1 /* Output dbx-format symbol table information from GNU compiler.
2 Copyright (C) 1987, 1988, 1992, 1993 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, 675 Mass Ave, Cambridge, MA 02139, USA. */
21 /* Output dbx-format symbol table data.
22 This consists of many symbol table entries, each of them
23 a .stabs assembler pseudo-op with four operands:
24 a "name" which is really a description of one symbol and its type,
25 a "code", which is a symbol defined in stab.h whose name starts with N_,
26 an unused operand always 0,
27 and a "value" which is an address or an offset.
28 The name is enclosed in doublequote characters.
30 Each function, variable, typedef, and structure tag
31 has a symbol table entry to define it.
32 The beginning and end of each level of name scoping within
33 a function are also marked by special symbol table entries.
35 The "name" consists of the symbol name, a colon, a kind-of-symbol letter,
36 and a data type number. The data type number may be followed by
37 "=" and a type definition; normally this will happen the first time
38 the type number is mentioned. The type definition may refer to
39 other types by number, and those type numbers may be followed
40 by "=" and nested definitions.
42 This can make the "name" quite long.
43 When a name is more than 80 characters, we split the .stabs pseudo-op
44 into two .stabs pseudo-ops, both sharing the same "code" and "value".
45 The first one is marked as continued with a double-backslash at the
48 The kind-of-symbol letter distinguished function names from global
49 variables from file-scope variables from parameters from auto
50 variables in memory from typedef names from register variables.
53 The "code" is mostly redundant with the kind-of-symbol letter
54 that goes in the "name", but not entirely: for symbols located
55 in static storage, the "code" says which segment the address is in,
56 which controls how it is relocated.
58 The "value" for a symbol in static storage
59 is the core address of the symbol (actually, the assembler
60 label for the symbol). For a symbol located in a stack slot
61 it is the stack offset; for one in a register, the register number.
62 For a typedef symbol, it is zero.
64 If DEBUG_SYMS_TEXT is defined, all debugging symbols must be
65 output while in the text section.
67 For more on data type definitions, see `dbxout_type'. */
69 /* Include these first, because they may define MIN and MAX. */
78 #include "insn-config.h"
81 #include "output.h" /* ASM_OUTPUT_SOURCE_LINE may refer to sdb functions. */
87 #ifdef XCOFF_DEBUGGING_INFO
92 #define ASM_STABS_OP ".stabs"
96 #define ASM_STABN_OP ".stabn"
99 #ifndef DBX_TYPE_DECL_STABS_CODE
100 #define DBX_TYPE_DECL_STABS_CODE N_LSYM
103 #ifndef DBX_STATIC_CONST_VAR_CODE
104 #define DBX_STATIC_CONST_VAR_CODE N_FUN
107 #ifndef DBX_REGPARM_STABS_CODE
108 #define DBX_REGPARM_STABS_CODE N_RSYM
111 #ifndef DBX_REGPARM_STABS_LETTER
112 #define DBX_REGPARM_STABS_LETTER 'P'
115 #ifndef DBX_MEMPARM_STABS_LETTER
116 #define DBX_MEMPARM_STABS_LETTER 'p'
119 #ifndef FILE_NAME_JOINER
120 #define FILE_NAME_JOINER "/"
123 /* Nonzero means if the type has methods, only output debugging
124 information if methods are actually written to the asm file. */
126 static int flag_minimal_debug = 1;
128 /* Nonzero if we have actually used any of the GDB extensions
129 to the debugging format. The idea is that we use them for the
130 first time only if there's a strong reason, but once we have done that,
131 we use them whenever convenient. */
133 static int have_used_extensions = 0;
137 /* Typical USG systems don't have stab.h, and they also have
138 no use for DBX-format debugging info. */
140 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
142 #ifdef DEBUG_SYMS_TEXT
143 #define FORCE_TEXT text_section ();
148 #if defined (USG) || defined (NO_STAB_H)
149 #include "gstab.h" /* If doing DBX on sysV, use our own stab.h. */
151 #include <stab.h> /* On BSD, use the system's stab.h. */
153 /* This is a GNU extension we need to reference in this file. */
160 #define STAB_CODE_TYPE enum __stab_debug_code
162 #define STAB_CODE_TYPE int
165 /* 1 if PARM is passed to this function in memory. */
167 #define PARM_PASSED_IN_MEMORY(PARM) \
168 (GET_CODE (DECL_INCOMING_RTL (PARM)) == MEM)
170 /* A C expression for the integer offset value of an automatic variable
171 (N_LSYM) having address X (an RTX). */
172 #ifndef DEBUGGER_AUTO_OFFSET
173 #define DEBUGGER_AUTO_OFFSET(X) \
174 (GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0)
177 /* A C expression for the integer offset value of an argument (N_PSYM)
178 having address X (an RTX). The nominal offset is OFFSET. */
179 #ifndef DEBUGGER_ARG_OFFSET
180 #define DEBUGGER_ARG_OFFSET(OFFSET, X) (OFFSET)
183 /* Stream for writing to assembler file. */
185 static FILE *asmfile;
187 /* Last source file name mentioned in a NOTE insn. */
189 static char *lastfile;
191 /* Current working directory. */
195 enum typestatus {TYPE_UNSEEN, TYPE_XREF, TYPE_DEFINED};
197 /* Vector recording the status of describing C data types.
198 When we first notice a data type (a tree node),
199 we assign it a number using next_type_number.
200 That is its index in this vector.
201 The vector element says whether we have yet output
202 the definition of the type. TYPE_XREF says we have
203 output it as a cross-reference only. */
205 enum typestatus *typevec;
207 /* Number of elements of space allocated in `typevec'. */
209 static int typevec_len;
211 /* In dbx output, each type gets a unique number.
212 This is the number for the next type output.
213 The number, once assigned, is in the TYPE_SYMTAB_ADDRESS field. */
215 static int next_type_number;
217 /* In dbx output, we must assign symbol-blocks id numbers
218 in the order in which their beginnings are encountered.
219 We output debugging info that refers to the beginning and
220 end of the ranges of code in each block
221 with assembler labels LBBn and LBEn, where n is the block number.
222 The labels are generated in final, which assigns numbers to the
223 blocks in the same way. */
225 static int next_block_number;
227 /* These variables are for dbxout_symbol to communicate to
228 dbxout_finish_symbol.
229 current_sym_code is the symbol-type-code, a symbol N_... define in stab.h.
230 current_sym_value and current_sym_addr are two ways to address the
231 value to store in the symtab entry.
232 current_sym_addr if nonzero represents the value as an rtx.
233 If that is zero, current_sym_value is used. This is used
234 when the value is an offset (such as for auto variables,
235 register variables and parms). */
237 static STAB_CODE_TYPE current_sym_code;
238 static int current_sym_value;
239 static rtx current_sym_addr;
241 /* Number of chars of symbol-description generated so far for the
242 current symbol. Used by CHARS and CONTIN. */
244 static int current_sym_nchars;
246 /* Report having output N chars of the current symbol-description. */
248 #define CHARS(N) (current_sym_nchars += (N))
250 /* Break the current symbol-description, generating a continuation,
251 if it has become long. */
253 #ifndef DBX_CONTIN_LENGTH
254 #define DBX_CONTIN_LENGTH 80
257 #if DBX_CONTIN_LENGTH > 0
259 do {if (current_sym_nchars > DBX_CONTIN_LENGTH) dbxout_continue ();} while (0)
264 void dbxout_types ();
266 void dbxout_symbol ();
267 static void dbxout_type_name ();
268 static void dbxout_type ();
269 static void dbxout_typedefs ();
270 static void dbxout_symbol_name ();
271 static void dbxout_symbol_location ();
272 static void dbxout_prepare_symbol ();
273 static void dbxout_finish_symbol ();
274 static void dbxout_continue ();
275 static void print_int_cst_octal ();
276 static void print_octal ();
278 #if 0 /* Not clear we will actually need this. */
280 /* Return the absolutized filename for the given relative
281 filename. Note that if that filename is already absolute, it may
282 still be returned in a modified form because this routine also
283 eliminates redundant slashes and single dots and eliminates double
284 dots to get a shortest possible filename from the given input
285 filename. The absolutization of relative filenames is made by
286 assuming that the given filename is to be taken as relative to
287 the first argument (cwd) or to the current directory if cwd is
291 abspath (rel_filename)
294 /* Setup the current working directory as needed. */
296 = (char *) alloca (strlen (cwd) + strlen (rel_filename) + 1);
297 char *endp = abs_buffer;
301 /* Copy the filename (possibly preceded by the current working
302 directory name) into the absolutization buffer. */
307 if (rel_filename[0] != '/')
310 while (*endp++ = *src_p++)
312 *(endp-1) = '/'; /* overwrite null */
314 src_p = rel_filename;
315 while (*endp++ = *src_p++)
320 /* Now make a copy of abs_buffer into abs_buffer, shortening the
321 filename (by taking out slashes and dots) as we go. */
323 outp = inp = abs_buffer;
324 *outp++ = *inp++; /* copy first slash */
329 else if (inp[0] == '/' && outp[-1] == '/')
334 else if (inp[0] == '.' && outp[-1] == '/')
338 else if (inp[1] == '/')
343 else if ((inp[1] == '.') && (inp[2] == 0 || inp[2] == '/'))
345 inp += (inp[2] == '/') ? 3 : 2;
347 while (outp >= abs_buffer && *outp != '/')
349 if (outp < abs_buffer)
351 /* Catch cases like /.. where we try to backup to a
352 point above the absolute root of the logical file
355 fprintf (stderr, "%s: invalid file name: %s\n",
356 pname, rel_filename);
366 /* On exit, make sure that there is a trailing null, and make sure that
367 the last character of the returned string is *not* a slash. */
373 /* Make a copy (in the heap) of the stuff left in the absolutization
374 buffer and return a pointer to the copy. */
376 value = (char *) oballoc (strlen (abs_buffer) + 1);
377 strcpy (value, abs_buffer);
382 /* At the beginning of compilation, start writing the symbol table.
383 Initialize `typevec' and output the standard data types of C. */
386 dbxout_init (asm_file, input_file_name, syms)
388 char *input_file_name;
391 char ltext_label_name[100];
396 typevec = (enum typestatus *) xmalloc (typevec_len * sizeof typevec[0]);
397 bzero (typevec, typevec_len * sizeof typevec[0]);
399 /* Convert Ltext into the appropriate format for local labels in case
400 the system doesn't insert underscores in front of user generated
402 ASM_GENERATE_INTERNAL_LABEL (ltext_label_name, "Ltext", 0);
404 /* Put the current working directory in an N_SO symbol. */
405 #ifndef DBX_WORKING_DIRECTORY /* Only some versions of DBX want this,
406 but GDB always does. */
407 if (use_gnu_debug_info_extensions)
410 if (!cwd && (cwd = getpwd ()) && (!*cwd || cwd[strlen (cwd) - 1] != '/'))
412 char *wdslash = xmalloc (strlen (cwd) + sizeof (FILE_NAME_JOINER));
413 sprintf (wdslash, "%s%s", cwd, FILE_NAME_JOINER);
418 #ifdef DBX_OUTPUT_MAIN_SOURCE_DIRECTORY
419 DBX_OUTPUT_MAIN_SOURCE_DIRECTORY (asmfile, cwd);
420 #else /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */
421 fprintf (asmfile, "%s ", ASM_STABS_OP);
422 output_quoted_string (asmfile, cwd);
423 fprintf (asmfile, ",%d,0,0,%s\n", N_SO, <ext_label_name[1]);
424 #endif /* no DBX_OUTPUT_MAIN_SOURCE_DIRECTORY */
428 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILENAME
429 /* This should NOT be DBX_OUTPUT_SOURCE_FILENAME. That
430 would give us an N_SOL, and we want an N_SO. */
431 DBX_OUTPUT_MAIN_SOURCE_FILENAME (asmfile, input_file_name);
432 #else /* no DBX_OUTPUT_MAIN_SOURCE_FILENAME */
433 /* We include outputting `Ltext:' here,
434 because that gives you a way to override it. */
435 /* Used to put `Ltext:' before the reference, but that loses on sun 4. */
436 fprintf (asmfile, "%s ", ASM_STABS_OP);
437 output_quoted_string (asmfile, input_file_name);
438 fprintf (asmfile, ",%d,0,0,%s\n",
439 N_SO, <ext_label_name[1]);
441 ASM_OUTPUT_INTERNAL_LABEL (asmfile, "Ltext", 0);
442 #endif /* no DBX_OUTPUT_MAIN_SOURCE_FILENAME */
444 /* Possibly output something to inform GDB that this compilation was by
445 GCC. It's easier for GDB to parse it when after the N_SO's. This
446 is used in Solaris 2. */
447 #ifdef ASM_IDENTIFY_GCC_AFTER_SOURCE
448 ASM_IDENTIFY_GCC_AFTER_SOURCE (asmfile);
451 lastfile = input_file_name;
453 next_type_number = 1;
454 next_block_number = 2;
456 /* Make sure that types `int' and `char' have numbers 1 and 2.
457 Definitions of other integer types will refer to those numbers.
458 (Actually it should no longer matter what their numbers are.
459 Also, if any types with tags have been defined, dbxout_symbol
460 will output them first, so the numbers won't be 1 and 2. That
461 happens in C++. So it's a good thing it should no longer matter). */
463 #ifdef DBX_OUTPUT_STANDARD_TYPES
464 DBX_OUTPUT_STANDARD_TYPES (syms);
466 dbxout_symbol (TYPE_NAME (integer_type_node), 0);
467 dbxout_symbol (TYPE_NAME (char_type_node), 0);
470 /* Get all permanent types that have typedef names,
471 and output them all, except for those already output. */
473 dbxout_typedefs (syms);
476 /* Output any typedef names for types described by TYPE_DECLs in SYMS,
477 in the reverse order from that which is found in SYMS. */
480 dbxout_typedefs (syms)
485 dbxout_typedefs (TREE_CHAIN (syms));
486 if (TREE_CODE (syms) == TYPE_DECL)
488 tree type = TREE_TYPE (syms);
490 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
491 && ! TREE_ASM_WRITTEN (TYPE_NAME (type)))
492 dbxout_symbol (TYPE_NAME (type), 0);
497 /* Output debugging info to FILE to switch to sourcefile FILENAME. */
500 dbxout_source_file (file, filename)
504 char ltext_label_name[100];
506 if (filename && (lastfile == 0 || strcmp (filename, lastfile)))
508 #ifdef DBX_OUTPUT_SOURCE_FILENAME
509 DBX_OUTPUT_SOURCE_FILENAME (file, filename);
511 ASM_GENERATE_INTERNAL_LABEL (ltext_label_name, "Ltext", 0);
512 fprintf (file, "%s ", ASM_STABS_OP);
513 output_quoted_string (file, filename);
514 fprintf (file, ",%d,0,0,%s\n", N_SOL, <ext_label_name[1]);
520 /* Output a line number symbol entry into output stream FILE,
521 for source file FILENAME and line number LINENO. */
524 dbxout_source_line (file, filename, lineno)
529 dbxout_source_file (file, filename);
531 #ifdef ASM_OUTPUT_SOURCE_LINE
532 ASM_OUTPUT_SOURCE_LINE (file, lineno);
534 fprintf (file, "\t%s %d,0,%d\n", ASM_STABD_OP, N_SLINE, lineno);
538 /* At the end of compilation, finish writing the symbol table.
539 Unless you define DBX_OUTPUT_MAIN_SOURCE_FILE_END, the default is
543 dbxout_finish (file, filename)
547 #ifdef DBX_OUTPUT_MAIN_SOURCE_FILE_END
548 DBX_OUTPUT_MAIN_SOURCE_FILE_END (file, filename);
549 #endif /* DBX_OUTPUT_MAIN_SOURCE_FILE_END */
552 /* Continue a symbol-description that gets too big.
553 End one symbol table entry with a double-backslash
554 and start a new one, eventually producing something like
555 .stabs "start......\\",code,0,value
556 .stabs "...rest",code,0,value */
561 #ifdef DBX_CONTIN_CHAR
562 fprintf (asmfile, "%c", DBX_CONTIN_CHAR);
564 fprintf (asmfile, "\\\\");
566 dbxout_finish_symbol (NULL_TREE);
567 fprintf (asmfile, "%s \"", ASM_STABS_OP);
568 current_sym_nchars = 0;
571 /* Subroutine of `dbxout_type'. Output the type fields of TYPE.
572 This must be a separate function because anonymous unions require
576 dbxout_type_fields (type)
580 /* Output the name, type, position (in bits), size (in bits) of each
582 for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem))
584 /* Omit here local type decls until we know how to support them. */
585 if (TREE_CODE (tem) == TYPE_DECL)
587 /* Omit fields whose position or size are variable. */
588 else if (TREE_CODE (tem) == FIELD_DECL
589 && (TREE_CODE (DECL_FIELD_BITPOS (tem)) != INTEGER_CST
590 || TREE_CODE (DECL_SIZE (tem)) != INTEGER_CST))
592 /* Omit here the nameless fields that are used to skip bits. */
593 else if (TREE_CODE (tem) != CONST_DECL)
595 /* Continue the line if necessary,
596 but not before the first field. */
597 if (tem != TYPE_FIELDS (type))
600 if (use_gnu_debug_info_extensions
601 && flag_minimal_debug
602 && TREE_CODE (tem) == FIELD_DECL
603 && DECL_VIRTUAL_P (tem)
604 && DECL_ASSEMBLER_NAME (tem))
606 have_used_extensions = 1;
607 CHARS (3 + IDENTIFIER_LENGTH (DECL_NAME (TYPE_NAME (DECL_FCONTEXT (tem)))));
608 fputs (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (tem)), asmfile);
609 dbxout_type (DECL_FCONTEXT (tem), 0, 0);
610 fprintf (asmfile, ":");
611 dbxout_type (TREE_TYPE (tem), 0, 0);
612 fprintf (asmfile, ",%d;",
613 TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem)));
619 fprintf (asmfile, "%s:", IDENTIFIER_POINTER (DECL_NAME (tem)));
620 CHARS (2 + IDENTIFIER_LENGTH (DECL_NAME (tem)));
624 fprintf (asmfile, ":");
628 if (use_gnu_debug_info_extensions
629 && (TREE_PRIVATE (tem) || TREE_PROTECTED (tem)
630 || TREE_CODE (tem) != FIELD_DECL))
632 have_used_extensions = 1;
634 putc ((TREE_PRIVATE (tem) ? '0'
635 : TREE_PROTECTED (tem) ? '1' : '2'),
640 dbxout_type ((TREE_CODE (tem) == FIELD_DECL
641 && DECL_BIT_FIELD_TYPE (tem))
642 ? DECL_BIT_FIELD_TYPE (tem)
643 : TREE_TYPE (tem), 0, 0);
645 if (TREE_CODE (tem) == VAR_DECL)
647 if (TREE_STATIC (tem) && use_gnu_debug_info_extensions)
649 char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (tem));
650 have_used_extensions = 1;
651 fprintf (asmfile, ":%s;", name);
652 CHARS (strlen (name));
656 /* If TEM is non-static, GDB won't understand it. */
657 fprintf (asmfile, ",0,0;");
660 else if (TREE_CODE (DECL_FIELD_BITPOS (tem)) == INTEGER_CST)
662 fprintf (asmfile, ",%d,%d;",
663 TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem)),
664 TREE_INT_CST_LOW (DECL_SIZE (tem)));
671 /* Subroutine of `dbxout_type_methods'. Output debug info about the
672 method described DECL. DEBUG_NAME is an encoding of the method's
673 type signature. ??? We may be able to do without DEBUG_NAME altogether
677 dbxout_type_method_1 (decl, debug_name)
681 tree firstarg = TREE_VALUE (TYPE_ARG_TYPES (TREE_TYPE (decl)));
684 if (TREE_CODE (TREE_TYPE (decl)) == FUNCTION_TYPE)
686 else /* it's a METHOD_TYPE. */
688 /* A for normal functions.
689 B for `const' member functions.
690 C for `volatile' member functions.
691 D for `const volatile' member functions. */
692 if (TYPE_READONLY (TREE_TYPE (firstarg)))
694 if (TYPE_VOLATILE (TREE_TYPE (firstarg)))
697 if (DECL_VINDEX (decl))
703 fprintf (asmfile, ":%s;%c%c%c", debug_name,
704 TREE_PRIVATE (decl) ? '0' : TREE_PROTECTED (decl) ? '1' : '2', c1, c2);
705 CHARS (IDENTIFIER_LENGTH (DECL_ASSEMBLER_NAME (decl)) + 6
706 - (debug_name - IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl))));
707 if (DECL_VINDEX (decl))
709 fprintf (asmfile, "%d;",
710 TREE_INT_CST_LOW (DECL_VINDEX (decl)));
711 dbxout_type (DECL_CONTEXT (decl), 0, 0);
712 fprintf (asmfile, ";");
717 /* Subroutine of `dbxout_type'. Output debug info about the methods defined
721 dbxout_type_methods (type)
724 /* C++: put out the method names and their parameter lists */
725 tree methods = TYPE_METHODS (type);
727 register tree fndecl;
729 char formatted_type_identifier_length[16];
730 register int type_identifier_length;
732 if (methods == NULL_TREE)
735 type_encoding = DECL_NAME (TYPE_NAME (type));
737 /* C++: Template classes break some assumptions made by this code about
738 the class names, constructor names, and encodings for assembler
739 label names. For now, disable output of dbx info for them. */
741 char *ptr = IDENTIFIER_POINTER (type_encoding);
742 /* This should use index. (mrs) */
743 while (*ptr && *ptr != '<') ptr++;
750 #ifdef HAVE_TEMPLATES
751 if (warn_template_debugging)
752 warning ("dbx info for template class methods not yet supported");
759 type_identifier_length = IDENTIFIER_LENGTH (type_encoding);
761 sprintf(formatted_type_identifier_length, "%d", type_identifier_length);
763 if (TREE_CODE (methods) == FUNCTION_DECL)
765 else if (TREE_VEC_ELT (methods, 0) != NULL_TREE)
766 fndecl = TREE_VEC_ELT (methods, 0);
768 fndecl = TREE_VEC_ELT (methods, 1);
772 tree name = DECL_NAME (fndecl);
775 /* Group together all the methods for the same operation.
776 These differ in the types of the arguments. */
777 for (last = NULL_TREE;
778 fndecl && (last == NULL_TREE || DECL_NAME (fndecl) == DECL_NAME (last));
779 fndecl = TREE_CHAIN (fndecl))
780 /* Output the name of the field (after overloading), as
781 well as the name of the field before overloading, along
782 with its parameter list */
784 /* This is the "mangled" name of the method.
785 It encodes the argument types. */
786 char *debug_name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (fndecl));
793 if (DECL_IGNORED_P (fndecl))
796 if (flag_minimal_debug)
798 /* Detect ordinary methods because their mangled names
799 start with the operation name. */
800 if (!strncmp (IDENTIFIER_POINTER (name), debug_name,
801 IDENTIFIER_LENGTH (name)))
803 debug_name += IDENTIFIER_LENGTH (name);
804 if (debug_name[0] == '_' && debug_name[1] == '_')
806 char *method_name = debug_name + 2;
807 char *length_ptr = formatted_type_identifier_length;
808 /* Get past const and volatile qualifiers. */
809 while (*method_name == 'C' || *method_name == 'V')
811 /* Skip digits for length of type_encoding. */
812 while (*method_name == *length_ptr && *length_ptr)
813 length_ptr++, method_name++;
814 if (! strncmp (method_name,
815 IDENTIFIER_POINTER (type_encoding),
816 type_identifier_length))
817 method_name += type_identifier_length;
818 debug_name = method_name;
821 /* Detect constructors by their style of name mangling. */
822 else if (debug_name[0] == '_' && debug_name[1] == '_')
824 char *ctor_name = debug_name + 2;
825 char *length_ptr = formatted_type_identifier_length;
826 while (*ctor_name == 'C' || *ctor_name == 'V')
828 /* Skip digits for length of type_encoding. */
829 while (*ctor_name == *length_ptr && *length_ptr)
830 length_ptr++, ctor_name++;
831 if (!strncmp (IDENTIFIER_POINTER (type_encoding), ctor_name,
832 type_identifier_length))
833 debug_name = ctor_name + type_identifier_length;
835 /* The other alternative is a destructor. */
839 /* Output the operation name just once, for the first method
843 fprintf (asmfile, "%s::", IDENTIFIER_POINTER (name));
844 CHARS (IDENTIFIER_LENGTH (name) + 2);
849 dbxout_type (TREE_TYPE (fndecl), 0, destructor);
851 dbxout_type_method_1 (fndecl, debug_name);
861 /* Emit a "range" type specification, which has the form:
862 "r<index type>;<lower bound>;<upper bound>;".
863 TYPE is an INTEGER_TYPE. */
866 dbxout_range_type (type)
869 fprintf (asmfile, "r");
870 if (TREE_TYPE (type))
871 dbxout_type (TREE_TYPE (type), 0, 0);
874 /* This used to say `r1' and we used to take care
875 to make sure that `int' was type number 1. */
876 fprintf (asmfile, "%d", TYPE_SYMTAB_ADDRESS (integer_type_node));
878 if (TREE_CODE (TYPE_MIN_VALUE (type)) == INTEGER_CST)
879 fprintf (asmfile, ";%d",
880 TREE_INT_CST_LOW (TYPE_MIN_VALUE (type)));
882 fprintf (asmfile, ";0");
883 if (TREE_CODE (TYPE_MAX_VALUE (type)) == INTEGER_CST)
884 fprintf (asmfile, ";%d;",
885 TREE_INT_CST_LOW (TYPE_MAX_VALUE (type)));
887 fprintf (asmfile, ";-1;");
890 /* Output a reference to a type. If the type has not yet been
891 described in the dbx output, output its definition now.
892 For a type already defined, just refer to its definition
893 using the type number.
895 If FULL is nonzero, and the type has been described only with
896 a forward-reference, output the definition now.
897 If FULL is zero in this case, just refer to the forward-reference
898 using the number previously allocated.
900 If SHOW_ARG_TYPES is nonzero, we output a description of the argument
901 types for a METHOD_TYPE. */
904 dbxout_type (type, full, show_arg_types)
910 static int anonymous_type_number = 0;
912 /* If there was an input error and we don't really have a type,
913 avoid crashing and write something that is at least valid
914 by assuming `int'. */
915 if (type == error_mark_node)
916 type = integer_type_node;
919 type = TYPE_MAIN_VARIANT (type);
921 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
922 && DECL_IGNORED_P (TYPE_NAME (type)))
926 if (TYPE_SYMTAB_ADDRESS (type) == 0)
928 /* Type has no dbx number assigned. Assign next available number. */
929 TYPE_SYMTAB_ADDRESS (type) = next_type_number++;
931 /* Make sure type vector is long enough to record about this type. */
933 if (next_type_number == typevec_len)
935 typevec = (enum typestatus *) xrealloc (typevec, typevec_len * 2 * sizeof typevec[0]);
936 bzero (typevec + typevec_len, typevec_len * sizeof typevec[0]);
941 /* Output the number of this type, to refer to it. */
942 fprintf (asmfile, "%d", TYPE_SYMTAB_ADDRESS (type));
945 #ifdef DBX_TYPE_DEFINED
946 if (DBX_TYPE_DEFINED (type))
950 /* If this type's definition has been output or is now being output,
953 switch (typevec[TYPE_SYMTAB_ADDRESS (type)])
958 /* If we have already had a cross reference,
959 and either that's all we want or that's the best we could do,
960 don't repeat the cross reference.
961 Sun dbx crashes if we do. */
962 if (! full || TYPE_SIZE (type) == 0
963 /* No way in DBX fmt to describe a variable size. */
964 || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
972 /* For systems where dbx output does not allow the `=xsNAME:' syntax,
973 leave the type-number completely undefined rather than output
974 a cross-reference. */
975 if (TREE_CODE (type) == RECORD_TYPE || TREE_CODE (type) == UNION_TYPE
976 || TREE_CODE (type) == QUAL_UNION_TYPE
977 || TREE_CODE (type) == ENUMERAL_TYPE)
979 if ((TYPE_NAME (type) != 0 && !full)
980 || TYPE_SIZE (type) == 0)
982 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_XREF;
987 /* Output a definition now. */
989 fprintf (asmfile, "=");
992 /* Mark it as defined, so that if it is self-referent
993 we will not get into an infinite recursion of definitions. */
995 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_DEFINED;
997 switch (TREE_CODE (type))
1001 /* For a void type, just define it as itself; ie, "5=5".
1002 This makes us consider it defined
1003 without saying what it is. The debugger will make it
1004 a void type when the reference is seen, and nothing will
1005 ever override that default. */
1006 fprintf (asmfile, "%d", TYPE_SYMTAB_ADDRESS (type));
1011 if (type == char_type_node && ! TREE_UNSIGNED (type))
1012 /* Output the type `char' as a subrange of itself!
1013 I don't understand this definition, just copied it
1014 from the output of pcc.
1015 This used to use `r2' explicitly and we used to
1016 take care to make sure that `char' was type number 2. */
1017 fprintf (asmfile, "r%d;0;127;", TYPE_SYMTAB_ADDRESS (type));
1018 else if (use_gnu_debug_info_extensions
1019 && (TYPE_PRECISION (type) > TYPE_PRECISION (integer_type_node)
1020 || TYPE_PRECISION (type) > HOST_BITS_PER_WIDE_INT))
1022 /* This used to say `r1' and we used to take care
1023 to make sure that `int' was type number 1. */
1024 fprintf (asmfile, "r%d;", TYPE_SYMTAB_ADDRESS (integer_type_node));
1025 print_int_cst_octal (TYPE_MIN_VALUE (type));
1026 fprintf (asmfile, ";");
1027 print_int_cst_octal (TYPE_MAX_VALUE (type));
1028 fprintf (asmfile, ";");
1030 else /* Output other integer types as subranges of `int'. */
1031 dbxout_range_type (type);
1036 /* This used to say `r1' and we used to take care
1037 to make sure that `int' was type number 1. */
1038 fprintf (asmfile, "r%d;%d;0;", TYPE_SYMTAB_ADDRESS (integer_type_node),
1039 int_size_in_bytes (type));
1044 if (use_gnu_debug_info_extensions)
1045 fprintf (asmfile, "@s%d;-20;",
1046 BITS_PER_UNIT * int_size_in_bytes (type));
1048 /* Output the type `char' as a subrange of itself.
1049 That is what pcc seems to do. */
1050 fprintf (asmfile, "r%d;0;%d;", TYPE_SYMTAB_ADDRESS (char_type_node),
1051 TREE_UNSIGNED (type) ? 255 : 127);
1056 if (use_gnu_debug_info_extensions)
1057 fprintf (asmfile, "@s%d;-16;",
1058 BITS_PER_UNIT * int_size_in_bytes (type));
1059 else /* Define as enumeral type (False, True) */
1060 fprintf (asmfile, "eFalse:0,True:1,;");
1065 putc ('d', asmfile);
1067 dbxout_type (TREE_TYPE (type), 0, 0);
1071 /* Differs from the REAL_TYPE by its new data type number */
1073 if (TREE_CODE (TREE_TYPE (type)) == REAL_TYPE)
1075 fprintf (asmfile, "r%d;%d;0;",
1076 TYPE_SYMTAB_ADDRESS (type),
1077 int_size_in_bytes (TREE_TYPE (type)));
1078 CHARS (15); /* The number is probably incorrect here. */
1082 /* Output a complex integer type as a structure,
1083 pending some other way to do it. */
1084 fprintf (asmfile, "s%d", int_size_in_bytes (type));
1086 fprintf (asmfile, "real:");
1088 dbxout_type (TREE_TYPE (type), 0, 0);
1089 fprintf (asmfile, ",%d,%d;",
1090 0, TYPE_PRECISION (TREE_TYPE (type)));
1092 fprintf (asmfile, "imag:");
1094 dbxout_type (TREE_TYPE (type), 0, 0);
1095 fprintf (asmfile, ",%d,%d;;",
1096 TYPE_PRECISION (TREE_TYPE (type)),
1097 TYPE_PRECISION (TREE_TYPE (type)));
1103 putc ('S', asmfile);
1105 dbxout_type (TYPE_DOMAIN (type), 0, 0);
1109 /* Output "a" followed by a range type definition
1110 for the index type of the array
1111 followed by a reference to the target-type.
1112 ar1;0;N;M for a C array of type M and size N+1. */
1113 tem = TYPE_DOMAIN (type);
1115 fprintf (asmfile, "ar%d;0;-1;",
1116 TYPE_SYMTAB_ADDRESS (integer_type_node));
1119 fprintf (asmfile, "a");
1120 dbxout_range_type (tem);
1123 dbxout_type (TREE_TYPE (type), 0, 0);
1128 case QUAL_UNION_TYPE:
1130 int i, n_baseclasses = 0;
1132 if (TYPE_BINFO (type) != 0 && TYPE_BINFO_BASETYPES (type) != 0)
1133 n_baseclasses = TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type));
1135 /* Output a structure type. */
1136 if ((TYPE_NAME (type) != 0
1137 /* Long ago, Tiemann said this creates output that "confuses GDB".
1138 In April 93, mrs@cygnus.com said there is no such problem.
1139 The type decls made automatically by struct specifiers
1140 are marked with DECL_IGNORED_P in C++. */
1141 #if 0 /* This creates output for anonymous classes which confuses GDB. */
1142 && ! (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1143 && DECL_IGNORED_P (TYPE_NAME (type)))
1146 || TYPE_SIZE (type) == 0
1147 /* No way in DBX fmt to describe a variable size. */
1148 || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
1150 /* If the type is just a cross reference, output one
1151 and mark the type as partially described.
1152 If it later becomes defined, we will output
1153 its real definition.
1154 If the type has a name, don't nest its definition within
1155 another type's definition; instead, output an xref
1156 and let the definition come when the name is defined. */
1157 fprintf (asmfile, (TREE_CODE (type) == RECORD_TYPE) ? "xs" : "xu");
1159 #if 0 /* This assertion is legitimately false in C++. */
1160 /* We shouldn't be outputting a reference to a type before its
1161 definition unless the type has a tag name.
1162 A typedef name without a tag name should be impossible. */
1163 if (TREE_CODE (TYPE_NAME (type)) != IDENTIFIER_NODE)
1166 if (TYPE_NAME (type) != 0)
1167 dbxout_type_name (type);
1169 fprintf (asmfile, "$$%d", anonymous_type_number++);
1170 fprintf (asmfile, ":");
1171 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_XREF;
1175 /* Identify record or union, and print its size. */
1176 fprintf (asmfile, (TREE_CODE (type) == RECORD_TYPE) ? "s%d" : "u%d",
1177 int_size_in_bytes (type));
1179 if (use_gnu_debug_info_extensions)
1183 have_used_extensions = 1;
1184 fprintf (asmfile, "!%d,", n_baseclasses);
1188 for (i = 0; i < n_baseclasses; i++)
1190 tree child = TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (type)), i);
1191 if (use_gnu_debug_info_extensions)
1193 have_used_extensions = 1;
1194 putc (TREE_VIA_VIRTUAL (child) ? '1'
1197 putc (TREE_VIA_PUBLIC (child) ? '2'
1200 fprintf (asmfile, "%d,",
1201 TREE_INT_CST_LOW (BINFO_OFFSET (child)) * BITS_PER_UNIT);
1203 dbxout_type (BINFO_TYPE (child), 0, 0);
1204 putc (';', asmfile);
1208 /* Print out the base class information with fields
1209 which have the same names at the types they hold. */
1210 dbxout_type_name (BINFO_TYPE (child));
1211 putc (':', asmfile);
1212 dbxout_type (BINFO_TYPE (child), full, 0);
1213 fprintf (asmfile, ",%d,%d;",
1214 TREE_INT_CST_LOW (BINFO_OFFSET (child)) * BITS_PER_UNIT,
1215 TREE_INT_CST_LOW (DECL_SIZE (TYPE_NAME (BINFO_TYPE (child)))) * BITS_PER_UNIT);
1223 /* Write out the field declarations. */
1224 dbxout_type_fields (type);
1225 if (use_gnu_debug_info_extensions && TYPE_METHODS (type) != NULL_TREE)
1227 have_used_extensions = 1;
1228 dbxout_type_methods (type);
1230 putc (';', asmfile);
1232 if (use_gnu_debug_info_extensions && TREE_CODE (type) == RECORD_TYPE
1233 /* Avoid the ~ if we don't really need it--it confuses dbx. */
1234 && TYPE_VFIELD (type))
1236 have_used_extensions = 1;
1238 /* Tell GDB+ that it may keep reading. */
1239 putc ('~', asmfile);
1241 /* We need to write out info about what field this class
1242 uses as its "main" vtable pointer field, because if this
1243 field is inherited from a base class, GDB cannot necessarily
1244 figure out which field it's using in time. */
1245 if (TYPE_VFIELD (type))
1247 putc ('%', asmfile);
1248 dbxout_type (DECL_FCONTEXT (TYPE_VFIELD (type)), 0, 0);
1250 putc (';', asmfile);
1256 if ((TYPE_NAME (type) != 0 && !full
1257 && (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
1258 && ! DECL_IGNORED_P (TYPE_NAME (type))))
1259 || TYPE_SIZE (type) == 0)
1261 fprintf (asmfile, "xe");
1263 dbxout_type_name (type);
1264 typevec[TYPE_SYMTAB_ADDRESS (type)] = TYPE_XREF;
1265 fprintf (asmfile, ":");
1268 #ifdef DBX_OUTPUT_ENUM
1269 DBX_OUTPUT_ENUM (asmfile, type);
1271 putc ('e', asmfile);
1273 for (tem = TYPE_VALUES (type); tem; tem = TREE_CHAIN (tem))
1275 fprintf (asmfile, "%s:", IDENTIFIER_POINTER (TREE_PURPOSE (tem)));
1276 if (TREE_INT_CST_HIGH (TREE_VALUE (tem)) == 0)
1277 fprintf (asmfile, "%lu",
1278 (unsigned long) TREE_INT_CST_LOW (TREE_VALUE (tem)));
1279 else if (TREE_INT_CST_HIGH (TREE_VALUE (tem)) == -1
1280 && TREE_INT_CST_LOW (TREE_VALUE (tem)) < 0)
1281 fprintf (asmfile, "%ld",
1282 (long) TREE_INT_CST_LOW (TREE_VALUE (tem)));
1284 print_int_cst_octal (TREE_VALUE (tem));
1285 fprintf (asmfile, ",");
1286 CHARS (20 + IDENTIFIER_LENGTH (TREE_PURPOSE (tem)));
1287 if (TREE_CHAIN (tem) != 0)
1290 putc (';', asmfile);
1296 putc ('*', asmfile);
1298 dbxout_type (TREE_TYPE (type), 0, 0);
1302 if (use_gnu_debug_info_extensions)
1304 have_used_extensions = 1;
1305 putc ('#', asmfile);
1307 if (flag_minimal_debug && !show_arg_types)
1309 /* Normally, just output the return type.
1310 The argument types are encoded in the method name. */
1311 putc ('#', asmfile);
1312 dbxout_type (TREE_TYPE (type), 0, 0);
1313 putc (';', asmfile);
1318 /* When outputting destructors, we need to write
1319 the argument types out longhand. */
1320 dbxout_type (TYPE_METHOD_BASETYPE (type), 0, 0);
1321 putc (',', asmfile);
1323 dbxout_type (TREE_TYPE (type), 0, 0);
1324 dbxout_args (TYPE_ARG_TYPES (type));
1325 putc (';', asmfile);
1331 /* Treat it as a function type. */
1332 dbxout_type (TREE_TYPE (type), 0, 0);
1337 if (use_gnu_debug_info_extensions)
1339 have_used_extensions = 1;
1340 putc ('@', asmfile);
1342 dbxout_type (TYPE_OFFSET_BASETYPE (type), 0, 0);
1343 putc (',', asmfile);
1345 dbxout_type (TREE_TYPE (type), 0, 0);
1349 /* Should print as an int, because it is really
1351 dbxout_type (integer_type_node, 0, 0);
1355 case REFERENCE_TYPE:
1356 if (use_gnu_debug_info_extensions)
1357 have_used_extensions = 1;
1358 putc (use_gnu_debug_info_extensions ? '&' : '*', asmfile);
1360 dbxout_type (TREE_TYPE (type), 0, 0);
1364 putc ('f', asmfile);
1366 dbxout_type (TREE_TYPE (type), 0, 0);
1374 /* Print the value of integer constant C, in octal,
1375 handling double precision. */
1378 print_int_cst_octal (c)
1381 unsigned HOST_WIDE_INT high = TREE_INT_CST_HIGH (c);
1382 unsigned HOST_WIDE_INT low = TREE_INT_CST_LOW (c);
1383 int excess = (3 - (HOST_BITS_PER_WIDE_INT % 3));
1384 int width = TYPE_PRECISION (TREE_TYPE (c));
1386 /* GDB wants constants with no extra leading "1" bits, so
1387 we need to remove any sign-extension that might be
1389 if (width == HOST_BITS_PER_WIDE_INT * 2)
1391 else if (width > HOST_BITS_PER_WIDE_INT)
1392 high &= (((HOST_WIDE_INT) 1 << (width - HOST_BITS_PER_WIDE_INT)) - 1);
1393 else if (width == HOST_BITS_PER_WIDE_INT)
1396 high = 0, low &= (((HOST_WIDE_INT) 1 << width) - 1);
1398 fprintf (asmfile, "0");
1402 print_octal (high, HOST_BITS_PER_WIDE_INT / 3);
1403 print_octal (low, HOST_BITS_PER_WIDE_INT / 3);
1407 unsigned HOST_WIDE_INT beg = high >> excess;
1408 unsigned HOST_WIDE_INT middle
1409 = ((high & (((HOST_WIDE_INT) 1 << excess) - 1)) << (3 - excess)
1410 | (low >> (HOST_BITS_PER_WIDE_INT / 3 * 3)));
1411 unsigned HOST_WIDE_INT end
1412 = low & (((unsigned HOST_WIDE_INT) 1
1413 << (HOST_BITS_PER_WIDE_INT / 3 * 3))
1416 fprintf (asmfile, "%o%01o", beg, middle);
1417 print_octal (end, HOST_BITS_PER_WIDE_INT / 3);
1422 print_octal (value, digits)
1423 unsigned HOST_WIDE_INT value;
1428 for (i = digits - 1; i >= 0; i--)
1429 fprintf (asmfile, "%01o", ((value >> (3 * i)) & 7));
1432 /* Output the name of type TYPE, with no punctuation.
1433 Such names can be set up either by typedef declarations
1434 or by struct, enum and union tags. */
1437 dbxout_type_name (type)
1441 if (TYPE_NAME (type) == 0)
1443 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
1445 t = TYPE_NAME (type);
1447 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
1449 t = DECL_NAME (TYPE_NAME (type));
1454 fprintf (asmfile, "%s", IDENTIFIER_POINTER (t));
1455 CHARS (IDENTIFIER_LENGTH (t));
1458 /* Output a .stabs for the symbol defined by DECL,
1459 which must be a ..._DECL node in the normal namespace.
1460 It may be a CONST_DECL, a FUNCTION_DECL, a PARM_DECL or a VAR_DECL.
1461 LOCAL is nonzero if the scope is less than the entire file. */
1464 dbxout_symbol (decl, local)
1469 tree type = TREE_TYPE (decl);
1470 tree context = NULL_TREE;
1473 /* Cast avoids warning in old compilers. */
1474 current_sym_code = (STAB_CODE_TYPE) 0;
1475 current_sym_value = 0;
1476 current_sym_addr = 0;
1478 /* Ignore nameless syms, but don't ignore type tags. */
1480 if ((DECL_NAME (decl) == 0 && TREE_CODE (decl) != TYPE_DECL)
1481 || DECL_IGNORED_P (decl))
1484 dbxout_prepare_symbol (decl);
1486 /* The output will always start with the symbol name,
1487 so always count that in the length-output-so-far. */
1489 if (DECL_NAME (decl) != 0)
1490 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (decl));
1492 switch (TREE_CODE (decl))
1495 /* Enum values are defined by defining the enum type. */
1499 if (DECL_RTL (decl) == 0)
1501 if (DECL_EXTERNAL (decl))
1503 /* Don't mention a nested function under its parent. */
1504 context = decl_function_context (decl);
1505 if (context == current_function_decl)
1507 if (GET_CODE (DECL_RTL (decl)) != MEM
1508 || GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF)
1512 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
1513 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
1514 TREE_PUBLIC (decl) ? 'F' : 'f');
1516 current_sym_code = N_FUN;
1517 current_sym_addr = XEXP (DECL_RTL (decl), 0);
1519 if (TREE_TYPE (type))
1520 dbxout_type (TREE_TYPE (type), 0, 0);
1522 dbxout_type (void_type_node, 0, 0);
1524 /* For a nested function, when that function is compiled,
1525 mention the containing function name
1526 as well as (since dbx wants it) our own assembler-name. */
1528 fprintf (asmfile, ",%s,%s",
1529 IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)),
1530 IDENTIFIER_POINTER (DECL_NAME (context)));
1532 dbxout_finish_symbol (decl);
1537 /* This seems all wrong. Outputting most kinds of types gives no name
1538 at all. A true definition gives no name; a cross-ref for a
1539 structure can give the tag name, but not a type name.
1540 It seems that no typedef name is defined by outputting a type. */
1542 /* If this typedef name was defined by outputting the type,
1543 don't duplicate it. */
1544 if (typevec[TYPE_SYMTAB_ADDRESS (type)] == TYPE_DEFINED
1545 && TYPE_NAME (TREE_TYPE (decl)) == decl)
1548 /* Don't output the same typedef twice.
1549 And don't output what language-specific stuff doesn't want output. */
1550 if (TREE_ASM_WRITTEN (decl) || DECL_IGNORED_P (decl))
1559 if (DECL_NAME (decl))
1561 /* Nonzero means we must output a tag as well as a typedef. */
1564 /* Handle the case of a C++ structure or union
1565 where the TYPE_NAME is a TYPE_DECL
1566 which gives both a typedef name and a tag. */
1567 /* dbx requires the tag first and the typedef second. */
1568 if ((TREE_CODE (type) == RECORD_TYPE
1569 || TREE_CODE (type) == UNION_TYPE
1570 || TREE_CODE (type) == QUAL_UNION_TYPE)
1571 && TYPE_NAME (type) == decl
1572 && !(use_gnu_debug_info_extensions && have_used_extensions)
1573 && !TREE_ASM_WRITTEN (TYPE_NAME (type))
1574 /* Distinguish the implicit typedefs of C++
1575 from explicit ones that might be found in C. */
1576 && (!strcmp (lang_identify (), "cplusplus")
1577 /* The following line maybe unnecessary;
1578 in 2.6, try removing it. */
1579 || DECL_SOURCE_LINE (decl) == 0))
1581 tree name = TYPE_NAME (type);
1582 if (TREE_CODE (name) == TYPE_DECL)
1583 name = DECL_NAME (name);
1585 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1586 current_sym_value = 0;
1587 current_sym_addr = 0;
1588 current_sym_nchars = 2 + IDENTIFIER_LENGTH (name);
1590 fprintf (asmfile, "%s \"%s:T", ASM_STABS_OP,
1591 IDENTIFIER_POINTER (name));
1592 dbxout_type (type, 1, 0);
1593 dbxout_finish_symbol (NULL_TREE);
1596 /* Output typedef name. */
1597 fprintf (asmfile, "%s \"%s:", ASM_STABS_OP,
1598 IDENTIFIER_POINTER (DECL_NAME (decl)));
1600 /* Short cut way to output a tag also. */
1601 if ((TREE_CODE (type) == RECORD_TYPE
1602 || TREE_CODE (type) == UNION_TYPE
1603 || TREE_CODE (type) == QUAL_UNION_TYPE)
1604 && TYPE_NAME (type) == decl)
1606 if (use_gnu_debug_info_extensions && have_used_extensions)
1608 putc ('T', asmfile);
1609 TREE_ASM_WRITTEN (TYPE_NAME (type)) = 1;
1611 #if 0 /* Now we generate the tag for this case up above. */
1617 putc ('t', asmfile);
1618 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1620 dbxout_type (type, 1, 0);
1621 dbxout_finish_symbol (decl);
1625 /* Don't output a tag if this is an incomplete type (TYPE_SIZE is
1626 zero). This prevents the sun4 Sun OS 4.x dbx from crashing. */
1628 if (tag_needed && TYPE_NAME (type) != 0 && TYPE_SIZE (type) != 0
1629 && !TREE_ASM_WRITTEN (TYPE_NAME (type)))
1631 /* For a TYPE_DECL with no name, but the type has a name,
1633 This is what represents `struct foo' with no typedef. */
1634 /* In C++, the name of a type is the corresponding typedef.
1635 In C, it is an IDENTIFIER_NODE. */
1636 tree name = TYPE_NAME (type);
1637 if (TREE_CODE (name) == TYPE_DECL)
1638 name = DECL_NAME (name);
1640 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1641 current_sym_value = 0;
1642 current_sym_addr = 0;
1643 current_sym_nchars = 2 + IDENTIFIER_LENGTH (name);
1645 fprintf (asmfile, "%s \"%s:T", ASM_STABS_OP,
1646 IDENTIFIER_POINTER (name));
1647 dbxout_type (type, 1, 0);
1648 dbxout_finish_symbol (NULL_TREE);
1652 /* If an enum type has no name, it cannot be referred to,
1653 but we must output it anyway, since the enumeration constants
1654 can be referred to. */
1655 if (!did_output && TREE_CODE (type) == ENUMERAL_TYPE)
1657 current_sym_code = DBX_TYPE_DECL_STABS_CODE;
1658 current_sym_value = 0;
1659 current_sym_addr = 0;
1660 current_sym_nchars = 2;
1662 /* Some debuggers fail when given NULL names, so give this a
1663 harmless name of ` '. */
1664 fprintf (asmfile, "%s \" :T", ASM_STABS_OP);
1665 dbxout_type (type, 1, 0);
1666 dbxout_finish_symbol (NULL_TREE);
1669 /* Prevent duplicate output of a typedef. */
1670 TREE_ASM_WRITTEN (decl) = 1;
1675 /* Parm decls go in their own separate chains
1676 and are output by dbxout_reg_parms and dbxout_parms. */
1680 /* Named return value, treat like a VAR_DECL. */
1682 if (DECL_RTL (decl) == 0)
1684 /* Don't mention a variable that is external.
1685 Let the file that defines it describe it. */
1686 if (DECL_EXTERNAL (decl))
1689 /* If the variable is really a constant
1690 and not written in memory, inform the debugger. */
1691 if (TREE_STATIC (decl) && TREE_READONLY (decl)
1692 && DECL_INITIAL (decl) != 0
1693 && ! TREE_ASM_WRITTEN (decl)
1694 && (DECL_FIELD_CONTEXT (decl) == NULL_TREE
1695 || TREE_CODE (DECL_FIELD_CONTEXT (decl)) == BLOCK))
1697 if (TREE_PUBLIC (decl) == 0)
1699 /* The sun4 assembler does not grok this. */
1700 char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
1701 if (TREE_CODE (TREE_TYPE (decl)) == INTEGER_TYPE
1702 || TREE_CODE (TREE_TYPE (decl)) == ENUMERAL_TYPE)
1704 HOST_WIDE_INT ival = TREE_INT_CST_LOW (DECL_INITIAL (decl));
1705 #ifdef DBX_OUTPUT_CONSTANT_SYMBOL
1706 DBX_OUTPUT_CONSTANT_SYMBOL (asmfile, name, ival);
1708 fprintf (asmfile, "%s \"%s:c=i%d\",0x%x,0,0,0\n",
1709 ASM_STABS_OP, name, ival, N_LSYM);
1713 else if (TREE_CODE (TREE_TYPE (decl)) == REAL_TYPE)
1715 /* don't know how to do this yet. */
1719 /* else it is something we handle like a normal variable. */
1722 DECL_RTL (decl) = eliminate_regs (DECL_RTL (decl), 0, NULL_RTX);
1723 #ifdef LEAF_REG_REMAP
1725 leaf_renumber_regs_insn (DECL_RTL (decl));
1728 dbxout_symbol_location (decl, type, 0, DECL_RTL (decl));
1732 /* Output the stab for DECL, a VAR_DECL, RESULT_DECL or PARM_DECL.
1733 Add SUFFIX to its name, if SUFFIX is not 0.
1734 Describe the variable as residing in HOME
1735 (usually HOME is DECL_RTL (DECL), but not always). */
1738 dbxout_symbol_location (decl, type, suffix, home)
1746 /* Don't mention a variable at all
1747 if it was completely optimized into nothingness.
1749 If the decl was from an inline function, then it's rtl
1750 is not identically the rtl that was used in this
1751 particular compilation. */
1752 if (GET_CODE (home) == REG)
1754 regno = REGNO (home);
1755 if (regno >= FIRST_PSEUDO_REGISTER)
1758 else if (GET_CODE (home) == SUBREG)
1762 while (GET_CODE (value) == SUBREG)
1764 offset += SUBREG_WORD (value);
1765 value = SUBREG_REG (value);
1767 if (GET_CODE (value) == REG)
1769 regno = REGNO (value);
1770 if (regno >= FIRST_PSEUDO_REGISTER)
1774 alter_subreg (home);
1777 /* The kind-of-variable letter depends on where
1778 the variable is and on the scope of its name:
1779 G and N_GSYM for static storage and global scope,
1780 S for static storage and file scope,
1781 V for static storage and local scope,
1782 for those two, use N_LCSYM if data is in bss segment,
1783 N_STSYM if in data segment, N_FUN otherwise.
1784 (We used N_FUN originally, then changed to N_STSYM
1785 to please GDB. However, it seems that confused ld.
1786 Now GDB has been fixed to like N_FUN, says Kingdon.)
1787 no letter at all, and N_LSYM, for auto variable,
1788 r and N_RSYM for register variable. */
1790 if (GET_CODE (home) == MEM
1791 && GET_CODE (XEXP (home, 0)) == SYMBOL_REF)
1793 if (TREE_PUBLIC (decl))
1796 current_sym_code = N_GSYM;
1800 current_sym_addr = XEXP (home, 0);
1802 letter = decl_function_context (decl) ? 'V' : 'S';
1804 if (!DECL_INITIAL (decl))
1805 current_sym_code = N_LCSYM;
1806 else if (DECL_IN_TEXT_SECTION (decl))
1807 /* This is not quite right, but it's the closest
1808 of all the codes that Unix defines. */
1809 current_sym_code = DBX_STATIC_CONST_VAR_CODE;
1812 /* Ultrix `as' seems to need this. */
1813 #ifdef DBX_STATIC_STAB_DATA_SECTION
1816 current_sym_code = N_STSYM;
1820 else if (regno >= 0)
1823 current_sym_code = N_RSYM;
1824 current_sym_value = DBX_REGISTER_NUMBER (regno);
1826 else if (GET_CODE (home) == MEM
1827 && (GET_CODE (XEXP (home, 0)) == MEM
1828 || (GET_CODE (XEXP (home, 0)) == REG
1829 && REGNO (XEXP (home, 0)) != HARD_FRAME_POINTER_REGNUM)))
1830 /* If the value is indirect by memory or by a register
1831 that isn't the frame pointer
1832 then it means the object is variable-sized and address through
1833 that register or stack slot. DBX has no way to represent this
1834 so all we can do is output the variable as a pointer.
1835 If it's not a parameter, ignore it.
1836 (VAR_DECLs like this can be made by integrate.c.) */
1838 if (GET_CODE (XEXP (home, 0)) == REG)
1841 current_sym_code = N_RSYM;
1842 current_sym_value = DBX_REGISTER_NUMBER (REGNO (XEXP (home, 0)));
1846 current_sym_code = N_LSYM;
1847 /* RTL looks like (MEM (MEM (PLUS (REG...) (CONST_INT...)))).
1848 We want the value of that CONST_INT. */
1850 = DEBUGGER_AUTO_OFFSET (XEXP (XEXP (home, 0), 0));
1853 /* Effectively do build_pointer_type, but don't cache this type,
1854 since it might be temporary whereas the type it points to
1855 might have been saved for inlining. */
1856 /* Don't use REFERENCE_TYPE because dbx can't handle that. */
1857 type = make_node (POINTER_TYPE);
1858 TREE_TYPE (type) = TREE_TYPE (decl);
1860 else if (GET_CODE (home) == MEM
1861 && GET_CODE (XEXP (home, 0)) == REG)
1863 current_sym_code = N_LSYM;
1864 current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0));
1866 else if (GET_CODE (home) == MEM
1867 && GET_CODE (XEXP (home, 0)) == PLUS
1868 && GET_CODE (XEXP (XEXP (home, 0), 1)) == CONST_INT)
1870 current_sym_code = N_LSYM;
1871 /* RTL looks like (MEM (PLUS (REG...) (CONST_INT...)))
1872 We want the value of that CONST_INT. */
1873 current_sym_value = DEBUGGER_AUTO_OFFSET (XEXP (home, 0));
1875 else if (GET_CODE (home) == MEM
1876 && GET_CODE (XEXP (home, 0)) == CONST)
1878 /* Handle an obscure case which can arise when optimizing and
1879 when there are few available registers. (This is *always*
1880 the case for i386/i486 targets). The RTL looks like
1881 (MEM (CONST ...)) even though this variable is a local `auto'
1882 or a local `register' variable. In effect, what has happened
1883 is that the reload pass has seen that all assignments and
1884 references for one such a local variable can be replaced by
1885 equivalent assignments and references to some static storage
1886 variable, thereby avoiding the need for a register. In such
1887 cases we're forced to lie to debuggers and tell them that
1888 this variable was itself `static'. */
1889 current_sym_code = N_LCSYM;
1891 current_sym_addr = XEXP (XEXP (home, 0), 0);
1893 else if (GET_CODE (home) == CONCAT)
1895 tree subtype = TREE_TYPE (type);
1897 /* If the variable's storage is in two parts,
1898 output each as a separate stab with a modified name. */
1899 if (WORDS_BIG_ENDIAN)
1900 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 0));
1902 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 0));
1904 /* Cast avoids warning in old compilers. */
1905 current_sym_code = (STAB_CODE_TYPE) 0;
1906 current_sym_value = 0;
1907 current_sym_addr = 0;
1908 dbxout_prepare_symbol (decl);
1910 if (WORDS_BIG_ENDIAN)
1911 dbxout_symbol_location (decl, subtype, "$real", XEXP (home, 1));
1913 dbxout_symbol_location (decl, subtype, "$imag", XEXP (home, 1));
1917 /* Address might be a MEM, when DECL is a variable-sized object.
1918 Or it might be const0_rtx, meaning previous passes
1919 want us to ignore this variable. */
1922 /* Ok, start a symtab entry and output the variable name. */
1925 #ifdef DBX_STATIC_BLOCK_START
1926 DBX_STATIC_BLOCK_START (asmfile, current_sym_code);
1929 dbxout_symbol_name (decl, suffix, letter);
1930 dbxout_type (type, 0, 0);
1931 dbxout_finish_symbol (decl);
1933 #ifdef DBX_STATIC_BLOCK_END
1934 DBX_STATIC_BLOCK_END (asmfile, current_sym_code);
1938 /* Output the symbol name of DECL for a stabs, with suffix SUFFIX.
1939 Then output LETTER to indicate the kind of location the symbol has. */
1942 dbxout_symbol_name (decl, suffix, letter)
1947 /* One slight hitch: if this is a VAR_DECL which is a static
1948 class member, we must put out the mangled name instead of the
1952 /* Note also that static member (variable) names DO NOT begin
1953 with underscores in .stabs directives. */
1954 if (DECL_LANG_SPECIFIC (decl))
1955 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
1957 name = IDENTIFIER_POINTER (DECL_NAME (decl));
1960 fprintf (asmfile, "%s \"%s%s:", ASM_STABS_OP, name,
1961 (suffix ? suffix : ""));
1963 if (letter) putc (letter, asmfile);
1967 dbxout_prepare_symbol (decl)
1971 char *filename = DECL_SOURCE_FILE (decl);
1973 dbxout_source_file (asmfile, filename);
1978 dbxout_finish_symbol (sym)
1981 #ifdef DBX_FINISH_SYMBOL
1982 DBX_FINISH_SYMBOL (sym);
1985 if (use_gnu_debug_info_extensions && sym != 0)
1986 line = DECL_SOURCE_LINE (sym);
1988 fprintf (asmfile, "\",%d,0,%d,", current_sym_code, line);
1989 if (current_sym_addr)
1990 output_addr_const (asmfile, current_sym_addr);
1992 fprintf (asmfile, "%d", current_sym_value);
1993 putc ('\n', asmfile);
1997 /* Output definitions of all the decls in a chain. */
2005 dbxout_symbol (syms, 1);
2006 syms = TREE_CHAIN (syms);
2010 /* The following two functions output definitions of function parameters.
2011 Each parameter gets a definition locating it in the parameter list.
2012 Each parameter that is a register variable gets a second definition
2013 locating it in the register.
2015 Printing or argument lists in gdb uses the definitions that
2016 locate in the parameter list. But reference to the variable in
2017 expressions uses preferentially the definition as a register. */
2019 /* Output definitions, referring to storage in the parmlist,
2020 of all the parms in PARMS, which is a chain of PARM_DECL nodes. */
2023 dbxout_parms (parms)
2026 for (; parms; parms = TREE_CHAIN (parms))
2027 if (DECL_NAME (parms) && TREE_TYPE (parms) != error_mark_node)
2029 dbxout_prepare_symbol (parms);
2031 /* Perform any necessary register eliminations on the parameter's rtl,
2032 so that the debugging output will be accurate. */
2033 DECL_INCOMING_RTL (parms)
2034 = eliminate_regs (DECL_INCOMING_RTL (parms), 0, NULL_RTX);
2035 DECL_RTL (parms) = eliminate_regs (DECL_RTL (parms), 0, NULL_RTX);
2036 #ifdef LEAF_REG_REMAP
2039 leaf_renumber_regs_insn (DECL_INCOMING_RTL (parms));
2040 leaf_renumber_regs_insn (DECL_RTL (parms));
2044 if (PARM_PASSED_IN_MEMORY (parms))
2046 rtx addr = XEXP (DECL_INCOMING_RTL (parms), 0);
2048 /* ??? Here we assume that the parm address is indexed
2049 off the frame pointer or arg pointer.
2050 If that is not true, we produce meaningless results,
2051 but do not crash. */
2052 if (GET_CODE (addr) == PLUS
2053 && GET_CODE (XEXP (addr, 1)) == CONST_INT)
2054 current_sym_value = INTVAL (XEXP (addr, 1));
2056 current_sym_value = 0;
2058 current_sym_code = N_PSYM;
2059 current_sym_addr = 0;
2062 if (DECL_NAME (parms))
2064 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms));
2066 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2067 IDENTIFIER_POINTER (DECL_NAME (parms)),
2068 DBX_MEMPARM_STABS_LETTER);
2072 current_sym_nchars = 8;
2073 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2074 DBX_MEMPARM_STABS_LETTER);
2077 if (GET_CODE (DECL_RTL (parms)) == REG
2078 && REGNO (DECL_RTL (parms)) >= 0
2079 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
2080 dbxout_type (DECL_ARG_TYPE (parms), 0, 0);
2083 int original_value = current_sym_value;
2085 /* This is the case where the parm is passed as an int or double
2086 and it is converted to a char, short or float and stored back
2087 in the parmlist. In this case, describe the parm
2088 with the variable's declared type, and adjust the address
2089 if the least significant bytes (which we are using) are not
2091 #if BYTES_BIG_ENDIAN
2092 if (TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
2093 current_sym_value += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
2094 - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
2097 if (GET_CODE (DECL_RTL (parms)) == MEM
2098 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
2099 && GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == CONST_INT
2100 && INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == current_sym_value)
2101 dbxout_type (TREE_TYPE (parms), 0, 0);
2104 current_sym_value = original_value;
2105 dbxout_type (DECL_ARG_TYPE (parms), 0, 0);
2108 current_sym_value = DEBUGGER_ARG_OFFSET (current_sym_value, addr);
2109 dbxout_finish_symbol (parms);
2111 else if (GET_CODE (DECL_RTL (parms)) == REG)
2114 char regparm_letter;
2116 /* Parm passed in registers and lives in registers or nowhere. */
2118 current_sym_code = DBX_REGPARM_STABS_CODE;
2119 regparm_letter = DBX_REGPARM_STABS_LETTER;
2120 current_sym_addr = 0;
2122 /* If parm lives in a register, use that register;
2123 pretend the parm was passed there. It would be more consistent
2124 to describe the register where the parm was passed,
2125 but in practice that register usually holds something else.
2127 If we use DECL_RTL, then we must use the declared type of
2128 the variable, not the type that it arrived in. */
2129 if (REGNO (DECL_RTL (parms)) >= 0
2130 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
2132 best_rtl = DECL_RTL (parms);
2133 parm_type = TREE_TYPE (parms);
2135 /* If the parm lives nowhere,
2136 use the register where it was passed. */
2139 best_rtl = DECL_INCOMING_RTL (parms);
2140 parm_type = DECL_ARG_TYPE (parms);
2142 current_sym_value = DBX_REGISTER_NUMBER (REGNO (best_rtl));
2145 if (DECL_NAME (parms))
2147 current_sym_nchars = 2 + IDENTIFIER_LENGTH (DECL_NAME (parms));
2148 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2149 IDENTIFIER_POINTER (DECL_NAME (parms)),
2154 current_sym_nchars = 8;
2155 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2159 dbxout_type (parm_type, 0, 0);
2160 dbxout_finish_symbol (parms);
2162 else if (GET_CODE (DECL_RTL (parms)) == MEM
2163 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
2164 && REGNO (XEXP (DECL_RTL (parms), 0)) != HARD_FRAME_POINTER_REGNUM
2165 && REGNO (XEXP (DECL_RTL (parms), 0)) != STACK_POINTER_REGNUM
2166 #if ARG_POINTER_REGNUM != HARD_FRAME_POINTER_REGNUM
2167 && REGNO (XEXP (DECL_RTL (parms), 0)) != ARG_POINTER_REGNUM
2171 /* Parm was passed via invisible reference.
2172 That is, its address was passed in a register.
2173 Output it as if it lived in that register.
2174 The debugger will know from the type
2175 that it was actually passed by invisible reference. */
2177 char regparm_letter;
2178 /* Parm passed in registers and lives in registers or nowhere. */
2180 current_sym_code = DBX_REGPARM_STABS_CODE;
2181 regparm_letter = DBX_REGPARM_STABS_LETTER;
2183 /* DECL_RTL looks like (MEM (REG...). Get the register number.
2184 If it is an unallocated pseudo-reg, then use the register where
2185 it was passed instead. */
2186 if (REGNO (XEXP (DECL_RTL (parms), 0)) >= 0
2187 && REGNO (XEXP (DECL_RTL (parms), 0)) < FIRST_PSEUDO_REGISTER)
2188 current_sym_value = REGNO (XEXP (DECL_RTL (parms), 0));
2190 current_sym_value = REGNO (DECL_INCOMING_RTL (parms));
2192 current_sym_addr = 0;
2195 if (DECL_NAME (parms))
2197 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2199 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2200 IDENTIFIER_POINTER (DECL_NAME (parms)),
2201 DBX_REGPARM_STABS_LETTER);
2205 current_sym_nchars = 8;
2206 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2207 DBX_REGPARM_STABS_LETTER);
2210 dbxout_type (TREE_TYPE (parms), 0, 0);
2211 dbxout_finish_symbol (parms);
2213 else if (GET_CODE (DECL_RTL (parms)) == MEM
2214 && XEXP (DECL_RTL (parms), 0) != const0_rtx
2215 /* ??? A constant address for a parm can happen
2216 when the reg it lives in is equiv to a constant in memory.
2217 Should make this not happen, after 2.4. */
2218 && ! CONSTANT_P (XEXP (DECL_RTL (parms), 0)))
2220 /* Parm was passed in registers but lives on the stack. */
2222 current_sym_code = N_PSYM;
2223 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))),
2224 in which case we want the value of that CONST_INT,
2225 or (MEM (REG ...)) or (MEM (MEM ...)),
2226 in which case we use a value of zero. */
2227 if (GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
2228 || GET_CODE (XEXP (DECL_RTL (parms), 0)) == MEM)
2229 current_sym_value = 0;
2231 current_sym_value = INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1));
2232 current_sym_addr = 0;
2235 if (DECL_NAME (parms))
2237 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2239 fprintf (asmfile, "%s \"%s:%c", ASM_STABS_OP,
2240 IDENTIFIER_POINTER (DECL_NAME (parms)),
2241 DBX_MEMPARM_STABS_LETTER);
2245 current_sym_nchars = 8;
2246 fprintf (asmfile, "%s \"(anon):%c", ASM_STABS_OP,
2247 DBX_MEMPARM_STABS_LETTER);
2251 = DEBUGGER_ARG_OFFSET (current_sym_value,
2252 XEXP (DECL_RTL (parms), 0));
2253 dbxout_type (TREE_TYPE (parms), 0, 0);
2254 dbxout_finish_symbol (parms);
2259 /* Output definitions for the places where parms live during the function,
2260 when different from where they were passed, when the parms were passed
2263 It is not useful to do this for parms passed in registers
2264 that live during the function in different registers, because it is
2265 impossible to look in the passed register for the passed value,
2266 so we use the within-the-function register to begin with.
2268 PARMS is a chain of PARM_DECL nodes. */
2271 dbxout_reg_parms (parms)
2274 for (; parms; parms = TREE_CHAIN (parms))
2275 if (DECL_NAME (parms))
2277 dbxout_prepare_symbol (parms);
2279 /* Report parms that live in registers during the function
2280 but were passed in memory. */
2281 if (GET_CODE (DECL_RTL (parms)) == REG
2282 && REGNO (DECL_RTL (parms)) >= 0
2283 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER
2284 && PARM_PASSED_IN_MEMORY (parms))
2285 dbxout_symbol_location (parms, TREE_TYPE (parms),
2286 0, DECL_RTL (parms));
2287 else if (GET_CODE (DECL_RTL (parms)) == CONCAT
2288 && PARM_PASSED_IN_MEMORY (parms))
2289 dbxout_symbol_location (parms, TREE_TYPE (parms),
2290 0, DECL_RTL (parms));
2291 /* Report parms that live in memory but not where they were passed. */
2292 else if (GET_CODE (DECL_RTL (parms)) == MEM
2293 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
2294 && GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == CONST_INT
2295 && PARM_PASSED_IN_MEMORY (parms)
2296 && ! rtx_equal_p (DECL_RTL (parms), DECL_INCOMING_RTL (parms)))
2298 #if 0 /* ??? It is not clear yet what should replace this. */
2299 int offset = DECL_OFFSET (parms) / BITS_PER_UNIT;
2300 /* A parm declared char is really passed as an int,
2301 so it occupies the least significant bytes.
2302 On a big-endian machine those are not the low-numbered ones. */
2303 #if BYTES_BIG_ENDIAN
2304 if (offset != -1 && TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
2305 offset += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
2306 - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
2308 if (INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)) != offset) {...}
2310 dbxout_symbol_location (parms, TREE_TYPE (parms),
2311 0, DECL_RTL (parms));
2314 else if (GET_CODE (DECL_RTL (parms)) == MEM
2315 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG)
2317 /* Parm was passed via invisible reference.
2318 That is, its address was passed in a register.
2319 Output it as if it lived in that register.
2320 The debugger will know from the type
2321 that it was actually passed by invisible reference. */
2323 current_sym_code = N_RSYM;
2325 /* DECL_RTL looks like (MEM (REG...). Get the register number. */
2326 current_sym_value = REGNO (XEXP (DECL_RTL (parms), 0));
2327 current_sym_addr = 0;
2330 if (DECL_NAME (parms))
2332 current_sym_nchars = 2 + strlen (IDENTIFIER_POINTER (DECL_NAME (parms)));
2334 fprintf (asmfile, "%s \"%s:r", ASM_STABS_OP,
2335 IDENTIFIER_POINTER (DECL_NAME (parms)));
2339 current_sym_nchars = 8;
2340 fprintf (asmfile, "%s \"(anon):r", ASM_STABS_OP);
2343 dbxout_type (TREE_TYPE (parms), 0, 0);
2344 dbxout_finish_symbol (parms);
2350 /* Given a chain of ..._TYPE nodes (as come in a parameter list),
2351 output definitions of those names, in raw form */
2359 putc (',', asmfile);
2360 dbxout_type (TREE_VALUE (args), 0, 0);
2362 args = TREE_CHAIN (args);
2366 /* Given a chain of ..._TYPE nodes,
2367 find those which have typedef names and output those names.
2368 This is to ensure those types get output. */
2371 dbxout_types (types)
2372 register tree types;
2376 if (TYPE_NAME (types)
2377 && TREE_CODE (TYPE_NAME (types)) == TYPE_DECL
2378 && ! TREE_ASM_WRITTEN (TYPE_NAME (types)))
2379 dbxout_symbol (TYPE_NAME (types), 1);
2380 types = TREE_CHAIN (types);
2384 /* Output everything about a symbol block (a BLOCK node
2385 that represents a scope level),
2386 including recursive output of contained blocks.
2388 BLOCK is the BLOCK node.
2389 DEPTH is its depth within containing symbol blocks.
2390 ARGS is usually zero; but for the outermost block of the
2391 body of a function, it is a chain of PARM_DECLs for the function parameters.
2392 We output definitions of all the register parms
2393 as if they were local variables of that block.
2395 If -g1 was used, we count blocks just the same, but output nothing
2396 except for the outermost block.
2398 Actually, BLOCK may be several blocks chained together.
2399 We handle them all in sequence. */
2402 dbxout_block (block, depth, args)
2403 register tree block;
2411 /* Ignore blocks never expanded or otherwise marked as real. */
2412 if (TREE_USED (block))
2414 #ifndef DBX_LBRAC_FIRST
2415 /* In dbx format, the syms of a block come before the N_LBRAC. */
2416 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
2417 dbxout_syms (BLOCK_VARS (block));
2419 dbxout_reg_parms (args);
2422 /* Now output an N_LBRAC symbol to represent the beginning of
2423 the block. Use the block's tree-walk order to generate
2424 the assembler symbols LBBn and LBEn
2425 that final will define around the code in this block. */
2426 if (depth > 0 && debug_info_level != DINFO_LEVEL_TERSE)
2429 blocknum = next_block_number++;
2430 ASM_GENERATE_INTERNAL_LABEL (buf, "LBB", blocknum);
2432 if (BLOCK_HANDLER_BLOCK (block))
2434 /* A catch block. Must precede N_LBRAC. */
2435 tree decl = BLOCK_VARS (block);
2438 #ifdef DBX_OUTPUT_CATCH
2439 DBX_OUTPUT_CATCH (asmfile, decl, buf);
2441 fprintf (asmfile, "%s \"%s:C1\",%d,0,0,", ASM_STABS_OP,
2442 IDENTIFIER_POINTER (DECL_NAME (decl)), N_CATCH);
2443 assemble_name (asmfile, buf);
2444 fprintf (asmfile, "\n");
2446 decl = TREE_CHAIN (decl);
2450 #ifdef DBX_OUTPUT_LBRAC
2451 DBX_OUTPUT_LBRAC (asmfile, buf);
2453 fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_LBRAC);
2454 assemble_name (asmfile, buf);
2455 #if DBX_BLOCKS_FUNCTION_RELATIVE
2456 fputc ('-', asmfile);
2457 assemble_name (asmfile, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));
2459 fprintf (asmfile, "\n");
2463 /* Count blocks the same way regardless of debug_info_level. */
2464 next_block_number++;
2466 #ifdef DBX_LBRAC_FIRST
2467 /* On some weird machines, the syms of a block
2468 come after the N_LBRAC. */
2469 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
2470 dbxout_syms (BLOCK_VARS (block));
2472 dbxout_reg_parms (args);
2475 /* Output the subblocks. */
2476 dbxout_block (BLOCK_SUBBLOCKS (block), depth + 1, NULL_TREE);
2478 /* Refer to the marker for the end of the block. */
2479 if (depth > 0 && debug_info_level != DINFO_LEVEL_TERSE)
2482 ASM_GENERATE_INTERNAL_LABEL (buf, "LBE", blocknum);
2483 #ifdef DBX_OUTPUT_RBRAC
2484 DBX_OUTPUT_RBRAC (asmfile, buf);
2486 fprintf (asmfile, "%s %d,0,0,", ASM_STABN_OP, N_RBRAC);
2487 assemble_name (asmfile, buf);
2488 #if DBX_BLOCKS_FUNCTION_RELATIVE
2489 fputc ('-', asmfile);
2490 assemble_name (asmfile, XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0));
2492 fprintf (asmfile, "\n");
2496 block = BLOCK_CHAIN (block);
2500 /* Output the information about a function and its arguments and result.
2501 Usually this follows the function's code,
2502 but on some systems, it comes before. */
2505 dbxout_really_begin_function (decl)
2508 dbxout_symbol (decl, 0);
2509 dbxout_parms (DECL_ARGUMENTS (decl));
2510 if (DECL_NAME (DECL_RESULT (decl)) != 0)
2511 dbxout_symbol (DECL_RESULT (decl), 1);
2514 /* Called at beginning of output of function definition. */
2517 dbxout_begin_function (decl)
2520 #ifdef DBX_FUNCTION_FIRST
2521 dbxout_really_begin_function (decl);
2525 /* Output dbx data for a function definition.
2526 This includes a definition of the function name itself (a symbol),
2527 definitions of the parameters (locating them in the parameter list)
2528 and then output the block that makes up the function's body
2529 (including all the auto variables of the function). */
2532 dbxout_function (decl)
2535 #ifndef DBX_FUNCTION_FIRST
2536 dbxout_really_begin_function (decl);
2538 dbxout_block (DECL_INITIAL (decl), 0, DECL_ARGUMENTS (decl));
2539 #ifdef DBX_OUTPUT_FUNCTION_END
2540 DBX_OUTPUT_FUNCTION_END (asmfile, decl);
2543 #endif /* DBX_DEBUGGING_INFO */