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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [dwarf2asm.c] - Blame information for rev 328

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1 280 jeremybenn 
/* Dwarf2 assembler output helper routines.
2 
   Copyright (C) 2001, 2002, 2003, 2004, 2005, 2007, 2008, 2009, 2010
3 
   Free Software Foundation, Inc.
4 
 
5 
This file is part of GCC.
6 
 
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 3, or (at your option) any later
10 
version.
11 
 
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
15 
for more details.
16 
 
17 
You should have received a copy of the GNU General Public License
18 
along with GCC; see the file COPYING3.  If not see
19 
<http://www.gnu.org/licenses/>.  */
20 
 
21 
 
22 
#include "config.h"
23 
#include "system.h"
24 
#include "coretypes.h"
25 
#include "tm.h"
26 
#include "flags.h"
27 
#include "tree.h"
28 
#include "rtl.h"
29 
#include "output.h"
30 
#include "target.h"
31 
#include "dwarf2asm.h"
32 
#include "dwarf2.h"
33 
#include "splay-tree.h"
34 
#include "ggc.h"
35 
#include "tm_p.h"
36 
 
37 
 
38 
/* How to start an assembler comment.  */
39 
#ifndef ASM_COMMENT_START
40 
#define ASM_COMMENT_START ";#"
41 
#endif
42 
 
43 
 
44 
/* Output an unaligned integer with the given value and size.  Prefer not
45 
   to print a newline, since the caller may want to add a comment.  */
46 
 
47 
void
48 
dw2_assemble_integer (int size, rtx x)
49 
{
50 
  const char *op = integer_asm_op (size, FALSE);
51 
 
52 
  if (op)
53 
    {
54 
      fputs (op, asm_out_file);
55 
      if (CONST_INT_P (x))
56 
        fprintf (asm_out_file, HOST_WIDE_INT_PRINT_HEX,
57 
                 (unsigned HOST_WIDE_INT) INTVAL (x));
58 
      else
59 
        output_addr_const (asm_out_file, x);
60 
    }
61 
  else
62 
    assemble_integer (x, size, BITS_PER_UNIT, 1);
63 
}
64 
 
65 
 
66 
/* Output a value of a given size in target byte order.  */
67 
 
68 
void
69 
dw2_asm_output_data_raw (int size, unsigned HOST_WIDE_INT value)
70 
{
71 
  unsigned char bytes[8];
72 
  int i;
73 
 
74 
  for (i = 0; i < 8; ++i)
75 
    {
76 
      bytes[i] = value & 0xff;
77 
      value >>= 8;
78 
    }
79 
 
80 
  if (BYTES_BIG_ENDIAN)
81 
    {
82 
      for (i = size - 1; i > 0; --i)
83 
        fprintf (asm_out_file, "0x%x,", bytes[i]);
84 
      fprintf (asm_out_file, "0x%x", bytes[0]);
85 
    }
86 
  else
87 
    {
88 
      for (i = 0; i < size - 1; ++i)
89 
        fprintf (asm_out_file, "0x%x,", bytes[i]);
90 
      fprintf (asm_out_file, "0x%x", bytes[i]);
91 
    }
92 
}
93 
 
94 
/* Output an immediate constant in a given SIZE in bytes.  */
95 
 
96 
void
97 
dw2_asm_output_data (int size, unsigned HOST_WIDE_INT value,
98 
                     const char *comment, ...)
99 
{
100 
  va_list ap;
101 
  const char *op = integer_asm_op (size, FALSE);
102 
 
103 
  va_start (ap, comment);
104 
 
105 
  if (size * 8 < HOST_BITS_PER_WIDE_INT)
106 
    value &= ~(~(unsigned HOST_WIDE_INT) 0 << (size * 8));
107 
 
108 
  if (op)
109 
    fprintf (asm_out_file, "%s" HOST_WIDE_INT_PRINT_HEX, op, value);
110 
  else
111 
    assemble_integer (GEN_INT (value), size, BITS_PER_UNIT, 1);
112 
 
113 
  if (flag_debug_asm && comment)
114 
    {
115 
      fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START);
116 
      vfprintf (asm_out_file, comment, ap);
117 
    }
118 
  fputc ('\n', asm_out_file);
119 
 
120 
  va_end (ap);
121 
}
122 
 
123 
/* Output the difference between two symbols in a given size.  */
124 
/* ??? There appear to be assemblers that do not like such
125 
   subtraction, but do support ASM_SET_OP.  It's unfortunately
126 
   impossible to do here, since the ASM_SET_OP for the difference
127 
   symbol must appear after both symbols are defined.  */
128 
 
129 
void
130 
dw2_asm_output_delta (int size, const char *lab1, const char *lab2,
131 
                      const char *comment, ...)
132 
{
133 
  va_list ap;
134 
 
135 
  va_start (ap, comment);
136 
 
137 
#ifdef ASM_OUTPUT_DWARF_DELTA
138 
  ASM_OUTPUT_DWARF_DELTA (asm_out_file, size, lab1, lab2);
139 
#else
140 
  dw2_assemble_integer (size,
141 
                        gen_rtx_MINUS (Pmode,
142 
                                       gen_rtx_SYMBOL_REF (Pmode, lab1),
143 
                                       gen_rtx_SYMBOL_REF (Pmode, lab2)));
144 
#endif
145 
  if (flag_debug_asm && comment)
146 
    {
147 
      fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START);
148 
      vfprintf (asm_out_file, comment, ap);
149 
    }
150 
  fputc ('\n', asm_out_file);
151 
 
152 
  va_end (ap);
153 
}
154 
 
155 
/* Output a section-relative reference to a LABEL, which was placed in
156 
   BASE.  In general this can only be done for debugging symbols.
157 
   E.g. on most targets with the GNU linker, this is accomplished with
158 
   a direct reference and the knowledge that the debugging section
159 
   will be placed at VMA 0.  Some targets have special relocations for
160 
   this that we must use.  */
161 
 
162 
void
163 
dw2_asm_output_offset (int size, const char *label,
164 
                       section *base ATTRIBUTE_UNUSED,
165 
                       const char *comment, ...)
166 
{
167 
  va_list ap;
168 
 
169 
  va_start (ap, comment);
170 
 
171 
#ifdef ASM_OUTPUT_DWARF_OFFSET
172 
  ASM_OUTPUT_DWARF_OFFSET (asm_out_file, size, label, base);
173 
#else
174 
  dw2_assemble_integer (size, gen_rtx_SYMBOL_REF (Pmode, label));
175 
#endif
176 
 
177 
  if (flag_debug_asm && comment)
178 
    {
179 
      fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START);
180 
      vfprintf (asm_out_file, comment, ap);
181 
    }
182 
  fputc ('\n', asm_out_file);
183 
 
184 
  va_end (ap);
185 
}
186 
 
187 
#if 0
188 
 
189 
/* Output a self-relative reference to a label, possibly in a
190 
   different section or object file.  */
191 
 
192 
void
193 
dw2_asm_output_pcrel (int size ATTRIBUTE_UNUSED,
194 
                      const char *label ATTRIBUTE_UNUSED,
195 
                      const char *comment, ...)
196 
{
197 
  va_list ap;
198 
 
199 
  va_start (ap, comment);
200 
 
201 
#ifdef ASM_OUTPUT_DWARF_PCREL
202 
  ASM_OUTPUT_DWARF_PCREL (asm_out_file, size, label);
203 
#else
204 
  dw2_assemble_integer (size,
205 
                        gen_rtx_MINUS (Pmode,
206 
                                       gen_rtx_SYMBOL_REF (Pmode, label),
207 
                                       pc_rtx));
208 
#endif
209 
 
210 
  if (flag_debug_asm && comment)
211 
    {
212 
      fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START);
213 
      vfprintf (asm_out_file, comment, ap);
214 
    }
215 
  fputc ('\n', asm_out_file);
216 
 
217 
  va_end (ap);
218 
}
219 
#endif /* 0 */
220 
 
221 
/* Output an absolute reference to a label.  */
222 
 
223 
void
224 
dw2_asm_output_addr (int size, const char *label,
225 
                     const char *comment, ...)
226 
{
227 
  va_list ap;
228 
 
229 
  va_start (ap, comment);
230 
 
231 
  dw2_assemble_integer (size, gen_rtx_SYMBOL_REF (Pmode, label));
232 
 
233 
  if (flag_debug_asm && comment)
234 
    {
235 
      fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START);
236 
      vfprintf (asm_out_file, comment, ap);
237 
    }
238 
  fputc ('\n', asm_out_file);
239 
 
240 
  va_end (ap);
241 
}
242 
 
243 
/* Similar, but use an RTX expression instead of a text label.  */
244 
 
245 
void
246 
dw2_asm_output_addr_rtx (int size, rtx addr,
247 
                         const char *comment, ...)
248 
{
249 
  va_list ap;
250 
 
251 
  va_start (ap, comment);
252 
 
253 
  dw2_assemble_integer (size, addr);
254 
 
255 
  if (flag_debug_asm && comment)
256 
    {
257 
      fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START);
258 
      vfprintf (asm_out_file, comment, ap);
259 
    }
260 
  fputc ('\n', asm_out_file);
261 
 
262 
  va_end (ap);
263 
}
264 
 
265 
/* Output the first ORIG_LEN characters of STR as a string.
266 
   If ORIG_LEN is equal to -1, ignore this parameter and output
267 
   the entire STR instead.
268 
   If COMMENT is not NULL and comments in the debug information
269 
   have been requested by the user, append the given COMMENT
270 
   to the generated output.  */
271 
 
272 
void
273 
dw2_asm_output_nstring (const char *str, size_t orig_len,
274 
                        const char *comment, ...)
275 
{
276 
  size_t i, len;
277 
  va_list ap;
278 
 
279 
  va_start (ap, comment);
280 
 
281 
  len = orig_len;
282 
 
283 
  if (len == (size_t) -1)
284 
    len = strlen (str);
285 
 
286 
  if (flag_debug_asm && comment)
287 
    {
288 
      fputs ("\t.ascii \"", asm_out_file);
289 
      for (i = 0; i < len; i++)
290 
        {
291 
          int c = str[i];
292 
          if (c == '\"' || c == '\\')
293 
            fputc ('\\', asm_out_file);
294 
          if (ISPRINT(c))
295 
            fputc (c, asm_out_file);
296 
          else
297 
            fprintf (asm_out_file, "\\%o", c);
298 
        }
299 
      fprintf (asm_out_file, "\\0\"\t%s ", ASM_COMMENT_START);
300 
      vfprintf (asm_out_file, comment, ap);
301 
      fputc ('\n', asm_out_file);
302 
    }
303 
  else
304 
    {
305 
      /* If an explicit length was given, we can't assume there
306 
         is a null termination in the string buffer.  */
307 
      if (orig_len == (size_t) -1)
308 
        len += 1;
309 
      ASM_OUTPUT_ASCII (asm_out_file, str, len);
310 
      if (orig_len != (size_t) -1)
311 
        assemble_integer (const0_rtx, 1, BITS_PER_UNIT, 1);
312 
    }
313 
 
314 
  va_end (ap);
315 
}
316 
 
317 
 
318 
/* Return the size of an unsigned LEB128 quantity.  */
319 
 
320 
int
321 
size_of_uleb128 (unsigned HOST_WIDE_INT value)
322 
{
323 
  int size = 0;
324 
 
325 
  do
326 
    {
327 
      value >>= 7;
328 
      size += 1;
329 
    }
330 
  while (value != 0);
331 
 
332 
  return size;
333 
}
334 
 
335 
/* Return the size of a signed LEB128 quantity.  */
336 
 
337 
int
338 
size_of_sleb128 (HOST_WIDE_INT value)
339 
{
340 
  int size = 0, byte;
341 
 
342 
  do
343 
    {
344 
      byte = (value & 0x7f);
345 
      value >>= 7;
346 
      size += 1;
347 
    }
348 
  while (!((value == 0 && (byte & 0x40) == 0)
349 
           || (value == -1 && (byte & 0x40) != 0)));
350 
 
351 
  return size;
352 
}
353 
 
354 
/* Given an encoding, return the number of bytes the format occupies.
355 
   This is only defined for fixed-size encodings, and so does not
356 
   include leb128.  */
357 
 
358 
int
359 
size_of_encoded_value (int encoding)
360 
{
361 
  if (encoding == DW_EH_PE_omit)
362 
    return 0;
363 
 
364 
  switch (encoding & 0x07)
365 
    {
366 
    case DW_EH_PE_absptr:
367 
      return POINTER_SIZE / BITS_PER_UNIT;
368 
    case DW_EH_PE_udata2:
369 
      return 2;
370 
    case DW_EH_PE_udata4:
371 
      return 4;
372 
    case DW_EH_PE_udata8:
373 
      return 8;
374 
    default:
375 
      gcc_unreachable ();
376 
    }
377 
}
378 
 
379 
/* Yield a name for a given pointer encoding.  */
380 
 
381 
const char *
382 
eh_data_format_name (int format)
383 
{
384 
#if HAVE_DESIGNATED_INITIALIZERS
385 
#define S(p, v)         [p] = v,
386 
#else
387 
#define S(p, v)         case p: return v;
388 
#endif
389 
 
390 
#if HAVE_DESIGNATED_INITIALIZERS
391 
  __extension__ static const char * const format_names[256] = {
392 
#else
393 
  switch (format) {
394 
#endif
395 
 
396 
  S(DW_EH_PE_absptr, "absolute")
397 
  S(DW_EH_PE_omit, "omit")
398 
  S(DW_EH_PE_aligned, "aligned absolute")
399 
 
400 
  S(DW_EH_PE_uleb128, "uleb128")
401 
  S(DW_EH_PE_udata2, "udata2")
402 
  S(DW_EH_PE_udata4, "udata4")
403 
  S(DW_EH_PE_udata8, "udata8")
404 
  S(DW_EH_PE_sleb128, "sleb128")
405 
  S(DW_EH_PE_sdata2, "sdata2")
406 
  S(DW_EH_PE_sdata4, "sdata4")
407 
  S(DW_EH_PE_sdata8, "sdata8")
408 
 
409 
  S(DW_EH_PE_absptr | DW_EH_PE_pcrel, "pcrel")
410 
  S(DW_EH_PE_uleb128 | DW_EH_PE_pcrel, "pcrel uleb128")
411 
  S(DW_EH_PE_udata2 | DW_EH_PE_pcrel, "pcrel udata2")
412 
  S(DW_EH_PE_udata4 | DW_EH_PE_pcrel, "pcrel udata4")
413 
  S(DW_EH_PE_udata8 | DW_EH_PE_pcrel, "pcrel udata8")
414 
  S(DW_EH_PE_sleb128 | DW_EH_PE_pcrel, "pcrel sleb128")
415 
  S(DW_EH_PE_sdata2 | DW_EH_PE_pcrel, "pcrel sdata2")
416 
  S(DW_EH_PE_sdata4 | DW_EH_PE_pcrel, "pcrel sdata4")
417 
  S(DW_EH_PE_sdata8 | DW_EH_PE_pcrel, "pcrel sdata8")
418 
 
419 
  S(DW_EH_PE_absptr | DW_EH_PE_textrel, "textrel")
420 
  S(DW_EH_PE_uleb128 | DW_EH_PE_textrel, "textrel uleb128")
421 
  S(DW_EH_PE_udata2 | DW_EH_PE_textrel, "textrel udata2")
422 
  S(DW_EH_PE_udata4 | DW_EH_PE_textrel, "textrel udata4")
423 
  S(DW_EH_PE_udata8 | DW_EH_PE_textrel, "textrel udata8")
424 
  S(DW_EH_PE_sleb128 | DW_EH_PE_textrel, "textrel sleb128")
425 
  S(DW_EH_PE_sdata2 | DW_EH_PE_textrel, "textrel sdata2")
426 
  S(DW_EH_PE_sdata4 | DW_EH_PE_textrel, "textrel sdata4")
427 
  S(DW_EH_PE_sdata8 | DW_EH_PE_textrel, "textrel sdata8")
428 
 
429 
  S(DW_EH_PE_absptr | DW_EH_PE_datarel, "datarel")
430 
  S(DW_EH_PE_uleb128 | DW_EH_PE_datarel, "datarel uleb128")
431 
  S(DW_EH_PE_udata2 | DW_EH_PE_datarel, "datarel udata2")
432 
  S(DW_EH_PE_udata4 | DW_EH_PE_datarel, "datarel udata4")
433 
  S(DW_EH_PE_udata8 | DW_EH_PE_datarel, "datarel udata8")
434 
  S(DW_EH_PE_sleb128 | DW_EH_PE_datarel, "datarel sleb128")
435 
  S(DW_EH_PE_sdata2 | DW_EH_PE_datarel, "datarel sdata2")
436 
  S(DW_EH_PE_sdata4 | DW_EH_PE_datarel, "datarel sdata4")
437 
  S(DW_EH_PE_sdata8 | DW_EH_PE_datarel, "datarel sdata8")
438 
 
439 
  S(DW_EH_PE_absptr | DW_EH_PE_funcrel, "funcrel")
440 
  S(DW_EH_PE_uleb128 | DW_EH_PE_funcrel, "funcrel uleb128")
441 
  S(DW_EH_PE_udata2 | DW_EH_PE_funcrel, "funcrel udata2")
442 
  S(DW_EH_PE_udata4 | DW_EH_PE_funcrel, "funcrel udata4")
443 
  S(DW_EH_PE_udata8 | DW_EH_PE_funcrel, "funcrel udata8")
444 
  S(DW_EH_PE_sleb128 | DW_EH_PE_funcrel, "funcrel sleb128")
445 
  S(DW_EH_PE_sdata2 | DW_EH_PE_funcrel, "funcrel sdata2")
446 
  S(DW_EH_PE_sdata4 | DW_EH_PE_funcrel, "funcrel sdata4")
447 
  S(DW_EH_PE_sdata8 | DW_EH_PE_funcrel, "funcrel sdata8")
448 
 
449 
  S(DW_EH_PE_indirect | DW_EH_PE_absptr, "indirect absolute")
450 
 
451 
  S(DW_EH_PE_indirect | DW_EH_PE_absptr | DW_EH_PE_pcrel,
452 
    "indirect pcrel")
453 
  S(DW_EH_PE_indirect | DW_EH_PE_uleb128 | DW_EH_PE_pcrel,
454 
    "indirect pcrel uleb128")
455 
  S(DW_EH_PE_indirect | DW_EH_PE_udata2 | DW_EH_PE_pcrel,
456 
    "indirect pcrel udata2")
457 
  S(DW_EH_PE_indirect | DW_EH_PE_udata4 | DW_EH_PE_pcrel,
458 
    "indirect pcrel udata4")
459 
  S(DW_EH_PE_indirect | DW_EH_PE_udata8 | DW_EH_PE_pcrel,
460 
    "indirect pcrel udata8")
461 
  S(DW_EH_PE_indirect | DW_EH_PE_sleb128 | DW_EH_PE_pcrel,
462 
    "indirect pcrel sleb128")
463 
  S(DW_EH_PE_indirect | DW_EH_PE_sdata2 | DW_EH_PE_pcrel,
464 
    "indirect pcrel sdata2")
465 
  S(DW_EH_PE_indirect | DW_EH_PE_sdata4 | DW_EH_PE_pcrel,
466 
    "indirect pcrel sdata4")
467 
  S(DW_EH_PE_indirect | DW_EH_PE_sdata8 | DW_EH_PE_pcrel,
468 
    "indirect pcrel sdata8")
469 
 
470 
  S(DW_EH_PE_indirect | DW_EH_PE_absptr | DW_EH_PE_textrel,
471 
    "indirect textrel")
472 
  S(DW_EH_PE_indirect | DW_EH_PE_uleb128 | DW_EH_PE_textrel,
473 
    "indirect textrel uleb128")
474 
  S(DW_EH_PE_indirect | DW_EH_PE_udata2 | DW_EH_PE_textrel,
475 
    "indirect textrel udata2")
476 
  S(DW_EH_PE_indirect | DW_EH_PE_udata4 | DW_EH_PE_textrel,
477 
    "indirect textrel udata4")
478 
  S(DW_EH_PE_indirect | DW_EH_PE_udata8 | DW_EH_PE_textrel,
479 
    "indirect textrel udata8")
480 
  S(DW_EH_PE_indirect | DW_EH_PE_sleb128 | DW_EH_PE_textrel,
481 
    "indirect textrel sleb128")
482 
  S(DW_EH_PE_indirect | DW_EH_PE_sdata2 | DW_EH_PE_textrel,
483 
    "indirect textrel sdata2")
484 
  S(DW_EH_PE_indirect | DW_EH_PE_sdata4 | DW_EH_PE_textrel,
485 
    "indirect textrel sdata4")
486 
  S(DW_EH_PE_indirect | DW_EH_PE_sdata8 | DW_EH_PE_textrel,
487 
    "indirect textrel sdata8")
488 
 
489 
  S(DW_EH_PE_indirect | DW_EH_PE_absptr | DW_EH_PE_datarel,
490 
    "indirect datarel")
491 
  S(DW_EH_PE_indirect | DW_EH_PE_uleb128 | DW_EH_PE_datarel,
492 
    "indirect datarel uleb128")
493 
  S(DW_EH_PE_indirect | DW_EH_PE_udata2 | DW_EH_PE_datarel,
494 
    "indirect datarel udata2")
495 
  S(DW_EH_PE_indirect | DW_EH_PE_udata4 | DW_EH_PE_datarel,
496 
    "indirect datarel udata4")
497 
  S(DW_EH_PE_indirect | DW_EH_PE_udata8 | DW_EH_PE_datarel,
498 
    "indirect datarel udata8")
499 
  S(DW_EH_PE_indirect | DW_EH_PE_sleb128 | DW_EH_PE_datarel,
500 
    "indirect datarel sleb128")
501 
  S(DW_EH_PE_indirect | DW_EH_PE_sdata2 | DW_EH_PE_datarel,
502 
    "indirect datarel sdata2")
503 
  S(DW_EH_PE_indirect | DW_EH_PE_sdata4 | DW_EH_PE_datarel,
504 
    "indirect datarel sdata4")
505 
  S(DW_EH_PE_indirect | DW_EH_PE_sdata8 | DW_EH_PE_datarel,
506 
    "indirect datarel sdata8")
507 
 
508 
  S(DW_EH_PE_indirect | DW_EH_PE_absptr | DW_EH_PE_funcrel,
509 
    "indirect funcrel")
510 
  S(DW_EH_PE_indirect | DW_EH_PE_uleb128 | DW_EH_PE_funcrel,
511 
    "indirect funcrel uleb128")
512 
  S(DW_EH_PE_indirect | DW_EH_PE_udata2 | DW_EH_PE_funcrel,
513 
    "indirect funcrel udata2")
514 
  S(DW_EH_PE_indirect | DW_EH_PE_udata4 | DW_EH_PE_funcrel,
515 
    "indirect funcrel udata4")
516 
  S(DW_EH_PE_indirect | DW_EH_PE_udata8 | DW_EH_PE_funcrel,
517 
    "indirect funcrel udata8")
518 
  S(DW_EH_PE_indirect | DW_EH_PE_sleb128 | DW_EH_PE_funcrel,
519 
    "indirect funcrel sleb128")
520 
  S(DW_EH_PE_indirect | DW_EH_PE_sdata2 | DW_EH_PE_funcrel,
521 
    "indirect funcrel sdata2")
522 
  S(DW_EH_PE_indirect | DW_EH_PE_sdata4 | DW_EH_PE_funcrel,
523 
    "indirect funcrel sdata4")
524 
  S(DW_EH_PE_indirect | DW_EH_PE_sdata8 | DW_EH_PE_funcrel,
525 
    "indirect funcrel sdata8")
526 
 
527 
#if HAVE_DESIGNATED_INITIALIZERS
528 
  };
529 
 
530 
  gcc_assert (format >= 0 && format < 0x100 && format_names[format]);
531 
 
532 
  return format_names[format];
533 
#else
534 
  }
535 
  gcc_unreachable ();
536 
#endif
537 
}
538 
 
539 
/* Output an unsigned LEB128 quantity, but only the byte values.  */
540 
 
541 
void
542 
dw2_asm_output_data_uleb128_raw (unsigned HOST_WIDE_INT value)
543 
{
544 
  while (1)
545 
    {
546 
      int byte = (value & 0x7f);
547 
      value >>= 7;
548 
      if (value != 0)
549 
        /* More bytes to follow.  */
550 
        byte |= 0x80;
551 
 
552 
      fprintf (asm_out_file, "0x%x", byte);
553 
      if (value == 0)
554 
        break;
555 
      fputc (',', asm_out_file);
556 
    }
557 
}
558 
 
559 
/* Output an unsigned LEB128 quantity.  */
560 
 
561 
void
562 
dw2_asm_output_data_uleb128 (unsigned HOST_WIDE_INT value,
563 
                             const char *comment, ...)
564 
{
565 
  va_list ap;
566 
 
567 
  va_start (ap, comment);
568 
 
569 
#ifdef HAVE_AS_LEB128
570 
  fprintf (asm_out_file, "\t.uleb128 " HOST_WIDE_INT_PRINT_HEX , value);
571 
 
572 
  if (flag_debug_asm && comment)
573 
    {
574 
      fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START);
575 
      vfprintf (asm_out_file, comment, ap);
576 
    }
577 
#else
578 
  {
579 
    unsigned HOST_WIDE_INT work = value;
580 
    const char *byte_op = targetm.asm_out.byte_op;
581 
 
582 
    if (byte_op)
583 
      fputs (byte_op, asm_out_file);
584 
    do
585 
      {
586 
        int byte = (work & 0x7f);
587 
        work >>= 7;
588 
        if (work != 0)
589 
          /* More bytes to follow.  */
590 
          byte |= 0x80;
591 
 
592 
        if (byte_op)
593 
          {
594 
            fprintf (asm_out_file, "0x%x", byte);
595 
            if (work != 0)
596 
              fputc (',', asm_out_file);
597 
          }
598 
        else
599 
          assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1);
600 
      }
601 
    while (work != 0);
602 
 
603 
  if (flag_debug_asm)
604 
    {
605 
      fprintf (asm_out_file, "\t%s uleb128 " HOST_WIDE_INT_PRINT_HEX,
606 
               ASM_COMMENT_START, value);
607 
      if (comment)
608 
        {
609 
          fputs ("; ", asm_out_file);
610 
          vfprintf (asm_out_file, comment, ap);
611 
        }
612 
    }
613 
  }
614 
#endif
615 
  fputc ('\n', asm_out_file);
616 
 
617 
  va_end (ap);
618 
}
619 
 
620 
/* Output an signed LEB128 quantity, but only the byte values.  */
621 
 
622 
void
623 
dw2_asm_output_data_sleb128_raw (HOST_WIDE_INT value)
624 
{
625 
  int byte, more;
626 
 
627 
  while (1)
628 
    {
629 
      byte = (value & 0x7f);
630 
      value >>= 7;
631 
      more = !((value == 0 && (byte & 0x40) == 0)
632 
                || (value == -1 && (byte & 0x40) != 0));
633 
      if (more)
634 
        byte |= 0x80;
635 
 
636 
      fprintf (asm_out_file, "0x%x", byte);
637 
      if (!more)
638 
        break;
639 
      fputc (',', asm_out_file);
640 
    }
641 
}
642 
 
643 
/* Output a signed LEB128 quantity.  */
644 
 
645 
void
646 
dw2_asm_output_data_sleb128 (HOST_WIDE_INT value,
647 
                             const char *comment, ...)
648 
{
649 
  va_list ap;
650 
 
651 
  va_start (ap, comment);
652 
 
653 
#ifdef HAVE_AS_LEB128
654 
  fprintf (asm_out_file, "\t.sleb128 " HOST_WIDE_INT_PRINT_DEC, value);
655 
 
656 
  if (flag_debug_asm && comment)
657 
    {
658 
      fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START);
659 
      vfprintf (asm_out_file, comment, ap);
660 
    }
661 
#else
662 
  {
663 
    HOST_WIDE_INT work = value;
664 
    int more, byte;
665 
    const char *byte_op = targetm.asm_out.byte_op;
666 
 
667 
    if (byte_op)
668 
      fputs (byte_op, asm_out_file);
669 
    do
670 
      {
671 
        byte = (work & 0x7f);
672 
        /* arithmetic shift */
673 
        work >>= 7;
674 
        more = !((work == 0 && (byte & 0x40) == 0)
675 
                 || (work == -1 && (byte & 0x40) != 0));
676 
        if (more)
677 
          byte |= 0x80;
678 
 
679 
        if (byte_op)
680 
          {
681 
            fprintf (asm_out_file, "0x%x", byte);
682 
            if (more)
683 
              fputc (',', asm_out_file);
684 
          }
685 
        else
686 
          assemble_integer (GEN_INT (byte), 1, BITS_PER_UNIT, 1);
687 
      }
688 
    while (more);
689 
 
690 
  if (flag_debug_asm)
691 
    {
692 
      fprintf (asm_out_file, "\t%s sleb128 " HOST_WIDE_INT_PRINT_DEC,
693 
               ASM_COMMENT_START, value);
694 
      if (comment)
695 
        {
696 
          fputs ("; ", asm_out_file);
697 
          vfprintf (asm_out_file, comment, ap);
698 
        }
699 
    }
700 
  }
701 
#endif
702 
  fputc ('\n', asm_out_file);
703 
 
704 
  va_end (ap);
705 
}
706 
 
707 
void
708 
dw2_asm_output_delta_uleb128 (const char *lab1 ATTRIBUTE_UNUSED,
709 
                              const char *lab2 ATTRIBUTE_UNUSED,
710 
                              const char *comment, ...)
711 
{
712 
  va_list ap;
713 
 
714 
  va_start (ap, comment);
715 
 
716 
#ifdef HAVE_AS_LEB128
717 
  fputs ("\t.uleb128 ", asm_out_file);
718 
  assemble_name (asm_out_file, lab1);
719 
  fputc ('-', asm_out_file);
720 
  assemble_name (asm_out_file, lab2);
721 
#else
722 
  gcc_unreachable ();
723 
#endif
724 
 
725 
  if (flag_debug_asm && comment)
726 
    {
727 
      fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START);
728 
      vfprintf (asm_out_file, comment, ap);
729 
    }
730 
  fputc ('\n', asm_out_file);
731 
 
732 
  va_end (ap);
733 
}
734 
 
735 
#if 0
736 
 
737 
void
738 
dw2_asm_output_delta_sleb128 (const char *lab1 ATTRIBUTE_UNUSED,
739 
                              const char *lab2 ATTRIBUTE_UNUSED,
740 
                              const char *comment, ...)
741 
{
742 
  va_list ap;
743 
 
744 
  va_start (ap, comment);
745 
 
746 
#ifdef HAVE_AS_LEB128
747 
  fputs ("\t.sleb128 ", asm_out_file);
748 
  assemble_name (asm_out_file, lab1);
749 
  fputc ('-', asm_out_file);
750 
  assemble_name (asm_out_file, lab2);
751 
#else
752 
  gcc_unreachable ();
753 
#endif
754 
 
755 
  if (flag_debug_asm && comment)
756 
    {
757 
      fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START);
758 
      vfprintf (asm_out_file, comment, ap);
759 
    }
760 
  fputc ('\n', asm_out_file);
761 
 
762 
  va_end (ap);
763 
}
764 
#endif /* 0 */
765 
 
766 
static int dw2_output_indirect_constant_1 (splay_tree_node, void *);
767 
 
768 
static GTY((param1_is (char *), param2_is (tree))) splay_tree indirect_pool;
769 
 
770 
static GTY(()) int dw2_const_labelno;
771 
 
772 
#if defined(HAVE_GAS_HIDDEN) && defined(SUPPORTS_ONE_ONLY)
773 
# define USE_LINKONCE_INDIRECT 1
774 
#else
775 
# define USE_LINKONCE_INDIRECT 0
776 
#endif
777 
 
778 
/* Comparison function for a splay tree in which the keys are strings.
779 
   K1 and K2 have the dynamic type "const char *".  Returns <0, 0, or
780 
   >0 to indicate whether K1 is less than, equal to, or greater than
781 
   K2, respectively.  */
782 
 
783 
static int
784 
splay_tree_compare_strings (splay_tree_key k1, splay_tree_key k2)
785 
{
786 
  const char *s1 = (const char *)k1;
787 
  const char *s2 = (const char *)k2;
788 
  int ret;
789 
 
790 
  if (s1 == s2)
791 
    return 0;
792 
 
793 
  ret = strcmp (s1, s2);
794 
 
795 
  /* The strings are always those from IDENTIFIER_NODEs, and,
796 
     therefore, we should never have two copies of the same
797 
     string.  */
798 
  gcc_assert (ret);
799 
 
800 
  return ret;
801 
}
802 
 
803 
/* Put X, a SYMBOL_REF, in memory.  Return a SYMBOL_REF to the allocated
804 
   memory.  Differs from force_const_mem in that a single pool is used for
805 
   the entire unit of translation, and the memory is not guaranteed to be
806 
   "near" the function in any interesting sense.  IS_PUBLIC controls whether
807 
   the symbol can be shared across the entire application (or DSO).  */
808 
 
809 
rtx
810 
dw2_force_const_mem (rtx x, bool is_public)
811 
{
812 
  splay_tree_node node;
813 
  const char *key;
814 
  tree decl_id;
815 
 
816 
  if (! indirect_pool)
817 
    /* We use strcmp, rather than just comparing pointers, so that the
818 
       sort order will not depend on the host system.  */
819 
    indirect_pool = splay_tree_new_ggc (splay_tree_compare_strings);
820 
 
821 
  gcc_assert (GET_CODE (x) == SYMBOL_REF);
822 
 
823 
  key = XSTR (x, 0);
824 
  node = splay_tree_lookup (indirect_pool, (splay_tree_key) key);
825 
  if (node)
826 
    decl_id = (tree) node->value;
827 
  else
828 
    {
829 
      tree id;
830 
      const char *str = targetm.strip_name_encoding (key);
831 
 
832 
      if (is_public && USE_LINKONCE_INDIRECT)
833 
        {
834 
          char *ref_name = XALLOCAVEC (char, strlen (str) + sizeof "DW.ref.");
835 
 
836 
          sprintf (ref_name, "DW.ref.%s", str);
837 
          gcc_assert (!maybe_get_identifier (ref_name));
838 
          decl_id = get_identifier (ref_name);
839 
          TREE_PUBLIC (decl_id) = 1;
840 
        }
841 
      else
842 
        {
843 
          char label[32];
844 
 
845 
          ASM_GENERATE_INTERNAL_LABEL (label, "LDFCM", dw2_const_labelno);
846 
          ++dw2_const_labelno;
847 
          gcc_assert (!maybe_get_identifier (label));
848 
          decl_id = get_identifier (label);
849 
        }
850 
 
851 
      id = maybe_get_identifier (str);
852 
      if (id)
853 
        TREE_SYMBOL_REFERENCED (id) = 1;
854 
 
855 
      splay_tree_insert (indirect_pool, (splay_tree_key) key,
856 
                         (splay_tree_value) decl_id);
857 
    }
858 
 
859 
  return gen_rtx_SYMBOL_REF (Pmode, IDENTIFIER_POINTER (decl_id));
860 
}
861 
 
862 
/* A helper function for dw2_output_indirect_constants called through
863 
   splay_tree_foreach.  Emit one queued constant to memory.  */
864 
 
865 
static int
866 
dw2_output_indirect_constant_1 (splay_tree_node node,
867 
                                void *data ATTRIBUTE_UNUSED)
868 
{
869 
  const char *sym;
870 
  rtx sym_ref;
871 
  tree id, decl;
872 
 
873 
  sym = (const char *) node->key;
874 
  id = (tree) node->value;
875 
 
876 
  decl = build_decl (UNKNOWN_LOCATION, VAR_DECL, id, ptr_type_node);
877 
  DECL_ARTIFICIAL (decl) = 1;
878 
  DECL_IGNORED_P (decl) = 1;
879 
  DECL_INITIAL (decl) = decl;
880 
  TREE_READONLY (decl) = 1;
881 
 
882 
  if (TREE_PUBLIC (id))
883 
    {
884 
      TREE_PUBLIC (decl) = 1;
885 
      make_decl_one_only (decl, DECL_ASSEMBLER_NAME (decl));
886 
    }
887 
  else
888 
    TREE_STATIC (decl) = 1;
889 
 
890 
  sym_ref = gen_rtx_SYMBOL_REF (Pmode, sym);
891 
  sym = targetm.strip_name_encoding (sym);
892 
  if (TREE_PUBLIC (decl) && USE_LINKONCE_INDIRECT)
893 
    fprintf (asm_out_file, "\t.hidden %sDW.ref.%s\n", user_label_prefix, sym);
894 
  assemble_variable (decl, 1, 1, 1);
895 
  assemble_integer (sym_ref, POINTER_SIZE / BITS_PER_UNIT, POINTER_SIZE, 1);
896 
 
897 
  return 0;
898 
}
899 
 
900 
/* Emit the constants queued through dw2_force_const_mem.  */
901 
 
902 
void
903 
dw2_output_indirect_constants (void)
904 
{
905 
  if (indirect_pool)
906 
    splay_tree_foreach (indirect_pool, dw2_output_indirect_constant_1, NULL);
907 
}
908 
 
909 
/* Like dw2_asm_output_addr_rtx, but encode the pointer as directed.
910 
   If PUBLIC is set and the encoding is DW_EH_PE_indirect, the indirect
911 
   reference is shared across the entire application (or DSO).  */
912 
 
913 
void
914 
dw2_asm_output_encoded_addr_rtx (int encoding, rtx addr, bool is_public,
915 
                                 const char *comment, ...)
916 
{
917 
  int size;
918 
  va_list ap;
919 
 
920 
  va_start (ap, comment);
921 
 
922 
  size = size_of_encoded_value (encoding);
923 
 
924 
  if (encoding == DW_EH_PE_aligned)
925 
    {
926 
      assemble_align (POINTER_SIZE);
927 
      assemble_integer (addr, size, POINTER_SIZE, 1);
928 
      return;
929 
    }
930 
 
931 
  /* NULL is _always_ represented as a plain zero, as is 1 for Ada's
932 
     "all others".  */
933 
  if (addr == const0_rtx || addr == const1_rtx)
934 
    assemble_integer (addr, size, BITS_PER_UNIT, 1);
935 
  else
936 
    {
937 
    restart:
938 
      /* Allow the target first crack at emitting this.  Some of the
939 
         special relocations require special directives instead of
940 
         just ".4byte" or whatever.  */
941 
#ifdef ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX
942 
      ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX (asm_out_file, encoding, size,
943 
                                         addr, done);
944 
#endif
945 
 
946 
      /* Indirection is used to get dynamic relocations out of a
947 
         read-only section.  */
948 
      if (encoding & DW_EH_PE_indirect)
949 
        {
950 
          /* It is very tempting to use force_const_mem so that we share data
951 
             with the normal constant pool.  However, we've already emitted
952 
             the constant pool for this function.  Moreover, we'd like to
953 
             share these constants across the entire unit of translation and
954 
             even, if possible, across the entire application (or DSO).  */
955 
          addr = dw2_force_const_mem (addr, is_public);
956 
          encoding &= ~DW_EH_PE_indirect;
957 
          goto restart;
958 
        }
959 
 
960 
      switch (encoding & 0xF0)
961 
        {
962 
        case DW_EH_PE_absptr:
963 
          dw2_assemble_integer (size, addr);
964 
          break;
965 
 
966 
        case DW_EH_PE_pcrel:
967 
          gcc_assert (GET_CODE (addr) == SYMBOL_REF);
968 
#ifdef ASM_OUTPUT_DWARF_PCREL
969 
          ASM_OUTPUT_DWARF_PCREL (asm_out_file, size, XSTR (addr, 0));
970 
#else
971 
          dw2_assemble_integer (size, gen_rtx_MINUS (Pmode, addr, pc_rtx));
972 
#endif
973 
          break;
974 
 
975 
        default:
976 
          /* Other encodings should have been handled by
977 
             ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX.  */
978 
          gcc_unreachable ();
979 
        }
980 
 
981 
#ifdef ASM_MAYBE_OUTPUT_ENCODED_ADDR_RTX
982 
    done:;
983 
#endif
984 
    }
985 
 
986 
  if (flag_debug_asm && comment)
987 
    {
988 
      fprintf (asm_out_file, "\t%s ", ASM_COMMENT_START);
989 
      vfprintf (asm_out_file, comment, ap);
990 
    }
991 
  fputc ('\n', asm_out_file);
992 
 
993 
  va_end (ap);
994 
}
995 
 
996 
#include "gt-dwarf2asm.h"

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