dip, objfile) |
1ab3bf1b | 3533 | struct dieinfo *dip; |
95967e73 | 3534 | struct objfile *objfile; |
35f5886e FF |
3535 | { |
3536 | char *diep; /* Current pointer into raw DIE data */ | |
3537 | char *end; /* Terminate DIE scan here */ | |
3538 | unsigned short attr; /* Current attribute being scanned */ | |
3539 | unsigned short form; /* Form of the attribute */ | |
13b5a7ff | 3540 | int nbytes; /* Size of next field to read */ |
35f5886e FF |
3541 | |
3542 | diecount++; | |
3543 | diep = dip -> die; | |
13b5a7ff FF |
3544 | end = diep + dip -> die_length; |
3545 | diep += SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG; | |
35f5886e FF |
3546 | while (diep < end) |
3547 | { | |
13b5a7ff FF |
3548 | attr = target_to_host (diep, SIZEOF_ATTRIBUTE, GET_UNSIGNED, objfile); |
3549 | diep += SIZEOF_ATTRIBUTE; | |
3550 | if ((nbytes = attribute_size (attr)) == -1) | |
3551 | { | |
51b80b00 | 3552 | complain (&unknown_attribute_length, DIE_ID, DIE_NAME); |
13b5a7ff FF |
3553 | diep = end; |
3554 | continue; | |
3555 | } | |
35f5886e FF |
3556 | switch (attr) |
3557 | { | |
3558 | case AT_fund_type: | |
13b5a7ff FF |
3559 | dip -> at_fund_type = target_to_host (diep, nbytes, GET_UNSIGNED, |
3560 | objfile); | |
35f5886e FF |
3561 | break; |
3562 | case AT_ordering: | |
13b5a7ff FF |
3563 | dip -> at_ordering = target_to_host (diep, nbytes, GET_UNSIGNED, |
3564 | objfile); | |
35f5886e FF |
3565 | break; |
3566 | case AT_bit_offset: | |
13b5a7ff FF |
3567 | dip -> at_bit_offset = target_to_host (diep, nbytes, GET_UNSIGNED, |
3568 | objfile); | |
35f5886e | 3569 | break; |
35f5886e | 3570 | case AT_sibling: |
13b5a7ff FF |
3571 | dip -> at_sibling = target_to_host (diep, nbytes, GET_UNSIGNED, |
3572 | objfile); | |
35f5886e FF |
3573 | break; |
3574 | case AT_stmt_list: | |
13b5a7ff FF |
3575 | dip -> at_stmt_list = target_to_host (diep, nbytes, GET_UNSIGNED, |
3576 | objfile); | |
2d6186f4 | 3577 | dip -> has_at_stmt_list = 1; |
35f5886e FF |
3578 | break; |
3579 | case AT_low_pc: | |
13b5a7ff FF |
3580 | dip -> at_low_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3581 | objfile); | |
4d315a07 | 3582 | dip -> at_low_pc += baseaddr; |
2d6186f4 | 3583 | dip -> has_at_low_pc = 1; |
35f5886e FF |
3584 | break; |
3585 | case AT_high_pc: | |
13b5a7ff FF |
3586 | dip -> at_high_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3587 | objfile); | |
4d315a07 | 3588 | dip -> at_high_pc += baseaddr; |
35f5886e FF |
3589 | break; |
3590 | case AT_language: | |
13b5a7ff FF |
3591 | dip -> at_language = target_to_host (diep, nbytes, GET_UNSIGNED, |
3592 | objfile); | |
35f5886e FF |
3593 | break; |
3594 | case AT_user_def_type: | |
13b5a7ff FF |
3595 | dip -> at_user_def_type = target_to_host (diep, nbytes, |
3596 | GET_UNSIGNED, objfile); | |
35f5886e FF |
3597 | break; |
3598 | case AT_byte_size: | |
13b5a7ff FF |
3599 | dip -> at_byte_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3600 | objfile); | |
50055e94 | 3601 | dip -> has_at_byte_size = 1; |
35f5886e FF |
3602 | break; |
3603 | case AT_bit_size: | |
13b5a7ff FF |
3604 | dip -> at_bit_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3605 | objfile); | |
35f5886e FF |
3606 | break; |
3607 | case AT_member: | |
13b5a7ff FF |
3608 | dip -> at_member = target_to_host (diep, nbytes, GET_UNSIGNED, |
3609 | objfile); | |
35f5886e FF |
3610 | break; |
3611 | case AT_discr: | |
13b5a7ff FF |
3612 | dip -> at_discr = target_to_host (diep, nbytes, GET_UNSIGNED, |
3613 | objfile); | |
35f5886e | 3614 | break; |
35f5886e FF |
3615 | case AT_location: |
3616 | dip -> at_location = diep; | |
3617 | break; | |
3618 | case AT_mod_fund_type: | |
3619 | dip -> at_mod_fund_type = diep; | |
3620 | break; | |
3621 | case AT_subscr_data: | |
3622 | dip -> at_subscr_data = diep; | |
3623 | break; | |
3624 | case AT_mod_u_d_type: | |
3625 | dip -> at_mod_u_d_type = diep; | |
3626 | break; | |
35f5886e FF |
3627 | case AT_element_list: |
3628 | dip -> at_element_list = diep; | |
768be6e1 FF |
3629 | dip -> short_element_list = 0; |
3630 | break; | |
3631 | case AT_short_element_list: | |
3632 | dip -> at_element_list = diep; | |
3633 | dip -> short_element_list = 1; | |
35f5886e FF |
3634 | break; |
3635 | case AT_discr_value: | |
3636 | dip -> at_discr_value = diep; | |
3637 | break; | |
3638 | case AT_string_length: | |
3639 | dip -> at_string_length = diep; | |
3640 | break; | |
3641 | case AT_name: | |
3642 | dip -> at_name = diep; | |
3643 | break; | |
3644 | case AT_comp_dir: | |
d4902ab0 FF |
3645 | /* For now, ignore any "hostname:" portion, since gdb doesn't |
3646 | know how to deal with it. (FIXME). */ | |
3647 | dip -> at_comp_dir = strrchr (diep, ':'); | |
3648 | if (dip -> at_comp_dir != NULL) | |
3649 | { | |
3650 | dip -> at_comp_dir++; | |
3651 | } | |
3652 | else | |
3653 | { | |
3654 | dip -> at_comp_dir = diep; | |
3655 | } | |
35f5886e FF |
3656 | break; |
3657 | case AT_producer: | |
3658 | dip -> at_producer = diep; | |
3659 | break; | |
35f5886e | 3660 | case AT_start_scope: |
13b5a7ff FF |
3661 | dip -> at_start_scope = target_to_host (diep, nbytes, GET_UNSIGNED, |
3662 | objfile); | |
35f5886e FF |
3663 | break; |
3664 | case AT_stride_size: | |
13b5a7ff FF |
3665 | dip -> at_stride_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3666 | objfile); | |
35f5886e FF |
3667 | break; |
3668 | case AT_src_info: | |
13b5a7ff FF |
3669 | dip -> at_src_info = target_to_host (diep, nbytes, GET_UNSIGNED, |
3670 | objfile); | |
35f5886e FF |
3671 | break; |
3672 | case AT_prototyped: | |
13b5a7ff | 3673 | dip -> at_prototyped = diep; |
35f5886e | 3674 | break; |
35f5886e FF |
3675 | default: |
3676 | /* Found an attribute that we are unprepared to handle. However | |
3677 | it is specifically one of the design goals of DWARF that | |
3678 | consumers should ignore unknown attributes. As long as the | |
3679 | form is one that we recognize (so we know how to skip it), | |
3680 | we can just ignore the unknown attribute. */ | |
3681 | break; | |
3682 | } | |
13b5a7ff | 3683 | form = FORM_FROM_ATTR (attr); |
35f5886e FF |
3684 | switch (form) |
3685 | { | |
3686 | case FORM_DATA2: | |
13b5a7ff | 3687 | diep += 2; |
35f5886e FF |
3688 | break; |
3689 | case FORM_DATA4: | |
13b5a7ff FF |
3690 | case FORM_REF: |
3691 | diep += 4; | |
35f5886e FF |
3692 | break; |
3693 | case FORM_DATA8: | |
13b5a7ff | 3694 | diep += 8; |
35f5886e FF |
3695 | break; |
3696 | case FORM_ADDR: | |
13b5a7ff | 3697 | diep += TARGET_FT_POINTER_SIZE (objfile); |
35f5886e FF |
3698 | break; |
3699 | case FORM_BLOCK2: | |
13b5a7ff | 3700 | diep += 2 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); |
35f5886e FF |
3701 | break; |
3702 | case FORM_BLOCK4: | |
13b5a7ff | 3703 | diep += 4 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); |
35f5886e FF |
3704 | break; |
3705 | case FORM_STRING: | |
3706 | diep += strlen (diep) + 1; | |
3707 | break; | |
3708 | default: | |
51b80b00 | 3709 | complain (&unknown_attribute_form, DIE_ID, DIE_NAME, form); |
35f5886e FF |
3710 | diep = end; |
3711 | break; | |
3712 | } | |
3713 | } | |
3714 | } | |
95967e73 | 3715 | |
13b5a7ff | 3716 | /* |
95967e73 | 3717 | |
13b5a7ff FF |
3718 | LOCAL FUNCTION |
3719 | ||
3720 | target_to_host -- swap in target data to host | |
3721 | ||
3722 | SYNOPSIS | |
3723 | ||
3724 | target_to_host (char *from, int nbytes, int signextend, | |
3725 | struct objfile *objfile) | |
3726 | ||
3727 | DESCRIPTION | |
3728 | ||
3729 | Given pointer to data in target format in FROM, a byte count for | |
3730 | the size of the data in NBYTES, a flag indicating whether or not | |
3731 | the data is signed in SIGNEXTEND, and a pointer to the current | |
3732 | objfile in OBJFILE, convert the data to host format and return | |
3733 | the converted value. | |
3734 | ||
3735 | NOTES | |
3736 | ||
3737 | FIXME: If we read data that is known to be signed, and expect to | |
3738 | use it as signed data, then we need to explicitly sign extend the | |
3739 | result until the bfd library is able to do this for us. | |
3740 | ||
306d27ca DE |
3741 | FIXME: Would a 32 bit target ever need an 8 byte result? |
3742 | ||
13b5a7ff FF |
3743 | */ |
3744 | ||
306d27ca | 3745 | static CORE_ADDR |
13b5a7ff | 3746 | target_to_host (from, nbytes, signextend, objfile) |
95967e73 FF |
3747 | char *from; |
3748 | int nbytes; | |
13b5a7ff | 3749 | int signextend; /* FIXME: Unused */ |
95967e73 FF |
3750 | struct objfile *objfile; |
3751 | { | |
306d27ca | 3752 | CORE_ADDR rtnval; |
95967e73 FF |
3753 | |
3754 | switch (nbytes) | |
3755 | { | |
95967e73 | 3756 | case 8: |
13b5a7ff | 3757 | rtnval = bfd_get_64 (objfile -> obfd, (bfd_byte *) from); |
95967e73 | 3758 | break; |
95967e73 | 3759 | case 4: |
13b5a7ff | 3760 | rtnval = bfd_get_32 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3761 | break; |
3762 | case 2: | |
13b5a7ff | 3763 | rtnval = bfd_get_16 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3764 | break; |
3765 | case 1: | |
13b5a7ff | 3766 | rtnval = bfd_get_8 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3767 | break; |
3768 | default: | |
51b80b00 | 3769 | complain (&no_bfd_get_N, DIE_ID, DIE_NAME, nbytes); |
13b5a7ff | 3770 | rtnval = 0; |
95967e73 FF |
3771 | break; |
3772 | } | |
13b5a7ff | 3773 | return (rtnval); |
95967e73 FF |
3774 | } |
3775 | ||
13b5a7ff FF |
3776 | /* |
3777 | ||
3778 | LOCAL FUNCTION | |
3779 | ||
3780 | attribute_size -- compute size of data for a DWARF attribute | |
3781 | ||
3782 | SYNOPSIS | |
3783 | ||
3784 | static int attribute_size (unsigned int attr) | |
3785 | ||
3786 | DESCRIPTION | |
3787 | ||
3788 | Given a DWARF attribute in ATTR, compute the size of the first | |
3789 | piece of data associated with this attribute and return that | |
3790 | size. | |
3791 | ||
3792 | Returns -1 for unrecognized attributes. | |
3793 | ||
3794 | */ | |
3795 | ||
3796 | static int | |
3797 | attribute_size (attr) | |
3798 | unsigned int attr; | |
3799 | { | |
3800 | int nbytes; /* Size of next data for this attribute */ | |
3801 | unsigned short form; /* Form of the attribute */ | |
3802 | ||
3803 | form = FORM_FROM_ATTR (attr); | |
3804 | switch (form) | |
3805 | { | |
3806 | case FORM_STRING: /* A variable length field is next */ | |
3807 | nbytes = 0; | |
3808 | break; | |
3809 | case FORM_DATA2: /* Next 2 byte field is the data itself */ | |
3810 | case FORM_BLOCK2: /* Next 2 byte field is a block length */ | |
3811 | nbytes = 2; | |
3812 | break; | |
3813 | case FORM_DATA4: /* Next 4 byte field is the data itself */ | |
3814 | case FORM_BLOCK4: /* Next 4 byte field is a block length */ | |
3815 | case FORM_REF: /* Next 4 byte field is a DIE offset */ | |
3816 | nbytes = 4; | |
3817 | break; | |
3818 | case FORM_DATA8: /* Next 8 byte field is the data itself */ | |
3819 | nbytes = 8; | |
3820 | break; | |
3821 | case FORM_ADDR: /* Next field size is target sizeof(void *) */ | |
3822 | nbytes = TARGET_FT_POINTER_SIZE (objfile); | |
3823 | break; | |
3824 | default: | |
51b80b00 | 3825 | complain (&unknown_attribute_form, DIE_ID, DIE_NAME, form); |
13b5a7ff FF |
3826 | nbytes = -1; |
3827 | break; | |
3828 | } | |
3829 | return (nbytes); | |
3830 | } |