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1.1 root 1: /* Output sdb-format symbol table information from GNU compiler.
2: Copyright (C) 1988, 1992 Free Software Foundation, Inc.
3:
4: This file is part of GNU CC.
5:
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)
9: any later version.
10:
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.
15:
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. */
19:
20: /* [email protected] 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:
23:
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
26: function.
27:
28: 2. All functions and their locals (including statics) are emitted as scanned.
29:
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.
33:
34: 4. All structure .defs are emitted before the typedefs that refer to them.
35:
36: 5. All top level static and external variable definitions are moved to the
1.1.1.3 root 37: end of file with all top level statics occurring first before externs.
1.1 root 38:
39: 6. All undefined references are at the end of the file.
40: */
41:
42: #include "config.h"
43:
44: #ifdef SDB_DEBUGGING_INFO
45:
46: #include "tree.h"
47: #include "rtl.h"
48: #include <stdio.h>
49: #include "regs.h"
50: #include "flags.h"
51: #include "insn-config.h"
52: #include "reload.h"
53:
54: /* Mips systems use the SDB functions to dump out symbols, but
55: do not supply usable syms.h include files. */
1.1.1.4 ! root 56: #if defined(USG) && !defined(MIPS) && !defined (hpux)
1.1 root 57: #include <syms.h>
58: /* Use T_INT if we don't have T_VOID. */
59: #ifndef T_VOID
60: #define T_VOID T_INT
61: #endif
62: #else /* not USG, or MIPS */
63: #include "gsyms.h"
64: #endif /* not USG, or MIPS */
65:
66: /* #include <storclass.h> used to be this instead of syms.h. */
67:
68: /* 1 if PARM is passed to this function in memory. */
69:
70: #define PARM_PASSED_IN_MEMORY(PARM) \
71: (GET_CODE (DECL_INCOMING_RTL (PARM)) == MEM)
72:
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)
78: #endif
79:
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)
84: #endif
85:
86: /* Line number of beginning of current function, minus one.
87: Negative means not in a function or not using sdb. */
88:
89: int sdb_begin_function_line = -1;
90:
91: /* Counter to generate unique "names" for nameless struct members. */
92:
93: static int unnamed_struct_number = 0;
94:
95: extern FILE *asm_out_file;
96:
97: extern tree current_function_decl;
98:
99: void sdbout_init ();
100: void sdbout_symbol ();
101: void sdbout_types();
102:
103: static void sdbout_typedefs ();
104: static void sdbout_syms ();
105: static void sdbout_one_type ();
106: static void sdbout_queue_anonymous_type ();
1.1.1.2 root 107: static void sdbout_dequeue_anonymous_types ();
1.1 root 108: static int plain_type_1 ();
109:
110: /* Define the default sizes for various types. */
111:
112: #ifndef CHAR_TYPE_SIZE
113: #define CHAR_TYPE_SIZE BITS_PER_UNIT
114: #endif
115:
116: #ifndef SHORT_TYPE_SIZE
117: #define SHORT_TYPE_SIZE (BITS_PER_UNIT * MIN ((UNITS_PER_WORD + 1) / 2, 2))
118: #endif
119:
120: #ifndef INT_TYPE_SIZE
121: #define INT_TYPE_SIZE BITS_PER_WORD
122: #endif
123:
124: #ifndef LONG_TYPE_SIZE
125: #define LONG_TYPE_SIZE BITS_PER_WORD
126: #endif
127:
128: #ifndef LONG_LONG_TYPE_SIZE
129: #define LONG_LONG_TYPE_SIZE (BITS_PER_WORD * 2)
130: #endif
131:
132: #ifndef FLOAT_TYPE_SIZE
133: #define FLOAT_TYPE_SIZE BITS_PER_WORD
134: #endif
135:
136: #ifndef DOUBLE_TYPE_SIZE
137: #define DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
138: #endif
139:
140: #ifndef LONG_DOUBLE_TYPE_SIZE
141: #define LONG_DOUBLE_TYPE_SIZE (BITS_PER_WORD * 2)
142: #endif
143:
144: /* Random macros describing parts of SDB data. */
145:
146: /* Put something here if lines get too long */
147: #define CONTIN
148:
149: /* Default value of delimiter is ";". */
150: #ifndef SDB_DELIM
151: #define SDB_DELIM ";"
152: #endif
153:
154: /* Maximum number of dimensions the assembler will allow. */
155: #ifndef SDB_MAX_DIM
156: #define SDB_MAX_DIM 4
157: #endif
158:
159: #ifndef PUT_SDB_SCL
160: #define PUT_SDB_SCL(a) fprintf(asm_out_file, "\t.scl\t%d%s", (a), SDB_DELIM)
161: #endif
162:
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)
165: #endif
166:
167: #ifndef PUT_SDB_VAL
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))
172: #endif
173:
174: #ifndef PUT_SDB_DEF
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)
179: #endif
180:
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)
183: #endif
184:
185: #ifndef PUT_SDB_ENDEF
186: #define PUT_SDB_ENDEF fputs("\t.endef\n", asm_out_file)
187: #endif
188:
189: #ifndef PUT_SDB_TYPE
190: #define PUT_SDB_TYPE(a) fprintf(asm_out_file, "\t.type\t0%o%s", a, SDB_DELIM)
191: #endif
192:
193: #ifndef PUT_SDB_SIZE
194: #define PUT_SDB_SIZE(a) fprintf(asm_out_file, "\t.size\t%d%s", a, SDB_DELIM)
195: #endif
196:
197: #ifndef PUT_SDB_START_DIM
198: #define PUT_SDB_START_DIM fprintf(asm_out_file, "\t.dim\t")
199: #endif
200:
201: #ifndef PUT_SDB_NEXT_DIM
202: #define PUT_SDB_NEXT_DIM(a) fprintf(asm_out_file, "%d,", a)
203: #endif
204:
205: #ifndef PUT_SDB_LAST_DIM
206: #define PUT_SDB_LAST_DIM(a) fprintf(asm_out_file, "%d%s", a, SDB_DELIM)
207: #endif
208:
209: #ifndef PUT_SDB_TAG
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)
214: #endif
215:
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)
221: #endif
222:
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)
228: #endif
229:
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)
235: #endif
236:
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)
242: #endif
243:
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)
251: #endif
252:
253: #ifndef SDB_GENERATE_FAKE
254: #define SDB_GENERATE_FAKE(BUFFER, NUMBER) \
255: sprintf ((BUFFER), ".%dfake", (NUMBER));
256: #endif
257:
258: /* Return the sdb tag identifier string for TYPE
259: if TYPE has already been defined; otherwise return a null pointer. */
260:
261: #define KNOWN_TYPE_TAG(type) (char *)(TYPE_SYMTAB_ADDRESS (type))
262:
263: /* Set the sdb tag identifier string for TYPE to NAME. */
264:
265: #define SET_KNOWN_TYPE_TAG(TYPE, NAME) \
266: (TYPE_SYMTAB_ADDRESS (TYPE) = (int)(NAME))
267:
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. */
270:
271: #define TAG_NAME(link) \
272: (((link) && TREE_PURPOSE ((link)) \
273: && IDENTIFIER_POINTER (TREE_PURPOSE ((link)))) \
274: ? IDENTIFIER_POINTER (TREE_PURPOSE ((link))) : (char *) 0)
275:
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
279:
280: /* Set up for SDB output at the start of compilation. */
281:
282: void
283: sdbout_init (asm_file, input_file_name, syms)
284: FILE *asm_file;
285: char *input_file_name;
286: tree syms;
287: {
288: #if 0 /* Nothing need be output for the predefined types. */
289: /* Get all permanent types that have typedef names,
290: and output them all, except for those already output. */
291:
292: sdbout_typedefs (syms);
293: #endif
294: }
295:
296: #if 0
297:
298: /* return the tag identifier for type
299: */
300:
301: char *
302: tag_of_ru_type (type,link)
303: tree type,link;
304: {
305: if (TYPE_SYMTAB_ADDRESS (type))
306: return (char *)TYPE_SYMTAB_ADDRESS (type);
307: if (link && TREE_PURPOSE (link)
308: && IDENTIFIER_POINTER (TREE_PURPOSE (link)))
309: TYPE_SYMTAB_ADDRESS (type)
310: = (int)IDENTIFIER_POINTER (TREE_PURPOSE (link));
311: else
312: return (char *) TYPE_SYMTAB_ADDRESS (type);
313: }
314: #endif
315:
316: /* Return a unique string to name an anonymous type. */
317:
318: static char *
319: gen_fake_label ()
320: {
321: char label[10];
322: char *labelstr;
323: SDB_GENERATE_FAKE (label, unnamed_struct_number);
324: unnamed_struct_number++;
325: labelstr = (char *) permalloc (strlen (label) + 1);
326: strcpy (labelstr, label);
327: return labelstr;
328: }
329:
330: /* Return the number which describes TYPE for SDB.
331: For pointers, etc., this function is recursive.
332: Each record, union or enumeral type must already have had a
333: tag number output. */
334:
335: /* The number is given by d6d5d4d3d2d1bbbb
336: where bbbb is 4 bit basic type, and di indicate one of notype,ptr,fn,array.
337: Thus, char *foo () has bbbb=T_CHAR
338: d1=D_FCN
339: d2=D_PTR
340: N_BTMASK= 017 1111 basic type field.
341: N_TSHIFT= 2 derived type shift
342: N_BTSHFT= 4 Basic type shift */
343:
344: /* Produce the number that describes a pointer, function or array type.
345: PREV is the number describing the target, value or element type.
346: DT_type describes how to transform that type. */
347: #define PUSH_DERIVED_LEVEL(DT_type,PREV) \
348: ((((PREV)&~N_BTMASK)<<N_TSHIFT)|(DT_type<<N_BTSHFT)|(PREV&N_BTMASK))
349:
350: /* Number of elements used in sdb_dims. */
351: static int sdb_n_dims = 0;
352:
353: /* Table of array dimensions of current type. */
354: static int sdb_dims[SDB_MAX_DIM];
355:
356: /* Size of outermost array currently being processed. */
357: static int sdb_type_size = -1;
358:
359: static int
360: plain_type (type)
361: tree type;
362: {
363: int val = plain_type_1 (type);
364:
365: /* If we have already saved up some array dimensions, print them now. */
366: if (sdb_n_dims > 0)
367: {
368: int i;
369: PUT_SDB_START_DIM;
370: for (i = sdb_n_dims - 1; i > 0; i--)
371: PUT_SDB_NEXT_DIM (sdb_dims[i]);
372: PUT_SDB_LAST_DIM (sdb_dims[0]);
373: sdb_n_dims = 0;
374:
375: sdb_type_size = int_size_in_bytes (type);
376: /* Don't kill sdb if type is not laid out or has variable size. */
377: if (sdb_type_size < 0)
378: sdb_type_size = 0;
379: }
380: /* If we have computed the size of an array containing this type,
381: print it now. */
382: if (sdb_type_size >= 0)
383: {
384: PUT_SDB_SIZE (sdb_type_size);
385: sdb_type_size = -1;
386: }
387: return val;
388: }
389:
1.1.1.4 ! root 390: static int
! 391: template_name_p (name)
! 392: tree name;
! 393: {
! 394: register char *ptr = IDENTIFIER_POINTER (name);
! 395: while (*ptr && *ptr != '<')
! 396: ptr++;
! 397:
! 398: return *ptr != '\0';
! 399: }
! 400:
1.1 root 401: static void
402: sdbout_record_type_name (type)
403: tree type;
404: {
405: char *name = 0;
406: int no_name;
407:
408: if (KNOWN_TYPE_TAG (type))
409: return;
410:
411: if (TYPE_NAME (type) != 0)
412: {
413: tree t = 0;
414: /* Find the IDENTIFIER_NODE for the type name. */
415: if (TREE_CODE (TYPE_NAME (type)) == IDENTIFIER_NODE)
416: {
417: t = TYPE_NAME (type);
418: }
419: #if 1 /* As a temprary hack, use typedef names for C++ only. */
420: else if (TREE_CODE (TYPE_NAME (type)) == TYPE_DECL
421: && TYPE_LANG_SPECIFIC (type))
422: {
423: t = DECL_NAME (TYPE_NAME (type));
1.1.1.4 ! root 424: /* The DECL_NAME for templates includes "<>", which breaks
! 425: most assemblers. Use its assembler name instead, which
! 426: has been mangled into being safe. */
! 427: if (t && template_name_p (t))
! 428: t = DECL_ASSEMBLER_NAME (TYPE_NAME (type));
1.1 root 429: }
430: #endif
431:
432: /* Now get the name as a string, or invent one. */
1.1.1.4 ! root 433: if (t != NULL_TREE)
1.1 root 434: name = IDENTIFIER_POINTER (t);
435: }
436:
437: no_name = (name == 0 || *name == 0);
438: if (no_name)
439: name = gen_fake_label ();
440:
441: SET_KNOWN_TYPE_TAG (type, name);
442: #ifdef SDB_ALLOW_FORWARD_REFERENCES
443: if (no_name)
444: sdbout_queue_anonymous_type (type);
445: #endif
446: }
447:
448: static int
449: plain_type_1 (type)
450: tree type;
451: {
452: if (type == 0)
453: type = void_type_node;
454: if (type == error_mark_node)
455: type = integer_type_node;
456: type = TYPE_MAIN_VARIANT (type);
457:
458: switch (TREE_CODE (type))
459: {
460: case VOID_TYPE:
461: return T_VOID;
462: case INTEGER_TYPE:
463: {
464: int size = int_size_in_bytes (type) * BITS_PER_UNIT;
465: if (size == CHAR_TYPE_SIZE)
466: return (TREE_UNSIGNED (type) ? T_UCHAR : T_CHAR);
467: if (size == SHORT_TYPE_SIZE)
468: return (TREE_UNSIGNED (type) ? T_USHORT : T_SHORT);
469: if (size == INT_TYPE_SIZE)
470: return (TREE_UNSIGNED (type) ? T_UINT : T_INT);
1.1.1.4 ! root 471: if (size == LONG_TYPE_SIZE)
! 472: return (TREE_UNSIGNED (type) ? T_ULONG : T_LONG);
1.1 root 473: return 0;
474: }
475:
476: case REAL_TYPE:
477: {
478: int size = int_size_in_bytes (type) * BITS_PER_UNIT;
479: if (size == FLOAT_TYPE_SIZE)
480: return T_FLOAT;
481: if (size == DOUBLE_TYPE_SIZE)
482: return T_DOUBLE;
483: return 0;
484: }
485:
486: case ARRAY_TYPE:
487: {
488: int m;
489: m = plain_type_1 (TREE_TYPE (type));
490: if (sdb_n_dims < SDB_MAX_DIM)
491: sdb_dims[sdb_n_dims++]
492: = (TYPE_DOMAIN (type)
493: ? TREE_INT_CST_LOW (TYPE_MAX_VALUE (TYPE_DOMAIN (type))) + 1
494: : 0);
495: return PUSH_DERIVED_LEVEL (DT_ARY, m);
496: }
497:
498: case RECORD_TYPE:
499: case UNION_TYPE:
500: case ENUMERAL_TYPE:
501: {
502: char *tag;
503: #ifdef SDB_ALLOW_FORWARD_REFERENCES
504: sdbout_record_type_name (type);
505: #endif
506: #ifndef SDB_ALLOW_UNKNOWN_REFERENCES
507: if ((TREE_ASM_WRITTEN (type) && KNOWN_TYPE_TAG (type) != 0)
508: #ifdef SDB_ALLOW_FORWARD_REFERENCES
509: || TYPE_MODE (type) != VOIDmode
510: #endif
511: )
512: #endif
513: {
514: /* Output the referenced structure tag name
515: only if the .def has already been finished.
516: At least on 386, the Unix assembler
517: cannot handle forward references to tags. */
518: /* But the 88100, it requires them, sigh... */
519: /* And the MIPS requires unknown refs as well... */
520: tag = KNOWN_TYPE_TAG (type);
521: PUT_SDB_TAG (tag);
522: /* These 3 lines used to follow the close brace.
523: However, a size of 0 without a tag implies a tag of 0,
524: so if we don't know a tag, we can't mention the size. */
525: sdb_type_size = int_size_in_bytes (type);
526: if (sdb_type_size < 0)
527: sdb_type_size = 0;
528: }
529: return ((TREE_CODE (type) == RECORD_TYPE) ? T_STRUCT
530: : (TREE_CODE (type) == UNION_TYPE) ? T_UNION
531: : T_ENUM);
532: }
533: case POINTER_TYPE:
534: case REFERENCE_TYPE:
535: {
536: int m = plain_type_1 (TREE_TYPE (type));
537: return PUSH_DERIVED_LEVEL (DT_PTR, m);
538: }
539: case FUNCTION_TYPE:
540: case METHOD_TYPE:
541: {
542: int m = plain_type_1 (TREE_TYPE (type));
543: return PUSH_DERIVED_LEVEL (DT_FCN, m);
544: }
545: default:
546: return 0;
547: }
548: }
549:
550: /* Output the symbols defined in block number DO_BLOCK.
551: Set NEXT_BLOCK_NUMBER to 0 before calling.
552:
553: This function works by walking the tree structure of blocks,
554: counting blocks until it finds the desired block. */
555:
556: static int do_block = 0;
557:
558: static int next_block_number;
559:
560: static void
561: sdbout_block (block)
562: register tree block;
563: {
564: while (block)
565: {
566: /* Ignore blocks never expanded or otherwise marked as real. */
567: if (TREE_USED (block))
568: {
569: /* When we reach the specified block, output its symbols. */
570: if (next_block_number == do_block)
571: {
572: sdbout_syms (BLOCK_VARS (block));
573: }
574:
575: /* If we are past the specified block, stop the scan. */
576: if (next_block_number > do_block)
577: return;
578:
579: next_block_number++;
580:
581: /* Scan the blocks within this block. */
582: sdbout_block (BLOCK_SUBBLOCKS (block));
583: }
584:
585: block = BLOCK_CHAIN (block);
586: }
587: }
588:
589: /* Call sdbout_symbol on each decl in the chain SYMS. */
590:
591: static void
592: sdbout_syms (syms)
593: tree syms;
594: {
595: while (syms)
596: {
597: if (TREE_CODE (syms) != LABEL_DECL)
598: sdbout_symbol (syms, 1);
599: syms = TREE_CHAIN (syms);
600: }
601: }
602:
603: /* Output SDB information for a symbol described by DECL.
604: LOCAL is nonzero if the symbol is not file-scope. */
605:
606: void
607: sdbout_symbol (decl, local)
608: tree decl;
609: int local;
610: {
611: int letter = 0;
612: tree type = TREE_TYPE (decl);
613: tree context = NULL_TREE;
614: rtx value;
615: int regno = -1;
616: char *name;
617:
618: sdbout_one_type (type);
619:
1.1.1.3 root 620: #if 0 /* This loses when functions are marked to be ignored,
621: which happens in the C++ front end. */
622: if (DECL_IGNORED_P (decl))
623: return;
624: #endif
625:
1.1 root 626: switch (TREE_CODE (decl))
627: {
628: case CONST_DECL:
629: /* Enum values are defined by defining the enum type. */
630: return;
631:
632: case FUNCTION_DECL:
633: /* Don't mention a nested function under its parent. */
634: context = decl_function_context (decl);
635: if (context == current_function_decl)
636: return;
1.1.1.4 ! root 637: if (DECL_EXTERNAL (decl))
1.1 root 638: return;
639: if (GET_CODE (DECL_RTL (decl)) != MEM
640: || GET_CODE (XEXP (DECL_RTL (decl), 0)) != SYMBOL_REF)
641: return;
642: PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
643: PUT_SDB_VAL (XEXP (DECL_RTL (decl), 0));
644: PUT_SDB_SCL (TREE_PUBLIC (decl) ? C_EXT : C_STAT);
645: break;
646:
647: case TYPE_DECL:
648: /* Done with tagged types. */
649: if (DECL_NAME (decl) == 0)
650: return;
1.1.1.3 root 651: if (DECL_IGNORED_P (decl))
652: return;
1.1 root 653:
654: /* Output typedef name. */
1.1.1.4 ! root 655: if (template_name_p (DECL_NAME (decl)))
! 656: PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
! 657: else
! 658: PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_NAME (decl)));
1.1 root 659: PUT_SDB_SCL (C_TPDEF);
660: break;
661:
662: case PARM_DECL:
663: /* Parm decls go in their own separate chains
664: and are output by sdbout_reg_parms and sdbout_parms. */
665: abort ();
666:
667: case VAR_DECL:
668: /* Don't mention a variable that is external.
669: Let the file that defines it describe it. */
1.1.1.4 ! root 670: if (DECL_EXTERNAL (decl))
1.1 root 671: return;
672:
1.1.1.3 root 673: /* Ignore __FUNCTION__, etc. */
674: if (DECL_IGNORED_P (decl))
675: return;
676:
1.1 root 677: /* If there was an error in the declaration, don't dump core
678: if there is no RTL associated with the variable doesn't
679: exist. */
680: if (DECL_RTL (decl) == 0)
681: return;
682:
1.1.1.4 ! root 683: DECL_RTL (decl) = eliminate_regs (DECL_RTL (decl), 0, NULL_RTX);
! 684: #ifdef LEAF_REG_REMAP
! 685: if (leaf_function)
! 686: leaf_renumber_regs_insn (DECL_RTL (decl));
! 687: #endif
! 688: value = DECL_RTL (decl);
1.1 root 689:
690: /* Don't mention a variable at all
691: if it was completely optimized into nothingness.
692:
693: If DECL was from an inline function, then its rtl
694: is not identically the rtl that was used in this
695: particular compilation. */
696: if (GET_CODE (value) == REG)
697: {
698: regno = REGNO (DECL_RTL (decl));
699: if (regno >= FIRST_PSEUDO_REGISTER)
700: return;
701: }
1.1.1.4 ! root 702: else if (GET_CODE (value) == SUBREG)
1.1 root 703: {
704: int offset = 0;
705: while (GET_CODE (value) == SUBREG)
706: {
707: offset += SUBREG_WORD (value);
708: value = SUBREG_REG (value);
709: }
710: if (GET_CODE (value) == REG)
711: {
712: regno = REGNO (value);
713: if (regno >= FIRST_PSEUDO_REGISTER)
1.1.1.4 ! root 714: return;
! 715: regno += offset;
1.1 root 716: }
1.1.1.4 ! root 717: alter_subreg (DECL_RTL (decl));
! 718: value = DECL_RTL (decl);
1.1 root 719: }
720:
721: /* Emit any structure, union, or enum type that has not been output.
722: This occurs for tag-less structs (et al) used to declare variables
723: within functions. */
724: if (TREE_CODE (type) == ENUMERAL_TYPE
725: || TREE_CODE (type) == RECORD_TYPE
726: || TREE_CODE (type) == UNION_TYPE)
727: {
728: if (TYPE_SIZE (type) != 0 /* not a forward reference */
729: && KNOWN_TYPE_TAG (type) == 0) /* not yet declared */
730: sdbout_one_type (type);
731: }
732:
733: /* Defer SDB information for top-level initialized variables! */
734: if (! local
735: && GET_CODE (value) == MEM
736: && DECL_INITIAL (decl))
737: return;
738:
1.1.1.4 ! root 739: /* C++ in 2.3 makes nameless symbols. That will be fixed later.
! 740: For now, avoid crashing. */
! 741: if (DECL_NAME (decl) == NULL_TREE)
! 742: return;
! 743:
1.1 root 744: /* Record the name for, starting a symtab entry. */
745: name = IDENTIFIER_POINTER (DECL_NAME (decl));
746:
747: if (GET_CODE (value) == MEM
748: && GET_CODE (XEXP (value, 0)) == SYMBOL_REF)
749: {
750: PUT_SDB_DEF (name);
751: if (TREE_PUBLIC (decl))
752: {
753: PUT_SDB_VAL (XEXP (value, 0));
754: PUT_SDB_SCL (C_EXT);
755: }
756: else
757: {
758: PUT_SDB_VAL (XEXP (value, 0));
759: PUT_SDB_SCL (C_STAT);
760: }
761: }
762: else if (regno >= 0)
763: {
764: PUT_SDB_DEF (name);
765: PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (regno));
766: PUT_SDB_SCL (C_REG);
767: }
768: else if (GET_CODE (value) == MEM
769: && (GET_CODE (XEXP (value, 0)) == MEM
770: || (GET_CODE (XEXP (value, 0)) == REG
771: && REGNO (XEXP (value, 0)) != FRAME_POINTER_REGNUM
772: && REGNO (XEXP (value, 0)) != STACK_POINTER_REGNUM)))
773: /* If the value is indirect by memory or by a register
774: that isn't the frame pointer
775: then it means the object is variable-sized and address through
776: that register or stack slot. COFF has no way to represent this
777: so all we can do is output the variable as a pointer. */
778: {
779: PUT_SDB_DEF (name);
780: if (GET_CODE (XEXP (value, 0)) == REG)
781: {
782: PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (REGNO (XEXP (value, 0))));
783: PUT_SDB_SCL (C_REG);
784: }
785: else
786: {
787: /* DECL_RTL looks like (MEM (MEM (PLUS (REG...)
788: (CONST_INT...)))).
789: We want the value of that CONST_INT. */
790: /* Encore compiler hates a newline in a macro arg, it seems. */
791: PUT_SDB_INT_VAL (DEBUGGER_AUTO_OFFSET
792: (XEXP (XEXP (value, 0), 0)));
793: PUT_SDB_SCL (C_AUTO);
794: }
795:
796: type = build_pointer_type (TREE_TYPE (decl));
797: }
798: else if (GET_CODE (value) == MEM
799: && GET_CODE (XEXP (value, 0)) == PLUS
800: && GET_CODE (XEXP (XEXP (value, 0), 0)) == REG
801: && GET_CODE (XEXP (XEXP (value, 0), 1)) == CONST_INT)
802: {
803: /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))).
804: We want the value of that CONST_INT. */
805: PUT_SDB_DEF (name);
806: PUT_SDB_INT_VAL (DEBUGGER_AUTO_OFFSET (XEXP (value, 0)));
807: PUT_SDB_SCL (C_AUTO);
808: }
1.1.1.2 root 809: else if (GET_CODE (value) == MEM && GET_CODE (XEXP (value, 0)) == CONST)
810: {
811: /* Handle an obscure case which can arise when optimizing and
812: when there are few available registers. (This is *always*
813: the case for i386/i486 targets). The DECL_RTL looks like
814: (MEM (CONST ...)) even though this variable is a local `auto'
815: or a local `register' variable. In effect, what has happened
816: is that the reload pass has seen that all assignments and
817: references for one such a local variable can be replaced by
818: equivalent assignments and references to some static storage
819: variable, thereby avoiding the need for a register. In such
820: cases we're forced to lie to debuggers and tell them that
821: this variable was itself `static'. */
822: PUT_SDB_DEF (name);
823: PUT_SDB_VAL (XEXP (XEXP (value, 0), 0));
824: PUT_SDB_SCL (C_STAT);
825: }
1.1 root 826: else
827: {
828: /* It is something we don't know how to represent for SDB. */
829: return;
830: }
831: break;
832: }
833: PUT_SDB_TYPE (plain_type (type));
834: PUT_SDB_ENDEF;
835: }
836:
837: /* Output SDB information for a top-level initialized variable
838: that has been delayed. */
839:
840: void
841: sdbout_toplevel_data (decl)
842: tree decl;
843: {
844: tree type = TREE_TYPE (decl);
845:
1.1.1.3 root 846: if (DECL_IGNORED_P (decl))
847: return;
848:
1.1 root 849: if (! (TREE_CODE (decl) == VAR_DECL
850: && GET_CODE (DECL_RTL (decl)) == MEM
851: && DECL_INITIAL (decl)))
852: abort ();
853:
854: PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl)));
855: PUT_SDB_VAL (XEXP (DECL_RTL (decl), 0));
856: if (TREE_PUBLIC (decl))
857: {
858: PUT_SDB_SCL (C_EXT);
859: }
860: else
861: {
862: PUT_SDB_SCL (C_STAT);
863: }
864: PUT_SDB_TYPE (plain_type (type));
865: PUT_SDB_ENDEF;
866: }
867:
868: #ifdef SDB_ALLOW_FORWARD_REFERENCES
869:
870: /* Machinery to record and output anonymous types. */
871:
872: static tree anonymous_types;
873:
874: static void
875: sdbout_queue_anonymous_type (type)
876: tree type;
877: {
878: anonymous_types = saveable_tree_cons (NULL_TREE, type, anonymous_types);
879: }
880:
881: static void
882: sdbout_dequeue_anonymous_types ()
883: {
884: register tree types, link;
885:
886: while (anonymous_types)
887: {
888: types = nreverse (anonymous_types);
889: anonymous_types = NULL_TREE;
890:
891: for (link = types; link; link = TREE_CHAIN (link))
892: {
893: register tree type = TREE_VALUE (link);
894:
1.1.1.2 root 895: if (type && ! TREE_ASM_WRITTEN (type))
1.1 root 896: sdbout_one_type (type);
897: }
898: }
899: }
900:
901: #endif
902:
903: /* Given a chain of ..._TYPE nodes, all of which have names,
904: output definitions of those names, as typedefs. */
905:
906: void
907: sdbout_types (types)
908: register tree types;
909: {
910: register tree link;
911:
912: for (link = types; link; link = TREE_CHAIN (link))
913: sdbout_one_type (link);
914:
915: #ifdef SDB_ALLOW_FORWARD_REFERENCES
916: sdbout_dequeue_anonymous_types ();
917: #endif
918: }
919:
920: static void
921: sdbout_type (type)
922: tree type;
923: {
924: register tree tem;
925: if (type == error_mark_node)
926: type = integer_type_node;
927: PUT_SDB_TYPE (plain_type (type));
928: }
929:
930: /* Output types of the fields of type TYPE, if they are structs.
931:
932: Formerly did not chase through pointer types, since that could be circular.
933: They must come before TYPE, since forward refs are not allowed.
934: Now [email protected] says to try them. */
935:
936: static void
937: sdbout_field_types (type)
938: tree type;
939: {
940: tree tail;
941: for (tail = TYPE_FIELDS (type); tail; tail = TREE_CHAIN (tail))
942: if (TREE_CODE (TREE_TYPE (tail)) == POINTER_TYPE)
943: sdbout_one_type (TREE_TYPE (TREE_TYPE (tail)));
944: else
945: sdbout_one_type (TREE_TYPE (tail));
946: }
947:
948: /* Use this to put out the top level defined record and union types
949: for later reference. If this is a struct with a name, then put that
950: name out. Other unnamed structs will have .xxfake labels generated so
951: that they may be referred to later.
952: The label will be stored in the KNOWN_TYPE_TAG slot of a type.
953: It may NOT be called recursively. */
954:
955: static void
956: sdbout_one_type (type)
957: tree type;
958: {
959: text_section ();
960:
961: switch (TREE_CODE (type))
962: {
963: case RECORD_TYPE:
964: case UNION_TYPE:
965: case ENUMERAL_TYPE:
966: type = TYPE_MAIN_VARIANT (type);
967: /* Don't output a type twice. */
968: if (TREE_ASM_WRITTEN (type))
969: /* James said test TREE_ASM_BEING_WRITTEN here. */
970: return;
971:
972: /* Output nothing if type is not yet defined. */
973: if (TYPE_SIZE (type) == 0)
974: return;
975:
976: TREE_ASM_WRITTEN (type) = 1;
977: #if 1
978: /* This is reputed to cause trouble with the following case,
1.1.1.4 ! root 979: but perhaps checking TYPE_SIZE above will fix it. */
1.1 root 980:
981: /* Here is a test case:
982:
983: struct foo {
984: struct badstr *bbb;
985: } forwardref;
986:
987: typedef struct intermediate {
988: int aaaa;
989: } intermediate_ref;
990:
991: typedef struct badstr {
992: int ccccc;
993: } badtype; */
994:
995: #if 0
996: TREE_ASM_BEING_WRITTEN (type) = 1;
997: #endif
998: /* This change, which ought to make better output,
999: used to make the COFF assembler unhappy.
1000: Changes involving KNOWN_TYPE_TAG may fix the problem. */
1001: /* Before really doing anything, output types we want to refer to. */
1002: /* Note that in version 1 the following two lines
1003: are not used if forward references are in use. */
1004: if (TREE_CODE (type) != ENUMERAL_TYPE)
1005: sdbout_field_types (type);
1006: #if 0
1007: TREE_ASM_WRITTEN (type) = 1;
1008: #endif
1009: #endif
1010:
1011: /* Output a structure type. */
1012: {
1013: int size = int_size_in_bytes (type);
1014: int member_scl;
1015: tree tem;
1016: int i, n_baseclasses = 0;
1017:
1018: /* Record the type tag, but not in its permanent place just yet. */
1019: sdbout_record_type_name (type);
1020:
1021: PUT_SDB_DEF (KNOWN_TYPE_TAG (type));
1022:
1023: switch (TREE_CODE (type))
1024: {
1025: case UNION_TYPE:
1026: PUT_SDB_SCL (C_UNTAG);
1027: PUT_SDB_TYPE (T_UNION);
1028: member_scl = C_MOU;
1029: break;
1030:
1031: case RECORD_TYPE:
1032: PUT_SDB_SCL (C_STRTAG);
1033: PUT_SDB_TYPE (T_STRUCT);
1034: member_scl = C_MOS;
1035: break;
1036:
1037: case ENUMERAL_TYPE:
1038: PUT_SDB_SCL (C_ENTAG);
1039: PUT_SDB_TYPE (T_ENUM);
1040: member_scl = C_MOE;
1041: break;
1042: }
1043:
1044: PUT_SDB_SIZE (size);
1045: PUT_SDB_ENDEF;
1046:
1047: /* Print out the base class information with fields
1048: named after the types they hold. */
1049: if (TYPE_BINFO (type)
1050: && TYPE_BINFO_BASETYPES (type))
1051: n_baseclasses = TREE_VEC_LENGTH (TYPE_BINFO_BASETYPES (type));
1052: for (i = 0; i < n_baseclasses; i++)
1053: {
1054: tree child = TREE_VEC_ELT (BINFO_BASETYPES (TYPE_BINFO (type)), i);
1055: tree child_type = BINFO_TYPE (child);
1056: tree child_type_name;
1057: if (TYPE_NAME (child_type) == 0)
1058: continue;
1059: if (TREE_CODE (TYPE_NAME (child_type)) == IDENTIFIER_NODE)
1060: child_type_name = TYPE_NAME (child_type);
1061: else if (TREE_CODE (TYPE_NAME (child_type)) == TYPE_DECL)
1062: child_type_name = DECL_NAME (TYPE_NAME (child_type));
1063: else
1064: continue;
1065:
1066: CONTIN;
1067: PUT_SDB_DEF (IDENTIFIER_POINTER (child_type_name));
1068: PUT_SDB_INT_VAL (TREE_INT_CST_LOW (BINFO_OFFSET (child)));
1069: PUT_SDB_SCL (member_scl);
1070: sdbout_type (BINFO_TYPE (child));
1071: PUT_SDB_ENDEF;
1072: }
1073:
1074: /* output the individual fields */
1075:
1076: if (TREE_CODE (type) == ENUMERAL_TYPE)
1077: for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem))
1078: {
1079: PUT_SDB_DEF (IDENTIFIER_POINTER (TREE_PURPOSE (tem)));
1080: PUT_SDB_INT_VAL (TREE_INT_CST_LOW (TREE_VALUE (tem)));
1081: PUT_SDB_SCL (C_MOE);
1082: PUT_SDB_TYPE (T_MOE);
1083: PUT_SDB_ENDEF;
1084: }
1085:
1086: else /* record or union type */
1087: for (tem = TYPE_FIELDS (type); tem; tem = TREE_CHAIN (tem))
1088: /* Output the name, type, position (in bits), size (in bits)
1089: of each field. */
1090:
1091: /* Omit here the nameless fields that are used to skip bits.
1092: Also omit fields with variable size or position.
1093: Also omit non FIELD_DECL nodes that GNU C++ may put here. */
1094: if (TREE_CODE (tem) == FIELD_DECL
1095: && DECL_NAME (tem) != 0
1096: && TREE_CODE (DECL_SIZE (tem)) == INTEGER_CST
1097: && TREE_CODE (DECL_FIELD_BITPOS (tem)) == INTEGER_CST)
1098: {
1099: CONTIN;
1100: PUT_SDB_DEF (IDENTIFIER_POINTER (DECL_NAME (tem)));
1101: if (DECL_BIT_FIELD_TYPE (tem))
1102: {
1103: PUT_SDB_INT_VAL (TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem)));
1104: PUT_SDB_SCL (C_FIELD);
1105: sdbout_type (DECL_BIT_FIELD_TYPE (tem));
1106: PUT_SDB_SIZE (TREE_INT_CST_LOW (DECL_SIZE (tem)));
1107: }
1108: else
1109: {
1110: PUT_SDB_INT_VAL (TREE_INT_CST_LOW (DECL_FIELD_BITPOS (tem))
1111: / BITS_PER_UNIT);
1112: PUT_SDB_SCL (member_scl);
1113: sdbout_type (TREE_TYPE (tem));
1114: }
1115: PUT_SDB_ENDEF;
1116: }
1117: /* output end of a structure,union, or enumeral definition */
1118:
1119: PUT_SDB_PLAIN_DEF ("eos");
1120: PUT_SDB_INT_VAL (size);
1121: PUT_SDB_SCL (C_EOS);
1122: PUT_SDB_TAG (KNOWN_TYPE_TAG (type));
1123: PUT_SDB_SIZE (size);
1124: PUT_SDB_ENDEF;
1125: break;
1126: }
1127: }
1128: }
1129:
1130: /* The following two functions output definitions of function parameters.
1131: Each parameter gets a definition locating it in the parameter list.
1132: Each parameter that is a register variable gets a second definition
1133: locating it in the register.
1134:
1135: Printing or argument lists in gdb uses the definitions that
1136: locate in the parameter list. But reference to the variable in
1137: expressions uses preferentially the definition as a register. */
1138:
1139: /* Output definitions, referring to storage in the parmlist,
1140: of all the parms in PARMS, which is a chain of PARM_DECL nodes. */
1141:
1142: static void
1143: sdbout_parms (parms)
1144: tree parms;
1145: {
1146: for (; parms; parms = TREE_CHAIN (parms))
1147: if (DECL_NAME (parms))
1148: {
1149: int current_sym_value = 0;
1150: char *name = IDENTIFIER_POINTER (DECL_NAME (parms));
1151:
1152: if (name == 0 || *name == 0)
1153: name = gen_fake_label ();
1154:
1155: /* Perform any necessary register eliminations on the parameter's rtl,
1156: so that the debugging output will be accurate. */
1157: DECL_INCOMING_RTL (parms) =
1.1.1.4 ! root 1158: eliminate_regs (DECL_INCOMING_RTL (parms), 0, NULL_RTX);
! 1159: DECL_RTL (parms) = eliminate_regs (DECL_RTL (parms), 0, NULL_RTX);
1.1 root 1160:
1161: if (PARM_PASSED_IN_MEMORY (parms))
1162: {
1163: rtx addr = XEXP (DECL_INCOMING_RTL (parms), 0);
1164: tree type;
1165:
1166: /* ??? Here we assume that the parm address is indexed
1167: off the frame pointer or arg pointer.
1168: If that is not true, we produce meaningless results,
1169: but do not crash. */
1170: if (GET_CODE (addr) == PLUS
1171: && GET_CODE (XEXP (addr, 1)) == CONST_INT)
1172: current_sym_value = INTVAL (XEXP (addr, 1));
1173: else
1174: current_sym_value = 0;
1175:
1176: if (GET_CODE (DECL_RTL (parms)) == REG
1177: && REGNO (DECL_RTL (parms)) >= 0
1178: && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
1179: type = DECL_ARG_TYPE (parms);
1180: else
1181: {
1182: int original_sym_value = current_sym_value;
1183:
1184: /* This is the case where the parm is passed as an int or
1185: double and it is converted to a char, short or float
1186: and stored back in the parmlist. In this case, describe
1187: the parm with the variable's declared type, and adjust
1188: the address if the least significant bytes (which we are
1189: using) are not the first ones. */
1190: #if BYTES_BIG_ENDIAN
1191: if (TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
1192: current_sym_value +=
1193: (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
1194: - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
1195: #endif
1196: if (GET_CODE (DECL_RTL (parms)) == MEM
1197: && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
1198: && (GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1))
1199: == CONST_INT)
1200: && (INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1))
1201: == current_sym_value))
1202: type = TREE_TYPE (parms);
1203: else
1204: {
1205: current_sym_value = original_sym_value;
1206: type = DECL_ARG_TYPE (parms);
1207: }
1208: }
1209:
1210: PUT_SDB_DEF (name);
1211: PUT_SDB_INT_VAL (DEBUGGER_ARG_OFFSET (current_sym_value, addr));
1212: PUT_SDB_SCL (C_ARG);
1213: PUT_SDB_TYPE (plain_type (type));
1214: PUT_SDB_ENDEF;
1215: }
1216: else if (GET_CODE (DECL_RTL (parms)) == REG)
1217: {
1218: rtx best_rtl;
1219: /* Parm passed in registers and lives in registers or nowhere. */
1220:
1221: /* If parm lives in a register, use that register;
1222: pretend the parm was passed there. It would be more consistent
1223: to describe the register where the parm was passed,
1224: but in practice that register usually holds something else. */
1225: if (REGNO (DECL_RTL (parms)) >= 0
1226: && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER)
1227: best_rtl = DECL_RTL (parms);
1228: /* If the parm lives nowhere,
1229: use the register where it was passed. */
1230: else
1231: best_rtl = DECL_INCOMING_RTL (parms);
1232:
1233: PUT_SDB_DEF (name);
1234: PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (REGNO (best_rtl)));
1235: PUT_SDB_SCL (C_REGPARM);
1236: PUT_SDB_TYPE (plain_type (TREE_TYPE (parms), 0));
1237: PUT_SDB_ENDEF;
1238: }
1239: else if (GET_CODE (DECL_RTL (parms)) == MEM
1240: && XEXP (DECL_RTL (parms), 0) != const0_rtx)
1241: {
1242: /* Parm was passed in registers but lives on the stack. */
1243:
1244: /* DECL_RTL looks like (MEM (PLUS (REG...) (CONST_INT...))),
1245: in which case we want the value of that CONST_INT,
1246: or (MEM (REG ...)) or (MEM (MEM ...)),
1247: in which case we use a value of zero. */
1248: if (GET_CODE (XEXP (DECL_RTL (parms), 0)) == REG
1249: || GET_CODE (XEXP (DECL_RTL (parms), 0)) == MEM)
1250: current_sym_value = 0;
1251: else
1252: current_sym_value = INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1));
1253:
1254: /* Again, this assumes the offset is based on the arg pointer. */
1255: PUT_SDB_DEF (name);
1256: PUT_SDB_INT_VAL (DEBUGGER_ARG_OFFSET (current_sym_value,
1257: XEXP (DECL_RTL (parms), 0)));
1258: PUT_SDB_SCL (C_ARG);
1259: PUT_SDB_TYPE (plain_type (TREE_TYPE (parms), 0));
1260: PUT_SDB_ENDEF;
1261: }
1262: }
1263: }
1264:
1265: /* Output definitions for the places where parms live during the function,
1266: when different from where they were passed, when the parms were passed
1267: in memory.
1268:
1269: It is not useful to do this for parms passed in registers
1270: that live during the function in different registers, because it is
1271: impossible to look in the passed register for the passed value,
1272: so we use the within-the-function register to begin with.
1273:
1274: PARMS is a chain of PARM_DECL nodes. */
1275:
1276: static void
1277: sdbout_reg_parms (parms)
1278: tree parms;
1279: {
1280: for (; parms; parms = TREE_CHAIN (parms))
1281: if (DECL_NAME (parms))
1282: {
1283: char *name = IDENTIFIER_POINTER (DECL_NAME (parms));
1284:
1285: /* Report parms that live in registers during the function
1286: but were passed in memory. */
1287: if (GET_CODE (DECL_RTL (parms)) == REG
1288: && REGNO (DECL_RTL (parms)) >= 0
1289: && REGNO (DECL_RTL (parms)) < FIRST_PSEUDO_REGISTER
1290: && PARM_PASSED_IN_MEMORY (parms))
1291: {
1292: if (name == 0 || *name == 0)
1293: name = gen_fake_label ();
1294: PUT_SDB_DEF (name);
1295: PUT_SDB_INT_VAL (DBX_REGISTER_NUMBER (REGNO (DECL_RTL (parms))));
1296: PUT_SDB_SCL (C_REG);
1297: PUT_SDB_TYPE (plain_type (TREE_TYPE (parms), 0));
1298: PUT_SDB_ENDEF;
1299: }
1300: /* Report parms that live in memory but not where they were passed. */
1301: else if (GET_CODE (DECL_RTL (parms)) == MEM
1302: && GET_CODE (XEXP (DECL_RTL (parms), 0)) == PLUS
1303: && GET_CODE (XEXP (XEXP (DECL_RTL (parms), 0), 1)) == CONST_INT
1304: && PARM_PASSED_IN_MEMORY (parms)
1305: && ! rtx_equal_p (DECL_RTL (parms), DECL_INCOMING_RTL (parms)))
1306: {
1307: #if 0 /* ??? It is not clear yet what should replace this. */
1308: int offset = DECL_OFFSET (parms) / BITS_PER_UNIT;
1309: /* A parm declared char is really passed as an int,
1310: so it occupies the least significant bytes.
1311: On a big-endian machine those are not the low-numbered ones. */
1312: #if BYTES_BIG_ENDIAN
1313: if (offset != -1 && TREE_TYPE (parms) != DECL_ARG_TYPE (parms))
1314: offset += (GET_MODE_SIZE (TYPE_MODE (DECL_ARG_TYPE (parms)))
1315: - GET_MODE_SIZE (GET_MODE (DECL_RTL (parms))));
1316: #endif
1317: if (INTVAL (XEXP (XEXP (DECL_RTL (parms), 0), 1)) != offset) {...}
1318: #endif
1319: {
1320: if (name == 0 || *name == 0)
1321: name = gen_fake_label ();
1322: PUT_SDB_DEF (name);
1323: PUT_SDB_INT_VAL (DEBUGGER_AUTO_OFFSET
1324: (XEXP (DECL_RTL (parms), 0)));
1325: PUT_SDB_SCL (C_AUTO);
1326: PUT_SDB_TYPE (plain_type (TREE_TYPE (parms)));
1327: PUT_SDB_ENDEF;
1328: }
1329: }
1330: }
1331: }
1332:
1333: /* Describe the beginning of an internal block within a function.
1334: Also output descriptions of variables defined in this block.
1335:
1336: N is the number of the block, by order of beginning, counting from 1,
1337: and not counting the outermost (function top-level) block.
1338: The blocks match the BLOCKs in DECL_INITIAL (current_function_decl),
1339: if the count starts at 0 for the outermost one. */
1340:
1341: void
1342: sdbout_begin_block (file, line, n)
1343: FILE *file;
1344: int line;
1345: int n;
1346: {
1347: tree decl = current_function_decl;
1348: MAKE_LINE_SAFE (line);
1349: PUT_SDB_BLOCK_START (line - sdb_begin_function_line);
1350: if (n == 1)
1351: {
1352: /* Include the outermost BLOCK's variables in block 1. */
1353: next_block_number = 0;
1354: do_block = 0;
1355: sdbout_block (DECL_INITIAL (decl));
1356: }
1357: /* If -g1, suppress all the internal symbols of functions
1358: except for arguments. */
1359: if (debug_info_level != DINFO_LEVEL_TERSE)
1360: {
1361: next_block_number = 0;
1362: do_block = n;
1363: sdbout_block (DECL_INITIAL (decl));
1364: }
1365:
1366: #ifdef SDB_ALLOW_FORWARD_REFERENCES
1367: sdbout_dequeue_anonymous_types ();
1368: #endif
1369: }
1370:
1371: /* Describe the end line-number of an internal block within a function. */
1372:
1373: void
1374: sdbout_end_block (file, line)
1375: FILE *file;
1376: int line;
1377: {
1378: MAKE_LINE_SAFE (line);
1379: PUT_SDB_BLOCK_END (line - sdb_begin_function_line);
1380: }
1381:
1382: /* Output sdb info for the current function name.
1383: Called from assemble_start_function. */
1384:
1385: void
1386: sdbout_mark_begin_function ()
1387: {
1388: sdbout_symbol (current_function_decl, 0);
1389: }
1390:
1391: /* Called at beginning of function body (after prologue).
1392: Record the function's starting line number, so we can output
1393: relative line numbers for the other lines.
1394: Describe beginning of outermost block.
1395: Also describe the parameter list. */
1396:
1397: void
1398: sdbout_begin_function (line)
1399: int line;
1400: {
1401: sdb_begin_function_line = line - 1;
1402: PUT_SDB_FUNCTION_START (line);
1403: sdbout_parms (DECL_ARGUMENTS (current_function_decl));
1404: sdbout_reg_parms (DECL_ARGUMENTS (current_function_decl));
1405: }
1406:
1407: /* Called at end of function (before epilogue).
1408: Describe end of outermost block. */
1409:
1410: void
1411: sdbout_end_function (line)
1412: int line;
1413: {
1414: #ifdef SDB_ALLOW_FORWARD_REFERENCES
1415: sdbout_dequeue_anonymous_types ();
1416: #endif
1417:
1418: MAKE_LINE_SAFE (line);
1419: PUT_SDB_FUNCTION_END (line - sdb_begin_function_line);
1420:
1421: /* Indicate we are between functions, for line-number output. */
1422: sdb_begin_function_line = -1;
1423: }
1424:
1425: /* Output sdb info for the absolute end of a function.
1426: Called after the epilogue is output. */
1427:
1428: void
1429: sdbout_end_epilogue ()
1430: {
1431: char *name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (current_function_decl));
1432: PUT_SDB_EPILOGUE_END (name);
1433: }
1434:
1435: /* Output sdb info for the given label. Called only if LABEL_NAME (insn)
1436: is present. */
1437:
1438: void
1439: sdbout_label (insn)
1440: register rtx insn;
1441: {
1442: PUT_SDB_DEF (LABEL_NAME (insn));
1443: PUT_SDB_VAL (insn);
1444: PUT_SDB_SCL (C_LABEL);
1445: PUT_SDB_TYPE (T_NULL);
1446: PUT_SDB_ENDEF;
1447: }
1448:
1449: #endif /* SDB_DEBUGGING_INFO */
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