1 /* Output sdb-format symbol table information from GNU compiler.
2 Copyright (C) 1988, 1992, 1993, 1994 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)
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)
426 t = TYPE_NAME (type);
428 #if 1 /* As a temporary hack, use typedef names for C++ only. */
429 else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
430 && TYPE_LANG_SPECIFIC (type))
432 t = DECL_NAME (TYPE_NAME (type));
433 /* The DECL_NAME for templates includes "<>", which breaks
434 most assemblers. Use its assembler name instead, which
435 has been mangled into being safe. */
436 if (t && template_name_p (t))
437 t = DECL_ASSEMBLER_NAME (TYPE_NAME (type));
441 /* Now get the name as a string, or invent one. */
443 name = IDENTIFIER_POINTER (t);
446 no_name = (name == 0 || *name == 0);
448 name = gen_fake_label ();
450 SET_KNOWN_TYPE_TAG (type, name);
451 #ifdef SDB_ALLOW_FORWARD_REFERENCES
453 sdbout_queue_anonymous_type (type);
462 type = void_type_node;
463 if (type == error_mark_node)
464 type = integer_type_node;
465 type = TYPE_MAIN_VARIANT (type);
467 switch (TREE_CODE (type))
473 int size = int_size_in_bytes (type) * BITS_PER_UNIT;
475 /* Carefully distinguish all the standard types of C,
476 without messing up if the language is not C.
477 Note that we check only for the names that contain spaces;
478 other names might occur by coincidence in other languages. */
479 if (TYPE_NAME (type) != 0
480 && TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
481 && DECL_NAME (TYPE_NAME (type)) != 0
482 && TREE_CODE (DECL_NAME (TYPE_NAME (type))) == IDENTIFIER_NODE)
484 char *name = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (type)));
486 if (!strcmp (name, "unsigned char"))
488 if (!strcmp (name, "signed char"))
490 if (!strcmp (name, "unsigned int"))
492 if (!strcmp (name, "short int"))
494 if (!strcmp (name, "short unsigned int"))
496 if (!strcmp (name, "long int"))
498 if (!strcmp (name, "long unsigned int"))
502 if (size == CHAR_TYPE_SIZE)
503 return (TREE_UNSIGNED (type) ? T_UCHAR : T_CHAR);
504 if (size == SHORT_TYPE_SIZE)
505 return (TREE_UNSIGNED (type) ? T_USHORT : T_SHORT);
506 if (size == INT_TYPE_SIZE)
507 return (TREE_UNSIGNED (type) ? T_UINT : T_INT);
508 if (size == LONG_TYPE_SIZE)
509 return (TREE_UNSIGNED (type) ? T_ULONG : T_LONG);
515 int size = int_size_in_bytes (type) * BITS_PER_UNIT;
516 if (size == FLOAT_TYPE_SIZE)
518 if (size == DOUBLE_TYPE_SIZE)
526 m = plain_type_1 (TREE_TYPE (type));
527 if (sdb_n_dims < SDB_MAX_DIM)
528 sdb_dims[sdb_n_dims++]
529 = (TYPE_DOMAIN (type)
530 ? TREE_INT_CST_LOW (TYPE_MAX_VALUE (TYPE_DOMAIN (type))) + 1
532 return PUSH_DERIVED_LEVEL (DT_ARY, m);
537 case QUAL_UNION_TYPE:
541 #ifdef SDB_ALLOW_FORWARD_REFERENCES
542 sdbout_record_type_name (type);
544 #ifndef SDB_ALLOW_UNKNOWN_REFERENCES
545 if ((TREE_ASM_WRITTEN (type) && KNOWN_TYPE_TAG (type) != 0)
546 #ifdef SDB_ALLOW_FORWARD_REFERENCES
547 || TYPE_MODE (type) != VOIDmode
552 /* Output the referenced structure tag name
553 only if the .def has already been finished.
554 At least on 386, the Unix assembler
555 cannot handle forward references to tags. */
556 /* But the 88100, it requires them, sigh... */
557 /* And the MIPS requires unknown refs as well... */
558 tag = KNOWN_TYPE_TAG (type);
560 /* These 3 lines used to follow the close brace.
561 However, a size of 0 without a tag implies a tag of 0,
562 so if we don't know a tag, we can't mention the size. */
563 sdb_type_size = int_size_in_bytes (type);
564 if (sdb_type_size < 0)
567 return ((TREE_CODE (type) == RECORD_TYPE) ? T_STRUCT
568 : (TREE_CODE (type) == UNION_TYPE) ? T_UNION
569 : (TREE_CODE (type) == QUAL_UNION_TYPE) ? T_UNION
575 int m = plain_type_1 (TREE_TYPE (type));
576 return PUSH_DERIVED_LEVEL (DT_PTR, m);
581 int m = plain_type_1 (TREE_TYPE (type));
582 return PUSH_DERIVED_LEVEL (DT_FCN, m);
589 /* Output the symbols defined in block number DO_BLOCK.
590 Set NEXT_BLOCK_NUMBER to 0 before calling.
592 This function works by walking the tree structure of blocks,
593 counting blocks until it finds the desired block. */
595 static int do_block = 0;
597 static int next_block_number;
605 /* Ignore blocks never expanded or otherwise marked as real. */
606 if (TREE_USED (block))
608 /* When we reach the specified block, output its symbols. */
609 if (next_block_number == do_block)
611 sdbout_syms (BLOCK_VARS (block));
614 /* If we are past the specified block, stop the scan. */
615 if (next_block_number > do_block)
620 /* Scan the blocks within this block. */
621 sdbout_block (BLOCK_SUBBLOCKS (block));
624 block = BLOCK_CHAIN (block);
628 /* Call sdbout_symbol on each decl in the chain SYMS. */
636 if (TREE_CODE (syms) != LABEL_DECL)
637 sdbout_symbol (syms, 1);
638 syms = TREE_CHAIN (syms);
642 /* Output SDB information for a symbol described by DECL.
643 LOCAL is nonzero if the symbol is not file-scope. */
646 sdbout_symbol (decl, local)
650 tree type = TREE_TYPE (decl);
651 tree context = NULL_TREE;
656 sdbout_one_type (type);
658 #if 0 /* This loses when functions are marked to be ignored,
659 which happens in the C++ front end. */
660 if (DECL_IGNORED_P (decl))
664 switch (TREE_CODE (decl))
667 /* Enum values are defined by defining the enum type. */
671 /* Don't mention a nested function under its parent. */
672 context = decl_function_context (decl);
673 if (context == current_function_decl)
675 if (DECL_EXTERNAL (decl))
677 if (GET_CODE (DECL_RTL (decl)) != MEM
678 || GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF)
680 PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
681 PUT_SDB_VAL (XEXP (DECL_RTL (decl), 0));
682 PUT_SDB_SCL (TREE_PUBLIC (decl) ? C_EXT : C_STAT);
686 /* Done with tagged types. */
687 if (DECL_NAME (decl) == 0)
689 if (DECL_IGNORED_P (decl))
692 /* Output typedef name. */
693 if (template_name_p (DECL_NAME (decl)))
694 PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
696 PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_NAME (decl)));
697 PUT_SDB_SCL (C_TPDEF);
701 /* Parm decls go in their own separate chains
702 and are output by sdbout_reg_parms and sdbout_parms. */
706 /* Don't mention a variable that is external.
707 Let the file that defines it describe it. */
708 if (DECL_EXTERNAL (decl))
711 /* Ignore __FUNCTION__, etc. */
712 if (DECL_IGNORED_P (decl))
715 /* If there was an error in the declaration, don't dump core
716 if there is no RTL associated with the variable doesn't
718 if (DECL_RTL (decl) == 0)
721 DECL_RTL (decl) = eliminate_regs (DECL_RTL (decl), 0, NULL_RTX);
722 #ifdef LEAF_REG_REMAP
724 leaf_renumber_regs_insn (DECL_RTL (decl));
726 value = DECL_RTL (decl);
728 /* Don't mention a variable at all
729 if it was completely optimized into nothingness.
731 If DECL was from an inline function, then its rtl
732 is not identically the rtl that was used in this
733 particular compilation. */
734 if (GET_CODE (value) == REG)
736 regno = REGNO (DECL_RTL (decl));
737 if (regno >= FIRST_PSEUDO_REGISTER)
740 else if (GET_CODE (value) == SUBREG)
743 while (GET_CODE (value) == SUBREG)
745 offset += SUBREG_WORD (value);
746 value = SUBREG_REG (value);
748 if (GET_CODE (value) == REG)
750 regno = REGNO (value);
751 if (regno >= FIRST_PSEUDO_REGISTER)
755 alter_subreg (DECL_RTL (decl));
756 value = DECL_RTL (decl);
758 /* Don't output anything if an auto variable
759 gets RTL that is static.
760 GAS version 2.2 can't handle such output. */
761 else if (GET_CODE (value) == MEM && CONSTANT_P (XEXP (value, 0))
762 && ! TREE_STATIC (decl))
765 /* Emit any structure, union, or enum type that has not been output.
766 This occurs for tag-less structs (et al) used to declare variables
768 if (TREE_CODE (type) == ENUMERAL_TYPE
769 || TREE_CODE (type) == RECORD_TYPE
770 || TREE_CODE (type) == UNION_TYPE
771 || TREE_CODE (type) == QUAL_UNION_TYPE)
773 if (TYPE_SIZE (type) != 0 /* not a forward reference */
774 && KNOWN_TYPE_TAG (type) == 0) /* not yet declared */
775 sdbout_one_type (type);
778 /* Defer SDB information for top-level initialized variables! */
780 && GET_CODE (value) == MEM
781 && DECL_INITIAL (decl))
784 /* C++ in 2.3 makes nameless symbols. That will be fixed later.
785 For now, avoid crashing. */
786 if (DECL_NAME (decl) == NULL_TREE)
789 /* Record the name for, starting a symtab entry. */
790 if (DECL_LANG_SPECIFIC (decl))
791 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl));
793 name = IDENTIFIER_POINTER (DECL_NAME (decl));
795 if (GET_CODE (value) == MEM
796 && GET_CODE (XEXP (value, 0)) == SYMBOL_REF)
799 if (TREE_PUBLIC (decl))
801 PUT_SDB_VAL (XEXP (value, 0));
806 PUT_SDB_VAL (XEXP (value, 0));
807 PUT_SDB_SCL (C_STAT);
813 PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (regno));
816 else if (GET_CODE (value) == MEM
817 && (GET_CODE (XEXP (value, 0)) == MEM
818 || (GET_CODE (XEXP (value, 0)) == REG
819 && REGNO (XEXP (value, 0)) != HARD_FRAME_POINTER_REGNUM
820 && REGNO (XEXP (value, 0)) != STACK_POINTER_REGNUM)))
821 /* If the value is indirect by memory or by a register
822 that isn't the frame pointer
823 then it means the object is variable-sized and address through
824 that register or stack slot. COFF has no way to represent this
825 so all we can do is output the variable as a pointer. */
828 if (GET_CODE (XEXP (value, 0)) == REG)
830 PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (REGNO (XEXP (value, 0))));
835 /* DECL_RTL looks like (MEM (MEM (PLUS (REG...)
837 We want the value of that CONST_INT. */
838 /* Encore compiler hates a newline in a macro arg, it seems. */
839 PUT_SDB_INT_VAL (DEBUGGER_AUTO_OFFSET
840 (XEXP (XEXP (value, 0), 0)));
841 PUT_SDB_SCL (C_AUTO);
844 type = build_pointer_type (TREE_TYPE (decl));
846 else if (GET_CODE (value) == MEM
847 && ((GET_CODE (XEXP (value, 0)) == PLUS
848 && GET_CODE (XEXP (XEXP (value, 0), 0)) == REG
849 && GET_CODE (XEXP (XEXP (value, 0), 1)) == CONST_INT)
850 /* This is for variables which are at offset zero from
851 the frame pointer. This happens on the Alpha.
852 Non-frame pointer registers are excluded above. */
853 || (GET_CODE (XEXP (value, 0)) == REG)))
855 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...)))
856 or (MEM (REG...)). We want the value of that CONST_INT
859 PUT_SDB_INT_VAL (DEBUGGER_AUTO_OFFSET (XEXP (value, 0)));
860 PUT_SDB_SCL (C_AUTO);
862 else if (GET_CODE (value) == MEM && GET_CODE (XEXP (value, 0)) == CONST)
864 /* Handle an obscure case which can arise when optimizing and
865 when there are few available registers. (This is *always*
866 the case for i386/i486 targets). The DECL_RTL looks like
867 (MEM (CONST ...)) even though this variable is a local `auto'
868 or a local `register' variable. In effect, what has happened
869 is that the reload pass has seen that all assignments and
870 references for one such a local variable can be replaced by
871 equivalent assignments and references to some static storage
872 variable, thereby avoiding the need for a register. In such
873 cases we're forced to lie to debuggers and tell them that
874 this variable was itself `static'. */
876 PUT_SDB_VAL (XEXP (XEXP (value, 0), 0));
877 PUT_SDB_SCL (C_STAT);
881 /* It is something we don't know how to represent for SDB. */
886 PUT_SDB_TYPE (plain_type (type));
890 /* Output SDB information for a top-level initialized variable
891 that has been delayed. */
894 sdbout_toplevel_data (decl)
897 tree type = TREE_TYPE (decl);
899 if (DECL_IGNORED_P (decl))
902 if (! (TREE_CODE (decl) == VAR_DECL
903 && GET_CODE (DECL_RTL (decl)) == MEM
904 && DECL_INITIAL (decl)))
907 PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
908 PUT_SDB_VAL (XEXP (DECL_RTL (decl), 0));
909 if (TREE_PUBLIC (decl))
915 PUT_SDB_SCL (C_STAT);
917 PUT_SDB_TYPE (plain_type (type));
921 #ifdef SDB_ALLOW_FORWARD_REFERENCES
923 /* Machinery to record and output anonymous types. */
925 static tree anonymous_types;
928 sdbout_queue_anonymous_type (type)
931 anonymous_types = saveable_tree_cons (NULL_TREE, type, anonymous_types);
935 sdbout_dequeue_anonymous_types ()
937 register tree types, link;
939 while (anonymous_types)
941 types = nreverse (anonymous_types);
942 anonymous_types = NULL_TREE;
944 for (link = types; link; link = TREE_CHAIN (link))
946 register tree type = TREE_VALUE (link);
948 if (type && ! TREE_ASM_WRITTEN (type))
949 sdbout_one_type (type);
956 /* Given a chain of ..._TYPE nodes, all of which have names,
957 output definitions of those names, as typedefs. */
965 for (link = types; link; link = TREE_CHAIN (link))
966 sdbout_one_type (link);
968 #ifdef SDB_ALLOW_FORWARD_REFERENCES
969 sdbout_dequeue_anonymous_types ();
977 if (type == error_mark_node)
978 type = integer_type_node;
979 PUT_SDB_TYPE (plain_type (type));
982 /* Output types of the fields of type TYPE, if they are structs.
984 Formerly did not chase through pointer types, since that could be circular.
985 They must come before TYPE, since forward refs are not allowed.
986 Now james@bigtex.cactus.org says to try them. */
989 sdbout_field_types (type)
993 for (tail = TYPE_FIELDS (type); tail; tail = TREE_CHAIN (tail))
994 if (TREE_CODE (TREE_TYPE (tail)) == POINTER_TYPE)
995 sdbout_one_type (TREE_TYPE (TREE_TYPE (tail)));
997 sdbout_one_type (TREE_TYPE (tail));
1000 /* Use this to put out the top level defined record and union types
1001 for later reference. If this is a struct with a name, then put that
1002 name out. Other unnamed structs will have .xxfake labels generated so
1003 that they may be referred to later.
1004 The label will be stored in the KNOWN_TYPE_TAG slot of a type.
1005 It may NOT be called recursively. */
1008 sdbout_one_type (type)
1013 switch (TREE_CODE (type))
1017 case QUAL_UNION_TYPE:
1019 type = TYPE_MAIN_VARIANT (type);
1020 /* Don't output a type twice. */
1021 if (TREE_ASM_WRITTEN (type))
1022 /* James said test TREE_ASM_BEING_WRITTEN here. */
1025 /* Output nothing if type is not yet defined. */
1026 if (TYPE_SIZE (type) == 0)
1029 TREE_ASM_WRITTEN (type) = 1;
1031 /* This is reputed to cause trouble with the following case,
1032 but perhaps checking TYPE_SIZE above will fix it. */
1034 /* Here is a test case:
1040 typedef struct intermediate {
1044 typedef struct badstr {
1049 TREE_ASM_BEING_WRITTEN (type) = 1;
1051 /* This change, which ought to make better output,
1052 used to make the COFF assembler unhappy.
1053 Changes involving KNOWN_TYPE_TAG may fix the problem. */
1054 /* Before really doing anything, output types we want to refer to. */
1055 /* Note that in version 1 the following two lines
1056 are not used if forward references are in use. */
1057 if (TREE_CODE (type) != ENUMERAL_TYPE)
1058 sdbout_field_types (type);
1060 TREE_ASM_WRITTEN (type) = 1;
1064 /* Output a structure type. */
1066 int size = int_size_in_bytes (type);
1069 int i, n_baseclasses = 0;
1071 /* Record the type tag, but not in its permanent place just yet. */
1072 sdbout_record_type_name (type);
1074 PUT_SDB_DEF (KNOWN_TYPE_TAG (type));
1076 switch (TREE_CODE (type))
1079 case QUAL_UNION_TYPE:
1080 PUT_SDB_SCL (C_UNTAG);
1081 PUT_SDB_TYPE (T_UNION);
1086 PUT_SDB_SCL (C_STRTAG);
1087 PUT_SDB_TYPE (T_STRUCT);
1092 PUT_SDB_SCL (C_ENTAG);
1093 PUT_SDB_TYPE (T_ENUM);
1098 PUT_SDB_SIZE (size);
1101 /* Print out the base class information with fields
1102 named after the types they hold. */
1103 if (TYPE_BINFO (type)
1104 && TYPE_BINFO_BASETYPES (type))
1105 n_baseclasses = TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type));
1106 for (i = 0; i < n_baseclasses; i++)
1108 tree child = TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (type)), i);
1109 tree child_type = BINFO_TYPE (child);
1110 tree child_type_name;
1111 if (TYPE_NAME (child_type) == 0)
1113 if (TREE_CODE (TYPE_NAME (child_type)) == IDENTIFIER_NODE)
1114 child_type_name = TYPE_NAME (child_type);
1115 else if (TREE_CODE (TYPE_NAME (child_type)) == TYPE_DECL)
1117 child_type_name = DECL_NAME (TYPE_NAME (child_type));
1118 if (child_type_name && template_name_p (child_type_name))
1120 = DECL_ASSEMBLER_NAME (TYPE_NAME (child_type));
1126 PUT_SDB_DEF (IDENTIFIER_POINTER (child_type_name));
1127 PUT_SDB_INT_VAL (TREE_INT_CST_LOW (BINFO_OFFSET (child)));
1128 PUT_SDB_SCL (member_scl);
1129 sdbout_type (BINFO_TYPE (child));
1133 /* output the individual fields */
1135 if (TREE_CODE (type) == ENUMERAL_TYPE)
1136 for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem))
1138 PUT_SDB_DEF (IDENTIFIER_POINTER (TREE_PURPOSE (tem)));
1139 PUT_SDB_INT_VAL (TREE_INT_CST_LOW (TREE_VALUE (tem)));
1140 PUT_SDB_SCL (C_MOE);
1141 PUT_SDB_TYPE (T_MOE);
1145 else /* record or union type */
1146 for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem))
1147 /* Output the name, type, position (in bits), size (in bits)
1150 /* Omit here the nameless fields that are used to skip bits.
1151 Also omit fields with variable size or position.
1152 Also omit non FIELD_DECL nodes that GNU C++ may put here. */
1153 if (TREE_CODE (tem) == FIELD_DECL
1154 && DECL_NAME (tem) != 0
1155 && TREE_CODE (DECL_SIZE (tem)) == INTEGER_CST
1156 && TREE_CODE (DECL_FIELD_BITPOS (tem)) == INTEGER_CST)
1161 if (DECL_LANG_SPECIFIC (tem))
1162 name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (tem));
1164 name = IDENTIFIER_POINTER (DECL_NAME (tem));
1166 if (DECL_BIT_FIELD_TYPE (tem))
1168 PUT_SDB_INT_VAL (TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem)));
1169 PUT_SDB_SCL (C_FIELD);
1170 sdbout_type (DECL_BIT_FIELD_TYPE (tem));
1171 PUT_SDB_SIZE (TREE_INT_CST_LOW (DECL_SIZE (tem)));
1175 PUT_SDB_INT_VAL (TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem))
1177 PUT_SDB_SCL (member_scl);
1178 sdbout_type (TREE_TYPE (tem));
1182 /* output end of a structure,union, or enumeral definition */
1184 PUT_SDB_PLAIN_DEF ("eos");
1185 PUT_SDB_INT_VAL (size);
1186 PUT_SDB_SCL (C_EOS);
1187 PUT_SDB_TAG (KNOWN_TYPE_TAG (type));
1188 PUT_SDB_SIZE (size);
1195 /* The following two functions output definitions of function parameters.
1196 Each parameter gets a definition locating it in the parameter list.
1197 Each parameter that is a register variable gets a second definition
1198 locating it in the register.
1200 Printing or argument lists in gdb uses the definitions that
1201 locate in the parameter list. But reference to the variable in
1202 expressions uses preferentially the definition as a register. */
1204 /* Output definitions, referring to storage in the parmlist,
1205 of all the parms in PARMS, which is a chain of PARM_DECL nodes. */
1208 sdbout_parms (parms)
1211 for (; parms; parms = TREE_CHAIN (parms))
1212 if (DECL_NAME (parms))
1214 int current_sym_value = 0;
1215 char *name = IDENTIFIER_POINTER (DECL_NAME (parms));
1217 if (name == 0 || *name == 0)
1218 name = gen_fake_label ();
1220 /* Perform any necessary register eliminations on the parameter's rtl,
1221 so that the debugging output will be accurate. */
1222 DECL_INCOMING_RTL (parms) =
1223 eliminate_regs (DECL_INCOMING_RTL (parms), 0, NULL_RTX);
1224 DECL_RTL (parms) = eliminate_regs (DECL_RTL (parms), 0, NULL_RTX);
1226 if (PARM_PASSED_IN_MEMORY (parms))
1228 rtx addr = XEXP (DECL_INCOMING_RTL (parms), 0);
1231 /* ??? Here we assume that the parm address is indexed
1232 off the frame pointer or arg pointer.
1233 If that is not true, we produce meaningless results,
1234 but do not crash. */
1235 if (GET_CODE (addr) == PLUS
1236 && GET_CODE (XEXP (addr, 1)) == CONST_INT)
1237 current_sym_value = INTVAL (XEXP (addr, 1));
1239 current_sym_value = 0;
1241 if (GET_CODE (DECL_RTL (parms)) == REG
1242 && REGNO (DECL_RTL (parms)) >= 0
1243 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
1244 type = DECL_ARG_TYPE (parms);
1247 int original_sym_value = current_sym_value;
1249 /* This is the case where the parm is passed as an int or
1250 double and it is converted to a char, short or float
1251 and stored back in the parmlist. In this case, describe
1252 the parm with the variable's declared type, and adjust
1253 the address if the least significant bytes (which we are
1254 using) are not the first ones. */
1255 #if BYTES_BIG_ENDIAN
1256 if (TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
1257 current_sym_value +=
1258 (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
1259 - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
1261 if (GET_CODE (DECL_RTL (parms)) == MEM
1262 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
1263 && (GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1))
1265 && (INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1))
1266 == current_sym_value))
1267 type = TREE_TYPE (parms);
1270 current_sym_value = original_sym_value;
1271 type = DECL_ARG_TYPE (parms);
1276 PUT_SDB_INT_VAL (DEBUGGER_ARG_OFFSET (current_sym_value, addr));
1277 PUT_SDB_SCL (C_ARG);
1278 PUT_SDB_TYPE (plain_type (type));
1281 else if (GET_CODE (DECL_RTL (parms)) == REG)
1284 /* Parm passed in registers and lives in registers or nowhere. */
1286 /* If parm lives in a register, use that register;
1287 pretend the parm was passed there. It would be more consistent
1288 to describe the register where the parm was passed,
1289 but in practice that register usually holds something else. */
1290 if (REGNO (DECL_RTL (parms)) >= 0
1291 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
1292 best_rtl = DECL_RTL (parms);
1293 /* If the parm lives nowhere,
1294 use the register where it was passed. */
1296 best_rtl = DECL_INCOMING_RTL (parms);
1299 PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (REGNO (best_rtl)));
1300 PUT_SDB_SCL (C_REGPARM);
1301 PUT_SDB_TYPE (plain_type (TREE_TYPE (parms), 0));
1304 else if (GET_CODE (DECL_RTL (parms)) == MEM
1305 && XEXP (DECL_RTL (parms), 0) != const0_rtx)
1307 /* Parm was passed in registers but lives on the stack. */
1309 /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))),
1310 in which case we want the value of that CONST_INT,
1311 or (MEM (REG ...)) or (MEM (MEM ...)),
1312 in which case we use a value of zero. */
1313 if (GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
1314 || GET_CODE (XEXP (DECL_RTL (parms), 0)) == MEM)
1315 current_sym_value = 0;
1317 current_sym_value = INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1));
1319 /* Again, this assumes the offset is based on the arg pointer. */
1321 PUT_SDB_INT_VAL (DEBUGGER_ARG_OFFSET (current_sym_value,
1322 XEXP (DECL_RTL (parms), 0)));
1323 PUT_SDB_SCL (C_ARG);
1324 PUT_SDB_TYPE (plain_type (TREE_TYPE (parms), 0));
1330 /* Output definitions for the places where parms live during the function,
1331 when different from where they were passed, when the parms were passed
1334 It is not useful to do this for parms passed in registers
1335 that live during the function in different registers, because it is
1336 impossible to look in the passed register for the passed value,
1337 so we use the within-the-function register to begin with.
1339 PARMS is a chain of PARM_DECL nodes. */
1342 sdbout_reg_parms (parms)
1345 for (; parms; parms = TREE_CHAIN (parms))
1346 if (DECL_NAME (parms))
1348 char *name = IDENTIFIER_POINTER (DECL_NAME (parms));
1350 /* Report parms that live in registers during the function
1351 but were passed in memory. */
1352 if (GET_CODE (DECL_RTL (parms)) == REG
1353 && REGNO (DECL_RTL (parms)) >= 0
1354 && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER
1355 && PARM_PASSED_IN_MEMORY (parms))
1357 if (name == 0 || *name == 0)
1358 name = gen_fake_label ();
1360 PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (REGNO (DECL_RTL (parms))));
1361 PUT_SDB_SCL (C_REG);
1362 PUT_SDB_TYPE (plain_type (TREE_TYPE (parms), 0));
1365 /* Report parms that live in memory but not where they were passed. */
1366 else if (GET_CODE (DECL_RTL (parms)) == MEM
1367 && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
1368 && GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == CONST_INT
1369 && PARM_PASSED_IN_MEMORY (parms)
1370 && ! rtx_equal_p (DECL_RTL (parms), DECL_INCOMING_RTL (parms)))
1372 #if 0 /* ??? It is not clear yet what should replace this. */
1373 int offset = DECL_OFFSET (parms) / BITS_PER_UNIT;
1374 /* A parm declared char is really passed as an int,
1375 so it occupies the least significant bytes.
1376 On a big-endian machine those are not the low-numbered ones. */
1377 #if BYTES_BIG_ENDIAN
1378 if (offset != -1 && TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
1379 offset += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
1380 - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
1382 if (INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)) != offset) {...}
1385 if (name == 0 || *name == 0)
1386 name = gen_fake_label ();
1388 PUT_SDB_INT_VAL (DEBUGGER_AUTO_OFFSET
1389 (XEXP (DECL_RTL (parms), 0)));
1390 PUT_SDB_SCL (C_AUTO);
1391 PUT_SDB_TYPE (plain_type (TREE_TYPE (parms)));
1398 /* Describe the beginning of an internal block within a function.
1399 Also output descriptions of variables defined in this block.
1401 N is the number of the block, by order of beginning, counting from 1,
1402 and not counting the outermost (function top-level) block.
1403 The blocks match the BLOCKs in DECL_INITIAL (current_function_decl),
1404 if the count starts at 0 for the outermost one. */
1407 sdbout_begin_block (file, line, n)
1412 tree decl = current_function_decl;
1413 MAKE_LINE_SAFE (line);
1415 /* The SCO compiler does not emit a separate block for the function level
1416 scope, so we avoid it here also. However, mips ECOFF compilers do emit
1417 a separate block, so we retain it when MIPS_DEBUGGING_INFO is defined. */
1418 #ifndef MIPS_DEBUGGING_INFO
1421 PUT_SDB_BLOCK_START (line - sdb_begin_function_line);
1425 /* Include the outermost BLOCK's variables in block 1. */
1426 next_block_number = 0;
1428 sdbout_block (DECL_INITIAL (decl));
1430 /* If -g1, suppress all the internal symbols of functions
1431 except for arguments. */
1432 if (debug_info_level != DINFO_LEVEL_TERSE)
1434 next_block_number = 0;
1436 sdbout_block (DECL_INITIAL (decl));
1439 #ifdef SDB_ALLOW_FORWARD_REFERENCES
1440 sdbout_dequeue_anonymous_types ();
1444 /* Describe the end line-number of an internal block within a function. */
1447 sdbout_end_block (file, line, n)
1452 MAKE_LINE_SAFE (line);
1454 /* The SCO compiler does not emit a separate block for the function level
1455 scope, so we avoid it here also. However, mips ECOFF compilers do emit
1456 a separate block, so we retain it when MIPS_DEBUGGING_INFO is defined. */
1457 #ifndef MIPS_DEBUGGING_INFO
1460 PUT_SDB_BLOCK_END (line - sdb_begin_function_line);
1463 /* Output sdb info for the current function name.
1464 Called from assemble_start_function. */
1467 sdbout_mark_begin_function ()
1469 sdbout_symbol (current_function_decl, 0);
1472 /* Called at beginning of function body (after prologue).
1473 Record the function's starting line number, so we can output
1474 relative line numbers for the other lines.
1475 Describe beginning of outermost block.
1476 Also describe the parameter list. */
1479 sdbout_begin_function (line)
1482 sdb_begin_function_line = line - 1;
1483 PUT_SDB_FUNCTION_START (line);
1484 sdbout_parms (DECL_ARGUMENTS (current_function_decl));
1485 sdbout_reg_parms (DECL_ARGUMENTS (current_function_decl));
1488 /* Called at end of function (before epilogue).
1489 Describe end of outermost block. */
1492 sdbout_end_function (line)
1495 #ifdef SDB_ALLOW_FORWARD_REFERENCES
1496 sdbout_dequeue_anonymous_types ();
1499 MAKE_LINE_SAFE (line);
1500 PUT_SDB_FUNCTION_END (line - sdb_begin_function_line);
1502 /* Indicate we are between functions, for line-number output. */
1503 sdb_begin_function_line = -1;
1506 /* Output sdb info for the absolute end of a function.
1507 Called after the epilogue is output. */
1510 sdbout_end_epilogue ()
1512 char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl));
1513 PUT_SDB_EPILOGUE_END (name);
1516 /* Output sdb info for the given label. Called only if LABEL_NAME (insn)
1523 PUT_SDB_DEF (LABEL_NAME (insn));
1525 PUT_SDB_SCL (C_LABEL);
1526 PUT_SDB_TYPE (T_NULL);
1530 #endif /* SDB_DEBUGGING_INFO */