Commit | Line | Data |
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35f5886e | 1 | /* DWARF debugging format support for GDB. |
1ab3bf1b JG |
2 | Copyright (C) 1991, 1992 Free Software Foundation, Inc. |
3 | Written by Fred Fish at Cygnus Support. Portions based on dbxread.c, | |
35f5886e FF |
4 | mipsread.c, coffread.c, and dwarfread.c from a Data General SVR4 gdb port. |
5 | ||
6 | This file is part of GDB. | |
7 | ||
8 | This program is free software; you can redistribute it and/or modify | |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation; either version 2 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | This program is distributed in the hope that it will be useful, | |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
19 | along with this program; if not, write to the Free Software | |
20 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
21 | ||
22 | /* | |
23 | ||
24 | FIXME: Figure out how to get the frame pointer register number in the | |
25 | execution environment of the target. Remove R_FP kludge | |
26 | ||
27 | FIXME: Add generation of dependencies list to partial symtab code. | |
28 | ||
35f5886e FF |
29 | FIXME: Resolve minor differences between what information we put in the |
30 | partial symbol table and what dbxread puts in. For example, we don't yet | |
31 | put enum constants there. And dbxread seems to invent a lot of typedefs | |
32 | we never see. Use the new printpsym command to see the partial symbol table | |
33 | contents. | |
34 | ||
35f5886e FF |
35 | FIXME: Figure out a better way to tell gdb about the name of the function |
36 | contain the user's entry point (I.E. main()) | |
37 | ||
35f5886e FF |
38 | FIXME: See other FIXME's and "ifdef 0" scattered throughout the code for |
39 | other things to work on, if you get bored. :-) | |
40 | ||
41 | */ | |
4d315a07 | 42 | |
d747e0af | 43 | #include "defs.h" |
313fdead | 44 | #include <varargs.h> |
35f5886e | 45 | #include <fcntl.h> |
84ffdec2 | 46 | #include <string.h> |
35f5886e | 47 | |
35f5886e FF |
48 | #include "bfd.h" |
49 | #include "symtab.h" | |
1ab3bf1b | 50 | #include "gdbtypes.h" |
35f5886e | 51 | #include "symfile.h" |
5e2e79f8 | 52 | #include "objfiles.h" |
13b5a7ff | 53 | #include "libbfd.h" /* FIXME Secret Internal BFD stuff (bfd_read) */ |
f5f0679a | 54 | #include "elf/dwarf.h" |
4d315a07 | 55 | #include "buildsym.h" |
2dbde378 | 56 | #include "demangle.h" |
35f5886e FF |
57 | |
58 | #ifdef MAINTENANCE /* Define to 1 to compile in some maintenance stuff */ | |
59 | #define SQUAWK(stuff) dwarfwarn stuff | |
60 | #else | |
61 | #define SQUAWK(stuff) | |
62 | #endif | |
63 | ||
64 | #ifndef R_FP /* FIXME */ | |
65 | #define R_FP 14 /* Kludge to get frame pointer register number */ | |
66 | #endif | |
67 | ||
13b5a7ff | 68 | typedef unsigned int DIE_REF; /* Reference to a DIE */ |
35f5886e | 69 | |
4d315a07 FF |
70 | #ifndef GCC_PRODUCER |
71 | #define GCC_PRODUCER "GNU C " | |
72 | #endif | |
35f5886e | 73 | |
2dbde378 FF |
74 | #ifndef GPLUS_PRODUCER |
75 | #define GPLUS_PRODUCER "GNU C++ " | |
76 | #endif | |
77 | ||
78 | #ifndef LCC_PRODUCER | |
345e9ab8 | 79 | #define LCC_PRODUCER "NCR C/C++ " |
2dbde378 FF |
80 | #endif |
81 | ||
82 | #ifndef CFRONT_PRODUCER | |
83 | #define CFRONT_PRODUCER "CFRONT " /* A wild a** guess... */ | |
84 | #endif | |
85 | ||
35f5886e | 86 | #define STREQ(a,b) (strcmp(a,b)==0) |
4d315a07 | 87 | #define STREQN(a,b,n) (strncmp(a,b,n)==0) |
35f5886e | 88 | |
13b5a7ff FF |
89 | /* Flags to target_to_host() that tell whether or not the data object is |
90 | expected to be signed. Used, for example, when fetching a signed | |
91 | integer in the target environment which is used as a signed integer | |
92 | in the host environment, and the two environments have different sized | |
93 | ints. In this case, *somebody* has to sign extend the smaller sized | |
94 | int. */ | |
95 | ||
96 | #define GET_UNSIGNED 0 /* No sign extension required */ | |
97 | #define GET_SIGNED 1 /* Sign extension required */ | |
98 | ||
99 | /* Defines for things which are specified in the document "DWARF Debugging | |
100 | Information Format" published by UNIX International, Programming Languages | |
101 | SIG. These defines are based on revision 1.0.0, Jan 20, 1992. */ | |
102 | ||
103 | #define SIZEOF_DIE_LENGTH 4 | |
104 | #define SIZEOF_DIE_TAG 2 | |
105 | #define SIZEOF_ATTRIBUTE 2 | |
106 | #define SIZEOF_FORMAT_SPECIFIER 1 | |
107 | #define SIZEOF_FMT_FT 2 | |
108 | #define SIZEOF_LINETBL_LENGTH 4 | |
109 | #define SIZEOF_LINETBL_LINENO 4 | |
110 | #define SIZEOF_LINETBL_STMT 2 | |
111 | #define SIZEOF_LINETBL_DELTA 4 | |
112 | #define SIZEOF_LOC_ATOM_CODE 1 | |
113 | ||
114 | #define FORM_FROM_ATTR(attr) ((attr) & 0xF) /* Implicitly specified */ | |
115 | ||
116 | /* Macros that return the sizes of various types of data in the target | |
117 | environment. | |
118 | ||
2d6d969c FF |
119 | FIXME: Currently these are just compile time constants (as they are in |
120 | other parts of gdb as well). They need to be able to get the right size | |
121 | either from the bfd or possibly from the DWARF info. It would be nice if | |
122 | the DWARF producer inserted DIES that describe the fundamental types in | |
123 | the target environment into the DWARF info, similar to the way dbx stabs | |
124 | producers produce information about their fundamental types. */ | |
125 | ||
126 | #define TARGET_FT_POINTER_SIZE(objfile) (TARGET_PTR_BIT / TARGET_CHAR_BIT) | |
127 | #define TARGET_FT_LONG_SIZE(objfile) (TARGET_LONG_BIT / TARGET_CHAR_BIT) | |
95967e73 | 128 | |
768be6e1 FF |
129 | /* The Amiga SVR4 header file <dwarf.h> defines AT_element_list as a |
130 | FORM_BLOCK2, and this is the value emitted by the AT&T compiler. | |
131 | However, the Issue 2 DWARF specification from AT&T defines it as | |
132 | a FORM_BLOCK4, as does the latest specification from UI/PLSIG. | |
133 | For backwards compatibility with the AT&T compiler produced executables | |
134 | we define AT_short_element_list for this variant. */ | |
135 | ||
136 | #define AT_short_element_list (0x00f0|FORM_BLOCK2) | |
137 | ||
138 | /* External variables referenced. */ | |
139 | ||
35f5886e | 140 | extern int info_verbose; /* From main.c; nonzero => verbose */ |
318bf84f | 141 | extern char *warning_pre_print; /* From utils.c */ |
35f5886e FF |
142 | |
143 | /* The DWARF debugging information consists of two major pieces, | |
144 | one is a block of DWARF Information Entries (DIE's) and the other | |
145 | is a line number table. The "struct dieinfo" structure contains | |
146 | the information for a single DIE, the one currently being processed. | |
147 | ||
148 | In order to make it easier to randomly access the attribute fields | |
13b5a7ff | 149 | of the current DIE, which are specifically unordered within the DIE, |
35f5886e FF |
150 | each DIE is scanned and an instance of the "struct dieinfo" |
151 | structure is initialized. | |
152 | ||
153 | Initialization is done in two levels. The first, done by basicdieinfo(), | |
154 | just initializes those fields that are vital to deciding whether or not | |
155 | to use this DIE, how to skip past it, etc. The second, done by the | |
156 | function completedieinfo(), fills in the rest of the information. | |
157 | ||
158 | Attributes which have block forms are not interpreted at the time | |
159 | the DIE is scanned, instead we just save pointers to the start | |
160 | of their value fields. | |
161 | ||
162 | Some fields have a flag <name>_p that is set when the value of the | |
163 | field is valid (I.E. we found a matching attribute in the DIE). Since | |
164 | we may want to test for the presence of some attributes in the DIE, | |
2d6186f4 | 165 | such as AT_low_pc, without restricting the values of the field, |
35f5886e FF |
166 | we need someway to note that we found such an attribute. |
167 | ||
168 | */ | |
169 | ||
170 | typedef char BLOCK; | |
171 | ||
172 | struct dieinfo { | |
13b5a7ff FF |
173 | char * die; /* Pointer to the raw DIE data */ |
174 | unsigned long die_length; /* Length of the raw DIE data */ | |
175 | DIE_REF die_ref; /* Offset of this DIE */ | |
176 | unsigned short die_tag; /* Tag for this DIE */ | |
177 | unsigned long at_padding; | |
178 | unsigned long at_sibling; | |
179 | BLOCK * at_location; | |
180 | char * at_name; | |
181 | unsigned short at_fund_type; | |
182 | BLOCK * at_mod_fund_type; | |
183 | unsigned long at_user_def_type; | |
184 | BLOCK * at_mod_u_d_type; | |
185 | unsigned short at_ordering; | |
186 | BLOCK * at_subscr_data; | |
187 | unsigned long at_byte_size; | |
188 | unsigned short at_bit_offset; | |
189 | unsigned long at_bit_size; | |
190 | BLOCK * at_element_list; | |
191 | unsigned long at_stmt_list; | |
192 | unsigned long at_low_pc; | |
193 | unsigned long at_high_pc; | |
194 | unsigned long at_language; | |
195 | unsigned long at_member; | |
196 | unsigned long at_discr; | |
197 | BLOCK * at_discr_value; | |
13b5a7ff FF |
198 | BLOCK * at_string_length; |
199 | char * at_comp_dir; | |
200 | char * at_producer; | |
13b5a7ff FF |
201 | unsigned long at_start_scope; |
202 | unsigned long at_stride_size; | |
203 | unsigned long at_src_info; | |
204 | char * at_prototyped; | |
205 | unsigned int has_at_low_pc:1; | |
206 | unsigned int has_at_stmt_list:1; | |
50055e94 | 207 | unsigned int has_at_byte_size:1; |
13b5a7ff | 208 | unsigned int short_element_list:1; |
35f5886e FF |
209 | }; |
210 | ||
211 | static int diecount; /* Approximate count of dies for compilation unit */ | |
212 | static struct dieinfo *curdie; /* For warnings and such */ | |
213 | ||
214 | static char *dbbase; /* Base pointer to dwarf info */ | |
215 | static int dbroff; /* Relative offset from start of .debug section */ | |
216 | static char *lnbase; /* Base pointer to line section */ | |
217 | static int isreg; /* Kludge to identify register variables */ | |
a5bd5ba6 | 218 | static int offreg; /* Kludge to identify basereg references */ |
35f5886e | 219 | |
2670f34d JG |
220 | /* This value is added to each symbol value. FIXME: Generalize to |
221 | the section_offsets structure used by dbxread. */ | |
35f5886e FF |
222 | static CORE_ADDR baseaddr; /* Add to each symbol value */ |
223 | ||
2670f34d JG |
224 | /* The section offsets used in the current psymtab or symtab. FIXME, |
225 | only used to pass one value (baseaddr) at the moment. */ | |
226 | static struct section_offsets *base_section_offsets; | |
227 | ||
35f5886e FF |
228 | /* Each partial symbol table entry contains a pointer to private data for the |
229 | read_symtab() function to use when expanding a partial symbol table entry | |
230 | to a full symbol table entry. For DWARF debugging info, this data is | |
231 | contained in the following structure and macros are provided for easy | |
232 | access to the members given a pointer to a partial symbol table entry. | |
233 | ||
234 | dbfoff Always the absolute file offset to the start of the ".debug" | |
235 | section for the file containing the DIE's being accessed. | |
236 | ||
237 | dbroff Relative offset from the start of the ".debug" access to the | |
238 | first DIE to be accessed. When building the partial symbol | |
239 | table, this value will be zero since we are accessing the | |
240 | entire ".debug" section. When expanding a partial symbol | |
241 | table entry, this value will be the offset to the first | |
242 | DIE for the compilation unit containing the symbol that | |
243 | triggers the expansion. | |
244 | ||
245 | dblength The size of the chunk of DIE's being examined, in bytes. | |
246 | ||
247 | lnfoff The absolute file offset to the line table fragment. Ignored | |
248 | when building partial symbol tables, but used when expanding | |
249 | them, and contains the absolute file offset to the fragment | |
250 | of the ".line" section containing the line numbers for the | |
251 | current compilation unit. | |
252 | */ | |
253 | ||
254 | struct dwfinfo { | |
255 | int dbfoff; /* Absolute file offset to start of .debug section */ | |
256 | int dbroff; /* Relative offset from start of .debug section */ | |
257 | int dblength; /* Size of the chunk of DIE's being examined */ | |
258 | int lnfoff; /* Absolute file offset to line table fragment */ | |
259 | }; | |
260 | ||
261 | #define DBFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbfoff) | |
262 | #define DBROFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->dbroff) | |
263 | #define DBLENGTH(p) (((struct dwfinfo *)((p)->read_symtab_private))->dblength) | |
264 | #define LNFOFF(p) (((struct dwfinfo *)((p)->read_symtab_private))->lnfoff) | |
265 | ||
4d315a07 FF |
266 | /* The generic symbol table building routines have separate lists for |
267 | file scope symbols and all all other scopes (local scopes). So | |
268 | we need to select the right one to pass to add_symbol_to_list(). | |
269 | We do it by keeping a pointer to the correct list in list_in_scope. | |
35f5886e | 270 | |
4d315a07 FF |
271 | FIXME: The original dwarf code just treated the file scope as the first |
272 | local scope, and all other local scopes as nested local scopes, and worked | |
273 | fine. Check to see if we really need to distinguish these in buildsym.c */ | |
35f5886e | 274 | |
99140c31 | 275 | struct pending **list_in_scope = &file_symbols; |
35f5886e FF |
276 | |
277 | /* DIES which have user defined types or modified user defined types refer to | |
278 | other DIES for the type information. Thus we need to associate the offset | |
279 | of a DIE for a user defined type with a pointer to the type information. | |
280 | ||
281 | Originally this was done using a simple but expensive algorithm, with an | |
282 | array of unsorted structures, each containing an offset/type-pointer pair. | |
283 | This array was scanned linearly each time a lookup was done. The result | |
284 | was that gdb was spending over half it's startup time munging through this | |
285 | array of pointers looking for a structure that had the right offset member. | |
286 | ||
287 | The second attempt used the same array of structures, but the array was | |
288 | sorted using qsort each time a new offset/type was recorded, and a binary | |
289 | search was used to find the type pointer for a given DIE offset. This was | |
290 | even slower, due to the overhead of sorting the array each time a new | |
291 | offset/type pair was entered. | |
292 | ||
293 | The third attempt uses a fixed size array of type pointers, indexed by a | |
294 | value derived from the DIE offset. Since the minimum DIE size is 4 bytes, | |
295 | we can divide any DIE offset by 4 to obtain a unique index into this fixed | |
296 | size array. Since each element is a 4 byte pointer, it takes exactly as | |
297 | much memory to hold this array as to hold the DWARF info for a given | |
298 | compilation unit. But it gets freed as soon as we are done with it. */ | |
299 | ||
300 | static struct type **utypes; /* Pointer to array of user type pointers */ | |
301 | static int numutypes; /* Max number of user type pointers */ | |
302 | ||
303 | /* Forward declarations of static functions so we don't have to worry | |
1ab3bf1b JG |
304 | about ordering within this file. */ |
305 | ||
13b5a7ff FF |
306 | static int |
307 | attribute_size PARAMS ((unsigned int)); | |
308 | ||
309 | static unsigned long | |
310 | target_to_host PARAMS ((char *, int, int, struct objfile *)); | |
95967e73 | 311 | |
1ab3bf1b JG |
312 | static void |
313 | add_enum_psymbol PARAMS ((struct dieinfo *, struct objfile *)); | |
314 | ||
2dbde378 FF |
315 | static void |
316 | handle_producer PARAMS ((char *)); | |
317 | ||
1ab3bf1b JG |
318 | static void |
319 | read_file_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); | |
35f5886e | 320 | |
58050209 | 321 | static void |
1ab3bf1b | 322 | read_func_scope PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
323 | |
324 | static void | |
1ab3bf1b JG |
325 | read_lexical_block_scope PARAMS ((struct dieinfo *, char *, char *, |
326 | struct objfile *)); | |
35f5886e FF |
327 | |
328 | static void | |
1ab3bf1b | 329 | dwarfwarn (); |
4d315a07 | 330 | |
35f5886e | 331 | static void |
1ab3bf1b | 332 | scan_partial_symbols PARAMS ((char *, char *, struct objfile *)); |
35f5886e | 333 | |
35f5886e | 334 | static void |
1ab3bf1b JG |
335 | scan_compilation_units PARAMS ((char *, char *, char *, unsigned int, |
336 | unsigned int, struct objfile *)); | |
35f5886e FF |
337 | |
338 | static void | |
1ab3bf1b | 339 | add_partial_symbol PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e FF |
340 | |
341 | static void | |
1ab3bf1b | 342 | init_psymbol_list PARAMS ((struct objfile *, int)); |
35f5886e FF |
343 | |
344 | static void | |
95967e73 | 345 | basicdieinfo PARAMS ((struct dieinfo *, char *, struct objfile *)); |
35f5886e FF |
346 | |
347 | static void | |
95967e73 | 348 | completedieinfo PARAMS ((struct dieinfo *, struct objfile *)); |
1ab3bf1b JG |
349 | |
350 | static void | |
351 | dwarf_psymtab_to_symtab PARAMS ((struct partial_symtab *)); | |
352 | ||
353 | static void | |
354 | psymtab_to_symtab_1 PARAMS ((struct partial_symtab *)); | |
35f5886e FF |
355 | |
356 | static struct symtab * | |
1ab3bf1b | 357 | read_ofile_symtab PARAMS ((struct partial_symtab *)); |
35f5886e FF |
358 | |
359 | static void | |
1ab3bf1b | 360 | process_dies PARAMS ((char *, char *, struct objfile *)); |
35f5886e FF |
361 | |
362 | static void | |
1ab3bf1b JG |
363 | read_structure_scope PARAMS ((struct dieinfo *, char *, char *, |
364 | struct objfile *)); | |
35f5886e FF |
365 | |
366 | static struct type * | |
84ffdec2 | 367 | decode_array_element_type PARAMS ((char *)); |
35f5886e FF |
368 | |
369 | static struct type * | |
1ab3bf1b | 370 | decode_subscr_data PARAMS ((char *, char *)); |
35f5886e FF |
371 | |
372 | static void | |
1ab3bf1b | 373 | dwarf_read_array_type PARAMS ((struct dieinfo *)); |
35f5886e | 374 | |
9e4c1921 | 375 | static void |
1ab3bf1b | 376 | read_tag_pointer_type PARAMS ((struct dieinfo *dip)); |
9e4c1921 | 377 | |
35f5886e | 378 | static void |
1ab3bf1b | 379 | read_subroutine_type PARAMS ((struct dieinfo *, char *, char *)); |
35f5886e FF |
380 | |
381 | static void | |
1ab3bf1b | 382 | read_enumeration PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
383 | |
384 | static struct type * | |
1ab3bf1b | 385 | struct_type PARAMS ((struct dieinfo *, char *, char *, struct objfile *)); |
35f5886e FF |
386 | |
387 | static struct type * | |
1ab3bf1b | 388 | enum_type PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e | 389 | |
35f5886e | 390 | static void |
1ab3bf1b | 391 | decode_line_numbers PARAMS ((char *)); |
35f5886e FF |
392 | |
393 | static struct type * | |
1ab3bf1b | 394 | decode_die_type PARAMS ((struct dieinfo *)); |
35f5886e FF |
395 | |
396 | static struct type * | |
1ab3bf1b | 397 | decode_mod_fund_type PARAMS ((char *)); |
35f5886e FF |
398 | |
399 | static struct type * | |
1ab3bf1b | 400 | decode_mod_u_d_type PARAMS ((char *)); |
35f5886e FF |
401 | |
402 | static struct type * | |
1c92ca6f | 403 | decode_modified_type PARAMS ((char *, unsigned int, int)); |
35f5886e FF |
404 | |
405 | static struct type * | |
1ab3bf1b | 406 | decode_fund_type PARAMS ((unsigned int)); |
35f5886e FF |
407 | |
408 | static char * | |
1ab3bf1b | 409 | create_name PARAMS ((char *, struct obstack *)); |
35f5886e | 410 | |
35f5886e | 411 | static struct type * |
13b5a7ff | 412 | lookup_utype PARAMS ((DIE_REF)); |
35f5886e FF |
413 | |
414 | static struct type * | |
13b5a7ff | 415 | alloc_utype PARAMS ((DIE_REF, struct type *)); |
35f5886e FF |
416 | |
417 | static struct symbol * | |
1ab3bf1b | 418 | new_symbol PARAMS ((struct dieinfo *, struct objfile *)); |
35f5886e FF |
419 | |
420 | static int | |
1ab3bf1b | 421 | locval PARAMS ((char *)); |
35f5886e FF |
422 | |
423 | static void | |
1ab3bf1b JG |
424 | record_minimal_symbol PARAMS ((char *, CORE_ADDR, enum minimal_symbol_type, |
425 | struct objfile *)); | |
35f5886e FF |
426 | |
427 | /* | |
428 | ||
429 | GLOBAL FUNCTION | |
430 | ||
431 | dwarf_build_psymtabs -- build partial symtabs from DWARF debug info | |
432 | ||
433 | SYNOPSIS | |
434 | ||
2670f34d JG |
435 | void dwarf_build_psymtabs (int desc, char *filename, |
436 | struct section_offsets *section_offsets, | |
35f5886e | 437 | int mainline, unsigned int dbfoff, unsigned int dbsize, |
a048c8f5 JG |
438 | unsigned int lnoffset, unsigned int lnsize, |
439 | struct objfile *objfile) | |
35f5886e FF |
440 | |
441 | DESCRIPTION | |
442 | ||
443 | This function is called upon to build partial symtabs from files | |
444 | containing DIE's (Dwarf Information Entries) and DWARF line numbers. | |
445 | ||
446 | It is passed a file descriptor for an open file containing the DIES | |
447 | and line number information, the corresponding filename for that | |
448 | file, a base address for relocating the symbols, a flag indicating | |
449 | whether or not this debugging information is from a "main symbol | |
450 | table" rather than a shared library or dynamically linked file, | |
451 | and file offset/size pairs for the DIE information and line number | |
452 | information. | |
453 | ||
454 | RETURNS | |
455 | ||
456 | No return value. | |
457 | ||
458 | */ | |
459 | ||
460 | void | |
2670f34d | 461 | dwarf_build_psymtabs (desc, filename, section_offsets, mainline, dbfoff, dbsize, |
1ab3bf1b JG |
462 | lnoffset, lnsize, objfile) |
463 | int desc; | |
464 | char *filename; | |
2670f34d | 465 | struct section_offsets *section_offsets; |
1ab3bf1b JG |
466 | int mainline; |
467 | unsigned int dbfoff; | |
468 | unsigned int dbsize; | |
469 | unsigned int lnoffset; | |
470 | unsigned int lnsize; | |
471 | struct objfile *objfile; | |
35f5886e FF |
472 | { |
473 | struct cleanup *back_to; | |
474 | ||
95967e73 | 475 | current_objfile = objfile; |
35f5886e FF |
476 | dbbase = xmalloc (dbsize); |
477 | dbroff = 0; | |
478 | if ((lseek (desc, dbfoff, 0) != dbfoff) || | |
479 | (read (desc, dbbase, dbsize) != dbsize)) | |
480 | { | |
481 | free (dbbase); | |
482 | error ("can't read DWARF data from '%s'", filename); | |
483 | } | |
484 | back_to = make_cleanup (free, dbbase); | |
485 | ||
486 | /* If we are reinitializing, or if we have never loaded syms yet, init. | |
487 | Since we have no idea how many DIES we are looking at, we just guess | |
488 | some arbitrary value. */ | |
489 | ||
13b5a7ff FF |
490 | if (mainline || objfile -> global_psymbols.size == 0 || |
491 | objfile -> static_psymbols.size == 0) | |
35f5886e | 492 | { |
1ab3bf1b | 493 | init_psymbol_list (objfile, 1024); |
35f5886e FF |
494 | } |
495 | ||
84ffdec2 | 496 | /* Save the relocation factor where everybody can see it. */ |
f8b76e70 | 497 | |
2670f34d JG |
498 | base_section_offsets = section_offsets; |
499 | baseaddr = ANOFFSET (section_offsets, 0); | |
f8b76e70 | 500 | |
35f5886e FF |
501 | /* Follow the compilation unit sibling chain, building a partial symbol |
502 | table entry for each one. Save enough information about each compilation | |
503 | unit to locate the full DWARF information later. */ | |
504 | ||
4d315a07 | 505 | scan_compilation_units (filename, dbbase, dbbase + dbsize, |
a048c8f5 | 506 | dbfoff, lnoffset, objfile); |
35f5886e | 507 | |
35f5886e | 508 | do_cleanups (back_to); |
95967e73 | 509 | current_objfile = NULL; |
35f5886e FF |
510 | } |
511 | ||
512 | ||
513 | /* | |
514 | ||
515 | LOCAL FUNCTION | |
516 | ||
1ab3bf1b | 517 | record_minimal_symbol -- add entry to gdb's minimal symbol table |
35f5886e FF |
518 | |
519 | SYNOPSIS | |
520 | ||
1ab3bf1b JG |
521 | static void record_minimal_symbol (char *name, CORE_ADDR address, |
522 | enum minimal_symbol_type ms_type, | |
523 | struct objfile *objfile) | |
35f5886e FF |
524 | |
525 | DESCRIPTION | |
526 | ||
527 | Given a pointer to the name of a symbol that should be added to the | |
1ab3bf1b | 528 | minimal symbol table, and the address associated with that |
35f5886e | 529 | symbol, records this information for later use in building the |
1ab3bf1b | 530 | minimal symbol table. |
35f5886e | 531 | |
35f5886e FF |
532 | */ |
533 | ||
534 | static void | |
1ab3bf1b JG |
535 | record_minimal_symbol (name, address, ms_type, objfile) |
536 | char *name; | |
537 | CORE_ADDR address; | |
538 | enum minimal_symbol_type ms_type; | |
539 | struct objfile *objfile; | |
35f5886e | 540 | { |
1ab3bf1b JG |
541 | name = obsavestring (name, strlen (name), &objfile -> symbol_obstack); |
542 | prim_record_minimal_symbol (name, address, ms_type); | |
35f5886e FF |
543 | } |
544 | ||
545 | /* | |
546 | ||
547 | LOCAL FUNCTION | |
548 | ||
549 | dwarfwarn -- issue a DWARF related warning | |
550 | ||
551 | DESCRIPTION | |
552 | ||
553 | Issue warnings about DWARF related things that aren't serious enough | |
554 | to warrant aborting with an error, but should not be ignored either. | |
555 | This includes things like detectable corruption in DIE's, missing | |
556 | DIE's, unimplemented features, etc. | |
557 | ||
558 | In general, running across tags or attributes that we don't recognize | |
559 | is not considered to be a problem and we should not issue warnings | |
560 | about such. | |
561 | ||
562 | NOTES | |
563 | ||
564 | We mostly follow the example of the error() routine, but without | |
565 | returning to command level. It is arguable about whether warnings | |
566 | should be issued at all, and if so, where they should go (stdout or | |
567 | stderr). | |
568 | ||
569 | We assume that curdie is valid and contains at least the basic | |
570 | information for the DIE where the problem was noticed. | |
571 | */ | |
572 | ||
573 | static void | |
313fdead JG |
574 | dwarfwarn (va_alist) |
575 | va_dcl | |
35f5886e FF |
576 | { |
577 | va_list ap; | |
313fdead | 578 | char *fmt; |
35f5886e | 579 | |
313fdead JG |
580 | va_start (ap); |
581 | fmt = va_arg (ap, char *); | |
35f5886e | 582 | warning_setup (); |
13b5a7ff | 583 | fprintf (stderr, "warning: DWARF ref 0x%x: ", curdie -> die_ref); |
35f5886e FF |
584 | if (curdie -> at_name) |
585 | { | |
586 | fprintf (stderr, "'%s': ", curdie -> at_name); | |
587 | } | |
588 | vfprintf (stderr, fmt, ap); | |
589 | fprintf (stderr, "\n"); | |
590 | fflush (stderr); | |
591 | va_end (ap); | |
592 | } | |
4d315a07 | 593 | |
35f5886e FF |
594 | /* |
595 | ||
596 | LOCAL FUNCTION | |
597 | ||
598 | read_lexical_block_scope -- process all dies in a lexical block | |
599 | ||
600 | SYNOPSIS | |
601 | ||
602 | static void read_lexical_block_scope (struct dieinfo *dip, | |
603 | char *thisdie, char *enddie) | |
604 | ||
605 | DESCRIPTION | |
606 | ||
607 | Process all the DIES contained within a lexical block scope. | |
608 | Start a new scope, process the dies, and then close the scope. | |
609 | ||
610 | */ | |
611 | ||
612 | static void | |
1ab3bf1b JG |
613 | read_lexical_block_scope (dip, thisdie, enddie, objfile) |
614 | struct dieinfo *dip; | |
615 | char *thisdie; | |
616 | char *enddie; | |
617 | struct objfile *objfile; | |
35f5886e | 618 | { |
4d315a07 FF |
619 | register struct context_stack *new; |
620 | ||
4ed3a9ea | 621 | push_context (0, dip -> at_low_pc); |
13b5a7ff | 622 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 FF |
623 | new = pop_context (); |
624 | if (local_symbols != NULL) | |
625 | { | |
626 | finish_block (0, &local_symbols, new -> old_blocks, new -> start_addr, | |
1ab3bf1b | 627 | dip -> at_high_pc, objfile); |
4d315a07 FF |
628 | } |
629 | local_symbols = new -> locals; | |
35f5886e FF |
630 | } |
631 | ||
632 | /* | |
633 | ||
634 | LOCAL FUNCTION | |
635 | ||
636 | lookup_utype -- look up a user defined type from die reference | |
637 | ||
638 | SYNOPSIS | |
639 | ||
13b5a7ff | 640 | static type *lookup_utype (DIE_REF die_ref) |
35f5886e FF |
641 | |
642 | DESCRIPTION | |
643 | ||
644 | Given a DIE reference, lookup the user defined type associated with | |
645 | that DIE, if it has been registered already. If not registered, then | |
646 | return NULL. Alloc_utype() can be called to register an empty | |
647 | type for this reference, which will be filled in later when the | |
648 | actual referenced DIE is processed. | |
649 | */ | |
650 | ||
651 | static struct type * | |
13b5a7ff FF |
652 | lookup_utype (die_ref) |
653 | DIE_REF die_ref; | |
35f5886e FF |
654 | { |
655 | struct type *type = NULL; | |
656 | int utypeidx; | |
657 | ||
13b5a7ff | 658 | utypeidx = (die_ref - dbroff) / 4; |
35f5886e FF |
659 | if ((utypeidx < 0) || (utypeidx >= numutypes)) |
660 | { | |
13b5a7ff | 661 | dwarfwarn ("reference to DIE (0x%x) outside compilation unit", die_ref); |
35f5886e FF |
662 | } |
663 | else | |
664 | { | |
665 | type = *(utypes + utypeidx); | |
666 | } | |
667 | return (type); | |
668 | } | |
669 | ||
670 | ||
671 | /* | |
672 | ||
673 | LOCAL FUNCTION | |
674 | ||
675 | alloc_utype -- add a user defined type for die reference | |
676 | ||
677 | SYNOPSIS | |
678 | ||
13b5a7ff | 679 | static type *alloc_utype (DIE_REF die_ref, struct type *utypep) |
35f5886e FF |
680 | |
681 | DESCRIPTION | |
682 | ||
13b5a7ff | 683 | Given a die reference DIE_REF, and a possible pointer to a user |
35f5886e FF |
684 | defined type UTYPEP, register that this reference has a user |
685 | defined type and either use the specified type in UTYPEP or | |
686 | make a new empty type that will be filled in later. | |
687 | ||
688 | We should only be called after calling lookup_utype() to verify that | |
13b5a7ff | 689 | there is not currently a type registered for DIE_REF. |
35f5886e FF |
690 | */ |
691 | ||
692 | static struct type * | |
13b5a7ff FF |
693 | alloc_utype (die_ref, utypep) |
694 | DIE_REF die_ref; | |
1ab3bf1b | 695 | struct type *utypep; |
35f5886e FF |
696 | { |
697 | struct type **typep; | |
698 | int utypeidx; | |
699 | ||
13b5a7ff | 700 | utypeidx = (die_ref - dbroff) / 4; |
35f5886e FF |
701 | typep = utypes + utypeidx; |
702 | if ((utypeidx < 0) || (utypeidx >= numutypes)) | |
703 | { | |
1ab3bf1b | 704 | utypep = lookup_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff | 705 | dwarfwarn ("reference to DIE (0x%x) outside compilation unit", die_ref); |
35f5886e FF |
706 | } |
707 | else if (*typep != NULL) | |
708 | { | |
709 | utypep = *typep; | |
710 | SQUAWK (("internal error: dup user type allocation")); | |
711 | } | |
712 | else | |
713 | { | |
714 | if (utypep == NULL) | |
715 | { | |
8050a57b | 716 | utypep = alloc_type (current_objfile); |
35f5886e FF |
717 | } |
718 | *typep = utypep; | |
719 | } | |
720 | return (utypep); | |
721 | } | |
722 | ||
723 | /* | |
724 | ||
725 | LOCAL FUNCTION | |
726 | ||
727 | decode_die_type -- return a type for a specified die | |
728 | ||
729 | SYNOPSIS | |
730 | ||
731 | static struct type *decode_die_type (struct dieinfo *dip) | |
732 | ||
733 | DESCRIPTION | |
734 | ||
735 | Given a pointer to a die information structure DIP, decode the | |
736 | type of the die and return a pointer to the decoded type. All | |
737 | dies without specific types default to type int. | |
738 | */ | |
739 | ||
740 | static struct type * | |
1ab3bf1b JG |
741 | decode_die_type (dip) |
742 | struct dieinfo *dip; | |
35f5886e FF |
743 | { |
744 | struct type *type = NULL; | |
745 | ||
746 | if (dip -> at_fund_type != 0) | |
747 | { | |
748 | type = decode_fund_type (dip -> at_fund_type); | |
749 | } | |
750 | else if (dip -> at_mod_fund_type != NULL) | |
751 | { | |
752 | type = decode_mod_fund_type (dip -> at_mod_fund_type); | |
753 | } | |
754 | else if (dip -> at_user_def_type) | |
755 | { | |
756 | if ((type = lookup_utype (dip -> at_user_def_type)) == NULL) | |
757 | { | |
758 | type = alloc_utype (dip -> at_user_def_type, NULL); | |
759 | } | |
760 | } | |
761 | else if (dip -> at_mod_u_d_type) | |
762 | { | |
763 | type = decode_mod_u_d_type (dip -> at_mod_u_d_type); | |
764 | } | |
765 | else | |
766 | { | |
1ab3bf1b | 767 | type = lookup_fundamental_type (current_objfile, FT_INTEGER); |
35f5886e FF |
768 | } |
769 | return (type); | |
770 | } | |
771 | ||
772 | /* | |
773 | ||
774 | LOCAL FUNCTION | |
775 | ||
776 | struct_type -- compute and return the type for a struct or union | |
777 | ||
778 | SYNOPSIS | |
779 | ||
780 | static struct type *struct_type (struct dieinfo *dip, char *thisdie, | |
8b5b6fae | 781 | char *enddie, struct objfile *objfile) |
35f5886e FF |
782 | |
783 | DESCRIPTION | |
784 | ||
785 | Given pointer to a die information structure for a die which | |
715cafcb FF |
786 | defines a union or structure (and MUST define one or the other), |
787 | and pointers to the raw die data that define the range of dies which | |
788 | define the members, compute and return the user defined type for the | |
789 | structure or union. | |
35f5886e FF |
790 | */ |
791 | ||
792 | static struct type * | |
1ab3bf1b JG |
793 | struct_type (dip, thisdie, enddie, objfile) |
794 | struct dieinfo *dip; | |
795 | char *thisdie; | |
796 | char *enddie; | |
797 | struct objfile *objfile; | |
35f5886e FF |
798 | { |
799 | struct type *type; | |
800 | struct nextfield { | |
801 | struct nextfield *next; | |
802 | struct field field; | |
803 | }; | |
804 | struct nextfield *list = NULL; | |
805 | struct nextfield *new; | |
806 | int nfields = 0; | |
807 | int n; | |
808 | char *tpart1; | |
35f5886e | 809 | struct dieinfo mbr; |
8b5b6fae | 810 | char *nextdie; |
50055e94 | 811 | int anonymous_size; |
35f5886e | 812 | |
13b5a7ff | 813 | if ((type = lookup_utype (dip -> die_ref)) == NULL) |
35f5886e | 814 | { |
5edf98d7 | 815 | /* No forward references created an empty type, so install one now */ |
13b5a7ff | 816 | type = alloc_utype (dip -> die_ref, NULL); |
35f5886e | 817 | } |
a3723a43 | 818 | INIT_CPLUS_SPECIFIC(type); |
13b5a7ff | 819 | switch (dip -> die_tag) |
35f5886e | 820 | { |
715cafcb | 821 | case TAG_structure_type: |
5edf98d7 | 822 | TYPE_CODE (type) = TYPE_CODE_STRUCT; |
715cafcb FF |
823 | tpart1 = "struct"; |
824 | break; | |
825 | case TAG_union_type: | |
826 | TYPE_CODE (type) = TYPE_CODE_UNION; | |
827 | tpart1 = "union"; | |
828 | break; | |
829 | default: | |
830 | /* Should never happen */ | |
831 | TYPE_CODE (type) = TYPE_CODE_UNDEF; | |
832 | tpart1 = "???"; | |
833 | SQUAWK (("missing structure or union tag")); | |
834 | break; | |
35f5886e | 835 | } |
5edf98d7 FF |
836 | /* Some compilers try to be helpful by inventing "fake" names for |
837 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
838 | Thanks, but no thanks... */ | |
715cafcb FF |
839 | if (dip -> at_name != NULL |
840 | && *dip -> at_name != '~' | |
841 | && *dip -> at_name != '.') | |
35f5886e | 842 | { |
95967e73 | 843 | TYPE_NAME (type) = obconcat (&objfile -> type_obstack, |
1ab3bf1b | 844 | tpart1, " ", dip -> at_name); |
35f5886e | 845 | } |
50055e94 FF |
846 | /* Use whatever size is known. Zero is a valid size. We might however |
847 | wish to check has_at_byte_size to make sure that some byte size was | |
848 | given explicitly, but DWARF doesn't specify that explicit sizes of | |
849 | zero have to present, so complaining about missing sizes should | |
850 | probably not be the default. */ | |
851 | TYPE_LENGTH (type) = dip -> at_byte_size; | |
13b5a7ff | 852 | thisdie += dip -> die_length; |
35f5886e FF |
853 | while (thisdie < enddie) |
854 | { | |
95967e73 FF |
855 | basicdieinfo (&mbr, thisdie, objfile); |
856 | completedieinfo (&mbr, objfile); | |
13b5a7ff | 857 | if (mbr.die_length <= SIZEOF_DIE_LENGTH) |
35f5886e FF |
858 | { |
859 | break; | |
860 | } | |
8b5b6fae FF |
861 | else if (mbr.at_sibling != 0) |
862 | { | |
863 | nextdie = dbbase + mbr.at_sibling - dbroff; | |
864 | } | |
865 | else | |
866 | { | |
13b5a7ff | 867 | nextdie = thisdie + mbr.die_length; |
8b5b6fae | 868 | } |
13b5a7ff | 869 | switch (mbr.die_tag) |
35f5886e FF |
870 | { |
871 | case TAG_member: | |
872 | /* Get space to record the next field's data. */ | |
873 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
874 | new -> next = list; | |
875 | list = new; | |
876 | /* Save the data. */ | |
50e0dc41 FF |
877 | list -> field.name = |
878 | obsavestring (mbr.at_name, strlen (mbr.at_name), | |
879 | &objfile -> type_obstack); | |
35f5886e FF |
880 | list -> field.type = decode_die_type (&mbr); |
881 | list -> field.bitpos = 8 * locval (mbr.at_location); | |
4db8e515 FF |
882 | /* Handle bit fields. */ |
883 | list -> field.bitsize = mbr.at_bit_size; | |
884 | #if BITS_BIG_ENDIAN | |
885 | /* For big endian bits, the at_bit_offset gives the additional | |
886 | bit offset from the MSB of the containing anonymous object to | |
887 | the MSB of the field. We don't have to do anything special | |
888 | since we don't need to know the size of the anonymous object. */ | |
889 | list -> field.bitpos += mbr.at_bit_offset; | |
890 | #else | |
891 | /* For little endian bits, we need to have a non-zero at_bit_size, | |
892 | so that we know we are in fact dealing with a bitfield. Compute | |
893 | the bit offset to the MSB of the anonymous object, subtract off | |
894 | the number of bits from the MSB of the field to the MSB of the | |
895 | object, and then subtract off the number of bits of the field | |
896 | itself. The result is the bit offset of the LSB of the field. */ | |
897 | if (mbr.at_bit_size > 0) | |
898 | { | |
50055e94 FF |
899 | if (mbr.has_at_byte_size) |
900 | { | |
901 | /* The size of the anonymous object containing the bit field | |
902 | is explicit, so use the indicated size (in bytes). */ | |
903 | anonymous_size = mbr.at_byte_size; | |
904 | } | |
905 | else | |
906 | { | |
907 | /* The size of the anonymous object containing the bit field | |
908 | matches the size of an object of the bit field's type. | |
909 | DWARF allows at_byte_size to be left out in such cases, | |
910 | as a debug information size optimization. */ | |
911 | anonymous_size = TYPE_LENGTH (list -> field.type); | |
912 | } | |
4db8e515 | 913 | list -> field.bitpos += |
50055e94 | 914 | anonymous_size * 8 - mbr.at_bit_offset - mbr.at_bit_size; |
4db8e515 FF |
915 | } |
916 | #endif | |
35f5886e FF |
917 | nfields++; |
918 | break; | |
919 | default: | |
8b5b6fae | 920 | process_dies (thisdie, nextdie, objfile); |
35f5886e FF |
921 | break; |
922 | } | |
8b5b6fae | 923 | thisdie = nextdie; |
35f5886e | 924 | } |
5edf98d7 FF |
925 | /* Now create the vector of fields, and record how big it is. We may |
926 | not even have any fields, if this DIE was generated due to a reference | |
927 | to an anonymous structure or union. In this case, TYPE_FLAG_STUB is | |
928 | set, which clues gdb in to the fact that it needs to search elsewhere | |
929 | for the full structure definition. */ | |
930 | if (nfields == 0) | |
35f5886e | 931 | { |
5edf98d7 FF |
932 | TYPE_FLAGS (type) |= TYPE_FLAG_STUB; |
933 | } | |
934 | else | |
935 | { | |
936 | TYPE_NFIELDS (type) = nfields; | |
937 | TYPE_FIELDS (type) = (struct field *) | |
95967e73 | 938 | obstack_alloc (&objfile -> type_obstack, |
1ab3bf1b | 939 | sizeof (struct field) * nfields); |
5edf98d7 FF |
940 | /* Copy the saved-up fields into the field vector. */ |
941 | for (n = nfields; list; list = list -> next) | |
942 | { | |
943 | TYPE_FIELD (type, --n) = list -> field; | |
944 | } | |
945 | } | |
35f5886e FF |
946 | return (type); |
947 | } | |
948 | ||
949 | /* | |
950 | ||
951 | LOCAL FUNCTION | |
952 | ||
953 | read_structure_scope -- process all dies within struct or union | |
954 | ||
955 | SYNOPSIS | |
956 | ||
957 | static void read_structure_scope (struct dieinfo *dip, | |
8b5b6fae | 958 | char *thisdie, char *enddie, struct objfile *objfile) |
35f5886e FF |
959 | |
960 | DESCRIPTION | |
961 | ||
962 | Called when we find the DIE that starts a structure or union | |
963 | scope (definition) to process all dies that define the members | |
964 | of the structure or union. DIP is a pointer to the die info | |
965 | struct for the DIE that names the structure or union. | |
966 | ||
967 | NOTES | |
968 | ||
969 | Note that we need to call struct_type regardless of whether or not | |
84ce6717 FF |
970 | the DIE has an at_name attribute, since it might be an anonymous |
971 | structure or union. This gets the type entered into our set of | |
972 | user defined types. | |
973 | ||
974 | However, if the structure is incomplete (an opaque struct/union) | |
975 | then suppress creating a symbol table entry for it since gdb only | |
976 | wants to find the one with the complete definition. Note that if | |
977 | it is complete, we just call new_symbol, which does it's own | |
978 | checking about whether the struct/union is anonymous or not (and | |
979 | suppresses creating a symbol table entry itself). | |
980 | ||
35f5886e FF |
981 | */ |
982 | ||
983 | static void | |
1ab3bf1b JG |
984 | read_structure_scope (dip, thisdie, enddie, objfile) |
985 | struct dieinfo *dip; | |
986 | char *thisdie; | |
987 | char *enddie; | |
988 | struct objfile *objfile; | |
35f5886e FF |
989 | { |
990 | struct type *type; | |
991 | struct symbol *sym; | |
992 | ||
8b5b6fae | 993 | type = struct_type (dip, thisdie, enddie, objfile); |
84ce6717 | 994 | if (!(TYPE_FLAGS (type) & TYPE_FLAG_STUB)) |
35f5886e | 995 | { |
1ab3bf1b | 996 | if ((sym = new_symbol (dip, objfile)) != NULL) |
84ce6717 FF |
997 | { |
998 | SYMBOL_TYPE (sym) = type; | |
999 | } | |
35f5886e FF |
1000 | } |
1001 | } | |
1002 | ||
1003 | /* | |
1004 | ||
1005 | LOCAL FUNCTION | |
1006 | ||
1007 | decode_array_element_type -- decode type of the array elements | |
1008 | ||
1009 | SYNOPSIS | |
1010 | ||
1011 | static struct type *decode_array_element_type (char *scan, char *end) | |
1012 | ||
1013 | DESCRIPTION | |
1014 | ||
1015 | As the last step in decoding the array subscript information for an | |
1016 | array DIE, we need to decode the type of the array elements. We are | |
1017 | passed a pointer to this last part of the subscript information and | |
1018 | must return the appropriate type. If the type attribute is not | |
1019 | recognized, just warn about the problem and return type int. | |
1020 | */ | |
1021 | ||
1022 | static struct type * | |
84ffdec2 | 1023 | decode_array_element_type (scan) |
1ab3bf1b | 1024 | char *scan; |
35f5886e FF |
1025 | { |
1026 | struct type *typep; | |
13b5a7ff FF |
1027 | DIE_REF die_ref; |
1028 | unsigned short attribute; | |
35f5886e | 1029 | unsigned short fundtype; |
13b5a7ff | 1030 | int nbytes; |
35f5886e | 1031 | |
13b5a7ff FF |
1032 | attribute = target_to_host (scan, SIZEOF_ATTRIBUTE, GET_UNSIGNED, |
1033 | current_objfile); | |
1034 | scan += SIZEOF_ATTRIBUTE; | |
1035 | if ((nbytes = attribute_size (attribute)) == -1) | |
1036 | { | |
35f5886e | 1037 | SQUAWK (("bad array element type attribute 0x%x", attribute)); |
1ab3bf1b | 1038 | typep = lookup_fundamental_type (current_objfile, FT_INTEGER); |
13b5a7ff FF |
1039 | } |
1040 | else | |
1041 | { | |
1042 | switch (attribute) | |
1043 | { | |
1044 | case AT_fund_type: | |
1045 | fundtype = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1046 | current_objfile); | |
1047 | typep = decode_fund_type (fundtype); | |
1048 | break; | |
1049 | case AT_mod_fund_type: | |
1050 | typep = decode_mod_fund_type (scan); | |
1051 | break; | |
1052 | case AT_user_def_type: | |
1053 | die_ref = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1054 | current_objfile); | |
1055 | if ((typep = lookup_utype (die_ref)) == NULL) | |
1056 | { | |
1057 | typep = alloc_utype (die_ref, NULL); | |
1058 | } | |
1059 | break; | |
1060 | case AT_mod_u_d_type: | |
1061 | typep = decode_mod_u_d_type (scan); | |
1062 | break; | |
1063 | default: | |
1064 | SQUAWK (("bad array element type attribute 0x%x", attribute)); | |
1065 | typep = lookup_fundamental_type (current_objfile, FT_INTEGER); | |
1066 | break; | |
1067 | } | |
35f5886e FF |
1068 | } |
1069 | return (typep); | |
1070 | } | |
1071 | ||
1072 | /* | |
1073 | ||
1074 | LOCAL FUNCTION | |
1075 | ||
1076 | decode_subscr_data -- decode array subscript and element type data | |
1077 | ||
1078 | SYNOPSIS | |
1079 | ||
1080 | static struct type *decode_subscr_data (char *scan, char *end) | |
1081 | ||
1082 | DESCRIPTION | |
1083 | ||
1084 | The array subscripts and the data type of the elements of an | |
1085 | array are described by a list of data items, stored as a block | |
1086 | of contiguous bytes. There is a data item describing each array | |
1087 | dimension, and a final data item describing the element type. | |
1088 | The data items are ordered the same as their appearance in the | |
1089 | source (I.E. leftmost dimension first, next to leftmost second, | |
1090 | etc). | |
1091 | ||
1092 | We are passed a pointer to the start of the block of bytes | |
1093 | containing the data items, and a pointer to the first byte past | |
1094 | the data. This function decodes the data and returns a type. | |
1095 | ||
1096 | BUGS | |
1097 | FIXME: This code only implements the forms currently used | |
1098 | by the AT&T and GNU C compilers. | |
1099 | ||
1100 | The end pointer is supplied for error checking, maybe we should | |
1101 | use it for that... | |
1102 | */ | |
1103 | ||
1104 | static struct type * | |
1ab3bf1b JG |
1105 | decode_subscr_data (scan, end) |
1106 | char *scan; | |
1107 | char *end; | |
35f5886e FF |
1108 | { |
1109 | struct type *typep = NULL; | |
1110 | struct type *nexttype; | |
13b5a7ff FF |
1111 | unsigned int format; |
1112 | unsigned short fundtype; | |
1113 | unsigned long lowbound; | |
1114 | unsigned long highbound; | |
1115 | int nbytes; | |
35f5886e | 1116 | |
13b5a7ff FF |
1117 | format = target_to_host (scan, SIZEOF_FORMAT_SPECIFIER, GET_UNSIGNED, |
1118 | current_objfile); | |
1119 | scan += SIZEOF_FORMAT_SPECIFIER; | |
35f5886e FF |
1120 | switch (format) |
1121 | { | |
1122 | case FMT_ET: | |
84ffdec2 | 1123 | typep = decode_array_element_type (scan); |
35f5886e FF |
1124 | break; |
1125 | case FMT_FT_C_C: | |
13b5a7ff FF |
1126 | fundtype = target_to_host (scan, SIZEOF_FMT_FT, GET_UNSIGNED, |
1127 | current_objfile); | |
1128 | scan += SIZEOF_FMT_FT; | |
35f5886e FF |
1129 | if (fundtype != FT_integer && fundtype != FT_signed_integer |
1130 | && fundtype != FT_unsigned_integer) | |
1131 | { | |
1132 | SQUAWK (("array subscripts must be integral types, not type 0x%x", | |
13b5a7ff | 1133 | fundtype)); |
35f5886e FF |
1134 | } |
1135 | else | |
1136 | { | |
13b5a7ff FF |
1137 | nbytes = TARGET_FT_LONG_SIZE (current_objfile); |
1138 | lowbound = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1139 | current_objfile); | |
1140 | scan += nbytes; | |
1141 | highbound = target_to_host (scan, nbytes, GET_UNSIGNED, | |
1142 | current_objfile); | |
1143 | scan += nbytes; | |
35f5886e FF |
1144 | nexttype = decode_subscr_data (scan, end); |
1145 | if (nexttype != NULL) | |
1146 | { | |
8050a57b | 1147 | typep = alloc_type (current_objfile); |
35f5886e FF |
1148 | TYPE_CODE (typep) = TYPE_CODE_ARRAY; |
1149 | TYPE_LENGTH (typep) = TYPE_LENGTH (nexttype); | |
6c316cfd | 1150 | TYPE_LENGTH (typep) *= (highbound - lowbound) + 1; |
35f5886e FF |
1151 | TYPE_TARGET_TYPE (typep) = nexttype; |
1152 | } | |
1153 | } | |
1154 | break; | |
1155 | case FMT_FT_C_X: | |
1156 | case FMT_FT_X_C: | |
1157 | case FMT_FT_X_X: | |
1158 | case FMT_UT_C_C: | |
1159 | case FMT_UT_C_X: | |
1160 | case FMT_UT_X_C: | |
1161 | case FMT_UT_X_X: | |
1162 | SQUAWK (("array subscript format 0x%x not handled yet", format)); | |
1163 | break; | |
1164 | default: | |
1165 | SQUAWK (("unknown array subscript format %x", format)); | |
1166 | break; | |
1167 | } | |
1168 | return (typep); | |
1169 | } | |
1170 | ||
1171 | /* | |
1172 | ||
1173 | LOCAL FUNCTION | |
1174 | ||
4d315a07 | 1175 | dwarf_read_array_type -- read TAG_array_type DIE |
35f5886e FF |
1176 | |
1177 | SYNOPSIS | |
1178 | ||
4d315a07 | 1179 | static void dwarf_read_array_type (struct dieinfo *dip) |
35f5886e FF |
1180 | |
1181 | DESCRIPTION | |
1182 | ||
1183 | Extract all information from a TAG_array_type DIE and add to | |
1184 | the user defined type vector. | |
1185 | */ | |
1186 | ||
1187 | static void | |
1ab3bf1b JG |
1188 | dwarf_read_array_type (dip) |
1189 | struct dieinfo *dip; | |
35f5886e FF |
1190 | { |
1191 | struct type *type; | |
af213624 | 1192 | struct type *utype; |
35f5886e FF |
1193 | char *sub; |
1194 | char *subend; | |
13b5a7ff FF |
1195 | unsigned short blocksz; |
1196 | int nbytes; | |
35f5886e FF |
1197 | |
1198 | if (dip -> at_ordering != ORD_row_major) | |
1199 | { | |
1200 | /* FIXME: Can gdb even handle column major arrays? */ | |
1201 | SQUAWK (("array not row major; not handled correctly")); | |
1202 | } | |
1203 | if ((sub = dip -> at_subscr_data) != NULL) | |
1204 | { | |
13b5a7ff FF |
1205 | nbytes = attribute_size (AT_subscr_data); |
1206 | blocksz = target_to_host (sub, nbytes, GET_UNSIGNED, current_objfile); | |
1207 | subend = sub + nbytes + blocksz; | |
1208 | sub += nbytes; | |
35f5886e FF |
1209 | type = decode_subscr_data (sub, subend); |
1210 | if (type == NULL) | |
1211 | { | |
13b5a7ff | 1212 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) |
af213624 | 1213 | { |
13b5a7ff | 1214 | utype = alloc_utype (dip -> die_ref, NULL); |
af213624 FF |
1215 | } |
1216 | TYPE_CODE (utype) = TYPE_CODE_ARRAY; | |
1ab3bf1b JG |
1217 | TYPE_TARGET_TYPE (utype) = |
1218 | lookup_fundamental_type (current_objfile, FT_INTEGER); | |
af213624 | 1219 | TYPE_LENGTH (utype) = 1 * TYPE_LENGTH (TYPE_TARGET_TYPE (utype)); |
35f5886e FF |
1220 | } |
1221 | else | |
1222 | { | |
13b5a7ff | 1223 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) |
af213624 | 1224 | { |
4ed3a9ea | 1225 | alloc_utype (dip -> die_ref, type); |
af213624 FF |
1226 | } |
1227 | else | |
1228 | { | |
1229 | TYPE_CODE (utype) = TYPE_CODE_ARRAY; | |
1230 | TYPE_LENGTH (utype) = TYPE_LENGTH (type); | |
1231 | TYPE_TARGET_TYPE (utype) = TYPE_TARGET_TYPE (type); | |
1232 | } | |
35f5886e FF |
1233 | } |
1234 | } | |
1235 | } | |
1236 | ||
1237 | /* | |
1238 | ||
9e4c1921 FF |
1239 | LOCAL FUNCTION |
1240 | ||
1241 | read_tag_pointer_type -- read TAG_pointer_type DIE | |
1242 | ||
1243 | SYNOPSIS | |
1244 | ||
1245 | static void read_tag_pointer_type (struct dieinfo *dip) | |
1246 | ||
1247 | DESCRIPTION | |
1248 | ||
1249 | Extract all information from a TAG_pointer_type DIE and add to | |
1250 | the user defined type vector. | |
1251 | */ | |
1252 | ||
1253 | static void | |
1ab3bf1b JG |
1254 | read_tag_pointer_type (dip) |
1255 | struct dieinfo *dip; | |
9e4c1921 FF |
1256 | { |
1257 | struct type *type; | |
1258 | struct type *utype; | |
9e4c1921 FF |
1259 | |
1260 | type = decode_die_type (dip); | |
13b5a7ff | 1261 | if ((utype = lookup_utype (dip -> die_ref)) == NULL) |
9e4c1921 FF |
1262 | { |
1263 | utype = lookup_pointer_type (type); | |
4ed3a9ea | 1264 | alloc_utype (dip -> die_ref, utype); |
9e4c1921 FF |
1265 | } |
1266 | else | |
1267 | { | |
1268 | TYPE_TARGET_TYPE (utype) = type; | |
1269 | TYPE_POINTER_TYPE (type) = utype; | |
1270 | ||
1271 | /* We assume the machine has only one representation for pointers! */ | |
1272 | /* FIXME: This confuses host<->target data representations, and is a | |
1273 | poor assumption besides. */ | |
1274 | ||
1275 | TYPE_LENGTH (utype) = sizeof (char *); | |
1276 | TYPE_CODE (utype) = TYPE_CODE_PTR; | |
1277 | } | |
1278 | } | |
1279 | ||
1280 | /* | |
1281 | ||
35f5886e FF |
1282 | LOCAL FUNCTION |
1283 | ||
1284 | read_subroutine_type -- process TAG_subroutine_type dies | |
1285 | ||
1286 | SYNOPSIS | |
1287 | ||
1288 | static void read_subroutine_type (struct dieinfo *dip, char thisdie, | |
1289 | char *enddie) | |
1290 | ||
1291 | DESCRIPTION | |
1292 | ||
1293 | Handle DIES due to C code like: | |
1294 | ||
1295 | struct foo { | |
1296 | int (*funcp)(int a, long l); (Generates TAG_subroutine_type DIE) | |
1297 | int b; | |
1298 | }; | |
1299 | ||
1300 | NOTES | |
1301 | ||
1302 | The parameter DIES are currently ignored. See if gdb has a way to | |
1303 | include this info in it's type system, and decode them if so. Is | |
1304 | this what the type structure's "arg_types" field is for? (FIXME) | |
1305 | */ | |
1306 | ||
1307 | static void | |
1ab3bf1b JG |
1308 | read_subroutine_type (dip, thisdie, enddie) |
1309 | struct dieinfo *dip; | |
1310 | char *thisdie; | |
1311 | char *enddie; | |
35f5886e | 1312 | { |
af213624 FF |
1313 | struct type *type; /* Type that this function returns */ |
1314 | struct type *ftype; /* Function that returns above type */ | |
35f5886e | 1315 | |
af213624 FF |
1316 | /* Decode the type that this subroutine returns */ |
1317 | ||
35f5886e | 1318 | type = decode_die_type (dip); |
af213624 FF |
1319 | |
1320 | /* Check to see if we already have a partially constructed user | |
1321 | defined type for this DIE, from a forward reference. */ | |
1322 | ||
13b5a7ff | 1323 | if ((ftype = lookup_utype (dip -> die_ref)) == NULL) |
af213624 FF |
1324 | { |
1325 | /* This is the first reference to one of these types. Make | |
1326 | a new one and place it in the user defined types. */ | |
1327 | ftype = lookup_function_type (type); | |
4ed3a9ea | 1328 | alloc_utype (dip -> die_ref, ftype); |
af213624 FF |
1329 | } |
1330 | else | |
1331 | { | |
1332 | /* We have an existing partially constructed type, so bash it | |
1333 | into the correct type. */ | |
1334 | TYPE_TARGET_TYPE (ftype) = type; | |
1335 | TYPE_FUNCTION_TYPE (type) = ftype; | |
1336 | TYPE_LENGTH (ftype) = 1; | |
1337 | TYPE_CODE (ftype) = TYPE_CODE_FUNC; | |
1338 | } | |
35f5886e FF |
1339 | } |
1340 | ||
1341 | /* | |
1342 | ||
1343 | LOCAL FUNCTION | |
1344 | ||
1345 | read_enumeration -- process dies which define an enumeration | |
1346 | ||
1347 | SYNOPSIS | |
1348 | ||
1349 | static void read_enumeration (struct dieinfo *dip, char *thisdie, | |
1ab3bf1b | 1350 | char *enddie, struct objfile *objfile) |
35f5886e FF |
1351 | |
1352 | DESCRIPTION | |
1353 | ||
1354 | Given a pointer to a die which begins an enumeration, process all | |
1355 | the dies that define the members of the enumeration. | |
1356 | ||
1357 | NOTES | |
1358 | ||
1359 | Note that we need to call enum_type regardless of whether or not we | |
1360 | have a symbol, since we might have an enum without a tag name (thus | |
1361 | no symbol for the tagname). | |
1362 | */ | |
1363 | ||
1364 | static void | |
1ab3bf1b JG |
1365 | read_enumeration (dip, thisdie, enddie, objfile) |
1366 | struct dieinfo *dip; | |
1367 | char *thisdie; | |
1368 | char *enddie; | |
1369 | struct objfile *objfile; | |
35f5886e FF |
1370 | { |
1371 | struct type *type; | |
1372 | struct symbol *sym; | |
1373 | ||
1ab3bf1b JG |
1374 | type = enum_type (dip, objfile); |
1375 | if ((sym = new_symbol (dip, objfile)) != NULL) | |
35f5886e FF |
1376 | { |
1377 | SYMBOL_TYPE (sym) = type; | |
1378 | } | |
1379 | } | |
1380 | ||
1381 | /* | |
1382 | ||
1383 | LOCAL FUNCTION | |
1384 | ||
1385 | enum_type -- decode and return a type for an enumeration | |
1386 | ||
1387 | SYNOPSIS | |
1388 | ||
1ab3bf1b | 1389 | static type *enum_type (struct dieinfo *dip, struct objfile *objfile) |
35f5886e FF |
1390 | |
1391 | DESCRIPTION | |
1392 | ||
1393 | Given a pointer to a die information structure for the die which | |
1394 | starts an enumeration, process all the dies that define the members | |
1395 | of the enumeration and return a type pointer for the enumeration. | |
98618bf7 | 1396 | |
715cafcb FF |
1397 | At the same time, for each member of the enumeration, create a |
1398 | symbol for it with namespace VAR_NAMESPACE and class LOC_CONST, | |
1399 | and give it the type of the enumeration itself. | |
1400 | ||
1401 | NOTES | |
1402 | ||
98618bf7 FF |
1403 | Note that the DWARF specification explicitly mandates that enum |
1404 | constants occur in reverse order from the source program order, | |
1405 | for "consistency" and because this ordering is easier for many | |
1ab3bf1b | 1406 | compilers to generate. (Draft 6, sec 3.8.5, Enumeration type |
715cafcb FF |
1407 | Entries). Because gdb wants to see the enum members in program |
1408 | source order, we have to ensure that the order gets reversed while | |
98618bf7 | 1409 | we are processing them. |
35f5886e FF |
1410 | */ |
1411 | ||
1412 | static struct type * | |
1ab3bf1b JG |
1413 | enum_type (dip, objfile) |
1414 | struct dieinfo *dip; | |
1415 | struct objfile *objfile; | |
35f5886e FF |
1416 | { |
1417 | struct type *type; | |
1418 | struct nextfield { | |
1419 | struct nextfield *next; | |
1420 | struct field field; | |
1421 | }; | |
1422 | struct nextfield *list = NULL; | |
1423 | struct nextfield *new; | |
1424 | int nfields = 0; | |
1425 | int n; | |
35f5886e FF |
1426 | char *scan; |
1427 | char *listend; | |
13b5a7ff | 1428 | unsigned short blocksz; |
715cafcb | 1429 | struct symbol *sym; |
13b5a7ff | 1430 | int nbytes; |
35f5886e | 1431 | |
13b5a7ff | 1432 | if ((type = lookup_utype (dip -> die_ref)) == NULL) |
35f5886e | 1433 | { |
84ce6717 | 1434 | /* No forward references created an empty type, so install one now */ |
13b5a7ff | 1435 | type = alloc_utype (dip -> die_ref, NULL); |
35f5886e FF |
1436 | } |
1437 | TYPE_CODE (type) = TYPE_CODE_ENUM; | |
84ce6717 FF |
1438 | /* Some compilers try to be helpful by inventing "fake" names for |
1439 | anonymous enums, structures, and unions, like "~0fake" or ".0fake". | |
1440 | Thanks, but no thanks... */ | |
715cafcb FF |
1441 | if (dip -> at_name != NULL |
1442 | && *dip -> at_name != '~' | |
1443 | && *dip -> at_name != '.') | |
35f5886e | 1444 | { |
95967e73 | 1445 | TYPE_NAME (type) = obconcat (&objfile -> type_obstack, "enum", |
1ab3bf1b | 1446 | " ", dip -> at_name); |
35f5886e | 1447 | } |
715cafcb | 1448 | if (dip -> at_byte_size != 0) |
35f5886e FF |
1449 | { |
1450 | TYPE_LENGTH (type) = dip -> at_byte_size; | |
35f5886e | 1451 | } |
35f5886e FF |
1452 | if ((scan = dip -> at_element_list) != NULL) |
1453 | { | |
768be6e1 FF |
1454 | if (dip -> short_element_list) |
1455 | { | |
13b5a7ff | 1456 | nbytes = attribute_size (AT_short_element_list); |
768be6e1 FF |
1457 | } |
1458 | else | |
1459 | { | |
13b5a7ff | 1460 | nbytes = attribute_size (AT_element_list); |
768be6e1 | 1461 | } |
13b5a7ff FF |
1462 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); |
1463 | listend = scan + nbytes + blocksz; | |
1464 | scan += nbytes; | |
35f5886e FF |
1465 | while (scan < listend) |
1466 | { | |
1467 | new = (struct nextfield *) alloca (sizeof (struct nextfield)); | |
1468 | new -> next = list; | |
1469 | list = new; | |
1470 | list -> field.type = NULL; | |
1471 | list -> field.bitsize = 0; | |
13b5a7ff FF |
1472 | list -> field.bitpos = |
1473 | target_to_host (scan, TARGET_FT_LONG_SIZE (objfile), GET_SIGNED, | |
1474 | objfile); | |
1475 | scan += TARGET_FT_LONG_SIZE (objfile); | |
50e0dc41 FF |
1476 | list -> field.name = obsavestring (scan, strlen (scan), |
1477 | &objfile -> type_obstack); | |
35f5886e FF |
1478 | scan += strlen (scan) + 1; |
1479 | nfields++; | |
715cafcb | 1480 | /* Handcraft a new symbol for this enum member. */ |
1ab3bf1b | 1481 | sym = (struct symbol *) obstack_alloc (&objfile->symbol_obstack, |
715cafcb | 1482 | sizeof (struct symbol)); |
4ed3a9ea | 1483 | memset (sym, 0, sizeof (struct symbol)); |
13b5a7ff FF |
1484 | SYMBOL_NAME (sym) = create_name (list -> field.name, |
1485 | &objfile->symbol_obstack); | |
715cafcb FF |
1486 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; |
1487 | SYMBOL_CLASS (sym) = LOC_CONST; | |
1488 | SYMBOL_TYPE (sym) = type; | |
1489 | SYMBOL_VALUE (sym) = list -> field.bitpos; | |
4d315a07 | 1490 | add_symbol_to_list (sym, list_in_scope); |
35f5886e | 1491 | } |
84ce6717 | 1492 | /* Now create the vector of fields, and record how big it is. This is |
0efe20a6 | 1493 | where we reverse the order, by pulling the members off the list in |
84ce6717 FF |
1494 | reverse order from how they were inserted. If we have no fields |
1495 | (this is apparently possible in C++) then skip building a field | |
1496 | vector. */ | |
1497 | if (nfields > 0) | |
1498 | { | |
1499 | TYPE_NFIELDS (type) = nfields; | |
1500 | TYPE_FIELDS (type) = (struct field *) | |
1ab3bf1b | 1501 | obstack_alloc (&objfile->symbol_obstack, sizeof (struct field) * nfields); |
84ce6717 FF |
1502 | /* Copy the saved-up fields into the field vector. */ |
1503 | for (n = 0; (n < nfields) && (list != NULL); list = list -> next) | |
1504 | { | |
1505 | TYPE_FIELD (type, n++) = list -> field; | |
1506 | } | |
1507 | } | |
35f5886e | 1508 | } |
35f5886e FF |
1509 | return (type); |
1510 | } | |
1511 | ||
1512 | /* | |
1513 | ||
1514 | LOCAL FUNCTION | |
1515 | ||
1516 | read_func_scope -- process all dies within a function scope | |
1517 | ||
35f5886e FF |
1518 | DESCRIPTION |
1519 | ||
1520 | Process all dies within a given function scope. We are passed | |
1521 | a die information structure pointer DIP for the die which | |
1522 | starts the function scope, and pointers into the raw die data | |
1523 | that define the dies within the function scope. | |
1524 | ||
1525 | For now, we ignore lexical block scopes within the function. | |
1526 | The problem is that AT&T cc does not define a DWARF lexical | |
1527 | block scope for the function itself, while gcc defines a | |
1528 | lexical block scope for the function. We need to think about | |
1529 | how to handle this difference, or if it is even a problem. | |
1530 | (FIXME) | |
1531 | */ | |
1532 | ||
1533 | static void | |
1ab3bf1b JG |
1534 | read_func_scope (dip, thisdie, enddie, objfile) |
1535 | struct dieinfo *dip; | |
1536 | char *thisdie; | |
1537 | char *enddie; | |
1538 | struct objfile *objfile; | |
35f5886e | 1539 | { |
4d315a07 | 1540 | register struct context_stack *new; |
35f5886e | 1541 | |
5e2e79f8 FF |
1542 | if (objfile -> ei.entry_point >= dip -> at_low_pc && |
1543 | objfile -> ei.entry_point < dip -> at_high_pc) | |
35f5886e | 1544 | { |
5e2e79f8 FF |
1545 | objfile -> ei.entry_func_lowpc = dip -> at_low_pc; |
1546 | objfile -> ei.entry_func_highpc = dip -> at_high_pc; | |
35f5886e | 1547 | } |
4d315a07 | 1548 | if (STREQ (dip -> at_name, "main")) /* FIXME: hardwired name */ |
35f5886e | 1549 | { |
5e2e79f8 FF |
1550 | objfile -> ei.main_func_lowpc = dip -> at_low_pc; |
1551 | objfile -> ei.main_func_highpc = dip -> at_high_pc; | |
35f5886e | 1552 | } |
4d315a07 | 1553 | new = push_context (0, dip -> at_low_pc); |
1ab3bf1b | 1554 | new -> name = new_symbol (dip, objfile); |
4d315a07 | 1555 | list_in_scope = &local_symbols; |
13b5a7ff | 1556 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 FF |
1557 | new = pop_context (); |
1558 | /* Make a block for the local symbols within. */ | |
1559 | finish_block (new -> name, &local_symbols, new -> old_blocks, | |
1ab3bf1b | 1560 | new -> start_addr, dip -> at_high_pc, objfile); |
4d315a07 | 1561 | list_in_scope = &file_symbols; |
35f5886e FF |
1562 | } |
1563 | ||
2dbde378 FF |
1564 | |
1565 | /* | |
1566 | ||
1567 | LOCAL FUNCTION | |
1568 | ||
1569 | handle_producer -- process the AT_producer attribute | |
1570 | ||
1571 | DESCRIPTION | |
1572 | ||
1573 | Perform any operations that depend on finding a particular | |
1574 | AT_producer attribute. | |
1575 | ||
1576 | */ | |
1577 | ||
1578 | static void | |
1579 | handle_producer (producer) | |
1580 | char *producer; | |
1581 | { | |
1582 | ||
1583 | /* If this compilation unit was compiled with g++ or gcc, then set the | |
1584 | processing_gcc_compilation flag. */ | |
1585 | ||
1586 | processing_gcc_compilation = | |
1587 | STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER)) | |
1588 | || STREQN (producer, GCC_PRODUCER, strlen (GCC_PRODUCER)); | |
1589 | ||
1590 | /* Select a demangling style if we can identify the producer and if | |
1591 | the current style is auto. We leave the current style alone if it | |
1592 | is not auto. We also leave the demangling style alone if we find a | |
1593 | gcc (cc1) producer, as opposed to a g++ (cc1plus) producer. */ | |
1594 | ||
d23639b2 | 1595 | #if 1 /* Works, but is experimental. -fnf */ |
2dbde378 FF |
1596 | if (current_demangling_style == auto_demangling) |
1597 | { | |
1598 | if (STREQN (producer, GPLUS_PRODUCER, strlen (GPLUS_PRODUCER))) | |
1599 | { | |
1600 | set_demangling_style (GNU_DEMANGLING_STYLE_STRING); | |
1601 | } | |
1602 | else if (STREQN (producer, LCC_PRODUCER, strlen (LCC_PRODUCER))) | |
1603 | { | |
1604 | set_demangling_style (LUCID_DEMANGLING_STYLE_STRING); | |
1605 | } | |
1606 | else if (STREQN (producer, CFRONT_PRODUCER, strlen (CFRONT_PRODUCER))) | |
1607 | { | |
1608 | set_demangling_style (CFRONT_DEMANGLING_STYLE_STRING); | |
1609 | } | |
1610 | } | |
1611 | #endif | |
1612 | } | |
1613 | ||
1614 | ||
35f5886e FF |
1615 | /* |
1616 | ||
1617 | LOCAL FUNCTION | |
1618 | ||
1619 | read_file_scope -- process all dies within a file scope | |
1620 | ||
35f5886e FF |
1621 | DESCRIPTION |
1622 | ||
1623 | Process all dies within a given file scope. We are passed a | |
1624 | pointer to the die information structure for the die which | |
1625 | starts the file scope, and pointers into the raw die data which | |
1626 | mark the range of dies within the file scope. | |
1627 | ||
1628 | When the partial symbol table is built, the file offset for the line | |
1629 | number table for each compilation unit is saved in the partial symbol | |
1630 | table entry for that compilation unit. As the symbols for each | |
1631 | compilation unit are read, the line number table is read into memory | |
1632 | and the variable lnbase is set to point to it. Thus all we have to | |
1633 | do is use lnbase to access the line number table for the current | |
1634 | compilation unit. | |
1635 | */ | |
1636 | ||
1637 | static void | |
1ab3bf1b JG |
1638 | read_file_scope (dip, thisdie, enddie, objfile) |
1639 | struct dieinfo *dip; | |
1640 | char *thisdie; | |
1641 | char *enddie; | |
1642 | struct objfile *objfile; | |
35f5886e FF |
1643 | { |
1644 | struct cleanup *back_to; | |
4d315a07 | 1645 | struct symtab *symtab; |
35f5886e | 1646 | |
5e2e79f8 FF |
1647 | if (objfile -> ei.entry_point >= dip -> at_low_pc && |
1648 | objfile -> ei.entry_point < dip -> at_high_pc) | |
35f5886e | 1649 | { |
5e2e79f8 FF |
1650 | objfile -> ei.entry_file_lowpc = dip -> at_low_pc; |
1651 | objfile -> ei.entry_file_highpc = dip -> at_high_pc; | |
35f5886e | 1652 | } |
4d315a07 FF |
1653 | if (dip -> at_producer != NULL) |
1654 | { | |
2dbde378 | 1655 | handle_producer (dip -> at_producer); |
4d315a07 | 1656 | } |
35f5886e FF |
1657 | numutypes = (enddie - thisdie) / 4; |
1658 | utypes = (struct type **) xmalloc (numutypes * sizeof (struct type *)); | |
1659 | back_to = make_cleanup (free, utypes); | |
4ed3a9ea | 1660 | memset (utypes, 0, numutypes * sizeof (struct type *)); |
d4902ab0 | 1661 | start_symtab (dip -> at_name, dip -> at_comp_dir, dip -> at_low_pc); |
35f5886e | 1662 | decode_line_numbers (lnbase); |
13b5a7ff | 1663 | process_dies (thisdie + dip -> die_length, enddie, objfile); |
4d315a07 | 1664 | symtab = end_symtab (dip -> at_high_pc, 0, 0, objfile); |
7b5d9650 | 1665 | if (symtab != NULL) |
4d315a07 | 1666 | { |
7b5d9650 FF |
1667 | /* FIXME: The following may need to be expanded for other languages */ |
1668 | switch (dip -> at_language) | |
1669 | { | |
1670 | case LANG_C89: | |
1671 | case LANG_C: | |
1672 | symtab -> language = language_c; | |
1673 | break; | |
1674 | case LANG_C_PLUS_PLUS: | |
1675 | symtab -> language = language_cplus; | |
1676 | break; | |
1677 | default: | |
1678 | ; | |
1679 | } | |
1680 | } | |
35f5886e FF |
1681 | do_cleanups (back_to); |
1682 | utypes = NULL; | |
1683 | numutypes = 0; | |
1684 | } | |
1685 | ||
1686 | /* | |
1687 | ||
35f5886e FF |
1688 | LOCAL FUNCTION |
1689 | ||
1690 | process_dies -- process a range of DWARF Information Entries | |
1691 | ||
1692 | SYNOPSIS | |
1693 | ||
8b5b6fae FF |
1694 | static void process_dies (char *thisdie, char *enddie, |
1695 | struct objfile *objfile) | |
35f5886e FF |
1696 | |
1697 | DESCRIPTION | |
1698 | ||
1699 | Process all DIE's in a specified range. May be (and almost | |
1700 | certainly will be) called recursively. | |
1701 | */ | |
1702 | ||
1703 | static void | |
1ab3bf1b JG |
1704 | process_dies (thisdie, enddie, objfile) |
1705 | char *thisdie; | |
1706 | char *enddie; | |
1707 | struct objfile *objfile; | |
35f5886e FF |
1708 | { |
1709 | char *nextdie; | |
1710 | struct dieinfo di; | |
1711 | ||
1712 | while (thisdie < enddie) | |
1713 | { | |
95967e73 | 1714 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 1715 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
1716 | { |
1717 | break; | |
1718 | } | |
13b5a7ff | 1719 | else if (di.die_tag == TAG_padding) |
35f5886e | 1720 | { |
13b5a7ff | 1721 | nextdie = thisdie + di.die_length; |
35f5886e FF |
1722 | } |
1723 | else | |
1724 | { | |
95967e73 | 1725 | completedieinfo (&di, objfile); |
35f5886e FF |
1726 | if (di.at_sibling != 0) |
1727 | { | |
1728 | nextdie = dbbase + di.at_sibling - dbroff; | |
1729 | } | |
1730 | else | |
1731 | { | |
13b5a7ff | 1732 | nextdie = thisdie + di.die_length; |
35f5886e | 1733 | } |
13b5a7ff | 1734 | switch (di.die_tag) |
35f5886e FF |
1735 | { |
1736 | case TAG_compile_unit: | |
a048c8f5 | 1737 | read_file_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
1738 | break; |
1739 | case TAG_global_subroutine: | |
1740 | case TAG_subroutine: | |
2d6186f4 | 1741 | if (di.has_at_low_pc) |
35f5886e | 1742 | { |
a048c8f5 | 1743 | read_func_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
1744 | } |
1745 | break; | |
1746 | case TAG_lexical_block: | |
a048c8f5 | 1747 | read_lexical_block_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
1748 | break; |
1749 | case TAG_structure_type: | |
1750 | case TAG_union_type: | |
8b5b6fae | 1751 | read_structure_scope (&di, thisdie, nextdie, objfile); |
35f5886e FF |
1752 | break; |
1753 | case TAG_enumeration_type: | |
1ab3bf1b | 1754 | read_enumeration (&di, thisdie, nextdie, objfile); |
35f5886e FF |
1755 | break; |
1756 | case TAG_subroutine_type: | |
1757 | read_subroutine_type (&di, thisdie, nextdie); | |
1758 | break; | |
1759 | case TAG_array_type: | |
4d315a07 | 1760 | dwarf_read_array_type (&di); |
35f5886e | 1761 | break; |
9e4c1921 FF |
1762 | case TAG_pointer_type: |
1763 | read_tag_pointer_type (&di); | |
1764 | break; | |
35f5886e | 1765 | default: |
4ed3a9ea | 1766 | new_symbol (&di, objfile); |
35f5886e FF |
1767 | break; |
1768 | } | |
1769 | } | |
1770 | thisdie = nextdie; | |
1771 | } | |
1772 | } | |
1773 | ||
1774 | /* | |
1775 | ||
35f5886e FF |
1776 | LOCAL FUNCTION |
1777 | ||
1778 | decode_line_numbers -- decode a line number table fragment | |
1779 | ||
1780 | SYNOPSIS | |
1781 | ||
1782 | static void decode_line_numbers (char *tblscan, char *tblend, | |
1783 | long length, long base, long line, long pc) | |
1784 | ||
1785 | DESCRIPTION | |
1786 | ||
1787 | Translate the DWARF line number information to gdb form. | |
1788 | ||
1789 | The ".line" section contains one or more line number tables, one for | |
1790 | each ".line" section from the objects that were linked. | |
1791 | ||
1792 | The AT_stmt_list attribute for each TAG_source_file entry in the | |
1793 | ".debug" section contains the offset into the ".line" section for the | |
1794 | start of the table for that file. | |
1795 | ||
1796 | The table itself has the following structure: | |
1797 | ||
1798 | <table length><base address><source statement entry> | |
1799 | 4 bytes 4 bytes 10 bytes | |
1800 | ||
1801 | The table length is the total size of the table, including the 4 bytes | |
1802 | for the length information. | |
1803 | ||
1804 | The base address is the address of the first instruction generated | |
1805 | for the source file. | |
1806 | ||
1807 | Each source statement entry has the following structure: | |
1808 | ||
1809 | <line number><statement position><address delta> | |
1810 | 4 bytes 2 bytes 4 bytes | |
1811 | ||
1812 | The line number is relative to the start of the file, starting with | |
1813 | line 1. | |
1814 | ||
1815 | The statement position either -1 (0xFFFF) or the number of characters | |
1816 | from the beginning of the line to the beginning of the statement. | |
1817 | ||
1818 | The address delta is the difference between the base address and | |
1819 | the address of the first instruction for the statement. | |
1820 | ||
1821 | Note that we must copy the bytes from the packed table to our local | |
1822 | variables before attempting to use them, to avoid alignment problems | |
1823 | on some machines, particularly RISC processors. | |
1824 | ||
1825 | BUGS | |
1826 | ||
1827 | Does gdb expect the line numbers to be sorted? They are now by | |
1828 | chance/luck, but are not required to be. (FIXME) | |
1829 | ||
1830 | The line with number 0 is unused, gdb apparently can discover the | |
1831 | span of the last line some other way. How? (FIXME) | |
1832 | */ | |
1833 | ||
1834 | static void | |
1ab3bf1b JG |
1835 | decode_line_numbers (linetable) |
1836 | char *linetable; | |
35f5886e FF |
1837 | { |
1838 | char *tblscan; | |
1839 | char *tblend; | |
13b5a7ff FF |
1840 | unsigned long length; |
1841 | unsigned long base; | |
1842 | unsigned long line; | |
1843 | unsigned long pc; | |
35f5886e FF |
1844 | |
1845 | if (linetable != NULL) | |
1846 | { | |
1847 | tblscan = tblend = linetable; | |
13b5a7ff FF |
1848 | length = target_to_host (tblscan, SIZEOF_LINETBL_LENGTH, GET_UNSIGNED, |
1849 | current_objfile); | |
1850 | tblscan += SIZEOF_LINETBL_LENGTH; | |
35f5886e | 1851 | tblend += length; |
13b5a7ff FF |
1852 | base = target_to_host (tblscan, TARGET_FT_POINTER_SIZE (objfile), |
1853 | GET_UNSIGNED, current_objfile); | |
1854 | tblscan += TARGET_FT_POINTER_SIZE (objfile); | |
35f5886e | 1855 | base += baseaddr; |
35f5886e FF |
1856 | while (tblscan < tblend) |
1857 | { | |
13b5a7ff FF |
1858 | line = target_to_host (tblscan, SIZEOF_LINETBL_LINENO, GET_UNSIGNED, |
1859 | current_objfile); | |
1860 | tblscan += SIZEOF_LINETBL_LINENO + SIZEOF_LINETBL_STMT; | |
1861 | pc = target_to_host (tblscan, SIZEOF_LINETBL_DELTA, GET_UNSIGNED, | |
1862 | current_objfile); | |
1863 | tblscan += SIZEOF_LINETBL_DELTA; | |
35f5886e | 1864 | pc += base; |
13b5a7ff | 1865 | if (line != 0) |
35f5886e | 1866 | { |
4d315a07 | 1867 | record_line (current_subfile, line, pc); |
35f5886e FF |
1868 | } |
1869 | } | |
1870 | } | |
1871 | } | |
1872 | ||
1873 | /* | |
1874 | ||
35f5886e FF |
1875 | LOCAL FUNCTION |
1876 | ||
1877 | locval -- compute the value of a location attribute | |
1878 | ||
1879 | SYNOPSIS | |
1880 | ||
1881 | static int locval (char *loc) | |
1882 | ||
1883 | DESCRIPTION | |
1884 | ||
1885 | Given pointer to a string of bytes that define a location, compute | |
1886 | the location and return the value. | |
1887 | ||
1888 | When computing values involving the current value of the frame pointer, | |
1889 | the value zero is used, which results in a value relative to the frame | |
1890 | pointer, rather than the absolute value. This is what GDB wants | |
1891 | anyway. | |
1892 | ||
1893 | When the result is a register number, the global isreg flag is set, | |
1894 | otherwise it is cleared. This is a kludge until we figure out a better | |
1895 | way to handle the problem. Gdb's design does not mesh well with the | |
1896 | DWARF notion of a location computing interpreter, which is a shame | |
1897 | because the flexibility goes unused. | |
1898 | ||
1899 | NOTES | |
1900 | ||
1901 | Note that stack[0] is unused except as a default error return. | |
1902 | Note that stack overflow is not yet handled. | |
1903 | */ | |
1904 | ||
1905 | static int | |
1ab3bf1b JG |
1906 | locval (loc) |
1907 | char *loc; | |
35f5886e FF |
1908 | { |
1909 | unsigned short nbytes; | |
13b5a7ff FF |
1910 | unsigned short locsize; |
1911 | auto long stack[64]; | |
35f5886e FF |
1912 | int stacki; |
1913 | char *end; | |
1914 | long regno; | |
13b5a7ff FF |
1915 | int loc_atom_code; |
1916 | int loc_value_size; | |
35f5886e | 1917 | |
13b5a7ff FF |
1918 | nbytes = attribute_size (AT_location); |
1919 | locsize = target_to_host (loc, nbytes, GET_UNSIGNED, current_objfile); | |
1920 | loc += nbytes; | |
1921 | end = loc + locsize; | |
35f5886e FF |
1922 | stacki = 0; |
1923 | stack[stacki] = 0; | |
1924 | isreg = 0; | |
a5bd5ba6 | 1925 | offreg = 0; |
13b5a7ff FF |
1926 | loc_value_size = TARGET_FT_LONG_SIZE (current_objfile); |
1927 | while (loc < end) | |
35f5886e | 1928 | { |
13b5a7ff FF |
1929 | loc_atom_code = target_to_host (loc, SIZEOF_LOC_ATOM_CODE, GET_UNSIGNED, |
1930 | current_objfile); | |
1931 | loc += SIZEOF_LOC_ATOM_CODE; | |
1932 | switch (loc_atom_code) | |
1933 | { | |
1934 | case 0: | |
1935 | /* error */ | |
1936 | loc = end; | |
1937 | break; | |
1938 | case OP_REG: | |
1939 | /* push register (number) */ | |
1940 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
1941 | GET_UNSIGNED, current_objfile); | |
1942 | loc += loc_value_size; | |
1943 | isreg = 1; | |
1944 | break; | |
1945 | case OP_BASEREG: | |
1946 | /* push value of register (number) */ | |
1947 | /* Actually, we compute the value as if register has 0 */ | |
1948 | offreg = 1; | |
1949 | regno = target_to_host (loc, loc_value_size, GET_UNSIGNED, | |
1950 | current_objfile); | |
1951 | loc += loc_value_size; | |
1952 | if (regno == R_FP) | |
1953 | { | |
1954 | stack[++stacki] = 0; | |
1955 | } | |
1956 | else | |
1957 | { | |
1958 | stack[++stacki] = 0; | |
1959 | SQUAWK (("BASEREG %d not handled!", regno)); | |
1960 | } | |
1961 | break; | |
1962 | case OP_ADDR: | |
1963 | /* push address (relocated address) */ | |
1964 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
1965 | GET_UNSIGNED, current_objfile); | |
1966 | loc += loc_value_size; | |
1967 | break; | |
1968 | case OP_CONST: | |
1969 | /* push constant (number) FIXME: signed or unsigned! */ | |
1970 | stack[++stacki] = target_to_host (loc, loc_value_size, | |
1971 | GET_SIGNED, current_objfile); | |
1972 | loc += loc_value_size; | |
1973 | break; | |
1974 | case OP_DEREF2: | |
1975 | /* pop, deref and push 2 bytes (as a long) */ | |
1976 | SQUAWK (("OP_DEREF2 address 0x%x not handled", stack[stacki])); | |
1977 | break; | |
1978 | case OP_DEREF4: /* pop, deref and push 4 bytes (as a long) */ | |
1979 | SQUAWK (("OP_DEREF4 address 0x%x not handled", stack[stacki])); | |
1980 | break; | |
1981 | case OP_ADD: /* pop top 2 items, add, push result */ | |
1982 | stack[stacki - 1] += stack[stacki]; | |
1983 | stacki--; | |
1984 | break; | |
1985 | } | |
35f5886e FF |
1986 | } |
1987 | return (stack[stacki]); | |
1988 | } | |
1989 | ||
1990 | /* | |
1991 | ||
1992 | LOCAL FUNCTION | |
1993 | ||
1994 | read_ofile_symtab -- build a full symtab entry from chunk of DIE's | |
1995 | ||
1996 | SYNOPSIS | |
1997 | ||
a048c8f5 | 1998 | static struct symtab *read_ofile_symtab (struct partial_symtab *pst) |
35f5886e FF |
1999 | |
2000 | DESCRIPTION | |
2001 | ||
1ab3bf1b JG |
2002 | When expanding a partial symbol table entry to a full symbol table |
2003 | entry, this is the function that gets called to read in the symbols | |
2004 | for the compilation unit. | |
2005 | ||
2006 | Returns a pointer to the newly constructed symtab (which is now | |
2007 | the new first one on the objfile's symtab list). | |
35f5886e FF |
2008 | */ |
2009 | ||
2010 | static struct symtab * | |
1ab3bf1b JG |
2011 | read_ofile_symtab (pst) |
2012 | struct partial_symtab *pst; | |
35f5886e FF |
2013 | { |
2014 | struct cleanup *back_to; | |
13b5a7ff | 2015 | unsigned long lnsize; |
35f5886e | 2016 | int foffset; |
1ab3bf1b | 2017 | bfd *abfd; |
13b5a7ff | 2018 | char lnsizedata[SIZEOF_LINETBL_LENGTH]; |
1ab3bf1b JG |
2019 | |
2020 | abfd = pst -> objfile -> obfd; | |
2021 | current_objfile = pst -> objfile; | |
2022 | ||
35f5886e FF |
2023 | /* Allocate a buffer for the entire chunk of DIE's for this compilation |
2024 | unit, seek to the location in the file, and read in all the DIE's. */ | |
2025 | ||
2026 | diecount = 0; | |
2027 | dbbase = xmalloc (DBLENGTH(pst)); | |
2028 | dbroff = DBROFF(pst); | |
2029 | foffset = DBFOFF(pst) + dbroff; | |
2670f34d JG |
2030 | base_section_offsets = pst->section_offsets; |
2031 | baseaddr = ANOFFSET (pst->section_offsets, 0); | |
a048c8f5 JG |
2032 | if (bfd_seek (abfd, foffset, 0) || |
2033 | (bfd_read (dbbase, DBLENGTH(pst), 1, abfd) != DBLENGTH(pst))) | |
35f5886e FF |
2034 | { |
2035 | free (dbbase); | |
2036 | error ("can't read DWARF data"); | |
2037 | } | |
2038 | back_to = make_cleanup (free, dbbase); | |
2039 | ||
2040 | /* If there is a line number table associated with this compilation unit | |
13b5a7ff FF |
2041 | then read the size of this fragment in bytes, from the fragment itself. |
2042 | Allocate a buffer for the fragment and read it in for future | |
35f5886e FF |
2043 | processing. */ |
2044 | ||
2045 | lnbase = NULL; | |
2046 | if (LNFOFF (pst)) | |
2047 | { | |
a048c8f5 | 2048 | if (bfd_seek (abfd, LNFOFF (pst), 0) || |
13b5a7ff FF |
2049 | (bfd_read ((PTR) lnsizedata, sizeof (lnsizedata), 1, abfd) != |
2050 | sizeof (lnsizedata))) | |
35f5886e FF |
2051 | { |
2052 | error ("can't read DWARF line number table size"); | |
2053 | } | |
13b5a7ff FF |
2054 | lnsize = target_to_host (lnsizedata, SIZEOF_LINETBL_LENGTH, |
2055 | GET_UNSIGNED, pst -> objfile); | |
35f5886e | 2056 | lnbase = xmalloc (lnsize); |
a048c8f5 JG |
2057 | if (bfd_seek (abfd, LNFOFF (pst), 0) || |
2058 | (bfd_read (lnbase, lnsize, 1, abfd) != lnsize)) | |
35f5886e FF |
2059 | { |
2060 | free (lnbase); | |
2061 | error ("can't read DWARF line numbers"); | |
2062 | } | |
2063 | make_cleanup (free, lnbase); | |
2064 | } | |
2065 | ||
f8b76e70 | 2066 | process_dies (dbbase, dbbase + DBLENGTH(pst), pst -> objfile); |
35f5886e | 2067 | do_cleanups (back_to); |
1ab3bf1b JG |
2068 | current_objfile = NULL; |
2069 | return (pst -> objfile -> symtabs); | |
35f5886e FF |
2070 | } |
2071 | ||
2072 | /* | |
2073 | ||
2074 | LOCAL FUNCTION | |
2075 | ||
2076 | psymtab_to_symtab_1 -- do grunt work for building a full symtab entry | |
2077 | ||
2078 | SYNOPSIS | |
2079 | ||
a048c8f5 | 2080 | static void psymtab_to_symtab_1 (struct partial_symtab *pst) |
35f5886e FF |
2081 | |
2082 | DESCRIPTION | |
2083 | ||
2084 | Called once for each partial symbol table entry that needs to be | |
2085 | expanded into a full symbol table entry. | |
2086 | ||
2087 | */ | |
2088 | ||
2089 | static void | |
1ab3bf1b JG |
2090 | psymtab_to_symtab_1 (pst) |
2091 | struct partial_symtab *pst; | |
35f5886e FF |
2092 | { |
2093 | int i; | |
d07734e3 | 2094 | struct cleanup *old_chain; |
35f5886e | 2095 | |
1ab3bf1b | 2096 | if (pst != NULL) |
35f5886e | 2097 | { |
1ab3bf1b | 2098 | if (pst->readin) |
35f5886e | 2099 | { |
318bf84f | 2100 | warning ("psymtab for %s already read in. Shouldn't happen.", |
1ab3bf1b JG |
2101 | pst -> filename); |
2102 | } | |
2103 | else | |
2104 | { | |
2105 | /* Read in all partial symtabs on which this one is dependent */ | |
2106 | for (i = 0; i < pst -> number_of_dependencies; i++) | |
2107 | { | |
2108 | if (!pst -> dependencies[i] -> readin) | |
2109 | { | |
2110 | /* Inform about additional files that need to be read in. */ | |
2111 | if (info_verbose) | |
2112 | { | |
2113 | fputs_filtered (" ", stdout); | |
2114 | wrap_here (""); | |
2115 | fputs_filtered ("and ", stdout); | |
2116 | wrap_here (""); | |
2117 | printf_filtered ("%s...", | |
2118 | pst -> dependencies[i] -> filename); | |
2119 | wrap_here (""); | |
2120 | fflush (stdout); /* Flush output */ | |
2121 | } | |
2122 | psymtab_to_symtab_1 (pst -> dependencies[i]); | |
2123 | } | |
2124 | } | |
2125 | if (DBLENGTH (pst)) /* Otherwise it's a dummy */ | |
2126 | { | |
d07734e3 FF |
2127 | buildsym_init (); |
2128 | old_chain = make_cleanup (really_free_pendings, 0); | |
1ab3bf1b JG |
2129 | pst -> symtab = read_ofile_symtab (pst); |
2130 | if (info_verbose) | |
2131 | { | |
2132 | printf_filtered ("%d DIE's, sorting...", diecount); | |
2133 | wrap_here (""); | |
2134 | fflush (stdout); | |
2135 | } | |
2136 | sort_symtab_syms (pst -> symtab); | |
d07734e3 | 2137 | do_cleanups (old_chain); |
1ab3bf1b JG |
2138 | } |
2139 | pst -> readin = 1; | |
35f5886e | 2140 | } |
35f5886e | 2141 | } |
35f5886e FF |
2142 | } |
2143 | ||
2144 | /* | |
2145 | ||
2146 | LOCAL FUNCTION | |
2147 | ||
2148 | dwarf_psymtab_to_symtab -- build a full symtab entry from partial one | |
2149 | ||
2150 | SYNOPSIS | |
2151 | ||
2152 | static void dwarf_psymtab_to_symtab (struct partial_symtab *pst) | |
2153 | ||
2154 | DESCRIPTION | |
2155 | ||
2156 | This is the DWARF support entry point for building a full symbol | |
2157 | table entry from a partial symbol table entry. We are passed a | |
2158 | pointer to the partial symbol table entry that needs to be expanded. | |
2159 | ||
2160 | */ | |
2161 | ||
2162 | static void | |
1ab3bf1b JG |
2163 | dwarf_psymtab_to_symtab (pst) |
2164 | struct partial_symtab *pst; | |
35f5886e | 2165 | { |
7d9884b9 | 2166 | |
1ab3bf1b | 2167 | if (pst != NULL) |
35f5886e | 2168 | { |
1ab3bf1b | 2169 | if (pst -> readin) |
35f5886e | 2170 | { |
318bf84f | 2171 | warning ("psymtab for %s already read in. Shouldn't happen.", |
1ab3bf1b | 2172 | pst -> filename); |
35f5886e | 2173 | } |
1ab3bf1b | 2174 | else |
35f5886e | 2175 | { |
1ab3bf1b JG |
2176 | if (DBLENGTH (pst) || pst -> number_of_dependencies) |
2177 | { | |
2178 | /* Print the message now, before starting serious work, to avoid | |
2179 | disconcerting pauses. */ | |
2180 | if (info_verbose) | |
2181 | { | |
2182 | printf_filtered ("Reading in symbols for %s...", | |
2183 | pst -> filename); | |
2184 | fflush (stdout); | |
2185 | } | |
2186 | ||
2187 | psymtab_to_symtab_1 (pst); | |
2188 | ||
2189 | #if 0 /* FIXME: Check to see what dbxread is doing here and see if | |
2190 | we need to do an equivalent or is this something peculiar to | |
2191 | stabs/a.out format. | |
2192 | Match with global symbols. This only needs to be done once, | |
2193 | after all of the symtabs and dependencies have been read in. | |
2194 | */ | |
2195 | scan_file_globals (pst -> objfile); | |
2196 | #endif | |
2197 | ||
2198 | /* Finish up the verbose info message. */ | |
2199 | if (info_verbose) | |
2200 | { | |
2201 | printf_filtered ("done.\n"); | |
2202 | fflush (stdout); | |
2203 | } | |
2204 | } | |
35f5886e FF |
2205 | } |
2206 | } | |
2207 | } | |
2208 | ||
2209 | /* | |
2210 | ||
2211 | LOCAL FUNCTION | |
2212 | ||
2213 | init_psymbol_list -- initialize storage for partial symbols | |
2214 | ||
2215 | SYNOPSIS | |
2216 | ||
1ab3bf1b | 2217 | static void init_psymbol_list (struct objfile *objfile, int total_symbols) |
35f5886e FF |
2218 | |
2219 | DESCRIPTION | |
2220 | ||
2221 | Initializes storage for all of the partial symbols that will be | |
2222 | created by dwarf_build_psymtabs and subsidiaries. | |
2223 | */ | |
2224 | ||
2225 | static void | |
1ab3bf1b JG |
2226 | init_psymbol_list (objfile, total_symbols) |
2227 | struct objfile *objfile; | |
2228 | int total_symbols; | |
35f5886e FF |
2229 | { |
2230 | /* Free any previously allocated psymbol lists. */ | |
2231 | ||
1ab3bf1b | 2232 | if (objfile -> global_psymbols.list) |
35f5886e | 2233 | { |
84ffdec2 | 2234 | mfree (objfile -> md, (PTR)objfile -> global_psymbols.list); |
35f5886e | 2235 | } |
1ab3bf1b | 2236 | if (objfile -> static_psymbols.list) |
35f5886e | 2237 | { |
84ffdec2 | 2238 | mfree (objfile -> md, (PTR)objfile -> static_psymbols.list); |
35f5886e FF |
2239 | } |
2240 | ||
2241 | /* Current best guess is that there are approximately a twentieth | |
2242 | of the total symbols (in a debugging file) are global or static | |
2243 | oriented symbols */ | |
2244 | ||
1ab3bf1b JG |
2245 | objfile -> global_psymbols.size = total_symbols / 10; |
2246 | objfile -> static_psymbols.size = total_symbols / 10; | |
2247 | objfile -> global_psymbols.next = | |
2248 | objfile -> global_psymbols.list = (struct partial_symbol *) | |
318bf84f | 2249 | xmmalloc (objfile -> md, objfile -> global_psymbols.size |
1ab3bf1b JG |
2250 | * sizeof (struct partial_symbol)); |
2251 | objfile -> static_psymbols.next = | |
2252 | objfile -> static_psymbols.list = (struct partial_symbol *) | |
318bf84f | 2253 | xmmalloc (objfile -> md, objfile -> static_psymbols.size |
1ab3bf1b | 2254 | * sizeof (struct partial_symbol)); |
35f5886e FF |
2255 | } |
2256 | ||
35f5886e FF |
2257 | /* |
2258 | ||
715cafcb FF |
2259 | LOCAL FUNCTION |
2260 | ||
2261 | add_enum_psymbol -- add enumeration members to partial symbol table | |
2262 | ||
2263 | DESCRIPTION | |
2264 | ||
2265 | Given pointer to a DIE that is known to be for an enumeration, | |
2266 | extract the symbolic names of the enumeration members and add | |
2267 | partial symbols for them. | |
2268 | */ | |
2269 | ||
2270 | static void | |
1ab3bf1b JG |
2271 | add_enum_psymbol (dip, objfile) |
2272 | struct dieinfo *dip; | |
2273 | struct objfile *objfile; | |
715cafcb FF |
2274 | { |
2275 | char *scan; | |
2276 | char *listend; | |
13b5a7ff FF |
2277 | unsigned short blocksz; |
2278 | int nbytes; | |
715cafcb FF |
2279 | |
2280 | if ((scan = dip -> at_element_list) != NULL) | |
2281 | { | |
2282 | if (dip -> short_element_list) | |
2283 | { | |
13b5a7ff | 2284 | nbytes = attribute_size (AT_short_element_list); |
715cafcb FF |
2285 | } |
2286 | else | |
2287 | { | |
13b5a7ff | 2288 | nbytes = attribute_size (AT_element_list); |
715cafcb | 2289 | } |
13b5a7ff FF |
2290 | blocksz = target_to_host (scan, nbytes, GET_UNSIGNED, objfile); |
2291 | scan += nbytes; | |
2292 | listend = scan + blocksz; | |
715cafcb FF |
2293 | while (scan < listend) |
2294 | { | |
13b5a7ff | 2295 | scan += TARGET_FT_LONG_SIZE (objfile); |
b440b1e9 | 2296 | ADD_PSYMBOL_TO_LIST (scan, strlen (scan), VAR_NAMESPACE, LOC_CONST, |
1ab3bf1b | 2297 | objfile -> static_psymbols, 0); |
715cafcb FF |
2298 | scan += strlen (scan) + 1; |
2299 | } | |
2300 | } | |
2301 | } | |
2302 | ||
2303 | /* | |
2304 | ||
35f5886e FF |
2305 | LOCAL FUNCTION |
2306 | ||
2307 | add_partial_symbol -- add symbol to partial symbol table | |
2308 | ||
2309 | DESCRIPTION | |
2310 | ||
2311 | Given a DIE, if it is one of the types that we want to | |
2312 | add to a partial symbol table, finish filling in the die info | |
2313 | and then add a partial symbol table entry for it. | |
2314 | ||
2315 | */ | |
2316 | ||
2317 | static void | |
1ab3bf1b JG |
2318 | add_partial_symbol (dip, objfile) |
2319 | struct dieinfo *dip; | |
2320 | struct objfile *objfile; | |
35f5886e | 2321 | { |
13b5a7ff | 2322 | switch (dip -> die_tag) |
35f5886e FF |
2323 | { |
2324 | case TAG_global_subroutine: | |
1ab3bf1b JG |
2325 | record_minimal_symbol (dip -> at_name, dip -> at_low_pc, mst_text, |
2326 | objfile); | |
b440b1e9 | 2327 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2328 | VAR_NAMESPACE, LOC_BLOCK, |
2329 | objfile -> global_psymbols, | |
b440b1e9 | 2330 | dip -> at_low_pc); |
35f5886e FF |
2331 | break; |
2332 | case TAG_global_variable: | |
1ab3bf1b JG |
2333 | record_minimal_symbol (dip -> at_name, locval (dip -> at_location), |
2334 | mst_data, objfile); | |
b440b1e9 | 2335 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2336 | VAR_NAMESPACE, LOC_STATIC, |
2337 | objfile -> global_psymbols, | |
b440b1e9 | 2338 | 0); |
35f5886e FF |
2339 | break; |
2340 | case TAG_subroutine: | |
b440b1e9 | 2341 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2342 | VAR_NAMESPACE, LOC_BLOCK, |
2343 | objfile -> static_psymbols, | |
b440b1e9 | 2344 | dip -> at_low_pc); |
35f5886e FF |
2345 | break; |
2346 | case TAG_local_variable: | |
b440b1e9 | 2347 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2348 | VAR_NAMESPACE, LOC_STATIC, |
2349 | objfile -> static_psymbols, | |
b440b1e9 | 2350 | 0); |
35f5886e FF |
2351 | break; |
2352 | case TAG_typedef: | |
b440b1e9 | 2353 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2354 | VAR_NAMESPACE, LOC_TYPEDEF, |
2355 | objfile -> static_psymbols, | |
b440b1e9 | 2356 | 0); |
35f5886e FF |
2357 | break; |
2358 | case TAG_structure_type: | |
2359 | case TAG_union_type: | |
b440b1e9 | 2360 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2361 | STRUCT_NAMESPACE, LOC_TYPEDEF, |
2362 | objfile -> static_psymbols, | |
b440b1e9 | 2363 | 0); |
35f5886e | 2364 | break; |
715cafcb FF |
2365 | case TAG_enumeration_type: |
2366 | if (dip -> at_name) | |
2367 | { | |
b440b1e9 | 2368 | ADD_PSYMBOL_TO_LIST (dip -> at_name, strlen (dip -> at_name), |
1ab3bf1b JG |
2369 | STRUCT_NAMESPACE, LOC_TYPEDEF, |
2370 | objfile -> static_psymbols, | |
b440b1e9 | 2371 | 0); |
715cafcb | 2372 | } |
1ab3bf1b | 2373 | add_enum_psymbol (dip, objfile); |
715cafcb | 2374 | break; |
35f5886e FF |
2375 | } |
2376 | } | |
2377 | ||
2378 | /* | |
2379 | ||
2380 | LOCAL FUNCTION | |
2381 | ||
2382 | scan_partial_symbols -- scan DIE's within a single compilation unit | |
2383 | ||
2384 | DESCRIPTION | |
2385 | ||
2386 | Process the DIE's within a single compilation unit, looking for | |
2387 | interesting DIE's that contribute to the partial symbol table entry | |
a679650f | 2388 | for this compilation unit. |
35f5886e | 2389 | |
2d6186f4 FF |
2390 | NOTES |
2391 | ||
a679650f FF |
2392 | There are some DIE's that may appear both at file scope and within |
2393 | the scope of a function. We are only interested in the ones at file | |
2394 | scope, and the only way to tell them apart is to keep track of the | |
2395 | scope. For example, consider the test case: | |
2396 | ||
2397 | static int i; | |
2398 | main () { int j; } | |
2399 | ||
2400 | for which the relevant DWARF segment has the structure: | |
2401 | ||
2402 | 0x51: | |
2403 | 0x23 global subrtn sibling 0x9b | |
2404 | name main | |
2405 | fund_type FT_integer | |
2406 | low_pc 0x800004cc | |
2407 | high_pc 0x800004d4 | |
2408 | ||
2409 | 0x74: | |
2410 | 0x23 local var sibling 0x97 | |
2411 | name j | |
2412 | fund_type FT_integer | |
2413 | location OP_BASEREG 0xe | |
2414 | OP_CONST 0xfffffffc | |
2415 | OP_ADD | |
2416 | 0x97: | |
2417 | 0x4 | |
2418 | ||
2419 | 0x9b: | |
2420 | 0x1d local var sibling 0xb8 | |
2421 | name i | |
2422 | fund_type FT_integer | |
2423 | location OP_ADDR 0x800025dc | |
2424 | ||
2425 | 0xb8: | |
2426 | 0x4 | |
2427 | ||
2428 | We want to include the symbol 'i' in the partial symbol table, but | |
2429 | not the symbol 'j'. In essence, we want to skip all the dies within | |
2430 | the scope of a TAG_global_subroutine DIE. | |
2431 | ||
715cafcb FF |
2432 | Don't attempt to add anonymous structures or unions since they have |
2433 | no name. Anonymous enumerations however are processed, because we | |
2434 | want to extract their member names (the check for a tag name is | |
2435 | done later). | |
2d6186f4 | 2436 | |
715cafcb FF |
2437 | Also, for variables and subroutines, check that this is the place |
2438 | where the actual definition occurs, rather than just a reference | |
2439 | to an external. | |
35f5886e FF |
2440 | */ |
2441 | ||
2442 | static void | |
1ab3bf1b JG |
2443 | scan_partial_symbols (thisdie, enddie, objfile) |
2444 | char *thisdie; | |
2445 | char *enddie; | |
2446 | struct objfile *objfile; | |
35f5886e FF |
2447 | { |
2448 | char *nextdie; | |
a679650f | 2449 | char *temp; |
35f5886e FF |
2450 | struct dieinfo di; |
2451 | ||
2452 | while (thisdie < enddie) | |
2453 | { | |
95967e73 | 2454 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2455 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2456 | { |
2457 | break; | |
2458 | } | |
2459 | else | |
2460 | { | |
13b5a7ff | 2461 | nextdie = thisdie + di.die_length; |
715cafcb FF |
2462 | /* To avoid getting complete die information for every die, we |
2463 | only do it (below) for the cases we are interested in. */ | |
13b5a7ff | 2464 | switch (di.die_tag) |
35f5886e FF |
2465 | { |
2466 | case TAG_global_subroutine: | |
35f5886e | 2467 | case TAG_subroutine: |
a679650f FF |
2468 | completedieinfo (&di, objfile); |
2469 | if (di.at_name && (di.has_at_low_pc || di.at_location)) | |
2470 | { | |
2471 | add_partial_symbol (&di, objfile); | |
2472 | /* If there is a sibling attribute, adjust the nextdie | |
2473 | pointer to skip the entire scope of the subroutine. | |
2474 | Apply some sanity checking to make sure we don't | |
2475 | overrun or underrun the range of remaining DIE's */ | |
2476 | if (di.at_sibling != 0) | |
2477 | { | |
2478 | temp = dbbase + di.at_sibling - dbroff; | |
2479 | if ((temp < thisdie) || (temp >= enddie)) | |
2480 | { | |
2481 | dwarfwarn ("reference to DIE (0x%x) outside compilation unit", di.at_sibling); | |
2482 | } | |
2483 | else | |
2484 | { | |
2485 | nextdie = temp; | |
2486 | } | |
2487 | } | |
2488 | } | |
2489 | break; | |
2d6186f4 | 2490 | case TAG_global_variable: |
35f5886e | 2491 | case TAG_local_variable: |
95967e73 | 2492 | completedieinfo (&di, objfile); |
2d6186f4 FF |
2493 | if (di.at_name && (di.has_at_low_pc || di.at_location)) |
2494 | { | |
1ab3bf1b | 2495 | add_partial_symbol (&di, objfile); |
2d6186f4 FF |
2496 | } |
2497 | break; | |
35f5886e FF |
2498 | case TAG_typedef: |
2499 | case TAG_structure_type: | |
2500 | case TAG_union_type: | |
95967e73 | 2501 | completedieinfo (&di, objfile); |
2d6186f4 | 2502 | if (di.at_name) |
35f5886e | 2503 | { |
1ab3bf1b | 2504 | add_partial_symbol (&di, objfile); |
35f5886e FF |
2505 | } |
2506 | break; | |
715cafcb | 2507 | case TAG_enumeration_type: |
95967e73 | 2508 | completedieinfo (&di, objfile); |
1ab3bf1b | 2509 | add_partial_symbol (&di, objfile); |
715cafcb | 2510 | break; |
35f5886e FF |
2511 | } |
2512 | } | |
2513 | thisdie = nextdie; | |
2514 | } | |
2515 | } | |
2516 | ||
2517 | /* | |
2518 | ||
2519 | LOCAL FUNCTION | |
2520 | ||
2521 | scan_compilation_units -- build a psymtab entry for each compilation | |
2522 | ||
2523 | DESCRIPTION | |
2524 | ||
2525 | This is the top level dwarf parsing routine for building partial | |
2526 | symbol tables. | |
2527 | ||
2528 | It scans from the beginning of the DWARF table looking for the first | |
2529 | TAG_compile_unit DIE, and then follows the sibling chain to locate | |
2530 | each additional TAG_compile_unit DIE. | |
2531 | ||
2532 | For each TAG_compile_unit DIE it creates a partial symtab structure, | |
2533 | calls a subordinate routine to collect all the compilation unit's | |
2534 | global DIE's, file scope DIEs, typedef DIEs, etc, and then links the | |
2535 | new partial symtab structure into the partial symbol table. It also | |
2536 | records the appropriate information in the partial symbol table entry | |
2537 | to allow the chunk of DIE's and line number table for this compilation | |
2538 | unit to be located and re-read later, to generate a complete symbol | |
2539 | table entry for the compilation unit. | |
2540 | ||
2541 | Thus it effectively partitions up a chunk of DIE's for multiple | |
2542 | compilation units into smaller DIE chunks and line number tables, | |
2543 | and associates them with a partial symbol table entry. | |
2544 | ||
2545 | NOTES | |
2546 | ||
2547 | If any compilation unit has no line number table associated with | |
2548 | it for some reason (a missing at_stmt_list attribute, rather than | |
2549 | just one with a value of zero, which is valid) then we ensure that | |
2550 | the recorded file offset is zero so that the routine which later | |
2551 | reads line number table fragments knows that there is no fragment | |
2552 | to read. | |
2553 | ||
2554 | RETURNS | |
2555 | ||
2556 | Returns no value. | |
2557 | ||
2558 | */ | |
2559 | ||
2560 | static void | |
1ab3bf1b JG |
2561 | scan_compilation_units (filename, thisdie, enddie, dbfoff, lnoffset, objfile) |
2562 | char *filename; | |
2563 | char *thisdie; | |
2564 | char *enddie; | |
2565 | unsigned int dbfoff; | |
2566 | unsigned int lnoffset; | |
2567 | struct objfile *objfile; | |
35f5886e FF |
2568 | { |
2569 | char *nextdie; | |
2570 | struct dieinfo di; | |
2571 | struct partial_symtab *pst; | |
2572 | int culength; | |
2573 | int curoff; | |
2574 | int curlnoffset; | |
2575 | ||
2576 | while (thisdie < enddie) | |
2577 | { | |
95967e73 | 2578 | basicdieinfo (&di, thisdie, objfile); |
13b5a7ff | 2579 | if (di.die_length < SIZEOF_DIE_LENGTH) |
35f5886e FF |
2580 | { |
2581 | break; | |
2582 | } | |
13b5a7ff | 2583 | else if (di.die_tag != TAG_compile_unit) |
35f5886e | 2584 | { |
13b5a7ff | 2585 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2586 | } |
2587 | else | |
2588 | { | |
95967e73 | 2589 | completedieinfo (&di, objfile); |
35f5886e FF |
2590 | if (di.at_sibling != 0) |
2591 | { | |
2592 | nextdie = dbbase + di.at_sibling - dbroff; | |
2593 | } | |
2594 | else | |
2595 | { | |
13b5a7ff | 2596 | nextdie = thisdie + di.die_length; |
35f5886e FF |
2597 | } |
2598 | curoff = thisdie - dbbase; | |
2599 | culength = nextdie - thisdie; | |
2d6186f4 | 2600 | curlnoffset = di.has_at_stmt_list ? lnoffset + di.at_stmt_list : 0; |
1ab3bf1b JG |
2601 | |
2602 | /* First allocate a new partial symbol table structure */ | |
2603 | ||
2670f34d | 2604 | pst = start_psymtab_common (objfile, base_section_offsets, di.at_name, |
1ab3bf1b JG |
2605 | di.at_low_pc, |
2606 | objfile -> global_psymbols.next, | |
2607 | objfile -> static_psymbols.next); | |
2608 | ||
2609 | pst -> texthigh = di.at_high_pc; | |
2610 | pst -> read_symtab_private = (char *) | |
2611 | obstack_alloc (&objfile -> psymbol_obstack, | |
2612 | sizeof (struct dwfinfo)); | |
2613 | DBFOFF (pst) = dbfoff; | |
2614 | DBROFF (pst) = curoff; | |
2615 | DBLENGTH (pst) = culength; | |
2616 | LNFOFF (pst) = curlnoffset; | |
2617 | pst -> read_symtab = dwarf_psymtab_to_symtab; | |
2618 | ||
2619 | /* Now look for partial symbols */ | |
2620 | ||
13b5a7ff | 2621 | scan_partial_symbols (thisdie + di.die_length, nextdie, objfile); |
1ab3bf1b JG |
2622 | |
2623 | pst -> n_global_syms = objfile -> global_psymbols.next - | |
2624 | (objfile -> global_psymbols.list + pst -> globals_offset); | |
2625 | pst -> n_static_syms = objfile -> static_psymbols.next - | |
2626 | (objfile -> static_psymbols.list + pst -> statics_offset); | |
2627 | sort_pst_symbols (pst); | |
35f5886e FF |
2628 | /* If there is already a psymtab or symtab for a file of this name, |
2629 | remove it. (If there is a symtab, more drastic things also | |
2630 | happen.) This happens in VxWorks. */ | |
2631 | free_named_symtabs (pst -> filename); | |
35f5886e FF |
2632 | } |
2633 | thisdie = nextdie; | |
2634 | } | |
2635 | } | |
2636 | ||
2637 | /* | |
2638 | ||
2639 | LOCAL FUNCTION | |
2640 | ||
2641 | new_symbol -- make a symbol table entry for a new symbol | |
2642 | ||
2643 | SYNOPSIS | |
2644 | ||
1ab3bf1b JG |
2645 | static struct symbol *new_symbol (struct dieinfo *dip, |
2646 | struct objfile *objfile) | |
35f5886e FF |
2647 | |
2648 | DESCRIPTION | |
2649 | ||
2650 | Given a pointer to a DWARF information entry, figure out if we need | |
2651 | to make a symbol table entry for it, and if so, create a new entry | |
2652 | and return a pointer to it. | |
2653 | */ | |
2654 | ||
2655 | static struct symbol * | |
1ab3bf1b JG |
2656 | new_symbol (dip, objfile) |
2657 | struct dieinfo *dip; | |
2658 | struct objfile *objfile; | |
35f5886e FF |
2659 | { |
2660 | struct symbol *sym = NULL; | |
2661 | ||
2662 | if (dip -> at_name != NULL) | |
2663 | { | |
1ab3bf1b | 2664 | sym = (struct symbol *) obstack_alloc (&objfile -> symbol_obstack, |
35f5886e | 2665 | sizeof (struct symbol)); |
4ed3a9ea | 2666 | memset (sym, 0, sizeof (struct symbol)); |
1ab3bf1b | 2667 | SYMBOL_NAME (sym) = create_name (dip -> at_name, &objfile->symbol_obstack); |
35f5886e FF |
2668 | /* default assumptions */ |
2669 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
2670 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2671 | SYMBOL_TYPE (sym) = decode_die_type (dip); | |
13b5a7ff | 2672 | switch (dip -> die_tag) |
35f5886e FF |
2673 | { |
2674 | case TAG_label: | |
4d315a07 | 2675 | SYMBOL_VALUE (sym) = dip -> at_low_pc; |
35f5886e FF |
2676 | SYMBOL_CLASS (sym) = LOC_LABEL; |
2677 | break; | |
2678 | case TAG_global_subroutine: | |
2679 | case TAG_subroutine: | |
4d315a07 | 2680 | SYMBOL_VALUE (sym) = dip -> at_low_pc; |
35f5886e FF |
2681 | SYMBOL_TYPE (sym) = lookup_function_type (SYMBOL_TYPE (sym)); |
2682 | SYMBOL_CLASS (sym) = LOC_BLOCK; | |
13b5a7ff | 2683 | if (dip -> die_tag == TAG_global_subroutine) |
35f5886e FF |
2684 | { |
2685 | add_symbol_to_list (sym, &global_symbols); | |
2686 | } | |
2687 | else | |
2688 | { | |
4d315a07 | 2689 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2690 | } |
2691 | break; | |
2692 | case TAG_global_variable: | |
35f5886e FF |
2693 | if (dip -> at_location != NULL) |
2694 | { | |
2695 | SYMBOL_VALUE (sym) = locval (dip -> at_location); | |
35f5886e FF |
2696 | add_symbol_to_list (sym, &global_symbols); |
2697 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2698 | SYMBOL_VALUE (sym) += baseaddr; | |
2699 | } | |
a5bd5ba6 FF |
2700 | break; |
2701 | case TAG_local_variable: | |
2702 | if (dip -> at_location != NULL) | |
35f5886e | 2703 | { |
a5bd5ba6 | 2704 | SYMBOL_VALUE (sym) = locval (dip -> at_location); |
4d315a07 | 2705 | add_symbol_to_list (sym, list_in_scope); |
a5bd5ba6 FF |
2706 | if (isreg) |
2707 | { | |
2708 | SYMBOL_CLASS (sym) = LOC_REGISTER; | |
2709 | } | |
2710 | else if (offreg) | |
35f5886e | 2711 | { |
a5bd5ba6 | 2712 | SYMBOL_CLASS (sym) = LOC_LOCAL; |
35f5886e FF |
2713 | } |
2714 | else | |
2715 | { | |
2716 | SYMBOL_CLASS (sym) = LOC_STATIC; | |
2717 | SYMBOL_VALUE (sym) += baseaddr; | |
2718 | } | |
2719 | } | |
2720 | break; | |
2721 | case TAG_formal_parameter: | |
2722 | if (dip -> at_location != NULL) | |
2723 | { | |
2724 | SYMBOL_VALUE (sym) = locval (dip -> at_location); | |
2725 | } | |
4d315a07 | 2726 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2727 | if (isreg) |
2728 | { | |
2729 | SYMBOL_CLASS (sym) = LOC_REGPARM; | |
2730 | } | |
2731 | else | |
2732 | { | |
2733 | SYMBOL_CLASS (sym) = LOC_ARG; | |
2734 | } | |
2735 | break; | |
2736 | case TAG_unspecified_parameters: | |
2737 | /* From varargs functions; gdb doesn't seem to have any interest in | |
2738 | this information, so just ignore it for now. (FIXME?) */ | |
2739 | break; | |
2740 | case TAG_structure_type: | |
2741 | case TAG_union_type: | |
2742 | case TAG_enumeration_type: | |
2743 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
2744 | SYMBOL_NAMESPACE (sym) = STRUCT_NAMESPACE; | |
4d315a07 | 2745 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2746 | break; |
2747 | case TAG_typedef: | |
2748 | SYMBOL_CLASS (sym) = LOC_TYPEDEF; | |
2749 | SYMBOL_NAMESPACE (sym) = VAR_NAMESPACE; | |
4d315a07 | 2750 | add_symbol_to_list (sym, list_in_scope); |
35f5886e FF |
2751 | break; |
2752 | default: | |
2753 | /* Not a tag we recognize. Hopefully we aren't processing trash | |
2754 | data, but since we must specifically ignore things we don't | |
2755 | recognize, there is nothing else we should do at this point. */ | |
2756 | break; | |
2757 | } | |
2758 | } | |
2759 | return (sym); | |
2760 | } | |
2761 | ||
2762 | /* | |
2763 | ||
2764 | LOCAL FUNCTION | |
2765 | ||
2766 | decode_mod_fund_type -- decode a modified fundamental type | |
2767 | ||
2768 | SYNOPSIS | |
2769 | ||
2770 | static struct type *decode_mod_fund_type (char *typedata) | |
2771 | ||
2772 | DESCRIPTION | |
2773 | ||
2774 | Decode a block of data containing a modified fundamental | |
2775 | type specification. TYPEDATA is a pointer to the block, | |
13b5a7ff FF |
2776 | which starts with a length containing the size of the rest |
2777 | of the block. At the end of the block is a fundmental type | |
2778 | code value that gives the fundamental type. Everything | |
35f5886e FF |
2779 | in between are type modifiers. |
2780 | ||
2781 | We simply compute the number of modifiers and call the general | |
2782 | function decode_modified_type to do the actual work. | |
2783 | */ | |
2784 | ||
2785 | static struct type * | |
1ab3bf1b JG |
2786 | decode_mod_fund_type (typedata) |
2787 | char *typedata; | |
35f5886e FF |
2788 | { |
2789 | struct type *typep = NULL; | |
2790 | unsigned short modcount; | |
13b5a7ff | 2791 | int nbytes; |
35f5886e FF |
2792 | |
2793 | /* Get the total size of the block, exclusive of the size itself */ | |
13b5a7ff FF |
2794 | |
2795 | nbytes = attribute_size (AT_mod_fund_type); | |
2796 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
2797 | typedata += nbytes; | |
2798 | ||
35f5886e | 2799 | /* Deduct the size of the fundamental type bytes at the end of the block. */ |
13b5a7ff FF |
2800 | |
2801 | modcount -= attribute_size (AT_fund_type); | |
2802 | ||
35f5886e | 2803 | /* Now do the actual decoding */ |
13b5a7ff FF |
2804 | |
2805 | typep = decode_modified_type (typedata, modcount, AT_mod_fund_type); | |
35f5886e FF |
2806 | return (typep); |
2807 | } | |
2808 | ||
2809 | /* | |
2810 | ||
2811 | LOCAL FUNCTION | |
2812 | ||
2813 | decode_mod_u_d_type -- decode a modified user defined type | |
2814 | ||
2815 | SYNOPSIS | |
2816 | ||
2817 | static struct type *decode_mod_u_d_type (char *typedata) | |
2818 | ||
2819 | DESCRIPTION | |
2820 | ||
2821 | Decode a block of data containing a modified user defined | |
2822 | type specification. TYPEDATA is a pointer to the block, | |
2823 | which consists of a two byte length, containing the size | |
2824 | of the rest of the block. At the end of the block is a | |
2825 | four byte value that gives a reference to a user defined type. | |
2826 | Everything in between are type modifiers. | |
2827 | ||
2828 | We simply compute the number of modifiers and call the general | |
2829 | function decode_modified_type to do the actual work. | |
2830 | */ | |
2831 | ||
2832 | static struct type * | |
1ab3bf1b JG |
2833 | decode_mod_u_d_type (typedata) |
2834 | char *typedata; | |
35f5886e FF |
2835 | { |
2836 | struct type *typep = NULL; | |
2837 | unsigned short modcount; | |
13b5a7ff | 2838 | int nbytes; |
35f5886e FF |
2839 | |
2840 | /* Get the total size of the block, exclusive of the size itself */ | |
13b5a7ff FF |
2841 | |
2842 | nbytes = attribute_size (AT_mod_u_d_type); | |
2843 | modcount = target_to_host (typedata, nbytes, GET_UNSIGNED, current_objfile); | |
2844 | typedata += nbytes; | |
2845 | ||
35f5886e | 2846 | /* Deduct the size of the reference type bytes at the end of the block. */ |
13b5a7ff FF |
2847 | |
2848 | modcount -= attribute_size (AT_user_def_type); | |
2849 | ||
35f5886e | 2850 | /* Now do the actual decoding */ |
13b5a7ff FF |
2851 | |
2852 | typep = decode_modified_type (typedata, modcount, AT_mod_u_d_type); | |
35f5886e FF |
2853 | return (typep); |
2854 | } | |
2855 | ||
2856 | /* | |
2857 | ||
2858 | LOCAL FUNCTION | |
2859 | ||
2860 | decode_modified_type -- decode modified user or fundamental type | |
2861 | ||
2862 | SYNOPSIS | |
2863 | ||
1c92ca6f | 2864 | static struct type *decode_modified_type (char *modifiers, |
35f5886e FF |
2865 | unsigned short modcount, int mtype) |
2866 | ||
2867 | DESCRIPTION | |
2868 | ||
2869 | Decode a modified type, either a modified fundamental type or | |
2870 | a modified user defined type. MODIFIERS is a pointer to the | |
2871 | block of bytes that define MODCOUNT modifiers. Immediately | |
2872 | following the last modifier is a short containing the fundamental | |
2873 | type or a long containing the reference to the user defined | |
2874 | type. Which one is determined by MTYPE, which is either | |
2875 | AT_mod_fund_type or AT_mod_u_d_type to indicate what modified | |
2876 | type we are generating. | |
2877 | ||
2878 | We call ourself recursively to generate each modified type,` | |
2879 | until MODCOUNT reaches zero, at which point we have consumed | |
2880 | all the modifiers and generate either the fundamental type or | |
2881 | user defined type. When the recursion unwinds, each modifier | |
2882 | is applied in turn to generate the full modified type. | |
2883 | ||
2884 | NOTES | |
2885 | ||
2886 | If we find a modifier that we don't recognize, and it is not one | |
2887 | of those reserved for application specific use, then we issue a | |
2888 | warning and simply ignore the modifier. | |
2889 | ||
2890 | BUGS | |
2891 | ||
2892 | We currently ignore MOD_const and MOD_volatile. (FIXME) | |
2893 | ||
2894 | */ | |
2895 | ||
2896 | static struct type * | |
1ab3bf1b | 2897 | decode_modified_type (modifiers, modcount, mtype) |
1c92ca6f | 2898 | char *modifiers; |
1ab3bf1b JG |
2899 | unsigned int modcount; |
2900 | int mtype; | |
35f5886e FF |
2901 | { |
2902 | struct type *typep = NULL; | |
2903 | unsigned short fundtype; | |
13b5a7ff | 2904 | DIE_REF die_ref; |
1c92ca6f | 2905 | char modifier; |
13b5a7ff | 2906 | int nbytes; |
35f5886e FF |
2907 | |
2908 | if (modcount == 0) | |
2909 | { | |
2910 | switch (mtype) | |
2911 | { | |
2912 | case AT_mod_fund_type: | |
13b5a7ff FF |
2913 | nbytes = attribute_size (AT_fund_type); |
2914 | fundtype = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
2915 | current_objfile); | |
35f5886e FF |
2916 | typep = decode_fund_type (fundtype); |
2917 | break; | |
2918 | case AT_mod_u_d_type: | |
13b5a7ff FF |
2919 | nbytes = attribute_size (AT_user_def_type); |
2920 | die_ref = target_to_host (modifiers, nbytes, GET_UNSIGNED, | |
2921 | current_objfile); | |
2922 | if ((typep = lookup_utype (die_ref)) == NULL) | |
35f5886e | 2923 | { |
13b5a7ff | 2924 | typep = alloc_utype (die_ref, NULL); |
35f5886e FF |
2925 | } |
2926 | break; | |
2927 | default: | |
2928 | SQUAWK (("botched modified type decoding (mtype 0x%x)", mtype)); | |
1ab3bf1b | 2929 | typep = lookup_fundamental_type (current_objfile, FT_INTEGER); |
35f5886e FF |
2930 | break; |
2931 | } | |
2932 | } | |
2933 | else | |
2934 | { | |
2935 | modifier = *modifiers++; | |
2936 | typep = decode_modified_type (modifiers, --modcount, mtype); | |
2937 | switch (modifier) | |
2938 | { | |
13b5a7ff FF |
2939 | case MOD_pointer_to: |
2940 | typep = lookup_pointer_type (typep); | |
2941 | break; | |
2942 | case MOD_reference_to: | |
2943 | typep = lookup_reference_type (typep); | |
2944 | break; | |
2945 | case MOD_const: | |
2946 | SQUAWK (("type modifier 'const' ignored")); /* FIXME */ | |
2947 | break; | |
2948 | case MOD_volatile: | |
2949 | SQUAWK (("type modifier 'volatile' ignored")); /* FIXME */ | |
2950 | break; | |
2951 | default: | |
1c92ca6f FF |
2952 | if (!(MOD_lo_user <= (unsigned char) modifier |
2953 | && (unsigned char) modifier <= MOD_hi_user)) | |
13b5a7ff | 2954 | { |
1c92ca6f FF |
2955 | SQUAWK (("unknown type modifier %u", |
2956 | (unsigned char) modifier)); | |
13b5a7ff FF |
2957 | } |
2958 | break; | |
35f5886e FF |
2959 | } |
2960 | } | |
2961 | return (typep); | |
2962 | } | |
2963 | ||
2964 | /* | |
2965 | ||
2966 | LOCAL FUNCTION | |
2967 | ||
2968 | decode_fund_type -- translate basic DWARF type to gdb base type | |
2969 | ||
2970 | DESCRIPTION | |
2971 | ||
2972 | Given an integer that is one of the fundamental DWARF types, | |
2973 | translate it to one of the basic internal gdb types and return | |
2974 | a pointer to the appropriate gdb type (a "struct type *"). | |
2975 | ||
2976 | NOTES | |
2977 | ||
2978 | If we encounter a fundamental type that we are unprepared to | |
2979 | deal with, and it is not in the range of those types defined | |
2980 | as application specific types, then we issue a warning and | |
1ab3bf1b | 2981 | treat the type as an "int". |
35f5886e FF |
2982 | */ |
2983 | ||
2984 | static struct type * | |
1ab3bf1b JG |
2985 | decode_fund_type (fundtype) |
2986 | unsigned int fundtype; | |
35f5886e FF |
2987 | { |
2988 | struct type *typep = NULL; | |
2989 | ||
2990 | switch (fundtype) | |
2991 | { | |
2992 | ||
2993 | case FT_void: | |
1ab3bf1b | 2994 | typep = lookup_fundamental_type (current_objfile, FT_VOID); |
35f5886e FF |
2995 | break; |
2996 | ||
1ab3bf1b JG |
2997 | case FT_boolean: /* Was FT_set in AT&T version */ |
2998 | typep = lookup_fundamental_type (current_objfile, FT_BOOLEAN); | |
2999 | break; | |
3000 | ||
35f5886e | 3001 | case FT_pointer: /* (void *) */ |
1ab3bf1b JG |
3002 | typep = lookup_fundamental_type (current_objfile, FT_VOID); |
3003 | typep = lookup_pointer_type (typep); | |
35f5886e FF |
3004 | break; |
3005 | ||
3006 | case FT_char: | |
1ab3bf1b JG |
3007 | typep = lookup_fundamental_type (current_objfile, FT_CHAR); |
3008 | break; | |
3009 | ||
35f5886e | 3010 | case FT_signed_char: |
1ab3bf1b JG |
3011 | typep = lookup_fundamental_type (current_objfile, FT_SIGNED_CHAR); |
3012 | break; | |
3013 | ||
3014 | case FT_unsigned_char: | |
3015 | typep = lookup_fundamental_type (current_objfile, FT_UNSIGNED_CHAR); | |
35f5886e FF |
3016 | break; |
3017 | ||
3018 | case FT_short: | |
1ab3bf1b JG |
3019 | typep = lookup_fundamental_type (current_objfile, FT_SHORT); |
3020 | break; | |
3021 | ||
35f5886e | 3022 | case FT_signed_short: |
1ab3bf1b JG |
3023 | typep = lookup_fundamental_type (current_objfile, FT_SIGNED_SHORT); |
3024 | break; | |
3025 | ||
3026 | case FT_unsigned_short: | |
3027 | typep = lookup_fundamental_type (current_objfile, FT_UNSIGNED_SHORT); | |
35f5886e FF |
3028 | break; |
3029 | ||
3030 | case FT_integer: | |
1ab3bf1b JG |
3031 | typep = lookup_fundamental_type (current_objfile, FT_INTEGER); |
3032 | break; | |
3033 | ||
35f5886e | 3034 | case FT_signed_integer: |
1ab3bf1b JG |
3035 | typep = lookup_fundamental_type (current_objfile, FT_SIGNED_INTEGER); |
3036 | break; | |
3037 | ||
3038 | case FT_unsigned_integer: | |
3039 | typep = lookup_fundamental_type (current_objfile, FT_UNSIGNED_INTEGER); | |
35f5886e FF |
3040 | break; |
3041 | ||
3042 | case FT_long: | |
1ab3bf1b JG |
3043 | typep = lookup_fundamental_type (current_objfile, FT_LONG); |
3044 | break; | |
3045 | ||
35f5886e | 3046 | case FT_signed_long: |
1ab3bf1b | 3047 | typep = lookup_fundamental_type (current_objfile, FT_SIGNED_LONG); |
35f5886e FF |
3048 | break; |
3049 | ||
1ab3bf1b JG |
3050 | case FT_unsigned_long: |
3051 | typep = lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG); | |
35f5886e FF |
3052 | break; |
3053 | ||
1ab3bf1b JG |
3054 | case FT_long_long: |
3055 | typep = lookup_fundamental_type (current_objfile, FT_LONG_LONG); | |
35f5886e | 3056 | break; |
1ab3bf1b JG |
3057 | |
3058 | case FT_signed_long_long: | |
3059 | typep = lookup_fundamental_type (current_objfile, FT_SIGNED_LONG_LONG); | |
35f5886e | 3060 | break; |
1ab3bf1b JG |
3061 | |
3062 | case FT_unsigned_long_long: | |
3063 | typep = lookup_fundamental_type (current_objfile, FT_UNSIGNED_LONG_LONG); | |
35f5886e | 3064 | break; |
1ab3bf1b JG |
3065 | |
3066 | case FT_float: | |
3067 | typep = lookup_fundamental_type (current_objfile, FT_FLOAT); | |
35f5886e FF |
3068 | break; |
3069 | ||
1ab3bf1b JG |
3070 | case FT_dbl_prec_float: |
3071 | typep = lookup_fundamental_type (current_objfile, FT_DBL_PREC_FLOAT); | |
35f5886e FF |
3072 | break; |
3073 | ||
3074 | case FT_ext_prec_float: | |
1ab3bf1b | 3075 | typep = lookup_fundamental_type (current_objfile, FT_EXT_PREC_FLOAT); |
35f5886e FF |
3076 | break; |
3077 | ||
3078 | case FT_complex: | |
1ab3bf1b | 3079 | typep = lookup_fundamental_type (current_objfile, FT_COMPLEX); |
35f5886e FF |
3080 | break; |
3081 | ||
3082 | case FT_dbl_prec_complex: | |
1ab3bf1b | 3083 | typep = lookup_fundamental_type (current_objfile, FT_DBL_PREC_COMPLEX); |
35f5886e FF |
3084 | break; |
3085 | ||
1ab3bf1b JG |
3086 | case FT_ext_prec_complex: |
3087 | typep = lookup_fundamental_type (current_objfile, FT_EXT_PREC_COMPLEX); | |
35f5886e | 3088 | break; |
1ab3bf1b | 3089 | |
35f5886e FF |
3090 | } |
3091 | ||
3092 | if ((typep == NULL) && !(FT_lo_user <= fundtype && fundtype <= FT_hi_user)) | |
3093 | { | |
3094 | SQUAWK (("unexpected fundamental type 0x%x", fundtype)); | |
1ab3bf1b | 3095 | typep = lookup_fundamental_type (current_objfile, FT_VOID); |
35f5886e FF |
3096 | } |
3097 | ||
3098 | return (typep); | |
3099 | } | |
3100 | ||
3101 | /* | |
3102 | ||
3103 | LOCAL FUNCTION | |
3104 | ||
3105 | create_name -- allocate a fresh copy of a string on an obstack | |
3106 | ||
3107 | DESCRIPTION | |
3108 | ||
3109 | Given a pointer to a string and a pointer to an obstack, allocates | |
3110 | a fresh copy of the string on the specified obstack. | |
3111 | ||
3112 | */ | |
3113 | ||
3114 | static char * | |
1ab3bf1b JG |
3115 | create_name (name, obstackp) |
3116 | char *name; | |
3117 | struct obstack *obstackp; | |
35f5886e FF |
3118 | { |
3119 | int length; | |
3120 | char *newname; | |
3121 | ||
3122 | length = strlen (name) + 1; | |
3123 | newname = (char *) obstack_alloc (obstackp, length); | |
4ed3a9ea | 3124 | strcpy (newname, name); |
35f5886e FF |
3125 | return (newname); |
3126 | } | |
3127 | ||
3128 | /* | |
3129 | ||
3130 | LOCAL FUNCTION | |
3131 | ||
3132 | basicdieinfo -- extract the minimal die info from raw die data | |
3133 | ||
3134 | SYNOPSIS | |
3135 | ||
95967e73 FF |
3136 | void basicdieinfo (char *diep, struct dieinfo *dip, |
3137 | struct objfile *objfile) | |
35f5886e FF |
3138 | |
3139 | DESCRIPTION | |
3140 | ||
3141 | Given a pointer to raw DIE data, and a pointer to an instance of a | |
3142 | die info structure, this function extracts the basic information | |
3143 | from the DIE data required to continue processing this DIE, along | |
3144 | with some bookkeeping information about the DIE. | |
3145 | ||
3146 | The information we absolutely must have includes the DIE tag, | |
3147 | and the DIE length. If we need the sibling reference, then we | |
3148 | will have to call completedieinfo() to process all the remaining | |
3149 | DIE information. | |
3150 | ||
3151 | Note that since there is no guarantee that the data is properly | |
3152 | aligned in memory for the type of access required (indirection | |
95967e73 FF |
3153 | through anything other than a char pointer), and there is no |
3154 | guarantee that it is in the same byte order as the gdb host, | |
3155 | we call a function which deals with both alignment and byte | |
3156 | swapping issues. Possibly inefficient, but quite portable. | |
35f5886e FF |
3157 | |
3158 | We also take care of some other basic things at this point, such | |
3159 | as ensuring that the instance of the die info structure starts | |
3160 | out completely zero'd and that curdie is initialized for use | |
3161 | in error reporting if we have a problem with the current die. | |
3162 | ||
3163 | NOTES | |
3164 | ||
3165 | All DIE's must have at least a valid length, thus the minimum | |
13b5a7ff FF |
3166 | DIE size is SIZEOF_DIE_LENGTH. In order to have a valid tag, the |
3167 | DIE size must be at least SIZEOF_DIE_TAG larger, otherwise they | |
35f5886e FF |
3168 | are forced to be TAG_padding DIES. |
3169 | ||
13b5a7ff FF |
3170 | Padding DIES must be at least SIZEOF_DIE_LENGTH in length, implying |
3171 | that if a padding DIE is used for alignment and the amount needed is | |
3172 | less than SIZEOF_DIE_LENGTH, then the padding DIE has to be big | |
3173 | enough to align to the next alignment boundry. | |
35f5886e FF |
3174 | */ |
3175 | ||
3176 | static void | |
95967e73 | 3177 | basicdieinfo (dip, diep, objfile) |
1ab3bf1b JG |
3178 | struct dieinfo *dip; |
3179 | char *diep; | |
95967e73 | 3180 | struct objfile *objfile; |
35f5886e FF |
3181 | { |
3182 | curdie = dip; | |
4ed3a9ea | 3183 | memset (dip, 0, sizeof (struct dieinfo)); |
35f5886e | 3184 | dip -> die = diep; |
13b5a7ff FF |
3185 | dip -> die_ref = dbroff + (diep - dbbase); |
3186 | dip -> die_length = target_to_host (diep, SIZEOF_DIE_LENGTH, GET_UNSIGNED, | |
3187 | objfile); | |
3188 | if (dip -> die_length < SIZEOF_DIE_LENGTH) | |
35f5886e | 3189 | { |
13b5a7ff | 3190 | dwarfwarn ("malformed DIE, bad length (%d bytes)", dip -> die_length); |
35f5886e | 3191 | } |
13b5a7ff | 3192 | else if (dip -> die_length < (SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG)) |
35f5886e | 3193 | { |
13b5a7ff | 3194 | dip -> die_tag = TAG_padding; |
35f5886e FF |
3195 | } |
3196 | else | |
3197 | { | |
13b5a7ff FF |
3198 | diep += SIZEOF_DIE_LENGTH; |
3199 | dip -> die_tag = target_to_host (diep, SIZEOF_DIE_TAG, GET_UNSIGNED, | |
3200 | objfile); | |
35f5886e FF |
3201 | } |
3202 | } | |
3203 | ||
3204 | /* | |
3205 | ||
3206 | LOCAL FUNCTION | |
3207 | ||
3208 | completedieinfo -- finish reading the information for a given DIE | |
3209 | ||
3210 | SYNOPSIS | |
3211 | ||
95967e73 | 3212 | void completedieinfo (struct dieinfo *dip, struct objfile *objfile) |
35f5886e FF |
3213 | |
3214 | DESCRIPTION | |
3215 | ||
3216 | Given a pointer to an already partially initialized die info structure, | |
3217 | scan the raw DIE data and finish filling in the die info structure | |
3218 | from the various attributes found. | |
3219 | ||
3220 | Note that since there is no guarantee that the data is properly | |
3221 | aligned in memory for the type of access required (indirection | |
95967e73 FF |
3222 | through anything other than a char pointer), and there is no |
3223 | guarantee that it is in the same byte order as the gdb host, | |
3224 | we call a function which deals with both alignment and byte | |
3225 | swapping issues. Possibly inefficient, but quite portable. | |
35f5886e FF |
3226 | |
3227 | NOTES | |
3228 | ||
3229 | Each time we are called, we increment the diecount variable, which | |
3230 | keeps an approximate count of the number of dies processed for | |
3231 | each compilation unit. This information is presented to the user | |
3232 | if the info_verbose flag is set. | |
3233 | ||
3234 | */ | |
3235 | ||
3236 | static void | |
95967e73 | 3237 | completedieinfo (dip, objfile) |
1ab3bf1b | 3238 | struct dieinfo *dip; |
95967e73 | 3239 | struct objfile *objfile; |
35f5886e FF |
3240 | { |
3241 | char *diep; /* Current pointer into raw DIE data */ | |
3242 | char *end; /* Terminate DIE scan here */ | |
3243 | unsigned short attr; /* Current attribute being scanned */ | |
3244 | unsigned short form; /* Form of the attribute */ | |
13b5a7ff | 3245 | int nbytes; /* Size of next field to read */ |
35f5886e FF |
3246 | |
3247 | diecount++; | |
3248 | diep = dip -> die; | |
13b5a7ff FF |
3249 | end = diep + dip -> die_length; |
3250 | diep += SIZEOF_DIE_LENGTH + SIZEOF_DIE_TAG; | |
35f5886e FF |
3251 | while (diep < end) |
3252 | { | |
13b5a7ff FF |
3253 | attr = target_to_host (diep, SIZEOF_ATTRIBUTE, GET_UNSIGNED, objfile); |
3254 | diep += SIZEOF_ATTRIBUTE; | |
3255 | if ((nbytes = attribute_size (attr)) == -1) | |
3256 | { | |
3257 | SQUAWK (("unknown attribute length, skipped remaining attributes"));; | |
3258 | diep = end; | |
3259 | continue; | |
3260 | } | |
35f5886e FF |
3261 | switch (attr) |
3262 | { | |
3263 | case AT_fund_type: | |
13b5a7ff FF |
3264 | dip -> at_fund_type = target_to_host (diep, nbytes, GET_UNSIGNED, |
3265 | objfile); | |
35f5886e FF |
3266 | break; |
3267 | case AT_ordering: | |
13b5a7ff FF |
3268 | dip -> at_ordering = target_to_host (diep, nbytes, GET_UNSIGNED, |
3269 | objfile); | |
35f5886e FF |
3270 | break; |
3271 | case AT_bit_offset: | |
13b5a7ff FF |
3272 | dip -> at_bit_offset = target_to_host (diep, nbytes, GET_UNSIGNED, |
3273 | objfile); | |
35f5886e | 3274 | break; |
35f5886e | 3275 | case AT_sibling: |
13b5a7ff FF |
3276 | dip -> at_sibling = target_to_host (diep, nbytes, GET_UNSIGNED, |
3277 | objfile); | |
35f5886e FF |
3278 | break; |
3279 | case AT_stmt_list: | |
13b5a7ff FF |
3280 | dip -> at_stmt_list = target_to_host (diep, nbytes, GET_UNSIGNED, |
3281 | objfile); | |
2d6186f4 | 3282 | dip -> has_at_stmt_list = 1; |
35f5886e FF |
3283 | break; |
3284 | case AT_low_pc: | |
13b5a7ff FF |
3285 | dip -> at_low_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3286 | objfile); | |
4d315a07 | 3287 | dip -> at_low_pc += baseaddr; |
2d6186f4 | 3288 | dip -> has_at_low_pc = 1; |
35f5886e FF |
3289 | break; |
3290 | case AT_high_pc: | |
13b5a7ff FF |
3291 | dip -> at_high_pc = target_to_host (diep, nbytes, GET_UNSIGNED, |
3292 | objfile); | |
4d315a07 | 3293 | dip -> at_high_pc += baseaddr; |
35f5886e FF |
3294 | break; |
3295 | case AT_language: | |
13b5a7ff FF |
3296 | dip -> at_language = target_to_host (diep, nbytes, GET_UNSIGNED, |
3297 | objfile); | |
35f5886e FF |
3298 | break; |
3299 | case AT_user_def_type: | |
13b5a7ff FF |
3300 | dip -> at_user_def_type = target_to_host (diep, nbytes, |
3301 | GET_UNSIGNED, objfile); | |
35f5886e FF |
3302 | break; |
3303 | case AT_byte_size: | |
13b5a7ff FF |
3304 | dip -> at_byte_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3305 | objfile); | |
50055e94 | 3306 | dip -> has_at_byte_size = 1; |
35f5886e FF |
3307 | break; |
3308 | case AT_bit_size: | |
13b5a7ff FF |
3309 | dip -> at_bit_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3310 | objfile); | |
35f5886e FF |
3311 | break; |
3312 | case AT_member: | |
13b5a7ff FF |
3313 | dip -> at_member = target_to_host (diep, nbytes, GET_UNSIGNED, |
3314 | objfile); | |
35f5886e FF |
3315 | break; |
3316 | case AT_discr: | |
13b5a7ff FF |
3317 | dip -> at_discr = target_to_host (diep, nbytes, GET_UNSIGNED, |
3318 | objfile); | |
35f5886e | 3319 | break; |
35f5886e FF |
3320 | case AT_location: |
3321 | dip -> at_location = diep; | |
3322 | break; | |
3323 | case AT_mod_fund_type: | |
3324 | dip -> at_mod_fund_type = diep; | |
3325 | break; | |
3326 | case AT_subscr_data: | |
3327 | dip -> at_subscr_data = diep; | |
3328 | break; | |
3329 | case AT_mod_u_d_type: | |
3330 | dip -> at_mod_u_d_type = diep; | |
3331 | break; | |
35f5886e FF |
3332 | case AT_element_list: |
3333 | dip -> at_element_list = diep; | |
768be6e1 FF |
3334 | dip -> short_element_list = 0; |
3335 | break; | |
3336 | case AT_short_element_list: | |
3337 | dip -> at_element_list = diep; | |
3338 | dip -> short_element_list = 1; | |
35f5886e FF |
3339 | break; |
3340 | case AT_discr_value: | |
3341 | dip -> at_discr_value = diep; | |
3342 | break; | |
3343 | case AT_string_length: | |
3344 | dip -> at_string_length = diep; | |
3345 | break; | |
3346 | case AT_name: | |
3347 | dip -> at_name = diep; | |
3348 | break; | |
3349 | case AT_comp_dir: | |
d4902ab0 FF |
3350 | /* For now, ignore any "hostname:" portion, since gdb doesn't |
3351 | know how to deal with it. (FIXME). */ | |
3352 | dip -> at_comp_dir = strrchr (diep, ':'); | |
3353 | if (dip -> at_comp_dir != NULL) | |
3354 | { | |
3355 | dip -> at_comp_dir++; | |
3356 | } | |
3357 | else | |
3358 | { | |
3359 | dip -> at_comp_dir = diep; | |
3360 | } | |
35f5886e FF |
3361 | break; |
3362 | case AT_producer: | |
3363 | dip -> at_producer = diep; | |
3364 | break; | |
35f5886e | 3365 | case AT_start_scope: |
13b5a7ff FF |
3366 | dip -> at_start_scope = target_to_host (diep, nbytes, GET_UNSIGNED, |
3367 | objfile); | |
35f5886e FF |
3368 | break; |
3369 | case AT_stride_size: | |
13b5a7ff FF |
3370 | dip -> at_stride_size = target_to_host (diep, nbytes, GET_UNSIGNED, |
3371 | objfile); | |
35f5886e FF |
3372 | break; |
3373 | case AT_src_info: | |
13b5a7ff FF |
3374 | dip -> at_src_info = target_to_host (diep, nbytes, GET_UNSIGNED, |
3375 | objfile); | |
35f5886e FF |
3376 | break; |
3377 | case AT_prototyped: | |
13b5a7ff | 3378 | dip -> at_prototyped = diep; |
35f5886e | 3379 | break; |
35f5886e FF |
3380 | default: |
3381 | /* Found an attribute that we are unprepared to handle. However | |
3382 | it is specifically one of the design goals of DWARF that | |
3383 | consumers should ignore unknown attributes. As long as the | |
3384 | form is one that we recognize (so we know how to skip it), | |
3385 | we can just ignore the unknown attribute. */ | |
3386 | break; | |
3387 | } | |
13b5a7ff | 3388 | form = FORM_FROM_ATTR (attr); |
35f5886e FF |
3389 | switch (form) |
3390 | { | |
3391 | case FORM_DATA2: | |
13b5a7ff | 3392 | diep += 2; |
35f5886e FF |
3393 | break; |
3394 | case FORM_DATA4: | |
13b5a7ff FF |
3395 | case FORM_REF: |
3396 | diep += 4; | |
35f5886e FF |
3397 | break; |
3398 | case FORM_DATA8: | |
13b5a7ff | 3399 | diep += 8; |
35f5886e FF |
3400 | break; |
3401 | case FORM_ADDR: | |
13b5a7ff | 3402 | diep += TARGET_FT_POINTER_SIZE (objfile); |
35f5886e FF |
3403 | break; |
3404 | case FORM_BLOCK2: | |
13b5a7ff | 3405 | diep += 2 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); |
35f5886e FF |
3406 | break; |
3407 | case FORM_BLOCK4: | |
13b5a7ff | 3408 | diep += 4 + target_to_host (diep, nbytes, GET_UNSIGNED, objfile); |
35f5886e FF |
3409 | break; |
3410 | case FORM_STRING: | |
3411 | diep += strlen (diep) + 1; | |
3412 | break; | |
3413 | default: | |
13b5a7ff FF |
3414 | SQUAWK (("unknown attribute form (0x%x)", form)); |
3415 | SQUAWK (("unknown attribute length, skipped remaining attributes"));; | |
35f5886e FF |
3416 | diep = end; |
3417 | break; | |
3418 | } | |
3419 | } | |
3420 | } | |
95967e73 | 3421 | |
13b5a7ff | 3422 | /* |
95967e73 | 3423 | |
13b5a7ff FF |
3424 | LOCAL FUNCTION |
3425 | ||
3426 | target_to_host -- swap in target data to host | |
3427 | ||
3428 | SYNOPSIS | |
3429 | ||
3430 | target_to_host (char *from, int nbytes, int signextend, | |
3431 | struct objfile *objfile) | |
3432 | ||
3433 | DESCRIPTION | |
3434 | ||
3435 | Given pointer to data in target format in FROM, a byte count for | |
3436 | the size of the data in NBYTES, a flag indicating whether or not | |
3437 | the data is signed in SIGNEXTEND, and a pointer to the current | |
3438 | objfile in OBJFILE, convert the data to host format and return | |
3439 | the converted value. | |
3440 | ||
3441 | NOTES | |
3442 | ||
3443 | FIXME: If we read data that is known to be signed, and expect to | |
3444 | use it as signed data, then we need to explicitly sign extend the | |
3445 | result until the bfd library is able to do this for us. | |
3446 | ||
3447 | */ | |
3448 | ||
3449 | static unsigned long | |
3450 | target_to_host (from, nbytes, signextend, objfile) | |
95967e73 FF |
3451 | char *from; |
3452 | int nbytes; | |
13b5a7ff | 3453 | int signextend; /* FIXME: Unused */ |
95967e73 FF |
3454 | struct objfile *objfile; |
3455 | { | |
13b5a7ff | 3456 | unsigned long rtnval; |
95967e73 FF |
3457 | |
3458 | switch (nbytes) | |
3459 | { | |
95967e73 | 3460 | case 8: |
13b5a7ff | 3461 | rtnval = bfd_get_64 (objfile -> obfd, (bfd_byte *) from); |
95967e73 | 3462 | break; |
95967e73 | 3463 | case 4: |
13b5a7ff | 3464 | rtnval = bfd_get_32 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3465 | break; |
3466 | case 2: | |
13b5a7ff | 3467 | rtnval = bfd_get_16 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3468 | break; |
3469 | case 1: | |
13b5a7ff | 3470 | rtnval = bfd_get_8 (objfile -> obfd, (bfd_byte *) from); |
95967e73 FF |
3471 | break; |
3472 | default: | |
13b5a7ff FF |
3473 | dwarfwarn ("no bfd support for %d byte data object", nbytes); |
3474 | rtnval = 0; | |
95967e73 FF |
3475 | break; |
3476 | } | |
13b5a7ff | 3477 | return (rtnval); |
95967e73 FF |
3478 | } |
3479 | ||
13b5a7ff FF |
3480 | /* |
3481 | ||
3482 | LOCAL FUNCTION | |
3483 | ||
3484 | attribute_size -- compute size of data for a DWARF attribute | |
3485 | ||
3486 | SYNOPSIS | |
3487 | ||
3488 | static int attribute_size (unsigned int attr) | |
3489 | ||
3490 | DESCRIPTION | |
3491 | ||
3492 | Given a DWARF attribute in ATTR, compute the size of the first | |
3493 | piece of data associated with this attribute and return that | |
3494 | size. | |
3495 | ||
3496 | Returns -1 for unrecognized attributes. | |
3497 | ||
3498 | */ | |
3499 | ||
3500 | static int | |
3501 | attribute_size (attr) | |
3502 | unsigned int attr; | |
3503 | { | |
3504 | int nbytes; /* Size of next data for this attribute */ | |
3505 | unsigned short form; /* Form of the attribute */ | |
3506 | ||
3507 | form = FORM_FROM_ATTR (attr); | |
3508 | switch (form) | |
3509 | { | |
3510 | case FORM_STRING: /* A variable length field is next */ | |
3511 | nbytes = 0; | |
3512 | break; | |
3513 | case FORM_DATA2: /* Next 2 byte field is the data itself */ | |
3514 | case FORM_BLOCK2: /* Next 2 byte field is a block length */ | |
3515 | nbytes = 2; | |
3516 | break; | |
3517 | case FORM_DATA4: /* Next 4 byte field is the data itself */ | |
3518 | case FORM_BLOCK4: /* Next 4 byte field is a block length */ | |
3519 | case FORM_REF: /* Next 4 byte field is a DIE offset */ | |
3520 | nbytes = 4; | |
3521 | break; | |
3522 | case FORM_DATA8: /* Next 8 byte field is the data itself */ | |
3523 | nbytes = 8; | |
3524 | break; | |
3525 | case FORM_ADDR: /* Next field size is target sizeof(void *) */ | |
3526 | nbytes = TARGET_FT_POINTER_SIZE (objfile); | |
3527 | break; | |
3528 | default: | |
3529 | SQUAWK (("unknown attribute form (0x%x)", form)); | |
3530 | nbytes = -1; | |
3531 | break; | |
3532 | } | |
3533 | return (nbytes); | |
3534 | } |