1 /* Output xcoff-format symbol table information from GNU compiler.
2 Copyright (C) 1992, 1994, 1995 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 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
27 /* Include this first, because it may define MIN and MAX. */
35 #ifdef XCOFF_DEBUGGING_INFO
37 /* This defines the C_* storage classes. */
38 #include <dbxstclass.h>
42 #if defined (USG) || defined (NO_STAB_H)
47 /* This is a GNU extension we need to reference in this file. */
53 /* Line number of beginning of current function, minus one.
54 Negative means not in a function or not using xcoff. */
56 int xcoff_begin_function_line
= -1;
57 int xcoff_inlining
= 0;
59 /* Name of the current include file. */
61 char *xcoff_current_include_file
;
63 /* Name of the current function file. This is the file the `.bf' is
64 emitted from. In case a line is emitted from a different file,
65 (by including that file of course), then the line number will be
68 char *xcoff_current_function_file
;
70 /* Names of bss and data sections. These should be unique names for each
73 char *xcoff_bss_section_name
;
74 char *xcoff_private_data_section_name
;
75 char *xcoff_read_only_section_name
;
77 /* Last source file name mentioned in a NOTE insn. */
81 /* Macro definitions used below. */
83 #define ABS_OR_RELATIVE_LINENO(LINENO) \
84 ((xcoff_inlining) ? (LINENO) : (LINENO) - xcoff_begin_function_line)
86 /* Output source line numbers via ".line" rather than ".stabd". */
87 #define ASM_OUTPUT_SOURCE_LINE(FILE,LINENUM) \
89 if (xcoff_begin_function_line >= 0) \
90 fprintf (FILE, "\t.line\t%d\n", ABS_OR_RELATIVE_LINENO (LINENUM)); \
93 #define ASM_OUTPUT_LFB(FILE,LINENUM) \
95 if (xcoff_begin_function_line == -1) \
97 xcoff_begin_function_line = (LINENUM) - 1;\
98 fprintf (FILE, "\t.bf\t%d\n", (LINENUM)); \
100 xcoff_current_function_file \
101 = (xcoff_current_include_file \
102 ? xcoff_current_include_file : main_input_filename); \
105 #define ASM_OUTPUT_LFE(FILE,LINENUM) \
107 fprintf (FILE, "\t.ef\t%d\n", (LINENUM)); \
108 xcoff_begin_function_line = -1; \
111 #define ASM_OUTPUT_LBB(FILE,LINENUM,BLOCKNUM) \
112 fprintf (FILE, "\t.bb\t%d\n", ABS_OR_RELATIVE_LINENO (LINENUM))
114 #define ASM_OUTPUT_LBE(FILE,LINENUM,BLOCKNUM) \
115 fprintf (FILE, "\t.eb\t%d\n", ABS_OR_RELATIVE_LINENO (LINENUM))
117 /* Support routines for XCOFF debugging info. */
119 /* Assign NUMBER as the stabx type number for the type described by NAME.
120 Search all decls in the list SYMS to find the type NAME. */
123 assign_type_number (syms
, name
, number
)
130 for (decl
= syms
; decl
; decl
= TREE_CHAIN (decl
))
132 && strcmp (IDENTIFIER_POINTER (DECL_NAME (decl
)), name
) == 0)
134 TREE_ASM_WRITTEN (decl
) = 1;
135 TYPE_SYMTAB_ADDRESS (TREE_TYPE (decl
)) = number
;
139 /* Setup gcc primitive types to use the XCOFF built-in type numbers where
143 xcoff_output_standard_types (syms
)
146 /* Handle built-in C types here. */
148 assign_type_number (syms
, "int", (TARGET_64BIT
? -31 : -1));
149 assign_type_number (syms
, "char", -2);
150 assign_type_number (syms
, "short int", -3);
151 assign_type_number (syms
, "long int", (TARGET_64BIT
? -31 : -4));
152 assign_type_number (syms
, "unsigned char", -5);
153 assign_type_number (syms
, "signed char", -6);
154 assign_type_number (syms
, "short unsigned int", -7);
155 assign_type_number (syms
, "unsigned int", (TARGET_64BIT
? -32 : -8));
156 /* No such type "unsigned". */
157 assign_type_number (syms
, "long unsigned int", (TARGET_64BIT
? -32 : -10));
158 assign_type_number (syms
, "void", -11);
159 assign_type_number (syms
, "float", -12);
160 assign_type_number (syms
, "double", -13);
161 assign_type_number (syms
, "long double", -14);
162 /* Pascal and Fortran types run from -15 to -29. */
163 assign_type_number (syms
, "wchar", -30);
164 assign_type_number (syms
, "long long int", -31);
165 assign_type_number (syms
, "long long unsigned int", -32);
166 /* Additional Fortran types run from -33 to -37. */
168 /* ??? Should also handle built-in C++ and Obj-C types. There perhaps
169 aren't any that C doesn't already have. */
172 /* Print an error message for unrecognized stab codes. */
174 #define UNKNOWN_STAB(STR) \
176 fprintf(stderr, "Error, unknown stab %s: : 0x%x\n", STR, stab); \
180 /* Conversion routine from BSD stabs to AIX storage classes. */
183 stab_to_sclass (stab
)
192 UNKNOWN_STAB ("N_FNAME");
204 UNKNOWN_STAB ("N_MAIN");
212 UNKNOWN_STAB ("N_SSYM");
228 UNKNOWN_STAB ("N_SO");
232 UNKNOWN_STAB ("N_SOL");
236 UNKNOWN_STAB ("N_SLINE");
241 UNKNOWN_STAB ("N_DSLINE");
247 UNKNOWN_STAB ("N_BSLINE");
251 /* This has the same value as N_BSLINE. */
253 UNKNOWN_STAB ("N_BROWS");
259 UNKNOWN_STAB ("N_BINCL");
265 UNKNOWN_STAB ("N_EINCL");
271 UNKNOWN_STAB ("N_EXCL");
276 UNKNOWN_STAB ("N_LBRAC");
280 UNKNOWN_STAB ("N_RBRAC");
291 UNKNOWN_STAB ("N_LENG");
295 UNKNOWN_STAB ("N_PC");
300 UNKNOWN_STAB ("N_M2C");
306 UNKNOWN_STAB ("N_SCOPE");
311 UNKNOWN_STAB ("N_CATCH");
315 UNKNOWN_STAB ("default");
320 /* Output debugging info to FILE to switch to sourcefile FILENAME.
321 INLINE_P is true if this is from an inlined function. */
324 xcoffout_source_file (file
, filename
, inline_p
)
330 && (xcoff_lastfile
== 0 || strcmp (filename
, xcoff_lastfile
)
331 || (inline_p
&& ! xcoff_inlining
)
332 || (! inline_p
&& xcoff_inlining
)))
334 if (xcoff_current_include_file
)
336 fprintf (file
, "\t.ei\t");
337 output_quoted_string (file
, xcoff_current_include_file
);
338 fprintf (file
, "\n");
339 xcoff_current_include_file
= NULL
;
341 xcoff_inlining
=inline_p
;
342 if (strcmp (main_input_filename
, filename
) || inline_p
)
344 fprintf (file
, "\t.bi\t");
345 output_quoted_string (file
, filename
);
346 fprintf (file
, "\n");
347 xcoff_current_include_file
= filename
;
350 xcoff_lastfile
= filename
;
354 /* Output a line number symbol entry into output stream FILE,
355 for source file FILENAME and line number NOTE. */
358 xcoffout_source_line (file
, filename
, note
)
363 xcoffout_source_file (file
, filename
, RTX_INTEGRATED_P (note
));
365 ASM_OUTPUT_SOURCE_LINE (file
, NOTE_LINE_NUMBER (note
));
368 /* Output the symbols defined in block number DO_BLOCK.
369 Set NEXT_BLOCK_NUMBER to 0 before calling.
371 This function works by walking the tree structure of blocks,
372 counting blocks until it finds the desired block. */
374 static int do_block
= 0;
376 static int next_block_number
;
379 xcoffout_block (block
, depth
, args
)
386 /* Ignore blocks never expanded or otherwise marked as real. */
387 if (TREE_USED (block
))
389 /* When we reach the specified block, output its symbols. */
390 if (next_block_number
== do_block
)
392 /* Output the syms of the block. */
393 if (debug_info_level
!= DINFO_LEVEL_TERSE
|| depth
== 0)
394 dbxout_syms (BLOCK_VARS (block
));
396 dbxout_reg_parms (args
);
398 /* We are now done with the block. Don't go to inner blocks. */
401 /* If we are past the specified block, stop the scan. */
402 else if (next_block_number
>= do_block
)
407 /* Output the subblocks. */
408 xcoffout_block (BLOCK_SUBBLOCKS (block
), depth
+ 1, NULL_TREE
);
410 block
= BLOCK_CHAIN (block
);
414 /* Describe the beginning of an internal block within a function.
415 Also output descriptions of variables defined in this block.
417 N is the number of the block, by order of beginning, counting from 1,
418 and not counting the outermost (function top-level) block.
419 The blocks match the BLOCKs in DECL_INITIAL (current_function_decl),
420 if the count starts at 0 for the outermost one. */
423 xcoffout_begin_block (file
, line
, n
)
428 tree decl
= current_function_decl
;
431 /* The IBM AIX compiler does not emit a .bb for the function level scope,
432 so we avoid it here also. */
434 ASM_OUTPUT_LBB (file
, line
, n
);
437 next_block_number
= 0;
438 xcoffout_block (DECL_INITIAL (decl
), 0, DECL_ARGUMENTS (decl
));
441 /* Describe the end line-number of an internal block within a function. */
444 xcoffout_end_block (file
, line
, n
)
450 ASM_OUTPUT_LBE (file
, line
, n
);
453 /* Called at beginning of function (before prologue).
454 Declare function as needed for debugging. */
457 xcoffout_declare_function (file
, decl
, name
)
468 for (i
= 0; name
[i
]; ++i
)
472 n
= (char *) alloca (i
+ 1);
473 strncpy (n
, name
, i
);
479 /* Any pending .bi or .ei must occur before the .function pseudo op.
480 Otherwise debuggers will think that the function is in the previous
481 file and/or at the wrong line number. */
482 xcoffout_source_file (file
, DECL_SOURCE_FILE (decl
), 0);
483 dbxout_symbol (decl
, 0);
484 fprintf (file
, "\t.function .%s,.%s,16,044,FE..%s-.%s\n", n
, n
, n
, n
);
487 /* Called at beginning of function body (after prologue).
488 Record the function's starting line number, so we can output
489 relative line numbers for the other lines.
490 Record the file name that this function is contained in. */
493 xcoffout_begin_function (file
, last_linenum
)
497 ASM_OUTPUT_LFB (file
, last_linenum
);
498 dbxout_parms (DECL_ARGUMENTS (current_function_decl
));
499 ASM_OUTPUT_SOURCE_LINE (file
, last_linenum
);
502 /* Called at end of function (before epilogue).
503 Describe end of outermost block. */
506 xcoffout_end_function (file
, last_linenum
)
510 ASM_OUTPUT_LFE (file
, last_linenum
);
513 /* Output xcoff info for the absolute end of a function.
514 Called after the epilogue is output. */
517 xcoffout_end_epilogue (file
)
520 /* We need to pass the correct function size to .function, otherwise,
521 the xas assembler can't figure out the correct size for the function
522 aux entry. So, we emit a label after the last instruction which can
523 be used by the .function pseudo op to calculate the function size. */
525 char *fname
= XSTR (XEXP (DECL_RTL (current_function_decl
), 0), 0);
528 fprintf (file
, "FE..");
529 ASM_OUTPUT_LABEL (file
, fname
);
531 #endif /* XCOFF_DEBUGGING_INFO */