1 /* Output xcoff-format symbol table information from GNU compiler.
2 Copyright (C) 1992, 1994, 1995, 1997 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
22 /* Output xcoff-format symbol table data. The main functionality is contained
23 in dbxout.c. This file implements the sdbout-like parts of the xcoff
24 interface. Many functions are very similar to their counterparts in
33 #ifdef XCOFF_DEBUGGING_INFO
35 /* This defines the C_* storage classes. */
36 #include <dbxstclass.h>
40 #if defined (USG) || defined (NO_STAB_H)
45 /* This is a GNU extension we need to reference in this file. */
51 /* Line number of beginning of current function, minus one.
52 Negative means not in a function or not using xcoff. */
54 static int xcoff_begin_function_line
= -1;
55 static int xcoff_inlining
= 0;
57 /* Name of the current include file. */
59 char *xcoff_current_include_file
;
61 /* Name of the current function file. This is the file the `.bf' is
62 emitted from. In case a line is emitted from a different file,
63 (by including that file of course), then the line number will be
66 static char *xcoff_current_function_file
;
68 /* Names of bss and data sections. These should be unique names for each
71 char *xcoff_bss_section_name
;
72 char *xcoff_private_data_section_name
;
73 char *xcoff_read_only_section_name
;
75 /* Last source file name mentioned in a NOTE insn. */
79 /* Macro definitions used below. */
81 #define ABS_OR_RELATIVE_LINENO(LINENO) \
82 ((xcoff_inlining) ? (LINENO) : (LINENO) - xcoff_begin_function_line)
84 /* Output source line numbers via ".line" rather than ".stabd". */
85 #define ASM_OUTPUT_SOURCE_LINE(FILE,LINENUM) \
87 if (xcoff_begin_function_line >= 0) \
88 fprintf (FILE, "\t.line\t%d\n", ABS_OR_RELATIVE_LINENO (LINENUM)); \
91 #define ASM_OUTPUT_LFB(FILE,LINENUM) \
93 if (xcoff_begin_function_line == -1) \
95 xcoff_begin_function_line = (LINENUM) - 1;\
96 fprintf (FILE, "\t.bf\t%d\n", (LINENUM)); \
98 xcoff_current_function_file \
99 = (xcoff_current_include_file \
100 ? xcoff_current_include_file : main_input_filename); \
103 #define ASM_OUTPUT_LFE(FILE,LINENUM) \
105 fprintf (FILE, "\t.ef\t%d\n", (LINENUM)); \
106 xcoff_begin_function_line = -1; \
109 #define ASM_OUTPUT_LBB(FILE,LINENUM,BLOCKNUM) \
110 fprintf (FILE, "\t.bb\t%d\n", ABS_OR_RELATIVE_LINENO (LINENUM))
112 #define ASM_OUTPUT_LBE(FILE,LINENUM,BLOCKNUM) \
113 fprintf (FILE, "\t.eb\t%d\n", ABS_OR_RELATIVE_LINENO (LINENUM))
115 static void assign_type_number
PROTO((tree
, char *, int));
116 static void xcoffout_block
PROTO((tree
, int, tree
));
118 /* Support routines for XCOFF debugging info. */
120 /* Assign NUMBER as the stabx type number for the type described by NAME.
121 Search all decls in the list SYMS to find the type NAME. */
124 assign_type_number (syms
, name
, number
)
131 for (decl
= syms
; decl
; decl
= TREE_CHAIN (decl
))
133 && strcmp (IDENTIFIER_POINTER (DECL_NAME (decl
)), name
) == 0)
135 TREE_ASM_WRITTEN (decl
) = 1;
136 TYPE_SYMTAB_ADDRESS (TREE_TYPE (decl
)) = number
;
140 /* Setup gcc primitive types to use the XCOFF built-in type numbers where
144 xcoff_output_standard_types (syms
)
147 /* Handle built-in C types here. */
149 assign_type_number (syms
, "int", -1);
150 assign_type_number (syms
, "char", -2);
151 assign_type_number (syms
, "short int", -3);
152 assign_type_number (syms
, "long int", (TARGET_64BIT
? -31 : -4));
153 assign_type_number (syms
, "unsigned char", -5);
154 assign_type_number (syms
, "signed char", -6);
155 assign_type_number (syms
, "short unsigned int", -7);
156 assign_type_number (syms
, "unsigned int", -8);
157 /* No such type "unsigned". */
158 assign_type_number (syms
, "long unsigned int", (TARGET_64BIT
? -32 : -10));
159 assign_type_number (syms
, "void", -11);
160 assign_type_number (syms
, "float", -12);
161 assign_type_number (syms
, "double", -13);
162 assign_type_number (syms
, "long double", -14);
163 /* Pascal and Fortran types run from -15 to -29. */
164 assign_type_number (syms
, "wchar", -30);
165 assign_type_number (syms
, "long long int", -31);
166 assign_type_number (syms
, "long long unsigned int", -32);
167 /* Additional Fortran types run from -33 to -37. */
169 /* ??? Should also handle built-in C++ and Obj-C types. There perhaps
170 aren't any that C doesn't already have. */
173 /* Print an error message for unrecognized stab codes. */
175 #define UNKNOWN_STAB(STR) \
177 fprintf(stderr, "Error, unknown stab %s: : 0x%x\n", STR, stab); \
181 /* Conversion routine from BSD stabs to AIX storage classes. */
184 stab_to_sclass (stab
)
193 UNKNOWN_STAB ("N_FNAME");
205 UNKNOWN_STAB ("N_MAIN");
213 UNKNOWN_STAB ("N_SSYM");
229 UNKNOWN_STAB ("N_SO");
233 UNKNOWN_STAB ("N_SOL");
237 UNKNOWN_STAB ("N_SLINE");
242 UNKNOWN_STAB ("N_DSLINE");
248 UNKNOWN_STAB ("N_BSLINE");
252 /* This has the same value as N_BSLINE. */
254 UNKNOWN_STAB ("N_BROWS");
260 UNKNOWN_STAB ("N_BINCL");
266 UNKNOWN_STAB ("N_EINCL");
272 UNKNOWN_STAB ("N_EXCL");
277 UNKNOWN_STAB ("N_LBRAC");
281 UNKNOWN_STAB ("N_RBRAC");
292 UNKNOWN_STAB ("N_LENG");
296 UNKNOWN_STAB ("N_PC");
301 UNKNOWN_STAB ("N_M2C");
307 UNKNOWN_STAB ("N_SCOPE");
312 UNKNOWN_STAB ("N_CATCH");
316 UNKNOWN_STAB ("default");
321 /* Output debugging info to FILE to switch to sourcefile FILENAME.
322 INLINE_P is true if this is from an inlined function. */
325 xcoffout_source_file (file
, filename
, inline_p
)
331 && (xcoff_lastfile
== 0 || strcmp (filename
, xcoff_lastfile
)
332 || (inline_p
&& ! xcoff_inlining
)
333 || (! inline_p
&& xcoff_inlining
)))
335 if (xcoff_current_include_file
)
337 fprintf (file
, "\t.ei\t");
338 output_quoted_string (file
, xcoff_current_include_file
);
339 fprintf (file
, "\n");
340 xcoff_current_include_file
= NULL
;
342 xcoff_inlining
=inline_p
;
343 if (strcmp (main_input_filename
, filename
) || inline_p
)
345 fprintf (file
, "\t.bi\t");
346 output_quoted_string (file
, filename
);
347 fprintf (file
, "\n");
348 xcoff_current_include_file
= filename
;
351 xcoff_lastfile
= filename
;
355 /* Output a line number symbol entry into output stream FILE,
356 for source file FILENAME and line number NOTE. */
359 xcoffout_source_line (file
, filename
, note
)
364 xcoffout_source_file (file
, filename
, RTX_INTEGRATED_P (note
));
366 ASM_OUTPUT_SOURCE_LINE (file
, NOTE_LINE_NUMBER (note
));
369 /* Output the symbols defined in block number DO_BLOCK.
370 Set NEXT_BLOCK_NUMBER to 0 before calling.
372 This function works by walking the tree structure of blocks,
373 counting blocks until it finds the desired block. */
375 static int do_block
= 0;
377 static int next_block_number
;
380 xcoffout_block (block
, depth
, args
)
387 /* Ignore blocks never expanded or otherwise marked as real. */
388 if (TREE_USED (block
))
390 /* When we reach the specified block, output its symbols. */
391 if (next_block_number
== do_block
)
393 /* Output the syms of the block. */
394 if (debug_info_level
!= DINFO_LEVEL_TERSE
|| depth
== 0)
395 dbxout_syms (BLOCK_VARS (block
));
397 dbxout_reg_parms (args
);
399 /* We are now done with the block. Don't go to inner blocks. */
402 /* If we are past the specified block, stop the scan. */
403 else if (next_block_number
>= do_block
)
408 /* Output the subblocks. */
409 xcoffout_block (BLOCK_SUBBLOCKS (block
), depth
+ 1, NULL_TREE
);
411 block
= BLOCK_CHAIN (block
);
415 /* Describe the beginning of an internal block within a function.
416 Also output descriptions of variables defined in this block.
418 N is the number of the block, by order of beginning, counting from 1,
419 and not counting the outermost (function top-level) block.
420 The blocks match the BLOCKs in DECL_INITIAL (current_function_decl),
421 if the count starts at 0 for the outermost one. */
424 xcoffout_begin_block (file
, line
, n
)
429 tree decl
= current_function_decl
;
432 /* The IBM AIX compiler does not emit a .bb for the function level scope,
433 so we avoid it here also. */
435 ASM_OUTPUT_LBB (file
, line
, n
);
438 next_block_number
= 0;
439 xcoffout_block (DECL_INITIAL (decl
), 0, DECL_ARGUMENTS (decl
));
442 /* Describe the end line-number of an internal block within a function. */
445 xcoffout_end_block (file
, line
, n
)
451 ASM_OUTPUT_LBE (file
, line
, n
);
454 /* Called at beginning of function (before prologue).
455 Declare function as needed for debugging. */
458 xcoffout_declare_function (file
, decl
, name
)
469 for (i
= 0; name
[i
]; ++i
)
473 n
= (char *) alloca (i
+ 1);
474 strncpy (n
, name
, i
);
480 /* Any pending .bi or .ei must occur before the .function pseudo op.
481 Otherwise debuggers will think that the function is in the previous
482 file and/or at the wrong line number. */
483 xcoffout_source_file (file
, DECL_SOURCE_FILE (decl
), 0);
484 dbxout_symbol (decl
, 0);
485 fprintf (file
, "\t.function .%s,.%s,16,044,FE..%s-.%s\n", n
, n
, n
, n
);
488 /* Called at beginning of function body (after prologue).
489 Record the function's starting line number, so we can output
490 relative line numbers for the other lines.
491 Record the file name that this function is contained in. */
494 xcoffout_begin_function (file
, last_linenum
)
498 ASM_OUTPUT_LFB (file
, last_linenum
);
499 dbxout_parms (DECL_ARGUMENTS (current_function_decl
));
500 ASM_OUTPUT_SOURCE_LINE (file
, last_linenum
);
503 /* Called at end of function (before epilogue).
504 Describe end of outermost block. */
507 xcoffout_end_function (file
, last_linenum
)
511 ASM_OUTPUT_LFE (file
, last_linenum
);
514 /* Output xcoff info for the absolute end of a function.
515 Called after the epilogue is output. */
518 xcoffout_end_epilogue (file
)
521 /* We need to pass the correct function size to .function, otherwise,
522 the xas assembler can't figure out the correct size for the function
523 aux entry. So, we emit a label after the last instruction which can
524 be used by the .function pseudo op to calculate the function size. */
526 char *fname
= XSTR (XEXP (DECL_RTL (current_function_decl
), 0), 0);
529 fprintf (file
, "FE..");
530 ASM_OUTPUT_LABEL (file
, fname
);
532 #endif /* XCOFF_DEBUGGING_INFO */