1 /* CRIS-specific support for 32-bit ELF.
2    Copyright (C) 2000-2014 Free Software Foundation, Inc.
3    Contributed by Axis Communications AB.
4    Written by Hans-Peter Nilsson, based on elf32-fr30.c
5    PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
6 
7    This file is part of BFD, the Binary File Descriptor library.
8 
9    This program is free software; you can redistribute it and/or modify
10    it under the terms of the GNU General Public License as published by
11    the Free Software Foundation; either version 3 of the License, or
12    (at your option) any later version.
13 
14    This program is distributed in the hope that it will be useful,
15    but WITHOUT ANY WARRANTY; without even the implied warranty of
16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17    GNU General Public License for more details.
18 
19    You should have received a copy of the GNU General Public License
20    along with this program; if not, write to the Free Software
21    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
22    MA 02110-1301, USA.  */
23 
24 #include "sysdep.h"
25 #include "bfd.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28 #include "elf/cris.h"
29 #include <limits.h>
30 
31 bfd_reloc_status_type
32 cris_elf_pcrel_reloc (bfd *, arelent *, asymbol *, void *,
33 		      asection *, bfd *, char **);
34 static bfd_boolean
35 cris_elf_set_mach_from_flags (bfd *, unsigned long);
36 
37 /* Forward declarations.  */
38 static reloc_howto_type cris_elf_howto_table [] =
39 {
40   /* This reloc does nothing.  */
41   HOWTO (R_CRIS_NONE,		/* type */
42 	 0,			/* rightshift */
43 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
44 	 32,			/* bitsize */
45 	 FALSE,			/* pc_relative */
46 	 0,			/* bitpos */
47 	 complain_overflow_bitfield, /* complain_on_overflow */
48 	 bfd_elf_generic_reloc,	/* special_function */
49 	 "R_CRIS_NONE",		/* name */
50 	 FALSE,			/* partial_inplace */
51 	 0,			/* src_mask */
52 	 0,			/* dst_mask */
53 	 FALSE),		/* pcrel_offset */
54 
55   /* An 8 bit absolute relocation.  */
56   HOWTO (R_CRIS_8,		/* type */
57 	 0,			/* rightshift */
58 	 0,			/* size (0 = byte, 1 = short, 2 = long) */
59 	 8,			/* bitsize */
60 	 FALSE,			/* pc_relative */
61 	 0,			/* bitpos */
62 	 complain_overflow_bitfield, /* complain_on_overflow */
63 	 bfd_elf_generic_reloc,	/* special_function */
64 	 "R_CRIS_8",		/* name */
65 	 FALSE,			/* partial_inplace */
66 	 0x0000,		/* src_mask */
67 	 0x00ff,		/* dst_mask */
68 	 FALSE),		/* pcrel_offset */
69 
70   /* A 16 bit absolute relocation.  */
71   HOWTO (R_CRIS_16,		/* type */
72 	 0,			/* rightshift */
73 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
74 	 16,			/* bitsize */
75 	 FALSE,			/* pc_relative */
76 	 0,			/* bitpos */
77 	 complain_overflow_bitfield, /* complain_on_overflow */
78 	 bfd_elf_generic_reloc,	/* special_function */
79 	 "R_CRIS_16",		/* name */
80 	 FALSE,			/* partial_inplace */
81 	 0x00000000,		/* src_mask */
82 	 0x0000ffff,		/* dst_mask */
83 	 FALSE),		/* pcrel_offset */
84 
85   /* A 32 bit absolute relocation.  */
86   HOWTO (R_CRIS_32,		/* type */
87 	 0,			/* rightshift */
88 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
89 	 32,			/* bitsize */
90 	 FALSE,			/* pc_relative */
91 	 0,			/* bitpos */
92 	 /* We don't want overflow complaints for 64-bit vma builds
93 	    for e.g. sym+0x40000000 (or actually sym-0xc0000000 in
94 	    32-bit ELF) where sym=0xc0001234.
95 	    Don't do this for the PIC relocs, as we don't expect to
96 	    see them with large offsets.  */
97 	 complain_overflow_dont, /* complain_on_overflow */
98 	 bfd_elf_generic_reloc,	/* special_function */
99 	 "R_CRIS_32",		/* name */
100 	 FALSE,			/* partial_inplace */
101 	 0x00000000,		/* src_mask */
102 	 0xffffffff,		/* dst_mask */
103 	 FALSE),		/* pcrel_offset */
104 
105   /* An 8 bit PC-relative relocation.  */
106   HOWTO (R_CRIS_8_PCREL,	/* type */
107 	 0,			/* rightshift */
108 	 0,			/* size (0 = byte, 1 = short, 2 = long) */
109 	 8,			/* bitsize */
110 	 TRUE,			/* pc_relative */
111 	 0,			/* bitpos */
112 	 complain_overflow_bitfield, /* complain_on_overflow */
113 	 cris_elf_pcrel_reloc,	/* special_function */
114 	 "R_CRIS_8_PCREL",	/* name */
115 	 FALSE,			/* partial_inplace */
116 	 0x0000,		/* src_mask */
117 	 0x00ff,		/* dst_mask */
118 	 TRUE),			/* pcrel_offset */
119 
120   /* A 16 bit PC-relative relocation.  */
121   HOWTO (R_CRIS_16_PCREL,	/* type */
122 	 0,			/* rightshift */
123 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
124 	 16,			/* bitsize */
125 	 TRUE,			/* pc_relative */
126 	 0,			/* bitpos */
127 	 complain_overflow_bitfield, /* complain_on_overflow */
128 	 cris_elf_pcrel_reloc,	/* special_function */
129 	 "R_CRIS_16_PCREL",	/* name */
130 	 FALSE,			/* partial_inplace */
131 	 0x00000000,		/* src_mask */
132 	 0x0000ffff,		/* dst_mask */
133 	 TRUE),			/* pcrel_offset */
134 
135   /* A 32 bit PC-relative relocation.  */
136   HOWTO (R_CRIS_32_PCREL,	/* type */
137 	 0,			/* rightshift */
138 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
139 	 32,			/* bitsize */
140 	 TRUE,			/* pc_relative */
141 	 0,			/* bitpos */
142 	 complain_overflow_bitfield, /* complain_on_overflow */
143 	 cris_elf_pcrel_reloc,	/* special_function */
144 	 "R_CRIS_32_PCREL",	/* name */
145 	 FALSE,			/* partial_inplace */
146 	 0x00000000,		/* src_mask */
147 	 0xffffffff,		/* dst_mask */
148 	 TRUE),			/* pcrel_offset */
149 
150   /* GNU extension to record C++ vtable hierarchy.  */
151   HOWTO (R_CRIS_GNU_VTINHERIT,	/* type */
152 	 0,			/* rightshift */
153 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
154 	 0,			/* bitsize */
155 	 FALSE,			/* pc_relative */
156 	 0,			/* bitpos */
157 	 complain_overflow_dont, /* complain_on_overflow */
158 	 NULL,			/* special_function */
159 	 "R_CRIS_GNU_VTINHERIT", /* name */
160 	 FALSE,			/* partial_inplace */
161 	 0,			/* src_mask */
162 	 0,			/* dst_mask */
163 	 FALSE),		/* pcrel_offset */
164 
165   /* GNU extension to record C++ vtable member usage.  */
166   HOWTO (R_CRIS_GNU_VTENTRY,	/* type */
167 	 0,			/* rightshift */
168 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
169 	 0,			/* bitsize */
170 	 FALSE,			/* pc_relative */
171 	 0,			/* bitpos */
172 	 complain_overflow_dont, /* complain_on_overflow */
173 	 _bfd_elf_rel_vtable_reloc_fn,	/* special_function */
174 	 "R_CRIS_GNU_VTENTRY",	 /* name */
175 	 FALSE,			/* partial_inplace */
176 	 0,			/* src_mask */
177 	 0,			/* dst_mask */
178 	 FALSE),		/* pcrel_offset */
179 
180   /* This is used only by the dynamic linker.  The symbol should exist
181      both in the object being run and in some shared library.  The
182      dynamic linker copies the data addressed by the symbol from the
183      shared library into the object, because the object being
184      run has to have the data at some particular address.  */
185   HOWTO (R_CRIS_COPY,		/* type */
186 	 0,			/* rightshift */
187 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
188 	 32,			/* bitsize */
189 	 FALSE,			/* pc_relative */
190 	 0,			/* bitpos */
191 	 complain_overflow_bitfield, /* complain_on_overflow */
192 	 bfd_elf_generic_reloc,	/* special_function */
193 	 "R_CRIS_COPY",		/* name */
194 	 FALSE,			/* partial_inplace */
195 	 0,			/* src_mask */
196 	 0,			/* dst_mask */
197 	 FALSE),		/* pcrel_offset */
198 
199   /* Like R_CRIS_32, but used when setting global offset table entries.  */
200   HOWTO (R_CRIS_GLOB_DAT,	/* type */
201 	 0,			/* rightshift */
202 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
203 	 32,			/* bitsize */
204 	 FALSE,			/* pc_relative */
205 	 0,			/* bitpos */
206 	 complain_overflow_bitfield, /* complain_on_overflow */
207 	 bfd_elf_generic_reloc,	/* special_function */
208 	 "R_CRIS_GLOB_DAT",	/* name */
209 	 FALSE,			/* partial_inplace */
210 	 0,			/* src_mask */
211 	 0xffffffff,		/* dst_mask */
212 	 FALSE),		/* pcrel_offset */
213 
214   /* Marks a procedure linkage table entry for a symbol.  */
215   HOWTO (R_CRIS_JUMP_SLOT,	/* type */
216 	 0,			/* rightshift */
217 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
218 	 32,			/* bitsize */
219 	 FALSE,			/* pc_relative */
220 	 0,			/* bitpos */
221 	 complain_overflow_bitfield, /* complain_on_overflow */
222 	 bfd_elf_generic_reloc,	/* special_function */
223 	 "R_CRIS_JUMP_SLOT",	/* name */
224 	 FALSE,			/* partial_inplace */
225 	 0,			/* src_mask */
226 	 0,			/* dst_mask */
227 	 FALSE),		/* pcrel_offset */
228 
229   /* Used only by the dynamic linker.  When the object is run, this
230      longword is set to the load address of the object, plus the
231      addend.  */
232   HOWTO (R_CRIS_RELATIVE,	/* type */
233 	 0,			/* rightshift */
234 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
235 	 32,			/* bitsize */
236 	 FALSE,			/* pc_relative */
237 	 0,			/* bitpos */
238 	 complain_overflow_bitfield, /* complain_on_overflow */
239 	 bfd_elf_generic_reloc,	/* special_function */
240 	 "R_CRIS_RELATIVE",	/* name */
241 	 FALSE,			/* partial_inplace */
242 	 0,			/* src_mask */
243 	 0xffffffff,		/* dst_mask */
244 	 FALSE),		/* pcrel_offset */
245 
246   /* Like R_CRIS_32, but referring to the GOT table entry for the symbol.  */
247   HOWTO (R_CRIS_16_GOT,		/* type */
248 	 0,			/* rightshift */
249 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
250 	 16,			/* bitsize */
251 	 FALSE,			/* pc_relative */
252 	 0,			/* bitpos */
253 	 complain_overflow_bitfield, /* complain_on_overflow */
254 	 bfd_elf_generic_reloc,	/* special_function */
255 	 "R_CRIS_16_GOT",	/* name */
256 	 FALSE,			/* partial_inplace */
257 	 0,			/* src_mask */
258 	 0xffff,		/* dst_mask */
259 	 FALSE),		/* pcrel_offset */
260 
261   HOWTO (R_CRIS_32_GOT,		/* type */
262 	 0,			/* rightshift */
263 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
264 	 32,			/* bitsize */
265 	 FALSE,			/* pc_relative */
266 	 0,			/* bitpos */
267 	 complain_overflow_bitfield, /* complain_on_overflow */
268 	 bfd_elf_generic_reloc,	/* special_function */
269 	 "R_CRIS_32_GOT",	/* name */
270 	 FALSE,			/* partial_inplace */
271 	 0,			/* src_mask */
272 	 0xffffffff,		/* dst_mask */
273 	 FALSE),		/* pcrel_offset */
274 
275   /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
276      the GOT table for the symbol.  */
277   HOWTO (R_CRIS_16_GOTPLT,	/* type */
278 	 0,			/* rightshift */
279 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
280 	 16,			/* bitsize */
281 	 FALSE,			/* pc_relative */
282 	 0,			/* bitpos */
283 	 complain_overflow_bitfield, /* complain_on_overflow */
284 	 bfd_elf_generic_reloc,	/* special_function */
285 	 "R_CRIS_16_GOTPLT",	/* name */
286 	 FALSE,			/* partial_inplace */
287 	 0,			/* src_mask */
288 	 0xffff,		/* dst_mask */
289 	 FALSE),		/* pcrel_offset */
290 
291   HOWTO (R_CRIS_32_GOTPLT,	/* type */
292 	 0,			/* rightshift */
293 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
294 	 32,			/* bitsize */
295 	 FALSE,			/* pc_relative */
296 	 0,			/* bitpos */
297 	 complain_overflow_bitfield, /* complain_on_overflow */
298 	 bfd_elf_generic_reloc,	/* special_function */
299 	 "R_CRIS_32_GOTPLT",	/* name */
300 	 FALSE,			/* partial_inplace */
301 	 0,			/* src_mask */
302 	 0xffffffff,		/* dst_mask */
303 	 FALSE),		/* pcrel_offset */
304 
305   /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
306      be necessary.  */
307   HOWTO (R_CRIS_32_GOTREL,	/* type */
308 	 0,			/* rightshift */
309 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
310 	 32,			/* bitsize */
311 	 FALSE,			/* pc_relative */
312 	 0,			/* bitpos */
313 	 complain_overflow_bitfield, /* complain_on_overflow */
314 	 bfd_elf_generic_reloc,	/* special_function */
315 	 "R_CRIS_32_GOTREL",	/* name */
316 	 FALSE,			/* partial_inplace */
317 	 0,			/* src_mask */
318 	 0xffffffff,		/* dst_mask */
319 	 FALSE),		/* pcrel_offset */
320 
321   /* A 32-bit offset from GOT to entry for this symbol in PLT and request
322      to create PLT entry for symbol.  */
323   HOWTO (R_CRIS_32_PLT_GOTREL,	/* type */
324 	 0,			/* rightshift */
325 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
326 	 32,			/* bitsize */
327 	 FALSE,			/* pc_relative */
328 	 0,			/* bitpos */
329 	 complain_overflow_bitfield, /* complain_on_overflow */
330 	 bfd_elf_generic_reloc,	/* special_function */
331 	 "R_CRIS_32_PLT_GOTREL", /* name */
332 	 FALSE,			/* partial_inplace */
333 	 0,			/* src_mask */
334 	 0xffffffff,		/* dst_mask */
335 	 FALSE),		/* pcrel_offset */
336 
337   /* A 32-bit offset from PC (location after the relocation) + addend to
338      entry for this symbol in PLT and request to create PLT entry for
339      symbol.  */
340   HOWTO (R_CRIS_32_PLT_PCREL,	/* type */
341 	 0,			/* rightshift */
342 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
343 	 32,			/* bitsize */
344 	 TRUE,			/* pc_relative */
345 	 0,			/* bitpos */
346 	 complain_overflow_bitfield, /* complain_on_overflow */
347 	 cris_elf_pcrel_reloc,	/* special_function */
348 	 "R_CRIS_32_PLT_PCREL",	/* name */
349 	 FALSE,			/* partial_inplace */
350 	 0,			/* src_mask */
351 	 0xffffffff,		/* dst_mask */
352 	 TRUE),			/* pcrel_offset */
353 
354   /* We don't handle these in any special manner and cross-format
355      linking is not supported; just recognize them enough to pass them
356      around.  FIXME: do the same for most PIC relocs and add sanity
357      tests to actually refuse gracefully to handle these and PIC
358      relocs for cross-format linking.  */
359 #define TLSHOWTO32(name) \
360  HOWTO (name, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, \
361         bfd_elf_generic_reloc, #name, FALSE, 0, 0xffffffff, FALSE)
362 #define TLSHOWTO16X(name, X)	     \
363  HOWTO (name, 0, 1, 16, FALSE, 0, complain_overflow_ ## X, \
364         bfd_elf_generic_reloc, #name, FALSE, 0, 0xffff, FALSE)
365 #define TLSHOWTO16(name) TLSHOWTO16X(name, unsigned)
366 #define TLSHOWTO16S(name) TLSHOWTO16X(name, signed)
367 
368   TLSHOWTO32 (R_CRIS_32_GOT_GD),
369   TLSHOWTO16 (R_CRIS_16_GOT_GD),
370   TLSHOWTO32 (R_CRIS_32_GD),
371   TLSHOWTO32 (R_CRIS_DTP),
372   TLSHOWTO32 (R_CRIS_32_DTPREL),
373   TLSHOWTO16S (R_CRIS_16_DTPREL),
374   TLSHOWTO32 (R_CRIS_32_GOT_TPREL),
375   TLSHOWTO16S (R_CRIS_16_GOT_TPREL),
376   TLSHOWTO32 (R_CRIS_32_TPREL),
377   TLSHOWTO16S (R_CRIS_16_TPREL),
378   TLSHOWTO32 (R_CRIS_DTPMOD),
379   TLSHOWTO32 (R_CRIS_32_IE)
380 };
381 
382 /* Map BFD reloc types to CRIS ELF reloc types.  */
383 
384 struct cris_reloc_map
385 {
386   bfd_reloc_code_real_type bfd_reloc_val;
387   unsigned int cris_reloc_val;
388 };
389 
390 static const struct cris_reloc_map cris_reloc_map [] =
391 {
392   { BFD_RELOC_NONE,		R_CRIS_NONE },
393   { BFD_RELOC_8,		R_CRIS_8 },
394   { BFD_RELOC_16,		R_CRIS_16 },
395   { BFD_RELOC_32,		R_CRIS_32 },
396   { BFD_RELOC_8_PCREL,		R_CRIS_8_PCREL },
397   { BFD_RELOC_16_PCREL,		R_CRIS_16_PCREL },
398   { BFD_RELOC_32_PCREL,		R_CRIS_32_PCREL },
399   { BFD_RELOC_VTABLE_INHERIT,	R_CRIS_GNU_VTINHERIT },
400   { BFD_RELOC_VTABLE_ENTRY,	R_CRIS_GNU_VTENTRY },
401   { BFD_RELOC_CRIS_COPY,	R_CRIS_COPY },
402   { BFD_RELOC_CRIS_GLOB_DAT,	R_CRIS_GLOB_DAT },
403   { BFD_RELOC_CRIS_JUMP_SLOT,	R_CRIS_JUMP_SLOT },
404   { BFD_RELOC_CRIS_RELATIVE,	R_CRIS_RELATIVE },
405   { BFD_RELOC_CRIS_16_GOT,	R_CRIS_16_GOT },
406   { BFD_RELOC_CRIS_32_GOT,	R_CRIS_32_GOT },
407   { BFD_RELOC_CRIS_16_GOTPLT,	R_CRIS_16_GOTPLT },
408   { BFD_RELOC_CRIS_32_GOTPLT,	R_CRIS_32_GOTPLT },
409   { BFD_RELOC_CRIS_32_GOTREL,	R_CRIS_32_GOTREL },
410   { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
411   { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL },
412   { BFD_RELOC_CRIS_32_GOT_GD,	R_CRIS_32_GOT_GD },
413   { BFD_RELOC_CRIS_16_GOT_GD,	R_CRIS_16_GOT_GD },
414   { BFD_RELOC_CRIS_32_GD,	R_CRIS_32_GD },
415   { BFD_RELOC_CRIS_DTP,	R_CRIS_DTP },
416   { BFD_RELOC_CRIS_32_DTPREL,	R_CRIS_32_DTPREL },
417   { BFD_RELOC_CRIS_16_DTPREL,	R_CRIS_16_DTPREL },
418   { BFD_RELOC_CRIS_32_GOT_TPREL, R_CRIS_32_GOT_TPREL },
419   { BFD_RELOC_CRIS_16_GOT_TPREL, R_CRIS_16_GOT_TPREL },
420   { BFD_RELOC_CRIS_32_TPREL,	R_CRIS_32_TPREL },
421   { BFD_RELOC_CRIS_16_TPREL,	R_CRIS_16_TPREL },
422   { BFD_RELOC_CRIS_DTPMOD,	R_CRIS_DTPMOD },
423   { BFD_RELOC_CRIS_32_IE,	R_CRIS_32_IE }
424 };
425 
426 static reloc_howto_type *
cris_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)427 cris_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED,
428 			bfd_reloc_code_real_type code)
429 {
430   unsigned int i;
431 
432   for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
433     if (cris_reloc_map [i].bfd_reloc_val == code)
434       return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
435 
436   return NULL;
437 }
438 
439 static reloc_howto_type *
cris_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)440 cris_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
441 {
442   unsigned int i;
443 
444   for (i = 0;
445        i < sizeof (cris_elf_howto_table) / sizeof (cris_elf_howto_table[0]);
446        i++)
447     if (cris_elf_howto_table[i].name != NULL
448 	&& strcasecmp (cris_elf_howto_table[i].name, r_name) == 0)
449       return &cris_elf_howto_table[i];
450 
451   return NULL;
452 }
453 
454 /* Set the howto pointer for an CRIS ELF reloc.  */
455 
456 static void
cris_info_to_howto_rela(bfd * abfd ATTRIBUTE_UNUSED,arelent * cache_ptr,Elf_Internal_Rela * dst)457 cris_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
458 			 arelent * cache_ptr,
459 			 Elf_Internal_Rela * dst)
460 {
461   enum elf_cris_reloc_type r_type;
462 
463   r_type = ELF32_R_TYPE (dst->r_info);
464   BFD_ASSERT (r_type < (unsigned int) R_CRIS_max);
465   cache_ptr->howto = & cris_elf_howto_table [r_type];
466 }
467 
468 bfd_reloc_status_type
cris_elf_pcrel_reloc(bfd * abfd ATTRIBUTE_UNUSED,arelent * reloc_entry,asymbol * symbol,void * data ATTRIBUTE_UNUSED,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)469 cris_elf_pcrel_reloc (bfd *abfd ATTRIBUTE_UNUSED,
470 		      arelent *reloc_entry,
471 		      asymbol *symbol,
472 		      void * data ATTRIBUTE_UNUSED,
473 		      asection *input_section,
474 		      bfd *output_bfd,
475 		      char **error_message ATTRIBUTE_UNUSED)
476 {
477   /* By default (using only bfd_elf_generic_reloc when linking to
478      non-ELF formats) PC-relative relocs are relative to the beginning
479      of the reloc.  CRIS PC-relative relocs are relative to the position
480      *after* the reloc because that's what pre-CRISv32 PC points to
481      after reading an insn field with that reloc.  (For CRISv32, PC is
482      actually relative to the start of the insn, but we keep the old
483      definition.)  Still, we use as much generic machinery as we can.
484 
485      Only adjust when doing a final link.  */
486   if (output_bfd == (bfd *) NULL)
487     reloc_entry->addend -= 1 << reloc_entry->howto->size;
488 
489   return
490     bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
491 			   input_section, output_bfd, error_message);
492 }
493 
494 /* Support for core dump NOTE sections.
495    The slightly unintuitive code layout is an attempt to keep at least
496    some similarities with other ports, hoping to simplify general
497    changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart.  */
498 
499 static bfd_boolean
cris_elf_grok_prstatus(bfd * abfd,Elf_Internal_Note * note)500 cris_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
501 {
502   int offset;
503   size_t size;
504 
505   if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
506     switch (note->descsz)
507       {
508       default:
509 	return FALSE;
510 
511       case 202:		/* Linux/CRISv32 */
512 	/* pr_cursig */
513 	elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
514 
515 	/* pr_pid */
516 	elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
517 
518 	/* pr_reg */
519 	offset = 70;
520 	size = 128;
521 
522 	break;
523       }
524   else
525     switch (note->descsz)
526       {
527       default:
528 	return FALSE;
529 
530       case 214:		/* Linux/CRIS */
531 	/* pr_cursig */
532 	elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
533 
534 	/* pr_pid */
535 	elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
536 
537 	/* pr_reg */
538 	offset = 70;
539 	size = 140;
540 
541 	break;
542       }
543 
544   /* Make a ".reg/999" section.  */
545   return _bfd_elfcore_make_pseudosection (abfd, ".reg",
546 					  size, note->descpos + offset);
547 }
548 
549 static bfd_boolean
cris_elf_grok_psinfo(bfd * abfd,Elf_Internal_Note * note)550 cris_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
551 {
552   if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
553     switch (note->descsz)
554       {
555       default:
556 	return FALSE;
557 
558       case 124:		/* Linux/CRISv32 elf_prpsinfo */
559 	elf_tdata (abfd)->core->program
560 	  = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
561 	elf_tdata (abfd)->core->command
562 	  = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
563       }
564   else
565     switch (note->descsz)
566       {
567       default:
568 	return FALSE;
569 
570       case 124:		/* Linux/CRIS elf_prpsinfo */
571 	elf_tdata (abfd)->core->program
572 	  = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
573 	elf_tdata (abfd)->core->command
574 	  = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
575       }
576 
577   /* Note that for some reason, a spurious space is tacked
578      onto the end of the args in some (at least one anyway)
579      implementations, so strip it off if it exists.  */
580 
581   {
582     char *command = elf_tdata (abfd)->core->command;
583     int n = strlen (command);
584 
585     if (0 < n && command[n - 1] == ' ')
586       command[n - 1] = '\0';
587   }
588 
589   return TRUE;
590 }
591 
592 /* The name of the dynamic interpreter.  This is put in the .interp
593    section.  */
594 
595 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
596 
597 /* The size in bytes of an entry in the procedure linkage table.  */
598 
599 #define PLT_ENTRY_SIZE 20
600 #define PLT_ENTRY_SIZE_V32 26
601 
602 /* The first entry in an absolute procedure linkage table looks like this.  */
603 
604 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
605 {
606   0xfc, 0xe1,
607   0x7e, 0x7e,	/* push mof.  */
608   0x7f, 0x0d,   /*  (dip [pc+]) */
609   0, 0, 0, 0,	/*  Replaced with address of .got + 4.  */
610   0x30, 0x7a,	/* move [...],mof */
611   0x7f, 0x0d,   /*  (dip [pc+]) */
612   0, 0, 0, 0,	/*  Replaced with address of .got + 8.  */
613   0x30, 0x09	/* jump [...] */
614 };
615 
616 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
617 {
618   0x84, 0xe2,	/* subq 4,$sp */
619   0x6f, 0xfe,	/* move.d 0,$acr */
620   0, 0, 0, 0,	/*  Replaced by address of .got + 4.  */
621   0x7e, 0x7a,	/* move $mof,[$sp] */
622   0x3f, 0x7a,	/* move [$acr],$mof */
623   0x04, 0xf2,	/* addq 4,acr */
624   0x6f, 0xfa,	/* move.d [$acr],$acr */
625   0xbf, 0x09,	/* jump $acr */
626   0xb0, 0x05,	/* nop */
627   0, 0		/*  Pad out to 26 bytes.  */
628 };
629 
630 /* Subsequent entries in an absolute procedure linkage table look like
631    this.  */
632 
633 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
634 {
635   0x7f, 0x0d,   /*  (dip [pc+]) */
636   0, 0, 0, 0,	/*  Replaced with address of this symbol in .got.  */
637   0x30, 0x09,	/* jump [...] */
638   0x3f,	 0x7e,	/* move [pc+],mof */
639   0, 0, 0, 0,	/*  Replaced with offset into relocation table.  */
640   0x2f, 0xfe,	/* add.d [pc+],pc */
641   0xec, 0xff,
642   0xff, 0xff	/*  Replaced with offset to start of .plt.  */
643 };
644 
645 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
646 {
647   0x6f, 0xfe,	/* move.d 0,$acr */
648   0, 0, 0, 0,	/*  Replaced with address of this symbol in .got.  */
649   0x6f, 0xfa,   /* move.d [$acr],$acr */
650   0xbf, 0x09,   /* jump $acr */
651   0xb0, 0x05,	/* nop */
652   0x3f, 0x7e,	/* move 0,mof */
653   0, 0, 0, 0,	/*  Replaced with offset into relocation table. */
654   0xbf, 0x0e,	/* ba start_of_plt0_entry */
655   0, 0, 0, 0,	/*  Replaced with offset to plt0 entry.  */
656   0xb0, 0x05	/* nop */
657 };
658 
659 /* The first entry in a PIC procedure linkage table looks like this.  */
660 
661 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
662 {
663   0xfc, 0xe1, 0x7e, 0x7e,	/* push mof */
664   0x04, 0x01, 0x30, 0x7a,	/* move [r0+4],mof */
665   0x08, 0x01, 0x30, 0x09,	/* jump [r0+8] */
666   0, 0, 0, 0, 0, 0, 0, 0,	/*  Pad out to 20 bytes.  */
667 };
668 
669 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
670 {
671   0x84, 0xe2,	/* subq 4,$sp */
672   0x04, 0x01,	/* addoq 4,$r0,$acr */
673   0x7e, 0x7a,	/* move $mof,[$sp] */
674   0x3f, 0x7a,	/* move [$acr],$mof */
675   0x04, 0xf2,	/* addq 4,$acr */
676   0x6f, 0xfa,	/* move.d [$acr],$acr */
677   0xbf, 0x09,	/* jump $acr */
678   0xb0, 0x05,	/* nop */
679   0, 0,		/*  Pad out to 26 bytes.  */
680   0, 0, 0, 0,
681   0, 0, 0, 0
682 };
683 
684 /* Subsequent entries in a PIC procedure linkage table look like this.  */
685 
686 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
687 {
688   0x6f, 0x0d,   /*  (bdap [pc+].d,r0) */
689   0, 0, 0, 0,	/*  Replaced with offset of this symbol in .got.  */
690   0x30, 0x09,	/* jump [...] */
691   0x3f, 0x7e,	/* move [pc+],mof */
692   0, 0, 0, 0,	/*  Replaced with offset into relocation table.  */
693   0x2f, 0xfe,	/* add.d [pc+],pc */
694   0xec, 0xff,	/*  Replaced with offset to start of .plt.  */
695   0xff, 0xff
696 };
697 
698 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
699 {
700   0x6f, 0x0d,	/* addo.d 0,$r0,$acr */
701   0, 0, 0, 0,	/*  Replaced with offset of this symbol in .got.  */
702   0x6f, 0xfa,	/* move.d [$acr],$acr */
703   0xbf, 0x09,	/* jump $acr */
704   0xb0, 0x05,	/* nop */
705   0x3f, 0x7e,	/* move relocoffs,$mof */
706   0, 0, 0, 0,	/*  Replaced with offset into relocation table.  */
707   0xbf, 0x0e,	/* ba start_of_plt */
708   0, 0, 0, 0,	/*  Replaced with offset to start of .plt.  */
709   0xb0, 0x05	/* nop */
710 };
711 
712 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
713    (and most other PIC/shlib stuff).  Check that we don't drift away
714    without reason.
715 
716    The CRIS linker, like the m68k and i386 linkers (and probably the rest
717    too) needs to keep track of the number of relocs that it decides to
718    copy in check_relocs for each symbol.  This is so that it can discard
719    PC relative relocs if it doesn't need them when linking with
720    -Bsymbolic.  We store the information in a field extending the regular
721    ELF linker hash table.  */
722 
723 /* This structure keeps track of the number of PC relative relocs we have
724    copied for a given symbol.  */
725 
726 struct elf_cris_pcrel_relocs_copied
727 {
728   /* Next section.  */
729   struct elf_cris_pcrel_relocs_copied *next;
730 
731   /* A section in dynobj.  */
732   asection *section;
733 
734   /* Number of relocs copied in this section.  */
735   bfd_size_type count;
736 
737   /* Example of reloc being copied, for message.  */
738   enum elf_cris_reloc_type r_type;
739 };
740 
741 /* CRIS ELF linker hash entry.  */
742 
743 struct elf_cris_link_hash_entry
744 {
745   struct elf_link_hash_entry root;
746 
747   /* Number of PC relative relocs copied for this symbol.  */
748   struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
749 
750   /* The GOTPLT references are CRIS-specific; the goal is to avoid having
751      both a general GOT and a PLT-specific GOT entry for the same symbol,
752      when it is referenced both as a function and as a function pointer.
753 
754      Number of GOTPLT references for a function.  */
755   bfd_signed_vma gotplt_refcount;
756 
757   /* Actual GOTPLT index for this symbol, if applicable, or zero if not
758      (zero is never used as an index).  FIXME: We should be able to fold
759      this with gotplt_refcount in a union, like the got and plt unions in
760      elf_link_hash_entry.  */
761   bfd_size_type gotplt_offset;
762 
763   /* The root.got.refcount is the sum of the regular reference counts
764      (this) and those members below.  We have to keep a separate count
765      to track when we've found the first (or last) reference to a
766      regular got entry.  The offset is in root.got.offset.  */
767   bfd_signed_vma reg_got_refcount;
768 
769   /* Similar to the above, the number of reloc references to this
770      symbols that need a R_CRIS_32_TPREL slot.  The offset is in
771      root.got.offset, because this and .dtp_refcount can't validly
772      happen when there's also a regular GOT entry; that's invalid
773      input for which an error is emitted.  */
774   bfd_signed_vma tprel_refcount;
775 
776   /* Similar to the above, the number of reloc references to this
777      symbols that need a R_CRIS_DTP slot.  The offset is in
778      root.got.offset; plus 4 if .tprel_refcount > 0.  */
779   bfd_signed_vma dtp_refcount;
780 };
781 
782 static bfd_boolean
783 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *,
784 				      void * );
785 static bfd_boolean
786 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *,
787 					  void *);
788 
789 /* The local_got_refcounts and local_got_offsets are a multiple of
790    LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the
791    refcount for GOT itself, see code), with the summary / group offset
792    for local symbols located at offset N, reference counts for
793    ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP
794    relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N +
795    3*LSNUM.  */
796 
797 #define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info)
798 #define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info)
799 #define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info)
800 #define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4)
801 
802 /* CRIS ELF linker hash table.  */
803 
804 struct elf_cris_link_hash_table
805 {
806   struct elf_link_hash_table root;
807 
808   /* We can't use the PLT offset and calculate to get the GOTPLT offset,
809      since we try and avoid creating GOTPLT:s when there's already a GOT.
810      Instead, we keep and update the next available index here.  */
811   bfd_size_type next_gotplt_entry;
812 
813   /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have
814      been seen for any input; if != 0, then the constant-offset
815      R_CRIS_DTPMOD is needed for this DSO/executable.  This turns
816      negative at relocation, so that we don't need an extra flag for
817      when the reloc is output.  */
818   bfd_signed_vma dtpmod_refcount;
819 };
820 
821 /* Traverse a CRIS ELF linker hash table.  */
822 
823 #define elf_cris_link_hash_traverse(table, func, info)			\
824   (elf_link_hash_traverse						\
825    (&(table)->root,							\
826     (bfd_boolean (*) (struct elf_link_hash_entry *, void *)) (func),	\
827     (info)))
828 
829 /* Get the CRIS ELF linker hash table from a link_info structure.  */
830 
831 #define elf_cris_hash_table(p) \
832   (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
833   == CRIS_ELF_DATA ? ((struct elf_cris_link_hash_table *) ((p)->hash)) : NULL)
834 
835 /* Get the CRIS ELF linker hash entry from a regular hash entry (the
836    "parent class").  The .root reference is just a simple type
837    check on the argument.  */
838 
839 #define elf_cris_hash_entry(p) \
840  ((struct elf_cris_link_hash_entry *) (&(p)->root))
841 
842 /* Create an entry in a CRIS ELF linker hash table.  */
843 
844 static struct bfd_hash_entry *
elf_cris_link_hash_newfunc(struct bfd_hash_entry * entry,struct bfd_hash_table * table,const char * string)845 elf_cris_link_hash_newfunc (struct bfd_hash_entry *entry,
846 			    struct bfd_hash_table *table,
847 			    const char *string)
848 {
849   struct elf_cris_link_hash_entry *ret =
850     (struct elf_cris_link_hash_entry *) entry;
851 
852   /* Allocate the structure if it has not already been allocated by a
853      subclass.  */
854   if (ret == (struct elf_cris_link_hash_entry *) NULL)
855     ret = ((struct elf_cris_link_hash_entry *)
856 	   bfd_hash_allocate (table,
857 			      sizeof (struct elf_cris_link_hash_entry)));
858   if (ret == (struct elf_cris_link_hash_entry *) NULL)
859     return (struct bfd_hash_entry *) ret;
860 
861   /* Call the allocation method of the superclass.  */
862   ret = ((struct elf_cris_link_hash_entry *)
863 	 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
864 				     table, string));
865   if (ret != (struct elf_cris_link_hash_entry *) NULL)
866     {
867       ret->pcrel_relocs_copied = NULL;
868       ret->gotplt_refcount = 0;
869       ret->gotplt_offset = 0;
870       ret->dtp_refcount = 0;
871       ret->tprel_refcount = 0;
872       ret->reg_got_refcount = 0;
873     }
874 
875   return (struct bfd_hash_entry *) ret;
876 }
877 
878 /* Create a CRIS ELF linker hash table.  */
879 
880 static struct bfd_link_hash_table *
elf_cris_link_hash_table_create(bfd * abfd)881 elf_cris_link_hash_table_create (bfd *abfd)
882 {
883   struct elf_cris_link_hash_table *ret;
884   bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
885 
886   ret = ((struct elf_cris_link_hash_table *) bfd_zmalloc (amt));
887   if (ret == (struct elf_cris_link_hash_table *) NULL)
888     return NULL;
889 
890   if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
891 				      elf_cris_link_hash_newfunc,
892 				      sizeof (struct elf_cris_link_hash_entry),
893 				      CRIS_ELF_DATA))
894     {
895       free (ret);
896       return NULL;
897     }
898 
899   /* Initialize to skip over the first three entries in the gotplt; they
900      are used for run-time symbol evaluation.  */
901   ret->next_gotplt_entry = 12;
902 
903   return &ret->root.root;
904 }
905 
906 /* Perform a single relocation.  By default we use the standard BFD
907    routines, with a few tweaks.  */
908 
909 static bfd_reloc_status_type
cris_final_link_relocate(reloc_howto_type * howto,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * rel,bfd_vma relocation)910 cris_final_link_relocate (reloc_howto_type *  howto,
911 			  bfd *               input_bfd,
912 			  asection *          input_section,
913 			  bfd_byte *          contents,
914 			  Elf_Internal_Rela * rel,
915 			  bfd_vma             relocation)
916 {
917   bfd_reloc_status_type r;
918   enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
919 
920   /* PC-relative relocations are relative to the position *after*
921      the reloc.  Note that for R_CRIS_8_PCREL the adjustment is
922      not a single byte, since PC must be 16-bit-aligned.  */
923   switch (r_type)
924     {
925       /* Check that the 16-bit GOT relocs are positive.  */
926     case R_CRIS_16_GOTPLT:
927     case R_CRIS_16_GOT:
928       if ((bfd_signed_vma) relocation < 0)
929 	return bfd_reloc_overflow;
930       break;
931 
932     case R_CRIS_32_PLT_PCREL:
933     case R_CRIS_32_PCREL:
934       relocation -= 2;
935       /* Fall through.  */
936     case R_CRIS_8_PCREL:
937     case R_CRIS_16_PCREL:
938       relocation -= 2;
939       break;
940 
941     default:
942       break;
943     }
944 
945   r = _bfd_final_link_relocate (howto, input_bfd, input_section,
946 				contents, rel->r_offset,
947 				relocation, rel->r_addend);
948   return r;
949 }
950 
951 
952 /* The number of errors left before we stop outputting reloc-specific
953    explanatory messages.  By coincidence, this works nicely together
954    with the default number of messages you'll get from LD about
955    "relocation truncated to fit" messages before you get an
956    "additional relocation overflows omitted from the output".  */
957 static int additional_relocation_error_msg_count = 10;
958 
959 /* Relocate an CRIS ELF section.  See elf32-fr30.c, from where this was
960    copied, for further comments.  */
961 
962 static bfd_boolean
cris_elf_relocate_section(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * relocs,Elf_Internal_Sym * local_syms,asection ** local_sections)963 cris_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
964 			   struct bfd_link_info *info,
965 			   bfd *input_bfd,
966 			   asection *input_section,
967 			   bfd_byte *contents,
968 			   Elf_Internal_Rela *relocs,
969 			   Elf_Internal_Sym *local_syms,
970 			   asection **local_sections)
971 {
972   struct elf_cris_link_hash_table * htab;
973   bfd *dynobj;
974   Elf_Internal_Shdr *symtab_hdr;
975   struct elf_link_hash_entry **sym_hashes;
976   bfd_vma *local_got_offsets;
977   asection *sgot;
978   asection *splt;
979   asection *sreloc;
980   Elf_Internal_Rela *rel;
981   Elf_Internal_Rela *relend;
982   asection *srelgot;
983 
984   htab = elf_cris_hash_table (info);
985   if (htab == NULL)
986     return FALSE;
987 
988   dynobj = elf_hash_table (info)->dynobj;
989   local_got_offsets = elf_local_got_offsets (input_bfd);
990   symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
991   sym_hashes = elf_sym_hashes (input_bfd);
992   relend     = relocs + input_section->reloc_count;
993 
994   sgot = NULL;
995   splt = NULL;
996   sreloc = NULL;
997   srelgot = NULL;
998 
999   if (dynobj != NULL)
1000     {
1001       splt = bfd_get_linker_section (dynobj, ".plt");
1002       sgot = bfd_get_linker_section (dynobj, ".got");
1003     }
1004 
1005   for (rel = relocs; rel < relend; rel ++)
1006     {
1007       reloc_howto_type *howto;
1008       unsigned long r_symndx;
1009       Elf_Internal_Sym *sym;
1010       asection *sec;
1011       struct elf_link_hash_entry *h;
1012       bfd_vma relocation;
1013       bfd_reloc_status_type r;
1014       const char *symname = NULL;
1015       enum elf_cris_reloc_type r_type;
1016 
1017       r_type = ELF32_R_TYPE (rel->r_info);
1018 
1019       if (   r_type == R_CRIS_GNU_VTINHERIT
1020 	  || r_type == R_CRIS_GNU_VTENTRY)
1021 	continue;
1022 
1023       r_symndx = ELF32_R_SYM (rel->r_info);
1024       howto  = cris_elf_howto_table + r_type;
1025       h      = NULL;
1026       sym    = NULL;
1027       sec    = NULL;
1028 
1029       if (r_symndx < symtab_hdr->sh_info)
1030 	{
1031 	  sym = local_syms + r_symndx;
1032 	  sec = local_sections [r_symndx];
1033 	  relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1034 
1035 	  symname = (bfd_elf_string_from_elf_section
1036 		     (input_bfd, symtab_hdr->sh_link, sym->st_name));
1037 	  if (symname == NULL)
1038 	    symname = bfd_section_name (input_bfd, sec);
1039 	}
1040       else
1041 	{
1042 	  bfd_boolean warned, ignored;
1043 	  bfd_boolean unresolved_reloc;
1044 
1045 	  RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1046 				   r_symndx, symtab_hdr, sym_hashes,
1047 				   h, sec, relocation,
1048 				   unresolved_reloc, warned, ignored);
1049 
1050 	  symname = h->root.root.string;
1051 
1052 	  if (unresolved_reloc
1053 	      /* Perhaps we should detect the cases that
1054 		 sec->output_section is expected to be NULL like i386 and
1055 		 m68k, but apparently (and according to elfxx-ia64.c) all
1056 		 valid cases are where the symbol is defined in a shared
1057 		 object which we link dynamically against.  This includes
1058 		 PLT relocs for which we've created a PLT entry and other
1059 		 relocs for which we're prepared to create dynamic
1060 		 relocations.
1061 
1062 		 For now, new situations cause us to just err when
1063 		 sec->output_offset is NULL but the object with the symbol
1064 		 is *not* dynamically linked against.  Thus this will
1065 		 automatically remind us so we can see if there are other
1066 		 valid cases we need to revisit.  */
1067 	      && (sec->owner->flags & DYNAMIC) != 0)
1068 	    relocation = 0;
1069 
1070 	  else if (h->root.type == bfd_link_hash_defined
1071 		   || h->root.type == bfd_link_hash_defweak)
1072 	    {
1073 	      /* Here follow the cases where the relocation value must
1074 		 be zero (or when further handling is simplified when
1075 		 zero).  I can't claim to understand the various
1076 		 conditions and they weren't described in the files
1077 		 where I copied them from (elf32-m68k.c and
1078 		 elf32-i386.c), but let's mention examples of where
1079 		 they happen.  FIXME: Perhaps define and use a
1080 		 dynamic_symbol_p function like ia64.
1081 
1082 		 - When creating a shared library, we can have an
1083 		 ordinary relocation for a symbol defined in a shared
1084 		 library (perhaps the one we create).  We then make
1085 		 the relocation value zero, as the value seen now will
1086 		 be added into the relocation addend in this shared
1087 		 library, but must be handled only at dynamic-link
1088 		 time.  FIXME: Not sure this example covers the
1089 		 h->elf_link_hash_flags test, though it's there in
1090 		 other targets.  */
1091 	      if (info->shared
1092 		  && ((! info->symbolic && h->dynindx != -1)
1093 		      || !h->def_regular)
1094 		  && (input_section->flags & SEC_ALLOC) != 0
1095 		  && (r_type == R_CRIS_8
1096 		      || r_type == R_CRIS_16
1097 		      || r_type == R_CRIS_32
1098 		      || r_type == R_CRIS_8_PCREL
1099 		      || r_type == R_CRIS_16_PCREL
1100 		      || r_type == R_CRIS_32_PCREL))
1101 		relocation = 0;
1102 	      else if (!info->relocatable && unresolved_reloc
1103 		       && (_bfd_elf_section_offset (output_bfd, info,
1104 						    input_section,
1105 						    rel->r_offset)
1106 			   != (bfd_vma) -1))
1107 		{
1108 		  _bfd_error_handler
1109 		    (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1110 		     input_bfd,
1111 		     input_section,
1112 		     cris_elf_howto_table[r_type].name,
1113 		     symname);
1114 		  bfd_set_error (bfd_error_bad_value);
1115 		  return FALSE;
1116 		}
1117 	    }
1118 	}
1119 
1120       if (sec != NULL && discarded_section (sec))
1121 	RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1122 					 rel, 1, relend, howto, 0, contents);
1123 
1124       if (info->relocatable)
1125 	continue;
1126 
1127       switch (r_type)
1128 	{
1129 	case R_CRIS_16_GOTPLT:
1130 	case R_CRIS_32_GOTPLT:
1131 	  /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1132 	     but we require a PLT, and the PLT handling will take care of
1133 	     filling in the PLT-specific GOT entry.  For the GOT offset,
1134 	     calculate it as we do when filling it in for the .got.plt
1135 	     section.  If we don't have a PLT, punt to GOT handling.  */
1136 	  if (h != NULL
1137 	      && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1138 	    {
1139 	      asection *sgotplt
1140 		= bfd_get_linker_section (dynobj, ".got.plt");
1141 	      bfd_vma got_offset;
1142 
1143 	      BFD_ASSERT (h->dynindx != -1);
1144 	      BFD_ASSERT (sgotplt != NULL);
1145 
1146 	      got_offset
1147 		= ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1148 
1149 	      relocation = got_offset;
1150 	      break;
1151 	    }
1152 
1153 	  /* We didn't make a PLT entry for this symbol.  Maybe everything is
1154 	     folded into the GOT.  Other than folding, this happens when
1155 	     statically linking PIC code, or when using -Bsymbolic.  Check
1156 	     that we instead have a GOT entry as done for us by
1157 	     elf_cris_adjust_dynamic_symbol, and drop through into the
1158 	     ordinary GOT cases.  This must not happen for the
1159 	     executable, because any reference it does to a function
1160 	     that is satisfied by a DSO must generate a PLT.  We assume
1161 	     these call-specific relocs don't address non-functions.  */
1162 	  if (h != NULL
1163 	      && (h->got.offset == (bfd_vma) -1
1164 		  || (!info->shared
1165 		      && !(h->def_regular
1166 			   || (!h->def_dynamic
1167 			       && h->root.type == bfd_link_hash_undefweak)))))
1168 	    {
1169 	      (*_bfd_error_handler)
1170 		((h->got.offset == (bfd_vma) -1)
1171 		 ? _("%B, section %A: No PLT nor GOT for relocation %s"
1172 		     " against symbol `%s'")
1173 		 : _("%B, section %A: No PLT for relocation %s"
1174 		     " against symbol `%s'"),
1175 		 input_bfd,
1176 		 input_section,
1177 		 cris_elf_howto_table[r_type].name,
1178 		 (symname != NULL && symname[0] != '\0'
1179 		  ? symname : _("[whose name is lost]")));
1180 
1181 	      /* FIXME: Perhaps blaming input is not the right thing to
1182 		 do; this is probably an internal error.  But it is true
1183 		 that we didn't like that particular input.  */
1184 	      bfd_set_error (bfd_error_bad_value);
1185 	      return FALSE;
1186 	    }
1187 	  /* Fall through.  */
1188 
1189 	  /* The size of the actual relocation is not used here; we only
1190 	     fill in the GOT table here.  */
1191 	case R_CRIS_16_GOT:
1192 	case R_CRIS_32_GOT:
1193 	  {
1194 	    bfd_vma off;
1195 
1196 	    /* Note that despite using RELA relocations, the .got contents
1197 	       is always filled in with the link-relative relocation
1198 	       value; the addend.  */
1199 
1200 	    if (h != NULL)
1201 	      {
1202 		off = h->got.offset;
1203 		BFD_ASSERT (off != (bfd_vma) -1);
1204 
1205 		if (!elf_hash_table (info)->dynamic_sections_created
1206 		    || (! info->shared
1207 			&& (h->def_regular
1208 			    || h->type == STT_FUNC
1209 			    || h->needs_plt))
1210 		    || (info->shared
1211 			&& (info->symbolic || h->dynindx == -1)
1212 			&& h->def_regular))
1213 		  {
1214 		    /* This wasn't checked above for ! info->shared, but
1215 		       must hold there if we get here; the symbol must
1216 		       be defined in the regular program or be undefweak
1217 		       or be a function or otherwise need a PLT.  */
1218 		    BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1219 				|| info->shared
1220 				|| h->def_regular
1221 				|| h->type == STT_FUNC
1222 				|| h->needs_plt
1223 				|| h->root.type == bfd_link_hash_undefweak);
1224 
1225 		    /* This is actually a static link, or it is a
1226 		       -Bsymbolic link and the symbol is defined locally,
1227 		       or is undefweak, or the symbol was forced to be
1228 		       local because of a version file, or we're not
1229 		       creating a dynamic object.  We must initialize this
1230 		       entry in the global offset table.  Since the offset
1231 		       must always be a multiple of 4, we use the least
1232 		       significant bit to record whether we have
1233 		       initialized it already.
1234 
1235 		       If this GOT entry should be runtime-initialized, we
1236 		       will create a .rela.got relocation entry to
1237 		       initialize the value.  This is done in the
1238 		       finish_dynamic_symbol routine.  */
1239 		    if ((off & 1) != 0)
1240 		      off &= ~1;
1241 		    else
1242 		      {
1243 			bfd_put_32 (output_bfd, relocation,
1244 				    sgot->contents + off);
1245 			h->got.offset |= 1;
1246 		      }
1247 		  }
1248 	      }
1249 	    else
1250 	      {
1251 		BFD_ASSERT (local_got_offsets != NULL
1252 			    && local_got_offsets[r_symndx] != (bfd_vma) -1);
1253 
1254 		off = local_got_offsets[r_symndx];
1255 
1256 		/* The offset must always be a multiple of 4.  We use
1257 		   the least significant bit to record whether we have
1258 		   already generated the necessary reloc.  */
1259 		if ((off & 1) != 0)
1260 		  off &= ~1;
1261 		else
1262 		  {
1263 		    bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1264 
1265 		    if (info->shared)
1266 		      {
1267 			Elf_Internal_Rela outrel;
1268 			bfd_byte *loc;
1269 
1270 			if (srelgot == NULL)
1271 			  srelgot
1272 			    = bfd_get_linker_section (dynobj, ".rela.got");
1273 			BFD_ASSERT (srelgot != NULL);
1274 
1275 			outrel.r_offset = (sgot->output_section->vma
1276 					   + sgot->output_offset
1277 					   + off);
1278 			outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1279 			outrel.r_addend = relocation;
1280 			loc = srelgot->contents;
1281 			loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1282 			bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1283 		      }
1284 
1285 		    local_got_offsets[r_symndx] |= 1;
1286 		  }
1287 	      }
1288 
1289 	    relocation = sgot->output_offset + off;
1290 	    if (rel->r_addend != 0)
1291 	      {
1292 		/* We can't do anything for a relocation which is against
1293 		   a symbol *plus offset*.  GOT holds relocations for
1294 		   symbols.  Make this an error; the compiler isn't
1295 		   allowed to pass us these kinds of things.  */
1296 		if (h == NULL)
1297 		  (*_bfd_error_handler)
1298 		    (_("%B, section %A: relocation %s with non-zero addend %d"
1299 		       " against local symbol"),
1300 		     input_bfd,
1301 		     input_section,
1302 		     cris_elf_howto_table[r_type].name,
1303 		     rel->r_addend);
1304 		else
1305 		  (*_bfd_error_handler)
1306 		    (_("%B, section %A: relocation %s with non-zero addend %d"
1307 		       " against symbol `%s'"),
1308 		     input_bfd,
1309 		     input_section,
1310 		     cris_elf_howto_table[r_type].name,
1311 		     rel->r_addend,
1312 		     symname[0] != '\0' ? symname : _("[whose name is lost]"));
1313 
1314 		bfd_set_error (bfd_error_bad_value);
1315 		return FALSE;
1316 	      }
1317 	  }
1318 	  break;
1319 
1320 	case R_CRIS_32_GOTREL:
1321 	  /* This relocation must only be performed against local symbols.
1322 	     It's also ok when we link a program and the symbol is either
1323 	     defined in an ordinary (non-DSO) object or is undefined weak.  */
1324 	  if (h != NULL
1325 	      && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1326 	      && !(!info->shared
1327 		   && (h->def_regular
1328 		       || (!h->def_dynamic
1329 			   && h->root.type == bfd_link_hash_undefweak))))
1330 	    {
1331 	      (*_bfd_error_handler)
1332 		(_("%B, section %A: relocation %s is"
1333 		   " not allowed for global symbol: `%s'"),
1334 		 input_bfd,
1335 		 input_section,
1336 		 cris_elf_howto_table[r_type].name,
1337 		 symname);
1338 	      bfd_set_error (bfd_error_bad_value);
1339 	      return FALSE;
1340 	    }
1341 
1342 	  /* This can happen if we get a link error with the input ELF
1343 	     variant mismatching the output variant.  Emit an error so
1344 	     it's noticed if it happens elsewhere.  */
1345 	  if (sgot == NULL)
1346 	    {
1347 	      (*_bfd_error_handler)
1348 		(_("%B, section %A: relocation %s with no GOT created"),
1349 		 input_bfd,
1350 		 input_section,
1351 		 cris_elf_howto_table[r_type].name);
1352 	      bfd_set_error (bfd_error_bad_value);
1353 	      return FALSE;
1354 	    }
1355 
1356 	  /* This relocation is like a PC-relative one, except the
1357 	     reference point is the location of GOT.  Note that
1358 	     sgot->output_offset is not involved in this calculation.  We
1359 	     always want the start of entire .got section, not the
1360 	     position after the reserved header.  */
1361 	  relocation -= sgot->output_section->vma;
1362 	  break;
1363 
1364 	case R_CRIS_32_PLT_PCREL:
1365 	  /* Relocation is to the entry for this symbol in the
1366 	     procedure linkage table.  */
1367 
1368 	  /* Resolve a PLT_PCREL reloc against a local symbol directly,
1369 	     without using the procedure linkage table.  */
1370 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1371 	    break;
1372 
1373 	  if (h->plt.offset == (bfd_vma) -1
1374 	      || splt == NULL)
1375 	    {
1376 	      /* We didn't make a PLT entry for this symbol.  This
1377 		 happens when statically linking PIC code, or when
1378 		 using -Bsymbolic.  */
1379 	      break;
1380 	    }
1381 
1382 	  relocation = (splt->output_section->vma
1383 			+ splt->output_offset
1384 			+ h->plt.offset);
1385 	  break;
1386 
1387 	case R_CRIS_32_PLT_GOTREL:
1388 	  /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1389 	     start of the .got section.  See also comment at
1390 	     R_CRIS_32_GOT.  */
1391 	  relocation -= sgot->output_section->vma;
1392 
1393 	  /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1394 	     without using the procedure linkage table.  */
1395 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1396 	    break;
1397 
1398 	  if (h->plt.offset == (bfd_vma) -1
1399 	      || splt == NULL)
1400 	    {
1401 	      /* We didn't make a PLT entry for this symbol.  This
1402 		 happens when statically linking PIC code, or when
1403 		 using -Bsymbolic.  */
1404 	      break;
1405 	    }
1406 
1407 	  relocation = (splt->output_section->vma
1408 			+ splt->output_offset
1409 			+ h->plt.offset
1410 			- sgot->output_section->vma);
1411 	  break;
1412 
1413 	case R_CRIS_8_PCREL:
1414 	case R_CRIS_16_PCREL:
1415 	case R_CRIS_32_PCREL:
1416 	  /* If the symbol was local, we need no shlib-specific handling.  */
1417 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1418 	      || h->dynindx == -1)
1419 	    break;
1420 
1421 	  /* Fall through.  */
1422 	case R_CRIS_8:
1423 	case R_CRIS_16:
1424 	case R_CRIS_32:
1425 	  if (info->shared
1426 	      && r_symndx != STN_UNDEF
1427 	      && (input_section->flags & SEC_ALLOC) != 0
1428 	      && ((r_type != R_CRIS_8_PCREL
1429 		   && r_type != R_CRIS_16_PCREL
1430 		   && r_type != R_CRIS_32_PCREL)
1431 		  || (!info->symbolic
1432 		      || (h != NULL && !h->def_regular))))
1433 	    {
1434 	      Elf_Internal_Rela outrel;
1435 	      bfd_byte *loc;
1436 	      bfd_boolean skip, relocate;
1437 
1438 	      /* When generating a shared object, these relocations
1439 		 are copied into the output file to be resolved at run
1440 		 time.  */
1441 
1442 	      if (sreloc == NULL)
1443 		{
1444 		  sreloc = _bfd_elf_get_dynamic_reloc_section
1445 		    (dynobj, input_section, /*rela?*/ TRUE);
1446 		  /* The section should have been created in cris_elf_check_relocs,
1447 		     but that function will not be called for objects which fail in
1448 		     cris_elf_merge_private_bfd_data.  */
1449 		  if (sreloc == NULL)
1450 		    {
1451 		      bfd_set_error (bfd_error_bad_value);
1452 		      return FALSE;
1453 		    }
1454 		}
1455 
1456 	      skip = FALSE;
1457 	      relocate = FALSE;
1458 
1459 	      outrel.r_offset =
1460 		_bfd_elf_section_offset (output_bfd, info, input_section,
1461 					 rel->r_offset);
1462 	      if (outrel.r_offset == (bfd_vma) -1)
1463 		skip = TRUE;
1464 	      else if (outrel.r_offset == (bfd_vma) -2
1465 		       /* For now, undefined weak symbols with non-default
1466 			  visibility (yielding 0), like exception info for
1467 			  discarded sections, will get a R_CRIS_NONE
1468 			  relocation rather than no relocation, because we
1469 			  notice too late that the symbol doesn't need a
1470 			  relocation.  */
1471 		       || (h != NULL
1472 			   && h->root.type == bfd_link_hash_undefweak
1473 			   && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))
1474 		skip = TRUE, relocate = TRUE;
1475 	      outrel.r_offset += (input_section->output_section->vma
1476 				  + input_section->output_offset);
1477 
1478 	      if (skip)
1479 		memset (&outrel, 0, sizeof outrel);
1480 	      /* h->dynindx may be -1 if the symbol was marked to
1481 		 become local.  */
1482 	      else if (h != NULL
1483 		       && ((! info->symbolic && h->dynindx != -1)
1484 			   || !h->def_regular))
1485 		{
1486 		  BFD_ASSERT (h->dynindx != -1);
1487 		  outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1488 		  outrel.r_addend = relocation + rel->r_addend;
1489 		}
1490 	      else
1491 		{
1492 		  outrel.r_addend = relocation + rel->r_addend;
1493 
1494 		  if (r_type == R_CRIS_32)
1495 		    {
1496 		      relocate = TRUE;
1497 		      outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1498 		    }
1499 		  else
1500 		    {
1501 		      long indx;
1502 
1503 		      if (bfd_is_abs_section (sec))
1504 			indx = 0;
1505 		      else if (sec == NULL || sec->owner == NULL)
1506 			{
1507 			  bfd_set_error (bfd_error_bad_value);
1508 			  return FALSE;
1509 			}
1510 		      else
1511 			{
1512 			  asection *osec;
1513 
1514 			  /* We are turning this relocation into one
1515 			     against a section symbol.  It would be
1516 			     proper to subtract the symbol's value,
1517 			     osec->vma, from the emitted reloc addend,
1518 			     but ld.so expects buggy relocs.  */
1519 			  osec = sec->output_section;
1520 			  indx = elf_section_data (osec)->dynindx;
1521 			  if (indx == 0)
1522 			    {
1523 			      osec = htab->root.text_index_section;
1524 			      indx = elf_section_data (osec)->dynindx;
1525 			    }
1526 			  BFD_ASSERT (indx != 0);
1527 			}
1528 
1529 		      outrel.r_info = ELF32_R_INFO (indx, r_type);
1530 		    }
1531 		}
1532 
1533 	      loc = sreloc->contents;
1534 	      loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1535 	      bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1536 
1537 	      /* This reloc will be computed at runtime, so there's no
1538                  need to do anything now, except for R_CRIS_32 relocations
1539                  that have been turned into R_CRIS_RELATIVE.  */
1540 	      if (!relocate)
1541 		continue;
1542 	    }
1543 
1544 	  break;
1545 
1546 	case R_CRIS_16_DTPREL:
1547 	case R_CRIS_32_DTPREL:
1548 	  /* This relocation must only be performed against local
1549 	     symbols, or to sections that are not loadable.  It's also
1550 	     ok when we link a program and the symbol is defined in an
1551 	     ordinary (non-DSO) object (if it's undefined there, we've
1552 	     already seen an error).  */
1553 	  if (h != NULL
1554 	      && (input_section->flags & SEC_ALLOC) != 0
1555 	      && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1556 	      && (info->shared
1557 		  || (!h->def_regular
1558 		      && h->root.type != bfd_link_hash_undefined)))
1559 	    {
1560 	      (*_bfd_error_handler)
1561 		((h->root.type == bfd_link_hash_undefined)
1562 		 /* We shouldn't get here for GCC-emitted code.  */
1563 		 ? _("%B, section %A: relocation %s has an undefined"
1564 		     " reference to `%s', perhaps a declaration mixup?")
1565 		 : ("%B, section %A: relocation %s is"
1566 		     " not allowed for `%s', a global symbol with default"
1567 		     " visibility, perhaps a declaration mixup?"),
1568 		 input_bfd,
1569 		 input_section,
1570 		 cris_elf_howto_table[r_type].name,
1571 		 symname != NULL && symname[0] != '\0'
1572 		 ? symname : _("[whose name is lost]"));
1573 	      bfd_set_error (bfd_error_bad_value);
1574 	      return FALSE;
1575 	    }
1576 
1577 	  BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0
1578 		      || htab->dtpmod_refcount != 0);
1579 
1580 	  /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
1581 	     already done so.  Note that we do this in .got.plt, not
1582 	     in .got, as .got.plt contains the first part, still the
1583 	     reloc is against .got, because the linker script directs
1584 	     (is required to direct) them both into .got.  */
1585 	  if (htab->dtpmod_refcount > 0
1586 	      && (input_section->flags & SEC_ALLOC) != 0)
1587 	    {
1588 	      asection *sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
1589 	      BFD_ASSERT (sgotplt != NULL);
1590 
1591 	      if (info->shared)
1592 		{
1593 		  Elf_Internal_Rela outrel;
1594 		  bfd_byte *loc;
1595 
1596 		  if (srelgot == NULL)
1597 		    srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1598 		  BFD_ASSERT (srelgot != NULL);
1599 		  loc = srelgot->contents;
1600 		  loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1601 
1602 		  bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12);
1603 		  bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1604 		  outrel.r_offset = (sgotplt->output_section->vma
1605 				     + sgotplt->output_offset
1606 				     + 12);
1607 		  outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD);
1608 		  outrel.r_addend = 0;
1609 		  bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1610 		}
1611 	      else
1612 		{
1613 		  /* For an executable, the GOT entry contents is known.  */
1614 		  bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12);
1615 		  bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1616 		}
1617 
1618 	      /* Reverse the sign to mark that we've emitted the
1619 		 required GOT entry.  */
1620 	      htab->dtpmod_refcount = - htab->dtpmod_refcount;
1621 	    }
1622 
1623 	  /* The relocation is the offset from the start of the module
1624 	     TLS block to the (local) symbol.  */
1625 	  relocation -= elf_hash_table (info)->tls_sec == NULL
1626 	    ? 0 : elf_hash_table (info)->tls_sec->vma;
1627 	  break;
1628 
1629 	case R_CRIS_32_GD:
1630 	  if (info->shared)
1631 	    {
1632 	      bfd_set_error (bfd_error_invalid_operation);
1633 
1634 	      /* We've already informed in cris_elf_check_relocs that
1635 		 this is an error.  */
1636 	      return FALSE;
1637 	    }
1638 	  /* Fall through.  */
1639 
1640 	case R_CRIS_16_GOT_GD:
1641 	case R_CRIS_32_GOT_GD:
1642 	  if (rel->r_addend != 0)
1643 	    {
1644 	      /* We can't do anything for a relocation which is against a
1645 		 symbol *plus offset*.  The GOT holds relocations for
1646 		 symbols.  Make this an error; the compiler isn't allowed
1647 		 to pass us these kinds of things.  */
1648 	      (*_bfd_error_handler)
1649 		(_("%B, section %A: relocation %s with non-zero addend %d"
1650 		   " against symbol `%s'"),
1651 		 input_bfd,
1652 		 input_section,
1653 		 cris_elf_howto_table[r_type].name,
1654 		 rel->r_addend,
1655 		 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1656 
1657 	      bfd_set_error (bfd_error_bad_value);
1658 	      return FALSE;
1659 	    }
1660 
1661 	  if (!info->shared
1662 	      && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1663 	    {
1664 	      /* Known contents of the GOT.  */
1665 	      bfd_vma off;
1666 
1667 	      /* The symbol is defined in the program, so just write
1668 		 (1, known_tpoffset) into the GOT.  */
1669 	      relocation -= elf_hash_table (info)->tls_sec->vma;
1670 
1671 	      if (h != NULL)
1672 		{
1673 		  off = elf_cris_hash_entry (h)->tprel_refcount > 0
1674 		    ? h->got.offset + 4 : h->got.offset;
1675 		}
1676 	      else
1677 		{
1678 		  off = local_got_offsets[r_symndx];
1679 		  if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1680 		    off += 4;
1681 		}
1682 
1683 	      /* We use bit 1 of the offset as a flag for GOT entry with
1684 		 the R_CRIS_DTP reloc, setting it when we've emitted the
1685 		 GOT entry and reloc.  Bit 0 is used for R_CRIS_32_TPREL
1686 		 relocs.  */
1687 	      if ((off & 2) == 0)
1688 		{
1689 		  off &= ~3;
1690 
1691 		  if (h != NULL)
1692 		    h->got.offset |= 2;
1693 		  else
1694 		    local_got_offsets[r_symndx] |= 2;
1695 
1696 		  bfd_put_32 (output_bfd, 1, sgot->contents + off);
1697 		  bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4);
1698 		}
1699 	      else
1700 		off &= ~3;
1701 
1702 	      relocation = sgot->output_offset + off
1703 		+ (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1704 	    }
1705 	  else
1706 	    {
1707 	      /* Not all parts of the GOT entry are known; emit a real
1708 		 relocation.  */
1709 	      bfd_vma off;
1710 
1711 	      if (h != NULL)
1712 		off = elf_cris_hash_entry (h)->tprel_refcount > 0
1713 		  ? h->got.offset + 4 : h->got.offset;
1714 	      else
1715 		{
1716 		  off = local_got_offsets[r_symndx];
1717 		  if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1718 		    off += 4;
1719 		}
1720 
1721 	      /* See above re bit 1 and bit 0 usage.  */
1722 	      if ((off & 2) == 0)
1723 		{
1724 		  Elf_Internal_Rela outrel;
1725 		  bfd_byte *loc;
1726 
1727 		  off &= ~3;
1728 
1729 		  if (h != NULL)
1730 		    h->got.offset |= 2;
1731 		  else
1732 		    local_got_offsets[r_symndx] |= 2;
1733 
1734 		  /* Clear the target contents of the GOT (just as a
1735 		     gesture; it's already cleared on allocation): this
1736 		     relocation is not like the other dynrelocs.  */
1737 		  bfd_put_32 (output_bfd, 0, sgot->contents + off);
1738 		  bfd_put_32 (output_bfd, 0, sgot->contents + off + 4);
1739 
1740 		  if (srelgot == NULL)
1741 		    srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1742 		  BFD_ASSERT (srelgot != NULL);
1743 
1744 		  if (h != NULL && h->dynindx != -1)
1745 		    {
1746 		      outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP);
1747 		      relocation = 0;
1748 		    }
1749 		  else
1750 		    {
1751 		      outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP);
1752 
1753 		      /* NULL if we had an error.  */
1754 		      relocation -= elf_hash_table (info)->tls_sec == NULL
1755 			? 0 : elf_hash_table (info)->tls_sec->vma;
1756 		    }
1757 
1758 		  outrel.r_offset = (sgot->output_section->vma
1759 				     + sgot->output_offset
1760 				     + off);
1761 		  outrel.r_addend = relocation;
1762 		  loc = srelgot->contents;
1763 		  loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1764 
1765 		  /* NULL if we had an error.  */
1766 		  if (srelgot->contents != NULL)
1767 		    bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1768 		}
1769 	      else
1770 		off &= ~3;
1771 
1772 	      relocation = sgot->output_offset + off
1773 		+ (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1774 	    }
1775 
1776 	  /* The GOT-relative offset to the GOT entry is the
1777 	     relocation, or for R_CRIS_32_GD, the actual address of
1778 	     the GOT entry.  */
1779 	  break;
1780 
1781 	case R_CRIS_32_IE:
1782 	  if (info->shared)
1783 	    {
1784 	      bfd_set_error (bfd_error_invalid_operation);
1785 
1786 	      /* We've already informed in cris_elf_check_relocs that
1787 		 this is an error.  */
1788 	      return FALSE;
1789 	    }
1790 	  /* Fall through.  */
1791 
1792 	case R_CRIS_32_GOT_TPREL:
1793 	case R_CRIS_16_GOT_TPREL:
1794 	  if (rel->r_addend != 0)
1795 	    {
1796 	      /* We can't do anything for a relocation which is
1797 		 against a symbol *plus offset*.  GOT holds
1798 		 relocations for symbols.  Make this an error; the
1799 		 compiler isn't allowed to pass us these kinds of
1800 		 things.  */
1801 	      (*_bfd_error_handler)
1802 		(_("%B, section %A: relocation %s with non-zero addend %d"
1803 		   " against symbol `%s'"),
1804 		 input_bfd,
1805 		 input_section,
1806 		 cris_elf_howto_table[r_type].name,
1807 		 rel->r_addend,
1808 		 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1809 	      bfd_set_error (bfd_error_bad_value);
1810 	      return FALSE;
1811 	    }
1812 
1813 	  if (!info->shared
1814 	      && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1815 	    {
1816 	      /* Known contents of the GOT.  */
1817 	      bfd_vma off;
1818 
1819 	      /* The symbol is defined in the program, so just write
1820 		 the -prog_tls_size+known_tpoffset into the GOT.  */
1821 	      relocation -= elf_hash_table (info)->tls_sec->vma;
1822 	      relocation -= elf_hash_table (info)->tls_size;
1823 
1824 	      if (h != NULL)
1825 		off = h->got.offset;
1826 	      else
1827 		off = local_got_offsets[r_symndx];
1828 
1829 	      /* Bit 0 is used to mark whether we've emitted the required
1830 		 entry (and if needed R_CRIS_32_TPREL reloc).  Bit 1
1831 		 is used similarly for R_CRIS_DTP, see above.  */
1832 	      if ((off & 1) == 0)
1833 		{
1834 		  off &= ~3;
1835 
1836 		  if (h != NULL)
1837 		    h->got.offset |= 1;
1838 		  else
1839 		    local_got_offsets[r_symndx] |= 1;
1840 
1841 		  bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1842 		}
1843 	      else
1844 		off &= ~3;
1845 
1846 	      relocation = sgot->output_offset + off
1847 		+ (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1848 	    }
1849 	  else
1850 	    {
1851 	      /* Emit a real relocation.  */
1852 	      bfd_vma off;
1853 
1854 	      if (h != NULL)
1855 		off = h->got.offset;
1856 	      else
1857 		off = local_got_offsets[r_symndx];
1858 
1859 	      /* See above re usage of bit 0 and 1.  */
1860 	      if ((off & 1) == 0)
1861 		{
1862 		  Elf_Internal_Rela outrel;
1863 		  bfd_byte *loc;
1864 
1865 		  off &= ~3;
1866 
1867 		  if (h != NULL)
1868 		    h->got.offset |= 1;
1869 		  else
1870 		    local_got_offsets[r_symndx] |= 1;
1871 
1872 		  if (srelgot == NULL)
1873 		    srelgot = bfd_get_linker_section (dynobj, ".rela.got");
1874 		  BFD_ASSERT (srelgot != NULL);
1875 
1876 		  if (h != NULL && h->dynindx != -1)
1877 		    {
1878 		      outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL);
1879 		      relocation = 0;
1880 		    }
1881 		  else
1882 		    {
1883 		      outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL);
1884 
1885 		      /* NULL if we had an error.  */
1886 		      relocation -= elf_hash_table (info)->tls_sec == NULL
1887 			? 0 : elf_hash_table (info)->tls_sec->vma;
1888 		    }
1889 
1890 		  /* Just "define" the initial contents in some
1891 		     semi-logical way.  */
1892 		  bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1893 
1894 		  outrel.r_offset = (sgot->output_section->vma
1895 				     + sgot->output_offset
1896 				     + off);
1897 		  outrel.r_addend = relocation;
1898 		  loc = srelgot->contents;
1899 		  loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1900 		  /* NULL if we had an error.  */
1901 		  if (srelgot->contents != NULL)
1902 		    bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1903 		}
1904 	      else
1905 		off &= ~3;
1906 
1907 	      relocation = sgot->output_offset + off
1908 		+ (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1909 	    }
1910 
1911 	  /* The GOT-relative offset to the GOT entry is the relocation,
1912 	     or for R_CRIS_32_GD, the actual address of the GOT entry.  */
1913 	  break;
1914 
1915 	case R_CRIS_16_TPREL:
1916 	case R_CRIS_32_TPREL:
1917 	  /* This relocation must only be performed against symbols
1918 	     defined in an ordinary (non-DSO) object.  */
1919 	  if (info->shared)
1920 	    {
1921 	      bfd_set_error (bfd_error_invalid_operation);
1922 
1923 	      /* We've already informed in cris_elf_check_relocs that
1924 		 this is an error.  */
1925 	      return FALSE;
1926 	    }
1927 
1928 	  if (h != NULL
1929 	      && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1930 	      && !(h->def_regular || ELF_COMMON_DEF_P (h))
1931 	      /* If it's undefined, then an error message has already
1932 		 been emitted.  */
1933 	      && h->root.type != bfd_link_hash_undefined)
1934 	    {
1935 	      (*_bfd_error_handler)
1936 		(_("%B, section %A: relocation %s is"
1937 		   " not allowed for symbol: `%s'"
1938 		   " which is defined outside the program,"
1939 		   " perhaps a declaration mixup?"),
1940 		 input_bfd,
1941 		 input_section,
1942 		 cris_elf_howto_table[r_type].name,
1943 		 symname);
1944 	      bfd_set_error (bfd_error_bad_value);
1945 	      return FALSE;
1946 	    }
1947 
1948 	  /* NULL if we had an error.  */
1949 	  relocation -= elf_hash_table (info)->tls_sec == NULL
1950 	    ? 0
1951 	    : (elf_hash_table (info)->tls_sec->vma
1952 	       + elf_hash_table (info)->tls_size);
1953 
1954 	  /* The TLS-relative offset is the relocation.  */
1955 	  break;
1956 
1957 	default:
1958 	  BFD_FAIL ();
1959 	  return FALSE;
1960 	}
1961 
1962       r = cris_final_link_relocate (howto, input_bfd, input_section,
1963 				     contents, rel, relocation);
1964 
1965       if (r != bfd_reloc_ok)
1966 	{
1967 	  const char * msg = (const char *) NULL;
1968 
1969 	  switch (r)
1970 	    {
1971 	    case bfd_reloc_overflow:
1972 	      r = info->callbacks->reloc_overflow
1973 		(info, (h ? &h->root : NULL), symname, howto->name,
1974 		 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1975 	      if (additional_relocation_error_msg_count > 0)
1976 		{
1977 		  additional_relocation_error_msg_count--;
1978 		  switch (r_type)
1979 		    {
1980 		    case R_CRIS_16_GOTPLT:
1981 		    case R_CRIS_16_GOT:
1982 
1983 		      /* Not just TLS is involved here, so we make
1984 			 generation and message depend on -fPIC/-fpic
1985 			 only.  */
1986 		    case R_CRIS_16_GOT_TPREL:
1987 		    case R_CRIS_16_GOT_GD:
1988 		      (*_bfd_error_handler)
1989 			(_("(too many global variables for -fpic:"
1990 			   " recompile with -fPIC)"));
1991 		      break;
1992 
1993 		    case R_CRIS_16_TPREL:
1994 		    case R_CRIS_16_DTPREL:
1995 		      (*_bfd_error_handler)
1996 			(_("(thread-local data too big for -fpic or"
1997 			   " -msmall-tls: recompile with -fPIC or"
1998 			   " -mno-small-tls)"));
1999 		      break;
2000 
2001 		      /* No known cause for overflow for other relocs.  */
2002 		    default:
2003 		      break;
2004 		    }
2005 		}
2006 	      break;
2007 
2008 	    case bfd_reloc_undefined:
2009 	      r = info->callbacks->undefined_symbol
2010 		(info, symname, input_bfd, input_section, rel->r_offset,
2011 		 TRUE);
2012 	      break;
2013 
2014 	    case bfd_reloc_outofrange:
2015 	      msg = _("internal error: out of range error");
2016 	      break;
2017 
2018 	    case bfd_reloc_notsupported:
2019 	      msg = _("internal error: unsupported relocation error");
2020 	      break;
2021 
2022 	    case bfd_reloc_dangerous:
2023 	      msg = _("internal error: dangerous relocation");
2024 	      break;
2025 
2026 	    default:
2027 	      msg = _("internal error: unknown error");
2028 	      break;
2029 	    }
2030 
2031 	  if (msg)
2032 	    r = info->callbacks->warning
2033 	      (info, msg, symname, input_bfd, input_section, rel->r_offset);
2034 
2035 	  if (! r)
2036 	    return FALSE;
2037 	}
2038     }
2039 
2040   return TRUE;
2041 }
2042 
2043 /* Finish up dynamic symbol handling.  We set the contents of various
2044    dynamic sections here.  */
2045 
2046 static bfd_boolean
elf_cris_finish_dynamic_symbol(bfd * output_bfd,struct bfd_link_info * info,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)2047 elf_cris_finish_dynamic_symbol (bfd *output_bfd,
2048 				struct bfd_link_info *info,
2049 				struct elf_link_hash_entry *h,
2050 				Elf_Internal_Sym *sym)
2051 {
2052   struct elf_cris_link_hash_table * htab;
2053   bfd *dynobj;
2054 
2055   /* Where in the plt entry to put values.  */
2056   int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
2057 
2058   /* What offset to add to the distance to the first PLT entry for the
2059      value at plt_off3.   */
2060   int plt_off3_value_bias = 4;
2061 
2062   /* Where in the PLT entry the call-dynlink-stub is (happens to be same
2063      for PIC and non-PIC for v32 and pre-v32).  */
2064   int plt_stub_offset = 8;
2065   int plt_entry_size = PLT_ENTRY_SIZE;
2066   const bfd_byte *plt_entry = elf_cris_plt_entry;
2067   const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
2068 
2069   htab = elf_cris_hash_table (info);
2070   if (htab == NULL)
2071     return FALSE;
2072 
2073   /* Adjust the various PLT entry offsets.  */
2074   if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2075     {
2076       plt_off2 = 14;
2077       plt_off3 = 20;
2078       plt_off3_value_bias = -2;
2079       plt_stub_offset = 12;
2080       plt_entry_size = PLT_ENTRY_SIZE_V32;
2081       plt_entry = elf_cris_plt_entry_v32;
2082       plt_pic_entry = elf_cris_pic_plt_entry_v32;
2083     }
2084 
2085   dynobj = elf_hash_table (info)->dynobj;
2086 
2087   if (h->plt.offset != (bfd_vma) -1)
2088     {
2089       asection *splt;
2090       asection *sgotplt;
2091       asection *srela;
2092       bfd_vma got_base;
2093 
2094       bfd_vma gotplt_offset
2095 	= elf_cris_hash_entry (h)->gotplt_offset;
2096       Elf_Internal_Rela rela;
2097       bfd_byte *loc;
2098       bfd_boolean has_gotplt = gotplt_offset != 0;
2099 
2100       /* Get the index in the .rela.plt relocations for the .got.plt
2101 	 entry that corresponds to this symbol.
2102 	 We have to count backwards here, and the result is only valid
2103 	 as an index into .rela.plt.  We also have to undo the effect
2104 	 of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into
2105 	 .got.plt) for which gotplt_offset is adjusted, because while
2106 	 that entry goes into .got.plt, its relocation goes into
2107 	 .rela.got, not .rela.plt.  (It's not PLT-specific; not to be
2108 	 processed as part of the runtime lazy .rela.plt relocation).
2109 	 FIXME: There be literal constants here...  */
2110       bfd_vma rela_plt_index
2111 	= (htab->dtpmod_refcount != 0
2112 	   ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3);
2113 
2114       /* Get the offset into the .got table of the entry that corresponds
2115 	 to this function.  Note that we embed knowledge that "incoming"
2116 	 .got goes after .got.plt in the output without padding (pointer
2117 	 aligned).  However, that knowledge is present in several other
2118 	 places too.  */
2119       bfd_vma got_offset
2120 	= (has_gotplt
2121 	   ? gotplt_offset
2122 	   : h->got.offset + htab->next_gotplt_entry);
2123 
2124       /* This symbol has an entry in the procedure linkage table.  Set it
2125 	 up.  */
2126 
2127       BFD_ASSERT (h->dynindx != -1);
2128 
2129       splt = bfd_get_linker_section (dynobj, ".plt");
2130       sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
2131       srela = bfd_get_linker_section (dynobj, ".rela.plt");
2132       BFD_ASSERT (splt != NULL && sgotplt != NULL
2133 		  && (! has_gotplt || srela != NULL));
2134 
2135       got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2136 
2137       /* Fill in the entry in the procedure linkage table.  */
2138       if (! info->shared)
2139 	{
2140 	  memcpy (splt->contents + h->plt.offset, plt_entry,
2141 		  plt_entry_size);
2142 
2143 	  /* We need to enter the absolute address of the GOT entry here.  */
2144 	  bfd_put_32 (output_bfd, got_base + got_offset,
2145 		      splt->contents + h->plt.offset + plt_off1);
2146 	}
2147       else
2148 	{
2149 	  memcpy (splt->contents + h->plt.offset, plt_pic_entry,
2150 		  plt_entry_size);
2151 	  bfd_put_32 (output_bfd, got_offset,
2152 		      splt->contents + h->plt.offset + plt_off1);
2153 	}
2154 
2155       /* Fill in the plt entry and make a relocation, if this is a "real"
2156 	 PLT entry.  */
2157       if (has_gotplt)
2158 	{
2159 	  /* Fill in the offset to the reloc table.  */
2160 	  bfd_put_32 (output_bfd,
2161 		      rela_plt_index * sizeof (Elf32_External_Rela),
2162 		      splt->contents + h->plt.offset + plt_off2);
2163 
2164 	  /* Fill in the offset to the first PLT entry, where to "jump".  */
2165 	  bfd_put_32 (output_bfd,
2166 		      - (h->plt.offset + plt_off3 + plt_off3_value_bias),
2167 		      splt->contents + h->plt.offset + plt_off3);
2168 
2169 	  /* Fill in the entry in the global offset table with the address of
2170 	     the relocating stub.  */
2171 	  bfd_put_32 (output_bfd,
2172 		      (splt->output_section->vma
2173 		       + splt->output_offset
2174 		       + h->plt.offset
2175 		       + plt_stub_offset),
2176 		      sgotplt->contents + got_offset);
2177 
2178 	  /* Fill in the entry in the .rela.plt section.  */
2179 	  rela.r_offset = (sgotplt->output_section->vma
2180 			   + sgotplt->output_offset
2181 			   + got_offset);
2182 	  rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
2183 	  rela.r_addend = 0;
2184 	  loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela);
2185 	  bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2186 	}
2187 
2188       if (!h->def_regular)
2189 	{
2190 	  /* Mark the symbol as undefined, rather than as defined in
2191 	     the .plt section.  Leave the value alone.  */
2192 	  sym->st_shndx = SHN_UNDEF;
2193 
2194 	  /* FIXME: From elf32-sparc.c 2001-02-19 (1.18).  I still don't
2195 	     know whether resetting the value is significant; if it really
2196 	     is, rather than a quirk or bug in the sparc port, then I
2197 	     believe we'd see this elsewhere.  */
2198 	  /* If the symbol is weak, we do need to clear the value.
2199 	     Otherwise, the PLT entry would provide a definition for
2200 	     the symbol even if the symbol wasn't defined anywhere,
2201 	     and so the symbol would never be NULL.  */
2202 	  if (!h->ref_regular_nonweak)
2203 	    sym->st_value = 0;
2204 	}
2205     }
2206 
2207   /* For an ordinary program, we emit .got relocs only for symbols that
2208      are in the dynamic-symbols table and are either defined by the
2209      program or are undefined weak symbols, or are function symbols
2210      where we do not output a PLT: the PLT reloc was output above and all
2211      references to the function symbol are redirected to the PLT.  */
2212   if (h->got.offset != (bfd_vma) -1
2213       && (elf_cris_hash_entry (h)->reg_got_refcount > 0)
2214       && (info->shared
2215 	  || (h->dynindx != -1
2216 	      && h->plt.offset == (bfd_vma) -1
2217 	      && !h->def_regular
2218 	      && h->root.type != bfd_link_hash_undefweak)))
2219     {
2220       asection *sgot;
2221       asection *srela;
2222       Elf_Internal_Rela rela;
2223       bfd_byte *loc;
2224       bfd_byte *where;
2225 
2226       /* This symbol has an entry in the global offset table.  Set it up.  */
2227 
2228       sgot = bfd_get_linker_section (dynobj, ".got");
2229       srela = bfd_get_linker_section (dynobj, ".rela.got");
2230       BFD_ASSERT (sgot != NULL && srela != NULL);
2231 
2232       rela.r_offset = (sgot->output_section->vma
2233 		       + sgot->output_offset
2234 		       + (h->got.offset &~ (bfd_vma) 1));
2235 
2236       /* If this is a static link, or it is a -Bsymbolic link and the
2237 	 symbol is defined locally or was forced to be local because
2238 	 of a version file, we just want to emit a RELATIVE reloc.
2239 	 The entry in the global offset table will already have been
2240 	 initialized in the relocate_section function.  */
2241       where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
2242       if (! elf_hash_table (info)->dynamic_sections_created
2243 	  || (info->shared
2244 	      && (info->symbolic || h->dynindx == -1)
2245 	      && h->def_regular))
2246 	{
2247 	  rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
2248 	  rela.r_addend = bfd_get_signed_32 (output_bfd, where);
2249 	}
2250       else
2251 	{
2252 	  bfd_put_32 (output_bfd, (bfd_vma) 0, where);
2253 	  rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
2254 	  rela.r_addend = 0;
2255 	}
2256 
2257       loc = srela->contents;
2258       loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2259       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2260     }
2261 
2262   if (h->needs_copy)
2263     {
2264       asection *s;
2265       Elf_Internal_Rela rela;
2266       bfd_byte *loc;
2267 
2268       /* This symbol needs a copy reloc.  Set it up.  */
2269 
2270       BFD_ASSERT (h->dynindx != -1
2271 		  && (h->root.type == bfd_link_hash_defined
2272 		      || h->root.type == bfd_link_hash_defweak));
2273 
2274       s = bfd_get_linker_section (dynobj, ".rela.bss");
2275       BFD_ASSERT (s != NULL);
2276 
2277       rela.r_offset = (h->root.u.def.value
2278 		       + h->root.u.def.section->output_section->vma
2279 		       + h->root.u.def.section->output_offset);
2280       rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
2281       rela.r_addend = 0;
2282       loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2283       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2284     }
2285 
2286   /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  */
2287   if (h == elf_hash_table (info)->hdynamic
2288       || h == elf_hash_table (info)->hgot)
2289     sym->st_shndx = SHN_ABS;
2290 
2291   return TRUE;
2292 }
2293 
2294 /* Finish up the dynamic sections.  Do *not* emit relocs here, as their
2295    offsets were changed, as part of -z combreloc handling, from those we
2296    computed.  */
2297 
2298 static bfd_boolean
elf_cris_finish_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)2299 elf_cris_finish_dynamic_sections (bfd *output_bfd,
2300 				  struct bfd_link_info *info)
2301 {
2302   bfd *dynobj;
2303   asection *sgot;
2304   asection *sdyn;
2305 
2306   dynobj = elf_hash_table (info)->dynobj;
2307 
2308   sgot = bfd_get_linker_section (dynobj, ".got.plt");
2309   BFD_ASSERT (sgot != NULL);
2310   sdyn = bfd_get_linker_section (dynobj, ".dynamic");
2311 
2312   if (elf_hash_table (info)->dynamic_sections_created)
2313     {
2314       asection *splt;
2315       Elf32_External_Dyn *dyncon, *dynconend;
2316 
2317       splt = bfd_get_linker_section (dynobj, ".plt");
2318       BFD_ASSERT (splt != NULL && sdyn != NULL);
2319 
2320       dyncon = (Elf32_External_Dyn *) sdyn->contents;
2321       dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2322       for (; dyncon < dynconend; dyncon++)
2323 	{
2324 	  Elf_Internal_Dyn dyn;
2325 	  asection *s;
2326 
2327 	  bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2328 
2329 	  switch (dyn.d_tag)
2330 	    {
2331 	    default:
2332 	      break;
2333 
2334 	    case DT_PLTGOT:
2335 	      s = bfd_get_section_by_name (output_bfd, ".got");
2336 	      BFD_ASSERT (s != NULL);
2337 	      dyn.d_un.d_ptr = s->vma;
2338 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2339 	      break;
2340 
2341 	    case DT_JMPREL:
2342 	      /* Yes, we *can* have a .plt and no .plt.rela, for instance
2343 		 if all symbols are found in the .got (not .got.plt).  */
2344 	      s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2345 	      dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
2346 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2347 	      break;
2348 
2349 	    case DT_PLTRELSZ:
2350 	      s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2351 	      if (s == NULL)
2352 		dyn.d_un.d_val = 0;
2353 	      else
2354 		dyn.d_un.d_val = s->size;
2355 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2356 	      break;
2357 
2358 	    case DT_RELASZ:
2359 	      /* The procedure linkage table relocs (DT_JMPREL) should
2360 		 not be included in the overall relocs (DT_RELA).
2361 		 Therefore, we override the DT_RELASZ entry here to
2362 		 make it not include the JMPREL relocs.  Since the
2363 		 linker script arranges for .rela.plt to follow all
2364 		 other relocation sections, we don't have to worry
2365 		 about changing the DT_RELA entry.  */
2366 	      s = bfd_get_section_by_name (output_bfd, ".rela.plt");
2367 	      if (s != NULL)
2368 		dyn.d_un.d_val -= s->size;
2369 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2370 	      break;
2371 	    }
2372 	}
2373 
2374       /* Fill in the first entry in the procedure linkage table.  */
2375       if (splt->size > 0)
2376 	{
2377 	  if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2378 	    {
2379 	      if (info->shared)
2380 		memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
2381 			PLT_ENTRY_SIZE_V32);
2382 	      else
2383 		{
2384 		  memcpy (splt->contents, elf_cris_plt0_entry_v32,
2385 			  PLT_ENTRY_SIZE_V32);
2386 		  bfd_put_32 (output_bfd,
2387 			      sgot->output_section->vma
2388 			      + sgot->output_offset + 4,
2389 			      splt->contents + 4);
2390 
2391 		  elf_section_data (splt->output_section)->this_hdr.sh_entsize
2392 		    = PLT_ENTRY_SIZE_V32;
2393 		}
2394 	    }
2395 	  else
2396 	    {
2397 	      if (info->shared)
2398 		memcpy (splt->contents, elf_cris_pic_plt0_entry,
2399 			PLT_ENTRY_SIZE);
2400 	      else
2401 		{
2402 		  memcpy (splt->contents, elf_cris_plt0_entry,
2403 			  PLT_ENTRY_SIZE);
2404 		  bfd_put_32 (output_bfd,
2405 			      sgot->output_section->vma
2406 			      + sgot->output_offset + 4,
2407 			      splt->contents + 6);
2408 		  bfd_put_32 (output_bfd,
2409 			      sgot->output_section->vma
2410 			      + sgot->output_offset + 8,
2411 			      splt->contents + 14);
2412 
2413 		  elf_section_data (splt->output_section)->this_hdr.sh_entsize
2414 		    = PLT_ENTRY_SIZE;
2415 		}
2416             }
2417 	}
2418     }
2419 
2420   /* Fill in the first three entries in the global offset table.  */
2421   if (sgot->size > 0)
2422     {
2423       if (sdyn == NULL)
2424 	bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
2425       else
2426 	bfd_put_32 (output_bfd,
2427 		    sdyn->output_section->vma + sdyn->output_offset,
2428 		    sgot->contents);
2429       bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
2430       bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
2431     }
2432 
2433   elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
2434 
2435   return TRUE;
2436 }
2437 
2438 /* Return the section that should be marked against GC for a given
2439    relocation.  */
2440 
2441 static asection *
cris_elf_gc_mark_hook(asection * sec,struct bfd_link_info * info,Elf_Internal_Rela * rel,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)2442 cris_elf_gc_mark_hook (asection *sec,
2443 		       struct bfd_link_info *info,
2444 		       Elf_Internal_Rela *rel,
2445 		       struct elf_link_hash_entry *h,
2446 		       Elf_Internal_Sym *sym)
2447 {
2448   enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
2449   if (h != NULL)
2450     switch (r_type)
2451       {
2452       case R_CRIS_GNU_VTINHERIT:
2453       case R_CRIS_GNU_VTENTRY:
2454 	return NULL;
2455 
2456       default:
2457 	break;
2458       }
2459 
2460   return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
2461 }
2462 
2463 /* Update the got entry reference counts for the section being removed.  */
2464 
2465 static bfd_boolean
cris_elf_gc_sweep_hook(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)2466 cris_elf_gc_sweep_hook (bfd *abfd,
2467 			struct bfd_link_info *info,
2468 			asection *sec,
2469 			const Elf_Internal_Rela *relocs)
2470 {
2471   struct elf_cris_link_hash_table * htab;
2472   Elf_Internal_Shdr *symtab_hdr;
2473   struct elf_link_hash_entry **sym_hashes;
2474   bfd_signed_vma *local_got_refcounts;
2475   const Elf_Internal_Rela *rel, *relend;
2476   bfd *dynobj;
2477   asection *sgot;
2478   asection *srelgot;
2479 
2480   if (info->relocatable)
2481     return TRUE;
2482 
2483   dynobj = elf_hash_table (info)->dynobj;
2484   if (dynobj == NULL)
2485     return TRUE;
2486 
2487   htab = elf_cris_hash_table (info);
2488   if (htab == NULL)
2489     return FALSE;
2490 
2491   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2492   sym_hashes = elf_sym_hashes (abfd);
2493   local_got_refcounts = elf_local_got_refcounts (abfd);
2494 
2495   sgot = bfd_get_linker_section (dynobj, ".got");
2496   srelgot = bfd_get_linker_section (dynobj, ".rela.got");
2497 
2498   relend = relocs + sec->reloc_count;
2499   for (rel = relocs; rel < relend; rel++)
2500     {
2501       unsigned long r_symndx;
2502       struct elf_link_hash_entry *h = NULL;
2503       bfd_signed_vma got_element_size = 4;
2504       bfd_signed_vma *specific_refcount = NULL;
2505       enum elf_cris_reloc_type r_type;
2506 
2507       r_symndx = ELF32_R_SYM (rel->r_info);
2508       if (r_symndx >= symtab_hdr->sh_info)
2509 	{
2510 	  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2511 	  while (h->root.type == bfd_link_hash_indirect
2512 		 || h->root.type == bfd_link_hash_warning)
2513 	    h = (struct elf_link_hash_entry *) h->root.u.i.link;
2514 	}
2515 
2516       r_type = ELF32_R_TYPE (rel->r_info);
2517       switch (r_type)
2518 	{
2519 	case R_CRIS_32_GOT:
2520 	case R_CRIS_16_GOT:
2521 	case R_CRIS_16_GOTPLT:
2522 	case R_CRIS_32_GOTPLT:
2523 	  specific_refcount = h != NULL
2524 	    ? &((struct elf_cris_link_hash_entry *) h)->reg_got_refcount
2525 	    : &local_got_refcounts[LGOT_REG_NDX (r_symndx)];
2526 	  break;
2527 
2528 	case R_CRIS_32_GD:
2529 	case R_CRIS_32_GOT_GD:
2530 	case R_CRIS_16_GOT_GD:
2531 	  got_element_size = 8;
2532 	  specific_refcount = h != NULL
2533 	    ? &((struct elf_cris_link_hash_entry *) h)->dtp_refcount
2534 	    : &local_got_refcounts[LGOT_DTP_NDX (r_symndx)];
2535 	  break;
2536 
2537 	case R_CRIS_32_IE:
2538 	case R_CRIS_16_GOT_TPREL:
2539 	case R_CRIS_32_GOT_TPREL:
2540 	  specific_refcount = h != NULL
2541 	    ? &((struct elf_cris_link_hash_entry *) h)->tprel_refcount
2542 	    : &local_got_refcounts[LGOT_TPREL_NDX (r_symndx)];
2543 	  break;
2544 
2545 	default:
2546 	  break;
2547 	}
2548 
2549       switch (r_type)
2550 	{
2551 	case R_CRIS_32_IE:
2552 	case R_CRIS_32_GD:
2553 	case R_CRIS_16_GOT_TPREL:
2554 	case R_CRIS_32_GOT_TPREL:
2555 	case R_CRIS_32_GOT_GD:
2556 	case R_CRIS_16_GOT_GD:
2557 	case R_CRIS_16_GOT:
2558 	case R_CRIS_32_GOT:
2559 	  if (h != NULL)
2560 	    {
2561 	      /* If the counters are 0 when we got here, we've
2562 		 miscounted somehow somewhere, an internal error.  */
2563 	      BFD_ASSERT (h->got.refcount > 0);
2564 	      --h->got.refcount;
2565 
2566 	      BFD_ASSERT (*specific_refcount > 0);
2567 	      --*specific_refcount;
2568 	      if (*specific_refcount == 0)
2569 		{
2570 		  /* We don't need the .got entry any more.  */
2571 		  sgot->size -= got_element_size;
2572 		  srelgot->size -= sizeof (Elf32_External_Rela);
2573 		}
2574 	      break;
2575 	    }
2576 
2577 	local_got_reloc:
2578 	  if (local_got_refcounts != NULL)
2579 	    {
2580 	      /* If the counters are 0 when we got here, we've
2581 		 miscounted somehow somewhere, an internal error.  */
2582 	      BFD_ASSERT (local_got_refcounts[r_symndx] > 0);
2583 	      --local_got_refcounts[r_symndx];
2584 
2585 	      BFD_ASSERT (*specific_refcount > 0);
2586 	      --*specific_refcount;
2587 	      if (*specific_refcount == 0)
2588 		{
2589 		  /* We don't need the .got entry any more.  */
2590 		  sgot->size -= got_element_size;
2591 		  if (info->shared)
2592 		    srelgot->size -= sizeof (Elf32_External_Rela);
2593 		}
2594 	    }
2595 	  break;
2596 
2597 	case R_CRIS_16_GOTPLT:
2598 	case R_CRIS_32_GOTPLT:
2599 	  /* For local symbols, treat these like GOT relocs.  */
2600 	  if (h == NULL)
2601 	    goto local_got_reloc;
2602 	  else
2603 	    /* For global symbols, adjust the reloc-specific refcount.  */
2604 	    elf_cris_hash_entry (h)->gotplt_refcount--;
2605 	  /* Fall through.  */
2606 
2607 	case R_CRIS_32_PLT_GOTREL:
2608 	  /* FIXME: We don't garbage-collect away the .got section.  */
2609 	  if (local_got_refcounts != NULL)
2610 	    local_got_refcounts[-1]--;
2611 	  /* Fall through.  */
2612 
2613 	case R_CRIS_8:
2614 	case R_CRIS_16:
2615 	case R_CRIS_32:
2616 	case R_CRIS_8_PCREL:
2617 	case R_CRIS_16_PCREL:
2618 	case R_CRIS_32_PCREL:
2619 	case R_CRIS_32_PLT_PCREL:
2620 	  /* Negate the increment we did in cris_elf_check_relocs.  */
2621 	  if (h != NULL)
2622 	    {
2623 	      if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2624 		  && h->plt.refcount > 0)
2625 		--h->plt.refcount;
2626 	    }
2627 	  break;
2628 
2629 	case R_CRIS_32_DTPREL:
2630 	  /* This'd be a .dtpreld entry in e.g. debug info.  */
2631 	  if ((sec->flags & SEC_ALLOC) == 0)
2632 	    break;
2633 	  /* Fall through.  */
2634 	case R_CRIS_16_DTPREL:
2635 	  htab->dtpmod_refcount--;
2636 	  if (htab->dtpmod_refcount == 0)
2637 	    htab->next_gotplt_entry -= 8;
2638 	  BFD_ASSERT (local_got_refcounts != NULL);
2639 	  local_got_refcounts[-1]--;
2640 	  break;
2641 
2642 	default:
2643 	  break;
2644 	}
2645     }
2646 
2647   return TRUE;
2648 }
2649 
2650 /* The elf_backend_plt_sym_val hook function.  */
2651 
2652 static bfd_vma
cris_elf_plt_sym_val(bfd_vma i ATTRIBUTE_UNUSED,const asection * plt,const arelent * rel)2653 cris_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, const asection *plt,
2654 		      const arelent *rel)
2655 {
2656   bfd_size_type plt_entry_size;
2657   bfd_size_type pltoffs;
2658   bfd *abfd = plt->owner;
2659 
2660   /* Same for CRIS and CRIS v32; see elf_cris_(|pic_)plt_entry(|_v32)[].  */
2661   bfd_size_type plt_entry_got_offset = 2;
2662   bfd_size_type plt_sec_size;
2663   bfd_size_type got_vma_for_dyn;
2664   asection *got;
2665 
2666   /* FIXME: the .got section should be readily available also when
2667      we're not linking.  */
2668   if ((got = bfd_get_section_by_name (abfd, ".got")) == NULL)
2669     return (bfd_vma) -1;
2670 
2671   plt_sec_size =  bfd_section_size (plt->owner, plt);
2672   plt_entry_size
2673     = (bfd_get_mach (abfd) == bfd_mach_cris_v32
2674        ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2675 
2676   /* Data in PLT is GOT-relative for DYN, but absolute for EXE.  */
2677   got_vma_for_dyn = (abfd->flags & EXEC_P) ? 0 : got->vma;
2678 
2679   /* Because we can have merged GOT entries; a single .got entry for
2680      both GOT and the PLT part of the GOT (.got.plt), the index of the
2681      reloc in .rela.plt is not the same as the index in the PLT.
2682      Instead, we have to hunt down the GOT offset in the PLT that
2683      corresponds to that of this reloc.  Unfortunately, we will only
2684      be called for the .rela.plt relocs, so we'll miss synthetic
2685      symbols for .plt entries with merged GOT entries.  (FIXME:
2686      fixable by providing our own bfd_elf32_get_synthetic_symtab.
2687      Doesn't seem worthwile at time of this writing.)  FIXME: we've
2688      gone from O(1) to O(N) (N number of PLT entries) for finding each
2689      PLT address.  Shouldn't matter in practice though.  */
2690 
2691   for (pltoffs = plt_entry_size;
2692        pltoffs < plt_sec_size;
2693        pltoffs += plt_entry_size)
2694     {
2695       bfd_size_type got_offset;
2696       bfd_byte gotoffs_raw[4];
2697 
2698       if (!bfd_get_section_contents (abfd, (asection *) plt, gotoffs_raw,
2699 				     pltoffs + plt_entry_got_offset,
2700 				     sizeof (gotoffs_raw)))
2701 	return (bfd_vma) -1;
2702 
2703       got_offset = bfd_get_32 (abfd, gotoffs_raw);
2704       if (got_offset + got_vma_for_dyn == rel->address)
2705 	return plt->vma + pltoffs;
2706     }
2707 
2708   /* While it's tempting to BFD_ASSERT that we shouldn't get here,
2709      that'd not be graceful behavior for invalid input.  */
2710   return (bfd_vma) -1;
2711 }
2712 
2713 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2714    entry but we found we will not create any.  Called when we find we will
2715    not have any PLT for this symbol, by for example
2716    elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2717    or elf_cris_size_dynamic_sections if no dynamic sections will be
2718    created (we're only linking static objects).  */
2719 
2720 static bfd_boolean
elf_cris_adjust_gotplt_to_got(struct elf_cris_link_hash_entry * h,void * p)2721 elf_cris_adjust_gotplt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2722 {
2723   struct bfd_link_info *info = (struct bfd_link_info *) p;
2724 
2725   /* A GOTPLT reloc, when activated, is supposed to be included into
2726      the PLT refcount.  */
2727   BFD_ASSERT (h->gotplt_refcount == 0
2728 	      || h->gotplt_refcount <= h->root.plt.refcount);
2729 
2730   /* If nobody wanted a GOTPLT with this symbol, we're done.  */
2731   if (h->gotplt_refcount <= 0)
2732     return TRUE;
2733 
2734   if (h->reg_got_refcount > 0)
2735     {
2736       /* There's a GOT entry for this symbol.  Just adjust the refcounts.
2737 	 Probably not necessary at this stage, but keeping them accurate
2738 	 helps avoiding surprises later.  */
2739       h->root.got.refcount += h->gotplt_refcount;
2740       h->reg_got_refcount += h->gotplt_refcount;
2741       h->gotplt_refcount = 0;
2742     }
2743   else
2744     {
2745       /* No GOT entry for this symbol.  We need to create one.  */
2746       bfd *dynobj = elf_hash_table (info)->dynobj;
2747       asection *sgot;
2748       asection *srelgot;
2749 
2750       BFD_ASSERT (dynobj != NULL);
2751       sgot = bfd_get_linker_section (dynobj, ".got");
2752       srelgot = bfd_get_linker_section (dynobj, ".rela.got");
2753 
2754       /* Put accurate refcounts there.  */
2755       h->root.got.refcount += h->gotplt_refcount;
2756       h->reg_got_refcount = h->gotplt_refcount;
2757 
2758       h->gotplt_refcount = 0;
2759 
2760       /* We always have a .got and a .rela.got section if there were
2761 	 GOTPLT relocs in input.  */
2762       BFD_ASSERT (sgot != NULL && srelgot != NULL);
2763 
2764       /* Allocate space in the .got section.  */
2765       sgot->size += 4;
2766 
2767       /* Allocate relocation space.  */
2768       srelgot->size += sizeof (Elf32_External_Rela);
2769     }
2770 
2771   return TRUE;
2772 }
2773 
2774 /* Try to fold PLT entries with GOT entries.  There are two cases when we
2775    want to do this:
2776 
2777    - When all PLT references are GOTPLT references, and there are GOT
2778      references, and this is not the executable.  We don't have to
2779      generate a PLT at all.
2780 
2781    - When there are both (ordinary) PLT references and GOT references,
2782      and this isn't the executable.
2783      We want to make the PLT reference use the ordinary GOT entry rather
2784      than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2785      since the GOT entry will have to be resolved at startup anyway.
2786 
2787    Though the latter case is handled when room for the PLT is allocated,
2788    not here.
2789 
2790    By folding into the GOT, we may need a round-trip to a PLT in the
2791    executable for calls, a loss in performance.  Still, losing a
2792    reloc is a win in size and at least in start-up time.
2793 
2794    Note that this function is called before symbols are forced local by
2795    version scripts.  The differing cases are handled by
2796    elf_cris_hide_symbol.  */
2797 
2798 static bfd_boolean
elf_cris_try_fold_plt_to_got(struct elf_cris_link_hash_entry * h,void * p)2799 elf_cris_try_fold_plt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2800 {
2801   struct bfd_link_info *info = (struct bfd_link_info *) p;
2802 
2803   /* If there are no GOT references for this symbol, we can't fold any
2804      other reference so there's nothing to do.  Likewise if there are no
2805      PLT references; GOTPLT references included.  */
2806   if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2807     return TRUE;
2808 
2809   /* GOTPLT relocs are supposed to be included into the PLT refcount.  */
2810   BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2811 
2812   if (h->gotplt_refcount == h->root.plt.refcount)
2813     {
2814       /* The only PLT references are GOTPLT references, and there are GOT
2815 	 references.  Convert PLT to GOT references.  */
2816       if (! elf_cris_adjust_gotplt_to_got (h, info))
2817 	return FALSE;
2818 
2819       /* Clear the PLT references, so no PLT will be created.  */
2820       h->root.plt.offset = (bfd_vma) -1;
2821     }
2822 
2823   return TRUE;
2824 }
2825 
2826 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2827    to use a GOT entry (and create one) rather than requiring a GOTPLT
2828    entry.  */
2829 
2830 static void
elf_cris_hide_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h,bfd_boolean force_local)2831 elf_cris_hide_symbol (struct bfd_link_info *info,
2832 		      struct elf_link_hash_entry *h,
2833 		      bfd_boolean force_local)
2834 {
2835   elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2836 
2837   _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2838 }
2839 
2840 /* Adjust a symbol defined by a dynamic object and referenced by a
2841    regular object.  The current definition is in some section of the
2842    dynamic object, but we're not including those sections.  We have to
2843    change the definition to something the rest of the link can
2844    understand.  */
2845 
2846 static bfd_boolean
elf_cris_adjust_dynamic_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h)2847 elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info,
2848 				struct elf_link_hash_entry *h)
2849 {
2850   struct elf_cris_link_hash_table * htab;
2851   bfd *dynobj;
2852   asection *s;
2853   bfd_size_type plt_entry_size;
2854 
2855   htab = elf_cris_hash_table (info);
2856   if (htab == NULL)
2857     return FALSE;
2858 
2859   dynobj = elf_hash_table (info)->dynobj;
2860 
2861   /* Make sure we know what is going on here.  */
2862   BFD_ASSERT (dynobj != NULL
2863 	      && (h->needs_plt
2864 		  || h->u.weakdef != NULL
2865 		  || (h->def_dynamic
2866 		      && h->ref_regular
2867 		      && !h->def_regular)));
2868 
2869   plt_entry_size
2870     = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2871        ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2872 
2873   /* If this is a function, put it in the procedure linkage table.  We
2874      will fill in the contents of the procedure linkage table later,
2875      when we know the address of the .got section.  */
2876   if (h->type == STT_FUNC
2877       || h->needs_plt)
2878     {
2879       /* If we link a program (not a DSO), we'll get rid of unnecessary
2880 	 PLT entries; we point to the actual symbols -- even for pic
2881 	 relocs, because a program built with -fpic should have the same
2882 	 result as one built without -fpic, specifically considering weak
2883 	 symbols.
2884 	 FIXME: m68k and i386 differ here, for unclear reasons.  */
2885       if (! info->shared
2886 	  && !h->def_dynamic)
2887 	{
2888 	  /* This case can occur if we saw a PLT reloc in an input file,
2889 	     but the symbol was not defined by a dynamic object.  In such
2890 	     a case, we don't actually need to build a procedure linkage
2891 	     table, and we can just do an absolute or PC reloc instead, or
2892 	     change a .got.plt index to a .got index for GOTPLT relocs.  */
2893 	  BFD_ASSERT (h->needs_plt);
2894 	  h->needs_plt = 0;
2895 	  h->plt.offset = (bfd_vma) -1;
2896 	  return
2897 	    elf_cris_adjust_gotplt_to_got ((struct
2898 					    elf_cris_link_hash_entry *) h,
2899 					   info);
2900 	}
2901 
2902       /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2903 	 where a pointer-equivalent symbol was unimportant (i.e. more
2904 	 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2905 	 of the PLT.  We can't for the executable, because the GOT
2906 	 entries will point to the PLT there (and be constant).  */
2907       if (info->shared
2908 	  && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2909 					    h, info))
2910 	return FALSE;
2911 
2912       /* GC or folding may have rendered this entry unused.  */
2913       if (h->plt.refcount <= 0)
2914 	{
2915 	  h->needs_plt = 0;
2916 	  h->plt.offset = (bfd_vma) -1;
2917 	  return TRUE;
2918 	}
2919 
2920       /* Make sure this symbol is output as a dynamic symbol.  */
2921       if (h->dynindx == -1)
2922 	{
2923 	  if (! bfd_elf_link_record_dynamic_symbol (info, h))
2924 	    return FALSE;
2925 	}
2926 
2927       s = bfd_get_linker_section (dynobj, ".plt");
2928       BFD_ASSERT (s != NULL);
2929 
2930       /* If this is the first .plt entry, make room for the special
2931 	 first entry.  */
2932       if (s->size == 0)
2933 	s->size += plt_entry_size;
2934 
2935       /* If this symbol is not defined in a regular file, and we are
2936 	 not generating a shared library, then set the symbol to this
2937 	 location in the .plt.  */
2938       if (!info->shared
2939 	  && !h->def_regular)
2940 	{
2941 	  h->root.u.def.section = s;
2942 	  h->root.u.def.value = s->size;
2943 	}
2944 
2945       /* If there's already a GOT entry, use that, not a .got.plt.  A
2946 	 GOT field still has a reference count when we get here; it's
2947 	 not yet changed to an offset.  We can't do this for an
2948 	 executable, because then the reloc associated with the PLT
2949 	 would get a non-PLT reloc pointing to the PLT.  FIXME: Move
2950 	 this to elf_cris_try_fold_plt_to_got.  */
2951       if (info->shared && h->got.refcount > 0)
2952 	{
2953 	  h->got.refcount += h->plt.refcount;
2954 
2955 	  /* Mark the PLT offset to use the GOT entry by setting the low
2956 	     bit in the plt offset; it is always a multiple of
2957 	     plt_entry_size (which is at least a multiple of 2).  */
2958 	  BFD_ASSERT ((s->size % plt_entry_size) == 0);
2959 
2960 	  /* Change the PLT refcount to an offset.  */
2961 	  h->plt.offset = s->size;
2962 
2963 	  /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2964 	     that the got entry should be used instead.  */
2965 	  BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2966 		       h)->gotplt_offset == 0);
2967 
2968 	  /* Make room for this entry.  */
2969 	  s->size += plt_entry_size;
2970 
2971 	  return TRUE;
2972 	}
2973 
2974       /* No GOT reference for this symbol; prepare for an ordinary PLT.  */
2975       h->plt.offset = s->size;
2976 
2977       /* Make room for this entry.  */
2978       s->size += plt_entry_size;
2979 
2980       /* We also need to make an entry in the .got.plt section, which
2981 	 will be placed in the .got section by the linker script.  */
2982       ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2983 	= htab->next_gotplt_entry;
2984       htab->next_gotplt_entry += 4;
2985 
2986       s = bfd_get_linker_section (dynobj, ".got.plt");
2987       BFD_ASSERT (s != NULL);
2988       s->size += 4;
2989 
2990       /* We also need to make an entry in the .rela.plt section.  */
2991 
2992       s = bfd_get_linker_section (dynobj, ".rela.plt");
2993       BFD_ASSERT (s != NULL);
2994       s->size += sizeof (Elf32_External_Rela);
2995 
2996       return TRUE;
2997     }
2998 
2999   /* Reinitialize the plt offset now that it is not used as a reference
3000      count any more.  */
3001   h->plt.offset = (bfd_vma) -1;
3002 
3003   /* If this is a weak symbol, and there is a real definition, the
3004      processor independent code will have arranged for us to see the
3005      real definition first, and we can just use the same value.  */
3006   if (h->u.weakdef != NULL)
3007     {
3008       BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
3009 		  || h->u.weakdef->root.type == bfd_link_hash_defweak);
3010       h->root.u.def.section = h->u.weakdef->root.u.def.section;
3011       h->root.u.def.value = h->u.weakdef->root.u.def.value;
3012       return TRUE;
3013     }
3014 
3015   /* This is a reference to a symbol defined by a dynamic object which
3016      is not a function.  */
3017 
3018   /* If we are creating a shared library, we must presume that the
3019      only references to the symbol are via the global offset table.
3020      For such cases we need not do anything here; the relocations will
3021      be handled correctly by relocate_section.  */
3022   if (info->shared)
3023     return TRUE;
3024 
3025   /* If there are no references to this symbol that do not use the
3026      GOT, we don't need to generate a copy reloc.  */
3027   if (!h->non_got_ref)
3028     return TRUE;
3029 
3030   /* We must allocate the symbol in our .dynbss section, which will
3031      become part of the .bss section of the executable.  There will be
3032      an entry for this symbol in the .dynsym section.  The dynamic
3033      object will contain position independent code, so all references
3034      from the dynamic object to this symbol will go through the global
3035      offset table.  The dynamic linker will use the .dynsym entry to
3036      determine the address it must put in the global offset table, so
3037      both the dynamic object and the regular object will refer to the
3038      same memory location for the variable.  */
3039 
3040   s = bfd_get_linker_section (dynobj, ".dynbss");
3041   BFD_ASSERT (s != NULL);
3042 
3043   /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
3044      copy the initial value out of the dynamic object and into the
3045      runtime process image.  We need to remember the offset into the
3046      .rela.bss section we are going to use.  */
3047   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
3048     {
3049       asection *srel;
3050 
3051       srel = bfd_get_linker_section (dynobj, ".rela.bss");
3052       BFD_ASSERT (srel != NULL);
3053       srel->size += sizeof (Elf32_External_Rela);
3054       h->needs_copy = 1;
3055     }
3056 
3057   return _bfd_elf_adjust_dynamic_copy (h, s);
3058 }
3059 
3060 /* Adjust our "subclass" elements for an indirect symbol.  */
3061 
3062 static void
elf_cris_copy_indirect_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * dir,struct elf_link_hash_entry * ind)3063 elf_cris_copy_indirect_symbol (struct bfd_link_info *info,
3064 			       struct elf_link_hash_entry *dir,
3065 			       struct elf_link_hash_entry *ind)
3066 {
3067   struct elf_cris_link_hash_entry *edir, *eind;
3068 
3069   edir = (struct elf_cris_link_hash_entry *) dir;
3070   eind = (struct elf_cris_link_hash_entry *) ind;
3071 
3072   /* Only indirect symbols are replaced; we're not interested in
3073      updating any of EIND's fields for other symbols.  */
3074   if (eind->root.root.type != bfd_link_hash_indirect)
3075     {
3076       /* Still, we need to copy flags for e.g. weak definitions.  */
3077       _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3078       return;
3079     }
3080 
3081   BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0);
3082 
3083 #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z
3084 #define XMOVE(F) XMOVOPZ (F, +=, 0)
3085   if (eind->pcrel_relocs_copied != NULL)
3086     {
3087       if (edir->pcrel_relocs_copied != NULL)
3088 	{
3089 	  struct elf_cris_pcrel_relocs_copied **pp;
3090 	  struct elf_cris_pcrel_relocs_copied *p;
3091 
3092 	  /* Add reloc counts against the indirect sym to the direct sym
3093 	     list.  Merge any entries against the same section.  */
3094 	  for (pp = &eind->pcrel_relocs_copied; *pp != NULL;)
3095 	    {
3096 	      struct elf_cris_pcrel_relocs_copied *q;
3097 	      p = *pp;
3098 	      for (q = edir->pcrel_relocs_copied; q != NULL; q = q->next)
3099 		if (q->section == p->section)
3100 		  {
3101 		    q->count += p->count;
3102 		    *pp = p->next;
3103 		    break;
3104 		  }
3105 	      if (q == NULL)
3106 		pp = &p->next;
3107 	    }
3108 	  *pp = edir->pcrel_relocs_copied;
3109 	}
3110       XMOVOPZ (pcrel_relocs_copied, =, NULL);
3111     }
3112   XMOVE (gotplt_refcount);
3113   XMOVE (gotplt_offset);
3114   XMOVE (reg_got_refcount);
3115   XMOVE (tprel_refcount);
3116   XMOVE (dtp_refcount);
3117 #undef XMOVE
3118 #undef XMOVOPZ
3119 
3120   _bfd_elf_link_hash_copy_indirect (info, dir, ind);
3121 }
3122 
3123 /* Look through the relocs for a section during the first phase.  */
3124 
3125 static bfd_boolean
cris_elf_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)3126 cris_elf_check_relocs (bfd *abfd,
3127 		       struct bfd_link_info *info,
3128 		       asection *sec,
3129 		       const Elf_Internal_Rela *relocs)
3130 {
3131   struct elf_cris_link_hash_table * htab;
3132   bfd *dynobj;
3133   Elf_Internal_Shdr *symtab_hdr;
3134   struct elf_link_hash_entry **sym_hashes;
3135   bfd_signed_vma *local_got_refcounts;
3136   const Elf_Internal_Rela *rel;
3137   const Elf_Internal_Rela *rel_end;
3138   asection *sgot;
3139   asection *srelgot;
3140   asection *sreloc;
3141 
3142   if (info->relocatable)
3143     return TRUE;
3144 
3145   htab = elf_cris_hash_table (info);
3146   if (htab == NULL)
3147     return FALSE;
3148 
3149   dynobj = elf_hash_table (info)->dynobj;
3150   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3151   sym_hashes = elf_sym_hashes (abfd);
3152   local_got_refcounts = elf_local_got_refcounts (abfd);
3153 
3154   sgot = NULL;
3155   srelgot = NULL;
3156   sreloc = NULL;
3157 
3158   rel_end = relocs + sec->reloc_count;
3159   for (rel = relocs; rel < rel_end; rel++)
3160     {
3161       struct elf_link_hash_entry *h;
3162       unsigned long r_symndx;
3163       enum elf_cris_reloc_type r_type;
3164       bfd_signed_vma got_element_size = 4;
3165       unsigned long r_symndx_lgot = INT_MAX;
3166 
3167       r_symndx = ELF32_R_SYM (rel->r_info);
3168       if (r_symndx < symtab_hdr->sh_info)
3169 	{
3170 	  h = NULL;
3171 	  r_symndx_lgot = LGOT_REG_NDX (r_symndx);
3172 	}
3173       else
3174 	{
3175 	  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3176 	  while (h->root.type == bfd_link_hash_indirect
3177 		 || h->root.type == bfd_link_hash_warning)
3178 	    h = (struct elf_link_hash_entry *) h->root.u.i.link;
3179 
3180 	  /* PR15323, ref flags aren't set for references in the same
3181 	     object.  */
3182 	  h->root.non_ir_ref = 1;
3183 	}
3184 
3185       r_type = ELF32_R_TYPE (rel->r_info);
3186 
3187       /* Some relocs require linker-created sections; we need to hang them
3188 	 on the first input bfd we found that contained dynamic relocs.  */
3189       switch (r_type)
3190 	{
3191 	case R_CRIS_32_DTPREL:
3192 	  if ((sec->flags & SEC_ALLOC) == 0)
3193 	    /* This'd be a .dtpreld entry in e.g. debug info.  We have
3194 	       several different switch statements below, but none of
3195 	       that is needed; we need no preparations for resolving
3196 	       R_CRIS_32_DTPREL into a non-allocated section (debug
3197 	       info), so let's just move on to the next
3198 	       relocation.  */
3199 	    continue;
3200 	  /* Fall through.  */
3201 	case R_CRIS_16_DTPREL:
3202 	  /* The first .got.plt entry is right after the R_CRIS_DTPMOD
3203 	     entry at index 3. */
3204 	  if (htab->dtpmod_refcount == 0)
3205 	    htab->next_gotplt_entry += 8;
3206 
3207 	  htab->dtpmod_refcount++;
3208 	  /* Fall through.  */
3209 
3210 	case R_CRIS_32_IE:
3211 	case R_CRIS_32_GD:
3212 	case R_CRIS_16_GOT_GD:
3213 	case R_CRIS_32_GOT_GD:
3214 	case R_CRIS_32_GOT_TPREL:
3215 	case R_CRIS_16_GOT_TPREL:
3216 	case R_CRIS_16_GOT:
3217 	case R_CRIS_32_GOT:
3218 	case R_CRIS_32_GOTREL:
3219 	case R_CRIS_32_PLT_GOTREL:
3220 	case R_CRIS_32_PLT_PCREL:
3221 	case R_CRIS_16_GOTPLT:
3222 	case R_CRIS_32_GOTPLT:
3223 	  if (dynobj == NULL)
3224 	    {
3225 	      elf_hash_table (info)->dynobj = dynobj = abfd;
3226 
3227 	      /* We could handle this if we can get a handle on the
3228 		 output bfd in elf_cris_adjust_dynamic_symbol.  Failing
3229 		 that, we must insist on dynobj being a specific mach.  */
3230 	      if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
3231 		{
3232 		  (*_bfd_error_handler)
3233 		    (_("%B, section %A:\n  v10/v32 compatible object %s"
3234 		       " must not contain a PIC relocation"),
3235 		     abfd, sec);
3236 		  return FALSE;
3237 		}
3238 	    }
3239 
3240 	  if (sgot == NULL)
3241 	    {
3242 	      /* We may have a dynobj but no .got section, if machine-
3243 		 independent parts of the linker found a reason to create
3244 		 a dynobj.  We want to create the .got section now, so we
3245 		 can assume it's always present whenever there's a dynobj.
3246 		 It's ok to call this function more than once.  */
3247 	      if (!_bfd_elf_create_got_section (dynobj, info))
3248 		return FALSE;
3249 
3250 	      sgot = bfd_get_linker_section (dynobj, ".got");
3251 	    }
3252 
3253 	  if (local_got_refcounts == NULL)
3254 	    {
3255 	      bfd_size_type amt;
3256 
3257 	      /* We use index local_got_refcounts[-1] to count all
3258 		 GOT-relative relocations that do not have explicit
3259 		 GOT entries.  */
3260 	      amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1;
3261 	      amt *= sizeof (bfd_signed_vma);
3262 	      local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
3263 	      if (local_got_refcounts == NULL)
3264 		return FALSE;
3265 
3266 	      local_got_refcounts++;
3267 	      elf_local_got_refcounts (abfd) = local_got_refcounts;
3268 	    }
3269 	  break;
3270 
3271 	default:
3272 	  break;
3273 	}
3274 
3275       /* Some relocs require a global offset table (but perhaps not a
3276 	 specific GOT entry).  */
3277       switch (r_type)
3278 	{
3279 	case R_CRIS_16_DTPREL:
3280 	case R_CRIS_32_DTPREL:
3281 	  /* Not requesting .got.rela for an executable: the contents
3282 	     of the first entry is constant there.  For a shared
3283 	     library, we need .got.rela for the R_CRIS_DTPMOD
3284 	     relocation at index 3.  */
3285 	  if (!info->shared)
3286 	    break;
3287 	  /* Fall through.  */
3288 
3289 	case R_CRIS_32_IE:
3290 	case R_CRIS_32_GD:
3291 	case R_CRIS_16_GOT_GD:
3292 	case R_CRIS_32_GOT_GD:
3293 	case R_CRIS_32_GOT_TPREL:
3294 	case R_CRIS_16_GOT_TPREL:
3295 	  /* Fall through.  */
3296 
3297 	  /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
3298 	     entry only for local symbols.  Unfortunately, we don't know
3299 	     until later on if there's a version script that forces the
3300 	     symbol local.  We must have the .rela.got section in place
3301 	     before we know if the symbol looks global now, so we need
3302 	     to treat the reloc just like for R_CRIS_16_GOT and
3303 	     R_CRIS_32_GOT.  */
3304 	case R_CRIS_16_GOTPLT:
3305 	case R_CRIS_32_GOTPLT:
3306 	case R_CRIS_16_GOT:
3307 	case R_CRIS_32_GOT:
3308 	  if (srelgot == NULL
3309 	      && (h != NULL || info->shared))
3310 	    {
3311 	      srelgot = bfd_get_linker_section (dynobj, ".rela.got");
3312 	      if (srelgot == NULL)
3313 		{
3314 		  flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3315 				    | SEC_IN_MEMORY | SEC_LINKER_CREATED
3316 				    | SEC_READONLY);
3317 		  srelgot = bfd_make_section_anyway_with_flags (dynobj,
3318 								".rela.got",
3319 								flags);
3320 		  if (srelgot == NULL
3321 		      || !bfd_set_section_alignment (dynobj, srelgot, 2))
3322 		    return FALSE;
3323 		}
3324 	    }
3325 	  break;
3326 
3327 	default:
3328 	  break;
3329 	}
3330 
3331       /* Warn and error for invalid input.  */
3332       switch (r_type)
3333 	{
3334 	case R_CRIS_32_IE:
3335 	case R_CRIS_32_TPREL:
3336 	case R_CRIS_16_TPREL:
3337 	case R_CRIS_32_GD:
3338 	  if (info->shared)
3339 	    {
3340 	      (*_bfd_error_handler)
3341 		(_("%B, section %A:\n  relocation %s not valid"
3342 		   " in a shared object;"
3343 		   " typically an option mixup, recompile with -fPIC"),
3344 		 abfd,
3345 		 sec,
3346 		 cris_elf_howto_table[r_type].name);
3347 	      /* Don't return FALSE here; we want messages for all of
3348 		 these and the error behavior is ungraceful
3349 		 anyway.  */
3350 	    }
3351 	default:
3352 	  break;
3353 	}
3354 
3355       switch (r_type)
3356 	{
3357 	case R_CRIS_32_GD:
3358 	case R_CRIS_16_GOT_GD:
3359 	case R_CRIS_32_GOT_GD:
3360 	  /* These are requests for tls_index entries, run-time R_CRIS_DTP.  */
3361 	  got_element_size = 8;
3362 	  r_symndx_lgot = LGOT_DTP_NDX (r_symndx);
3363 	  break;
3364 
3365 	case R_CRIS_16_DTPREL:
3366 	case R_CRIS_32_DTPREL:
3367 	  /* These two just request for the constant-index
3368 	     module-local tls_index-sized GOT entry, which we add
3369 	     elsewhere.  */
3370 	  break;
3371 
3372 	case R_CRIS_32_IE:
3373 	case R_CRIS_32_GOT_TPREL:
3374 	case R_CRIS_16_GOT_TPREL:
3375 	  r_symndx_lgot = LGOT_TPREL_NDX (r_symndx);
3376 
3377 	  /* Those relocs also require that a DSO is of type
3378 	     Initial Exec.  Like other targets, we don't reset this
3379 	     flag even if the relocs are GC:ed away.  */
3380 	  if (info->shared)
3381 	    info->flags |= DF_STATIC_TLS;
3382 	  break;
3383 
3384 	  /* Let's list the other assembler-generated TLS-relocs too,
3385 	     just to show that they're not forgotten. */
3386 	case R_CRIS_16_TPREL:
3387 	case R_CRIS_32_TPREL:
3388 	default:
3389 	  break;
3390 	}
3391 
3392       switch (r_type)
3393         {
3394 	case R_CRIS_16_GOTPLT:
3395 	case R_CRIS_32_GOTPLT:
3396 	  /* Mark that we need a GOT entry if the PLT entry (and its GOT
3397 	     entry) is eliminated.  We can only do this for a non-local
3398 	     symbol.  */
3399 	  if (h != NULL)
3400 	    {
3401 	      elf_cris_hash_entry (h)->gotplt_refcount++;
3402 	      goto handle_gotplt_reloc;
3403 	    }
3404 	  /* If h is NULL then this is a local symbol, and we must make a
3405 	     GOT entry for it, so handle it like a GOT reloc.  */
3406 	  /* Fall through.  */
3407 
3408 	case R_CRIS_32_IE:
3409 	case R_CRIS_32_GD:
3410 	case R_CRIS_16_GOT_GD:
3411 	case R_CRIS_32_GOT_GD:
3412 	case R_CRIS_32_GOT_TPREL:
3413 	case R_CRIS_16_GOT_TPREL:
3414 	case R_CRIS_16_GOT:
3415 	case R_CRIS_32_GOT:
3416 	  /* This symbol requires a global offset table entry.  */
3417 	  if (h != NULL)
3418 	    {
3419 	      if (h->got.refcount == 0)
3420 		{
3421 		  /* Make sure this symbol is output as a dynamic symbol.  */
3422 		  if (h->dynindx == -1)
3423 		    {
3424 		      if (!bfd_elf_link_record_dynamic_symbol (info, h))
3425 			return FALSE;
3426 		    }
3427 		}
3428 
3429 	      /* Update the sum of reloc counts for this symbol.  */
3430 	      h->got.refcount++;
3431 
3432 	      switch (r_type)
3433 		{
3434 		case R_CRIS_16_GOT:
3435 		case R_CRIS_32_GOT:
3436 		  if (elf_cris_hash_entry (h)->reg_got_refcount == 0)
3437 		    {
3438 		      /* Allocate space in the .got section.  */
3439 		      sgot->size += got_element_size;
3440 		      /* Allocate relocation space.  */
3441 		      srelgot->size += sizeof (Elf32_External_Rela);
3442 		    }
3443 		  elf_cris_hash_entry (h)->reg_got_refcount++;
3444 		  break;
3445 
3446 		case R_CRIS_32_GD:
3447 		case R_CRIS_16_GOT_GD:
3448 		case R_CRIS_32_GOT_GD:
3449 		  if (elf_cris_hash_entry (h)->dtp_refcount == 0)
3450 		    {
3451 		      /* Allocate space in the .got section.  */
3452 		      sgot->size += got_element_size;
3453 		      /* Allocate relocation space.  */
3454 		      srelgot->size += sizeof (Elf32_External_Rela);
3455 		    }
3456 		  elf_cris_hash_entry (h)->dtp_refcount++;
3457 		  break;
3458 
3459 		case R_CRIS_32_IE:
3460 		case R_CRIS_32_GOT_TPREL:
3461 		case R_CRIS_16_GOT_TPREL:
3462 		  if (elf_cris_hash_entry (h)->tprel_refcount == 0)
3463 		    {
3464 		      /* Allocate space in the .got section.  */
3465 		      sgot->size += got_element_size;
3466 		      /* Allocate relocation space.  */
3467 		      srelgot->size += sizeof (Elf32_External_Rela);
3468 		    }
3469 		  elf_cris_hash_entry (h)->tprel_refcount++;
3470 		  break;
3471 
3472 		default:
3473 		  BFD_FAIL ();
3474 		  break;
3475 		}
3476 	    }
3477 	  else
3478 	    {
3479 	      /* This is a global offset table entry for a local symbol.  */
3480 	      if (local_got_refcounts[r_symndx_lgot] == 0)
3481 		{
3482 		  sgot->size += got_element_size;
3483 		  if (info->shared)
3484 		    {
3485 		      /* If we are generating a shared object, we need
3486 			 to output a R_CRIS_RELATIVE reloc so that the
3487 			 dynamic linker can adjust this GOT entry.
3488 			 Similarly for non-regular got entries.  */
3489 		      srelgot->size += sizeof (Elf32_External_Rela);
3490 		    }
3491 		}
3492 	      /* Update the reloc-specific count.  */
3493 	      local_got_refcounts[r_symndx_lgot]++;
3494 
3495 	      /* This one is the sum of all the others.  */
3496 	      local_got_refcounts[r_symndx]++;
3497 	    }
3498 	  break;
3499 
3500 	case R_CRIS_16_DTPREL:
3501 	case R_CRIS_32_DTPREL:
3502 	case R_CRIS_32_GOTREL:
3503 	  /* This reference requires a global offset table.
3504 	     FIXME: The actual refcount isn't used currently; the .got
3505 	     section can't be removed if there were any references in the
3506 	     input.  */
3507 	  local_got_refcounts[-1]++;
3508 	  break;
3509 
3510 	handle_gotplt_reloc:
3511 
3512 	case R_CRIS_32_PLT_GOTREL:
3513 	  /* This reference requires a global offset table.  */
3514 	  local_got_refcounts[-1]++;
3515 	  /* Fall through.  */
3516 
3517 	case R_CRIS_32_PLT_PCREL:
3518 	  /* This symbol requires a procedure linkage table entry.  We
3519 	     actually build the entry in adjust_dynamic_symbol,
3520              because this might be a case of linking PIC code which is
3521              never referenced by a dynamic object, in which case we
3522              don't need to generate a procedure linkage table entry
3523              after all.  */
3524 
3525 	  /* Beware: if we'd check for visibility of the symbol here
3526 	     (and not marking the need for a PLT when non-visible), we'd
3527 	     get into trouble with keeping handling consistent with
3528 	     regards to relocs found before definition and GOTPLT
3529 	     handling.  Eliminable PLT entries will be dealt with later
3530 	     anyway.  */
3531 	  if (h == NULL)
3532 	    continue;
3533 
3534 	  h->needs_plt = 1;
3535 	  h->plt.refcount++;
3536 	  break;
3537 
3538 	case R_CRIS_8:
3539 	case R_CRIS_16:
3540 	case R_CRIS_32:
3541 	  /* Let's help debug shared library creation.  Any of these
3542 	     relocs *can* be used in shared libs, but pages containing
3543 	     them cannot be shared, so they're not appropriate for
3544 	     common use.  Don't warn for sections we don't care about,
3545 	     such as debug sections or non-constant sections.  We
3546 	     can't help tables of (global) function pointers, for
3547 	     example, though they must be emitted in a (writable) data
3548 	     section to avoid having impure text sections.  */
3549 	  if (info->shared
3550 	      && (sec->flags & SEC_ALLOC) != 0
3551 	      && (sec->flags & SEC_READONLY) != 0)
3552 	    {
3553 	      /* FIXME: How do we make this optionally a warning only?  */
3554 	      (*_bfd_error_handler)
3555 		(_("%B, section %A:\n  relocation %s should not"
3556 		   " be used in a shared object; recompile with -fPIC"),
3557 		 abfd,
3558 		 sec,
3559 		 cris_elf_howto_table[r_type].name);
3560 	    }
3561 
3562 	  /* We don't need to handle relocs into sections not going into
3563 	     the "real" output.  */
3564 	  if ((sec->flags & SEC_ALLOC) == 0)
3565 	    break;
3566 
3567 	  if (h != NULL)
3568 	    {
3569 	      h->non_got_ref = 1;
3570 
3571 	      /* Make sure a plt entry is created for this symbol if it
3572 		 turns out to be a function defined by a dynamic object.  */
3573 	      if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3574 		h->plt.refcount++;
3575 	    }
3576 
3577 	  /* If we are creating a shared library and this is not a local
3578 	     symbol, we need to copy the reloc into the shared library.
3579 	     However when linking with -Bsymbolic and this is a global
3580 	     symbol which is defined in an object we are including in the
3581 	     link (i.e., DEF_REGULAR is set), then we can resolve the
3582 	     reloc directly.  At this point we have not seen all the input
3583 	     files, so it is possible that DEF_REGULAR is not set now but
3584 	     will be set later (it is never cleared).  In case of a weak
3585 	     definition, DEF_REGULAR may be cleared later by a strong
3586 	     definition in a shared library.  We account for that
3587 	     possibility below by storing information in the relocs_copied
3588 	     field of the hash table entry.  A similar situation occurs
3589 	     when creating shared libraries and symbol visibility changes
3590 	     render the symbol local.  */
3591 
3592 	  /* No need to do anything if we're not creating a shared object.  */
3593 	  if (! info->shared)
3594 	    break;
3595 
3596 	  /* We may need to create a reloc section in the dynobj and made room
3597 	     for this reloc.  */
3598 	  if (sreloc == NULL)
3599 	    {
3600 	      sreloc = _bfd_elf_make_dynamic_reloc_section
3601 		(sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3602 
3603 	      if (sreloc == NULL)
3604 		return FALSE;
3605 	    }
3606 
3607 	  if (sec->flags & SEC_READONLY)
3608 	    info->flags |= DF_TEXTREL;
3609 
3610 	  sreloc->size += sizeof (Elf32_External_Rela);
3611 	  break;
3612 
3613 	case R_CRIS_8_PCREL:
3614 	case R_CRIS_16_PCREL:
3615 	case R_CRIS_32_PCREL:
3616 	  if (h != NULL)
3617 	    {
3618 	      h->non_got_ref = 1;
3619 
3620 	      /* Make sure a plt entry is created for this symbol if it
3621 		 turns out to be a function defined by a dynamic object.  */
3622 	      if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3623 		h->plt.refcount++;
3624 	    }
3625 
3626 	  /* If we are creating a shared library and this is not a local
3627 	     symbol, we need to copy the reloc into the shared library.
3628 	     However when linking with -Bsymbolic and this is a global
3629 	     symbol which is defined in an object we are including in the
3630 	     link (i.e., DEF_REGULAR is set), then we can resolve the
3631 	     reloc directly.  At this point we have not seen all the input
3632 	     files, so it is possible that DEF_REGULAR is not set now but
3633 	     will be set later (it is never cleared).  In case of a weak
3634 	     definition, DEF_REGULAR may be cleared later by a strong
3635 	     definition in a shared library.  We account for that
3636 	     possibility below by storing information in the relocs_copied
3637 	     field of the hash table entry.  A similar situation occurs
3638 	     when creating shared libraries and symbol visibility changes
3639 	     render the symbol local.  */
3640 
3641 	  /* No need to do anything if we're not creating a shared object.  */
3642 	  if (! info->shared)
3643 	    break;
3644 
3645 	  /* We don't need to handle relocs into sections not going into
3646 	     the "real" output.  */
3647 	  if ((sec->flags & SEC_ALLOC) == 0)
3648 	    break;
3649 
3650 	  /* If the symbol is local, then we know already we can
3651 	     eliminate the reloc.  */
3652 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3653 	    break;
3654 
3655 	  /* If this is with -Bsymbolic and the symbol isn't weak, and
3656 	     is defined by an ordinary object (the ones we include in
3657 	     this shared library) then we can also eliminate the
3658 	     reloc.  See comment above for more eliminable cases which
3659 	     we can't identify at this time.  */
3660 	  if (info->symbolic
3661 	      && h->root.type != bfd_link_hash_defweak
3662 	      && h->def_regular)
3663 	    break;
3664 
3665 	  /* We may need to create a reloc section in the dynobj and made room
3666 	     for this reloc.  */
3667 	  if (sreloc == NULL)
3668 	    {
3669 	      sreloc = _bfd_elf_make_dynamic_reloc_section
3670 		(sec, dynobj, 2, abfd, /*rela?*/ TRUE);
3671 
3672 	      if (sreloc == NULL)
3673 		return FALSE;
3674 	    }
3675 
3676 	  sreloc->size += sizeof (Elf32_External_Rela);
3677 
3678 	  /* We count the number of PC relative relocations we have
3679 	     entered for this symbol, so that we can discard them
3680 	     again if the symbol is later defined by a regular object.
3681 	     We know that h is really a pointer to an
3682 	     elf_cris_link_hash_entry.  */
3683 	  {
3684 	    struct elf_cris_link_hash_entry *eh;
3685 	    struct elf_cris_pcrel_relocs_copied *p;
3686 
3687 	    eh = elf_cris_hash_entry (h);
3688 
3689 	    for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
3690 	      if (p->section == sec)
3691 		break;
3692 
3693 	    if (p == NULL)
3694 	      {
3695 		p = ((struct elf_cris_pcrel_relocs_copied *)
3696 		     bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
3697 		if (p == NULL)
3698 		  return FALSE;
3699 		p->next = eh->pcrel_relocs_copied;
3700 		eh->pcrel_relocs_copied = p;
3701 		p->section = sec;
3702 		p->count = 0;
3703 		p->r_type = r_type;
3704 	      }
3705 
3706 	    ++p->count;
3707 	  }
3708 	  break;
3709 
3710         /* This relocation describes the C++ object vtable hierarchy.
3711            Reconstruct it for later use during GC.  */
3712         case R_CRIS_GNU_VTINHERIT:
3713           if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3714             return FALSE;
3715           break;
3716 
3717         /* This relocation describes which C++ vtable entries are actually
3718            used.  Record for later use during GC.  */
3719         case R_CRIS_GNU_VTENTRY:
3720           BFD_ASSERT (h != NULL);
3721           if (h != NULL
3722               && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3723             return FALSE;
3724           break;
3725 
3726 	case R_CRIS_16_TPREL:
3727 	case R_CRIS_32_TPREL:
3728 	  /* Already warned above, when necessary.  */
3729 	  break;
3730 
3731 	default:
3732 	  /* Other relocs do not appear here.  */
3733 	  bfd_set_error (bfd_error_bad_value);
3734 	  return FALSE;
3735         }
3736     }
3737 
3738   return TRUE;
3739 }
3740 
3741 /* Set the sizes of the dynamic sections.  */
3742 
3743 static bfd_boolean
elf_cris_size_dynamic_sections(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)3744 elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3745 				struct bfd_link_info *info)
3746 {
3747   struct elf_cris_link_hash_table * htab;
3748   bfd *dynobj;
3749   asection *s;
3750   bfd_boolean plt;
3751   bfd_boolean relocs;
3752 
3753   htab = elf_cris_hash_table (info);
3754   if (htab == NULL)
3755     return FALSE;
3756 
3757   dynobj = elf_hash_table (info)->dynobj;
3758   BFD_ASSERT (dynobj != NULL);
3759 
3760   if (elf_hash_table (info)->dynamic_sections_created)
3761     {
3762       /* Set the contents of the .interp section to the interpreter.  */
3763       if (info->executable)
3764 	{
3765 	  s = bfd_get_linker_section (dynobj, ".interp");
3766 	  BFD_ASSERT (s != NULL);
3767 	  s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3768 	  s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3769 	}
3770     }
3771   else
3772     {
3773       /* Adjust all expected GOTPLT uses to use a GOT entry instead.  */
3774       elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got,
3775 				   info);
3776 
3777       /* We may have created entries in the .rela.got section.
3778 	 However, if we are not creating the dynamic sections, we will
3779 	 not actually use these entries.  Reset the size of .rela.got,
3780 	 which will cause it to get stripped from the output file
3781 	 below.  */
3782       s = bfd_get_linker_section (dynobj, ".rela.got");
3783       if (s != NULL)
3784 	s->size = 0;
3785     }
3786 
3787   /* If this is a -Bsymbolic shared link, then we need to discard all PC
3788      relative relocs against symbols defined in a regular object.  We
3789      allocated space for them in the check_relocs routine, but we will not
3790      fill them in in the relocate_section routine.  We also discard space
3791      for relocs that have become for local symbols due to symbol
3792      visibility changes.  For programs, we discard space for relocs for
3793      symbols not referenced by any dynamic object.  */
3794   if (info->shared)
3795     elf_cris_link_hash_traverse (htab,
3796 				 elf_cris_discard_excess_dso_dynamics,
3797 				 info);
3798   else
3799     elf_cris_link_hash_traverse (htab,
3800 				 elf_cris_discard_excess_program_dynamics,
3801 				 info);
3802 
3803   /* The check_relocs and adjust_dynamic_symbol entry points have
3804      determined the sizes of the various dynamic sections.  Allocate
3805      memory for them.  */
3806   plt = FALSE;
3807   relocs = FALSE;
3808   for (s = dynobj->sections; s != NULL; s = s->next)
3809     {
3810       const char *name;
3811 
3812       if ((s->flags & SEC_LINKER_CREATED) == 0)
3813 	continue;
3814 
3815       /* It's OK to base decisions on the section name, because none
3816 	 of the dynobj section names depend upon the input files.  */
3817       name = bfd_get_section_name (dynobj, s);
3818 
3819       if (strcmp (name, ".plt") == 0)
3820 	{
3821 	  /* Remember whether there is a PLT.  */
3822 	  plt = s->size != 0;
3823 	}
3824       else if (strcmp (name, ".got.plt") == 0)
3825 	{
3826 	  /* The .got.plt contains the .got header as well as the
3827 	     actual .got.plt contents.  The .got header may contain a
3828 	     R_CRIS_DTPMOD entry at index 3.  */
3829 	  s->size += htab->dtpmod_refcount != 0
3830 	    ? 8 : 0;
3831 	}
3832       else if (CONST_STRNEQ (name, ".rela"))
3833 	{
3834 	  if (strcmp (name, ".rela.got") == 0
3835 	      && htab->dtpmod_refcount != 0
3836 	      && info->shared)
3837 	    s->size += sizeof (Elf32_External_Rela);
3838 
3839 	  if (s->size != 0)
3840 	    {
3841 	      /* Remember whether there are any reloc sections other
3842                  than .rela.plt.  */
3843 	      if (strcmp (name, ".rela.plt") != 0)
3844 		  relocs = TRUE;
3845 
3846 	      /* We use the reloc_count field as a counter if we need
3847 		 to copy relocs into the output file.  */
3848 	      s->reloc_count = 0;
3849 	    }
3850 	}
3851       else if (! CONST_STRNEQ (name, ".got")
3852 	       && strcmp (name, ".dynbss") != 0)
3853 	{
3854 	  /* It's not one of our sections, so don't allocate space.  */
3855 	  continue;
3856 	}
3857 
3858       if (s->size == 0)
3859 	{
3860 	  /* If we don't need this section, strip it from the
3861 	     output file.  This is mostly to handle .rela.bss and
3862 	     .rela.plt.  We must create both sections in
3863 	     create_dynamic_sections, because they must be created
3864 	     before the linker maps input sections to output
3865 	     sections.  The linker does that before
3866 	     adjust_dynamic_symbol is called, and it is that
3867 	     function which decides whether anything needs to go
3868 	     into these sections.  */
3869 	  s->flags |= SEC_EXCLUDE;
3870 	  continue;
3871 	}
3872 
3873       if ((s->flags & SEC_HAS_CONTENTS) == 0)
3874 	continue;
3875 
3876       /* Allocate memory for the section contents. We use bfd_zalloc here
3877 	 in case unused entries are not reclaimed before the section's
3878 	 contents are written out.  This should not happen, but this way
3879 	 if it does, we will not write out garbage.  For reloc sections,
3880 	 this will make entries have the type R_CRIS_NONE.  */
3881       s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3882       if (s->contents == NULL)
3883 	return FALSE;
3884     }
3885 
3886   if (elf_hash_table (info)->dynamic_sections_created)
3887     {
3888       /* Add some entries to the .dynamic section.  We fill in the
3889 	 values later, in elf_cris_finish_dynamic_sections, but we
3890 	 must add the entries now so that we get the correct size for
3891 	 the .dynamic section.  The DT_DEBUG entry is filled in by the
3892 	 dynamic linker and used by the debugger.  */
3893 #define add_dynamic_entry(TAG, VAL) \
3894   _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3895 
3896       if (!info->shared)
3897 	{
3898 	  if (!add_dynamic_entry (DT_DEBUG, 0))
3899 	    return FALSE;
3900 	}
3901 
3902       if (plt)
3903 	{
3904 	  if (!add_dynamic_entry (DT_PLTGOT, 0)
3905 	      || !add_dynamic_entry (DT_PLTRELSZ, 0)
3906 	      || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3907 	      || !add_dynamic_entry (DT_JMPREL, 0))
3908 	    return FALSE;
3909 	}
3910 
3911       if (relocs)
3912 	{
3913 	  if (!add_dynamic_entry (DT_RELA, 0)
3914 	      || !add_dynamic_entry (DT_RELASZ, 0)
3915 	      || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3916 	    return FALSE;
3917 	}
3918 
3919       if ((info->flags & DF_TEXTREL) != 0)
3920 	{
3921 	  if (!add_dynamic_entry (DT_TEXTREL, 0))
3922 	    return FALSE;
3923 	  info->flags |= DF_TEXTREL;
3924 	}
3925     }
3926 #undef add_dynamic_entry
3927 
3928   return TRUE;
3929 }
3930 
3931 /* This function is called via elf_cris_link_hash_traverse if we are
3932    creating a shared object.  In the -Bsymbolic case, it discards the
3933    space allocated to copy PC relative relocs against symbols which
3934    are defined in regular objects.  For the normal non-symbolic case,
3935    we also discard space for relocs that have become local due to
3936    symbol visibility changes.  We allocated space for them in the
3937    check_relocs routine, but we won't fill them in in the
3938    relocate_section routine.  */
3939 
3940 static bfd_boolean
elf_cris_discard_excess_dso_dynamics(struct elf_cris_link_hash_entry * h,void * inf)3941 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *h,
3942 				      void * inf)
3943 {
3944   struct elf_cris_pcrel_relocs_copied *s;
3945   struct bfd_link_info *info = (struct bfd_link_info *) inf;
3946 
3947   /* If a symbol has been forced local or we have found a regular
3948      definition for the symbolic link case, then we won't be needing
3949      any relocs.  */
3950   if (h->root.def_regular
3951       && (h->root.forced_local
3952 	  || info->symbolic))
3953     {
3954       for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3955 	{
3956 	  asection *sreloc
3957 	    = _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info)
3958 						  ->dynobj,
3959 						  s->section,
3960 						  /*rela?*/ TRUE);
3961 	  sreloc->size -= s->count * sizeof (Elf32_External_Rela);
3962 	}
3963       return TRUE;
3964     }
3965 
3966   /* If we have accounted for PC-relative relocs for read-only
3967      sections, now is the time to warn for them.  We can't do it in
3968      cris_elf_check_relocs, because we don't know the status of all
3969      symbols at that time (and it's common to force symbols local
3970      late).  */
3971 
3972   for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3973     if ((s->section->flags & SEC_READONLY) != 0)
3974       {
3975 	/* FIXME: How do we make this optionally a warning only?  */
3976 	(*_bfd_error_handler)
3977 	  (_("%B, section `%A', to symbol `%s':\n"
3978 	     "  relocation %s should not be used"
3979 	     " in a shared object; recompile with -fPIC"),
3980 	   s->section->owner,
3981 	   s->section,
3982 	   h->root.root.root.string,
3983 	   cris_elf_howto_table[s->r_type].name);
3984 
3985 	info->flags |= DF_TEXTREL;
3986       }
3987 
3988   return TRUE;
3989 }
3990 
3991 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3992    creating a shared object.  We discard space for relocs for symbols put
3993    in the .got, but which we found we do not have to resolve at run-time.  */
3994 
3995 static bfd_boolean
elf_cris_discard_excess_program_dynamics(struct elf_cris_link_hash_entry * h,void * inf)3996 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *h,
3997 					  void * inf)
3998 {
3999   struct bfd_link_info *info = (struct bfd_link_info *) inf;
4000 
4001   /* If we're not creating a shared library and have a symbol which is
4002      referred to by .got references, but the symbol is defined locally,
4003      (or rather, not defined by a DSO) then lose the reloc for the .got
4004      (don't allocate room for it).  Likewise for relocs for something
4005      for which we create a PLT.  */
4006   if (!h->root.def_dynamic
4007       || h->root.plt.refcount > 0)
4008     {
4009       if (h->reg_got_refcount > 0
4010 	  /* The size of this section is only valid and in sync with the
4011 	     various reference counts if we do dynamic; don't decrement it
4012 	     otherwise.  */
4013 	  && elf_hash_table (info)->dynamic_sections_created)
4014 	{
4015 	  bfd *dynobj = elf_hash_table (info)->dynobj;
4016 	  asection *srelgot;
4017 
4018 	  BFD_ASSERT (dynobj != NULL);
4019 
4020 	  srelgot = bfd_get_linker_section (dynobj, ".rela.got");
4021 
4022 	  BFD_ASSERT (srelgot != NULL);
4023 
4024 	  srelgot->size -= sizeof (Elf32_External_Rela);
4025 	}
4026 
4027       /* If the locally-defined symbol isn't used by a DSO, then we don't
4028 	 have to export it as a dynamic symbol.  This was already done for
4029 	 functions; doing this for all symbols would presumably not
4030 	 introduce new problems.  Of course we don't do this if we're
4031 	 exporting all dynamic symbols.  */
4032       if (! info->export_dynamic
4033 	  && h->root.dynindx != -1
4034 	  && !h->root.def_dynamic
4035 	  && !h->root.ref_dynamic)
4036 	{
4037 	  h->root.dynindx = -1;
4038 	  _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
4039 				  h->root.dynstr_index);
4040 	}
4041     }
4042 
4043   return TRUE;
4044 }
4045 
4046 /* Reject a file depending on presence and expectation of prefixed
4047    underscores on symbols.  */
4048 
4049 static bfd_boolean
cris_elf_object_p(bfd * abfd)4050 cris_elf_object_p (bfd *abfd)
4051 {
4052   if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
4053     return FALSE;
4054 
4055   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
4056     return (bfd_get_symbol_leading_char (abfd) == '_');
4057   else
4058     return (bfd_get_symbol_leading_char (abfd) == 0);
4059 }
4060 
4061 /* Mark presence or absence of leading underscore.  Set machine type
4062    flags from mach type.  */
4063 
4064 static void
cris_elf_final_write_processing(bfd * abfd,bfd_boolean linker ATTRIBUTE_UNUSED)4065 cris_elf_final_write_processing (bfd *abfd,
4066 				 bfd_boolean linker ATTRIBUTE_UNUSED)
4067 {
4068   unsigned long e_flags = elf_elfheader (abfd)->e_flags;
4069 
4070   e_flags &= ~EF_CRIS_UNDERSCORE;
4071   if (bfd_get_symbol_leading_char (abfd) == '_')
4072     e_flags |= EF_CRIS_UNDERSCORE;
4073 
4074   switch (bfd_get_mach (abfd))
4075     {
4076     case bfd_mach_cris_v0_v10:
4077       e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
4078       break;
4079 
4080     case bfd_mach_cris_v10_v32:
4081       e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
4082       break;
4083 
4084     case bfd_mach_cris_v32:
4085       e_flags |= EF_CRIS_VARIANT_V32;
4086       break;
4087 
4088     default:
4089       _bfd_abort (__FILE__, __LINE__,
4090 		  _("Unexpected machine number"));
4091     }
4092 
4093   elf_elfheader (abfd)->e_flags = e_flags;
4094 }
4095 
4096 /* Set the mach type from e_flags value.  */
4097 
4098 static bfd_boolean
cris_elf_set_mach_from_flags(bfd * abfd,unsigned long flags)4099 cris_elf_set_mach_from_flags (bfd *abfd,
4100 			      unsigned long flags)
4101 {
4102   switch (flags & EF_CRIS_VARIANT_MASK)
4103     {
4104     case EF_CRIS_VARIANT_ANY_V0_V10:
4105       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
4106       break;
4107 
4108     case EF_CRIS_VARIANT_V32:
4109       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
4110       break;
4111 
4112     case EF_CRIS_VARIANT_COMMON_V10_V32:
4113       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
4114       break;
4115 
4116     default:
4117       /* Since we don't recognize them, we obviously can't support them
4118 	 with this code; we'd have to require that all future handling
4119 	 would be optional.  */
4120       bfd_set_error (bfd_error_wrong_format);
4121       return FALSE;
4122     }
4123 
4124   return TRUE;
4125 }
4126 
4127 /* Display the flags field.  */
4128 
4129 static bfd_boolean
cris_elf_print_private_bfd_data(bfd * abfd,void * ptr)4130 cris_elf_print_private_bfd_data (bfd *abfd, void * ptr)
4131 {
4132   FILE *file = (FILE *) ptr;
4133 
4134   BFD_ASSERT (abfd != NULL && ptr != NULL);
4135 
4136   _bfd_elf_print_private_bfd_data (abfd, ptr);
4137 
4138   fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
4139 
4140   if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
4141     fprintf (file, _(" [symbols have a _ prefix]"));
4142   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4143       == EF_CRIS_VARIANT_COMMON_V10_V32)
4144     fprintf (file, _(" [v10 and v32]"));
4145   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
4146       == EF_CRIS_VARIANT_V32)
4147     fprintf (file, _(" [v32]"));
4148 
4149   fputc ('\n', file);
4150   return TRUE;
4151 }
4152 
4153 /* Don't mix files with and without a leading underscore.  */
4154 
4155 static bfd_boolean
cris_elf_merge_private_bfd_data(bfd * ibfd,bfd * obfd)4156 cris_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
4157 {
4158   int imach, omach;
4159 
4160   if (! _bfd_generic_verify_endian_match (ibfd, obfd))
4161     return FALSE;
4162 
4163   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4164       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4165     return TRUE;
4166 
4167   imach = bfd_get_mach (ibfd);
4168 
4169   if (! elf_flags_init (obfd))
4170     {
4171       /* This happens when ld starts out with a 'blank' output file.  */
4172       elf_flags_init (obfd) = TRUE;
4173 
4174       /* We ignore the linker-set mach, and instead set it according to
4175 	 the first input file.  This would also happen if we could
4176 	 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
4177 	 This allows us to keep the same linker config across
4178 	 cris(v0..v10) and crisv32.  The drawback is that we can't force
4179 	 the output type, which might be a sane thing to do for a
4180 	 v10+v32 compatibility object.  */
4181       if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4182 	return FALSE;
4183     }
4184 
4185   if (bfd_get_symbol_leading_char (ibfd)
4186       != bfd_get_symbol_leading_char (obfd))
4187     {
4188       (*_bfd_error_handler)
4189 	(bfd_get_symbol_leading_char (ibfd) == '_'
4190 	 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
4191 	 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
4192 	 ibfd);
4193       bfd_set_error (bfd_error_bad_value);
4194       return FALSE;
4195     }
4196 
4197   omach = bfd_get_mach (obfd);
4198 
4199   if (imach != omach)
4200     {
4201       /* We can get an incompatible combination only if either is
4202 	 bfd_mach_cris_v32, and the other one isn't compatible.  */
4203       if ((imach == bfd_mach_cris_v32
4204 	   && omach != bfd_mach_cris_v10_v32)
4205 	  || (omach == bfd_mach_cris_v32
4206 	      && imach != bfd_mach_cris_v10_v32))
4207 	{
4208 	  (*_bfd_error_handler)
4209 	    ((imach == bfd_mach_cris_v32)
4210 	     ? _("%B contains CRIS v32 code, incompatible"
4211 		 " with previous objects")
4212 	     : _("%B contains non-CRIS-v32 code, incompatible"
4213 		 " with previous objects"),
4214 	     ibfd);
4215 	  bfd_set_error (bfd_error_bad_value);
4216 	  return FALSE;
4217 	}
4218 
4219       /* We don't have to check the case where the input is compatible
4220 	 with v10 and v32, because the output is already known to be set
4221 	 to the other (compatible) mach.  */
4222       if (omach == bfd_mach_cris_v10_v32
4223 	  && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
4224 	return FALSE;
4225     }
4226 
4227   return TRUE;
4228 }
4229 
4230 /* Do side-effects of e_flags copying to obfd.  */
4231 
4232 static bfd_boolean
cris_elf_copy_private_bfd_data(bfd * ibfd,bfd * obfd)4233 cris_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
4234 {
4235   /* Call the base function.  */
4236   if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
4237     return FALSE;
4238 
4239   /* If output is big-endian for some obscure reason, stop here.  */
4240   if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
4241     return FALSE;
4242 
4243   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
4244       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
4245     return TRUE;
4246 
4247   /* Do what we really came here for.  */
4248   return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
4249 }
4250 
4251 static enum elf_reloc_type_class
elf_cris_reloc_type_class(const struct bfd_link_info * info ATTRIBUTE_UNUSED,const asection * rel_sec ATTRIBUTE_UNUSED,const Elf_Internal_Rela * rela)4252 elf_cris_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
4253 			   const asection *rel_sec ATTRIBUTE_UNUSED,
4254 			   const Elf_Internal_Rela *rela)
4255 {
4256   enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info);
4257   switch (r_type)
4258     {
4259     case R_CRIS_RELATIVE:
4260       return reloc_class_relative;
4261     case R_CRIS_JUMP_SLOT:
4262       return reloc_class_plt;
4263     case R_CRIS_COPY:
4264       return reloc_class_copy;
4265     default:
4266       return reloc_class_normal;
4267     }
4268 }
4269 
4270 /* The elf_backend_got_elt_size worker.  For one symbol, we can have up to
4271    two GOT entries from three types with two different sizes.  We handle
4272    it as a single entry, so we can use the regular offset-calculation
4273    machinery.  */
4274 
4275 static bfd_vma
elf_cris_got_elt_size(bfd * abfd ATTRIBUTE_UNUSED,struct bfd_link_info * info ATTRIBUTE_UNUSED,struct elf_link_hash_entry * hr,bfd * ibfd,unsigned long symndx)4276 elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED,
4277 		       struct bfd_link_info *info ATTRIBUTE_UNUSED,
4278 		       struct elf_link_hash_entry *hr,
4279 		       bfd *ibfd,
4280 		       unsigned long symndx)
4281 {
4282   struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr;
4283   bfd_vma eltsiz = 0;
4284 
4285   /* We may have one regular GOT entry or up to two TLS GOT
4286      entries.  */
4287   if (h == NULL)
4288     {
4289       Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4290       bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd);
4291 
4292       BFD_ASSERT (local_got_refcounts != NULL);
4293 
4294       if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0)
4295 	{
4296 	  /* We can't have a variable referred to both as a regular
4297 	     variable and through TLS relocs.  */
4298 	  BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0
4299 		      && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0);
4300 	  return 4;
4301 	}
4302 
4303       if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0)
4304 	eltsiz += 8;
4305 
4306       if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0)
4307 	eltsiz += 4;
4308     }
4309   else
4310     {
4311       struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h);
4312       if (hh->reg_got_refcount > 0)
4313 	{
4314 	  /* The actual error-on-input is emitted elsewhere.  */
4315 	  BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0);
4316 	  return 4;
4317 	}
4318 
4319       if (hh->dtp_refcount > 0)
4320 	eltsiz += 8;
4321 
4322       if (hh->tprel_refcount > 0)
4323 	eltsiz += 4;
4324     }
4325 
4326   /* We're only called when h->got.refcount is non-zero, so we must
4327      have a non-zero size.  */
4328   BFD_ASSERT (eltsiz != 0);
4329   return eltsiz;
4330 }
4331 
4332 #define ELF_ARCH		bfd_arch_cris
4333 #define ELF_TARGET_ID		CRIS_ELF_DATA
4334 #define ELF_MACHINE_CODE	EM_CRIS
4335 #define ELF_MAXPAGESIZE		0x2000
4336 
4337 #define TARGET_LITTLE_SYM	cris_elf32_vec
4338 #define TARGET_LITTLE_NAME	"elf32-cris"
4339 #define elf_symbol_leading_char 0
4340 
4341 #define elf_info_to_howto_rel			NULL
4342 #define elf_info_to_howto			cris_info_to_howto_rela
4343 #define elf_backend_relocate_section		cris_elf_relocate_section
4344 #define elf_backend_gc_mark_hook		cris_elf_gc_mark_hook
4345 #define elf_backend_gc_sweep_hook		cris_elf_gc_sweep_hook
4346 #define elf_backend_plt_sym_val			cris_elf_plt_sym_val
4347 #define elf_backend_check_relocs                cris_elf_check_relocs
4348 #define elf_backend_grok_prstatus		cris_elf_grok_prstatus
4349 #define elf_backend_grok_psinfo			cris_elf_grok_psinfo
4350 
4351 #define elf_backend_can_gc_sections		1
4352 #define elf_backend_can_refcount		1
4353 
4354 #define elf_backend_object_p			cris_elf_object_p
4355 #define elf_backend_final_write_processing \
4356 	cris_elf_final_write_processing
4357 #define bfd_elf32_bfd_print_private_bfd_data \
4358 	cris_elf_print_private_bfd_data
4359 #define bfd_elf32_bfd_merge_private_bfd_data \
4360 	cris_elf_merge_private_bfd_data
4361 #define bfd_elf32_bfd_copy_private_bfd_data \
4362 	cris_elf_copy_private_bfd_data
4363 
4364 #define bfd_elf32_bfd_reloc_type_lookup		cris_reloc_type_lookup
4365 #define bfd_elf32_bfd_reloc_name_lookup	cris_reloc_name_lookup
4366 
4367 #define bfd_elf32_bfd_link_hash_table_create \
4368 	elf_cris_link_hash_table_create
4369 #define elf_backend_adjust_dynamic_symbol \
4370 	elf_cris_adjust_dynamic_symbol
4371 #define elf_backend_copy_indirect_symbol \
4372 	elf_cris_copy_indirect_symbol
4373 #define elf_backend_size_dynamic_sections \
4374 	elf_cris_size_dynamic_sections
4375 #define elf_backend_init_index_section		_bfd_elf_init_1_index_section
4376 #define elf_backend_finish_dynamic_symbol \
4377 	elf_cris_finish_dynamic_symbol
4378 #define elf_backend_finish_dynamic_sections \
4379 	elf_cris_finish_dynamic_sections
4380 #define elf_backend_create_dynamic_sections \
4381 	_bfd_elf_create_dynamic_sections
4382 #define bfd_elf32_bfd_final_link \
4383 	bfd_elf_gc_common_final_link
4384 #define elf_backend_hide_symbol			elf_cris_hide_symbol
4385 #define elf_backend_reloc_type_class		elf_cris_reloc_type_class
4386 
4387 #define elf_backend_want_got_plt	1
4388 #define elf_backend_plt_readonly	1
4389 #define elf_backend_want_plt_sym	0
4390 #define elf_backend_got_header_size	12
4391 #define elf_backend_got_elt_size elf_cris_got_elt_size
4392 
4393 /* Later, we my want to optimize RELA entries into REL entries for dynamic
4394    linking and libraries (if it's a win of any significance).  Until then,
4395    take the easy route.  */
4396 #define elf_backend_may_use_rel_p 0
4397 #define elf_backend_may_use_rela_p 1
4398 #define elf_backend_rela_normal		1
4399 
4400 #include "elf32-target.h"
4401 
4402 #undef TARGET_LITTLE_SYM
4403 #undef TARGET_LITTLE_NAME
4404 #undef elf_symbol_leading_char
4405 
4406 #define TARGET_LITTLE_SYM cris_elf32_us_vec
4407 #define TARGET_LITTLE_NAME "elf32-us-cris"
4408 #define elf_symbol_leading_char '_'
4409 #undef elf32_bed
4410 #define elf32_bed elf32_us_cris_bed
4411 
4412 #include "elf32-target.h"
4413