1 /* Output dbx-format symbol table information from GNU compiler.
2 Copyright (C) 1987, 88, 92, 93, 94, 95, 1996 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
22 /* Output dbx-format symbol table data.
23 This consists of many symbol table entries, each of them
24 a .stabs assembler pseudo-op with four operands:
25 a "name" which is really a description of one symbol and its type,
26 a "code", which is a symbol defined in stab.h whose name starts with N_,
27 an unused operand always 0,
28 and a "value" which is an address or an offset.
29 The name is enclosed in doublequote characters.
31 Each function, variable, typedef, and structure tag
32 has a symbol table entry to define it.
33 The beginning and end of each level of name scoping within
34 a function are also marked by special symbol table entries.
36 The "name" consists of the symbol name, a colon, a kind-of-symbol letter,
37 and a data type number. The data type number may be followed by
38 "=" and a type definition; normally this will happen the first time
39 the type number is mentioned. The type definition may refer to
40 other types by number, and those type numbers may be followed
41 by "=" and nested definitions.
43 This can make the "name" quite long.
44 When a name is more than 80 characters, we split the .stabs pseudo-op
45 into two .stabs pseudo-ops, both sharing the same "code" and "value".
46 The first one is marked as continued with a double-backslash at the
49 The kind-of-symbol letter distinguished function names from global
50 variables from file-scope variables from parameters from auto
51 variables in memory from typedef names from register variables.
54 The "code" is mostly redundant with the kind-of-symbol letter
55 that goes in the "name", but not entirely: for symbols located
56 in static storage, the "code" says which segment the address is in,
57 which controls how it is relocated.
59 The "value" for a symbol in static storage
60 is the core address of the symbol (actually, the assembler
61 label for the symbol). For a symbol located in a stack slot
62 it is the stack offset; for one in a register, the register number.
63 For a typedef symbol, it is zero.
65 If DEBUG_SYMS_TEXT is defined, all debugging symbols must be
66 output while in the text section.
68 For more on data type definitions, see `dbxout_type'. */
70 /* Include these first, because they may define MIN and MAX. */
79 #include "insn-config.h"
82 #include "output.h" /* ASM_OUTPUT_SOURCE_LINE may refer to sdb functions. */
88 #ifdef XCOFF_DEBUGGING_INFO
93 #define ASM_STABS_OP ".stabs"
97 #define ASM_STABN_OP ".stabn"
100 #ifndef DBX_TYPE_DECL_STABS_CODE
101 #define DBX_TYPE_DECL_STABS_CODE N_LSYM
104 #ifndef DBX_STATIC_CONST_VAR_CODE
105 #define DBX_STATIC_CONST_VAR_CODE N_FUN
108 #ifndef DBX_REGPARM_STABS_CODE
109 #define DBX_REGPARM_STABS_CODE N_RSYM
112 #ifndef DBX_REGPARM_STABS_LETTER
113 #define DBX_REGPARM_STABS_LETTER 'P'
116 /* This is used for parameters passed by invisible reference in a register. */
117 #ifndef GDB_INV_REF_REGPARM_STABS_LETTER
118 #define GDB_INV_REF_REGPARM_STABS_LETTER 'a'
121 #ifndef DBX_MEMPARM_STABS_LETTER
122 #define DBX_MEMPARM_STABS_LETTER 'p'
125 #ifndef FILE_NAME_JOINER
126 #define FILE_NAME_JOINER "/"
129 /* Nonzero means if the type has methods, only output debugging
130 information if methods are actually written to the asm file. This
131 optimization only works if the debugger can detect the special C++
134 #define MINIMAL_DEBUG 1
136 #ifdef NO_DOLLAR_IN_LABEL
137 #ifdef NO_DOT_IN_LABEL
139 #define MINIMAL_DEBUG 0
143 static int flag_minimal_debug = MINIMAL_DEBUG;
145 /* Nonzero if we have actually used any of the GDB extensions
146 to the debugging format. The idea is that we use them for the
147 first time only if there's a strong reason, but once we have done that,
148 we use them whenever convenient. */
150 static int have_used_extensions = 0;
152 /* Number for the next N_SOL filename stabs label. The number 0 is reserved
153 for the N_SO filename stabs label. */
155 static int source_label_number = 1;
159 /* Typical USG systems don't have stab.h, and they also have
160 no use for DBX-format debugging info. */
162 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
164 #ifdef DEBUG_SYMS_TEXT
165 #define FORCE_TEXT text_section ();
170 #if defined (USG) || defined (NO_STAB_H) || defined (CROSS_COMPILE)
171 #include "gstab.h" /* If doing DBX on sysV, use our own stab.h. */
173 #include <stab.h> /* On BSD, use the system's stab.h. */
175 /* This is a GNU extension we need to reference in this file. */
182 #define STAB_CODE_TYPE enum __stab_debug_code
184 #define STAB_CODE_TYPE int
187 /* 1 if PARM is passed to this function in memory. */
189 #define PARM_PASSED_IN_MEMORY(PARM) \
190 (GET_CODE (DECL_INCOMING_RTL (PARM)) == MEM)
192 /* A C expression for the integer offset value of an automatic variable
193 (N_LSYM) having address X (an RTX). */
194 #ifndef DEBUGGER_AUTO_OFFSET
195 #define DEBUGGER_AUTO_OFFSET(X) \
196 (GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0)
199 /* A C expression for the integer offset value of an argument (N_PSYM)
200 having address X (an RTX). The nominal offset is OFFSET. */
201 #ifndef DEBUGGER_ARG_OFFSET
202 #define DEBUGGER_ARG_OFFSET(OFFSET, X) (OFFSET)
205 /* Stream for writing to assembler file. */
207 static FILE *asmfile;
209 /* Last source file name mentioned in a NOTE insn. */
211 static char *lastfile;
213 /* Current working directory. */
217 enum typestatus {TYPE_UNSEEN, TYPE_XREF, TYPE_DEFINED};
219 /* Structure recording information about a C data type.
220 The status element says whether we have yet output
221 the definition of the type. TYPE_XREF says we have
222 output it as a cross-reference only.
223 The file_number and type_number elements are used if DBX_USE_BINCL
228 enum typestatus status;
235 /* Vector recording information about C data types.
236 When we first notice a data type (a tree node),
237 we assign it a number using next_type_number.
238 That is its index in this vector. */
240 struct typeinfo *typevec;
242 /* Number of elements of space allocated in `typevec'. */
244 static int typevec_len;
246 /* In dbx output, each type gets a unique number.
247 This is the number for the next type output.
248 The number, once assigned, is in the TYPE_SYMTAB_ADDRESS field. */
250 static int next_type_number;
254 /* When using N_BINCL in dbx output, each type number is actually a
255 pair of the file number and the type number within the file.
256 This is a stack of input files. */
260 struct dbx_file *next;
262 int next_type_number;
265 /* This is the top of the stack. */
267 static struct dbx_file *current_file;
269 /* This is the next file number to use. */
271 static int next_file_number;
273 #endif /* DBX_USE_BINCL */
275 /* In dbx output, we must assign symbol-blocks id numbers
276 in the order in which their beginnings are encountered.
277 We output debugging info that refers to the beginning and
278 end of the ranges of code in each block
279 with assembler labels LBBn and LBEn, where n is the block number.
280 The labels are generated in final, which assigns numbers to the
281 blocks in the same way. */
283 static int next_block_number;
285 /* These variables are for dbxout_symbol to communicate to
286 dbxout_finish_symbol.
287 current_sym_code is the symbol-type-code, a symbol N_... define in stab.h.
288 current_sym_value and current_sym_addr are two ways to address the
289 value to store in the symtab entry.
290 current_sym_addr if nonzero represents the value as an rtx.
291 If that is zero, current_sym_value is used. This is used
292 when the value is an offset (such as for auto variables,
293 register variables and parms). */
295 static STAB_CODE_TYPE current_sym_code;
296 static int current_sym_value;
297 static rtx current_sym_addr;
299 /* Number of chars of symbol-description generated so far for the
300 current symbol. Used by CHARS and CONTIN. */
302 static int current_sym_nchars;
304 /* Report having output N chars of the current symbol-description. */
306 #define CHARS(N) (current_sym_nchars += (N))
308 /* Break the current symbol-description, generating a continuation,
309 if it has become long. */
311 #ifndef DBX_CONTIN_LENGTH
312 #define DBX_CONTIN_LENGTH 80
315 #if DBX_CONTIN_LENGTH > 0
317 do {if (current_sym_nchars > DBX_CONTIN_LENGTH) dbxout_continue ();} while (0)
322 void dbxout_types ();
324 void dbxout_symbol ();
325 static void dbxout_type_name ();
326 static void dbxout_type ();
327 static void dbxout_typedefs ();
328 static void dbxout_symbol_name ();
329 static void dbxout_symbol_location ();
330 static void dbxout_prepare_symbol ();
331 static void dbxout_finish_symbol ();
332 static void dbxout_type_index ();
333 static void dbxout_continue ();
334 static void print_int_cst_octal ();
335 static void print_octal ();
337 #if 0 /* Not clear we will actually need this. */
339 /* Return the absolutized filename for the given relative
340 filename. Note that if that filename is already absolute, it may
341 still be returned in a modified form because this routine also
342 eliminates redundant slashes and single dots and eliminates double
343 dots to get a shortest possible filename from the given input
344 filename. The absolutization of relative filenames is made by
345 assuming that the given filename is to be taken as relative to
346 the first argument (cwd) or to the current directory if cwd is
350 abspath (rel_filename)
353 /* Setup the current working directory as needed. */
355 = (char *) alloca (strlen (cwd) + strlen (rel_filename) + 1);
356 char *endp = abs_buffer;
360 /* Copy the filename (possibly preceded by the current working
361 directory name) into the absolutization buffer. */
366 if (rel_filename[0] != '/')
369 while (*endp++ = *src_p++)
371 *(endp-1) = '/'; /* overwrite null */
373 src_p = rel_filename;
374 while (*endp++ = *src_p++)
379 /* Now make a copy of abs_buffer into abs_buffer, shortening the
380 filename (by taking out slashes and dots) as we go. */
382 outp = inp = abs_buffer;
383 *outp++ = *inp++; /* copy first slash */
388 else if (inp[0] == '/' && outp[-1] == '/')
393 else if (inp[0] == '.' && outp[-1] == '/')
397 else if (inp[1] == '/')
402 else if ((inp[1] == '.') && (inp[2] == 0 || inp[2] == '/'))
404 inp += (inp[2] == '/') ? 3 : 2;
406 while (outp >= abs_buffer && *outp != '/')
408 if (outp < abs_buffer)
410 /* Catch cases like /.. where we try to backup to a
411 point above the absolute root of the logical file
414 fprintf (stderr, "%s: invalid file name: %s\n",
415 pname, rel_filename);
425 /* On exit, make sure that there is a trailing null, and make sure that
426 the last character of the returned string is *not* a slash. */
432 /* Make a copy (in the heap) of the stuff left in the absolutization
433 buffer and return a pointer to the copy. */
435 value = (char *) oballoc (strlen (abs_buffer) + 1);
436 strcpy (value, abs_buffer);
441 /* At the beginning of compilation, start writing the symbol table.
442 Initialize `typevec' and output the standard data types of C. */
445 dbxout_init (asm_file, input_file_name, syms)
447 char *input_file_name;
450 char ltext_label_name[100];
455 typevec = (struct typeinfo *) xmalloc (typevec_len * sizeof typevec[0]);
456 bzero ((char *) typevec, typevec_len * sizeof typevec[0]);
458 /* Convert Ltext into the appropriate format for local labels in case
459 the system doesn't insert underscores in front of user generated
461 ASM_GENERATE_INTERNAL_LABEL (ltext_label_name, "Ltext", 0);
463 /* Put the current working directory in an N_SO symbol. */
464 #ifndef DBX_WORKING_DIRECTORY /* Only some versions of DBX want this,
465 but GDB always does. */
466 if (use_gnu_debug_info_extensions)
469 if (!cwd && (cwd = getpwd ()) && (!*cwd || cwd[strlen (cwd) - 1] != '/'))
471 char *wdslash = xmalloc (strlen (cwd) + sizeof (FILE_NAME_JOINER));
472 sprintf (wdslash, "%s%s", cwd, FILE_NAME_JOINER);
477 #ifdef DBX_OUTPUT_MAIN_SOURCE_DIRECTORY
478 DBX_OUTPUT_MAIN_SOURCE_DIRECTORY (asmfile, cwd);
479 #else /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */
480 fprintf (asmfile, "%s ", ASM_STABS_OP);
481 output_quoted_string (asmfile, cwd);
482 fprintf (asmfile, ",%d,0,0,%s\n", N_SO, <ext_label_name[1]);
483 #endif /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */
487 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILENAME
488 /* This should NOT be DBX_OUTPUT_SOURCE_FILENAME. That
489 would give us an N_SOL, and we want an N_SO. */
490 DBX_OUTPUT_MAIN_SOURCE_FILENAME (asmfile, input_file_name);
491 #else /* no DBX_OUTPUT_MAIN_SOURCE_FILENAME */
492 /* We include outputting `Ltext:' here,
493 because that gives you a way to override it. */
494 /* Used to put `Ltext:' before the reference, but that loses on sun 4. */
495 fprintf (asmfile, "%s ", ASM_STABS_OP);
496 output_quoted_string (asmfile, input_file_name);
497 fprintf (asmfile, ",%d,0,0,%s\n",
498 N_SO, <ext_label_name[1]);
500 ASM_OUTPUT_INTERNAL_LABEL (asmfile, "Ltext", 0);
501 #endif /* no DBX_OUTPUT_MAIN_SOURCE_FILENAME */
503 /* Possibly output something to inform GDB that this compilation was by
504 GCC. It's easier for GDB to parse it when after the N_SO's. This
505 is used in Solaris 2. */
506 #ifdef ASM_IDENTIFY_GCC_AFTER_SOURCE
507 ASM_IDENTIFY_GCC_AFTER_SOURCE (asmfile);
510 lastfile = input_file_name;
512 next_type_number = 1;
513 next_block_number = 2;
516 current_file = (struct dbx_file *) xmalloc (sizeof *current_file);
517 current_file->next = NULL;
518 current_file->file_number = 0;
519 current_file->next_type_number = 1;
520 next_file_number = 1;
523 /* Make sure that types `int' and `char' have numbers 1 and 2.
524 Definitions of other integer types will refer to those numbers.
525 (Actually it should no longer matter what their numbers are.
526 Also, if any types with tags have been defined, dbxout_symbol
527 will output them first, so the numbers won't be 1 and 2. That
528 happens in C++. So it's a good thing it should no longer matter). */
530 #ifdef DBX_OUTPUT_STANDARD_TYPES
531 DBX_OUTPUT_STANDARD_TYPES (syms);
533 dbxout_symbol (TYPE_NAME (integer_type_node), 0);
534 dbxout_symbol (TYPE_NAME (char_type_node), 0);
537 /* Get all permanent types that have typedef names,
538 and output them all, except for those already output. */
540 dbxout_typedefs (syms);
543 /* Output any typedef names for types described by TYPE_DECLs in SYMS,
544 in the reverse order from that which is found in SYMS. */
547 dbxout_typedefs (syms)
552 dbxout_typedefs (TREE_CHAIN (syms));
553 if (TREE_CODE (syms) == TYPE_DECL)
555 tree type = TREE_TYPE (syms);
557 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
558 && ! TREE_ASM_WRITTEN (TYPE_NAME (type)))
559 dbxout_symbol (TYPE_NAME (type), 0);
564 /* Change to reading from a new source file. Generate a N_BINCL stab. */
567 dbxout_start_new_source_file (filename)
571 struct dbx_file *n = (struct dbx_file *) xmalloc (sizeof *n);
573 n->next = current_file;
574 n->file_number = next_file_number++;
575 n->next_type_number = 1;
577 fprintf (asmfile, "%s \"%s\",%d,0,0,0\n", ASM_STABS_OP, filename, N_BINCL);
581 /* Revert to reading a previous source file. Generate a N_EINCL stab. */
584 dbxout_resume_previous_source_file ()
587 struct dbx_file *next;
589 fprintf (asmfile, "%s %d,0,0,0\n", ASM_STABN_OP, N_EINCL);
590 next = current_file->next;
596 /* Output debugging info to FILE to switch to sourcefile FILENAME. */
599 dbxout_source_file (file, filename)
603 char ltext_label_name[100];
605 if (filename && (lastfile == 0 || strcmp (filename, lastfile)))
607 #ifdef DBX_OUTPUT_SOURCE_FILENAME
608 DBX_OUTPUT_SOURCE_FILENAME (file, filename);
610 ASM_GENERATE_INTERNAL_LABEL (ltext_label_name, "Ltext",
611 source_label_number);
612 fprintf (file, "%s ", ASM_STABS_OP);
613 output_quoted_string (file, filename);
614 fprintf (file, ",%d,0,0,%s\n", N_SOL, <ext_label_name[1]);
615 if (current_function_decl != NULL_TREE
616 && DECL_SECTION_NAME (current_function_decl) != NULL_TREE)
617 ; /* Don't change section amid function. */
620 ASM_OUTPUT_INTERNAL_LABEL (file, "Ltext", source_label_number);
621 source_label_number++;
627 /* Output a line number symbol entry into output stream FILE,
628 for source file FILENAME and line number LINENO. */
631 dbxout_source_line (file, filename, lineno)
636 dbxout_source_file (file, filename);
638 #ifdef ASM_OUTPUT_SOURCE_LINE
639 ASM_OUTPUT_SOURCE_LINE (file, lineno);
641 fprintf (file, "\t%s %d,0,%d\n", ASM_STABD_OP, N_SLINE, lineno);
645 /* At the end of compilation, finish writing the symbol table.
646 Unless you define DBX_OUTPUT_MAIN_SOURCE_FILE_END, the default is
650 dbxout_finish (file, filename)
654 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILE_END
655 DBX_OUTPUT_MAIN_SOURCE_FILE_END (file, filename);
656 #endif /* DBX_OUTPUT_MAIN_SOURCE_FILE_END */
659 /* Output the index of a type. */
662 dbxout_type_index (type)
665 #ifndef DBX_USE_BINCL
666 fprintf (asmfile, "%d", TYPE_SYMTAB_ADDRESS (type));
669 struct typeinfo *t = &typevec[TYPE_SYMTAB_ADDRESS (type)];
670 fprintf (asmfile, "(%d,%d)", t->file_number, t->type_number);
675 /* Continue a symbol-description that gets too big.
676 End one symbol table entry with a double-backslash
677 and start a new one, eventually producing something like
678 .stabs "start......\\",code,0,value
679 .stabs "...rest",code,0,value */
684 #ifdef DBX_CONTIN_CHAR
685 fprintf (asmfile, "%c", DBX_CONTIN_CHAR);
687 fprintf (asmfile, "\\\\");
689 dbxout_finish_symbol (NULL_TREE);
690 fprintf (asmfile, "%s \"", ASM_STABS_OP);
691 current_sym_nchars = 0;
694 /* Subroutine of `dbxout_type'. Output the type fields of TYPE.
695 This must be a separate function because anonymous unions require
699 dbxout_type_fields (type)
703 /* Output the name, type, position (in bits), size (in bits) of each
705 for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem))
707 /* Omit here local type decls until we know how to support them. */
708 if (TREE_CODE (tem) == TYPE_DECL)
710 /* Omit fields whose position or size are variable. */
711 else if (TREE_CODE (tem) == FIELD_DECL
712 && (TREE_CODE (DECL_FIELD_BITPOS (tem)) != INTEGER_CST
713 || TREE_CODE (DECL_SIZE (tem)) != INTEGER_CST))
715 /* Omit here the nameless fields that are used to skip bits. */
716 else if (TREE_CODE (tem) != CONST_DECL)
718 /* Continue the line if necessary,
719 but not before the first field. */
720 if (tem != TYPE_FIELDS (type))
723 if (use_gnu_debug_info_extensions
724 && flag_minimal_debug
725 && TREE_CODE (tem) == FIELD_DECL
726 && DECL_VIRTUAL_P (tem)
727 && DECL_ASSEMBLER_NAME (tem))
729 have_used_extensions = 1;
730 CHARS (3 + IDENTIFIER_LENGTH (DECL_ASSEMBLER_NAME (tem)));
731 fputs (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (tem)), asmfile);
732 dbxout_type (DECL_FCONTEXT (tem), 0, 0);
733 fprintf (asmfile, ":");
734 dbxout_type (TREE_TYPE (tem), 0, 0);
735 fprintf (asmfile, ",%d;",
736 TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem)));
742 fprintf (asmfile, "%s:", IDENTIFIER_POINTER (DECL_NAME (tem)));
743 CHARS (2 + IDENTIFIER_LENGTH (DECL_NAME (tem)));
747 fprintf (asmfile, ":");
751 if (use_gnu_debug_info_extensions
752 && (TREE_PRIVATE (tem) || TREE_PROTECTED (tem)
753 || TREE_CODE (tem) != FIELD_DECL))
755 have_used_extensions = 1;
757 putc ((TREE_PRIVATE (tem) ? '0'
758 : TREE_PROTECTED (tem) ? '1' : '2'),
763 dbxout_type ((TREE_CODE (tem) == FIELD_DECL
764 && DECL_BIT_FIELD_TYPE (tem))
765 ? DECL_BIT_FIELD_TYPE (tem)
766 : TREE_TYPE (tem), 0, 0);
768 if (TREE_CODE (tem) == VAR_DECL)
770 if (TREE_STATIC (tem) && use_gnu_debug_info_extensions)
772 char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (tem));
773 have_used_extensions = 1;
774 fprintf (asmfile, ":%s;", name);
775 CHARS (strlen (name));
779 /* If TEM is non-static, GDB won't understand it. */
780 fprintf (asmfile, ",0,0;");
783 else if (TREE_CODE (DECL_FIELD_BITPOS (tem)) == INTEGER_CST)
785 fprintf (asmfile, ",%d,%d;",
786 TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem)),
787 TREE_INT_CST_LOW (DECL_SIZE (tem)));
794 /* Subroutine of `dbxout_type_methods'. Output debug info about the
795 method described DECL. DEBUG_NAME is an encoding of the method's
796 type signature. ??? We may be able to do without DEBUG_NAME altogether
800 dbxout_type_method_1 (decl, debug_name)
806 if (TREE_CODE (TREE_TYPE (decl)) == FUNCTION_TYPE)
808 else /* it's a METHOD_TYPE. */
810 tree firstarg = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)));
811 /* A for normal functions.
812 B for `const' member functions.
813 C for `volatile' member functions.
814 D for `const volatile' member functions. */
815 if (TYPE_READONLY (TREE_TYPE (firstarg)))
817 if (TYPE_VOLATILE (TREE_TYPE (firstarg)))
820 if (DECL_VINDEX (decl))
826 fprintf (asmfile, ":%s;%c%c%c", debug_name,
827 TREE_PRIVATE (decl) ? '0' : TREE_PROTECTED (decl) ? '1' : '2', c1, c2);
828 CHARS (IDENTIFIER_LENGTH (DECL_ASSEMBLER_NAME (decl)) + 6
829 - (debug_name - IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl))));
830 if (DECL_VINDEX (decl))
832 fprintf (asmfile, "%d;",
833 TREE_INT_CST_LOW (DECL_VINDEX (decl)));
834 dbxout_type (DECL_CONTEXT (decl), 0, 0);
835 fprintf (asmfile, ";");
840 /* Subroutine of `dbxout_type'. Output debug info about the methods defined
844 dbxout_type_methods (type)
847 /* C++: put out the method names and their parameter lists */
848 tree methods = TYPE_METHODS (type);
850 register tree fndecl;
852 char formatted_type_identifier_length[16];
853 register int type_identifier_length;
855 if (methods == NULL_TREE)
858 type_encoding = DECL_NAME (TYPE_NAME (type));
861 /* C++: Template classes break some assumptions made by this code about
862 the class names, constructor names, and encodings for assembler
863 label names. For now, disable output of dbx info for them. */
865 char *ptr = IDENTIFIER_POINTER (type_encoding);
866 /* This should use index. (mrs) */
867 while (*ptr && *ptr != '<') ptr++;
874 #ifdef HAVE_TEMPLATES
875 if (warn_template_debugging)
876 warning ("dbx info for template class methods not yet supported");
884 type_identifier_length = IDENTIFIER_LENGTH (type_encoding);
886 sprintf(formatted_type_identifier_length, "%d", type_identifier_length);
888 if (TREE_CODE (methods) == FUNCTION_DECL)
890 else if (TREE_VEC_ELT (methods, 0) != NULL_TREE)
891 fndecl = TREE_VEC_ELT (methods, 0);
893 fndecl = TREE_VEC_ELT (methods, 1);
897 tree name = DECL_NAME (fndecl);
900 /* Group together all the methods for the same operation.
901 These differ in the types of the arguments. */
902 for (last = NULL_TREE;
903 fndecl && (last == NULL_TREE || DECL_NAME (fndecl) == DECL_NAME (last));
904 fndecl = TREE_CHAIN (fndecl))
905 /* Output the name of the field (after overloading), as
906 well as the name of the field before overloading, along
907 with its parameter list */
909 /* This is the "mangled" name of the method.
910 It encodes the argument types. */
911 char *debug_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl));
912 int show_arg_types = 0;
918 if (DECL_IGNORED_P (fndecl))
921 if (flag_minimal_debug)
923 /* We can't optimize a method which uses an anonymous
924 class, because the debugger will not be able to
925 associate the arbitrary class name with the actual
927 if (strchr (debug_name,
928 #ifndef NO_DOLLAR_IN_LABEL
935 /* Detect ordinary methods because their mangled names
936 start with the operation name. */
937 else if (!strncmp (IDENTIFIER_POINTER (name), debug_name,
938 IDENTIFIER_LENGTH (name)))
940 debug_name += IDENTIFIER_LENGTH (name);
941 if (debug_name[0] == '_' && debug_name[1] == '_')
943 char *method_name = debug_name + 2;
944 char *length_ptr = formatted_type_identifier_length;
945 /* Get past const and volatile qualifiers. */
946 while (*method_name == 'C' || *method_name == 'V')
948 /* Skip digits for length of type_encoding. */
949 while (*method_name == *length_ptr && *length_ptr)
950 length_ptr++, method_name++;
951 if (! strncmp (method_name,
952 IDENTIFIER_POINTER (type_encoding),
953 type_identifier_length))
954 method_name += type_identifier_length;
955 debug_name = method_name;
958 /* Detect constructors by their style of name mangling. */
959 else if (debug_name[0] == '_' && debug_name[1] == '_')
961 char *ctor_name = debug_name + 2;
962 char *length_ptr = formatted_type_identifier_length;
963 while (*ctor_name == 'C' || *ctor_name == 'V')
965 /* Skip digits for length of type_encoding. */
966 while (*ctor_name == *length_ptr && *length_ptr)
967 length_ptr++, ctor_name++;
968 if (!strncmp (IDENTIFIER_POINTER (type_encoding), ctor_name,
969 type_identifier_length))
970 debug_name = ctor_name + type_identifier_length;
972 /* The other alternative is a destructor. */
976 /* Output the operation name just once, for the first method
980 fprintf (asmfile, "%s::", IDENTIFIER_POINTER (name));
981 CHARS (IDENTIFIER_LENGTH (name) + 2);
986 dbxout_type (TREE_TYPE (fndecl), 0, show_arg_types);
988 dbxout_type_method_1 (fndecl, debug_name);
998 /* Emit a "range" type specification, which has the form:
999 "r<index type>;<lower bound>;<upper bound>;".
1000 TYPE is an INTEGER_TYPE. */
1003 dbxout_range_type (type)
1006 fprintf (asmfile, "r");
1007 if (TREE_TYPE (type))
1008 dbxout_type (TREE_TYPE (type), 0, 0);
1009 else if (TREE_CODE (type) != INTEGER_TYPE)
1010 dbxout_type (type, 0, 0); /* E.g. Pascal's ARRAY [BOOLEAN] of INTEGER */
1013 /* This used to say `r1' and we used to take care
1014 to make sure that `int' was type number 1. */
1015 dbxout_type_index (integer_type_node);
1017 if (TREE_CODE (TYPE_MIN_VALUE (type)) == INTEGER_CST)
1018 fprintf (asmfile, ";%d",
1019 TREE_INT_CST_LOW (TYPE_MIN_VALUE (type)));
1021 fprintf (asmfile, ";0");
1022 if (TREE_CODE (TYPE_MAX_VALUE (type)) == INTEGER_CST)
1023 fprintf (asmfile, ";%d;",
1024 TREE_INT_CST_LOW (TYPE_MAX_VALUE (type)));
1026 fprintf (asmfile, ";-1;");
1029 /* Output a reference to a type. If the type has not yet been
1030 described in the dbx output, output its definition now.
1031 For a type already defined, just refer to its definition
1032 using the type number.
1034 If FULL is nonzero, and the type has been described only with
1035 a forward-reference, output the definition now.
1036 If FULL is zero in this case, just refer to the forward-reference
1037 using the number previously allocated.
1039 If SHOW_ARG_TYPES is nonzero, we output a description of the argument
1040 types for a METHOD_TYPE. */
1043 dbxout_type (type, full, show_arg_types)
1049 static int anonymous_type_number = 0;
1051 /* If there was an input error and we don't really have a type,
1052 avoid crashing and write something that is at least valid
1053 by assuming `int'. */
1054 if (type == error_mark_node)
1055 type = integer_type_node;
1058 type = TYPE_MAIN_VARIANT (type);
1059 if (TYPE_NAME (type)
1060 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1061 && TYPE_DECL_SUPPRESS_DEBUG (TYPE_NAME (type)))
1065 if (TYPE_SYMTAB_ADDRESS (type) == 0)
1067 /* Type has no dbx number assigned. Assign next available number. */
1068 TYPE_SYMTAB_ADDRESS (type) = next_type_number++;
1070 /* Make sure type vector is long enough to record about this type. */
1072 if (next_type_number == typevec_len)
1075 (struct typeinfo *) xrealloc (typevec,
1076 typevec_len * 2 * sizeof typevec[0]);
1077 bzero ((char *) (typevec + typevec_len),
1078 typevec_len * sizeof typevec[0]);
1082 #ifdef DBX_USE_BINCL
1083 typevec[TYPE_SYMTAB_ADDRESS (type)].file_number =
1084 current_file->file_number;
1085 typevec[TYPE_SYMTAB_ADDRESS (type)].type_number =
1086 current_file->next_type_number++;
1090 /* Output the number of this type, to refer to it. */
1091 dbxout_type_index (type);
1093 #ifdef DBX_TYPE_DEFINED
1094 if (DBX_TYPE_DEFINED (type))
1098 /* If this type's definition has been output or is now being output,
1101 switch (typevec[TYPE_SYMTAB_ADDRESS (type)].status)
1106 /* If we have already had a cross reference,
1107 and either that's all we want or that's the best we could do,
1108 don't repeat the cross reference.
1109 Sun dbx crashes if we do. */
1110 if (! full || TYPE_SIZE (type) == 0
1111 /* No way in DBX fmt to describe a variable size. */
1112 || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
1120 /* For systems where dbx output does not allow the `=xsNAME:' syntax,
1121 leave the type-number completely undefined rather than output
1122 a cross-reference. If we have already used GNU debug info extensions,
1123 then it is OK to output a cross reference. This is necessary to get
1124 proper C++ debug output. */
1125 if ((TREE_CODE (type) == RECORD_TYPE || TREE_CODE (type) == UNION_TYPE
1126 || TREE_CODE (type) == QUAL_UNION_TYPE
1127 || TREE_CODE (type) == ENUMERAL_TYPE)
1128 && ! use_gnu_debug_info_extensions)
1129 /* We must use the same test here as we use twice below when deciding
1130 whether to emit a cross-reference. */
1131 if ((TYPE_NAME (type) != 0
1132 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1133 && DECL_IGNORED_P (TYPE_NAME (type)))
1135 || TYPE_SIZE (type) == 0
1136 /* No way in DBX fmt to describe a variable size. */
1137 || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
1139 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_XREF;
1144 /* Output a definition now. */
1146 fprintf (asmfile, "=");
1149 /* Mark it as defined, so that if it is self-referent
1150 we will not get into an infinite recursion of definitions. */
1152 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_DEFINED;
1154 switch (TREE_CODE (type))
1158 /* For a void type, just define it as itself; ie, "5=5".
1159 This makes us consider it defined
1160 without saying what it is. The debugger will make it
1161 a void type when the reference is seen, and nothing will
1162 ever override that default. */
1163 dbxout_type_index (type);
1167 if (type == char_type_node && ! TREE_UNSIGNED (type))
1169 /* Output the type `char' as a subrange of itself!
1170 I don't understand this definition, just copied it
1171 from the output of pcc.
1172 This used to use `r2' explicitly and we used to
1173 take care to make sure that `char' was type number 2. */
1174 fprintf (asmfile, "r");
1175 dbxout_type_index (type);
1176 fprintf (asmfile, ";0;127;");
1178 else if (use_gnu_debug_info_extensions
1179 && (TYPE_PRECISION (type) > TYPE_PRECISION (integer_type_node)
1180 || TYPE_PRECISION (type) > HOST_BITS_PER_WIDE_INT))
1182 /* This used to say `r1' and we used to take care
1183 to make sure that `int' was type number 1. */
1184 fprintf (asmfile, "r");
1185 dbxout_type_index (integer_type_node);
1186 fprintf (asmfile, ";");
1187 print_int_cst_octal (TYPE_MIN_VALUE (type));
1188 fprintf (asmfile, ";");
1189 print_int_cst_octal (TYPE_MAX_VALUE (type));
1190 fprintf (asmfile, ";");
1192 else /* Output other integer types as subranges of `int'. */
1193 dbxout_range_type (type);
1198 /* This used to say `r1' and we used to take care
1199 to make sure that `int' was type number 1. */
1200 fprintf (asmfile, "r");
1201 dbxout_type_index (integer_type_node);
1202 fprintf (asmfile, ";%d;0;", int_size_in_bytes (type));
1207 if (use_gnu_debug_info_extensions)
1208 fprintf (asmfile, "@s%d;-20;",
1209 BITS_PER_UNIT * int_size_in_bytes (type));
1212 /* Output the type `char' as a subrange of itself.
1213 That is what pcc seems to do. */
1214 fprintf (asmfile, "r");
1215 dbxout_type_index (char_type_node);
1216 fprintf (asmfile, ";0;%d;", TREE_UNSIGNED (type) ? 255 : 127);
1222 if (use_gnu_debug_info_extensions)
1223 fprintf (asmfile, "@s%d;-16;",
1224 BITS_PER_UNIT * int_size_in_bytes (type));
1225 else /* Define as enumeral type (False, True) */
1226 fprintf (asmfile, "eFalse:0,True:1,;");
1231 putc ('d', asmfile);
1233 dbxout_type (TREE_TYPE (type), 0, 0);
1237 /* Differs from the REAL_TYPE by its new data type number */
1239 if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE)
1241 fprintf (asmfile, "r");
1242 dbxout_type_index (type);
1243 fprintf (asmfile, ";%d;0;",
1244 int_size_in_bytes (TREE_TYPE (type)));
1245 CHARS (12); /* The number is probably incorrect here. */
1249 /* Output a complex integer type as a structure,
1250 pending some other way to do it. */
1251 fprintf (asmfile, "s%d", int_size_in_bytes (type));
1253 fprintf (asmfile, "real:");
1255 dbxout_type (TREE_TYPE (type), 0, 0);
1256 fprintf (asmfile, ",%d,%d;",
1257 0, TYPE_PRECISION (TREE_TYPE (type)));
1259 fprintf (asmfile, "imag:");
1261 dbxout_type (TREE_TYPE (type), 0, 0);
1262 fprintf (asmfile, ",%d,%d;;",
1263 TYPE_PRECISION (TREE_TYPE (type)),
1264 TYPE_PRECISION (TREE_TYPE (type)));
1270 if (use_gnu_debug_info_extensions)
1272 have_used_extensions = 1;
1273 fprintf (asmfile, "@s%d;",
1274 BITS_PER_UNIT * int_size_in_bytes (type));
1275 /* Check if a bitstring type, which in Chill is
1276 different from a [power]set. */
1277 if (TYPE_STRING_FLAG (type))
1278 fprintf (asmfile, "@S;");
1280 putc ('S', asmfile);
1282 dbxout_type (TYPE_DOMAIN (type), 0, 0);
1286 /* Output "a" followed by a range type definition
1287 for the index type of the array
1288 followed by a reference to the target-type.
1289 ar1;0;N;M for a C array of type M and size N+1. */
1290 /* Check if a character string type, which in Chill is
1291 different from an array of characters. */
1292 if (TYPE_STRING_FLAG (type) && use_gnu_debug_info_extensions)
1294 have_used_extensions = 1;
1295 fprintf (asmfile, "@S;");
1297 tem = TYPE_DOMAIN (type);
1300 fprintf (asmfile, "ar");
1301 dbxout_type_index (integer_type_node);
1302 fprintf (asmfile, ";0;-1;");
1306 fprintf (asmfile, "a");
1307 dbxout_range_type (tem);
1310 dbxout_type (TREE_TYPE (type), 0, 0);
1315 case QUAL_UNION_TYPE:
1317 int i, n_baseclasses = 0;
1319 if (TYPE_BINFO (type) != 0 && TYPE_BINFO_BASETYPES (type) != 0)
1320 n_baseclasses = TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type));
1322 /* Output a structure type. We must use the same test here as we
1323 use in the DBX_NO_XREFS case above. */
1324 if ((TYPE_NAME (type) != 0
1325 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1326 && DECL_IGNORED_P (TYPE_NAME (type)))
1328 || TYPE_SIZE (type) == 0
1329 /* No way in DBX fmt to describe a variable size. */
1330 || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
1332 /* If the type is just a cross reference, output one
1333 and mark the type as partially described.
1334 If it later becomes defined, we will output
1335 its real definition.
1336 If the type has a name, don't nest its definition within
1337 another type's definition; instead, output an xref
1338 and let the definition come when the name is defined. */
1339 fprintf (asmfile, (TREE_CODE (type) == RECORD_TYPE) ? "xs" : "xu");
1341 #if 0 /* This assertion is legitimately false in C++. */
1342 /* We shouldn't be outputting a reference to a type before its
1343 definition unless the type has a tag name.
1344 A typedef name without a tag name should be impossible. */
1345 if (TREE_CODE (TYPE_NAME (type)) != IDENTIFIER_NODE)
1348 if (TYPE_NAME (type) != 0)
1349 dbxout_type_name (type);
1351 fprintf (asmfile, "$$%d", anonymous_type_number++);
1352 fprintf (asmfile, ":");
1353 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_XREF;
1357 /* Identify record or union, and print its size. */
1358 fprintf (asmfile, (TREE_CODE (type) == RECORD_TYPE) ? "s%d" : "u%d",
1359 int_size_in_bytes (type));
1361 if (use_gnu_debug_info_extensions)
1365 have_used_extensions = 1;
1366 fprintf (asmfile, "!%d,", n_baseclasses);
1370 for (i = 0; i < n_baseclasses; i++)
1372 tree child = TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (type)), i);
1373 if (use_gnu_debug_info_extensions)
1375 have_used_extensions = 1;
1376 putc (TREE_VIA_VIRTUAL (child) ? '1'
1379 putc (TREE_VIA_PUBLIC (child) ? '2'
1382 fprintf (asmfile, "%d,",
1383 TREE_INT_CST_LOW (BINFO_OFFSET (child)) * BITS_PER_UNIT);
1385 dbxout_type (BINFO_TYPE (child), 0, 0);
1386 putc (';', asmfile);
1390 /* Print out the base class information with fields
1391 which have the same names at the types they hold. */
1392 dbxout_type_name (BINFO_TYPE (child));
1393 putc (':', asmfile);
1394 dbxout_type (BINFO_TYPE (child), full, 0);
1395 fprintf (asmfile, ",%d,%d;",
1396 TREE_INT_CST_LOW (BINFO_OFFSET (child)) * BITS_PER_UNIT,
1397 TREE_INT_CST_LOW (DECL_SIZE (TYPE_NAME (BINFO_TYPE (child)))) * BITS_PER_UNIT);
1405 /* Write out the field declarations. */
1406 dbxout_type_fields (type);
1407 if (use_gnu_debug_info_extensions && TYPE_METHODS (type) != NULL_TREE)
1409 have_used_extensions = 1;
1410 dbxout_type_methods (type);
1412 putc (';', asmfile);
1414 if (use_gnu_debug_info_extensions && TREE_CODE (type) == RECORD_TYPE
1415 /* Avoid the ~ if we don't really need it--it confuses dbx. */
1416 && TYPE_VFIELD (type))
1418 have_used_extensions = 1;
1420 /* Tell GDB+ that it may keep reading. */
1421 putc ('~', asmfile);
1423 /* We need to write out info about what field this class
1424 uses as its "main" vtable pointer field, because if this
1425 field is inherited from a base class, GDB cannot necessarily
1426 figure out which field it's using in time. */
1427 if (TYPE_VFIELD (type))
1429 putc ('%', asmfile);
1430 dbxout_type (DECL_FCONTEXT (TYPE_VFIELD (type)), 0, 0);
1432 putc (';', asmfile);
1438 /* We must use the same test here as we use in the DBX_NO_XREFS case
1439 above. We simplify it a bit since an enum will never have a variable
1441 if ((TYPE_NAME (type) != 0
1442 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1443 && DECL_IGNORED_P (TYPE_NAME (type)))
1445 || TYPE_SIZE (type) == 0)
1447 fprintf (asmfile, "xe");
1449 dbxout_type_name (type);
1450 typevec[TYPE_SYMTAB_ADDRESS (type)].status = TYPE_XREF;
1451 fprintf (asmfile, ":");
1454 #ifdef DBX_OUTPUT_ENUM
1455 DBX_OUTPUT_ENUM (asmfile, type);
1457 if (use_gnu_debug_info_extensions
1458 && TYPE_PRECISION (type) != TYPE_PRECISION (integer_type_node))
1459 fprintf (asmfile, "@s%d;", TYPE_PRECISION (type));
1460 putc ('e', asmfile);
1462 for (tem = TYPE_VALUES (type); tem; tem = TREE_CHAIN (tem))
1464 fprintf (asmfile, "%s:", IDENTIFIER_POINTER (TREE_PURPOSE (tem)));
1465 if (TREE_INT_CST_HIGH (TREE_VALUE (tem)) == 0)
1466 fprintf (asmfile, "%lu",
1467 (unsigned long) TREE_INT_CST_LOW (TREE_VALUE (tem)));
1468 else if (TREE_INT_CST_HIGH (TREE_VALUE (tem)) == -1
1469 && TREE_INT_CST_LOW (TREE_VALUE (tem)) < 0)
1470 fprintf (asmfile, "%ld",
1471 (long) TREE_INT_CST_LOW (TREE_VALUE (tem)));
1473 print_int_cst_octal (TREE_VALUE (tem));
1474 fprintf (asmfile, ",");
1475 CHARS (20 + IDENTIFIER_LENGTH (TREE_PURPOSE (tem)));
1476 if (TREE_CHAIN (tem) != 0)
1479 putc (';', asmfile);
1485 putc ('*', asmfile);
1487 dbxout_type (TREE_TYPE (type), 0, 0);
1491 if (use_gnu_debug_info_extensions)
1493 have_used_extensions = 1;
1494 putc ('#', asmfile);
1496 if (flag_minimal_debug && !show_arg_types)
1498 /* Normally, just output the return type.
1499 The argument types are encoded in the method name. */
1500 putc ('#', asmfile);
1501 dbxout_type (TREE_TYPE (type), 0, 0);
1502 putc (';', asmfile);
1507 /* When outputting destructors, we need to write
1508 the argument types out longhand. */
1509 dbxout_type (TYPE_METHOD_BASETYPE (type), 0, 0);
1510 putc (',', asmfile);
1512 dbxout_type (TREE_TYPE (type), 0, 0);
1513 dbxout_args (TYPE_ARG_TYPES (type));
1514 putc (';', asmfile);
1520 /* Treat it as a function type. */
1521 dbxout_type (TREE_TYPE (type), 0, 0);
1526 if (use_gnu_debug_info_extensions)
1528 have_used_extensions = 1;
1529 putc ('@', asmfile);
1531 dbxout_type (TYPE_OFFSET_BASETYPE (type), 0, 0);
1532 putc (',', asmfile);
1534 dbxout_type (TREE_TYPE (type), 0, 0);
1538 /* Should print as an int, because it is really
1540 dbxout_type (integer_type_node, 0, 0);
1544 case REFERENCE_TYPE:
1545 if (use_gnu_debug_info_extensions)
1546 have_used_extensions = 1;
1547 putc (use_gnu_debug_info_extensions ? '&' : '*', asmfile);
1549 dbxout_type (TREE_TYPE (type), 0, 0);
1553 putc ('f', asmfile);
1555 dbxout_type (TREE_TYPE (type), 0, 0);
1563 /* Print the value of integer constant C, in octal,
1564 handling double precision. */
1567 print_int_cst_octal (c)
1570 unsigned HOST_WIDE_INT high = TREE_INT_CST_HIGH (c);
1571 unsigned HOST_WIDE_INT low = TREE_INT_CST_LOW (c);
1572 int excess = (3 - (HOST_BITS_PER_WIDE_INT % 3));
1573 int width = TYPE_PRECISION (TREE_TYPE (c));
1575 /* GDB wants constants with no extra leading "1" bits, so
1576 we need to remove any sign-extension that might be
1578 if (width == HOST_BITS_PER_WIDE_INT * 2)
1580 else if (width > HOST_BITS_PER_WIDE_INT)
1581 high &= (((HOST_WIDE_INT) 1 << (width - HOST_BITS_PER_WIDE_INT)) - 1);
1582 else if (width == HOST_BITS_PER_WIDE_INT)
1585 high = 0, low &= (((HOST_WIDE_INT) 1 << width) - 1);
1587 fprintf (asmfile, "0");
1591 print_octal (high, HOST_BITS_PER_WIDE_INT / 3);
1592 print_octal (low, HOST_BITS_PER_WIDE_INT / 3);
1596 unsigned HOST_WIDE_INT beg = high >> excess;
1597 unsigned HOST_WIDE_INT middle
1598 = ((high & (((HOST_WIDE_INT) 1 << excess) - 1)) << (3 - excess)
1599 | (low >> (HOST_BITS_PER_WIDE_INT / 3 * 3)));
1600 unsigned HOST_WIDE_INT end
1601 = low & (((unsigned HOST_WIDE_INT) 1
1602 << (HOST_BITS_PER_WIDE_INT / 3 * 3))
1605 fprintf (asmfile, "%o%01o", beg, middle);
1606 print_octal (end, HOST_BITS_PER_WIDE_INT / 3);
1611 print_octal (value, digits)
1612 unsigned HOST_WIDE_INT value;
1617 for (i = digits - 1; i >= 0; i--)
1618 fprintf (asmfile, "%01o", ((value >> (3 * i)) & 7));
1621 /* Output the name of type TYPE, with no punctuation.
1622 Such names can be set up either by typedef declarations
1623 or by struct, enum and union tags. */
1626 dbxout_type_name (type)
1630 if (TYPE_NAME (type) == 0)
1632 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
1634 t = TYPE_NAME (type);
1636 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
1638 t = DECL_NAME (TYPE_NAME (type));
1643 fprintf (asmfile, "%s", IDENTIFIER_POINTER (t));
1644 CHARS (IDENTIFIER_LENGTH (t));
1647 /* Output a .stabs for the symbol defined by DECL,
1648 which must be a ..._DECL node in the normal namespace.
1649 It may be a CONST_DECL, a FUNCTION_DECL, a PARM_DECL or a VAR_DECL.
1650 LOCAL is nonzero if the scope is less than the entire file. */
1653 dbxout_symbol (decl, local)
1657 tree type = TREE_TYPE (decl);
1658 tree context = NULL_TREE;
1660 /* Cast avoids warning in old compilers. */
1661 current_sym_code = (STAB_CODE_TYPE) 0;
1662 current_sym_value = 0;
1663 current_sym_addr = 0;
1665 /* Ignore nameless syms, but don't ignore type tags. */
1667 if ((DECL_NAME (decl) == 0 && TREE_CODE (decl) != TYPE_DECL)
1668 || DECL_IGNORED_P (decl))
1671 dbxout_prepare_symbol (decl);
1673 /* The output will always start with the symbol name,
1674 so always count that in the length-output-so-far. */
1676 if (DECL_NAME (decl) != 0)
1677 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (decl));
1679 switch (TREE_CODE (decl))
1682 /* Enum values are defined by defining the enum type. */
1686 if (DECL_RTL (decl) == 0)
1688 if (DECL_EXTERNAL (decl))
1690 /* Don't mention a nested function under its parent. */
1691 context = decl_function_context (decl);
1692 if (context == current_function_decl)
1694 if (GET_CODE (DECL_RTL (decl)) != MEM
1695 || GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF)
1699 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
1700 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
1701 TREE_PUBLIC (decl) ? 'F' : 'f');
1703 current_sym_code = N_FUN;
1704 current_sym_addr = XEXP (DECL_RTL (decl), 0);
1706 if (TREE_TYPE (type))
1707 dbxout_type (TREE_TYPE (type), 0, 0);
1709 dbxout_type (void_type_node, 0, 0);
1711 /* For a nested function, when that function is compiled,
1712 mention the containing function name
1713 as well as (since dbx wants it) our own assembler-name. */
1715 fprintf (asmfile, ",%s,%s",
1716 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
1717 IDENTIFIER_POINTER (DECL_NAME (context)));
1719 dbxout_finish_symbol (decl);
1724 /* This seems all wrong. Outputting most kinds of types gives no name
1725 at all. A true definition gives no name; a cross-ref for a
1726 structure can give the tag name, but not a type name.
1727 It seems that no typedef name is defined by outputting a type. */
1729 /* If this typedef name was defined by outputting the type,
1730 don't duplicate it. */
1731 if (typevec[TYPE_SYMTAB_ADDRESS (type)].status == TYPE_DEFINED
1732 && TYPE_NAME (TREE_TYPE (decl)) == decl)
1735 /* Don't output the same typedef twice.
1736 And don't output what language-specific stuff doesn't want output. */
1737 if (TREE_ASM_WRITTEN (decl) || TYPE_DECL_SUPPRESS_DEBUG (decl))
1746 if (DECL_NAME (decl))
1748 /* Nonzero means we must output a tag as well as a typedef. */
1751 /* Handle the case of a C++ structure or union
1752 where the TYPE_NAME is a TYPE_DECL
1753 which gives both a typedef name and a tag. */
1754 /* dbx requires the tag first and the typedef second. */
1755 if ((TREE_CODE (type) == RECORD_TYPE
1756 || TREE_CODE (type) == UNION_TYPE
1757 || TREE_CODE (type) == QUAL_UNION_TYPE)
1758 && TYPE_NAME (type) == decl
1759 && !(use_gnu_debug_info_extensions && have_used_extensions)
1760 && !TREE_ASM_WRITTEN (TYPE_NAME (type))
1761 /* Distinguish the implicit typedefs of C++
1762 from explicit ones that might be found in C. */
1763 && (!strcmp (lang_identify (), "cplusplus")
1764 /* The following line maybe unnecessary;
1765 in 2.6, try removing it. */
1766 || DECL_SOURCE_LINE (decl) == 0))
1768 tree name = TYPE_NAME (type);
1769 if (TREE_CODE (name) == TYPE_DECL)
1770 name = DECL_NAME (name);
1772 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1773 current_sym_value = 0;
1774 current_sym_addr = 0;
1775 current_sym_nchars = 2 + IDENTIFIER_LENGTH (name);
1777 fprintf (asmfile, "%s \"%s:T", ASM_STABS_OP,
1778 IDENTIFIER_POINTER (name));
1779 dbxout_type (type, 1, 0);
1780 dbxout_finish_symbol (NULL_TREE);
1783 /* Output typedef name. */
1784 fprintf (asmfile, "%s \"%s:", ASM_STABS_OP,
1785 IDENTIFIER_POINTER (DECL_NAME (decl)));
1787 /* Short cut way to output a tag also. */
1788 if ((TREE_CODE (type) == RECORD_TYPE
1789 || TREE_CODE (type) == UNION_TYPE
1790 || TREE_CODE (type) == QUAL_UNION_TYPE)
1791 && TYPE_NAME (type) == decl)
1793 if (use_gnu_debug_info_extensions && have_used_extensions)
1795 putc ('T', asmfile);
1796 TREE_ASM_WRITTEN (TYPE_NAME (type)) = 1;
1798 #if 0 /* Now we generate the tag for this case up above. */
1804 putc ('t', asmfile);
1805 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1807 dbxout_type (type, 1, 0);
1808 dbxout_finish_symbol (decl);
1812 /* Don't output a tag if this is an incomplete type (TYPE_SIZE is
1813 zero). This prevents the sun4 Sun OS 4.x dbx from crashing. */
1815 if (tag_needed && TYPE_NAME (type) != 0
1816 && (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE
1817 || (DECL_NAME (TYPE_NAME (type)) != 0))
1818 && TYPE_SIZE (type) != 0
1819 && !TREE_ASM_WRITTEN (TYPE_NAME (type)))
1821 /* For a TYPE_DECL with no name, but the type has a name,
1823 This is what represents `struct foo' with no typedef. */
1824 /* In C++, the name of a type is the corresponding typedef.
1825 In C, it is an IDENTIFIER_NODE. */
1826 tree name = TYPE_NAME (type);
1827 if (TREE_CODE (name) == TYPE_DECL)
1828 name = DECL_NAME (name);
1830 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1831 current_sym_value = 0;
1832 current_sym_addr = 0;
1833 current_sym_nchars = 2 + IDENTIFIER_LENGTH (name);
1835 fprintf (asmfile, "%s \"%s:T", ASM_STABS_OP,
1836 IDENTIFIER_POINTER (name));
1837 dbxout_type (type, 1, 0);
1838 dbxout_finish_symbol (NULL_TREE);
1842 /* If an enum type has no name, it cannot be referred to,
1843 but we must output it anyway, since the enumeration constants
1844 can be referred to. */
1845 if (!did_output && TREE_CODE (type) == ENUMERAL_TYPE)
1847 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1848 current_sym_value = 0;
1849 current_sym_addr = 0;
1850 current_sym_nchars = 2;
1852 /* Some debuggers fail when given NULL names, so give this a
1853 harmless name of ` '. */
1854 fprintf (asmfile, "%s \" :T", ASM_STABS_OP);
1855 dbxout_type (type, 1, 0);
1856 dbxout_finish_symbol (NULL_TREE);
1859 /* Prevent duplicate output of a typedef. */
1860 TREE_ASM_WRITTEN (decl) = 1;
1865 /* Parm decls go in their own separate chains
1866 and are output by dbxout_reg_parms and dbxout_parms. */
1870 /* Named return value, treat like a VAR_DECL. */
1872 if (DECL_RTL (decl) == 0)
1874 /* Don't mention a variable that is external.
1875 Let the file that defines it describe it. */
1876 if (DECL_EXTERNAL (decl))
1879 /* If the variable is really a constant
1880 and not written in memory, inform the debugger. */
1881 if (TREE_STATIC (decl) && TREE_READONLY (decl)
1882 && DECL_INITIAL (decl) != 0
1883 && ! TREE_ASM_WRITTEN (decl)
1884 && (DECL_FIELD_CONTEXT (decl) == NULL_TREE
1885 || TREE_CODE (DECL_FIELD_CONTEXT (decl)) == BLOCK))
1887 if (TREE_PUBLIC (decl) == 0)
1889 /* The sun4 assembler does not grok this. */
1890 char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
1891 if (TREE_CODE (TREE_TYPE (decl)) == INTEGER_TYPE
1892 || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE)
1894 HOST_WIDE_INT ival = TREE_INT_CST_LOW (DECL_INITIAL (decl));
1895 #ifdef DBX_OUTPUT_CONSTANT_SYMBOL
1896 DBX_OUTPUT_CONSTANT_SYMBOL (asmfile, name, ival);
1898 fprintf (asmfile, "%s \"%s:c=i%d\",0x%x,0,0,0\n",
1899 ASM_STABS_OP, name, ival, N_LSYM);
1903 else if (TREE_CODE (TREE_TYPE (decl)) == REAL_TYPE)
1905 /* don't know how to do this yet. */
1909 /* else it is something we handle like a normal variable. */
1912 DECL_RTL (decl) = eliminate_regs (DECL_RTL (decl), 0, NULL_RTX);
1913 #ifdef LEAF_REG_REMAP
1915 leaf_renumber_regs_insn (DECL_RTL (decl));
1918 dbxout_symbol_location (decl, type, 0, DECL_RTL (decl));
1922 /* Output the stab for DECL, a VAR_DECL, RESULT_DECL or PARM_DECL.
1923 Add SUFFIX to its name, if SUFFIX is not 0.
1924 Describe the variable as residing in HOME
1925 (usually HOME is DECL_RTL (DECL), but not always). */
1928 dbxout_symbol_location (decl, type, suffix, home)
1936 /* Don't mention a variable at all
1937 if it was completely optimized into nothingness.
1939 If the decl was from an inline function, then it's rtl
1940 is not identically the rtl that was used in this
1941 particular compilation. */
1942 if (GET_CODE (home) == REG)
1944 regno = REGNO (home);
1945 if (regno >= FIRST_PSEUDO_REGISTER)
1948 else if (GET_CODE (home) == SUBREG)
1952 while (GET_CODE (value) == SUBREG)
1954 offset += SUBREG_WORD (value);
1955 value = SUBREG_REG (value);
1957 if (GET_CODE (value) == REG)
1959 regno = REGNO (value);
1960 if (regno >= FIRST_PSEUDO_REGISTER)
1964 alter_subreg (home);
1967 /* The kind-of-variable letter depends on where
1968 the variable is and on the scope of its name:
1969 G and N_GSYM for static storage and global scope,
1970 S for static storage and file scope,
1971 V for static storage and local scope,
1972 for those two, use N_LCSYM if data is in bss segment,
1973 N_STSYM if in data segment, N_FUN otherwise.
1974 (We used N_FUN originally, then changed to N_STSYM
1975 to please GDB. However, it seems that confused ld.
1976 Now GDB has been fixed to like N_FUN, says Kingdon.)
1977 no letter at all, and N_LSYM, for auto variable,
1978 r and N_RSYM for register variable. */
1980 if (GET_CODE (home) == MEM
1981 && GET_CODE (XEXP (home, 0)) == SYMBOL_REF)
1983 if (TREE_PUBLIC (decl))
1986 current_sym_code = N_GSYM;
1990 current_sym_addr = XEXP (home, 0);
1992 letter = decl_function_context (decl) ? 'V' : 'S';
1994 /* This should be the same condition as in assemble_variable, but
1995 we don't have access to dont_output_data here. So, instead,
1996 we rely on the fact that error_mark_node initializers always
1997 end up in bss for C++ and never end up in bss for C. */
1998 if (DECL_INITIAL (decl) == 0
1999 || (!strcmp (lang_identify (), "cplusplus")
2000 && DECL_INITIAL (decl) == error_mark_node))
2001 current_sym_code = N_LCSYM;
2002 else if (DECL_IN_TEXT_SECTION (decl))
2003 /* This is not quite right, but it's the closest
2004 of all the codes that Unix defines. */
2005 current_sym_code = DBX_STATIC_CONST_VAR_CODE;
2008 /* Ultrix `as' seems to need this. */
2009 #ifdef DBX_STATIC_STAB_DATA_SECTION
2012 current_sym_code = N_STSYM;
2016 else if (regno >= 0)
2019 current_sym_code = N_RSYM;
2020 current_sym_value = DBX_REGISTER_NUMBER (regno);
2022 else if (GET_CODE (home) == MEM
2023 && (GET_CODE (XEXP (home, 0)) == MEM
2024 || (GET_CODE (XEXP (home, 0)) == REG
2025 && REGNO (XEXP (home, 0)) != HARD_FRAME_POINTER_REGNUM)))
2026 /* If the value is indirect by memory or by a register
2027 that isn't the frame pointer
2028 then it means the object is variable-sized and address through
2029 that register or stack slot. DBX has no way to represent this
2030 so all we can do is output the variable as a pointer.
2031 If it's not a parameter, ignore it.
2032 (VAR_DECLs like this can be made by integrate.c.) */
2034 if (GET_CODE (XEXP (home, 0)) == REG)
2037 current_sym_code = N_RSYM;
2038 current_sym_value = DBX_REGISTER_NUMBER (REGNO (XEXP (home, 0)));
2042 current_sym_code = N_LSYM;
2043 /* RTL looks like (MEM (MEM (PLUS (REG...) (CONST_INT...)))).
2044 We want the value of that CONST_INT. */
2046 = DEBUGGER_AUTO_OFFSET (XEXP (XEXP (home, 0), 0));
2049 /* Effectively do build_pointer_type, but don't cache this type,
2050 since it might be temporary whereas the type it points to
2051 might have been saved for inlining. */
2052 /* Don't use REFERENCE_TYPE because dbx can't handle that. */
2053 type = make_node (POINTER_TYPE);
2054 TREE_TYPE (type) = TREE_TYPE (decl);
2056 else if (GET_CODE (home) == MEM
2057 && GET_CODE (XEXP (home, 0)) == REG)
2059 current_sym_code = N_LSYM;
2060 current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0));
2062 else if (GET_CODE (home) == MEM
2063 && GET_CODE (XEXP (home, 0)) == PLUS
2064 && GET_CODE (XEXP (XEXP (home, 0), 1)) == CONST_INT)
2066 current_sym_code = N_LSYM;
2067 /* RTL looks like (MEM (PLUS (REG...) (CONST_INT...)))
2068 We want the value of that CONST_INT. */
2069 current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0));
2071 else if (GET_CODE (home) == MEM
2072 && GET_CODE (XEXP (home, 0)) == CONST)
2074 /* Handle an obscure case which can arise when optimizing and
2075 when there are few available registers. (This is *always*
2076 the case for i386/i486 targets). The RTL looks like
2077 (MEM (CONST ...)) even though this variable is a local `auto'
2078 or a local `register' variable. In effect, what has happened
2079 is that the reload pass has seen that all assignments and
2080 references for one such a local variable can be replaced by
2081 equivalent assignments and references to some static storage
2082 variable, thereby avoiding the need for a register. In such
2083 cases we're forced to lie to debuggers and tell them that
2084 this variable was itself `static'. */
2085 current_sym_code = N_LCSYM;
2087 current_sym_addr = XEXP (XEXP (home, 0), 0);
2089 else if (GET_CODE (home) == CONCAT)
2091 tree subtype = TREE_TYPE (type);
2093 /* If the variable's storage is in two parts,
2094 output each as a separate stab with a modified name. */
2095 if (WORDS_BIG_ENDIAN)
2096 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 0));
2098 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 0));
2100 /* Cast avoids warning in old compilers. */
2101 current_sym_code = (STAB_CODE_TYPE) 0;
2102 current_sym_value = 0;
2103 current_sym_addr = 0;
2104 dbxout_prepare_symbol (decl);
2106 if (WORDS_BIG_ENDIAN)
2107 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 1));
2109 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 1));
2113 /* Address might be a MEM, when DECL is a variable-sized object.
2114 Or it might be const0_rtx, meaning previous passes
2115 want us to ignore this variable. */
2118 /* Ok, start a symtab entry and output the variable name. */
2121 #ifdef DBX_STATIC_BLOCK_START
2122 DBX_STATIC_BLOCK_START (asmfile, current_sym_code);
2125 dbxout_symbol_name (decl, suffix, letter);
2126 dbxout_type (type, 0, 0);
2127 dbxout_finish_symbol (decl);
2129 #ifdef DBX_STATIC_BLOCK_END
2130 DBX_STATIC_BLOCK_END (asmfile, current_sym_code);
2134 /* Output the symbol name of DECL for a stabs, with suffix SUFFIX.
2135 Then output LETTER to indicate the kind of location the symbol has. */
2138 dbxout_symbol_name (decl, suffix, letter)
2143 /* One slight hitch: if this is a VAR_DECL which is a static
2144 class member, we must put out the mangled name instead of the
2145 DECL_NAME. Note also that static member (variable) names DO NOT begin
2146 with underscores in .stabs directives. */
2147 char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
2150 fprintf (asmfile, "%s \"%s%s:", ASM_STABS_OP, name,
2151 (suffix ? suffix : ""));
2153 if (letter) putc (letter, asmfile);
2157 dbxout_prepare_symbol (decl)
2161 char *filename = DECL_SOURCE_FILE (decl);
2163 dbxout_source_file (asmfile, filename);
2168 dbxout_finish_symbol (sym)
2171 #ifdef DBX_FINISH_SYMBOL
2172 DBX_FINISH_SYMBOL (sym);
2175 if (use_gnu_debug_info_extensions && sym != 0)
2176 line = DECL_SOURCE_LINE (sym);
2178 fprintf (asmfile, "\",%d,0,%d,", current_sym_code, line);
2179 if (current_sym_addr)
2180 output_addr_const (asmfile, current_sym_addr);
2182 fprintf (asmfile, "%d", current_sym_value);
2183 putc ('\n', asmfile);
2187 /* Output definitions of all the decls in a chain. */
2195 dbxout_symbol (syms, 1);
2196 syms = TREE_CHAIN (syms);
2200 /* The following two functions output definitions of function parameters.
2201 Each parameter gets a definition locating it in the parameter list.
2202 Each parameter that is a register variable gets a second definition
2203 locating it in the register.
2205 Printing or argument lists in gdb uses the definitions that
2206 locate in the parameter list. But reference to the variable in
2207 expressions uses preferentially the definition as a register. */
2209 /* Output definitions, referring to storage in the parmlist,
2210 of all the parms in PARMS, which is a chain of PARM_DECL nodes. */
2213 dbxout_parms (parms)
2216 for (; parms; parms = TREE_CHAIN (parms))
2217 if (DECL_NAME (parms) && TREE_TYPE (parms) != error_mark_node)
2219 dbxout_prepare_symbol (parms);
2221 /* Perform any necessary register eliminations on the parameter's rtl,
2222 so that the debugging output will be accurate. */
2223 DECL_INCOMING_RTL (parms)
2224 = eliminate_regs (DECL_INCOMING_RTL (parms), 0, NULL_RTX);
2225 DECL_RTL (parms) = eliminate_regs (DECL_RTL (parms), 0, NULL_RTX);
2226 #ifdef LEAF_REG_REMAP
2229 leaf_renumber_regs_insn (DECL_INCOMING_RTL (parms));
2230 leaf_renumber_regs_insn (DECL_RTL (parms));
2234 if (PARM_PASSED_IN_MEMORY (parms))
2236 rtx addr = XEXP (DECL_INCOMING_RTL (parms), 0);
2238 /* ??? Here we assume that the parm address is indexed
2239 off the frame pointer or arg pointer.
2240 If that is not true, we produce meaningless results,
2241 but do not crash. */
2242 if (GET_CODE (addr) == PLUS
2243 && GET_CODE (XEXP (addr, 1)) == CONST_INT)
2244 current_sym_value = INTVAL (XEXP (addr, 1));
2246 current_sym_value = 0;
2248 current_sym_code = N_PSYM;
2249 current_sym_addr = 0;
2252 if (DECL_NAME (parms))
2254 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms));
2256 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2257 IDENTIFIER_POINTER (DECL_NAME (parms)),
2258 DBX_MEMPARM_STABS_LETTER);
2262 current_sym_nchars = 8;
2263 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2264 DBX_MEMPARM_STABS_LETTER);
2267 dbxout_type (DECL_ARG_TYPE (parms), 0, 0);
2268 current_sym_value = DEBUGGER_ARG_OFFSET (current_sym_value, addr);
2269 dbxout_finish_symbol (parms);
2271 else if (GET_CODE (DECL_RTL (parms)) == REG)
2274 char regparm_letter;
2276 /* Parm passed in registers and lives in registers or nowhere. */
2278 current_sym_code = DBX_REGPARM_STABS_CODE;
2279 regparm_letter = DBX_REGPARM_STABS_LETTER;
2280 current_sym_addr = 0;
2282 /* If parm lives in a register, use that register;
2283 pretend the parm was passed there. It would be more consistent
2284 to describe the register where the parm was passed,
2285 but in practice that register usually holds something else.
2287 If we use DECL_RTL, then we must use the declared type of
2288 the variable, not the type that it arrived in. */
2289 if (REGNO (DECL_RTL (parms)) >= 0
2290 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
2292 best_rtl = DECL_RTL (parms);
2293 parm_type = TREE_TYPE (parms);
2295 /* If the parm lives nowhere, use the register where it was
2296 passed. It is also better to use the declared type here. */
2299 best_rtl = DECL_INCOMING_RTL (parms);
2300 parm_type = TREE_TYPE (parms);
2302 current_sym_value = DBX_REGISTER_NUMBER (REGNO (best_rtl));
2305 if (DECL_NAME (parms))
2307 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms));
2308 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2309 IDENTIFIER_POINTER (DECL_NAME (parms)),
2314 current_sym_nchars = 8;
2315 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2319 dbxout_type (parm_type, 0, 0);
2320 dbxout_finish_symbol (parms);
2322 else if (GET_CODE (DECL_RTL (parms)) == MEM
2323 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
2324 && REGNO (XEXP (DECL_RTL (parms), 0)) != HARD_FRAME_POINTER_REGNUM
2325 && REGNO (XEXP (DECL_RTL (parms), 0)) != STACK_POINTER_REGNUM
2326 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
2327 && REGNO (XEXP (DECL_RTL (parms), 0)) != ARG_POINTER_REGNUM
2331 /* Parm was passed via invisible reference.
2332 That is, its address was passed in a register.
2333 Output it as if it lived in that register.
2334 The debugger will know from the type
2335 that it was actually passed by invisible reference. */
2337 char regparm_letter;
2338 /* Parm passed in registers and lives in registers or nowhere. */
2340 current_sym_code = DBX_REGPARM_STABS_CODE;
2341 if (use_gnu_debug_info_extensions)
2342 regparm_letter = GDB_INV_REF_REGPARM_STABS_LETTER;
2344 regparm_letter = DBX_REGPARM_STABS_LETTER;
2346 /* DECL_RTL looks like (MEM (REG...). Get the register number.
2347 If it is an unallocated pseudo-reg, then use the register where
2348 it was passed instead. */
2349 if (REGNO (XEXP (DECL_RTL (parms), 0)) >= 0
2350 && REGNO (XEXP (DECL_RTL (parms), 0)) < FIRST_PSEUDO_REGISTER)
2351 current_sym_value = REGNO (XEXP (DECL_RTL (parms), 0));
2353 current_sym_value = REGNO (DECL_INCOMING_RTL (parms));
2355 current_sym_addr = 0;
2358 if (DECL_NAME (parms))
2360 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2362 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2363 IDENTIFIER_POINTER (DECL_NAME (parms)),
2368 current_sym_nchars = 8;
2369 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2373 dbxout_type (TREE_TYPE (parms), 0, 0);
2374 dbxout_finish_symbol (parms);
2376 else if (GET_CODE (DECL_RTL (parms)) == MEM
2377 && XEXP (DECL_RTL (parms), 0) != const0_rtx
2378 /* ??? A constant address for a parm can happen
2379 when the reg it lives in is equiv to a constant in memory.
2380 Should make this not happen, after 2.4. */
2381 && ! CONSTANT_P (XEXP (DECL_RTL (parms), 0)))
2383 /* Parm was passed in registers but lives on the stack. */
2385 current_sym_code = N_PSYM;
2386 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))),
2387 in which case we want the value of that CONST_INT,
2388 or (MEM (REG ...)) or (MEM (MEM ...)),
2389 in which case we use a value of zero. */
2390 if (GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
2391 || GET_CODE (XEXP (DECL_RTL (parms), 0)) == MEM)
2392 current_sym_value = 0;
2394 current_sym_value = INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1));
2395 current_sym_addr = 0;
2398 if (DECL_NAME (parms))
2400 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2402 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2403 IDENTIFIER_POINTER (DECL_NAME (parms)),
2404 DBX_MEMPARM_STABS_LETTER);
2408 current_sym_nchars = 8;
2409 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2410 DBX_MEMPARM_STABS_LETTER);
2414 = DEBUGGER_ARG_OFFSET (current_sym_value,
2415 XEXP (DECL_RTL (parms), 0));
2416 dbxout_type (TREE_TYPE (parms), 0, 0);
2417 dbxout_finish_symbol (parms);
2422 /* Output definitions for the places where parms live during the function,
2423 when different from where they were passed, when the parms were passed
2426 It is not useful to do this for parms passed in registers
2427 that live during the function in different registers, because it is
2428 impossible to look in the passed register for the passed value,
2429 so we use the within-the-function register to begin with.
2431 PARMS is a chain of PARM_DECL nodes. */
2434 dbxout_reg_parms (parms)
2437 for (; parms; parms = TREE_CHAIN (parms))
2438 if (DECL_NAME (parms) && PARM_PASSED_IN_MEMORY (parms))
2440 dbxout_prepare_symbol (parms);
2442 /* Report parms that live in registers during the function
2443 but were passed in memory. */
2444 if (GET_CODE (DECL_RTL (parms)) == REG
2445 && REGNO (DECL_RTL (parms)) >= 0
2446 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
2447 dbxout_symbol_location (parms, TREE_TYPE (parms),
2448 0, DECL_RTL (parms));
2449 else if (GET_CODE (DECL_RTL (parms)) == CONCAT)
2450 dbxout_symbol_location (parms, TREE_TYPE (parms),
2451 0, DECL_RTL (parms));
2452 /* Report parms that live in memory but not where they were passed. */
2453 else if (GET_CODE (DECL_RTL (parms)) == MEM
2454 && ! rtx_equal_p (DECL_RTL (parms), DECL_INCOMING_RTL (parms)))
2455 dbxout_symbol_location (parms, TREE_TYPE (parms),
2456 0, DECL_RTL (parms));
2460 /* Given a chain of ..._TYPE nodes (as come in a parameter list),
2461 output definitions of those names, in raw form */
2469 putc (',', asmfile);
2470 dbxout_type (TREE_VALUE (args), 0, 0);
2472 args = TREE_CHAIN (args);
2476 /* Given a chain of ..._TYPE nodes,
2477 find those which have typedef names and output those names.
2478 This is to ensure those types get output. */
2481 dbxout_types (types)
2482 register tree types;
2486 if (TYPE_NAME (types)
2487 && TREE_CODE (TYPE_NAME (types)) == TYPE_DECL
2488 && ! TREE_ASM_WRITTEN (TYPE_NAME (types)))
2489 dbxout_symbol (TYPE_NAME (types), 1);
2490 types = TREE_CHAIN (types);
2494 /* Output everything about a symbol block (a BLOCK node
2495 that represents a scope level),
2496 including recursive output of contained blocks.
2498 BLOCK is the BLOCK node.
2499 DEPTH is its depth within containing symbol blocks.
2500 ARGS is usually zero; but for the outermost block of the
2501 body of a function, it is a chain of PARM_DECLs for the function parameters.
2502 We output definitions of all the register parms
2503 as if they were local variables of that block.
2505 If -g1 was used, we count blocks just the same, but output nothing
2506 except for the outermost block.
2508 Actually, BLOCK may be several blocks chained together.
2509 We handle them all in sequence. */
2512 dbxout_block (block, depth, args)
2513 register tree block;
2521 /* Ignore blocks never expanded or otherwise marked as real. */
2522 if (TREE_USED (block))
2524 #ifndef DBX_LBRAC_FIRST
2525 /* In dbx format, the syms of a block come before the N_LBRAC. */
2526 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
2527 dbxout_syms (BLOCK_VARS (block));
2529 dbxout_reg_parms (args);
2532 /* Now output an N_LBRAC symbol to represent the beginning of
2533 the block. Use the block's tree-walk order to generate
2534 the assembler symbols LBBn and LBEn
2535 that final will define around the code in this block. */
2536 if (depth > 0 && debug_info_level != DINFO_LEVEL_TERSE)
2539 blocknum = next_block_number++;
2540 ASM_GENERATE_INTERNAL_LABEL (buf, "LBB", blocknum);
2542 if (BLOCK_HANDLER_BLOCK (block))
2544 /* A catch block. Must precede N_LBRAC. */
2545 tree decl = BLOCK_VARS (block);
2548 #ifdef DBX_OUTPUT_CATCH
2549 DBX_OUTPUT_CATCH (asmfile, decl, buf);
2551 fprintf (asmfile, "%s \"%s:C1\",%d,0,0,", ASM_STABS_OP,
2552 IDENTIFIER_POINTER (DECL_NAME (decl)), N_CATCH);
2553 assemble_name (asmfile, buf);
2554 fprintf (asmfile, "\n");
2556 decl = TREE_CHAIN (decl);
2560 #ifdef DBX_OUTPUT_LBRAC
2561 DBX_OUTPUT_LBRAC (asmfile, buf);
2563 fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_LBRAC);
2564 assemble_name (asmfile, buf);
2565 #if DBX_BLOCKS_FUNCTION_RELATIVE
2566 fputc ('-', asmfile);
2567 assemble_name (asmfile, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));
2569 fprintf (asmfile, "\n");
2573 /* Count blocks the same way regardless of debug_info_level. */
2574 next_block_number++;
2576 #ifdef DBX_LBRAC_FIRST
2577 /* On some weird machines, the syms of a block
2578 come after the N_LBRAC. */
2579 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
2580 dbxout_syms (BLOCK_VARS (block));
2582 dbxout_reg_parms (args);
2585 /* Output the subblocks. */
2586 dbxout_block (BLOCK_SUBBLOCKS (block), depth + 1, NULL_TREE);
2588 /* Refer to the marker for the end of the block. */
2589 if (depth > 0 && debug_info_level != DINFO_LEVEL_TERSE)
2592 ASM_GENERATE_INTERNAL_LABEL (buf, "LBE", blocknum);
2593 #ifdef DBX_OUTPUT_RBRAC
2594 DBX_OUTPUT_RBRAC (asmfile, buf);
2596 fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_RBRAC);
2597 assemble_name (asmfile, buf);
2598 #if DBX_BLOCKS_FUNCTION_RELATIVE
2599 fputc ('-', asmfile);
2600 assemble_name (asmfile, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));
2602 fprintf (asmfile, "\n");
2606 block = BLOCK_CHAIN (block);
2610 /* Output the information about a function and its arguments and result.
2611 Usually this follows the function's code,
2612 but on some systems, it comes before. */
2615 dbxout_really_begin_function (decl)
2618 dbxout_symbol (decl, 0);
2619 dbxout_parms (DECL_ARGUMENTS (decl));
2620 if (DECL_NAME (DECL_RESULT (decl)) != 0)
2621 dbxout_symbol (DECL_RESULT (decl), 1);
2624 /* Called at beginning of output of function definition. */
2627 dbxout_begin_function (decl)
2630 #ifdef DBX_FUNCTION_FIRST
2631 dbxout_really_begin_function (decl);
2635 /* Output dbx data for a function definition.
2636 This includes a definition of the function name itself (a symbol),
2637 definitions of the parameters (locating them in the parameter list)
2638 and then output the block that makes up the function's body
2639 (including all the auto variables of the function). */
2642 dbxout_function (decl)
2645 #ifndef DBX_FUNCTION_FIRST
2646 dbxout_really_begin_function (decl);
2648 dbxout_block (DECL_INITIAL (decl), 0, DECL_ARGUMENTS (decl));
2649 #ifdef DBX_OUTPUT_FUNCTION_END
2650 DBX_OUTPUT_FUNCTION_END (asmfile, decl);
2653 #endif /* DBX_DEBUGGING_INFO */