1 /* Output xcoff-format symbol table information from GNU compiler.
2 Copyright (C) 1992, 1994, 1995, 1997, 1998, 1999, 2000, 2002, 2003
3 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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
29 #include "coretypes.h"
39 #ifdef XCOFF_DEBUGGING_INFO
41 /* This defines the C_* storage classes. */
47 /* Line number of beginning of current function, minus one.
48 Negative means not in a function or not using xcoff. */
50 static int xcoff_begin_function_line = -1;
51 static int xcoff_inlining = 0;
53 /* Name of the current include file. */
55 const char *xcoff_current_include_file;
57 /* Name of the current function file. This is the file the `.bf' is
58 emitted from. In case a line is emitted from a different file,
59 (by including that file of course), then the line number will be
62 static const char *xcoff_current_function_file;
64 /* Names of bss and data sections. These should be unique names for each
67 char *xcoff_bss_section_name;
68 char *xcoff_private_data_section_name;
69 char *xcoff_read_only_section_name;
71 /* Last source file name mentioned in a NOTE insn. */
73 const char *xcoff_lastfile;
75 /* Macro definitions used below. */
77 #define ABS_OR_RELATIVE_LINENO(LINENO) \
78 ((xcoff_inlining) ? (LINENO) : (LINENO) - xcoff_begin_function_line)
80 /* Output source line numbers via ".line" rather than ".stabd". */
81 #define ASM_OUTPUT_SOURCE_LINE(FILE,LINENUM,COUNTER) \
84 if (xcoff_begin_function_line >= 0) \
85 fprintf (FILE, "\t.line\t%d\n", ABS_OR_RELATIVE_LINENO (LINENUM)); \
89 #define ASM_OUTPUT_LFB(FILE,LINENUM) \
91 if (xcoff_begin_function_line == -1) \
93 xcoff_begin_function_line = (LINENUM) - 1;\
94 fprintf (FILE, "\t.bf\t%d\n", (LINENUM)); \
96 xcoff_current_function_file \
97 = (xcoff_current_include_file \
98 ? xcoff_current_include_file : main_input_filename); \
101 #define ASM_OUTPUT_LFE(FILE,LINENUM) \
104 fprintf (FILE, "\t.ef\t%d\n", (LINENUM)); \
105 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 xcoffout_block (tree, int, tree);
116 static void xcoffout_source_file (FILE *, const char *, int);
118 /* Support routines for XCOFF debugging info. */
120 struct xcoff_type_number
125 static const struct xcoff_type_number xcoff_type_numbers[] = {
129 { "long int", -4 }, /* fiddled to -31 if 64 bits */
130 { "unsigned char", -5 },
131 { "signed char", -6 },
132 { "short unsigned int", -7 },
133 { "unsigned int", -8 },
134 /* No such type "unsigned". */
135 { "long unsigned int", -10 }, /* fiddled to -32 if 64 bits */
139 { "long double", -14 },
140 /* Pascal and Fortran types run from -15 to -29. */
141 { "wchar", -30 }, /* XXX Should be "wchar_t" ? */
142 { "long long int", -31 },
143 { "long long unsigned int", -32 },
144 /* Additional Fortran types run from -33 to -37. */
146 /* ??? Should also handle built-in C++ and Obj-C types. There perhaps
147 aren't any that C doesn't already have. */
150 /* Returns an XCOFF fundamental type number for DECL (assumed to be a
151 TYPE_DECL), or 0 if dbxout.c should assign a type number normally. */
153 xcoff_assign_fundamental_type_number (tree decl)
155 const char *name = IDENTIFIER_POINTER (DECL_NAME (decl));
158 /* Do not waste time searching the list for non-intrinsic types. */
159 if (DECL_SOURCE_LINE (decl) > 0)
162 /* Linear search, blech, but the list is too small to bother
163 doing anything else. */
164 for (i = 0; i < ARRAY_SIZE (xcoff_type_numbers); i++)
165 if (!strcmp (xcoff_type_numbers[i].name, name))
170 /* -4 and -10 should be replaced with -31 and -32, respectively,
171 when used for a 64-bit type. */
172 if (int_size_in_bytes (TREE_TYPE (decl)) == 8)
174 if (xcoff_type_numbers[i].number == -4)
176 if (xcoff_type_numbers[i].number == -10)
179 return xcoff_type_numbers[i].number;
182 /* Print an error message for unrecognized stab codes. */
184 #define UNKNOWN_STAB(STR) \
185 internal_error ("no sclass for %s stab (0x%x)\n", STR, stab)
187 /* Conversion routine from BSD stabs to AIX storage classes. */
190 stab_to_sclass (int stab)
198 UNKNOWN_STAB ("N_FNAME");
208 UNKNOWN_STAB ("N_MAIN");
214 UNKNOWN_STAB ("N_SSYM");
229 UNKNOWN_STAB ("N_SO");
232 UNKNOWN_STAB ("N_SOL");
235 UNKNOWN_STAB ("N_SLINE");
238 UNKNOWN_STAB ("N_DSLINE");
241 UNKNOWN_STAB ("N_BSLINE");
244 UNKNOWN_STAB ("N_BINCL");
247 UNKNOWN_STAB ("N_EINCL");
250 UNKNOWN_STAB ("N_EXCL");
253 UNKNOWN_STAB ("N_LBRAC");
256 UNKNOWN_STAB ("N_RBRAC");
266 UNKNOWN_STAB ("N_LENG");
269 UNKNOWN_STAB ("N_PC");
272 UNKNOWN_STAB ("N_M2C");
275 UNKNOWN_STAB ("N_SCOPE");
278 UNKNOWN_STAB ("N_CATCH");
281 UNKNOWN_STAB ("N_OPT");
288 /* Output debugging info to FILE to switch to sourcefile FILENAME.
289 INLINE_P is true if this is from an inlined function. */
292 xcoffout_source_file (FILE *file, const char *filename, int inline_p)
295 && (xcoff_lastfile == 0 || strcmp (filename, xcoff_lastfile)
296 || (inline_p && ! xcoff_inlining)
297 || (! inline_p && xcoff_inlining)))
299 if (xcoff_current_include_file)
301 fprintf (file, "\t.ei\t");
302 output_quoted_string (file, xcoff_current_include_file);
303 fprintf (file, "\n");
304 xcoff_current_include_file = NULL;
306 xcoff_inlining = inline_p;
307 if (strcmp (main_input_filename, filename) || inline_p)
309 fprintf (file, "\t.bi\t");
310 output_quoted_string (file, filename);
311 fprintf (file, "\n");
312 xcoff_current_include_file = filename;
314 xcoff_lastfile = filename;
318 /* Output a line number symbol entry for location (FILENAME, LINE). */
321 xcoffout_source_line (unsigned int line, const char *filename)
323 bool inline_p = (strcmp (xcoff_current_function_file, filename) != 0
324 || (int) line < xcoff_begin_function_line);
326 xcoffout_source_file (asm_out_file, filename, inline_p);
328 ASM_OUTPUT_SOURCE_LINE (asm_out_file, line, 0);
331 /* Output the symbols defined in block number DO_BLOCK.
333 This function works by walking the tree structure of blocks,
334 counting blocks until it finds the desired block. */
336 static int do_block = 0;
339 xcoffout_block (tree block, int depth, tree args)
343 /* Ignore blocks never expanded or otherwise marked as real. */
344 if (TREE_USED (block))
346 /* When we reach the specified block, output its symbols. */
347 if (BLOCK_NUMBER (block) == do_block)
349 /* Output the syms of the block. */
350 if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
351 dbxout_syms (BLOCK_VARS (block));
353 dbxout_reg_parms (args);
355 /* We are now done with the block. Don't go to inner blocks. */
358 /* If we are past the specified block, stop the scan. */
359 else if (BLOCK_NUMBER (block) >= do_block)
362 /* Output the subblocks. */
363 xcoffout_block (BLOCK_SUBBLOCKS (block), depth + 1, NULL_TREE);
365 block = BLOCK_CHAIN (block);
369 /* Describe the beginning of an internal block within a function.
370 Also output descriptions of variables defined in this block.
372 N is the number of the block, by order of beginning, counting from 1,
373 and not counting the outermost (function top-level) block.
374 The blocks match the BLOCKs in DECL_INITIAL (current_function_decl),
375 if the count starts at 0 for the outermost one. */
378 xcoffout_begin_block (unsigned int line, unsigned int n)
380 tree decl = current_function_decl;
382 /* The IBM AIX compiler does not emit a .bb for the function level scope,
383 so we avoid it here also. */
385 ASM_OUTPUT_LBB (asm_out_file, line, n);
388 xcoffout_block (DECL_INITIAL (decl), 0, DECL_ARGUMENTS (decl));
391 /* Describe the end line-number of an internal block within a function. */
394 xcoffout_end_block (unsigned int line, unsigned int n)
397 ASM_OUTPUT_LBE (asm_out_file, line, n);
400 /* Called at beginning of function (before prologue).
401 Declare function as needed for debugging. */
404 xcoffout_declare_function (FILE *file, tree decl, const char *name)
411 for (i = 0; name[i]; ++i)
415 char *n = alloca (i + 1);
416 strncpy (n, name, i);
423 /* Any pending .bi or .ei must occur before the .function pseudo op.
424 Otherwise debuggers will think that the function is in the previous
425 file and/or at the wrong line number. */
426 xcoffout_source_file (file, DECL_SOURCE_FILE (decl), 0);
427 dbxout_symbol (decl, 0);
429 /* .function NAME, TOP, MAPPING, TYPE, SIZE
430 16 and 044 are placeholders for backwards compatibility */
431 fprintf (file, "\t.function .%s,.%s,16,044,FE..%s-.%s\n",
432 name, name, name, name);
435 /* Called at beginning of function body (at start of prologue).
436 Record the function's starting line number, so we can output
437 relative line numbers for the other lines.
438 Record the file name that this function is contained in. */
441 xcoffout_begin_prologue (unsigned int line,
442 const char *file ATTRIBUTE_UNUSED)
444 ASM_OUTPUT_LFB (asm_out_file, line);
445 dbxout_parms (DECL_ARGUMENTS (current_function_decl));
447 /* Emit the symbols for the outermost BLOCK's variables. sdbout.c does this
448 in sdbout_begin_block, but there is no guarantee that there will be any
449 inner block 1, so we must do it here. This gives a result similar to
450 dbxout, so it does make some sense. */
451 do_block = BLOCK_NUMBER (DECL_INITIAL (current_function_decl));
452 xcoffout_block (DECL_INITIAL (current_function_decl), 0,
453 DECL_ARGUMENTS (current_function_decl));
455 ASM_OUTPUT_SOURCE_LINE (asm_out_file, line, 0);
458 /* Called at end of function (before epilogue).
459 Describe end of outermost block. */
462 xcoffout_end_function (unsigned int last_linenum)
464 ASM_OUTPUT_LFE (asm_out_file, last_linenum);
467 /* Output xcoff info for the absolute end of a function.
468 Called after the epilogue is output. */
471 xcoffout_end_epilogue (unsigned int line ATTRIBUTE_UNUSED,
472 const char *file ATTRIBUTE_UNUSED)
474 /* We need to pass the correct function size to .function, otherwise,
475 the xas assembler can't figure out the correct size for the function
476 aux entry. So, we emit a label after the last instruction which can
477 be used by the .function pseudo op to calculate the function size. */
479 const char *fname = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0);
482 fprintf (asm_out_file, "FE..");
483 ASM_OUTPUT_LABEL (asm_out_file, fname);
485 #endif /* XCOFF_DEBUGGING_INFO */