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c906108c SS |
1 | /* DWARF debugging format support for GDB. |
2 | Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1998 | |
3 | Free Software Foundation, Inc. | |
4 | Written by Fred Fish at Cygnus Support. Portions based on dbxread.c, | |
5 | mipsread.c, coffread.c, and dwarfread.c from a Data General SVR4 gdb port. | |
6 | ||
c5aa993b | 7 | This file is part of GDB. |
c906108c | 8 | |
c5aa993b JM |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 2 of the License, or | |
12 | (at your option) any later version. | |
c906108c | 13 | |
c5aa993b JM |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
c906108c | 18 | |
c5aa993b JM |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software | |
21 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
c906108c SS |
22 | |
23 | /* | |
24 | ||
c5aa993b JM |
25 | FIXME: Do we need to generate dependencies in partial symtabs? |
26 | (Perhaps we don't need to). | |
c906108c | 27 | |
c5aa993b JM |
28 | FIXME: Resolve minor differences between what information we put in the |
29 | partial symbol table and what dbxread puts in. For example, we don't yet | |
30 | put enum constants there. And dbxread seems to invent a lot of typedefs | |
31 | we never see. Use the new printpsym command to see the partial symbol table | |
32 | contents. | |
c906108c | 33 | |
c5aa993b JM |
34 | FIXME: Figure out a better way to tell gdb about the name of the function |
35 | contain the user's entry point (I.E. main()) | |
c906108c | 36 | |
c5aa993b JM |
37 | FIXME: See other FIXME's and "ifdef 0" scattered throughout the code for |
38 | other things to work on, if you get bored. :-) | |
c906108c | 39 | |
c5aa993b | 40 | */ |
c906108c SS |
41 | |
42 | #include "defs.h" | |
43 | #include "symtab.h" | |
44 | #include "gdbtypes.h" | |
45 | #include "symfile.h" | |
46 | #include "objfiles.h" | |
47 | #include "elf/dwarf.h" | |
48 | #include "buildsym.h" | |
49 | #include "demangle.h" | |
c5aa993b | 50 | #include "expression.h" /* Needed for enum exp_opcode in language.h, sigh... */ |
c906108c SS |
51 | #include "language.h" |
52 | #include "complaints.h" | |
53 | ||
54 | #include <fcntl.h> | |
55 | #include "gdb_string.h" | |
56 | ||
57 | /* Some macros to provide DIE info for complaints. */ | |
58 | ||
59 | #define DIE_ID (curdie!=NULL ? curdie->die_ref : 0) | |
60 | #define DIE_NAME (curdie!=NULL && curdie->at_name!=NULL) ? curdie->at_name : "" | |
61 | ||
62 | /* Complaints that can be issued during DWARF debug info reading. */ | |
63 | ||
64 | struct complaint no_bfd_get_N = | |
65 | { | |
66 | "DIE @ 0x%x \"%s\", no bfd support for %d byte data object", 0, 0 | |
67 | }; | |
68 | ||
69 | struct complaint malformed_die = | |
70 | { | |
71 | "DIE @ 0x%x \"%s\", malformed DIE, bad length (%d bytes)", 0, 0 | |
72 | }; | |
73 | ||
74 | struct complaint bad_die_ref = | |
75 | { | |
76 | "DIE @ 0x%x \"%s\", reference to DIE (0x%x) outside compilation unit", 0, 0 | |
77 | }; | |
78 | ||
79 | struct complaint unknown_attribute_form = | |
80 | { | |
81 | "DIE @ 0x%x \"%s\", unknown attribute form (0x%x)", 0, 0 | |
82 | }; | |
83 | ||
84 | struct complaint unknown_attribute_length = | |
85 | { | |
86 | "DIE @ 0x%x \"%s\", unknown attribute length, skipped remaining attributes", 0, 0 | |
87 | }; | |
88 | ||
89 | struct complaint unexpected_fund_type = | |
90 | { | |
91 | "DIE @ 0x%x \"%s\", unexpected fundamental type 0x%x", 0, 0 | |
92 | }; | |
93 | ||
94 | struct complaint unknown_type_modifier = | |
95 | { | |
96 | "DIE @ 0x%x \"%s\", unknown type modifier %u", 0, 0 | |
97 | }; | |
98 | ||
99 | struct complaint volatile_ignored = | |
100 | { | |
101 | "DIE @ 0x%x \"%s\", type modifier 'volatile' ignored", 0, 0 | |
102 | }; | |
103 | ||
104 | struct complaint const_ignored = | |
105 | { | |
106 | "DIE @ 0x%x \"%s\", type modifier 'const' ignored", 0, 0 | |
107 | }; | |
108 | ||
109 | struct complaint botched_modified_type = | |
110 | { | |
111 | "DIE @ 0x%x \"%s\", botched modified type decoding (mtype 0x%x)", 0, 0 | |
112 | }; | |
113 | ||
114 | struct complaint op_deref2 = | |
115 | { | |
116 | "DIE @ 0x%x \"%s\", OP_DEREF2 address 0x%x not handled", 0, 0 | |
117 | }; | |
118 | ||
119 | struct complaint op_deref4 = | |
120 | { | |
121 | "DIE @ 0x%x \"%s\", OP_DEREF4 address 0x%x not handled", 0, 0 | |
122 | }; | |
123 | ||
124 | struct complaint basereg_not_handled = | |
125 | { | |
126 | "DIE @ 0x%x \"%s\", BASEREG %d not handled", 0, 0 | |
127 | }; | |
128 | ||
129 | struct complaint dup_user_type_allocation = | |
130 | { | |
131 | "DIE @ 0x%x \"%s\", internal error: duplicate user type allocation", 0, 0 | |
132 | }; | |
133 | ||
134 | struct complaint dup_user_type_definition = | |
135 | { | |
136 | "DIE @ 0x%x \"%s\", internal error: duplicate user type definition", 0, 0 | |
137 | }; | |
138 | ||
139 | struct complaint missing_tag = | |
140 | { | |
141 | "DIE @ 0x%x \"%s\", missing class, structure, or union tag", 0, 0 | |
142 | }; | |
143 | ||
144 | struct complaint bad_array_element_type = | |
145 | { | |
146 | "DIE @ 0x%x \"%s\", bad array element type attribute 0x%x", 0, 0 | |
147 | }; | |
148 | ||
149 | struct complaint subscript_data_items = | |
150 | { | |
151 | "DIE @ 0x%x \"%s\", can't decode subscript data items", 0, 0 | |
152 | }; | |
153 | ||
154 | struct complaint unhandled_array_subscript_format = | |
155 | { | |
156 | "DIE @ 0x%x \"%s\", array subscript format 0x%x not handled yet", 0, 0 | |
157 | }; | |
158 | ||
159 | struct complaint unknown_array_subscript_format = | |
160 | { | |
161 | "DIE @ 0x%x \"%s\", unknown array subscript format %x", 0, 0 | |
162 | }; | |
163 | ||
164 | struct complaint not_row_major = | |
165 | { | |
166 | "DIE @ 0x%x \"%s\", array not row major; not handled correctly", 0, 0 | |
167 | }; | |
168 | ||
169 | struct complaint missing_at_name = | |
170 | { | |
171 | "DIE @ 0x%x, AT_name tag missing", 0, 0 | |
172 | }; | |
173 | ||
174 | typedef unsigned int DIE_REF; /* Reference to a DIE */ | |
175 | ||
176 | #ifndef GCC_PRODUCER | |
177 | #define GCC_PRODUCER "GNU C " | |
178 | #endif | |
179 | ||
180 | #ifndef GPLUS_PRODUCER | |
181 | #define GPLUS_PRODUCER "GNU C++ " | |
182 | #endif | |
183 | ||
184 | #ifndef LCC_PRODUCER | |
185 | #define LCC_PRODUCER "NCR C/C++" | |
186 | #endif | |
187 | ||
188 | #ifndef CHILL_PRODUCER | |
189 | #define CHILL_PRODUCER "GNU Chill " | |
190 | #endif | |
191 | ||
192 | /* Provide a default mapping from a DWARF register number to a gdb REGNUM. */ | |
193 | #ifndef DWARF_REG_TO_REGNUM | |
194 | #define DWARF_REG_TO_REGNUM(num) (num) | |
195 | #endif | |
196 | ||
197 | /* Flags to target_to_host() that tell whether or not the data object is | |
198 | expected to be signed. Used, for example, when fetching a signed | |
199 | integer in the target environment which is used as a signed integer | |
200 | in the host environment, and the two environments have different sized | |
201 | ints. In this case, *somebody* has to sign extend the smaller sized | |
202 | int. */ | |
203 | ||
204 | #define GET_UNSIGNED 0 /* No sign extension required */ | |
205 | #define GET_SIGNED 1 /* Sign extension required */ | |
206 | ||
207 | /* Defines for things which are specified in the document "DWARF Debugging | |
208 | Information Format" published by UNIX International, Programming Languages | |
209 | SIG. These defines are based on revision 1.0.0, Jan 20, 1992. */ | |
210 | ||
211 | #define SIZEOF_DIE_LENGTH 4 | |
212 | #define SIZEOF_DIE_TAG 2 | |
213 | #define SIZEOF_ATTRIBUTE 2 | |
214 | #define SIZEOF_FORMAT_SPECIFIER 1 | |
215 | #define SIZEOF_FMT_FT 2 | |
216 | #define SIZEOF_LINETBL_LENGTH 4 | |
217 | #define SIZEOF_LINETBL_LINENO 4 | |
218 | #define SIZEOF_LINETBL_STMT 2 | |
219 | #define SIZEOF_LINETBL_DELTA 4 | |
220 | #define SIZEOF_LOC_ATOM_CODE 1 | |
221 | ||
222 | #define FORM_FROM_ATTR(attr) ((attr) & 0xF) /* Implicitly specified */ | |
223 | ||
224 | /* Macros that return the sizes of various types of data in the target | |
225 | environment. | |
226 | ||
227 | FIXME: Currently these are just compile time constants (as they are in | |
228 | other parts of gdb as well). They need to be able to get the right size | |
229 | either from the bfd or possibly from the DWARF info. It would be nice if | |
230 | the DWARF producer inserted DIES that describe the fundamental types in | |
231 | the target environment into the DWARF info, similar to the way dbx stabs | |
232 | producers produce information about their fundamental types. */ | |
233 | ||
234 | #define TARGET_FT_POINTER_SIZE(objfile) (TARGET_PTR_BIT / TARGET_CHAR_BIT) | |
235 | #define TARGET_FT_LONG_SIZE(objfile) (TARGET_LONG_BIT / TARGET_CHAR_BIT) | |
236 | ||
237 | /* The Amiga SVR4 header file <dwarf.h> defines AT_element_list as a | |
238 | FORM_BLOCK2, and this is the value emitted by the AT&T compiler. | |
239 | However, the Issue 2 DWARF specification from AT&T defines it as | |
240 | a FORM_BLOCK4, as does the latest specification from UI/PLSIG. | |
241 | For backwards compatibility with the AT&T compiler produced executables | |
242 | we define AT_short_element_list for this variant. */ | |
243 | ||
244 | #define AT_short_element_list (0x00f0|FORM_BLOCK2) | |
245 | ||
246 | /* External variables referenced. */ | |
247 | ||
c5aa993b JM |
248 | extern int info_verbose; /* From main.c; nonzero => verbose */ |
249 | extern char *warning_pre_print; /* From utils.c */ | |
c906108c SS |
250 | |
251 | /* The DWARF debugging information consists of two major pieces, | |
252 | one is a block of DWARF Information Entries (DIE's) and the other | |
253 | is a line number table. The "struct dieinfo" structure contains | |
254 | the information for a single DIE, the one currently being processed. | |
255 | ||
256 | In order to make it easier to randomly access the attribute fields | |
257 | of the current DIE, which are specifically unordered within the DIE, | |
258 | each DIE is scanned and an instance of the "struct dieinfo" | |
259 | structure is initialized. | |
260 | ||
261 | Initialization is done in two levels. The first, done by basicdieinfo(), | |
262 | just initializes those fields that are vital to deciding whether or not | |
263 | to use this DIE, how to skip past it, etc. The second, done by the | |
264 | function completedieinfo(), fills in the rest of the information. | |
265 | ||
266 | Attributes which have block forms are not interpreted at the time | |
267 | the DIE is scanned, instead we just save pointers to the start | |
268 | of their value fields. | |
269 | ||
270 | Some fields have a flag <name>_p that is set when the value of the | |
271 | field is valid (I.E. we found a matching attribute in the DIE). Since | |
272 | we may want to test for the presence of some attributes in the DIE, | |
273 | such as AT_low_pc, without restricting the values of the field, | |
274 | we need someway to note that we found such an attribute. | |
c5aa993b | 275 | |
c906108c | 276 | */ |
c5aa993b | 277 | |
c906108c SS |
278 | typedef char BLOCK; |
279 | ||
c5aa993b JM |
280 | struct dieinfo |
281 | { | |
282 | char *die; /* Pointer to the raw DIE data */ | |
283 | unsigned long die_length; /* Length of the raw DIE data */ | |
284 | DIE_REF die_ref; /* Offset of this DIE */ | |
285 | unsigned short die_tag; /* Tag for this DIE */ | |
286 | unsigned long at_padding; | |
287 | unsigned long at_sibling; | |
288 | BLOCK *at_location; | |
289 | char *at_name; | |
290 | unsigned short at_fund_type; | |
291 | BLOCK *at_mod_fund_type; | |
292 | unsigned long at_user_def_type; | |
293 | BLOCK *at_mod_u_d_type; | |
294 | unsigned short at_ordering; | |
295 | BLOCK *at_subscr_data; | |
296 | unsigned long at_byte_size; | |
297 | unsigned short at_bit_offset; | |
298 | unsigned long at_bit_size; | |
299 | BLOCK *at_element_list; | |
300 | unsigned long at_stmt_list; | |
301 | CORE_ADDR at_low_pc; | |
302 | CORE_ADDR at_high_pc; | |
303 | unsigned long at_language; | |
304 | unsigned long at_member; | |
305 | unsigned long at_discr; | |
306 | BLOCK *at_discr_value; | |
307 | BLOCK *at_string_length; | |
308 | char *at_comp_dir; | |
309 | char *at_producer; | |
310 | unsigned long at_start_scope; | |
311 | unsigned long at_stride_size; | |
312 | unsigned long at_src_info; | |
313 | char *at_prototyped; | |
314 | unsigned int has_at_low_pc:1; | |
315 | unsigned int has_at_stmt_list:1; | |
316 | unsigned int has_at_byte_size:1; | |
317 | unsigned int short_element_list:1; | |
318 | ||
319 | /* Kludge to identify register variables */ | |
320 | ||
321 | unsigned int isreg; | |
322 | ||
323 | /* Kludge to identify optimized out variables */ | |
324 | ||
325 | unsigned int optimized_out; | |
326 | ||
327 | /* Kludge to identify basereg references. | |
328 | Nonzero if we have an offset relative to a basereg. */ | |
329 | ||
330 | unsigned int offreg; | |
331 | ||
332 | /* Kludge to identify which base register is it relative to. */ | |
333 | ||
334 | unsigned int basereg; | |
335 | }; | |
c906108c | 336 | |
c5aa993b | 337 | static int diecount; /* Approximate count of dies for compilation unit */ |
c906108c SS |
338 | static struct dieinfo *curdie; /* For warnings and such */ |
339 | ||
c5aa993b JM |
340 | static char *dbbase; /* Base pointer to dwarf info */ |
341 | static int dbsize; /* Size of dwarf info in bytes */ | |
342 | static int dbroff; /* Relative offset from start of .debug section */ | |
343 | static char *lnbase; /* Base pointer to line section */ | |
c906108c SS |
344 | |
345 | /* This value is added to each symbol value. FIXME: Generalize to | |
346 | the section_offsets structure used by dbxread (once this is done, | |
347 | pass the appropriate section number to end_symtab). */ | |
348 | static CORE_ADDR baseaddr; /* Add to each symbol value */ | |
349 | ||
350 | /* The section offsets used in the current psymtab or symtab. FIXME, | |
351 | only used to pass one value (baseaddr) at the moment. */ | |
352 | static struct section_offsets *base_section_offsets; | |
353 | ||
354 | /* We put a pointer to this structure in the read_symtab_private field | |
355 | of the psymtab. */ | |
356 | ||
c5aa993b JM |
357 | struct dwfinfo |
358 | { | |
359 | /* Always the absolute file offset to the start of the ".debug" | |
360 | section for the file containing the DIE's being accessed. */ | |
361 | file_ptr dbfoff; | |
362 | /* Relative offset from the start of the ".debug" section to the | |
363 | first DIE to be accessed. When building the partial symbol | |
364 | table, this value will be zero since we are accessing the | |
365 | entire ".debug" section. When expanding a partial symbol | |
366 | table entry, this value will be the offset to the first | |
367 | DIE for the compilation unit containing the symbol that | |
368 | triggers the expansion. */ | |
369 | int dbroff; | |
370 | /* The size of the chunk of DIE's being examined, in bytes. */ | |
371 | int dblength; | |
372 | /* The absolute file offset to the line table fragment. Ignored | |
373 | when building partial symbol tables, but used when expanding | |
374 | them, and contains the absolute file offset to the fragment | |
375 | of the ".line" section containing the line numbers for the | |
376 | current compilation unit. */ | |
377 | file_ptr lnfoff; | |
378 | }; | |
c906108c SS |
379 | |
380 | #define DBFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbfoff) | |
381 | #define DBROFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbroff) | |
382 | #define DBLENGTH(p) (((struct dwfinfo *)((p)->read_symtab_private))->dblength) | |
383 | #define LNFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->lnfoff) | |
384 | ||
385 | /* The generic symbol table building routines have separate lists for | |
386 | file scope symbols and all all other scopes (local scopes). So | |
387 | we need to select the right one to pass to add_symbol_to_list(). | |
388 | We do it by keeping a pointer to the correct list in list_in_scope. | |
389 | ||
390 | FIXME: The original dwarf code just treated the file scope as the first | |
391 | local scope, and all other local scopes as nested local scopes, and worked | |
392 | fine. Check to see if we really need to distinguish these in buildsym.c */ | |
393 | ||
394 | struct pending **list_in_scope = &file_symbols; | |
395 | ||
396 | /* DIES which have user defined types or modified user defined types refer to | |
397 | other DIES for the type information. Thus we need to associate the offset | |
398 | of a DIE for a user defined type with a pointer to the type information. | |
399 | ||
400 | Originally this was done using a simple but expensive algorithm, with an | |
401 | array of unsorted structures, each containing an offset/type-pointer pair. | |
402 | This array was scanned linearly each time a lookup was done. The result | |
403 | was that gdb was spending over half it's startup time munging through this | |
404 | array of pointers looking for a structure that had the right offset member. | |
405 | ||
406 | The second attempt used the same array of structures, but the array was | |
407 | sorted using qsort each time a new offset/type was recorded, and a binary | |
408 | search was used to find the type pointer for a given DIE offset. This was | |
409 | even slower, due to the overhead of sorting the array each time a new | |
410 | offset/type pair was entered. | |
411 | ||
412 | The third attempt uses a fixed size array of type pointers, indexed by a | |
413 | value derived from the DIE offset. Since the minimum DIE size is 4 bytes, | |
414 | we can divide any DIE offset by 4 to obtain a unique index into this fixed | |
415 | size array. Since each element is a 4 byte pointer, it takes exactly as | |
416 | much memory to hold this array as to hold the DWARF info for a given | |
417 | compilation unit. But it gets freed as soon as we are done with it. | |
418 | This has worked well in practice, as a reasonable tradeoff between memory | |
419 | consumption and speed, without having to resort to much more complicated | |
420 | algorithms. */ | |
421 | ||
422 | static struct type **utypes; /* Pointer to array of user type pointers */ | |
423 | static int numutypes; /* Max number of user type pointers */ | |
424 | ||
425 | /* Maintain an array of referenced fundamental types for the current | |
426 | compilation unit being read. For DWARF version 1, we have to construct | |
427 | the fundamental types on the fly, since no information about the | |
428 | fundamental types is supplied. Each such fundamental type is created by | |
429 | calling a language dependent routine to create the type, and then a | |
430 | pointer to that type is then placed in the array at the index specified | |
431 | by it's FT_<TYPENAME> value. The array has a fixed size set by the | |
432 | FT_NUM_MEMBERS compile time constant, which is the number of predefined | |
433 | fundamental types gdb knows how to construct. */ | |
434 | ||
c5aa993b | 435 | static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */ |
c906108c SS |
436 | |
437 | /* Record the language for the compilation unit which is currently being | |
438 | processed. We know it once we have seen the TAG_compile_unit DIE, | |
439 | and we need it while processing the DIE's for that compilation unit. | |
440 | It is eventually saved in the symtab structure, but we don't finalize | |
441 | the symtab struct until we have processed all the DIE's for the | |
442 | compilation unit. We also need to get and save a pointer to the | |
443 | language struct for this language, so we can call the language | |
444 | dependent routines for doing things such as creating fundamental | |
445 | types. */ | |
446 | ||
447 | static enum language cu_language; | |
448 | static const struct language_defn *cu_language_defn; | |
449 | ||
450 | /* Forward declarations of static functions so we don't have to worry | |
451 | about ordering within this file. */ | |
452 | ||
a14ed312 | 453 | static void free_utypes (PTR); |
c906108c | 454 | |
a14ed312 | 455 | static int attribute_size (unsigned int); |
c906108c | 456 | |
a14ed312 | 457 | static CORE_ADDR target_to_host (char *, int, int, struct objfile *); |
c906108c | 458 | |
a14ed312 | 459 | static void add_enum_psymbol (struct dieinfo *, struct objfile *); |
c906108c | 460 | |
a14ed312 | 461 | static void handle_producer (char *); |
c906108c SS |
462 | |
463 | static void | |
a14ed312 | 464 | read_file_scope (struct dieinfo *, char *, char *, struct objfile *); |
c906108c SS |
465 | |
466 | static void | |
a14ed312 | 467 | read_func_scope (struct dieinfo *, char *, char *, struct objfile *); |
c906108c SS |
468 | |
469 | static void | |
a14ed312 | 470 | read_lexical_block_scope (struct dieinfo *, char *, char *, struct objfile *); |
c906108c | 471 | |
a14ed312 | 472 | static void scan_partial_symbols (char *, char *, struct objfile *); |
c906108c SS |
473 | |
474 | static void | |
a14ed312 | 475 | scan_compilation_units (char *, char *, file_ptr, file_ptr, struct objfile *); |
c906108c | 476 | |
a14ed312 | 477 | static void add_partial_symbol (struct dieinfo *, struct objfile *); |
c906108c | 478 | |
a14ed312 | 479 | static void basicdieinfo (struct dieinfo *, char *, struct objfile *); |
c906108c | 480 | |
a14ed312 | 481 | static void completedieinfo (struct dieinfo *, struct objfile *); |
c906108c | 482 | |
a14ed312 | 483 | static void dwarf_psymtab_to_symtab (struct partial_symtab *); |
c906108c | 484 | |
a14ed312 | 485 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 486 | |
a14ed312 | 487 | static void read_ofile_symtab (struct partial_symtab *); |
c906108c | 488 | |
a14ed312 | 489 | static void process_dies (char *, char *, struct objfile *); |
c906108c SS |
490 | |
491 | static void | |
a14ed312 | 492 | read_structure_scope (struct dieinfo *, char *, char *, struct objfile *); |
c906108c | 493 | |
a14ed312 | 494 | static struct type *decode_array_element_type (char *); |
c906108c | 495 | |
a14ed312 | 496 | static struct type *decode_subscript_data_item (char *, char *); |
c906108c | 497 | |
a14ed312 | 498 | static void dwarf_read_array_type (struct dieinfo *); |
c906108c | 499 | |
a14ed312 | 500 | static void read_tag_pointer_type (struct dieinfo *dip); |
c906108c | 501 | |
a14ed312 | 502 | static void read_tag_string_type (struct dieinfo *dip); |
c906108c | 503 | |
a14ed312 | 504 | static void read_subroutine_type (struct dieinfo *, char *, char *); |
c906108c SS |
505 | |
506 | static void | |
a14ed312 | 507 | read_enumeration (struct dieinfo *, char *, char *, struct objfile *); |
c906108c | 508 | |
a14ed312 KB |
509 | static struct type *struct_type (struct dieinfo *, char *, char *, |
510 | struct objfile *); | |
c906108c | 511 | |
a14ed312 | 512 | static struct type *enum_type (struct dieinfo *, struct objfile *); |
c906108c | 513 | |
a14ed312 | 514 | static void decode_line_numbers (char *); |
c906108c | 515 | |
a14ed312 | 516 | static struct type *decode_die_type (struct dieinfo *); |
c906108c | 517 | |
a14ed312 | 518 | static struct type *decode_mod_fund_type (char *); |
c906108c | 519 | |
a14ed312 | 520 | static struct type *decode_mod_u_d_type (char *); |
c906108c | 521 | |
a14ed312 | 522 | static struct type *decode_modified_type (char *, unsigned int, int); |
c906108c | 523 | |
a14ed312 | 524 | static struct type *decode_fund_type (unsigned int); |
c906108c | 525 | |
a14ed312 | 526 | static char *create_name (char *, struct obstack *); |
c906108c | 527 | |
a14ed312 | 528 | static struct type *lookup_utype (DIE_REF); |
c906108c | 529 | |
a14ed312 | 530 | static struct type *alloc_utype (DIE_REF, struct type *); |
c906108c | 531 | |
a14ed312 | 532 | static struct symbol *new_symbol (struct dieinfo *, struct objfile *); |
c906108c SS |
533 | |
534 | static void | |
a14ed312 | 535 | synthesize_typedef (struct dieinfo *, struct objfile *, struct type *); |
c906108c | 536 | |
a14ed312 | 537 | static int locval (struct dieinfo *); |
c906108c | 538 | |
a14ed312 | 539 | static void set_cu_language (struct dieinfo *); |
c906108c | 540 | |
a14ed312 | 541 | static struct type *dwarf_fundamental_type (struct objfile *, int); |
c906108c SS |
542 | |
543 | ||
544 | /* | |
545 | ||
c5aa993b | 546 | LOCAL FUNCTION |
c906108c | 547 | |
c5aa993b | 548 | dwarf_fundamental_type -- lookup or create a fundamental type |
c906108c | 549 | |
c5aa993b | 550 | SYNOPSIS |
c906108c | 551 | |
c5aa993b JM |
552 | struct type * |
553 | dwarf_fundamental_type (struct objfile *objfile, int typeid) | |
c906108c | 554 | |
c5aa993b | 555 | DESCRIPTION |
c906108c | 556 | |
c5aa993b JM |
557 | DWARF version 1 doesn't supply any fundamental type information, |
558 | so gdb has to construct such types. It has a fixed number of | |
559 | fundamental types that it knows how to construct, which is the | |
560 | union of all types that it knows how to construct for all languages | |
561 | that it knows about. These are enumerated in gdbtypes.h. | |
c906108c | 562 | |
c5aa993b JM |
563 | As an example, assume we find a DIE that references a DWARF |
564 | fundamental type of FT_integer. We first look in the ftypes | |
565 | array to see if we already have such a type, indexed by the | |
566 | gdb internal value of FT_INTEGER. If so, we simply return a | |
567 | pointer to that type. If not, then we ask an appropriate | |
568 | language dependent routine to create a type FT_INTEGER, using | |
569 | defaults reasonable for the current target machine, and install | |
570 | that type in ftypes for future reference. | |
c906108c | 571 | |
c5aa993b | 572 | RETURNS |
c906108c | 573 | |
c5aa993b | 574 | Pointer to a fundamental type. |
c906108c | 575 | |
c5aa993b | 576 | */ |
c906108c SS |
577 | |
578 | static struct type * | |
579 | dwarf_fundamental_type (objfile, typeid) | |
580 | struct objfile *objfile; | |
581 | int typeid; | |
582 | { | |
583 | if (typeid < 0 || typeid >= FT_NUM_MEMBERS) | |
584 | { | |
585 | error ("internal error - invalid fundamental type id %d", typeid); | |
586 | } | |
587 | ||
588 | /* Look for this particular type in the fundamental type vector. If one is | |
589 | not found, create and install one appropriate for the current language | |
590 | and the current target machine. */ | |
591 | ||
592 | if (ftypes[typeid] == NULL) | |
593 | { | |
c5aa993b | 594 | ftypes[typeid] = cu_language_defn->la_fund_type (objfile, typeid); |
c906108c SS |
595 | } |
596 | ||
597 | return (ftypes[typeid]); | |
598 | } | |
599 | ||
600 | /* | |
601 | ||
c5aa993b | 602 | LOCAL FUNCTION |
c906108c | 603 | |
c5aa993b | 604 | set_cu_language -- set local copy of language for compilation unit |
c906108c | 605 | |
c5aa993b | 606 | SYNOPSIS |
c906108c | 607 | |
c5aa993b JM |
608 | void |
609 | set_cu_language (struct dieinfo *dip) | |
c906108c | 610 | |
c5aa993b | 611 | DESCRIPTION |
c906108c | 612 | |
c5aa993b JM |
613 | Decode the language attribute for a compilation unit DIE and |
614 | remember what the language was. We use this at various times | |
615 | when processing DIE's for a given compilation unit. | |
c906108c | 616 | |
c5aa993b | 617 | RETURNS |
c906108c | 618 | |
c5aa993b | 619 | No return value. |
c906108c SS |
620 | |
621 | */ | |
622 | ||
623 | static void | |
624 | set_cu_language (dip) | |
625 | struct dieinfo *dip; | |
626 | { | |
c5aa993b | 627 | switch (dip->at_language) |
c906108c | 628 | { |
c5aa993b JM |
629 | case LANG_C89: |
630 | case LANG_C: | |
631 | cu_language = language_c; | |
632 | break; | |
633 | case LANG_C_PLUS_PLUS: | |
634 | cu_language = language_cplus; | |
635 | break; | |
636 | case LANG_CHILL: | |
637 | cu_language = language_chill; | |
638 | break; | |
639 | case LANG_MODULA2: | |
640 | cu_language = language_m2; | |
641 | break; | |
642 | case LANG_FORTRAN77: | |
643 | case LANG_FORTRAN90: | |
644 | cu_language = language_fortran; | |
645 | break; | |
646 | case LANG_ADA83: | |
647 | case LANG_COBOL74: | |
648 | case LANG_COBOL85: | |
649 | case LANG_PASCAL83: | |
650 | /* We don't know anything special about these yet. */ | |
651 | cu_language = language_unknown; | |
652 | break; | |
653 | default: | |
654 | /* If no at_language, try to deduce one from the filename */ | |
655 | cu_language = deduce_language_from_filename (dip->at_name); | |
656 | break; | |
c906108c SS |
657 | } |
658 | cu_language_defn = language_def (cu_language); | |
659 | } | |
660 | ||
661 | /* | |
662 | ||
c5aa993b | 663 | GLOBAL FUNCTION |
c906108c | 664 | |
c5aa993b | 665 | dwarf_build_psymtabs -- build partial symtabs from DWARF debug info |
c906108c | 666 | |
c5aa993b | 667 | SYNOPSIS |
c906108c | 668 | |
c5aa993b | 669 | void dwarf_build_psymtabs (struct objfile *objfile, |
c5aa993b JM |
670 | int mainline, file_ptr dbfoff, unsigned int dbfsize, |
671 | file_ptr lnoffset, unsigned int lnsize) | |
c906108c | 672 | |
c5aa993b | 673 | DESCRIPTION |
c906108c | 674 | |
c5aa993b JM |
675 | This function is called upon to build partial symtabs from files |
676 | containing DIE's (Dwarf Information Entries) and DWARF line numbers. | |
c906108c | 677 | |
c5aa993b JM |
678 | It is passed a bfd* containing the DIES |
679 | and line number information, the corresponding filename for that | |
680 | file, a base address for relocating the symbols, a flag indicating | |
681 | whether or not this debugging information is from a "main symbol | |
682 | table" rather than a shared library or dynamically linked file, | |
683 | and file offset/size pairs for the DIE information and line number | |
684 | information. | |
c906108c | 685 | |
c5aa993b | 686 | RETURNS |
c906108c | 687 | |
c5aa993b | 688 | No return value. |
c906108c SS |
689 | |
690 | */ | |
691 | ||
692 | void | |
d4f3574e | 693 | dwarf_build_psymtabs (objfile, mainline, dbfoff, dbfsize, |
c906108c SS |
694 | lnoffset, lnsize) |
695 | struct objfile *objfile; | |
c906108c SS |
696 | int mainline; |
697 | file_ptr dbfoff; | |
698 | unsigned int dbfsize; | |
699 | file_ptr lnoffset; | |
700 | unsigned int lnsize; | |
701 | { | |
702 | bfd *abfd = objfile->obfd; | |
703 | struct cleanup *back_to; | |
c5aa993b | 704 | |
c906108c SS |
705 | current_objfile = objfile; |
706 | dbsize = dbfsize; | |
707 | dbbase = xmalloc (dbsize); | |
708 | dbroff = 0; | |
709 | if ((bfd_seek (abfd, dbfoff, SEEK_SET) != 0) || | |
710 | (bfd_read (dbbase, dbsize, 1, abfd) != dbsize)) | |
711 | { | |
712 | free (dbbase); | |
713 | error ("can't read DWARF data from '%s'", bfd_get_filename (abfd)); | |
714 | } | |
715 | back_to = make_cleanup (free, dbbase); | |
c5aa993b | 716 | |
c906108c SS |
717 | /* If we are reinitializing, or if we have never loaded syms yet, init. |
718 | Since we have no idea how many DIES we are looking at, we just guess | |
719 | some arbitrary value. */ | |
c5aa993b JM |
720 | |
721 | if (mainline || objfile->global_psymbols.size == 0 || | |
722 | objfile->static_psymbols.size == 0) | |
c906108c SS |
723 | { |
724 | init_psymbol_list (objfile, 1024); | |
725 | } | |
c5aa993b | 726 | |
c906108c SS |
727 | /* Save the relocation factor where everybody can see it. */ |
728 | ||
d4f3574e SS |
729 | base_section_offsets = objfile->section_offsets; |
730 | baseaddr = ANOFFSET (objfile->section_offsets, 0); | |
c906108c SS |
731 | |
732 | /* Follow the compilation unit sibling chain, building a partial symbol | |
733 | table entry for each one. Save enough information about each compilation | |
734 | unit to locate the full DWARF information later. */ | |
c5aa993b | 735 | |
c906108c | 736 | scan_compilation_units (dbbase, dbbase + dbsize, dbfoff, lnoffset, objfile); |
c5aa993b | 737 | |
c906108c SS |
738 | do_cleanups (back_to); |
739 | current_objfile = NULL; | |
740 | } | |
741 | ||
742 | /* | |
743 | ||
c5aa993b | 744 | LOCAL FUNCTION |
c906108c | 745 | |
c5aa993b | 746 | read_lexical_block_scope -- process all dies in a lexical block |
c906108c | 747 | |
c5aa993b | 748 | SYNOPSIS |
c906108c | 749 | |
c5aa993b JM |
750 | static void read_lexical_block_scope (struct dieinfo *dip, |
751 | char *thisdie, char *enddie) | |
c906108c | 752 | |
c5aa993b | 753 | DESCRIPTION |
c906108c | 754 | |
c5aa993b JM |
755 | Process all the DIES contained within a lexical block scope. |
756 | Start a new scope, process the dies, and then close the scope. | |
c906108c SS |
757 | |
758 | */ | |
759 | ||
760 | static void | |
761 | read_lexical_block_scope (dip, thisdie, enddie, objfile) | |
762 | struct dieinfo *dip; | |
763 | char *thisdie; | |
764 | char *enddie; | |
765 | struct objfile *objfile; | |
766 | { | |
767 | register struct context_stack *new; | |
768 | ||
c5aa993b JM |
769 | push_context (0, dip->at_low_pc); |
770 | process_dies (thisdie + dip->die_length, enddie, objfile); | |
c906108c SS |
771 | new = pop_context (); |
772 | if (local_symbols != NULL) | |
773 | { | |
c5aa993b JM |
774 | finish_block (0, &local_symbols, new->old_blocks, new->start_addr, |
775 | dip->at_high_pc, objfile); | |
c906108c | 776 | } |
c5aa993b | 777 | local_symbols = new->locals; |
c906108c SS |
778 | } |
779 | ||
780 | /* | |
781 | ||
c5aa993b | 782 | LOCAL FUNCTION |
c906108c | 783 | |
c5aa993b | 784 | lookup_utype -- look up a user defined type from die reference |
c906108c | 785 | |
c5aa993b | 786 | SYNOPSIS |
c906108c | 787 | |
c5aa993b | 788 | static type *lookup_utype (DIE_REF die_ref) |
c906108c | 789 | |
c5aa993b | 790 | DESCRIPTION |
c906108c | 791 | |
c5aa993b JM |
792 | Given a DIE reference, lookup the user defined type associated with |
793 | that DIE, if it has been registered already. If not registered, then | |
794 | return NULL. Alloc_utype() can be called to register an empty | |
795 | type for this reference, which will be filled in later when the | |
796 | actual referenced DIE is processed. | |
c906108c SS |
797 | */ |
798 | ||
799 | static struct type * | |
800 | lookup_utype (die_ref) | |
801 | DIE_REF die_ref; | |
802 | { | |
803 | struct type *type = NULL; | |
804 | int utypeidx; | |
c5aa993b | 805 | |
c906108c SS |
806 | utypeidx = (die_ref - dbroff) / 4; |
807 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
808 | { | |
809 | complain (&bad_die_ref, DIE_ID, DIE_NAME); | |
810 | } | |
811 | else | |
812 | { | |
813 | type = *(utypes + utypeidx); | |
814 | } | |
815 | return (type); | |
816 | } | |
817 | ||
818 | ||
819 | /* | |
820 | ||
c5aa993b | 821 | LOCAL FUNCTION |
c906108c | 822 | |
c5aa993b | 823 | alloc_utype -- add a user defined type for die reference |
c906108c | 824 | |
c5aa993b | 825 | SYNOPSIS |
c906108c | 826 | |
c5aa993b | 827 | static type *alloc_utype (DIE_REF die_ref, struct type *utypep) |
c906108c | 828 | |
c5aa993b | 829 | DESCRIPTION |
c906108c | 830 | |
c5aa993b JM |
831 | Given a die reference DIE_REF, and a possible pointer to a user |
832 | defined type UTYPEP, register that this reference has a user | |
833 | defined type and either use the specified type in UTYPEP or | |
834 | make a new empty type that will be filled in later. | |
c906108c | 835 | |
c5aa993b JM |
836 | We should only be called after calling lookup_utype() to verify that |
837 | there is not currently a type registered for DIE_REF. | |
c906108c SS |
838 | */ |
839 | ||
840 | static struct type * | |
841 | alloc_utype (die_ref, utypep) | |
842 | DIE_REF die_ref; | |
843 | struct type *utypep; | |
844 | { | |
845 | struct type **typep; | |
846 | int utypeidx; | |
c5aa993b | 847 | |
c906108c SS |
848 | utypeidx = (die_ref - dbroff) / 4; |
849 | typep = utypes + utypeidx; | |
850 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
851 | { | |
852 | utypep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
853 | complain (&bad_die_ref, DIE_ID, DIE_NAME); | |
854 | } | |
855 | else if (*typep != NULL) | |
856 | { | |
857 | utypep = *typep; | |
858 | complain (&dup_user_type_allocation, DIE_ID, DIE_NAME); | |
859 | } | |
860 | else | |
861 | { | |
862 | if (utypep == NULL) | |
863 | { | |
864 | utypep = alloc_type (current_objfile); | |
865 | } | |
866 | *typep = utypep; | |
867 | } | |
868 | return (utypep); | |
869 | } | |
870 | ||
871 | /* | |
872 | ||
c5aa993b | 873 | LOCAL FUNCTION |
c906108c | 874 | |
c5aa993b | 875 | free_utypes -- free the utypes array and reset pointer & count |
c906108c | 876 | |
c5aa993b | 877 | SYNOPSIS |
c906108c | 878 | |
c5aa993b | 879 | static void free_utypes (PTR dummy) |
c906108c | 880 | |
c5aa993b | 881 | DESCRIPTION |
c906108c | 882 | |
c5aa993b JM |
883 | Called via do_cleanups to free the utypes array, reset the pointer to NULL, |
884 | and set numutypes back to zero. This ensures that the utypes does not get | |
885 | referenced after being freed. | |
c906108c SS |
886 | */ |
887 | ||
888 | static void | |
889 | free_utypes (dummy) | |
890 | PTR dummy; | |
891 | { | |
892 | free (utypes); | |
893 | utypes = NULL; | |
894 | numutypes = 0; | |
895 | } | |
896 | ||
897 | ||
898 | /* | |
899 | ||
c5aa993b | 900 | LOCAL FUNCTION |
c906108c | 901 | |
c5aa993b | 902 | decode_die_type -- return a type for a specified die |
c906108c | 903 | |
c5aa993b | 904 | SYNOPSIS |
c906108c | 905 | |
c5aa993b | 906 | static struct type *decode_die_type (struct dieinfo *dip) |
c906108c | 907 | |
c5aa993b | 908 | DESCRIPTION |
c906108c | 909 | |
c5aa993b JM |
910 | Given a pointer to a die information structure DIP, decode the |
911 | type of the die and return a pointer to the decoded type. All | |
912 | dies without specific types default to type int. | |
c906108c SS |
913 | */ |
914 | ||
915 | static struct type * | |
916 | decode_die_type (dip) | |
917 | struct dieinfo *dip; | |
918 | { | |
919 | struct type *type = NULL; | |
c5aa993b JM |
920 | |
921 | if (dip->at_fund_type != 0) | |
c906108c | 922 | { |
c5aa993b | 923 | type = decode_fund_type (dip->at_fund_type); |
c906108c | 924 | } |
c5aa993b | 925 | else if (dip->at_mod_fund_type != NULL) |
c906108c | 926 | { |
c5aa993b | 927 | type = decode_mod_fund_type (dip->at_mod_fund_type); |
c906108c | 928 | } |
c5aa993b | 929 | else if (dip->at_user_def_type) |
c906108c | 930 | { |
c5aa993b | 931 | if ((type = lookup_utype (dip->at_user_def_type)) == NULL) |
c906108c | 932 | { |
c5aa993b | 933 | type = alloc_utype (dip->at_user_def_type, NULL); |
c906108c SS |
934 | } |
935 | } | |
c5aa993b | 936 | else if (dip->at_mod_u_d_type) |
c906108c | 937 | { |
c5aa993b | 938 | type = decode_mod_u_d_type (dip->at_mod_u_d_type); |
c906108c SS |
939 | } |
940 | else | |
941 | { | |
942 | type = dwarf_fundamental_type (current_objfile, FT_VOID); | |
943 | } | |
944 | return (type); | |
945 | } | |
946 | ||
947 | /* | |
948 | ||
c5aa993b | 949 | LOCAL FUNCTION |
c906108c | 950 | |
c5aa993b | 951 | struct_type -- compute and return the type for a struct or union |
c906108c | 952 | |
c5aa993b | 953 | SYNOPSIS |
c906108c | 954 | |
c5aa993b JM |
955 | static struct type *struct_type (struct dieinfo *dip, char *thisdie, |
956 | char *enddie, struct objfile *objfile) | |
c906108c | 957 | |
c5aa993b | 958 | DESCRIPTION |
c906108c | 959 | |
c5aa993b JM |
960 | Given pointer to a die information structure for a die which |
961 | defines a union or structure (and MUST define one or the other), | |
962 | and pointers to the raw die data that define the range of dies which | |
963 | define the members, compute and return the user defined type for the | |
964 | structure or union. | |
c906108c SS |
965 | */ |
966 | ||
967 | static struct type * | |
968 | struct_type (dip, thisdie, enddie, objfile) | |
969 | struct dieinfo *dip; | |
970 | char *thisdie; | |
971 | char *enddie; | |
972 | struct objfile *objfile; | |
973 | { | |
974 | struct type *type; | |
c5aa993b JM |
975 | struct nextfield |
976 | { | |
977 | struct nextfield *next; | |
978 | struct field field; | |
979 | }; | |
c906108c SS |
980 | struct nextfield *list = NULL; |
981 | struct nextfield *new; | |
982 | int nfields = 0; | |
983 | int n; | |
984 | struct dieinfo mbr; | |
985 | char *nextdie; | |
986 | int anonymous_size; | |
c5aa993b JM |
987 | |
988 | if ((type = lookup_utype (dip->die_ref)) == NULL) | |
c906108c SS |
989 | { |
990 | /* No forward references created an empty type, so install one now */ | |
c5aa993b | 991 | type = alloc_utype (dip->die_ref, NULL); |
c906108c | 992 | } |
c5aa993b JM |
993 | INIT_CPLUS_SPECIFIC (type); |
994 | switch (dip->die_tag) | |
c906108c | 995 | { |
c5aa993b JM |
996 | case TAG_class_type: |
997 | TYPE_CODE (type) = TYPE_CODE_CLASS; | |
998 | break; | |
999 | case TAG_structure_type: | |
1000 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
1001 | break; | |
1002 | case TAG_union_type: | |
1003 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
1004 | break; | |
1005 | default: | |
1006 | /* Should never happen */ | |
1007 | TYPE_CODE (type) = TYPE_CODE_UNDEF; | |
1008 | complain (&missing_tag, DIE_ID, DIE_NAME); | |
1009 | break; | |
c906108c SS |
1010 | } |
1011 | /* Some compilers try to be helpful by inventing "fake" names for | |
1012 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1013 | Thanks, but no thanks... */ | |
c5aa993b JM |
1014 | if (dip->at_name != NULL |
1015 | && *dip->at_name != '~' | |
1016 | && *dip->at_name != '.') | |
c906108c | 1017 | { |
c5aa993b JM |
1018 | TYPE_TAG_NAME (type) = obconcat (&objfile->type_obstack, |
1019 | "", "", dip->at_name); | |
c906108c SS |
1020 | } |
1021 | /* Use whatever size is known. Zero is a valid size. We might however | |
1022 | wish to check has_at_byte_size to make sure that some byte size was | |
1023 | given explicitly, but DWARF doesn't specify that explicit sizes of | |
1024 | zero have to present, so complaining about missing sizes should | |
1025 | probably not be the default. */ | |
c5aa993b JM |
1026 | TYPE_LENGTH (type) = dip->at_byte_size; |
1027 | thisdie += dip->die_length; | |
c906108c SS |
1028 | while (thisdie < enddie) |
1029 | { | |
1030 | basicdieinfo (&mbr, thisdie, objfile); | |
1031 | completedieinfo (&mbr, objfile); | |
1032 | if (mbr.die_length <= SIZEOF_DIE_LENGTH) | |
1033 | { | |
1034 | break; | |
1035 | } | |
1036 | else if (mbr.at_sibling != 0) | |
1037 | { | |
1038 | nextdie = dbbase + mbr.at_sibling - dbroff; | |
1039 | } | |
1040 | else | |
1041 | { | |
1042 | nextdie = thisdie + mbr.die_length; | |
1043 | } | |
1044 | switch (mbr.die_tag) | |
1045 | { | |
1046 | case TAG_member: | |
1047 | /* Get space to record the next field's data. */ | |
1048 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
c5aa993b | 1049 | new->next = list; |
c906108c SS |
1050 | list = new; |
1051 | /* Save the data. */ | |
c5aa993b JM |
1052 | list->field.name = |
1053 | obsavestring (mbr.at_name, strlen (mbr.at_name), | |
1054 | &objfile->type_obstack); | |
c906108c SS |
1055 | FIELD_TYPE (list->field) = decode_die_type (&mbr); |
1056 | FIELD_BITPOS (list->field) = 8 * locval (&mbr); | |
1057 | /* Handle bit fields. */ | |
1058 | FIELD_BITSIZE (list->field) = mbr.at_bit_size; | |
1059 | if (BITS_BIG_ENDIAN) | |
1060 | { | |
1061 | /* For big endian bits, the at_bit_offset gives the | |
c5aa993b JM |
1062 | additional bit offset from the MSB of the containing |
1063 | anonymous object to the MSB of the field. We don't | |
1064 | have to do anything special since we don't need to | |
1065 | know the size of the anonymous object. */ | |
c906108c SS |
1066 | FIELD_BITPOS (list->field) += mbr.at_bit_offset; |
1067 | } | |
1068 | else | |
1069 | { | |
1070 | /* For little endian bits, we need to have a non-zero | |
c5aa993b JM |
1071 | at_bit_size, so that we know we are in fact dealing |
1072 | with a bitfield. Compute the bit offset to the MSB | |
1073 | of the anonymous object, subtract off the number of | |
1074 | bits from the MSB of the field to the MSB of the | |
1075 | object, and then subtract off the number of bits of | |
1076 | the field itself. The result is the bit offset of | |
1077 | the LSB of the field. */ | |
c906108c SS |
1078 | if (mbr.at_bit_size > 0) |
1079 | { | |
1080 | if (mbr.has_at_byte_size) | |
1081 | { | |
1082 | /* The size of the anonymous object containing | |
c5aa993b JM |
1083 | the bit field is explicit, so use the |
1084 | indicated size (in bytes). */ | |
c906108c SS |
1085 | anonymous_size = mbr.at_byte_size; |
1086 | } | |
1087 | else | |
1088 | { | |
1089 | /* The size of the anonymous object containing | |
c5aa993b JM |
1090 | the bit field matches the size of an object |
1091 | of the bit field's type. DWARF allows | |
1092 | at_byte_size to be left out in such cases, as | |
1093 | a debug information size optimization. */ | |
1094 | anonymous_size = TYPE_LENGTH (list->field.type); | |
c906108c SS |
1095 | } |
1096 | FIELD_BITPOS (list->field) += | |
1097 | anonymous_size * 8 - mbr.at_bit_offset - mbr.at_bit_size; | |
1098 | } | |
1099 | } | |
1100 | nfields++; | |
1101 | break; | |
1102 | default: | |
1103 | process_dies (thisdie, nextdie, objfile); | |
1104 | break; | |
1105 | } | |
1106 | thisdie = nextdie; | |
1107 | } | |
1108 | /* Now create the vector of fields, and record how big it is. We may | |
1109 | not even have any fields, if this DIE was generated due to a reference | |
1110 | to an anonymous structure or union. In this case, TYPE_FLAG_STUB is | |
1111 | set, which clues gdb in to the fact that it needs to search elsewhere | |
1112 | for the full structure definition. */ | |
1113 | if (nfields == 0) | |
1114 | { | |
1115 | TYPE_FLAGS (type) |= TYPE_FLAG_STUB; | |
1116 | } | |
1117 | else | |
1118 | { | |
1119 | TYPE_NFIELDS (type) = nfields; | |
1120 | TYPE_FIELDS (type) = (struct field *) | |
1121 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
1122 | /* Copy the saved-up fields into the field vector. */ | |
c5aa993b | 1123 | for (n = nfields; list; list = list->next) |
c906108c | 1124 | { |
c5aa993b JM |
1125 | TYPE_FIELD (type, --n) = list->field; |
1126 | } | |
c906108c SS |
1127 | } |
1128 | return (type); | |
1129 | } | |
1130 | ||
1131 | /* | |
1132 | ||
c5aa993b | 1133 | LOCAL FUNCTION |
c906108c | 1134 | |
c5aa993b | 1135 | read_structure_scope -- process all dies within struct or union |
c906108c | 1136 | |
c5aa993b | 1137 | SYNOPSIS |
c906108c | 1138 | |
c5aa993b JM |
1139 | static void read_structure_scope (struct dieinfo *dip, |
1140 | char *thisdie, char *enddie, struct objfile *objfile) | |
c906108c | 1141 | |
c5aa993b | 1142 | DESCRIPTION |
c906108c | 1143 | |
c5aa993b JM |
1144 | Called when we find the DIE that starts a structure or union |
1145 | scope (definition) to process all dies that define the members | |
1146 | of the structure or union. DIP is a pointer to the die info | |
1147 | struct for the DIE that names the structure or union. | |
c906108c | 1148 | |
c5aa993b JM |
1149 | NOTES |
1150 | ||
1151 | Note that we need to call struct_type regardless of whether or not | |
1152 | the DIE has an at_name attribute, since it might be an anonymous | |
1153 | structure or union. This gets the type entered into our set of | |
1154 | user defined types. | |
1155 | ||
1156 | However, if the structure is incomplete (an opaque struct/union) | |
1157 | then suppress creating a symbol table entry for it since gdb only | |
1158 | wants to find the one with the complete definition. Note that if | |
1159 | it is complete, we just call new_symbol, which does it's own | |
1160 | checking about whether the struct/union is anonymous or not (and | |
1161 | suppresses creating a symbol table entry itself). | |
c906108c | 1162 | |
c906108c SS |
1163 | */ |
1164 | ||
1165 | static void | |
1166 | read_structure_scope (dip, thisdie, enddie, objfile) | |
1167 | struct dieinfo *dip; | |
1168 | char *thisdie; | |
1169 | char *enddie; | |
1170 | struct objfile *objfile; | |
1171 | { | |
1172 | struct type *type; | |
1173 | struct symbol *sym; | |
c5aa993b | 1174 | |
c906108c SS |
1175 | type = struct_type (dip, thisdie, enddie, objfile); |
1176 | if (!(TYPE_FLAGS (type) & TYPE_FLAG_STUB)) | |
1177 | { | |
1178 | sym = new_symbol (dip, objfile); | |
1179 | if (sym != NULL) | |
1180 | { | |
1181 | SYMBOL_TYPE (sym) = type; | |
1182 | if (cu_language == language_cplus) | |
1183 | { | |
1184 | synthesize_typedef (dip, objfile, type); | |
1185 | } | |
1186 | } | |
1187 | } | |
1188 | } | |
1189 | ||
1190 | /* | |
1191 | ||
c5aa993b | 1192 | LOCAL FUNCTION |
c906108c | 1193 | |
c5aa993b | 1194 | decode_array_element_type -- decode type of the array elements |
c906108c | 1195 | |
c5aa993b | 1196 | SYNOPSIS |
c906108c | 1197 | |
c5aa993b | 1198 | static struct type *decode_array_element_type (char *scan, char *end) |
c906108c | 1199 | |
c5aa993b | 1200 | DESCRIPTION |
c906108c | 1201 | |
c5aa993b JM |
1202 | As the last step in decoding the array subscript information for an |
1203 | array DIE, we need to decode the type of the array elements. We are | |
1204 | passed a pointer to this last part of the subscript information and | |
1205 | must return the appropriate type. If the type attribute is not | |
1206 | recognized, just warn about the problem and return type int. | |
c906108c SS |
1207 | */ |
1208 | ||
1209 | static struct type * | |
1210 | decode_array_element_type (scan) | |
1211 | char *scan; | |
1212 | { | |
1213 | struct type *typep; | |
1214 | DIE_REF die_ref; | |
1215 | unsigned short attribute; | |
1216 | unsigned short fundtype; | |
1217 | int nbytes; | |
c5aa993b | 1218 | |
c906108c SS |
1219 | attribute = target_to_host (scan, SIZEOF_ATTRIBUTE, GET_UNSIGNED, |
1220 | current_objfile); | |
1221 | scan += SIZEOF_ATTRIBUTE; | |
1222 | if ((nbytes = attribute_size (attribute)) == -1) | |
1223 | { | |
1224 | complain (&bad_array_element_type, DIE_ID, DIE_NAME, attribute); | |
1225 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1226 | } | |
1227 | else | |
1228 | { | |
1229 | switch (attribute) | |
1230 | { | |
c5aa993b JM |
1231 | case AT_fund_type: |
1232 | fundtype = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1233 | current_objfile); | |
1234 | typep = decode_fund_type (fundtype); | |
1235 | break; | |
1236 | case AT_mod_fund_type: | |
1237 | typep = decode_mod_fund_type (scan); | |
1238 | break; | |
1239 | case AT_user_def_type: | |
1240 | die_ref = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1241 | current_objfile); | |
1242 | if ((typep = lookup_utype (die_ref)) == NULL) | |
1243 | { | |
1244 | typep = alloc_utype (die_ref, NULL); | |
1245 | } | |
1246 | break; | |
1247 | case AT_mod_u_d_type: | |
1248 | typep = decode_mod_u_d_type (scan); | |
1249 | break; | |
1250 | default: | |
1251 | complain (&bad_array_element_type, DIE_ID, DIE_NAME, attribute); | |
1252 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1253 | break; | |
1254 | } | |
c906108c SS |
1255 | } |
1256 | return (typep); | |
1257 | } | |
1258 | ||
1259 | /* | |
1260 | ||
c5aa993b | 1261 | LOCAL FUNCTION |
c906108c | 1262 | |
c5aa993b | 1263 | decode_subscript_data_item -- decode array subscript item |
c906108c | 1264 | |
c5aa993b | 1265 | SYNOPSIS |
c906108c | 1266 | |
c5aa993b JM |
1267 | static struct type * |
1268 | decode_subscript_data_item (char *scan, char *end) | |
c906108c | 1269 | |
c5aa993b | 1270 | DESCRIPTION |
c906108c | 1271 | |
c5aa993b JM |
1272 | The array subscripts and the data type of the elements of an |
1273 | array are described by a list of data items, stored as a block | |
1274 | of contiguous bytes. There is a data item describing each array | |
1275 | dimension, and a final data item describing the element type. | |
1276 | The data items are ordered the same as their appearance in the | |
1277 | source (I.E. leftmost dimension first, next to leftmost second, | |
1278 | etc). | |
c906108c | 1279 | |
c5aa993b JM |
1280 | The data items describing each array dimension consist of four |
1281 | parts: (1) a format specifier, (2) type type of the subscript | |
1282 | index, (3) a description of the low bound of the array dimension, | |
1283 | and (4) a description of the high bound of the array dimension. | |
c906108c | 1284 | |
c5aa993b JM |
1285 | The last data item is the description of the type of each of |
1286 | the array elements. | |
c906108c | 1287 | |
c5aa993b JM |
1288 | We are passed a pointer to the start of the block of bytes |
1289 | containing the remaining data items, and a pointer to the first | |
1290 | byte past the data. This function recursively decodes the | |
1291 | remaining data items and returns a type. | |
c906108c | 1292 | |
c5aa993b JM |
1293 | If we somehow fail to decode some data, we complain about it |
1294 | and return a type "array of int". | |
c906108c | 1295 | |
c5aa993b JM |
1296 | BUGS |
1297 | FIXME: This code only implements the forms currently used | |
1298 | by the AT&T and GNU C compilers. | |
c906108c | 1299 | |
c5aa993b JM |
1300 | The end pointer is supplied for error checking, maybe we should |
1301 | use it for that... | |
c906108c SS |
1302 | */ |
1303 | ||
1304 | static struct type * | |
1305 | decode_subscript_data_item (scan, end) | |
1306 | char *scan; | |
1307 | char *end; | |
1308 | { | |
1309 | struct type *typep = NULL; /* Array type we are building */ | |
1310 | struct type *nexttype; /* Type of each element (may be array) */ | |
1311 | struct type *indextype; /* Type of this index */ | |
1312 | struct type *rangetype; | |
1313 | unsigned int format; | |
1314 | unsigned short fundtype; | |
1315 | unsigned long lowbound; | |
1316 | unsigned long highbound; | |
1317 | int nbytes; | |
c5aa993b | 1318 | |
c906108c SS |
1319 | format = target_to_host (scan, SIZEOF_FORMAT_SPECIFIER, GET_UNSIGNED, |
1320 | current_objfile); | |
1321 | scan += SIZEOF_FORMAT_SPECIFIER; | |
1322 | switch (format) | |
1323 | { | |
1324 | case FMT_ET: | |
1325 | typep = decode_array_element_type (scan); | |
1326 | break; | |
1327 | case FMT_FT_C_C: | |
1328 | fundtype = target_to_host (scan, SIZEOF_FMT_FT, GET_UNSIGNED, | |
1329 | current_objfile); | |
1330 | indextype = decode_fund_type (fundtype); | |
1331 | scan += SIZEOF_FMT_FT; | |
1332 | nbytes = TARGET_FT_LONG_SIZE (current_objfile); | |
1333 | lowbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1334 | scan += nbytes; | |
1335 | highbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1336 | scan += nbytes; | |
1337 | nexttype = decode_subscript_data_item (scan, end); | |
1338 | if (nexttype == NULL) | |
1339 | { | |
1340 | /* Munged subscript data or other problem, fake it. */ | |
1341 | complain (&subscript_data_items, DIE_ID, DIE_NAME); | |
1342 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1343 | } | |
1344 | rangetype = create_range_type ((struct type *) NULL, indextype, | |
c5aa993b | 1345 | lowbound, highbound); |
c906108c SS |
1346 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); |
1347 | break; | |
1348 | case FMT_FT_C_X: | |
1349 | case FMT_FT_X_C: | |
1350 | case FMT_FT_X_X: | |
1351 | case FMT_UT_C_C: | |
1352 | case FMT_UT_C_X: | |
1353 | case FMT_UT_X_C: | |
1354 | case FMT_UT_X_X: | |
1355 | complain (&unhandled_array_subscript_format, DIE_ID, DIE_NAME, format); | |
1356 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1357 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1358 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
1359 | break; | |
1360 | default: | |
1361 | complain (&unknown_array_subscript_format, DIE_ID, DIE_NAME, format); | |
1362 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1363 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1364 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
1365 | break; | |
1366 | } | |
1367 | return (typep); | |
1368 | } | |
1369 | ||
1370 | /* | |
1371 | ||
c5aa993b | 1372 | LOCAL FUNCTION |
c906108c | 1373 | |
c5aa993b | 1374 | dwarf_read_array_type -- read TAG_array_type DIE |
c906108c | 1375 | |
c5aa993b | 1376 | SYNOPSIS |
c906108c | 1377 | |
c5aa993b | 1378 | static void dwarf_read_array_type (struct dieinfo *dip) |
c906108c | 1379 | |
c5aa993b | 1380 | DESCRIPTION |
c906108c | 1381 | |
c5aa993b JM |
1382 | Extract all information from a TAG_array_type DIE and add to |
1383 | the user defined type vector. | |
c906108c SS |
1384 | */ |
1385 | ||
1386 | static void | |
1387 | dwarf_read_array_type (dip) | |
1388 | struct dieinfo *dip; | |
1389 | { | |
1390 | struct type *type; | |
1391 | struct type *utype; | |
1392 | char *sub; | |
1393 | char *subend; | |
1394 | unsigned short blocksz; | |
1395 | int nbytes; | |
c5aa993b JM |
1396 | |
1397 | if (dip->at_ordering != ORD_row_major) | |
c906108c SS |
1398 | { |
1399 | /* FIXME: Can gdb even handle column major arrays? */ | |
1400 | complain (¬_row_major, DIE_ID, DIE_NAME); | |
1401 | } | |
c5aa993b | 1402 | if ((sub = dip->at_subscr_data) != NULL) |
c906108c SS |
1403 | { |
1404 | nbytes = attribute_size (AT_subscr_data); | |
1405 | blocksz = target_to_host (sub, nbytes, GET_UNSIGNED, current_objfile); | |
1406 | subend = sub + nbytes + blocksz; | |
1407 | sub += nbytes; | |
1408 | type = decode_subscript_data_item (sub, subend); | |
c5aa993b | 1409 | if ((utype = lookup_utype (dip->die_ref)) == NULL) |
c906108c SS |
1410 | { |
1411 | /* Install user defined type that has not been referenced yet. */ | |
c5aa993b | 1412 | alloc_utype (dip->die_ref, type); |
c906108c SS |
1413 | } |
1414 | else if (TYPE_CODE (utype) == TYPE_CODE_UNDEF) | |
1415 | { | |
1416 | /* Ick! A forward ref has already generated a blank type in our | |
1417 | slot, and this type probably already has things pointing to it | |
1418 | (which is what caused it to be created in the first place). | |
1419 | If it's just a place holder we can plop our fully defined type | |
1420 | on top of it. We can't recover the space allocated for our | |
1421 | new type since it might be on an obstack, but we could reuse | |
1422 | it if we kept a list of them, but it might not be worth it | |
1423 | (FIXME). */ | |
1424 | *utype = *type; | |
1425 | } | |
1426 | else | |
1427 | { | |
1428 | /* Double ick! Not only is a type already in our slot, but | |
1429 | someone has decorated it. Complain and leave it alone. */ | |
1430 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); | |
1431 | } | |
1432 | } | |
1433 | } | |
1434 | ||
1435 | /* | |
1436 | ||
c5aa993b | 1437 | LOCAL FUNCTION |
c906108c | 1438 | |
c5aa993b | 1439 | read_tag_pointer_type -- read TAG_pointer_type DIE |
c906108c | 1440 | |
c5aa993b | 1441 | SYNOPSIS |
c906108c | 1442 | |
c5aa993b | 1443 | static void read_tag_pointer_type (struct dieinfo *dip) |
c906108c | 1444 | |
c5aa993b | 1445 | DESCRIPTION |
c906108c | 1446 | |
c5aa993b JM |
1447 | Extract all information from a TAG_pointer_type DIE and add to |
1448 | the user defined type vector. | |
c906108c SS |
1449 | */ |
1450 | ||
1451 | static void | |
1452 | read_tag_pointer_type (dip) | |
1453 | struct dieinfo *dip; | |
1454 | { | |
1455 | struct type *type; | |
1456 | struct type *utype; | |
c5aa993b | 1457 | |
c906108c | 1458 | type = decode_die_type (dip); |
c5aa993b | 1459 | if ((utype = lookup_utype (dip->die_ref)) == NULL) |
c906108c SS |
1460 | { |
1461 | utype = lookup_pointer_type (type); | |
c5aa993b | 1462 | alloc_utype (dip->die_ref, utype); |
c906108c SS |
1463 | } |
1464 | else | |
1465 | { | |
1466 | TYPE_TARGET_TYPE (utype) = type; | |
1467 | TYPE_POINTER_TYPE (type) = utype; | |
1468 | ||
1469 | /* We assume the machine has only one representation for pointers! */ | |
1470 | /* FIXME: Possably a poor assumption */ | |
c5aa993b | 1471 | TYPE_LENGTH (utype) = TARGET_PTR_BIT / TARGET_CHAR_BIT; |
c906108c SS |
1472 | TYPE_CODE (utype) = TYPE_CODE_PTR; |
1473 | } | |
1474 | } | |
1475 | ||
1476 | /* | |
1477 | ||
c5aa993b | 1478 | LOCAL FUNCTION |
c906108c | 1479 | |
c5aa993b | 1480 | read_tag_string_type -- read TAG_string_type DIE |
c906108c | 1481 | |
c5aa993b | 1482 | SYNOPSIS |
c906108c | 1483 | |
c5aa993b | 1484 | static void read_tag_string_type (struct dieinfo *dip) |
c906108c | 1485 | |
c5aa993b | 1486 | DESCRIPTION |
c906108c | 1487 | |
c5aa993b JM |
1488 | Extract all information from a TAG_string_type DIE and add to |
1489 | the user defined type vector. It isn't really a user defined | |
1490 | type, but it behaves like one, with other DIE's using an | |
1491 | AT_user_def_type attribute to reference it. | |
c906108c SS |
1492 | */ |
1493 | ||
1494 | static void | |
1495 | read_tag_string_type (dip) | |
1496 | struct dieinfo *dip; | |
1497 | { | |
1498 | struct type *utype; | |
1499 | struct type *indextype; | |
1500 | struct type *rangetype; | |
1501 | unsigned long lowbound = 0; | |
1502 | unsigned long highbound; | |
1503 | ||
c5aa993b | 1504 | if (dip->has_at_byte_size) |
c906108c SS |
1505 | { |
1506 | /* A fixed bounds string */ | |
c5aa993b | 1507 | highbound = dip->at_byte_size - 1; |
c906108c SS |
1508 | } |
1509 | else | |
1510 | { | |
1511 | /* A varying length string. Stub for now. (FIXME) */ | |
1512 | highbound = 1; | |
1513 | } | |
1514 | indextype = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1515 | rangetype = create_range_type ((struct type *) NULL, indextype, lowbound, | |
1516 | highbound); | |
c5aa993b JM |
1517 | |
1518 | utype = lookup_utype (dip->die_ref); | |
c906108c SS |
1519 | if (utype == NULL) |
1520 | { | |
1521 | /* No type defined, go ahead and create a blank one to use. */ | |
c5aa993b | 1522 | utype = alloc_utype (dip->die_ref, (struct type *) NULL); |
c906108c SS |
1523 | } |
1524 | else | |
1525 | { | |
1526 | /* Already a type in our slot due to a forward reference. Make sure it | |
c5aa993b | 1527 | is a blank one. If not, complain and leave it alone. */ |
c906108c SS |
1528 | if (TYPE_CODE (utype) != TYPE_CODE_UNDEF) |
1529 | { | |
1530 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); | |
1531 | return; | |
1532 | } | |
1533 | } | |
1534 | ||
1535 | /* Create the string type using the blank type we either found or created. */ | |
1536 | utype = create_string_type (utype, rangetype); | |
1537 | } | |
1538 | ||
1539 | /* | |
1540 | ||
c5aa993b | 1541 | LOCAL FUNCTION |
c906108c | 1542 | |
c5aa993b | 1543 | read_subroutine_type -- process TAG_subroutine_type dies |
c906108c | 1544 | |
c5aa993b | 1545 | SYNOPSIS |
c906108c | 1546 | |
c5aa993b JM |
1547 | static void read_subroutine_type (struct dieinfo *dip, char thisdie, |
1548 | char *enddie) | |
c906108c | 1549 | |
c5aa993b | 1550 | DESCRIPTION |
c906108c | 1551 | |
c5aa993b | 1552 | Handle DIES due to C code like: |
c906108c | 1553 | |
c5aa993b JM |
1554 | struct foo { |
1555 | int (*funcp)(int a, long l); (Generates TAG_subroutine_type DIE) | |
1556 | int b; | |
1557 | }; | |
c906108c | 1558 | |
c5aa993b | 1559 | NOTES |
c906108c | 1560 | |
c5aa993b JM |
1561 | The parameter DIES are currently ignored. See if gdb has a way to |
1562 | include this info in it's type system, and decode them if so. Is | |
1563 | this what the type structure's "arg_types" field is for? (FIXME) | |
c906108c SS |
1564 | */ |
1565 | ||
1566 | static void | |
1567 | read_subroutine_type (dip, thisdie, enddie) | |
1568 | struct dieinfo *dip; | |
1569 | char *thisdie; | |
1570 | char *enddie; | |
1571 | { | |
1572 | struct type *type; /* Type that this function returns */ | |
1573 | struct type *ftype; /* Function that returns above type */ | |
c5aa993b | 1574 | |
c906108c SS |
1575 | /* Decode the type that this subroutine returns */ |
1576 | ||
1577 | type = decode_die_type (dip); | |
1578 | ||
1579 | /* Check to see if we already have a partially constructed user | |
1580 | defined type for this DIE, from a forward reference. */ | |
1581 | ||
c5aa993b | 1582 | if ((ftype = lookup_utype (dip->die_ref)) == NULL) |
c906108c SS |
1583 | { |
1584 | /* This is the first reference to one of these types. Make | |
c5aa993b | 1585 | a new one and place it in the user defined types. */ |
c906108c | 1586 | ftype = lookup_function_type (type); |
c5aa993b | 1587 | alloc_utype (dip->die_ref, ftype); |
c906108c SS |
1588 | } |
1589 | else if (TYPE_CODE (ftype) == TYPE_CODE_UNDEF) | |
1590 | { | |
1591 | /* We have an existing partially constructed type, so bash it | |
c5aa993b | 1592 | into the correct type. */ |
c906108c SS |
1593 | TYPE_TARGET_TYPE (ftype) = type; |
1594 | TYPE_LENGTH (ftype) = 1; | |
1595 | TYPE_CODE (ftype) = TYPE_CODE_FUNC; | |
1596 | } | |
1597 | else | |
1598 | { | |
1599 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); | |
1600 | } | |
1601 | } | |
1602 | ||
1603 | /* | |
1604 | ||
c5aa993b | 1605 | LOCAL FUNCTION |
c906108c | 1606 | |
c5aa993b | 1607 | read_enumeration -- process dies which define an enumeration |
c906108c | 1608 | |
c5aa993b | 1609 | SYNOPSIS |
c906108c | 1610 | |
c5aa993b JM |
1611 | static void read_enumeration (struct dieinfo *dip, char *thisdie, |
1612 | char *enddie, struct objfile *objfile) | |
c906108c | 1613 | |
c5aa993b | 1614 | DESCRIPTION |
c906108c | 1615 | |
c5aa993b JM |
1616 | Given a pointer to a die which begins an enumeration, process all |
1617 | the dies that define the members of the enumeration. | |
c906108c | 1618 | |
c5aa993b | 1619 | NOTES |
c906108c | 1620 | |
c5aa993b JM |
1621 | Note that we need to call enum_type regardless of whether or not we |
1622 | have a symbol, since we might have an enum without a tag name (thus | |
1623 | no symbol for the tagname). | |
c906108c SS |
1624 | */ |
1625 | ||
1626 | static void | |
1627 | read_enumeration (dip, thisdie, enddie, objfile) | |
1628 | struct dieinfo *dip; | |
1629 | char *thisdie; | |
1630 | char *enddie; | |
1631 | struct objfile *objfile; | |
1632 | { | |
1633 | struct type *type; | |
1634 | struct symbol *sym; | |
c5aa993b | 1635 | |
c906108c SS |
1636 | type = enum_type (dip, objfile); |
1637 | sym = new_symbol (dip, objfile); | |
1638 | if (sym != NULL) | |
1639 | { | |
1640 | SYMBOL_TYPE (sym) = type; | |
1641 | if (cu_language == language_cplus) | |
1642 | { | |
1643 | synthesize_typedef (dip, objfile, type); | |
1644 | } | |
1645 | } | |
1646 | } | |
1647 | ||
1648 | /* | |
1649 | ||
c5aa993b | 1650 | LOCAL FUNCTION |
c906108c | 1651 | |
c5aa993b | 1652 | enum_type -- decode and return a type for an enumeration |
c906108c | 1653 | |
c5aa993b | 1654 | SYNOPSIS |
c906108c | 1655 | |
c5aa993b | 1656 | static type *enum_type (struct dieinfo *dip, struct objfile *objfile) |
c906108c | 1657 | |
c5aa993b | 1658 | DESCRIPTION |
c906108c | 1659 | |
c5aa993b JM |
1660 | Given a pointer to a die information structure for the die which |
1661 | starts an enumeration, process all the dies that define the members | |
1662 | of the enumeration and return a type pointer for the enumeration. | |
c906108c | 1663 | |
c5aa993b JM |
1664 | At the same time, for each member of the enumeration, create a |
1665 | symbol for it with namespace VAR_NAMESPACE and class LOC_CONST, | |
1666 | and give it the type of the enumeration itself. | |
c906108c | 1667 | |
c5aa993b | 1668 | NOTES |
c906108c | 1669 | |
c5aa993b JM |
1670 | Note that the DWARF specification explicitly mandates that enum |
1671 | constants occur in reverse order from the source program order, | |
1672 | for "consistency" and because this ordering is easier for many | |
1673 | compilers to generate. (Draft 6, sec 3.8.5, Enumeration type | |
1674 | Entries). Because gdb wants to see the enum members in program | |
1675 | source order, we have to ensure that the order gets reversed while | |
1676 | we are processing them. | |
c906108c SS |
1677 | */ |
1678 | ||
1679 | static struct type * | |
1680 | enum_type (dip, objfile) | |
1681 | struct dieinfo *dip; | |
1682 | struct objfile *objfile; | |
1683 | { | |
1684 | struct type *type; | |
c5aa993b JM |
1685 | struct nextfield |
1686 | { | |
1687 | struct nextfield *next; | |
1688 | struct field field; | |
1689 | }; | |
c906108c SS |
1690 | struct nextfield *list = NULL; |
1691 | struct nextfield *new; | |
1692 | int nfields = 0; | |
1693 | int n; | |
1694 | char *scan; | |
1695 | char *listend; | |
1696 | unsigned short blocksz; | |
1697 | struct symbol *sym; | |
1698 | int nbytes; | |
1699 | int unsigned_enum = 1; | |
c5aa993b JM |
1700 | |
1701 | if ((type = lookup_utype (dip->die_ref)) == NULL) | |
c906108c SS |
1702 | { |
1703 | /* No forward references created an empty type, so install one now */ | |
c5aa993b | 1704 | type = alloc_utype (dip->die_ref, NULL); |
c906108c SS |
1705 | } |
1706 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
1707 | /* Some compilers try to be helpful by inventing "fake" names for | |
1708 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1709 | Thanks, but no thanks... */ | |
c5aa993b JM |
1710 | if (dip->at_name != NULL |
1711 | && *dip->at_name != '~' | |
1712 | && *dip->at_name != '.') | |
c906108c | 1713 | { |
c5aa993b JM |
1714 | TYPE_TAG_NAME (type) = obconcat (&objfile->type_obstack, |
1715 | "", "", dip->at_name); | |
c906108c | 1716 | } |
c5aa993b | 1717 | if (dip->at_byte_size != 0) |
c906108c | 1718 | { |
c5aa993b | 1719 | TYPE_LENGTH (type) = dip->at_byte_size; |
c906108c | 1720 | } |
c5aa993b | 1721 | if ((scan = dip->at_element_list) != NULL) |
c906108c | 1722 | { |
c5aa993b | 1723 | if (dip->short_element_list) |
c906108c SS |
1724 | { |
1725 | nbytes = attribute_size (AT_short_element_list); | |
1726 | } | |
1727 | else | |
1728 | { | |
1729 | nbytes = attribute_size (AT_element_list); | |
1730 | } | |
1731 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); | |
1732 | listend = scan + nbytes + blocksz; | |
1733 | scan += nbytes; | |
1734 | while (scan < listend) | |
1735 | { | |
1736 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
c5aa993b | 1737 | new->next = list; |
c906108c SS |
1738 | list = new; |
1739 | FIELD_TYPE (list->field) = NULL; | |
1740 | FIELD_BITSIZE (list->field) = 0; | |
1741 | FIELD_BITPOS (list->field) = | |
1742 | target_to_host (scan, TARGET_FT_LONG_SIZE (objfile), GET_SIGNED, | |
1743 | objfile); | |
1744 | scan += TARGET_FT_LONG_SIZE (objfile); | |
c5aa993b JM |
1745 | list->field.name = obsavestring (scan, strlen (scan), |
1746 | &objfile->type_obstack); | |
c906108c SS |
1747 | scan += strlen (scan) + 1; |
1748 | nfields++; | |
1749 | /* Handcraft a new symbol for this enum member. */ | |
1750 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, | |
1751 | sizeof (struct symbol)); | |
1752 | memset (sym, 0, sizeof (struct symbol)); | |
c5aa993b | 1753 | SYMBOL_NAME (sym) = create_name (list->field.name, |
c906108c SS |
1754 | &objfile->symbol_obstack); |
1755 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); | |
1756 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1757 | SYMBOL_CLASS (sym) = LOC_CONST; | |
1758 | SYMBOL_TYPE (sym) = type; | |
1759 | SYMBOL_VALUE (sym) = FIELD_BITPOS (list->field); | |
1760 | if (SYMBOL_VALUE (sym) < 0) | |
1761 | unsigned_enum = 0; | |
1762 | add_symbol_to_list (sym, list_in_scope); | |
1763 | } | |
1764 | /* Now create the vector of fields, and record how big it is. This is | |
c5aa993b JM |
1765 | where we reverse the order, by pulling the members off the list in |
1766 | reverse order from how they were inserted. If we have no fields | |
1767 | (this is apparently possible in C++) then skip building a field | |
1768 | vector. */ | |
c906108c SS |
1769 | if (nfields > 0) |
1770 | { | |
1771 | if (unsigned_enum) | |
1772 | TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED; | |
1773 | TYPE_NFIELDS (type) = nfields; | |
1774 | TYPE_FIELDS (type) = (struct field *) | |
1775 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct field) * nfields); | |
1776 | /* Copy the saved-up fields into the field vector. */ | |
c5aa993b | 1777 | for (n = 0; (n < nfields) && (list != NULL); list = list->next) |
c906108c | 1778 | { |
c5aa993b JM |
1779 | TYPE_FIELD (type, n++) = list->field; |
1780 | } | |
c906108c SS |
1781 | } |
1782 | } | |
1783 | return (type); | |
1784 | } | |
1785 | ||
1786 | /* | |
1787 | ||
c5aa993b | 1788 | LOCAL FUNCTION |
c906108c | 1789 | |
c5aa993b | 1790 | read_func_scope -- process all dies within a function scope |
c906108c | 1791 | |
c5aa993b | 1792 | DESCRIPTION |
c906108c | 1793 | |
c5aa993b JM |
1794 | Process all dies within a given function scope. We are passed |
1795 | a die information structure pointer DIP for the die which | |
1796 | starts the function scope, and pointers into the raw die data | |
1797 | that define the dies within the function scope. | |
1798 | ||
1799 | For now, we ignore lexical block scopes within the function. | |
1800 | The problem is that AT&T cc does not define a DWARF lexical | |
1801 | block scope for the function itself, while gcc defines a | |
1802 | lexical block scope for the function. We need to think about | |
1803 | how to handle this difference, or if it is even a problem. | |
1804 | (FIXME) | |
c906108c SS |
1805 | */ |
1806 | ||
1807 | static void | |
1808 | read_func_scope (dip, thisdie, enddie, objfile) | |
1809 | struct dieinfo *dip; | |
1810 | char *thisdie; | |
1811 | char *enddie; | |
1812 | struct objfile *objfile; | |
1813 | { | |
1814 | register struct context_stack *new; | |
c5aa993b | 1815 | |
c906108c SS |
1816 | /* AT_name is absent if the function is described with an |
1817 | AT_abstract_origin tag. | |
1818 | Ignore the function description for now to avoid GDB core dumps. | |
1819 | FIXME: Add code to handle AT_abstract_origin tags properly. */ | |
c5aa993b | 1820 | if (dip->at_name == NULL) |
c906108c SS |
1821 | { |
1822 | complain (&missing_at_name, DIE_ID); | |
1823 | return; | |
1824 | } | |
1825 | ||
c5aa993b JM |
1826 | if (objfile->ei.entry_point >= dip->at_low_pc && |
1827 | objfile->ei.entry_point < dip->at_high_pc) | |
c906108c | 1828 | { |
c5aa993b JM |
1829 | objfile->ei.entry_func_lowpc = dip->at_low_pc; |
1830 | objfile->ei.entry_func_highpc = dip->at_high_pc; | |
c906108c | 1831 | } |
c5aa993b JM |
1832 | new = push_context (0, dip->at_low_pc); |
1833 | new->name = new_symbol (dip, objfile); | |
c906108c | 1834 | list_in_scope = &local_symbols; |
c5aa993b | 1835 | process_dies (thisdie + dip->die_length, enddie, objfile); |
c906108c SS |
1836 | new = pop_context (); |
1837 | /* Make a block for the local symbols within. */ | |
c5aa993b JM |
1838 | finish_block (new->name, &local_symbols, new->old_blocks, |
1839 | new->start_addr, dip->at_high_pc, objfile); | |
c906108c SS |
1840 | list_in_scope = &file_symbols; |
1841 | } | |
1842 | ||
1843 | ||
1844 | /* | |
1845 | ||
c5aa993b | 1846 | LOCAL FUNCTION |
c906108c | 1847 | |
c5aa993b | 1848 | handle_producer -- process the AT_producer attribute |
c906108c | 1849 | |
c5aa993b | 1850 | DESCRIPTION |
c906108c | 1851 | |
c5aa993b JM |
1852 | Perform any operations that depend on finding a particular |
1853 | AT_producer attribute. | |
c906108c SS |
1854 | |
1855 | */ | |
1856 | ||
1857 | static void | |
1858 | handle_producer (producer) | |
1859 | char *producer; | |
1860 | { | |
1861 | ||
1862 | /* If this compilation unit was compiled with g++ or gcc, then set the | |
1863 | processing_gcc_compilation flag. */ | |
1864 | ||
1865 | if (STREQN (producer, GCC_PRODUCER, strlen (GCC_PRODUCER))) | |
1866 | { | |
1867 | char version = producer[strlen (GCC_PRODUCER)]; | |
1868 | processing_gcc_compilation = (version == '2' ? 2 : 1); | |
1869 | } | |
1870 | else | |
1871 | { | |
1872 | processing_gcc_compilation = | |
1873 | STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER)) | |
1874 | || STREQN (producer, CHILL_PRODUCER, strlen (CHILL_PRODUCER)); | |
1875 | } | |
1876 | ||
1877 | /* Select a demangling style if we can identify the producer and if | |
1878 | the current style is auto. We leave the current style alone if it | |
1879 | is not auto. We also leave the demangling style alone if we find a | |
1880 | gcc (cc1) producer, as opposed to a g++ (cc1plus) producer. */ | |
1881 | ||
1882 | if (AUTO_DEMANGLING) | |
1883 | { | |
1884 | if (STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER))) | |
1885 | { | |
1886 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); | |
1887 | } | |
1888 | else if (STREQN (producer, LCC_PRODUCER, strlen (LCC_PRODUCER))) | |
1889 | { | |
1890 | set_demangling_style (LUCID_DEMANGLING_STYLE_STRING); | |
1891 | } | |
1892 | } | |
1893 | } | |
1894 | ||
1895 | ||
1896 | /* | |
1897 | ||
c5aa993b | 1898 | LOCAL FUNCTION |
c906108c | 1899 | |
c5aa993b | 1900 | read_file_scope -- process all dies within a file scope |
c906108c | 1901 | |
c5aa993b JM |
1902 | DESCRIPTION |
1903 | ||
1904 | Process all dies within a given file scope. We are passed a | |
1905 | pointer to the die information structure for the die which | |
1906 | starts the file scope, and pointers into the raw die data which | |
1907 | mark the range of dies within the file scope. | |
c906108c | 1908 | |
c5aa993b JM |
1909 | When the partial symbol table is built, the file offset for the line |
1910 | number table for each compilation unit is saved in the partial symbol | |
1911 | table entry for that compilation unit. As the symbols for each | |
1912 | compilation unit are read, the line number table is read into memory | |
1913 | and the variable lnbase is set to point to it. Thus all we have to | |
1914 | do is use lnbase to access the line number table for the current | |
1915 | compilation unit. | |
c906108c SS |
1916 | */ |
1917 | ||
1918 | static void | |
1919 | read_file_scope (dip, thisdie, enddie, objfile) | |
1920 | struct dieinfo *dip; | |
1921 | char *thisdie; | |
1922 | char *enddie; | |
1923 | struct objfile *objfile; | |
1924 | { | |
1925 | struct cleanup *back_to; | |
1926 | struct symtab *symtab; | |
c5aa993b JM |
1927 | |
1928 | if (objfile->ei.entry_point >= dip->at_low_pc && | |
1929 | objfile->ei.entry_point < dip->at_high_pc) | |
c906108c | 1930 | { |
c5aa993b JM |
1931 | objfile->ei.entry_file_lowpc = dip->at_low_pc; |
1932 | objfile->ei.entry_file_highpc = dip->at_high_pc; | |
c906108c SS |
1933 | } |
1934 | set_cu_language (dip); | |
c5aa993b | 1935 | if (dip->at_producer != NULL) |
c906108c | 1936 | { |
c5aa993b | 1937 | handle_producer (dip->at_producer); |
c906108c SS |
1938 | } |
1939 | numutypes = (enddie - thisdie) / 4; | |
1940 | utypes = (struct type **) xmalloc (numutypes * sizeof (struct type *)); | |
1941 | back_to = make_cleanup (free_utypes, NULL); | |
1942 | memset (utypes, 0, numutypes * sizeof (struct type *)); | |
1943 | memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *)); | |
c5aa993b | 1944 | start_symtab (dip->at_name, dip->at_comp_dir, dip->at_low_pc); |
c906108c SS |
1945 | record_debugformat ("DWARF 1"); |
1946 | decode_line_numbers (lnbase); | |
c5aa993b | 1947 | process_dies (thisdie + dip->die_length, enddie, objfile); |
c906108c | 1948 | |
c5aa993b | 1949 | symtab = end_symtab (dip->at_high_pc, objfile, 0); |
c906108c SS |
1950 | if (symtab != NULL) |
1951 | { | |
c5aa993b JM |
1952 | symtab->language = cu_language; |
1953 | } | |
c906108c SS |
1954 | do_cleanups (back_to); |
1955 | } | |
1956 | ||
1957 | /* | |
1958 | ||
c5aa993b | 1959 | LOCAL FUNCTION |
c906108c | 1960 | |
c5aa993b | 1961 | process_dies -- process a range of DWARF Information Entries |
c906108c | 1962 | |
c5aa993b | 1963 | SYNOPSIS |
c906108c | 1964 | |
c5aa993b JM |
1965 | static void process_dies (char *thisdie, char *enddie, |
1966 | struct objfile *objfile) | |
c906108c | 1967 | |
c5aa993b | 1968 | DESCRIPTION |
c906108c | 1969 | |
c5aa993b JM |
1970 | Process all DIE's in a specified range. May be (and almost |
1971 | certainly will be) called recursively. | |
c906108c SS |
1972 | */ |
1973 | ||
1974 | static void | |
1975 | process_dies (thisdie, enddie, objfile) | |
1976 | char *thisdie; | |
1977 | char *enddie; | |
1978 | struct objfile *objfile; | |
1979 | { | |
1980 | char *nextdie; | |
1981 | struct dieinfo di; | |
c5aa993b | 1982 | |
c906108c SS |
1983 | while (thisdie < enddie) |
1984 | { | |
1985 | basicdieinfo (&di, thisdie, objfile); | |
1986 | if (di.die_length < SIZEOF_DIE_LENGTH) | |
1987 | { | |
1988 | break; | |
1989 | } | |
1990 | else if (di.die_tag == TAG_padding) | |
1991 | { | |
1992 | nextdie = thisdie + di.die_length; | |
1993 | } | |
1994 | else | |
1995 | { | |
1996 | completedieinfo (&di, objfile); | |
1997 | if (di.at_sibling != 0) | |
1998 | { | |
1999 | nextdie = dbbase + di.at_sibling - dbroff; | |
2000 | } | |
2001 | else | |
2002 | { | |
2003 | nextdie = thisdie + di.die_length; | |
2004 | } | |
2005 | #ifdef SMASH_TEXT_ADDRESS | |
2006 | /* I think that these are always text, not data, addresses. */ | |
2007 | SMASH_TEXT_ADDRESS (di.at_low_pc); | |
2008 | SMASH_TEXT_ADDRESS (di.at_high_pc); | |
2009 | #endif | |
2010 | switch (di.die_tag) | |
2011 | { | |
2012 | case TAG_compile_unit: | |
2013 | /* Skip Tag_compile_unit if we are already inside a compilation | |
c5aa993b JM |
2014 | unit, we are unable to handle nested compilation units |
2015 | properly (FIXME). */ | |
c906108c SS |
2016 | if (current_subfile == NULL) |
2017 | read_file_scope (&di, thisdie, nextdie, objfile); | |
2018 | else | |
2019 | nextdie = thisdie + di.die_length; | |
2020 | break; | |
2021 | case TAG_global_subroutine: | |
2022 | case TAG_subroutine: | |
2023 | if (di.has_at_low_pc) | |
2024 | { | |
2025 | read_func_scope (&di, thisdie, nextdie, objfile); | |
2026 | } | |
2027 | break; | |
2028 | case TAG_lexical_block: | |
2029 | read_lexical_block_scope (&di, thisdie, nextdie, objfile); | |
2030 | break; | |
2031 | case TAG_class_type: | |
2032 | case TAG_structure_type: | |
2033 | case TAG_union_type: | |
2034 | read_structure_scope (&di, thisdie, nextdie, objfile); | |
2035 | break; | |
2036 | case TAG_enumeration_type: | |
2037 | read_enumeration (&di, thisdie, nextdie, objfile); | |
2038 | break; | |
2039 | case TAG_subroutine_type: | |
2040 | read_subroutine_type (&di, thisdie, nextdie); | |
2041 | break; | |
2042 | case TAG_array_type: | |
2043 | dwarf_read_array_type (&di); | |
2044 | break; | |
2045 | case TAG_pointer_type: | |
2046 | read_tag_pointer_type (&di); | |
2047 | break; | |
2048 | case TAG_string_type: | |
2049 | read_tag_string_type (&di); | |
2050 | break; | |
2051 | default: | |
2052 | new_symbol (&di, objfile); | |
2053 | break; | |
2054 | } | |
2055 | } | |
2056 | thisdie = nextdie; | |
2057 | } | |
2058 | } | |
2059 | ||
2060 | /* | |
2061 | ||
c5aa993b | 2062 | LOCAL FUNCTION |
c906108c | 2063 | |
c5aa993b | 2064 | decode_line_numbers -- decode a line number table fragment |
c906108c | 2065 | |
c5aa993b | 2066 | SYNOPSIS |
c906108c | 2067 | |
c5aa993b JM |
2068 | static void decode_line_numbers (char *tblscan, char *tblend, |
2069 | long length, long base, long line, long pc) | |
c906108c | 2070 | |
c5aa993b | 2071 | DESCRIPTION |
c906108c | 2072 | |
c5aa993b | 2073 | Translate the DWARF line number information to gdb form. |
c906108c | 2074 | |
c5aa993b JM |
2075 | The ".line" section contains one or more line number tables, one for |
2076 | each ".line" section from the objects that were linked. | |
c906108c | 2077 | |
c5aa993b JM |
2078 | The AT_stmt_list attribute for each TAG_source_file entry in the |
2079 | ".debug" section contains the offset into the ".line" section for the | |
2080 | start of the table for that file. | |
c906108c | 2081 | |
c5aa993b | 2082 | The table itself has the following structure: |
c906108c | 2083 | |
c5aa993b JM |
2084 | <table length><base address><source statement entry> |
2085 | 4 bytes 4 bytes 10 bytes | |
c906108c | 2086 | |
c5aa993b JM |
2087 | The table length is the total size of the table, including the 4 bytes |
2088 | for the length information. | |
c906108c | 2089 | |
c5aa993b JM |
2090 | The base address is the address of the first instruction generated |
2091 | for the source file. | |
c906108c | 2092 | |
c5aa993b | 2093 | Each source statement entry has the following structure: |
c906108c | 2094 | |
c5aa993b JM |
2095 | <line number><statement position><address delta> |
2096 | 4 bytes 2 bytes 4 bytes | |
c906108c | 2097 | |
c5aa993b JM |
2098 | The line number is relative to the start of the file, starting with |
2099 | line 1. | |
c906108c | 2100 | |
c5aa993b JM |
2101 | The statement position either -1 (0xFFFF) or the number of characters |
2102 | from the beginning of the line to the beginning of the statement. | |
c906108c | 2103 | |
c5aa993b JM |
2104 | The address delta is the difference between the base address and |
2105 | the address of the first instruction for the statement. | |
c906108c | 2106 | |
c5aa993b JM |
2107 | Note that we must copy the bytes from the packed table to our local |
2108 | variables before attempting to use them, to avoid alignment problems | |
2109 | on some machines, particularly RISC processors. | |
c906108c | 2110 | |
c5aa993b | 2111 | BUGS |
c906108c | 2112 | |
c5aa993b JM |
2113 | Does gdb expect the line numbers to be sorted? They are now by |
2114 | chance/luck, but are not required to be. (FIXME) | |
c906108c | 2115 | |
c5aa993b JM |
2116 | The line with number 0 is unused, gdb apparently can discover the |
2117 | span of the last line some other way. How? (FIXME) | |
c906108c SS |
2118 | */ |
2119 | ||
2120 | static void | |
2121 | decode_line_numbers (linetable) | |
2122 | char *linetable; | |
2123 | { | |
2124 | char *tblscan; | |
2125 | char *tblend; | |
2126 | unsigned long length; | |
2127 | unsigned long base; | |
2128 | unsigned long line; | |
2129 | unsigned long pc; | |
c5aa993b | 2130 | |
c906108c SS |
2131 | if (linetable != NULL) |
2132 | { | |
2133 | tblscan = tblend = linetable; | |
2134 | length = target_to_host (tblscan, SIZEOF_LINETBL_LENGTH, GET_UNSIGNED, | |
2135 | current_objfile); | |
2136 | tblscan += SIZEOF_LINETBL_LENGTH; | |
2137 | tblend += length; | |
2138 | base = target_to_host (tblscan, TARGET_FT_POINTER_SIZE (objfile), | |
2139 | GET_UNSIGNED, current_objfile); | |
2140 | tblscan += TARGET_FT_POINTER_SIZE (objfile); | |
2141 | base += baseaddr; | |
2142 | while (tblscan < tblend) | |
2143 | { | |
2144 | line = target_to_host (tblscan, SIZEOF_LINETBL_LINENO, GET_UNSIGNED, | |
2145 | current_objfile); | |
2146 | tblscan += SIZEOF_LINETBL_LINENO + SIZEOF_LINETBL_STMT; | |
2147 | pc = target_to_host (tblscan, SIZEOF_LINETBL_DELTA, GET_UNSIGNED, | |
2148 | current_objfile); | |
2149 | tblscan += SIZEOF_LINETBL_DELTA; | |
2150 | pc += base; | |
2151 | if (line != 0) | |
2152 | { | |
2153 | record_line (current_subfile, line, pc); | |
2154 | } | |
2155 | } | |
2156 | } | |
2157 | } | |
2158 | ||
2159 | /* | |
2160 | ||
c5aa993b | 2161 | LOCAL FUNCTION |
c906108c | 2162 | |
c5aa993b | 2163 | locval -- compute the value of a location attribute |
c906108c | 2164 | |
c5aa993b | 2165 | SYNOPSIS |
c906108c | 2166 | |
c5aa993b | 2167 | static int locval (struct dieinfo *dip) |
c906108c | 2168 | |
c5aa993b | 2169 | DESCRIPTION |
c906108c | 2170 | |
c5aa993b JM |
2171 | Given pointer to a string of bytes that define a location, compute |
2172 | the location and return the value. | |
2173 | A location description containing no atoms indicates that the | |
2174 | object is optimized out. The optimized_out flag is set for those, | |
2175 | the return value is meaningless. | |
c906108c | 2176 | |
c5aa993b JM |
2177 | When computing values involving the current value of the frame pointer, |
2178 | the value zero is used, which results in a value relative to the frame | |
2179 | pointer, rather than the absolute value. This is what GDB wants | |
2180 | anyway. | |
c906108c | 2181 | |
c5aa993b JM |
2182 | When the result is a register number, the isreg flag is set, otherwise |
2183 | it is cleared. This is a kludge until we figure out a better | |
2184 | way to handle the problem. Gdb's design does not mesh well with the | |
2185 | DWARF notion of a location computing interpreter, which is a shame | |
2186 | because the flexibility goes unused. | |
2187 | ||
2188 | NOTES | |
2189 | ||
2190 | Note that stack[0] is unused except as a default error return. | |
2191 | Note that stack overflow is not yet handled. | |
c906108c SS |
2192 | */ |
2193 | ||
2194 | static int | |
2195 | locval (dip) | |
2196 | struct dieinfo *dip; | |
2197 | { | |
2198 | unsigned short nbytes; | |
2199 | unsigned short locsize; | |
2200 | auto long stack[64]; | |
2201 | int stacki; | |
2202 | char *loc; | |
2203 | char *end; | |
2204 | int loc_atom_code; | |
2205 | int loc_value_size; | |
c5aa993b JM |
2206 | |
2207 | loc = dip->at_location; | |
c906108c SS |
2208 | nbytes = attribute_size (AT_location); |
2209 | locsize = target_to_host (loc, nbytes, GET_UNSIGNED, current_objfile); | |
2210 | loc += nbytes; | |
2211 | end = loc + locsize; | |
2212 | stacki = 0; | |
2213 | stack[stacki] = 0; | |
c5aa993b JM |
2214 | dip->isreg = 0; |
2215 | dip->offreg = 0; | |
2216 | dip->optimized_out = 1; | |
c906108c SS |
2217 | loc_value_size = TARGET_FT_LONG_SIZE (current_objfile); |
2218 | while (loc < end) | |
2219 | { | |
c5aa993b | 2220 | dip->optimized_out = 0; |
c906108c SS |
2221 | loc_atom_code = target_to_host (loc, SIZEOF_LOC_ATOM_CODE, GET_UNSIGNED, |
2222 | current_objfile); | |
2223 | loc += SIZEOF_LOC_ATOM_CODE; | |
2224 | switch (loc_atom_code) | |
2225 | { | |
c5aa993b JM |
2226 | case 0: |
2227 | /* error */ | |
2228 | loc = end; | |
2229 | break; | |
2230 | case OP_REG: | |
2231 | /* push register (number) */ | |
2232 | stack[++stacki] | |
2233 | = DWARF_REG_TO_REGNUM (target_to_host (loc, loc_value_size, | |
2234 | GET_UNSIGNED, | |
2235 | current_objfile)); | |
2236 | loc += loc_value_size; | |
2237 | dip->isreg = 1; | |
2238 | break; | |
2239 | case OP_BASEREG: | |
2240 | /* push value of register (number) */ | |
2241 | /* Actually, we compute the value as if register has 0, so the | |
2242 | value ends up being the offset from that register. */ | |
2243 | dip->offreg = 1; | |
2244 | dip->basereg = target_to_host (loc, loc_value_size, GET_UNSIGNED, | |
2245 | current_objfile); | |
2246 | loc += loc_value_size; | |
2247 | stack[++stacki] = 0; | |
2248 | break; | |
2249 | case OP_ADDR: | |
2250 | /* push address (relocated address) */ | |
2251 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2252 | GET_UNSIGNED, current_objfile); | |
2253 | loc += loc_value_size; | |
2254 | break; | |
2255 | case OP_CONST: | |
2256 | /* push constant (number) FIXME: signed or unsigned! */ | |
2257 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2258 | GET_SIGNED, current_objfile); | |
2259 | loc += loc_value_size; | |
2260 | break; | |
2261 | case OP_DEREF2: | |
2262 | /* pop, deref and push 2 bytes (as a long) */ | |
2263 | complain (&op_deref2, DIE_ID, DIE_NAME, stack[stacki]); | |
2264 | break; | |
2265 | case OP_DEREF4: /* pop, deref and push 4 bytes (as a long) */ | |
2266 | complain (&op_deref4, DIE_ID, DIE_NAME, stack[stacki]); | |
2267 | break; | |
2268 | case OP_ADD: /* pop top 2 items, add, push result */ | |
2269 | stack[stacki - 1] += stack[stacki]; | |
2270 | stacki--; | |
2271 | break; | |
c906108c SS |
2272 | } |
2273 | } | |
2274 | return (stack[stacki]); | |
2275 | } | |
2276 | ||
2277 | /* | |
2278 | ||
c5aa993b | 2279 | LOCAL FUNCTION |
c906108c | 2280 | |
c5aa993b | 2281 | read_ofile_symtab -- build a full symtab entry from chunk of DIE's |
c906108c | 2282 | |
c5aa993b | 2283 | SYNOPSIS |
c906108c | 2284 | |
c5aa993b | 2285 | static void read_ofile_symtab (struct partial_symtab *pst) |
c906108c | 2286 | |
c5aa993b | 2287 | DESCRIPTION |
c906108c | 2288 | |
c5aa993b JM |
2289 | When expanding a partial symbol table entry to a full symbol table |
2290 | entry, this is the function that gets called to read in the symbols | |
2291 | for the compilation unit. A pointer to the newly constructed symtab, | |
2292 | which is now the new first one on the objfile's symtab list, is | |
2293 | stashed in the partial symbol table entry. | |
c906108c SS |
2294 | */ |
2295 | ||
2296 | static void | |
2297 | read_ofile_symtab (pst) | |
2298 | struct partial_symtab *pst; | |
2299 | { | |
2300 | struct cleanup *back_to; | |
2301 | unsigned long lnsize; | |
2302 | file_ptr foffset; | |
2303 | bfd *abfd; | |
2304 | char lnsizedata[SIZEOF_LINETBL_LENGTH]; | |
2305 | ||
c5aa993b JM |
2306 | abfd = pst->objfile->obfd; |
2307 | current_objfile = pst->objfile; | |
c906108c SS |
2308 | |
2309 | /* Allocate a buffer for the entire chunk of DIE's for this compilation | |
2310 | unit, seek to the location in the file, and read in all the DIE's. */ | |
2311 | ||
2312 | diecount = 0; | |
2313 | dbsize = DBLENGTH (pst); | |
2314 | dbbase = xmalloc (dbsize); | |
c5aa993b JM |
2315 | dbroff = DBROFF (pst); |
2316 | foffset = DBFOFF (pst) + dbroff; | |
c906108c SS |
2317 | base_section_offsets = pst->section_offsets; |
2318 | baseaddr = ANOFFSET (pst->section_offsets, 0); | |
2319 | if (bfd_seek (abfd, foffset, SEEK_SET) || | |
2320 | (bfd_read (dbbase, dbsize, 1, abfd) != dbsize)) | |
2321 | { | |
2322 | free (dbbase); | |
2323 | error ("can't read DWARF data"); | |
2324 | } | |
2325 | back_to = make_cleanup (free, dbbase); | |
2326 | ||
2327 | /* If there is a line number table associated with this compilation unit | |
2328 | then read the size of this fragment in bytes, from the fragment itself. | |
2329 | Allocate a buffer for the fragment and read it in for future | |
2330 | processing. */ | |
2331 | ||
2332 | lnbase = NULL; | |
2333 | if (LNFOFF (pst)) | |
2334 | { | |
2335 | if (bfd_seek (abfd, LNFOFF (pst), SEEK_SET) || | |
2336 | (bfd_read ((PTR) lnsizedata, sizeof (lnsizedata), 1, abfd) != | |
2337 | sizeof (lnsizedata))) | |
2338 | { | |
2339 | error ("can't read DWARF line number table size"); | |
2340 | } | |
2341 | lnsize = target_to_host (lnsizedata, SIZEOF_LINETBL_LENGTH, | |
c5aa993b | 2342 | GET_UNSIGNED, pst->objfile); |
c906108c SS |
2343 | lnbase = xmalloc (lnsize); |
2344 | if (bfd_seek (abfd, LNFOFF (pst), SEEK_SET) || | |
2345 | (bfd_read (lnbase, lnsize, 1, abfd) != lnsize)) | |
2346 | { | |
2347 | free (lnbase); | |
2348 | error ("can't read DWARF line numbers"); | |
2349 | } | |
2350 | make_cleanup (free, lnbase); | |
2351 | } | |
2352 | ||
c5aa993b | 2353 | process_dies (dbbase, dbbase + dbsize, pst->objfile); |
c906108c SS |
2354 | do_cleanups (back_to); |
2355 | current_objfile = NULL; | |
c5aa993b | 2356 | pst->symtab = pst->objfile->symtabs; |
c906108c SS |
2357 | } |
2358 | ||
2359 | /* | |
2360 | ||
c5aa993b | 2361 | LOCAL FUNCTION |
c906108c | 2362 | |
c5aa993b | 2363 | psymtab_to_symtab_1 -- do grunt work for building a full symtab entry |
c906108c | 2364 | |
c5aa993b | 2365 | SYNOPSIS |
c906108c | 2366 | |
c5aa993b | 2367 | static void psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 2368 | |
c5aa993b | 2369 | DESCRIPTION |
c906108c | 2370 | |
c5aa993b JM |
2371 | Called once for each partial symbol table entry that needs to be |
2372 | expanded into a full symbol table entry. | |
c906108c | 2373 | |
c5aa993b | 2374 | */ |
c906108c SS |
2375 | |
2376 | static void | |
2377 | psymtab_to_symtab_1 (pst) | |
2378 | struct partial_symtab *pst; | |
2379 | { | |
2380 | int i; | |
2381 | struct cleanup *old_chain; | |
c5aa993b | 2382 | |
c906108c SS |
2383 | if (pst != NULL) |
2384 | { | |
2385 | if (pst->readin) | |
2386 | { | |
2387 | warning ("psymtab for %s already read in. Shouldn't happen.", | |
c5aa993b | 2388 | pst->filename); |
c906108c SS |
2389 | } |
2390 | else | |
2391 | { | |
2392 | /* Read in all partial symtabs on which this one is dependent */ | |
c5aa993b | 2393 | for (i = 0; i < pst->number_of_dependencies; i++) |
c906108c | 2394 | { |
c5aa993b | 2395 | if (!pst->dependencies[i]->readin) |
c906108c SS |
2396 | { |
2397 | /* Inform about additional files that need to be read in. */ | |
2398 | if (info_verbose) | |
2399 | { | |
2400 | fputs_filtered (" ", gdb_stdout); | |
2401 | wrap_here (""); | |
2402 | fputs_filtered ("and ", gdb_stdout); | |
2403 | wrap_here (""); | |
2404 | printf_filtered ("%s...", | |
c5aa993b | 2405 | pst->dependencies[i]->filename); |
c906108c | 2406 | wrap_here (""); |
c5aa993b | 2407 | gdb_flush (gdb_stdout); /* Flush output */ |
c906108c | 2408 | } |
c5aa993b | 2409 | psymtab_to_symtab_1 (pst->dependencies[i]); |
c906108c | 2410 | } |
c5aa993b JM |
2411 | } |
2412 | if (DBLENGTH (pst)) /* Otherwise it's a dummy */ | |
c906108c SS |
2413 | { |
2414 | buildsym_init (); | |
a0b3c4fd | 2415 | old_chain = make_cleanup (really_free_pendings, 0); |
c906108c SS |
2416 | read_ofile_symtab (pst); |
2417 | if (info_verbose) | |
2418 | { | |
2419 | printf_filtered ("%d DIE's, sorting...", diecount); | |
2420 | wrap_here (""); | |
2421 | gdb_flush (gdb_stdout); | |
2422 | } | |
c5aa993b | 2423 | sort_symtab_syms (pst->symtab); |
c906108c SS |
2424 | do_cleanups (old_chain); |
2425 | } | |
c5aa993b | 2426 | pst->readin = 1; |
c906108c SS |
2427 | } |
2428 | } | |
2429 | } | |
2430 | ||
2431 | /* | |
2432 | ||
c5aa993b | 2433 | LOCAL FUNCTION |
c906108c | 2434 | |
c5aa993b | 2435 | dwarf_psymtab_to_symtab -- build a full symtab entry from partial one |
c906108c | 2436 | |
c5aa993b | 2437 | SYNOPSIS |
c906108c | 2438 | |
c5aa993b | 2439 | static void dwarf_psymtab_to_symtab (struct partial_symtab *pst) |
c906108c | 2440 | |
c5aa993b | 2441 | DESCRIPTION |
c906108c | 2442 | |
c5aa993b JM |
2443 | This is the DWARF support entry point for building a full symbol |
2444 | table entry from a partial symbol table entry. We are passed a | |
2445 | pointer to the partial symbol table entry that needs to be expanded. | |
c906108c | 2446 | |
c5aa993b | 2447 | */ |
c906108c SS |
2448 | |
2449 | static void | |
2450 | dwarf_psymtab_to_symtab (pst) | |
2451 | struct partial_symtab *pst; | |
2452 | { | |
2453 | ||
2454 | if (pst != NULL) | |
2455 | { | |
c5aa993b | 2456 | if (pst->readin) |
c906108c SS |
2457 | { |
2458 | warning ("psymtab for %s already read in. Shouldn't happen.", | |
c5aa993b | 2459 | pst->filename); |
c906108c SS |
2460 | } |
2461 | else | |
2462 | { | |
c5aa993b | 2463 | if (DBLENGTH (pst) || pst->number_of_dependencies) |
c906108c SS |
2464 | { |
2465 | /* Print the message now, before starting serious work, to avoid | |
c5aa993b | 2466 | disconcerting pauses. */ |
c906108c SS |
2467 | if (info_verbose) |
2468 | { | |
2469 | printf_filtered ("Reading in symbols for %s...", | |
c5aa993b | 2470 | pst->filename); |
c906108c SS |
2471 | gdb_flush (gdb_stdout); |
2472 | } | |
c5aa993b | 2473 | |
c906108c | 2474 | psymtab_to_symtab_1 (pst); |
c5aa993b JM |
2475 | |
2476 | #if 0 /* FIXME: Check to see what dbxread is doing here and see if | |
2477 | we need to do an equivalent or is this something peculiar to | |
2478 | stabs/a.out format. | |
2479 | Match with global symbols. This only needs to be done once, | |
2480 | after all of the symtabs and dependencies have been read in. | |
2481 | */ | |
2482 | scan_file_globals (pst->objfile); | |
c906108c | 2483 | #endif |
c5aa993b | 2484 | |
c906108c SS |
2485 | /* Finish up the verbose info message. */ |
2486 | if (info_verbose) | |
2487 | { | |
2488 | printf_filtered ("done.\n"); | |
2489 | gdb_flush (gdb_stdout); | |
2490 | } | |
2491 | } | |
2492 | } | |
2493 | } | |
2494 | } | |
2495 | ||
2496 | /* | |
2497 | ||
c5aa993b | 2498 | LOCAL FUNCTION |
c906108c | 2499 | |
c5aa993b | 2500 | add_enum_psymbol -- add enumeration members to partial symbol table |
c906108c | 2501 | |
c5aa993b | 2502 | DESCRIPTION |
c906108c | 2503 | |
c5aa993b JM |
2504 | Given pointer to a DIE that is known to be for an enumeration, |
2505 | extract the symbolic names of the enumeration members and add | |
2506 | partial symbols for them. | |
2507 | */ | |
c906108c SS |
2508 | |
2509 | static void | |
2510 | add_enum_psymbol (dip, objfile) | |
2511 | struct dieinfo *dip; | |
2512 | struct objfile *objfile; | |
2513 | { | |
2514 | char *scan; | |
2515 | char *listend; | |
2516 | unsigned short blocksz; | |
2517 | int nbytes; | |
c5aa993b JM |
2518 | |
2519 | if ((scan = dip->at_element_list) != NULL) | |
c906108c | 2520 | { |
c5aa993b | 2521 | if (dip->short_element_list) |
c906108c SS |
2522 | { |
2523 | nbytes = attribute_size (AT_short_element_list); | |
2524 | } | |
2525 | else | |
2526 | { | |
2527 | nbytes = attribute_size (AT_element_list); | |
2528 | } | |
2529 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); | |
2530 | scan += nbytes; | |
2531 | listend = scan + blocksz; | |
2532 | while (scan < listend) | |
2533 | { | |
2534 | scan += TARGET_FT_LONG_SIZE (objfile); | |
2535 | add_psymbol_to_list (scan, strlen (scan), VAR_NAMESPACE, LOC_CONST, | |
c5aa993b | 2536 | &objfile->static_psymbols, 0, 0, cu_language, |
c906108c SS |
2537 | objfile); |
2538 | scan += strlen (scan) + 1; | |
2539 | } | |
2540 | } | |
2541 | } | |
2542 | ||
2543 | /* | |
2544 | ||
c5aa993b | 2545 | LOCAL FUNCTION |
c906108c | 2546 | |
c5aa993b | 2547 | add_partial_symbol -- add symbol to partial symbol table |
c906108c | 2548 | |
c5aa993b | 2549 | DESCRIPTION |
c906108c | 2550 | |
c5aa993b JM |
2551 | Given a DIE, if it is one of the types that we want to |
2552 | add to a partial symbol table, finish filling in the die info | |
2553 | and then add a partial symbol table entry for it. | |
c906108c | 2554 | |
c5aa993b | 2555 | NOTES |
c906108c | 2556 | |
c5aa993b JM |
2557 | The caller must ensure that the DIE has a valid name attribute. |
2558 | */ | |
c906108c SS |
2559 | |
2560 | static void | |
2561 | add_partial_symbol (dip, objfile) | |
2562 | struct dieinfo *dip; | |
2563 | struct objfile *objfile; | |
2564 | { | |
c5aa993b | 2565 | switch (dip->die_tag) |
c906108c SS |
2566 | { |
2567 | case TAG_global_subroutine: | |
c5aa993b JM |
2568 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
2569 | VAR_NAMESPACE, LOC_BLOCK, | |
2570 | &objfile->global_psymbols, | |
2571 | 0, dip->at_low_pc, cu_language, objfile); | |
c906108c SS |
2572 | break; |
2573 | case TAG_global_variable: | |
c5aa993b | 2574 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
c906108c | 2575 | VAR_NAMESPACE, LOC_STATIC, |
c5aa993b | 2576 | &objfile->global_psymbols, |
c906108c SS |
2577 | 0, 0, cu_language, objfile); |
2578 | break; | |
2579 | case TAG_subroutine: | |
c5aa993b JM |
2580 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
2581 | VAR_NAMESPACE, LOC_BLOCK, | |
2582 | &objfile->static_psymbols, | |
2583 | 0, dip->at_low_pc, cu_language, objfile); | |
c906108c SS |
2584 | break; |
2585 | case TAG_local_variable: | |
c5aa993b | 2586 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
c906108c | 2587 | VAR_NAMESPACE, LOC_STATIC, |
c5aa993b | 2588 | &objfile->static_psymbols, |
c906108c SS |
2589 | 0, 0, cu_language, objfile); |
2590 | break; | |
2591 | case TAG_typedef: | |
c5aa993b | 2592 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
c906108c | 2593 | VAR_NAMESPACE, LOC_TYPEDEF, |
c5aa993b | 2594 | &objfile->static_psymbols, |
c906108c SS |
2595 | 0, 0, cu_language, objfile); |
2596 | break; | |
2597 | case TAG_class_type: | |
2598 | case TAG_structure_type: | |
2599 | case TAG_union_type: | |
2600 | case TAG_enumeration_type: | |
2601 | /* Do not add opaque aggregate definitions to the psymtab. */ | |
c5aa993b | 2602 | if (!dip->has_at_byte_size) |
c906108c | 2603 | break; |
c5aa993b | 2604 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
c906108c | 2605 | STRUCT_NAMESPACE, LOC_TYPEDEF, |
c5aa993b | 2606 | &objfile->static_psymbols, |
c906108c SS |
2607 | 0, 0, cu_language, objfile); |
2608 | if (cu_language == language_cplus) | |
2609 | { | |
2610 | /* For C++, these implicitly act as typedefs as well. */ | |
c5aa993b | 2611 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
c906108c | 2612 | VAR_NAMESPACE, LOC_TYPEDEF, |
c5aa993b | 2613 | &objfile->static_psymbols, |
c906108c SS |
2614 | 0, 0, cu_language, objfile); |
2615 | } | |
2616 | break; | |
2617 | } | |
2618 | } | |
9846de1b | 2619 | /* *INDENT-OFF* */ |
c906108c SS |
2620 | /* |
2621 | ||
2622 | LOCAL FUNCTION | |
2623 | ||
2624 | scan_partial_symbols -- scan DIE's within a single compilation unit | |
2625 | ||
2626 | DESCRIPTION | |
2627 | ||
2628 | Process the DIE's within a single compilation unit, looking for | |
2629 | interesting DIE's that contribute to the partial symbol table entry | |
2630 | for this compilation unit. | |
2631 | ||
2632 | NOTES | |
2633 | ||
2634 | There are some DIE's that may appear both at file scope and within | |
2635 | the scope of a function. We are only interested in the ones at file | |
2636 | scope, and the only way to tell them apart is to keep track of the | |
2637 | scope. For example, consider the test case: | |
2638 | ||
2639 | static int i; | |
2640 | main () { int j; } | |
2641 | ||
2642 | for which the relevant DWARF segment has the structure: | |
2643 | ||
2644 | 0x51: | |
2645 | 0x23 global subrtn sibling 0x9b | |
2646 | name main | |
2647 | fund_type FT_integer | |
2648 | low_pc 0x800004cc | |
2649 | high_pc 0x800004d4 | |
2650 | ||
2651 | 0x74: | |
2652 | 0x23 local var sibling 0x97 | |
2653 | name j | |
2654 | fund_type FT_integer | |
2655 | location OP_BASEREG 0xe | |
2656 | OP_CONST 0xfffffffc | |
2657 | OP_ADD | |
2658 | 0x97: | |
2659 | 0x4 | |
2660 | ||
2661 | 0x9b: | |
2662 | 0x1d local var sibling 0xb8 | |
2663 | name i | |
2664 | fund_type FT_integer | |
2665 | location OP_ADDR 0x800025dc | |
2666 | ||
2667 | 0xb8: | |
2668 | 0x4 | |
2669 | ||
2670 | We want to include the symbol 'i' in the partial symbol table, but | |
2671 | not the symbol 'j'. In essence, we want to skip all the dies within | |
2672 | the scope of a TAG_global_subroutine DIE. | |
2673 | ||
2674 | Don't attempt to add anonymous structures or unions since they have | |
2675 | no name. Anonymous enumerations however are processed, because we | |
2676 | want to extract their member names (the check for a tag name is | |
2677 | done later). | |
2678 | ||
2679 | Also, for variables and subroutines, check that this is the place | |
2680 | where the actual definition occurs, rather than just a reference | |
2681 | to an external. | |
2682 | */ | |
9846de1b | 2683 | /* *INDENT-ON* */ |
c906108c | 2684 | |
c5aa993b JM |
2685 | |
2686 | ||
c906108c SS |
2687 | static void |
2688 | scan_partial_symbols (thisdie, enddie, objfile) | |
2689 | char *thisdie; | |
2690 | char *enddie; | |
2691 | struct objfile *objfile; | |
2692 | { | |
2693 | char *nextdie; | |
2694 | char *temp; | |
2695 | struct dieinfo di; | |
c5aa993b | 2696 | |
c906108c SS |
2697 | while (thisdie < enddie) |
2698 | { | |
2699 | basicdieinfo (&di, thisdie, objfile); | |
2700 | if (di.die_length < SIZEOF_DIE_LENGTH) | |
2701 | { | |
2702 | break; | |
2703 | } | |
2704 | else | |
2705 | { | |
2706 | nextdie = thisdie + di.die_length; | |
2707 | /* To avoid getting complete die information for every die, we | |
2708 | only do it (below) for the cases we are interested in. */ | |
2709 | switch (di.die_tag) | |
2710 | { | |
2711 | case TAG_global_subroutine: | |
2712 | case TAG_subroutine: | |
2713 | completedieinfo (&di, objfile); | |
2714 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2715 | { | |
2716 | add_partial_symbol (&di, objfile); | |
2717 | /* If there is a sibling attribute, adjust the nextdie | |
2718 | pointer to skip the entire scope of the subroutine. | |
2719 | Apply some sanity checking to make sure we don't | |
2720 | overrun or underrun the range of remaining DIE's */ | |
2721 | if (di.at_sibling != 0) | |
2722 | { | |
2723 | temp = dbbase + di.at_sibling - dbroff; | |
2724 | if ((temp < thisdie) || (temp >= enddie)) | |
2725 | { | |
2726 | complain (&bad_die_ref, DIE_ID, DIE_NAME, | |
2727 | di.at_sibling); | |
2728 | } | |
2729 | else | |
2730 | { | |
2731 | nextdie = temp; | |
2732 | } | |
2733 | } | |
2734 | } | |
2735 | break; | |
2736 | case TAG_global_variable: | |
2737 | case TAG_local_variable: | |
2738 | completedieinfo (&di, objfile); | |
2739 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2740 | { | |
2741 | add_partial_symbol (&di, objfile); | |
2742 | } | |
2743 | break; | |
2744 | case TAG_typedef: | |
2745 | case TAG_class_type: | |
2746 | case TAG_structure_type: | |
2747 | case TAG_union_type: | |
2748 | completedieinfo (&di, objfile); | |
2749 | if (di.at_name) | |
2750 | { | |
2751 | add_partial_symbol (&di, objfile); | |
2752 | } | |
2753 | break; | |
2754 | case TAG_enumeration_type: | |
2755 | completedieinfo (&di, objfile); | |
2756 | if (di.at_name) | |
2757 | { | |
2758 | add_partial_symbol (&di, objfile); | |
2759 | } | |
2760 | add_enum_psymbol (&di, objfile); | |
2761 | break; | |
2762 | } | |
2763 | } | |
2764 | thisdie = nextdie; | |
2765 | } | |
2766 | } | |
2767 | ||
2768 | /* | |
2769 | ||
c5aa993b | 2770 | LOCAL FUNCTION |
c906108c | 2771 | |
c5aa993b | 2772 | scan_compilation_units -- build a psymtab entry for each compilation |
c906108c | 2773 | |
c5aa993b | 2774 | DESCRIPTION |
c906108c | 2775 | |
c5aa993b JM |
2776 | This is the top level dwarf parsing routine for building partial |
2777 | symbol tables. | |
c906108c | 2778 | |
c5aa993b JM |
2779 | It scans from the beginning of the DWARF table looking for the first |
2780 | TAG_compile_unit DIE, and then follows the sibling chain to locate | |
2781 | each additional TAG_compile_unit DIE. | |
2782 | ||
2783 | For each TAG_compile_unit DIE it creates a partial symtab structure, | |
2784 | calls a subordinate routine to collect all the compilation unit's | |
2785 | global DIE's, file scope DIEs, typedef DIEs, etc, and then links the | |
2786 | new partial symtab structure into the partial symbol table. It also | |
2787 | records the appropriate information in the partial symbol table entry | |
2788 | to allow the chunk of DIE's and line number table for this compilation | |
2789 | unit to be located and re-read later, to generate a complete symbol | |
2790 | table entry for the compilation unit. | |
2791 | ||
2792 | Thus it effectively partitions up a chunk of DIE's for multiple | |
2793 | compilation units into smaller DIE chunks and line number tables, | |
2794 | and associates them with a partial symbol table entry. | |
2795 | ||
2796 | NOTES | |
c906108c | 2797 | |
c5aa993b JM |
2798 | If any compilation unit has no line number table associated with |
2799 | it for some reason (a missing at_stmt_list attribute, rather than | |
2800 | just one with a value of zero, which is valid) then we ensure that | |
2801 | the recorded file offset is zero so that the routine which later | |
2802 | reads line number table fragments knows that there is no fragment | |
2803 | to read. | |
c906108c | 2804 | |
c5aa993b | 2805 | RETURNS |
c906108c | 2806 | |
c5aa993b | 2807 | Returns no value. |
c906108c SS |
2808 | |
2809 | */ | |
2810 | ||
2811 | static void | |
2812 | scan_compilation_units (thisdie, enddie, dbfoff, lnoffset, objfile) | |
2813 | char *thisdie; | |
2814 | char *enddie; | |
2815 | file_ptr dbfoff; | |
2816 | file_ptr lnoffset; | |
2817 | struct objfile *objfile; | |
2818 | { | |
2819 | char *nextdie; | |
2820 | struct dieinfo di; | |
2821 | struct partial_symtab *pst; | |
2822 | int culength; | |
2823 | int curoff; | |
2824 | file_ptr curlnoffset; | |
2825 | ||
2826 | while (thisdie < enddie) | |
2827 | { | |
2828 | basicdieinfo (&di, thisdie, objfile); | |
2829 | if (di.die_length < SIZEOF_DIE_LENGTH) | |
2830 | { | |
2831 | break; | |
2832 | } | |
2833 | else if (di.die_tag != TAG_compile_unit) | |
2834 | { | |
2835 | nextdie = thisdie + di.die_length; | |
2836 | } | |
2837 | else | |
2838 | { | |
2839 | completedieinfo (&di, objfile); | |
2840 | set_cu_language (&di); | |
2841 | if (di.at_sibling != 0) | |
2842 | { | |
2843 | nextdie = dbbase + di.at_sibling - dbroff; | |
2844 | } | |
2845 | else | |
2846 | { | |
2847 | nextdie = thisdie + di.die_length; | |
2848 | } | |
2849 | curoff = thisdie - dbbase; | |
2850 | culength = nextdie - thisdie; | |
2851 | curlnoffset = di.has_at_stmt_list ? lnoffset + di.at_stmt_list : 0; | |
2852 | ||
2853 | /* First allocate a new partial symbol table structure */ | |
2854 | ||
2855 | pst = start_psymtab_common (objfile, base_section_offsets, | |
2856 | di.at_name, di.at_low_pc, | |
c5aa993b JM |
2857 | objfile->global_psymbols.next, |
2858 | objfile->static_psymbols.next); | |
c906108c | 2859 | |
c5aa993b JM |
2860 | pst->texthigh = di.at_high_pc; |
2861 | pst->read_symtab_private = (char *) | |
2862 | obstack_alloc (&objfile->psymbol_obstack, | |
2863 | sizeof (struct dwfinfo)); | |
c906108c SS |
2864 | DBFOFF (pst) = dbfoff; |
2865 | DBROFF (pst) = curoff; | |
2866 | DBLENGTH (pst) = culength; | |
c5aa993b JM |
2867 | LNFOFF (pst) = curlnoffset; |
2868 | pst->read_symtab = dwarf_psymtab_to_symtab; | |
c906108c SS |
2869 | |
2870 | /* Now look for partial symbols */ | |
2871 | ||
2872 | scan_partial_symbols (thisdie + di.die_length, nextdie, objfile); | |
2873 | ||
c5aa993b JM |
2874 | pst->n_global_syms = objfile->global_psymbols.next - |
2875 | (objfile->global_psymbols.list + pst->globals_offset); | |
2876 | pst->n_static_syms = objfile->static_psymbols.next - | |
2877 | (objfile->static_psymbols.list + pst->statics_offset); | |
c906108c SS |
2878 | sort_pst_symbols (pst); |
2879 | /* If there is already a psymtab or symtab for a file of this name, | |
2880 | remove it. (If there is a symtab, more drastic things also | |
2881 | happen.) This happens in VxWorks. */ | |
c5aa993b | 2882 | free_named_symtabs (pst->filename); |
c906108c | 2883 | } |
c5aa993b | 2884 | thisdie = nextdie; |
c906108c SS |
2885 | } |
2886 | } | |
2887 | ||
2888 | /* | |
2889 | ||
c5aa993b | 2890 | LOCAL FUNCTION |
c906108c | 2891 | |
c5aa993b | 2892 | new_symbol -- make a symbol table entry for a new symbol |
c906108c | 2893 | |
c5aa993b | 2894 | SYNOPSIS |
c906108c | 2895 | |
c5aa993b JM |
2896 | static struct symbol *new_symbol (struct dieinfo *dip, |
2897 | struct objfile *objfile) | |
c906108c | 2898 | |
c5aa993b | 2899 | DESCRIPTION |
c906108c | 2900 | |
c5aa993b JM |
2901 | Given a pointer to a DWARF information entry, figure out if we need |
2902 | to make a symbol table entry for it, and if so, create a new entry | |
2903 | and return a pointer to it. | |
c906108c SS |
2904 | */ |
2905 | ||
2906 | static struct symbol * | |
2907 | new_symbol (dip, objfile) | |
2908 | struct dieinfo *dip; | |
2909 | struct objfile *objfile; | |
2910 | { | |
2911 | struct symbol *sym = NULL; | |
c5aa993b JM |
2912 | |
2913 | if (dip->at_name != NULL) | |
c906108c | 2914 | { |
c5aa993b | 2915 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
c906108c SS |
2916 | sizeof (struct symbol)); |
2917 | OBJSTAT (objfile, n_syms++); | |
2918 | memset (sym, 0, sizeof (struct symbol)); | |
c5aa993b | 2919 | SYMBOL_NAME (sym) = create_name (dip->at_name, |
c906108c SS |
2920 | &objfile->symbol_obstack); |
2921 | /* default assumptions */ | |
2922 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2923 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2924 | SYMBOL_TYPE (sym) = decode_die_type (dip); | |
2925 | ||
2926 | /* If this symbol is from a C++ compilation, then attempt to cache the | |
c5aa993b JM |
2927 | demangled form for future reference. This is a typical time versus |
2928 | space tradeoff, that was decided in favor of time because it sped up | |
2929 | C++ symbol lookups by a factor of about 20. */ | |
c906108c SS |
2930 | |
2931 | SYMBOL_LANGUAGE (sym) = cu_language; | |
c5aa993b JM |
2932 | SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack); |
2933 | switch (dip->die_tag) | |
c906108c SS |
2934 | { |
2935 | case TAG_label: | |
c5aa993b | 2936 | SYMBOL_VALUE_ADDRESS (sym) = dip->at_low_pc; |
c906108c SS |
2937 | SYMBOL_CLASS (sym) = LOC_LABEL; |
2938 | break; | |
2939 | case TAG_global_subroutine: | |
2940 | case TAG_subroutine: | |
c5aa993b | 2941 | SYMBOL_VALUE_ADDRESS (sym) = dip->at_low_pc; |
c906108c | 2942 | SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym)); |
c5aa993b | 2943 | if (dip->at_prototyped) |
c906108c SS |
2944 | TYPE_FLAGS (SYMBOL_TYPE (sym)) |= TYPE_FLAG_PROTOTYPED; |
2945 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
c5aa993b | 2946 | if (dip->die_tag == TAG_global_subroutine) |
c906108c SS |
2947 | { |
2948 | add_symbol_to_list (sym, &global_symbols); | |
2949 | } | |
2950 | else | |
2951 | { | |
2952 | add_symbol_to_list (sym, list_in_scope); | |
2953 | } | |
2954 | break; | |
2955 | case TAG_global_variable: | |
c5aa993b | 2956 | if (dip->at_location != NULL) |
c906108c SS |
2957 | { |
2958 | SYMBOL_VALUE_ADDRESS (sym) = locval (dip); | |
2959 | add_symbol_to_list (sym, &global_symbols); | |
2960 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2961 | SYMBOL_VALUE (sym) += baseaddr; | |
2962 | } | |
2963 | break; | |
2964 | case TAG_local_variable: | |
c5aa993b | 2965 | if (dip->at_location != NULL) |
c906108c SS |
2966 | { |
2967 | int loc = locval (dip); | |
c5aa993b | 2968 | if (dip->optimized_out) |
c906108c SS |
2969 | { |
2970 | SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; | |
2971 | } | |
c5aa993b | 2972 | else if (dip->isreg) |
c906108c SS |
2973 | { |
2974 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
2975 | } | |
c5aa993b | 2976 | else if (dip->offreg) |
c906108c SS |
2977 | { |
2978 | SYMBOL_CLASS (sym) = LOC_BASEREG; | |
c5aa993b | 2979 | SYMBOL_BASEREG (sym) = dip->basereg; |
c906108c SS |
2980 | } |
2981 | else | |
2982 | { | |
2983 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2984 | SYMBOL_VALUE (sym) += baseaddr; | |
2985 | } | |
2986 | if (SYMBOL_CLASS (sym) == LOC_STATIC) | |
2987 | { | |
2988 | /* LOC_STATIC address class MUST use SYMBOL_VALUE_ADDRESS, | |
2989 | which may store to a bigger location than SYMBOL_VALUE. */ | |
2990 | SYMBOL_VALUE_ADDRESS (sym) = loc; | |
2991 | } | |
2992 | else | |
2993 | { | |
2994 | SYMBOL_VALUE (sym) = loc; | |
2995 | } | |
2996 | add_symbol_to_list (sym, list_in_scope); | |
2997 | } | |
2998 | break; | |
2999 | case TAG_formal_parameter: | |
c5aa993b | 3000 | if (dip->at_location != NULL) |
c906108c SS |
3001 | { |
3002 | SYMBOL_VALUE (sym) = locval (dip); | |
3003 | } | |
3004 | add_symbol_to_list (sym, list_in_scope); | |
c5aa993b | 3005 | if (dip->isreg) |
c906108c SS |
3006 | { |
3007 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
3008 | } | |
c5aa993b | 3009 | else if (dip->offreg) |
c906108c SS |
3010 | { |
3011 | SYMBOL_CLASS (sym) = LOC_BASEREG_ARG; | |
c5aa993b | 3012 | SYMBOL_BASEREG (sym) = dip->basereg; |
c906108c SS |
3013 | } |
3014 | else | |
3015 | { | |
3016 | SYMBOL_CLASS (sym) = LOC_ARG; | |
3017 | } | |
3018 | break; | |
3019 | case TAG_unspecified_parameters: | |
3020 | /* From varargs functions; gdb doesn't seem to have any interest in | |
3021 | this information, so just ignore it for now. (FIXME?) */ | |
3022 | break; | |
3023 | case TAG_class_type: | |
3024 | case TAG_structure_type: | |
3025 | case TAG_union_type: | |
3026 | case TAG_enumeration_type: | |
3027 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3028 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
3029 | add_symbol_to_list (sym, list_in_scope); | |
3030 | break; | |
3031 | case TAG_typedef: | |
3032 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3033 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
3034 | add_symbol_to_list (sym, list_in_scope); | |
3035 | break; | |
3036 | default: | |
3037 | /* Not a tag we recognize. Hopefully we aren't processing trash | |
3038 | data, but since we must specifically ignore things we don't | |
3039 | recognize, there is nothing else we should do at this point. */ | |
3040 | break; | |
3041 | } | |
3042 | } | |
3043 | return (sym); | |
3044 | } | |
3045 | ||
3046 | /* | |
3047 | ||
c5aa993b | 3048 | LOCAL FUNCTION |
c906108c | 3049 | |
c5aa993b | 3050 | synthesize_typedef -- make a symbol table entry for a "fake" typedef |
c906108c | 3051 | |
c5aa993b | 3052 | SYNOPSIS |
c906108c | 3053 | |
c5aa993b JM |
3054 | static void synthesize_typedef (struct dieinfo *dip, |
3055 | struct objfile *objfile, | |
3056 | struct type *type); | |
c906108c | 3057 | |
c5aa993b | 3058 | DESCRIPTION |
c906108c | 3059 | |
c5aa993b JM |
3060 | Given a pointer to a DWARF information entry, synthesize a typedef |
3061 | for the name in the DIE, using the specified type. | |
c906108c | 3062 | |
c5aa993b JM |
3063 | This is used for C++ class, structs, unions, and enumerations to |
3064 | set up the tag name as a type. | |
c906108c SS |
3065 | |
3066 | */ | |
3067 | ||
3068 | static void | |
3069 | synthesize_typedef (dip, objfile, type) | |
3070 | struct dieinfo *dip; | |
3071 | struct objfile *objfile; | |
3072 | struct type *type; | |
3073 | { | |
3074 | struct symbol *sym = NULL; | |
c5aa993b JM |
3075 | |
3076 | if (dip->at_name != NULL) | |
c906108c SS |
3077 | { |
3078 | sym = (struct symbol *) | |
c5aa993b | 3079 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); |
c906108c SS |
3080 | OBJSTAT (objfile, n_syms++); |
3081 | memset (sym, 0, sizeof (struct symbol)); | |
c5aa993b | 3082 | SYMBOL_NAME (sym) = create_name (dip->at_name, |
c906108c SS |
3083 | &objfile->symbol_obstack); |
3084 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); | |
3085 | SYMBOL_TYPE (sym) = type; | |
3086 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3087 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
3088 | add_symbol_to_list (sym, list_in_scope); | |
3089 | } | |
3090 | } | |
3091 | ||
3092 | /* | |
3093 | ||
c5aa993b | 3094 | LOCAL FUNCTION |
c906108c | 3095 | |
c5aa993b | 3096 | decode_mod_fund_type -- decode a modified fundamental type |
c906108c | 3097 | |
c5aa993b | 3098 | SYNOPSIS |
c906108c | 3099 | |
c5aa993b | 3100 | static struct type *decode_mod_fund_type (char *typedata) |
c906108c | 3101 | |
c5aa993b | 3102 | DESCRIPTION |
c906108c | 3103 | |
c5aa993b JM |
3104 | Decode a block of data containing a modified fundamental |
3105 | type specification. TYPEDATA is a pointer to the block, | |
3106 | which starts with a length containing the size of the rest | |
3107 | of the block. At the end of the block is a fundmental type | |
3108 | code value that gives the fundamental type. Everything | |
3109 | in between are type modifiers. | |
c906108c | 3110 | |
c5aa993b JM |
3111 | We simply compute the number of modifiers and call the general |
3112 | function decode_modified_type to do the actual work. | |
3113 | */ | |
c906108c SS |
3114 | |
3115 | static struct type * | |
3116 | decode_mod_fund_type (typedata) | |
3117 | char *typedata; | |
3118 | { | |
3119 | struct type *typep = NULL; | |
3120 | unsigned short modcount; | |
3121 | int nbytes; | |
c5aa993b | 3122 | |
c906108c SS |
3123 | /* Get the total size of the block, exclusive of the size itself */ |
3124 | ||
3125 | nbytes = attribute_size (AT_mod_fund_type); | |
3126 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3127 | typedata += nbytes; | |
3128 | ||
3129 | /* Deduct the size of the fundamental type bytes at the end of the block. */ | |
3130 | ||
3131 | modcount -= attribute_size (AT_fund_type); | |
3132 | ||
3133 | /* Now do the actual decoding */ | |
3134 | ||
3135 | typep = decode_modified_type (typedata, modcount, AT_mod_fund_type); | |
3136 | return (typep); | |
3137 | } | |
3138 | ||
3139 | /* | |
3140 | ||
c5aa993b | 3141 | LOCAL FUNCTION |
c906108c | 3142 | |
c5aa993b | 3143 | decode_mod_u_d_type -- decode a modified user defined type |
c906108c | 3144 | |
c5aa993b | 3145 | SYNOPSIS |
c906108c | 3146 | |
c5aa993b | 3147 | static struct type *decode_mod_u_d_type (char *typedata) |
c906108c | 3148 | |
c5aa993b | 3149 | DESCRIPTION |
c906108c | 3150 | |
c5aa993b JM |
3151 | Decode a block of data containing a modified user defined |
3152 | type specification. TYPEDATA is a pointer to the block, | |
3153 | which consists of a two byte length, containing the size | |
3154 | of the rest of the block. At the end of the block is a | |
3155 | four byte value that gives a reference to a user defined type. | |
3156 | Everything in between are type modifiers. | |
c906108c | 3157 | |
c5aa993b JM |
3158 | We simply compute the number of modifiers and call the general |
3159 | function decode_modified_type to do the actual work. | |
3160 | */ | |
c906108c SS |
3161 | |
3162 | static struct type * | |
3163 | decode_mod_u_d_type (typedata) | |
3164 | char *typedata; | |
3165 | { | |
3166 | struct type *typep = NULL; | |
3167 | unsigned short modcount; | |
3168 | int nbytes; | |
c5aa993b | 3169 | |
c906108c SS |
3170 | /* Get the total size of the block, exclusive of the size itself */ |
3171 | ||
3172 | nbytes = attribute_size (AT_mod_u_d_type); | |
3173 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3174 | typedata += nbytes; | |
3175 | ||
3176 | /* Deduct the size of the reference type bytes at the end of the block. */ | |
3177 | ||
3178 | modcount -= attribute_size (AT_user_def_type); | |
3179 | ||
3180 | /* Now do the actual decoding */ | |
3181 | ||
3182 | typep = decode_modified_type (typedata, modcount, AT_mod_u_d_type); | |
3183 | return (typep); | |
3184 | } | |
3185 | ||
3186 | /* | |
3187 | ||
c5aa993b | 3188 | LOCAL FUNCTION |
c906108c | 3189 | |
c5aa993b | 3190 | decode_modified_type -- decode modified user or fundamental type |
c906108c | 3191 | |
c5aa993b | 3192 | SYNOPSIS |
c906108c | 3193 | |
c5aa993b JM |
3194 | static struct type *decode_modified_type (char *modifiers, |
3195 | unsigned short modcount, int mtype) | |
c906108c | 3196 | |
c5aa993b | 3197 | DESCRIPTION |
c906108c | 3198 | |
c5aa993b JM |
3199 | Decode a modified type, either a modified fundamental type or |
3200 | a modified user defined type. MODIFIERS is a pointer to the | |
3201 | block of bytes that define MODCOUNT modifiers. Immediately | |
3202 | following the last modifier is a short containing the fundamental | |
3203 | type or a long containing the reference to the user defined | |
3204 | type. Which one is determined by MTYPE, which is either | |
3205 | AT_mod_fund_type or AT_mod_u_d_type to indicate what modified | |
3206 | type we are generating. | |
c906108c | 3207 | |
c5aa993b JM |
3208 | We call ourself recursively to generate each modified type,` |
3209 | until MODCOUNT reaches zero, at which point we have consumed | |
3210 | all the modifiers and generate either the fundamental type or | |
3211 | user defined type. When the recursion unwinds, each modifier | |
3212 | is applied in turn to generate the full modified type. | |
3213 | ||
3214 | NOTES | |
c906108c | 3215 | |
c5aa993b JM |
3216 | If we find a modifier that we don't recognize, and it is not one |
3217 | of those reserved for application specific use, then we issue a | |
3218 | warning and simply ignore the modifier. | |
c906108c | 3219 | |
c5aa993b | 3220 | BUGS |
c906108c | 3221 | |
c5aa993b | 3222 | We currently ignore MOD_const and MOD_volatile. (FIXME) |
c906108c SS |
3223 | |
3224 | */ | |
3225 | ||
3226 | static struct type * | |
3227 | decode_modified_type (modifiers, modcount, mtype) | |
3228 | char *modifiers; | |
3229 | unsigned int modcount; | |
3230 | int mtype; | |
3231 | { | |
3232 | struct type *typep = NULL; | |
3233 | unsigned short fundtype; | |
3234 | DIE_REF die_ref; | |
3235 | char modifier; | |
3236 | int nbytes; | |
c5aa993b | 3237 | |
c906108c SS |
3238 | if (modcount == 0) |
3239 | { | |
3240 | switch (mtype) | |
3241 | { | |
3242 | case AT_mod_fund_type: | |
3243 | nbytes = attribute_size (AT_fund_type); | |
3244 | fundtype = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3245 | current_objfile); | |
3246 | typep = decode_fund_type (fundtype); | |
3247 | break; | |
3248 | case AT_mod_u_d_type: | |
3249 | nbytes = attribute_size (AT_user_def_type); | |
3250 | die_ref = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3251 | current_objfile); | |
3252 | if ((typep = lookup_utype (die_ref)) == NULL) | |
3253 | { | |
3254 | typep = alloc_utype (die_ref, NULL); | |
3255 | } | |
3256 | break; | |
3257 | default: | |
3258 | complain (&botched_modified_type, DIE_ID, DIE_NAME, mtype); | |
3259 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
3260 | break; | |
3261 | } | |
3262 | } | |
3263 | else | |
3264 | { | |
3265 | modifier = *modifiers++; | |
3266 | typep = decode_modified_type (modifiers, --modcount, mtype); | |
3267 | switch (modifier) | |
3268 | { | |
c5aa993b JM |
3269 | case MOD_pointer_to: |
3270 | typep = lookup_pointer_type (typep); | |
3271 | break; | |
3272 | case MOD_reference_to: | |
3273 | typep = lookup_reference_type (typep); | |
3274 | break; | |
3275 | case MOD_const: | |
3276 | complain (&const_ignored, DIE_ID, DIE_NAME); /* FIXME */ | |
3277 | break; | |
3278 | case MOD_volatile: | |
3279 | complain (&volatile_ignored, DIE_ID, DIE_NAME); /* FIXME */ | |
3280 | break; | |
3281 | default: | |
3282 | if (!(MOD_lo_user <= (unsigned char) modifier | |
3283 | && (unsigned char) modifier <= MOD_hi_user)) | |
3284 | { | |
3285 | complain (&unknown_type_modifier, DIE_ID, DIE_NAME, modifier); | |
3286 | } | |
3287 | break; | |
c906108c SS |
3288 | } |
3289 | } | |
3290 | return (typep); | |
3291 | } | |
3292 | ||
3293 | /* | |
3294 | ||
c5aa993b | 3295 | LOCAL FUNCTION |
c906108c | 3296 | |
c5aa993b | 3297 | decode_fund_type -- translate basic DWARF type to gdb base type |
c906108c | 3298 | |
c5aa993b | 3299 | DESCRIPTION |
c906108c | 3300 | |
c5aa993b JM |
3301 | Given an integer that is one of the fundamental DWARF types, |
3302 | translate it to one of the basic internal gdb types and return | |
3303 | a pointer to the appropriate gdb type (a "struct type *"). | |
c906108c | 3304 | |
c5aa993b | 3305 | NOTES |
c906108c | 3306 | |
c5aa993b JM |
3307 | For robustness, if we are asked to translate a fundamental |
3308 | type that we are unprepared to deal with, we return int so | |
3309 | callers can always depend upon a valid type being returned, | |
3310 | and so gdb may at least do something reasonable by default. | |
3311 | If the type is not in the range of those types defined as | |
3312 | application specific types, we also issue a warning. | |
3313 | */ | |
c906108c SS |
3314 | |
3315 | static struct type * | |
3316 | decode_fund_type (fundtype) | |
3317 | unsigned int fundtype; | |
3318 | { | |
3319 | struct type *typep = NULL; | |
c5aa993b | 3320 | |
c906108c SS |
3321 | switch (fundtype) |
3322 | { | |
3323 | ||
3324 | case FT_void: | |
3325 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); | |
3326 | break; | |
c5aa993b | 3327 | |
c906108c SS |
3328 | case FT_boolean: /* Was FT_set in AT&T version */ |
3329 | typep = dwarf_fundamental_type (current_objfile, FT_BOOLEAN); | |
3330 | break; | |
3331 | ||
3332 | case FT_pointer: /* (void *) */ | |
3333 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); | |
3334 | typep = lookup_pointer_type (typep); | |
3335 | break; | |
c5aa993b | 3336 | |
c906108c SS |
3337 | case FT_char: |
3338 | typep = dwarf_fundamental_type (current_objfile, FT_CHAR); | |
3339 | break; | |
c5aa993b | 3340 | |
c906108c SS |
3341 | case FT_signed_char: |
3342 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_CHAR); | |
3343 | break; | |
3344 | ||
3345 | case FT_unsigned_char: | |
3346 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); | |
3347 | break; | |
c5aa993b | 3348 | |
c906108c SS |
3349 | case FT_short: |
3350 | typep = dwarf_fundamental_type (current_objfile, FT_SHORT); | |
3351 | break; | |
3352 | ||
3353 | case FT_signed_short: | |
3354 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_SHORT); | |
3355 | break; | |
c5aa993b | 3356 | |
c906108c SS |
3357 | case FT_unsigned_short: |
3358 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); | |
3359 | break; | |
c5aa993b | 3360 | |
c906108c SS |
3361 | case FT_integer: |
3362 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
3363 | break; | |
3364 | ||
3365 | case FT_signed_integer: | |
3366 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_INTEGER); | |
3367 | break; | |
c5aa993b | 3368 | |
c906108c SS |
3369 | case FT_unsigned_integer: |
3370 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); | |
3371 | break; | |
c5aa993b | 3372 | |
c906108c SS |
3373 | case FT_long: |
3374 | typep = dwarf_fundamental_type (current_objfile, FT_LONG); | |
3375 | break; | |
3376 | ||
3377 | case FT_signed_long: | |
3378 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG); | |
3379 | break; | |
c5aa993b | 3380 | |
c906108c SS |
3381 | case FT_unsigned_long: |
3382 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG); | |
3383 | break; | |
c5aa993b | 3384 | |
c906108c SS |
3385 | case FT_long_long: |
3386 | typep = dwarf_fundamental_type (current_objfile, FT_LONG_LONG); | |
3387 | break; | |
3388 | ||
3389 | case FT_signed_long_long: | |
3390 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG_LONG); | |
3391 | break; | |
3392 | ||
3393 | case FT_unsigned_long_long: | |
3394 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); | |
3395 | break; | |
3396 | ||
3397 | case FT_float: | |
3398 | typep = dwarf_fundamental_type (current_objfile, FT_FLOAT); | |
3399 | break; | |
c5aa993b | 3400 | |
c906108c SS |
3401 | case FT_dbl_prec_float: |
3402 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); | |
3403 | break; | |
c5aa993b | 3404 | |
c906108c SS |
3405 | case FT_ext_prec_float: |
3406 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); | |
3407 | break; | |
c5aa993b | 3408 | |
c906108c SS |
3409 | case FT_complex: |
3410 | typep = dwarf_fundamental_type (current_objfile, FT_COMPLEX); | |
3411 | break; | |
c5aa993b | 3412 | |
c906108c SS |
3413 | case FT_dbl_prec_complex: |
3414 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_COMPLEX); | |
3415 | break; | |
c5aa993b | 3416 | |
c906108c SS |
3417 | case FT_ext_prec_complex: |
3418 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_COMPLEX); | |
3419 | break; | |
c5aa993b | 3420 | |
c906108c SS |
3421 | } |
3422 | ||
3423 | if (typep == NULL) | |
3424 | { | |
3425 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
3426 | if (!(FT_lo_user <= fundtype && fundtype <= FT_hi_user)) | |
3427 | { | |
3428 | complain (&unexpected_fund_type, DIE_ID, DIE_NAME, fundtype); | |
3429 | } | |
3430 | } | |
c5aa993b | 3431 | |
c906108c SS |
3432 | return (typep); |
3433 | } | |
3434 | ||
3435 | /* | |
3436 | ||
c5aa993b | 3437 | LOCAL FUNCTION |
c906108c | 3438 | |
c5aa993b | 3439 | create_name -- allocate a fresh copy of a string on an obstack |
c906108c | 3440 | |
c5aa993b | 3441 | DESCRIPTION |
c906108c | 3442 | |
c5aa993b JM |
3443 | Given a pointer to a string and a pointer to an obstack, allocates |
3444 | a fresh copy of the string on the specified obstack. | |
c906108c | 3445 | |
c5aa993b | 3446 | */ |
c906108c SS |
3447 | |
3448 | static char * | |
3449 | create_name (name, obstackp) | |
3450 | char *name; | |
3451 | struct obstack *obstackp; | |
3452 | { | |
3453 | int length; | |
3454 | char *newname; | |
3455 | ||
3456 | length = strlen (name) + 1; | |
3457 | newname = (char *) obstack_alloc (obstackp, length); | |
3458 | strcpy (newname, name); | |
3459 | return (newname); | |
3460 | } | |
3461 | ||
3462 | /* | |
3463 | ||
c5aa993b | 3464 | LOCAL FUNCTION |
c906108c | 3465 | |
c5aa993b | 3466 | basicdieinfo -- extract the minimal die info from raw die data |
c906108c | 3467 | |
c5aa993b | 3468 | SYNOPSIS |
c906108c | 3469 | |
c5aa993b JM |
3470 | void basicdieinfo (char *diep, struct dieinfo *dip, |
3471 | struct objfile *objfile) | |
c906108c | 3472 | |
c5aa993b | 3473 | DESCRIPTION |
c906108c | 3474 | |
c5aa993b JM |
3475 | Given a pointer to raw DIE data, and a pointer to an instance of a |
3476 | die info structure, this function extracts the basic information | |
3477 | from the DIE data required to continue processing this DIE, along | |
3478 | with some bookkeeping information about the DIE. | |
c906108c | 3479 | |
c5aa993b JM |
3480 | The information we absolutely must have includes the DIE tag, |
3481 | and the DIE length. If we need the sibling reference, then we | |
3482 | will have to call completedieinfo() to process all the remaining | |
3483 | DIE information. | |
c906108c | 3484 | |
c5aa993b JM |
3485 | Note that since there is no guarantee that the data is properly |
3486 | aligned in memory for the type of access required (indirection | |
3487 | through anything other than a char pointer), and there is no | |
3488 | guarantee that it is in the same byte order as the gdb host, | |
3489 | we call a function which deals with both alignment and byte | |
3490 | swapping issues. Possibly inefficient, but quite portable. | |
c906108c | 3491 | |
c5aa993b JM |
3492 | We also take care of some other basic things at this point, such |
3493 | as ensuring that the instance of the die info structure starts | |
3494 | out completely zero'd and that curdie is initialized for use | |
3495 | in error reporting if we have a problem with the current die. | |
c906108c | 3496 | |
c5aa993b JM |
3497 | NOTES |
3498 | ||
3499 | All DIE's must have at least a valid length, thus the minimum | |
3500 | DIE size is SIZEOF_DIE_LENGTH. In order to have a valid tag, the | |
3501 | DIE size must be at least SIZEOF_DIE_TAG larger, otherwise they | |
3502 | are forced to be TAG_padding DIES. | |
c906108c | 3503 | |
c5aa993b JM |
3504 | Padding DIES must be at least SIZEOF_DIE_LENGTH in length, implying |
3505 | that if a padding DIE is used for alignment and the amount needed is | |
3506 | less than SIZEOF_DIE_LENGTH, then the padding DIE has to be big | |
3507 | enough to align to the next alignment boundry. | |
3508 | ||
3509 | We do some basic sanity checking here, such as verifying that the | |
3510 | length of the die would not cause it to overrun the recorded end of | |
3511 | the buffer holding the DIE info. If we find a DIE that is either | |
3512 | too small or too large, we force it's length to zero which should | |
3513 | cause the caller to take appropriate action. | |
c906108c SS |
3514 | */ |
3515 | ||
3516 | static void | |
3517 | basicdieinfo (dip, diep, objfile) | |
3518 | struct dieinfo *dip; | |
3519 | char *diep; | |
3520 | struct objfile *objfile; | |
3521 | { | |
3522 | curdie = dip; | |
3523 | memset (dip, 0, sizeof (struct dieinfo)); | |
c5aa993b JM |
3524 | dip->die = diep; |
3525 | dip->die_ref = dbroff + (diep - dbbase); | |
3526 | dip->die_length = target_to_host (diep, SIZEOF_DIE_LENGTH, GET_UNSIGNED, | |
3527 | objfile); | |
3528 | if ((dip->die_length < SIZEOF_DIE_LENGTH) || | |
3529 | ((diep + dip->die_length) > (dbbase + dbsize))) | |
c906108c | 3530 | { |
c5aa993b JM |
3531 | complain (&malformed_die, DIE_ID, DIE_NAME, dip->die_length); |
3532 | dip->die_length = 0; | |
c906108c | 3533 | } |
c5aa993b | 3534 | else if (dip->die_length < (SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG)) |
c906108c | 3535 | { |
c5aa993b | 3536 | dip->die_tag = TAG_padding; |
c906108c SS |
3537 | } |
3538 | else | |
3539 | { | |
3540 | diep += SIZEOF_DIE_LENGTH; | |
c5aa993b JM |
3541 | dip->die_tag = target_to_host (diep, SIZEOF_DIE_TAG, GET_UNSIGNED, |
3542 | objfile); | |
c906108c SS |
3543 | } |
3544 | } | |
3545 | ||
3546 | /* | |
3547 | ||
c5aa993b | 3548 | LOCAL FUNCTION |
c906108c | 3549 | |
c5aa993b | 3550 | completedieinfo -- finish reading the information for a given DIE |
c906108c | 3551 | |
c5aa993b | 3552 | SYNOPSIS |
c906108c | 3553 | |
c5aa993b | 3554 | void completedieinfo (struct dieinfo *dip, struct objfile *objfile) |
c906108c | 3555 | |
c5aa993b | 3556 | DESCRIPTION |
c906108c | 3557 | |
c5aa993b JM |
3558 | Given a pointer to an already partially initialized die info structure, |
3559 | scan the raw DIE data and finish filling in the die info structure | |
3560 | from the various attributes found. | |
c906108c | 3561 | |
c5aa993b JM |
3562 | Note that since there is no guarantee that the data is properly |
3563 | aligned in memory for the type of access required (indirection | |
3564 | through anything other than a char pointer), and there is no | |
3565 | guarantee that it is in the same byte order as the gdb host, | |
3566 | we call a function which deals with both alignment and byte | |
3567 | swapping issues. Possibly inefficient, but quite portable. | |
c906108c | 3568 | |
c5aa993b JM |
3569 | NOTES |
3570 | ||
3571 | Each time we are called, we increment the diecount variable, which | |
3572 | keeps an approximate count of the number of dies processed for | |
3573 | each compilation unit. This information is presented to the user | |
3574 | if the info_verbose flag is set. | |
c906108c SS |
3575 | |
3576 | */ | |
3577 | ||
3578 | static void | |
3579 | completedieinfo (dip, objfile) | |
3580 | struct dieinfo *dip; | |
3581 | struct objfile *objfile; | |
3582 | { | |
3583 | char *diep; /* Current pointer into raw DIE data */ | |
3584 | char *end; /* Terminate DIE scan here */ | |
3585 | unsigned short attr; /* Current attribute being scanned */ | |
3586 | unsigned short form; /* Form of the attribute */ | |
3587 | int nbytes; /* Size of next field to read */ | |
c5aa993b | 3588 | |
c906108c | 3589 | diecount++; |
c5aa993b JM |
3590 | diep = dip->die; |
3591 | end = diep + dip->die_length; | |
c906108c SS |
3592 | diep += SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG; |
3593 | while (diep < end) | |
3594 | { | |
3595 | attr = target_to_host (diep, SIZEOF_ATTRIBUTE, GET_UNSIGNED, objfile); | |
3596 | diep += SIZEOF_ATTRIBUTE; | |
3597 | if ((nbytes = attribute_size (attr)) == -1) | |
3598 | { | |
3599 | complain (&unknown_attribute_length, DIE_ID, DIE_NAME); | |
3600 | diep = end; | |
3601 | continue; | |
3602 | } | |
3603 | switch (attr) | |
3604 | { | |
3605 | case AT_fund_type: | |
c5aa993b JM |
3606 | dip->at_fund_type = target_to_host (diep, nbytes, GET_UNSIGNED, |
3607 | objfile); | |
c906108c SS |
3608 | break; |
3609 | case AT_ordering: | |
c5aa993b JM |
3610 | dip->at_ordering = target_to_host (diep, nbytes, GET_UNSIGNED, |
3611 | objfile); | |
c906108c SS |
3612 | break; |
3613 | case AT_bit_offset: | |
c5aa993b JM |
3614 | dip->at_bit_offset = target_to_host (diep, nbytes, GET_UNSIGNED, |
3615 | objfile); | |
c906108c SS |
3616 | break; |
3617 | case AT_sibling: | |
c5aa993b JM |
3618 | dip->at_sibling = target_to_host (diep, nbytes, GET_UNSIGNED, |
3619 | objfile); | |
c906108c SS |
3620 | break; |
3621 | case AT_stmt_list: | |
c5aa993b JM |
3622 | dip->at_stmt_list = target_to_host (diep, nbytes, GET_UNSIGNED, |
3623 | objfile); | |
3624 | dip->has_at_stmt_list = 1; | |
c906108c SS |
3625 | break; |
3626 | case AT_low_pc: | |
c5aa993b JM |
3627 | dip->at_low_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3628 | objfile); | |
3629 | dip->at_low_pc += baseaddr; | |
3630 | dip->has_at_low_pc = 1; | |
c906108c SS |
3631 | break; |
3632 | case AT_high_pc: | |
c5aa993b JM |
3633 | dip->at_high_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3634 | objfile); | |
3635 | dip->at_high_pc += baseaddr; | |
c906108c SS |
3636 | break; |
3637 | case AT_language: | |
c5aa993b JM |
3638 | dip->at_language = target_to_host (diep, nbytes, GET_UNSIGNED, |
3639 | objfile); | |
c906108c SS |
3640 | break; |
3641 | case AT_user_def_type: | |
c5aa993b JM |
3642 | dip->at_user_def_type = target_to_host (diep, nbytes, |
3643 | GET_UNSIGNED, objfile); | |
c906108c SS |
3644 | break; |
3645 | case AT_byte_size: | |
c5aa993b JM |
3646 | dip->at_byte_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3647 | objfile); | |
3648 | dip->has_at_byte_size = 1; | |
c906108c SS |
3649 | break; |
3650 | case AT_bit_size: | |
c5aa993b JM |
3651 | dip->at_bit_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3652 | objfile); | |
c906108c SS |
3653 | break; |
3654 | case AT_member: | |
c5aa993b JM |
3655 | dip->at_member = target_to_host (diep, nbytes, GET_UNSIGNED, |
3656 | objfile); | |
c906108c SS |
3657 | break; |
3658 | case AT_discr: | |
c5aa993b JM |
3659 | dip->at_discr = target_to_host (diep, nbytes, GET_UNSIGNED, |
3660 | objfile); | |
c906108c SS |
3661 | break; |
3662 | case AT_location: | |
c5aa993b | 3663 | dip->at_location = diep; |
c906108c SS |
3664 | break; |
3665 | case AT_mod_fund_type: | |
c5aa993b | 3666 | dip->at_mod_fund_type = diep; |
c906108c SS |
3667 | break; |
3668 | case AT_subscr_data: | |
c5aa993b | 3669 | dip->at_subscr_data = diep; |
c906108c SS |
3670 | break; |
3671 | case AT_mod_u_d_type: | |
c5aa993b | 3672 | dip->at_mod_u_d_type = diep; |
c906108c SS |
3673 | break; |
3674 | case AT_element_list: | |
c5aa993b JM |
3675 | dip->at_element_list = diep; |
3676 | dip->short_element_list = 0; | |
c906108c SS |
3677 | break; |
3678 | case AT_short_element_list: | |
c5aa993b JM |
3679 | dip->at_element_list = diep; |
3680 | dip->short_element_list = 1; | |
c906108c SS |
3681 | break; |
3682 | case AT_discr_value: | |
c5aa993b | 3683 | dip->at_discr_value = diep; |
c906108c SS |
3684 | break; |
3685 | case AT_string_length: | |
c5aa993b | 3686 | dip->at_string_length = diep; |
c906108c SS |
3687 | break; |
3688 | case AT_name: | |
c5aa993b | 3689 | dip->at_name = diep; |
c906108c SS |
3690 | break; |
3691 | case AT_comp_dir: | |
3692 | /* For now, ignore any "hostname:" portion, since gdb doesn't | |
3693 | know how to deal with it. (FIXME). */ | |
c5aa993b JM |
3694 | dip->at_comp_dir = strrchr (diep, ':'); |
3695 | if (dip->at_comp_dir != NULL) | |
c906108c | 3696 | { |
c5aa993b | 3697 | dip->at_comp_dir++; |
c906108c SS |
3698 | } |
3699 | else | |
3700 | { | |
c5aa993b | 3701 | dip->at_comp_dir = diep; |
c906108c SS |
3702 | } |
3703 | break; | |
3704 | case AT_producer: | |
c5aa993b | 3705 | dip->at_producer = diep; |
c906108c SS |
3706 | break; |
3707 | case AT_start_scope: | |
c5aa993b JM |
3708 | dip->at_start_scope = target_to_host (diep, nbytes, GET_UNSIGNED, |
3709 | objfile); | |
c906108c SS |
3710 | break; |
3711 | case AT_stride_size: | |
c5aa993b JM |
3712 | dip->at_stride_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3713 | objfile); | |
c906108c SS |
3714 | break; |
3715 | case AT_src_info: | |
c5aa993b JM |
3716 | dip->at_src_info = target_to_host (diep, nbytes, GET_UNSIGNED, |
3717 | objfile); | |
c906108c SS |
3718 | break; |
3719 | case AT_prototyped: | |
c5aa993b | 3720 | dip->at_prototyped = diep; |
c906108c SS |
3721 | break; |
3722 | default: | |
3723 | /* Found an attribute that we are unprepared to handle. However | |
3724 | it is specifically one of the design goals of DWARF that | |
3725 | consumers should ignore unknown attributes. As long as the | |
3726 | form is one that we recognize (so we know how to skip it), | |
3727 | we can just ignore the unknown attribute. */ | |
3728 | break; | |
3729 | } | |
3730 | form = FORM_FROM_ATTR (attr); | |
3731 | switch (form) | |
3732 | { | |
3733 | case FORM_DATA2: | |
3734 | diep += 2; | |
3735 | break; | |
3736 | case FORM_DATA4: | |
3737 | case FORM_REF: | |
3738 | diep += 4; | |
3739 | break; | |
3740 | case FORM_DATA8: | |
3741 | diep += 8; | |
3742 | break; | |
3743 | case FORM_ADDR: | |
3744 | diep += TARGET_FT_POINTER_SIZE (objfile); | |
3745 | break; | |
3746 | case FORM_BLOCK2: | |
3747 | diep += 2 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); | |
3748 | break; | |
3749 | case FORM_BLOCK4: | |
3750 | diep += 4 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); | |
3751 | break; | |
3752 | case FORM_STRING: | |
3753 | diep += strlen (diep) + 1; | |
3754 | break; | |
3755 | default: | |
3756 | complain (&unknown_attribute_form, DIE_ID, DIE_NAME, form); | |
3757 | diep = end; | |
3758 | break; | |
3759 | } | |
3760 | } | |
3761 | } | |
3762 | ||
3763 | /* | |
3764 | ||
c5aa993b | 3765 | LOCAL FUNCTION |
c906108c | 3766 | |
c5aa993b | 3767 | target_to_host -- swap in target data to host |
c906108c | 3768 | |
c5aa993b | 3769 | SYNOPSIS |
c906108c | 3770 | |
c5aa993b JM |
3771 | target_to_host (char *from, int nbytes, int signextend, |
3772 | struct objfile *objfile) | |
c906108c | 3773 | |
c5aa993b | 3774 | DESCRIPTION |
c906108c | 3775 | |
c5aa993b JM |
3776 | Given pointer to data in target format in FROM, a byte count for |
3777 | the size of the data in NBYTES, a flag indicating whether or not | |
3778 | the data is signed in SIGNEXTEND, and a pointer to the current | |
3779 | objfile in OBJFILE, convert the data to host format and return | |
3780 | the converted value. | |
c906108c | 3781 | |
c5aa993b | 3782 | NOTES |
c906108c | 3783 | |
c5aa993b JM |
3784 | FIXME: If we read data that is known to be signed, and expect to |
3785 | use it as signed data, then we need to explicitly sign extend the | |
3786 | result until the bfd library is able to do this for us. | |
c906108c | 3787 | |
c5aa993b | 3788 | FIXME: Would a 32 bit target ever need an 8 byte result? |
c906108c SS |
3789 | |
3790 | */ | |
3791 | ||
3792 | static CORE_ADDR | |
3793 | target_to_host (from, nbytes, signextend, objfile) | |
3794 | char *from; | |
3795 | int nbytes; | |
3796 | int signextend; /* FIXME: Unused */ | |
3797 | struct objfile *objfile; | |
3798 | { | |
3799 | CORE_ADDR rtnval; | |
3800 | ||
3801 | switch (nbytes) | |
3802 | { | |
c5aa993b JM |
3803 | case 8: |
3804 | rtnval = bfd_get_64 (objfile->obfd, (bfd_byte *) from); | |
3805 | break; | |
3806 | case 4: | |
3807 | rtnval = bfd_get_32 (objfile->obfd, (bfd_byte *) from); | |
3808 | break; | |
3809 | case 2: | |
3810 | rtnval = bfd_get_16 (objfile->obfd, (bfd_byte *) from); | |
3811 | break; | |
3812 | case 1: | |
3813 | rtnval = bfd_get_8 (objfile->obfd, (bfd_byte *) from); | |
3814 | break; | |
3815 | default: | |
3816 | complain (&no_bfd_get_N, DIE_ID, DIE_NAME, nbytes); | |
3817 | rtnval = 0; | |
3818 | break; | |
c906108c SS |
3819 | } |
3820 | return (rtnval); | |
3821 | } | |
3822 | ||
3823 | /* | |
3824 | ||
c5aa993b | 3825 | LOCAL FUNCTION |
c906108c | 3826 | |
c5aa993b | 3827 | attribute_size -- compute size of data for a DWARF attribute |
c906108c | 3828 | |
c5aa993b | 3829 | SYNOPSIS |
c906108c | 3830 | |
c5aa993b | 3831 | static int attribute_size (unsigned int attr) |
c906108c | 3832 | |
c5aa993b | 3833 | DESCRIPTION |
c906108c | 3834 | |
c5aa993b JM |
3835 | Given a DWARF attribute in ATTR, compute the size of the first |
3836 | piece of data associated with this attribute and return that | |
3837 | size. | |
c906108c | 3838 | |
c5aa993b | 3839 | Returns -1 for unrecognized attributes. |
c906108c SS |
3840 | |
3841 | */ | |
3842 | ||
3843 | static int | |
3844 | attribute_size (attr) | |
3845 | unsigned int attr; | |
3846 | { | |
3847 | int nbytes; /* Size of next data for this attribute */ | |
3848 | unsigned short form; /* Form of the attribute */ | |
3849 | ||
3850 | form = FORM_FROM_ATTR (attr); | |
3851 | switch (form) | |
3852 | { | |
c5aa993b JM |
3853 | case FORM_STRING: /* A variable length field is next */ |
3854 | nbytes = 0; | |
3855 | break; | |
3856 | case FORM_DATA2: /* Next 2 byte field is the data itself */ | |
3857 | case FORM_BLOCK2: /* Next 2 byte field is a block length */ | |
3858 | nbytes = 2; | |
3859 | break; | |
3860 | case FORM_DATA4: /* Next 4 byte field is the data itself */ | |
3861 | case FORM_BLOCK4: /* Next 4 byte field is a block length */ | |
3862 | case FORM_REF: /* Next 4 byte field is a DIE offset */ | |
3863 | nbytes = 4; | |
3864 | break; | |
3865 | case FORM_DATA8: /* Next 8 byte field is the data itself */ | |
3866 | nbytes = 8; | |
3867 | break; | |
3868 | case FORM_ADDR: /* Next field size is target sizeof(void *) */ | |
3869 | nbytes = TARGET_FT_POINTER_SIZE (objfile); | |
3870 | break; | |
3871 | default: | |
3872 | complain (&unknown_attribute_form, DIE_ID, DIE_NAME, form); | |
3873 | nbytes = -1; | |
3874 | break; | |
3875 | } | |
c906108c SS |
3876 | return (nbytes); |
3877 | } |