Commit | Line | Data |
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35f5886e | 1 | /* DWARF debugging format support for GDB. |
1ab3bf1b JG |
2 | Copyright (C) 1991, 1992 Free Software Foundation, Inc. |
3 | Written by Fred Fish at Cygnus Support. Portions based on dbxread.c, | |
35f5886e FF |
4 | mipsread.c, coffread.c, and dwarfread.c from a Data General SVR4 gdb port. |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
21 | ||
22 | /* | |
23 | ||
9745ba07 JK |
24 | FIXME: Do we need to generate dependencies in partial symtabs? |
25 | (Perhaps we don't need to). | |
35f5886e | 26 | |
35f5886e FF |
27 | FIXME: Resolve minor differences between what information we put in the |
28 | partial symbol table and what dbxread puts in. For example, we don't yet | |
29 | put enum constants there. And dbxread seems to invent a lot of typedefs | |
30 | we never see. Use the new printpsym command to see the partial symbol table | |
31 | contents. | |
32 | ||
35f5886e FF |
33 | FIXME: Figure out a better way to tell gdb about the name of the function |
34 | contain the user's entry point (I.E. main()) | |
35 | ||
35f5886e FF |
36 | FIXME: See other FIXME's and "ifdef 0" scattered throughout the code for |
37 | other things to work on, if you get bored. :-) | |
38 | ||
39 | */ | |
4d315a07 | 40 | |
d747e0af | 41 | #include "defs.h" |
35f5886e FF |
42 | #include "bfd.h" |
43 | #include "symtab.h" | |
1ab3bf1b | 44 | #include "gdbtypes.h" |
35f5886e | 45 | #include "symfile.h" |
5e2e79f8 | 46 | #include "objfiles.h" |
13b5a7ff | 47 | #include "libbfd.h" /* FIXME Secret Internal BFD stuff (bfd_read) */ |
f5f0679a | 48 | #include "elf/dwarf.h" |
4d315a07 | 49 | #include "buildsym.h" |
2dbde378 | 50 | #include "demangle.h" |
bf229b4e FF |
51 | #include "expression.h" /* Needed for enum exp_opcode in language.h, sigh... */ |
52 | #include "language.h" | |
51b80b00 | 53 | #include "complaints.h" |
35f5886e | 54 | |
d5931d79 JG |
55 | #include <fcntl.h> |
56 | #include <string.h> | |
603900c7 | 57 | #include <sys/types.h> |
51b80b00 | 58 | |
d5931d79 JG |
59 | #ifndef NO_SYS_FILE |
60 | #include <sys/file.h> | |
61 | #endif | |
62 | ||
63 | /* FIXME -- convert this to SEEK_SET a la POSIX, move to config files. */ | |
64 | #ifndef L_SET | |
65 | #define L_SET 0 | |
66 | #endif | |
67 | ||
51b80b00 FF |
68 | /* Some macros to provide DIE info for complaints. */ |
69 | ||
70 | #define DIE_ID (curdie!=NULL ? curdie->die_ref : 0) | |
71 | #define DIE_NAME (curdie!=NULL && curdie->at_name!=NULL) ? curdie->at_name : "" | |
72 | ||
73 | /* Complaints that can be issued during DWARF debug info reading. */ | |
74 | ||
75 | struct complaint no_bfd_get_N = | |
76 | { | |
77 | "DIE @ 0x%x \"%s\", no bfd support for %d byte data object", 0, 0 | |
78 | }; | |
79 | ||
80 | struct complaint malformed_die = | |
81 | { | |
82 | "DIE @ 0x%x \"%s\", malformed DIE, bad length (%d bytes)", 0, 0 | |
83 | }; | |
84 | ||
85 | struct complaint bad_die_ref = | |
86 | { | |
87 | "DIE @ 0x%x \"%s\", reference to DIE (0x%x) outside compilation unit", 0, 0 | |
88 | }; | |
89 | ||
90 | struct complaint unknown_attribute_form = | |
91 | { | |
92 | "DIE @ 0x%x \"%s\", unknown attribute form (0x%x)", 0, 0 | |
93 | }; | |
94 | ||
95 | struct complaint unknown_attribute_length = | |
96 | { | |
97 | "DIE @ 0x%x \"%s\", unknown attribute length, skipped remaining attributes", 0, 0 | |
98 | }; | |
99 | ||
100 | struct complaint unexpected_fund_type = | |
101 | { | |
102 | "DIE @ 0x%x \"%s\", unexpected fundamental type 0x%x", 0, 0 | |
103 | }; | |
104 | ||
105 | struct complaint unknown_type_modifier = | |
106 | { | |
107 | "DIE @ 0x%x \"%s\", unknown type modifier %u", 0, 0 | |
108 | }; | |
109 | ||
110 | struct complaint volatile_ignored = | |
111 | { | |
112 | "DIE @ 0x%x \"%s\", type modifier 'volatile' ignored", 0, 0 | |
113 | }; | |
114 | ||
115 | struct complaint const_ignored = | |
116 | { | |
117 | "DIE @ 0x%x \"%s\", type modifier 'const' ignored", 0, 0 | |
118 | }; | |
119 | ||
120 | struct complaint botched_modified_type = | |
121 | { | |
122 | "DIE @ 0x%x \"%s\", botched modified type decoding (mtype 0x%x)", 0, 0 | |
123 | }; | |
124 | ||
125 | struct complaint op_deref2 = | |
126 | { | |
127 | "DIE @ 0x%x \"%s\", OP_DEREF2 address 0x%x not handled", 0, 0 | |
128 | }; | |
129 | ||
130 | struct complaint op_deref4 = | |
131 | { | |
132 | "DIE @ 0x%x \"%s\", OP_DEREF4 address 0x%x not handled", 0, 0 | |
133 | }; | |
134 | ||
135 | struct complaint basereg_not_handled = | |
136 | { | |
137 | "DIE @ 0x%x \"%s\", BASEREG %d not handled", 0, 0 | |
138 | }; | |
139 | ||
140 | struct complaint dup_user_type_allocation = | |
141 | { | |
142 | "DIE @ 0x%x \"%s\", internal error: duplicate user type allocation", 0, 0 | |
143 | }; | |
144 | ||
145 | struct complaint dup_user_type_definition = | |
146 | { | |
147 | "DIE @ 0x%x \"%s\", internal error: duplicate user type definition", 0, 0 | |
148 | }; | |
149 | ||
150 | struct complaint missing_tag = | |
151 | { | |
152 | "DIE @ 0x%x \"%s\", missing class, structure, or union tag", 0, 0 | |
153 | }; | |
154 | ||
155 | struct complaint bad_array_element_type = | |
156 | { | |
157 | "DIE @ 0x%x \"%s\", bad array element type attribute 0x%x", 0, 0 | |
158 | }; | |
159 | ||
160 | struct complaint subscript_data_items = | |
161 | { | |
162 | "DIE @ 0x%x \"%s\", can't decode subscript data items", 0, 0 | |
163 | }; | |
164 | ||
165 | struct complaint unhandled_array_subscript_format = | |
166 | { | |
167 | "DIE @ 0x%x \"%s\", array subscript format 0x%x not handled yet", 0, 0 | |
168 | }; | |
169 | ||
170 | struct complaint unknown_array_subscript_format = | |
171 | { | |
172 | "DIE @ 0x%x \"%s\", unknown array subscript format %x", 0, 0 | |
173 | }; | |
174 | ||
175 | struct complaint not_row_major = | |
176 | { | |
177 | "DIE @ 0x%x \"%s\", array not row major; not handled correctly", 0, 0 | |
178 | }; | |
35f5886e | 179 | |
13b5a7ff | 180 | typedef unsigned int DIE_REF; /* Reference to a DIE */ |
35f5886e | 181 | |
4d315a07 FF |
182 | #ifndef GCC_PRODUCER |
183 | #define GCC_PRODUCER "GNU C " | |
184 | #endif | |
35f5886e | 185 | |
2dbde378 FF |
186 | #ifndef GPLUS_PRODUCER |
187 | #define GPLUS_PRODUCER "GNU C++ " | |
188 | #endif | |
189 | ||
190 | #ifndef LCC_PRODUCER | |
3dc755fb | 191 | #define LCC_PRODUCER "NCR C/C++" |
2dbde378 FF |
192 | #endif |
193 | ||
93bb6e65 FF |
194 | #ifndef CHILL_PRODUCER |
195 | #define CHILL_PRODUCER "GNU Chill " | |
196 | #endif | |
93bb6e65 | 197 | |
13b5a7ff FF |
198 | /* Flags to target_to_host() that tell whether or not the data object is |
199 | expected to be signed. Used, for example, when fetching a signed | |
200 | integer in the target environment which is used as a signed integer | |
201 | in the host environment, and the two environments have different sized | |
202 | ints. In this case, *somebody* has to sign extend the smaller sized | |
203 | int. */ | |
204 | ||
205 | #define GET_UNSIGNED 0 /* No sign extension required */ | |
206 | #define GET_SIGNED 1 /* Sign extension required */ | |
207 | ||
208 | /* Defines for things which are specified in the document "DWARF Debugging | |
209 | Information Format" published by UNIX International, Programming Languages | |
210 | SIG. These defines are based on revision 1.0.0, Jan 20, 1992. */ | |
211 | ||
212 | #define SIZEOF_DIE_LENGTH 4 | |
213 | #define SIZEOF_DIE_TAG 2 | |
214 | #define SIZEOF_ATTRIBUTE 2 | |
215 | #define SIZEOF_FORMAT_SPECIFIER 1 | |
216 | #define SIZEOF_FMT_FT 2 | |
217 | #define SIZEOF_LINETBL_LENGTH 4 | |
218 | #define SIZEOF_LINETBL_LINENO 4 | |
219 | #define SIZEOF_LINETBL_STMT 2 | |
220 | #define SIZEOF_LINETBL_DELTA 4 | |
221 | #define SIZEOF_LOC_ATOM_CODE 1 | |
222 | ||
223 | #define FORM_FROM_ATTR(attr) ((attr) & 0xF) /* Implicitly specified */ | |
224 | ||
225 | /* Macros that return the sizes of various types of data in the target | |
226 | environment. | |
227 | ||
2d6d969c FF |
228 | FIXME: Currently these are just compile time constants (as they are in |
229 | other parts of gdb as well). They need to be able to get the right size | |
230 | either from the bfd or possibly from the DWARF info. It would be nice if | |
231 | the DWARF producer inserted DIES that describe the fundamental types in | |
232 | the target environment into the DWARF info, similar to the way dbx stabs | |
233 | producers produce information about their fundamental types. */ | |
234 | ||
235 | #define TARGET_FT_POINTER_SIZE(objfile) (TARGET_PTR_BIT / TARGET_CHAR_BIT) | |
236 | #define TARGET_FT_LONG_SIZE(objfile) (TARGET_LONG_BIT / TARGET_CHAR_BIT) | |
95967e73 | 237 | |
768be6e1 FF |
238 | /* The Amiga SVR4 header file <dwarf.h> defines AT_element_list as a |
239 | FORM_BLOCK2, and this is the value emitted by the AT&T compiler. | |
240 | However, the Issue 2 DWARF specification from AT&T defines it as | |
241 | a FORM_BLOCK4, as does the latest specification from UI/PLSIG. | |
242 | For backwards compatibility with the AT&T compiler produced executables | |
243 | we define AT_short_element_list for this variant. */ | |
244 | ||
245 | #define AT_short_element_list (0x00f0|FORM_BLOCK2) | |
246 | ||
247 | /* External variables referenced. */ | |
248 | ||
35f5886e | 249 | extern int info_verbose; /* From main.c; nonzero => verbose */ |
318bf84f | 250 | extern char *warning_pre_print; /* From utils.c */ |
35f5886e FF |
251 | |
252 | /* The DWARF debugging information consists of two major pieces, | |
253 | one is a block of DWARF Information Entries (DIE's) and the other | |
254 | is a line number table. The "struct dieinfo" structure contains | |
255 | the information for a single DIE, the one currently being processed. | |
256 | ||
257 | In order to make it easier to randomly access the attribute fields | |
13b5a7ff | 258 | of the current DIE, which are specifically unordered within the DIE, |
35f5886e FF |
259 | each DIE is scanned and an instance of the "struct dieinfo" |
260 | structure is initialized. | |
261 | ||
262 | Initialization is done in two levels. The first, done by basicdieinfo(), | |
263 | just initializes those fields that are vital to deciding whether or not | |
264 | to use this DIE, how to skip past it, etc. The second, done by the | |
265 | function completedieinfo(), fills in the rest of the information. | |
266 | ||
267 | Attributes which have block forms are not interpreted at the time | |
268 | the DIE is scanned, instead we just save pointers to the start | |
269 | of their value fields. | |
270 | ||
271 | Some fields have a flag <name>_p that is set when the value of the | |
272 | field is valid (I.E. we found a matching attribute in the DIE). Since | |
273 | we may want to test for the presence of some attributes in the DIE, | |
2d6186f4 | 274 | such as AT_low_pc, without restricting the values of the field, |
35f5886e FF |
275 | we need someway to note that we found such an attribute. |
276 | ||
277 | */ | |
278 | ||
279 | typedef char BLOCK; | |
280 | ||
281 | struct dieinfo { | |
13b5a7ff FF |
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 | unsigned long at_low_pc; | |
302 | unsigned long at_high_pc; | |
303 | unsigned long at_language; | |
304 | unsigned long at_member; | |
305 | unsigned long at_discr; | |
306 | BLOCK * at_discr_value; | |
13b5a7ff FF |
307 | BLOCK * at_string_length; |
308 | char * at_comp_dir; | |
309 | char * at_producer; | |
13b5a7ff FF |
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; | |
50055e94 | 316 | unsigned int has_at_byte_size:1; |
13b5a7ff | 317 | unsigned int short_element_list:1; |
35f5886e FF |
318 | }; |
319 | ||
320 | static int diecount; /* Approximate count of dies for compilation unit */ | |
321 | static struct dieinfo *curdie; /* For warnings and such */ | |
322 | ||
323 | static char *dbbase; /* Base pointer to dwarf info */ | |
4090fe1c | 324 | static int dbsize; /* Size of dwarf info in bytes */ |
35f5886e FF |
325 | static int dbroff; /* Relative offset from start of .debug section */ |
326 | static char *lnbase; /* Base pointer to line section */ | |
327 | static int isreg; /* Kludge to identify register variables */ | |
a1c8d76e JK |
328 | /* Kludge to identify basereg references. Nonzero if we have an offset |
329 | relative to a basereg. */ | |
330 | static int offreg; | |
331 | /* Which base register is it relative to? */ | |
332 | static int basereg; | |
35f5886e | 333 | |
2670f34d | 334 | /* This value is added to each symbol value. FIXME: Generalize to |
3c02636b JK |
335 | the section_offsets structure used by dbxread (once this is done, |
336 | pass the appropriate section number to end_symtab). */ | |
35f5886e FF |
337 | static CORE_ADDR baseaddr; /* Add to each symbol value */ |
338 | ||
2670f34d JG |
339 | /* The section offsets used in the current psymtab or symtab. FIXME, |
340 | only used to pass one value (baseaddr) at the moment. */ | |
341 | static struct section_offsets *base_section_offsets; | |
342 | ||
35f5886e FF |
343 | /* Each partial symbol table entry contains a pointer to private data for the |
344 | read_symtab() function to use when expanding a partial symbol table entry | |
345 | to a full symbol table entry. For DWARF debugging info, this data is | |
346 | contained in the following structure and macros are provided for easy | |
347 | access to the members given a pointer to a partial symbol table entry. | |
348 | ||
349 | dbfoff Always the absolute file offset to the start of the ".debug" | |
350 | section for the file containing the DIE's being accessed. | |
351 | ||
352 | dbroff Relative offset from the start of the ".debug" access to the | |
353 | first DIE to be accessed. When building the partial symbol | |
354 | table, this value will be zero since we are accessing the | |
355 | entire ".debug" section. When expanding a partial symbol | |
356 | table entry, this value will be the offset to the first | |
357 | DIE for the compilation unit containing the symbol that | |
358 | triggers the expansion. | |
359 | ||
360 | dblength The size of the chunk of DIE's being examined, in bytes. | |
361 | ||
362 | lnfoff The absolute file offset to the line table fragment. Ignored | |
363 | when building partial symbol tables, but used when expanding | |
364 | them, and contains the absolute file offset to the fragment | |
365 | of the ".line" section containing the line numbers for the | |
366 | current compilation unit. | |
367 | */ | |
368 | ||
369 | struct dwfinfo { | |
d5931d79 | 370 | file_ptr dbfoff; /* Absolute file offset to start of .debug section */ |
35f5886e FF |
371 | int dbroff; /* Relative offset from start of .debug section */ |
372 | int dblength; /* Size of the chunk of DIE's being examined */ | |
d5931d79 | 373 | file_ptr lnfoff; /* Absolute file offset to line table fragment */ |
35f5886e FF |
374 | }; |
375 | ||
376 | #define DBFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbfoff) | |
377 | #define DBROFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbroff) | |
378 | #define DBLENGTH(p) (((struct dwfinfo *)((p)->read_symtab_private))->dblength) | |
379 | #define LNFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->lnfoff) | |
380 | ||
4d315a07 FF |
381 | /* The generic symbol table building routines have separate lists for |
382 | file scope symbols and all all other scopes (local scopes). So | |
383 | we need to select the right one to pass to add_symbol_to_list(). | |
384 | We do it by keeping a pointer to the correct list in list_in_scope. | |
35f5886e | 385 | |
4d315a07 FF |
386 | FIXME: The original dwarf code just treated the file scope as the first |
387 | local scope, and all other local scopes as nested local scopes, and worked | |
388 | fine. Check to see if we really need to distinguish these in buildsym.c */ | |
35f5886e | 389 | |
99140c31 | 390 | struct pending **list_in_scope = &file_symbols; |
35f5886e FF |
391 | |
392 | /* DIES which have user defined types or modified user defined types refer to | |
393 | other DIES for the type information. Thus we need to associate the offset | |
394 | of a DIE for a user defined type with a pointer to the type information. | |
395 | ||
396 | Originally this was done using a simple but expensive algorithm, with an | |
397 | array of unsorted structures, each containing an offset/type-pointer pair. | |
398 | This array was scanned linearly each time a lookup was done. The result | |
399 | was that gdb was spending over half it's startup time munging through this | |
400 | array of pointers looking for a structure that had the right offset member. | |
401 | ||
402 | The second attempt used the same array of structures, but the array was | |
403 | sorted using qsort each time a new offset/type was recorded, and a binary | |
404 | search was used to find the type pointer for a given DIE offset. This was | |
405 | even slower, due to the overhead of sorting the array each time a new | |
406 | offset/type pair was entered. | |
407 | ||
408 | The third attempt uses a fixed size array of type pointers, indexed by a | |
409 | value derived from the DIE offset. Since the minimum DIE size is 4 bytes, | |
410 | we can divide any DIE offset by 4 to obtain a unique index into this fixed | |
411 | size array. Since each element is a 4 byte pointer, it takes exactly as | |
412 | much memory to hold this array as to hold the DWARF info for a given | |
bf229b4e FF |
413 | compilation unit. But it gets freed as soon as we are done with it. |
414 | This has worked well in practice, as a reasonable tradeoff between memory | |
415 | consumption and speed, without having to resort to much more complicated | |
416 | algorithms. */ | |
35f5886e FF |
417 | |
418 | static struct type **utypes; /* Pointer to array of user type pointers */ | |
419 | static int numutypes; /* Max number of user type pointers */ | |
420 | ||
bf229b4e FF |
421 | /* Maintain an array of referenced fundamental types for the current |
422 | compilation unit being read. For DWARF version 1, we have to construct | |
423 | the fundamental types on the fly, since no information about the | |
424 | fundamental types is supplied. Each such fundamental type is created by | |
425 | calling a language dependent routine to create the type, and then a | |
426 | pointer to that type is then placed in the array at the index specified | |
427 | by it's FT_<TYPENAME> value. The array has a fixed size set by the | |
428 | FT_NUM_MEMBERS compile time constant, which is the number of predefined | |
429 | fundamental types gdb knows how to construct. */ | |
430 | ||
431 | static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */ | |
432 | ||
95ff889e FF |
433 | /* Record the language for the compilation unit which is currently being |
434 | processed. We know it once we have seen the TAG_compile_unit DIE, | |
435 | and we need it while processing the DIE's for that compilation unit. | |
436 | It is eventually saved in the symtab structure, but we don't finalize | |
437 | the symtab struct until we have processed all the DIE's for the | |
bf229b4e FF |
438 | compilation unit. We also need to get and save a pointer to the |
439 | language struct for this language, so we can call the language | |
440 | dependent routines for doing things such as creating fundamental | |
441 | types. */ | |
95ff889e FF |
442 | |
443 | static enum language cu_language; | |
bf229b4e | 444 | static const struct language_defn *cu_language_defn; |
95ff889e | 445 | |
35f5886e | 446 | /* Forward declarations of static functions so we don't have to worry |
1ab3bf1b JG |
447 | about ordering within this file. */ |
448 | ||
13b5a7ff FF |
449 | static int |
450 | attribute_size PARAMS ((unsigned int)); | |
451 | ||
452 | static unsigned long | |
453 | target_to_host PARAMS ((char *, int, int, struct objfile *)); | |
95967e73 | 454 | |
1ab3bf1b JG |
455 | static void |
456 | add_enum_psymbol PARAMS ((struct dieinfo *, struct objfile *)); | |
457 | ||
2dbde378 FF |
458 | static void |
459 | handle_producer PARAMS ((char *)); | |
460 | ||
1ab3bf1b JG |
461 | static void |
462 | read_file_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); | |
35f5886e | 463 | |
58050209 | 464 | static void |
1ab3bf1b | 465 | read_func_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
466 | |
467 | static void | |
1ab3bf1b JG |
468 | read_lexical_block_scope PARAMS ((struct dieinfo *, char *, char *, |
469 | struct objfile *)); | |
35f5886e | 470 | |
35f5886e | 471 | static void |
1ab3bf1b | 472 | scan_partial_symbols PARAMS ((char *, char *, struct objfile *)); |
35f5886e | 473 | |
35f5886e | 474 | static void |
d5931d79 JG |
475 | scan_compilation_units PARAMS ((char *, char *, file_ptr, |
476 | file_ptr, struct objfile *)); | |
35f5886e FF |
477 | |
478 | static void | |
1ab3bf1b | 479 | add_partial_symbol PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e FF |
480 | |
481 | static void | |
1ab3bf1b | 482 | init_psymbol_list PARAMS ((struct objfile *, int)); |
35f5886e FF |
483 | |
484 | static void | |
95967e73 | 485 | basicdieinfo PARAMS ((struct dieinfo *, char *, struct objfile *)); |
35f5886e FF |
486 | |
487 | static void | |
95967e73 | 488 | completedieinfo PARAMS ((struct dieinfo *, struct objfile *)); |
1ab3bf1b JG |
489 | |
490 | static void | |
491 | dwarf_psymtab_to_symtab PARAMS ((struct partial_symtab *)); | |
492 | ||
493 | static void | |
494 | psymtab_to_symtab_1 PARAMS ((struct partial_symtab *)); | |
35f5886e | 495 | |
c701c14c | 496 | static void |
1ab3bf1b | 497 | read_ofile_symtab PARAMS ((struct partial_symtab *)); |
35f5886e FF |
498 | |
499 | static void | |
1ab3bf1b | 500 | process_dies PARAMS ((char *, char *, struct objfile *)); |
35f5886e FF |
501 | |
502 | static void | |
1ab3bf1b JG |
503 | read_structure_scope PARAMS ((struct dieinfo *, char *, char *, |
504 | struct objfile *)); | |
35f5886e FF |
505 | |
506 | static struct type * | |
84ffdec2 | 507 | decode_array_element_type PARAMS ((char *)); |
35f5886e FF |
508 | |
509 | static struct type * | |
85f0a848 | 510 | decode_subscript_data_item PARAMS ((char *, char *)); |
35f5886e FF |
511 | |
512 | static void | |
1ab3bf1b | 513 | dwarf_read_array_type PARAMS ((struct dieinfo *)); |
35f5886e | 514 | |
9e4c1921 | 515 | static void |
1ab3bf1b | 516 | read_tag_pointer_type PARAMS ((struct dieinfo *dip)); |
9e4c1921 | 517 | |
ec16f701 FF |
518 | static void |
519 | read_tag_string_type PARAMS ((struct dieinfo *dip)); | |
520 | ||
35f5886e | 521 | static void |
1ab3bf1b | 522 | read_subroutine_type PARAMS ((struct dieinfo *, char *, char *)); |
35f5886e FF |
523 | |
524 | static void | |
1ab3bf1b | 525 | read_enumeration PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
526 | |
527 | static struct type * | |
1ab3bf1b | 528 | struct_type PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
529 | |
530 | static struct type * | |
1ab3bf1b | 531 | enum_type PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e | 532 | |
35f5886e | 533 | static void |
1ab3bf1b | 534 | decode_line_numbers PARAMS ((char *)); |
35f5886e FF |
535 | |
536 | static struct type * | |
1ab3bf1b | 537 | decode_die_type PARAMS ((struct dieinfo *)); |
35f5886e FF |
538 | |
539 | static struct type * | |
1ab3bf1b | 540 | decode_mod_fund_type PARAMS ((char *)); |
35f5886e FF |
541 | |
542 | static struct type * | |
1ab3bf1b | 543 | decode_mod_u_d_type PARAMS ((char *)); |
35f5886e FF |
544 | |
545 | static struct type * | |
1c92ca6f | 546 | decode_modified_type PARAMS ((char *, unsigned int, int)); |
35f5886e FF |
547 | |
548 | static struct type * | |
1ab3bf1b | 549 | decode_fund_type PARAMS ((unsigned int)); |
35f5886e FF |
550 | |
551 | static char * | |
1ab3bf1b | 552 | create_name PARAMS ((char *, struct obstack *)); |
35f5886e | 553 | |
35f5886e | 554 | static struct type * |
13b5a7ff | 555 | lookup_utype PARAMS ((DIE_REF)); |
35f5886e FF |
556 | |
557 | static struct type * | |
13b5a7ff | 558 | alloc_utype PARAMS ((DIE_REF, struct type *)); |
35f5886e FF |
559 | |
560 | static struct symbol * | |
1ab3bf1b | 561 | new_symbol PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e | 562 | |
95ff889e FF |
563 | static void |
564 | synthesize_typedef PARAMS ((struct dieinfo *, struct objfile *, | |
565 | struct type *)); | |
566 | ||
35f5886e | 567 | static int |
1ab3bf1b | 568 | locval PARAMS ((char *)); |
35f5886e | 569 | |
95ff889e FF |
570 | static void |
571 | set_cu_language PARAMS ((struct dieinfo *)); | |
572 | ||
bf229b4e FF |
573 | static struct type * |
574 | dwarf_fundamental_type PARAMS ((struct objfile *, int)); | |
575 | ||
576 | ||
577 | /* | |
578 | ||
579 | LOCAL FUNCTION | |
580 | ||
581 | dwarf_fundamental_type -- lookup or create a fundamental type | |
582 | ||
583 | SYNOPSIS | |
584 | ||
585 | struct type * | |
586 | dwarf_fundamental_type (struct objfile *objfile, int typeid) | |
587 | ||
588 | DESCRIPTION | |
589 | ||
590 | DWARF version 1 doesn't supply any fundamental type information, | |
591 | so gdb has to construct such types. It has a fixed number of | |
592 | fundamental types that it knows how to construct, which is the | |
593 | union of all types that it knows how to construct for all languages | |
594 | that it knows about. These are enumerated in gdbtypes.h. | |
595 | ||
596 | As an example, assume we find a DIE that references a DWARF | |
597 | fundamental type of FT_integer. We first look in the ftypes | |
598 | array to see if we already have such a type, indexed by the | |
599 | gdb internal value of FT_INTEGER. If so, we simply return a | |
600 | pointer to that type. If not, then we ask an appropriate | |
601 | language dependent routine to create a type FT_INTEGER, using | |
602 | defaults reasonable for the current target machine, and install | |
603 | that type in ftypes for future reference. | |
604 | ||
605 | RETURNS | |
606 | ||
607 | Pointer to a fundamental type. | |
608 | ||
609 | */ | |
610 | ||
611 | static struct type * | |
612 | dwarf_fundamental_type (objfile, typeid) | |
613 | struct objfile *objfile; | |
614 | int typeid; | |
615 | { | |
616 | if (typeid < 0 || typeid >= FT_NUM_MEMBERS) | |
617 | { | |
618 | error ("internal error - invalid fundamental type id %d", typeid); | |
619 | } | |
620 | ||
621 | /* Look for this particular type in the fundamental type vector. If one is | |
622 | not found, create and install one appropriate for the current language | |
623 | and the current target machine. */ | |
624 | ||
625 | if (ftypes[typeid] == NULL) | |
626 | { | |
627 | ftypes[typeid] = cu_language_defn -> la_fund_type(objfile, typeid); | |
628 | } | |
629 | ||
630 | return (ftypes[typeid]); | |
631 | } | |
632 | ||
95ff889e FF |
633 | /* |
634 | ||
635 | LOCAL FUNCTION | |
636 | ||
637 | set_cu_language -- set local copy of language for compilation unit | |
638 | ||
639 | SYNOPSIS | |
640 | ||
641 | void | |
642 | set_cu_language (struct dieinfo *dip) | |
643 | ||
644 | DESCRIPTION | |
645 | ||
646 | Decode the language attribute for a compilation unit DIE and | |
647 | remember what the language was. We use this at various times | |
648 | when processing DIE's for a given compilation unit. | |
649 | ||
650 | RETURNS | |
651 | ||
652 | No return value. | |
653 | ||
654 | */ | |
655 | ||
656 | static void | |
657 | set_cu_language (dip) | |
658 | struct dieinfo *dip; | |
659 | { | |
660 | switch (dip -> at_language) | |
661 | { | |
662 | case LANG_C89: | |
663 | case LANG_C: | |
664 | cu_language = language_c; | |
665 | break; | |
666 | case LANG_C_PLUS_PLUS: | |
667 | cu_language = language_cplus; | |
668 | break; | |
e58de8a2 FF |
669 | case LANG_CHILL: |
670 | cu_language = language_chill; | |
671 | break; | |
672 | case LANG_MODULA2: | |
673 | cu_language = language_m2; | |
674 | break; | |
95ff889e FF |
675 | case LANG_ADA83: |
676 | case LANG_COBOL74: | |
677 | case LANG_COBOL85: | |
678 | case LANG_FORTRAN77: | |
679 | case LANG_FORTRAN90: | |
680 | case LANG_PASCAL83: | |
2e4964ad | 681 | /* We don't know anything special about these yet. */ |
95ff889e FF |
682 | cu_language = language_unknown; |
683 | break; | |
2e4964ad FF |
684 | default: |
685 | /* If no at_language, try to deduce one from the filename */ | |
686 | cu_language = deduce_language_from_filename (dip -> at_name); | |
687 | break; | |
95ff889e | 688 | } |
bf229b4e | 689 | cu_language_defn = language_def (cu_language); |
95ff889e FF |
690 | } |
691 | ||
35f5886e FF |
692 | /* |
693 | ||
694 | GLOBAL FUNCTION | |
695 | ||
696 | dwarf_build_psymtabs -- build partial symtabs from DWARF debug info | |
697 | ||
698 | SYNOPSIS | |
699 | ||
d5931d79 | 700 | void dwarf_build_psymtabs (struct objfile *objfile, |
2670f34d | 701 | struct section_offsets *section_offsets, |
d5931d79 JG |
702 | int mainline, file_ptr dbfoff, unsigned int dbfsize, |
703 | file_ptr lnoffset, unsigned int lnsize) | |
35f5886e FF |
704 | |
705 | DESCRIPTION | |
706 | ||
707 | This function is called upon to build partial symtabs from files | |
708 | containing DIE's (Dwarf Information Entries) and DWARF line numbers. | |
709 | ||
d5931d79 | 710 | It is passed a bfd* containing the DIES |
35f5886e FF |
711 | and line number information, the corresponding filename for that |
712 | file, a base address for relocating the symbols, a flag indicating | |
713 | whether or not this debugging information is from a "main symbol | |
714 | table" rather than a shared library or dynamically linked file, | |
715 | and file offset/size pairs for the DIE information and line number | |
716 | information. | |
717 | ||
718 | RETURNS | |
719 | ||
720 | No return value. | |
721 | ||
722 | */ | |
723 | ||
724 | void | |
d5931d79 JG |
725 | dwarf_build_psymtabs (objfile, section_offsets, mainline, dbfoff, dbfsize, |
726 | lnoffset, lnsize) | |
727 | struct objfile *objfile; | |
2670f34d | 728 | struct section_offsets *section_offsets; |
1ab3bf1b | 729 | int mainline; |
d5931d79 | 730 | file_ptr dbfoff; |
4090fe1c | 731 | unsigned int dbfsize; |
d5931d79 | 732 | file_ptr lnoffset; |
1ab3bf1b | 733 | unsigned int lnsize; |
35f5886e | 734 | { |
d5931d79 | 735 | bfd *abfd = objfile->obfd; |
35f5886e FF |
736 | struct cleanup *back_to; |
737 | ||
95967e73 | 738 | current_objfile = objfile; |
4090fe1c | 739 | dbsize = dbfsize; |
35f5886e FF |
740 | dbbase = xmalloc (dbsize); |
741 | dbroff = 0; | |
d5931d79 JG |
742 | if ((bfd_seek (abfd, dbfoff, L_SET) != 0) || |
743 | (bfd_read (dbbase, dbsize, 1, abfd) != dbsize)) | |
35f5886e FF |
744 | { |
745 | free (dbbase); | |
d5931d79 | 746 | error ("can't read DWARF data from '%s'", bfd_get_filename (abfd)); |
35f5886e FF |
747 | } |
748 | back_to = make_cleanup (free, dbbase); | |
749 | ||
750 | /* If we are reinitializing, or if we have never loaded syms yet, init. | |
751 | Since we have no idea how many DIES we are looking at, we just guess | |
752 | some arbitrary value. */ | |
753 | ||
13b5a7ff FF |
754 | if (mainline || objfile -> global_psymbols.size == 0 || |
755 | objfile -> static_psymbols.size == 0) | |
35f5886e | 756 | { |
1ab3bf1b | 757 | init_psymbol_list (objfile, 1024); |
35f5886e FF |
758 | } |
759 | ||
84ffdec2 | 760 | /* Save the relocation factor where everybody can see it. */ |
f8b76e70 | 761 | |
2670f34d JG |
762 | base_section_offsets = section_offsets; |
763 | baseaddr = ANOFFSET (section_offsets, 0); | |
f8b76e70 | 764 | |
35f5886e FF |
765 | /* Follow the compilation unit sibling chain, building a partial symbol |
766 | table entry for each one. Save enough information about each compilation | |
767 | unit to locate the full DWARF information later. */ | |
768 | ||
d5931d79 | 769 | scan_compilation_units (dbbase, dbbase + dbsize, dbfoff, lnoffset, objfile); |
35f5886e | 770 | |
35f5886e | 771 | do_cleanups (back_to); |
95967e73 | 772 | current_objfile = NULL; |
35f5886e FF |
773 | } |
774 | ||
35f5886e FF |
775 | /* |
776 | ||
35f5886e FF |
777 | LOCAL FUNCTION |
778 | ||
779 | read_lexical_block_scope -- process all dies in a lexical block | |
780 | ||
781 | SYNOPSIS | |
782 | ||
783 | static void read_lexical_block_scope (struct dieinfo *dip, | |
784 | char *thisdie, char *enddie) | |
785 | ||
786 | DESCRIPTION | |
787 | ||
788 | Process all the DIES contained within a lexical block scope. | |
789 | Start a new scope, process the dies, and then close the scope. | |
790 | ||
791 | */ | |
792 | ||
793 | static void | |
1ab3bf1b JG |
794 | read_lexical_block_scope (dip, thisdie, enddie, objfile) |
795 | struct dieinfo *dip; | |
796 | char *thisdie; | |
797 | char *enddie; | |
798 | struct objfile *objfile; | |
35f5886e | 799 | { |
4d315a07 FF |
800 | register struct context_stack *new; |
801 | ||
4ed3a9ea | 802 | push_context (0, dip -> at_low_pc); |
13b5a7ff | 803 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 FF |
804 | new = pop_context (); |
805 | if (local_symbols != NULL) | |
806 | { | |
807 | finish_block (0, &local_symbols, new -> old_blocks, new -> start_addr, | |
1ab3bf1b | 808 | dip -> at_high_pc, objfile); |
4d315a07 FF |
809 | } |
810 | local_symbols = new -> locals; | |
35f5886e FF |
811 | } |
812 | ||
813 | /* | |
814 | ||
815 | LOCAL FUNCTION | |
816 | ||
817 | lookup_utype -- look up a user defined type from die reference | |
818 | ||
819 | SYNOPSIS | |
820 | ||
13b5a7ff | 821 | static type *lookup_utype (DIE_REF die_ref) |
35f5886e FF |
822 | |
823 | DESCRIPTION | |
824 | ||
825 | Given a DIE reference, lookup the user defined type associated with | |
826 | that DIE, if it has been registered already. If not registered, then | |
827 | return NULL. Alloc_utype() can be called to register an empty | |
828 | type for this reference, which will be filled in later when the | |
829 | actual referenced DIE is processed. | |
830 | */ | |
831 | ||
832 | static struct type * | |
13b5a7ff FF |
833 | lookup_utype (die_ref) |
834 | DIE_REF die_ref; | |
35f5886e FF |
835 | { |
836 | struct type *type = NULL; | |
837 | int utypeidx; | |
838 | ||
13b5a7ff | 839 | utypeidx = (die_ref - dbroff) / 4; |
35f5886e FF |
840 | if ((utypeidx < 0) || (utypeidx >= numutypes)) |
841 | { | |
51b80b00 | 842 | complain (&bad_die_ref, DIE_ID, DIE_NAME); |
35f5886e FF |
843 | } |
844 | else | |
845 | { | |
846 | type = *(utypes + utypeidx); | |
847 | } | |
848 | return (type); | |
849 | } | |
850 | ||
851 | ||
852 | /* | |
853 | ||
854 | LOCAL FUNCTION | |
855 | ||
856 | alloc_utype -- add a user defined type for die reference | |
857 | ||
858 | SYNOPSIS | |
859 | ||
13b5a7ff | 860 | static type *alloc_utype (DIE_REF die_ref, struct type *utypep) |
35f5886e FF |
861 | |
862 | DESCRIPTION | |
863 | ||
13b5a7ff | 864 | Given a die reference DIE_REF, and a possible pointer to a user |
35f5886e FF |
865 | defined type UTYPEP, register that this reference has a user |
866 | defined type and either use the specified type in UTYPEP or | |
867 | make a new empty type that will be filled in later. | |
868 | ||
869 | We should only be called after calling lookup_utype() to verify that | |
13b5a7ff | 870 | there is not currently a type registered for DIE_REF. |
35f5886e FF |
871 | */ |
872 | ||
873 | static struct type * | |
13b5a7ff FF |
874 | alloc_utype (die_ref, utypep) |
875 | DIE_REF die_ref; | |
1ab3bf1b | 876 | struct type *utypep; |
35f5886e FF |
877 | { |
878 | struct type **typep; | |
879 | int utypeidx; | |
880 | ||
13b5a7ff | 881 | utypeidx = (die_ref - dbroff) / 4; |
35f5886e FF |
882 | typep = utypes + utypeidx; |
883 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
884 | { | |
bf229b4e | 885 | utypep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
51b80b00 | 886 | complain (&bad_die_ref, DIE_ID, DIE_NAME); |
35f5886e FF |
887 | } |
888 | else if (*typep != NULL) | |
889 | { | |
890 | utypep = *typep; | |
51b80b00 | 891 | complain (&dup_user_type_allocation, DIE_ID, DIE_NAME); |
35f5886e FF |
892 | } |
893 | else | |
894 | { | |
895 | if (utypep == NULL) | |
896 | { | |
8050a57b | 897 | utypep = alloc_type (current_objfile); |
35f5886e FF |
898 | } |
899 | *typep = utypep; | |
900 | } | |
901 | return (utypep); | |
902 | } | |
903 | ||
904 | /* | |
905 | ||
906 | LOCAL FUNCTION | |
907 | ||
908 | decode_die_type -- return a type for a specified die | |
909 | ||
910 | SYNOPSIS | |
911 | ||
912 | static struct type *decode_die_type (struct dieinfo *dip) | |
913 | ||
914 | DESCRIPTION | |
915 | ||
916 | Given a pointer to a die information structure DIP, decode the | |
917 | type of the die and return a pointer to the decoded type. All | |
918 | dies without specific types default to type int. | |
919 | */ | |
920 | ||
921 | static struct type * | |
1ab3bf1b JG |
922 | decode_die_type (dip) |
923 | struct dieinfo *dip; | |
35f5886e FF |
924 | { |
925 | struct type *type = NULL; | |
926 | ||
927 | if (dip -> at_fund_type != 0) | |
928 | { | |
929 | type = decode_fund_type (dip -> at_fund_type); | |
930 | } | |
931 | else if (dip -> at_mod_fund_type != NULL) | |
932 | { | |
933 | type = decode_mod_fund_type (dip -> at_mod_fund_type); | |
934 | } | |
935 | else if (dip -> at_user_def_type) | |
936 | { | |
937 | if ((type = lookup_utype (dip -> at_user_def_type)) == NULL) | |
938 | { | |
939 | type = alloc_utype (dip -> at_user_def_type, NULL); | |
940 | } | |
941 | } | |
942 | else if (dip -> at_mod_u_d_type) | |
943 | { | |
944 | type = decode_mod_u_d_type (dip -> at_mod_u_d_type); | |
945 | } | |
946 | else | |
947 | { | |
bf229b4e | 948 | type = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
35f5886e FF |
949 | } |
950 | return (type); | |
951 | } | |
952 | ||
953 | /* | |
954 | ||
955 | LOCAL FUNCTION | |
956 | ||
957 | struct_type -- compute and return the type for a struct or union | |
958 | ||
959 | SYNOPSIS | |
960 | ||
961 | static struct type *struct_type (struct dieinfo *dip, char *thisdie, | |
8b5b6fae | 962 | char *enddie, struct objfile *objfile) |
35f5886e FF |
963 | |
964 | DESCRIPTION | |
965 | ||
966 | Given pointer to a die information structure for a die which | |
715cafcb FF |
967 | defines a union or structure (and MUST define one or the other), |
968 | and pointers to the raw die data that define the range of dies which | |
969 | define the members, compute and return the user defined type for the | |
970 | structure or union. | |
35f5886e FF |
971 | */ |
972 | ||
973 | static struct type * | |
1ab3bf1b JG |
974 | struct_type (dip, thisdie, enddie, objfile) |
975 | struct dieinfo *dip; | |
976 | char *thisdie; | |
977 | char *enddie; | |
978 | struct objfile *objfile; | |
35f5886e FF |
979 | { |
980 | struct type *type; | |
981 | struct nextfield { | |
982 | struct nextfield *next; | |
983 | struct field field; | |
984 | }; | |
985 | struct nextfield *list = NULL; | |
986 | struct nextfield *new; | |
987 | int nfields = 0; | |
988 | int n; | |
35f5886e | 989 | struct dieinfo mbr; |
8b5b6fae | 990 | char *nextdie; |
a8a69e63 | 991 | #if !BITS_BIG_ENDIAN |
50055e94 | 992 | int anonymous_size; |
a8a69e63 | 993 | #endif |
35f5886e | 994 | |
13b5a7ff | 995 | if ((type = lookup_utype (dip -> die_ref)) == NULL) |
35f5886e | 996 | { |
5edf98d7 | 997 | /* No forward references created an empty type, so install one now */ |
13b5a7ff | 998 | type = alloc_utype (dip -> die_ref, NULL); |
35f5886e | 999 | } |
a3723a43 | 1000 | INIT_CPLUS_SPECIFIC(type); |
13b5a7ff | 1001 | switch (dip -> die_tag) |
35f5886e | 1002 | { |
95ff889e FF |
1003 | case TAG_class_type: |
1004 | TYPE_CODE (type) = TYPE_CODE_CLASS; | |
95ff889e | 1005 | break; |
715cafcb | 1006 | case TAG_structure_type: |
5edf98d7 | 1007 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
715cafcb FF |
1008 | break; |
1009 | case TAG_union_type: | |
1010 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
715cafcb FF |
1011 | break; |
1012 | default: | |
1013 | /* Should never happen */ | |
1014 | TYPE_CODE (type) = TYPE_CODE_UNDEF; | |
51b80b00 | 1015 | complain (&missing_tag, DIE_ID, DIE_NAME); |
715cafcb | 1016 | break; |
35f5886e | 1017 | } |
5edf98d7 FF |
1018 | /* Some compilers try to be helpful by inventing "fake" names for |
1019 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1020 | Thanks, but no thanks... */ | |
715cafcb FF |
1021 | if (dip -> at_name != NULL |
1022 | && *dip -> at_name != '~' | |
1023 | && *dip -> at_name != '.') | |
35f5886e | 1024 | { |
b2bebdb0 JK |
1025 | TYPE_TAG_NAME (type) = obconcat (&objfile -> type_obstack, |
1026 | "", "", dip -> at_name); | |
35f5886e | 1027 | } |
50055e94 FF |
1028 | /* Use whatever size is known. Zero is a valid size. We might however |
1029 | wish to check has_at_byte_size to make sure that some byte size was | |
1030 | given explicitly, but DWARF doesn't specify that explicit sizes of | |
1031 | zero have to present, so complaining about missing sizes should | |
1032 | probably not be the default. */ | |
1033 | TYPE_LENGTH (type) = dip -> at_byte_size; | |
13b5a7ff | 1034 | thisdie += dip -> die_length; |
35f5886e FF |
1035 | while (thisdie < enddie) |
1036 | { | |
95967e73 FF |
1037 | basicdieinfo (&mbr, thisdie, objfile); |
1038 | completedieinfo (&mbr, objfile); | |
13b5a7ff | 1039 | if (mbr.die_length <= SIZEOF_DIE_LENGTH) |
35f5886e FF |
1040 | { |
1041 | break; | |
1042 | } | |
8b5b6fae FF |
1043 | else if (mbr.at_sibling != 0) |
1044 | { | |
1045 | nextdie = dbbase + mbr.at_sibling - dbroff; | |
1046 | } | |
1047 | else | |
1048 | { | |
13b5a7ff | 1049 | nextdie = thisdie + mbr.die_length; |
8b5b6fae | 1050 | } |
13b5a7ff | 1051 | switch (mbr.die_tag) |
35f5886e FF |
1052 | { |
1053 | case TAG_member: | |
1054 | /* Get space to record the next field's data. */ | |
1055 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1056 | new -> next = list; | |
1057 | list = new; | |
1058 | /* Save the data. */ | |
50e0dc41 FF |
1059 | list -> field.name = |
1060 | obsavestring (mbr.at_name, strlen (mbr.at_name), | |
1061 | &objfile -> type_obstack); | |
35f5886e FF |
1062 | list -> field.type = decode_die_type (&mbr); |
1063 | list -> field.bitpos = 8 * locval (mbr.at_location); | |
4db8e515 FF |
1064 | /* Handle bit fields. */ |
1065 | list -> field.bitsize = mbr.at_bit_size; | |
1066 | #if BITS_BIG_ENDIAN | |
1067 | /* For big endian bits, the at_bit_offset gives the additional | |
1068 | bit offset from the MSB of the containing anonymous object to | |
1069 | the MSB of the field. We don't have to do anything special | |
1070 | since we don't need to know the size of the anonymous object. */ | |
1071 | list -> field.bitpos += mbr.at_bit_offset; | |
1072 | #else | |
1073 | /* For little endian bits, we need to have a non-zero at_bit_size, | |
1074 | so that we know we are in fact dealing with a bitfield. Compute | |
1075 | the bit offset to the MSB of the anonymous object, subtract off | |
1076 | the number of bits from the MSB of the field to the MSB of the | |
1077 | object, and then subtract off the number of bits of the field | |
1078 | itself. The result is the bit offset of the LSB of the field. */ | |
1079 | if (mbr.at_bit_size > 0) | |
1080 | { | |
50055e94 FF |
1081 | if (mbr.has_at_byte_size) |
1082 | { | |
1083 | /* The size of the anonymous object containing the bit field | |
1084 | is explicit, so use the indicated size (in bytes). */ | |
1085 | anonymous_size = mbr.at_byte_size; | |
1086 | } | |
1087 | else | |
1088 | { | |
1089 | /* The size of the anonymous object containing the bit field | |
1090 | matches the size of an object of the bit field's type. | |
1091 | DWARF allows at_byte_size to be left out in such cases, | |
1092 | as a debug information size optimization. */ | |
1093 | anonymous_size = TYPE_LENGTH (list -> field.type); | |
1094 | } | |
4db8e515 | 1095 | list -> field.bitpos += |
50055e94 | 1096 | anonymous_size * 8 - mbr.at_bit_offset - mbr.at_bit_size; |
4db8e515 FF |
1097 | } |
1098 | #endif | |
35f5886e FF |
1099 | nfields++; |
1100 | break; | |
1101 | default: | |
8b5b6fae | 1102 | process_dies (thisdie, nextdie, objfile); |
35f5886e FF |
1103 | break; |
1104 | } | |
8b5b6fae | 1105 | thisdie = nextdie; |
35f5886e | 1106 | } |
5edf98d7 FF |
1107 | /* Now create the vector of fields, and record how big it is. We may |
1108 | not even have any fields, if this DIE was generated due to a reference | |
1109 | to an anonymous structure or union. In this case, TYPE_FLAG_STUB is | |
1110 | set, which clues gdb in to the fact that it needs to search elsewhere | |
1111 | for the full structure definition. */ | |
1112 | if (nfields == 0) | |
35f5886e | 1113 | { |
5edf98d7 FF |
1114 | TYPE_FLAGS (type) |= TYPE_FLAG_STUB; |
1115 | } | |
1116 | else | |
1117 | { | |
1118 | TYPE_NFIELDS (type) = nfields; | |
1119 | TYPE_FIELDS (type) = (struct field *) | |
dac9734e | 1120 | TYPE_ALLOC (type, sizeof (struct field) * nfields); |
5edf98d7 FF |
1121 | /* Copy the saved-up fields into the field vector. */ |
1122 | for (n = nfields; list; list = list -> next) | |
1123 | { | |
1124 | TYPE_FIELD (type, --n) = list -> field; | |
1125 | } | |
1126 | } | |
35f5886e FF |
1127 | return (type); |
1128 | } | |
1129 | ||
1130 | /* | |
1131 | ||
1132 | LOCAL FUNCTION | |
1133 | ||
1134 | read_structure_scope -- process all dies within struct or union | |
1135 | ||
1136 | SYNOPSIS | |
1137 | ||
1138 | static void read_structure_scope (struct dieinfo *dip, | |
8b5b6fae | 1139 | char *thisdie, char *enddie, struct objfile *objfile) |
35f5886e FF |
1140 | |
1141 | DESCRIPTION | |
1142 | ||
1143 | Called when we find the DIE that starts a structure or union | |
1144 | scope (definition) to process all dies that define the members | |
1145 | of the structure or union. DIP is a pointer to the die info | |
1146 | struct for the DIE that names the structure or union. | |
1147 | ||
1148 | NOTES | |
1149 | ||
1150 | Note that we need to call struct_type regardless of whether or not | |
84ce6717 FF |
1151 | the DIE has an at_name attribute, since it might be an anonymous |
1152 | structure or union. This gets the type entered into our set of | |
1153 | user defined types. | |
1154 | ||
1155 | However, if the structure is incomplete (an opaque struct/union) | |
1156 | then suppress creating a symbol table entry for it since gdb only | |
1157 | wants to find the one with the complete definition. Note that if | |
1158 | it is complete, we just call new_symbol, which does it's own | |
1159 | checking about whether the struct/union is anonymous or not (and | |
1160 | suppresses creating a symbol table entry itself). | |
1161 | ||
35f5886e FF |
1162 | */ |
1163 | ||
1164 | static void | |
1ab3bf1b JG |
1165 | read_structure_scope (dip, thisdie, enddie, objfile) |
1166 | struct dieinfo *dip; | |
1167 | char *thisdie; | |
1168 | char *enddie; | |
1169 | struct objfile *objfile; | |
35f5886e FF |
1170 | { |
1171 | struct type *type; | |
1172 | struct symbol *sym; | |
1173 | ||
8b5b6fae | 1174 | type = struct_type (dip, thisdie, enddie, objfile); |
84ce6717 | 1175 | if (!(TYPE_FLAGS (type) & TYPE_FLAG_STUB)) |
35f5886e | 1176 | { |
95ff889e FF |
1177 | sym = new_symbol (dip, objfile); |
1178 | if (sym != NULL) | |
84ce6717 FF |
1179 | { |
1180 | SYMBOL_TYPE (sym) = type; | |
95ff889e FF |
1181 | if (cu_language == language_cplus) |
1182 | { | |
1183 | synthesize_typedef (dip, objfile, type); | |
1184 | } | |
84ce6717 | 1185 | } |
35f5886e FF |
1186 | } |
1187 | } | |
1188 | ||
1189 | /* | |
1190 | ||
1191 | LOCAL FUNCTION | |
1192 | ||
1193 | decode_array_element_type -- decode type of the array elements | |
1194 | ||
1195 | SYNOPSIS | |
1196 | ||
1197 | static struct type *decode_array_element_type (char *scan, char *end) | |
1198 | ||
1199 | DESCRIPTION | |
1200 | ||
1201 | As the last step in decoding the array subscript information for an | |
1202 | array DIE, we need to decode the type of the array elements. We are | |
1203 | passed a pointer to this last part of the subscript information and | |
1204 | must return the appropriate type. If the type attribute is not | |
1205 | recognized, just warn about the problem and return type int. | |
1206 | */ | |
1207 | ||
1208 | static struct type * | |
84ffdec2 | 1209 | decode_array_element_type (scan) |
1ab3bf1b | 1210 | char *scan; |
35f5886e FF |
1211 | { |
1212 | struct type *typep; | |
13b5a7ff FF |
1213 | DIE_REF die_ref; |
1214 | unsigned short attribute; | |
35f5886e | 1215 | unsigned short fundtype; |
13b5a7ff | 1216 | int nbytes; |
35f5886e | 1217 | |
13b5a7ff FF |
1218 | attribute = target_to_host (scan, SIZEOF_ATTRIBUTE, GET_UNSIGNED, |
1219 | current_objfile); | |
1220 | scan += SIZEOF_ATTRIBUTE; | |
1221 | if ((nbytes = attribute_size (attribute)) == -1) | |
1222 | { | |
51b80b00 | 1223 | complain (&bad_array_element_type, DIE_ID, DIE_NAME, attribute); |
bf229b4e | 1224 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff FF |
1225 | } |
1226 | else | |
1227 | { | |
1228 | switch (attribute) | |
1229 | { | |
1230 | case AT_fund_type: | |
1231 | fundtype = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1232 | current_objfile); | |
1233 | typep = decode_fund_type (fundtype); | |
1234 | break; | |
1235 | case AT_mod_fund_type: | |
1236 | typep = decode_mod_fund_type (scan); | |
1237 | break; | |
1238 | case AT_user_def_type: | |
1239 | die_ref = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1240 | current_objfile); | |
1241 | if ((typep = lookup_utype (die_ref)) == NULL) | |
1242 | { | |
1243 | typep = alloc_utype (die_ref, NULL); | |
1244 | } | |
1245 | break; | |
1246 | case AT_mod_u_d_type: | |
1247 | typep = decode_mod_u_d_type (scan); | |
1248 | break; | |
1249 | default: | |
51b80b00 | 1250 | complain (&bad_array_element_type, DIE_ID, DIE_NAME, attribute); |
bf229b4e | 1251 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff FF |
1252 | break; |
1253 | } | |
35f5886e FF |
1254 | } |
1255 | return (typep); | |
1256 | } | |
1257 | ||
1258 | /* | |
1259 | ||
1260 | LOCAL FUNCTION | |
1261 | ||
85f0a848 | 1262 | decode_subscript_data_item -- decode array subscript item |
35f5886e FF |
1263 | |
1264 | SYNOPSIS | |
1265 | ||
85f0a848 FF |
1266 | static struct type * |
1267 | decode_subscript_data_item (char *scan, char *end) | |
35f5886e FF |
1268 | |
1269 | DESCRIPTION | |
1270 | ||
1271 | The array subscripts and the data type of the elements of an | |
1272 | array are described by a list of data items, stored as a block | |
1273 | of contiguous bytes. There is a data item describing each array | |
1274 | dimension, and a final data item describing the element type. | |
1275 | The data items are ordered the same as their appearance in the | |
1276 | source (I.E. leftmost dimension first, next to leftmost second, | |
1277 | etc). | |
1278 | ||
85f0a848 FF |
1279 | The data items describing each array dimension consist of four |
1280 | parts: (1) a format specifier, (2) type type of the subscript | |
1281 | index, (3) a description of the low bound of the array dimension, | |
1282 | and (4) a description of the high bound of the array dimension. | |
1283 | ||
1284 | The last data item is the description of the type of each of | |
1285 | the array elements. | |
1286 | ||
35f5886e | 1287 | We are passed a pointer to the start of the block of bytes |
85f0a848 FF |
1288 | containing the remaining data items, and a pointer to the first |
1289 | byte past the data. This function recursively decodes the | |
1290 | remaining data items and returns a type. | |
1291 | ||
1292 | If we somehow fail to decode some data, we complain about it | |
1293 | and return a type "array of int". | |
35f5886e FF |
1294 | |
1295 | BUGS | |
1296 | FIXME: This code only implements the forms currently used | |
1297 | by the AT&T and GNU C compilers. | |
1298 | ||
1299 | The end pointer is supplied for error checking, maybe we should | |
1300 | use it for that... | |
1301 | */ | |
1302 | ||
1303 | static struct type * | |
85f0a848 | 1304 | decode_subscript_data_item (scan, end) |
1ab3bf1b JG |
1305 | char *scan; |
1306 | char *end; | |
35f5886e | 1307 | { |
85f0a848 FF |
1308 | struct type *typep = NULL; /* Array type we are building */ |
1309 | struct type *nexttype; /* Type of each element (may be array) */ | |
1310 | struct type *indextype; /* Type of this index */ | |
a8a69e63 | 1311 | struct type *rangetype; |
13b5a7ff FF |
1312 | unsigned int format; |
1313 | unsigned short fundtype; | |
1314 | unsigned long lowbound; | |
1315 | unsigned long highbound; | |
1316 | int nbytes; | |
35f5886e | 1317 | |
13b5a7ff FF |
1318 | format = target_to_host (scan, SIZEOF_FORMAT_SPECIFIER, GET_UNSIGNED, |
1319 | current_objfile); | |
1320 | scan += SIZEOF_FORMAT_SPECIFIER; | |
35f5886e FF |
1321 | switch (format) |
1322 | { | |
1323 | case FMT_ET: | |
84ffdec2 | 1324 | typep = decode_array_element_type (scan); |
35f5886e FF |
1325 | break; |
1326 | case FMT_FT_C_C: | |
13b5a7ff FF |
1327 | fundtype = target_to_host (scan, SIZEOF_FMT_FT, GET_UNSIGNED, |
1328 | current_objfile); | |
85f0a848 | 1329 | indextype = decode_fund_type (fundtype); |
13b5a7ff | 1330 | scan += SIZEOF_FMT_FT; |
160be0de FF |
1331 | nbytes = TARGET_FT_LONG_SIZE (current_objfile); |
1332 | lowbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1333 | scan += nbytes; | |
1334 | highbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1335 | scan += nbytes; | |
85f0a848 FF |
1336 | nexttype = decode_subscript_data_item (scan, end); |
1337 | if (nexttype == NULL) | |
35f5886e | 1338 | { |
85f0a848 | 1339 | /* Munged subscript data or other problem, fake it. */ |
51b80b00 | 1340 | complain (&subscript_data_items, DIE_ID, DIE_NAME); |
85f0a848 FF |
1341 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1342 | } | |
a8a69e63 FF |
1343 | rangetype = create_range_type ((struct type *) NULL, indextype, |
1344 | lowbound, highbound); | |
1345 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
35f5886e FF |
1346 | break; |
1347 | case FMT_FT_C_X: | |
1348 | case FMT_FT_X_C: | |
1349 | case FMT_FT_X_X: | |
1350 | case FMT_UT_C_C: | |
1351 | case FMT_UT_C_X: | |
1352 | case FMT_UT_X_C: | |
1353 | case FMT_UT_X_X: | |
51b80b00 | 1354 | complain (&unhandled_array_subscript_format, DIE_ID, DIE_NAME, format); |
a8a69e63 FF |
1355 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1356 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1357 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
35f5886e FF |
1358 | break; |
1359 | default: | |
51b80b00 | 1360 | complain (&unknown_array_subscript_format, DIE_ID, DIE_NAME, format); |
a8a69e63 FF |
1361 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1362 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1363 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
35f5886e FF |
1364 | break; |
1365 | } | |
1366 | return (typep); | |
1367 | } | |
1368 | ||
1369 | /* | |
1370 | ||
1371 | LOCAL FUNCTION | |
1372 | ||
4d315a07 | 1373 | dwarf_read_array_type -- read TAG_array_type DIE |
35f5886e FF |
1374 | |
1375 | SYNOPSIS | |
1376 | ||
4d315a07 | 1377 | static void dwarf_read_array_type (struct dieinfo *dip) |
35f5886e FF |
1378 | |
1379 | DESCRIPTION | |
1380 | ||
1381 | Extract all information from a TAG_array_type DIE and add to | |
1382 | the user defined type vector. | |
1383 | */ | |
1384 | ||
1385 | static void | |
1ab3bf1b JG |
1386 | dwarf_read_array_type (dip) |
1387 | struct dieinfo *dip; | |
35f5886e FF |
1388 | { |
1389 | struct type *type; | |
af213624 | 1390 | struct type *utype; |
35f5886e FF |
1391 | char *sub; |
1392 | char *subend; | |
13b5a7ff FF |
1393 | unsigned short blocksz; |
1394 | int nbytes; | |
35f5886e FF |
1395 | |
1396 | if (dip -> at_ordering != ORD_row_major) | |
1397 | { | |
1398 | /* FIXME: Can gdb even handle column major arrays? */ | |
51b80b00 | 1399 | complain (¬_row_major, DIE_ID, DIE_NAME); |
35f5886e FF |
1400 | } |
1401 | if ((sub = dip -> at_subscr_data) != NULL) | |
1402 | { | |
13b5a7ff FF |
1403 | nbytes = attribute_size (AT_subscr_data); |
1404 | blocksz = target_to_host (sub, nbytes, GET_UNSIGNED, current_objfile); | |
1405 | subend = sub + nbytes + blocksz; | |
1406 | sub += nbytes; | |
85f0a848 FF |
1407 | type = decode_subscript_data_item (sub, subend); |
1408 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) | |
35f5886e | 1409 | { |
85f0a848 FF |
1410 | /* Install user defined type that has not been referenced yet. */ |
1411 | alloc_utype (dip -> die_ref, type); | |
1412 | } | |
1413 | else if (TYPE_CODE (utype) == TYPE_CODE_UNDEF) | |
1414 | { | |
1415 | /* Ick! A forward ref has already generated a blank type in our | |
1416 | slot, and this type probably already has things pointing to it | |
1417 | (which is what caused it to be created in the first place). | |
1418 | If it's just a place holder we can plop our fully defined type | |
1419 | on top of it. We can't recover the space allocated for our | |
1420 | new type since it might be on an obstack, but we could reuse | |
1421 | it if we kept a list of them, but it might not be worth it | |
1422 | (FIXME). */ | |
1423 | *utype = *type; | |
35f5886e FF |
1424 | } |
1425 | else | |
1426 | { | |
85f0a848 FF |
1427 | /* Double ick! Not only is a type already in our slot, but |
1428 | someone has decorated it. Complain and leave it alone. */ | |
51b80b00 | 1429 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); |
35f5886e FF |
1430 | } |
1431 | } | |
1432 | } | |
1433 | ||
1434 | /* | |
1435 | ||
9e4c1921 FF |
1436 | LOCAL FUNCTION |
1437 | ||
1438 | read_tag_pointer_type -- read TAG_pointer_type DIE | |
1439 | ||
1440 | SYNOPSIS | |
1441 | ||
1442 | static void read_tag_pointer_type (struct dieinfo *dip) | |
1443 | ||
1444 | DESCRIPTION | |
1445 | ||
1446 | Extract all information from a TAG_pointer_type DIE and add to | |
1447 | the user defined type vector. | |
1448 | */ | |
1449 | ||
1450 | static void | |
1ab3bf1b JG |
1451 | read_tag_pointer_type (dip) |
1452 | struct dieinfo *dip; | |
9e4c1921 FF |
1453 | { |
1454 | struct type *type; | |
1455 | struct type *utype; | |
9e4c1921 FF |
1456 | |
1457 | type = decode_die_type (dip); | |
13b5a7ff | 1458 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) |
9e4c1921 FF |
1459 | { |
1460 | utype = lookup_pointer_type (type); | |
4ed3a9ea | 1461 | alloc_utype (dip -> die_ref, utype); |
9e4c1921 FF |
1462 | } |
1463 | else | |
1464 | { | |
1465 | TYPE_TARGET_TYPE (utype) = type; | |
1466 | TYPE_POINTER_TYPE (type) = utype; | |
1467 | ||
1468 | /* We assume the machine has only one representation for pointers! */ | |
1469 | /* FIXME: This confuses host<->target data representations, and is a | |
1470 | poor assumption besides. */ | |
1471 | ||
1472 | TYPE_LENGTH (utype) = sizeof (char *); | |
1473 | TYPE_CODE (utype) = TYPE_CODE_PTR; | |
1474 | } | |
1475 | } | |
1476 | ||
1477 | /* | |
1478 | ||
ec16f701 FF |
1479 | LOCAL FUNCTION |
1480 | ||
1481 | read_tag_string_type -- read TAG_string_type DIE | |
1482 | ||
1483 | SYNOPSIS | |
1484 | ||
1485 | static void read_tag_string_type (struct dieinfo *dip) | |
1486 | ||
1487 | DESCRIPTION | |
1488 | ||
1489 | Extract all information from a TAG_string_type DIE and add to | |
1490 | the user defined type vector. It isn't really a user defined | |
1491 | type, but it behaves like one, with other DIE's using an | |
1492 | AT_user_def_type attribute to reference it. | |
1493 | */ | |
1494 | ||
1495 | static void | |
1496 | read_tag_string_type (dip) | |
1497 | struct dieinfo *dip; | |
1498 | { | |
1499 | struct type *utype; | |
1500 | struct type *indextype; | |
1501 | struct type *rangetype; | |
1502 | unsigned long lowbound = 0; | |
1503 | unsigned long highbound; | |
1504 | ||
b6236d6e | 1505 | if (dip -> has_at_byte_size) |
ec16f701 | 1506 | { |
b6236d6e FF |
1507 | /* A fixed bounds string */ |
1508 | highbound = dip -> at_byte_size - 1; | |
ec16f701 FF |
1509 | } |
1510 | else | |
1511 | { | |
b6236d6e FF |
1512 | /* A varying length string. Stub for now. (FIXME) */ |
1513 | highbound = 1; | |
1514 | } | |
1515 | indextype = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1516 | rangetype = create_range_type ((struct type *) NULL, indextype, lowbound, | |
1517 | highbound); | |
1518 | ||
1519 | utype = lookup_utype (dip -> die_ref); | |
1520 | if (utype == NULL) | |
1521 | { | |
1522 | /* No type defined, go ahead and create a blank one to use. */ | |
1523 | utype = alloc_utype (dip -> die_ref, (struct type *) NULL); | |
1524 | } | |
1525 | else | |
1526 | { | |
1527 | /* Already a type in our slot due to a forward reference. Make sure it | |
1528 | is a blank one. If not, complain and leave it alone. */ | |
1529 | if (TYPE_CODE (utype) != TYPE_CODE_UNDEF) | |
ec16f701 | 1530 | { |
b6236d6e FF |
1531 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); |
1532 | return; | |
ec16f701 | 1533 | } |
ec16f701 | 1534 | } |
b6236d6e FF |
1535 | |
1536 | /* Create the string type using the blank type we either found or created. */ | |
1537 | utype = create_string_type (utype, rangetype); | |
ec16f701 FF |
1538 | } |
1539 | ||
1540 | /* | |
1541 | ||
35f5886e FF |
1542 | LOCAL FUNCTION |
1543 | ||
1544 | read_subroutine_type -- process TAG_subroutine_type dies | |
1545 | ||
1546 | SYNOPSIS | |
1547 | ||
1548 | static void read_subroutine_type (struct dieinfo *dip, char thisdie, | |
1549 | char *enddie) | |
1550 | ||
1551 | DESCRIPTION | |
1552 | ||
1553 | Handle DIES due to C code like: | |
1554 | ||
1555 | struct foo { | |
1556 | int (*funcp)(int a, long l); (Generates TAG_subroutine_type DIE) | |
1557 | int b; | |
1558 | }; | |
1559 | ||
1560 | NOTES | |
1561 | ||
1562 | The parameter DIES are currently ignored. See if gdb has a way to | |
1563 | include this info in it's type system, and decode them if so. Is | |
1564 | this what the type structure's "arg_types" field is for? (FIXME) | |
1565 | */ | |
1566 | ||
1567 | static void | |
1ab3bf1b JG |
1568 | read_subroutine_type (dip, thisdie, enddie) |
1569 | struct dieinfo *dip; | |
1570 | char *thisdie; | |
1571 | char *enddie; | |
35f5886e | 1572 | { |
af213624 FF |
1573 | struct type *type; /* Type that this function returns */ |
1574 | struct type *ftype; /* Function that returns above type */ | |
35f5886e | 1575 | |
af213624 FF |
1576 | /* Decode the type that this subroutine returns */ |
1577 | ||
35f5886e | 1578 | type = decode_die_type (dip); |
af213624 FF |
1579 | |
1580 | /* Check to see if we already have a partially constructed user | |
1581 | defined type for this DIE, from a forward reference. */ | |
1582 | ||
13b5a7ff | 1583 | if ((ftype = lookup_utype (dip -> die_ref)) == NULL) |
af213624 FF |
1584 | { |
1585 | /* This is the first reference to one of these types. Make | |
1586 | a new one and place it in the user defined types. */ | |
1587 | ftype = lookup_function_type (type); | |
4ed3a9ea | 1588 | alloc_utype (dip -> die_ref, ftype); |
af213624 | 1589 | } |
85f0a848 | 1590 | else if (TYPE_CODE (ftype) == TYPE_CODE_UNDEF) |
af213624 FF |
1591 | { |
1592 | /* We have an existing partially constructed type, so bash it | |
1593 | into the correct type. */ | |
1594 | TYPE_TARGET_TYPE (ftype) = type; | |
1595 | TYPE_FUNCTION_TYPE (type) = ftype; | |
1596 | TYPE_LENGTH (ftype) = 1; | |
1597 | TYPE_CODE (ftype) = TYPE_CODE_FUNC; | |
1598 | } | |
85f0a848 FF |
1599 | else |
1600 | { | |
51b80b00 | 1601 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); |
85f0a848 | 1602 | } |
35f5886e FF |
1603 | } |
1604 | ||
1605 | /* | |
1606 | ||
1607 | LOCAL FUNCTION | |
1608 | ||
1609 | read_enumeration -- process dies which define an enumeration | |
1610 | ||
1611 | SYNOPSIS | |
1612 | ||
1613 | static void read_enumeration (struct dieinfo *dip, char *thisdie, | |
1ab3bf1b | 1614 | char *enddie, struct objfile *objfile) |
35f5886e FF |
1615 | |
1616 | DESCRIPTION | |
1617 | ||
1618 | Given a pointer to a die which begins an enumeration, process all | |
1619 | the dies that define the members of the enumeration. | |
1620 | ||
1621 | NOTES | |
1622 | ||
1623 | Note that we need to call enum_type regardless of whether or not we | |
1624 | have a symbol, since we might have an enum without a tag name (thus | |
1625 | no symbol for the tagname). | |
1626 | */ | |
1627 | ||
1628 | static void | |
1ab3bf1b JG |
1629 | read_enumeration (dip, thisdie, enddie, objfile) |
1630 | struct dieinfo *dip; | |
1631 | char *thisdie; | |
1632 | char *enddie; | |
1633 | struct objfile *objfile; | |
35f5886e FF |
1634 | { |
1635 | struct type *type; | |
1636 | struct symbol *sym; | |
1637 | ||
1ab3bf1b | 1638 | type = enum_type (dip, objfile); |
95ff889e FF |
1639 | sym = new_symbol (dip, objfile); |
1640 | if (sym != NULL) | |
35f5886e FF |
1641 | { |
1642 | SYMBOL_TYPE (sym) = type; | |
95ff889e FF |
1643 | if (cu_language == language_cplus) |
1644 | { | |
1645 | synthesize_typedef (dip, objfile, type); | |
1646 | } | |
35f5886e FF |
1647 | } |
1648 | } | |
1649 | ||
1650 | /* | |
1651 | ||
1652 | LOCAL FUNCTION | |
1653 | ||
1654 | enum_type -- decode and return a type for an enumeration | |
1655 | ||
1656 | SYNOPSIS | |
1657 | ||
1ab3bf1b | 1658 | static type *enum_type (struct dieinfo *dip, struct objfile *objfile) |
35f5886e FF |
1659 | |
1660 | DESCRIPTION | |
1661 | ||
1662 | Given a pointer to a die information structure for the die which | |
1663 | starts an enumeration, process all the dies that define the members | |
1664 | of the enumeration and return a type pointer for the enumeration. | |
98618bf7 | 1665 | |
715cafcb FF |
1666 | At the same time, for each member of the enumeration, create a |
1667 | symbol for it with namespace VAR_NAMESPACE and class LOC_CONST, | |
1668 | and give it the type of the enumeration itself. | |
1669 | ||
1670 | NOTES | |
1671 | ||
98618bf7 FF |
1672 | Note that the DWARF specification explicitly mandates that enum |
1673 | constants occur in reverse order from the source program order, | |
1674 | for "consistency" and because this ordering is easier for many | |
1ab3bf1b | 1675 | compilers to generate. (Draft 6, sec 3.8.5, Enumeration type |
715cafcb FF |
1676 | Entries). Because gdb wants to see the enum members in program |
1677 | source order, we have to ensure that the order gets reversed while | |
98618bf7 | 1678 | we are processing them. |
35f5886e FF |
1679 | */ |
1680 | ||
1681 | static struct type * | |
1ab3bf1b JG |
1682 | enum_type (dip, objfile) |
1683 | struct dieinfo *dip; | |
1684 | struct objfile *objfile; | |
35f5886e FF |
1685 | { |
1686 | struct type *type; | |
1687 | struct nextfield { | |
1688 | struct nextfield *next; | |
1689 | struct field field; | |
1690 | }; | |
1691 | struct nextfield *list = NULL; | |
1692 | struct nextfield *new; | |
1693 | int nfields = 0; | |
1694 | int n; | |
35f5886e FF |
1695 | char *scan; |
1696 | char *listend; | |
13b5a7ff | 1697 | unsigned short blocksz; |
715cafcb | 1698 | struct symbol *sym; |
13b5a7ff | 1699 | int nbytes; |
35f5886e | 1700 | |
13b5a7ff | 1701 | if ((type = lookup_utype (dip -> die_ref)) == NULL) |
35f5886e | 1702 | { |
84ce6717 | 1703 | /* No forward references created an empty type, so install one now */ |
13b5a7ff | 1704 | type = alloc_utype (dip -> die_ref, NULL); |
35f5886e FF |
1705 | } |
1706 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
84ce6717 FF |
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... */ | |
715cafcb FF |
1710 | if (dip -> at_name != NULL |
1711 | && *dip -> at_name != '~' | |
1712 | && *dip -> at_name != '.') | |
35f5886e | 1713 | { |
b2bebdb0 JK |
1714 | TYPE_TAG_NAME (type) = obconcat (&objfile -> type_obstack, |
1715 | "", "", dip -> at_name); | |
35f5886e | 1716 | } |
715cafcb | 1717 | if (dip -> at_byte_size != 0) |
35f5886e FF |
1718 | { |
1719 | TYPE_LENGTH (type) = dip -> at_byte_size; | |
35f5886e | 1720 | } |
35f5886e FF |
1721 | if ((scan = dip -> at_element_list) != NULL) |
1722 | { | |
768be6e1 FF |
1723 | if (dip -> short_element_list) |
1724 | { | |
13b5a7ff | 1725 | nbytes = attribute_size (AT_short_element_list); |
768be6e1 FF |
1726 | } |
1727 | else | |
1728 | { | |
13b5a7ff | 1729 | nbytes = attribute_size (AT_element_list); |
768be6e1 | 1730 | } |
13b5a7ff FF |
1731 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); |
1732 | listend = scan + nbytes + blocksz; | |
1733 | scan += nbytes; | |
35f5886e FF |
1734 | while (scan < listend) |
1735 | { | |
1736 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1737 | new -> next = list; | |
1738 | list = new; | |
1739 | list -> field.type = NULL; | |
1740 | list -> field.bitsize = 0; | |
13b5a7ff FF |
1741 | list -> field.bitpos = |
1742 | target_to_host (scan, TARGET_FT_LONG_SIZE (objfile), GET_SIGNED, | |
1743 | objfile); | |
1744 | scan += TARGET_FT_LONG_SIZE (objfile); | |
50e0dc41 FF |
1745 | list -> field.name = obsavestring (scan, strlen (scan), |
1746 | &objfile -> type_obstack); | |
35f5886e FF |
1747 | scan += strlen (scan) + 1; |
1748 | nfields++; | |
715cafcb | 1749 | /* Handcraft a new symbol for this enum member. */ |
1ab3bf1b | 1750 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
715cafcb | 1751 | sizeof (struct symbol)); |
4ed3a9ea | 1752 | memset (sym, 0, sizeof (struct symbol)); |
13b5a7ff FF |
1753 | SYMBOL_NAME (sym) = create_name (list -> field.name, |
1754 | &objfile->symbol_obstack); | |
7532cf10 | 1755 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); |
715cafcb FF |
1756 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
1757 | SYMBOL_CLASS (sym) = LOC_CONST; | |
1758 | SYMBOL_TYPE (sym) = type; | |
1759 | SYMBOL_VALUE (sym) = list -> field.bitpos; | |
4d315a07 | 1760 | add_symbol_to_list (sym, list_in_scope); |
35f5886e | 1761 | } |
84ce6717 | 1762 | /* Now create the vector of fields, and record how big it is. This is |
0efe20a6 | 1763 | where we reverse the order, by pulling the members off the list in |
84ce6717 FF |
1764 | reverse order from how they were inserted. If we have no fields |
1765 | (this is apparently possible in C++) then skip building a field | |
1766 | vector. */ | |
1767 | if (nfields > 0) | |
1768 | { | |
1769 | TYPE_NFIELDS (type) = nfields; | |
1770 | TYPE_FIELDS (type) = (struct field *) | |
1ab3bf1b | 1771 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct field) * nfields); |
84ce6717 FF |
1772 | /* Copy the saved-up fields into the field vector. */ |
1773 | for (n = 0; (n < nfields) && (list != NULL); list = list -> next) | |
1774 | { | |
1775 | TYPE_FIELD (type, n++) = list -> field; | |
1776 | } | |
1777 | } | |
35f5886e | 1778 | } |
35f5886e FF |
1779 | return (type); |
1780 | } | |
1781 | ||
1782 | /* | |
1783 | ||
1784 | LOCAL FUNCTION | |
1785 | ||
1786 | read_func_scope -- process all dies within a function scope | |
1787 | ||
35f5886e FF |
1788 | DESCRIPTION |
1789 | ||
1790 | Process all dies within a given function scope. We are passed | |
1791 | a die information structure pointer DIP for the die which | |
1792 | starts the function scope, and pointers into the raw die data | |
1793 | that define the dies within the function scope. | |
1794 | ||
1795 | For now, we ignore lexical block scopes within the function. | |
1796 | The problem is that AT&T cc does not define a DWARF lexical | |
1797 | block scope for the function itself, while gcc defines a | |
1798 | lexical block scope for the function. We need to think about | |
1799 | how to handle this difference, or if it is even a problem. | |
1800 | (FIXME) | |
1801 | */ | |
1802 | ||
1803 | static void | |
1ab3bf1b JG |
1804 | read_func_scope (dip, thisdie, enddie, objfile) |
1805 | struct dieinfo *dip; | |
1806 | char *thisdie; | |
1807 | char *enddie; | |
1808 | struct objfile *objfile; | |
35f5886e | 1809 | { |
4d315a07 | 1810 | register struct context_stack *new; |
35f5886e | 1811 | |
5e2e79f8 FF |
1812 | if (objfile -> ei.entry_point >= dip -> at_low_pc && |
1813 | objfile -> ei.entry_point < dip -> at_high_pc) | |
35f5886e | 1814 | { |
5e2e79f8 FF |
1815 | objfile -> ei.entry_func_lowpc = dip -> at_low_pc; |
1816 | objfile -> ei.entry_func_highpc = dip -> at_high_pc; | |
35f5886e | 1817 | } |
4d315a07 | 1818 | if (STREQ (dip -> at_name, "main")) /* FIXME: hardwired name */ |
35f5886e | 1819 | { |
5e2e79f8 FF |
1820 | objfile -> ei.main_func_lowpc = dip -> at_low_pc; |
1821 | objfile -> ei.main_func_highpc = dip -> at_high_pc; | |
35f5886e | 1822 | } |
4d315a07 | 1823 | new = push_context (0, dip -> at_low_pc); |
1ab3bf1b | 1824 | new -> name = new_symbol (dip, objfile); |
4d315a07 | 1825 | list_in_scope = &local_symbols; |
13b5a7ff | 1826 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 FF |
1827 | new = pop_context (); |
1828 | /* Make a block for the local symbols within. */ | |
1829 | finish_block (new -> name, &local_symbols, new -> old_blocks, | |
1ab3bf1b | 1830 | new -> start_addr, dip -> at_high_pc, objfile); |
4d315a07 | 1831 | list_in_scope = &file_symbols; |
35f5886e FF |
1832 | } |
1833 | ||
2dbde378 FF |
1834 | |
1835 | /* | |
1836 | ||
1837 | LOCAL FUNCTION | |
1838 | ||
1839 | handle_producer -- process the AT_producer attribute | |
1840 | ||
1841 | DESCRIPTION | |
1842 | ||
1843 | Perform any operations that depend on finding a particular | |
1844 | AT_producer attribute. | |
1845 | ||
1846 | */ | |
1847 | ||
1848 | static void | |
1849 | handle_producer (producer) | |
1850 | char *producer; | |
1851 | { | |
1852 | ||
1853 | /* If this compilation unit was compiled with g++ or gcc, then set the | |
1854 | processing_gcc_compilation flag. */ | |
1855 | ||
1856 | processing_gcc_compilation = | |
1857 | STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER)) | |
93bb6e65 | 1858 | || STREQN (producer, CHILL_PRODUCER, strlen (CHILL_PRODUCER)) |
2dbde378 FF |
1859 | || STREQN (producer, GCC_PRODUCER, strlen (GCC_PRODUCER)); |
1860 | ||
1861 | /* Select a demangling style if we can identify the producer and if | |
1862 | the current style is auto. We leave the current style alone if it | |
1863 | is not auto. We also leave the demangling style alone if we find a | |
1864 | gcc (cc1) producer, as opposed to a g++ (cc1plus) producer. */ | |
1865 | ||
3dc755fb | 1866 | if (AUTO_DEMANGLING) |
2dbde378 FF |
1867 | { |
1868 | if (STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER))) | |
1869 | { | |
1870 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); | |
1871 | } | |
1872 | else if (STREQN (producer, LCC_PRODUCER, strlen (LCC_PRODUCER))) | |
1873 | { | |
1874 | set_demangling_style (LUCID_DEMANGLING_STYLE_STRING); | |
1875 | } | |
2dbde378 | 1876 | } |
2dbde378 FF |
1877 | } |
1878 | ||
1879 | ||
35f5886e FF |
1880 | /* |
1881 | ||
1882 | LOCAL FUNCTION | |
1883 | ||
1884 | read_file_scope -- process all dies within a file scope | |
1885 | ||
35f5886e FF |
1886 | DESCRIPTION |
1887 | ||
1888 | Process all dies within a given file scope. We are passed a | |
1889 | pointer to the die information structure for the die which | |
1890 | starts the file scope, and pointers into the raw die data which | |
1891 | mark the range of dies within the file scope. | |
1892 | ||
1893 | When the partial symbol table is built, the file offset for the line | |
1894 | number table for each compilation unit is saved in the partial symbol | |
1895 | table entry for that compilation unit. As the symbols for each | |
1896 | compilation unit are read, the line number table is read into memory | |
1897 | and the variable lnbase is set to point to it. Thus all we have to | |
1898 | do is use lnbase to access the line number table for the current | |
1899 | compilation unit. | |
1900 | */ | |
1901 | ||
1902 | static void | |
1ab3bf1b JG |
1903 | read_file_scope (dip, thisdie, enddie, objfile) |
1904 | struct dieinfo *dip; | |
1905 | char *thisdie; | |
1906 | char *enddie; | |
1907 | struct objfile *objfile; | |
35f5886e FF |
1908 | { |
1909 | struct cleanup *back_to; | |
4d315a07 | 1910 | struct symtab *symtab; |
35f5886e | 1911 | |
5e2e79f8 FF |
1912 | if (objfile -> ei.entry_point >= dip -> at_low_pc && |
1913 | objfile -> ei.entry_point < dip -> at_high_pc) | |
35f5886e | 1914 | { |
5e2e79f8 FF |
1915 | objfile -> ei.entry_file_lowpc = dip -> at_low_pc; |
1916 | objfile -> ei.entry_file_highpc = dip -> at_high_pc; | |
35f5886e | 1917 | } |
95ff889e | 1918 | set_cu_language (dip); |
4d315a07 FF |
1919 | if (dip -> at_producer != NULL) |
1920 | { | |
2dbde378 | 1921 | handle_producer (dip -> at_producer); |
4d315a07 | 1922 | } |
35f5886e FF |
1923 | numutypes = (enddie - thisdie) / 4; |
1924 | utypes = (struct type **) xmalloc (numutypes * sizeof (struct type *)); | |
1925 | back_to = make_cleanup (free, utypes); | |
4ed3a9ea | 1926 | memset (utypes, 0, numutypes * sizeof (struct type *)); |
bf229b4e | 1927 | memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *)); |
d4902ab0 | 1928 | start_symtab (dip -> at_name, dip -> at_comp_dir, dip -> at_low_pc); |
35f5886e | 1929 | decode_line_numbers (lnbase); |
13b5a7ff | 1930 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
3c02636b JK |
1931 | |
1932 | symtab = end_symtab (dip -> at_high_pc, 0, 0, objfile, 0); | |
7b5d9650 | 1933 | if (symtab != NULL) |
4d315a07 | 1934 | { |
95ff889e | 1935 | symtab -> language = cu_language; |
7b5d9650 | 1936 | } |
35f5886e FF |
1937 | do_cleanups (back_to); |
1938 | utypes = NULL; | |
1939 | numutypes = 0; | |
1940 | } | |
1941 | ||
1942 | /* | |
1943 | ||
35f5886e FF |
1944 | LOCAL FUNCTION |
1945 | ||
1946 | process_dies -- process a range of DWARF Information Entries | |
1947 | ||
1948 | SYNOPSIS | |
1949 | ||
8b5b6fae FF |
1950 | static void process_dies (char *thisdie, char *enddie, |
1951 | struct objfile *objfile) | |
35f5886e FF |
1952 | |
1953 | DESCRIPTION | |
1954 | ||
1955 | Process all DIE's in a specified range. May be (and almost | |
1956 | certainly will be) called recursively. | |
1957 | */ | |
1958 | ||
1959 | static void | |
1ab3bf1b JG |
1960 | process_dies (thisdie, enddie, objfile) |
1961 | char *thisdie; | |
1962 | char *enddie; | |
1963 | struct objfile *objfile; | |
35f5886e FF |
1964 | { |
1965 | char *nextdie; | |
1966 | struct dieinfo di; | |
1967 | ||
1968 | while (thisdie < enddie) | |
1969 | { | |
95967e73 | 1970 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 1971 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
1972 | { |
1973 | break; | |
1974 | } | |
13b5a7ff | 1975 | else if (di.die_tag == TAG_padding) |
35f5886e | 1976 | { |
13b5a7ff | 1977 | nextdie = thisdie + di.die_length; |
35f5886e FF |
1978 | } |
1979 | else | |
1980 | { | |
95967e73 | 1981 | completedieinfo (&di, objfile); |
35f5886e FF |
1982 | if (di.at_sibling != 0) |
1983 | { | |
1984 | nextdie = dbbase + di.at_sibling - dbroff; | |
1985 | } | |
1986 | else | |
1987 | { | |
13b5a7ff | 1988 | nextdie = thisdie + di.die_length; |
35f5886e | 1989 | } |
13b5a7ff | 1990 | switch (di.die_tag) |
35f5886e FF |
1991 | { |
1992 | case TAG_compile_unit: | |
a048c8f5 | 1993 | read_file_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
1994 | break; |
1995 | case TAG_global_subroutine: | |
1996 | case TAG_subroutine: | |
2d6186f4 | 1997 | if (di.has_at_low_pc) |
35f5886e | 1998 | { |
a048c8f5 | 1999 | read_func_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2000 | } |
2001 | break; | |
2002 | case TAG_lexical_block: | |
a048c8f5 | 2003 | read_lexical_block_scope (&di, thisdie, nextdie, objfile); |
35f5886e | 2004 | break; |
95ff889e | 2005 | case TAG_class_type: |
35f5886e FF |
2006 | case TAG_structure_type: |
2007 | case TAG_union_type: | |
8b5b6fae | 2008 | read_structure_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2009 | break; |
2010 | case TAG_enumeration_type: | |
1ab3bf1b | 2011 | read_enumeration (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2012 | break; |
2013 | case TAG_subroutine_type: | |
2014 | read_subroutine_type (&di, thisdie, nextdie); | |
2015 | break; | |
2016 | case TAG_array_type: | |
4d315a07 | 2017 | dwarf_read_array_type (&di); |
35f5886e | 2018 | break; |
9e4c1921 FF |
2019 | case TAG_pointer_type: |
2020 | read_tag_pointer_type (&di); | |
2021 | break; | |
ec16f701 FF |
2022 | case TAG_string_type: |
2023 | read_tag_string_type (&di); | |
2024 | break; | |
35f5886e | 2025 | default: |
4ed3a9ea | 2026 | new_symbol (&di, objfile); |
35f5886e FF |
2027 | break; |
2028 | } | |
2029 | } | |
2030 | thisdie = nextdie; | |
2031 | } | |
2032 | } | |
2033 | ||
2034 | /* | |
2035 | ||
35f5886e FF |
2036 | LOCAL FUNCTION |
2037 | ||
2038 | decode_line_numbers -- decode a line number table fragment | |
2039 | ||
2040 | SYNOPSIS | |
2041 | ||
2042 | static void decode_line_numbers (char *tblscan, char *tblend, | |
2043 | long length, long base, long line, long pc) | |
2044 | ||
2045 | DESCRIPTION | |
2046 | ||
2047 | Translate the DWARF line number information to gdb form. | |
2048 | ||
2049 | The ".line" section contains one or more line number tables, one for | |
2050 | each ".line" section from the objects that were linked. | |
2051 | ||
2052 | The AT_stmt_list attribute for each TAG_source_file entry in the | |
2053 | ".debug" section contains the offset into the ".line" section for the | |
2054 | start of the table for that file. | |
2055 | ||
2056 | The table itself has the following structure: | |
2057 | ||
2058 | <table length><base address><source statement entry> | |
2059 | 4 bytes 4 bytes 10 bytes | |
2060 | ||
2061 | The table length is the total size of the table, including the 4 bytes | |
2062 | for the length information. | |
2063 | ||
2064 | The base address is the address of the first instruction generated | |
2065 | for the source file. | |
2066 | ||
2067 | Each source statement entry has the following structure: | |
2068 | ||
2069 | <line number><statement position><address delta> | |
2070 | 4 bytes 2 bytes 4 bytes | |
2071 | ||
2072 | The line number is relative to the start of the file, starting with | |
2073 | line 1. | |
2074 | ||
2075 | The statement position either -1 (0xFFFF) or the number of characters | |
2076 | from the beginning of the line to the beginning of the statement. | |
2077 | ||
2078 | The address delta is the difference between the base address and | |
2079 | the address of the first instruction for the statement. | |
2080 | ||
2081 | Note that we must copy the bytes from the packed table to our local | |
2082 | variables before attempting to use them, to avoid alignment problems | |
2083 | on some machines, particularly RISC processors. | |
2084 | ||
2085 | BUGS | |
2086 | ||
2087 | Does gdb expect the line numbers to be sorted? They are now by | |
2088 | chance/luck, but are not required to be. (FIXME) | |
2089 | ||
2090 | The line with number 0 is unused, gdb apparently can discover the | |
2091 | span of the last line some other way. How? (FIXME) | |
2092 | */ | |
2093 | ||
2094 | static void | |
1ab3bf1b JG |
2095 | decode_line_numbers (linetable) |
2096 | char *linetable; | |
35f5886e FF |
2097 | { |
2098 | char *tblscan; | |
2099 | char *tblend; | |
13b5a7ff FF |
2100 | unsigned long length; |
2101 | unsigned long base; | |
2102 | unsigned long line; | |
2103 | unsigned long pc; | |
35f5886e FF |
2104 | |
2105 | if (linetable != NULL) | |
2106 | { | |
2107 | tblscan = tblend = linetable; | |
13b5a7ff FF |
2108 | length = target_to_host (tblscan, SIZEOF_LINETBL_LENGTH, GET_UNSIGNED, |
2109 | current_objfile); | |
2110 | tblscan += SIZEOF_LINETBL_LENGTH; | |
35f5886e | 2111 | tblend += length; |
13b5a7ff FF |
2112 | base = target_to_host (tblscan, TARGET_FT_POINTER_SIZE (objfile), |
2113 | GET_UNSIGNED, current_objfile); | |
2114 | tblscan += TARGET_FT_POINTER_SIZE (objfile); | |
35f5886e | 2115 | base += baseaddr; |
35f5886e FF |
2116 | while (tblscan < tblend) |
2117 | { | |
13b5a7ff FF |
2118 | line = target_to_host (tblscan, SIZEOF_LINETBL_LINENO, GET_UNSIGNED, |
2119 | current_objfile); | |
2120 | tblscan += SIZEOF_LINETBL_LINENO + SIZEOF_LINETBL_STMT; | |
2121 | pc = target_to_host (tblscan, SIZEOF_LINETBL_DELTA, GET_UNSIGNED, | |
2122 | current_objfile); | |
2123 | tblscan += SIZEOF_LINETBL_DELTA; | |
35f5886e | 2124 | pc += base; |
13b5a7ff | 2125 | if (line != 0) |
35f5886e | 2126 | { |
4d315a07 | 2127 | record_line (current_subfile, line, pc); |
35f5886e FF |
2128 | } |
2129 | } | |
2130 | } | |
2131 | } | |
2132 | ||
2133 | /* | |
2134 | ||
35f5886e FF |
2135 | LOCAL FUNCTION |
2136 | ||
2137 | locval -- compute the value of a location attribute | |
2138 | ||
2139 | SYNOPSIS | |
2140 | ||
2141 | static int locval (char *loc) | |
2142 | ||
2143 | DESCRIPTION | |
2144 | ||
2145 | Given pointer to a string of bytes that define a location, compute | |
2146 | the location and return the value. | |
2147 | ||
2148 | When computing values involving the current value of the frame pointer, | |
2149 | the value zero is used, which results in a value relative to the frame | |
2150 | pointer, rather than the absolute value. This is what GDB wants | |
2151 | anyway. | |
2152 | ||
2153 | When the result is a register number, the global isreg flag is set, | |
2154 | otherwise it is cleared. This is a kludge until we figure out a better | |
2155 | way to handle the problem. Gdb's design does not mesh well with the | |
2156 | DWARF notion of a location computing interpreter, which is a shame | |
2157 | because the flexibility goes unused. | |
2158 | ||
2159 | NOTES | |
2160 | ||
2161 | Note that stack[0] is unused except as a default error return. | |
2162 | Note that stack overflow is not yet handled. | |
2163 | */ | |
2164 | ||
2165 | static int | |
1ab3bf1b JG |
2166 | locval (loc) |
2167 | char *loc; | |
35f5886e FF |
2168 | { |
2169 | unsigned short nbytes; | |
13b5a7ff FF |
2170 | unsigned short locsize; |
2171 | auto long stack[64]; | |
35f5886e FF |
2172 | int stacki; |
2173 | char *end; | |
13b5a7ff FF |
2174 | int loc_atom_code; |
2175 | int loc_value_size; | |
35f5886e | 2176 | |
13b5a7ff FF |
2177 | nbytes = attribute_size (AT_location); |
2178 | locsize = target_to_host (loc, nbytes, GET_UNSIGNED, current_objfile); | |
2179 | loc += nbytes; | |
2180 | end = loc + locsize; | |
35f5886e FF |
2181 | stacki = 0; |
2182 | stack[stacki] = 0; | |
2183 | isreg = 0; | |
a5bd5ba6 | 2184 | offreg = 0; |
13b5a7ff FF |
2185 | loc_value_size = TARGET_FT_LONG_SIZE (current_objfile); |
2186 | while (loc < end) | |
35f5886e | 2187 | { |
13b5a7ff FF |
2188 | loc_atom_code = target_to_host (loc, SIZEOF_LOC_ATOM_CODE, GET_UNSIGNED, |
2189 | current_objfile); | |
2190 | loc += SIZEOF_LOC_ATOM_CODE; | |
2191 | switch (loc_atom_code) | |
2192 | { | |
2193 | case 0: | |
2194 | /* error */ | |
2195 | loc = end; | |
2196 | break; | |
2197 | case OP_REG: | |
2198 | /* push register (number) */ | |
2199 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2200 | GET_UNSIGNED, current_objfile); | |
2201 | loc += loc_value_size; | |
2202 | isreg = 1; | |
2203 | break; | |
2204 | case OP_BASEREG: | |
2205 | /* push value of register (number) */ | |
a1c8d76e JK |
2206 | /* Actually, we compute the value as if register has 0, so the |
2207 | value ends up being the offset from that register. */ | |
13b5a7ff | 2208 | offreg = 1; |
a1c8d76e JK |
2209 | basereg = target_to_host (loc, loc_value_size, GET_UNSIGNED, |
2210 | current_objfile); | |
13b5a7ff | 2211 | loc += loc_value_size; |
a1c8d76e | 2212 | stack[++stacki] = 0; |
13b5a7ff FF |
2213 | break; |
2214 | case OP_ADDR: | |
2215 | /* push address (relocated address) */ | |
2216 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2217 | GET_UNSIGNED, current_objfile); | |
2218 | loc += loc_value_size; | |
2219 | break; | |
2220 | case OP_CONST: | |
2221 | /* push constant (number) FIXME: signed or unsigned! */ | |
2222 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2223 | GET_SIGNED, current_objfile); | |
2224 | loc += loc_value_size; | |
2225 | break; | |
2226 | case OP_DEREF2: | |
2227 | /* pop, deref and push 2 bytes (as a long) */ | |
51b80b00 | 2228 | complain (&op_deref2, DIE_ID, DIE_NAME, stack[stacki]); |
13b5a7ff FF |
2229 | break; |
2230 | case OP_DEREF4: /* pop, deref and push 4 bytes (as a long) */ | |
51b80b00 | 2231 | complain (&op_deref4, DIE_ID, DIE_NAME, stack[stacki]); |
13b5a7ff FF |
2232 | break; |
2233 | case OP_ADD: /* pop top 2 items, add, push result */ | |
2234 | stack[stacki - 1] += stack[stacki]; | |
2235 | stacki--; | |
2236 | break; | |
2237 | } | |
35f5886e FF |
2238 | } |
2239 | return (stack[stacki]); | |
2240 | } | |
2241 | ||
2242 | /* | |
2243 | ||
2244 | LOCAL FUNCTION | |
2245 | ||
2246 | read_ofile_symtab -- build a full symtab entry from chunk of DIE's | |
2247 | ||
2248 | SYNOPSIS | |
2249 | ||
c701c14c | 2250 | static void read_ofile_symtab (struct partial_symtab *pst) |
35f5886e FF |
2251 | |
2252 | DESCRIPTION | |
2253 | ||
1ab3bf1b JG |
2254 | When expanding a partial symbol table entry to a full symbol table |
2255 | entry, this is the function that gets called to read in the symbols | |
c701c14c FF |
2256 | for the compilation unit. A pointer to the newly constructed symtab, |
2257 | which is now the new first one on the objfile's symtab list, is | |
2258 | stashed in the partial symbol table entry. | |
35f5886e FF |
2259 | */ |
2260 | ||
c701c14c | 2261 | static void |
1ab3bf1b JG |
2262 | read_ofile_symtab (pst) |
2263 | struct partial_symtab *pst; | |
35f5886e FF |
2264 | { |
2265 | struct cleanup *back_to; | |
13b5a7ff | 2266 | unsigned long lnsize; |
d5931d79 | 2267 | file_ptr foffset; |
1ab3bf1b | 2268 | bfd *abfd; |
13b5a7ff | 2269 | char lnsizedata[SIZEOF_LINETBL_LENGTH]; |
1ab3bf1b JG |
2270 | |
2271 | abfd = pst -> objfile -> obfd; | |
2272 | current_objfile = pst -> objfile; | |
2273 | ||
35f5886e FF |
2274 | /* Allocate a buffer for the entire chunk of DIE's for this compilation |
2275 | unit, seek to the location in the file, and read in all the DIE's. */ | |
2276 | ||
2277 | diecount = 0; | |
4090fe1c FF |
2278 | dbsize = DBLENGTH (pst); |
2279 | dbbase = xmalloc (dbsize); | |
35f5886e FF |
2280 | dbroff = DBROFF(pst); |
2281 | foffset = DBFOFF(pst) + dbroff; | |
2670f34d JG |
2282 | base_section_offsets = pst->section_offsets; |
2283 | baseaddr = ANOFFSET (pst->section_offsets, 0); | |
d5931d79 | 2284 | if (bfd_seek (abfd, foffset, L_SET) || |
4090fe1c | 2285 | (bfd_read (dbbase, dbsize, 1, abfd) != dbsize)) |
35f5886e FF |
2286 | { |
2287 | free (dbbase); | |
2288 | error ("can't read DWARF data"); | |
2289 | } | |
2290 | back_to = make_cleanup (free, dbbase); | |
2291 | ||
2292 | /* If there is a line number table associated with this compilation unit | |
13b5a7ff FF |
2293 | then read the size of this fragment in bytes, from the fragment itself. |
2294 | Allocate a buffer for the fragment and read it in for future | |
35f5886e FF |
2295 | processing. */ |
2296 | ||
2297 | lnbase = NULL; | |
2298 | if (LNFOFF (pst)) | |
2299 | { | |
d5931d79 | 2300 | if (bfd_seek (abfd, LNFOFF (pst), L_SET) || |
13b5a7ff FF |
2301 | (bfd_read ((PTR) lnsizedata, sizeof (lnsizedata), 1, abfd) != |
2302 | sizeof (lnsizedata))) | |
35f5886e FF |
2303 | { |
2304 | error ("can't read DWARF line number table size"); | |
2305 | } | |
13b5a7ff FF |
2306 | lnsize = target_to_host (lnsizedata, SIZEOF_LINETBL_LENGTH, |
2307 | GET_UNSIGNED, pst -> objfile); | |
35f5886e | 2308 | lnbase = xmalloc (lnsize); |
d5931d79 | 2309 | if (bfd_seek (abfd, LNFOFF (pst), L_SET) || |
a048c8f5 | 2310 | (bfd_read (lnbase, lnsize, 1, abfd) != lnsize)) |
35f5886e FF |
2311 | { |
2312 | free (lnbase); | |
2313 | error ("can't read DWARF line numbers"); | |
2314 | } | |
2315 | make_cleanup (free, lnbase); | |
2316 | } | |
2317 | ||
4090fe1c | 2318 | process_dies (dbbase, dbbase + dbsize, pst -> objfile); |
35f5886e | 2319 | do_cleanups (back_to); |
1ab3bf1b | 2320 | current_objfile = NULL; |
c701c14c | 2321 | pst -> symtab = pst -> objfile -> symtabs; |
35f5886e FF |
2322 | } |
2323 | ||
2324 | /* | |
2325 | ||
2326 | LOCAL FUNCTION | |
2327 | ||
2328 | psymtab_to_symtab_1 -- do grunt work for building a full symtab entry | |
2329 | ||
2330 | SYNOPSIS | |
2331 | ||
a048c8f5 | 2332 | static void psymtab_to_symtab_1 (struct partial_symtab *pst) |
35f5886e FF |
2333 | |
2334 | DESCRIPTION | |
2335 | ||
2336 | Called once for each partial symbol table entry that needs to be | |
2337 | expanded into a full symbol table entry. | |
2338 | ||
2339 | */ | |
2340 | ||
2341 | static void | |
1ab3bf1b JG |
2342 | psymtab_to_symtab_1 (pst) |
2343 | struct partial_symtab *pst; | |
35f5886e FF |
2344 | { |
2345 | int i; | |
d07734e3 | 2346 | struct cleanup *old_chain; |
35f5886e | 2347 | |
1ab3bf1b | 2348 | if (pst != NULL) |
35f5886e | 2349 | { |
1ab3bf1b | 2350 | if (pst->readin) |
35f5886e | 2351 | { |
318bf84f | 2352 | warning ("psymtab for %s already read in. Shouldn't happen.", |
1ab3bf1b JG |
2353 | pst -> filename); |
2354 | } | |
2355 | else | |
2356 | { | |
2357 | /* Read in all partial symtabs on which this one is dependent */ | |
2358 | for (i = 0; i < pst -> number_of_dependencies; i++) | |
2359 | { | |
2360 | if (!pst -> dependencies[i] -> readin) | |
2361 | { | |
2362 | /* Inform about additional files that need to be read in. */ | |
2363 | if (info_verbose) | |
2364 | { | |
2365 | fputs_filtered (" ", stdout); | |
2366 | wrap_here (""); | |
2367 | fputs_filtered ("and ", stdout); | |
2368 | wrap_here (""); | |
2369 | printf_filtered ("%s...", | |
2370 | pst -> dependencies[i] -> filename); | |
2371 | wrap_here (""); | |
2372 | fflush (stdout); /* Flush output */ | |
2373 | } | |
2374 | psymtab_to_symtab_1 (pst -> dependencies[i]); | |
2375 | } | |
2376 | } | |
2377 | if (DBLENGTH (pst)) /* Otherwise it's a dummy */ | |
2378 | { | |
d07734e3 FF |
2379 | buildsym_init (); |
2380 | old_chain = make_cleanup (really_free_pendings, 0); | |
c701c14c | 2381 | read_ofile_symtab (pst); |
1ab3bf1b JG |
2382 | if (info_verbose) |
2383 | { | |
2384 | printf_filtered ("%d DIE's, sorting...", diecount); | |
2385 | wrap_here (""); | |
2386 | fflush (stdout); | |
2387 | } | |
2388 | sort_symtab_syms (pst -> symtab); | |
d07734e3 | 2389 | do_cleanups (old_chain); |
1ab3bf1b JG |
2390 | } |
2391 | pst -> readin = 1; | |
35f5886e | 2392 | } |
35f5886e | 2393 | } |
35f5886e FF |
2394 | } |
2395 | ||
2396 | /* | |
2397 | ||
2398 | LOCAL FUNCTION | |
2399 | ||
2400 | dwarf_psymtab_to_symtab -- build a full symtab entry from partial one | |
2401 | ||
2402 | SYNOPSIS | |
2403 | ||
2404 | static void dwarf_psymtab_to_symtab (struct partial_symtab *pst) | |
2405 | ||
2406 | DESCRIPTION | |
2407 | ||
2408 | This is the DWARF support entry point for building a full symbol | |
2409 | table entry from a partial symbol table entry. We are passed a | |
2410 | pointer to the partial symbol table entry that needs to be expanded. | |
2411 | ||
2412 | */ | |
2413 | ||
2414 | static void | |
1ab3bf1b JG |
2415 | dwarf_psymtab_to_symtab (pst) |
2416 | struct partial_symtab *pst; | |
35f5886e | 2417 | { |
7d9884b9 | 2418 | |
1ab3bf1b | 2419 | if (pst != NULL) |
35f5886e | 2420 | { |
1ab3bf1b | 2421 | if (pst -> readin) |
35f5886e | 2422 | { |
318bf84f | 2423 | warning ("psymtab for %s already read in. Shouldn't happen.", |
1ab3bf1b | 2424 | pst -> filename); |
35f5886e | 2425 | } |
1ab3bf1b | 2426 | else |
35f5886e | 2427 | { |
1ab3bf1b JG |
2428 | if (DBLENGTH (pst) || pst -> number_of_dependencies) |
2429 | { | |
2430 | /* Print the message now, before starting serious work, to avoid | |
2431 | disconcerting pauses. */ | |
2432 | if (info_verbose) | |
2433 | { | |
2434 | printf_filtered ("Reading in symbols for %s...", | |
2435 | pst -> filename); | |
2436 | fflush (stdout); | |
2437 | } | |
2438 | ||
2439 | psymtab_to_symtab_1 (pst); | |
2440 | ||
2441 | #if 0 /* FIXME: Check to see what dbxread is doing here and see if | |
2442 | we need to do an equivalent or is this something peculiar to | |
2443 | stabs/a.out format. | |
2444 | Match with global symbols. This only needs to be done once, | |
2445 | after all of the symtabs and dependencies have been read in. | |
2446 | */ | |
2447 | scan_file_globals (pst -> objfile); | |
2448 | #endif | |
2449 | ||
2450 | /* Finish up the verbose info message. */ | |
2451 | if (info_verbose) | |
2452 | { | |
2453 | printf_filtered ("done.\n"); | |
2454 | fflush (stdout); | |
2455 | } | |
2456 | } | |
35f5886e FF |
2457 | } |
2458 | } | |
2459 | } | |
2460 | ||
2461 | /* | |
2462 | ||
2463 | LOCAL FUNCTION | |
2464 | ||
2465 | init_psymbol_list -- initialize storage for partial symbols | |
2466 | ||
2467 | SYNOPSIS | |
2468 | ||
1ab3bf1b | 2469 | static void init_psymbol_list (struct objfile *objfile, int total_symbols) |
35f5886e FF |
2470 | |
2471 | DESCRIPTION | |
2472 | ||
2473 | Initializes storage for all of the partial symbols that will be | |
2474 | created by dwarf_build_psymtabs and subsidiaries. | |
2475 | */ | |
2476 | ||
2477 | static void | |
1ab3bf1b JG |
2478 | init_psymbol_list (objfile, total_symbols) |
2479 | struct objfile *objfile; | |
2480 | int total_symbols; | |
35f5886e FF |
2481 | { |
2482 | /* Free any previously allocated psymbol lists. */ | |
2483 | ||
1ab3bf1b | 2484 | if (objfile -> global_psymbols.list) |
35f5886e | 2485 | { |
84ffdec2 | 2486 | mfree (objfile -> md, (PTR)objfile -> global_psymbols.list); |
35f5886e | 2487 | } |
1ab3bf1b | 2488 | if (objfile -> static_psymbols.list) |
35f5886e | 2489 | { |
84ffdec2 | 2490 | mfree (objfile -> md, (PTR)objfile -> static_psymbols.list); |
35f5886e FF |
2491 | } |
2492 | ||
2493 | /* Current best guess is that there are approximately a twentieth | |
2494 | of the total symbols (in a debugging file) are global or static | |
2495 | oriented symbols */ | |
2496 | ||
1ab3bf1b JG |
2497 | objfile -> global_psymbols.size = total_symbols / 10; |
2498 | objfile -> static_psymbols.size = total_symbols / 10; | |
2499 | objfile -> global_psymbols.next = | |
2500 | objfile -> global_psymbols.list = (struct partial_symbol *) | |
318bf84f | 2501 | xmmalloc (objfile -> md, objfile -> global_psymbols.size |
1ab3bf1b JG |
2502 | * sizeof (struct partial_symbol)); |
2503 | objfile -> static_psymbols.next = | |
2504 | objfile -> static_psymbols.list = (struct partial_symbol *) | |
318bf84f | 2505 | xmmalloc (objfile -> md, objfile -> static_psymbols.size |
1ab3bf1b | 2506 | * sizeof (struct partial_symbol)); |
35f5886e FF |
2507 | } |
2508 | ||
35f5886e FF |
2509 | /* |
2510 | ||
715cafcb FF |
2511 | LOCAL FUNCTION |
2512 | ||
2513 | add_enum_psymbol -- add enumeration members to partial symbol table | |
2514 | ||
2515 | DESCRIPTION | |
2516 | ||
2517 | Given pointer to a DIE that is known to be for an enumeration, | |
2518 | extract the symbolic names of the enumeration members and add | |
2519 | partial symbols for them. | |
2520 | */ | |
2521 | ||
2522 | static void | |
1ab3bf1b JG |
2523 | add_enum_psymbol (dip, objfile) |
2524 | struct dieinfo *dip; | |
2525 | struct objfile *objfile; | |
715cafcb FF |
2526 | { |
2527 | char *scan; | |
2528 | char *listend; | |
13b5a7ff FF |
2529 | unsigned short blocksz; |
2530 | int nbytes; | |
715cafcb FF |
2531 | |
2532 | if ((scan = dip -> at_element_list) != NULL) | |
2533 | { | |
2534 | if (dip -> short_element_list) | |
2535 | { | |
13b5a7ff | 2536 | nbytes = attribute_size (AT_short_element_list); |
715cafcb FF |
2537 | } |
2538 | else | |
2539 | { | |
13b5a7ff | 2540 | nbytes = attribute_size (AT_element_list); |
715cafcb | 2541 | } |
13b5a7ff FF |
2542 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); |
2543 | scan += nbytes; | |
2544 | listend = scan + blocksz; | |
715cafcb FF |
2545 | while (scan < listend) |
2546 | { | |
13b5a7ff | 2547 | scan += TARGET_FT_LONG_SIZE (objfile); |
b440b1e9 | 2548 | ADD_PSYMBOL_TO_LIST (scan, strlen (scan), VAR_NAMESPACE, LOC_CONST, |
2e4964ad FF |
2549 | objfile -> static_psymbols, 0, cu_language, |
2550 | objfile); | |
715cafcb FF |
2551 | scan += strlen (scan) + 1; |
2552 | } | |
2553 | } | |
2554 | } | |
2555 | ||
2556 | /* | |
2557 | ||
35f5886e FF |
2558 | LOCAL FUNCTION |
2559 | ||
2560 | add_partial_symbol -- add symbol to partial symbol table | |
2561 | ||
2562 | DESCRIPTION | |
2563 | ||
2564 | Given a DIE, if it is one of the types that we want to | |
2565 | add to a partial symbol table, finish filling in the die info | |
2566 | and then add a partial symbol table entry for it. | |
2567 | ||
95ff889e FF |
2568 | NOTES |
2569 | ||
2570 | The caller must ensure that the DIE has a valid name attribute. | |
35f5886e FF |
2571 | */ |
2572 | ||
2573 | static void | |
1ab3bf1b JG |
2574 | add_partial_symbol (dip, objfile) |
2575 | struct dieinfo *dip; | |
2576 | struct objfile *objfile; | |
35f5886e | 2577 | { |
13b5a7ff | 2578 | switch (dip -> die_tag) |
35f5886e FF |
2579 | { |
2580 | case TAG_global_subroutine: | |
b440b1e9 | 2581 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2582 | VAR_NAMESPACE, LOC_BLOCK, |
2583 | objfile -> global_psymbols, | |
2e4964ad | 2584 | dip -> at_low_pc, cu_language, objfile); |
35f5886e FF |
2585 | break; |
2586 | case TAG_global_variable: | |
b440b1e9 | 2587 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2588 | VAR_NAMESPACE, LOC_STATIC, |
2589 | objfile -> global_psymbols, | |
2e4964ad | 2590 | 0, cu_language, objfile); |
35f5886e FF |
2591 | break; |
2592 | case TAG_subroutine: | |
b440b1e9 | 2593 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2594 | VAR_NAMESPACE, LOC_BLOCK, |
2595 | objfile -> static_psymbols, | |
2e4964ad | 2596 | dip -> at_low_pc, cu_language, objfile); |
35f5886e FF |
2597 | break; |
2598 | case TAG_local_variable: | |
b440b1e9 | 2599 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2600 | VAR_NAMESPACE, LOC_STATIC, |
2601 | objfile -> static_psymbols, | |
2e4964ad | 2602 | 0, cu_language, objfile); |
35f5886e FF |
2603 | break; |
2604 | case TAG_typedef: | |
b440b1e9 | 2605 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2606 | VAR_NAMESPACE, LOC_TYPEDEF, |
2607 | objfile -> static_psymbols, | |
2e4964ad | 2608 | 0, cu_language, objfile); |
35f5886e | 2609 | break; |
95ff889e | 2610 | case TAG_class_type: |
35f5886e FF |
2611 | case TAG_structure_type: |
2612 | case TAG_union_type: | |
95ff889e | 2613 | case TAG_enumeration_type: |
b440b1e9 | 2614 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2615 | STRUCT_NAMESPACE, LOC_TYPEDEF, |
2616 | objfile -> static_psymbols, | |
2e4964ad | 2617 | 0, cu_language, objfile); |
95ff889e | 2618 | if (cu_language == language_cplus) |
715cafcb | 2619 | { |
95ff889e | 2620 | /* For C++, these implicitly act as typedefs as well. */ |
b440b1e9 | 2621 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
95ff889e | 2622 | VAR_NAMESPACE, LOC_TYPEDEF, |
1ab3bf1b | 2623 | objfile -> static_psymbols, |
2e4964ad | 2624 | 0, cu_language, objfile); |
715cafcb | 2625 | } |
715cafcb | 2626 | break; |
35f5886e FF |
2627 | } |
2628 | } | |
2629 | ||
2630 | /* | |
2631 | ||
2632 | LOCAL FUNCTION | |
2633 | ||
2634 | scan_partial_symbols -- scan DIE's within a single compilation unit | |
2635 | ||
2636 | DESCRIPTION | |
2637 | ||
2638 | Process the DIE's within a single compilation unit, looking for | |
2639 | interesting DIE's that contribute to the partial symbol table entry | |
a679650f | 2640 | for this compilation unit. |
35f5886e | 2641 | |
2d6186f4 FF |
2642 | NOTES |
2643 | ||
a679650f FF |
2644 | There are some DIE's that may appear both at file scope and within |
2645 | the scope of a function. We are only interested in the ones at file | |
2646 | scope, and the only way to tell them apart is to keep track of the | |
2647 | scope. For example, consider the test case: | |
2648 | ||
2649 | static int i; | |
2650 | main () { int j; } | |
2651 | ||
2652 | for which the relevant DWARF segment has the structure: | |
2653 | ||
2654 | 0x51: | |
2655 | 0x23 global subrtn sibling 0x9b | |
2656 | name main | |
2657 | fund_type FT_integer | |
2658 | low_pc 0x800004cc | |
2659 | high_pc 0x800004d4 | |
2660 | ||
2661 | 0x74: | |
2662 | 0x23 local var sibling 0x97 | |
2663 | name j | |
2664 | fund_type FT_integer | |
2665 | location OP_BASEREG 0xe | |
2666 | OP_CONST 0xfffffffc | |
2667 | OP_ADD | |
2668 | 0x97: | |
2669 | 0x4 | |
2670 | ||
2671 | 0x9b: | |
2672 | 0x1d local var sibling 0xb8 | |
2673 | name i | |
2674 | fund_type FT_integer | |
2675 | location OP_ADDR 0x800025dc | |
2676 | ||
2677 | 0xb8: | |
2678 | 0x4 | |
2679 | ||
2680 | We want to include the symbol 'i' in the partial symbol table, but | |
2681 | not the symbol 'j'. In essence, we want to skip all the dies within | |
2682 | the scope of a TAG_global_subroutine DIE. | |
2683 | ||
715cafcb FF |
2684 | Don't attempt to add anonymous structures or unions since they have |
2685 | no name. Anonymous enumerations however are processed, because we | |
2686 | want to extract their member names (the check for a tag name is | |
2687 | done later). | |
2d6186f4 | 2688 | |
715cafcb FF |
2689 | Also, for variables and subroutines, check that this is the place |
2690 | where the actual definition occurs, rather than just a reference | |
2691 | to an external. | |
35f5886e FF |
2692 | */ |
2693 | ||
2694 | static void | |
1ab3bf1b JG |
2695 | scan_partial_symbols (thisdie, enddie, objfile) |
2696 | char *thisdie; | |
2697 | char *enddie; | |
2698 | struct objfile *objfile; | |
35f5886e FF |
2699 | { |
2700 | char *nextdie; | |
a679650f | 2701 | char *temp; |
35f5886e FF |
2702 | struct dieinfo di; |
2703 | ||
2704 | while (thisdie < enddie) | |
2705 | { | |
95967e73 | 2706 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2707 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2708 | { |
2709 | break; | |
2710 | } | |
2711 | else | |
2712 | { | |
13b5a7ff | 2713 | nextdie = thisdie + di.die_length; |
715cafcb FF |
2714 | /* To avoid getting complete die information for every die, we |
2715 | only do it (below) for the cases we are interested in. */ | |
13b5a7ff | 2716 | switch (di.die_tag) |
35f5886e FF |
2717 | { |
2718 | case TAG_global_subroutine: | |
35f5886e | 2719 | case TAG_subroutine: |
a679650f FF |
2720 | completedieinfo (&di, objfile); |
2721 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2722 | { | |
2723 | add_partial_symbol (&di, objfile); | |
2724 | /* If there is a sibling attribute, adjust the nextdie | |
2725 | pointer to skip the entire scope of the subroutine. | |
2726 | Apply some sanity checking to make sure we don't | |
2727 | overrun or underrun the range of remaining DIE's */ | |
2728 | if (di.at_sibling != 0) | |
2729 | { | |
2730 | temp = dbbase + di.at_sibling - dbroff; | |
2731 | if ((temp < thisdie) || (temp >= enddie)) | |
2732 | { | |
51b80b00 FF |
2733 | complain (&bad_die_ref, DIE_ID, DIE_NAME, |
2734 | di.at_sibling); | |
a679650f FF |
2735 | } |
2736 | else | |
2737 | { | |
2738 | nextdie = temp; | |
2739 | } | |
2740 | } | |
2741 | } | |
2742 | break; | |
2d6186f4 | 2743 | case TAG_global_variable: |
35f5886e | 2744 | case TAG_local_variable: |
95967e73 | 2745 | completedieinfo (&di, objfile); |
2d6186f4 FF |
2746 | if (di.at_name && (di.has_at_low_pc || di.at_location)) |
2747 | { | |
1ab3bf1b | 2748 | add_partial_symbol (&di, objfile); |
2d6186f4 FF |
2749 | } |
2750 | break; | |
35f5886e | 2751 | case TAG_typedef: |
95ff889e | 2752 | case TAG_class_type: |
35f5886e FF |
2753 | case TAG_structure_type: |
2754 | case TAG_union_type: | |
95967e73 | 2755 | completedieinfo (&di, objfile); |
2d6186f4 | 2756 | if (di.at_name) |
35f5886e | 2757 | { |
1ab3bf1b | 2758 | add_partial_symbol (&di, objfile); |
35f5886e FF |
2759 | } |
2760 | break; | |
715cafcb | 2761 | case TAG_enumeration_type: |
95967e73 | 2762 | completedieinfo (&di, objfile); |
95ff889e FF |
2763 | if (di.at_name) |
2764 | { | |
2765 | add_partial_symbol (&di, objfile); | |
2766 | } | |
2767 | add_enum_psymbol (&di, objfile); | |
715cafcb | 2768 | break; |
35f5886e FF |
2769 | } |
2770 | } | |
2771 | thisdie = nextdie; | |
2772 | } | |
2773 | } | |
2774 | ||
2775 | /* | |
2776 | ||
2777 | LOCAL FUNCTION | |
2778 | ||
2779 | scan_compilation_units -- build a psymtab entry for each compilation | |
2780 | ||
2781 | DESCRIPTION | |
2782 | ||
2783 | This is the top level dwarf parsing routine for building partial | |
2784 | symbol tables. | |
2785 | ||
2786 | It scans from the beginning of the DWARF table looking for the first | |
2787 | TAG_compile_unit DIE, and then follows the sibling chain to locate | |
2788 | each additional TAG_compile_unit DIE. | |
2789 | ||
2790 | For each TAG_compile_unit DIE it creates a partial symtab structure, | |
2791 | calls a subordinate routine to collect all the compilation unit's | |
2792 | global DIE's, file scope DIEs, typedef DIEs, etc, and then links the | |
2793 | new partial symtab structure into the partial symbol table. It also | |
2794 | records the appropriate information in the partial symbol table entry | |
2795 | to allow the chunk of DIE's and line number table for this compilation | |
2796 | unit to be located and re-read later, to generate a complete symbol | |
2797 | table entry for the compilation unit. | |
2798 | ||
2799 | Thus it effectively partitions up a chunk of DIE's for multiple | |
2800 | compilation units into smaller DIE chunks and line number tables, | |
2801 | and associates them with a partial symbol table entry. | |
2802 | ||
2803 | NOTES | |
2804 | ||
2805 | If any compilation unit has no line number table associated with | |
2806 | it for some reason (a missing at_stmt_list attribute, rather than | |
2807 | just one with a value of zero, which is valid) then we ensure that | |
2808 | the recorded file offset is zero so that the routine which later | |
2809 | reads line number table fragments knows that there is no fragment | |
2810 | to read. | |
2811 | ||
2812 | RETURNS | |
2813 | ||
2814 | Returns no value. | |
2815 | ||
2816 | */ | |
2817 | ||
2818 | static void | |
d5931d79 | 2819 | scan_compilation_units (thisdie, enddie, dbfoff, lnoffset, objfile) |
1ab3bf1b JG |
2820 | char *thisdie; |
2821 | char *enddie; | |
d5931d79 JG |
2822 | file_ptr dbfoff; |
2823 | file_ptr lnoffset; | |
1ab3bf1b | 2824 | struct objfile *objfile; |
35f5886e FF |
2825 | { |
2826 | char *nextdie; | |
2827 | struct dieinfo di; | |
2828 | struct partial_symtab *pst; | |
2829 | int culength; | |
2830 | int curoff; | |
d5931d79 | 2831 | file_ptr curlnoffset; |
35f5886e FF |
2832 | |
2833 | while (thisdie < enddie) | |
2834 | { | |
95967e73 | 2835 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2836 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2837 | { |
2838 | break; | |
2839 | } | |
13b5a7ff | 2840 | else if (di.die_tag != TAG_compile_unit) |
35f5886e | 2841 | { |
13b5a7ff | 2842 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2843 | } |
2844 | else | |
2845 | { | |
95967e73 | 2846 | completedieinfo (&di, objfile); |
95ff889e | 2847 | set_cu_language (&di); |
35f5886e FF |
2848 | if (di.at_sibling != 0) |
2849 | { | |
2850 | nextdie = dbbase + di.at_sibling - dbroff; | |
2851 | } | |
2852 | else | |
2853 | { | |
13b5a7ff | 2854 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2855 | } |
2856 | curoff = thisdie - dbbase; | |
2857 | culength = nextdie - thisdie; | |
2d6186f4 | 2858 | curlnoffset = di.has_at_stmt_list ? lnoffset + di.at_stmt_list : 0; |
1ab3bf1b JG |
2859 | |
2860 | /* First allocate a new partial symbol table structure */ | |
2861 | ||
95ff889e FF |
2862 | pst = start_psymtab_common (objfile, base_section_offsets, |
2863 | di.at_name, di.at_low_pc, | |
1ab3bf1b JG |
2864 | objfile -> global_psymbols.next, |
2865 | objfile -> static_psymbols.next); | |
2866 | ||
2867 | pst -> texthigh = di.at_high_pc; | |
2868 | pst -> read_symtab_private = (char *) | |
2869 | obstack_alloc (&objfile -> psymbol_obstack, | |
2870 | sizeof (struct dwfinfo)); | |
2871 | DBFOFF (pst) = dbfoff; | |
2872 | DBROFF (pst) = curoff; | |
2873 | DBLENGTH (pst) = culength; | |
2874 | LNFOFF (pst) = curlnoffset; | |
2875 | pst -> read_symtab = dwarf_psymtab_to_symtab; | |
2876 | ||
2877 | /* Now look for partial symbols */ | |
2878 | ||
13b5a7ff | 2879 | scan_partial_symbols (thisdie + di.die_length, nextdie, objfile); |
1ab3bf1b JG |
2880 | |
2881 | pst -> n_global_syms = objfile -> global_psymbols.next - | |
2882 | (objfile -> global_psymbols.list + pst -> globals_offset); | |
2883 | pst -> n_static_syms = objfile -> static_psymbols.next - | |
2884 | (objfile -> static_psymbols.list + pst -> statics_offset); | |
2885 | sort_pst_symbols (pst); | |
35f5886e FF |
2886 | /* If there is already a psymtab or symtab for a file of this name, |
2887 | remove it. (If there is a symtab, more drastic things also | |
2888 | happen.) This happens in VxWorks. */ | |
2889 | free_named_symtabs (pst -> filename); | |
35f5886e FF |
2890 | } |
2891 | thisdie = nextdie; | |
2892 | } | |
2893 | } | |
2894 | ||
2895 | /* | |
2896 | ||
2897 | LOCAL FUNCTION | |
2898 | ||
2899 | new_symbol -- make a symbol table entry for a new symbol | |
2900 | ||
2901 | SYNOPSIS | |
2902 | ||
1ab3bf1b JG |
2903 | static struct symbol *new_symbol (struct dieinfo *dip, |
2904 | struct objfile *objfile) | |
35f5886e FF |
2905 | |
2906 | DESCRIPTION | |
2907 | ||
2908 | Given a pointer to a DWARF information entry, figure out if we need | |
2909 | to make a symbol table entry for it, and if so, create a new entry | |
2910 | and return a pointer to it. | |
2911 | */ | |
2912 | ||
2913 | static struct symbol * | |
1ab3bf1b JG |
2914 | new_symbol (dip, objfile) |
2915 | struct dieinfo *dip; | |
2916 | struct objfile *objfile; | |
35f5886e FF |
2917 | { |
2918 | struct symbol *sym = NULL; | |
2919 | ||
2920 | if (dip -> at_name != NULL) | |
2921 | { | |
1ab3bf1b | 2922 | sym = (struct symbol *) obstack_alloc (&objfile -> symbol_obstack, |
35f5886e | 2923 | sizeof (struct symbol)); |
4ed3a9ea | 2924 | memset (sym, 0, sizeof (struct symbol)); |
95ff889e FF |
2925 | SYMBOL_NAME (sym) = create_name (dip -> at_name, |
2926 | &objfile->symbol_obstack); | |
35f5886e FF |
2927 | /* default assumptions */ |
2928 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2929 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2930 | SYMBOL_TYPE (sym) = decode_die_type (dip); | |
2e4964ad FF |
2931 | |
2932 | /* If this symbol is from a C++ compilation, then attempt to cache the | |
2933 | demangled form for future reference. This is a typical time versus | |
2934 | space tradeoff, that was decided in favor of time because it sped up | |
2935 | C++ symbol lookups by a factor of about 20. */ | |
2936 | ||
2937 | SYMBOL_LANGUAGE (sym) = cu_language; | |
7532cf10 | 2938 | SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile -> symbol_obstack); |
13b5a7ff | 2939 | switch (dip -> die_tag) |
35f5886e FF |
2940 | { |
2941 | case TAG_label: | |
4d315a07 | 2942 | SYMBOL_VALUE (sym) = dip -> at_low_pc; |
35f5886e FF |
2943 | SYMBOL_CLASS (sym) = LOC_LABEL; |
2944 | break; | |
2945 | case TAG_global_subroutine: | |
2946 | case TAG_subroutine: | |
4d315a07 | 2947 | SYMBOL_VALUE (sym) = dip -> at_low_pc; |
35f5886e FF |
2948 | SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym)); |
2949 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
13b5a7ff | 2950 | if (dip -> die_tag == TAG_global_subroutine) |
35f5886e FF |
2951 | { |
2952 | add_symbol_to_list (sym, &global_symbols); | |
2953 | } | |
2954 | else | |
2955 | { | |
4d315a07 | 2956 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2957 | } |
2958 | break; | |
2959 | case TAG_global_variable: | |
35f5886e FF |
2960 | if (dip -> at_location != NULL) |
2961 | { | |
2962 | SYMBOL_VALUE (sym) = locval (dip -> at_location); | |
35f5886e FF |
2963 | add_symbol_to_list (sym, &global_symbols); |
2964 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2965 | SYMBOL_VALUE (sym) += baseaddr; | |
2966 | } | |
a5bd5ba6 FF |
2967 | break; |
2968 | case TAG_local_variable: | |
2969 | if (dip -> at_location != NULL) | |
35f5886e | 2970 | { |
a5bd5ba6 | 2971 | SYMBOL_VALUE (sym) = locval (dip -> at_location); |
4d315a07 | 2972 | add_symbol_to_list (sym, list_in_scope); |
a5bd5ba6 FF |
2973 | if (isreg) |
2974 | { | |
2975 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
2976 | } | |
2977 | else if (offreg) | |
35f5886e | 2978 | { |
a1c8d76e JK |
2979 | SYMBOL_CLASS (sym) = LOC_BASEREG; |
2980 | SYMBOL_BASEREG (sym) = basereg; | |
35f5886e FF |
2981 | } |
2982 | else | |
2983 | { | |
2984 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2985 | SYMBOL_VALUE (sym) += baseaddr; | |
2986 | } | |
2987 | } | |
2988 | break; | |
2989 | case TAG_formal_parameter: | |
2990 | if (dip -> at_location != NULL) | |
2991 | { | |
2992 | SYMBOL_VALUE (sym) = locval (dip -> at_location); | |
2993 | } | |
4d315a07 | 2994 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2995 | if (isreg) |
2996 | { | |
2997 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
2998 | } | |
a1c8d76e JK |
2999 | else if (offreg) |
3000 | { | |
3001 | SYMBOL_CLASS (sym) = LOC_BASEREG_ARG; | |
3002 | SYMBOL_BASEREG (sym) = basereg; | |
3003 | } | |
35f5886e FF |
3004 | else |
3005 | { | |
3006 | SYMBOL_CLASS (sym) = LOC_ARG; | |
3007 | } | |
3008 | break; | |
3009 | case TAG_unspecified_parameters: | |
3010 | /* From varargs functions; gdb doesn't seem to have any interest in | |
3011 | this information, so just ignore it for now. (FIXME?) */ | |
3012 | break; | |
95ff889e | 3013 | case TAG_class_type: |
35f5886e FF |
3014 | case TAG_structure_type: |
3015 | case TAG_union_type: | |
3016 | case TAG_enumeration_type: | |
3017 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3018 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
4d315a07 | 3019 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
3020 | break; |
3021 | case TAG_typedef: | |
3022 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3023 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
4d315a07 | 3024 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
3025 | break; |
3026 | default: | |
3027 | /* Not a tag we recognize. Hopefully we aren't processing trash | |
3028 | data, but since we must specifically ignore things we don't | |
3029 | recognize, there is nothing else we should do at this point. */ | |
3030 | break; | |
3031 | } | |
3032 | } | |
3033 | return (sym); | |
3034 | } | |
3035 | ||
3036 | /* | |
3037 | ||
95ff889e FF |
3038 | LOCAL FUNCTION |
3039 | ||
3040 | synthesize_typedef -- make a symbol table entry for a "fake" typedef | |
3041 | ||
3042 | SYNOPSIS | |
3043 | ||
3044 | static void synthesize_typedef (struct dieinfo *dip, | |
3045 | struct objfile *objfile, | |
3046 | struct type *type); | |
3047 | ||
3048 | DESCRIPTION | |
3049 | ||
3050 | Given a pointer to a DWARF information entry, synthesize a typedef | |
3051 | for the name in the DIE, using the specified type. | |
3052 | ||
3053 | This is used for C++ class, structs, unions, and enumerations to | |
3054 | set up the tag name as a type. | |
3055 | ||
3056 | */ | |
3057 | ||
3058 | static void | |
3059 | synthesize_typedef (dip, objfile, type) | |
3060 | struct dieinfo *dip; | |
3061 | struct objfile *objfile; | |
3062 | struct type *type; | |
3063 | { | |
3064 | struct symbol *sym = NULL; | |
3065 | ||
3066 | if (dip -> at_name != NULL) | |
3067 | { | |
3068 | sym = (struct symbol *) | |
3069 | obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symbol)); | |
3070 | memset (sym, 0, sizeof (struct symbol)); | |
3071 | SYMBOL_NAME (sym) = create_name (dip -> at_name, | |
3072 | &objfile->symbol_obstack); | |
7532cf10 | 3073 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); |
95ff889e FF |
3074 | SYMBOL_TYPE (sym) = type; |
3075 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3076 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
3077 | add_symbol_to_list (sym, list_in_scope); | |
3078 | } | |
3079 | } | |
3080 | ||
3081 | /* | |
3082 | ||
35f5886e FF |
3083 | LOCAL FUNCTION |
3084 | ||
3085 | decode_mod_fund_type -- decode a modified fundamental type | |
3086 | ||
3087 | SYNOPSIS | |
3088 | ||
3089 | static struct type *decode_mod_fund_type (char *typedata) | |
3090 | ||
3091 | DESCRIPTION | |
3092 | ||
3093 | Decode a block of data containing a modified fundamental | |
3094 | type specification. TYPEDATA is a pointer to the block, | |
13b5a7ff FF |
3095 | which starts with a length containing the size of the rest |
3096 | of the block. At the end of the block is a fundmental type | |
3097 | code value that gives the fundamental type. Everything | |
35f5886e FF |
3098 | in between are type modifiers. |
3099 | ||
3100 | We simply compute the number of modifiers and call the general | |
3101 | function decode_modified_type to do the actual work. | |
3102 | */ | |
3103 | ||
3104 | static struct type * | |
1ab3bf1b JG |
3105 | decode_mod_fund_type (typedata) |
3106 | char *typedata; | |
35f5886e FF |
3107 | { |
3108 | struct type *typep = NULL; | |
3109 | unsigned short modcount; | |
13b5a7ff | 3110 | int nbytes; |
35f5886e FF |
3111 | |
3112 | /* Get the total size of the block, exclusive of the size itself */ | |
13b5a7ff FF |
3113 | |
3114 | nbytes = attribute_size (AT_mod_fund_type); | |
3115 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3116 | typedata += nbytes; | |
3117 | ||
35f5886e | 3118 | /* Deduct the size of the fundamental type bytes at the end of the block. */ |
13b5a7ff FF |
3119 | |
3120 | modcount -= attribute_size (AT_fund_type); | |
3121 | ||
35f5886e | 3122 | /* Now do the actual decoding */ |
13b5a7ff FF |
3123 | |
3124 | typep = decode_modified_type (typedata, modcount, AT_mod_fund_type); | |
35f5886e FF |
3125 | return (typep); |
3126 | } | |
3127 | ||
3128 | /* | |
3129 | ||
3130 | LOCAL FUNCTION | |
3131 | ||
3132 | decode_mod_u_d_type -- decode a modified user defined type | |
3133 | ||
3134 | SYNOPSIS | |
3135 | ||
3136 | static struct type *decode_mod_u_d_type (char *typedata) | |
3137 | ||
3138 | DESCRIPTION | |
3139 | ||
3140 | Decode a block of data containing a modified user defined | |
3141 | type specification. TYPEDATA is a pointer to the block, | |
3142 | which consists of a two byte length, containing the size | |
3143 | of the rest of the block. At the end of the block is a | |
3144 | four byte value that gives a reference to a user defined type. | |
3145 | Everything in between are type modifiers. | |
3146 | ||
3147 | We simply compute the number of modifiers and call the general | |
3148 | function decode_modified_type to do the actual work. | |
3149 | */ | |
3150 | ||
3151 | static struct type * | |
1ab3bf1b JG |
3152 | decode_mod_u_d_type (typedata) |
3153 | char *typedata; | |
35f5886e FF |
3154 | { |
3155 | struct type *typep = NULL; | |
3156 | unsigned short modcount; | |
13b5a7ff | 3157 | int nbytes; |
35f5886e FF |
3158 | |
3159 | /* Get the total size of the block, exclusive of the size itself */ | |
13b5a7ff FF |
3160 | |
3161 | nbytes = attribute_size (AT_mod_u_d_type); | |
3162 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3163 | typedata += nbytes; | |
3164 | ||
35f5886e | 3165 | /* Deduct the size of the reference type bytes at the end of the block. */ |
13b5a7ff FF |
3166 | |
3167 | modcount -= attribute_size (AT_user_def_type); | |
3168 | ||
35f5886e | 3169 | /* Now do the actual decoding */ |
13b5a7ff FF |
3170 | |
3171 | typep = decode_modified_type (typedata, modcount, AT_mod_u_d_type); | |
35f5886e FF |
3172 | return (typep); |
3173 | } | |
3174 | ||
3175 | /* | |
3176 | ||
3177 | LOCAL FUNCTION | |
3178 | ||
3179 | decode_modified_type -- decode modified user or fundamental type | |
3180 | ||
3181 | SYNOPSIS | |
3182 | ||
1c92ca6f | 3183 | static struct type *decode_modified_type (char *modifiers, |
35f5886e FF |
3184 | unsigned short modcount, int mtype) |
3185 | ||
3186 | DESCRIPTION | |
3187 | ||
3188 | Decode a modified type, either a modified fundamental type or | |
3189 | a modified user defined type. MODIFIERS is a pointer to the | |
3190 | block of bytes that define MODCOUNT modifiers. Immediately | |
3191 | following the last modifier is a short containing the fundamental | |
3192 | type or a long containing the reference to the user defined | |
3193 | type. Which one is determined by MTYPE, which is either | |
3194 | AT_mod_fund_type or AT_mod_u_d_type to indicate what modified | |
3195 | type we are generating. | |
3196 | ||
3197 | We call ourself recursively to generate each modified type,` | |
3198 | until MODCOUNT reaches zero, at which point we have consumed | |
3199 | all the modifiers and generate either the fundamental type or | |
3200 | user defined type. When the recursion unwinds, each modifier | |
3201 | is applied in turn to generate the full modified type. | |
3202 | ||
3203 | NOTES | |
3204 | ||
3205 | If we find a modifier that we don't recognize, and it is not one | |
3206 | of those reserved for application specific use, then we issue a | |
3207 | warning and simply ignore the modifier. | |
3208 | ||
3209 | BUGS | |
3210 | ||
3211 | We currently ignore MOD_const and MOD_volatile. (FIXME) | |
3212 | ||
3213 | */ | |
3214 | ||
3215 | static struct type * | |
1ab3bf1b | 3216 | decode_modified_type (modifiers, modcount, mtype) |
1c92ca6f | 3217 | char *modifiers; |
1ab3bf1b JG |
3218 | unsigned int modcount; |
3219 | int mtype; | |
35f5886e FF |
3220 | { |
3221 | struct type *typep = NULL; | |
3222 | unsigned short fundtype; | |
13b5a7ff | 3223 | DIE_REF die_ref; |
1c92ca6f | 3224 | char modifier; |
13b5a7ff | 3225 | int nbytes; |
35f5886e FF |
3226 | |
3227 | if (modcount == 0) | |
3228 | { | |
3229 | switch (mtype) | |
3230 | { | |
3231 | case AT_mod_fund_type: | |
13b5a7ff FF |
3232 | nbytes = attribute_size (AT_fund_type); |
3233 | fundtype = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3234 | current_objfile); | |
35f5886e FF |
3235 | typep = decode_fund_type (fundtype); |
3236 | break; | |
3237 | case AT_mod_u_d_type: | |
13b5a7ff FF |
3238 | nbytes = attribute_size (AT_user_def_type); |
3239 | die_ref = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3240 | current_objfile); | |
3241 | if ((typep = lookup_utype (die_ref)) == NULL) | |
35f5886e | 3242 | { |
13b5a7ff | 3243 | typep = alloc_utype (die_ref, NULL); |
35f5886e FF |
3244 | } |
3245 | break; | |
3246 | default: | |
51b80b00 | 3247 | complain (&botched_modified_type, DIE_ID, DIE_NAME, mtype); |
bf229b4e | 3248 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
35f5886e FF |
3249 | break; |
3250 | } | |
3251 | } | |
3252 | else | |
3253 | { | |
3254 | modifier = *modifiers++; | |
3255 | typep = decode_modified_type (modifiers, --modcount, mtype); | |
3256 | switch (modifier) | |
3257 | { | |
13b5a7ff FF |
3258 | case MOD_pointer_to: |
3259 | typep = lookup_pointer_type (typep); | |
3260 | break; | |
3261 | case MOD_reference_to: | |
3262 | typep = lookup_reference_type (typep); | |
3263 | break; | |
3264 | case MOD_const: | |
51b80b00 | 3265 | complain (&const_ignored, DIE_ID, DIE_NAME); /* FIXME */ |
13b5a7ff FF |
3266 | break; |
3267 | case MOD_volatile: | |
51b80b00 | 3268 | complain (&volatile_ignored, DIE_ID, DIE_NAME); /* FIXME */ |
13b5a7ff FF |
3269 | break; |
3270 | default: | |
1c92ca6f FF |
3271 | if (!(MOD_lo_user <= (unsigned char) modifier |
3272 | && (unsigned char) modifier <= MOD_hi_user)) | |
13b5a7ff | 3273 | { |
51b80b00 | 3274 | complain (&unknown_type_modifier, DIE_ID, DIE_NAME, modifier); |
13b5a7ff FF |
3275 | } |
3276 | break; | |
35f5886e FF |
3277 | } |
3278 | } | |
3279 | return (typep); | |
3280 | } | |
3281 | ||
3282 | /* | |
3283 | ||
3284 | LOCAL FUNCTION | |
3285 | ||
3286 | decode_fund_type -- translate basic DWARF type to gdb base type | |
3287 | ||
3288 | DESCRIPTION | |
3289 | ||
3290 | Given an integer that is one of the fundamental DWARF types, | |
3291 | translate it to one of the basic internal gdb types and return | |
3292 | a pointer to the appropriate gdb type (a "struct type *"). | |
3293 | ||
3294 | NOTES | |
3295 | ||
85f0a848 FF |
3296 | For robustness, if we are asked to translate a fundamental |
3297 | type that we are unprepared to deal with, we return int so | |
3298 | callers can always depend upon a valid type being returned, | |
3299 | and so gdb may at least do something reasonable by default. | |
3300 | If the type is not in the range of those types defined as | |
3301 | application specific types, we also issue a warning. | |
35f5886e FF |
3302 | */ |
3303 | ||
3304 | static struct type * | |
1ab3bf1b JG |
3305 | decode_fund_type (fundtype) |
3306 | unsigned int fundtype; | |
35f5886e FF |
3307 | { |
3308 | struct type *typep = NULL; | |
3309 | ||
3310 | switch (fundtype) | |
3311 | { | |
3312 | ||
3313 | case FT_void: | |
bf229b4e | 3314 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); |
35f5886e FF |
3315 | break; |
3316 | ||
1ab3bf1b | 3317 | case FT_boolean: /* Was FT_set in AT&T version */ |
bf229b4e | 3318 | typep = dwarf_fundamental_type (current_objfile, FT_BOOLEAN); |
1ab3bf1b JG |
3319 | break; |
3320 | ||
35f5886e | 3321 | case FT_pointer: /* (void *) */ |
bf229b4e | 3322 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); |
1ab3bf1b | 3323 | typep = lookup_pointer_type (typep); |
35f5886e FF |
3324 | break; |
3325 | ||
3326 | case FT_char: | |
bf229b4e | 3327 | typep = dwarf_fundamental_type (current_objfile, FT_CHAR); |
1ab3bf1b JG |
3328 | break; |
3329 | ||
35f5886e | 3330 | case FT_signed_char: |
bf229b4e | 3331 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_CHAR); |
1ab3bf1b JG |
3332 | break; |
3333 | ||
3334 | case FT_unsigned_char: | |
bf229b4e | 3335 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); |
35f5886e FF |
3336 | break; |
3337 | ||
3338 | case FT_short: | |
bf229b4e | 3339 | typep = dwarf_fundamental_type (current_objfile, FT_SHORT); |
1ab3bf1b JG |
3340 | break; |
3341 | ||
35f5886e | 3342 | case FT_signed_short: |
bf229b4e | 3343 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_SHORT); |
1ab3bf1b JG |
3344 | break; |
3345 | ||
3346 | case FT_unsigned_short: | |
bf229b4e | 3347 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); |
35f5886e FF |
3348 | break; |
3349 | ||
3350 | case FT_integer: | |
bf229b4e | 3351 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1ab3bf1b JG |
3352 | break; |
3353 | ||
35f5886e | 3354 | case FT_signed_integer: |
bf229b4e | 3355 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_INTEGER); |
1ab3bf1b JG |
3356 | break; |
3357 | ||
3358 | case FT_unsigned_integer: | |
bf229b4e | 3359 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); |
35f5886e FF |
3360 | break; |
3361 | ||
3362 | case FT_long: | |
bf229b4e | 3363 | typep = dwarf_fundamental_type (current_objfile, FT_LONG); |
1ab3bf1b JG |
3364 | break; |
3365 | ||
35f5886e | 3366 | case FT_signed_long: |
bf229b4e | 3367 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG); |
35f5886e FF |
3368 | break; |
3369 | ||
1ab3bf1b | 3370 | case FT_unsigned_long: |
bf229b4e | 3371 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG); |
35f5886e FF |
3372 | break; |
3373 | ||
1ab3bf1b | 3374 | case FT_long_long: |
bf229b4e | 3375 | typep = dwarf_fundamental_type (current_objfile, FT_LONG_LONG); |
35f5886e | 3376 | break; |
1ab3bf1b JG |
3377 | |
3378 | case FT_signed_long_long: | |
bf229b4e | 3379 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG_LONG); |
35f5886e | 3380 | break; |
1ab3bf1b JG |
3381 | |
3382 | case FT_unsigned_long_long: | |
bf229b4e | 3383 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); |
35f5886e | 3384 | break; |
1ab3bf1b JG |
3385 | |
3386 | case FT_float: | |
bf229b4e | 3387 | typep = dwarf_fundamental_type (current_objfile, FT_FLOAT); |
35f5886e FF |
3388 | break; |
3389 | ||
1ab3bf1b | 3390 | case FT_dbl_prec_float: |
bf229b4e | 3391 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); |
35f5886e FF |
3392 | break; |
3393 | ||
3394 | case FT_ext_prec_float: | |
bf229b4e | 3395 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); |
35f5886e FF |
3396 | break; |
3397 | ||
3398 | case FT_complex: | |
bf229b4e | 3399 | typep = dwarf_fundamental_type (current_objfile, FT_COMPLEX); |
35f5886e FF |
3400 | break; |
3401 | ||
3402 | case FT_dbl_prec_complex: | |
bf229b4e | 3403 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_COMPLEX); |
35f5886e FF |
3404 | break; |
3405 | ||
1ab3bf1b | 3406 | case FT_ext_prec_complex: |
bf229b4e | 3407 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_COMPLEX); |
35f5886e | 3408 | break; |
1ab3bf1b | 3409 | |
35f5886e FF |
3410 | } |
3411 | ||
85f0a848 | 3412 | if (typep == NULL) |
35f5886e | 3413 | { |
85f0a848 FF |
3414 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
3415 | if (!(FT_lo_user <= fundtype && fundtype <= FT_hi_user)) | |
3416 | { | |
51b80b00 | 3417 | complain (&unexpected_fund_type, DIE_ID, DIE_NAME, fundtype); |
85f0a848 | 3418 | } |
35f5886e FF |
3419 | } |
3420 | ||
3421 | return (typep); | |
3422 | } | |
3423 | ||
3424 | /* | |
3425 | ||
3426 | LOCAL FUNCTION | |
3427 | ||
3428 | create_name -- allocate a fresh copy of a string on an obstack | |
3429 | ||
3430 | DESCRIPTION | |
3431 | ||
3432 | Given a pointer to a string and a pointer to an obstack, allocates | |
3433 | a fresh copy of the string on the specified obstack. | |
3434 | ||
3435 | */ | |
3436 | ||
3437 | static char * | |
1ab3bf1b JG |
3438 | create_name (name, obstackp) |
3439 | char *name; | |
3440 | struct obstack *obstackp; | |
35f5886e FF |
3441 | { |
3442 | int length; | |
3443 | char *newname; | |
3444 | ||
3445 | length = strlen (name) + 1; | |
3446 | newname = (char *) obstack_alloc (obstackp, length); | |
4ed3a9ea | 3447 | strcpy (newname, name); |
35f5886e FF |
3448 | return (newname); |
3449 | } | |
3450 | ||
3451 | /* | |
3452 | ||
3453 | LOCAL FUNCTION | |
3454 | ||
3455 | basicdieinfo -- extract the minimal die info from raw die data | |
3456 | ||
3457 | SYNOPSIS | |
3458 | ||
95967e73 FF |
3459 | void basicdieinfo (char *diep, struct dieinfo *dip, |
3460 | struct objfile *objfile) | |
35f5886e FF |
3461 | |
3462 | DESCRIPTION | |
3463 | ||
3464 | Given a pointer to raw DIE data, and a pointer to an instance of a | |
3465 | die info structure, this function extracts the basic information | |
3466 | from the DIE data required to continue processing this DIE, along | |
3467 | with some bookkeeping information about the DIE. | |
3468 | ||
3469 | The information we absolutely must have includes the DIE tag, | |
3470 | and the DIE length. If we need the sibling reference, then we | |
3471 | will have to call completedieinfo() to process all the remaining | |
3472 | DIE information. | |
3473 | ||
3474 | Note that since there is no guarantee that the data is properly | |
3475 | aligned in memory for the type of access required (indirection | |
95967e73 FF |
3476 | through anything other than a char pointer), and there is no |
3477 | guarantee that it is in the same byte order as the gdb host, | |
3478 | we call a function which deals with both alignment and byte | |
3479 | swapping issues. Possibly inefficient, but quite portable. | |
35f5886e FF |
3480 | |
3481 | We also take care of some other basic things at this point, such | |
3482 | as ensuring that the instance of the die info structure starts | |
3483 | out completely zero'd and that curdie is initialized for use | |
3484 | in error reporting if we have a problem with the current die. | |
3485 | ||
3486 | NOTES | |
3487 | ||
3488 | All DIE's must have at least a valid length, thus the minimum | |
13b5a7ff FF |
3489 | DIE size is SIZEOF_DIE_LENGTH. In order to have a valid tag, the |
3490 | DIE size must be at least SIZEOF_DIE_TAG larger, otherwise they | |
35f5886e FF |
3491 | are forced to be TAG_padding DIES. |
3492 | ||
13b5a7ff FF |
3493 | Padding DIES must be at least SIZEOF_DIE_LENGTH in length, implying |
3494 | that if a padding DIE is used for alignment and the amount needed is | |
3495 | less than SIZEOF_DIE_LENGTH, then the padding DIE has to be big | |
3496 | enough to align to the next alignment boundry. | |
4090fe1c FF |
3497 | |
3498 | We do some basic sanity checking here, such as verifying that the | |
3499 | length of the die would not cause it to overrun the recorded end of | |
3500 | the buffer holding the DIE info. If we find a DIE that is either | |
3501 | too small or too large, we force it's length to zero which should | |
3502 | cause the caller to take appropriate action. | |
35f5886e FF |
3503 | */ |
3504 | ||
3505 | static void | |
95967e73 | 3506 | basicdieinfo (dip, diep, objfile) |
1ab3bf1b JG |
3507 | struct dieinfo *dip; |
3508 | char *diep; | |
95967e73 | 3509 | struct objfile *objfile; |
35f5886e FF |
3510 | { |
3511 | curdie = dip; | |
4ed3a9ea | 3512 | memset (dip, 0, sizeof (struct dieinfo)); |
35f5886e | 3513 | dip -> die = diep; |
13b5a7ff FF |
3514 | dip -> die_ref = dbroff + (diep - dbbase); |
3515 | dip -> die_length = target_to_host (diep, SIZEOF_DIE_LENGTH, GET_UNSIGNED, | |
3516 | objfile); | |
4090fe1c FF |
3517 | if ((dip -> die_length < SIZEOF_DIE_LENGTH) || |
3518 | ((diep + dip -> die_length) > (dbbase + dbsize))) | |
35f5886e | 3519 | { |
51b80b00 | 3520 | complain (&malformed_die, DIE_ID, DIE_NAME, dip -> die_length); |
4090fe1c | 3521 | dip -> die_length = 0; |
35f5886e | 3522 | } |
13b5a7ff | 3523 | else if (dip -> die_length < (SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG)) |
35f5886e | 3524 | { |
13b5a7ff | 3525 | dip -> die_tag = TAG_padding; |
35f5886e FF |
3526 | } |
3527 | else | |
3528 | { | |
13b5a7ff FF |
3529 | diep += SIZEOF_DIE_LENGTH; |
3530 | dip -> die_tag = target_to_host (diep, SIZEOF_DIE_TAG, GET_UNSIGNED, | |
3531 | objfile); | |
35f5886e FF |
3532 | } |
3533 | } | |
3534 | ||
3535 | /* | |
3536 | ||
3537 | LOCAL FUNCTION | |
3538 | ||
3539 | completedieinfo -- finish reading the information for a given DIE | |
3540 | ||
3541 | SYNOPSIS | |
3542 | ||
95967e73 | 3543 | void completedieinfo (struct dieinfo *dip, struct objfile *objfile) |
35f5886e FF |
3544 | |
3545 | DESCRIPTION | |
3546 | ||
3547 | Given a pointer to an already partially initialized die info structure, | |
3548 | scan the raw DIE data and finish filling in the die info structure | |
3549 | from the various attributes found. | |
3550 | ||
3551 | Note that since there is no guarantee that the data is properly | |
3552 | aligned in memory for the type of access required (indirection | |
95967e73 FF |
3553 | through anything other than a char pointer), and there is no |
3554 | guarantee that it is in the same byte order as the gdb host, | |
3555 | we call a function which deals with both alignment and byte | |
3556 | swapping issues. Possibly inefficient, but quite portable. | |
35f5886e FF |
3557 | |
3558 | NOTES | |
3559 | ||
3560 | Each time we are called, we increment the diecount variable, which | |
3561 | keeps an approximate count of the number of dies processed for | |
3562 | each compilation unit. This information is presented to the user | |
3563 | if the info_verbose flag is set. | |
3564 | ||
3565 | */ | |
3566 | ||
3567 | static void | |
95967e73 | 3568 | completedieinfo (dip, objfile) |
1ab3bf1b | 3569 | struct dieinfo *dip; |
95967e73 | 3570 | struct objfile *objfile; |
35f5886e FF |
3571 | { |
3572 | char *diep; /* Current pointer into raw DIE data */ | |
3573 | char *end; /* Terminate DIE scan here */ | |
3574 | unsigned short attr; /* Current attribute being scanned */ | |
3575 | unsigned short form; /* Form of the attribute */ | |
13b5a7ff | 3576 | int nbytes; /* Size of next field to read */ |
35f5886e FF |
3577 | |
3578 | diecount++; | |
3579 | diep = dip -> die; | |
13b5a7ff FF |
3580 | end = diep + dip -> die_length; |
3581 | diep += SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG; | |
35f5886e FF |
3582 | while (diep < end) |
3583 | { | |
13b5a7ff FF |
3584 | attr = target_to_host (diep, SIZEOF_ATTRIBUTE, GET_UNSIGNED, objfile); |
3585 | diep += SIZEOF_ATTRIBUTE; | |
3586 | if ((nbytes = attribute_size (attr)) == -1) | |
3587 | { | |
51b80b00 | 3588 | complain (&unknown_attribute_length, DIE_ID, DIE_NAME); |
13b5a7ff FF |
3589 | diep = end; |
3590 | continue; | |
3591 | } | |
35f5886e FF |
3592 | switch (attr) |
3593 | { | |
3594 | case AT_fund_type: | |
13b5a7ff FF |
3595 | dip -> at_fund_type = target_to_host (diep, nbytes, GET_UNSIGNED, |
3596 | objfile); | |
35f5886e FF |
3597 | break; |
3598 | case AT_ordering: | |
13b5a7ff FF |
3599 | dip -> at_ordering = target_to_host (diep, nbytes, GET_UNSIGNED, |
3600 | objfile); | |
35f5886e FF |
3601 | break; |
3602 | case AT_bit_offset: | |
13b5a7ff FF |
3603 | dip -> at_bit_offset = target_to_host (diep, nbytes, GET_UNSIGNED, |
3604 | objfile); | |
35f5886e | 3605 | break; |
35f5886e | 3606 | case AT_sibling: |
13b5a7ff FF |
3607 | dip -> at_sibling = target_to_host (diep, nbytes, GET_UNSIGNED, |
3608 | objfile); | |
35f5886e FF |
3609 | break; |
3610 | case AT_stmt_list: | |
13b5a7ff FF |
3611 | dip -> at_stmt_list = target_to_host (diep, nbytes, GET_UNSIGNED, |
3612 | objfile); | |
2d6186f4 | 3613 | dip -> has_at_stmt_list = 1; |
35f5886e FF |
3614 | break; |
3615 | case AT_low_pc: | |
13b5a7ff FF |
3616 | dip -> at_low_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3617 | objfile); | |
4d315a07 | 3618 | dip -> at_low_pc += baseaddr; |
2d6186f4 | 3619 | dip -> has_at_low_pc = 1; |
35f5886e FF |
3620 | break; |
3621 | case AT_high_pc: | |
13b5a7ff FF |
3622 | dip -> at_high_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3623 | objfile); | |
4d315a07 | 3624 | dip -> at_high_pc += baseaddr; |
35f5886e FF |
3625 | break; |
3626 | case AT_language: | |
13b5a7ff FF |
3627 | dip -> at_language = target_to_host (diep, nbytes, GET_UNSIGNED, |
3628 | objfile); | |
35f5886e FF |
3629 | break; |
3630 | case AT_user_def_type: | |
13b5a7ff FF |
3631 | dip -> at_user_def_type = target_to_host (diep, nbytes, |
3632 | GET_UNSIGNED, objfile); | |
35f5886e FF |
3633 | break; |
3634 | case AT_byte_size: | |
13b5a7ff FF |
3635 | dip -> at_byte_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3636 | objfile); | |
50055e94 | 3637 | dip -> has_at_byte_size = 1; |
35f5886e FF |
3638 | break; |
3639 | case AT_bit_size: | |
13b5a7ff FF |
3640 | dip -> at_bit_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3641 | objfile); | |
35f5886e FF |
3642 | break; |
3643 | case AT_member: | |
13b5a7ff FF |
3644 | dip -> at_member = target_to_host (diep, nbytes, GET_UNSIGNED, |
3645 | objfile); | |
35f5886e FF |
3646 | break; |
3647 | case AT_discr: | |
13b5a7ff FF |
3648 | dip -> at_discr = target_to_host (diep, nbytes, GET_UNSIGNED, |
3649 | objfile); | |
35f5886e | 3650 | break; |
35f5886e FF |
3651 | case AT_location: |
3652 | dip -> at_location = diep; | |
3653 | break; | |
3654 | case AT_mod_fund_type: | |
3655 | dip -> at_mod_fund_type = diep; | |
3656 | break; | |
3657 | case AT_subscr_data: | |
3658 | dip -> at_subscr_data = diep; | |
3659 | break; | |
3660 | case AT_mod_u_d_type: | |
3661 | dip -> at_mod_u_d_type = diep; | |
3662 | break; | |
35f5886e FF |
3663 | case AT_element_list: |
3664 | dip -> at_element_list = diep; | |
768be6e1 FF |
3665 | dip -> short_element_list = 0; |
3666 | break; | |
3667 | case AT_short_element_list: | |
3668 | dip -> at_element_list = diep; | |
3669 | dip -> short_element_list = 1; | |
35f5886e FF |
3670 | break; |
3671 | case AT_discr_value: | |
3672 | dip -> at_discr_value = diep; | |
3673 | break; | |
3674 | case AT_string_length: | |
3675 | dip -> at_string_length = diep; | |
3676 | break; | |
3677 | case AT_name: | |
3678 | dip -> at_name = diep; | |
3679 | break; | |
3680 | case AT_comp_dir: | |
d4902ab0 FF |
3681 | /* For now, ignore any "hostname:" portion, since gdb doesn't |
3682 | know how to deal with it. (FIXME). */ | |
3683 | dip -> at_comp_dir = strrchr (diep, ':'); | |
3684 | if (dip -> at_comp_dir != NULL) | |
3685 | { | |
3686 | dip -> at_comp_dir++; | |
3687 | } | |
3688 | else | |
3689 | { | |
3690 | dip -> at_comp_dir = diep; | |
3691 | } | |
35f5886e FF |
3692 | break; |
3693 | case AT_producer: | |
3694 | dip -> at_producer = diep; | |
3695 | break; | |
35f5886e | 3696 | case AT_start_scope: |
13b5a7ff FF |
3697 | dip -> at_start_scope = target_to_host (diep, nbytes, GET_UNSIGNED, |
3698 | objfile); | |
35f5886e FF |
3699 | break; |
3700 | case AT_stride_size: | |
13b5a7ff FF |
3701 | dip -> at_stride_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3702 | objfile); | |
35f5886e FF |
3703 | break; |
3704 | case AT_src_info: | |
13b5a7ff FF |
3705 | dip -> at_src_info = target_to_host (diep, nbytes, GET_UNSIGNED, |
3706 | objfile); | |
35f5886e FF |
3707 | break; |
3708 | case AT_prototyped: | |
13b5a7ff | 3709 | dip -> at_prototyped = diep; |
35f5886e | 3710 | break; |
35f5886e FF |
3711 | default: |
3712 | /* Found an attribute that we are unprepared to handle. However | |
3713 | it is specifically one of the design goals of DWARF that | |
3714 | consumers should ignore unknown attributes. As long as the | |
3715 | form is one that we recognize (so we know how to skip it), | |
3716 | we can just ignore the unknown attribute. */ | |
3717 | break; | |
3718 | } | |
13b5a7ff | 3719 | form = FORM_FROM_ATTR (attr); |
35f5886e FF |
3720 | switch (form) |
3721 | { | |
3722 | case FORM_DATA2: | |
13b5a7ff | 3723 | diep += 2; |
35f5886e FF |
3724 | break; |
3725 | case FORM_DATA4: | |
13b5a7ff FF |
3726 | case FORM_REF: |
3727 | diep += 4; | |
35f5886e FF |
3728 | break; |
3729 | case FORM_DATA8: | |
13b5a7ff | 3730 | diep += 8; |
35f5886e FF |
3731 | break; |
3732 | case FORM_ADDR: | |
13b5a7ff | 3733 | diep += TARGET_FT_POINTER_SIZE (objfile); |
35f5886e FF |
3734 | break; |
3735 | case FORM_BLOCK2: | |
13b5a7ff | 3736 | diep += 2 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); |
35f5886e FF |
3737 | break; |
3738 | case FORM_BLOCK4: | |
13b5a7ff | 3739 | diep += 4 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); |
35f5886e FF |
3740 | break; |
3741 | case FORM_STRING: | |
3742 | diep += strlen (diep) + 1; | |
3743 | break; | |
3744 | default: | |
51b80b00 | 3745 | complain (&unknown_attribute_form, DIE_ID, DIE_NAME, form); |
35f5886e FF |
3746 | diep = end; |
3747 | break; | |
3748 | } | |
3749 | } | |
3750 | } | |
95967e73 | 3751 | |
13b5a7ff | 3752 | /* |
95967e73 | 3753 | |
13b5a7ff FF |
3754 | LOCAL FUNCTION |
3755 | ||
3756 | target_to_host -- swap in target data to host | |
3757 | ||
3758 | SYNOPSIS | |
3759 | ||
3760 | target_to_host (char *from, int nbytes, int signextend, | |
3761 | struct objfile *objfile) | |
3762 | ||
3763 | DESCRIPTION | |
3764 | ||
3765 | Given pointer to data in target format in FROM, a byte count for | |
3766 | the size of the data in NBYTES, a flag indicating whether or not | |
3767 | the data is signed in SIGNEXTEND, and a pointer to the current | |
3768 | objfile in OBJFILE, convert the data to host format and return | |
3769 | the converted value. | |
3770 | ||
3771 | NOTES | |
3772 | ||
3773 | FIXME: If we read data that is known to be signed, and expect to | |
3774 | use it as signed data, then we need to explicitly sign extend the | |
3775 | result until the bfd library is able to do this for us. | |
3776 | ||
3777 | */ | |
3778 | ||
3779 | static unsigned long | |
3780 | target_to_host (from, nbytes, signextend, objfile) | |
95967e73 FF |
3781 | char *from; |
3782 | int nbytes; | |
13b5a7ff | 3783 | int signextend; /* FIXME: Unused */ |
95967e73 FF |
3784 | struct objfile *objfile; |
3785 | { | |
13b5a7ff | 3786 | unsigned long rtnval; |
95967e73 FF |
3787 | |
3788 | switch (nbytes) | |
3789 | { | |
95967e73 | 3790 | case 8: |
13b5a7ff | 3791 | rtnval = bfd_get_64 (objfile -> obfd, (bfd_byte *) from); |
95967e73 | 3792 | break; |
95967e73 | 3793 | case 4: |
13b5a7ff | 3794 | rtnval = bfd_get_32 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3795 | break; |
3796 | case 2: | |
13b5a7ff | 3797 | rtnval = bfd_get_16 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3798 | break; |
3799 | case 1: | |
13b5a7ff | 3800 | rtnval = bfd_get_8 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3801 | break; |
3802 | default: | |
51b80b00 | 3803 | complain (&no_bfd_get_N, DIE_ID, DIE_NAME, nbytes); |
13b5a7ff | 3804 | rtnval = 0; |
95967e73 FF |
3805 | break; |
3806 | } | |
13b5a7ff | 3807 | return (rtnval); |
95967e73 FF |
3808 | } |
3809 | ||
13b5a7ff FF |
3810 | /* |
3811 | ||
3812 | LOCAL FUNCTION | |
3813 | ||
3814 | attribute_size -- compute size of data for a DWARF attribute | |
3815 | ||
3816 | SYNOPSIS | |
3817 | ||
3818 | static int attribute_size (unsigned int attr) | |
3819 | ||
3820 | DESCRIPTION | |
3821 | ||
3822 | Given a DWARF attribute in ATTR, compute the size of the first | |
3823 | piece of data associated with this attribute and return that | |
3824 | size. | |
3825 | ||
3826 | Returns -1 for unrecognized attributes. | |
3827 | ||
3828 | */ | |
3829 | ||
3830 | static int | |
3831 | attribute_size (attr) | |
3832 | unsigned int attr; | |
3833 | { | |
3834 | int nbytes; /* Size of next data for this attribute */ | |
3835 | unsigned short form; /* Form of the attribute */ | |
3836 | ||
3837 | form = FORM_FROM_ATTR (attr); | |
3838 | switch (form) | |
3839 | { | |
3840 | case FORM_STRING: /* A variable length field is next */ | |
3841 | nbytes = 0; | |
3842 | break; | |
3843 | case FORM_DATA2: /* Next 2 byte field is the data itself */ | |
3844 | case FORM_BLOCK2: /* Next 2 byte field is a block length */ | |
3845 | nbytes = 2; | |
3846 | break; | |
3847 | case FORM_DATA4: /* Next 4 byte field is the data itself */ | |
3848 | case FORM_BLOCK4: /* Next 4 byte field is a block length */ | |
3849 | case FORM_REF: /* Next 4 byte field is a DIE offset */ | |
3850 | nbytes = 4; | |
3851 | break; | |
3852 | case FORM_DATA8: /* Next 8 byte field is the data itself */ | |
3853 | nbytes = 8; | |
3854 | break; | |
3855 | case FORM_ADDR: /* Next field size is target sizeof(void *) */ | |
3856 | nbytes = TARGET_FT_POINTER_SIZE (objfile); | |
3857 | break; | |
3858 | default: | |
51b80b00 | 3859 | complain (&unknown_attribute_form, DIE_ID, DIE_NAME, form); |
13b5a7ff FF |
3860 | nbytes = -1; |
3861 | break; | |
3862 | } | |
3863 | return (nbytes); | |
3864 | } |