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;
58 /* Name of the current include file. */
60 char *xcoff_current_include_file;
62 /* Name of the current function file. This is the file the `.bf' is
63 emitted from. In case a line is emitted from a different file,
64 (by including that file of course), then the line number will be
67 char *xcoff_current_function_file;
69 /* Names of bss and data sections. These should be unique names for each
72 char *xcoff_bss_section_name;
73 char *xcoff_private_data_section_name;
74 char *xcoff_read_only_section_name;
76 /* Last source file name mentioned in a NOTE insn. */
80 /* Macro definitions used below. */
82 #define ABS_OR_RELATIVE_LINENO(LINENO) \
83 (xcoff_current_include_file ? (LINENO) : (LINENO) - xcoff_begin_function_line)
85 /* Output source line numbers via ".line" rather than ".stabd". */
86 #define ASM_OUTPUT_SOURCE_LINE(FILE,LINENUM) \
88 if (xcoff_begin_function_line >= 0) \
89 fprintf (FILE, "\t.line\t%d\n", ABS_OR_RELATIVE_LINENO (LINENUM)); \
92 #define ASM_OUTPUT_LFB(FILE,LINENUM) \
94 if (xcoff_begin_function_line == -1) \
96 xcoff_begin_function_line = (LINENUM) - 1;\
97 fprintf (FILE, "\t.bf\t%d\n", (LINENUM)); \
99 xcoff_current_function_file \
100 = (xcoff_current_include_file \
101 ? xcoff_current_include_file : main_input_filename); \
104 #define ASM_OUTPUT_LFE(FILE,LINENUM) \
106 fprintf (FILE, "\t.ef\t%d\n", (LINENUM)); \
107 xcoff_begin_function_line = -1; \
110 #define ASM_OUTPUT_LBB(FILE,LINENUM,BLOCKNUM) \
111 fprintf (FILE, "\t.bb\t%d\n", ABS_OR_RELATIVE_LINENO (LINENUM))
113 #define ASM_OUTPUT_LBE(FILE,LINENUM,BLOCKNUM) \
114 fprintf (FILE, "\t.eb\t%d\n", ABS_OR_RELATIVE_LINENO (LINENUM))
116 /* Support routines for XCOFF debugging info. */
118 /* Assign NUMBER as the stabx type number for the type described by NAME.
119 Search all decls in the list SYMS to find the type NAME. */
122 assign_type_number (syms, name, number)
129 for (decl = syms; decl; decl = TREE_CHAIN (decl))
131 && strcmp (IDENTIFIER_POINTER (DECL_NAME (decl)), name) == 0)
133 TREE_ASM_WRITTEN (decl) = 1;
134 TYPE_SYMTAB_ADDRESS (TREE_TYPE (decl)) = number;
138 /* Setup gcc primitive types to use the XCOFF built-in type numbers where
142 xcoff_output_standard_types (syms)
145 /* Handle built-in C types here. */
147 assign_type_number (syms, "int", (TARGET_64BIT ? -31 : -1));
148 assign_type_number (syms, "char", -2);
149 assign_type_number (syms, "short int", -3);
150 assign_type_number (syms, "long int", (TARGET_64BIT ? -31 : -4));
151 assign_type_number (syms, "unsigned char", -5);
152 assign_type_number (syms, "signed char", -6);
153 assign_type_number (syms, "short unsigned int", -7);
154 assign_type_number (syms, "unsigned int", (TARGET_64BIT ? -32 : -8));
155 /* No such type "unsigned". */
156 assign_type_number (syms, "long unsigned int", (TARGET_64BIT ? -32 : -10));
157 assign_type_number (syms, "void", -11);
158 assign_type_number (syms, "float", -12);
159 assign_type_number (syms, "double", -13);
160 assign_type_number (syms, "long double", -14);
161 /* Pascal and Fortran types run from -15 to -29. */
162 assign_type_number (syms, "wchar", -30);
163 assign_type_number (syms, "long long int", -31);
164 assign_type_number (syms, "long long unsigned int", -32);
165 /* Additional Fortran types run from -33 to -37. */
167 /* ??? Should also handle built-in C++ and Obj-C types. There perhaps
168 aren't any that C doesn't already have. */
171 /* Print an error message for unrecognized stab codes. */
173 #define UNKNOWN_STAB(STR) \
175 fprintf(stderr, "Error, unknown stab %s: : 0x%x\n", STR, stab); \
179 /* Conversion routine from BSD stabs to AIX storage classes. */
182 stab_to_sclass (stab)
191 UNKNOWN_STAB ("N_FNAME");
203 UNKNOWN_STAB ("N_MAIN");
211 UNKNOWN_STAB ("N_SSYM");
227 UNKNOWN_STAB ("N_SO");
231 UNKNOWN_STAB ("N_SOL");
235 UNKNOWN_STAB ("N_SLINE");
240 UNKNOWN_STAB ("N_DSLINE");
246 UNKNOWN_STAB ("N_BSLINE");
250 /* This has the same value as N_BSLINE. */
252 UNKNOWN_STAB ("N_BROWS");
258 UNKNOWN_STAB ("N_BINCL");
264 UNKNOWN_STAB ("N_EINCL");
270 UNKNOWN_STAB ("N_EXCL");
275 UNKNOWN_STAB ("N_LBRAC");
279 UNKNOWN_STAB ("N_RBRAC");
290 UNKNOWN_STAB ("N_LENG");
294 UNKNOWN_STAB ("N_PC");
299 UNKNOWN_STAB ("N_M2C");
305 UNKNOWN_STAB ("N_SCOPE");
310 UNKNOWN_STAB ("N_CATCH");
314 UNKNOWN_STAB ("default");
319 /* Output debugging info to FILE to switch to sourcefile FILENAME.
320 INLINE_P is true if this is from an inlined function. */
323 xcoffout_source_file (file, filename, inline_p)
329 && (xcoff_lastfile == 0 || strcmp (filename, xcoff_lastfile)
330 || (inline_p && ! xcoff_current_include_file)
331 || (! inline_p && xcoff_current_include_file)))
333 if (xcoff_current_include_file)
335 fprintf (file, "\t.ei\t");
336 output_quoted_string (file, xcoff_current_include_file);
337 fprintf (file, "\n");
338 xcoff_current_include_file = NULL;
340 if (strcmp (main_input_filename, filename) || inline_p)
342 fprintf (file, "\t.bi\t");
343 output_quoted_string (file, filename);
344 fprintf (file, "\n");
345 xcoff_current_include_file = filename;
348 xcoff_lastfile = filename;
352 /* Output a line number symbol entry into output stream FILE,
353 for source file FILENAME and line number NOTE. */
356 xcoffout_source_line (file, filename, note)
361 xcoffout_source_file (file, filename, RTX_INTEGRATED_P (note));
363 ASM_OUTPUT_SOURCE_LINE (file, NOTE_LINE_NUMBER (note));
366 /* Output the symbols defined in block number DO_BLOCK.
367 Set NEXT_BLOCK_NUMBER to 0 before calling.
369 This function works by walking the tree structure of blocks,
370 counting blocks until it finds the desired block. */
372 static int do_block = 0;
374 static int next_block_number;
377 xcoffout_block (block, depth, args)
384 /* Ignore blocks never expanded or otherwise marked as real. */
385 if (TREE_USED (block))
387 /* When we reach the specified block, output its symbols. */
388 if (next_block_number == do_block)
390 /* Output the syms of the block. */
391 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
392 dbxout_syms (BLOCK_VARS (block));
394 dbxout_reg_parms (args);
396 /* We are now done with the block. Don't go to inner blocks. */
399 /* If we are past the specified block, stop the scan. */
400 else if (next_block_number >= do_block)
405 /* Output the subblocks. */
406 xcoffout_block (BLOCK_SUBBLOCKS (block), depth + 1, NULL_TREE);
408 block = BLOCK_CHAIN (block);
412 /* Describe the beginning of an internal block within a function.
413 Also output descriptions of variables defined in this block.
415 N is the number of the block, by order of beginning, counting from 1,
416 and not counting the outermost (function top-level) block.
417 The blocks match the BLOCKs in DECL_INITIAL (current_function_decl),
418 if the count starts at 0 for the outermost one. */
421 xcoffout_begin_block (file, line, n)
426 tree decl = current_function_decl;
429 /* The IBM AIX compiler does not emit a .bb for the function level scope,
430 so we avoid it here also. */
432 ASM_OUTPUT_LBB (file, line, n);
435 next_block_number = 0;
436 xcoffout_block (DECL_INITIAL (decl), 0, DECL_ARGUMENTS (decl));
439 /* Describe the end line-number of an internal block within a function. */
442 xcoffout_end_block (file, line, n)
448 ASM_OUTPUT_LBE (file, line, n);
451 /* Called at beginning of function (before prologue).
452 Declare function as needed for debugging. */
455 xcoffout_declare_function (file, decl, name)
463 for (i = 0; name[i]; ++i)
467 n = (char *) alloca (i + 1);
468 strncpy (n, name, i);
474 /* Any pending .bi or .ei must occur before the .function pseudo op.
475 Otherwise debuggers will think that the function is in the previous
476 file and/or at the wrong line number. */
477 xcoffout_source_file (file, DECL_SOURCE_FILE (decl), 0);
478 dbxout_symbol (decl, 0);
479 fprintf (file, "\t.function .%s,.%s,16,044,FE..%s-.%s\n", n, n, n, n);
482 /* Called at beginning of function body (after prologue).
483 Record the function's starting line number, so we can output
484 relative line numbers for the other lines.
485 Record the file name that this function is contained in. */
488 xcoffout_begin_function (file, last_linenum)
492 ASM_OUTPUT_LFB (file, last_linenum);
493 dbxout_parms (DECL_ARGUMENTS (current_function_decl));
494 ASM_OUTPUT_SOURCE_LINE (file, last_linenum);
497 /* Called at end of function (before epilogue).
498 Describe end of outermost block. */
501 xcoffout_end_function (file, last_linenum)
505 ASM_OUTPUT_LFE (file, last_linenum);
508 /* Output xcoff info for the absolute end of a function.
509 Called after the epilogue is output. */
512 xcoffout_end_epilogue (file)
515 /* We need to pass the correct function size to .function, otherwise,
516 the xas assembler can't figure out the correct size for the function
517 aux entry. So, we emit a label after the last instruction which can
518 be used by the .function pseudo op to calculate the function size. */
520 char *fname = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0);
523 fprintf (file, "FE..");
524 ASM_OUTPUT_LABEL (file, fname);
526 #endif /* XCOFF_DEBUGGING_INFO */