Commit | Line | Data |
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35f5886e | 1 | /* DWARF debugging format support for GDB. |
1ab3bf1b JG |
2 | Copyright (C) 1991, 1992 Free Software Foundation, Inc. |
3 | Written by Fred Fish at Cygnus Support. Portions based on dbxread.c, | |
35f5886e FF |
4 | mipsread.c, coffread.c, and dwarfread.c from a Data General SVR4 gdb port. |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
21 | ||
22 | /* | |
23 | ||
24 | FIXME: Figure out how to get the frame pointer register number in the | |
25 | execution environment of the target. Remove R_FP kludge | |
26 | ||
27 | FIXME: Add generation of dependencies list to partial symtab code. | |
28 | ||
35f5886e FF |
29 | FIXME: Resolve minor differences between what information we put in the |
30 | partial symbol table and what dbxread puts in. For example, we don't yet | |
31 | put enum constants there. And dbxread seems to invent a lot of typedefs | |
32 | we never see. Use the new printpsym command to see the partial symbol table | |
33 | contents. | |
34 | ||
35f5886e FF |
35 | FIXME: Figure out a better way to tell gdb about the name of the function |
36 | contain the user's entry point (I.E. main()) | |
37 | ||
35f5886e FF |
38 | FIXME: See other FIXME's and "ifdef 0" scattered throughout the code for |
39 | other things to work on, if you get bored. :-) | |
40 | ||
41 | */ | |
4d315a07 | 42 | |
d747e0af | 43 | #include "defs.h" |
35f5886e FF |
44 | #include "bfd.h" |
45 | #include "symtab.h" | |
1ab3bf1b | 46 | #include "gdbtypes.h" |
35f5886e | 47 | #include "symfile.h" |
5e2e79f8 | 48 | #include "objfiles.h" |
13b5a7ff | 49 | #include "libbfd.h" /* FIXME Secret Internal BFD stuff (bfd_read) */ |
f5f0679a | 50 | #include "elf/dwarf.h" |
4d315a07 | 51 | #include "buildsym.h" |
2dbde378 | 52 | #include "demangle.h" |
35f5886e | 53 | |
d5931d79 JG |
54 | #include <varargs.h> |
55 | #include <fcntl.h> | |
56 | #include <string.h> | |
57 | #ifndef NO_SYS_FILE | |
58 | #include <sys/file.h> | |
59 | #endif | |
60 | ||
61 | /* FIXME -- convert this to SEEK_SET a la POSIX, move to config files. */ | |
62 | #ifndef L_SET | |
63 | #define L_SET 0 | |
64 | #endif | |
65 | ||
35f5886e FF |
66 | #ifdef MAINTENANCE /* Define to 1 to compile in some maintenance stuff */ |
67 | #define SQUAWK(stuff) dwarfwarn stuff | |
68 | #else | |
69 | #define SQUAWK(stuff) | |
70 | #endif | |
71 | ||
72 | #ifndef R_FP /* FIXME */ | |
73 | #define R_FP 14 /* Kludge to get frame pointer register number */ | |
74 | #endif | |
75 | ||
13b5a7ff | 76 | typedef unsigned int DIE_REF; /* Reference to a DIE */ |
35f5886e | 77 | |
4d315a07 FF |
78 | #ifndef GCC_PRODUCER |
79 | #define GCC_PRODUCER "GNU C " | |
80 | #endif | |
35f5886e | 81 | |
2dbde378 FF |
82 | #ifndef GPLUS_PRODUCER |
83 | #define GPLUS_PRODUCER "GNU C++ " | |
84 | #endif | |
85 | ||
86 | #ifndef LCC_PRODUCER | |
3dc755fb | 87 | #define LCC_PRODUCER "NCR C/C++" |
2dbde378 FF |
88 | #endif |
89 | ||
90 | #ifndef CFRONT_PRODUCER | |
91 | #define CFRONT_PRODUCER "CFRONT " /* A wild a** guess... */ | |
92 | #endif | |
93 | ||
35f5886e | 94 | #define STREQ(a,b) (strcmp(a,b)==0) |
4d315a07 | 95 | #define STREQN(a,b,n) (strncmp(a,b,n)==0) |
35f5886e | 96 | |
13b5a7ff FF |
97 | /* Flags to target_to_host() that tell whether or not the data object is |
98 | expected to be signed. Used, for example, when fetching a signed | |
99 | integer in the target environment which is used as a signed integer | |
100 | in the host environment, and the two environments have different sized | |
101 | ints. In this case, *somebody* has to sign extend the smaller sized | |
102 | int. */ | |
103 | ||
104 | #define GET_UNSIGNED 0 /* No sign extension required */ | |
105 | #define GET_SIGNED 1 /* Sign extension required */ | |
106 | ||
107 | /* Defines for things which are specified in the document "DWARF Debugging | |
108 | Information Format" published by UNIX International, Programming Languages | |
109 | SIG. These defines are based on revision 1.0.0, Jan 20, 1992. */ | |
110 | ||
111 | #define SIZEOF_DIE_LENGTH 4 | |
112 | #define SIZEOF_DIE_TAG 2 | |
113 | #define SIZEOF_ATTRIBUTE 2 | |
114 | #define SIZEOF_FORMAT_SPECIFIER 1 | |
115 | #define SIZEOF_FMT_FT 2 | |
116 | #define SIZEOF_LINETBL_LENGTH 4 | |
117 | #define SIZEOF_LINETBL_LINENO 4 | |
118 | #define SIZEOF_LINETBL_STMT 2 | |
119 | #define SIZEOF_LINETBL_DELTA 4 | |
120 | #define SIZEOF_LOC_ATOM_CODE 1 | |
121 | ||
122 | #define FORM_FROM_ATTR(attr) ((attr) & 0xF) /* Implicitly specified */ | |
123 | ||
124 | /* Macros that return the sizes of various types of data in the target | |
125 | environment. | |
126 | ||
2d6d969c FF |
127 | FIXME: Currently these are just compile time constants (as they are in |
128 | other parts of gdb as well). They need to be able to get the right size | |
129 | either from the bfd or possibly from the DWARF info. It would be nice if | |
130 | the DWARF producer inserted DIES that describe the fundamental types in | |
131 | the target environment into the DWARF info, similar to the way dbx stabs | |
132 | producers produce information about their fundamental types. */ | |
133 | ||
134 | #define TARGET_FT_POINTER_SIZE(objfile) (TARGET_PTR_BIT / TARGET_CHAR_BIT) | |
135 | #define TARGET_FT_LONG_SIZE(objfile) (TARGET_LONG_BIT / TARGET_CHAR_BIT) | |
95967e73 | 136 | |
768be6e1 FF |
137 | /* The Amiga SVR4 header file <dwarf.h> defines AT_element_list as a |
138 | FORM_BLOCK2, and this is the value emitted by the AT&T compiler. | |
139 | However, the Issue 2 DWARF specification from AT&T defines it as | |
140 | a FORM_BLOCK4, as does the latest specification from UI/PLSIG. | |
141 | For backwards compatibility with the AT&T compiler produced executables | |
142 | we define AT_short_element_list for this variant. */ | |
143 | ||
144 | #define AT_short_element_list (0x00f0|FORM_BLOCK2) | |
145 | ||
146 | /* External variables referenced. */ | |
147 | ||
35f5886e | 148 | extern int info_verbose; /* From main.c; nonzero => verbose */ |
318bf84f | 149 | extern char *warning_pre_print; /* From utils.c */ |
35f5886e FF |
150 | |
151 | /* The DWARF debugging information consists of two major pieces, | |
152 | one is a block of DWARF Information Entries (DIE's) and the other | |
153 | is a line number table. The "struct dieinfo" structure contains | |
154 | the information for a single DIE, the one currently being processed. | |
155 | ||
156 | In order to make it easier to randomly access the attribute fields | |
13b5a7ff | 157 | of the current DIE, which are specifically unordered within the DIE, |
35f5886e FF |
158 | each DIE is scanned and an instance of the "struct dieinfo" |
159 | structure is initialized. | |
160 | ||
161 | Initialization is done in two levels. The first, done by basicdieinfo(), | |
162 | just initializes those fields that are vital to deciding whether or not | |
163 | to use this DIE, how to skip past it, etc. The second, done by the | |
164 | function completedieinfo(), fills in the rest of the information. | |
165 | ||
166 | Attributes which have block forms are not interpreted at the time | |
167 | the DIE is scanned, instead we just save pointers to the start | |
168 | of their value fields. | |
169 | ||
170 | Some fields have a flag <name>_p that is set when the value of the | |
171 | field is valid (I.E. we found a matching attribute in the DIE). Since | |
172 | we may want to test for the presence of some attributes in the DIE, | |
2d6186f4 | 173 | such as AT_low_pc, without restricting the values of the field, |
35f5886e FF |
174 | we need someway to note that we found such an attribute. |
175 | ||
176 | */ | |
177 | ||
178 | typedef char BLOCK; | |
179 | ||
180 | struct dieinfo { | |
13b5a7ff FF |
181 | char * die; /* Pointer to the raw DIE data */ |
182 | unsigned long die_length; /* Length of the raw DIE data */ | |
183 | DIE_REF die_ref; /* Offset of this DIE */ | |
184 | unsigned short die_tag; /* Tag for this DIE */ | |
185 | unsigned long at_padding; | |
186 | unsigned long at_sibling; | |
187 | BLOCK * at_location; | |
188 | char * at_name; | |
189 | unsigned short at_fund_type; | |
190 | BLOCK * at_mod_fund_type; | |
191 | unsigned long at_user_def_type; | |
192 | BLOCK * at_mod_u_d_type; | |
193 | unsigned short at_ordering; | |
194 | BLOCK * at_subscr_data; | |
195 | unsigned long at_byte_size; | |
196 | unsigned short at_bit_offset; | |
197 | unsigned long at_bit_size; | |
198 | BLOCK * at_element_list; | |
199 | unsigned long at_stmt_list; | |
200 | unsigned long at_low_pc; | |
201 | unsigned long at_high_pc; | |
202 | unsigned long at_language; | |
203 | unsigned long at_member; | |
204 | unsigned long at_discr; | |
205 | BLOCK * at_discr_value; | |
13b5a7ff FF |
206 | BLOCK * at_string_length; |
207 | char * at_comp_dir; | |
208 | char * at_producer; | |
13b5a7ff FF |
209 | unsigned long at_start_scope; |
210 | unsigned long at_stride_size; | |
211 | unsigned long at_src_info; | |
212 | char * at_prototyped; | |
213 | unsigned int has_at_low_pc:1; | |
214 | unsigned int has_at_stmt_list:1; | |
50055e94 | 215 | unsigned int has_at_byte_size:1; |
13b5a7ff | 216 | unsigned int short_element_list:1; |
35f5886e FF |
217 | }; |
218 | ||
219 | static int diecount; /* Approximate count of dies for compilation unit */ | |
220 | static struct dieinfo *curdie; /* For warnings and such */ | |
221 | ||
222 | static char *dbbase; /* Base pointer to dwarf info */ | |
4090fe1c | 223 | static int dbsize; /* Size of dwarf info in bytes */ |
35f5886e FF |
224 | static int dbroff; /* Relative offset from start of .debug section */ |
225 | static char *lnbase; /* Base pointer to line section */ | |
226 | static int isreg; /* Kludge to identify register variables */ | |
a5bd5ba6 | 227 | static int offreg; /* Kludge to identify basereg references */ |
35f5886e | 228 | |
2670f34d JG |
229 | /* This value is added to each symbol value. FIXME: Generalize to |
230 | the section_offsets structure used by dbxread. */ | |
35f5886e FF |
231 | static CORE_ADDR baseaddr; /* Add to each symbol value */ |
232 | ||
2670f34d JG |
233 | /* The section offsets used in the current psymtab or symtab. FIXME, |
234 | only used to pass one value (baseaddr) at the moment. */ | |
235 | static struct section_offsets *base_section_offsets; | |
236 | ||
35f5886e FF |
237 | /* Each partial symbol table entry contains a pointer to private data for the |
238 | read_symtab() function to use when expanding a partial symbol table entry | |
239 | to a full symbol table entry. For DWARF debugging info, this data is | |
240 | contained in the following structure and macros are provided for easy | |
241 | access to the members given a pointer to a partial symbol table entry. | |
242 | ||
243 | dbfoff Always the absolute file offset to the start of the ".debug" | |
244 | section for the file containing the DIE's being accessed. | |
245 | ||
246 | dbroff Relative offset from the start of the ".debug" access to the | |
247 | first DIE to be accessed. When building the partial symbol | |
248 | table, this value will be zero since we are accessing the | |
249 | entire ".debug" section. When expanding a partial symbol | |
250 | table entry, this value will be the offset to the first | |
251 | DIE for the compilation unit containing the symbol that | |
252 | triggers the expansion. | |
253 | ||
254 | dblength The size of the chunk of DIE's being examined, in bytes. | |
255 | ||
256 | lnfoff The absolute file offset to the line table fragment. Ignored | |
257 | when building partial symbol tables, but used when expanding | |
258 | them, and contains the absolute file offset to the fragment | |
259 | of the ".line" section containing the line numbers for the | |
260 | current compilation unit. | |
261 | */ | |
262 | ||
263 | struct dwfinfo { | |
d5931d79 | 264 | file_ptr dbfoff; /* Absolute file offset to start of .debug section */ |
35f5886e FF |
265 | int dbroff; /* Relative offset from start of .debug section */ |
266 | int dblength; /* Size of the chunk of DIE's being examined */ | |
d5931d79 | 267 | file_ptr lnfoff; /* Absolute file offset to line table fragment */ |
35f5886e FF |
268 | }; |
269 | ||
270 | #define DBFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbfoff) | |
271 | #define DBROFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbroff) | |
272 | #define DBLENGTH(p) (((struct dwfinfo *)((p)->read_symtab_private))->dblength) | |
273 | #define LNFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->lnfoff) | |
274 | ||
4d315a07 FF |
275 | /* The generic symbol table building routines have separate lists for |
276 | file scope symbols and all all other scopes (local scopes). So | |
277 | we need to select the right one to pass to add_symbol_to_list(). | |
278 | We do it by keeping a pointer to the correct list in list_in_scope. | |
35f5886e | 279 | |
4d315a07 FF |
280 | FIXME: The original dwarf code just treated the file scope as the first |
281 | local scope, and all other local scopes as nested local scopes, and worked | |
282 | fine. Check to see if we really need to distinguish these in buildsym.c */ | |
35f5886e | 283 | |
99140c31 | 284 | struct pending **list_in_scope = &file_symbols; |
35f5886e FF |
285 | |
286 | /* DIES which have user defined types or modified user defined types refer to | |
287 | other DIES for the type information. Thus we need to associate the offset | |
288 | of a DIE for a user defined type with a pointer to the type information. | |
289 | ||
290 | Originally this was done using a simple but expensive algorithm, with an | |
291 | array of unsorted structures, each containing an offset/type-pointer pair. | |
292 | This array was scanned linearly each time a lookup was done. The result | |
293 | was that gdb was spending over half it's startup time munging through this | |
294 | array of pointers looking for a structure that had the right offset member. | |
295 | ||
296 | The second attempt used the same array of structures, but the array was | |
297 | sorted using qsort each time a new offset/type was recorded, and a binary | |
298 | search was used to find the type pointer for a given DIE offset. This was | |
299 | even slower, due to the overhead of sorting the array each time a new | |
300 | offset/type pair was entered. | |
301 | ||
302 | The third attempt uses a fixed size array of type pointers, indexed by a | |
303 | value derived from the DIE offset. Since the minimum DIE size is 4 bytes, | |
304 | we can divide any DIE offset by 4 to obtain a unique index into this fixed | |
305 | size array. Since each element is a 4 byte pointer, it takes exactly as | |
306 | much memory to hold this array as to hold the DWARF info for a given | |
307 | compilation unit. But it gets freed as soon as we are done with it. */ | |
308 | ||
309 | static struct type **utypes; /* Pointer to array of user type pointers */ | |
310 | static int numutypes; /* Max number of user type pointers */ | |
311 | ||
95ff889e FF |
312 | /* Record the language for the compilation unit which is currently being |
313 | processed. We know it once we have seen the TAG_compile_unit DIE, | |
314 | and we need it while processing the DIE's for that compilation unit. | |
315 | It is eventually saved in the symtab structure, but we don't finalize | |
316 | the symtab struct until we have processed all the DIE's for the | |
317 | compilation unit. */ | |
318 | ||
319 | static enum language cu_language; | |
320 | ||
35f5886e | 321 | /* Forward declarations of static functions so we don't have to worry |
1ab3bf1b JG |
322 | about ordering within this file. */ |
323 | ||
13b5a7ff FF |
324 | static int |
325 | attribute_size PARAMS ((unsigned int)); | |
326 | ||
327 | static unsigned long | |
328 | target_to_host PARAMS ((char *, int, int, struct objfile *)); | |
95967e73 | 329 | |
1ab3bf1b JG |
330 | static void |
331 | add_enum_psymbol PARAMS ((struct dieinfo *, struct objfile *)); | |
332 | ||
2dbde378 FF |
333 | static void |
334 | handle_producer PARAMS ((char *)); | |
335 | ||
1ab3bf1b JG |
336 | static void |
337 | read_file_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); | |
35f5886e | 338 | |
58050209 | 339 | static void |
1ab3bf1b | 340 | read_func_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
341 | |
342 | static void | |
1ab3bf1b JG |
343 | read_lexical_block_scope PARAMS ((struct dieinfo *, char *, char *, |
344 | struct objfile *)); | |
35f5886e FF |
345 | |
346 | static void | |
1ab3bf1b | 347 | dwarfwarn (); |
4d315a07 | 348 | |
35f5886e | 349 | static void |
1ab3bf1b | 350 | scan_partial_symbols PARAMS ((char *, char *, struct objfile *)); |
35f5886e | 351 | |
35f5886e | 352 | static void |
d5931d79 JG |
353 | scan_compilation_units PARAMS ((char *, char *, file_ptr, |
354 | file_ptr, struct objfile *)); | |
35f5886e FF |
355 | |
356 | static void | |
1ab3bf1b | 357 | add_partial_symbol PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e FF |
358 | |
359 | static void | |
1ab3bf1b | 360 | init_psymbol_list PARAMS ((struct objfile *, int)); |
35f5886e FF |
361 | |
362 | static void | |
95967e73 | 363 | basicdieinfo PARAMS ((struct dieinfo *, char *, struct objfile *)); |
35f5886e FF |
364 | |
365 | static void | |
95967e73 | 366 | completedieinfo PARAMS ((struct dieinfo *, struct objfile *)); |
1ab3bf1b JG |
367 | |
368 | static void | |
369 | dwarf_psymtab_to_symtab PARAMS ((struct partial_symtab *)); | |
370 | ||
371 | static void | |
372 | psymtab_to_symtab_1 PARAMS ((struct partial_symtab *)); | |
35f5886e FF |
373 | |
374 | static struct symtab * | |
1ab3bf1b | 375 | read_ofile_symtab PARAMS ((struct partial_symtab *)); |
35f5886e FF |
376 | |
377 | static void | |
1ab3bf1b | 378 | process_dies PARAMS ((char *, char *, struct objfile *)); |
35f5886e FF |
379 | |
380 | static void | |
1ab3bf1b JG |
381 | read_structure_scope PARAMS ((struct dieinfo *, char *, char *, |
382 | struct objfile *)); | |
35f5886e FF |
383 | |
384 | static struct type * | |
84ffdec2 | 385 | decode_array_element_type PARAMS ((char *)); |
35f5886e FF |
386 | |
387 | static struct type * | |
1ab3bf1b | 388 | decode_subscr_data PARAMS ((char *, char *)); |
35f5886e FF |
389 | |
390 | static void | |
1ab3bf1b | 391 | dwarf_read_array_type PARAMS ((struct dieinfo *)); |
35f5886e | 392 | |
9e4c1921 | 393 | static void |
1ab3bf1b | 394 | read_tag_pointer_type PARAMS ((struct dieinfo *dip)); |
9e4c1921 | 395 | |
35f5886e | 396 | static void |
1ab3bf1b | 397 | read_subroutine_type PARAMS ((struct dieinfo *, char *, char *)); |
35f5886e FF |
398 | |
399 | static void | |
1ab3bf1b | 400 | read_enumeration PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
401 | |
402 | static struct type * | |
1ab3bf1b | 403 | struct_type PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
404 | |
405 | static struct type * | |
1ab3bf1b | 406 | enum_type PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e | 407 | |
35f5886e | 408 | static void |
1ab3bf1b | 409 | decode_line_numbers PARAMS ((char *)); |
35f5886e FF |
410 | |
411 | static struct type * | |
1ab3bf1b | 412 | decode_die_type PARAMS ((struct dieinfo *)); |
35f5886e FF |
413 | |
414 | static struct type * | |
1ab3bf1b | 415 | decode_mod_fund_type PARAMS ((char *)); |
35f5886e FF |
416 | |
417 | static struct type * | |
1ab3bf1b | 418 | decode_mod_u_d_type PARAMS ((char *)); |
35f5886e FF |
419 | |
420 | static struct type * | |
1c92ca6f | 421 | decode_modified_type PARAMS ((char *, unsigned int, int)); |
35f5886e FF |
422 | |
423 | static struct type * | |
1ab3bf1b | 424 | decode_fund_type PARAMS ((unsigned int)); |
35f5886e FF |
425 | |
426 | static char * | |
1ab3bf1b | 427 | create_name PARAMS ((char *, struct obstack *)); |
35f5886e | 428 | |
35f5886e | 429 | static struct type * |
13b5a7ff | 430 | lookup_utype PARAMS ((DIE_REF)); |
35f5886e FF |
431 | |
432 | static struct type * | |
13b5a7ff | 433 | alloc_utype PARAMS ((DIE_REF, struct type *)); |
35f5886e FF |
434 | |
435 | static struct symbol * | |
1ab3bf1b | 436 | new_symbol PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e | 437 | |
95ff889e FF |
438 | static void |
439 | synthesize_typedef PARAMS ((struct dieinfo *, struct objfile *, | |
440 | struct type *)); | |
441 | ||
35f5886e | 442 | static int |
1ab3bf1b | 443 | locval PARAMS ((char *)); |
35f5886e FF |
444 | |
445 | static void | |
1ab3bf1b JG |
446 | record_minimal_symbol PARAMS ((char *, CORE_ADDR, enum minimal_symbol_type, |
447 | struct objfile *)); | |
35f5886e | 448 | |
95ff889e FF |
449 | static void |
450 | set_cu_language PARAMS ((struct dieinfo *)); | |
451 | ||
452 | /* | |
453 | ||
454 | LOCAL FUNCTION | |
455 | ||
456 | set_cu_language -- set local copy of language for compilation unit | |
457 | ||
458 | SYNOPSIS | |
459 | ||
460 | void | |
461 | set_cu_language (struct dieinfo *dip) | |
462 | ||
463 | DESCRIPTION | |
464 | ||
465 | Decode the language attribute for a compilation unit DIE and | |
466 | remember what the language was. We use this at various times | |
467 | when processing DIE's for a given compilation unit. | |
468 | ||
469 | RETURNS | |
470 | ||
471 | No return value. | |
472 | ||
473 | */ | |
474 | ||
475 | static void | |
476 | set_cu_language (dip) | |
477 | struct dieinfo *dip; | |
478 | { | |
479 | switch (dip -> at_language) | |
480 | { | |
481 | case LANG_C89: | |
482 | case LANG_C: | |
483 | cu_language = language_c; | |
484 | break; | |
485 | case LANG_C_PLUS_PLUS: | |
486 | cu_language = language_cplus; | |
487 | break; | |
488 | case LANG_ADA83: | |
489 | case LANG_COBOL74: | |
490 | case LANG_COBOL85: | |
491 | case LANG_FORTRAN77: | |
492 | case LANG_FORTRAN90: | |
493 | case LANG_PASCAL83: | |
494 | case LANG_MODULA2: | |
495 | default: | |
496 | cu_language = language_unknown; | |
497 | break; | |
498 | } | |
499 | } | |
500 | ||
35f5886e FF |
501 | /* |
502 | ||
503 | GLOBAL FUNCTION | |
504 | ||
505 | dwarf_build_psymtabs -- build partial symtabs from DWARF debug info | |
506 | ||
507 | SYNOPSIS | |
508 | ||
d5931d79 | 509 | void dwarf_build_psymtabs (struct objfile *objfile, |
2670f34d | 510 | struct section_offsets *section_offsets, |
d5931d79 JG |
511 | int mainline, file_ptr dbfoff, unsigned int dbfsize, |
512 | file_ptr lnoffset, unsigned int lnsize) | |
35f5886e FF |
513 | |
514 | DESCRIPTION | |
515 | ||
516 | This function is called upon to build partial symtabs from files | |
517 | containing DIE's (Dwarf Information Entries) and DWARF line numbers. | |
518 | ||
d5931d79 | 519 | It is passed a bfd* containing the DIES |
35f5886e FF |
520 | and line number information, the corresponding filename for that |
521 | file, a base address for relocating the symbols, a flag indicating | |
522 | whether or not this debugging information is from a "main symbol | |
523 | table" rather than a shared library or dynamically linked file, | |
524 | and file offset/size pairs for the DIE information and line number | |
525 | information. | |
526 | ||
527 | RETURNS | |
528 | ||
529 | No return value. | |
530 | ||
531 | */ | |
532 | ||
533 | void | |
d5931d79 JG |
534 | dwarf_build_psymtabs (objfile, section_offsets, mainline, dbfoff, dbfsize, |
535 | lnoffset, lnsize) | |
536 | struct objfile *objfile; | |
2670f34d | 537 | struct section_offsets *section_offsets; |
1ab3bf1b | 538 | int mainline; |
d5931d79 | 539 | file_ptr dbfoff; |
4090fe1c | 540 | unsigned int dbfsize; |
d5931d79 | 541 | file_ptr lnoffset; |
1ab3bf1b | 542 | unsigned int lnsize; |
35f5886e | 543 | { |
d5931d79 | 544 | bfd *abfd = objfile->obfd; |
35f5886e FF |
545 | struct cleanup *back_to; |
546 | ||
95967e73 | 547 | current_objfile = objfile; |
4090fe1c | 548 | dbsize = dbfsize; |
35f5886e FF |
549 | dbbase = xmalloc (dbsize); |
550 | dbroff = 0; | |
d5931d79 JG |
551 | if ((bfd_seek (abfd, dbfoff, L_SET) != 0) || |
552 | (bfd_read (dbbase, dbsize, 1, abfd) != dbsize)) | |
35f5886e FF |
553 | { |
554 | free (dbbase); | |
d5931d79 | 555 | error ("can't read DWARF data from '%s'", bfd_get_filename (abfd)); |
35f5886e FF |
556 | } |
557 | back_to = make_cleanup (free, dbbase); | |
558 | ||
559 | /* If we are reinitializing, or if we have never loaded syms yet, init. | |
560 | Since we have no idea how many DIES we are looking at, we just guess | |
561 | some arbitrary value. */ | |
562 | ||
13b5a7ff FF |
563 | if (mainline || objfile -> global_psymbols.size == 0 || |
564 | objfile -> static_psymbols.size == 0) | |
35f5886e | 565 | { |
1ab3bf1b | 566 | init_psymbol_list (objfile, 1024); |
35f5886e FF |
567 | } |
568 | ||
84ffdec2 | 569 | /* Save the relocation factor where everybody can see it. */ |
f8b76e70 | 570 | |
2670f34d JG |
571 | base_section_offsets = section_offsets; |
572 | baseaddr = ANOFFSET (section_offsets, 0); | |
f8b76e70 | 573 | |
35f5886e FF |
574 | /* Follow the compilation unit sibling chain, building a partial symbol |
575 | table entry for each one. Save enough information about each compilation | |
576 | unit to locate the full DWARF information later. */ | |
577 | ||
d5931d79 | 578 | scan_compilation_units (dbbase, dbbase + dbsize, dbfoff, lnoffset, objfile); |
35f5886e | 579 | |
35f5886e | 580 | do_cleanups (back_to); |
95967e73 | 581 | current_objfile = NULL; |
35f5886e FF |
582 | } |
583 | ||
584 | ||
585 | /* | |
586 | ||
587 | LOCAL FUNCTION | |
588 | ||
1ab3bf1b | 589 | record_minimal_symbol -- add entry to gdb's minimal symbol table |
35f5886e FF |
590 | |
591 | SYNOPSIS | |
592 | ||
1ab3bf1b JG |
593 | static void record_minimal_symbol (char *name, CORE_ADDR address, |
594 | enum minimal_symbol_type ms_type, | |
595 | struct objfile *objfile) | |
35f5886e FF |
596 | |
597 | DESCRIPTION | |
598 | ||
599 | Given a pointer to the name of a symbol that should be added to the | |
1ab3bf1b | 600 | minimal symbol table, and the address associated with that |
35f5886e | 601 | symbol, records this information for later use in building the |
1ab3bf1b | 602 | minimal symbol table. |
35f5886e | 603 | |
35f5886e FF |
604 | */ |
605 | ||
606 | static void | |
1ab3bf1b JG |
607 | record_minimal_symbol (name, address, ms_type, objfile) |
608 | char *name; | |
609 | CORE_ADDR address; | |
610 | enum minimal_symbol_type ms_type; | |
611 | struct objfile *objfile; | |
35f5886e | 612 | { |
1ab3bf1b JG |
613 | name = obsavestring (name, strlen (name), &objfile -> symbol_obstack); |
614 | prim_record_minimal_symbol (name, address, ms_type); | |
35f5886e FF |
615 | } |
616 | ||
617 | /* | |
618 | ||
619 | LOCAL FUNCTION | |
620 | ||
621 | dwarfwarn -- issue a DWARF related warning | |
622 | ||
623 | DESCRIPTION | |
624 | ||
625 | Issue warnings about DWARF related things that aren't serious enough | |
626 | to warrant aborting with an error, but should not be ignored either. | |
627 | This includes things like detectable corruption in DIE's, missing | |
628 | DIE's, unimplemented features, etc. | |
629 | ||
630 | In general, running across tags or attributes that we don't recognize | |
631 | is not considered to be a problem and we should not issue warnings | |
632 | about such. | |
633 | ||
634 | NOTES | |
635 | ||
636 | We mostly follow the example of the error() routine, but without | |
637 | returning to command level. It is arguable about whether warnings | |
638 | should be issued at all, and if so, where they should go (stdout or | |
639 | stderr). | |
640 | ||
641 | We assume that curdie is valid and contains at least the basic | |
642 | information for the DIE where the problem was noticed. | |
643 | */ | |
644 | ||
645 | static void | |
313fdead JG |
646 | dwarfwarn (va_alist) |
647 | va_dcl | |
35f5886e FF |
648 | { |
649 | va_list ap; | |
313fdead | 650 | char *fmt; |
35f5886e | 651 | |
313fdead JG |
652 | va_start (ap); |
653 | fmt = va_arg (ap, char *); | |
35f5886e | 654 | warning_setup (); |
13b5a7ff | 655 | fprintf (stderr, "warning: DWARF ref 0x%x: ", curdie -> die_ref); |
35f5886e FF |
656 | if (curdie -> at_name) |
657 | { | |
658 | fprintf (stderr, "'%s': ", curdie -> at_name); | |
659 | } | |
660 | vfprintf (stderr, fmt, ap); | |
661 | fprintf (stderr, "\n"); | |
662 | fflush (stderr); | |
663 | va_end (ap); | |
664 | } | |
4d315a07 | 665 | |
35f5886e FF |
666 | /* |
667 | ||
668 | LOCAL FUNCTION | |
669 | ||
670 | read_lexical_block_scope -- process all dies in a lexical block | |
671 | ||
672 | SYNOPSIS | |
673 | ||
674 | static void read_lexical_block_scope (struct dieinfo *dip, | |
675 | char *thisdie, char *enddie) | |
676 | ||
677 | DESCRIPTION | |
678 | ||
679 | Process all the DIES contained within a lexical block scope. | |
680 | Start a new scope, process the dies, and then close the scope. | |
681 | ||
682 | */ | |
683 | ||
684 | static void | |
1ab3bf1b JG |
685 | read_lexical_block_scope (dip, thisdie, enddie, objfile) |
686 | struct dieinfo *dip; | |
687 | char *thisdie; | |
688 | char *enddie; | |
689 | struct objfile *objfile; | |
35f5886e | 690 | { |
4d315a07 FF |
691 | register struct context_stack *new; |
692 | ||
4ed3a9ea | 693 | push_context (0, dip -> at_low_pc); |
13b5a7ff | 694 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 FF |
695 | new = pop_context (); |
696 | if (local_symbols != NULL) | |
697 | { | |
698 | finish_block (0, &local_symbols, new -> old_blocks, new -> start_addr, | |
1ab3bf1b | 699 | dip -> at_high_pc, objfile); |
4d315a07 FF |
700 | } |
701 | local_symbols = new -> locals; | |
35f5886e FF |
702 | } |
703 | ||
704 | /* | |
705 | ||
706 | LOCAL FUNCTION | |
707 | ||
708 | lookup_utype -- look up a user defined type from die reference | |
709 | ||
710 | SYNOPSIS | |
711 | ||
13b5a7ff | 712 | static type *lookup_utype (DIE_REF die_ref) |
35f5886e FF |
713 | |
714 | DESCRIPTION | |
715 | ||
716 | Given a DIE reference, lookup the user defined type associated with | |
717 | that DIE, if it has been registered already. If not registered, then | |
718 | return NULL. Alloc_utype() can be called to register an empty | |
719 | type for this reference, which will be filled in later when the | |
720 | actual referenced DIE is processed. | |
721 | */ | |
722 | ||
723 | static struct type * | |
13b5a7ff FF |
724 | lookup_utype (die_ref) |
725 | DIE_REF die_ref; | |
35f5886e FF |
726 | { |
727 | struct type *type = NULL; | |
728 | int utypeidx; | |
729 | ||
13b5a7ff | 730 | utypeidx = (die_ref - dbroff) / 4; |
35f5886e FF |
731 | if ((utypeidx < 0) || (utypeidx >= numutypes)) |
732 | { | |
13b5a7ff | 733 | dwarfwarn ("reference to DIE (0x%x) outside compilation unit", die_ref); |
35f5886e FF |
734 | } |
735 | else | |
736 | { | |
737 | type = *(utypes + utypeidx); | |
738 | } | |
739 | return (type); | |
740 | } | |
741 | ||
742 | ||
743 | /* | |
744 | ||
745 | LOCAL FUNCTION | |
746 | ||
747 | alloc_utype -- add a user defined type for die reference | |
748 | ||
749 | SYNOPSIS | |
750 | ||
13b5a7ff | 751 | static type *alloc_utype (DIE_REF die_ref, struct type *utypep) |
35f5886e FF |
752 | |
753 | DESCRIPTION | |
754 | ||
13b5a7ff | 755 | Given a die reference DIE_REF, and a possible pointer to a user |
35f5886e FF |
756 | defined type UTYPEP, register that this reference has a user |
757 | defined type and either use the specified type in UTYPEP or | |
758 | make a new empty type that will be filled in later. | |
759 | ||
760 | We should only be called after calling lookup_utype() to verify that | |
13b5a7ff | 761 | there is not currently a type registered for DIE_REF. |
35f5886e FF |
762 | */ |
763 | ||
764 | static struct type * | |
13b5a7ff FF |
765 | alloc_utype (die_ref, utypep) |
766 | DIE_REF die_ref; | |
1ab3bf1b | 767 | struct type *utypep; |
35f5886e FF |
768 | { |
769 | struct type **typep; | |
770 | int utypeidx; | |
771 | ||
13b5a7ff | 772 | utypeidx = (die_ref - dbroff) / 4; |
35f5886e FF |
773 | typep = utypes + utypeidx; |
774 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
775 | { | |
1ab3bf1b | 776 | utypep = lookup_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff | 777 | dwarfwarn ("reference to DIE (0x%x) outside compilation unit", die_ref); |
35f5886e FF |
778 | } |
779 | else if (*typep != NULL) | |
780 | { | |
781 | utypep = *typep; | |
782 | SQUAWK (("internal error: dup user type allocation")); | |
783 | } | |
784 | else | |
785 | { | |
786 | if (utypep == NULL) | |
787 | { | |
8050a57b | 788 | utypep = alloc_type (current_objfile); |
35f5886e FF |
789 | } |
790 | *typep = utypep; | |
791 | } | |
792 | return (utypep); | |
793 | } | |
794 | ||
795 | /* | |
796 | ||
797 | LOCAL FUNCTION | |
798 | ||
799 | decode_die_type -- return a type for a specified die | |
800 | ||
801 | SYNOPSIS | |
802 | ||
803 | static struct type *decode_die_type (struct dieinfo *dip) | |
804 | ||
805 | DESCRIPTION | |
806 | ||
807 | Given a pointer to a die information structure DIP, decode the | |
808 | type of the die and return a pointer to the decoded type. All | |
809 | dies without specific types default to type int. | |
810 | */ | |
811 | ||
812 | static struct type * | |
1ab3bf1b JG |
813 | decode_die_type (dip) |
814 | struct dieinfo *dip; | |
35f5886e FF |
815 | { |
816 | struct type *type = NULL; | |
817 | ||
818 | if (dip -> at_fund_type != 0) | |
819 | { | |
820 | type = decode_fund_type (dip -> at_fund_type); | |
821 | } | |
822 | else if (dip -> at_mod_fund_type != NULL) | |
823 | { | |
824 | type = decode_mod_fund_type (dip -> at_mod_fund_type); | |
825 | } | |
826 | else if (dip -> at_user_def_type) | |
827 | { | |
828 | if ((type = lookup_utype (dip -> at_user_def_type)) == NULL) | |
829 | { | |
830 | type = alloc_utype (dip -> at_user_def_type, NULL); | |
831 | } | |
832 | } | |
833 | else if (dip -> at_mod_u_d_type) | |
834 | { | |
835 | type = decode_mod_u_d_type (dip -> at_mod_u_d_type); | |
836 | } | |
837 | else | |
838 | { | |
1ab3bf1b | 839 | type = lookup_fundamental_type (current_objfile, FT_INTEGER); |
35f5886e FF |
840 | } |
841 | return (type); | |
842 | } | |
843 | ||
844 | /* | |
845 | ||
846 | LOCAL FUNCTION | |
847 | ||
848 | struct_type -- compute and return the type for a struct or union | |
849 | ||
850 | SYNOPSIS | |
851 | ||
852 | static struct type *struct_type (struct dieinfo *dip, char *thisdie, | |
8b5b6fae | 853 | char *enddie, struct objfile *objfile) |
35f5886e FF |
854 | |
855 | DESCRIPTION | |
856 | ||
857 | Given pointer to a die information structure for a die which | |
715cafcb FF |
858 | defines a union or structure (and MUST define one or the other), |
859 | and pointers to the raw die data that define the range of dies which | |
860 | define the members, compute and return the user defined type for the | |
861 | structure or union. | |
35f5886e FF |
862 | */ |
863 | ||
864 | static struct type * | |
1ab3bf1b JG |
865 | struct_type (dip, thisdie, enddie, objfile) |
866 | struct dieinfo *dip; | |
867 | char *thisdie; | |
868 | char *enddie; | |
869 | struct objfile *objfile; | |
35f5886e FF |
870 | { |
871 | struct type *type; | |
872 | struct nextfield { | |
873 | struct nextfield *next; | |
874 | struct field field; | |
875 | }; | |
876 | struct nextfield *list = NULL; | |
877 | struct nextfield *new; | |
878 | int nfields = 0; | |
879 | int n; | |
880 | char *tpart1; | |
35f5886e | 881 | struct dieinfo mbr; |
8b5b6fae | 882 | char *nextdie; |
50055e94 | 883 | int anonymous_size; |
35f5886e | 884 | |
13b5a7ff | 885 | if ((type = lookup_utype (dip -> die_ref)) == NULL) |
35f5886e | 886 | { |
5edf98d7 | 887 | /* No forward references created an empty type, so install one now */ |
13b5a7ff | 888 | type = alloc_utype (dip -> die_ref, NULL); |
35f5886e | 889 | } |
a3723a43 | 890 | INIT_CPLUS_SPECIFIC(type); |
13b5a7ff | 891 | switch (dip -> die_tag) |
35f5886e | 892 | { |
95ff889e FF |
893 | case TAG_class_type: |
894 | TYPE_CODE (type) = TYPE_CODE_CLASS; | |
895 | tpart1 = "class"; | |
896 | break; | |
715cafcb | 897 | case TAG_structure_type: |
5edf98d7 | 898 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
715cafcb FF |
899 | tpart1 = "struct"; |
900 | break; | |
901 | case TAG_union_type: | |
902 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
903 | tpart1 = "union"; | |
904 | break; | |
905 | default: | |
906 | /* Should never happen */ | |
907 | TYPE_CODE (type) = TYPE_CODE_UNDEF; | |
908 | tpart1 = "???"; | |
95ff889e | 909 | SQUAWK (("missing class, structure, or union tag")); |
715cafcb | 910 | break; |
35f5886e | 911 | } |
5edf98d7 FF |
912 | /* Some compilers try to be helpful by inventing "fake" names for |
913 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
914 | Thanks, but no thanks... */ | |
715cafcb FF |
915 | if (dip -> at_name != NULL |
916 | && *dip -> at_name != '~' | |
917 | && *dip -> at_name != '.') | |
35f5886e | 918 | { |
95967e73 | 919 | TYPE_NAME (type) = obconcat (&objfile -> type_obstack, |
1ab3bf1b | 920 | tpart1, " ", dip -> at_name); |
35f5886e | 921 | } |
50055e94 FF |
922 | /* Use whatever size is known. Zero is a valid size. We might however |
923 | wish to check has_at_byte_size to make sure that some byte size was | |
924 | given explicitly, but DWARF doesn't specify that explicit sizes of | |
925 | zero have to present, so complaining about missing sizes should | |
926 | probably not be the default. */ | |
927 | TYPE_LENGTH (type) = dip -> at_byte_size; | |
13b5a7ff | 928 | thisdie += dip -> die_length; |
35f5886e FF |
929 | while (thisdie < enddie) |
930 | { | |
95967e73 FF |
931 | basicdieinfo (&mbr, thisdie, objfile); |
932 | completedieinfo (&mbr, objfile); | |
13b5a7ff | 933 | if (mbr.die_length <= SIZEOF_DIE_LENGTH) |
35f5886e FF |
934 | { |
935 | break; | |
936 | } | |
8b5b6fae FF |
937 | else if (mbr.at_sibling != 0) |
938 | { | |
939 | nextdie = dbbase + mbr.at_sibling - dbroff; | |
940 | } | |
941 | else | |
942 | { | |
13b5a7ff | 943 | nextdie = thisdie + mbr.die_length; |
8b5b6fae | 944 | } |
13b5a7ff | 945 | switch (mbr.die_tag) |
35f5886e FF |
946 | { |
947 | case TAG_member: | |
948 | /* Get space to record the next field's data. */ | |
949 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
950 | new -> next = list; | |
951 | list = new; | |
952 | /* Save the data. */ | |
50e0dc41 FF |
953 | list -> field.name = |
954 | obsavestring (mbr.at_name, strlen (mbr.at_name), | |
955 | &objfile -> type_obstack); | |
35f5886e FF |
956 | list -> field.type = decode_die_type (&mbr); |
957 | list -> field.bitpos = 8 * locval (mbr.at_location); | |
4db8e515 FF |
958 | /* Handle bit fields. */ |
959 | list -> field.bitsize = mbr.at_bit_size; | |
960 | #if BITS_BIG_ENDIAN | |
961 | /* For big endian bits, the at_bit_offset gives the additional | |
962 | bit offset from the MSB of the containing anonymous object to | |
963 | the MSB of the field. We don't have to do anything special | |
964 | since we don't need to know the size of the anonymous object. */ | |
965 | list -> field.bitpos += mbr.at_bit_offset; | |
966 | #else | |
967 | /* For little endian bits, we need to have a non-zero at_bit_size, | |
968 | so that we know we are in fact dealing with a bitfield. Compute | |
969 | the bit offset to the MSB of the anonymous object, subtract off | |
970 | the number of bits from the MSB of the field to the MSB of the | |
971 | object, and then subtract off the number of bits of the field | |
972 | itself. The result is the bit offset of the LSB of the field. */ | |
973 | if (mbr.at_bit_size > 0) | |
974 | { | |
50055e94 FF |
975 | if (mbr.has_at_byte_size) |
976 | { | |
977 | /* The size of the anonymous object containing the bit field | |
978 | is explicit, so use the indicated size (in bytes). */ | |
979 | anonymous_size = mbr.at_byte_size; | |
980 | } | |
981 | else | |
982 | { | |
983 | /* The size of the anonymous object containing the bit field | |
984 | matches the size of an object of the bit field's type. | |
985 | DWARF allows at_byte_size to be left out in such cases, | |
986 | as a debug information size optimization. */ | |
987 | anonymous_size = TYPE_LENGTH (list -> field.type); | |
988 | } | |
4db8e515 | 989 | list -> field.bitpos += |
50055e94 | 990 | anonymous_size * 8 - mbr.at_bit_offset - mbr.at_bit_size; |
4db8e515 FF |
991 | } |
992 | #endif | |
35f5886e FF |
993 | nfields++; |
994 | break; | |
995 | default: | |
8b5b6fae | 996 | process_dies (thisdie, nextdie, objfile); |
35f5886e FF |
997 | break; |
998 | } | |
8b5b6fae | 999 | thisdie = nextdie; |
35f5886e | 1000 | } |
5edf98d7 FF |
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) | |
35f5886e | 1007 | { |
5edf98d7 FF |
1008 | TYPE_FLAGS (type) |= TYPE_FLAG_STUB; |
1009 | } | |
1010 | else | |
1011 | { | |
1012 | TYPE_NFIELDS (type) = nfields; | |
1013 | TYPE_FIELDS (type) = (struct field *) | |
dac9734e | 1014 | TYPE_ALLOC (type, sizeof (struct field) * nfields); |
5edf98d7 FF |
1015 | /* Copy the saved-up fields into the field vector. */ |
1016 | for (n = nfields; list; list = list -> next) | |
1017 | { | |
1018 | TYPE_FIELD (type, --n) = list -> field; | |
1019 | } | |
1020 | } | |
35f5886e FF |
1021 | return (type); |
1022 | } | |
1023 | ||
1024 | /* | |
1025 | ||
1026 | LOCAL FUNCTION | |
1027 | ||
1028 | read_structure_scope -- process all dies within struct or union | |
1029 | ||
1030 | SYNOPSIS | |
1031 | ||
1032 | static void read_structure_scope (struct dieinfo *dip, | |
8b5b6fae | 1033 | char *thisdie, char *enddie, struct objfile *objfile) |
35f5886e FF |
1034 | |
1035 | DESCRIPTION | |
1036 | ||
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. | |
1041 | ||
1042 | NOTES | |
1043 | ||
1044 | Note that we need to call struct_type regardless of whether or not | |
84ce6717 FF |
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). | |
1055 | ||
35f5886e FF |
1056 | */ |
1057 | ||
1058 | static void | |
1ab3bf1b JG |
1059 | read_structure_scope (dip, thisdie, enddie, objfile) |
1060 | struct dieinfo *dip; | |
1061 | char *thisdie; | |
1062 | char *enddie; | |
1063 | struct objfile *objfile; | |
35f5886e FF |
1064 | { |
1065 | struct type *type; | |
1066 | struct symbol *sym; | |
1067 | ||
8b5b6fae | 1068 | type = struct_type (dip, thisdie, enddie, objfile); |
84ce6717 | 1069 | if (!(TYPE_FLAGS (type) & TYPE_FLAG_STUB)) |
35f5886e | 1070 | { |
95ff889e FF |
1071 | sym = new_symbol (dip, objfile); |
1072 | if (sym != NULL) | |
84ce6717 FF |
1073 | { |
1074 | SYMBOL_TYPE (sym) = type; | |
95ff889e FF |
1075 | if (cu_language == language_cplus) |
1076 | { | |
1077 | synthesize_typedef (dip, objfile, type); | |
1078 | } | |
84ce6717 | 1079 | } |
35f5886e FF |
1080 | } |
1081 | } | |
1082 | ||
1083 | /* | |
1084 | ||
1085 | LOCAL FUNCTION | |
1086 | ||
1087 | decode_array_element_type -- decode type of the array elements | |
1088 | ||
1089 | SYNOPSIS | |
1090 | ||
1091 | static struct type *decode_array_element_type (char *scan, char *end) | |
1092 | ||
1093 | DESCRIPTION | |
1094 | ||
1095 | As the last step in decoding the array subscript information for an | |
1096 | array DIE, we need to decode the type of the array elements. We are | |
1097 | passed a pointer to this last part of the subscript information and | |
1098 | must return the appropriate type. If the type attribute is not | |
1099 | recognized, just warn about the problem and return type int. | |
1100 | */ | |
1101 | ||
1102 | static struct type * | |
84ffdec2 | 1103 | decode_array_element_type (scan) |
1ab3bf1b | 1104 | char *scan; |
35f5886e FF |
1105 | { |
1106 | struct type *typep; | |
13b5a7ff FF |
1107 | DIE_REF die_ref; |
1108 | unsigned short attribute; | |
35f5886e | 1109 | unsigned short fundtype; |
13b5a7ff | 1110 | int nbytes; |
35f5886e | 1111 | |
13b5a7ff FF |
1112 | attribute = target_to_host (scan, SIZEOF_ATTRIBUTE, GET_UNSIGNED, |
1113 | current_objfile); | |
1114 | scan += SIZEOF_ATTRIBUTE; | |
1115 | if ((nbytes = attribute_size (attribute)) == -1) | |
1116 | { | |
35f5886e | 1117 | SQUAWK (("bad array element type attribute 0x%x", attribute)); |
1ab3bf1b | 1118 | typep = lookup_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff FF |
1119 | } |
1120 | else | |
1121 | { | |
1122 | switch (attribute) | |
1123 | { | |
1124 | case AT_fund_type: | |
1125 | fundtype = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1126 | current_objfile); | |
1127 | typep = decode_fund_type (fundtype); | |
1128 | break; | |
1129 | case AT_mod_fund_type: | |
1130 | typep = decode_mod_fund_type (scan); | |
1131 | break; | |
1132 | case AT_user_def_type: | |
1133 | die_ref = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1134 | current_objfile); | |
1135 | if ((typep = lookup_utype (die_ref)) == NULL) | |
1136 | { | |
1137 | typep = alloc_utype (die_ref, NULL); | |
1138 | } | |
1139 | break; | |
1140 | case AT_mod_u_d_type: | |
1141 | typep = decode_mod_u_d_type (scan); | |
1142 | break; | |
1143 | default: | |
1144 | SQUAWK (("bad array element type attribute 0x%x", attribute)); | |
1145 | typep = lookup_fundamental_type (current_objfile, FT_INTEGER); | |
1146 | break; | |
1147 | } | |
35f5886e FF |
1148 | } |
1149 | return (typep); | |
1150 | } | |
1151 | ||
1152 | /* | |
1153 | ||
1154 | LOCAL FUNCTION | |
1155 | ||
1156 | decode_subscr_data -- decode array subscript and element type data | |
1157 | ||
1158 | SYNOPSIS | |
1159 | ||
1160 | static struct type *decode_subscr_data (char *scan, char *end) | |
1161 | ||
1162 | DESCRIPTION | |
1163 | ||
1164 | The array subscripts and the data type of the elements of an | |
1165 | array are described by a list of data items, stored as a block | |
1166 | of contiguous bytes. There is a data item describing each array | |
1167 | dimension, and a final data item describing the element type. | |
1168 | The data items are ordered the same as their appearance in the | |
1169 | source (I.E. leftmost dimension first, next to leftmost second, | |
1170 | etc). | |
1171 | ||
1172 | We are passed a pointer to the start of the block of bytes | |
1173 | containing the data items, and a pointer to the first byte past | |
1174 | the data. This function decodes the data and returns a type. | |
1175 | ||
1176 | BUGS | |
1177 | FIXME: This code only implements the forms currently used | |
1178 | by the AT&T and GNU C compilers. | |
1179 | ||
1180 | The end pointer is supplied for error checking, maybe we should | |
1181 | use it for that... | |
1182 | */ | |
1183 | ||
1184 | static struct type * | |
1ab3bf1b JG |
1185 | decode_subscr_data (scan, end) |
1186 | char *scan; | |
1187 | char *end; | |
35f5886e FF |
1188 | { |
1189 | struct type *typep = NULL; | |
1190 | struct type *nexttype; | |
13b5a7ff FF |
1191 | unsigned int format; |
1192 | unsigned short fundtype; | |
1193 | unsigned long lowbound; | |
1194 | unsigned long highbound; | |
1195 | int nbytes; | |
35f5886e | 1196 | |
13b5a7ff FF |
1197 | format = target_to_host (scan, SIZEOF_FORMAT_SPECIFIER, GET_UNSIGNED, |
1198 | current_objfile); | |
1199 | scan += SIZEOF_FORMAT_SPECIFIER; | |
35f5886e FF |
1200 | switch (format) |
1201 | { | |
1202 | case FMT_ET: | |
84ffdec2 | 1203 | typep = decode_array_element_type (scan); |
35f5886e FF |
1204 | break; |
1205 | case FMT_FT_C_C: | |
13b5a7ff FF |
1206 | fundtype = target_to_host (scan, SIZEOF_FMT_FT, GET_UNSIGNED, |
1207 | current_objfile); | |
1208 | scan += SIZEOF_FMT_FT; | |
35f5886e FF |
1209 | if (fundtype != FT_integer && fundtype != FT_signed_integer |
1210 | && fundtype != FT_unsigned_integer) | |
1211 | { | |
1212 | SQUAWK (("array subscripts must be integral types, not type 0x%x", | |
13b5a7ff | 1213 | fundtype)); |
35f5886e FF |
1214 | } |
1215 | else | |
1216 | { | |
13b5a7ff FF |
1217 | nbytes = TARGET_FT_LONG_SIZE (current_objfile); |
1218 | lowbound = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1219 | current_objfile); | |
1220 | scan += nbytes; | |
1221 | highbound = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1222 | current_objfile); | |
1223 | scan += nbytes; | |
35f5886e FF |
1224 | nexttype = decode_subscr_data (scan, end); |
1225 | if (nexttype != NULL) | |
1226 | { | |
8050a57b | 1227 | typep = alloc_type (current_objfile); |
35f5886e FF |
1228 | TYPE_CODE (typep) = TYPE_CODE_ARRAY; |
1229 | TYPE_LENGTH (typep) = TYPE_LENGTH (nexttype); | |
6c316cfd | 1230 | TYPE_LENGTH (typep) *= (highbound - lowbound) + 1; |
35f5886e FF |
1231 | TYPE_TARGET_TYPE (typep) = nexttype; |
1232 | } | |
1233 | } | |
1234 | break; | |
1235 | case FMT_FT_C_X: | |
1236 | case FMT_FT_X_C: | |
1237 | case FMT_FT_X_X: | |
1238 | case FMT_UT_C_C: | |
1239 | case FMT_UT_C_X: | |
1240 | case FMT_UT_X_C: | |
1241 | case FMT_UT_X_X: | |
1242 | SQUAWK (("array subscript format 0x%x not handled yet", format)); | |
1243 | break; | |
1244 | default: | |
1245 | SQUAWK (("unknown array subscript format %x", format)); | |
1246 | break; | |
1247 | } | |
1248 | return (typep); | |
1249 | } | |
1250 | ||
1251 | /* | |
1252 | ||
1253 | LOCAL FUNCTION | |
1254 | ||
4d315a07 | 1255 | dwarf_read_array_type -- read TAG_array_type DIE |
35f5886e FF |
1256 | |
1257 | SYNOPSIS | |
1258 | ||
4d315a07 | 1259 | static void dwarf_read_array_type (struct dieinfo *dip) |
35f5886e FF |
1260 | |
1261 | DESCRIPTION | |
1262 | ||
1263 | Extract all information from a TAG_array_type DIE and add to | |
1264 | the user defined type vector. | |
1265 | */ | |
1266 | ||
1267 | static void | |
1ab3bf1b JG |
1268 | dwarf_read_array_type (dip) |
1269 | struct dieinfo *dip; | |
35f5886e FF |
1270 | { |
1271 | struct type *type; | |
af213624 | 1272 | struct type *utype; |
35f5886e FF |
1273 | char *sub; |
1274 | char *subend; | |
13b5a7ff FF |
1275 | unsigned short blocksz; |
1276 | int nbytes; | |
35f5886e FF |
1277 | |
1278 | if (dip -> at_ordering != ORD_row_major) | |
1279 | { | |
1280 | /* FIXME: Can gdb even handle column major arrays? */ | |
1281 | SQUAWK (("array not row major; not handled correctly")); | |
1282 | } | |
1283 | if ((sub = dip -> at_subscr_data) != NULL) | |
1284 | { | |
13b5a7ff FF |
1285 | nbytes = attribute_size (AT_subscr_data); |
1286 | blocksz = target_to_host (sub, nbytes, GET_UNSIGNED, current_objfile); | |
1287 | subend = sub + nbytes + blocksz; | |
1288 | sub += nbytes; | |
35f5886e FF |
1289 | type = decode_subscr_data (sub, subend); |
1290 | if (type == NULL) | |
1291 | { | |
13b5a7ff | 1292 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) |
af213624 | 1293 | { |
13b5a7ff | 1294 | utype = alloc_utype (dip -> die_ref, NULL); |
af213624 FF |
1295 | } |
1296 | TYPE_CODE (utype) = TYPE_CODE_ARRAY; | |
1ab3bf1b JG |
1297 | TYPE_TARGET_TYPE (utype) = |
1298 | lookup_fundamental_type (current_objfile, FT_INTEGER); | |
af213624 | 1299 | TYPE_LENGTH (utype) = 1 * TYPE_LENGTH (TYPE_TARGET_TYPE (utype)); |
35f5886e FF |
1300 | } |
1301 | else | |
1302 | { | |
13b5a7ff | 1303 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) |
af213624 | 1304 | { |
4ed3a9ea | 1305 | alloc_utype (dip -> die_ref, type); |
af213624 FF |
1306 | } |
1307 | else | |
1308 | { | |
1309 | TYPE_CODE (utype) = TYPE_CODE_ARRAY; | |
1310 | TYPE_LENGTH (utype) = TYPE_LENGTH (type); | |
1311 | TYPE_TARGET_TYPE (utype) = TYPE_TARGET_TYPE (type); | |
1312 | } | |
35f5886e FF |
1313 | } |
1314 | } | |
1315 | } | |
1316 | ||
1317 | /* | |
1318 | ||
9e4c1921 FF |
1319 | LOCAL FUNCTION |
1320 | ||
1321 | read_tag_pointer_type -- read TAG_pointer_type DIE | |
1322 | ||
1323 | SYNOPSIS | |
1324 | ||
1325 | static void read_tag_pointer_type (struct dieinfo *dip) | |
1326 | ||
1327 | DESCRIPTION | |
1328 | ||
1329 | Extract all information from a TAG_pointer_type DIE and add to | |
1330 | the user defined type vector. | |
1331 | */ | |
1332 | ||
1333 | static void | |
1ab3bf1b JG |
1334 | read_tag_pointer_type (dip) |
1335 | struct dieinfo *dip; | |
9e4c1921 FF |
1336 | { |
1337 | struct type *type; | |
1338 | struct type *utype; | |
9e4c1921 FF |
1339 | |
1340 | type = decode_die_type (dip); | |
13b5a7ff | 1341 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) |
9e4c1921 FF |
1342 | { |
1343 | utype = lookup_pointer_type (type); | |
4ed3a9ea | 1344 | alloc_utype (dip -> die_ref, utype); |
9e4c1921 FF |
1345 | } |
1346 | else | |
1347 | { | |
1348 | TYPE_TARGET_TYPE (utype) = type; | |
1349 | TYPE_POINTER_TYPE (type) = utype; | |
1350 | ||
1351 | /* We assume the machine has only one representation for pointers! */ | |
1352 | /* FIXME: This confuses host<->target data representations, and is a | |
1353 | poor assumption besides. */ | |
1354 | ||
1355 | TYPE_LENGTH (utype) = sizeof (char *); | |
1356 | TYPE_CODE (utype) = TYPE_CODE_PTR; | |
1357 | } | |
1358 | } | |
1359 | ||
1360 | /* | |
1361 | ||
35f5886e FF |
1362 | LOCAL FUNCTION |
1363 | ||
1364 | read_subroutine_type -- process TAG_subroutine_type dies | |
1365 | ||
1366 | SYNOPSIS | |
1367 | ||
1368 | static void read_subroutine_type (struct dieinfo *dip, char thisdie, | |
1369 | char *enddie) | |
1370 | ||
1371 | DESCRIPTION | |
1372 | ||
1373 | Handle DIES due to C code like: | |
1374 | ||
1375 | struct foo { | |
1376 | int (*funcp)(int a, long l); (Generates TAG_subroutine_type DIE) | |
1377 | int b; | |
1378 | }; | |
1379 | ||
1380 | NOTES | |
1381 | ||
1382 | The parameter DIES are currently ignored. See if gdb has a way to | |
1383 | include this info in it's type system, and decode them if so. Is | |
1384 | this what the type structure's "arg_types" field is for? (FIXME) | |
1385 | */ | |
1386 | ||
1387 | static void | |
1ab3bf1b JG |
1388 | read_subroutine_type (dip, thisdie, enddie) |
1389 | struct dieinfo *dip; | |
1390 | char *thisdie; | |
1391 | char *enddie; | |
35f5886e | 1392 | { |
af213624 FF |
1393 | struct type *type; /* Type that this function returns */ |
1394 | struct type *ftype; /* Function that returns above type */ | |
35f5886e | 1395 | |
af213624 FF |
1396 | /* Decode the type that this subroutine returns */ |
1397 | ||
35f5886e | 1398 | type = decode_die_type (dip); |
af213624 FF |
1399 | |
1400 | /* Check to see if we already have a partially constructed user | |
1401 | defined type for this DIE, from a forward reference. */ | |
1402 | ||
13b5a7ff | 1403 | if ((ftype = lookup_utype (dip -> die_ref)) == NULL) |
af213624 FF |
1404 | { |
1405 | /* This is the first reference to one of these types. Make | |
1406 | a new one and place it in the user defined types. */ | |
1407 | ftype = lookup_function_type (type); | |
4ed3a9ea | 1408 | alloc_utype (dip -> die_ref, ftype); |
af213624 FF |
1409 | } |
1410 | else | |
1411 | { | |
1412 | /* We have an existing partially constructed type, so bash it | |
1413 | into the correct type. */ | |
1414 | TYPE_TARGET_TYPE (ftype) = type; | |
1415 | TYPE_FUNCTION_TYPE (type) = ftype; | |
1416 | TYPE_LENGTH (ftype) = 1; | |
1417 | TYPE_CODE (ftype) = TYPE_CODE_FUNC; | |
1418 | } | |
35f5886e FF |
1419 | } |
1420 | ||
1421 | /* | |
1422 | ||
1423 | LOCAL FUNCTION | |
1424 | ||
1425 | read_enumeration -- process dies which define an enumeration | |
1426 | ||
1427 | SYNOPSIS | |
1428 | ||
1429 | static void read_enumeration (struct dieinfo *dip, char *thisdie, | |
1ab3bf1b | 1430 | char *enddie, struct objfile *objfile) |
35f5886e FF |
1431 | |
1432 | DESCRIPTION | |
1433 | ||
1434 | Given a pointer to a die which begins an enumeration, process all | |
1435 | the dies that define the members of the enumeration. | |
1436 | ||
1437 | NOTES | |
1438 | ||
1439 | Note that we need to call enum_type regardless of whether or not we | |
1440 | have a symbol, since we might have an enum without a tag name (thus | |
1441 | no symbol for the tagname). | |
1442 | */ | |
1443 | ||
1444 | static void | |
1ab3bf1b JG |
1445 | read_enumeration (dip, thisdie, enddie, objfile) |
1446 | struct dieinfo *dip; | |
1447 | char *thisdie; | |
1448 | char *enddie; | |
1449 | struct objfile *objfile; | |
35f5886e FF |
1450 | { |
1451 | struct type *type; | |
1452 | struct symbol *sym; | |
1453 | ||
1ab3bf1b | 1454 | type = enum_type (dip, objfile); |
95ff889e FF |
1455 | sym = new_symbol (dip, objfile); |
1456 | if (sym != NULL) | |
35f5886e FF |
1457 | { |
1458 | SYMBOL_TYPE (sym) = type; | |
95ff889e FF |
1459 | if (cu_language == language_cplus) |
1460 | { | |
1461 | synthesize_typedef (dip, objfile, type); | |
1462 | } | |
35f5886e FF |
1463 | } |
1464 | } | |
1465 | ||
1466 | /* | |
1467 | ||
1468 | LOCAL FUNCTION | |
1469 | ||
1470 | enum_type -- decode and return a type for an enumeration | |
1471 | ||
1472 | SYNOPSIS | |
1473 | ||
1ab3bf1b | 1474 | static type *enum_type (struct dieinfo *dip, struct objfile *objfile) |
35f5886e FF |
1475 | |
1476 | DESCRIPTION | |
1477 | ||
1478 | Given a pointer to a die information structure for the die which | |
1479 | starts an enumeration, process all the dies that define the members | |
1480 | of the enumeration and return a type pointer for the enumeration. | |
98618bf7 | 1481 | |
715cafcb FF |
1482 | At the same time, for each member of the enumeration, create a |
1483 | symbol for it with namespace VAR_NAMESPACE and class LOC_CONST, | |
1484 | and give it the type of the enumeration itself. | |
1485 | ||
1486 | NOTES | |
1487 | ||
98618bf7 FF |
1488 | Note that the DWARF specification explicitly mandates that enum |
1489 | constants occur in reverse order from the source program order, | |
1490 | for "consistency" and because this ordering is easier for many | |
1ab3bf1b | 1491 | compilers to generate. (Draft 6, sec 3.8.5, Enumeration type |
715cafcb FF |
1492 | Entries). Because gdb wants to see the enum members in program |
1493 | source order, we have to ensure that the order gets reversed while | |
98618bf7 | 1494 | we are processing them. |
35f5886e FF |
1495 | */ |
1496 | ||
1497 | static struct type * | |
1ab3bf1b JG |
1498 | enum_type (dip, objfile) |
1499 | struct dieinfo *dip; | |
1500 | struct objfile *objfile; | |
35f5886e FF |
1501 | { |
1502 | struct type *type; | |
1503 | struct nextfield { | |
1504 | struct nextfield *next; | |
1505 | struct field field; | |
1506 | }; | |
1507 | struct nextfield *list = NULL; | |
1508 | struct nextfield *new; | |
1509 | int nfields = 0; | |
1510 | int n; | |
35f5886e FF |
1511 | char *scan; |
1512 | char *listend; | |
13b5a7ff | 1513 | unsigned short blocksz; |
715cafcb | 1514 | struct symbol *sym; |
13b5a7ff | 1515 | int nbytes; |
35f5886e | 1516 | |
13b5a7ff | 1517 | if ((type = lookup_utype (dip -> die_ref)) == NULL) |
35f5886e | 1518 | { |
84ce6717 | 1519 | /* No forward references created an empty type, so install one now */ |
13b5a7ff | 1520 | type = alloc_utype (dip -> die_ref, NULL); |
35f5886e FF |
1521 | } |
1522 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
84ce6717 FF |
1523 | /* Some compilers try to be helpful by inventing "fake" names for |
1524 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1525 | Thanks, but no thanks... */ | |
715cafcb FF |
1526 | if (dip -> at_name != NULL |
1527 | && *dip -> at_name != '~' | |
1528 | && *dip -> at_name != '.') | |
35f5886e | 1529 | { |
95967e73 | 1530 | TYPE_NAME (type) = obconcat (&objfile -> type_obstack, "enum", |
1ab3bf1b | 1531 | " ", dip -> at_name); |
35f5886e | 1532 | } |
715cafcb | 1533 | if (dip -> at_byte_size != 0) |
35f5886e FF |
1534 | { |
1535 | TYPE_LENGTH (type) = dip -> at_byte_size; | |
35f5886e | 1536 | } |
35f5886e FF |
1537 | if ((scan = dip -> at_element_list) != NULL) |
1538 | { | |
768be6e1 FF |
1539 | if (dip -> short_element_list) |
1540 | { | |
13b5a7ff | 1541 | nbytes = attribute_size (AT_short_element_list); |
768be6e1 FF |
1542 | } |
1543 | else | |
1544 | { | |
13b5a7ff | 1545 | nbytes = attribute_size (AT_element_list); |
768be6e1 | 1546 | } |
13b5a7ff FF |
1547 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); |
1548 | listend = scan + nbytes + blocksz; | |
1549 | scan += nbytes; | |
35f5886e FF |
1550 | while (scan < listend) |
1551 | { | |
1552 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1553 | new -> next = list; | |
1554 | list = new; | |
1555 | list -> field.type = NULL; | |
1556 | list -> field.bitsize = 0; | |
13b5a7ff FF |
1557 | list -> field.bitpos = |
1558 | target_to_host (scan, TARGET_FT_LONG_SIZE (objfile), GET_SIGNED, | |
1559 | objfile); | |
1560 | scan += TARGET_FT_LONG_SIZE (objfile); | |
50e0dc41 FF |
1561 | list -> field.name = obsavestring (scan, strlen (scan), |
1562 | &objfile -> type_obstack); | |
35f5886e FF |
1563 | scan += strlen (scan) + 1; |
1564 | nfields++; | |
715cafcb | 1565 | /* Handcraft a new symbol for this enum member. */ |
1ab3bf1b | 1566 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
715cafcb | 1567 | sizeof (struct symbol)); |
4ed3a9ea | 1568 | memset (sym, 0, sizeof (struct symbol)); |
13b5a7ff FF |
1569 | SYMBOL_NAME (sym) = create_name (list -> field.name, |
1570 | &objfile->symbol_obstack); | |
715cafcb FF |
1571 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
1572 | SYMBOL_CLASS (sym) = LOC_CONST; | |
1573 | SYMBOL_TYPE (sym) = type; | |
1574 | SYMBOL_VALUE (sym) = list -> field.bitpos; | |
4d315a07 | 1575 | add_symbol_to_list (sym, list_in_scope); |
35f5886e | 1576 | } |
84ce6717 | 1577 | /* Now create the vector of fields, and record how big it is. This is |
0efe20a6 | 1578 | where we reverse the order, by pulling the members off the list in |
84ce6717 FF |
1579 | reverse order from how they were inserted. If we have no fields |
1580 | (this is apparently possible in C++) then skip building a field | |
1581 | vector. */ | |
1582 | if (nfields > 0) | |
1583 | { | |
1584 | TYPE_NFIELDS (type) = nfields; | |
1585 | TYPE_FIELDS (type) = (struct field *) | |
1ab3bf1b | 1586 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct field) * nfields); |
84ce6717 FF |
1587 | /* Copy the saved-up fields into the field vector. */ |
1588 | for (n = 0; (n < nfields) && (list != NULL); list = list -> next) | |
1589 | { | |
1590 | TYPE_FIELD (type, n++) = list -> field; | |
1591 | } | |
1592 | } | |
35f5886e | 1593 | } |
35f5886e FF |
1594 | return (type); |
1595 | } | |
1596 | ||
1597 | /* | |
1598 | ||
1599 | LOCAL FUNCTION | |
1600 | ||
1601 | read_func_scope -- process all dies within a function scope | |
1602 | ||
35f5886e FF |
1603 | DESCRIPTION |
1604 | ||
1605 | Process all dies within a given function scope. We are passed | |
1606 | a die information structure pointer DIP for the die which | |
1607 | starts the function scope, and pointers into the raw die data | |
1608 | that define the dies within the function scope. | |
1609 | ||
1610 | For now, we ignore lexical block scopes within the function. | |
1611 | The problem is that AT&T cc does not define a DWARF lexical | |
1612 | block scope for the function itself, while gcc defines a | |
1613 | lexical block scope for the function. We need to think about | |
1614 | how to handle this difference, or if it is even a problem. | |
1615 | (FIXME) | |
1616 | */ | |
1617 | ||
1618 | static void | |
1ab3bf1b JG |
1619 | read_func_scope (dip, thisdie, enddie, objfile) |
1620 | struct dieinfo *dip; | |
1621 | char *thisdie; | |
1622 | char *enddie; | |
1623 | struct objfile *objfile; | |
35f5886e | 1624 | { |
4d315a07 | 1625 | register struct context_stack *new; |
35f5886e | 1626 | |
5e2e79f8 FF |
1627 | if (objfile -> ei.entry_point >= dip -> at_low_pc && |
1628 | objfile -> ei.entry_point < dip -> at_high_pc) | |
35f5886e | 1629 | { |
5e2e79f8 FF |
1630 | objfile -> ei.entry_func_lowpc = dip -> at_low_pc; |
1631 | objfile -> ei.entry_func_highpc = dip -> at_high_pc; | |
35f5886e | 1632 | } |
4d315a07 | 1633 | if (STREQ (dip -> at_name, "main")) /* FIXME: hardwired name */ |
35f5886e | 1634 | { |
5e2e79f8 FF |
1635 | objfile -> ei.main_func_lowpc = dip -> at_low_pc; |
1636 | objfile -> ei.main_func_highpc = dip -> at_high_pc; | |
35f5886e | 1637 | } |
4d315a07 | 1638 | new = push_context (0, dip -> at_low_pc); |
1ab3bf1b | 1639 | new -> name = new_symbol (dip, objfile); |
4d315a07 | 1640 | list_in_scope = &local_symbols; |
13b5a7ff | 1641 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 FF |
1642 | new = pop_context (); |
1643 | /* Make a block for the local symbols within. */ | |
1644 | finish_block (new -> name, &local_symbols, new -> old_blocks, | |
1ab3bf1b | 1645 | new -> start_addr, dip -> at_high_pc, objfile); |
4d315a07 | 1646 | list_in_scope = &file_symbols; |
35f5886e FF |
1647 | } |
1648 | ||
2dbde378 FF |
1649 | |
1650 | /* | |
1651 | ||
1652 | LOCAL FUNCTION | |
1653 | ||
1654 | handle_producer -- process the AT_producer attribute | |
1655 | ||
1656 | DESCRIPTION | |
1657 | ||
1658 | Perform any operations that depend on finding a particular | |
1659 | AT_producer attribute. | |
1660 | ||
1661 | */ | |
1662 | ||
1663 | static void | |
1664 | handle_producer (producer) | |
1665 | char *producer; | |
1666 | { | |
1667 | ||
1668 | /* If this compilation unit was compiled with g++ or gcc, then set the | |
1669 | processing_gcc_compilation flag. */ | |
1670 | ||
1671 | processing_gcc_compilation = | |
1672 | STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER)) | |
1673 | || STREQN (producer, GCC_PRODUCER, strlen (GCC_PRODUCER)); | |
1674 | ||
1675 | /* Select a demangling style if we can identify the producer and if | |
1676 | the current style is auto. We leave the current style alone if it | |
1677 | is not auto. We also leave the demangling style alone if we find a | |
1678 | gcc (cc1) producer, as opposed to a g++ (cc1plus) producer. */ | |
1679 | ||
d23639b2 | 1680 | #if 1 /* Works, but is experimental. -fnf */ |
3dc755fb | 1681 | if (AUTO_DEMANGLING) |
2dbde378 FF |
1682 | { |
1683 | if (STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER))) | |
1684 | { | |
1685 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); | |
1686 | } | |
1687 | else if (STREQN (producer, LCC_PRODUCER, strlen (LCC_PRODUCER))) | |
1688 | { | |
1689 | set_demangling_style (LUCID_DEMANGLING_STYLE_STRING); | |
1690 | } | |
1691 | else if (STREQN (producer, CFRONT_PRODUCER, strlen (CFRONT_PRODUCER))) | |
1692 | { | |
1693 | set_demangling_style (CFRONT_DEMANGLING_STYLE_STRING); | |
1694 | } | |
1695 | } | |
1696 | #endif | |
1697 | } | |
1698 | ||
1699 | ||
35f5886e FF |
1700 | /* |
1701 | ||
1702 | LOCAL FUNCTION | |
1703 | ||
1704 | read_file_scope -- process all dies within a file scope | |
1705 | ||
35f5886e FF |
1706 | DESCRIPTION |
1707 | ||
1708 | Process all dies within a given file scope. We are passed a | |
1709 | pointer to the die information structure for the die which | |
1710 | starts the file scope, and pointers into the raw die data which | |
1711 | mark the range of dies within the file scope. | |
1712 | ||
1713 | When the partial symbol table is built, the file offset for the line | |
1714 | number table for each compilation unit is saved in the partial symbol | |
1715 | table entry for that compilation unit. As the symbols for each | |
1716 | compilation unit are read, the line number table is read into memory | |
1717 | and the variable lnbase is set to point to it. Thus all we have to | |
1718 | do is use lnbase to access the line number table for the current | |
1719 | compilation unit. | |
1720 | */ | |
1721 | ||
1722 | static void | |
1ab3bf1b JG |
1723 | read_file_scope (dip, thisdie, enddie, objfile) |
1724 | struct dieinfo *dip; | |
1725 | char *thisdie; | |
1726 | char *enddie; | |
1727 | struct objfile *objfile; | |
35f5886e FF |
1728 | { |
1729 | struct cleanup *back_to; | |
4d315a07 | 1730 | struct symtab *symtab; |
35f5886e | 1731 | |
5e2e79f8 FF |
1732 | if (objfile -> ei.entry_point >= dip -> at_low_pc && |
1733 | objfile -> ei.entry_point < dip -> at_high_pc) | |
35f5886e | 1734 | { |
5e2e79f8 FF |
1735 | objfile -> ei.entry_file_lowpc = dip -> at_low_pc; |
1736 | objfile -> ei.entry_file_highpc = dip -> at_high_pc; | |
35f5886e | 1737 | } |
95ff889e | 1738 | set_cu_language (dip); |
4d315a07 FF |
1739 | if (dip -> at_producer != NULL) |
1740 | { | |
2dbde378 | 1741 | handle_producer (dip -> at_producer); |
4d315a07 | 1742 | } |
35f5886e FF |
1743 | numutypes = (enddie - thisdie) / 4; |
1744 | utypes = (struct type **) xmalloc (numutypes * sizeof (struct type *)); | |
1745 | back_to = make_cleanup (free, utypes); | |
4ed3a9ea | 1746 | memset (utypes, 0, numutypes * sizeof (struct type *)); |
d4902ab0 | 1747 | start_symtab (dip -> at_name, dip -> at_comp_dir, dip -> at_low_pc); |
35f5886e | 1748 | decode_line_numbers (lnbase); |
13b5a7ff | 1749 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 | 1750 | symtab = end_symtab (dip -> at_high_pc, 0, 0, objfile); |
7b5d9650 | 1751 | if (symtab != NULL) |
4d315a07 | 1752 | { |
95ff889e | 1753 | symtab -> language = cu_language; |
7b5d9650 | 1754 | } |
35f5886e FF |
1755 | do_cleanups (back_to); |
1756 | utypes = NULL; | |
1757 | numutypes = 0; | |
1758 | } | |
1759 | ||
1760 | /* | |
1761 | ||
35f5886e FF |
1762 | LOCAL FUNCTION |
1763 | ||
1764 | process_dies -- process a range of DWARF Information Entries | |
1765 | ||
1766 | SYNOPSIS | |
1767 | ||
8b5b6fae FF |
1768 | static void process_dies (char *thisdie, char *enddie, |
1769 | struct objfile *objfile) | |
35f5886e FF |
1770 | |
1771 | DESCRIPTION | |
1772 | ||
1773 | Process all DIE's in a specified range. May be (and almost | |
1774 | certainly will be) called recursively. | |
1775 | */ | |
1776 | ||
1777 | static void | |
1ab3bf1b JG |
1778 | process_dies (thisdie, enddie, objfile) |
1779 | char *thisdie; | |
1780 | char *enddie; | |
1781 | struct objfile *objfile; | |
35f5886e FF |
1782 | { |
1783 | char *nextdie; | |
1784 | struct dieinfo di; | |
1785 | ||
1786 | while (thisdie < enddie) | |
1787 | { | |
95967e73 | 1788 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 1789 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
1790 | { |
1791 | break; | |
1792 | } | |
13b5a7ff | 1793 | else if (di.die_tag == TAG_padding) |
35f5886e | 1794 | { |
13b5a7ff | 1795 | nextdie = thisdie + di.die_length; |
35f5886e FF |
1796 | } |
1797 | else | |
1798 | { | |
95967e73 | 1799 | completedieinfo (&di, objfile); |
35f5886e FF |
1800 | if (di.at_sibling != 0) |
1801 | { | |
1802 | nextdie = dbbase + di.at_sibling - dbroff; | |
1803 | } | |
1804 | else | |
1805 | { | |
13b5a7ff | 1806 | nextdie = thisdie + di.die_length; |
35f5886e | 1807 | } |
13b5a7ff | 1808 | switch (di.die_tag) |
35f5886e FF |
1809 | { |
1810 | case TAG_compile_unit: | |
a048c8f5 | 1811 | read_file_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
1812 | break; |
1813 | case TAG_global_subroutine: | |
1814 | case TAG_subroutine: | |
2d6186f4 | 1815 | if (di.has_at_low_pc) |
35f5886e | 1816 | { |
a048c8f5 | 1817 | read_func_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
1818 | } |
1819 | break; | |
1820 | case TAG_lexical_block: | |
a048c8f5 | 1821 | read_lexical_block_scope (&di, thisdie, nextdie, objfile); |
35f5886e | 1822 | break; |
95ff889e | 1823 | case TAG_class_type: |
35f5886e FF |
1824 | case TAG_structure_type: |
1825 | case TAG_union_type: | |
8b5b6fae | 1826 | read_structure_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
1827 | break; |
1828 | case TAG_enumeration_type: | |
1ab3bf1b | 1829 | read_enumeration (&di, thisdie, nextdie, objfile); |
35f5886e FF |
1830 | break; |
1831 | case TAG_subroutine_type: | |
1832 | read_subroutine_type (&di, thisdie, nextdie); | |
1833 | break; | |
1834 | case TAG_array_type: | |
4d315a07 | 1835 | dwarf_read_array_type (&di); |
35f5886e | 1836 | break; |
9e4c1921 FF |
1837 | case TAG_pointer_type: |
1838 | read_tag_pointer_type (&di); | |
1839 | break; | |
35f5886e | 1840 | default: |
4ed3a9ea | 1841 | new_symbol (&di, objfile); |
35f5886e FF |
1842 | break; |
1843 | } | |
1844 | } | |
1845 | thisdie = nextdie; | |
1846 | } | |
1847 | } | |
1848 | ||
1849 | /* | |
1850 | ||
35f5886e FF |
1851 | LOCAL FUNCTION |
1852 | ||
1853 | decode_line_numbers -- decode a line number table fragment | |
1854 | ||
1855 | SYNOPSIS | |
1856 | ||
1857 | static void decode_line_numbers (char *tblscan, char *tblend, | |
1858 | long length, long base, long line, long pc) | |
1859 | ||
1860 | DESCRIPTION | |
1861 | ||
1862 | Translate the DWARF line number information to gdb form. | |
1863 | ||
1864 | The ".line" section contains one or more line number tables, one for | |
1865 | each ".line" section from the objects that were linked. | |
1866 | ||
1867 | The AT_stmt_list attribute for each TAG_source_file entry in the | |
1868 | ".debug" section contains the offset into the ".line" section for the | |
1869 | start of the table for that file. | |
1870 | ||
1871 | The table itself has the following structure: | |
1872 | ||
1873 | <table length><base address><source statement entry> | |
1874 | 4 bytes 4 bytes 10 bytes | |
1875 | ||
1876 | The table length is the total size of the table, including the 4 bytes | |
1877 | for the length information. | |
1878 | ||
1879 | The base address is the address of the first instruction generated | |
1880 | for the source file. | |
1881 | ||
1882 | Each source statement entry has the following structure: | |
1883 | ||
1884 | <line number><statement position><address delta> | |
1885 | 4 bytes 2 bytes 4 bytes | |
1886 | ||
1887 | The line number is relative to the start of the file, starting with | |
1888 | line 1. | |
1889 | ||
1890 | The statement position either -1 (0xFFFF) or the number of characters | |
1891 | from the beginning of the line to the beginning of the statement. | |
1892 | ||
1893 | The address delta is the difference between the base address and | |
1894 | the address of the first instruction for the statement. | |
1895 | ||
1896 | Note that we must copy the bytes from the packed table to our local | |
1897 | variables before attempting to use them, to avoid alignment problems | |
1898 | on some machines, particularly RISC processors. | |
1899 | ||
1900 | BUGS | |
1901 | ||
1902 | Does gdb expect the line numbers to be sorted? They are now by | |
1903 | chance/luck, but are not required to be. (FIXME) | |
1904 | ||
1905 | The line with number 0 is unused, gdb apparently can discover the | |
1906 | span of the last line some other way. How? (FIXME) | |
1907 | */ | |
1908 | ||
1909 | static void | |
1ab3bf1b JG |
1910 | decode_line_numbers (linetable) |
1911 | char *linetable; | |
35f5886e FF |
1912 | { |
1913 | char *tblscan; | |
1914 | char *tblend; | |
13b5a7ff FF |
1915 | unsigned long length; |
1916 | unsigned long base; | |
1917 | unsigned long line; | |
1918 | unsigned long pc; | |
35f5886e FF |
1919 | |
1920 | if (linetable != NULL) | |
1921 | { | |
1922 | tblscan = tblend = linetable; | |
13b5a7ff FF |
1923 | length = target_to_host (tblscan, SIZEOF_LINETBL_LENGTH, GET_UNSIGNED, |
1924 | current_objfile); | |
1925 | tblscan += SIZEOF_LINETBL_LENGTH; | |
35f5886e | 1926 | tblend += length; |
13b5a7ff FF |
1927 | base = target_to_host (tblscan, TARGET_FT_POINTER_SIZE (objfile), |
1928 | GET_UNSIGNED, current_objfile); | |
1929 | tblscan += TARGET_FT_POINTER_SIZE (objfile); | |
35f5886e | 1930 | base += baseaddr; |
35f5886e FF |
1931 | while (tblscan < tblend) |
1932 | { | |
13b5a7ff FF |
1933 | line = target_to_host (tblscan, SIZEOF_LINETBL_LINENO, GET_UNSIGNED, |
1934 | current_objfile); | |
1935 | tblscan += SIZEOF_LINETBL_LINENO + SIZEOF_LINETBL_STMT; | |
1936 | pc = target_to_host (tblscan, SIZEOF_LINETBL_DELTA, GET_UNSIGNED, | |
1937 | current_objfile); | |
1938 | tblscan += SIZEOF_LINETBL_DELTA; | |
35f5886e | 1939 | pc += base; |
13b5a7ff | 1940 | if (line != 0) |
35f5886e | 1941 | { |
4d315a07 | 1942 | record_line (current_subfile, line, pc); |
35f5886e FF |
1943 | } |
1944 | } | |
1945 | } | |
1946 | } | |
1947 | ||
1948 | /* | |
1949 | ||
35f5886e FF |
1950 | LOCAL FUNCTION |
1951 | ||
1952 | locval -- compute the value of a location attribute | |
1953 | ||
1954 | SYNOPSIS | |
1955 | ||
1956 | static int locval (char *loc) | |
1957 | ||
1958 | DESCRIPTION | |
1959 | ||
1960 | Given pointer to a string of bytes that define a location, compute | |
1961 | the location and return the value. | |
1962 | ||
1963 | When computing values involving the current value of the frame pointer, | |
1964 | the value zero is used, which results in a value relative to the frame | |
1965 | pointer, rather than the absolute value. This is what GDB wants | |
1966 | anyway. | |
1967 | ||
1968 | When the result is a register number, the global isreg flag is set, | |
1969 | otherwise it is cleared. This is a kludge until we figure out a better | |
1970 | way to handle the problem. Gdb's design does not mesh well with the | |
1971 | DWARF notion of a location computing interpreter, which is a shame | |
1972 | because the flexibility goes unused. | |
1973 | ||
1974 | NOTES | |
1975 | ||
1976 | Note that stack[0] is unused except as a default error return. | |
1977 | Note that stack overflow is not yet handled. | |
1978 | */ | |
1979 | ||
1980 | static int | |
1ab3bf1b JG |
1981 | locval (loc) |
1982 | char *loc; | |
35f5886e FF |
1983 | { |
1984 | unsigned short nbytes; | |
13b5a7ff FF |
1985 | unsigned short locsize; |
1986 | auto long stack[64]; | |
35f5886e FF |
1987 | int stacki; |
1988 | char *end; | |
1989 | long regno; | |
13b5a7ff FF |
1990 | int loc_atom_code; |
1991 | int loc_value_size; | |
35f5886e | 1992 | |
13b5a7ff FF |
1993 | nbytes = attribute_size (AT_location); |
1994 | locsize = target_to_host (loc, nbytes, GET_UNSIGNED, current_objfile); | |
1995 | loc += nbytes; | |
1996 | end = loc + locsize; | |
35f5886e FF |
1997 | stacki = 0; |
1998 | stack[stacki] = 0; | |
1999 | isreg = 0; | |
a5bd5ba6 | 2000 | offreg = 0; |
13b5a7ff FF |
2001 | loc_value_size = TARGET_FT_LONG_SIZE (current_objfile); |
2002 | while (loc < end) | |
35f5886e | 2003 | { |
13b5a7ff FF |
2004 | loc_atom_code = target_to_host (loc, SIZEOF_LOC_ATOM_CODE, GET_UNSIGNED, |
2005 | current_objfile); | |
2006 | loc += SIZEOF_LOC_ATOM_CODE; | |
2007 | switch (loc_atom_code) | |
2008 | { | |
2009 | case 0: | |
2010 | /* error */ | |
2011 | loc = end; | |
2012 | break; | |
2013 | case OP_REG: | |
2014 | /* push register (number) */ | |
2015 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2016 | GET_UNSIGNED, current_objfile); | |
2017 | loc += loc_value_size; | |
2018 | isreg = 1; | |
2019 | break; | |
2020 | case OP_BASEREG: | |
2021 | /* push value of register (number) */ | |
2022 | /* Actually, we compute the value as if register has 0 */ | |
2023 | offreg = 1; | |
2024 | regno = target_to_host (loc, loc_value_size, GET_UNSIGNED, | |
2025 | current_objfile); | |
2026 | loc += loc_value_size; | |
2027 | if (regno == R_FP) | |
2028 | { | |
2029 | stack[++stacki] = 0; | |
2030 | } | |
2031 | else | |
2032 | { | |
2033 | stack[++stacki] = 0; | |
2034 | SQUAWK (("BASEREG %d not handled!", regno)); | |
2035 | } | |
2036 | break; | |
2037 | case OP_ADDR: | |
2038 | /* push address (relocated address) */ | |
2039 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2040 | GET_UNSIGNED, current_objfile); | |
2041 | loc += loc_value_size; | |
2042 | break; | |
2043 | case OP_CONST: | |
2044 | /* push constant (number) FIXME: signed or unsigned! */ | |
2045 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2046 | GET_SIGNED, current_objfile); | |
2047 | loc += loc_value_size; | |
2048 | break; | |
2049 | case OP_DEREF2: | |
2050 | /* pop, deref and push 2 bytes (as a long) */ | |
2051 | SQUAWK (("OP_DEREF2 address 0x%x not handled", stack[stacki])); | |
2052 | break; | |
2053 | case OP_DEREF4: /* pop, deref and push 4 bytes (as a long) */ | |
2054 | SQUAWK (("OP_DEREF4 address 0x%x not handled", stack[stacki])); | |
2055 | break; | |
2056 | case OP_ADD: /* pop top 2 items, add, push result */ | |
2057 | stack[stacki - 1] += stack[stacki]; | |
2058 | stacki--; | |
2059 | break; | |
2060 | } | |
35f5886e FF |
2061 | } |
2062 | return (stack[stacki]); | |
2063 | } | |
2064 | ||
2065 | /* | |
2066 | ||
2067 | LOCAL FUNCTION | |
2068 | ||
2069 | read_ofile_symtab -- build a full symtab entry from chunk of DIE's | |
2070 | ||
2071 | SYNOPSIS | |
2072 | ||
a048c8f5 | 2073 | static struct symtab *read_ofile_symtab (struct partial_symtab *pst) |
35f5886e FF |
2074 | |
2075 | DESCRIPTION | |
2076 | ||
1ab3bf1b JG |
2077 | When expanding a partial symbol table entry to a full symbol table |
2078 | entry, this is the function that gets called to read in the symbols | |
2079 | for the compilation unit. | |
2080 | ||
2081 | Returns a pointer to the newly constructed symtab (which is now | |
2082 | the new first one on the objfile's symtab list). | |
35f5886e FF |
2083 | */ |
2084 | ||
2085 | static struct symtab * | |
1ab3bf1b JG |
2086 | read_ofile_symtab (pst) |
2087 | struct partial_symtab *pst; | |
35f5886e FF |
2088 | { |
2089 | struct cleanup *back_to; | |
13b5a7ff | 2090 | unsigned long lnsize; |
d5931d79 | 2091 | file_ptr foffset; |
1ab3bf1b | 2092 | bfd *abfd; |
13b5a7ff | 2093 | char lnsizedata[SIZEOF_LINETBL_LENGTH]; |
1ab3bf1b JG |
2094 | |
2095 | abfd = pst -> objfile -> obfd; | |
2096 | current_objfile = pst -> objfile; | |
2097 | ||
35f5886e FF |
2098 | /* Allocate a buffer for the entire chunk of DIE's for this compilation |
2099 | unit, seek to the location in the file, and read in all the DIE's. */ | |
2100 | ||
2101 | diecount = 0; | |
4090fe1c FF |
2102 | dbsize = DBLENGTH (pst); |
2103 | dbbase = xmalloc (dbsize); | |
35f5886e FF |
2104 | dbroff = DBROFF(pst); |
2105 | foffset = DBFOFF(pst) + dbroff; | |
2670f34d JG |
2106 | base_section_offsets = pst->section_offsets; |
2107 | baseaddr = ANOFFSET (pst->section_offsets, 0); | |
d5931d79 | 2108 | if (bfd_seek (abfd, foffset, L_SET) || |
4090fe1c | 2109 | (bfd_read (dbbase, dbsize, 1, abfd) != dbsize)) |
35f5886e FF |
2110 | { |
2111 | free (dbbase); | |
2112 | error ("can't read DWARF data"); | |
2113 | } | |
2114 | back_to = make_cleanup (free, dbbase); | |
2115 | ||
2116 | /* If there is a line number table associated with this compilation unit | |
13b5a7ff FF |
2117 | then read the size of this fragment in bytes, from the fragment itself. |
2118 | Allocate a buffer for the fragment and read it in for future | |
35f5886e FF |
2119 | processing. */ |
2120 | ||
2121 | lnbase = NULL; | |
2122 | if (LNFOFF (pst)) | |
2123 | { | |
d5931d79 | 2124 | if (bfd_seek (abfd, LNFOFF (pst), L_SET) || |
13b5a7ff FF |
2125 | (bfd_read ((PTR) lnsizedata, sizeof (lnsizedata), 1, abfd) != |
2126 | sizeof (lnsizedata))) | |
35f5886e FF |
2127 | { |
2128 | error ("can't read DWARF line number table size"); | |
2129 | } | |
13b5a7ff FF |
2130 | lnsize = target_to_host (lnsizedata, SIZEOF_LINETBL_LENGTH, |
2131 | GET_UNSIGNED, pst -> objfile); | |
35f5886e | 2132 | lnbase = xmalloc (lnsize); |
d5931d79 | 2133 | if (bfd_seek (abfd, LNFOFF (pst), L_SET) || |
a048c8f5 | 2134 | (bfd_read (lnbase, lnsize, 1, abfd) != lnsize)) |
35f5886e FF |
2135 | { |
2136 | free (lnbase); | |
2137 | error ("can't read DWARF line numbers"); | |
2138 | } | |
2139 | make_cleanup (free, lnbase); | |
2140 | } | |
2141 | ||
4090fe1c | 2142 | process_dies (dbbase, dbbase + dbsize, pst -> objfile); |
35f5886e | 2143 | do_cleanups (back_to); |
1ab3bf1b JG |
2144 | current_objfile = NULL; |
2145 | return (pst -> objfile -> symtabs); | |
35f5886e FF |
2146 | } |
2147 | ||
2148 | /* | |
2149 | ||
2150 | LOCAL FUNCTION | |
2151 | ||
2152 | psymtab_to_symtab_1 -- do grunt work for building a full symtab entry | |
2153 | ||
2154 | SYNOPSIS | |
2155 | ||
a048c8f5 | 2156 | static void psymtab_to_symtab_1 (struct partial_symtab *pst) |
35f5886e FF |
2157 | |
2158 | DESCRIPTION | |
2159 | ||
2160 | Called once for each partial symbol table entry that needs to be | |
2161 | expanded into a full symbol table entry. | |
2162 | ||
2163 | */ | |
2164 | ||
2165 | static void | |
1ab3bf1b JG |
2166 | psymtab_to_symtab_1 (pst) |
2167 | struct partial_symtab *pst; | |
35f5886e FF |
2168 | { |
2169 | int i; | |
d07734e3 | 2170 | struct cleanup *old_chain; |
35f5886e | 2171 | |
1ab3bf1b | 2172 | if (pst != NULL) |
35f5886e | 2173 | { |
1ab3bf1b | 2174 | if (pst->readin) |
35f5886e | 2175 | { |
318bf84f | 2176 | warning ("psymtab for %s already read in. Shouldn't happen.", |
1ab3bf1b JG |
2177 | pst -> filename); |
2178 | } | |
2179 | else | |
2180 | { | |
2181 | /* Read in all partial symtabs on which this one is dependent */ | |
2182 | for (i = 0; i < pst -> number_of_dependencies; i++) | |
2183 | { | |
2184 | if (!pst -> dependencies[i] -> readin) | |
2185 | { | |
2186 | /* Inform about additional files that need to be read in. */ | |
2187 | if (info_verbose) | |
2188 | { | |
2189 | fputs_filtered (" ", stdout); | |
2190 | wrap_here (""); | |
2191 | fputs_filtered ("and ", stdout); | |
2192 | wrap_here (""); | |
2193 | printf_filtered ("%s...", | |
2194 | pst -> dependencies[i] -> filename); | |
2195 | wrap_here (""); | |
2196 | fflush (stdout); /* Flush output */ | |
2197 | } | |
2198 | psymtab_to_symtab_1 (pst -> dependencies[i]); | |
2199 | } | |
2200 | } | |
2201 | if (DBLENGTH (pst)) /* Otherwise it's a dummy */ | |
2202 | { | |
d07734e3 FF |
2203 | buildsym_init (); |
2204 | old_chain = make_cleanup (really_free_pendings, 0); | |
1ab3bf1b JG |
2205 | pst -> symtab = read_ofile_symtab (pst); |
2206 | if (info_verbose) | |
2207 | { | |
2208 | printf_filtered ("%d DIE's, sorting...", diecount); | |
2209 | wrap_here (""); | |
2210 | fflush (stdout); | |
2211 | } | |
2212 | sort_symtab_syms (pst -> symtab); | |
d07734e3 | 2213 | do_cleanups (old_chain); |
1ab3bf1b JG |
2214 | } |
2215 | pst -> readin = 1; | |
35f5886e | 2216 | } |
35f5886e | 2217 | } |
35f5886e FF |
2218 | } |
2219 | ||
2220 | /* | |
2221 | ||
2222 | LOCAL FUNCTION | |
2223 | ||
2224 | dwarf_psymtab_to_symtab -- build a full symtab entry from partial one | |
2225 | ||
2226 | SYNOPSIS | |
2227 | ||
2228 | static void dwarf_psymtab_to_symtab (struct partial_symtab *pst) | |
2229 | ||
2230 | DESCRIPTION | |
2231 | ||
2232 | This is the DWARF support entry point for building a full symbol | |
2233 | table entry from a partial symbol table entry. We are passed a | |
2234 | pointer to the partial symbol table entry that needs to be expanded. | |
2235 | ||
2236 | */ | |
2237 | ||
2238 | static void | |
1ab3bf1b JG |
2239 | dwarf_psymtab_to_symtab (pst) |
2240 | struct partial_symtab *pst; | |
35f5886e | 2241 | { |
7d9884b9 | 2242 | |
1ab3bf1b | 2243 | if (pst != NULL) |
35f5886e | 2244 | { |
1ab3bf1b | 2245 | if (pst -> readin) |
35f5886e | 2246 | { |
318bf84f | 2247 | warning ("psymtab for %s already read in. Shouldn't happen.", |
1ab3bf1b | 2248 | pst -> filename); |
35f5886e | 2249 | } |
1ab3bf1b | 2250 | else |
35f5886e | 2251 | { |
1ab3bf1b JG |
2252 | if (DBLENGTH (pst) || pst -> number_of_dependencies) |
2253 | { | |
2254 | /* Print the message now, before starting serious work, to avoid | |
2255 | disconcerting pauses. */ | |
2256 | if (info_verbose) | |
2257 | { | |
2258 | printf_filtered ("Reading in symbols for %s...", | |
2259 | pst -> filename); | |
2260 | fflush (stdout); | |
2261 | } | |
2262 | ||
2263 | psymtab_to_symtab_1 (pst); | |
2264 | ||
2265 | #if 0 /* FIXME: Check to see what dbxread is doing here and see if | |
2266 | we need to do an equivalent or is this something peculiar to | |
2267 | stabs/a.out format. | |
2268 | Match with global symbols. This only needs to be done once, | |
2269 | after all of the symtabs and dependencies have been read in. | |
2270 | */ | |
2271 | scan_file_globals (pst -> objfile); | |
2272 | #endif | |
2273 | ||
2274 | /* Finish up the verbose info message. */ | |
2275 | if (info_verbose) | |
2276 | { | |
2277 | printf_filtered ("done.\n"); | |
2278 | fflush (stdout); | |
2279 | } | |
2280 | } | |
35f5886e FF |
2281 | } |
2282 | } | |
2283 | } | |
2284 | ||
2285 | /* | |
2286 | ||
2287 | LOCAL FUNCTION | |
2288 | ||
2289 | init_psymbol_list -- initialize storage for partial symbols | |
2290 | ||
2291 | SYNOPSIS | |
2292 | ||
1ab3bf1b | 2293 | static void init_psymbol_list (struct objfile *objfile, int total_symbols) |
35f5886e FF |
2294 | |
2295 | DESCRIPTION | |
2296 | ||
2297 | Initializes storage for all of the partial symbols that will be | |
2298 | created by dwarf_build_psymtabs and subsidiaries. | |
2299 | */ | |
2300 | ||
2301 | static void | |
1ab3bf1b JG |
2302 | init_psymbol_list (objfile, total_symbols) |
2303 | struct objfile *objfile; | |
2304 | int total_symbols; | |
35f5886e FF |
2305 | { |
2306 | /* Free any previously allocated psymbol lists. */ | |
2307 | ||
1ab3bf1b | 2308 | if (objfile -> global_psymbols.list) |
35f5886e | 2309 | { |
84ffdec2 | 2310 | mfree (objfile -> md, (PTR)objfile -> global_psymbols.list); |
35f5886e | 2311 | } |
1ab3bf1b | 2312 | if (objfile -> static_psymbols.list) |
35f5886e | 2313 | { |
84ffdec2 | 2314 | mfree (objfile -> md, (PTR)objfile -> static_psymbols.list); |
35f5886e FF |
2315 | } |
2316 | ||
2317 | /* Current best guess is that there are approximately a twentieth | |
2318 | of the total symbols (in a debugging file) are global or static | |
2319 | oriented symbols */ | |
2320 | ||
1ab3bf1b JG |
2321 | objfile -> global_psymbols.size = total_symbols / 10; |
2322 | objfile -> static_psymbols.size = total_symbols / 10; | |
2323 | objfile -> global_psymbols.next = | |
2324 | objfile -> global_psymbols.list = (struct partial_symbol *) | |
318bf84f | 2325 | xmmalloc (objfile -> md, objfile -> global_psymbols.size |
1ab3bf1b JG |
2326 | * sizeof (struct partial_symbol)); |
2327 | objfile -> static_psymbols.next = | |
2328 | objfile -> static_psymbols.list = (struct partial_symbol *) | |
318bf84f | 2329 | xmmalloc (objfile -> md, objfile -> static_psymbols.size |
1ab3bf1b | 2330 | * sizeof (struct partial_symbol)); |
35f5886e FF |
2331 | } |
2332 | ||
35f5886e FF |
2333 | /* |
2334 | ||
715cafcb FF |
2335 | LOCAL FUNCTION |
2336 | ||
2337 | add_enum_psymbol -- add enumeration members to partial symbol table | |
2338 | ||
2339 | DESCRIPTION | |
2340 | ||
2341 | Given pointer to a DIE that is known to be for an enumeration, | |
2342 | extract the symbolic names of the enumeration members and add | |
2343 | partial symbols for them. | |
2344 | */ | |
2345 | ||
2346 | static void | |
1ab3bf1b JG |
2347 | add_enum_psymbol (dip, objfile) |
2348 | struct dieinfo *dip; | |
2349 | struct objfile *objfile; | |
715cafcb FF |
2350 | { |
2351 | char *scan; | |
2352 | char *listend; | |
13b5a7ff FF |
2353 | unsigned short blocksz; |
2354 | int nbytes; | |
715cafcb FF |
2355 | |
2356 | if ((scan = dip -> at_element_list) != NULL) | |
2357 | { | |
2358 | if (dip -> short_element_list) | |
2359 | { | |
13b5a7ff | 2360 | nbytes = attribute_size (AT_short_element_list); |
715cafcb FF |
2361 | } |
2362 | else | |
2363 | { | |
13b5a7ff | 2364 | nbytes = attribute_size (AT_element_list); |
715cafcb | 2365 | } |
13b5a7ff FF |
2366 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); |
2367 | scan += nbytes; | |
2368 | listend = scan + blocksz; | |
715cafcb FF |
2369 | while (scan < listend) |
2370 | { | |
13b5a7ff | 2371 | scan += TARGET_FT_LONG_SIZE (objfile); |
b440b1e9 | 2372 | ADD_PSYMBOL_TO_LIST (scan, strlen (scan), VAR_NAMESPACE, LOC_CONST, |
1ab3bf1b | 2373 | objfile -> static_psymbols, 0); |
715cafcb FF |
2374 | scan += strlen (scan) + 1; |
2375 | } | |
2376 | } | |
2377 | } | |
2378 | ||
2379 | /* | |
2380 | ||
35f5886e FF |
2381 | LOCAL FUNCTION |
2382 | ||
2383 | add_partial_symbol -- add symbol to partial symbol table | |
2384 | ||
2385 | DESCRIPTION | |
2386 | ||
2387 | Given a DIE, if it is one of the types that we want to | |
2388 | add to a partial symbol table, finish filling in the die info | |
2389 | and then add a partial symbol table entry for it. | |
2390 | ||
95ff889e FF |
2391 | NOTES |
2392 | ||
2393 | The caller must ensure that the DIE has a valid name attribute. | |
35f5886e FF |
2394 | */ |
2395 | ||
2396 | static void | |
1ab3bf1b JG |
2397 | add_partial_symbol (dip, objfile) |
2398 | struct dieinfo *dip; | |
2399 | struct objfile *objfile; | |
35f5886e | 2400 | { |
13b5a7ff | 2401 | switch (dip -> die_tag) |
35f5886e FF |
2402 | { |
2403 | case TAG_global_subroutine: | |
1ab3bf1b JG |
2404 | record_minimal_symbol (dip -> at_name, dip -> at_low_pc, mst_text, |
2405 | objfile); | |
b440b1e9 | 2406 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2407 | VAR_NAMESPACE, LOC_BLOCK, |
2408 | objfile -> global_psymbols, | |
b440b1e9 | 2409 | dip -> at_low_pc); |
35f5886e FF |
2410 | break; |
2411 | case TAG_global_variable: | |
1ab3bf1b JG |
2412 | record_minimal_symbol (dip -> at_name, locval (dip -> at_location), |
2413 | mst_data, objfile); | |
b440b1e9 | 2414 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2415 | VAR_NAMESPACE, LOC_STATIC, |
2416 | objfile -> global_psymbols, | |
b440b1e9 | 2417 | 0); |
35f5886e FF |
2418 | break; |
2419 | case TAG_subroutine: | |
b440b1e9 | 2420 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2421 | VAR_NAMESPACE, LOC_BLOCK, |
2422 | objfile -> static_psymbols, | |
b440b1e9 | 2423 | dip -> at_low_pc); |
35f5886e FF |
2424 | break; |
2425 | case TAG_local_variable: | |
b440b1e9 | 2426 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2427 | VAR_NAMESPACE, LOC_STATIC, |
2428 | objfile -> static_psymbols, | |
b440b1e9 | 2429 | 0); |
35f5886e FF |
2430 | break; |
2431 | case TAG_typedef: | |
b440b1e9 | 2432 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2433 | VAR_NAMESPACE, LOC_TYPEDEF, |
2434 | objfile -> static_psymbols, | |
b440b1e9 | 2435 | 0); |
35f5886e | 2436 | break; |
95ff889e | 2437 | case TAG_class_type: |
35f5886e FF |
2438 | case TAG_structure_type: |
2439 | case TAG_union_type: | |
95ff889e | 2440 | case TAG_enumeration_type: |
b440b1e9 | 2441 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2442 | STRUCT_NAMESPACE, LOC_TYPEDEF, |
2443 | objfile -> static_psymbols, | |
b440b1e9 | 2444 | 0); |
95ff889e | 2445 | if (cu_language == language_cplus) |
715cafcb | 2446 | { |
95ff889e | 2447 | /* For C++, these implicitly act as typedefs as well. */ |
b440b1e9 | 2448 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
95ff889e | 2449 | VAR_NAMESPACE, LOC_TYPEDEF, |
1ab3bf1b | 2450 | objfile -> static_psymbols, |
b440b1e9 | 2451 | 0); |
715cafcb | 2452 | } |
715cafcb | 2453 | break; |
35f5886e FF |
2454 | } |
2455 | } | |
2456 | ||
2457 | /* | |
2458 | ||
2459 | LOCAL FUNCTION | |
2460 | ||
2461 | scan_partial_symbols -- scan DIE's within a single compilation unit | |
2462 | ||
2463 | DESCRIPTION | |
2464 | ||
2465 | Process the DIE's within a single compilation unit, looking for | |
2466 | interesting DIE's that contribute to the partial symbol table entry | |
a679650f | 2467 | for this compilation unit. |
35f5886e | 2468 | |
2d6186f4 FF |
2469 | NOTES |
2470 | ||
a679650f FF |
2471 | There are some DIE's that may appear both at file scope and within |
2472 | the scope of a function. We are only interested in the ones at file | |
2473 | scope, and the only way to tell them apart is to keep track of the | |
2474 | scope. For example, consider the test case: | |
2475 | ||
2476 | static int i; | |
2477 | main () { int j; } | |
2478 | ||
2479 | for which the relevant DWARF segment has the structure: | |
2480 | ||
2481 | 0x51: | |
2482 | 0x23 global subrtn sibling 0x9b | |
2483 | name main | |
2484 | fund_type FT_integer | |
2485 | low_pc 0x800004cc | |
2486 | high_pc 0x800004d4 | |
2487 | ||
2488 | 0x74: | |
2489 | 0x23 local var sibling 0x97 | |
2490 | name j | |
2491 | fund_type FT_integer | |
2492 | location OP_BASEREG 0xe | |
2493 | OP_CONST 0xfffffffc | |
2494 | OP_ADD | |
2495 | 0x97: | |
2496 | 0x4 | |
2497 | ||
2498 | 0x9b: | |
2499 | 0x1d local var sibling 0xb8 | |
2500 | name i | |
2501 | fund_type FT_integer | |
2502 | location OP_ADDR 0x800025dc | |
2503 | ||
2504 | 0xb8: | |
2505 | 0x4 | |
2506 | ||
2507 | We want to include the symbol 'i' in the partial symbol table, but | |
2508 | not the symbol 'j'. In essence, we want to skip all the dies within | |
2509 | the scope of a TAG_global_subroutine DIE. | |
2510 | ||
715cafcb FF |
2511 | Don't attempt to add anonymous structures or unions since they have |
2512 | no name. Anonymous enumerations however are processed, because we | |
2513 | want to extract their member names (the check for a tag name is | |
2514 | done later). | |
2d6186f4 | 2515 | |
715cafcb FF |
2516 | Also, for variables and subroutines, check that this is the place |
2517 | where the actual definition occurs, rather than just a reference | |
2518 | to an external. | |
35f5886e FF |
2519 | */ |
2520 | ||
2521 | static void | |
1ab3bf1b JG |
2522 | scan_partial_symbols (thisdie, enddie, objfile) |
2523 | char *thisdie; | |
2524 | char *enddie; | |
2525 | struct objfile *objfile; | |
35f5886e FF |
2526 | { |
2527 | char *nextdie; | |
a679650f | 2528 | char *temp; |
35f5886e FF |
2529 | struct dieinfo di; |
2530 | ||
2531 | while (thisdie < enddie) | |
2532 | { | |
95967e73 | 2533 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2534 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2535 | { |
2536 | break; | |
2537 | } | |
2538 | else | |
2539 | { | |
13b5a7ff | 2540 | nextdie = thisdie + di.die_length; |
715cafcb FF |
2541 | /* To avoid getting complete die information for every die, we |
2542 | only do it (below) for the cases we are interested in. */ | |
13b5a7ff | 2543 | switch (di.die_tag) |
35f5886e FF |
2544 | { |
2545 | case TAG_global_subroutine: | |
35f5886e | 2546 | case TAG_subroutine: |
a679650f FF |
2547 | completedieinfo (&di, objfile); |
2548 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2549 | { | |
2550 | add_partial_symbol (&di, objfile); | |
2551 | /* If there is a sibling attribute, adjust the nextdie | |
2552 | pointer to skip the entire scope of the subroutine. | |
2553 | Apply some sanity checking to make sure we don't | |
2554 | overrun or underrun the range of remaining DIE's */ | |
2555 | if (di.at_sibling != 0) | |
2556 | { | |
2557 | temp = dbbase + di.at_sibling - dbroff; | |
2558 | if ((temp < thisdie) || (temp >= enddie)) | |
2559 | { | |
2560 | dwarfwarn ("reference to DIE (0x%x) outside compilation unit", di.at_sibling); | |
2561 | } | |
2562 | else | |
2563 | { | |
2564 | nextdie = temp; | |
2565 | } | |
2566 | } | |
2567 | } | |
2568 | break; | |
2d6186f4 | 2569 | case TAG_global_variable: |
35f5886e | 2570 | case TAG_local_variable: |
95967e73 | 2571 | completedieinfo (&di, objfile); |
2d6186f4 FF |
2572 | if (di.at_name && (di.has_at_low_pc || di.at_location)) |
2573 | { | |
1ab3bf1b | 2574 | add_partial_symbol (&di, objfile); |
2d6186f4 FF |
2575 | } |
2576 | break; | |
35f5886e | 2577 | case TAG_typedef: |
95ff889e | 2578 | case TAG_class_type: |
35f5886e FF |
2579 | case TAG_structure_type: |
2580 | case TAG_union_type: | |
95967e73 | 2581 | completedieinfo (&di, objfile); |
2d6186f4 | 2582 | if (di.at_name) |
35f5886e | 2583 | { |
1ab3bf1b | 2584 | add_partial_symbol (&di, objfile); |
35f5886e FF |
2585 | } |
2586 | break; | |
715cafcb | 2587 | case TAG_enumeration_type: |
95967e73 | 2588 | completedieinfo (&di, objfile); |
95ff889e FF |
2589 | if (di.at_name) |
2590 | { | |
2591 | add_partial_symbol (&di, objfile); | |
2592 | } | |
2593 | add_enum_psymbol (&di, objfile); | |
715cafcb | 2594 | break; |
35f5886e FF |
2595 | } |
2596 | } | |
2597 | thisdie = nextdie; | |
2598 | } | |
2599 | } | |
2600 | ||
2601 | /* | |
2602 | ||
2603 | LOCAL FUNCTION | |
2604 | ||
2605 | scan_compilation_units -- build a psymtab entry for each compilation | |
2606 | ||
2607 | DESCRIPTION | |
2608 | ||
2609 | This is the top level dwarf parsing routine for building partial | |
2610 | symbol tables. | |
2611 | ||
2612 | It scans from the beginning of the DWARF table looking for the first | |
2613 | TAG_compile_unit DIE, and then follows the sibling chain to locate | |
2614 | each additional TAG_compile_unit DIE. | |
2615 | ||
2616 | For each TAG_compile_unit DIE it creates a partial symtab structure, | |
2617 | calls a subordinate routine to collect all the compilation unit's | |
2618 | global DIE's, file scope DIEs, typedef DIEs, etc, and then links the | |
2619 | new partial symtab structure into the partial symbol table. It also | |
2620 | records the appropriate information in the partial symbol table entry | |
2621 | to allow the chunk of DIE's and line number table for this compilation | |
2622 | unit to be located and re-read later, to generate a complete symbol | |
2623 | table entry for the compilation unit. | |
2624 | ||
2625 | Thus it effectively partitions up a chunk of DIE's for multiple | |
2626 | compilation units into smaller DIE chunks and line number tables, | |
2627 | and associates them with a partial symbol table entry. | |
2628 | ||
2629 | NOTES | |
2630 | ||
2631 | If any compilation unit has no line number table associated with | |
2632 | it for some reason (a missing at_stmt_list attribute, rather than | |
2633 | just one with a value of zero, which is valid) then we ensure that | |
2634 | the recorded file offset is zero so that the routine which later | |
2635 | reads line number table fragments knows that there is no fragment | |
2636 | to read. | |
2637 | ||
2638 | RETURNS | |
2639 | ||
2640 | Returns no value. | |
2641 | ||
2642 | */ | |
2643 | ||
2644 | static void | |
d5931d79 | 2645 | scan_compilation_units (thisdie, enddie, dbfoff, lnoffset, objfile) |
1ab3bf1b JG |
2646 | char *thisdie; |
2647 | char *enddie; | |
d5931d79 JG |
2648 | file_ptr dbfoff; |
2649 | file_ptr lnoffset; | |
1ab3bf1b | 2650 | struct objfile *objfile; |
35f5886e FF |
2651 | { |
2652 | char *nextdie; | |
2653 | struct dieinfo di; | |
2654 | struct partial_symtab *pst; | |
2655 | int culength; | |
2656 | int curoff; | |
d5931d79 | 2657 | file_ptr curlnoffset; |
35f5886e FF |
2658 | |
2659 | while (thisdie < enddie) | |
2660 | { | |
95967e73 | 2661 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2662 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2663 | { |
2664 | break; | |
2665 | } | |
13b5a7ff | 2666 | else if (di.die_tag != TAG_compile_unit) |
35f5886e | 2667 | { |
13b5a7ff | 2668 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2669 | } |
2670 | else | |
2671 | { | |
95967e73 | 2672 | completedieinfo (&di, objfile); |
95ff889e | 2673 | set_cu_language (&di); |
35f5886e FF |
2674 | if (di.at_sibling != 0) |
2675 | { | |
2676 | nextdie = dbbase + di.at_sibling - dbroff; | |
2677 | } | |
2678 | else | |
2679 | { | |
13b5a7ff | 2680 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2681 | } |
2682 | curoff = thisdie - dbbase; | |
2683 | culength = nextdie - thisdie; | |
2d6186f4 | 2684 | curlnoffset = di.has_at_stmt_list ? lnoffset + di.at_stmt_list : 0; |
1ab3bf1b JG |
2685 | |
2686 | /* First allocate a new partial symbol table structure */ | |
2687 | ||
95ff889e FF |
2688 | pst = start_psymtab_common (objfile, base_section_offsets, |
2689 | di.at_name, di.at_low_pc, | |
1ab3bf1b JG |
2690 | objfile -> global_psymbols.next, |
2691 | objfile -> static_psymbols.next); | |
2692 | ||
2693 | pst -> texthigh = di.at_high_pc; | |
2694 | pst -> read_symtab_private = (char *) | |
2695 | obstack_alloc (&objfile -> psymbol_obstack, | |
2696 | sizeof (struct dwfinfo)); | |
2697 | DBFOFF (pst) = dbfoff; | |
2698 | DBROFF (pst) = curoff; | |
2699 | DBLENGTH (pst) = culength; | |
2700 | LNFOFF (pst) = curlnoffset; | |
2701 | pst -> read_symtab = dwarf_psymtab_to_symtab; | |
2702 | ||
2703 | /* Now look for partial symbols */ | |
2704 | ||
13b5a7ff | 2705 | scan_partial_symbols (thisdie + di.die_length, nextdie, objfile); |
1ab3bf1b JG |
2706 | |
2707 | pst -> n_global_syms = objfile -> global_psymbols.next - | |
2708 | (objfile -> global_psymbols.list + pst -> globals_offset); | |
2709 | pst -> n_static_syms = objfile -> static_psymbols.next - | |
2710 | (objfile -> static_psymbols.list + pst -> statics_offset); | |
2711 | sort_pst_symbols (pst); | |
35f5886e FF |
2712 | /* If there is already a psymtab or symtab for a file of this name, |
2713 | remove it. (If there is a symtab, more drastic things also | |
2714 | happen.) This happens in VxWorks. */ | |
2715 | free_named_symtabs (pst -> filename); | |
35f5886e FF |
2716 | } |
2717 | thisdie = nextdie; | |
2718 | } | |
2719 | } | |
2720 | ||
2721 | /* | |
2722 | ||
2723 | LOCAL FUNCTION | |
2724 | ||
2725 | new_symbol -- make a symbol table entry for a new symbol | |
2726 | ||
2727 | SYNOPSIS | |
2728 | ||
1ab3bf1b JG |
2729 | static struct symbol *new_symbol (struct dieinfo *dip, |
2730 | struct objfile *objfile) | |
35f5886e FF |
2731 | |
2732 | DESCRIPTION | |
2733 | ||
2734 | Given a pointer to a DWARF information entry, figure out if we need | |
2735 | to make a symbol table entry for it, and if so, create a new entry | |
2736 | and return a pointer to it. | |
2737 | */ | |
2738 | ||
2739 | static struct symbol * | |
1ab3bf1b JG |
2740 | new_symbol (dip, objfile) |
2741 | struct dieinfo *dip; | |
2742 | struct objfile *objfile; | |
35f5886e FF |
2743 | { |
2744 | struct symbol *sym = NULL; | |
2745 | ||
2746 | if (dip -> at_name != NULL) | |
2747 | { | |
1ab3bf1b | 2748 | sym = (struct symbol *) obstack_alloc (&objfile -> symbol_obstack, |
35f5886e | 2749 | sizeof (struct symbol)); |
4ed3a9ea | 2750 | memset (sym, 0, sizeof (struct symbol)); |
95ff889e FF |
2751 | SYMBOL_NAME (sym) = create_name (dip -> at_name, |
2752 | &objfile->symbol_obstack); | |
35f5886e FF |
2753 | /* default assumptions */ |
2754 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2755 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2756 | SYMBOL_TYPE (sym) = decode_die_type (dip); | |
13b5a7ff | 2757 | switch (dip -> die_tag) |
35f5886e FF |
2758 | { |
2759 | case TAG_label: | |
4d315a07 | 2760 | SYMBOL_VALUE (sym) = dip -> at_low_pc; |
35f5886e FF |
2761 | SYMBOL_CLASS (sym) = LOC_LABEL; |
2762 | break; | |
2763 | case TAG_global_subroutine: | |
2764 | case TAG_subroutine: | |
4d315a07 | 2765 | SYMBOL_VALUE (sym) = dip -> at_low_pc; |
35f5886e FF |
2766 | SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym)); |
2767 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
13b5a7ff | 2768 | if (dip -> die_tag == TAG_global_subroutine) |
35f5886e FF |
2769 | { |
2770 | add_symbol_to_list (sym, &global_symbols); | |
2771 | } | |
2772 | else | |
2773 | { | |
4d315a07 | 2774 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2775 | } |
2776 | break; | |
2777 | case TAG_global_variable: | |
35f5886e FF |
2778 | if (dip -> at_location != NULL) |
2779 | { | |
2780 | SYMBOL_VALUE (sym) = locval (dip -> at_location); | |
35f5886e FF |
2781 | add_symbol_to_list (sym, &global_symbols); |
2782 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2783 | SYMBOL_VALUE (sym) += baseaddr; | |
2784 | } | |
a5bd5ba6 FF |
2785 | break; |
2786 | case TAG_local_variable: | |
2787 | if (dip -> at_location != NULL) | |
35f5886e | 2788 | { |
a5bd5ba6 | 2789 | SYMBOL_VALUE (sym) = locval (dip -> at_location); |
4d315a07 | 2790 | add_symbol_to_list (sym, list_in_scope); |
a5bd5ba6 FF |
2791 | if (isreg) |
2792 | { | |
2793 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
2794 | } | |
2795 | else if (offreg) | |
35f5886e | 2796 | { |
a5bd5ba6 | 2797 | SYMBOL_CLASS (sym) = LOC_LOCAL; |
35f5886e FF |
2798 | } |
2799 | else | |
2800 | { | |
2801 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2802 | SYMBOL_VALUE (sym) += baseaddr; | |
2803 | } | |
2804 | } | |
2805 | break; | |
2806 | case TAG_formal_parameter: | |
2807 | if (dip -> at_location != NULL) | |
2808 | { | |
2809 | SYMBOL_VALUE (sym) = locval (dip -> at_location); | |
2810 | } | |
4d315a07 | 2811 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2812 | if (isreg) |
2813 | { | |
2814 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
2815 | } | |
2816 | else | |
2817 | { | |
2818 | SYMBOL_CLASS (sym) = LOC_ARG; | |
2819 | } | |
2820 | break; | |
2821 | case TAG_unspecified_parameters: | |
2822 | /* From varargs functions; gdb doesn't seem to have any interest in | |
2823 | this information, so just ignore it for now. (FIXME?) */ | |
2824 | break; | |
95ff889e | 2825 | case TAG_class_type: |
35f5886e FF |
2826 | case TAG_structure_type: |
2827 | case TAG_union_type: | |
2828 | case TAG_enumeration_type: | |
2829 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
2830 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
4d315a07 | 2831 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2832 | break; |
2833 | case TAG_typedef: | |
2834 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
2835 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
4d315a07 | 2836 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2837 | break; |
2838 | default: | |
2839 | /* Not a tag we recognize. Hopefully we aren't processing trash | |
2840 | data, but since we must specifically ignore things we don't | |
2841 | recognize, there is nothing else we should do at this point. */ | |
2842 | break; | |
2843 | } | |
2844 | } | |
2845 | return (sym); | |
2846 | } | |
2847 | ||
2848 | /* | |
2849 | ||
95ff889e FF |
2850 | LOCAL FUNCTION |
2851 | ||
2852 | synthesize_typedef -- make a symbol table entry for a "fake" typedef | |
2853 | ||
2854 | SYNOPSIS | |
2855 | ||
2856 | static void synthesize_typedef (struct dieinfo *dip, | |
2857 | struct objfile *objfile, | |
2858 | struct type *type); | |
2859 | ||
2860 | DESCRIPTION | |
2861 | ||
2862 | Given a pointer to a DWARF information entry, synthesize a typedef | |
2863 | for the name in the DIE, using the specified type. | |
2864 | ||
2865 | This is used for C++ class, structs, unions, and enumerations to | |
2866 | set up the tag name as a type. | |
2867 | ||
2868 | */ | |
2869 | ||
2870 | static void | |
2871 | synthesize_typedef (dip, objfile, type) | |
2872 | struct dieinfo *dip; | |
2873 | struct objfile *objfile; | |
2874 | struct type *type; | |
2875 | { | |
2876 | struct symbol *sym = NULL; | |
2877 | ||
2878 | if (dip -> at_name != NULL) | |
2879 | { | |
2880 | sym = (struct symbol *) | |
2881 | obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symbol)); | |
2882 | memset (sym, 0, sizeof (struct symbol)); | |
2883 | SYMBOL_NAME (sym) = create_name (dip -> at_name, | |
2884 | &objfile->symbol_obstack); | |
2885 | SYMBOL_TYPE (sym) = type; | |
2886 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
2887 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2888 | add_symbol_to_list (sym, list_in_scope); | |
2889 | } | |
2890 | } | |
2891 | ||
2892 | /* | |
2893 | ||
35f5886e FF |
2894 | LOCAL FUNCTION |
2895 | ||
2896 | decode_mod_fund_type -- decode a modified fundamental type | |
2897 | ||
2898 | SYNOPSIS | |
2899 | ||
2900 | static struct type *decode_mod_fund_type (char *typedata) | |
2901 | ||
2902 | DESCRIPTION | |
2903 | ||
2904 | Decode a block of data containing a modified fundamental | |
2905 | type specification. TYPEDATA is a pointer to the block, | |
13b5a7ff FF |
2906 | which starts with a length containing the size of the rest |
2907 | of the block. At the end of the block is a fundmental type | |
2908 | code value that gives the fundamental type. Everything | |
35f5886e FF |
2909 | in between are type modifiers. |
2910 | ||
2911 | We simply compute the number of modifiers and call the general | |
2912 | function decode_modified_type to do the actual work. | |
2913 | */ | |
2914 | ||
2915 | static struct type * | |
1ab3bf1b JG |
2916 | decode_mod_fund_type (typedata) |
2917 | char *typedata; | |
35f5886e FF |
2918 | { |
2919 | struct type *typep = NULL; | |
2920 | unsigned short modcount; | |
13b5a7ff | 2921 | int nbytes; |
35f5886e FF |
2922 | |
2923 | /* Get the total size of the block, exclusive of the size itself */ | |
13b5a7ff FF |
2924 | |
2925 | nbytes = attribute_size (AT_mod_fund_type); | |
2926 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
2927 | typedata += nbytes; | |
2928 | ||
35f5886e | 2929 | /* Deduct the size of the fundamental type bytes at the end of the block. */ |
13b5a7ff FF |
2930 | |
2931 | modcount -= attribute_size (AT_fund_type); | |
2932 | ||
35f5886e | 2933 | /* Now do the actual decoding */ |
13b5a7ff FF |
2934 | |
2935 | typep = decode_modified_type (typedata, modcount, AT_mod_fund_type); | |
35f5886e FF |
2936 | return (typep); |
2937 | } | |
2938 | ||
2939 | /* | |
2940 | ||
2941 | LOCAL FUNCTION | |
2942 | ||
2943 | decode_mod_u_d_type -- decode a modified user defined type | |
2944 | ||
2945 | SYNOPSIS | |
2946 | ||
2947 | static struct type *decode_mod_u_d_type (char *typedata) | |
2948 | ||
2949 | DESCRIPTION | |
2950 | ||
2951 | Decode a block of data containing a modified user defined | |
2952 | type specification. TYPEDATA is a pointer to the block, | |
2953 | which consists of a two byte length, containing the size | |
2954 | of the rest of the block. At the end of the block is a | |
2955 | four byte value that gives a reference to a user defined type. | |
2956 | Everything in between are type modifiers. | |
2957 | ||
2958 | We simply compute the number of modifiers and call the general | |
2959 | function decode_modified_type to do the actual work. | |
2960 | */ | |
2961 | ||
2962 | static struct type * | |
1ab3bf1b JG |
2963 | decode_mod_u_d_type (typedata) |
2964 | char *typedata; | |
35f5886e FF |
2965 | { |
2966 | struct type *typep = NULL; | |
2967 | unsigned short modcount; | |
13b5a7ff | 2968 | int nbytes; |
35f5886e FF |
2969 | |
2970 | /* Get the total size of the block, exclusive of the size itself */ | |
13b5a7ff FF |
2971 | |
2972 | nbytes = attribute_size (AT_mod_u_d_type); | |
2973 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
2974 | typedata += nbytes; | |
2975 | ||
35f5886e | 2976 | /* Deduct the size of the reference type bytes at the end of the block. */ |
13b5a7ff FF |
2977 | |
2978 | modcount -= attribute_size (AT_user_def_type); | |
2979 | ||
35f5886e | 2980 | /* Now do the actual decoding */ |
13b5a7ff FF |
2981 | |
2982 | typep = decode_modified_type (typedata, modcount, AT_mod_u_d_type); | |
35f5886e FF |
2983 | return (typep); |
2984 | } | |
2985 | ||
2986 | /* | |
2987 | ||
2988 | LOCAL FUNCTION | |
2989 | ||
2990 | decode_modified_type -- decode modified user or fundamental type | |
2991 | ||
2992 | SYNOPSIS | |
2993 | ||
1c92ca6f | 2994 | static struct type *decode_modified_type (char *modifiers, |
35f5886e FF |
2995 | unsigned short modcount, int mtype) |
2996 | ||
2997 | DESCRIPTION | |
2998 | ||
2999 | Decode a modified type, either a modified fundamental type or | |
3000 | a modified user defined type. MODIFIERS is a pointer to the | |
3001 | block of bytes that define MODCOUNT modifiers. Immediately | |
3002 | following the last modifier is a short containing the fundamental | |
3003 | type or a long containing the reference to the user defined | |
3004 | type. Which one is determined by MTYPE, which is either | |
3005 | AT_mod_fund_type or AT_mod_u_d_type to indicate what modified | |
3006 | type we are generating. | |
3007 | ||
3008 | We call ourself recursively to generate each modified type,` | |
3009 | until MODCOUNT reaches zero, at which point we have consumed | |
3010 | all the modifiers and generate either the fundamental type or | |
3011 | user defined type. When the recursion unwinds, each modifier | |
3012 | is applied in turn to generate the full modified type. | |
3013 | ||
3014 | NOTES | |
3015 | ||
3016 | If we find a modifier that we don't recognize, and it is not one | |
3017 | of those reserved for application specific use, then we issue a | |
3018 | warning and simply ignore the modifier. | |
3019 | ||
3020 | BUGS | |
3021 | ||
3022 | We currently ignore MOD_const and MOD_volatile. (FIXME) | |
3023 | ||
3024 | */ | |
3025 | ||
3026 | static struct type * | |
1ab3bf1b | 3027 | decode_modified_type (modifiers, modcount, mtype) |
1c92ca6f | 3028 | char *modifiers; |
1ab3bf1b JG |
3029 | unsigned int modcount; |
3030 | int mtype; | |
35f5886e FF |
3031 | { |
3032 | struct type *typep = NULL; | |
3033 | unsigned short fundtype; | |
13b5a7ff | 3034 | DIE_REF die_ref; |
1c92ca6f | 3035 | char modifier; |
13b5a7ff | 3036 | int nbytes; |
35f5886e FF |
3037 | |
3038 | if (modcount == 0) | |
3039 | { | |
3040 | switch (mtype) | |
3041 | { | |
3042 | case AT_mod_fund_type: | |
13b5a7ff FF |
3043 | nbytes = attribute_size (AT_fund_type); |
3044 | fundtype = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3045 | current_objfile); | |
35f5886e FF |
3046 | typep = decode_fund_type (fundtype); |
3047 | break; | |
3048 | case AT_mod_u_d_type: | |
13b5a7ff FF |
3049 | nbytes = attribute_size (AT_user_def_type); |
3050 | die_ref = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3051 | current_objfile); | |
3052 | if ((typep = lookup_utype (die_ref)) == NULL) | |
35f5886e | 3053 | { |
13b5a7ff | 3054 | typep = alloc_utype (die_ref, NULL); |
35f5886e FF |
3055 | } |
3056 | break; | |
3057 | default: | |
3058 | SQUAWK (("botched modified type decoding (mtype 0x%x)", mtype)); | |
1ab3bf1b | 3059 | typep = lookup_fundamental_type (current_objfile, FT_INTEGER); |
35f5886e FF |
3060 | break; |
3061 | } | |
3062 | } | |
3063 | else | |
3064 | { | |
3065 | modifier = *modifiers++; | |
3066 | typep = decode_modified_type (modifiers, --modcount, mtype); | |
3067 | switch (modifier) | |
3068 | { | |
13b5a7ff FF |
3069 | case MOD_pointer_to: |
3070 | typep = lookup_pointer_type (typep); | |
3071 | break; | |
3072 | case MOD_reference_to: | |
3073 | typep = lookup_reference_type (typep); | |
3074 | break; | |
3075 | case MOD_const: | |
3076 | SQUAWK (("type modifier 'const' ignored")); /* FIXME */ | |
3077 | break; | |
3078 | case MOD_volatile: | |
3079 | SQUAWK (("type modifier 'volatile' ignored")); /* FIXME */ | |
3080 | break; | |
3081 | default: | |
1c92ca6f FF |
3082 | if (!(MOD_lo_user <= (unsigned char) modifier |
3083 | && (unsigned char) modifier <= MOD_hi_user)) | |
13b5a7ff | 3084 | { |
1c92ca6f FF |
3085 | SQUAWK (("unknown type modifier %u", |
3086 | (unsigned char) modifier)); | |
13b5a7ff FF |
3087 | } |
3088 | break; | |
35f5886e FF |
3089 | } |
3090 | } | |
3091 | return (typep); | |
3092 | } | |
3093 | ||
3094 | /* | |
3095 | ||
3096 | LOCAL FUNCTION | |
3097 | ||
3098 | decode_fund_type -- translate basic DWARF type to gdb base type | |
3099 | ||
3100 | DESCRIPTION | |
3101 | ||
3102 | Given an integer that is one of the fundamental DWARF types, | |
3103 | translate it to one of the basic internal gdb types and return | |
3104 | a pointer to the appropriate gdb type (a "struct type *"). | |
3105 | ||
3106 | NOTES | |
3107 | ||
3108 | If we encounter a fundamental type that we are unprepared to | |
3109 | deal with, and it is not in the range of those types defined | |
3110 | as application specific types, then we issue a warning and | |
1ab3bf1b | 3111 | treat the type as an "int". |
35f5886e FF |
3112 | */ |
3113 | ||
3114 | static struct type * | |
1ab3bf1b JG |
3115 | decode_fund_type (fundtype) |
3116 | unsigned int fundtype; | |
35f5886e FF |
3117 | { |
3118 | struct type *typep = NULL; | |
3119 | ||
3120 | switch (fundtype) | |
3121 | { | |
3122 | ||
3123 | case FT_void: | |
1ab3bf1b | 3124 | typep = lookup_fundamental_type (current_objfile, FT_VOID); |
35f5886e FF |
3125 | break; |
3126 | ||
1ab3bf1b JG |
3127 | case FT_boolean: /* Was FT_set in AT&T version */ |
3128 | typep = lookup_fundamental_type (current_objfile, FT_BOOLEAN); | |
3129 | break; | |
3130 | ||
35f5886e | 3131 | case FT_pointer: /* (void *) */ |
1ab3bf1b JG |
3132 | typep = lookup_fundamental_type (current_objfile, FT_VOID); |
3133 | typep = lookup_pointer_type (typep); | |
35f5886e FF |
3134 | break; |
3135 | ||
3136 | case FT_char: | |
1ab3bf1b JG |
3137 | typep = lookup_fundamental_type (current_objfile, FT_CHAR); |
3138 | break; | |
3139 | ||
35f5886e | 3140 | case FT_signed_char: |
1ab3bf1b JG |
3141 | typep = lookup_fundamental_type (current_objfile, FT_SIGNED_CHAR); |
3142 | break; | |
3143 | ||
3144 | case FT_unsigned_char: | |
3145 | typep = lookup_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); | |
35f5886e FF |
3146 | break; |
3147 | ||
3148 | case FT_short: | |
1ab3bf1b JG |
3149 | typep = lookup_fundamental_type (current_objfile, FT_SHORT); |
3150 | break; | |
3151 | ||
35f5886e | 3152 | case FT_signed_short: |
1ab3bf1b JG |
3153 | typep = lookup_fundamental_type (current_objfile, FT_SIGNED_SHORT); |
3154 | break; | |
3155 | ||
3156 | case FT_unsigned_short: | |
3157 | typep = lookup_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); | |
35f5886e FF |
3158 | break; |
3159 | ||
3160 | case FT_integer: | |
1ab3bf1b JG |
3161 | typep = lookup_fundamental_type (current_objfile, FT_INTEGER); |
3162 | break; | |
3163 | ||
35f5886e | 3164 | case FT_signed_integer: |
1ab3bf1b JG |
3165 | typep = lookup_fundamental_type (current_objfile, FT_SIGNED_INTEGER); |
3166 | break; | |
3167 | ||
3168 | case FT_unsigned_integer: | |
3169 | typep = lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); | |
35f5886e FF |
3170 | break; |
3171 | ||
3172 | case FT_long: | |
1ab3bf1b JG |
3173 | typep = lookup_fundamental_type (current_objfile, FT_LONG); |
3174 | break; | |
3175 | ||
35f5886e | 3176 | case FT_signed_long: |
1ab3bf1b | 3177 | typep = lookup_fundamental_type (current_objfile, FT_SIGNED_LONG); |
35f5886e FF |
3178 | break; |
3179 | ||
1ab3bf1b JG |
3180 | case FT_unsigned_long: |
3181 | typep = lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG); | |
35f5886e FF |
3182 | break; |
3183 | ||
1ab3bf1b JG |
3184 | case FT_long_long: |
3185 | typep = lookup_fundamental_type (current_objfile, FT_LONG_LONG); | |
35f5886e | 3186 | break; |
1ab3bf1b JG |
3187 | |
3188 | case FT_signed_long_long: | |
3189 | typep = lookup_fundamental_type (current_objfile, FT_SIGNED_LONG_LONG); | |
35f5886e | 3190 | break; |
1ab3bf1b JG |
3191 | |
3192 | case FT_unsigned_long_long: | |
3193 | typep = lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); | |
35f5886e | 3194 | break; |
1ab3bf1b JG |
3195 | |
3196 | case FT_float: | |
3197 | typep = lookup_fundamental_type (current_objfile, FT_FLOAT); | |
35f5886e FF |
3198 | break; |
3199 | ||
1ab3bf1b JG |
3200 | case FT_dbl_prec_float: |
3201 | typep = lookup_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); | |
35f5886e FF |
3202 | break; |
3203 | ||
3204 | case FT_ext_prec_float: | |
1ab3bf1b | 3205 | typep = lookup_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); |
35f5886e FF |
3206 | break; |
3207 | ||
3208 | case FT_complex: | |
1ab3bf1b | 3209 | typep = lookup_fundamental_type (current_objfile, FT_COMPLEX); |
35f5886e FF |
3210 | break; |
3211 | ||
3212 | case FT_dbl_prec_complex: | |
1ab3bf1b | 3213 | typep = lookup_fundamental_type (current_objfile, FT_DBL_PREC_COMPLEX); |
35f5886e FF |
3214 | break; |
3215 | ||
1ab3bf1b JG |
3216 | case FT_ext_prec_complex: |
3217 | typep = lookup_fundamental_type (current_objfile, FT_EXT_PREC_COMPLEX); | |
35f5886e | 3218 | break; |
1ab3bf1b | 3219 | |
35f5886e FF |
3220 | } |
3221 | ||
3222 | if ((typep == NULL) && !(FT_lo_user <= fundtype && fundtype <= FT_hi_user)) | |
3223 | { | |
3224 | SQUAWK (("unexpected fundamental type 0x%x", fundtype)); | |
1ab3bf1b | 3225 | typep = lookup_fundamental_type (current_objfile, FT_VOID); |
35f5886e FF |
3226 | } |
3227 | ||
3228 | return (typep); | |
3229 | } | |
3230 | ||
3231 | /* | |
3232 | ||
3233 | LOCAL FUNCTION | |
3234 | ||
3235 | create_name -- allocate a fresh copy of a string on an obstack | |
3236 | ||
3237 | DESCRIPTION | |
3238 | ||
3239 | Given a pointer to a string and a pointer to an obstack, allocates | |
3240 | a fresh copy of the string on the specified obstack. | |
3241 | ||
3242 | */ | |
3243 | ||
3244 | static char * | |
1ab3bf1b JG |
3245 | create_name (name, obstackp) |
3246 | char *name; | |
3247 | struct obstack *obstackp; | |
35f5886e FF |
3248 | { |
3249 | int length; | |
3250 | char *newname; | |
3251 | ||
3252 | length = strlen (name) + 1; | |
3253 | newname = (char *) obstack_alloc (obstackp, length); | |
4ed3a9ea | 3254 | strcpy (newname, name); |
35f5886e FF |
3255 | return (newname); |
3256 | } | |
3257 | ||
3258 | /* | |
3259 | ||
3260 | LOCAL FUNCTION | |
3261 | ||
3262 | basicdieinfo -- extract the minimal die info from raw die data | |
3263 | ||
3264 | SYNOPSIS | |
3265 | ||
95967e73 FF |
3266 | void basicdieinfo (char *diep, struct dieinfo *dip, |
3267 | struct objfile *objfile) | |
35f5886e FF |
3268 | |
3269 | DESCRIPTION | |
3270 | ||
3271 | Given a pointer to raw DIE data, and a pointer to an instance of a | |
3272 | die info structure, this function extracts the basic information | |
3273 | from the DIE data required to continue processing this DIE, along | |
3274 | with some bookkeeping information about the DIE. | |
3275 | ||
3276 | The information we absolutely must have includes the DIE tag, | |
3277 | and the DIE length. If we need the sibling reference, then we | |
3278 | will have to call completedieinfo() to process all the remaining | |
3279 | DIE information. | |
3280 | ||
3281 | Note that since there is no guarantee that the data is properly | |
3282 | aligned in memory for the type of access required (indirection | |
95967e73 FF |
3283 | through anything other than a char pointer), and there is no |
3284 | guarantee that it is in the same byte order as the gdb host, | |
3285 | we call a function which deals with both alignment and byte | |
3286 | swapping issues. Possibly inefficient, but quite portable. | |
35f5886e FF |
3287 | |
3288 | We also take care of some other basic things at this point, such | |
3289 | as ensuring that the instance of the die info structure starts | |
3290 | out completely zero'd and that curdie is initialized for use | |
3291 | in error reporting if we have a problem with the current die. | |
3292 | ||
3293 | NOTES | |
3294 | ||
3295 | All DIE's must have at least a valid length, thus the minimum | |
13b5a7ff FF |
3296 | DIE size is SIZEOF_DIE_LENGTH. In order to have a valid tag, the |
3297 | DIE size must be at least SIZEOF_DIE_TAG larger, otherwise they | |
35f5886e FF |
3298 | are forced to be TAG_padding DIES. |
3299 | ||
13b5a7ff FF |
3300 | Padding DIES must be at least SIZEOF_DIE_LENGTH in length, implying |
3301 | that if a padding DIE is used for alignment and the amount needed is | |
3302 | less than SIZEOF_DIE_LENGTH, then the padding DIE has to be big | |
3303 | enough to align to the next alignment boundry. | |
4090fe1c FF |
3304 | |
3305 | We do some basic sanity checking here, such as verifying that the | |
3306 | length of the die would not cause it to overrun the recorded end of | |
3307 | the buffer holding the DIE info. If we find a DIE that is either | |
3308 | too small or too large, we force it's length to zero which should | |
3309 | cause the caller to take appropriate action. | |
35f5886e FF |
3310 | */ |
3311 | ||
3312 | static void | |
95967e73 | 3313 | basicdieinfo (dip, diep, objfile) |
1ab3bf1b JG |
3314 | struct dieinfo *dip; |
3315 | char *diep; | |
95967e73 | 3316 | struct objfile *objfile; |
35f5886e FF |
3317 | { |
3318 | curdie = dip; | |
4ed3a9ea | 3319 | memset (dip, 0, sizeof (struct dieinfo)); |
35f5886e | 3320 | dip -> die = diep; |
13b5a7ff FF |
3321 | dip -> die_ref = dbroff + (diep - dbbase); |
3322 | dip -> die_length = target_to_host (diep, SIZEOF_DIE_LENGTH, GET_UNSIGNED, | |
3323 | objfile); | |
4090fe1c FF |
3324 | if ((dip -> die_length < SIZEOF_DIE_LENGTH) || |
3325 | ((diep + dip -> die_length) > (dbbase + dbsize))) | |
35f5886e | 3326 | { |
13b5a7ff | 3327 | dwarfwarn ("malformed DIE, bad length (%d bytes)", dip -> die_length); |
4090fe1c | 3328 | dip -> die_length = 0; |
35f5886e | 3329 | } |
13b5a7ff | 3330 | else if (dip -> die_length < (SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG)) |
35f5886e | 3331 | { |
13b5a7ff | 3332 | dip -> die_tag = TAG_padding; |
35f5886e FF |
3333 | } |
3334 | else | |
3335 | { | |
13b5a7ff FF |
3336 | diep += SIZEOF_DIE_LENGTH; |
3337 | dip -> die_tag = target_to_host (diep, SIZEOF_DIE_TAG, GET_UNSIGNED, | |
3338 | objfile); | |
35f5886e FF |
3339 | } |
3340 | } | |
3341 | ||
3342 | /* | |
3343 | ||
3344 | LOCAL FUNCTION | |
3345 | ||
3346 | completedieinfo -- finish reading the information for a given DIE | |
3347 | ||
3348 | SYNOPSIS | |
3349 | ||
95967e73 | 3350 | void completedieinfo (struct dieinfo *dip, struct objfile *objfile) |
35f5886e FF |
3351 | |
3352 | DESCRIPTION | |
3353 | ||
3354 | Given a pointer to an already partially initialized die info structure, | |
3355 | scan the raw DIE data and finish filling in the die info structure | |
3356 | from the various attributes found. | |
3357 | ||
3358 | Note that since there is no guarantee that the data is properly | |
3359 | aligned in memory for the type of access required (indirection | |
95967e73 FF |
3360 | through anything other than a char pointer), and there is no |
3361 | guarantee that it is in the same byte order as the gdb host, | |
3362 | we call a function which deals with both alignment and byte | |
3363 | swapping issues. Possibly inefficient, but quite portable. | |
35f5886e FF |
3364 | |
3365 | NOTES | |
3366 | ||
3367 | Each time we are called, we increment the diecount variable, which | |
3368 | keeps an approximate count of the number of dies processed for | |
3369 | each compilation unit. This information is presented to the user | |
3370 | if the info_verbose flag is set. | |
3371 | ||
3372 | */ | |
3373 | ||
3374 | static void | |
95967e73 | 3375 | completedieinfo (dip, objfile) |
1ab3bf1b | 3376 | struct dieinfo *dip; |
95967e73 | 3377 | struct objfile *objfile; |
35f5886e FF |
3378 | { |
3379 | char *diep; /* Current pointer into raw DIE data */ | |
3380 | char *end; /* Terminate DIE scan here */ | |
3381 | unsigned short attr; /* Current attribute being scanned */ | |
3382 | unsigned short form; /* Form of the attribute */ | |
13b5a7ff | 3383 | int nbytes; /* Size of next field to read */ |
35f5886e FF |
3384 | |
3385 | diecount++; | |
3386 | diep = dip -> die; | |
13b5a7ff FF |
3387 | end = diep + dip -> die_length; |
3388 | diep += SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG; | |
35f5886e FF |
3389 | while (diep < end) |
3390 | { | |
13b5a7ff FF |
3391 | attr = target_to_host (diep, SIZEOF_ATTRIBUTE, GET_UNSIGNED, objfile); |
3392 | diep += SIZEOF_ATTRIBUTE; | |
3393 | if ((nbytes = attribute_size (attr)) == -1) | |
3394 | { | |
3395 | SQUAWK (("unknown attribute length, skipped remaining attributes"));; | |
3396 | diep = end; | |
3397 | continue; | |
3398 | } | |
35f5886e FF |
3399 | switch (attr) |
3400 | { | |
3401 | case AT_fund_type: | |
13b5a7ff FF |
3402 | dip -> at_fund_type = target_to_host (diep, nbytes, GET_UNSIGNED, |
3403 | objfile); | |
35f5886e FF |
3404 | break; |
3405 | case AT_ordering: | |
13b5a7ff FF |
3406 | dip -> at_ordering = target_to_host (diep, nbytes, GET_UNSIGNED, |
3407 | objfile); | |
35f5886e FF |
3408 | break; |
3409 | case AT_bit_offset: | |
13b5a7ff FF |
3410 | dip -> at_bit_offset = target_to_host (diep, nbytes, GET_UNSIGNED, |
3411 | objfile); | |
35f5886e | 3412 | break; |
35f5886e | 3413 | case AT_sibling: |
13b5a7ff FF |
3414 | dip -> at_sibling = target_to_host (diep, nbytes, GET_UNSIGNED, |
3415 | objfile); | |
35f5886e FF |
3416 | break; |
3417 | case AT_stmt_list: | |
13b5a7ff FF |
3418 | dip -> at_stmt_list = target_to_host (diep, nbytes, GET_UNSIGNED, |
3419 | objfile); | |
2d6186f4 | 3420 | dip -> has_at_stmt_list = 1; |
35f5886e FF |
3421 | break; |
3422 | case AT_low_pc: | |
13b5a7ff FF |
3423 | dip -> at_low_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3424 | objfile); | |
4d315a07 | 3425 | dip -> at_low_pc += baseaddr; |
2d6186f4 | 3426 | dip -> has_at_low_pc = 1; |
35f5886e FF |
3427 | break; |
3428 | case AT_high_pc: | |
13b5a7ff FF |
3429 | dip -> at_high_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3430 | objfile); | |
4d315a07 | 3431 | dip -> at_high_pc += baseaddr; |
35f5886e FF |
3432 | break; |
3433 | case AT_language: | |
13b5a7ff FF |
3434 | dip -> at_language = target_to_host (diep, nbytes, GET_UNSIGNED, |
3435 | objfile); | |
35f5886e FF |
3436 | break; |
3437 | case AT_user_def_type: | |
13b5a7ff FF |
3438 | dip -> at_user_def_type = target_to_host (diep, nbytes, |
3439 | GET_UNSIGNED, objfile); | |
35f5886e FF |
3440 | break; |
3441 | case AT_byte_size: | |
13b5a7ff FF |
3442 | dip -> at_byte_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3443 | objfile); | |
50055e94 | 3444 | dip -> has_at_byte_size = 1; |
35f5886e FF |
3445 | break; |
3446 | case AT_bit_size: | |
13b5a7ff FF |
3447 | dip -> at_bit_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3448 | objfile); | |
35f5886e FF |
3449 | break; |
3450 | case AT_member: | |
13b5a7ff FF |
3451 | dip -> at_member = target_to_host (diep, nbytes, GET_UNSIGNED, |
3452 | objfile); | |
35f5886e FF |
3453 | break; |
3454 | case AT_discr: | |
13b5a7ff FF |
3455 | dip -> at_discr = target_to_host (diep, nbytes, GET_UNSIGNED, |
3456 | objfile); | |
35f5886e | 3457 | break; |
35f5886e FF |
3458 | case AT_location: |
3459 | dip -> at_location = diep; | |
3460 | break; | |
3461 | case AT_mod_fund_type: | |
3462 | dip -> at_mod_fund_type = diep; | |
3463 | break; | |
3464 | case AT_subscr_data: | |
3465 | dip -> at_subscr_data = diep; | |
3466 | break; | |
3467 | case AT_mod_u_d_type: | |
3468 | dip -> at_mod_u_d_type = diep; | |
3469 | break; | |
35f5886e FF |
3470 | case AT_element_list: |
3471 | dip -> at_element_list = diep; | |
768be6e1 FF |
3472 | dip -> short_element_list = 0; |
3473 | break; | |
3474 | case AT_short_element_list: | |
3475 | dip -> at_element_list = diep; | |
3476 | dip -> short_element_list = 1; | |
35f5886e FF |
3477 | break; |
3478 | case AT_discr_value: | |
3479 | dip -> at_discr_value = diep; | |
3480 | break; | |
3481 | case AT_string_length: | |
3482 | dip -> at_string_length = diep; | |
3483 | break; | |
3484 | case AT_name: | |
3485 | dip -> at_name = diep; | |
3486 | break; | |
3487 | case AT_comp_dir: | |
d4902ab0 FF |
3488 | /* For now, ignore any "hostname:" portion, since gdb doesn't |
3489 | know how to deal with it. (FIXME). */ | |
3490 | dip -> at_comp_dir = strrchr (diep, ':'); | |
3491 | if (dip -> at_comp_dir != NULL) | |
3492 | { | |
3493 | dip -> at_comp_dir++; | |
3494 | } | |
3495 | else | |
3496 | { | |
3497 | dip -> at_comp_dir = diep; | |
3498 | } | |
35f5886e FF |
3499 | break; |
3500 | case AT_producer: | |
3501 | dip -> at_producer = diep; | |
3502 | break; | |
35f5886e | 3503 | case AT_start_scope: |
13b5a7ff FF |
3504 | dip -> at_start_scope = target_to_host (diep, nbytes, GET_UNSIGNED, |
3505 | objfile); | |
35f5886e FF |
3506 | break; |
3507 | case AT_stride_size: | |
13b5a7ff FF |
3508 | dip -> at_stride_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3509 | objfile); | |
35f5886e FF |
3510 | break; |
3511 | case AT_src_info: | |
13b5a7ff FF |
3512 | dip -> at_src_info = target_to_host (diep, nbytes, GET_UNSIGNED, |
3513 | objfile); | |
35f5886e FF |
3514 | break; |
3515 | case AT_prototyped: | |
13b5a7ff | 3516 | dip -> at_prototyped = diep; |
35f5886e | 3517 | break; |
35f5886e FF |
3518 | default: |
3519 | /* Found an attribute that we are unprepared to handle. However | |
3520 | it is specifically one of the design goals of DWARF that | |
3521 | consumers should ignore unknown attributes. As long as the | |
3522 | form is one that we recognize (so we know how to skip it), | |
3523 | we can just ignore the unknown attribute. */ | |
3524 | break; | |
3525 | } | |
13b5a7ff | 3526 | form = FORM_FROM_ATTR (attr); |
35f5886e FF |
3527 | switch (form) |
3528 | { | |
3529 | case FORM_DATA2: | |
13b5a7ff | 3530 | diep += 2; |
35f5886e FF |
3531 | break; |
3532 | case FORM_DATA4: | |
13b5a7ff FF |
3533 | case FORM_REF: |
3534 | diep += 4; | |
35f5886e FF |
3535 | break; |
3536 | case FORM_DATA8: | |
13b5a7ff | 3537 | diep += 8; |
35f5886e FF |
3538 | break; |
3539 | case FORM_ADDR: | |
13b5a7ff | 3540 | diep += TARGET_FT_POINTER_SIZE (objfile); |
35f5886e FF |
3541 | break; |
3542 | case FORM_BLOCK2: | |
13b5a7ff | 3543 | diep += 2 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); |
35f5886e FF |
3544 | break; |
3545 | case FORM_BLOCK4: | |
13b5a7ff | 3546 | diep += 4 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); |
35f5886e FF |
3547 | break; |
3548 | case FORM_STRING: | |
3549 | diep += strlen (diep) + 1; | |
3550 | break; | |
3551 | default: | |
13b5a7ff FF |
3552 | SQUAWK (("unknown attribute form (0x%x)", form)); |
3553 | SQUAWK (("unknown attribute length, skipped remaining attributes"));; | |
35f5886e FF |
3554 | diep = end; |
3555 | break; | |
3556 | } | |
3557 | } | |
3558 | } | |
95967e73 | 3559 | |
13b5a7ff | 3560 | /* |
95967e73 | 3561 | |
13b5a7ff FF |
3562 | LOCAL FUNCTION |
3563 | ||
3564 | target_to_host -- swap in target data to host | |
3565 | ||
3566 | SYNOPSIS | |
3567 | ||
3568 | target_to_host (char *from, int nbytes, int signextend, | |
3569 | struct objfile *objfile) | |
3570 | ||
3571 | DESCRIPTION | |
3572 | ||
3573 | Given pointer to data in target format in FROM, a byte count for | |
3574 | the size of the data in NBYTES, a flag indicating whether or not | |
3575 | the data is signed in SIGNEXTEND, and a pointer to the current | |
3576 | objfile in OBJFILE, convert the data to host format and return | |
3577 | the converted value. | |
3578 | ||
3579 | NOTES | |
3580 | ||
3581 | FIXME: If we read data that is known to be signed, and expect to | |
3582 | use it as signed data, then we need to explicitly sign extend the | |
3583 | result until the bfd library is able to do this for us. | |
3584 | ||
3585 | */ | |
3586 | ||
3587 | static unsigned long | |
3588 | target_to_host (from, nbytes, signextend, objfile) | |
95967e73 FF |
3589 | char *from; |
3590 | int nbytes; | |
13b5a7ff | 3591 | int signextend; /* FIXME: Unused */ |
95967e73 FF |
3592 | struct objfile *objfile; |
3593 | { | |
13b5a7ff | 3594 | unsigned long rtnval; |
95967e73 FF |
3595 | |
3596 | switch (nbytes) | |
3597 | { | |
95967e73 | 3598 | case 8: |
13b5a7ff | 3599 | rtnval = bfd_get_64 (objfile -> obfd, (bfd_byte *) from); |
95967e73 | 3600 | break; |
95967e73 | 3601 | case 4: |
13b5a7ff | 3602 | rtnval = bfd_get_32 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3603 | break; |
3604 | case 2: | |
13b5a7ff | 3605 | rtnval = bfd_get_16 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3606 | break; |
3607 | case 1: | |
13b5a7ff | 3608 | rtnval = bfd_get_8 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3609 | break; |
3610 | default: | |
13b5a7ff FF |
3611 | dwarfwarn ("no bfd support for %d byte data object", nbytes); |
3612 | rtnval = 0; | |
95967e73 FF |
3613 | break; |
3614 | } | |
13b5a7ff | 3615 | return (rtnval); |
95967e73 FF |
3616 | } |
3617 | ||
13b5a7ff FF |
3618 | /* |
3619 | ||
3620 | LOCAL FUNCTION | |
3621 | ||
3622 | attribute_size -- compute size of data for a DWARF attribute | |
3623 | ||
3624 | SYNOPSIS | |
3625 | ||
3626 | static int attribute_size (unsigned int attr) | |
3627 | ||
3628 | DESCRIPTION | |
3629 | ||
3630 | Given a DWARF attribute in ATTR, compute the size of the first | |
3631 | piece of data associated with this attribute and return that | |
3632 | size. | |
3633 | ||
3634 | Returns -1 for unrecognized attributes. | |
3635 | ||
3636 | */ | |
3637 | ||
3638 | static int | |
3639 | attribute_size (attr) | |
3640 | unsigned int attr; | |
3641 | { | |
3642 | int nbytes; /* Size of next data for this attribute */ | |
3643 | unsigned short form; /* Form of the attribute */ | |
3644 | ||
3645 | form = FORM_FROM_ATTR (attr); | |
3646 | switch (form) | |
3647 | { | |
3648 | case FORM_STRING: /* A variable length field is next */ | |
3649 | nbytes = 0; | |
3650 | break; | |
3651 | case FORM_DATA2: /* Next 2 byte field is the data itself */ | |
3652 | case FORM_BLOCK2: /* Next 2 byte field is a block length */ | |
3653 | nbytes = 2; | |
3654 | break; | |
3655 | case FORM_DATA4: /* Next 4 byte field is the data itself */ | |
3656 | case FORM_BLOCK4: /* Next 4 byte field is a block length */ | |
3657 | case FORM_REF: /* Next 4 byte field is a DIE offset */ | |
3658 | nbytes = 4; | |
3659 | break; | |
3660 | case FORM_DATA8: /* Next 8 byte field is the data itself */ | |
3661 | nbytes = 8; | |
3662 | break; | |
3663 | case FORM_ADDR: /* Next field size is target sizeof(void *) */ | |
3664 | nbytes = TARGET_FT_POINTER_SIZE (objfile); | |
3665 | break; | |
3666 | default: | |
3667 | SQUAWK (("unknown attribute form (0x%x)", form)); | |
3668 | nbytes = -1; | |
3669 | break; | |
3670 | } | |
3671 | return (nbytes); | |
3672 | } |