1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494
|
/* Output xcoff-format symbol table information from GNU compiler.
Copyright (C) 1992-2018 Free Software Foundation, Inc.
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
/* Output xcoff-format symbol table data. The main functionality is contained
in dbxout.c. This file implements the sdbout-like parts of the xcoff
interface. Many functions are very similar to their counterparts in
the former sdbout.c file. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "target.h"
#include "rtl.h"
#include "tree.h"
#include "diagnostic-core.h"
#include "varasm.h"
#include "output.h"
#include "debug.h"
#include "file-prefix-map.h" /* remap_debug_filename() */
#ifdef XCOFF_DEBUGGING_INFO
/* This defines the C_* storage classes. */
#include "xcoff.h"
#include "xcoffout.h"
#include "dbxout.h"
#include "gstab.h"
/* Line number of beginning of current function, minus one.
Negative means not in a function or not using xcoff. */
static int xcoff_begin_function_line = -1;
static int xcoff_inlining = 0;
/* Name of the current include file. */
const char *xcoff_current_include_file;
/* Name of the current function file. This is the file the `.bf' is
emitted from. In case a line is emitted from a different file,
(by including that file of course), then the line number will be
absolute. */
static const char *xcoff_current_function_file;
/* Names of bss and data sections. These should be unique names for each
compilation unit. */
char *xcoff_bss_section_name;
char *xcoff_private_data_section_name;
char *xcoff_tls_data_section_name;
char *xcoff_tbss_section_name;
char *xcoff_read_only_section_name;
/* Last source file name mentioned in a NOTE insn. */
const char *xcoff_lastfile;
/* Macro definitions used below. */
#define ABS_OR_RELATIVE_LINENO(LINENO) \
((xcoff_inlining) ? (LINENO) : (LINENO) - xcoff_begin_function_line)
/* Output source line numbers via ".line". */
#define ASM_OUTPUT_LINE(FILE,LINENUM) \
do \
{ \
/* Make sure we're in a function and prevent output of .line 0, as \
line # 0 is meant for symbol addresses in xcoff. Additionally, \
line numbers are 'unsigned short' in 32-bit mode. */ \
if (xcoff_begin_function_line >= 0) \
{ \
int lno = ABS_OR_RELATIVE_LINENO (LINENUM); \
if (lno > 0 && (TARGET_64BIT || lno <= (int)USHRT_MAX)) \
fprintf (FILE, "\t.line\t%d\n", lno); \
} \
} \
while (0)
#define ASM_OUTPUT_LFB(FILE,LINENUM) \
{ \
if (xcoff_begin_function_line == -1) \
{ \
xcoff_begin_function_line = (LINENUM) - 1;\
fprintf (FILE, "\t.bf\t%d\n", (LINENUM)); \
} \
xcoff_current_function_file \
= (xcoff_current_include_file \
? xcoff_current_include_file : main_input_filename); \
}
#define ASM_OUTPUT_LFE(FILE,LINENUM) \
do \
{ \
fprintf (FILE, "\t.ef\t%d\n", (LINENUM)); \
xcoff_begin_function_line = -1; \
} \
while (0)
#define ASM_OUTPUT_LBB(FILE,LINENUM,BLOCKNUM) \
fprintf (FILE, "\t.bb\t%d\n", ABS_OR_RELATIVE_LINENO (LINENUM))
#define ASM_OUTPUT_LBE(FILE,LINENUM,BLOCKNUM) \
fprintf (FILE, "\t.eb\t%d\n", ABS_OR_RELATIVE_LINENO (LINENUM))
static void xcoffout_block (tree, int, tree);
static void xcoffout_source_file (FILE *, const char *, int);
/* Support routines for XCOFF debugging info. */
struct xcoff_type_number
{
const char *name;
int number;
};
static const struct xcoff_type_number xcoff_type_numbers[] = {
{ "int", -1 },
{ "char", -2 },
{ "short int", -3 },
{ "long int", -4 }, /* fiddled to -31 if 64 bits */
{ "unsigned char", -5 },
{ "signed char", -6 },
{ "short unsigned int", -7 },
{ "unsigned int", -8 },
/* No such type "unsigned". */
{ "long unsigned int", -10 }, /* fiddled to -32 if 64 bits */
{ "void", -11 },
{ "float", -12 },
{ "double", -13 },
{ "long double", -14 },
/* Fortran types run from -15 to -29. */
{ "wchar", -30 }, /* XXX Should be "wchar_t" ? */
{ "long long int", -31 },
{ "long long unsigned int", -32 },
/* Additional Fortran types run from -33 to -37. */
/* ??? Should also handle built-in C++ and Obj-C types. There perhaps
aren't any that C doesn't already have. */
};
/* Returns an XCOFF fundamental type number for DECL (assumed to be a
TYPE_DECL), or 0 if dbxout.c should assign a type number normally. */
int
xcoff_assign_fundamental_type_number (tree decl)
{
const char *name;
size_t i;
/* Do not waste time searching the list for non-intrinsic types. */
if (DECL_NAME (decl) == 0 || ! DECL_IS_BUILTIN (decl))
return 0;
name = IDENTIFIER_POINTER (DECL_NAME (decl));
/* Linear search, blech, but the list is too small to bother
doing anything else. */
for (i = 0; i < ARRAY_SIZE (xcoff_type_numbers); i++)
if (!strcmp (xcoff_type_numbers[i].name, name))
goto found;
return 0;
found:
/* -4 and -10 should be replaced with -31 and -32, respectively,
when used for a 64-bit type. */
if (int_size_in_bytes (TREE_TYPE (decl)) == 8)
{
if (xcoff_type_numbers[i].number == -4)
return -31;
if (xcoff_type_numbers[i].number == -10)
return -32;
}
return xcoff_type_numbers[i].number;
}
/* Print an error message for unrecognized stab codes. */
#define UNKNOWN_STAB(STR) \
internal_error ("no sclass for %s stab (0x%x)", STR, stab)
/* Conversion routine from BSD stabs to AIX storage classes. */
int
stab_to_sclass (int stab)
{
switch (stab)
{
case N_GSYM:
return C_GSYM;
case N_FNAME:
UNKNOWN_STAB ("N_FNAME");
case N_FUN:
return C_FUN;
case N_STSYM:
case N_LCSYM:
return C_STSYM;
case N_MAIN:
UNKNOWN_STAB ("N_MAIN");
case N_RSYM:
return C_RSYM;
case N_SSYM:
UNKNOWN_STAB ("N_SSYM");
case N_RPSYM:
return C_RPSYM;
case N_PSYM:
return C_PSYM;
case N_LSYM:
return C_LSYM;
case N_DECL:
return C_DECL;
case N_ENTRY:
return C_ENTRY;
case N_SO:
UNKNOWN_STAB ("N_SO");
case N_SOL:
UNKNOWN_STAB ("N_SOL");
case N_SLINE:
UNKNOWN_STAB ("N_SLINE");
case N_DSLINE:
UNKNOWN_STAB ("N_DSLINE");
case N_BSLINE:
UNKNOWN_STAB ("N_BSLINE");
case N_BINCL:
UNKNOWN_STAB ("N_BINCL");
case N_EINCL:
UNKNOWN_STAB ("N_EINCL");
case N_EXCL:
UNKNOWN_STAB ("N_EXCL");
case N_LBRAC:
UNKNOWN_STAB ("N_LBRAC");
case N_RBRAC:
UNKNOWN_STAB ("N_RBRAC");
case N_BCOMM:
return C_BCOMM;
case N_ECOMM:
return C_ECOMM;
case N_ECOML:
return C_ECOML;
case N_LENG:
UNKNOWN_STAB ("N_LENG");
case N_PC:
UNKNOWN_STAB ("N_PC");
case N_M2C:
UNKNOWN_STAB ("N_M2C");
case N_SCOPE:
UNKNOWN_STAB ("N_SCOPE");
case N_CATCH:
UNKNOWN_STAB ("N_CATCH");
case N_OPT:
UNKNOWN_STAB ("N_OPT");
default:
UNKNOWN_STAB ("?");
}
}
/* Output debugging info to FILE to switch to sourcefile FILENAME.
INLINE_P is true if this is from an inlined function. */
static void
xcoffout_source_file (FILE *file, const char *filename, int inline_p)
{
if (filename
&& (xcoff_lastfile == 0 || strcmp (filename, xcoff_lastfile)
|| (inline_p && ! xcoff_inlining)
|| (! inline_p && xcoff_inlining)))
{
if (xcoff_current_include_file)
{
fprintf (file, "\t.ei\t");
output_quoted_string (file,
remap_debug_filename (xcoff_current_include_file));
fprintf (file, "\n");
xcoff_current_include_file = NULL;
}
xcoff_inlining = inline_p;
if (strcmp (main_input_filename, filename) || inline_p)
{
fprintf (file, "\t.bi\t");
output_quoted_string (file, remap_debug_filename (filename));
fprintf (file, "\n");
xcoff_current_include_file = filename;
}
xcoff_lastfile = filename;
}
}
/* Output a line number symbol entry for location (FILENAME, LINE). */
void
xcoffout_source_line (unsigned int line, unsigned int column ATTRIBUTE_UNUSED,
const char *filename, int discriminator ATTRIBUTE_UNUSED,
bool is_stmt ATTRIBUTE_UNUSED)
{
bool inline_p = (strcmp (xcoff_current_function_file, filename) != 0
|| (int) line < xcoff_begin_function_line);
xcoffout_source_file (asm_out_file, filename, inline_p);
ASM_OUTPUT_LINE (asm_out_file, line);
}
/* Output the symbols defined in block number DO_BLOCK.
This function works by walking the tree structure of blocks,
counting blocks until it finds the desired block. */
static int do_block = 0;
static void
xcoffout_block (tree block, int depth, tree args)
{
while (block)
{
/* Ignore blocks never expanded or otherwise marked as real. */
if (TREE_USED (block))
{
/* When we reach the specified block, output its symbols. */
if (BLOCK_NUMBER (block) == do_block)
{
/* Output the syms of the block. */
if (debug_info_level != DINFO_LEVEL_TERSE || depth == 0)
dbxout_syms (BLOCK_VARS (block));
if (args)
dbxout_reg_parms (args);
/* We are now done with the block. Don't go to inner blocks. */
return;
}
/* If we are past the specified block, stop the scan. */
else if (BLOCK_NUMBER (block) >= do_block)
return;
/* Output the subblocks. */
xcoffout_block (BLOCK_SUBBLOCKS (block), depth + 1, NULL_TREE);
}
block = BLOCK_CHAIN (block);
}
}
/* Describe the beginning of an internal block within a function.
Also output descriptions of variables defined in this block.
N is the number of the block, by order of beginning, counting from 1,
and not counting the outermost (function top-level) block.
The blocks match the BLOCKs in DECL_INITIAL (current_function_decl),
if the count starts at 0 for the outermost one. */
void
xcoffout_begin_block (unsigned int line, unsigned int n)
{
tree decl = current_function_decl;
/* The IBM AIX compiler does not emit a .bb for the function level scope,
so we avoid it here also. */
if (n != 1)
ASM_OUTPUT_LBB (asm_out_file, line, n);
do_block = n;
xcoffout_block (DECL_INITIAL (decl), 0, DECL_ARGUMENTS (decl));
}
/* Describe the end line-number of an internal block within a function. */
void
xcoffout_end_block (unsigned int line, unsigned int n)
{
if (n != 1)
ASM_OUTPUT_LBE (asm_out_file, line, n);
}
/* Called at beginning of function (before prologue).
Declare function as needed for debugging. */
void
xcoffout_declare_function (FILE *file, tree decl, const char *name)
{
size_t len;
if (*name == '*')
name++;
len = strlen (name);
if (name[len - 1] == ']')
{
char *n = XALLOCAVEC (char, len - 3);
memcpy (n, name, len - 4);
n[len - 4] = '\0';
name = n;
}
/* Any pending .bi or .ei must occur before the .function pseudo op.
Otherwise debuggers will think that the function is in the previous
file and/or at the wrong line number. */
xcoffout_source_file (file, DECL_SOURCE_FILE (decl), 0);
dbxout_symbol (decl, 0);
/* .function NAME, TOP, MAPPING, TYPE, SIZE
16 and 044 are placeholders for backwards compatibility */
fprintf (file, "\t.function .%s,.%s,16,044,FE..%s-.%s\n",
name, name, name, name);
}
/* Called at beginning of function body (at start of prologue).
Record the function's starting line number, so we can output
relative line numbers for the other lines.
Record the file name that this function is contained in. */
void
xcoffout_begin_prologue (unsigned int line,
unsigned int column ATTRIBUTE_UNUSED,
const char *file ATTRIBUTE_UNUSED)
{
ASM_OUTPUT_LFB (asm_out_file, line);
dbxout_parms (DECL_ARGUMENTS (current_function_decl));
/* Emit the symbols for the outermost BLOCK's variables. sdbout.c did this
in sdbout_begin_block, but there is no guarantee that there will be any
inner block 1, so we must do it here. This gives a result similar to
dbxout, so it does make some sense. */
do_block = BLOCK_NUMBER (DECL_INITIAL (current_function_decl));
xcoffout_block (DECL_INITIAL (current_function_decl), 0,
DECL_ARGUMENTS (current_function_decl));
ASM_OUTPUT_LINE (asm_out_file, line);
}
/* Called at end of function (before epilogue).
Describe end of outermost block. */
void
xcoffout_end_function (unsigned int last_linenum)
{
ASM_OUTPUT_LFE (asm_out_file, last_linenum);
}
/* Output xcoff info for the absolute end of a function.
Called after the epilogue is output. */
void
xcoffout_end_epilogue (unsigned int line ATTRIBUTE_UNUSED,
const char *file ATTRIBUTE_UNUSED)
{
/* We need to pass the correct function size to .function, otherwise,
the xas assembler can't figure out the correct size for the function
aux entry. So, we emit a label after the last instruction which can
be used by the .function pseudo op to calculate the function size. */
const char *fname = XSTR (XEXP (DECL_RTL (current_function_decl), 0), 0);
if (*fname == '*')
++fname;
fprintf (asm_out_file, "FE..");
ASM_OUTPUT_LABEL (asm_out_file, fname);
}
#endif /* XCOFF_DEBUGGING_INFO */
|