1 /* CRIS-specific support for 32-bit ELF.
2    Copyright (C) 2000-2021 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 bool
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 	 3,			/* size (0 = byte, 1 = short, 2 = long) */
44 	 0,			/* bitsize */
45 	 false,			/* pc_relative */
46 	 0,			/* bitpos */
47 	 complain_overflow_dont, /* 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 bool
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   if (r_type >= R_CRIS_max)
465     {
466       /* xgettext:c-format */
467       _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
468 			  abfd, r_type);
469       bfd_set_error (bfd_error_bad_value);
470       return false;
471     }
472   cache_ptr->howto = & cris_elf_howto_table [r_type];
473   return true;
474 }
475 
476 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)477 cris_elf_pcrel_reloc (bfd *abfd ATTRIBUTE_UNUSED,
478 		      arelent *reloc_entry,
479 		      asymbol *symbol,
480 		      void * data ATTRIBUTE_UNUSED,
481 		      asection *input_section,
482 		      bfd *output_bfd,
483 		      char **error_message ATTRIBUTE_UNUSED)
484 {
485   /* By default (using only bfd_elf_generic_reloc when linking to
486      non-ELF formats) PC-relative relocs are relative to the beginning
487      of the reloc.  CRIS PC-relative relocs are relative to the position
488      *after* the reloc because that's what pre-CRISv32 PC points to
489      after reading an insn field with that reloc.  (For CRISv32, PC is
490      actually relative to the start of the insn, but we keep the old
491      definition.)  Still, we use as much generic machinery as we can.
492 
493      Only adjust when doing a final link.  */
494   if (output_bfd == (bfd *) NULL)
495     reloc_entry->addend -= 1 << reloc_entry->howto->size;
496 
497   return
498     bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
499 			   input_section, output_bfd, error_message);
500 }
501 
502 /* Support for core dump NOTE sections.
503    The slightly unintuitive code layout is an attempt to keep at least
504    some similarities with other ports, hoping to simplify general
505    changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart.  */
506 
507 static bool
cris_elf_grok_prstatus(bfd * abfd,Elf_Internal_Note * note)508 cris_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
509 {
510   int offset;
511   size_t size;
512 
513   if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
514     switch (note->descsz)
515       {
516       default:
517 	return false;
518 
519       case 202:		/* Linux/CRISv32 */
520 	/* pr_cursig */
521 	elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
522 
523 	/* pr_pid */
524 	elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
525 
526 	/* pr_reg */
527 	offset = 70;
528 	size = 128;
529 
530 	break;
531       }
532   else
533     switch (note->descsz)
534       {
535       default:
536 	return false;
537 
538       case 214:		/* Linux/CRIS */
539 	/* pr_cursig */
540 	elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
541 
542 	/* pr_pid */
543 	elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 22);
544 
545 	/* pr_reg */
546 	offset = 70;
547 	size = 140;
548 
549 	break;
550       }
551 
552   /* Make a ".reg/999" section.  */
553   return _bfd_elfcore_make_pseudosection (abfd, ".reg",
554 					  size, note->descpos + offset);
555 }
556 
557 static bool
cris_elf_grok_psinfo(bfd * abfd,Elf_Internal_Note * note)558 cris_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
559 {
560   if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
561     switch (note->descsz)
562       {
563       default:
564 	return false;
565 
566       case 124:		/* Linux/CRISv32 elf_prpsinfo */
567 	elf_tdata (abfd)->core->program
568 	  = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
569 	elf_tdata (abfd)->core->command
570 	  = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
571       }
572   else
573     switch (note->descsz)
574       {
575       default:
576 	return false;
577 
578       case 124:		/* Linux/CRIS elf_prpsinfo */
579 	elf_tdata (abfd)->core->program
580 	  = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
581 	elf_tdata (abfd)->core->command
582 	  = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
583       }
584 
585   /* Note that for some reason, a spurious space is tacked
586      onto the end of the args in some (at least one anyway)
587      implementations, so strip it off if it exists.  */
588 
589   {
590     char *command = elf_tdata (abfd)->core->command;
591     int n = strlen (command);
592 
593     if (0 < n && command[n - 1] == ' ')
594       command[n - 1] = '\0';
595   }
596 
597   return true;
598 }
599 
600 /* The name of the dynamic interpreter.  This is put in the .interp
601    section.  */
602 
603 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
604 
605 /* The size in bytes of an entry in the procedure linkage table.  */
606 
607 #define PLT_ENTRY_SIZE 20
608 #define PLT_ENTRY_SIZE_V32 26
609 
610 /* The first entry in an absolute procedure linkage table looks like this.  */
611 
612 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
613 {
614   0xfc, 0xe1,
615   0x7e, 0x7e,	/* push mof.  */
616   0x7f, 0x0d,   /*  (dip [pc+]) */
617   0, 0, 0, 0,	/*  Replaced with address of .got + 4.  */
618   0x30, 0x7a,	/* move [...],mof */
619   0x7f, 0x0d,   /*  (dip [pc+]) */
620   0, 0, 0, 0,	/*  Replaced with address of .got + 8.  */
621   0x30, 0x09	/* jump [...] */
622 };
623 
624 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
625 {
626   0x84, 0xe2,	/* subq 4,$sp */
627   0x6f, 0xfe,	/* move.d 0,$acr */
628   0, 0, 0, 0,	/*  Replaced by address of .got + 4.  */
629   0x7e, 0x7a,	/* move $mof,[$sp] */
630   0x3f, 0x7a,	/* move [$acr],$mof */
631   0x04, 0xf2,	/* addq 4,acr */
632   0x6f, 0xfa,	/* move.d [$acr],$acr */
633   0xbf, 0x09,	/* jump $acr */
634   0xb0, 0x05,	/* nop */
635   0, 0		/*  Pad out to 26 bytes.  */
636 };
637 
638 /* Subsequent entries in an absolute procedure linkage table look like
639    this.  */
640 
641 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
642 {
643   0x7f, 0x0d,   /*  (dip [pc+]) */
644   0, 0, 0, 0,	/*  Replaced with address of this symbol in .got.  */
645   0x30, 0x09,	/* jump [...] */
646   0x3f,	 0x7e,	/* move [pc+],mof */
647   0, 0, 0, 0,	/*  Replaced with offset into relocation table.  */
648   0x2f, 0xfe,	/* add.d [pc+],pc */
649   0xec, 0xff,
650   0xff, 0xff	/*  Replaced with offset to start of .plt.  */
651 };
652 
653 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
654 {
655   0x6f, 0xfe,	/* move.d 0,$acr */
656   0, 0, 0, 0,	/*  Replaced with address of this symbol in .got.  */
657   0x6f, 0xfa,   /* move.d [$acr],$acr */
658   0xbf, 0x09,   /* jump $acr */
659   0xb0, 0x05,	/* nop */
660   0x3f, 0x7e,	/* move 0,mof */
661   0, 0, 0, 0,	/*  Replaced with offset into relocation table. */
662   0xbf, 0x0e,	/* ba start_of_plt0_entry */
663   0, 0, 0, 0,	/*  Replaced with offset to plt0 entry.  */
664   0xb0, 0x05	/* nop */
665 };
666 
667 /* The first entry in a PIC procedure linkage table looks like this.  */
668 
669 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
670 {
671   0xfc, 0xe1, 0x7e, 0x7e,	/* push mof */
672   0x04, 0x01, 0x30, 0x7a,	/* move [r0+4],mof */
673   0x08, 0x01, 0x30, 0x09,	/* jump [r0+8] */
674   0, 0, 0, 0, 0, 0, 0, 0,	/*  Pad out to 20 bytes.  */
675 };
676 
677 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
678 {
679   0x84, 0xe2,	/* subq 4,$sp */
680   0x04, 0x01,	/* addoq 4,$r0,$acr */
681   0x7e, 0x7a,	/* move $mof,[$sp] */
682   0x3f, 0x7a,	/* move [$acr],$mof */
683   0x04, 0xf2,	/* addq 4,$acr */
684   0x6f, 0xfa,	/* move.d [$acr],$acr */
685   0xbf, 0x09,	/* jump $acr */
686   0xb0, 0x05,	/* nop */
687   0, 0,		/*  Pad out to 26 bytes.  */
688   0, 0, 0, 0,
689   0, 0, 0, 0
690 };
691 
692 /* Subsequent entries in a PIC procedure linkage table look like this.  */
693 
694 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
695 {
696   0x6f, 0x0d,   /*  (bdap [pc+].d,r0) */
697   0, 0, 0, 0,	/*  Replaced with offset of this symbol in .got.  */
698   0x30, 0x09,	/* jump [...] */
699   0x3f, 0x7e,	/* move [pc+],mof */
700   0, 0, 0, 0,	/*  Replaced with offset into relocation table.  */
701   0x2f, 0xfe,	/* add.d [pc+],pc */
702   0xec, 0xff,	/*  Replaced with offset to start of .plt.  */
703   0xff, 0xff
704 };
705 
706 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
707 {
708   0x6f, 0x0d,	/* addo.d 0,$r0,$acr */
709   0, 0, 0, 0,	/*  Replaced with offset of this symbol in .got.  */
710   0x6f, 0xfa,	/* move.d [$acr],$acr */
711   0xbf, 0x09,	/* jump $acr */
712   0xb0, 0x05,	/* nop */
713   0x3f, 0x7e,	/* move relocoffs,$mof */
714   0, 0, 0, 0,	/*  Replaced with offset into relocation table.  */
715   0xbf, 0x0e,	/* ba start_of_plt */
716   0, 0, 0, 0,	/*  Replaced with offset to start of .plt.  */
717   0xb0, 0x05	/* nop */
718 };
719 
720 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
721    (and most other PIC/shlib stuff).  Check that we don't drift away
722    without reason.
723 
724    The CRIS linker, like the m68k and i386 linkers (and probably the rest
725    too) needs to keep track of the number of relocs that it decides to
726    copy in check_relocs for each symbol.  This is so that it can discard
727    PC relative relocs if it doesn't need them when linking with
728    -Bsymbolic.  We store the information in a field extending the regular
729    ELF linker hash table.  */
730 
731 /* This structure keeps track of the number of PC relative relocs we have
732    copied for a given symbol.  */
733 
734 struct elf_cris_pcrel_relocs_copied
735 {
736   /* Next section.  */
737   struct elf_cris_pcrel_relocs_copied *next;
738 
739   /* A section in dynobj.  */
740   asection *section;
741 
742   /* Number of relocs copied in this section.  */
743   bfd_size_type count;
744 
745   /* Example of reloc being copied, for message.  */
746   enum elf_cris_reloc_type r_type;
747 };
748 
749 /* CRIS ELF linker hash entry.  */
750 
751 struct elf_cris_link_hash_entry
752 {
753   struct elf_link_hash_entry root;
754 
755   /* Number of PC relative relocs copied for this symbol.  */
756   struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
757 
758   /* The GOTPLT references are CRIS-specific; the goal is to avoid having
759      both a general GOT and a PLT-specific GOT entry for the same symbol,
760      when it is referenced both as a function and as a function pointer.
761 
762      Number of GOTPLT references for a function.  */
763   bfd_signed_vma gotplt_refcount;
764 
765   /* Actual GOTPLT index for this symbol, if applicable, or zero if not
766      (zero is never used as an index).  FIXME: We should be able to fold
767      this with gotplt_refcount in a union, like the got and plt unions in
768      elf_link_hash_entry.  */
769   bfd_size_type gotplt_offset;
770 
771   /* The root.got.refcount is the sum of the regular reference counts
772      (this) and those members below.  We have to keep a separate count
773      to track when we've found the first (or last) reference to a
774      regular got entry.  The offset is in root.got.offset.  */
775   bfd_signed_vma reg_got_refcount;
776 
777   /* Similar to the above, the number of reloc references to this
778      symbols that need a R_CRIS_32_TPREL slot.  The offset is in
779      root.got.offset, because this and .dtp_refcount can't validly
780      happen when there's also a regular GOT entry; that's invalid
781      input for which an error is emitted.  */
782   bfd_signed_vma tprel_refcount;
783 
784   /* Similar to the above, the number of reloc references to this
785      symbols that need a R_CRIS_DTP slot.  The offset is in
786      root.got.offset; plus 4 if .tprel_refcount > 0.  */
787   bfd_signed_vma dtp_refcount;
788 };
789 
790 static bool
791 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *,
792 				      void * );
793 static bool
794 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *,
795 					  void *);
796 
797 /* The local_got_refcounts and local_got_offsets are a multiple of
798    LSNUM in size, namely LGOT_ALLOC_NELTS_FOR(LSNUM) (plus one for the
799    refcount for GOT itself, see code), with the summary / group offset
800    for local symbols located at offset N, reference counts for
801    ordinary (address) relocs at offset N + LSNUM, for R_CRIS_DTP
802    relocs at offset N + 2*LSNUM, and for R_CRIS_32_TPREL relocs at N +
803    3*LSNUM.  */
804 
805 #define LGOT_REG_NDX(x) ((x) + symtab_hdr->sh_info)
806 #define LGOT_DTP_NDX(x) ((x) + 2 * symtab_hdr->sh_info)
807 #define LGOT_TPREL_NDX(x) ((x) + 3 * symtab_hdr->sh_info)
808 #define LGOT_ALLOC_NELTS_FOR(x) ((x) * 4)
809 
810 /* CRIS ELF linker hash table.  */
811 
812 struct elf_cris_link_hash_table
813 {
814   struct elf_link_hash_table root;
815 
816   /* We can't use the PLT offset and calculate to get the GOTPLT offset,
817      since we try and avoid creating GOTPLT:s when there's already a GOT.
818      Instead, we keep and update the next available index here.  */
819   bfd_size_type next_gotplt_entry;
820 
821   /* The number of R_CRIS_32_DTPREL and R_CRIS_16_DTPREL that have
822      been seen for any input; if != 0, then the constant-offset
823      R_CRIS_DTPMOD is needed for this DSO/executable.  This turns
824      negative at relocation, so that we don't need an extra flag for
825      when the reloc is output.  */
826   bfd_signed_vma dtpmod_refcount;
827 };
828 
829 /* Traverse a CRIS ELF linker hash table.  */
830 
831 #define elf_cris_link_hash_traverse(table, func, info)			\
832   (elf_link_hash_traverse						\
833    (&(table)->root,							\
834     (bool (*) (struct elf_link_hash_entry *, void *)) (func),		\
835     (info)))
836 
837 /* Get the CRIS ELF linker hash table from a link_info structure.  */
838 
839 #define elf_cris_hash_table(p) \
840   ((is_elf_hash_table ((p)->hash)					\
841     && elf_hash_table_id (elf_hash_table (p)) == CRIS_ELF_DATA)		\
842    ? (struct elf_cris_link_hash_table *) (p)->hash : NULL)
843 
844 /* Get the CRIS ELF linker hash entry from a regular hash entry (the
845    "parent class").  The .root reference is just a simple type
846    check on the argument.  */
847 
848 #define elf_cris_hash_entry(p) \
849  ((struct elf_cris_link_hash_entry *) (&(p)->root))
850 
851 /* Create an entry in a CRIS ELF linker hash table.  */
852 
853 static struct bfd_hash_entry *
elf_cris_link_hash_newfunc(struct bfd_hash_entry * entry,struct bfd_hash_table * table,const char * string)854 elf_cris_link_hash_newfunc (struct bfd_hash_entry *entry,
855 			    struct bfd_hash_table *table,
856 			    const char *string)
857 {
858   struct elf_cris_link_hash_entry *ret =
859     (struct elf_cris_link_hash_entry *) entry;
860 
861   /* Allocate the structure if it has not already been allocated by a
862      subclass.  */
863   if (ret == (struct elf_cris_link_hash_entry *) NULL)
864     ret = ((struct elf_cris_link_hash_entry *)
865 	   bfd_hash_allocate (table,
866 			      sizeof (struct elf_cris_link_hash_entry)));
867   if (ret == (struct elf_cris_link_hash_entry *) NULL)
868     return (struct bfd_hash_entry *) ret;
869 
870   /* Call the allocation method of the superclass.  */
871   ret = ((struct elf_cris_link_hash_entry *)
872 	 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
873 				     table, string));
874   if (ret != (struct elf_cris_link_hash_entry *) NULL)
875     {
876       ret->pcrel_relocs_copied = NULL;
877       ret->gotplt_refcount = 0;
878       ret->gotplt_offset = 0;
879       ret->dtp_refcount = 0;
880       ret->tprel_refcount = 0;
881       ret->reg_got_refcount = 0;
882     }
883 
884   return (struct bfd_hash_entry *) ret;
885 }
886 
887 /* Create a CRIS ELF linker hash table.  */
888 
889 static struct bfd_link_hash_table *
elf_cris_link_hash_table_create(bfd * abfd)890 elf_cris_link_hash_table_create (bfd *abfd)
891 {
892   struct elf_cris_link_hash_table *ret;
893   size_t amt = sizeof (struct elf_cris_link_hash_table);
894 
895   ret = ((struct elf_cris_link_hash_table *) bfd_zmalloc (amt));
896   if (ret == (struct elf_cris_link_hash_table *) NULL)
897     return NULL;
898 
899   if (!_bfd_elf_link_hash_table_init (&ret->root, abfd,
900 				      elf_cris_link_hash_newfunc,
901 				      sizeof (struct elf_cris_link_hash_entry),
902 				      CRIS_ELF_DATA))
903     {
904       free (ret);
905       return NULL;
906     }
907 
908   /* Initialize to skip over the first three entries in the gotplt; they
909      are used for run-time symbol evaluation.  */
910   ret->next_gotplt_entry = 12;
911 
912   return &ret->root.root;
913 }
914 
915 /* Perform a single relocation.  By default we use the standard BFD
916    routines, with a few tweaks.  */
917 
918 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)919 cris_final_link_relocate (reloc_howto_type *  howto,
920 			  bfd *		      input_bfd,
921 			  asection *	      input_section,
922 			  bfd_byte *	      contents,
923 			  Elf_Internal_Rela * rel,
924 			  bfd_vma	      relocation)
925 {
926   bfd_reloc_status_type r;
927   enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rel->r_info);
928 
929   /* PC-relative relocations are relative to the position *after*
930      the reloc.  Note that for R_CRIS_8_PCREL the adjustment is
931      not a single byte, since PC must be 16-bit-aligned.  */
932   switch (r_type)
933     {
934       /* Check that the 16-bit GOT relocs are positive.  */
935     case R_CRIS_16_GOTPLT:
936     case R_CRIS_16_GOT:
937       if ((bfd_signed_vma) relocation < 0)
938 	return bfd_reloc_overflow;
939       break;
940 
941     case R_CRIS_32_PLT_PCREL:
942     case R_CRIS_32_PCREL:
943       relocation -= 2;
944       /* Fall through.  */
945     case R_CRIS_8_PCREL:
946     case R_CRIS_16_PCREL:
947       relocation -= 2;
948       break;
949 
950     default:
951       break;
952     }
953 
954   r = _bfd_final_link_relocate (howto, input_bfd, input_section,
955 				contents, rel->r_offset,
956 				relocation, rel->r_addend);
957   return r;
958 }
959 
960 
961 /* The number of errors left before we stop outputting reloc-specific
962    explanatory messages.  By coincidence, this works nicely together
963    with the default number of messages you'll get from LD about
964    "relocation truncated to fit" messages before you get an
965    "additional relocation overflows omitted from the output".  */
966 static int additional_relocation_error_msg_count = 10;
967 
968 /* Relocate an CRIS ELF section.  See elf32-fr30.c, from where this was
969    copied, for further comments.  */
970 
971 static int
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)972 cris_elf_relocate_section (bfd *output_bfd ATTRIBUTE_UNUSED,
973 			   struct bfd_link_info *info,
974 			   bfd *input_bfd,
975 			   asection *input_section,
976 			   bfd_byte *contents,
977 			   Elf_Internal_Rela *relocs,
978 			   Elf_Internal_Sym *local_syms,
979 			   asection **local_sections)
980 {
981   struct elf_cris_link_hash_table * htab;
982   bfd *dynobj;
983   Elf_Internal_Shdr *symtab_hdr;
984   struct elf_link_hash_entry **sym_hashes;
985   bfd_vma *local_got_offsets;
986   asection *sgot;
987   asection *splt;
988   asection *sreloc;
989   Elf_Internal_Rela *rel;
990   Elf_Internal_Rela *relend;
991   asection *srelgot;
992 
993   htab = elf_cris_hash_table (info);
994   if (htab == NULL)
995     return false;
996 
997   dynobj = htab->root.dynobj;
998   local_got_offsets = elf_local_got_offsets (input_bfd);
999   symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
1000   sym_hashes = elf_sym_hashes (input_bfd);
1001   relend     = relocs + input_section->reloc_count;
1002 
1003   sgot = NULL;
1004   splt = NULL;
1005   sreloc = NULL;
1006   srelgot = NULL;
1007 
1008   if (dynobj != NULL)
1009     {
1010       splt = htab->root.splt;
1011       sgot = htab->root.sgot;
1012     }
1013 
1014   for (rel = relocs; rel < relend; rel ++)
1015     {
1016       reloc_howto_type *howto;
1017       unsigned long r_symndx;
1018       Elf_Internal_Sym *sym;
1019       asection *sec;
1020       struct elf_link_hash_entry *h;
1021       bfd_vma relocation;
1022       bfd_reloc_status_type r;
1023       const char *symname = NULL;
1024       enum elf_cris_reloc_type r_type;
1025       bool resolved_to_zero;
1026 
1027       r_type = ELF32_R_TYPE (rel->r_info);
1028 
1029       if (   r_type == R_CRIS_GNU_VTINHERIT
1030 	  || r_type == R_CRIS_GNU_VTENTRY)
1031 	continue;
1032 
1033       r_symndx = ELF32_R_SYM (rel->r_info);
1034       howto  = cris_elf_howto_table + r_type;
1035       h      = NULL;
1036       sym    = NULL;
1037       sec    = NULL;
1038 
1039       if (r_symndx < symtab_hdr->sh_info)
1040 	{
1041 	  sym = local_syms + r_symndx;
1042 	  sec = local_sections [r_symndx];
1043 	  relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
1044 
1045 	  symname = (bfd_elf_string_from_elf_section
1046 		     (input_bfd, symtab_hdr->sh_link, sym->st_name));
1047 	  if (symname == NULL)
1048 	    symname = bfd_section_name (sec);
1049 	}
1050       else
1051 	{
1052 	  bool warned, ignored;
1053 	  bool unresolved_reloc;
1054 
1055 	  RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
1056 				   r_symndx, symtab_hdr, sym_hashes,
1057 				   h, sec, relocation,
1058 				   unresolved_reloc, warned, ignored);
1059 
1060 	  symname = h->root.root.string;
1061 
1062 	  if (unresolved_reloc
1063 	      /* Perhaps we should detect the cases that
1064 		 sec->output_section is expected to be NULL like i386 and
1065 		 m68k, but apparently (and according to elfxx-ia64.c) all
1066 		 valid cases are where the symbol is defined in a shared
1067 		 object which we link dynamically against.  This includes
1068 		 PLT relocs for which we've created a PLT entry and other
1069 		 relocs for which we're prepared to create dynamic
1070 		 relocations.
1071 
1072 		 For now, new situations cause us to just err when
1073 		 sec->output_offset is NULL but the object with the symbol
1074 		 is *not* dynamically linked against.  Thus this will
1075 		 automatically remind us so we can see if there are other
1076 		 valid cases we need to revisit.  */
1077 	      && (sec->owner->flags & DYNAMIC) != 0)
1078 	    relocation = 0;
1079 
1080 	  else if (h->root.type == bfd_link_hash_defined
1081 		   || h->root.type == bfd_link_hash_defweak)
1082 	    {
1083 	      /* Here follow the cases where the relocation value must
1084 		 be zero (or when further handling is simplified when
1085 		 zero).  I can't claim to understand the various
1086 		 conditions and they weren't described in the files
1087 		 where I copied them from (elf32-m68k.c and
1088 		 elf32-i386.c), but let's mention examples of where
1089 		 they happen.  FIXME: Perhaps define and use a
1090 		 dynamic_symbol_p function like ia64.
1091 
1092 		 - When creating a shared library, we can have an
1093 		 ordinary relocation for a symbol defined in a shared
1094 		 library (perhaps the one we create).  We then make
1095 		 the relocation value zero, as the value seen now will
1096 		 be added into the relocation addend in this shared
1097 		 library, but must be handled only at dynamic-link
1098 		 time.  FIXME: Not sure this example covers the
1099 		 h->elf_link_hash_flags test, though it's there in
1100 		 other targets.  */
1101 	      if (bfd_link_pic (info)
1102 		  && ((!SYMBOLIC_BIND (info, h) && h->dynindx != -1)
1103 		      || !h->def_regular)
1104 		  && (input_section->flags & SEC_ALLOC) != 0
1105 		  && (r_type == R_CRIS_8
1106 		      || r_type == R_CRIS_16
1107 		      || r_type == R_CRIS_32
1108 		      || r_type == R_CRIS_8_PCREL
1109 		      || r_type == R_CRIS_16_PCREL
1110 		      || r_type == R_CRIS_32_PCREL))
1111 		relocation = 0;
1112 	      else if (!bfd_link_relocatable (info) && unresolved_reloc
1113 		       && (_bfd_elf_section_offset (output_bfd, info,
1114 						    input_section,
1115 						    rel->r_offset)
1116 			   != (bfd_vma) -1))
1117 		{
1118 		  _bfd_error_handler
1119 		    /* xgettext:c-format */
1120 		    (_("%pB, section %pA: unresolvable relocation %s against symbol `%s'"),
1121 		     input_bfd,
1122 		     input_section,
1123 		     cris_elf_howto_table[r_type].name,
1124 		     symname);
1125 		  bfd_set_error (bfd_error_bad_value);
1126 		  return false;
1127 		}
1128 	    }
1129 	}
1130 
1131       if (sec != NULL && discarded_section (sec))
1132 	RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
1133 					 rel, 1, relend, howto, 0, contents);
1134 
1135       if (bfd_link_relocatable (info))
1136 	continue;
1137 
1138       resolved_to_zero = (h != NULL
1139 			  && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
1140 
1141       switch (r_type)
1142 	{
1143 	case R_CRIS_16_GOTPLT:
1144 	case R_CRIS_32_GOTPLT:
1145 	  /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1146 	     but we require a PLT, and the PLT handling will take care of
1147 	     filling in the PLT-specific GOT entry.  For the GOT offset,
1148 	     calculate it as we do when filling it in for the .got.plt
1149 	     section.  If we don't have a PLT, punt to GOT handling.  */
1150 	  if (h != NULL
1151 	      && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1152 	    {
1153 	      asection *sgotplt = htab->root.sgotplt;
1154 	      bfd_vma got_offset;
1155 
1156 	      BFD_ASSERT (h->dynindx != -1);
1157 	      BFD_ASSERT (sgotplt != NULL);
1158 
1159 	      got_offset
1160 		= ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1161 
1162 	      relocation = got_offset;
1163 	      break;
1164 	    }
1165 
1166 	  /* We didn't make a PLT entry for this symbol.  Maybe everything is
1167 	     folded into the GOT.  Other than folding, this happens when
1168 	     statically linking PIC code, or when using -Bsymbolic.  Check
1169 	     that we instead have a GOT entry as done for us by
1170 	     elf_cris_adjust_dynamic_symbol, and drop through into the
1171 	     ordinary GOT cases.  This must not happen for the
1172 	     executable, because any reference it does to a function
1173 	     that is satisfied by a DSO must generate a PLT.  We assume
1174 	     these call-specific relocs don't address non-functions.  */
1175 	  if (h != NULL
1176 	      && (h->got.offset == (bfd_vma) -1
1177 		  || (!bfd_link_pic (info)
1178 		      && !(h->def_regular
1179 			   || (!h->def_dynamic
1180 			       && h->root.type == bfd_link_hash_undefweak)))))
1181 	    {
1182 	      _bfd_error_handler
1183 		((h->got.offset == (bfd_vma) -1)
1184 		 /* xgettext:c-format */
1185 		 ? _("%pB, section %pA: no PLT nor GOT for relocation %s"
1186 		     " against symbol `%s'")
1187 		 /* xgettext:c-format */
1188 		 : _("%pB, section %pA: no PLT for relocation %s"
1189 		     " against symbol `%s'"),
1190 		 input_bfd,
1191 		 input_section,
1192 		 cris_elf_howto_table[r_type].name,
1193 		 (symname != NULL && symname[0] != '\0'
1194 		  ? symname : _("[whose name is lost]")));
1195 
1196 	      /* FIXME: Perhaps blaming input is not the right thing to
1197 		 do; this is probably an internal error.  But it is true
1198 		 that we didn't like that particular input.  */
1199 	      bfd_set_error (bfd_error_bad_value);
1200 	      return false;
1201 	    }
1202 	  /* Fall through.  */
1203 
1204 	  /* The size of the actual relocation is not used here; we only
1205 	     fill in the GOT table here.  */
1206 	case R_CRIS_16_GOT:
1207 	case R_CRIS_32_GOT:
1208 	  {
1209 	    bfd_vma off;
1210 
1211 	    /* Note that despite using RELA relocations, the .got contents
1212 	       is always filled in with the link-relative relocation
1213 	       value; the addend.  */
1214 
1215 	    if (h != NULL)
1216 	      {
1217 		off = h->got.offset;
1218 		BFD_ASSERT (off != (bfd_vma) -1);
1219 
1220 		if (!elf_hash_table (info)->dynamic_sections_created
1221 		    || (! bfd_link_pic (info)
1222 			&& (h->def_regular
1223 			    || h->type == STT_FUNC
1224 			    || h->needs_plt))
1225 		    || (bfd_link_pic (info)
1226 			&& (SYMBOLIC_BIND (info, h) || h->dynindx == -1)
1227 			&& h->def_regular))
1228 		  {
1229 		    /* This wasn't checked above for ! bfd_link_pic (info), but
1230 		       must hold there if we get here; the symbol must
1231 		       be defined in the regular program or be undefweak
1232 		       or be a function or otherwise need a PLT.  */
1233 		    BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1234 				|| bfd_link_pic (info)
1235 				|| h->def_regular
1236 				|| h->type == STT_FUNC
1237 				|| h->needs_plt
1238 				|| h->root.type == bfd_link_hash_undefweak);
1239 
1240 		    /* This is actually a static link, or it is a
1241 		       -Bsymbolic link and the symbol is defined locally,
1242 		       or is undefweak, or the symbol was forced to be
1243 		       local because of a version file, or we're not
1244 		       creating a dynamic object.  We must initialize this
1245 		       entry in the global offset table.  Since the offset
1246 		       must always be a multiple of 4, we use the least
1247 		       significant bit to record whether we have
1248 		       initialized it already.
1249 
1250 		       If this GOT entry should be runtime-initialized, we
1251 		       will create a .rela.got relocation entry to
1252 		       initialize the value.  This is done in the
1253 		       finish_dynamic_symbol routine.  */
1254 		    if ((off & 1) != 0)
1255 		      off &= ~1;
1256 		    else
1257 		      {
1258 			bfd_put_32 (output_bfd, relocation,
1259 				    sgot->contents + off);
1260 			h->got.offset |= 1;
1261 		      }
1262 		  }
1263 	      }
1264 	    else
1265 	      {
1266 		BFD_ASSERT (local_got_offsets != NULL
1267 			    && local_got_offsets[r_symndx] != (bfd_vma) -1);
1268 
1269 		off = local_got_offsets[r_symndx];
1270 
1271 		/* The offset must always be a multiple of 4.  We use
1272 		   the least significant bit to record whether we have
1273 		   already generated the necessary reloc.  */
1274 		if ((off & 1) != 0)
1275 		  off &= ~1;
1276 		else
1277 		  {
1278 		    bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1279 
1280 		    if (bfd_link_pic (info))
1281 		      {
1282 			Elf_Internal_Rela outrel;
1283 			bfd_byte *loc;
1284 
1285 			srelgot = htab->root.srelgot;
1286 			BFD_ASSERT (srelgot != NULL);
1287 
1288 			outrel.r_offset = (sgot->output_section->vma
1289 					   + sgot->output_offset
1290 					   + off);
1291 			outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1292 			outrel.r_addend = relocation;
1293 			loc = srelgot->contents;
1294 			loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1295 			bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1296 		      }
1297 
1298 		    local_got_offsets[r_symndx] |= 1;
1299 		  }
1300 	      }
1301 
1302 	    relocation = sgot->output_offset + off;
1303 	    if (rel->r_addend != 0)
1304 	      {
1305 		/* We can't do anything for a relocation which is against
1306 		   a symbol *plus offset*.  GOT holds relocations for
1307 		   symbols.  Make this an error; the compiler isn't
1308 		   allowed to pass us these kinds of things.  */
1309 		if (h == NULL)
1310 		  _bfd_error_handler
1311 		    /* xgettext:c-format */
1312 		    (_("%pB, section %pA: relocation %s with non-zero addend"
1313 		       " %" PRId64 " against local symbol"),
1314 		     input_bfd,
1315 		     input_section,
1316 		     cris_elf_howto_table[r_type].name,
1317 		     (int64_t) rel->r_addend);
1318 		else
1319 		  _bfd_error_handler
1320 		    /* xgettext:c-format */
1321 		    (_("%pB, section %pA: relocation %s with non-zero addend"
1322 		       " %" PRId64 " against symbol `%s'"),
1323 		     input_bfd,
1324 		     input_section,
1325 		     cris_elf_howto_table[r_type].name,
1326 		     (int64_t) rel->r_addend,
1327 		     symname[0] != '\0' ? symname : _("[whose name is lost]"));
1328 
1329 		bfd_set_error (bfd_error_bad_value);
1330 		return false;
1331 	      }
1332 	  }
1333 	  break;
1334 
1335 	case R_CRIS_32_GOTREL:
1336 	  /* This relocation must only be performed against local symbols.
1337 	     It's also ok when we link a program and the symbol is either
1338 	     defined in an ordinary (non-DSO) object or is undefined weak.  */
1339 	  if (h != NULL
1340 	      && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1341 	      && !(!bfd_link_pic (info)
1342 		   && (h->def_regular
1343 		       || (!h->def_dynamic
1344 			   && h->root.type == bfd_link_hash_undefweak))))
1345 	    {
1346 	      _bfd_error_handler
1347 		/* xgettext:c-format */
1348 		(_("%pB, section %pA: relocation %s is"
1349 		   " not allowed for global symbol: `%s'"),
1350 		 input_bfd,
1351 		 input_section,
1352 		 cris_elf_howto_table[r_type].name,
1353 		 symname);
1354 	      bfd_set_error (bfd_error_bad_value);
1355 	      return false;
1356 	    }
1357 
1358 	  /* This can happen if we get a link error with the input ELF
1359 	     variant mismatching the output variant.  Emit an error so
1360 	     it's noticed if it happens elsewhere.  */
1361 	  if (sgot == NULL)
1362 	    {
1363 	      _bfd_error_handler
1364 		/* xgettext:c-format */
1365 		(_("%pB, section %pA: relocation %s with no GOT created"),
1366 		 input_bfd,
1367 		 input_section,
1368 		 cris_elf_howto_table[r_type].name);
1369 	      bfd_set_error (bfd_error_bad_value);
1370 	      return false;
1371 	    }
1372 
1373 	  /* This relocation is like a PC-relative one, except the
1374 	     reference point is the location of GOT.  Note that
1375 	     sgot->output_offset is not involved in this calculation.  We
1376 	     always want the start of entire .got section, not the
1377 	     position after the reserved header.  */
1378 	  relocation -= sgot->output_section->vma;
1379 	  break;
1380 
1381 	case R_CRIS_32_PLT_PCREL:
1382 	  /* Relocation is to the entry for this symbol in the
1383 	     procedure linkage table.  */
1384 
1385 	  /* Resolve a PLT_PCREL reloc against a local symbol directly,
1386 	     without using the procedure linkage table.  */
1387 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1388 	    break;
1389 
1390 	  if (h->plt.offset == (bfd_vma) -1
1391 	      || splt == NULL)
1392 	    {
1393 	      /* We didn't make a PLT entry for this symbol.  This
1394 		 happens when statically linking PIC code, or when
1395 		 using -Bsymbolic.  */
1396 	      break;
1397 	    }
1398 
1399 	  relocation = (splt->output_section->vma
1400 			+ splt->output_offset
1401 			+ h->plt.offset);
1402 	  break;
1403 
1404 	case R_CRIS_32_PLT_GOTREL:
1405 	  /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1406 	     start of the .got section.  See also comment at
1407 	     R_CRIS_32_GOT.  */
1408 	  relocation -= sgot->output_section->vma;
1409 
1410 	  /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1411 	     without using the procedure linkage table.  */
1412 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1413 	    break;
1414 
1415 	  if (h->plt.offset == (bfd_vma) -1
1416 	      || splt == NULL)
1417 	    {
1418 	      /* We didn't make a PLT entry for this symbol.  This
1419 		 happens when statically linking PIC code, or when
1420 		 using -Bsymbolic.  */
1421 	      break;
1422 	    }
1423 
1424 	  relocation = (splt->output_section->vma
1425 			+ splt->output_offset
1426 			+ h->plt.offset
1427 			- sgot->output_section->vma);
1428 	  break;
1429 
1430 	case R_CRIS_8_PCREL:
1431 	case R_CRIS_16_PCREL:
1432 	case R_CRIS_32_PCREL:
1433 	  /* If the symbol was local, we need no shlib-specific handling.  */
1434 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1435 	      || h->dynindx == -1)
1436 	    break;
1437 
1438 	  /* Fall through.  */
1439 	case R_CRIS_8:
1440 	case R_CRIS_16:
1441 	case R_CRIS_32:
1442 	  if (bfd_link_pic (info)
1443 	      && !resolved_to_zero
1444 	      && r_symndx != STN_UNDEF
1445 	      && (input_section->flags & SEC_ALLOC) != 0
1446 	      && ((r_type != R_CRIS_8_PCREL
1447 		   && r_type != R_CRIS_16_PCREL
1448 		   && r_type != R_CRIS_32_PCREL)
1449 		  || (!SYMBOLIC_BIND (info, h)
1450 		      || (h != NULL && !h->def_regular))))
1451 	    {
1452 	      Elf_Internal_Rela outrel;
1453 	      bfd_byte *loc;
1454 	      bool skip, relocate;
1455 
1456 	      /* When generating a shared object, these relocations
1457 		 are copied into the output file to be resolved at run
1458 		 time.  */
1459 
1460 	      if (sreloc == NULL)
1461 		{
1462 		  sreloc = _bfd_elf_get_dynamic_reloc_section
1463 		    (dynobj, input_section, /*rela?*/ true);
1464 		  /* The section should have been created in cris_elf_check_relocs,
1465 		     but that function will not be called for objects which fail in
1466 		     cris_elf_merge_private_bfd_data.  */
1467 		  if (sreloc == NULL)
1468 		    {
1469 		      bfd_set_error (bfd_error_bad_value);
1470 		      return false;
1471 		    }
1472 		}
1473 
1474 	      skip = false;
1475 	      relocate = false;
1476 
1477 	      outrel.r_offset =
1478 		_bfd_elf_section_offset (output_bfd, info, input_section,
1479 					 rel->r_offset);
1480 	      if (outrel.r_offset == (bfd_vma) -1)
1481 		skip = true;
1482 	      else if (outrel.r_offset == (bfd_vma) -2
1483 		       /* For now, undefined weak symbols with non-default
1484 			  visibility (yielding 0), like exception info for
1485 			  discarded sections, will get a R_CRIS_NONE
1486 			  relocation rather than no relocation, because we
1487 			  notice too late that the symbol doesn't need a
1488 			  relocation.  */
1489 		       || (h != NULL
1490 			   && h->root.type == bfd_link_hash_undefweak
1491 			   && ELF_ST_VISIBILITY (h->other) != STV_DEFAULT))
1492 		skip = true, relocate = true;
1493 	      outrel.r_offset += (input_section->output_section->vma
1494 				  + input_section->output_offset);
1495 
1496 	      if (skip)
1497 		memset (&outrel, 0, sizeof outrel);
1498 	      /* h->dynindx may be -1 if the symbol was marked to
1499 		 become local.  */
1500 	      else if (h != NULL
1501 		       && ((!SYMBOLIC_BIND (info, h) && h->dynindx != -1)
1502 			   || !h->def_regular))
1503 		{
1504 		  BFD_ASSERT (h->dynindx != -1);
1505 		  outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1506 		  outrel.r_addend = relocation + rel->r_addend;
1507 		}
1508 	      else
1509 		{
1510 		  outrel.r_addend = relocation + rel->r_addend;
1511 
1512 		  if (r_type == R_CRIS_32)
1513 		    {
1514 		      relocate = true;
1515 		      outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1516 		    }
1517 		  else
1518 		    {
1519 		      long indx;
1520 
1521 		      if (bfd_is_abs_section (sec))
1522 			indx = 0;
1523 		      else if (sec == NULL || sec->owner == NULL)
1524 			{
1525 			  bfd_set_error (bfd_error_bad_value);
1526 			  return false;
1527 			}
1528 		      else
1529 			{
1530 			  asection *osec;
1531 
1532 			  /* We are turning this relocation into one
1533 			     against a section symbol.  It would be
1534 			     proper to subtract the symbol's value,
1535 			     osec->vma, from the emitted reloc addend,
1536 			     but ld.so expects buggy relocs.  */
1537 			  osec = sec->output_section;
1538 			  indx = elf_section_data (osec)->dynindx;
1539 			  if (indx == 0)
1540 			    {
1541 			      osec = htab->root.text_index_section;
1542 			      indx = elf_section_data (osec)->dynindx;
1543 			    }
1544 			  BFD_ASSERT (indx != 0);
1545 			}
1546 
1547 		      outrel.r_info = ELF32_R_INFO (indx, r_type);
1548 		    }
1549 		}
1550 
1551 	      loc = sreloc->contents;
1552 	      loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1553 	      bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1554 
1555 	      /* This reloc will be computed at runtime, so there's no
1556 		 need to do anything now, except for R_CRIS_32 relocations
1557 		 that have been turned into R_CRIS_RELATIVE.  */
1558 	      if (!relocate)
1559 		continue;
1560 	    }
1561 
1562 	  break;
1563 
1564 	case R_CRIS_16_DTPREL:
1565 	case R_CRIS_32_DTPREL:
1566 	  /* This relocation must only be performed against local
1567 	     symbols, or to sections that are not loadable.  It's also
1568 	     ok when we link a program and the symbol is defined in an
1569 	     ordinary (non-DSO) object (if it's undefined there, we've
1570 	     already seen an error).  */
1571 	  if (h != NULL
1572 	      && (input_section->flags & SEC_ALLOC) != 0
1573 	      && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1574 	      && (bfd_link_pic (info)
1575 		  || (!h->def_regular
1576 		      && h->root.type != bfd_link_hash_undefined)))
1577 	    {
1578 	      _bfd_error_handler
1579 		((h->root.type == bfd_link_hash_undefined)
1580 		 /* We shouldn't get here for GCC-emitted code.  */
1581 		 /* xgettext:c-format */
1582 		 ? _("%pB, section %pA: relocation %s has an undefined"
1583 		     " reference to `%s', perhaps a declaration mixup?")
1584 		 /* xgettext:c-format */
1585 		 : _("%pB, section %pA: relocation %s is"
1586 		     " not allowed for `%s', a global symbol with default"
1587 		     " visibility, perhaps a declaration mixup?"),
1588 		 input_bfd,
1589 		 input_section,
1590 		 cris_elf_howto_table[r_type].name,
1591 		 symname != NULL && symname[0] != '\0'
1592 		 ? symname : _("[whose name is lost]"));
1593 	      bfd_set_error (bfd_error_bad_value);
1594 	      return false;
1595 	    }
1596 
1597 	  BFD_ASSERT ((input_section->flags & SEC_ALLOC) == 0
1598 		      || htab->dtpmod_refcount != 0);
1599 
1600 	  /* Fill in a R_CRIS_DTPMOD reloc at offset 3 if we haven't
1601 	     already done so.  Note that we do this in .got.plt, not
1602 	     in .got, as .got.plt contains the first part, still the
1603 	     reloc is against .got, because the linker script directs
1604 	     (is required to direct) them both into .got.  */
1605 	  if (htab->dtpmod_refcount > 0
1606 	      && (input_section->flags & SEC_ALLOC) != 0)
1607 	    {
1608 	      asection *sgotplt = htab->root.sgotplt;
1609 	      BFD_ASSERT (sgotplt != NULL);
1610 
1611 	      if (bfd_link_pic (info))
1612 		{
1613 		  Elf_Internal_Rela outrel;
1614 		  bfd_byte *loc;
1615 
1616 		  srelgot = htab->root.srelgot;
1617 		  BFD_ASSERT (srelgot != NULL);
1618 		  loc = srelgot->contents;
1619 		  loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1620 
1621 		  bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 12);
1622 		  bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1623 		  outrel.r_offset = (sgotplt->output_section->vma
1624 				     + sgotplt->output_offset
1625 				     + 12);
1626 		  outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTPMOD);
1627 		  outrel.r_addend = 0;
1628 		  bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1629 		}
1630 	      else
1631 		{
1632 		  /* For an executable, the GOT entry contents is known.  */
1633 		  bfd_put_32 (output_bfd, (bfd_vma) 1, sgotplt->contents + 12);
1634 		  bfd_put_32 (output_bfd, (bfd_vma) 0, sgotplt->contents + 16);
1635 		}
1636 
1637 	      /* Reverse the sign to mark that we've emitted the
1638 		 required GOT entry.  */
1639 	      htab->dtpmod_refcount = - htab->dtpmod_refcount;
1640 	    }
1641 
1642 	  /* The relocation is the offset from the start of the module
1643 	     TLS block to the (local) symbol.  */
1644 	  relocation -= elf_hash_table (info)->tls_sec == NULL
1645 	    ? 0 : elf_hash_table (info)->tls_sec->vma;
1646 	  break;
1647 
1648 	case R_CRIS_32_GD:
1649 	  if (bfd_link_pic (info))
1650 	    {
1651 	      bfd_set_error (bfd_error_invalid_operation);
1652 
1653 	      /* We've already informed in cris_elf_check_relocs that
1654 		 this is an error.  */
1655 	      return false;
1656 	    }
1657 	  /* Fall through.  */
1658 
1659 	case R_CRIS_16_GOT_GD:
1660 	case R_CRIS_32_GOT_GD:
1661 	  if (rel->r_addend != 0)
1662 	    {
1663 	      /* We can't do anything for a relocation which is against a
1664 		 symbol *plus offset*.  The GOT holds relocations for
1665 		 symbols.  Make this an error; the compiler isn't allowed
1666 		 to pass us these kinds of things.  */
1667 	      _bfd_error_handler
1668 		/* xgettext:c-format */
1669 		(_("%pB, section %pA: relocation %s with non-zero addend"
1670 		   " %" PRId64 " against symbol `%s'"),
1671 		 input_bfd,
1672 		 input_section,
1673 		 cris_elf_howto_table[r_type].name,
1674 		 (int64_t) rel->r_addend,
1675 		 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1676 
1677 	      bfd_set_error (bfd_error_bad_value);
1678 	      return false;
1679 	    }
1680 
1681 	  if (!bfd_link_pic (info)
1682 	      && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1683 	    {
1684 	      /* Known contents of the GOT.  */
1685 	      bfd_vma off;
1686 
1687 	      /* The symbol is defined in the program, so just write
1688 		 (1, known_tpoffset) into the GOT.  */
1689 	      relocation -= elf_hash_table (info)->tls_sec->vma;
1690 
1691 	      if (h != NULL)
1692 		{
1693 		  off = elf_cris_hash_entry (h)->tprel_refcount > 0
1694 		    ? h->got.offset + 4 : h->got.offset;
1695 		}
1696 	      else
1697 		{
1698 		  off = local_got_offsets[r_symndx];
1699 		  if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1700 		    off += 4;
1701 		}
1702 
1703 	      /* We use bit 1 of the offset as a flag for GOT entry with
1704 		 the R_CRIS_DTP reloc, setting it when we've emitted the
1705 		 GOT entry and reloc.  Bit 0 is used for R_CRIS_32_TPREL
1706 		 relocs.  */
1707 	      if ((off & 2) == 0)
1708 		{
1709 		  off &= ~3;
1710 
1711 		  if (h != NULL)
1712 		    h->got.offset |= 2;
1713 		  else
1714 		    local_got_offsets[r_symndx] |= 2;
1715 
1716 		  bfd_put_32 (output_bfd, 1, sgot->contents + off);
1717 		  bfd_put_32 (output_bfd, relocation, sgot->contents + off + 4);
1718 		}
1719 	      else
1720 		off &= ~3;
1721 
1722 	      relocation = sgot->output_offset + off
1723 		+ (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1724 	    }
1725 	  else
1726 	    {
1727 	      /* Not all parts of the GOT entry are known; emit a real
1728 		 relocation.  */
1729 	      bfd_vma off;
1730 
1731 	      if (h != NULL)
1732 		off = elf_cris_hash_entry (h)->tprel_refcount > 0
1733 		  ? h->got.offset + 4 : h->got.offset;
1734 	      else
1735 		{
1736 		  off = local_got_offsets[r_symndx];
1737 		  if (local_got_offsets[LGOT_TPREL_NDX (r_symndx)])
1738 		    off += 4;
1739 		}
1740 
1741 	      /* See above re bit 1 and bit 0 usage.  */
1742 	      if ((off & 2) == 0)
1743 		{
1744 		  Elf_Internal_Rela outrel;
1745 		  bfd_byte *loc;
1746 
1747 		  off &= ~3;
1748 
1749 		  if (h != NULL)
1750 		    h->got.offset |= 2;
1751 		  else
1752 		    local_got_offsets[r_symndx] |= 2;
1753 
1754 		  /* Clear the target contents of the GOT (just as a
1755 		     gesture; it's already cleared on allocation): this
1756 		     relocation is not like the other dynrelocs.  */
1757 		  bfd_put_32 (output_bfd, 0, sgot->contents + off);
1758 		  bfd_put_32 (output_bfd, 0, sgot->contents + off + 4);
1759 
1760 		  srelgot = htab->root.srelgot;
1761 		  BFD_ASSERT (srelgot != NULL);
1762 
1763 		  if (h != NULL && h->dynindx != -1)
1764 		    {
1765 		      outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_DTP);
1766 		      relocation = 0;
1767 		    }
1768 		  else
1769 		    {
1770 		      outrel.r_info = ELF32_R_INFO (0, R_CRIS_DTP);
1771 
1772 		      /* NULL if we had an error.  */
1773 		      relocation -= elf_hash_table (info)->tls_sec == NULL
1774 			? 0 : elf_hash_table (info)->tls_sec->vma;
1775 		    }
1776 
1777 		  outrel.r_offset = (sgot->output_section->vma
1778 				     + sgot->output_offset
1779 				     + off);
1780 		  outrel.r_addend = relocation;
1781 		  loc = srelgot->contents;
1782 		  loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1783 
1784 		  /* NULL if we had an error.  */
1785 		  if (srelgot->contents != NULL)
1786 		    bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1787 		}
1788 	      else
1789 		off &= ~3;
1790 
1791 	      relocation = sgot->output_offset + off
1792 		+ (r_type == R_CRIS_32_GD ? sgot->output_section->vma : 0);
1793 	    }
1794 
1795 	  /* The GOT-relative offset to the GOT entry is the
1796 	     relocation, or for R_CRIS_32_GD, the actual address of
1797 	     the GOT entry.  */
1798 	  break;
1799 
1800 	case R_CRIS_32_IE:
1801 	  if (bfd_link_pic (info))
1802 	    {
1803 	      bfd_set_error (bfd_error_invalid_operation);
1804 
1805 	      /* We've already informed in cris_elf_check_relocs that
1806 		 this is an error.  */
1807 	      return false;
1808 	    }
1809 	  /* Fall through.  */
1810 
1811 	case R_CRIS_32_GOT_TPREL:
1812 	case R_CRIS_16_GOT_TPREL:
1813 	  if (rel->r_addend != 0)
1814 	    {
1815 	      /* We can't do anything for a relocation which is
1816 		 against a symbol *plus offset*.  GOT holds
1817 		 relocations for symbols.  Make this an error; the
1818 		 compiler isn't allowed to pass us these kinds of
1819 		 things.  */
1820 	      _bfd_error_handler
1821 		/* xgettext:c-format */
1822 		(_("%pB, section %pA: relocation %s with non-zero addend"
1823 		   " %" PRId64 " against symbol `%s'"),
1824 		 input_bfd,
1825 		 input_section,
1826 		 cris_elf_howto_table[r_type].name,
1827 		 (int64_t) rel->r_addend,
1828 		 symname[0] != '\0' ? symname : _("[whose name is lost]"));
1829 	      bfd_set_error (bfd_error_bad_value);
1830 	      return false;
1831 	    }
1832 
1833 	  if (!bfd_link_pic (info)
1834 	      && (h == NULL || h->def_regular || ELF_COMMON_DEF_P (h)))
1835 	    {
1836 	      /* Known contents of the GOT.  */
1837 	      bfd_vma off;
1838 
1839 	      /* The symbol is defined in the program, so just write
1840 		 the -prog_tls_size+known_tpoffset into the GOT.  */
1841 	      relocation -= elf_hash_table (info)->tls_sec->vma;
1842 	      relocation -= elf_hash_table (info)->tls_size;
1843 
1844 	      if (h != NULL)
1845 		off = h->got.offset;
1846 	      else
1847 		off = local_got_offsets[r_symndx];
1848 
1849 	      /* Bit 0 is used to mark whether we've emitted the required
1850 		 entry (and if needed R_CRIS_32_TPREL reloc).  Bit 1
1851 		 is used similarly for R_CRIS_DTP, see above.  */
1852 	      if ((off & 1) == 0)
1853 		{
1854 		  off &= ~3;
1855 
1856 		  if (h != NULL)
1857 		    h->got.offset |= 1;
1858 		  else
1859 		    local_got_offsets[r_symndx] |= 1;
1860 
1861 		  bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1862 		}
1863 	      else
1864 		off &= ~3;
1865 
1866 	      relocation = sgot->output_offset + off
1867 		+ (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1868 	    }
1869 	  else
1870 	    {
1871 	      /* Emit a real relocation.  */
1872 	      bfd_vma off;
1873 
1874 	      if (h != NULL)
1875 		off = h->got.offset;
1876 	      else
1877 		off = local_got_offsets[r_symndx];
1878 
1879 	      /* See above re usage of bit 0 and 1.  */
1880 	      if ((off & 1) == 0)
1881 		{
1882 		  Elf_Internal_Rela outrel;
1883 		  bfd_byte *loc;
1884 
1885 		  off &= ~3;
1886 
1887 		  if (h != NULL)
1888 		    h->got.offset |= 1;
1889 		  else
1890 		    local_got_offsets[r_symndx] |= 1;
1891 
1892 		  srelgot = htab->root.srelgot;
1893 		  BFD_ASSERT (srelgot != NULL);
1894 
1895 		  if (h != NULL && h->dynindx != -1)
1896 		    {
1897 		      outrel.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_32_TPREL);
1898 		      relocation = 0;
1899 		    }
1900 		  else
1901 		    {
1902 		      outrel.r_info = ELF32_R_INFO (0, R_CRIS_32_TPREL);
1903 
1904 		      /* NULL if we had an error.  */
1905 		      relocation -= elf_hash_table (info)->tls_sec == NULL
1906 			? 0 : elf_hash_table (info)->tls_sec->vma;
1907 		    }
1908 
1909 		  /* Just "define" the initial contents in some
1910 		     semi-logical way.  */
1911 		  bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1912 
1913 		  outrel.r_offset = (sgot->output_section->vma
1914 				     + sgot->output_offset
1915 				     + off);
1916 		  outrel.r_addend = relocation;
1917 		  loc = srelgot->contents;
1918 		  loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
1919 		  /* NULL if we had an error.  */
1920 		  if (srelgot->contents != NULL)
1921 		    bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1922 		}
1923 	      else
1924 		off &= ~3;
1925 
1926 	      relocation = sgot->output_offset + off
1927 		+ (r_type == R_CRIS_32_IE ? sgot->output_section->vma : 0);
1928 	    }
1929 
1930 	  /* The GOT-relative offset to the GOT entry is the relocation,
1931 	     or for R_CRIS_32_GD, the actual address of the GOT entry.  */
1932 	  break;
1933 
1934 	case R_CRIS_16_TPREL:
1935 	case R_CRIS_32_TPREL:
1936 	  /* This relocation must only be performed against symbols
1937 	     defined in an ordinary (non-DSO) object.  */
1938 	  if (bfd_link_pic (info))
1939 	    {
1940 	      bfd_set_error (bfd_error_invalid_operation);
1941 
1942 	      /* We've already informed in cris_elf_check_relocs that
1943 		 this is an error.  */
1944 	      return false;
1945 	    }
1946 
1947 	  if (h != NULL
1948 	      && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1949 	      && !(h->def_regular || ELF_COMMON_DEF_P (h))
1950 	      /* If it's undefined, then an error message has already
1951 		 been emitted.  */
1952 	      && h->root.type != bfd_link_hash_undefined)
1953 	    {
1954 	      _bfd_error_handler
1955 		/* xgettext:c-format */
1956 		(_("%pB, section %pA: relocation %s is"
1957 		   " not allowed for symbol: `%s'"
1958 		   " which is defined outside the program,"
1959 		   " perhaps a declaration mixup?"),
1960 		 input_bfd,
1961 		 input_section,
1962 		 cris_elf_howto_table[r_type].name,
1963 		 symname);
1964 	      bfd_set_error (bfd_error_bad_value);
1965 	      return false;
1966 	    }
1967 
1968 	  /* NULL if we had an error.  */
1969 	  relocation -= elf_hash_table (info)->tls_sec == NULL
1970 	    ? 0
1971 	    : (elf_hash_table (info)->tls_sec->vma
1972 	       + elf_hash_table (info)->tls_size);
1973 
1974 	  /* The TLS-relative offset is the relocation.  */
1975 	  break;
1976 
1977 	default:
1978 	  BFD_FAIL ();
1979 	  return false;
1980 	}
1981 
1982       r = cris_final_link_relocate (howto, input_bfd, input_section,
1983 				     contents, rel, relocation);
1984 
1985       if (r != bfd_reloc_ok)
1986 	{
1987 	  const char * msg = (const char *) NULL;
1988 
1989 	  switch (r)
1990 	    {
1991 	    case bfd_reloc_overflow:
1992 	      (*info->callbacks->reloc_overflow)
1993 		(info, (h ? &h->root : NULL), symname, howto->name,
1994 		 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1995 	      if (additional_relocation_error_msg_count > 0)
1996 		{
1997 		  additional_relocation_error_msg_count--;
1998 		  switch (r_type)
1999 		    {
2000 		    case R_CRIS_16_GOTPLT:
2001 		    case R_CRIS_16_GOT:
2002 
2003 		      /* Not just TLS is involved here, so we make
2004 			 generation and message depend on -fPIC/-fpic
2005 			 only.  */
2006 		    case R_CRIS_16_GOT_TPREL:
2007 		    case R_CRIS_16_GOT_GD:
2008 		      _bfd_error_handler
2009 			(_("(too many global variables for -fpic:"
2010 			   " recompile with -fPIC)"));
2011 		      break;
2012 
2013 		    case R_CRIS_16_TPREL:
2014 		    case R_CRIS_16_DTPREL:
2015 		      _bfd_error_handler
2016 			(_("(thread-local data too big for -fpic or"
2017 			   " -msmall-tls: recompile with -fPIC or"
2018 			   " -mno-small-tls)"));
2019 		      break;
2020 
2021 		      /* No known cause for overflow for other relocs.  */
2022 		    default:
2023 		      break;
2024 		    }
2025 		}
2026 	      break;
2027 
2028 	    case bfd_reloc_undefined:
2029 	      (*info->callbacks->undefined_symbol)
2030 		(info, symname, input_bfd, input_section, rel->r_offset, true);
2031 	      break;
2032 
2033 	    case bfd_reloc_outofrange:
2034 	      msg = _("internal error: out of range error");
2035 	      break;
2036 
2037 	    case bfd_reloc_notsupported:
2038 	      msg = _("internal error: unsupported relocation error");
2039 	      break;
2040 
2041 	    case bfd_reloc_dangerous:
2042 	      msg = _("internal error: dangerous relocation");
2043 	      break;
2044 
2045 	    default:
2046 	      msg = _("internal error: unknown error");
2047 	      break;
2048 	    }
2049 
2050 	  if (msg)
2051 	    (*info->callbacks->warning) (info, msg, symname, input_bfd,
2052 					 input_section, rel->r_offset);
2053 	}
2054     }
2055 
2056   return true;
2057 }
2058 
2059 /* Finish up dynamic symbol handling.  We set the contents of various
2060    dynamic sections here.  */
2061 
2062 static bool
elf_cris_finish_dynamic_symbol(bfd * output_bfd,struct bfd_link_info * info,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)2063 elf_cris_finish_dynamic_symbol (bfd *output_bfd,
2064 				struct bfd_link_info *info,
2065 				struct elf_link_hash_entry *h,
2066 				Elf_Internal_Sym *sym)
2067 {
2068   struct elf_cris_link_hash_table * htab;
2069 
2070   /* Where in the plt entry to put values.  */
2071   int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
2072 
2073   /* What offset to add to the distance to the first PLT entry for the
2074      value at plt_off3.   */
2075   int plt_off3_value_bias = 4;
2076 
2077   /* Where in the PLT entry the call-dynlink-stub is (happens to be same
2078      for PIC and non-PIC for v32 and pre-v32).  */
2079   int plt_stub_offset = 8;
2080   int plt_entry_size = PLT_ENTRY_SIZE;
2081   const bfd_byte *plt_entry = elf_cris_plt_entry;
2082   const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
2083 
2084   htab = elf_cris_hash_table (info);
2085   if (htab == NULL)
2086     return false;
2087 
2088   /* Adjust the various PLT entry offsets.  */
2089   if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
2090     {
2091       plt_off2 = 14;
2092       plt_off3 = 20;
2093       plt_off3_value_bias = -2;
2094       plt_stub_offset = 12;
2095       plt_entry_size = PLT_ENTRY_SIZE_V32;
2096       plt_entry = elf_cris_plt_entry_v32;
2097       plt_pic_entry = elf_cris_pic_plt_entry_v32;
2098     }
2099 
2100   if (h->plt.offset != (bfd_vma) -1)
2101     {
2102       asection *splt;
2103       asection *sgotplt;
2104       asection *srela;
2105       bfd_vma got_base;
2106 
2107       bfd_vma gotplt_offset
2108 	= elf_cris_hash_entry (h)->gotplt_offset;
2109       Elf_Internal_Rela rela;
2110       bfd_byte *loc;
2111       bool has_gotplt = gotplt_offset != 0;
2112 
2113       /* Get the index in the .rela.plt relocations for the .got.plt
2114 	 entry that corresponds to this symbol.
2115 	 We have to count backwards here, and the result is only valid
2116 	 as an index into .rela.plt.  We also have to undo the effect
2117 	 of the R_CRIS_DTPMOD entry at .got index 3 (offset 12 into
2118 	 .got.plt) for which gotplt_offset is adjusted, because while
2119 	 that entry goes into .got.plt, its relocation goes into
2120 	 .rela.got, not .rela.plt.  (It's not PLT-specific; not to be
2121 	 processed as part of the runtime lazy .rela.plt relocation).
2122 	 FIXME: There be literal constants here...  */
2123       bfd_vma rela_plt_index
2124 	= (htab->dtpmod_refcount != 0
2125 	   ? gotplt_offset/4 - 2 - 3 : gotplt_offset/4 - 3);
2126 
2127       /* Get the offset into the .got table of the entry that corresponds
2128 	 to this function.  Note that we embed knowledge that "incoming"
2129 	 .got goes after .got.plt in the output without padding (pointer
2130 	 aligned).  However, that knowledge is present in several other
2131 	 places too.  */
2132       bfd_vma got_offset
2133 	= (has_gotplt
2134 	   ? gotplt_offset
2135 	   : h->got.offset + htab->next_gotplt_entry);
2136 
2137       /* This symbol has an entry in the procedure linkage table.  Set it
2138 	 up.  */
2139 
2140       BFD_ASSERT (h->dynindx != -1);
2141 
2142       splt = htab->root.splt;
2143       sgotplt = htab->root.sgotplt;
2144       srela = htab->root.srelplt;
2145       BFD_ASSERT (splt != NULL && sgotplt != NULL
2146 		  && (! has_gotplt || srela != NULL));
2147 
2148       got_base = sgotplt->output_section->vma + sgotplt->output_offset;
2149 
2150       /* Fill in the entry in the procedure linkage table.  */
2151       if (! bfd_link_pic (info))
2152 	{
2153 	  memcpy (splt->contents + h->plt.offset, plt_entry,
2154 		  plt_entry_size);
2155 
2156 	  /* We need to enter the absolute address of the GOT entry here.  */
2157 	  bfd_put_32 (output_bfd, got_base + got_offset,
2158 		      splt->contents + h->plt.offset + plt_off1);
2159 	}
2160       else
2161 	{
2162 	  memcpy (splt->contents + h->plt.offset, plt_pic_entry,
2163 		  plt_entry_size);
2164 	  bfd_put_32 (output_bfd, got_offset,
2165 		      splt->contents + h->plt.offset + plt_off1);
2166 	}
2167 
2168       /* Fill in the plt entry and make a relocation, if this is a "real"
2169 	 PLT entry.  */
2170       if (has_gotplt)
2171 	{
2172 	  /* Fill in the offset to the reloc table.  */
2173 	  bfd_put_32 (output_bfd,
2174 		      rela_plt_index * sizeof (Elf32_External_Rela),
2175 		      splt->contents + h->plt.offset + plt_off2);
2176 
2177 	  /* Fill in the offset to the first PLT entry, where to "jump".  */
2178 	  bfd_put_32 (output_bfd,
2179 		      - (h->plt.offset + plt_off3 + plt_off3_value_bias),
2180 		      splt->contents + h->plt.offset + plt_off3);
2181 
2182 	  /* Fill in the entry in the global offset table with the address of
2183 	     the relocating stub.  */
2184 	  bfd_put_32 (output_bfd,
2185 		      (splt->output_section->vma
2186 		       + splt->output_offset
2187 		       + h->plt.offset
2188 		       + plt_stub_offset),
2189 		      sgotplt->contents + got_offset);
2190 
2191 	  /* Fill in the entry in the .rela.plt section.  */
2192 	  rela.r_offset = (sgotplt->output_section->vma
2193 			   + sgotplt->output_offset
2194 			   + got_offset);
2195 	  rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
2196 	  rela.r_addend = 0;
2197 	  loc = srela->contents + rela_plt_index * sizeof (Elf32_External_Rela);
2198 	  bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2199 	}
2200 
2201       if (!h->def_regular)
2202 	{
2203 	  /* Mark the symbol as undefined, rather than as defined in
2204 	     the .plt section.  Leave the value alone.  */
2205 	  sym->st_shndx = SHN_UNDEF;
2206 
2207 	  /* FIXME: From elf32-sparc.c 2001-02-19 (1.18).  I still don't
2208 	     know whether resetting the value is significant; if it really
2209 	     is, rather than a quirk or bug in the sparc port, then I
2210 	     believe we'd see this elsewhere.  */
2211 	  /* If the symbol is weak, we do need to clear the value.
2212 	     Otherwise, the PLT entry would provide a definition for
2213 	     the symbol even if the symbol wasn't defined anywhere,
2214 	     and so the symbol would never be NULL.  */
2215 	  if (!h->ref_regular_nonweak)
2216 	    sym->st_value = 0;
2217 	}
2218     }
2219 
2220   /* For an ordinary program, we emit .got relocs only for symbols that
2221      are in the dynamic-symbols table and are either defined by the
2222      program or are undefined weak symbols, or are function symbols
2223      where we do not output a PLT: the PLT reloc was output above and all
2224      references to the function symbol are redirected to the PLT.  */
2225   if (h->got.offset != (bfd_vma) -1
2226       && (elf_cris_hash_entry (h)->reg_got_refcount > 0)
2227       && (bfd_link_pic (info)
2228 	  || (h->dynindx != -1
2229 	      && h->plt.offset == (bfd_vma) -1
2230 	      && !h->def_regular
2231 	      && h->root.type != bfd_link_hash_undefweak)))
2232     {
2233       asection *sgot;
2234       asection *srela;
2235       Elf_Internal_Rela rela;
2236       bfd_byte *loc;
2237       bfd_byte *where;
2238 
2239       /* This symbol has an entry in the global offset table.  Set it up.  */
2240 
2241       sgot = htab->root.sgot;
2242       srela = htab->root.srelgot;
2243       BFD_ASSERT (sgot != NULL && srela != NULL);
2244 
2245       rela.r_offset = (sgot->output_section->vma
2246 		       + sgot->output_offset
2247 		       + (h->got.offset &~ (bfd_vma) 1));
2248 
2249       /* If this is a static link, or it is a -Bsymbolic link and the
2250 	 symbol is defined locally or was forced to be local because
2251 	 of a version file, we just want to emit a RELATIVE reloc.
2252 	 The entry in the global offset table will already have been
2253 	 initialized in the relocate_section function.  */
2254       where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
2255       if (! elf_hash_table (info)->dynamic_sections_created
2256 	  || (bfd_link_pic (info)
2257 	      && (SYMBOLIC_BIND (info, h) || h->dynindx == -1)
2258 	      && h->def_regular))
2259 	{
2260 	  rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
2261 	  rela.r_addend = bfd_get_signed_32 (output_bfd, where);
2262 	}
2263       else
2264 	{
2265 	  bfd_put_32 (output_bfd, (bfd_vma) 0, where);
2266 	  rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
2267 	  rela.r_addend = 0;
2268 	}
2269 
2270       loc = srela->contents;
2271       loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
2272       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2273     }
2274 
2275   if (h->needs_copy)
2276     {
2277       asection *s;
2278       Elf_Internal_Rela rela;
2279       bfd_byte *loc;
2280 
2281       /* This symbol needs a copy reloc.  Set it up.  */
2282 
2283       BFD_ASSERT (h->dynindx != -1
2284 		  && (h->root.type == bfd_link_hash_defined
2285 		      || h->root.type == bfd_link_hash_defweak));
2286 
2287       if (h->root.u.def.section == htab->root.sdynrelro)
2288 	s = htab->root.sreldynrelro;
2289       else
2290 	s = htab->root.srelbss;
2291 
2292       rela.r_offset = (h->root.u.def.value
2293 		       + h->root.u.def.section->output_section->vma
2294 		       + h->root.u.def.section->output_offset);
2295       rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
2296       rela.r_addend = 0;
2297       loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
2298       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
2299     }
2300 
2301   /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  */
2302   if (h == elf_hash_table (info)->hdynamic
2303       || h == elf_hash_table (info)->hgot)
2304     sym->st_shndx = SHN_ABS;
2305 
2306   return true;
2307 }
2308 
2309 /* Finish up the dynamic sections.  Do *not* emit relocs here, as their
2310    offsets were changed, as part of -z combreloc handling, from those we
2311    computed.  */
2312 
2313 static bool
elf_cris_finish_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)2314 elf_cris_finish_dynamic_sections (bfd *output_bfd,
2315 				  struct bfd_link_info *info)
2316 {
2317   bfd *dynobj;
2318   asection *sgot;
2319   asection *sdyn;
2320 
2321   dynobj = elf_hash_table (info)->dynobj;
2322 
2323   sgot = elf_hash_table (info)->sgotplt;
2324   BFD_ASSERT (sgot != NULL);
2325   sdyn = bfd_get_linker_section (dynobj, ".dynamic");
2326 
2327   if (elf_hash_table (info)->dynamic_sections_created)
2328     {
2329       asection *splt;
2330       Elf32_External_Dyn *dyncon, *dynconend;
2331 
2332       splt = elf_hash_table (info)->splt;
2333       BFD_ASSERT (splt != NULL && sdyn != NULL);
2334 
2335       dyncon = (Elf32_External_Dyn *) sdyn->contents;
2336       dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
2337       for (; dyncon < dynconend; dyncon++)
2338 	{
2339 	  Elf_Internal_Dyn dyn;
2340 	  asection *s;
2341 
2342 	  bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
2343 
2344 	  switch (dyn.d_tag)
2345 	    {
2346 	    default:
2347 	      break;
2348 
2349 	    case DT_PLTGOT:
2350 	      dyn.d_un.d_ptr = sgot->output_section->vma + sgot->output_offset;
2351 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2352 	      break;
2353 
2354 	    case DT_JMPREL:
2355 	      /* Yes, we *can* have a .plt and no .plt.rela, for instance
2356 		 if all symbols are found in the .got (not .got.plt).  */
2357 	      s = elf_hash_table (info)->srelplt;
2358 	      dyn.d_un.d_ptr = s != NULL ? (s->output_section->vma
2359 					    + s->output_offset) : 0;
2360 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
2361 	      break;
2362 
2363 	    case DT_PLTRELSZ:
2364 	      s = elf_hash_table (info)->srelplt;
2365 	      if (s == NULL)
2366 		dyn.d_un.d_val = 0;
2367 	      else
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 (bfd_link_pic (info))
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 (bfd_link_pic (info))
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 /* The elf_backend_plt_sym_val hook function.  */
2464 
2465 static bfd_vma
cris_elf_plt_sym_val(bfd_vma i ATTRIBUTE_UNUSED,const asection * plt,const arelent * rel)2466 cris_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED, const asection *plt,
2467 		      const arelent *rel)
2468 {
2469   bfd_size_type plt_entry_size;
2470   bfd_size_type pltoffs;
2471   bfd *abfd = plt->owner;
2472 
2473   /* Same for CRIS and CRIS v32; see elf_cris_(|pic_)plt_entry(|_v32)[].  */
2474   bfd_size_type plt_entry_got_offset = 2;
2475   bfd_size_type plt_sec_size;
2476   bfd_size_type got_vma_for_dyn;
2477   asection *got;
2478 
2479   /* FIXME: the .got section should be readily available also when
2480      we're not linking.  */
2481   if ((got = bfd_get_section_by_name (abfd, ".got")) == NULL)
2482     return (bfd_vma) -1;
2483 
2484   plt_sec_size =  bfd_section_size (plt);
2485   plt_entry_size
2486     = (bfd_get_mach (abfd) == bfd_mach_cris_v32
2487        ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2488 
2489   /* Data in PLT is GOT-relative for DYN, but absolute for EXE.  */
2490   got_vma_for_dyn = (abfd->flags & EXEC_P) ? 0 : got->vma;
2491 
2492   /* Because we can have merged GOT entries; a single .got entry for
2493      both GOT and the PLT part of the GOT (.got.plt), the index of the
2494      reloc in .rela.plt is not the same as the index in the PLT.
2495      Instead, we have to hunt down the GOT offset in the PLT that
2496      corresponds to that of this reloc.  Unfortunately, we will only
2497      be called for the .rela.plt relocs, so we'll miss synthetic
2498      symbols for .plt entries with merged GOT entries.  (FIXME:
2499      fixable by providing our own bfd_elf32_get_synthetic_symtab.
2500      Doesn't seem worthwile at time of this writing.)  FIXME: we've
2501      gone from O(1) to O(N) (N number of PLT entries) for finding each
2502      PLT address.  Shouldn't matter in practice though.  */
2503 
2504   for (pltoffs = plt_entry_size;
2505        pltoffs < plt_sec_size;
2506        pltoffs += plt_entry_size)
2507     {
2508       bfd_size_type got_offset;
2509       bfd_byte gotoffs_raw[4];
2510 
2511       if (!bfd_get_section_contents (abfd, (asection *) plt, gotoffs_raw,
2512 				     pltoffs + plt_entry_got_offset,
2513 				     sizeof (gotoffs_raw)))
2514 	return (bfd_vma) -1;
2515 
2516       got_offset = bfd_get_32 (abfd, gotoffs_raw);
2517       if (got_offset + got_vma_for_dyn == rel->address)
2518 	return plt->vma + pltoffs;
2519     }
2520 
2521   /* While it's tempting to BFD_ASSERT that we shouldn't get here,
2522      that'd not be graceful behavior for invalid input.  */
2523   return (bfd_vma) -1;
2524 }
2525 
2526 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2527    entry but we found we will not create any.  Called when we find we will
2528    not have any PLT for this symbol, by for example
2529    elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2530    or elf_cris_size_dynamic_sections if no dynamic sections will be
2531    created (we're only linking static objects).  */
2532 
2533 static bool
elf_cris_adjust_gotplt_to_got(struct elf_cris_link_hash_entry * h,void * p)2534 elf_cris_adjust_gotplt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2535 {
2536   struct bfd_link_info *info = (struct bfd_link_info *) p;
2537 
2538   /* A GOTPLT reloc, when activated, is supposed to be included into
2539      the PLT refcount, when the symbol isn't set-or-forced local.  */
2540   BFD_ASSERT (h->gotplt_refcount == 0
2541 	      || h->root.plt.refcount == -1
2542 	      || h->gotplt_refcount <= h->root.plt.refcount);
2543 
2544   /* If nobody wanted a GOTPLT with this symbol, we're done.  */
2545   if (h->gotplt_refcount <= 0)
2546     return true;
2547 
2548   if (h->reg_got_refcount > 0)
2549     {
2550       /* There's a GOT entry for this symbol.  Just adjust the refcounts.
2551 	 Probably not necessary at this stage, but keeping them accurate
2552 	 helps avoiding surprises later.  */
2553       h->root.got.refcount += h->gotplt_refcount;
2554       h->reg_got_refcount += h->gotplt_refcount;
2555       h->gotplt_refcount = 0;
2556     }
2557   else
2558     {
2559       /* No GOT entry for this symbol.  We need to create one.  */
2560       asection *sgot;
2561       asection *srelgot;
2562 
2563       sgot = elf_hash_table (info)->sgot;
2564       srelgot = elf_hash_table (info)->srelgot;
2565 
2566       /* Put accurate refcounts there.  */
2567       BFD_ASSERT (h->root.got.refcount >= 0);
2568       h->root.got.refcount += h->gotplt_refcount;
2569       h->reg_got_refcount = h->gotplt_refcount;
2570 
2571       h->gotplt_refcount = 0;
2572 
2573       /* We always have a .got and a .rela.got section if there were
2574 	 GOTPLT relocs in input.  */
2575       BFD_ASSERT (sgot != NULL && srelgot != NULL);
2576 
2577       /* Allocate space in the .got section.  */
2578       sgot->size += 4;
2579 
2580       /* Allocate relocation space.  */
2581       srelgot->size += sizeof (Elf32_External_Rela);
2582     }
2583 
2584   return true;
2585 }
2586 
2587 /* Try to fold PLT entries with GOT entries.  There are two cases when we
2588    want to do this:
2589 
2590    - When all PLT references are GOTPLT references, and there are GOT
2591      references, and this is not the executable.  We don't have to
2592      generate a PLT at all.
2593 
2594    - When there are both (ordinary) PLT references and GOT references,
2595      and this isn't the executable.
2596      We want to make the PLT reference use the ordinary GOT entry rather
2597      than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2598      since the GOT entry will have to be resolved at startup anyway.
2599 
2600    Though the latter case is handled when room for the PLT is allocated,
2601    not here.
2602 
2603    By folding into the GOT, we may need a round-trip to a PLT in the
2604    executable for calls, a loss in performance.  Still, losing a
2605    reloc is a win in size and at least in start-up time.
2606 
2607    Note that this function is called before symbols are forced local by
2608    version scripts.  The differing cases are handled by
2609    elf_cris_hide_symbol.  */
2610 
2611 static bool
elf_cris_try_fold_plt_to_got(struct elf_cris_link_hash_entry * h,void * p)2612 elf_cris_try_fold_plt_to_got (struct elf_cris_link_hash_entry *h, void * p)
2613 {
2614   struct bfd_link_info *info = (struct bfd_link_info *) p;
2615 
2616   /* If there are no GOT references for this symbol, we can't fold any
2617      other reference so there's nothing to do.  Likewise if there are no
2618      PLT references; GOTPLT references included.  */
2619   if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2620     return true;
2621 
2622   /* GOTPLT relocs are supposed to be included into the PLT refcount.  */
2623   BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2624 
2625   if (h->gotplt_refcount == h->root.plt.refcount)
2626     {
2627       /* The only PLT references are GOTPLT references, and there are GOT
2628 	 references.  Convert PLT to GOT references.  */
2629       if (! elf_cris_adjust_gotplt_to_got (h, info))
2630 	return false;
2631 
2632       /* Clear the PLT references, so no PLT will be created.  */
2633       h->root.plt.offset = (bfd_vma) -1;
2634     }
2635 
2636   return true;
2637 }
2638 
2639 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2640    to use a GOT entry (and create one) rather than requiring a GOTPLT
2641    entry.  */
2642 
2643 static void
elf_cris_hide_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h,bool force_local)2644 elf_cris_hide_symbol (struct bfd_link_info *info,
2645 		      struct elf_link_hash_entry *h,
2646 		      bool force_local)
2647 {
2648   elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2649 
2650   _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2651 }
2652 
2653 /* Adjust a symbol defined by a dynamic object and referenced by a
2654    regular object.  The current definition is in some section of the
2655    dynamic object, but we're not including those sections.  We have to
2656    change the definition to something the rest of the link can
2657    understand.  */
2658 
2659 static bool
elf_cris_adjust_dynamic_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h)2660 elf_cris_adjust_dynamic_symbol (struct bfd_link_info *info,
2661 				struct elf_link_hash_entry *h)
2662 {
2663   struct elf_cris_link_hash_table * htab;
2664   bfd *dynobj;
2665   asection *s;
2666   asection *srel;
2667   bfd_size_type plt_entry_size;
2668 
2669   htab = elf_cris_hash_table (info);
2670   if (htab == NULL)
2671     return false;
2672 
2673   dynobj = htab->root.dynobj;
2674 
2675   /* Make sure we know what is going on here.  */
2676   BFD_ASSERT (dynobj != NULL
2677 	      && (h->needs_plt
2678 		  || h->is_weakalias
2679 		  || (h->def_dynamic
2680 		      && h->ref_regular
2681 		      && !h->def_regular)));
2682 
2683   plt_entry_size
2684     = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2685        ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2686 
2687   /* If this is a function, put it in the procedure linkage table.  We
2688      will fill in the contents of the procedure linkage table later,
2689      when we know the address of the .got section.  */
2690   if (h->type == STT_FUNC
2691       || h->needs_plt)
2692     {
2693       /* If we link a program (not a DSO), we'll get rid of unnecessary
2694 	 PLT entries; we point to the actual symbols -- even for pic
2695 	 relocs, because a program built with -fpic should have the same
2696 	 result as one built without -fpic, specifically considering weak
2697 	 symbols.
2698 	 FIXME: m68k and i386 differ here, for unclear reasons.  */
2699       if (! bfd_link_pic (info)
2700 	  && !h->def_dynamic)
2701 	{
2702 	  /* This case can occur if we saw a PLT reloc in an input file,
2703 	     but the symbol was not defined by a dynamic object.  In such
2704 	     a case, we don't actually need to build a procedure linkage
2705 	     table, and we can just do an absolute or PC reloc instead, or
2706 	     change a .got.plt index to a .got index for GOTPLT relocs.  */
2707 	  BFD_ASSERT (h->needs_plt);
2708 	  h->needs_plt = 0;
2709 	  h->plt.offset = (bfd_vma) -1;
2710 	  return
2711 	    elf_cris_adjust_gotplt_to_got ((struct
2712 					    elf_cris_link_hash_entry *) h,
2713 					   info);
2714 	}
2715 
2716       /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2717 	 where a pointer-equivalent symbol was unimportant (i.e. more
2718 	 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2719 	 of the PLT.  We can't for the executable, because the GOT
2720 	 entries will point to the PLT there (and be constant).  */
2721       if (bfd_link_pic (info)
2722 	  && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2723 					    h, info))
2724 	return false;
2725 
2726       /* GC or folding may have rendered this entry unused.  */
2727       if (h->plt.refcount <= 0)
2728 	{
2729 	  h->needs_plt = 0;
2730 	  h->plt.offset = (bfd_vma) -1;
2731 	  return true;
2732 	}
2733 
2734       /* Make sure this symbol is output as a dynamic symbol.  */
2735       if (h->dynindx == -1)
2736 	{
2737 	  if (! bfd_elf_link_record_dynamic_symbol (info, h))
2738 	    return false;
2739 	}
2740 
2741       s = htab->root.splt;
2742       BFD_ASSERT (s != NULL);
2743 
2744       /* If this is the first .plt entry, make room for the special
2745 	 first entry.  */
2746       if (s->size == 0)
2747 	s->size += plt_entry_size;
2748 
2749       /* If this symbol is not defined in a regular file, and we are
2750 	 not generating a shared library, then set the symbol to this
2751 	 location in the .plt.  */
2752       if (!bfd_link_pic (info)
2753 	  && !h->def_regular)
2754 	{
2755 	  h->root.u.def.section = s;
2756 	  h->root.u.def.value = s->size;
2757 	}
2758 
2759       /* If there's already a GOT entry, use that, not a .got.plt.  A
2760 	 GOT field still has a reference count when we get here; it's
2761 	 not yet changed to an offset.  We can't do this for an
2762 	 executable, because then the reloc associated with the PLT
2763 	 would get a non-PLT reloc pointing to the PLT.  FIXME: Move
2764 	 this to elf_cris_try_fold_plt_to_got.  */
2765       if (bfd_link_pic (info) && h->got.refcount > 0)
2766 	{
2767 	  h->got.refcount += h->plt.refcount;
2768 
2769 	  /* Mark the PLT offset to use the GOT entry by setting the low
2770 	     bit in the plt offset; it is always a multiple of
2771 	     plt_entry_size (which is at least a multiple of 2).  */
2772 	  BFD_ASSERT ((s->size % plt_entry_size) == 0);
2773 
2774 	  /* Change the PLT refcount to an offset.  */
2775 	  h->plt.offset = s->size;
2776 
2777 	  /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2778 	     that the got entry should be used instead.  */
2779 	  BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2780 		       h)->gotplt_offset == 0);
2781 
2782 	  /* Make room for this entry.  */
2783 	  s->size += plt_entry_size;
2784 
2785 	  return true;
2786 	}
2787 
2788       /* No GOT reference for this symbol; prepare for an ordinary PLT.  */
2789       h->plt.offset = s->size;
2790 
2791       /* Make room for this entry.  */
2792       s->size += plt_entry_size;
2793 
2794       /* We also need to make an entry in the .got.plt section, which
2795 	 will be placed in the .got section by the linker script.  */
2796       ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2797 	= htab->next_gotplt_entry;
2798       htab->next_gotplt_entry += 4;
2799 
2800       s = htab->root.sgotplt;
2801       BFD_ASSERT (s != NULL);
2802       s->size += 4;
2803 
2804       /* We also need to make an entry in the .rela.plt section.  */
2805 
2806       s = htab->root.srelplt;
2807       BFD_ASSERT (s != NULL);
2808       s->size += sizeof (Elf32_External_Rela);
2809 
2810       return true;
2811     }
2812 
2813   /* Reinitialize the plt offset now that it is not used as a reference
2814      count any more.  */
2815   h->plt.offset = (bfd_vma) -1;
2816 
2817   /* If this is a weak symbol, and there is a real definition, the
2818      processor independent code will have arranged for us to see the
2819      real definition first, and we can just use the same value.  */
2820   if (h->is_weakalias)
2821     {
2822       struct elf_link_hash_entry *def = weakdef (h);
2823       BFD_ASSERT (def->root.type == bfd_link_hash_defined);
2824       h->root.u.def.section = def->root.u.def.section;
2825       h->root.u.def.value = def->root.u.def.value;
2826       return true;
2827     }
2828 
2829   /* This is a reference to a symbol defined by a dynamic object which
2830      is not a function.  */
2831 
2832   /* If we are creating a shared library, we must presume that the
2833      only references to the symbol are via the global offset table.
2834      For such cases we need not do anything here; the relocations will
2835      be handled correctly by relocate_section.  */
2836   if (bfd_link_pic (info))
2837     return true;
2838 
2839   /* If there are no references to this symbol that do not use the
2840      GOT, we don't need to generate a copy reloc.  */
2841   if (!h->non_got_ref)
2842     return true;
2843 
2844   /* We must allocate the symbol in our .dynbss section, which will
2845      become part of the .bss section of the executable.  There will be
2846      an entry for this symbol in the .dynsym section.  The dynamic
2847      object will contain position independent code, so all references
2848      from the dynamic object to this symbol will go through the global
2849      offset table.  The dynamic linker will use the .dynsym entry to
2850      determine the address it must put in the global offset table, so
2851      both the dynamic object and the regular object will refer to the
2852      same memory location for the variable.  */
2853 
2854   /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
2855      copy the initial value out of the dynamic object and into the
2856      runtime process image.  We need to remember the offset into the
2857      .rela.bss section we are going to use.  */
2858 
2859   if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
2860     {
2861       s = htab->root.sdynrelro;
2862       srel = htab->root.sreldynrelro;
2863     }
2864   else
2865     {
2866       s = htab->root.sdynbss;
2867       srel = htab->root.srelbss;
2868     }
2869   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
2870     {
2871       BFD_ASSERT (srel != NULL);
2872       srel->size += sizeof (Elf32_External_Rela);
2873       h->needs_copy = 1;
2874     }
2875 
2876   BFD_ASSERT (s != NULL);
2877 
2878   return _bfd_elf_adjust_dynamic_copy (info, h, s);
2879 }
2880 
2881 /* Adjust our "subclass" elements for an indirect symbol.  */
2882 
2883 static void
elf_cris_copy_indirect_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * dir,struct elf_link_hash_entry * ind)2884 elf_cris_copy_indirect_symbol (struct bfd_link_info *info,
2885 			       struct elf_link_hash_entry *dir,
2886 			       struct elf_link_hash_entry *ind)
2887 {
2888   struct elf_cris_link_hash_entry *edir, *eind;
2889 
2890   edir = (struct elf_cris_link_hash_entry *) dir;
2891   eind = (struct elf_cris_link_hash_entry *) ind;
2892 
2893   /* Only indirect symbols are replaced; we're not interested in
2894      updating any of EIND's fields for other symbols.  */
2895   if (eind->root.root.type != bfd_link_hash_indirect)
2896     {
2897       /* Still, we need to copy flags for e.g. weak definitions.  */
2898       _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2899       return;
2900     }
2901 
2902   BFD_ASSERT (edir->gotplt_offset == 0 || eind->gotplt_offset == 0);
2903 
2904 #define XMOVOPZ(F, OP, Z) edir->F OP eind->F; eind->F = Z
2905 #define XMOVE(F) XMOVOPZ (F, +=, 0)
2906   if (eind->pcrel_relocs_copied != NULL)
2907     {
2908       if (edir->pcrel_relocs_copied != NULL)
2909 	{
2910 	  struct elf_cris_pcrel_relocs_copied **pp;
2911 	  struct elf_cris_pcrel_relocs_copied *p;
2912 
2913 	  /* Add reloc counts against the indirect sym to the direct sym
2914 	     list.  Merge any entries against the same section.  */
2915 	  for (pp = &eind->pcrel_relocs_copied; *pp != NULL;)
2916 	    {
2917 	      struct elf_cris_pcrel_relocs_copied *q;
2918 	      p = *pp;
2919 	      for (q = edir->pcrel_relocs_copied; q != NULL; q = q->next)
2920 		if (q->section == p->section)
2921 		  {
2922 		    q->count += p->count;
2923 		    *pp = p->next;
2924 		    break;
2925 		  }
2926 	      if (q == NULL)
2927 		pp = &p->next;
2928 	    }
2929 	  *pp = edir->pcrel_relocs_copied;
2930 	}
2931       XMOVOPZ (pcrel_relocs_copied, =, NULL);
2932     }
2933   XMOVE (gotplt_refcount);
2934   XMOVE (gotplt_offset);
2935   XMOVE (reg_got_refcount);
2936   XMOVE (tprel_refcount);
2937   XMOVE (dtp_refcount);
2938 #undef XMOVE
2939 #undef XMOVOPZ
2940 
2941   _bfd_elf_link_hash_copy_indirect (info, dir, ind);
2942 }
2943 
2944 /* Look through the relocs for a section during the first phase.  */
2945 
2946 static bool
cris_elf_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)2947 cris_elf_check_relocs (bfd *abfd,
2948 		       struct bfd_link_info *info,
2949 		       asection *sec,
2950 		       const Elf_Internal_Rela *relocs)
2951 {
2952   struct elf_cris_link_hash_table * htab;
2953   bfd *dynobj;
2954   Elf_Internal_Shdr *symtab_hdr;
2955   struct elf_link_hash_entry **sym_hashes;
2956   bfd_signed_vma *local_got_refcounts;
2957   const Elf_Internal_Rela *rel;
2958   const Elf_Internal_Rela *rel_end;
2959   asection *sgot;
2960   asection *srelgot;
2961   asection *sreloc;
2962 
2963   if (bfd_link_relocatable (info))
2964     return true;
2965 
2966   htab = elf_cris_hash_table (info);
2967   if (htab == NULL)
2968     return false;
2969 
2970   dynobj = elf_hash_table (info)->dynobj;
2971   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2972   sym_hashes = elf_sym_hashes (abfd);
2973   local_got_refcounts = elf_local_got_refcounts (abfd);
2974 
2975   sgot = NULL;
2976   srelgot = NULL;
2977   sreloc = NULL;
2978 
2979   rel_end = relocs + sec->reloc_count;
2980   for (rel = relocs; rel < rel_end; rel++)
2981     {
2982       struct elf_link_hash_entry *h;
2983       unsigned long r_symndx;
2984       enum elf_cris_reloc_type r_type;
2985       bfd_signed_vma got_element_size = 4;
2986       unsigned long r_symndx_lgot = INT_MAX;
2987 
2988       r_symndx = ELF32_R_SYM (rel->r_info);
2989       if (r_symndx < symtab_hdr->sh_info)
2990 	{
2991 	  h = NULL;
2992 	  r_symndx_lgot = LGOT_REG_NDX (r_symndx);
2993 	}
2994       else
2995 	{
2996 	  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2997 	  while (h->root.type == bfd_link_hash_indirect
2998 		 || h->root.type == bfd_link_hash_warning)
2999 	    h = (struct elf_link_hash_entry *) h->root.u.i.link;
3000 	}
3001 
3002       r_type = ELF32_R_TYPE (rel->r_info);
3003 
3004       /* Some relocs require linker-created sections; we need to hang them
3005 	 on the first input bfd we found that contained dynamic relocs.  */
3006       switch (r_type)
3007 	{
3008 	case R_CRIS_32_DTPREL:
3009 	  if ((sec->flags & SEC_ALLOC) == 0)
3010 	    /* This'd be a .dtpreld entry in e.g. debug info.  We have
3011 	       several different switch statements below, but none of
3012 	       that is needed; we need no preparations for resolving
3013 	       R_CRIS_32_DTPREL into a non-allocated section (debug
3014 	       info), so let's just move on to the next
3015 	       relocation.  */
3016 	    continue;
3017 	  /* Fall through.  */
3018 	case R_CRIS_16_DTPREL:
3019 	  /* The first .got.plt entry is right after the R_CRIS_DTPMOD
3020 	     entry at index 3. */
3021 	  if (htab->dtpmod_refcount == 0)
3022 	    htab->next_gotplt_entry += 8;
3023 
3024 	  htab->dtpmod_refcount++;
3025 	  /* Fall through.  */
3026 
3027 	case R_CRIS_32_IE:
3028 	case R_CRIS_32_GD:
3029 	case R_CRIS_16_GOT_GD:
3030 	case R_CRIS_32_GOT_GD:
3031 	case R_CRIS_32_GOT_TPREL:
3032 	case R_CRIS_16_GOT_TPREL:
3033 	case R_CRIS_16_GOT:
3034 	case R_CRIS_32_GOT:
3035 	case R_CRIS_32_GOTREL:
3036 	case R_CRIS_32_PLT_GOTREL:
3037 	case R_CRIS_32_PLT_PCREL:
3038 	case R_CRIS_16_GOTPLT:
3039 	case R_CRIS_32_GOTPLT:
3040 	  if (dynobj == NULL)
3041 	    {
3042 	      elf_hash_table (info)->dynobj = dynobj = abfd;
3043 
3044 	      /* We could handle this if we can get a handle on the
3045 		 output bfd in elf_cris_adjust_dynamic_symbol.  Failing
3046 		 that, we must insist on dynobj being a specific mach.  */
3047 	      if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
3048 		{
3049 		  _bfd_error_handler
3050 		    /* xgettext:c-format */
3051 		    (_("%pB, section %pA: v10/v32 compatible object"
3052 		       " must not contain a PIC relocation"),
3053 		     abfd, sec);
3054 		  return false;
3055 		}
3056 	    }
3057 
3058 	  if (sgot == NULL)
3059 	    {
3060 	      /* We may have a dynobj but no .got section, if machine-
3061 		 independent parts of the linker found a reason to create
3062 		 a dynobj.  We want to create the .got section now, so we
3063 		 can assume it's always present whenever there's a dynobj.
3064 		 It's ok to call this function more than once.  */
3065 	      if (!_bfd_elf_create_got_section (dynobj, info))
3066 		return false;
3067 
3068 	      sgot = elf_hash_table (info)->sgot;
3069 	      srelgot = elf_hash_table (info)->srelgot;
3070 	    }
3071 
3072 	  if (local_got_refcounts == NULL)
3073 	    {
3074 	      bfd_size_type amt;
3075 
3076 	      /* We use index local_got_refcounts[-1] to count all
3077 		 GOT-relative relocations that do not have explicit
3078 		 GOT entries.  */
3079 	      amt = LGOT_ALLOC_NELTS_FOR (symtab_hdr->sh_info) + 1;
3080 	      amt *= sizeof (bfd_signed_vma);
3081 	      local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
3082 	      if (local_got_refcounts == NULL)
3083 		return false;
3084 
3085 	      local_got_refcounts++;
3086 	      elf_local_got_refcounts (abfd) = local_got_refcounts;
3087 	    }
3088 	  break;
3089 
3090 	default:
3091 	  break;
3092 	}
3093 
3094       /* Warn and error for invalid input.  */
3095       switch (r_type)
3096 	{
3097 	case R_CRIS_32_IE:
3098 	case R_CRIS_32_TPREL:
3099 	case R_CRIS_16_TPREL:
3100 	case R_CRIS_32_GD:
3101 	  if (bfd_link_pic (info))
3102 	    {
3103 	      _bfd_error_handler
3104 		/* xgettext:c-format */
3105 		(_("%pB, section %pA:\n  relocation %s not valid"
3106 		   " in a shared object;"
3107 		   " typically an option mixup, recompile with -fPIC"),
3108 		 abfd,
3109 		 sec,
3110 		 cris_elf_howto_table[r_type].name);
3111 	      /* Don't return FALSE here; we want messages for all of
3112 		 these and the error behavior is ungraceful
3113 		 anyway.  */
3114 	    }
3115 	default:
3116 	  break;
3117 	}
3118 
3119       switch (r_type)
3120 	{
3121 	case R_CRIS_32_GD:
3122 	case R_CRIS_16_GOT_GD:
3123 	case R_CRIS_32_GOT_GD:
3124 	  /* These are requests for tls_index entries, run-time R_CRIS_DTP.  */
3125 	  got_element_size = 8;
3126 	  r_symndx_lgot = LGOT_DTP_NDX (r_symndx);
3127 	  break;
3128 
3129 	case R_CRIS_16_DTPREL:
3130 	case R_CRIS_32_DTPREL:
3131 	  /* These two just request for the constant-index
3132 	     module-local tls_index-sized GOT entry, which we add
3133 	     elsewhere.  */
3134 	  break;
3135 
3136 	case R_CRIS_32_IE:
3137 	case R_CRIS_32_GOT_TPREL:
3138 	case R_CRIS_16_GOT_TPREL:
3139 	  r_symndx_lgot = LGOT_TPREL_NDX (r_symndx);
3140 
3141 	  /* Those relocs also require that a DSO is of type
3142 	     Initial Exec.  Like other targets, we don't reset this
3143 	     flag even if the relocs are GC:ed away.  */
3144 	  if (bfd_link_pic (info))
3145 	    info->flags |= DF_STATIC_TLS;
3146 	  break;
3147 
3148 	  /* Let's list the other assembler-generated TLS-relocs too,
3149 	     just to show that they're not forgotten. */
3150 	case R_CRIS_16_TPREL:
3151 	case R_CRIS_32_TPREL:
3152 	default:
3153 	  break;
3154 	}
3155 
3156       switch (r_type)
3157 	{
3158 	case R_CRIS_16_GOTPLT:
3159 	case R_CRIS_32_GOTPLT:
3160 	  /* Mark that we need a GOT entry if the PLT entry (and its GOT
3161 	     entry) is eliminated.  We can only do this for a non-local
3162 	     symbol.  */
3163 	  if (h != NULL)
3164 	    {
3165 	      elf_cris_hash_entry (h)->gotplt_refcount++;
3166 	      goto handle_gotplt_reloc;
3167 	    }
3168 	  /* If h is NULL then this is a local symbol, and we must make a
3169 	     GOT entry for it, so handle it like a GOT reloc.  */
3170 	  /* Fall through.  */
3171 
3172 	case R_CRIS_32_IE:
3173 	case R_CRIS_32_GD:
3174 	case R_CRIS_16_GOT_GD:
3175 	case R_CRIS_32_GOT_GD:
3176 	case R_CRIS_32_GOT_TPREL:
3177 	case R_CRIS_16_GOT_TPREL:
3178 	case R_CRIS_16_GOT:
3179 	case R_CRIS_32_GOT:
3180 	  /* This symbol requires a global offset table entry.  */
3181 	  if (h != NULL)
3182 	    {
3183 	      if (h->got.refcount == 0)
3184 		{
3185 		  /* Make sure this symbol is output as a dynamic symbol.  */
3186 		  if (h->dynindx == -1)
3187 		    {
3188 		      if (!bfd_elf_link_record_dynamic_symbol (info, h))
3189 			return false;
3190 		    }
3191 		}
3192 
3193 	      /* Update the sum of reloc counts for this symbol.  */
3194 	      h->got.refcount++;
3195 
3196 	      switch (r_type)
3197 		{
3198 		case R_CRIS_16_GOT:
3199 		case R_CRIS_32_GOT:
3200 		  if (elf_cris_hash_entry (h)->reg_got_refcount == 0)
3201 		    {
3202 		      /* Allocate space in the .got section.  */
3203 		      sgot->size += got_element_size;
3204 		      /* Allocate relocation space.  */
3205 		      srelgot->size += sizeof (Elf32_External_Rela);
3206 		    }
3207 		  elf_cris_hash_entry (h)->reg_got_refcount++;
3208 		  break;
3209 
3210 		case R_CRIS_32_GD:
3211 		case R_CRIS_16_GOT_GD:
3212 		case R_CRIS_32_GOT_GD:
3213 		  if (elf_cris_hash_entry (h)->dtp_refcount == 0)
3214 		    {
3215 		      /* Allocate space in the .got section.  */
3216 		      sgot->size += got_element_size;
3217 		      /* Allocate relocation space.  */
3218 		      srelgot->size += sizeof (Elf32_External_Rela);
3219 		    }
3220 		  elf_cris_hash_entry (h)->dtp_refcount++;
3221 		  break;
3222 
3223 		case R_CRIS_32_IE:
3224 		case R_CRIS_32_GOT_TPREL:
3225 		case R_CRIS_16_GOT_TPREL:
3226 		  if (elf_cris_hash_entry (h)->tprel_refcount == 0)
3227 		    {
3228 		      /* Allocate space in the .got section.  */
3229 		      sgot->size += got_element_size;
3230 		      /* Allocate relocation space.  */
3231 		      srelgot->size += sizeof (Elf32_External_Rela);
3232 		    }
3233 		  elf_cris_hash_entry (h)->tprel_refcount++;
3234 		  break;
3235 
3236 		default:
3237 		  BFD_FAIL ();
3238 		  break;
3239 		}
3240 	    }
3241 	  else
3242 	    {
3243 	      /* This is a global offset table entry for a local symbol.  */
3244 	      if (local_got_refcounts[r_symndx_lgot] == 0)
3245 		{
3246 		  sgot->size += got_element_size;
3247 		  if (bfd_link_pic (info))
3248 		    {
3249 		      /* If we are generating a shared object, we need
3250 			 to output a R_CRIS_RELATIVE reloc so that the
3251 			 dynamic linker can adjust this GOT entry.
3252 			 Similarly for non-regular got entries.  */
3253 		      srelgot->size += sizeof (Elf32_External_Rela);
3254 		    }
3255 		}
3256 	      /* Update the reloc-specific count.  */
3257 	      local_got_refcounts[r_symndx_lgot]++;
3258 
3259 	      /* This one is the sum of all the others.  */
3260 	      local_got_refcounts[r_symndx]++;
3261 	    }
3262 	  break;
3263 
3264 	case R_CRIS_16_DTPREL:
3265 	case R_CRIS_32_DTPREL:
3266 	case R_CRIS_32_GOTREL:
3267 	  /* This reference requires a global offset table.
3268 	     FIXME: The actual refcount isn't used currently; the .got
3269 	     section can't be removed if there were any references in the
3270 	     input.  */
3271 	  local_got_refcounts[-1]++;
3272 	  break;
3273 
3274 	handle_gotplt_reloc:
3275 
3276 	case R_CRIS_32_PLT_GOTREL:
3277 	  /* This reference requires a global offset table.  */
3278 	  local_got_refcounts[-1]++;
3279 	  /* Fall through.  */
3280 
3281 	case R_CRIS_32_PLT_PCREL:
3282 	  /* This symbol requires a procedure linkage table entry.  We
3283 	     actually build the entry in adjust_dynamic_symbol,
3284 	     because this might be a case of linking PIC code which is
3285 	     never referenced by a dynamic object, in which case we
3286 	     don't need to generate a procedure linkage table entry
3287 	     after all.  */
3288 
3289 	  /* Beware: if we'd check for visibility of the symbol here
3290 	     (and not marking the need for a PLT when non-visible), we'd
3291 	     get into trouble with keeping handling consistent with
3292 	     regards to relocs found before definition and GOTPLT
3293 	     handling.  Eliminable PLT entries will be dealt with later
3294 	     anyway.  */
3295 	  if (h == NULL)
3296 	    continue;
3297 
3298 	  h->needs_plt = 1;
3299 
3300 	  /* If the symbol is forced local, the refcount is unavailable.  */
3301 	  if (h->plt.refcount != -1)
3302 	    h->plt.refcount++;
3303 	  break;
3304 
3305 	case R_CRIS_8:
3306 	case R_CRIS_16:
3307 	case R_CRIS_32:
3308 	  /* Let's help debug shared library creation.  Any of these
3309 	     relocs *can* be used in shared libs, but pages containing
3310 	     them cannot be shared, so they're not appropriate for
3311 	     common use.  Don't warn for sections we don't care about,
3312 	     such as debug sections or non-constant sections.  We
3313 	     can't help tables of (global) function pointers, for
3314 	     example, though they must be emitted in a (writable) data
3315 	     section to avoid having impure text sections.  */
3316 	  if (bfd_link_pic (info)
3317 	      && (sec->flags & SEC_ALLOC) != 0
3318 	      && (sec->flags & SEC_READONLY) != 0)
3319 	    {
3320 	      /* FIXME: How do we make this optionally a warning only?  */
3321 	      _bfd_error_handler
3322 		/* xgettext:c-format */
3323 		(_("%pB, section %pA: relocation %s should not"
3324 		   " be used in a shared object; recompile with -fPIC"),
3325 		 abfd,
3326 		 sec,
3327 		 cris_elf_howto_table[r_type].name);
3328 	    }
3329 
3330 	  /* We don't need to handle relocs into sections not going into
3331 	     the "real" output.  */
3332 	  if ((sec->flags & SEC_ALLOC) == 0)
3333 	    break;
3334 
3335 	  if (h != NULL)
3336 	    {
3337 	      h->non_got_ref = 1;
3338 
3339 	      /* Make sure a plt entry is created for this symbol if it
3340 		 turns out to be a function defined by a dynamic object.  */
3341 	      if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3342 		h->plt.refcount++;
3343 	    }
3344 
3345 	  /* If we are creating a shared library and this is not a local
3346 	     symbol, we need to copy the reloc into the shared library.
3347 	     However when linking with -Bsymbolic and this is a global
3348 	     symbol which is defined in an object we are including in the
3349 	     link (i.e., DEF_REGULAR is set), then we can resolve the
3350 	     reloc directly.  At this point we have not seen all the input
3351 	     files, so it is possible that DEF_REGULAR is not set now but
3352 	     will be set later (it is never cleared).  In case of a weak
3353 	     definition, DEF_REGULAR may be cleared later by a strong
3354 	     definition in a shared library.  We account for that
3355 	     possibility below by storing information in the relocs_copied
3356 	     field of the hash table entry.  A similar situation occurs
3357 	     when creating shared libraries and symbol visibility changes
3358 	     render the symbol local.  */
3359 
3360 	  /* No need to do anything if we're not creating a shared object.  */
3361 	  if (! bfd_link_pic (info)
3362 	      || (h != NULL && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)))
3363 	    break;
3364 
3365 	  /* We may need to create a reloc section in the dynobj and made room
3366 	     for this reloc.  */
3367 	  if (sreloc == NULL)
3368 	    {
3369 	      sreloc = _bfd_elf_make_dynamic_reloc_section
3370 		(sec, dynobj, 2, abfd, /*rela?*/ true);
3371 
3372 	      if (sreloc == NULL)
3373 		return false;
3374 	    }
3375 
3376 	  if (sec->flags & SEC_READONLY)
3377 	    info->flags |= DF_TEXTREL;
3378 
3379 	  sreloc->size += sizeof (Elf32_External_Rela);
3380 	  break;
3381 
3382 	case R_CRIS_8_PCREL:
3383 	case R_CRIS_16_PCREL:
3384 	case R_CRIS_32_PCREL:
3385 	  if (h != NULL)
3386 	    {
3387 	      h->non_got_ref = 1;
3388 
3389 	      /* Make sure a plt entry is created for this symbol if it
3390 		 turns out to be a function defined by a dynamic object.  */
3391 	      if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
3392 		h->plt.refcount++;
3393 	    }
3394 
3395 	  /* If we are creating a shared library and this is not a local
3396 	     symbol, we need to copy the reloc into the shared library.
3397 	     However when linking with -Bsymbolic and this is a global
3398 	     symbol which is defined in an object we are including in the
3399 	     link (i.e., DEF_REGULAR is set), then we can resolve the
3400 	     reloc directly.  At this point we have not seen all the input
3401 	     files, so it is possible that DEF_REGULAR is not set now but
3402 	     will be set later (it is never cleared).  In case of a weak
3403 	     definition, DEF_REGULAR may be cleared later by a strong
3404 	     definition in a shared library.  We account for that
3405 	     possibility below by storing information in the relocs_copied
3406 	     field of the hash table entry.  A similar situation occurs
3407 	     when creating shared libraries and symbol visibility changes
3408 	     render the symbol local.  */
3409 
3410 	  /* No need to do anything if we're not creating a shared object.  */
3411 	  if (! bfd_link_pic (info))
3412 	    break;
3413 
3414 	  /* We don't need to handle relocs into sections not going into
3415 	     the "real" output.  */
3416 	  if ((sec->flags & SEC_ALLOC) == 0)
3417 	    break;
3418 
3419 	  /* If the symbol is local, then we know already we can
3420 	     eliminate the reloc.  */
3421 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3422 	    break;
3423 
3424 	  /* If this is with -Bsymbolic and the symbol isn't weak, and
3425 	     is defined by an ordinary object (the ones we include in
3426 	     this shared library) then we can also eliminate the
3427 	     reloc.  See comment above for more eliminable cases which
3428 	     we can't identify at this time.  */
3429 	  if (SYMBOLIC_BIND (info, h)
3430 	      && h->root.type != bfd_link_hash_defweak
3431 	      && h->def_regular)
3432 	    break;
3433 
3434 	  /* We may need to create a reloc section in the dynobj and made room
3435 	     for this reloc.  */
3436 	  if (sreloc == NULL)
3437 	    {
3438 	      sreloc = _bfd_elf_make_dynamic_reloc_section
3439 		(sec, dynobj, 2, abfd, /*rela?*/ true);
3440 
3441 	      if (sreloc == NULL)
3442 		return false;
3443 	    }
3444 
3445 	  sreloc->size += sizeof (Elf32_External_Rela);
3446 
3447 	  /* We count the number of PC relative relocations we have
3448 	     entered for this symbol, so that we can discard them
3449 	     again if the symbol is later defined by a regular object.
3450 	     We know that h is really a pointer to an
3451 	     elf_cris_link_hash_entry.  */
3452 	  {
3453 	    struct elf_cris_link_hash_entry *eh;
3454 	    struct elf_cris_pcrel_relocs_copied *p;
3455 
3456 	    eh = elf_cris_hash_entry (h);
3457 
3458 	    for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
3459 	      if (p->section == sec)
3460 		break;
3461 
3462 	    if (p == NULL)
3463 	      {
3464 		p = ((struct elf_cris_pcrel_relocs_copied *)
3465 		     bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
3466 		if (p == NULL)
3467 		  return false;
3468 		p->next = eh->pcrel_relocs_copied;
3469 		eh->pcrel_relocs_copied = p;
3470 		p->section = sec;
3471 		p->count = 0;
3472 		p->r_type = r_type;
3473 	      }
3474 
3475 	    ++p->count;
3476 	  }
3477 	  break;
3478 
3479 	/* This relocation describes the C++ object vtable hierarchy.
3480 	   Reconstruct it for later use during GC.  */
3481 	case R_CRIS_GNU_VTINHERIT:
3482 	  if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3483 	    return false;
3484 	  break;
3485 
3486 	/* This relocation describes which C++ vtable entries are actually
3487 	   used.  Record for later use during GC.  */
3488 	case R_CRIS_GNU_VTENTRY:
3489 	  if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3490 	    return false;
3491 	  break;
3492 
3493 	case R_CRIS_16_TPREL:
3494 	case R_CRIS_32_TPREL:
3495 	  /* Already warned above, when necessary.  */
3496 	  break;
3497 
3498 	default:
3499 	  /* Other relocs do not appear here.  */
3500 	  bfd_set_error (bfd_error_bad_value);
3501 	  return false;
3502 	}
3503     }
3504 
3505   return true;
3506 }
3507 
3508 /* Set the sizes of the dynamic sections.  */
3509 
3510 static bool
elf_cris_size_dynamic_sections(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)3511 elf_cris_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
3512 				struct bfd_link_info *info)
3513 {
3514   struct elf_cris_link_hash_table * htab;
3515   bfd *dynobj;
3516   asection *s;
3517   bool relocs;
3518 
3519   htab = elf_cris_hash_table (info);
3520   if (htab == NULL)
3521     return false;
3522 
3523   dynobj = htab->root.dynobj;
3524   BFD_ASSERT (dynobj != NULL);
3525 
3526   if (htab->root.dynamic_sections_created)
3527     {
3528       /* Set the contents of the .interp section to the interpreter.  */
3529       if (bfd_link_executable (info) && !info->nointerp)
3530 	{
3531 	  s = bfd_get_linker_section (dynobj, ".interp");
3532 	  BFD_ASSERT (s != NULL);
3533 	  s->size = sizeof ELF_DYNAMIC_INTERPRETER;
3534 	  s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
3535 	}
3536     }
3537   else
3538     {
3539       /* Adjust all expected GOTPLT uses to use a GOT entry instead.  */
3540       elf_cris_link_hash_traverse (htab, elf_cris_adjust_gotplt_to_got,
3541 				   info);
3542 
3543       /* We may have created entries in the .rela.got section.
3544 	 However, if we are not creating the dynamic sections, we will
3545 	 not actually use these entries.  Reset the size of .rela.got,
3546 	 which will cause it to get stripped from the output file
3547 	 below.  */
3548       s = htab->root.srelgot;
3549       if (s != NULL)
3550 	s->size = 0;
3551     }
3552 
3553   /* If this is a -Bsymbolic shared link, then we need to discard all PC
3554      relative relocs against symbols defined in a regular object.  We
3555      allocated space for them in the check_relocs routine, but we will not
3556      fill them in in the relocate_section routine.  We also discard space
3557      for relocs that have become for local symbols due to symbol
3558      visibility changes.  For programs, we discard space for relocs for
3559      symbols not referenced by any dynamic object.  */
3560   if (bfd_link_pic (info))
3561     elf_cris_link_hash_traverse (htab,
3562 				 elf_cris_discard_excess_dso_dynamics,
3563 				 info);
3564   else
3565     elf_cris_link_hash_traverse (htab,
3566 				 elf_cris_discard_excess_program_dynamics,
3567 				 info);
3568 
3569   /* The check_relocs and adjust_dynamic_symbol entry points have
3570      determined the sizes of the various dynamic sections.  Allocate
3571      memory for them.  */
3572   relocs = false;
3573   for (s = dynobj->sections; s != NULL; s = s->next)
3574     {
3575       const char *name;
3576 
3577       if ((s->flags & SEC_LINKER_CREATED) == 0)
3578 	continue;
3579 
3580       /* It's OK to base decisions on the section name, because none
3581 	 of the dynobj section names depend upon the input files.  */
3582       name = bfd_section_name (s);
3583 
3584       if (strcmp (name, ".plt") == 0)
3585 	{
3586 	  ;
3587 	}
3588       else if (strcmp (name, ".got.plt") == 0)
3589 	{
3590 	  /* The .got.plt contains the .got header as well as the
3591 	     actual .got.plt contents.  The .got header may contain a
3592 	     R_CRIS_DTPMOD entry at index 3.  */
3593 	  s->size += htab->dtpmod_refcount != 0
3594 	    ? 8 : 0;
3595 	}
3596       else if (startswith (name, ".rela"))
3597 	{
3598 	  if (strcmp (name, ".rela.got") == 0
3599 	      && htab->dtpmod_refcount != 0
3600 	      && bfd_link_pic (info))
3601 	    s->size += sizeof (Elf32_External_Rela);
3602 
3603 	  if (s->size != 0)
3604 	    {
3605 	      /* Remember whether there are any reloc sections other
3606 		 than .rela.plt.  */
3607 	      if (strcmp (name, ".rela.plt") != 0)
3608 		  relocs = true;
3609 
3610 	      /* We use the reloc_count field as a counter if we need
3611 		 to copy relocs into the output file.  */
3612 	      s->reloc_count = 0;
3613 	    }
3614 	}
3615       else if (! startswith (name, ".got")
3616 	       && strcmp (name, ".dynbss") != 0
3617 	       && s != htab->root.sdynrelro)
3618 	{
3619 	  /* It's not one of our sections, so don't allocate space.  */
3620 	  continue;
3621 	}
3622 
3623       if (s->size == 0)
3624 	{
3625 	  /* If we don't need this section, strip it from the
3626 	     output file.  This is mostly to handle .rela.bss and
3627 	     .rela.plt.  We must create both sections in
3628 	     create_dynamic_sections, because they must be created
3629 	     before the linker maps input sections to output
3630 	     sections.  The linker does that before
3631 	     adjust_dynamic_symbol is called, and it is that
3632 	     function which decides whether anything needs to go
3633 	     into these sections.  */
3634 	  s->flags |= SEC_EXCLUDE;
3635 	  continue;
3636 	}
3637 
3638       if ((s->flags & SEC_HAS_CONTENTS) == 0)
3639 	continue;
3640 
3641       /* Allocate memory for the section contents. We use bfd_zalloc here
3642 	 in case unused entries are not reclaimed before the section's
3643 	 contents are written out.  This should not happen, but this way
3644 	 if it does, we will not write out garbage.  For reloc sections,
3645 	 this will make entries have the type R_CRIS_NONE.  */
3646       s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3647       if (s->contents == NULL)
3648 	return false;
3649     }
3650 
3651   return _bfd_elf_add_dynamic_tags (output_bfd, info, relocs);
3652 }
3653 
3654 /* This function is called via elf_cris_link_hash_traverse if we are
3655    creating a shared object.  In the -Bsymbolic case, it discards the
3656    space allocated to copy PC relative relocs against symbols which
3657    are defined in regular objects.  For the normal non-symbolic case,
3658    we also discard space for relocs that have become local due to
3659    symbol visibility changes.  We allocated space for them in the
3660    check_relocs routine, but we won't fill them in in the
3661    relocate_section routine.  */
3662 
3663 static bool
elf_cris_discard_excess_dso_dynamics(struct elf_cris_link_hash_entry * h,void * inf)3664 elf_cris_discard_excess_dso_dynamics (struct elf_cris_link_hash_entry *h,
3665 				      void * inf)
3666 {
3667   struct elf_cris_pcrel_relocs_copied *s;
3668   struct bfd_link_info *info = (struct bfd_link_info *) inf;
3669 
3670   /* If a symbol has been forced local or we have found a regular
3671      definition for the symbolic link case, then we won't be needing
3672      any relocs.  */
3673   if (h->root.def_regular
3674       && (h->root.forced_local
3675 	  || SYMBOLIC_BIND (info, &h->root)))
3676     {
3677       for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3678 	{
3679 	  asection *sreloc
3680 	    = _bfd_elf_get_dynamic_reloc_section (elf_hash_table (info)
3681 						  ->dynobj,
3682 						  s->section,
3683 						  /*rela?*/ true);
3684 	  sreloc->size -= s->count * sizeof (Elf32_External_Rela);
3685 	}
3686       return true;
3687     }
3688 
3689   /* If we have accounted for PC-relative relocs for read-only
3690      sections, now is the time to warn for them.  We can't do it in
3691      cris_elf_check_relocs, because we don't know the status of all
3692      symbols at that time (and it's common to force symbols local
3693      late).  */
3694 
3695   for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3696     if ((s->section->flags & SEC_READONLY) != 0)
3697       {
3698 	/* FIXME: How do we make this optionally a warning only?  */
3699 	_bfd_error_handler
3700 	  /* xgettext:c-format */
3701 	  (_("%pB, section `%pA', to symbol `%s':"
3702 	     " relocation %s should not be used"
3703 	     " in a shared object; recompile with -fPIC"),
3704 	   s->section->owner,
3705 	   s->section,
3706 	   h->root.root.root.string,
3707 	   cris_elf_howto_table[s->r_type].name);
3708 
3709 	info->flags |= DF_TEXTREL;
3710       }
3711 
3712   return true;
3713 }
3714 
3715 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3716    creating a shared object.  We discard space for relocs for symbols put
3717    in the .got, but which we found we do not have to resolve at run-time.  */
3718 
3719 static bool
elf_cris_discard_excess_program_dynamics(struct elf_cris_link_hash_entry * h,void * inf)3720 elf_cris_discard_excess_program_dynamics (struct elf_cris_link_hash_entry *h,
3721 					  void * inf)
3722 {
3723   struct bfd_link_info *info = (struct bfd_link_info *) inf;
3724 
3725   /* If we're not creating a shared library and have a symbol which is
3726      referred to by .got references, but the symbol is defined locally,
3727      (or rather, not defined by a DSO) then lose the reloc for the .got
3728      (don't allocate room for it).  Likewise for relocs for something
3729      for which we create a PLT.  */
3730   if (!h->root.def_dynamic
3731       || h->root.plt.refcount > 0)
3732     {
3733       if (h->reg_got_refcount > 0
3734 	  /* The size of this section is only valid and in sync with the
3735 	     various reference counts if we do dynamic; don't decrement it
3736 	     otherwise.  */
3737 	  && elf_hash_table (info)->dynamic_sections_created)
3738 	{
3739 	  bfd *dynobj = elf_hash_table (info)->dynobj;
3740 	  asection *srelgot = elf_hash_table (info)->srelgot;
3741 
3742 	  BFD_ASSERT (dynobj != NULL);
3743 	  BFD_ASSERT (srelgot != NULL);
3744 
3745 	  srelgot->size -= sizeof (Elf32_External_Rela);
3746 	}
3747 
3748       /* If the locally-defined symbol isn't used by a DSO, then we don't
3749 	 have to export it as a dynamic symbol.  This was already done for
3750 	 functions; doing this for all symbols would presumably not
3751 	 introduce new problems.  Of course we don't do this if we're
3752 	 exporting all dynamic symbols, or all data symbols, regardless of
3753 	 them being referenced or not.  */
3754       if (! (info->export_dynamic
3755 	     || (h->root.type != STT_FUNC && info->dynamic_data))
3756 	  && h->root.dynindx != -1
3757 	  && !h->root.dynamic
3758 	  && !h->root.def_dynamic
3759 	  && !h->root.ref_dynamic)
3760 	{
3761 	  h->root.dynindx = -1;
3762 	  _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3763 				  h->root.dynstr_index);
3764 	}
3765     }
3766 
3767   return true;
3768 }
3769 
3770 /* Reject a file depending on presence and expectation of prefixed
3771    underscores on symbols.  */
3772 
3773 static bool
cris_elf_object_p(bfd * abfd)3774 cris_elf_object_p (bfd *abfd)
3775 {
3776   if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
3777     return false;
3778 
3779   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
3780     return (bfd_get_symbol_leading_char (abfd) == '_');
3781   else
3782     return (bfd_get_symbol_leading_char (abfd) == 0);
3783 }
3784 
3785 /* Mark presence or absence of leading underscore.  Set machine type
3786    flags from mach type.  */
3787 
3788 static bool
cris_elf_final_write_processing(bfd * abfd)3789 cris_elf_final_write_processing (bfd *abfd)
3790 {
3791   unsigned long e_flags = elf_elfheader (abfd)->e_flags;
3792 
3793   e_flags &= ~EF_CRIS_UNDERSCORE;
3794   if (bfd_get_symbol_leading_char (abfd) == '_')
3795     e_flags |= EF_CRIS_UNDERSCORE;
3796 
3797   switch (bfd_get_mach (abfd))
3798     {
3799     case bfd_mach_cris_v0_v10:
3800       e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
3801       break;
3802 
3803     case bfd_mach_cris_v10_v32:
3804       e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
3805       break;
3806 
3807     case bfd_mach_cris_v32:
3808       e_flags |= EF_CRIS_VARIANT_V32;
3809       break;
3810 
3811     default:
3812       _bfd_abort (__FILE__, __LINE__,
3813 		  _("unexpected machine number"));
3814     }
3815 
3816   elf_elfheader (abfd)->e_flags = e_flags;
3817   return _bfd_elf_final_write_processing (abfd);
3818 }
3819 
3820 /* Set the mach type from e_flags value.  */
3821 
3822 static bool
cris_elf_set_mach_from_flags(bfd * abfd,unsigned long flags)3823 cris_elf_set_mach_from_flags (bfd *abfd,
3824 			      unsigned long flags)
3825 {
3826   switch (flags & EF_CRIS_VARIANT_MASK)
3827     {
3828     case EF_CRIS_VARIANT_ANY_V0_V10:
3829       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
3830       break;
3831 
3832     case EF_CRIS_VARIANT_V32:
3833       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
3834       break;
3835 
3836     case EF_CRIS_VARIANT_COMMON_V10_V32:
3837       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
3838       break;
3839 
3840     default:
3841       /* Since we don't recognize them, we obviously can't support them
3842 	 with this code; we'd have to require that all future handling
3843 	 would be optional.  */
3844       bfd_set_error (bfd_error_wrong_format);
3845       return false;
3846     }
3847 
3848   return true;
3849 }
3850 
3851 /* Display the flags field.  */
3852 
3853 static bool
cris_elf_print_private_bfd_data(bfd * abfd,void * ptr)3854 cris_elf_print_private_bfd_data (bfd *abfd, void * ptr)
3855 {
3856   FILE *file = (FILE *) ptr;
3857 
3858   BFD_ASSERT (abfd != NULL && ptr != NULL);
3859 
3860   _bfd_elf_print_private_bfd_data (abfd, ptr);
3861 
3862   fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3863 
3864   if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
3865     fprintf (file, _(" [symbols have a _ prefix]"));
3866   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3867       == EF_CRIS_VARIANT_COMMON_V10_V32)
3868     fprintf (file, _(" [v10 and v32]"));
3869   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3870       == EF_CRIS_VARIANT_V32)
3871     fprintf (file, _(" [v32]"));
3872 
3873   fputc ('\n', file);
3874   return true;
3875 }
3876 
3877 /* Don't mix files with and without a leading underscore.  */
3878 
3879 static bool
cris_elf_merge_private_bfd_data(bfd * ibfd,struct bfd_link_info * info)3880 cris_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3881 {
3882   bfd *obfd = info->output_bfd;
3883   int imach, omach;
3884 
3885   if (! _bfd_generic_verify_endian_match (ibfd, info))
3886     return false;
3887 
3888   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3889       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3890     return true;
3891 
3892   imach = bfd_get_mach (ibfd);
3893 
3894   if (! elf_flags_init (obfd))
3895     {
3896       /* This happens when ld starts out with a 'blank' output file.  */
3897       elf_flags_init (obfd) = true;
3898 
3899       /* We ignore the linker-set mach, and instead set it according to
3900 	 the first input file.  This would also happen if we could
3901 	 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
3902 	 This allows us to keep the same linker config across
3903 	 cris(v0..v10) and crisv32.  The drawback is that we can't force
3904 	 the output type, which might be a sane thing to do for a
3905 	 v10+v32 compatibility object.  */
3906       if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3907 	return false;
3908     }
3909 
3910   if (bfd_get_symbol_leading_char (ibfd)
3911       != bfd_get_symbol_leading_char (obfd))
3912     {
3913       _bfd_error_handler
3914 	(bfd_get_symbol_leading_char (ibfd) == '_'
3915 	 ? _("%pB: uses _-prefixed symbols, but writing file with non-prefixed symbols")
3916 	 : _("%pB: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
3917 	 ibfd);
3918       bfd_set_error (bfd_error_bad_value);
3919       return false;
3920     }
3921 
3922   omach = bfd_get_mach (obfd);
3923 
3924   if (imach != omach)
3925     {
3926       /* We can get an incompatible combination only if either is
3927 	 bfd_mach_cris_v32, and the other one isn't compatible.  */
3928       if ((imach == bfd_mach_cris_v32
3929 	   && omach != bfd_mach_cris_v10_v32)
3930 	  || (omach == bfd_mach_cris_v32
3931 	      && imach != bfd_mach_cris_v10_v32))
3932 	{
3933 	  _bfd_error_handler
3934 	    ((imach == bfd_mach_cris_v32)
3935 	     ? _("%pB contains CRIS v32 code, incompatible"
3936 		 " with previous objects")
3937 	     : _("%pB contains non-CRIS-v32 code, incompatible"
3938 		 " with previous objects"),
3939 	     ibfd);
3940 	  bfd_set_error (bfd_error_bad_value);
3941 	  return false;
3942 	}
3943 
3944       /* We don't have to check the case where the input is compatible
3945 	 with v10 and v32, because the output is already known to be set
3946 	 to the other (compatible) mach.  */
3947       if (omach == bfd_mach_cris_v10_v32
3948 	  && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3949 	return false;
3950     }
3951 
3952   return true;
3953 }
3954 
3955 /* Do side-effects of e_flags copying to obfd.  */
3956 
3957 static bool
cris_elf_copy_private_bfd_data(bfd * ibfd,bfd * obfd)3958 cris_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
3959 {
3960   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3961       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3962     return true;
3963 
3964   /* Call the base function.  */
3965   if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
3966     return false;
3967 
3968   /* Do what we really came here for.  */
3969   return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
3970 }
3971 
3972 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)3973 elf_cris_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3974 			   const asection *rel_sec ATTRIBUTE_UNUSED,
3975 			   const Elf_Internal_Rela *rela)
3976 {
3977   enum elf_cris_reloc_type r_type = ELF32_R_TYPE (rela->r_info);
3978   switch (r_type)
3979     {
3980     case R_CRIS_RELATIVE:
3981       return reloc_class_relative;
3982     case R_CRIS_JUMP_SLOT:
3983       return reloc_class_plt;
3984     case R_CRIS_COPY:
3985       return reloc_class_copy;
3986     default:
3987       return reloc_class_normal;
3988     }
3989 }
3990 
3991 /* The elf_backend_got_elt_size worker.  For one symbol, we can have up to
3992    two GOT entries from three types with two different sizes.  We handle
3993    it as a single entry, so we can use the regular offset-calculation
3994    machinery.  */
3995 
3996 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)3997 elf_cris_got_elt_size (bfd *abfd ATTRIBUTE_UNUSED,
3998 		       struct bfd_link_info *info ATTRIBUTE_UNUSED,
3999 		       struct elf_link_hash_entry *hr,
4000 		       bfd *ibfd,
4001 		       unsigned long symndx)
4002 {
4003   struct elf_link_hash_entry *h = (struct elf_link_hash_entry *) hr;
4004   bfd_vma eltsiz = 0;
4005 
4006   /* We may have one regular GOT entry or up to two TLS GOT
4007      entries.  */
4008   if (h == NULL)
4009     {
4010       Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4011       bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (ibfd);
4012 
4013       BFD_ASSERT (local_got_refcounts != NULL);
4014 
4015       if (local_got_refcounts[LGOT_REG_NDX (symndx)] > 0)
4016 	{
4017 	  /* We can't have a variable referred to both as a regular
4018 	     variable and through TLS relocs.  */
4019 	  BFD_ASSERT (local_got_refcounts[LGOT_DTP_NDX (symndx)] == 0
4020 		      && local_got_refcounts[LGOT_TPREL_NDX (symndx)] == 0);
4021 	  return 4;
4022 	}
4023 
4024       if (local_got_refcounts[LGOT_DTP_NDX (symndx)] > 0)
4025 	eltsiz += 8;
4026 
4027       if (local_got_refcounts[LGOT_TPREL_NDX (symndx)] > 0)
4028 	eltsiz += 4;
4029     }
4030   else
4031     {
4032       struct elf_cris_link_hash_entry *hh = elf_cris_hash_entry (h);
4033       if (hh->reg_got_refcount > 0)
4034 	{
4035 	  /* The actual error-on-input is emitted elsewhere.  */
4036 	  BFD_ASSERT (hh->dtp_refcount == 0 && hh->tprel_refcount == 0);
4037 	  return 4;
4038 	}
4039 
4040       if (hh->dtp_refcount > 0)
4041 	eltsiz += 8;
4042 
4043       if (hh->tprel_refcount > 0)
4044 	eltsiz += 4;
4045     }
4046 
4047   /* We're only called when h->got.refcount is non-zero, so we must
4048      have a non-zero size.  */
4049   BFD_ASSERT (eltsiz != 0);
4050   return eltsiz;
4051 }
4052 
4053 #define ELF_ARCH		bfd_arch_cris
4054 #define ELF_TARGET_ID		CRIS_ELF_DATA
4055 #define ELF_MACHINE_CODE	EM_CRIS
4056 #define ELF_MAXPAGESIZE		0x2000
4057 
4058 #define TARGET_LITTLE_SYM	cris_elf32_vec
4059 #define TARGET_LITTLE_NAME	"elf32-cris"
4060 #define elf_symbol_leading_char 0
4061 
4062 #define elf_info_to_howto_rel			NULL
4063 #define elf_info_to_howto			cris_info_to_howto_rela
4064 #define elf_backend_relocate_section		cris_elf_relocate_section
4065 #define elf_backend_gc_mark_hook		cris_elf_gc_mark_hook
4066 #define elf_backend_plt_sym_val			cris_elf_plt_sym_val
4067 #define elf_backend_check_relocs		cris_elf_check_relocs
4068 #define elf_backend_grok_prstatus		cris_elf_grok_prstatus
4069 #define elf_backend_grok_psinfo			cris_elf_grok_psinfo
4070 
4071 #define elf_backend_can_gc_sections		1
4072 #define elf_backend_can_refcount		1
4073 
4074 #define elf_backend_object_p			cris_elf_object_p
4075 #define elf_backend_final_write_processing \
4076 	cris_elf_final_write_processing
4077 #define bfd_elf32_bfd_print_private_bfd_data \
4078 	cris_elf_print_private_bfd_data
4079 #define bfd_elf32_bfd_merge_private_bfd_data \
4080 	cris_elf_merge_private_bfd_data
4081 #define bfd_elf32_bfd_copy_private_bfd_data \
4082 	cris_elf_copy_private_bfd_data
4083 
4084 #define bfd_elf32_bfd_reloc_type_lookup		cris_reloc_type_lookup
4085 #define bfd_elf32_bfd_reloc_name_lookup	cris_reloc_name_lookup
4086 
4087 #define bfd_elf32_bfd_link_hash_table_create \
4088 	elf_cris_link_hash_table_create
4089 #define elf_backend_adjust_dynamic_symbol \
4090 	elf_cris_adjust_dynamic_symbol
4091 #define elf_backend_copy_indirect_symbol \
4092 	elf_cris_copy_indirect_symbol
4093 #define elf_backend_size_dynamic_sections \
4094 	elf_cris_size_dynamic_sections
4095 #define elf_backend_init_index_section		_bfd_elf_init_1_index_section
4096 #define elf_backend_finish_dynamic_symbol \
4097 	elf_cris_finish_dynamic_symbol
4098 #define elf_backend_finish_dynamic_sections \
4099 	elf_cris_finish_dynamic_sections
4100 #define elf_backend_create_dynamic_sections \
4101 	_bfd_elf_create_dynamic_sections
4102 #define bfd_elf32_bfd_final_link \
4103 	bfd_elf_gc_common_final_link
4104 #define elf_backend_hide_symbol			elf_cris_hide_symbol
4105 #define elf_backend_reloc_type_class		elf_cris_reloc_type_class
4106 
4107 #define elf_backend_want_got_plt	1
4108 #define elf_backend_plt_readonly	1
4109 #define elf_backend_want_plt_sym	0
4110 #define elf_backend_got_header_size	12
4111 #define elf_backend_got_elt_size elf_cris_got_elt_size
4112 #define elf_backend_dtrel_excludes_plt	1
4113 #define elf_backend_want_dynrelro	1
4114 
4115 /* Later, we my want to optimize RELA entries into REL entries for dynamic
4116    linking and libraries (if it's a win of any significance).  Until then,
4117    take the easy route.  */
4118 #define elf_backend_may_use_rel_p 0
4119 #define elf_backend_may_use_rela_p 1
4120 #define elf_backend_rela_normal		1
4121 
4122 #define elf_backend_linux_prpsinfo32_ugid16	true
4123 
4124 #include "elf32-target.h"
4125 
4126 #undef TARGET_LITTLE_SYM
4127 #undef TARGET_LITTLE_NAME
4128 #undef elf_symbol_leading_char
4129 
4130 #define TARGET_LITTLE_SYM cris_elf32_us_vec
4131 #define TARGET_LITTLE_NAME "elf32-us-cris"
4132 #define elf_symbol_leading_char '_'
4133 #undef elf32_bed
4134 #define elf32_bed elf32_us_cris_bed
4135 
4136 #include "elf32-target.h"
4137