Commit | Line | Data |
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35f5886e | 1 | /* DWARF debugging format support for GDB. |
1ab3bf1b JG |
2 | Copyright (C) 1991, 1992 Free Software Foundation, Inc. |
3 | Written by Fred Fish at Cygnus Support. Portions based on dbxread.c, | |
35f5886e FF |
4 | mipsread.c, coffread.c, and dwarfread.c from a Data General SVR4 gdb port. |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
21 | ||
22 | /* | |
23 | ||
24 | FIXME: Figure out how to get the frame pointer register number in the | |
25 | execution environment of the target. Remove R_FP kludge | |
26 | ||
27 | FIXME: Add generation of dependencies list to partial symtab code. | |
28 | ||
35f5886e FF |
29 | FIXME: Resolve minor differences between what information we put in the |
30 | partial symbol table and what dbxread puts in. For example, we don't yet | |
31 | put enum constants there. And dbxread seems to invent a lot of typedefs | |
32 | we never see. Use the new printpsym command to see the partial symbol table | |
33 | contents. | |
34 | ||
35f5886e FF |
35 | FIXME: Figure out a better way to tell gdb about the name of the function |
36 | contain the user's entry point (I.E. main()) | |
37 | ||
35f5886e FF |
38 | FIXME: See other FIXME's and "ifdef 0" scattered throughout the code for |
39 | other things to work on, if you get bored. :-) | |
40 | ||
41 | */ | |
4d315a07 | 42 | |
d747e0af | 43 | #include "defs.h" |
35f5886e FF |
44 | #include "bfd.h" |
45 | #include "symtab.h" | |
1ab3bf1b | 46 | #include "gdbtypes.h" |
35f5886e | 47 | #include "symfile.h" |
5e2e79f8 | 48 | #include "objfiles.h" |
13b5a7ff | 49 | #include "libbfd.h" /* FIXME Secret Internal BFD stuff (bfd_read) */ |
f5f0679a | 50 | #include "elf/dwarf.h" |
4d315a07 | 51 | #include "buildsym.h" |
2dbde378 | 52 | #include "demangle.h" |
bf229b4e FF |
53 | #include "expression.h" /* Needed for enum exp_opcode in language.h, sigh... */ |
54 | #include "language.h" | |
51b80b00 | 55 | #include "complaints.h" |
35f5886e | 56 | |
d5931d79 JG |
57 | #include <fcntl.h> |
58 | #include <string.h> | |
603900c7 | 59 | #include <sys/types.h> |
51b80b00 | 60 | |
d5931d79 JG |
61 | #ifndef NO_SYS_FILE |
62 | #include <sys/file.h> | |
63 | #endif | |
64 | ||
65 | /* FIXME -- convert this to SEEK_SET a la POSIX, move to config files. */ | |
66 | #ifndef L_SET | |
67 | #define L_SET 0 | |
68 | #endif | |
69 | ||
51b80b00 FF |
70 | /* Some macros to provide DIE info for complaints. */ |
71 | ||
72 | #define DIE_ID (curdie!=NULL ? curdie->die_ref : 0) | |
73 | #define DIE_NAME (curdie!=NULL && curdie->at_name!=NULL) ? curdie->at_name : "" | |
74 | ||
75 | /* Complaints that can be issued during DWARF debug info reading. */ | |
76 | ||
77 | struct complaint no_bfd_get_N = | |
78 | { | |
79 | "DIE @ 0x%x \"%s\", no bfd support for %d byte data object", 0, 0 | |
80 | }; | |
81 | ||
82 | struct complaint malformed_die = | |
83 | { | |
84 | "DIE @ 0x%x \"%s\", malformed DIE, bad length (%d bytes)", 0, 0 | |
85 | }; | |
86 | ||
87 | struct complaint bad_die_ref = | |
88 | { | |
89 | "DIE @ 0x%x \"%s\", reference to DIE (0x%x) outside compilation unit", 0, 0 | |
90 | }; | |
91 | ||
92 | struct complaint unknown_attribute_form = | |
93 | { | |
94 | "DIE @ 0x%x \"%s\", unknown attribute form (0x%x)", 0, 0 | |
95 | }; | |
96 | ||
97 | struct complaint unknown_attribute_length = | |
98 | { | |
99 | "DIE @ 0x%x \"%s\", unknown attribute length, skipped remaining attributes", 0, 0 | |
100 | }; | |
101 | ||
102 | struct complaint unexpected_fund_type = | |
103 | { | |
104 | "DIE @ 0x%x \"%s\", unexpected fundamental type 0x%x", 0, 0 | |
105 | }; | |
106 | ||
107 | struct complaint unknown_type_modifier = | |
108 | { | |
109 | "DIE @ 0x%x \"%s\", unknown type modifier %u", 0, 0 | |
110 | }; | |
111 | ||
112 | struct complaint volatile_ignored = | |
113 | { | |
114 | "DIE @ 0x%x \"%s\", type modifier 'volatile' ignored", 0, 0 | |
115 | }; | |
116 | ||
117 | struct complaint const_ignored = | |
118 | { | |
119 | "DIE @ 0x%x \"%s\", type modifier 'const' ignored", 0, 0 | |
120 | }; | |
121 | ||
122 | struct complaint botched_modified_type = | |
123 | { | |
124 | "DIE @ 0x%x \"%s\", botched modified type decoding (mtype 0x%x)", 0, 0 | |
125 | }; | |
126 | ||
127 | struct complaint op_deref2 = | |
128 | { | |
129 | "DIE @ 0x%x \"%s\", OP_DEREF2 address 0x%x not handled", 0, 0 | |
130 | }; | |
131 | ||
132 | struct complaint op_deref4 = | |
133 | { | |
134 | "DIE @ 0x%x \"%s\", OP_DEREF4 address 0x%x not handled", 0, 0 | |
135 | }; | |
136 | ||
137 | struct complaint basereg_not_handled = | |
138 | { | |
139 | "DIE @ 0x%x \"%s\", BASEREG %d not handled", 0, 0 | |
140 | }; | |
141 | ||
142 | struct complaint dup_user_type_allocation = | |
143 | { | |
144 | "DIE @ 0x%x \"%s\", internal error: duplicate user type allocation", 0, 0 | |
145 | }; | |
146 | ||
147 | struct complaint dup_user_type_definition = | |
148 | { | |
149 | "DIE @ 0x%x \"%s\", internal error: duplicate user type definition", 0, 0 | |
150 | }; | |
151 | ||
152 | struct complaint missing_tag = | |
153 | { | |
154 | "DIE @ 0x%x \"%s\", missing class, structure, or union tag", 0, 0 | |
155 | }; | |
156 | ||
157 | struct complaint bad_array_element_type = | |
158 | { | |
159 | "DIE @ 0x%x \"%s\", bad array element type attribute 0x%x", 0, 0 | |
160 | }; | |
161 | ||
162 | struct complaint subscript_data_items = | |
163 | { | |
164 | "DIE @ 0x%x \"%s\", can't decode subscript data items", 0, 0 | |
165 | }; | |
166 | ||
167 | struct complaint unhandled_array_subscript_format = | |
168 | { | |
169 | "DIE @ 0x%x \"%s\", array subscript format 0x%x not handled yet", 0, 0 | |
170 | }; | |
171 | ||
172 | struct complaint unknown_array_subscript_format = | |
173 | { | |
174 | "DIE @ 0x%x \"%s\", unknown array subscript format %x", 0, 0 | |
175 | }; | |
176 | ||
177 | struct complaint not_row_major = | |
178 | { | |
179 | "DIE @ 0x%x \"%s\", array not row major; not handled correctly", 0, 0 | |
180 | }; | |
35f5886e FF |
181 | |
182 | #ifndef R_FP /* FIXME */ | |
183 | #define R_FP 14 /* Kludge to get frame pointer register number */ | |
184 | #endif | |
185 | ||
13b5a7ff | 186 | typedef unsigned int DIE_REF; /* Reference to a DIE */ |
35f5886e | 187 | |
4d315a07 FF |
188 | #ifndef GCC_PRODUCER |
189 | #define GCC_PRODUCER "GNU C " | |
190 | #endif | |
35f5886e | 191 | |
2dbde378 FF |
192 | #ifndef GPLUS_PRODUCER |
193 | #define GPLUS_PRODUCER "GNU C++ " | |
194 | #endif | |
195 | ||
196 | #ifndef LCC_PRODUCER | |
3dc755fb | 197 | #define LCC_PRODUCER "NCR C/C++" |
2dbde378 FF |
198 | #endif |
199 | ||
200 | #ifndef CFRONT_PRODUCER | |
201 | #define CFRONT_PRODUCER "CFRONT " /* A wild a** guess... */ | |
202 | #endif | |
203 | ||
93bb6e65 FF |
204 | /* start-sanitize-chill */ |
205 | #ifndef CHILL_PRODUCER | |
206 | #define CHILL_PRODUCER "GNU Chill " | |
207 | #endif | |
208 | /* end-sanitize-chill */ | |
209 | ||
13b5a7ff FF |
210 | /* Flags to target_to_host() that tell whether or not the data object is |
211 | expected to be signed. Used, for example, when fetching a signed | |
212 | integer in the target environment which is used as a signed integer | |
213 | in the host environment, and the two environments have different sized | |
214 | ints. In this case, *somebody* has to sign extend the smaller sized | |
215 | int. */ | |
216 | ||
217 | #define GET_UNSIGNED 0 /* No sign extension required */ | |
218 | #define GET_SIGNED 1 /* Sign extension required */ | |
219 | ||
220 | /* Defines for things which are specified in the document "DWARF Debugging | |
221 | Information Format" published by UNIX International, Programming Languages | |
222 | SIG. These defines are based on revision 1.0.0, Jan 20, 1992. */ | |
223 | ||
224 | #define SIZEOF_DIE_LENGTH 4 | |
225 | #define SIZEOF_DIE_TAG 2 | |
226 | #define SIZEOF_ATTRIBUTE 2 | |
227 | #define SIZEOF_FORMAT_SPECIFIER 1 | |
228 | #define SIZEOF_FMT_FT 2 | |
229 | #define SIZEOF_LINETBL_LENGTH 4 | |
230 | #define SIZEOF_LINETBL_LINENO 4 | |
231 | #define SIZEOF_LINETBL_STMT 2 | |
232 | #define SIZEOF_LINETBL_DELTA 4 | |
233 | #define SIZEOF_LOC_ATOM_CODE 1 | |
234 | ||
235 | #define FORM_FROM_ATTR(attr) ((attr) & 0xF) /* Implicitly specified */ | |
236 | ||
237 | /* Macros that return the sizes of various types of data in the target | |
238 | environment. | |
239 | ||
2d6d969c FF |
240 | FIXME: Currently these are just compile time constants (as they are in |
241 | other parts of gdb as well). They need to be able to get the right size | |
242 | either from the bfd or possibly from the DWARF info. It would be nice if | |
243 | the DWARF producer inserted DIES that describe the fundamental types in | |
244 | the target environment into the DWARF info, similar to the way dbx stabs | |
245 | producers produce information about their fundamental types. */ | |
246 | ||
247 | #define TARGET_FT_POINTER_SIZE(objfile) (TARGET_PTR_BIT / TARGET_CHAR_BIT) | |
248 | #define TARGET_FT_LONG_SIZE(objfile) (TARGET_LONG_BIT / TARGET_CHAR_BIT) | |
95967e73 | 249 | |
768be6e1 FF |
250 | /* The Amiga SVR4 header file <dwarf.h> defines AT_element_list as a |
251 | FORM_BLOCK2, and this is the value emitted by the AT&T compiler. | |
252 | However, the Issue 2 DWARF specification from AT&T defines it as | |
253 | a FORM_BLOCK4, as does the latest specification from UI/PLSIG. | |
254 | For backwards compatibility with the AT&T compiler produced executables | |
255 | we define AT_short_element_list for this variant. */ | |
256 | ||
257 | #define AT_short_element_list (0x00f0|FORM_BLOCK2) | |
258 | ||
259 | /* External variables referenced. */ | |
260 | ||
35f5886e | 261 | extern int info_verbose; /* From main.c; nonzero => verbose */ |
318bf84f | 262 | extern char *warning_pre_print; /* From utils.c */ |
35f5886e FF |
263 | |
264 | /* The DWARF debugging information consists of two major pieces, | |
265 | one is a block of DWARF Information Entries (DIE's) and the other | |
266 | is a line number table. The "struct dieinfo" structure contains | |
267 | the information for a single DIE, the one currently being processed. | |
268 | ||
269 | In order to make it easier to randomly access the attribute fields | |
13b5a7ff | 270 | of the current DIE, which are specifically unordered within the DIE, |
35f5886e FF |
271 | each DIE is scanned and an instance of the "struct dieinfo" |
272 | structure is initialized. | |
273 | ||
274 | Initialization is done in two levels. The first, done by basicdieinfo(), | |
275 | just initializes those fields that are vital to deciding whether or not | |
276 | to use this DIE, how to skip past it, etc. The second, done by the | |
277 | function completedieinfo(), fills in the rest of the information. | |
278 | ||
279 | Attributes which have block forms are not interpreted at the time | |
280 | the DIE is scanned, instead we just save pointers to the start | |
281 | of their value fields. | |
282 | ||
283 | Some fields have a flag <name>_p that is set when the value of the | |
284 | field is valid (I.E. we found a matching attribute in the DIE). Since | |
285 | we may want to test for the presence of some attributes in the DIE, | |
2d6186f4 | 286 | such as AT_low_pc, without restricting the values of the field, |
35f5886e FF |
287 | we need someway to note that we found such an attribute. |
288 | ||
289 | */ | |
290 | ||
291 | typedef char BLOCK; | |
292 | ||
293 | struct dieinfo { | |
13b5a7ff FF |
294 | char * die; /* Pointer to the raw DIE data */ |
295 | unsigned long die_length; /* Length of the raw DIE data */ | |
296 | DIE_REF die_ref; /* Offset of this DIE */ | |
297 | unsigned short die_tag; /* Tag for this DIE */ | |
298 | unsigned long at_padding; | |
299 | unsigned long at_sibling; | |
300 | BLOCK * at_location; | |
301 | char * at_name; | |
302 | unsigned short at_fund_type; | |
303 | BLOCK * at_mod_fund_type; | |
304 | unsigned long at_user_def_type; | |
305 | BLOCK * at_mod_u_d_type; | |
306 | unsigned short at_ordering; | |
307 | BLOCK * at_subscr_data; | |
308 | unsigned long at_byte_size; | |
309 | unsigned short at_bit_offset; | |
310 | unsigned long at_bit_size; | |
311 | BLOCK * at_element_list; | |
312 | unsigned long at_stmt_list; | |
313 | unsigned long at_low_pc; | |
314 | unsigned long at_high_pc; | |
315 | unsigned long at_language; | |
316 | unsigned long at_member; | |
317 | unsigned long at_discr; | |
318 | BLOCK * at_discr_value; | |
13b5a7ff FF |
319 | BLOCK * at_string_length; |
320 | char * at_comp_dir; | |
321 | char * at_producer; | |
13b5a7ff FF |
322 | unsigned long at_start_scope; |
323 | unsigned long at_stride_size; | |
324 | unsigned long at_src_info; | |
325 | char * at_prototyped; | |
326 | unsigned int has_at_low_pc:1; | |
327 | unsigned int has_at_stmt_list:1; | |
50055e94 | 328 | unsigned int has_at_byte_size:1; |
13b5a7ff | 329 | unsigned int short_element_list:1; |
35f5886e FF |
330 | }; |
331 | ||
332 | static int diecount; /* Approximate count of dies for compilation unit */ | |
333 | static struct dieinfo *curdie; /* For warnings and such */ | |
334 | ||
335 | static char *dbbase; /* Base pointer to dwarf info */ | |
4090fe1c | 336 | static int dbsize; /* Size of dwarf info in bytes */ |
35f5886e FF |
337 | static int dbroff; /* Relative offset from start of .debug section */ |
338 | static char *lnbase; /* Base pointer to line section */ | |
339 | static int isreg; /* Kludge to identify register variables */ | |
a5bd5ba6 | 340 | static int offreg; /* Kludge to identify basereg references */ |
35f5886e | 341 | |
2670f34d JG |
342 | /* This value is added to each symbol value. FIXME: Generalize to |
343 | the section_offsets structure used by dbxread. */ | |
35f5886e FF |
344 | static CORE_ADDR baseaddr; /* Add to each symbol value */ |
345 | ||
2670f34d JG |
346 | /* The section offsets used in the current psymtab or symtab. FIXME, |
347 | only used to pass one value (baseaddr) at the moment. */ | |
348 | static struct section_offsets *base_section_offsets; | |
349 | ||
35f5886e FF |
350 | /* Each partial symbol table entry contains a pointer to private data for the |
351 | read_symtab() function to use when expanding a partial symbol table entry | |
352 | to a full symbol table entry. For DWARF debugging info, this data is | |
353 | contained in the following structure and macros are provided for easy | |
354 | access to the members given a pointer to a partial symbol table entry. | |
355 | ||
356 | dbfoff Always the absolute file offset to the start of the ".debug" | |
357 | section for the file containing the DIE's being accessed. | |
358 | ||
359 | dbroff Relative offset from the start of the ".debug" access to the | |
360 | first DIE to be accessed. When building the partial symbol | |
361 | table, this value will be zero since we are accessing the | |
362 | entire ".debug" section. When expanding a partial symbol | |
363 | table entry, this value will be the offset to the first | |
364 | DIE for the compilation unit containing the symbol that | |
365 | triggers the expansion. | |
366 | ||
367 | dblength The size of the chunk of DIE's being examined, in bytes. | |
368 | ||
369 | lnfoff The absolute file offset to the line table fragment. Ignored | |
370 | when building partial symbol tables, but used when expanding | |
371 | them, and contains the absolute file offset to the fragment | |
372 | of the ".line" section containing the line numbers for the | |
373 | current compilation unit. | |
374 | */ | |
375 | ||
376 | struct dwfinfo { | |
d5931d79 | 377 | file_ptr dbfoff; /* Absolute file offset to start of .debug section */ |
35f5886e FF |
378 | int dbroff; /* Relative offset from start of .debug section */ |
379 | int dblength; /* Size of the chunk of DIE's being examined */ | |
d5931d79 | 380 | file_ptr lnfoff; /* Absolute file offset to line table fragment */ |
35f5886e FF |
381 | }; |
382 | ||
383 | #define DBFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbfoff) | |
384 | #define DBROFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbroff) | |
385 | #define DBLENGTH(p) (((struct dwfinfo *)((p)->read_symtab_private))->dblength) | |
386 | #define LNFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->lnfoff) | |
387 | ||
4d315a07 FF |
388 | /* The generic symbol table building routines have separate lists for |
389 | file scope symbols and all all other scopes (local scopes). So | |
390 | we need to select the right one to pass to add_symbol_to_list(). | |
391 | We do it by keeping a pointer to the correct list in list_in_scope. | |
35f5886e | 392 | |
4d315a07 FF |
393 | FIXME: The original dwarf code just treated the file scope as the first |
394 | local scope, and all other local scopes as nested local scopes, and worked | |
395 | fine. Check to see if we really need to distinguish these in buildsym.c */ | |
35f5886e | 396 | |
99140c31 | 397 | struct pending **list_in_scope = &file_symbols; |
35f5886e FF |
398 | |
399 | /* DIES which have user defined types or modified user defined types refer to | |
400 | other DIES for the type information. Thus we need to associate the offset | |
401 | of a DIE for a user defined type with a pointer to the type information. | |
402 | ||
403 | Originally this was done using a simple but expensive algorithm, with an | |
404 | array of unsorted structures, each containing an offset/type-pointer pair. | |
405 | This array was scanned linearly each time a lookup was done. The result | |
406 | was that gdb was spending over half it's startup time munging through this | |
407 | array of pointers looking for a structure that had the right offset member. | |
408 | ||
409 | The second attempt used the same array of structures, but the array was | |
410 | sorted using qsort each time a new offset/type was recorded, and a binary | |
411 | search was used to find the type pointer for a given DIE offset. This was | |
412 | even slower, due to the overhead of sorting the array each time a new | |
413 | offset/type pair was entered. | |
414 | ||
415 | The third attempt uses a fixed size array of type pointers, indexed by a | |
416 | value derived from the DIE offset. Since the minimum DIE size is 4 bytes, | |
417 | we can divide any DIE offset by 4 to obtain a unique index into this fixed | |
418 | size array. Since each element is a 4 byte pointer, it takes exactly as | |
419 | much memory to hold this array as to hold the DWARF info for a given | |
bf229b4e FF |
420 | compilation unit. But it gets freed as soon as we are done with it. |
421 | This has worked well in practice, as a reasonable tradeoff between memory | |
422 | consumption and speed, without having to resort to much more complicated | |
423 | algorithms. */ | |
35f5886e FF |
424 | |
425 | static struct type **utypes; /* Pointer to array of user type pointers */ | |
426 | static int numutypes; /* Max number of user type pointers */ | |
427 | ||
bf229b4e FF |
428 | /* Maintain an array of referenced fundamental types for the current |
429 | compilation unit being read. For DWARF version 1, we have to construct | |
430 | the fundamental types on the fly, since no information about the | |
431 | fundamental types is supplied. Each such fundamental type is created by | |
432 | calling a language dependent routine to create the type, and then a | |
433 | pointer to that type is then placed in the array at the index specified | |
434 | by it's FT_<TYPENAME> value. The array has a fixed size set by the | |
435 | FT_NUM_MEMBERS compile time constant, which is the number of predefined | |
436 | fundamental types gdb knows how to construct. */ | |
437 | ||
438 | static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */ | |
439 | ||
95ff889e FF |
440 | /* Record the language for the compilation unit which is currently being |
441 | processed. We know it once we have seen the TAG_compile_unit DIE, | |
442 | and we need it while processing the DIE's for that compilation unit. | |
443 | It is eventually saved in the symtab structure, but we don't finalize | |
444 | the symtab struct until we have processed all the DIE's for the | |
bf229b4e FF |
445 | compilation unit. We also need to get and save a pointer to the |
446 | language struct for this language, so we can call the language | |
447 | dependent routines for doing things such as creating fundamental | |
448 | types. */ | |
95ff889e FF |
449 | |
450 | static enum language cu_language; | |
bf229b4e | 451 | static const struct language_defn *cu_language_defn; |
95ff889e | 452 | |
35f5886e | 453 | /* Forward declarations of static functions so we don't have to worry |
1ab3bf1b JG |
454 | about ordering within this file. */ |
455 | ||
13b5a7ff FF |
456 | static int |
457 | attribute_size PARAMS ((unsigned int)); | |
458 | ||
459 | static unsigned long | |
460 | target_to_host PARAMS ((char *, int, int, struct objfile *)); | |
95967e73 | 461 | |
1ab3bf1b JG |
462 | static void |
463 | add_enum_psymbol PARAMS ((struct dieinfo *, struct objfile *)); | |
464 | ||
2dbde378 FF |
465 | static void |
466 | handle_producer PARAMS ((char *)); | |
467 | ||
1ab3bf1b JG |
468 | static void |
469 | read_file_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); | |
35f5886e | 470 | |
58050209 | 471 | static void |
1ab3bf1b | 472 | read_func_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
473 | |
474 | static void | |
1ab3bf1b JG |
475 | read_lexical_block_scope PARAMS ((struct dieinfo *, char *, char *, |
476 | struct objfile *)); | |
35f5886e | 477 | |
35f5886e | 478 | static void |
1ab3bf1b | 479 | scan_partial_symbols PARAMS ((char *, char *, struct objfile *)); |
35f5886e | 480 | |
35f5886e | 481 | static void |
d5931d79 JG |
482 | scan_compilation_units PARAMS ((char *, char *, file_ptr, |
483 | file_ptr, struct objfile *)); | |
35f5886e FF |
484 | |
485 | static void | |
1ab3bf1b | 486 | add_partial_symbol PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e FF |
487 | |
488 | static void | |
1ab3bf1b | 489 | init_psymbol_list PARAMS ((struct objfile *, int)); |
35f5886e FF |
490 | |
491 | static void | |
95967e73 | 492 | basicdieinfo PARAMS ((struct dieinfo *, char *, struct objfile *)); |
35f5886e FF |
493 | |
494 | static void | |
95967e73 | 495 | completedieinfo PARAMS ((struct dieinfo *, struct objfile *)); |
1ab3bf1b JG |
496 | |
497 | static void | |
498 | dwarf_psymtab_to_symtab PARAMS ((struct partial_symtab *)); | |
499 | ||
500 | static void | |
501 | psymtab_to_symtab_1 PARAMS ((struct partial_symtab *)); | |
35f5886e FF |
502 | |
503 | static struct symtab * | |
1ab3bf1b | 504 | read_ofile_symtab PARAMS ((struct partial_symtab *)); |
35f5886e FF |
505 | |
506 | static void | |
1ab3bf1b | 507 | process_dies PARAMS ((char *, char *, struct objfile *)); |
35f5886e FF |
508 | |
509 | static void | |
1ab3bf1b JG |
510 | read_structure_scope PARAMS ((struct dieinfo *, char *, char *, |
511 | struct objfile *)); | |
35f5886e FF |
512 | |
513 | static struct type * | |
84ffdec2 | 514 | decode_array_element_type PARAMS ((char *)); |
35f5886e FF |
515 | |
516 | static struct type * | |
85f0a848 | 517 | decode_subscript_data_item PARAMS ((char *, char *)); |
35f5886e FF |
518 | |
519 | static void | |
1ab3bf1b | 520 | dwarf_read_array_type PARAMS ((struct dieinfo *)); |
35f5886e | 521 | |
9e4c1921 | 522 | static void |
1ab3bf1b | 523 | read_tag_pointer_type PARAMS ((struct dieinfo *dip)); |
9e4c1921 | 524 | |
35f5886e | 525 | static void |
1ab3bf1b | 526 | read_subroutine_type PARAMS ((struct dieinfo *, char *, char *)); |
35f5886e FF |
527 | |
528 | static void | |
1ab3bf1b | 529 | read_enumeration PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
530 | |
531 | static struct type * | |
1ab3bf1b | 532 | struct_type PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
533 | |
534 | static struct type * | |
1ab3bf1b | 535 | enum_type PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e | 536 | |
35f5886e | 537 | static void |
1ab3bf1b | 538 | decode_line_numbers PARAMS ((char *)); |
35f5886e FF |
539 | |
540 | static struct type * | |
1ab3bf1b | 541 | decode_die_type PARAMS ((struct dieinfo *)); |
35f5886e FF |
542 | |
543 | static struct type * | |
1ab3bf1b | 544 | decode_mod_fund_type PARAMS ((char *)); |
35f5886e FF |
545 | |
546 | static struct type * | |
1ab3bf1b | 547 | decode_mod_u_d_type PARAMS ((char *)); |
35f5886e FF |
548 | |
549 | static struct type * | |
1c92ca6f | 550 | decode_modified_type PARAMS ((char *, unsigned int, int)); |
35f5886e FF |
551 | |
552 | static struct type * | |
1ab3bf1b | 553 | decode_fund_type PARAMS ((unsigned int)); |
35f5886e FF |
554 | |
555 | static char * | |
1ab3bf1b | 556 | create_name PARAMS ((char *, struct obstack *)); |
35f5886e | 557 | |
35f5886e | 558 | static struct type * |
13b5a7ff | 559 | lookup_utype PARAMS ((DIE_REF)); |
35f5886e FF |
560 | |
561 | static struct type * | |
13b5a7ff | 562 | alloc_utype PARAMS ((DIE_REF, struct type *)); |
35f5886e FF |
563 | |
564 | static struct symbol * | |
1ab3bf1b | 565 | new_symbol PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e | 566 | |
95ff889e FF |
567 | static void |
568 | synthesize_typedef PARAMS ((struct dieinfo *, struct objfile *, | |
569 | struct type *)); | |
570 | ||
35f5886e | 571 | static int |
1ab3bf1b | 572 | locval PARAMS ((char *)); |
35f5886e FF |
573 | |
574 | static void | |
1ab3bf1b JG |
575 | record_minimal_symbol PARAMS ((char *, CORE_ADDR, enum minimal_symbol_type, |
576 | struct objfile *)); | |
35f5886e | 577 | |
95ff889e FF |
578 | static void |
579 | set_cu_language PARAMS ((struct dieinfo *)); | |
580 | ||
bf229b4e FF |
581 | static struct type * |
582 | dwarf_fundamental_type PARAMS ((struct objfile *, int)); | |
583 | ||
584 | ||
585 | /* | |
586 | ||
587 | LOCAL FUNCTION | |
588 | ||
589 | dwarf_fundamental_type -- lookup or create a fundamental type | |
590 | ||
591 | SYNOPSIS | |
592 | ||
593 | struct type * | |
594 | dwarf_fundamental_type (struct objfile *objfile, int typeid) | |
595 | ||
596 | DESCRIPTION | |
597 | ||
598 | DWARF version 1 doesn't supply any fundamental type information, | |
599 | so gdb has to construct such types. It has a fixed number of | |
600 | fundamental types that it knows how to construct, which is the | |
601 | union of all types that it knows how to construct for all languages | |
602 | that it knows about. These are enumerated in gdbtypes.h. | |
603 | ||
604 | As an example, assume we find a DIE that references a DWARF | |
605 | fundamental type of FT_integer. We first look in the ftypes | |
606 | array to see if we already have such a type, indexed by the | |
607 | gdb internal value of FT_INTEGER. If so, we simply return a | |
608 | pointer to that type. If not, then we ask an appropriate | |
609 | language dependent routine to create a type FT_INTEGER, using | |
610 | defaults reasonable for the current target machine, and install | |
611 | that type in ftypes for future reference. | |
612 | ||
613 | RETURNS | |
614 | ||
615 | Pointer to a fundamental type. | |
616 | ||
617 | */ | |
618 | ||
619 | static struct type * | |
620 | dwarf_fundamental_type (objfile, typeid) | |
621 | struct objfile *objfile; | |
622 | int typeid; | |
623 | { | |
624 | if (typeid < 0 || typeid >= FT_NUM_MEMBERS) | |
625 | { | |
626 | error ("internal error - invalid fundamental type id %d", typeid); | |
627 | } | |
628 | ||
629 | /* Look for this particular type in the fundamental type vector. If one is | |
630 | not found, create and install one appropriate for the current language | |
631 | and the current target machine. */ | |
632 | ||
633 | if (ftypes[typeid] == NULL) | |
634 | { | |
635 | ftypes[typeid] = cu_language_defn -> la_fund_type(objfile, typeid); | |
636 | } | |
637 | ||
638 | return (ftypes[typeid]); | |
639 | } | |
640 | ||
95ff889e FF |
641 | /* |
642 | ||
643 | LOCAL FUNCTION | |
644 | ||
645 | set_cu_language -- set local copy of language for compilation unit | |
646 | ||
647 | SYNOPSIS | |
648 | ||
649 | void | |
650 | set_cu_language (struct dieinfo *dip) | |
651 | ||
652 | DESCRIPTION | |
653 | ||
654 | Decode the language attribute for a compilation unit DIE and | |
655 | remember what the language was. We use this at various times | |
656 | when processing DIE's for a given compilation unit. | |
657 | ||
658 | RETURNS | |
659 | ||
660 | No return value. | |
661 | ||
662 | */ | |
663 | ||
664 | static void | |
665 | set_cu_language (dip) | |
666 | struct dieinfo *dip; | |
667 | { | |
668 | switch (dip -> at_language) | |
669 | { | |
670 | case LANG_C89: | |
671 | case LANG_C: | |
672 | cu_language = language_c; | |
673 | break; | |
674 | case LANG_C_PLUS_PLUS: | |
675 | cu_language = language_cplus; | |
676 | break; | |
19cfe25d | 677 | /* start-sanitize-chill */ |
e58de8a2 FF |
678 | case LANG_CHILL: |
679 | cu_language = language_chill; | |
680 | break; | |
19cfe25d | 681 | /* end-sanitize-chill */ |
e58de8a2 FF |
682 | case LANG_MODULA2: |
683 | cu_language = language_m2; | |
684 | break; | |
95ff889e FF |
685 | case LANG_ADA83: |
686 | case LANG_COBOL74: | |
687 | case LANG_COBOL85: | |
688 | case LANG_FORTRAN77: | |
689 | case LANG_FORTRAN90: | |
690 | case LANG_PASCAL83: | |
2e4964ad | 691 | /* We don't know anything special about these yet. */ |
95ff889e FF |
692 | cu_language = language_unknown; |
693 | break; | |
2e4964ad FF |
694 | default: |
695 | /* If no at_language, try to deduce one from the filename */ | |
696 | cu_language = deduce_language_from_filename (dip -> at_name); | |
697 | break; | |
95ff889e | 698 | } |
bf229b4e | 699 | cu_language_defn = language_def (cu_language); |
95ff889e FF |
700 | } |
701 | ||
35f5886e FF |
702 | /* |
703 | ||
704 | GLOBAL FUNCTION | |
705 | ||
706 | dwarf_build_psymtabs -- build partial symtabs from DWARF debug info | |
707 | ||
708 | SYNOPSIS | |
709 | ||
d5931d79 | 710 | void dwarf_build_psymtabs (struct objfile *objfile, |
2670f34d | 711 | struct section_offsets *section_offsets, |
d5931d79 JG |
712 | int mainline, file_ptr dbfoff, unsigned int dbfsize, |
713 | file_ptr lnoffset, unsigned int lnsize) | |
35f5886e FF |
714 | |
715 | DESCRIPTION | |
716 | ||
717 | This function is called upon to build partial symtabs from files | |
718 | containing DIE's (Dwarf Information Entries) and DWARF line numbers. | |
719 | ||
d5931d79 | 720 | It is passed a bfd* containing the DIES |
35f5886e FF |
721 | and line number information, the corresponding filename for that |
722 | file, a base address for relocating the symbols, a flag indicating | |
723 | whether or not this debugging information is from a "main symbol | |
724 | table" rather than a shared library or dynamically linked file, | |
725 | and file offset/size pairs for the DIE information and line number | |
726 | information. | |
727 | ||
728 | RETURNS | |
729 | ||
730 | No return value. | |
731 | ||
732 | */ | |
733 | ||
734 | void | |
d5931d79 JG |
735 | dwarf_build_psymtabs (objfile, section_offsets, mainline, dbfoff, dbfsize, |
736 | lnoffset, lnsize) | |
737 | struct objfile *objfile; | |
2670f34d | 738 | struct section_offsets *section_offsets; |
1ab3bf1b | 739 | int mainline; |
d5931d79 | 740 | file_ptr dbfoff; |
4090fe1c | 741 | unsigned int dbfsize; |
d5931d79 | 742 | file_ptr lnoffset; |
1ab3bf1b | 743 | unsigned int lnsize; |
35f5886e | 744 | { |
d5931d79 | 745 | bfd *abfd = objfile->obfd; |
35f5886e FF |
746 | struct cleanup *back_to; |
747 | ||
95967e73 | 748 | current_objfile = objfile; |
4090fe1c | 749 | dbsize = dbfsize; |
35f5886e FF |
750 | dbbase = xmalloc (dbsize); |
751 | dbroff = 0; | |
d5931d79 JG |
752 | if ((bfd_seek (abfd, dbfoff, L_SET) != 0) || |
753 | (bfd_read (dbbase, dbsize, 1, abfd) != dbsize)) | |
35f5886e FF |
754 | { |
755 | free (dbbase); | |
d5931d79 | 756 | error ("can't read DWARF data from '%s'", bfd_get_filename (abfd)); |
35f5886e FF |
757 | } |
758 | back_to = make_cleanup (free, dbbase); | |
759 | ||
760 | /* If we are reinitializing, or if we have never loaded syms yet, init. | |
761 | Since we have no idea how many DIES we are looking at, we just guess | |
762 | some arbitrary value. */ | |
763 | ||
13b5a7ff FF |
764 | if (mainline || objfile -> global_psymbols.size == 0 || |
765 | objfile -> static_psymbols.size == 0) | |
35f5886e | 766 | { |
1ab3bf1b | 767 | init_psymbol_list (objfile, 1024); |
35f5886e FF |
768 | } |
769 | ||
84ffdec2 | 770 | /* Save the relocation factor where everybody can see it. */ |
f8b76e70 | 771 | |
2670f34d JG |
772 | base_section_offsets = section_offsets; |
773 | baseaddr = ANOFFSET (section_offsets, 0); | |
f8b76e70 | 774 | |
35f5886e FF |
775 | /* Follow the compilation unit sibling chain, building a partial symbol |
776 | table entry for each one. Save enough information about each compilation | |
777 | unit to locate the full DWARF information later. */ | |
778 | ||
d5931d79 | 779 | scan_compilation_units (dbbase, dbbase + dbsize, dbfoff, lnoffset, objfile); |
35f5886e | 780 | |
35f5886e | 781 | do_cleanups (back_to); |
95967e73 | 782 | current_objfile = NULL; |
35f5886e FF |
783 | } |
784 | ||
785 | ||
786 | /* | |
787 | ||
788 | LOCAL FUNCTION | |
789 | ||
1ab3bf1b | 790 | record_minimal_symbol -- add entry to gdb's minimal symbol table |
35f5886e FF |
791 | |
792 | SYNOPSIS | |
793 | ||
1ab3bf1b JG |
794 | static void record_minimal_symbol (char *name, CORE_ADDR address, |
795 | enum minimal_symbol_type ms_type, | |
796 | struct objfile *objfile) | |
35f5886e FF |
797 | |
798 | DESCRIPTION | |
799 | ||
800 | Given a pointer to the name of a symbol that should be added to the | |
1ab3bf1b | 801 | minimal symbol table, and the address associated with that |
35f5886e | 802 | symbol, records this information for later use in building the |
1ab3bf1b | 803 | minimal symbol table. |
35f5886e | 804 | |
35f5886e FF |
805 | */ |
806 | ||
807 | static void | |
1ab3bf1b JG |
808 | record_minimal_symbol (name, address, ms_type, objfile) |
809 | char *name; | |
810 | CORE_ADDR address; | |
811 | enum minimal_symbol_type ms_type; | |
812 | struct objfile *objfile; | |
35f5886e | 813 | { |
1ab3bf1b JG |
814 | name = obsavestring (name, strlen (name), &objfile -> symbol_obstack); |
815 | prim_record_minimal_symbol (name, address, ms_type); | |
35f5886e FF |
816 | } |
817 | ||
818 | /* | |
819 | ||
35f5886e FF |
820 | LOCAL FUNCTION |
821 | ||
822 | read_lexical_block_scope -- process all dies in a lexical block | |
823 | ||
824 | SYNOPSIS | |
825 | ||
826 | static void read_lexical_block_scope (struct dieinfo *dip, | |
827 | char *thisdie, char *enddie) | |
828 | ||
829 | DESCRIPTION | |
830 | ||
831 | Process all the DIES contained within a lexical block scope. | |
832 | Start a new scope, process the dies, and then close the scope. | |
833 | ||
834 | */ | |
835 | ||
836 | static void | |
1ab3bf1b JG |
837 | read_lexical_block_scope (dip, thisdie, enddie, objfile) |
838 | struct dieinfo *dip; | |
839 | char *thisdie; | |
840 | char *enddie; | |
841 | struct objfile *objfile; | |
35f5886e | 842 | { |
4d315a07 FF |
843 | register struct context_stack *new; |
844 | ||
4ed3a9ea | 845 | push_context (0, dip -> at_low_pc); |
13b5a7ff | 846 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 FF |
847 | new = pop_context (); |
848 | if (local_symbols != NULL) | |
849 | { | |
850 | finish_block (0, &local_symbols, new -> old_blocks, new -> start_addr, | |
1ab3bf1b | 851 | dip -> at_high_pc, objfile); |
4d315a07 FF |
852 | } |
853 | local_symbols = new -> locals; | |
35f5886e FF |
854 | } |
855 | ||
856 | /* | |
857 | ||
858 | LOCAL FUNCTION | |
859 | ||
860 | lookup_utype -- look up a user defined type from die reference | |
861 | ||
862 | SYNOPSIS | |
863 | ||
13b5a7ff | 864 | static type *lookup_utype (DIE_REF die_ref) |
35f5886e FF |
865 | |
866 | DESCRIPTION | |
867 | ||
868 | Given a DIE reference, lookup the user defined type associated with | |
869 | that DIE, if it has been registered already. If not registered, then | |
870 | return NULL. Alloc_utype() can be called to register an empty | |
871 | type for this reference, which will be filled in later when the | |
872 | actual referenced DIE is processed. | |
873 | */ | |
874 | ||
875 | static struct type * | |
13b5a7ff FF |
876 | lookup_utype (die_ref) |
877 | DIE_REF die_ref; | |
35f5886e FF |
878 | { |
879 | struct type *type = NULL; | |
880 | int utypeidx; | |
881 | ||
13b5a7ff | 882 | utypeidx = (die_ref - dbroff) / 4; |
35f5886e FF |
883 | if ((utypeidx < 0) || (utypeidx >= numutypes)) |
884 | { | |
51b80b00 | 885 | complain (&bad_die_ref, DIE_ID, DIE_NAME); |
35f5886e FF |
886 | } |
887 | else | |
888 | { | |
889 | type = *(utypes + utypeidx); | |
890 | } | |
891 | return (type); | |
892 | } | |
893 | ||
894 | ||
895 | /* | |
896 | ||
897 | LOCAL FUNCTION | |
898 | ||
899 | alloc_utype -- add a user defined type for die reference | |
900 | ||
901 | SYNOPSIS | |
902 | ||
13b5a7ff | 903 | static type *alloc_utype (DIE_REF die_ref, struct type *utypep) |
35f5886e FF |
904 | |
905 | DESCRIPTION | |
906 | ||
13b5a7ff | 907 | Given a die reference DIE_REF, and a possible pointer to a user |
35f5886e FF |
908 | defined type UTYPEP, register that this reference has a user |
909 | defined type and either use the specified type in UTYPEP or | |
910 | make a new empty type that will be filled in later. | |
911 | ||
912 | We should only be called after calling lookup_utype() to verify that | |
13b5a7ff | 913 | there is not currently a type registered for DIE_REF. |
35f5886e FF |
914 | */ |
915 | ||
916 | static struct type * | |
13b5a7ff FF |
917 | alloc_utype (die_ref, utypep) |
918 | DIE_REF die_ref; | |
1ab3bf1b | 919 | struct type *utypep; |
35f5886e FF |
920 | { |
921 | struct type **typep; | |
922 | int utypeidx; | |
923 | ||
13b5a7ff | 924 | utypeidx = (die_ref - dbroff) / 4; |
35f5886e FF |
925 | typep = utypes + utypeidx; |
926 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
927 | { | |
bf229b4e | 928 | utypep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
51b80b00 | 929 | complain (&bad_die_ref, DIE_ID, DIE_NAME); |
35f5886e FF |
930 | } |
931 | else if (*typep != NULL) | |
932 | { | |
933 | utypep = *typep; | |
51b80b00 | 934 | complain (&dup_user_type_allocation, DIE_ID, DIE_NAME); |
35f5886e FF |
935 | } |
936 | else | |
937 | { | |
938 | if (utypep == NULL) | |
939 | { | |
8050a57b | 940 | utypep = alloc_type (current_objfile); |
35f5886e FF |
941 | } |
942 | *typep = utypep; | |
943 | } | |
944 | return (utypep); | |
945 | } | |
946 | ||
947 | /* | |
948 | ||
949 | LOCAL FUNCTION | |
950 | ||
951 | decode_die_type -- return a type for a specified die | |
952 | ||
953 | SYNOPSIS | |
954 | ||
955 | static struct type *decode_die_type (struct dieinfo *dip) | |
956 | ||
957 | DESCRIPTION | |
958 | ||
959 | Given a pointer to a die information structure DIP, decode the | |
960 | type of the die and return a pointer to the decoded type. All | |
961 | dies without specific types default to type int. | |
962 | */ | |
963 | ||
964 | static struct type * | |
1ab3bf1b JG |
965 | decode_die_type (dip) |
966 | struct dieinfo *dip; | |
35f5886e FF |
967 | { |
968 | struct type *type = NULL; | |
969 | ||
970 | if (dip -> at_fund_type != 0) | |
971 | { | |
972 | type = decode_fund_type (dip -> at_fund_type); | |
973 | } | |
974 | else if (dip -> at_mod_fund_type != NULL) | |
975 | { | |
976 | type = decode_mod_fund_type (dip -> at_mod_fund_type); | |
977 | } | |
978 | else if (dip -> at_user_def_type) | |
979 | { | |
980 | if ((type = lookup_utype (dip -> at_user_def_type)) == NULL) | |
981 | { | |
982 | type = alloc_utype (dip -> at_user_def_type, NULL); | |
983 | } | |
984 | } | |
985 | else if (dip -> at_mod_u_d_type) | |
986 | { | |
987 | type = decode_mod_u_d_type (dip -> at_mod_u_d_type); | |
988 | } | |
989 | else | |
990 | { | |
bf229b4e | 991 | type = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
35f5886e FF |
992 | } |
993 | return (type); | |
994 | } | |
995 | ||
996 | /* | |
997 | ||
998 | LOCAL FUNCTION | |
999 | ||
1000 | struct_type -- compute and return the type for a struct or union | |
1001 | ||
1002 | SYNOPSIS | |
1003 | ||
1004 | static struct type *struct_type (struct dieinfo *dip, char *thisdie, | |
8b5b6fae | 1005 | char *enddie, struct objfile *objfile) |
35f5886e FF |
1006 | |
1007 | DESCRIPTION | |
1008 | ||
1009 | Given pointer to a die information structure for a die which | |
715cafcb FF |
1010 | defines a union or structure (and MUST define one or the other), |
1011 | and pointers to the raw die data that define the range of dies which | |
1012 | define the members, compute and return the user defined type for the | |
1013 | structure or union. | |
35f5886e FF |
1014 | */ |
1015 | ||
1016 | static struct type * | |
1ab3bf1b JG |
1017 | struct_type (dip, thisdie, enddie, objfile) |
1018 | struct dieinfo *dip; | |
1019 | char *thisdie; | |
1020 | char *enddie; | |
1021 | struct objfile *objfile; | |
35f5886e FF |
1022 | { |
1023 | struct type *type; | |
1024 | struct nextfield { | |
1025 | struct nextfield *next; | |
1026 | struct field field; | |
1027 | }; | |
1028 | struct nextfield *list = NULL; | |
1029 | struct nextfield *new; | |
1030 | int nfields = 0; | |
1031 | int n; | |
1032 | char *tpart1; | |
35f5886e | 1033 | struct dieinfo mbr; |
8b5b6fae | 1034 | char *nextdie; |
a8a69e63 | 1035 | #if !BITS_BIG_ENDIAN |
50055e94 | 1036 | int anonymous_size; |
a8a69e63 | 1037 | #endif |
35f5886e | 1038 | |
13b5a7ff | 1039 | if ((type = lookup_utype (dip -> die_ref)) == NULL) |
35f5886e | 1040 | { |
5edf98d7 | 1041 | /* No forward references created an empty type, so install one now */ |
13b5a7ff | 1042 | type = alloc_utype (dip -> die_ref, NULL); |
35f5886e | 1043 | } |
a3723a43 | 1044 | INIT_CPLUS_SPECIFIC(type); |
13b5a7ff | 1045 | switch (dip -> die_tag) |
35f5886e | 1046 | { |
95ff889e FF |
1047 | case TAG_class_type: |
1048 | TYPE_CODE (type) = TYPE_CODE_CLASS; | |
1049 | tpart1 = "class"; | |
1050 | break; | |
715cafcb | 1051 | case TAG_structure_type: |
5edf98d7 | 1052 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
715cafcb FF |
1053 | tpart1 = "struct"; |
1054 | break; | |
1055 | case TAG_union_type: | |
1056 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
1057 | tpart1 = "union"; | |
1058 | break; | |
1059 | default: | |
1060 | /* Should never happen */ | |
1061 | TYPE_CODE (type) = TYPE_CODE_UNDEF; | |
1062 | tpart1 = "???"; | |
51b80b00 | 1063 | complain (&missing_tag, DIE_ID, DIE_NAME); |
715cafcb | 1064 | break; |
35f5886e | 1065 | } |
5edf98d7 FF |
1066 | /* Some compilers try to be helpful by inventing "fake" names for |
1067 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1068 | Thanks, but no thanks... */ | |
715cafcb FF |
1069 | if (dip -> at_name != NULL |
1070 | && *dip -> at_name != '~' | |
1071 | && *dip -> at_name != '.') | |
35f5886e | 1072 | { |
95967e73 | 1073 | TYPE_NAME (type) = obconcat (&objfile -> type_obstack, |
1ab3bf1b | 1074 | tpart1, " ", dip -> at_name); |
35f5886e | 1075 | } |
50055e94 FF |
1076 | /* Use whatever size is known. Zero is a valid size. We might however |
1077 | wish to check has_at_byte_size to make sure that some byte size was | |
1078 | given explicitly, but DWARF doesn't specify that explicit sizes of | |
1079 | zero have to present, so complaining about missing sizes should | |
1080 | probably not be the default. */ | |
1081 | TYPE_LENGTH (type) = dip -> at_byte_size; | |
13b5a7ff | 1082 | thisdie += dip -> die_length; |
35f5886e FF |
1083 | while (thisdie < enddie) |
1084 | { | |
95967e73 FF |
1085 | basicdieinfo (&mbr, thisdie, objfile); |
1086 | completedieinfo (&mbr, objfile); | |
13b5a7ff | 1087 | if (mbr.die_length <= SIZEOF_DIE_LENGTH) |
35f5886e FF |
1088 | { |
1089 | break; | |
1090 | } | |
8b5b6fae FF |
1091 | else if (mbr.at_sibling != 0) |
1092 | { | |
1093 | nextdie = dbbase + mbr.at_sibling - dbroff; | |
1094 | } | |
1095 | else | |
1096 | { | |
13b5a7ff | 1097 | nextdie = thisdie + mbr.die_length; |
8b5b6fae | 1098 | } |
13b5a7ff | 1099 | switch (mbr.die_tag) |
35f5886e FF |
1100 | { |
1101 | case TAG_member: | |
1102 | /* Get space to record the next field's data. */ | |
1103 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1104 | new -> next = list; | |
1105 | list = new; | |
1106 | /* Save the data. */ | |
50e0dc41 FF |
1107 | list -> field.name = |
1108 | obsavestring (mbr.at_name, strlen (mbr.at_name), | |
1109 | &objfile -> type_obstack); | |
35f5886e FF |
1110 | list -> field.type = decode_die_type (&mbr); |
1111 | list -> field.bitpos = 8 * locval (mbr.at_location); | |
4db8e515 FF |
1112 | /* Handle bit fields. */ |
1113 | list -> field.bitsize = mbr.at_bit_size; | |
1114 | #if BITS_BIG_ENDIAN | |
1115 | /* For big endian bits, the at_bit_offset gives the additional | |
1116 | bit offset from the MSB of the containing anonymous object to | |
1117 | the MSB of the field. We don't have to do anything special | |
1118 | since we don't need to know the size of the anonymous object. */ | |
1119 | list -> field.bitpos += mbr.at_bit_offset; | |
1120 | #else | |
1121 | /* For little endian bits, we need to have a non-zero at_bit_size, | |
1122 | so that we know we are in fact dealing with a bitfield. Compute | |
1123 | the bit offset to the MSB of the anonymous object, subtract off | |
1124 | the number of bits from the MSB of the field to the MSB of the | |
1125 | object, and then subtract off the number of bits of the field | |
1126 | itself. The result is the bit offset of the LSB of the field. */ | |
1127 | if (mbr.at_bit_size > 0) | |
1128 | { | |
50055e94 FF |
1129 | if (mbr.has_at_byte_size) |
1130 | { | |
1131 | /* The size of the anonymous object containing the bit field | |
1132 | is explicit, so use the indicated size (in bytes). */ | |
1133 | anonymous_size = mbr.at_byte_size; | |
1134 | } | |
1135 | else | |
1136 | { | |
1137 | /* The size of the anonymous object containing the bit field | |
1138 | matches the size of an object of the bit field's type. | |
1139 | DWARF allows at_byte_size to be left out in such cases, | |
1140 | as a debug information size optimization. */ | |
1141 | anonymous_size = TYPE_LENGTH (list -> field.type); | |
1142 | } | |
4db8e515 | 1143 | list -> field.bitpos += |
50055e94 | 1144 | anonymous_size * 8 - mbr.at_bit_offset - mbr.at_bit_size; |
4db8e515 FF |
1145 | } |
1146 | #endif | |
35f5886e FF |
1147 | nfields++; |
1148 | break; | |
1149 | default: | |
8b5b6fae | 1150 | process_dies (thisdie, nextdie, objfile); |
35f5886e FF |
1151 | break; |
1152 | } | |
8b5b6fae | 1153 | thisdie = nextdie; |
35f5886e | 1154 | } |
5edf98d7 FF |
1155 | /* Now create the vector of fields, and record how big it is. We may |
1156 | not even have any fields, if this DIE was generated due to a reference | |
1157 | to an anonymous structure or union. In this case, TYPE_FLAG_STUB is | |
1158 | set, which clues gdb in to the fact that it needs to search elsewhere | |
1159 | for the full structure definition. */ | |
1160 | if (nfields == 0) | |
35f5886e | 1161 | { |
5edf98d7 FF |
1162 | TYPE_FLAGS (type) |= TYPE_FLAG_STUB; |
1163 | } | |
1164 | else | |
1165 | { | |
1166 | TYPE_NFIELDS (type) = nfields; | |
1167 | TYPE_FIELDS (type) = (struct field *) | |
dac9734e | 1168 | TYPE_ALLOC (type, sizeof (struct field) * nfields); |
5edf98d7 FF |
1169 | /* Copy the saved-up fields into the field vector. */ |
1170 | for (n = nfields; list; list = list -> next) | |
1171 | { | |
1172 | TYPE_FIELD (type, --n) = list -> field; | |
1173 | } | |
1174 | } | |
35f5886e FF |
1175 | return (type); |
1176 | } | |
1177 | ||
1178 | /* | |
1179 | ||
1180 | LOCAL FUNCTION | |
1181 | ||
1182 | read_structure_scope -- process all dies within struct or union | |
1183 | ||
1184 | SYNOPSIS | |
1185 | ||
1186 | static void read_structure_scope (struct dieinfo *dip, | |
8b5b6fae | 1187 | char *thisdie, char *enddie, struct objfile *objfile) |
35f5886e FF |
1188 | |
1189 | DESCRIPTION | |
1190 | ||
1191 | Called when we find the DIE that starts a structure or union | |
1192 | scope (definition) to process all dies that define the members | |
1193 | of the structure or union. DIP is a pointer to the die info | |
1194 | struct for the DIE that names the structure or union. | |
1195 | ||
1196 | NOTES | |
1197 | ||
1198 | Note that we need to call struct_type regardless of whether or not | |
84ce6717 FF |
1199 | the DIE has an at_name attribute, since it might be an anonymous |
1200 | structure or union. This gets the type entered into our set of | |
1201 | user defined types. | |
1202 | ||
1203 | However, if the structure is incomplete (an opaque struct/union) | |
1204 | then suppress creating a symbol table entry for it since gdb only | |
1205 | wants to find the one with the complete definition. Note that if | |
1206 | it is complete, we just call new_symbol, which does it's own | |
1207 | checking about whether the struct/union is anonymous or not (and | |
1208 | suppresses creating a symbol table entry itself). | |
1209 | ||
35f5886e FF |
1210 | */ |
1211 | ||
1212 | static void | |
1ab3bf1b JG |
1213 | read_structure_scope (dip, thisdie, enddie, objfile) |
1214 | struct dieinfo *dip; | |
1215 | char *thisdie; | |
1216 | char *enddie; | |
1217 | struct objfile *objfile; | |
35f5886e FF |
1218 | { |
1219 | struct type *type; | |
1220 | struct symbol *sym; | |
1221 | ||
8b5b6fae | 1222 | type = struct_type (dip, thisdie, enddie, objfile); |
84ce6717 | 1223 | if (!(TYPE_FLAGS (type) & TYPE_FLAG_STUB)) |
35f5886e | 1224 | { |
95ff889e FF |
1225 | sym = new_symbol (dip, objfile); |
1226 | if (sym != NULL) | |
84ce6717 FF |
1227 | { |
1228 | SYMBOL_TYPE (sym) = type; | |
95ff889e FF |
1229 | if (cu_language == language_cplus) |
1230 | { | |
1231 | synthesize_typedef (dip, objfile, type); | |
1232 | } | |
84ce6717 | 1233 | } |
35f5886e FF |
1234 | } |
1235 | } | |
1236 | ||
1237 | /* | |
1238 | ||
1239 | LOCAL FUNCTION | |
1240 | ||
1241 | decode_array_element_type -- decode type of the array elements | |
1242 | ||
1243 | SYNOPSIS | |
1244 | ||
1245 | static struct type *decode_array_element_type (char *scan, char *end) | |
1246 | ||
1247 | DESCRIPTION | |
1248 | ||
1249 | As the last step in decoding the array subscript information for an | |
1250 | array DIE, we need to decode the type of the array elements. We are | |
1251 | passed a pointer to this last part of the subscript information and | |
1252 | must return the appropriate type. If the type attribute is not | |
1253 | recognized, just warn about the problem and return type int. | |
1254 | */ | |
1255 | ||
1256 | static struct type * | |
84ffdec2 | 1257 | decode_array_element_type (scan) |
1ab3bf1b | 1258 | char *scan; |
35f5886e FF |
1259 | { |
1260 | struct type *typep; | |
13b5a7ff FF |
1261 | DIE_REF die_ref; |
1262 | unsigned short attribute; | |
35f5886e | 1263 | unsigned short fundtype; |
13b5a7ff | 1264 | int nbytes; |
35f5886e | 1265 | |
13b5a7ff FF |
1266 | attribute = target_to_host (scan, SIZEOF_ATTRIBUTE, GET_UNSIGNED, |
1267 | current_objfile); | |
1268 | scan += SIZEOF_ATTRIBUTE; | |
1269 | if ((nbytes = attribute_size (attribute)) == -1) | |
1270 | { | |
51b80b00 | 1271 | complain (&bad_array_element_type, DIE_ID, DIE_NAME, attribute); |
bf229b4e | 1272 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff FF |
1273 | } |
1274 | else | |
1275 | { | |
1276 | switch (attribute) | |
1277 | { | |
1278 | case AT_fund_type: | |
1279 | fundtype = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1280 | current_objfile); | |
1281 | typep = decode_fund_type (fundtype); | |
1282 | break; | |
1283 | case AT_mod_fund_type: | |
1284 | typep = decode_mod_fund_type (scan); | |
1285 | break; | |
1286 | case AT_user_def_type: | |
1287 | die_ref = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1288 | current_objfile); | |
1289 | if ((typep = lookup_utype (die_ref)) == NULL) | |
1290 | { | |
1291 | typep = alloc_utype (die_ref, NULL); | |
1292 | } | |
1293 | break; | |
1294 | case AT_mod_u_d_type: | |
1295 | typep = decode_mod_u_d_type (scan); | |
1296 | break; | |
1297 | default: | |
51b80b00 | 1298 | complain (&bad_array_element_type, DIE_ID, DIE_NAME, attribute); |
bf229b4e | 1299 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff FF |
1300 | break; |
1301 | } | |
35f5886e FF |
1302 | } |
1303 | return (typep); | |
1304 | } | |
1305 | ||
1306 | /* | |
1307 | ||
1308 | LOCAL FUNCTION | |
1309 | ||
85f0a848 | 1310 | decode_subscript_data_item -- decode array subscript item |
35f5886e FF |
1311 | |
1312 | SYNOPSIS | |
1313 | ||
85f0a848 FF |
1314 | static struct type * |
1315 | decode_subscript_data_item (char *scan, char *end) | |
35f5886e FF |
1316 | |
1317 | DESCRIPTION | |
1318 | ||
1319 | The array subscripts and the data type of the elements of an | |
1320 | array are described by a list of data items, stored as a block | |
1321 | of contiguous bytes. There is a data item describing each array | |
1322 | dimension, and a final data item describing the element type. | |
1323 | The data items are ordered the same as their appearance in the | |
1324 | source (I.E. leftmost dimension first, next to leftmost second, | |
1325 | etc). | |
1326 | ||
85f0a848 FF |
1327 | The data items describing each array dimension consist of four |
1328 | parts: (1) a format specifier, (2) type type of the subscript | |
1329 | index, (3) a description of the low bound of the array dimension, | |
1330 | and (4) a description of the high bound of the array dimension. | |
1331 | ||
1332 | The last data item is the description of the type of each of | |
1333 | the array elements. | |
1334 | ||
35f5886e | 1335 | We are passed a pointer to the start of the block of bytes |
85f0a848 FF |
1336 | containing the remaining data items, and a pointer to the first |
1337 | byte past the data. This function recursively decodes the | |
1338 | remaining data items and returns a type. | |
1339 | ||
1340 | If we somehow fail to decode some data, we complain about it | |
1341 | and return a type "array of int". | |
35f5886e FF |
1342 | |
1343 | BUGS | |
1344 | FIXME: This code only implements the forms currently used | |
1345 | by the AT&T and GNU C compilers. | |
1346 | ||
1347 | The end pointer is supplied for error checking, maybe we should | |
1348 | use it for that... | |
1349 | */ | |
1350 | ||
1351 | static struct type * | |
85f0a848 | 1352 | decode_subscript_data_item (scan, end) |
1ab3bf1b JG |
1353 | char *scan; |
1354 | char *end; | |
35f5886e | 1355 | { |
85f0a848 FF |
1356 | struct type *typep = NULL; /* Array type we are building */ |
1357 | struct type *nexttype; /* Type of each element (may be array) */ | |
1358 | struct type *indextype; /* Type of this index */ | |
a8a69e63 | 1359 | struct type *rangetype; |
13b5a7ff FF |
1360 | unsigned int format; |
1361 | unsigned short fundtype; | |
1362 | unsigned long lowbound; | |
1363 | unsigned long highbound; | |
1364 | int nbytes; | |
35f5886e | 1365 | |
13b5a7ff FF |
1366 | format = target_to_host (scan, SIZEOF_FORMAT_SPECIFIER, GET_UNSIGNED, |
1367 | current_objfile); | |
1368 | scan += SIZEOF_FORMAT_SPECIFIER; | |
35f5886e FF |
1369 | switch (format) |
1370 | { | |
1371 | case FMT_ET: | |
84ffdec2 | 1372 | typep = decode_array_element_type (scan); |
35f5886e FF |
1373 | break; |
1374 | case FMT_FT_C_C: | |
13b5a7ff FF |
1375 | fundtype = target_to_host (scan, SIZEOF_FMT_FT, GET_UNSIGNED, |
1376 | current_objfile); | |
85f0a848 | 1377 | indextype = decode_fund_type (fundtype); |
13b5a7ff | 1378 | scan += SIZEOF_FMT_FT; |
160be0de FF |
1379 | nbytes = TARGET_FT_LONG_SIZE (current_objfile); |
1380 | lowbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1381 | scan += nbytes; | |
1382 | highbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1383 | scan += nbytes; | |
85f0a848 FF |
1384 | nexttype = decode_subscript_data_item (scan, end); |
1385 | if (nexttype == NULL) | |
35f5886e | 1386 | { |
85f0a848 | 1387 | /* Munged subscript data or other problem, fake it. */ |
51b80b00 | 1388 | complain (&subscript_data_items, DIE_ID, DIE_NAME); |
85f0a848 FF |
1389 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1390 | } | |
a8a69e63 FF |
1391 | rangetype = create_range_type ((struct type *) NULL, indextype, |
1392 | lowbound, highbound); | |
1393 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
35f5886e FF |
1394 | break; |
1395 | case FMT_FT_C_X: | |
1396 | case FMT_FT_X_C: | |
1397 | case FMT_FT_X_X: | |
1398 | case FMT_UT_C_C: | |
1399 | case FMT_UT_C_X: | |
1400 | case FMT_UT_X_C: | |
1401 | case FMT_UT_X_X: | |
51b80b00 | 1402 | complain (&unhandled_array_subscript_format, DIE_ID, DIE_NAME, format); |
a8a69e63 FF |
1403 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1404 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1405 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
35f5886e FF |
1406 | break; |
1407 | default: | |
51b80b00 | 1408 | complain (&unknown_array_subscript_format, DIE_ID, DIE_NAME, format); |
a8a69e63 FF |
1409 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1410 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1411 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
35f5886e FF |
1412 | break; |
1413 | } | |
1414 | return (typep); | |
1415 | } | |
1416 | ||
1417 | /* | |
1418 | ||
1419 | LOCAL FUNCTION | |
1420 | ||
4d315a07 | 1421 | dwarf_read_array_type -- read TAG_array_type DIE |
35f5886e FF |
1422 | |
1423 | SYNOPSIS | |
1424 | ||
4d315a07 | 1425 | static void dwarf_read_array_type (struct dieinfo *dip) |
35f5886e FF |
1426 | |
1427 | DESCRIPTION | |
1428 | ||
1429 | Extract all information from a TAG_array_type DIE and add to | |
1430 | the user defined type vector. | |
1431 | */ | |
1432 | ||
1433 | static void | |
1ab3bf1b JG |
1434 | dwarf_read_array_type (dip) |
1435 | struct dieinfo *dip; | |
35f5886e FF |
1436 | { |
1437 | struct type *type; | |
af213624 | 1438 | struct type *utype; |
35f5886e FF |
1439 | char *sub; |
1440 | char *subend; | |
13b5a7ff FF |
1441 | unsigned short blocksz; |
1442 | int nbytes; | |
35f5886e FF |
1443 | |
1444 | if (dip -> at_ordering != ORD_row_major) | |
1445 | { | |
1446 | /* FIXME: Can gdb even handle column major arrays? */ | |
51b80b00 | 1447 | complain (¬_row_major, DIE_ID, DIE_NAME); |
35f5886e FF |
1448 | } |
1449 | if ((sub = dip -> at_subscr_data) != NULL) | |
1450 | { | |
13b5a7ff FF |
1451 | nbytes = attribute_size (AT_subscr_data); |
1452 | blocksz = target_to_host (sub, nbytes, GET_UNSIGNED, current_objfile); | |
1453 | subend = sub + nbytes + blocksz; | |
1454 | sub += nbytes; | |
85f0a848 FF |
1455 | type = decode_subscript_data_item (sub, subend); |
1456 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) | |
35f5886e | 1457 | { |
85f0a848 FF |
1458 | /* Install user defined type that has not been referenced yet. */ |
1459 | alloc_utype (dip -> die_ref, type); | |
1460 | } | |
1461 | else if (TYPE_CODE (utype) == TYPE_CODE_UNDEF) | |
1462 | { | |
1463 | /* Ick! A forward ref has already generated a blank type in our | |
1464 | slot, and this type probably already has things pointing to it | |
1465 | (which is what caused it to be created in the first place). | |
1466 | If it's just a place holder we can plop our fully defined type | |
1467 | on top of it. We can't recover the space allocated for our | |
1468 | new type since it might be on an obstack, but we could reuse | |
1469 | it if we kept a list of them, but it might not be worth it | |
1470 | (FIXME). */ | |
1471 | *utype = *type; | |
35f5886e FF |
1472 | } |
1473 | else | |
1474 | { | |
85f0a848 FF |
1475 | /* Double ick! Not only is a type already in our slot, but |
1476 | someone has decorated it. Complain and leave it alone. */ | |
51b80b00 | 1477 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); |
35f5886e FF |
1478 | } |
1479 | } | |
1480 | } | |
1481 | ||
1482 | /* | |
1483 | ||
9e4c1921 FF |
1484 | LOCAL FUNCTION |
1485 | ||
1486 | read_tag_pointer_type -- read TAG_pointer_type DIE | |
1487 | ||
1488 | SYNOPSIS | |
1489 | ||
1490 | static void read_tag_pointer_type (struct dieinfo *dip) | |
1491 | ||
1492 | DESCRIPTION | |
1493 | ||
1494 | Extract all information from a TAG_pointer_type DIE and add to | |
1495 | the user defined type vector. | |
1496 | */ | |
1497 | ||
1498 | static void | |
1ab3bf1b JG |
1499 | read_tag_pointer_type (dip) |
1500 | struct dieinfo *dip; | |
9e4c1921 FF |
1501 | { |
1502 | struct type *type; | |
1503 | struct type *utype; | |
9e4c1921 FF |
1504 | |
1505 | type = decode_die_type (dip); | |
13b5a7ff | 1506 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) |
9e4c1921 FF |
1507 | { |
1508 | utype = lookup_pointer_type (type); | |
4ed3a9ea | 1509 | alloc_utype (dip -> die_ref, utype); |
9e4c1921 FF |
1510 | } |
1511 | else | |
1512 | { | |
1513 | TYPE_TARGET_TYPE (utype) = type; | |
1514 | TYPE_POINTER_TYPE (type) = utype; | |
1515 | ||
1516 | /* We assume the machine has only one representation for pointers! */ | |
1517 | /* FIXME: This confuses host<->target data representations, and is a | |
1518 | poor assumption besides. */ | |
1519 | ||
1520 | TYPE_LENGTH (utype) = sizeof (char *); | |
1521 | TYPE_CODE (utype) = TYPE_CODE_PTR; | |
1522 | } | |
1523 | } | |
1524 | ||
1525 | /* | |
1526 | ||
35f5886e FF |
1527 | LOCAL FUNCTION |
1528 | ||
1529 | read_subroutine_type -- process TAG_subroutine_type dies | |
1530 | ||
1531 | SYNOPSIS | |
1532 | ||
1533 | static void read_subroutine_type (struct dieinfo *dip, char thisdie, | |
1534 | char *enddie) | |
1535 | ||
1536 | DESCRIPTION | |
1537 | ||
1538 | Handle DIES due to C code like: | |
1539 | ||
1540 | struct foo { | |
1541 | int (*funcp)(int a, long l); (Generates TAG_subroutine_type DIE) | |
1542 | int b; | |
1543 | }; | |
1544 | ||
1545 | NOTES | |
1546 | ||
1547 | The parameter DIES are currently ignored. See if gdb has a way to | |
1548 | include this info in it's type system, and decode them if so. Is | |
1549 | this what the type structure's "arg_types" field is for? (FIXME) | |
1550 | */ | |
1551 | ||
1552 | static void | |
1ab3bf1b JG |
1553 | read_subroutine_type (dip, thisdie, enddie) |
1554 | struct dieinfo *dip; | |
1555 | char *thisdie; | |
1556 | char *enddie; | |
35f5886e | 1557 | { |
af213624 FF |
1558 | struct type *type; /* Type that this function returns */ |
1559 | struct type *ftype; /* Function that returns above type */ | |
35f5886e | 1560 | |
af213624 FF |
1561 | /* Decode the type that this subroutine returns */ |
1562 | ||
35f5886e | 1563 | type = decode_die_type (dip); |
af213624 FF |
1564 | |
1565 | /* Check to see if we already have a partially constructed user | |
1566 | defined type for this DIE, from a forward reference. */ | |
1567 | ||
13b5a7ff | 1568 | if ((ftype = lookup_utype (dip -> die_ref)) == NULL) |
af213624 FF |
1569 | { |
1570 | /* This is the first reference to one of these types. Make | |
1571 | a new one and place it in the user defined types. */ | |
1572 | ftype = lookup_function_type (type); | |
4ed3a9ea | 1573 | alloc_utype (dip -> die_ref, ftype); |
af213624 | 1574 | } |
85f0a848 | 1575 | else if (TYPE_CODE (ftype) == TYPE_CODE_UNDEF) |
af213624 FF |
1576 | { |
1577 | /* We have an existing partially constructed type, so bash it | |
1578 | into the correct type. */ | |
1579 | TYPE_TARGET_TYPE (ftype) = type; | |
1580 | TYPE_FUNCTION_TYPE (type) = ftype; | |
1581 | TYPE_LENGTH (ftype) = 1; | |
1582 | TYPE_CODE (ftype) = TYPE_CODE_FUNC; | |
1583 | } | |
85f0a848 FF |
1584 | else |
1585 | { | |
51b80b00 | 1586 | complain (&dup_user_type_definition, DIE_ID, DIE_NAME); |
85f0a848 | 1587 | } |
35f5886e FF |
1588 | } |
1589 | ||
1590 | /* | |
1591 | ||
1592 | LOCAL FUNCTION | |
1593 | ||
1594 | read_enumeration -- process dies which define an enumeration | |
1595 | ||
1596 | SYNOPSIS | |
1597 | ||
1598 | static void read_enumeration (struct dieinfo *dip, char *thisdie, | |
1ab3bf1b | 1599 | char *enddie, struct objfile *objfile) |
35f5886e FF |
1600 | |
1601 | DESCRIPTION | |
1602 | ||
1603 | Given a pointer to a die which begins an enumeration, process all | |
1604 | the dies that define the members of the enumeration. | |
1605 | ||
1606 | NOTES | |
1607 | ||
1608 | Note that we need to call enum_type regardless of whether or not we | |
1609 | have a symbol, since we might have an enum without a tag name (thus | |
1610 | no symbol for the tagname). | |
1611 | */ | |
1612 | ||
1613 | static void | |
1ab3bf1b JG |
1614 | read_enumeration (dip, thisdie, enddie, objfile) |
1615 | struct dieinfo *dip; | |
1616 | char *thisdie; | |
1617 | char *enddie; | |
1618 | struct objfile *objfile; | |
35f5886e FF |
1619 | { |
1620 | struct type *type; | |
1621 | struct symbol *sym; | |
1622 | ||
1ab3bf1b | 1623 | type = enum_type (dip, objfile); |
95ff889e FF |
1624 | sym = new_symbol (dip, objfile); |
1625 | if (sym != NULL) | |
35f5886e FF |
1626 | { |
1627 | SYMBOL_TYPE (sym) = type; | |
95ff889e FF |
1628 | if (cu_language == language_cplus) |
1629 | { | |
1630 | synthesize_typedef (dip, objfile, type); | |
1631 | } | |
35f5886e FF |
1632 | } |
1633 | } | |
1634 | ||
1635 | /* | |
1636 | ||
1637 | LOCAL FUNCTION | |
1638 | ||
1639 | enum_type -- decode and return a type for an enumeration | |
1640 | ||
1641 | SYNOPSIS | |
1642 | ||
1ab3bf1b | 1643 | static type *enum_type (struct dieinfo *dip, struct objfile *objfile) |
35f5886e FF |
1644 | |
1645 | DESCRIPTION | |
1646 | ||
1647 | Given a pointer to a die information structure for the die which | |
1648 | starts an enumeration, process all the dies that define the members | |
1649 | of the enumeration and return a type pointer for the enumeration. | |
98618bf7 | 1650 | |
715cafcb FF |
1651 | At the same time, for each member of the enumeration, create a |
1652 | symbol for it with namespace VAR_NAMESPACE and class LOC_CONST, | |
1653 | and give it the type of the enumeration itself. | |
1654 | ||
1655 | NOTES | |
1656 | ||
98618bf7 FF |
1657 | Note that the DWARF specification explicitly mandates that enum |
1658 | constants occur in reverse order from the source program order, | |
1659 | for "consistency" and because this ordering is easier for many | |
1ab3bf1b | 1660 | compilers to generate. (Draft 6, sec 3.8.5, Enumeration type |
715cafcb FF |
1661 | Entries). Because gdb wants to see the enum members in program |
1662 | source order, we have to ensure that the order gets reversed while | |
98618bf7 | 1663 | we are processing them. |
35f5886e FF |
1664 | */ |
1665 | ||
1666 | static struct type * | |
1ab3bf1b JG |
1667 | enum_type (dip, objfile) |
1668 | struct dieinfo *dip; | |
1669 | struct objfile *objfile; | |
35f5886e FF |
1670 | { |
1671 | struct type *type; | |
1672 | struct nextfield { | |
1673 | struct nextfield *next; | |
1674 | struct field field; | |
1675 | }; | |
1676 | struct nextfield *list = NULL; | |
1677 | struct nextfield *new; | |
1678 | int nfields = 0; | |
1679 | int n; | |
35f5886e FF |
1680 | char *scan; |
1681 | char *listend; | |
13b5a7ff | 1682 | unsigned short blocksz; |
715cafcb | 1683 | struct symbol *sym; |
13b5a7ff | 1684 | int nbytes; |
35f5886e | 1685 | |
13b5a7ff | 1686 | if ((type = lookup_utype (dip -> die_ref)) == NULL) |
35f5886e | 1687 | { |
84ce6717 | 1688 | /* No forward references created an empty type, so install one now */ |
13b5a7ff | 1689 | type = alloc_utype (dip -> die_ref, NULL); |
35f5886e FF |
1690 | } |
1691 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
84ce6717 FF |
1692 | /* Some compilers try to be helpful by inventing "fake" names for |
1693 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1694 | Thanks, but no thanks... */ | |
715cafcb FF |
1695 | if (dip -> at_name != NULL |
1696 | && *dip -> at_name != '~' | |
1697 | && *dip -> at_name != '.') | |
35f5886e | 1698 | { |
95967e73 | 1699 | TYPE_NAME (type) = obconcat (&objfile -> type_obstack, "enum", |
1ab3bf1b | 1700 | " ", dip -> at_name); |
35f5886e | 1701 | } |
715cafcb | 1702 | if (dip -> at_byte_size != 0) |
35f5886e FF |
1703 | { |
1704 | TYPE_LENGTH (type) = dip -> at_byte_size; | |
35f5886e | 1705 | } |
35f5886e FF |
1706 | if ((scan = dip -> at_element_list) != NULL) |
1707 | { | |
768be6e1 FF |
1708 | if (dip -> short_element_list) |
1709 | { | |
13b5a7ff | 1710 | nbytes = attribute_size (AT_short_element_list); |
768be6e1 FF |
1711 | } |
1712 | else | |
1713 | { | |
13b5a7ff | 1714 | nbytes = attribute_size (AT_element_list); |
768be6e1 | 1715 | } |
13b5a7ff FF |
1716 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); |
1717 | listend = scan + nbytes + blocksz; | |
1718 | scan += nbytes; | |
35f5886e FF |
1719 | while (scan < listend) |
1720 | { | |
1721 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1722 | new -> next = list; | |
1723 | list = new; | |
1724 | list -> field.type = NULL; | |
1725 | list -> field.bitsize = 0; | |
13b5a7ff FF |
1726 | list -> field.bitpos = |
1727 | target_to_host (scan, TARGET_FT_LONG_SIZE (objfile), GET_SIGNED, | |
1728 | objfile); | |
1729 | scan += TARGET_FT_LONG_SIZE (objfile); | |
50e0dc41 FF |
1730 | list -> field.name = obsavestring (scan, strlen (scan), |
1731 | &objfile -> type_obstack); | |
35f5886e FF |
1732 | scan += strlen (scan) + 1; |
1733 | nfields++; | |
715cafcb | 1734 | /* Handcraft a new symbol for this enum member. */ |
1ab3bf1b | 1735 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
715cafcb | 1736 | sizeof (struct symbol)); |
4ed3a9ea | 1737 | memset (sym, 0, sizeof (struct symbol)); |
13b5a7ff FF |
1738 | SYMBOL_NAME (sym) = create_name (list -> field.name, |
1739 | &objfile->symbol_obstack); | |
7532cf10 | 1740 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); |
715cafcb FF |
1741 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
1742 | SYMBOL_CLASS (sym) = LOC_CONST; | |
1743 | SYMBOL_TYPE (sym) = type; | |
1744 | SYMBOL_VALUE (sym) = list -> field.bitpos; | |
4d315a07 | 1745 | add_symbol_to_list (sym, list_in_scope); |
35f5886e | 1746 | } |
84ce6717 | 1747 | /* Now create the vector of fields, and record how big it is. This is |
0efe20a6 | 1748 | where we reverse the order, by pulling the members off the list in |
84ce6717 FF |
1749 | reverse order from how they were inserted. If we have no fields |
1750 | (this is apparently possible in C++) then skip building a field | |
1751 | vector. */ | |
1752 | if (nfields > 0) | |
1753 | { | |
1754 | TYPE_NFIELDS (type) = nfields; | |
1755 | TYPE_FIELDS (type) = (struct field *) | |
1ab3bf1b | 1756 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct field) * nfields); |
84ce6717 FF |
1757 | /* Copy the saved-up fields into the field vector. */ |
1758 | for (n = 0; (n < nfields) && (list != NULL); list = list -> next) | |
1759 | { | |
1760 | TYPE_FIELD (type, n++) = list -> field; | |
1761 | } | |
1762 | } | |
35f5886e | 1763 | } |
35f5886e FF |
1764 | return (type); |
1765 | } | |
1766 | ||
1767 | /* | |
1768 | ||
1769 | LOCAL FUNCTION | |
1770 | ||
1771 | read_func_scope -- process all dies within a function scope | |
1772 | ||
35f5886e FF |
1773 | DESCRIPTION |
1774 | ||
1775 | Process all dies within a given function scope. We are passed | |
1776 | a die information structure pointer DIP for the die which | |
1777 | starts the function scope, and pointers into the raw die data | |
1778 | that define the dies within the function scope. | |
1779 | ||
1780 | For now, we ignore lexical block scopes within the function. | |
1781 | The problem is that AT&T cc does not define a DWARF lexical | |
1782 | block scope for the function itself, while gcc defines a | |
1783 | lexical block scope for the function. We need to think about | |
1784 | how to handle this difference, or if it is even a problem. | |
1785 | (FIXME) | |
1786 | */ | |
1787 | ||
1788 | static void | |
1ab3bf1b JG |
1789 | read_func_scope (dip, thisdie, enddie, objfile) |
1790 | struct dieinfo *dip; | |
1791 | char *thisdie; | |
1792 | char *enddie; | |
1793 | struct objfile *objfile; | |
35f5886e | 1794 | { |
4d315a07 | 1795 | register struct context_stack *new; |
35f5886e | 1796 | |
5e2e79f8 FF |
1797 | if (objfile -> ei.entry_point >= dip -> at_low_pc && |
1798 | objfile -> ei.entry_point < dip -> at_high_pc) | |
35f5886e | 1799 | { |
5e2e79f8 FF |
1800 | objfile -> ei.entry_func_lowpc = dip -> at_low_pc; |
1801 | objfile -> ei.entry_func_highpc = dip -> at_high_pc; | |
35f5886e | 1802 | } |
4d315a07 | 1803 | if (STREQ (dip -> at_name, "main")) /* FIXME: hardwired name */ |
35f5886e | 1804 | { |
5e2e79f8 FF |
1805 | objfile -> ei.main_func_lowpc = dip -> at_low_pc; |
1806 | objfile -> ei.main_func_highpc = dip -> at_high_pc; | |
35f5886e | 1807 | } |
4d315a07 | 1808 | new = push_context (0, dip -> at_low_pc); |
1ab3bf1b | 1809 | new -> name = new_symbol (dip, objfile); |
4d315a07 | 1810 | list_in_scope = &local_symbols; |
13b5a7ff | 1811 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 FF |
1812 | new = pop_context (); |
1813 | /* Make a block for the local symbols within. */ | |
1814 | finish_block (new -> name, &local_symbols, new -> old_blocks, | |
1ab3bf1b | 1815 | new -> start_addr, dip -> at_high_pc, objfile); |
4d315a07 | 1816 | list_in_scope = &file_symbols; |
35f5886e FF |
1817 | } |
1818 | ||
2dbde378 FF |
1819 | |
1820 | /* | |
1821 | ||
1822 | LOCAL FUNCTION | |
1823 | ||
1824 | handle_producer -- process the AT_producer attribute | |
1825 | ||
1826 | DESCRIPTION | |
1827 | ||
1828 | Perform any operations that depend on finding a particular | |
1829 | AT_producer attribute. | |
1830 | ||
1831 | */ | |
1832 | ||
1833 | static void | |
1834 | handle_producer (producer) | |
1835 | char *producer; | |
1836 | { | |
1837 | ||
1838 | /* If this compilation unit was compiled with g++ or gcc, then set the | |
1839 | processing_gcc_compilation flag. */ | |
1840 | ||
1841 | processing_gcc_compilation = | |
1842 | STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER)) | |
93bb6e65 FF |
1843 | /* start-sanitize-chill */ |
1844 | || STREQN (producer, CHILL_PRODUCER, strlen (CHILL_PRODUCER)) | |
1845 | /* end-sanitize-chill */ | |
2dbde378 FF |
1846 | || STREQN (producer, GCC_PRODUCER, strlen (GCC_PRODUCER)); |
1847 | ||
1848 | /* Select a demangling style if we can identify the producer and if | |
1849 | the current style is auto. We leave the current style alone if it | |
1850 | is not auto. We also leave the demangling style alone if we find a | |
1851 | gcc (cc1) producer, as opposed to a g++ (cc1plus) producer. */ | |
1852 | ||
d23639b2 | 1853 | #if 1 /* Works, but is experimental. -fnf */ |
3dc755fb | 1854 | if (AUTO_DEMANGLING) |
2dbde378 FF |
1855 | { |
1856 | if (STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER))) | |
1857 | { | |
1858 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); | |
1859 | } | |
1860 | else if (STREQN (producer, LCC_PRODUCER, strlen (LCC_PRODUCER))) | |
1861 | { | |
1862 | set_demangling_style (LUCID_DEMANGLING_STYLE_STRING); | |
1863 | } | |
1864 | else if (STREQN (producer, CFRONT_PRODUCER, strlen (CFRONT_PRODUCER))) | |
1865 | { | |
1866 | set_demangling_style (CFRONT_DEMANGLING_STYLE_STRING); | |
1867 | } | |
1868 | } | |
1869 | #endif | |
1870 | } | |
1871 | ||
1872 | ||
35f5886e FF |
1873 | /* |
1874 | ||
1875 | LOCAL FUNCTION | |
1876 | ||
1877 | read_file_scope -- process all dies within a file scope | |
1878 | ||
35f5886e FF |
1879 | DESCRIPTION |
1880 | ||
1881 | Process all dies within a given file scope. We are passed a | |
1882 | pointer to the die information structure for the die which | |
1883 | starts the file scope, and pointers into the raw die data which | |
1884 | mark the range of dies within the file scope. | |
1885 | ||
1886 | When the partial symbol table is built, the file offset for the line | |
1887 | number table for each compilation unit is saved in the partial symbol | |
1888 | table entry for that compilation unit. As the symbols for each | |
1889 | compilation unit are read, the line number table is read into memory | |
1890 | and the variable lnbase is set to point to it. Thus all we have to | |
1891 | do is use lnbase to access the line number table for the current | |
1892 | compilation unit. | |
1893 | */ | |
1894 | ||
1895 | static void | |
1ab3bf1b JG |
1896 | read_file_scope (dip, thisdie, enddie, objfile) |
1897 | struct dieinfo *dip; | |
1898 | char *thisdie; | |
1899 | char *enddie; | |
1900 | struct objfile *objfile; | |
35f5886e FF |
1901 | { |
1902 | struct cleanup *back_to; | |
4d315a07 | 1903 | struct symtab *symtab; |
35f5886e | 1904 | |
5e2e79f8 FF |
1905 | if (objfile -> ei.entry_point >= dip -> at_low_pc && |
1906 | objfile -> ei.entry_point < dip -> at_high_pc) | |
35f5886e | 1907 | { |
5e2e79f8 FF |
1908 | objfile -> ei.entry_file_lowpc = dip -> at_low_pc; |
1909 | objfile -> ei.entry_file_highpc = dip -> at_high_pc; | |
35f5886e | 1910 | } |
95ff889e | 1911 | set_cu_language (dip); |
4d315a07 FF |
1912 | if (dip -> at_producer != NULL) |
1913 | { | |
2dbde378 | 1914 | handle_producer (dip -> at_producer); |
4d315a07 | 1915 | } |
35f5886e FF |
1916 | numutypes = (enddie - thisdie) / 4; |
1917 | utypes = (struct type **) xmalloc (numutypes * sizeof (struct type *)); | |
1918 | back_to = make_cleanup (free, utypes); | |
4ed3a9ea | 1919 | memset (utypes, 0, numutypes * sizeof (struct type *)); |
bf229b4e | 1920 | memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *)); |
d4902ab0 | 1921 | start_symtab (dip -> at_name, dip -> at_comp_dir, dip -> at_low_pc); |
35f5886e | 1922 | decode_line_numbers (lnbase); |
13b5a7ff | 1923 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 | 1924 | symtab = end_symtab (dip -> at_high_pc, 0, 0, objfile); |
7b5d9650 | 1925 | if (symtab != NULL) |
4d315a07 | 1926 | { |
95ff889e | 1927 | symtab -> language = cu_language; |
7b5d9650 | 1928 | } |
35f5886e FF |
1929 | do_cleanups (back_to); |
1930 | utypes = NULL; | |
1931 | numutypes = 0; | |
1932 | } | |
1933 | ||
1934 | /* | |
1935 | ||
35f5886e FF |
1936 | LOCAL FUNCTION |
1937 | ||
1938 | process_dies -- process a range of DWARF Information Entries | |
1939 | ||
1940 | SYNOPSIS | |
1941 | ||
8b5b6fae FF |
1942 | static void process_dies (char *thisdie, char *enddie, |
1943 | struct objfile *objfile) | |
35f5886e FF |
1944 | |
1945 | DESCRIPTION | |
1946 | ||
1947 | Process all DIE's in a specified range. May be (and almost | |
1948 | certainly will be) called recursively. | |
1949 | */ | |
1950 | ||
1951 | static void | |
1ab3bf1b JG |
1952 | process_dies (thisdie, enddie, objfile) |
1953 | char *thisdie; | |
1954 | char *enddie; | |
1955 | struct objfile *objfile; | |
35f5886e FF |
1956 | { |
1957 | char *nextdie; | |
1958 | struct dieinfo di; | |
1959 | ||
1960 | while (thisdie < enddie) | |
1961 | { | |
95967e73 | 1962 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 1963 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
1964 | { |
1965 | break; | |
1966 | } | |
13b5a7ff | 1967 | else if (di.die_tag == TAG_padding) |
35f5886e | 1968 | { |
13b5a7ff | 1969 | nextdie = thisdie + di.die_length; |
35f5886e FF |
1970 | } |
1971 | else | |
1972 | { | |
95967e73 | 1973 | completedieinfo (&di, objfile); |
35f5886e FF |
1974 | if (di.at_sibling != 0) |
1975 | { | |
1976 | nextdie = dbbase + di.at_sibling - dbroff; | |
1977 | } | |
1978 | else | |
1979 | { | |
13b5a7ff | 1980 | nextdie = thisdie + di.die_length; |
35f5886e | 1981 | } |
13b5a7ff | 1982 | switch (di.die_tag) |
35f5886e FF |
1983 | { |
1984 | case TAG_compile_unit: | |
a048c8f5 | 1985 | read_file_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
1986 | break; |
1987 | case TAG_global_subroutine: | |
1988 | case TAG_subroutine: | |
2d6186f4 | 1989 | if (di.has_at_low_pc) |
35f5886e | 1990 | { |
a048c8f5 | 1991 | read_func_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
1992 | } |
1993 | break; | |
1994 | case TAG_lexical_block: | |
a048c8f5 | 1995 | read_lexical_block_scope (&di, thisdie, nextdie, objfile); |
35f5886e | 1996 | break; |
95ff889e | 1997 | case TAG_class_type: |
35f5886e FF |
1998 | case TAG_structure_type: |
1999 | case TAG_union_type: | |
8b5b6fae | 2000 | read_structure_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2001 | break; |
2002 | case TAG_enumeration_type: | |
1ab3bf1b | 2003 | read_enumeration (&di, thisdie, nextdie, objfile); |
35f5886e FF |
2004 | break; |
2005 | case TAG_subroutine_type: | |
2006 | read_subroutine_type (&di, thisdie, nextdie); | |
2007 | break; | |
2008 | case TAG_array_type: | |
4d315a07 | 2009 | dwarf_read_array_type (&di); |
35f5886e | 2010 | break; |
9e4c1921 FF |
2011 | case TAG_pointer_type: |
2012 | read_tag_pointer_type (&di); | |
2013 | break; | |
35f5886e | 2014 | default: |
4ed3a9ea | 2015 | new_symbol (&di, objfile); |
35f5886e FF |
2016 | break; |
2017 | } | |
2018 | } | |
2019 | thisdie = nextdie; | |
2020 | } | |
2021 | } | |
2022 | ||
2023 | /* | |
2024 | ||
35f5886e FF |
2025 | LOCAL FUNCTION |
2026 | ||
2027 | decode_line_numbers -- decode a line number table fragment | |
2028 | ||
2029 | SYNOPSIS | |
2030 | ||
2031 | static void decode_line_numbers (char *tblscan, char *tblend, | |
2032 | long length, long base, long line, long pc) | |
2033 | ||
2034 | DESCRIPTION | |
2035 | ||
2036 | Translate the DWARF line number information to gdb form. | |
2037 | ||
2038 | The ".line" section contains one or more line number tables, one for | |
2039 | each ".line" section from the objects that were linked. | |
2040 | ||
2041 | The AT_stmt_list attribute for each TAG_source_file entry in the | |
2042 | ".debug" section contains the offset into the ".line" section for the | |
2043 | start of the table for that file. | |
2044 | ||
2045 | The table itself has the following structure: | |
2046 | ||
2047 | <table length><base address><source statement entry> | |
2048 | 4 bytes 4 bytes 10 bytes | |
2049 | ||
2050 | The table length is the total size of the table, including the 4 bytes | |
2051 | for the length information. | |
2052 | ||
2053 | The base address is the address of the first instruction generated | |
2054 | for the source file. | |
2055 | ||
2056 | Each source statement entry has the following structure: | |
2057 | ||
2058 | <line number><statement position><address delta> | |
2059 | 4 bytes 2 bytes 4 bytes | |
2060 | ||
2061 | The line number is relative to the start of the file, starting with | |
2062 | line 1. | |
2063 | ||
2064 | The statement position either -1 (0xFFFF) or the number of characters | |
2065 | from the beginning of the line to the beginning of the statement. | |
2066 | ||
2067 | The address delta is the difference between the base address and | |
2068 | the address of the first instruction for the statement. | |
2069 | ||
2070 | Note that we must copy the bytes from the packed table to our local | |
2071 | variables before attempting to use them, to avoid alignment problems | |
2072 | on some machines, particularly RISC processors. | |
2073 | ||
2074 | BUGS | |
2075 | ||
2076 | Does gdb expect the line numbers to be sorted? They are now by | |
2077 | chance/luck, but are not required to be. (FIXME) | |
2078 | ||
2079 | The line with number 0 is unused, gdb apparently can discover the | |
2080 | span of the last line some other way. How? (FIXME) | |
2081 | */ | |
2082 | ||
2083 | static void | |
1ab3bf1b JG |
2084 | decode_line_numbers (linetable) |
2085 | char *linetable; | |
35f5886e FF |
2086 | { |
2087 | char *tblscan; | |
2088 | char *tblend; | |
13b5a7ff FF |
2089 | unsigned long length; |
2090 | unsigned long base; | |
2091 | unsigned long line; | |
2092 | unsigned long pc; | |
35f5886e FF |
2093 | |
2094 | if (linetable != NULL) | |
2095 | { | |
2096 | tblscan = tblend = linetable; | |
13b5a7ff FF |
2097 | length = target_to_host (tblscan, SIZEOF_LINETBL_LENGTH, GET_UNSIGNED, |
2098 | current_objfile); | |
2099 | tblscan += SIZEOF_LINETBL_LENGTH; | |
35f5886e | 2100 | tblend += length; |
13b5a7ff FF |
2101 | base = target_to_host (tblscan, TARGET_FT_POINTER_SIZE (objfile), |
2102 | GET_UNSIGNED, current_objfile); | |
2103 | tblscan += TARGET_FT_POINTER_SIZE (objfile); | |
35f5886e | 2104 | base += baseaddr; |
35f5886e FF |
2105 | while (tblscan < tblend) |
2106 | { | |
13b5a7ff FF |
2107 | line = target_to_host (tblscan, SIZEOF_LINETBL_LINENO, GET_UNSIGNED, |
2108 | current_objfile); | |
2109 | tblscan += SIZEOF_LINETBL_LINENO + SIZEOF_LINETBL_STMT; | |
2110 | pc = target_to_host (tblscan, SIZEOF_LINETBL_DELTA, GET_UNSIGNED, | |
2111 | current_objfile); | |
2112 | tblscan += SIZEOF_LINETBL_DELTA; | |
35f5886e | 2113 | pc += base; |
13b5a7ff | 2114 | if (line != 0) |
35f5886e | 2115 | { |
4d315a07 | 2116 | record_line (current_subfile, line, pc); |
35f5886e FF |
2117 | } |
2118 | } | |
2119 | } | |
2120 | } | |
2121 | ||
2122 | /* | |
2123 | ||
35f5886e FF |
2124 | LOCAL FUNCTION |
2125 | ||
2126 | locval -- compute the value of a location attribute | |
2127 | ||
2128 | SYNOPSIS | |
2129 | ||
2130 | static int locval (char *loc) | |
2131 | ||
2132 | DESCRIPTION | |
2133 | ||
2134 | Given pointer to a string of bytes that define a location, compute | |
2135 | the location and return the value. | |
2136 | ||
2137 | When computing values involving the current value of the frame pointer, | |
2138 | the value zero is used, which results in a value relative to the frame | |
2139 | pointer, rather than the absolute value. This is what GDB wants | |
2140 | anyway. | |
2141 | ||
2142 | When the result is a register number, the global isreg flag is set, | |
2143 | otherwise it is cleared. This is a kludge until we figure out a better | |
2144 | way to handle the problem. Gdb's design does not mesh well with the | |
2145 | DWARF notion of a location computing interpreter, which is a shame | |
2146 | because the flexibility goes unused. | |
2147 | ||
2148 | NOTES | |
2149 | ||
2150 | Note that stack[0] is unused except as a default error return. | |
2151 | Note that stack overflow is not yet handled. | |
2152 | */ | |
2153 | ||
2154 | static int | |
1ab3bf1b JG |
2155 | locval (loc) |
2156 | char *loc; | |
35f5886e FF |
2157 | { |
2158 | unsigned short nbytes; | |
13b5a7ff FF |
2159 | unsigned short locsize; |
2160 | auto long stack[64]; | |
35f5886e FF |
2161 | int stacki; |
2162 | char *end; | |
2163 | long regno; | |
13b5a7ff FF |
2164 | int loc_atom_code; |
2165 | int loc_value_size; | |
35f5886e | 2166 | |
13b5a7ff FF |
2167 | nbytes = attribute_size (AT_location); |
2168 | locsize = target_to_host (loc, nbytes, GET_UNSIGNED, current_objfile); | |
2169 | loc += nbytes; | |
2170 | end = loc + locsize; | |
35f5886e FF |
2171 | stacki = 0; |
2172 | stack[stacki] = 0; | |
2173 | isreg = 0; | |
a5bd5ba6 | 2174 | offreg = 0; |
13b5a7ff FF |
2175 | loc_value_size = TARGET_FT_LONG_SIZE (current_objfile); |
2176 | while (loc < end) | |
35f5886e | 2177 | { |
13b5a7ff FF |
2178 | loc_atom_code = target_to_host (loc, SIZEOF_LOC_ATOM_CODE, GET_UNSIGNED, |
2179 | current_objfile); | |
2180 | loc += SIZEOF_LOC_ATOM_CODE; | |
2181 | switch (loc_atom_code) | |
2182 | { | |
2183 | case 0: | |
2184 | /* error */ | |
2185 | loc = end; | |
2186 | break; | |
2187 | case OP_REG: | |
2188 | /* push register (number) */ | |
2189 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2190 | GET_UNSIGNED, current_objfile); | |
2191 | loc += loc_value_size; | |
2192 | isreg = 1; | |
2193 | break; | |
2194 | case OP_BASEREG: | |
2195 | /* push value of register (number) */ | |
2196 | /* Actually, we compute the value as if register has 0 */ | |
2197 | offreg = 1; | |
2198 | regno = target_to_host (loc, loc_value_size, GET_UNSIGNED, | |
2199 | current_objfile); | |
2200 | loc += loc_value_size; | |
2201 | if (regno == R_FP) | |
2202 | { | |
2203 | stack[++stacki] = 0; | |
2204 | } | |
2205 | else | |
2206 | { | |
2207 | stack[++stacki] = 0; | |
51b80b00 FF |
2208 | |
2209 | complain (&basereg_not_handled, DIE_ID, DIE_NAME, regno); | |
13b5a7ff FF |
2210 | } |
2211 | break; | |
2212 | case OP_ADDR: | |
2213 | /* push address (relocated address) */ | |
2214 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2215 | GET_UNSIGNED, current_objfile); | |
2216 | loc += loc_value_size; | |
2217 | break; | |
2218 | case OP_CONST: | |
2219 | /* push constant (number) FIXME: signed or unsigned! */ | |
2220 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2221 | GET_SIGNED, current_objfile); | |
2222 | loc += loc_value_size; | |
2223 | break; | |
2224 | case OP_DEREF2: | |
2225 | /* pop, deref and push 2 bytes (as a long) */ | |
51b80b00 | 2226 | complain (&op_deref2, DIE_ID, DIE_NAME, stack[stacki]); |
13b5a7ff FF |
2227 | break; |
2228 | case OP_DEREF4: /* pop, deref and push 4 bytes (as a long) */ | |
51b80b00 | 2229 | complain (&op_deref4, DIE_ID, DIE_NAME, stack[stacki]); |
13b5a7ff FF |
2230 | break; |
2231 | case OP_ADD: /* pop top 2 items, add, push result */ | |
2232 | stack[stacki - 1] += stack[stacki]; | |
2233 | stacki--; | |
2234 | break; | |
2235 | } | |
35f5886e FF |
2236 | } |
2237 | return (stack[stacki]); | |
2238 | } | |
2239 | ||
2240 | /* | |
2241 | ||
2242 | LOCAL FUNCTION | |
2243 | ||
2244 | read_ofile_symtab -- build a full symtab entry from chunk of DIE's | |
2245 | ||
2246 | SYNOPSIS | |
2247 | ||
a048c8f5 | 2248 | static struct symtab *read_ofile_symtab (struct partial_symtab *pst) |
35f5886e FF |
2249 | |
2250 | DESCRIPTION | |
2251 | ||
1ab3bf1b JG |
2252 | When expanding a partial symbol table entry to a full symbol table |
2253 | entry, this is the function that gets called to read in the symbols | |
2254 | for the compilation unit. | |
2255 | ||
2256 | Returns a pointer to the newly constructed symtab (which is now | |
2257 | the new first one on the objfile's symtab list). | |
35f5886e FF |
2258 | */ |
2259 | ||
2260 | static struct symtab * | |
1ab3bf1b JG |
2261 | read_ofile_symtab (pst) |
2262 | struct partial_symtab *pst; | |
35f5886e FF |
2263 | { |
2264 | struct cleanup *back_to; | |
13b5a7ff | 2265 | unsigned long lnsize; |
d5931d79 | 2266 | file_ptr foffset; |
1ab3bf1b | 2267 | bfd *abfd; |
13b5a7ff | 2268 | char lnsizedata[SIZEOF_LINETBL_LENGTH]; |
1ab3bf1b JG |
2269 | |
2270 | abfd = pst -> objfile -> obfd; | |
2271 | current_objfile = pst -> objfile; | |
2272 | ||
35f5886e FF |
2273 | /* Allocate a buffer for the entire chunk of DIE's for this compilation |
2274 | unit, seek to the location in the file, and read in all the DIE's. */ | |
2275 | ||
2276 | diecount = 0; | |
4090fe1c FF |
2277 | dbsize = DBLENGTH (pst); |
2278 | dbbase = xmalloc (dbsize); | |
35f5886e FF |
2279 | dbroff = DBROFF(pst); |
2280 | foffset = DBFOFF(pst) + dbroff; | |
2670f34d JG |
2281 | base_section_offsets = pst->section_offsets; |
2282 | baseaddr = ANOFFSET (pst->section_offsets, 0); | |
d5931d79 | 2283 | if (bfd_seek (abfd, foffset, L_SET) || |
4090fe1c | 2284 | (bfd_read (dbbase, dbsize, 1, abfd) != dbsize)) |
35f5886e FF |
2285 | { |
2286 | free (dbbase); | |
2287 | error ("can't read DWARF data"); | |
2288 | } | |
2289 | back_to = make_cleanup (free, dbbase); | |
2290 | ||
2291 | /* If there is a line number table associated with this compilation unit | |
13b5a7ff FF |
2292 | then read the size of this fragment in bytes, from the fragment itself. |
2293 | Allocate a buffer for the fragment and read it in for future | |
35f5886e FF |
2294 | processing. */ |
2295 | ||
2296 | lnbase = NULL; | |
2297 | if (LNFOFF (pst)) | |
2298 | { | |
d5931d79 | 2299 | if (bfd_seek (abfd, LNFOFF (pst), L_SET) || |
13b5a7ff FF |
2300 | (bfd_read ((PTR) lnsizedata, sizeof (lnsizedata), 1, abfd) != |
2301 | sizeof (lnsizedata))) | |
35f5886e FF |
2302 | { |
2303 | error ("can't read DWARF line number table size"); | |
2304 | } | |
13b5a7ff FF |
2305 | lnsize = target_to_host (lnsizedata, SIZEOF_LINETBL_LENGTH, |
2306 | GET_UNSIGNED, pst -> objfile); | |
35f5886e | 2307 | lnbase = xmalloc (lnsize); |
d5931d79 | 2308 | if (bfd_seek (abfd, LNFOFF (pst), L_SET) || |
a048c8f5 | 2309 | (bfd_read (lnbase, lnsize, 1, abfd) != lnsize)) |
35f5886e FF |
2310 | { |
2311 | free (lnbase); | |
2312 | error ("can't read DWARF line numbers"); | |
2313 | } | |
2314 | make_cleanup (free, lnbase); | |
2315 | } | |
2316 | ||
4090fe1c | 2317 | process_dies (dbbase, dbbase + dbsize, pst -> objfile); |
35f5886e | 2318 | do_cleanups (back_to); |
1ab3bf1b JG |
2319 | current_objfile = NULL; |
2320 | return (pst -> objfile -> symtabs); | |
35f5886e FF |
2321 | } |
2322 | ||
2323 | /* | |
2324 | ||
2325 | LOCAL FUNCTION | |
2326 | ||
2327 | psymtab_to_symtab_1 -- do grunt work for building a full symtab entry | |
2328 | ||
2329 | SYNOPSIS | |
2330 | ||
a048c8f5 | 2331 | static void psymtab_to_symtab_1 (struct partial_symtab *pst) |
35f5886e FF |
2332 | |
2333 | DESCRIPTION | |
2334 | ||
2335 | Called once for each partial symbol table entry that needs to be | |
2336 | expanded into a full symbol table entry. | |
2337 | ||
2338 | */ | |
2339 | ||
2340 | static void | |
1ab3bf1b JG |
2341 | psymtab_to_symtab_1 (pst) |
2342 | struct partial_symtab *pst; | |
35f5886e FF |
2343 | { |
2344 | int i; | |
d07734e3 | 2345 | struct cleanup *old_chain; |
35f5886e | 2346 | |
1ab3bf1b | 2347 | if (pst != NULL) |
35f5886e | 2348 | { |
1ab3bf1b | 2349 | if (pst->readin) |
35f5886e | 2350 | { |
318bf84f | 2351 | warning ("psymtab for %s already read in. Shouldn't happen.", |
1ab3bf1b JG |
2352 | pst -> filename); |
2353 | } | |
2354 | else | |
2355 | { | |
2356 | /* Read in all partial symtabs on which this one is dependent */ | |
2357 | for (i = 0; i < pst -> number_of_dependencies; i++) | |
2358 | { | |
2359 | if (!pst -> dependencies[i] -> readin) | |
2360 | { | |
2361 | /* Inform about additional files that need to be read in. */ | |
2362 | if (info_verbose) | |
2363 | { | |
2364 | fputs_filtered (" ", stdout); | |
2365 | wrap_here (""); | |
2366 | fputs_filtered ("and ", stdout); | |
2367 | wrap_here (""); | |
2368 | printf_filtered ("%s...", | |
2369 | pst -> dependencies[i] -> filename); | |
2370 | wrap_here (""); | |
2371 | fflush (stdout); /* Flush output */ | |
2372 | } | |
2373 | psymtab_to_symtab_1 (pst -> dependencies[i]); | |
2374 | } | |
2375 | } | |
2376 | if (DBLENGTH (pst)) /* Otherwise it's a dummy */ | |
2377 | { | |
d07734e3 FF |
2378 | buildsym_init (); |
2379 | old_chain = make_cleanup (really_free_pendings, 0); | |
1ab3bf1b JG |
2380 | pst -> symtab = read_ofile_symtab (pst); |
2381 | if (info_verbose) | |
2382 | { | |
2383 | printf_filtered ("%d DIE's, sorting...", diecount); | |
2384 | wrap_here (""); | |
2385 | fflush (stdout); | |
2386 | } | |
2387 | sort_symtab_syms (pst -> symtab); | |
d07734e3 | 2388 | do_cleanups (old_chain); |
1ab3bf1b JG |
2389 | } |
2390 | pst -> readin = 1; | |
35f5886e | 2391 | } |
35f5886e | 2392 | } |
35f5886e FF |
2393 | } |
2394 | ||
2395 | /* | |
2396 | ||
2397 | LOCAL FUNCTION | |
2398 | ||
2399 | dwarf_psymtab_to_symtab -- build a full symtab entry from partial one | |
2400 | ||
2401 | SYNOPSIS | |
2402 | ||
2403 | static void dwarf_psymtab_to_symtab (struct partial_symtab *pst) | |
2404 | ||
2405 | DESCRIPTION | |
2406 | ||
2407 | This is the DWARF support entry point for building a full symbol | |
2408 | table entry from a partial symbol table entry. We are passed a | |
2409 | pointer to the partial symbol table entry that needs to be expanded. | |
2410 | ||
2411 | */ | |
2412 | ||
2413 | static void | |
1ab3bf1b JG |
2414 | dwarf_psymtab_to_symtab (pst) |
2415 | struct partial_symtab *pst; | |
35f5886e | 2416 | { |
7d9884b9 | 2417 | |
1ab3bf1b | 2418 | if (pst != NULL) |
35f5886e | 2419 | { |
1ab3bf1b | 2420 | if (pst -> readin) |
35f5886e | 2421 | { |
318bf84f | 2422 | warning ("psymtab for %s already read in. Shouldn't happen.", |
1ab3bf1b | 2423 | pst -> filename); |
35f5886e | 2424 | } |
1ab3bf1b | 2425 | else |
35f5886e | 2426 | { |
1ab3bf1b JG |
2427 | if (DBLENGTH (pst) || pst -> number_of_dependencies) |
2428 | { | |
2429 | /* Print the message now, before starting serious work, to avoid | |
2430 | disconcerting pauses. */ | |
2431 | if (info_verbose) | |
2432 | { | |
2433 | printf_filtered ("Reading in symbols for %s...", | |
2434 | pst -> filename); | |
2435 | fflush (stdout); | |
2436 | } | |
2437 | ||
2438 | psymtab_to_symtab_1 (pst); | |
2439 | ||
2440 | #if 0 /* FIXME: Check to see what dbxread is doing here and see if | |
2441 | we need to do an equivalent or is this something peculiar to | |
2442 | stabs/a.out format. | |
2443 | Match with global symbols. This only needs to be done once, | |
2444 | after all of the symtabs and dependencies have been read in. | |
2445 | */ | |
2446 | scan_file_globals (pst -> objfile); | |
2447 | #endif | |
2448 | ||
2449 | /* Finish up the verbose info message. */ | |
2450 | if (info_verbose) | |
2451 | { | |
2452 | printf_filtered ("done.\n"); | |
2453 | fflush (stdout); | |
2454 | } | |
2455 | } | |
35f5886e FF |
2456 | } |
2457 | } | |
2458 | } | |
2459 | ||
2460 | /* | |
2461 | ||
2462 | LOCAL FUNCTION | |
2463 | ||
2464 | init_psymbol_list -- initialize storage for partial symbols | |
2465 | ||
2466 | SYNOPSIS | |
2467 | ||
1ab3bf1b | 2468 | static void init_psymbol_list (struct objfile *objfile, int total_symbols) |
35f5886e FF |
2469 | |
2470 | DESCRIPTION | |
2471 | ||
2472 | Initializes storage for all of the partial symbols that will be | |
2473 | created by dwarf_build_psymtabs and subsidiaries. | |
2474 | */ | |
2475 | ||
2476 | static void | |
1ab3bf1b JG |
2477 | init_psymbol_list (objfile, total_symbols) |
2478 | struct objfile *objfile; | |
2479 | int total_symbols; | |
35f5886e FF |
2480 | { |
2481 | /* Free any previously allocated psymbol lists. */ | |
2482 | ||
1ab3bf1b | 2483 | if (objfile -> global_psymbols.list) |
35f5886e | 2484 | { |
84ffdec2 | 2485 | mfree (objfile -> md, (PTR)objfile -> global_psymbols.list); |
35f5886e | 2486 | } |
1ab3bf1b | 2487 | if (objfile -> static_psymbols.list) |
35f5886e | 2488 | { |
84ffdec2 | 2489 | mfree (objfile -> md, (PTR)objfile -> static_psymbols.list); |
35f5886e FF |
2490 | } |
2491 | ||
2492 | /* Current best guess is that there are approximately a twentieth | |
2493 | of the total symbols (in a debugging file) are global or static | |
2494 | oriented symbols */ | |
2495 | ||
1ab3bf1b JG |
2496 | objfile -> global_psymbols.size = total_symbols / 10; |
2497 | objfile -> static_psymbols.size = total_symbols / 10; | |
2498 | objfile -> global_psymbols.next = | |
2499 | objfile -> global_psymbols.list = (struct partial_symbol *) | |
318bf84f | 2500 | xmmalloc (objfile -> md, objfile -> global_psymbols.size |
1ab3bf1b JG |
2501 | * sizeof (struct partial_symbol)); |
2502 | objfile -> static_psymbols.next = | |
2503 | objfile -> static_psymbols.list = (struct partial_symbol *) | |
318bf84f | 2504 | xmmalloc (objfile -> md, objfile -> static_psymbols.size |
1ab3bf1b | 2505 | * sizeof (struct partial_symbol)); |
35f5886e FF |
2506 | } |
2507 | ||
35f5886e FF |
2508 | /* |
2509 | ||
715cafcb FF |
2510 | LOCAL FUNCTION |
2511 | ||
2512 | add_enum_psymbol -- add enumeration members to partial symbol table | |
2513 | ||
2514 | DESCRIPTION | |
2515 | ||
2516 | Given pointer to a DIE that is known to be for an enumeration, | |
2517 | extract the symbolic names of the enumeration members and add | |
2518 | partial symbols for them. | |
2519 | */ | |
2520 | ||
2521 | static void | |
1ab3bf1b JG |
2522 | add_enum_psymbol (dip, objfile) |
2523 | struct dieinfo *dip; | |
2524 | struct objfile *objfile; | |
715cafcb FF |
2525 | { |
2526 | char *scan; | |
2527 | char *listend; | |
13b5a7ff FF |
2528 | unsigned short blocksz; |
2529 | int nbytes; | |
715cafcb FF |
2530 | |
2531 | if ((scan = dip -> at_element_list) != NULL) | |
2532 | { | |
2533 | if (dip -> short_element_list) | |
2534 | { | |
13b5a7ff | 2535 | nbytes = attribute_size (AT_short_element_list); |
715cafcb FF |
2536 | } |
2537 | else | |
2538 | { | |
13b5a7ff | 2539 | nbytes = attribute_size (AT_element_list); |
715cafcb | 2540 | } |
13b5a7ff FF |
2541 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); |
2542 | scan += nbytes; | |
2543 | listend = scan + blocksz; | |
715cafcb FF |
2544 | while (scan < listend) |
2545 | { | |
13b5a7ff | 2546 | scan += TARGET_FT_LONG_SIZE (objfile); |
b440b1e9 | 2547 | ADD_PSYMBOL_TO_LIST (scan, strlen (scan), VAR_NAMESPACE, LOC_CONST, |
2e4964ad FF |
2548 | objfile -> static_psymbols, 0, cu_language, |
2549 | objfile); | |
715cafcb FF |
2550 | scan += strlen (scan) + 1; |
2551 | } | |
2552 | } | |
2553 | } | |
2554 | ||
2555 | /* | |
2556 | ||
35f5886e FF |
2557 | LOCAL FUNCTION |
2558 | ||
2559 | add_partial_symbol -- add symbol to partial symbol table | |
2560 | ||
2561 | DESCRIPTION | |
2562 | ||
2563 | Given a DIE, if it is one of the types that we want to | |
2564 | add to a partial symbol table, finish filling in the die info | |
2565 | and then add a partial symbol table entry for it. | |
2566 | ||
95ff889e FF |
2567 | NOTES |
2568 | ||
2569 | The caller must ensure that the DIE has a valid name attribute. | |
35f5886e FF |
2570 | */ |
2571 | ||
2572 | static void | |
1ab3bf1b JG |
2573 | add_partial_symbol (dip, objfile) |
2574 | struct dieinfo *dip; | |
2575 | struct objfile *objfile; | |
35f5886e | 2576 | { |
13b5a7ff | 2577 | switch (dip -> die_tag) |
35f5886e FF |
2578 | { |
2579 | case TAG_global_subroutine: | |
1ab3bf1b JG |
2580 | record_minimal_symbol (dip -> at_name, dip -> at_low_pc, mst_text, |
2581 | objfile); | |
b440b1e9 | 2582 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2583 | VAR_NAMESPACE, LOC_BLOCK, |
2584 | objfile -> global_psymbols, | |
2e4964ad | 2585 | dip -> at_low_pc, cu_language, objfile); |
35f5886e FF |
2586 | break; |
2587 | case TAG_global_variable: | |
1ab3bf1b JG |
2588 | record_minimal_symbol (dip -> at_name, locval (dip -> at_location), |
2589 | mst_data, objfile); | |
b440b1e9 | 2590 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2591 | VAR_NAMESPACE, LOC_STATIC, |
2592 | objfile -> global_psymbols, | |
2e4964ad | 2593 | 0, cu_language, objfile); |
35f5886e FF |
2594 | break; |
2595 | case TAG_subroutine: | |
b440b1e9 | 2596 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2597 | VAR_NAMESPACE, LOC_BLOCK, |
2598 | objfile -> static_psymbols, | |
2e4964ad | 2599 | dip -> at_low_pc, cu_language, objfile); |
35f5886e FF |
2600 | break; |
2601 | case TAG_local_variable: | |
b440b1e9 | 2602 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2603 | VAR_NAMESPACE, LOC_STATIC, |
2604 | objfile -> static_psymbols, | |
2e4964ad | 2605 | 0, cu_language, objfile); |
35f5886e FF |
2606 | break; |
2607 | case TAG_typedef: | |
b440b1e9 | 2608 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2609 | VAR_NAMESPACE, LOC_TYPEDEF, |
2610 | objfile -> static_psymbols, | |
2e4964ad | 2611 | 0, cu_language, objfile); |
35f5886e | 2612 | break; |
95ff889e | 2613 | case TAG_class_type: |
35f5886e FF |
2614 | case TAG_structure_type: |
2615 | case TAG_union_type: | |
95ff889e | 2616 | case TAG_enumeration_type: |
b440b1e9 | 2617 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2618 | STRUCT_NAMESPACE, LOC_TYPEDEF, |
2619 | objfile -> static_psymbols, | |
2e4964ad | 2620 | 0, cu_language, objfile); |
95ff889e | 2621 | if (cu_language == language_cplus) |
715cafcb | 2622 | { |
95ff889e | 2623 | /* For C++, these implicitly act as typedefs as well. */ |
b440b1e9 | 2624 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
95ff889e | 2625 | VAR_NAMESPACE, LOC_TYPEDEF, |
1ab3bf1b | 2626 | objfile -> static_psymbols, |
2e4964ad | 2627 | 0, cu_language, objfile); |
715cafcb | 2628 | } |
715cafcb | 2629 | break; |
35f5886e FF |
2630 | } |
2631 | } | |
2632 | ||
2633 | /* | |
2634 | ||
2635 | LOCAL FUNCTION | |
2636 | ||
2637 | scan_partial_symbols -- scan DIE's within a single compilation unit | |
2638 | ||
2639 | DESCRIPTION | |
2640 | ||
2641 | Process the DIE's within a single compilation unit, looking for | |
2642 | interesting DIE's that contribute to the partial symbol table entry | |
a679650f | 2643 | for this compilation unit. |
35f5886e | 2644 | |
2d6186f4 FF |
2645 | NOTES |
2646 | ||
a679650f FF |
2647 | There are some DIE's that may appear both at file scope and within |
2648 | the scope of a function. We are only interested in the ones at file | |
2649 | scope, and the only way to tell them apart is to keep track of the | |
2650 | scope. For example, consider the test case: | |
2651 | ||
2652 | static int i; | |
2653 | main () { int j; } | |
2654 | ||
2655 | for which the relevant DWARF segment has the structure: | |
2656 | ||
2657 | 0x51: | |
2658 | 0x23 global subrtn sibling 0x9b | |
2659 | name main | |
2660 | fund_type FT_integer | |
2661 | low_pc 0x800004cc | |
2662 | high_pc 0x800004d4 | |
2663 | ||
2664 | 0x74: | |
2665 | 0x23 local var sibling 0x97 | |
2666 | name j | |
2667 | fund_type FT_integer | |
2668 | location OP_BASEREG 0xe | |
2669 | OP_CONST 0xfffffffc | |
2670 | OP_ADD | |
2671 | 0x97: | |
2672 | 0x4 | |
2673 | ||
2674 | 0x9b: | |
2675 | 0x1d local var sibling 0xb8 | |
2676 | name i | |
2677 | fund_type FT_integer | |
2678 | location OP_ADDR 0x800025dc | |
2679 | ||
2680 | 0xb8: | |
2681 | 0x4 | |
2682 | ||
2683 | We want to include the symbol 'i' in the partial symbol table, but | |
2684 | not the symbol 'j'. In essence, we want to skip all the dies within | |
2685 | the scope of a TAG_global_subroutine DIE. | |
2686 | ||
715cafcb FF |
2687 | Don't attempt to add anonymous structures or unions since they have |
2688 | no name. Anonymous enumerations however are processed, because we | |
2689 | want to extract their member names (the check for a tag name is | |
2690 | done later). | |
2d6186f4 | 2691 | |
715cafcb FF |
2692 | Also, for variables and subroutines, check that this is the place |
2693 | where the actual definition occurs, rather than just a reference | |
2694 | to an external. | |
35f5886e FF |
2695 | */ |
2696 | ||
2697 | static void | |
1ab3bf1b JG |
2698 | scan_partial_symbols (thisdie, enddie, objfile) |
2699 | char *thisdie; | |
2700 | char *enddie; | |
2701 | struct objfile *objfile; | |
35f5886e FF |
2702 | { |
2703 | char *nextdie; | |
a679650f | 2704 | char *temp; |
35f5886e FF |
2705 | struct dieinfo di; |
2706 | ||
2707 | while (thisdie < enddie) | |
2708 | { | |
95967e73 | 2709 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2710 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2711 | { |
2712 | break; | |
2713 | } | |
2714 | else | |
2715 | { | |
13b5a7ff | 2716 | nextdie = thisdie + di.die_length; |
715cafcb FF |
2717 | /* To avoid getting complete die information for every die, we |
2718 | only do it (below) for the cases we are interested in. */ | |
13b5a7ff | 2719 | switch (di.die_tag) |
35f5886e FF |
2720 | { |
2721 | case TAG_global_subroutine: | |
35f5886e | 2722 | case TAG_subroutine: |
a679650f FF |
2723 | completedieinfo (&di, objfile); |
2724 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2725 | { | |
2726 | add_partial_symbol (&di, objfile); | |
2727 | /* If there is a sibling attribute, adjust the nextdie | |
2728 | pointer to skip the entire scope of the subroutine. | |
2729 | Apply some sanity checking to make sure we don't | |
2730 | overrun or underrun the range of remaining DIE's */ | |
2731 | if (di.at_sibling != 0) | |
2732 | { | |
2733 | temp = dbbase + di.at_sibling - dbroff; | |
2734 | if ((temp < thisdie) || (temp >= enddie)) | |
2735 | { | |
51b80b00 FF |
2736 | complain (&bad_die_ref, DIE_ID, DIE_NAME, |
2737 | di.at_sibling); | |
a679650f FF |
2738 | } |
2739 | else | |
2740 | { | |
2741 | nextdie = temp; | |
2742 | } | |
2743 | } | |
2744 | } | |
2745 | break; | |
2d6186f4 | 2746 | case TAG_global_variable: |
35f5886e | 2747 | case TAG_local_variable: |
95967e73 | 2748 | completedieinfo (&di, objfile); |
2d6186f4 FF |
2749 | if (di.at_name && (di.has_at_low_pc || di.at_location)) |
2750 | { | |
1ab3bf1b | 2751 | add_partial_symbol (&di, objfile); |
2d6186f4 FF |
2752 | } |
2753 | break; | |
35f5886e | 2754 | case TAG_typedef: |
95ff889e | 2755 | case TAG_class_type: |
35f5886e FF |
2756 | case TAG_structure_type: |
2757 | case TAG_union_type: | |
95967e73 | 2758 | completedieinfo (&di, objfile); |
2d6186f4 | 2759 | if (di.at_name) |
35f5886e | 2760 | { |
1ab3bf1b | 2761 | add_partial_symbol (&di, objfile); |
35f5886e FF |
2762 | } |
2763 | break; | |
715cafcb | 2764 | case TAG_enumeration_type: |
95967e73 | 2765 | completedieinfo (&di, objfile); |
95ff889e FF |
2766 | if (di.at_name) |
2767 | { | |
2768 | add_partial_symbol (&di, objfile); | |
2769 | } | |
2770 | add_enum_psymbol (&di, objfile); | |
715cafcb | 2771 | break; |
35f5886e FF |
2772 | } |
2773 | } | |
2774 | thisdie = nextdie; | |
2775 | } | |
2776 | } | |
2777 | ||
2778 | /* | |
2779 | ||
2780 | LOCAL FUNCTION | |
2781 | ||
2782 | scan_compilation_units -- build a psymtab entry for each compilation | |
2783 | ||
2784 | DESCRIPTION | |
2785 | ||
2786 | This is the top level dwarf parsing routine for building partial | |
2787 | symbol tables. | |
2788 | ||
2789 | It scans from the beginning of the DWARF table looking for the first | |
2790 | TAG_compile_unit DIE, and then follows the sibling chain to locate | |
2791 | each additional TAG_compile_unit DIE. | |
2792 | ||
2793 | For each TAG_compile_unit DIE it creates a partial symtab structure, | |
2794 | calls a subordinate routine to collect all the compilation unit's | |
2795 | global DIE's, file scope DIEs, typedef DIEs, etc, and then links the | |
2796 | new partial symtab structure into the partial symbol table. It also | |
2797 | records the appropriate information in the partial symbol table entry | |
2798 | to allow the chunk of DIE's and line number table for this compilation | |
2799 | unit to be located and re-read later, to generate a complete symbol | |
2800 | table entry for the compilation unit. | |
2801 | ||
2802 | Thus it effectively partitions up a chunk of DIE's for multiple | |
2803 | compilation units into smaller DIE chunks and line number tables, | |
2804 | and associates them with a partial symbol table entry. | |
2805 | ||
2806 | NOTES | |
2807 | ||
2808 | If any compilation unit has no line number table associated with | |
2809 | it for some reason (a missing at_stmt_list attribute, rather than | |
2810 | just one with a value of zero, which is valid) then we ensure that | |
2811 | the recorded file offset is zero so that the routine which later | |
2812 | reads line number table fragments knows that there is no fragment | |
2813 | to read. | |
2814 | ||
2815 | RETURNS | |
2816 | ||
2817 | Returns no value. | |
2818 | ||
2819 | */ | |
2820 | ||
2821 | static void | |
d5931d79 | 2822 | scan_compilation_units (thisdie, enddie, dbfoff, lnoffset, objfile) |
1ab3bf1b JG |
2823 | char *thisdie; |
2824 | char *enddie; | |
d5931d79 JG |
2825 | file_ptr dbfoff; |
2826 | file_ptr lnoffset; | |
1ab3bf1b | 2827 | struct objfile *objfile; |
35f5886e FF |
2828 | { |
2829 | char *nextdie; | |
2830 | struct dieinfo di; | |
2831 | struct partial_symtab *pst; | |
2832 | int culength; | |
2833 | int curoff; | |
d5931d79 | 2834 | file_ptr curlnoffset; |
35f5886e FF |
2835 | |
2836 | while (thisdie < enddie) | |
2837 | { | |
95967e73 | 2838 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2839 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2840 | { |
2841 | break; | |
2842 | } | |
13b5a7ff | 2843 | else if (di.die_tag != TAG_compile_unit) |
35f5886e | 2844 | { |
13b5a7ff | 2845 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2846 | } |
2847 | else | |
2848 | { | |
95967e73 | 2849 | completedieinfo (&di, objfile); |
95ff889e | 2850 | set_cu_language (&di); |
35f5886e FF |
2851 | if (di.at_sibling != 0) |
2852 | { | |
2853 | nextdie = dbbase + di.at_sibling - dbroff; | |
2854 | } | |
2855 | else | |
2856 | { | |
13b5a7ff | 2857 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2858 | } |
2859 | curoff = thisdie - dbbase; | |
2860 | culength = nextdie - thisdie; | |
2d6186f4 | 2861 | curlnoffset = di.has_at_stmt_list ? lnoffset + di.at_stmt_list : 0; |
1ab3bf1b JG |
2862 | |
2863 | /* First allocate a new partial symbol table structure */ | |
2864 | ||
95ff889e FF |
2865 | pst = start_psymtab_common (objfile, base_section_offsets, |
2866 | di.at_name, di.at_low_pc, | |
1ab3bf1b JG |
2867 | objfile -> global_psymbols.next, |
2868 | objfile -> static_psymbols.next); | |
2869 | ||
2870 | pst -> texthigh = di.at_high_pc; | |
2871 | pst -> read_symtab_private = (char *) | |
2872 | obstack_alloc (&objfile -> psymbol_obstack, | |
2873 | sizeof (struct dwfinfo)); | |
2874 | DBFOFF (pst) = dbfoff; | |
2875 | DBROFF (pst) = curoff; | |
2876 | DBLENGTH (pst) = culength; | |
2877 | LNFOFF (pst) = curlnoffset; | |
2878 | pst -> read_symtab = dwarf_psymtab_to_symtab; | |
2879 | ||
2880 | /* Now look for partial symbols */ | |
2881 | ||
13b5a7ff | 2882 | scan_partial_symbols (thisdie + di.die_length, nextdie, objfile); |
1ab3bf1b JG |
2883 | |
2884 | pst -> n_global_syms = objfile -> global_psymbols.next - | |
2885 | (objfile -> global_psymbols.list + pst -> globals_offset); | |
2886 | pst -> n_static_syms = objfile -> static_psymbols.next - | |
2887 | (objfile -> static_psymbols.list + pst -> statics_offset); | |
2888 | sort_pst_symbols (pst); | |
35f5886e FF |
2889 | /* If there is already a psymtab or symtab for a file of this name, |
2890 | remove it. (If there is a symtab, more drastic things also | |
2891 | happen.) This happens in VxWorks. */ | |
2892 | free_named_symtabs (pst -> filename); | |
35f5886e FF |
2893 | } |
2894 | thisdie = nextdie; | |
2895 | } | |
2896 | } | |
2897 | ||
2898 | /* | |
2899 | ||
2900 | LOCAL FUNCTION | |
2901 | ||
2902 | new_symbol -- make a symbol table entry for a new symbol | |
2903 | ||
2904 | SYNOPSIS | |
2905 | ||
1ab3bf1b JG |
2906 | static struct symbol *new_symbol (struct dieinfo *dip, |
2907 | struct objfile *objfile) | |
35f5886e FF |
2908 | |
2909 | DESCRIPTION | |
2910 | ||
2911 | Given a pointer to a DWARF information entry, figure out if we need | |
2912 | to make a symbol table entry for it, and if so, create a new entry | |
2913 | and return a pointer to it. | |
2914 | */ | |
2915 | ||
2916 | static struct symbol * | |
1ab3bf1b JG |
2917 | new_symbol (dip, objfile) |
2918 | struct dieinfo *dip; | |
2919 | struct objfile *objfile; | |
35f5886e FF |
2920 | { |
2921 | struct symbol *sym = NULL; | |
2922 | ||
2923 | if (dip -> at_name != NULL) | |
2924 | { | |
1ab3bf1b | 2925 | sym = (struct symbol *) obstack_alloc (&objfile -> symbol_obstack, |
35f5886e | 2926 | sizeof (struct symbol)); |
4ed3a9ea | 2927 | memset (sym, 0, sizeof (struct symbol)); |
95ff889e FF |
2928 | SYMBOL_NAME (sym) = create_name (dip -> at_name, |
2929 | &objfile->symbol_obstack); | |
35f5886e FF |
2930 | /* default assumptions */ |
2931 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2932 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2933 | SYMBOL_TYPE (sym) = decode_die_type (dip); | |
2e4964ad FF |
2934 | |
2935 | /* If this symbol is from a C++ compilation, then attempt to cache the | |
2936 | demangled form for future reference. This is a typical time versus | |
2937 | space tradeoff, that was decided in favor of time because it sped up | |
2938 | C++ symbol lookups by a factor of about 20. */ | |
2939 | ||
2940 | SYMBOL_LANGUAGE (sym) = cu_language; | |
7532cf10 | 2941 | SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile -> symbol_obstack); |
13b5a7ff | 2942 | switch (dip -> die_tag) |
35f5886e FF |
2943 | { |
2944 | case TAG_label: | |
4d315a07 | 2945 | SYMBOL_VALUE (sym) = dip -> at_low_pc; |
35f5886e FF |
2946 | SYMBOL_CLASS (sym) = LOC_LABEL; |
2947 | break; | |
2948 | case TAG_global_subroutine: | |
2949 | case TAG_subroutine: | |
4d315a07 | 2950 | SYMBOL_VALUE (sym) = dip -> at_low_pc; |
35f5886e FF |
2951 | SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym)); |
2952 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
13b5a7ff | 2953 | if (dip -> die_tag == TAG_global_subroutine) |
35f5886e FF |
2954 | { |
2955 | add_symbol_to_list (sym, &global_symbols); | |
2956 | } | |
2957 | else | |
2958 | { | |
4d315a07 | 2959 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2960 | } |
2961 | break; | |
2962 | case TAG_global_variable: | |
35f5886e FF |
2963 | if (dip -> at_location != NULL) |
2964 | { | |
2965 | SYMBOL_VALUE (sym) = locval (dip -> at_location); | |
35f5886e FF |
2966 | add_symbol_to_list (sym, &global_symbols); |
2967 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2968 | SYMBOL_VALUE (sym) += baseaddr; | |
2969 | } | |
a5bd5ba6 FF |
2970 | break; |
2971 | case TAG_local_variable: | |
2972 | if (dip -> at_location != NULL) | |
35f5886e | 2973 | { |
a5bd5ba6 | 2974 | SYMBOL_VALUE (sym) = locval (dip -> at_location); |
4d315a07 | 2975 | add_symbol_to_list (sym, list_in_scope); |
a5bd5ba6 FF |
2976 | if (isreg) |
2977 | { | |
2978 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
2979 | } | |
2980 | else if (offreg) | |
35f5886e | 2981 | { |
a5bd5ba6 | 2982 | SYMBOL_CLASS (sym) = LOC_LOCAL; |
35f5886e FF |
2983 | } |
2984 | else | |
2985 | { | |
2986 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2987 | SYMBOL_VALUE (sym) += baseaddr; | |
2988 | } | |
2989 | } | |
2990 | break; | |
2991 | case TAG_formal_parameter: | |
2992 | if (dip -> at_location != NULL) | |
2993 | { | |
2994 | SYMBOL_VALUE (sym) = locval (dip -> at_location); | |
2995 | } | |
4d315a07 | 2996 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2997 | if (isreg) |
2998 | { | |
2999 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
3000 | } | |
3001 | else | |
3002 | { | |
3003 | SYMBOL_CLASS (sym) = LOC_ARG; | |
3004 | } | |
3005 | break; | |
3006 | case TAG_unspecified_parameters: | |
3007 | /* From varargs functions; gdb doesn't seem to have any interest in | |
3008 | this information, so just ignore it for now. (FIXME?) */ | |
3009 | break; | |
95ff889e | 3010 | case TAG_class_type: |
35f5886e FF |
3011 | case TAG_structure_type: |
3012 | case TAG_union_type: | |
3013 | case TAG_enumeration_type: | |
3014 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3015 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
4d315a07 | 3016 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
3017 | break; |
3018 | case TAG_typedef: | |
3019 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3020 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
4d315a07 | 3021 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
3022 | break; |
3023 | default: | |
3024 | /* Not a tag we recognize. Hopefully we aren't processing trash | |
3025 | data, but since we must specifically ignore things we don't | |
3026 | recognize, there is nothing else we should do at this point. */ | |
3027 | break; | |
3028 | } | |
3029 | } | |
3030 | return (sym); | |
3031 | } | |
3032 | ||
3033 | /* | |
3034 | ||
95ff889e FF |
3035 | LOCAL FUNCTION |
3036 | ||
3037 | synthesize_typedef -- make a symbol table entry for a "fake" typedef | |
3038 | ||
3039 | SYNOPSIS | |
3040 | ||
3041 | static void synthesize_typedef (struct dieinfo *dip, | |
3042 | struct objfile *objfile, | |
3043 | struct type *type); | |
3044 | ||
3045 | DESCRIPTION | |
3046 | ||
3047 | Given a pointer to a DWARF information entry, synthesize a typedef | |
3048 | for the name in the DIE, using the specified type. | |
3049 | ||
3050 | This is used for C++ class, structs, unions, and enumerations to | |
3051 | set up the tag name as a type. | |
3052 | ||
3053 | */ | |
3054 | ||
3055 | static void | |
3056 | synthesize_typedef (dip, objfile, type) | |
3057 | struct dieinfo *dip; | |
3058 | struct objfile *objfile; | |
3059 | struct type *type; | |
3060 | { | |
3061 | struct symbol *sym = NULL; | |
3062 | ||
3063 | if (dip -> at_name != NULL) | |
3064 | { | |
3065 | sym = (struct symbol *) | |
3066 | obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symbol)); | |
3067 | memset (sym, 0, sizeof (struct symbol)); | |
3068 | SYMBOL_NAME (sym) = create_name (dip -> at_name, | |
3069 | &objfile->symbol_obstack); | |
7532cf10 | 3070 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); |
95ff889e FF |
3071 | SYMBOL_TYPE (sym) = type; |
3072 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
3073 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
3074 | add_symbol_to_list (sym, list_in_scope); | |
3075 | } | |
3076 | } | |
3077 | ||
3078 | /* | |
3079 | ||
35f5886e FF |
3080 | LOCAL FUNCTION |
3081 | ||
3082 | decode_mod_fund_type -- decode a modified fundamental type | |
3083 | ||
3084 | SYNOPSIS | |
3085 | ||
3086 | static struct type *decode_mod_fund_type (char *typedata) | |
3087 | ||
3088 | DESCRIPTION | |
3089 | ||
3090 | Decode a block of data containing a modified fundamental | |
3091 | type specification. TYPEDATA is a pointer to the block, | |
13b5a7ff FF |
3092 | which starts with a length containing the size of the rest |
3093 | of the block. At the end of the block is a fundmental type | |
3094 | code value that gives the fundamental type. Everything | |
35f5886e FF |
3095 | in between are type modifiers. |
3096 | ||
3097 | We simply compute the number of modifiers and call the general | |
3098 | function decode_modified_type to do the actual work. | |
3099 | */ | |
3100 | ||
3101 | static struct type * | |
1ab3bf1b JG |
3102 | decode_mod_fund_type (typedata) |
3103 | char *typedata; | |
35f5886e FF |
3104 | { |
3105 | struct type *typep = NULL; | |
3106 | unsigned short modcount; | |
13b5a7ff | 3107 | int nbytes; |
35f5886e FF |
3108 | |
3109 | /* Get the total size of the block, exclusive of the size itself */ | |
13b5a7ff FF |
3110 | |
3111 | nbytes = attribute_size (AT_mod_fund_type); | |
3112 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3113 | typedata += nbytes; | |
3114 | ||
35f5886e | 3115 | /* Deduct the size of the fundamental type bytes at the end of the block. */ |
13b5a7ff FF |
3116 | |
3117 | modcount -= attribute_size (AT_fund_type); | |
3118 | ||
35f5886e | 3119 | /* Now do the actual decoding */ |
13b5a7ff FF |
3120 | |
3121 | typep = decode_modified_type (typedata, modcount, AT_mod_fund_type); | |
35f5886e FF |
3122 | return (typep); |
3123 | } | |
3124 | ||
3125 | /* | |
3126 | ||
3127 | LOCAL FUNCTION | |
3128 | ||
3129 | decode_mod_u_d_type -- decode a modified user defined type | |
3130 | ||
3131 | SYNOPSIS | |
3132 | ||
3133 | static struct type *decode_mod_u_d_type (char *typedata) | |
3134 | ||
3135 | DESCRIPTION | |
3136 | ||
3137 | Decode a block of data containing a modified user defined | |
3138 | type specification. TYPEDATA is a pointer to the block, | |
3139 | which consists of a two byte length, containing the size | |
3140 | of the rest of the block. At the end of the block is a | |
3141 | four byte value that gives a reference to a user defined type. | |
3142 | Everything in between are type modifiers. | |
3143 | ||
3144 | We simply compute the number of modifiers and call the general | |
3145 | function decode_modified_type to do the actual work. | |
3146 | */ | |
3147 | ||
3148 | static struct type * | |
1ab3bf1b JG |
3149 | decode_mod_u_d_type (typedata) |
3150 | char *typedata; | |
35f5886e FF |
3151 | { |
3152 | struct type *typep = NULL; | |
3153 | unsigned short modcount; | |
13b5a7ff | 3154 | int nbytes; |
35f5886e FF |
3155 | |
3156 | /* Get the total size of the block, exclusive of the size itself */ | |
13b5a7ff FF |
3157 | |
3158 | nbytes = attribute_size (AT_mod_u_d_type); | |
3159 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3160 | typedata += nbytes; | |
3161 | ||
35f5886e | 3162 | /* Deduct the size of the reference type bytes at the end of the block. */ |
13b5a7ff FF |
3163 | |
3164 | modcount -= attribute_size (AT_user_def_type); | |
3165 | ||
35f5886e | 3166 | /* Now do the actual decoding */ |
13b5a7ff FF |
3167 | |
3168 | typep = decode_modified_type (typedata, modcount, AT_mod_u_d_type); | |
35f5886e FF |
3169 | return (typep); |
3170 | } | |
3171 | ||
3172 | /* | |
3173 | ||
3174 | LOCAL FUNCTION | |
3175 | ||
3176 | decode_modified_type -- decode modified user or fundamental type | |
3177 | ||
3178 | SYNOPSIS | |
3179 | ||
1c92ca6f | 3180 | static struct type *decode_modified_type (char *modifiers, |
35f5886e FF |
3181 | unsigned short modcount, int mtype) |
3182 | ||
3183 | DESCRIPTION | |
3184 | ||
3185 | Decode a modified type, either a modified fundamental type or | |
3186 | a modified user defined type. MODIFIERS is a pointer to the | |
3187 | block of bytes that define MODCOUNT modifiers. Immediately | |
3188 | following the last modifier is a short containing the fundamental | |
3189 | type or a long containing the reference to the user defined | |
3190 | type. Which one is determined by MTYPE, which is either | |
3191 | AT_mod_fund_type or AT_mod_u_d_type to indicate what modified | |
3192 | type we are generating. | |
3193 | ||
3194 | We call ourself recursively to generate each modified type,` | |
3195 | until MODCOUNT reaches zero, at which point we have consumed | |
3196 | all the modifiers and generate either the fundamental type or | |
3197 | user defined type. When the recursion unwinds, each modifier | |
3198 | is applied in turn to generate the full modified type. | |
3199 | ||
3200 | NOTES | |
3201 | ||
3202 | If we find a modifier that we don't recognize, and it is not one | |
3203 | of those reserved for application specific use, then we issue a | |
3204 | warning and simply ignore the modifier. | |
3205 | ||
3206 | BUGS | |
3207 | ||
3208 | We currently ignore MOD_const and MOD_volatile. (FIXME) | |
3209 | ||
3210 | */ | |
3211 | ||
3212 | static struct type * | |
1ab3bf1b | 3213 | decode_modified_type (modifiers, modcount, mtype) |
1c92ca6f | 3214 | char *modifiers; |
1ab3bf1b JG |
3215 | unsigned int modcount; |
3216 | int mtype; | |
35f5886e FF |
3217 | { |
3218 | struct type *typep = NULL; | |
3219 | unsigned short fundtype; | |
13b5a7ff | 3220 | DIE_REF die_ref; |
1c92ca6f | 3221 | char modifier; |
13b5a7ff | 3222 | int nbytes; |
35f5886e FF |
3223 | |
3224 | if (modcount == 0) | |
3225 | { | |
3226 | switch (mtype) | |
3227 | { | |
3228 | case AT_mod_fund_type: | |
13b5a7ff FF |
3229 | nbytes = attribute_size (AT_fund_type); |
3230 | fundtype = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3231 | current_objfile); | |
35f5886e FF |
3232 | typep = decode_fund_type (fundtype); |
3233 | break; | |
3234 | case AT_mod_u_d_type: | |
13b5a7ff FF |
3235 | nbytes = attribute_size (AT_user_def_type); |
3236 | die_ref = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3237 | current_objfile); | |
3238 | if ((typep = lookup_utype (die_ref)) == NULL) | |
35f5886e | 3239 | { |
13b5a7ff | 3240 | typep = alloc_utype (die_ref, NULL); |
35f5886e FF |
3241 | } |
3242 | break; | |
3243 | default: | |
51b80b00 | 3244 | complain (&botched_modified_type, DIE_ID, DIE_NAME, mtype); |
bf229b4e | 3245 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
35f5886e FF |
3246 | break; |
3247 | } | |
3248 | } | |
3249 | else | |
3250 | { | |
3251 | modifier = *modifiers++; | |
3252 | typep = decode_modified_type (modifiers, --modcount, mtype); | |
3253 | switch (modifier) | |
3254 | { | |
13b5a7ff FF |
3255 | case MOD_pointer_to: |
3256 | typep = lookup_pointer_type (typep); | |
3257 | break; | |
3258 | case MOD_reference_to: | |
3259 | typep = lookup_reference_type (typep); | |
3260 | break; | |
3261 | case MOD_const: | |
51b80b00 | 3262 | complain (&const_ignored, DIE_ID, DIE_NAME); /* FIXME */ |
13b5a7ff FF |
3263 | break; |
3264 | case MOD_volatile: | |
51b80b00 | 3265 | complain (&volatile_ignored, DIE_ID, DIE_NAME); /* FIXME */ |
13b5a7ff FF |
3266 | break; |
3267 | default: | |
1c92ca6f FF |
3268 | if (!(MOD_lo_user <= (unsigned char) modifier |
3269 | && (unsigned char) modifier <= MOD_hi_user)) | |
13b5a7ff | 3270 | { |
51b80b00 | 3271 | complain (&unknown_type_modifier, DIE_ID, DIE_NAME, modifier); |
13b5a7ff FF |
3272 | } |
3273 | break; | |
35f5886e FF |
3274 | } |
3275 | } | |
3276 | return (typep); | |
3277 | } | |
3278 | ||
3279 | /* | |
3280 | ||
3281 | LOCAL FUNCTION | |
3282 | ||
3283 | decode_fund_type -- translate basic DWARF type to gdb base type | |
3284 | ||
3285 | DESCRIPTION | |
3286 | ||
3287 | Given an integer that is one of the fundamental DWARF types, | |
3288 | translate it to one of the basic internal gdb types and return | |
3289 | a pointer to the appropriate gdb type (a "struct type *"). | |
3290 | ||
3291 | NOTES | |
3292 | ||
85f0a848 FF |
3293 | For robustness, if we are asked to translate a fundamental |
3294 | type that we are unprepared to deal with, we return int so | |
3295 | callers can always depend upon a valid type being returned, | |
3296 | and so gdb may at least do something reasonable by default. | |
3297 | If the type is not in the range of those types defined as | |
3298 | application specific types, we also issue a warning. | |
35f5886e FF |
3299 | */ |
3300 | ||
3301 | static struct type * | |
1ab3bf1b JG |
3302 | decode_fund_type (fundtype) |
3303 | unsigned int fundtype; | |
35f5886e FF |
3304 | { |
3305 | struct type *typep = NULL; | |
3306 | ||
3307 | switch (fundtype) | |
3308 | { | |
3309 | ||
3310 | case FT_void: | |
bf229b4e | 3311 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); |
35f5886e FF |
3312 | break; |
3313 | ||
1ab3bf1b | 3314 | case FT_boolean: /* Was FT_set in AT&T version */ |
bf229b4e | 3315 | typep = dwarf_fundamental_type (current_objfile, FT_BOOLEAN); |
1ab3bf1b JG |
3316 | break; |
3317 | ||
35f5886e | 3318 | case FT_pointer: /* (void *) */ |
bf229b4e | 3319 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); |
1ab3bf1b | 3320 | typep = lookup_pointer_type (typep); |
35f5886e FF |
3321 | break; |
3322 | ||
3323 | case FT_char: | |
bf229b4e | 3324 | typep = dwarf_fundamental_type (current_objfile, FT_CHAR); |
1ab3bf1b JG |
3325 | break; |
3326 | ||
35f5886e | 3327 | case FT_signed_char: |
bf229b4e | 3328 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_CHAR); |
1ab3bf1b JG |
3329 | break; |
3330 | ||
3331 | case FT_unsigned_char: | |
bf229b4e | 3332 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); |
35f5886e FF |
3333 | break; |
3334 | ||
3335 | case FT_short: | |
bf229b4e | 3336 | typep = dwarf_fundamental_type (current_objfile, FT_SHORT); |
1ab3bf1b JG |
3337 | break; |
3338 | ||
35f5886e | 3339 | case FT_signed_short: |
bf229b4e | 3340 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_SHORT); |
1ab3bf1b JG |
3341 | break; |
3342 | ||
3343 | case FT_unsigned_short: | |
bf229b4e | 3344 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); |
35f5886e FF |
3345 | break; |
3346 | ||
3347 | case FT_integer: | |
bf229b4e | 3348 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1ab3bf1b JG |
3349 | break; |
3350 | ||
35f5886e | 3351 | case FT_signed_integer: |
bf229b4e | 3352 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_INTEGER); |
1ab3bf1b JG |
3353 | break; |
3354 | ||
3355 | case FT_unsigned_integer: | |
bf229b4e | 3356 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); |
35f5886e FF |
3357 | break; |
3358 | ||
3359 | case FT_long: | |
bf229b4e | 3360 | typep = dwarf_fundamental_type (current_objfile, FT_LONG); |
1ab3bf1b JG |
3361 | break; |
3362 | ||
35f5886e | 3363 | case FT_signed_long: |
bf229b4e | 3364 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG); |
35f5886e FF |
3365 | break; |
3366 | ||
1ab3bf1b | 3367 | case FT_unsigned_long: |
bf229b4e | 3368 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG); |
35f5886e FF |
3369 | break; |
3370 | ||
1ab3bf1b | 3371 | case FT_long_long: |
bf229b4e | 3372 | typep = dwarf_fundamental_type (current_objfile, FT_LONG_LONG); |
35f5886e | 3373 | break; |
1ab3bf1b JG |
3374 | |
3375 | case FT_signed_long_long: | |
bf229b4e | 3376 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG_LONG); |
35f5886e | 3377 | break; |
1ab3bf1b JG |
3378 | |
3379 | case FT_unsigned_long_long: | |
bf229b4e | 3380 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); |
35f5886e | 3381 | break; |
1ab3bf1b JG |
3382 | |
3383 | case FT_float: | |
bf229b4e | 3384 | typep = dwarf_fundamental_type (current_objfile, FT_FLOAT); |
35f5886e FF |
3385 | break; |
3386 | ||
1ab3bf1b | 3387 | case FT_dbl_prec_float: |
bf229b4e | 3388 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); |
35f5886e FF |
3389 | break; |
3390 | ||
3391 | case FT_ext_prec_float: | |
bf229b4e | 3392 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); |
35f5886e FF |
3393 | break; |
3394 | ||
3395 | case FT_complex: | |
bf229b4e | 3396 | typep = dwarf_fundamental_type (current_objfile, FT_COMPLEX); |
35f5886e FF |
3397 | break; |
3398 | ||
3399 | case FT_dbl_prec_complex: | |
bf229b4e | 3400 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_COMPLEX); |
35f5886e FF |
3401 | break; |
3402 | ||
1ab3bf1b | 3403 | case FT_ext_prec_complex: |
bf229b4e | 3404 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_COMPLEX); |
35f5886e | 3405 | break; |
1ab3bf1b | 3406 | |
35f5886e FF |
3407 | } |
3408 | ||
85f0a848 | 3409 | if (typep == NULL) |
35f5886e | 3410 | { |
85f0a848 FF |
3411 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
3412 | if (!(FT_lo_user <= fundtype && fundtype <= FT_hi_user)) | |
3413 | { | |
51b80b00 | 3414 | complain (&unexpected_fund_type, DIE_ID, DIE_NAME, fundtype); |
85f0a848 | 3415 | } |
35f5886e FF |
3416 | } |
3417 | ||
3418 | return (typep); | |
3419 | } | |
3420 | ||
3421 | /* | |
3422 | ||
3423 | LOCAL FUNCTION | |
3424 | ||
3425 | create_name -- allocate a fresh copy of a string on an obstack | |
3426 | ||
3427 | DESCRIPTION | |
3428 | ||
3429 | Given a pointer to a string and a pointer to an obstack, allocates | |
3430 | a fresh copy of the string on the specified obstack. | |
3431 | ||
3432 | */ | |
3433 | ||
3434 | static char * | |
1ab3bf1b JG |
3435 | create_name (name, obstackp) |
3436 | char *name; | |
3437 | struct obstack *obstackp; | |
35f5886e FF |
3438 | { |
3439 | int length; | |
3440 | char *newname; | |
3441 | ||
3442 | length = strlen (name) + 1; | |
3443 | newname = (char *) obstack_alloc (obstackp, length); | |
4ed3a9ea | 3444 | strcpy (newname, name); |
35f5886e FF |
3445 | return (newname); |
3446 | } | |
3447 | ||
3448 | /* | |
3449 | ||
3450 | LOCAL FUNCTION | |
3451 | ||
3452 | basicdieinfo -- extract the minimal die info from raw die data | |
3453 | ||
3454 | SYNOPSIS | |
3455 | ||
95967e73 FF |
3456 | void basicdieinfo (char *diep, struct dieinfo *dip, |
3457 | struct objfile *objfile) | |
35f5886e FF |
3458 | |
3459 | DESCRIPTION | |
3460 | ||
3461 | Given a pointer to raw DIE data, and a pointer to an instance of a | |
3462 | die info structure, this function extracts the basic information | |
3463 | from the DIE data required to continue processing this DIE, along | |
3464 | with some bookkeeping information about the DIE. | |
3465 | ||
3466 | The information we absolutely must have includes the DIE tag, | |
3467 | and the DIE length. If we need the sibling reference, then we | |
3468 | will have to call completedieinfo() to process all the remaining | |
3469 | DIE information. | |
3470 | ||
3471 | Note that since there is no guarantee that the data is properly | |
3472 | aligned in memory for the type of access required (indirection | |
95967e73 FF |
3473 | through anything other than a char pointer), and there is no |
3474 | guarantee that it is in the same byte order as the gdb host, | |
3475 | we call a function which deals with both alignment and byte | |
3476 | swapping issues. Possibly inefficient, but quite portable. | |
35f5886e FF |
3477 | |
3478 | We also take care of some other basic things at this point, such | |
3479 | as ensuring that the instance of the die info structure starts | |
3480 | out completely zero'd and that curdie is initialized for use | |
3481 | in error reporting if we have a problem with the current die. | |
3482 | ||
3483 | NOTES | |
3484 | ||
3485 | All DIE's must have at least a valid length, thus the minimum | |
13b5a7ff FF |
3486 | DIE size is SIZEOF_DIE_LENGTH. In order to have a valid tag, the |
3487 | DIE size must be at least SIZEOF_DIE_TAG larger, otherwise they | |
35f5886e FF |
3488 | are forced to be TAG_padding DIES. |
3489 | ||
13b5a7ff FF |
3490 | Padding DIES must be at least SIZEOF_DIE_LENGTH in length, implying |
3491 | that if a padding DIE is used for alignment and the amount needed is | |
3492 | less than SIZEOF_DIE_LENGTH, then the padding DIE has to be big | |
3493 | enough to align to the next alignment boundry. | |
4090fe1c FF |
3494 | |
3495 | We do some basic sanity checking here, such as verifying that the | |
3496 | length of the die would not cause it to overrun the recorded end of | |
3497 | the buffer holding the DIE info. If we find a DIE that is either | |
3498 | too small or too large, we force it's length to zero which should | |
3499 | cause the caller to take appropriate action. | |
35f5886e FF |
3500 | */ |
3501 | ||
3502 | static void | |
95967e73 | 3503 | basicdieinfo (dip, diep, objfile) |
1ab3bf1b JG |
3504 | struct dieinfo *dip; |
3505 | char *diep; | |
95967e73 | 3506 | struct objfile *objfile; |
35f5886e FF |
3507 | { |
3508 | curdie = dip; | |
4ed3a9ea | 3509 | memset (dip, 0, sizeof (struct dieinfo)); |
35f5886e | 3510 | dip -> die = diep; |
13b5a7ff FF |
3511 | dip -> die_ref = dbroff + (diep - dbbase); |
3512 | dip -> die_length = target_to_host (diep, SIZEOF_DIE_LENGTH, GET_UNSIGNED, | |
3513 | objfile); | |
4090fe1c FF |
3514 | if ((dip -> die_length < SIZEOF_DIE_LENGTH) || |
3515 | ((diep + dip -> die_length) > (dbbase + dbsize))) | |
35f5886e | 3516 | { |
51b80b00 | 3517 | complain (&malformed_die, DIE_ID, DIE_NAME, dip -> die_length); |
4090fe1c | 3518 | dip -> die_length = 0; |
35f5886e | 3519 | } |
13b5a7ff | 3520 | else if (dip -> die_length < (SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG)) |
35f5886e | 3521 | { |
13b5a7ff | 3522 | dip -> die_tag = TAG_padding; |
35f5886e FF |
3523 | } |
3524 | else | |
3525 | { | |
13b5a7ff FF |
3526 | diep += SIZEOF_DIE_LENGTH; |
3527 | dip -> die_tag = target_to_host (diep, SIZEOF_DIE_TAG, GET_UNSIGNED, | |
3528 | objfile); | |
35f5886e FF |
3529 | } |
3530 | } | |
3531 | ||
3532 | /* | |
3533 | ||
3534 | LOCAL FUNCTION | |
3535 | ||
3536 | completedieinfo -- finish reading the information for a given DIE | |
3537 | ||
3538 | SYNOPSIS | |
3539 | ||
95967e73 | 3540 | void completedieinfo (struct dieinfo *dip, struct objfile *objfile) |
35f5886e FF |
3541 | |
3542 | DESCRIPTION | |
3543 | ||
3544 | Given a pointer to an already partially initialized die info structure, | |
3545 | scan the raw DIE data and finish filling in the die info structure | |
3546 | from the various attributes found. | |
3547 | ||
3548 | Note that since there is no guarantee that the data is properly | |
3549 | aligned in memory for the type of access required (indirection | |
95967e73 FF |
3550 | through anything other than a char pointer), and there is no |
3551 | guarantee that it is in the same byte order as the gdb host, | |
3552 | we call a function which deals with both alignment and byte | |
3553 | swapping issues. Possibly inefficient, but quite portable. | |
35f5886e FF |
3554 | |
3555 | NOTES | |
3556 | ||
3557 | Each time we are called, we increment the diecount variable, which | |
3558 | keeps an approximate count of the number of dies processed for | |
3559 | each compilation unit. This information is presented to the user | |
3560 | if the info_verbose flag is set. | |
3561 | ||
3562 | */ | |
3563 | ||
3564 | static void | |
95967e73 | 3565 | completedieinfo (dip, objfile) |
1ab3bf1b | 3566 | struct dieinfo *dip; |
95967e73 | 3567 | struct objfile *objfile; |
35f5886e FF |
3568 | { |
3569 | char *diep; /* Current pointer into raw DIE data */ | |
3570 | char *end; /* Terminate DIE scan here */ | |
3571 | unsigned short attr; /* Current attribute being scanned */ | |
3572 | unsigned short form; /* Form of the attribute */ | |
13b5a7ff | 3573 | int nbytes; /* Size of next field to read */ |
35f5886e FF |
3574 | |
3575 | diecount++; | |
3576 | diep = dip -> die; | |
13b5a7ff FF |
3577 | end = diep + dip -> die_length; |
3578 | diep += SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG; | |
35f5886e FF |
3579 | while (diep < end) |
3580 | { | |
13b5a7ff FF |
3581 | attr = target_to_host (diep, SIZEOF_ATTRIBUTE, GET_UNSIGNED, objfile); |
3582 | diep += SIZEOF_ATTRIBUTE; | |
3583 | if ((nbytes = attribute_size (attr)) == -1) | |
3584 | { | |
51b80b00 | 3585 | complain (&unknown_attribute_length, DIE_ID, DIE_NAME); |
13b5a7ff FF |
3586 | diep = end; |
3587 | continue; | |
3588 | } | |
35f5886e FF |
3589 | switch (attr) |
3590 | { | |
3591 | case AT_fund_type: | |
13b5a7ff FF |
3592 | dip -> at_fund_type = target_to_host (diep, nbytes, GET_UNSIGNED, |
3593 | objfile); | |
35f5886e FF |
3594 | break; |
3595 | case AT_ordering: | |
13b5a7ff FF |
3596 | dip -> at_ordering = target_to_host (diep, nbytes, GET_UNSIGNED, |
3597 | objfile); | |
35f5886e FF |
3598 | break; |
3599 | case AT_bit_offset: | |
13b5a7ff FF |
3600 | dip -> at_bit_offset = target_to_host (diep, nbytes, GET_UNSIGNED, |
3601 | objfile); | |
35f5886e | 3602 | break; |
35f5886e | 3603 | case AT_sibling: |
13b5a7ff FF |
3604 | dip -> at_sibling = target_to_host (diep, nbytes, GET_UNSIGNED, |
3605 | objfile); | |
35f5886e FF |
3606 | break; |
3607 | case AT_stmt_list: | |
13b5a7ff FF |
3608 | dip -> at_stmt_list = target_to_host (diep, nbytes, GET_UNSIGNED, |
3609 | objfile); | |
2d6186f4 | 3610 | dip -> has_at_stmt_list = 1; |
35f5886e FF |
3611 | break; |
3612 | case AT_low_pc: | |
13b5a7ff FF |
3613 | dip -> at_low_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3614 | objfile); | |
4d315a07 | 3615 | dip -> at_low_pc += baseaddr; |
2d6186f4 | 3616 | dip -> has_at_low_pc = 1; |
35f5886e FF |
3617 | break; |
3618 | case AT_high_pc: | |
13b5a7ff FF |
3619 | dip -> at_high_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3620 | objfile); | |
4d315a07 | 3621 | dip -> at_high_pc += baseaddr; |
35f5886e FF |
3622 | break; |
3623 | case AT_language: | |
13b5a7ff FF |
3624 | dip -> at_language = target_to_host (diep, nbytes, GET_UNSIGNED, |
3625 | objfile); | |
35f5886e FF |
3626 | break; |
3627 | case AT_user_def_type: | |
13b5a7ff FF |
3628 | dip -> at_user_def_type = target_to_host (diep, nbytes, |
3629 | GET_UNSIGNED, objfile); | |
35f5886e FF |
3630 | break; |
3631 | case AT_byte_size: | |
13b5a7ff FF |
3632 | dip -> at_byte_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3633 | objfile); | |
50055e94 | 3634 | dip -> has_at_byte_size = 1; |
35f5886e FF |
3635 | break; |
3636 | case AT_bit_size: | |
13b5a7ff FF |
3637 | dip -> at_bit_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3638 | objfile); | |
35f5886e FF |
3639 | break; |
3640 | case AT_member: | |
13b5a7ff FF |
3641 | dip -> at_member = target_to_host (diep, nbytes, GET_UNSIGNED, |
3642 | objfile); | |
35f5886e FF |
3643 | break; |
3644 | case AT_discr: | |
13b5a7ff FF |
3645 | dip -> at_discr = target_to_host (diep, nbytes, GET_UNSIGNED, |
3646 | objfile); | |
35f5886e | 3647 | break; |
35f5886e FF |
3648 | case AT_location: |
3649 | dip -> at_location = diep; | |
3650 | break; | |
3651 | case AT_mod_fund_type: | |
3652 | dip -> at_mod_fund_type = diep; | |
3653 | break; | |
3654 | case AT_subscr_data: | |
3655 | dip -> at_subscr_data = diep; | |
3656 | break; | |
3657 | case AT_mod_u_d_type: | |
3658 | dip -> at_mod_u_d_type = diep; | |
3659 | break; | |
35f5886e FF |
3660 | case AT_element_list: |
3661 | dip -> at_element_list = diep; | |
768be6e1 FF |
3662 | dip -> short_element_list = 0; |
3663 | break; | |
3664 | case AT_short_element_list: | |
3665 | dip -> at_element_list = diep; | |
3666 | dip -> short_element_list = 1; | |
35f5886e FF |
3667 | break; |
3668 | case AT_discr_value: | |
3669 | dip -> at_discr_value = diep; | |
3670 | break; | |
3671 | case AT_string_length: | |
3672 | dip -> at_string_length = diep; | |
3673 | break; | |
3674 | case AT_name: | |
3675 | dip -> at_name = diep; | |
3676 | break; | |
3677 | case AT_comp_dir: | |
d4902ab0 FF |
3678 | /* For now, ignore any "hostname:" portion, since gdb doesn't |
3679 | know how to deal with it. (FIXME). */ | |
3680 | dip -> at_comp_dir = strrchr (diep, ':'); | |
3681 | if (dip -> at_comp_dir != NULL) | |
3682 | { | |
3683 | dip -> at_comp_dir++; | |
3684 | } | |
3685 | else | |
3686 | { | |
3687 | dip -> at_comp_dir = diep; | |
3688 | } | |
35f5886e FF |
3689 | break; |
3690 | case AT_producer: | |
3691 | dip -> at_producer = diep; | |
3692 | break; | |
35f5886e | 3693 | case AT_start_scope: |
13b5a7ff FF |
3694 | dip -> at_start_scope = target_to_host (diep, nbytes, GET_UNSIGNED, |
3695 | objfile); | |
35f5886e FF |
3696 | break; |
3697 | case AT_stride_size: | |
13b5a7ff FF |
3698 | dip -> at_stride_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3699 | objfile); | |
35f5886e FF |
3700 | break; |
3701 | case AT_src_info: | |
13b5a7ff FF |
3702 | dip -> at_src_info = target_to_host (diep, nbytes, GET_UNSIGNED, |
3703 | objfile); | |
35f5886e FF |
3704 | break; |
3705 | case AT_prototyped: | |
13b5a7ff | 3706 | dip -> at_prototyped = diep; |
35f5886e | 3707 | break; |
35f5886e FF |
3708 | default: |
3709 | /* Found an attribute that we are unprepared to handle. However | |
3710 | it is specifically one of the design goals of DWARF that | |
3711 | consumers should ignore unknown attributes. As long as the | |
3712 | form is one that we recognize (so we know how to skip it), | |
3713 | we can just ignore the unknown attribute. */ | |
3714 | break; | |
3715 | } | |
13b5a7ff | 3716 | form = FORM_FROM_ATTR (attr); |
35f5886e FF |
3717 | switch (form) |
3718 | { | |
3719 | case FORM_DATA2: | |
13b5a7ff | 3720 | diep += 2; |
35f5886e FF |
3721 | break; |
3722 | case FORM_DATA4: | |
13b5a7ff FF |
3723 | case FORM_REF: |
3724 | diep += 4; | |
35f5886e FF |
3725 | break; |
3726 | case FORM_DATA8: | |
13b5a7ff | 3727 | diep += 8; |
35f5886e FF |
3728 | break; |
3729 | case FORM_ADDR: | |
13b5a7ff | 3730 | diep += TARGET_FT_POINTER_SIZE (objfile); |
35f5886e FF |
3731 | break; |
3732 | case FORM_BLOCK2: | |
13b5a7ff | 3733 | diep += 2 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); |
35f5886e FF |
3734 | break; |
3735 | case FORM_BLOCK4: | |
13b5a7ff | 3736 | diep += 4 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); |
35f5886e FF |
3737 | break; |
3738 | case FORM_STRING: | |
3739 | diep += strlen (diep) + 1; | |
3740 | break; | |
3741 | default: | |
51b80b00 | 3742 | complain (&unknown_attribute_form, DIE_ID, DIE_NAME, form); |
35f5886e FF |
3743 | diep = end; |
3744 | break; | |
3745 | } | |
3746 | } | |
3747 | } | |
95967e73 | 3748 | |
13b5a7ff | 3749 | /* |
95967e73 | 3750 | |
13b5a7ff FF |
3751 | LOCAL FUNCTION |
3752 | ||
3753 | target_to_host -- swap in target data to host | |
3754 | ||
3755 | SYNOPSIS | |
3756 | ||
3757 | target_to_host (char *from, int nbytes, int signextend, | |
3758 | struct objfile *objfile) | |
3759 | ||
3760 | DESCRIPTION | |
3761 | ||
3762 | Given pointer to data in target format in FROM, a byte count for | |
3763 | the size of the data in NBYTES, a flag indicating whether or not | |
3764 | the data is signed in SIGNEXTEND, and a pointer to the current | |
3765 | objfile in OBJFILE, convert the data to host format and return | |
3766 | the converted value. | |
3767 | ||
3768 | NOTES | |
3769 | ||
3770 | FIXME: If we read data that is known to be signed, and expect to | |
3771 | use it as signed data, then we need to explicitly sign extend the | |
3772 | result until the bfd library is able to do this for us. | |
3773 | ||
3774 | */ | |
3775 | ||
3776 | static unsigned long | |
3777 | target_to_host (from, nbytes, signextend, objfile) | |
95967e73 FF |
3778 | char *from; |
3779 | int nbytes; | |
13b5a7ff | 3780 | int signextend; /* FIXME: Unused */ |
95967e73 FF |
3781 | struct objfile *objfile; |
3782 | { | |
13b5a7ff | 3783 | unsigned long rtnval; |
95967e73 FF |
3784 | |
3785 | switch (nbytes) | |
3786 | { | |
95967e73 | 3787 | case 8: |
13b5a7ff | 3788 | rtnval = bfd_get_64 (objfile -> obfd, (bfd_byte *) from); |
95967e73 | 3789 | break; |
95967e73 | 3790 | case 4: |
13b5a7ff | 3791 | rtnval = bfd_get_32 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3792 | break; |
3793 | case 2: | |
13b5a7ff | 3794 | rtnval = bfd_get_16 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3795 | break; |
3796 | case 1: | |
13b5a7ff | 3797 | rtnval = bfd_get_8 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3798 | break; |
3799 | default: | |
51b80b00 | 3800 | complain (&no_bfd_get_N, DIE_ID, DIE_NAME, nbytes); |
13b5a7ff | 3801 | rtnval = 0; |
95967e73 FF |
3802 | break; |
3803 | } | |
13b5a7ff | 3804 | return (rtnval); |
95967e73 FF |
3805 | } |
3806 | ||
13b5a7ff FF |
3807 | /* |
3808 | ||
3809 | LOCAL FUNCTION | |
3810 | ||
3811 | attribute_size -- compute size of data for a DWARF attribute | |
3812 | ||
3813 | SYNOPSIS | |
3814 | ||
3815 | static int attribute_size (unsigned int attr) | |
3816 | ||
3817 | DESCRIPTION | |
3818 | ||
3819 | Given a DWARF attribute in ATTR, compute the size of the first | |
3820 | piece of data associated with this attribute and return that | |
3821 | size. | |
3822 | ||
3823 | Returns -1 for unrecognized attributes. | |
3824 | ||
3825 | */ | |
3826 | ||
3827 | static int | |
3828 | attribute_size (attr) | |
3829 | unsigned int attr; | |
3830 | { | |
3831 | int nbytes; /* Size of next data for this attribute */ | |
3832 | unsigned short form; /* Form of the attribute */ | |
3833 | ||
3834 | form = FORM_FROM_ATTR (attr); | |
3835 | switch (form) | |
3836 | { | |
3837 | case FORM_STRING: /* A variable length field is next */ | |
3838 | nbytes = 0; | |
3839 | break; | |
3840 | case FORM_DATA2: /* Next 2 byte field is the data itself */ | |
3841 | case FORM_BLOCK2: /* Next 2 byte field is a block length */ | |
3842 | nbytes = 2; | |
3843 | break; | |
3844 | case FORM_DATA4: /* Next 4 byte field is the data itself */ | |
3845 | case FORM_BLOCK4: /* Next 4 byte field is a block length */ | |
3846 | case FORM_REF: /* Next 4 byte field is a DIE offset */ | |
3847 | nbytes = 4; | |
3848 | break; | |
3849 | case FORM_DATA8: /* Next 8 byte field is the data itself */ | |
3850 | nbytes = 8; | |
3851 | break; | |
3852 | case FORM_ADDR: /* Next field size is target sizeof(void *) */ | |
3853 | nbytes = TARGET_FT_POINTER_SIZE (objfile); | |
3854 | break; | |
3855 | default: | |
51b80b00 | 3856 | complain (&unknown_attribute_form, DIE_ID, DIE_NAME, form); |
13b5a7ff FF |
3857 | nbytes = -1; |
3858 | break; | |
3859 | } | |
3860 | return (nbytes); | |
3861 | } |