1 /* IBM S/390-specific support for 32-bit ELF
2    Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
3    2011, 2012 Free Software Foundation, Inc.
4    Contributed by Carl B. Pedersen and Martin Schwidefsky.
5 
6    This file is part of BFD, the Binary File Descriptor library.
7 
8    This program is free software; you can redistribute it and/or modify
9    it under the terms of the GNU General Public License as published by
10    the Free Software Foundation; either version 3 of the License, or
11    (at your option) any later version.
12 
13    This program is distributed in the hope that it will be useful,
14    but WITHOUT ANY WARRANTY; without even the implied warranty of
15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16    GNU General Public License for more details.
17 
18    You should have received a copy of the GNU General Public License
19    along with this program; if not, write to the Free Software
20    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
21    02110-1301, USA.  */
22 
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "bfdlink.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28 #include "elf/s390.h"
29 
30 static bfd_reloc_status_type
31 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
32 		asection *, bfd *, char **);
33 static bfd_reloc_status_type
34 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
35 		      asection *, bfd *, char **);
36 
37 /* The relocation "howto" table.  */
38 
39 static reloc_howto_type elf_howto_table[] =
40 {
41   HOWTO (R_390_NONE,		/* type */
42 	 0,			/* rightshift */
43 	 0,			/* 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_390_NONE",		/* name */
50 	 FALSE,			/* partial_inplace */
51 	 0,			/* src_mask */
52 	 0,			/* dst_mask */
53 	 FALSE),		/* pcrel_offset */
54 
55   HOWTO(R_390_8,         0, 0,  8, FALSE, 0, complain_overflow_bitfield,
56 	bfd_elf_generic_reloc, "R_390_8",        FALSE, 0,0x000000ff, FALSE),
57   HOWTO(R_390_12,        0, 1, 12, FALSE, 0, complain_overflow_dont,
58 	bfd_elf_generic_reloc, "R_390_12",       FALSE, 0,0x00000fff, FALSE),
59   HOWTO(R_390_16,        0, 1, 16, FALSE, 0, complain_overflow_bitfield,
60 	bfd_elf_generic_reloc, "R_390_16",       FALSE, 0,0x0000ffff, FALSE),
61   HOWTO(R_390_32,        0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 	bfd_elf_generic_reloc, "R_390_32",       FALSE, 0,0xffffffff, FALSE),
63   HOWTO(R_390_PC32,	 0, 2, 32,  TRUE, 0, complain_overflow_bitfield,
64 	bfd_elf_generic_reloc, "R_390_PC32",     FALSE, 0,0xffffffff, TRUE),
65   HOWTO(R_390_GOT12,	 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
66 	bfd_elf_generic_reloc, "R_390_GOT12",    FALSE, 0,0x00000fff, FALSE),
67   HOWTO(R_390_GOT32,	 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
68 	bfd_elf_generic_reloc, "R_390_GOT32",    FALSE, 0,0xffffffff, FALSE),
69   HOWTO(R_390_PLT32,	 0, 2, 32,  TRUE, 0, complain_overflow_bitfield,
70 	bfd_elf_generic_reloc, "R_390_PLT32",    FALSE, 0,0xffffffff, TRUE),
71   HOWTO(R_390_COPY,      0, 2, 32, FALSE, 0, complain_overflow_bitfield,
72 	bfd_elf_generic_reloc, "R_390_COPY",     FALSE, 0,0xffffffff, FALSE),
73   HOWTO(R_390_GLOB_DAT,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
74 	bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
75   HOWTO(R_390_JMP_SLOT,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
76 	bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
77   HOWTO(R_390_RELATIVE,  0, 2, 32,  TRUE, 0, complain_overflow_bitfield,
78 	bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
79   HOWTO(R_390_GOTOFF32,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
80 	bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
81   HOWTO(R_390_GOTPC,     0, 2, 32,  TRUE, 0, complain_overflow_bitfield,
82 	bfd_elf_generic_reloc, "R_390_GOTPC",    FALSE, 0,0xffffffff, TRUE),
83   HOWTO(R_390_GOT16,     0, 1, 16, FALSE, 0, complain_overflow_bitfield,
84 	bfd_elf_generic_reloc, "R_390_GOT16",    FALSE, 0,0x0000ffff, FALSE),
85   HOWTO(R_390_PC16,      0, 1, 16,  TRUE, 0, complain_overflow_bitfield,
86 	bfd_elf_generic_reloc, "R_390_PC16",     FALSE, 0,0x0000ffff, TRUE),
87   HOWTO(R_390_PC16DBL,   1, 1, 16,  TRUE, 0, complain_overflow_bitfield,
88 	bfd_elf_generic_reloc, "R_390_PC16DBL",  FALSE, 0,0x0000ffff, TRUE),
89   HOWTO(R_390_PLT16DBL,  1, 1, 16,  TRUE, 0, complain_overflow_bitfield,
90 	bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
91   HOWTO(R_390_PC32DBL,	 1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
92 	bfd_elf_generic_reloc, "R_390_PC32DBL",  FALSE, 0,0xffffffff, TRUE),
93   HOWTO(R_390_PLT32DBL,	 1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
94 	bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
95   HOWTO(R_390_GOTPCDBL,  1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
96 	bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
97   EMPTY_HOWTO (R_390_64),	/* Empty entry for R_390_64.  */
98   EMPTY_HOWTO (R_390_PC64),	/* Empty entry for R_390_PC64.  */
99   EMPTY_HOWTO (R_390_GOT64),	/* Empty entry for R_390_GOT64.  */
100   EMPTY_HOWTO (R_390_PLT64),	/* Empty entry for R_390_PLT64.  */
101   HOWTO(R_390_GOTENT,	 1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
102 	bfd_elf_generic_reloc, "R_390_GOTENT",   FALSE, 0,0xffffffff, TRUE),
103   HOWTO(R_390_GOTOFF16,  0, 1, 16, FALSE, 0, complain_overflow_bitfield,
104 	bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
105   EMPTY_HOWTO (R_390_GOTOFF64),	/* Empty entry for R_390_GOTOFF64.  */
106   HOWTO(R_390_GOTPLT12,  0, 1, 12, FALSE, 0, complain_overflow_dont,
107 	bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
108   HOWTO(R_390_GOTPLT16,  0, 1, 16, FALSE, 0, complain_overflow_bitfield,
109 	bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
110   HOWTO(R_390_GOTPLT32,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
111 	bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
112   EMPTY_HOWTO (R_390_GOTPLT64),	/* Empty entry for R_390_GOTPLT64.  */
113   HOWTO(R_390_GOTPLTENT, 1, 2, 32,  TRUE, 0, complain_overflow_bitfield,
114 	bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
115   HOWTO(R_390_PLTOFF16,  0, 1, 16, FALSE, 0, complain_overflow_bitfield,
116 	bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
117   HOWTO(R_390_PLTOFF32,  0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 	bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
119   EMPTY_HOWTO (R_390_PLTOFF64),	/* Empty entry for R_390_PLTOFF64.  */
120   HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
121 	s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
122   HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
123 	s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
124   HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
125 	s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
126   HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 	bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
128   EMPTY_HOWTO (R_390_TLS_GD64),	/* Empty entry for R_390_TLS_GD64.  */
129   HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
130 	bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
131   HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 	bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
133   EMPTY_HOWTO (R_390_TLS_GOTIE64),	/* Empty entry for R_390_TLS_GOTIE64.  */
134   HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
135 	bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
136   EMPTY_HOWTO (R_390_TLS_LDM64),	/* Empty entry for R_390_TLS_LDM64.  */
137   HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 	bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
139   EMPTY_HOWTO (R_390_TLS_IE64),	/* Empty entry for R_390_TLS_IE64.  */
140   HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
141 	bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
142   HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
143 	bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
144   EMPTY_HOWTO (R_390_TLS_LE64),	/* Empty entry for R_390_TLS_LE64.  */
145   HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
146 	bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
147   EMPTY_HOWTO (R_390_TLS_LDO64),	/* Empty entry for R_390_TLS_LDO64.  */
148   HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
149 	bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
150   HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
151 	bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
152   HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
153 	bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
154   HOWTO(R_390_20,        0, 2, 20, FALSE, 8, complain_overflow_dont,
155 	s390_elf_ldisp_reloc, "R_390_20",      FALSE, 0,0x0fffff00, FALSE),
156   HOWTO(R_390_GOT20,	 0, 2, 20, FALSE, 8, complain_overflow_dont,
157 	s390_elf_ldisp_reloc, "R_390_GOT20",   FALSE, 0,0x0fffff00, FALSE),
158   HOWTO(R_390_GOTPLT20,  0, 2, 20, FALSE, 8, complain_overflow_dont,
159 	s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
160   HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
161 	s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
162   HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
163 	bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE),
164 };
165 
166 /* GNU extension to record C++ vtable hierarchy.  */
167 static reloc_howto_type elf32_s390_vtinherit_howto =
168   HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
169 static reloc_howto_type elf32_s390_vtentry_howto =
170   HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
171 
172 static reloc_howto_type *
elf_s390_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)173 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
174 			    bfd_reloc_code_real_type code)
175 {
176   switch (code)
177     {
178     case BFD_RELOC_NONE:
179       return &elf_howto_table[(int) R_390_NONE];
180     case BFD_RELOC_8:
181       return &elf_howto_table[(int) R_390_8];
182     case BFD_RELOC_390_12:
183       return &elf_howto_table[(int) R_390_12];
184     case BFD_RELOC_16:
185       return &elf_howto_table[(int) R_390_16];
186     case BFD_RELOC_32:
187       return &elf_howto_table[(int) R_390_32];
188     case BFD_RELOC_CTOR:
189       return &elf_howto_table[(int) R_390_32];
190     case BFD_RELOC_32_PCREL:
191       return &elf_howto_table[(int) R_390_PC32];
192     case BFD_RELOC_390_GOT12:
193       return &elf_howto_table[(int) R_390_GOT12];
194     case BFD_RELOC_32_GOT_PCREL:
195       return &elf_howto_table[(int) R_390_GOT32];
196     case BFD_RELOC_390_PLT32:
197       return &elf_howto_table[(int) R_390_PLT32];
198     case BFD_RELOC_390_COPY:
199       return &elf_howto_table[(int) R_390_COPY];
200     case BFD_RELOC_390_GLOB_DAT:
201       return &elf_howto_table[(int) R_390_GLOB_DAT];
202     case BFD_RELOC_390_JMP_SLOT:
203       return &elf_howto_table[(int) R_390_JMP_SLOT];
204     case BFD_RELOC_390_RELATIVE:
205       return &elf_howto_table[(int) R_390_RELATIVE];
206     case BFD_RELOC_32_GOTOFF:
207       return &elf_howto_table[(int) R_390_GOTOFF32];
208     case BFD_RELOC_390_GOTPC:
209       return &elf_howto_table[(int) R_390_GOTPC];
210     case BFD_RELOC_390_GOT16:
211       return &elf_howto_table[(int) R_390_GOT16];
212     case BFD_RELOC_16_PCREL:
213       return &elf_howto_table[(int) R_390_PC16];
214     case BFD_RELOC_390_PC16DBL:
215       return &elf_howto_table[(int) R_390_PC16DBL];
216     case BFD_RELOC_390_PLT16DBL:
217       return &elf_howto_table[(int) R_390_PLT16DBL];
218     case BFD_RELOC_390_PC32DBL:
219       return &elf_howto_table[(int) R_390_PC32DBL];
220     case BFD_RELOC_390_PLT32DBL:
221       return &elf_howto_table[(int) R_390_PLT32DBL];
222     case BFD_RELOC_390_GOTPCDBL:
223       return &elf_howto_table[(int) R_390_GOTPCDBL];
224     case BFD_RELOC_390_GOTENT:
225       return &elf_howto_table[(int) R_390_GOTENT];
226     case BFD_RELOC_16_GOTOFF:
227       return &elf_howto_table[(int) R_390_GOTOFF16];
228     case BFD_RELOC_390_GOTPLT12:
229       return &elf_howto_table[(int) R_390_GOTPLT12];
230     case BFD_RELOC_390_GOTPLT16:
231       return &elf_howto_table[(int) R_390_GOTPLT16];
232     case BFD_RELOC_390_GOTPLT32:
233       return &elf_howto_table[(int) R_390_GOTPLT32];
234     case BFD_RELOC_390_GOTPLTENT:
235       return &elf_howto_table[(int) R_390_GOTPLTENT];
236     case BFD_RELOC_390_PLTOFF16:
237       return &elf_howto_table[(int) R_390_PLTOFF16];
238     case BFD_RELOC_390_PLTOFF32:
239       return &elf_howto_table[(int) R_390_PLTOFF32];
240     case BFD_RELOC_390_TLS_LOAD:
241       return &elf_howto_table[(int) R_390_TLS_LOAD];
242     case BFD_RELOC_390_TLS_GDCALL:
243       return &elf_howto_table[(int) R_390_TLS_GDCALL];
244     case BFD_RELOC_390_TLS_LDCALL:
245       return &elf_howto_table[(int) R_390_TLS_LDCALL];
246     case BFD_RELOC_390_TLS_GD32:
247       return &elf_howto_table[(int) R_390_TLS_GD32];
248     case BFD_RELOC_390_TLS_GOTIE12:
249       return &elf_howto_table[(int) R_390_TLS_GOTIE12];
250     case BFD_RELOC_390_TLS_GOTIE32:
251       return &elf_howto_table[(int) R_390_TLS_GOTIE32];
252     case BFD_RELOC_390_TLS_LDM32:
253       return &elf_howto_table[(int) R_390_TLS_LDM32];
254     case BFD_RELOC_390_TLS_IE32:
255       return &elf_howto_table[(int) R_390_TLS_IE32];
256     case BFD_RELOC_390_TLS_IEENT:
257       return &elf_howto_table[(int) R_390_TLS_IEENT];
258     case BFD_RELOC_390_TLS_LE32:
259       return &elf_howto_table[(int) R_390_TLS_LE32];
260     case BFD_RELOC_390_TLS_LDO32:
261       return &elf_howto_table[(int) R_390_TLS_LDO32];
262     case BFD_RELOC_390_TLS_DTPMOD:
263       return &elf_howto_table[(int) R_390_TLS_DTPMOD];
264     case BFD_RELOC_390_TLS_DTPOFF:
265       return &elf_howto_table[(int) R_390_TLS_DTPOFF];
266     case BFD_RELOC_390_TLS_TPOFF:
267       return &elf_howto_table[(int) R_390_TLS_TPOFF];
268     case BFD_RELOC_390_20:
269       return &elf_howto_table[(int) R_390_20];
270     case BFD_RELOC_390_GOT20:
271       return &elf_howto_table[(int) R_390_GOT20];
272     case BFD_RELOC_390_GOTPLT20:
273       return &elf_howto_table[(int) R_390_GOTPLT20];
274     case BFD_RELOC_390_TLS_GOTIE20:
275       return &elf_howto_table[(int) R_390_TLS_GOTIE20];
276     case BFD_RELOC_390_IRELATIVE:
277       return &elf_howto_table[(int) R_390_IRELATIVE];
278     case BFD_RELOC_VTABLE_INHERIT:
279       return &elf32_s390_vtinherit_howto;
280     case BFD_RELOC_VTABLE_ENTRY:
281       return &elf32_s390_vtentry_howto;
282     default:
283       break;
284     }
285   return 0;
286 }
287 
288 static reloc_howto_type *
elf_s390_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)289 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
290 			    const char *r_name)
291 {
292   unsigned int i;
293 
294   for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
295     if (elf_howto_table[i].name != NULL
296 	&& strcasecmp (elf_howto_table[i].name, r_name) == 0)
297       return &elf_howto_table[i];
298 
299   if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
300     return &elf32_s390_vtinherit_howto;
301   if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
302     return &elf32_s390_vtentry_howto;
303 
304   return NULL;
305 }
306 
307 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
308    and elf32-s390.c has its own copy.  */
309 
310 static void
elf_s390_info_to_howto(bfd * abfd ATTRIBUTE_UNUSED,arelent * cache_ptr,Elf_Internal_Rela * dst)311 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
312 			arelent *cache_ptr,
313 			Elf_Internal_Rela *dst)
314 {
315   unsigned int r_type = ELF32_R_TYPE(dst->r_info);
316   switch (r_type)
317     {
318     case R_390_GNU_VTINHERIT:
319       cache_ptr->howto = &elf32_s390_vtinherit_howto;
320       break;
321 
322     case R_390_GNU_VTENTRY:
323       cache_ptr->howto = &elf32_s390_vtentry_howto;
324       break;
325 
326     default:
327       if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
328 	{
329 	  (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
330 				 abfd, (int) r_type);
331 	  r_type = R_390_NONE;
332 	}
333       cache_ptr->howto = &elf_howto_table[r_type];
334     }
335 }
336 
337 /* A relocation function which doesn't do anything.  */
338 static bfd_reloc_status_type
s390_tls_reloc(bfd * abfd ATTRIBUTE_UNUSED,arelent * reloc_entry,asymbol * symbol ATTRIBUTE_UNUSED,void * data ATTRIBUTE_UNUSED,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)339 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
340 		arelent *reloc_entry,
341 		asymbol *symbol ATTRIBUTE_UNUSED,
342 		void * data ATTRIBUTE_UNUSED,
343 		asection *input_section,
344 		bfd *output_bfd,
345 		char **error_message ATTRIBUTE_UNUSED)
346 {
347   if (output_bfd)
348     reloc_entry->address += input_section->output_offset;
349   return bfd_reloc_ok;
350 }
351 
352 /* Handle the large displacement relocs.  */
353 static bfd_reloc_status_type
s390_elf_ldisp_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)354 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
355 		      arelent *reloc_entry,
356 		      asymbol *symbol,
357 		      void * data ATTRIBUTE_UNUSED,
358 		      asection *input_section,
359 		      bfd *output_bfd,
360 		      char **error_message ATTRIBUTE_UNUSED)
361 {
362   reloc_howto_type *howto = reloc_entry->howto;
363   bfd_vma relocation;
364   bfd_vma insn;
365 
366   if (output_bfd != (bfd *) NULL
367       && (symbol->flags & BSF_SECTION_SYM) == 0
368       && (! howto->partial_inplace
369 	  || reloc_entry->addend == 0))
370     {
371       reloc_entry->address += input_section->output_offset;
372       return bfd_reloc_ok;
373     }
374 
375   if (output_bfd != NULL)
376     return bfd_reloc_continue;
377 
378   if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
379     return bfd_reloc_outofrange;
380 
381   relocation = (symbol->value
382 		+ symbol->section->output_section->vma
383 		+ symbol->section->output_offset);
384   relocation += reloc_entry->addend;
385   if (howto->pc_relative)
386     {
387       relocation -= (input_section->output_section->vma
388 		     + input_section->output_offset);
389       relocation -= reloc_entry->address;
390     }
391 
392   insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
393   insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
394   bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
395 
396   if ((bfd_signed_vma) relocation < - 0x80000
397       || (bfd_signed_vma) relocation > 0x7ffff)
398     return bfd_reloc_overflow;
399   else
400     return bfd_reloc_ok;
401 }
402 
403 static bfd_boolean
elf_s390_is_local_label_name(bfd * abfd,const char * name)404 elf_s390_is_local_label_name (bfd *abfd, const char *name)
405 {
406   if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
407     return TRUE;
408 
409   return _bfd_elf_is_local_label_name (abfd, name);
410 }
411 
412 /* Functions for the 390 ELF linker.  */
413 
414 /* The name of the dynamic interpreter.  This is put in the .interp
415    section.  */
416 
417 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
418 
419 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
420    copying dynamic variables from a shared lib into an app's dynbss
421    section, and instead use a dynamic relocation to point into the
422    shared lib.  */
423 #define ELIMINATE_COPY_RELOCS 1
424 
425 /* The size in bytes of the first entry in the procedure linkage table.  */
426 #define PLT_FIRST_ENTRY_SIZE 32
427 /* The size in bytes of an entry in the procedure linkage table.  */
428 #define PLT_ENTRY_SIZE 32
429 
430 #define GOT_ENTRY_SIZE 4
431 
432 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
433 
434 /* The first three entries in a procedure linkage table are reserved,
435    and the initial contents are unimportant (we zero them out).
436    Subsequent entries look like this.  See the SVR4 ABI 386
437    supplement to see how this works.  */
438 
439 /* For the s390, simple addr offset can only be 0 - 4096.
440    To use the full 2 GB address space, several instructions
441    are needed to load an address in a register and execute
442    a branch( or just saving the address)
443 
444    Furthermore, only r 0 and 1 are free to use!!!  */
445 
446 /* The first 3 words in the GOT are then reserved.
447    Word 0 is the address of the dynamic table.
448    Word 1 is a pointer to a structure describing the object
449    Word 2 is used to point to the loader entry address.
450 
451    The code for position independent PLT entries looks like this:
452 
453    r12 holds addr of the current GOT at entry to the PLT
454 
455    The GOT holds the address in the PLT to be executed.
456    The loader then gets:
457    24(15) =  Pointer to the structure describing the object.
458    28(15) =  Offset into rela.plt
459 
460    The loader  must  then find the module where the function is
461    and insert the address in the GOT.
462 
463   Note: 390 can only address +- 64 K relative.
464         We check if offset > 65536, then make a relative branch -64xxx
465         back to a previous defined branch
466 
467 PLT1: BASR 1,0         # 2 bytes
468       L    1,22(1)     # 4 bytes  Load offset in GOT in r 1
469       L    1,(1,12)    # 4 bytes  Load address from GOT in r1
470       BCR  15,1        # 2 bytes  Jump to address
471 RET1: BASR 1,0         # 2 bytes  Return from GOT 1st time
472       L    1,14(1)     # 4 bytes  Load offset in symol table in r1
473       BRC  15,-x       # 4 bytes  Jump to start of PLT
474       .word 0          # 2 bytes filler
475       .long ?          # 4 bytes  offset in GOT
476       .long ?          # 4 bytes  offset into rela.plt
477 
478   This was the general case. There are two additional, optimizes PLT
479   definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
480   First the one for GOT offsets < 4096:
481 
482 PLT1: L    1,<offset>(12) # 4 bytes  Load address from GOT in R1
483       BCR  15,1           # 2 bytes  Jump to address
484       .word 0,0,0         # 6 bytes  filler
485 RET1: BASR 1,0            # 2 bytes  Return from GOT 1st time
486       L    1,14(1)        # 4 bytes  Load offset in rela.plt in r1
487       BRC  15,-x          # 4 bytes  Jump to start of PLT
488       .word 0,0,0         # 6 bytes  filler
489       .long ?             # 4 bytes  offset into rela.plt
490 
491   Second the one for GOT offsets < 32768:
492 
493 PLT1: LHI  1,<offset>     # 4 bytes  Load offset in GOT to r1
494       L    1,(1,12)       # 4 bytes  Load address from GOT to r1
495       BCR  15,1           # 2 bytes  Jump to address
496       .word 0             # 2 bytes  filler
497 RET1: BASR 1,0            # 2 bytes  Return from GOT 1st time
498       L    1,14(1)        # 4 bytes  Load offset in rela.plt in r1
499       BRC  15,-x          # 4 bytes  Jump to start of PLT
500       .word 0,0,0         # 6 bytes  filler
501       .long ?             # 4 bytes  offset into rela.plt
502 
503 Total = 32 bytes per PLT entry
504 
505    The code for static build PLT entries looks like this:
506 
507 PLT1: BASR 1,0         # 2 bytes
508       L    1,22(1)     # 4 bytes  Load address of GOT entry
509       L    1,0(0,1)    # 4 bytes  Load address from GOT in r1
510       BCR  15,1        # 2 bytes  Jump to address
511 RET1: BASR 1,0         # 2 bytes  Return from GOT 1st time
512       L    1,14(1)     # 4 bytes  Load offset in symbol table in r1
513       BRC  15,-x       # 4 bytes  Jump to start of PLT
514       .word 0          # 2 bytes  filler
515       .long ?          # 4 bytes  address of GOT entry
516       .long ?          # 4 bytes  offset into rela.plt  */
517 
518 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
519   {
520     0x0d, 0x10,                             /* basr    %r1,%r0     */
521     0x58, 0x10, 0x10, 0x16,                 /* l       %r1,22(%r1) */
522     0x58, 0x10, 0x10, 0x00,                 /* l       %r1,0(%r1)  */
523     0x07, 0xf1,                             /* br      %r1         */
524     0x0d, 0x10,                             /* basr    %r1,%r0     */
525     0x58, 0x10, 0x10, 0x0e,                 /* l       %r1,14(%r1) */
526     0xa7, 0xf4, 0x00, 0x00,                 /* j       first plt   */
527     0x00, 0x00,                             /* padding             */
528     0x00, 0x00, 0x00, 0x00,                 /* GOT offset          */
529     0x00, 0x00, 0x00, 0x00                  /* rela.plt offset     */
530   };
531 
532 /* Generic PLT pic entry.  */
533 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
534   {
535     0x0d, 0x10,                             /* basr    %r1,%r0         */
536     0x58, 0x10, 0x10, 0x16,                 /* l       %r1,22(%r1)     */
537     0x58, 0x11, 0xc0, 0x00,                 /* l       %r1,0(%r1,%r12) */
538     0x07, 0xf1,                             /* br      %r1             */
539     0x0d, 0x10,                             /* basr    %r1,%r0         */
540     0x58, 0x10, 0x10, 0x0e,                 /* l       %r1,14(%r1)     */
541     0xa7, 0xf4, 0x00, 0x00,                 /* j       first plt       */
542     0x00, 0x00,                             /* padding                 */
543     0x00, 0x00, 0x00, 0x00,                 /* GOT offset              */
544     0x00, 0x00, 0x00, 0x00                  /* rela.plt offset         */
545   };
546 
547 /* Optimized PLT pic entry for GOT offset < 4k.  xx will be replaced
548    when generating the PLT slot with the GOT offset.  */
549 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
550   {
551     0x58, 0x10, 0xc0, 0x00,                 /* l       %r1,xx(%r12) */
552     0x07, 0xf1,                             /* br      %r1          */
553     0x00, 0x00, 0x00, 0x00,                 /* padding              */
554     0x00, 0x00,
555     0x0d, 0x10,                             /* basr    %r1,%r0      */
556     0x58, 0x10, 0x10, 0x0e,                 /* l       %r1,14(%r1)  */
557     0xa7, 0xf4, 0x00, 0x00,                 /* j       first plt    */
558     0x00, 0x00, 0x00, 0x00,
559     0x00, 0x00, 0x00, 0x00
560   };
561 
562 /* Optimized PLT pic entry for GOT offset < 32k.  xx will be replaced
563    when generating the PLT slot with the GOT offset.  */
564 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
565   {
566     0xa7, 0x18, 0x00, 0x00,                 /* lhi     %r1,xx          */
567     0x58, 0x11, 0xc0, 0x00,                 /* l       %r1,0(%r1,%r12) */
568     0x07, 0xf1,                             /* br      %r1             */
569     0x00, 0x00,
570     0x0d, 0x10,                             /* basr    %r1,%r0         */
571     0x58, 0x10, 0x10, 0x0e,                 /* l       %r1,14(%r1)     */
572     0xa7, 0xf4, 0x00, 0x00,                 /* j       first plt       */
573     0x00, 0x00, 0x00, 0x00,
574     0x00, 0x00, 0x00, 0x00,
575     0x00, 0x00
576   };
577 
578 /* The first PLT entry pushes the offset into the rela.plt
579    from R1 onto the stack at 8(15) and the loader object info
580    at 12(15), loads the loader address in R1 and jumps to it.  */
581 
582 /* The first entry in the PLT for PIC code:
583 
584 PLT0:
585    ST   1,28(15)  # R1 has offset into rela.plt
586    L    1,4(12)   # Get loader ino(object struct address)
587    ST   1,24(15)  # Store address
588    L    1,8(12)   # Entry address of loader in R1
589    BR   1         # Jump to loader
590 
591    The first entry in the PLT for static code:
592 
593 PLT0:
594    ST   1,28(15)      # R1 has offset into rela.plt
595    BASR 1,0
596    L    1,18(0,1)     # Get address of GOT
597    MVC  24(4,15),4(1) # Move loader ino to stack
598    L    1,8(1)        # Get address of loader
599    BR   1             # Jump to loader
600    .word 0            # filler
601    .long got          # address of GOT  */
602 
603 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
604   {
605     0x50, 0x10, 0xf0, 0x1c,                   /* st      %r1,28(%r15)      */
606     0x0d, 0x10,                               /* basr    %r1,%r0           */
607     0x58, 0x10, 0x10, 0x12,                   /* l       %r1,18(%r1)       */
608     0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04,       /* mvc     24(4,%r15),4(%r1) */
609     0x58, 0x10, 0x10, 0x08,                   /* l       %r1,8(%r1)        */
610     0x07, 0xf1,                               /* br      %r1               */
611     0x00, 0x00, 0x00, 0x00,
612     0x00, 0x00, 0x00, 0x00,
613     0x00, 0x00
614   };
615 
616 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
617   {
618     0x50, 0x10, 0xf0, 0x1c,                     /* st      %r1,28(%r15)  */
619     0x58, 0x10, 0xc0, 0x04,                     /* l       %r1,4(%r12)   */
620     0x50, 0x10, 0xf0, 0x18,                     /* st      %r1,24(%r15)  */
621     0x58, 0x10, 0xc0, 0x08,                     /* l       %r1,8(%r12)   */
622     0x07, 0xf1,                                 /* br      %r1           */
623     0x00, 0x00, 0x00, 0x00,
624     0x00, 0x00, 0x00, 0x00,
625     0x00, 0x00, 0x00, 0x00,
626     0x00, 0x00
627   };
628 
629 
630 /* s390 ELF linker hash entry.  */
631 
632 struct elf_s390_link_hash_entry
633 {
634   struct elf_link_hash_entry elf;
635 
636   /* Track dynamic relocs copied for this symbol.  */
637   struct elf_dyn_relocs *dyn_relocs;
638 
639   /* Number of GOTPLT references for a function.  */
640   bfd_signed_vma gotplt_refcount;
641 
642 #define GOT_UNKNOWN	0
643 #define GOT_NORMAL	1
644 #define GOT_TLS_GD	2
645 #define GOT_TLS_IE	3
646 #define GOT_TLS_IE_NLT	4
647   unsigned char tls_type;
648 
649   /* For pointer equality reasons we might need to change the symbol
650      type from STT_GNU_IFUNC to STT_FUNC together with its value and
651      section entry.  So after alloc_dynrelocs only these values should
652      be used.  In order to check whether a symbol is IFUNC use
653      s390_is_ifunc_symbol_p.  */
654   bfd_vma ifunc_resolver_address;
655   asection *ifunc_resolver_section;
656 };
657 
658 #define elf_s390_hash_entry(ent) \
659   ((struct elf_s390_link_hash_entry *)(ent))
660 
661 /* This structure represents an entry in the local PLT list needed for
662    local IFUNC symbols.  */
663 struct plt_entry
664 {
665   /* The section of the local symbol.
666      Set in relocate_section and used in finish_dynamic_sections.  */
667   asection *sec;
668 
669   union
670   {
671     bfd_signed_vma refcount;
672     bfd_vma offset;
673   } plt;
674 };
675 
676 /* NOTE: Keep this structure in sync with
677    the one declared in elf64-s390.c.  */
678 struct elf_s390_obj_tdata
679 {
680   struct elf_obj_tdata root;
681 
682   /* A local PLT is needed for ifunc symbols.  */
683   struct plt_entry *local_plt;
684 
685   /* TLS type for each local got entry.  */
686   char *local_got_tls_type;
687 };
688 
689 #define elf_s390_tdata(abfd) \
690   ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
691 
692 #define elf_s390_local_plt(abfd)		\
693   (elf_s390_tdata (abfd)->local_plt)
694 
695 #define elf_s390_local_got_tls_type(abfd) \
696   (elf_s390_tdata (abfd)->local_got_tls_type)
697 
698 #define is_s390_elf(bfd) \
699   (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
700    && elf_tdata (bfd) != NULL \
701    && elf_object_id (bfd) == S390_ELF_DATA)
702 
703 static bfd_boolean
elf_s390_mkobject(bfd * abfd)704 elf_s390_mkobject (bfd *abfd)
705 {
706   return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
707 				  S390_ELF_DATA);
708 }
709 
710 static bfd_boolean
elf_s390_object_p(bfd * abfd)711 elf_s390_object_p (bfd *abfd)
712 {
713   /* Set the right machine number for an s390 elf32 file.  */
714   return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
715 }
716 
717 /* s390 ELF linker hash table.  */
718 
719 struct elf_s390_link_hash_table
720 {
721   struct elf_link_hash_table elf;
722 
723   /* Short-cuts to get to dynamic linker sections.  */
724   asection *sdynbss;
725   asection *srelbss;
726   asection *irelifunc;
727 
728   union
729   {
730     bfd_signed_vma refcount;
731     bfd_vma offset;
732   } tls_ldm_got;
733 
734   /* Small local sym cache.  */
735   struct sym_cache sym_cache;
736 };
737 
738 /* Get the s390 ELF linker hash table from a link_info structure.  */
739 
740 #define elf_s390_hash_table(p) \
741   (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
742   == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
743 
744 #undef ELF64
745 #include "elf-s390-common.c"
746 
747 /* Create an entry in an s390 ELF linker hash table.  */
748 
749 static struct bfd_hash_entry *
link_hash_newfunc(struct bfd_hash_entry * entry,struct bfd_hash_table * table,const char * string)750 link_hash_newfunc (struct bfd_hash_entry *entry,
751 		   struct bfd_hash_table *table,
752 		   const char *string)
753 {
754   /* Allocate the structure if it has not already been allocated by a
755      subclass.  */
756   if (entry == NULL)
757     {
758       entry = bfd_hash_allocate (table,
759 				 sizeof (struct elf_s390_link_hash_entry));
760       if (entry == NULL)
761 	return entry;
762     }
763 
764   /* Call the allocation method of the superclass.  */
765   entry = _bfd_elf_link_hash_newfunc (entry, table, string);
766   if (entry != NULL)
767     {
768       struct elf_s390_link_hash_entry *eh;
769 
770       eh = (struct elf_s390_link_hash_entry *) entry;
771       eh->dyn_relocs = NULL;
772       eh->gotplt_refcount = 0;
773       eh->tls_type = GOT_UNKNOWN;
774       eh->ifunc_resolver_address = 0;
775       eh->ifunc_resolver_section = NULL;
776     }
777 
778   return entry;
779 }
780 
781 /* Create an s390 ELF linker hash table.  */
782 
783 static struct bfd_link_hash_table *
elf_s390_link_hash_table_create(bfd * abfd)784 elf_s390_link_hash_table_create (bfd *abfd)
785 {
786   struct elf_s390_link_hash_table *ret;
787   bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
788 
789   ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
790   if (ret == NULL)
791     return NULL;
792 
793   if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
794 				      sizeof (struct elf_s390_link_hash_entry),
795 				      S390_ELF_DATA))
796     {
797       free (ret);
798       return NULL;
799     }
800 
801   return &ret->elf.root;
802 }
803 
804 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
805    shortcuts to them in our hash table.  */
806 
807 static bfd_boolean
create_got_section(bfd * dynobj,struct bfd_link_info * info)808 create_got_section (bfd *dynobj, struct bfd_link_info *info)
809 {
810   struct elf_s390_link_hash_table *htab;
811 
812   if (! _bfd_elf_create_got_section (dynobj, info))
813     return FALSE;
814 
815   htab = elf_s390_hash_table (info);
816   htab->elf.sgot = bfd_get_linker_section (dynobj, ".got");
817   htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
818   htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got");
819   if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot)
820     abort ();
821 
822   return TRUE;
823 }
824 
825 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
826    .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
827    hash table.  */
828 
829 static bfd_boolean
elf_s390_create_dynamic_sections(bfd * dynobj,struct bfd_link_info * info)830 elf_s390_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
831 {
832   struct elf_s390_link_hash_table *htab;
833 
834   htab = elf_s390_hash_table (info);
835   if (!htab->elf.sgot && !create_got_section (dynobj, info))
836     return FALSE;
837 
838   if (!_bfd_elf_create_dynamic_sections (dynobj, info))
839     return FALSE;
840 
841   htab->elf.splt = bfd_get_linker_section (dynobj, ".plt");
842   htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
843   htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
844   if (!info->shared)
845     htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
846 
847   if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
848       || (!info->shared && !htab->srelbss))
849     abort ();
850 
851   return TRUE;
852 }
853 
854 /* Copy the extra info we tack onto an elf_link_hash_entry.  */
855 
856 static void
elf_s390_copy_indirect_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * dir,struct elf_link_hash_entry * ind)857 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
858 			       struct elf_link_hash_entry *dir,
859 			       struct elf_link_hash_entry *ind)
860 {
861   struct elf_s390_link_hash_entry *edir, *eind;
862 
863   edir = (struct elf_s390_link_hash_entry *) dir;
864   eind = (struct elf_s390_link_hash_entry *) ind;
865 
866   if (eind->dyn_relocs != NULL)
867     {
868       if (edir->dyn_relocs != NULL)
869 	{
870 	  struct elf_dyn_relocs **pp;
871 	  struct elf_dyn_relocs *p;
872 
873 	  /* Add reloc counts against the indirect sym to the direct sym
874 	     list.  Merge any entries against the same section.  */
875 	  for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
876 	    {
877 	      struct elf_dyn_relocs *q;
878 
879 	      for (q = edir->dyn_relocs; q != NULL; q = q->next)
880 		if (q->sec == p->sec)
881 		  {
882 		    q->pc_count += p->pc_count;
883 		    q->count += p->count;
884 		    *pp = p->next;
885 		    break;
886 		  }
887 	      if (q == NULL)
888 		pp = &p->next;
889 	    }
890 	  *pp = edir->dyn_relocs;
891 	}
892 
893       edir->dyn_relocs = eind->dyn_relocs;
894       eind->dyn_relocs = NULL;
895     }
896 
897   if (ind->root.type == bfd_link_hash_indirect
898       && dir->got.refcount <= 0)
899     {
900       edir->tls_type = eind->tls_type;
901       eind->tls_type = GOT_UNKNOWN;
902     }
903 
904   if (ELIMINATE_COPY_RELOCS
905       && ind->root.type != bfd_link_hash_indirect
906       && dir->dynamic_adjusted)
907     {
908       /* If called to transfer flags for a weakdef during processing
909 	 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
910 	 We clear it ourselves for ELIMINATE_COPY_RELOCS.  */
911       dir->ref_dynamic |= ind->ref_dynamic;
912       dir->ref_regular |= ind->ref_regular;
913       dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
914       dir->needs_plt |= ind->needs_plt;
915     }
916   else
917     _bfd_elf_link_hash_copy_indirect (info, dir, ind);
918 }
919 
920 static int
elf_s390_tls_transition(struct bfd_link_info * info,int r_type,int is_local)921 elf_s390_tls_transition (struct bfd_link_info *info,
922 			 int r_type,
923 			 int is_local)
924 {
925   if (info->shared)
926     return r_type;
927 
928   switch (r_type)
929     {
930     case R_390_TLS_GD32:
931     case R_390_TLS_IE32:
932       if (is_local)
933 	return R_390_TLS_LE32;
934       return R_390_TLS_IE32;
935     case R_390_TLS_GOTIE32:
936       if (is_local)
937 	return R_390_TLS_LE32;
938       return R_390_TLS_GOTIE32;
939     case R_390_TLS_LDM32:
940       return R_390_TLS_LE32;
941     }
942 
943   return r_type;
944 }
945 
946 /* Look through the relocs for a section during the first phase, and
947    allocate space in the global offset table or procedure linkage
948    table.  */
949 
950 static bfd_boolean
elf_s390_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)951 elf_s390_check_relocs (bfd *abfd,
952 		       struct bfd_link_info *info,
953 		       asection *sec,
954 		       const Elf_Internal_Rela *relocs)
955 {
956   struct elf_s390_link_hash_table *htab;
957   Elf_Internal_Shdr *symtab_hdr;
958   struct elf_link_hash_entry **sym_hashes;
959   const Elf_Internal_Rela *rel;
960   const Elf_Internal_Rela *rel_end;
961   asection *sreloc;
962   bfd_signed_vma *local_got_refcounts;
963   int tls_type, old_tls_type;
964   Elf_Internal_Sym *isym;
965 
966   if (info->relocatable)
967     return TRUE;
968 
969   BFD_ASSERT (is_s390_elf (abfd));
970 
971   htab = elf_s390_hash_table (info);
972   symtab_hdr = &elf_symtab_hdr (abfd);
973   sym_hashes = elf_sym_hashes (abfd);
974   local_got_refcounts = elf_local_got_refcounts (abfd);
975 
976   sreloc = NULL;
977 
978   rel_end = relocs + sec->reloc_count;
979   for (rel = relocs; rel < rel_end; rel++)
980     {
981       unsigned int r_type;
982       unsigned long r_symndx;
983       struct elf_link_hash_entry *h;
984 
985       r_symndx = ELF32_R_SYM (rel->r_info);
986 
987       if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
988 	{
989 	  (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
990 				 abfd, r_symndx);
991 	  return FALSE;
992 	}
993 
994       if (r_symndx < symtab_hdr->sh_info)
995 	{
996 	  /* A local symbol.  */
997 	  isym = bfd_sym_from_r_symndx (&htab->sym_cache,
998 					abfd, r_symndx);
999 	  if (isym == NULL)
1000 	    return FALSE;
1001 
1002 	  if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1003 	    {
1004 	      struct plt_entry *plt;
1005 
1006 	      if (htab->elf.dynobj == NULL)
1007 		htab->elf.dynobj = abfd;
1008 
1009 	      if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1010 		return FALSE;
1011 
1012 	      if (local_got_refcounts == NULL)
1013 		{
1014 		  if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1015 		    return FALSE;
1016 		  local_got_refcounts = elf_local_got_refcounts (abfd);
1017 		}
1018 	      plt = elf_s390_local_plt (abfd);
1019 	      plt[r_symndx].plt.refcount++;
1020 	    }
1021 	  h = NULL;
1022 	}
1023       else
1024 	{
1025 	  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1026 	  while (h->root.type == bfd_link_hash_indirect
1027 		 || h->root.type == bfd_link_hash_warning)
1028 	    h = (struct elf_link_hash_entry *) h->root.u.i.link;
1029 	}
1030 
1031       /* Create got section and local_got_refcounts array if they
1032 	 are needed.  */
1033       r_type = elf_s390_tls_transition (info,
1034 					ELF32_R_TYPE (rel->r_info),
1035 					h == NULL);
1036       switch (r_type)
1037 	{
1038 	case R_390_GOT12:
1039 	case R_390_GOT16:
1040 	case R_390_GOT20:
1041 	case R_390_GOT32:
1042 	case R_390_GOTENT:
1043 	case R_390_GOTPLT12:
1044 	case R_390_GOTPLT16:
1045 	case R_390_GOTPLT20:
1046 	case R_390_GOTPLT32:
1047 	case R_390_GOTPLTENT:
1048 	case R_390_TLS_GD32:
1049 	case R_390_TLS_GOTIE12:
1050 	case R_390_TLS_GOTIE20:
1051 	case R_390_TLS_GOTIE32:
1052 	case R_390_TLS_IEENT:
1053 	case R_390_TLS_IE32:
1054 	case R_390_TLS_LDM32:
1055 	  if (h == NULL
1056 	      && local_got_refcounts == NULL)
1057 	    {
1058 	      if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1059 		return FALSE;
1060 	      local_got_refcounts = elf_local_got_refcounts (abfd);
1061 	    }
1062 	  /* Fall through.  */
1063 	case R_390_GOTOFF16:
1064 	case R_390_GOTOFF32:
1065 	case R_390_GOTPC:
1066 	case R_390_GOTPCDBL:
1067 	  if (htab->elf.sgot == NULL)
1068 	    {
1069 	      if (htab->elf.dynobj == NULL)
1070 		htab->elf.dynobj = abfd;
1071 	      if (!create_got_section (htab->elf.dynobj, info))
1072 		return FALSE;
1073 	    }
1074 	}
1075 
1076       if (h != NULL)
1077 	{
1078 	  if (htab->elf.dynobj == NULL)
1079 	    htab->elf.dynobj = abfd;
1080 	  if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1081 	    return FALSE;
1082 
1083 	  /* Make sure an IFUNC symbol defined in a non-shared object
1084 	     always gets a PLT slot.  */
1085 	  if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1086 	    {
1087 	      /* The symbol is called by the dynamic loader in order
1088 		 to resolve the relocation.  So it is in fact also
1089 		 referenced.  */
1090 	      h->ref_regular = 1;
1091 	      h->needs_plt = 1;
1092 	    }
1093 	}
1094       switch (r_type)
1095 	{
1096 	case R_390_GOTOFF16:
1097 	case R_390_GOTOFF32:
1098 	case R_390_GOTPC:
1099 	case R_390_GOTPCDBL:
1100 	  /* These relocs do not need a GOT slot.  They just load the
1101 	     GOT pointer itself or address something else relative to
1102 	     the GOT.  Since the GOT pointer has been set up above we
1103 	     are done.  */
1104 	  break;
1105 
1106 	case R_390_PLT16DBL:
1107 	case R_390_PLT32DBL:
1108 	case R_390_PLT32:
1109 	case R_390_PLTOFF16:
1110 	case R_390_PLTOFF32:
1111 	  /* This symbol requires a procedure linkage table entry.  We
1112 	     actually build the entry in adjust_dynamic_symbol,
1113 	     because this might be a case of linking PIC code which is
1114 	     never referenced by a dynamic object, in which case we
1115 	     don't need to generate a procedure linkage table entry
1116 	     after all.  */
1117 
1118 	  /* If this is a local symbol, we resolve it directly without
1119 	     creating a procedure linkage table entry.  */
1120 	  if (h != NULL)
1121 	    {
1122 	      h->needs_plt = 1;
1123 	      h->plt.refcount += 1;
1124 	    }
1125 	  break;
1126 
1127 	case R_390_GOTPLT12:
1128 	case R_390_GOTPLT16:
1129 	case R_390_GOTPLT20:
1130 	case R_390_GOTPLT32:
1131 	case R_390_GOTPLTENT:
1132 	  /* This symbol requires either a procedure linkage table entry
1133 	     or an entry in the local got. We actually build the entry
1134 	     in adjust_dynamic_symbol because whether this is really a
1135 	     global reference can change and with it the fact if we have
1136 	     to create a plt entry or a local got entry. To be able to
1137 	     make a once global symbol a local one we have to keep track
1138 	     of the number of gotplt references that exist for this
1139 	     symbol.  */
1140 	  if (h != NULL)
1141 	    {
1142 	      ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1143 	      h->needs_plt = 1;
1144 	      h->plt.refcount += 1;
1145 	    }
1146 	  else
1147 	    local_got_refcounts[r_symndx] += 1;
1148 	  break;
1149 
1150 	case R_390_TLS_LDM32:
1151 	  htab->tls_ldm_got.refcount += 1;
1152 	  break;
1153 
1154 	case R_390_TLS_IE32:
1155 	case R_390_TLS_GOTIE12:
1156 	case R_390_TLS_GOTIE20:
1157 	case R_390_TLS_GOTIE32:
1158 	case R_390_TLS_IEENT:
1159 	  if (info->shared)
1160 	    info->flags |= DF_STATIC_TLS;
1161 	  /* Fall through.  */
1162 
1163 	case R_390_GOT12:
1164 	case R_390_GOT16:
1165 	case R_390_GOT20:
1166 	case R_390_GOT32:
1167 	case R_390_GOTENT:
1168 	case R_390_TLS_GD32:
1169 	  /* This symbol requires a global offset table entry.  */
1170 	  switch (r_type)
1171 	    {
1172 	    default:
1173 	    case R_390_GOT12:
1174 	    case R_390_GOT16:
1175 	    case R_390_GOT20:
1176 	    case R_390_GOT32:
1177 	    case R_390_GOTENT:
1178 	      tls_type = GOT_NORMAL;
1179 	      break;
1180 	    case R_390_TLS_GD32:
1181 	      tls_type = GOT_TLS_GD;
1182 	      break;
1183 	    case R_390_TLS_IE32:
1184 	    case R_390_TLS_GOTIE32:
1185 	      tls_type = GOT_TLS_IE;
1186 	      break;
1187 	    case R_390_TLS_GOTIE12:
1188 	    case R_390_TLS_GOTIE20:
1189 	    case R_390_TLS_IEENT:
1190 	      tls_type = GOT_TLS_IE_NLT;
1191 	      break;
1192 	    }
1193 
1194 	  if (h != NULL)
1195 	    {
1196 	      h->got.refcount += 1;
1197 	      old_tls_type = elf_s390_hash_entry(h)->tls_type;
1198 	    }
1199 	  else
1200 	    {
1201 	      local_got_refcounts[r_symndx] += 1;
1202 	      old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1203 	    }
1204 	  /* If a TLS symbol is accessed using IE at least once,
1205 	     there is no point to use dynamic model for it.  */
1206 	  if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1207 	    {
1208 	      if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1209 		{
1210 		  (*_bfd_error_handler)
1211 		    (_("%B: `%s' accessed both as normal and thread local symbol"),
1212 		     abfd, h->root.root.string);
1213 		  return FALSE;
1214 		}
1215 	      if (old_tls_type > tls_type)
1216 		tls_type = old_tls_type;
1217 	    }
1218 
1219 	  if (old_tls_type != tls_type)
1220 	    {
1221 	      if (h != NULL)
1222 		elf_s390_hash_entry (h)->tls_type = tls_type;
1223 	      else
1224 		elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1225 	    }
1226 
1227 	  if (r_type != R_390_TLS_IE32)
1228 	    break;
1229 	  /* Fall through.  */
1230 
1231 	case R_390_TLS_LE32:
1232 	  if (!info->shared)
1233 	    break;
1234 	  info->flags |= DF_STATIC_TLS;
1235 	  /* Fall through.  */
1236 
1237 	case R_390_8:
1238 	case R_390_16:
1239 	case R_390_32:
1240 	case R_390_PC16:
1241 	case R_390_PC16DBL:
1242 	case R_390_PC32DBL:
1243 	case R_390_PC32:
1244 	  if (h != NULL)
1245 	    {
1246 	      /* If this reloc is in a read-only section, we might
1247 		 need a copy reloc.  We can't check reliably at this
1248 		 stage whether the section is read-only, as input
1249 		 sections have not yet been mapped to output sections.
1250 		 Tentatively set the flag for now, and correct in
1251 		 adjust_dynamic_symbol.  */
1252 	      h->non_got_ref = 1;
1253 
1254 	      if (!info->shared)
1255 		{
1256 		  /* We may need a .plt entry if the function this reloc
1257 		     refers to is in a shared lib.  */
1258 		  h->plt.refcount += 1;
1259 		}
1260 	    }
1261 
1262 	  /* If we are creating a shared library, and this is a reloc
1263 	     against a global symbol, or a non PC relative reloc
1264 	     against a local symbol, then we need to copy the reloc
1265 	     into the shared library.  However, if we are linking with
1266 	     -Bsymbolic, we do not need to copy a reloc against a
1267 	     global symbol which is defined in an object we are
1268 	     including in the link (i.e., DEF_REGULAR is set).  At
1269 	     this point we have not seen all the input files, so it is
1270 	     possible that DEF_REGULAR is not set now but will be set
1271 	     later (it is never cleared).  In case of a weak definition,
1272 	     DEF_REGULAR may be cleared later by a strong definition in
1273 	     a shared library. We account for that possibility below by
1274 	     storing information in the relocs_copied field of the hash
1275 	     table entry.  A similar situation occurs when creating
1276 	     shared libraries and symbol visibility changes render the
1277 	     symbol local.
1278 
1279 	     If on the other hand, we are creating an executable, we
1280 	     may need to keep relocations for symbols satisfied by a
1281 	     dynamic library if we manage to avoid copy relocs for the
1282 	     symbol.  */
1283 	  if ((info->shared
1284 	       && (sec->flags & SEC_ALLOC) != 0
1285 	       && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1286 		    && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1287 		    && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1288 		    && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1289 		   || (h != NULL
1290 		       && (! SYMBOLIC_BIND (info, h)
1291 			   || h->root.type == bfd_link_hash_defweak
1292 			   || !h->def_regular))))
1293 	      || (ELIMINATE_COPY_RELOCS
1294 		  && !info->shared
1295 		  && (sec->flags & SEC_ALLOC) != 0
1296 		  && h != NULL
1297 		  && (h->root.type == bfd_link_hash_defweak
1298 		      || !h->def_regular)))
1299 	    {
1300 	      struct elf_dyn_relocs *p;
1301 	      struct elf_dyn_relocs **head;
1302 
1303 	      /* We must copy these reloc types into the output file.
1304 		 Create a reloc section in dynobj and make room for
1305 		 this reloc.  */
1306 	      if (sreloc == NULL)
1307 		{
1308 		  if (htab->elf.dynobj == NULL)
1309 		    htab->elf.dynobj = abfd;
1310 
1311 		  sreloc = _bfd_elf_make_dynamic_reloc_section
1312 		    (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1313 
1314 		  if (sreloc == NULL)
1315 		    return FALSE;
1316 		}
1317 
1318 	      /* If this is a global symbol, we count the number of
1319 		 relocations we need for this symbol.  */
1320 	      if (h != NULL)
1321 		{
1322 		  head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1323 		}
1324 	      else
1325 		{
1326 		  /* Track dynamic relocs needed for local syms too.
1327 		     We really need local syms available to do this
1328 		     easily.  Oh well.  */
1329 		  asection *s;
1330 		  void *vpp;
1331 
1332 		  isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1333 						abfd, r_symndx);
1334 		  if (isym == NULL)
1335 		    return FALSE;
1336 
1337 		  s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1338 		  if (s == NULL)
1339 		    s = sec;
1340 
1341 		  vpp = &elf_section_data (s)->local_dynrel;
1342 		  head = (struct elf_dyn_relocs **) vpp;
1343 		}
1344 
1345 	      p = *head;
1346 	      if (p == NULL || p->sec != sec)
1347 		{
1348 		  bfd_size_type amt = sizeof *p;
1349 
1350 		  p = ((struct elf_dyn_relocs *)
1351 		       bfd_alloc (htab->elf.dynobj, amt));
1352 		  if (p == NULL)
1353 		    return FALSE;
1354 		  p->next = *head;
1355 		  *head = p;
1356 		  p->sec = sec;
1357 		  p->count = 0;
1358 		  p->pc_count = 0;
1359 		}
1360 
1361 	      p->count += 1;
1362 	      if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1363 		  || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1364 		  || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1365 		  || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1366 		p->pc_count += 1;
1367 	    }
1368 	  break;
1369 
1370 	  /* This relocation describes the C++ object vtable hierarchy.
1371 	     Reconstruct it for later use during GC.  */
1372 	case R_390_GNU_VTINHERIT:
1373 	  if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1374 	    return FALSE;
1375 	  break;
1376 
1377 	  /* This relocation describes which C++ vtable entries are actually
1378 	     used.  Record for later use during GC.  */
1379 	case R_390_GNU_VTENTRY:
1380 	  BFD_ASSERT (h != NULL);
1381 	  if (h != NULL
1382 	      && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1383 	    return FALSE;
1384 	  break;
1385 
1386 	default:
1387 	  break;
1388 	}
1389     }
1390 
1391   return TRUE;
1392 }
1393 
1394 /* Return the section that should be marked against GC for a given
1395    relocation.  */
1396 
1397 static asection *
elf_s390_gc_mark_hook(asection * sec,struct bfd_link_info * info,Elf_Internal_Rela * rel,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)1398 elf_s390_gc_mark_hook (asection *sec,
1399 		       struct bfd_link_info *info,
1400 		       Elf_Internal_Rela *rel,
1401 		       struct elf_link_hash_entry *h,
1402 		       Elf_Internal_Sym *sym)
1403 {
1404   if (h != NULL)
1405     switch (ELF32_R_TYPE (rel->r_info))
1406       {
1407       case R_390_GNU_VTINHERIT:
1408       case R_390_GNU_VTENTRY:
1409 	return NULL;
1410       }
1411   return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1412 
1413 }
1414 
1415 /* Update the got entry reference counts for the section being removed.  */
1416 
1417 static bfd_boolean
elf_s390_gc_sweep_hook(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)1418 elf_s390_gc_sweep_hook (bfd *abfd,
1419 			struct bfd_link_info *info,
1420 			asection *sec,
1421 			const Elf_Internal_Rela *relocs)
1422 {
1423   struct elf_s390_link_hash_table *htab;
1424   Elf_Internal_Shdr *symtab_hdr;
1425   struct elf_link_hash_entry **sym_hashes;
1426   bfd_signed_vma *local_got_refcounts;
1427   const Elf_Internal_Rela *rel, *relend;
1428 
1429   if (info->relocatable)
1430     return TRUE;
1431 
1432   htab = elf_s390_hash_table (info);
1433   if (htab == NULL)
1434     return FALSE;
1435 
1436   elf_section_data (sec)->local_dynrel = NULL;
1437 
1438   symtab_hdr = &elf_symtab_hdr (abfd);
1439   sym_hashes = elf_sym_hashes (abfd);
1440   local_got_refcounts = elf_local_got_refcounts (abfd);
1441 
1442   relend = relocs + sec->reloc_count;
1443   for (rel = relocs; rel < relend; rel++)
1444     {
1445       unsigned long r_symndx;
1446       unsigned int r_type;
1447       struct elf_link_hash_entry *h = NULL;
1448 
1449       r_symndx = ELF32_R_SYM (rel->r_info);
1450       if (r_symndx >= symtab_hdr->sh_info)
1451 	{
1452 	  struct elf_s390_link_hash_entry *eh;
1453 	  struct elf_dyn_relocs **pp;
1454 	  struct elf_dyn_relocs *p;
1455 
1456 	  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1457 	  while (h->root.type == bfd_link_hash_indirect
1458 		 || h->root.type == bfd_link_hash_warning)
1459 	    h = (struct elf_link_hash_entry *) h->root.u.i.link;
1460 	  eh = (struct elf_s390_link_hash_entry *) h;
1461 
1462 	  for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1463 	    if (p->sec == sec)
1464 	      {
1465 		/* Everything must go for SEC.  */
1466 		*pp = p->next;
1467 		break;
1468 	      }
1469 	}
1470       else
1471 	{
1472 	  Elf_Internal_Sym *isym;
1473 
1474 	  /* A local symbol.  */
1475 	  isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1476 					abfd, r_symndx);
1477 	  if (isym == NULL)
1478 	    return FALSE;
1479 
1480 	  if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1481 	    {
1482 	      struct plt_entry *plt = elf_s390_local_plt (abfd);
1483 	      if (plt[r_symndx].plt.refcount > 0)
1484 		plt[r_symndx].plt.refcount--;
1485 	    }
1486 	}
1487 
1488       r_type = ELF32_R_TYPE (rel->r_info);
1489       r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1490       switch (r_type)
1491 	{
1492 	case R_390_TLS_LDM32:
1493 	  if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1494 	    elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1495 	  break;
1496 
1497 	case R_390_TLS_GD32:
1498 	case R_390_TLS_IE32:
1499 	case R_390_TLS_GOTIE12:
1500 	case R_390_TLS_GOTIE20:
1501 	case R_390_TLS_GOTIE32:
1502 	case R_390_TLS_IEENT:
1503 	case R_390_GOT12:
1504 	case R_390_GOT16:
1505 	case R_390_GOT20:
1506 	case R_390_GOT32:
1507 	case R_390_GOTOFF16:
1508 	case R_390_GOTOFF32:
1509 	case R_390_GOTPC:
1510 	case R_390_GOTPCDBL:
1511 	case R_390_GOTENT:
1512 	  if (h != NULL)
1513 	    {
1514 	      if (h->got.refcount > 0)
1515 		h->got.refcount -= 1;
1516 	    }
1517 	  else if (local_got_refcounts != NULL)
1518 	    {
1519 	      if (local_got_refcounts[r_symndx] > 0)
1520 		local_got_refcounts[r_symndx] -= 1;
1521 	    }
1522 	  break;
1523 
1524 	case R_390_8:
1525 	case R_390_12:
1526 	case R_390_16:
1527 	case R_390_20:
1528 	case R_390_32:
1529 	case R_390_PC16:
1530 	case R_390_PC16DBL:
1531 	case R_390_PC32DBL:
1532 	case R_390_PC32:
1533 	  if (info->shared)
1534 	    break;
1535 	  /* Fall through.  */
1536 
1537 	case R_390_PLT16DBL:
1538 	case R_390_PLT32DBL:
1539 	case R_390_PLT32:
1540 	case R_390_PLTOFF16:
1541 	case R_390_PLTOFF32:
1542 	  if (h != NULL)
1543 	    {
1544 	      if (h->plt.refcount > 0)
1545 		h->plt.refcount -= 1;
1546 	    }
1547 	  break;
1548 
1549 	case R_390_GOTPLT12:
1550 	case R_390_GOTPLT16:
1551 	case R_390_GOTPLT20:
1552 	case R_390_GOTPLT32:
1553 	case R_390_GOTPLTENT:
1554 	  if (h != NULL)
1555 	    {
1556 	      if (h->plt.refcount > 0)
1557 		{
1558 		  ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1559 		  h->plt.refcount -= 1;
1560 		}
1561 	    }
1562 	  else if (local_got_refcounts != NULL)
1563 	    {
1564 	      if (local_got_refcounts[r_symndx] > 0)
1565 		local_got_refcounts[r_symndx] -= 1;
1566 	    }
1567 	  break;
1568 
1569 	default:
1570 	  break;
1571 	}
1572     }
1573 
1574   return TRUE;
1575 }
1576 
1577 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1578    entry but we found we will not create any.  Called when we find we will
1579    not have any PLT for this symbol, by for example
1580    elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1581    or elf_s390_size_dynamic_sections if no dynamic sections will be
1582    created (we're only linking static objects).  */
1583 
1584 static void
elf_s390_adjust_gotplt(struct elf_s390_link_hash_entry * h)1585 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1586 {
1587   if (h->elf.root.type == bfd_link_hash_warning)
1588     h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1589 
1590   if (h->gotplt_refcount <= 0)
1591     return;
1592 
1593   /* We simply add the number of gotplt references to the number
1594    * of got references for this symbol.  */
1595   h->elf.got.refcount += h->gotplt_refcount;
1596   h->gotplt_refcount = -1;
1597 }
1598 
1599 /* Adjust a symbol defined by a dynamic object and referenced by a
1600    regular object.  The current definition is in some section of the
1601    dynamic object, but we're not including those sections.  We have to
1602    change the definition to something the rest of the link can
1603    understand.  */
1604 
1605 static bfd_boolean
elf_s390_adjust_dynamic_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h)1606 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1607 				struct elf_link_hash_entry *h)
1608 {
1609   struct elf_s390_link_hash_table *htab;
1610   asection *s;
1611 
1612   /* STT_GNU_IFUNC symbol must go through PLT. */
1613   if (s390_is_ifunc_symbol_p (h))
1614     return TRUE;
1615 
1616   /* If this is a function, put it in the procedure linkage table.  We
1617      will fill in the contents of the procedure linkage table later
1618      (although we could actually do it here).  */
1619   if (h->type == STT_FUNC
1620       || h->needs_plt)
1621     {
1622       if (h->plt.refcount <= 0
1623 	  || SYMBOL_CALLS_LOCAL (info, h)
1624 	  || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1625 	      && h->root.type != bfd_link_hash_undefweak))
1626 	{
1627 	  /* This case can occur if we saw a PLT32 reloc in an input
1628 	     file, but the symbol was never referred to by a dynamic
1629 	     object, or if all references were garbage collected.  In
1630 	     such a case, we don't actually need to build a procedure
1631 	     linkage table, and we can just do a PC32 reloc instead.  */
1632 	  h->plt.offset = (bfd_vma) -1;
1633 	  h->needs_plt = 0;
1634 	  elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1635 	}
1636 
1637       return TRUE;
1638     }
1639   else
1640     /* It's possible that we incorrectly decided a .plt reloc was
1641        needed for an R_390_PC32 reloc to a non-function sym in
1642        check_relocs.  We can't decide accurately between function and
1643        non-function syms in check-relocs;  Objects loaded later in
1644        the link may change h->type.  So fix it now.  */
1645     h->plt.offset = (bfd_vma) -1;
1646 
1647   /* If this is a weak symbol, and there is a real definition, the
1648      processor independent code will have arranged for us to see the
1649      real definition first, and we can just use the same value.  */
1650   if (h->u.weakdef != NULL)
1651     {
1652       BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1653 		  || h->u.weakdef->root.type == bfd_link_hash_defweak);
1654       h->root.u.def.section = h->u.weakdef->root.u.def.section;
1655       h->root.u.def.value = h->u.weakdef->root.u.def.value;
1656       if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1657 	h->non_got_ref = h->u.weakdef->non_got_ref;
1658       return TRUE;
1659     }
1660 
1661   /* This is a reference to a symbol defined by a dynamic object which
1662      is not a function.  */
1663 
1664   /* If we are creating a shared library, we must presume that the
1665      only references to the symbol are via the global offset table.
1666      For such cases we need not do anything here; the relocations will
1667      be handled correctly by relocate_section.  */
1668   if (info->shared)
1669     return TRUE;
1670 
1671   /* If there are no references to this symbol that do not use the
1672      GOT, we don't need to generate a copy reloc.  */
1673   if (!h->non_got_ref)
1674     return TRUE;
1675 
1676   /* If -z nocopyreloc was given, we won't generate them either.  */
1677   if (info->nocopyreloc)
1678     {
1679       h->non_got_ref = 0;
1680       return TRUE;
1681     }
1682 
1683   if (ELIMINATE_COPY_RELOCS)
1684     {
1685       struct elf_s390_link_hash_entry * eh;
1686       struct elf_dyn_relocs *p;
1687 
1688       eh = (struct elf_s390_link_hash_entry *) h;
1689       for (p = eh->dyn_relocs; p != NULL; p = p->next)
1690 	{
1691 	  s = p->sec->output_section;
1692 	  if (s != NULL && (s->flags & SEC_READONLY) != 0)
1693 	    break;
1694 	}
1695 
1696       /* If we didn't find any dynamic relocs in read-only sections, then
1697 	 we'll be keeping the dynamic relocs and avoiding the copy reloc.  */
1698       if (p == NULL)
1699 	{
1700 	  h->non_got_ref = 0;
1701 	  return TRUE;
1702 	}
1703     }
1704 
1705   /* We must allocate the symbol in our .dynbss section, which will
1706      become part of the .bss section of the executable.  There will be
1707      an entry for this symbol in the .dynsym section.  The dynamic
1708      object will contain position independent code, so all references
1709      from the dynamic object to this symbol will go through the global
1710      offset table.  The dynamic linker will use the .dynsym entry to
1711      determine the address it must put in the global offset table, so
1712      both the dynamic object and the regular object will refer to the
1713      same memory location for the variable.  */
1714 
1715   htab = elf_s390_hash_table (info);
1716 
1717   /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1718      copy the initial value out of the dynamic object and into the
1719      runtime process image.  */
1720   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1721     {
1722       htab->srelbss->size += sizeof (Elf32_External_Rela);
1723       h->needs_copy = 1;
1724     }
1725 
1726   s = htab->sdynbss;
1727 
1728   return _bfd_elf_adjust_dynamic_copy (h, s);
1729 }
1730 
1731 /* Allocate space in .plt, .got and associated reloc sections for
1732    dynamic relocs.  */
1733 
1734 static bfd_boolean
allocate_dynrelocs(struct elf_link_hash_entry * h,void * inf)1735 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1736 {
1737   struct bfd_link_info *info;
1738   struct elf_s390_link_hash_table *htab;
1739   struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1740   struct elf_dyn_relocs *p;
1741 
1742   if (h->root.type == bfd_link_hash_indirect)
1743     return TRUE;
1744 
1745   info = (struct bfd_link_info *) inf;
1746   htab = elf_s390_hash_table (info);
1747 
1748   /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1749      here if it is defined and referenced in a non-shared object.  */
1750   if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1751     return s390_elf_allocate_ifunc_dyn_relocs (info, h,
1752 					       &eh->dyn_relocs);
1753   else if (htab->elf.dynamic_sections_created
1754 	   && h->plt.refcount > 0)
1755     {
1756       /* Make sure this symbol is output as a dynamic symbol.
1757 	 Undefined weak syms won't yet be marked as dynamic.  */
1758       if (h->dynindx == -1
1759 	  && !h->forced_local)
1760 	{
1761 	  if (! bfd_elf_link_record_dynamic_symbol (info, h))
1762 	    return FALSE;
1763 	}
1764 
1765       if (info->shared
1766 	  || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1767 	{
1768 	  asection *s = htab->elf.splt;
1769 
1770 	  /* If this is the first .plt entry, make room for the special
1771 	     first entry.  */
1772 	  if (s->size == 0)
1773 	    s->size += PLT_FIRST_ENTRY_SIZE;
1774 
1775 	  h->plt.offset = s->size;
1776 
1777 	  /* If this symbol is not defined in a regular file, and we are
1778 	     not generating a shared library, then set the symbol to this
1779 	     location in the .plt.  This is required to make function
1780 	     pointers compare as equal between the normal executable and
1781 	     the shared library.  */
1782 	  if (! info->shared
1783 	      && !h->def_regular)
1784 	    {
1785 	      h->root.u.def.section = s;
1786 	      h->root.u.def.value = h->plt.offset;
1787 	    }
1788 
1789 	  /* Make room for this entry.  */
1790 	  s->size += PLT_ENTRY_SIZE;
1791 
1792 	  /* We also need to make an entry in the .got.plt section, which
1793 	     will be placed in the .got section by the linker script.  */
1794 	  htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1795 
1796 	  /* We also need to make an entry in the .rela.plt section.  */
1797 	  htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1798 	}
1799       else
1800 	{
1801  	  h->plt.offset = (bfd_vma) -1;
1802 	  h->needs_plt = 0;
1803 	  elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1804 	}
1805     }
1806   else
1807     {
1808       h->plt.offset = (bfd_vma) -1;
1809       h->needs_plt = 0;
1810       elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1811     }
1812 
1813   /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1814      the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1815      to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1816      we can save the dynamic TLS relocation.  */
1817   if (h->got.refcount > 0
1818       && !info->shared
1819       && h->dynindx == -1
1820       && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1821     {
1822       if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1823 	/* For the GOTIE access without a literal pool entry the offset has
1824 	   to be stored somewhere. The immediate value in the instruction
1825 	   is not bit enough so the value is stored in the got.  */
1826 	{
1827 	  h->got.offset = htab->elf.sgot->size;
1828 	  htab->elf.sgot->size += GOT_ENTRY_SIZE;
1829 	}
1830       else
1831 	h->got.offset = (bfd_vma) -1;
1832     }
1833   else if (h->got.refcount > 0)
1834    {
1835       asection *s;
1836       bfd_boolean dyn;
1837       int tls_type = elf_s390_hash_entry(h)->tls_type;
1838 
1839       /* Make sure this symbol is output as a dynamic symbol.
1840 	 Undefined weak syms won't yet be marked as dynamic.  */
1841       if (h->dynindx == -1
1842 	  && !h->forced_local)
1843 	{
1844 	  if (! bfd_elf_link_record_dynamic_symbol (info, h))
1845 	    return FALSE;
1846 	}
1847 
1848       s = htab->elf.sgot;
1849       h->got.offset = s->size;
1850       s->size += GOT_ENTRY_SIZE;
1851       /* R_390_TLS_GD32 needs 2 consecutive GOT slots.  */
1852       if (tls_type == GOT_TLS_GD)
1853 	s->size += GOT_ENTRY_SIZE;
1854       dyn = htab->elf.dynamic_sections_created;
1855       /* R_390_TLS_IE32 needs one dynamic relocation,
1856 	 R_390_TLS_GD32 needs one if local symbol and two if global.  */
1857       if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1858 	  || tls_type >= GOT_TLS_IE)
1859 	htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1860       else if (tls_type == GOT_TLS_GD)
1861 	htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1862       else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1863 		|| h->root.type != bfd_link_hash_undefweak)
1864 	       && (info->shared
1865 		   || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1866 	htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1867     }
1868   else
1869     h->got.offset = (bfd_vma) -1;
1870 
1871   if (eh->dyn_relocs == NULL)
1872     return TRUE;
1873 
1874   /* In the shared -Bsymbolic case, discard space allocated for
1875      dynamic pc-relative relocs against symbols which turn out to be
1876      defined in regular objects.  For the normal shared case, discard
1877      space for pc-relative relocs that have become local due to symbol
1878      visibility changes.  */
1879 
1880   if (info->shared)
1881     {
1882       if (SYMBOL_CALLS_LOCAL (info, h))
1883 	{
1884 	  struct elf_dyn_relocs **pp;
1885 
1886 	  for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1887 	    {
1888 	      p->count -= p->pc_count;
1889 	      p->pc_count = 0;
1890 	      if (p->count == 0)
1891 		*pp = p->next;
1892 	      else
1893 		pp = &p->next;
1894 	    }
1895 	}
1896 
1897       /* Also discard relocs on undefined weak syms with non-default
1898 	 visibility.  */
1899       if (eh->dyn_relocs != NULL
1900 	  && h->root.type == bfd_link_hash_undefweak)
1901 	{
1902 	  if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1903 	    eh->dyn_relocs = NULL;
1904 
1905 	  /* Make sure undefined weak symbols are output as a dynamic
1906 	     symbol in PIEs.  */
1907 	  else if (h->dynindx == -1
1908 		   && !h->forced_local)
1909 	    {
1910 	      if (! bfd_elf_link_record_dynamic_symbol (info, h))
1911 		return FALSE;
1912 	    }
1913 	}
1914     }
1915   else if (ELIMINATE_COPY_RELOCS)
1916     {
1917       /* For the non-shared case, discard space for relocs against
1918 	 symbols which turn out to need copy relocs or are not
1919 	 dynamic.  */
1920 
1921       if (!h->non_got_ref
1922 	  && ((h->def_dynamic
1923 	       && !h->def_regular)
1924 	      || (htab->elf.dynamic_sections_created
1925 		  && (h->root.type == bfd_link_hash_undefweak
1926 		      || h->root.type == bfd_link_hash_undefined))))
1927 	{
1928 	  /* Make sure this symbol is output as a dynamic symbol.
1929 	     Undefined weak syms won't yet be marked as dynamic.  */
1930 	  if (h->dynindx == -1
1931 	      && !h->forced_local)
1932 	    {
1933 	      if (! bfd_elf_link_record_dynamic_symbol (info, h))
1934 		return FALSE;
1935 	    }
1936 
1937 	  /* If that succeeded, we know we'll be keeping all the
1938 	     relocs.  */
1939 	  if (h->dynindx != -1)
1940 	    goto keep;
1941 	}
1942 
1943       eh->dyn_relocs = NULL;
1944 
1945     keep: ;
1946     }
1947 
1948   /* Finally, allocate space.  */
1949   for (p = eh->dyn_relocs; p != NULL; p = p->next)
1950     {
1951       asection *sreloc = elf_section_data (p->sec)->sreloc;
1952 
1953       sreloc->size += p->count * sizeof (Elf32_External_Rela);
1954     }
1955 
1956   return TRUE;
1957 }
1958 
1959 /* Find any dynamic relocs that apply to read-only sections.  */
1960 
1961 static bfd_boolean
readonly_dynrelocs(struct elf_link_hash_entry * h,void * inf)1962 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1963 {
1964   struct elf_s390_link_hash_entry *eh;
1965   struct elf_dyn_relocs *p;
1966 
1967   eh = (struct elf_s390_link_hash_entry *) h;
1968   for (p = eh->dyn_relocs; p != NULL; p = p->next)
1969     {
1970       asection *s = p->sec->output_section;
1971 
1972       if (s != NULL && (s->flags & SEC_READONLY) != 0)
1973 	{
1974 	  struct bfd_link_info *info = (struct bfd_link_info *) inf;
1975 
1976 	  info->flags |= DF_TEXTREL;
1977 
1978 	  /* Not an error, just cut short the traversal.  */
1979 	  return FALSE;
1980 	}
1981     }
1982   return TRUE;
1983 }
1984 
1985 /* Set the sizes of the dynamic sections.  */
1986 
1987 static bfd_boolean
elf_s390_size_dynamic_sections(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)1988 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1989 				struct bfd_link_info *info)
1990 {
1991   struct elf_s390_link_hash_table *htab;
1992   bfd *dynobj;
1993   asection *s;
1994   bfd_boolean relocs;
1995   bfd *ibfd;
1996 
1997   htab = elf_s390_hash_table (info);
1998   dynobj = htab->elf.dynobj;
1999   if (dynobj == NULL)
2000     abort ();
2001 
2002   if (htab->elf.dynamic_sections_created)
2003     {
2004       /* Set the contents of the .interp section to the interpreter.  */
2005       if (info->executable)
2006 	{
2007 	  s = bfd_get_linker_section (dynobj, ".interp");
2008 	  if (s == NULL)
2009 	    abort ();
2010 	  s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2011 	  s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2012 	}
2013     }
2014 
2015   /* Set up .got offsets for local syms, and space for local dynamic
2016      relocs.  */
2017   for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2018     {
2019       bfd_signed_vma *local_got;
2020       bfd_signed_vma *end_local_got;
2021       char *local_tls_type;
2022       bfd_size_type locsymcount;
2023       Elf_Internal_Shdr *symtab_hdr;
2024       asection *srela;
2025       struct plt_entry *local_plt;
2026       unsigned int i;
2027 
2028       if (! is_s390_elf (ibfd))
2029 	continue;
2030 
2031       for (s = ibfd->sections; s != NULL; s = s->next)
2032 	{
2033 	  struct elf_dyn_relocs *p;
2034 
2035 	  for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2036 	    {
2037 	      if (!bfd_is_abs_section (p->sec)
2038 		  && bfd_is_abs_section (p->sec->output_section))
2039 		{
2040 		  /* Input section has been discarded, either because
2041 		     it is a copy of a linkonce section or due to
2042 		     linker script /DISCARD/, so we'll be discarding
2043 		     the relocs too.  */
2044 		}
2045 	      else if (p->count != 0)
2046 		{
2047 		  srela = elf_section_data (p->sec)->sreloc;
2048 		  srela->size += p->count * sizeof (Elf32_External_Rela);
2049 		  if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2050 		    info->flags |= DF_TEXTREL;
2051 		}
2052 	    }
2053 	}
2054 
2055       local_got = elf_local_got_refcounts (ibfd);
2056       if (!local_got)
2057 	continue;
2058 
2059       symtab_hdr = &elf_symtab_hdr (ibfd);
2060       locsymcount = symtab_hdr->sh_info;
2061       end_local_got = local_got + locsymcount;
2062       local_tls_type = elf_s390_local_got_tls_type (ibfd);
2063       s = htab->elf.sgot;
2064       srela = htab->elf.srelgot;
2065       for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2066 	{
2067 	  if (*local_got > 0)
2068 	    {
2069 	      *local_got = s->size;
2070 	      s->size += GOT_ENTRY_SIZE;
2071 	      if (*local_tls_type == GOT_TLS_GD)
2072 		s->size += GOT_ENTRY_SIZE;
2073 	      if (info->shared)
2074 		srela->size += sizeof (Elf32_External_Rela);
2075 	    }
2076 	  else
2077 	    *local_got = (bfd_vma) -1;
2078 	}
2079       local_plt = elf_s390_local_plt (ibfd);
2080       for (i = 0; i < symtab_hdr->sh_info; i++)
2081 	{
2082 	  if (local_plt[i].plt.refcount > 0)
2083 	    {
2084 	      local_plt[i].plt.offset = htab->elf.iplt->size;
2085 	      htab->elf.iplt->size += PLT_ENTRY_SIZE;
2086 	      htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2087 	      htab->elf.irelplt->size += RELA_ENTRY_SIZE;
2088 	    }
2089 	  else
2090             local_plt[i].plt.offset = (bfd_vma) -1;
2091 	}
2092     }
2093 
2094   if (htab->tls_ldm_got.refcount > 0)
2095     {
2096       /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2097 	 relocs.  */
2098       htab->tls_ldm_got.offset = htab->elf.sgot->size;
2099       htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2100       htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
2101     }
2102   else
2103     htab->tls_ldm_got.offset = -1;
2104 
2105   /* Allocate global sym .plt and .got entries, and space for global
2106      sym dynamic relocs.  */
2107   elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2108 
2109   /* We now have determined the sizes of the various dynamic sections.
2110      Allocate memory for them.  */
2111   relocs = FALSE;
2112   for (s = dynobj->sections; s != NULL; s = s->next)
2113     {
2114       if ((s->flags & SEC_LINKER_CREATED) == 0)
2115 	continue;
2116 
2117       if (s == htab->elf.splt
2118 	  || s == htab->elf.sgot
2119 	  || s == htab->elf.sgotplt
2120 	  || s == htab->sdynbss
2121 	  || s == htab->elf.iplt
2122 	  || s == htab->elf.igotplt
2123 	  || s == htab->irelifunc)
2124 	{
2125 	  /* Strip this section if we don't need it; see the
2126 	     comment below.  */
2127 	}
2128       else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2129 	{
2130 	  if (s->size != 0)
2131 	    relocs = TRUE;
2132 
2133 	  /* We use the reloc_count field as a counter if we need
2134 	     to copy relocs into the output file.  */
2135 	  s->reloc_count = 0;
2136 	}
2137       else
2138 	{
2139 	  /* It's not one of our sections, so don't allocate space.  */
2140 	  continue;
2141 	}
2142 
2143       if (s->size == 0)
2144 	{
2145 	  /* If we don't need this section, strip it from the
2146 	     output file.  This is to handle .rela.bss and
2147 	     .rela.plt.  We must create it in
2148 	     create_dynamic_sections, because it must be created
2149 	     before the linker maps input sections to output
2150 	     sections.  The linker does that before
2151 	     adjust_dynamic_symbol is called, and it is that
2152 	     function which decides whether anything needs to go
2153 	     into these sections.  */
2154 
2155 	  s->flags |= SEC_EXCLUDE;
2156 	  continue;
2157 	}
2158 
2159       if ((s->flags & SEC_HAS_CONTENTS) == 0)
2160 	continue;
2161 
2162       /* Allocate memory for the section contents.  We use bfd_zalloc
2163 	 here in case unused entries are not reclaimed before the
2164 	 section's contents are written out.  This should not happen,
2165 	 but this way if it does, we get a R_390_NONE reloc instead
2166 	 of garbage.  */
2167       s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2168       if (s->contents == NULL)
2169 	return FALSE;
2170     }
2171 
2172   if (htab->elf.dynamic_sections_created)
2173     {
2174       /* Add some entries to the .dynamic section.  We fill in the
2175 	 values later, in elf_s390_finish_dynamic_sections, but we
2176 	 must add the entries now so that we get the correct size for
2177 	 the .dynamic section.  The DT_DEBUG entry is filled in by the
2178 	 dynamic linker and used by the debugger.  */
2179 #define add_dynamic_entry(TAG, VAL) \
2180   _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2181 
2182       if (info->executable)
2183 	{
2184 	  if (!add_dynamic_entry (DT_DEBUG, 0))
2185 	    return FALSE;
2186 	}
2187 
2188       if (htab->elf.splt->size != 0)
2189 	{
2190 	  if (!add_dynamic_entry (DT_PLTGOT, 0)
2191 	      || !add_dynamic_entry (DT_PLTRELSZ, 0)
2192 	      || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2193 	      || !add_dynamic_entry (DT_JMPREL, 0))
2194 	    return FALSE;
2195 	}
2196 
2197       if (relocs)
2198 	{
2199 	  if (!add_dynamic_entry (DT_RELA, 0)
2200 	      || !add_dynamic_entry (DT_RELASZ, 0)
2201 	      || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2202 	    return FALSE;
2203 
2204 	  /* If any dynamic relocs apply to a read-only section,
2205 	     then we need a DT_TEXTREL entry.  */
2206 	  if ((info->flags & DF_TEXTREL) == 0)
2207 	    elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
2208 
2209 	  if ((info->flags & DF_TEXTREL) != 0)
2210 	    {
2211 	      if (!add_dynamic_entry (DT_TEXTREL, 0))
2212 		return FALSE;
2213 	    }
2214 	}
2215     }
2216 #undef add_dynamic_entry
2217 
2218   return TRUE;
2219 }
2220 
2221 /* Return the base VMA address which should be subtracted from real addresses
2222    when resolving @dtpoff relocation.
2223    This is PT_TLS segment p_vaddr.  */
2224 
2225 static bfd_vma
dtpoff_base(struct bfd_link_info * info)2226 dtpoff_base (struct bfd_link_info *info)
2227 {
2228   /* If tls_sec is NULL, we should have signalled an error already.  */
2229   if (elf_hash_table (info)->tls_sec == NULL)
2230     return 0;
2231   return elf_hash_table (info)->tls_sec->vma;
2232 }
2233 
2234 /* Return the relocation value for @tpoff relocation
2235    if STT_TLS virtual address is ADDRESS.  */
2236 
2237 static bfd_vma
tpoff(struct bfd_link_info * info,bfd_vma address)2238 tpoff (struct bfd_link_info *info, bfd_vma address)
2239 {
2240   struct elf_link_hash_table *htab = elf_hash_table (info);
2241 
2242   /* If tls_sec is NULL, we should have signalled an error already.  */
2243   if (htab->tls_sec == NULL)
2244     return 0;
2245   return htab->tls_size + htab->tls_sec->vma - address;
2246 }
2247 
2248 /* Complain if TLS instruction relocation is against an invalid
2249    instruction.  */
2250 
2251 static void
invalid_tls_insn(bfd * input_bfd,asection * input_section,Elf_Internal_Rela * rel)2252 invalid_tls_insn (bfd *input_bfd,
2253 		  asection *input_section,
2254 		  Elf_Internal_Rela *rel)
2255 {
2256   reloc_howto_type *howto;
2257 
2258   howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2259   (*_bfd_error_handler)
2260     (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2261      input_bfd,
2262      input_section,
2263      (long) rel->r_offset,
2264      howto->name);
2265   bfd_set_error (bfd_error_bad_value);
2266 }
2267 
2268 /* Relocate a 390 ELF section.  */
2269 
2270 static bfd_boolean
elf_s390_relocate_section(bfd * output_bfd,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)2271 elf_s390_relocate_section (bfd *output_bfd,
2272 			   struct bfd_link_info *info,
2273 			   bfd *input_bfd,
2274 			   asection *input_section,
2275 			   bfd_byte *contents,
2276 			   Elf_Internal_Rela *relocs,
2277 			   Elf_Internal_Sym *local_syms,
2278 			   asection **local_sections)
2279 {
2280   struct elf_s390_link_hash_table *htab;
2281   Elf_Internal_Shdr *symtab_hdr;
2282   struct elf_link_hash_entry **sym_hashes;
2283   bfd_vma *local_got_offsets;
2284   Elf_Internal_Rela *rel;
2285   Elf_Internal_Rela *relend;
2286 
2287   BFD_ASSERT (is_s390_elf (input_bfd));
2288 
2289   htab = elf_s390_hash_table (info);
2290   symtab_hdr = &elf_symtab_hdr (input_bfd);
2291   sym_hashes = elf_sym_hashes (input_bfd);
2292   local_got_offsets = elf_local_got_offsets (input_bfd);
2293 
2294   rel = relocs;
2295   relend = relocs + input_section->reloc_count;
2296   for (; rel < relend; rel++)
2297     {
2298       unsigned int r_type;
2299       reloc_howto_type *howto;
2300       unsigned long r_symndx;
2301       struct elf_link_hash_entry *h;
2302       Elf_Internal_Sym *sym;
2303       asection *sec;
2304       bfd_vma off;
2305       bfd_vma relocation;
2306       bfd_boolean unresolved_reloc;
2307       bfd_reloc_status_type r;
2308       int tls_type;
2309       asection *base_got = htab->elf.sgot;
2310 
2311       r_type = ELF32_R_TYPE (rel->r_info);
2312       if (r_type == (int) R_390_GNU_VTINHERIT
2313 	  || r_type == (int) R_390_GNU_VTENTRY)
2314 	continue;
2315       if (r_type >= (int) R_390_max)
2316 	{
2317 	  bfd_set_error (bfd_error_bad_value);
2318 	  return FALSE;
2319 	}
2320 
2321       howto = elf_howto_table + r_type;
2322       r_symndx = ELF32_R_SYM (rel->r_info);
2323 
2324       h = NULL;
2325       sym = NULL;
2326       sec = NULL;
2327       unresolved_reloc = FALSE;
2328       if (r_symndx < symtab_hdr->sh_info)
2329 	{
2330 	  sym = local_syms + r_symndx;
2331 	  sec = local_sections[r_symndx];
2332 	  if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2333 	    {
2334 	      struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2335 	      if (local_plt == NULL)
2336 		return FALSE;
2337 
2338 	      /* Address of the PLT slot.  */
2339 	      relocation = (htab->elf.iplt->output_section->vma
2340 			    + htab->elf.iplt->output_offset
2341 			    + local_plt[r_symndx].plt.offset);
2342 
2343 	      switch (r_type)
2344 		{
2345 		case R_390_PLTOFF16:
2346 		case R_390_PLTOFF32:
2347 		  relocation -= htab->elf.sgot->output_section->vma;
2348 		  break;
2349 		case R_390_GOTPLT12:
2350 		case R_390_GOTPLT16:
2351 		case R_390_GOTPLT20:
2352 		case R_390_GOTPLT32:
2353 		case R_390_GOTPLTENT:
2354 		case R_390_GOT12:
2355 		case R_390_GOT16:
2356 		case R_390_GOT20:
2357 		case R_390_GOT32:
2358 		case R_390_GOTENT:
2359 		  {
2360 		    /* Write the PLT slot address into the GOT slot.  */
2361 		    bfd_put_32 (output_bfd, relocation,
2362 				htab->elf.sgot->contents +
2363 				local_got_offsets[r_symndx]);
2364 		    relocation = (local_got_offsets[r_symndx] +
2365 				  htab->elf.sgot->output_offset);
2366 
2367 		    if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2368 		      relocation += htab->elf.sgot->output_section->vma;
2369 		    break;
2370 		  }
2371 		default:
2372 		  break;
2373 		}
2374 	      /* The output section is needed later in
2375 		 finish_dynamic_section when creating the dynamic
2376 		 relocation.  */
2377 	      local_plt[r_symndx].sec = sec;
2378 	      goto do_relocation;
2379 	    }
2380 	  else
2381 	    relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2382 	}
2383       else
2384 	{
2385 	  bfd_boolean warned ATTRIBUTE_UNUSED;
2386 
2387 	  RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2388 				   r_symndx, symtab_hdr, sym_hashes,
2389 				   h, sec, relocation,
2390 				   unresolved_reloc, warned);
2391 	}
2392 
2393       if (sec != NULL && discarded_section (sec))
2394 	RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2395 					 rel, 1, relend, howto, 0, contents);
2396 
2397       if (info->relocatable)
2398 	continue;
2399 
2400       switch (r_type)
2401 	{
2402 	case R_390_GOTPLT12:
2403 	case R_390_GOTPLT16:
2404 	case R_390_GOTPLT20:
2405 	case R_390_GOTPLT32:
2406 	case R_390_GOTPLTENT:
2407 	  /* There are three cases for a GOTPLT relocation. 1) The
2408 	     relocation is against the jump slot entry of a plt that
2409 	     will get emitted to the output file. 2) The relocation
2410 	     is against the jump slot of a plt entry that has been
2411 	     removed. elf_s390_adjust_gotplt has created a GOT entry
2412 	     as replacement. 3) The relocation is against a local symbol.
2413 	     Cases 2) and 3) are the same as the GOT relocation code
2414 	     so we just have to test for case 1 and fall through for
2415 	     the other two.  */
2416 	  if (h != NULL && h->plt.offset != (bfd_vma) -1)
2417 	    {
2418 	      bfd_vma plt_index;
2419 
2420 	      if (s390_is_ifunc_symbol_p (h))
2421 		{
2422 		  plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2423 		  relocation = (plt_index * GOT_ENTRY_SIZE +
2424 				htab->elf.igotplt->output_offset);
2425 		  if (r_type == R_390_GOTPLTENT)
2426 		    relocation += htab->elf.igotplt->output_section->vma;
2427 		}
2428 	      else
2429 		{
2430 		  /* Calc. index no.
2431 		     Current offset - size first entry / entry size.  */
2432 		  plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2433 		    PLT_ENTRY_SIZE;
2434 
2435 		  /* Offset in GOT is PLT index plus GOT headers(3)
2436 		     times 4, addr & GOT addr.  */
2437 		  relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2438 		  if (r_type == R_390_GOTPLTENT)
2439 		    relocation += htab->elf.sgot->output_section->vma;
2440 		}
2441 	      unresolved_reloc = FALSE;
2442 
2443 	    }
2444 	  /* Fall through.  */
2445 
2446 	case R_390_GOT12:
2447 	case R_390_GOT16:
2448 	case R_390_GOT20:
2449 	case R_390_GOT32:
2450 	case R_390_GOTENT:
2451 	  /* Relocation is to the entry for this symbol in the global
2452 	     offset table.  */
2453 	  if (base_got == NULL)
2454 	    abort ();
2455 
2456 	  if (h != NULL)
2457 	    {
2458 	      bfd_boolean dyn;
2459 
2460 	      off = h->got.offset;
2461 	      dyn = htab->elf.dynamic_sections_created;
2462 
2463 	      if (s390_is_ifunc_symbol_p (h))
2464 		{
2465 		  BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2466 		  if (off == (bfd_vma)-1)
2467 		    {
2468 		      /* No explicit GOT usage so redirect to the
2469 			 got.iplt slot.  */
2470 		      base_got = htab->elf.igotplt;
2471 		      off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2472 		    }
2473 		  else
2474 		    {
2475 		      /* Explicit GOT slots must contain the address
2476 			 of the PLT slot. This will be handled in
2477 			 finish_dynamic_symbol.  */
2478 		    }
2479 		}
2480 	      else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2481 		       || (info->shared
2482 			   && SYMBOL_REFERENCES_LOCAL (info, h))
2483 		       || (ELF_ST_VISIBILITY (h->other)
2484 			   && h->root.type == bfd_link_hash_undefweak))
2485 
2486 		{
2487 		  /* This is actually a static link, or it is a
2488 		     -Bsymbolic link and the symbol is defined
2489 		     locally, or the symbol was forced to be local
2490 		     because of a version file.  We must initialize
2491 		     this entry in the global offset table.  Since the
2492 		     offset must always be a multiple of 2, we use the
2493 		     least significant bit to record whether we have
2494 		     initialized it already.
2495 
2496 		     When doing a dynamic link, we create a .rel.got
2497 		     relocation entry to initialize the value.  This
2498 		     is done in the finish_dynamic_symbol routine.  */
2499 		  if ((off & 1) != 0)
2500 		    off &= ~1;
2501 		  else
2502 		    {
2503 		      bfd_put_32 (output_bfd, relocation,
2504 				  base_got->contents + off);
2505 		      h->got.offset |= 1;
2506 		    }
2507 		}
2508 	      else
2509 		unresolved_reloc = FALSE;
2510 	    }
2511 	  else
2512 	    {
2513 	      if (local_got_offsets == NULL)
2514 		abort ();
2515 
2516 	      off = local_got_offsets[r_symndx];
2517 
2518 	      /* The offset must always be a multiple of 4.  We use
2519 		 the least significant bit to record whether we have
2520 		 already generated the necessary reloc.  */
2521 	      if ((off & 1) != 0)
2522 		off &= ~1;
2523 	      else
2524 		{
2525 		  bfd_put_32 (output_bfd, relocation,
2526 			      htab->elf.sgot->contents + off);
2527 
2528 		  if (info->shared)
2529 		    {
2530 		      asection *srelgot;
2531 		      Elf_Internal_Rela outrel;
2532 		      bfd_byte *loc;
2533 
2534 		      srelgot = htab->elf.srelgot;
2535 		      if (srelgot == NULL)
2536 			abort ();
2537 
2538 		      outrel.r_offset = (htab->elf.sgot->output_section->vma
2539 					 + htab->elf.sgot->output_offset
2540 					 + off);
2541 		      outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2542 		      outrel.r_addend = relocation;
2543 		      loc = srelgot->contents;
2544 		      loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2545 		      bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2546 		    }
2547 
2548 		  local_got_offsets[r_symndx] |= 1;
2549 		}
2550 	    }
2551 
2552 	  if (off >= (bfd_vma) -2)
2553 	    abort ();
2554 
2555 	  relocation = base_got->output_offset + off;
2556 
2557 	  /* For @GOTENT the relocation is against the offset between
2558 	     the instruction and the symbols entry in the GOT and not
2559 	     between the start of the GOT and the symbols entry. We
2560 	     add the vma of the GOT to get the correct value.  */
2561 	  if (   r_type == R_390_GOTENT
2562 	      || r_type == R_390_GOTPLTENT)
2563 	    relocation += base_got->output_section->vma;
2564 
2565 	  break;
2566 
2567 	case R_390_GOTOFF16:
2568 	case R_390_GOTOFF32:
2569 	  /* Relocation is relative to the start of the global offset
2570 	     table.  */
2571 
2572 	  /* Note that sgot->output_offset is not involved in this
2573 	     calculation.  We always want the start of .got.  If we
2574 	     defined _GLOBAL_OFFSET_TABLE in a different way, as is
2575 	     permitted by the ABI, we might have to change this
2576 	     calculation.  */
2577 	  relocation -= htab->elf.sgot->output_section->vma;
2578 	  break;
2579 
2580 	case R_390_GOTPC:
2581 	case R_390_GOTPCDBL:
2582 	  /* Use global offset table as symbol value.  */
2583 	  relocation = htab->elf.sgot->output_section->vma;
2584 	  unresolved_reloc = FALSE;
2585 	  break;
2586 
2587 	case R_390_PLT16DBL:
2588 	case R_390_PLT32DBL:
2589 	case R_390_PLT32:
2590 	  /* Relocation is to the entry for this symbol in the
2591 	     procedure linkage table.  */
2592 
2593 	  /* Resolve a PLT32 reloc against a local symbol directly,
2594 	     without using the procedure linkage table.  */
2595 	  if (h == NULL)
2596 	    break;
2597 
2598 	  if (h->plt.offset == (bfd_vma) -1
2599 	      || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2600 	    {
2601 	      /* We didn't make a PLT entry for this symbol.  This
2602 		 happens when statically linking PIC code, or when
2603 		 using -Bsymbolic.  */
2604 	      break;
2605 	    }
2606 
2607 	  if (s390_is_ifunc_symbol_p (h))
2608 	    relocation = (htab->elf.iplt->output_section->vma
2609                           + htab->elf.iplt->output_offset
2610 			  + h->plt.offset);
2611 	  else
2612 	    relocation = (htab->elf.splt->output_section->vma
2613 			  + htab->elf.splt->output_offset
2614 			  + h->plt.offset);
2615 	  unresolved_reloc = FALSE;
2616 	  break;
2617 
2618 	case R_390_PLTOFF16:
2619 	case R_390_PLTOFF32:
2620 	  /* Relocation is to the entry for this symbol in the
2621 	     procedure linkage table relative to the start of the GOT.  */
2622 
2623 	  /* For local symbols or if we didn't make a PLT entry for
2624 	     this symbol resolve the symbol directly.  */
2625 	  if (h == NULL
2626 	      || h->plt.offset == (bfd_vma) -1
2627 	      || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2628 	    {
2629 	      relocation -= htab->elf.sgot->output_section->vma;
2630 	      break;
2631 	    }
2632 
2633 	  if (s390_is_ifunc_symbol_p (h))
2634 	    relocation = (htab->elf.iplt->output_section->vma
2635 			  + htab->elf.iplt->output_offset
2636 			  + h->plt.offset
2637 			  - htab->elf.sgot->output_section->vma);
2638 	  else
2639 	    relocation = (htab->elf.splt->output_section->vma
2640 			  + htab->elf.splt->output_offset
2641 			  + h->plt.offset
2642 			  - htab->elf.sgot->output_section->vma);
2643 	  unresolved_reloc = FALSE;
2644 	  break;
2645 
2646 	case R_390_8:
2647 	case R_390_16:
2648 	case R_390_32:
2649 	case R_390_PC16:
2650 	case R_390_PC16DBL:
2651 	case R_390_PC32DBL:
2652 	case R_390_PC32:
2653 	  if (h != NULL
2654 	      && s390_is_ifunc_symbol_p (h)
2655 	      && h->def_regular)
2656 	    {
2657 	      if (!info->shared || !h->non_got_ref)
2658 		{
2659 		  /* For a non-shared object STT_GNU_IFUNC symbol must
2660 		     go through PLT.  */
2661 		  relocation = (htab->elf.iplt->output_section->vma
2662 				+ htab->elf.iplt->output_offset
2663 				+ h ->plt.offset);
2664 		  goto do_relocation;
2665 		}
2666 	      else
2667 		{
2668 		  /* For shared objects a runtime relocation is needed.  */
2669 
2670 		  Elf_Internal_Rela outrel;
2671 		  asection *sreloc;
2672 
2673 		  /* Need a dynamic relocation to get the real function
2674 		     address.  */
2675 		  outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2676 							     info,
2677 							     input_section,
2678 							     rel->r_offset);
2679 		  if (outrel.r_offset == (bfd_vma) -1
2680 		      || outrel.r_offset == (bfd_vma) -2)
2681 		    abort ();
2682 
2683 		  outrel.r_offset += (input_section->output_section->vma
2684 				      + input_section->output_offset);
2685 
2686 		  if (h->dynindx == -1
2687 		      || h->forced_local
2688 		      || info->executable)
2689 		    {
2690 		      /* This symbol is resolved locally.  */
2691 		      outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2692 		      outrel.r_addend = (h->root.u.def.value
2693 					 + h->root.u.def.section->output_section->vma
2694 					 + h->root.u.def.section->output_offset);
2695 		    }
2696 		  else
2697 		    {
2698 		      outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2699 		      outrel.r_addend = 0;
2700 		    }
2701 
2702 		  sreloc = htab->elf.irelifunc;
2703 		  elf_append_rela (output_bfd, sreloc, &outrel);
2704 
2705 		  /* If this reloc is against an external symbol, we
2706 		     do not want to fiddle with the addend.  Otherwise,
2707 		     we need to include the symbol value so that it
2708 		     becomes an addend for the dynamic reloc.  For an
2709 		     internal symbol, we have updated addend.  */
2710 		  continue;
2711 		}
2712 	    }
2713 
2714 	  if ((input_section->flags & SEC_ALLOC) == 0)
2715 	    break;
2716 
2717 	  if ((info->shared
2718 	       && (h == NULL
2719 		   || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2720 		   || h->root.type != bfd_link_hash_undefweak)
2721 	       && ((r_type != R_390_PC16
2722 		    && r_type != R_390_PC16DBL
2723 		    && r_type != R_390_PC32DBL
2724 		    && r_type != R_390_PC32)
2725 		   || !SYMBOL_CALLS_LOCAL (info, h)))
2726 	      || (ELIMINATE_COPY_RELOCS
2727 		  && !info->shared
2728 		  && h != NULL
2729 		  && h->dynindx != -1
2730 		  && !h->non_got_ref
2731 		  && ((h->def_dynamic
2732 		       && !h->def_regular)
2733 		      || h->root.type == bfd_link_hash_undefweak
2734 		      || h->root.type == bfd_link_hash_undefined)))
2735 	    {
2736 	      Elf_Internal_Rela outrel;
2737 	      bfd_boolean skip, relocate;
2738 	      asection *sreloc;
2739 	      bfd_byte *loc;
2740 
2741 	      /* When generating a shared object, these relocations
2742 		 are copied into the output file to be resolved at run
2743 		 time.  */
2744 
2745 	      skip = FALSE;
2746 	      relocate = FALSE;
2747 
2748 	      outrel.r_offset =
2749 		_bfd_elf_section_offset (output_bfd, info, input_section,
2750 					 rel->r_offset);
2751 	      if (outrel.r_offset == (bfd_vma) -1)
2752 		skip = TRUE;
2753 	      else if (outrel.r_offset == (bfd_vma) -2)
2754 		skip = TRUE, relocate = TRUE;
2755 	      outrel.r_offset += (input_section->output_section->vma
2756 				  + input_section->output_offset);
2757 
2758 	      if (skip)
2759 		memset (&outrel, 0, sizeof outrel);
2760 	      else if (h != NULL
2761 		       && h->dynindx != -1
2762 		       && (r_type == R_390_PC16
2763 			   || r_type == R_390_PC16DBL
2764 			   || r_type == R_390_PC32DBL
2765 			   || r_type == R_390_PC32
2766 			   || !info->shared
2767 			   || !SYMBOLIC_BIND (info, h)
2768 			   || !h->def_regular))
2769 		{
2770 		  outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2771 		  outrel.r_addend = rel->r_addend;
2772 		}
2773 	      else
2774 		{
2775 		  /* This symbol is local, or marked to become local.  */
2776 		  outrel.r_addend = relocation + rel->r_addend;
2777 		  if (r_type == R_390_32)
2778 		    {
2779 		      relocate = TRUE;
2780 		      outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2781 		    }
2782 		  else
2783 		    {
2784 		      long sindx;
2785 
2786 		      if (bfd_is_abs_section (sec))
2787 			sindx = 0;
2788 		      else if (sec == NULL || sec->owner == NULL)
2789 			{
2790 			  bfd_set_error(bfd_error_bad_value);
2791 			  return FALSE;
2792 			}
2793 		      else
2794 			{
2795 			  asection *osec;
2796 
2797 			  osec = sec->output_section;
2798 			  sindx = elf_section_data (osec)->dynindx;
2799 			  if (sindx == 0)
2800 			    {
2801 			      osec = htab->elf.text_index_section;
2802 			      sindx = elf_section_data (osec)->dynindx;
2803 			    }
2804 			  BFD_ASSERT (sindx != 0);
2805 
2806 			  /* We are turning this relocation into one
2807 			     against a section symbol, so subtract out
2808 			     the output section's address but not the
2809 			     offset of the input section in the output
2810 			     section.  */
2811 			  outrel.r_addend -= osec->vma;
2812 			}
2813 		      outrel.r_info = ELF32_R_INFO (sindx, r_type);
2814 		    }
2815 		}
2816 
2817 	      sreloc = elf_section_data (input_section)->sreloc;
2818 	      if (sreloc == NULL)
2819 		abort ();
2820 
2821 	      loc = sreloc->contents;
2822 	      loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2823 	      bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2824 
2825 	      /* If this reloc is against an external symbol, we do
2826 		 not want to fiddle with the addend.  Otherwise, we
2827 		 need to include the symbol value so that it becomes
2828 		 an addend for the dynamic reloc.  */
2829 	      if (! relocate)
2830 		continue;
2831 	    }
2832 	  break;
2833 
2834 	  /* Relocations for tls literal pool entries.  */
2835 	case R_390_TLS_IE32:
2836 	  if (info->shared)
2837 	    {
2838 	      Elf_Internal_Rela outrel;
2839 	      asection *sreloc;
2840 	      bfd_byte *loc;
2841 
2842 	      outrel.r_offset = rel->r_offset
2843 				+ input_section->output_section->vma
2844 				+ input_section->output_offset;
2845 	      outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2846 	      sreloc = elf_section_data (input_section)->sreloc;
2847 	      if (sreloc == NULL)
2848 		abort ();
2849 	      loc = sreloc->contents;
2850 	      loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2851 	      bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2852 	    }
2853 	  /* Fall through.  */
2854 
2855 	case R_390_TLS_GD32:
2856 	case R_390_TLS_GOTIE32:
2857 	  r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2858 	  tls_type = GOT_UNKNOWN;
2859 	  if (h == NULL && local_got_offsets)
2860 	    tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2861 	  else if (h != NULL)
2862 	    {
2863 	      tls_type = elf_s390_hash_entry(h)->tls_type;
2864 	      if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2865 		r_type = R_390_TLS_LE32;
2866 	    }
2867 	  if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2868 	    r_type = R_390_TLS_IE32;
2869 
2870 	  if (r_type == R_390_TLS_LE32)
2871 	    {
2872 	      /* This relocation gets optimized away by the local exec
2873 		 access optimization.  */
2874 	      BFD_ASSERT (! unresolved_reloc);
2875 	      bfd_put_32 (output_bfd, -tpoff (info, relocation),
2876 			  contents + rel->r_offset);
2877 	      continue;
2878 	    }
2879 
2880 	  if (htab->elf.sgot == NULL)
2881 	    abort ();
2882 
2883 	  if (h != NULL)
2884 	    off = h->got.offset;
2885 	  else
2886 	    {
2887 	      if (local_got_offsets == NULL)
2888 		abort ();
2889 
2890 	      off = local_got_offsets[r_symndx];
2891 	    }
2892 
2893 	emit_tls_relocs:
2894 
2895 	  if ((off & 1) != 0)
2896 	    off &= ~1;
2897 	  else
2898 	    {
2899 	      Elf_Internal_Rela outrel;
2900 	      bfd_byte *loc;
2901 	      int dr_type, indx;
2902 
2903 	      if (htab->elf.srelgot == NULL)
2904 		abort ();
2905 
2906 	      outrel.r_offset = (htab->elf.sgot->output_section->vma
2907 				 + htab->elf.sgot->output_offset + off);
2908 
2909 	      indx = h && h->dynindx != -1 ? h->dynindx : 0;
2910 	      if (r_type == R_390_TLS_GD32)
2911 		dr_type = R_390_TLS_DTPMOD;
2912 	      else
2913 		dr_type = R_390_TLS_TPOFF;
2914 	      if (dr_type == R_390_TLS_TPOFF && indx == 0)
2915 		outrel.r_addend = relocation - dtpoff_base (info);
2916 	      else
2917 		outrel.r_addend = 0;
2918 	      outrel.r_info = ELF32_R_INFO (indx, dr_type);
2919 	      loc = htab->elf.srelgot->contents;
2920 	      loc += htab->elf.srelgot->reloc_count++
2921 		* sizeof (Elf32_External_Rela);
2922 	      bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2923 
2924 	      if (r_type == R_390_TLS_GD32)
2925 		{
2926 		  if (indx == 0)
2927 		    {
2928 		      BFD_ASSERT (! unresolved_reloc);
2929 		      bfd_put_32 (output_bfd,
2930 				  relocation - dtpoff_base (info),
2931 				  htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2932 		    }
2933 		  else
2934 		    {
2935 		      outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2936 		      outrel.r_offset += GOT_ENTRY_SIZE;
2937 		      outrel.r_addend = 0;
2938 		      htab->elf.srelgot->reloc_count++;
2939 		      loc += sizeof (Elf32_External_Rela);
2940 		      bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2941 		    }
2942 		}
2943 
2944 	      if (h != NULL)
2945 		h->got.offset |= 1;
2946 	      else
2947 		local_got_offsets[r_symndx] |= 1;
2948 	    }
2949 
2950 	  if (off >= (bfd_vma) -2)
2951 	    abort ();
2952 	  if (r_type == ELF32_R_TYPE (rel->r_info))
2953 	    {
2954 	      relocation = htab->elf.sgot->output_offset + off;
2955 	      if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2956 		relocation += htab->elf.sgot->output_section->vma;
2957 	      unresolved_reloc = FALSE;
2958 	    }
2959 	  else
2960 	    {
2961 	      bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
2962 			  contents + rel->r_offset);
2963 	      continue;
2964 	    }
2965 	  break;
2966 
2967 	case R_390_TLS_GOTIE12:
2968 	case R_390_TLS_GOTIE20:
2969 	case R_390_TLS_IEENT:
2970 	  if (h == NULL)
2971 	    {
2972 	      if (local_got_offsets == NULL)
2973 		abort();
2974 	      off = local_got_offsets[r_symndx];
2975 	      if (info->shared)
2976 		goto emit_tls_relocs;
2977 	    }
2978 	  else
2979 	    {
2980 	      off = h->got.offset;
2981 	      tls_type = elf_s390_hash_entry(h)->tls_type;
2982 	      if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2983 		goto emit_tls_relocs;
2984 	    }
2985 
2986 	  if (htab->elf.sgot == NULL)
2987 	    abort ();
2988 
2989 	  BFD_ASSERT (! unresolved_reloc);
2990 	  bfd_put_32 (output_bfd, -tpoff (info, relocation),
2991 		      htab->elf.sgot->contents + off);
2992 	  relocation = htab->elf.sgot->output_offset + off;
2993 	  if (r_type == R_390_TLS_IEENT)
2994 	    relocation += htab->elf.sgot->output_section->vma;
2995 	  unresolved_reloc = FALSE;
2996 	  break;
2997 
2998 	case R_390_TLS_LDM32:
2999 	  if (! info->shared)
3000 	    /* The literal pool entry this relocation refers to gets ignored
3001 	       by the optimized code of the local exec model. Do nothing
3002 	       and the value will turn out zero.  */
3003 	    continue;
3004 
3005 	  if (htab->elf.sgot == NULL)
3006 	    abort ();
3007 
3008 	  off = htab->tls_ldm_got.offset;
3009 	  if (off & 1)
3010 	    off &= ~1;
3011 	  else
3012 	    {
3013 	      Elf_Internal_Rela outrel;
3014 	      bfd_byte *loc;
3015 
3016 	      if (htab->elf.srelgot == NULL)
3017 		abort ();
3018 
3019 	      outrel.r_offset = (htab->elf.sgot->output_section->vma
3020 				 + htab->elf.sgot->output_offset + off);
3021 
3022 	      bfd_put_32 (output_bfd, 0,
3023 			  htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3024 	      outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
3025 	      outrel.r_addend = 0;
3026 	      loc = htab->elf.srelgot->contents;
3027 	      loc += htab->elf.srelgot->reloc_count++
3028 		* sizeof (Elf32_External_Rela);
3029 	      bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3030 	      htab->tls_ldm_got.offset |= 1;
3031 	    }
3032 	  relocation = htab->elf.sgot->output_offset + off;
3033 	  unresolved_reloc = FALSE;
3034 	  break;
3035 
3036 	case R_390_TLS_LE32:
3037 	  if (info->shared)
3038 	    {
3039 	      /* Linking a shared library with non-fpic code requires
3040 		 a R_390_TLS_TPOFF relocation.  */
3041 	      Elf_Internal_Rela outrel;
3042 	      asection *sreloc;
3043 	      bfd_byte *loc;
3044 	      int indx;
3045 
3046 	      outrel.r_offset = rel->r_offset
3047 				+ input_section->output_section->vma
3048 				+ input_section->output_offset;
3049 	      if (h != NULL && h->dynindx != -1)
3050 		indx = h->dynindx;
3051 	      else
3052 		indx = 0;
3053 	      outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3054 	      if (indx == 0)
3055 		outrel.r_addend = relocation - dtpoff_base (info);
3056 	      else
3057 		outrel.r_addend = 0;
3058 	      sreloc = elf_section_data (input_section)->sreloc;
3059 	      if (sreloc == NULL)
3060 		abort ();
3061 	      loc = sreloc->contents;
3062 	      loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3063 	      bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3064 	    }
3065 	  else
3066 	    {
3067 	      BFD_ASSERT (! unresolved_reloc);
3068 	      bfd_put_32 (output_bfd, -tpoff (info, relocation),
3069 			  contents + rel->r_offset);
3070 	    }
3071 	  continue;
3072 
3073 	case R_390_TLS_LDO32:
3074 	  if (info->shared || (input_section->flags & SEC_DEBUGGING))
3075 	    relocation -= dtpoff_base (info);
3076 	  else
3077 	    /* When converting LDO to LE, we must negate.  */
3078 	    relocation = -tpoff (info, relocation);
3079 	  break;
3080 
3081 	  /* Relocations for tls instructions.  */
3082 	case R_390_TLS_LOAD:
3083 	case R_390_TLS_GDCALL:
3084 	case R_390_TLS_LDCALL:
3085 	  tls_type = GOT_UNKNOWN;
3086 	  if (h == NULL && local_got_offsets)
3087 	    tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3088 	  else if (h != NULL)
3089 	    tls_type = elf_s390_hash_entry(h)->tls_type;
3090 
3091 	  if (tls_type == GOT_TLS_GD)
3092 	    continue;
3093 
3094 	  if (r_type == R_390_TLS_LOAD)
3095 	    {
3096 	      if (!info->shared && (h == NULL || h->dynindx == -1))
3097 		{
3098 		  /* IE->LE transition. Four valid cases:
3099 		     l %rx,0(0,%ry)    -> lr %rx,%ry + bcr 0,0
3100 		     l %rx,0(%ry,0)    -> lr %rx,%ry + bcr 0,0
3101 		     l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3102 		     l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3103 		  unsigned int insn, ry;
3104 
3105 		  insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3106 		  ry = 0;
3107 		  if ((insn & 0xff00f000) == 0x58000000)
3108 		    /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0  */
3109 		    ry = (insn & 0x000f0000);
3110 		  else if ((insn & 0xff0f0000) == 0x58000000)
3111 		    /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0  */
3112 		    ry = (insn & 0x0000f000) << 4;
3113 		  else if ((insn & 0xff00f000) == 0x5800c000)
3114 		    /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0  */
3115 		    ry = (insn & 0x000f0000);
3116 		  else if ((insn & 0xff0f0000) == 0x580c0000)
3117 		    /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0  */
3118 		    ry = (insn & 0x0000f000) << 4;
3119 		  else
3120 		    invalid_tls_insn (input_bfd, input_section, rel);
3121 		  insn = 0x18000700 | (insn & 0x00f00000) | ry;
3122 		  bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3123 		}
3124 	    }
3125 	  else if (r_type == R_390_TLS_GDCALL)
3126 	    {
3127 	      unsigned int insn;
3128 
3129 	      insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3130 	      if ((insn & 0xff000fff) != 0x4d000000 &&
3131 		  (insn & 0xffff0000) != 0xc0e50000 &&
3132 		  (insn & 0xff000000) != 0x0d000000)
3133 		invalid_tls_insn (input_bfd, input_section, rel);
3134 	      if (!info->shared && (h == NULL || h->dynindx == -1))
3135 		{
3136 		  if ((insn & 0xff000000) == 0x0d000000)
3137 		    {
3138 		      /* GD->LE transition.
3139 			 basr rx, ry -> nopr r7 */
3140 		      insn = 0x07070000 | (insn & 0xffff);
3141 		    }
3142 		  else if ((insn & 0xff000000) == 0x4d000000)
3143 		    {
3144 		      /* GD->LE transition.
3145 			 bas %r14,0(%rx,%r13) -> bc 0,0  */
3146 		      insn = 0x47000000;
3147 		    }
3148 		  else
3149 		    {
3150 		      /* GD->LE transition.
3151 			 brasl %r14,_tls_get_offset@plt -> brcl 0,.  */
3152 		      insn = 0xc0040000;
3153 		      bfd_put_16 (output_bfd, 0x0000,
3154 				  contents + rel->r_offset + 4);
3155 		    }
3156 		}
3157 	      else
3158 		{
3159 		  /* If basr is used in the pic case to invoke
3160 		     _tls_get_offset, something went wrong before.  */
3161 		  if ((insn & 0xff000000) == 0x0d000000)
3162 		    invalid_tls_insn (input_bfd, input_section, rel);
3163 
3164 		  if ((insn & 0xff000000) == 0x4d000000)
3165 		    {
3166 		      /* GD->IE transition.
3167 			 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12)  */
3168 		      insn = 0x5822c000;
3169 		    }
3170 		  else
3171 		    {
3172 		      /* GD->IE transition.
3173 			 brasl %r14,__tls_get_addr@plt ->
3174 			 	l %r2,0(%r2,%r12) ; bcr 0,0 */
3175 		      insn = 0x5822c000;
3176 		      bfd_put_16 (output_bfd, 0x0700,
3177 				  contents + rel->r_offset + 4);
3178 		    }
3179 		}
3180 	      bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3181 	    }
3182 	  else if (r_type == R_390_TLS_LDCALL)
3183 	    {
3184 	      if (!info->shared)
3185 		{
3186 		  unsigned int insn;
3187 
3188 		  insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3189 		  if ((insn & 0xff000fff) != 0x4d000000 &&
3190 		      (insn & 0xffff0000) != 0xc0e50000 &&
3191 		      (insn & 0xff000000) != 0x0d000000)
3192 		    invalid_tls_insn (input_bfd, input_section, rel);
3193 
3194 		  if ((insn & 0xff000000) == 0x0d000000)
3195 		    {
3196 		      /* LD->LE transition.
3197 			 basr rx, ry -> nopr r7 */
3198 		      insn = 0x07070000 | (insn & 0xffff);
3199 		    }
3200 		  else if ((insn & 0xff000000) == 0x4d000000)
3201 		    {
3202 		      /* LD->LE transition.
3203 			 bas %r14,0(%rx,%r13) -> bc 0,0  */
3204 		      insn = 0x47000000;
3205 		    }
3206 		  else
3207 		    {
3208 		      /* LD->LE transition.
3209 			 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3210 		      insn = 0xc0040000;
3211 		      bfd_put_16 (output_bfd, 0x0000,
3212 				  contents + rel->r_offset + 4);
3213 		    }
3214 		  bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3215 		}
3216 	    }
3217 	  continue;
3218 
3219 	default:
3220 	  break;
3221 	}
3222 
3223       /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3224 	 because such sections are not SEC_ALLOC and thus ld.so will
3225 	 not process them.  */
3226       if (unresolved_reloc
3227 	  && !((input_section->flags & SEC_DEBUGGING) != 0
3228 	       && h->def_dynamic)
3229 	  && _bfd_elf_section_offset (output_bfd, info, input_section,
3230 				      rel->r_offset) != (bfd_vma) -1)
3231 	(*_bfd_error_handler)
3232 	  (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3233 	   input_bfd,
3234 	   input_section,
3235 	   (long) rel->r_offset,
3236 	   howto->name,
3237 	   h->root.root.string);
3238 
3239     do_relocation:
3240 
3241       if (r_type == R_390_20
3242 	  || r_type == R_390_GOT20
3243 	  || r_type == R_390_GOTPLT20
3244 	  || r_type == R_390_TLS_GOTIE20)
3245 	{
3246 	  relocation += rel->r_addend;
3247 	  relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3248 	  r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3249 					contents, rel->r_offset,
3250 					relocation, 0);
3251 	}
3252       else
3253 	r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3254 				      contents, rel->r_offset,
3255 				      relocation, rel->r_addend);
3256 
3257       if (r != bfd_reloc_ok)
3258 	{
3259 	  const char *name;
3260 
3261 	  if (h != NULL)
3262 	    name = h->root.root.string;
3263 	  else
3264 	    {
3265 	      name = bfd_elf_string_from_elf_section (input_bfd,
3266 						      symtab_hdr->sh_link,
3267 						      sym->st_name);
3268 	      if (name == NULL)
3269 		return FALSE;
3270 	      if (*name == '\0')
3271 		name = bfd_section_name (input_bfd, sec);
3272 	    }
3273 
3274 	  if (r == bfd_reloc_overflow)
3275 	    {
3276 
3277 	      if (! ((*info->callbacks->reloc_overflow)
3278 		     (info, (h ? &h->root : NULL), name, howto->name,
3279 		      (bfd_vma) 0, input_bfd, input_section,
3280 		      rel->r_offset)))
3281 		return FALSE;
3282 	    }
3283 	  else
3284 	    {
3285 	      (*_bfd_error_handler)
3286 		(_("%B(%A+0x%lx): reloc against `%s': error %d"),
3287 		 input_bfd, input_section,
3288 		 (long) rel->r_offset, name, (int) r);
3289 	      return FALSE;
3290 	    }
3291 	}
3292     }
3293 
3294   return TRUE;
3295 }
3296 
3297 /* Generate the PLT slots together with the dynamic relocations needed
3298    for IFUNC symbols.  */
3299 
3300 static void
elf_s390_finish_ifunc_symbol(bfd * output_bfd,struct bfd_link_info * info,struct elf_link_hash_entry * h,struct elf_s390_link_hash_table * htab,bfd_vma iplt_offset,bfd_vma resolver_address)3301 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3302 			      struct bfd_link_info *info,
3303 			      struct elf_link_hash_entry *h,
3304 			      struct elf_s390_link_hash_table *htab,
3305 			      bfd_vma iplt_offset,
3306 			      bfd_vma resolver_address)
3307 {
3308   bfd_vma iplt_index;
3309   bfd_vma got_offset;
3310   bfd_vma igotiplt_offset;
3311   Elf_Internal_Rela rela;
3312   bfd_byte *loc;
3313   asection *plt, *gotplt, *relplt;
3314   bfd_vma relative_offset;
3315 
3316   if (htab->elf.iplt == NULL
3317       || htab->elf.igotplt == NULL
3318       || htab->elf.irelplt == NULL)
3319     abort ();
3320 
3321   gotplt = htab->elf.igotplt;
3322   relplt = htab->elf.irelplt;
3323 
3324   /* Index of the PLT slot within iplt section.  */
3325   iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3326   plt = htab->elf.iplt;
3327   /* Offset into the igot.plt section.  */
3328   igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3329   /* Offset into the got section.  */
3330   got_offset = igotiplt_offset + gotplt->output_offset;
3331 
3332   /* S390 uses halfwords for relative branch calc!  */
3333   relative_offset = - (plt->output_offset +
3334 		       (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3335 /* If offset is > 32768, branch to a previous branch
3336    390 can only handle +-64 K jumps.  */
3337   if ( -32768 > (int) relative_offset )
3338     relative_offset
3339       = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3340 
3341   /* Fill in the entry in the procedure linkage table.  */
3342   if (!info->shared)
3343     {
3344       memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3345 	      PLT_ENTRY_SIZE);
3346 
3347       /* Adjust jump to the first plt entry.  */
3348       bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3349 		  plt->contents + iplt_offset + 20);
3350 
3351       /* Push the GOT offset field.  */
3352       bfd_put_32 (output_bfd,
3353 		  (gotplt->output_section->vma
3354 		   + got_offset),
3355 		  plt->contents + iplt_offset + 24);
3356     }
3357   else if (got_offset < 4096)
3358     {
3359       /* The GOT offset is small enough to be used directly as
3360 	 displacement.  */
3361       memcpy (plt->contents + iplt_offset,
3362 	      elf_s390_plt_pic12_entry,
3363 	      PLT_ENTRY_SIZE);
3364 
3365       /* Put in the GOT offset as displacement value.  The 0xc000
3366 	 value comes from the first word of the plt entry.  Look
3367 	 at the elf_s390_plt_pic16_entry content.  */
3368       bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3369 		  plt->contents + iplt_offset + 2);
3370 
3371       /* Adjust the jump to the first plt entry.  */
3372       bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3373 		  plt->contents + iplt_offset + 20);
3374     }
3375   else if (got_offset < 32768)
3376     {
3377       /* The GOT offset is too big for a displacement but small
3378 	 enough to be a signed 16 bit immediate value as it can be
3379 	 used in an lhi instruction.  */
3380       memcpy (plt->contents + iplt_offset,
3381 	      elf_s390_plt_pic16_entry,
3382 	      PLT_ENTRY_SIZE);
3383 
3384       /* Put in the GOT offset for the lhi instruction.  */
3385       bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3386 		  plt->contents + iplt_offset + 2);
3387 
3388       /* Adjust the jump to the first plt entry.  */
3389       bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3390 		  plt->contents + iplt_offset + 20);
3391     }
3392   else
3393     {
3394       memcpy (plt->contents + iplt_offset,
3395 	      elf_s390_plt_pic_entry,
3396 	      PLT_ENTRY_SIZE);
3397 
3398       /* Adjust the jump to the first plt entry.  */
3399       bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3400 		  plt->contents + iplt_offset + 20);
3401 
3402       /* Push the GOT offset field.  */
3403       bfd_put_32 (output_bfd, got_offset,
3404 		  plt->contents + iplt_offset + 24);
3405     }
3406   /* Insert offset into  reloc. table here.  */
3407   bfd_put_32 (output_bfd, relplt->output_offset +
3408 	      iplt_index * RELA_ENTRY_SIZE,
3409 	      plt->contents + iplt_offset + 28);
3410 
3411   /* Fill in the entry in the global offset table.
3412      Points to instruction after GOT offset.  */
3413   bfd_put_32 (output_bfd,
3414 	      (plt->output_section->vma
3415 	       + plt->output_offset
3416 	       + iplt_offset
3417 	       + 12),
3418 	      gotplt->contents + igotiplt_offset);
3419 
3420   /* Fill in the entry in the .rela.plt section.  */
3421   rela.r_offset = gotplt->output_section->vma + got_offset;
3422 
3423   if (!h
3424       || h->dynindx == -1
3425       || ((info->executable
3426 	   || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3427 	  && h->def_regular))
3428     {
3429       /* The symbol can be locally resolved.  */
3430       rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3431       rela.r_addend = resolver_address;
3432     }
3433   else
3434     {
3435       rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3436       rela.r_addend = 0;
3437     }
3438 
3439   loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3440   bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3441 }
3442 
3443 /* Finish up dynamic symbol handling.  We set the contents of various
3444    dynamic sections here.  */
3445 
3446 static bfd_boolean
elf_s390_finish_dynamic_symbol(bfd * output_bfd,struct bfd_link_info * info,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)3447 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3448 				struct bfd_link_info *info,
3449 				struct elf_link_hash_entry *h,
3450 				Elf_Internal_Sym *sym)
3451 {
3452   struct elf_s390_link_hash_table *htab;
3453   struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3454 
3455   htab = elf_s390_hash_table (info);
3456 
3457   if (h->plt.offset != (bfd_vma) -1)
3458     {
3459       bfd_vma plt_index;
3460       bfd_vma got_offset;
3461       Elf_Internal_Rela rela;
3462       bfd_byte *loc;
3463       bfd_vma relative_offset;
3464 
3465       /* This symbol has an entry in the procedure linkage table.  Set
3466 	 it up.  */
3467       if (s390_is_ifunc_symbol_p (h))
3468 	{
3469 	  /* If we can resolve the IFUNC symbol locally we generate an
3470 	     IRELATIVE reloc.  */
3471 	  elf_s390_finish_ifunc_symbol (output_bfd, info, h, htab, h->plt.offset,
3472 					eh->ifunc_resolver_address +
3473 					eh->ifunc_resolver_section->output_offset +
3474 					eh->ifunc_resolver_section->output_section->vma);
3475 	  /* Fallthrough.  Handling of explicit GOT slots of IFUNC
3476 	     symbols is below.  */
3477 	}
3478       else
3479 	{
3480 	  if (h->dynindx == -1
3481 	      || htab->elf.splt == NULL
3482 	      || htab->elf.sgotplt == NULL
3483 	      || htab->elf.srelplt == NULL)
3484 	    abort ();
3485 
3486 	  /* Calc. index no.
3487 	     Current offset - size first entry / entry size.  */
3488 	  plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3489 
3490 	  /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3491 	     addr & GOT addr.  */
3492 	  got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3493 
3494 	  /* S390 uses halfwords for relative branch calc!  */
3495 	  relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3496 				(PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3497 	  /* If offset is > 32768, branch to a previous branch
3498 	     390 can only handle +-64 K jumps.  */
3499 	  if ( -32768 > (int) relative_offset )
3500 	    relative_offset
3501 	      = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3502 
3503 	  /* Fill in the entry in the procedure linkage table.  */
3504 	  if (!info->shared)
3505 	    {
3506 	      memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3507 		      PLT_ENTRY_SIZE);
3508 
3509 	      /* Adjust jump to the first plt entry.  */
3510 	      bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3511 			  htab->elf.splt->contents + h->plt.offset + 20);
3512 
3513 	      /* Push the GOT offset field.  */
3514 	      bfd_put_32 (output_bfd,
3515 			  (htab->elf.sgotplt->output_section->vma
3516 			   + htab->elf.sgotplt->output_offset
3517 			   + got_offset),
3518 			  htab->elf.splt->contents + h->plt.offset + 24);
3519 	    }
3520 	  else if (got_offset < 4096)
3521 	    {
3522 	      /* The GOT offset is small enough to be used directly as
3523 		 displacement.  */
3524 	      memcpy (htab->elf.splt->contents + h->plt.offset,
3525 		      elf_s390_plt_pic12_entry,
3526 		      PLT_ENTRY_SIZE);
3527 
3528 	      /* Put in the GOT offset as displacement value.  The 0xc000
3529 		 value comes from the first word of the plt entry.  Look
3530 		 at the elf_s390_plt_pic16_entry content.  */
3531 	      bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3532 			  htab->elf.splt->contents + h->plt.offset + 2);
3533 
3534 	      /* Adjust the jump to the first plt entry.  */
3535 	      bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3536 			  htab->elf.splt->contents + h->plt.offset + 20);
3537 	    }
3538 	  else if (got_offset < 32768)
3539 	    {
3540 	      /* The GOT offset is too big for a displacement but small
3541 		 enough to be a signed 16 bit immediate value as it can be
3542 		 used in an lhi instruction.  */
3543 	      memcpy (htab->elf.splt->contents + h->plt.offset,
3544 		      elf_s390_plt_pic16_entry,
3545 		      PLT_ENTRY_SIZE);
3546 
3547 	      /* Put in the GOT offset for the lhi instruction.  */
3548 	      bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3549 			  htab->elf.splt->contents + h->plt.offset + 2);
3550 
3551 	      /* Adjust the jump to the first plt entry.  */
3552 	      bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3553 			  htab->elf.splt->contents + h->plt.offset + 20);
3554 	    }
3555 	  else
3556 	    {
3557 	      memcpy (htab->elf.splt->contents + h->plt.offset,
3558 		      elf_s390_plt_pic_entry,
3559 		      PLT_ENTRY_SIZE);
3560 
3561 	      /* Adjust the jump to the first plt entry.  */
3562 	      bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3563 			  htab->elf.splt->contents + h->plt.offset + 20);
3564 
3565 	      /* Push the GOT offset field.  */
3566 	      bfd_put_32 (output_bfd, got_offset,
3567 			  htab->elf.splt->contents + h->plt.offset + 24);
3568 	    }
3569 	  /* Insert offset into  reloc. table here.  */
3570 	  bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3571 		      htab->elf.splt->contents + h->plt.offset + 28);
3572 
3573 	  /* Fill in the entry in the global offset table.
3574 	     Points to instruction after GOT offset.  */
3575 	  bfd_put_32 (output_bfd,
3576 		      (htab->elf.splt->output_section->vma
3577 		       + htab->elf.splt->output_offset
3578 		       + h->plt.offset
3579 		       + 12),
3580 		      htab->elf.sgotplt->contents + got_offset);
3581 
3582 	  /* Fill in the entry in the .rela.plt section.  */
3583 	  rela.r_offset = (htab->elf.sgotplt->output_section->vma
3584 			   + htab->elf.sgotplt->output_offset
3585 			   + got_offset);
3586 	  rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3587 	  rela.r_addend = 0;
3588 	  loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3589 	  bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3590 
3591 	  if (!h->def_regular)
3592 	    {
3593 	      /* Mark the symbol as undefined, rather than as defined in
3594 		 the .plt section.  Leave the value alone.  This is a clue
3595 		 for the dynamic linker, to make function pointer
3596 		 comparisons work between an application and shared
3597 		 library.  */
3598 	      sym->st_shndx = SHN_UNDEF;
3599 	    }
3600 	}
3601     }
3602 
3603   if (h->got.offset != (bfd_vma) -1
3604       && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3605       && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3606       && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3607     {
3608       Elf_Internal_Rela rela;
3609       bfd_byte *loc;
3610 
3611       /* This symbol has an entry in the global offset table.  Set it
3612 	 up.  */
3613 
3614       if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3615 	abort ();
3616 
3617       rela.r_offset = (htab->elf.sgot->output_section->vma
3618 		       + htab->elf.sgot->output_offset
3619 		       + (h->got.offset &~ (bfd_vma) 1));
3620 
3621       /* If this is a static link, or it is a -Bsymbolic link and the
3622 	 symbol is defined locally or was forced to be local because
3623 	 of a version file, we just want to emit a RELATIVE reloc.
3624 	 The entry in the global offset table will already have been
3625 	 initialized in the relocate_section function.  */
3626       if (h->def_regular && s390_is_ifunc_symbol_p (h))
3627 	{
3628 	  if (info->shared)
3629 	    {
3630 	      /* An explicit GOT slot usage needs GLOB_DAT.  If the
3631 		 symbol references local the implicit got.iplt slot
3632 		 will be used and the IRELATIVE reloc has been created
3633 		 above.  */
3634 	      goto do_glob_dat;
3635 	    }
3636 	  else
3637 	    {
3638 	      /* For non-shared objects explicit GOT slots must be
3639 		 filled with the PLT slot address for pointer
3640 		 equality reasons.  */
3641 	      bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3642 				       + htab->elf.iplt->output_offset
3643 				       + h->plt.offset),
3644 			  htab->elf.sgot->contents + h->got.offset);
3645 	      return TRUE;
3646 	    }
3647 	}
3648       else if (info->shared
3649 	  && SYMBOL_REFERENCES_LOCAL (info, h))
3650 	{
3651 	  /* If this is a static link, or it is a -Bsymbolic link and
3652 	     the symbol is defined locally or was forced to be local
3653 	     because of a version file, we just want to emit a
3654 	     RELATIVE reloc.  The entry in the global offset table
3655 	     will already have been initialized in the
3656 	     relocate_section function.  */
3657 	  if (!h->def_regular)
3658 	    return FALSE;
3659 	  BFD_ASSERT((h->got.offset & 1) != 0);
3660 	  rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3661 	  rela.r_addend = (h->root.u.def.value
3662 			   + h->root.u.def.section->output_section->vma
3663 			   + h->root.u.def.section->output_offset);
3664 	}
3665       else
3666 	{
3667 	  BFD_ASSERT((h->got.offset & 1) == 0);
3668 	do_glob_dat:
3669 	  bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3670 	  rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3671 	  rela.r_addend = 0;
3672 	}
3673 
3674       loc = htab->elf.srelgot->contents;
3675       loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3676       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3677     }
3678 
3679   if (h->needs_copy)
3680     {
3681       Elf_Internal_Rela rela;
3682       bfd_byte *loc;
3683 
3684       /* This symbols needs a copy reloc.  Set it up.  */
3685 
3686       if (h->dynindx == -1
3687 	  || (h->root.type != bfd_link_hash_defined
3688 	      && h->root.type != bfd_link_hash_defweak)
3689 	  || htab->srelbss == NULL)
3690 	abort ();
3691 
3692       rela.r_offset = (h->root.u.def.value
3693 		       + h->root.u.def.section->output_section->vma
3694 		       + h->root.u.def.section->output_offset);
3695       rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3696       rela.r_addend = 0;
3697       loc = htab->srelbss->contents;
3698       loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3699       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3700     }
3701 
3702   /* Mark some specially defined symbols as absolute.  */
3703   if (h == htab->elf.hdynamic
3704       || h == htab->elf.hgot
3705       || h == htab->elf.hplt)
3706     sym->st_shndx = SHN_ABS;
3707 
3708   return TRUE;
3709 }
3710 
3711 /* Used to decide how to sort relocs in an optimal manner for the
3712    dynamic linker, before writing them out.  */
3713 
3714 static enum elf_reloc_type_class
elf_s390_reloc_type_class(const Elf_Internal_Rela * rela)3715 elf_s390_reloc_type_class (const Elf_Internal_Rela *rela)
3716 {
3717   switch ((int) ELF32_R_TYPE (rela->r_info))
3718     {
3719     case R_390_RELATIVE:
3720       return reloc_class_relative;
3721     case R_390_JMP_SLOT:
3722       return reloc_class_plt;
3723     case R_390_COPY:
3724       return reloc_class_copy;
3725     default:
3726       return reloc_class_normal;
3727     }
3728 }
3729 
3730 /* Finish up the dynamic sections.  */
3731 
3732 static bfd_boolean
elf_s390_finish_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)3733 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3734 				  struct bfd_link_info *info)
3735 {
3736   struct elf_s390_link_hash_table *htab;
3737   bfd *dynobj;
3738   asection *sdyn;
3739   bfd *ibfd;
3740   unsigned int i;
3741 
3742   htab = elf_s390_hash_table (info);
3743   dynobj = htab->elf.dynobj;
3744   sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3745 
3746   if (htab->elf.dynamic_sections_created)
3747     {
3748       Elf32_External_Dyn *dyncon, *dynconend;
3749 
3750       if (sdyn == NULL || htab->elf.sgot == NULL)
3751 	abort ();
3752 
3753       dyncon = (Elf32_External_Dyn *) sdyn->contents;
3754       dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3755       for (; dyncon < dynconend; dyncon++)
3756 	{
3757 	  Elf_Internal_Dyn dyn;
3758 	  asection *s;
3759 
3760 	  bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3761 
3762 	  switch (dyn.d_tag)
3763 	    {
3764 	    default:
3765 	      continue;
3766 
3767 	    case DT_PLTGOT:
3768 	      dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
3769 	      break;
3770 
3771 	    case DT_JMPREL:
3772 	      dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
3773 	      break;
3774 
3775 	    case DT_PLTRELSZ:
3776 	      s = htab->elf.srelplt->output_section;
3777 	      dyn.d_un.d_val = s->size;
3778 	      break;
3779 	    }
3780 
3781 	  bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3782 	}
3783 
3784       /* Fill in the special first entry in the procedure linkage table.  */
3785       if (htab->elf.splt && htab->elf.splt->size > 0)
3786 	{
3787 	  memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3788 	  if (info->shared)
3789 	    {
3790 	      memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3791 		      PLT_FIRST_ENTRY_SIZE);
3792 	    }
3793 	  else
3794 	    {
3795 	      memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3796 		      PLT_FIRST_ENTRY_SIZE);
3797 	      bfd_put_32 (output_bfd,
3798 			  htab->elf.sgotplt->output_section->vma
3799 			  + htab->elf.sgotplt->output_offset,
3800 			  htab->elf.splt->contents + 24);
3801 	   }
3802 	  elf_section_data (htab->elf.splt->output_section)
3803 	    ->this_hdr.sh_entsize = 4;
3804 	}
3805 
3806     }
3807 
3808   if (htab->elf.sgotplt)
3809     {
3810       /* Fill in the first three entries in the global offset table.  */
3811       if (htab->elf.sgotplt->size > 0)
3812 	{
3813 	  bfd_put_32 (output_bfd,
3814 		      (sdyn == NULL ? (bfd_vma) 0
3815 		       : sdyn->output_section->vma + sdyn->output_offset),
3816 		      htab->elf.sgotplt->contents);
3817 	  /* One entry for shared object struct ptr.  */
3818 	  bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3819 	  /* One entry for _dl_runtime_resolve.  */
3820 	  bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3821 	}
3822 
3823       elf_section_data (htab->elf.sgotplt->output_section)
3824 	->this_hdr.sh_entsize = 4;
3825     }
3826   /* Finish dynamic symbol for local IFUNC symbols.  */
3827   for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3828     {
3829       struct plt_entry *local_plt;
3830       Elf_Internal_Sym *isym;
3831       Elf_Internal_Shdr *symtab_hdr;
3832 
3833       symtab_hdr = &elf_symtab_hdr (ibfd);
3834 
3835       local_plt = elf_s390_local_plt (ibfd);
3836       if (local_plt != NULL)
3837 	for (i = 0; i < symtab_hdr->sh_info; i++)
3838 	  {
3839 	    if (local_plt[i].plt.offset != (bfd_vma) -1)
3840 	      {
3841 		asection *sec = local_plt[i].sec;
3842 		isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3843 		if (isym == NULL)
3844 		  return FALSE;
3845 
3846 		if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3847 		  elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3848 						local_plt[i].plt.offset,
3849 						isym->st_value
3850 						+ sec->output_section->vma
3851 						+ sec->output_offset);
3852 
3853 	      }
3854 	  }
3855     }
3856   return TRUE;
3857 }
3858 
3859 static bfd_boolean
elf_s390_grok_prstatus(bfd * abfd,Elf_Internal_Note * note)3860 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
3861 {
3862   int offset;
3863   unsigned int size;
3864 
3865   switch (note->descsz)
3866     {
3867       default:
3868 	return FALSE;
3869 
3870       case 224:		/* S/390 Linux.  */
3871 	/* pr_cursig */
3872 	elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3873 
3874 	/* pr_pid */
3875 	elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3876 
3877 	/* pr_reg */
3878 	offset = 72;
3879 	size = 144;
3880 	break;
3881     }
3882 
3883   /* Make a ".reg/999" section.  */
3884   return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3885 					  size, note->descpos + offset);
3886 }
3887 
3888 /* Return address for Ith PLT stub in section PLT, for relocation REL
3889    or (bfd_vma) -1 if it should not be included.  */
3890 
3891 static bfd_vma
elf_s390_plt_sym_val(bfd_vma i,const asection * plt,const arelent * rel ATTRIBUTE_UNUSED)3892 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3893 		      const arelent *rel ATTRIBUTE_UNUSED)
3894 {
3895   return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3896 }
3897 
3898 static bfd_boolean
elf32_s390_merge_private_bfd_data(bfd * ibfd,bfd * obfd)3899 elf32_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3900 {
3901   elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
3902   return TRUE;
3903 }
3904 
3905 
3906 #define TARGET_BIG_SYM	bfd_elf32_s390_vec
3907 #define TARGET_BIG_NAME	"elf32-s390"
3908 #define ELF_ARCH	bfd_arch_s390
3909 #define ELF_TARGET_ID	S390_ELF_DATA
3910 #define ELF_MACHINE_CODE EM_S390
3911 #define ELF_MACHINE_ALT1 EM_S390_OLD
3912 #define ELF_MAXPAGESIZE 0x1000
3913 
3914 #define elf_backend_can_gc_sections	1
3915 #define elf_backend_can_refcount	1
3916 #define elf_backend_want_got_plt	1
3917 #define elf_backend_plt_readonly	1
3918 #define elf_backend_want_plt_sym	0
3919 #define elf_backend_got_header_size	12
3920 #define elf_backend_rela_normal		1
3921 
3922 #define elf_info_to_howto		      elf_s390_info_to_howto
3923 
3924 #define bfd_elf32_bfd_is_local_label_name     elf_s390_is_local_label_name
3925 #define bfd_elf32_bfd_link_hash_table_create  elf_s390_link_hash_table_create
3926 #define bfd_elf32_bfd_reloc_type_lookup	      elf_s390_reloc_type_lookup
3927 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3928 
3929 #define bfd_elf32_bfd_merge_private_bfd_data  elf32_s390_merge_private_bfd_data
3930 
3931 #define elf_backend_adjust_dynamic_symbol     elf_s390_adjust_dynamic_symbol
3932 #define elf_backend_check_relocs	      elf_s390_check_relocs
3933 #define elf_backend_copy_indirect_symbol      elf_s390_copy_indirect_symbol
3934 #define elf_backend_create_dynamic_sections   elf_s390_create_dynamic_sections
3935 #define elf_backend_finish_dynamic_sections   elf_s390_finish_dynamic_sections
3936 #define elf_backend_finish_dynamic_symbol     elf_s390_finish_dynamic_symbol
3937 #define elf_backend_gc_mark_hook	      elf_s390_gc_mark_hook
3938 #define elf_backend_gc_sweep_hook	      elf_s390_gc_sweep_hook
3939 #define elf_backend_reloc_type_class	      elf_s390_reloc_type_class
3940 #define elf_backend_relocate_section	      elf_s390_relocate_section
3941 #define elf_backend_size_dynamic_sections     elf_s390_size_dynamic_sections
3942 #define elf_backend_init_index_section	      _bfd_elf_init_1_index_section
3943 #define elf_backend_reloc_type_class	      elf_s390_reloc_type_class
3944 #define elf_backend_grok_prstatus	      elf_s390_grok_prstatus
3945 #define elf_backend_plt_sym_val		      elf_s390_plt_sym_val
3946 #define elf_backend_add_symbol_hook           elf_s390_add_symbol_hook
3947 
3948 #define bfd_elf32_mkobject		elf_s390_mkobject
3949 #define elf_backend_object_p		elf_s390_object_p
3950 
3951 #include "elf32-target.h"
3952