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. | |
27 | Go look in dwarf2read.c. This file is for the original DWARF. | |
28 | ||
29 | DWARF (also known as DWARF-1) is headed for obsoletion. | |
30 | ||
31 | In gcc 3.2.1, these targets prefer dwarf-1: | |
32 | ||
33 | i[34567]86-sequent-ptx4* # TD-R2 | |
34 | i[34567]86-sequent-sysv4* # TD-R2 | |
35 | i[34567]86-dg-dgux* # obsolete in gcc 3.2.1, to be removed in 3.3 | |
36 | m88k-dg-dgux* # TD-R2 | |
37 | mips-sni-sysv4 # TD-R2 | |
38 | sparc-hal-solaris2* # TD-R2 | |
39 | ||
40 | Configurations marked with "# TD-R2" are on Zach Weinberg's list | |
41 | of "Target Deprecation, Round 2". This is a candidate list of | |
42 | targets to be deprecated in gcc 3.3 and removed in gcc 3.4. | |
43 | ||
44 | http://gcc.gnu.org/ml/gcc/2002-12/msg00702.html | |
45 | ||
46 | gcc 2.95.3 had many configurations which prefer dwarf-1. | |
47 | We may have to support dwarf-1 as long as we support gcc 2.95.3. | |
48 | This could use more analysis. | |
49 | ||
50 | DG/UX (Data General Unix) used dwarf-1 for its native format. | |
51 | DG/UX uses gcc for its system C compiler, but they have their | |
52 | own linker and their own debuggers. | |
53 | ||
54 | Takis Psarogiannakopoulos has a complete gnu toolchain for DG/UX | |
55 | with gcc 2.95.3, gdb 5.1, and debug formats of dwarf-2 and stabs. | |
56 | For more info, see PR gdb/979 and PR gdb/1013; also: | |
57 | ||
58 | http://sources.redhat.com/ml/gdb/2003-02/msg00074.html | |
59 | ||
60 | There may be non-gcc compilers that still emit dwarf-1. | |
61 | ||
62 | -- chastain 2003-02-04 | |
63 | */ | |
64 | ||
c906108c SS |
65 | /* |
66 | ||
c5aa993b JM |
67 | FIXME: Do we need to generate dependencies in partial symtabs? |
68 | (Perhaps we don't need to). | |
c906108c | 69 | |
c5aa993b JM |
70 | FIXME: Resolve minor differences between what information we put in the |
71 | partial symbol table and what dbxread puts in. For example, we don't yet | |
72 | put enum constants there. And dbxread seems to invent a lot of typedefs | |
73 | we never see. Use the new printpsym command to see the partial symbol table | |
74 | contents. | |
c906108c | 75 | |
c5aa993b JM |
76 | FIXME: Figure out a better way to tell gdb about the name of the function |
77 | contain the user's entry point (I.E. main()) | |
c906108c | 78 | |
c5aa993b JM |
79 | FIXME: See other FIXME's and "ifdef 0" scattered throughout the code for |
80 | other things to work on, if you get bored. :-) | |
c906108c | 81 | |
c5aa993b | 82 | */ |
c906108c SS |
83 | |
84 | #include "defs.h" | |
85 | #include "symtab.h" | |
86 | #include "gdbtypes.h" | |
87 | #include "symfile.h" | |
88 | #include "objfiles.h" | |
89 | #include "elf/dwarf.h" | |
90 | #include "buildsym.h" | |
91 | #include "demangle.h" | |
c5aa993b | 92 | #include "expression.h" /* Needed for enum exp_opcode in language.h, sigh... */ |
c906108c SS |
93 | #include "language.h" |
94 | #include "complaints.h" | |
95 | ||
96 | #include <fcntl.h> | |
97 | #include "gdb_string.h" | |
98 | ||
99 | /* Some macros to provide DIE info for complaints. */ | |
100 | ||
101 | #define DIE_ID (curdie!=NULL ? curdie->die_ref : 0) | |
102 | #define DIE_NAME (curdie!=NULL && curdie->at_name!=NULL) ? curdie->at_name : "" | |
103 | ||
104 | /* Complaints that can be issued during DWARF debug info reading. */ | |
105 | ||
23136709 KB |
106 | static void |
107 | bad_die_ref_complaint (int arg1, const char *arg2, int arg3) | |
c906108c | 108 | { |
23136709 KB |
109 | complaint (&symfile_complaints, |
110 | "DIE @ 0x%x \"%s\", reference to DIE (0x%x) outside compilation unit", | |
111 | arg1, arg2, arg3); | |
112 | } | |
c906108c | 113 | |
23136709 KB |
114 | static void |
115 | unknown_attribute_form_complaint (int arg1, const char *arg2, int arg3) | |
c906108c | 116 | { |
23136709 KB |
117 | complaint (&symfile_complaints, |
118 | "DIE @ 0x%x \"%s\", unknown attribute form (0x%x)", arg1, arg2, | |
119 | arg3); | |
120 | } | |
c906108c | 121 | |
23136709 KB |
122 | static void |
123 | dup_user_type_definition_complaint (int arg1, const char *arg2) | |
c906108c | 124 | { |
23136709 KB |
125 | complaint (&symfile_complaints, |
126 | "DIE @ 0x%x \"%s\", internal error: duplicate user type definition", | |
127 | arg1, arg2); | |
128 | } | |
c906108c | 129 | |
23136709 KB |
130 | static void |
131 | bad_array_element_type_complaint (int arg1, const char *arg2, int arg3) | |
c906108c | 132 | { |
23136709 KB |
133 | complaint (&symfile_complaints, |
134 | "DIE @ 0x%x \"%s\", bad array element type attribute 0x%x", arg1, | |
135 | arg2, arg3); | |
136 | } | |
c906108c SS |
137 | |
138 | typedef unsigned int DIE_REF; /* Reference to a DIE */ | |
139 | ||
140 | #ifndef GCC_PRODUCER | |
141 | #define GCC_PRODUCER "GNU C " | |
142 | #endif | |
143 | ||
144 | #ifndef GPLUS_PRODUCER | |
145 | #define GPLUS_PRODUCER "GNU C++ " | |
146 | #endif | |
147 | ||
148 | #ifndef LCC_PRODUCER | |
149 | #define LCC_PRODUCER "NCR C/C++" | |
150 | #endif | |
151 | ||
c906108c SS |
152 | /* Flags to target_to_host() that tell whether or not the data object is |
153 | expected to be signed. Used, for example, when fetching a signed | |
154 | integer in the target environment which is used as a signed integer | |
155 | in the host environment, and the two environments have different sized | |
156 | ints. In this case, *somebody* has to sign extend the smaller sized | |
157 | int. */ | |
158 | ||
159 | #define GET_UNSIGNED 0 /* No sign extension required */ | |
160 | #define GET_SIGNED 1 /* Sign extension required */ | |
161 | ||
162 | /* Defines for things which are specified in the document "DWARF Debugging | |
163 | Information Format" published by UNIX International, Programming Languages | |
164 | SIG. These defines are based on revision 1.0.0, Jan 20, 1992. */ | |
165 | ||
166 | #define SIZEOF_DIE_LENGTH 4 | |
167 | #define SIZEOF_DIE_TAG 2 | |
168 | #define SIZEOF_ATTRIBUTE 2 | |
169 | #define SIZEOF_FORMAT_SPECIFIER 1 | |
170 | #define SIZEOF_FMT_FT 2 | |
171 | #define SIZEOF_LINETBL_LENGTH 4 | |
172 | #define SIZEOF_LINETBL_LINENO 4 | |
173 | #define SIZEOF_LINETBL_STMT 2 | |
174 | #define SIZEOF_LINETBL_DELTA 4 | |
175 | #define SIZEOF_LOC_ATOM_CODE 1 | |
176 | ||
177 | #define FORM_FROM_ATTR(attr) ((attr) & 0xF) /* Implicitly specified */ | |
178 | ||
179 | /* Macros that return the sizes of various types of data in the target | |
180 | environment. | |
181 | ||
182 | FIXME: Currently these are just compile time constants (as they are in | |
183 | other parts of gdb as well). They need to be able to get the right size | |
184 | either from the bfd or possibly from the DWARF info. It would be nice if | |
185 | the DWARF producer inserted DIES that describe the fundamental types in | |
186 | the target environment into the DWARF info, similar to the way dbx stabs | |
187 | producers produce information about their fundamental types. */ | |
188 | ||
189 | #define TARGET_FT_POINTER_SIZE(objfile) (TARGET_PTR_BIT / TARGET_CHAR_BIT) | |
190 | #define TARGET_FT_LONG_SIZE(objfile) (TARGET_LONG_BIT / TARGET_CHAR_BIT) | |
191 | ||
192 | /* The Amiga SVR4 header file <dwarf.h> defines AT_element_list as a | |
193 | FORM_BLOCK2, and this is the value emitted by the AT&T compiler. | |
194 | However, the Issue 2 DWARF specification from AT&T defines it as | |
195 | a FORM_BLOCK4, as does the latest specification from UI/PLSIG. | |
196 | For backwards compatibility with the AT&T compiler produced executables | |
197 | we define AT_short_element_list for this variant. */ | |
198 | ||
199 | #define AT_short_element_list (0x00f0|FORM_BLOCK2) | |
200 | ||
c906108c SS |
201 | /* The DWARF debugging information consists of two major pieces, |
202 | one is a block of DWARF Information Entries (DIE's) and the other | |
203 | is a line number table. The "struct dieinfo" structure contains | |
204 | the information for a single DIE, the one currently being processed. | |
205 | ||
206 | In order to make it easier to randomly access the attribute fields | |
207 | of the current DIE, which are specifically unordered within the DIE, | |
208 | each DIE is scanned and an instance of the "struct dieinfo" | |
209 | structure is initialized. | |
210 | ||
211 | Initialization is done in two levels. The first, done by basicdieinfo(), | |
212 | just initializes those fields that are vital to deciding whether or not | |
213 | to use this DIE, how to skip past it, etc. The second, done by the | |
214 | function completedieinfo(), fills in the rest of the information. | |
215 | ||
216 | Attributes which have block forms are not interpreted at the time | |
217 | the DIE is scanned, instead we just save pointers to the start | |
218 | of their value fields. | |
219 | ||
220 | Some fields have a flag <name>_p that is set when the value of the | |
221 | field is valid (I.E. we found a matching attribute in the DIE). Since | |
222 | we may want to test for the presence of some attributes in the DIE, | |
223 | such as AT_low_pc, without restricting the values of the field, | |
224 | we need someway to note that we found such an attribute. | |
c5aa993b | 225 | |
c906108c | 226 | */ |
c5aa993b | 227 | |
c906108c SS |
228 | typedef char BLOCK; |
229 | ||
c5aa993b JM |
230 | struct dieinfo |
231 | { | |
232 | char *die; /* Pointer to the raw DIE data */ | |
233 | unsigned long die_length; /* Length of the raw DIE data */ | |
234 | DIE_REF die_ref; /* Offset of this DIE */ | |
235 | unsigned short die_tag; /* Tag for this DIE */ | |
236 | unsigned long at_padding; | |
237 | unsigned long at_sibling; | |
238 | BLOCK *at_location; | |
239 | char *at_name; | |
240 | unsigned short at_fund_type; | |
241 | BLOCK *at_mod_fund_type; | |
242 | unsigned long at_user_def_type; | |
243 | BLOCK *at_mod_u_d_type; | |
244 | unsigned short at_ordering; | |
245 | BLOCK *at_subscr_data; | |
246 | unsigned long at_byte_size; | |
247 | unsigned short at_bit_offset; | |
248 | unsigned long at_bit_size; | |
249 | BLOCK *at_element_list; | |
250 | unsigned long at_stmt_list; | |
251 | CORE_ADDR at_low_pc; | |
252 | CORE_ADDR at_high_pc; | |
253 | unsigned long at_language; | |
254 | unsigned long at_member; | |
255 | unsigned long at_discr; | |
256 | BLOCK *at_discr_value; | |
257 | BLOCK *at_string_length; | |
258 | char *at_comp_dir; | |
259 | char *at_producer; | |
260 | unsigned long at_start_scope; | |
261 | unsigned long at_stride_size; | |
262 | unsigned long at_src_info; | |
263 | char *at_prototyped; | |
264 | unsigned int has_at_low_pc:1; | |
265 | unsigned int has_at_stmt_list:1; | |
266 | unsigned int has_at_byte_size:1; | |
267 | unsigned int short_element_list:1; | |
268 | ||
269 | /* Kludge to identify register variables */ | |
270 | ||
271 | unsigned int isreg; | |
272 | ||
273 | /* Kludge to identify optimized out variables */ | |
274 | ||
275 | unsigned int optimized_out; | |
276 | ||
277 | /* Kludge to identify basereg references. | |
278 | Nonzero if we have an offset relative to a basereg. */ | |
279 | ||
280 | unsigned int offreg; | |
281 | ||
282 | /* Kludge to identify which base register is it relative to. */ | |
283 | ||
284 | unsigned int basereg; | |
285 | }; | |
c906108c | 286 | |
c5aa993b | 287 | static int diecount; /* Approximate count of dies for compilation unit */ |
c906108c SS |
288 | static struct dieinfo *curdie; /* For warnings and such */ |
289 | ||
c5aa993b JM |
290 | static char *dbbase; /* Base pointer to dwarf info */ |
291 | static int dbsize; /* Size of dwarf info in bytes */ | |
292 | static int dbroff; /* Relative offset from start of .debug section */ | |
293 | static char *lnbase; /* Base pointer to line section */ | |
c906108c SS |
294 | |
295 | /* This value is added to each symbol value. FIXME: Generalize to | |
296 | the section_offsets structure used by dbxread (once this is done, | |
297 | pass the appropriate section number to end_symtab). */ | |
298 | static CORE_ADDR baseaddr; /* Add to each symbol value */ | |
299 | ||
300 | /* The section offsets used in the current psymtab or symtab. FIXME, | |
301 | only used to pass one value (baseaddr) at the moment. */ | |
302 | static struct section_offsets *base_section_offsets; | |
303 | ||
304 | /* We put a pointer to this structure in the read_symtab_private field | |
305 | of the psymtab. */ | |
306 | ||
c5aa993b JM |
307 | struct dwfinfo |
308 | { | |
309 | /* Always the absolute file offset to the start of the ".debug" | |
310 | section for the file containing the DIE's being accessed. */ | |
311 | file_ptr dbfoff; | |
312 | /* Relative offset from the start of the ".debug" section to the | |
313 | first DIE to be accessed. When building the partial symbol | |
314 | table, this value will be zero since we are accessing the | |
315 | entire ".debug" section. When expanding a partial symbol | |
316 | table entry, this value will be the offset to the first | |
317 | DIE for the compilation unit containing the symbol that | |
318 | triggers the expansion. */ | |
319 | int dbroff; | |
320 | /* The size of the chunk of DIE's being examined, in bytes. */ | |
321 | int dblength; | |
322 | /* The absolute file offset to the line table fragment. Ignored | |
323 | when building partial symbol tables, but used when expanding | |
324 | them, and contains the absolute file offset to the fragment | |
325 | of the ".line" section containing the line numbers for the | |
326 | current compilation unit. */ | |
327 | file_ptr lnfoff; | |
328 | }; | |
c906108c SS |
329 | |
330 | #define DBFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbfoff) | |
331 | #define DBROFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbroff) | |
332 | #define DBLENGTH(p) (((struct dwfinfo *)((p)->read_symtab_private))->dblength) | |
333 | #define LNFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->lnfoff) | |
334 | ||
335 | /* The generic symbol table building routines have separate lists for | |
336 | file scope symbols and all all other scopes (local scopes). So | |
337 | we need to select the right one to pass to add_symbol_to_list(). | |
338 | We do it by keeping a pointer to the correct list in list_in_scope. | |
339 | ||
340 | FIXME: The original dwarf code just treated the file scope as the first | |
341 | local scope, and all other local scopes as nested local scopes, and worked | |
342 | fine. Check to see if we really need to distinguish these in buildsym.c */ | |
343 | ||
344 | struct pending **list_in_scope = &file_symbols; | |
345 | ||
346 | /* DIES which have user defined types or modified user defined types refer to | |
347 | other DIES for the type information. Thus we need to associate the offset | |
348 | of a DIE for a user defined type with a pointer to the type information. | |
349 | ||
350 | Originally this was done using a simple but expensive algorithm, with an | |
351 | array of unsorted structures, each containing an offset/type-pointer pair. | |
352 | This array was scanned linearly each time a lookup was done. The result | |
353 | was that gdb was spending over half it's startup time munging through this | |
354 | array of pointers looking for a structure that had the right offset member. | |
355 | ||
356 | The second attempt used the same array of structures, but the array was | |
357 | sorted using qsort each time a new offset/type was recorded, and a binary | |
358 | search was used to find the type pointer for a given DIE offset. This was | |
359 | even slower, due to the overhead of sorting the array each time a new | |
360 | offset/type pair was entered. | |
361 | ||
362 | The third attempt uses a fixed size array of type pointers, indexed by a | |
363 | value derived from the DIE offset. Since the minimum DIE size is 4 bytes, | |
364 | we can divide any DIE offset by 4 to obtain a unique index into this fixed | |
365 | size array. Since each element is a 4 byte pointer, it takes exactly as | |
366 | much memory to hold this array as to hold the DWARF info for a given | |
367 | compilation unit. But it gets freed as soon as we are done with it. | |
368 | This has worked well in practice, as a reasonable tradeoff between memory | |
369 | consumption and speed, without having to resort to much more complicated | |
370 | algorithms. */ | |
371 | ||
372 | static struct type **utypes; /* Pointer to array of user type pointers */ | |
373 | static int numutypes; /* Max number of user type pointers */ | |
374 | ||
375 | /* Maintain an array of referenced fundamental types for the current | |
376 | compilation unit being read. For DWARF version 1, we have to construct | |
377 | the fundamental types on the fly, since no information about the | |
378 | fundamental types is supplied. Each such fundamental type is created by | |
379 | calling a language dependent routine to create the type, and then a | |
380 | pointer to that type is then placed in the array at the index specified | |
381 | by it's FT_<TYPENAME> value. The array has a fixed size set by the | |
382 | FT_NUM_MEMBERS compile time constant, which is the number of predefined | |
383 | fundamental types gdb knows how to construct. */ | |
384 | ||
c5aa993b | 385 | static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */ |
c906108c SS |
386 | |
387 | /* Record the language for the compilation unit which is currently being | |
388 | processed. We know it once we have seen the TAG_compile_unit DIE, | |
389 | and we need it while processing the DIE's for that compilation unit. | |
390 | It is eventually saved in the symtab structure, but we don't finalize | |
391 | the symtab struct until we have processed all the DIE's for the | |
392 | compilation unit. We also need to get and save a pointer to the | |
393 | language struct for this language, so we can call the language | |
394 | dependent routines for doing things such as creating fundamental | |
395 | types. */ | |
396 | ||
397 | static enum language cu_language; | |
398 | static const struct language_defn *cu_language_defn; | |
399 | ||
400 | /* Forward declarations of static functions so we don't have to worry | |
401 | about ordering within this file. */ | |
402 | ||
4efb68b1 | 403 | static void free_utypes (void *); |
c906108c | 404 | |
a14ed312 | 405 | static int attribute_size (unsigned int); |
c906108c | 406 | |
a14ed312 | 407 | static CORE_ADDR target_to_host (char *, int, int, struct objfile *); |
c906108c | 408 | |
a14ed312 | 409 | static void add_enum_psymbol (struct dieinfo *, struct objfile *); |
c906108c | 410 | |
a14ed312 | 411 | static void handle_producer (char *); |
c906108c | 412 | |
570b8f7c AC |
413 | static void read_file_scope (struct dieinfo *, char *, char *, |
414 | struct objfile *); | |
c906108c | 415 | |
570b8f7c AC |
416 | static void read_func_scope (struct dieinfo *, char *, char *, |
417 | struct objfile *); | |
c906108c | 418 | |
570b8f7c AC |
419 | static void read_lexical_block_scope (struct dieinfo *, char *, char *, |
420 | struct objfile *); | |
c906108c | 421 | |
a14ed312 | 422 | static void scan_partial_symbols (char *, char *, struct objfile *); |
c906108c | 423 | |
570b8f7c AC |
424 | static void scan_compilation_units (char *, char *, file_ptr, file_ptr, |
425 | struct objfile *); | |
c906108c | 426 | |
a14ed312 | 427 | static void add_partial_symbol (struct dieinfo *, struct objfile *); |
c906108c | 428 | |
a14ed312 | 429 | static void basicdieinfo (struct dieinfo *, char *, struct objfile *); |
c906108c | 430 | |
a14ed312 | 431 | static void completedieinfo (struct dieinfo *, struct objfile *); |
c906108c | 432 | |
a14ed312 | 433 | static void dwarf_psymtab_to_symtab (struct partial_symtab *); |
c906108c | 434 | |
a14ed312 | 435 | static void psymtab_to_symtab_1 (struct partial_symtab *); |
c906108c | 436 | |
a14ed312 | 437 | static void read_ofile_symtab (struct partial_symtab *); |
c906108c | 438 | |
a14ed312 | 439 | static void process_dies (char *, char *, struct objfile *); |
c906108c | 440 | |
570b8f7c AC |
441 | static void read_structure_scope (struct dieinfo *, char *, char *, |
442 | struct objfile *); | |
c906108c | 443 | |
a14ed312 | 444 | static struct type *decode_array_element_type (char *); |
c906108c | 445 | |
a14ed312 | 446 | static struct type *decode_subscript_data_item (char *, char *); |
c906108c | 447 | |
a14ed312 | 448 | static void dwarf_read_array_type (struct dieinfo *); |
c906108c | 449 | |
a14ed312 | 450 | static void read_tag_pointer_type (struct dieinfo *dip); |
c906108c | 451 | |
a14ed312 | 452 | static void read_tag_string_type (struct dieinfo *dip); |
c906108c | 453 | |
a14ed312 | 454 | static void read_subroutine_type (struct dieinfo *, char *, char *); |
c906108c | 455 | |
570b8f7c AC |
456 | static void read_enumeration (struct dieinfo *, char *, char *, |
457 | struct objfile *); | |
c906108c | 458 | |
a14ed312 KB |
459 | static struct type *struct_type (struct dieinfo *, char *, char *, |
460 | struct objfile *); | |
c906108c | 461 | |
a14ed312 | 462 | static struct type *enum_type (struct dieinfo *, struct objfile *); |
c906108c | 463 | |
a14ed312 | 464 | static void decode_line_numbers (char *); |
c906108c | 465 | |
a14ed312 | 466 | static struct type *decode_die_type (struct dieinfo *); |
c906108c | 467 | |
a14ed312 | 468 | static struct type *decode_mod_fund_type (char *); |
c906108c | 469 | |
a14ed312 | 470 | static struct type *decode_mod_u_d_type (char *); |
c906108c | 471 | |
a14ed312 | 472 | static struct type *decode_modified_type (char *, unsigned int, int); |
c906108c | 473 | |
a14ed312 | 474 | static struct type *decode_fund_type (unsigned int); |
c906108c | 475 | |
a14ed312 | 476 | static char *create_name (char *, struct obstack *); |
c906108c | 477 | |
a14ed312 | 478 | static struct type *lookup_utype (DIE_REF); |
c906108c | 479 | |
a14ed312 | 480 | static struct type *alloc_utype (DIE_REF, struct type *); |
c906108c | 481 | |
a14ed312 | 482 | static struct symbol *new_symbol (struct dieinfo *, struct objfile *); |
c906108c | 483 | |
570b8f7c AC |
484 | static void synthesize_typedef (struct dieinfo *, struct objfile *, |
485 | struct type *); | |
c906108c | 486 | |
a14ed312 | 487 | static int locval (struct dieinfo *); |
c906108c | 488 | |
a14ed312 | 489 | static void set_cu_language (struct dieinfo *); |
c906108c | 490 | |
a14ed312 | 491 | static struct type *dwarf_fundamental_type (struct objfile *, int); |
c906108c SS |
492 | |
493 | ||
494 | /* | |
495 | ||
c5aa993b | 496 | LOCAL FUNCTION |
c906108c | 497 | |
c5aa993b | 498 | dwarf_fundamental_type -- lookup or create a fundamental type |
c906108c | 499 | |
c5aa993b | 500 | SYNOPSIS |
c906108c | 501 | |
c5aa993b JM |
502 | struct type * |
503 | dwarf_fundamental_type (struct objfile *objfile, int typeid) | |
c906108c | 504 | |
c5aa993b | 505 | DESCRIPTION |
c906108c | 506 | |
c5aa993b JM |
507 | DWARF version 1 doesn't supply any fundamental type information, |
508 | so gdb has to construct such types. It has a fixed number of | |
509 | fundamental types that it knows how to construct, which is the | |
510 | union of all types that it knows how to construct for all languages | |
511 | that it knows about. These are enumerated in gdbtypes.h. | |
c906108c | 512 | |
c5aa993b JM |
513 | As an example, assume we find a DIE that references a DWARF |
514 | fundamental type of FT_integer. We first look in the ftypes | |
515 | array to see if we already have such a type, indexed by the | |
516 | gdb internal value of FT_INTEGER. If so, we simply return a | |
517 | pointer to that type. If not, then we ask an appropriate | |
518 | language dependent routine to create a type FT_INTEGER, using | |
519 | defaults reasonable for the current target machine, and install | |
520 | that type in ftypes for future reference. | |
c906108c | 521 | |
c5aa993b | 522 | RETURNS |
c906108c | 523 | |
c5aa993b | 524 | Pointer to a fundamental type. |
c906108c | 525 | |
c5aa993b | 526 | */ |
c906108c SS |
527 | |
528 | static struct type * | |
fba45db2 | 529 | dwarf_fundamental_type (struct objfile *objfile, int typeid) |
c906108c SS |
530 | { |
531 | if (typeid < 0 || typeid >= FT_NUM_MEMBERS) | |
532 | { | |
533 | error ("internal error - invalid fundamental type id %d", typeid); | |
534 | } | |
535 | ||
536 | /* Look for this particular type in the fundamental type vector. If one is | |
537 | not found, create and install one appropriate for the current language | |
538 | and the current target machine. */ | |
539 | ||
540 | if (ftypes[typeid] == NULL) | |
541 | { | |
c5aa993b | 542 | ftypes[typeid] = cu_language_defn->la_fund_type (objfile, typeid); |
c906108c SS |
543 | } |
544 | ||
545 | return (ftypes[typeid]); | |
546 | } | |
547 | ||
548 | /* | |
549 | ||
c5aa993b | 550 | LOCAL FUNCTION |
c906108c | 551 | |
c5aa993b | 552 | set_cu_language -- set local copy of language for compilation unit |
c906108c | 553 | |
c5aa993b | 554 | SYNOPSIS |
c906108c | 555 | |
c5aa993b JM |
556 | void |
557 | set_cu_language (struct dieinfo *dip) | |
c906108c | 558 | |
c5aa993b | 559 | DESCRIPTION |
c906108c | 560 | |
c5aa993b JM |
561 | Decode the language attribute for a compilation unit DIE and |
562 | remember what the language was. We use this at various times | |
563 | when processing DIE's for a given compilation unit. | |
c906108c | 564 | |
c5aa993b | 565 | RETURNS |
c906108c | 566 | |
c5aa993b | 567 | No return value. |
c906108c SS |
568 | |
569 | */ | |
570 | ||
571 | static void | |
fba45db2 | 572 | set_cu_language (struct dieinfo *dip) |
c906108c | 573 | { |
c5aa993b | 574 | switch (dip->at_language) |
c906108c | 575 | { |
c5aa993b JM |
576 | case LANG_C89: |
577 | case LANG_C: | |
578 | cu_language = language_c; | |
579 | break; | |
580 | case LANG_C_PLUS_PLUS: | |
581 | cu_language = language_cplus; | |
582 | break; | |
c5aa993b JM |
583 | case LANG_MODULA2: |
584 | cu_language = language_m2; | |
585 | break; | |
586 | case LANG_FORTRAN77: | |
587 | case LANG_FORTRAN90: | |
588 | cu_language = language_fortran; | |
589 | break; | |
590 | case LANG_ADA83: | |
591 | case LANG_COBOL74: | |
592 | case LANG_COBOL85: | |
593 | case LANG_PASCAL83: | |
594 | /* We don't know anything special about these yet. */ | |
595 | cu_language = language_unknown; | |
596 | break; | |
597 | default: | |
598 | /* If no at_language, try to deduce one from the filename */ | |
599 | cu_language = deduce_language_from_filename (dip->at_name); | |
600 | break; | |
c906108c SS |
601 | } |
602 | cu_language_defn = language_def (cu_language); | |
603 | } | |
604 | ||
605 | /* | |
606 | ||
c5aa993b | 607 | GLOBAL FUNCTION |
c906108c | 608 | |
c5aa993b | 609 | dwarf_build_psymtabs -- build partial symtabs from DWARF debug info |
c906108c | 610 | |
c5aa993b | 611 | SYNOPSIS |
c906108c | 612 | |
c5aa993b | 613 | void dwarf_build_psymtabs (struct objfile *objfile, |
c5aa993b JM |
614 | int mainline, file_ptr dbfoff, unsigned int dbfsize, |
615 | file_ptr lnoffset, unsigned int lnsize) | |
c906108c | 616 | |
c5aa993b | 617 | DESCRIPTION |
c906108c | 618 | |
c5aa993b JM |
619 | This function is called upon to build partial symtabs from files |
620 | containing DIE's (Dwarf Information Entries) and DWARF line numbers. | |
c906108c | 621 | |
c5aa993b JM |
622 | It is passed a bfd* containing the DIES |
623 | and line number information, the corresponding filename for that | |
624 | file, a base address for relocating the symbols, a flag indicating | |
625 | whether or not this debugging information is from a "main symbol | |
626 | table" rather than a shared library or dynamically linked file, | |
627 | and file offset/size pairs for the DIE information and line number | |
628 | information. | |
c906108c | 629 | |
c5aa993b | 630 | RETURNS |
c906108c | 631 | |
c5aa993b | 632 | No return value. |
c906108c SS |
633 | |
634 | */ | |
635 | ||
636 | void | |
fba45db2 KB |
637 | dwarf_build_psymtabs (struct objfile *objfile, int mainline, file_ptr dbfoff, |
638 | unsigned int dbfsize, file_ptr lnoffset, | |
639 | unsigned int lnsize) | |
c906108c SS |
640 | { |
641 | bfd *abfd = objfile->obfd; | |
642 | struct cleanup *back_to; | |
c5aa993b | 643 | |
c906108c SS |
644 | current_objfile = objfile; |
645 | dbsize = dbfsize; | |
646 | dbbase = xmalloc (dbsize); | |
647 | dbroff = 0; | |
648 | if ((bfd_seek (abfd, dbfoff, SEEK_SET) != 0) || | |
3a42e9d0 | 649 | (bfd_bread (dbbase, dbsize, abfd) != dbsize)) |
c906108c | 650 | { |
b8c9b27d | 651 | xfree (dbbase); |
c906108c SS |
652 | error ("can't read DWARF data from '%s'", bfd_get_filename (abfd)); |
653 | } | |
b8c9b27d | 654 | back_to = make_cleanup (xfree, dbbase); |
c5aa993b | 655 | |
c906108c SS |
656 | /* If we are reinitializing, or if we have never loaded syms yet, init. |
657 | Since we have no idea how many DIES we are looking at, we just guess | |
658 | some arbitrary value. */ | |
c5aa993b | 659 | |
ef96bde8 EZ |
660 | if (mainline |
661 | || (objfile->global_psymbols.size == 0 | |
662 | && objfile->static_psymbols.size == 0)) | |
c906108c SS |
663 | { |
664 | init_psymbol_list (objfile, 1024); | |
665 | } | |
c5aa993b | 666 | |
c906108c SS |
667 | /* Save the relocation factor where everybody can see it. */ |
668 | ||
d4f3574e SS |
669 | base_section_offsets = objfile->section_offsets; |
670 | baseaddr = ANOFFSET (objfile->section_offsets, 0); | |
c906108c SS |
671 | |
672 | /* Follow the compilation unit sibling chain, building a partial symbol | |
673 | table entry for each one. Save enough information about each compilation | |
674 | unit to locate the full DWARF information later. */ | |
c5aa993b | 675 | |
c906108c | 676 | scan_compilation_units (dbbase, dbbase + dbsize, dbfoff, lnoffset, objfile); |
c5aa993b | 677 | |
c906108c SS |
678 | do_cleanups (back_to); |
679 | current_objfile = NULL; | |
680 | } | |
681 | ||
682 | /* | |
683 | ||
c5aa993b | 684 | LOCAL FUNCTION |
c906108c | 685 | |
c5aa993b | 686 | read_lexical_block_scope -- process all dies in a lexical block |
c906108c | 687 | |
c5aa993b | 688 | SYNOPSIS |
c906108c | 689 | |
c5aa993b JM |
690 | static void read_lexical_block_scope (struct dieinfo *dip, |
691 | char *thisdie, char *enddie) | |
c906108c | 692 | |
c5aa993b | 693 | DESCRIPTION |
c906108c | 694 | |
c5aa993b JM |
695 | Process all the DIES contained within a lexical block scope. |
696 | Start a new scope, process the dies, and then close the scope. | |
c906108c SS |
697 | |
698 | */ | |
699 | ||
700 | static void | |
fba45db2 KB |
701 | read_lexical_block_scope (struct dieinfo *dip, char *thisdie, char *enddie, |
702 | struct objfile *objfile) | |
c906108c | 703 | { |
b59661bd | 704 | struct context_stack *new; |
c906108c | 705 | |
c5aa993b JM |
706 | push_context (0, dip->at_low_pc); |
707 | process_dies (thisdie + dip->die_length, enddie, objfile); | |
c906108c SS |
708 | new = pop_context (); |
709 | if (local_symbols != NULL) | |
710 | { | |
c5aa993b JM |
711 | finish_block (0, &local_symbols, new->old_blocks, new->start_addr, |
712 | dip->at_high_pc, objfile); | |
c906108c | 713 | } |
c5aa993b | 714 | local_symbols = new->locals; |
c906108c SS |
715 | } |
716 | ||
717 | /* | |
718 | ||
c5aa993b | 719 | LOCAL FUNCTION |
c906108c | 720 | |
c5aa993b | 721 | lookup_utype -- look up a user defined type from die reference |
c906108c | 722 | |
c5aa993b | 723 | SYNOPSIS |
c906108c | 724 | |
c5aa993b | 725 | static type *lookup_utype (DIE_REF die_ref) |
c906108c | 726 | |
c5aa993b | 727 | DESCRIPTION |
c906108c | 728 | |
c5aa993b JM |
729 | Given a DIE reference, lookup the user defined type associated with |
730 | that DIE, if it has been registered already. If not registered, then | |
731 | return NULL. Alloc_utype() can be called to register an empty | |
732 | type for this reference, which will be filled in later when the | |
733 | actual referenced DIE is processed. | |
c906108c SS |
734 | */ |
735 | ||
736 | static struct type * | |
fba45db2 | 737 | lookup_utype (DIE_REF die_ref) |
c906108c SS |
738 | { |
739 | struct type *type = NULL; | |
740 | int utypeidx; | |
c5aa993b | 741 | |
c906108c SS |
742 | utypeidx = (die_ref - dbroff) / 4; |
743 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
744 | { | |
23136709 | 745 | bad_die_ref_complaint (DIE_ID, DIE_NAME, die_ref); |
c906108c SS |
746 | } |
747 | else | |
748 | { | |
749 | type = *(utypes + utypeidx); | |
750 | } | |
751 | return (type); | |
752 | } | |
753 | ||
754 | ||
755 | /* | |
756 | ||
c5aa993b | 757 | LOCAL FUNCTION |
c906108c | 758 | |
c5aa993b | 759 | alloc_utype -- add a user defined type for die reference |
c906108c | 760 | |
c5aa993b | 761 | SYNOPSIS |
c906108c | 762 | |
c5aa993b | 763 | static type *alloc_utype (DIE_REF die_ref, struct type *utypep) |
c906108c | 764 | |
c5aa993b | 765 | DESCRIPTION |
c906108c | 766 | |
c5aa993b JM |
767 | Given a die reference DIE_REF, and a possible pointer to a user |
768 | defined type UTYPEP, register that this reference has a user | |
769 | defined type and either use the specified type in UTYPEP or | |
770 | make a new empty type that will be filled in later. | |
c906108c | 771 | |
c5aa993b JM |
772 | We should only be called after calling lookup_utype() to verify that |
773 | there is not currently a type registered for DIE_REF. | |
c906108c SS |
774 | */ |
775 | ||
776 | static struct type * | |
fba45db2 | 777 | alloc_utype (DIE_REF die_ref, struct type *utypep) |
c906108c SS |
778 | { |
779 | struct type **typep; | |
780 | int utypeidx; | |
c5aa993b | 781 | |
c906108c SS |
782 | utypeidx = (die_ref - dbroff) / 4; |
783 | typep = utypes + utypeidx; | |
784 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
785 | { | |
786 | utypep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
23136709 | 787 | bad_die_ref_complaint (DIE_ID, DIE_NAME, die_ref); |
c906108c SS |
788 | } |
789 | else if (*typep != NULL) | |
790 | { | |
791 | utypep = *typep; | |
23136709 KB |
792 | complaint (&symfile_complaints, |
793 | "DIE @ 0x%x \"%s\", internal error: duplicate user type allocation", | |
794 | DIE_ID, DIE_NAME); | |
c906108c SS |
795 | } |
796 | else | |
797 | { | |
798 | if (utypep == NULL) | |
799 | { | |
800 | utypep = alloc_type (current_objfile); | |
801 | } | |
802 | *typep = utypep; | |
803 | } | |
804 | return (utypep); | |
805 | } | |
806 | ||
807 | /* | |
808 | ||
c5aa993b | 809 | LOCAL FUNCTION |
c906108c | 810 | |
c5aa993b | 811 | free_utypes -- free the utypes array and reset pointer & count |
c906108c | 812 | |
c5aa993b | 813 | SYNOPSIS |
c906108c | 814 | |
4efb68b1 | 815 | static void free_utypes (void *dummy) |
c906108c | 816 | |
c5aa993b | 817 | DESCRIPTION |
c906108c | 818 | |
c5aa993b JM |
819 | Called via do_cleanups to free the utypes array, reset the pointer to NULL, |
820 | and set numutypes back to zero. This ensures that the utypes does not get | |
821 | referenced after being freed. | |
c906108c SS |
822 | */ |
823 | ||
824 | static void | |
4efb68b1 | 825 | free_utypes (void *dummy) |
c906108c | 826 | { |
b8c9b27d | 827 | xfree (utypes); |
c906108c SS |
828 | utypes = NULL; |
829 | numutypes = 0; | |
830 | } | |
831 | ||
832 | ||
833 | /* | |
834 | ||
c5aa993b | 835 | LOCAL FUNCTION |
c906108c | 836 | |
c5aa993b | 837 | decode_die_type -- return a type for a specified die |
c906108c | 838 | |
c5aa993b | 839 | SYNOPSIS |
c906108c | 840 | |
c5aa993b | 841 | static struct type *decode_die_type (struct dieinfo *dip) |
c906108c | 842 | |
c5aa993b | 843 | DESCRIPTION |
c906108c | 844 | |
c5aa993b JM |
845 | Given a pointer to a die information structure DIP, decode the |
846 | type of the die and return a pointer to the decoded type. All | |
847 | dies without specific types default to type int. | |
c906108c SS |
848 | */ |
849 | ||
850 | static struct type * | |
fba45db2 | 851 | decode_die_type (struct dieinfo *dip) |
c906108c SS |
852 | { |
853 | struct type *type = NULL; | |
c5aa993b JM |
854 | |
855 | if (dip->at_fund_type != 0) | |
c906108c | 856 | { |
c5aa993b | 857 | type = decode_fund_type (dip->at_fund_type); |
c906108c | 858 | } |
c5aa993b | 859 | else if (dip->at_mod_fund_type != NULL) |
c906108c | 860 | { |
c5aa993b | 861 | type = decode_mod_fund_type (dip->at_mod_fund_type); |
c906108c | 862 | } |
c5aa993b | 863 | else if (dip->at_user_def_type) |
c906108c | 864 | { |
b59661bd AC |
865 | type = lookup_utype (dip->at_user_def_type); |
866 | if (type == NULL) | |
c906108c | 867 | { |
c5aa993b | 868 | type = alloc_utype (dip->at_user_def_type, NULL); |
c906108c SS |
869 | } |
870 | } | |
c5aa993b | 871 | else if (dip->at_mod_u_d_type) |
c906108c | 872 | { |
c5aa993b | 873 | type = decode_mod_u_d_type (dip->at_mod_u_d_type); |
c906108c SS |
874 | } |
875 | else | |
876 | { | |
877 | type = dwarf_fundamental_type (current_objfile, FT_VOID); | |
878 | } | |
879 | return (type); | |
880 | } | |
881 | ||
882 | /* | |
883 | ||
c5aa993b | 884 | LOCAL FUNCTION |
c906108c | 885 | |
c5aa993b | 886 | struct_type -- compute and return the type for a struct or union |
c906108c | 887 | |
c5aa993b | 888 | SYNOPSIS |
c906108c | 889 | |
c5aa993b JM |
890 | static struct type *struct_type (struct dieinfo *dip, char *thisdie, |
891 | char *enddie, struct objfile *objfile) | |
c906108c | 892 | |
c5aa993b | 893 | DESCRIPTION |
c906108c | 894 | |
c5aa993b JM |
895 | Given pointer to a die information structure for a die which |
896 | defines a union or structure (and MUST define one or the other), | |
897 | and pointers to the raw die data that define the range of dies which | |
898 | define the members, compute and return the user defined type for the | |
899 | structure or union. | |
c906108c SS |
900 | */ |
901 | ||
902 | static struct type * | |
fba45db2 KB |
903 | struct_type (struct dieinfo *dip, char *thisdie, char *enddie, |
904 | struct objfile *objfile) | |
c906108c SS |
905 | { |
906 | struct type *type; | |
c5aa993b JM |
907 | struct nextfield |
908 | { | |
909 | struct nextfield *next; | |
910 | struct field field; | |
911 | }; | |
c906108c SS |
912 | struct nextfield *list = NULL; |
913 | struct nextfield *new; | |
914 | int nfields = 0; | |
915 | int n; | |
916 | struct dieinfo mbr; | |
917 | char *nextdie; | |
918 | int anonymous_size; | |
c5aa993b | 919 | |
b59661bd AC |
920 | type = lookup_utype (dip->die_ref); |
921 | if (type == NULL) | |
c906108c SS |
922 | { |
923 | /* No forward references created an empty type, so install one now */ | |
c5aa993b | 924 | type = alloc_utype (dip->die_ref, NULL); |
c906108c | 925 | } |
c5aa993b JM |
926 | INIT_CPLUS_SPECIFIC (type); |
927 | switch (dip->die_tag) | |
c906108c | 928 | { |
c5aa993b JM |
929 | case TAG_class_type: |
930 | TYPE_CODE (type) = TYPE_CODE_CLASS; | |
931 | break; | |
932 | case TAG_structure_type: | |
933 | TYPE_CODE (type) = TYPE_CODE_STRUCT; | |
934 | break; | |
935 | case TAG_union_type: | |
936 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
937 | break; | |
938 | default: | |
939 | /* Should never happen */ | |
940 | TYPE_CODE (type) = TYPE_CODE_UNDEF; | |
23136709 KB |
941 | complaint (&symfile_complaints, |
942 | "DIE @ 0x%x \"%s\", missing class, structure, or union tag", | |
943 | DIE_ID, DIE_NAME); | |
c5aa993b | 944 | break; |
c906108c SS |
945 | } |
946 | /* Some compilers try to be helpful by inventing "fake" names for | |
947 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
948 | Thanks, but no thanks... */ | |
c5aa993b JM |
949 | if (dip->at_name != NULL |
950 | && *dip->at_name != '~' | |
951 | && *dip->at_name != '.') | |
c906108c | 952 | { |
c5aa993b JM |
953 | TYPE_TAG_NAME (type) = obconcat (&objfile->type_obstack, |
954 | "", "", dip->at_name); | |
c906108c SS |
955 | } |
956 | /* Use whatever size is known. Zero is a valid size. We might however | |
957 | wish to check has_at_byte_size to make sure that some byte size was | |
958 | given explicitly, but DWARF doesn't specify that explicit sizes of | |
959 | zero have to present, so complaining about missing sizes should | |
960 | probably not be the default. */ | |
c5aa993b JM |
961 | TYPE_LENGTH (type) = dip->at_byte_size; |
962 | thisdie += dip->die_length; | |
c906108c SS |
963 | while (thisdie < enddie) |
964 | { | |
965 | basicdieinfo (&mbr, thisdie, objfile); | |
966 | completedieinfo (&mbr, objfile); | |
967 | if (mbr.die_length <= SIZEOF_DIE_LENGTH) | |
968 | { | |
969 | break; | |
970 | } | |
971 | else if (mbr.at_sibling != 0) | |
972 | { | |
973 | nextdie = dbbase + mbr.at_sibling - dbroff; | |
974 | } | |
975 | else | |
976 | { | |
977 | nextdie = thisdie + mbr.die_length; | |
978 | } | |
979 | switch (mbr.die_tag) | |
980 | { | |
981 | case TAG_member: | |
fba3138e DJ |
982 | /* Static fields can be either TAG_global_variable (GCC) or else |
983 | TAG_member with no location (Diab). We could treat the latter like | |
984 | the former... but since we don't support the former, just avoid | |
985 | crashing on the latter for now. */ | |
986 | if (mbr.at_location == NULL) | |
987 | break; | |
988 | ||
c906108c SS |
989 | /* Get space to record the next field's data. */ |
990 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
c5aa993b | 991 | new->next = list; |
c906108c SS |
992 | list = new; |
993 | /* Save the data. */ | |
c5aa993b JM |
994 | list->field.name = |
995 | obsavestring (mbr.at_name, strlen (mbr.at_name), | |
996 | &objfile->type_obstack); | |
c906108c SS |
997 | FIELD_TYPE (list->field) = decode_die_type (&mbr); |
998 | FIELD_BITPOS (list->field) = 8 * locval (&mbr); | |
01ad7f36 | 999 | FIELD_STATIC_KIND (list->field) = 0; |
c906108c SS |
1000 | /* Handle bit fields. */ |
1001 | FIELD_BITSIZE (list->field) = mbr.at_bit_size; | |
1002 | if (BITS_BIG_ENDIAN) | |
1003 | { | |
1004 | /* For big endian bits, the at_bit_offset gives the | |
c5aa993b JM |
1005 | additional bit offset from the MSB of the containing |
1006 | anonymous object to the MSB of the field. We don't | |
1007 | have to do anything special since we don't need to | |
1008 | know the size of the anonymous object. */ | |
c906108c SS |
1009 | FIELD_BITPOS (list->field) += mbr.at_bit_offset; |
1010 | } | |
1011 | else | |
1012 | { | |
1013 | /* For little endian bits, we need to have a non-zero | |
c5aa993b JM |
1014 | at_bit_size, so that we know we are in fact dealing |
1015 | with a bitfield. Compute the bit offset to the MSB | |
1016 | of the anonymous object, subtract off the number of | |
1017 | bits from the MSB of the field to the MSB of the | |
1018 | object, and then subtract off the number of bits of | |
1019 | the field itself. The result is the bit offset of | |
1020 | the LSB of the field. */ | |
c906108c SS |
1021 | if (mbr.at_bit_size > 0) |
1022 | { | |
1023 | if (mbr.has_at_byte_size) | |
1024 | { | |
1025 | /* The size of the anonymous object containing | |
c5aa993b JM |
1026 | the bit field is explicit, so use the |
1027 | indicated size (in bytes). */ | |
c906108c SS |
1028 | anonymous_size = mbr.at_byte_size; |
1029 | } | |
1030 | else | |
1031 | { | |
1032 | /* The size of the anonymous object containing | |
c5aa993b JM |
1033 | the bit field matches the size of an object |
1034 | of the bit field's type. DWARF allows | |
1035 | at_byte_size to be left out in such cases, as | |
1036 | a debug information size optimization. */ | |
1037 | anonymous_size = TYPE_LENGTH (list->field.type); | |
c906108c SS |
1038 | } |
1039 | FIELD_BITPOS (list->field) += | |
1040 | anonymous_size * 8 - mbr.at_bit_offset - mbr.at_bit_size; | |
1041 | } | |
1042 | } | |
1043 | nfields++; | |
1044 | break; | |
1045 | default: | |
1046 | process_dies (thisdie, nextdie, objfile); | |
1047 | break; | |
1048 | } | |
1049 | thisdie = nextdie; | |
1050 | } | |
1051 | /* Now create the vector of fields, and record how big it is. We may | |
1052 | not even have any fields, if this DIE was generated due to a reference | |
1053 | to an anonymous structure or union. In this case, TYPE_FLAG_STUB is | |
1054 | set, which clues gdb in to the fact that it needs to search elsewhere | |
1055 | for the full structure definition. */ | |
1056 | if (nfields == 0) | |
1057 | { | |
1058 | TYPE_FLAGS (type) |= TYPE_FLAG_STUB; | |
1059 | } | |
1060 | else | |
1061 | { | |
1062 | TYPE_NFIELDS (type) = nfields; | |
1063 | TYPE_FIELDS (type) = (struct field *) | |
1064 | TYPE_ALLOC (type, sizeof (struct field) * nfields); | |
1065 | /* Copy the saved-up fields into the field vector. */ | |
c5aa993b | 1066 | for (n = nfields; list; list = list->next) |
c906108c | 1067 | { |
c5aa993b JM |
1068 | TYPE_FIELD (type, --n) = list->field; |
1069 | } | |
c906108c SS |
1070 | } |
1071 | return (type); | |
1072 | } | |
1073 | ||
1074 | /* | |
1075 | ||
c5aa993b | 1076 | LOCAL FUNCTION |
c906108c | 1077 | |
c5aa993b | 1078 | read_structure_scope -- process all dies within struct or union |
c906108c | 1079 | |
c5aa993b | 1080 | SYNOPSIS |
c906108c | 1081 | |
c5aa993b JM |
1082 | static void read_structure_scope (struct dieinfo *dip, |
1083 | char *thisdie, char *enddie, struct objfile *objfile) | |
c906108c | 1084 | |
c5aa993b | 1085 | DESCRIPTION |
c906108c | 1086 | |
c5aa993b JM |
1087 | Called when we find the DIE that starts a structure or union |
1088 | scope (definition) to process all dies that define the members | |
1089 | of the structure or union. DIP is a pointer to the die info | |
1090 | struct for the DIE that names the structure or union. | |
c906108c | 1091 | |
c5aa993b JM |
1092 | NOTES |
1093 | ||
1094 | Note that we need to call struct_type regardless of whether or not | |
1095 | the DIE has an at_name attribute, since it might be an anonymous | |
1096 | structure or union. This gets the type entered into our set of | |
1097 | user defined types. | |
1098 | ||
1099 | However, if the structure is incomplete (an opaque struct/union) | |
1100 | then suppress creating a symbol table entry for it since gdb only | |
1101 | wants to find the one with the complete definition. Note that if | |
1102 | it is complete, we just call new_symbol, which does it's own | |
1103 | checking about whether the struct/union is anonymous or not (and | |
1104 | suppresses creating a symbol table entry itself). | |
c906108c | 1105 | |
c906108c SS |
1106 | */ |
1107 | ||
1108 | static void | |
fba45db2 KB |
1109 | read_structure_scope (struct dieinfo *dip, char *thisdie, char *enddie, |
1110 | struct objfile *objfile) | |
c906108c SS |
1111 | { |
1112 | struct type *type; | |
1113 | struct symbol *sym; | |
c5aa993b | 1114 | |
c906108c | 1115 | type = struct_type (dip, thisdie, enddie, objfile); |
74a9bb82 | 1116 | if (!TYPE_STUB (type)) |
c906108c SS |
1117 | { |
1118 | sym = new_symbol (dip, objfile); | |
1119 | if (sym != NULL) | |
1120 | { | |
1121 | SYMBOL_TYPE (sym) = type; | |
1122 | if (cu_language == language_cplus) | |
1123 | { | |
1124 | synthesize_typedef (dip, objfile, type); | |
1125 | } | |
1126 | } | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | /* | |
1131 | ||
c5aa993b | 1132 | LOCAL FUNCTION |
c906108c | 1133 | |
c5aa993b | 1134 | decode_array_element_type -- decode type of the array elements |
c906108c | 1135 | |
c5aa993b | 1136 | SYNOPSIS |
c906108c | 1137 | |
c5aa993b | 1138 | static struct type *decode_array_element_type (char *scan, char *end) |
c906108c | 1139 | |
c5aa993b | 1140 | DESCRIPTION |
c906108c | 1141 | |
c5aa993b JM |
1142 | As the last step in decoding the array subscript information for an |
1143 | array DIE, we need to decode the type of the array elements. We are | |
1144 | passed a pointer to this last part of the subscript information and | |
1145 | must return the appropriate type. If the type attribute is not | |
1146 | recognized, just warn about the problem and return type int. | |
c906108c SS |
1147 | */ |
1148 | ||
1149 | static struct type * | |
fba45db2 | 1150 | decode_array_element_type (char *scan) |
c906108c SS |
1151 | { |
1152 | struct type *typep; | |
1153 | DIE_REF die_ref; | |
1154 | unsigned short attribute; | |
1155 | unsigned short fundtype; | |
1156 | int nbytes; | |
c5aa993b | 1157 | |
c906108c SS |
1158 | attribute = target_to_host (scan, SIZEOF_ATTRIBUTE, GET_UNSIGNED, |
1159 | current_objfile); | |
1160 | scan += SIZEOF_ATTRIBUTE; | |
b59661bd AC |
1161 | nbytes = attribute_size (attribute); |
1162 | if (nbytes == -1) | |
c906108c | 1163 | { |
23136709 | 1164 | bad_array_element_type_complaint (DIE_ID, DIE_NAME, attribute); |
c906108c SS |
1165 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1166 | } | |
1167 | else | |
1168 | { | |
1169 | switch (attribute) | |
1170 | { | |
c5aa993b JM |
1171 | case AT_fund_type: |
1172 | fundtype = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1173 | current_objfile); | |
1174 | typep = decode_fund_type (fundtype); | |
1175 | break; | |
1176 | case AT_mod_fund_type: | |
1177 | typep = decode_mod_fund_type (scan); | |
1178 | break; | |
1179 | case AT_user_def_type: | |
1180 | die_ref = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1181 | current_objfile); | |
b59661bd AC |
1182 | typep = lookup_utype (die_ref); |
1183 | if (typep == NULL) | |
c5aa993b JM |
1184 | { |
1185 | typep = alloc_utype (die_ref, NULL); | |
1186 | } | |
1187 | break; | |
1188 | case AT_mod_u_d_type: | |
1189 | typep = decode_mod_u_d_type (scan); | |
1190 | break; | |
1191 | default: | |
23136709 | 1192 | bad_array_element_type_complaint (DIE_ID, DIE_NAME, attribute); |
c5aa993b JM |
1193 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1194 | break; | |
1195 | } | |
c906108c SS |
1196 | } |
1197 | return (typep); | |
1198 | } | |
1199 | ||
1200 | /* | |
1201 | ||
c5aa993b | 1202 | LOCAL FUNCTION |
c906108c | 1203 | |
c5aa993b | 1204 | decode_subscript_data_item -- decode array subscript item |
c906108c | 1205 | |
c5aa993b | 1206 | SYNOPSIS |
c906108c | 1207 | |
c5aa993b JM |
1208 | static struct type * |
1209 | decode_subscript_data_item (char *scan, char *end) | |
c906108c | 1210 | |
c5aa993b | 1211 | DESCRIPTION |
c906108c | 1212 | |
c5aa993b JM |
1213 | The array subscripts and the data type of the elements of an |
1214 | array are described by a list of data items, stored as a block | |
1215 | of contiguous bytes. There is a data item describing each array | |
1216 | dimension, and a final data item describing the element type. | |
1217 | The data items are ordered the same as their appearance in the | |
1218 | source (I.E. leftmost dimension first, next to leftmost second, | |
1219 | etc). | |
c906108c | 1220 | |
c5aa993b JM |
1221 | The data items describing each array dimension consist of four |
1222 | parts: (1) a format specifier, (2) type type of the subscript | |
1223 | index, (3) a description of the low bound of the array dimension, | |
1224 | and (4) a description of the high bound of the array dimension. | |
c906108c | 1225 | |
c5aa993b JM |
1226 | The last data item is the description of the type of each of |
1227 | the array elements. | |
c906108c | 1228 | |
c5aa993b JM |
1229 | We are passed a pointer to the start of the block of bytes |
1230 | containing the remaining data items, and a pointer to the first | |
1231 | byte past the data. This function recursively decodes the | |
1232 | remaining data items and returns a type. | |
c906108c | 1233 | |
c5aa993b JM |
1234 | If we somehow fail to decode some data, we complain about it |
1235 | and return a type "array of int". | |
c906108c | 1236 | |
c5aa993b JM |
1237 | BUGS |
1238 | FIXME: This code only implements the forms currently used | |
1239 | by the AT&T and GNU C compilers. | |
c906108c | 1240 | |
c5aa993b JM |
1241 | The end pointer is supplied for error checking, maybe we should |
1242 | use it for that... | |
c906108c SS |
1243 | */ |
1244 | ||
1245 | static struct type * | |
fba45db2 | 1246 | decode_subscript_data_item (char *scan, char *end) |
c906108c SS |
1247 | { |
1248 | struct type *typep = NULL; /* Array type we are building */ | |
1249 | struct type *nexttype; /* Type of each element (may be array) */ | |
1250 | struct type *indextype; /* Type of this index */ | |
1251 | struct type *rangetype; | |
1252 | unsigned int format; | |
1253 | unsigned short fundtype; | |
1254 | unsigned long lowbound; | |
1255 | unsigned long highbound; | |
1256 | int nbytes; | |
c5aa993b | 1257 | |
c906108c SS |
1258 | format = target_to_host (scan, SIZEOF_FORMAT_SPECIFIER, GET_UNSIGNED, |
1259 | current_objfile); | |
1260 | scan += SIZEOF_FORMAT_SPECIFIER; | |
1261 | switch (format) | |
1262 | { | |
1263 | case FMT_ET: | |
1264 | typep = decode_array_element_type (scan); | |
1265 | break; | |
1266 | case FMT_FT_C_C: | |
1267 | fundtype = target_to_host (scan, SIZEOF_FMT_FT, GET_UNSIGNED, | |
1268 | current_objfile); | |
1269 | indextype = decode_fund_type (fundtype); | |
1270 | scan += SIZEOF_FMT_FT; | |
1271 | nbytes = TARGET_FT_LONG_SIZE (current_objfile); | |
1272 | lowbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1273 | scan += nbytes; | |
1274 | highbound = target_to_host (scan, nbytes, GET_UNSIGNED, current_objfile); | |
1275 | scan += nbytes; | |
1276 | nexttype = decode_subscript_data_item (scan, end); | |
1277 | if (nexttype == NULL) | |
1278 | { | |
1279 | /* Munged subscript data or other problem, fake it. */ | |
23136709 KB |
1280 | complaint (&symfile_complaints, |
1281 | "DIE @ 0x%x \"%s\", can't decode subscript data items", | |
1282 | DIE_ID, DIE_NAME); | |
c906108c SS |
1283 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1284 | } | |
1285 | rangetype = create_range_type ((struct type *) NULL, indextype, | |
c5aa993b | 1286 | lowbound, highbound); |
c906108c SS |
1287 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); |
1288 | break; | |
1289 | case FMT_FT_C_X: | |
1290 | case FMT_FT_X_C: | |
1291 | case FMT_FT_X_X: | |
1292 | case FMT_UT_C_C: | |
1293 | case FMT_UT_C_X: | |
1294 | case FMT_UT_X_C: | |
1295 | case FMT_UT_X_X: | |
23136709 KB |
1296 | complaint (&symfile_complaints, |
1297 | "DIE @ 0x%x \"%s\", array subscript format 0x%x not handled yet", | |
1298 | DIE_ID, DIE_NAME, format); | |
c906108c SS |
1299 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1300 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1301 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
1302 | break; | |
1303 | default: | |
23136709 KB |
1304 | complaint (&symfile_complaints, |
1305 | "DIE @ 0x%x \"%s\", unknown array subscript format %x", DIE_ID, | |
1306 | DIE_NAME, format); | |
c906108c SS |
1307 | nexttype = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1308 | rangetype = create_range_type ((struct type *) NULL, nexttype, 0, 0); | |
1309 | typep = create_array_type ((struct type *) NULL, nexttype, rangetype); | |
1310 | break; | |
1311 | } | |
1312 | return (typep); | |
1313 | } | |
1314 | ||
1315 | /* | |
1316 | ||
c5aa993b | 1317 | LOCAL FUNCTION |
c906108c | 1318 | |
c5aa993b | 1319 | dwarf_read_array_type -- read TAG_array_type DIE |
c906108c | 1320 | |
c5aa993b | 1321 | SYNOPSIS |
c906108c | 1322 | |
c5aa993b | 1323 | static void dwarf_read_array_type (struct dieinfo *dip) |
c906108c | 1324 | |
c5aa993b | 1325 | DESCRIPTION |
c906108c | 1326 | |
c5aa993b JM |
1327 | Extract all information from a TAG_array_type DIE and add to |
1328 | the user defined type vector. | |
c906108c SS |
1329 | */ |
1330 | ||
1331 | static void | |
fba45db2 | 1332 | dwarf_read_array_type (struct dieinfo *dip) |
c906108c SS |
1333 | { |
1334 | struct type *type; | |
1335 | struct type *utype; | |
1336 | char *sub; | |
1337 | char *subend; | |
1338 | unsigned short blocksz; | |
1339 | int nbytes; | |
c5aa993b JM |
1340 | |
1341 | if (dip->at_ordering != ORD_row_major) | |
c906108c SS |
1342 | { |
1343 | /* FIXME: Can gdb even handle column major arrays? */ | |
23136709 KB |
1344 | complaint (&symfile_complaints, |
1345 | "DIE @ 0x%x \"%s\", array not row major; not handled correctly", | |
1346 | DIE_ID, DIE_NAME); | |
c906108c | 1347 | } |
b59661bd AC |
1348 | sub = dip->at_subscr_data; |
1349 | if (sub != NULL) | |
c906108c SS |
1350 | { |
1351 | nbytes = attribute_size (AT_subscr_data); | |
1352 | blocksz = target_to_host (sub, nbytes, GET_UNSIGNED, current_objfile); | |
1353 | subend = sub + nbytes + blocksz; | |
1354 | sub += nbytes; | |
1355 | type = decode_subscript_data_item (sub, subend); | |
b59661bd AC |
1356 | utype = lookup_utype (dip->die_ref); |
1357 | if (utype == NULL) | |
c906108c SS |
1358 | { |
1359 | /* Install user defined type that has not been referenced yet. */ | |
c5aa993b | 1360 | alloc_utype (dip->die_ref, type); |
c906108c SS |
1361 | } |
1362 | else if (TYPE_CODE (utype) == TYPE_CODE_UNDEF) | |
1363 | { | |
1364 | /* Ick! A forward ref has already generated a blank type in our | |
1365 | slot, and this type probably already has things pointing to it | |
1366 | (which is what caused it to be created in the first place). | |
1367 | If it's just a place holder we can plop our fully defined type | |
1368 | on top of it. We can't recover the space allocated for our | |
1369 | new type since it might be on an obstack, but we could reuse | |
1370 | it if we kept a list of them, but it might not be worth it | |
1371 | (FIXME). */ | |
1372 | *utype = *type; | |
1373 | } | |
1374 | else | |
1375 | { | |
1376 | /* Double ick! Not only is a type already in our slot, but | |
1377 | someone has decorated it. Complain and leave it alone. */ | |
23136709 | 1378 | dup_user_type_definition_complaint (DIE_ID, DIE_NAME); |
c906108c SS |
1379 | } |
1380 | } | |
1381 | } | |
1382 | ||
1383 | /* | |
1384 | ||
c5aa993b | 1385 | LOCAL FUNCTION |
c906108c | 1386 | |
c5aa993b | 1387 | read_tag_pointer_type -- read TAG_pointer_type DIE |
c906108c | 1388 | |
c5aa993b | 1389 | SYNOPSIS |
c906108c | 1390 | |
c5aa993b | 1391 | static void read_tag_pointer_type (struct dieinfo *dip) |
c906108c | 1392 | |
c5aa993b | 1393 | DESCRIPTION |
c906108c | 1394 | |
c5aa993b JM |
1395 | Extract all information from a TAG_pointer_type DIE and add to |
1396 | the user defined type vector. | |
c906108c SS |
1397 | */ |
1398 | ||
1399 | static void | |
fba45db2 | 1400 | read_tag_pointer_type (struct dieinfo *dip) |
c906108c SS |
1401 | { |
1402 | struct type *type; | |
1403 | struct type *utype; | |
c5aa993b | 1404 | |
c906108c | 1405 | type = decode_die_type (dip); |
b59661bd AC |
1406 | utype = lookup_utype (dip->die_ref); |
1407 | if (utype == NULL) | |
c906108c SS |
1408 | { |
1409 | utype = lookup_pointer_type (type); | |
c5aa993b | 1410 | alloc_utype (dip->die_ref, utype); |
c906108c SS |
1411 | } |
1412 | else | |
1413 | { | |
1414 | TYPE_TARGET_TYPE (utype) = type; | |
1415 | TYPE_POINTER_TYPE (type) = utype; | |
1416 | ||
1417 | /* We assume the machine has only one representation for pointers! */ | |
1418 | /* FIXME: Possably a poor assumption */ | |
c5aa993b | 1419 | TYPE_LENGTH (utype) = TARGET_PTR_BIT / TARGET_CHAR_BIT; |
c906108c SS |
1420 | TYPE_CODE (utype) = TYPE_CODE_PTR; |
1421 | } | |
1422 | } | |
1423 | ||
1424 | /* | |
1425 | ||
c5aa993b | 1426 | LOCAL FUNCTION |
c906108c | 1427 | |
c5aa993b | 1428 | read_tag_string_type -- read TAG_string_type DIE |
c906108c | 1429 | |
c5aa993b | 1430 | SYNOPSIS |
c906108c | 1431 | |
c5aa993b | 1432 | static void read_tag_string_type (struct dieinfo *dip) |
c906108c | 1433 | |
c5aa993b | 1434 | DESCRIPTION |
c906108c | 1435 | |
c5aa993b JM |
1436 | Extract all information from a TAG_string_type DIE and add to |
1437 | the user defined type vector. It isn't really a user defined | |
1438 | type, but it behaves like one, with other DIE's using an | |
1439 | AT_user_def_type attribute to reference it. | |
c906108c SS |
1440 | */ |
1441 | ||
1442 | static void | |
fba45db2 | 1443 | read_tag_string_type (struct dieinfo *dip) |
c906108c SS |
1444 | { |
1445 | struct type *utype; | |
1446 | struct type *indextype; | |
1447 | struct type *rangetype; | |
1448 | unsigned long lowbound = 0; | |
1449 | unsigned long highbound; | |
1450 | ||
c5aa993b | 1451 | if (dip->has_at_byte_size) |
c906108c SS |
1452 | { |
1453 | /* A fixed bounds string */ | |
c5aa993b | 1454 | highbound = dip->at_byte_size - 1; |
c906108c SS |
1455 | } |
1456 | else | |
1457 | { | |
1458 | /* A varying length string. Stub for now. (FIXME) */ | |
1459 | highbound = 1; | |
1460 | } | |
1461 | indextype = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
1462 | rangetype = create_range_type ((struct type *) NULL, indextype, lowbound, | |
1463 | highbound); | |
c5aa993b JM |
1464 | |
1465 | utype = lookup_utype (dip->die_ref); | |
c906108c SS |
1466 | if (utype == NULL) |
1467 | { | |
1468 | /* No type defined, go ahead and create a blank one to use. */ | |
c5aa993b | 1469 | utype = alloc_utype (dip->die_ref, (struct type *) NULL); |
c906108c SS |
1470 | } |
1471 | else | |
1472 | { | |
1473 | /* Already a type in our slot due to a forward reference. Make sure it | |
c5aa993b | 1474 | is a blank one. If not, complain and leave it alone. */ |
c906108c SS |
1475 | if (TYPE_CODE (utype) != TYPE_CODE_UNDEF) |
1476 | { | |
23136709 | 1477 | dup_user_type_definition_complaint (DIE_ID, DIE_NAME); |
c906108c SS |
1478 | return; |
1479 | } | |
1480 | } | |
1481 | ||
1482 | /* Create the string type using the blank type we either found or created. */ | |
1483 | utype = create_string_type (utype, rangetype); | |
1484 | } | |
1485 | ||
1486 | /* | |
1487 | ||
c5aa993b | 1488 | LOCAL FUNCTION |
c906108c | 1489 | |
c5aa993b | 1490 | read_subroutine_type -- process TAG_subroutine_type dies |
c906108c | 1491 | |
c5aa993b | 1492 | SYNOPSIS |
c906108c | 1493 | |
c5aa993b JM |
1494 | static void read_subroutine_type (struct dieinfo *dip, char thisdie, |
1495 | char *enddie) | |
c906108c | 1496 | |
c5aa993b | 1497 | DESCRIPTION |
c906108c | 1498 | |
c5aa993b | 1499 | Handle DIES due to C code like: |
c906108c | 1500 | |
c5aa993b JM |
1501 | struct foo { |
1502 | int (*funcp)(int a, long l); (Generates TAG_subroutine_type DIE) | |
1503 | int b; | |
1504 | }; | |
c906108c | 1505 | |
c5aa993b | 1506 | NOTES |
c906108c | 1507 | |
c5aa993b JM |
1508 | The parameter DIES are currently ignored. See if gdb has a way to |
1509 | include this info in it's type system, and decode them if so. Is | |
1510 | this what the type structure's "arg_types" field is for? (FIXME) | |
c906108c SS |
1511 | */ |
1512 | ||
1513 | static void | |
fba45db2 | 1514 | read_subroutine_type (struct dieinfo *dip, char *thisdie, char *enddie) |
c906108c SS |
1515 | { |
1516 | struct type *type; /* Type that this function returns */ | |
1517 | struct type *ftype; /* Function that returns above type */ | |
c5aa993b | 1518 | |
c906108c SS |
1519 | /* Decode the type that this subroutine returns */ |
1520 | ||
1521 | type = decode_die_type (dip); | |
1522 | ||
1523 | /* Check to see if we already have a partially constructed user | |
1524 | defined type for this DIE, from a forward reference. */ | |
1525 | ||
b59661bd AC |
1526 | ftype = lookup_utype (dip->die_ref); |
1527 | if (ftype == NULL) | |
c906108c SS |
1528 | { |
1529 | /* This is the first reference to one of these types. Make | |
c5aa993b | 1530 | a new one and place it in the user defined types. */ |
c906108c | 1531 | ftype = lookup_function_type (type); |
c5aa993b | 1532 | alloc_utype (dip->die_ref, ftype); |
c906108c SS |
1533 | } |
1534 | else if (TYPE_CODE (ftype) == TYPE_CODE_UNDEF) | |
1535 | { | |
1536 | /* We have an existing partially constructed type, so bash it | |
c5aa993b | 1537 | into the correct type. */ |
c906108c SS |
1538 | TYPE_TARGET_TYPE (ftype) = type; |
1539 | TYPE_LENGTH (ftype) = 1; | |
1540 | TYPE_CODE (ftype) = TYPE_CODE_FUNC; | |
1541 | } | |
1542 | else | |
1543 | { | |
23136709 | 1544 | dup_user_type_definition_complaint (DIE_ID, DIE_NAME); |
c906108c SS |
1545 | } |
1546 | } | |
1547 | ||
1548 | /* | |
1549 | ||
c5aa993b | 1550 | LOCAL FUNCTION |
c906108c | 1551 | |
c5aa993b | 1552 | read_enumeration -- process dies which define an enumeration |
c906108c | 1553 | |
c5aa993b | 1554 | SYNOPSIS |
c906108c | 1555 | |
c5aa993b JM |
1556 | static void read_enumeration (struct dieinfo *dip, char *thisdie, |
1557 | char *enddie, struct objfile *objfile) | |
c906108c | 1558 | |
c5aa993b | 1559 | DESCRIPTION |
c906108c | 1560 | |
c5aa993b JM |
1561 | Given a pointer to a die which begins an enumeration, process all |
1562 | the dies that define the members of the enumeration. | |
c906108c | 1563 | |
c5aa993b | 1564 | NOTES |
c906108c | 1565 | |
c5aa993b JM |
1566 | Note that we need to call enum_type regardless of whether or not we |
1567 | have a symbol, since we might have an enum without a tag name (thus | |
1568 | no symbol for the tagname). | |
c906108c SS |
1569 | */ |
1570 | ||
1571 | static void | |
fba45db2 KB |
1572 | read_enumeration (struct dieinfo *dip, char *thisdie, char *enddie, |
1573 | struct objfile *objfile) | |
c906108c SS |
1574 | { |
1575 | struct type *type; | |
1576 | struct symbol *sym; | |
c5aa993b | 1577 | |
c906108c SS |
1578 | type = enum_type (dip, objfile); |
1579 | sym = new_symbol (dip, objfile); | |
1580 | if (sym != NULL) | |
1581 | { | |
1582 | SYMBOL_TYPE (sym) = type; | |
1583 | if (cu_language == language_cplus) | |
1584 | { | |
1585 | synthesize_typedef (dip, objfile, type); | |
1586 | } | |
1587 | } | |
1588 | } | |
1589 | ||
1590 | /* | |
1591 | ||
c5aa993b | 1592 | LOCAL FUNCTION |
c906108c | 1593 | |
c5aa993b | 1594 | enum_type -- decode and return a type for an enumeration |
c906108c | 1595 | |
c5aa993b | 1596 | SYNOPSIS |
c906108c | 1597 | |
c5aa993b | 1598 | static type *enum_type (struct dieinfo *dip, struct objfile *objfile) |
c906108c | 1599 | |
c5aa993b | 1600 | DESCRIPTION |
c906108c | 1601 | |
c5aa993b JM |
1602 | Given a pointer to a die information structure for the die which |
1603 | starts an enumeration, process all the dies that define the members | |
1604 | of the enumeration and return a type pointer for the enumeration. | |
c906108c | 1605 | |
c5aa993b | 1606 | At the same time, for each member of the enumeration, create a |
176620f1 | 1607 | symbol for it with domain VAR_DOMAIN and class LOC_CONST, |
c5aa993b | 1608 | and give it the type of the enumeration itself. |
c906108c | 1609 | |
c5aa993b | 1610 | NOTES |
c906108c | 1611 | |
c5aa993b JM |
1612 | Note that the DWARF specification explicitly mandates that enum |
1613 | constants occur in reverse order from the source program order, | |
1614 | for "consistency" and because this ordering is easier for many | |
1615 | compilers to generate. (Draft 6, sec 3.8.5, Enumeration type | |
1616 | Entries). Because gdb wants to see the enum members in program | |
1617 | source order, we have to ensure that the order gets reversed while | |
1618 | we are processing them. | |
c906108c SS |
1619 | */ |
1620 | ||
1621 | static struct type * | |
fba45db2 | 1622 | enum_type (struct dieinfo *dip, struct objfile *objfile) |
c906108c SS |
1623 | { |
1624 | struct type *type; | |
c5aa993b JM |
1625 | struct nextfield |
1626 | { | |
1627 | struct nextfield *next; | |
1628 | struct field field; | |
1629 | }; | |
c906108c SS |
1630 | struct nextfield *list = NULL; |
1631 | struct nextfield *new; | |
1632 | int nfields = 0; | |
1633 | int n; | |
1634 | char *scan; | |
1635 | char *listend; | |
1636 | unsigned short blocksz; | |
1637 | struct symbol *sym; | |
1638 | int nbytes; | |
1639 | int unsigned_enum = 1; | |
c5aa993b | 1640 | |
b59661bd AC |
1641 | type = lookup_utype (dip->die_ref); |
1642 | if (type == NULL) | |
c906108c SS |
1643 | { |
1644 | /* No forward references created an empty type, so install one now */ | |
c5aa993b | 1645 | type = alloc_utype (dip->die_ref, NULL); |
c906108c SS |
1646 | } |
1647 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
1648 | /* Some compilers try to be helpful by inventing "fake" names for | |
1649 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1650 | Thanks, but no thanks... */ | |
c5aa993b JM |
1651 | if (dip->at_name != NULL |
1652 | && *dip->at_name != '~' | |
1653 | && *dip->at_name != '.') | |
c906108c | 1654 | { |
c5aa993b JM |
1655 | TYPE_TAG_NAME (type) = obconcat (&objfile->type_obstack, |
1656 | "", "", dip->at_name); | |
c906108c | 1657 | } |
c5aa993b | 1658 | if (dip->at_byte_size != 0) |
c906108c | 1659 | { |
c5aa993b | 1660 | TYPE_LENGTH (type) = dip->at_byte_size; |
c906108c | 1661 | } |
b59661bd AC |
1662 | scan = dip->at_element_list; |
1663 | if (scan != NULL) | |
c906108c | 1664 | { |
c5aa993b | 1665 | if (dip->short_element_list) |
c906108c SS |
1666 | { |
1667 | nbytes = attribute_size (AT_short_element_list); | |
1668 | } | |
1669 | else | |
1670 | { | |
1671 | nbytes = attribute_size (AT_element_list); | |
1672 | } | |
1673 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); | |
1674 | listend = scan + nbytes + blocksz; | |
1675 | scan += nbytes; | |
1676 | while (scan < listend) | |
1677 | { | |
1678 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
c5aa993b | 1679 | new->next = list; |
c906108c SS |
1680 | list = new; |
1681 | FIELD_TYPE (list->field) = NULL; | |
1682 | FIELD_BITSIZE (list->field) = 0; | |
01ad7f36 | 1683 | FIELD_STATIC_KIND (list->field) = 0; |
c906108c SS |
1684 | FIELD_BITPOS (list->field) = |
1685 | target_to_host (scan, TARGET_FT_LONG_SIZE (objfile), GET_SIGNED, | |
1686 | objfile); | |
1687 | scan += TARGET_FT_LONG_SIZE (objfile); | |
c5aa993b JM |
1688 | list->field.name = obsavestring (scan, strlen (scan), |
1689 | &objfile->type_obstack); | |
c906108c SS |
1690 | scan += strlen (scan) + 1; |
1691 | nfields++; | |
1692 | /* Handcraft a new symbol for this enum member. */ | |
1693 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, | |
1694 | sizeof (struct symbol)); | |
1695 | memset (sym, 0, sizeof (struct symbol)); | |
22abf04a | 1696 | DEPRECATED_SYMBOL_NAME (sym) = create_name (list->field.name, |
c906108c SS |
1697 | &objfile->symbol_obstack); |
1698 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); | |
176620f1 | 1699 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
c906108c SS |
1700 | SYMBOL_CLASS (sym) = LOC_CONST; |
1701 | SYMBOL_TYPE (sym) = type; | |
1702 | SYMBOL_VALUE (sym) = FIELD_BITPOS (list->field); | |
1703 | if (SYMBOL_VALUE (sym) < 0) | |
1704 | unsigned_enum = 0; | |
1705 | add_symbol_to_list (sym, list_in_scope); | |
1706 | } | |
1707 | /* Now create the vector of fields, and record how big it is. This is | |
c5aa993b JM |
1708 | where we reverse the order, by pulling the members off the list in |
1709 | reverse order from how they were inserted. If we have no fields | |
1710 | (this is apparently possible in C++) then skip building a field | |
1711 | vector. */ | |
c906108c SS |
1712 | if (nfields > 0) |
1713 | { | |
1714 | if (unsigned_enum) | |
1715 | TYPE_FLAGS (type) |= TYPE_FLAG_UNSIGNED; | |
1716 | TYPE_NFIELDS (type) = nfields; | |
1717 | TYPE_FIELDS (type) = (struct field *) | |
1718 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct field) * nfields); | |
1719 | /* Copy the saved-up fields into the field vector. */ | |
c5aa993b | 1720 | for (n = 0; (n < nfields) && (list != NULL); list = list->next) |
c906108c | 1721 | { |
c5aa993b JM |
1722 | TYPE_FIELD (type, n++) = list->field; |
1723 | } | |
c906108c SS |
1724 | } |
1725 | } | |
1726 | return (type); | |
1727 | } | |
1728 | ||
1729 | /* | |
1730 | ||
c5aa993b | 1731 | LOCAL FUNCTION |
c906108c | 1732 | |
c5aa993b | 1733 | read_func_scope -- process all dies within a function scope |
c906108c | 1734 | |
c5aa993b | 1735 | DESCRIPTION |
c906108c | 1736 | |
c5aa993b JM |
1737 | Process all dies within a given function scope. We are passed |
1738 | a die information structure pointer DIP for the die which | |
1739 | starts the function scope, and pointers into the raw die data | |
1740 | that define the dies within the function scope. | |
1741 | ||
1742 | For now, we ignore lexical block scopes within the function. | |
1743 | The problem is that AT&T cc does not define a DWARF lexical | |
1744 | block scope for the function itself, while gcc defines a | |
1745 | lexical block scope for the function. We need to think about | |
1746 | how to handle this difference, or if it is even a problem. | |
1747 | (FIXME) | |
c906108c SS |
1748 | */ |
1749 | ||
1750 | static void | |
fba45db2 KB |
1751 | read_func_scope (struct dieinfo *dip, char *thisdie, char *enddie, |
1752 | struct objfile *objfile) | |
c906108c | 1753 | { |
b59661bd | 1754 | struct context_stack *new; |
c5aa993b | 1755 | |
c906108c SS |
1756 | /* AT_name is absent if the function is described with an |
1757 | AT_abstract_origin tag. | |
1758 | Ignore the function description for now to avoid GDB core dumps. | |
1759 | FIXME: Add code to handle AT_abstract_origin tags properly. */ | |
c5aa993b | 1760 | if (dip->at_name == NULL) |
c906108c | 1761 | { |
23136709 KB |
1762 | complaint (&symfile_complaints, "DIE @ 0x%x, AT_name tag missing", |
1763 | DIE_ID); | |
c906108c SS |
1764 | return; |
1765 | } | |
1766 | ||
c5aa993b JM |
1767 | if (objfile->ei.entry_point >= dip->at_low_pc && |
1768 | objfile->ei.entry_point < dip->at_high_pc) | |
c906108c | 1769 | { |
c5aa993b JM |
1770 | objfile->ei.entry_func_lowpc = dip->at_low_pc; |
1771 | objfile->ei.entry_func_highpc = dip->at_high_pc; | |
c906108c | 1772 | } |
c5aa993b JM |
1773 | new = push_context (0, dip->at_low_pc); |
1774 | new->name = new_symbol (dip, objfile); | |
c906108c | 1775 | list_in_scope = &local_symbols; |
c5aa993b | 1776 | process_dies (thisdie + dip->die_length, enddie, objfile); |
c906108c SS |
1777 | new = pop_context (); |
1778 | /* Make a block for the local symbols within. */ | |
c5aa993b JM |
1779 | finish_block (new->name, &local_symbols, new->old_blocks, |
1780 | new->start_addr, dip->at_high_pc, objfile); | |
c906108c SS |
1781 | list_in_scope = &file_symbols; |
1782 | } | |
1783 | ||
1784 | ||
1785 | /* | |
1786 | ||
c5aa993b | 1787 | LOCAL FUNCTION |
c906108c | 1788 | |
c5aa993b | 1789 | handle_producer -- process the AT_producer attribute |
c906108c | 1790 | |
c5aa993b | 1791 | DESCRIPTION |
c906108c | 1792 | |
c5aa993b JM |
1793 | Perform any operations that depend on finding a particular |
1794 | AT_producer attribute. | |
c906108c SS |
1795 | |
1796 | */ | |
1797 | ||
1798 | static void | |
fba45db2 | 1799 | handle_producer (char *producer) |
c906108c SS |
1800 | { |
1801 | ||
1802 | /* If this compilation unit was compiled with g++ or gcc, then set the | |
1803 | processing_gcc_compilation flag. */ | |
1804 | ||
1805 | if (STREQN (producer, GCC_PRODUCER, strlen (GCC_PRODUCER))) | |
1806 | { | |
1807 | char version = producer[strlen (GCC_PRODUCER)]; | |
1808 | processing_gcc_compilation = (version == '2' ? 2 : 1); | |
1809 | } | |
1810 | else | |
1811 | { | |
1812 | processing_gcc_compilation = | |
db034ac5 | 1813 | STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER)); |
c906108c SS |
1814 | } |
1815 | ||
1816 | /* Select a demangling style if we can identify the producer and if | |
1817 | the current style is auto. We leave the current style alone if it | |
1818 | is not auto. We also leave the demangling style alone if we find a | |
1819 | gcc (cc1) producer, as opposed to a g++ (cc1plus) producer. */ | |
1820 | ||
1821 | if (AUTO_DEMANGLING) | |
1822 | { | |
1823 | if (STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER))) | |
1824 | { | |
8052a17a JM |
1825 | #if 0 |
1826 | /* For now, stay with AUTO_DEMANGLING for g++ output, as we don't | |
1827 | know whether it will use the old style or v3 mangling. */ | |
c906108c | 1828 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); |
8052a17a | 1829 | #endif |
c906108c SS |
1830 | } |
1831 | else if (STREQN (producer, LCC_PRODUCER, strlen (LCC_PRODUCER))) | |
1832 | { | |
1833 | set_demangling_style (LUCID_DEMANGLING_STYLE_STRING); | |
1834 | } | |
1835 | } | |
1836 | } | |
1837 | ||
1838 | ||
1839 | /* | |
1840 | ||
c5aa993b | 1841 | LOCAL FUNCTION |
c906108c | 1842 | |
c5aa993b | 1843 | read_file_scope -- process all dies within a file scope |
c906108c | 1844 | |
c5aa993b JM |
1845 | DESCRIPTION |
1846 | ||
1847 | Process all dies within a given file scope. We are passed a | |
1848 | pointer to the die information structure for the die which | |
1849 | starts the file scope, and pointers into the raw die data which | |
1850 | mark the range of dies within the file scope. | |
c906108c | 1851 | |
c5aa993b JM |
1852 | When the partial symbol table is built, the file offset for the line |
1853 | number table for each compilation unit is saved in the partial symbol | |
1854 | table entry for that compilation unit. As the symbols for each | |
1855 | compilation unit are read, the line number table is read into memory | |
1856 | and the variable lnbase is set to point to it. Thus all we have to | |
1857 | do is use lnbase to access the line number table for the current | |
1858 | compilation unit. | |
c906108c SS |
1859 | */ |
1860 | ||
1861 | static void | |
fba45db2 KB |
1862 | read_file_scope (struct dieinfo *dip, char *thisdie, char *enddie, |
1863 | struct objfile *objfile) | |
c906108c SS |
1864 | { |
1865 | struct cleanup *back_to; | |
1866 | struct symtab *symtab; | |
c5aa993b JM |
1867 | |
1868 | if (objfile->ei.entry_point >= dip->at_low_pc && | |
1869 | objfile->ei.entry_point < dip->at_high_pc) | |
c906108c | 1870 | { |
627b3ba2 AC |
1871 | objfile->ei.deprecated_entry_file_lowpc = dip->at_low_pc; |
1872 | objfile->ei.deprecated_entry_file_highpc = dip->at_high_pc; | |
c906108c SS |
1873 | } |
1874 | set_cu_language (dip); | |
c5aa993b | 1875 | if (dip->at_producer != NULL) |
c906108c | 1876 | { |
c5aa993b | 1877 | handle_producer (dip->at_producer); |
c906108c SS |
1878 | } |
1879 | numutypes = (enddie - thisdie) / 4; | |
1880 | utypes = (struct type **) xmalloc (numutypes * sizeof (struct type *)); | |
1881 | back_to = make_cleanup (free_utypes, NULL); | |
1882 | memset (utypes, 0, numutypes * sizeof (struct type *)); | |
1883 | memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *)); | |
c5aa993b | 1884 | start_symtab (dip->at_name, dip->at_comp_dir, dip->at_low_pc); |
c906108c SS |
1885 | record_debugformat ("DWARF 1"); |
1886 | decode_line_numbers (lnbase); | |
c5aa993b | 1887 | process_dies (thisdie + dip->die_length, enddie, objfile); |
c906108c | 1888 | |
c5aa993b | 1889 | symtab = end_symtab (dip->at_high_pc, objfile, 0); |
c906108c SS |
1890 | if (symtab != NULL) |
1891 | { | |
c5aa993b JM |
1892 | symtab->language = cu_language; |
1893 | } | |
c906108c SS |
1894 | do_cleanups (back_to); |
1895 | } | |
1896 | ||
1897 | /* | |
1898 | ||
c5aa993b | 1899 | LOCAL FUNCTION |
c906108c | 1900 | |
c5aa993b | 1901 | process_dies -- process a range of DWARF Information Entries |
c906108c | 1902 | |
c5aa993b | 1903 | SYNOPSIS |
c906108c | 1904 | |
c5aa993b JM |
1905 | static void process_dies (char *thisdie, char *enddie, |
1906 | struct objfile *objfile) | |
c906108c | 1907 | |
c5aa993b | 1908 | DESCRIPTION |
c906108c | 1909 | |
c5aa993b JM |
1910 | Process all DIE's in a specified range. May be (and almost |
1911 | certainly will be) called recursively. | |
c906108c SS |
1912 | */ |
1913 | ||
1914 | static void | |
fba45db2 | 1915 | process_dies (char *thisdie, char *enddie, struct objfile *objfile) |
c906108c SS |
1916 | { |
1917 | char *nextdie; | |
1918 | struct dieinfo di; | |
c5aa993b | 1919 | |
c906108c SS |
1920 | while (thisdie < enddie) |
1921 | { | |
1922 | basicdieinfo (&di, thisdie, objfile); | |
1923 | if (di.die_length < SIZEOF_DIE_LENGTH) | |
1924 | { | |
1925 | break; | |
1926 | } | |
1927 | else if (di.die_tag == TAG_padding) | |
1928 | { | |
1929 | nextdie = thisdie + di.die_length; | |
1930 | } | |
1931 | else | |
1932 | { | |
1933 | completedieinfo (&di, objfile); | |
1934 | if (di.at_sibling != 0) | |
1935 | { | |
1936 | nextdie = dbbase + di.at_sibling - dbroff; | |
1937 | } | |
1938 | else | |
1939 | { | |
1940 | nextdie = thisdie + di.die_length; | |
1941 | } | |
c906108c | 1942 | /* I think that these are always text, not data, addresses. */ |
181c1381 RE |
1943 | di.at_low_pc = SMASH_TEXT_ADDRESS (di.at_low_pc); |
1944 | di.at_high_pc = SMASH_TEXT_ADDRESS (di.at_high_pc); | |
c906108c SS |
1945 | switch (di.die_tag) |
1946 | { | |
1947 | case TAG_compile_unit: | |
1948 | /* Skip Tag_compile_unit if we are already inside a compilation | |
c5aa993b JM |
1949 | unit, we are unable to handle nested compilation units |
1950 | properly (FIXME). */ | |
c906108c SS |
1951 | if (current_subfile == NULL) |
1952 | read_file_scope (&di, thisdie, nextdie, objfile); | |
1953 | else | |
1954 | nextdie = thisdie + di.die_length; | |
1955 | break; | |
1956 | case TAG_global_subroutine: | |
1957 | case TAG_subroutine: | |
1958 | if (di.has_at_low_pc) | |
1959 | { | |
1960 | read_func_scope (&di, thisdie, nextdie, objfile); | |
1961 | } | |
1962 | break; | |
1963 | case TAG_lexical_block: | |
1964 | read_lexical_block_scope (&di, thisdie, nextdie, objfile); | |
1965 | break; | |
1966 | case TAG_class_type: | |
1967 | case TAG_structure_type: | |
1968 | case TAG_union_type: | |
1969 | read_structure_scope (&di, thisdie, nextdie, objfile); | |
1970 | break; | |
1971 | case TAG_enumeration_type: | |
1972 | read_enumeration (&di, thisdie, nextdie, objfile); | |
1973 | break; | |
1974 | case TAG_subroutine_type: | |
1975 | read_subroutine_type (&di, thisdie, nextdie); | |
1976 | break; | |
1977 | case TAG_array_type: | |
1978 | dwarf_read_array_type (&di); | |
1979 | break; | |
1980 | case TAG_pointer_type: | |
1981 | read_tag_pointer_type (&di); | |
1982 | break; | |
1983 | case TAG_string_type: | |
1984 | read_tag_string_type (&di); | |
1985 | break; | |
1986 | default: | |
1987 | new_symbol (&di, objfile); | |
1988 | break; | |
1989 | } | |
1990 | } | |
1991 | thisdie = nextdie; | |
1992 | } | |
1993 | } | |
1994 | ||
1995 | /* | |
1996 | ||
c5aa993b | 1997 | LOCAL FUNCTION |
c906108c | 1998 | |
c5aa993b | 1999 | decode_line_numbers -- decode a line number table fragment |
c906108c | 2000 | |
c5aa993b | 2001 | SYNOPSIS |
c906108c | 2002 | |
c5aa993b JM |
2003 | static void decode_line_numbers (char *tblscan, char *tblend, |
2004 | long length, long base, long line, long pc) | |
c906108c | 2005 | |
c5aa993b | 2006 | DESCRIPTION |
c906108c | 2007 | |
c5aa993b | 2008 | Translate the DWARF line number information to gdb form. |
c906108c | 2009 | |
c5aa993b JM |
2010 | The ".line" section contains one or more line number tables, one for |
2011 | each ".line" section from the objects that were linked. | |
c906108c | 2012 | |
c5aa993b JM |
2013 | The AT_stmt_list attribute for each TAG_source_file entry in the |
2014 | ".debug" section contains the offset into the ".line" section for the | |
2015 | start of the table for that file. | |
c906108c | 2016 | |
c5aa993b | 2017 | The table itself has the following structure: |
c906108c | 2018 | |
c5aa993b JM |
2019 | <table length><base address><source statement entry> |
2020 | 4 bytes 4 bytes 10 bytes | |
c906108c | 2021 | |
c5aa993b JM |
2022 | The table length is the total size of the table, including the 4 bytes |
2023 | for the length information. | |
c906108c | 2024 | |
c5aa993b JM |
2025 | The base address is the address of the first instruction generated |
2026 | for the source file. | |
c906108c | 2027 | |
c5aa993b | 2028 | Each source statement entry has the following structure: |
c906108c | 2029 | |
c5aa993b JM |
2030 | <line number><statement position><address delta> |
2031 | 4 bytes 2 bytes 4 bytes | |
c906108c | 2032 | |
c5aa993b JM |
2033 | The line number is relative to the start of the file, starting with |
2034 | line 1. | |
c906108c | 2035 | |
c5aa993b JM |
2036 | The statement position either -1 (0xFFFF) or the number of characters |
2037 | from the beginning of the line to the beginning of the statement. | |
c906108c | 2038 | |
c5aa993b JM |
2039 | The address delta is the difference between the base address and |
2040 | the address of the first instruction for the statement. | |
c906108c | 2041 | |
c5aa993b JM |
2042 | Note that we must copy the bytes from the packed table to our local |
2043 | variables before attempting to use them, to avoid alignment problems | |
2044 | on some machines, particularly RISC processors. | |
c906108c | 2045 | |
c5aa993b | 2046 | BUGS |
c906108c | 2047 | |
c5aa993b JM |
2048 | Does gdb expect the line numbers to be sorted? They are now by |
2049 | chance/luck, but are not required to be. (FIXME) | |
c906108c | 2050 | |
c5aa993b JM |
2051 | The line with number 0 is unused, gdb apparently can discover the |
2052 | span of the last line some other way. How? (FIXME) | |
c906108c SS |
2053 | */ |
2054 | ||
2055 | static void | |
fba45db2 | 2056 | decode_line_numbers (char *linetable) |
c906108c SS |
2057 | { |
2058 | char *tblscan; | |
2059 | char *tblend; | |
2060 | unsigned long length; | |
2061 | unsigned long base; | |
2062 | unsigned long line; | |
2063 | unsigned long pc; | |
c5aa993b | 2064 | |
c906108c SS |
2065 | if (linetable != NULL) |
2066 | { | |
2067 | tblscan = tblend = linetable; | |
2068 | length = target_to_host (tblscan, SIZEOF_LINETBL_LENGTH, GET_UNSIGNED, | |
2069 | current_objfile); | |
2070 | tblscan += SIZEOF_LINETBL_LENGTH; | |
2071 | tblend += length; | |
2072 | base = target_to_host (tblscan, TARGET_FT_POINTER_SIZE (objfile), | |
2073 | GET_UNSIGNED, current_objfile); | |
2074 | tblscan += TARGET_FT_POINTER_SIZE (objfile); | |
2075 | base += baseaddr; | |
2076 | while (tblscan < tblend) | |
2077 | { | |
2078 | line = target_to_host (tblscan, SIZEOF_LINETBL_LINENO, GET_UNSIGNED, | |
2079 | current_objfile); | |
2080 | tblscan += SIZEOF_LINETBL_LINENO + SIZEOF_LINETBL_STMT; | |
2081 | pc = target_to_host (tblscan, SIZEOF_LINETBL_DELTA, GET_UNSIGNED, | |
2082 | current_objfile); | |
2083 | tblscan += SIZEOF_LINETBL_DELTA; | |
2084 | pc += base; | |
2085 | if (line != 0) | |
2086 | { | |
2087 | record_line (current_subfile, line, pc); | |
2088 | } | |
2089 | } | |
2090 | } | |
2091 | } | |
2092 | ||
2093 | /* | |
2094 | ||
c5aa993b | 2095 | LOCAL FUNCTION |
c906108c | 2096 | |
c5aa993b | 2097 | locval -- compute the value of a location attribute |
c906108c | 2098 | |
c5aa993b | 2099 | SYNOPSIS |
c906108c | 2100 | |
c5aa993b | 2101 | static int locval (struct dieinfo *dip) |
c906108c | 2102 | |
c5aa993b | 2103 | DESCRIPTION |
c906108c | 2104 | |
c5aa993b JM |
2105 | Given pointer to a string of bytes that define a location, compute |
2106 | the location and return the value. | |
2107 | A location description containing no atoms indicates that the | |
2108 | object is optimized out. The optimized_out flag is set for those, | |
2109 | the return value is meaningless. | |
c906108c | 2110 | |
c5aa993b JM |
2111 | When computing values involving the current value of the frame pointer, |
2112 | the value zero is used, which results in a value relative to the frame | |
2113 | pointer, rather than the absolute value. This is what GDB wants | |
2114 | anyway. | |
c906108c | 2115 | |
c5aa993b JM |
2116 | When the result is a register number, the isreg flag is set, otherwise |
2117 | it is cleared. This is a kludge until we figure out a better | |
2118 | way to handle the problem. Gdb's design does not mesh well with the | |
2119 | DWARF notion of a location computing interpreter, which is a shame | |
2120 | because the flexibility goes unused. | |
2121 | ||
2122 | NOTES | |
2123 | ||
2124 | Note that stack[0] is unused except as a default error return. | |
2125 | Note that stack overflow is not yet handled. | |
c906108c SS |
2126 | */ |
2127 | ||
2128 | static int | |
fba45db2 | 2129 | locval (struct dieinfo *dip) |
c906108c SS |
2130 | { |
2131 | unsigned short nbytes; | |
2132 | unsigned short locsize; | |
2133 | auto long stack[64]; | |
2134 | int stacki; | |
2135 | char *loc; | |
2136 | char *end; | |
2137 | int loc_atom_code; | |
2138 | int loc_value_size; | |
c5aa993b JM |
2139 | |
2140 | loc = dip->at_location; | |
c906108c SS |
2141 | nbytes = attribute_size (AT_location); |
2142 | locsize = target_to_host (loc, nbytes, GET_UNSIGNED, current_objfile); | |
2143 | loc += nbytes; | |
2144 | end = loc + locsize; | |
2145 | stacki = 0; | |
2146 | stack[stacki] = 0; | |
c5aa993b JM |
2147 | dip->isreg = 0; |
2148 | dip->offreg = 0; | |
2149 | dip->optimized_out = 1; | |
c906108c SS |
2150 | loc_value_size = TARGET_FT_LONG_SIZE (current_objfile); |
2151 | while (loc < end) | |
2152 | { | |
c5aa993b | 2153 | dip->optimized_out = 0; |
c906108c SS |
2154 | loc_atom_code = target_to_host (loc, SIZEOF_LOC_ATOM_CODE, GET_UNSIGNED, |
2155 | current_objfile); | |
2156 | loc += SIZEOF_LOC_ATOM_CODE; | |
2157 | switch (loc_atom_code) | |
2158 | { | |
c5aa993b JM |
2159 | case 0: |
2160 | /* error */ | |
2161 | loc = end; | |
2162 | break; | |
2163 | case OP_REG: | |
2164 | /* push register (number) */ | |
2165 | stack[++stacki] | |
2166 | = DWARF_REG_TO_REGNUM (target_to_host (loc, loc_value_size, | |
2167 | GET_UNSIGNED, | |
2168 | current_objfile)); | |
2169 | loc += loc_value_size; | |
2170 | dip->isreg = 1; | |
2171 | break; | |
2172 | case OP_BASEREG: | |
2173 | /* push value of register (number) */ | |
2174 | /* Actually, we compute the value as if register has 0, so the | |
2175 | value ends up being the offset from that register. */ | |
2176 | dip->offreg = 1; | |
2177 | dip->basereg = target_to_host (loc, loc_value_size, GET_UNSIGNED, | |
2178 | current_objfile); | |
2179 | loc += loc_value_size; | |
2180 | stack[++stacki] = 0; | |
2181 | break; | |
2182 | case OP_ADDR: | |
2183 | /* push address (relocated address) */ | |
2184 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2185 | GET_UNSIGNED, current_objfile); | |
2186 | loc += loc_value_size; | |
2187 | break; | |
2188 | case OP_CONST: | |
2189 | /* push constant (number) FIXME: signed or unsigned! */ | |
2190 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2191 | GET_SIGNED, current_objfile); | |
2192 | loc += loc_value_size; | |
2193 | break; | |
2194 | case OP_DEREF2: | |
2195 | /* pop, deref and push 2 bytes (as a long) */ | |
23136709 KB |
2196 | complaint (&symfile_complaints, |
2197 | "DIE @ 0x%x \"%s\", OP_DEREF2 address 0x%lx not handled", | |
2198 | DIE_ID, DIE_NAME, stack[stacki]); | |
c5aa993b JM |
2199 | break; |
2200 | case OP_DEREF4: /* pop, deref and push 4 bytes (as a long) */ | |
23136709 KB |
2201 | complaint (&symfile_complaints, |
2202 | "DIE @ 0x%x \"%s\", OP_DEREF4 address 0x%lx not handled", | |
2203 | DIE_ID, DIE_NAME, stack[stacki]); | |
c5aa993b JM |
2204 | break; |
2205 | case OP_ADD: /* pop top 2 items, add, push result */ | |
2206 | stack[stacki - 1] += stack[stacki]; | |
2207 | stacki--; | |
2208 | break; | |
c906108c SS |
2209 | } |
2210 | } | |
2211 | return (stack[stacki]); | |
2212 | } | |
2213 | ||
2214 | /* | |
2215 | ||
c5aa993b | 2216 | LOCAL FUNCTION |
c906108c | 2217 | |
c5aa993b | 2218 | read_ofile_symtab -- build a full symtab entry from chunk of DIE's |
c906108c | 2219 | |
c5aa993b | 2220 | SYNOPSIS |
c906108c | 2221 | |
c5aa993b | 2222 | static void read_ofile_symtab (struct partial_symtab *pst) |
c906108c | 2223 | |
c5aa993b | 2224 | DESCRIPTION |
c906108c | 2225 | |
c5aa993b JM |
2226 | When expanding a partial symbol table entry to a full symbol table |
2227 | entry, this is the function that gets called to read in the symbols | |
2228 | for the compilation unit. A pointer to the newly constructed symtab, | |
2229 | which is now the new first one on the objfile's symtab list, is | |
2230 | stashed in the partial symbol table entry. | |
c906108c SS |
2231 | */ |
2232 | ||
2233 | static void | |
fba45db2 | 2234 | read_ofile_symtab (struct partial_symtab *pst) |
c906108c SS |
2235 | { |
2236 | struct cleanup *back_to; | |
2237 | unsigned long lnsize; | |
2238 | file_ptr foffset; | |
2239 | bfd *abfd; | |
2240 | char lnsizedata[SIZEOF_LINETBL_LENGTH]; | |
2241 | ||
c5aa993b JM |
2242 | abfd = pst->objfile->obfd; |
2243 | current_objfile = pst->objfile; | |
c906108c SS |
2244 | |
2245 | /* Allocate a buffer for the entire chunk of DIE's for this compilation | |
2246 | unit, seek to the location in the file, and read in all the DIE's. */ | |
2247 | ||
2248 | diecount = 0; | |
2249 | dbsize = DBLENGTH (pst); | |
2250 | dbbase = xmalloc (dbsize); | |
c5aa993b JM |
2251 | dbroff = DBROFF (pst); |
2252 | foffset = DBFOFF (pst) + dbroff; | |
c906108c SS |
2253 | base_section_offsets = pst->section_offsets; |
2254 | baseaddr = ANOFFSET (pst->section_offsets, 0); | |
2255 | if (bfd_seek (abfd, foffset, SEEK_SET) || | |
3a42e9d0 | 2256 | (bfd_bread (dbbase, dbsize, abfd) != dbsize)) |
c906108c | 2257 | { |
b8c9b27d | 2258 | xfree (dbbase); |
c906108c SS |
2259 | error ("can't read DWARF data"); |
2260 | } | |
b8c9b27d | 2261 | back_to = make_cleanup (xfree, dbbase); |
c906108c SS |
2262 | |
2263 | /* If there is a line number table associated with this compilation unit | |
2264 | then read the size of this fragment in bytes, from the fragment itself. | |
2265 | Allocate a buffer for the fragment and read it in for future | |
2266 | processing. */ | |
2267 | ||
2268 | lnbase = NULL; | |
2269 | if (LNFOFF (pst)) | |
2270 | { | |
2271 | if (bfd_seek (abfd, LNFOFF (pst), SEEK_SET) || | |
4efb68b1 | 2272 | (bfd_bread (lnsizedata, sizeof (lnsizedata), abfd) |
3a42e9d0 | 2273 | != sizeof (lnsizedata))) |
c906108c SS |
2274 | { |
2275 | error ("can't read DWARF line number table size"); | |
2276 | } | |
2277 | lnsize = target_to_host (lnsizedata, SIZEOF_LINETBL_LENGTH, | |
c5aa993b | 2278 | GET_UNSIGNED, pst->objfile); |
c906108c SS |
2279 | lnbase = xmalloc (lnsize); |
2280 | if (bfd_seek (abfd, LNFOFF (pst), SEEK_SET) || | |
3a42e9d0 | 2281 | (bfd_bread (lnbase, lnsize, abfd) != lnsize)) |
c906108c | 2282 | { |
b8c9b27d | 2283 | xfree (lnbase); |
c906108c SS |
2284 | error ("can't read DWARF line numbers"); |
2285 | } | |
b8c9b27d | 2286 | make_cleanup (xfree, lnbase); |
c906108c SS |
2287 | } |
2288 | ||
c5aa993b | 2289 | process_dies (dbbase, dbbase + dbsize, pst->objfile); |
c906108c SS |
2290 | do_cleanups (back_to); |
2291 | current_objfile = NULL; | |
c5aa993b | 2292 | pst->symtab = pst->objfile->symtabs; |
c906108c SS |
2293 | } |
2294 | ||
2295 | /* | |
2296 | ||
c5aa993b | 2297 | LOCAL FUNCTION |
c906108c | 2298 | |
c5aa993b | 2299 | psymtab_to_symtab_1 -- do grunt work for building a full symtab entry |
c906108c | 2300 | |
c5aa993b | 2301 | SYNOPSIS |
c906108c | 2302 | |
c5aa993b | 2303 | static void psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c | 2304 | |
c5aa993b | 2305 | DESCRIPTION |
c906108c | 2306 | |
c5aa993b JM |
2307 | Called once for each partial symbol table entry that needs to be |
2308 | expanded into a full symbol table entry. | |
c906108c | 2309 | |
c5aa993b | 2310 | */ |
c906108c SS |
2311 | |
2312 | static void | |
fba45db2 | 2313 | psymtab_to_symtab_1 (struct partial_symtab *pst) |
c906108c SS |
2314 | { |
2315 | int i; | |
2316 | struct cleanup *old_chain; | |
c5aa993b | 2317 | |
c906108c SS |
2318 | if (pst != NULL) |
2319 | { | |
2320 | if (pst->readin) | |
2321 | { | |
2322 | warning ("psymtab for %s already read in. Shouldn't happen.", | |
c5aa993b | 2323 | pst->filename); |
c906108c SS |
2324 | } |
2325 | else | |
2326 | { | |
2327 | /* Read in all partial symtabs on which this one is dependent */ | |
c5aa993b | 2328 | for (i = 0; i < pst->number_of_dependencies; i++) |
c906108c | 2329 | { |
c5aa993b | 2330 | if (!pst->dependencies[i]->readin) |
c906108c SS |
2331 | { |
2332 | /* Inform about additional files that need to be read in. */ | |
2333 | if (info_verbose) | |
2334 | { | |
2335 | fputs_filtered (" ", gdb_stdout); | |
2336 | wrap_here (""); | |
2337 | fputs_filtered ("and ", gdb_stdout); | |
2338 | wrap_here (""); | |
2339 | printf_filtered ("%s...", | |
c5aa993b | 2340 | pst->dependencies[i]->filename); |
c906108c | 2341 | wrap_here (""); |
c5aa993b | 2342 | gdb_flush (gdb_stdout); /* Flush output */ |
c906108c | 2343 | } |
c5aa993b | 2344 | psymtab_to_symtab_1 (pst->dependencies[i]); |
c906108c | 2345 | } |
c5aa993b JM |
2346 | } |
2347 | if (DBLENGTH (pst)) /* Otherwise it's a dummy */ | |
c906108c SS |
2348 | { |
2349 | buildsym_init (); | |
a0b3c4fd | 2350 | old_chain = make_cleanup (really_free_pendings, 0); |
c906108c SS |
2351 | read_ofile_symtab (pst); |
2352 | if (info_verbose) | |
2353 | { | |
2354 | printf_filtered ("%d DIE's, sorting...", diecount); | |
2355 | wrap_here (""); | |
2356 | gdb_flush (gdb_stdout); | |
2357 | } | |
c906108c SS |
2358 | do_cleanups (old_chain); |
2359 | } | |
c5aa993b | 2360 | pst->readin = 1; |
c906108c SS |
2361 | } |
2362 | } | |
2363 | } | |
2364 | ||
2365 | /* | |
2366 | ||
c5aa993b | 2367 | LOCAL FUNCTION |
c906108c | 2368 | |
c5aa993b | 2369 | dwarf_psymtab_to_symtab -- build a full symtab entry from partial one |
c906108c | 2370 | |
c5aa993b | 2371 | SYNOPSIS |
c906108c | 2372 | |
c5aa993b | 2373 | static void dwarf_psymtab_to_symtab (struct partial_symtab *pst) |
c906108c | 2374 | |
c5aa993b | 2375 | DESCRIPTION |
c906108c | 2376 | |
c5aa993b JM |
2377 | This is the DWARF support entry point for building a full symbol |
2378 | table entry from a partial symbol table entry. We are passed a | |
2379 | pointer to the partial symbol table entry that needs to be expanded. | |
c906108c | 2380 | |
c5aa993b | 2381 | */ |
c906108c SS |
2382 | |
2383 | static void | |
fba45db2 | 2384 | dwarf_psymtab_to_symtab (struct partial_symtab *pst) |
c906108c SS |
2385 | { |
2386 | ||
2387 | if (pst != NULL) | |
2388 | { | |
c5aa993b | 2389 | if (pst->readin) |
c906108c SS |
2390 | { |
2391 | warning ("psymtab for %s already read in. Shouldn't happen.", | |
c5aa993b | 2392 | pst->filename); |
c906108c SS |
2393 | } |
2394 | else | |
2395 | { | |
c5aa993b | 2396 | if (DBLENGTH (pst) || pst->number_of_dependencies) |
c906108c SS |
2397 | { |
2398 | /* Print the message now, before starting serious work, to avoid | |
c5aa993b | 2399 | disconcerting pauses. */ |
c906108c SS |
2400 | if (info_verbose) |
2401 | { | |
2402 | printf_filtered ("Reading in symbols for %s...", | |
c5aa993b | 2403 | pst->filename); |
c906108c SS |
2404 | gdb_flush (gdb_stdout); |
2405 | } | |
c5aa993b | 2406 | |
c906108c | 2407 | psymtab_to_symtab_1 (pst); |
c5aa993b JM |
2408 | |
2409 | #if 0 /* FIXME: Check to see what dbxread is doing here and see if | |
2410 | we need to do an equivalent or is this something peculiar to | |
2411 | stabs/a.out format. | |
2412 | Match with global symbols. This only needs to be done once, | |
2413 | after all of the symtabs and dependencies have been read in. | |
2414 | */ | |
2415 | scan_file_globals (pst->objfile); | |
c906108c | 2416 | #endif |
c5aa993b | 2417 | |
c906108c SS |
2418 | /* Finish up the verbose info message. */ |
2419 | if (info_verbose) | |
2420 | { | |
2421 | printf_filtered ("done.\n"); | |
2422 | gdb_flush (gdb_stdout); | |
2423 | } | |
2424 | } | |
2425 | } | |
2426 | } | |
2427 | } | |
2428 | ||
2429 | /* | |
2430 | ||
c5aa993b | 2431 | LOCAL FUNCTION |
c906108c | 2432 | |
c5aa993b | 2433 | add_enum_psymbol -- add enumeration members to partial symbol table |
c906108c | 2434 | |
c5aa993b | 2435 | DESCRIPTION |
c906108c | 2436 | |
c5aa993b JM |
2437 | Given pointer to a DIE that is known to be for an enumeration, |
2438 | extract the symbolic names of the enumeration members and add | |
2439 | partial symbols for them. | |
2440 | */ | |
c906108c SS |
2441 | |
2442 | static void | |
fba45db2 | 2443 | add_enum_psymbol (struct dieinfo *dip, struct objfile *objfile) |
c906108c SS |
2444 | { |
2445 | char *scan; | |
2446 | char *listend; | |
2447 | unsigned short blocksz; | |
2448 | int nbytes; | |
c5aa993b | 2449 | |
b59661bd AC |
2450 | scan = dip->at_element_list; |
2451 | if (scan != NULL) | |
c906108c | 2452 | { |
c5aa993b | 2453 | if (dip->short_element_list) |
c906108c SS |
2454 | { |
2455 | nbytes = attribute_size (AT_short_element_list); | |
2456 | } | |
2457 | else | |
2458 | { | |
2459 | nbytes = attribute_size (AT_element_list); | |
2460 | } | |
2461 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); | |
2462 | scan += nbytes; | |
2463 | listend = scan + blocksz; | |
2464 | while (scan < listend) | |
2465 | { | |
2466 | scan += TARGET_FT_LONG_SIZE (objfile); | |
176620f1 | 2467 | add_psymbol_to_list (scan, strlen (scan), VAR_DOMAIN, LOC_CONST, |
c5aa993b | 2468 | &objfile->static_psymbols, 0, 0, cu_language, |
c906108c SS |
2469 | objfile); |
2470 | scan += strlen (scan) + 1; | |
2471 | } | |
2472 | } | |
2473 | } | |
2474 | ||
2475 | /* | |
2476 | ||
c5aa993b | 2477 | LOCAL FUNCTION |
c906108c | 2478 | |
c5aa993b | 2479 | add_partial_symbol -- add symbol to partial symbol table |
c906108c | 2480 | |
c5aa993b | 2481 | DESCRIPTION |
c906108c | 2482 | |
c5aa993b JM |
2483 | Given a DIE, if it is one of the types that we want to |
2484 | add to a partial symbol table, finish filling in the die info | |
2485 | and then add a partial symbol table entry for it. | |
c906108c | 2486 | |
c5aa993b | 2487 | NOTES |
c906108c | 2488 | |
c5aa993b JM |
2489 | The caller must ensure that the DIE has a valid name attribute. |
2490 | */ | |
c906108c SS |
2491 | |
2492 | static void | |
fba45db2 | 2493 | add_partial_symbol (struct dieinfo *dip, struct objfile *objfile) |
c906108c | 2494 | { |
c5aa993b | 2495 | switch (dip->die_tag) |
c906108c SS |
2496 | { |
2497 | case TAG_global_subroutine: | |
c5aa993b | 2498 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
176620f1 | 2499 | VAR_DOMAIN, LOC_BLOCK, |
c5aa993b JM |
2500 | &objfile->global_psymbols, |
2501 | 0, dip->at_low_pc, cu_language, objfile); | |
c906108c SS |
2502 | break; |
2503 | case TAG_global_variable: | |
c5aa993b | 2504 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
176620f1 | 2505 | VAR_DOMAIN, LOC_STATIC, |
c5aa993b | 2506 | &objfile->global_psymbols, |
c906108c SS |
2507 | 0, 0, cu_language, objfile); |
2508 | break; | |
2509 | case TAG_subroutine: | |
c5aa993b | 2510 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
176620f1 | 2511 | VAR_DOMAIN, LOC_BLOCK, |
c5aa993b JM |
2512 | &objfile->static_psymbols, |
2513 | 0, dip->at_low_pc, cu_language, objfile); | |
c906108c SS |
2514 | break; |
2515 | case TAG_local_variable: | |
c5aa993b | 2516 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
176620f1 | 2517 | VAR_DOMAIN, LOC_STATIC, |
c5aa993b | 2518 | &objfile->static_psymbols, |
c906108c SS |
2519 | 0, 0, cu_language, objfile); |
2520 | break; | |
2521 | case TAG_typedef: | |
c5aa993b | 2522 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
176620f1 | 2523 | VAR_DOMAIN, LOC_TYPEDEF, |
c5aa993b | 2524 | &objfile->static_psymbols, |
c906108c SS |
2525 | 0, 0, cu_language, objfile); |
2526 | break; | |
2527 | case TAG_class_type: | |
2528 | case TAG_structure_type: | |
2529 | case TAG_union_type: | |
2530 | case TAG_enumeration_type: | |
2531 | /* Do not add opaque aggregate definitions to the psymtab. */ | |
c5aa993b | 2532 | if (!dip->has_at_byte_size) |
c906108c | 2533 | break; |
c5aa993b | 2534 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
176620f1 | 2535 | STRUCT_DOMAIN, LOC_TYPEDEF, |
c5aa993b | 2536 | &objfile->static_psymbols, |
c906108c SS |
2537 | 0, 0, cu_language, objfile); |
2538 | if (cu_language == language_cplus) | |
2539 | { | |
2540 | /* For C++, these implicitly act as typedefs as well. */ | |
c5aa993b | 2541 | add_psymbol_to_list (dip->at_name, strlen (dip->at_name), |
176620f1 | 2542 | VAR_DOMAIN, LOC_TYPEDEF, |
c5aa993b | 2543 | &objfile->static_psymbols, |
c906108c SS |
2544 | 0, 0, cu_language, objfile); |
2545 | } | |
2546 | break; | |
2547 | } | |
2548 | } | |
9846de1b | 2549 | /* *INDENT-OFF* */ |
c906108c SS |
2550 | /* |
2551 | ||
2552 | LOCAL FUNCTION | |
2553 | ||
2554 | scan_partial_symbols -- scan DIE's within a single compilation unit | |
2555 | ||
2556 | DESCRIPTION | |
2557 | ||
2558 | Process the DIE's within a single compilation unit, looking for | |
2559 | interesting DIE's that contribute to the partial symbol table entry | |
2560 | for this compilation unit. | |
2561 | ||
2562 | NOTES | |
2563 | ||
2564 | There are some DIE's that may appear both at file scope and within | |
2565 | the scope of a function. We are only interested in the ones at file | |
2566 | scope, and the only way to tell them apart is to keep track of the | |
2567 | scope. For example, consider the test case: | |
2568 | ||
2569 | static int i; | |
2570 | main () { int j; } | |
2571 | ||
2572 | for which the relevant DWARF segment has the structure: | |
2573 | ||
2574 | 0x51: | |
2575 | 0x23 global subrtn sibling 0x9b | |
2576 | name main | |
2577 | fund_type FT_integer | |
2578 | low_pc 0x800004cc | |
2579 | high_pc 0x800004d4 | |
2580 | ||
2581 | 0x74: | |
2582 | 0x23 local var sibling 0x97 | |
2583 | name j | |
2584 | fund_type FT_integer | |
2585 | location OP_BASEREG 0xe | |
2586 | OP_CONST 0xfffffffc | |
2587 | OP_ADD | |
2588 | 0x97: | |
2589 | 0x4 | |
2590 | ||
2591 | 0x9b: | |
2592 | 0x1d local var sibling 0xb8 | |
2593 | name i | |
2594 | fund_type FT_integer | |
2595 | location OP_ADDR 0x800025dc | |
2596 | ||
2597 | 0xb8: | |
2598 | 0x4 | |
2599 | ||
2600 | We want to include the symbol 'i' in the partial symbol table, but | |
2601 | not the symbol 'j'. In essence, we want to skip all the dies within | |
2602 | the scope of a TAG_global_subroutine DIE. | |
2603 | ||
2604 | Don't attempt to add anonymous structures or unions since they have | |
2605 | no name. Anonymous enumerations however are processed, because we | |
2606 | want to extract their member names (the check for a tag name is | |
2607 | done later). | |
2608 | ||
2609 | Also, for variables and subroutines, check that this is the place | |
2610 | where the actual definition occurs, rather than just a reference | |
2611 | to an external. | |
2612 | */ | |
9846de1b | 2613 | /* *INDENT-ON* */ |
c906108c | 2614 | |
c5aa993b JM |
2615 | |
2616 | ||
c906108c | 2617 | static void |
fba45db2 | 2618 | scan_partial_symbols (char *thisdie, char *enddie, struct objfile *objfile) |
c906108c SS |
2619 | { |
2620 | char *nextdie; | |
2621 | char *temp; | |
2622 | struct dieinfo di; | |
c5aa993b | 2623 | |
c906108c SS |
2624 | while (thisdie < enddie) |
2625 | { | |
2626 | basicdieinfo (&di, thisdie, objfile); | |
2627 | if (di.die_length < SIZEOF_DIE_LENGTH) | |
2628 | { | |
2629 | break; | |
2630 | } | |
2631 | else | |
2632 | { | |
2633 | nextdie = thisdie + di.die_length; | |
2634 | /* To avoid getting complete die information for every die, we | |
2635 | only do it (below) for the cases we are interested in. */ | |
2636 | switch (di.die_tag) | |
2637 | { | |
2638 | case TAG_global_subroutine: | |
2639 | case TAG_subroutine: | |
2640 | completedieinfo (&di, objfile); | |
2641 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2642 | { | |
2643 | add_partial_symbol (&di, objfile); | |
2644 | /* If there is a sibling attribute, adjust the nextdie | |
2645 | pointer to skip the entire scope of the subroutine. | |
2646 | Apply some sanity checking to make sure we don't | |
2647 | overrun or underrun the range of remaining DIE's */ | |
2648 | if (di.at_sibling != 0) | |
2649 | { | |
2650 | temp = dbbase + di.at_sibling - dbroff; | |
2651 | if ((temp < thisdie) || (temp >= enddie)) | |
2652 | { | |
23136709 KB |
2653 | bad_die_ref_complaint (DIE_ID, DIE_NAME, |
2654 | di.at_sibling); | |
c906108c SS |
2655 | } |
2656 | else | |
2657 | { | |
2658 | nextdie = temp; | |
2659 | } | |
2660 | } | |
2661 | } | |
2662 | break; | |
2663 | case TAG_global_variable: | |
2664 | case TAG_local_variable: | |
2665 | completedieinfo (&di, objfile); | |
2666 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2667 | { | |
2668 | add_partial_symbol (&di, objfile); | |
2669 | } | |
2670 | break; | |
2671 | case TAG_typedef: | |
2672 | case TAG_class_type: | |
2673 | case TAG_structure_type: | |
2674 | case TAG_union_type: | |
2675 | completedieinfo (&di, objfile); | |
2676 | if (di.at_name) | |
2677 | { | |
2678 | add_partial_symbol (&di, objfile); | |
2679 | } | |
2680 | break; | |
2681 | case TAG_enumeration_type: | |
2682 | completedieinfo (&di, objfile); | |
2683 | if (di.at_name) | |
2684 | { | |
2685 | add_partial_symbol (&di, objfile); | |
2686 | } | |
2687 | add_enum_psymbol (&di, objfile); | |
2688 | break; | |
2689 | } | |
2690 | } | |
2691 | thisdie = nextdie; | |
2692 | } | |
2693 | } | |
2694 | ||
2695 | /* | |
2696 | ||
c5aa993b | 2697 | LOCAL FUNCTION |
c906108c | 2698 | |
c5aa993b | 2699 | scan_compilation_units -- build a psymtab entry for each compilation |
c906108c | 2700 | |
c5aa993b | 2701 | DESCRIPTION |
c906108c | 2702 | |
c5aa993b JM |
2703 | This is the top level dwarf parsing routine for building partial |
2704 | symbol tables. | |
c906108c | 2705 | |
c5aa993b JM |
2706 | It scans from the beginning of the DWARF table looking for the first |
2707 | TAG_compile_unit DIE, and then follows the sibling chain to locate | |
2708 | each additional TAG_compile_unit DIE. | |
2709 | ||
2710 | For each TAG_compile_unit DIE it creates a partial symtab structure, | |
2711 | calls a subordinate routine to collect all the compilation unit's | |
2712 | global DIE's, file scope DIEs, typedef DIEs, etc, and then links the | |
2713 | new partial symtab structure into the partial symbol table. It also | |
2714 | records the appropriate information in the partial symbol table entry | |
2715 | to allow the chunk of DIE's and line number table for this compilation | |
2716 | unit to be located and re-read later, to generate a complete symbol | |
2717 | table entry for the compilation unit. | |
2718 | ||
2719 | Thus it effectively partitions up a chunk of DIE's for multiple | |
2720 | compilation units into smaller DIE chunks and line number tables, | |
2721 | and associates them with a partial symbol table entry. | |
2722 | ||
2723 | NOTES | |
c906108c | 2724 | |
c5aa993b JM |
2725 | If any compilation unit has no line number table associated with |
2726 | it for some reason (a missing at_stmt_list attribute, rather than | |
2727 | just one with a value of zero, which is valid) then we ensure that | |
2728 | the recorded file offset is zero so that the routine which later | |
2729 | reads line number table fragments knows that there is no fragment | |
2730 | to read. | |
c906108c | 2731 | |
c5aa993b | 2732 | RETURNS |
c906108c | 2733 | |
c5aa993b | 2734 | Returns no value. |
c906108c SS |
2735 | |
2736 | */ | |
2737 | ||
2738 | static void | |
fba45db2 KB |
2739 | scan_compilation_units (char *thisdie, char *enddie, file_ptr dbfoff, |
2740 | file_ptr lnoffset, struct objfile *objfile) | |
c906108c SS |
2741 | { |
2742 | char *nextdie; | |
2743 | struct dieinfo di; | |
2744 | struct partial_symtab *pst; | |
2745 | int culength; | |
2746 | int curoff; | |
2747 | file_ptr curlnoffset; | |
2748 | ||
2749 | while (thisdie < enddie) | |
2750 | { | |
2751 | basicdieinfo (&di, thisdie, objfile); | |
2752 | if (di.die_length < SIZEOF_DIE_LENGTH) | |
2753 | { | |
2754 | break; | |
2755 | } | |
2756 | else if (di.die_tag != TAG_compile_unit) | |
2757 | { | |
2758 | nextdie = thisdie + di.die_length; | |
2759 | } | |
2760 | else | |
2761 | { | |
2762 | completedieinfo (&di, objfile); | |
2763 | set_cu_language (&di); | |
2764 | if (di.at_sibling != 0) | |
2765 | { | |
2766 | nextdie = dbbase + di.at_sibling - dbroff; | |
2767 | } | |
2768 | else | |
2769 | { | |
2770 | nextdie = thisdie + di.die_length; | |
2771 | } | |
2772 | curoff = thisdie - dbbase; | |
2773 | culength = nextdie - thisdie; | |
2774 | curlnoffset = di.has_at_stmt_list ? lnoffset + di.at_stmt_list : 0; | |
2775 | ||
2776 | /* First allocate a new partial symbol table structure */ | |
2777 | ||
2778 | pst = start_psymtab_common (objfile, base_section_offsets, | |
2779 | di.at_name, di.at_low_pc, | |
c5aa993b JM |
2780 | objfile->global_psymbols.next, |
2781 | objfile->static_psymbols.next); | |
c906108c | 2782 | |
c5aa993b JM |
2783 | pst->texthigh = di.at_high_pc; |
2784 | pst->read_symtab_private = (char *) | |
2785 | obstack_alloc (&objfile->psymbol_obstack, | |
2786 | sizeof (struct dwfinfo)); | |
c906108c SS |
2787 | DBFOFF (pst) = dbfoff; |
2788 | DBROFF (pst) = curoff; | |
2789 | DBLENGTH (pst) = culength; | |
c5aa993b JM |
2790 | LNFOFF (pst) = curlnoffset; |
2791 | pst->read_symtab = dwarf_psymtab_to_symtab; | |
c906108c SS |
2792 | |
2793 | /* Now look for partial symbols */ | |
2794 | ||
2795 | scan_partial_symbols (thisdie + di.die_length, nextdie, objfile); | |
2796 | ||
c5aa993b JM |
2797 | pst->n_global_syms = objfile->global_psymbols.next - |
2798 | (objfile->global_psymbols.list + pst->globals_offset); | |
2799 | pst->n_static_syms = objfile->static_psymbols.next - | |
2800 | (objfile->static_psymbols.list + pst->statics_offset); | |
c906108c SS |
2801 | sort_pst_symbols (pst); |
2802 | /* If there is already a psymtab or symtab for a file of this name, | |
2803 | remove it. (If there is a symtab, more drastic things also | |
2804 | happen.) This happens in VxWorks. */ | |
c5aa993b | 2805 | free_named_symtabs (pst->filename); |
c906108c | 2806 | } |
c5aa993b | 2807 | thisdie = nextdie; |
c906108c SS |
2808 | } |
2809 | } | |
2810 | ||
2811 | /* | |
2812 | ||
c5aa993b | 2813 | LOCAL FUNCTION |
c906108c | 2814 | |
c5aa993b | 2815 | new_symbol -- make a symbol table entry for a new symbol |
c906108c | 2816 | |
c5aa993b | 2817 | SYNOPSIS |
c906108c | 2818 | |
c5aa993b JM |
2819 | static struct symbol *new_symbol (struct dieinfo *dip, |
2820 | struct objfile *objfile) | |
c906108c | 2821 | |
c5aa993b | 2822 | DESCRIPTION |
c906108c | 2823 | |
c5aa993b JM |
2824 | Given a pointer to a DWARF information entry, figure out if we need |
2825 | to make a symbol table entry for it, and if so, create a new entry | |
2826 | and return a pointer to it. | |
c906108c SS |
2827 | */ |
2828 | ||
2829 | static struct symbol * | |
fba45db2 | 2830 | new_symbol (struct dieinfo *dip, struct objfile *objfile) |
c906108c SS |
2831 | { |
2832 | struct symbol *sym = NULL; | |
c5aa993b JM |
2833 | |
2834 | if (dip->at_name != NULL) | |
c906108c | 2835 | { |
c5aa993b | 2836 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
c906108c SS |
2837 | sizeof (struct symbol)); |
2838 | OBJSTAT (objfile, n_syms++); | |
2839 | memset (sym, 0, sizeof (struct symbol)); | |
c906108c | 2840 | /* default assumptions */ |
176620f1 | 2841 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
c906108c SS |
2842 | SYMBOL_CLASS (sym) = LOC_STATIC; |
2843 | SYMBOL_TYPE (sym) = decode_die_type (dip); | |
2844 | ||
2845 | /* If this symbol is from a C++ compilation, then attempt to cache the | |
c5aa993b JM |
2846 | demangled form for future reference. This is a typical time versus |
2847 | space tradeoff, that was decided in favor of time because it sped up | |
2848 | C++ symbol lookups by a factor of about 20. */ | |
c906108c SS |
2849 | |
2850 | SYMBOL_LANGUAGE (sym) = cu_language; | |
2de7ced7 | 2851 | SYMBOL_SET_NAMES (sym, dip->at_name, strlen (dip->at_name), objfile); |
c5aa993b | 2852 | switch (dip->die_tag) |
c906108c SS |
2853 | { |
2854 | case TAG_label: | |
c5aa993b | 2855 | SYMBOL_VALUE_ADDRESS (sym) = dip->at_low_pc; |
c906108c SS |
2856 | SYMBOL_CLASS (sym) = LOC_LABEL; |
2857 | break; | |
2858 | case TAG_global_subroutine: | |
2859 | case TAG_subroutine: | |
c5aa993b | 2860 | SYMBOL_VALUE_ADDRESS (sym) = dip->at_low_pc; |
c906108c | 2861 | SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym)); |
c5aa993b | 2862 | if (dip->at_prototyped) |
c906108c SS |
2863 | TYPE_FLAGS (SYMBOL_TYPE (sym)) |= TYPE_FLAG_PROTOTYPED; |
2864 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
c5aa993b | 2865 | if (dip->die_tag == TAG_global_subroutine) |
c906108c SS |
2866 | { |
2867 | add_symbol_to_list (sym, &global_symbols); | |
2868 | } | |
2869 | else | |
2870 | { | |
2871 | add_symbol_to_list (sym, list_in_scope); | |
2872 | } | |
2873 | break; | |
2874 | case TAG_global_variable: | |
c5aa993b | 2875 | if (dip->at_location != NULL) |
c906108c SS |
2876 | { |
2877 | SYMBOL_VALUE_ADDRESS (sym) = locval (dip); | |
2878 | add_symbol_to_list (sym, &global_symbols); | |
2879 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2880 | SYMBOL_VALUE (sym) += baseaddr; | |
2881 | } | |
2882 | break; | |
2883 | case TAG_local_variable: | |
c5aa993b | 2884 | if (dip->at_location != NULL) |
c906108c SS |
2885 | { |
2886 | int loc = locval (dip); | |
c5aa993b | 2887 | if (dip->optimized_out) |
c906108c SS |
2888 | { |
2889 | SYMBOL_CLASS (sym) = LOC_OPTIMIZED_OUT; | |
2890 | } | |
c5aa993b | 2891 | else if (dip->isreg) |
c906108c SS |
2892 | { |
2893 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
2894 | } | |
c5aa993b | 2895 | else if (dip->offreg) |
c906108c SS |
2896 | { |
2897 | SYMBOL_CLASS (sym) = LOC_BASEREG; | |
c5aa993b | 2898 | SYMBOL_BASEREG (sym) = dip->basereg; |
c906108c SS |
2899 | } |
2900 | else | |
2901 | { | |
2902 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2903 | SYMBOL_VALUE (sym) += baseaddr; | |
2904 | } | |
2905 | if (SYMBOL_CLASS (sym) == LOC_STATIC) | |
2906 | { | |
2907 | /* LOC_STATIC address class MUST use SYMBOL_VALUE_ADDRESS, | |
2908 | which may store to a bigger location than SYMBOL_VALUE. */ | |
2909 | SYMBOL_VALUE_ADDRESS (sym) = loc; | |
2910 | } | |
2911 | else | |
2912 | { | |
2913 | SYMBOL_VALUE (sym) = loc; | |
2914 | } | |
2915 | add_symbol_to_list (sym, list_in_scope); | |
2916 | } | |
2917 | break; | |
2918 | case TAG_formal_parameter: | |
c5aa993b | 2919 | if (dip->at_location != NULL) |
c906108c SS |
2920 | { |
2921 | SYMBOL_VALUE (sym) = locval (dip); | |
2922 | } | |
2923 | add_symbol_to_list (sym, list_in_scope); | |
c5aa993b | 2924 | if (dip->isreg) |
c906108c SS |
2925 | { |
2926 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
2927 | } | |
c5aa993b | 2928 | else if (dip->offreg) |
c906108c SS |
2929 | { |
2930 | SYMBOL_CLASS (sym) = LOC_BASEREG_ARG; | |
c5aa993b | 2931 | SYMBOL_BASEREG (sym) = dip->basereg; |
c906108c SS |
2932 | } |
2933 | else | |
2934 | { | |
2935 | SYMBOL_CLASS (sym) = LOC_ARG; | |
2936 | } | |
2937 | break; | |
2938 | case TAG_unspecified_parameters: | |
2939 | /* From varargs functions; gdb doesn't seem to have any interest in | |
2940 | this information, so just ignore it for now. (FIXME?) */ | |
2941 | break; | |
2942 | case TAG_class_type: | |
2943 | case TAG_structure_type: | |
2944 | case TAG_union_type: | |
2945 | case TAG_enumeration_type: | |
2946 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
176620f1 | 2947 | SYMBOL_DOMAIN (sym) = STRUCT_DOMAIN; |
c906108c SS |
2948 | add_symbol_to_list (sym, list_in_scope); |
2949 | break; | |
2950 | case TAG_typedef: | |
2951 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
176620f1 | 2952 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
c906108c SS |
2953 | add_symbol_to_list (sym, list_in_scope); |
2954 | break; | |
2955 | default: | |
2956 | /* Not a tag we recognize. Hopefully we aren't processing trash | |
2957 | data, but since we must specifically ignore things we don't | |
2958 | recognize, there is nothing else we should do at this point. */ | |
2959 | break; | |
2960 | } | |
2961 | } | |
2962 | return (sym); | |
2963 | } | |
2964 | ||
2965 | /* | |
2966 | ||
c5aa993b | 2967 | LOCAL FUNCTION |
c906108c | 2968 | |
c5aa993b | 2969 | synthesize_typedef -- make a symbol table entry for a "fake" typedef |
c906108c | 2970 | |
c5aa993b | 2971 | SYNOPSIS |
c906108c | 2972 | |
c5aa993b JM |
2973 | static void synthesize_typedef (struct dieinfo *dip, |
2974 | struct objfile *objfile, | |
2975 | struct type *type); | |
c906108c | 2976 | |
c5aa993b | 2977 | DESCRIPTION |
c906108c | 2978 | |
c5aa993b JM |
2979 | Given a pointer to a DWARF information entry, synthesize a typedef |
2980 | for the name in the DIE, using the specified type. | |
c906108c | 2981 | |
c5aa993b JM |
2982 | This is used for C++ class, structs, unions, and enumerations to |
2983 | set up the tag name as a type. | |
c906108c SS |
2984 | |
2985 | */ | |
2986 | ||
2987 | static void | |
fba45db2 KB |
2988 | synthesize_typedef (struct dieinfo *dip, struct objfile *objfile, |
2989 | struct type *type) | |
c906108c SS |
2990 | { |
2991 | struct symbol *sym = NULL; | |
c5aa993b JM |
2992 | |
2993 | if (dip->at_name != NULL) | |
c906108c SS |
2994 | { |
2995 | sym = (struct symbol *) | |
c5aa993b | 2996 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct symbol)); |
c906108c SS |
2997 | OBJSTAT (objfile, n_syms++); |
2998 | memset (sym, 0, sizeof (struct symbol)); | |
22abf04a | 2999 | DEPRECATED_SYMBOL_NAME (sym) = create_name (dip->at_name, |
c906108c SS |
3000 | &objfile->symbol_obstack); |
3001 | SYMBOL_INIT_LANGUAGE_SPECIFIC (sym, cu_language); | |
3002 | SYMBOL_TYPE (sym) = type; | |
3003 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
176620f1 | 3004 | SYMBOL_DOMAIN (sym) = VAR_DOMAIN; |
c906108c SS |
3005 | add_symbol_to_list (sym, list_in_scope); |
3006 | } | |
3007 | } | |
3008 | ||
3009 | /* | |
3010 | ||
c5aa993b | 3011 | LOCAL FUNCTION |
c906108c | 3012 | |
c5aa993b | 3013 | decode_mod_fund_type -- decode a modified fundamental type |
c906108c | 3014 | |
c5aa993b | 3015 | SYNOPSIS |
c906108c | 3016 | |
c5aa993b | 3017 | static struct type *decode_mod_fund_type (char *typedata) |
c906108c | 3018 | |
c5aa993b | 3019 | DESCRIPTION |
c906108c | 3020 | |
c5aa993b JM |
3021 | Decode a block of data containing a modified fundamental |
3022 | type specification. TYPEDATA is a pointer to the block, | |
3023 | which starts with a length containing the size of the rest | |
3024 | of the block. At the end of the block is a fundmental type | |
3025 | code value that gives the fundamental type. Everything | |
3026 | in between are type modifiers. | |
c906108c | 3027 | |
c5aa993b JM |
3028 | We simply compute the number of modifiers and call the general |
3029 | function decode_modified_type to do the actual work. | |
3030 | */ | |
c906108c SS |
3031 | |
3032 | static struct type * | |
fba45db2 | 3033 | decode_mod_fund_type (char *typedata) |
c906108c SS |
3034 | { |
3035 | struct type *typep = NULL; | |
3036 | unsigned short modcount; | |
3037 | int nbytes; | |
c5aa993b | 3038 | |
c906108c SS |
3039 | /* Get the total size of the block, exclusive of the size itself */ |
3040 | ||
3041 | nbytes = attribute_size (AT_mod_fund_type); | |
3042 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3043 | typedata += nbytes; | |
3044 | ||
3045 | /* Deduct the size of the fundamental type bytes at the end of the block. */ | |
3046 | ||
3047 | modcount -= attribute_size (AT_fund_type); | |
3048 | ||
3049 | /* Now do the actual decoding */ | |
3050 | ||
3051 | typep = decode_modified_type (typedata, modcount, AT_mod_fund_type); | |
3052 | return (typep); | |
3053 | } | |
3054 | ||
3055 | /* | |
3056 | ||
c5aa993b | 3057 | LOCAL FUNCTION |
c906108c | 3058 | |
c5aa993b | 3059 | decode_mod_u_d_type -- decode a modified user defined type |
c906108c | 3060 | |
c5aa993b | 3061 | SYNOPSIS |
c906108c | 3062 | |
c5aa993b | 3063 | static struct type *decode_mod_u_d_type (char *typedata) |
c906108c | 3064 | |
c5aa993b | 3065 | DESCRIPTION |
c906108c | 3066 | |
c5aa993b JM |
3067 | Decode a block of data containing a modified user defined |
3068 | type specification. TYPEDATA is a pointer to the block, | |
3069 | which consists of a two byte length, containing the size | |
3070 | of the rest of the block. At the end of the block is a | |
3071 | four byte value that gives a reference to a user defined type. | |
3072 | Everything in between are type modifiers. | |
c906108c | 3073 | |
c5aa993b JM |
3074 | We simply compute the number of modifiers and call the general |
3075 | function decode_modified_type to do the actual work. | |
3076 | */ | |
c906108c SS |
3077 | |
3078 | static struct type * | |
fba45db2 | 3079 | decode_mod_u_d_type (char *typedata) |
c906108c SS |
3080 | { |
3081 | struct type *typep = NULL; | |
3082 | unsigned short modcount; | |
3083 | int nbytes; | |
c5aa993b | 3084 | |
c906108c SS |
3085 | /* Get the total size of the block, exclusive of the size itself */ |
3086 | ||
3087 | nbytes = attribute_size (AT_mod_u_d_type); | |
3088 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3089 | typedata += nbytes; | |
3090 | ||
3091 | /* Deduct the size of the reference type bytes at the end of the block. */ | |
3092 | ||
3093 | modcount -= attribute_size (AT_user_def_type); | |
3094 | ||
3095 | /* Now do the actual decoding */ | |
3096 | ||
3097 | typep = decode_modified_type (typedata, modcount, AT_mod_u_d_type); | |
3098 | return (typep); | |
3099 | } | |
3100 | ||
3101 | /* | |
3102 | ||
c5aa993b | 3103 | LOCAL FUNCTION |
c906108c | 3104 | |
c5aa993b | 3105 | decode_modified_type -- decode modified user or fundamental type |
c906108c | 3106 | |
c5aa993b | 3107 | SYNOPSIS |
c906108c | 3108 | |
c5aa993b JM |
3109 | static struct type *decode_modified_type (char *modifiers, |
3110 | unsigned short modcount, int mtype) | |
c906108c | 3111 | |
c5aa993b | 3112 | DESCRIPTION |
c906108c | 3113 | |
c5aa993b JM |
3114 | Decode a modified type, either a modified fundamental type or |
3115 | a modified user defined type. MODIFIERS is a pointer to the | |
3116 | block of bytes that define MODCOUNT modifiers. Immediately | |
3117 | following the last modifier is a short containing the fundamental | |
3118 | type or a long containing the reference to the user defined | |
3119 | type. Which one is determined by MTYPE, which is either | |
3120 | AT_mod_fund_type or AT_mod_u_d_type to indicate what modified | |
3121 | type we are generating. | |
c906108c | 3122 | |
c5aa993b JM |
3123 | We call ourself recursively to generate each modified type,` |
3124 | until MODCOUNT reaches zero, at which point we have consumed | |
3125 | all the modifiers and generate either the fundamental type or | |
3126 | user defined type. When the recursion unwinds, each modifier | |
3127 | is applied in turn to generate the full modified type. | |
3128 | ||
3129 | NOTES | |
c906108c | 3130 | |
c5aa993b JM |
3131 | If we find a modifier that we don't recognize, and it is not one |
3132 | of those reserved for application specific use, then we issue a | |
3133 | warning and simply ignore the modifier. | |
c906108c | 3134 | |
c5aa993b | 3135 | BUGS |
c906108c | 3136 | |
c5aa993b | 3137 | We currently ignore MOD_const and MOD_volatile. (FIXME) |
c906108c SS |
3138 | |
3139 | */ | |
3140 | ||
3141 | static struct type * | |
fba45db2 | 3142 | decode_modified_type (char *modifiers, unsigned int modcount, int mtype) |
c906108c SS |
3143 | { |
3144 | struct type *typep = NULL; | |
3145 | unsigned short fundtype; | |
3146 | DIE_REF die_ref; | |
3147 | char modifier; | |
3148 | int nbytes; | |
c5aa993b | 3149 | |
c906108c SS |
3150 | if (modcount == 0) |
3151 | { | |
3152 | switch (mtype) | |
3153 | { | |
3154 | case AT_mod_fund_type: | |
3155 | nbytes = attribute_size (AT_fund_type); | |
3156 | fundtype = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3157 | current_objfile); | |
3158 | typep = decode_fund_type (fundtype); | |
3159 | break; | |
3160 | case AT_mod_u_d_type: | |
3161 | nbytes = attribute_size (AT_user_def_type); | |
3162 | die_ref = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3163 | current_objfile); | |
b59661bd AC |
3164 | typep = lookup_utype (die_ref); |
3165 | if (typep == NULL) | |
c906108c SS |
3166 | { |
3167 | typep = alloc_utype (die_ref, NULL); | |
3168 | } | |
3169 | break; | |
3170 | default: | |
23136709 KB |
3171 | complaint (&symfile_complaints, |
3172 | "DIE @ 0x%x \"%s\", botched modified type decoding (mtype 0x%x)", | |
3173 | DIE_ID, DIE_NAME, mtype); | |
c906108c SS |
3174 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
3175 | break; | |
3176 | } | |
3177 | } | |
3178 | else | |
3179 | { | |
3180 | modifier = *modifiers++; | |
3181 | typep = decode_modified_type (modifiers, --modcount, mtype); | |
3182 | switch (modifier) | |
3183 | { | |
c5aa993b JM |
3184 | case MOD_pointer_to: |
3185 | typep = lookup_pointer_type (typep); | |
3186 | break; | |
3187 | case MOD_reference_to: | |
3188 | typep = lookup_reference_type (typep); | |
3189 | break; | |
3190 | case MOD_const: | |
23136709 KB |
3191 | complaint (&symfile_complaints, |
3192 | "DIE @ 0x%x \"%s\", type modifier 'const' ignored", DIE_ID, | |
3193 | DIE_NAME); /* FIXME */ | |
c5aa993b JM |
3194 | break; |
3195 | case MOD_volatile: | |
23136709 KB |
3196 | complaint (&symfile_complaints, |
3197 | "DIE @ 0x%x \"%s\", type modifier 'volatile' ignored", | |
3198 | DIE_ID, DIE_NAME); /* FIXME */ | |
c5aa993b JM |
3199 | break; |
3200 | default: | |
3cb3398d EZ |
3201 | if (!(MOD_lo_user <= (unsigned char) modifier)) |
3202 | #if 0 | |
3203 | /* This part of the test would always be true, and it triggers a compiler | |
3204 | warning. */ | |
c5aa993b | 3205 | && (unsigned char) modifier <= MOD_hi_user)) |
3cb3398d | 3206 | #endif |
c5aa993b | 3207 | { |
23136709 KB |
3208 | complaint (&symfile_complaints, |
3209 | "DIE @ 0x%x \"%s\", unknown type modifier %u", DIE_ID, | |
3210 | DIE_NAME, modifier); | |
c5aa993b JM |
3211 | } |
3212 | break; | |
c906108c SS |
3213 | } |
3214 | } | |
3215 | return (typep); | |
3216 | } | |
3217 | ||
3218 | /* | |
3219 | ||
c5aa993b | 3220 | LOCAL FUNCTION |
c906108c | 3221 | |
c5aa993b | 3222 | decode_fund_type -- translate basic DWARF type to gdb base type |
c906108c | 3223 | |
c5aa993b | 3224 | DESCRIPTION |
c906108c | 3225 | |
c5aa993b JM |
3226 | Given an integer that is one of the fundamental DWARF types, |
3227 | translate it to one of the basic internal gdb types and return | |
3228 | a pointer to the appropriate gdb type (a "struct type *"). | |
c906108c | 3229 | |
c5aa993b | 3230 | NOTES |
c906108c | 3231 | |
c5aa993b JM |
3232 | For robustness, if we are asked to translate a fundamental |
3233 | type that we are unprepared to deal with, we return int so | |
3234 | callers can always depend upon a valid type being returned, | |
3235 | and so gdb may at least do something reasonable by default. | |
3236 | If the type is not in the range of those types defined as | |
3237 | application specific types, we also issue a warning. | |
3238 | */ | |
c906108c SS |
3239 | |
3240 | static struct type * | |
fba45db2 | 3241 | decode_fund_type (unsigned int fundtype) |
c906108c SS |
3242 | { |
3243 | struct type *typep = NULL; | |
c5aa993b | 3244 | |
c906108c SS |
3245 | switch (fundtype) |
3246 | { | |
3247 | ||
3248 | case FT_void: | |
3249 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); | |
3250 | break; | |
c5aa993b | 3251 | |
c906108c SS |
3252 | case FT_boolean: /* Was FT_set in AT&T version */ |
3253 | typep = dwarf_fundamental_type (current_objfile, FT_BOOLEAN); | |
3254 | break; | |
3255 | ||
3256 | case FT_pointer: /* (void *) */ | |
3257 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); | |
3258 | typep = lookup_pointer_type (typep); | |
3259 | break; | |
c5aa993b | 3260 | |
c906108c SS |
3261 | case FT_char: |
3262 | typep = dwarf_fundamental_type (current_objfile, FT_CHAR); | |
3263 | break; | |
c5aa993b | 3264 | |
c906108c SS |
3265 | case FT_signed_char: |
3266 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_CHAR); | |
3267 | break; | |
3268 | ||
3269 | case FT_unsigned_char: | |
3270 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); | |
3271 | break; | |
c5aa993b | 3272 | |
c906108c SS |
3273 | case FT_short: |
3274 | typep = dwarf_fundamental_type (current_objfile, FT_SHORT); | |
3275 | break; | |
3276 | ||
3277 | case FT_signed_short: | |
3278 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_SHORT); | |
3279 | break; | |
c5aa993b | 3280 | |
c906108c SS |
3281 | case FT_unsigned_short: |
3282 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); | |
3283 | break; | |
c5aa993b | 3284 | |
c906108c SS |
3285 | case FT_integer: |
3286 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
3287 | break; | |
3288 | ||
3289 | case FT_signed_integer: | |
3290 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_INTEGER); | |
3291 | break; | |
c5aa993b | 3292 | |
c906108c SS |
3293 | case FT_unsigned_integer: |
3294 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); | |
3295 | break; | |
c5aa993b | 3296 | |
c906108c SS |
3297 | case FT_long: |
3298 | typep = dwarf_fundamental_type (current_objfile, FT_LONG); | |
3299 | break; | |
3300 | ||
3301 | case FT_signed_long: | |
3302 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG); | |
3303 | break; | |
c5aa993b | 3304 | |
c906108c SS |
3305 | case FT_unsigned_long: |
3306 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG); | |
3307 | break; | |
c5aa993b | 3308 | |
c906108c SS |
3309 | case FT_long_long: |
3310 | typep = dwarf_fundamental_type (current_objfile, FT_LONG_LONG); | |
3311 | break; | |
3312 | ||
3313 | case FT_signed_long_long: | |
3314 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG_LONG); | |
3315 | break; | |
3316 | ||
3317 | case FT_unsigned_long_long: | |
3318 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); | |
3319 | break; | |
3320 | ||
3321 | case FT_float: | |
3322 | typep = dwarf_fundamental_type (current_objfile, FT_FLOAT); | |
3323 | break; | |
c5aa993b | 3324 | |
c906108c SS |
3325 | case FT_dbl_prec_float: |
3326 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); | |
3327 | break; | |
c5aa993b | 3328 | |
c906108c SS |
3329 | case FT_ext_prec_float: |
3330 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); | |
3331 | break; | |
c5aa993b | 3332 | |
c906108c SS |
3333 | case FT_complex: |
3334 | typep = dwarf_fundamental_type (current_objfile, FT_COMPLEX); | |
3335 | break; | |
c5aa993b | 3336 | |
c906108c SS |
3337 | case FT_dbl_prec_complex: |
3338 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_COMPLEX); | |
3339 | break; | |
c5aa993b | 3340 | |
c906108c SS |
3341 | case FT_ext_prec_complex: |
3342 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_COMPLEX); | |
3343 | break; | |
c5aa993b | 3344 | |
c906108c SS |
3345 | } |
3346 | ||
3347 | if (typep == NULL) | |
3348 | { | |
3349 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); | |
3350 | if (!(FT_lo_user <= fundtype && fundtype <= FT_hi_user)) | |
3351 | { | |
23136709 KB |
3352 | complaint (&symfile_complaints, |
3353 | "DIE @ 0x%x \"%s\", unexpected fundamental type 0x%x", | |
3354 | DIE_ID, DIE_NAME, fundtype); | |
c906108c SS |
3355 | } |
3356 | } | |
c5aa993b | 3357 | |
c906108c SS |
3358 | return (typep); |
3359 | } | |
3360 | ||
3361 | /* | |
3362 | ||
c5aa993b | 3363 | LOCAL FUNCTION |
c906108c | 3364 | |
c5aa993b | 3365 | create_name -- allocate a fresh copy of a string on an obstack |
c906108c | 3366 | |
c5aa993b | 3367 | DESCRIPTION |
c906108c | 3368 | |
c5aa993b JM |
3369 | Given a pointer to a string and a pointer to an obstack, allocates |
3370 | a fresh copy of the string on the specified obstack. | |
c906108c | 3371 | |
c5aa993b | 3372 | */ |
c906108c SS |
3373 | |
3374 | static char * | |
fba45db2 | 3375 | create_name (char *name, struct obstack *obstackp) |
c906108c SS |
3376 | { |
3377 | int length; | |
3378 | char *newname; | |
3379 | ||
3380 | length = strlen (name) + 1; | |
3381 | newname = (char *) obstack_alloc (obstackp, length); | |
3382 | strcpy (newname, name); | |
3383 | return (newname); | |
3384 | } | |
3385 | ||
3386 | /* | |
3387 | ||
c5aa993b | 3388 | LOCAL FUNCTION |
c906108c | 3389 | |
c5aa993b | 3390 | basicdieinfo -- extract the minimal die info from raw die data |
c906108c | 3391 | |
c5aa993b | 3392 | SYNOPSIS |
c906108c | 3393 | |
c5aa993b JM |
3394 | void basicdieinfo (char *diep, struct dieinfo *dip, |
3395 | struct objfile *objfile) | |
c906108c | 3396 | |
c5aa993b | 3397 | DESCRIPTION |
c906108c | 3398 | |
c5aa993b JM |
3399 | Given a pointer to raw DIE data, and a pointer to an instance of a |
3400 | die info structure, this function extracts the basic information | |
3401 | from the DIE data required to continue processing this DIE, along | |
3402 | with some bookkeeping information about the DIE. | |
c906108c | 3403 | |
c5aa993b JM |
3404 | The information we absolutely must have includes the DIE tag, |
3405 | and the DIE length. If we need the sibling reference, then we | |
3406 | will have to call completedieinfo() to process all the remaining | |
3407 | DIE information. | |
c906108c | 3408 | |
c5aa993b JM |
3409 | Note that since there is no guarantee that the data is properly |
3410 | aligned in memory for the type of access required (indirection | |
3411 | through anything other than a char pointer), and there is no | |
3412 | guarantee that it is in the same byte order as the gdb host, | |
3413 | we call a function which deals with both alignment and byte | |
3414 | swapping issues. Possibly inefficient, but quite portable. | |
c906108c | 3415 | |
c5aa993b JM |
3416 | We also take care of some other basic things at this point, such |
3417 | as ensuring that the instance of the die info structure starts | |
3418 | out completely zero'd and that curdie is initialized for use | |
3419 | in error reporting if we have a problem with the current die. | |
c906108c | 3420 | |
c5aa993b JM |
3421 | NOTES |
3422 | ||
3423 | All DIE's must have at least a valid length, thus the minimum | |
3424 | DIE size is SIZEOF_DIE_LENGTH. In order to have a valid tag, the | |
3425 | DIE size must be at least SIZEOF_DIE_TAG larger, otherwise they | |
3426 | are forced to be TAG_padding DIES. | |
c906108c | 3427 | |
c5aa993b JM |
3428 | Padding DIES must be at least SIZEOF_DIE_LENGTH in length, implying |
3429 | that if a padding DIE is used for alignment and the amount needed is | |
3430 | less than SIZEOF_DIE_LENGTH, then the padding DIE has to be big | |
3431 | enough to align to the next alignment boundry. | |
3432 | ||
3433 | We do some basic sanity checking here, such as verifying that the | |
3434 | length of the die would not cause it to overrun the recorded end of | |
3435 | the buffer holding the DIE info. If we find a DIE that is either | |
3436 | too small or too large, we force it's length to zero which should | |
3437 | cause the caller to take appropriate action. | |
c906108c SS |
3438 | */ |
3439 | ||
3440 | static void | |
fba45db2 | 3441 | basicdieinfo (struct dieinfo *dip, char *diep, struct objfile *objfile) |
c906108c SS |
3442 | { |
3443 | curdie = dip; | |
3444 | memset (dip, 0, sizeof (struct dieinfo)); | |
c5aa993b JM |
3445 | dip->die = diep; |
3446 | dip->die_ref = dbroff + (diep - dbbase); | |
3447 | dip->die_length = target_to_host (diep, SIZEOF_DIE_LENGTH, GET_UNSIGNED, | |
3448 | objfile); | |
3449 | if ((dip->die_length < SIZEOF_DIE_LENGTH) || | |
3450 | ((diep + dip->die_length) > (dbbase + dbsize))) | |
c906108c | 3451 | { |
23136709 KB |
3452 | complaint (&symfile_complaints, |
3453 | "DIE @ 0x%x \"%s\", malformed DIE, bad length (%ld bytes)", | |
3454 | DIE_ID, DIE_NAME, dip->die_length); | |
c5aa993b | 3455 | dip->die_length = 0; |
c906108c | 3456 | } |
c5aa993b | 3457 | else if (dip->die_length < (SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG)) |
c906108c | 3458 | { |
c5aa993b | 3459 | dip->die_tag = TAG_padding; |
c906108c SS |
3460 | } |
3461 | else | |
3462 | { | |
3463 | diep += SIZEOF_DIE_LENGTH; | |
c5aa993b JM |
3464 | dip->die_tag = target_to_host (diep, SIZEOF_DIE_TAG, GET_UNSIGNED, |
3465 | objfile); | |
c906108c SS |
3466 | } |
3467 | } | |
3468 | ||
3469 | /* | |
3470 | ||
c5aa993b | 3471 | LOCAL FUNCTION |
c906108c | 3472 | |
c5aa993b | 3473 | completedieinfo -- finish reading the information for a given DIE |
c906108c | 3474 | |
c5aa993b | 3475 | SYNOPSIS |
c906108c | 3476 | |
c5aa993b | 3477 | void completedieinfo (struct dieinfo *dip, struct objfile *objfile) |
c906108c | 3478 | |
c5aa993b | 3479 | DESCRIPTION |
c906108c | 3480 | |
c5aa993b JM |
3481 | Given a pointer to an already partially initialized die info structure, |
3482 | scan the raw DIE data and finish filling in the die info structure | |
3483 | from the various attributes found. | |
c906108c | 3484 | |
c5aa993b JM |
3485 | Note that since there is no guarantee that the data is properly |
3486 | aligned in memory for the type of access required (indirection | |
3487 | through anything other than a char pointer), and there is no | |
3488 | guarantee that it is in the same byte order as the gdb host, | |
3489 | we call a function which deals with both alignment and byte | |
3490 | swapping issues. Possibly inefficient, but quite portable. | |
c906108c | 3491 | |
c5aa993b JM |
3492 | NOTES |
3493 | ||
3494 | Each time we are called, we increment the diecount variable, which | |
3495 | keeps an approximate count of the number of dies processed for | |
3496 | each compilation unit. This information is presented to the user | |
3497 | if the info_verbose flag is set. | |
c906108c SS |
3498 | |
3499 | */ | |
3500 | ||
3501 | static void | |
fba45db2 | 3502 | completedieinfo (struct dieinfo *dip, struct objfile *objfile) |
c906108c SS |
3503 | { |
3504 | char *diep; /* Current pointer into raw DIE data */ | |
3505 | char *end; /* Terminate DIE scan here */ | |
3506 | unsigned short attr; /* Current attribute being scanned */ | |
3507 | unsigned short form; /* Form of the attribute */ | |
3508 | int nbytes; /* Size of next field to read */ | |
c5aa993b | 3509 | |
c906108c | 3510 | diecount++; |
c5aa993b JM |
3511 | diep = dip->die; |
3512 | end = diep + dip->die_length; | |
c906108c SS |
3513 | diep += SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG; |
3514 | while (diep < end) | |
3515 | { | |
3516 | attr = target_to_host (diep, SIZEOF_ATTRIBUTE, GET_UNSIGNED, objfile); | |
3517 | diep += SIZEOF_ATTRIBUTE; | |
b59661bd AC |
3518 | nbytes = attribute_size (attr); |
3519 | if (nbytes == -1) | |
c906108c | 3520 | { |
23136709 KB |
3521 | complaint (&symfile_complaints, |
3522 | "DIE @ 0x%x \"%s\", unknown attribute length, skipped remaining attributes", | |
3523 | DIE_ID, DIE_NAME); | |
c906108c SS |
3524 | diep = end; |
3525 | continue; | |
3526 | } | |
3527 | switch (attr) | |
3528 | { | |
3529 | case AT_fund_type: | |
c5aa993b JM |
3530 | dip->at_fund_type = target_to_host (diep, nbytes, GET_UNSIGNED, |
3531 | objfile); | |
c906108c SS |
3532 | break; |
3533 | case AT_ordering: | |
c5aa993b JM |
3534 | dip->at_ordering = target_to_host (diep, nbytes, GET_UNSIGNED, |
3535 | objfile); | |
c906108c SS |
3536 | break; |
3537 | case AT_bit_offset: | |
c5aa993b JM |
3538 | dip->at_bit_offset = target_to_host (diep, nbytes, GET_UNSIGNED, |
3539 | objfile); | |
c906108c SS |
3540 | break; |
3541 | case AT_sibling: | |
c5aa993b JM |
3542 | dip->at_sibling = target_to_host (diep, nbytes, GET_UNSIGNED, |
3543 | objfile); | |
c906108c SS |
3544 | break; |
3545 | case AT_stmt_list: | |
c5aa993b JM |
3546 | dip->at_stmt_list = target_to_host (diep, nbytes, GET_UNSIGNED, |
3547 | objfile); | |
3548 | dip->has_at_stmt_list = 1; | |
c906108c SS |
3549 | break; |
3550 | case AT_low_pc: | |
c5aa993b JM |
3551 | dip->at_low_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3552 | objfile); | |
3553 | dip->at_low_pc += baseaddr; | |
3554 | dip->has_at_low_pc = 1; | |
c906108c SS |
3555 | break; |
3556 | case AT_high_pc: | |
c5aa993b JM |
3557 | dip->at_high_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3558 | objfile); | |
3559 | dip->at_high_pc += baseaddr; | |
c906108c SS |
3560 | break; |
3561 | case AT_language: | |
c5aa993b JM |
3562 | dip->at_language = target_to_host (diep, nbytes, GET_UNSIGNED, |
3563 | objfile); | |
c906108c SS |
3564 | break; |
3565 | case AT_user_def_type: | |
c5aa993b JM |
3566 | dip->at_user_def_type = target_to_host (diep, nbytes, |
3567 | GET_UNSIGNED, objfile); | |
c906108c SS |
3568 | break; |
3569 | case AT_byte_size: | |
c5aa993b JM |
3570 | dip->at_byte_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3571 | objfile); | |
3572 | dip->has_at_byte_size = 1; | |
c906108c SS |
3573 | break; |
3574 | case AT_bit_size: | |
c5aa993b JM |
3575 | dip->at_bit_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3576 | objfile); | |
c906108c SS |
3577 | break; |
3578 | case AT_member: | |
c5aa993b JM |
3579 | dip->at_member = target_to_host (diep, nbytes, GET_UNSIGNED, |
3580 | objfile); | |
c906108c SS |
3581 | break; |
3582 | case AT_discr: | |
c5aa993b JM |
3583 | dip->at_discr = target_to_host (diep, nbytes, GET_UNSIGNED, |
3584 | objfile); | |
c906108c SS |
3585 | break; |
3586 | case AT_location: | |
c5aa993b | 3587 | dip->at_location = diep; |
c906108c SS |
3588 | break; |
3589 | case AT_mod_fund_type: | |
c5aa993b | 3590 | dip->at_mod_fund_type = diep; |
c906108c SS |
3591 | break; |
3592 | case AT_subscr_data: | |
c5aa993b | 3593 | dip->at_subscr_data = diep; |
c906108c SS |
3594 | break; |
3595 | case AT_mod_u_d_type: | |
c5aa993b | 3596 | dip->at_mod_u_d_type = diep; |
c906108c SS |
3597 | break; |
3598 | case AT_element_list: | |
c5aa993b JM |
3599 | dip->at_element_list = diep; |
3600 | dip->short_element_list = 0; | |
c906108c SS |
3601 | break; |
3602 | case AT_short_element_list: | |
c5aa993b JM |
3603 | dip->at_element_list = diep; |
3604 | dip->short_element_list = 1; | |
c906108c SS |
3605 | break; |
3606 | case AT_discr_value: | |
c5aa993b | 3607 | dip->at_discr_value = diep; |
c906108c SS |
3608 | break; |
3609 | case AT_string_length: | |
c5aa993b | 3610 | dip->at_string_length = diep; |
c906108c SS |
3611 | break; |
3612 | case AT_name: | |
c5aa993b | 3613 | dip->at_name = diep; |
c906108c SS |
3614 | break; |
3615 | case AT_comp_dir: | |
3616 | /* For now, ignore any "hostname:" portion, since gdb doesn't | |
3617 | know how to deal with it. (FIXME). */ | |
c5aa993b JM |
3618 | dip->at_comp_dir = strrchr (diep, ':'); |
3619 | if (dip->at_comp_dir != NULL) | |
c906108c | 3620 | { |
c5aa993b | 3621 | dip->at_comp_dir++; |
c906108c SS |
3622 | } |
3623 | else | |
3624 | { | |
c5aa993b | 3625 | dip->at_comp_dir = diep; |
c906108c SS |
3626 | } |
3627 | break; | |
3628 | case AT_producer: | |
c5aa993b | 3629 | dip->at_producer = diep; |
c906108c SS |
3630 | break; |
3631 | case AT_start_scope: | |
c5aa993b JM |
3632 | dip->at_start_scope = target_to_host (diep, nbytes, GET_UNSIGNED, |
3633 | objfile); | |
c906108c SS |
3634 | break; |
3635 | case AT_stride_size: | |
c5aa993b JM |
3636 | dip->at_stride_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3637 | objfile); | |
c906108c SS |
3638 | break; |
3639 | case AT_src_info: | |
c5aa993b JM |
3640 | dip->at_src_info = target_to_host (diep, nbytes, GET_UNSIGNED, |
3641 | objfile); | |
c906108c SS |
3642 | break; |
3643 | case AT_prototyped: | |
c5aa993b | 3644 | dip->at_prototyped = diep; |
c906108c SS |
3645 | break; |
3646 | default: | |
3647 | /* Found an attribute that we are unprepared to handle. However | |
3648 | it is specifically one of the design goals of DWARF that | |
3649 | consumers should ignore unknown attributes. As long as the | |
3650 | form is one that we recognize (so we know how to skip it), | |
3651 | we can just ignore the unknown attribute. */ | |
3652 | break; | |
3653 | } | |
3654 | form = FORM_FROM_ATTR (attr); | |
3655 | switch (form) | |
3656 | { | |
3657 | case FORM_DATA2: | |
3658 | diep += 2; | |
3659 | break; | |
3660 | case FORM_DATA4: | |
3661 | case FORM_REF: | |
3662 | diep += 4; | |
3663 | break; | |
3664 | case FORM_DATA8: | |
3665 | diep += 8; | |
3666 | break; | |
3667 | case FORM_ADDR: | |
3668 | diep += TARGET_FT_POINTER_SIZE (objfile); | |
3669 | break; | |
3670 | case FORM_BLOCK2: | |
3671 | diep += 2 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); | |
3672 | break; | |
3673 | case FORM_BLOCK4: | |
3674 | diep += 4 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); | |
3675 | break; | |
3676 | case FORM_STRING: | |
3677 | diep += strlen (diep) + 1; | |
3678 | break; | |
3679 | default: | |
23136709 | 3680 | unknown_attribute_form_complaint (DIE_ID, DIE_NAME, form); |
c906108c SS |
3681 | diep = end; |
3682 | break; | |
3683 | } | |
3684 | } | |
3685 | } | |
3686 | ||
3687 | /* | |
3688 | ||
c5aa993b | 3689 | LOCAL FUNCTION |
c906108c | 3690 | |
c5aa993b | 3691 | target_to_host -- swap in target data to host |
c906108c | 3692 | |
c5aa993b | 3693 | SYNOPSIS |
c906108c | 3694 | |
c5aa993b JM |
3695 | target_to_host (char *from, int nbytes, int signextend, |
3696 | struct objfile *objfile) | |
c906108c | 3697 | |
c5aa993b | 3698 | DESCRIPTION |
c906108c | 3699 | |
c5aa993b JM |
3700 | Given pointer to data in target format in FROM, a byte count for |
3701 | the size of the data in NBYTES, a flag indicating whether or not | |
3702 | the data is signed in SIGNEXTEND, and a pointer to the current | |
3703 | objfile in OBJFILE, convert the data to host format and return | |
3704 | the converted value. | |
c906108c | 3705 | |
c5aa993b | 3706 | NOTES |
c906108c | 3707 | |
c5aa993b JM |
3708 | FIXME: If we read data that is known to be signed, and expect to |
3709 | use it as signed data, then we need to explicitly sign extend the | |
3710 | result until the bfd library is able to do this for us. | |
c906108c | 3711 | |
c5aa993b | 3712 | FIXME: Would a 32 bit target ever need an 8 byte result? |
c906108c SS |
3713 | |
3714 | */ | |
3715 | ||
3716 | static CORE_ADDR | |
fba45db2 KB |
3717 | target_to_host (char *from, int nbytes, int signextend, /* FIXME: Unused */ |
3718 | struct objfile *objfile) | |
c906108c SS |
3719 | { |
3720 | CORE_ADDR rtnval; | |
3721 | ||
3722 | switch (nbytes) | |
3723 | { | |
c5aa993b JM |
3724 | case 8: |
3725 | rtnval = bfd_get_64 (objfile->obfd, (bfd_byte *) from); | |
3726 | break; | |
3727 | case 4: | |
3728 | rtnval = bfd_get_32 (objfile->obfd, (bfd_byte *) from); | |
3729 | break; | |
3730 | case 2: | |
3731 | rtnval = bfd_get_16 (objfile->obfd, (bfd_byte *) from); | |
3732 | break; | |
3733 | case 1: | |
3734 | rtnval = bfd_get_8 (objfile->obfd, (bfd_byte *) from); | |
3735 | break; | |
3736 | default: | |
23136709 KB |
3737 | complaint (&symfile_complaints, |
3738 | "DIE @ 0x%x \"%s\", no bfd support for %d byte data object", | |
3739 | DIE_ID, DIE_NAME, nbytes); | |
c5aa993b JM |
3740 | rtnval = 0; |
3741 | break; | |
c906108c SS |
3742 | } |
3743 | return (rtnval); | |
3744 | } | |
3745 | ||
3746 | /* | |
3747 | ||
c5aa993b | 3748 | LOCAL FUNCTION |
c906108c | 3749 | |
c5aa993b | 3750 | attribute_size -- compute size of data for a DWARF attribute |
c906108c | 3751 | |
c5aa993b | 3752 | SYNOPSIS |
c906108c | 3753 | |
c5aa993b | 3754 | static int attribute_size (unsigned int attr) |
c906108c | 3755 | |
c5aa993b | 3756 | DESCRIPTION |
c906108c | 3757 | |
c5aa993b JM |
3758 | Given a DWARF attribute in ATTR, compute the size of the first |
3759 | piece of data associated with this attribute and return that | |
3760 | size. | |
c906108c | 3761 | |
c5aa993b | 3762 | Returns -1 for unrecognized attributes. |
c906108c SS |
3763 | |
3764 | */ | |
3765 | ||
3766 | static int | |
fba45db2 | 3767 | attribute_size (unsigned int attr) |
c906108c SS |
3768 | { |
3769 | int nbytes; /* Size of next data for this attribute */ | |
3770 | unsigned short form; /* Form of the attribute */ | |
3771 | ||
3772 | form = FORM_FROM_ATTR (attr); | |
3773 | switch (form) | |
3774 | { | |
c5aa993b JM |
3775 | case FORM_STRING: /* A variable length field is next */ |
3776 | nbytes = 0; | |
3777 | break; | |
3778 | case FORM_DATA2: /* Next 2 byte field is the data itself */ | |
3779 | case FORM_BLOCK2: /* Next 2 byte field is a block length */ | |
3780 | nbytes = 2; | |
3781 | break; | |
3782 | case FORM_DATA4: /* Next 4 byte field is the data itself */ | |
3783 | case FORM_BLOCK4: /* Next 4 byte field is a block length */ | |
3784 | case FORM_REF: /* Next 4 byte field is a DIE offset */ | |
3785 | nbytes = 4; | |
3786 | break; | |
3787 | case FORM_DATA8: /* Next 8 byte field is the data itself */ | |
3788 | nbytes = 8; | |
3789 | break; | |
3790 | case FORM_ADDR: /* Next field size is target sizeof(void *) */ | |
3791 | nbytes = TARGET_FT_POINTER_SIZE (objfile); | |
3792 | break; | |
3793 | default: | |
23136709 | 3794 | unknown_attribute_form_complaint (DIE_ID, DIE_NAME, form); |
c5aa993b JM |
3795 | nbytes = -1; |
3796 | break; | |
3797 | } | |
c906108c SS |
3798 | return (nbytes); |
3799 | } |