1 /* Read a symbol table in ECOFF format (Third-Eye).
3 Copyright (C) 1986-2020 Free Software Foundation, Inc.
5 Original version contributed by Alessandro Forin (af@cs.cmu.edu) at
6 CMU. Major work by Per Bothner, John Gilmore and Ian Lance Taylor
9 This file is part of GDB.
11 This program is free software; you can redistribute it and/or modify
12 it under the terms of the GNU General Public License as published by
13 the Free Software Foundation; either version 3 of the License, or
14 (at your option) any later version.
16 This program is distributed in the hope that it will be useful,
17 but WITHOUT ANY WARRANTY; without even the implied warranty of
18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 GNU General Public License for more details.
21 You should have received a copy of the GNU General Public License
22 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 /* This module provides the function mdebug_build_psymtabs. It reads
25 ECOFF debugging information into partial symbol tables. The
26 debugging information is read from two structures. A struct
27 ecoff_debug_swap includes the sizes of each ECOFF structure and
28 swapping routines; these are fixed for a particular target. A
29 struct ecoff_debug_info points to the debugging information for a
30 particular object file.
32 ECOFF symbol tables are mostly written in the byte order of the
33 target machine. However, one section of the table (the auxiliary
34 symbol information) is written in the host byte order. There is a
35 bit in the other symbol info which describes which host byte order
36 was used. ECOFF thereby takes the trophy from Intel `b.out' for
37 the most brain-dead adaptation of a file format to byte order.
39 This module can read all four of the known byte-order combinations,
40 on any type of host. */
46 #include "filenames.h"
48 #include "gdb_obstack.h"
49 #include "buildsym-legacy.h"
50 #include "stabsread.h"
51 #include "complaints.h"
53 #include "gdb-demangle.h"
55 #include "dictionary.h"
56 #include "mdebugread.h"
63 #include "coff/ecoff.h" /* COFF-like aspects of ecoff files. */
65 #include "libaout.h" /* Private BFD a.out information. */
66 #include "aout/aout64.h"
67 #include "aout/stab_gnu.h" /* STABS information. */
69 #include "expression.h"
73 /* Provide a way to test if we have both ECOFF and ELF symbol tables.
74 We use this define in order to know whether we should override a
75 symbol's ECOFF section with its ELF section. This is necessary in
76 case the symbol's ELF section could not be represented in ECOFF. */
77 #define ECOFF_IN_ELF(bfd) (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
78 && bfd_get_section_by_name (bfd, ".mdebug") != NULL)
80 /* The objfile we are currently reading. */
82 static struct objfile
*mdebugread_objfile
;
86 /* We put a pointer to this structure in the read_symtab_private field
91 /* Index of the FDR that this psymtab represents. */
93 /* The BFD that the psymtab was created from. */
95 const struct ecoff_debug_swap
*debug_swap
;
96 struct ecoff_debug_info
*debug_info
;
97 struct mdebug_pending
**pending_list
;
98 /* Pointer to external symbols for this file. */
100 /* Size of extern_tab. */
102 enum language pst_language
;
105 #define PST_PRIVATE(p) ((struct symloc *)(p)->read_symtab_private)
106 #define FDR_IDX(p) (PST_PRIVATE(p)->fdr_idx)
107 #define CUR_BFD(p) (PST_PRIVATE(p)->cur_bfd)
108 #define DEBUG_SWAP(p) (PST_PRIVATE(p)->debug_swap)
109 #define DEBUG_INFO(p) (PST_PRIVATE(p)->debug_info)
110 #define PENDING_LIST(p) (PST_PRIVATE(p)->pending_list)
112 #define SC_IS_TEXT(sc) ((sc) == scText \
113 || (sc) == scRConst \
116 #define SC_IS_DATA(sc) ((sc) == scData \
121 #define SC_IS_COMMON(sc) ((sc) == scCommon || (sc) == scSCommon)
122 #define SC_IS_BSS(sc) ((sc) == scBss)
123 #define SC_IS_SBSS(sc) ((sc) == scSBss)
124 #define SC_IS_UNDEF(sc) ((sc) == scUndefined || (sc) == scSUndefined)
126 /* Various complaints about symbol reading that don't abort the process. */
128 index_complaint (const char *arg1
)
130 complaint (_("bad aux index at symbol %s"), arg1
);
134 unknown_ext_complaint (const char *arg1
)
136 complaint (_("unknown external symbol %s"), arg1
);
140 basic_type_complaint (int arg1
, const char *arg2
)
142 complaint (_("cannot map ECOFF basic type 0x%x for %s"),
147 bad_tag_guess_complaint (const char *arg1
)
149 complaint (_("guessed tag type of %s incorrectly"), arg1
);
153 bad_rfd_entry_complaint (const char *arg1
, int arg2
, int arg3
)
155 complaint (_("bad rfd entry for %s: file %d, index %d"),
160 unexpected_type_code_complaint (const char *arg1
)
162 complaint (_("unexpected type code for %s"), arg1
);
165 /* Macros and extra defs. */
167 /* Puns: hard to find whether -g was used and how. */
169 #define MIN_GLEVEL GLEVEL_0
170 #define compare_glevel(a,b) \
171 (((a) == GLEVEL_3) ? ((b) < GLEVEL_3) : \
172 ((b) == GLEVEL_3) ? -1 : (int)((b) - (a)))
174 /* Things that really are local to this module. */
176 /* Remember what we deduced to be the source language of this psymtab. */
178 static enum language psymtab_language
= language_unknown
;
184 /* How to parse debugging information for CUR_BFD. */
186 static const struct ecoff_debug_swap
*debug_swap
;
188 /* Pointers to debugging information for CUR_BFD. */
190 static struct ecoff_debug_info
*debug_info
;
192 /* Pointer to current file descriptor record, and its index. */
197 /* Index of current symbol. */
201 /* Note how much "debuggable" this image is. We would like
202 to see at least one FDR with full symbols. */
204 static int max_gdbinfo
;
205 static int max_glevel
;
207 /* When examining .o files, report on undefined symbols. */
209 static int n_undef_symbols
, n_undef_labels
, n_undef_vars
, n_undef_procs
;
211 /* Pseudo symbol to use when putting stabs into the symbol table. */
213 static char stabs_symbol
[] = STABS_SYMBOL
;
215 /* Nonzero if we have seen ecoff debugging info for a file. */
217 static int found_ecoff_debugging_info
;
219 /* Forward declarations. */
221 static int upgrade_type (int, struct type
**, int, union aux_ext
*,
224 static void parse_partial_symbols (minimal_symbol_reader
&,
227 static int has_opaque_xref (FDR
*, SYMR
*);
229 static int cross_ref (int, union aux_ext
*, struct type
**, enum type_code
,
230 const char **, int, const char *);
232 static struct symbol
*new_symbol (const char *);
234 static struct type
*new_type (char *);
236 enum block_type
{ FUNCTION_BLOCK
, NON_FUNCTION_BLOCK
};
238 static struct block
*new_block (enum block_type
, enum language
);
240 static struct compunit_symtab
*new_symtab (const char *, int, struct objfile
*);
242 static struct linetable
*new_linetable (int);
244 static struct blockvector
*new_bvect (int);
246 static struct type
*parse_type (int, union aux_ext
*, unsigned int, int *,
249 static struct symbol
*mylookup_symbol (const char *, const struct block
*,
250 domain_enum
, enum address_class
);
252 static void sort_blocks (struct symtab
*);
254 static legacy_psymtab
*new_psymtab (const char *, struct objfile
*);
256 static void psymtab_to_symtab_1 (struct objfile
*objfile
,
257 legacy_psymtab
*, const char *);
259 static void add_block (struct block
*, struct symtab
*);
261 static void add_symbol (struct symbol
*, struct symtab
*, struct block
*);
263 static int add_line (struct linetable
*, int, CORE_ADDR
, int);
265 static struct linetable
*shrink_linetable (struct linetable
*);
267 static void handle_psymbol_enumerators (struct objfile
*, FDR
*, int,
270 static const char *mdebug_next_symbol_text (struct objfile
*);
272 /* Exported procedure: Builds a symtab from the partial symtab SELF.
273 Restores the environment in effect when SELF was created, delegates
274 most of the work to an ancillary procedure, and sorts
275 and reorders the symtab list at the end. SELF is not NULL. */
278 mdebug_read_symtab (legacy_psymtab
*self
, struct objfile
*objfile
)
280 next_symbol_text_func
= mdebug_next_symbol_text
;
282 psymtab_to_symtab_1 (objfile
, self
, self
->filename
);
284 /* Match with global symbols. This only needs to be done once,
285 after all of the symtabs and dependencies have been read in. */
286 scan_file_globals (objfile
);
289 /* File-level interface functions. */
291 /* Find a file descriptor given its index RF relative to a file CF. */
294 get_rfd (int cf
, int rf
)
300 fdrs
= debug_info
->fdr
;
302 /* Object files do not have the RFD table, all refs are absolute. */
305 (*debug_swap
->swap_rfd_in
) (cur_bfd
,
306 ((char *) debug_info
->external_rfd
308 * debug_swap
->external_rfd_size
)),
313 /* Return a safer print NAME for a file descriptor. */
319 return "<stripped file>";
322 return debug_info
->ss
+ f
->issBase
+ f
->rss
;
326 /* Read in and parse the symtab of the file OBJFILE. Symbols from
327 different sections are relocated via the SECTION_OFFSETS. */
330 mdebug_build_psymtabs (minimal_symbol_reader
&reader
,
331 struct objfile
*objfile
,
332 const struct ecoff_debug_swap
*swap
,
333 struct ecoff_debug_info
*info
)
335 cur_bfd
= objfile
->obfd
;
339 stabsread_new_init ();
340 free_header_files ();
341 init_header_files ();
343 /* Make sure all the FDR information is swapped in. */
344 if (info
->fdr
== NULL
)
350 info
->fdr
= (FDR
*) XOBNEWVEC (&objfile
->objfile_obstack
, FDR
,
351 info
->symbolic_header
.ifdMax
);
352 fdr_src
= (char *) info
->external_fdr
;
354 + info
->symbolic_header
.ifdMax
* swap
->external_fdr_size
);
356 for (; fdr_src
< fdr_end
; fdr_src
+= swap
->external_fdr_size
, fdr_ptr
++)
357 (*swap
->swap_fdr_in
) (objfile
->obfd
, fdr_src
, fdr_ptr
);
360 parse_partial_symbols (reader
, objfile
);
363 /* Check to make sure file was compiled with -g. If not, warn the
364 user of this limitation. */
365 if (compare_glevel (max_glevel
, GLEVEL_2
) < 0)
367 if (max_gdbinfo
== 0)
368 printf_unfiltered (_("\n%s not compiled with -g, "
369 "debugging support is limited.\n"),
371 printf_unfiltered (_("You should compile with -g2 or "
372 "-g3 for best debugging support.\n"));
377 /* Local utilities */
379 /* Map of FDR indexes to partial symtabs. */
383 legacy_psymtab
*pst
; /* the psymtab proper */
384 long n_globals
; /* exported globals (external symbols) */
385 long globals_offset
; /* cumulative */
389 /* Utility stack, used to nest procedures and blocks properly.
390 It is a doubly linked list, to avoid too many alloc/free.
391 Since we might need it quite a few times it is NOT deallocated
394 static struct parse_stack
396 struct parse_stack
*next
, *prev
;
397 struct symtab
*cur_st
; /* Current symtab. */
398 struct block
*cur_block
; /* Block in it. */
400 /* What are we parsing. stFile, or stBlock are for files and
401 blocks. stProc or stStaticProc means we have seen the start of a
402 procedure, but not the start of the block within in. When we see
403 the start of that block, we change it to stNil, without pushing a
404 new block, i.e. stNil means both a procedure and a block. */
408 struct type
*cur_type
; /* Type we parse fields for. */
409 int cur_field
; /* Field number in cur_type. */
410 CORE_ADDR procadr
; /* Start addres of this procedure. */
411 int numargs
; /* Its argument count. */
414 *top_stack
; /* Top stack ptr */
417 /* Enter a new lexical context. */
420 push_parse_stack (void)
422 struct parse_stack
*newobj
;
424 /* Reuse frames if possible. */
425 if (top_stack
&& top_stack
->prev
)
426 newobj
= top_stack
->prev
;
428 newobj
= XCNEW (struct parse_stack
);
429 /* Initialize new frame with previous content. */
432 struct parse_stack
*prev
= newobj
->prev
;
434 *newobj
= *top_stack
;
435 top_stack
->prev
= newobj
;
437 newobj
->next
= top_stack
;
442 /* Exit a lexical context. */
445 pop_parse_stack (void)
450 top_stack
= top_stack
->next
;
454 /* Cross-references might be to things we haven't looked at
455 yet, e.g. type references. To avoid too many type
456 duplications we keep a quick fixup table, an array
457 of lists of references indexed by file descriptor. */
459 struct mdebug_pending
461 struct mdebug_pending
*next
; /* link */
462 char *s
; /* the unswapped symbol */
463 struct type
*t
; /* its partial type descriptor */
467 /* The pending information is kept for an entire object file. We
468 allocate the pending information table when we create the partial
469 symbols, and we store a pointer to the single table in each
472 static struct mdebug_pending
**pending_list
;
474 /* Check whether we already saw symbol SH in file FH. */
476 static struct mdebug_pending
*
477 is_pending_symbol (FDR
*fh
, char *sh
)
479 int f_idx
= fh
- debug_info
->fdr
;
480 struct mdebug_pending
*p
;
482 /* Linear search is ok, list is typically no more than 10 deep. */
483 for (p
= pending_list
[f_idx
]; p
; p
= p
->next
)
489 /* Add a new symbol SH of type T. */
492 add_pending (FDR
*fh
, char *sh
, struct type
*t
)
494 int f_idx
= fh
- debug_info
->fdr
;
495 struct mdebug_pending
*p
= is_pending_symbol (fh
, sh
);
497 /* Make sure we do not make duplicates. */
500 p
= XOBNEW (&mdebugread_objfile
->objfile_obstack
, mdebug_pending
);
503 p
->next
= pending_list
[f_idx
];
504 pending_list
[f_idx
] = p
;
509 /* Parsing Routines proper. */
512 reg_value_complaint (int regnum
, int num_regs
, const char *sym
)
514 complaint (_("bad register number %d (max %d) in symbol %s"),
515 regnum
, num_regs
- 1, sym
);
518 /* Parse a single symbol. Mostly just make up a GDB symbol for it.
519 For blocks, procedures and types we open a new lexical context.
520 This is basically just a big switch on the symbol's type. Argument
521 AX is the base pointer of aux symbols for this file (fh->iauxBase).
522 EXT_SH points to the unswapped symbol, which is needed for struct,
523 union, etc., types; it is NULL for an EXTR. BIGEND says whether
524 aux symbols are big-endian or little-endian. Return count of
525 SYMR's handled (normally one). */
528 mdebug_reg_to_regnum (struct symbol
*sym
, struct gdbarch
*gdbarch
)
530 int regno
= gdbarch_ecoff_reg_to_regnum (gdbarch
, SYMBOL_VALUE (sym
));
532 if (regno
< 0 || regno
>= gdbarch_num_cooked_regs (gdbarch
))
534 reg_value_complaint (regno
, gdbarch_num_cooked_regs (gdbarch
),
537 regno
= gdbarch_sp_regnum (gdbarch
); /* Known safe, though useless. */
543 static const struct symbol_register_ops mdebug_register_funcs
= {
547 /* The "aclass" indices for computed symbols. */
549 static int mdebug_register_index
;
550 static int mdebug_regparm_index
;
552 /* Common code for symbols describing data. */
555 add_data_symbol (SYMR
*sh
, union aux_ext
*ax
, int bigend
,
556 struct symbol
*s
, int aclass_index
, struct block
*b
,
557 struct objfile
*objfile
, const char *name
)
559 SYMBOL_DOMAIN (s
) = VAR_DOMAIN
;
560 SYMBOL_ACLASS_INDEX (s
) = aclass_index
;
561 add_symbol (s
, top_stack
->cur_st
, b
);
563 /* Type could be missing if file is compiled without debugging info. */
564 if (SC_IS_UNDEF (sh
->sc
)
565 || sh
->sc
== scNil
|| sh
->index
== indexNil
)
566 SYMBOL_TYPE (s
) = objfile_type (objfile
)->nodebug_data_symbol
;
568 SYMBOL_TYPE (s
) = parse_type (cur_fd
, ax
, sh
->index
, 0, bigend
, name
);
569 /* Value of a data symbol is its memory address. */
573 parse_symbol (SYMR
*sh
, union aux_ext
*ax
, char *ext_sh
, int bigend
,
574 const section_offsets
§ion_offsets
, struct objfile
*objfile
)
576 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
577 const bfd_size_type external_sym_size
= debug_swap
->external_sym_size
;
578 void (*const swap_sym_in
) (bfd
*, void *, SYMR
*) = debug_swap
->swap_sym_in
;
582 struct mdebug_pending
*pend
;
586 long svalue
= sh
->value
;
590 name
= debug_info
->ssext
+ sh
->iss
;
592 name
= debug_info
->ss
+ cur_fdr
->issBase
+ sh
->iss
;
598 /* Do not relocate relative values.
599 The value of a stEnd symbol is the displacement from the
600 corresponding start symbol value.
601 The value of a stBlock symbol is the displacement from the
602 procedure address. */
603 if (sh
->st
!= stEnd
&& sh
->st
!= stBlock
)
604 sh
->value
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
611 sh
->value
+= section_offsets
[SECT_OFF_DATA (objfile
)];
615 sh
->value
+= section_offsets
[SECT_OFF_BSS (objfile
)];
624 case stGlobal
: /* External symbol, goes into global block. */
625 b
= BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (top_stack
->cur_st
),
627 s
= new_symbol (name
);
628 SET_SYMBOL_VALUE_ADDRESS (s
, (CORE_ADDR
) sh
->value
);
629 add_data_symbol (sh
, ax
, bigend
, s
, LOC_STATIC
, b
, objfile
, name
);
632 case stStatic
: /* Static data, goes into current block. */
633 b
= top_stack
->cur_block
;
634 s
= new_symbol (name
);
635 if (SC_IS_COMMON (sh
->sc
))
637 /* It is a FORTRAN common block. At least for SGI Fortran the
638 address is not in the symbol; we need to fix it later in
639 scan_file_globals. */
640 int bucket
= hashname (s
->linkage_name ());
641 SYMBOL_VALUE_CHAIN (s
) = global_sym_chain
[bucket
];
642 global_sym_chain
[bucket
] = s
;
645 SET_SYMBOL_VALUE_ADDRESS (s
, (CORE_ADDR
) sh
->value
);
646 add_data_symbol (sh
, ax
, bigend
, s
, LOC_STATIC
, b
, objfile
, name
);
649 case stLocal
: /* Local variable, goes into current block. */
650 b
= top_stack
->cur_block
;
651 s
= new_symbol (name
);
652 SYMBOL_VALUE (s
) = svalue
;
653 if (sh
->sc
== scRegister
)
654 add_data_symbol (sh
, ax
, bigend
, s
, mdebug_register_index
,
657 add_data_symbol (sh
, ax
, bigend
, s
, LOC_LOCAL
,
661 case stParam
: /* Arg to procedure, goes into current
664 found_ecoff_debugging_info
= 1;
665 top_stack
->numargs
++;
667 /* Special GNU C++ name. */
668 if (is_cplus_marker (name
[0]) && name
[1] == 't' && name
[2] == 0)
669 name
= "this"; /* FIXME, not alloc'd in obstack. */
670 s
= new_symbol (name
);
672 SYMBOL_DOMAIN (s
) = VAR_DOMAIN
;
673 SYMBOL_IS_ARGUMENT (s
) = 1;
677 /* Pass by value in register. */
678 SYMBOL_ACLASS_INDEX (s
) = mdebug_register_index
;
681 /* Pass by reference on stack. */
682 SYMBOL_ACLASS_INDEX (s
) = LOC_REF_ARG
;
685 /* Pass by reference in register. */
686 SYMBOL_ACLASS_INDEX (s
) = mdebug_regparm_index
;
689 /* Pass by value on stack. */
690 SYMBOL_ACLASS_INDEX (s
) = LOC_ARG
;
693 SYMBOL_VALUE (s
) = svalue
;
694 SYMBOL_TYPE (s
) = parse_type (cur_fd
, ax
, sh
->index
, 0, bigend
, name
);
695 add_symbol (s
, top_stack
->cur_st
, top_stack
->cur_block
);
698 case stLabel
: /* label, goes into current block. */
699 s
= new_symbol (name
);
700 SYMBOL_DOMAIN (s
) = VAR_DOMAIN
; /* So that it can be used */
701 SYMBOL_ACLASS_INDEX (s
) = LOC_LABEL
; /* but not misused. */
702 SET_SYMBOL_VALUE_ADDRESS (s
, (CORE_ADDR
) sh
->value
);
703 SYMBOL_TYPE (s
) = objfile_type (objfile
)->builtin_int
;
704 add_symbol (s
, top_stack
->cur_st
, top_stack
->cur_block
);
707 case stProc
: /* Procedure, usually goes into global block. */
708 case stStaticProc
: /* Static procedure, goes into current block. */
709 /* For stProc symbol records, we need to check the storage class
710 as well, as only (stProc, scText) entries represent "real"
711 procedures - See the Compaq document titled "Object File /
712 Symbol Table Format Specification" for more information.
713 If the storage class is not scText, we discard the whole block
714 of symbol records for this stProc. */
715 if (sh
->st
== stProc
&& sh
->sc
!= scText
)
717 char *ext_tsym
= ext_sh
;
718 int keep_counting
= 1;
721 while (keep_counting
)
723 ext_tsym
+= external_sym_size
;
724 (*swap_sym_in
) (cur_bfd
, ext_tsym
, &tsym
);
734 complaint (_("unknown symbol type 0x%x"), sh
->st
);
740 s
= new_symbol (name
);
741 SYMBOL_DOMAIN (s
) = VAR_DOMAIN
;
742 SYMBOL_ACLASS_INDEX (s
) = LOC_BLOCK
;
743 /* Type of the return value. */
744 if (SC_IS_UNDEF (sh
->sc
) || sh
->sc
== scNil
)
745 t
= objfile_type (objfile
)->builtin_int
;
748 t
= parse_type (cur_fd
, ax
, sh
->index
+ 1, 0, bigend
, name
);
749 if (strcmp (name
, "malloc") == 0
750 && TYPE_CODE (t
) == TYPE_CODE_VOID
)
752 /* I don't know why, but, at least under Alpha GNU/Linux,
753 when linking against a malloc without debugging
754 symbols, its read as a function returning void---this
755 is bad because it means we cannot call functions with
756 string arguments interactively; i.e., "call
757 printf("howdy\n")" would fail with the error message
758 "program has no memory available". To avoid this, we
759 patch up the type and make it void*
760 instead. (davidm@azstarnet.com). */
761 t
= make_pointer_type (t
, NULL
);
764 b
= top_stack
->cur_block
;
765 if (sh
->st
== stProc
)
767 const struct blockvector
*bv
768 = SYMTAB_BLOCKVECTOR (top_stack
->cur_st
);
770 /* The next test should normally be true, but provides a
771 hook for nested functions (which we don't want to make
773 if (b
== BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
))
774 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
775 /* Irix 5 sometimes has duplicate names for the same
776 function. We want to add such names up at the global
777 level, not as a nested function. */
778 else if (sh
->value
== top_stack
->procadr
)
779 b
= BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
781 add_symbol (s
, top_stack
->cur_st
, b
);
783 /* Make a type for the procedure itself. */
784 SYMBOL_TYPE (s
) = lookup_function_type (t
);
786 /* All functions in C++ have prototypes. For C we don't have enough
787 information in the debug info. */
788 if (s
->language () == language_cplus
)
789 TYPE_PROTOTYPED (SYMBOL_TYPE (s
)) = 1;
791 /* Create and enter a new lexical context. */
792 b
= new_block (FUNCTION_BLOCK
, s
->language ());
793 SYMBOL_BLOCK_VALUE (s
) = b
;
794 BLOCK_FUNCTION (b
) = s
;
795 BLOCK_START (b
) = BLOCK_END (b
) = sh
->value
;
796 BLOCK_SUPERBLOCK (b
) = top_stack
->cur_block
;
797 add_block (b
, top_stack
->cur_st
);
799 /* Not if we only have partial info. */
800 if (SC_IS_UNDEF (sh
->sc
) || sh
->sc
== scNil
)
804 top_stack
->cur_block
= b
;
805 top_stack
->blocktype
= sh
->st
;
806 top_stack
->cur_type
= SYMBOL_TYPE (s
);
807 top_stack
->cur_field
= -1;
808 top_stack
->procadr
= sh
->value
;
809 top_stack
->numargs
= 0;
812 /* Beginning of code for structure, union, and enum definitions.
813 They all share a common set of local variables, defined here. */
815 enum type_code type_code
;
821 case stStruct
: /* Start a block defining a struct type. */
822 type_code
= TYPE_CODE_STRUCT
;
823 goto structured_common
;
825 case stUnion
: /* Start a block defining a union type. */
826 type_code
= TYPE_CODE_UNION
;
827 goto structured_common
;
829 case stEnum
: /* Start a block defining an enum type. */
830 type_code
= TYPE_CODE_ENUM
;
831 goto structured_common
;
833 case stBlock
: /* Either a lexical block, or some type. */
834 if (sh
->sc
!= scInfo
&& !SC_IS_COMMON (sh
->sc
))
835 goto case_stBlock_code
; /* Lexical block */
837 type_code
= TYPE_CODE_UNDEF
; /* We have a type. */
839 /* Common code for handling struct, union, enum, and/or as-yet-
840 unknown-type blocks of info about structured data. `type_code'
841 has been set to the proper TYPE_CODE, if we know it. */
843 found_ecoff_debugging_info
= 1;
845 top_stack
->blocktype
= stBlock
;
847 /* First count the number of fields and the highest value. */
850 for (ext_tsym
= ext_sh
+ external_sym_size
;
852 ext_tsym
+= external_sym_size
)
856 (*swap_sym_in
) (cur_bfd
, ext_tsym
, &tsym
);
861 /* C++ encodes class types as structures where there the
862 methods are encoded as stProc. The scope of stProc
863 symbols also ends with stEnd, thus creating a risk of
864 taking the wrong stEnd symbol record as the end of
865 the current struct, which would cause GDB to undercount
866 the real number of fields in this struct. To make sure
867 we really reached the right stEnd symbol record, we
868 check the associated name, and match it against the
869 struct name. Since method names are mangled while
870 the class name is not, there is no risk of having a
871 method whose name is identical to the class name
872 (in particular constructor method names are different
873 from the class name). There is therefore no risk that
874 this check stops the count on the StEnd of a method.
876 Also, assume that we're really at the end when tsym.iss
878 if (tsym
.iss
== issNull
879 || strcmp (debug_info
->ss
+ cur_fdr
->issBase
+ tsym
.iss
,
885 if (nfields
== 0 && type_code
== TYPE_CODE_UNDEF
)
887 /* If the type of the member is Nil (or Void),
888 without qualifiers, assume the tag is an
890 Alpha cc -migrate enums are recognized by a zero
891 index and a zero symbol value.
892 DU 4.0 cc enums are recognized by a member type of
893 btEnum without qualifiers and a zero symbol value. */
894 if (tsym
.index
== indexNil
895 || (tsym
.index
== 0 && sh
->value
== 0))
896 type_code
= TYPE_CODE_ENUM
;
899 (*debug_swap
->swap_tir_in
) (bigend
,
900 &ax
[tsym
.index
].a_ti
,
902 if ((tir
.bt
== btNil
|| tir
.bt
== btVoid
903 || (tir
.bt
== btEnum
&& sh
->value
== 0))
905 type_code
= TYPE_CODE_ENUM
;
909 if (tsym
.value
> max_value
)
910 max_value
= tsym
.value
;
919 /* This is a no-op; is it trying to tell us something
920 we should be checking? */
921 if (tsym
.sc
== scVariant
); /*UNIMPLEMENTED */
925 /* This is something like a struct within a
926 struct. Skip over the fields of the inner
927 struct. The -1 is because the for loop will
928 increment ext_tsym. */
929 ext_tsym
= ((char *) debug_info
->external_sym
930 + ((cur_fdr
->isymBase
+ tsym
.index
- 1)
931 * external_sym_size
));
937 /* mips cc puts out a typedef for struct x if it is not yet
938 defined when it encounters
939 struct y { struct x *xp; };
944 /* Irix5 cc puts out a stIndirect for struct x if it is not
945 yet defined when it encounters
946 struct y { struct x *xp; };
951 complaint (_("declaration block contains "
952 "unhandled symbol type %d"),
958 /* In an stBlock, there is no way to distinguish structs,
959 unions, and enums at this point. This is a bug in the
960 original design (that has been fixed with the recent
961 addition of the stStruct, stUnion, and stEnum symbol
962 types.) The way you can tell is if/when you see a variable
963 or field of that type. In that case the variable's type
964 (in the AUX table) says if the type is struct, union, or
965 enum, and points back to the stBlock here. So you can
966 patch the tag kind up later - but only if there actually is
967 a variable or field of that type.
969 So until we know for sure, we will guess at this point.
971 If the first member has index==indexNil or a void type,
972 assume we have an enumeration.
973 Otherwise, if there is more than one member, and all
974 the members have offset 0, assume we have a union.
975 Otherwise, assume we have a struct.
977 The heuristic could guess wrong in the case of of an
978 enumeration with no members or a union with one (or zero)
979 members, or when all except the last field of a struct have
980 width zero. These are uncommon and/or illegal situations,
981 and in any case guessing wrong probably doesn't matter
984 But if we later do find out we were wrong, we fixup the tag
985 kind. Members of an enumeration must be handled
986 differently from struct/union fields, and that is harder to
987 patch up, but luckily we shouldn't need to. (If there are
988 any enumeration members, we can tell for sure it's an enum
991 if (type_code
== TYPE_CODE_UNDEF
)
993 if (nfields
> 1 && max_value
== 0)
994 type_code
= TYPE_CODE_UNION
;
996 type_code
= TYPE_CODE_STRUCT
;
999 /* Create a new type or use the pending type. */
1000 pend
= is_pending_symbol (cur_fdr
, ext_sh
);
1003 t
= new_type (NULL
);
1004 add_pending (cur_fdr
, ext_sh
, t
);
1009 /* Do not set the tag name if it is a compiler generated tag name
1010 (.Fxx or .xxfake or empty) for unnamed struct/union/enums.
1011 Alpha cc puts out an sh->iss of zero for those. */
1012 if (sh
->iss
== 0 || name
[0] == '.' || name
[0] == '\0')
1013 TYPE_NAME (t
) = NULL
;
1015 TYPE_NAME (t
) = obconcat (&mdebugread_objfile
->objfile_obstack
,
1016 name
, (char *) NULL
);
1018 TYPE_CODE (t
) = type_code
;
1019 TYPE_LENGTH (t
) = sh
->value
;
1020 TYPE_NFIELDS (t
) = nfields
;
1021 TYPE_FIELDS (t
) = f
= ((struct field
*)
1023 nfields
* sizeof (struct field
)));
1025 if (type_code
== TYPE_CODE_ENUM
)
1027 int unsigned_enum
= 1;
1029 /* This is a non-empty enum. */
1031 /* DEC c89 has the number of enumerators in the sh.value field,
1032 not the type length, so we have to compensate for that
1033 incompatibility quirk.
1034 This might do the wrong thing for an enum with one or two
1035 enumerators and gcc -gcoff -fshort-enums, but these cases
1036 are hopefully rare enough.
1037 Alpha cc -migrate has a sh.value field of zero, we adjust
1039 if (TYPE_LENGTH (t
) == TYPE_NFIELDS (t
)
1040 || TYPE_LENGTH (t
) == 0)
1041 TYPE_LENGTH (t
) = gdbarch_int_bit (gdbarch
) / HOST_CHAR_BIT
;
1042 for (ext_tsym
= ext_sh
+ external_sym_size
;
1044 ext_tsym
+= external_sym_size
)
1047 struct symbol
*enum_sym
;
1049 (*swap_sym_in
) (cur_bfd
, ext_tsym
, &tsym
);
1051 if (tsym
.st
!= stMember
)
1054 SET_FIELD_ENUMVAL (*f
, tsym
.value
);
1055 FIELD_TYPE (*f
) = t
;
1056 FIELD_NAME (*f
) = debug_info
->ss
+ cur_fdr
->issBase
+ tsym
.iss
;
1057 FIELD_BITSIZE (*f
) = 0;
1059 enum_sym
= allocate_symbol (mdebugread_objfile
);
1060 enum_sym
->set_linkage_name
1061 (obstack_strdup (&mdebugread_objfile
->objfile_obstack
,
1063 SYMBOL_ACLASS_INDEX (enum_sym
) = LOC_CONST
;
1064 SYMBOL_TYPE (enum_sym
) = t
;
1065 SYMBOL_DOMAIN (enum_sym
) = VAR_DOMAIN
;
1066 SYMBOL_VALUE (enum_sym
) = tsym
.value
;
1067 if (SYMBOL_VALUE (enum_sym
) < 0)
1069 add_symbol (enum_sym
, top_stack
->cur_st
, top_stack
->cur_block
);
1071 /* Skip the stMembers that we've handled. */
1076 TYPE_UNSIGNED (t
) = 1;
1078 /* Make this the current type. */
1079 top_stack
->cur_type
= t
;
1080 top_stack
->cur_field
= 0;
1082 /* Do not create a symbol for alpha cc unnamed structs. */
1086 /* gcc puts out an empty struct for an opaque struct definitions,
1087 do not create a symbol for it either. */
1088 if (TYPE_NFIELDS (t
) == 0)
1094 s
= new_symbol (name
);
1095 SYMBOL_DOMAIN (s
) = STRUCT_DOMAIN
;
1096 SYMBOL_ACLASS_INDEX (s
) = LOC_TYPEDEF
;
1097 SYMBOL_VALUE (s
) = 0;
1098 SYMBOL_TYPE (s
) = t
;
1099 add_symbol (s
, top_stack
->cur_st
, top_stack
->cur_block
);
1102 /* End of local variables shared by struct, union, enum, and
1103 block (as yet unknown struct/union/enum) processing. */
1107 found_ecoff_debugging_info
= 1;
1108 /* Beginnning of (code) block. Value of symbol
1109 is the displacement from procedure start. */
1110 push_parse_stack ();
1112 /* Do not start a new block if this is the outermost block of a
1113 procedure. This allows the LOC_BLOCK symbol to point to the
1114 block with the local variables, so funcname::var works. */
1115 if (top_stack
->blocktype
== stProc
1116 || top_stack
->blocktype
== stStaticProc
)
1118 top_stack
->blocktype
= stNil
;
1122 top_stack
->blocktype
= stBlock
;
1123 b
= new_block (NON_FUNCTION_BLOCK
, psymtab_language
);
1124 BLOCK_START (b
) = sh
->value
+ top_stack
->procadr
;
1125 BLOCK_SUPERBLOCK (b
) = top_stack
->cur_block
;
1126 top_stack
->cur_block
= b
;
1127 add_block (b
, top_stack
->cur_st
);
1130 case stEnd
: /* end (of anything) */
1131 if (sh
->sc
== scInfo
|| SC_IS_COMMON (sh
->sc
))
1133 /* Finished with type */
1134 top_stack
->cur_type
= 0;
1136 else if (sh
->sc
== scText
&&
1137 (top_stack
->blocktype
== stProc
||
1138 top_stack
->blocktype
== stStaticProc
))
1140 /* Finished with procedure */
1141 const struct blockvector
*bv
1142 = SYMTAB_BLOCKVECTOR (top_stack
->cur_st
);
1143 struct mdebug_extra_func_info
*e
;
1144 struct block
*cblock
= top_stack
->cur_block
;
1145 struct type
*ftype
= top_stack
->cur_type
;
1148 BLOCK_END (top_stack
->cur_block
) += sh
->value
; /* size */
1150 /* Make up special symbol to contain procedure specific info. */
1151 s
= new_symbol (MDEBUG_EFI_SYMBOL_NAME
);
1152 SYMBOL_DOMAIN (s
) = LABEL_DOMAIN
;
1153 SYMBOL_ACLASS_INDEX (s
) = LOC_CONST
;
1154 SYMBOL_TYPE (s
) = objfile_type (mdebugread_objfile
)->builtin_void
;
1155 e
= OBSTACK_ZALLOC (&mdebugread_objfile
->objfile_obstack
,
1156 mdebug_extra_func_info
);
1157 SYMBOL_VALUE_BYTES (s
) = (gdb_byte
*) e
;
1158 e
->numargs
= top_stack
->numargs
;
1159 e
->pdr
.framereg
= -1;
1160 add_symbol (s
, top_stack
->cur_st
, top_stack
->cur_block
);
1162 /* f77 emits proc-level with address bounds==[0,0],
1163 So look for such child blocks, and patch them. */
1164 for (i
= 0; i
< BLOCKVECTOR_NBLOCKS (bv
); i
++)
1166 struct block
*b_bad
= BLOCKVECTOR_BLOCK (bv
, i
);
1168 if (BLOCK_SUPERBLOCK (b_bad
) == cblock
1169 && BLOCK_START (b_bad
) == top_stack
->procadr
1170 && BLOCK_END (b_bad
) == top_stack
->procadr
)
1172 BLOCK_START (b_bad
) = BLOCK_START (cblock
);
1173 BLOCK_END (b_bad
) = BLOCK_END (cblock
);
1177 if (TYPE_NFIELDS (ftype
) <= 0)
1179 /* No parameter type information is recorded with the function's
1180 type. Set that from the type of the parameter symbols. */
1181 int nparams
= top_stack
->numargs
;
1187 struct block_iterator iter
;
1189 TYPE_NFIELDS (ftype
) = nparams
;
1190 TYPE_FIELDS (ftype
) = (struct field
*)
1191 TYPE_ALLOC (ftype
, nparams
* sizeof (struct field
));
1194 ALL_BLOCK_SYMBOLS (cblock
, iter
, sym
)
1196 if (iparams
== nparams
)
1199 if (SYMBOL_IS_ARGUMENT (sym
))
1201 TYPE_FIELD_TYPE (ftype
, iparams
) = SYMBOL_TYPE (sym
);
1202 TYPE_FIELD_ARTIFICIAL (ftype
, iparams
) = 0;
1209 else if (sh
->sc
== scText
&& top_stack
->blocktype
== stBlock
)
1211 /* End of (code) block. The value of the symbol is the
1212 displacement from the procedure`s start address of the
1213 end of this block. */
1214 BLOCK_END (top_stack
->cur_block
) = sh
->value
+ top_stack
->procadr
;
1216 else if (sh
->sc
== scText
&& top_stack
->blocktype
== stNil
)
1218 /* End of outermost block. Pop parse stack and ignore. The
1219 following stEnd of stProc will take care of the block. */
1222 else if (sh
->sc
== scText
&& top_stack
->blocktype
== stFile
)
1224 /* End of file. Pop parse stack and ignore. Higher
1225 level code deals with this. */
1229 complaint (_("stEnd with storage class %d not handled"), sh
->sc
);
1231 pop_parse_stack (); /* Restore previous lexical context. */
1234 case stMember
: /* member of struct or union */
1237 = &TYPE_FIELDS (top_stack
->cur_type
)[top_stack
->cur_field
++];
1238 FIELD_NAME (*f
) = name
;
1239 SET_FIELD_BITPOS (*f
, sh
->value
);
1241 FIELD_TYPE (*f
) = parse_type (cur_fd
, ax
, sh
->index
,
1242 &bitsize
, bigend
, name
);
1243 FIELD_BITSIZE (*f
) = bitsize
;
1247 case stIndirect
: /* forward declaration on Irix5 */
1248 /* Forward declarations from Irix5 cc are handled by cross_ref,
1252 case stTypedef
: /* type definition */
1253 found_ecoff_debugging_info
= 1;
1255 /* Typedefs for forward declarations and opaque structs from alpha cc
1256 are handled by cross_ref, skip them. */
1260 /* Parse the type or use the pending type. */
1261 pend
= is_pending_symbol (cur_fdr
, ext_sh
);
1264 t
= parse_type (cur_fd
, ax
, sh
->index
, NULL
, bigend
, name
);
1265 add_pending (cur_fdr
, ext_sh
, t
);
1270 /* Mips cc puts out a typedef with the name of the struct for forward
1271 declarations. These should not go into the symbol table and
1272 TYPE_NAME should not be set for them.
1273 They can't be distinguished from an intentional typedef to
1274 the same name however:
1276 struct x { int ix; int jx; };
1280 struct xx {int ixx; int jxx; };
1281 generates a cross referencing stTypedef for x and xx.
1282 The user visible effect of this is that the type of a pointer
1283 to struct foo sometimes is given as `foo *' instead of `struct foo *'.
1284 The problem is fixed with alpha cc and Irix5 cc. */
1286 /* However if the typedef cross references to an opaque aggregate, it
1287 is safe to omit it from the symbol table. */
1289 if (has_opaque_xref (cur_fdr
, sh
))
1291 s
= new_symbol (name
);
1292 SYMBOL_DOMAIN (s
) = VAR_DOMAIN
;
1293 SYMBOL_ACLASS_INDEX (s
) = LOC_TYPEDEF
;
1294 SYMBOL_BLOCK_VALUE (s
) = top_stack
->cur_block
;
1295 SYMBOL_TYPE (s
) = t
;
1296 add_symbol (s
, top_stack
->cur_st
, top_stack
->cur_block
);
1298 /* Incomplete definitions of structs should not get a name. */
1299 if (TYPE_NAME (SYMBOL_TYPE (s
)) == NULL
1300 && (TYPE_NFIELDS (SYMBOL_TYPE (s
)) != 0
1301 || (TYPE_CODE (SYMBOL_TYPE (s
)) != TYPE_CODE_STRUCT
1302 && TYPE_CODE (SYMBOL_TYPE (s
)) != TYPE_CODE_UNION
)))
1304 if (TYPE_CODE (SYMBOL_TYPE (s
)) == TYPE_CODE_PTR
1305 || TYPE_CODE (SYMBOL_TYPE (s
)) == TYPE_CODE_FUNC
)
1307 /* If we are giving a name to a type such as "pointer to
1308 foo" or "function returning foo", we better not set
1309 the TYPE_NAME. If the program contains "typedef char
1310 *caddr_t;", we don't want all variables of type char
1311 * to print as caddr_t. This is not just a
1312 consequence of GDB's type management; CC and GCC (at
1313 least through version 2.4) both output variables of
1314 either type char * or caddr_t with the type
1315 refering to the stTypedef symbol for caddr_t. If a future
1316 compiler cleans this up it GDB is not ready for it
1317 yet, but if it becomes ready we somehow need to
1318 disable this check (without breaking the PCC/GCC2.4
1323 Fortunately, this check seems not to be necessary
1324 for anything except pointers or functions. */
1327 TYPE_NAME (SYMBOL_TYPE (s
)) = s
->linkage_name ();
1331 case stFile
: /* file name */
1332 push_parse_stack ();
1333 top_stack
->blocktype
= sh
->st
;
1336 /* I`ve never seen these for C */
1338 break; /* register relocation */
1340 break; /* forwarding address */
1342 break; /* constant */
1344 complaint (_("unknown symbol type 0x%x"), sh
->st
);
1353 static const struct objfile_key
<struct type
*,
1354 gdb::noop_deleter
<struct type
*>>
1357 static struct type
*
1358 basic_type (int bt
, struct objfile
*objfile
)
1360 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
1361 struct type
**map_bt
= basic_type_data
.get (objfile
);
1369 map_bt
= OBSTACK_CALLOC (&objfile
->objfile_obstack
,
1370 btMax
, struct type
*);
1371 basic_type_data
.set (objfile
, map_bt
);
1380 tp
= objfile_type (objfile
)->builtin_void
;
1384 tp
= init_pointer_type (objfile
, 32, "adr_32",
1385 objfile_type (objfile
)->builtin_void
);
1389 tp
= init_integer_type (objfile
, 8, 0, "char");
1390 TYPE_NOSIGN (tp
) = 1;
1394 tp
= init_integer_type (objfile
, 8, 1, "unsigned char");
1398 tp
= init_integer_type (objfile
, 16, 0, "short");
1402 tp
= init_integer_type (objfile
, 16, 1, "unsigned short");
1406 tp
= init_integer_type (objfile
, 32, 0, "int");
1410 tp
= init_integer_type (objfile
, 32, 1, "unsigned int");
1414 tp
= init_integer_type (objfile
, 32, 0, "long");
1418 tp
= init_integer_type (objfile
, 32, 1, "unsigned long");
1422 tp
= init_float_type (objfile
, gdbarch_float_bit (gdbarch
),
1423 "float", gdbarch_float_format (gdbarch
));
1427 tp
= init_float_type (objfile
, gdbarch_double_bit (gdbarch
),
1428 "double", gdbarch_double_format (gdbarch
));
1432 tp
= init_complex_type (objfile
, "complex",
1433 basic_type (btFloat
, objfile
));
1437 tp
= init_complex_type (objfile
, "double complex",
1438 basic_type (btFloat
, objfile
));
1442 /* We use TYPE_CODE_INT to print these as integers. Does this do any
1443 good? Would we be better off with TYPE_CODE_ERROR? Should
1444 TYPE_CODE_ERROR print things in hex if it knows the size? */
1445 tp
= init_integer_type (objfile
, gdbarch_int_bit (gdbarch
), 0,
1450 tp
= init_type (objfile
, TYPE_CODE_ERROR
,
1451 gdbarch_double_bit (gdbarch
), "floating decimal");
1455 /* Is a "string" the way btString means it the same as TYPE_CODE_STRING?
1457 tp
= init_type (objfile
, TYPE_CODE_STRING
, TARGET_CHAR_BIT
, "string");
1461 tp
= objfile_type (objfile
)->builtin_void
;
1465 tp
= init_integer_type (objfile
, 64, 0, "long");
1469 tp
= init_integer_type (objfile
, 64, 1, "unsigned long");
1473 tp
= init_integer_type (objfile
, 64, 0, "long long");
1477 tp
= init_integer_type (objfile
, 64, 1, "unsigned long long");
1481 tp
= init_pointer_type (objfile
, 64, "adr_64",
1482 objfile_type (objfile
)->builtin_void
);
1486 tp
= init_integer_type (objfile
, 64, 0, "int");
1490 tp
= init_integer_type (objfile
, 64, 1, "unsigned int");
1502 /* Parse the type information provided in the raw AX entries for
1503 the symbol SH. Return the bitfield size in BS, in case.
1504 We must byte-swap the AX entries before we use them; BIGEND says whether
1505 they are big-endian or little-endian (from fh->fBigendian). */
1507 static struct type
*
1508 parse_type (int fd
, union aux_ext
*ax
, unsigned int aux_index
, int *bs
,
1509 int bigend
, const char *sym_name
)
1512 struct type
*tp
= 0;
1513 enum type_code type_code
= TYPE_CODE_UNDEF
;
1515 /* Handle undefined types, they have indexNil. */
1516 if (aux_index
== indexNil
)
1517 return basic_type (btInt
, mdebugread_objfile
);
1519 /* Handle corrupt aux indices. */
1520 if (aux_index
>= (debug_info
->fdr
+ fd
)->caux
)
1522 index_complaint (sym_name
);
1523 return basic_type (btInt
, mdebugread_objfile
);
1527 /* Use aux as a type information record, map its basic type. */
1528 (*debug_swap
->swap_tir_in
) (bigend
, &ax
->a_ti
, t
);
1529 tp
= basic_type (t
->bt
, mdebugread_objfile
);
1532 /* Cannot use builtin types -- build our own. */
1536 type_code
= TYPE_CODE_STRUCT
;
1539 type_code
= TYPE_CODE_UNION
;
1542 type_code
= TYPE_CODE_ENUM
;
1545 type_code
= TYPE_CODE_RANGE
;
1548 type_code
= TYPE_CODE_SET
;
1551 /* alpha cc -migrate uses this for typedefs. The true type will
1552 be obtained by crossreferencing below. */
1553 type_code
= TYPE_CODE_ERROR
;
1556 /* alpha cc uses this for typedefs. The true type will be
1557 obtained by crossreferencing below. */
1558 type_code
= TYPE_CODE_ERROR
;
1561 basic_type_complaint (t
->bt
, sym_name
);
1562 return basic_type (btInt
, mdebugread_objfile
);
1566 /* Move on to next aux. */
1571 int width
= AUX_GET_WIDTH (bigend
, ax
);
1573 /* Inhibit core dumps if TIR is corrupted. */
1576 /* Alpha cc -migrate encodes char and unsigned char types
1577 as short and unsigned short types with a field width of 8.
1578 Enum types also have a field width which we ignore for now. */
1579 if (t
->bt
== btShort
&& width
== 8)
1580 tp
= basic_type (btChar
, mdebugread_objfile
);
1581 else if (t
->bt
== btUShort
&& width
== 8)
1582 tp
= basic_type (btUChar
, mdebugread_objfile
);
1583 else if (t
->bt
== btEnum
)
1586 complaint (_("can't handle TIR fBitfield for %s"),
1594 /* A btIndirect entry cross references to an aux entry containing
1596 if (t
->bt
== btIndirect
)
1603 (*debug_swap
->swap_rndx_in
) (bigend
, &ax
->a_rndx
, rn
);
1605 if (rn
->rfd
== 0xfff)
1607 rf
= AUX_GET_ISYM (bigend
, ax
);
1615 complaint (_("unable to cross ref btIndirect for %s"), sym_name
);
1616 return basic_type (btInt
, mdebugread_objfile
);
1618 xref_fh
= get_rfd (fd
, rf
);
1619 xref_fd
= xref_fh
- debug_info
->fdr
;
1620 tp
= parse_type (xref_fd
, debug_info
->external_aux
+ xref_fh
->iauxBase
,
1621 rn
->index
, NULL
, xref_fh
->fBigendian
, sym_name
);
1624 /* All these types really point to some (common) MIPS type
1625 definition, and only the type-qualifiers fully identify
1626 them. We'll make the same effort at sharing. */
1627 if (t
->bt
== btStruct
||
1631 /* btSet (I think) implies that the name is a tag name, not a typedef
1632 name. This apparently is a MIPS extension for C sets. */
1637 /* Try to cross reference this type, build new type on failure. */
1638 ax
+= cross_ref (fd
, ax
, &tp
, type_code
, &name
, bigend
, sym_name
);
1640 tp
= init_type (mdebugread_objfile
, type_code
, 0, NULL
);
1642 /* DEC c89 produces cross references to qualified aggregate types,
1643 dereference them. */
1644 while (TYPE_CODE (tp
) == TYPE_CODE_PTR
1645 || TYPE_CODE (tp
) == TYPE_CODE_ARRAY
)
1646 tp
= TYPE_TARGET_TYPE (tp
);
1648 /* Make sure that TYPE_CODE(tp) has an expected type code.
1649 Any type may be returned from cross_ref if file indirect entries
1651 if (TYPE_CODE (tp
) != TYPE_CODE_STRUCT
1652 && TYPE_CODE (tp
) != TYPE_CODE_UNION
1653 && TYPE_CODE (tp
) != TYPE_CODE_ENUM
)
1655 unexpected_type_code_complaint (sym_name
);
1659 /* Usually, TYPE_CODE(tp) is already type_code. The main
1660 exception is if we guessed wrong re struct/union/enum.
1661 But for struct vs. union a wrong guess is harmless, so
1662 don't complain(). */
1663 if ((TYPE_CODE (tp
) == TYPE_CODE_ENUM
1664 && type_code
!= TYPE_CODE_ENUM
)
1665 || (TYPE_CODE (tp
) != TYPE_CODE_ENUM
1666 && type_code
== TYPE_CODE_ENUM
))
1668 bad_tag_guess_complaint (sym_name
);
1671 if (TYPE_CODE (tp
) != type_code
)
1673 TYPE_CODE (tp
) = type_code
;
1676 /* Do not set the tag name if it is a compiler generated tag name
1677 (.Fxx or .xxfake or empty) for unnamed struct/union/enums. */
1678 if (name
[0] == '.' || name
[0] == '\0')
1679 TYPE_NAME (tp
) = NULL
;
1680 else if (TYPE_NAME (tp
) == NULL
1681 || strcmp (TYPE_NAME (tp
), name
) != 0)
1683 = obstack_strdup (&mdebugread_objfile
->objfile_obstack
, name
);
1687 /* All these types really point to some (common) MIPS type
1688 definition, and only the type-qualifiers fully identify
1689 them. We'll make the same effort at sharing.
1690 FIXME: We are not doing any guessing on range types. */
1691 if (t
->bt
== btRange
)
1695 /* Try to cross reference this type, build new type on failure. */
1696 ax
+= cross_ref (fd
, ax
, &tp
, type_code
, &name
, bigend
, sym_name
);
1698 tp
= init_type (mdebugread_objfile
, type_code
, 0, NULL
);
1700 /* Make sure that TYPE_CODE(tp) has an expected type code.
1701 Any type may be returned from cross_ref if file indirect entries
1703 if (TYPE_CODE (tp
) != TYPE_CODE_RANGE
)
1705 unexpected_type_code_complaint (sym_name
);
1709 /* Usually, TYPE_CODE(tp) is already type_code. The main
1710 exception is if we guessed wrong re struct/union/enum. */
1711 if (TYPE_CODE (tp
) != type_code
)
1713 bad_tag_guess_complaint (sym_name
);
1714 TYPE_CODE (tp
) = type_code
;
1716 if (TYPE_NAME (tp
) == NULL
1717 || strcmp (TYPE_NAME (tp
), name
) != 0)
1719 = obstack_strdup (&mdebugread_objfile
->objfile_obstack
, name
);
1722 if (t
->bt
== btTypedef
)
1726 /* Try to cross reference this type, it should succeed. */
1727 ax
+= cross_ref (fd
, ax
, &tp
, type_code
, &name
, bigend
, sym_name
);
1730 complaint (_("unable to cross ref btTypedef for %s"), sym_name
);
1731 tp
= basic_type (btInt
, mdebugread_objfile
);
1735 /* Deal with range types. */
1736 if (t
->bt
== btRange
)
1738 TYPE_NFIELDS (tp
) = 0;
1739 TYPE_RANGE_DATA (tp
) = ((struct range_bounds
*)
1740 TYPE_ZALLOC (tp
, sizeof (struct range_bounds
)));
1741 TYPE_LOW_BOUND (tp
) = AUX_GET_DNLOW (bigend
, ax
);
1743 TYPE_HIGH_BOUND (tp
) = AUX_GET_DNHIGH (bigend
, ax
);
1747 /* Parse all the type qualifiers now. If there are more
1748 than 6 the game will continue in the next aux. */
1752 #define PARSE_TQ(tq) \
1753 if (t->tq != tqNil) \
1754 ax += upgrade_type(fd, &tp, t->tq, ax, bigend, sym_name); \
1766 /* mips cc 2.x and gcc never put out continued aux entries. */
1770 (*debug_swap
->swap_tir_in
) (bigend
, &ax
->a_ti
, t
);
1774 /* Complain for illegal continuations due to corrupt aux entries. */
1776 complaint (_("illegal TIR continued for %s"), sym_name
);
1781 /* Make up a complex type from a basic one. Type is passed by
1782 reference in TPP and side-effected as necessary. The type
1783 qualifier TQ says how to handle the aux symbols at AX for
1784 the symbol SX we are currently analyzing. BIGEND says whether
1785 aux symbols are big-endian or little-endian.
1786 Returns the number of aux symbols we parsed. */
1789 upgrade_type (int fd
, struct type
**tpp
, int tq
, union aux_ext
*ax
, int bigend
,
1790 const char *sym_name
)
1795 /* Used in array processing. */
1806 t
= lookup_pointer_type (*tpp
);
1811 t
= lookup_function_type (*tpp
);
1818 /* Determine and record the domain type (type of index). */
1819 (*debug_swap
->swap_rndx_in
) (bigend
, &ax
->a_rndx
, &rndx
);
1825 rf
= AUX_GET_ISYM (bigend
, ax
);
1828 fh
= get_rfd (fd
, rf
);
1830 indx
= parse_type (fh
- debug_info
->fdr
,
1831 debug_info
->external_aux
+ fh
->iauxBase
,
1832 id
, NULL
, bigend
, sym_name
);
1834 /* The bounds type should be an integer type, but might be anything
1835 else due to corrupt aux entries. */
1836 if (TYPE_CODE (indx
) != TYPE_CODE_INT
)
1838 complaint (_("illegal array index type for %s, assuming int"),
1840 indx
= objfile_type (mdebugread_objfile
)->builtin_int
;
1843 /* Get the bounds, and create the array type. */
1845 lower
= AUX_GET_DNLOW (bigend
, ax
);
1847 upper
= AUX_GET_DNHIGH (bigend
, ax
);
1849 rf
= AUX_GET_WIDTH (bigend
, ax
); /* bit size of array element */
1851 range
= create_static_range_type (NULL
, indx
, lower
, upper
);
1853 t
= create_array_type (NULL
, *tpp
, range
);
1855 /* We used to fill in the supplied array element bitsize
1856 here if the TYPE_LENGTH of the target type was zero.
1857 This happens for a `pointer to an array of anonymous structs',
1858 but in this case the array element bitsize is also zero,
1859 so nothing is gained.
1860 And we used to check the TYPE_LENGTH of the target type against
1861 the supplied array element bitsize.
1862 gcc causes a mismatch for `pointer to array of object',
1863 since the sdb directives it uses do not have a way of
1864 specifying the bitsize, but it does no harm (the
1865 TYPE_LENGTH should be correct) and we should be able to
1866 ignore the erroneous bitsize from the auxiliary entry safely.
1867 dbx seems to ignore it too. */
1869 /* TYPE_TARGET_STUB now takes care of the zero TYPE_LENGTH problem. */
1870 if (TYPE_LENGTH (*tpp
) == 0)
1871 TYPE_TARGET_STUB (t
) = 1;
1877 /* Volatile -- currently ignored */
1881 /* Const -- currently ignored */
1885 complaint (_("unknown type qualifier 0x%x"), tq
);
1891 /* Parse a procedure descriptor record PR. Note that the procedure is
1892 parsed _after_ the local symbols, now we just insert the extra
1893 information we need into a MDEBUG_EFI_SYMBOL_NAME symbol that has
1894 already been placed in the procedure's main block. Note also that
1895 images that have been partially stripped (ld -x) have been deprived
1896 of local symbols, and we have to cope with them here. FIRST_OFF is
1897 the offset of the first procedure for this FDR; we adjust the
1898 address by this amount, but I don't know why. SEARCH_SYMTAB is the symtab
1899 to look for the function which contains the MDEBUG_EFI_SYMBOL_NAME symbol
1900 in question, or NULL to use top_stack->cur_block. */
1903 parse_procedure (PDR
*pr
, struct compunit_symtab
*search_symtab
,
1904 legacy_psymtab
*pst
)
1906 struct symbol
*s
, *i
;
1907 const struct block
*b
;
1910 /* Simple rule to find files linked "-x". */
1911 if (cur_fdr
->rss
== -1)
1915 /* Static procedure at address pr->adr. Sigh. */
1916 /* FIXME-32x64. assuming pr->adr fits in long. */
1917 complaint (_("can't handle PDR for static proc at 0x%lx"),
1918 (unsigned long) pr
->adr
);
1926 (*debug_swap
->swap_ext_in
) (cur_bfd
,
1927 ((char *) debug_info
->external_ext
1929 * debug_swap
->external_ext_size
)),
1931 sh_name
= debug_info
->ssext
+ she
.asym
.iss
;
1939 (*debug_swap
->swap_sym_in
) (cur_bfd
,
1940 ((char *) debug_info
->external_sym
1941 + ((cur_fdr
->isymBase
+ pr
->isym
)
1942 * debug_swap
->external_sym_size
)),
1944 sh_name
= debug_info
->ss
+ cur_fdr
->issBase
+ sh
.iss
;
1947 if (search_symtab
!= NULL
)
1950 /* This loses both in the case mentioned (want a static, find a global),
1951 but also if we are looking up a non-mangled name which happens to
1952 match the name of a mangled function. */
1953 /* We have to save the cur_fdr across the call to lookup_symbol.
1954 If the pdr is for a static function and if a global function with
1955 the same name exists, lookup_symbol will eventually read in the symtab
1956 for the global function and clobber cur_fdr. */
1957 FDR
*save_cur_fdr
= cur_fdr
;
1959 s
= lookup_symbol (sh_name
, NULL
, VAR_DOMAIN
, 0);
1960 cur_fdr
= save_cur_fdr
;
1964 BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (search_symtab
),
1971 s
= mylookup_symbol (sh_name
, top_stack
->cur_block
,
1972 VAR_DOMAIN
, LOC_BLOCK
);
1976 b
= SYMBOL_BLOCK_VALUE (s
);
1980 complaint (_("PDR for %s, but no symbol"), sh_name
);
1984 /* FIXME -- delete. We can't do symbol allocation now; it's all done. */
1985 s
= new_symbol (sh_name
);
1986 SYMBOL_DOMAIN (s
) = VAR_DOMAIN
;
1987 SYMBOL_CLASS (s
) = LOC_BLOCK
;
1988 /* Don't know its type, hope int is ok. */
1990 = lookup_function_type (objfile_type (pst
->objfile
)->builtin_int
);
1991 add_symbol (s
, top_stack
->cur_st
, top_stack
->cur_block
);
1992 /* Won't have symbols for this one. */
1994 SYMBOL_BLOCK_VALUE (s
) = b
;
1995 BLOCK_FUNCTION (b
) = s
;
1996 BLOCK_START (b
) = pr
->adr
;
1997 /* BOUND used to be the end of procedure's text, but the
1998 argument is no longer passed in. */
1999 BLOCK_END (b
) = bound
;
2000 BLOCK_SUPERBLOCK (b
) = top_stack
->cur_block
;
2001 add_block (b
, top_stack
->cur_st
);
2005 i
= mylookup_symbol (MDEBUG_EFI_SYMBOL_NAME
, b
, LABEL_DOMAIN
, LOC_CONST
);
2009 struct mdebug_extra_func_info
*e
;
2011 e
= (struct mdebug_extra_func_info
*) SYMBOL_VALUE_BYTES (i
);
2014 /* GDB expects the absolute function start address for the
2015 procedure descriptor in e->pdr.adr.
2016 As the address in the procedure descriptor is usually relative,
2017 we would have to relocate e->pdr.adr with cur_fdr->adr.
2018 Unfortunately cur_fdr->adr and e->pdr.adr are both absolute
2019 in shared libraries on some systems, and on other systems
2020 e->pdr.adr is sometimes offset by a bogus value.
2021 To work around these problems, we replace e->pdr.adr with
2022 the start address of the function. */
2023 e
->pdr
.adr
= BLOCK_START (b
);
2026 /* It would be reasonable that functions that have been compiled
2027 without debugging info have a btNil type for their return value,
2028 and functions that are void and are compiled with debugging info
2030 gcc and DEC f77 put out btNil types for both cases, so btNil is mapped
2031 to TYPE_CODE_VOID in parse_type to get the `compiled with debugging info'
2033 The glevel field in cur_fdr could be used to determine the presence
2034 of debugging info, but GCC doesn't always pass the -g switch settings
2035 to the assembler and GAS doesn't set the glevel field from the -g switch
2037 To work around these problems, the return value type of a TYPE_CODE_VOID
2038 function is adjusted accordingly if no debugging info was found in the
2039 compilation unit. */
2041 if (processing_gcc_compilation
== 0
2042 && found_ecoff_debugging_info
== 0
2043 && TYPE_CODE (TYPE_TARGET_TYPE (SYMBOL_TYPE (s
))) == TYPE_CODE_VOID
)
2044 SYMBOL_TYPE (s
) = objfile_type (mdebugread_objfile
)->nodebug_text_symbol
;
2047 /* Parse the external symbol ES. Just call parse_symbol() after
2048 making sure we know where the aux are for it.
2049 BIGEND says whether aux entries are big-endian or little-endian.
2051 This routine clobbers top_stack->cur_block and ->cur_st. */
2054 parse_external (EXTR
*es
, int bigend
, const section_offsets
§ion_offsets
,
2055 struct objfile
*objfile
)
2059 if (es
->ifd
!= ifdNil
)
2062 cur_fdr
= debug_info
->fdr
+ cur_fd
;
2063 ax
= debug_info
->external_aux
+ cur_fdr
->iauxBase
;
2067 cur_fdr
= debug_info
->fdr
;
2071 /* Reading .o files */
2072 if (SC_IS_UNDEF (es
->asym
.sc
) || es
->asym
.sc
== scNil
)
2075 switch (es
->asym
.st
)
2078 /* These are generated for static symbols in .o files,
2099 /* FIXME: Turn this into a complaint? */
2101 printf_filtered (_("Warning: %s `%s' is undefined (in %s)\n"),
2102 what
, debug_info
->ssext
+ es
->asym
.iss
,
2103 fdr_name (cur_fdr
));
2107 switch (es
->asym
.st
)
2111 /* There is no need to parse the external procedure symbols.
2112 If they are from objects compiled without -g, their index will
2113 be indexNil, and the symbol definition from the minimal symbol
2114 is preferrable (yielding a function returning int instead of int).
2115 If the index points to a local procedure symbol, the local
2116 symbol already provides the correct type.
2117 Note that the index of the external procedure symbol points
2118 to the local procedure symbol in the local symbol table, and
2119 _not_ to the auxiliary symbol info. */
2123 /* Global common symbols are resolved by the runtime loader,
2125 if (SC_IS_COMMON (es
->asym
.sc
))
2128 /* Note that the case of a symbol with indexNil must be handled
2129 anyways by parse_symbol(). */
2130 parse_symbol (&es
->asym
, ax
, NULL
,
2131 bigend
, section_offsets
, objfile
);
2138 /* Parse the line number info for file descriptor FH into
2139 GDB's linetable LT. MIPS' encoding requires a little bit
2140 of magic to get things out. Note also that MIPS' line
2141 numbers can go back and forth, apparently we can live
2142 with that and do not need to reorder our linetables. */
2145 parse_lines (FDR
*fh
, PDR
*pr
, struct linetable
*lt
, int maxlines
,
2146 CORE_ADDR textlow
, CORE_ADDR lowest_pdr_addr
)
2148 unsigned char *base
;
2150 int delta
, count
, lineno
= 0;
2152 if (fh
->cbLine
== 0)
2155 /* Scan by procedure descriptors. */
2157 for (j
= 0; j
< fh
->cpd
; j
++, pr
++)
2161 unsigned char *halt
;
2163 /* No code for this one. */
2164 if (pr
->iline
== ilineNil
||
2165 pr
->lnLow
== -1 || pr
->lnHigh
== -1)
2168 /* Determine start and end address of compressed line bytes for
2170 base
= debug_info
->line
+ fh
->cbLineOffset
;
2171 if (j
!= (fh
->cpd
- 1))
2172 halt
= base
+ pr
[1].cbLineOffset
;
2174 halt
= base
+ fh
->cbLine
;
2175 base
+= pr
->cbLineOffset
;
2177 adr
= textlow
+ pr
->adr
- lowest_pdr_addr
;
2179 l
= adr
>> 2; /* in words */
2180 for (lineno
= pr
->lnLow
; base
< halt
;)
2182 count
= *base
& 0x0f;
2183 delta
= *base
++ >> 4;
2188 delta
= (base
[0] << 8) | base
[1];
2189 if (delta
>= 0x8000)
2193 lineno
+= delta
; /* first delta is 0 */
2195 /* Complain if the line table overflows. Could happen
2196 with corrupt binaries. */
2197 if (lt
->nitems
>= maxlines
)
2199 complaint (_("guessed size of linetable for %s incorrectly"),
2203 k
= add_line (lt
, lineno
, l
, k
);
2210 function_outside_compilation_unit_complaint (const char *arg1
)
2212 complaint (_("function `%s' appears to be defined "
2213 "outside of all compilation units"),
2217 /* Use the STORAGE_CLASS to compute which section the given symbol
2218 belongs to, and then records this new minimal symbol. */
2221 record_minimal_symbol (minimal_symbol_reader
&reader
,
2222 const char *name
, const CORE_ADDR address
,
2223 enum minimal_symbol_type ms_type
, int storage_class
,
2224 struct objfile
*objfile
)
2228 switch (storage_class
)
2231 section
= SECT_OFF_TEXT (objfile
);
2234 section
= SECT_OFF_DATA (objfile
);
2237 section
= SECT_OFF_BSS (objfile
);
2240 section
= get_section_index (objfile
, ".sdata");
2243 section
= get_section_index (objfile
, ".sbss");
2246 section
= get_section_index (objfile
, ".rdata");
2249 section
= get_section_index (objfile
, ".init");
2252 section
= get_section_index (objfile
, ".xdata");
2255 section
= get_section_index (objfile
, ".pdata");
2258 section
= get_section_index (objfile
, ".fini");
2261 section
= get_section_index (objfile
, ".rconst");
2265 section
= get_section_index (objfile
, ".tlsdata");
2270 section
= get_section_index (objfile
, ".tlsbss");
2274 /* This kind of symbol is not associated to a section. */
2278 reader
.record_with_info (name
, address
, ms_type
, section
);
2281 /* Master parsing procedure for first-pass reading of file symbols
2282 into a partial_symtab. */
2285 parse_partial_symbols (minimal_symbol_reader
&reader
,
2286 struct objfile
*objfile
)
2288 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
2289 const bfd_size_type external_sym_size
= debug_swap
->external_sym_size
;
2290 const bfd_size_type external_rfd_size
= debug_swap
->external_rfd_size
;
2291 const bfd_size_type external_ext_size
= debug_swap
->external_ext_size
;
2292 void (*const swap_ext_in
) (bfd
*, void *, EXTR
*) = debug_swap
->swap_ext_in
;
2293 void (*const swap_sym_in
) (bfd
*, void *, SYMR
*) = debug_swap
->swap_sym_in
;
2294 void (*const swap_rfd_in
) (bfd
*, void *, RFDT
*) = debug_swap
->swap_rfd_in
;
2296 HDRR
*hdr
= &debug_info
->symbolic_header
;
2297 /* Running pointers */
2304 legacy_psymtab
*pst
;
2305 int textlow_not_set
= 1;
2307 /* List of current psymtab's include files. */
2308 const char **psymtab_include_list
;
2309 int includes_allocated
;
2312 struct pst_map
*fdr_to_pst
;
2313 /* Index within current psymtab dependency list. */
2314 legacy_psymtab
**dependency_list
;
2315 int dependencies_used
, dependencies_allocated
;
2317 enum language prev_language
;
2318 asection
*text_sect
;
2319 int relocatable
= 0;
2321 /* Irix 5.2 shared libraries have a fh->adr field of zero, but
2322 the shared libraries are prelinked at a high memory address.
2323 We have to adjust the start address of the object file for this case,
2324 by setting it to the start address of the first procedure in the file.
2325 But we should do no adjustments if we are debugging a .o file, where
2326 the text section (and fh->adr) really starts at zero. */
2327 text_sect
= bfd_get_section_by_name (cur_bfd
, ".text");
2328 if (text_sect
!= NULL
2329 && (bfd_section_flags (text_sect
) & SEC_RELOC
))
2332 extern_tab
= XOBNEWVEC (&objfile
->objfile_obstack
, EXTR
, hdr
->iextMax
);
2334 includes_allocated
= 30;
2336 psymtab_include_list
= (const char **) alloca (includes_allocated
*
2337 sizeof (const char *));
2338 next_symbol_text_func
= mdebug_next_symbol_text
;
2340 dependencies_allocated
= 30;
2341 dependencies_used
= 0;
2343 (legacy_psymtab
**) alloca (dependencies_allocated
*
2344 sizeof (legacy_psymtab
*));
2346 set_last_source_file (NULL
);
2351 * Only parse the Local and External symbols, and the Relative FDR.
2352 * Fixup enough of the loader symtab to be able to use it.
2353 * Allocate space only for the file's portions we need to
2358 max_glevel
= MIN_GLEVEL
;
2360 /* Allocate the map FDR -> PST.
2361 Minor hack: -O3 images might claim some global data belongs
2362 to FDR -1. We`ll go along with that. */
2363 gdb::def_vector
<struct pst_map
> fdr_to_pst_holder (hdr
->ifdMax
+ 1);
2364 fdr_to_pst
= fdr_to_pst_holder
.data ();
2367 legacy_psymtab
*new_pst
= new_psymtab ("", objfile
);
2369 fdr_to_pst
[-1].pst
= new_pst
;
2370 FDR_IDX (new_pst
) = -1;
2373 /* Allocate the global pending list. */
2374 pending_list
= XOBNEWVEC (&objfile
->objfile_obstack
, mdebug_pending
*,
2376 memset (pending_list
, 0,
2377 hdr
->ifdMax
* sizeof (struct mdebug_pending
*));
2379 /* Pass 0 over external syms: swap them in. */
2380 gdb::def_vector
<EXTR
> ext_block (hdr
->iextMax
);
2382 ext_out
= (char *) debug_info
->external_ext
;
2383 ext_out_end
= ext_out
+ hdr
->iextMax
* external_ext_size
;
2384 ext_in
= ext_block
.data ();
2385 for (; ext_out
< ext_out_end
; ext_out
+= external_ext_size
, ext_in
++)
2386 (*swap_ext_in
) (cur_bfd
, ext_out
, ext_in
);
2388 /* Pass 1 over external syms: Presize and partition the list. */
2389 ext_in
= ext_block
.data ();
2390 ext_in_end
= ext_in
+ hdr
->iextMax
;
2391 for (; ext_in
< ext_in_end
; ext_in
++)
2393 /* See calls to complain below. */
2394 if (ext_in
->ifd
>= -1
2395 && ext_in
->ifd
< hdr
->ifdMax
2396 && ext_in
->asym
.iss
>= 0
2397 && ext_in
->asym
.iss
< hdr
->issExtMax
)
2398 fdr_to_pst
[ext_in
->ifd
].n_globals
++;
2401 /* Pass 1.5 over files: partition out global symbol space. */
2403 for (f_idx
= -1; f_idx
< hdr
->ifdMax
; f_idx
++)
2405 fdr_to_pst
[f_idx
].globals_offset
= s_idx
;
2406 s_idx
+= fdr_to_pst
[f_idx
].n_globals
;
2407 fdr_to_pst
[f_idx
].n_globals
= 0;
2412 For ECOFF in ELF, we skip the creation of the minimal symbols.
2413 The ECOFF symbols should be a subset of the Elf symbols, and the
2414 section information of the elf symbols will be more accurate.
2415 FIXME! What about Irix 5's native linker?
2417 By default, Elf sections which don't exist in ECOFF
2418 get put in ECOFF's absolute section by the gnu linker.
2419 Since absolute sections don't get relocated, we
2420 end up calculating an address different from that of
2421 the symbol's minimal symbol (created earlier from the
2424 To fix this, either :
2425 1) don't create the duplicate symbol
2426 (assumes ECOFF symtab is a subset of the ELF symtab;
2427 assumes no side-effects result from ignoring ECOFF symbol)
2428 2) create it, only if lookup for existing symbol in ELF's minimal
2431 assumes no side-effects result from ignoring ECOFF symbol)
2432 3) create it, but lookup ELF's minimal symbol and use it's section
2433 during relocation, then modify "uniquify" phase to merge and
2434 eliminate the duplicate symbol
2435 (highly inefficient)
2437 I've implemented #1 here...
2438 Skip the creation of the minimal symbols based on the ECOFF
2441 /* Pass 2 over external syms: fill in external symbols. */
2442 ext_in
= ext_block
.data ();
2443 ext_in_end
= ext_in
+ hdr
->iextMax
;
2444 for (; ext_in
< ext_in_end
; ext_in
++)
2446 enum minimal_symbol_type ms_type
= mst_text
;
2447 CORE_ADDR svalue
= ext_in
->asym
.value
;
2449 /* The Irix 5 native tools seem to sometimes generate bogus
2450 external symbols. */
2451 if (ext_in
->ifd
< -1 || ext_in
->ifd
>= hdr
->ifdMax
)
2453 complaint (_("bad ifd for external symbol: %d (max %ld)"),
2454 ext_in
->ifd
, hdr
->ifdMax
);
2457 if (ext_in
->asym
.iss
< 0 || ext_in
->asym
.iss
>= hdr
->issExtMax
)
2459 complaint (_("bad iss for external symbol: %ld (max %ld)"),
2460 ext_in
->asym
.iss
, hdr
->issExtMax
);
2464 extern_tab
[fdr_to_pst
[ext_in
->ifd
].globals_offset
2465 + fdr_to_pst
[ext_in
->ifd
].n_globals
++] = *ext_in
;
2468 if (SC_IS_UNDEF (ext_in
->asym
.sc
) || ext_in
->asym
.sc
== scNil
)
2472 /* Pass 3 over files, over local syms: fill in static symbols. */
2473 name
= debug_info
->ssext
+ ext_in
->asym
.iss
;
2475 /* Process ECOFF Symbol Types and Storage Classes. */
2476 switch (ext_in
->asym
.st
)
2479 /* Beginnning of Procedure */
2482 /* Load time only static procs */
2483 ms_type
= mst_file_text
;
2486 /* External symbol */
2487 if (SC_IS_COMMON (ext_in
->asym
.sc
))
2489 /* The value of a common symbol is its size, not its address.
2493 else if (SC_IS_DATA (ext_in
->asym
.sc
))
2497 else if (SC_IS_BSS (ext_in
->asym
.sc
))
2501 else if (SC_IS_SBSS (ext_in
->asym
.sc
))
2511 /* On certain platforms, some extra label symbols can be
2512 generated by the linker. One possible usage for this kind
2513 of symbols is to represent the address of the begining of a
2514 given section. For instance, on Tru64 5.1, the address of
2515 the _ftext label is the start address of the .text section.
2517 The storage class of these symbols is usually directly
2518 related to the section to which the symbol refers. For
2519 instance, on Tru64 5.1, the storage class for the _fdata
2520 label is scData, refering to the .data section.
2522 It is actually possible that the section associated to the
2523 storage class of the label does not exist. On True64 5.1
2524 for instance, the libm.so shared library does not contain
2525 any .data section, although it contains a _fpdata label
2526 which storage class is scData... Since these symbols are
2527 usually useless for the debugger user anyway, we just
2528 discard these symbols. */
2530 if (SC_IS_TEXT (ext_in
->asym
.sc
))
2532 if (objfile
->sect_index_text
== -1)
2535 ms_type
= mst_file_text
;
2537 else if (SC_IS_DATA (ext_in
->asym
.sc
))
2539 if (objfile
->sect_index_data
== -1)
2542 ms_type
= mst_file_data
;
2544 else if (SC_IS_BSS (ext_in
->asym
.sc
))
2546 if (objfile
->sect_index_bss
== -1)
2549 ms_type
= mst_file_bss
;
2551 else if (SC_IS_SBSS (ext_in
->asym
.sc
))
2553 const int sbss_sect_index
= get_section_index (objfile
, ".sbss");
2555 if (sbss_sect_index
== -1)
2558 ms_type
= mst_file_bss
;
2565 /* The alpha has the section start addresses in stLocal symbols
2566 whose name starts with a `.'. Skip those but complain for all
2567 other stLocal symbols.
2568 Irix6 puts the section start addresses in stNil symbols, skip
2574 ms_type
= mst_unknown
;
2575 unknown_ext_complaint (name
);
2577 if (!ECOFF_IN_ELF (cur_bfd
))
2578 record_minimal_symbol (reader
, name
, svalue
, ms_type
, ext_in
->asym
.sc
,
2582 /* Pass 3 over files, over local syms: fill in static symbols. */
2583 for (f_idx
= 0; f_idx
< hdr
->ifdMax
; f_idx
++)
2585 legacy_psymtab
*save_pst
;
2589 cur_fdr
= fh
= debug_info
->fdr
+ f_idx
;
2593 fdr_to_pst
[f_idx
].pst
= NULL
;
2597 /* Determine the start address for this object file from the
2598 file header and relocate it, except for Irix 5.2 zero fh->adr. */
2603 pst
= new legacy_psymtab (fdr_name (fh
), objfile
, textlow
);
2604 pst
->read_symtab_private
= XOBNEW (&objfile
->objfile_obstack
, symloc
);
2605 memset (pst
->read_symtab_private
, 0, sizeof (struct symloc
));
2608 FDR_IDX (pst
) = f_idx
;
2609 CUR_BFD (pst
) = cur_bfd
;
2610 DEBUG_SWAP (pst
) = debug_swap
;
2611 DEBUG_INFO (pst
) = debug_info
;
2612 PENDING_LIST (pst
) = pending_list
;
2614 /* The way to turn this into a symtab is to call... */
2615 pst
->legacy_read_symtab
= mdebug_read_symtab
;
2617 /* Set up language for the pst.
2618 The language from the FDR is used if it is unambigious (e.g. cfront
2619 with native cc and g++ will set the language to C).
2620 Otherwise we have to deduce the language from the filename.
2621 Native ecoff has every header file in a separate FDR, so
2622 deduce_language_from_filename will return language_unknown for
2623 a header file, which is not what we want.
2624 But the FDRs for the header files are after the FDR for the source
2625 file, so we can assign the language of the source file to the
2626 following header files. Then we save the language in the private
2627 pst data so that we can reuse it when building symtabs. */
2628 prev_language
= psymtab_language
;
2632 case langCplusplusV2
:
2633 psymtab_language
= language_cplus
;
2636 psymtab_language
= deduce_language_from_filename (fdr_name (fh
));
2639 if (psymtab_language
== language_unknown
)
2640 psymtab_language
= prev_language
;
2641 PST_PRIVATE (pst
)->pst_language
= psymtab_language
;
2643 pst
->set_text_high (pst
->raw_text_low ());
2645 /* For stabs-in-ecoff files, the second symbol must be @stab.
2646 This symbol is emitted by mips-tfile to signal that the
2647 current object file uses encapsulated stabs instead of mips
2648 ecoff for local symbols. (It is the second symbol because
2649 the first symbol is the stFile used to signal the start of a
2651 processing_gcc_compilation
= 0;
2654 (*swap_sym_in
) (cur_bfd
,
2655 ((char *) debug_info
->external_sym
2656 + (fh
->isymBase
+ 1) * external_sym_size
),
2658 if (strcmp (debug_info
->ss
+ fh
->issBase
+ sh
.iss
,
2660 processing_gcc_compilation
= 2;
2663 if (processing_gcc_compilation
!= 0)
2665 for (cur_sdx
= 2; cur_sdx
< fh
->csym
; cur_sdx
++)
2668 const char *namestring
;
2670 (*swap_sym_in
) (cur_bfd
,
2671 (((char *) debug_info
->external_sym
)
2672 + (fh
->isymBase
+ cur_sdx
) * external_sym_size
),
2674 type_code
= ECOFF_UNMARK_STAB (sh
.index
);
2675 if (!ECOFF_IS_STAB (&sh
))
2677 if (sh
.st
== stProc
|| sh
.st
== stStaticProc
)
2682 if (sh
.st
== stStaticProc
)
2684 namestring
= debug_info
->ss
+ fh
->issBase
+ sh
.iss
;
2685 record_minimal_symbol (reader
, namestring
, sh
.value
,
2686 mst_file_text
, sh
.sc
,
2689 procaddr
= sh
.value
;
2691 isym
= AUX_GET_ISYM (fh
->fBigendian
,
2692 (debug_info
->external_aux
2695 (*swap_sym_in
) (cur_bfd
,
2696 ((char *) debug_info
->external_sym
2697 + ((fh
->isymBase
+ isym
- 1)
2698 * external_sym_size
)),
2702 CORE_ADDR high
= procaddr
+ sh
.value
;
2704 /* Kludge for Irix 5.2 zero fh->adr. */
2706 && (!pst
->text_low_valid
2707 || procaddr
< pst
->raw_text_low ()))
2708 pst
->set_text_low (procaddr
);
2709 if (high
> pst
->raw_text_high ())
2710 pst
->set_text_high (high
);
2713 else if (sh
.st
== stStatic
)
2728 namestring
= debug_info
->ss
+ fh
->issBase
+ sh
.iss
;
2729 record_minimal_symbol (reader
, namestring
, sh
.value
,
2730 mst_file_data
, sh
.sc
,
2735 /* FIXME! Shouldn't this use cases for bss,
2736 then have the default be abs? */
2737 namestring
= debug_info
->ss
+ fh
->issBase
+ sh
.iss
;
2738 record_minimal_symbol (reader
, namestring
, sh
.value
,
2739 mst_file_bss
, sh
.sc
,
2746 /* Handle stabs continuation. */
2748 char *stabstring
= debug_info
->ss
+ fh
->issBase
+ sh
.iss
;
2749 /* If we need to heap-allocate STABSTRING, this owns
2751 gdb::unique_xmalloc_ptr
<char> stabstring_storage
;
2752 int len
= strlen (stabstring
);
2754 while (stabstring
[len
- 1] == '\\')
2757 char *stabstring1
= stabstring
;
2761 /* Ignore continuation char from 1st string. */
2764 /* Read next stabstring. */
2766 (*swap_sym_in
) (cur_bfd
,
2767 (((char *) debug_info
->external_sym
)
2768 + (fh
->isymBase
+ cur_sdx
)
2769 * external_sym_size
),
2771 stabstring2
= debug_info
->ss
+ fh
->issBase
+ sh2
.iss
;
2772 len2
= strlen (stabstring2
);
2774 /* Concatenate stabstring2 with stabstring1. */
2775 if (stabstring_storage
!= nullptr)
2777 stabstring_storage
.reset
2778 ((char *) xrealloc (stabstring_storage
.release (),
2780 stabstring
= stabstring_storage
.get ();
2784 stabstring_storage
.reset
2785 ((char *) xmalloc (len
+ len2
+ 1));
2786 stabstring
= stabstring_storage
.get ();
2787 strcpy (stabstring
, stabstring1
);
2789 strcpy (stabstring
+ len
, stabstring2
);
2797 /* Standard, external, non-debugger, symbols. */
2799 case N_TEXT
| N_EXT
:
2800 case N_NBTEXT
| N_EXT
:
2803 case N_DATA
| N_EXT
:
2804 case N_NBDATA
| N_EXT
:
2809 case N_NBBSS
| N_EXT
:
2810 case N_SETV
| N_EXT
: /* FIXME, is this in BSS? */
2817 /* Standard, local, non-debugger, symbols. */
2821 /* We need to be able to deal with both N_FN or
2822 N_TEXT, because we have no way of knowing
2823 whether the sys-supplied ld or GNU ld was used
2824 to make the executable. Sequents throw in
2825 another wrinkle -- they renumbered N_FN. */
2835 case N_UNDF
| N_EXT
:
2836 continue; /* Just undefined, not COMMON. */
2841 /* Lots of symbol types we can just ignore. */
2848 /* Keep going . . . */
2851 * Special symbol types for GNU
2854 case N_INDR
| N_EXT
:
2856 case N_SETA
| N_EXT
:
2858 case N_SETT
| N_EXT
:
2860 case N_SETD
| N_EXT
:
2862 case N_SETB
| N_EXT
:
2872 static int prev_so_symnum
= -10;
2873 const char *basename
;
2875 /* A zero value is probably an indication for the
2876 SunPRO 3.0 compiler. dbx_end_psymtab explicitly tests
2877 for zero, so don't relocate it. */
2880 && gdbarch_sofun_address_maybe_missing (gdbarch
))
2881 textlow_not_set
= 1;
2883 textlow_not_set
= 0;
2885 if (prev_so_symnum
!= symnum
- 1)
2886 { /* Here if prev stab wasn't N_SO. */
2889 pst
= (legacy_psymtab
*) 0;
2891 dependencies_used
= 0;
2895 prev_so_symnum
= symnum
;
2897 /* End the current partial symtab and start a
2900 /* SET_NAMESTRING ();*/
2901 namestring
= stabstring
;
2903 /* Null name means end of .o file. Don't start a new
2905 if (*namestring
== '\000')
2908 /* Some compilers (including gcc) emit a pair of
2909 initial N_SOs. The first one is a directory name;
2910 the second the file name. If pst exists, is
2911 empty, and has a filename ending in '/', we assume
2912 the previous N_SO was a directory name. */
2913 basename
= lbasename (namestring
);
2914 if (basename
!= namestring
&& *basename
== '\000')
2915 continue; /* Simply ignore directory
2918 /* Some other compilers (C++ ones in particular) emit
2919 useless SOs for non-existant .c files. We ignore
2920 all subsequent SOs that immediately follow the
2933 enum language tmp_language
;
2935 /* Mark down an include file in the current psymtab. */
2937 /* SET_NAMESTRING (); */
2938 namestring
= stabstring
;
2941 = deduce_language_from_filename (namestring
);
2943 /* Only change the psymtab's language if we've
2944 learned something useful (eg. tmp_language is not
2945 language_unknown). In addition, to match what
2946 start_subfile does, never change from C++ to
2948 if (tmp_language
!= language_unknown
2949 && (tmp_language
!= language_c
2950 || psymtab_language
!= language_cplus
))
2951 psymtab_language
= tmp_language
;
2953 /* In C++, one may expect the same filename to come
2954 round many times, when code is coming alternately
2955 from the main file and from inline functions in
2956 other files. So I check to see if this is a file
2957 we've seen before -- either the main source file,
2958 or a previously included file.
2960 This seems to be a lot of time to be spending on
2961 N_SOL, but things like "break c-exp.y:435" need to
2962 work (I suppose the psymtab_include_list could be
2963 hashed or put in a binary tree, if profiling shows
2964 this is a major hog). */
2965 if (pst
&& filename_cmp (namestring
, pst
->filename
) == 0)
2971 for (i
= 0; i
< includes_used
; i
++)
2972 if (filename_cmp (namestring
,
2973 psymtab_include_list
[i
]) == 0)
2982 psymtab_include_list
[includes_used
++] = namestring
;
2983 if (includes_used
>= includes_allocated
)
2985 const char **orig
= psymtab_include_list
;
2987 psymtab_include_list
= (const char **)
2988 alloca ((includes_allocated
*= 2) *
2989 sizeof (const char *));
2990 memcpy (psymtab_include_list
, orig
,
2991 includes_used
* sizeof (const char *));
2995 case N_LSYM
: /* Typedef or automatic variable. */
2996 case N_STSYM
: /* Data seg var -- static */
2997 case N_LCSYM
: /* BSS " */
2998 case N_ROSYM
: /* Read-only data seg var -- static. */
2999 case N_NBSTS
: /* Gould nobase. */
3000 case N_NBLCS
: /* symbols. */
3002 case N_GSYM
: /* Global (extern) variable; can be
3003 data or bss (sigh FIXME). */
3005 /* Following may probably be ignored; I'll leave them here
3006 for now (until I do Pascal and Modula 2 extensions). */
3008 case N_PC
: /* I may or may not need this; I
3010 case N_M2C
: /* I suspect that I can ignore this
3012 case N_SCOPE
: /* Same. */
3014 /* SET_NAMESTRING (); */
3015 namestring
= stabstring
;
3016 p
= (char *) strchr (namestring
, ':');
3018 continue; /* Not a debugging symbol. */
3022 /* Main processing section for debugging symbols which
3023 the initial read through the symbol tables needs to
3024 worry about. If we reach this point, the symbol
3025 which we are considering is definitely one we are
3026 interested in. p must also contain the (valid)
3027 index into the namestring which indicates the
3028 debugging type symbol. */
3033 if (gdbarch_static_transform_name_p (gdbarch
))
3034 namestring
= gdbarch_static_transform_name
3035 (gdbarch
, namestring
);
3037 add_psymbol_to_list (gdb::string_view (namestring
,
3039 true, VAR_DOMAIN
, LOC_STATIC
,
3040 SECT_OFF_DATA (objfile
),
3041 psymbol_placement::STATIC
,
3043 psymtab_language
, objfile
);
3046 /* The addresses in these entries are reported
3047 to be wrong. See the code that reads 'G's
3049 add_psymbol_to_list (gdb::string_view (namestring
,
3051 true, VAR_DOMAIN
, LOC_STATIC
,
3052 SECT_OFF_DATA (objfile
),
3053 psymbol_placement::GLOBAL
,
3055 psymtab_language
, objfile
);
3059 /* When a 'T' entry is defining an anonymous enum, it
3060 may have a name which is the empty string, or a
3061 single space. Since they're not really defining a
3062 symbol, those shouldn't go in the partial symbol
3063 table. We do pick up the elements of such enums at
3064 'check_enum:', below. */
3065 if (p
>= namestring
+ 2
3066 || (p
== namestring
+ 1
3067 && namestring
[0] != ' '))
3070 (gdb::string_view (namestring
, p
- namestring
),
3071 true, STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
3072 psymbol_placement::STATIC
, 0, psymtab_language
,
3076 /* Also a typedef with the same name. */
3078 (gdb::string_view (namestring
,
3080 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
3081 psymbol_placement::STATIC
, 0,
3082 psymtab_language
, objfile
);
3088 if (p
!= namestring
) /* a name is there, not
3092 (gdb::string_view (namestring
,
3094 true, VAR_DOMAIN
, LOC_TYPEDEF
, -1,
3095 psymbol_placement::STATIC
, 0, psymtab_language
,
3099 /* If this is an enumerated type, we need to add
3100 all the enum constants to the partial symbol
3101 table. This does not cover enums without names,
3102 e.g. "enum {a, b} c;" in C, but fortunately
3103 those are rare. There is no way for GDB to find
3104 those from the enum type without spending too
3105 much time on it. Thus to solve this problem,
3106 the compiler needs to put out the enum in a
3107 nameless type. GCC2 does this. */
3109 /* We are looking for something of the form
3110 <name> ":" ("t" | "T") [<number> "="] "e"
3111 {<constant> ":" <value> ","} ";". */
3113 /* Skip over the colon and the 't' or 'T'. */
3115 /* This type may be given a number. Also, numbers
3116 can come in pairs like (0,26). Skip over it. */
3117 while ((*p
>= '0' && *p
<= '9')
3118 || *p
== '(' || *p
== ',' || *p
== ')'
3124 /* The aix4 compiler emits extra crud before
3128 /* Skip over the type (?). */
3132 /* Skip over the colon. */
3136 /* We have found an enumerated type. */
3137 /* According to comments in read_enum_type
3138 a comma could end it instead of a semicolon.
3139 I don't know where that happens.
3141 while (*p
&& *p
!= ';' && *p
!= ',')
3145 /* Check for and handle cretinous dbx
3146 symbol name continuation! */
3147 if (*p
== '\\' || (*p
== '?' && p
[1] == '\0'))
3148 p
= next_symbol_text (objfile
);
3150 /* Point to the character after the name
3151 of the enum constant. */
3152 for (q
= p
; *q
&& *q
!= ':'; q
++)
3154 /* Note that the value doesn't matter for
3155 enum constants in psymtabs, just in
3157 add_psymbol_to_list (gdb::string_view (p
,
3161 psymbol_placement::STATIC
,
3162 0, psymtab_language
,
3164 /* Point past the name. */
3166 /* Skip over the value. */
3167 while (*p
&& *p
!= ',')
3169 /* Advance past the comma. */
3176 /* Constant, e.g. from "const" in Pascal. */
3177 add_psymbol_to_list (gdb::string_view (namestring
,
3179 true, VAR_DOMAIN
, LOC_CONST
, -1,
3180 psymbol_placement::STATIC
,
3181 0, psymtab_language
, objfile
);
3187 std::string
copy (namestring
, p
);
3188 function_outside_compilation_unit_complaint
3191 add_psymbol_to_list (gdb::string_view (namestring
,
3193 true, VAR_DOMAIN
, LOC_BLOCK
,
3194 SECT_OFF_TEXT (objfile
),
3195 psymbol_placement::STATIC
,
3197 psymtab_language
, objfile
);
3200 /* Global functions were ignored here, but now they
3201 are put into the global psymtab like one would
3202 expect. They're also in the minimal symbol
3207 std::string
copy (namestring
, p
);
3208 function_outside_compilation_unit_complaint
3211 add_psymbol_to_list (gdb::string_view (namestring
,
3213 true, VAR_DOMAIN
, LOC_BLOCK
,
3214 SECT_OFF_TEXT (objfile
),
3215 psymbol_placement::GLOBAL
,
3217 psymtab_language
, objfile
);
3220 /* Two things show up here (hopefully); static
3221 symbols of local scope (static used inside
3222 braces) or extensions of structure symbols. We
3237 case '#': /* For symbol identification (used
3242 /* It is a C++ nested symbol. We don't need to
3243 record it (I don't think); if we try to look up
3244 foo::bar::baz, then symbols for the symtab
3245 containing foo should get read in, I think. */
3246 /* Someone says sun cc puts out symbols like
3247 /foo/baz/maclib::/usr/local/bin/maclib,
3248 which would get here with a symbol type of ':'. */
3252 /* Unexpected symbol descriptor. The second and
3253 subsequent stabs of a continued stab can show up
3254 here. The question is whether they ever can
3255 mimic a normal stab--it would be nice if not,
3256 since we certainly don't want to spend the time
3257 searching to the end of every string looking for
3260 complaint (_("unknown symbol descriptor `%c'"), p
[1]);
3262 /* Ignore it; perhaps it is an extension that we don't
3271 /* Solaris 2 end of module, finish current partial
3272 symbol table. dbx_end_psymtab will set the
3273 high text address of PST to the proper value,
3274 which is necessary if a module compiled without
3275 debugging info follows this module. */
3277 && gdbarch_sofun_address_maybe_missing (gdbarch
))
3279 pst
= (legacy_psymtab
*) 0;
3281 dependencies_used
= 0;
3286 if (sh
.value
> save_pst
->raw_text_high ())
3287 save_pst
->set_text_high (sh
.value
);
3292 case N_SSYM
: /* Claim: Structure or union
3293 element. Hopefully, I can
3295 case N_ENTRY
: /* Alternate entry point; can
3297 case N_MAIN
: /* Can definitely ignore this. */
3298 case N_CATCH
: /* These are GNU C++ extensions. */
3299 case N_EHDECL
: /* that can safely be ignored here. */
3309 case N_NSYMS
: /* Ultrix 4.0: symbol count */
3310 case N_DEFD
: /* GNU Modula-2 */
3311 case N_ALIAS
: /* SunPro F77: alias name, ignore
3314 case N_OBJ
: /* Useless types from Solaris. */
3316 /* These symbols aren't interesting; don't worry about
3322 /* If we haven't found it yet, ignore it. It's
3323 probably some new type we don't know about yet. */
3324 complaint (_("unknown symbol type %s"),
3325 hex_string (type_code
)); /* CUR_SYMBOL_TYPE */
3329 /* end - Handle continuation */
3334 for (cur_sdx
= 0; cur_sdx
< fh
->csym
;)
3337 enum address_class theclass
;
3338 CORE_ADDR minsym_value
;
3341 (*swap_sym_in
) (cur_bfd
,
3342 ((char *) debug_info
->external_sym
3343 + ((fh
->isymBase
+ cur_sdx
)
3344 * external_sym_size
)),
3347 if (ECOFF_IS_STAB (&sh
))
3353 /* Non absolute static symbols go into the minimal table. */
3354 if (SC_IS_UNDEF (sh
.sc
) || sh
.sc
== scNil
3355 || (sh
.index
== indexNil
3356 && (sh
.st
!= stStatic
|| sh
.sc
== scAbs
)))
3358 /* FIXME, premature? */
3363 sym_name
= debug_info
->ss
+ fh
->issBase
+ sh
.iss
;
3365 minsym_value
= sh
.value
;
3371 /* The value of a stEnd symbol is the displacement from the
3372 corresponding start symbol value, do not relocate it. */
3374 section
= SECT_OFF_TEXT (objfile
);
3381 section
= SECT_OFF_DATA (objfile
);
3385 section
= SECT_OFF_BSS (objfile
);
3396 reader
.record_with_info (sym_name
, minsym_value
,
3398 SECT_OFF_TEXT (objfile
));
3403 /* Ignore all parameter symbol records. */
3404 if (sh
.index
>= hdr
->iauxMax
)
3406 /* Should not happen, but does when cross-compiling
3407 with the MIPS compiler. FIXME -- pull later. */
3408 index_complaint (sym_name
);
3409 new_sdx
= cur_sdx
+ 1; /* Don't skip at all. */
3412 new_sdx
= AUX_GET_ISYM (fh
->fBigendian
,
3413 (debug_info
->external_aux
3417 if (new_sdx
<= cur_sdx
)
3419 /* This should not happen either... FIXME. */
3420 complaint (_("bad proc end in aux found from symbol %s"),
3422 new_sdx
= cur_sdx
+ 1; /* Don't skip backward. */
3425 /* For stProc symbol records, we need to check the
3426 storage class as well, as only (stProc, scText)
3427 entries represent "real" procedures - See the
3428 Compaq document titled "Object File / Symbol Table
3429 Format Specification" for more information. If the
3430 storage class is not scText, we discard the whole
3431 block of symbol records for this stProc. */
3432 if (sh
.st
== stProc
&& sh
.sc
!= scText
)
3435 /* Usually there is a local and a global stProc symbol
3436 for a function. This means that the function name
3437 has already been entered into the minimal symbol table
3438 while processing the global symbols in pass 2 above.
3439 One notable exception is the PROGRAM name from
3440 f77 compiled executables, it is only put out as
3441 local stProc symbol, and a global MAIN__ stProc symbol
3442 points to it. It doesn't matter though, as gdb is
3443 still able to find the PROGRAM name via the partial
3444 symbol table, and the MAIN__ symbol via the minimal
3446 if (sh
.st
== stProc
)
3447 add_psymbol_to_list (sym_name
, true,
3448 VAR_DOMAIN
, LOC_BLOCK
,
3450 psymbol_placement::GLOBAL
,
3451 sh
.value
, psymtab_language
, objfile
);
3453 add_psymbol_to_list (sym_name
, true,
3454 VAR_DOMAIN
, LOC_BLOCK
,
3456 psymbol_placement::STATIC
,
3457 sh
.value
, psymtab_language
, objfile
);
3459 procaddr
= sh
.value
;
3462 (*swap_sym_in
) (cur_bfd
,
3463 ((char *) debug_info
->external_sym
3464 + ((fh
->isymBase
+ cur_sdx
- 1)
3465 * external_sym_size
)),
3470 /* Kludge for Irix 5.2 zero fh->adr. */
3472 && (!pst
->text_low_valid
3473 || procaddr
< pst
->raw_text_low ()))
3474 pst
->set_text_low (procaddr
);
3476 high
= procaddr
+ sh
.value
;
3477 if (high
> pst
->raw_text_high ())
3478 pst
->set_text_high (high
);
3481 case stStatic
: /* Variable */
3482 if (SC_IS_DATA (sh
.sc
))
3483 reader
.record_with_info (sym_name
, minsym_value
,
3485 SECT_OFF_DATA (objfile
));
3487 reader
.record_with_info (sym_name
, minsym_value
,
3489 SECT_OFF_BSS (objfile
));
3490 theclass
= LOC_STATIC
;
3493 case stIndirect
: /* Irix5 forward declaration */
3494 /* Skip forward declarations from Irix5 cc. */
3497 case stTypedef
: /* Typedef */
3498 /* Skip typedefs for forward declarations and opaque
3499 structs from alpha and mips cc. */
3500 if (sh
.iss
== 0 || has_opaque_xref (fh
, &sh
))
3502 theclass
= LOC_TYPEDEF
;
3505 case stConstant
: /* Constant decl */
3506 theclass
= LOC_CONST
;
3512 case stBlock
: /* { }, str, un, enum */
3513 /* Do not create a partial symbol for cc unnamed aggregates
3514 and gcc empty aggregates. */
3515 if ((sh
.sc
== scInfo
3516 || SC_IS_COMMON (sh
.sc
))
3518 && sh
.index
!= cur_sdx
+ 2)
3520 add_psymbol_to_list (sym_name
, true,
3521 STRUCT_DOMAIN
, LOC_TYPEDEF
, -1,
3522 psymbol_placement::STATIC
,
3523 0, psymtab_language
, objfile
);
3525 handle_psymbol_enumerators (objfile
, fh
, sh
.st
, sh
.value
);
3527 /* Skip over the block. */
3529 if (new_sdx
<= cur_sdx
)
3531 /* This happens with the Ultrix kernel. */
3532 complaint (_("bad aux index at block symbol %s"),
3534 new_sdx
= cur_sdx
+ 1; /* Don't skip backward. */
3539 case stFile
: /* File headers */
3540 case stLabel
: /* Labels */
3541 case stEnd
: /* Ends of files */
3544 case stLocal
: /* Local variables */
3545 /* Normally these are skipped because we skip over
3546 all blocks we see. However, these can occur
3547 as visible symbols in a .h file that contains code. */
3551 /* Both complaints are valid: one gives symbol sym_name,
3552 the other the offending symbol type. */
3553 complaint (_("unknown local symbol %s"),
3555 complaint (_("with type %d"), sh
.st
);
3559 /* Use this gdb symbol. */
3560 add_psymbol_to_list (sym_name
, true,
3561 VAR_DOMAIN
, theclass
, section
,
3562 psymbol_placement::STATIC
,
3563 sh
.value
, psymtab_language
, objfile
);
3565 cur_sdx
++; /* Go to next file symbol. */
3568 /* Now do enter the external symbols. */
3569 ext_ptr
= &extern_tab
[fdr_to_pst
[f_idx
].globals_offset
];
3570 cur_sdx
= fdr_to_pst
[f_idx
].n_globals
;
3571 PST_PRIVATE (save_pst
)->extern_count
= cur_sdx
;
3572 PST_PRIVATE (save_pst
)->extern_tab
= ext_ptr
;
3573 for (; --cur_sdx
>= 0; ext_ptr
++)
3575 enum address_class theclass
;
3580 if (ext_ptr
->ifd
!= f_idx
)
3581 internal_error (__FILE__
, __LINE__
,
3582 _("failed internal consistency check"));
3583 psh
= &ext_ptr
->asym
;
3585 /* Do not add undefined symbols to the partial symbol table. */
3586 if (SC_IS_UNDEF (psh
->sc
) || psh
->sc
== scNil
)
3589 svalue
= psh
->value
;
3595 section
= SECT_OFF_TEXT (objfile
);
3602 section
= SECT_OFF_DATA (objfile
);
3606 section
= SECT_OFF_BSS (objfile
);
3613 /* These are generated for static symbols in .o files,
3618 /* External procedure symbols have been entered
3619 into the minimal symbol table in pass 2 above.
3620 Ignore them, as parse_external will ignore them too. */
3623 theclass
= LOC_LABEL
;
3626 unknown_ext_complaint (debug_info
->ssext
+ psh
->iss
);
3627 /* Pretend it's global. */
3630 /* Global common symbols are resolved by the runtime loader,
3632 if (SC_IS_COMMON (psh
->sc
))
3635 theclass
= LOC_STATIC
;
3638 char *sym_name
= debug_info
->ssext
+ psh
->iss
;
3639 add_psymbol_to_list (sym_name
, true,
3640 VAR_DOMAIN
, theclass
,
3642 psymbol_placement::GLOBAL
,
3643 svalue
, psymtab_language
, objfile
);
3647 /* Link pst to FDR. dbx_end_psymtab returns NULL if the psymtab was
3648 empty and put on the free list. */
3649 fdr_to_pst
[f_idx
].pst
3650 = dbx_end_psymtab (objfile
, save_pst
,
3651 psymtab_include_list
, includes_used
,
3652 -1, save_pst
->raw_text_high (),
3653 dependency_list
, dependencies_used
,
3656 dependencies_used
= 0;
3658 /* The objfile has its functions reordered if this partial symbol
3659 table overlaps any other partial symbol table.
3660 We cannot assume a reordered objfile if a partial symbol table
3661 is contained within another partial symbol table, as partial symbol
3662 tables for include files with executable code are contained
3663 within the partial symbol table for the including source file,
3664 and we do not want to flag the objfile reordered for these cases.
3666 This strategy works well for Irix-5.2 shared libraries, but we
3667 might have to use a more elaborate (and slower) algorithm for
3669 save_pst
= fdr_to_pst
[f_idx
].pst
;
3670 if (save_pst
!= NULL
3671 && save_pst
->text_low_valid
3672 && !(objfile
->flags
& OBJF_REORDERED
))
3674 for (partial_symtab
*iter
: objfile
->psymtabs ())
3676 if (save_pst
!= iter
3677 && save_pst
->raw_text_low () >= iter
->raw_text_low ()
3678 && save_pst
->raw_text_low () < iter
->raw_text_high ()
3679 && save_pst
->raw_text_high () > iter
->raw_text_high ())
3681 objfile
->flags
|= OBJF_REORDERED
;
3688 /* Now scan the FDRs for dependencies. */
3689 for (f_idx
= 0; f_idx
< hdr
->ifdMax
; f_idx
++)
3691 fh
= f_idx
+ debug_info
->fdr
;
3692 pst
= fdr_to_pst
[f_idx
].pst
;
3697 /* This should catch stabs-in-ecoff. */
3701 /* Skip the first file indirect entry as it is a self dependency for
3702 source files or a reverse .h -> .c dependency for header files. */
3703 pst
->number_of_dependencies
= 0;
3705 = objfile
->partial_symtabs
->allocate_dependencies (fh
->crfd
- 1);
3706 for (s_idx
= 1; s_idx
< fh
->crfd
; s_idx
++)
3710 (*swap_rfd_in
) (cur_bfd
,
3711 ((char *) debug_info
->external_rfd
3712 + (fh
->rfdBase
+ s_idx
) * external_rfd_size
),
3714 if (rh
< 0 || rh
>= hdr
->ifdMax
)
3716 complaint (_("bad file number %ld"), rh
);
3720 /* Skip self dependencies of header files. */
3724 /* Do not add to dependency list if psymtab was empty. */
3725 if (fdr_to_pst
[rh
].pst
== NULL
)
3727 pst
->dependencies
[pst
->number_of_dependencies
++]
3728 = fdr_to_pst
[rh
].pst
;
3732 /* Remove the dummy psymtab created for -O3 images above, if it is
3733 still empty, to enable the detection of stripped executables. */
3734 partial_symtab
*pst_del
= objfile
->partial_symtabs
->psymtabs
;
3735 if (pst_del
->next
== NULL
3736 && pst_del
->number_of_dependencies
== 0
3737 && pst_del
->n_global_syms
== 0
3738 && pst_del
->n_static_syms
== 0)
3739 objfile
->partial_symtabs
->discard_psymtab (pst_del
);
3742 /* If the current psymbol has an enumerated type, we need to add
3743 all the enum constants to the partial symbol table. */
3746 handle_psymbol_enumerators (struct objfile
*objfile
, FDR
*fh
, int stype
,
3749 const bfd_size_type external_sym_size
= debug_swap
->external_sym_size
;
3750 void (*const swap_sym_in
) (bfd
*, void *, SYMR
*) = debug_swap
->swap_sym_in
;
3751 char *ext_sym
= ((char *) debug_info
->external_sym
3752 + ((fh
->isymBase
+ cur_sdx
+ 1) * external_sym_size
));
3762 /* It is an enumerated type if the next symbol entry is a stMember
3763 and its auxiliary index is indexNil or its auxiliary entry
3764 is a plain btNil or btVoid.
3765 Alpha cc -migrate enums are recognized by a zero index and
3766 a zero symbol value.
3767 DU 4.0 cc enums are recognized by a member type of btEnum without
3768 qualifiers and a zero symbol value. */
3769 (*swap_sym_in
) (cur_bfd
, ext_sym
, &sh
);
3770 if (sh
.st
!= stMember
)
3773 if (sh
.index
== indexNil
3774 || (sh
.index
== 0 && svalue
== 0))
3776 (*debug_swap
->swap_tir_in
) (fh
->fBigendian
,
3777 &(debug_info
->external_aux
3778 + fh
->iauxBase
+ sh
.index
)->a_ti
,
3780 if ((tir
.bt
!= btNil
3782 && (tir
.bt
!= btEnum
|| svalue
!= 0))
3783 || tir
.tq0
!= tqNil
)
3795 (*swap_sym_in
) (cur_bfd
, ext_sym
, &sh
);
3796 if (sh
.st
!= stMember
)
3798 name
= debug_info
->ss
+ cur_fdr
->issBase
+ sh
.iss
;
3800 /* Note that the value doesn't matter for enum constants
3801 in psymtabs, just in symtabs. */
3802 add_psymbol_to_list (name
, true,
3803 VAR_DOMAIN
, LOC_CONST
, -1,
3804 psymbol_placement::STATIC
, 0,
3805 psymtab_language
, objfile
);
3806 ext_sym
+= external_sym_size
;
3810 /* Get the next symbol. OBJFILE is unused. */
3813 mdebug_next_symbol_text (struct objfile
*objfile
)
3818 (*debug_swap
->swap_sym_in
) (cur_bfd
,
3819 ((char *) debug_info
->external_sym
3820 + ((cur_fdr
->isymBase
+ cur_sdx
)
3821 * debug_swap
->external_sym_size
)),
3823 return debug_info
->ss
+ cur_fdr
->issBase
+ sh
.iss
;
3826 /* Ancillary function to psymtab_to_symtab(). Does all the work
3827 for turning the partial symtab PST into a symtab, recurring
3828 first on all dependent psymtabs. The argument FILENAME is
3829 only passed so we can see in debug stack traces what file
3832 This function has a split personality, based on whether the
3833 symbol table contains ordinary ecoff symbols, or stabs-in-ecoff.
3834 The flow of control and even the memory allocation differs. FIXME. */
3837 psymtab_to_symtab_1 (struct objfile
*objfile
,
3838 legacy_psymtab
*pst
, const char *filename
)
3840 bfd_size_type external_sym_size
;
3841 bfd_size_type external_pdr_size
;
3842 void (*swap_sym_in
) (bfd
*, void *, SYMR
*);
3843 void (*swap_pdr_in
) (bfd
*, void *, PDR
*);
3845 struct compunit_symtab
*cust
= NULL
;
3847 struct linetable
*lines
;
3848 CORE_ADDR lowest_pdr_addr
= 0;
3849 int last_symtab_ended
= 0;
3850 const section_offsets
§ion_offsets
= objfile
->section_offsets
;
3856 /* Read in all partial symtabs on which this one is dependent.
3857 NOTE that we do have circular dependencies, sigh. We solved
3858 that by setting pst->readin before this point. */
3860 for (i
= 0; i
< pst
->number_of_dependencies
; i
++)
3861 if (!pst
->dependencies
[i
]->readin
)
3863 /* Inform about additional files to be read in. */
3866 fputs_filtered (" ", gdb_stdout
);
3868 fputs_filtered ("and ", gdb_stdout
);
3870 printf_filtered ("%s...",
3871 pst
->dependencies
[i
]->filename
);
3872 wrap_here (""); /* Flush output */
3873 gdb_flush (gdb_stdout
);
3875 /* We only pass the filename for debug purposes. */
3876 psymtab_to_symtab_1 (objfile
, (legacy_psymtab
*) pst
->dependencies
[i
],
3877 pst
->dependencies
[i
]->filename
);
3880 /* Do nothing if this is a dummy psymtab. */
3882 if (pst
->n_global_syms
== 0 && pst
->n_static_syms
== 0
3883 && !pst
->text_low_valid
&& !pst
->text_high_valid
)
3886 /* Now read the symbols for this symtab. */
3888 cur_bfd
= CUR_BFD (pst
);
3889 debug_swap
= DEBUG_SWAP (pst
);
3890 debug_info
= DEBUG_INFO (pst
);
3891 pending_list
= PENDING_LIST (pst
);
3892 external_sym_size
= debug_swap
->external_sym_size
;
3893 external_pdr_size
= debug_swap
->external_pdr_size
;
3894 swap_sym_in
= debug_swap
->swap_sym_in
;
3895 swap_pdr_in
= debug_swap
->swap_pdr_in
;
3896 mdebugread_objfile
= objfile
;
3897 cur_fd
= FDR_IDX (pst
);
3898 fh
= ((cur_fd
== -1)
3900 : debug_info
->fdr
+ cur_fd
);
3903 /* See comment in parse_partial_symbols about the @stabs sentinel. */
3904 processing_gcc_compilation
= 0;
3905 if (fh
!= NULL
&& fh
->csym
>= 2)
3909 (*swap_sym_in
) (cur_bfd
,
3910 ((char *) debug_info
->external_sym
3911 + (fh
->isymBase
+ 1) * external_sym_size
),
3913 if (strcmp (debug_info
->ss
+ fh
->issBase
+ sh
.iss
,
3916 /* We indicate that this is a GCC compilation so that certain
3917 features will be enabled in stabsread/dbxread. */
3918 processing_gcc_compilation
= 2;
3922 if (processing_gcc_compilation
!= 0)
3924 struct gdbarch
*gdbarch
= get_objfile_arch (objfile
);
3926 /* This symbol table contains stabs-in-ecoff entries. */
3928 /* Parse local symbols first. */
3930 if (fh
->csym
<= 2) /* FIXME, this blows psymtab->symtab ptr. */
3932 mdebugread_objfile
= NULL
;
3935 for (cur_sdx
= 2; cur_sdx
< fh
->csym
; cur_sdx
++)
3941 (*swap_sym_in
) (cur_bfd
,
3942 (((char *) debug_info
->external_sym
)
3943 + (fh
->isymBase
+ cur_sdx
) * external_sym_size
),
3945 name
= debug_info
->ss
+ fh
->issBase
+ sh
.iss
;
3947 /* XXX This is a hack. It will go away! */
3948 if (ECOFF_IS_STAB (&sh
) || (name
[0] == '#'))
3950 int type_code
= ECOFF_UNMARK_STAB (sh
.index
);
3951 enum language language
= PST_PRIVATE (pst
)->pst_language
;
3953 /* We should never get non N_STAB symbols here, but they
3954 should be harmless, so keep process_one_symbol from
3955 complaining about them. */
3956 if (type_code
& N_STAB
)
3958 /* If we found a trailing N_SO with no name, process
3959 it here instead of in process_one_symbol, so we
3960 can keep a handle to its symtab. The symtab
3961 would otherwise be ended twice, once in
3962 process_one_symbol, and once after this loop. */
3963 if (type_code
== N_SO
3964 && get_last_source_file ()
3965 && previous_stab_code
!= (unsigned char) N_SO
3968 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
3969 previous_stab_code
= N_SO
;
3970 cust
= end_symtab (valu
, SECT_OFF_TEXT (objfile
));
3972 last_symtab_ended
= 1;
3976 last_symtab_ended
= 0;
3977 process_one_symbol (type_code
, 0, valu
, name
,
3978 section_offsets
, objfile
, language
);
3981 /* Similarly a hack. */
3982 else if (name
[0] == '#')
3984 process_one_symbol (N_SLINE
, 0, valu
, name
,
3985 section_offsets
, objfile
, language
);
3987 if (type_code
== N_FUN
)
3989 /* Make up special symbol to contain
3990 procedure specific info. */
3991 mdebug_extra_func_info
*e
3992 = OBSTACK_ZALLOC (&mdebugread_objfile
->objfile_obstack
,
3993 mdebug_extra_func_info
);
3994 struct symbol
*s
= new_symbol (MDEBUG_EFI_SYMBOL_NAME
);
3996 SYMBOL_DOMAIN (s
) = LABEL_DOMAIN
;
3997 SYMBOL_ACLASS_INDEX (s
) = LOC_CONST
;
3998 SYMBOL_TYPE (s
) = objfile_type (objfile
)->builtin_void
;
3999 SYMBOL_VALUE_BYTES (s
) = (gdb_byte
*) e
;
4000 e
->pdr
.framereg
= -1;
4001 add_symbol_to_list (s
, get_local_symbols ());
4004 else if (sh
.st
== stLabel
)
4006 if (sh
.index
== indexNil
)
4008 /* This is what the gcc2_compiled and __gnu_compiled_*
4009 show up as. So don't complain. */
4014 /* Handle encoded stab line number. */
4015 valu
+= section_offsets
[SECT_OFF_TEXT (objfile
)];
4016 record_line (get_current_subfile (), sh
.index
,
4017 gdbarch_addr_bits_remove (gdbarch
, valu
));
4020 else if (sh
.st
== stProc
|| sh
.st
== stStaticProc
4021 || sh
.st
== stStatic
|| sh
.st
== stEnd
)
4022 /* These are generated by gcc-2.x, do not complain. */
4025 complaint (_("unknown stabs symbol %s"), name
);
4028 if (! last_symtab_ended
)
4030 cust
= end_symtab (pst
->raw_text_high (), SECT_OFF_TEXT (objfile
));
4034 /* There used to be a call to sort_blocks here, but this should not
4035 be necessary for stabs symtabs. And as sort_blocks modifies the
4036 start address of the GLOBAL_BLOCK to the FIRST_LOCAL_BLOCK,
4037 it did the wrong thing if the first procedure in a file was
4038 generated via asm statements. */
4040 /* Fill in procedure info next. */
4048 gdb::def_vector
<PDR
> pr_block (fh
->cpd
);
4050 pdr_ptr
= ((char *) debug_info
->external_pdr
4051 + fh
->ipdFirst
* external_pdr_size
);
4052 pdr_end
= pdr_ptr
+ fh
->cpd
* external_pdr_size
;
4053 pdr_in
= pr_block
.data ();
4056 pdr_ptr
+= external_pdr_size
, pdr_in
++)
4058 (*swap_pdr_in
) (cur_bfd
, pdr_ptr
, pdr_in
);
4060 /* Determine lowest PDR address, the PDRs are not always
4062 if (pdr_in
== pr_block
.data ())
4063 lowest_pdr_addr
= pdr_in
->adr
;
4064 else if (pdr_in
->adr
< lowest_pdr_addr
)
4065 lowest_pdr_addr
= pdr_in
->adr
;
4068 pdr_in
= pr_block
.data ();
4069 pdr_in_end
= pdr_in
+ fh
->cpd
;
4070 for (; pdr_in
< pdr_in_end
; pdr_in
++)
4071 parse_procedure (pdr_in
, cust
, pst
);
4076 /* This symbol table contains ordinary ecoff entries. */
4084 cust
= new_symtab ("unknown", 0, objfile
);
4088 maxlines
= 2 * fh
->cline
;
4089 cust
= new_symtab (pst
->filename
, maxlines
, objfile
);
4091 /* The proper language was already determined when building
4092 the psymtab, use it. */
4093 COMPUNIT_FILETABS (cust
)->language
= PST_PRIVATE (pst
)->pst_language
;
4096 psymtab_language
= COMPUNIT_FILETABS (cust
)->language
;
4098 lines
= SYMTAB_LINETABLE (COMPUNIT_FILETABS (cust
));
4100 /* Get a new lexical context. */
4102 push_parse_stack ();
4103 top_stack
->cur_st
= COMPUNIT_FILETABS (cust
);
4104 top_stack
->cur_block
4105 = BLOCKVECTOR_BLOCK (COMPUNIT_BLOCKVECTOR (cust
), STATIC_BLOCK
);
4106 BLOCK_START (top_stack
->cur_block
) = pst
->text_low (objfile
);
4107 BLOCK_END (top_stack
->cur_block
) = 0;
4108 top_stack
->blocktype
= stFile
;
4109 top_stack
->cur_type
= 0;
4110 top_stack
->procadr
= 0;
4111 top_stack
->numargs
= 0;
4112 found_ecoff_debugging_info
= 0;
4119 /* Parse local symbols first. */
4120 sym_ptr
= ((char *) debug_info
->external_sym
4121 + fh
->isymBase
* external_sym_size
);
4122 sym_end
= sym_ptr
+ fh
->csym
* external_sym_size
;
4123 while (sym_ptr
< sym_end
)
4128 (*swap_sym_in
) (cur_bfd
, sym_ptr
, &sh
);
4129 c
= parse_symbol (&sh
,
4130 debug_info
->external_aux
+ fh
->iauxBase
,
4131 sym_ptr
, fh
->fBigendian
,
4132 section_offsets
, objfile
);
4133 sym_ptr
+= c
* external_sym_size
;
4136 /* Linenumbers. At the end, check if we can save memory.
4137 parse_lines has to look ahead an arbitrary number of PDR
4138 structures, so we swap them all first. */
4146 gdb::def_vector
<PDR
> pr_block (fh
->cpd
);
4148 pdr_ptr
= ((char *) debug_info
->external_pdr
4149 + fh
->ipdFirst
* external_pdr_size
);
4150 pdr_end
= pdr_ptr
+ fh
->cpd
* external_pdr_size
;
4151 pdr_in
= pr_block
.data ();
4154 pdr_ptr
+= external_pdr_size
, pdr_in
++)
4156 (*swap_pdr_in
) (cur_bfd
, pdr_ptr
, pdr_in
);
4158 /* Determine lowest PDR address, the PDRs are not always
4160 if (pdr_in
== pr_block
.data ())
4161 lowest_pdr_addr
= pdr_in
->adr
;
4162 else if (pdr_in
->adr
< lowest_pdr_addr
)
4163 lowest_pdr_addr
= pdr_in
->adr
;
4166 parse_lines (fh
, pr_block
.data (), lines
, maxlines
,
4167 pst
->text_low (objfile
), lowest_pdr_addr
);
4168 if (lines
->nitems
< fh
->cline
)
4169 lines
= shrink_linetable (lines
);
4171 /* Fill in procedure info next. */
4172 pdr_in
= pr_block
.data ();
4173 pdr_in_end
= pdr_in
+ fh
->cpd
;
4174 for (; pdr_in
< pdr_in_end
; pdr_in
++)
4175 parse_procedure (pdr_in
, NULL
, pst
);
4179 size
= lines
->nitems
;
4182 SYMTAB_LINETABLE (COMPUNIT_FILETABS (cust
))
4183 = ((struct linetable
*)
4184 obstack_copy (&mdebugread_objfile
->objfile_obstack
,
4185 lines
, (sizeof (struct linetable
)
4186 + size
* sizeof (lines
->item
))));
4189 /* .. and our share of externals.
4190 XXX use the global list to speed up things here. How?
4191 FIXME, Maybe quit once we have found the right number of ext's? */
4192 top_stack
->cur_st
= COMPUNIT_FILETABS (cust
);
4193 top_stack
->cur_block
4194 = BLOCKVECTOR_BLOCK (SYMTAB_BLOCKVECTOR (top_stack
->cur_st
),
4196 top_stack
->blocktype
= stFile
;
4198 ext_ptr
= PST_PRIVATE (pst
)->extern_tab
;
4199 for (i
= PST_PRIVATE (pst
)->extern_count
; --i
>= 0; ext_ptr
++)
4200 parse_external (ext_ptr
, fh
->fBigendian
,
4201 section_offsets
, objfile
);
4203 /* If there are undefined symbols, tell the user.
4204 The alpha has an undefined symbol for every symbol that is
4205 from a shared library, so tell the user only if verbose is on. */
4206 if (info_verbose
&& n_undef_symbols
)
4208 printf_filtered (_("File %s contains %d unresolved references:"),
4209 symtab_to_filename_for_display
4210 (COMPUNIT_FILETABS (cust
)),
4212 printf_filtered ("\n\t%4d variables\n\t%4d "
4213 "procedures\n\t%4d labels\n",
4214 n_undef_vars
, n_undef_procs
, n_undef_labels
);
4215 n_undef_symbols
= n_undef_labels
= n_undef_vars
= n_undef_procs
= 0;
4220 sort_blocks (COMPUNIT_FILETABS (cust
));
4223 /* Now link the psymtab and the symtab. */
4224 pst
->compunit_symtab
= cust
;
4226 mdebugread_objfile
= NULL
;
4229 /* Ancillary parsing procedures. */
4231 /* Return 1 if the symbol pointed to by SH has a cross reference
4232 to an opaque aggregate type, else 0. */
4235 has_opaque_xref (FDR
*fh
, SYMR
*sh
)
4242 if (sh
->index
== indexNil
)
4245 ax
= debug_info
->external_aux
+ fh
->iauxBase
+ sh
->index
;
4246 (*debug_swap
->swap_tir_in
) (fh
->fBigendian
, &ax
->a_ti
, &tir
);
4247 if (tir
.bt
!= btStruct
&& tir
.bt
!= btUnion
&& tir
.bt
!= btEnum
)
4251 (*debug_swap
->swap_rndx_in
) (fh
->fBigendian
, &ax
->a_rndx
, rn
);
4252 if (rn
->rfd
== 0xfff)
4253 rf
= AUX_GET_ISYM (fh
->fBigendian
, ax
+ 1);
4261 /* Lookup the type at relative index RN. Return it in TPP
4262 if found and in any event come up with its name PNAME.
4263 BIGEND says whether aux symbols are big-endian or not (from fh->fBigendian).
4264 Return value says how many aux symbols we ate. */
4267 cross_ref (int fd
, union aux_ext
*ax
, struct type
**tpp
,
4268 enum type_code type_code
,
4269 /* Use to alloc new type if none is found. */
4270 const char **pname
, int bigend
, const char *sym_name
)
4279 struct mdebug_pending
*pend
;
4283 (*debug_swap
->swap_rndx_in
) (bigend
, &ax
->a_rndx
, rn
);
4285 /* Escape index means 'the next one'. */
4286 if (rn
->rfd
== 0xfff)
4289 rf
= AUX_GET_ISYM (bigend
, ax
+ 1);
4296 /* mips cc uses a rf of -1 for opaque struct definitions.
4297 Set TYPE_STUB for these types so that check_typedef will
4298 resolve them if the struct gets defined in another compilation unit. */
4301 *pname
= "<undefined>";
4302 *tpp
= init_type (mdebugread_objfile
, type_code
, 0, NULL
);
4303 TYPE_STUB (*tpp
) = 1;
4307 /* mips cc uses an escaped rn->index of 0 for struct return types
4308 of procedures that were compiled without -g. These will always remain
4310 if (rn
->rfd
== 0xfff && rn
->index
== 0)
4312 *pname
= "<undefined>";
4316 /* Find the relative file descriptor and the symbol in it. */
4317 fh
= get_rfd (fd
, rf
);
4318 xref_fd
= fh
- debug_info
->fdr
;
4320 if (rn
->index
>= fh
->csym
)
4322 /* File indirect entry is corrupt. */
4323 *pname
= "<illegal>";
4324 bad_rfd_entry_complaint (sym_name
, xref_fd
, rn
->index
);
4328 /* If we have processed this symbol then we left a forwarding
4329 pointer to the type in the pending list. If not, we`ll put
4330 it in a list of pending types, to be processed later when
4331 the file will be. In any event, we collect the name for the
4334 esh
= ((char *) debug_info
->external_sym
4335 + ((fh
->isymBase
+ rn
->index
)
4336 * debug_swap
->external_sym_size
));
4337 (*debug_swap
->swap_sym_in
) (cur_bfd
, esh
, &sh
);
4339 /* Make sure that this type of cross reference can be handled. */
4340 if ((sh
.sc
!= scInfo
4341 || (sh
.st
!= stBlock
&& sh
.st
!= stTypedef
&& sh
.st
!= stIndirect
4342 && sh
.st
!= stStruct
&& sh
.st
!= stUnion
4343 && sh
.st
!= stEnum
))
4344 && (sh
.st
!= stBlock
|| !SC_IS_COMMON (sh
.sc
)))
4346 /* File indirect entry is corrupt. */
4347 *pname
= "<illegal>";
4348 bad_rfd_entry_complaint (sym_name
, xref_fd
, rn
->index
);
4352 *pname
= debug_info
->ss
+ fh
->issBase
+ sh
.iss
;
4354 pend
= is_pending_symbol (fh
, esh
);
4359 /* We have not yet seen this type. */
4361 if ((sh
.iss
== 0 && sh
.st
== stTypedef
) || sh
.st
== stIndirect
)
4365 /* alpha cc puts out a stTypedef with a sh.iss of zero for
4367 a) forward declarations of structs/unions/enums which are not
4368 defined in this compilation unit.
4369 For these the type will be void. This is a bad design decision
4370 as cross referencing across compilation units is impossible
4371 due to the missing name.
4372 b) forward declarations of structs/unions/enums/typedefs which
4373 are defined later in this file or in another file in the same
4374 compilation unit. Irix5 cc uses a stIndirect symbol for this.
4375 Simply cross reference those again to get the true type.
4376 The forward references are not entered in the pending list and
4377 in the symbol table. */
4379 (*debug_swap
->swap_tir_in
) (bigend
,
4380 &(debug_info
->external_aux
4381 + fh
->iauxBase
+ sh
.index
)->a_ti
,
4383 if (tir
.tq0
!= tqNil
)
4384 complaint (_("illegal tq0 in forward typedef for %s"), sym_name
);
4388 *tpp
= init_type (mdebugread_objfile
, type_code
, 0, NULL
);
4389 *pname
= "<undefined>";
4396 (debug_info
->external_aux
4397 + fh
->iauxBase
+ sh
.index
+ 1),
4398 tpp
, type_code
, pname
,
4399 fh
->fBigendian
, sym_name
);
4403 /* Follow a forward typedef. This might recursively
4404 call cross_ref till we get a non typedef'ed type.
4405 FIXME: This is not correct behaviour, but gdb currently
4406 cannot handle typedefs without type copying. Type
4407 copying is impossible as we might have mutual forward
4408 references between two files and the copied type would not
4409 get filled in when we later parse its definition. */
4410 *tpp
= parse_type (xref_fd
,
4411 debug_info
->external_aux
+ fh
->iauxBase
,
4415 debug_info
->ss
+ fh
->issBase
+ sh
.iss
);
4416 add_pending (fh
, esh
, *tpp
);
4420 complaint (_("illegal bt %d in forward typedef for %s"), tir
.bt
,
4422 *tpp
= init_type (mdebugread_objfile
, type_code
, 0, NULL
);
4427 else if (sh
.st
== stTypedef
)
4429 /* Parse the type for a normal typedef. This might recursively call
4430 cross_ref till we get a non typedef'ed type.
4431 FIXME: This is not correct behaviour, but gdb currently
4432 cannot handle typedefs without type copying. But type copying is
4433 impossible as we might have mutual forward references between
4434 two files and the copied type would not get filled in when
4435 we later parse its definition. */
4436 *tpp
= parse_type (xref_fd
,
4437 debug_info
->external_aux
+ fh
->iauxBase
,
4441 debug_info
->ss
+ fh
->issBase
+ sh
.iss
);
4445 /* Cross reference to a struct/union/enum which is defined
4446 in another file in the same compilation unit but that file
4447 has not been parsed yet.
4448 Initialize the type only, it will be filled in when
4449 it's definition is parsed. */
4450 *tpp
= init_type (mdebugread_objfile
, type_code
, 0, NULL
);
4452 add_pending (fh
, esh
, *tpp
);
4455 /* We used one auxent normally, two if we got a "next one" rf. */
4460 /* Quick&dirty lookup procedure, to avoid the MI ones that require
4461 keeping the symtab sorted. */
4463 static struct symbol
*
4464 mylookup_symbol (const char *name
, const struct block
*block
,
4465 domain_enum domain
, enum address_class theclass
)
4467 struct block_iterator iter
;
4472 ALL_BLOCK_SYMBOLS (block
, iter
, sym
)
4474 if (sym
->linkage_name ()[0] == inc
4475 && SYMBOL_DOMAIN (sym
) == domain
4476 && SYMBOL_CLASS (sym
) == theclass
4477 && strcmp (sym
->linkage_name (), name
) == 0)
4481 block
= BLOCK_SUPERBLOCK (block
);
4483 return mylookup_symbol (name
, block
, domain
, theclass
);
4488 /* Add a new symbol S to a block B. */
4491 add_symbol (struct symbol
*s
, struct symtab
*symtab
, struct block
*b
)
4493 symbol_set_symtab (s
, symtab
);
4494 mdict_add_symbol (BLOCK_MULTIDICT (b
), s
);
4497 /* Add a new block B to a symtab S. */
4500 add_block (struct block
*b
, struct symtab
*s
)
4502 /* Cast away "const", but that's ok because we're building the
4503 symtab and blockvector here. */
4504 struct blockvector
*bv
= (struct blockvector
*) SYMTAB_BLOCKVECTOR (s
);
4506 bv
= (struct blockvector
*) xrealloc ((void *) bv
,
4507 (sizeof (struct blockvector
)
4508 + BLOCKVECTOR_NBLOCKS (bv
)
4509 * sizeof (bv
->block
)));
4510 if (bv
!= SYMTAB_BLOCKVECTOR (s
))
4511 SYMTAB_BLOCKVECTOR (s
) = bv
;
4513 BLOCKVECTOR_BLOCK (bv
, BLOCKVECTOR_NBLOCKS (bv
)++) = b
;
4516 /* Add a new linenumber entry (LINENO,ADR) to a linevector LT.
4517 MIPS' linenumber encoding might need more than one byte
4518 to describe it, LAST is used to detect these continuation lines.
4520 Combining lines with the same line number seems like a bad idea.
4521 E.g: There could be a line number entry with the same line number after the
4522 prologue and GDB should not ignore it (this is a better way to find
4523 a prologue than mips_skip_prologue).
4524 But due to the compressed line table format there are line number entries
4525 for the same line which are needed to bridge the gap to the next
4526 line number entry. These entries have a bogus address info with them
4527 and we are unable to tell them from intended duplicate line number
4529 This is another reason why -ggdb debugging format is preferable. */
4532 add_line (struct linetable
*lt
, int lineno
, CORE_ADDR adr
, int last
)
4534 /* DEC c89 sometimes produces zero linenos which confuse gdb.
4535 Change them to something sensible. */
4539 last
= -2; /* Make sure we record first line. */
4541 if (last
== lineno
) /* Skip continuation lines. */
4544 lt
->item
[lt
->nitems
].line
= lineno
;
4545 lt
->item
[lt
->nitems
++].pc
= adr
<< 2;
4549 /* Sorting and reordering procedures. */
4551 /* Blocks with a smaller low bound should come first. */
4554 block_is_less_than (const struct block
*b1
, const struct block
*b2
)
4556 CORE_ADDR start1
= BLOCK_START (b1
);
4557 CORE_ADDR start2
= BLOCK_START (b2
);
4559 if (start1
!= start2
)
4560 return start1
< start2
;
4562 return (BLOCK_END (b2
)) < (BLOCK_END (b1
));
4565 /* Sort the blocks of a symtab S.
4566 Reorder the blocks in the blockvector by code-address,
4567 as required by some MI search routines. */
4570 sort_blocks (struct symtab
*s
)
4572 /* We have to cast away const here, but this is ok because we're
4573 constructing the blockvector in this code. */
4574 struct blockvector
*bv
= (struct blockvector
*) SYMTAB_BLOCKVECTOR (s
);
4576 if (BLOCKVECTOR_NBLOCKS (bv
) <= FIRST_LOCAL_BLOCK
)
4579 if (BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
)) == 0)
4580 BLOCK_START (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
)) = 0;
4581 if (BLOCK_END (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)) == 0)
4582 BLOCK_START (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)) = 0;
4586 * This is very unfortunate: normally all functions are compiled in
4587 * the order they are found, but if the file is compiled -O3 things
4588 * are very different. It would be nice to find a reliable test
4589 * to detect -O3 images in advance.
4591 if (BLOCKVECTOR_NBLOCKS (bv
) > FIRST_LOCAL_BLOCK
+ 1)
4592 std::sort (&BLOCKVECTOR_BLOCK (bv
, FIRST_LOCAL_BLOCK
),
4593 &BLOCKVECTOR_BLOCK (bv
, BLOCKVECTOR_NBLOCKS (bv
)),
4594 block_is_less_than
);
4598 int i
, j
= BLOCKVECTOR_NBLOCKS (bv
);
4600 for (i
= FIRST_LOCAL_BLOCK
; i
< j
; i
++)
4601 if (high
< BLOCK_END (BLOCKVECTOR_BLOCK (bv
, i
)))
4602 high
= BLOCK_END (BLOCKVECTOR_BLOCK (bv
, i
));
4603 BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
)) = high
;
4606 BLOCK_START (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
)) =
4607 BLOCK_START (BLOCKVECTOR_BLOCK (bv
, FIRST_LOCAL_BLOCK
));
4609 BLOCK_START (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)) =
4610 BLOCK_START (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
4611 BLOCK_END (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)) =
4612 BLOCK_END (BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
));
4616 /* Constructor/restructor/destructor procedures. */
4618 /* Allocate a new symtab for NAME. Needs an estimate of how many
4619 linenumbers MAXLINES we'll put in it. */
4621 static struct compunit_symtab
*
4622 new_symtab (const char *name
, int maxlines
, struct objfile
*objfile
)
4624 struct compunit_symtab
*cust
= allocate_compunit_symtab (objfile
, name
);
4625 struct symtab
*symtab
;
4626 struct blockvector
*bv
;
4629 add_compunit_symtab_to_objfile (cust
);
4630 symtab
= allocate_symtab (cust
, name
);
4632 SYMTAB_LINETABLE (symtab
) = new_linetable (maxlines
);
4633 lang
= compunit_language (cust
);
4635 /* All symtabs must have at least two blocks. */
4637 BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
) = new_block (NON_FUNCTION_BLOCK
, lang
);
4638 BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
) = new_block (NON_FUNCTION_BLOCK
, lang
);
4639 BLOCK_SUPERBLOCK (BLOCKVECTOR_BLOCK (bv
, STATIC_BLOCK
)) =
4640 BLOCKVECTOR_BLOCK (bv
, GLOBAL_BLOCK
);
4641 COMPUNIT_BLOCKVECTOR (cust
) = bv
;
4643 COMPUNIT_DEBUGFORMAT (cust
) = "ECOFF";
4647 /* Allocate a new partial_symtab NAME. */
4649 static legacy_psymtab
*
4650 new_psymtab (const char *name
, struct objfile
*objfile
)
4652 legacy_psymtab
*psymtab
;
4654 psymtab
= new legacy_psymtab (name
, objfile
);
4656 /* Keep a backpointer to the file's symbols. */
4658 psymtab
->read_symtab_private
4659 = OBSTACK_ZALLOC (&objfile
->objfile_obstack
, symloc
);
4660 CUR_BFD (psymtab
) = cur_bfd
;
4661 DEBUG_SWAP (psymtab
) = debug_swap
;
4662 DEBUG_INFO (psymtab
) = debug_info
;
4663 PENDING_LIST (psymtab
) = pending_list
;
4665 /* The way to turn this into a symtab is to call... */
4666 psymtab
->legacy_read_symtab
= mdebug_read_symtab
;
4671 /* Allocate a linetable array of the given SIZE. Since the struct
4672 already includes one item, we subtract one when calculating the
4673 proper size to allocate. */
4675 static struct linetable
*
4676 new_linetable (int size
)
4678 struct linetable
*l
;
4682 size
= size
* sizeof (l
->item
) + sizeof (struct linetable
);
4683 l
= (struct linetable
*) xmalloc (size
);
4688 /* Oops, too big. Shrink it. This was important with the 2.4 linetables,
4689 I am not so sure about the 3.4 ones.
4691 Since the struct linetable already includes one item, we subtract one when
4692 calculating the proper size to allocate. */
4694 static struct linetable
*
4695 shrink_linetable (struct linetable
*lt
)
4697 return (struct linetable
*) xrealloc ((void *) lt
,
4698 (sizeof (struct linetable
)
4700 * sizeof (lt
->item
))));
4703 /* Allocate and zero a new blockvector of NBLOCKS blocks. */
4705 static struct blockvector
*
4706 new_bvect (int nblocks
)
4708 struct blockvector
*bv
;
4711 size
= sizeof (struct blockvector
) + nblocks
* sizeof (struct block
*);
4712 bv
= (struct blockvector
*) xzalloc (size
);
4714 BLOCKVECTOR_NBLOCKS (bv
) = nblocks
;
4719 /* Allocate and zero a new block of language LANGUAGE, and set its
4720 BLOCK_MULTIDICT. If function is non-zero, assume the block is
4721 associated to a function, and make sure that the symbols are stored
4722 linearly; otherwise, store them hashed. */
4724 static struct block
*
4725 new_block (enum block_type type
, enum language language
)
4727 /* FIXME: carlton/2003-09-11: This should use allocate_block to
4728 allocate the block. Which, in turn, suggests that the block
4729 should be allocated on an obstack. */
4730 struct block
*retval
= XCNEW (struct block
);
4732 if (type
== FUNCTION_BLOCK
)
4733 BLOCK_MULTIDICT (retval
) = mdict_create_linear_expandable (language
);
4735 BLOCK_MULTIDICT (retval
) = mdict_create_hashed_expandable (language
);
4740 /* Create a new symbol with printname NAME. */
4742 static struct symbol
*
4743 new_symbol (const char *name
)
4745 struct symbol
*s
= allocate_symbol (mdebugread_objfile
);
4747 s
->set_language (psymtab_language
, &mdebugread_objfile
->objfile_obstack
);
4748 s
->compute_and_set_names (name
, true, mdebugread_objfile
->per_bfd
);
4752 /* Create a new type with printname NAME. */
4754 static struct type
*
4755 new_type (char *name
)
4759 t
= alloc_type (mdebugread_objfile
);
4760 TYPE_NAME (t
) = name
;
4761 INIT_CPLUS_SPECIFIC (t
);
4765 /* Read ECOFF debugging information from a BFD section. This is
4766 called from elfread.c. It parses the section into a
4767 ecoff_debug_info struct, and then lets the rest of the file handle
4771 elfmdebug_build_psymtabs (struct objfile
*objfile
,
4772 const struct ecoff_debug_swap
*swap
, asection
*sec
)
4774 bfd
*abfd
= objfile
->obfd
;
4775 struct ecoff_debug_info
*info
;
4777 /* FIXME: It's not clear whether we should be getting minimal symbol
4778 information from .mdebug in an ELF file, or whether we will.
4779 Re-initialize the minimal symbol reader in case we do. */
4781 minimal_symbol_reader
reader (objfile
);
4783 info
= XOBNEW (&objfile
->objfile_obstack
, ecoff_debug_info
);
4785 if (!(*swap
->read_debug_info
) (abfd
, sec
, info
))
4786 error (_("Error reading ECOFF debugging information: %s"),
4787 bfd_errmsg (bfd_get_error ()));
4789 mdebug_build_psymtabs (reader
, objfile
, swap
, info
);
4794 void _initialize_mdebugread ();
4796 _initialize_mdebugread ()
4798 mdebug_register_index
4799 = register_symbol_register_impl (LOC_REGISTER
, &mdebug_register_funcs
);
4800 mdebug_regparm_index
4801 = register_symbol_register_impl (LOC_REGPARM_ADDR
, &mdebug_register_funcs
);