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

Subversion Repositories openrisc_me

[/] [openrisc/] [trunk/] [gnu-src/] [gdb-7.2/] [bfd/] [elf32-cr16c.c] - Blame information for rev 438

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

Line No. Rev Author Line
1 330 jeremybenn 
/* BFD back-end for National Semiconductor's CR16C ELF
2 
   Copyright 2004, 2005, 2006, 2007, 2009, 2010
3 
   Free Software Foundation, Inc.
4 
 
5 
   This file is part of BFD, the Binary File Descriptor library.
6 
 
7 
   This program is free software; you can redistribute it and/or modify
8 
   it under the terms of the GNU General Public License as published by
9 
   the Free Software Foundation; either version 3 of the License, or
10 
   (at your option) any later version.
11 
 
12 
   This program is distributed in the hope that it will be useful,
13 
   but WITHOUT ANY WARRANTY; without even the implied warranty of
14 
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 
   GNU General Public License for more details.
16 
 
17 
   You should have received a copy of the GNU General Public License
18 
   along with this program; if not, write to the Free Software
19 
   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
20 
   MA 02110-1301, USA.  */
21 
 
22 
#include "sysdep.h"
23 
#include "bfd.h"
24 
#include "libbfd.h"
25 
#include "bfdlink.h"
26 
#include "elf/cr16c.h"
27 
#include "elf-bfd.h"
28 
 
29 
 
30 
#define USE_REL 1       /* CR16C uses REL relocations instead of RELA.  */
31 
 
32 
/* The following definition is based on EMPTY_HOWTO macro,
33 
   but also initiates the "name" field in HOWTO struct.  */
34 
#define ONLY_NAME_HOWTO(C) \
35 
  HOWTO ((C), 0, 0, 0, FALSE, 0, complain_overflow_dont, NULL, \
36 
          STRINGX(C), FALSE, 0, 0, FALSE)
37 
 
38 
/* reloc_map_index array maps CRASM relocation type into a BFD
39 
   relocation enum. The array's indices are synchronized with
40 
   RINDEX_16C_* indices, created in include/elf/cr16c.h.
41 
   The array is used in:
42 
   1. elf32-cr16c.c : elf_cr16c_reloc_type_lookup().
43 
   2. asreloc.c : find_reloc_type(). */
44 
 
45 
RELOC_MAP reloc_map_index[RINDEX_16C_MAX] =
46 
{
47 
  {R_16C_NUM08,     BFD_RELOC_16C_NUM08},
48 
  {R_16C_NUM08_C,   BFD_RELOC_16C_NUM08_C},
49 
  {R_16C_NUM16,     BFD_RELOC_16C_NUM16},
50 
  {R_16C_NUM16_C,   BFD_RELOC_16C_NUM16_C},
51 
  {R_16C_NUM32,     BFD_RELOC_16C_NUM32},
52 
  {R_16C_NUM32_C,   BFD_RELOC_16C_NUM32_C},
53 
  {R_16C_DISP04,    BFD_RELOC_16C_DISP04},
54 
  {R_16C_DISP04_C,  BFD_RELOC_16C_DISP04_C},
55 
  {R_16C_DISP08,    BFD_RELOC_16C_DISP08},
56 
  {R_16C_DISP08_C,  BFD_RELOC_16C_DISP08_C},
57 
  {R_16C_DISP16,    BFD_RELOC_16C_DISP16},
58 
  {R_16C_DISP16_C,  BFD_RELOC_16C_DISP16_C},
59 
  {R_16C_DISP24,    BFD_RELOC_16C_DISP24},
60 
  {R_16C_DISP24_C,  BFD_RELOC_16C_DISP24_C},
61 
  {R_16C_DISP24a,   BFD_RELOC_16C_DISP24a},
62 
  {R_16C_DISP24a_C, BFD_RELOC_16C_DISP24a_C},
63 
  {R_16C_REG04,     BFD_RELOC_16C_REG04},
64 
  {R_16C_REG04_C,   BFD_RELOC_16C_REG04_C},
65 
  {R_16C_REG04a,    BFD_RELOC_16C_REG04a},
66 
  {R_16C_REG04a_C,  BFD_RELOC_16C_REG04a_C},
67 
  {R_16C_REG14,     BFD_RELOC_16C_REG14},
68 
  {R_16C_REG14_C,   BFD_RELOC_16C_REG14_C},
69 
  {R_16C_REG16,     BFD_RELOC_16C_REG16},
70 
  {R_16C_REG16_C,   BFD_RELOC_16C_REG16_C},
71 
  {R_16C_REG20,     BFD_RELOC_16C_REG20},
72 
  {R_16C_REG20_C,   BFD_RELOC_16C_REG20_C},
73 
  {R_16C_ABS20,     BFD_RELOC_16C_ABS20},
74 
  {R_16C_ABS20_C,   BFD_RELOC_16C_ABS20_C},
75 
  {R_16C_ABS24,     BFD_RELOC_16C_ABS24},
76 
  {R_16C_ABS24_C,   BFD_RELOC_16C_ABS24_C},
77 
  {R_16C_IMM04,     BFD_RELOC_16C_IMM04},
78 
  {R_16C_IMM04_C,   BFD_RELOC_16C_IMM04_C},
79 
  {R_16C_IMM16,     BFD_RELOC_16C_IMM16},
80 
  {R_16C_IMM16_C,   BFD_RELOC_16C_IMM16_C},
81 
  {R_16C_IMM20,     BFD_RELOC_16C_IMM20},
82 
  {R_16C_IMM20_C,   BFD_RELOC_16C_IMM20_C},
83 
  {R_16C_IMM24,     BFD_RELOC_16C_IMM24},
84 
  {R_16C_IMM24_C,   BFD_RELOC_16C_IMM24_C},
85 
  {R_16C_IMM32,     BFD_RELOC_16C_IMM32},
86 
  {R_16C_IMM32_C,   BFD_RELOC_16C_IMM32_C}
87 
};
88 
 
89 
static reloc_howto_type elf_howto_table[] =
90 
{
91 
  /* 00 */ ONLY_NAME_HOWTO (RINDEX_16C_NUM08),
92 
  /* 01 */ ONLY_NAME_HOWTO (RINDEX_16C_NUM08_C),
93 
  /* 02 */ ONLY_NAME_HOWTO (RINDEX_16C_NUM16),
94 
  /* 03 */ ONLY_NAME_HOWTO (RINDEX_16C_NUM16_C),
95 
  /* 04 */ ONLY_NAME_HOWTO (RINDEX_16C_NUM32),
96 
  /* 05 */ ONLY_NAME_HOWTO (RINDEX_16C_NUM32_C),
97 
  /* 06 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP04),
98 
  /* 07 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP04_C),
99 
  /* 08 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP08),
100 
  /* 09 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP08_C),
101 
  /* 10 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP16),
102 
  /* 11 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP16_C),
103 
  /* 12 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP24),
104 
  /* 13 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP24_C),
105 
  /* 14 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP24a),
106 
  /* 15 */ ONLY_NAME_HOWTO (RINDEX_16C_DISP24a_C),
107 
  /* 16 */ ONLY_NAME_HOWTO (RINDEX_16C_REG04),
108 
  /* 17 */ ONLY_NAME_HOWTO (RINDEX_16C_REG04_C),
109 
  /* 18 */ ONLY_NAME_HOWTO (RINDEX_16C_REG04a),
110 
  /* 19 */ ONLY_NAME_HOWTO (RINDEX_16C_REG04a_C),
111 
  /* 20 */ ONLY_NAME_HOWTO (RINDEX_16C_REG14),
112 
  /* 21 */ ONLY_NAME_HOWTO (RINDEX_16C_REG14_C),
113 
  /* 22 */ ONLY_NAME_HOWTO (RINDEX_16C_REG16),
114 
  /* 23 */ ONLY_NAME_HOWTO (RINDEX_16C_REG16_C),
115 
  /* 24 */ ONLY_NAME_HOWTO (RINDEX_16C_REG20),
116 
  /* 25 */ ONLY_NAME_HOWTO (RINDEX_16C_REG20_C),
117 
  /* 26 */ ONLY_NAME_HOWTO (RINDEX_16C_ABS20),
118 
  /* 27 */ ONLY_NAME_HOWTO (RINDEX_16C_ABS20_C),
119 
  /* 28 */ ONLY_NAME_HOWTO (RINDEX_16C_ABS24),
120 
  /* 29 */ ONLY_NAME_HOWTO (RINDEX_16C_ABS24_C),
121 
  /* 30 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM04),
122 
  /* 31 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM04_C),
123 
  /* 32 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM16),
124 
  /* 33 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM16_C),
125 
  /* 34 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM20),
126 
  /* 35 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM20_C),
127 
  /* 36 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM24),
128 
  /* 37 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM24_C),
129 
  /* 38 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM32),
130 
  /* 39 */ ONLY_NAME_HOWTO (RINDEX_16C_IMM32_C)
131 
};
132 
 
133 
 
134 
/* Code to turn a code_type into a howto ptr, uses the above howto table.  */
135 
 
136 
static reloc_howto_type *
137 
elf_cr16c_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
138 
                             bfd_reloc_code_real_type code)
139 
{
140 
  unsigned int i;
141 
 
142 
  for (i = 0; i < RINDEX_16C_MAX; i++)
143 
    {
144 
      if (code == reloc_map_index[i].bfd_reloc_enum)
145 
        {
146 
          /* printf ("CR16C Relocation Type is - %x\n", code); */
147 
          return & elf_howto_table[i];
148 
        }
149 
    }
150 
 
151 
  /* printf ("This relocation Type is not supported - %x\n", code); */
152 
  return 0;
153 
}
154 
 
155 
static reloc_howto_type *
156 
elf_cr16c_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
157 
                             const char *r_name)
158 
{
159 
  unsigned int i;
160 
 
161 
  for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
162 
    if (elf_howto_table[i].name != NULL
163 
        && strcasecmp (elf_howto_table[i].name, r_name) == 0)
164 
      return &elf_howto_table[i];
165 
 
166 
  return NULL;
167 
}
168 
 
169 
static void
170 
elf_cr16c_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
171 
                         arelent *cache_ptr ATTRIBUTE_UNUSED,
172 
                         Elf_Internal_Rela *dst ATTRIBUTE_UNUSED)
173 
{
174 
  abort ();
175 
}
176 
 
177 
static void
178 
elf_cr16c_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED,
179 
                             arelent *cache_ptr,
180 
                             Elf_Internal_Rela *dst)
181 
{
182 
  unsigned int r_type = ELF32_R_TYPE (dst->r_info);
183 
 
184 
  BFD_ASSERT (r_type < (unsigned int) RINDEX_16C_MAX);
185 
  cache_ptr->howto = &elf_howto_table[r_type];
186 
}
187 
 
188 
/* Perform a relocation as part of a final link.  */
189 
 
190 
static bfd_reloc_status_type
191 
cr16c_elf_final_link_relocate (reloc_howto_type *howto,
192 
                               bfd *abfd,
193 
                               bfd *output_bfd ATTRIBUTE_UNUSED,
194 
                               asection *input_section,
195 
                               bfd_byte *data,
196 
                               bfd_vma octets,
197 
                               bfd_vma Rvalue,
198 
                               bfd_vma addend ATTRIBUTE_UNUSED,
199 
                               struct bfd_link_info *info ATTRIBUTE_UNUSED,
200 
                               asection *sym_sec ATTRIBUTE_UNUSED,
201 
                               int is_local ATTRIBUTE_UNUSED)
202 
{
203 
  long value;
204 
  short sword;                  /* Extracted from the hole and put back.  */
205 
  unsigned long format, addr_type, code_factor;
206 
  unsigned short size;
207 
  unsigned short r_type;
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 
  switch (format)
228 
    {
229 
    case R_NUMBER:
230 
      switch (size)
231 
        {
232 
        case R_S_16C_08:        /* One byte.  */
233 
          value = bfd_get_8 (abfd, (char *) data + octets);
234 
          break;
235 
        case R_S_16C_16:        /* Two bytes. */
236 
          sword = bfd_get_16 (abfd, (bfd_byte *) data + octets);
237 
          value = sword;
238 
          break;
239 
        case R_S_16C_32:        /* Four bytes.  */
240 
          value = bfd_get_32 (abfd, (bfd_byte *) data + octets);
241 
          break;
242 
        default:
243 
          return bfd_reloc_notsupported;
244 
        }
245 
      break;
246 
 
247 
    case R_16C_DISPL:
248 
      switch (size)
249 
        {
250 
        case R_S_16C_04:    /* word1(4-7).  */
251 
          value = bfd_get_8 (abfd, (char *) data + octets);
252 
          left_val = value & 0xF;
253 
          value = (value & 0xF0) >> 4;
254 
          value++;
255 
          value <<= 1;
256 
          break;
257 
        case R_S_16C_08:    /* word1(0-3,8-11).  */
258 
          sword = bfd_get_16 (abfd, (char *) data + octets);
259 
          value = sword & 0x000F;
260 
          value |= ((sword & 0x0F00) >> 4);
261 
          left_val = sword & 0xF0F0;
262 
          value <<= 1;
263 
          if (value & 0x100)
264 
            value |= 0xFFFFFF00;
265 
          break;
266 
        case R_S_16C_16:    /* word2.  */
267 
          sword = bfd_get_16 (abfd, (bfd_byte *) data + octets);
268 
          value = sword;
269 
          value = ((value & 0xFFFE) >> 1) | ((value & 0x1) << 15);
270 
          value <<= 1;
271 
          if (value & 0x10000)
272 
            value |= 0xFFFF0000;
273 
          break;
274 
        case R_S_16C_24_a:      /* word1(0-7),word2.  */
275 
          value = bfd_get_32 (abfd, (bfd_byte *) data + octets);
276 
          left_val = value & 0x0000FF00;
277 
          value = ((value & 0xFFFE0000) >> 17) |
278 
            ((value & 0x00010000) << 7) | ((value & 0x000000FF) << 15);
279 
          value <<= 1;
280 
          if (value & 0x1000000)
281 
            value |= 0xFE000000;
282 
          break;
283 
        case R_S_16C_24:    /* word2(0-3,8-11),word3.  */
284 
          value = bfd_get_32 (abfd, (bfd_byte *) data + octets);
285 
          left_val = value & 0x0000F0F0;
286 
          value = ((value >> 16) & 0x0000FFFF) |
287 
            ((value & 0x00000F00) << 8) | ((value & 0x0000000F) << 20);
288 
 
289 
          value = ((value & 0x00FFFFFE) >> 1) | ((value & 0x00000001) << 23);
290 
 
291 
          value <<= 1;
292 
          if (value & 0x1000000)
293 
            value |= 0xFE000000;
294 
          break;
295 
        default:
296 
          return bfd_reloc_notsupported;
297 
        }
298 
      break;
299 
 
300 
    case R_16C_REGREL:
301 
      switch (size)
302 
        {
303 
        case R_S_16C_04:    /* word1(12-15) not scaled.  */
304 
          value = bfd_get_8 (abfd, (char *) data + octets);
305 
          left_val = value & 0xF0;
306 
          value = value & 0xF;
307 
          break;
308 
        case R_S_16C_04_a:      /* word1(12-15) scaled by 2.  */
309 
          value = bfd_get_8 (abfd, (char *) data + octets);
310 
          left_val = value & 0xF0;
311 
          value = value & 0xF;
312 
          value <<= 1;
313 
          break;
314 
        case R_S_16C_14:    /* word1(4-5),word2(0-3,8-15).  */
315 
          value = bfd_get_32 (abfd, (bfd_byte *) data + octets);
316 
          left_val = value & 0x00F0FFCF;
317 
          value = ((value & 0xc0000000) >> 24) |
318 
            ((value & 0x3F000000) >> 16) |
319 
            ((value & 0x000F0000) >> 16) | (value & 0x00000030);
320 
          break;
321 
        case R_S_16C_16:    /* word2.  */
322 
          sword = bfd_get_16 (abfd, (bfd_byte *) data + octets);
323 
          value = sword;
324 
          break;
325 
        case R_S_16C_20:    /* word2(8-11),word3.  */
326 
          value = bfd_get_32 (abfd, (bfd_byte *) data + octets);
327 
          left_val = value & 0xF0;
328 
          value = (value & 0xF) << 16;
329 
          sword = bfd_get_16 (abfd, (bfd_byte *) data + octets + 1);
330 
          value = value | (unsigned short) sword;
331 
          disp20_opcod = bfd_get_32 (abfd, (bfd_byte *) data + octets - 3);
332 
          disp20_opcod |= 0x0FFF0000;
333 
          if ((disp20_opcod == 0x4FFF0018) ||   /* loadb -disp20(reg) */
334 
              (disp20_opcod == 0x5FFF0018) ||   /* loadb -disp20(rp)  */
335 
              (disp20_opcod == 0x8FFF0018) ||   /* loadd -disp20(reg) */
336 
              (disp20_opcod == 0x9FFF0018) ||   /* loadd -disp20(rp)  */
337 
              (disp20_opcod == 0xCFFF0018) ||   /* loadw -disp20(reg) */
338 
              (disp20_opcod == 0xDFFF0018) ||   /* loadw -disp20(rp)  */
339 
              (disp20_opcod == 0x4FFF0019) ||   /* storb -disp20(reg) */
340 
              (disp20_opcod == 0x5FFF0019) ||   /* storb -disp20(rp)  */
341 
              (disp20_opcod == 0x8FFF0019) ||   /* stord -disp20(reg) */
342 
              (disp20_opcod == 0x9FFF0019) ||   /* stord -disp20(rp)  */
343 
              (disp20_opcod == 0xCFFF0019) ||   /* storw -disp20(reg) */
344 
              (disp20_opcod == 0xDFFF0019))
345 
            {   /* storw -disp20(rp).  */
346 
              neg = 1;
347 
              value |= 0xFFF00000;
348 
            }
349 
 
350 
          break;
351 
        default:
352 
          return bfd_reloc_notsupported;
353 
        }
354 
      break;
355 
 
356 
    case R_16C_ABS:
357 
      switch (size)
358 
        {
359 
        case R_S_16C_20:    /* word1(0-3),word2.  */
360 
          value = bfd_get_32 (abfd, (bfd_byte *) data + octets);
361 
          left_val = value & 0x0000FFF0;
362 
          value = ((value & 0xFFFF0000) >> 16) |
363 
            ((value & 0x0000000F) << 16);
364 
          break;
365 
        case R_S_16C_24:   /* word2(0-3,8-11),word3.  */
366 
          value = bfd_get_32 (abfd, (bfd_byte *) data + octets);
367 
          left_val = value & 0x0000F0F0;
368 
          value = ((value & 0xFFFF0000) >> 16) |
369 
            ((value & 0x00000F00) << 8) | ((value & 0x0000000F) << 20);
370 
          break;
371 
        default:
372 
          return bfd_reloc_notsupported;
373 
        }
374 
      break;
375 
 
376 
    case R_16C_IMMED:
377 
      switch (size)
378 
        {
379 
        case R_S_16C_04:    /* word1/2(4-7).  */
380 
          value = bfd_get_8 (abfd, (char *) data + octets);
381 
          left_val = value & 0xF;
382 
          value = (value & 0xF0) >> 4;
383 
          break;
384 
        case R_S_16C_16:    /* word2.  */
385 
          sword = bfd_get_16 (abfd, (bfd_byte *) data + octets);
386 
          value = sword;
387 
          break;
388 
        case R_S_16C_20:    /* word1(0-3),word2.  */
389 
          value = bfd_get_32 (abfd, (bfd_byte *) data + octets);
390 
          left_val = value & 0x0000FFF0;
391 
          value = ((value & 0xFFFF0000) >> 16) |
392 
            ((value & 0x0000000F) << 16);
393 
          break;
394 
        case R_S_16C_32:    /* word2, word3.  */
395 
          value = bfd_get_32 (abfd, (bfd_byte *) data + octets);
396 
          value = ((value & 0x0000FFFF) << 16) |
397 
            ((value & 0xFFFF0000) >> 16);
398 
          break;
399 
        default:
400 
          return bfd_reloc_notsupported;
401 
        }
402 
      break;
403 
    default:
404 
      return bfd_reloc_notsupported;
405 
    }
406 
 
407 
  switch ((r_type & R_RELTO) >> 4)
408 
    {
409 
 
410 
    case 0:      /* R_ABS.  */
411 
      plus_factor = Rvalue;
412 
      break;
413 
    case 1:     /* R_PCREL.  */
414 
      plus_factor = Rvalue -
415 
        (input_section->output_section->vma + input_section->output_offset);
416 
      break;
417 
    default:
418 
      return bfd_reloc_notsupported;
419 
    }
420 
 
421 
  if (neg)
422 
    {
423 
      if (plus_factor >= -value)
424 
        neg2pos = 1;
425 
      /* We need to change load/stor with negative
426 
         displ opcode to positive disp opcode (CR16C).  */
427 
    }
428 
 
429 
  value = value + (plus_factor >> code_factor);
430 
 
431 
  switch (format)
432 
    {
433 
    case R_NUMBER:
434 
      switch (size)
435 
        {
436 
        case R_S_16C_08:        /* One byte.  */
437 
          if (value > (int) MAX_UBYTE || value < MIN_BYTE)
438 
            return bfd_reloc_overflow;
439 
          value &= 0xFF;
440 
          bfd_put_8 (abfd, (bfd_vma) value, (unsigned char *) data + octets);
441 
          break;
442 
 
443 
        case R_S_16C_16:        /* Two bytes.  */
444 
          if (value > (int) MAX_UWORD || value < MIN_WORD)
445 
            return bfd_reloc_overflow;
446 
          value &= 0xFFFF;
447 
          sword = value;
448 
          bfd_put_16 (abfd, (bfd_vma) sword,
449 
                      (unsigned char *) data + octets);
450 
          break;
451 
 
452 
        case R_S_16C_32:        /* Four bytes.  */
453 
          value &= 0xFFFFFFFF;
454 
          bfd_put_32 (abfd, (bfd_vma) value, (bfd_byte *) data + octets);
455 
          break;
456 
 
457 
        default:
458 
          return bfd_reloc_notsupported;
459 
        }
460 
      break;
461 
 
462 
    case R_16C_DISPL:
463 
      switch (size)
464 
        {
465 
        case R_S_16C_04:        /* word1(4-7).  */
466 
          if ((value - 32) > 32 || value < 2)
467 
            return bfd_reloc_overflow;
468 
          value >>= 1;
469 
          value--;
470 
          value &= 0xF;
471 
          value <<= 4;
472 
          value |= left_val;
473 
          bfd_put_8 (abfd, (bfd_vma) value, (unsigned char *) data + octets);
474 
          break;
475 
 
476 
        case R_S_16C_08:    /* word1(0-3,8-11).  */
477 
          if (value > 255 || value < -256 || value == 0x80)
478 
            return bfd_reloc_overflow;
479 
          value &= 0x1FF;
480 
          value >>= 1;
481 
          sword = value & 0x000F;
482 
          sword |= (value & 0x00F0) << 4;
483 
          sword |= left_val;
484 
          bfd_put_16 (abfd, (bfd_vma) sword,
485 
                      (unsigned char *) data + octets);
486 
          break;
487 
 
488 
        case R_S_16C_16:    /* word2.  */
489 
          if (value > 65535 || value < -65536)
490 
            return bfd_reloc_overflow;
491 
          value >>= 1;
492 
          value &= 0xFFFF;
493 
          value = ((value & 0x8000) >> 15) | ((value & 0x7FFF) << 1);
494 
          sword = value;
495 
          bfd_put_16 (abfd, (bfd_vma) sword,
496 
                      (unsigned char *) data + octets);
497 
          break;
498 
 
499 
        case R_S_16C_24_a:      /* word1(0-7),word2.  */
500 
          if (value > 16777215 || value < -16777216)
501 
            return bfd_reloc_overflow;
502 
          value &= 0x1FFFFFF;
503 
          value >>= 1;
504 
          value = ((value & 0x00007FFF) << 17) |
505 
            ((value & 0x00800000) >> 7) | ((value & 0x007F8000) >> 15);
506 
          value |= left_val;
507 
          bfd_put_32 (abfd, (bfd_vma) value, (bfd_byte *) data + octets);
508 
          break;
509 
 
510 
        case R_S_16C_24:    /* word2(0-3,8-11),word3.  */
511 
          if (value > 16777215 || value < -16777216)
512 
            return bfd_reloc_overflow;
513 
          value &= 0x1FFFFFF;
514 
          value >>= 1;
515 
 
516 
          value = ((value & 0x007FFFFF) << 1) | ((value & 0x00800000) >> 23);
517 
 
518 
          value = ((value & 0x0000FFFF) << 16) |
519 
            ((value & 0x000F0000) >> 8) | ((value & 0x00F00000) >> 20);
520 
          value |= left_val;
521 
          bfd_put_32 (abfd, (bfd_vma) value, (bfd_byte *) data + octets);
522 
          break;
523 
 
524 
        default:
525 
          return bfd_reloc_notsupported;
526 
        }
527 
      break;
528 
 
529 
    case R_16C_REGREL:
530 
      switch (size)
531 
        {
532 
        case R_S_16C_04:        /* word1(12-15) not scaled.  */
533 
          if (value > 13 || value < 0)
534 
            return bfd_reloc_overflow;
535 
          value &= 0xF;
536 
          value |= left_val;
537 
          bfd_put_8 (abfd, (bfd_vma) value, (unsigned char *) data + octets);
538 
          break;
539 
 
540 
        case R_S_16C_04_a:      /* word1(12-15) not scaled.  */
541 
          if (value > 26 || value < 0)
542 
            return bfd_reloc_overflow;
543 
          value &= 0x1F;
544 
          value >>= 1;
545 
          value |= left_val;
546 
          bfd_put_8 (abfd, (bfd_vma) value, (unsigned char *) data + octets);
547 
          break;
548 
 
549 
        case R_S_16C_14:        /* word1(4-5),word2(0-3,8-15).  */
550 
          if (value < 0 || value > 16383)
551 
            return bfd_reloc_overflow;
552 
          value &= 0x3FFF;
553 
          value = ((value & 0x000000c0) << 24) |
554 
            ((value & 0x00003F00) << 16) |
555 
            ((value & 0x0000000F) << 16) | (value & 0x00000030);
556 
          value |= left_val;
557 
          bfd_put_32 (abfd, (bfd_vma) value, (bfd_byte *) data + octets);
558 
          break;
559 
 
560 
        case R_S_16C_16:        /* word2.  */
561 
          if (value > 65535 || value < 0)
562 
            return bfd_reloc_overflow;
563 
          value &= 0xFFFF;
564 
          sword = value;
565 
          bfd_put_16 (abfd, (bfd_vma) sword,
566 
                      (unsigned char *) data + octets);
567 
          break;
568 
 
569 
        case R_S_16C_20:        /* word2(8-11),word3.  */
570 
          /* if (value > 1048575 || value < 0) RELOC_ERROR(1); */
571 
          value &= 0xFFFFF;
572 
          sword = value & 0x0000FFFF;
573 
          value = (value & 0x000F0000) >> 16;
574 
          value |= left_val;
575 
          bfd_put_8 (abfd, (bfd_vma) value, (unsigned char *) data + octets);
576 
          bfd_put_16 (abfd, (bfd_vma) sword,
577 
                      (unsigned char *) data + octets + 1);
578 
          if (neg2pos)
579 
            {
580 
              /* Change load/stor negative displ opcode
581 
                 to load/stor positive displ opcode.  */
582 
              value = bfd_get_8 (abfd, (char *) data + octets - 3);
583 
              value &= 0xF7;
584 
              value |= 0x2;
585 
              bfd_put_8 (abfd, (bfd_vma) value,
586 
                         (unsigned char *) data + octets - 3);
587 
            }
588 
          break;
589 
 
590 
        default:
591 
          return bfd_reloc_notsupported;
592 
        }
593 
      break;
594 
 
595 
    case R_16C_ABS:
596 
      switch (size)
597 
        {
598 
        case R_S_16C_20:        /* word1(0-3),word2.  */
599 
          if (value > 1048575 || value < 0)
600 
            return bfd_reloc_overflow;
601 
          value &= 0xFFFFF;
602 
          value = ((value & 0x0000FFFF) << 16) |
603 
            ((value & 0x000F0000) >> 16);
604 
          value |= left_val;
605 
          bfd_put_32 (abfd, (bfd_vma) value, (bfd_byte *) data + octets);
606 
          break;
607 
 
608 
        case R_S_16C_24:        /* word2(0-3,8-11),word3.  */
609 
          /* if (value > 16777215 || value < 0) RELOC_ERROR(1); */
610 
          value &= 0xFFFFFF;
611 
          value = ((value & 0x0000FFFF) << 16) |
612 
            ((value & 0x000F0000) >> 8) | ((value & 0x00F00000) >> 20);
613 
          value |= left_val;
614 
          bfd_put_32 (abfd, (bfd_vma) value, (bfd_byte *) data + octets);
615 
          break;
616 
 
617 
        default:
618 
          return bfd_reloc_notsupported;
619 
        }
620 
      break;
621 
 
622 
    case R_16C_IMMED:
623 
      switch (size)
624 
        {
625 
        case R_S_16C_04:        /* word1/2(4-7).  */
626 
          if (value > 15 || value < -1)
627 
            return bfd_reloc_overflow;
628 
          value &= 0xF;
629 
          value <<= 4;
630 
          value |= left_val;
631 
          bfd_put_8 (abfd, (bfd_vma) value, (unsigned char *) data + octets);
632 
          break;
633 
 
634 
        case R_S_16C_16:        /* word2.  */
635 
          if (value > 32767 || value < -32768)
636 
            return bfd_reloc_overflow;
637 
          value &= 0xFFFF;
638 
          sword = value;
639 
          bfd_put_16 (abfd, (bfd_vma) sword,
640 
                      (unsigned char *) data + octets);
641 
          break;
642 
 
643 
        case R_S_16C_20:        /* word1(0-3),word2.  */
644 
          if (value > 1048575 || value < 0)
645 
            return bfd_reloc_overflow;
646 
          value &= 0xFFFFF;
647 
          value = ((value & 0x0000FFFF) << 16) |
648 
            ((value & 0x000F0000) >> 16);
649 
          value |= left_val;
650 
          bfd_put_32 (abfd, (bfd_vma) value, (bfd_byte *) data + octets);
651 
          break;
652 
 
653 
        case R_S_16C_32:        /* word2, word3.  */
654 
          value &= 0xFFFFFFFF;
655 
          value = ((value & 0x0000FFFF) << 16) |
656 
            ((value & 0xFFFF0000) >> 16);
657 
          bfd_put_32 (abfd, (bfd_vma) value, (bfd_byte *) data + octets);
658 
          break;
659 
 
660 
        default:
661 
          return bfd_reloc_notsupported;
662 
        }
663 
      break;
664 
    default:
665 
      return bfd_reloc_notsupported;
666 
    }
667 
 
668 
  return bfd_reloc_ok;
669 
}
670 
 
671 
/* Relocate a CR16C ELF section.  */
672 
 
673 
static bfd_boolean
674 
elf32_cr16c_relocate_section (bfd *output_bfd,
675 
                              struct bfd_link_info *info,
676 
                              bfd *input_bfd,
677 
                              asection *input_section,
678 
                              bfd_byte *contents,
679 
                              Elf_Internal_Rela *relocs,
680 
                              Elf_Internal_Sym *local_syms,
681 
                              asection **local_sections)
682 
{
683 
  Elf_Internal_Shdr *symtab_hdr;
684 
  struct elf_link_hash_entry **sym_hashes;
685 
  Elf_Internal_Rela *rel, *relend;
686 
 
687 
  symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
688 
  sym_hashes = elf_sym_hashes (input_bfd);
689 
 
690 
  rel = relocs;
691 
  relend = relocs + input_section->reloc_count;
692 
  for (; rel < relend; rel++)
693 
    {
694 
      int r_type;
695 
      reloc_howto_type *howto;
696 
      unsigned long r_symndx;
697 
      Elf_Internal_Sym *sym;
698 
      asection *sec;
699 
      struct elf_link_hash_entry *h;
700 
      bfd_vma relocation;
701 
      bfd_reloc_status_type r;
702 
 
703 
      r_symndx = ELF32_R_SYM (rel->r_info);
704 
      r_type = ELF32_R_TYPE (rel->r_info);
705 
      howto = elf_howto_table + r_type;
706 
 
707 
      h = NULL;
708 
      sym = NULL;
709 
      sec = NULL;
710 
      if (r_symndx < symtab_hdr->sh_info)
711 
        {
712 
          sym = local_syms + r_symndx;
713 
          sec = local_sections[r_symndx];
714 
          relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
715 
        }
716 
      else
717 
        {
718 
          bfd_boolean unresolved_reloc, warned;
719 
 
720 
          RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
721 
                                   r_symndx, symtab_hdr, sym_hashes,
722 
                                   h, sec, relocation,
723 
                                   unresolved_reloc, warned);
724 
        }
725 
 
726 
      if (sec != NULL && elf_discarded_section (sec))
727 
        {
728 
          /* For relocs against symbols from removed linkonce sections,
729 
             or sections discarded by a linker script, we just want the
730 
             section contents zeroed.  Avoid any special processing.  */
731 
          _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
732 
          rel->r_info = 0;
733 
          rel->r_addend = 0;
734 
          continue;
735 
        }
736 
 
737 
      if (info->relocatable)
738 
        {
739 
          /* This is a relocatable link.  We don't have to change
740 
             anything, unless the reloc is against a section symbol,
741 
             in which case we have to adjust according to where the
742 
             section symbol winds up in the output section.  */
743 
          if (sym != NULL && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
744 
            rel->r_addend += sec->output_offset;
745 
          continue;
746 
        }
747 
 
748 
      r = cr16c_elf_final_link_relocate (howto, input_bfd, output_bfd,
749 
                                         input_section,
750 
                                         contents, rel->r_offset,
751 
                                         relocation, rel->r_addend,
752 
                                         info, sec, h == NULL);
753 
 
754 
      if (r != bfd_reloc_ok)
755 
        {
756 
          const char *name;
757 
          const char *msg = (const char *) 0;
758 
 
759 
          if (h != NULL)
760 
            name = h->root.root.string;
761 
          else
762 
            {
763 
              name = (bfd_elf_string_from_elf_section
764 
                      (input_bfd, symtab_hdr->sh_link, sym->st_name));
765 
              if (name == NULL || *name == '\0')
766 
                name = bfd_section_name (input_bfd, sec);
767 
            }
768 
 
769 
          switch (r)
770 
            {
771 
            case bfd_reloc_overflow:
772 
              if (!((*info->callbacks->reloc_overflow)
773 
                    (info, (h ? &h->root : NULL), name, howto->name,
774 
                     (bfd_vma) 0, input_bfd, input_section,
775 
                     rel->r_offset)))
776 
                return FALSE;
777 
              break;
778 
 
779 
            case bfd_reloc_undefined:
780 
              if (!((*info->callbacks->undefined_symbol)
781 
                    (info, name, input_bfd, input_section,
782 
                     rel->r_offset, TRUE)))
783 
                return FALSE;
784 
              break;
785 
 
786 
            case bfd_reloc_outofrange:
787 
              msg = _("internal error: out of range error");
788 
              goto common_error;
789 
 
790 
            case bfd_reloc_notsupported:
791 
              msg = _("internal error: unsupported relocation error");
792 
              goto common_error;
793 
 
794 
            case bfd_reloc_dangerous:
795 
              msg = _("internal error: dangerous error");
796 
              goto common_error;
797 
 
798 
            default:
799 
              msg = _("internal error: unknown error");
800 
              /* fall through */
801 
 
802 
            common_error:
803 
              if (!((*info->callbacks->warning)
804 
                    (info, msg, name, input_bfd, input_section,
805 
                     rel->r_offset)))
806 
                return FALSE;
807 
              break;
808 
            }
809 
        }
810 
    }
811 
 
812 
  return TRUE;
813 
}
814 
 
815 
/* CR16C ELF uses three common sections:
816 
   One is for default common symbols (placed in usual common section).
817 
   Second is for near common symbols (placed in "ncommon" section).
818 
   Third is for far common symbols (placed in "fcommon" section).
819 
   The following implementation is based on elf32-mips architecture */
820 
 
821 
static asection  cr16c_elf_fcom_section;
822 
static asymbol   cr16c_elf_fcom_symbol;
823 
static asymbol * cr16c_elf_fcom_symbol_ptr;
824 
static asection  cr16c_elf_ncom_section;
825 
static asymbol   cr16c_elf_ncom_symbol;
826 
static asymbol * cr16c_elf_ncom_symbol_ptr;
827 
 
828 
/* Given a BFD section, try to locate the
829 
   corresponding ELF section index.  */
830 
 
831 
static bfd_boolean
832 
elf32_cr16c_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED,
833 
                                      asection *sec,
834 
                                      int *retval)
835 
{
836 
  if (strcmp (bfd_get_section_name (abfd, sec), ".fcommon") == 0)
837 
    *retval = SHN_CR16C_FCOMMON;
838 
  else if (strcmp (bfd_get_section_name (abfd, sec), ".ncommon") == 0)
839 
    *retval = SHN_CR16C_NCOMMON;
840 
  else
841 
    return FALSE;
842 
 
843 
  return TRUE;
844 
}
845 
 
846 
/* Handle the special CR16C section numbers that a symbol may use.  */
847 
 
848 
static void
849 
elf32_cr16c_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED,
850 
                               asymbol *asym)
851 
{
852 
  elf_symbol_type *elfsym = (elf_symbol_type *) asym;
853 
  unsigned int indx;
854 
 
855 
  indx = elfsym->internal_elf_sym.st_shndx;
856 
 
857 
  switch (indx)
858 
    {
859 
    case SHN_CR16C_FCOMMON:
860 
      if (cr16c_elf_fcom_section.name == NULL)
861 
        {
862 
          /* Initialize the far common section.  */
863 
          cr16c_elf_fcom_section.name = ".fcommon";
864 
          cr16c_elf_fcom_section.flags = SEC_IS_COMMON | SEC_ALLOC;
865 
          cr16c_elf_fcom_section.output_section = &cr16c_elf_fcom_section;
866 
          cr16c_elf_fcom_section.symbol = &cr16c_elf_fcom_symbol;
867 
          cr16c_elf_fcom_section.symbol_ptr_ptr = &cr16c_elf_fcom_symbol_ptr;
868 
          cr16c_elf_fcom_symbol.name = ".fcommon";
869 
          cr16c_elf_fcom_symbol.flags = BSF_SECTION_SYM;
870 
          cr16c_elf_fcom_symbol.section = &cr16c_elf_fcom_section;
871 
          cr16c_elf_fcom_symbol_ptr = &cr16c_elf_fcom_symbol;
872 
        }
873 
      asym->section = &cr16c_elf_fcom_section;
874 
      asym->value = elfsym->internal_elf_sym.st_size;
875 
      break;
876 
    case SHN_CR16C_NCOMMON:
877 
      if (cr16c_elf_ncom_section.name == NULL)
878 
        {
879 
          /* Initialize the far common section.  */
880 
          cr16c_elf_ncom_section.name = ".ncommon";
881 
          cr16c_elf_ncom_section.flags = SEC_IS_COMMON | SEC_ALLOC;
882 
          cr16c_elf_ncom_section.output_section = &cr16c_elf_ncom_section;
883 
          cr16c_elf_ncom_section.symbol = &cr16c_elf_ncom_symbol;
884 
          cr16c_elf_ncom_section.symbol_ptr_ptr = &cr16c_elf_ncom_symbol_ptr;
885 
          cr16c_elf_ncom_symbol.name = ".ncommon";
886 
          cr16c_elf_ncom_symbol.flags = BSF_SECTION_SYM;
887 
          cr16c_elf_ncom_symbol.section = &cr16c_elf_ncom_section;
888 
          cr16c_elf_ncom_symbol_ptr = &cr16c_elf_ncom_symbol;
889 
        }
890 
      asym->section = &cr16c_elf_ncom_section;
891 
      asym->value = elfsym->internal_elf_sym.st_size;
892 
      break;
893 
    }
894 
}
895 
 
896 
/* Hook called by the linker routine which adds symbols from an object
897 
   file.  We must handle the special cr16c section numbers here.  */
898 
 
899 
static bfd_boolean
900 
elf32_cr16c_add_symbol_hook (bfd *abfd,
901 
                             struct bfd_link_info *info ATTRIBUTE_UNUSED,
902 
                             Elf_Internal_Sym *sym,
903 
                             const char **namep ATTRIBUTE_UNUSED,
904 
                             flagword *flagsp ATTRIBUTE_UNUSED,
905 
                             asection **secp,
906 
                             bfd_vma *valp)
907 
{
908 
  unsigned int indx = sym->st_shndx;
909 
 
910 
  switch (indx)
911 
    {
912 
    case SHN_CR16C_FCOMMON:
913 
      *secp = bfd_make_section_old_way (abfd, ".fcommon");
914 
      (*secp)->flags |= SEC_IS_COMMON;
915 
      *valp = sym->st_size;
916 
      break;
917 
    case SHN_CR16C_NCOMMON:
918 
      *secp = bfd_make_section_old_way (abfd, ".ncommon");
919 
      (*secp)->flags |= SEC_IS_COMMON;
920 
      *valp = sym->st_size;
921 
      break;
922 
    }
923 
 
924 
  return TRUE;
925 
}
926 
 
927 
static int
928 
elf32_cr16c_link_output_symbol_hook (struct bfd_link_info *info ATTRIBUTE_UNUSED,
929 
                                     const char *name ATTRIBUTE_UNUSED,
930 
                                     Elf_Internal_Sym *sym,
931 
                                     asection *input_sec,
932 
                                     struct elf_link_hash_entry *h ATTRIBUTE_UNUSED)
933 
{
934 
  /* If we see a common symbol, which implies a relocatable link, then
935 
     if a symbol was in a special common section in an input file, mark
936 
     it as a special common in the output file.  */
937 
 
938 
  if (sym->st_shndx == SHN_COMMON)
939 
    {
940 
      if (strcmp (input_sec->name, ".fcommon") == 0)
941 
        sym->st_shndx = SHN_CR16C_FCOMMON;
942 
      else if (strcmp (input_sec->name, ".ncommon") == 0)
943 
        sym->st_shndx = SHN_CR16C_NCOMMON;
944 
    }
945 
 
946 
  return 1;
947 
}
948 
 
949 
/* Definitions for setting CR16C target vector.  */
950 
#define TARGET_LITTLE_SYM               bfd_elf32_cr16c_vec
951 
#define TARGET_LITTLE_NAME              "elf32-cr16c"
952 
#define ELF_ARCH                        bfd_arch_cr16c
953 
#define ELF_MACHINE_CODE                EM_CR
954 
#define ELF_MAXPAGESIZE                 0x1
955 
#define elf_symbol_leading_char         '_'
956 
 
957 
#define bfd_elf32_bfd_reloc_type_lookup         elf_cr16c_reloc_type_lookup
958 
#define bfd_elf32_bfd_reloc_name_lookup elf_cr16c_reloc_name_lookup
959 
#define elf_info_to_howto                       elf_cr16c_info_to_howto
960 
#define elf_info_to_howto_rel                   elf_cr16c_info_to_howto_rel
961 
#define elf_backend_relocate_section            elf32_cr16c_relocate_section
962 
#define elf_backend_symbol_processing           elf32_cr16c_symbol_processing
963 
#define elf_backend_section_from_bfd_section    elf32_cr16c_section_from_bfd_section
964 
#define elf_backend_add_symbol_hook             elf32_cr16c_add_symbol_hook
965 
#define elf_backend_link_output_symbol_hook     elf32_cr16c_link_output_symbol_hook
966 
 
967 
#define elf_backend_can_gc_sections     1
968 
 
969 
#include "elf32-target.h"

powered by: WebSVN 2.1.0

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