OpenCores
URL https://opencores.org/ocsvn/openrisc_me/openrisc_me/trunk

Subversion Repositories openrisc_me

[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [bfd/] [elf32-cr16c.c] - Blame information for rev 174

Go to most recent revision | Details | Compare with Previous | View Log

Line No. Rev Author Line
1 24 jeremybenn 
/* BFD back-end for National Semiconductor's CR16C ELF
2 
   Copyright 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
3 
 
4 
   This file is part of BFD, the Binary File Descriptor library.
5 
 
6 
   This program 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 3 of the License, or
9 
   (at your option) any later version.
10 
 
11 
   This program 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.
15 
 
16 
   You should have received a copy of the GNU General Public License
17 
   along with this program; if not, write to the Free Software
18 
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
19 
   MA 02110-1301, USA.  */
20 
 
21 
#include "sysdep.h"
22 
#include "bfd.h"
23 
#include "libbfd.h"
24 
#include "bfdlink.h"
25 
#include "elf/cr16c.h"
26 
#include "elf-bfd.h"
27 
 
28 
 
29 
#define USE_REL 1       /* CR16C uses REL relocations instead of RELA.  */
30 
 
31 
/* The following definition is based on EMPTY_HOWTO macro,
32 
   but also initiates the "name" field in HOWTO struct.  */
33 
#define ONLY_NAME_HOWTO(C) \
34 
  HOWTO ((C), 0, 0, 0, FALSE, 0, complain_overflow_dont, NULL, \
35 
          STRINGX(C), FALSE, 0, 0, FALSE)
36 
 
37 
/* reloc_map_index array maps CRASM relocation type into a BFD
38 
   relocation enum. The array's indices are synchronized with
39 
   RINDEX_16C_* indices, created in include/elf/cr16c.h.
40 
   The array is used in:
41 
   1. elf32-cr16c.c : elf_cr16c_reloc_type_lookup().
42 
   2. asreloc.c : find_reloc_type(). */
43 
 
44 
RELOC_MAP reloc_map_index[RINDEX_16C_MAX] =
45 
{
46 
  {R_16C_NUM08,     BFD_RELOC_16C_NUM08},
47 
  {R_16C_NUM08_C,   BFD_RELOC_16C_NUM08_C},
48 
  {R_16C_NUM16,     BFD_RELOC_16C_NUM16},
49 
  {R_16C_NUM16_C,   BFD_RELOC_16C_NUM16_C},
50 
  {R_16C_NUM32,     BFD_RELOC_16C_NUM32},
51 
  {R_16C_NUM32_C,   BFD_RELOC_16C_NUM32_C},
52 
  {R_16C_DISP04,    BFD_RELOC_16C_DISP04},
53 
  {R_16C_DISP04_C,  BFD_RELOC_16C_DISP04_C},
54 
  {R_16C_DISP08,    BFD_RELOC_16C_DISP08},
55 
  {R_16C_DISP08_C,  BFD_RELOC_16C_DISP08_C},
56 
  {R_16C_DISP16,    BFD_RELOC_16C_DISP16},
57 
  {R_16C_DISP16_C,  BFD_RELOC_16C_DISP16_C},
58 
  {R_16C_DISP24,    BFD_RELOC_16C_DISP24},
59 
  {R_16C_DISP24_C,  BFD_RELOC_16C_DISP24_C},
60 
  {R_16C_DISP24a,   BFD_RELOC_16C_DISP24a},
61 
  {R_16C_DISP24a_C, BFD_RELOC_16C_DISP24a_C},
62 
  {R_16C_REG04,     BFD_RELOC_16C_REG04},
63 
  {R_16C_REG04_C,   BFD_RELOC_16C_REG04_C},
64 
  {R_16C_REG04a,    BFD_RELOC_16C_REG04a},
65 
  {R_16C_REG04a_C,  BFD_RELOC_16C_REG04a_C},
66 
  {R_16C_REG14,     BFD_RELOC_16C_REG14},
67 
  {R_16C_REG14_C,   BFD_RELOC_16C_REG14_C},
68 
  {R_16C_REG16,     BFD_RELOC_16C_REG16},
69 
  {R_16C_REG16_C,   BFD_RELOC_16C_REG16_C},
70 
  {R_16C_REG20,     BFD_RELOC_16C_REG20},
71 
  {R_16C_REG20_C,   BFD_RELOC_16C_REG20_C},
72 
  {R_16C_ABS20,     BFD_RELOC_16C_ABS20},
73 
  {R_16C_ABS20_C,   BFD_RELOC_16C_ABS20_C},
74 
  {R_16C_ABS24,     BFD_RELOC_16C_ABS24},
75 
  {R_16C_ABS24_C,   BFD_RELOC_16C_ABS24_C},
76 
  {R_16C_IMM04,     BFD_RELOC_16C_IMM04},
77 
  {R_16C_IMM04_C,   BFD_RELOC_16C_IMM04_C},
78 
  {R_16C_IMM16,     BFD_RELOC_16C_IMM16},
79 
  {R_16C_IMM16_C,   BFD_RELOC_16C_IMM16_C},
80 
  {R_16C_IMM20,     BFD_RELOC_16C_IMM20},
81 
  {R_16C_IMM20_C,   BFD_RELOC_16C_IMM20_C},
82 
  {R_16C_IMM24,     BFD_RELOC_16C_IMM24},
83 
  {R_16C_IMM24_C,   BFD_RELOC_16C_IMM24_C},
84 
  {R_16C_IMM32,     BFD_RELOC_16C_IMM32},
85 
  {R_16C_IMM32_C,   BFD_RELOC_16C_IMM32_C}
86 
};
87 
 
88 
static reloc_howto_type elf_howto_table[] =
89 
{
90 
  /* 00 */ ONLY_NAME_HOWTO (RINDEX_16C_NUM08),
91 
  /* 01 */ ONLY_NAME_HOWTO (RINDEX_16C_NUM08_C),
92 
  /* 02 */ ONLY_NAME_HOWTO (RINDEX_16C_NUM16),
93 
  /* 03 */ ONLY_NAME_HOWTO (RINDEX_16C_NUM16_C),
94 
  /* 04 */ ONLY_NAME_HOWTO (RINDEX_16C_NUM32),
95 
  /* 05 */ ONLY_NAME_HOWTO (RINDEX_16C_NUM32_C),
96 
  /* 06 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP04),
97 
  /* 07 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP04_C),
98 
  /* 08 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP08),
99 
  /* 09 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP08_C),
100 
  /* 10 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP16),
101 
  /* 11 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP16_C),
102 
  /* 12 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP24),
103 
  /* 13 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP24_C),
104 
  /* 14 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP24a),
105 
  /* 15 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP24a_C),
106 
  /* 16 */ ONLY_NAME_HOWTO (RINDEX_16C_REG04),
107 
  /* 17 */ ONLY_NAME_HOWTO (RINDEX_16C_REG04_C),
108 
  /* 18 */ ONLY_NAME_HOWTO (RINDEX_16C_REG04a),
109 
  /* 19 */ ONLY_NAME_HOWTO (RINDEX_16C_REG04a_C),
110 
  /* 20 */ ONLY_NAME_HOWTO (RINDEX_16C_REG14),
111 
  /* 21 */ ONLY_NAME_HOWTO (RINDEX_16C_REG14_C),
112 
  /* 22 */ ONLY_NAME_HOWTO (RINDEX_16C_REG16),
113 
  /* 23 */ ONLY_NAME_HOWTO (RINDEX_16C_REG16_C),
114 
  /* 24 */ ONLY_NAME_HOWTO (RINDEX_16C_REG20),
115 
  /* 25 */ ONLY_NAME_HOWTO (RINDEX_16C_REG20_C),
116 
  /* 26 */ ONLY_NAME_HOWTO (RINDEX_16C_ABS20),
117 
  /* 27 */ ONLY_NAME_HOWTO (RINDEX_16C_ABS20_C),
118 
  /* 28 */ ONLY_NAME_HOWTO (RINDEX_16C_ABS24),
119 
  /* 29 */ ONLY_NAME_HOWTO (RINDEX_16C_ABS24_C),
120 
  /* 30 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM04),
121 
  /* 31 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM04_C),
122 
  /* 32 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM16),
123 
  /* 33 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM16_C),
124 
  /* 34 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM20),
125 
  /* 35 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM20_C),
126 
  /* 36 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM24),
127 
  /* 37 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM24_C),
128 
  /* 38 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM32),
129 
  /* 39 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM32_C)
130 
};
131 
 
132 
 
133 
/* Code to turn a code_type into a howto ptr, uses the above howto table.  */
134 
 
135 
static reloc_howto_type *
136 
elf_cr16c_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
137 
                             bfd_reloc_code_real_type code)
138 
{
139 
  unsigned int i;
140 
 
141 
  for (i = 0; i < RINDEX_16C_MAX; i++)
142 
    {
143 
      if (code == reloc_map_index[i].bfd_reloc_enum)
144 
        {
145 
          /* printf ("CR16C Relocation Type is - %x\n", code); */
146 
          return & elf_howto_table[i];
147 
        }
148 
    }
149 
 
150 
  /* printf ("This relocation Type is not supported - %x\n", code); */
151 
  return 0;
152 
}
153 
 
154 
static reloc_howto_type *
155 
elf_cr16c_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
156 
                             const char *r_name)
157 
{
158 
  unsigned int i;
159 
 
160 
  for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
161 
    if (elf_howto_table[i].name != NULL
162 
        && strcasecmp (elf_howto_table[i].name, r_name) == 0)
163 
      return &elf_howto_table[i];
164 
 
165 
  return NULL;
166 
}
167 
 
168 
static void
169 
elf_cr16c_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
170 
                         arelent *cache_ptr ATTRIBUTE_UNUSED,
171 
                         Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
172 
{
173 
  abort ();
174 
}
175 
 
176 
static void
177 
elf_cr16c_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
178 
                             arelent *cache_ptr,
179 
                             Elf_Internal_Rela *dst)
180 
{
181 
  unsigned int r_type = ELF32_R_TYPE (dst->r_info);
182 
 
183 
  BFD_ASSERT (r_type < (unsigned int) RINDEX_16C_MAX);
184 
  cache_ptr->howto = &elf_howto_table[r_type];
185 
}
186 
 
187 
/* Perform a relocation as part of a final link.  */
188 
 
189 
static bfd_reloc_status_type
190 
cr16c_elf_final_link_relocate (reloc_howto_type *howto,
191 
                               bfd *abfd,
192 
                               bfd *output_bfd ATTRIBUTE_UNUSED,
193 
                               asection *input_section,
194 
                               bfd_byte *data,
195 
                               bfd_vma octets,
196 
                               bfd_vma Rvalue,
197 
                               bfd_vma addend ATTRIBUTE_UNUSED,
198 
                               struct bfd_link_info *info ATTRIBUTE_UNUSED,
199 
                               asection *sym_sec ATTRIBUTE_UNUSED,
200 
                               int is_local ATTRIBUTE_UNUSED)
201 
{
202 
  long value;
203 
  short sword;                  /* Extracted from the hole and put back.  */
204 
  unsigned long format, addr_type, code_factor;
205 
  unsigned short size;
206 
  unsigned short r_type;
207 
  asymbol *symbol = NULL;
208 
 
209 
  unsigned long disp20_opcod;
210 
  char neg = 0;
211 
  char neg2pos = 0;
212 
 
213 
  long left_val = 0;
214 
  long plus_factor = 0;          /* To be added to the hole.  */
215 
 
216 
#define MIN_BYTE        ((int) 0xFFFFFF80)
217 
#define MIN_WORD        ((int) 0xFFFF8000)
218 
#define MAX_UWORD       ((unsigned) 0x0000FFFF)
219 
#define MAX_UBYTE       ((unsigned) 0x000000FF)
220 
 
221 
  r_type = reloc_map_index[howto->type].cr_reloc_type;
222 
  format = r_type & R_FORMAT;
223 
  size = r_type & R_SIZESP;
224 
  addr_type = r_type & R_ADDRTYPE;
225 
  code_factor = ((addr_type == R_CODE_ADDR) ? 1 : 0);
226 
 
227 
  if (sym_sec)
228 
    symbol = sym_sec->symbol;
229 
 
230 
  switch (format)
231 
    {
232 
    case R_NUMBER:
233 
      switch (size)
234 
        {
235 
        case R_S_16C_08:        /* One byte.  */
236 
          value = bfd_get_8 (abfd, (char *) data + octets);
237 
          break;
238 
        case R_S_16C_16:        /* Two bytes. */
239 
          sword = bfd_get_16 (abfd, (bfd_byte *) data + octets);
240 
          value = sword;
241 
          break;
242 
        case R_S_16C_32:        /* Four bytes.  */
243 
          value = bfd_get_32 (abfd, (bfd_byte *) data + octets);
244 
          break;
245 
        default:
246 
          return bfd_reloc_notsupported;
247 
        }
248 
      break;
249 
 
250 
    case R_16C_DISPL:
251 
      switch (size)
252 
        {
253 
        case R_S_16C_04:    /* word1(4-7).  */
254 
          value = bfd_get_8 (abfd, (char *) data + octets);
255 
          left_val = value & 0xF;
256 
          value = (value & 0xF0) >> 4;
257 
          value++;
258 
          value <<= 1;
259 
          break;
260 
        case R_S_16C_08:    /* word1(0-3,8-11).  */
261 
          sword = bfd_get_16 (abfd, (char *) data + octets);
262 
          value = sword & 0x000F;
263 
          value |= ((sword & 0x0F00) >> 4);
264 
          left_val = sword & 0xF0F0;
265 
          value <<= 1;
266 
          if (value & 0x100)
267 
            value |= 0xFFFFFF00;
268 
          break;
269 
        case R_S_16C_16:    /* word2.  */
270 
          sword = bfd_get_16 (abfd, (bfd_byte *) data + octets);
271 
          value = sword;
272 
          value = ((value & 0xFFFE) >> 1) | ((value & 0x1) << 15);
273 
          value <<= 1;
274 
          if (value & 0x10000)
275 
            value |= 0xFFFF0000;
276 
          break;
277 
        case R_S_16C_24_a:      /* word1(0-7),word2.  */
278 
          value = bfd_get_32 (abfd, (bfd_byte *) data + octets);
279 
          left_val = value & 0x0000FF00;
280 
          value = ((value & 0xFFFE0000) >> 17) |
281 
            ((value & 0x00010000) << 7) | ((value & 0x000000FF) << 15);
282 
          value <<= 1;
283 
          if (value & 0x1000000)
284 
            value |= 0xFE000000;
285 
          break;
286 
        case R_S_16C_24:    /* word2(0-3,8-11),word3.  */
287 
          value = bfd_get_32 (abfd, (bfd_byte *) data + octets);
288 
          left_val = value & 0x0000F0F0;
289 
          value = ((value >> 16) & 0x0000FFFF) |
290 
            ((value & 0x00000F00) << 8) | ((value & 0x0000000F) << 20);
291 
 
292 
          value = ((value & 0x00FFFFFE) >> 1) | ((value & 0x00000001) << 23);
293 
 
294 
          value <<= 1;
295 
          if (value & 0x1000000)
296 
            value |= 0xFE000000;
297 
          break;
298 
        default:
299 
          return bfd_reloc_notsupported;
300 
        }
301 
      break;
302 
 
303 
    case R_16C_REGREL:
304 
      switch (size)
305 
        {
306 
        case R_S_16C_04:    /* word1(12-15) not scaled.  */
307 
          value = bfd_get_8 (abfd, (char *) data + octets);
308 
          left_val = value & 0xF0;
309 
          value = value & 0xF;
310 
          break;
311 
        case R_S_16C_04_a:      /* word1(12-15) scaled by 2.  */
312 
          value = bfd_get_8 (abfd, (char *) data + octets);
313 
          left_val = value & 0xF0;
314 
          value = value & 0xF;
315 
          value <<= 1;
316 
          break;
317 
        case R_S_16C_14:    /* word1(4-5),word2(0-3,8-15).  */
318 
          value = bfd_get_32 (abfd, (bfd_byte *) data + octets);
319 
          left_val = value & 0x00F0FFCF;
320 
          value = ((value & 0xc0000000) >> 24) |
321 
            ((value & 0x3F000000) >> 16) |
322 
            ((value & 0x000F0000) >> 16) | (value & 0x00000030);
323 
          break;
324 
        case R_S_16C_16:    /* word2.  */
325 
          sword = bfd_get_16 (abfd, (bfd_byte *) data + octets);
326 
          value = sword;
327 
          break;
328 
        case R_S_16C_20:    /* word2(8-11),word3.  */
329 
          value = bfd_get_32 (abfd, (bfd_byte *) data + octets);
330 
          left_val = value & 0xF0;
331 
          value = (value & 0xF) << 16;
332 
          sword = bfd_get_16 (abfd, (bfd_byte *) data + octets + 1);
333 
          value = value | (unsigned short) sword;
334 
          disp20_opcod = bfd_get_32 (abfd, (bfd_byte *) data + octets - 3);
335 
          disp20_opcod |= 0x0FFF0000;
336 
          if ((disp20_opcod == 0x4FFF0018) ||   /* loadb -disp20(reg) */
337 
              (disp20_opcod == 0x5FFF0018) ||   /* loadb -disp20(rp)  */
338 
              (disp20_opcod == 0x8FFF0018) ||   /* loadd -disp20(reg) */
339 
              (disp20_opcod == 0x9FFF0018) ||   /* loadd -disp20(rp)  */
340 
              (disp20_opcod == 0xCFFF0018) ||   /* loadw -disp20(reg) */
341 
              (disp20_opcod == 0xDFFF0018) ||   /* loadw -disp20(rp)  */
342 
              (disp20_opcod == 0x4FFF0019) ||   /* storb -disp20(reg) */
343 
              (disp20_opcod == 0x5FFF0019) ||   /* storb -disp20(rp)  */
344 
              (disp20_opcod == 0x8FFF0019) ||   /* stord -disp20(reg) */
345 
              (disp20_opcod == 0x9FFF0019) ||   /* stord -disp20(rp)  */
346 
              (disp20_opcod == 0xCFFF0019) ||   /* storw -disp20(reg) */
347 
              (disp20_opcod == 0xDFFF0019))
348 
            {   /* storw -disp20(rp).  */
349 
              neg = 1;
350 
              value |= 0xFFF00000;
351 
            }
352 
 
353 
          break;
354 
        default:
355 
          return bfd_reloc_notsupported;
356 
        }
357 
      break;
358 
 
359 
    case R_16C_ABS:
360 
      switch (size)
361 
        {
362 
        case R_S_16C_20:    /* word1(0-3),word2.  */
363 
          value = bfd_get_32 (abfd, (bfd_byte *) data + octets);
364 
          left_val = value & 0x0000FFF0;
365 
          value = ((value & 0xFFFF0000) >> 16) |
366 
            ((value & 0x0000000F) << 16);
367 
          break;
368 
        case R_S_16C_24:   /* word2(0-3,8-11),word3.  */
369 
          value = bfd_get_32 (abfd, (bfd_byte *) data + octets);
370 
          left_val = value & 0x0000F0F0;
371 
          value = ((value & 0xFFFF0000) >> 16) |
372 
            ((value & 0x00000F00) << 8) | ((value & 0x0000000F) << 20);
373 
          break;
374 
        default:
375 
          return bfd_reloc_notsupported;
376 
        }
377 
      break;
378 
 
379 
    case R_16C_IMMED:
380 
      switch (size)
381 
        {
382 
        case R_S_16C_04:    /* word1/2(4-7).  */
383 
          value = bfd_get_8 (abfd, (char *) data + octets);
384 
          left_val = value & 0xF;
385 
          value = (value & 0xF0) >> 4;
386 
          break;
387 
        case R_S_16C_16:    /* word2.  */
388 
          sword = bfd_get_16 (abfd, (bfd_byte *) data + octets);
389 
          value = sword;
390 
          break;
391 
        case R_S_16C_20:    /* word1(0-3),word2.  */
392 
          value = bfd_get_32 (abfd, (bfd_byte *) data + octets);
393 
          left_val = value & 0x0000FFF0;
394 
          value = ((value & 0xFFFF0000) >> 16) |
395 
            ((value & 0x0000000F) << 16);
396 
          break;
397 
        case R_S_16C_32:    /* word2, word3.  */
398 
          value = bfd_get_32 (abfd, (bfd_byte *) data + octets);
399 
          value = ((value & 0x0000FFFF) << 16) |
400 
            ((value & 0xFFFF0000) >> 16);
401 
          break;
402 
        default:
403 
          return bfd_reloc_notsupported;
404 
        }
405 
      break;
406 
    default:
407 
      return bfd_reloc_notsupported;
408 
    }
409 
 
410 
  switch ((r_type & R_RELTO) >> 4)
411 
    {
412 
 
413 
    case 0:      /* R_ABS.  */
414 
      plus_factor = Rvalue;
415 
      break;
416 
    case 1:     /* R_PCREL.  */
417 
      plus_factor = Rvalue -
418 
        (input_section->output_section->vma + input_section->output_offset);
419 
      break;
420 
    default:
421 
      return bfd_reloc_notsupported;
422 
    }
423 
 
424 
  if (neg)
425 
    {
426 
      if (plus_factor >= -value)
427 
        neg2pos = 1;
428 
      /* We need to change load/stor with negative
429 
         displ opcode to positive disp opcode (CR16C).  */
430 
    }
431 
 
432 
  value = value + (plus_factor >> code_factor);
433 
 
434 
  switch (format)
435 
    {
436 
    case R_NUMBER:
437 
      switch (size)
438 
        {
439 
        case R_S_16C_08:        /* One byte.  */
440 
          if (value > (int) MAX_UBYTE || value < MIN_BYTE)
441 
            return bfd_reloc_overflow;
442 
          value &= 0xFF;
443 
          bfd_put_8 (abfd, (bfd_vma) value, (unsigned char *) data + octets);
444 
          break;
445 
 
446 
        case R_S_16C_16:        /* Two bytes.  */
447 
          if (value > (int) MAX_UWORD || value < MIN_WORD)
448 
            return bfd_reloc_overflow;
449 
          value &= 0xFFFF;
450 
          sword = value;
451 
          bfd_put_16 (abfd, (bfd_vma) sword,
452 
                      (unsigned char *) data + octets);
453 
          break;
454 
 
455 
        case R_S_16C_32:        /* Four bytes.  */
456 
          value &= 0xFFFFFFFF;
457 
          bfd_put_32 (abfd, (bfd_vma) value, (bfd_byte *) data + octets);
458 
          break;
459 
 
460 
        default:
461 
          return bfd_reloc_notsupported;
462 
        }
463 
      break;
464 
 
465 
    case R_16C_DISPL:
466 
      switch (size)
467 
        {
468 
        case R_S_16C_04:        /* word1(4-7).  */
469 
          if ((value - 32) > 32 || value < 2)
470 
            return bfd_reloc_overflow;
471 
          value >>= 1;
472 
          value--;
473 
          value &= 0xF;
474 
          value <<= 4;
475 
          value |= left_val;
476 
          bfd_put_8 (abfd, (bfd_vma) value, (unsigned char *) data + octets);
477 
          break;
478 
 
479 
        case R_S_16C_08:    /* word1(0-3,8-11).  */
480 
          if (value > 255 || value < -256 || value == 0x80)
481 
            return bfd_reloc_overflow;
482 
          value &= 0x1FF;
483 
          value >>= 1;
484 
          sword = value & 0x000F;
485 
          sword |= (value & 0x00F0) << 4;
486 
          sword |= left_val;
487 
          bfd_put_16 (abfd, (bfd_vma) sword,
488 
                      (unsigned char *) data + octets);
489 
          break;
490 
 
491 
        case R_S_16C_16:    /* word2.  */
492 
          if (value > 65535 || value < -65536)
493 
            return bfd_reloc_overflow;
494 
          value >>= 1;
495 
          value &= 0xFFFF;
496 
          value = ((value & 0x8000) >> 15) | ((value & 0x7FFF) << 1);
497 
          sword = value;
498 
          bfd_put_16 (abfd, (bfd_vma) sword,
499 
                      (unsigned char *) data + octets);
500 
          break;
501 
 
502 
        case R_S_16C_24_a:      /* word1(0-7),word2.  */
503 
          if (value > 16777215 || value < -16777216)
504 
            return bfd_reloc_overflow;
505 
          value &= 0x1FFFFFF;
506 
          value >>= 1;
507 
          value = ((value & 0x00007FFF) << 17) |
508 
            ((value & 0x00800000) >> 7) | ((value & 0x007F8000) >> 15);
509 
          value |= left_val;
510 
          bfd_put_32 (abfd, (bfd_vma) value, (bfd_byte *) data + octets);
511 
          break;
512 
 
513 
        case R_S_16C_24:    /* word2(0-3,8-11),word3.  */
514 
          if (value > 16777215 || value < -16777216)
515 
            return bfd_reloc_overflow;
516 
          value &= 0x1FFFFFF;
517 
          value >>= 1;
518 
 
519 
          value = ((value & 0x007FFFFF) << 1) | ((value & 0x00800000) >> 23);
520 
 
521 
          value = ((value & 0x0000FFFF) << 16) |
522 
            ((value & 0x000F0000) >> 8) | ((value & 0x00F00000) >> 20);
523 
          value |= left_val;
524 
          bfd_put_32 (abfd, (bfd_vma) value, (bfd_byte *) data + octets);
525 
          break;
526 
 
527 
        default:
528 
          return bfd_reloc_notsupported;
529 
        }
530 
      break;
531 
 
532 
    case R_16C_REGREL:
533 
      switch (size)
534 
        {
535 
        case R_S_16C_04:        /* word1(12-15) not scaled.  */
536 
          if (value > 13 || value < 0)
537 
            return bfd_reloc_overflow;
538 
          value &= 0xF;
539 
          value |= left_val;
540 
          bfd_put_8 (abfd, (bfd_vma) value, (unsigned char *) data + octets);
541 
          break;
542 
 
543 
        case R_S_16C_04_a:      /* word1(12-15) not scaled.  */
544 
          if (value > 26 || value < 0)
545 
            return bfd_reloc_overflow;
546 
          value &= 0x1F;
547 
          value >>= 1;
548 
          value |= left_val;
549 
          bfd_put_8 (abfd, (bfd_vma) value, (unsigned char *) data + octets);
550 
          break;
551 
 
552 
        case R_S_16C_14:        /* word1(4-5),word2(0-3,8-15).  */
553 
          if (value < 0 || value > 16383)
554 
            return bfd_reloc_overflow;
555 
          value &= 0x3FFF;
556 
          value = ((value & 0x000000c0) << 24) |
557 
            ((value & 0x00003F00) << 16) |
558 
            ((value & 0x0000000F) << 16) | (value & 0x00000030);
559 
          value |= left_val;
560 
          bfd_put_32 (abfd, (bfd_vma) value, (bfd_byte *) data + octets);
561 
          break;
562 
 
563 
        case R_S_16C_16:        /* word2.  */
564 
          if (value > 65535 || value < 0)
565 
            return bfd_reloc_overflow;
566 
          value &= 0xFFFF;
567 
          sword = value;
568 
          bfd_put_16 (abfd, (bfd_vma) sword,
569 
                      (unsigned char *) data + octets);
570 
          break;
571 
 
572 
        case R_S_16C_20:        /* word2(8-11),word3.  */
573 
          /* if (value > 1048575 || value < 0) RELOC_ERROR(1); */
574 
          value &= 0xFFFFF;
575 
          sword = value & 0x0000FFFF;
576 
          value = (value & 0x000F0000) >> 16;
577 
          value |= left_val;
578 
          bfd_put_8 (abfd, (bfd_vma) value, (unsigned char *) data + octets);
579 
          bfd_put_16 (abfd, (bfd_vma) sword,
580 
                      (unsigned char *) data + octets + 1);
581 
          if (neg2pos)
582 
            {
583 
              /* Change load/stor negative displ opcode
584 
                 to load/stor positive displ opcode.  */
585 
              value = bfd_get_8 (abfd, (char *) data + octets - 3);
586 
              value &= 0xF7;
587 
              value |= 0x2;
588 
              bfd_put_8 (abfd, (bfd_vma) value,
589 
                         (unsigned char *) data + octets - 3);
590 
            }
591 
          break;
592 
 
593 
        default:
594 
          return bfd_reloc_notsupported;
595 
        }
596 
      break;
597 
 
598 
    case R_16C_ABS:
599 
      switch (size)
600 
        {
601 
        case R_S_16C_20:        /* word1(0-3),word2.  */
602 
          if (value > 1048575 || value < 0)
603 
            return bfd_reloc_overflow;
604 
          value &= 0xFFFFF;
605 
          value = ((value & 0x0000FFFF) << 16) |
606 
            ((value & 0x000F0000) >> 16);
607 
          value |= left_val;
608 
          bfd_put_32 (abfd, (bfd_vma) value, (bfd_byte *) data + octets);
609 
          break;
610 
 
611 
        case R_S_16C_24:        /* word2(0-3,8-11),word3.  */
612 
          /* if (value > 16777215 || value < 0) RELOC_ERROR(1); */
613 
          value &= 0xFFFFFF;
614 
          value = ((value & 0x0000FFFF) << 16) |
615 
            ((value & 0x000F0000) >> 8) | ((value & 0x00F00000) >> 20);
616 
          value |= left_val;
617 
          bfd_put_32 (abfd, (bfd_vma) value, (bfd_byte *) data + octets);
618 
          break;
619 
 
620 
        default:
621 
          return bfd_reloc_notsupported;
622 
        }
623 
      break;
624 
 
625 
    case R_16C_IMMED:
626 
      switch (size)
627 
        {
628 
        case R_S_16C_04:        /* word1/2(4-7).  */
629 
          if (value > 15 || value < -1)
630 
            return bfd_reloc_overflow;
631 
          value &= 0xF;
632 
          value <<= 4;
633 
          value |= left_val;
634 
          bfd_put_8 (abfd, (bfd_vma) value, (unsigned char *) data + octets);
635 
          break;
636 
 
637 
        case R_S_16C_16:        /* word2.  */
638 
          if (value > 32767 || value < -32768)
639 
            return bfd_reloc_overflow;
640 
          value &= 0xFFFF;
641 
          sword = value;
642 
          bfd_put_16 (abfd, (bfd_vma) sword,
643 
                      (unsigned char *) data + octets);
644 
          break;
645 
 
646 
        case R_S_16C_20:        /* word1(0-3),word2.  */
647 
          if (value > 1048575 || value < 0)
648 
            return bfd_reloc_overflow;
649 
          value &= 0xFFFFF;
650 
          value = ((value & 0x0000FFFF) << 16) |
651 
            ((value & 0x000F0000) >> 16);
652 
          value |= left_val;
653 
          bfd_put_32 (abfd, (bfd_vma) value, (bfd_byte *) data + octets);
654 
          break;
655 
 
656 
        case R_S_16C_32:        /* word2, word3.  */
657 
          value &= 0xFFFFFFFF;
658 
          value = ((value & 0x0000FFFF) << 16) |
659 
            ((value & 0xFFFF0000) >> 16);
660 
          bfd_put_32 (abfd, (bfd_vma) value, (bfd_byte *) data + octets);
661 
          break;
662 
 
663 
        default:
664 
          return bfd_reloc_notsupported;
665 
        }
666 
      break;
667 
    default:
668 
      return bfd_reloc_notsupported;
669 
    }
670 
 
671 
  return bfd_reloc_ok;
672 
}
673 
 
674 
/* Relocate a CR16C ELF section.  */
675 
 
676 
static bfd_boolean
677 
elf32_cr16c_relocate_section (bfd *output_bfd,
678 
                              struct bfd_link_info *info,
679 
                              bfd *input_bfd,
680 
                              asection *input_section,
681 
                              bfd_byte *contents,
682 
                              Elf_Internal_Rela *relocs,
683 
                              Elf_Internal_Sym *local_syms,
684 
                              asection **local_sections)
685 
{
686 
  Elf_Internal_Shdr *symtab_hdr;
687 
  struct elf_link_hash_entry **sym_hashes;
688 
  Elf_Internal_Rela *rel, *relend;
689 
 
690 
  symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
691 
  sym_hashes = elf_sym_hashes (input_bfd);
692 
 
693 
  rel = relocs;
694 
  relend = relocs + input_section->reloc_count;
695 
  for (; rel < relend; rel++)
696 
    {
697 
      int r_type;
698 
      reloc_howto_type *howto;
699 
      unsigned long r_symndx;
700 
      Elf_Internal_Sym *sym;
701 
      asection *sec;
702 
      struct elf_link_hash_entry *h;
703 
      bfd_vma relocation;
704 
      bfd_reloc_status_type r;
705 
 
706 
      r_symndx = ELF32_R_SYM (rel->r_info);
707 
      r_type = ELF32_R_TYPE (rel->r_info);
708 
      howto = elf_howto_table + r_type;
709 
 
710 
      h = NULL;
711 
      sym = NULL;
712 
      sec = NULL;
713 
      if (r_symndx < symtab_hdr->sh_info)
714 
        {
715 
          sym = local_syms + r_symndx;
716 
          sec = local_sections[r_symndx];
717 
          relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
718 
        }
719 
      else
720 
        {
721 
          bfd_boolean unresolved_reloc, warned;
722 
 
723 
          RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
724 
                                   r_symndx, symtab_hdr, sym_hashes,
725 
                                   h, sec, relocation,
726 
                                   unresolved_reloc, warned);
727 
        }
728 
 
729 
      if (sec != NULL && elf_discarded_section (sec))
730 
        {
731 
          /* For relocs against symbols from removed linkonce sections,
732 
             or sections discarded by a linker script, we just want the
733 
             section contents zeroed.  Avoid any special processing.  */
734 
          _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
735 
          rel->r_info = 0;
736 
          rel->r_addend = 0;
737 
          continue;
738 
        }
739 
 
740 
      if (info->relocatable)
741 
        {
742 
          /* This is a relocatable link.  We don't have to change
743 
             anything, unless the reloc is against a section symbol,
744 
             in which case we have to adjust according to where the
745 
             section symbol winds up in the output section.  */
746 
          if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
747 
            rel->r_addend += sec->output_offset;
748 
          continue;
749 
        }
750 
 
751 
      r = cr16c_elf_final_link_relocate (howto, input_bfd, output_bfd,
752 
                                         input_section,
753 
                                         contents, rel->r_offset,
754 
                                         relocation, rel->r_addend,
755 
                                         info, sec, h == NULL);
756 
 
757 
      if (r != bfd_reloc_ok)
758 
        {
759 
          const char *name;
760 
          const char *msg = (const char *) 0;
761 
 
762 
          if (h != NULL)
763 
            name = h->root.root.string;
764 
          else
765 
            {
766 
              name = (bfd_elf_string_from_elf_section
767 
                      (input_bfd, symtab_hdr->sh_link, sym->st_name));
768 
              if (name == NULL || *name == '\0')
769 
                name = bfd_section_name (input_bfd, sec);
770 
            }
771 
 
772 
          switch (r)
773 
            {
774 
            case bfd_reloc_overflow:
775 
              if (!((*info->callbacks->reloc_overflow)
776 
                    (info, (h ? &h->root : NULL), name, howto->name,
777 
                     (bfd_vma) 0, input_bfd, input_section,
778 
                     rel->r_offset)))
779 
                return FALSE;
780 
              break;
781 
 
782 
            case bfd_reloc_undefined:
783 
              if (!((*info->callbacks->undefined_symbol)
784 
                    (info, name, input_bfd, input_section,
785 
                     rel->r_offset, TRUE)))
786 
                return FALSE;
787 
              break;
788 
 
789 
            case bfd_reloc_outofrange:
790 
              msg = _("internal error: out of range error");
791 
              goto common_error;
792 
 
793 
            case bfd_reloc_notsupported:
794 
              msg = _("internal error: unsupported relocation error");
795 
              goto common_error;
796 
 
797 
            case bfd_reloc_dangerous:
798 
              msg = _("internal error: dangerous error");
799 
              goto common_error;
800 
 
801 
            default:
802 
              msg = _("internal error: unknown error");
803 
              /* fall through */
804 
 
805 
            common_error:
806 
              if (!((*info->callbacks->warning)
807 
                    (info, msg, name, input_bfd, input_section,
808 
                     rel->r_offset)))
809 
                return FALSE;
810 
              break;
811 
            }
812 
        }
813 
    }
814 
 
815 
  return TRUE;
816 
}
817 
 
818 
/* CR16C ELF uses three common sections:
819 
   One is for default common symbols (placed in usual common section).
820 
   Second is for near common symbols (placed in "ncommon" section).
821 
   Third is for far common symbols (placed in "fcommon" section).
822 
   The following implementation is based on elf32-mips architecture */
823 
 
824 
static asection  cr16c_elf_fcom_section;
825 
static asymbol   cr16c_elf_fcom_symbol;
826 
static asymbol * cr16c_elf_fcom_symbol_ptr;
827 
static asection  cr16c_elf_ncom_section;
828 
static asymbol   cr16c_elf_ncom_symbol;
829 
static asymbol * cr16c_elf_ncom_symbol_ptr;
830 
 
831 
/* Given a BFD section, try to locate the
832 
   corresponding ELF section index.  */
833 
 
834 
static bfd_boolean
835 
elf32_cr16c_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
836 
                                      asection *sec,
837 
                                      int *retval)
838 
{
839 
  if (strcmp (bfd_get_section_name (abfd, sec), ".fcommon") == 0)
840 
    *retval = SHN_CR16C_FCOMMON;
841 
  else if (strcmp (bfd_get_section_name (abfd, sec), ".ncommon") == 0)
842 
    *retval = SHN_CR16C_NCOMMON;
843 
  else
844 
    return FALSE;
845 
 
846 
  return TRUE;
847 
}
848 
 
849 
/* Handle the special CR16C section numbers that a symbol may use.  */
850 
 
851 
static void
852 
elf32_cr16c_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
853 
                               asymbol *asym)
854 
{
855 
  elf_symbol_type *elfsym = (elf_symbol_type *) asym;
856 
  unsigned int indx;
857 
 
858 
  indx = elfsym->internal_elf_sym.st_shndx;
859 
 
860 
  switch (indx)
861 
    {
862 
    case SHN_CR16C_FCOMMON:
863 
      if (cr16c_elf_fcom_section.name == NULL)
864 
        {
865 
          /* Initialize the far common section.  */
866 
          cr16c_elf_fcom_section.name = ".fcommon";
867 
          cr16c_elf_fcom_section.flags = SEC_IS_COMMON | SEC_ALLOC;
868 
          cr16c_elf_fcom_section.output_section = &cr16c_elf_fcom_section;
869 
          cr16c_elf_fcom_section.symbol = &cr16c_elf_fcom_symbol;
870 
          cr16c_elf_fcom_section.symbol_ptr_ptr = &cr16c_elf_fcom_symbol_ptr;
871 
          cr16c_elf_fcom_symbol.name = ".fcommon";
872 
          cr16c_elf_fcom_symbol.flags = BSF_SECTION_SYM;
873 
          cr16c_elf_fcom_symbol.section = &cr16c_elf_fcom_section;
874 
          cr16c_elf_fcom_symbol_ptr = &cr16c_elf_fcom_symbol;
875 
        }
876 
      asym->section = &cr16c_elf_fcom_section;
877 
      asym->value = elfsym->internal_elf_sym.st_size;
878 
      break;
879 
    case SHN_CR16C_NCOMMON:
880 
      if (cr16c_elf_ncom_section.name == NULL)
881 
        {
882 
          /* Initialize the far common section.  */
883 
          cr16c_elf_ncom_section.name = ".ncommon";
884 
          cr16c_elf_ncom_section.flags = SEC_IS_COMMON | SEC_ALLOC;
885 
          cr16c_elf_ncom_section.output_section = &cr16c_elf_ncom_section;
886 
          cr16c_elf_ncom_section.symbol = &cr16c_elf_ncom_symbol;
887 
          cr16c_elf_ncom_section.symbol_ptr_ptr = &cr16c_elf_ncom_symbol_ptr;
888 
          cr16c_elf_ncom_symbol.name = ".ncommon";
889 
          cr16c_elf_ncom_symbol.flags = BSF_SECTION_SYM;
890 
          cr16c_elf_ncom_symbol.section = &cr16c_elf_ncom_section;
891 
          cr16c_elf_ncom_symbol_ptr = &cr16c_elf_ncom_symbol;
892 
        }
893 
      asym->section = &cr16c_elf_ncom_section;
894 
      asym->value = elfsym->internal_elf_sym.st_size;
895 
      break;
896 
    }
897 
}
898 
 
899 
/* Hook called by the linker routine which adds symbols from an object
900 
   file.  We must handle the special cr16c section numbers here.  */
901 
 
902 
static bfd_boolean
903 
elf32_cr16c_add_symbol_hook (bfd *abfd,
904 
                             struct bfd_link_info *info ATTRIBUTE_UNUSED,
905 
                             Elf_Internal_Sym *sym,
906 
                             const char **namep ATTRIBUTE_UNUSED,
907 
                             flagword *flagsp ATTRIBUTE_UNUSED,
908 
                             asection **secp,
909 
                             bfd_vma *valp)
910 
{
911 
  unsigned int indx = sym->st_shndx;
912 
 
913 
  switch (indx)
914 
    {
915 
    case SHN_CR16C_FCOMMON:
916 
      *secp = bfd_make_section_old_way (abfd, ".fcommon");
917 
      (*secp)->flags |= SEC_IS_COMMON;
918 
      *valp = sym->st_size;
919 
      break;
920 
    case SHN_CR16C_NCOMMON:
921 
      *secp = bfd_make_section_old_way (abfd, ".ncommon");
922 
      (*secp)->flags |= SEC_IS_COMMON;
923 
      *valp = sym->st_size;
924 
      break;
925 
    }
926 
 
927 
  return TRUE;
928 
}
929 
 
930 
static bfd_boolean
931 
elf32_cr16c_link_output_symbol_hook (struct bfd_link_info *info ATTRIBUTE_UNUSED,
932 
                                     const char *name ATTRIBUTE_UNUSED,
933 
                                     Elf_Internal_Sym *sym,
934 
                                     asection *input_sec,
935 
                                     struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
936 
{
937 
  /* If we see a common symbol, which implies a relocatable link, then
938 
     if a symbol was in a special common section in an input file, mark
939 
     it as a special common in the output file.  */
940 
 
941 
  if (sym->st_shndx == SHN_COMMON)
942 
    {
943 
      if (strcmp (input_sec->name, ".fcommon") == 0)
944 
        sym->st_shndx = SHN_CR16C_FCOMMON;
945 
      else if (strcmp (input_sec->name, ".ncommon") == 0)
946 
        sym->st_shndx = SHN_CR16C_NCOMMON;
947 
    }
948 
 
949 
  return TRUE;
950 
}
951 
 
952 
/* Definitions for setting CR16C target vector.  */
953 
#define TARGET_LITTLE_SYM               bfd_elf32_cr16c_vec
954 
#define TARGET_LITTLE_NAME              "elf32-cr16c"
955 
#define ELF_ARCH                        bfd_arch_cr16c
956 
#define ELF_MACHINE_CODE                EM_CR
957 
#define ELF_MAXPAGESIZE                 0x1
958 
#define elf_symbol_leading_char         '_'
959 
 
960 
#define bfd_elf32_bfd_reloc_type_lookup         elf_cr16c_reloc_type_lookup
961 
#define bfd_elf32_bfd_reloc_name_lookup elf_cr16c_reloc_name_lookup
962 
#define elf_info_to_howto                       elf_cr16c_info_to_howto
963 
#define elf_info_to_howto_rel                   elf_cr16c_info_to_howto_rel
964 
#define elf_backend_relocate_section            elf32_cr16c_relocate_section
965 
#define elf_backend_symbol_processing           elf32_cr16c_symbol_processing
966 
#define elf_backend_section_from_bfd_section    elf32_cr16c_section_from_bfd_section
967 
#define elf_backend_add_symbol_hook             elf32_cr16c_add_symbol_hook
968 
#define elf_backend_link_output_symbol_hook     elf32_cr16c_link_output_symbol_hook
969 
 
970 
#define elf_backend_can_gc_sections     1
971 
 
972 
#include "elf32-target.h"

powered by: WebSVN 2.1.0

© copyright 1999-2024 OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.