Commit | Line | Data |
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c906108c | 1 | /* DWARF debugging format support for GDB. |
b6ba6518 | 2 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, |
181c1381 | 3 | 2001, 2002 |
c906108c SS |
4 | Free Software Foundation, Inc. |
5 | Written by Fred Fish at Cygnus Support. Portions based on dbxread.c, | |
6 | mipsread.c, coffread.c, and dwarfread.c from a Data General SVR4 gdb port. | |
7 | ||
c5aa993b | 8 | This file is part of GDB. |
c906108c | 9 | |
c5aa993b JM |
10 | This program is free software; you can redistribute it and/or modify |
11 | it under the terms of the GNU General Public License as published by | |
12 | the Free Software Foundation; either version 2 of the License, or | |
13 | (at your option) any later version. | |
c906108c | 14 | |
c5aa993b JM |
15 | This program is distributed in the hope that it will be useful, |
16 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | GNU General Public License for more details. | |
c906108c | 19 | |
c5aa993b JM |
20 | You should have received a copy of the GNU General Public License |
21 | along with this program; if not, write to the Free Software | |
22 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
c906108c SS |
23 | |
24 | /* | |
25 | ||
c5aa993b JM |
26 | FIXME: Do we need to generate dependencies in partial symtabs? |
27 | (Perhaps we don't need to). | |
c906108c | 28 | |
c5aa993b JM |
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. | |
c906108c | 34 | |
c5aa993b JM |
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()) | |
c906108c | 37 | |
c5aa993b JM |
38 | FIXME: See other FIXME's and "ifdef 0" scattered throughout the code for |
39 | other things to work on, if you get bored. :-) | |
c906108c | 40 | |
c5aa993b | 41 | */ |
c906108c SS |
42 | |
43 | #include "defs.h" | |
44 | #include "symtab.h" | |
45 | #include "gdbtypes.h" | |
46 | #include "symfile.h" | |
47 | #include "objfiles.h" | |
48 | #include "elf/dwarf.h" | |
49 | #include "buildsym.h" | |
50 | #include "demangle.h" | |
c5aa993b | 51 | #include "expression.h" /* Needed for enum exp_opcode in language.h, sigh... */ |
c906108c SS |
52 | #include "language.h" |
53 | #include "complaints.h" | |
54 | ||
55 | #include <fcntl.h> | |
56 | #include "gdb_string.h" | |
57 | ||
58 | /* Some macros to provide DIE info for complaints. */ | |
59 | ||
60 | #define DIE_ID (curdie!=NULL ? curdie->die_ref : 0) | |
61 | #define DIE_NAME (curdie!=NULL && curdie->at_name!=NULL) ? curdie->at_name : "" | |
62 | ||
63 | /* Complaints that can be issued during DWARF debug info reading. */ | |
64 | ||
23136709 KB |
65 | static void |
66 | bad_die_ref_complaint (int arg1, const char *arg2, int arg3) | |
c906108c | 67 | { |
23136709 KB |
68 | complaint (&symfile_complaints, |
69 | "DIE @ 0x%x \"%s\", reference to DIE (0x%x) outside compilation unit", | |
70 | arg1, arg2, arg3); | |
71 | } | |
c906108c | 72 | |
23136709 KB |
73 | static void |
74 | unknown_attribute_form_complaint (int arg1, const char *arg2, int arg3) | |
c906108c | 75 | { |
23136709 KB |
76 | complaint (&symfile_complaints, |
77 | "DIE @ 0x%x \"%s\", unknown attribute form (0x%x)", arg1, arg2, | |
78 | arg3); | |
79 | } | |
c906108c | 80 | |
23136709 KB |
81 | static void |
82 | dup_user_type_definition_complaint (int arg1, const char *arg2) | |
c906108c | 83 | { |
23136709 KB |
84 | complaint (&symfile_complaints, |
85 | "DIE @ 0x%x \"%s\", internal error: duplicate user type definition", | |
86 | arg1, arg2); | |
87 | } | |
c906108c | 88 | |
23136709 KB |
89 | static void |
90 | bad_array_element_type_complaint (int arg1, const char *arg2, int arg3) | |
c906108c | 91 | { |
23136709 KB |
92 | complaint (&symfile_complaints, |
93 | "DIE @ 0x%x \"%s\", bad array element type attribute 0x%x", arg1, | |
94 | arg2, arg3); | |
95 | } | |
c906108c SS |
96 | |
97 | typedef unsigned int DIE_REF; /* Reference to a DIE */ | |
98 | ||
99 | #ifndef GCC_PRODUCER | |
100 | #define GCC_PRODUCER "GNU C " | |
101 | #endif | |
102 | ||
103 | #ifndef GPLUS_PRODUCER | |
104 | #define GPLUS_PRODUCER "GNU C++ " | |
105 | #endif | |
106 | ||
107 | #ifndef LCC_PRODUCER | |
108 | #define LCC_PRODUCER "NCR C/C++" | |
109 | #endif | |
110 | ||
c906108c SS |
111 | /* Flags to target_to_host() that tell whether or not the data object is |
112 | expected to be signed. Used, for example, when fetching a signed | |
113 | integer in the target environment which is used as a signed integer | |
114 | in the host environment, and the two environments have different sized | |
115 | ints. In this case, *somebody* has to sign extend the smaller sized | |
116 | int. */ | |
117 | ||
118 | #define GET_UNSIGNED 0 /* No sign extension required */ | |
119 | #define GET_SIGNED 1 /* Sign extension required */ | |
120 | ||
121 | /* Defines for things which are specified in the document "DWARF Debugging | |
122 | Information Format" published by UNIX International, Programming Languages | |
123 | SIG. These defines are based on revision 1.0.0, Jan 20, 1992. */ | |
124 | ||
125 | #define SIZEOF_DIE_LENGTH 4 | |
126 | #define SIZEOF_DIE_TAG 2 | |
127 | #define SIZEOF_ATTRIBUTE 2 | |
128 | #define SIZEOF_FORMAT_SPECIFIER 1 | |
129 | #define SIZEOF_FMT_FT 2 | |
130 | #define SIZEOF_LINETBL_LENGTH 4 | |
131 | #define SIZEOF_LINETBL_LINENO 4 | |
132 | #define SIZEOF_LINETBL_STMT 2 | |
133 | #define SIZEOF_LINETBL_DELTA 4 | |
134 | #define SIZEOF_LOC_ATOM_CODE 1 | |
135 | ||
136 | #define FORM_FROM_ATTR(attr) ((attr) & 0xF) /* Implicitly specified */ | |
137 | ||
138 | /* Macros that return the sizes of various types of data in the target | |
139 | environment. | |
140 | ||
141 | FIXME: Currently these are just compile time constants (as they are in | |
142 | other parts of gdb as well). They need to be able to get the right size | |
143 | either from the bfd or possibly from the DWARF info. It would be nice if | |
144 | the DWARF producer inserted DIES that describe the fundamental types in | |
145 | the target environment into the DWARF info, similar to the way dbx stabs | |
146 | producers produce information about their fundamental types. */ | |
147 | ||
148 | #define TARGET_FT_POINTER_SIZE(objfile) (TARGET_PTR_BIT / TARGET_CHAR_BIT) | |
149 | #define TARGET_FT_LONG_SIZE(objfile) (TARGET_LONG_BIT / TARGET_CHAR_BIT) | |
150 | ||
151 | /* The Amiga SVR4 header file <dwarf.h> defines AT_element_list as a | |
152 | FORM_BLOCK2, and this is the value emitted by the AT&T compiler. | |
153 | However, the Issue 2 DWARF specification from AT&T defines it as | |
154 | a FORM_BLOCK4, as does the latest specification from UI/PLSIG. | |
155 | For backwards compatibility with the AT&T compiler produced executables | |
156 | we define AT_short_element_list for this variant. */ | |
157 | ||
158 | #define AT_short_element_list (0x00f0|FORM_BLOCK2) | |
159 | ||
c906108c SS |
160 | /* The DWARF debugging information consists of two major pieces, |
161 | one is a block of DWARF Information Entries (DIE's) and the other | |
162 | is a line number table. The "struct dieinfo" structure contains | |
163 | the information for a single DIE, the one currently being processed. | |
164 | ||
165 | In order to make it easier to randomly access the attribute fields | |
166 | of the current DIE, which are specifically unordered within the DIE, | |
167 | each DIE is scanned and an instance of the "struct dieinfo" | |
168 | structure is initialized. | |
169 | ||
170 | Initialization is done in two levels. The first, done by basicdieinfo(), | |
171 | just initializes those fields that are vital to deciding whether or not | |
172 | to use this DIE, how to skip past it, etc. The second, done by the | |
173 | function completedieinfo(), fills in the rest of the information. | |
174 | ||
175 | Attributes which have block forms are not interpreted at the time | |
176 | the DIE is scanned, instead we just save pointers to the start | |
177 | of their value fields. | |
178 | ||
179 | Some fields have a flag <name>_p that is set when the value of the | |
180 | field is valid (I.E. we found a matching attribute in the DIE). Since | |
181 | we may want to test for the presence of some attributes in the DIE, | |
182 | such as AT_low_pc, without restricting the values of the field, | |
183 | we need someway to note that we found such an attribute. | |
c5aa993b | 184 | |
c906108c | 185 | */ |
c5aa993b | 186 | |
c906108c SS |
187 | typedef char BLOCK; |
188 | ||
c5aa993b JM |
189 | struct dieinfo |
190 | { | |
191 | char *die; /* Pointer to the raw DIE data */ | |
192 | unsigned long die_length; /* Length of the raw DIE data */ | |
193 | DIE_REF die_ref; /* Offset of this DIE */ | |
194 | unsigned short die_tag; /* Tag for this DIE */ | |
195 | unsigned long at_padding; | |
196 | unsigned long at_sibling; | |
197 | BLOCK *at_location; | |
198 | char *at_name; | |
199 | unsigned short at_fund_type; | |
200 | BLOCK *at_mod_fund_type; | |
201 | unsigned long at_user_def_type; | |
202 | BLOCK *at_mod_u_d_type; | |
203 | unsigned short at_ordering; | |
204 | BLOCK *at_subscr_data; | |
205 | unsigned long at_byte_size; | |
206 | unsigned short at_bit_offset; | |
207 | unsigned long at_bit_size; | |
208 | BLOCK *at_element_list; | |
209 | unsigned long at_stmt_list; | |
210 | CORE_ADDR at_low_pc; | |
211 | CORE_ADDR at_high_pc; | |
212 | unsigned long at_language; | |
213 | unsigned long at_member; | |
214 | unsigned long at_discr; | |
215 | BLOCK *at_discr_value; | |
216 | BLOCK *at_string_length; | |
217 | char *at_comp_dir; | |
218 | char *at_producer; | |
219 | unsigned long at_start_scope; | |
220 | unsigned long at_stride_size; | |
221 | unsigned long at_src_info; | |
222 | char *at_prototyped; | |
223 | unsigned int has_at_low_pc:1; | |
224 | unsigned int has_at_stmt_list:1; | |
225 | unsigned int has_at_byte_size:1; | |
226 | unsigned int short_element_list:1; | |
227 | ||
228 | /* Kludge to identify register variables */ | |
229 | ||
230 | unsigned int isreg; | |
231 | ||
232 | /* Kludge to identify optimized out variables */ | |
233 | ||
234 | unsigned int optimized_out; | |
235 | ||
236 | /* Kludge to identify basereg references. | |
237 | Nonzero if we have an offset relative to a basereg. */ | |
238 | ||
239 | unsigned int offreg; | |
240 | ||
241 | /* Kludge to identify which base register is it relative to. */ | |
242 | ||
243 | unsigned int basereg; | |
244 | }; | |
c906108c | 245 | |
c5aa993b | 246 | static int diecount; /* Approximate count of dies for compilation unit */ |
c906108c SS |
247 | static struct dieinfo *curdie; /* For warnings and such */ |
248 | ||
c5aa993b JM |
249 | static char *dbbase; /* Base pointer to dwarf info */ |
250 | static int dbsize; /* Size of dwarf info in bytes */ | |
251 | static int dbroff; /* Relative offset from start of .debug section */ | |
252 | static char *lnbase; /* Base pointer to line section */ | |
c906108c SS |
253 | |
254 | /* This value is added to each symbol value. FIXME: Generalize to | |
255 | the section_offsets structure used by dbxread (once this is done, | |
256 | pass the appropriate section number to end_symtab). */ | |
257 | static CORE_ADDR baseaddr; /* Add to each symbol value */ | |
258 | ||
259 | /* The section offsets used in the current psymtab or symtab. FIXME, | |
260 | only used to pass one value (baseaddr) at the moment. */ | |
261 | static struct section_offsets *base_section_offsets; | |
262 | ||
263 | /* We put a pointer to this structure in the read_symtab_private field | |
264 | of the psymtab. */ | |
265 | ||
c5aa993b JM |
266 | struct dwfinfo |
267 | { | |
268 | /* Always the absolute file offset to the start of the ".debug" | |
269 | section for the file containing the DIE's being accessed. */ | |
270 | file_ptr dbfoff; | |
271 | /* Relative offset from the start of the ".debug" section to the | |
272 | first DIE to be accessed. When building the partial symbol | |
273 | table, this value will be zero since we are accessing the | |
274 | entire ".debug" section. When expanding a partial symbol | |
275 | table entry, this value will be the offset to the first | |
276 | DIE for the compilation unit containing the symbol that | |
277 | triggers the expansion. */ | |
278 | int dbroff; | |
279 | /* The size of the chunk of DIE's being examined, in bytes. */ | |
280 | int dblength; | |
281 | /* The absolute file offset to the line table fragment. Ignored | |
282 | when building partial symbol tables, but used when expanding | |
283 | them, and contains the absolute file offset to the fragment | |
284 | of the ".line" section containing the line numbers for the | |
285 | current compilation unit. */ | |
286 | file_ptr lnfoff; | |
287 | }; | |
c906108c SS |
288 | |
289 | #define DBFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbfoff) | |
290 | #define DBROFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbroff) | |
291 | #define DBLENGTH(p) (((struct dwfinfo *)((p)->read_symtab_private))->dblength) | |
292 | #define LNFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->lnfoff) | |
293 | ||
294 | /* The generic symbol table building routines have separate lists for | |
295 | file scope symbols and all all other scopes (local scopes). So | |
296 | we need to select the right one to pass to add_symbol_to_list(). | |
297 | We do it by keeping a pointer to the correct list in list_in_scope. | |
298 | ||
299 | FIXME: The original dwarf code just treated the file scope as the first | |
300 | local scope, and all other local scopes as nested local scopes, and worked | |
301 | fine. Check to see if we really need to distinguish these in buildsym.c */ | |
302 | ||
303 | struct pending **list_in_scope = &file_symbols; | |
304 | ||
305 | /* DIES which have user defined types or modified user defined types refer to | |
306 | other DIES for the type information. Thus we need to associate the offset | |
307 | of a DIE for a user defined type with a pointer to the type information. | |
308 | ||
309 | Originally this was done using a simple but expensive algorithm, with an | |
310 | array of unsorted structures, each containing an offset/type-pointer pair. | |
311 | This array was scanned linearly each time a lookup was done. The result | |
312 | was that gdb was spending over half it's startup time munging through this | |
313 | array of pointers looking for a structure that had the right offset member. | |
314 | ||
315 | The second attempt used the same array of structures, but the array was | |
316 | sorted using qsort each time a new offset/type was recorded, and a binary | |
317 | search was used to find the type pointer for a given DIE offset. This was | |
318 | even slower, due to the overhead of sorting the array each time a new | |
319 | offset/type pair was entered. | |
320 | ||
321 | The third attempt uses a fixed size array of type pointers, indexed by a | |
322 | value derived from the DIE offset. Since the minimum DIE size is 4 bytes, | |
323 | we can divide any DIE offset by 4 to obtain a unique index into this fixed | |
324 | size array. Since each element is a 4 byte pointer, it takes exactly as | |
325 | much memory to hold this array as to hold the DWARF info for a given | |
326 | compilation unit. But it gets freed as soon as we are done with it. | |
327 | This has worked well in practice, as a reasonable tradeoff between memory | |
328 | consumption and speed, without having to resort to much more complicated | |
329 | algorithms. */ | |
330 | ||
331 | static struct type **utypes; /* Pointer to array of user type pointers */ | |
332 | static int numutypes; /* Max number of user type pointers */ | |
333 | ||
334 | /* Maintain an array of referenced fundamental types for the current | |
335 | compilation unit being read. For DWARF version 1, we have to construct | |
336 | the fundamental types on the fly, since no information about the | |
337 | fundamental types is supplied. Each such fundamental type is created by | |
338 | calling a language dependent routine to create the type, and then a | |
339 | pointer to that type is then placed in the array at the index specified | |
340 | by it's FT_<TYPENAME> value. The array has a fixed size set by the | |
341 | FT_NUM_MEMBERS compile time constant, which is the number of predefined | |
342 | fundamental types gdb knows how to construct. */ | |
343 | ||
c5aa993b | 344 | static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */ |
c906108c SS |
345 | |
346 | /* Record the language for the compilation unit which is currently being | |
347 | processed. We know it once we have seen the TAG_compile_unit DIE, | |
348 | and we need it while processing the DIE's for that compilation unit. | |
349 | It is eventually saved in the symtab structure, but we don't finalize | |
350 | the symtab struct until we have processed all the DIE's for the | |
351 | compilation unit. We also need to get and save a pointer to the | |
352 | language struct for this language, so we can call the language | |
353 | dependent routines for doing things such as creating fundamental | |
354 | types. */ | |
355 | ||
356 | static enum language cu_language; | |
357 | static const struct language_defn *cu_language_defn; | |
358 | ||
359 | /* Forward declarations of static functions so we don't have to worry | |
360 | about ordering within this file. */ | |
361 | ||
a14ed312 | 362 | static void free_utypes (PTR); |
c906108c | 363 | |
a14ed312 | 364 | static int attribute_size (unsigned int); |
c906108c | 365 | |
a14ed312 | 366 | static CORE_ADDR target_to_host (char *, int, int, struct objfile *); |
c906108c | 367 | |
a14ed312 | 368 | static void add_enum_psymbol (struct dieinfo *, struct objfile *); |
c906108c | 369 | |
a14ed312 | 370 | static void handle_producer (char *); |
c906108c SS |
371 | |
372 | static void | |
a14ed312 | 373 | read_file_scope (struct dieinfo *, char *, char *, struct objfile *); |
c906108c SS |
374 | |
375 | static void | |
a14ed312 | 376 | read_func_scope (struct dieinfo *, char *, char *, struct objfile *); |
c906108c SS |
377 | |
378 | static void | |
a14ed312 | 379 | read_lexical_block_scope (struct dieinfo *, char *, char *, struct objfile *); |
c906108c | 380 | |
a14ed312 | 381 | static void scan_partial_symbols (char *, char *, struct objfile *); |
c906108c SS |
382 | |
383 | static void | |
a14ed312 | 384 | scan_compilation_units (char *, char *, file_ptr, file_ptr, struct objfile *); |
c906108c | 385 | |
a14ed312 | 386 | static void add_partial_symbol (struct dieinfo *, struct objfile *); |
c906108c | 387 | |
a14ed312 | 388 | static void basicdieinfo (struct dieinfo *, char *, struct objfile *); |
c906108c | 389 | |
a14ed312 | 390 | static void completedieinfo (struct dieinfo *, struct objfile *); |
c906108c | 391 | |
a14ed312 | 392 | static void dwarf_psymtab_to_symtab (struct partial_symtab *); |
c906108c | 393 | |
a14ed312 | 394 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 395 | |
a14ed312 | 396 | static void read_ofile_symtab (struct partial_symtab *); |
c906108c | 397 | |
a14ed312 | 398 | static void process_dies (char *, char *, struct objfile *); |
c906108c SS |
399 | |
400 | static void | |
a14ed312 | 401 | read_structure_scope (struct dieinfo *, char *, char *, struct objfile *); |
c906108c | 402 | |
a14ed312 | 403 | static struct type *decode_array_element_type (char *); |
c906108c | 404 | |
a14ed312 | 405 | static struct type *decode_subscript_data_item (char *, char *); |
c906108c | 406 | |
a14ed312 | 407 | static void dwarf_read_array_type (struct dieinfo *); |
c906108c | 408 | |
a14ed312 | 409 | static void read_tag_pointer_type (struct dieinfo *dip); |
c906108c | 410 | |
a14ed312 | 411 | static void read_tag_string_type (struct dieinfo *dip); |
c906108c | 412 | |
a14ed312 | 413 | static void read_subroutine_type (struct dieinfo *, char *, char *); |
c906108c SS |
414 | |
415 | static void | |
a14ed312 | 416 | read_enumeration (struct dieinfo *, char *, char *, struct objfile *); |
c906108c | 417 | |
a14ed312 KB |
418 | static struct type *struct_type (struct dieinfo *, char *, char *, |
419 | struct objfile *); | |
c906108c | 420 | |
a14ed312 | 421 | static struct type *enum_type (struct dieinfo *, struct objfile *); |
c906108c | 422 | |
a14ed312 | 423 | static void decode_line_numbers (char *); |
c906108c | 424 | |
a14ed312 | 425 | static struct type *decode_die_type (struct dieinfo *); |
c906108c | 426 | |
a14ed312 | 427 | static struct type *decode_mod_fund_type (char *); |
c906108c | 428 | |
a14ed312 | 429 | static struct type *decode_mod_u_d_type (char *); |
c906108c | 430 | |
a14ed312 | 431 | static struct type *decode_modified_type (char *, unsigned int, int); |
c906108c | 432 | |
a14ed312 | 433 | static struct type *decode_fund_type (unsigned int); |
c906108c | 434 | |
a14ed312 | 435 | static char *create_name (char *, struct obstack *); |
c906108c | 436 | |
a14ed312 | 437 | static struct type *lookup_utype (DIE_REF); |
c906108c | 438 | |
a14ed312 | 439 | static struct type *alloc_utype (DIE_REF, struct type *); |
c906108c | 440 | |
a14ed312 | 441 | static struct symbol *new_symbol (struct dieinfo *, struct objfile *); |
c906108c SS |
442 | |
443 | static void | |
a14ed312 | 444 | synthesize_typedef (struct dieinfo *, struct objfile *, struct type *); |
c906108c | 445 | |
a14ed312 | 446 | static int locval (struct dieinfo *); |
c906108c | 447 | |
a14ed312 | 448 | static void set_cu_language (struct dieinfo *); |
c906108c | 449 | |
a14ed312 | 450 | static struct type *dwarf_fundamental_type (struct objfile *, int); |
c906108c SS |
451 | |
452 | ||
453 | /* | |
454 | ||
c5aa993b | 455 | LOCAL FUNCTION |
c906108c | 456 | |
c5aa993b | 457 | dwarf_fundamental_type -- lookup or create a fundamental type |
c906108c | 458 | |
c5aa993b | 459 | SYNOPSIS |
c906108c | 460 | |
c5aa993b JM |
461 | struct type * |
462 | dwarf_fundamental_type (struct objfile *objfile, int typeid) | |
c906108c | 463 | |
c5aa993b | 464 | DESCRIPTION |
c906108c | 465 | |
c5aa993b JM |
466 | DWARF version 1 doesn't supply any fundamental type information, |
467 | so gdb has to construct such types. It has a fixed number of | |
468 | fundamental types that it knows how to construct, which is the | |
469 | union of all types that it knows how to construct for all languages | |
470 | that it knows about. These are enumerated in gdbtypes.h. | |
c906108c | 471 | |
c5aa993b JM |
472 | As an example, assume we find a DIE that references a DWARF |
473 | fundamental type of FT_integer. We first look in the ftypes | |
474 | array to see if we already have such a type, indexed by the | |
475 | gdb internal value of FT_INTEGER. If so, we simply return a | |
476 | pointer to that type. If not, then we ask an appropriate | |
477 | language dependent routine to create a type FT_INTEGER, using | |
478 | defaults reasonable for the current target machine, and install | |
479 | that type in ftypes for future reference. | |
c906108c | 480 | |
c5aa993b | 481 | RETURNS |
c906108c | 482 | |
c5aa993b | 483 | Pointer to a fundamental type. |
c906108c | 484 | |
c5aa993b | 485 | */ |
c906108c SS |
486 | |
487 | static struct type * | |
fba45db2 | 488 | dwarf_fundamental_type (struct objfile *objfile, int typeid) |
c906108c SS |
489 | { |
490 | if (typeid < 0 || typeid >= FT_NUM_MEMBERS) | |
491 | { | |
492 | error ("internal error - invalid fundamental type id %d", typeid); | |
493 | } | |
494 | ||
495 | /* Look for this particular type in the fundamental type vector. If one is | |
496 | not found, create and install one appropriate for the current language | |
497 | and the current target machine. */ | |
498 | ||
499 | if (ftypes[typeid] == NULL) | |
500 | { | |
c5aa993b | 501 | ftypes[typeid] = cu_language_defn->la_fund_type (objfile, typeid); |
c906108c SS |
502 | } |
503 | ||
504 | return (ftypes[typeid]); | |
505 | } | |
506 | ||
507 | /* | |
508 | ||
c5aa993b | 509 | LOCAL FUNCTION |
c906108c | 510 | |
c5aa993b | 511 | set_cu_language -- set local copy of language for compilation unit |
c906108c | 512 | |
c5aa993b | 513 | SYNOPSIS |
c906108c | 514 | |
c5aa993b JM |
515 | void |
516 | set_cu_language (struct dieinfo *dip) | |
c906108c | 517 | |
c5aa993b | 518 | DESCRIPTION |
c906108c | 519 | |
c5aa993b JM |
520 | Decode the language attribute for a compilation unit DIE and |
521 | remember what the language was. We use this at various times | |
522 | when processing DIE's for a given compilation unit. | |
c906108c | 523 | |
c5aa993b | 524 | RETURNS |
c906108c | 525 | |
c5aa993b | 526 | No return value. |
c906108c SS |
527 | |
528 | */ | |
529 | ||
530 | static void | |
fba45db2 | 531 | set_cu_language (struct dieinfo *dip) |
c906108c | 532 | { |
c5aa993b | 533 | switch (dip->at_language) |
c906108c | 534 | { |
c5aa993b JM |
535 | case LANG_C89: |
536 | case LANG_C: | |
537 | cu_language = language_c; | |
538 | break; | |
539 | case LANG_C_PLUS_PLUS: | |
540 | cu_language = language_cplus; | |
541 | break; | |
c5aa993b JM |
542 | case LANG_MODULA2: |
543 | cu_language = language_m2; | |
544 | break; | |
545 | case LANG_FORTRAN77: | |
546 | case LANG_FORTRAN90: | |
547 | cu_language = language_fortran; | |
548 | break; | |
549 | case LANG_ADA83: | |
550 | case LANG_COBOL74: | |
551 | case LANG_COBOL85: | |
552 | case LANG_PASCAL83: | |
553 | /* We don't know anything special about these yet. */ | |
554 | cu_language = language_unknown; | |
555 | break; | |
556 | default: | |
557 | /* If no at_language, try to deduce one from the filename */ | |
558 | cu_language = deduce_language_from_filename (dip->at_name); | |
559 | break; | |
c906108c SS |
560 | } |
561 | cu_language_defn = language_def (cu_language); | |
562 | } | |
563 | ||
564 | /* | |
565 | ||
c5aa993b | 566 | GLOBAL FUNCTION |
c906108c | 567 | |
c5aa993b | 568 | dwarf_build_psymtabs -- build partial symtabs from DWARF debug info |
c906108c | 569 | |
c5aa993b | 570 | SYNOPSIS |
c906108c | 571 | |
c5aa993b | 572 | void dwarf_build_psymtabs (struct objfile *objfile, |
c5aa993b JM |
573 | int mainline, file_ptr dbfoff, unsigned int dbfsize, |
574 | file_ptr lnoffset, unsigned int lnsize) | |
c906108c | 575 | |
c5aa993b | 576 | DESCRIPTION |
c906108c | 577 | |
c5aa993b JM |
578 | This function is called upon to build partial symtabs from files |
579 | containing DIE's (Dwarf Information Entries) and DWARF line numbers. | |
c906108c | 580 | |
c5aa993b JM |
581 | It is passed a bfd* containing the DIES |
582 | and line number information, the corresponding filename for that | |
583 | file, a base address for relocating the symbols, a flag indicating | |
584 | whether or not this debugging information is from a "main symbol | |
585 | table" rather than a shared library or dynamically linked file, | |
586 | and file offset/size pairs for the DIE information and line number | |
587 | information. | |
c906108c | 588 | |
c5aa993b | 589 | RETURNS |
c906108c | 590 | |
c5aa993b | 591 | No return value. |
c906108c SS |
592 | |
593 | */ | |
594 | ||
595 | void | |
fba45db2 KB |
596 | dwarf_build_psymtabs (struct objfile *objfile, int mainline, file_ptr dbfoff, |
597 | unsigned int dbfsize, file_ptr lnoffset, | |
598 | unsigned int lnsize) | |
c906108c SS |
599 | { |
600 | bfd *abfd = objfile->obfd; | |
601 | struct cleanup *back_to; | |
c5aa993b | 602 | |
c906108c SS |
603 | current_objfile = objfile; |
604 | dbsize = dbfsize; | |
605 | dbbase = xmalloc (dbsize); | |
606 | dbroff = 0; | |
607 | if ((bfd_seek (abfd, dbfoff, SEEK_SET) != 0) || | |
3a42e9d0 | 608 | (bfd_bread (dbbase, dbsize, abfd) != dbsize)) |
c906108c | 609 | { |
b8c9b27d | 610 | xfree (dbbase); |
c906108c SS |
611 | error ("can't read DWARF data from '%s'", bfd_get_filename (abfd)); |
612 | } | |
b8c9b27d | 613 | back_to = make_cleanup (xfree, dbbase); |
c5aa993b | 614 | |
c906108c SS |
615 | /* If we are reinitializing, or if we have never loaded syms yet, init. |
616 | Since we have no idea how many DIES we are looking at, we just guess | |
617 | some arbitrary value. */ | |
c5aa993b | 618 | |
ef96bde8 EZ |
619 | if (mainline |
620 | || (objfile->global_psymbols.size == 0 | |
621 | && objfile->static_psymbols.size == 0)) | |
c906108c SS |
622 | { |
623 | init_psymbol_list (objfile, 1024); | |
624 | } | |
c5aa993b | 625 | |
c906108c SS |
626 | /* Save the relocation factor where everybody can see it. */ |
627 | ||
d4f3574e SS |
628 | base_section_offsets = objfile->section_offsets; |
629 | baseaddr = ANOFFSET (objfile->section_offsets, 0); | |
c906108c SS |
630 | |
631 | /* Follow the compilation unit sibling chain, building a partial symbol | |
632 | table entry for each one. Save enough information about each compilation | |
633 | unit to locate the full DWARF information later. */ | |
c5aa993b | 634 | |
c906108c | 635 | scan_compilation_units (dbbase, dbbase + dbsize, dbfoff, lnoffset, objfile); |
c5aa993b | 636 | |
c906108c SS |
637 | do_cleanups (back_to); |
638 | current_objfile = NULL; | |
639 | } | |
640 | ||
641 | /* | |
642 | ||
c5aa993b | 643 | LOCAL FUNCTION |
c906108c | 644 | |
c5aa993b | 645 | read_lexical_block_scope -- process all dies in a lexical block |
c906108c | 646 | |
c5aa993b | 647 | SYNOPSIS |
c906108c | 648 | |
c5aa993b JM |
649 | static void read_lexical_block_scope (struct dieinfo *dip, |
650 | char *thisdie, char *enddie) | |
c906108c | 651 | |
c5aa993b | 652 | DESCRIPTION |
c906108c | 653 | |
c5aa993b JM |
654 | Process all the DIES contained within a lexical block scope. |
655 | Start a new scope, process the dies, and then close the scope. | |
c906108c SS |
656 | |
657 | */ | |
658 | ||
659 | static void | |
fba45db2 KB |
660 | read_lexical_block_scope (struct dieinfo *dip, char *thisdie, char *enddie, |
661 | struct objfile *objfile) | |
c906108c SS |
662 | { |
663 | register struct context_stack *new; | |
664 | ||
c5aa993b JM |
665 | push_context (0, dip->at_low_pc); |
666 | process_dies (thisdie + dip->die_length, enddie, objfile); | |
c906108c SS |
667 | new = pop_context (); |
668 | if (local_symbols != NULL) | |
669 | { | |
c5aa993b JM |
670 | finish_block (0, &local_symbols, new->old_blocks, new->start_addr, |
671 | dip->at_high_pc, objfile); | |
c906108c | 672 | } |
c5aa993b | 673 | local_symbols = new->locals; |
c906108c SS |
674 | } |
675 | ||
676 | /* | |
677 | ||
c5aa993b | 678 | LOCAL FUNCTION |
c906108c | 679 | |
c5aa993b | 680 | lookup_utype -- look up a user defined type from die reference |
c906108c | 681 | |
c5aa993b | 682 | SYNOPSIS |
c906108c | 683 | |
c5aa993b | 684 | static type *lookup_utype (DIE_REF die_ref) |
c906108c | 685 | |
c5aa993b | 686 | DESCRIPTION |
c906108c | 687 | |
c5aa993b JM |
688 | Given a DIE reference, lookup the user defined type associated with |
689 | that DIE, if it has been registered already. If not registered, then | |
690 | return NULL. Alloc_utype() can be called to register an empty | |
691 | type for this reference, which will be filled in later when the | |
692 | actual referenced DIE is processed. | |
c906108c SS |
693 | */ |
694 | ||
695 | static struct type * | |
fba45db2 | 696 | lookup_utype (DIE_REF die_ref) |
c906108c SS |
697 | { |
698 | struct type *type = NULL; | |
699 | int utypeidx; | |
c5aa993b | 700 | |
c906108c SS |
701 | utypeidx = (die_ref - dbroff) / 4; |
702 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
703 | { | |
23136709 | 704 | bad_die_ref_complaint (DIE_ID, DIE_NAME, die_ref); |
c906108c SS |
705 | } |
706 | else | |
707 | { | |
708 | type = *(utypes + utypeidx); | |
709 | } | |
710 | return (type); | |
711 | } | |
712 | ||
713 | ||
714 | /* | |
715 | ||
c5aa993b | 716 | LOCAL FUNCTION |
c906108c | 717 | |
c5aa993b | 718 | alloc_utype -- add a user defined type for die reference |
c906108c | 719 | |
c5aa993b | 720 | SYNOPSIS |
c906108c | 721 | |
c5aa993b | 722 | static type *alloc_utype (DIE_REF die_ref, struct type *utypep) |
c906108c | 723 | |
c5aa993b | 724 | DESCRIPTION |
c906108c | 725 | |
c5aa993b JM |
726 | Given a die reference DIE_REF, and a possible pointer to a user |
727 | defined type UTYPEP, register that this reference has a user | |
728 | defined type and either use the specified type in UTYPEP or | |
729 | make a new empty type that will be filled in later. | |
c906108c | 730 | |
c5aa993b JM |
731 | We should only be called after calling lookup_utype() to verify that |
732 | there is not currently a type registered for DIE_REF. | |
c906108c SS |
733 | */ |
734 | ||
735 | static struct type * | |
fba45db2 | 736 | alloc_utype (DIE_REF die_ref, struct type *utypep) |
c906108c SS |
737 | { |
738 | struct type **typep; | |
739 | int utypeidx; | |
c5aa993b | 740 | |
c906108c SS |
741 | utypeidx = (die_ref - dbroff) / 4; |
742 | typep = utypes + utypeidx; | |
743 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
744 | { | |
745 | utypep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
23136709 | 746 | bad_die_ref_complaint (DIE_ID, DIE_NAME, die_ref); |
c906108c SS |
747 | } |
748 | else if (*typep != NULL) | |
749 | { | |
750 | utypep = *typep; | |
23136709 KB |
751 | complaint (&symfile_complaints, |
752 | "DIE @ 0x%x \"%s\", internal error: duplicate user type allocation", | |
753 | DIE_ID, DIE_NAME); | |
c906108c SS |
754 | } |
755 | else | |
756 | { | |
757 | if (utypep == NULL) | |
758 | { | |
759 | utypep = alloc_type (current_objfile); | |
760 | } | |
761 | *typep = utypep; | |
762 | } | |
763 | return (utypep); | |
764 | } | |
765 | ||
766 | /* | |
767 | ||
c5aa993b | 768 | LOCAL FUNCTION |
c906108c | 769 | |
c5aa993b | 770 | free_utypes -- free the utypes array and reset pointer & count |
c906108c | 771 | |
c5aa993b | 772 | SYNOPSIS |
c906108c | 773 | |
c5aa993b | 774 | static void free_utypes (PTR dummy) |
c906108c | 775 | |
c5aa993b | 776 | DESCRIPTION |
c906108c | 777 | |
c5aa993b JM |
778 | Called via do_cleanups to free the utypes array, reset the pointer to NULL, |
779 | and set numutypes back to zero. This ensures that the utypes does not get | |
780 | referenced after being freed. | |
c906108c SS |
781 | */ |
782 | ||
783 | static void | |
fba45db2 | 784 | free_utypes (PTR dummy) |
c906108c | 785 | { |
b8c9b27d | 786 | xfree (utypes); |
c906108c SS |
787 | utypes = NULL; |
788 | numutypes = 0; | |
789 | } | |
790 | ||
791 | ||
792 | /* | |
793 | ||
c5aa993b | 794 | LOCAL FUNCTION |
c906108c | 795 | |
c5aa993b | 796 | decode_die_type -- return a type for a specified die |
c906108c | 797 | |
c5aa993b | 798 | SYNOPSIS |
c906108c | 799 | |
c5aa993b | 800 | static struct type *decode_die_type (struct dieinfo *dip) |
c906108c | 801 | |
c5aa993b | 802 | DESCRIPTION |
c906108c | 803 | |
c5aa993b JM |
804 | Given a pointer to a die information structure DIP, decode the |
805 | type of the die and return a pointer to the decoded type. All | |
806 | dies without specific types default to type int. | |
c906108c SS |
807 | */ |
808 | ||
809 | static struct type * | |
fba45db2 | 810 | decode_die_type (struct dieinfo *dip) |
c906108c SS |
811 | { |
812 | struct type *type = NULL; | |
c5aa993b JM |
813 | |
814 | if (dip->at_fund_type != 0) | |
c906108c | 815 | { |
c5aa993b | 816 | type = decode_fund_type (dip->at_fund_type); |
c906108c | 817 | } |
c5aa993b | 818 | else if (dip->at_mod_fund_type != NULL) |
c906108c | 819 | { |
c5aa993b | 820 | type = decode_mod_fund_type (dip->at_mod_fund_type); |
c906108c | 821 | } |
c5aa993b | 822 | else if (dip->at_user_def_type) |
c906108c | 823 | { |
c5aa993b | 824 | if ((type = lookup_utype (dip->at_user_def_type)) == NULL) |
c906108c | 825 | { |
c5aa993b | 826 | type = alloc_utype (dip->at_user_def_type, NULL); |
c906108c SS |
827 | } |
828 | } | |
c5aa993b | 829 | else if (dip->at_mod_u_d_type) |
c906108c | 830 | { |
c5aa993b | 831 | type = decode_mod_u_d_type (dip->at_mod_u_d_type); |
c906108c SS |
832 | } |
833 | else | |
834 | { | |
835 | type = dwarf_fundamental_type (current_objfile, FT_VOID); | |
836 | } | |
837 | return (type); | |
838 | } | |
839 | ||
840 | /* | |
841 | ||
c5aa993b | 842 | LOCAL FUNCTION |
c906108c | 843 | |
c5aa993b | 844 | struct_type -- compute and return the type for a struct or union |
c906108c | 845 | |
c5aa993b | 846 | SYNOPSIS |
c906108c | 847 | |
c5aa993b JM |
848 | static struct type *struct_type (struct dieinfo *dip, char *thisdie, |
849 | char *enddie, struct objfile *objfile) | |
c906108c | 850 | |
c5aa993b | 851 | DESCRIPTION |
c906108c | 852 | |
c5aa993b JM |
853 | Given pointer to a die information structure for a die which |
854 | defines a union or structure (and MUST define one or the other), | |
855 | and pointers to the raw die data that define the range of dies which | |
856 | define the members, compute and return the user defined type for the | |
857 | structure or union. | |
c906108c SS |
858 | */ |
859 | ||
860 | static struct type * | |
fba45db2 KB |
861 | struct_type (struct dieinfo *dip, char *thisdie, char *enddie, |
862 | struct objfile *objfile) | |
c906108c SS |
863 | { |
864 | struct type *type; | |
c5aa993b JM |
865 | struct nextfield |
866 | { | |
867 | struct nextfield *next; | |
868 | struct field field; | |
869 | }; | |
c906108c SS |
870 | struct nextfield *list = NULL; |
871 | struct nextfield *new; | |
872 | int nfields = 0; | |
873 | int n; | |
874 | struct dieinfo mbr; | |
875 | char *nextdie; | |
876 | int anonymous_size; | |
c5aa993b JM |
877 | |
878 | if ((type = lookup_utype (dip->die_ref)) == NULL) | |
c906108c SS |
879 | { |
880 | /* No forward references created an empty type, so install one now */ | |
c5aa993b | 881 | type = alloc_utype (dip->die_ref, NULL); |
c906108c | 882 | } |
c5aa993b JM |
883 | INIT_CPLUS_SPECIFIC (type); |
884 | switch (dip->die_tag) | |
c906108c | 885 | { |
c5aa993b JM |
886 | case TAG_class_type: |
887 | TYPE_CODE (type) = TYPE_CODE_CLASS; | |
888 | break; | |
889 | case TAG_structure_type: | |
890 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
891 | break; | |
892 | case TAG_union_type: | |
893 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
894 | break; | |
895 | default: | |
896 | /* Should never happen */ | |
897 | TYPE_CODE (type) = TYPE_CODE_UNDEF; | |
23136709 KB |
898 | complaint (&symfile_complaints, |
899 | "DIE @ 0x%x \"%s\", missing class, structure, or union tag", | |
900 | DIE_ID, DIE_NAME); | |
c5aa993b | 901 | break; |
c906108c SS |
902 | } |
903 | /* Some compilers try to be helpful by inventing "fake" names for | |
904 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
905 | Thanks, but no thanks... */ | |
c5aa993b JM |
906 | if (dip->at_name != NULL |
907 | && *dip->at_name != '~' | |
908 | && *dip->at_name != '.') | |
c906108c | 909 | { |
c5aa993b JM |
910 | TYPE_TAG_NAME (type) = obconcat (&objfile->type_obstack, |
911 | "", "", dip->at_name); | |
c906108c SS |
912 | } |
913 | /* Use whatever size is known. Zero is a valid size. We might however | |
914 | wish to check has_at_byte_size to make sure that some byte size was | |
915 | given explicitly, but DWARF doesn't specify that explicit sizes of | |
916 | zero have to present, so complaining about missing sizes should | |
917 | probably not be the default. */ | |
c5aa993b JM |
918 | TYPE_LENGTH (type) = dip->at_byte_size; |
919 | thisdie += dip->die_length; | |
c906108c SS |
920 | while (thisdie < enddie) |
921 | { | |
922 | basicdieinfo (&mbr, thisdie, objfile); | |
923 | completedieinfo (&mbr, objfile); | |
924 | if (mbr.die_length <= SIZEOF_DIE_LENGTH) | |
925 | { | |
926 | break; | |
927 | } | |
928 | else if (mbr.at_sibling != 0) | |
929 | { | |
930 | nextdie = dbbase + mbr.at_sibling - dbroff; | |
931 | } | |
932 | else | |
933 | { | |
934 | nextdie = thisdie + mbr.die_length; | |
935 | } | |
936 | switch (mbr.die_tag) | |
937 | { | |
938 | case TAG_member: | |
939 | /* Get space to record the next field's data. */ | |
940 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
c5aa993b | 941 | new->next = list; |
c906108c SS |
942 | list = new; |
943 | /* Save the data. */ | |
c5aa993b JM |
944 | list->field.name = |
945 | obsavestring (mbr.at_name, strlen (mbr.at_name), | |
946 | &objfile->type_obstack); | |
c906108c SS |
947 | FIELD_TYPE (list->field) = decode_die_type (&mbr); |
948 | FIELD_BITPOS (list->field) = 8 * locval (&mbr); | |
01ad7f36 | 949 | FIELD_STATIC_KIND (list->field) = 0; |
c906108c SS |
950 | /* Handle bit fields. */ |
951 | FIELD_BITSIZE (list->field) = mbr.at_bit_size; | |
952 | if (BITS_BIG_ENDIAN) | |
953 | { | |
954 | /* For big endian bits, the at_bit_offset gives the | |
c5aa993b JM |
955 | additional bit offset from the MSB of the containing |
956 | anonymous object to the MSB of the field. We don't | |
957 | have to do anything special since we don't need to | |
958 | know the size of the anonymous object. */ | |
c906108c SS |
959 | FIELD_BITPOS (list->field) += mbr.at_bit_offset; |
960 | } | |
961 | else | |
962 | { | |
963 | /* For little endian bits, we need to have a non-zero | |
c5aa993b JM |
964 | at_bit_size, so that we know we are in fact dealing |
965 | with a bitfield. Compute the bit offset to the MSB | |
966 | of the anonymous object, subtract off the number of | |
967 | bits from the MSB of the field to the MSB of the | |
968 | object, and then subtract off the number of bits of | |
969 | the field itself. The result is the bit offset of | |
970 | the LSB of the field. */ | |
c906108c SS |
971 | if (mbr.at_bit_size > 0) |
972 | { | |
973 | if (mbr.has_at_byte_size) | |
974 | { | |
975 | /* The size of the anonymous object containing | |
c5aa993b JM |
976 | the bit field is explicit, so use the |
977 | indicated size (in bytes). */ | |
c906108c SS |
978 | anonymous_size = mbr.at_byte_size; |
979 | } | |
980 | else | |
981 | { | |
982 | /* The size of the anonymous object containing | |
c5aa993b JM |
983 | the bit field matches the size of an object |
984 | of the bit field's type. DWARF allows | |
985 | at_byte_size to be left out in such cases, as | |
986 | a debug information size optimization. */ | |
987 | anonymous_size = TYPE_LENGTH (list->field.type); | |
c906108c SS |
988 | } |
989 | FIELD_BITPOS (list->field) += | |
990 | anonymous_size * 8 - mbr.at_bit_offset - mbr.at_bit_size; | |
991 | } | |
992 | } | |
993 | nfields++; | |
994 | break; | |
995 | default: | |
996 | process_dies (thisdie, nextdie, objfile); | |
997 | break; | |
998 | } | |
999 | thisdie = nextdie; | |
1000 | } | |
1001 | /* Now create the vector of fields, and record how big it is. We may | |
1002 | not even have any fields, if this DIE was generated due to a reference | |
1003 | to an anonymous structure or union. In this case, TYPE_FLAG_STUB is | |
1004 | set, which clues gdb in to the fact that it needs to search elsewhere | |
1005 | for the full structure definition. */ | |
1006 | if (nfields == 0) | |
1007 | { | |
1008 | TYPE_FLAGS (type) |= TYPE_FLAG_STUB; | |
1009 | } | |
1010 | else | |
1011 | { | |
1012 | TYPE_NFIELDS (type) = nfields; | |
1013 | TYPE_FIELDS (type) = (struct field *) | |
1014 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
1015 | /* Copy the saved-up fields into the field vector. */ | |
c5aa993b | 1016 | for (n = nfields; list; list = list->next) |
c906108c | 1017 | { |
c5aa993b JM |
1018 | TYPE_FIELD (type, --n) = list->field; |
1019 | } | |
c906108c SS |
1020 | } |
1021 | return (type); | |
1022 | } | |
1023 | ||
1024 | /* | |
1025 | ||
c5aa993b | 1026 | LOCAL FUNCTION |
c906108c | 1027 | |
c5aa993b | 1028 | read_structure_scope -- process all dies within struct or union |
c906108c | 1029 | |
c5aa993b | 1030 | SYNOPSIS |
c906108c | 1031 | |
c5aa993b JM |
1032 | static void read_structure_scope (struct dieinfo *dip, |
1033 | char *thisdie, char *enddie, struct objfile *objfile) | |
c906108c | 1034 | |
c5aa993b | 1035 | DESCRIPTION |
c906108c | 1036 | |
c5aa993b JM |
1037 | Called when we find the DIE that starts a structure or union |
1038 | scope (definition) to process all dies that define the members | |
1039 | of the structure or union. DIP is a pointer to the die info | |
1040 | struct for the DIE that names the structure or union. | |
c906108c | 1041 | |
c5aa993b JM |
1042 | NOTES |
1043 | ||
1044 | Note that we need to call struct_type regardless of whether or not | |
1045 | the DIE has an at_name attribute, since it might be an anonymous | |
1046 | structure or union. This gets the type entered into our set of | |
1047 | user defined types. | |
1048 | ||
1049 | However, if the structure is incomplete (an opaque struct/union) | |
1050 | then suppress creating a symbol table entry for it since gdb only | |
1051 | wants to find the one with the complete definition. Note that if | |
1052 | it is complete, we just call new_symbol, which does it's own | |
1053 | checking about whether the struct/union is anonymous or not (and | |
1054 | suppresses creating a symbol table entry itself). | |
c906108c | 1055 | |
c906108c SS |
1056 | */ |
1057 | ||
1058 | static void | |
fba45db2 KB |
1059 | read_structure_scope (struct dieinfo *dip, char *thisdie, char *enddie, |
1060 | struct objfile *objfile) | |
c906108c SS |
1061 | { |
1062 | struct type *type; | |
1063 | struct symbol *sym; | |
c5aa993b | 1064 | |
c906108c | 1065 | type = struct_type (dip, thisdie, enddie, objfile); |
74a9bb82 | 1066 | if (!TYPE_STUB (type)) |
c906108c SS |
1067 | { |
1068 | sym = new_symbol (dip, objfile); | |
1069 | if (sym != NULL) | |
1070 | { | |
1071 | SYMBOL_TYPE (sym) = type; | |
1072 | if (cu_language == language_cplus) | |
1073 | { | |
1074 | synthesize_typedef (dip, objfile, type); | |
1075 | } | |
1076 | } | |
1077 | } | |
1078 | } | |
1079 | ||
1080 | /* | |
1081 | ||
c5aa993b | 1082 | LOCAL FUNCTION |
c906108c | 1083 | |
c5aa993b | 1084 | decode_array_element_type -- decode type of the array elements |
c906108c | 1085 | |
c5aa993b | 1086 | SYNOPSIS |
c906108c | 1087 | |
c5aa993b | 1088 | static struct type *decode_array_element_type (char *scan, char *end) |
c906108c | 1089 | |
c5aa993b | 1090 | DESCRIPTION |
c906108c | 1091 | |
c5aa993b JM |
1092 | As the last step in decoding the array subscript information for an |
1093 | array DIE, we need to decode the type of the array elements. We are | |
1094 | passed a pointer to this last part of the subscript information and | |
1095 | must return the appropriate type. If the type attribute is not | |
1096 | recognized, just warn about the problem and return type int. | |
c906108c SS |
1097 | */ |
1098 | ||
1099 | static struct type * | |
fba45db2 | 1100 | decode_array_element_type (char *scan) |
c906108c SS |
1101 | { |
1102 | struct type *typep; | |
1103 | DIE_REF die_ref; | |
1104 | unsigned short attribute; | |
1105 | unsigned short fundtype; | |
1106 | int nbytes; | |
c5aa993b | 1107 | |
c906108c SS |
1108 | attribute = target_to_host (scan, SIZEOF_ATTRIBUTE, GET_UNSIGNED, |
1109 | current_objfile); | |
1110 | scan += SIZEOF_ATTRIBUTE; | |
1111 | if ((nbytes = attribute_size (attribute)) == -1) | |
1112 | { | |
23136709 | 1113 | bad_array_element_type_complaint (DIE_ID, DIE_NAME, attribute); |
c906108c SS |
1114 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1115 | } | |
1116 | else | |
1117 | { | |
1118 | switch (attribute) | |
1119 | { | |
c5aa993b JM |
1120 | case AT_fund_type: |
1121 | fundtype = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1122 | current_objfile); | |
1123 | typep = decode_fund_type (fundtype); | |
1124 | break; | |
1125 | case AT_mod_fund_type: | |
1126 | typep = decode_mod_fund_type (scan); | |
1127 | break; | |
1128 | case AT_user_def_type: | |
1129 | die_ref = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1130 | current_objfile); | |
1131 | if ((typep = lookup_utype (die_ref)) == NULL) | |
1132 | { | |
1133 | typep = alloc_utype (die_ref, NULL); | |
1134 | } | |
1135 | break; | |
1136 | case AT_mod_u_d_type: | |
1137 | typep = decode_mod_u_d_type (scan); | |
1138 | break; | |
1139 | default: | |
23136709 | 1140 | bad_array_element_type_complaint (DIE_ID, DIE_NAME, attribute); |
c5aa993b JM |
1141 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1142 | break; | |
1143 | } | |
c906108c SS |
1144 | } |
1145 | return (typep); | |
1146 | } | |
1147 | ||
1148 | /* | |
1149 | ||
c5aa993b | 1150 | LOCAL FUNCTION |
c906108c | 1151 | |
c5aa993b | 1152 | decode_subscript_data_item -- decode array subscript item |
c906108c | 1153 | |
c5aa993b | 1154 | SYNOPSIS |
c906108c | 1155 | |
c5aa993b JM |
1156 | static struct type * |
1157 | decode_subscript_data_item (char *scan, char *end) | |
c906108c | 1158 | |
c5aa993b | 1159 | DESCRIPTION |
c906108c | 1160 | |
c5aa993b JM |
1161 | The array subscripts and the data type of the elements of an |
1162 | array are described by a list of data items, stored as a block | |
1163 | of contiguous bytes. There is a data item describing each array | |
1164 | dimension, and a final data item describing the element type. | |
1165 | The data items are ordered the same as their appearance in the | |
1166 | source (I.E. leftmost dimension first, next to leftmost second, | |
1167 | etc). | |
c906108c | 1168 | |
c5aa993b JM |
1169 | The data items describing each array dimension consist of four |
1170 | parts: (1) a format specifier, (2) type type of the subscript | |
1171 | index, (3) a description of the low bound of the array dimension, | |
1172 | and (4) a description of the high bound of the array dimension. | |
c906108c | 1173 | |
c5aa993b JM |
1174 | The last data item is the description of the type of each of |
1175 | the array elements. | |
c906108c | 1176 | |
c5aa993b JM |
1177 | We are passed a pointer to the start of the block of bytes |
1178 | containing the remaining data items, and a pointer to the first | |
1179 | byte past the data. This function recursively decodes the | |
1180 | remaining data items and returns a type. | |
c906108c | 1181 | |
c5aa993b JM |
1182 | If we somehow fail to decode some data, we complain about it |
1183 | and return a type "array of int". | |
c906108c | 1184 | |
c5aa993b JM |
1185 | BUGS |
1186 | FIXME: This code only implements the forms currently used | |
1187 | by the AT&T and GNU C compilers. | |
c906108c | 1188 | |
c5aa993b JM |
1189 | The end pointer is supplied for error checking, maybe we should |
1190 | use it for that... | |
c906108c SS |
1191 | */ |
1192 | ||
1193 | static struct type * | |
fba45db2 | 1194 | decode_subscript_data_item (char *scan, char *end) |
c906108c SS |
1195 | { |
1196 | struct type *typep = NULL; /* Array type we are building */ | |
1197 | struct type *nexttype; /* Type of each element (may be array) */ | |
1198 | struct type *indextype; /* Type of this index */ | |
1199 | struct type *rangetype; | |
1200 | unsigned int format; | |
1201 | unsigned short fundtype; | |
1202 | unsigned long lowbound; | |
1203 | unsigned long highbound; | |
1204 | int nbytes; | |
c5aa993b | 1205 | |
c906108c SS |
1206 | format = target_to_host (scan, SIZEOF_FORMAT_SPECIFIER, GET_UNSIGNED, |
1207 | current_objfile); | |
1208 | scan += SIZEOF_FORMAT_SPECIFIER; | |
1209 | switch (format) | |
1210 | { | |
1211 | case FMT_ET: | |
1212 | typep = decode_array_element_type (scan); | |
1213 | break; | |
1214 | case FMT_FT_C_C: | |
1215 | fundtype = target_to_host (scan, SIZEOF_FMT_FT, GET_UNSIGNED, | |
1216 | current_objfile); | |
1217 | indextype = decode_fund_type (fundtype); | |
1218 | scan += SIZEOF_FMT_FT; | |
1219 | nbytes = TARGET_FT_LONG_SIZE (current_objfile); | |
1220 | lowbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1221 | scan += nbytes; | |
1222 | highbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1223 | scan += nbytes; | |
1224 | nexttype = decode_subscript_data_item (scan, end); | |
1225 | if (nexttype == NULL) | |
1226 | { | |
1227 | /* Munged subscript data or other problem, fake it. */ | |
23136709 KB |
1228 | complaint (&symfile_complaints, |
1229 | "DIE @ 0x%x \"%s\", can't decode subscript data items", | |
1230 | DIE_ID, DIE_NAME); | |
c906108c SS |
1231 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1232 | } | |
1233 | rangetype = create_range_type ((struct type *) NULL, indextype, | |
c5aa993b | 1234 | lowbound, highbound); |
c906108c SS |
1235 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); |
1236 | break; | |
1237 | case FMT_FT_C_X: | |
1238 | case FMT_FT_X_C: | |
1239 | case FMT_FT_X_X: | |
1240 | case FMT_UT_C_C: | |
1241 | case FMT_UT_C_X: | |
1242 | case FMT_UT_X_C: | |
1243 | case FMT_UT_X_X: | |
23136709 KB |
1244 | complaint (&symfile_complaints, |
1245 | "DIE @ 0x%x \"%s\", array subscript format 0x%x not handled yet", | |
1246 | DIE_ID, DIE_NAME, format); | |
c906108c SS |
1247 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1248 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1249 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
1250 | break; | |
1251 | default: | |
23136709 KB |
1252 | complaint (&symfile_complaints, |
1253 | "DIE @ 0x%x \"%s\", unknown array subscript format %x", DIE_ID, | |
1254 | DIE_NAME, format); | |
c906108c SS |
1255 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1256 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1257 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
1258 | break; | |
1259 | } | |
1260 | return (typep); | |
1261 | } | |
1262 | ||
1263 | /* | |
1264 | ||
c5aa993b | 1265 | LOCAL FUNCTION |
c906108c | 1266 | |
c5aa993b | 1267 | dwarf_read_array_type -- read TAG_array_type DIE |
c906108c | 1268 | |
c5aa993b | 1269 | SYNOPSIS |
c906108c | 1270 | |
c5aa993b | 1271 | static void dwarf_read_array_type (struct dieinfo *dip) |
c906108c | 1272 | |
c5aa993b | 1273 | DESCRIPTION |
c906108c | 1274 | |
c5aa993b JM |
1275 | Extract all information from a TAG_array_type DIE and add to |
1276 | the user defined type vector. | |
c906108c SS |
1277 | */ |
1278 | ||
1279 | static void | |
fba45db2 | 1280 | dwarf_read_array_type (struct dieinfo *dip) |
c906108c SS |
1281 | { |
1282 | struct type *type; | |
1283 | struct type *utype; | |
1284 | char *sub; | |
1285 | char *subend; | |
1286 | unsigned short blocksz; | |
1287 | int nbytes; | |
c5aa993b JM |
1288 | |
1289 | if (dip->at_ordering != ORD_row_major) | |
c906108c SS |
1290 | { |
1291 | /* FIXME: Can gdb even handle column major arrays? */ | |
23136709 KB |
1292 | complaint (&symfile_complaints, |
1293 | "DIE @ 0x%x \"%s\", array not row major; not handled correctly", | |
1294 | DIE_ID, DIE_NAME); | |
c906108c | 1295 | } |
c5aa993b | 1296 | if ((sub = dip->at_subscr_data) != NULL) |
c906108c SS |
1297 | { |
1298 | nbytes = attribute_size (AT_subscr_data); | |
1299 | blocksz = target_to_host (sub, nbytes, GET_UNSIGNED, current_objfile); | |
1300 | subend = sub + nbytes + blocksz; | |
1301 | sub += nbytes; | |
1302 | type = decode_subscript_data_item (sub, subend); | |
c5aa993b | 1303 | if ((utype = lookup_utype (dip->die_ref)) == NULL) |
c906108c SS |
1304 | { |
1305 | /* Install user defined type that has not been referenced yet. */ | |
c5aa993b | 1306 | alloc_utype (dip->die_ref, type); |
c906108c SS |
1307 | } |
1308 | else if (TYPE_CODE (utype) == TYPE_CODE_UNDEF) | |
1309 | { | |
1310 | /* Ick! A forward ref has already generated a blank type in our | |
1311 | slot, and this type probably already has things pointing to it | |
1312 | (which is what caused it to be created in the first place). | |
1313 | If it's just a place holder we can plop our fully defined type | |
1314 | on top of it. We can't recover the space allocated for our | |
1315 | new type since it might be on an obstack, but we could reuse | |
1316 | it if we kept a list of them, but it might not be worth it | |
1317 | (FIXME). */ | |
1318 | *utype = *type; | |
1319 | } | |
1320 | else | |
1321 | { | |
1322 | /* Double ick! Not only is a type already in our slot, but | |
1323 | someone has decorated it. Complain and leave it alone. */ | |
23136709 | 1324 | dup_user_type_definition_complaint (DIE_ID, DIE_NAME); |
c906108c SS |
1325 | } |
1326 | } | |
1327 | } | |
1328 | ||
1329 | /* | |
1330 | ||
c5aa993b | 1331 | LOCAL FUNCTION |
c906108c | 1332 | |
c5aa993b | 1333 | read_tag_pointer_type -- read TAG_pointer_type DIE |
c906108c | 1334 | |
c5aa993b | 1335 | SYNOPSIS |
c906108c | 1336 | |
c5aa993b | 1337 | static void read_tag_pointer_type (struct dieinfo *dip) |
c906108c | 1338 | |
c5aa993b | 1339 | DESCRIPTION |
c906108c | 1340 | |
c5aa993b JM |
1341 | Extract all information from a TAG_pointer_type DIE and add to |
1342 | the user defined type vector. | |
c906108c SS |
1343 | */ |
1344 | ||
1345 | static void | |
fba45db2 | 1346 | read_tag_pointer_type (struct dieinfo *dip) |
c906108c SS |
1347 | { |
1348 | struct type *type; | |
1349 | struct type *utype; | |
c5aa993b | 1350 | |
c906108c | 1351 | type = decode_die_type (dip); |
c5aa993b | 1352 | if ((utype = lookup_utype (dip->die_ref)) == NULL) |
c906108c SS |
1353 | { |
1354 | utype = lookup_pointer_type (type); | |
c5aa993b | 1355 | alloc_utype (dip->die_ref, utype); |
c906108c SS |
1356 | } |
1357 | else | |
1358 | { | |
1359 | TYPE_TARGET_TYPE (utype) = type; | |
1360 | TYPE_POINTER_TYPE (type) = utype; | |
1361 | ||
1362 | /* We assume the machine has only one representation for pointers! */ | |
1363 | /* FIXME: Possably a poor assumption */ | |
c5aa993b | 1364 | TYPE_LENGTH (utype) = TARGET_PTR_BIT / TARGET_CHAR_BIT; |
c906108c SS |
1365 | TYPE_CODE (utype) = TYPE_CODE_PTR; |
1366 | } | |
1367 | } | |
1368 | ||
1369 | /* | |
1370 | ||
c5aa993b | 1371 | LOCAL FUNCTION |
c906108c | 1372 | |
c5aa993b | 1373 | read_tag_string_type -- read TAG_string_type DIE |
c906108c | 1374 | |
c5aa993b | 1375 | SYNOPSIS |
c906108c | 1376 | |
c5aa993b | 1377 | static void read_tag_string_type (struct dieinfo *dip) |
c906108c | 1378 | |
c5aa993b | 1379 | DESCRIPTION |
c906108c | 1380 | |
c5aa993b JM |
1381 | Extract all information from a TAG_string_type DIE and add to |
1382 | the user defined type vector. It isn't really a user defined | |
1383 | type, but it behaves like one, with other DIE's using an | |
1384 | AT_user_def_type attribute to reference it. | |
c906108c SS |
1385 | */ |
1386 | ||
1387 | static void | |
fba45db2 | 1388 | read_tag_string_type (struct dieinfo *dip) |
c906108c SS |
1389 | { |
1390 | struct type *utype; | |
1391 | struct type *indextype; | |
1392 | struct type *rangetype; | |
1393 | unsigned long lowbound = 0; | |
1394 | unsigned long highbound; | |
1395 | ||
c5aa993b | 1396 | if (dip->has_at_byte_size) |
c906108c SS |
1397 | { |
1398 | /* A fixed bounds string */ | |
c5aa993b | 1399 | highbound = dip->at_byte_size - 1; |
c906108c SS |
1400 | } |
1401 | else | |
1402 | { | |
1403 | /* A varying length string. Stub for now. (FIXME) */ | |
1404 | highbound = 1; | |
1405 | } | |
1406 | indextype = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1407 | rangetype = create_range_type ((struct type *) NULL, indextype, lowbound, | |
1408 | highbound); | |
c5aa993b JM |
1409 | |
1410 | utype = lookup_utype (dip->die_ref); | |
c906108c SS |
1411 | if (utype == NULL) |
1412 | { | |
1413 | /* No type defined, go ahead and create a blank one to use. */ | |
c5aa993b | 1414 | utype = alloc_utype (dip->die_ref, (struct type *) NULL); |
c906108c SS |
1415 | } |
1416 | else | |
1417 | { | |
1418 | /* Already a type in our slot due to a forward reference. Make sure it | |
c5aa993b | 1419 | is a blank one. If not, complain and leave it alone. */ |
c906108c SS |
1420 | if (TYPE_CODE (utype) != TYPE_CODE_UNDEF) |
1421 | { | |
23136709 | 1422 | dup_user_type_definition_complaint (DIE_ID, DIE_NAME); |
c906108c SS |
1423 | return; |
1424 | } | |
1425 | } | |
1426 | ||
1427 | /* Create the string type using the blank type we either found or created. */ | |
1428 | utype = create_string_type (utype, rangetype); | |
1429 | } | |
1430 | ||
1431 | /* | |
1432 | ||
c5aa993b | 1433 | LOCAL FUNCTION |
c906108c | 1434 | |
c5aa993b | 1435 | read_subroutine_type -- process TAG_subroutine_type dies |
c906108c | 1436 | |
c5aa993b | 1437 | SYNOPSIS |
c906108c | 1438 | |
c5aa993b JM |
1439 | static void read_subroutine_type (struct dieinfo *dip, char thisdie, |
1440 | char *enddie) | |
c906108c | 1441 | |
c5aa993b | 1442 | DESCRIPTION |
c906108c | 1443 | |
c5aa993b | 1444 | Handle DIES due to C code like: |
c906108c | 1445 | |
c5aa993b JM |
1446 | struct foo { |
1447 | int (*funcp)(int a, long l); (Generates TAG_subroutine_type DIE) | |
1448 | int b; | |
1449 | }; | |
c906108c | 1450 | |
c5aa993b | 1451 | NOTES |
c906108c | 1452 | |
c5aa993b JM |
1453 | The parameter DIES are currently ignored. See if gdb has a way to |
1454 | include this info in it's type system, and decode them if so. Is | |
1455 | this what the type structure's "arg_types" field is for? (FIXME) | |
c906108c SS |
1456 | */ |
1457 | ||
1458 | static void | |
fba45db2 | 1459 | read_subroutine_type (struct dieinfo *dip, char *thisdie, char *enddie) |
c906108c SS |
1460 | { |
1461 | struct type *type; /* Type that this function returns */ | |
1462 | struct type *ftype; /* Function that returns above type */ | |
c5aa993b | 1463 | |
c906108c SS |
1464 | /* Decode the type that this subroutine returns */ |
1465 | ||
1466 | type = decode_die_type (dip); | |
1467 | ||
1468 | /* Check to see if we already have a partially constructed user | |
1469 | defined type for this DIE, from a forward reference. */ | |
1470 | ||
c5aa993b | 1471 | if ((ftype = lookup_utype (dip->die_ref)) == NULL) |
c906108c SS |
1472 | { |
1473 | /* This is the first reference to one of these types. Make | |
c5aa993b | 1474 | a new one and place it in the user defined types. */ |
c906108c | 1475 | ftype = lookup_function_type (type); |
c5aa993b | 1476 | alloc_utype (dip->die_ref, ftype); |
c906108c SS |
1477 | } |
1478 | else if (TYPE_CODE (ftype) == TYPE_CODE_UNDEF) | |
1479 | { | |
1480 | /* We have an existing partially constructed type, so bash it | |
c5aa993b | 1481 | into the correct type. */ |
c906108c SS |
1482 | TYPE_TARGET_TYPE (ftype) = type; |
1483 | TYPE_LENGTH (ftype) = 1; | |
1484 | TYPE_CODE (ftype) = TYPE_CODE_FUNC; | |
1485 | } | |
1486 | else | |
1487 | { | |
23136709 | 1488 | dup_user_type_definition_complaint (DIE_ID, DIE_NAME); |
c906108c SS |
1489 | } |
1490 | } | |
1491 | ||
1492 | /* | |
1493 | ||
c5aa993b | 1494 | LOCAL FUNCTION |
c906108c | 1495 | |
c5aa993b | 1496 | read_enumeration -- process dies which define an enumeration |
c906108c | 1497 | |
c5aa993b | 1498 | SYNOPSIS |
c906108c | 1499 | |
c5aa993b JM |
1500 | static void read_enumeration (struct dieinfo *dip, char *thisdie, |
1501 | char *enddie, struct objfile *objfile) | |
c906108c | 1502 | |
c5aa993b | 1503 | DESCRIPTION |
c906108c | 1504 | |
c5aa993b JM |
1505 | Given a pointer to a die which begins an enumeration, process all |
1506 | the dies that define the members of the enumeration. | |
c906108c | 1507 | |
c5aa993b | 1508 | NOTES |
c906108c | 1509 | |
c5aa993b JM |
1510 | Note that we need to call enum_type regardless of whether or not we |
1511 | have a symbol, since we might have an enum without a tag name (thus | |
1512 | no symbol for the tagname). | |
c906108c SS |
1513 | */ |
1514 | ||
1515 | static void | |
fba45db2 KB |
1516 | read_enumeration (struct dieinfo *dip, char *thisdie, char *enddie, |
1517 | struct objfile *objfile) | |
c906108c SS |
1518 | { |
1519 | struct type *type; | |
1520 | struct symbol *sym; | |
c5aa993b | 1521 | |
c906108c SS |
1522 | type = enum_type (dip, objfile); |
1523 | sym = new_symbol (dip, objfile); | |
1524 | if (sym != NULL) | |
1525 | { | |
1526 | SYMBOL_TYPE (sym) = type; | |
1527 | if (cu_language == language_cplus) | |
1528 | { | |
1529 | synthesize_typedef (dip, objfile, type); | |
1530 | } | |
1531 | } | |
1532 | } | |
1533 | ||
1534 | /* | |
1535 | ||
c5aa993b | 1536 | LOCAL FUNCTION |
c906108c | 1537 | |
c5aa993b | 1538 | enum_type -- decode and return a type for an enumeration |
c906108c | 1539 | |
c5aa993b | 1540 | SYNOPSIS |
c906108c | 1541 | |
c5aa993b | 1542 | static type *enum_type (struct dieinfo *dip, struct objfile *objfile) |
c906108c | 1543 | |
c5aa993b | 1544 | DESCRIPTION |
c906108c | 1545 | |
c5aa993b JM |
1546 | Given a pointer to a die information structure for the die which |
1547 | starts an enumeration, process all the dies that define the members | |
1548 | of the enumeration and return a type pointer for the enumeration. | |
c906108c | 1549 | |
c5aa993b JM |
1550 | At the same time, for each member of the enumeration, create a |
1551 | symbol for it with namespace VAR_NAMESPACE and class LOC_CONST, | |
1552 | and give it the type of the enumeration itself. | |
c906108c | 1553 | |
c5aa993b | 1554 | NOTES |
c906108c | 1555 | |
c5aa993b JM |
1556 | Note that the DWARF specification explicitly mandates that enum |
1557 | constants occur in reverse order from the source program order, | |
1558 | for "consistency" and because this ordering is easier for many | |
1559 | compilers to generate. (Draft 6, sec 3.8.5, Enumeration type | |
1560 | Entries). Because gdb wants to see the enum members in program | |
1561 | source order, we have to ensure that the order gets reversed while | |
1562 | we are processing them. | |
c906108c SS |
1563 | */ |
1564 | ||
1565 | static struct type * | |
fba45db2 | 1566 | enum_type (struct dieinfo *dip, struct objfile *objfile) |
c906108c SS |
1567 | { |
1568 | struct type *type; | |
c5aa993b JM |
1569 | struct nextfield |
1570 | { | |
1571 | struct nextfield *next; | |
1572 | struct field field; | |
1573 | }; | |
c906108c SS |
1574 | struct nextfield *list = NULL; |
1575 | struct nextfield *new; | |
1576 | int nfields = 0; | |
1577 | int n; | |
1578 | char *scan; | |
1579 | char *listend; | |
1580 | unsigned short blocksz; | |
1581 | struct symbol *sym; | |
1582 | int nbytes; | |
1583 | int unsigned_enum = 1; | |
c5aa993b JM |
1584 | |
1585 | if ((type = lookup_utype (dip->die_ref)) == NULL) | |
c906108c SS |
1586 | { |
1587 | /* No forward references created an empty type, so install one now */ | |
c5aa993b | 1588 | type = alloc_utype (dip->die_ref, NULL); |
c906108c SS |
1589 | } |
1590 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
1591 | /* Some compilers try to be helpful by inventing "fake" names for | |
1592 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1593 | Thanks, but no thanks... */ | |
c5aa993b JM |
1594 | if (dip->at_name != NULL |
1595 | && *dip->at_name != '~' | |
1596 | && *dip->at_name != '.') | |
c906108c | 1597 | { |
c5aa993b JM |
1598 | TYPE_TAG_NAME (type) = obconcat (&objfile->type_obstack, |
1599 | "", "", dip->at_name); | |
c906108c | 1600 | } |
c5aa993b | 1601 | if (dip->at_byte_size != 0) |
c906108c | 1602 | { |
c5aa993b | 1603 | TYPE_LENGTH (type) = dip->at_byte_size; |
c906108c | 1604 | } |
c5aa993b | 1605 | if ((scan = dip->at_element_list) != NULL) |
c906108c | 1606 | { |
c5aa993b | 1607 | if (dip->short_element_list) |
c906108c SS |
1608 | { |
1609 | nbytes = attribute_size (AT_short_element_list); | |
1610 | } | |
1611 | else | |
1612 | { | |
1613 | nbytes = attribute_size (AT_element_list); | |
1614 | } | |
1615 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); | |
1616 | listend = scan + nbytes + blocksz; | |
1617 | scan += nbytes; | |
1618 | while (scan < listend) | |
1619 | { | |
1620 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
c5aa993b | 1621 | new->next = list; |
c906108c SS |
1622 | list = new; |
1623 | FIELD_TYPE (list->field) = NULL; | |
1624 | FIELD_BITSIZE (list->field) = 0; | |
01ad7f36 | 1625 | FIELD_STATIC_KIND (list->field) = 0; |
c906108c SS |
1626 | FIELD_BITPOS (list->field) = |
1627 | target_to_host (scan, TARGET_FT_LONG_SIZE (objfile), GET_SIGNED, | |
1628 | objfile); | |
1629 | scan += TARGET_FT_LONG_SIZE (objfile); | |
c5aa993b JM |
1630 | list->field.name = obsavestring (scan, strlen (scan), |
1631 | &objfile->type_obstack); | |
c906108c SS |
1632 | scan += strlen (scan) + 1; |
1633 | nfields++; | |
1634 | /* Handcraft a new symbol for this enum member. */ | |
1635 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, | |
1636 | sizeof (struct symbol)); | |
1637 | memset (sym, 0, sizeof (struct symbol)); | |
c5aa993b | 1638 | SYMBOL_NAME (sym) = create_name (list->field.name, |
c906108c SS |
1639 | &objfile->symbol_obstack); |
1640 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); | |
1641 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
1642 | SYMBOL_CLASS (sym) = LOC_CONST; | |
1643 | SYMBOL_TYPE (sym) = type; | |
1644 | SYMBOL_VALUE (sym) = FIELD_BITPOS (list->field); | |
1645 | if (SYMBOL_VALUE (sym) < 0) | |
1646 | unsigned_enum = 0; | |
1647 | add_symbol_to_list (sym, list_in_scope); | |
1648 | } | |
1649 | /* Now create the vector of fields, and record how big it is. This is | |
c5aa993b JM |
1650 | where we reverse the order, by pulling the members off the list in |
1651 | reverse order from how they were inserted. If we have no fields | |
1652 | (this is apparently possible in C++) then skip building a field | |
1653 | vector. */ | |
c906108c SS |
1654 | if (nfields > 0) |
1655 | { | |
1656 | if (unsigned_enum) | |
1657 | TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED; | |
1658 | TYPE_NFIELDS (type) = nfields; | |
1659 | TYPE_FIELDS (type) = (struct field *) | |
1660 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct field) * nfields); | |
1661 | /* Copy the saved-up fields into the field vector. */ | |
c5aa993b | 1662 | for (n = 0; (n < nfields) && (list != NULL); list = list->next) |
c906108c | 1663 | { |
c5aa993b JM |
1664 | TYPE_FIELD (type, n++) = list->field; |
1665 | } | |
c906108c SS |
1666 | } |
1667 | } | |
1668 | return (type); | |
1669 | } | |
1670 | ||
1671 | /* | |
1672 | ||
c5aa993b | 1673 | LOCAL FUNCTION |
c906108c | 1674 | |
c5aa993b | 1675 | read_func_scope -- process all dies within a function scope |
c906108c | 1676 | |
c5aa993b | 1677 | DESCRIPTION |
c906108c | 1678 | |
c5aa993b JM |
1679 | Process all dies within a given function scope. We are passed |
1680 | a die information structure pointer DIP for the die which | |
1681 | starts the function scope, and pointers into the raw die data | |
1682 | that define the dies within the function scope. | |
1683 | ||
1684 | For now, we ignore lexical block scopes within the function. | |
1685 | The problem is that AT&T cc does not define a DWARF lexical | |
1686 | block scope for the function itself, while gcc defines a | |
1687 | lexical block scope for the function. We need to think about | |
1688 | how to handle this difference, or if it is even a problem. | |
1689 | (FIXME) | |
c906108c SS |
1690 | */ |
1691 | ||
1692 | static void | |
fba45db2 KB |
1693 | read_func_scope (struct dieinfo *dip, char *thisdie, char *enddie, |
1694 | struct objfile *objfile) | |
c906108c SS |
1695 | { |
1696 | register struct context_stack *new; | |
c5aa993b | 1697 | |
c906108c SS |
1698 | /* AT_name is absent if the function is described with an |
1699 | AT_abstract_origin tag. | |
1700 | Ignore the function description for now to avoid GDB core dumps. | |
1701 | FIXME: Add code to handle AT_abstract_origin tags properly. */ | |
c5aa993b | 1702 | if (dip->at_name == NULL) |
c906108c | 1703 | { |
23136709 KB |
1704 | complaint (&symfile_complaints, "DIE @ 0x%x, AT_name tag missing", |
1705 | DIE_ID); | |
c906108c SS |
1706 | return; |
1707 | } | |
1708 | ||
c5aa993b JM |
1709 | if (objfile->ei.entry_point >= dip->at_low_pc && |
1710 | objfile->ei.entry_point < dip->at_high_pc) | |
c906108c | 1711 | { |
c5aa993b JM |
1712 | objfile->ei.entry_func_lowpc = dip->at_low_pc; |
1713 | objfile->ei.entry_func_highpc = dip->at_high_pc; | |
c906108c | 1714 | } |
c5aa993b JM |
1715 | new = push_context (0, dip->at_low_pc); |
1716 | new->name = new_symbol (dip, objfile); | |
c906108c | 1717 | list_in_scope = &local_symbols; |
c5aa993b | 1718 | process_dies (thisdie + dip->die_length, enddie, objfile); |
c906108c SS |
1719 | new = pop_context (); |
1720 | /* Make a block for the local symbols within. */ | |
c5aa993b JM |
1721 | finish_block (new->name, &local_symbols, new->old_blocks, |
1722 | new->start_addr, dip->at_high_pc, objfile); | |
c906108c SS |
1723 | list_in_scope = &file_symbols; |
1724 | } | |
1725 | ||
1726 | ||
1727 | /* | |
1728 | ||
c5aa993b | 1729 | LOCAL FUNCTION |
c906108c | 1730 | |
c5aa993b | 1731 | handle_producer -- process the AT_producer attribute |
c906108c | 1732 | |
c5aa993b | 1733 | DESCRIPTION |
c906108c | 1734 | |
c5aa993b JM |
1735 | Perform any operations that depend on finding a particular |
1736 | AT_producer attribute. | |
c906108c SS |
1737 | |
1738 | */ | |
1739 | ||
1740 | static void | |
fba45db2 | 1741 | handle_producer (char *producer) |
c906108c SS |
1742 | { |
1743 | ||
1744 | /* If this compilation unit was compiled with g++ or gcc, then set the | |
1745 | processing_gcc_compilation flag. */ | |
1746 | ||
1747 | if (STREQN (producer, GCC_PRODUCER, strlen (GCC_PRODUCER))) | |
1748 | { | |
1749 | char version = producer[strlen (GCC_PRODUCER)]; | |
1750 | processing_gcc_compilation = (version == '2' ? 2 : 1); | |
1751 | } | |
1752 | else | |
1753 | { | |
1754 | processing_gcc_compilation = | |
db034ac5 | 1755 | STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER)); |
c906108c SS |
1756 | } |
1757 | ||
1758 | /* Select a demangling style if we can identify the producer and if | |
1759 | the current style is auto. We leave the current style alone if it | |
1760 | is not auto. We also leave the demangling style alone if we find a | |
1761 | gcc (cc1) producer, as opposed to a g++ (cc1plus) producer. */ | |
1762 | ||
1763 | if (AUTO_DEMANGLING) | |
1764 | { | |
1765 | if (STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER))) | |
1766 | { | |
8052a17a JM |
1767 | #if 0 |
1768 | /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't | |
1769 | know whether it will use the old style or v3 mangling. */ | |
c906108c | 1770 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); |
8052a17a | 1771 | #endif |
c906108c SS |
1772 | } |
1773 | else if (STREQN (producer, LCC_PRODUCER, strlen (LCC_PRODUCER))) | |
1774 | { | |
1775 | set_demangling_style (LUCID_DEMANGLING_STYLE_STRING); | |
1776 | } | |
1777 | } | |
1778 | } | |
1779 | ||
1780 | ||
1781 | /* | |
1782 | ||
c5aa993b | 1783 | LOCAL FUNCTION |
c906108c | 1784 | |
c5aa993b | 1785 | read_file_scope -- process all dies within a file scope |
c906108c | 1786 | |
c5aa993b JM |
1787 | DESCRIPTION |
1788 | ||
1789 | Process all dies within a given file scope. We are passed a | |
1790 | pointer to the die information structure for the die which | |
1791 | starts the file scope, and pointers into the raw die data which | |
1792 | mark the range of dies within the file scope. | |
c906108c | 1793 | |
c5aa993b JM |
1794 | When the partial symbol table is built, the file offset for the line |
1795 | number table for each compilation unit is saved in the partial symbol | |
1796 | table entry for that compilation unit. As the symbols for each | |
1797 | compilation unit are read, the line number table is read into memory | |
1798 | and the variable lnbase is set to point to it. Thus all we have to | |
1799 | do is use lnbase to access the line number table for the current | |
1800 | compilation unit. | |
c906108c SS |
1801 | */ |
1802 | ||
1803 | static void | |
fba45db2 KB |
1804 | read_file_scope (struct dieinfo *dip, char *thisdie, char *enddie, |
1805 | struct objfile *objfile) | |
c906108c SS |
1806 | { |
1807 | struct cleanup *back_to; | |
1808 | struct symtab *symtab; | |
c5aa993b JM |
1809 | |
1810 | if (objfile->ei.entry_point >= dip->at_low_pc && | |
1811 | objfile->ei.entry_point < dip->at_high_pc) | |
c906108c | 1812 | { |
c5aa993b JM |
1813 | objfile->ei.entry_file_lowpc = dip->at_low_pc; |
1814 | objfile->ei.entry_file_highpc = dip->at_high_pc; | |
c906108c SS |
1815 | } |
1816 | set_cu_language (dip); | |
c5aa993b | 1817 | if (dip->at_producer != NULL) |
c906108c | 1818 | { |
c5aa993b | 1819 | handle_producer (dip->at_producer); |
c906108c SS |
1820 | } |
1821 | numutypes = (enddie - thisdie) / 4; | |
1822 | utypes = (struct type **) xmalloc (numutypes * sizeof (struct type *)); | |
1823 | back_to = make_cleanup (free_utypes, NULL); | |
1824 | memset (utypes, 0, numutypes * sizeof (struct type *)); | |
1825 | memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *)); | |
c5aa993b | 1826 | start_symtab (dip->at_name, dip->at_comp_dir, dip->at_low_pc); |
c906108c SS |
1827 | record_debugformat ("DWARF 1"); |
1828 | decode_line_numbers (lnbase); | |
c5aa993b | 1829 | process_dies (thisdie + dip->die_length, enddie, objfile); |
c906108c | 1830 | |
c5aa993b | 1831 | symtab = end_symtab (dip->at_high_pc, objfile, 0); |
c906108c SS |
1832 | if (symtab != NULL) |
1833 | { | |
c5aa993b JM |
1834 | symtab->language = cu_language; |
1835 | } | |
c906108c SS |
1836 | do_cleanups (back_to); |
1837 | } | |
1838 | ||
1839 | /* | |
1840 | ||
c5aa993b | 1841 | LOCAL FUNCTION |
c906108c | 1842 | |
c5aa993b | 1843 | process_dies -- process a range of DWARF Information Entries |
c906108c | 1844 | |
c5aa993b | 1845 | SYNOPSIS |
c906108c | 1846 | |
c5aa993b JM |
1847 | static void process_dies (char *thisdie, char *enddie, |
1848 | struct objfile *objfile) | |
c906108c | 1849 | |
c5aa993b | 1850 | DESCRIPTION |
c906108c | 1851 | |
c5aa993b JM |
1852 | Process all DIE's in a specified range. May be (and almost |
1853 | certainly will be) called recursively. | |
c906108c SS |
1854 | */ |
1855 | ||
1856 | static void | |
fba45db2 | 1857 | process_dies (char *thisdie, char *enddie, struct objfile *objfile) |
c906108c SS |
1858 | { |
1859 | char *nextdie; | |
1860 | struct dieinfo di; | |
c5aa993b | 1861 | |
c906108c SS |
1862 | while (thisdie < enddie) |
1863 | { | |
1864 | basicdieinfo (&di, thisdie, objfile); | |
1865 | if (di.die_length < SIZEOF_DIE_LENGTH) | |
1866 | { | |
1867 | break; | |
1868 | } | |
1869 | else if (di.die_tag == TAG_padding) | |
1870 | { | |
1871 | nextdie = thisdie + di.die_length; | |
1872 | } | |
1873 | else | |
1874 | { | |
1875 | completedieinfo (&di, objfile); | |
1876 | if (di.at_sibling != 0) | |
1877 | { | |
1878 | nextdie = dbbase + di.at_sibling - dbroff; | |
1879 | } | |
1880 | else | |
1881 | { | |
1882 | nextdie = thisdie + di.die_length; | |
1883 | } | |
c906108c | 1884 | /* I think that these are always text, not data, addresses. */ |
181c1381 RE |
1885 | di.at_low_pc = SMASH_TEXT_ADDRESS (di.at_low_pc); |
1886 | di.at_high_pc = SMASH_TEXT_ADDRESS (di.at_high_pc); | |
c906108c SS |
1887 | switch (di.die_tag) |
1888 | { | |
1889 | case TAG_compile_unit: | |
1890 | /* Skip Tag_compile_unit if we are already inside a compilation | |
c5aa993b JM |
1891 | unit, we are unable to handle nested compilation units |
1892 | properly (FIXME). */ | |
c906108c SS |
1893 | if (current_subfile == NULL) |
1894 | read_file_scope (&di, thisdie, nextdie, objfile); | |
1895 | else | |
1896 | nextdie = thisdie + di.die_length; | |
1897 | break; | |
1898 | case TAG_global_subroutine: | |
1899 | case TAG_subroutine: | |
1900 | if (di.has_at_low_pc) | |
1901 | { | |
1902 | read_func_scope (&di, thisdie, nextdie, objfile); | |
1903 | } | |
1904 | break; | |
1905 | case TAG_lexical_block: | |
1906 | read_lexical_block_scope (&di, thisdie, nextdie, objfile); | |
1907 | break; | |
1908 | case TAG_class_type: | |
1909 | case TAG_structure_type: | |
1910 | case TAG_union_type: | |
1911 | read_structure_scope (&di, thisdie, nextdie, objfile); | |
1912 | break; | |
1913 | case TAG_enumeration_type: | |
1914 | read_enumeration (&di, thisdie, nextdie, objfile); | |
1915 | break; | |
1916 | case TAG_subroutine_type: | |
1917 | read_subroutine_type (&di, thisdie, nextdie); | |
1918 | break; | |
1919 | case TAG_array_type: | |
1920 | dwarf_read_array_type (&di); | |
1921 | break; | |
1922 | case TAG_pointer_type: | |
1923 | read_tag_pointer_type (&di); | |
1924 | break; | |
1925 | case TAG_string_type: | |
1926 | read_tag_string_type (&di); | |
1927 | break; | |
1928 | default: | |
1929 | new_symbol (&di, objfile); | |
1930 | break; | |
1931 | } | |
1932 | } | |
1933 | thisdie = nextdie; | |
1934 | } | |
1935 | } | |
1936 | ||
1937 | /* | |
1938 | ||
c5aa993b | 1939 | LOCAL FUNCTION |
c906108c | 1940 | |
c5aa993b | 1941 | decode_line_numbers -- decode a line number table fragment |
c906108c | 1942 | |
c5aa993b | 1943 | SYNOPSIS |
c906108c | 1944 | |
c5aa993b JM |
1945 | static void decode_line_numbers (char *tblscan, char *tblend, |
1946 | long length, long base, long line, long pc) | |
c906108c | 1947 | |
c5aa993b | 1948 | DESCRIPTION |
c906108c | 1949 | |
c5aa993b | 1950 | Translate the DWARF line number information to gdb form. |
c906108c | 1951 | |
c5aa993b JM |
1952 | The ".line" section contains one or more line number tables, one for |
1953 | each ".line" section from the objects that were linked. | |
c906108c | 1954 | |
c5aa993b JM |
1955 | The AT_stmt_list attribute for each TAG_source_file entry in the |
1956 | ".debug" section contains the offset into the ".line" section for the | |
1957 | start of the table for that file. | |
c906108c | 1958 | |
c5aa993b | 1959 | The table itself has the following structure: |
c906108c | 1960 | |
c5aa993b JM |
1961 | <table length><base address><source statement entry> |
1962 | 4 bytes 4 bytes 10 bytes | |
c906108c | 1963 | |
c5aa993b JM |
1964 | The table length is the total size of the table, including the 4 bytes |
1965 | for the length information. | |
c906108c | 1966 | |
c5aa993b JM |
1967 | The base address is the address of the first instruction generated |
1968 | for the source file. | |
c906108c | 1969 | |
c5aa993b | 1970 | Each source statement entry has the following structure: |
c906108c | 1971 | |
c5aa993b JM |
1972 | <line number><statement position><address delta> |
1973 | 4 bytes 2 bytes 4 bytes | |
c906108c | 1974 | |
c5aa993b JM |
1975 | The line number is relative to the start of the file, starting with |
1976 | line 1. | |
c906108c | 1977 | |
c5aa993b JM |
1978 | The statement position either -1 (0xFFFF) or the number of characters |
1979 | from the beginning of the line to the beginning of the statement. | |
c906108c | 1980 | |
c5aa993b JM |
1981 | The address delta is the difference between the base address and |
1982 | the address of the first instruction for the statement. | |
c906108c | 1983 | |
c5aa993b JM |
1984 | Note that we must copy the bytes from the packed table to our local |
1985 | variables before attempting to use them, to avoid alignment problems | |
1986 | on some machines, particularly RISC processors. | |
c906108c | 1987 | |
c5aa993b | 1988 | BUGS |
c906108c | 1989 | |
c5aa993b JM |
1990 | Does gdb expect the line numbers to be sorted? They are now by |
1991 | chance/luck, but are not required to be. (FIXME) | |
c906108c | 1992 | |
c5aa993b JM |
1993 | The line with number 0 is unused, gdb apparently can discover the |
1994 | span of the last line some other way. How? (FIXME) | |
c906108c SS |
1995 | */ |
1996 | ||
1997 | static void | |
fba45db2 | 1998 | decode_line_numbers (char *linetable) |
c906108c SS |
1999 | { |
2000 | char *tblscan; | |
2001 | char *tblend; | |
2002 | unsigned long length; | |
2003 | unsigned long base; | |
2004 | unsigned long line; | |
2005 | unsigned long pc; | |
c5aa993b | 2006 | |
c906108c SS |
2007 | if (linetable != NULL) |
2008 | { | |
2009 | tblscan = tblend = linetable; | |
2010 | length = target_to_host (tblscan, SIZEOF_LINETBL_LENGTH, GET_UNSIGNED, | |
2011 | current_objfile); | |
2012 | tblscan += SIZEOF_LINETBL_LENGTH; | |
2013 | tblend += length; | |
2014 | base = target_to_host (tblscan, TARGET_FT_POINTER_SIZE (objfile), | |
2015 | GET_UNSIGNED, current_objfile); | |
2016 | tblscan += TARGET_FT_POINTER_SIZE (objfile); | |
2017 | base += baseaddr; | |
2018 | while (tblscan < tblend) | |
2019 | { | |
2020 | line = target_to_host (tblscan, SIZEOF_LINETBL_LINENO, GET_UNSIGNED, | |
2021 | current_objfile); | |
2022 | tblscan += SIZEOF_LINETBL_LINENO + SIZEOF_LINETBL_STMT; | |
2023 | pc = target_to_host (tblscan, SIZEOF_LINETBL_DELTA, GET_UNSIGNED, | |
2024 | current_objfile); | |
2025 | tblscan += SIZEOF_LINETBL_DELTA; | |
2026 | pc += base; | |
2027 | if (line != 0) | |
2028 | { | |
2029 | record_line (current_subfile, line, pc); | |
2030 | } | |
2031 | } | |
2032 | } | |
2033 | } | |
2034 | ||
2035 | /* | |
2036 | ||
c5aa993b | 2037 | LOCAL FUNCTION |
c906108c | 2038 | |
c5aa993b | 2039 | locval -- compute the value of a location attribute |
c906108c | 2040 | |
c5aa993b | 2041 | SYNOPSIS |
c906108c | 2042 | |
c5aa993b | 2043 | static int locval (struct dieinfo *dip) |
c906108c | 2044 | |
c5aa993b | 2045 | DESCRIPTION |
c906108c | 2046 | |
c5aa993b JM |
2047 | Given pointer to a string of bytes that define a location, compute |
2048 | the location and return the value. | |
2049 | A location description containing no atoms indicates that the | |
2050 | object is optimized out. The optimized_out flag is set for those, | |
2051 | the return value is meaningless. | |
c906108c | 2052 | |
c5aa993b JM |
2053 | When computing values involving the current value of the frame pointer, |
2054 | the value zero is used, which results in a value relative to the frame | |
2055 | pointer, rather than the absolute value. This is what GDB wants | |
2056 | anyway. | |
c906108c | 2057 | |
c5aa993b JM |
2058 | When the result is a register number, the isreg flag is set, otherwise |
2059 | it is cleared. This is a kludge until we figure out a better | |
2060 | way to handle the problem. Gdb's design does not mesh well with the | |
2061 | DWARF notion of a location computing interpreter, which is a shame | |
2062 | because the flexibility goes unused. | |
2063 | ||
2064 | NOTES | |
2065 | ||
2066 | Note that stack[0] is unused except as a default error return. | |
2067 | Note that stack overflow is not yet handled. | |
c906108c SS |
2068 | */ |
2069 | ||
2070 | static int | |
fba45db2 | 2071 | locval (struct dieinfo *dip) |
c906108c SS |
2072 | { |
2073 | unsigned short nbytes; | |
2074 | unsigned short locsize; | |
2075 | auto long stack[64]; | |
2076 | int stacki; | |
2077 | char *loc; | |
2078 | char *end; | |
2079 | int loc_atom_code; | |
2080 | int loc_value_size; | |
c5aa993b JM |
2081 | |
2082 | loc = dip->at_location; | |
c906108c SS |
2083 | nbytes = attribute_size (AT_location); |
2084 | locsize = target_to_host (loc, nbytes, GET_UNSIGNED, current_objfile); | |
2085 | loc += nbytes; | |
2086 | end = loc + locsize; | |
2087 | stacki = 0; | |
2088 | stack[stacki] = 0; | |
c5aa993b JM |
2089 | dip->isreg = 0; |
2090 | dip->offreg = 0; | |
2091 | dip->optimized_out = 1; | |
c906108c SS |
2092 | loc_value_size = TARGET_FT_LONG_SIZE (current_objfile); |
2093 | while (loc < end) | |
2094 | { | |
c5aa993b | 2095 | dip->optimized_out = 0; |
c906108c SS |
2096 | loc_atom_code = target_to_host (loc, SIZEOF_LOC_ATOM_CODE, GET_UNSIGNED, |
2097 | current_objfile); | |
2098 | loc += SIZEOF_LOC_ATOM_CODE; | |
2099 | switch (loc_atom_code) | |
2100 | { | |
c5aa993b JM |
2101 | case 0: |
2102 | /* error */ | |
2103 | loc = end; | |
2104 | break; | |
2105 | case OP_REG: | |
2106 | /* push register (number) */ | |
2107 | stack[++stacki] | |
2108 | = DWARF_REG_TO_REGNUM (target_to_host (loc, loc_value_size, | |
2109 | GET_UNSIGNED, | |
2110 | current_objfile)); | |
2111 | loc += loc_value_size; | |
2112 | dip->isreg = 1; | |
2113 | break; | |
2114 | case OP_BASEREG: | |
2115 | /* push value of register (number) */ | |
2116 | /* Actually, we compute the value as if register has 0, so the | |
2117 | value ends up being the offset from that register. */ | |
2118 | dip->offreg = 1; | |
2119 | dip->basereg = target_to_host (loc, loc_value_size, GET_UNSIGNED, | |
2120 | current_objfile); | |
2121 | loc += loc_value_size; | |
2122 | stack[++stacki] = 0; | |
2123 | break; | |
2124 | case OP_ADDR: | |
2125 | /* push address (relocated address) */ | |
2126 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2127 | GET_UNSIGNED, current_objfile); | |
2128 | loc += loc_value_size; | |
2129 | break; | |
2130 | case OP_CONST: | |
2131 | /* push constant (number) FIXME: signed or unsigned! */ | |
2132 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2133 | GET_SIGNED, current_objfile); | |
2134 | loc += loc_value_size; | |
2135 | break; | |
2136 | case OP_DEREF2: | |
2137 | /* pop, deref and push 2 bytes (as a long) */ | |
23136709 KB |
2138 | complaint (&symfile_complaints, |
2139 | "DIE @ 0x%x \"%s\", OP_DEREF2 address 0x%lx not handled", | |
2140 | DIE_ID, DIE_NAME, stack[stacki]); | |
c5aa993b JM |
2141 | break; |
2142 | case OP_DEREF4: /* pop, deref and push 4 bytes (as a long) */ | |
23136709 KB |
2143 | complaint (&symfile_complaints, |
2144 | "DIE @ 0x%x \"%s\", OP_DEREF4 address 0x%lx not handled", | |
2145 | DIE_ID, DIE_NAME, stack[stacki]); | |
c5aa993b JM |
2146 | break; |
2147 | case OP_ADD: /* pop top 2 items, add, push result */ | |
2148 | stack[stacki - 1] += stack[stacki]; | |
2149 | stacki--; | |
2150 | break; | |
c906108c SS |
2151 | } |
2152 | } | |
2153 | return (stack[stacki]); | |
2154 | } | |
2155 | ||
2156 | /* | |
2157 | ||
c5aa993b | 2158 | LOCAL FUNCTION |
c906108c | 2159 | |
c5aa993b | 2160 | read_ofile_symtab -- build a full symtab entry from chunk of DIE's |
c906108c | 2161 | |
c5aa993b | 2162 | SYNOPSIS |
c906108c | 2163 | |
c5aa993b | 2164 | static void read_ofile_symtab (struct partial_symtab *pst) |
c906108c | 2165 | |
c5aa993b | 2166 | DESCRIPTION |
c906108c | 2167 | |
c5aa993b JM |
2168 | When expanding a partial symbol table entry to a full symbol table |
2169 | entry, this is the function that gets called to read in the symbols | |
2170 | for the compilation unit. A pointer to the newly constructed symtab, | |
2171 | which is now the new first one on the objfile's symtab list, is | |
2172 | stashed in the partial symbol table entry. | |
c906108c SS |
2173 | */ |
2174 | ||
2175 | static void | |
fba45db2 | 2176 | read_ofile_symtab (struct partial_symtab *pst) |
c906108c SS |
2177 | { |
2178 | struct cleanup *back_to; | |
2179 | unsigned long lnsize; | |
2180 | file_ptr foffset; | |
2181 | bfd *abfd; | |
2182 | char lnsizedata[SIZEOF_LINETBL_LENGTH]; | |
2183 | ||
c5aa993b JM |
2184 | abfd = pst->objfile->obfd; |
2185 | current_objfile = pst->objfile; | |
c906108c SS |
2186 | |
2187 | /* Allocate a buffer for the entire chunk of DIE's for this compilation | |
2188 | unit, seek to the location in the file, and read in all the DIE's. */ | |
2189 | ||
2190 | diecount = 0; | |
2191 | dbsize = DBLENGTH (pst); | |
2192 | dbbase = xmalloc (dbsize); | |
c5aa993b JM |
2193 | dbroff = DBROFF (pst); |
2194 | foffset = DBFOFF (pst) + dbroff; | |
c906108c SS |
2195 | base_section_offsets = pst->section_offsets; |
2196 | baseaddr = ANOFFSET (pst->section_offsets, 0); | |
2197 | if (bfd_seek (abfd, foffset, SEEK_SET) || | |
3a42e9d0 | 2198 | (bfd_bread (dbbase, dbsize, abfd) != dbsize)) |
c906108c | 2199 | { |
b8c9b27d | 2200 | xfree (dbbase); |
c906108c SS |
2201 | error ("can't read DWARF data"); |
2202 | } | |
b8c9b27d | 2203 | back_to = make_cleanup (xfree, dbbase); |
c906108c SS |
2204 | |
2205 | /* If there is a line number table associated with this compilation unit | |
2206 | then read the size of this fragment in bytes, from the fragment itself. | |
2207 | Allocate a buffer for the fragment and read it in for future | |
2208 | processing. */ | |
2209 | ||
2210 | lnbase = NULL; | |
2211 | if (LNFOFF (pst)) | |
2212 | { | |
2213 | if (bfd_seek (abfd, LNFOFF (pst), SEEK_SET) || | |
3a42e9d0 AM |
2214 | (bfd_bread ((PTR) lnsizedata, sizeof (lnsizedata), abfd) |
2215 | != sizeof (lnsizedata))) | |
c906108c SS |
2216 | { |
2217 | error ("can't read DWARF line number table size"); | |
2218 | } | |
2219 | lnsize = target_to_host (lnsizedata, SIZEOF_LINETBL_LENGTH, | |
c5aa993b | 2220 | GET_UNSIGNED, pst->objfile); |
c906108c SS |
2221 | lnbase = xmalloc (lnsize); |
2222 | if (bfd_seek (abfd, LNFOFF (pst), SEEK_SET) || | |
3a42e9d0 | 2223 | (bfd_bread (lnbase, lnsize, abfd) != lnsize)) |
c906108c | 2224 | { |
b8c9b27d | 2225 | xfree (lnbase); |
c906108c SS |
2226 | error ("can't read DWARF line numbers"); |
2227 | } | |
b8c9b27d | 2228 | make_cleanup (xfree, lnbase); |
c906108c SS |
2229 | } |
2230 | ||
c5aa993b | 2231 | process_dies (dbbase, dbbase + dbsize, pst->objfile); |
c906108c SS |
2232 | do_cleanups (back_to); |
2233 | current_objfile = NULL; | |
c5aa993b | 2234 | pst->symtab = pst->objfile->symtabs; |
c906108c SS |
2235 | } |
2236 | ||
2237 | /* | |
2238 | ||
c5aa993b | 2239 | LOCAL FUNCTION |
c906108c | 2240 | |
c5aa993b | 2241 | psymtab_to_symtab_1 -- do grunt work for building a full symtab entry |
c906108c | 2242 | |
c5aa993b | 2243 | SYNOPSIS |
c906108c | 2244 | |
c5aa993b | 2245 | static void psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 2246 | |
c5aa993b | 2247 | DESCRIPTION |
c906108c | 2248 | |
c5aa993b JM |
2249 | Called once for each partial symbol table entry that needs to be |
2250 | expanded into a full symbol table entry. | |
c906108c | 2251 | |
c5aa993b | 2252 | */ |
c906108c SS |
2253 | |
2254 | static void | |
fba45db2 | 2255 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c SS |
2256 | { |
2257 | int i; | |
2258 | struct cleanup *old_chain; | |
c5aa993b | 2259 | |
c906108c SS |
2260 | if (pst != NULL) |
2261 | { | |
2262 | if (pst->readin) | |
2263 | { | |
2264 | warning ("psymtab for %s already read in. Shouldn't happen.", | |
c5aa993b | 2265 | pst->filename); |
c906108c SS |
2266 | } |
2267 | else | |
2268 | { | |
2269 | /* Read in all partial symtabs on which this one is dependent */ | |
c5aa993b | 2270 | for (i = 0; i < pst->number_of_dependencies; i++) |
c906108c | 2271 | { |
c5aa993b | 2272 | if (!pst->dependencies[i]->readin) |
c906108c SS |
2273 | { |
2274 | /* Inform about additional files that need to be read in. */ | |
2275 | if (info_verbose) | |
2276 | { | |
2277 | fputs_filtered (" ", gdb_stdout); | |
2278 | wrap_here (""); | |
2279 | fputs_filtered ("and ", gdb_stdout); | |
2280 | wrap_here (""); | |
2281 | printf_filtered ("%s...", | |
c5aa993b | 2282 | pst->dependencies[i]->filename); |
c906108c | 2283 | wrap_here (""); |
c5aa993b | 2284 | gdb_flush (gdb_stdout); /* Flush output */ |
c906108c | 2285 | } |
c5aa993b | 2286 | psymtab_to_symtab_1 (pst->dependencies[i]); |
c906108c | 2287 | } |
c5aa993b JM |
2288 | } |
2289 | if (DBLENGTH (pst)) /* Otherwise it's a dummy */ | |
c906108c SS |
2290 | { |
2291 | buildsym_init (); | |
a0b3c4fd | 2292 | old_chain = make_cleanup (really_free_pendings, 0); |
c906108c SS |
2293 | read_ofile_symtab (pst); |
2294 | if (info_verbose) | |
2295 | { | |
2296 | printf_filtered ("%d DIE's, sorting...", diecount); | |
2297 | wrap_here (""); | |
2298 | gdb_flush (gdb_stdout); | |
2299 | } | |
c5aa993b | 2300 | sort_symtab_syms (pst->symtab); |
c906108c SS |
2301 | do_cleanups (old_chain); |
2302 | } | |
c5aa993b | 2303 | pst->readin = 1; |
c906108c SS |
2304 | } |
2305 | } | |
2306 | } | |
2307 | ||
2308 | /* | |
2309 | ||
c5aa993b | 2310 | LOCAL FUNCTION |
c906108c | 2311 | |
c5aa993b | 2312 | dwarf_psymtab_to_symtab -- build a full symtab entry from partial one |
c906108c | 2313 | |
c5aa993b | 2314 | SYNOPSIS |
c906108c | 2315 | |
c5aa993b | 2316 | static void dwarf_psymtab_to_symtab (struct partial_symtab *pst) |
c906108c | 2317 | |
c5aa993b | 2318 | DESCRIPTION |
c906108c | 2319 | |
c5aa993b JM |
2320 | This is the DWARF support entry point for building a full symbol |
2321 | table entry from a partial symbol table entry. We are passed a | |
2322 | pointer to the partial symbol table entry that needs to be expanded. | |
c906108c | 2323 | |
c5aa993b | 2324 | */ |
c906108c SS |
2325 | |
2326 | static void | |
fba45db2 | 2327 | dwarf_psymtab_to_symtab (struct partial_symtab *pst) |
c906108c SS |
2328 | { |
2329 | ||
2330 | if (pst != NULL) | |
2331 | { | |
c5aa993b | 2332 | if (pst->readin) |
c906108c SS |
2333 | { |
2334 | warning ("psymtab for %s already read in. Shouldn't happen.", | |
c5aa993b | 2335 | pst->filename); |
c906108c SS |
2336 | } |
2337 | else | |
2338 | { | |
c5aa993b | 2339 | if (DBLENGTH (pst) || pst->number_of_dependencies) |
c906108c SS |
2340 | { |
2341 | /* Print the message now, before starting serious work, to avoid | |
c5aa993b | 2342 | disconcerting pauses. */ |
c906108c SS |
2343 | if (info_verbose) |
2344 | { | |
2345 | printf_filtered ("Reading in symbols for %s...", | |
c5aa993b | 2346 | pst->filename); |
c906108c SS |
2347 | gdb_flush (gdb_stdout); |
2348 | } | |
c5aa993b | 2349 | |
c906108c | 2350 | psymtab_to_symtab_1 (pst); |
c5aa993b JM |
2351 | |
2352 | #if 0 /* FIXME: Check to see what dbxread is doing here and see if | |
2353 | we need to do an equivalent or is this something peculiar to | |
2354 | stabs/a.out format. | |
2355 | Match with global symbols. This only needs to be done once, | |
2356 | after all of the symtabs and dependencies have been read in. | |
2357 | */ | |
2358 | scan_file_globals (pst->objfile); | |
c906108c | 2359 | #endif |
c5aa993b | 2360 | |
c906108c SS |
2361 | /* Finish up the verbose info message. */ |
2362 | if (info_verbose) | |
2363 | { | |
2364 | printf_filtered ("done.\n"); | |
2365 | gdb_flush (gdb_stdout); | |
2366 | } | |
2367 | } | |
2368 | } | |
2369 | } | |
2370 | } | |
2371 | ||
2372 | /* | |
2373 | ||
c5aa993b | 2374 | LOCAL FUNCTION |
c906108c | 2375 | |
c5aa993b | 2376 | add_enum_psymbol -- add enumeration members to partial symbol table |
c906108c | 2377 | |
c5aa993b | 2378 | DESCRIPTION |
c906108c | 2379 | |
c5aa993b JM |
2380 | Given pointer to a DIE that is known to be for an enumeration, |
2381 | extract the symbolic names of the enumeration members and add | |
2382 | partial symbols for them. | |
2383 | */ | |
c906108c SS |
2384 | |
2385 | static void | |
fba45db2 | 2386 | add_enum_psymbol (struct dieinfo *dip, struct objfile *objfile) |
c906108c SS |
2387 | { |
2388 | char *scan; | |
2389 | char *listend; | |
2390 | unsigned short blocksz; | |
2391 | int nbytes; | |
c5aa993b JM |
2392 | |
2393 | if ((scan = dip->at_element_list) != NULL) | |
c906108c | 2394 | { |
c5aa993b | 2395 | if (dip->short_element_list) |
c906108c SS |
2396 | { |
2397 | nbytes = attribute_size (AT_short_element_list); | |
2398 | } | |
2399 | else | |
2400 | { | |
2401 | nbytes = attribute_size (AT_element_list); | |
2402 | } | |
2403 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); | |
2404 | scan += nbytes; | |
2405 | listend = scan + blocksz; | |
2406 | while (scan < listend) | |
2407 | { | |
2408 | scan += TARGET_FT_LONG_SIZE (objfile); | |
2409 | add_psymbol_to_list (scan, strlen (scan), VAR_NAMESPACE, LOC_CONST, | |
c5aa993b | 2410 | &objfile->static_psymbols, 0, 0, cu_language, |
c906108c SS |
2411 | objfile); |
2412 | scan += strlen (scan) + 1; | |
2413 | } | |
2414 | } | |
2415 | } | |
2416 | ||
2417 | /* | |
2418 | ||
c5aa993b | 2419 | LOCAL FUNCTION |
c906108c | 2420 | |
c5aa993b | 2421 | add_partial_symbol -- add symbol to partial symbol table |
c906108c | 2422 | |
c5aa993b | 2423 | DESCRIPTION |
c906108c | 2424 | |
c5aa993b JM |
2425 | Given a DIE, if it is one of the types that we want to |
2426 | add to a partial symbol table, finish filling in the die info | |
2427 | and then add a partial symbol table entry for it. | |
c906108c | 2428 | |
c5aa993b | 2429 | NOTES |
c906108c | 2430 | |
c5aa993b JM |
2431 | The caller must ensure that the DIE has a valid name attribute. |
2432 | */ | |
c906108c SS |
2433 | |
2434 | static void | |
fba45db2 | 2435 | add_partial_symbol (struct dieinfo *dip, struct objfile *objfile) |
c906108c | 2436 | { |
c5aa993b | 2437 | switch (dip->die_tag) |
c906108c SS |
2438 | { |
2439 | case TAG_global_subroutine: | |
c5aa993b JM |
2440 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
2441 | VAR_NAMESPACE, LOC_BLOCK, | |
2442 | &objfile->global_psymbols, | |
2443 | 0, dip->at_low_pc, cu_language, objfile); | |
c906108c SS |
2444 | break; |
2445 | case TAG_global_variable: | |
c5aa993b | 2446 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
c906108c | 2447 | VAR_NAMESPACE, LOC_STATIC, |
c5aa993b | 2448 | &objfile->global_psymbols, |
c906108c SS |
2449 | 0, 0, cu_language, objfile); |
2450 | break; | |
2451 | case TAG_subroutine: | |
c5aa993b JM |
2452 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
2453 | VAR_NAMESPACE, LOC_BLOCK, | |
2454 | &objfile->static_psymbols, | |
2455 | 0, dip->at_low_pc, cu_language, objfile); | |
c906108c SS |
2456 | break; |
2457 | case TAG_local_variable: | |
c5aa993b | 2458 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
c906108c | 2459 | VAR_NAMESPACE, LOC_STATIC, |
c5aa993b | 2460 | &objfile->static_psymbols, |
c906108c SS |
2461 | 0, 0, cu_language, objfile); |
2462 | break; | |
2463 | case TAG_typedef: | |
c5aa993b | 2464 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
c906108c | 2465 | VAR_NAMESPACE, LOC_TYPEDEF, |
c5aa993b | 2466 | &objfile->static_psymbols, |
c906108c SS |
2467 | 0, 0, cu_language, objfile); |
2468 | break; | |
2469 | case TAG_class_type: | |
2470 | case TAG_structure_type: | |
2471 | case TAG_union_type: | |
2472 | case TAG_enumeration_type: | |
2473 | /* Do not add opaque aggregate definitions to the psymtab. */ | |
c5aa993b | 2474 | if (!dip->has_at_byte_size) |
c906108c | 2475 | break; |
c5aa993b | 2476 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
c906108c | 2477 | STRUCT_NAMESPACE, LOC_TYPEDEF, |
c5aa993b | 2478 | &objfile->static_psymbols, |
c906108c SS |
2479 | 0, 0, cu_language, objfile); |
2480 | if (cu_language == language_cplus) | |
2481 | { | |
2482 | /* For C++, these implicitly act as typedefs as well. */ | |
c5aa993b | 2483 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
c906108c | 2484 | VAR_NAMESPACE, LOC_TYPEDEF, |
c5aa993b | 2485 | &objfile->static_psymbols, |
c906108c SS |
2486 | 0, 0, cu_language, objfile); |
2487 | } | |
2488 | break; | |
2489 | } | |
2490 | } | |
9846de1b | 2491 | /* *INDENT-OFF* */ |
c906108c SS |
2492 | /* |
2493 | ||
2494 | LOCAL FUNCTION | |
2495 | ||
2496 | scan_partial_symbols -- scan DIE's within a single compilation unit | |
2497 | ||
2498 | DESCRIPTION | |
2499 | ||
2500 | Process the DIE's within a single compilation unit, looking for | |
2501 | interesting DIE's that contribute to the partial symbol table entry | |
2502 | for this compilation unit. | |
2503 | ||
2504 | NOTES | |
2505 | ||
2506 | There are some DIE's that may appear both at file scope and within | |
2507 | the scope of a function. We are only interested in the ones at file | |
2508 | scope, and the only way to tell them apart is to keep track of the | |
2509 | scope. For example, consider the test case: | |
2510 | ||
2511 | static int i; | |
2512 | main () { int j; } | |
2513 | ||
2514 | for which the relevant DWARF segment has the structure: | |
2515 | ||
2516 | 0x51: | |
2517 | 0x23 global subrtn sibling 0x9b | |
2518 | name main | |
2519 | fund_type FT_integer | |
2520 | low_pc 0x800004cc | |
2521 | high_pc 0x800004d4 | |
2522 | ||
2523 | 0x74: | |
2524 | 0x23 local var sibling 0x97 | |
2525 | name j | |
2526 | fund_type FT_integer | |
2527 | location OP_BASEREG 0xe | |
2528 | OP_CONST 0xfffffffc | |
2529 | OP_ADD | |
2530 | 0x97: | |
2531 | 0x4 | |
2532 | ||
2533 | 0x9b: | |
2534 | 0x1d local var sibling 0xb8 | |
2535 | name i | |
2536 | fund_type FT_integer | |
2537 | location OP_ADDR 0x800025dc | |
2538 | ||
2539 | 0xb8: | |
2540 | 0x4 | |
2541 | ||
2542 | We want to include the symbol 'i' in the partial symbol table, but | |
2543 | not the symbol 'j'. In essence, we want to skip all the dies within | |
2544 | the scope of a TAG_global_subroutine DIE. | |
2545 | ||
2546 | Don't attempt to add anonymous structures or unions since they have | |
2547 | no name. Anonymous enumerations however are processed, because we | |
2548 | want to extract their member names (the check for a tag name is | |
2549 | done later). | |
2550 | ||
2551 | Also, for variables and subroutines, check that this is the place | |
2552 | where the actual definition occurs, rather than just a reference | |
2553 | to an external. | |
2554 | */ | |
9846de1b | 2555 | /* *INDENT-ON* */ |
c906108c | 2556 | |
c5aa993b JM |
2557 | |
2558 | ||
c906108c | 2559 | static void |
fba45db2 | 2560 | scan_partial_symbols (char *thisdie, char *enddie, struct objfile *objfile) |
c906108c SS |
2561 | { |
2562 | char *nextdie; | |
2563 | char *temp; | |
2564 | struct dieinfo di; | |
c5aa993b | 2565 | |
c906108c SS |
2566 | while (thisdie < enddie) |
2567 | { | |
2568 | basicdieinfo (&di, thisdie, objfile); | |
2569 | if (di.die_length < SIZEOF_DIE_LENGTH) | |
2570 | { | |
2571 | break; | |
2572 | } | |
2573 | else | |
2574 | { | |
2575 | nextdie = thisdie + di.die_length; | |
2576 | /* To avoid getting complete die information for every die, we | |
2577 | only do it (below) for the cases we are interested in. */ | |
2578 | switch (di.die_tag) | |
2579 | { | |
2580 | case TAG_global_subroutine: | |
2581 | case TAG_subroutine: | |
2582 | completedieinfo (&di, objfile); | |
2583 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2584 | { | |
2585 | add_partial_symbol (&di, objfile); | |
2586 | /* If there is a sibling attribute, adjust the nextdie | |
2587 | pointer to skip the entire scope of the subroutine. | |
2588 | Apply some sanity checking to make sure we don't | |
2589 | overrun or underrun the range of remaining DIE's */ | |
2590 | if (di.at_sibling != 0) | |
2591 | { | |
2592 | temp = dbbase + di.at_sibling - dbroff; | |
2593 | if ((temp < thisdie) || (temp >= enddie)) | |
2594 | { | |
23136709 KB |
2595 | bad_die_ref_complaint (DIE_ID, DIE_NAME, |
2596 | di.at_sibling); | |
c906108c SS |
2597 | } |
2598 | else | |
2599 | { | |
2600 | nextdie = temp; | |
2601 | } | |
2602 | } | |
2603 | } | |
2604 | break; | |
2605 | case TAG_global_variable: | |
2606 | case TAG_local_variable: | |
2607 | completedieinfo (&di, objfile); | |
2608 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2609 | { | |
2610 | add_partial_symbol (&di, objfile); | |
2611 | } | |
2612 | break; | |
2613 | case TAG_typedef: | |
2614 | case TAG_class_type: | |
2615 | case TAG_structure_type: | |
2616 | case TAG_union_type: | |
2617 | completedieinfo (&di, objfile); | |
2618 | if (di.at_name) | |
2619 | { | |
2620 | add_partial_symbol (&di, objfile); | |
2621 | } | |
2622 | break; | |
2623 | case TAG_enumeration_type: | |
2624 | completedieinfo (&di, objfile); | |
2625 | if (di.at_name) | |
2626 | { | |
2627 | add_partial_symbol (&di, objfile); | |
2628 | } | |
2629 | add_enum_psymbol (&di, objfile); | |
2630 | break; | |
2631 | } | |
2632 | } | |
2633 | thisdie = nextdie; | |
2634 | } | |
2635 | } | |
2636 | ||
2637 | /* | |
2638 | ||
c5aa993b | 2639 | LOCAL FUNCTION |
c906108c | 2640 | |
c5aa993b | 2641 | scan_compilation_units -- build a psymtab entry for each compilation |
c906108c | 2642 | |
c5aa993b | 2643 | DESCRIPTION |
c906108c | 2644 | |
c5aa993b JM |
2645 | This is the top level dwarf parsing routine for building partial |
2646 | symbol tables. | |
c906108c | 2647 | |
c5aa993b JM |
2648 | It scans from the beginning of the DWARF table looking for the first |
2649 | TAG_compile_unit DIE, and then follows the sibling chain to locate | |
2650 | each additional TAG_compile_unit DIE. | |
2651 | ||
2652 | For each TAG_compile_unit DIE it creates a partial symtab structure, | |
2653 | calls a subordinate routine to collect all the compilation unit's | |
2654 | global DIE's, file scope DIEs, typedef DIEs, etc, and then links the | |
2655 | new partial symtab structure into the partial symbol table. It also | |
2656 | records the appropriate information in the partial symbol table entry | |
2657 | to allow the chunk of DIE's and line number table for this compilation | |
2658 | unit to be located and re-read later, to generate a complete symbol | |
2659 | table entry for the compilation unit. | |
2660 | ||
2661 | Thus it effectively partitions up a chunk of DIE's for multiple | |
2662 | compilation units into smaller DIE chunks and line number tables, | |
2663 | and associates them with a partial symbol table entry. | |
2664 | ||
2665 | NOTES | |
c906108c | 2666 | |
c5aa993b JM |
2667 | If any compilation unit has no line number table associated with |
2668 | it for some reason (a missing at_stmt_list attribute, rather than | |
2669 | just one with a value of zero, which is valid) then we ensure that | |
2670 | the recorded file offset is zero so that the routine which later | |
2671 | reads line number table fragments knows that there is no fragment | |
2672 | to read. | |
c906108c | 2673 | |
c5aa993b | 2674 | RETURNS |
c906108c | 2675 | |
c5aa993b | 2676 | Returns no value. |
c906108c SS |
2677 | |
2678 | */ | |
2679 | ||
2680 | static void | |
fba45db2 KB |
2681 | scan_compilation_units (char *thisdie, char *enddie, file_ptr dbfoff, |
2682 | file_ptr lnoffset, struct objfile *objfile) | |
c906108c SS |
2683 | { |
2684 | char *nextdie; | |
2685 | struct dieinfo di; | |
2686 | struct partial_symtab *pst; | |
2687 | int culength; | |
2688 | int curoff; | |
2689 | file_ptr curlnoffset; | |
2690 | ||
2691 | while (thisdie < enddie) | |
2692 | { | |
2693 | basicdieinfo (&di, thisdie, objfile); | |
2694 | if (di.die_length < SIZEOF_DIE_LENGTH) | |
2695 | { | |
2696 | break; | |
2697 | } | |
2698 | else if (di.die_tag != TAG_compile_unit) | |
2699 | { | |
2700 | nextdie = thisdie + di.die_length; | |
2701 | } | |
2702 | else | |
2703 | { | |
2704 | completedieinfo (&di, objfile); | |
2705 | set_cu_language (&di); | |
2706 | if (di.at_sibling != 0) | |
2707 | { | |
2708 | nextdie = dbbase + di.at_sibling - dbroff; | |
2709 | } | |
2710 | else | |
2711 | { | |
2712 | nextdie = thisdie + di.die_length; | |
2713 | } | |
2714 | curoff = thisdie - dbbase; | |
2715 | culength = nextdie - thisdie; | |
2716 | curlnoffset = di.has_at_stmt_list ? lnoffset + di.at_stmt_list : 0; | |
2717 | ||
2718 | /* First allocate a new partial symbol table structure */ | |
2719 | ||
2720 | pst = start_psymtab_common (objfile, base_section_offsets, | |
2721 | di.at_name, di.at_low_pc, | |
c5aa993b JM |
2722 | objfile->global_psymbols.next, |
2723 | objfile->static_psymbols.next); | |
c906108c | 2724 | |
c5aa993b JM |
2725 | pst->texthigh = di.at_high_pc; |
2726 | pst->read_symtab_private = (char *) | |
2727 | obstack_alloc (&objfile->psymbol_obstack, | |
2728 | sizeof (struct dwfinfo)); | |
c906108c SS |
2729 | DBFOFF (pst) = dbfoff; |
2730 | DBROFF (pst) = curoff; | |
2731 | DBLENGTH (pst) = culength; | |
c5aa993b JM |
2732 | LNFOFF (pst) = curlnoffset; |
2733 | pst->read_symtab = dwarf_psymtab_to_symtab; | |
c906108c SS |
2734 | |
2735 | /* Now look for partial symbols */ | |
2736 | ||
2737 | scan_partial_symbols (thisdie + di.die_length, nextdie, objfile); | |
2738 | ||
c5aa993b JM |
2739 | pst->n_global_syms = objfile->global_psymbols.next - |
2740 | (objfile->global_psymbols.list + pst->globals_offset); | |
2741 | pst->n_static_syms = objfile->static_psymbols.next - | |
2742 | (objfile->static_psymbols.list + pst->statics_offset); | |
c906108c SS |
2743 | sort_pst_symbols (pst); |
2744 | /* If there is already a psymtab or symtab for a file of this name, | |
2745 | remove it. (If there is a symtab, more drastic things also | |
2746 | happen.) This happens in VxWorks. */ | |
c5aa993b | 2747 | free_named_symtabs (pst->filename); |
c906108c | 2748 | } |
c5aa993b | 2749 | thisdie = nextdie; |
c906108c SS |
2750 | } |
2751 | } | |
2752 | ||
2753 | /* | |
2754 | ||
c5aa993b | 2755 | LOCAL FUNCTION |
c906108c | 2756 | |
c5aa993b | 2757 | new_symbol -- make a symbol table entry for a new symbol |
c906108c | 2758 | |
c5aa993b | 2759 | SYNOPSIS |
c906108c | 2760 | |
c5aa993b JM |
2761 | static struct symbol *new_symbol (struct dieinfo *dip, |
2762 | struct objfile *objfile) | |
c906108c | 2763 | |
c5aa993b | 2764 | DESCRIPTION |
c906108c | 2765 | |
c5aa993b JM |
2766 | Given a pointer to a DWARF information entry, figure out if we need |
2767 | to make a symbol table entry for it, and if so, create a new entry | |
2768 | and return a pointer to it. | |
c906108c SS |
2769 | */ |
2770 | ||
2771 | static struct symbol * | |
fba45db2 | 2772 | new_symbol (struct dieinfo *dip, struct objfile *objfile) |
c906108c SS |
2773 | { |
2774 | struct symbol *sym = NULL; | |
c5aa993b JM |
2775 | |
2776 | if (dip->at_name != NULL) | |
c906108c | 2777 | { |
c5aa993b | 2778 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
c906108c SS |
2779 | sizeof (struct symbol)); |
2780 | OBJSTAT (objfile, n_syms++); | |
2781 | memset (sym, 0, sizeof (struct symbol)); | |
c5aa993b | 2782 | SYMBOL_NAME (sym) = create_name (dip->at_name, |
c906108c SS |
2783 | &objfile->symbol_obstack); |
2784 | /* default assumptions */ | |
2785 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2786 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2787 | SYMBOL_TYPE (sym) = decode_die_type (dip); | |
2788 | ||
2789 | /* If this symbol is from a C++ compilation, then attempt to cache the | |
c5aa993b JM |
2790 | demangled form for future reference. This is a typical time versus |
2791 | space tradeoff, that was decided in favor of time because it sped up | |
2792 | C++ symbol lookups by a factor of about 20. */ | |
c906108c SS |
2793 | |
2794 | SYMBOL_LANGUAGE (sym) = cu_language; | |
c5aa993b JM |
2795 | SYMBOL_INIT_DEMANGLED_NAME (sym, &objfile->symbol_obstack); |
2796 | switch (dip->die_tag) | |
c906108c SS |
2797 | { |
2798 | case TAG_label: | |
c5aa993b | 2799 | SYMBOL_VALUE_ADDRESS (sym) = dip->at_low_pc; |
c906108c SS |
2800 | SYMBOL_CLASS (sym) = LOC_LABEL; |
2801 | break; | |
2802 | case TAG_global_subroutine: | |
2803 | case TAG_subroutine: | |
c5aa993b | 2804 | SYMBOL_VALUE_ADDRESS (sym) = dip->at_low_pc; |
c906108c | 2805 | SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym)); |
c5aa993b | 2806 | if (dip->at_prototyped) |
c906108c SS |
2807 | TYPE_FLAGS (SYMBOL_TYPE (sym)) |= TYPE_FLAG_PROTOTYPED; |
2808 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
c5aa993b | 2809 | if (dip->die_tag == TAG_global_subroutine) |
c906108c SS |
2810 | { |
2811 | add_symbol_to_list (sym, &global_symbols); | |
2812 | } | |
2813 | else | |
2814 | { | |
2815 | add_symbol_to_list (sym, list_in_scope); | |
2816 | } | |
2817 | break; | |
2818 | case TAG_global_variable: | |
c5aa993b | 2819 | if (dip->at_location != NULL) |
c906108c SS |
2820 | { |
2821 | SYMBOL_VALUE_ADDRESS (sym) = locval (dip); | |
2822 | add_symbol_to_list (sym, &global_symbols); | |
2823 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2824 | SYMBOL_VALUE (sym) += baseaddr; | |
2825 | } | |
2826 | break; | |
2827 | case TAG_local_variable: | |
c5aa993b | 2828 | if (dip->at_location != NULL) |
c906108c SS |
2829 | { |
2830 | int loc = locval (dip); | |
c5aa993b | 2831 | if (dip->optimized_out) |
c906108c SS |
2832 | { |
2833 | SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; | |
2834 | } | |
c5aa993b | 2835 | else if (dip->isreg) |
c906108c SS |
2836 | { |
2837 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
2838 | } | |
c5aa993b | 2839 | else if (dip->offreg) |
c906108c SS |
2840 | { |
2841 | SYMBOL_CLASS (sym) = LOC_BASEREG; | |
c5aa993b | 2842 | SYMBOL_BASEREG (sym) = dip->basereg; |
c906108c SS |
2843 | } |
2844 | else | |
2845 | { | |
2846 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2847 | SYMBOL_VALUE (sym) += baseaddr; | |
2848 | } | |
2849 | if (SYMBOL_CLASS (sym) == LOC_STATIC) | |
2850 | { | |
2851 | /* LOC_STATIC address class MUST use SYMBOL_VALUE_ADDRESS, | |
2852 | which may store to a bigger location than SYMBOL_VALUE. */ | |
2853 | SYMBOL_VALUE_ADDRESS (sym) = loc; | |
2854 | } | |
2855 | else | |
2856 | { | |
2857 | SYMBOL_VALUE (sym) = loc; | |
2858 | } | |
2859 | add_symbol_to_list (sym, list_in_scope); | |
2860 | } | |
2861 | break; | |
2862 | case TAG_formal_parameter: | |
c5aa993b | 2863 | if (dip->at_location != NULL) |
c906108c SS |
2864 | { |
2865 | SYMBOL_VALUE (sym) = locval (dip); | |
2866 | } | |
2867 | add_symbol_to_list (sym, list_in_scope); | |
c5aa993b | 2868 | if (dip->isreg) |
c906108c SS |
2869 | { |
2870 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
2871 | } | |
c5aa993b | 2872 | else if (dip->offreg) |
c906108c SS |
2873 | { |
2874 | SYMBOL_CLASS (sym) = LOC_BASEREG_ARG; | |
c5aa993b | 2875 | SYMBOL_BASEREG (sym) = dip->basereg; |
c906108c SS |
2876 | } |
2877 | else | |
2878 | { | |
2879 | SYMBOL_CLASS (sym) = LOC_ARG; | |
2880 | } | |
2881 | break; | |
2882 | case TAG_unspecified_parameters: | |
2883 | /* From varargs functions; gdb doesn't seem to have any interest in | |
2884 | this information, so just ignore it for now. (FIXME?) */ | |
2885 | break; | |
2886 | case TAG_class_type: | |
2887 | case TAG_structure_type: | |
2888 | case TAG_union_type: | |
2889 | case TAG_enumeration_type: | |
2890 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
2891 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
2892 | add_symbol_to_list (sym, list_in_scope); | |
2893 | break; | |
2894 | case TAG_typedef: | |
2895 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
2896 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2897 | add_symbol_to_list (sym, list_in_scope); | |
2898 | break; | |
2899 | default: | |
2900 | /* Not a tag we recognize. Hopefully we aren't processing trash | |
2901 | data, but since we must specifically ignore things we don't | |
2902 | recognize, there is nothing else we should do at this point. */ | |
2903 | break; | |
2904 | } | |
2905 | } | |
2906 | return (sym); | |
2907 | } | |
2908 | ||
2909 | /* | |
2910 | ||
c5aa993b | 2911 | LOCAL FUNCTION |
c906108c | 2912 | |
c5aa993b | 2913 | synthesize_typedef -- make a symbol table entry for a "fake" typedef |
c906108c | 2914 | |
c5aa993b | 2915 | SYNOPSIS |
c906108c | 2916 | |
c5aa993b JM |
2917 | static void synthesize_typedef (struct dieinfo *dip, |
2918 | struct objfile *objfile, | |
2919 | struct type *type); | |
c906108c | 2920 | |
c5aa993b | 2921 | DESCRIPTION |
c906108c | 2922 | |
c5aa993b JM |
2923 | Given a pointer to a DWARF information entry, synthesize a typedef |
2924 | for the name in the DIE, using the specified type. | |
c906108c | 2925 | |
c5aa993b JM |
2926 | This is used for C++ class, structs, unions, and enumerations to |
2927 | set up the tag name as a type. | |
c906108c SS |
2928 | |
2929 | */ | |
2930 | ||
2931 | static void | |
fba45db2 KB |
2932 | synthesize_typedef (struct dieinfo *dip, struct objfile *objfile, |
2933 | struct type *type) | |
c906108c SS |
2934 | { |
2935 | struct symbol *sym = NULL; | |
c5aa993b JM |
2936 | |
2937 | if (dip->at_name != NULL) | |
c906108c SS |
2938 | { |
2939 | sym = (struct symbol *) | |
c5aa993b | 2940 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); |
c906108c SS |
2941 | OBJSTAT (objfile, n_syms++); |
2942 | memset (sym, 0, sizeof (struct symbol)); | |
c5aa993b | 2943 | SYMBOL_NAME (sym) = create_name (dip->at_name, |
c906108c SS |
2944 | &objfile->symbol_obstack); |
2945 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); | |
2946 | SYMBOL_TYPE (sym) = type; | |
2947 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
2948 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2949 | add_symbol_to_list (sym, list_in_scope); | |
2950 | } | |
2951 | } | |
2952 | ||
2953 | /* | |
2954 | ||
c5aa993b | 2955 | LOCAL FUNCTION |
c906108c | 2956 | |
c5aa993b | 2957 | decode_mod_fund_type -- decode a modified fundamental type |
c906108c | 2958 | |
c5aa993b | 2959 | SYNOPSIS |
c906108c | 2960 | |
c5aa993b | 2961 | static struct type *decode_mod_fund_type (char *typedata) |
c906108c | 2962 | |
c5aa993b | 2963 | DESCRIPTION |
c906108c | 2964 | |
c5aa993b JM |
2965 | Decode a block of data containing a modified fundamental |
2966 | type specification. TYPEDATA is a pointer to the block, | |
2967 | which starts with a length containing the size of the rest | |
2968 | of the block. At the end of the block is a fundmental type | |
2969 | code value that gives the fundamental type. Everything | |
2970 | in between are type modifiers. | |
c906108c | 2971 | |
c5aa993b JM |
2972 | We simply compute the number of modifiers and call the general |
2973 | function decode_modified_type to do the actual work. | |
2974 | */ | |
c906108c SS |
2975 | |
2976 | static struct type * | |
fba45db2 | 2977 | decode_mod_fund_type (char *typedata) |
c906108c SS |
2978 | { |
2979 | struct type *typep = NULL; | |
2980 | unsigned short modcount; | |
2981 | int nbytes; | |
c5aa993b | 2982 | |
c906108c SS |
2983 | /* Get the total size of the block, exclusive of the size itself */ |
2984 | ||
2985 | nbytes = attribute_size (AT_mod_fund_type); | |
2986 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
2987 | typedata += nbytes; | |
2988 | ||
2989 | /* Deduct the size of the fundamental type bytes at the end of the block. */ | |
2990 | ||
2991 | modcount -= attribute_size (AT_fund_type); | |
2992 | ||
2993 | /* Now do the actual decoding */ | |
2994 | ||
2995 | typep = decode_modified_type (typedata, modcount, AT_mod_fund_type); | |
2996 | return (typep); | |
2997 | } | |
2998 | ||
2999 | /* | |
3000 | ||
c5aa993b | 3001 | LOCAL FUNCTION |
c906108c | 3002 | |
c5aa993b | 3003 | decode_mod_u_d_type -- decode a modified user defined type |
c906108c | 3004 | |
c5aa993b | 3005 | SYNOPSIS |
c906108c | 3006 | |
c5aa993b | 3007 | static struct type *decode_mod_u_d_type (char *typedata) |
c906108c | 3008 | |
c5aa993b | 3009 | DESCRIPTION |
c906108c | 3010 | |
c5aa993b JM |
3011 | Decode a block of data containing a modified user defined |
3012 | type specification. TYPEDATA is a pointer to the block, | |
3013 | which consists of a two byte length, containing the size | |
3014 | of the rest of the block. At the end of the block is a | |
3015 | four byte value that gives a reference to a user defined type. | |
3016 | Everything in between are type modifiers. | |
c906108c | 3017 | |
c5aa993b JM |
3018 | We simply compute the number of modifiers and call the general |
3019 | function decode_modified_type to do the actual work. | |
3020 | */ | |
c906108c SS |
3021 | |
3022 | static struct type * | |
fba45db2 | 3023 | decode_mod_u_d_type (char *typedata) |
c906108c SS |
3024 | { |
3025 | struct type *typep = NULL; | |
3026 | unsigned short modcount; | |
3027 | int nbytes; | |
c5aa993b | 3028 | |
c906108c SS |
3029 | /* Get the total size of the block, exclusive of the size itself */ |
3030 | ||
3031 | nbytes = attribute_size (AT_mod_u_d_type); | |
3032 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3033 | typedata += nbytes; | |
3034 | ||
3035 | /* Deduct the size of the reference type bytes at the end of the block. */ | |
3036 | ||
3037 | modcount -= attribute_size (AT_user_def_type); | |
3038 | ||
3039 | /* Now do the actual decoding */ | |
3040 | ||
3041 | typep = decode_modified_type (typedata, modcount, AT_mod_u_d_type); | |
3042 | return (typep); | |
3043 | } | |
3044 | ||
3045 | /* | |
3046 | ||
c5aa993b | 3047 | LOCAL FUNCTION |
c906108c | 3048 | |
c5aa993b | 3049 | decode_modified_type -- decode modified user or fundamental type |
c906108c | 3050 | |
c5aa993b | 3051 | SYNOPSIS |
c906108c | 3052 | |
c5aa993b JM |
3053 | static struct type *decode_modified_type (char *modifiers, |
3054 | unsigned short modcount, int mtype) | |
c906108c | 3055 | |
c5aa993b | 3056 | DESCRIPTION |
c906108c | 3057 | |
c5aa993b JM |
3058 | Decode a modified type, either a modified fundamental type or |
3059 | a modified user defined type. MODIFIERS is a pointer to the | |
3060 | block of bytes that define MODCOUNT modifiers. Immediately | |
3061 | following the last modifier is a short containing the fundamental | |
3062 | type or a long containing the reference to the user defined | |
3063 | type. Which one is determined by MTYPE, which is either | |
3064 | AT_mod_fund_type or AT_mod_u_d_type to indicate what modified | |
3065 | type we are generating. | |
c906108c | 3066 | |
c5aa993b JM |
3067 | We call ourself recursively to generate each modified type,` |
3068 | until MODCOUNT reaches zero, at which point we have consumed | |
3069 | all the modifiers and generate either the fundamental type or | |
3070 | user defined type. When the recursion unwinds, each modifier | |
3071 | is applied in turn to generate the full modified type. | |
3072 | ||
3073 | NOTES | |
c906108c | 3074 | |
c5aa993b JM |
3075 | If we find a modifier that we don't recognize, and it is not one |
3076 | of those reserved for application specific use, then we issue a | |
3077 | warning and simply ignore the modifier. | |
c906108c | 3078 | |
c5aa993b | 3079 | BUGS |
c906108c | 3080 | |
c5aa993b | 3081 | We currently ignore MOD_const and MOD_volatile. (FIXME) |
c906108c SS |
3082 | |
3083 | */ | |
3084 | ||
3085 | static struct type * | |
fba45db2 | 3086 | decode_modified_type (char *modifiers, unsigned int modcount, int mtype) |
c906108c SS |
3087 | { |
3088 | struct type *typep = NULL; | |
3089 | unsigned short fundtype; | |
3090 | DIE_REF die_ref; | |
3091 | char modifier; | |
3092 | int nbytes; | |
c5aa993b | 3093 | |
c906108c SS |
3094 | if (modcount == 0) |
3095 | { | |
3096 | switch (mtype) | |
3097 | { | |
3098 | case AT_mod_fund_type: | |
3099 | nbytes = attribute_size (AT_fund_type); | |
3100 | fundtype = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3101 | current_objfile); | |
3102 | typep = decode_fund_type (fundtype); | |
3103 | break; | |
3104 | case AT_mod_u_d_type: | |
3105 | nbytes = attribute_size (AT_user_def_type); | |
3106 | die_ref = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3107 | current_objfile); | |
3108 | if ((typep = lookup_utype (die_ref)) == NULL) | |
3109 | { | |
3110 | typep = alloc_utype (die_ref, NULL); | |
3111 | } | |
3112 | break; | |
3113 | default: | |
23136709 KB |
3114 | complaint (&symfile_complaints, |
3115 | "DIE @ 0x%x \"%s\", botched modified type decoding (mtype 0x%x)", | |
3116 | DIE_ID, DIE_NAME, mtype); | |
c906108c SS |
3117 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
3118 | break; | |
3119 | } | |
3120 | } | |
3121 | else | |
3122 | { | |
3123 | modifier = *modifiers++; | |
3124 | typep = decode_modified_type (modifiers, --modcount, mtype); | |
3125 | switch (modifier) | |
3126 | { | |
c5aa993b JM |
3127 | case MOD_pointer_to: |
3128 | typep = lookup_pointer_type (typep); | |
3129 | break; | |
3130 | case MOD_reference_to: | |
3131 | typep = lookup_reference_type (typep); | |
3132 | break; | |
3133 | case MOD_const: | |
23136709 KB |
3134 | complaint (&symfile_complaints, |
3135 | "DIE @ 0x%x \"%s\", type modifier 'const' ignored", DIE_ID, | |
3136 | DIE_NAME); /* FIXME */ | |
c5aa993b JM |
3137 | break; |
3138 | case MOD_volatile: | |
23136709 KB |
3139 | complaint (&symfile_complaints, |
3140 | "DIE @ 0x%x \"%s\", type modifier 'volatile' ignored", | |
3141 | DIE_ID, DIE_NAME); /* FIXME */ | |
c5aa993b JM |
3142 | break; |
3143 | default: | |
3144 | if (!(MOD_lo_user <= (unsigned char) modifier | |
3145 | && (unsigned char) modifier <= MOD_hi_user)) | |
3146 | { | |
23136709 KB |
3147 | complaint (&symfile_complaints, |
3148 | "DIE @ 0x%x \"%s\", unknown type modifier %u", DIE_ID, | |
3149 | DIE_NAME, modifier); | |
c5aa993b JM |
3150 | } |
3151 | break; | |
c906108c SS |
3152 | } |
3153 | } | |
3154 | return (typep); | |
3155 | } | |
3156 | ||
3157 | /* | |
3158 | ||
c5aa993b | 3159 | LOCAL FUNCTION |
c906108c | 3160 | |
c5aa993b | 3161 | decode_fund_type -- translate basic DWARF type to gdb base type |
c906108c | 3162 | |
c5aa993b | 3163 | DESCRIPTION |
c906108c | 3164 | |
c5aa993b JM |
3165 | Given an integer that is one of the fundamental DWARF types, |
3166 | translate it to one of the basic internal gdb types and return | |
3167 | a pointer to the appropriate gdb type (a "struct type *"). | |
c906108c | 3168 | |
c5aa993b | 3169 | NOTES |
c906108c | 3170 | |
c5aa993b JM |
3171 | For robustness, if we are asked to translate a fundamental |
3172 | type that we are unprepared to deal with, we return int so | |
3173 | callers can always depend upon a valid type being returned, | |
3174 | and so gdb may at least do something reasonable by default. | |
3175 | If the type is not in the range of those types defined as | |
3176 | application specific types, we also issue a warning. | |
3177 | */ | |
c906108c SS |
3178 | |
3179 | static struct type * | |
fba45db2 | 3180 | decode_fund_type (unsigned int fundtype) |
c906108c SS |
3181 | { |
3182 | struct type *typep = NULL; | |
c5aa993b | 3183 | |
c906108c SS |
3184 | switch (fundtype) |
3185 | { | |
3186 | ||
3187 | case FT_void: | |
3188 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); | |
3189 | break; | |
c5aa993b | 3190 | |
c906108c SS |
3191 | case FT_boolean: /* Was FT_set in AT&T version */ |
3192 | typep = dwarf_fundamental_type (current_objfile, FT_BOOLEAN); | |
3193 | break; | |
3194 | ||
3195 | case FT_pointer: /* (void *) */ | |
3196 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); | |
3197 | typep = lookup_pointer_type (typep); | |
3198 | break; | |
c5aa993b | 3199 | |
c906108c SS |
3200 | case FT_char: |
3201 | typep = dwarf_fundamental_type (current_objfile, FT_CHAR); | |
3202 | break; | |
c5aa993b | 3203 | |
c906108c SS |
3204 | case FT_signed_char: |
3205 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_CHAR); | |
3206 | break; | |
3207 | ||
3208 | case FT_unsigned_char: | |
3209 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); | |
3210 | break; | |
c5aa993b | 3211 | |
c906108c SS |
3212 | case FT_short: |
3213 | typep = dwarf_fundamental_type (current_objfile, FT_SHORT); | |
3214 | break; | |
3215 | ||
3216 | case FT_signed_short: | |
3217 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_SHORT); | |
3218 | break; | |
c5aa993b | 3219 | |
c906108c SS |
3220 | case FT_unsigned_short: |
3221 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); | |
3222 | break; | |
c5aa993b | 3223 | |
c906108c SS |
3224 | case FT_integer: |
3225 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
3226 | break; | |
3227 | ||
3228 | case FT_signed_integer: | |
3229 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_INTEGER); | |
3230 | break; | |
c5aa993b | 3231 | |
c906108c SS |
3232 | case FT_unsigned_integer: |
3233 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); | |
3234 | break; | |
c5aa993b | 3235 | |
c906108c SS |
3236 | case FT_long: |
3237 | typep = dwarf_fundamental_type (current_objfile, FT_LONG); | |
3238 | break; | |
3239 | ||
3240 | case FT_signed_long: | |
3241 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG); | |
3242 | break; | |
c5aa993b | 3243 | |
c906108c SS |
3244 | case FT_unsigned_long: |
3245 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG); | |
3246 | break; | |
c5aa993b | 3247 | |
c906108c SS |
3248 | case FT_long_long: |
3249 | typep = dwarf_fundamental_type (current_objfile, FT_LONG_LONG); | |
3250 | break; | |
3251 | ||
3252 | case FT_signed_long_long: | |
3253 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG_LONG); | |
3254 | break; | |
3255 | ||
3256 | case FT_unsigned_long_long: | |
3257 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); | |
3258 | break; | |
3259 | ||
3260 | case FT_float: | |
3261 | typep = dwarf_fundamental_type (current_objfile, FT_FLOAT); | |
3262 | break; | |
c5aa993b | 3263 | |
c906108c SS |
3264 | case FT_dbl_prec_float: |
3265 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); | |
3266 | break; | |
c5aa993b | 3267 | |
c906108c SS |
3268 | case FT_ext_prec_float: |
3269 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); | |
3270 | break; | |
c5aa993b | 3271 | |
c906108c SS |
3272 | case FT_complex: |
3273 | typep = dwarf_fundamental_type (current_objfile, FT_COMPLEX); | |
3274 | break; | |
c5aa993b | 3275 | |
c906108c SS |
3276 | case FT_dbl_prec_complex: |
3277 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_COMPLEX); | |
3278 | break; | |
c5aa993b | 3279 | |
c906108c SS |
3280 | case FT_ext_prec_complex: |
3281 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_COMPLEX); | |
3282 | break; | |
c5aa993b | 3283 | |
c906108c SS |
3284 | } |
3285 | ||
3286 | if (typep == NULL) | |
3287 | { | |
3288 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
3289 | if (!(FT_lo_user <= fundtype && fundtype <= FT_hi_user)) | |
3290 | { | |
23136709 KB |
3291 | complaint (&symfile_complaints, |
3292 | "DIE @ 0x%x \"%s\", unexpected fundamental type 0x%x", | |
3293 | DIE_ID, DIE_NAME, fundtype); | |
c906108c SS |
3294 | } |
3295 | } | |
c5aa993b | 3296 | |
c906108c SS |
3297 | return (typep); |
3298 | } | |
3299 | ||
3300 | /* | |
3301 | ||
c5aa993b | 3302 | LOCAL FUNCTION |
c906108c | 3303 | |
c5aa993b | 3304 | create_name -- allocate a fresh copy of a string on an obstack |
c906108c | 3305 | |
c5aa993b | 3306 | DESCRIPTION |
c906108c | 3307 | |
c5aa993b JM |
3308 | Given a pointer to a string and a pointer to an obstack, allocates |
3309 | a fresh copy of the string on the specified obstack. | |
c906108c | 3310 | |
c5aa993b | 3311 | */ |
c906108c SS |
3312 | |
3313 | static char * | |
fba45db2 | 3314 | create_name (char *name, struct obstack *obstackp) |
c906108c SS |
3315 | { |
3316 | int length; | |
3317 | char *newname; | |
3318 | ||
3319 | length = strlen (name) + 1; | |
3320 | newname = (char *) obstack_alloc (obstackp, length); | |
3321 | strcpy (newname, name); | |
3322 | return (newname); | |
3323 | } | |
3324 | ||
3325 | /* | |
3326 | ||
c5aa993b | 3327 | LOCAL FUNCTION |
c906108c | 3328 | |
c5aa993b | 3329 | basicdieinfo -- extract the minimal die info from raw die data |
c906108c | 3330 | |
c5aa993b | 3331 | SYNOPSIS |
c906108c | 3332 | |
c5aa993b JM |
3333 | void basicdieinfo (char *diep, struct dieinfo *dip, |
3334 | struct objfile *objfile) | |
c906108c | 3335 | |
c5aa993b | 3336 | DESCRIPTION |
c906108c | 3337 | |
c5aa993b JM |
3338 | Given a pointer to raw DIE data, and a pointer to an instance of a |
3339 | die info structure, this function extracts the basic information | |
3340 | from the DIE data required to continue processing this DIE, along | |
3341 | with some bookkeeping information about the DIE. | |
c906108c | 3342 | |
c5aa993b JM |
3343 | The information we absolutely must have includes the DIE tag, |
3344 | and the DIE length. If we need the sibling reference, then we | |
3345 | will have to call completedieinfo() to process all the remaining | |
3346 | DIE information. | |
c906108c | 3347 | |
c5aa993b JM |
3348 | Note that since there is no guarantee that the data is properly |
3349 | aligned in memory for the type of access required (indirection | |
3350 | through anything other than a char pointer), and there is no | |
3351 | guarantee that it is in the same byte order as the gdb host, | |
3352 | we call a function which deals with both alignment and byte | |
3353 | swapping issues. Possibly inefficient, but quite portable. | |
c906108c | 3354 | |
c5aa993b JM |
3355 | We also take care of some other basic things at this point, such |
3356 | as ensuring that the instance of the die info structure starts | |
3357 | out completely zero'd and that curdie is initialized for use | |
3358 | in error reporting if we have a problem with the current die. | |
c906108c | 3359 | |
c5aa993b JM |
3360 | NOTES |
3361 | ||
3362 | All DIE's must have at least a valid length, thus the minimum | |
3363 | DIE size is SIZEOF_DIE_LENGTH. In order to have a valid tag, the | |
3364 | DIE size must be at least SIZEOF_DIE_TAG larger, otherwise they | |
3365 | are forced to be TAG_padding DIES. | |
c906108c | 3366 | |
c5aa993b JM |
3367 | Padding DIES must be at least SIZEOF_DIE_LENGTH in length, implying |
3368 | that if a padding DIE is used for alignment and the amount needed is | |
3369 | less than SIZEOF_DIE_LENGTH, then the padding DIE has to be big | |
3370 | enough to align to the next alignment boundry. | |
3371 | ||
3372 | We do some basic sanity checking here, such as verifying that the | |
3373 | length of the die would not cause it to overrun the recorded end of | |
3374 | the buffer holding the DIE info. If we find a DIE that is either | |
3375 | too small or too large, we force it's length to zero which should | |
3376 | cause the caller to take appropriate action. | |
c906108c SS |
3377 | */ |
3378 | ||
3379 | static void | |
fba45db2 | 3380 | basicdieinfo (struct dieinfo *dip, char *diep, struct objfile *objfile) |
c906108c SS |
3381 | { |
3382 | curdie = dip; | |
3383 | memset (dip, 0, sizeof (struct dieinfo)); | |
c5aa993b JM |
3384 | dip->die = diep; |
3385 | dip->die_ref = dbroff + (diep - dbbase); | |
3386 | dip->die_length = target_to_host (diep, SIZEOF_DIE_LENGTH, GET_UNSIGNED, | |
3387 | objfile); | |
3388 | if ((dip->die_length < SIZEOF_DIE_LENGTH) || | |
3389 | ((diep + dip->die_length) > (dbbase + dbsize))) | |
c906108c | 3390 | { |
23136709 KB |
3391 | complaint (&symfile_complaints, |
3392 | "DIE @ 0x%x \"%s\", malformed DIE, bad length (%ld bytes)", | |
3393 | DIE_ID, DIE_NAME, dip->die_length); | |
c5aa993b | 3394 | dip->die_length = 0; |
c906108c | 3395 | } |
c5aa993b | 3396 | else if (dip->die_length < (SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG)) |
c906108c | 3397 | { |
c5aa993b | 3398 | dip->die_tag = TAG_padding; |
c906108c SS |
3399 | } |
3400 | else | |
3401 | { | |
3402 | diep += SIZEOF_DIE_LENGTH; | |
c5aa993b JM |
3403 | dip->die_tag = target_to_host (diep, SIZEOF_DIE_TAG, GET_UNSIGNED, |
3404 | objfile); | |
c906108c SS |
3405 | } |
3406 | } | |
3407 | ||
3408 | /* | |
3409 | ||
c5aa993b | 3410 | LOCAL FUNCTION |
c906108c | 3411 | |
c5aa993b | 3412 | completedieinfo -- finish reading the information for a given DIE |
c906108c | 3413 | |
c5aa993b | 3414 | SYNOPSIS |
c906108c | 3415 | |
c5aa993b | 3416 | void completedieinfo (struct dieinfo *dip, struct objfile *objfile) |
c906108c | 3417 | |
c5aa993b | 3418 | DESCRIPTION |
c906108c | 3419 | |
c5aa993b JM |
3420 | Given a pointer to an already partially initialized die info structure, |
3421 | scan the raw DIE data and finish filling in the die info structure | |
3422 | from the various attributes found. | |
c906108c | 3423 | |
c5aa993b JM |
3424 | Note that since there is no guarantee that the data is properly |
3425 | aligned in memory for the type of access required (indirection | |
3426 | through anything other than a char pointer), and there is no | |
3427 | guarantee that it is in the same byte order as the gdb host, | |
3428 | we call a function which deals with both alignment and byte | |
3429 | swapping issues. Possibly inefficient, but quite portable. | |
c906108c | 3430 | |
c5aa993b JM |
3431 | NOTES |
3432 | ||
3433 | Each time we are called, we increment the diecount variable, which | |
3434 | keeps an approximate count of the number of dies processed for | |
3435 | each compilation unit. This information is presented to the user | |
3436 | if the info_verbose flag is set. | |
c906108c SS |
3437 | |
3438 | */ | |
3439 | ||
3440 | static void | |
fba45db2 | 3441 | completedieinfo (struct dieinfo *dip, struct objfile *objfile) |
c906108c SS |
3442 | { |
3443 | char *diep; /* Current pointer into raw DIE data */ | |
3444 | char *end; /* Terminate DIE scan here */ | |
3445 | unsigned short attr; /* Current attribute being scanned */ | |
3446 | unsigned short form; /* Form of the attribute */ | |
3447 | int nbytes; /* Size of next field to read */ | |
c5aa993b | 3448 | |
c906108c | 3449 | diecount++; |
c5aa993b JM |
3450 | diep = dip->die; |
3451 | end = diep + dip->die_length; | |
c906108c SS |
3452 | diep += SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG; |
3453 | while (diep < end) | |
3454 | { | |
3455 | attr = target_to_host (diep, SIZEOF_ATTRIBUTE, GET_UNSIGNED, objfile); | |
3456 | diep += SIZEOF_ATTRIBUTE; | |
3457 | if ((nbytes = attribute_size (attr)) == -1) | |
3458 | { | |
23136709 KB |
3459 | complaint (&symfile_complaints, |
3460 | "DIE @ 0x%x \"%s\", unknown attribute length, skipped remaining attributes", | |
3461 | DIE_ID, DIE_NAME); | |
c906108c SS |
3462 | diep = end; |
3463 | continue; | |
3464 | } | |
3465 | switch (attr) | |
3466 | { | |
3467 | case AT_fund_type: | |
c5aa993b JM |
3468 | dip->at_fund_type = target_to_host (diep, nbytes, GET_UNSIGNED, |
3469 | objfile); | |
c906108c SS |
3470 | break; |
3471 | case AT_ordering: | |
c5aa993b JM |
3472 | dip->at_ordering = target_to_host (diep, nbytes, GET_UNSIGNED, |
3473 | objfile); | |
c906108c SS |
3474 | break; |
3475 | case AT_bit_offset: | |
c5aa993b JM |
3476 | dip->at_bit_offset = target_to_host (diep, nbytes, GET_UNSIGNED, |
3477 | objfile); | |
c906108c SS |
3478 | break; |
3479 | case AT_sibling: | |
c5aa993b JM |
3480 | dip->at_sibling = target_to_host (diep, nbytes, GET_UNSIGNED, |
3481 | objfile); | |
c906108c SS |
3482 | break; |
3483 | case AT_stmt_list: | |
c5aa993b JM |
3484 | dip->at_stmt_list = target_to_host (diep, nbytes, GET_UNSIGNED, |
3485 | objfile); | |
3486 | dip->has_at_stmt_list = 1; | |
c906108c SS |
3487 | break; |
3488 | case AT_low_pc: | |
c5aa993b JM |
3489 | dip->at_low_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3490 | objfile); | |
3491 | dip->at_low_pc += baseaddr; | |
3492 | dip->has_at_low_pc = 1; | |
c906108c SS |
3493 | break; |
3494 | case AT_high_pc: | |
c5aa993b JM |
3495 | dip->at_high_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3496 | objfile); | |
3497 | dip->at_high_pc += baseaddr; | |
c906108c SS |
3498 | break; |
3499 | case AT_language: | |
c5aa993b JM |
3500 | dip->at_language = target_to_host (diep, nbytes, GET_UNSIGNED, |
3501 | objfile); | |
c906108c SS |
3502 | break; |
3503 | case AT_user_def_type: | |
c5aa993b JM |
3504 | dip->at_user_def_type = target_to_host (diep, nbytes, |
3505 | GET_UNSIGNED, objfile); | |
c906108c SS |
3506 | break; |
3507 | case AT_byte_size: | |
c5aa993b JM |
3508 | dip->at_byte_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3509 | objfile); | |
3510 | dip->has_at_byte_size = 1; | |
c906108c SS |
3511 | break; |
3512 | case AT_bit_size: | |
c5aa993b JM |
3513 | dip->at_bit_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3514 | objfile); | |
c906108c SS |
3515 | break; |
3516 | case AT_member: | |
c5aa993b JM |
3517 | dip->at_member = target_to_host (diep, nbytes, GET_UNSIGNED, |
3518 | objfile); | |
c906108c SS |
3519 | break; |
3520 | case AT_discr: | |
c5aa993b JM |
3521 | dip->at_discr = target_to_host (diep, nbytes, GET_UNSIGNED, |
3522 | objfile); | |
c906108c SS |
3523 | break; |
3524 | case AT_location: | |
c5aa993b | 3525 | dip->at_location = diep; |
c906108c SS |
3526 | break; |
3527 | case AT_mod_fund_type: | |
c5aa993b | 3528 | dip->at_mod_fund_type = diep; |
c906108c SS |
3529 | break; |
3530 | case AT_subscr_data: | |
c5aa993b | 3531 | dip->at_subscr_data = diep; |
c906108c SS |
3532 | break; |
3533 | case AT_mod_u_d_type: | |
c5aa993b | 3534 | dip->at_mod_u_d_type = diep; |
c906108c SS |
3535 | break; |
3536 | case AT_element_list: | |
c5aa993b JM |
3537 | dip->at_element_list = diep; |
3538 | dip->short_element_list = 0; | |
c906108c SS |
3539 | break; |
3540 | case AT_short_element_list: | |
c5aa993b JM |
3541 | dip->at_element_list = diep; |
3542 | dip->short_element_list = 1; | |
c906108c SS |
3543 | break; |
3544 | case AT_discr_value: | |
c5aa993b | 3545 | dip->at_discr_value = diep; |
c906108c SS |
3546 | break; |
3547 | case AT_string_length: | |
c5aa993b | 3548 | dip->at_string_length = diep; |
c906108c SS |
3549 | break; |
3550 | case AT_name: | |
c5aa993b | 3551 | dip->at_name = diep; |
c906108c SS |
3552 | break; |
3553 | case AT_comp_dir: | |
3554 | /* For now, ignore any "hostname:" portion, since gdb doesn't | |
3555 | know how to deal with it. (FIXME). */ | |
c5aa993b JM |
3556 | dip->at_comp_dir = strrchr (diep, ':'); |
3557 | if (dip->at_comp_dir != NULL) | |
c906108c | 3558 | { |
c5aa993b | 3559 | dip->at_comp_dir++; |
c906108c SS |
3560 | } |
3561 | else | |
3562 | { | |
c5aa993b | 3563 | dip->at_comp_dir = diep; |
c906108c SS |
3564 | } |
3565 | break; | |
3566 | case AT_producer: | |
c5aa993b | 3567 | dip->at_producer = diep; |
c906108c SS |
3568 | break; |
3569 | case AT_start_scope: | |
c5aa993b JM |
3570 | dip->at_start_scope = target_to_host (diep, nbytes, GET_UNSIGNED, |
3571 | objfile); | |
c906108c SS |
3572 | break; |
3573 | case AT_stride_size: | |
c5aa993b JM |
3574 | dip->at_stride_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3575 | objfile); | |
c906108c SS |
3576 | break; |
3577 | case AT_src_info: | |
c5aa993b JM |
3578 | dip->at_src_info = target_to_host (diep, nbytes, GET_UNSIGNED, |
3579 | objfile); | |
c906108c SS |
3580 | break; |
3581 | case AT_prototyped: | |
c5aa993b | 3582 | dip->at_prototyped = diep; |
c906108c SS |
3583 | break; |
3584 | default: | |
3585 | /* Found an attribute that we are unprepared to handle. However | |
3586 | it is specifically one of the design goals of DWARF that | |
3587 | consumers should ignore unknown attributes. As long as the | |
3588 | form is one that we recognize (so we know how to skip it), | |
3589 | we can just ignore the unknown attribute. */ | |
3590 | break; | |
3591 | } | |
3592 | form = FORM_FROM_ATTR (attr); | |
3593 | switch (form) | |
3594 | { | |
3595 | case FORM_DATA2: | |
3596 | diep += 2; | |
3597 | break; | |
3598 | case FORM_DATA4: | |
3599 | case FORM_REF: | |
3600 | diep += 4; | |
3601 | break; | |
3602 | case FORM_DATA8: | |
3603 | diep += 8; | |
3604 | break; | |
3605 | case FORM_ADDR: | |
3606 | diep += TARGET_FT_POINTER_SIZE (objfile); | |
3607 | break; | |
3608 | case FORM_BLOCK2: | |
3609 | diep += 2 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); | |
3610 | break; | |
3611 | case FORM_BLOCK4: | |
3612 | diep += 4 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); | |
3613 | break; | |
3614 | case FORM_STRING: | |
3615 | diep += strlen (diep) + 1; | |
3616 | break; | |
3617 | default: | |
23136709 | 3618 | unknown_attribute_form_complaint (DIE_ID, DIE_NAME, form); |
c906108c SS |
3619 | diep = end; |
3620 | break; | |
3621 | } | |
3622 | } | |
3623 | } | |
3624 | ||
3625 | /* | |
3626 | ||
c5aa993b | 3627 | LOCAL FUNCTION |
c906108c | 3628 | |
c5aa993b | 3629 | target_to_host -- swap in target data to host |
c906108c | 3630 | |
c5aa993b | 3631 | SYNOPSIS |
c906108c | 3632 | |
c5aa993b JM |
3633 | target_to_host (char *from, int nbytes, int signextend, |
3634 | struct objfile *objfile) | |
c906108c | 3635 | |
c5aa993b | 3636 | DESCRIPTION |
c906108c | 3637 | |
c5aa993b JM |
3638 | Given pointer to data in target format in FROM, a byte count for |
3639 | the size of the data in NBYTES, a flag indicating whether or not | |
3640 | the data is signed in SIGNEXTEND, and a pointer to the current | |
3641 | objfile in OBJFILE, convert the data to host format and return | |
3642 | the converted value. | |
c906108c | 3643 | |
c5aa993b | 3644 | NOTES |
c906108c | 3645 | |
c5aa993b JM |
3646 | FIXME: If we read data that is known to be signed, and expect to |
3647 | use it as signed data, then we need to explicitly sign extend the | |
3648 | result until the bfd library is able to do this for us. | |
c906108c | 3649 | |
c5aa993b | 3650 | FIXME: Would a 32 bit target ever need an 8 byte result? |
c906108c SS |
3651 | |
3652 | */ | |
3653 | ||
3654 | static CORE_ADDR | |
fba45db2 KB |
3655 | target_to_host (char *from, int nbytes, int signextend, /* FIXME: Unused */ |
3656 | struct objfile *objfile) | |
c906108c SS |
3657 | { |
3658 | CORE_ADDR rtnval; | |
3659 | ||
3660 | switch (nbytes) | |
3661 | { | |
c5aa993b JM |
3662 | case 8: |
3663 | rtnval = bfd_get_64 (objfile->obfd, (bfd_byte *) from); | |
3664 | break; | |
3665 | case 4: | |
3666 | rtnval = bfd_get_32 (objfile->obfd, (bfd_byte *) from); | |
3667 | break; | |
3668 | case 2: | |
3669 | rtnval = bfd_get_16 (objfile->obfd, (bfd_byte *) from); | |
3670 | break; | |
3671 | case 1: | |
3672 | rtnval = bfd_get_8 (objfile->obfd, (bfd_byte *) from); | |
3673 | break; | |
3674 | default: | |
23136709 KB |
3675 | complaint (&symfile_complaints, |
3676 | "DIE @ 0x%x \"%s\", no bfd support for %d byte data object", | |
3677 | DIE_ID, DIE_NAME, nbytes); | |
c5aa993b JM |
3678 | rtnval = 0; |
3679 | break; | |
c906108c SS |
3680 | } |
3681 | return (rtnval); | |
3682 | } | |
3683 | ||
3684 | /* | |
3685 | ||
c5aa993b | 3686 | LOCAL FUNCTION |
c906108c | 3687 | |
c5aa993b | 3688 | attribute_size -- compute size of data for a DWARF attribute |
c906108c | 3689 | |
c5aa993b | 3690 | SYNOPSIS |
c906108c | 3691 | |
c5aa993b | 3692 | static int attribute_size (unsigned int attr) |
c906108c | 3693 | |
c5aa993b | 3694 | DESCRIPTION |
c906108c | 3695 | |
c5aa993b JM |
3696 | Given a DWARF attribute in ATTR, compute the size of the first |
3697 | piece of data associated with this attribute and return that | |
3698 | size. | |
c906108c | 3699 | |
c5aa993b | 3700 | Returns -1 for unrecognized attributes. |
c906108c SS |
3701 | |
3702 | */ | |
3703 | ||
3704 | static int | |
fba45db2 | 3705 | attribute_size (unsigned int attr) |
c906108c SS |
3706 | { |
3707 | int nbytes; /* Size of next data for this attribute */ | |
3708 | unsigned short form; /* Form of the attribute */ | |
3709 | ||
3710 | form = FORM_FROM_ATTR (attr); | |
3711 | switch (form) | |
3712 | { | |
c5aa993b JM |
3713 | case FORM_STRING: /* A variable length field is next */ |
3714 | nbytes = 0; | |
3715 | break; | |
3716 | case FORM_DATA2: /* Next 2 byte field is the data itself */ | |
3717 | case FORM_BLOCK2: /* Next 2 byte field is a block length */ | |
3718 | nbytes = 2; | |
3719 | break; | |
3720 | case FORM_DATA4: /* Next 4 byte field is the data itself */ | |
3721 | case FORM_BLOCK4: /* Next 4 byte field is a block length */ | |
3722 | case FORM_REF: /* Next 4 byte field is a DIE offset */ | |
3723 | nbytes = 4; | |
3724 | break; | |
3725 | case FORM_DATA8: /* Next 8 byte field is the data itself */ | |
3726 | nbytes = 8; | |
3727 | break; | |
3728 | case FORM_ADDR: /* Next field size is target sizeof(void *) */ | |
3729 | nbytes = TARGET_FT_POINTER_SIZE (objfile); | |
3730 | break; | |
3731 | default: | |
23136709 | 3732 | unknown_attribute_form_complaint (DIE_ID, DIE_NAME, form); |
c5aa993b JM |
3733 | nbytes = -1; |
3734 | break; | |
3735 | } | |
c906108c SS |
3736 | return (nbytes); |
3737 | } |