Commit | Line | Data |
---|---|---|
a85d7ed0 | 1 | /* IBM S/390-specific support for 64-bit ELF |
3eb128b2 AM |
2 | Copyright 2000, 2001, 2002, 2003, 2004, 2005 |
3 | Free Software Foundation, Inc. | |
a85d7ed0 NC |
4 | Contributed Martin Schwidefsky (schwidefsky@de.ibm.com). |
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 2 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 | |
3e110533 | 20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA |
53e09e0a | 21 | 02110-1301, USA. */ |
a85d7ed0 NC |
22 | |
23 | #include "bfd.h" | |
24 | #include "sysdep.h" | |
25 | #include "bfdlink.h" | |
26 | #include "libbfd.h" | |
27 | #include "elf-bfd.h" | |
28 | ||
29 | static reloc_howto_type *elf_s390_reloc_type_lookup | |
30 | PARAMS ((bfd *, bfd_reloc_code_real_type)); | |
31 | static void elf_s390_info_to_howto | |
32 | PARAMS ((bfd *, arelent *, Elf_Internal_Rela *)); | |
b34976b6 | 33 | static bfd_boolean elf_s390_is_local_label_name |
0451c93c MS |
34 | PARAMS ((bfd *, const char *)); |
35 | static struct bfd_hash_entry *link_hash_newfunc | |
a85d7ed0 NC |
36 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); |
37 | static struct bfd_link_hash_table *elf_s390_link_hash_table_create | |
38 | PARAMS ((bfd *)); | |
b34976b6 | 39 | static bfd_boolean create_got_section |
0451c93c | 40 | PARAMS((bfd *, struct bfd_link_info *)); |
b34976b6 | 41 | static bfd_boolean elf_s390_create_dynamic_sections |
0451c93c MS |
42 | PARAMS((bfd *, struct bfd_link_info *)); |
43 | static void elf_s390_copy_indirect_symbol | |
9c5bfbb7 | 44 | PARAMS ((const struct elf_backend_data *, struct elf_link_hash_entry *, |
b48fa14c | 45 | struct elf_link_hash_entry *)); |
b34976b6 | 46 | static bfd_boolean elf_s390_check_relocs |
a85d7ed0 NC |
47 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
48 | const Elf_Internal_Rela *)); | |
99c79b2e | 49 | static asection *elf_s390_gc_mark_hook |
1e2f5b6e | 50 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
99c79b2e | 51 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
b34976b6 | 52 | static bfd_boolean elf_s390_gc_sweep_hook |
99c79b2e AJ |
53 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
54 | const Elf_Internal_Rela *)); | |
5236c819 MS |
55 | struct elf_s390_link_hash_entry; |
56 | static void elf_s390_adjust_gotplt | |
57 | PARAMS ((struct elf_s390_link_hash_entry *)); | |
b34976b6 | 58 | static bfd_boolean elf_s390_adjust_dynamic_symbol |
a85d7ed0 | 59 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
b34976b6 | 60 | static bfd_boolean allocate_dynrelocs |
0451c93c | 61 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 62 | static bfd_boolean readonly_dynrelocs |
0451c93c | 63 | PARAMS ((struct elf_link_hash_entry *, PTR)); |
b34976b6 | 64 | static bfd_boolean elf_s390_size_dynamic_sections |
a85d7ed0 | 65 | PARAMS ((bfd *, struct bfd_link_info *)); |
b34976b6 | 66 | static bfd_boolean elf_s390_relocate_section |
a85d7ed0 NC |
67 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
68 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
b34976b6 | 69 | static bfd_boolean elf_s390_finish_dynamic_symbol |
a85d7ed0 NC |
70 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
71 | Elf_Internal_Sym *)); | |
0451c93c MS |
72 | static enum elf_reloc_type_class elf_s390_reloc_type_class |
73 | PARAMS ((const Elf_Internal_Rela *)); | |
b34976b6 | 74 | static bfd_boolean elf_s390_finish_dynamic_sections |
a85d7ed0 | 75 | PARAMS ((bfd *, struct bfd_link_info *)); |
69fc87f1 MS |
76 | static bfd_boolean elf_s390_mkobject |
77 | PARAMS ((bfd *)); | |
5236c819 MS |
78 | static bfd_boolean elf_s390_object_p |
79 | PARAMS ((bfd *)); | |
69fc87f1 MS |
80 | static int elf_s390_tls_transition |
81 | PARAMS ((struct bfd_link_info *, int, int)); | |
82 | static bfd_reloc_status_type s390_tls_reloc | |
83 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
84 | static bfd_vma dtpoff_base | |
85 | PARAMS ((struct bfd_link_info *)); | |
86 | static bfd_vma tpoff | |
87 | PARAMS ((struct bfd_link_info *, bfd_vma)); | |
88 | static void invalid_tls_insn | |
89 | PARAMS ((bfd *, asection *, Elf_Internal_Rela *)); | |
bd1ea41b MS |
90 | static bfd_reloc_status_type s390_elf_ldisp_reloc |
91 | PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **)); | |
a85d7ed0 | 92 | |
a85d7ed0 NC |
93 | #include "elf/s390.h" |
94 | ||
95 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value | |
96 | from smaller values. Start with zero, widen, *then* decrement. */ | |
97 | #define MINUS_ONE (((bfd_vma)0) - 1) | |
98 | ||
99 | /* The relocation "howto" table. */ | |
100 | static reloc_howto_type elf_howto_table[] = | |
101 | { | |
102 | HOWTO (R_390_NONE, /* type */ | |
103 | 0, /* rightshift */ | |
104 | 0, /* size (0 = byte, 1 = short, 2 = long) */ | |
105 | 0, /* bitsize */ | |
b34976b6 | 106 | FALSE, /* pc_relative */ |
a85d7ed0 NC |
107 | 0, /* bitpos */ |
108 | complain_overflow_dont, /* complain_on_overflow */ | |
109 | bfd_elf_generic_reloc, /* special_function */ | |
110 | "R_390_NONE", /* name */ | |
b34976b6 | 111 | FALSE, /* partial_inplace */ |
a85d7ed0 NC |
112 | 0, /* src_mask */ |
113 | 0, /* dst_mask */ | |
b34976b6 AM |
114 | FALSE), /* pcrel_offset */ |
115 | ||
5236c819 MS |
116 | HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
117 | bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE), | |
118 | HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
119 | bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE), | |
120 | HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
121 | bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE), | |
122 | HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
123 | bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE), | |
124 | HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
125 | bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE), | |
15f8604d | 126 | HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield, |
5236c819 MS |
127 | bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE), |
128 | HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
129 | bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE), | |
130 | HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
131 | bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE), | |
132 | HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
133 | bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE), | |
134 | HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
135 | bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE), | |
136 | HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
137 | bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE), | |
138 | HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
139 | bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE), | |
140 | HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
141 | bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE), | |
142 | HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
143 | bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE), | |
144 | HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
145 | bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE), | |
146 | HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
147 | bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE), | |
148 | HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
149 | bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE), | |
150 | HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield, | |
151 | bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE), | |
152 | HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
153 | bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE), | |
154 | HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
155 | bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE), | |
156 | HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
157 | bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE), | |
158 | HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
159 | bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE), | |
160 | HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
161 | bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE), | |
162 | HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
163 | bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE), | |
164 | HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, | |
165 | bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE), | |
166 | HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
167 | bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE), | |
168 | HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
169 | bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE), | |
170 | HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
171 | bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE), | |
172 | HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
173 | bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE), | |
174 | HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
175 | bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE), | |
176 | HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
177 | bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE), | |
178 | HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
179 | bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE), | |
180 | HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
181 | bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE), | |
182 | HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
183 | bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE), | |
184 | HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
185 | bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE), | |
186 | HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
187 | bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE), | |
69fc87f1 MS |
188 | HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
189 | s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE), | |
190 | HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
191 | s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE), | |
192 | HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
193 | s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE), | |
194 | EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */ | |
195 | HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
196 | bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE), | |
197 | HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont, | |
198 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE), | |
199 | EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */ | |
200 | HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
201 | bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE), | |
202 | EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */ | |
203 | HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
204 | bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE), | |
205 | EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */ | |
206 | HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
207 | bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE), | |
208 | HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
209 | bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE), | |
210 | EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */ | |
211 | HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
212 | bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE), | |
213 | EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */ | |
214 | HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
215 | bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE), | |
216 | HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
217 | bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE), | |
218 | HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
219 | bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE), | |
220 | HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
221 | bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE), | |
bd1ea41b MS |
222 | HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont, |
223 | s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE), | |
224 | HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, | |
225 | s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE), | |
226 | HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont, | |
227 | s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE), | |
228 | HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont, | |
229 | s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE), | |
a85d7ed0 NC |
230 | }; |
231 | ||
232 | /* GNU extension to record C++ vtable hierarchy. */ | |
233 | static reloc_howto_type elf64_s390_vtinherit_howto = | |
b34976b6 | 234 | HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE); |
a85d7ed0 | 235 | static reloc_howto_type elf64_s390_vtentry_howto = |
b34976b6 | 236 | HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE); |
a85d7ed0 NC |
237 | |
238 | static reloc_howto_type * | |
239 | elf_s390_reloc_type_lookup (abfd, code) | |
240 | bfd *abfd ATTRIBUTE_UNUSED; | |
241 | bfd_reloc_code_real_type code; | |
242 | { | |
0451c93c MS |
243 | switch (code) |
244 | { | |
245 | case BFD_RELOC_NONE: | |
246 | return &elf_howto_table[(int) R_390_NONE]; | |
247 | case BFD_RELOC_8: | |
248 | return &elf_howto_table[(int) R_390_8]; | |
249 | case BFD_RELOC_390_12: | |
250 | return &elf_howto_table[(int) R_390_12]; | |
251 | case BFD_RELOC_16: | |
252 | return &elf_howto_table[(int) R_390_16]; | |
253 | case BFD_RELOC_32: | |
254 | return &elf_howto_table[(int) R_390_32]; | |
255 | case BFD_RELOC_CTOR: | |
256 | return &elf_howto_table[(int) R_390_32]; | |
257 | case BFD_RELOC_32_PCREL: | |
258 | return &elf_howto_table[(int) R_390_PC32]; | |
259 | case BFD_RELOC_390_GOT12: | |
260 | return &elf_howto_table[(int) R_390_GOT12]; | |
261 | case BFD_RELOC_32_GOT_PCREL: | |
262 | return &elf_howto_table[(int) R_390_GOT32]; | |
263 | case BFD_RELOC_390_PLT32: | |
264 | return &elf_howto_table[(int) R_390_PLT32]; | |
265 | case BFD_RELOC_390_COPY: | |
266 | return &elf_howto_table[(int) R_390_COPY]; | |
267 | case BFD_RELOC_390_GLOB_DAT: | |
268 | return &elf_howto_table[(int) R_390_GLOB_DAT]; | |
269 | case BFD_RELOC_390_JMP_SLOT: | |
270 | return &elf_howto_table[(int) R_390_JMP_SLOT]; | |
271 | case BFD_RELOC_390_RELATIVE: | |
272 | return &elf_howto_table[(int) R_390_RELATIVE]; | |
273 | case BFD_RELOC_32_GOTOFF: | |
5236c819 | 274 | return &elf_howto_table[(int) R_390_GOTOFF32]; |
0451c93c MS |
275 | case BFD_RELOC_390_GOTPC: |
276 | return &elf_howto_table[(int) R_390_GOTPC]; | |
277 | case BFD_RELOC_390_GOT16: | |
278 | return &elf_howto_table[(int) R_390_GOT16]; | |
279 | case BFD_RELOC_16_PCREL: | |
280 | return &elf_howto_table[(int) R_390_PC16]; | |
281 | case BFD_RELOC_390_PC16DBL: | |
282 | return &elf_howto_table[(int) R_390_PC16DBL]; | |
283 | case BFD_RELOC_390_PLT16DBL: | |
284 | return &elf_howto_table[(int) R_390_PLT16DBL]; | |
0451c93c MS |
285 | case BFD_RELOC_390_PC32DBL: |
286 | return &elf_howto_table[(int) R_390_PC32DBL]; | |
287 | case BFD_RELOC_390_PLT32DBL: | |
288 | return &elf_howto_table[(int) R_390_PLT32DBL]; | |
289 | case BFD_RELOC_390_GOTPCDBL: | |
290 | return &elf_howto_table[(int) R_390_GOTPCDBL]; | |
291 | case BFD_RELOC_64: | |
292 | return &elf_howto_table[(int) R_390_64]; | |
293 | case BFD_RELOC_64_PCREL: | |
294 | return &elf_howto_table[(int) R_390_PC64]; | |
295 | case BFD_RELOC_390_GOT64: | |
296 | return &elf_howto_table[(int) R_390_GOT64]; | |
297 | case BFD_RELOC_390_PLT64: | |
298 | return &elf_howto_table[(int) R_390_PLT64]; | |
299 | case BFD_RELOC_390_GOTENT: | |
300 | return &elf_howto_table[(int) R_390_GOTENT]; | |
5236c819 MS |
301 | case BFD_RELOC_16_GOTOFF: |
302 | return &elf_howto_table[(int) R_390_GOTOFF16]; | |
303 | case BFD_RELOC_390_GOTOFF64: | |
304 | return &elf_howto_table[(int) R_390_GOTOFF64]; | |
305 | case BFD_RELOC_390_GOTPLT12: | |
306 | return &elf_howto_table[(int) R_390_GOTPLT12]; | |
307 | case BFD_RELOC_390_GOTPLT16: | |
308 | return &elf_howto_table[(int) R_390_GOTPLT16]; | |
309 | case BFD_RELOC_390_GOTPLT32: | |
310 | return &elf_howto_table[(int) R_390_GOTPLT32]; | |
311 | case BFD_RELOC_390_GOTPLT64: | |
312 | return &elf_howto_table[(int) R_390_GOTPLT64]; | |
313 | case BFD_RELOC_390_GOTPLTENT: | |
314 | return &elf_howto_table[(int) R_390_GOTPLTENT]; | |
315 | case BFD_RELOC_390_PLTOFF16: | |
316 | return &elf_howto_table[(int) R_390_PLTOFF16]; | |
317 | case BFD_RELOC_390_PLTOFF32: | |
318 | return &elf_howto_table[(int) R_390_PLTOFF32]; | |
319 | case BFD_RELOC_390_PLTOFF64: | |
320 | return &elf_howto_table[(int) R_390_PLTOFF64]; | |
69fc87f1 MS |
321 | case BFD_RELOC_390_TLS_LOAD: |
322 | return &elf_howto_table[(int) R_390_TLS_LOAD]; | |
323 | case BFD_RELOC_390_TLS_GDCALL: | |
324 | return &elf_howto_table[(int) R_390_TLS_GDCALL]; | |
325 | case BFD_RELOC_390_TLS_LDCALL: | |
326 | return &elf_howto_table[(int) R_390_TLS_LDCALL]; | |
327 | case BFD_RELOC_390_TLS_GD64: | |
328 | return &elf_howto_table[(int) R_390_TLS_GD64]; | |
329 | case BFD_RELOC_390_TLS_GOTIE12: | |
330 | return &elf_howto_table[(int) R_390_TLS_GOTIE12]; | |
331 | case BFD_RELOC_390_TLS_GOTIE64: | |
332 | return &elf_howto_table[(int) R_390_TLS_GOTIE64]; | |
333 | case BFD_RELOC_390_TLS_LDM64: | |
334 | return &elf_howto_table[(int) R_390_TLS_LDM64]; | |
335 | case BFD_RELOC_390_TLS_IE64: | |
336 | return &elf_howto_table[(int) R_390_TLS_IE64]; | |
337 | case BFD_RELOC_390_TLS_IEENT: | |
338 | return &elf_howto_table[(int) R_390_TLS_IEENT]; | |
339 | case BFD_RELOC_390_TLS_LE64: | |
340 | return &elf_howto_table[(int) R_390_TLS_LE64]; | |
341 | case BFD_RELOC_390_TLS_LDO64: | |
342 | return &elf_howto_table[(int) R_390_TLS_LDO64]; | |
343 | case BFD_RELOC_390_TLS_DTPMOD: | |
344 | return &elf_howto_table[(int) R_390_TLS_DTPMOD]; | |
345 | case BFD_RELOC_390_TLS_DTPOFF: | |
346 | return &elf_howto_table[(int) R_390_TLS_DTPOFF]; | |
347 | case BFD_RELOC_390_TLS_TPOFF: | |
348 | return &elf_howto_table[(int) R_390_TLS_TPOFF]; | |
bd1ea41b MS |
349 | case BFD_RELOC_390_20: |
350 | return &elf_howto_table[(int) R_390_20]; | |
351 | case BFD_RELOC_390_GOT20: | |
352 | return &elf_howto_table[(int) R_390_GOT20]; | |
353 | case BFD_RELOC_390_GOTPLT20: | |
354 | return &elf_howto_table[(int) R_390_GOTPLT20]; | |
355 | case BFD_RELOC_390_TLS_GOTIE20: | |
356 | return &elf_howto_table[(int) R_390_TLS_GOTIE20]; | |
5236c819 MS |
357 | case BFD_RELOC_VTABLE_INHERIT: |
358 | return &elf64_s390_vtinherit_howto; | |
359 | case BFD_RELOC_VTABLE_ENTRY: | |
360 | return &elf64_s390_vtentry_howto; | |
0451c93c MS |
361 | default: |
362 | break; | |
363 | } | |
a85d7ed0 NC |
364 | return 0; |
365 | } | |
366 | ||
367 | /* We need to use ELF64_R_TYPE so we have our own copy of this function, | |
368 | and elf64-s390.c has its own copy. */ | |
369 | ||
370 | static void | |
371 | elf_s390_info_to_howto (abfd, cache_ptr, dst) | |
372 | bfd *abfd ATTRIBUTE_UNUSED; | |
373 | arelent *cache_ptr; | |
374 | Elf_Internal_Rela *dst; | |
375 | { | |
376 | switch (ELF64_R_TYPE(dst->r_info)) | |
377 | { | |
378 | case R_390_GNU_VTINHERIT: | |
379 | cache_ptr->howto = &elf64_s390_vtinherit_howto; | |
380 | break; | |
381 | ||
382 | case R_390_GNU_VTENTRY: | |
383 | cache_ptr->howto = &elf64_s390_vtentry_howto; | |
384 | break; | |
385 | ||
386 | default: | |
387 | BFD_ASSERT (ELF64_R_TYPE(dst->r_info) < (unsigned int) R_390_max); | |
388 | cache_ptr->howto = &elf_howto_table[ELF64_R_TYPE(dst->r_info)]; | |
99c79b2e | 389 | } |
a85d7ed0 NC |
390 | } |
391 | ||
69fc87f1 MS |
392 | /* A relocation function which doesn't do anything. */ |
393 | static bfd_reloc_status_type | |
394 | s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section, | |
26e41594 | 395 | output_bfd, error_message) |
69fc87f1 MS |
396 | bfd *abfd ATTRIBUTE_UNUSED; |
397 | arelent *reloc_entry; | |
398 | asymbol *symbol ATTRIBUTE_UNUSED; | |
399 | PTR data ATTRIBUTE_UNUSED; | |
400 | asection *input_section; | |
401 | bfd *output_bfd; | |
402 | char **error_message ATTRIBUTE_UNUSED; | |
403 | { | |
404 | if (output_bfd) | |
405 | reloc_entry->address += input_section->output_offset; | |
406 | return bfd_reloc_ok; | |
407 | } | |
408 | ||
bd1ea41b MS |
409 | /* Handle the large displacement relocs. */ |
410 | static bfd_reloc_status_type | |
411 | s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section, | |
412 | output_bfd, error_message) | |
413 | bfd *abfd; | |
414 | arelent *reloc_entry; | |
415 | asymbol *symbol; | |
416 | PTR data; | |
417 | asection *input_section; | |
418 | bfd *output_bfd; | |
419 | char **error_message ATTRIBUTE_UNUSED; | |
420 | { | |
421 | reloc_howto_type *howto = reloc_entry->howto; | |
422 | bfd_vma relocation; | |
423 | bfd_vma insn; | |
424 | ||
425 | if (output_bfd != (bfd *) NULL | |
426 | && (symbol->flags & BSF_SECTION_SYM) == 0 | |
427 | && (! howto->partial_inplace | |
428 | || reloc_entry->addend == 0)) | |
429 | { | |
430 | reloc_entry->address += input_section->output_offset; | |
431 | return bfd_reloc_ok; | |
432 | } | |
433 | if (output_bfd != NULL) | |
434 | return bfd_reloc_continue; | |
435 | ||
07515404 | 436 | if (reloc_entry->address > bfd_get_section_limit (abfd, input_section)) |
bd1ea41b MS |
437 | return bfd_reloc_outofrange; |
438 | ||
439 | relocation = (symbol->value | |
440 | + symbol->section->output_section->vma | |
441 | + symbol->section->output_offset); | |
442 | relocation += reloc_entry->addend; | |
443 | if (howto->pc_relative) | |
444 | { | |
445 | relocation -= (input_section->output_section->vma | |
446 | + input_section->output_offset); | |
447 | relocation -= reloc_entry->address; | |
448 | } | |
449 | ||
450 | insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address); | |
451 | insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4; | |
452 | bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address); | |
453 | ||
454 | if ((bfd_signed_vma) relocation < - 0x80000 | |
455 | || (bfd_signed_vma) relocation > 0x7ffff) | |
456 | return bfd_reloc_overflow; | |
457 | else | |
458 | return bfd_reloc_ok; | |
459 | } | |
460 | ||
b34976b6 | 461 | static bfd_boolean |
a85d7ed0 NC |
462 | elf_s390_is_local_label_name (abfd, name) |
463 | bfd *abfd; | |
464 | const char *name; | |
465 | { | |
466 | if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L')) | |
b34976b6 | 467 | return TRUE; |
a85d7ed0 NC |
468 | |
469 | return _bfd_elf_is_local_label_name (abfd, name); | |
470 | } | |
471 | ||
472 | /* Functions for the 390 ELF linker. */ | |
473 | ||
474 | /* The name of the dynamic interpreter. This is put in the .interp | |
475 | section. */ | |
476 | ||
477 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
478 | ||
64285810 MS |
479 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
480 | copying dynamic variables from a shared lib into an app's dynbss | |
481 | section, and instead use a dynamic relocation to point into the | |
482 | shared lib. */ | |
483 | #define ELIMINATE_COPY_RELOCS 1 | |
484 | ||
a85d7ed0 NC |
485 | /* The size in bytes of the first entry in the procedure linkage table. */ |
486 | #define PLT_FIRST_ENTRY_SIZE 32 | |
487 | /* The size in bytes of an entry in the procedure linkage table. */ | |
99c79b2e | 488 | #define PLT_ENTRY_SIZE 32 |
a85d7ed0 NC |
489 | |
490 | #define GOT_ENTRY_SIZE 8 | |
491 | ||
492 | /* The first three entries in a procedure linkage table are reserved, | |
493 | and the initial contents are unimportant (we zero them out). | |
494 | Subsequent entries look like this. See the SVR4 ABI 386 | |
495 | supplement to see how this works. */ | |
496 | ||
497 | /* For the s390, simple addr offset can only be 0 - 4096. | |
498 | To use the full 16777216 TB address space, several instructions | |
499 | are needed to load an address in a register and execute | |
500 | a branch( or just saving the address) | |
501 | ||
99c79b2e | 502 | Furthermore, only r 0 and 1 are free to use!!! */ |
a85d7ed0 NC |
503 | |
504 | /* The first 3 words in the GOT are then reserved. | |
505 | Word 0 is the address of the dynamic table. | |
506 | Word 1 is a pointer to a structure describing the object | |
507 | Word 2 is used to point to the loader entry address. | |
508 | ||
509 | The code for PLT entries looks like this: | |
510 | ||
511 | The GOT holds the address in the PLT to be executed. | |
512 | The loader then gets: | |
513 | 24(15) = Pointer to the structure describing the object. | |
99c79b2e | 514 | 28(15) = Offset in symbol table |
a85d7ed0 NC |
515 | The loader must then find the module where the function is |
516 | and insert the address in the GOT. | |
517 | ||
518 | PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1 | |
519 | LG 1,0(1) # 6 bytes Load address from GOT in r1 | |
520 | BCR 15,1 # 2 bytes Jump to address | |
521 | RET1: BASR 1,0 # 2 bytes Return from GOT 1st time | |
522 | LGF 1,12(1) # 6 bytes Load offset in symbl table in r1 | |
523 | BRCL 15,-x # 6 bytes Jump to start of PLT | |
524 | .long ? # 4 bytes offset into symbol table | |
525 | ||
526 | Total = 32 bytes per PLT entry | |
527 | Fixup at offset 2: relative address to GOT entry | |
528 | Fixup at offset 22: relative branch to PLT0 | |
529 | Fixup at offset 28: 32 bit offset into symbol table | |
530 | ||
531 | A 32 bit offset into the symbol table is enough. It allows for symbol | |
532 | tables up to a size of 2 gigabyte. A single dynamic object (the main | |
533 | program, any shared library) is limited to 4GB in size and I want to see | |
534 | the program that manages to have a symbol table of more than 2 GB with a | |
535 | total size of at max 4 GB. */ | |
536 | ||
dc810e39 AM |
537 | #define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000 |
538 | #define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310 | |
539 | #define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004 | |
540 | #define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10 | |
541 | #define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c | |
542 | #define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4 | |
543 | #define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000 | |
544 | #define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000 | |
a85d7ed0 NC |
545 | |
546 | /* The first PLT entry pushes the offset into the symbol table | |
547 | from R1 onto the stack at 8(15) and the loader object info | |
548 | at 12(15), loads the loader address in R1 and jumps to it. */ | |
549 | ||
550 | /* The first entry in the PLT: | |
551 | ||
552 | PLT0: | |
553 | STG 1,56(15) # r1 contains the offset into the symbol table | |
554 | LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table | |
555 | MVC 48(8,15),8(1) # move loader ino (object struct address) to stack | |
556 | LG 1,16(1) # get entry address of loader | |
557 | BCR 15,1 # jump to loader | |
558 | ||
559 | Fixup at offset 8: relative address to start of GOT. */ | |
560 | ||
dc810e39 AM |
561 | #define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038 |
562 | #define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010 | |
563 | #define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000 | |
564 | #define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030 | |
565 | #define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310 | |
566 | #define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004 | |
567 | #define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700 | |
568 | #define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700 | |
a85d7ed0 NC |
569 | |
570 | /* The s390 linker needs to keep track of the number of relocs that it | |
0451c93c MS |
571 | decides to copy as dynamic relocs in check_relocs for each symbol. |
572 | This is so that it can later discard them if they are found to be | |
573 | unnecessary. We store the information in a field extending the | |
574 | regular ELF linker hash table. */ | |
a85d7ed0 | 575 | |
0451c93c | 576 | struct elf_s390_dyn_relocs |
a85d7ed0 | 577 | { |
0451c93c MS |
578 | struct elf_s390_dyn_relocs *next; |
579 | ||
580 | /* The input section of the reloc. */ | |
581 | asection *sec; | |
582 | ||
583 | /* Total number of relocs copied for the input section. */ | |
a85d7ed0 | 584 | bfd_size_type count; |
0451c93c MS |
585 | |
586 | /* Number of pc-relative relocs copied for the input section. */ | |
587 | bfd_size_type pc_count; | |
a85d7ed0 NC |
588 | }; |
589 | ||
590 | /* s390 ELF linker hash entry. */ | |
591 | ||
592 | struct elf_s390_link_hash_entry | |
593 | { | |
0451c93c | 594 | struct elf_link_hash_entry elf; |
a85d7ed0 | 595 | |
0451c93c MS |
596 | /* Track dynamic relocs copied for this symbol. */ |
597 | struct elf_s390_dyn_relocs *dyn_relocs; | |
5236c819 MS |
598 | |
599 | /* Number of GOTPLT references for a function. */ | |
600 | bfd_signed_vma gotplt_refcount; | |
69fc87f1 MS |
601 | |
602 | #define GOT_UNKNOWN 0 | |
603 | #define GOT_NORMAL 1 | |
604 | #define GOT_TLS_GD 2 | |
605 | #define GOT_TLS_IE 3 | |
606 | #define GOT_TLS_IE_NLT 3 | |
607 | unsigned char tls_type; | |
a85d7ed0 NC |
608 | }; |
609 | ||
69fc87f1 MS |
610 | #define elf_s390_hash_entry(ent) \ |
611 | ((struct elf_s390_link_hash_entry *)(ent)) | |
612 | ||
613 | struct elf_s390_obj_tdata | |
614 | { | |
615 | struct elf_obj_tdata root; | |
616 | ||
617 | /* tls_type for each local got entry. */ | |
618 | char *local_got_tls_type; | |
619 | }; | |
620 | ||
621 | #define elf_s390_tdata(abfd) \ | |
622 | ((struct elf_s390_obj_tdata *) (abfd)->tdata.any) | |
623 | ||
624 | #define elf_s390_local_got_tls_type(abfd) \ | |
625 | (elf_s390_tdata (abfd)->local_got_tls_type) | |
626 | ||
627 | static bfd_boolean | |
628 | elf_s390_mkobject (abfd) | |
629 | bfd *abfd; | |
630 | { | |
631 | bfd_size_type amt = sizeof (struct elf_s390_obj_tdata); | |
632 | abfd->tdata.any = bfd_zalloc (abfd, amt); | |
633 | if (abfd->tdata.any == NULL) | |
634 | return FALSE; | |
635 | return TRUE; | |
636 | } | |
637 | ||
638 | static bfd_boolean | |
639 | elf_s390_object_p (abfd) | |
640 | bfd *abfd; | |
641 | { | |
69fc87f1 MS |
642 | /* Set the right machine number for an s390 elf32 file. */ |
643 | return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64); | |
644 | } | |
645 | ||
a85d7ed0 NC |
646 | /* s390 ELF linker hash table. */ |
647 | ||
648 | struct elf_s390_link_hash_table | |
649 | { | |
0451c93c | 650 | struct elf_link_hash_table elf; |
a85d7ed0 | 651 | |
0451c93c MS |
652 | /* Short-cuts to get to dynamic linker sections. */ |
653 | asection *sgot; | |
654 | asection *sgotplt; | |
655 | asection *srelgot; | |
656 | asection *splt; | |
657 | asection *srelplt; | |
658 | asection *sdynbss; | |
659 | asection *srelbss; | |
ec338859 | 660 | |
69fc87f1 MS |
661 | union { |
662 | bfd_signed_vma refcount; | |
663 | bfd_vma offset; | |
664 | } tls_ldm_got; | |
665 | ||
ec338859 AM |
666 | /* Small local sym to section mapping cache. */ |
667 | struct sym_sec_cache sym_sec; | |
0451c93c | 668 | }; |
a85d7ed0 NC |
669 | |
670 | /* Get the s390 ELF linker hash table from a link_info structure. */ | |
671 | ||
672 | #define elf_s390_hash_table(p) \ | |
673 | ((struct elf_s390_link_hash_table *) ((p)->hash)) | |
674 | ||
675 | /* Create an entry in an s390 ELF linker hash table. */ | |
676 | ||
677 | static struct bfd_hash_entry * | |
0451c93c | 678 | link_hash_newfunc (entry, table, string) |
a85d7ed0 NC |
679 | struct bfd_hash_entry *entry; |
680 | struct bfd_hash_table *table; | |
681 | const char *string; | |
682 | { | |
a85d7ed0 NC |
683 | /* Allocate the structure if it has not already been allocated by a |
684 | subclass. */ | |
0451c93c MS |
685 | if (entry == NULL) |
686 | { | |
687 | entry = bfd_hash_allocate (table, | |
688 | sizeof (struct elf_s390_link_hash_entry)); | |
689 | if (entry == NULL) | |
690 | return entry; | |
691 | } | |
a85d7ed0 NC |
692 | |
693 | /* Call the allocation method of the superclass. */ | |
0451c93c MS |
694 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
695 | if (entry != NULL) | |
a85d7ed0 | 696 | { |
0451c93c MS |
697 | struct elf_s390_link_hash_entry *eh; |
698 | ||
699 | eh = (struct elf_s390_link_hash_entry *) entry; | |
700 | eh->dyn_relocs = NULL; | |
5236c819 | 701 | eh->gotplt_refcount = 0; |
69fc87f1 | 702 | eh->tls_type = GOT_UNKNOWN; |
a85d7ed0 NC |
703 | } |
704 | ||
0451c93c | 705 | return entry; |
a85d7ed0 NC |
706 | } |
707 | ||
708 | /* Create an s390 ELF linker hash table. */ | |
709 | ||
710 | static struct bfd_link_hash_table * | |
711 | elf_s390_link_hash_table_create (abfd) | |
712 | bfd *abfd; | |
713 | { | |
714 | struct elf_s390_link_hash_table *ret; | |
dc810e39 | 715 | bfd_size_type amt = sizeof (struct elf_s390_link_hash_table); |
a85d7ed0 | 716 | |
e2d34d7d | 717 | ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt); |
0451c93c | 718 | if (ret == NULL) |
a85d7ed0 NC |
719 | return NULL; |
720 | ||
0451c93c | 721 | if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc)) |
a85d7ed0 | 722 | { |
e2d34d7d | 723 | free (ret); |
a85d7ed0 NC |
724 | return NULL; |
725 | } | |
726 | ||
0451c93c MS |
727 | ret->sgot = NULL; |
728 | ret->sgotplt = NULL; | |
729 | ret->srelgot = NULL; | |
730 | ret->splt = NULL; | |
731 | ret->srelplt = NULL; | |
732 | ret->sdynbss = NULL; | |
733 | ret->srelbss = NULL; | |
69fc87f1 | 734 | ret->tls_ldm_got.refcount = 0; |
ec338859 | 735 | ret->sym_sec.abfd = NULL; |
0451c93c MS |
736 | |
737 | return &ret->elf.root; | |
738 | } | |
739 | ||
740 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
741 | shortcuts to them in our hash table. */ | |
742 | ||
b34976b6 | 743 | static bfd_boolean |
0451c93c MS |
744 | create_got_section (dynobj, info) |
745 | bfd *dynobj; | |
746 | struct bfd_link_info *info; | |
747 | { | |
748 | struct elf_s390_link_hash_table *htab; | |
749 | ||
750 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 751 | return FALSE; |
0451c93c MS |
752 | |
753 | htab = elf_s390_hash_table (info); | |
754 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
755 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
756 | if (!htab->sgot || !htab->sgotplt) | |
757 | abort (); | |
758 | ||
3496cb2a L |
759 | htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got", |
760 | (SEC_ALLOC | SEC_LOAD | |
761 | | SEC_HAS_CONTENTS | |
762 | | SEC_IN_MEMORY | |
763 | | SEC_LINKER_CREATED | |
764 | | SEC_READONLY)); | |
0451c93c | 765 | if (htab->srelgot == NULL |
99881371 | 766 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) |
b34976b6 AM |
767 | return FALSE; |
768 | return TRUE; | |
0451c93c MS |
769 | } |
770 | ||
771 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
772 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
773 | hash table. */ | |
774 | ||
b34976b6 | 775 | static bfd_boolean |
0451c93c MS |
776 | elf_s390_create_dynamic_sections (dynobj, info) |
777 | bfd *dynobj; | |
778 | struct bfd_link_info *info; | |
779 | { | |
780 | struct elf_s390_link_hash_table *htab; | |
781 | ||
782 | htab = elf_s390_hash_table (info); | |
783 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
b34976b6 | 784 | return FALSE; |
0451c93c MS |
785 | |
786 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
b34976b6 | 787 | return FALSE; |
0451c93c MS |
788 | |
789 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
790 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
791 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
792 | if (!info->shared) | |
793 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
794 | ||
795 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
796 | || (!info->shared && !htab->srelbss)) | |
797 | abort (); | |
798 | ||
b34976b6 | 799 | return TRUE; |
a85d7ed0 NC |
800 | } |
801 | ||
0451c93c MS |
802 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
803 | ||
804 | static void | |
b48fa14c | 805 | elf_s390_copy_indirect_symbol (bed, dir, ind) |
9c5bfbb7 | 806 | const struct elf_backend_data *bed; |
0451c93c MS |
807 | struct elf_link_hash_entry *dir, *ind; |
808 | { | |
809 | struct elf_s390_link_hash_entry *edir, *eind; | |
810 | ||
811 | edir = (struct elf_s390_link_hash_entry *) dir; | |
812 | eind = (struct elf_s390_link_hash_entry *) ind; | |
813 | ||
814 | if (eind->dyn_relocs != NULL) | |
815 | { | |
816 | if (edir->dyn_relocs != NULL) | |
817 | { | |
818 | struct elf_s390_dyn_relocs **pp; | |
819 | struct elf_s390_dyn_relocs *p; | |
820 | ||
821 | if (ind->root.type == bfd_link_hash_indirect) | |
822 | abort (); | |
823 | ||
824 | /* Add reloc counts against the weak sym to the strong sym | |
825 | list. Merge any entries against the same section. */ | |
826 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
827 | { | |
828 | struct elf_s390_dyn_relocs *q; | |
829 | ||
830 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
831 | if (q->sec == p->sec) | |
832 | { | |
833 | q->pc_count += p->pc_count; | |
834 | q->count += p->count; | |
835 | *pp = p->next; | |
836 | break; | |
837 | } | |
838 | if (q == NULL) | |
839 | pp = &p->next; | |
840 | } | |
841 | *pp = edir->dyn_relocs; | |
842 | } | |
843 | ||
844 | edir->dyn_relocs = eind->dyn_relocs; | |
845 | eind->dyn_relocs = NULL; | |
846 | } | |
847 | ||
69fc87f1 MS |
848 | if (ind->root.type == bfd_link_hash_indirect |
849 | && dir->got.refcount <= 0) | |
850 | { | |
851 | edir->tls_type = eind->tls_type; | |
852 | eind->tls_type = GOT_UNKNOWN; | |
853 | } | |
854 | ||
64285810 MS |
855 | if (ELIMINATE_COPY_RELOCS |
856 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
857 | && dir->dynamic_adjusted) |
858 | { | |
859 | /* If called to transfer flags for a weakdef during processing | |
860 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
861 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
862 | dir->ref_dynamic |= ind->ref_dynamic; | |
863 | dir->ref_regular |= ind->ref_regular; | |
864 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
865 | dir->needs_plt |= ind->needs_plt; | |
866 | } | |
64285810 MS |
867 | else |
868 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); | |
0451c93c | 869 | } |
a85d7ed0 | 870 | |
69fc87f1 MS |
871 | static int |
872 | elf_s390_tls_transition (info, r_type, is_local) | |
873 | struct bfd_link_info *info; | |
874 | int r_type; | |
875 | int is_local; | |
876 | { | |
877 | if (info->shared) | |
878 | return r_type; | |
879 | ||
880 | switch (r_type) | |
881 | { | |
882 | case R_390_TLS_GD64: | |
883 | case R_390_TLS_IE64: | |
884 | if (is_local) | |
885 | return R_390_TLS_LE64; | |
886 | return R_390_TLS_IE64; | |
887 | case R_390_TLS_GOTIE64: | |
888 | if (is_local) | |
889 | return R_390_TLS_LE64; | |
890 | return R_390_TLS_GOTIE64; | |
891 | case R_390_TLS_LDM64: | |
892 | return R_390_TLS_LE64; | |
893 | } | |
894 | ||
895 | return r_type; | |
896 | } | |
897 | ||
a85d7ed0 NC |
898 | /* Look through the relocs for a section during the first phase, and |
899 | allocate space in the global offset table or procedure linkage | |
900 | table. */ | |
901 | ||
b34976b6 | 902 | static bfd_boolean |
a85d7ed0 NC |
903 | elf_s390_check_relocs (abfd, info, sec, relocs) |
904 | bfd *abfd; | |
905 | struct bfd_link_info *info; | |
906 | asection *sec; | |
907 | const Elf_Internal_Rela *relocs; | |
908 | { | |
0451c93c | 909 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
910 | Elf_Internal_Shdr *symtab_hdr; |
911 | struct elf_link_hash_entry **sym_hashes; | |
a85d7ed0 NC |
912 | const Elf_Internal_Rela *rel; |
913 | const Elf_Internal_Rela *rel_end; | |
a85d7ed0 | 914 | asection *sreloc; |
5236c819 | 915 | bfd_signed_vma *local_got_refcounts; |
69fc87f1 | 916 | int tls_type, old_tls_type; |
a85d7ed0 | 917 | |
1049f94e | 918 | if (info->relocatable) |
b34976b6 | 919 | return TRUE; |
a85d7ed0 | 920 | |
0451c93c | 921 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
922 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
923 | sym_hashes = elf_sym_hashes (abfd); | |
5236c819 | 924 | local_got_refcounts = elf_local_got_refcounts (abfd); |
a85d7ed0 | 925 | |
a85d7ed0 NC |
926 | sreloc = NULL; |
927 | ||
928 | rel_end = relocs + sec->reloc_count; | |
929 | for (rel = relocs; rel < rel_end; rel++) | |
930 | { | |
69fc87f1 | 931 | unsigned int r_type; |
a85d7ed0 NC |
932 | unsigned long r_symndx; |
933 | struct elf_link_hash_entry *h; | |
934 | ||
935 | r_symndx = ELF64_R_SYM (rel->r_info); | |
936 | ||
0451c93c MS |
937 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
938 | { | |
d003868e AM |
939 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
940 | abfd, | |
0451c93c | 941 | r_symndx); |
b34976b6 | 942 | return FALSE; |
0451c93c MS |
943 | } |
944 | ||
a85d7ed0 NC |
945 | if (r_symndx < symtab_hdr->sh_info) |
946 | h = NULL; | |
947 | else | |
973a3492 L |
948 | { |
949 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
950 | while (h->root.type == bfd_link_hash_indirect | |
951 | || h->root.type == bfd_link_hash_warning) | |
952 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
953 | } | |
a85d7ed0 | 954 | |
5236c819 MS |
955 | /* Create got section and local_got_refcounts array if they |
956 | are needed. */ | |
69fc87f1 MS |
957 | r_type = elf_s390_tls_transition (info, |
958 | ELF64_R_TYPE (rel->r_info), | |
959 | h == NULL); | |
960 | switch (r_type) | |
a85d7ed0 NC |
961 | { |
962 | case R_390_GOT12: | |
947216bf | 963 | case R_390_GOT16: |
bd1ea41b | 964 | case R_390_GOT20: |
a85d7ed0 NC |
965 | case R_390_GOT32: |
966 | case R_390_GOT64: | |
967 | case R_390_GOTENT: | |
5236c819 MS |
968 | case R_390_GOTPLT12: |
969 | case R_390_GOTPLT16: | |
bd1ea41b | 970 | case R_390_GOTPLT20: |
5236c819 MS |
971 | case R_390_GOTPLT32: |
972 | case R_390_GOTPLT64: | |
973 | case R_390_GOTPLTENT: | |
69fc87f1 MS |
974 | case R_390_TLS_GD64: |
975 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 976 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
977 | case R_390_TLS_GOTIE64: |
978 | case R_390_TLS_IEENT: | |
979 | case R_390_TLS_IE64: | |
980 | case R_390_TLS_LDM64: | |
5236c819 MS |
981 | if (h == NULL |
982 | && local_got_refcounts == NULL) | |
a85d7ed0 | 983 | { |
5236c819 | 984 | bfd_size_type size; |
0451c93c | 985 | |
5236c819 | 986 | size = symtab_hdr->sh_info; |
69fc87f1 | 987 | size *= (sizeof (bfd_signed_vma) + sizeof(char)); |
5236c819 MS |
988 | local_got_refcounts = ((bfd_signed_vma *) |
989 | bfd_zalloc (abfd, size)); | |
a85d7ed0 | 990 | if (local_got_refcounts == NULL) |
5236c819 MS |
991 | return FALSE; |
992 | elf_local_got_refcounts (abfd) = local_got_refcounts; | |
69fc87f1 MS |
993 | elf_s390_local_got_tls_type (abfd) |
994 | = (char *) (local_got_refcounts + symtab_hdr->sh_info); | |
a85d7ed0 | 995 | } |
5236c819 MS |
996 | /* Fall through. */ |
997 | case R_390_GOTOFF16: | |
998 | case R_390_GOTOFF32: | |
999 | case R_390_GOTOFF64: | |
0451c93c MS |
1000 | case R_390_GOTPC: |
1001 | case R_390_GOTPCDBL: | |
1002 | if (htab->sgot == NULL) | |
1003 | { | |
1004 | if (htab->elf.dynobj == NULL) | |
1005 | htab->elf.dynobj = abfd; | |
1006 | if (!create_got_section (htab->elf.dynobj, info)) | |
b34976b6 | 1007 | return FALSE; |
0451c93c | 1008 | } |
5236c819 MS |
1009 | } |
1010 | ||
69fc87f1 | 1011 | switch (r_type) |
5236c819 | 1012 | { |
5236c819 MS |
1013 | case R_390_GOTOFF16: |
1014 | case R_390_GOTOFF32: | |
1015 | case R_390_GOTOFF64: | |
1016 | case R_390_GOTPC: | |
1017 | case R_390_GOTPCDBL: | |
1018 | /* Got is created, nothing to be done. */ | |
0451c93c | 1019 | break; |
ec338859 | 1020 | |
947216bf | 1021 | case R_390_PLT16DBL: |
a85d7ed0 NC |
1022 | case R_390_PLT32: |
1023 | case R_390_PLT32DBL: | |
1024 | case R_390_PLT64: | |
5236c819 MS |
1025 | case R_390_PLTOFF16: |
1026 | case R_390_PLTOFF32: | |
1027 | case R_390_PLTOFF64: | |
a85d7ed0 | 1028 | /* This symbol requires a procedure linkage table entry. We |
947216bf AM |
1029 | actually build the entry in adjust_dynamic_symbol, |
1030 | because this might be a case of linking PIC code which is | |
1031 | never referenced by a dynamic object, in which case we | |
1032 | don't need to generate a procedure linkage table entry | |
1033 | after all. */ | |
ec338859 | 1034 | |
a85d7ed0 | 1035 | /* If this is a local symbol, we resolve it directly without |
947216bf | 1036 | creating a procedure linkage table entry. */ |
5236c819 MS |
1037 | if (h != NULL) |
1038 | { | |
f5385ebf | 1039 | h->needs_plt = 1; |
5236c819 MS |
1040 | h->plt.refcount += 1; |
1041 | } | |
1042 | break; | |
ec338859 | 1043 | |
5236c819 MS |
1044 | case R_390_GOTPLT12: |
1045 | case R_390_GOTPLT16: | |
bd1ea41b | 1046 | case R_390_GOTPLT20: |
5236c819 MS |
1047 | case R_390_GOTPLT32: |
1048 | case R_390_GOTPLT64: | |
1049 | case R_390_GOTPLTENT: | |
1050 | /* This symbol requires either a procedure linkage table entry | |
1051 | or an entry in the local got. We actually build the entry | |
1052 | in adjust_dynamic_symbol because whether this is really a | |
1053 | global reference can change and with it the fact if we have | |
1054 | to create a plt entry or a local got entry. To be able to | |
1055 | make a once global symbol a local one we have to keep track | |
1056 | of the number of gotplt references that exist for this | |
1057 | symbol. */ | |
1058 | if (h != NULL) | |
1059 | { | |
1060 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++; | |
f5385ebf | 1061 | h->needs_plt = 1; |
5236c819 MS |
1062 | h->plt.refcount += 1; |
1063 | } | |
69fc87f1 MS |
1064 | else |
1065 | local_got_refcounts[r_symndx] += 1; | |
1066 | break; | |
1067 | ||
1068 | case R_390_TLS_LDM64: | |
1069 | htab->tls_ldm_got.refcount += 1; | |
1070 | break; | |
1071 | ||
1072 | case R_390_TLS_IE64: | |
1073 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1074 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1075 | case R_390_TLS_GOTIE64: |
1076 | case R_390_TLS_IEENT: | |
1077 | if (info->shared) | |
1078 | info->flags |= DF_STATIC_TLS; | |
1079 | /* Fall through */ | |
1080 | ||
1081 | case R_390_GOT12: | |
26e41594 | 1082 | case R_390_GOT16: |
bd1ea41b | 1083 | case R_390_GOT20: |
69fc87f1 MS |
1084 | case R_390_GOT32: |
1085 | case R_390_GOT64: | |
1086 | case R_390_GOTENT: | |
1087 | case R_390_TLS_GD64: | |
1088 | /* This symbol requires a global offset table entry. */ | |
1089 | switch (r_type) | |
1090 | { | |
1091 | default: | |
1092 | case R_390_GOT12: | |
1093 | case R_390_GOT16: | |
bd1ea41b | 1094 | case R_390_GOT20: |
69fc87f1 MS |
1095 | case R_390_GOT32: |
1096 | case R_390_GOTENT: | |
1097 | tls_type = GOT_NORMAL; | |
1098 | break; | |
1099 | case R_390_TLS_GD64: | |
1100 | tls_type = GOT_TLS_GD; | |
1101 | break; | |
1102 | case R_390_TLS_IE64: | |
1103 | case R_390_TLS_GOTIE64: | |
1104 | tls_type = GOT_TLS_IE; | |
1105 | break; | |
1106 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1107 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1108 | case R_390_TLS_IEENT: |
1109 | tls_type = GOT_TLS_IE_NLT; | |
1110 | break; | |
1111 | } | |
1112 | ||
1113 | if (h != NULL) | |
1114 | { | |
1115 | h->got.refcount += 1; | |
1116 | old_tls_type = elf_s390_hash_entry(h)->tls_type; | |
1117 | } | |
5236c819 MS |
1118 | else |
1119 | { | |
1120 | local_got_refcounts[r_symndx] += 1; | |
69fc87f1 | 1121 | old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx]; |
5236c819 | 1122 | } |
69fc87f1 MS |
1123 | /* If a TLS symbol is accessed using IE at least once, |
1124 | there is no point to use dynamic model for it. */ | |
1125 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN) | |
1126 | { | |
1127 | if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL) | |
1128 | { | |
1129 | (*_bfd_error_handler) | |
d003868e AM |
1130 | (_("%B: `%s' accessed both as normal and thread local symbol"), |
1131 | abfd, h->root.root.string); | |
69fc87f1 MS |
1132 | return FALSE; |
1133 | } | |
1134 | if (old_tls_type > tls_type) | |
1135 | tls_type = old_tls_type; | |
1136 | } | |
1137 | ||
1138 | if (old_tls_type != tls_type) | |
1139 | { | |
1140 | if (h != NULL) | |
1141 | elf_s390_hash_entry (h)->tls_type = tls_type; | |
1142 | else | |
1143 | elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1144 | } | |
1145 | ||
1146 | if (r_type != R_390_TLS_IE64) | |
1147 | break; | |
1148 | /* Fall through */ | |
1149 | ||
1150 | case R_390_TLS_LE64: | |
1151 | if (!info->shared) | |
1152 | break; | |
1153 | info->flags |= DF_STATIC_TLS; | |
1154 | /* Fall through */ | |
ec338859 | 1155 | |
947216bf AM |
1156 | case R_390_8: |
1157 | case R_390_16: | |
a85d7ed0 NC |
1158 | case R_390_32: |
1159 | case R_390_64: | |
947216bf AM |
1160 | case R_390_PC16: |
1161 | case R_390_PC16DBL: | |
a85d7ed0 NC |
1162 | case R_390_PC32: |
1163 | case R_390_PC32DBL: | |
1164 | case R_390_PC64: | |
0451c93c MS |
1165 | if (h != NULL && !info->shared) |
1166 | { | |
1167 | /* If this reloc is in a read-only section, we might | |
1168 | need a copy reloc. We can't check reliably at this | |
1169 | stage whether the section is read-only, as input | |
1170 | sections have not yet been mapped to output sections. | |
1171 | Tentatively set the flag for now, and correct in | |
1172 | adjust_dynamic_symbol. */ | |
f5385ebf | 1173 | h->non_got_ref = 1; |
ec338859 | 1174 | |
0451c93c MS |
1175 | /* We may need a .plt entry if the function this reloc |
1176 | refers to is in a shared lib. */ | |
1177 | h->plt.refcount += 1; | |
1178 | } | |
ec338859 | 1179 | |
a85d7ed0 | 1180 | /* If we are creating a shared library, and this is a reloc |
0451c93c MS |
1181 | against a global symbol, or a non PC relative reloc |
1182 | against a local symbol, then we need to copy the reloc | |
1183 | into the shared library. However, if we are linking with | |
1184 | -Bsymbolic, we do not need to copy a reloc against a | |
1185 | global symbol which is defined in an object we are | |
1186 | including in the link (i.e., DEF_REGULAR is set). At | |
1187 | this point we have not seen all the input files, so it is | |
1188 | possible that DEF_REGULAR is not set now but will be set | |
1189 | later (it is never cleared). In case of a weak definition, | |
1190 | DEF_REGULAR may be cleared later by a strong definition in | |
1191 | a shared library. We account for that possibility below by | |
1192 | storing information in the relocs_copied field of the hash | |
1193 | table entry. A similar situation occurs when creating | |
1194 | shared libraries and symbol visibility changes render the | |
1195 | symbol local. | |
1196 | ||
1197 | If on the other hand, we are creating an executable, we | |
1198 | may need to keep relocations for symbols satisfied by a | |
1199 | dynamic library if we manage to avoid copy relocs for the | |
1200 | symbol. */ | |
1201 | if ((info->shared | |
1202 | && (sec->flags & SEC_ALLOC) != 0 | |
1203 | && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16 | |
1204 | && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL | |
1205 | && ELF64_R_TYPE (rel->r_info) != R_390_PC32 | |
1206 | && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL | |
1207 | && ELF64_R_TYPE (rel->r_info) != R_390_PC64) | |
1208 | || (h != NULL | |
1209 | && (! info->symbolic | |
1210 | || h->root.type == bfd_link_hash_defweak | |
f5385ebf | 1211 | || !h->def_regular)))) |
64285810 MS |
1212 | || (ELIMINATE_COPY_RELOCS |
1213 | && !info->shared | |
0451c93c MS |
1214 | && (sec->flags & SEC_ALLOC) != 0 |
1215 | && h != NULL | |
1216 | && (h->root.type == bfd_link_hash_defweak | |
f5385ebf | 1217 | || !h->def_regular))) |
a85d7ed0 | 1218 | { |
ec338859 AM |
1219 | struct elf_s390_dyn_relocs *p; |
1220 | struct elf_s390_dyn_relocs **head; | |
1221 | ||
0451c93c MS |
1222 | /* We must copy these reloc types into the output file. |
1223 | Create a reloc section in dynobj and make room for | |
1224 | this reloc. */ | |
a85d7ed0 NC |
1225 | if (sreloc == NULL) |
1226 | { | |
1227 | const char *name; | |
0451c93c | 1228 | bfd *dynobj; |
ec338859 | 1229 | |
a85d7ed0 NC |
1230 | name = (bfd_elf_string_from_elf_section |
1231 | (abfd, | |
1232 | elf_elfheader (abfd)->e_shstrndx, | |
1233 | elf_section_data (sec)->rel_hdr.sh_name)); | |
1234 | if (name == NULL) | |
b34976b6 | 1235 | return FALSE; |
ec338859 | 1236 | |
0451c93c MS |
1237 | if (strncmp (name, ".rela", 5) != 0 |
1238 | || strcmp (bfd_get_section_name (abfd, sec), | |
1239 | name + 5) != 0) | |
1240 | { | |
1241 | (*_bfd_error_handler) | |
d003868e AM |
1242 | (_("%B: bad relocation section name `%s\'"), |
1243 | abfd, name); | |
0451c93c | 1244 | } |
ec338859 | 1245 | |
0451c93c MS |
1246 | if (htab->elf.dynobj == NULL) |
1247 | htab->elf.dynobj = abfd; | |
a85d7ed0 | 1248 | |
0451c93c | 1249 | dynobj = htab->elf.dynobj; |
a85d7ed0 NC |
1250 | sreloc = bfd_get_section_by_name (dynobj, name); |
1251 | if (sreloc == NULL) | |
1252 | { | |
1253 | flagword flags; | |
ec338859 | 1254 | |
a85d7ed0 NC |
1255 | flags = (SEC_HAS_CONTENTS | SEC_READONLY |
1256 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
1257 | if ((sec->flags & SEC_ALLOC) != 0) | |
1258 | flags |= SEC_ALLOC | SEC_LOAD; | |
3496cb2a L |
1259 | sreloc = bfd_make_section_with_flags (dynobj, |
1260 | name, | |
1261 | flags); | |
a85d7ed0 | 1262 | if (sreloc == NULL |
99881371 | 1263 | || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
b34976b6 | 1264 | return FALSE; |
a85d7ed0 | 1265 | } |
0451c93c | 1266 | elf_section_data (sec)->sreloc = sreloc; |
a85d7ed0 | 1267 | } |
ec338859 | 1268 | |
0451c93c MS |
1269 | /* If this is a global symbol, we count the number of |
1270 | relocations we need for this symbol. */ | |
1271 | if (h != NULL) | |
a85d7ed0 | 1272 | { |
ec338859 | 1273 | head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs; |
0451c93c MS |
1274 | } |
1275 | else | |
1276 | { | |
ec338859 AM |
1277 | /* Track dynamic relocs needed for local syms too. |
1278 | We really need local syms available to do this | |
1279 | easily. Oh well. */ | |
1280 | ||
1281 | asection *s; | |
1282 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
1283 | sec, r_symndx); | |
1284 | if (s == NULL) | |
b34976b6 | 1285 | return FALSE; |
ec338859 AM |
1286 | |
1287 | head = ((struct elf_s390_dyn_relocs **) | |
1288 | &elf_section_data (s)->local_dynrel); | |
1289 | } | |
1290 | ||
1291 | p = *head; | |
1292 | if (p == NULL || p->sec != sec) | |
1293 | { | |
1294 | bfd_size_type amt = sizeof *p; | |
1295 | p = ((struct elf_s390_dyn_relocs *) | |
1296 | bfd_alloc (htab->elf.dynobj, amt)); | |
1297 | if (p == NULL) | |
b34976b6 | 1298 | return FALSE; |
ec338859 AM |
1299 | p->next = *head; |
1300 | *head = p; | |
1301 | p->sec = sec; | |
1302 | p->count = 0; | |
1303 | p->pc_count = 0; | |
a85d7ed0 | 1304 | } |
ec338859 AM |
1305 | |
1306 | p->count += 1; | |
1307 | if (ELF64_R_TYPE (rel->r_info) == R_390_PC16 | |
1308 | || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL | |
1309 | || ELF64_R_TYPE (rel->r_info) == R_390_PC32 | |
1310 | || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL | |
1311 | || ELF64_R_TYPE (rel->r_info) == R_390_PC64) | |
1312 | p->pc_count += 1; | |
a85d7ed0 | 1313 | } |
a85d7ed0 | 1314 | break; |
ec338859 | 1315 | |
a85d7ed0 NC |
1316 | /* This relocation describes the C++ object vtable hierarchy. |
1317 | Reconstruct it for later use during GC. */ | |
947216bf | 1318 | case R_390_GNU_VTINHERIT: |
c152c796 | 1319 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 1320 | return FALSE; |
947216bf | 1321 | break; |
ec338859 | 1322 | |
a85d7ed0 NC |
1323 | /* This relocation describes which C++ vtable entries are actually |
1324 | used. Record for later use during GC. */ | |
947216bf | 1325 | case R_390_GNU_VTENTRY: |
c152c796 | 1326 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
b34976b6 | 1327 | return FALSE; |
947216bf | 1328 | break; |
ec338859 | 1329 | |
a85d7ed0 NC |
1330 | default: |
1331 | break; | |
1332 | } | |
1333 | } | |
1334 | ||
b34976b6 | 1335 | return TRUE; |
a85d7ed0 NC |
1336 | } |
1337 | ||
1338 | /* Return the section that should be marked against GC for a given | |
1339 | relocation. */ | |
1340 | ||
1341 | static asection * | |
1e2f5b6e AM |
1342 | elf_s390_gc_mark_hook (sec, info, rel, h, sym) |
1343 | asection *sec; | |
a85d7ed0 NC |
1344 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
1345 | Elf_Internal_Rela *rel; | |
1346 | struct elf_link_hash_entry *h; | |
1347 | Elf_Internal_Sym *sym; | |
1348 | { | |
1349 | if (h != NULL) | |
1350 | { | |
1351 | switch (ELF64_R_TYPE (rel->r_info)) | |
1352 | { | |
1353 | case R_390_GNU_VTINHERIT: | |
1354 | case R_390_GNU_VTENTRY: | |
1355 | break; | |
1356 | ||
1357 | default: | |
1358 | switch (h->root.type) | |
1359 | { | |
1360 | case bfd_link_hash_defined: | |
1361 | case bfd_link_hash_defweak: | |
1362 | return h->root.u.def.section; | |
1363 | ||
1364 | case bfd_link_hash_common: | |
1365 | return h->root.u.c.p->section; | |
1366 | ||
1367 | default: | |
1368 | break; | |
1369 | } | |
1370 | } | |
1371 | } | |
1372 | else | |
1e2f5b6e | 1373 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
a85d7ed0 NC |
1374 | |
1375 | return NULL; | |
1376 | } | |
1377 | ||
1378 | /* Update the got entry reference counts for the section being removed. */ | |
1379 | ||
b34976b6 | 1380 | static bfd_boolean |
a85d7ed0 | 1381 | elf_s390_gc_sweep_hook (abfd, info, sec, relocs) |
0451c93c MS |
1382 | bfd *abfd; |
1383 | struct bfd_link_info *info; | |
1384 | asection *sec; | |
1385 | const Elf_Internal_Rela *relocs; | |
a85d7ed0 NC |
1386 | { |
1387 | Elf_Internal_Shdr *symtab_hdr; | |
1388 | struct elf_link_hash_entry **sym_hashes; | |
1389 | bfd_signed_vma *local_got_refcounts; | |
1390 | const Elf_Internal_Rela *rel, *relend; | |
a85d7ed0 | 1391 | |
ec338859 | 1392 | elf_section_data (sec)->local_dynrel = NULL; |
a85d7ed0 | 1393 | |
0451c93c MS |
1394 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1395 | sym_hashes = elf_sym_hashes (abfd); | |
1396 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
a85d7ed0 NC |
1397 | |
1398 | relend = relocs + sec->reloc_count; | |
1399 | for (rel = relocs; rel < relend; rel++) | |
5236c819 | 1400 | { |
26e41594 AM |
1401 | unsigned long r_symndx; |
1402 | unsigned int r_type; | |
1403 | struct elf_link_hash_entry *h = NULL; | |
1404 | ||
5236c819 | 1405 | r_symndx = ELF64_R_SYM (rel->r_info); |
26e41594 AM |
1406 | if (r_symndx >= symtab_hdr->sh_info) |
1407 | { | |
1408 | struct elf_s390_link_hash_entry *eh; | |
1409 | struct elf_s390_dyn_relocs **pp; | |
1410 | struct elf_s390_dyn_relocs *p; | |
5236c819 | 1411 | |
26e41594 | 1412 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1413 | while (h->root.type == bfd_link_hash_indirect |
1414 | || h->root.type == bfd_link_hash_warning) | |
1415 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1416 | eh = (struct elf_s390_link_hash_entry *) h; |
5236c819 | 1417 | |
26e41594 AM |
1418 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1419 | if (p->sec == sec) | |
1420 | { | |
1421 | /* Everything must go for SEC. */ | |
1422 | *pp = p->next; | |
1423 | break; | |
1424 | } | |
1425 | } | |
1426 | ||
1427 | r_type = ELF64_R_TYPE (rel->r_info); | |
1428 | r_type = elf_s390_tls_transition (info, r_type, h != NULL); | |
69fc87f1 | 1429 | switch (r_type) |
5236c819 | 1430 | { |
69fc87f1 MS |
1431 | case R_390_TLS_LDM64: |
1432 | if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0) | |
1433 | elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1; | |
1434 | break; | |
1435 | ||
1436 | case R_390_TLS_GD64: | |
1437 | case R_390_TLS_IE64: | |
1438 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 1439 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
1440 | case R_390_TLS_GOTIE64: |
1441 | case R_390_TLS_IEENT: | |
5236c819 MS |
1442 | case R_390_GOT12: |
1443 | case R_390_GOT16: | |
bd1ea41b | 1444 | case R_390_GOT20: |
5236c819 MS |
1445 | case R_390_GOT32: |
1446 | case R_390_GOT64: | |
1447 | case R_390_GOTOFF16: | |
1448 | case R_390_GOTOFF32: | |
1449 | case R_390_GOTOFF64: | |
1450 | case R_390_GOTPC: | |
1451 | case R_390_GOTPCDBL: | |
1452 | case R_390_GOTENT: | |
1453 | if (h != NULL) | |
1454 | { | |
1455 | if (h->got.refcount > 0) | |
1456 | h->got.refcount -= 1; | |
1457 | } | |
1458 | else if (local_got_refcounts != NULL) | |
1459 | { | |
1460 | if (local_got_refcounts[r_symndx] > 0) | |
1461 | local_got_refcounts[r_symndx] -= 1; | |
1462 | } | |
26e41594 | 1463 | break; |
a85d7ed0 | 1464 | |
5236c819 MS |
1465 | case R_390_8: |
1466 | case R_390_12: | |
1467 | case R_390_16: | |
bd1ea41b | 1468 | case R_390_20: |
5236c819 MS |
1469 | case R_390_32: |
1470 | case R_390_64: | |
1471 | case R_390_PC16: | |
1472 | case R_390_PC16DBL: | |
1473 | case R_390_PC32: | |
1474 | case R_390_PC32DBL: | |
1475 | case R_390_PC64: | |
26e41594 AM |
1476 | if (info->shared) |
1477 | break; | |
1478 | /* Fall through */ | |
a85d7ed0 | 1479 | |
69fc87f1 MS |
1480 | case R_390_PLT16DBL: |
1481 | case R_390_PLT32: | |
1482 | case R_390_PLT32DBL: | |
1483 | case R_390_PLT64: | |
1484 | case R_390_PLTOFF16: | |
1485 | case R_390_PLTOFF32: | |
1486 | case R_390_PLTOFF64: | |
1487 | if (h != NULL) | |
1488 | { | |
1489 | if (h->plt.refcount > 0) | |
1490 | h->plt.refcount -= 1; | |
1491 | } | |
1492 | break; | |
1493 | ||
1494 | case R_390_GOTPLT12: | |
1495 | case R_390_GOTPLT16: | |
bd1ea41b | 1496 | case R_390_GOTPLT20: |
69fc87f1 MS |
1497 | case R_390_GOTPLT32: |
1498 | case R_390_GOTPLT64: | |
1499 | case R_390_GOTPLTENT: | |
1500 | if (h != NULL) | |
1501 | { | |
1502 | if (h->plt.refcount > 0) | |
1503 | { | |
1504 | ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--; | |
1505 | h->plt.refcount -= 1; | |
1506 | } | |
1507 | } | |
1508 | else if (local_got_refcounts != NULL) | |
1509 | { | |
1510 | if (local_got_refcounts[r_symndx] > 0) | |
1511 | local_got_refcounts[r_symndx] -= 1; | |
1512 | } | |
1513 | break; | |
1514 | ||
5236c819 MS |
1515 | default: |
1516 | break; | |
1517 | } | |
1518 | } | |
a85d7ed0 | 1519 | |
b34976b6 | 1520 | return TRUE; |
a85d7ed0 NC |
1521 | } |
1522 | ||
5236c819 MS |
1523 | /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT |
1524 | entry but we found we will not create any. Called when we find we will | |
1525 | not have any PLT for this symbol, by for example | |
1526 | elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link, | |
1527 | or elf_s390_size_dynamic_sections if no dynamic sections will be | |
1528 | created (we're only linking static objects). */ | |
1529 | ||
1530 | static void | |
1531 | elf_s390_adjust_gotplt (h) | |
1532 | struct elf_s390_link_hash_entry *h; | |
1533 | { | |
1534 | if (h->elf.root.type == bfd_link_hash_warning) | |
1535 | h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link; | |
1536 | ||
1537 | if (h->gotplt_refcount <= 0) | |
1538 | return; | |
1539 | ||
1540 | /* We simply add the number of gotplt references to the number | |
1541 | * of got references for this symbol. */ | |
1542 | h->elf.got.refcount += h->gotplt_refcount; | |
1543 | h->gotplt_refcount = -1; | |
1544 | } | |
1545 | ||
a85d7ed0 NC |
1546 | /* Adjust a symbol defined by a dynamic object and referenced by a |
1547 | regular object. The current definition is in some section of the | |
1548 | dynamic object, but we're not including those sections. We have to | |
1549 | change the definition to something the rest of the link can | |
1550 | understand. */ | |
1551 | ||
b34976b6 | 1552 | static bfd_boolean |
a85d7ed0 NC |
1553 | elf_s390_adjust_dynamic_symbol (info, h) |
1554 | struct bfd_link_info *info; | |
1555 | struct elf_link_hash_entry *h; | |
1556 | { | |
0451c93c | 1557 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
1558 | asection *s; |
1559 | unsigned int power_of_two; | |
1560 | ||
a85d7ed0 NC |
1561 | /* If this is a function, put it in the procedure linkage table. We |
1562 | will fill in the contents of the procedure linkage table later | |
cedb70c5 | 1563 | (although we could actually do it here). */ |
a85d7ed0 | 1564 | if (h->type == STT_FUNC |
f5385ebf | 1565 | || h->needs_plt) |
a85d7ed0 | 1566 | { |
0451c93c MS |
1567 | if (h->plt.refcount <= 0 |
1568 | || (! info->shared | |
f5385ebf AM |
1569 | && !h->def_dynamic |
1570 | && !h->ref_dynamic | |
f9cd9119 MS |
1571 | && h->root.type != bfd_link_hash_undefweak |
1572 | && h->root.type != bfd_link_hash_undefined)) | |
a85d7ed0 NC |
1573 | { |
1574 | /* This case can occur if we saw a PLT32 reloc in an input | |
947216bf AM |
1575 | file, but the symbol was never referred to by a dynamic |
1576 | object, or if all references were garbage collected. In | |
0451c93c MS |
1577 | such a case, we don't actually need to build a procedure |
1578 | linkage table, and we can just do a PC32 reloc instead. */ | |
a85d7ed0 | 1579 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 1580 | h->needs_plt = 0; |
5236c819 | 1581 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
a85d7ed0 NC |
1582 | } |
1583 | ||
b34976b6 | 1584 | return TRUE; |
a85d7ed0 | 1585 | } |
bbd7ec4a | 1586 | else |
0451c93c MS |
1587 | /* It's possible that we incorrectly decided a .plt reloc was |
1588 | needed for an R_390_PC32 reloc to a non-function sym in | |
1589 | check_relocs. We can't decide accurately between function and | |
1590 | non-function syms in check-relocs; Objects loaded later in | |
1591 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1592 | h->plt.offset = (bfd_vma) -1; |
a85d7ed0 NC |
1593 | |
1594 | /* If this is a weak symbol, and there is a real definition, the | |
1595 | processor independent code will have arranged for us to see the | |
1596 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 1597 | if (h->u.weakdef != NULL) |
a85d7ed0 | 1598 | { |
f6e332e6 AM |
1599 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1600 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1601 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1602 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
64285810 | 1603 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 1604 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 1605 | return TRUE; |
a85d7ed0 NC |
1606 | } |
1607 | ||
1608 | /* This is a reference to a symbol defined by a dynamic object which | |
1609 | is not a function. */ | |
1610 | ||
1611 | /* If we are creating a shared library, we must presume that the | |
1612 | only references to the symbol are via the global offset table. | |
1613 | For such cases we need not do anything here; the relocations will | |
1614 | be handled correctly by relocate_section. */ | |
1615 | if (info->shared) | |
b34976b6 | 1616 | return TRUE; |
a85d7ed0 NC |
1617 | |
1618 | /* If there are no references to this symbol that do not use the | |
1619 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 1620 | if (!h->non_got_ref) |
b34976b6 | 1621 | return TRUE; |
a85d7ed0 | 1622 | |
0451c93c MS |
1623 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1624 | if (info->nocopyreloc) | |
1625 | { | |
f5385ebf | 1626 | h->non_got_ref = 0; |
b34976b6 | 1627 | return TRUE; |
0451c93c MS |
1628 | } |
1629 | ||
64285810 | 1630 | if (ELIMINATE_COPY_RELOCS) |
0451c93c | 1631 | { |
64285810 MS |
1632 | struct elf_s390_link_hash_entry * eh; |
1633 | struct elf_s390_dyn_relocs *p; | |
0451c93c | 1634 | |
64285810 MS |
1635 | eh = (struct elf_s390_link_hash_entry *) h; |
1636 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1637 | { | |
1638 | s = p->sec->output_section; | |
1639 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1640 | break; | |
1641 | } | |
1642 | ||
1643 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1644 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1645 | if (p == NULL) | |
1646 | { | |
f5385ebf | 1647 | h->non_got_ref = 0; |
64285810 MS |
1648 | return TRUE; |
1649 | } | |
0451c93c MS |
1650 | } |
1651 | ||
a85d7ed0 NC |
1652 | /* We must allocate the symbol in our .dynbss section, which will |
1653 | become part of the .bss section of the executable. There will be | |
1654 | an entry for this symbol in the .dynsym section. The dynamic | |
1655 | object will contain position independent code, so all references | |
1656 | from the dynamic object to this symbol will go through the global | |
1657 | offset table. The dynamic linker will use the .dynsym entry to | |
1658 | determine the address it must put in the global offset table, so | |
1659 | both the dynamic object and the regular object will refer to the | |
1660 | same memory location for the variable. */ | |
1661 | ||
0451c93c | 1662 | htab = elf_s390_hash_table (info); |
a85d7ed0 | 1663 | |
0451c93c MS |
1664 | /* We must generate a R_390_COPY reloc to tell the dynamic linker to |
1665 | copy the initial value out of the dynamic object and into the | |
1666 | runtime process image. */ | |
a85d7ed0 NC |
1667 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1668 | { | |
eea6121a | 1669 | htab->srelbss->size += sizeof (Elf64_External_Rela); |
f5385ebf | 1670 | h->needs_copy = 1; |
a85d7ed0 NC |
1671 | } |
1672 | ||
1673 | /* We need to figure out the alignment required for this symbol. I | |
1674 | have no idea how ELF linkers handle this. */ | |
1675 | power_of_two = bfd_log2 (h->size); | |
1676 | if (power_of_two > 3) | |
1677 | power_of_two = 3; | |
1678 | ||
1679 | /* Apply the required alignment. */ | |
0451c93c | 1680 | s = htab->sdynbss; |
eea6121a | 1681 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); |
0451c93c | 1682 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) |
a85d7ed0 | 1683 | { |
0451c93c | 1684 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
b34976b6 | 1685 | return FALSE; |
a85d7ed0 NC |
1686 | } |
1687 | ||
1688 | /* Define the symbol as being at this point in the section. */ | |
1689 | h->root.u.def.section = s; | |
eea6121a | 1690 | h->root.u.def.value = s->size; |
a85d7ed0 NC |
1691 | |
1692 | /* Increment the section size to make room for the symbol. */ | |
eea6121a | 1693 | s->size += h->size; |
a85d7ed0 | 1694 | |
b34976b6 | 1695 | return TRUE; |
a85d7ed0 NC |
1696 | } |
1697 | ||
0451c93c MS |
1698 | /* Allocate space in .plt, .got and associated reloc sections for |
1699 | dynamic relocs. */ | |
1700 | ||
b34976b6 | 1701 | static bfd_boolean |
0451c93c MS |
1702 | allocate_dynrelocs (h, inf) |
1703 | struct elf_link_hash_entry *h; | |
1704 | PTR inf; | |
1705 | { | |
1706 | struct bfd_link_info *info; | |
1707 | struct elf_s390_link_hash_table *htab; | |
1708 | struct elf_s390_link_hash_entry *eh; | |
1709 | struct elf_s390_dyn_relocs *p; | |
1710 | ||
e92d460e | 1711 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1712 | return TRUE; |
0451c93c | 1713 | |
e92d460e | 1714 | if (h->root.type == bfd_link_hash_warning) |
5236c819 MS |
1715 | /* When warning symbols are created, they **replace** the "real" |
1716 | entry in the hash table, thus we never get to see the real | |
1717 | symbol in a hash traversal. So look at it now. */ | |
e92d460e AM |
1718 | h = (struct elf_link_hash_entry *) h->root.u.i.link; |
1719 | ||
0451c93c MS |
1720 | info = (struct bfd_link_info *) inf; |
1721 | htab = elf_s390_hash_table (info); | |
1722 | ||
1723 | if (htab->elf.dynamic_sections_created | |
82058a73 MS |
1724 | && h->plt.refcount > 0 |
1725 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1726 | || h->root.type != bfd_link_hash_undefweak)) | |
0451c93c MS |
1727 | { |
1728 | /* Make sure this symbol is output as a dynamic symbol. | |
1729 | Undefined weak syms won't yet be marked as dynamic. */ | |
1730 | if (h->dynindx == -1 | |
f5385ebf | 1731 | && !h->forced_local) |
0451c93c | 1732 | { |
c152c796 | 1733 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1734 | return FALSE; |
0451c93c MS |
1735 | } |
1736 | ||
82058a73 | 1737 | if (info->shared |
4ec72bde | 1738 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
0451c93c MS |
1739 | { |
1740 | asection *s = htab->splt; | |
1741 | ||
1742 | /* If this is the first .plt entry, make room for the special | |
1743 | first entry. */ | |
eea6121a AM |
1744 | if (s->size == 0) |
1745 | s->size += PLT_FIRST_ENTRY_SIZE; | |
0451c93c | 1746 | |
eea6121a | 1747 | h->plt.offset = s->size; |
0451c93c MS |
1748 | |
1749 | /* If this symbol is not defined in a regular file, and we are | |
1750 | not generating a shared library, then set the symbol to this | |
1751 | location in the .plt. This is required to make function | |
1752 | pointers compare as equal between the normal executable and | |
1753 | the shared library. */ | |
1754 | if (! info->shared | |
f5385ebf | 1755 | && !h->def_regular) |
0451c93c MS |
1756 | { |
1757 | h->root.u.def.section = s; | |
1758 | h->root.u.def.value = h->plt.offset; | |
1759 | } | |
ec338859 | 1760 | |
0451c93c | 1761 | /* Make room for this entry. */ |
eea6121a | 1762 | s->size += PLT_ENTRY_SIZE; |
ec338859 | 1763 | |
0451c93c MS |
1764 | /* We also need to make an entry in the .got.plt section, which |
1765 | will be placed in the .got section by the linker script. */ | |
eea6121a | 1766 | htab->sgotplt->size += GOT_ENTRY_SIZE; |
0451c93c MS |
1767 | |
1768 | /* We also need to make an entry in the .rela.plt section. */ | |
eea6121a | 1769 | htab->srelplt->size += sizeof (Elf64_External_Rela); |
0451c93c MS |
1770 | } |
1771 | else | |
1772 | { | |
1773 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1774 | h->needs_plt = 0; |
5236c819 | 1775 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
0451c93c MS |
1776 | } |
1777 | } | |
1778 | else | |
1779 | { | |
1780 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1781 | h->needs_plt = 0; |
5236c819 | 1782 | elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h); |
0451c93c MS |
1783 | } |
1784 | ||
69fc87f1 MS |
1785 | /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to |
1786 | the binary, we can optimize a bit. IE64 and GOTIE64 get converted | |
1787 | to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT | |
1788 | we can save the dynamic TLS relocation. */ | |
1789 | if (h->got.refcount > 0 | |
1790 | && !info->shared | |
1791 | && h->dynindx == -1 | |
1792 | && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE) | |
1793 | { | |
1794 | if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT) | |
1795 | /* For the GOTIE access without a literal pool entry the offset has | |
1796 | to be stored somewhere. The immediate value in the instruction | |
1797 | is not bit enough so the value is stored in the got. */ | |
1798 | { | |
eea6121a AM |
1799 | h->got.offset = htab->sgot->size; |
1800 | htab->sgot->size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
1801 | } |
1802 | else | |
1803 | h->got.offset = (bfd_vma) -1; | |
1804 | } | |
1805 | else if (h->got.refcount > 0) | |
0451c93c MS |
1806 | { |
1807 | asection *s; | |
b34976b6 | 1808 | bfd_boolean dyn; |
69fc87f1 | 1809 | int tls_type = elf_s390_hash_entry(h)->tls_type; |
0451c93c MS |
1810 | |
1811 | /* Make sure this symbol is output as a dynamic symbol. | |
1812 | Undefined weak syms won't yet be marked as dynamic. */ | |
1813 | if (h->dynindx == -1 | |
f5385ebf | 1814 | && !h->forced_local) |
0451c93c | 1815 | { |
c152c796 | 1816 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1817 | return FALSE; |
0451c93c MS |
1818 | } |
1819 | ||
1820 | s = htab->sgot; | |
eea6121a AM |
1821 | h->got.offset = s->size; |
1822 | s->size += GOT_ENTRY_SIZE; | |
69fc87f1 MS |
1823 | /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */ |
1824 | if (tls_type == GOT_TLS_GD) | |
eea6121a | 1825 | s->size += GOT_ENTRY_SIZE; |
0451c93c | 1826 | dyn = htab->elf.dynamic_sections_created; |
69fc87f1 MS |
1827 | /* R_390_TLS_IE64 needs one dynamic relocation, |
1828 | R_390_TLS_GD64 needs one if local symbol and two if global. */ | |
1829 | if ((tls_type == GOT_TLS_GD && h->dynindx == -1) | |
1830 | || tls_type >= GOT_TLS_IE) | |
eea6121a | 1831 | htab->srelgot->size += sizeof (Elf64_External_Rela); |
69fc87f1 | 1832 | else if (tls_type == GOT_TLS_GD) |
eea6121a | 1833 | htab->srelgot->size += 2 * sizeof (Elf64_External_Rela); |
82058a73 MS |
1834 | else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
1835 | || h->root.type != bfd_link_hash_undefweak) | |
1836 | && (info->shared | |
1837 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
eea6121a | 1838 | htab->srelgot->size += sizeof (Elf64_External_Rela); |
0451c93c MS |
1839 | } |
1840 | else | |
1841 | h->got.offset = (bfd_vma) -1; | |
1842 | ||
1843 | eh = (struct elf_s390_link_hash_entry *) h; | |
1844 | if (eh->dyn_relocs == NULL) | |
b34976b6 | 1845 | return TRUE; |
0451c93c MS |
1846 | |
1847 | /* In the shared -Bsymbolic case, discard space allocated for | |
1848 | dynamic pc-relative relocs against symbols which turn out to be | |
1849 | defined in regular objects. For the normal shared case, discard | |
1850 | space for pc-relative relocs that have become local due to symbol | |
1851 | visibility changes. */ | |
1852 | ||
1853 | if (info->shared) | |
1854 | { | |
1c3ff0f2 | 1855 | if (SYMBOL_REFERENCES_LOCAL (info, h)) |
0451c93c MS |
1856 | { |
1857 | struct elf_s390_dyn_relocs **pp; | |
1858 | ||
1859 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1860 | { | |
1861 | p->count -= p->pc_count; | |
1862 | p->pc_count = 0; | |
1863 | if (p->count == 0) | |
1864 | *pp = p->next; | |
1865 | else | |
1866 | pp = &p->next; | |
1867 | } | |
1868 | } | |
82058a73 MS |
1869 | |
1870 | /* Also discard relocs on undefined weak syms with non-default | |
1871 | visibility. */ | |
1872 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1873 | && h->root.type == bfd_link_hash_undefweak) | |
1874 | eh->dyn_relocs = NULL; | |
0451c93c | 1875 | } |
64285810 | 1876 | else if (ELIMINATE_COPY_RELOCS) |
0451c93c MS |
1877 | { |
1878 | /* For the non-shared case, discard space for relocs against | |
1879 | symbols which turn out to need copy relocs or are not | |
1880 | dynamic. */ | |
1881 | ||
f5385ebf AM |
1882 | if (!h->non_got_ref |
1883 | && ((h->def_dynamic | |
1884 | && !h->def_regular) | |
0451c93c MS |
1885 | || (htab->elf.dynamic_sections_created |
1886 | && (h->root.type == bfd_link_hash_undefweak | |
1887 | || h->root.type == bfd_link_hash_undefined)))) | |
1888 | { | |
1889 | /* Make sure this symbol is output as a dynamic symbol. | |
1890 | Undefined weak syms won't yet be marked as dynamic. */ | |
1891 | if (h->dynindx == -1 | |
f5385ebf | 1892 | && !h->forced_local) |
0451c93c | 1893 | { |
c152c796 | 1894 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1895 | return FALSE; |
0451c93c MS |
1896 | } |
1897 | ||
1898 | /* If that succeeded, we know we'll be keeping all the | |
1899 | relocs. */ | |
1900 | if (h->dynindx != -1) | |
1901 | goto keep; | |
1902 | } | |
1903 | ||
1904 | eh->dyn_relocs = NULL; | |
1905 | ||
ec338859 | 1906 | keep: ; |
0451c93c MS |
1907 | } |
1908 | ||
1909 | /* Finally, allocate space. */ | |
1910 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1911 | { | |
1912 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
eea6121a | 1913 | sreloc->size += p->count * sizeof (Elf64_External_Rela); |
0451c93c MS |
1914 | } |
1915 | ||
b34976b6 | 1916 | return TRUE; |
0451c93c MS |
1917 | } |
1918 | ||
1919 | /* Find any dynamic relocs that apply to read-only sections. */ | |
1920 | ||
b34976b6 | 1921 | static bfd_boolean |
0451c93c MS |
1922 | readonly_dynrelocs (h, inf) |
1923 | struct elf_link_hash_entry *h; | |
1924 | PTR inf; | |
1925 | { | |
1926 | struct elf_s390_link_hash_entry *eh; | |
1927 | struct elf_s390_dyn_relocs *p; | |
1928 | ||
e92d460e AM |
1929 | if (h->root.type == bfd_link_hash_warning) |
1930 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1931 | ||
0451c93c MS |
1932 | eh = (struct elf_s390_link_hash_entry *) h; |
1933 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1934 | { | |
1935 | asection *s = p->sec->output_section; | |
1936 | ||
1937 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1938 | { | |
1939 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1940 | ||
1941 | info->flags |= DF_TEXTREL; | |
1942 | ||
1943 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 1944 | return FALSE; |
0451c93c MS |
1945 | } |
1946 | } | |
b34976b6 | 1947 | return TRUE; |
0451c93c MS |
1948 | } |
1949 | ||
a85d7ed0 NC |
1950 | /* Set the sizes of the dynamic sections. */ |
1951 | ||
b34976b6 | 1952 | static bfd_boolean |
a85d7ed0 | 1953 | elf_s390_size_dynamic_sections (output_bfd, info) |
29c2fb7c | 1954 | bfd *output_bfd ATTRIBUTE_UNUSED; |
a85d7ed0 NC |
1955 | struct bfd_link_info *info; |
1956 | { | |
0451c93c | 1957 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
1958 | bfd *dynobj; |
1959 | asection *s; | |
b34976b6 | 1960 | bfd_boolean relocs; |
0451c93c | 1961 | bfd *ibfd; |
a85d7ed0 | 1962 | |
0451c93c MS |
1963 | htab = elf_s390_hash_table (info); |
1964 | dynobj = htab->elf.dynobj; | |
1965 | if (dynobj == NULL) | |
1966 | abort (); | |
a85d7ed0 | 1967 | |
0451c93c | 1968 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
1969 | { |
1970 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 1971 | if (info->executable) |
a85d7ed0 NC |
1972 | { |
1973 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
0451c93c MS |
1974 | if (s == NULL) |
1975 | abort (); | |
eea6121a | 1976 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
a85d7ed0 NC |
1977 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1978 | } | |
1979 | } | |
a85d7ed0 | 1980 | |
0451c93c MS |
1981 | /* Set up .got offsets for local syms, and space for local dynamic |
1982 | relocs. */ | |
1983 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
a85d7ed0 | 1984 | { |
0451c93c MS |
1985 | bfd_signed_vma *local_got; |
1986 | bfd_signed_vma *end_local_got; | |
69fc87f1 | 1987 | char *local_tls_type; |
0451c93c MS |
1988 | bfd_size_type locsymcount; |
1989 | Elf_Internal_Shdr *symtab_hdr; | |
1990 | asection *srela; | |
a85d7ed0 | 1991 | |
0451c93c | 1992 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
a85d7ed0 NC |
1993 | continue; |
1994 | ||
0451c93c | 1995 | for (s = ibfd->sections; s != NULL; s = s->next) |
a85d7ed0 | 1996 | { |
ec338859 | 1997 | struct elf_s390_dyn_relocs *p; |
0451c93c | 1998 | |
ec338859 AM |
1999 | for (p = *((struct elf_s390_dyn_relocs **) |
2000 | &elf_section_data (s)->local_dynrel); | |
2001 | p != NULL; | |
2002 | p = p->next) | |
a85d7ed0 | 2003 | { |
ec338859 AM |
2004 | if (!bfd_is_abs_section (p->sec) |
2005 | && bfd_is_abs_section (p->sec->output_section)) | |
2006 | { | |
2007 | /* Input section has been discarded, either because | |
2008 | it is a copy of a linkonce section or due to | |
2009 | linker script /DISCARD/, so we'll be discarding | |
2010 | the relocs too. */ | |
2011 | } | |
248866a8 | 2012 | else if (p->count != 0) |
ec338859 AM |
2013 | { |
2014 | srela = elf_section_data (p->sec)->sreloc; | |
eea6121a | 2015 | srela->size += p->count * sizeof (Elf64_External_Rela); |
248866a8 AM |
2016 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
2017 | info->flags |= DF_TEXTREL; | |
ec338859 | 2018 | } |
a85d7ed0 NC |
2019 | } |
2020 | } | |
0451c93c MS |
2021 | |
2022 | local_got = elf_local_got_refcounts (ibfd); | |
2023 | if (!local_got) | |
2024 | continue; | |
2025 | ||
2026 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
2027 | locsymcount = symtab_hdr->sh_info; | |
2028 | end_local_got = local_got + locsymcount; | |
69fc87f1 | 2029 | local_tls_type = elf_s390_local_got_tls_type (ibfd); |
0451c93c MS |
2030 | s = htab->sgot; |
2031 | srela = htab->srelgot; | |
69fc87f1 | 2032 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) |
a85d7ed0 | 2033 | { |
0451c93c | 2034 | if (*local_got > 0) |
a85d7ed0 | 2035 | { |
eea6121a AM |
2036 | *local_got = s->size; |
2037 | s->size += GOT_ENTRY_SIZE; | |
69fc87f1 | 2038 | if (*local_tls_type == GOT_TLS_GD) |
eea6121a | 2039 | s->size += GOT_ENTRY_SIZE; |
0451c93c | 2040 | if (info->shared) |
eea6121a | 2041 | srela->size += sizeof (Elf64_External_Rela); |
a85d7ed0 NC |
2042 | } |
2043 | else | |
0451c93c | 2044 | *local_got = (bfd_vma) -1; |
a85d7ed0 | 2045 | } |
0451c93c MS |
2046 | } |
2047 | ||
69fc87f1 MS |
2048 | if (htab->tls_ldm_got.refcount > 0) |
2049 | { | |
2050 | /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64 | |
2051 | relocs. */ | |
eea6121a AM |
2052 | htab->tls_ldm_got.offset = htab->sgot->size; |
2053 | htab->sgot->size += 2 * GOT_ENTRY_SIZE; | |
2054 | htab->srelgot->size += sizeof (Elf64_External_Rela); | |
69fc87f1 MS |
2055 | } |
2056 | else | |
2057 | htab->tls_ldm_got.offset = -1; | |
2058 | ||
0451c93c MS |
2059 | /* Allocate global sym .plt and .got entries, and space for global |
2060 | sym dynamic relocs. */ | |
2061 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); | |
2062 | ||
2063 | /* We now have determined the sizes of the various dynamic sections. | |
2064 | Allocate memory for them. */ | |
b34976b6 | 2065 | relocs = FALSE; |
0451c93c MS |
2066 | for (s = dynobj->sections; s != NULL; s = s->next) |
2067 | { | |
2068 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2069 | continue; | |
2070 | ||
2071 | if (s == htab->splt | |
2072 | || s == htab->sgot | |
2073 | || s == htab->sgotplt) | |
2074 | { | |
2075 | /* Strip this section if we don't need it; see the | |
2076 | comment below. */ | |
2077 | } | |
2078 | else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0) | |
2079 | { | |
eea6121a | 2080 | if (s->size != 0 && s != htab->srelplt) |
b34976b6 | 2081 | relocs = TRUE; |
ec338859 | 2082 | |
0451c93c MS |
2083 | /* We use the reloc_count field as a counter if we need |
2084 | to copy relocs into the output file. */ | |
2085 | s->reloc_count = 0; | |
2086 | } | |
2087 | else | |
a85d7ed0 NC |
2088 | { |
2089 | /* It's not one of our sections, so don't allocate space. */ | |
2090 | continue; | |
2091 | } | |
2092 | ||
eea6121a | 2093 | if (s->size == 0) |
a85d7ed0 | 2094 | { |
0451c93c MS |
2095 | /* If we don't need this section, strip it from the |
2096 | output file. This is to handle .rela.bss and | |
2097 | .rela.plt. We must create it in | |
2098 | create_dynamic_sections, because it must be created | |
2099 | before the linker maps input sections to output | |
2100 | sections. The linker does that before | |
2101 | adjust_dynamic_symbol is called, and it is that | |
2102 | function which decides whether anything needs to go | |
2103 | into these sections. */ | |
2104 | ||
8423293d | 2105 | s->flags |= SEC_EXCLUDE; |
a85d7ed0 NC |
2106 | continue; |
2107 | } | |
2108 | ||
0451c93c MS |
2109 | /* Allocate memory for the section contents. We use bfd_zalloc |
2110 | here in case unused entries are not reclaimed before the | |
2111 | section's contents are written out. This should not happen, | |
2112 | but this way if it does, we get a R_390_NONE reloc instead | |
2113 | of garbage. */ | |
eea6121a | 2114 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
0451c93c | 2115 | if (s->contents == NULL) |
b34976b6 | 2116 | return FALSE; |
a85d7ed0 NC |
2117 | } |
2118 | ||
0451c93c | 2119 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 NC |
2120 | { |
2121 | /* Add some entries to the .dynamic section. We fill in the | |
2122 | values later, in elf_s390_finish_dynamic_sections, but we | |
2123 | must add the entries now so that we get the correct size for | |
2124 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2125 | dynamic linker and used by the debugger. */ | |
dc810e39 | 2126 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 2127 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 2128 | |
36af4a4e | 2129 | if (info->executable) |
a85d7ed0 | 2130 | { |
dc810e39 | 2131 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2132 | return FALSE; |
a85d7ed0 NC |
2133 | } |
2134 | ||
eea6121a | 2135 | if (htab->splt->size != 0) |
a85d7ed0 | 2136 | { |
dc810e39 AM |
2137 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2138 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2139 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2140 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2141 | return FALSE; |
a85d7ed0 NC |
2142 | } |
2143 | ||
2144 | if (relocs) | |
947216bf AM |
2145 | { |
2146 | if (!add_dynamic_entry (DT_RELA, 0) | |
2147 | || !add_dynamic_entry (DT_RELASZ, 0) | |
2148 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
b34976b6 | 2149 | return FALSE; |
ec338859 | 2150 | |
0451c93c MS |
2151 | /* If any dynamic relocs apply to a read-only section, |
2152 | then we need a DT_TEXTREL entry. */ | |
248866a8 AM |
2153 | if ((info->flags & DF_TEXTREL) == 0) |
2154 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
2155 | (PTR) info); | |
ec338859 | 2156 | |
0451c93c MS |
2157 | if ((info->flags & DF_TEXTREL) != 0) |
2158 | { | |
2159 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 2160 | return FALSE; |
0451c93c | 2161 | } |
a85d7ed0 NC |
2162 | } |
2163 | } | |
dc810e39 | 2164 | #undef add_dynamic_entry |
a85d7ed0 | 2165 | |
b34976b6 | 2166 | return TRUE; |
a85d7ed0 NC |
2167 | } |
2168 | ||
69fc87f1 MS |
2169 | /* Return the base VMA address which should be subtracted from real addresses |
2170 | when resolving @dtpoff relocation. | |
2171 | This is PT_TLS segment p_vaddr. */ | |
2172 | ||
2173 | static bfd_vma | |
2174 | dtpoff_base (info) | |
2175 | struct bfd_link_info *info; | |
2176 | { | |
e1918d23 AM |
2177 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2178 | if (elf_hash_table (info)->tls_sec == NULL) | |
69fc87f1 | 2179 | return 0; |
e1918d23 | 2180 | return elf_hash_table (info)->tls_sec->vma; |
69fc87f1 MS |
2181 | } |
2182 | ||
2183 | /* Return the relocation value for @tpoff relocation | |
2184 | if STT_TLS virtual address is ADDRESS. */ | |
2185 | ||
2186 | static bfd_vma | |
2187 | tpoff (info, address) | |
2188 | struct bfd_link_info *info; | |
2189 | bfd_vma address; | |
2190 | { | |
e1918d23 | 2191 | struct elf_link_hash_table *htab = elf_hash_table (info); |
69fc87f1 | 2192 | |
e1918d23 AM |
2193 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2194 | if (htab->tls_sec == NULL) | |
69fc87f1 | 2195 | return 0; |
e1918d23 | 2196 | return htab->tls_size + htab->tls_sec->vma - address; |
69fc87f1 MS |
2197 | } |
2198 | ||
2199 | /* Complain if TLS instruction relocation is against an invalid | |
2200 | instruction. */ | |
2201 | ||
2202 | static void | |
2203 | invalid_tls_insn (input_bfd, input_section, rel) | |
2204 | bfd *input_bfd; | |
2205 | asection *input_section; | |
2206 | Elf_Internal_Rela *rel; | |
2207 | { | |
2208 | reloc_howto_type *howto; | |
2209 | ||
2210 | howto = elf_howto_table + ELF64_R_TYPE (rel->r_info); | |
2211 | (*_bfd_error_handler) | |
d003868e AM |
2212 | (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"), |
2213 | input_bfd, | |
2214 | input_section, | |
69fc87f1 MS |
2215 | (long) rel->r_offset, |
2216 | howto->name); | |
2217 | } | |
2218 | ||
a85d7ed0 NC |
2219 | /* Relocate a 390 ELF section. */ |
2220 | ||
b34976b6 | 2221 | static bfd_boolean |
a85d7ed0 NC |
2222 | elf_s390_relocate_section (output_bfd, info, input_bfd, input_section, |
2223 | contents, relocs, local_syms, local_sections) | |
2224 | bfd *output_bfd; | |
2225 | struct bfd_link_info *info; | |
2226 | bfd *input_bfd; | |
2227 | asection *input_section; | |
2228 | bfd_byte *contents; | |
2229 | Elf_Internal_Rela *relocs; | |
2230 | Elf_Internal_Sym *local_syms; | |
2231 | asection **local_sections; | |
2232 | { | |
0451c93c | 2233 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
2234 | Elf_Internal_Shdr *symtab_hdr; |
2235 | struct elf_link_hash_entry **sym_hashes; | |
2236 | bfd_vma *local_got_offsets; | |
a85d7ed0 NC |
2237 | Elf_Internal_Rela *rel; |
2238 | Elf_Internal_Rela *relend; | |
2239 | ||
1049f94e | 2240 | if (info->relocatable) |
b34976b6 | 2241 | return TRUE; |
b491616a | 2242 | |
0451c93c | 2243 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
2244 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
2245 | sym_hashes = elf_sym_hashes (input_bfd); | |
2246 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
2247 | ||
a85d7ed0 NC |
2248 | rel = relocs; |
2249 | relend = relocs + input_section->reloc_count; | |
2250 | for (; rel < relend; rel++) | |
2251 | { | |
5236c819 | 2252 | unsigned int r_type; |
a85d7ed0 NC |
2253 | reloc_howto_type *howto; |
2254 | unsigned long r_symndx; | |
2255 | struct elf_link_hash_entry *h; | |
2256 | Elf_Internal_Sym *sym; | |
2257 | asection *sec; | |
0451c93c | 2258 | bfd_vma off; |
a85d7ed0 | 2259 | bfd_vma relocation; |
b34976b6 | 2260 | bfd_boolean unresolved_reloc; |
a85d7ed0 | 2261 | bfd_reloc_status_type r; |
69fc87f1 | 2262 | int tls_type; |
a85d7ed0 NC |
2263 | |
2264 | r_type = ELF64_R_TYPE (rel->r_info); | |
0451c93c | 2265 | if (r_type == (int) R_390_GNU_VTINHERIT |
947216bf AM |
2266 | || r_type == (int) R_390_GNU_VTENTRY) |
2267 | continue; | |
5236c819 | 2268 | if (r_type >= (int) R_390_max) |
a85d7ed0 NC |
2269 | { |
2270 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2271 | return FALSE; |
a85d7ed0 | 2272 | } |
a85d7ed0 | 2273 | |
b491616a | 2274 | howto = elf_howto_table + r_type; |
a85d7ed0 | 2275 | r_symndx = ELF64_R_SYM (rel->r_info); |
5236c819 MS |
2276 | |
2277 | /* This is a final link. */ | |
a85d7ed0 NC |
2278 | h = NULL; |
2279 | sym = NULL; | |
2280 | sec = NULL; | |
b34976b6 | 2281 | unresolved_reloc = FALSE; |
a85d7ed0 NC |
2282 | if (r_symndx < symtab_hdr->sh_info) |
2283 | { | |
2284 | sym = local_syms + r_symndx; | |
2285 | sec = local_sections[r_symndx]; | |
8517fae7 | 2286 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
a85d7ed0 NC |
2287 | } |
2288 | else | |
2289 | { | |
560e09e9 | 2290 | bfd_boolean warned ATTRIBUTE_UNUSED; |
0451c93c | 2291 | |
b2a8e766 AM |
2292 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2293 | r_symndx, symtab_hdr, sym_hashes, | |
2294 | h, sec, relocation, | |
2295 | unresolved_reloc, warned); | |
a85d7ed0 NC |
2296 | } |
2297 | ||
2298 | switch (r_type) | |
2299 | { | |
5236c819 MS |
2300 | case R_390_GOTPLT12: |
2301 | case R_390_GOTPLT16: | |
bd1ea41b | 2302 | case R_390_GOTPLT20: |
5236c819 MS |
2303 | case R_390_GOTPLT32: |
2304 | case R_390_GOTPLT64: | |
2305 | case R_390_GOTPLTENT: | |
2306 | /* There are three cases for a GOTPLT relocation. 1) The | |
2307 | relocation is against the jump slot entry of a plt that | |
2308 | will get emitted to the output file. 2) The relocation | |
2309 | is against the jump slot of a plt entry that has been | |
2310 | removed. elf_s390_adjust_gotplt has created a GOT entry | |
2311 | as replacement. 3) The relocation is against a local symbol. | |
2312 | Cases 2) and 3) are the same as the GOT relocation code | |
2313 | so we just have to test for case 1 and fall through for | |
2314 | the other two. */ | |
2315 | if (h != NULL && h->plt.offset != (bfd_vma) -1) | |
2316 | { | |
2317 | bfd_vma plt_index; | |
2318 | ||
2319 | /* Calc. index no. | |
2320 | Current offset - size first entry / entry size. */ | |
2321 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / | |
2322 | PLT_ENTRY_SIZE; | |
26e41594 | 2323 | |
5236c819 MS |
2324 | /* Offset in GOT is PLT index plus GOT headers(3) times 4, |
2325 | addr & GOT addr. */ | |
2326 | relocation = (plt_index + 3) * GOT_ENTRY_SIZE; | |
2327 | unresolved_reloc = FALSE; | |
2328 | ||
2329 | if (r_type == R_390_GOTPLTENT) | |
26e41594 | 2330 | relocation += htab->sgot->output_section->vma; |
5236c819 MS |
2331 | break; |
2332 | } | |
2333 | /* Fall through. */ | |
2334 | ||
947216bf AM |
2335 | case R_390_GOT12: |
2336 | case R_390_GOT16: | |
bd1ea41b | 2337 | case R_390_GOT20: |
947216bf AM |
2338 | case R_390_GOT32: |
2339 | case R_390_GOT64: | |
2340 | case R_390_GOTENT: | |
2341 | /* Relocation is to the entry for this symbol in the global | |
2342 | offset table. */ | |
0451c93c MS |
2343 | if (htab->sgot == NULL) |
2344 | abort (); | |
a85d7ed0 | 2345 | |
947216bf AM |
2346 | if (h != NULL) |
2347 | { | |
b34976b6 | 2348 | bfd_boolean dyn; |
a85d7ed0 | 2349 | |
947216bf | 2350 | off = h->got.offset; |
0451c93c | 2351 | dyn = htab->elf.dynamic_sections_created; |
4ec72bde | 2352 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
947216bf AM |
2353 | || (info->shared |
2354 | && (info->symbolic | |
0451c93c | 2355 | || h->dynindx == -1 |
f5385ebf AM |
2356 | || h->forced_local) |
2357 | && h->def_regular) | |
82058a73 MS |
2358 | || (ELF_ST_VISIBILITY (h->other) |
2359 | && h->root.type == bfd_link_hash_undefweak)) | |
947216bf AM |
2360 | { |
2361 | /* This is actually a static link, or it is a | |
2362 | -Bsymbolic link and the symbol is defined | |
2363 | locally, or the symbol was forced to be local | |
2364 | because of a version file. We must initialize | |
2365 | this entry in the global offset table. Since the | |
2366 | offset must always be a multiple of 2, we use the | |
2367 | least significant bit to record whether we have | |
2368 | initialized it already. | |
2369 | ||
2370 | When doing a dynamic link, we create a .rel.got | |
2371 | relocation entry to initialize the value. This | |
2372 | is done in the finish_dynamic_symbol routine. */ | |
2373 | if ((off & 1) != 0) | |
2374 | off &= ~1; | |
2375 | else | |
2376 | { | |
a85d7ed0 | 2377 | bfd_put_64 (output_bfd, relocation, |
0451c93c | 2378 | htab->sgot->contents + off); |
947216bf AM |
2379 | h->got.offset |= 1; |
2380 | } | |
2381 | } | |
0451c93c | 2382 | else |
b34976b6 | 2383 | unresolved_reloc = FALSE; |
947216bf AM |
2384 | } |
2385 | else | |
2386 | { | |
0451c93c MS |
2387 | if (local_got_offsets == NULL) |
2388 | abort (); | |
a85d7ed0 | 2389 | |
947216bf | 2390 | off = local_got_offsets[r_symndx]; |
a85d7ed0 | 2391 | |
947216bf AM |
2392 | /* The offset must always be a multiple of 8. We use |
2393 | the least significant bit to record whether we have | |
2394 | already generated the necessary reloc. */ | |
2395 | if ((off & 1) != 0) | |
2396 | off &= ~1; | |
2397 | else | |
2398 | { | |
2399 | bfd_put_64 (output_bfd, relocation, | |
0451c93c | 2400 | htab->sgot->contents + off); |
a85d7ed0 | 2401 | |
947216bf AM |
2402 | if (info->shared) |
2403 | { | |
2404 | asection *s; | |
2405 | Elf_Internal_Rela outrel; | |
2406 | bfd_byte *loc; | |
a85d7ed0 | 2407 | |
947216bf AM |
2408 | s = htab->srelgot; |
2409 | if (s == NULL) | |
0451c93c | 2410 | abort (); |
a85d7ed0 | 2411 | |
947216bf AM |
2412 | outrel.r_offset = (htab->sgot->output_section->vma |
2413 | + htab->sgot->output_offset | |
2414 | + off); | |
2415 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); | |
a85d7ed0 | 2416 | outrel.r_addend = relocation; |
947216bf AM |
2417 | loc = s->contents; |
2418 | loc += s->reloc_count++ * sizeof (Elf64_External_Rela); | |
2419 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2420 | } | |
a85d7ed0 | 2421 | |
947216bf AM |
2422 | local_got_offsets[r_symndx] |= 1; |
2423 | } | |
2424 | } | |
a85d7ed0 | 2425 | |
0451c93c MS |
2426 | if (off >= (bfd_vma) -2) |
2427 | abort (); | |
2428 | ||
2429 | relocation = htab->sgot->output_offset + off; | |
2430 | ||
ae9a127f NC |
2431 | /* For @GOTENT the relocation is against the offset between |
2432 | the instruction and the symbols entry in the GOT and not | |
2433 | between the start of the GOT and the symbols entry. We | |
2434 | add the vma of the GOT to get the correct value. */ | |
5236c819 MS |
2435 | if ( r_type == R_390_GOTENT |
2436 | || r_type == R_390_GOTPLTENT) | |
0451c93c | 2437 | relocation += htab->sgot->output_section->vma; |
a85d7ed0 | 2438 | |
947216bf | 2439 | break; |
99c79b2e | 2440 | |
5236c819 MS |
2441 | case R_390_GOTOFF16: |
2442 | case R_390_GOTOFF32: | |
2443 | case R_390_GOTOFF64: | |
947216bf AM |
2444 | /* Relocation is relative to the start of the global offset |
2445 | table. */ | |
a85d7ed0 | 2446 | |
947216bf AM |
2447 | /* Note that sgot->output_offset is not involved in this |
2448 | calculation. We always want the start of .got. If we | |
2449 | defined _GLOBAL_OFFSET_TABLE in a different way, as is | |
2450 | permitted by the ABI, we might have to change this | |
2451 | calculation. */ | |
2452 | relocation -= htab->sgot->output_section->vma; | |
947216bf | 2453 | break; |
a85d7ed0 | 2454 | |
947216bf | 2455 | case R_390_GOTPC: |
a85d7ed0 | 2456 | case R_390_GOTPCDBL: |
947216bf AM |
2457 | /* Use global offset table as symbol value. */ |
2458 | relocation = htab->sgot->output_section->vma; | |
b34976b6 | 2459 | unresolved_reloc = FALSE; |
947216bf | 2460 | break; |
a85d7ed0 | 2461 | |
947216bf AM |
2462 | case R_390_PLT16DBL: |
2463 | case R_390_PLT32: | |
2464 | case R_390_PLT32DBL: | |
2465 | case R_390_PLT64: | |
2466 | /* Relocation is to the entry for this symbol in the | |
2467 | procedure linkage table. */ | |
a85d7ed0 | 2468 | |
947216bf AM |
2469 | /* Resolve a PLT32 reloc against a local symbol directly, |
2470 | without using the procedure linkage table. */ | |
2471 | if (h == NULL) | |
2472 | break; | |
a85d7ed0 | 2473 | |
947216bf | 2474 | if (h->plt.offset == (bfd_vma) -1 |
0451c93c | 2475 | || htab->splt == NULL) |
947216bf AM |
2476 | { |
2477 | /* We didn't make a PLT entry for this symbol. This | |
2478 | happens when statically linking PIC code, or when | |
2479 | using -Bsymbolic. */ | |
2480 | break; | |
2481 | } | |
2482 | ||
2483 | relocation = (htab->splt->output_section->vma | |
2484 | + htab->splt->output_offset | |
2485 | + h->plt.offset); | |
b34976b6 | 2486 | unresolved_reloc = FALSE; |
26e41594 | 2487 | break; |
5236c819 MS |
2488 | |
2489 | case R_390_PLTOFF16: | |
2490 | case R_390_PLTOFF32: | |
2491 | case R_390_PLTOFF64: | |
26e41594 AM |
2492 | /* Relocation is to the entry for this symbol in the |
2493 | procedure linkage table relative to the start of the GOT. */ | |
5236c819 MS |
2494 | |
2495 | /* For local symbols or if we didn't make a PLT entry for | |
2496 | this symbol resolve the symbol directly. */ | |
26e41594 | 2497 | if ( h == NULL |
5236c819 MS |
2498 | || h->plt.offset == (bfd_vma) -1 |
2499 | || htab->splt == NULL) | |
2500 | { | |
2501 | relocation -= htab->sgot->output_section->vma; | |
2502 | break; | |
2503 | } | |
2504 | ||
26e41594 AM |
2505 | relocation = (htab->splt->output_section->vma |
2506 | + htab->splt->output_offset | |
2507 | + h->plt.offset | |
5236c819 MS |
2508 | - htab->sgot->output_section->vma); |
2509 | unresolved_reloc = FALSE; | |
947216bf AM |
2510 | break; |
2511 | ||
2512 | case R_390_8: | |
2513 | case R_390_16: | |
2514 | case R_390_32: | |
2515 | case R_390_64: | |
2516 | case R_390_PC16: | |
2517 | case R_390_PC16DBL: | |
2518 | case R_390_PC32: | |
a85d7ed0 | 2519 | case R_390_PC32DBL: |
947216bf | 2520 | case R_390_PC64: |
ec338859 AM |
2521 | /* r_symndx will be zero only for relocs against symbols |
2522 | from removed linkonce sections, or sections discarded by | |
2523 | a linker script. */ | |
947216bf AM |
2524 | if (r_symndx == 0 |
2525 | || (input_section->flags & SEC_ALLOC) == 0) | |
ec338859 AM |
2526 | break; |
2527 | ||
947216bf | 2528 | if ((info->shared |
82058a73 MS |
2529 | && (h == NULL |
2530 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2531 | || h->root.type != bfd_link_hash_undefweak) | |
0451c93c MS |
2532 | && ((r_type != R_390_PC16 |
2533 | && r_type != R_390_PC16DBL | |
2534 | && r_type != R_390_PC32 | |
2535 | && r_type != R_390_PC32DBL | |
2536 | && r_type != R_390_PC64) | |
2537 | || (h != NULL | |
1c3ff0f2 | 2538 | && !SYMBOL_REFERENCES_LOCAL (info, h)))) |
64285810 MS |
2539 | || (ELIMINATE_COPY_RELOCS |
2540 | && !info->shared | |
0451c93c MS |
2541 | && h != NULL |
2542 | && h->dynindx != -1 | |
f5385ebf AM |
2543 | && !h->non_got_ref |
2544 | && ((h->def_dynamic | |
2545 | && !h->def_regular) | |
0451c93c MS |
2546 | || h->root.type == bfd_link_hash_undefweak |
2547 | || h->root.type == bfd_link_hash_undefined))) | |
947216bf AM |
2548 | { |
2549 | Elf_Internal_Rela outrel; | |
b34976b6 | 2550 | bfd_boolean skip, relocate; |
0451c93c | 2551 | asection *sreloc; |
947216bf | 2552 | bfd_byte *loc; |
a85d7ed0 | 2553 | |
947216bf AM |
2554 | /* When generating a shared object, these relocations |
2555 | are copied into the output file to be resolved at run | |
2556 | time. */ | |
b34976b6 AM |
2557 | skip = FALSE; |
2558 | relocate = FALSE; | |
a85d7ed0 | 2559 | |
c629eae0 JJ |
2560 | outrel.r_offset = |
2561 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2562 | rel->r_offset); | |
2563 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 2564 | skip = TRUE; |
0bb2d96a | 2565 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2566 | skip = TRUE, relocate = TRUE; |
a85d7ed0 | 2567 | |
947216bf AM |
2568 | outrel.r_offset += (input_section->output_section->vma |
2569 | + input_section->output_offset); | |
a85d7ed0 | 2570 | |
947216bf | 2571 | if (skip) |
0bb2d96a | 2572 | memset (&outrel, 0, sizeof outrel); |
947216bf | 2573 | else if (h != NULL |
0451c93c MS |
2574 | && h->dynindx != -1 |
2575 | && (r_type == R_390_PC16 | |
2576 | || r_type == R_390_PC16DBL | |
2577 | || r_type == R_390_PC32 | |
2578 | || r_type == R_390_PC32DBL | |
2579 | || r_type == R_390_PC64 | |
2580 | || !info->shared | |
2581 | || !info->symbolic | |
f5385ebf | 2582 | || !h->def_regular)) |
947216bf AM |
2583 | { |
2584 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); | |
27018c3f | 2585 | outrel.r_addend = rel->r_addend; |
947216bf AM |
2586 | } |
2587 | else | |
2588 | { | |
0451c93c | 2589 | /* This symbol is local, or marked to become local. */ |
90ced0dd | 2590 | outrel.r_addend = relocation + rel->r_addend; |
b5727d75 MS |
2591 | if (r_type == R_390_64) |
2592 | { | |
2593 | relocate = TRUE; | |
2594 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); | |
b5727d75 MS |
2595 | } |
2596 | else | |
2597 | { | |
2598 | long sindx; | |
2599 | ||
90ced0dd | 2600 | if (bfd_is_abs_section (sec)) |
b5727d75 MS |
2601 | sindx = 0; |
2602 | else if (sec == NULL || sec->owner == NULL) | |
2603 | { | |
2604 | bfd_set_error(bfd_error_bad_value); | |
2605 | return FALSE; | |
2606 | } | |
2607 | else | |
2608 | { | |
2609 | asection *osec; | |
2610 | ||
2611 | osec = sec->output_section; | |
2612 | sindx = elf_section_data (osec)->dynindx; | |
2613 | BFD_ASSERT (sindx > 0); | |
90ced0dd MS |
2614 | |
2615 | /* We are turning this relocation into one | |
2616 | against a section symbol, so subtract out | |
2617 | the output section's address but not the | |
2618 | offset of the input section in the output | |
2619 | section. */ | |
2620 | ||
2621 | outrel.r_addend -= osec->vma; | |
b5727d75 MS |
2622 | } |
2623 | outrel.r_info = ELF64_R_INFO (sindx, r_type); | |
b5727d75 | 2624 | } |
0451c93c | 2625 | } |
a85d7ed0 | 2626 | |
0451c93c MS |
2627 | sreloc = elf_section_data (input_section)->sreloc; |
2628 | if (sreloc == NULL) | |
2629 | abort (); | |
2630 | ||
947216bf AM |
2631 | loc = sreloc->contents; |
2632 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2633 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
a85d7ed0 | 2634 | |
947216bf AM |
2635 | /* If this reloc is against an external symbol, we do |
2636 | not want to fiddle with the addend. Otherwise, we | |
2637 | need to include the symbol value so that it becomes | |
2638 | an addend for the dynamic reloc. */ | |
2639 | if (! relocate) | |
2640 | continue; | |
2641 | } | |
a85d7ed0 | 2642 | |
947216bf | 2643 | break; |
a85d7ed0 | 2644 | |
69fc87f1 MS |
2645 | /* Relocations for tls literal pool entries. */ |
2646 | case R_390_TLS_IE64: | |
2647 | if (info->shared) | |
2648 | { | |
2649 | Elf_Internal_Rela outrel; | |
2650 | asection *sreloc; | |
2651 | bfd_byte *loc; | |
2652 | ||
2653 | outrel.r_offset = rel->r_offset | |
2654 | + input_section->output_section->vma | |
2655 | + input_section->output_offset; | |
2656 | outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE); | |
2657 | sreloc = elf_section_data (input_section)->sreloc; | |
2658 | if (sreloc == NULL) | |
2659 | abort (); | |
2660 | loc = sreloc->contents; | |
2661 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2662 | bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc); | |
2663 | } | |
ae9a127f | 2664 | /* Fall through. */ |
69fc87f1 MS |
2665 | |
2666 | case R_390_TLS_GD64: | |
2667 | case R_390_TLS_GOTIE64: | |
2668 | r_type = elf_s390_tls_transition (info, r_type, h == NULL); | |
2669 | tls_type = GOT_UNKNOWN; | |
2670 | if (h == NULL && local_got_offsets) | |
2671 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2672 | else if (h != NULL) | |
2673 | { | |
2674 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2675 | if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE) | |
2676 | r_type = R_390_TLS_LE64; | |
2677 | } | |
2678 | if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE) | |
2679 | r_type = R_390_TLS_IE64; | |
2680 | ||
2681 | if (r_type == R_390_TLS_LE64) | |
2682 | { | |
2683 | /* This relocation gets optimized away by the local exec | |
2684 | access optimization. */ | |
2685 | BFD_ASSERT (! unresolved_reloc); | |
2686 | bfd_put_64 (output_bfd, -tpoff (info, relocation), | |
2687 | contents + rel->r_offset); | |
2688 | continue; | |
2689 | } | |
2690 | ||
2691 | if (htab->sgot == NULL) | |
2692 | abort (); | |
2693 | ||
2694 | if (h != NULL) | |
2695 | off = h->got.offset; | |
2696 | else | |
2697 | { | |
2698 | if (local_got_offsets == NULL) | |
2699 | abort (); | |
2700 | ||
2701 | off = local_got_offsets[r_symndx]; | |
2702 | } | |
2703 | ||
2704 | emit_tls_relocs: | |
2705 | ||
2706 | if ((off & 1) != 0) | |
2707 | off &= ~1; | |
26e41594 | 2708 | else |
69fc87f1 MS |
2709 | { |
2710 | Elf_Internal_Rela outrel; | |
2711 | bfd_byte *loc; | |
2712 | int dr_type, indx; | |
2713 | ||
2714 | if (htab->srelgot == NULL) | |
2715 | abort (); | |
2716 | ||
2717 | outrel.r_offset = (htab->sgot->output_section->vma | |
2718 | + htab->sgot->output_offset + off); | |
2719 | ||
2720 | indx = h && h->dynindx != -1 ? h->dynindx : 0; | |
2721 | if (r_type == R_390_TLS_GD64) | |
2722 | dr_type = R_390_TLS_DTPMOD; | |
2723 | else | |
2724 | dr_type = R_390_TLS_TPOFF; | |
2725 | if (dr_type == R_390_TLS_TPOFF && indx == 0) | |
2726 | outrel.r_addend = relocation - dtpoff_base (info); | |
2727 | else | |
2728 | outrel.r_addend = 0; | |
2729 | outrel.r_info = ELF64_R_INFO (indx, dr_type); | |
2730 | loc = htab->srelgot->contents; | |
2731 | loc += htab->srelgot->reloc_count++ | |
2732 | * sizeof (Elf64_External_Rela); | |
2733 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2734 | ||
2735 | if (r_type == R_390_TLS_GD64) | |
2736 | { | |
2737 | if (indx == 0) | |
2738 | { | |
2739 | BFD_ASSERT (! unresolved_reloc); | |
2740 | bfd_put_64 (output_bfd, | |
2741 | relocation - dtpoff_base (info), | |
2742 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2743 | } | |
2744 | else | |
2745 | { | |
2746 | outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF); | |
2747 | outrel.r_offset += GOT_ENTRY_SIZE; | |
2748 | outrel.r_addend = 0; | |
2749 | htab->srelgot->reloc_count++; | |
2750 | loc += sizeof (Elf64_External_Rela); | |
2751 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2752 | } | |
2753 | } | |
2754 | ||
2755 | if (h != NULL) | |
2756 | h->got.offset |= 1; | |
2757 | else | |
2758 | local_got_offsets[r_symndx] |= 1; | |
2759 | } | |
2760 | ||
2761 | if (off >= (bfd_vma) -2) | |
2762 | abort (); | |
2763 | if (r_type == ELF64_R_TYPE (rel->r_info)) | |
2764 | { | |
2765 | relocation = htab->sgot->output_offset + off; | |
2766 | if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT) | |
2767 | relocation += htab->sgot->output_section->vma; | |
2768 | unresolved_reloc = FALSE; | |
2769 | } | |
2770 | else | |
2771 | { | |
2772 | bfd_put_64 (output_bfd, htab->sgot->output_offset + off, | |
2773 | contents + rel->r_offset); | |
2774 | continue; | |
2775 | } | |
2776 | break; | |
2777 | ||
2778 | case R_390_TLS_GOTIE12: | |
bd1ea41b | 2779 | case R_390_TLS_GOTIE20: |
69fc87f1 MS |
2780 | case R_390_TLS_IEENT: |
2781 | if (h == NULL) | |
2782 | { | |
2783 | if (local_got_offsets == NULL) | |
2784 | abort(); | |
2785 | off = local_got_offsets[r_symndx]; | |
2786 | if (info->shared) | |
2787 | goto emit_tls_relocs; | |
2788 | } | |
2789 | else | |
2790 | { | |
2791 | off = h->got.offset; | |
2792 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2793 | if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE) | |
2794 | goto emit_tls_relocs; | |
2795 | } | |
2796 | ||
2797 | if (htab->sgot == NULL) | |
2798 | abort (); | |
2799 | ||
2800 | BFD_ASSERT (! unresolved_reloc); | |
2801 | bfd_put_64 (output_bfd, -tpoff (info, relocation), | |
2802 | htab->sgot->contents + off); | |
2803 | relocation = htab->sgot->output_offset + off; | |
2804 | if (r_type == R_390_TLS_IEENT) | |
2805 | relocation += htab->sgot->output_section->vma; | |
2806 | unresolved_reloc = FALSE; | |
2807 | break; | |
2808 | ||
2809 | case R_390_TLS_LDM64: | |
2810 | if (! info->shared) | |
2811 | /* The literal pool entry this relocation refers to gets ignored | |
2812 | by the optimized code of the local exec model. Do nothing | |
2813 | and the value will turn out zero. */ | |
2814 | continue; | |
2815 | ||
2816 | if (htab->sgot == NULL) | |
2817 | abort (); | |
2818 | ||
2819 | off = htab->tls_ldm_got.offset; | |
2820 | if (off & 1) | |
2821 | off &= ~1; | |
2822 | else | |
2823 | { | |
2824 | Elf_Internal_Rela outrel; | |
2825 | bfd_byte *loc; | |
2826 | ||
2827 | if (htab->srelgot == NULL) | |
2828 | abort (); | |
2829 | ||
2830 | outrel.r_offset = (htab->sgot->output_section->vma | |
2831 | + htab->sgot->output_offset + off); | |
2832 | ||
2833 | bfd_put_64 (output_bfd, 0, | |
2834 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2835 | outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD); | |
2836 | outrel.r_addend = 0; | |
2837 | loc = htab->srelgot->contents; | |
2838 | loc += htab->srelgot->reloc_count++ | |
2839 | * sizeof (Elf64_External_Rela); | |
2840 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2841 | htab->tls_ldm_got.offset |= 1; | |
2842 | } | |
2843 | relocation = htab->sgot->output_offset + off; | |
26e41594 | 2844 | unresolved_reloc = FALSE; |
69fc87f1 MS |
2845 | break; |
2846 | ||
2847 | case R_390_TLS_LE64: | |
2848 | if (info->shared) | |
2849 | { | |
2850 | /* Linking a shared library with non-fpic code requires | |
2851 | a R_390_TLS_TPOFF relocation. */ | |
2852 | Elf_Internal_Rela outrel; | |
2853 | asection *sreloc; | |
2854 | bfd_byte *loc; | |
2855 | int indx; | |
2856 | ||
2857 | outrel.r_offset = rel->r_offset | |
2858 | + input_section->output_section->vma | |
2859 | + input_section->output_offset; | |
2860 | if (h != NULL && h->dynindx != -1) | |
2861 | indx = h->dynindx; | |
2862 | else | |
2863 | indx = 0; | |
2864 | outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF); | |
2865 | if (indx == 0) | |
2866 | outrel.r_addend = relocation - dtpoff_base (info); | |
2867 | else | |
2868 | outrel.r_addend = 0; | |
2869 | sreloc = elf_section_data (input_section)->sreloc; | |
2870 | if (sreloc == NULL) | |
2871 | abort (); | |
2872 | loc = sreloc->contents; | |
2873 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2874 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2875 | } | |
2876 | else | |
2877 | { | |
2878 | BFD_ASSERT (! unresolved_reloc); | |
2879 | bfd_put_64 (output_bfd, -tpoff (info, relocation), | |
2880 | contents + rel->r_offset); | |
2881 | } | |
2882 | continue; | |
2883 | ||
2884 | case R_390_TLS_LDO64: | |
2885 | if (info->shared || (input_section->flags & SEC_CODE) == 0) | |
2886 | relocation -= dtpoff_base (info); | |
2887 | else | |
2888 | /* When converting LDO to LE, we must negate. */ | |
2889 | relocation = -tpoff (info, relocation); | |
2890 | break; | |
2891 | ||
2892 | /* Relocations for tls instructions. */ | |
2893 | case R_390_TLS_LOAD: | |
2894 | case R_390_TLS_GDCALL: | |
2895 | case R_390_TLS_LDCALL: | |
2896 | tls_type = GOT_UNKNOWN; | |
2897 | if (h == NULL && local_got_offsets) | |
2898 | tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx]; | |
2899 | else if (h != NULL) | |
2900 | tls_type = elf_s390_hash_entry(h)->tls_type; | |
2901 | ||
2902 | if (tls_type == GOT_TLS_GD) | |
2903 | continue; | |
2904 | ||
2905 | if (r_type == R_390_TLS_LOAD) | |
2906 | { | |
2907 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2908 | { | |
2909 | /* IE->LE transition. Four valid cases: | |
2910 | lg %rx,(0,%ry) -> sllg %rx,%ry,0 | |
2911 | lg %rx,(%ry,0) -> sllg %rx,%ry,0 | |
2912 | lg %rx,(%ry,%r12) -> sllg %rx,%ry,0 | |
2913 | lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */ | |
2914 | unsigned int insn0, insn1, ry; | |
2915 | ||
2916 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2917 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); | |
2918 | if (insn1 != 0x0004) | |
2919 | invalid_tls_insn (input_bfd, input_section, rel); | |
2920 | ry = 0; | |
2921 | if ((insn0 & 0xff00f000) == 0xe3000000) | |
2922 | /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */ | |
2923 | ry = (insn0 & 0x000f0000); | |
2924 | else if ((insn0 & 0xff0f0000) == 0xe3000000) | |
2925 | /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */ | |
2926 | ry = (insn0 & 0x0000f000) << 4; | |
2927 | else if ((insn0 & 0xff00f000) == 0xe300c000) | |
2928 | /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */ | |
2929 | ry = (insn0 & 0x000f0000); | |
2930 | else if ((insn0 & 0xff0f0000) == 0xe30c0000) | |
2931 | /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */ | |
2932 | ry = (insn0 & 0x0000f000) << 4; | |
2933 | else | |
2934 | invalid_tls_insn (input_bfd, input_section, rel); | |
2935 | insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry; | |
2936 | insn1 = 0x000d; | |
2937 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); | |
2938 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); | |
2939 | } | |
2940 | } | |
2941 | else if (r_type == R_390_TLS_GDCALL) | |
2942 | { | |
2943 | unsigned int insn0, insn1; | |
2944 | ||
2945 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2946 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); | |
2947 | if ((insn0 & 0xffff0000) != 0xc0e50000) | |
2948 | invalid_tls_insn (input_bfd, input_section, rel); | |
2949 | if (!info->shared && (h == NULL || h->dynindx == -1)) | |
2950 | { | |
2951 | /* GD->LE transition. | |
2952 | brasl %r14,__tls_get_addr@plt -> brcl 0,. */ | |
2953 | insn0 = 0xc0040000; | |
2954 | insn1 = 0x0000; | |
2955 | } | |
2956 | else | |
2957 | { | |
2958 | /* GD->IE transition. | |
2959 | brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */ | |
2960 | insn0 = 0xe322c000; | |
2961 | insn1 = 0x0004; | |
2962 | } | |
2963 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); | |
2964 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); | |
2965 | } | |
2966 | else if (r_type == R_390_TLS_LDCALL) | |
2967 | { | |
2968 | if (!info->shared) | |
2969 | { | |
2970 | unsigned int insn0, insn1; | |
2971 | ||
2972 | insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2973 | insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4); | |
2974 | if ((insn0 & 0xffff0000) != 0xc0e50000) | |
2975 | invalid_tls_insn (input_bfd, input_section, rel); | |
2976 | /* LD->LE transition. | |
2977 | brasl %r14,__tls_get_addr@plt -> brcl 0,. */ | |
2978 | insn0 = 0xc0040000; | |
2979 | insn1 = 0x0000; | |
2980 | bfd_put_32 (output_bfd, insn0, contents + rel->r_offset); | |
2981 | bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4); | |
2982 | } | |
2983 | } | |
2984 | continue; | |
2985 | ||
947216bf AM |
2986 | default: |
2987 | break; | |
2988 | } | |
a85d7ed0 | 2989 | |
239e1f3a AM |
2990 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
2991 | because such sections are not SEC_ALLOC and thus ld.so will | |
2992 | not process them. */ | |
0451c93c | 2993 | if (unresolved_reloc |
239e1f3a | 2994 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
f5385ebf | 2995 | && h->def_dynamic)) |
0451c93c | 2996 | (*_bfd_error_handler) |
d003868e AM |
2997 | (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"), |
2998 | input_bfd, | |
2999 | input_section, | |
0451c93c MS |
3000 | (long) rel->r_offset, |
3001 | h->root.root.string); | |
3002 | ||
bd1ea41b MS |
3003 | if (r_type == R_390_20 |
3004 | || r_type == R_390_GOT20 | |
3005 | || r_type == R_390_GOTPLT20 | |
3006 | || r_type == R_390_TLS_GOTIE20) | |
3007 | { | |
3008 | relocation += rel->r_addend; | |
3009 | relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12; | |
3010 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
3011 | contents, rel->r_offset, | |
3012 | relocation, 0); | |
3013 | } | |
3014 | else | |
3015 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, | |
a85d7ed0 NC |
3016 | contents, rel->r_offset, |
3017 | relocation, rel->r_addend); | |
3018 | ||
3019 | if (r != bfd_reloc_ok) | |
3020 | { | |
0451c93c | 3021 | const char *name; |
ec338859 | 3022 | |
0451c93c MS |
3023 | if (h != NULL) |
3024 | name = h->root.root.string; | |
3025 | else | |
a85d7ed0 | 3026 | { |
0451c93c MS |
3027 | name = bfd_elf_string_from_elf_section (input_bfd, |
3028 | symtab_hdr->sh_link, | |
3029 | sym->st_name); | |
3030 | if (name == NULL) | |
b34976b6 | 3031 | return FALSE; |
0451c93c MS |
3032 | if (*name == '\0') |
3033 | name = bfd_section_name (input_bfd, sec); | |
3034 | } | |
ec338859 | 3035 | |
0451c93c MS |
3036 | if (r == bfd_reloc_overflow) |
3037 | { | |
ec338859 | 3038 | |
0451c93c | 3039 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
3040 | (info, (h ? &h->root : NULL), name, howto->name, |
3041 | (bfd_vma) 0, input_bfd, input_section, | |
3042 | rel->r_offset))) | |
b34976b6 | 3043 | return FALSE; |
0451c93c MS |
3044 | } |
3045 | else | |
3046 | { | |
3047 | (*_bfd_error_handler) | |
d003868e AM |
3048 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
3049 | input_bfd, input_section, | |
0451c93c | 3050 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 3051 | return FALSE; |
a85d7ed0 NC |
3052 | } |
3053 | } | |
3054 | } | |
3055 | ||
b34976b6 | 3056 | return TRUE; |
a85d7ed0 NC |
3057 | } |
3058 | ||
3059 | /* Finish up dynamic symbol handling. We set the contents of various | |
3060 | dynamic sections here. */ | |
3061 | ||
b34976b6 | 3062 | static bfd_boolean |
a85d7ed0 NC |
3063 | elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym) |
3064 | bfd *output_bfd; | |
3065 | struct bfd_link_info *info; | |
3066 | struct elf_link_hash_entry *h; | |
3067 | Elf_Internal_Sym *sym; | |
3068 | { | |
0451c93c | 3069 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 | 3070 | |
0451c93c | 3071 | htab = elf_s390_hash_table (info); |
a85d7ed0 NC |
3072 | |
3073 | if (h->plt.offset != (bfd_vma) -1) | |
3074 | { | |
a85d7ed0 | 3075 | bfd_vma plt_index; |
0451c93c MS |
3076 | bfd_vma got_offset; |
3077 | Elf_Internal_Rela rela; | |
947216bf | 3078 | bfd_byte *loc; |
a85d7ed0 NC |
3079 | |
3080 | /* This symbol has an entry in the procedure linkage table. Set | |
947216bf | 3081 | it up. */ |
a85d7ed0 | 3082 | |
0451c93c MS |
3083 | if (h->dynindx == -1 |
3084 | || htab->splt == NULL | |
3085 | || htab->sgotplt == NULL | |
3086 | || htab->srelplt == NULL) | |
3087 | abort (); | |
a85d7ed0 | 3088 | |
99c79b2e | 3089 | /* Calc. index no. |
947216bf | 3090 | Current offset - size first entry / entry size. */ |
a85d7ed0 NC |
3091 | plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE; |
3092 | ||
3093 | /* Offset in GOT is PLT index plus GOT headers(3) times 8, | |
947216bf | 3094 | addr & GOT addr. */ |
a85d7ed0 NC |
3095 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
3096 | ||
3097 | /* Fill in the blueprint of a PLT. */ | |
0451c93c MS |
3098 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0, |
3099 | htab->splt->contents + h->plt.offset); | |
3100 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1, | |
3101 | htab->splt->contents + h->plt.offset + 4); | |
3102 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2, | |
3103 | htab->splt->contents + h->plt.offset + 8); | |
3104 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3, | |
3105 | htab->splt->contents + h->plt.offset + 12); | |
3106 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4, | |
3107 | htab->splt->contents + h->plt.offset + 16); | |
3108 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5, | |
3109 | htab->splt->contents + h->plt.offset + 20); | |
3110 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6, | |
3111 | htab->splt->contents + h->plt.offset + 24); | |
3112 | bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7, | |
3113 | htab->splt->contents + h->plt.offset + 28); | |
a85d7ed0 NC |
3114 | /* Fixup the relative address to the GOT entry */ |
3115 | bfd_put_32 (output_bfd, | |
0451c93c MS |
3116 | (htab->sgotplt->output_section->vma + |
3117 | htab->sgotplt->output_offset + got_offset | |
3118 | - (htab->splt->output_section->vma + h->plt.offset))/2, | |
3119 | htab->splt->contents + h->plt.offset + 2); | |
a85d7ed0 NC |
3120 | /* Fixup the relative branch to PLT 0 */ |
3121 | bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE + | |
3122 | (PLT_ENTRY_SIZE * plt_index) + 22)/2, | |
0451c93c | 3123 | htab->splt->contents + h->plt.offset + 24); |
a85d7ed0 NC |
3124 | /* Fixup offset into symbol table */ |
3125 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela), | |
0451c93c | 3126 | htab->splt->contents + h->plt.offset + 28); |
a85d7ed0 NC |
3127 | |
3128 | /* Fill in the entry in the global offset table. | |
947216bf | 3129 | Points to instruction after GOT offset. */ |
a85d7ed0 | 3130 | bfd_put_64 (output_bfd, |
0451c93c MS |
3131 | (htab->splt->output_section->vma |
3132 | + htab->splt->output_offset | |
a85d7ed0 NC |
3133 | + h->plt.offset |
3134 | + 14), | |
0451c93c | 3135 | htab->sgotplt->contents + got_offset); |
a85d7ed0 | 3136 | |
0451c93c MS |
3137 | /* Fill in the entry in the .rela.plt section. */ |
3138 | rela.r_offset = (htab->sgotplt->output_section->vma | |
3139 | + htab->sgotplt->output_offset | |
3140 | + got_offset); | |
3141 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT); | |
3142 | rela.r_addend = 0; | |
947216bf | 3143 | loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela); |
0451c93c | 3144 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 | 3145 | |
f5385ebf | 3146 | if (!h->def_regular) |
a85d7ed0 NC |
3147 | { |
3148 | /* Mark the symbol as undefined, rather than as defined in | |
0451c93c MS |
3149 | the .plt section. Leave the value alone. This is a clue |
3150 | for the dynamic linker, to make function pointer | |
3151 | comparisons work between an application and shared | |
3152 | library. */ | |
a85d7ed0 NC |
3153 | sym->st_shndx = SHN_UNDEF; |
3154 | } | |
3155 | } | |
3156 | ||
69fc87f1 MS |
3157 | if (h->got.offset != (bfd_vma) -1 |
3158 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD | |
3159 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE | |
3160 | && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT) | |
a85d7ed0 | 3161 | { |
a85d7ed0 | 3162 | Elf_Internal_Rela rela; |
947216bf | 3163 | bfd_byte *loc; |
a85d7ed0 NC |
3164 | |
3165 | /* This symbol has an entry in the global offset table. Set it | |
947216bf | 3166 | up. */ |
0451c93c MS |
3167 | if (htab->sgot == NULL || htab->srelgot == NULL) |
3168 | abort (); | |
a85d7ed0 | 3169 | |
0451c93c MS |
3170 | rela.r_offset = (htab->sgot->output_section->vma |
3171 | + htab->sgot->output_offset | |
dc810e39 | 3172 | + (h->got.offset &~ (bfd_vma) 1)); |
a85d7ed0 NC |
3173 | |
3174 | /* If this is a static link, or it is a -Bsymbolic link and the | |
3175 | symbol is defined locally or was forced to be local because | |
3176 | of a version file, we just want to emit a RELATIVE reloc. | |
3177 | The entry in the global offset table will already have been | |
3178 | initialized in the relocate_section function. */ | |
0451c93c MS |
3179 | if (info->shared |
3180 | && (info->symbolic | |
3181 | || h->dynindx == -1 | |
f5385ebf AM |
3182 | || h->forced_local) |
3183 | && h->def_regular) | |
947216bf | 3184 | { |
0451c93c | 3185 | BFD_ASSERT((h->got.offset & 1) != 0); |
947216bf AM |
3186 | rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE); |
3187 | rela.r_addend = (h->root.u.def.value | |
3188 | + h->root.u.def.section->output_section->vma | |
3189 | + h->root.u.def.section->output_offset); | |
3190 | } | |
a85d7ed0 NC |
3191 | else |
3192 | { | |
3193 | BFD_ASSERT((h->got.offset & 1) == 0); | |
0451c93c | 3194 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset); |
a85d7ed0 | 3195 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT); |
947216bf AM |
3196 | rela.r_addend = 0; |
3197 | } | |
a85d7ed0 | 3198 | |
947216bf AM |
3199 | loc = htab->srelgot->contents; |
3200 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
0451c93c | 3201 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3202 | } |
3203 | ||
f5385ebf | 3204 | if (h->needs_copy) |
a85d7ed0 | 3205 | { |
a85d7ed0 | 3206 | Elf_Internal_Rela rela; |
947216bf | 3207 | bfd_byte *loc; |
a85d7ed0 NC |
3208 | |
3209 | /* This symbols needs a copy reloc. Set it up. */ | |
3210 | ||
0451c93c MS |
3211 | if (h->dynindx == -1 |
3212 | || (h->root.type != bfd_link_hash_defined | |
3213 | && h->root.type != bfd_link_hash_defweak) | |
3214 | || htab->srelbss == NULL) | |
3215 | abort (); | |
a85d7ed0 NC |
3216 | |
3217 | rela.r_offset = (h->root.u.def.value | |
3218 | + h->root.u.def.section->output_section->vma | |
3219 | + h->root.u.def.section->output_offset); | |
3220 | rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY); | |
3221 | rela.r_addend = 0; | |
947216bf AM |
3222 | loc = htab->srelbss->contents; |
3223 | loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); | |
0451c93c | 3224 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
a85d7ed0 NC |
3225 | } |
3226 | ||
3227 | /* Mark some specially defined symbols as absolute. */ | |
3228 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
3229 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0 | |
3230 | || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0) | |
3231 | sym->st_shndx = SHN_ABS; | |
3232 | ||
b34976b6 | 3233 | return TRUE; |
a85d7ed0 NC |
3234 | } |
3235 | ||
0451c93c MS |
3236 | /* Used to decide how to sort relocs in an optimal manner for the |
3237 | dynamic linker, before writing them out. */ | |
3238 | ||
3239 | static enum elf_reloc_type_class | |
3240 | elf_s390_reloc_type_class (rela) | |
3241 | const Elf_Internal_Rela *rela; | |
3242 | { | |
3243 | switch ((int) ELF64_R_TYPE (rela->r_info)) | |
3244 | { | |
3245 | case R_390_RELATIVE: | |
3246 | return reloc_class_relative; | |
3247 | case R_390_JMP_SLOT: | |
3248 | return reloc_class_plt; | |
3249 | case R_390_COPY: | |
3250 | return reloc_class_copy; | |
3251 | default: | |
3252 | return reloc_class_normal; | |
3253 | } | |
3254 | } | |
3255 | ||
a85d7ed0 NC |
3256 | /* Finish up the dynamic sections. */ |
3257 | ||
b34976b6 | 3258 | static bfd_boolean |
a85d7ed0 NC |
3259 | elf_s390_finish_dynamic_sections (output_bfd, info) |
3260 | bfd *output_bfd; | |
3261 | struct bfd_link_info *info; | |
3262 | { | |
0451c93c | 3263 | struct elf_s390_link_hash_table *htab; |
a85d7ed0 NC |
3264 | bfd *dynobj; |
3265 | asection *sdyn; | |
a85d7ed0 | 3266 | |
0451c93c MS |
3267 | htab = elf_s390_hash_table (info); |
3268 | dynobj = htab->elf.dynobj; | |
a85d7ed0 NC |
3269 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
3270 | ||
0451c93c | 3271 | if (htab->elf.dynamic_sections_created) |
a85d7ed0 | 3272 | { |
a85d7ed0 NC |
3273 | Elf64_External_Dyn *dyncon, *dynconend; |
3274 | ||
0451c93c MS |
3275 | if (sdyn == NULL || htab->sgot == NULL) |
3276 | abort (); | |
a85d7ed0 NC |
3277 | |
3278 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
eea6121a | 3279 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); |
a85d7ed0 NC |
3280 | for (; dyncon < dynconend; dyncon++) |
3281 | { | |
3282 | Elf_Internal_Dyn dyn; | |
a85d7ed0 | 3283 | asection *s; |
ec338859 | 3284 | |
a85d7ed0 | 3285 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); |
ec338859 | 3286 | |
a85d7ed0 NC |
3287 | switch (dyn.d_tag) |
3288 | { | |
3289 | default: | |
0451c93c | 3290 | continue; |
ec338859 | 3291 | |
a85d7ed0 | 3292 | case DT_PLTGOT: |
0451c93c MS |
3293 | dyn.d_un.d_ptr = htab->sgot->output_section->vma; |
3294 | break; | |
ec338859 | 3295 | |
a85d7ed0 | 3296 | case DT_JMPREL: |
0451c93c | 3297 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
a85d7ed0 | 3298 | break; |
ec338859 | 3299 | |
a85d7ed0 | 3300 | case DT_PLTRELSZ: |
0451c93c | 3301 | s = htab->srelplt->output_section; |
eea6121a | 3302 | dyn.d_un.d_val = s->size; |
a85d7ed0 | 3303 | break; |
ec338859 | 3304 | |
a85d7ed0 NC |
3305 | case DT_RELASZ: |
3306 | /* The procedure linkage table relocs (DT_JMPREL) should | |
3307 | not be included in the overall relocs (DT_RELA). | |
3308 | Therefore, we override the DT_RELASZ entry here to | |
3309 | make it not include the JMPREL relocs. Since the | |
3310 | linker script arranges for .rela.plt to follow all | |
3311 | other relocation sections, we don't have to worry | |
3312 | about changing the DT_RELA entry. */ | |
0451c93c | 3313 | s = htab->srelplt->output_section; |
eea6121a | 3314 | dyn.d_un.d_val -= s->size; |
a85d7ed0 NC |
3315 | break; |
3316 | } | |
0451c93c MS |
3317 | |
3318 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); | |
a85d7ed0 NC |
3319 | } |
3320 | ||
3321 | /* Fill in the special first entry in the procedure linkage table. */ | |
eea6121a | 3322 | if (htab->splt && htab->splt->size > 0) |
a85d7ed0 NC |
3323 | { |
3324 | /* fill in blueprint for plt 0 entry */ | |
0451c93c MS |
3325 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0, |
3326 | htab->splt->contents ); | |
3327 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1, | |
3328 | htab->splt->contents +4 ); | |
3329 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3, | |
3330 | htab->splt->contents +12 ); | |
3331 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4, | |
3332 | htab->splt->contents +16 ); | |
3333 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5, | |
3334 | htab->splt->contents +20 ); | |
3335 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6, | |
3336 | htab->splt->contents + 24); | |
3337 | bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7, | |
3338 | htab->splt->contents + 28 ); | |
a85d7ed0 NC |
3339 | /* Fixup relative address to start of GOT */ |
3340 | bfd_put_32 (output_bfd, | |
0451c93c MS |
3341 | (htab->sgotplt->output_section->vma + |
3342 | htab->sgotplt->output_offset | |
3343 | - htab->splt->output_section->vma - 6)/2, | |
3344 | htab->splt->contents + 8); | |
a85d7ed0 | 3345 | } |
0451c93c MS |
3346 | elf_section_data (htab->splt->output_section) |
3347 | ->this_hdr.sh_entsize = PLT_ENTRY_SIZE; | |
a85d7ed0 NC |
3348 | } |
3349 | ||
0451c93c | 3350 | if (htab->sgotplt) |
a85d7ed0 | 3351 | { |
0451c93c | 3352 | /* Fill in the first three entries in the global offset table. */ |
eea6121a | 3353 | if (htab->sgotplt->size > 0) |
0451c93c MS |
3354 | { |
3355 | bfd_put_64 (output_bfd, | |
3356 | (sdyn == NULL ? (bfd_vma) 0 | |
3357 | : sdyn->output_section->vma + sdyn->output_offset), | |
3358 | htab->sgotplt->contents); | |
3359 | /* One entry for shared object struct ptr. */ | |
3360 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); | |
3361 | /* One entry for _dl_runtime_resolve. */ | |
3362 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12); | |
3363 | } | |
a85d7ed0 | 3364 | |
0451c93c MS |
3365 | elf_section_data (htab->sgot->output_section) |
3366 | ->this_hdr.sh_entsize = 8; | |
3367 | } | |
b34976b6 | 3368 | return TRUE; |
a85d7ed0 NC |
3369 | } |
3370 | ||
4c45e5c9 JJ |
3371 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
3372 | or (bfd_vma) -1 if it should not be included. */ | |
3373 | ||
3374 | static bfd_vma | |
3375 | elf_s390_plt_sym_val (bfd_vma i, const asection *plt, | |
3376 | const arelent *rel ATTRIBUTE_UNUSED) | |
3377 | { | |
3378 | return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE; | |
3379 | } | |
3380 | ||
3381 | ||
ae9a127f NC |
3382 | /* Why was the hash table entry size definition changed from |
3383 | ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and | |
3384 | this is the only reason for the s390_elf64_size_info structure. */ | |
a85d7ed0 NC |
3385 | |
3386 | const struct elf_size_info s390_elf64_size_info = | |
3387 | { | |
3388 | sizeof (Elf64_External_Ehdr), | |
3389 | sizeof (Elf64_External_Phdr), | |
3390 | sizeof (Elf64_External_Shdr), | |
3391 | sizeof (Elf64_External_Rel), | |
3392 | sizeof (Elf64_External_Rela), | |
3393 | sizeof (Elf64_External_Sym), | |
3394 | sizeof (Elf64_External_Dyn), | |
3395 | sizeof (Elf_External_Note), | |
ae9a127f NC |
3396 | 8, /* hash-table entry size. */ |
3397 | 1, /* internal relocations per external relocations. */ | |
3398 | 64, /* arch_size. */ | |
45d6a902 | 3399 | 3, /* log_file_align. */ |
a85d7ed0 NC |
3400 | ELFCLASS64, EV_CURRENT, |
3401 | bfd_elf64_write_out_phdrs, | |
3402 | bfd_elf64_write_shdrs_and_ehdr, | |
3403 | bfd_elf64_write_relocs, | |
73ff0d56 | 3404 | bfd_elf64_swap_symbol_in, |
a85d7ed0 NC |
3405 | bfd_elf64_swap_symbol_out, |
3406 | bfd_elf64_slurp_reloc_table, | |
3407 | bfd_elf64_slurp_symbol_table, | |
3408 | bfd_elf64_swap_dyn_in, | |
3409 | bfd_elf64_swap_dyn_out, | |
947216bf AM |
3410 | bfd_elf64_swap_reloc_in, |
3411 | bfd_elf64_swap_reloc_out, | |
3412 | bfd_elf64_swap_reloca_in, | |
3413 | bfd_elf64_swap_reloca_out | |
a85d7ed0 NC |
3414 | }; |
3415 | ||
3416 | #define TARGET_BIG_SYM bfd_elf64_s390_vec | |
3417 | #define TARGET_BIG_NAME "elf64-s390" | |
3418 | #define ELF_ARCH bfd_arch_s390 | |
3419 | #define ELF_MACHINE_CODE EM_S390 | |
3420 | #define ELF_MACHINE_ALT1 EM_S390_OLD | |
3421 | #define ELF_MAXPAGESIZE 0x1000 | |
3422 | ||
3423 | #define elf_backend_size_info s390_elf64_size_info | |
3424 | ||
3425 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 3426 | #define elf_backend_can_refcount 1 |
a85d7ed0 NC |
3427 | #define elf_backend_want_got_plt 1 |
3428 | #define elf_backend_plt_readonly 1 | |
3429 | #define elf_backend_want_plt_sym 0 | |
3430 | #define elf_backend_got_header_size 24 | |
b491616a | 3431 | #define elf_backend_rela_normal 1 |
a85d7ed0 NC |
3432 | |
3433 | #define elf_info_to_howto elf_s390_info_to_howto | |
3434 | ||
a85d7ed0 NC |
3435 | #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name |
3436 | #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create | |
3437 | #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup | |
3438 | ||
3439 | #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol | |
3440 | #define elf_backend_check_relocs elf_s390_check_relocs | |
0451c93c MS |
3441 | #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol |
3442 | #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections | |
a85d7ed0 NC |
3443 | #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections |
3444 | #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol | |
3445 | #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook | |
3446 | #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook | |
0451c93c | 3447 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
a85d7ed0 NC |
3448 | #define elf_backend_relocate_section elf_s390_relocate_section |
3449 | #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections | |
29c2fb7c | 3450 | #define elf_backend_reloc_type_class elf_s390_reloc_type_class |
4c45e5c9 | 3451 | #define elf_backend_plt_sym_val elf_s390_plt_sym_val |
a85d7ed0 | 3452 | |
69fc87f1 MS |
3453 | #define bfd_elf64_mkobject elf_s390_mkobject |
3454 | #define elf_backend_object_p elf_s390_object_p | |
a85d7ed0 NC |
3455 | |
3456 | #include "elf64-target.h" |