1 /* Output sdb-format symbol table information from GNU compiler.
2 Copyright (C) 1988, 1992, 1993, 1994, 1995 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. */
20 /* mike@tredysvr.Tredydev.Unisys.COM says:
21 I modified the struct.c example and have a nm of a .o resulting from the
22 AT&T C compiler. From the example below I would conclude the following:
24 1. All .defs from structures are emitted as scanned. The example below
25 clearly shows the symbol table entries for BoxRec2 are after the first
28 2. All functions and their locals (including statics) are emitted as scanned.
30 3. All nested unnamed union and structure .defs must be emitted before
31 the structure in which they are nested. The AT&T assembler is a
32 one pass beast as far as symbolics are concerned.
34 4. All structure .defs are emitted before the typedefs that refer to them.
36 5. All top level static and external variable definitions are moved to the
37 end of file with all top level statics occurring first before externs.
39 6. All undefined references are at the end of the file.
44 #ifdef SDB_DEBUGGING_INFO
51 #include "insn-config.h"
54 /* Mips systems use the SDB functions to dump out symbols, but
55 do not supply usable syms.h include files. */
56 #if defined(USG) && !defined(MIPS) && !defined (hpux) && !defined(WINNT) && !defined(__linux__)
58 /* Use T_INT if we don't have T_VOID. */
62 #else /* not USG, or MIPS */
64 #endif /* not USG, or MIPS */
66 /* #include <storclass.h> used to be this instead of syms.h. */
68 /* 1 if PARM is passed to this function in memory. */
70 #define PARM_PASSED_IN_MEMORY(PARM) \
71 (GET_CODE (DECL_INCOMING_RTL (PARM)) == MEM)
73 /* A C expression for the integer offset value of an automatic variable
74 (C_AUTO) having address X (an RTX). */
75 #ifndef DEBUGGER_AUTO_OFFSET
76 #define DEBUGGER_AUTO_OFFSET(X) \
77 (GET_CODE (X) == PLUS ? INTVAL (XEXP (X, 1)) : 0)
80 /* A C expression for the integer offset value of an argument (C_ARG)
81 having address X (an RTX). The nominal offset is OFFSET. */
82 #ifndef DEBUGGER_ARG_OFFSET
83 #define DEBUGGER_ARG_OFFSET(OFFSET, X) (OFFSET)
86 /* Line number of beginning of current function, minus one.
87 Negative means not in a function or not using sdb. */
89 int sdb_begin_function_line = -1;
91 /* Counter to generate unique "names" for nameless struct members. */
93 static int unnamed_struct_number = 0;
95 extern FILE *asm_out_file;
97 extern tree current_function_decl;
100 void sdbout_symbol ();
103 static void sdbout_typedefs ();
104 static void sdbout_syms ();
105 static void sdbout_one_type ();
106 static void sdbout_queue_anonymous_type ();
107 static void sdbout_dequeue_anonymous_types ();
108 static int plain_type_1 ();
110 /* Define the default sizes for various types. */
112 #ifndef CHAR_TYPE_SIZE
113 #define CHAR_TYPE_SIZE BITS_PER_UNIT
116 #ifndef SHORT_TYPE_SIZE
117 #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
120 #ifndef INT_TYPE_SIZE
121 #define INT_TYPE_SIZE BITS_PER_WORD
124 #ifndef LONG_TYPE_SIZE
125 #define LONG_TYPE_SIZE BITS_PER_WORD
128 #ifndef LONG_LONG_TYPE_SIZE
129 #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
132 #ifndef FLOAT_TYPE_SIZE
133 #define FLOAT_TYPE_SIZE BITS_PER_WORD
136 #ifndef DOUBLE_TYPE_SIZE
137 #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
140 #ifndef LONG_DOUBLE_TYPE_SIZE
141 #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
144 /* Random macros describing parts of SDB data. */
146 /* Put something here if lines get too long */
149 /* Default value of delimiter is ";". */
151 #define SDB_DELIM ";"
154 /* Maximum number of dimensions the assembler will allow. */
156 #define SDB_MAX_DIM 4
160 #define PUT_SDB_SCL(a) fprintf(asm_out_file, "\t.scl\t%d%s", (a), SDB_DELIM)
163 #ifndef PUT_SDB_INT_VAL
164 #define PUT_SDB_INT_VAL(a) fprintf (asm_out_file, "\t.val\t%d%s", (a), SDB_DELIM)
168 #define PUT_SDB_VAL(a) \
169 ( fputs ("\t.val\t", asm_out_file), \
170 output_addr_const (asm_out_file, (a)), \
171 fprintf (asm_out_file, SDB_DELIM))
175 #define PUT_SDB_DEF(a) \
176 do { fprintf (asm_out_file, "\t.def\t"); \
177 ASM_OUTPUT_LABELREF (asm_out_file, a); \
178 fprintf (asm_out_file, SDB_DELIM); } while (0)
181 #ifndef PUT_SDB_PLAIN_DEF
182 #define PUT_SDB_PLAIN_DEF(a) fprintf(asm_out_file,"\t.def\t.%s%s",a, SDB_DELIM)
185 #ifndef PUT_SDB_ENDEF
186 #define PUT_SDB_ENDEF fputs("\t.endef\n", asm_out_file)
190 #define PUT_SDB_TYPE(a) fprintf(asm_out_file, "\t.type\t0%o%s", a, SDB_DELIM)
194 #define PUT_SDB_SIZE(a) fprintf(asm_out_file, "\t.size\t%d%s", a, SDB_DELIM)
197 #ifndef PUT_SDB_START_DIM
198 #define PUT_SDB_START_DIM fprintf(asm_out_file, "\t.dim\t")
201 #ifndef PUT_SDB_NEXT_DIM
202 #define PUT_SDB_NEXT_DIM(a) fprintf(asm_out_file, "%d,", a)
205 #ifndef PUT_SDB_LAST_DIM
206 #define PUT_SDB_LAST_DIM(a) fprintf(asm_out_file, "%d%s", a, SDB_DELIM)
210 #define PUT_SDB_TAG(a) \
211 do { fprintf (asm_out_file, "\t.tag\t"); \
212 ASM_OUTPUT_LABELREF (asm_out_file, a); \
213 fprintf (asm_out_file, SDB_DELIM); } while (0)
216 #ifndef PUT_SDB_BLOCK_START
217 #define PUT_SDB_BLOCK_START(LINE) \
218 fprintf (asm_out_file, \
219 "\t.def\t.bb%s\t.val\t.%s\t.scl\t100%s\t.line\t%d%s\t.endef\n", \
220 SDB_DELIM, SDB_DELIM, SDB_DELIM, (LINE), SDB_DELIM)
223 #ifndef PUT_SDB_BLOCK_END
224 #define PUT_SDB_BLOCK_END(LINE) \
225 fprintf (asm_out_file, \
226 "\t.def\t.eb%s\t.val\t.%s\t.scl\t100%s\t.line\t%d%s\t.endef\n", \
227 SDB_DELIM, SDB_DELIM, SDB_DELIM, (LINE), SDB_DELIM)
230 #ifndef PUT_SDB_FUNCTION_START
231 #define PUT_SDB_FUNCTION_START(LINE) \
232 fprintf (asm_out_file, \
233 "\t.def\t.bf%s\t.val\t.%s\t.scl\t101%s\t.line\t%d%s\t.endef\n", \
234 SDB_DELIM, SDB_DELIM, SDB_DELIM, (LINE), SDB_DELIM)
237 #ifndef PUT_SDB_FUNCTION_END
238 #define PUT_SDB_FUNCTION_END(LINE) \
239 fprintf (asm_out_file, \
240 "\t.def\t.ef%s\t.val\t.%s\t.scl\t101%s\t.line\t%d%s\t.endef\n", \
241 SDB_DELIM, SDB_DELIM, SDB_DELIM, (LINE), SDB_DELIM)
244 #ifndef PUT_SDB_EPILOGUE_END
245 #define PUT_SDB_EPILOGUE_END(NAME) \
246 do { fprintf (asm_out_file, "\t.def\t"); \
247 ASM_OUTPUT_LABELREF (asm_out_file, NAME); \
248 fprintf (asm_out_file, \
249 "%s\t.val\t.%s\t.scl\t-1%s\t.endef\n", \
250 SDB_DELIM, SDB_DELIM, SDB_DELIM); } while (0)
253 #ifndef SDB_GENERATE_FAKE
254 #define SDB_GENERATE_FAKE(BUFFER, NUMBER) \
255 sprintf ((BUFFER), ".%dfake", (NUMBER));
258 /* Return the sdb tag identifier string for TYPE
259 if TYPE has already been defined; otherwise return a null pointer. */
261 #define KNOWN_TYPE_TAG(type) TYPE_SYMTAB_POINTER (type)
263 /* Set the sdb tag identifier string for TYPE to NAME. */
265 #define SET_KNOWN_TYPE_TAG(TYPE, NAME) \
266 TYPE_SYMTAB_POINTER (TYPE) = (NAME)
268 /* Return the name (a string) of the struct, union or enum tag
269 described by the TREE_LIST node LINK. This is 0 for an anonymous one. */
271 #define TAG_NAME(link) \
272 (((link) && TREE_PURPOSE ((link)) \
273 && IDENTIFIER_POINTER (TREE_PURPOSE ((link)))) \
274 ? IDENTIFIER_POINTER (TREE_PURPOSE ((link))) : (char *) 0)
276 /* Ensure we don't output a negative line number. */
277 #define MAKE_LINE_SAFE(line) \
278 if (line <= sdb_begin_function_line) line = sdb_begin_function_line + 1
280 /* Set up for SDB output at the start of compilation. */
283 sdbout_init (asm_file, input_file_name, syms)
285 char *input_file_name;
288 #ifdef RMS_QUICK_HACK_1
290 for (t = syms; t; t = TREE_CHAIN (t))
291 if (DECL_NAME (t) && IDENTIFIER_POINTER (DECL_NAME (t)) != 0
292 && !strcmp (IDENTIFIER_POINTER (DECL_NAME (t)), "__vtbl_ptr_type"))
293 sdbout_symbol (t, 0);
296 #if 0 /* Nothing need be output for the predefined types. */
297 /* Get all permanent types that have typedef names,
298 and output them all, except for those already output. */
300 sdbout_typedefs (syms);
306 /* return the tag identifier for type
310 tag_of_ru_type (type,link)
313 if (TYPE_SYMTAB_ADDRESS (type))
314 return TYPE_SYMTAB_ADDRESS (type);
315 if (link && TREE_PURPOSE (link)
316 && IDENTIFIER_POINTER (TREE_PURPOSE (link)))
317 TYPE_SYMTAB_ADDRESS (type) = IDENTIFIER_POINTER (TREE_PURPOSE (link));
319 return (char *) TYPE_SYMTAB_ADDRESS (type);
323 /* Return a unique string to name an anonymous type. */
330 SDB_GENERATE_FAKE (label, unnamed_struct_number);
331 unnamed_struct_number++;
332 labelstr = (char *) permalloc (strlen (label) + 1);
333 strcpy (labelstr, label);
337 /* Return the number which describes TYPE for SDB.
338 For pointers, etc., this function is recursive.
339 Each record, union or enumeral type must already have had a
340 tag number output. */
342 /* The number is given by d6d5d4d3d2d1bbbb
343 where bbbb is 4 bit basic type, and di indicate one of notype,ptr,fn,array.
344 Thus, char *foo () has bbbb=T_CHAR
347 N_BTMASK= 017 1111 basic type field.
348 N_TSHIFT= 2 derived type shift
349 N_BTSHFT= 4 Basic type shift */
351 /* Produce the number that describes a pointer, function or array type.
352 PREV is the number describing the target, value or element type.
353 DT_type describes how to transform that type. */
354 #define PUSH_DERIVED_LEVEL(DT_type,PREV) \
355 ((((PREV) & ~(int)N_BTMASK) << (int)N_TSHIFT) \
356 | ((int)DT_type << (int)N_BTSHFT) \
357 | ((PREV) & (int)N_BTMASK))
359 /* Number of elements used in sdb_dims. */
360 static int sdb_n_dims = 0;
362 /* Table of array dimensions of current type. */
363 static int sdb_dims[SDB_MAX_DIM];
365 /* Size of outermost array currently being processed. */
366 static int sdb_type_size = -1;
372 int val = plain_type_1 (type);
374 /* If we have already saved up some array dimensions, print them now. */
379 for (i = sdb_n_dims - 1; i > 0; i--)
380 PUT_SDB_NEXT_DIM (sdb_dims[i]);
381 PUT_SDB_LAST_DIM (sdb_dims[0]);
384 sdb_type_size = int_size_in_bytes (type);
385 /* Don't kill sdb if type is not laid out or has variable size. */
386 if (sdb_type_size < 0)
389 /* If we have computed the size of an array containing this type,
391 if (sdb_type_size >= 0)
393 PUT_SDB_SIZE (sdb_type_size);
400 template_name_p (name)
403 register char *ptr = IDENTIFIER_POINTER (name);
404 while (*ptr && *ptr != '<')
411 sdbout_record_type_name (type)
417 if (KNOWN_TYPE_TAG (type))
420 if (TYPE_NAME (type) != 0)
423 /* Find the IDENTIFIER_NODE for the type name. */
424 if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
425 t = TYPE_NAME (type);
426 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL)
428 t = DECL_NAME (TYPE_NAME (type));
429 /* The DECL_NAME for templates includes "<>", which breaks
430 most assemblers. Use its assembler name instead, which
431 has been mangled into being safe. */
432 if (t && template_name_p (t))
433 t = DECL_ASSEMBLER_NAME (TYPE_NAME (type));
436 /* Now get the name as a string, or invent one. */
438 name = IDENTIFIER_POINTER (t);
441 no_name = (name == 0 || *name == 0);
443 name = gen_fake_label ();
445 SET_KNOWN_TYPE_TAG (type, name);
446 #ifdef SDB_ALLOW_FORWARD_REFERENCES
448 sdbout_queue_anonymous_type (type);
457 type = void_type_node;
458 if (type == error_mark_node)
459 type = integer_type_node;
460 type = TYPE_MAIN_VARIANT (type);
462 switch (TREE_CODE (type))
468 int size = int_size_in_bytes (type) * BITS_PER_UNIT;
470 /* Carefully distinguish all the standard types of C,
471 without messing up if the language is not C.
472 Note that we check only for the names that contain spaces;
473 other names might occur by coincidence in other languages. */
474 if (TYPE_NAME (type) != 0
475 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
476 && DECL_NAME (TYPE_NAME (type)) != 0
477 && TREE_CODE (DECL_NAME (TYPE_NAME (type))) == IDENTIFIER_NODE)
479 char *name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
481 if (!strcmp (name, "unsigned char"))
483 if (!strcmp (name, "signed char"))
485 if (!strcmp (name, "unsigned int"))
487 if (!strcmp (name, "short int"))
489 if (!strcmp (name, "short unsigned int"))
491 if (!strcmp (name, "long int"))
493 if (!strcmp (name, "long unsigned int"))
497 if (size == CHAR_TYPE_SIZE)
498 return (TREE_UNSIGNED (type) ? T_UCHAR : T_CHAR);
499 if (size == SHORT_TYPE_SIZE)
500 return (TREE_UNSIGNED (type) ? T_USHORT : T_SHORT);
501 if (size == INT_TYPE_SIZE)
502 return (TREE_UNSIGNED (type) ? T_UINT : T_INT);
503 if (size == LONG_TYPE_SIZE)
504 return (TREE_UNSIGNED (type) ? T_ULONG : T_LONG);
505 if (size == LONG_LONG_TYPE_SIZE) /* better than nothing */
506 return (TREE_UNSIGNED (type) ? T_ULONG : T_LONG);
512 int size = int_size_in_bytes (type) * BITS_PER_UNIT;
513 if (size == FLOAT_TYPE_SIZE)
515 if (size == DOUBLE_TYPE_SIZE)
523 m = plain_type_1 (TREE_TYPE (type));
524 if (sdb_n_dims < SDB_MAX_DIM)
525 sdb_dims[sdb_n_dims++]
526 = (TYPE_DOMAIN (type)
527 ? TREE_INT_CST_LOW (TYPE_MAX_VALUE (TYPE_DOMAIN (type))) + 1
529 return PUSH_DERIVED_LEVEL (DT_ARY, m);
534 case QUAL_UNION_TYPE:
538 #ifdef SDB_ALLOW_FORWARD_REFERENCES
539 sdbout_record_type_name (type);
541 #ifndef SDB_ALLOW_UNKNOWN_REFERENCES
542 if ((TREE_ASM_WRITTEN (type) && KNOWN_TYPE_TAG (type) != 0)
543 #ifdef SDB_ALLOW_FORWARD_REFERENCES
544 || TYPE_MODE (type) != VOIDmode
549 /* Output the referenced structure tag name
550 only if the .def has already been finished.
551 At least on 386, the Unix assembler
552 cannot handle forward references to tags. */
553 /* But the 88100, it requires them, sigh... */
554 /* And the MIPS requires unknown refs as well... */
555 tag = KNOWN_TYPE_TAG (type);
557 /* These 3 lines used to follow the close brace.
558 However, a size of 0 without a tag implies a tag of 0,
559 so if we don't know a tag, we can't mention the size. */
560 sdb_type_size = int_size_in_bytes (type);
561 if (sdb_type_size < 0)
564 return ((TREE_CODE (type) == RECORD_TYPE) ? T_STRUCT
565 : (TREE_CODE (type) == UNION_TYPE) ? T_UNION
566 : (TREE_CODE (type) == QUAL_UNION_TYPE) ? T_UNION
572 int m = plain_type_1 (TREE_TYPE (type));
573 return PUSH_DERIVED_LEVEL (DT_PTR, m);
578 int m = plain_type_1 (TREE_TYPE (type));
579 return PUSH_DERIVED_LEVEL (DT_FCN, m);
586 /* Output the symbols defined in block number DO_BLOCK.
587 Set NEXT_BLOCK_NUMBER to 0 before calling.
589 This function works by walking the tree structure of blocks,
590 counting blocks until it finds the desired block. */
592 static int do_block = 0;
594 static int next_block_number;
602 /* Ignore blocks never expanded or otherwise marked as real. */
603 if (TREE_USED (block))
605 /* When we reach the specified block, output its symbols. */
606 if (next_block_number == do_block)
608 sdbout_syms (BLOCK_VARS (block));
611 /* If we are past the specified block, stop the scan. */
612 if (next_block_number > do_block)
617 /* Scan the blocks within this block. */
618 sdbout_block (BLOCK_SUBBLOCKS (block));
621 block = BLOCK_CHAIN (block);
625 /* Call sdbout_symbol on each decl in the chain SYMS. */
633 if (TREE_CODE (syms) != LABEL_DECL)
634 sdbout_symbol (syms, 1);
635 syms = TREE_CHAIN (syms);
639 /* Output SDB information for a symbol described by DECL.
640 LOCAL is nonzero if the symbol is not file-scope. */
643 sdbout_symbol (decl, local)
647 tree type = TREE_TYPE (decl);
648 tree context = NULL_TREE;
653 sdbout_one_type (type);
655 #if 0 /* This loses when functions are marked to be ignored,
656 which happens in the C++ front end. */
657 if (DECL_IGNORED_P (decl))
661 switch (TREE_CODE (decl))
664 /* Enum values are defined by defining the enum type. */
668 /* Don't mention a nested function under its parent. */
669 context = decl_function_context (decl);
670 if (context == current_function_decl)
672 if (DECL_EXTERNAL (decl))
674 if (GET_CODE (DECL_RTL (decl)) != MEM
675 || GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF)
677 PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
678 PUT_SDB_VAL (XEXP (DECL_RTL (decl), 0));
679 PUT_SDB_SCL (TREE_PUBLIC (decl) ? C_EXT : C_STAT);
683 /* Done with tagged types. */
684 if (DECL_NAME (decl) == 0)
686 if (DECL_IGNORED_P (decl))
689 /* Output typedef name. */
690 if (template_name_p (DECL_NAME (decl)))
691 PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
693 PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_NAME (decl)));
694 PUT_SDB_SCL (C_TPDEF);
698 /* Parm decls go in their own separate chains
699 and are output by sdbout_reg_parms and sdbout_parms. */
703 /* Don't mention a variable that is external.
704 Let the file that defines it describe it. */
705 if (DECL_EXTERNAL (decl))
708 /* Ignore __FUNCTION__, etc. */
709 if (DECL_IGNORED_P (decl))
712 /* If there was an error in the declaration, don't dump core
713 if there is no RTL associated with the variable doesn't
715 if (DECL_RTL (decl) == 0)
718 DECL_RTL (decl) = eliminate_regs (DECL_RTL (decl), 0, NULL_RTX);
719 #ifdef LEAF_REG_REMAP
721 leaf_renumber_regs_insn (DECL_RTL (decl));
723 value = DECL_RTL (decl);
725 /* Don't mention a variable at all
726 if it was completely optimized into nothingness.
728 If DECL was from an inline function, then its rtl
729 is not identically the rtl that was used in this
730 particular compilation. */
731 if (GET_CODE (value) == REG)
733 regno = REGNO (DECL_RTL (decl));
734 if (regno >= FIRST_PSEUDO_REGISTER)
737 else if (GET_CODE (value) == SUBREG)
740 while (GET_CODE (value) == SUBREG)
742 offset += SUBREG_WORD (value);
743 value = SUBREG_REG (value);
745 if (GET_CODE (value) == REG)
747 regno = REGNO (value);
748 if (regno >= FIRST_PSEUDO_REGISTER)
752 alter_subreg (DECL_RTL (decl));
753 value = DECL_RTL (decl);
755 /* Don't output anything if an auto variable
756 gets RTL that is static.
757 GAS version 2.2 can't handle such output. */
758 else if (GET_CODE (value) == MEM && CONSTANT_P (XEXP (value, 0))
759 && ! TREE_STATIC (decl))
762 /* Emit any structure, union, or enum type that has not been output.
763 This occurs for tag-less structs (et al) used to declare variables
765 if (TREE_CODE (type) == ENUMERAL_TYPE
766 || TREE_CODE (type) == RECORD_TYPE
767 || TREE_CODE (type) == UNION_TYPE
768 || TREE_CODE (type) == QUAL_UNION_TYPE)
770 if (TYPE_SIZE (type) != 0 /* not a forward reference */
771 && KNOWN_TYPE_TAG (type) == 0) /* not yet declared */
772 sdbout_one_type (type);
775 /* Defer SDB information for top-level initialized variables! */
777 && GET_CODE (value) == MEM
778 && DECL_INITIAL (decl))
781 /* C++ in 2.3 makes nameless symbols. That will be fixed later.
782 For now, avoid crashing. */
783 if (DECL_NAME (decl) == NULL_TREE)
786 /* Record the name for, starting a symtab entry. */
787 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
789 if (GET_CODE (value) == MEM
790 && GET_CODE (XEXP (value, 0)) == SYMBOL_REF)
793 if (TREE_PUBLIC (decl))
795 PUT_SDB_VAL (XEXP (value, 0));
800 PUT_SDB_VAL (XEXP (value, 0));
801 PUT_SDB_SCL (C_STAT);
807 PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (regno));
810 else if (GET_CODE (value) == MEM
811 && (GET_CODE (XEXP (value, 0)) == MEM
812 || (GET_CODE (XEXP (value, 0)) == REG
813 && REGNO (XEXP (value, 0)) != HARD_FRAME_POINTER_REGNUM
814 && REGNO (XEXP (value, 0)) != STACK_POINTER_REGNUM)))
815 /* If the value is indirect by memory or by a register
816 that isn't the frame pointer
817 then it means the object is variable-sized and address through
818 that register or stack slot. COFF has no way to represent this
819 so all we can do is output the variable as a pointer. */
822 if (GET_CODE (XEXP (value, 0)) == REG)
824 PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (REGNO (XEXP (value, 0))));
829 /* DECL_RTL looks like (MEM (MEM (PLUS (REG...)
831 We want the value of that CONST_INT. */
832 /* Encore compiler hates a newline in a macro arg, it seems. */
833 PUT_SDB_INT_VAL (DEBUGGER_AUTO_OFFSET
834 (XEXP (XEXP (value, 0), 0)));
835 PUT_SDB_SCL (C_AUTO);
838 type = build_pointer_type (TREE_TYPE (decl));
840 else if (GET_CODE (value) == MEM
841 && ((GET_CODE (XEXP (value, 0)) == PLUS
842 && GET_CODE (XEXP (XEXP (value, 0), 0)) == REG
843 && GET_CODE (XEXP (XEXP (value, 0), 1)) == CONST_INT)
844 /* This is for variables which are at offset zero from
845 the frame pointer. This happens on the Alpha.
846 Non-frame pointer registers are excluded above. */
847 || (GET_CODE (XEXP (value, 0)) == REG)))
849 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...)))
850 or (MEM (REG...)). We want the value of that CONST_INT
853 PUT_SDB_INT_VAL (DEBUGGER_AUTO_OFFSET (XEXP (value, 0)));
854 PUT_SDB_SCL (C_AUTO);
856 else if (GET_CODE (value) == MEM && GET_CODE (XEXP (value, 0)) == CONST)
858 /* Handle an obscure case which can arise when optimizing and
859 when there are few available registers. (This is *always*
860 the case for i386/i486 targets). The DECL_RTL looks like
861 (MEM (CONST ...)) even though this variable is a local `auto'
862 or a local `register' variable. In effect, what has happened
863 is that the reload pass has seen that all assignments and
864 references for one such a local variable can be replaced by
865 equivalent assignments and references to some static storage
866 variable, thereby avoiding the need for a register. In such
867 cases we're forced to lie to debuggers and tell them that
868 this variable was itself `static'. */
870 PUT_SDB_VAL (XEXP (XEXP (value, 0), 0));
871 PUT_SDB_SCL (C_STAT);
875 /* It is something we don't know how to represent for SDB. */
880 PUT_SDB_TYPE (plain_type (type));
884 /* Output SDB information for a top-level initialized variable
885 that has been delayed. */
888 sdbout_toplevel_data (decl)
891 tree type = TREE_TYPE (decl);
893 if (DECL_IGNORED_P (decl))
896 if (! (TREE_CODE (decl) == VAR_DECL
897 && GET_CODE (DECL_RTL (decl)) == MEM
898 && DECL_INITIAL (decl)))
901 PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
902 PUT_SDB_VAL (XEXP (DECL_RTL (decl), 0));
903 if (TREE_PUBLIC (decl))
909 PUT_SDB_SCL (C_STAT);
911 PUT_SDB_TYPE (plain_type (type));
915 #ifdef SDB_ALLOW_FORWARD_REFERENCES
917 /* Machinery to record and output anonymous types. */
919 static tree anonymous_types;
922 sdbout_queue_anonymous_type (type)
925 anonymous_types = saveable_tree_cons (NULL_TREE, type, anonymous_types);
929 sdbout_dequeue_anonymous_types ()
931 register tree types, link;
933 while (anonymous_types)
935 types = nreverse (anonymous_types);
936 anonymous_types = NULL_TREE;
938 for (link = types; link; link = TREE_CHAIN (link))
940 register tree type = TREE_VALUE (link);
942 if (type && ! TREE_ASM_WRITTEN (type))
943 sdbout_one_type (type);
950 /* Given a chain of ..._TYPE nodes, all of which have names,
951 output definitions of those names, as typedefs. */
959 for (link = types; link; link = TREE_CHAIN (link))
960 sdbout_one_type (link);
962 #ifdef SDB_ALLOW_FORWARD_REFERENCES
963 sdbout_dequeue_anonymous_types ();
971 if (type == error_mark_node)
972 type = integer_type_node;
973 PUT_SDB_TYPE (plain_type (type));
976 /* Output types of the fields of type TYPE, if they are structs.
978 Formerly did not chase through pointer types, since that could be circular.
979 They must come before TYPE, since forward refs are not allowed.
980 Now james@bigtex.cactus.org says to try them. */
983 sdbout_field_types (type)
987 for (tail = TYPE_FIELDS (type); tail; tail = TREE_CHAIN (tail))
988 if (TREE_CODE (TREE_TYPE (tail)) == POINTER_TYPE)
989 sdbout_one_type (TREE_TYPE (TREE_TYPE (tail)));
991 sdbout_one_type (TREE_TYPE (tail));
994 /* Use this to put out the top level defined record and union types
995 for later reference. If this is a struct with a name, then put that
996 name out. Other unnamed structs will have .xxfake labels generated so
997 that they may be referred to later.
998 The label will be stored in the KNOWN_TYPE_TAG slot of a type.
999 It may NOT be called recursively. */
1002 sdbout_one_type (type)
1007 switch (TREE_CODE (type))
1011 case QUAL_UNION_TYPE:
1013 type = TYPE_MAIN_VARIANT (type);
1014 /* Don't output a type twice. */
1015 if (TREE_ASM_WRITTEN (type))
1016 /* James said test TREE_ASM_BEING_WRITTEN here. */
1019 /* Output nothing if type is not yet defined. */
1020 if (TYPE_SIZE (type) == 0)
1023 TREE_ASM_WRITTEN (type) = 1;
1025 /* This is reputed to cause trouble with the following case,
1026 but perhaps checking TYPE_SIZE above will fix it. */
1028 /* Here is a test case:
1034 typedef struct intermediate {
1038 typedef struct badstr {
1043 TREE_ASM_BEING_WRITTEN (type) = 1;
1045 /* This change, which ought to make better output,
1046 used to make the COFF assembler unhappy.
1047 Changes involving KNOWN_TYPE_TAG may fix the problem. */
1048 /* Before really doing anything, output types we want to refer to. */
1049 /* Note that in version 1 the following two lines
1050 are not used if forward references are in use. */
1051 if (TREE_CODE (type) != ENUMERAL_TYPE)
1052 sdbout_field_types (type);
1054 TREE_ASM_WRITTEN (type) = 1;
1058 /* Output a structure type. */
1060 int size = int_size_in_bytes (type);
1063 int i, n_baseclasses = 0;
1065 /* Record the type tag, but not in its permanent place just yet. */
1066 sdbout_record_type_name (type);
1068 PUT_SDB_DEF (KNOWN_TYPE_TAG (type));
1070 switch (TREE_CODE (type))
1073 case QUAL_UNION_TYPE:
1074 PUT_SDB_SCL (C_UNTAG);
1075 PUT_SDB_TYPE (T_UNION);
1080 PUT_SDB_SCL (C_STRTAG);
1081 PUT_SDB_TYPE (T_STRUCT);
1086 PUT_SDB_SCL (C_ENTAG);
1087 PUT_SDB_TYPE (T_ENUM);
1092 PUT_SDB_SIZE (size);
1095 /* Print out the base class information with fields
1096 named after the types they hold. */
1097 if (TYPE_BINFO (type)
1098 && TYPE_BINFO_BASETYPES (type))
1099 n_baseclasses = TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type));
1100 for (i = 0; i < n_baseclasses; i++)
1102 tree child = TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (type)), i);
1103 tree child_type = BINFO_TYPE (child);
1104 tree child_type_name;
1105 if (TYPE_NAME (child_type) == 0)
1107 if (TREE_CODE (TYPE_NAME (child_type)) == IDENTIFIER_NODE)
1108 child_type_name = TYPE_NAME (child_type);
1109 else if (TREE_CODE (TYPE_NAME (child_type)) == TYPE_DECL)
1111 child_type_name = DECL_NAME (TYPE_NAME (child_type));
1112 if (child_type_name && template_name_p (child_type_name))
1114 = DECL_ASSEMBLER_NAME (TYPE_NAME (child_type));
1120 PUT_SDB_DEF (IDENTIFIER_POINTER (child_type_name));
1121 PUT_SDB_INT_VAL (TREE_INT_CST_LOW (BINFO_OFFSET (child)));
1122 PUT_SDB_SCL (member_scl);
1123 sdbout_type (BINFO_TYPE (child));
1127 /* output the individual fields */
1129 if (TREE_CODE (type) == ENUMERAL_TYPE)
1130 for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem))
1132 PUT_SDB_DEF (IDENTIFIER_POINTER (TREE_PURPOSE (tem)));
1133 PUT_SDB_INT_VAL (TREE_INT_CST_LOW (TREE_VALUE (tem)));
1134 PUT_SDB_SCL (C_MOE);
1135 PUT_SDB_TYPE (T_MOE);
1139 else /* record or union type */
1140 for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem))
1141 /* Output the name, type, position (in bits), size (in bits)
1144 /* Omit here the nameless fields that are used to skip bits.
1145 Also omit fields with variable size or position.
1146 Also omit non FIELD_DECL nodes that GNU C++ may put here. */
1147 if (TREE_CODE (tem) == FIELD_DECL
1148 && DECL_NAME (tem) != 0
1149 && TREE_CODE (DECL_SIZE (tem)) == INTEGER_CST
1150 && TREE_CODE (DECL_FIELD_BITPOS (tem)) == INTEGER_CST)
1155 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (tem));
1157 if (DECL_BIT_FIELD_TYPE (tem))
1159 PUT_SDB_INT_VAL (TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem)));
1160 PUT_SDB_SCL (C_FIELD);
1161 sdbout_type (DECL_BIT_FIELD_TYPE (tem));
1162 PUT_SDB_SIZE (TREE_INT_CST_LOW (DECL_SIZE (tem)));
1166 PUT_SDB_INT_VAL (TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem))
1168 PUT_SDB_SCL (member_scl);
1169 sdbout_type (TREE_TYPE (tem));
1173 /* output end of a structure,union, or enumeral definition */
1175 PUT_SDB_PLAIN_DEF ("eos");
1176 PUT_SDB_INT_VAL (size);
1177 PUT_SDB_SCL (C_EOS);
1178 PUT_SDB_TAG (KNOWN_TYPE_TAG (type));
1179 PUT_SDB_SIZE (size);
1186 /* The following two functions output definitions of function parameters.
1187 Each parameter gets a definition locating it in the parameter list.
1188 Each parameter that is a register variable gets a second definition
1189 locating it in the register.
1191 Printing or argument lists in gdb uses the definitions that
1192 locate in the parameter list. But reference to the variable in
1193 expressions uses preferentially the definition as a register. */
1195 /* Output definitions, referring to storage in the parmlist,
1196 of all the parms in PARMS, which is a chain of PARM_DECL nodes. */
1199 sdbout_parms (parms)
1202 for (; parms; parms = TREE_CHAIN (parms))
1203 if (DECL_NAME (parms))
1205 int current_sym_value = 0;
1206 char *name = IDENTIFIER_POINTER (DECL_NAME (parms));
1208 if (name == 0 || *name == 0)
1209 name = gen_fake_label ();
1211 /* Perform any necessary register eliminations on the parameter's rtl,
1212 so that the debugging output will be accurate. */
1213 DECL_INCOMING_RTL (parms) =
1214 eliminate_regs (DECL_INCOMING_RTL (parms), 0, NULL_RTX);
1215 DECL_RTL (parms) = eliminate_regs (DECL_RTL (parms), 0, NULL_RTX);
1217 if (PARM_PASSED_IN_MEMORY (parms))
1219 rtx addr = XEXP (DECL_INCOMING_RTL (parms), 0);
1222 /* ??? Here we assume that the parm address is indexed
1223 off the frame pointer or arg pointer.
1224 If that is not true, we produce meaningless results,
1225 but do not crash. */
1226 if (GET_CODE (addr) == PLUS
1227 && GET_CODE (XEXP (addr, 1)) == CONST_INT)
1228 current_sym_value = INTVAL (XEXP (addr, 1));
1230 current_sym_value = 0;
1232 if (GET_CODE (DECL_RTL (parms)) == REG
1233 && REGNO (DECL_RTL (parms)) >= 0
1234 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
1235 type = DECL_ARG_TYPE (parms);
1238 int original_sym_value = current_sym_value;
1240 /* This is the case where the parm is passed as an int or
1241 double and it is converted to a char, short or float
1242 and stored back in the parmlist. In this case, describe
1243 the parm with the variable's declared type, and adjust
1244 the address if the least significant bytes (which we are
1245 using) are not the first ones. */
1246 if (BYTES_BIG_ENDIAN
1247 && TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
1248 current_sym_value +=
1249 (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
1250 - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
1252 if (GET_CODE (DECL_RTL (parms)) == MEM
1253 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
1254 && (GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1))
1256 && (INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1))
1257 == current_sym_value))
1258 type = TREE_TYPE (parms);
1261 current_sym_value = original_sym_value;
1262 type = DECL_ARG_TYPE (parms);
1267 PUT_SDB_INT_VAL (DEBUGGER_ARG_OFFSET (current_sym_value, addr));
1268 PUT_SDB_SCL (C_ARG);
1269 PUT_SDB_TYPE (plain_type (type));
1272 else if (GET_CODE (DECL_RTL (parms)) == REG)
1275 /* Parm passed in registers and lives in registers or nowhere. */
1277 /* If parm lives in a register, use that register;
1278 pretend the parm was passed there. It would be more consistent
1279 to describe the register where the parm was passed,
1280 but in practice that register usually holds something else. */
1281 if (REGNO (DECL_RTL (parms)) >= 0
1282 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
1283 best_rtl = DECL_RTL (parms);
1284 /* If the parm lives nowhere,
1285 use the register where it was passed. */
1287 best_rtl = DECL_INCOMING_RTL (parms);
1290 PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (REGNO (best_rtl)));
1291 PUT_SDB_SCL (C_REGPARM);
1292 PUT_SDB_TYPE (plain_type (TREE_TYPE (parms), 0));
1295 else if (GET_CODE (DECL_RTL (parms)) == MEM
1296 && XEXP (DECL_RTL (parms), 0) != const0_rtx)
1298 /* Parm was passed in registers but lives on the stack. */
1300 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))),
1301 in which case we want the value of that CONST_INT,
1302 or (MEM (REG ...)) or (MEM (MEM ...)),
1303 in which case we use a value of zero. */
1304 if (GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
1305 || GET_CODE (XEXP (DECL_RTL (parms), 0)) == MEM)
1306 current_sym_value = 0;
1308 current_sym_value = INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1));
1310 /* Again, this assumes the offset is based on the arg pointer. */
1312 PUT_SDB_INT_VAL (DEBUGGER_ARG_OFFSET (current_sym_value,
1313 XEXP (DECL_RTL (parms), 0)));
1314 PUT_SDB_SCL (C_ARG);
1315 PUT_SDB_TYPE (plain_type (TREE_TYPE (parms), 0));
1321 /* Output definitions for the places where parms live during the function,
1322 when different from where they were passed, when the parms were passed
1325 It is not useful to do this for parms passed in registers
1326 that live during the function in different registers, because it is
1327 impossible to look in the passed register for the passed value,
1328 so we use the within-the-function register to begin with.
1330 PARMS is a chain of PARM_DECL nodes. */
1333 sdbout_reg_parms (parms)
1336 for (; parms; parms = TREE_CHAIN (parms))
1337 if (DECL_NAME (parms))
1339 char *name = IDENTIFIER_POINTER (DECL_NAME (parms));
1341 /* Report parms that live in registers during the function
1342 but were passed in memory. */
1343 if (GET_CODE (DECL_RTL (parms)) == REG
1344 && REGNO (DECL_RTL (parms)) >= 0
1345 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER
1346 && PARM_PASSED_IN_MEMORY (parms))
1348 if (name == 0 || *name == 0)
1349 name = gen_fake_label ();
1351 PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (REGNO (DECL_RTL (parms))));
1352 PUT_SDB_SCL (C_REG);
1353 PUT_SDB_TYPE (plain_type (TREE_TYPE (parms), 0));
1356 /* Report parms that live in memory but not where they were passed. */
1357 else if (GET_CODE (DECL_RTL (parms)) == MEM
1358 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
1359 && GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == CONST_INT
1360 && PARM_PASSED_IN_MEMORY (parms)
1361 && ! rtx_equal_p (DECL_RTL (parms), DECL_INCOMING_RTL (parms)))
1363 #if 0 /* ??? It is not clear yet what should replace this. */
1364 int offset = DECL_OFFSET (parms) / BITS_PER_UNIT;
1365 /* A parm declared char is really passed as an int,
1366 so it occupies the least significant bytes.
1367 On a big-endian machine those are not the low-numbered ones. */
1368 if (BYTES_BIG_ENDIAN
1370 && TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
1371 offset += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
1372 - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
1373 if (INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)) != offset) {...}
1376 if (name == 0 || *name == 0)
1377 name = gen_fake_label ();
1379 PUT_SDB_INT_VAL (DEBUGGER_AUTO_OFFSET
1380 (XEXP (DECL_RTL (parms), 0)));
1381 PUT_SDB_SCL (C_AUTO);
1382 PUT_SDB_TYPE (plain_type (TREE_TYPE (parms)));
1389 /* Describe the beginning of an internal block within a function.
1390 Also output descriptions of variables defined in this block.
1392 N is the number of the block, by order of beginning, counting from 1,
1393 and not counting the outermost (function top-level) block.
1394 The blocks match the BLOCKs in DECL_INITIAL (current_function_decl),
1395 if the count starts at 0 for the outermost one. */
1398 sdbout_begin_block (file, line, n)
1403 tree decl = current_function_decl;
1404 MAKE_LINE_SAFE (line);
1406 /* The SCO compiler does not emit a separate block for the function level
1407 scope, so we avoid it here also. However, mips ECOFF compilers do emit
1408 a separate block, so we retain it when MIPS_DEBUGGING_INFO is defined. */
1409 #ifndef MIPS_DEBUGGING_INFO
1412 PUT_SDB_BLOCK_START (line - sdb_begin_function_line);
1416 /* Include the outermost BLOCK's variables in block 1. */
1417 next_block_number = 0;
1419 sdbout_block (DECL_INITIAL (decl));
1421 /* If -g1, suppress all the internal symbols of functions
1422 except for arguments. */
1423 if (debug_info_level != DINFO_LEVEL_TERSE)
1425 next_block_number = 0;
1427 sdbout_block (DECL_INITIAL (decl));
1430 #ifdef SDB_ALLOW_FORWARD_REFERENCES
1431 sdbout_dequeue_anonymous_types ();
1435 /* Describe the end line-number of an internal block within a function. */
1438 sdbout_end_block (file, line, n)
1443 MAKE_LINE_SAFE (line);
1445 /* The SCO compiler does not emit a separate block for the function level
1446 scope, so we avoid it here also. However, mips ECOFF compilers do emit
1447 a separate block, so we retain it when MIPS_DEBUGGING_INFO is defined. */
1448 #ifndef MIPS_DEBUGGING_INFO
1451 PUT_SDB_BLOCK_END (line - sdb_begin_function_line);
1454 /* Output sdb info for the current function name.
1455 Called from assemble_start_function. */
1458 sdbout_mark_begin_function ()
1460 sdbout_symbol (current_function_decl, 0);
1463 /* Called at beginning of function body (after prologue).
1464 Record the function's starting line number, so we can output
1465 relative line numbers for the other lines.
1466 Describe beginning of outermost block.
1467 Also describe the parameter list. */
1470 sdbout_begin_function (line)
1473 sdb_begin_function_line = line - 1;
1474 PUT_SDB_FUNCTION_START (line);
1475 sdbout_parms (DECL_ARGUMENTS (current_function_decl));
1476 sdbout_reg_parms (DECL_ARGUMENTS (current_function_decl));
1479 /* Called at end of function (before epilogue).
1480 Describe end of outermost block. */
1483 sdbout_end_function (line)
1486 #ifdef SDB_ALLOW_FORWARD_REFERENCES
1487 sdbout_dequeue_anonymous_types ();
1490 MAKE_LINE_SAFE (line);
1491 PUT_SDB_FUNCTION_END (line - sdb_begin_function_line);
1493 /* Indicate we are between functions, for line-number output. */
1494 sdb_begin_function_line = -1;
1497 /* Output sdb info for the absolute end of a function.
1498 Called after the epilogue is output. */
1501 sdbout_end_epilogue ()
1503 char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl));
1504 PUT_SDB_EPILOGUE_END (name);
1507 /* Output sdb info for the given label. Called only if LABEL_NAME (insn)
1514 PUT_SDB_DEF (LABEL_NAME (insn));
1516 PUT_SDB_SCL (C_LABEL);
1517 PUT_SDB_TYPE (T_NULL);
1521 #endif /* SDB_DEBUGGING_INFO */