Commit | Line | Data |
---|---|---|
35f5886e | 1 | /* DWARF debugging format support for GDB. |
1ab3bf1b JG |
2 | Copyright (C) 1991, 1992 Free Software Foundation, Inc. |
3 | Written by Fred Fish at Cygnus Support. Portions based on dbxread.c, | |
35f5886e FF |
4 | mipsread.c, coffread.c, and dwarfread.c from a Data General SVR4 gdb port. |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
21 | ||
22 | /* | |
23 | ||
24 | FIXME: Figure out how to get the frame pointer register number in the | |
25 | execution environment of the target. Remove R_FP kludge | |
26 | ||
27 | FIXME: Add generation of dependencies list to partial symtab code. | |
28 | ||
35f5886e FF |
29 | FIXME: Resolve minor differences between what information we put in the |
30 | partial symbol table and what dbxread puts in. For example, we don't yet | |
31 | put enum constants there. And dbxread seems to invent a lot of typedefs | |
32 | we never see. Use the new printpsym command to see the partial symbol table | |
33 | contents. | |
34 | ||
35f5886e FF |
35 | FIXME: Figure out a better way to tell gdb about the name of the function |
36 | contain the user's entry point (I.E. main()) | |
37 | ||
35f5886e FF |
38 | FIXME: See other FIXME's and "ifdef 0" scattered throughout the code for |
39 | other things to work on, if you get bored. :-) | |
40 | ||
41 | */ | |
4d315a07 | 42 | |
d747e0af | 43 | #include "defs.h" |
35f5886e FF |
44 | #include "bfd.h" |
45 | #include "symtab.h" | |
1ab3bf1b | 46 | #include "gdbtypes.h" |
35f5886e | 47 | #include "symfile.h" |
5e2e79f8 | 48 | #include "objfiles.h" |
13b5a7ff | 49 | #include "libbfd.h" /* FIXME Secret Internal BFD stuff (bfd_read) */ |
f5f0679a | 50 | #include "elf/dwarf.h" |
4d315a07 | 51 | #include "buildsym.h" |
2dbde378 | 52 | #include "demangle.h" |
bf229b4e FF |
53 | #include "expression.h" /* Needed for enum exp_opcode in language.h, sigh... */ |
54 | #include "language.h" | |
35f5886e | 55 | |
d5931d79 JG |
56 | #include <varargs.h> |
57 | #include <fcntl.h> | |
58 | #include <string.h> | |
603900c7 | 59 | #include <sys/types.h> |
d5931d79 JG |
60 | #ifndef NO_SYS_FILE |
61 | #include <sys/file.h> | |
62 | #endif | |
63 | ||
64 | /* FIXME -- convert this to SEEK_SET a la POSIX, move to config files. */ | |
65 | #ifndef L_SET | |
66 | #define L_SET 0 | |
67 | #endif | |
68 | ||
35f5886e FF |
69 | #ifdef MAINTENANCE /* Define to 1 to compile in some maintenance stuff */ |
70 | #define SQUAWK(stuff) dwarfwarn stuff | |
71 | #else | |
72 | #define SQUAWK(stuff) | |
73 | #endif | |
74 | ||
75 | #ifndef R_FP /* FIXME */ | |
76 | #define R_FP 14 /* Kludge to get frame pointer register number */ | |
77 | #endif | |
78 | ||
13b5a7ff | 79 | typedef unsigned int DIE_REF; /* Reference to a DIE */ |
35f5886e | 80 | |
4d315a07 FF |
81 | #ifndef GCC_PRODUCER |
82 | #define GCC_PRODUCER "GNU C " | |
83 | #endif | |
35f5886e | 84 | |
2dbde378 FF |
85 | #ifndef GPLUS_PRODUCER |
86 | #define GPLUS_PRODUCER "GNU C++ " | |
87 | #endif | |
88 | ||
89 | #ifndef LCC_PRODUCER | |
3dc755fb | 90 | #define LCC_PRODUCER "NCR C/C++" |
2dbde378 FF |
91 | #endif |
92 | ||
93 | #ifndef CFRONT_PRODUCER | |
94 | #define CFRONT_PRODUCER "CFRONT " /* A wild a** guess... */ | |
95 | #endif | |
96 | ||
93bb6e65 FF |
97 | /* start-sanitize-chill */ |
98 | #ifndef CHILL_PRODUCER | |
99 | #define CHILL_PRODUCER "GNU Chill " | |
100 | #endif | |
101 | /* end-sanitize-chill */ | |
102 | ||
35f5886e | 103 | #define STREQ(a,b) (strcmp(a,b)==0) |
4d315a07 | 104 | #define STREQN(a,b,n) (strncmp(a,b,n)==0) |
35f5886e | 105 | |
13b5a7ff FF |
106 | /* Flags to target_to_host() that tell whether or not the data object is |
107 | expected to be signed. Used, for example, when fetching a signed | |
108 | integer in the target environment which is used as a signed integer | |
109 | in the host environment, and the two environments have different sized | |
110 | ints. In this case, *somebody* has to sign extend the smaller sized | |
111 | int. */ | |
112 | ||
113 | #define GET_UNSIGNED 0 /* No sign extension required */ | |
114 | #define GET_SIGNED 1 /* Sign extension required */ | |
115 | ||
116 | /* Defines for things which are specified in the document "DWARF Debugging | |
117 | Information Format" published by UNIX International, Programming Languages | |
118 | SIG. These defines are based on revision 1.0.0, Jan 20, 1992. */ | |
119 | ||
120 | #define SIZEOF_DIE_LENGTH 4 | |
121 | #define SIZEOF_DIE_TAG 2 | |
122 | #define SIZEOF_ATTRIBUTE 2 | |
123 | #define SIZEOF_FORMAT_SPECIFIER 1 | |
124 | #define SIZEOF_FMT_FT 2 | |
125 | #define SIZEOF_LINETBL_LENGTH 4 | |
126 | #define SIZEOF_LINETBL_LINENO 4 | |
127 | #define SIZEOF_LINETBL_STMT 2 | |
128 | #define SIZEOF_LINETBL_DELTA 4 | |
129 | #define SIZEOF_LOC_ATOM_CODE 1 | |
130 | ||
131 | #define FORM_FROM_ATTR(attr) ((attr) & 0xF) /* Implicitly specified */ | |
132 | ||
133 | /* Macros that return the sizes of various types of data in the target | |
134 | environment. | |
135 | ||
2d6d969c FF |
136 | FIXME: Currently these are just compile time constants (as they are in |
137 | other parts of gdb as well). They need to be able to get the right size | |
138 | either from the bfd or possibly from the DWARF info. It would be nice if | |
139 | the DWARF producer inserted DIES that describe the fundamental types in | |
140 | the target environment into the DWARF info, similar to the way dbx stabs | |
141 | producers produce information about their fundamental types. */ | |
142 | ||
143 | #define TARGET_FT_POINTER_SIZE(objfile) (TARGET_PTR_BIT / TARGET_CHAR_BIT) | |
144 | #define TARGET_FT_LONG_SIZE(objfile) (TARGET_LONG_BIT / TARGET_CHAR_BIT) | |
95967e73 | 145 | |
768be6e1 FF |
146 | /* The Amiga SVR4 header file <dwarf.h> defines AT_element_list as a |
147 | FORM_BLOCK2, and this is the value emitted by the AT&T compiler. | |
148 | However, the Issue 2 DWARF specification from AT&T defines it as | |
149 | a FORM_BLOCK4, as does the latest specification from UI/PLSIG. | |
150 | For backwards compatibility with the AT&T compiler produced executables | |
151 | we define AT_short_element_list for this variant. */ | |
152 | ||
153 | #define AT_short_element_list (0x00f0|FORM_BLOCK2) | |
154 | ||
155 | /* External variables referenced. */ | |
156 | ||
35f5886e | 157 | extern int info_verbose; /* From main.c; nonzero => verbose */ |
318bf84f | 158 | extern char *warning_pre_print; /* From utils.c */ |
35f5886e FF |
159 | |
160 | /* The DWARF debugging information consists of two major pieces, | |
161 | one is a block of DWARF Information Entries (DIE's) and the other | |
162 | is a line number table. The "struct dieinfo" structure contains | |
163 | the information for a single DIE, the one currently being processed. | |
164 | ||
165 | In order to make it easier to randomly access the attribute fields | |
13b5a7ff | 166 | of the current DIE, which are specifically unordered within the DIE, |
35f5886e FF |
167 | each DIE is scanned and an instance of the "struct dieinfo" |
168 | structure is initialized. | |
169 | ||
170 | Initialization is done in two levels. The first, done by basicdieinfo(), | |
171 | just initializes those fields that are vital to deciding whether or not | |
172 | to use this DIE, how to skip past it, etc. The second, done by the | |
173 | function completedieinfo(), fills in the rest of the information. | |
174 | ||
175 | Attributes which have block forms are not interpreted at the time | |
176 | the DIE is scanned, instead we just save pointers to the start | |
177 | of their value fields. | |
178 | ||
179 | Some fields have a flag <name>_p that is set when the value of the | |
180 | field is valid (I.E. we found a matching attribute in the DIE). Since | |
181 | we may want to test for the presence of some attributes in the DIE, | |
2d6186f4 | 182 | such as AT_low_pc, without restricting the values of the field, |
35f5886e FF |
183 | we need someway to note that we found such an attribute. |
184 | ||
185 | */ | |
186 | ||
187 | typedef char BLOCK; | |
188 | ||
189 | struct dieinfo { | |
13b5a7ff FF |
190 | char * die; /* Pointer to the raw DIE data */ |
191 | unsigned long die_length; /* Length of the raw DIE data */ | |
192 | DIE_REF die_ref; /* Offset of this DIE */ | |
193 | unsigned short die_tag; /* Tag for this DIE */ | |
194 | unsigned long at_padding; | |
195 | unsigned long at_sibling; | |
196 | BLOCK * at_location; | |
197 | char * at_name; | |
198 | unsigned short at_fund_type; | |
199 | BLOCK * at_mod_fund_type; | |
200 | unsigned long at_user_def_type; | |
201 | BLOCK * at_mod_u_d_type; | |
202 | unsigned short at_ordering; | |
203 | BLOCK * at_subscr_data; | |
204 | unsigned long at_byte_size; | |
205 | unsigned short at_bit_offset; | |
206 | unsigned long at_bit_size; | |
207 | BLOCK * at_element_list; | |
208 | unsigned long at_stmt_list; | |
209 | unsigned long at_low_pc; | |
210 | unsigned long at_high_pc; | |
211 | unsigned long at_language; | |
212 | unsigned long at_member; | |
213 | unsigned long at_discr; | |
214 | BLOCK * at_discr_value; | |
13b5a7ff FF |
215 | BLOCK * at_string_length; |
216 | char * at_comp_dir; | |
217 | char * at_producer; | |
13b5a7ff FF |
218 | unsigned long at_start_scope; |
219 | unsigned long at_stride_size; | |
220 | unsigned long at_src_info; | |
221 | char * at_prototyped; | |
222 | unsigned int has_at_low_pc:1; | |
223 | unsigned int has_at_stmt_list:1; | |
50055e94 | 224 | unsigned int has_at_byte_size:1; |
13b5a7ff | 225 | unsigned int short_element_list:1; |
35f5886e FF |
226 | }; |
227 | ||
228 | static int diecount; /* Approximate count of dies for compilation unit */ | |
229 | static struct dieinfo *curdie; /* For warnings and such */ | |
230 | ||
231 | static char *dbbase; /* Base pointer to dwarf info */ | |
4090fe1c | 232 | static int dbsize; /* Size of dwarf info in bytes */ |
35f5886e FF |
233 | static int dbroff; /* Relative offset from start of .debug section */ |
234 | static char *lnbase; /* Base pointer to line section */ | |
235 | static int isreg; /* Kludge to identify register variables */ | |
a5bd5ba6 | 236 | static int offreg; /* Kludge to identify basereg references */ |
35f5886e | 237 | |
2670f34d JG |
238 | /* This value is added to each symbol value. FIXME: Generalize to |
239 | the section_offsets structure used by dbxread. */ | |
35f5886e FF |
240 | static CORE_ADDR baseaddr; /* Add to each symbol value */ |
241 | ||
2670f34d JG |
242 | /* The section offsets used in the current psymtab or symtab. FIXME, |
243 | only used to pass one value (baseaddr) at the moment. */ | |
244 | static struct section_offsets *base_section_offsets; | |
245 | ||
35f5886e FF |
246 | /* Each partial symbol table entry contains a pointer to private data for the |
247 | read_symtab() function to use when expanding a partial symbol table entry | |
248 | to a full symbol table entry. For DWARF debugging info, this data is | |
249 | contained in the following structure and macros are provided for easy | |
250 | access to the members given a pointer to a partial symbol table entry. | |
251 | ||
252 | dbfoff Always the absolute file offset to the start of the ".debug" | |
253 | section for the file containing the DIE's being accessed. | |
254 | ||
255 | dbroff Relative offset from the start of the ".debug" access to the | |
256 | first DIE to be accessed. When building the partial symbol | |
257 | table, this value will be zero since we are accessing the | |
258 | entire ".debug" section. When expanding a partial symbol | |
259 | table entry, this value will be the offset to the first | |
260 | DIE for the compilation unit containing the symbol that | |
261 | triggers the expansion. | |
262 | ||
263 | dblength The size of the chunk of DIE's being examined, in bytes. | |
264 | ||
265 | lnfoff The absolute file offset to the line table fragment. Ignored | |
266 | when building partial symbol tables, but used when expanding | |
267 | them, and contains the absolute file offset to the fragment | |
268 | of the ".line" section containing the line numbers for the | |
269 | current compilation unit. | |
270 | */ | |
271 | ||
272 | struct dwfinfo { | |
d5931d79 | 273 | file_ptr dbfoff; /* Absolute file offset to start of .debug section */ |
35f5886e FF |
274 | int dbroff; /* Relative offset from start of .debug section */ |
275 | int dblength; /* Size of the chunk of DIE's being examined */ | |
d5931d79 | 276 | file_ptr lnfoff; /* Absolute file offset to line table fragment */ |
35f5886e FF |
277 | }; |
278 | ||
279 | #define DBFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbfoff) | |
280 | #define DBROFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbroff) | |
281 | #define DBLENGTH(p) (((struct dwfinfo *)((p)->read_symtab_private))->dblength) | |
282 | #define LNFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->lnfoff) | |
283 | ||
4d315a07 FF |
284 | /* The generic symbol table building routines have separate lists for |
285 | file scope symbols and all all other scopes (local scopes). So | |
286 | we need to select the right one to pass to add_symbol_to_list(). | |
287 | We do it by keeping a pointer to the correct list in list_in_scope. | |
35f5886e | 288 | |
4d315a07 FF |
289 | FIXME: The original dwarf code just treated the file scope as the first |
290 | local scope, and all other local scopes as nested local scopes, and worked | |
291 | fine. Check to see if we really need to distinguish these in buildsym.c */ | |
35f5886e | 292 | |
99140c31 | 293 | struct pending **list_in_scope = &file_symbols; |
35f5886e FF |
294 | |
295 | /* DIES which have user defined types or modified user defined types refer to | |
296 | other DIES for the type information. Thus we need to associate the offset | |
297 | of a DIE for a user defined type with a pointer to the type information. | |
298 | ||
299 | Originally this was done using a simple but expensive algorithm, with an | |
300 | array of unsorted structures, each containing an offset/type-pointer pair. | |
301 | This array was scanned linearly each time a lookup was done. The result | |
302 | was that gdb was spending over half it's startup time munging through this | |
303 | array of pointers looking for a structure that had the right offset member. | |
304 | ||
305 | The second attempt used the same array of structures, but the array was | |
306 | sorted using qsort each time a new offset/type was recorded, and a binary | |
307 | search was used to find the type pointer for a given DIE offset. This was | |
308 | even slower, due to the overhead of sorting the array each time a new | |
309 | offset/type pair was entered. | |
310 | ||
311 | The third attempt uses a fixed size array of type pointers, indexed by a | |
312 | value derived from the DIE offset. Since the minimum DIE size is 4 bytes, | |
313 | we can divide any DIE offset by 4 to obtain a unique index into this fixed | |
314 | size array. Since each element is a 4 byte pointer, it takes exactly as | |
315 | much memory to hold this array as to hold the DWARF info for a given | |
bf229b4e FF |
316 | compilation unit. But it gets freed as soon as we are done with it. |
317 | This has worked well in practice, as a reasonable tradeoff between memory | |
318 | consumption and speed, without having to resort to much more complicated | |
319 | algorithms. */ | |
35f5886e FF |
320 | |
321 | static struct type **utypes; /* Pointer to array of user type pointers */ | |
322 | static int numutypes; /* Max number of user type pointers */ | |
323 | ||
bf229b4e FF |
324 | /* Maintain an array of referenced fundamental types for the current |
325 | compilation unit being read. For DWARF version 1, we have to construct | |
326 | the fundamental types on the fly, since no information about the | |
327 | fundamental types is supplied. Each such fundamental type is created by | |
328 | calling a language dependent routine to create the type, and then a | |
329 | pointer to that type is then placed in the array at the index specified | |
330 | by it's FT_<TYPENAME> value. The array has a fixed size set by the | |
331 | FT_NUM_MEMBERS compile time constant, which is the number of predefined | |
332 | fundamental types gdb knows how to construct. */ | |
333 | ||
334 | static struct type *ftypes[FT_NUM_MEMBERS]; /* Fundamental types */ | |
335 | ||
95ff889e FF |
336 | /* Record the language for the compilation unit which is currently being |
337 | processed. We know it once we have seen the TAG_compile_unit DIE, | |
338 | and we need it while processing the DIE's for that compilation unit. | |
339 | It is eventually saved in the symtab structure, but we don't finalize | |
340 | the symtab struct until we have processed all the DIE's for the | |
bf229b4e FF |
341 | compilation unit. We also need to get and save a pointer to the |
342 | language struct for this language, so we can call the language | |
343 | dependent routines for doing things such as creating fundamental | |
344 | types. */ | |
95ff889e FF |
345 | |
346 | static enum language cu_language; | |
bf229b4e | 347 | static const struct language_defn *cu_language_defn; |
95ff889e | 348 | |
35f5886e | 349 | /* Forward declarations of static functions so we don't have to worry |
1ab3bf1b JG |
350 | about ordering within this file. */ |
351 | ||
13b5a7ff FF |
352 | static int |
353 | attribute_size PARAMS ((unsigned int)); | |
354 | ||
355 | static unsigned long | |
356 | target_to_host PARAMS ((char *, int, int, struct objfile *)); | |
95967e73 | 357 | |
1ab3bf1b JG |
358 | static void |
359 | add_enum_psymbol PARAMS ((struct dieinfo *, struct objfile *)); | |
360 | ||
2dbde378 FF |
361 | static void |
362 | handle_producer PARAMS ((char *)); | |
363 | ||
1ab3bf1b JG |
364 | static void |
365 | read_file_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); | |
35f5886e | 366 | |
58050209 | 367 | static void |
1ab3bf1b | 368 | read_func_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
369 | |
370 | static void | |
1ab3bf1b JG |
371 | read_lexical_block_scope PARAMS ((struct dieinfo *, char *, char *, |
372 | struct objfile *)); | |
35f5886e FF |
373 | |
374 | static void | |
1ab3bf1b | 375 | dwarfwarn (); |
4d315a07 | 376 | |
35f5886e | 377 | static void |
1ab3bf1b | 378 | scan_partial_symbols PARAMS ((char *, char *, struct objfile *)); |
35f5886e | 379 | |
35f5886e | 380 | static void |
d5931d79 JG |
381 | scan_compilation_units PARAMS ((char *, char *, file_ptr, |
382 | file_ptr, struct objfile *)); | |
35f5886e FF |
383 | |
384 | static void | |
1ab3bf1b | 385 | add_partial_symbol PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e FF |
386 | |
387 | static void | |
1ab3bf1b | 388 | init_psymbol_list PARAMS ((struct objfile *, int)); |
35f5886e FF |
389 | |
390 | static void | |
95967e73 | 391 | basicdieinfo PARAMS ((struct dieinfo *, char *, struct objfile *)); |
35f5886e FF |
392 | |
393 | static void | |
95967e73 | 394 | completedieinfo PARAMS ((struct dieinfo *, struct objfile *)); |
1ab3bf1b JG |
395 | |
396 | static void | |
397 | dwarf_psymtab_to_symtab PARAMS ((struct partial_symtab *)); | |
398 | ||
399 | static void | |
400 | psymtab_to_symtab_1 PARAMS ((struct partial_symtab *)); | |
35f5886e FF |
401 | |
402 | static struct symtab * | |
1ab3bf1b | 403 | read_ofile_symtab PARAMS ((struct partial_symtab *)); |
35f5886e FF |
404 | |
405 | static void | |
1ab3bf1b | 406 | process_dies PARAMS ((char *, char *, struct objfile *)); |
35f5886e FF |
407 | |
408 | static void | |
1ab3bf1b JG |
409 | read_structure_scope PARAMS ((struct dieinfo *, char *, char *, |
410 | struct objfile *)); | |
35f5886e FF |
411 | |
412 | static struct type * | |
84ffdec2 | 413 | decode_array_element_type PARAMS ((char *)); |
35f5886e FF |
414 | |
415 | static struct type * | |
1ab3bf1b | 416 | decode_subscr_data PARAMS ((char *, char *)); |
35f5886e FF |
417 | |
418 | static void | |
1ab3bf1b | 419 | dwarf_read_array_type PARAMS ((struct dieinfo *)); |
35f5886e | 420 | |
9e4c1921 | 421 | static void |
1ab3bf1b | 422 | read_tag_pointer_type PARAMS ((struct dieinfo *dip)); |
9e4c1921 | 423 | |
35f5886e | 424 | static void |
1ab3bf1b | 425 | read_subroutine_type PARAMS ((struct dieinfo *, char *, char *)); |
35f5886e FF |
426 | |
427 | static void | |
1ab3bf1b | 428 | read_enumeration PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
429 | |
430 | static struct type * | |
1ab3bf1b | 431 | struct_type PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
432 | |
433 | static struct type * | |
1ab3bf1b | 434 | enum_type PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e | 435 | |
35f5886e | 436 | static void |
1ab3bf1b | 437 | decode_line_numbers PARAMS ((char *)); |
35f5886e FF |
438 | |
439 | static struct type * | |
1ab3bf1b | 440 | decode_die_type PARAMS ((struct dieinfo *)); |
35f5886e FF |
441 | |
442 | static struct type * | |
1ab3bf1b | 443 | decode_mod_fund_type PARAMS ((char *)); |
35f5886e FF |
444 | |
445 | static struct type * | |
1ab3bf1b | 446 | decode_mod_u_d_type PARAMS ((char *)); |
35f5886e FF |
447 | |
448 | static struct type * | |
1c92ca6f | 449 | decode_modified_type PARAMS ((char *, unsigned int, int)); |
35f5886e FF |
450 | |
451 | static struct type * | |
1ab3bf1b | 452 | decode_fund_type PARAMS ((unsigned int)); |
35f5886e FF |
453 | |
454 | static char * | |
1ab3bf1b | 455 | create_name PARAMS ((char *, struct obstack *)); |
35f5886e | 456 | |
35f5886e | 457 | static struct type * |
13b5a7ff | 458 | lookup_utype PARAMS ((DIE_REF)); |
35f5886e FF |
459 | |
460 | static struct type * | |
13b5a7ff | 461 | alloc_utype PARAMS ((DIE_REF, struct type *)); |
35f5886e FF |
462 | |
463 | static struct symbol * | |
1ab3bf1b | 464 | new_symbol PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e | 465 | |
95ff889e FF |
466 | static void |
467 | synthesize_typedef PARAMS ((struct dieinfo *, struct objfile *, | |
468 | struct type *)); | |
469 | ||
35f5886e | 470 | static int |
1ab3bf1b | 471 | locval PARAMS ((char *)); |
35f5886e FF |
472 | |
473 | static void | |
1ab3bf1b JG |
474 | record_minimal_symbol PARAMS ((char *, CORE_ADDR, enum minimal_symbol_type, |
475 | struct objfile *)); | |
35f5886e | 476 | |
95ff889e FF |
477 | static void |
478 | set_cu_language PARAMS ((struct dieinfo *)); | |
479 | ||
bf229b4e FF |
480 | static struct type * |
481 | dwarf_fundamental_type PARAMS ((struct objfile *, int)); | |
482 | ||
483 | ||
484 | /* | |
485 | ||
486 | LOCAL FUNCTION | |
487 | ||
488 | dwarf_fundamental_type -- lookup or create a fundamental type | |
489 | ||
490 | SYNOPSIS | |
491 | ||
492 | struct type * | |
493 | dwarf_fundamental_type (struct objfile *objfile, int typeid) | |
494 | ||
495 | DESCRIPTION | |
496 | ||
497 | DWARF version 1 doesn't supply any fundamental type information, | |
498 | so gdb has to construct such types. It has a fixed number of | |
499 | fundamental types that it knows how to construct, which is the | |
500 | union of all types that it knows how to construct for all languages | |
501 | that it knows about. These are enumerated in gdbtypes.h. | |
502 | ||
503 | As an example, assume we find a DIE that references a DWARF | |
504 | fundamental type of FT_integer. We first look in the ftypes | |
505 | array to see if we already have such a type, indexed by the | |
506 | gdb internal value of FT_INTEGER. If so, we simply return a | |
507 | pointer to that type. If not, then we ask an appropriate | |
508 | language dependent routine to create a type FT_INTEGER, using | |
509 | defaults reasonable for the current target machine, and install | |
510 | that type in ftypes for future reference. | |
511 | ||
512 | RETURNS | |
513 | ||
514 | Pointer to a fundamental type. | |
515 | ||
516 | */ | |
517 | ||
518 | static struct type * | |
519 | dwarf_fundamental_type (objfile, typeid) | |
520 | struct objfile *objfile; | |
521 | int typeid; | |
522 | { | |
523 | if (typeid < 0 || typeid >= FT_NUM_MEMBERS) | |
524 | { | |
525 | error ("internal error - invalid fundamental type id %d", typeid); | |
526 | } | |
527 | ||
528 | /* Look for this particular type in the fundamental type vector. If one is | |
529 | not found, create and install one appropriate for the current language | |
530 | and the current target machine. */ | |
531 | ||
532 | if (ftypes[typeid] == NULL) | |
533 | { | |
534 | ftypes[typeid] = cu_language_defn -> la_fund_type(objfile, typeid); | |
535 | } | |
536 | ||
537 | return (ftypes[typeid]); | |
538 | } | |
539 | ||
95ff889e FF |
540 | /* |
541 | ||
542 | LOCAL FUNCTION | |
543 | ||
544 | set_cu_language -- set local copy of language for compilation unit | |
545 | ||
546 | SYNOPSIS | |
547 | ||
548 | void | |
549 | set_cu_language (struct dieinfo *dip) | |
550 | ||
551 | DESCRIPTION | |
552 | ||
553 | Decode the language attribute for a compilation unit DIE and | |
554 | remember what the language was. We use this at various times | |
555 | when processing DIE's for a given compilation unit. | |
556 | ||
557 | RETURNS | |
558 | ||
559 | No return value. | |
560 | ||
561 | */ | |
562 | ||
563 | static void | |
564 | set_cu_language (dip) | |
565 | struct dieinfo *dip; | |
566 | { | |
567 | switch (dip -> at_language) | |
568 | { | |
569 | case LANG_C89: | |
570 | case LANG_C: | |
571 | cu_language = language_c; | |
572 | break; | |
573 | case LANG_C_PLUS_PLUS: | |
574 | cu_language = language_cplus; | |
575 | break; | |
19cfe25d | 576 | /* start-sanitize-chill */ |
e58de8a2 FF |
577 | case LANG_CHILL: |
578 | cu_language = language_chill; | |
579 | break; | |
19cfe25d | 580 | /* end-sanitize-chill */ |
e58de8a2 FF |
581 | case LANG_MODULA2: |
582 | cu_language = language_m2; | |
583 | break; | |
95ff889e FF |
584 | case LANG_ADA83: |
585 | case LANG_COBOL74: | |
586 | case LANG_COBOL85: | |
587 | case LANG_FORTRAN77: | |
588 | case LANG_FORTRAN90: | |
589 | case LANG_PASCAL83: | |
95ff889e FF |
590 | default: |
591 | cu_language = language_unknown; | |
592 | break; | |
593 | } | |
bf229b4e | 594 | cu_language_defn = language_def (cu_language); |
95ff889e FF |
595 | } |
596 | ||
35f5886e FF |
597 | /* |
598 | ||
599 | GLOBAL FUNCTION | |
600 | ||
601 | dwarf_build_psymtabs -- build partial symtabs from DWARF debug info | |
602 | ||
603 | SYNOPSIS | |
604 | ||
d5931d79 | 605 | void dwarf_build_psymtabs (struct objfile *objfile, |
2670f34d | 606 | struct section_offsets *section_offsets, |
d5931d79 JG |
607 | int mainline, file_ptr dbfoff, unsigned int dbfsize, |
608 | file_ptr lnoffset, unsigned int lnsize) | |
35f5886e FF |
609 | |
610 | DESCRIPTION | |
611 | ||
612 | This function is called upon to build partial symtabs from files | |
613 | containing DIE's (Dwarf Information Entries) and DWARF line numbers. | |
614 | ||
d5931d79 | 615 | It is passed a bfd* containing the DIES |
35f5886e FF |
616 | and line number information, the corresponding filename for that |
617 | file, a base address for relocating the symbols, a flag indicating | |
618 | whether or not this debugging information is from a "main symbol | |
619 | table" rather than a shared library or dynamically linked file, | |
620 | and file offset/size pairs for the DIE information and line number | |
621 | information. | |
622 | ||
623 | RETURNS | |
624 | ||
625 | No return value. | |
626 | ||
627 | */ | |
628 | ||
629 | void | |
d5931d79 JG |
630 | dwarf_build_psymtabs (objfile, section_offsets, mainline, dbfoff, dbfsize, |
631 | lnoffset, lnsize) | |
632 | struct objfile *objfile; | |
2670f34d | 633 | struct section_offsets *section_offsets; |
1ab3bf1b | 634 | int mainline; |
d5931d79 | 635 | file_ptr dbfoff; |
4090fe1c | 636 | unsigned int dbfsize; |
d5931d79 | 637 | file_ptr lnoffset; |
1ab3bf1b | 638 | unsigned int lnsize; |
35f5886e | 639 | { |
d5931d79 | 640 | bfd *abfd = objfile->obfd; |
35f5886e FF |
641 | struct cleanup *back_to; |
642 | ||
95967e73 | 643 | current_objfile = objfile; |
4090fe1c | 644 | dbsize = dbfsize; |
35f5886e FF |
645 | dbbase = xmalloc (dbsize); |
646 | dbroff = 0; | |
d5931d79 JG |
647 | if ((bfd_seek (abfd, dbfoff, L_SET) != 0) || |
648 | (bfd_read (dbbase, dbsize, 1, abfd) != dbsize)) | |
35f5886e FF |
649 | { |
650 | free (dbbase); | |
d5931d79 | 651 | error ("can't read DWARF data from '%s'", bfd_get_filename (abfd)); |
35f5886e FF |
652 | } |
653 | back_to = make_cleanup (free, dbbase); | |
654 | ||
655 | /* If we are reinitializing, or if we have never loaded syms yet, init. | |
656 | Since we have no idea how many DIES we are looking at, we just guess | |
657 | some arbitrary value. */ | |
658 | ||
13b5a7ff FF |
659 | if (mainline || objfile -> global_psymbols.size == 0 || |
660 | objfile -> static_psymbols.size == 0) | |
35f5886e | 661 | { |
1ab3bf1b | 662 | init_psymbol_list (objfile, 1024); |
35f5886e FF |
663 | } |
664 | ||
84ffdec2 | 665 | /* Save the relocation factor where everybody can see it. */ |
f8b76e70 | 666 | |
2670f34d JG |
667 | base_section_offsets = section_offsets; |
668 | baseaddr = ANOFFSET (section_offsets, 0); | |
f8b76e70 | 669 | |
35f5886e FF |
670 | /* Follow the compilation unit sibling chain, building a partial symbol |
671 | table entry for each one. Save enough information about each compilation | |
672 | unit to locate the full DWARF information later. */ | |
673 | ||
d5931d79 | 674 | scan_compilation_units (dbbase, dbbase + dbsize, dbfoff, lnoffset, objfile); |
35f5886e | 675 | |
35f5886e | 676 | do_cleanups (back_to); |
95967e73 | 677 | current_objfile = NULL; |
35f5886e FF |
678 | } |
679 | ||
680 | ||
681 | /* | |
682 | ||
683 | LOCAL FUNCTION | |
684 | ||
1ab3bf1b | 685 | record_minimal_symbol -- add entry to gdb's minimal symbol table |
35f5886e FF |
686 | |
687 | SYNOPSIS | |
688 | ||
1ab3bf1b JG |
689 | static void record_minimal_symbol (char *name, CORE_ADDR address, |
690 | enum minimal_symbol_type ms_type, | |
691 | struct objfile *objfile) | |
35f5886e FF |
692 | |
693 | DESCRIPTION | |
694 | ||
695 | Given a pointer to the name of a symbol that should be added to the | |
1ab3bf1b | 696 | minimal symbol table, and the address associated with that |
35f5886e | 697 | symbol, records this information for later use in building the |
1ab3bf1b | 698 | minimal symbol table. |
35f5886e | 699 | |
35f5886e FF |
700 | */ |
701 | ||
702 | static void | |
1ab3bf1b JG |
703 | record_minimal_symbol (name, address, ms_type, objfile) |
704 | char *name; | |
705 | CORE_ADDR address; | |
706 | enum minimal_symbol_type ms_type; | |
707 | struct objfile *objfile; | |
35f5886e | 708 | { |
1ab3bf1b JG |
709 | name = obsavestring (name, strlen (name), &objfile -> symbol_obstack); |
710 | prim_record_minimal_symbol (name, address, ms_type); | |
35f5886e FF |
711 | } |
712 | ||
713 | /* | |
714 | ||
715 | LOCAL FUNCTION | |
716 | ||
717 | dwarfwarn -- issue a DWARF related warning | |
718 | ||
719 | DESCRIPTION | |
720 | ||
721 | Issue warnings about DWARF related things that aren't serious enough | |
722 | to warrant aborting with an error, but should not be ignored either. | |
723 | This includes things like detectable corruption in DIE's, missing | |
724 | DIE's, unimplemented features, etc. | |
725 | ||
726 | In general, running across tags or attributes that we don't recognize | |
727 | is not considered to be a problem and we should not issue warnings | |
728 | about such. | |
729 | ||
730 | NOTES | |
731 | ||
732 | We mostly follow the example of the error() routine, but without | |
733 | returning to command level. It is arguable about whether warnings | |
734 | should be issued at all, and if so, where they should go (stdout or | |
735 | stderr). | |
736 | ||
737 | We assume that curdie is valid and contains at least the basic | |
738 | information for the DIE where the problem was noticed. | |
739 | */ | |
740 | ||
741 | static void | |
313fdead JG |
742 | dwarfwarn (va_alist) |
743 | va_dcl | |
35f5886e FF |
744 | { |
745 | va_list ap; | |
313fdead | 746 | char *fmt; |
35f5886e | 747 | |
313fdead JG |
748 | va_start (ap); |
749 | fmt = va_arg (ap, char *); | |
35f5886e | 750 | warning_setup (); |
13b5a7ff | 751 | fprintf (stderr, "warning: DWARF ref 0x%x: ", curdie -> die_ref); |
35f5886e FF |
752 | if (curdie -> at_name) |
753 | { | |
754 | fprintf (stderr, "'%s': ", curdie -> at_name); | |
755 | } | |
756 | vfprintf (stderr, fmt, ap); | |
757 | fprintf (stderr, "\n"); | |
758 | fflush (stderr); | |
759 | va_end (ap); | |
760 | } | |
4d315a07 | 761 | |
35f5886e FF |
762 | /* |
763 | ||
764 | LOCAL FUNCTION | |
765 | ||
766 | read_lexical_block_scope -- process all dies in a lexical block | |
767 | ||
768 | SYNOPSIS | |
769 | ||
770 | static void read_lexical_block_scope (struct dieinfo *dip, | |
771 | char *thisdie, char *enddie) | |
772 | ||
773 | DESCRIPTION | |
774 | ||
775 | Process all the DIES contained within a lexical block scope. | |
776 | Start a new scope, process the dies, and then close the scope. | |
777 | ||
778 | */ | |
779 | ||
780 | static void | |
1ab3bf1b JG |
781 | read_lexical_block_scope (dip, thisdie, enddie, objfile) |
782 | struct dieinfo *dip; | |
783 | char *thisdie; | |
784 | char *enddie; | |
785 | struct objfile *objfile; | |
35f5886e | 786 | { |
4d315a07 FF |
787 | register struct context_stack *new; |
788 | ||
4ed3a9ea | 789 | push_context (0, dip -> at_low_pc); |
13b5a7ff | 790 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 FF |
791 | new = pop_context (); |
792 | if (local_symbols != NULL) | |
793 | { | |
794 | finish_block (0, &local_symbols, new -> old_blocks, new -> start_addr, | |
1ab3bf1b | 795 | dip -> at_high_pc, objfile); |
4d315a07 FF |
796 | } |
797 | local_symbols = new -> locals; | |
35f5886e FF |
798 | } |
799 | ||
800 | /* | |
801 | ||
802 | LOCAL FUNCTION | |
803 | ||
804 | lookup_utype -- look up a user defined type from die reference | |
805 | ||
806 | SYNOPSIS | |
807 | ||
13b5a7ff | 808 | static type *lookup_utype (DIE_REF die_ref) |
35f5886e FF |
809 | |
810 | DESCRIPTION | |
811 | ||
812 | Given a DIE reference, lookup the user defined type associated with | |
813 | that DIE, if it has been registered already. If not registered, then | |
814 | return NULL. Alloc_utype() can be called to register an empty | |
815 | type for this reference, which will be filled in later when the | |
816 | actual referenced DIE is processed. | |
817 | */ | |
818 | ||
819 | static struct type * | |
13b5a7ff FF |
820 | lookup_utype (die_ref) |
821 | DIE_REF die_ref; | |
35f5886e FF |
822 | { |
823 | struct type *type = NULL; | |
824 | int utypeidx; | |
825 | ||
13b5a7ff | 826 | utypeidx = (die_ref - dbroff) / 4; |
35f5886e FF |
827 | if ((utypeidx < 0) || (utypeidx >= numutypes)) |
828 | { | |
13b5a7ff | 829 | dwarfwarn ("reference to DIE (0x%x) outside compilation unit", die_ref); |
35f5886e FF |
830 | } |
831 | else | |
832 | { | |
833 | type = *(utypes + utypeidx); | |
834 | } | |
835 | return (type); | |
836 | } | |
837 | ||
838 | ||
839 | /* | |
840 | ||
841 | LOCAL FUNCTION | |
842 | ||
843 | alloc_utype -- add a user defined type for die reference | |
844 | ||
845 | SYNOPSIS | |
846 | ||
13b5a7ff | 847 | static type *alloc_utype (DIE_REF die_ref, struct type *utypep) |
35f5886e FF |
848 | |
849 | DESCRIPTION | |
850 | ||
13b5a7ff | 851 | Given a die reference DIE_REF, and a possible pointer to a user |
35f5886e FF |
852 | defined type UTYPEP, register that this reference has a user |
853 | defined type and either use the specified type in UTYPEP or | |
854 | make a new empty type that will be filled in later. | |
855 | ||
856 | We should only be called after calling lookup_utype() to verify that | |
13b5a7ff | 857 | there is not currently a type registered for DIE_REF. |
35f5886e FF |
858 | */ |
859 | ||
860 | static struct type * | |
13b5a7ff FF |
861 | alloc_utype (die_ref, utypep) |
862 | DIE_REF die_ref; | |
1ab3bf1b | 863 | struct type *utypep; |
35f5886e FF |
864 | { |
865 | struct type **typep; | |
866 | int utypeidx; | |
867 | ||
13b5a7ff | 868 | utypeidx = (die_ref - dbroff) / 4; |
35f5886e FF |
869 | typep = utypes + utypeidx; |
870 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
871 | { | |
bf229b4e | 872 | utypep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff | 873 | dwarfwarn ("reference to DIE (0x%x) outside compilation unit", die_ref); |
35f5886e FF |
874 | } |
875 | else if (*typep != NULL) | |
876 | { | |
877 | utypep = *typep; | |
878 | SQUAWK (("internal error: dup user type allocation")); | |
879 | } | |
880 | else | |
881 | { | |
882 | if (utypep == NULL) | |
883 | { | |
8050a57b | 884 | utypep = alloc_type (current_objfile); |
35f5886e FF |
885 | } |
886 | *typep = utypep; | |
887 | } | |
888 | return (utypep); | |
889 | } | |
890 | ||
891 | /* | |
892 | ||
893 | LOCAL FUNCTION | |
894 | ||
895 | decode_die_type -- return a type for a specified die | |
896 | ||
897 | SYNOPSIS | |
898 | ||
899 | static struct type *decode_die_type (struct dieinfo *dip) | |
900 | ||
901 | DESCRIPTION | |
902 | ||
903 | Given a pointer to a die information structure DIP, decode the | |
904 | type of the die and return a pointer to the decoded type. All | |
905 | dies without specific types default to type int. | |
906 | */ | |
907 | ||
908 | static struct type * | |
1ab3bf1b JG |
909 | decode_die_type (dip) |
910 | struct dieinfo *dip; | |
35f5886e FF |
911 | { |
912 | struct type *type = NULL; | |
913 | ||
914 | if (dip -> at_fund_type != 0) | |
915 | { | |
916 | type = decode_fund_type (dip -> at_fund_type); | |
917 | } | |
918 | else if (dip -> at_mod_fund_type != NULL) | |
919 | { | |
920 | type = decode_mod_fund_type (dip -> at_mod_fund_type); | |
921 | } | |
922 | else if (dip -> at_user_def_type) | |
923 | { | |
924 | if ((type = lookup_utype (dip -> at_user_def_type)) == NULL) | |
925 | { | |
926 | type = alloc_utype (dip -> at_user_def_type, NULL); | |
927 | } | |
928 | } | |
929 | else if (dip -> at_mod_u_d_type) | |
930 | { | |
931 | type = decode_mod_u_d_type (dip -> at_mod_u_d_type); | |
932 | } | |
933 | else | |
934 | { | |
bf229b4e | 935 | type = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
35f5886e FF |
936 | } |
937 | return (type); | |
938 | } | |
939 | ||
940 | /* | |
941 | ||
942 | LOCAL FUNCTION | |
943 | ||
944 | struct_type -- compute and return the type for a struct or union | |
945 | ||
946 | SYNOPSIS | |
947 | ||
948 | static struct type *struct_type (struct dieinfo *dip, char *thisdie, | |
8b5b6fae | 949 | char *enddie, struct objfile *objfile) |
35f5886e FF |
950 | |
951 | DESCRIPTION | |
952 | ||
953 | Given pointer to a die information structure for a die which | |
715cafcb FF |
954 | defines a union or structure (and MUST define one or the other), |
955 | and pointers to the raw die data that define the range of dies which | |
956 | define the members, compute and return the user defined type for the | |
957 | structure or union. | |
35f5886e FF |
958 | */ |
959 | ||
960 | static struct type * | |
1ab3bf1b JG |
961 | struct_type (dip, thisdie, enddie, objfile) |
962 | struct dieinfo *dip; | |
963 | char *thisdie; | |
964 | char *enddie; | |
965 | struct objfile *objfile; | |
35f5886e FF |
966 | { |
967 | struct type *type; | |
968 | struct nextfield { | |
969 | struct nextfield *next; | |
970 | struct field field; | |
971 | }; | |
972 | struct nextfield *list = NULL; | |
973 | struct nextfield *new; | |
974 | int nfields = 0; | |
975 | int n; | |
976 | char *tpart1; | |
35f5886e | 977 | struct dieinfo mbr; |
8b5b6fae | 978 | char *nextdie; |
50055e94 | 979 | int anonymous_size; |
35f5886e | 980 | |
13b5a7ff | 981 | if ((type = lookup_utype (dip -> die_ref)) == NULL) |
35f5886e | 982 | { |
5edf98d7 | 983 | /* No forward references created an empty type, so install one now */ |
13b5a7ff | 984 | type = alloc_utype (dip -> die_ref, NULL); |
35f5886e | 985 | } |
a3723a43 | 986 | INIT_CPLUS_SPECIFIC(type); |
13b5a7ff | 987 | switch (dip -> die_tag) |
35f5886e | 988 | { |
95ff889e FF |
989 | case TAG_class_type: |
990 | TYPE_CODE (type) = TYPE_CODE_CLASS; | |
991 | tpart1 = "class"; | |
992 | break; | |
715cafcb | 993 | case TAG_structure_type: |
5edf98d7 | 994 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
715cafcb FF |
995 | tpart1 = "struct"; |
996 | break; | |
997 | case TAG_union_type: | |
998 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
999 | tpart1 = "union"; | |
1000 | break; | |
1001 | default: | |
1002 | /* Should never happen */ | |
1003 | TYPE_CODE (type) = TYPE_CODE_UNDEF; | |
1004 | tpart1 = "???"; | |
95ff889e | 1005 | SQUAWK (("missing class, structure, or union tag")); |
715cafcb | 1006 | break; |
35f5886e | 1007 | } |
5edf98d7 FF |
1008 | /* Some compilers try to be helpful by inventing "fake" names for |
1009 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1010 | Thanks, but no thanks... */ | |
715cafcb FF |
1011 | if (dip -> at_name != NULL |
1012 | && *dip -> at_name != '~' | |
1013 | && *dip -> at_name != '.') | |
35f5886e | 1014 | { |
95967e73 | 1015 | TYPE_NAME (type) = obconcat (&objfile -> type_obstack, |
1ab3bf1b | 1016 | tpart1, " ", dip -> at_name); |
35f5886e | 1017 | } |
50055e94 FF |
1018 | /* Use whatever size is known. Zero is a valid size. We might however |
1019 | wish to check has_at_byte_size to make sure that some byte size was | |
1020 | given explicitly, but DWARF doesn't specify that explicit sizes of | |
1021 | zero have to present, so complaining about missing sizes should | |
1022 | probably not be the default. */ | |
1023 | TYPE_LENGTH (type) = dip -> at_byte_size; | |
13b5a7ff | 1024 | thisdie += dip -> die_length; |
35f5886e FF |
1025 | while (thisdie < enddie) |
1026 | { | |
95967e73 FF |
1027 | basicdieinfo (&mbr, thisdie, objfile); |
1028 | completedieinfo (&mbr, objfile); | |
13b5a7ff | 1029 | if (mbr.die_length <= SIZEOF_DIE_LENGTH) |
35f5886e FF |
1030 | { |
1031 | break; | |
1032 | } | |
8b5b6fae FF |
1033 | else if (mbr.at_sibling != 0) |
1034 | { | |
1035 | nextdie = dbbase + mbr.at_sibling - dbroff; | |
1036 | } | |
1037 | else | |
1038 | { | |
13b5a7ff | 1039 | nextdie = thisdie + mbr.die_length; |
8b5b6fae | 1040 | } |
13b5a7ff | 1041 | switch (mbr.die_tag) |
35f5886e FF |
1042 | { |
1043 | case TAG_member: | |
1044 | /* Get space to record the next field's data. */ | |
1045 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1046 | new -> next = list; | |
1047 | list = new; | |
1048 | /* Save the data. */ | |
50e0dc41 FF |
1049 | list -> field.name = |
1050 | obsavestring (mbr.at_name, strlen (mbr.at_name), | |
1051 | &objfile -> type_obstack); | |
35f5886e FF |
1052 | list -> field.type = decode_die_type (&mbr); |
1053 | list -> field.bitpos = 8 * locval (mbr.at_location); | |
4db8e515 FF |
1054 | /* Handle bit fields. */ |
1055 | list -> field.bitsize = mbr.at_bit_size; | |
1056 | #if BITS_BIG_ENDIAN | |
1057 | /* For big endian bits, the at_bit_offset gives the additional | |
1058 | bit offset from the MSB of the containing anonymous object to | |
1059 | the MSB of the field. We don't have to do anything special | |
1060 | since we don't need to know the size of the anonymous object. */ | |
1061 | list -> field.bitpos += mbr.at_bit_offset; | |
1062 | #else | |
1063 | /* For little endian bits, we need to have a non-zero at_bit_size, | |
1064 | so that we know we are in fact dealing with a bitfield. Compute | |
1065 | the bit offset to the MSB of the anonymous object, subtract off | |
1066 | the number of bits from the MSB of the field to the MSB of the | |
1067 | object, and then subtract off the number of bits of the field | |
1068 | itself. The result is the bit offset of the LSB of the field. */ | |
1069 | if (mbr.at_bit_size > 0) | |
1070 | { | |
50055e94 FF |
1071 | if (mbr.has_at_byte_size) |
1072 | { | |
1073 | /* The size of the anonymous object containing the bit field | |
1074 | is explicit, so use the indicated size (in bytes). */ | |
1075 | anonymous_size = mbr.at_byte_size; | |
1076 | } | |
1077 | else | |
1078 | { | |
1079 | /* The size of the anonymous object containing the bit field | |
1080 | matches the size of an object of the bit field's type. | |
1081 | DWARF allows at_byte_size to be left out in such cases, | |
1082 | as a debug information size optimization. */ | |
1083 | anonymous_size = TYPE_LENGTH (list -> field.type); | |
1084 | } | |
4db8e515 | 1085 | list -> field.bitpos += |
50055e94 | 1086 | anonymous_size * 8 - mbr.at_bit_offset - mbr.at_bit_size; |
4db8e515 FF |
1087 | } |
1088 | #endif | |
35f5886e FF |
1089 | nfields++; |
1090 | break; | |
1091 | default: | |
8b5b6fae | 1092 | process_dies (thisdie, nextdie, objfile); |
35f5886e FF |
1093 | break; |
1094 | } | |
8b5b6fae | 1095 | thisdie = nextdie; |
35f5886e | 1096 | } |
5edf98d7 FF |
1097 | /* Now create the vector of fields, and record how big it is. We may |
1098 | not even have any fields, if this DIE was generated due to a reference | |
1099 | to an anonymous structure or union. In this case, TYPE_FLAG_STUB is | |
1100 | set, which clues gdb in to the fact that it needs to search elsewhere | |
1101 | for the full structure definition. */ | |
1102 | if (nfields == 0) | |
35f5886e | 1103 | { |
5edf98d7 FF |
1104 | TYPE_FLAGS (type) |= TYPE_FLAG_STUB; |
1105 | } | |
1106 | else | |
1107 | { | |
1108 | TYPE_NFIELDS (type) = nfields; | |
1109 | TYPE_FIELDS (type) = (struct field *) | |
dac9734e | 1110 | TYPE_ALLOC (type, sizeof (struct field) * nfields); |
5edf98d7 FF |
1111 | /* Copy the saved-up fields into the field vector. */ |
1112 | for (n = nfields; list; list = list -> next) | |
1113 | { | |
1114 | TYPE_FIELD (type, --n) = list -> field; | |
1115 | } | |
1116 | } | |
35f5886e FF |
1117 | return (type); |
1118 | } | |
1119 | ||
1120 | /* | |
1121 | ||
1122 | LOCAL FUNCTION | |
1123 | ||
1124 | read_structure_scope -- process all dies within struct or union | |
1125 | ||
1126 | SYNOPSIS | |
1127 | ||
1128 | static void read_structure_scope (struct dieinfo *dip, | |
8b5b6fae | 1129 | char *thisdie, char *enddie, struct objfile *objfile) |
35f5886e FF |
1130 | |
1131 | DESCRIPTION | |
1132 | ||
1133 | Called when we find the DIE that starts a structure or union | |
1134 | scope (definition) to process all dies that define the members | |
1135 | of the structure or union. DIP is a pointer to the die info | |
1136 | struct for the DIE that names the structure or union. | |
1137 | ||
1138 | NOTES | |
1139 | ||
1140 | Note that we need to call struct_type regardless of whether or not | |
84ce6717 FF |
1141 | the DIE has an at_name attribute, since it might be an anonymous |
1142 | structure or union. This gets the type entered into our set of | |
1143 | user defined types. | |
1144 | ||
1145 | However, if the structure is incomplete (an opaque struct/union) | |
1146 | then suppress creating a symbol table entry for it since gdb only | |
1147 | wants to find the one with the complete definition. Note that if | |
1148 | it is complete, we just call new_symbol, which does it's own | |
1149 | checking about whether the struct/union is anonymous or not (and | |
1150 | suppresses creating a symbol table entry itself). | |
1151 | ||
35f5886e FF |
1152 | */ |
1153 | ||
1154 | static void | |
1ab3bf1b JG |
1155 | read_structure_scope (dip, thisdie, enddie, objfile) |
1156 | struct dieinfo *dip; | |
1157 | char *thisdie; | |
1158 | char *enddie; | |
1159 | struct objfile *objfile; | |
35f5886e FF |
1160 | { |
1161 | struct type *type; | |
1162 | struct symbol *sym; | |
1163 | ||
8b5b6fae | 1164 | type = struct_type (dip, thisdie, enddie, objfile); |
84ce6717 | 1165 | if (!(TYPE_FLAGS (type) & TYPE_FLAG_STUB)) |
35f5886e | 1166 | { |
95ff889e FF |
1167 | sym = new_symbol (dip, objfile); |
1168 | if (sym != NULL) | |
84ce6717 FF |
1169 | { |
1170 | SYMBOL_TYPE (sym) = type; | |
95ff889e FF |
1171 | if (cu_language == language_cplus) |
1172 | { | |
1173 | synthesize_typedef (dip, objfile, type); | |
1174 | } | |
84ce6717 | 1175 | } |
35f5886e FF |
1176 | } |
1177 | } | |
1178 | ||
1179 | /* | |
1180 | ||
1181 | LOCAL FUNCTION | |
1182 | ||
1183 | decode_array_element_type -- decode type of the array elements | |
1184 | ||
1185 | SYNOPSIS | |
1186 | ||
1187 | static struct type *decode_array_element_type (char *scan, char *end) | |
1188 | ||
1189 | DESCRIPTION | |
1190 | ||
1191 | As the last step in decoding the array subscript information for an | |
1192 | array DIE, we need to decode the type of the array elements. We are | |
1193 | passed a pointer to this last part of the subscript information and | |
1194 | must return the appropriate type. If the type attribute is not | |
1195 | recognized, just warn about the problem and return type int. | |
1196 | */ | |
1197 | ||
1198 | static struct type * | |
84ffdec2 | 1199 | decode_array_element_type (scan) |
1ab3bf1b | 1200 | char *scan; |
35f5886e FF |
1201 | { |
1202 | struct type *typep; | |
13b5a7ff FF |
1203 | DIE_REF die_ref; |
1204 | unsigned short attribute; | |
35f5886e | 1205 | unsigned short fundtype; |
13b5a7ff | 1206 | int nbytes; |
35f5886e | 1207 | |
13b5a7ff FF |
1208 | attribute = target_to_host (scan, SIZEOF_ATTRIBUTE, GET_UNSIGNED, |
1209 | current_objfile); | |
1210 | scan += SIZEOF_ATTRIBUTE; | |
1211 | if ((nbytes = attribute_size (attribute)) == -1) | |
1212 | { | |
35f5886e | 1213 | SQUAWK (("bad array element type attribute 0x%x", attribute)); |
bf229b4e | 1214 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff FF |
1215 | } |
1216 | else | |
1217 | { | |
1218 | switch (attribute) | |
1219 | { | |
1220 | case AT_fund_type: | |
1221 | fundtype = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1222 | current_objfile); | |
1223 | typep = decode_fund_type (fundtype); | |
1224 | break; | |
1225 | case AT_mod_fund_type: | |
1226 | typep = decode_mod_fund_type (scan); | |
1227 | break; | |
1228 | case AT_user_def_type: | |
1229 | die_ref = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1230 | current_objfile); | |
1231 | if ((typep = lookup_utype (die_ref)) == NULL) | |
1232 | { | |
1233 | typep = alloc_utype (die_ref, NULL); | |
1234 | } | |
1235 | break; | |
1236 | case AT_mod_u_d_type: | |
1237 | typep = decode_mod_u_d_type (scan); | |
1238 | break; | |
1239 | default: | |
1240 | SQUAWK (("bad array element type attribute 0x%x", attribute)); | |
bf229b4e | 1241 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff FF |
1242 | break; |
1243 | } | |
35f5886e FF |
1244 | } |
1245 | return (typep); | |
1246 | } | |
1247 | ||
1248 | /* | |
1249 | ||
1250 | LOCAL FUNCTION | |
1251 | ||
1252 | decode_subscr_data -- decode array subscript and element type data | |
1253 | ||
1254 | SYNOPSIS | |
1255 | ||
1256 | static struct type *decode_subscr_data (char *scan, char *end) | |
1257 | ||
1258 | DESCRIPTION | |
1259 | ||
1260 | The array subscripts and the data type of the elements of an | |
1261 | array are described by a list of data items, stored as a block | |
1262 | of contiguous bytes. There is a data item describing each array | |
1263 | dimension, and a final data item describing the element type. | |
1264 | The data items are ordered the same as their appearance in the | |
1265 | source (I.E. leftmost dimension first, next to leftmost second, | |
1266 | etc). | |
1267 | ||
1268 | We are passed a pointer to the start of the block of bytes | |
1269 | containing the data items, and a pointer to the first byte past | |
1270 | the data. This function decodes the data and returns a type. | |
1271 | ||
1272 | BUGS | |
1273 | FIXME: This code only implements the forms currently used | |
1274 | by the AT&T and GNU C compilers. | |
1275 | ||
1276 | The end pointer is supplied for error checking, maybe we should | |
1277 | use it for that... | |
1278 | */ | |
1279 | ||
1280 | static struct type * | |
1ab3bf1b JG |
1281 | decode_subscr_data (scan, end) |
1282 | char *scan; | |
1283 | char *end; | |
35f5886e FF |
1284 | { |
1285 | struct type *typep = NULL; | |
1286 | struct type *nexttype; | |
13b5a7ff FF |
1287 | unsigned int format; |
1288 | unsigned short fundtype; | |
1289 | unsigned long lowbound; | |
1290 | unsigned long highbound; | |
1291 | int nbytes; | |
35f5886e | 1292 | |
13b5a7ff FF |
1293 | format = target_to_host (scan, SIZEOF_FORMAT_SPECIFIER, GET_UNSIGNED, |
1294 | current_objfile); | |
1295 | scan += SIZEOF_FORMAT_SPECIFIER; | |
35f5886e FF |
1296 | switch (format) |
1297 | { | |
1298 | case FMT_ET: | |
84ffdec2 | 1299 | typep = decode_array_element_type (scan); |
35f5886e FF |
1300 | break; |
1301 | case FMT_FT_C_C: | |
13b5a7ff FF |
1302 | fundtype = target_to_host (scan, SIZEOF_FMT_FT, GET_UNSIGNED, |
1303 | current_objfile); | |
1304 | scan += SIZEOF_FMT_FT; | |
35f5886e FF |
1305 | if (fundtype != FT_integer && fundtype != FT_signed_integer |
1306 | && fundtype != FT_unsigned_integer) | |
1307 | { | |
1308 | SQUAWK (("array subscripts must be integral types, not type 0x%x", | |
13b5a7ff | 1309 | fundtype)); |
35f5886e FF |
1310 | } |
1311 | else | |
1312 | { | |
13b5a7ff FF |
1313 | nbytes = TARGET_FT_LONG_SIZE (current_objfile); |
1314 | lowbound = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1315 | current_objfile); | |
1316 | scan += nbytes; | |
1317 | highbound = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1318 | current_objfile); | |
1319 | scan += nbytes; | |
35f5886e FF |
1320 | nexttype = decode_subscr_data (scan, end); |
1321 | if (nexttype != NULL) | |
1322 | { | |
8050a57b | 1323 | typep = alloc_type (current_objfile); |
35f5886e FF |
1324 | TYPE_CODE (typep) = TYPE_CODE_ARRAY; |
1325 | TYPE_LENGTH (typep) = TYPE_LENGTH (nexttype); | |
6c316cfd | 1326 | TYPE_LENGTH (typep) *= (highbound - lowbound) + 1; |
35f5886e FF |
1327 | TYPE_TARGET_TYPE (typep) = nexttype; |
1328 | } | |
1329 | } | |
1330 | break; | |
1331 | case FMT_FT_C_X: | |
1332 | case FMT_FT_X_C: | |
1333 | case FMT_FT_X_X: | |
1334 | case FMT_UT_C_C: | |
1335 | case FMT_UT_C_X: | |
1336 | case FMT_UT_X_C: | |
1337 | case FMT_UT_X_X: | |
1338 | SQUAWK (("array subscript format 0x%x not handled yet", format)); | |
1339 | break; | |
1340 | default: | |
1341 | SQUAWK (("unknown array subscript format %x", format)); | |
1342 | break; | |
1343 | } | |
1344 | return (typep); | |
1345 | } | |
1346 | ||
1347 | /* | |
1348 | ||
1349 | LOCAL FUNCTION | |
1350 | ||
4d315a07 | 1351 | dwarf_read_array_type -- read TAG_array_type DIE |
35f5886e FF |
1352 | |
1353 | SYNOPSIS | |
1354 | ||
4d315a07 | 1355 | static void dwarf_read_array_type (struct dieinfo *dip) |
35f5886e FF |
1356 | |
1357 | DESCRIPTION | |
1358 | ||
1359 | Extract all information from a TAG_array_type DIE and add to | |
1360 | the user defined type vector. | |
1361 | */ | |
1362 | ||
1363 | static void | |
1ab3bf1b JG |
1364 | dwarf_read_array_type (dip) |
1365 | struct dieinfo *dip; | |
35f5886e FF |
1366 | { |
1367 | struct type *type; | |
af213624 | 1368 | struct type *utype; |
35f5886e FF |
1369 | char *sub; |
1370 | char *subend; | |
13b5a7ff FF |
1371 | unsigned short blocksz; |
1372 | int nbytes; | |
35f5886e FF |
1373 | |
1374 | if (dip -> at_ordering != ORD_row_major) | |
1375 | { | |
1376 | /* FIXME: Can gdb even handle column major arrays? */ | |
1377 | SQUAWK (("array not row major; not handled correctly")); | |
1378 | } | |
1379 | if ((sub = dip -> at_subscr_data) != NULL) | |
1380 | { | |
13b5a7ff FF |
1381 | nbytes = attribute_size (AT_subscr_data); |
1382 | blocksz = target_to_host (sub, nbytes, GET_UNSIGNED, current_objfile); | |
1383 | subend = sub + nbytes + blocksz; | |
1384 | sub += nbytes; | |
35f5886e FF |
1385 | type = decode_subscr_data (sub, subend); |
1386 | if (type == NULL) | |
1387 | { | |
13b5a7ff | 1388 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) |
af213624 | 1389 | { |
13b5a7ff | 1390 | utype = alloc_utype (dip -> die_ref, NULL); |
af213624 FF |
1391 | } |
1392 | TYPE_CODE (utype) = TYPE_CODE_ARRAY; | |
1ab3bf1b | 1393 | TYPE_TARGET_TYPE (utype) = |
bf229b4e | 1394 | dwarf_fundamental_type (current_objfile, FT_INTEGER); |
af213624 | 1395 | TYPE_LENGTH (utype) = 1 * TYPE_LENGTH (TYPE_TARGET_TYPE (utype)); |
35f5886e FF |
1396 | } |
1397 | else | |
1398 | { | |
13b5a7ff | 1399 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) |
af213624 | 1400 | { |
4ed3a9ea | 1401 | alloc_utype (dip -> die_ref, type); |
af213624 FF |
1402 | } |
1403 | else | |
1404 | { | |
1405 | TYPE_CODE (utype) = TYPE_CODE_ARRAY; | |
1406 | TYPE_LENGTH (utype) = TYPE_LENGTH (type); | |
1407 | TYPE_TARGET_TYPE (utype) = TYPE_TARGET_TYPE (type); | |
1408 | } | |
35f5886e FF |
1409 | } |
1410 | } | |
1411 | } | |
1412 | ||
1413 | /* | |
1414 | ||
9e4c1921 FF |
1415 | LOCAL FUNCTION |
1416 | ||
1417 | read_tag_pointer_type -- read TAG_pointer_type DIE | |
1418 | ||
1419 | SYNOPSIS | |
1420 | ||
1421 | static void read_tag_pointer_type (struct dieinfo *dip) | |
1422 | ||
1423 | DESCRIPTION | |
1424 | ||
1425 | Extract all information from a TAG_pointer_type DIE and add to | |
1426 | the user defined type vector. | |
1427 | */ | |
1428 | ||
1429 | static void | |
1ab3bf1b JG |
1430 | read_tag_pointer_type (dip) |
1431 | struct dieinfo *dip; | |
9e4c1921 FF |
1432 | { |
1433 | struct type *type; | |
1434 | struct type *utype; | |
9e4c1921 FF |
1435 | |
1436 | type = decode_die_type (dip); | |
13b5a7ff | 1437 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) |
9e4c1921 FF |
1438 | { |
1439 | utype = lookup_pointer_type (type); | |
4ed3a9ea | 1440 | alloc_utype (dip -> die_ref, utype); |
9e4c1921 FF |
1441 | } |
1442 | else | |
1443 | { | |
1444 | TYPE_TARGET_TYPE (utype) = type; | |
1445 | TYPE_POINTER_TYPE (type) = utype; | |
1446 | ||
1447 | /* We assume the machine has only one representation for pointers! */ | |
1448 | /* FIXME: This confuses host<->target data representations, and is a | |
1449 | poor assumption besides. */ | |
1450 | ||
1451 | TYPE_LENGTH (utype) = sizeof (char *); | |
1452 | TYPE_CODE (utype) = TYPE_CODE_PTR; | |
1453 | } | |
1454 | } | |
1455 | ||
1456 | /* | |
1457 | ||
35f5886e FF |
1458 | LOCAL FUNCTION |
1459 | ||
1460 | read_subroutine_type -- process TAG_subroutine_type dies | |
1461 | ||
1462 | SYNOPSIS | |
1463 | ||
1464 | static void read_subroutine_type (struct dieinfo *dip, char thisdie, | |
1465 | char *enddie) | |
1466 | ||
1467 | DESCRIPTION | |
1468 | ||
1469 | Handle DIES due to C code like: | |
1470 | ||
1471 | struct foo { | |
1472 | int (*funcp)(int a, long l); (Generates TAG_subroutine_type DIE) | |
1473 | int b; | |
1474 | }; | |
1475 | ||
1476 | NOTES | |
1477 | ||
1478 | The parameter DIES are currently ignored. See if gdb has a way to | |
1479 | include this info in it's type system, and decode them if so. Is | |
1480 | this what the type structure's "arg_types" field is for? (FIXME) | |
1481 | */ | |
1482 | ||
1483 | static void | |
1ab3bf1b JG |
1484 | read_subroutine_type (dip, thisdie, enddie) |
1485 | struct dieinfo *dip; | |
1486 | char *thisdie; | |
1487 | char *enddie; | |
35f5886e | 1488 | { |
af213624 FF |
1489 | struct type *type; /* Type that this function returns */ |
1490 | struct type *ftype; /* Function that returns above type */ | |
35f5886e | 1491 | |
af213624 FF |
1492 | /* Decode the type that this subroutine returns */ |
1493 | ||
35f5886e | 1494 | type = decode_die_type (dip); |
af213624 FF |
1495 | |
1496 | /* Check to see if we already have a partially constructed user | |
1497 | defined type for this DIE, from a forward reference. */ | |
1498 | ||
13b5a7ff | 1499 | if ((ftype = lookup_utype (dip -> die_ref)) == NULL) |
af213624 FF |
1500 | { |
1501 | /* This is the first reference to one of these types. Make | |
1502 | a new one and place it in the user defined types. */ | |
1503 | ftype = lookup_function_type (type); | |
4ed3a9ea | 1504 | alloc_utype (dip -> die_ref, ftype); |
af213624 FF |
1505 | } |
1506 | else | |
1507 | { | |
1508 | /* We have an existing partially constructed type, so bash it | |
1509 | into the correct type. */ | |
1510 | TYPE_TARGET_TYPE (ftype) = type; | |
1511 | TYPE_FUNCTION_TYPE (type) = ftype; | |
1512 | TYPE_LENGTH (ftype) = 1; | |
1513 | TYPE_CODE (ftype) = TYPE_CODE_FUNC; | |
1514 | } | |
35f5886e FF |
1515 | } |
1516 | ||
1517 | /* | |
1518 | ||
1519 | LOCAL FUNCTION | |
1520 | ||
1521 | read_enumeration -- process dies which define an enumeration | |
1522 | ||
1523 | SYNOPSIS | |
1524 | ||
1525 | static void read_enumeration (struct dieinfo *dip, char *thisdie, | |
1ab3bf1b | 1526 | char *enddie, struct objfile *objfile) |
35f5886e FF |
1527 | |
1528 | DESCRIPTION | |
1529 | ||
1530 | Given a pointer to a die which begins an enumeration, process all | |
1531 | the dies that define the members of the enumeration. | |
1532 | ||
1533 | NOTES | |
1534 | ||
1535 | Note that we need to call enum_type regardless of whether or not we | |
1536 | have a symbol, since we might have an enum without a tag name (thus | |
1537 | no symbol for the tagname). | |
1538 | */ | |
1539 | ||
1540 | static void | |
1ab3bf1b JG |
1541 | read_enumeration (dip, thisdie, enddie, objfile) |
1542 | struct dieinfo *dip; | |
1543 | char *thisdie; | |
1544 | char *enddie; | |
1545 | struct objfile *objfile; | |
35f5886e FF |
1546 | { |
1547 | struct type *type; | |
1548 | struct symbol *sym; | |
1549 | ||
1ab3bf1b | 1550 | type = enum_type (dip, objfile); |
95ff889e FF |
1551 | sym = new_symbol (dip, objfile); |
1552 | if (sym != NULL) | |
35f5886e FF |
1553 | { |
1554 | SYMBOL_TYPE (sym) = type; | |
95ff889e FF |
1555 | if (cu_language == language_cplus) |
1556 | { | |
1557 | synthesize_typedef (dip, objfile, type); | |
1558 | } | |
35f5886e FF |
1559 | } |
1560 | } | |
1561 | ||
1562 | /* | |
1563 | ||
1564 | LOCAL FUNCTION | |
1565 | ||
1566 | enum_type -- decode and return a type for an enumeration | |
1567 | ||
1568 | SYNOPSIS | |
1569 | ||
1ab3bf1b | 1570 | static type *enum_type (struct dieinfo *dip, struct objfile *objfile) |
35f5886e FF |
1571 | |
1572 | DESCRIPTION | |
1573 | ||
1574 | Given a pointer to a die information structure for the die which | |
1575 | starts an enumeration, process all the dies that define the members | |
1576 | of the enumeration and return a type pointer for the enumeration. | |
98618bf7 | 1577 | |
715cafcb FF |
1578 | At the same time, for each member of the enumeration, create a |
1579 | symbol for it with namespace VAR_NAMESPACE and class LOC_CONST, | |
1580 | and give it the type of the enumeration itself. | |
1581 | ||
1582 | NOTES | |
1583 | ||
98618bf7 FF |
1584 | Note that the DWARF specification explicitly mandates that enum |
1585 | constants occur in reverse order from the source program order, | |
1586 | for "consistency" and because this ordering is easier for many | |
1ab3bf1b | 1587 | compilers to generate. (Draft 6, sec 3.8.5, Enumeration type |
715cafcb FF |
1588 | Entries). Because gdb wants to see the enum members in program |
1589 | source order, we have to ensure that the order gets reversed while | |
98618bf7 | 1590 | we are processing them. |
35f5886e FF |
1591 | */ |
1592 | ||
1593 | static struct type * | |
1ab3bf1b JG |
1594 | enum_type (dip, objfile) |
1595 | struct dieinfo *dip; | |
1596 | struct objfile *objfile; | |
35f5886e FF |
1597 | { |
1598 | struct type *type; | |
1599 | struct nextfield { | |
1600 | struct nextfield *next; | |
1601 | struct field field; | |
1602 | }; | |
1603 | struct nextfield *list = NULL; | |
1604 | struct nextfield *new; | |
1605 | int nfields = 0; | |
1606 | int n; | |
35f5886e FF |
1607 | char *scan; |
1608 | char *listend; | |
13b5a7ff | 1609 | unsigned short blocksz; |
715cafcb | 1610 | struct symbol *sym; |
13b5a7ff | 1611 | int nbytes; |
35f5886e | 1612 | |
13b5a7ff | 1613 | if ((type = lookup_utype (dip -> die_ref)) == NULL) |
35f5886e | 1614 | { |
84ce6717 | 1615 | /* No forward references created an empty type, so install one now */ |
13b5a7ff | 1616 | type = alloc_utype (dip -> die_ref, NULL); |
35f5886e FF |
1617 | } |
1618 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
84ce6717 FF |
1619 | /* Some compilers try to be helpful by inventing "fake" names for |
1620 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1621 | Thanks, but no thanks... */ | |
715cafcb FF |
1622 | if (dip -> at_name != NULL |
1623 | && *dip -> at_name != '~' | |
1624 | && *dip -> at_name != '.') | |
35f5886e | 1625 | { |
95967e73 | 1626 | TYPE_NAME (type) = obconcat (&objfile -> type_obstack, "enum", |
1ab3bf1b | 1627 | " ", dip -> at_name); |
35f5886e | 1628 | } |
715cafcb | 1629 | if (dip -> at_byte_size != 0) |
35f5886e FF |
1630 | { |
1631 | TYPE_LENGTH (type) = dip -> at_byte_size; | |
35f5886e | 1632 | } |
35f5886e FF |
1633 | if ((scan = dip -> at_element_list) != NULL) |
1634 | { | |
768be6e1 FF |
1635 | if (dip -> short_element_list) |
1636 | { | |
13b5a7ff | 1637 | nbytes = attribute_size (AT_short_element_list); |
768be6e1 FF |
1638 | } |
1639 | else | |
1640 | { | |
13b5a7ff | 1641 | nbytes = attribute_size (AT_element_list); |
768be6e1 | 1642 | } |
13b5a7ff FF |
1643 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); |
1644 | listend = scan + nbytes + blocksz; | |
1645 | scan += nbytes; | |
35f5886e FF |
1646 | while (scan < listend) |
1647 | { | |
1648 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1649 | new -> next = list; | |
1650 | list = new; | |
1651 | list -> field.type = NULL; | |
1652 | list -> field.bitsize = 0; | |
13b5a7ff FF |
1653 | list -> field.bitpos = |
1654 | target_to_host (scan, TARGET_FT_LONG_SIZE (objfile), GET_SIGNED, | |
1655 | objfile); | |
1656 | scan += TARGET_FT_LONG_SIZE (objfile); | |
50e0dc41 FF |
1657 | list -> field.name = obsavestring (scan, strlen (scan), |
1658 | &objfile -> type_obstack); | |
35f5886e FF |
1659 | scan += strlen (scan) + 1; |
1660 | nfields++; | |
715cafcb | 1661 | /* Handcraft a new symbol for this enum member. */ |
1ab3bf1b | 1662 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
715cafcb | 1663 | sizeof (struct symbol)); |
4ed3a9ea | 1664 | memset (sym, 0, sizeof (struct symbol)); |
13b5a7ff FF |
1665 | SYMBOL_NAME (sym) = create_name (list -> field.name, |
1666 | &objfile->symbol_obstack); | |
715cafcb FF |
1667 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
1668 | SYMBOL_CLASS (sym) = LOC_CONST; | |
1669 | SYMBOL_TYPE (sym) = type; | |
1670 | SYMBOL_VALUE (sym) = list -> field.bitpos; | |
4d315a07 | 1671 | add_symbol_to_list (sym, list_in_scope); |
35f5886e | 1672 | } |
84ce6717 | 1673 | /* Now create the vector of fields, and record how big it is. This is |
0efe20a6 | 1674 | where we reverse the order, by pulling the members off the list in |
84ce6717 FF |
1675 | reverse order from how they were inserted. If we have no fields |
1676 | (this is apparently possible in C++) then skip building a field | |
1677 | vector. */ | |
1678 | if (nfields > 0) | |
1679 | { | |
1680 | TYPE_NFIELDS (type) = nfields; | |
1681 | TYPE_FIELDS (type) = (struct field *) | |
1ab3bf1b | 1682 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct field) * nfields); |
84ce6717 FF |
1683 | /* Copy the saved-up fields into the field vector. */ |
1684 | for (n = 0; (n < nfields) && (list != NULL); list = list -> next) | |
1685 | { | |
1686 | TYPE_FIELD (type, n++) = list -> field; | |
1687 | } | |
1688 | } | |
35f5886e | 1689 | } |
35f5886e FF |
1690 | return (type); |
1691 | } | |
1692 | ||
1693 | /* | |
1694 | ||
1695 | LOCAL FUNCTION | |
1696 | ||
1697 | read_func_scope -- process all dies within a function scope | |
1698 | ||
35f5886e FF |
1699 | DESCRIPTION |
1700 | ||
1701 | Process all dies within a given function scope. We are passed | |
1702 | a die information structure pointer DIP for the die which | |
1703 | starts the function scope, and pointers into the raw die data | |
1704 | that define the dies within the function scope. | |
1705 | ||
1706 | For now, we ignore lexical block scopes within the function. | |
1707 | The problem is that AT&T cc does not define a DWARF lexical | |
1708 | block scope for the function itself, while gcc defines a | |
1709 | lexical block scope for the function. We need to think about | |
1710 | how to handle this difference, or if it is even a problem. | |
1711 | (FIXME) | |
1712 | */ | |
1713 | ||
1714 | static void | |
1ab3bf1b JG |
1715 | read_func_scope (dip, thisdie, enddie, objfile) |
1716 | struct dieinfo *dip; | |
1717 | char *thisdie; | |
1718 | char *enddie; | |
1719 | struct objfile *objfile; | |
35f5886e | 1720 | { |
4d315a07 | 1721 | register struct context_stack *new; |
35f5886e | 1722 | |
5e2e79f8 FF |
1723 | if (objfile -> ei.entry_point >= dip -> at_low_pc && |
1724 | objfile -> ei.entry_point < dip -> at_high_pc) | |
35f5886e | 1725 | { |
5e2e79f8 FF |
1726 | objfile -> ei.entry_func_lowpc = dip -> at_low_pc; |
1727 | objfile -> ei.entry_func_highpc = dip -> at_high_pc; | |
35f5886e | 1728 | } |
4d315a07 | 1729 | if (STREQ (dip -> at_name, "main")) /* FIXME: hardwired name */ |
35f5886e | 1730 | { |
5e2e79f8 FF |
1731 | objfile -> ei.main_func_lowpc = dip -> at_low_pc; |
1732 | objfile -> ei.main_func_highpc = dip -> at_high_pc; | |
35f5886e | 1733 | } |
4d315a07 | 1734 | new = push_context (0, dip -> at_low_pc); |
1ab3bf1b | 1735 | new -> name = new_symbol (dip, objfile); |
4d315a07 | 1736 | list_in_scope = &local_symbols; |
13b5a7ff | 1737 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 FF |
1738 | new = pop_context (); |
1739 | /* Make a block for the local symbols within. */ | |
1740 | finish_block (new -> name, &local_symbols, new -> old_blocks, | |
1ab3bf1b | 1741 | new -> start_addr, dip -> at_high_pc, objfile); |
4d315a07 | 1742 | list_in_scope = &file_symbols; |
35f5886e FF |
1743 | } |
1744 | ||
2dbde378 FF |
1745 | |
1746 | /* | |
1747 | ||
1748 | LOCAL FUNCTION | |
1749 | ||
1750 | handle_producer -- process the AT_producer attribute | |
1751 | ||
1752 | DESCRIPTION | |
1753 | ||
1754 | Perform any operations that depend on finding a particular | |
1755 | AT_producer attribute. | |
1756 | ||
1757 | */ | |
1758 | ||
1759 | static void | |
1760 | handle_producer (producer) | |
1761 | char *producer; | |
1762 | { | |
1763 | ||
1764 | /* If this compilation unit was compiled with g++ or gcc, then set the | |
1765 | processing_gcc_compilation flag. */ | |
1766 | ||
1767 | processing_gcc_compilation = | |
1768 | STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER)) | |
93bb6e65 FF |
1769 | /* start-sanitize-chill */ |
1770 | || STREQN (producer, CHILL_PRODUCER, strlen (CHILL_PRODUCER)) | |
1771 | /* end-sanitize-chill */ | |
2dbde378 FF |
1772 | || STREQN (producer, GCC_PRODUCER, strlen (GCC_PRODUCER)); |
1773 | ||
1774 | /* Select a demangling style if we can identify the producer and if | |
1775 | the current style is auto. We leave the current style alone if it | |
1776 | is not auto. We also leave the demangling style alone if we find a | |
1777 | gcc (cc1) producer, as opposed to a g++ (cc1plus) producer. */ | |
1778 | ||
d23639b2 | 1779 | #if 1 /* Works, but is experimental. -fnf */ |
3dc755fb | 1780 | if (AUTO_DEMANGLING) |
2dbde378 FF |
1781 | { |
1782 | if (STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER))) | |
1783 | { | |
1784 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); | |
1785 | } | |
1786 | else if (STREQN (producer, LCC_PRODUCER, strlen (LCC_PRODUCER))) | |
1787 | { | |
1788 | set_demangling_style (LUCID_DEMANGLING_STYLE_STRING); | |
1789 | } | |
1790 | else if (STREQN (producer, CFRONT_PRODUCER, strlen (CFRONT_PRODUCER))) | |
1791 | { | |
1792 | set_demangling_style (CFRONT_DEMANGLING_STYLE_STRING); | |
1793 | } | |
1794 | } | |
1795 | #endif | |
1796 | } | |
1797 | ||
1798 | ||
35f5886e FF |
1799 | /* |
1800 | ||
1801 | LOCAL FUNCTION | |
1802 | ||
1803 | read_file_scope -- process all dies within a file scope | |
1804 | ||
35f5886e FF |
1805 | DESCRIPTION |
1806 | ||
1807 | Process all dies within a given file scope. We are passed a | |
1808 | pointer to the die information structure for the die which | |
1809 | starts the file scope, and pointers into the raw die data which | |
1810 | mark the range of dies within the file scope. | |
1811 | ||
1812 | When the partial symbol table is built, the file offset for the line | |
1813 | number table for each compilation unit is saved in the partial symbol | |
1814 | table entry for that compilation unit. As the symbols for each | |
1815 | compilation unit are read, the line number table is read into memory | |
1816 | and the variable lnbase is set to point to it. Thus all we have to | |
1817 | do is use lnbase to access the line number table for the current | |
1818 | compilation unit. | |
1819 | */ | |
1820 | ||
1821 | static void | |
1ab3bf1b JG |
1822 | read_file_scope (dip, thisdie, enddie, objfile) |
1823 | struct dieinfo *dip; | |
1824 | char *thisdie; | |
1825 | char *enddie; | |
1826 | struct objfile *objfile; | |
35f5886e FF |
1827 | { |
1828 | struct cleanup *back_to; | |
4d315a07 | 1829 | struct symtab *symtab; |
35f5886e | 1830 | |
5e2e79f8 FF |
1831 | if (objfile -> ei.entry_point >= dip -> at_low_pc && |
1832 | objfile -> ei.entry_point < dip -> at_high_pc) | |
35f5886e | 1833 | { |
5e2e79f8 FF |
1834 | objfile -> ei.entry_file_lowpc = dip -> at_low_pc; |
1835 | objfile -> ei.entry_file_highpc = dip -> at_high_pc; | |
35f5886e | 1836 | } |
95ff889e | 1837 | set_cu_language (dip); |
4d315a07 FF |
1838 | if (dip -> at_producer != NULL) |
1839 | { | |
2dbde378 | 1840 | handle_producer (dip -> at_producer); |
4d315a07 | 1841 | } |
35f5886e FF |
1842 | numutypes = (enddie - thisdie) / 4; |
1843 | utypes = (struct type **) xmalloc (numutypes * sizeof (struct type *)); | |
1844 | back_to = make_cleanup (free, utypes); | |
4ed3a9ea | 1845 | memset (utypes, 0, numutypes * sizeof (struct type *)); |
bf229b4e | 1846 | memset (ftypes, 0, FT_NUM_MEMBERS * sizeof (struct type *)); |
d4902ab0 | 1847 | start_symtab (dip -> at_name, dip -> at_comp_dir, dip -> at_low_pc); |
35f5886e | 1848 | decode_line_numbers (lnbase); |
13b5a7ff | 1849 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 | 1850 | symtab = end_symtab (dip -> at_high_pc, 0, 0, objfile); |
7b5d9650 | 1851 | if (symtab != NULL) |
4d315a07 | 1852 | { |
95ff889e | 1853 | symtab -> language = cu_language; |
7b5d9650 | 1854 | } |
35f5886e FF |
1855 | do_cleanups (back_to); |
1856 | utypes = NULL; | |
1857 | numutypes = 0; | |
1858 | } | |
1859 | ||
1860 | /* | |
1861 | ||
35f5886e FF |
1862 | LOCAL FUNCTION |
1863 | ||
1864 | process_dies -- process a range of DWARF Information Entries | |
1865 | ||
1866 | SYNOPSIS | |
1867 | ||
8b5b6fae FF |
1868 | static void process_dies (char *thisdie, char *enddie, |
1869 | struct objfile *objfile) | |
35f5886e FF |
1870 | |
1871 | DESCRIPTION | |
1872 | ||
1873 | Process all DIE's in a specified range. May be (and almost | |
1874 | certainly will be) called recursively. | |
1875 | */ | |
1876 | ||
1877 | static void | |
1ab3bf1b JG |
1878 | process_dies (thisdie, enddie, objfile) |
1879 | char *thisdie; | |
1880 | char *enddie; | |
1881 | struct objfile *objfile; | |
35f5886e FF |
1882 | { |
1883 | char *nextdie; | |
1884 | struct dieinfo di; | |
1885 | ||
1886 | while (thisdie < enddie) | |
1887 | { | |
95967e73 | 1888 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 1889 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
1890 | { |
1891 | break; | |
1892 | } | |
13b5a7ff | 1893 | else if (di.die_tag == TAG_padding) |
35f5886e | 1894 | { |
13b5a7ff | 1895 | nextdie = thisdie + di.die_length; |
35f5886e FF |
1896 | } |
1897 | else | |
1898 | { | |
95967e73 | 1899 | completedieinfo (&di, objfile); |
35f5886e FF |
1900 | if (di.at_sibling != 0) |
1901 | { | |
1902 | nextdie = dbbase + di.at_sibling - dbroff; | |
1903 | } | |
1904 | else | |
1905 | { | |
13b5a7ff | 1906 | nextdie = thisdie + di.die_length; |
35f5886e | 1907 | } |
13b5a7ff | 1908 | switch (di.die_tag) |
35f5886e FF |
1909 | { |
1910 | case TAG_compile_unit: | |
a048c8f5 | 1911 | read_file_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
1912 | break; |
1913 | case TAG_global_subroutine: | |
1914 | case TAG_subroutine: | |
2d6186f4 | 1915 | if (di.has_at_low_pc) |
35f5886e | 1916 | { |
a048c8f5 | 1917 | read_func_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
1918 | } |
1919 | break; | |
1920 | case TAG_lexical_block: | |
a048c8f5 | 1921 | read_lexical_block_scope (&di, thisdie, nextdie, objfile); |
35f5886e | 1922 | break; |
95ff889e | 1923 | case TAG_class_type: |
35f5886e FF |
1924 | case TAG_structure_type: |
1925 | case TAG_union_type: | |
8b5b6fae | 1926 | read_structure_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
1927 | break; |
1928 | case TAG_enumeration_type: | |
1ab3bf1b | 1929 | read_enumeration (&di, thisdie, nextdie, objfile); |
35f5886e FF |
1930 | break; |
1931 | case TAG_subroutine_type: | |
1932 | read_subroutine_type (&di, thisdie, nextdie); | |
1933 | break; | |
1934 | case TAG_array_type: | |
4d315a07 | 1935 | dwarf_read_array_type (&di); |
35f5886e | 1936 | break; |
9e4c1921 FF |
1937 | case TAG_pointer_type: |
1938 | read_tag_pointer_type (&di); | |
1939 | break; | |
35f5886e | 1940 | default: |
4ed3a9ea | 1941 | new_symbol (&di, objfile); |
35f5886e FF |
1942 | break; |
1943 | } | |
1944 | } | |
1945 | thisdie = nextdie; | |
1946 | } | |
1947 | } | |
1948 | ||
1949 | /* | |
1950 | ||
35f5886e FF |
1951 | LOCAL FUNCTION |
1952 | ||
1953 | decode_line_numbers -- decode a line number table fragment | |
1954 | ||
1955 | SYNOPSIS | |
1956 | ||
1957 | static void decode_line_numbers (char *tblscan, char *tblend, | |
1958 | long length, long base, long line, long pc) | |
1959 | ||
1960 | DESCRIPTION | |
1961 | ||
1962 | Translate the DWARF line number information to gdb form. | |
1963 | ||
1964 | The ".line" section contains one or more line number tables, one for | |
1965 | each ".line" section from the objects that were linked. | |
1966 | ||
1967 | The AT_stmt_list attribute for each TAG_source_file entry in the | |
1968 | ".debug" section contains the offset into the ".line" section for the | |
1969 | start of the table for that file. | |
1970 | ||
1971 | The table itself has the following structure: | |
1972 | ||
1973 | <table length><base address><source statement entry> | |
1974 | 4 bytes 4 bytes 10 bytes | |
1975 | ||
1976 | The table length is the total size of the table, including the 4 bytes | |
1977 | for the length information. | |
1978 | ||
1979 | The base address is the address of the first instruction generated | |
1980 | for the source file. | |
1981 | ||
1982 | Each source statement entry has the following structure: | |
1983 | ||
1984 | <line number><statement position><address delta> | |
1985 | 4 bytes 2 bytes 4 bytes | |
1986 | ||
1987 | The line number is relative to the start of the file, starting with | |
1988 | line 1. | |
1989 | ||
1990 | The statement position either -1 (0xFFFF) or the number of characters | |
1991 | from the beginning of the line to the beginning of the statement. | |
1992 | ||
1993 | The address delta is the difference between the base address and | |
1994 | the address of the first instruction for the statement. | |
1995 | ||
1996 | Note that we must copy the bytes from the packed table to our local | |
1997 | variables before attempting to use them, to avoid alignment problems | |
1998 | on some machines, particularly RISC processors. | |
1999 | ||
2000 | BUGS | |
2001 | ||
2002 | Does gdb expect the line numbers to be sorted? They are now by | |
2003 | chance/luck, but are not required to be. (FIXME) | |
2004 | ||
2005 | The line with number 0 is unused, gdb apparently can discover the | |
2006 | span of the last line some other way. How? (FIXME) | |
2007 | */ | |
2008 | ||
2009 | static void | |
1ab3bf1b JG |
2010 | decode_line_numbers (linetable) |
2011 | char *linetable; | |
35f5886e FF |
2012 | { |
2013 | char *tblscan; | |
2014 | char *tblend; | |
13b5a7ff FF |
2015 | unsigned long length; |
2016 | unsigned long base; | |
2017 | unsigned long line; | |
2018 | unsigned long pc; | |
35f5886e FF |
2019 | |
2020 | if (linetable != NULL) | |
2021 | { | |
2022 | tblscan = tblend = linetable; | |
13b5a7ff FF |
2023 | length = target_to_host (tblscan, SIZEOF_LINETBL_LENGTH, GET_UNSIGNED, |
2024 | current_objfile); | |
2025 | tblscan += SIZEOF_LINETBL_LENGTH; | |
35f5886e | 2026 | tblend += length; |
13b5a7ff FF |
2027 | base = target_to_host (tblscan, TARGET_FT_POINTER_SIZE (objfile), |
2028 | GET_UNSIGNED, current_objfile); | |
2029 | tblscan += TARGET_FT_POINTER_SIZE (objfile); | |
35f5886e | 2030 | base += baseaddr; |
35f5886e FF |
2031 | while (tblscan < tblend) |
2032 | { | |
13b5a7ff FF |
2033 | line = target_to_host (tblscan, SIZEOF_LINETBL_LINENO, GET_UNSIGNED, |
2034 | current_objfile); | |
2035 | tblscan += SIZEOF_LINETBL_LINENO + SIZEOF_LINETBL_STMT; | |
2036 | pc = target_to_host (tblscan, SIZEOF_LINETBL_DELTA, GET_UNSIGNED, | |
2037 | current_objfile); | |
2038 | tblscan += SIZEOF_LINETBL_DELTA; | |
35f5886e | 2039 | pc += base; |
13b5a7ff | 2040 | if (line != 0) |
35f5886e | 2041 | { |
4d315a07 | 2042 | record_line (current_subfile, line, pc); |
35f5886e FF |
2043 | } |
2044 | } | |
2045 | } | |
2046 | } | |
2047 | ||
2048 | /* | |
2049 | ||
35f5886e FF |
2050 | LOCAL FUNCTION |
2051 | ||
2052 | locval -- compute the value of a location attribute | |
2053 | ||
2054 | SYNOPSIS | |
2055 | ||
2056 | static int locval (char *loc) | |
2057 | ||
2058 | DESCRIPTION | |
2059 | ||
2060 | Given pointer to a string of bytes that define a location, compute | |
2061 | the location and return the value. | |
2062 | ||
2063 | When computing values involving the current value of the frame pointer, | |
2064 | the value zero is used, which results in a value relative to the frame | |
2065 | pointer, rather than the absolute value. This is what GDB wants | |
2066 | anyway. | |
2067 | ||
2068 | When the result is a register number, the global isreg flag is set, | |
2069 | otherwise it is cleared. This is a kludge until we figure out a better | |
2070 | way to handle the problem. Gdb's design does not mesh well with the | |
2071 | DWARF notion of a location computing interpreter, which is a shame | |
2072 | because the flexibility goes unused. | |
2073 | ||
2074 | NOTES | |
2075 | ||
2076 | Note that stack[0] is unused except as a default error return. | |
2077 | Note that stack overflow is not yet handled. | |
2078 | */ | |
2079 | ||
2080 | static int | |
1ab3bf1b JG |
2081 | locval (loc) |
2082 | char *loc; | |
35f5886e FF |
2083 | { |
2084 | unsigned short nbytes; | |
13b5a7ff FF |
2085 | unsigned short locsize; |
2086 | auto long stack[64]; | |
35f5886e FF |
2087 | int stacki; |
2088 | char *end; | |
2089 | long regno; | |
13b5a7ff FF |
2090 | int loc_atom_code; |
2091 | int loc_value_size; | |
35f5886e | 2092 | |
13b5a7ff FF |
2093 | nbytes = attribute_size (AT_location); |
2094 | locsize = target_to_host (loc, nbytes, GET_UNSIGNED, current_objfile); | |
2095 | loc += nbytes; | |
2096 | end = loc + locsize; | |
35f5886e FF |
2097 | stacki = 0; |
2098 | stack[stacki] = 0; | |
2099 | isreg = 0; | |
a5bd5ba6 | 2100 | offreg = 0; |
13b5a7ff FF |
2101 | loc_value_size = TARGET_FT_LONG_SIZE (current_objfile); |
2102 | while (loc < end) | |
35f5886e | 2103 | { |
13b5a7ff FF |
2104 | loc_atom_code = target_to_host (loc, SIZEOF_LOC_ATOM_CODE, GET_UNSIGNED, |
2105 | current_objfile); | |
2106 | loc += SIZEOF_LOC_ATOM_CODE; | |
2107 | switch (loc_atom_code) | |
2108 | { | |
2109 | case 0: | |
2110 | /* error */ | |
2111 | loc = end; | |
2112 | break; | |
2113 | case OP_REG: | |
2114 | /* push register (number) */ | |
2115 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2116 | GET_UNSIGNED, current_objfile); | |
2117 | loc += loc_value_size; | |
2118 | isreg = 1; | |
2119 | break; | |
2120 | case OP_BASEREG: | |
2121 | /* push value of register (number) */ | |
2122 | /* Actually, we compute the value as if register has 0 */ | |
2123 | offreg = 1; | |
2124 | regno = target_to_host (loc, loc_value_size, GET_UNSIGNED, | |
2125 | current_objfile); | |
2126 | loc += loc_value_size; | |
2127 | if (regno == R_FP) | |
2128 | { | |
2129 | stack[++stacki] = 0; | |
2130 | } | |
2131 | else | |
2132 | { | |
2133 | stack[++stacki] = 0; | |
2134 | SQUAWK (("BASEREG %d not handled!", regno)); | |
2135 | } | |
2136 | break; | |
2137 | case OP_ADDR: | |
2138 | /* push address (relocated address) */ | |
2139 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2140 | GET_UNSIGNED, current_objfile); | |
2141 | loc += loc_value_size; | |
2142 | break; | |
2143 | case OP_CONST: | |
2144 | /* push constant (number) FIXME: signed or unsigned! */ | |
2145 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
2146 | GET_SIGNED, current_objfile); | |
2147 | loc += loc_value_size; | |
2148 | break; | |
2149 | case OP_DEREF2: | |
2150 | /* pop, deref and push 2 bytes (as a long) */ | |
2151 | SQUAWK (("OP_DEREF2 address 0x%x not handled", stack[stacki])); | |
2152 | break; | |
2153 | case OP_DEREF4: /* pop, deref and push 4 bytes (as a long) */ | |
2154 | SQUAWK (("OP_DEREF4 address 0x%x not handled", stack[stacki])); | |
2155 | break; | |
2156 | case OP_ADD: /* pop top 2 items, add, push result */ | |
2157 | stack[stacki - 1] += stack[stacki]; | |
2158 | stacki--; | |
2159 | break; | |
2160 | } | |
35f5886e FF |
2161 | } |
2162 | return (stack[stacki]); | |
2163 | } | |
2164 | ||
2165 | /* | |
2166 | ||
2167 | LOCAL FUNCTION | |
2168 | ||
2169 | read_ofile_symtab -- build a full symtab entry from chunk of DIE's | |
2170 | ||
2171 | SYNOPSIS | |
2172 | ||
a048c8f5 | 2173 | static struct symtab *read_ofile_symtab (struct partial_symtab *pst) |
35f5886e FF |
2174 | |
2175 | DESCRIPTION | |
2176 | ||
1ab3bf1b JG |
2177 | When expanding a partial symbol table entry to a full symbol table |
2178 | entry, this is the function that gets called to read in the symbols | |
2179 | for the compilation unit. | |
2180 | ||
2181 | Returns a pointer to the newly constructed symtab (which is now | |
2182 | the new first one on the objfile's symtab list). | |
35f5886e FF |
2183 | */ |
2184 | ||
2185 | static struct symtab * | |
1ab3bf1b JG |
2186 | read_ofile_symtab (pst) |
2187 | struct partial_symtab *pst; | |
35f5886e FF |
2188 | { |
2189 | struct cleanup *back_to; | |
13b5a7ff | 2190 | unsigned long lnsize; |
d5931d79 | 2191 | file_ptr foffset; |
1ab3bf1b | 2192 | bfd *abfd; |
13b5a7ff | 2193 | char lnsizedata[SIZEOF_LINETBL_LENGTH]; |
1ab3bf1b JG |
2194 | |
2195 | abfd = pst -> objfile -> obfd; | |
2196 | current_objfile = pst -> objfile; | |
2197 | ||
35f5886e FF |
2198 | /* Allocate a buffer for the entire chunk of DIE's for this compilation |
2199 | unit, seek to the location in the file, and read in all the DIE's. */ | |
2200 | ||
2201 | diecount = 0; | |
4090fe1c FF |
2202 | dbsize = DBLENGTH (pst); |
2203 | dbbase = xmalloc (dbsize); | |
35f5886e FF |
2204 | dbroff = DBROFF(pst); |
2205 | foffset = DBFOFF(pst) + dbroff; | |
2670f34d JG |
2206 | base_section_offsets = pst->section_offsets; |
2207 | baseaddr = ANOFFSET (pst->section_offsets, 0); | |
d5931d79 | 2208 | if (bfd_seek (abfd, foffset, L_SET) || |
4090fe1c | 2209 | (bfd_read (dbbase, dbsize, 1, abfd) != dbsize)) |
35f5886e FF |
2210 | { |
2211 | free (dbbase); | |
2212 | error ("can't read DWARF data"); | |
2213 | } | |
2214 | back_to = make_cleanup (free, dbbase); | |
2215 | ||
2216 | /* If there is a line number table associated with this compilation unit | |
13b5a7ff FF |
2217 | then read the size of this fragment in bytes, from the fragment itself. |
2218 | Allocate a buffer for the fragment and read it in for future | |
35f5886e FF |
2219 | processing. */ |
2220 | ||
2221 | lnbase = NULL; | |
2222 | if (LNFOFF (pst)) | |
2223 | { | |
d5931d79 | 2224 | if (bfd_seek (abfd, LNFOFF (pst), L_SET) || |
13b5a7ff FF |
2225 | (bfd_read ((PTR) lnsizedata, sizeof (lnsizedata), 1, abfd) != |
2226 | sizeof (lnsizedata))) | |
35f5886e FF |
2227 | { |
2228 | error ("can't read DWARF line number table size"); | |
2229 | } | |
13b5a7ff FF |
2230 | lnsize = target_to_host (lnsizedata, SIZEOF_LINETBL_LENGTH, |
2231 | GET_UNSIGNED, pst -> objfile); | |
35f5886e | 2232 | lnbase = xmalloc (lnsize); |
d5931d79 | 2233 | if (bfd_seek (abfd, LNFOFF (pst), L_SET) || |
a048c8f5 | 2234 | (bfd_read (lnbase, lnsize, 1, abfd) != lnsize)) |
35f5886e FF |
2235 | { |
2236 | free (lnbase); | |
2237 | error ("can't read DWARF line numbers"); | |
2238 | } | |
2239 | make_cleanup (free, lnbase); | |
2240 | } | |
2241 | ||
4090fe1c | 2242 | process_dies (dbbase, dbbase + dbsize, pst -> objfile); |
35f5886e | 2243 | do_cleanups (back_to); |
1ab3bf1b JG |
2244 | current_objfile = NULL; |
2245 | return (pst -> objfile -> symtabs); | |
35f5886e FF |
2246 | } |
2247 | ||
2248 | /* | |
2249 | ||
2250 | LOCAL FUNCTION | |
2251 | ||
2252 | psymtab_to_symtab_1 -- do grunt work for building a full symtab entry | |
2253 | ||
2254 | SYNOPSIS | |
2255 | ||
a048c8f5 | 2256 | static void psymtab_to_symtab_1 (struct partial_symtab *pst) |
35f5886e FF |
2257 | |
2258 | DESCRIPTION | |
2259 | ||
2260 | Called once for each partial symbol table entry that needs to be | |
2261 | expanded into a full symbol table entry. | |
2262 | ||
2263 | */ | |
2264 | ||
2265 | static void | |
1ab3bf1b JG |
2266 | psymtab_to_symtab_1 (pst) |
2267 | struct partial_symtab *pst; | |
35f5886e FF |
2268 | { |
2269 | int i; | |
d07734e3 | 2270 | struct cleanup *old_chain; |
35f5886e | 2271 | |
1ab3bf1b | 2272 | if (pst != NULL) |
35f5886e | 2273 | { |
1ab3bf1b | 2274 | if (pst->readin) |
35f5886e | 2275 | { |
318bf84f | 2276 | warning ("psymtab for %s already read in. Shouldn't happen.", |
1ab3bf1b JG |
2277 | pst -> filename); |
2278 | } | |
2279 | else | |
2280 | { | |
2281 | /* Read in all partial symtabs on which this one is dependent */ | |
2282 | for (i = 0; i < pst -> number_of_dependencies; i++) | |
2283 | { | |
2284 | if (!pst -> dependencies[i] -> readin) | |
2285 | { | |
2286 | /* Inform about additional files that need to be read in. */ | |
2287 | if (info_verbose) | |
2288 | { | |
2289 | fputs_filtered (" ", stdout); | |
2290 | wrap_here (""); | |
2291 | fputs_filtered ("and ", stdout); | |
2292 | wrap_here (""); | |
2293 | printf_filtered ("%s...", | |
2294 | pst -> dependencies[i] -> filename); | |
2295 | wrap_here (""); | |
2296 | fflush (stdout); /* Flush output */ | |
2297 | } | |
2298 | psymtab_to_symtab_1 (pst -> dependencies[i]); | |
2299 | } | |
2300 | } | |
2301 | if (DBLENGTH (pst)) /* Otherwise it's a dummy */ | |
2302 | { | |
d07734e3 FF |
2303 | buildsym_init (); |
2304 | old_chain = make_cleanup (really_free_pendings, 0); | |
1ab3bf1b JG |
2305 | pst -> symtab = read_ofile_symtab (pst); |
2306 | if (info_verbose) | |
2307 | { | |
2308 | printf_filtered ("%d DIE's, sorting...", diecount); | |
2309 | wrap_here (""); | |
2310 | fflush (stdout); | |
2311 | } | |
2312 | sort_symtab_syms (pst -> symtab); | |
d07734e3 | 2313 | do_cleanups (old_chain); |
1ab3bf1b JG |
2314 | } |
2315 | pst -> readin = 1; | |
35f5886e | 2316 | } |
35f5886e | 2317 | } |
35f5886e FF |
2318 | } |
2319 | ||
2320 | /* | |
2321 | ||
2322 | LOCAL FUNCTION | |
2323 | ||
2324 | dwarf_psymtab_to_symtab -- build a full symtab entry from partial one | |
2325 | ||
2326 | SYNOPSIS | |
2327 | ||
2328 | static void dwarf_psymtab_to_symtab (struct partial_symtab *pst) | |
2329 | ||
2330 | DESCRIPTION | |
2331 | ||
2332 | This is the DWARF support entry point for building a full symbol | |
2333 | table entry from a partial symbol table entry. We are passed a | |
2334 | pointer to the partial symbol table entry that needs to be expanded. | |
2335 | ||
2336 | */ | |
2337 | ||
2338 | static void | |
1ab3bf1b JG |
2339 | dwarf_psymtab_to_symtab (pst) |
2340 | struct partial_symtab *pst; | |
35f5886e | 2341 | { |
7d9884b9 | 2342 | |
1ab3bf1b | 2343 | if (pst != NULL) |
35f5886e | 2344 | { |
1ab3bf1b | 2345 | if (pst -> readin) |
35f5886e | 2346 | { |
318bf84f | 2347 | warning ("psymtab for %s already read in. Shouldn't happen.", |
1ab3bf1b | 2348 | pst -> filename); |
35f5886e | 2349 | } |
1ab3bf1b | 2350 | else |
35f5886e | 2351 | { |
1ab3bf1b JG |
2352 | if (DBLENGTH (pst) || pst -> number_of_dependencies) |
2353 | { | |
2354 | /* Print the message now, before starting serious work, to avoid | |
2355 | disconcerting pauses. */ | |
2356 | if (info_verbose) | |
2357 | { | |
2358 | printf_filtered ("Reading in symbols for %s...", | |
2359 | pst -> filename); | |
2360 | fflush (stdout); | |
2361 | } | |
2362 | ||
2363 | psymtab_to_symtab_1 (pst); | |
2364 | ||
2365 | #if 0 /* FIXME: Check to see what dbxread is doing here and see if | |
2366 | we need to do an equivalent or is this something peculiar to | |
2367 | stabs/a.out format. | |
2368 | Match with global symbols. This only needs to be done once, | |
2369 | after all of the symtabs and dependencies have been read in. | |
2370 | */ | |
2371 | scan_file_globals (pst -> objfile); | |
2372 | #endif | |
2373 | ||
2374 | /* Finish up the verbose info message. */ | |
2375 | if (info_verbose) | |
2376 | { | |
2377 | printf_filtered ("done.\n"); | |
2378 | fflush (stdout); | |
2379 | } | |
2380 | } | |
35f5886e FF |
2381 | } |
2382 | } | |
2383 | } | |
2384 | ||
2385 | /* | |
2386 | ||
2387 | LOCAL FUNCTION | |
2388 | ||
2389 | init_psymbol_list -- initialize storage for partial symbols | |
2390 | ||
2391 | SYNOPSIS | |
2392 | ||
1ab3bf1b | 2393 | static void init_psymbol_list (struct objfile *objfile, int total_symbols) |
35f5886e FF |
2394 | |
2395 | DESCRIPTION | |
2396 | ||
2397 | Initializes storage for all of the partial symbols that will be | |
2398 | created by dwarf_build_psymtabs and subsidiaries. | |
2399 | */ | |
2400 | ||
2401 | static void | |
1ab3bf1b JG |
2402 | init_psymbol_list (objfile, total_symbols) |
2403 | struct objfile *objfile; | |
2404 | int total_symbols; | |
35f5886e FF |
2405 | { |
2406 | /* Free any previously allocated psymbol lists. */ | |
2407 | ||
1ab3bf1b | 2408 | if (objfile -> global_psymbols.list) |
35f5886e | 2409 | { |
84ffdec2 | 2410 | mfree (objfile -> md, (PTR)objfile -> global_psymbols.list); |
35f5886e | 2411 | } |
1ab3bf1b | 2412 | if (objfile -> static_psymbols.list) |
35f5886e | 2413 | { |
84ffdec2 | 2414 | mfree (objfile -> md, (PTR)objfile -> static_psymbols.list); |
35f5886e FF |
2415 | } |
2416 | ||
2417 | /* Current best guess is that there are approximately a twentieth | |
2418 | of the total symbols (in a debugging file) are global or static | |
2419 | oriented symbols */ | |
2420 | ||
1ab3bf1b JG |
2421 | objfile -> global_psymbols.size = total_symbols / 10; |
2422 | objfile -> static_psymbols.size = total_symbols / 10; | |
2423 | objfile -> global_psymbols.next = | |
2424 | objfile -> global_psymbols.list = (struct partial_symbol *) | |
318bf84f | 2425 | xmmalloc (objfile -> md, objfile -> global_psymbols.size |
1ab3bf1b JG |
2426 | * sizeof (struct partial_symbol)); |
2427 | objfile -> static_psymbols.next = | |
2428 | objfile -> static_psymbols.list = (struct partial_symbol *) | |
318bf84f | 2429 | xmmalloc (objfile -> md, objfile -> static_psymbols.size |
1ab3bf1b | 2430 | * sizeof (struct partial_symbol)); |
35f5886e FF |
2431 | } |
2432 | ||
35f5886e FF |
2433 | /* |
2434 | ||
715cafcb FF |
2435 | LOCAL FUNCTION |
2436 | ||
2437 | add_enum_psymbol -- add enumeration members to partial symbol table | |
2438 | ||
2439 | DESCRIPTION | |
2440 | ||
2441 | Given pointer to a DIE that is known to be for an enumeration, | |
2442 | extract the symbolic names of the enumeration members and add | |
2443 | partial symbols for them. | |
2444 | */ | |
2445 | ||
2446 | static void | |
1ab3bf1b JG |
2447 | add_enum_psymbol (dip, objfile) |
2448 | struct dieinfo *dip; | |
2449 | struct objfile *objfile; | |
715cafcb FF |
2450 | { |
2451 | char *scan; | |
2452 | char *listend; | |
13b5a7ff FF |
2453 | unsigned short blocksz; |
2454 | int nbytes; | |
715cafcb FF |
2455 | |
2456 | if ((scan = dip -> at_element_list) != NULL) | |
2457 | { | |
2458 | if (dip -> short_element_list) | |
2459 | { | |
13b5a7ff | 2460 | nbytes = attribute_size (AT_short_element_list); |
715cafcb FF |
2461 | } |
2462 | else | |
2463 | { | |
13b5a7ff | 2464 | nbytes = attribute_size (AT_element_list); |
715cafcb | 2465 | } |
13b5a7ff FF |
2466 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); |
2467 | scan += nbytes; | |
2468 | listend = scan + blocksz; | |
715cafcb FF |
2469 | while (scan < listend) |
2470 | { | |
13b5a7ff | 2471 | scan += TARGET_FT_LONG_SIZE (objfile); |
b440b1e9 | 2472 | ADD_PSYMBOL_TO_LIST (scan, strlen (scan), VAR_NAMESPACE, LOC_CONST, |
1ab3bf1b | 2473 | objfile -> static_psymbols, 0); |
715cafcb FF |
2474 | scan += strlen (scan) + 1; |
2475 | } | |
2476 | } | |
2477 | } | |
2478 | ||
2479 | /* | |
2480 | ||
35f5886e FF |
2481 | LOCAL FUNCTION |
2482 | ||
2483 | add_partial_symbol -- add symbol to partial symbol table | |
2484 | ||
2485 | DESCRIPTION | |
2486 | ||
2487 | Given a DIE, if it is one of the types that we want to | |
2488 | add to a partial symbol table, finish filling in the die info | |
2489 | and then add a partial symbol table entry for it. | |
2490 | ||
95ff889e FF |
2491 | NOTES |
2492 | ||
2493 | The caller must ensure that the DIE has a valid name attribute. | |
35f5886e FF |
2494 | */ |
2495 | ||
2496 | static void | |
1ab3bf1b JG |
2497 | add_partial_symbol (dip, objfile) |
2498 | struct dieinfo *dip; | |
2499 | struct objfile *objfile; | |
35f5886e | 2500 | { |
13b5a7ff | 2501 | switch (dip -> die_tag) |
35f5886e FF |
2502 | { |
2503 | case TAG_global_subroutine: | |
1ab3bf1b JG |
2504 | record_minimal_symbol (dip -> at_name, dip -> at_low_pc, mst_text, |
2505 | objfile); | |
b440b1e9 | 2506 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2507 | VAR_NAMESPACE, LOC_BLOCK, |
2508 | objfile -> global_psymbols, | |
b440b1e9 | 2509 | dip -> at_low_pc); |
35f5886e FF |
2510 | break; |
2511 | case TAG_global_variable: | |
1ab3bf1b JG |
2512 | record_minimal_symbol (dip -> at_name, locval (dip -> at_location), |
2513 | mst_data, objfile); | |
b440b1e9 | 2514 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2515 | VAR_NAMESPACE, LOC_STATIC, |
2516 | objfile -> global_psymbols, | |
b440b1e9 | 2517 | 0); |
35f5886e FF |
2518 | break; |
2519 | case TAG_subroutine: | |
b440b1e9 | 2520 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2521 | VAR_NAMESPACE, LOC_BLOCK, |
2522 | objfile -> static_psymbols, | |
b440b1e9 | 2523 | dip -> at_low_pc); |
35f5886e FF |
2524 | break; |
2525 | case TAG_local_variable: | |
b440b1e9 | 2526 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2527 | VAR_NAMESPACE, LOC_STATIC, |
2528 | objfile -> static_psymbols, | |
b440b1e9 | 2529 | 0); |
35f5886e FF |
2530 | break; |
2531 | case TAG_typedef: | |
b440b1e9 | 2532 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2533 | VAR_NAMESPACE, LOC_TYPEDEF, |
2534 | objfile -> static_psymbols, | |
b440b1e9 | 2535 | 0); |
35f5886e | 2536 | break; |
95ff889e | 2537 | case TAG_class_type: |
35f5886e FF |
2538 | case TAG_structure_type: |
2539 | case TAG_union_type: | |
95ff889e | 2540 | case TAG_enumeration_type: |
b440b1e9 | 2541 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2542 | STRUCT_NAMESPACE, LOC_TYPEDEF, |
2543 | objfile -> static_psymbols, | |
b440b1e9 | 2544 | 0); |
95ff889e | 2545 | if (cu_language == language_cplus) |
715cafcb | 2546 | { |
95ff889e | 2547 | /* For C++, these implicitly act as typedefs as well. */ |
b440b1e9 | 2548 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
95ff889e | 2549 | VAR_NAMESPACE, LOC_TYPEDEF, |
1ab3bf1b | 2550 | objfile -> static_psymbols, |
b440b1e9 | 2551 | 0); |
715cafcb | 2552 | } |
715cafcb | 2553 | break; |
35f5886e FF |
2554 | } |
2555 | } | |
2556 | ||
2557 | /* | |
2558 | ||
2559 | LOCAL FUNCTION | |
2560 | ||
2561 | scan_partial_symbols -- scan DIE's within a single compilation unit | |
2562 | ||
2563 | DESCRIPTION | |
2564 | ||
2565 | Process the DIE's within a single compilation unit, looking for | |
2566 | interesting DIE's that contribute to the partial symbol table entry | |
a679650f | 2567 | for this compilation unit. |
35f5886e | 2568 | |
2d6186f4 FF |
2569 | NOTES |
2570 | ||
a679650f FF |
2571 | There are some DIE's that may appear both at file scope and within |
2572 | the scope of a function. We are only interested in the ones at file | |
2573 | scope, and the only way to tell them apart is to keep track of the | |
2574 | scope. For example, consider the test case: | |
2575 | ||
2576 | static int i; | |
2577 | main () { int j; } | |
2578 | ||
2579 | for which the relevant DWARF segment has the structure: | |
2580 | ||
2581 | 0x51: | |
2582 | 0x23 global subrtn sibling 0x9b | |
2583 | name main | |
2584 | fund_type FT_integer | |
2585 | low_pc 0x800004cc | |
2586 | high_pc 0x800004d4 | |
2587 | ||
2588 | 0x74: | |
2589 | 0x23 local var sibling 0x97 | |
2590 | name j | |
2591 | fund_type FT_integer | |
2592 | location OP_BASEREG 0xe | |
2593 | OP_CONST 0xfffffffc | |
2594 | OP_ADD | |
2595 | 0x97: | |
2596 | 0x4 | |
2597 | ||
2598 | 0x9b: | |
2599 | 0x1d local var sibling 0xb8 | |
2600 | name i | |
2601 | fund_type FT_integer | |
2602 | location OP_ADDR 0x800025dc | |
2603 | ||
2604 | 0xb8: | |
2605 | 0x4 | |
2606 | ||
2607 | We want to include the symbol 'i' in the partial symbol table, but | |
2608 | not the symbol 'j'. In essence, we want to skip all the dies within | |
2609 | the scope of a TAG_global_subroutine DIE. | |
2610 | ||
715cafcb FF |
2611 | Don't attempt to add anonymous structures or unions since they have |
2612 | no name. Anonymous enumerations however are processed, because we | |
2613 | want to extract their member names (the check for a tag name is | |
2614 | done later). | |
2d6186f4 | 2615 | |
715cafcb FF |
2616 | Also, for variables and subroutines, check that this is the place |
2617 | where the actual definition occurs, rather than just a reference | |
2618 | to an external. | |
35f5886e FF |
2619 | */ |
2620 | ||
2621 | static void | |
1ab3bf1b JG |
2622 | scan_partial_symbols (thisdie, enddie, objfile) |
2623 | char *thisdie; | |
2624 | char *enddie; | |
2625 | struct objfile *objfile; | |
35f5886e FF |
2626 | { |
2627 | char *nextdie; | |
a679650f | 2628 | char *temp; |
35f5886e FF |
2629 | struct dieinfo di; |
2630 | ||
2631 | while (thisdie < enddie) | |
2632 | { | |
95967e73 | 2633 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2634 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2635 | { |
2636 | break; | |
2637 | } | |
2638 | else | |
2639 | { | |
13b5a7ff | 2640 | nextdie = thisdie + di.die_length; |
715cafcb FF |
2641 | /* To avoid getting complete die information for every die, we |
2642 | only do it (below) for the cases we are interested in. */ | |
13b5a7ff | 2643 | switch (di.die_tag) |
35f5886e FF |
2644 | { |
2645 | case TAG_global_subroutine: | |
35f5886e | 2646 | case TAG_subroutine: |
a679650f FF |
2647 | completedieinfo (&di, objfile); |
2648 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2649 | { | |
2650 | add_partial_symbol (&di, objfile); | |
2651 | /* If there is a sibling attribute, adjust the nextdie | |
2652 | pointer to skip the entire scope of the subroutine. | |
2653 | Apply some sanity checking to make sure we don't | |
2654 | overrun or underrun the range of remaining DIE's */ | |
2655 | if (di.at_sibling != 0) | |
2656 | { | |
2657 | temp = dbbase + di.at_sibling - dbroff; | |
2658 | if ((temp < thisdie) || (temp >= enddie)) | |
2659 | { | |
2660 | dwarfwarn ("reference to DIE (0x%x) outside compilation unit", di.at_sibling); | |
2661 | } | |
2662 | else | |
2663 | { | |
2664 | nextdie = temp; | |
2665 | } | |
2666 | } | |
2667 | } | |
2668 | break; | |
2d6186f4 | 2669 | case TAG_global_variable: |
35f5886e | 2670 | case TAG_local_variable: |
95967e73 | 2671 | completedieinfo (&di, objfile); |
2d6186f4 FF |
2672 | if (di.at_name && (di.has_at_low_pc || di.at_location)) |
2673 | { | |
1ab3bf1b | 2674 | add_partial_symbol (&di, objfile); |
2d6186f4 FF |
2675 | } |
2676 | break; | |
35f5886e | 2677 | case TAG_typedef: |
95ff889e | 2678 | case TAG_class_type: |
35f5886e FF |
2679 | case TAG_structure_type: |
2680 | case TAG_union_type: | |
95967e73 | 2681 | completedieinfo (&di, objfile); |
2d6186f4 | 2682 | if (di.at_name) |
35f5886e | 2683 | { |
1ab3bf1b | 2684 | add_partial_symbol (&di, objfile); |
35f5886e FF |
2685 | } |
2686 | break; | |
715cafcb | 2687 | case TAG_enumeration_type: |
95967e73 | 2688 | completedieinfo (&di, objfile); |
95ff889e FF |
2689 | if (di.at_name) |
2690 | { | |
2691 | add_partial_symbol (&di, objfile); | |
2692 | } | |
2693 | add_enum_psymbol (&di, objfile); | |
715cafcb | 2694 | break; |
35f5886e FF |
2695 | } |
2696 | } | |
2697 | thisdie = nextdie; | |
2698 | } | |
2699 | } | |
2700 | ||
2701 | /* | |
2702 | ||
2703 | LOCAL FUNCTION | |
2704 | ||
2705 | scan_compilation_units -- build a psymtab entry for each compilation | |
2706 | ||
2707 | DESCRIPTION | |
2708 | ||
2709 | This is the top level dwarf parsing routine for building partial | |
2710 | symbol tables. | |
2711 | ||
2712 | It scans from the beginning of the DWARF table looking for the first | |
2713 | TAG_compile_unit DIE, and then follows the sibling chain to locate | |
2714 | each additional TAG_compile_unit DIE. | |
2715 | ||
2716 | For each TAG_compile_unit DIE it creates a partial symtab structure, | |
2717 | calls a subordinate routine to collect all the compilation unit's | |
2718 | global DIE's, file scope DIEs, typedef DIEs, etc, and then links the | |
2719 | new partial symtab structure into the partial symbol table. It also | |
2720 | records the appropriate information in the partial symbol table entry | |
2721 | to allow the chunk of DIE's and line number table for this compilation | |
2722 | unit to be located and re-read later, to generate a complete symbol | |
2723 | table entry for the compilation unit. | |
2724 | ||
2725 | Thus it effectively partitions up a chunk of DIE's for multiple | |
2726 | compilation units into smaller DIE chunks and line number tables, | |
2727 | and associates them with a partial symbol table entry. | |
2728 | ||
2729 | NOTES | |
2730 | ||
2731 | If any compilation unit has no line number table associated with | |
2732 | it for some reason (a missing at_stmt_list attribute, rather than | |
2733 | just one with a value of zero, which is valid) then we ensure that | |
2734 | the recorded file offset is zero so that the routine which later | |
2735 | reads line number table fragments knows that there is no fragment | |
2736 | to read. | |
2737 | ||
2738 | RETURNS | |
2739 | ||
2740 | Returns no value. | |
2741 | ||
2742 | */ | |
2743 | ||
2744 | static void | |
d5931d79 | 2745 | scan_compilation_units (thisdie, enddie, dbfoff, lnoffset, objfile) |
1ab3bf1b JG |
2746 | char *thisdie; |
2747 | char *enddie; | |
d5931d79 JG |
2748 | file_ptr dbfoff; |
2749 | file_ptr lnoffset; | |
1ab3bf1b | 2750 | struct objfile *objfile; |
35f5886e FF |
2751 | { |
2752 | char *nextdie; | |
2753 | struct dieinfo di; | |
2754 | struct partial_symtab *pst; | |
2755 | int culength; | |
2756 | int curoff; | |
d5931d79 | 2757 | file_ptr curlnoffset; |
35f5886e FF |
2758 | |
2759 | while (thisdie < enddie) | |
2760 | { | |
95967e73 | 2761 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2762 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2763 | { |
2764 | break; | |
2765 | } | |
13b5a7ff | 2766 | else if (di.die_tag != TAG_compile_unit) |
35f5886e | 2767 | { |
13b5a7ff | 2768 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2769 | } |
2770 | else | |
2771 | { | |
95967e73 | 2772 | completedieinfo (&di, objfile); |
95ff889e | 2773 | set_cu_language (&di); |
35f5886e FF |
2774 | if (di.at_sibling != 0) |
2775 | { | |
2776 | nextdie = dbbase + di.at_sibling - dbroff; | |
2777 | } | |
2778 | else | |
2779 | { | |
13b5a7ff | 2780 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2781 | } |
2782 | curoff = thisdie - dbbase; | |
2783 | culength = nextdie - thisdie; | |
2d6186f4 | 2784 | curlnoffset = di.has_at_stmt_list ? lnoffset + di.at_stmt_list : 0; |
1ab3bf1b JG |
2785 | |
2786 | /* First allocate a new partial symbol table structure */ | |
2787 | ||
95ff889e FF |
2788 | pst = start_psymtab_common (objfile, base_section_offsets, |
2789 | di.at_name, di.at_low_pc, | |
1ab3bf1b JG |
2790 | objfile -> global_psymbols.next, |
2791 | objfile -> static_psymbols.next); | |
2792 | ||
2793 | pst -> texthigh = di.at_high_pc; | |
2794 | pst -> read_symtab_private = (char *) | |
2795 | obstack_alloc (&objfile -> psymbol_obstack, | |
2796 | sizeof (struct dwfinfo)); | |
2797 | DBFOFF (pst) = dbfoff; | |
2798 | DBROFF (pst) = curoff; | |
2799 | DBLENGTH (pst) = culength; | |
2800 | LNFOFF (pst) = curlnoffset; | |
2801 | pst -> read_symtab = dwarf_psymtab_to_symtab; | |
2802 | ||
2803 | /* Now look for partial symbols */ | |
2804 | ||
13b5a7ff | 2805 | scan_partial_symbols (thisdie + di.die_length, nextdie, objfile); |
1ab3bf1b JG |
2806 | |
2807 | pst -> n_global_syms = objfile -> global_psymbols.next - | |
2808 | (objfile -> global_psymbols.list + pst -> globals_offset); | |
2809 | pst -> n_static_syms = objfile -> static_psymbols.next - | |
2810 | (objfile -> static_psymbols.list + pst -> statics_offset); | |
2811 | sort_pst_symbols (pst); | |
35f5886e FF |
2812 | /* If there is already a psymtab or symtab for a file of this name, |
2813 | remove it. (If there is a symtab, more drastic things also | |
2814 | happen.) This happens in VxWorks. */ | |
2815 | free_named_symtabs (pst -> filename); | |
35f5886e FF |
2816 | } |
2817 | thisdie = nextdie; | |
2818 | } | |
2819 | } | |
2820 | ||
2821 | /* | |
2822 | ||
2823 | LOCAL FUNCTION | |
2824 | ||
2825 | new_symbol -- make a symbol table entry for a new symbol | |
2826 | ||
2827 | SYNOPSIS | |
2828 | ||
1ab3bf1b JG |
2829 | static struct symbol *new_symbol (struct dieinfo *dip, |
2830 | struct objfile *objfile) | |
35f5886e FF |
2831 | |
2832 | DESCRIPTION | |
2833 | ||
2834 | Given a pointer to a DWARF information entry, figure out if we need | |
2835 | to make a symbol table entry for it, and if so, create a new entry | |
2836 | and return a pointer to it. | |
2837 | */ | |
2838 | ||
2839 | static struct symbol * | |
1ab3bf1b JG |
2840 | new_symbol (dip, objfile) |
2841 | struct dieinfo *dip; | |
2842 | struct objfile *objfile; | |
35f5886e FF |
2843 | { |
2844 | struct symbol *sym = NULL; | |
2845 | ||
2846 | if (dip -> at_name != NULL) | |
2847 | { | |
1ab3bf1b | 2848 | sym = (struct symbol *) obstack_alloc (&objfile -> symbol_obstack, |
35f5886e | 2849 | sizeof (struct symbol)); |
4ed3a9ea | 2850 | memset (sym, 0, sizeof (struct symbol)); |
95ff889e FF |
2851 | SYMBOL_NAME (sym) = create_name (dip -> at_name, |
2852 | &objfile->symbol_obstack); | |
35f5886e FF |
2853 | /* default assumptions */ |
2854 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2855 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2856 | SYMBOL_TYPE (sym) = decode_die_type (dip); | |
13b5a7ff | 2857 | switch (dip -> die_tag) |
35f5886e FF |
2858 | { |
2859 | case TAG_label: | |
4d315a07 | 2860 | SYMBOL_VALUE (sym) = dip -> at_low_pc; |
35f5886e FF |
2861 | SYMBOL_CLASS (sym) = LOC_LABEL; |
2862 | break; | |
2863 | case TAG_global_subroutine: | |
2864 | case TAG_subroutine: | |
4d315a07 | 2865 | SYMBOL_VALUE (sym) = dip -> at_low_pc; |
35f5886e FF |
2866 | SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym)); |
2867 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
13b5a7ff | 2868 | if (dip -> die_tag == TAG_global_subroutine) |
35f5886e FF |
2869 | { |
2870 | add_symbol_to_list (sym, &global_symbols); | |
2871 | } | |
2872 | else | |
2873 | { | |
4d315a07 | 2874 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2875 | } |
2876 | break; | |
2877 | case TAG_global_variable: | |
35f5886e FF |
2878 | if (dip -> at_location != NULL) |
2879 | { | |
2880 | SYMBOL_VALUE (sym) = locval (dip -> at_location); | |
35f5886e FF |
2881 | add_symbol_to_list (sym, &global_symbols); |
2882 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2883 | SYMBOL_VALUE (sym) += baseaddr; | |
2884 | } | |
a5bd5ba6 FF |
2885 | break; |
2886 | case TAG_local_variable: | |
2887 | if (dip -> at_location != NULL) | |
35f5886e | 2888 | { |
a5bd5ba6 | 2889 | SYMBOL_VALUE (sym) = locval (dip -> at_location); |
4d315a07 | 2890 | add_symbol_to_list (sym, list_in_scope); |
a5bd5ba6 FF |
2891 | if (isreg) |
2892 | { | |
2893 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
2894 | } | |
2895 | else if (offreg) | |
35f5886e | 2896 | { |
a5bd5ba6 | 2897 | SYMBOL_CLASS (sym) = LOC_LOCAL; |
35f5886e FF |
2898 | } |
2899 | else | |
2900 | { | |
2901 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2902 | SYMBOL_VALUE (sym) += baseaddr; | |
2903 | } | |
2904 | } | |
2905 | break; | |
2906 | case TAG_formal_parameter: | |
2907 | if (dip -> at_location != NULL) | |
2908 | { | |
2909 | SYMBOL_VALUE (sym) = locval (dip -> at_location); | |
2910 | } | |
4d315a07 | 2911 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2912 | if (isreg) |
2913 | { | |
2914 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
2915 | } | |
2916 | else | |
2917 | { | |
2918 | SYMBOL_CLASS (sym) = LOC_ARG; | |
2919 | } | |
2920 | break; | |
2921 | case TAG_unspecified_parameters: | |
2922 | /* From varargs functions; gdb doesn't seem to have any interest in | |
2923 | this information, so just ignore it for now. (FIXME?) */ | |
2924 | break; | |
95ff889e | 2925 | case TAG_class_type: |
35f5886e FF |
2926 | case TAG_structure_type: |
2927 | case TAG_union_type: | |
2928 | case TAG_enumeration_type: | |
2929 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
2930 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
4d315a07 | 2931 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2932 | break; |
2933 | case TAG_typedef: | |
2934 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
2935 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
4d315a07 | 2936 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2937 | break; |
2938 | default: | |
2939 | /* Not a tag we recognize. Hopefully we aren't processing trash | |
2940 | data, but since we must specifically ignore things we don't | |
2941 | recognize, there is nothing else we should do at this point. */ | |
2942 | break; | |
2943 | } | |
2944 | } | |
2945 | return (sym); | |
2946 | } | |
2947 | ||
2948 | /* | |
2949 | ||
95ff889e FF |
2950 | LOCAL FUNCTION |
2951 | ||
2952 | synthesize_typedef -- make a symbol table entry for a "fake" typedef | |
2953 | ||
2954 | SYNOPSIS | |
2955 | ||
2956 | static void synthesize_typedef (struct dieinfo *dip, | |
2957 | struct objfile *objfile, | |
2958 | struct type *type); | |
2959 | ||
2960 | DESCRIPTION | |
2961 | ||
2962 | Given a pointer to a DWARF information entry, synthesize a typedef | |
2963 | for the name in the DIE, using the specified type. | |
2964 | ||
2965 | This is used for C++ class, structs, unions, and enumerations to | |
2966 | set up the tag name as a type. | |
2967 | ||
2968 | */ | |
2969 | ||
2970 | static void | |
2971 | synthesize_typedef (dip, objfile, type) | |
2972 | struct dieinfo *dip; | |
2973 | struct objfile *objfile; | |
2974 | struct type *type; | |
2975 | { | |
2976 | struct symbol *sym = NULL; | |
2977 | ||
2978 | if (dip -> at_name != NULL) | |
2979 | { | |
2980 | sym = (struct symbol *) | |
2981 | obstack_alloc (&objfile -> symbol_obstack, sizeof (struct symbol)); | |
2982 | memset (sym, 0, sizeof (struct symbol)); | |
2983 | SYMBOL_NAME (sym) = create_name (dip -> at_name, | |
2984 | &objfile->symbol_obstack); | |
2985 | SYMBOL_TYPE (sym) = type; | |
2986 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
2987 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2988 | add_symbol_to_list (sym, list_in_scope); | |
2989 | } | |
2990 | } | |
2991 | ||
2992 | /* | |
2993 | ||
35f5886e FF |
2994 | LOCAL FUNCTION |
2995 | ||
2996 | decode_mod_fund_type -- decode a modified fundamental type | |
2997 | ||
2998 | SYNOPSIS | |
2999 | ||
3000 | static struct type *decode_mod_fund_type (char *typedata) | |
3001 | ||
3002 | DESCRIPTION | |
3003 | ||
3004 | Decode a block of data containing a modified fundamental | |
3005 | type specification. TYPEDATA is a pointer to the block, | |
13b5a7ff FF |
3006 | which starts with a length containing the size of the rest |
3007 | of the block. At the end of the block is a fundmental type | |
3008 | code value that gives the fundamental type. Everything | |
35f5886e FF |
3009 | in between are type modifiers. |
3010 | ||
3011 | We simply compute the number of modifiers and call the general | |
3012 | function decode_modified_type to do the actual work. | |
3013 | */ | |
3014 | ||
3015 | static struct type * | |
1ab3bf1b JG |
3016 | decode_mod_fund_type (typedata) |
3017 | char *typedata; | |
35f5886e FF |
3018 | { |
3019 | struct type *typep = NULL; | |
3020 | unsigned short modcount; | |
13b5a7ff | 3021 | int nbytes; |
35f5886e FF |
3022 | |
3023 | /* Get the total size of the block, exclusive of the size itself */ | |
13b5a7ff FF |
3024 | |
3025 | nbytes = attribute_size (AT_mod_fund_type); | |
3026 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3027 | typedata += nbytes; | |
3028 | ||
35f5886e | 3029 | /* Deduct the size of the fundamental type bytes at the end of the block. */ |
13b5a7ff FF |
3030 | |
3031 | modcount -= attribute_size (AT_fund_type); | |
3032 | ||
35f5886e | 3033 | /* Now do the actual decoding */ |
13b5a7ff FF |
3034 | |
3035 | typep = decode_modified_type (typedata, modcount, AT_mod_fund_type); | |
35f5886e FF |
3036 | return (typep); |
3037 | } | |
3038 | ||
3039 | /* | |
3040 | ||
3041 | LOCAL FUNCTION | |
3042 | ||
3043 | decode_mod_u_d_type -- decode a modified user defined type | |
3044 | ||
3045 | SYNOPSIS | |
3046 | ||
3047 | static struct type *decode_mod_u_d_type (char *typedata) | |
3048 | ||
3049 | DESCRIPTION | |
3050 | ||
3051 | Decode a block of data containing a modified user defined | |
3052 | type specification. TYPEDATA is a pointer to the block, | |
3053 | which consists of a two byte length, containing the size | |
3054 | of the rest of the block. At the end of the block is a | |
3055 | four byte value that gives a reference to a user defined type. | |
3056 | Everything in between are type modifiers. | |
3057 | ||
3058 | We simply compute the number of modifiers and call the general | |
3059 | function decode_modified_type to do the actual work. | |
3060 | */ | |
3061 | ||
3062 | static struct type * | |
1ab3bf1b JG |
3063 | decode_mod_u_d_type (typedata) |
3064 | char *typedata; | |
35f5886e FF |
3065 | { |
3066 | struct type *typep = NULL; | |
3067 | unsigned short modcount; | |
13b5a7ff | 3068 | int nbytes; |
35f5886e FF |
3069 | |
3070 | /* Get the total size of the block, exclusive of the size itself */ | |
13b5a7ff FF |
3071 | |
3072 | nbytes = attribute_size (AT_mod_u_d_type); | |
3073 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
3074 | typedata += nbytes; | |
3075 | ||
35f5886e | 3076 | /* Deduct the size of the reference type bytes at the end of the block. */ |
13b5a7ff FF |
3077 | |
3078 | modcount -= attribute_size (AT_user_def_type); | |
3079 | ||
35f5886e | 3080 | /* Now do the actual decoding */ |
13b5a7ff FF |
3081 | |
3082 | typep = decode_modified_type (typedata, modcount, AT_mod_u_d_type); | |
35f5886e FF |
3083 | return (typep); |
3084 | } | |
3085 | ||
3086 | /* | |
3087 | ||
3088 | LOCAL FUNCTION | |
3089 | ||
3090 | decode_modified_type -- decode modified user or fundamental type | |
3091 | ||
3092 | SYNOPSIS | |
3093 | ||
1c92ca6f | 3094 | static struct type *decode_modified_type (char *modifiers, |
35f5886e FF |
3095 | unsigned short modcount, int mtype) |
3096 | ||
3097 | DESCRIPTION | |
3098 | ||
3099 | Decode a modified type, either a modified fundamental type or | |
3100 | a modified user defined type. MODIFIERS is a pointer to the | |
3101 | block of bytes that define MODCOUNT modifiers. Immediately | |
3102 | following the last modifier is a short containing the fundamental | |
3103 | type or a long containing the reference to the user defined | |
3104 | type. Which one is determined by MTYPE, which is either | |
3105 | AT_mod_fund_type or AT_mod_u_d_type to indicate what modified | |
3106 | type we are generating. | |
3107 | ||
3108 | We call ourself recursively to generate each modified type,` | |
3109 | until MODCOUNT reaches zero, at which point we have consumed | |
3110 | all the modifiers and generate either the fundamental type or | |
3111 | user defined type. When the recursion unwinds, each modifier | |
3112 | is applied in turn to generate the full modified type. | |
3113 | ||
3114 | NOTES | |
3115 | ||
3116 | If we find a modifier that we don't recognize, and it is not one | |
3117 | of those reserved for application specific use, then we issue a | |
3118 | warning and simply ignore the modifier. | |
3119 | ||
3120 | BUGS | |
3121 | ||
3122 | We currently ignore MOD_const and MOD_volatile. (FIXME) | |
3123 | ||
3124 | */ | |
3125 | ||
3126 | static struct type * | |
1ab3bf1b | 3127 | decode_modified_type (modifiers, modcount, mtype) |
1c92ca6f | 3128 | char *modifiers; |
1ab3bf1b JG |
3129 | unsigned int modcount; |
3130 | int mtype; | |
35f5886e FF |
3131 | { |
3132 | struct type *typep = NULL; | |
3133 | unsigned short fundtype; | |
13b5a7ff | 3134 | DIE_REF die_ref; |
1c92ca6f | 3135 | char modifier; |
13b5a7ff | 3136 | int nbytes; |
35f5886e FF |
3137 | |
3138 | if (modcount == 0) | |
3139 | { | |
3140 | switch (mtype) | |
3141 | { | |
3142 | case AT_mod_fund_type: | |
13b5a7ff FF |
3143 | nbytes = attribute_size (AT_fund_type); |
3144 | fundtype = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3145 | current_objfile); | |
35f5886e FF |
3146 | typep = decode_fund_type (fundtype); |
3147 | break; | |
3148 | case AT_mod_u_d_type: | |
13b5a7ff FF |
3149 | nbytes = attribute_size (AT_user_def_type); |
3150 | die_ref = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
3151 | current_objfile); | |
3152 | if ((typep = lookup_utype (die_ref)) == NULL) | |
35f5886e | 3153 | { |
13b5a7ff | 3154 | typep = alloc_utype (die_ref, NULL); |
35f5886e FF |
3155 | } |
3156 | break; | |
3157 | default: | |
3158 | SQUAWK (("botched modified type decoding (mtype 0x%x)", mtype)); | |
bf229b4e | 3159 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
35f5886e FF |
3160 | break; |
3161 | } | |
3162 | } | |
3163 | else | |
3164 | { | |
3165 | modifier = *modifiers++; | |
3166 | typep = decode_modified_type (modifiers, --modcount, mtype); | |
3167 | switch (modifier) | |
3168 | { | |
13b5a7ff FF |
3169 | case MOD_pointer_to: |
3170 | typep = lookup_pointer_type (typep); | |
3171 | break; | |
3172 | case MOD_reference_to: | |
3173 | typep = lookup_reference_type (typep); | |
3174 | break; | |
3175 | case MOD_const: | |
3176 | SQUAWK (("type modifier 'const' ignored")); /* FIXME */ | |
3177 | break; | |
3178 | case MOD_volatile: | |
3179 | SQUAWK (("type modifier 'volatile' ignored")); /* FIXME */ | |
3180 | break; | |
3181 | default: | |
1c92ca6f FF |
3182 | if (!(MOD_lo_user <= (unsigned char) modifier |
3183 | && (unsigned char) modifier <= MOD_hi_user)) | |
13b5a7ff | 3184 | { |
1c92ca6f FF |
3185 | SQUAWK (("unknown type modifier %u", |
3186 | (unsigned char) modifier)); | |
13b5a7ff FF |
3187 | } |
3188 | break; | |
35f5886e FF |
3189 | } |
3190 | } | |
3191 | return (typep); | |
3192 | } | |
3193 | ||
3194 | /* | |
3195 | ||
3196 | LOCAL FUNCTION | |
3197 | ||
3198 | decode_fund_type -- translate basic DWARF type to gdb base type | |
3199 | ||
3200 | DESCRIPTION | |
3201 | ||
3202 | Given an integer that is one of the fundamental DWARF types, | |
3203 | translate it to one of the basic internal gdb types and return | |
3204 | a pointer to the appropriate gdb type (a "struct type *"). | |
3205 | ||
3206 | NOTES | |
3207 | ||
3208 | If we encounter a fundamental type that we are unprepared to | |
3209 | deal with, and it is not in the range of those types defined | |
3210 | as application specific types, then we issue a warning and | |
1ab3bf1b | 3211 | treat the type as an "int". |
35f5886e FF |
3212 | */ |
3213 | ||
3214 | static struct type * | |
1ab3bf1b JG |
3215 | decode_fund_type (fundtype) |
3216 | unsigned int fundtype; | |
35f5886e FF |
3217 | { |
3218 | struct type *typep = NULL; | |
3219 | ||
3220 | switch (fundtype) | |
3221 | { | |
3222 | ||
3223 | case FT_void: | |
bf229b4e | 3224 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); |
35f5886e FF |
3225 | break; |
3226 | ||
1ab3bf1b | 3227 | case FT_boolean: /* Was FT_set in AT&T version */ |
bf229b4e | 3228 | typep = dwarf_fundamental_type (current_objfile, FT_BOOLEAN); |
1ab3bf1b JG |
3229 | break; |
3230 | ||
35f5886e | 3231 | case FT_pointer: /* (void *) */ |
bf229b4e | 3232 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); |
1ab3bf1b | 3233 | typep = lookup_pointer_type (typep); |
35f5886e FF |
3234 | break; |
3235 | ||
3236 | case FT_char: | |
bf229b4e | 3237 | typep = dwarf_fundamental_type (current_objfile, FT_CHAR); |
1ab3bf1b JG |
3238 | break; |
3239 | ||
35f5886e | 3240 | case FT_signed_char: |
bf229b4e | 3241 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_CHAR); |
1ab3bf1b JG |
3242 | break; |
3243 | ||
3244 | case FT_unsigned_char: | |
bf229b4e | 3245 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); |
35f5886e FF |
3246 | break; |
3247 | ||
3248 | case FT_short: | |
bf229b4e | 3249 | typep = dwarf_fundamental_type (current_objfile, FT_SHORT); |
1ab3bf1b JG |
3250 | break; |
3251 | ||
35f5886e | 3252 | case FT_signed_short: |
bf229b4e | 3253 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_SHORT); |
1ab3bf1b JG |
3254 | break; |
3255 | ||
3256 | case FT_unsigned_short: | |
bf229b4e | 3257 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); |
35f5886e FF |
3258 | break; |
3259 | ||
3260 | case FT_integer: | |
bf229b4e | 3261 | typep = dwarf_fundamental_type (current_objfile, FT_INTEGER); |
1ab3bf1b JG |
3262 | break; |
3263 | ||
35f5886e | 3264 | case FT_signed_integer: |
bf229b4e | 3265 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_INTEGER); |
1ab3bf1b JG |
3266 | break; |
3267 | ||
3268 | case FT_unsigned_integer: | |
bf229b4e | 3269 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); |
35f5886e FF |
3270 | break; |
3271 | ||
3272 | case FT_long: | |
bf229b4e | 3273 | typep = dwarf_fundamental_type (current_objfile, FT_LONG); |
1ab3bf1b JG |
3274 | break; |
3275 | ||
35f5886e | 3276 | case FT_signed_long: |
bf229b4e | 3277 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG); |
35f5886e FF |
3278 | break; |
3279 | ||
1ab3bf1b | 3280 | case FT_unsigned_long: |
bf229b4e | 3281 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG); |
35f5886e FF |
3282 | break; |
3283 | ||
1ab3bf1b | 3284 | case FT_long_long: |
bf229b4e | 3285 | typep = dwarf_fundamental_type (current_objfile, FT_LONG_LONG); |
35f5886e | 3286 | break; |
1ab3bf1b JG |
3287 | |
3288 | case FT_signed_long_long: | |
bf229b4e | 3289 | typep = dwarf_fundamental_type (current_objfile, FT_SIGNED_LONG_LONG); |
35f5886e | 3290 | break; |
1ab3bf1b JG |
3291 | |
3292 | case FT_unsigned_long_long: | |
bf229b4e | 3293 | typep = dwarf_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); |
35f5886e | 3294 | break; |
1ab3bf1b JG |
3295 | |
3296 | case FT_float: | |
bf229b4e | 3297 | typep = dwarf_fundamental_type (current_objfile, FT_FLOAT); |
35f5886e FF |
3298 | break; |
3299 | ||
1ab3bf1b | 3300 | case FT_dbl_prec_float: |
bf229b4e | 3301 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); |
35f5886e FF |
3302 | break; |
3303 | ||
3304 | case FT_ext_prec_float: | |
bf229b4e | 3305 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); |
35f5886e FF |
3306 | break; |
3307 | ||
3308 | case FT_complex: | |
bf229b4e | 3309 | typep = dwarf_fundamental_type (current_objfile, FT_COMPLEX); |
35f5886e FF |
3310 | break; |
3311 | ||
3312 | case FT_dbl_prec_complex: | |
bf229b4e | 3313 | typep = dwarf_fundamental_type (current_objfile, FT_DBL_PREC_COMPLEX); |
35f5886e FF |
3314 | break; |
3315 | ||
1ab3bf1b | 3316 | case FT_ext_prec_complex: |
bf229b4e | 3317 | typep = dwarf_fundamental_type (current_objfile, FT_EXT_PREC_COMPLEX); |
35f5886e | 3318 | break; |
1ab3bf1b | 3319 | |
35f5886e FF |
3320 | } |
3321 | ||
3322 | if ((typep == NULL) && !(FT_lo_user <= fundtype && fundtype <= FT_hi_user)) | |
3323 | { | |
3324 | SQUAWK (("unexpected fundamental type 0x%x", fundtype)); | |
bf229b4e | 3325 | typep = dwarf_fundamental_type (current_objfile, FT_VOID); |
35f5886e FF |
3326 | } |
3327 | ||
3328 | return (typep); | |
3329 | } | |
3330 | ||
3331 | /* | |
3332 | ||
3333 | LOCAL FUNCTION | |
3334 | ||
3335 | create_name -- allocate a fresh copy of a string on an obstack | |
3336 | ||
3337 | DESCRIPTION | |
3338 | ||
3339 | Given a pointer to a string and a pointer to an obstack, allocates | |
3340 | a fresh copy of the string on the specified obstack. | |
3341 | ||
3342 | */ | |
3343 | ||
3344 | static char * | |
1ab3bf1b JG |
3345 | create_name (name, obstackp) |
3346 | char *name; | |
3347 | struct obstack *obstackp; | |
35f5886e FF |
3348 | { |
3349 | int length; | |
3350 | char *newname; | |
3351 | ||
3352 | length = strlen (name) + 1; | |
3353 | newname = (char *) obstack_alloc (obstackp, length); | |
4ed3a9ea | 3354 | strcpy (newname, name); |
35f5886e FF |
3355 | return (newname); |
3356 | } | |
3357 | ||
3358 | /* | |
3359 | ||
3360 | LOCAL FUNCTION | |
3361 | ||
3362 | basicdieinfo -- extract the minimal die info from raw die data | |
3363 | ||
3364 | SYNOPSIS | |
3365 | ||
95967e73 FF |
3366 | void basicdieinfo (char *diep, struct dieinfo *dip, |
3367 | struct objfile *objfile) | |
35f5886e FF |
3368 | |
3369 | DESCRIPTION | |
3370 | ||
3371 | Given a pointer to raw DIE data, and a pointer to an instance of a | |
3372 | die info structure, this function extracts the basic information | |
3373 | from the DIE data required to continue processing this DIE, along | |
3374 | with some bookkeeping information about the DIE. | |
3375 | ||
3376 | The information we absolutely must have includes the DIE tag, | |
3377 | and the DIE length. If we need the sibling reference, then we | |
3378 | will have to call completedieinfo() to process all the remaining | |
3379 | DIE information. | |
3380 | ||
3381 | Note that since there is no guarantee that the data is properly | |
3382 | aligned in memory for the type of access required (indirection | |
95967e73 FF |
3383 | through anything other than a char pointer), and there is no |
3384 | guarantee that it is in the same byte order as the gdb host, | |
3385 | we call a function which deals with both alignment and byte | |
3386 | swapping issues. Possibly inefficient, but quite portable. | |
35f5886e FF |
3387 | |
3388 | We also take care of some other basic things at this point, such | |
3389 | as ensuring that the instance of the die info structure starts | |
3390 | out completely zero'd and that curdie is initialized for use | |
3391 | in error reporting if we have a problem with the current die. | |
3392 | ||
3393 | NOTES | |
3394 | ||
3395 | All DIE's must have at least a valid length, thus the minimum | |
13b5a7ff FF |
3396 | DIE size is SIZEOF_DIE_LENGTH. In order to have a valid tag, the |
3397 | DIE size must be at least SIZEOF_DIE_TAG larger, otherwise they | |
35f5886e FF |
3398 | are forced to be TAG_padding DIES. |
3399 | ||
13b5a7ff FF |
3400 | Padding DIES must be at least SIZEOF_DIE_LENGTH in length, implying |
3401 | that if a padding DIE is used for alignment and the amount needed is | |
3402 | less than SIZEOF_DIE_LENGTH, then the padding DIE has to be big | |
3403 | enough to align to the next alignment boundry. | |
4090fe1c FF |
3404 | |
3405 | We do some basic sanity checking here, such as verifying that the | |
3406 | length of the die would not cause it to overrun the recorded end of | |
3407 | the buffer holding the DIE info. If we find a DIE that is either | |
3408 | too small or too large, we force it's length to zero which should | |
3409 | cause the caller to take appropriate action. | |
35f5886e FF |
3410 | */ |
3411 | ||
3412 | static void | |
95967e73 | 3413 | basicdieinfo (dip, diep, objfile) |
1ab3bf1b JG |
3414 | struct dieinfo *dip; |
3415 | char *diep; | |
95967e73 | 3416 | struct objfile *objfile; |
35f5886e FF |
3417 | { |
3418 | curdie = dip; | |
4ed3a9ea | 3419 | memset (dip, 0, sizeof (struct dieinfo)); |
35f5886e | 3420 | dip -> die = diep; |
13b5a7ff FF |
3421 | dip -> die_ref = dbroff + (diep - dbbase); |
3422 | dip -> die_length = target_to_host (diep, SIZEOF_DIE_LENGTH, GET_UNSIGNED, | |
3423 | objfile); | |
4090fe1c FF |
3424 | if ((dip -> die_length < SIZEOF_DIE_LENGTH) || |
3425 | ((diep + dip -> die_length) > (dbbase + dbsize))) | |
35f5886e | 3426 | { |
13b5a7ff | 3427 | dwarfwarn ("malformed DIE, bad length (%d bytes)", dip -> die_length); |
4090fe1c | 3428 | dip -> die_length = 0; |
35f5886e | 3429 | } |
13b5a7ff | 3430 | else if (dip -> die_length < (SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG)) |
35f5886e | 3431 | { |
13b5a7ff | 3432 | dip -> die_tag = TAG_padding; |
35f5886e FF |
3433 | } |
3434 | else | |
3435 | { | |
13b5a7ff FF |
3436 | diep += SIZEOF_DIE_LENGTH; |
3437 | dip -> die_tag = target_to_host (diep, SIZEOF_DIE_TAG, GET_UNSIGNED, | |
3438 | objfile); | |
35f5886e FF |
3439 | } |
3440 | } | |
3441 | ||
3442 | /* | |
3443 | ||
3444 | LOCAL FUNCTION | |
3445 | ||
3446 | completedieinfo -- finish reading the information for a given DIE | |
3447 | ||
3448 | SYNOPSIS | |
3449 | ||
95967e73 | 3450 | void completedieinfo (struct dieinfo *dip, struct objfile *objfile) |
35f5886e FF |
3451 | |
3452 | DESCRIPTION | |
3453 | ||
3454 | Given a pointer to an already partially initialized die info structure, | |
3455 | scan the raw DIE data and finish filling in the die info structure | |
3456 | from the various attributes found. | |
3457 | ||
3458 | Note that since there is no guarantee that the data is properly | |
3459 | aligned in memory for the type of access required (indirection | |
95967e73 FF |
3460 | through anything other than a char pointer), and there is no |
3461 | guarantee that it is in the same byte order as the gdb host, | |
3462 | we call a function which deals with both alignment and byte | |
3463 | swapping issues. Possibly inefficient, but quite portable. | |
35f5886e FF |
3464 | |
3465 | NOTES | |
3466 | ||
3467 | Each time we are called, we increment the diecount variable, which | |
3468 | keeps an approximate count of the number of dies processed for | |
3469 | each compilation unit. This information is presented to the user | |
3470 | if the info_verbose flag is set. | |
3471 | ||
3472 | */ | |
3473 | ||
3474 | static void | |
95967e73 | 3475 | completedieinfo (dip, objfile) |
1ab3bf1b | 3476 | struct dieinfo *dip; |
95967e73 | 3477 | struct objfile *objfile; |
35f5886e FF |
3478 | { |
3479 | char *diep; /* Current pointer into raw DIE data */ | |
3480 | char *end; /* Terminate DIE scan here */ | |
3481 | unsigned short attr; /* Current attribute being scanned */ | |
3482 | unsigned short form; /* Form of the attribute */ | |
13b5a7ff | 3483 | int nbytes; /* Size of next field to read */ |
35f5886e FF |
3484 | |
3485 | diecount++; | |
3486 | diep = dip -> die; | |
13b5a7ff FF |
3487 | end = diep + dip -> die_length; |
3488 | diep += SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG; | |
35f5886e FF |
3489 | while (diep < end) |
3490 | { | |
13b5a7ff FF |
3491 | attr = target_to_host (diep, SIZEOF_ATTRIBUTE, GET_UNSIGNED, objfile); |
3492 | diep += SIZEOF_ATTRIBUTE; | |
3493 | if ((nbytes = attribute_size (attr)) == -1) | |
3494 | { | |
3495 | SQUAWK (("unknown attribute length, skipped remaining attributes"));; | |
3496 | diep = end; | |
3497 | continue; | |
3498 | } | |
35f5886e FF |
3499 | switch (attr) |
3500 | { | |
3501 | case AT_fund_type: | |
13b5a7ff FF |
3502 | dip -> at_fund_type = target_to_host (diep, nbytes, GET_UNSIGNED, |
3503 | objfile); | |
35f5886e FF |
3504 | break; |
3505 | case AT_ordering: | |
13b5a7ff FF |
3506 | dip -> at_ordering = target_to_host (diep, nbytes, GET_UNSIGNED, |
3507 | objfile); | |
35f5886e FF |
3508 | break; |
3509 | case AT_bit_offset: | |
13b5a7ff FF |
3510 | dip -> at_bit_offset = target_to_host (diep, nbytes, GET_UNSIGNED, |
3511 | objfile); | |
35f5886e | 3512 | break; |
35f5886e | 3513 | case AT_sibling: |
13b5a7ff FF |
3514 | dip -> at_sibling = target_to_host (diep, nbytes, GET_UNSIGNED, |
3515 | objfile); | |
35f5886e FF |
3516 | break; |
3517 | case AT_stmt_list: | |
13b5a7ff FF |
3518 | dip -> at_stmt_list = target_to_host (diep, nbytes, GET_UNSIGNED, |
3519 | objfile); | |
2d6186f4 | 3520 | dip -> has_at_stmt_list = 1; |
35f5886e FF |
3521 | break; |
3522 | case AT_low_pc: | |
13b5a7ff FF |
3523 | dip -> at_low_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3524 | objfile); | |
4d315a07 | 3525 | dip -> at_low_pc += baseaddr; |
2d6186f4 | 3526 | dip -> has_at_low_pc = 1; |
35f5886e FF |
3527 | break; |
3528 | case AT_high_pc: | |
13b5a7ff FF |
3529 | dip -> at_high_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3530 | objfile); | |
4d315a07 | 3531 | dip -> at_high_pc += baseaddr; |
35f5886e FF |
3532 | break; |
3533 | case AT_language: | |
13b5a7ff FF |
3534 | dip -> at_language = target_to_host (diep, nbytes, GET_UNSIGNED, |
3535 | objfile); | |
35f5886e FF |
3536 | break; |
3537 | case AT_user_def_type: | |
13b5a7ff FF |
3538 | dip -> at_user_def_type = target_to_host (diep, nbytes, |
3539 | GET_UNSIGNED, objfile); | |
35f5886e FF |
3540 | break; |
3541 | case AT_byte_size: | |
13b5a7ff FF |
3542 | dip -> at_byte_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3543 | objfile); | |
50055e94 | 3544 | dip -> has_at_byte_size = 1; |
35f5886e FF |
3545 | break; |
3546 | case AT_bit_size: | |
13b5a7ff FF |
3547 | dip -> at_bit_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3548 | objfile); | |
35f5886e FF |
3549 | break; |
3550 | case AT_member: | |
13b5a7ff FF |
3551 | dip -> at_member = target_to_host (diep, nbytes, GET_UNSIGNED, |
3552 | objfile); | |
35f5886e FF |
3553 | break; |
3554 | case AT_discr: | |
13b5a7ff FF |
3555 | dip -> at_discr = target_to_host (diep, nbytes, GET_UNSIGNED, |
3556 | objfile); | |
35f5886e | 3557 | break; |
35f5886e FF |
3558 | case AT_location: |
3559 | dip -> at_location = diep; | |
3560 | break; | |
3561 | case AT_mod_fund_type: | |
3562 | dip -> at_mod_fund_type = diep; | |
3563 | break; | |
3564 | case AT_subscr_data: | |
3565 | dip -> at_subscr_data = diep; | |
3566 | break; | |
3567 | case AT_mod_u_d_type: | |
3568 | dip -> at_mod_u_d_type = diep; | |
3569 | break; | |
35f5886e FF |
3570 | case AT_element_list: |
3571 | dip -> at_element_list = diep; | |
768be6e1 FF |
3572 | dip -> short_element_list = 0; |
3573 | break; | |
3574 | case AT_short_element_list: | |
3575 | dip -> at_element_list = diep; | |
3576 | dip -> short_element_list = 1; | |
35f5886e FF |
3577 | break; |
3578 | case AT_discr_value: | |
3579 | dip -> at_discr_value = diep; | |
3580 | break; | |
3581 | case AT_string_length: | |
3582 | dip -> at_string_length = diep; | |
3583 | break; | |
3584 | case AT_name: | |
3585 | dip -> at_name = diep; | |
3586 | break; | |
3587 | case AT_comp_dir: | |
d4902ab0 FF |
3588 | /* For now, ignore any "hostname:" portion, since gdb doesn't |
3589 | know how to deal with it. (FIXME). */ | |
3590 | dip -> at_comp_dir = strrchr (diep, ':'); | |
3591 | if (dip -> at_comp_dir != NULL) | |
3592 | { | |
3593 | dip -> at_comp_dir++; | |
3594 | } | |
3595 | else | |
3596 | { | |
3597 | dip -> at_comp_dir = diep; | |
3598 | } | |
35f5886e FF |
3599 | break; |
3600 | case AT_producer: | |
3601 | dip -> at_producer = diep; | |
3602 | break; | |
35f5886e | 3603 | case AT_start_scope: |
13b5a7ff FF |
3604 | dip -> at_start_scope = target_to_host (diep, nbytes, GET_UNSIGNED, |
3605 | objfile); | |
35f5886e FF |
3606 | break; |
3607 | case AT_stride_size: | |
13b5a7ff FF |
3608 | dip -> at_stride_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3609 | objfile); | |
35f5886e FF |
3610 | break; |
3611 | case AT_src_info: | |
13b5a7ff FF |
3612 | dip -> at_src_info = target_to_host (diep, nbytes, GET_UNSIGNED, |
3613 | objfile); | |
35f5886e FF |
3614 | break; |
3615 | case AT_prototyped: | |
13b5a7ff | 3616 | dip -> at_prototyped = diep; |
35f5886e | 3617 | break; |
35f5886e FF |
3618 | default: |
3619 | /* Found an attribute that we are unprepared to handle. However | |
3620 | it is specifically one of the design goals of DWARF that | |
3621 | consumers should ignore unknown attributes. As long as the | |
3622 | form is one that we recognize (so we know how to skip it), | |
3623 | we can just ignore the unknown attribute. */ | |
3624 | break; | |
3625 | } | |
13b5a7ff | 3626 | form = FORM_FROM_ATTR (attr); |
35f5886e FF |
3627 | switch (form) |
3628 | { | |
3629 | case FORM_DATA2: | |
13b5a7ff | 3630 | diep += 2; |
35f5886e FF |
3631 | break; |
3632 | case FORM_DATA4: | |
13b5a7ff FF |
3633 | case FORM_REF: |
3634 | diep += 4; | |
35f5886e FF |
3635 | break; |
3636 | case FORM_DATA8: | |
13b5a7ff | 3637 | diep += 8; |
35f5886e FF |
3638 | break; |
3639 | case FORM_ADDR: | |
13b5a7ff | 3640 | diep += TARGET_FT_POINTER_SIZE (objfile); |
35f5886e FF |
3641 | break; |
3642 | case FORM_BLOCK2: | |
13b5a7ff | 3643 | diep += 2 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); |
35f5886e FF |
3644 | break; |
3645 | case FORM_BLOCK4: | |
13b5a7ff | 3646 | diep += 4 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); |
35f5886e FF |
3647 | break; |
3648 | case FORM_STRING: | |
3649 | diep += strlen (diep) + 1; | |
3650 | break; | |
3651 | default: | |
13b5a7ff FF |
3652 | SQUAWK (("unknown attribute form (0x%x)", form)); |
3653 | SQUAWK (("unknown attribute length, skipped remaining attributes"));; | |
35f5886e FF |
3654 | diep = end; |
3655 | break; | |
3656 | } | |
3657 | } | |
3658 | } | |
95967e73 | 3659 | |
13b5a7ff | 3660 | /* |
95967e73 | 3661 | |
13b5a7ff FF |
3662 | LOCAL FUNCTION |
3663 | ||
3664 | target_to_host -- swap in target data to host | |
3665 | ||
3666 | SYNOPSIS | |
3667 | ||
3668 | target_to_host (char *from, int nbytes, int signextend, | |
3669 | struct objfile *objfile) | |
3670 | ||
3671 | DESCRIPTION | |
3672 | ||
3673 | Given pointer to data in target format in FROM, a byte count for | |
3674 | the size of the data in NBYTES, a flag indicating whether or not | |
3675 | the data is signed in SIGNEXTEND, and a pointer to the current | |
3676 | objfile in OBJFILE, convert the data to host format and return | |
3677 | the converted value. | |
3678 | ||
3679 | NOTES | |
3680 | ||
3681 | FIXME: If we read data that is known to be signed, and expect to | |
3682 | use it as signed data, then we need to explicitly sign extend the | |
3683 | result until the bfd library is able to do this for us. | |
3684 | ||
3685 | */ | |
3686 | ||
3687 | static unsigned long | |
3688 | target_to_host (from, nbytes, signextend, objfile) | |
95967e73 FF |
3689 | char *from; |
3690 | int nbytes; | |
13b5a7ff | 3691 | int signextend; /* FIXME: Unused */ |
95967e73 FF |
3692 | struct objfile *objfile; |
3693 | { | |
13b5a7ff | 3694 | unsigned long rtnval; |
95967e73 FF |
3695 | |
3696 | switch (nbytes) | |
3697 | { | |
95967e73 | 3698 | case 8: |
13b5a7ff | 3699 | rtnval = bfd_get_64 (objfile -> obfd, (bfd_byte *) from); |
95967e73 | 3700 | break; |
95967e73 | 3701 | case 4: |
13b5a7ff | 3702 | rtnval = bfd_get_32 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3703 | break; |
3704 | case 2: | |
13b5a7ff | 3705 | rtnval = bfd_get_16 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3706 | break; |
3707 | case 1: | |
13b5a7ff | 3708 | rtnval = bfd_get_8 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3709 | break; |
3710 | default: | |
13b5a7ff FF |
3711 | dwarfwarn ("no bfd support for %d byte data object", nbytes); |
3712 | rtnval = 0; | |
95967e73 FF |
3713 | break; |
3714 | } | |
13b5a7ff | 3715 | return (rtnval); |
95967e73 FF |
3716 | } |
3717 | ||
13b5a7ff FF |
3718 | /* |
3719 | ||
3720 | LOCAL FUNCTION | |
3721 | ||
3722 | attribute_size -- compute size of data for a DWARF attribute | |
3723 | ||
3724 | SYNOPSIS | |
3725 | ||
3726 | static int attribute_size (unsigned int attr) | |
3727 | ||
3728 | DESCRIPTION | |
3729 | ||
3730 | Given a DWARF attribute in ATTR, compute the size of the first | |
3731 | piece of data associated with this attribute and return that | |
3732 | size. | |
3733 | ||
3734 | Returns -1 for unrecognized attributes. | |
3735 | ||
3736 | */ | |
3737 | ||
3738 | static int | |
3739 | attribute_size (attr) | |
3740 | unsigned int attr; | |
3741 | { | |
3742 | int nbytes; /* Size of next data for this attribute */ | |
3743 | unsigned short form; /* Form of the attribute */ | |
3744 | ||
3745 | form = FORM_FROM_ATTR (attr); | |
3746 | switch (form) | |
3747 | { | |
3748 | case FORM_STRING: /* A variable length field is next */ | |
3749 | nbytes = 0; | |
3750 | break; | |
3751 | case FORM_DATA2: /* Next 2 byte field is the data itself */ | |
3752 | case FORM_BLOCK2: /* Next 2 byte field is a block length */ | |
3753 | nbytes = 2; | |
3754 | break; | |
3755 | case FORM_DATA4: /* Next 4 byte field is the data itself */ | |
3756 | case FORM_BLOCK4: /* Next 4 byte field is a block length */ | |
3757 | case FORM_REF: /* Next 4 byte field is a DIE offset */ | |
3758 | nbytes = 4; | |
3759 | break; | |
3760 | case FORM_DATA8: /* Next 8 byte field is the data itself */ | |
3761 | nbytes = 8; | |
3762 | break; | |
3763 | case FORM_ADDR: /* Next field size is target sizeof(void *) */ | |
3764 | nbytes = TARGET_FT_POINTER_SIZE (objfile); | |
3765 | break; | |
3766 | default: | |
3767 | SQUAWK (("unknown attribute form (0x%x)", form)); | |
3768 | nbytes = -1; | |
3769 | break; | |
3770 | } | |
3771 | return (nbytes); | |
3772 | } |