Commit | Line | Data |
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c906108c | 1 | /* DWARF debugging format support for GDB. |
1bac305b AC |
2 | |
3 | Copyright 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, | |
4 | 2000, 2001, 2002, 2003 Free Software Foundation, Inc. | |
5 | ||
c906108c SS |
6 | Written by Fred Fish at Cygnus Support. Portions based on dbxread.c, |
7 | mipsread.c, coffread.c, and dwarfread.c from a Data General SVR4 gdb port. | |
8 | ||
c5aa993b | 9 | This file is part of GDB. |
c906108c | 10 | |
c5aa993b JM |
11 | This program is free software; you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation; either version 2 of the License, or | |
14 | (at your option) any later version. | |
c906108c | 15 | |
c5aa993b JM |
16 | This program is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
c906108c | 20 | |
c5aa993b JM |
21 | You should have received a copy of the GNU General Public License |
22 | along with this program; if not, write to the Free Software | |
23 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
c906108c | 24 | |
5ae7ca1d MC |
25 | /* |
26 | If you are looking for DWARF-2 support, you are in the wrong file. | |
013be872 MC |
27 | Go look in dwarf2read.c. This file is for the original DWARF, |
28 | also known as DWARF-1. | |
29 | ||
30 | DWARF-1 is slowly headed for obsoletion. | |
31 | ||
32 | In gcc HEAD 2003-11-29 16:28:31 UTC, no targets prefer dwarf-1. | |
33 | ||
34 | In gcc 3.3.2, these targets prefer dwarf-1: | |
35 | ||
36 | i[34567]86-sequent-ptx4* | |
37 | i[34567]86-sequent-sysv4* | |
38 | mips-sni-sysv4 | |
39 | sparc-hal-solaris2* | |
40 | ||
41 | In gcc 3.2.2, these targets prefer dwarf-1: | |
42 | ||
43 | i[34567]86-dg-dgux* | |
44 | i[34567]86-sequent-ptx4* | |
45 | i[34567]86-sequent-sysv4* | |
46 | m88k-dg-dgux* | |
47 | mips-sni-sysv4 | |
48 | sparc-hal-solaris2* | |
49 | ||
50 | In gcc 2.95.3, these targets prefer dwarf-1: | |
51 | ||
52 | i[34567]86-dg-dgux* | |
53 | i[34567]86-ncr-sysv4* | |
54 | i[34567]86-sequent-ptx4* | |
55 | i[34567]86-sequent-sysv4* | |
56 | i[34567]86-*-osf1* | |
57 | i[34567]86-*-sco3.2v5* | |
58 | i[34567]86-*-sysv4* | |
59 | i860-alliant-* | |
60 | i860-*-sysv4* | |
61 | m68k-atari-sysv4* | |
62 | m68k-cbm-sysv4* | |
63 | m68k-*-sysv4* | |
64 | m88k-dg-dgux* | |
65 | m88k-*-sysv4* | |
66 | mips-sni-sysv4 | |
67 | mips-*-gnu* | |
68 | sh-*-elf* | |
69 | sh-*-rtemself* | |
70 | sparc-hal-solaris2* | |
71 | sparc-*-sysv4* | |
72 | ||
73 | Some non-gcc compilers produce dwarf-1: | |
74 | ||
75 | PR gdb/1179 was from a user with Diab C++ 4.3. | |
76 | Other users have also reported using Diab compilers with dwarf-1. | |
77 | On 2003-06-09 the gdb list received a report from a user | |
78 | with Absoft ProFortran f77 which is dwarf-1. | |
79 | ||
80 | -- chastain 2003-12-01 | |
5ae7ca1d MC |
81 | */ |
82 | ||
c906108c SS |
83 | /* |
84 | ||
c5aa993b JM |
85 | FIXME: Do we need to generate dependencies in partial symtabs? |
86 | (Perhaps we don't need to). | |
c906108c | 87 | |
c5aa993b JM |
88 | FIXME: Resolve minor differences between what information we put in the |
89 | partial symbol table and what dbxread puts in. For example, we don't yet | |
90 | put enum constants there. And dbxread seems to invent a lot of typedefs | |
91 | we never see. Use the new printpsym command to see the partial symbol table | |
92 | contents. | |
c906108c | 93 | |
c5aa993b JM |
94 | FIXME: Figure out a better way to tell gdb about the name of the function |
95 | contain the user's entry point (I.E. main()) | |
c906108c | 96 | |
c5aa993b JM |
97 | FIXME: See other FIXME's and "ifdef 0" scattered throughout the code for |
98 | other things to work on, if you get bored. :-) | |
c906108c | 99 | |
c5aa993b | 100 | */ |
c906108c SS |
101 | |
102 | #include "defs.h" | |
103 | #include "symtab.h" | |
104 | #include "gdbtypes.h" | |
105 | #include "symfile.h" | |
106 | #include "objfiles.h" | |
107 | #include "elf/dwarf.h" | |
108 | #include "buildsym.h" | |
109 | #include "demangle.h" | |
c5aa993b | 110 | #include "expression.h" /* Needed for enum exp_opcode in language.h, sigh... */ |
c906108c SS |
111 | #include "language.h" |
112 | #include "complaints.h" | |
113 | ||
114 | #include <fcntl.h> | |
115 | #include "gdb_string.h" | |
116 | ||
117 | /* Some macros to provide DIE info for complaints. */ | |
118 | ||
119 | #define DIE_ID (curdie!=NULL ? curdie->die_ref : 0) | |
120 | #define DIE_NAME (curdie!=NULL && curdie->at_name!=NULL) ? curdie->at_name : "" | |
121 | ||
122 | /* Complaints that can be issued during DWARF debug info reading. */ | |
123 | ||
23136709 KB |
124 | static void |
125 | bad_die_ref_complaint (int arg1, const char *arg2, int arg3) | |
c906108c | 126 | { |
23136709 KB |
127 | complaint (&symfile_complaints, |
128 | "DIE @ 0x%x \"%s\", reference to DIE (0x%x) outside compilation unit", | |
129 | arg1, arg2, arg3); | |
130 | } | |
c906108c | 131 | |
23136709 KB |
132 | static void |
133 | unknown_attribute_form_complaint (int arg1, const char *arg2, int arg3) | |
c906108c | 134 | { |
23136709 KB |
135 | complaint (&symfile_complaints, |
136 | "DIE @ 0x%x \"%s\", unknown attribute form (0x%x)", arg1, arg2, | |
137 | arg3); | |
138 | } | |
c906108c | 139 | |
23136709 KB |
140 | static void |
141 | dup_user_type_definition_complaint (int arg1, const char *arg2) | |
c906108c | 142 | { |
23136709 KB |
143 | complaint (&symfile_complaints, |
144 | "DIE @ 0x%x \"%s\", internal error: duplicate user type definition", | |
145 | arg1, arg2); | |
146 | } | |
c906108c | 147 | |
23136709 KB |
148 | static void |
149 | bad_array_element_type_complaint (int arg1, const char *arg2, int arg3) | |
c906108c | 150 | { |
23136709 KB |
151 | complaint (&symfile_complaints, |
152 | "DIE @ 0x%x \"%s\", bad array element type attribute 0x%x", arg1, | |
153 | arg2, arg3); | |
154 | } | |
c906108c SS |
155 | |
156 | typedef unsigned int DIE_REF; /* Reference to a DIE */ | |
157 | ||
158 | #ifndef GCC_PRODUCER | |
159 | #define GCC_PRODUCER "GNU C " | |
160 | #endif | |
161 | ||
162 | #ifndef GPLUS_PRODUCER | |
163 | #define GPLUS_PRODUCER "GNU C++ " | |
164 | #endif | |
165 | ||
166 | #ifndef LCC_PRODUCER | |
167 | #define LCC_PRODUCER "NCR C/C++" | |
168 | #endif | |
169 | ||
c906108c SS |
170 | /* Flags to target_to_host() that tell whether or not the data object is |
171 | expected to be signed. Used, for example, when fetching a signed | |
172 | integer in the target environment which is used as a signed integer | |
173 | in the host environment, and the two environments have different sized | |
174 | ints. In this case, *somebody* has to sign extend the smaller sized | |
175 | int. */ | |
176 | ||
177 | #define GET_UNSIGNED 0 /* No sign extension required */ | |
178 | #define GET_SIGNED 1 /* Sign extension required */ | |
179 | ||
180 | /* Defines for things which are specified in the document "DWARF Debugging | |
181 | Information Format" published by UNIX International, Programming Languages | |
182 | SIG. These defines are based on revision 1.0.0, Jan 20, 1992. */ | |
183 | ||
184 | #define SIZEOF_DIE_LENGTH 4 | |
185 | #define SIZEOF_DIE_TAG 2 | |
186 | #define SIZEOF_ATTRIBUTE 2 | |
187 | #define SIZEOF_FORMAT_SPECIFIER 1 | |
188 | #define SIZEOF_FMT_FT 2 | |
189 | #define SIZEOF_LINETBL_LENGTH 4 | |
190 | #define SIZEOF_LINETBL_LINENO 4 | |
191 | #define SIZEOF_LINETBL_STMT 2 | |
192 | #define SIZEOF_LINETBL_DELTA 4 | |
193 | #define SIZEOF_LOC_ATOM_CODE 1 | |
194 | ||
195 | #define FORM_FROM_ATTR(attr) ((attr) & 0xF) /* Implicitly specified */ | |
196 | ||
197 | /* Macros that return the sizes of various types of data in the target | |
198 | environment. | |
199 | ||
200 | FIXME: Currently these are just compile time constants (as they are in | |
201 | other parts of gdb as well). They need to be able to get the right size | |
202 | either from the bfd or possibly from the DWARF info. It would be nice if | |
203 | the DWARF producer inserted DIES that describe the fundamental types in | |
204 | the target environment into the DWARF info, similar to the way dbx stabs | |
205 | producers produce information about their fundamental types. */ | |
206 | ||
207 | #define TARGET_FT_POINTER_SIZE(objfile) (TARGET_PTR_BIT / TARGET_CHAR_BIT) | |
208 | #define TARGET_FT_LONG_SIZE(objfile) (TARGET_LONG_BIT / TARGET_CHAR_BIT) | |
209 | ||
210 | /* The Amiga SVR4 header file <dwarf.h> defines AT_element_list as a | |
211 | FORM_BLOCK2, and this is the value emitted by the AT&T compiler. | |
212 | However, the Issue 2 DWARF specification from AT&T defines it as | |
213 | a FORM_BLOCK4, as does the latest specification from UI/PLSIG. | |
214 | For backwards compatibility with the AT&T compiler produced executables | |
215 | we define AT_short_element_list for this variant. */ | |
216 | ||
217 | #define AT_short_element_list (0x00f0|FORM_BLOCK2) | |
218 | ||
c906108c SS |
219 | /* The DWARF debugging information consists of two major pieces, |
220 | one is a block of DWARF Information Entries (DIE's) and the other | |
221 | is a line number table. The "struct dieinfo" structure contains | |
222 | the information for a single DIE, the one currently being processed. | |
223 | ||
224 | In order to make it easier to randomly access the attribute fields | |
225 | of the current DIE, which are specifically unordered within the DIE, | |
226 | each DIE is scanned and an instance of the "struct dieinfo" | |
227 | structure is initialized. | |
228 | ||
229 | Initialization is done in two levels. The first, done by basicdieinfo(), | |
230 | just initializes those fields that are vital to deciding whether or not | |
231 | to use this DIE, how to skip past it, etc. The second, done by the | |
232 | function completedieinfo(), fills in the rest of the information. | |
233 | ||
234 | Attributes which have block forms are not interpreted at the time | |
235 | the DIE is scanned, instead we just save pointers to the start | |
236 | of their value fields. | |
237 | ||
238 | Some fields have a flag <name>_p that is set when the value of the | |
239 | field is valid (I.E. we found a matching attribute in the DIE). Since | |
240 | we may want to test for the presence of some attributes in the DIE, | |
241 | such as AT_low_pc, without restricting the values of the field, | |
242 | we need someway to note that we found such an attribute. | |
c5aa993b | 243 | |
c906108c | 244 | */ |
c5aa993b | 245 | |
c906108c SS |
246 | typedef char BLOCK; |
247 | ||
c5aa993b JM |
248 | struct dieinfo |
249 | { | |
250 | char *die; /* Pointer to the raw DIE data */ | |
251 | unsigned long die_length; /* Length of the raw DIE data */ | |
252 | DIE_REF die_ref; /* Offset of this DIE */ | |
253 | unsigned short die_tag; /* Tag for this DIE */ | |
254 | unsigned long at_padding; | |
255 | unsigned long at_sibling; | |
256 | BLOCK *at_location; | |
257 | char *at_name; | |
258 | unsigned short at_fund_type; | |
259 | BLOCK *at_mod_fund_type; | |
260 | unsigned long at_user_def_type; | |
261 | BLOCK *at_mod_u_d_type; | |
262 | unsigned short at_ordering; | |
263 | BLOCK *at_subscr_data; | |
264 | unsigned long at_byte_size; | |
265 | unsigned short at_bit_offset; | |
266 | unsigned long at_bit_size; | |
267 | BLOCK *at_element_list; | |
268 | unsigned long at_stmt_list; | |
269 | CORE_ADDR at_low_pc; | |
270 | CORE_ADDR at_high_pc; | |
271 | unsigned long at_language; | |
272 | unsigned long at_member; | |
273 | unsigned long at_discr; | |
274 | BLOCK *at_discr_value; | |
275 | BLOCK *at_string_length; | |
276 | char *at_comp_dir; | |
277 | char *at_producer; | |
278 | unsigned long at_start_scope; | |
279 | unsigned long at_stride_size; | |
280 | unsigned long at_src_info; | |
281 | char *at_prototyped; | |
282 | unsigned int has_at_low_pc:1; | |
283 | unsigned int has_at_stmt_list:1; | |
284 | unsigned int has_at_byte_size:1; | |
285 | unsigned int short_element_list:1; | |
286 | ||
287 | /* Kludge to identify register variables */ | |
288 | ||
289 | unsigned int isreg; | |
290 | ||
291 | /* Kludge to identify optimized out variables */ | |
292 | ||
293 | unsigned int optimized_out; | |
294 | ||
295 | /* Kludge to identify basereg references. | |
296 | Nonzero if we have an offset relative to a basereg. */ | |
297 | ||
298 | unsigned int offreg; | |
299 | ||
300 | /* Kludge to identify which base register is it relative to. */ | |
301 | ||
302 | unsigned int basereg; | |
303 | }; | |
c906108c | 304 | |
c5aa993b | 305 | static int diecount; /* Approximate count of dies for compilation unit */ |
c906108c SS |
306 | static struct dieinfo *curdie; /* For warnings and such */ |
307 | ||
c5aa993b JM |
308 | static char *dbbase; /* Base pointer to dwarf info */ |
309 | static int dbsize; /* Size of dwarf info in bytes */ | |
310 | static int dbroff; /* Relative offset from start of .debug section */ | |
311 | static char *lnbase; /* Base pointer to line section */ | |
c906108c SS |
312 | |
313 | /* This value is added to each symbol value. FIXME: Generalize to | |
314 | the section_offsets structure used by dbxread (once this is done, | |
315 | pass the appropriate section number to end_symtab). */ | |
316 | static CORE_ADDR baseaddr; /* Add to each symbol value */ | |
317 | ||
318 | /* The section offsets used in the current psymtab or symtab. FIXME, | |
319 | only used to pass one value (baseaddr) at the moment. */ | |
320 | static struct section_offsets *base_section_offsets; | |
321 | ||
322 | /* We put a pointer to this structure in the read_symtab_private field | |
323 | of the psymtab. */ | |
324 | ||
c5aa993b JM |
325 | struct dwfinfo |
326 | { | |
327 | /* Always the absolute file offset to the start of the ".debug" | |
328 | section for the file containing the DIE's being accessed. */ | |
329 | file_ptr dbfoff; | |
330 | /* Relative offset from the start of the ".debug" section to the | |
331 | first DIE to be accessed. When building the partial symbol | |
332 | table, this value will be zero since we are accessing the | |
333 | entire ".debug" section. When expanding a partial symbol | |
334 | table entry, this value will be the offset to the first | |
335 | DIE for the compilation unit containing the symbol that | |
336 | triggers the expansion. */ | |
337 | int dbroff; | |
338 | /* The size of the chunk of DIE's being examined, in bytes. */ | |
339 | int dblength; | |
340 | /* The absolute file offset to the line table fragment. Ignored | |
341 | when building partial symbol tables, but used when expanding | |
342 | them, and contains the absolute file offset to the fragment | |
343 | of the ".line" section containing the line numbers for the | |
344 | current compilation unit. */ | |
345 | file_ptr lnfoff; | |
346 | }; | |
c906108c SS |
347 | |
348 | #define DBFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbfoff) | |
349 | #define DBROFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbroff) | |
350 | #define DBLENGTH(p) (((struct dwfinfo *)((p)->read_symtab_private))->dblength) | |
351 | #define LNFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->lnfoff) | |
352 | ||
353 | /* The generic symbol table building routines have separate lists for | |
354 | file scope symbols and all all other scopes (local scopes). So | |
355 | we need to select the right one to pass to add_symbol_to_list(). | |
356 | We do it by keeping a pointer to the correct list in list_in_scope. | |
357 | ||
358 | FIXME: The original dwarf code just treated the file scope as the first | |
359 | local scope, and all other local scopes as nested local scopes, and worked | |
360 | fine. Check to see if we really need to distinguish these in buildsym.c */ | |
361 | ||
362 | struct pending **list_in_scope = &file_symbols; | |
363 | ||
364 | /* DIES which have user defined types or modified user defined types refer to | |
365 | other DIES for the type information. Thus we need to associate the offset | |
366 | of a DIE for a user defined type with a pointer to the type information. | |
367 | ||
368 | Originally this was done using a simple but expensive algorithm, with an | |
369 | array of unsorted structures, each containing an offset/type-pointer pair. | |
370 | This array was scanned linearly each time a lookup was done. The result | |
371 | was that gdb was spending over half it's startup time munging through this | |
372 | array of pointers looking for a structure that had the right offset member. | |
373 | ||
374 | The second attempt used the same array of structures, but the array was | |
375 | sorted using qsort each time a new offset/type was recorded, and a binary | |
376 | search was used to find the type pointer for a given DIE offset. This was | |
377 | even slower, due to the overhead of sorting the array each time a new | |
378 | offset/type pair was entered. | |
379 | ||
380 | The third attempt uses a fixed size array of type pointers, indexed by a | |
381 | value derived from the DIE offset. Since the minimum DIE size is 4 bytes, | |
382 | we can divide any DIE offset by 4 to obtain a unique index into this fixed | |
383 | size array. Since each element is a 4 byte pointer, it takes exactly as | |
384 | much memory to hold this array as to hold the DWARF info for a given | |
385 | compilation unit. But it gets freed as soon as we are done with it. | |
386 | This has worked well in practice, as a reasonable tradeoff between memory | |
387 | consumption and speed, without having to resort to much more complicated | |
388 | algorithms. */ | |
389 | ||
390 | static struct type **utypes; /* Pointer to array of user type pointers */ | |
391 | static int numutypes; /* Max number of user type pointers */ | |
392 | ||
393 | /* Maintain an array of referenced fundamental types for the current | |
394 | compilation unit being read. For DWARF version 1, we have to construct | |
395 | the fundamental types on the fly, since no information about the | |
396 | fundamental types is supplied. Each such fundamental type is created by | |
397 | calling a language dependent routine to create the type, and then a | |
398 | pointer to that type is then placed in the array at the index specified | |
399 | by it's FT_<TYPENAME> value. The array has a fixed size set by the | |
400 | FT_NUM_MEMBERS compile time constant, which is the number of predefined | |
401 | fundamental types gdb knows how to construct. */ | |
402 | ||
c5aa993b | 403 | static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */ |
c906108c SS |
404 | |
405 | /* Record the language for the compilation unit which is currently being | |
406 | processed. We know it once we have seen the TAG_compile_unit DIE, | |
407 | and we need it while processing the DIE's for that compilation unit. | |
408 | It is eventually saved in the symtab structure, but we don't finalize | |
409 | the symtab struct until we have processed all the DIE's for the | |
410 | compilation unit. We also need to get and save a pointer to the | |
411 | language struct for this language, so we can call the language | |
412 | dependent routines for doing things such as creating fundamental | |
413 | types. */ | |
414 | ||
415 | static enum language cu_language; | |
416 | static const struct language_defn *cu_language_defn; | |
417 | ||
418 | /* Forward declarations of static functions so we don't have to worry | |
419 | about ordering within this file. */ | |
420 | ||
4efb68b1 | 421 | static void free_utypes (void *); |
c906108c | 422 | |
a14ed312 | 423 | static int attribute_size (unsigned int); |
c906108c | 424 | |
a14ed312 | 425 | static CORE_ADDR target_to_host (char *, int, int, struct objfile *); |
c906108c | 426 | |
a14ed312 | 427 | static void add_enum_psymbol (struct dieinfo *, struct objfile *); |
c906108c | 428 | |
a14ed312 | 429 | static void handle_producer (char *); |
c906108c | 430 | |
570b8f7c AC |
431 | static void read_file_scope (struct dieinfo *, char *, char *, |
432 | struct objfile *); | |
c906108c | 433 | |
570b8f7c AC |
434 | static void read_func_scope (struct dieinfo *, char *, char *, |
435 | struct objfile *); | |
c906108c | 436 | |
570b8f7c AC |
437 | static void read_lexical_block_scope (struct dieinfo *, char *, char *, |
438 | struct objfile *); | |
c906108c | 439 | |
a14ed312 | 440 | static void scan_partial_symbols (char *, char *, struct objfile *); |
c906108c | 441 | |
570b8f7c AC |
442 | static void scan_compilation_units (char *, char *, file_ptr, file_ptr, |
443 | struct objfile *); | |
c906108c | 444 | |
a14ed312 | 445 | static void add_partial_symbol (struct dieinfo *, struct objfile *); |
c906108c | 446 | |
a14ed312 | 447 | static void basicdieinfo (struct dieinfo *, char *, struct objfile *); |
c906108c | 448 | |
a14ed312 | 449 | static void completedieinfo (struct dieinfo *, struct objfile *); |
c906108c | 450 | |
a14ed312 | 451 | static void dwarf_psymtab_to_symtab (struct partial_symtab *); |
c906108c | 452 | |
a14ed312 | 453 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 454 | |
a14ed312 | 455 | static void read_ofile_symtab (struct partial_symtab *); |
c906108c | 456 | |
a14ed312 | 457 | static void process_dies (char *, char *, struct objfile *); |
c906108c | 458 | |
570b8f7c AC |
459 | static void read_structure_scope (struct dieinfo *, char *, char *, |
460 | struct objfile *); | |
c906108c | 461 | |
a14ed312 | 462 | static struct type *decode_array_element_type (char *); |
c906108c | 463 | |
a14ed312 | 464 | static struct type *decode_subscript_data_item (char *, char *); |
c906108c | 465 | |
a14ed312 | 466 | static void dwarf_read_array_type (struct dieinfo *); |
c906108c | 467 | |
a14ed312 | 468 | static void read_tag_pointer_type (struct dieinfo *dip); |
c906108c | 469 | |
a14ed312 | 470 | static void read_tag_string_type (struct dieinfo *dip); |
c906108c | 471 | |
a14ed312 | 472 | static void read_subroutine_type (struct dieinfo *, char *, char *); |
c906108c | 473 | |
570b8f7c AC |
474 | static void read_enumeration (struct dieinfo *, char *, char *, |
475 | struct objfile *); | |
c906108c | 476 | |
a14ed312 KB |
477 | static struct type *struct_type (struct dieinfo *, char *, char *, |
478 | struct objfile *); | |
c906108c | 479 | |
a14ed312 | 480 | static struct type *enum_type (struct dieinfo *, struct objfile *); |
c906108c | 481 | |
a14ed312 | 482 | static void decode_line_numbers (char *); |
c906108c | 483 | |
a14ed312 | 484 | static struct type *decode_die_type (struct dieinfo *); |
c906108c | 485 | |
a14ed312 | 486 | static struct type *decode_mod_fund_type (char *); |
c906108c | 487 | |
a14ed312 | 488 | static struct type *decode_mod_u_d_type (char *); |
c906108c | 489 | |
a14ed312 | 490 | static struct type *decode_modified_type (char *, unsigned int, int); |
c906108c | 491 | |
a14ed312 | 492 | static struct type *decode_fund_type (unsigned int); |
c906108c | 493 | |
a14ed312 | 494 | static char *create_name (char *, struct obstack *); |
c906108c | 495 | |
a14ed312 | 496 | static struct type *lookup_utype (DIE_REF); |
c906108c | 497 | |
a14ed312 | 498 | static struct type *alloc_utype (DIE_REF, struct type *); |
c906108c | 499 | |
a14ed312 | 500 | static struct symbol *new_symbol (struct dieinfo *, struct objfile *); |
c906108c | 501 | |
570b8f7c AC |
502 | static void synthesize_typedef (struct dieinfo *, struct objfile *, |
503 | struct type *); | |
c906108c | 504 | |
a14ed312 | 505 | static int locval (struct dieinfo *); |
c906108c | 506 | |
a14ed312 | 507 | static void set_cu_language (struct dieinfo *); |
c906108c | 508 | |
a14ed312 | 509 | static struct type *dwarf_fundamental_type (struct objfile *, int); |
c906108c SS |
510 | |
511 | ||
512 | /* | |
513 | ||
c5aa993b | 514 | LOCAL FUNCTION |
c906108c | 515 | |
c5aa993b | 516 | dwarf_fundamental_type -- lookup or create a fundamental type |
c906108c | 517 | |
c5aa993b | 518 | SYNOPSIS |
c906108c | 519 | |
c5aa993b JM |
520 | struct type * |
521 | dwarf_fundamental_type (struct objfile *objfile, int typeid) | |
c906108c | 522 | |
c5aa993b | 523 | DESCRIPTION |
c906108c | 524 | |
c5aa993b JM |
525 | DWARF version 1 doesn't supply any fundamental type information, |
526 | so gdb has to construct such types. It has a fixed number of | |
527 | fundamental types that it knows how to construct, which is the | |
528 | union of all types that it knows how to construct for all languages | |
529 | that it knows about. These are enumerated in gdbtypes.h. | |
c906108c | 530 | |
c5aa993b JM |
531 | As an example, assume we find a DIE that references a DWARF |
532 | fundamental type of FT_integer. We first look in the ftypes | |
533 | array to see if we already have such a type, indexed by the | |
534 | gdb internal value of FT_INTEGER. If so, we simply return a | |
535 | pointer to that type. If not, then we ask an appropriate | |
536 | language dependent routine to create a type FT_INTEGER, using | |
537 | defaults reasonable for the current target machine, and install | |
538 | that type in ftypes for future reference. | |
c906108c | 539 | |
c5aa993b | 540 | RETURNS |
c906108c | 541 | |
c5aa993b | 542 | Pointer to a fundamental type. |
c906108c | 543 | |
c5aa993b | 544 | */ |
c906108c SS |
545 | |
546 | static struct type * | |
fba45db2 | 547 | dwarf_fundamental_type (struct objfile *objfile, int typeid) |
c906108c SS |
548 | { |
549 | if (typeid < 0 || typeid >= FT_NUM_MEMBERS) | |
550 | { | |
551 | error ("internal error - invalid fundamental type id %d", typeid); | |
552 | } | |
553 | ||
554 | /* Look for this particular type in the fundamental type vector. If one is | |
555 | not found, create and install one appropriate for the current language | |
556 | and the current target machine. */ | |
557 | ||
558 | if (ftypes[typeid] == NULL) | |
559 | { | |
c5aa993b | 560 | ftypes[typeid] = cu_language_defn->la_fund_type (objfile, typeid); |
c906108c SS |
561 | } |
562 | ||
563 | return (ftypes[typeid]); | |
564 | } | |
565 | ||
566 | /* | |
567 | ||
c5aa993b | 568 | LOCAL FUNCTION |
c906108c | 569 | |
c5aa993b | 570 | set_cu_language -- set local copy of language for compilation unit |
c906108c | 571 | |
c5aa993b | 572 | SYNOPSIS |
c906108c | 573 | |
c5aa993b JM |
574 | void |
575 | set_cu_language (struct dieinfo *dip) | |
c906108c | 576 | |
c5aa993b | 577 | DESCRIPTION |
c906108c | 578 | |
c5aa993b JM |
579 | Decode the language attribute for a compilation unit DIE and |
580 | remember what the language was. We use this at various times | |
581 | when processing DIE's for a given compilation unit. | |
c906108c | 582 | |
c5aa993b | 583 | RETURNS |
c906108c | 584 | |
c5aa993b | 585 | No return value. |
c906108c SS |
586 | |
587 | */ | |
588 | ||
589 | static void | |
fba45db2 | 590 | set_cu_language (struct dieinfo *dip) |
c906108c | 591 | { |
c5aa993b | 592 | switch (dip->at_language) |
c906108c | 593 | { |
c5aa993b JM |
594 | case LANG_C89: |
595 | case LANG_C: | |
596 | cu_language = language_c; | |
597 | break; | |
598 | case LANG_C_PLUS_PLUS: | |
599 | cu_language = language_cplus; | |
600 | break; | |
c5aa993b JM |
601 | case LANG_MODULA2: |
602 | cu_language = language_m2; | |
603 | break; | |
604 | case LANG_FORTRAN77: | |
605 | case LANG_FORTRAN90: | |
606 | cu_language = language_fortran; | |
607 | break; | |
608 | case LANG_ADA83: | |
609 | case LANG_COBOL74: | |
610 | case LANG_COBOL85: | |
611 | case LANG_PASCAL83: | |
612 | /* We don't know anything special about these yet. */ | |
613 | cu_language = language_unknown; | |
614 | break; | |
615 | default: | |
616 | /* If no at_language, try to deduce one from the filename */ | |
617 | cu_language = deduce_language_from_filename (dip->at_name); | |
618 | break; | |
c906108c SS |
619 | } |
620 | cu_language_defn = language_def (cu_language); | |
621 | } | |
622 | ||
623 | /* | |
624 | ||
c5aa993b | 625 | GLOBAL FUNCTION |
c906108c | 626 | |
c5aa993b | 627 | dwarf_build_psymtabs -- build partial symtabs from DWARF debug info |
c906108c | 628 | |
c5aa993b | 629 | SYNOPSIS |
c906108c | 630 | |
c5aa993b | 631 | void dwarf_build_psymtabs (struct objfile *objfile, |
c5aa993b JM |
632 | int mainline, file_ptr dbfoff, unsigned int dbfsize, |
633 | file_ptr lnoffset, unsigned int lnsize) | |
c906108c | 634 | |
c5aa993b | 635 | DESCRIPTION |
c906108c | 636 | |
c5aa993b JM |
637 | This function is called upon to build partial symtabs from files |
638 | containing DIE's (Dwarf Information Entries) and DWARF line numbers. | |
c906108c | 639 | |
c5aa993b JM |
640 | It is passed a bfd* containing the DIES |
641 | and line number information, the corresponding filename for that | |
642 | file, a base address for relocating the symbols, a flag indicating | |
643 | whether or not this debugging information is from a "main symbol | |
644 | table" rather than a shared library or dynamically linked file, | |
645 | and file offset/size pairs for the DIE information and line number | |
646 | information. | |
c906108c | 647 | |
c5aa993b | 648 | RETURNS |
c906108c | 649 | |
c5aa993b | 650 | No return value. |
c906108c SS |
651 | |
652 | */ | |
653 | ||
654 | void | |
fba45db2 KB |
655 | dwarf_build_psymtabs (struct objfile *objfile, int mainline, file_ptr dbfoff, |
656 | unsigned int dbfsize, file_ptr lnoffset, | |
657 | unsigned int lnsize) | |
c906108c SS |
658 | { |
659 | bfd *abfd = objfile->obfd; | |
660 | struct cleanup *back_to; | |
c5aa993b | 661 | |
c906108c SS |
662 | current_objfile = objfile; |
663 | dbsize = dbfsize; | |
664 | dbbase = xmalloc (dbsize); | |
665 | dbroff = 0; | |
666 | if ((bfd_seek (abfd, dbfoff, SEEK_SET) != 0) || | |
3a42e9d0 | 667 | (bfd_bread (dbbase, dbsize, abfd) != dbsize)) |
c906108c | 668 | { |
b8c9b27d | 669 | xfree (dbbase); |
c906108c SS |
670 | error ("can't read DWARF data from '%s'", bfd_get_filename (abfd)); |
671 | } | |
b8c9b27d | 672 | back_to = make_cleanup (xfree, dbbase); |
c5aa993b | 673 | |
c906108c SS |
674 | /* If we are reinitializing, or if we have never loaded syms yet, init. |
675 | Since we have no idea how many DIES we are looking at, we just guess | |
676 | some arbitrary value. */ | |
c5aa993b | 677 | |
ef96bde8 EZ |
678 | if (mainline |
679 | || (objfile->global_psymbols.size == 0 | |
680 | && objfile->static_psymbols.size == 0)) | |
c906108c SS |
681 | { |
682 | init_psymbol_list (objfile, 1024); | |
683 | } | |
c5aa993b | 684 | |
c906108c SS |
685 | /* Save the relocation factor where everybody can see it. */ |
686 | ||
d4f3574e SS |
687 | base_section_offsets = objfile->section_offsets; |
688 | baseaddr = ANOFFSET (objfile->section_offsets, 0); | |
c906108c SS |
689 | |
690 | /* Follow the compilation unit sibling chain, building a partial symbol | |
691 | table entry for each one. Save enough information about each compilation | |
692 | unit to locate the full DWARF information later. */ | |
c5aa993b | 693 | |
c906108c | 694 | scan_compilation_units (dbbase, dbbase + dbsize, dbfoff, lnoffset, objfile); |
c5aa993b | 695 | |
c906108c SS |
696 | do_cleanups (back_to); |
697 | current_objfile = NULL; | |
698 | } | |
699 | ||
700 | /* | |
701 | ||
c5aa993b | 702 | LOCAL FUNCTION |
c906108c | 703 | |
c5aa993b | 704 | read_lexical_block_scope -- process all dies in a lexical block |
c906108c | 705 | |
c5aa993b | 706 | SYNOPSIS |
c906108c | 707 | |
c5aa993b JM |
708 | static void read_lexical_block_scope (struct dieinfo *dip, |
709 | char *thisdie, char *enddie) | |
c906108c | 710 | |
c5aa993b | 711 | DESCRIPTION |
c906108c | 712 | |
c5aa993b JM |
713 | Process all the DIES contained within a lexical block scope. |
714 | Start a new scope, process the dies, and then close the scope. | |
c906108c SS |
715 | |
716 | */ | |
717 | ||
718 | static void | |
fba45db2 KB |
719 | read_lexical_block_scope (struct dieinfo *dip, char *thisdie, char *enddie, |
720 | struct objfile *objfile) | |
c906108c | 721 | { |
b59661bd | 722 | struct context_stack *new; |
c906108c | 723 | |
c5aa993b JM |
724 | push_context (0, dip->at_low_pc); |
725 | process_dies (thisdie + dip->die_length, enddie, objfile); | |
c906108c SS |
726 | new = pop_context (); |
727 | if (local_symbols != NULL) | |
728 | { | |
c5aa993b JM |
729 | finish_block (0, &local_symbols, new->old_blocks, new->start_addr, |
730 | dip->at_high_pc, objfile); | |
c906108c | 731 | } |
c5aa993b | 732 | local_symbols = new->locals; |
c906108c SS |
733 | } |
734 | ||
735 | /* | |
736 | ||
c5aa993b | 737 | LOCAL FUNCTION |
c906108c | 738 | |
c5aa993b | 739 | lookup_utype -- look up a user defined type from die reference |
c906108c | 740 | |
c5aa993b | 741 | SYNOPSIS |
c906108c | 742 | |
c5aa993b | 743 | static type *lookup_utype (DIE_REF die_ref) |
c906108c | 744 | |
c5aa993b | 745 | DESCRIPTION |
c906108c | 746 | |
c5aa993b JM |
747 | Given a DIE reference, lookup the user defined type associated with |
748 | that DIE, if it has been registered already. If not registered, then | |
749 | return NULL. Alloc_utype() can be called to register an empty | |
750 | type for this reference, which will be filled in later when the | |
751 | actual referenced DIE is processed. | |
c906108c SS |
752 | */ |
753 | ||
754 | static struct type * | |
fba45db2 | 755 | lookup_utype (DIE_REF die_ref) |
c906108c SS |
756 | { |
757 | struct type *type = NULL; | |
758 | int utypeidx; | |
c5aa993b | 759 | |
c906108c SS |
760 | utypeidx = (die_ref - dbroff) / 4; |
761 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
762 | { | |
23136709 | 763 | bad_die_ref_complaint (DIE_ID, DIE_NAME, die_ref); |
c906108c SS |
764 | } |
765 | else | |
766 | { | |
767 | type = *(utypes + utypeidx); | |
768 | } | |
769 | return (type); | |
770 | } | |
771 | ||
772 | ||
773 | /* | |
774 | ||
c5aa993b | 775 | LOCAL FUNCTION |
c906108c | 776 | |
c5aa993b | 777 | alloc_utype -- add a user defined type for die reference |
c906108c | 778 | |
c5aa993b | 779 | SYNOPSIS |
c906108c | 780 | |
c5aa993b | 781 | static type *alloc_utype (DIE_REF die_ref, struct type *utypep) |
c906108c | 782 | |
c5aa993b | 783 | DESCRIPTION |
c906108c | 784 | |
c5aa993b JM |
785 | Given a die reference DIE_REF, and a possible pointer to a user |
786 | defined type UTYPEP, register that this reference has a user | |
787 | defined type and either use the specified type in UTYPEP or | |
788 | make a new empty type that will be filled in later. | |
c906108c | 789 | |
c5aa993b JM |
790 | We should only be called after calling lookup_utype() to verify that |
791 | there is not currently a type registered for DIE_REF. | |
c906108c SS |
792 | */ |
793 | ||
794 | static struct type * | |
fba45db2 | 795 | alloc_utype (DIE_REF die_ref, struct type *utypep) |
c906108c SS |
796 | { |
797 | struct type **typep; | |
798 | int utypeidx; | |
c5aa993b | 799 | |
c906108c SS |
800 | utypeidx = (die_ref - dbroff) / 4; |
801 | typep = utypes + utypeidx; | |
802 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
803 | { | |
804 | utypep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
23136709 | 805 | bad_die_ref_complaint (DIE_ID, DIE_NAME, die_ref); |
c906108c SS |
806 | } |
807 | else if (*typep != NULL) | |
808 | { | |
809 | utypep = *typep; | |
23136709 KB |
810 | complaint (&symfile_complaints, |
811 | "DIE @ 0x%x \"%s\", internal error: duplicate user type allocation", | |
812 | DIE_ID, DIE_NAME); | |
c906108c SS |
813 | } |
814 | else | |
815 | { | |
816 | if (utypep == NULL) | |
817 | { | |
818 | utypep = alloc_type (current_objfile); | |
819 | } | |
820 | *typep = utypep; | |
821 | } | |
822 | return (utypep); | |
823 | } | |
824 | ||
825 | /* | |
826 | ||
c5aa993b | 827 | LOCAL FUNCTION |
c906108c | 828 | |
c5aa993b | 829 | free_utypes -- free the utypes array and reset pointer & count |
c906108c | 830 | |
c5aa993b | 831 | SYNOPSIS |
c906108c | 832 | |
4efb68b1 | 833 | static void free_utypes (void *dummy) |
c906108c | 834 | |
c5aa993b | 835 | DESCRIPTION |
c906108c | 836 | |
c5aa993b JM |
837 | Called via do_cleanups to free the utypes array, reset the pointer to NULL, |
838 | and set numutypes back to zero. This ensures that the utypes does not get | |
839 | referenced after being freed. | |
c906108c SS |
840 | */ |
841 | ||
842 | static void | |
4efb68b1 | 843 | free_utypes (void *dummy) |
c906108c | 844 | { |
b8c9b27d | 845 | xfree (utypes); |
c906108c SS |
846 | utypes = NULL; |
847 | numutypes = 0; | |
848 | } | |
849 | ||
850 | ||
851 | /* | |
852 | ||
c5aa993b | 853 | LOCAL FUNCTION |
c906108c | 854 | |
c5aa993b | 855 | decode_die_type -- return a type for a specified die |
c906108c | 856 | |
c5aa993b | 857 | SYNOPSIS |
c906108c | 858 | |
c5aa993b | 859 | static struct type *decode_die_type (struct dieinfo *dip) |
c906108c | 860 | |
c5aa993b | 861 | DESCRIPTION |
c906108c | 862 | |
c5aa993b JM |
863 | Given a pointer to a die information structure DIP, decode the |
864 | type of the die and return a pointer to the decoded type. All | |
865 | dies without specific types default to type int. | |
c906108c SS |
866 | */ |
867 | ||
868 | static struct type * | |
fba45db2 | 869 | decode_die_type (struct dieinfo *dip) |
c906108c SS |
870 | { |
871 | struct type *type = NULL; | |
c5aa993b JM |
872 | |
873 | if (dip->at_fund_type != 0) | |
c906108c | 874 | { |
c5aa993b | 875 | type = decode_fund_type (dip->at_fund_type); |
c906108c | 876 | } |
c5aa993b | 877 | else if (dip->at_mod_fund_type != NULL) |
c906108c | 878 | { |
c5aa993b | 879 | type = decode_mod_fund_type (dip->at_mod_fund_type); |
c906108c | 880 | } |
c5aa993b | 881 | else if (dip->at_user_def_type) |
c906108c | 882 | { |
b59661bd AC |
883 | type = lookup_utype (dip->at_user_def_type); |
884 | if (type == NULL) | |
c906108c | 885 | { |
c5aa993b | 886 | type = alloc_utype (dip->at_user_def_type, NULL); |
c906108c SS |
887 | } |
888 | } | |
c5aa993b | 889 | else if (dip->at_mod_u_d_type) |
c906108c | 890 | { |
c5aa993b | 891 | type = decode_mod_u_d_type (dip->at_mod_u_d_type); |
c906108c SS |
892 | } |
893 | else | |
894 | { | |
895 | type = dwarf_fundamental_type (current_objfile, FT_VOID); | |
896 | } | |
897 | return (type); | |
898 | } | |
899 | ||
900 | /* | |
901 | ||
c5aa993b | 902 | LOCAL FUNCTION |
c906108c | 903 | |
c5aa993b | 904 | struct_type -- compute and return the type for a struct or union |
c906108c | 905 | |
c5aa993b | 906 | SYNOPSIS |
c906108c | 907 | |
c5aa993b JM |
908 | static struct type *struct_type (struct dieinfo *dip, char *thisdie, |
909 | char *enddie, struct objfile *objfile) | |
c906108c | 910 | |
c5aa993b | 911 | DESCRIPTION |
c906108c | 912 | |
c5aa993b JM |
913 | Given pointer to a die information structure for a die which |
914 | defines a union or structure (and MUST define one or the other), | |
915 | and pointers to the raw die data that define the range of dies which | |
916 | define the members, compute and return the user defined type for the | |
917 | structure or union. | |
c906108c SS |
918 | */ |
919 | ||
920 | static struct type * | |
fba45db2 KB |
921 | struct_type (struct dieinfo *dip, char *thisdie, char *enddie, |
922 | struct objfile *objfile) | |
c906108c SS |
923 | { |
924 | struct type *type; | |
c5aa993b JM |
925 | struct nextfield |
926 | { | |
927 | struct nextfield *next; | |
928 | struct field field; | |
929 | }; | |
c906108c SS |
930 | struct nextfield *list = NULL; |
931 | struct nextfield *new; | |
932 | int nfields = 0; | |
933 | int n; | |
934 | struct dieinfo mbr; | |
935 | char *nextdie; | |
936 | int anonymous_size; | |
c5aa993b | 937 | |
b59661bd AC |
938 | type = lookup_utype (dip->die_ref); |
939 | if (type == NULL) | |
c906108c SS |
940 | { |
941 | /* No forward references created an empty type, so install one now */ | |
c5aa993b | 942 | type = alloc_utype (dip->die_ref, NULL); |
c906108c | 943 | } |
c5aa993b JM |
944 | INIT_CPLUS_SPECIFIC (type); |
945 | switch (dip->die_tag) | |
c906108c | 946 | { |
c5aa993b JM |
947 | case TAG_class_type: |
948 | TYPE_CODE (type) = TYPE_CODE_CLASS; | |
949 | break; | |
950 | case TAG_structure_type: | |
951 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
952 | break; | |
953 | case TAG_union_type: | |
954 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
955 | break; | |
956 | default: | |
957 | /* Should never happen */ | |
958 | TYPE_CODE (type) = TYPE_CODE_UNDEF; | |
23136709 KB |
959 | complaint (&symfile_complaints, |
960 | "DIE @ 0x%x \"%s\", missing class, structure, or union tag", | |
961 | DIE_ID, DIE_NAME); | |
c5aa993b | 962 | break; |
c906108c SS |
963 | } |
964 | /* Some compilers try to be helpful by inventing "fake" names for | |
965 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
966 | Thanks, but no thanks... */ | |
c5aa993b JM |
967 | if (dip->at_name != NULL |
968 | && *dip->at_name != '~' | |
969 | && *dip->at_name != '.') | |
c906108c | 970 | { |
c5aa993b JM |
971 | TYPE_TAG_NAME (type) = obconcat (&objfile->type_obstack, |
972 | "", "", dip->at_name); | |
c906108c SS |
973 | } |
974 | /* Use whatever size is known. Zero is a valid size. We might however | |
975 | wish to check has_at_byte_size to make sure that some byte size was | |
976 | given explicitly, but DWARF doesn't specify that explicit sizes of | |
977 | zero have to present, so complaining about missing sizes should | |
978 | probably not be the default. */ | |
c5aa993b JM |
979 | TYPE_LENGTH (type) = dip->at_byte_size; |
980 | thisdie += dip->die_length; | |
c906108c SS |
981 | while (thisdie < enddie) |
982 | { | |
983 | basicdieinfo (&mbr, thisdie, objfile); | |
984 | completedieinfo (&mbr, objfile); | |
985 | if (mbr.die_length <= SIZEOF_DIE_LENGTH) | |
986 | { | |
987 | break; | |
988 | } | |
989 | else if (mbr.at_sibling != 0) | |
990 | { | |
991 | nextdie = dbbase + mbr.at_sibling - dbroff; | |
992 | } | |
993 | else | |
994 | { | |
995 | nextdie = thisdie + mbr.die_length; | |
996 | } | |
997 | switch (mbr.die_tag) | |
998 | { | |
999 | case TAG_member: | |
fba3138e DJ |
1000 | /* Static fields can be either TAG_global_variable (GCC) or else |
1001 | TAG_member with no location (Diab). We could treat the latter like | |
1002 | the former... but since we don't support the former, just avoid | |
1003 | crashing on the latter for now. */ | |
1004 | if (mbr.at_location == NULL) | |
1005 | break; | |
1006 | ||
c906108c SS |
1007 | /* Get space to record the next field's data. */ |
1008 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
c5aa993b | 1009 | new->next = list; |
c906108c SS |
1010 | list = new; |
1011 | /* Save the data. */ | |
c5aa993b JM |
1012 | list->field.name = |
1013 | obsavestring (mbr.at_name, strlen (mbr.at_name), | |
1014 | &objfile->type_obstack); | |
c906108c SS |
1015 | FIELD_TYPE (list->field) = decode_die_type (&mbr); |
1016 | FIELD_BITPOS (list->field) = 8 * locval (&mbr); | |
01ad7f36 | 1017 | FIELD_STATIC_KIND (list->field) = 0; |
c906108c SS |
1018 | /* Handle bit fields. */ |
1019 | FIELD_BITSIZE (list->field) = mbr.at_bit_size; | |
1020 | if (BITS_BIG_ENDIAN) | |
1021 | { | |
1022 | /* For big endian bits, the at_bit_offset gives the | |
c5aa993b JM |
1023 | additional bit offset from the MSB of the containing |
1024 | anonymous object to the MSB of the field. We don't | |
1025 | have to do anything special since we don't need to | |
1026 | know the size of the anonymous object. */ | |
c906108c SS |
1027 | FIELD_BITPOS (list->field) += mbr.at_bit_offset; |
1028 | } | |
1029 | else | |
1030 | { | |
1031 | /* For little endian bits, we need to have a non-zero | |
c5aa993b JM |
1032 | at_bit_size, so that we know we are in fact dealing |
1033 | with a bitfield. Compute the bit offset to the MSB | |
1034 | of the anonymous object, subtract off the number of | |
1035 | bits from the MSB of the field to the MSB of the | |
1036 | object, and then subtract off the number of bits of | |
1037 | the field itself. The result is the bit offset of | |
1038 | the LSB of the field. */ | |
c906108c SS |
1039 | if (mbr.at_bit_size > 0) |
1040 | { | |
1041 | if (mbr.has_at_byte_size) | |
1042 | { | |
1043 | /* The size of the anonymous object containing | |
c5aa993b JM |
1044 | the bit field is explicit, so use the |
1045 | indicated size (in bytes). */ | |
c906108c SS |
1046 | anonymous_size = mbr.at_byte_size; |
1047 | } | |
1048 | else | |
1049 | { | |
1050 | /* The size of the anonymous object containing | |
c5aa993b JM |
1051 | the bit field matches the size of an object |
1052 | of the bit field's type. DWARF allows | |
1053 | at_byte_size to be left out in such cases, as | |
1054 | a debug information size optimization. */ | |
1055 | anonymous_size = TYPE_LENGTH (list->field.type); | |
c906108c SS |
1056 | } |
1057 | FIELD_BITPOS (list->field) += | |
1058 | anonymous_size * 8 - mbr.at_bit_offset - mbr.at_bit_size; | |
1059 | } | |
1060 | } | |
1061 | nfields++; | |
1062 | break; | |
1063 | default: | |
1064 | process_dies (thisdie, nextdie, objfile); | |
1065 | break; | |
1066 | } | |
1067 | thisdie = nextdie; | |
1068 | } | |
1069 | /* Now create the vector of fields, and record how big it is. We may | |
1070 | not even have any fields, if this DIE was generated due to a reference | |
1071 | to an anonymous structure or union. In this case, TYPE_FLAG_STUB is | |
1072 | set, which clues gdb in to the fact that it needs to search elsewhere | |
1073 | for the full structure definition. */ | |
1074 | if (nfields == 0) | |
1075 | { | |
1076 | TYPE_FLAGS (type) |= TYPE_FLAG_STUB; | |
1077 | } | |
1078 | else | |
1079 | { | |
1080 | TYPE_NFIELDS (type) = nfields; | |
1081 | TYPE_FIELDS (type) = (struct field *) | |
1082 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
1083 | /* Copy the saved-up fields into the field vector. */ | |
c5aa993b | 1084 | for (n = nfields; list; list = list->next) |
c906108c | 1085 | { |
c5aa993b JM |
1086 | TYPE_FIELD (type, --n) = list->field; |
1087 | } | |
c906108c SS |
1088 | } |
1089 | return (type); | |
1090 | } | |
1091 | ||
1092 | /* | |
1093 | ||
c5aa993b | 1094 | LOCAL FUNCTION |
c906108c | 1095 | |
c5aa993b | 1096 | read_structure_scope -- process all dies within struct or union |
c906108c | 1097 | |
c5aa993b | 1098 | SYNOPSIS |
c906108c | 1099 | |
c5aa993b JM |
1100 | static void read_structure_scope (struct dieinfo *dip, |
1101 | char *thisdie, char *enddie, struct objfile *objfile) | |
c906108c | 1102 | |
c5aa993b | 1103 | DESCRIPTION |
c906108c | 1104 | |
c5aa993b JM |
1105 | Called when we find the DIE that starts a structure or union |
1106 | scope (definition) to process all dies that define the members | |
1107 | of the structure or union. DIP is a pointer to the die info | |
1108 | struct for the DIE that names the structure or union. | |
c906108c | 1109 | |
c5aa993b JM |
1110 | NOTES |
1111 | ||
1112 | Note that we need to call struct_type regardless of whether or not | |
1113 | the DIE has an at_name attribute, since it might be an anonymous | |
1114 | structure or union. This gets the type entered into our set of | |
1115 | user defined types. | |
1116 | ||
1117 | However, if the structure is incomplete (an opaque struct/union) | |
1118 | then suppress creating a symbol table entry for it since gdb only | |
1119 | wants to find the one with the complete definition. Note that if | |
1120 | it is complete, we just call new_symbol, which does it's own | |
1121 | checking about whether the struct/union is anonymous or not (and | |
1122 | suppresses creating a symbol table entry itself). | |
c906108c | 1123 | |
c906108c SS |
1124 | */ |
1125 | ||
1126 | static void | |
fba45db2 KB |
1127 | read_structure_scope (struct dieinfo *dip, char *thisdie, char *enddie, |
1128 | struct objfile *objfile) | |
c906108c SS |
1129 | { |
1130 | struct type *type; | |
1131 | struct symbol *sym; | |
c5aa993b | 1132 | |
c906108c | 1133 | type = struct_type (dip, thisdie, enddie, objfile); |
74a9bb82 | 1134 | if (!TYPE_STUB (type)) |
c906108c SS |
1135 | { |
1136 | sym = new_symbol (dip, objfile); | |
1137 | if (sym != NULL) | |
1138 | { | |
1139 | SYMBOL_TYPE (sym) = type; | |
1140 | if (cu_language == language_cplus) | |
1141 | { | |
1142 | synthesize_typedef (dip, objfile, type); | |
1143 | } | |
1144 | } | |
1145 | } | |
1146 | } | |
1147 | ||
1148 | /* | |
1149 | ||
c5aa993b | 1150 | LOCAL FUNCTION |
c906108c | 1151 | |
c5aa993b | 1152 | decode_array_element_type -- decode type of the array elements |
c906108c | 1153 | |
c5aa993b | 1154 | SYNOPSIS |
c906108c | 1155 | |
c5aa993b | 1156 | static struct type *decode_array_element_type (char *scan, char *end) |
c906108c | 1157 | |
c5aa993b | 1158 | DESCRIPTION |
c906108c | 1159 | |
c5aa993b JM |
1160 | As the last step in decoding the array subscript information for an |
1161 | array DIE, we need to decode the type of the array elements. We are | |
1162 | passed a pointer to this last part of the subscript information and | |
1163 | must return the appropriate type. If the type attribute is not | |
1164 | recognized, just warn about the problem and return type int. | |
c906108c SS |
1165 | */ |
1166 | ||
1167 | static struct type * | |
fba45db2 | 1168 | decode_array_element_type (char *scan) |
c906108c SS |
1169 | { |
1170 | struct type *typep; | |
1171 | DIE_REF die_ref; | |
1172 | unsigned short attribute; | |
1173 | unsigned short fundtype; | |
1174 | int nbytes; | |
c5aa993b | 1175 | |
c906108c SS |
1176 | attribute = target_to_host (scan, SIZEOF_ATTRIBUTE, GET_UNSIGNED, |
1177 | current_objfile); | |
1178 | scan += SIZEOF_ATTRIBUTE; | |
b59661bd AC |
1179 | nbytes = attribute_size (attribute); |
1180 | if (nbytes == -1) | |
c906108c | 1181 | { |
23136709 | 1182 | bad_array_element_type_complaint (DIE_ID, DIE_NAME, attribute); |
c906108c SS |
1183 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1184 | } | |
1185 | else | |
1186 | { | |
1187 | switch (attribute) | |
1188 | { | |
c5aa993b JM |
1189 | case AT_fund_type: |
1190 | fundtype = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1191 | current_objfile); | |
1192 | typep = decode_fund_type (fundtype); | |
1193 | break; | |
1194 | case AT_mod_fund_type: | |
1195 | typep = decode_mod_fund_type (scan); | |
1196 | break; | |
1197 | case AT_user_def_type: | |
1198 | die_ref = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1199 | current_objfile); | |
b59661bd AC |
1200 | typep = lookup_utype (die_ref); |
1201 | if (typep == NULL) | |
c5aa993b JM |
1202 | { |
1203 | typep = alloc_utype (die_ref, NULL); | |
1204 | } | |
1205 | break; | |
1206 | case AT_mod_u_d_type: | |
1207 | typep = decode_mod_u_d_type (scan); | |
1208 | break; | |
1209 | default: | |
23136709 | 1210 | bad_array_element_type_complaint (DIE_ID, DIE_NAME, attribute); |
c5aa993b JM |
1211 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1212 | break; | |
1213 | } | |
c906108c SS |
1214 | } |
1215 | return (typep); | |
1216 | } | |
1217 | ||
1218 | /* | |
1219 | ||
c5aa993b | 1220 | LOCAL FUNCTION |
c906108c | 1221 | |
c5aa993b | 1222 | decode_subscript_data_item -- decode array subscript item |
c906108c | 1223 | |
c5aa993b | 1224 | SYNOPSIS |
c906108c | 1225 | |
c5aa993b JM |
1226 | static struct type * |
1227 | decode_subscript_data_item (char *scan, char *end) | |
c906108c | 1228 | |
c5aa993b | 1229 | DESCRIPTION |
c906108c | 1230 | |
c5aa993b JM |
1231 | The array subscripts and the data type of the elements of an |
1232 | array are described by a list of data items, stored as a block | |
1233 | of contiguous bytes. There is a data item describing each array | |
1234 | dimension, and a final data item describing the element type. | |
1235 | The data items are ordered the same as their appearance in the | |
1236 | source (I.E. leftmost dimension first, next to leftmost second, | |
1237 | etc). | |
c906108c | 1238 | |
c5aa993b JM |
1239 | The data items describing each array dimension consist of four |
1240 | parts: (1) a format specifier, (2) type type of the subscript | |
1241 | index, (3) a description of the low bound of the array dimension, | |
1242 | and (4) a description of the high bound of the array dimension. | |
c906108c | 1243 | |
c5aa993b JM |
1244 | The last data item is the description of the type of each of |
1245 | the array elements. | |
c906108c | 1246 | |
c5aa993b JM |
1247 | We are passed a pointer to the start of the block of bytes |
1248 | containing the remaining data items, and a pointer to the first | |
1249 | byte past the data. This function recursively decodes the | |
1250 | remaining data items and returns a type. | |
c906108c | 1251 | |
c5aa993b JM |
1252 | If we somehow fail to decode some data, we complain about it |
1253 | and return a type "array of int". | |
c906108c | 1254 | |
c5aa993b JM |
1255 | BUGS |
1256 | FIXME: This code only implements the forms currently used | |
1257 | by the AT&T and GNU C compilers. | |
c906108c | 1258 | |
c5aa993b JM |
1259 | The end pointer is supplied for error checking, maybe we should |
1260 | use it for that... | |
c906108c SS |
1261 | */ |
1262 | ||
1263 | static struct type * | |
fba45db2 | 1264 | decode_subscript_data_item (char *scan, char *end) |
c906108c SS |
1265 | { |
1266 | struct type *typep = NULL; /* Array type we are building */ | |
1267 | struct type *nexttype; /* Type of each element (may be array) */ | |
1268 | struct type *indextype; /* Type of this index */ | |
1269 | struct type *rangetype; | |
1270 | unsigned int format; | |
1271 | unsigned short fundtype; | |
1272 | unsigned long lowbound; | |
1273 | unsigned long highbound; | |
1274 | int nbytes; | |
c5aa993b | 1275 | |
c906108c SS |
1276 | format = target_to_host (scan, SIZEOF_FORMAT_SPECIFIER, GET_UNSIGNED, |
1277 | current_objfile); | |
1278 | scan += SIZEOF_FORMAT_SPECIFIER; | |
1279 | switch (format) | |
1280 | { | |
1281 | case FMT_ET: | |
1282 | typep = decode_array_element_type (scan); | |
1283 | break; | |
1284 | case FMT_FT_C_C: | |
1285 | fundtype = target_to_host (scan, SIZEOF_FMT_FT, GET_UNSIGNED, | |
1286 | current_objfile); | |
1287 | indextype = decode_fund_type (fundtype); | |
1288 | scan += SIZEOF_FMT_FT; | |
1289 | nbytes = TARGET_FT_LONG_SIZE (current_objfile); | |
1290 | lowbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1291 | scan += nbytes; | |
1292 | highbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1293 | scan += nbytes; | |
1294 | nexttype = decode_subscript_data_item (scan, end); | |
1295 | if (nexttype == NULL) | |
1296 | { | |
1297 | /* Munged subscript data or other problem, fake it. */ | |
23136709 KB |
1298 | complaint (&symfile_complaints, |
1299 | "DIE @ 0x%x \"%s\", can't decode subscript data items", | |
1300 | DIE_ID, DIE_NAME); | |
c906108c SS |
1301 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1302 | } | |
1303 | rangetype = create_range_type ((struct type *) NULL, indextype, | |
c5aa993b | 1304 | lowbound, highbound); |
c906108c SS |
1305 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); |
1306 | break; | |
1307 | case FMT_FT_C_X: | |
1308 | case FMT_FT_X_C: | |
1309 | case FMT_FT_X_X: | |
1310 | case FMT_UT_C_C: | |
1311 | case FMT_UT_C_X: | |
1312 | case FMT_UT_X_C: | |
1313 | case FMT_UT_X_X: | |
23136709 KB |
1314 | complaint (&symfile_complaints, |
1315 | "DIE @ 0x%x \"%s\", array subscript format 0x%x not handled yet", | |
1316 | DIE_ID, DIE_NAME, format); | |
c906108c SS |
1317 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1318 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1319 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
1320 | break; | |
1321 | default: | |
23136709 KB |
1322 | complaint (&symfile_complaints, |
1323 | "DIE @ 0x%x \"%s\", unknown array subscript format %x", DIE_ID, | |
1324 | DIE_NAME, format); | |
c906108c SS |
1325 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1326 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1327 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
1328 | break; | |
1329 | } | |
1330 | return (typep); | |
1331 | } | |
1332 | ||
1333 | /* | |
1334 | ||
c5aa993b | 1335 | LOCAL FUNCTION |
c906108c | 1336 | |
c5aa993b | 1337 | dwarf_read_array_type -- read TAG_array_type DIE |
c906108c | 1338 | |
c5aa993b | 1339 | SYNOPSIS |
c906108c | 1340 | |
c5aa993b | 1341 | static void dwarf_read_array_type (struct dieinfo *dip) |
c906108c | 1342 | |
c5aa993b | 1343 | DESCRIPTION |
c906108c | 1344 | |
c5aa993b JM |
1345 | Extract all information from a TAG_array_type DIE and add to |
1346 | the user defined type vector. | |
c906108c SS |
1347 | */ |
1348 | ||
1349 | static void | |
fba45db2 | 1350 | dwarf_read_array_type (struct dieinfo *dip) |
c906108c SS |
1351 | { |
1352 | struct type *type; | |
1353 | struct type *utype; | |
1354 | char *sub; | |
1355 | char *subend; | |
1356 | unsigned short blocksz; | |
1357 | int nbytes; | |
c5aa993b JM |
1358 | |
1359 | if (dip->at_ordering != ORD_row_major) | |
c906108c SS |
1360 | { |
1361 | /* FIXME: Can gdb even handle column major arrays? */ | |
23136709 KB |
1362 | complaint (&symfile_complaints, |
1363 | "DIE @ 0x%x \"%s\", array not row major; not handled correctly", | |
1364 | DIE_ID, DIE_NAME); | |
c906108c | 1365 | } |
b59661bd AC |
1366 | sub = dip->at_subscr_data; |
1367 | if (sub != NULL) | |
c906108c SS |
1368 | { |
1369 | nbytes = attribute_size (AT_subscr_data); | |
1370 | blocksz = target_to_host (sub, nbytes, GET_UNSIGNED, current_objfile); | |
1371 | subend = sub + nbytes + blocksz; | |
1372 | sub += nbytes; | |
1373 | type = decode_subscript_data_item (sub, subend); | |
b59661bd AC |
1374 | utype = lookup_utype (dip->die_ref); |
1375 | if (utype == NULL) | |
c906108c SS |
1376 | { |
1377 | /* Install user defined type that has not been referenced yet. */ | |
c5aa993b | 1378 | alloc_utype (dip->die_ref, type); |
c906108c SS |
1379 | } |
1380 | else if (TYPE_CODE (utype) == TYPE_CODE_UNDEF) | |
1381 | { | |
1382 | /* Ick! A forward ref has already generated a blank type in our | |
1383 | slot, and this type probably already has things pointing to it | |
1384 | (which is what caused it to be created in the first place). | |
1385 | If it's just a place holder we can plop our fully defined type | |
1386 | on top of it. We can't recover the space allocated for our | |
1387 | new type since it might be on an obstack, but we could reuse | |
1388 | it if we kept a list of them, but it might not be worth it | |
1389 | (FIXME). */ | |
1390 | *utype = *type; | |
1391 | } | |
1392 | else | |
1393 | { | |
1394 | /* Double ick! Not only is a type already in our slot, but | |
1395 | someone has decorated it. Complain and leave it alone. */ | |
23136709 | 1396 | dup_user_type_definition_complaint (DIE_ID, DIE_NAME); |
c906108c SS |
1397 | } |
1398 | } | |
1399 | } | |
1400 | ||
1401 | /* | |
1402 | ||
c5aa993b | 1403 | LOCAL FUNCTION |
c906108c | 1404 | |
c5aa993b | 1405 | read_tag_pointer_type -- read TAG_pointer_type DIE |
c906108c | 1406 | |
c5aa993b | 1407 | SYNOPSIS |
c906108c | 1408 | |
c5aa993b | 1409 | static void read_tag_pointer_type (struct dieinfo *dip) |
c906108c | 1410 | |
c5aa993b | 1411 | DESCRIPTION |
c906108c | 1412 | |
c5aa993b JM |
1413 | Extract all information from a TAG_pointer_type DIE and add to |
1414 | the user defined type vector. | |
c906108c SS |
1415 | */ |
1416 | ||
1417 | static void | |
fba45db2 | 1418 | read_tag_pointer_type (struct dieinfo *dip) |
c906108c SS |
1419 | { |
1420 | struct type *type; | |
1421 | struct type *utype; | |
c5aa993b | 1422 | |
c906108c | 1423 | type = decode_die_type (dip); |
b59661bd AC |
1424 | utype = lookup_utype (dip->die_ref); |
1425 | if (utype == NULL) | |
c906108c SS |
1426 | { |
1427 | utype = lookup_pointer_type (type); | |
c5aa993b | 1428 | alloc_utype (dip->die_ref, utype); |
c906108c SS |
1429 | } |
1430 | else | |
1431 | { | |
1432 | TYPE_TARGET_TYPE (utype) = type; | |
1433 | TYPE_POINTER_TYPE (type) = utype; | |
1434 | ||
1435 | /* We assume the machine has only one representation for pointers! */ | |
1436 | /* FIXME: Possably a poor assumption */ | |
c5aa993b | 1437 | TYPE_LENGTH (utype) = TARGET_PTR_BIT / TARGET_CHAR_BIT; |
c906108c SS |
1438 | TYPE_CODE (utype) = TYPE_CODE_PTR; |
1439 | } | |
1440 | } | |
1441 | ||
1442 | /* | |
1443 | ||
c5aa993b | 1444 | LOCAL FUNCTION |
c906108c | 1445 | |
c5aa993b | 1446 | read_tag_string_type -- read TAG_string_type DIE |
c906108c | 1447 | |
c5aa993b | 1448 | SYNOPSIS |
c906108c | 1449 | |
c5aa993b | 1450 | static void read_tag_string_type (struct dieinfo *dip) |
c906108c | 1451 | |
c5aa993b | 1452 | DESCRIPTION |
c906108c | 1453 | |
c5aa993b JM |
1454 | Extract all information from a TAG_string_type DIE and add to |
1455 | the user defined type vector. It isn't really a user defined | |
1456 | type, but it behaves like one, with other DIE's using an | |
1457 | AT_user_def_type attribute to reference it. | |
c906108c SS |
1458 | */ |
1459 | ||
1460 | static void | |
fba45db2 | 1461 | read_tag_string_type (struct dieinfo *dip) |
c906108c SS |
1462 | { |
1463 | struct type *utype; | |
1464 | struct type *indextype; | |
1465 | struct type *rangetype; | |
1466 | unsigned long lowbound = 0; | |
1467 | unsigned long highbound; | |
1468 | ||
c5aa993b | 1469 | if (dip->has_at_byte_size) |
c906108c SS |
1470 | { |
1471 | /* A fixed bounds string */ | |
c5aa993b | 1472 | highbound = dip->at_byte_size - 1; |
c906108c SS |
1473 | } |
1474 | else | |
1475 | { | |
1476 | /* A varying length string. Stub for now. (FIXME) */ | |
1477 | highbound = 1; | |
1478 | } | |
1479 | indextype = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1480 | rangetype = create_range_type ((struct type *) NULL, indextype, lowbound, | |
1481 | highbound); | |
c5aa993b JM |
1482 | |
1483 | utype = lookup_utype (dip->die_ref); | |
c906108c SS |
1484 | if (utype == NULL) |
1485 | { | |
1486 | /* No type defined, go ahead and create a blank one to use. */ | |
c5aa993b | 1487 | utype = alloc_utype (dip->die_ref, (struct type *) NULL); |
c906108c SS |
1488 | } |
1489 | else | |
1490 | { | |
1491 | /* Already a type in our slot due to a forward reference. Make sure it | |
c5aa993b | 1492 | is a blank one. If not, complain and leave it alone. */ |
c906108c SS |
1493 | if (TYPE_CODE (utype) != TYPE_CODE_UNDEF) |
1494 | { | |
23136709 | 1495 | dup_user_type_definition_complaint (DIE_ID, DIE_NAME); |
c906108c SS |
1496 | return; |
1497 | } | |
1498 | } | |
1499 | ||
1500 | /* Create the string type using the blank type we either found or created. */ | |
1501 | utype = create_string_type (utype, rangetype); | |
1502 | } | |
1503 | ||
1504 | /* | |
1505 | ||
c5aa993b | 1506 | LOCAL FUNCTION |
c906108c | 1507 | |
c5aa993b | 1508 | read_subroutine_type -- process TAG_subroutine_type dies |
c906108c | 1509 | |
c5aa993b | 1510 | SYNOPSIS |
c906108c | 1511 | |
c5aa993b JM |
1512 | static void read_subroutine_type (struct dieinfo *dip, char thisdie, |
1513 | char *enddie) | |
c906108c | 1514 | |
c5aa993b | 1515 | DESCRIPTION |
c906108c | 1516 | |
c5aa993b | 1517 | Handle DIES due to C code like: |
c906108c | 1518 | |
c5aa993b JM |
1519 | struct foo { |
1520 | int (*funcp)(int a, long l); (Generates TAG_subroutine_type DIE) | |
1521 | int b; | |
1522 | }; | |
c906108c | 1523 | |
c5aa993b | 1524 | NOTES |
c906108c | 1525 | |
c5aa993b JM |
1526 | The parameter DIES are currently ignored. See if gdb has a way to |
1527 | include this info in it's type system, and decode them if so. Is | |
1528 | this what the type structure's "arg_types" field is for? (FIXME) | |
c906108c SS |
1529 | */ |
1530 | ||
1531 | static void | |
fba45db2 | 1532 | read_subroutine_type (struct dieinfo *dip, char *thisdie, char *enddie) |
c906108c SS |
1533 | { |
1534 | struct type *type; /* Type that this function returns */ | |
1535 | struct type *ftype; /* Function that returns above type */ | |
c5aa993b | 1536 | |
c906108c SS |
1537 | /* Decode the type that this subroutine returns */ |
1538 | ||
1539 | type = decode_die_type (dip); | |
1540 | ||
1541 | /* Check to see if we already have a partially constructed user | |
1542 | defined type for this DIE, from a forward reference. */ | |
1543 | ||
b59661bd AC |
1544 | ftype = lookup_utype (dip->die_ref); |
1545 | if (ftype == NULL) | |
c906108c SS |
1546 | { |
1547 | /* This is the first reference to one of these types. Make | |
c5aa993b | 1548 | a new one and place it in the user defined types. */ |
c906108c | 1549 | ftype = lookup_function_type (type); |
c5aa993b | 1550 | alloc_utype (dip->die_ref, ftype); |
c906108c SS |
1551 | } |
1552 | else if (TYPE_CODE (ftype) == TYPE_CODE_UNDEF) | |
1553 | { | |
1554 | /* We have an existing partially constructed type, so bash it | |
c5aa993b | 1555 | into the correct type. */ |
c906108c SS |
1556 | TYPE_TARGET_TYPE (ftype) = type; |
1557 | TYPE_LENGTH (ftype) = 1; | |
1558 | TYPE_CODE (ftype) = TYPE_CODE_FUNC; | |
1559 | } | |
1560 | else | |
1561 | { | |
23136709 | 1562 | dup_user_type_definition_complaint (DIE_ID, DIE_NAME); |
c906108c SS |
1563 | } |
1564 | } | |
1565 | ||
1566 | /* | |
1567 | ||
c5aa993b | 1568 | LOCAL FUNCTION |
c906108c | 1569 | |
c5aa993b | 1570 | read_enumeration -- process dies which define an enumeration |
c906108c | 1571 | |
c5aa993b | 1572 | SYNOPSIS |
c906108c | 1573 | |
c5aa993b JM |
1574 | static void read_enumeration (struct dieinfo *dip, char *thisdie, |
1575 | char *enddie, struct objfile *objfile) | |
c906108c | 1576 | |
c5aa993b | 1577 | DESCRIPTION |
c906108c | 1578 | |
c5aa993b JM |
1579 | Given a pointer to a die which begins an enumeration, process all |
1580 | the dies that define the members of the enumeration. | |
c906108c | 1581 | |
c5aa993b | 1582 | NOTES |
c906108c | 1583 | |
c5aa993b JM |
1584 | Note that we need to call enum_type regardless of whether or not we |
1585 | have a symbol, since we might have an enum without a tag name (thus | |
1586 | no symbol for the tagname). | |
c906108c SS |
1587 | */ |
1588 | ||
1589 | static void | |
fba45db2 KB |
1590 | read_enumeration (struct dieinfo *dip, char *thisdie, char *enddie, |
1591 | struct objfile *objfile) | |
c906108c SS |
1592 | { |
1593 | struct type *type; | |
1594 | struct symbol *sym; | |
c5aa993b | 1595 | |
c906108c SS |
1596 | type = enum_type (dip, objfile); |
1597 | sym = new_symbol (dip, objfile); | |
1598 | if (sym != NULL) | |
1599 | { | |
1600 | SYMBOL_TYPE (sym) = type; | |
1601 | if (cu_language == language_cplus) | |
1602 | { | |
1603 | synthesize_typedef (dip, objfile, type); | |
1604 | } | |
1605 | } | |
1606 | } | |
1607 | ||
1608 | /* | |
1609 | ||
c5aa993b | 1610 | LOCAL FUNCTION |
c906108c | 1611 | |
c5aa993b | 1612 | enum_type -- decode and return a type for an enumeration |
c906108c | 1613 | |
c5aa993b | 1614 | SYNOPSIS |
c906108c | 1615 | |
c5aa993b | 1616 | static type *enum_type (struct dieinfo *dip, struct objfile *objfile) |
c906108c | 1617 | |
c5aa993b | 1618 | DESCRIPTION |
c906108c | 1619 | |
c5aa993b JM |
1620 | Given a pointer to a die information structure for the die which |
1621 | starts an enumeration, process all the dies that define the members | |
1622 | of the enumeration and return a type pointer for the enumeration. | |
c906108c | 1623 | |
c5aa993b | 1624 | At the same time, for each member of the enumeration, create a |
176620f1 | 1625 | symbol for it with domain VAR_DOMAIN and class LOC_CONST, |
c5aa993b | 1626 | and give it the type of the enumeration itself. |
c906108c | 1627 | |
c5aa993b | 1628 | NOTES |
c906108c | 1629 | |
c5aa993b JM |
1630 | Note that the DWARF specification explicitly mandates that enum |
1631 | constants occur in reverse order from the source program order, | |
1632 | for "consistency" and because this ordering is easier for many | |
1633 | compilers to generate. (Draft 6, sec 3.8.5, Enumeration type | |
1634 | Entries). Because gdb wants to see the enum members in program | |
1635 | source order, we have to ensure that the order gets reversed while | |
1636 | we are processing them. | |
c906108c SS |
1637 | */ |
1638 | ||
1639 | static struct type * | |
fba45db2 | 1640 | enum_type (struct dieinfo *dip, struct objfile *objfile) |
c906108c SS |
1641 | { |
1642 | struct type *type; | |
c5aa993b JM |
1643 | struct nextfield |
1644 | { | |
1645 | struct nextfield *next; | |
1646 | struct field field; | |
1647 | }; | |
c906108c SS |
1648 | struct nextfield *list = NULL; |
1649 | struct nextfield *new; | |
1650 | int nfields = 0; | |
1651 | int n; | |
1652 | char *scan; | |
1653 | char *listend; | |
1654 | unsigned short blocksz; | |
1655 | struct symbol *sym; | |
1656 | int nbytes; | |
1657 | int unsigned_enum = 1; | |
c5aa993b | 1658 | |
b59661bd AC |
1659 | type = lookup_utype (dip->die_ref); |
1660 | if (type == NULL) | |
c906108c SS |
1661 | { |
1662 | /* No forward references created an empty type, so install one now */ | |
c5aa993b | 1663 | type = alloc_utype (dip->die_ref, NULL); |
c906108c SS |
1664 | } |
1665 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
1666 | /* Some compilers try to be helpful by inventing "fake" names for | |
1667 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1668 | Thanks, but no thanks... */ | |
c5aa993b JM |
1669 | if (dip->at_name != NULL |
1670 | && *dip->at_name != '~' | |
1671 | && *dip->at_name != '.') | |
c906108c | 1672 | { |
c5aa993b JM |
1673 | TYPE_TAG_NAME (type) = obconcat (&objfile->type_obstack, |
1674 | "", "", dip->at_name); | |
c906108c | 1675 | } |
c5aa993b | 1676 | if (dip->at_byte_size != 0) |
c906108c | 1677 | { |
c5aa993b | 1678 | TYPE_LENGTH (type) = dip->at_byte_size; |
c906108c | 1679 | } |
b59661bd AC |
1680 | scan = dip->at_element_list; |
1681 | if (scan != NULL) | |
c906108c | 1682 | { |
c5aa993b | 1683 | if (dip->short_element_list) |
c906108c SS |
1684 | { |
1685 | nbytes = attribute_size (AT_short_element_list); | |
1686 | } | |
1687 | else | |
1688 | { | |
1689 | nbytes = attribute_size (AT_element_list); | |
1690 | } | |
1691 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); | |
1692 | listend = scan + nbytes + blocksz; | |
1693 | scan += nbytes; | |
1694 | while (scan < listend) | |
1695 | { | |
1696 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
c5aa993b | 1697 | new->next = list; |
c906108c SS |
1698 | list = new; |
1699 | FIELD_TYPE (list->field) = NULL; | |
1700 | FIELD_BITSIZE (list->field) = 0; | |
01ad7f36 | 1701 | FIELD_STATIC_KIND (list->field) = 0; |
c906108c SS |
1702 | FIELD_BITPOS (list->field) = |
1703 | target_to_host (scan, TARGET_FT_LONG_SIZE (objfile), GET_SIGNED, | |
1704 | objfile); | |
1705 | scan += TARGET_FT_LONG_SIZE (objfile); | |
c5aa993b JM |
1706 | list->field.name = obsavestring (scan, strlen (scan), |
1707 | &objfile->type_obstack); | |
c906108c SS |
1708 | scan += strlen (scan) + 1; |
1709 | nfields++; | |
1710 | /* Handcraft a new symbol for this enum member. */ | |
1711 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, | |
1712 | sizeof (struct symbol)); | |
1713 | memset (sym, 0, sizeof (struct symbol)); | |
22abf04a | 1714 | DEPRECATED_SYMBOL_NAME (sym) = create_name (list->field.name, |
c906108c SS |
1715 | &objfile->symbol_obstack); |
1716 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); | |
176620f1 | 1717 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
c906108c SS |
1718 | SYMBOL_CLASS (sym) = LOC_CONST; |
1719 | SYMBOL_TYPE (sym) = type; | |
1720 | SYMBOL_VALUE (sym) = FIELD_BITPOS (list->field); | |
1721 | if (SYMBOL_VALUE (sym) < 0) | |
1722 | unsigned_enum = 0; | |
1723 | add_symbol_to_list (sym, list_in_scope); | |
1724 | } | |
1725 | /* Now create the vector of fields, and record how big it is. This is | |
c5aa993b JM |
1726 | where we reverse the order, by pulling the members off the list in |
1727 | reverse order from how they were inserted. If we have no fields | |
1728 | (this is apparently possible in C++) then skip building a field | |
1729 | vector. */ | |
c906108c SS |
1730 | if (nfields > 0) |
1731 | { | |
1732 | if (unsigned_enum) | |
1733 | TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED; | |
1734 | TYPE_NFIELDS (type) = nfields; | |
1735 | TYPE_FIELDS (type) = (struct field *) | |
1736 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct field) * nfields); | |
1737 | /* Copy the saved-up fields into the field vector. */ | |
c5aa993b | 1738 | for (n = 0; (n < nfields) && (list != NULL); list = list->next) |
c906108c | 1739 | { |
c5aa993b JM |
1740 | TYPE_FIELD (type, n++) = list->field; |
1741 | } | |
c906108c SS |
1742 | } |
1743 | } | |
1744 | return (type); | |
1745 | } | |
1746 | ||
1747 | /* | |
1748 | ||
c5aa993b | 1749 | LOCAL FUNCTION |
c906108c | 1750 | |
c5aa993b | 1751 | read_func_scope -- process all dies within a function scope |
c906108c | 1752 | |
c5aa993b | 1753 | DESCRIPTION |
c906108c | 1754 | |
c5aa993b JM |
1755 | Process all dies within a given function scope. We are passed |
1756 | a die information structure pointer DIP for the die which | |
1757 | starts the function scope, and pointers into the raw die data | |
1758 | that define the dies within the function scope. | |
1759 | ||
1760 | For now, we ignore lexical block scopes within the function. | |
1761 | The problem is that AT&T cc does not define a DWARF lexical | |
1762 | block scope for the function itself, while gcc defines a | |
1763 | lexical block scope for the function. We need to think about | |
1764 | how to handle this difference, or if it is even a problem. | |
1765 | (FIXME) | |
c906108c SS |
1766 | */ |
1767 | ||
1768 | static void | |
fba45db2 KB |
1769 | read_func_scope (struct dieinfo *dip, char *thisdie, char *enddie, |
1770 | struct objfile *objfile) | |
c906108c | 1771 | { |
b59661bd | 1772 | struct context_stack *new; |
c5aa993b | 1773 | |
c906108c SS |
1774 | /* AT_name is absent if the function is described with an |
1775 | AT_abstract_origin tag. | |
1776 | Ignore the function description for now to avoid GDB core dumps. | |
1777 | FIXME: Add code to handle AT_abstract_origin tags properly. */ | |
c5aa993b | 1778 | if (dip->at_name == NULL) |
c906108c | 1779 | { |
23136709 KB |
1780 | complaint (&symfile_complaints, "DIE @ 0x%x, AT_name tag missing", |
1781 | DIE_ID); | |
c906108c SS |
1782 | return; |
1783 | } | |
1784 | ||
c5aa993b JM |
1785 | if (objfile->ei.entry_point >= dip->at_low_pc && |
1786 | objfile->ei.entry_point < dip->at_high_pc) | |
c906108c | 1787 | { |
c5aa993b JM |
1788 | objfile->ei.entry_func_lowpc = dip->at_low_pc; |
1789 | objfile->ei.entry_func_highpc = dip->at_high_pc; | |
c906108c | 1790 | } |
c5aa993b JM |
1791 | new = push_context (0, dip->at_low_pc); |
1792 | new->name = new_symbol (dip, objfile); | |
c906108c | 1793 | list_in_scope = &local_symbols; |
c5aa993b | 1794 | process_dies (thisdie + dip->die_length, enddie, objfile); |
c906108c SS |
1795 | new = pop_context (); |
1796 | /* Make a block for the local symbols within. */ | |
c5aa993b JM |
1797 | finish_block (new->name, &local_symbols, new->old_blocks, |
1798 | new->start_addr, dip->at_high_pc, objfile); | |
c906108c SS |
1799 | list_in_scope = &file_symbols; |
1800 | } | |
1801 | ||
1802 | ||
1803 | /* | |
1804 | ||
c5aa993b | 1805 | LOCAL FUNCTION |
c906108c | 1806 | |
c5aa993b | 1807 | handle_producer -- process the AT_producer attribute |
c906108c | 1808 | |
c5aa993b | 1809 | DESCRIPTION |
c906108c | 1810 | |
c5aa993b JM |
1811 | Perform any operations that depend on finding a particular |
1812 | AT_producer attribute. | |
c906108c SS |
1813 | |
1814 | */ | |
1815 | ||
1816 | static void | |
fba45db2 | 1817 | handle_producer (char *producer) |
c906108c SS |
1818 | { |
1819 | ||
1820 | /* If this compilation unit was compiled with g++ or gcc, then set the | |
1821 | processing_gcc_compilation flag. */ | |
1822 | ||
cb137aa5 | 1823 | if (DEPRECATED_STREQN (producer, GCC_PRODUCER, strlen (GCC_PRODUCER))) |
c906108c SS |
1824 | { |
1825 | char version = producer[strlen (GCC_PRODUCER)]; | |
1826 | processing_gcc_compilation = (version == '2' ? 2 : 1); | |
1827 | } | |
1828 | else | |
1829 | { | |
1830 | processing_gcc_compilation = | |
bf896cb0 | 1831 | strncmp (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER)) == 0; |
c906108c SS |
1832 | } |
1833 | ||
1834 | /* Select a demangling style if we can identify the producer and if | |
1835 | the current style is auto. We leave the current style alone if it | |
1836 | is not auto. We also leave the demangling style alone if we find a | |
1837 | gcc (cc1) producer, as opposed to a g++ (cc1plus) producer. */ | |
1838 | ||
1839 | if (AUTO_DEMANGLING) | |
1840 | { | |
cb137aa5 | 1841 | if (DEPRECATED_STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER))) |
c906108c | 1842 | { |
8052a17a JM |
1843 | #if 0 |
1844 | /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't | |
1845 | know whether it will use the old style or v3 mangling. */ | |
c906108c | 1846 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); |
8052a17a | 1847 | #endif |
c906108c | 1848 | } |
cb137aa5 | 1849 | else if (DEPRECATED_STREQN (producer, LCC_PRODUCER, strlen (LCC_PRODUCER))) |
c906108c SS |
1850 | { |
1851 | set_demangling_style (LUCID_DEMANGLING_STYLE_STRING); | |
1852 | } | |
1853 | } | |
1854 | } | |
1855 | ||
1856 | ||
1857 | /* | |
1858 | ||
c5aa993b | 1859 | LOCAL FUNCTION |
c906108c | 1860 | |
c5aa993b | 1861 | read_file_scope -- process all dies within a file scope |
c906108c | 1862 | |
c5aa993b JM |
1863 | DESCRIPTION |
1864 | ||
1865 | Process all dies within a given file scope. We are passed a | |
1866 | pointer to the die information structure for the die which | |
1867 | starts the file scope, and pointers into the raw die data which | |
1868 | mark the range of dies within the file scope. | |
c906108c | 1869 | |
c5aa993b JM |
1870 | When the partial symbol table is built, the file offset for the line |
1871 | number table for each compilation unit is saved in the partial symbol | |
1872 | table entry for that compilation unit. As the symbols for each | |
1873 | compilation unit are read, the line number table is read into memory | |
1874 | and the variable lnbase is set to point to it. Thus all we have to | |
1875 | do is use lnbase to access the line number table for the current | |
1876 | compilation unit. | |
c906108c SS |
1877 | */ |
1878 | ||
1879 | static void | |
fba45db2 KB |
1880 | read_file_scope (struct dieinfo *dip, char *thisdie, char *enddie, |
1881 | struct objfile *objfile) | |
c906108c SS |
1882 | { |
1883 | struct cleanup *back_to; | |
1884 | struct symtab *symtab; | |
c5aa993b JM |
1885 | |
1886 | if (objfile->ei.entry_point >= dip->at_low_pc && | |
1887 | objfile->ei.entry_point < dip->at_high_pc) | |
c906108c | 1888 | { |
627b3ba2 AC |
1889 | objfile->ei.deprecated_entry_file_lowpc = dip->at_low_pc; |
1890 | objfile->ei.deprecated_entry_file_highpc = dip->at_high_pc; | |
c906108c SS |
1891 | } |
1892 | set_cu_language (dip); | |
c5aa993b | 1893 | if (dip->at_producer != NULL) |
c906108c | 1894 | { |
c5aa993b | 1895 | handle_producer (dip->at_producer); |
c906108c SS |
1896 | } |
1897 | numutypes = (enddie - thisdie) / 4; | |
1898 | utypes = (struct type **) xmalloc (numutypes * sizeof (struct type *)); | |
1899 | back_to = make_cleanup (free_utypes, NULL); | |
1900 | memset (utypes, 0, numutypes * sizeof (struct type *)); | |
1901 | memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *)); | |
c5aa993b | 1902 | start_symtab (dip->at_name, dip->at_comp_dir, dip->at_low_pc); |
c906108c SS |
1903 | record_debugformat ("DWARF 1"); |
1904 | decode_line_numbers (lnbase); | |
c5aa993b | 1905 | process_dies (thisdie + dip->die_length, enddie, objfile); |
c906108c | 1906 | |
c5aa993b | 1907 | symtab = end_symtab (dip->at_high_pc, objfile, 0); |
c906108c SS |
1908 | if (symtab != NULL) |
1909 | { | |
c5aa993b JM |
1910 | symtab->language = cu_language; |
1911 | } | |
c906108c SS |
1912 | do_cleanups (back_to); |
1913 | } | |
1914 | ||
1915 | /* | |
1916 | ||
c5aa993b | 1917 | LOCAL FUNCTION |
c906108c | 1918 | |
c5aa993b | 1919 | process_dies -- process a range of DWARF Information Entries |
c906108c | 1920 | |
c5aa993b | 1921 | SYNOPSIS |
c906108c | 1922 | |
c5aa993b JM |
1923 | static void process_dies (char *thisdie, char *enddie, |
1924 | struct objfile *objfile) | |
c906108c | 1925 | |
c5aa993b | 1926 | DESCRIPTION |
c906108c | 1927 | |
c5aa993b JM |
1928 | Process all DIE's in a specified range. May be (and almost |
1929 | certainly will be) called recursively. | |
c906108c SS |
1930 | */ |
1931 | ||
1932 | static void | |
fba45db2 | 1933 | process_dies (char *thisdie, char *enddie, struct objfile *objfile) |
c906108c SS |
1934 | { |
1935 | char *nextdie; | |
1936 | struct dieinfo di; | |
c5aa993b | 1937 | |
c906108c SS |
1938 | while (thisdie < enddie) |
1939 | { | |
1940 | basicdieinfo (&di, thisdie, objfile); | |
1941 | if (di.die_length < SIZEOF_DIE_LENGTH) | |
1942 | { | |
1943 | break; | |
1944 | } | |
1945 | else if (di.die_tag == TAG_padding) | |
1946 | { | |
1947 | nextdie = thisdie + di.die_length; | |
1948 | } | |
1949 | else | |
1950 | { | |
1951 | completedieinfo (&di, objfile); | |
1952 | if (di.at_sibling != 0) | |
1953 | { | |
1954 | nextdie = dbbase + di.at_sibling - dbroff; | |
1955 | } | |
1956 | else | |
1957 | { | |
1958 | nextdie = thisdie + di.die_length; | |
1959 | } | |
c906108c | 1960 | /* I think that these are always text, not data, addresses. */ |
181c1381 RE |
1961 | di.at_low_pc = SMASH_TEXT_ADDRESS (di.at_low_pc); |
1962 | di.at_high_pc = SMASH_TEXT_ADDRESS (di.at_high_pc); | |
c906108c SS |
1963 | switch (di.die_tag) |
1964 | { | |
1965 | case TAG_compile_unit: | |
1966 | /* Skip Tag_compile_unit if we are already inside a compilation | |
c5aa993b JM |
1967 | unit, we are unable to handle nested compilation units |
1968 | properly (FIXME). */ | |
c906108c SS |
1969 | if (current_subfile == NULL) |
1970 | read_file_scope (&di, thisdie, nextdie, objfile); | |
1971 | else | |
1972 | nextdie = thisdie + di.die_length; | |
1973 | break; | |
1974 | case TAG_global_subroutine: | |
1975 | case TAG_subroutine: | |
1976 | if (di.has_at_low_pc) | |
1977 | { | |
1978 | read_func_scope (&di, thisdie, nextdie, objfile); | |
1979 | } | |
1980 | break; | |
1981 | case TAG_lexical_block: | |
1982 | read_lexical_block_scope (&di, thisdie, nextdie, objfile); | |
1983 | break; | |
1984 | case TAG_class_type: | |
1985 | case TAG_structure_type: | |
1986 | case TAG_union_type: | |
1987 | read_structure_scope (&di, thisdie, nextdie, objfile); | |
1988 | break; | |
1989 | case TAG_enumeration_type: | |
1990 | read_enumeration (&di, thisdie, nextdie, objfile); | |
1991 | break; | |
1992 | case TAG_subroutine_type: | |
1993 | read_subroutine_type (&di, thisdie, nextdie); | |
1994 | break; | |
1995 | case TAG_array_type: | |
1996 | dwarf_read_array_type (&di); | |
1997 | break; | |
1998 | case TAG_pointer_type: | |
1999 | read_tag_pointer_type (&di); | |
2000 | break; | |
2001 | case TAG_string_type: | |
2002 | read_tag_string_type (&di); | |
2003 | break; | |
2004 | default: | |
2005 | new_symbol (&di, objfile); | |
2006 | break; | |
2007 | } | |
2008 | } | |
2009 | thisdie = nextdie; | |
2010 | } | |
2011 | } | |
2012 | ||
2013 | /* | |
2014 | ||
c5aa993b | 2015 | LOCAL FUNCTION |
c906108c | 2016 | |
c5aa993b | 2017 | decode_line_numbers -- decode a line number table fragment |
c906108c | 2018 | |
c5aa993b | 2019 | SYNOPSIS |
c906108c | 2020 | |
c5aa993b JM |
2021 | static void decode_line_numbers (char *tblscan, char *tblend, |
2022 | long length, long base, long line, long pc) | |
c906108c | 2023 | |
c5aa993b | 2024 | DESCRIPTION |
c906108c | 2025 | |
c5aa993b | 2026 | Translate the DWARF line number information to gdb form. |
c906108c | 2027 | |
c5aa993b JM |
2028 | The ".line" section contains one or more line number tables, one for |
2029 | each ".line" section from the objects that were linked. | |
c906108c | 2030 | |
c5aa993b JM |
2031 | The AT_stmt_list attribute for each TAG_source_file entry in the |
2032 | ".debug" section contains the offset into the ".line" section for the | |
2033 | start of the table for that file. | |
c906108c | 2034 | |
c5aa993b | 2035 | The table itself has the following structure: |
c906108c | 2036 | |
c5aa993b JM |
2037 | <table length><base address><source statement entry> |
2038 | 4 bytes 4 bytes 10 bytes | |
c906108c | 2039 | |
c5aa993b JM |
2040 | The table length is the total size of the table, including the 4 bytes |
2041 | for the length information. | |
c906108c | 2042 | |
c5aa993b JM |
2043 | The base address is the address of the first instruction generated |
2044 | for the source file. | |
c906108c | 2045 | |
c5aa993b | 2046 | Each source statement entry has the following structure: |
c906108c | 2047 | |
c5aa993b JM |
2048 | <line number><statement position><address delta> |
2049 | 4 bytes 2 bytes 4 bytes | |
c906108c | 2050 | |
c5aa993b JM |
2051 | The line number is relative to the start of the file, starting with |
2052 | line 1. | |
c906108c | 2053 | |
c5aa993b JM |
2054 | The statement position either -1 (0xFFFF) or the number of characters |
2055 | from the beginning of the line to the beginning of the statement. | |
c906108c | 2056 | |
c5aa993b JM |
2057 | The address delta is the difference between the base address and |
2058 | the address of the first instruction for the statement. | |
c906108c | 2059 | |
c5aa993b JM |
2060 | Note that we must copy the bytes from the packed table to our local |
2061 | variables before attempting to use them, to avoid alignment problems | |
2062 | on some machines, particularly RISC processors. | |
c906108c | 2063 | |
c5aa993b | 2064 | BUGS |
c906108c | 2065 | |
c5aa993b JM |
2066 | Does gdb expect the line numbers to be sorted? They are now by |
2067 | chance/luck, but are not required to be. (FIXME) | |
c906108c | 2068 | |
c5aa993b JM |
2069 | The line with number 0 is unused, gdb apparently can discover the |
2070 | span of the last line some other way. How? (FIXME) | |
c906108c SS |
2071 | */ |
2072 | ||
2073 | static void | |
fba45db2 | 2074 | decode_line_numbers (char *linetable) |
c906108c SS |
2075 | { |
2076 | char *tblscan; | |
2077 | char *tblend; | |
2078 | unsigned long length; | |
2079 | unsigned long base; | |
2080 | unsigned long line; | |
2081 | unsigned long pc; | |
c5aa993b | 2082 | |
c906108c SS |
2083 | if (linetable != NULL) |
2084 | { | |
2085 | tblscan = tblend = linetable; | |
2086 | length = target_to_host (tblscan, SIZEOF_LINETBL_LENGTH, GET_UNSIGNED, | |
2087 | current_objfile); | |
2088 | tblscan += SIZEOF_LINETBL_LENGTH; | |
2089 | tblend += length; | |
2090 | base = target_to_host (tblscan, TARGET_FT_POINTER_SIZE (objfile), | |
2091 | GET_UNSIGNED, current_objfile); | |
2092 | tblscan += TARGET_FT_POINTER_SIZE (objfile); | |
2093 | base += baseaddr; | |
2094 | while (tblscan < tblend) | |
2095 | { | |
2096 | line = target_to_host (tblscan, SIZEOF_LINETBL_LINENO, GET_UNSIGNED, | |
2097 | current_objfile); | |
2098 | tblscan += SIZEOF_LINETBL_LINENO + SIZEOF_LINETBL_STMT; | |
2099 | pc = target_to_host (tblscan, SIZEOF_LINETBL_DELTA, GET_UNSIGNED, | |
2100 | current_objfile); | |
2101 | tblscan += SIZEOF_LINETBL_DELTA; | |
2102 | pc += base; | |
2103 | if (line != 0) | |
2104 | { | |
2105 | record_line (current_subfile, line, pc); | |
2106 | } | |
2107 | } | |
2108 | } | |
2109 | } | |
2110 | ||
2111 | /* | |
2112 | ||
c5aa993b | 2113 | LOCAL FUNCTION |
c906108c | 2114 | |
c5aa993b | 2115 | locval -- compute the value of a location attribute |
c906108c | 2116 | |
c5aa993b | 2117 | SYNOPSIS |
c906108c | 2118 | |
c5aa993b | 2119 | static int locval (struct dieinfo *dip) |
c906108c | 2120 | |
c5aa993b | 2121 | DESCRIPTION |
c906108c | 2122 | |
c5aa993b JM |
2123 | Given pointer to a string of bytes that define a location, compute |
2124 | the location and return the value. | |
2125 | A location description containing no atoms indicates that the | |
2126 | object is optimized out. The optimized_out flag is set for those, | |
2127 | the return value is meaningless. | |
c906108c | 2128 | |
c5aa993b JM |
2129 | When computing values involving the current value of the frame pointer, |
2130 | the value zero is used, which results in a value relative to the frame | |
2131 | pointer, rather than the absolute value. This is what GDB wants | |
2132 | anyway. | |
c906108c | 2133 | |
c5aa993b JM |
2134 | When the result is a register number, the isreg flag is set, otherwise |
2135 | it is cleared. This is a kludge until we figure out a better | |
2136 | way to handle the problem. Gdb's design does not mesh well with the | |
2137 | DWARF notion of a location computing interpreter, which is a shame | |
2138 | because the flexibility goes unused. | |
2139 | ||
2140 | NOTES | |
2141 | ||
2142 | Note that stack[0] is unused except as a default error return. | |
2143 | Note that stack overflow is not yet handled. | |
c906108c SS |
2144 | */ |
2145 | ||
2146 | static int | |
fba45db2 | 2147 | locval (struct dieinfo *dip) |
c906108c SS |
2148 | { |
2149 | unsigned short nbytes; | |
2150 | unsigned short locsize; | |
2151 | auto long stack[64]; | |
2152 | int stacki; | |
2153 | char *loc; | |
2154 | char *end; | |
2155 | int loc_atom_code; | |
2156 | int loc_value_size; | |
c5aa993b JM |
2157 | |
2158 | loc = dip->at_location; | |
c906108c SS |
2159 | nbytes = attribute_size (AT_location); |
2160 | locsize = target_to_host (loc, nbytes, GET_UNSIGNED, current_objfile); | |
2161 | loc += nbytes; | |
2162 | end = loc + locsize; | |
2163 | stacki = 0; | |
2164 | stack[stacki] = 0; | |
c5aa993b JM |
2165 | dip->isreg = 0; |
2166 | dip->offreg = 0; | |
2167 | dip->optimized_out = 1; | |
c906108c SS |
2168 | loc_value_size = TARGET_FT_LONG_SIZE (current_objfile); |
2169 | while (loc < end) | |
2170 | { | |
c5aa993b | 2171 | dip->optimized_out = 0; |
c906108c SS |
2172 | loc_atom_code = target_to_host (loc, SIZEOF_LOC_ATOM_CODE, GET_UNSIGNED, |
2173 | current_objfile); | |
2174 | loc += SIZEOF_LOC_ATOM_CODE; | |
2175 | switch (loc_atom_code) | |
2176 | { | |
c5aa993b JM |
2177 | case 0: |
2178 | /* error */ | |
2179 | loc = end; | |
2180 | break; | |
2181 | case OP_REG: | |
2182 | /* push register (number) */ | |
2183 | stack[++stacki] | |
2184 | = DWARF_REG_TO_REGNUM (target_to_host (loc, loc_value_size, | |
2185 | GET_UNSIGNED, | |
2186 | current_objfile)); | |
2187 | loc += loc_value_size; | |
2188 | dip->isreg = 1; | |
2189 | break; | |
2190 | case OP_BASEREG: | |
2191 | /* push value of register (number) */ | |
2192 | /* Actually, we compute the value as if register has 0, so the | |
2193 | value ends up being the offset from that register. */ | |
2194 | dip->offreg = 1; | |
2195 | dip->basereg = target_to_host (loc, loc_value_size, GET_UNSIGNED, | |
2196 | current_objfile); | |
2197 | loc += loc_value_size; | |
2198 | stack[++stacki] = 0; | |
2199 | break; | |
2200 | case OP_ADDR: | |
2201 | /* push address (relocated address) */ | |
2202 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2203 | GET_UNSIGNED, current_objfile); | |
2204 | loc += loc_value_size; | |
2205 | break; | |
2206 | case OP_CONST: | |
2207 | /* push constant (number) FIXME: signed or unsigned! */ | |
2208 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2209 | GET_SIGNED, current_objfile); | |
2210 | loc += loc_value_size; | |
2211 | break; | |
2212 | case OP_DEREF2: | |
2213 | /* pop, deref and push 2 bytes (as a long) */ | |
23136709 KB |
2214 | complaint (&symfile_complaints, |
2215 | "DIE @ 0x%x \"%s\", OP_DEREF2 address 0x%lx not handled", | |
2216 | DIE_ID, DIE_NAME, stack[stacki]); | |
c5aa993b JM |
2217 | break; |
2218 | case OP_DEREF4: /* pop, deref and push 4 bytes (as a long) */ | |
23136709 KB |
2219 | complaint (&symfile_complaints, |
2220 | "DIE @ 0x%x \"%s\", OP_DEREF4 address 0x%lx not handled", | |
2221 | DIE_ID, DIE_NAME, stack[stacki]); | |
c5aa993b JM |
2222 | break; |
2223 | case OP_ADD: /* pop top 2 items, add, push result */ | |
2224 | stack[stacki - 1] += stack[stacki]; | |
2225 | stacki--; | |
2226 | break; | |
c906108c SS |
2227 | } |
2228 | } | |
2229 | return (stack[stacki]); | |
2230 | } | |
2231 | ||
2232 | /* | |
2233 | ||
c5aa993b | 2234 | LOCAL FUNCTION |
c906108c | 2235 | |
c5aa993b | 2236 | read_ofile_symtab -- build a full symtab entry from chunk of DIE's |
c906108c | 2237 | |
c5aa993b | 2238 | SYNOPSIS |
c906108c | 2239 | |
c5aa993b | 2240 | static void read_ofile_symtab (struct partial_symtab *pst) |
c906108c | 2241 | |
c5aa993b | 2242 | DESCRIPTION |
c906108c | 2243 | |
c5aa993b JM |
2244 | When expanding a partial symbol table entry to a full symbol table |
2245 | entry, this is the function that gets called to read in the symbols | |
2246 | for the compilation unit. A pointer to the newly constructed symtab, | |
2247 | which is now the new first one on the objfile's symtab list, is | |
2248 | stashed in the partial symbol table entry. | |
c906108c SS |
2249 | */ |
2250 | ||
2251 | static void | |
fba45db2 | 2252 | read_ofile_symtab (struct partial_symtab *pst) |
c906108c SS |
2253 | { |
2254 | struct cleanup *back_to; | |
2255 | unsigned long lnsize; | |
2256 | file_ptr foffset; | |
2257 | bfd *abfd; | |
2258 | char lnsizedata[SIZEOF_LINETBL_LENGTH]; | |
2259 | ||
c5aa993b JM |
2260 | abfd = pst->objfile->obfd; |
2261 | current_objfile = pst->objfile; | |
c906108c SS |
2262 | |
2263 | /* Allocate a buffer for the entire chunk of DIE's for this compilation | |
2264 | unit, seek to the location in the file, and read in all the DIE's. */ | |
2265 | ||
2266 | diecount = 0; | |
2267 | dbsize = DBLENGTH (pst); | |
2268 | dbbase = xmalloc (dbsize); | |
c5aa993b JM |
2269 | dbroff = DBROFF (pst); |
2270 | foffset = DBFOFF (pst) + dbroff; | |
c906108c SS |
2271 | base_section_offsets = pst->section_offsets; |
2272 | baseaddr = ANOFFSET (pst->section_offsets, 0); | |
2273 | if (bfd_seek (abfd, foffset, SEEK_SET) || | |
3a42e9d0 | 2274 | (bfd_bread (dbbase, dbsize, abfd) != dbsize)) |
c906108c | 2275 | { |
b8c9b27d | 2276 | xfree (dbbase); |
c906108c SS |
2277 | error ("can't read DWARF data"); |
2278 | } | |
b8c9b27d | 2279 | back_to = make_cleanup (xfree, dbbase); |
c906108c SS |
2280 | |
2281 | /* If there is a line number table associated with this compilation unit | |
2282 | then read the size of this fragment in bytes, from the fragment itself. | |
2283 | Allocate a buffer for the fragment and read it in for future | |
2284 | processing. */ | |
2285 | ||
2286 | lnbase = NULL; | |
2287 | if (LNFOFF (pst)) | |
2288 | { | |
2289 | if (bfd_seek (abfd, LNFOFF (pst), SEEK_SET) || | |
4efb68b1 | 2290 | (bfd_bread (lnsizedata, sizeof (lnsizedata), abfd) |
3a42e9d0 | 2291 | != sizeof (lnsizedata))) |
c906108c SS |
2292 | { |
2293 | error ("can't read DWARF line number table size"); | |
2294 | } | |
2295 | lnsize = target_to_host (lnsizedata, SIZEOF_LINETBL_LENGTH, | |
c5aa993b | 2296 | GET_UNSIGNED, pst->objfile); |
c906108c SS |
2297 | lnbase = xmalloc (lnsize); |
2298 | if (bfd_seek (abfd, LNFOFF (pst), SEEK_SET) || | |
3a42e9d0 | 2299 | (bfd_bread (lnbase, lnsize, abfd) != lnsize)) |
c906108c | 2300 | { |
b8c9b27d | 2301 | xfree (lnbase); |
c906108c SS |
2302 | error ("can't read DWARF line numbers"); |
2303 | } | |
b8c9b27d | 2304 | make_cleanup (xfree, lnbase); |
c906108c SS |
2305 | } |
2306 | ||
c5aa993b | 2307 | process_dies (dbbase, dbbase + dbsize, pst->objfile); |
c906108c SS |
2308 | do_cleanups (back_to); |
2309 | current_objfile = NULL; | |
c5aa993b | 2310 | pst->symtab = pst->objfile->symtabs; |
c906108c SS |
2311 | } |
2312 | ||
2313 | /* | |
2314 | ||
c5aa993b | 2315 | LOCAL FUNCTION |
c906108c | 2316 | |
c5aa993b | 2317 | psymtab_to_symtab_1 -- do grunt work for building a full symtab entry |
c906108c | 2318 | |
c5aa993b | 2319 | SYNOPSIS |
c906108c | 2320 | |
c5aa993b | 2321 | static void psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 2322 | |
c5aa993b | 2323 | DESCRIPTION |
c906108c | 2324 | |
c5aa993b JM |
2325 | Called once for each partial symbol table entry that needs to be |
2326 | expanded into a full symbol table entry. | |
c906108c | 2327 | |
c5aa993b | 2328 | */ |
c906108c SS |
2329 | |
2330 | static void | |
fba45db2 | 2331 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c SS |
2332 | { |
2333 | int i; | |
2334 | struct cleanup *old_chain; | |
c5aa993b | 2335 | |
c906108c SS |
2336 | if (pst != NULL) |
2337 | { | |
2338 | if (pst->readin) | |
2339 | { | |
2340 | warning ("psymtab for %s already read in. Shouldn't happen.", | |
c5aa993b | 2341 | pst->filename); |
c906108c SS |
2342 | } |
2343 | else | |
2344 | { | |
2345 | /* Read in all partial symtabs on which this one is dependent */ | |
c5aa993b | 2346 | for (i = 0; i < pst->number_of_dependencies; i++) |
c906108c | 2347 | { |
c5aa993b | 2348 | if (!pst->dependencies[i]->readin) |
c906108c SS |
2349 | { |
2350 | /* Inform about additional files that need to be read in. */ | |
2351 | if (info_verbose) | |
2352 | { | |
2353 | fputs_filtered (" ", gdb_stdout); | |
2354 | wrap_here (""); | |
2355 | fputs_filtered ("and ", gdb_stdout); | |
2356 | wrap_here (""); | |
2357 | printf_filtered ("%s...", | |
c5aa993b | 2358 | pst->dependencies[i]->filename); |
c906108c | 2359 | wrap_here (""); |
c5aa993b | 2360 | gdb_flush (gdb_stdout); /* Flush output */ |
c906108c | 2361 | } |
c5aa993b | 2362 | psymtab_to_symtab_1 (pst->dependencies[i]); |
c906108c | 2363 | } |
c5aa993b JM |
2364 | } |
2365 | if (DBLENGTH (pst)) /* Otherwise it's a dummy */ | |
c906108c SS |
2366 | { |
2367 | buildsym_init (); | |
a0b3c4fd | 2368 | old_chain = make_cleanup (really_free_pendings, 0); |
c906108c SS |
2369 | read_ofile_symtab (pst); |
2370 | if (info_verbose) | |
2371 | { | |
2372 | printf_filtered ("%d DIE's, sorting...", diecount); | |
2373 | wrap_here (""); | |
2374 | gdb_flush (gdb_stdout); | |
2375 | } | |
c906108c SS |
2376 | do_cleanups (old_chain); |
2377 | } | |
c5aa993b | 2378 | pst->readin = 1; |
c906108c SS |
2379 | } |
2380 | } | |
2381 | } | |
2382 | ||
2383 | /* | |
2384 | ||
c5aa993b | 2385 | LOCAL FUNCTION |
c906108c | 2386 | |
c5aa993b | 2387 | dwarf_psymtab_to_symtab -- build a full symtab entry from partial one |
c906108c | 2388 | |
c5aa993b | 2389 | SYNOPSIS |
c906108c | 2390 | |
c5aa993b | 2391 | static void dwarf_psymtab_to_symtab (struct partial_symtab *pst) |
c906108c | 2392 | |
c5aa993b | 2393 | DESCRIPTION |
c906108c | 2394 | |
c5aa993b JM |
2395 | This is the DWARF support entry point for building a full symbol |
2396 | table entry from a partial symbol table entry. We are passed a | |
2397 | pointer to the partial symbol table entry that needs to be expanded. | |
c906108c | 2398 | |
c5aa993b | 2399 | */ |
c906108c SS |
2400 | |
2401 | static void | |
fba45db2 | 2402 | dwarf_psymtab_to_symtab (struct partial_symtab *pst) |
c906108c SS |
2403 | { |
2404 | ||
2405 | if (pst != NULL) | |
2406 | { | |
c5aa993b | 2407 | if (pst->readin) |
c906108c SS |
2408 | { |
2409 | warning ("psymtab for %s already read in. Shouldn't happen.", | |
c5aa993b | 2410 | pst->filename); |
c906108c SS |
2411 | } |
2412 | else | |
2413 | { | |
c5aa993b | 2414 | if (DBLENGTH (pst) || pst->number_of_dependencies) |
c906108c SS |
2415 | { |
2416 | /* Print the message now, before starting serious work, to avoid | |
c5aa993b | 2417 | disconcerting pauses. */ |
c906108c SS |
2418 | if (info_verbose) |
2419 | { | |
2420 | printf_filtered ("Reading in symbols for %s...", | |
c5aa993b | 2421 | pst->filename); |
c906108c SS |
2422 | gdb_flush (gdb_stdout); |
2423 | } | |
c5aa993b | 2424 | |
c906108c | 2425 | psymtab_to_symtab_1 (pst); |
c5aa993b JM |
2426 | |
2427 | #if 0 /* FIXME: Check to see what dbxread is doing here and see if | |
2428 | we need to do an equivalent or is this something peculiar to | |
2429 | stabs/a.out format. | |
2430 | Match with global symbols. This only needs to be done once, | |
2431 | after all of the symtabs and dependencies have been read in. | |
2432 | */ | |
2433 | scan_file_globals (pst->objfile); | |
c906108c | 2434 | #endif |
c5aa993b | 2435 | |
c906108c SS |
2436 | /* Finish up the verbose info message. */ |
2437 | if (info_verbose) | |
2438 | { | |
2439 | printf_filtered ("done.\n"); | |
2440 | gdb_flush (gdb_stdout); | |
2441 | } | |
2442 | } | |
2443 | } | |
2444 | } | |
2445 | } | |
2446 | ||
2447 | /* | |
2448 | ||
c5aa993b | 2449 | LOCAL FUNCTION |
c906108c | 2450 | |
c5aa993b | 2451 | add_enum_psymbol -- add enumeration members to partial symbol table |
c906108c | 2452 | |
c5aa993b | 2453 | DESCRIPTION |
c906108c | 2454 | |
c5aa993b JM |
2455 | Given pointer to a DIE that is known to be for an enumeration, |
2456 | extract the symbolic names of the enumeration members and add | |
2457 | partial symbols for them. | |
2458 | */ | |
c906108c SS |
2459 | |
2460 | static void | |
fba45db2 | 2461 | add_enum_psymbol (struct dieinfo *dip, struct objfile *objfile) |
c906108c SS |
2462 | { |
2463 | char *scan; | |
2464 | char *listend; | |
2465 | unsigned short blocksz; | |
2466 | int nbytes; | |
c5aa993b | 2467 | |
b59661bd AC |
2468 | scan = dip->at_element_list; |
2469 | if (scan != NULL) | |
c906108c | 2470 | { |
c5aa993b | 2471 | if (dip->short_element_list) |
c906108c SS |
2472 | { |
2473 | nbytes = attribute_size (AT_short_element_list); | |
2474 | } | |
2475 | else | |
2476 | { | |
2477 | nbytes = attribute_size (AT_element_list); | |
2478 | } | |
2479 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); | |
2480 | scan += nbytes; | |
2481 | listend = scan + blocksz; | |
2482 | while (scan < listend) | |
2483 | { | |
2484 | scan += TARGET_FT_LONG_SIZE (objfile); | |
176620f1 | 2485 | add_psymbol_to_list (scan, strlen (scan), VAR_DOMAIN, LOC_CONST, |
c5aa993b | 2486 | &objfile->static_psymbols, 0, 0, cu_language, |
c906108c SS |
2487 | objfile); |
2488 | scan += strlen (scan) + 1; | |
2489 | } | |
2490 | } | |
2491 | } | |
2492 | ||
2493 | /* | |
2494 | ||
c5aa993b | 2495 | LOCAL FUNCTION |
c906108c | 2496 | |
c5aa993b | 2497 | add_partial_symbol -- add symbol to partial symbol table |
c906108c | 2498 | |
c5aa993b | 2499 | DESCRIPTION |
c906108c | 2500 | |
c5aa993b JM |
2501 | Given a DIE, if it is one of the types that we want to |
2502 | add to a partial symbol table, finish filling in the die info | |
2503 | and then add a partial symbol table entry for it. | |
c906108c | 2504 | |
c5aa993b | 2505 | NOTES |
c906108c | 2506 | |
c5aa993b JM |
2507 | The caller must ensure that the DIE has a valid name attribute. |
2508 | */ | |
c906108c SS |
2509 | |
2510 | static void | |
fba45db2 | 2511 | add_partial_symbol (struct dieinfo *dip, struct objfile *objfile) |
c906108c | 2512 | { |
c5aa993b | 2513 | switch (dip->die_tag) |
c906108c SS |
2514 | { |
2515 | case TAG_global_subroutine: | |
c5aa993b | 2516 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
176620f1 | 2517 | VAR_DOMAIN, LOC_BLOCK, |
c5aa993b JM |
2518 | &objfile->global_psymbols, |
2519 | 0, dip->at_low_pc, cu_language, objfile); | |
c906108c SS |
2520 | break; |
2521 | case TAG_global_variable: | |
c5aa993b | 2522 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
176620f1 | 2523 | VAR_DOMAIN, LOC_STATIC, |
c5aa993b | 2524 | &objfile->global_psymbols, |
c906108c SS |
2525 | 0, 0, cu_language, objfile); |
2526 | break; | |
2527 | case TAG_subroutine: | |
c5aa993b | 2528 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
176620f1 | 2529 | VAR_DOMAIN, LOC_BLOCK, |
c5aa993b JM |
2530 | &objfile->static_psymbols, |
2531 | 0, dip->at_low_pc, cu_language, objfile); | |
c906108c SS |
2532 | break; |
2533 | case TAG_local_variable: | |
c5aa993b | 2534 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
176620f1 | 2535 | VAR_DOMAIN, LOC_STATIC, |
c5aa993b | 2536 | &objfile->static_psymbols, |
c906108c SS |
2537 | 0, 0, cu_language, objfile); |
2538 | break; | |
2539 | case TAG_typedef: | |
c5aa993b | 2540 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
176620f1 | 2541 | VAR_DOMAIN, LOC_TYPEDEF, |
c5aa993b | 2542 | &objfile->static_psymbols, |
c906108c SS |
2543 | 0, 0, cu_language, objfile); |
2544 | break; | |
2545 | case TAG_class_type: | |
2546 | case TAG_structure_type: | |
2547 | case TAG_union_type: | |
2548 | case TAG_enumeration_type: | |
2549 | /* Do not add opaque aggregate definitions to the psymtab. */ | |
c5aa993b | 2550 | if (!dip->has_at_byte_size) |
c906108c | 2551 | break; |
c5aa993b | 2552 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
176620f1 | 2553 | STRUCT_DOMAIN, LOC_TYPEDEF, |
c5aa993b | 2554 | &objfile->static_psymbols, |
c906108c SS |
2555 | 0, 0, cu_language, objfile); |
2556 | if (cu_language == language_cplus) | |
2557 | { | |
2558 | /* For C++, these implicitly act as typedefs as well. */ | |
c5aa993b | 2559 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
176620f1 | 2560 | VAR_DOMAIN, LOC_TYPEDEF, |
c5aa993b | 2561 | &objfile->static_psymbols, |
c906108c SS |
2562 | 0, 0, cu_language, objfile); |
2563 | } | |
2564 | break; | |
2565 | } | |
2566 | } | |
9846de1b | 2567 | /* *INDENT-OFF* */ |
c906108c SS |
2568 | /* |
2569 | ||
2570 | LOCAL FUNCTION | |
2571 | ||
2572 | scan_partial_symbols -- scan DIE's within a single compilation unit | |
2573 | ||
2574 | DESCRIPTION | |
2575 | ||
2576 | Process the DIE's within a single compilation unit, looking for | |
2577 | interesting DIE's that contribute to the partial symbol table entry | |
2578 | for this compilation unit. | |
2579 | ||
2580 | NOTES | |
2581 | ||
2582 | There are some DIE's that may appear both at file scope and within | |
2583 | the scope of a function. We are only interested in the ones at file | |
2584 | scope, and the only way to tell them apart is to keep track of the | |
2585 | scope. For example, consider the test case: | |
2586 | ||
2587 | static int i; | |
2588 | main () { int j; } | |
2589 | ||
2590 | for which the relevant DWARF segment has the structure: | |
2591 | ||
2592 | 0x51: | |
2593 | 0x23 global subrtn sibling 0x9b | |
2594 | name main | |
2595 | fund_type FT_integer | |
2596 | low_pc 0x800004cc | |
2597 | high_pc 0x800004d4 | |
2598 | ||
2599 | 0x74: | |
2600 | 0x23 local var sibling 0x97 | |
2601 | name j | |
2602 | fund_type FT_integer | |
2603 | location OP_BASEREG 0xe | |
2604 | OP_CONST 0xfffffffc | |
2605 | OP_ADD | |
2606 | 0x97: | |
2607 | 0x4 | |
2608 | ||
2609 | 0x9b: | |
2610 | 0x1d local var sibling 0xb8 | |
2611 | name i | |
2612 | fund_type FT_integer | |
2613 | location OP_ADDR 0x800025dc | |
2614 | ||
2615 | 0xb8: | |
2616 | 0x4 | |
2617 | ||
2618 | We want to include the symbol 'i' in the partial symbol table, but | |
2619 | not the symbol 'j'. In essence, we want to skip all the dies within | |
2620 | the scope of a TAG_global_subroutine DIE. | |
2621 | ||
2622 | Don't attempt to add anonymous structures or unions since they have | |
2623 | no name. Anonymous enumerations however are processed, because we | |
2624 | want to extract their member names (the check for a tag name is | |
2625 | done later). | |
2626 | ||
2627 | Also, for variables and subroutines, check that this is the place | |
2628 | where the actual definition occurs, rather than just a reference | |
2629 | to an external. | |
2630 | */ | |
9846de1b | 2631 | /* *INDENT-ON* */ |
c906108c | 2632 | |
c5aa993b JM |
2633 | |
2634 | ||
c906108c | 2635 | static void |
fba45db2 | 2636 | scan_partial_symbols (char *thisdie, char *enddie, struct objfile *objfile) |
c906108c SS |
2637 | { |
2638 | char *nextdie; | |
2639 | char *temp; | |
2640 | struct dieinfo di; | |
c5aa993b | 2641 | |
c906108c SS |
2642 | while (thisdie < enddie) |
2643 | { | |
2644 | basicdieinfo (&di, thisdie, objfile); | |
2645 | if (di.die_length < SIZEOF_DIE_LENGTH) | |
2646 | { | |
2647 | break; | |
2648 | } | |
2649 | else | |
2650 | { | |
2651 | nextdie = thisdie + di.die_length; | |
2652 | /* To avoid getting complete die information for every die, we | |
2653 | only do it (below) for the cases we are interested in. */ | |
2654 | switch (di.die_tag) | |
2655 | { | |
2656 | case TAG_global_subroutine: | |
2657 | case TAG_subroutine: | |
2658 | completedieinfo (&di, objfile); | |
2659 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2660 | { | |
2661 | add_partial_symbol (&di, objfile); | |
2662 | /* If there is a sibling attribute, adjust the nextdie | |
2663 | pointer to skip the entire scope of the subroutine. | |
2664 | Apply some sanity checking to make sure we don't | |
2665 | overrun or underrun the range of remaining DIE's */ | |
2666 | if (di.at_sibling != 0) | |
2667 | { | |
2668 | temp = dbbase + di.at_sibling - dbroff; | |
2669 | if ((temp < thisdie) || (temp >= enddie)) | |
2670 | { | |
23136709 KB |
2671 | bad_die_ref_complaint (DIE_ID, DIE_NAME, |
2672 | di.at_sibling); | |
c906108c SS |
2673 | } |
2674 | else | |
2675 | { | |
2676 | nextdie = temp; | |
2677 | } | |
2678 | } | |
2679 | } | |
2680 | break; | |
2681 | case TAG_global_variable: | |
2682 | case TAG_local_variable: | |
2683 | completedieinfo (&di, objfile); | |
2684 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2685 | { | |
2686 | add_partial_symbol (&di, objfile); | |
2687 | } | |
2688 | break; | |
2689 | case TAG_typedef: | |
2690 | case TAG_class_type: | |
2691 | case TAG_structure_type: | |
2692 | case TAG_union_type: | |
2693 | completedieinfo (&di, objfile); | |
2694 | if (di.at_name) | |
2695 | { | |
2696 | add_partial_symbol (&di, objfile); | |
2697 | } | |
2698 | break; | |
2699 | case TAG_enumeration_type: | |
2700 | completedieinfo (&di, objfile); | |
2701 | if (di.at_name) | |
2702 | { | |
2703 | add_partial_symbol (&di, objfile); | |
2704 | } | |
2705 | add_enum_psymbol (&di, objfile); | |
2706 | break; | |
2707 | } | |
2708 | } | |
2709 | thisdie = nextdie; | |
2710 | } | |
2711 | } | |
2712 | ||
2713 | /* | |
2714 | ||
c5aa993b | 2715 | LOCAL FUNCTION |
c906108c | 2716 | |
c5aa993b | 2717 | scan_compilation_units -- build a psymtab entry for each compilation |
c906108c | 2718 | |
c5aa993b | 2719 | DESCRIPTION |
c906108c | 2720 | |
c5aa993b JM |
2721 | This is the top level dwarf parsing routine for building partial |
2722 | symbol tables. | |
c906108c | 2723 | |
c5aa993b JM |
2724 | It scans from the beginning of the DWARF table looking for the first |
2725 | TAG_compile_unit DIE, and then follows the sibling chain to locate | |
2726 | each additional TAG_compile_unit DIE. | |
2727 | ||
2728 | For each TAG_compile_unit DIE it creates a partial symtab structure, | |
2729 | calls a subordinate routine to collect all the compilation unit's | |
2730 | global DIE's, file scope DIEs, typedef DIEs, etc, and then links the | |
2731 | new partial symtab structure into the partial symbol table. It also | |
2732 | records the appropriate information in the partial symbol table entry | |
2733 | to allow the chunk of DIE's and line number table for this compilation | |
2734 | unit to be located and re-read later, to generate a complete symbol | |
2735 | table entry for the compilation unit. | |
2736 | ||
2737 | Thus it effectively partitions up a chunk of DIE's for multiple | |
2738 | compilation units into smaller DIE chunks and line number tables, | |
2739 | and associates them with a partial symbol table entry. | |
2740 | ||
2741 | NOTES | |
c906108c | 2742 | |
c5aa993b JM |
2743 | If any compilation unit has no line number table associated with |
2744 | it for some reason (a missing at_stmt_list attribute, rather than | |
2745 | just one with a value of zero, which is valid) then we ensure that | |
2746 | the recorded file offset is zero so that the routine which later | |
2747 | reads line number table fragments knows that there is no fragment | |
2748 | to read. | |
c906108c | 2749 | |
c5aa993b | 2750 | RETURNS |
c906108c | 2751 | |
c5aa993b | 2752 | Returns no value. |
c906108c SS |
2753 | |
2754 | */ | |
2755 | ||
2756 | static void | |
fba45db2 KB |
2757 | scan_compilation_units (char *thisdie, char *enddie, file_ptr dbfoff, |
2758 | file_ptr lnoffset, struct objfile *objfile) | |
c906108c SS |
2759 | { |
2760 | char *nextdie; | |
2761 | struct dieinfo di; | |
2762 | struct partial_symtab *pst; | |
2763 | int culength; | |
2764 | int curoff; | |
2765 | file_ptr curlnoffset; | |
2766 | ||
2767 | while (thisdie < enddie) | |
2768 | { | |
2769 | basicdieinfo (&di, thisdie, objfile); | |
2770 | if (di.die_length < SIZEOF_DIE_LENGTH) | |
2771 | { | |
2772 | break; | |
2773 | } | |
2774 | else if (di.die_tag != TAG_compile_unit) | |
2775 | { | |
2776 | nextdie = thisdie + di.die_length; | |
2777 | } | |
2778 | else | |
2779 | { | |
2780 | completedieinfo (&di, objfile); | |
2781 | set_cu_language (&di); | |
2782 | if (di.at_sibling != 0) | |
2783 | { | |
2784 | nextdie = dbbase + di.at_sibling - dbroff; | |
2785 | } | |
2786 | else | |
2787 | { | |
2788 | nextdie = thisdie + di.die_length; | |
2789 | } | |
2790 | curoff = thisdie - dbbase; | |
2791 | culength = nextdie - thisdie; | |
2792 | curlnoffset = di.has_at_stmt_list ? lnoffset + di.at_stmt_list : 0; | |
2793 | ||
2794 | /* First allocate a new partial symbol table structure */ | |
2795 | ||
2796 | pst = start_psymtab_common (objfile, base_section_offsets, | |
2797 | di.at_name, di.at_low_pc, | |
c5aa993b JM |
2798 | objfile->global_psymbols.next, |
2799 | objfile->static_psymbols.next); | |
c906108c | 2800 | |
c5aa993b JM |
2801 | pst->texthigh = di.at_high_pc; |
2802 | pst->read_symtab_private = (char *) | |
2803 | obstack_alloc (&objfile->psymbol_obstack, | |
2804 | sizeof (struct dwfinfo)); | |
c906108c SS |
2805 | DBFOFF (pst) = dbfoff; |
2806 | DBROFF (pst) = curoff; | |
2807 | DBLENGTH (pst) = culength; | |
c5aa993b JM |
2808 | LNFOFF (pst) = curlnoffset; |
2809 | pst->read_symtab = dwarf_psymtab_to_symtab; | |
c906108c SS |
2810 | |
2811 | /* Now look for partial symbols */ | |
2812 | ||
2813 | scan_partial_symbols (thisdie + di.die_length, nextdie, objfile); | |
2814 | ||
c5aa993b JM |
2815 | pst->n_global_syms = objfile->global_psymbols.next - |
2816 | (objfile->global_psymbols.list + pst->globals_offset); | |
2817 | pst->n_static_syms = objfile->static_psymbols.next - | |
2818 | (objfile->static_psymbols.list + pst->statics_offset); | |
c906108c SS |
2819 | sort_pst_symbols (pst); |
2820 | /* If there is already a psymtab or symtab for a file of this name, | |
2821 | remove it. (If there is a symtab, more drastic things also | |
2822 | happen.) This happens in VxWorks. */ | |
c5aa993b | 2823 | free_named_symtabs (pst->filename); |
c906108c | 2824 | } |
c5aa993b | 2825 | thisdie = nextdie; |
c906108c SS |
2826 | } |
2827 | } | |
2828 | ||
2829 | /* | |
2830 | ||
c5aa993b | 2831 | LOCAL FUNCTION |
c906108c | 2832 | |
c5aa993b | 2833 | new_symbol -- make a symbol table entry for a new symbol |
c906108c | 2834 | |
c5aa993b | 2835 | SYNOPSIS |
c906108c | 2836 | |
c5aa993b JM |
2837 | static struct symbol *new_symbol (struct dieinfo *dip, |
2838 | struct objfile *objfile) | |
c906108c | 2839 | |
c5aa993b | 2840 | DESCRIPTION |
c906108c | 2841 | |
c5aa993b JM |
2842 | Given a pointer to a DWARF information entry, figure out if we need |
2843 | to make a symbol table entry for it, and if so, create a new entry | |
2844 | and return a pointer to it. | |
c906108c SS |
2845 | */ |
2846 | ||
2847 | static struct symbol * | |
fba45db2 | 2848 | new_symbol (struct dieinfo *dip, struct objfile *objfile) |
c906108c SS |
2849 | { |
2850 | struct symbol *sym = NULL; | |
c5aa993b JM |
2851 | |
2852 | if (dip->at_name != NULL) | |
c906108c | 2853 | { |
c5aa993b | 2854 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
c906108c SS |
2855 | sizeof (struct symbol)); |
2856 | OBJSTAT (objfile, n_syms++); | |
2857 | memset (sym, 0, sizeof (struct symbol)); | |
c906108c | 2858 | /* default assumptions */ |
176620f1 | 2859 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
c906108c SS |
2860 | SYMBOL_CLASS (sym) = LOC_STATIC; |
2861 | SYMBOL_TYPE (sym) = decode_die_type (dip); | |
2862 | ||
2863 | /* If this symbol is from a C++ compilation, then attempt to cache the | |
c5aa993b JM |
2864 | demangled form for future reference. This is a typical time versus |
2865 | space tradeoff, that was decided in favor of time because it sped up | |
2866 | C++ symbol lookups by a factor of about 20. */ | |
c906108c SS |
2867 | |
2868 | SYMBOL_LANGUAGE (sym) = cu_language; | |
2de7ced7 | 2869 | SYMBOL_SET_NAMES (sym, dip->at_name, strlen (dip->at_name), objfile); |
c5aa993b | 2870 | switch (dip->die_tag) |
c906108c SS |
2871 | { |
2872 | case TAG_label: | |
c5aa993b | 2873 | SYMBOL_VALUE_ADDRESS (sym) = dip->at_low_pc; |
c906108c SS |
2874 | SYMBOL_CLASS (sym) = LOC_LABEL; |
2875 | break; | |
2876 | case TAG_global_subroutine: | |
2877 | case TAG_subroutine: | |
c5aa993b | 2878 | SYMBOL_VALUE_ADDRESS (sym) = dip->at_low_pc; |
c906108c | 2879 | SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym)); |
c5aa993b | 2880 | if (dip->at_prototyped) |
c906108c SS |
2881 | TYPE_FLAGS (SYMBOL_TYPE (sym)) |= TYPE_FLAG_PROTOTYPED; |
2882 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
c5aa993b | 2883 | if (dip->die_tag == TAG_global_subroutine) |
c906108c SS |
2884 | { |
2885 | add_symbol_to_list (sym, &global_symbols); | |
2886 | } | |
2887 | else | |
2888 | { | |
2889 | add_symbol_to_list (sym, list_in_scope); | |
2890 | } | |
2891 | break; | |
2892 | case TAG_global_variable: | |
c5aa993b | 2893 | if (dip->at_location != NULL) |
c906108c SS |
2894 | { |
2895 | SYMBOL_VALUE_ADDRESS (sym) = locval (dip); | |
2896 | add_symbol_to_list (sym, &global_symbols); | |
2897 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2898 | SYMBOL_VALUE (sym) += baseaddr; | |
2899 | } | |
2900 | break; | |
2901 | case TAG_local_variable: | |
c5aa993b | 2902 | if (dip->at_location != NULL) |
c906108c SS |
2903 | { |
2904 | int loc = locval (dip); | |
c5aa993b | 2905 | if (dip->optimized_out) |
c906108c SS |
2906 | { |
2907 | SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; | |
2908 | } | |
c5aa993b | 2909 | else if (dip->isreg) |
c906108c SS |
2910 | { |
2911 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
2912 | } | |
c5aa993b | 2913 | else if (dip->offreg) |
c906108c SS |
2914 | { |
2915 | SYMBOL_CLASS (sym) = LOC_BASEREG; | |
c5aa993b | 2916 | SYMBOL_BASEREG (sym) = dip->basereg; |
c906108c SS |
2917 | } |
2918 | else | |
2919 | { | |
2920 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2921 | SYMBOL_VALUE (sym) += baseaddr; | |
2922 | } | |
2923 | if (SYMBOL_CLASS (sym) == LOC_STATIC) | |
2924 | { | |
2925 | /* LOC_STATIC address class MUST use SYMBOL_VALUE_ADDRESS, | |
2926 | which may store to a bigger location than SYMBOL_VALUE. */ | |
2927 | SYMBOL_VALUE_ADDRESS (sym) = loc; | |
2928 | } | |
2929 | else | |
2930 | { | |
2931 | SYMBOL_VALUE (sym) = loc; | |
2932 | } | |
2933 | add_symbol_to_list (sym, list_in_scope); | |
2934 | } | |
2935 | break; | |
2936 | case TAG_formal_parameter: | |
c5aa993b | 2937 | if (dip->at_location != NULL) |
c906108c SS |
2938 | { |
2939 | SYMBOL_VALUE (sym) = locval (dip); | |
2940 | } | |
2941 | add_symbol_to_list (sym, list_in_scope); | |
c5aa993b | 2942 | if (dip->isreg) |
c906108c SS |
2943 | { |
2944 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
2945 | } | |
c5aa993b | 2946 | else if (dip->offreg) |
c906108c SS |
2947 | { |
2948 | SYMBOL_CLASS (sym) = LOC_BASEREG_ARG; | |
c5aa993b | 2949 | SYMBOL_BASEREG (sym) = dip->basereg; |
c906108c SS |
2950 | } |
2951 | else | |
2952 | { | |
2953 | SYMBOL_CLASS (sym) = LOC_ARG; | |
2954 | } | |
2955 | break; | |
2956 | case TAG_unspecified_parameters: | |
2957 | /* From varargs functions; gdb doesn't seem to have any interest in | |
2958 | this information, so just ignore it for now. (FIXME?) */ | |
2959 | break; | |
2960 | case TAG_class_type: | |
2961 | case TAG_structure_type: | |
2962 | case TAG_union_type: | |
2963 | case TAG_enumeration_type: | |
2964 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
176620f1 | 2965 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c SS |
2966 | add_symbol_to_list (sym, list_in_scope); |
2967 | break; | |
2968 | case TAG_typedef: | |
2969 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
176620f1 | 2970 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
c906108c SS |
2971 | add_symbol_to_list (sym, list_in_scope); |
2972 | break; | |
2973 | default: | |
2974 | /* Not a tag we recognize. Hopefully we aren't processing trash | |
2975 | data, but since we must specifically ignore things we don't | |
2976 | recognize, there is nothing else we should do at this point. */ | |
2977 | break; | |
2978 | } | |
2979 | } | |
2980 | return (sym); | |
2981 | } | |
2982 | ||
2983 | /* | |
2984 | ||
c5aa993b | 2985 | LOCAL FUNCTION |
c906108c | 2986 | |
c5aa993b | 2987 | synthesize_typedef -- make a symbol table entry for a "fake" typedef |
c906108c | 2988 | |
c5aa993b | 2989 | SYNOPSIS |
c906108c | 2990 | |
c5aa993b JM |
2991 | static void synthesize_typedef (struct dieinfo *dip, |
2992 | struct objfile *objfile, | |
2993 | struct type *type); | |
c906108c | 2994 | |
c5aa993b | 2995 | DESCRIPTION |
c906108c | 2996 | |
c5aa993b JM |
2997 | Given a pointer to a DWARF information entry, synthesize a typedef |
2998 | for the name in the DIE, using the specified type. | |
c906108c | 2999 | |
c5aa993b JM |
3000 | This is used for C++ class, structs, unions, and enumerations to |
3001 | set up the tag name as a type. | |
c906108c SS |
3002 | |
3003 | */ | |
3004 | ||
3005 | static void | |
fba45db2 KB |
3006 | synthesize_typedef (struct dieinfo *dip, struct objfile *objfile, |
3007 | struct type *type) | |
c906108c SS |
3008 | { |
3009 | struct symbol *sym = NULL; | |
c5aa993b JM |
3010 | |
3011 | if (dip->at_name != NULL) | |
c906108c SS |
3012 | { |
3013 | sym = (struct symbol *) | |
c5aa993b | 3014 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); |
c906108c SS |
3015 | OBJSTAT (objfile, n_syms++); |
3016 | memset (sym, 0, sizeof (struct symbol)); | |
22abf04a | 3017 | DEPRECATED_SYMBOL_NAME (sym) = create_name (dip->at_name, |
c906108c SS |
3018 | &objfile->symbol_obstack); |
3019 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); | |
3020 | SYMBOL_TYPE (sym) = type; | |
3021 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
176620f1 | 3022 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
c906108c SS |
3023 | add_symbol_to_list (sym, list_in_scope); |
3024 | } | |
3025 | } | |
3026 | ||
3027 | /* | |
3028 | ||
c5aa993b | 3029 | LOCAL FUNCTION |
c906108c | 3030 | |
c5aa993b | 3031 | decode_mod_fund_type -- decode a modified fundamental type |
c906108c | 3032 | |
c5aa993b | 3033 | SYNOPSIS |
c906108c | 3034 | |
c5aa993b | 3035 | static struct type *decode_mod_fund_type (char *typedata) |
c906108c | 3036 | |
c5aa993b | 3037 | DESCRIPTION |
c906108c | 3038 | |
c5aa993b JM |
3039 | Decode a block of data containing a modified fundamental |
3040 | type specification. TYPEDATA is a pointer to the block, | |
3041 | which starts with a length containing the size of the rest | |
3042 | of the block. At the end of the block is a fundmental type | |
3043 | code value that gives the fundamental type. Everything | |
3044 | in between are type modifiers. | |
c906108c | 3045 | |
c5aa993b JM |
3046 | We simply compute the number of modifiers and call the general |
3047 | function decode_modified_type to do the actual work. | |
3048 | */ | |
c906108c SS |
3049 | |
3050 | static struct type * | |
fba45db2 | 3051 | decode_mod_fund_type (char *typedata) |
c906108c SS |
3052 | { |
3053 | struct type *typep = NULL; | |
3054 | unsigned short modcount; | |
3055 | int nbytes; | |
c5aa993b | 3056 | |
c906108c SS |
3057 | /* Get the total size of the block, exclusive of the size itself */ |
3058 | ||
3059 | nbytes = attribute_size (AT_mod_fund_type); | |
3060 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3061 | typedata += nbytes; | |
3062 | ||
3063 | /* Deduct the size of the fundamental type bytes at the end of the block. */ | |
3064 | ||
3065 | modcount -= attribute_size (AT_fund_type); | |
3066 | ||
3067 | /* Now do the actual decoding */ | |
3068 | ||
3069 | typep = decode_modified_type (typedata, modcount, AT_mod_fund_type); | |
3070 | return (typep); | |
3071 | } | |
3072 | ||
3073 | /* | |
3074 | ||
c5aa993b | 3075 | LOCAL FUNCTION |
c906108c | 3076 | |
c5aa993b | 3077 | decode_mod_u_d_type -- decode a modified user defined type |
c906108c | 3078 | |
c5aa993b | 3079 | SYNOPSIS |
c906108c | 3080 | |
c5aa993b | 3081 | static struct type *decode_mod_u_d_type (char *typedata) |
c906108c | 3082 | |
c5aa993b | 3083 | DESCRIPTION |
c906108c | 3084 | |
c5aa993b JM |
3085 | Decode a block of data containing a modified user defined |
3086 | type specification. TYPEDATA is a pointer to the block, | |
3087 | which consists of a two byte length, containing the size | |
3088 | of the rest of the block. At the end of the block is a | |
3089 | four byte value that gives a reference to a user defined type. | |
3090 | Everything in between are type modifiers. | |
c906108c | 3091 | |
c5aa993b JM |
3092 | We simply compute the number of modifiers and call the general |
3093 | function decode_modified_type to do the actual work. | |
3094 | */ | |
c906108c SS |
3095 | |
3096 | static struct type * | |
fba45db2 | 3097 | decode_mod_u_d_type (char *typedata) |
c906108c SS |
3098 | { |
3099 | struct type *typep = NULL; | |
3100 | unsigned short modcount; | |
3101 | int nbytes; | |
c5aa993b | 3102 | |
c906108c SS |
3103 | /* Get the total size of the block, exclusive of the size itself */ |
3104 | ||
3105 | nbytes = attribute_size (AT_mod_u_d_type); | |
3106 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3107 | typedata += nbytes; | |
3108 | ||
3109 | /* Deduct the size of the reference type bytes at the end of the block. */ | |
3110 | ||
3111 | modcount -= attribute_size (AT_user_def_type); | |
3112 | ||
3113 | /* Now do the actual decoding */ | |
3114 | ||
3115 | typep = decode_modified_type (typedata, modcount, AT_mod_u_d_type); | |
3116 | return (typep); | |
3117 | } | |
3118 | ||
3119 | /* | |
3120 | ||
c5aa993b | 3121 | LOCAL FUNCTION |
c906108c | 3122 | |
c5aa993b | 3123 | decode_modified_type -- decode modified user or fundamental type |
c906108c | 3124 | |
c5aa993b | 3125 | SYNOPSIS |
c906108c | 3126 | |
c5aa993b JM |
3127 | static struct type *decode_modified_type (char *modifiers, |
3128 | unsigned short modcount, int mtype) | |
c906108c | 3129 | |
c5aa993b | 3130 | DESCRIPTION |
c906108c | 3131 | |
c5aa993b JM |
3132 | Decode a modified type, either a modified fundamental type or |
3133 | a modified user defined type. MODIFIERS is a pointer to the | |
3134 | block of bytes that define MODCOUNT modifiers. Immediately | |
3135 | following the last modifier is a short containing the fundamental | |
3136 | type or a long containing the reference to the user defined | |
3137 | type. Which one is determined by MTYPE, which is either | |
3138 | AT_mod_fund_type or AT_mod_u_d_type to indicate what modified | |
3139 | type we are generating. | |
c906108c | 3140 | |
c5aa993b JM |
3141 | We call ourself recursively to generate each modified type,` |
3142 | until MODCOUNT reaches zero, at which point we have consumed | |
3143 | all the modifiers and generate either the fundamental type or | |
3144 | user defined type. When the recursion unwinds, each modifier | |
3145 | is applied in turn to generate the full modified type. | |
3146 | ||
3147 | NOTES | |
c906108c | 3148 | |
c5aa993b JM |
3149 | If we find a modifier that we don't recognize, and it is not one |
3150 | of those reserved for application specific use, then we issue a | |
3151 | warning and simply ignore the modifier. | |
c906108c | 3152 | |
c5aa993b | 3153 | BUGS |
c906108c | 3154 | |
c5aa993b | 3155 | We currently ignore MOD_const and MOD_volatile. (FIXME) |
c906108c SS |
3156 | |
3157 | */ | |
3158 | ||
3159 | static struct type * | |
fba45db2 | 3160 | decode_modified_type (char *modifiers, unsigned int modcount, int mtype) |
c906108c SS |
3161 | { |
3162 | struct type *typep = NULL; | |
3163 | unsigned short fundtype; | |
3164 | DIE_REF die_ref; | |
3165 | char modifier; | |
3166 | int nbytes; | |
c5aa993b | 3167 | |
c906108c SS |
3168 | if (modcount == 0) |
3169 | { | |
3170 | switch (mtype) | |
3171 | { | |
3172 | case AT_mod_fund_type: | |
3173 | nbytes = attribute_size (AT_fund_type); | |
3174 | fundtype = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3175 | current_objfile); | |
3176 | typep = decode_fund_type (fundtype); | |
3177 | break; | |
3178 | case AT_mod_u_d_type: | |
3179 | nbytes = attribute_size (AT_user_def_type); | |
3180 | die_ref = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3181 | current_objfile); | |
b59661bd AC |
3182 | typep = lookup_utype (die_ref); |
3183 | if (typep == NULL) | |
c906108c SS |
3184 | { |
3185 | typep = alloc_utype (die_ref, NULL); | |
3186 | } | |
3187 | break; | |
3188 | default: | |
23136709 KB |
3189 | complaint (&symfile_complaints, |
3190 | "DIE @ 0x%x \"%s\", botched modified type decoding (mtype 0x%x)", | |
3191 | DIE_ID, DIE_NAME, mtype); | |
c906108c SS |
3192 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
3193 | break; | |
3194 | } | |
3195 | } | |
3196 | else | |
3197 | { | |
3198 | modifier = *modifiers++; | |
3199 | typep = decode_modified_type (modifiers, --modcount, mtype); | |
3200 | switch (modifier) | |
3201 | { | |
c5aa993b JM |
3202 | case MOD_pointer_to: |
3203 | typep = lookup_pointer_type (typep); | |
3204 | break; | |
3205 | case MOD_reference_to: | |
3206 | typep = lookup_reference_type (typep); | |
3207 | break; | |
3208 | case MOD_const: | |
23136709 KB |
3209 | complaint (&symfile_complaints, |
3210 | "DIE @ 0x%x \"%s\", type modifier 'const' ignored", DIE_ID, | |
3211 | DIE_NAME); /* FIXME */ | |
c5aa993b JM |
3212 | break; |
3213 | case MOD_volatile: | |
23136709 KB |
3214 | complaint (&symfile_complaints, |
3215 | "DIE @ 0x%x \"%s\", type modifier 'volatile' ignored", | |
3216 | DIE_ID, DIE_NAME); /* FIXME */ | |
c5aa993b JM |
3217 | break; |
3218 | default: | |
3cb3398d EZ |
3219 | if (!(MOD_lo_user <= (unsigned char) modifier)) |
3220 | #if 0 | |
3221 | /* This part of the test would always be true, and it triggers a compiler | |
3222 | warning. */ | |
c5aa993b | 3223 | && (unsigned char) modifier <= MOD_hi_user)) |
3cb3398d | 3224 | #endif |
c5aa993b | 3225 | { |
23136709 KB |
3226 | complaint (&symfile_complaints, |
3227 | "DIE @ 0x%x \"%s\", unknown type modifier %u", DIE_ID, | |
3228 | DIE_NAME, modifier); | |
c5aa993b JM |
3229 | } |
3230 | break; | |
c906108c SS |
3231 | } |
3232 | } | |
3233 | return (typep); | |
3234 | } | |
3235 | ||
3236 | /* | |
3237 | ||
c5aa993b | 3238 | LOCAL FUNCTION |
c906108c | 3239 | |
c5aa993b | 3240 | decode_fund_type -- translate basic DWARF type to gdb base type |
c906108c | 3241 | |
c5aa993b | 3242 | DESCRIPTION |
c906108c | 3243 | |
c5aa993b JM |
3244 | Given an integer that is one of the fundamental DWARF types, |
3245 | translate it to one of the basic internal gdb types and return | |
3246 | a pointer to the appropriate gdb type (a "struct type *"). | |
c906108c | 3247 | |
c5aa993b | 3248 | NOTES |
c906108c | 3249 | |
c5aa993b JM |
3250 | For robustness, if we are asked to translate a fundamental |
3251 | type that we are unprepared to deal with, we return int so | |
3252 | callers can always depend upon a valid type being returned, | |
3253 | and so gdb may at least do something reasonable by default. | |
3254 | If the type is not in the range of those types defined as | |
3255 | application specific types, we also issue a warning. | |
3256 | */ | |
c906108c SS |
3257 | |
3258 | static struct type * | |
fba45db2 | 3259 | decode_fund_type (unsigned int fundtype) |
c906108c SS |
3260 | { |
3261 | struct type *typep = NULL; | |
c5aa993b | 3262 | |
c906108c SS |
3263 | switch (fundtype) |
3264 | { | |
3265 | ||
3266 | case FT_void: | |
3267 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); | |
3268 | break; | |
c5aa993b | 3269 | |
c906108c SS |
3270 | case FT_boolean: /* Was FT_set in AT&T version */ |
3271 | typep = dwarf_fundamental_type (current_objfile, FT_BOOLEAN); | |
3272 | break; | |
3273 | ||
3274 | case FT_pointer: /* (void *) */ | |
3275 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); | |
3276 | typep = lookup_pointer_type (typep); | |
3277 | break; | |
c5aa993b | 3278 | |
c906108c SS |
3279 | case FT_char: |
3280 | typep = dwarf_fundamental_type (current_objfile, FT_CHAR); | |
3281 | break; | |
c5aa993b | 3282 | |
c906108c SS |
3283 | case FT_signed_char: |
3284 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_CHAR); | |
3285 | break; | |
3286 | ||
3287 | case FT_unsigned_char: | |
3288 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); | |
3289 | break; | |
c5aa993b | 3290 | |
c906108c SS |
3291 | case FT_short: |
3292 | typep = dwarf_fundamental_type (current_objfile, FT_SHORT); | |
3293 | break; | |
3294 | ||
3295 | case FT_signed_short: | |
3296 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_SHORT); | |
3297 | break; | |
c5aa993b | 3298 | |
c906108c SS |
3299 | case FT_unsigned_short: |
3300 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); | |
3301 | break; | |
c5aa993b | 3302 | |
c906108c SS |
3303 | case FT_integer: |
3304 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
3305 | break; | |
3306 | ||
3307 | case FT_signed_integer: | |
3308 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_INTEGER); | |
3309 | break; | |
c5aa993b | 3310 | |
c906108c SS |
3311 | case FT_unsigned_integer: |
3312 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); | |
3313 | break; | |
c5aa993b | 3314 | |
c906108c SS |
3315 | case FT_long: |
3316 | typep = dwarf_fundamental_type (current_objfile, FT_LONG); | |
3317 | break; | |
3318 | ||
3319 | case FT_signed_long: | |
3320 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG); | |
3321 | break; | |
c5aa993b | 3322 | |
c906108c SS |
3323 | case FT_unsigned_long: |
3324 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG); | |
3325 | break; | |
c5aa993b | 3326 | |
c906108c SS |
3327 | case FT_long_long: |
3328 | typep = dwarf_fundamental_type (current_objfile, FT_LONG_LONG); | |
3329 | break; | |
3330 | ||
3331 | case FT_signed_long_long: | |
3332 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG_LONG); | |
3333 | break; | |
3334 | ||
3335 | case FT_unsigned_long_long: | |
3336 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); | |
3337 | break; | |
3338 | ||
3339 | case FT_float: | |
3340 | typep = dwarf_fundamental_type (current_objfile, FT_FLOAT); | |
3341 | break; | |
c5aa993b | 3342 | |
c906108c SS |
3343 | case FT_dbl_prec_float: |
3344 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); | |
3345 | break; | |
c5aa993b | 3346 | |
c906108c SS |
3347 | case FT_ext_prec_float: |
3348 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); | |
3349 | break; | |
c5aa993b | 3350 | |
c906108c SS |
3351 | case FT_complex: |
3352 | typep = dwarf_fundamental_type (current_objfile, FT_COMPLEX); | |
3353 | break; | |
c5aa993b | 3354 | |
c906108c SS |
3355 | case FT_dbl_prec_complex: |
3356 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_COMPLEX); | |
3357 | break; | |
c5aa993b | 3358 | |
c906108c SS |
3359 | case FT_ext_prec_complex: |
3360 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_COMPLEX); | |
3361 | break; | |
c5aa993b | 3362 | |
c906108c SS |
3363 | } |
3364 | ||
3365 | if (typep == NULL) | |
3366 | { | |
3367 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
3368 | if (!(FT_lo_user <= fundtype && fundtype <= FT_hi_user)) | |
3369 | { | |
23136709 KB |
3370 | complaint (&symfile_complaints, |
3371 | "DIE @ 0x%x \"%s\", unexpected fundamental type 0x%x", | |
3372 | DIE_ID, DIE_NAME, fundtype); | |
c906108c SS |
3373 | } |
3374 | } | |
c5aa993b | 3375 | |
c906108c SS |
3376 | return (typep); |
3377 | } | |
3378 | ||
3379 | /* | |
3380 | ||
c5aa993b | 3381 | LOCAL FUNCTION |
c906108c | 3382 | |
c5aa993b | 3383 | create_name -- allocate a fresh copy of a string on an obstack |
c906108c | 3384 | |
c5aa993b | 3385 | DESCRIPTION |
c906108c | 3386 | |
c5aa993b JM |
3387 | Given a pointer to a string and a pointer to an obstack, allocates |
3388 | a fresh copy of the string on the specified obstack. | |
c906108c | 3389 | |
c5aa993b | 3390 | */ |
c906108c SS |
3391 | |
3392 | static char * | |
fba45db2 | 3393 | create_name (char *name, struct obstack *obstackp) |
c906108c SS |
3394 | { |
3395 | int length; | |
3396 | char *newname; | |
3397 | ||
3398 | length = strlen (name) + 1; | |
3399 | newname = (char *) obstack_alloc (obstackp, length); | |
3400 | strcpy (newname, name); | |
3401 | return (newname); | |
3402 | } | |
3403 | ||
3404 | /* | |
3405 | ||
c5aa993b | 3406 | LOCAL FUNCTION |
c906108c | 3407 | |
c5aa993b | 3408 | basicdieinfo -- extract the minimal die info from raw die data |
c906108c | 3409 | |
c5aa993b | 3410 | SYNOPSIS |
c906108c | 3411 | |
c5aa993b JM |
3412 | void basicdieinfo (char *diep, struct dieinfo *dip, |
3413 | struct objfile *objfile) | |
c906108c | 3414 | |
c5aa993b | 3415 | DESCRIPTION |
c906108c | 3416 | |
c5aa993b JM |
3417 | Given a pointer to raw DIE data, and a pointer to an instance of a |
3418 | die info structure, this function extracts the basic information | |
3419 | from the DIE data required to continue processing this DIE, along | |
3420 | with some bookkeeping information about the DIE. | |
c906108c | 3421 | |
c5aa993b JM |
3422 | The information we absolutely must have includes the DIE tag, |
3423 | and the DIE length. If we need the sibling reference, then we | |
3424 | will have to call completedieinfo() to process all the remaining | |
3425 | DIE information. | |
c906108c | 3426 | |
c5aa993b JM |
3427 | Note that since there is no guarantee that the data is properly |
3428 | aligned in memory for the type of access required (indirection | |
3429 | through anything other than a char pointer), and there is no | |
3430 | guarantee that it is in the same byte order as the gdb host, | |
3431 | we call a function which deals with both alignment and byte | |
3432 | swapping issues. Possibly inefficient, but quite portable. | |
c906108c | 3433 | |
c5aa993b JM |
3434 | We also take care of some other basic things at this point, such |
3435 | as ensuring that the instance of the die info structure starts | |
3436 | out completely zero'd and that curdie is initialized for use | |
3437 | in error reporting if we have a problem with the current die. | |
c906108c | 3438 | |
c5aa993b JM |
3439 | NOTES |
3440 | ||
3441 | All DIE's must have at least a valid length, thus the minimum | |
3442 | DIE size is SIZEOF_DIE_LENGTH. In order to have a valid tag, the | |
3443 | DIE size must be at least SIZEOF_DIE_TAG larger, otherwise they | |
3444 | are forced to be TAG_padding DIES. | |
c906108c | 3445 | |
c5aa993b JM |
3446 | Padding DIES must be at least SIZEOF_DIE_LENGTH in length, implying |
3447 | that if a padding DIE is used for alignment and the amount needed is | |
3448 | less than SIZEOF_DIE_LENGTH, then the padding DIE has to be big | |
3449 | enough to align to the next alignment boundry. | |
3450 | ||
3451 | We do some basic sanity checking here, such as verifying that the | |
3452 | length of the die would not cause it to overrun the recorded end of | |
3453 | the buffer holding the DIE info. If we find a DIE that is either | |
3454 | too small or too large, we force it's length to zero which should | |
3455 | cause the caller to take appropriate action. | |
c906108c SS |
3456 | */ |
3457 | ||
3458 | static void | |
fba45db2 | 3459 | basicdieinfo (struct dieinfo *dip, char *diep, struct objfile *objfile) |
c906108c SS |
3460 | { |
3461 | curdie = dip; | |
3462 | memset (dip, 0, sizeof (struct dieinfo)); | |
c5aa993b JM |
3463 | dip->die = diep; |
3464 | dip->die_ref = dbroff + (diep - dbbase); | |
3465 | dip->die_length = target_to_host (diep, SIZEOF_DIE_LENGTH, GET_UNSIGNED, | |
3466 | objfile); | |
3467 | if ((dip->die_length < SIZEOF_DIE_LENGTH) || | |
3468 | ((diep + dip->die_length) > (dbbase + dbsize))) | |
c906108c | 3469 | { |
23136709 KB |
3470 | complaint (&symfile_complaints, |
3471 | "DIE @ 0x%x \"%s\", malformed DIE, bad length (%ld bytes)", | |
3472 | DIE_ID, DIE_NAME, dip->die_length); | |
c5aa993b | 3473 | dip->die_length = 0; |
c906108c | 3474 | } |
c5aa993b | 3475 | else if (dip->die_length < (SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG)) |
c906108c | 3476 | { |
c5aa993b | 3477 | dip->die_tag = TAG_padding; |
c906108c SS |
3478 | } |
3479 | else | |
3480 | { | |
3481 | diep += SIZEOF_DIE_LENGTH; | |
c5aa993b JM |
3482 | dip->die_tag = target_to_host (diep, SIZEOF_DIE_TAG, GET_UNSIGNED, |
3483 | objfile); | |
c906108c SS |
3484 | } |
3485 | } | |
3486 | ||
3487 | /* | |
3488 | ||
c5aa993b | 3489 | LOCAL FUNCTION |
c906108c | 3490 | |
c5aa993b | 3491 | completedieinfo -- finish reading the information for a given DIE |
c906108c | 3492 | |
c5aa993b | 3493 | SYNOPSIS |
c906108c | 3494 | |
c5aa993b | 3495 | void completedieinfo (struct dieinfo *dip, struct objfile *objfile) |
c906108c | 3496 | |
c5aa993b | 3497 | DESCRIPTION |
c906108c | 3498 | |
c5aa993b JM |
3499 | Given a pointer to an already partially initialized die info structure, |
3500 | scan the raw DIE data and finish filling in the die info structure | |
3501 | from the various attributes found. | |
c906108c | 3502 | |
c5aa993b JM |
3503 | Note that since there is no guarantee that the data is properly |
3504 | aligned in memory for the type of access required (indirection | |
3505 | through anything other than a char pointer), and there is no | |
3506 | guarantee that it is in the same byte order as the gdb host, | |
3507 | we call a function which deals with both alignment and byte | |
3508 | swapping issues. Possibly inefficient, but quite portable. | |
c906108c | 3509 | |
c5aa993b JM |
3510 | NOTES |
3511 | ||
3512 | Each time we are called, we increment the diecount variable, which | |
3513 | keeps an approximate count of the number of dies processed for | |
3514 | each compilation unit. This information is presented to the user | |
3515 | if the info_verbose flag is set. | |
c906108c SS |
3516 | |
3517 | */ | |
3518 | ||
3519 | static void | |
fba45db2 | 3520 | completedieinfo (struct dieinfo *dip, struct objfile *objfile) |
c906108c SS |
3521 | { |
3522 | char *diep; /* Current pointer into raw DIE data */ | |
3523 | char *end; /* Terminate DIE scan here */ | |
3524 | unsigned short attr; /* Current attribute being scanned */ | |
3525 | unsigned short form; /* Form of the attribute */ | |
3526 | int nbytes; /* Size of next field to read */ | |
c5aa993b | 3527 | |
c906108c | 3528 | diecount++; |
c5aa993b JM |
3529 | diep = dip->die; |
3530 | end = diep + dip->die_length; | |
c906108c SS |
3531 | diep += SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG; |
3532 | while (diep < end) | |
3533 | { | |
3534 | attr = target_to_host (diep, SIZEOF_ATTRIBUTE, GET_UNSIGNED, objfile); | |
3535 | diep += SIZEOF_ATTRIBUTE; | |
b59661bd AC |
3536 | nbytes = attribute_size (attr); |
3537 | if (nbytes == -1) | |
c906108c | 3538 | { |
23136709 KB |
3539 | complaint (&symfile_complaints, |
3540 | "DIE @ 0x%x \"%s\", unknown attribute length, skipped remaining attributes", | |
3541 | DIE_ID, DIE_NAME); | |
c906108c SS |
3542 | diep = end; |
3543 | continue; | |
3544 | } | |
3545 | switch (attr) | |
3546 | { | |
3547 | case AT_fund_type: | |
c5aa993b JM |
3548 | dip->at_fund_type = target_to_host (diep, nbytes, GET_UNSIGNED, |
3549 | objfile); | |
c906108c SS |
3550 | break; |
3551 | case AT_ordering: | |
c5aa993b JM |
3552 | dip->at_ordering = target_to_host (diep, nbytes, GET_UNSIGNED, |
3553 | objfile); | |
c906108c SS |
3554 | break; |
3555 | case AT_bit_offset: | |
c5aa993b JM |
3556 | dip->at_bit_offset = target_to_host (diep, nbytes, GET_UNSIGNED, |
3557 | objfile); | |
c906108c SS |
3558 | break; |
3559 | case AT_sibling: | |
c5aa993b JM |
3560 | dip->at_sibling = target_to_host (diep, nbytes, GET_UNSIGNED, |
3561 | objfile); | |
c906108c SS |
3562 | break; |
3563 | case AT_stmt_list: | |
c5aa993b JM |
3564 | dip->at_stmt_list = target_to_host (diep, nbytes, GET_UNSIGNED, |
3565 | objfile); | |
3566 | dip->has_at_stmt_list = 1; | |
c906108c SS |
3567 | break; |
3568 | case AT_low_pc: | |
c5aa993b JM |
3569 | dip->at_low_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3570 | objfile); | |
3571 | dip->at_low_pc += baseaddr; | |
3572 | dip->has_at_low_pc = 1; | |
c906108c SS |
3573 | break; |
3574 | case AT_high_pc: | |
c5aa993b JM |
3575 | dip->at_high_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3576 | objfile); | |
3577 | dip->at_high_pc += baseaddr; | |
c906108c SS |
3578 | break; |
3579 | case AT_language: | |
c5aa993b JM |
3580 | dip->at_language = target_to_host (diep, nbytes, GET_UNSIGNED, |
3581 | objfile); | |
c906108c SS |
3582 | break; |
3583 | case AT_user_def_type: | |
c5aa993b JM |
3584 | dip->at_user_def_type = target_to_host (diep, nbytes, |
3585 | GET_UNSIGNED, objfile); | |
c906108c SS |
3586 | break; |
3587 | case AT_byte_size: | |
c5aa993b JM |
3588 | dip->at_byte_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3589 | objfile); | |
3590 | dip->has_at_byte_size = 1; | |
c906108c SS |
3591 | break; |
3592 | case AT_bit_size: | |
c5aa993b JM |
3593 | dip->at_bit_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3594 | objfile); | |
c906108c SS |
3595 | break; |
3596 | case AT_member: | |
c5aa993b JM |
3597 | dip->at_member = target_to_host (diep, nbytes, GET_UNSIGNED, |
3598 | objfile); | |
c906108c SS |
3599 | break; |
3600 | case AT_discr: | |
c5aa993b JM |
3601 | dip->at_discr = target_to_host (diep, nbytes, GET_UNSIGNED, |
3602 | objfile); | |
c906108c SS |
3603 | break; |
3604 | case AT_location: | |
c5aa993b | 3605 | dip->at_location = diep; |
c906108c SS |
3606 | break; |
3607 | case AT_mod_fund_type: | |
c5aa993b | 3608 | dip->at_mod_fund_type = diep; |
c906108c SS |
3609 | break; |
3610 | case AT_subscr_data: | |
c5aa993b | 3611 | dip->at_subscr_data = diep; |
c906108c SS |
3612 | break; |
3613 | case AT_mod_u_d_type: | |
c5aa993b | 3614 | dip->at_mod_u_d_type = diep; |
c906108c SS |
3615 | break; |
3616 | case AT_element_list: | |
c5aa993b JM |
3617 | dip->at_element_list = diep; |
3618 | dip->short_element_list = 0; | |
c906108c SS |
3619 | break; |
3620 | case AT_short_element_list: | |
c5aa993b JM |
3621 | dip->at_element_list = diep; |
3622 | dip->short_element_list = 1; | |
c906108c SS |
3623 | break; |
3624 | case AT_discr_value: | |
c5aa993b | 3625 | dip->at_discr_value = diep; |
c906108c SS |
3626 | break; |
3627 | case AT_string_length: | |
c5aa993b | 3628 | dip->at_string_length = diep; |
c906108c SS |
3629 | break; |
3630 | case AT_name: | |
c5aa993b | 3631 | dip->at_name = diep; |
c906108c SS |
3632 | break; |
3633 | case AT_comp_dir: | |
3634 | /* For now, ignore any "hostname:" portion, since gdb doesn't | |
3635 | know how to deal with it. (FIXME). */ | |
c5aa993b JM |
3636 | dip->at_comp_dir = strrchr (diep, ':'); |
3637 | if (dip->at_comp_dir != NULL) | |
c906108c | 3638 | { |
c5aa993b | 3639 | dip->at_comp_dir++; |
c906108c SS |
3640 | } |
3641 | else | |
3642 | { | |
c5aa993b | 3643 | dip->at_comp_dir = diep; |
c906108c SS |
3644 | } |
3645 | break; | |
3646 | case AT_producer: | |
c5aa993b | 3647 | dip->at_producer = diep; |
c906108c SS |
3648 | break; |
3649 | case AT_start_scope: | |
c5aa993b JM |
3650 | dip->at_start_scope = target_to_host (diep, nbytes, GET_UNSIGNED, |
3651 | objfile); | |
c906108c SS |
3652 | break; |
3653 | case AT_stride_size: | |
c5aa993b JM |
3654 | dip->at_stride_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3655 | objfile); | |
c906108c SS |
3656 | break; |
3657 | case AT_src_info: | |
c5aa993b JM |
3658 | dip->at_src_info = target_to_host (diep, nbytes, GET_UNSIGNED, |
3659 | objfile); | |
c906108c SS |
3660 | break; |
3661 | case AT_prototyped: | |
c5aa993b | 3662 | dip->at_prototyped = diep; |
c906108c SS |
3663 | break; |
3664 | default: | |
3665 | /* Found an attribute that we are unprepared to handle. However | |
3666 | it is specifically one of the design goals of DWARF that | |
3667 | consumers should ignore unknown attributes. As long as the | |
3668 | form is one that we recognize (so we know how to skip it), | |
3669 | we can just ignore the unknown attribute. */ | |
3670 | break; | |
3671 | } | |
3672 | form = FORM_FROM_ATTR (attr); | |
3673 | switch (form) | |
3674 | { | |
3675 | case FORM_DATA2: | |
3676 | diep += 2; | |
3677 | break; | |
3678 | case FORM_DATA4: | |
3679 | case FORM_REF: | |
3680 | diep += 4; | |
3681 | break; | |
3682 | case FORM_DATA8: | |
3683 | diep += 8; | |
3684 | break; | |
3685 | case FORM_ADDR: | |
3686 | diep += TARGET_FT_POINTER_SIZE (objfile); | |
3687 | break; | |
3688 | case FORM_BLOCK2: | |
3689 | diep += 2 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); | |
3690 | break; | |
3691 | case FORM_BLOCK4: | |
3692 | diep += 4 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); | |
3693 | break; | |
3694 | case FORM_STRING: | |
3695 | diep += strlen (diep) + 1; | |
3696 | break; | |
3697 | default: | |
23136709 | 3698 | unknown_attribute_form_complaint (DIE_ID, DIE_NAME, form); |
c906108c SS |
3699 | diep = end; |
3700 | break; | |
3701 | } | |
3702 | } | |
3703 | } | |
3704 | ||
3705 | /* | |
3706 | ||
c5aa993b | 3707 | LOCAL FUNCTION |
c906108c | 3708 | |
c5aa993b | 3709 | target_to_host -- swap in target data to host |
c906108c | 3710 | |
c5aa993b | 3711 | SYNOPSIS |
c906108c | 3712 | |
c5aa993b JM |
3713 | target_to_host (char *from, int nbytes, int signextend, |
3714 | struct objfile *objfile) | |
c906108c | 3715 | |
c5aa993b | 3716 | DESCRIPTION |
c906108c | 3717 | |
c5aa993b JM |
3718 | Given pointer to data in target format in FROM, a byte count for |
3719 | the size of the data in NBYTES, a flag indicating whether or not | |
3720 | the data is signed in SIGNEXTEND, and a pointer to the current | |
3721 | objfile in OBJFILE, convert the data to host format and return | |
3722 | the converted value. | |
c906108c | 3723 | |
c5aa993b | 3724 | NOTES |
c906108c | 3725 | |
c5aa993b JM |
3726 | FIXME: If we read data that is known to be signed, and expect to |
3727 | use it as signed data, then we need to explicitly sign extend the | |
3728 | result until the bfd library is able to do this for us. | |
c906108c | 3729 | |
c5aa993b | 3730 | FIXME: Would a 32 bit target ever need an 8 byte result? |
c906108c SS |
3731 | |
3732 | */ | |
3733 | ||
3734 | static CORE_ADDR | |
fba45db2 KB |
3735 | target_to_host (char *from, int nbytes, int signextend, /* FIXME: Unused */ |
3736 | struct objfile *objfile) | |
c906108c SS |
3737 | { |
3738 | CORE_ADDR rtnval; | |
3739 | ||
3740 | switch (nbytes) | |
3741 | { | |
c5aa993b JM |
3742 | case 8: |
3743 | rtnval = bfd_get_64 (objfile->obfd, (bfd_byte *) from); | |
3744 | break; | |
3745 | case 4: | |
3746 | rtnval = bfd_get_32 (objfile->obfd, (bfd_byte *) from); | |
3747 | break; | |
3748 | case 2: | |
3749 | rtnval = bfd_get_16 (objfile->obfd, (bfd_byte *) from); | |
3750 | break; | |
3751 | case 1: | |
3752 | rtnval = bfd_get_8 (objfile->obfd, (bfd_byte *) from); | |
3753 | break; | |
3754 | default: | |
23136709 KB |
3755 | complaint (&symfile_complaints, |
3756 | "DIE @ 0x%x \"%s\", no bfd support for %d byte data object", | |
3757 | DIE_ID, DIE_NAME, nbytes); | |
c5aa993b JM |
3758 | rtnval = 0; |
3759 | break; | |
c906108c SS |
3760 | } |
3761 | return (rtnval); | |
3762 | } | |
3763 | ||
3764 | /* | |
3765 | ||
c5aa993b | 3766 | LOCAL FUNCTION |
c906108c | 3767 | |
c5aa993b | 3768 | attribute_size -- compute size of data for a DWARF attribute |
c906108c | 3769 | |
c5aa993b | 3770 | SYNOPSIS |
c906108c | 3771 | |
c5aa993b | 3772 | static int attribute_size (unsigned int attr) |
c906108c | 3773 | |
c5aa993b | 3774 | DESCRIPTION |
c906108c | 3775 | |
c5aa993b JM |
3776 | Given a DWARF attribute in ATTR, compute the size of the first |
3777 | piece of data associated with this attribute and return that | |
3778 | size. | |
c906108c | 3779 | |
c5aa993b | 3780 | Returns -1 for unrecognized attributes. |
c906108c SS |
3781 | |
3782 | */ | |
3783 | ||
3784 | static int | |
fba45db2 | 3785 | attribute_size (unsigned int attr) |
c906108c SS |
3786 | { |
3787 | int nbytes; /* Size of next data for this attribute */ | |
3788 | unsigned short form; /* Form of the attribute */ | |
3789 | ||
3790 | form = FORM_FROM_ATTR (attr); | |
3791 | switch (form) | |
3792 | { | |
c5aa993b JM |
3793 | case FORM_STRING: /* A variable length field is next */ |
3794 | nbytes = 0; | |
3795 | break; | |
3796 | case FORM_DATA2: /* Next 2 byte field is the data itself */ | |
3797 | case FORM_BLOCK2: /* Next 2 byte field is a block length */ | |
3798 | nbytes = 2; | |
3799 | break; | |
3800 | case FORM_DATA4: /* Next 4 byte field is the data itself */ | |
3801 | case FORM_BLOCK4: /* Next 4 byte field is a block length */ | |
3802 | case FORM_REF: /* Next 4 byte field is a DIE offset */ | |
3803 | nbytes = 4; | |
3804 | break; | |
3805 | case FORM_DATA8: /* Next 8 byte field is the data itself */ | |
3806 | nbytes = 8; | |
3807 | break; | |
3808 | case FORM_ADDR: /* Next field size is target sizeof(void *) */ | |
3809 | nbytes = TARGET_FT_POINTER_SIZE (objfile); | |
3810 | break; | |
3811 | default: | |
23136709 | 3812 | unknown_attribute_form_complaint (DIE_ID, DIE_NAME, form); |
c5aa993b JM |
3813 | nbytes = -1; |
3814 | break; | |
3815 | } | |
c906108c SS |
3816 | return (nbytes); |
3817 | } |